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Linux 3.17-rc2
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
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) {
2229 d_drop(opendata->dentry);
2230 d_add(opendata->dentry, NULL);
2231 nfs_set_verifier(opendata->dentry,
2232 nfs_save_change_attribute(opendata->dir->d_inode));
2233 }
c21443c2 2234 goto out;
4fa2c54b 2235 }
c21443c2
TM		 2236
2237 state = nfs4_opendata_to_nfs4_state(opendata);
2238 ret = PTR_ERR(state);
2239 if (IS_ERR(state))
2240 goto out;
2241 if (server->caps & NFS_CAP_POSIX_LOCK)
2242 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2243
275bb307
TM		 2244 dentry = opendata->dentry;
2245 if (dentry->d_inode == NULL) {
2246 /* FIXME: Is this d_drop() ever needed? */
2247 d_drop(dentry);
2248 dentry = d_add_unique(dentry, igrab(state->inode));
2249 if (dentry == NULL) {
2250 dentry = opendata->dentry;
2251 } else if (dentry != ctx->dentry) {
2252 dput(ctx->dentry);
2253 ctx->dentry = dget(dentry);
2254 }
2255 nfs_set_verifier(dentry,
2256 nfs_save_change_attribute(opendata->dir->d_inode));
2257 }
2258
c21443c2
TM		 2259 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2260 if (ret != 0)
2261 goto out;
2262
3efb9722 2263 ctx->state = state;
c45ffdd2
TM		 2264 if (dentry->d_inode == state->inode) {
2265 nfs_inode_attach_open_context(ctx);
2266 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2267 nfs4_schedule_stateid_recovery(server, state);
2268 }
c21443c2
TM		 2269out:
2270 return ret;
2271}
2272
1da177e4 2273/*
24ac23ab 2274 * Returns a referenced nfs4_state
1da177e4 2275 */
82be417a 2276static int _nfs4_do_open(struct inode *dir,
4197a055 2277 struct nfs_open_context *ctx,
82be417a
AA		 2278 int flags,
2279 struct iattr *sattr,
5bc2afc2
TM		 2280 struct nfs4_label *label,
2281 int *opened)
1da177e4
LT		 2282{
2283 struct nfs4_state_owner *sp;
2284 struct nfs4_state *state = NULL;
2285 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2286 struct nfs4_opendata *opendata;
4197a055
TM		 2287 struct dentry *dentry = ctx->dentry;
2288 struct rpc_cred *cred = ctx->cred;
2289 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2290 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2291 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2292 struct nfs4_label *olabel = NULL;
aac00a8d 2293 int status;
1da177e4
LT		 2294
2295 /* Protect against reboot recovery conflicts */
1da177e4 2296 status = -ENOMEM;
d1e284d5
TM		 2297 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2298 if (sp == NULL) {
1da177e4
LT		 2299 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2300 goto out_err;
2301 }
58d9714a
TM		 2302 status = nfs4_recover_expired_lease(server);
2303 if (status != 0)
b4454fe1 2304 goto err_put_state_owner;
82a2c1b7
AV		 2305 if (dentry->d_inode != NULL)
2306 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2307 status = -ENOMEM;
49f9a0fa
TM		 2308 if (dentry->d_inode)
2309 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2310 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2311 label, claim, GFP_KERNEL);
e56e0b78 2312 if (opendata == NULL)
95d35cb4 2313 goto err_put_state_owner;
1da177e4 2314
14c43f76
DQ		 2315 if (label) {
2316 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2317 if (IS_ERR(olabel)) {
2318 status = PTR_ERR(olabel);
2319 goto err_opendata_put;
2320 }
2321 }
2322
e911b815
TM		 2323 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2324 if (!opendata->f_attr.mdsthreshold) {
2325 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2326 if (!opendata->f_attr.mdsthreshold)
2327 goto err_free_label;
2328 }
1549210f 2329 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2330 }
82a2c1b7
AV		 2331 if (dentry->d_inode != NULL)
2332 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2333
3efb9722 2334 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2335 if (status != 0)
14c43f76 2336 goto err_free_label;
3efb9722 2337 state = ctx->state;
6168f62c 2338
549b19cc
TM		 2339 if ((opendata->o_arg.open_flags & O_EXCL) &&
2340 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2341 nfs4_exclusive_attrset(opendata, sattr);
2342
2343 nfs_fattr_init(opendata->o_res.f_attr);
2344 status = nfs4_do_setattr(state->inode, cred,
2345 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2346 state, label, olabel);
2347 if (status == 0) {
0ab64e0e 2348 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2349 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2350 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2351 }
0ab64e0e 2352 }
5bc2afc2
TM		 2353 if (opendata->file_created)
2354 *opened |= FILE_CREATED;
82be417a 2355
e911b815 2356 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2357 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2358 opendata->f_attr.mdsthreshold = NULL;
2359 }
82be417a 2360
14c43f76
DQ		 2361 nfs4_label_free(olabel);
2362
c6d00e63 2363 nfs4_opendata_put(opendata);
1da177e4 2364 nfs4_put_state_owner(sp);
1da177e4 2365 return 0;
14c43f76
DQ		 2366err_free_label:
2367 nfs4_label_free(olabel);
c6d00e63
TM		 2368err_opendata_put:
2369 nfs4_opendata_put(opendata);
e56e0b78
TM		 2370err_put_state_owner:
2371 nfs4_put_state_owner(sp);
1da177e4 2372out_err:
1da177e4
LT		 2373 return status;
2374}
2375
2376
82be417a 2377static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2378 struct nfs_open_context *ctx,
82be417a
AA		 2379 int flags,
2380 struct iattr *sattr,
5bc2afc2
TM		 2381 struct nfs4_label *label,
2382 int *opened)
1da177e4 2383{
49f9a0fa 2384 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2385 struct nfs4_exception exception = { };
2386 struct nfs4_state *res;
2387 int status;
2388
2389 do {
5bc2afc2 2390 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2391 res = ctx->state;
42113a75 2392 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2393 if (status == 0)
2394 break;
2395 /* NOTE: BAD_SEQID means the server and client disagree about the
2396 * book-keeping w.r.t. state-changing operations
2397 * (OPEN/CLOSE/LOCK/LOCKU...)
2398 * It is actually a sign of a bug on the client or on the server.
2399 *
2400 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2401 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2402 * have unhashed the old state_owner for us, and that we can
2403 * therefore safely retry using a new one. We should still warn
2404 * the user though...
2405 */
2406 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2407 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2408 " returned a bad sequence-id error!\n",
2409 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2410 exception.retry = 1;
2411 continue;
2412 }
550f5747
TM		 2413 /*
2414 * BAD_STATEID on OPEN means that the server cancelled our
2415 * state before it received the OPEN_CONFIRM.
2416 * Recover by retrying the request as per the discussion
2417 * on Page 181 of RFC3530.
2418 */
2419 if (status == -NFS4ERR_BAD_STATEID) {
2420 exception.retry = 1;
2421 continue;
2422 }
aac00a8d
TM		 2423 if (status == -EAGAIN) {
2424 /* We must have found a delegation */
2425 exception.retry = 1;
2426 continue;
2427 }
49f9a0fa
TM		 2428 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2429 continue;
2430 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2431 status, &exception));
2432 } while (exception.retry);
2433 return res;
2434}
2435
659bfcd6
TM		 2436static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2437 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2438 struct nfs4_state *state, struct nfs4_label *ilabel,
2439 struct nfs4_label *olabel)
1da177e4 2440{
3e4f6290 2441 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2442 struct nfs_setattrargs arg = {
3e4f6290 2443 .fh = NFS_FH(inode),
1da177e4
LT		 2444 .iap = sattr,
2445 .server = server,
2446 .bitmask = server->attr_bitmask,
1775fd3e 2447 .label = ilabel,
1da177e4
LT		 2448 };
2449 struct nfs_setattrres res = {
2450 .fattr = fattr,
1775fd3e 2451 .label = olabel,
1da177e4
LT		 2452 .server = server,
2453 };
2454 struct rpc_message msg = {
659bfcd6
TM		 2455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2456 .rpc_argp = &arg,
2457 .rpc_resp = &res,
2458 .rpc_cred = cred,
1da177e4 2459 };
26e976a8 2460 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2461 fmode_t fmode;
2462 bool truncate;
65e4308d 2463 int status;
1da177e4 2464
aa9c2669
DQ		 2465 arg.bitmask = nfs4_bitmask(server, ilabel);
2466 if (ilabel)
2467 arg.bitmask = nfs4_bitmask(server, olabel);
2468
0e574af1 2469 nfs_fattr_init(fattr);
1da177e4 2470
ee3ae84e
TM		 2471 /* Servers should only apply open mode checks for file size changes */
2472 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2473 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2474
2475 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2476 /* Use that stateid */
0418dae1 2477 } else if (truncate && state != NULL) {
2a369153
TM		 2478 struct nfs_lockowner lockowner = {
2479 .l_owner = current->files,
2480 .l_pid = current->tgid,
2481 };
0418dae1
TM		 2482 if (!nfs4_valid_open_stateid(state))
2483 return -EBADF;
2484 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2485 &lockowner) == -EIO)
2486 return -EBADF;
08e9eac4 2487 } else
f597c537 2488 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2489
7c513058 2490 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2491 if (status == 0 && state != NULL)
2492 renew_lease(server, timestamp);
65e4308d 2493 return status;
1da177e4
LT		 2494}
2495
659bfcd6
TM		 2496static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2497 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2498 struct nfs4_state *state, struct nfs4_label *ilabel,
2499 struct nfs4_label *olabel)
1da177e4 2500{
3e4f6290 2501 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2502 struct nfs4_exception exception = {
2503 .state = state,
3114ea7a 2504 .inode = inode,
a1d0b5ee 2505 };
1da177e4
LT		 2506 int err;
2507 do {
1775fd3e 2508 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2509 trace_nfs4_setattr(inode, err);
451146be
TM		 2510 switch (err) {
2511 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2512 if (!(sattr->ia_valid & ATTR_SIZE)) {
2513 pr_warn_once("NFSv4: server %s is incorrectly "
2514 "applying open mode checks to "
2515 "a SETATTR that is not "
2516 "changing file size.\n",
2517 server->nfs_client->cl_hostname);
2518 }
451146be
TM		 2519 if (state && !(state->state & FMODE_WRITE)) {
2520 err = -EBADF;
2521 if (sattr->ia_valid & ATTR_OPEN)
2522 err = -EACCES;
2523 goto out;
2524 }
2525 }
2526 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2527 } while (exception.retry);
451146be 2528out:
1da177e4
LT		 2529 return err;
2530}
2531
2532struct nfs4_closedata {
2533 struct inode *inode;
2534 struct nfs4_state *state;
2535 struct nfs_closeargs arg;
2536 struct nfs_closeres res;
516a6af6 2537 struct nfs_fattr fattr;
26e976a8 2538 unsigned long timestamp;
f7e8917a
FI		 2539 bool roc;
2540 u32 roc_barrier;
1da177e4
LT		 2541};
2542
963d8fe5 2543static void nfs4_free_closedata(void *data)
9512135d 2544{
963d8fe5
TM		 2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2547 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2548
f7e8917a
FI		 2549 if (calldata->roc)
2550 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2551 nfs4_put_open_state(calldata->state);
2552 nfs_free_seqid(calldata->arg.seqid);
9512135d 2553 nfs4_put_state_owner(sp);
322b2b90 2554 nfs_sb_deactive(sb);
9512135d
TM		 2555 kfree(calldata);
2556}
2557
963d8fe5 2558static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2559{
963d8fe5 2560 struct nfs4_closedata *calldata = data;
1da177e4 2561 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2562 struct nfs_server *server = NFS_SERVER(calldata->inode);
2563
a3ca5651 2564 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2565 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2566 return;
42113a75 2567 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2568 /* hmm. we are done with the inode, and in the process of freeing
2569 * the state_owner. we keep this around to process errors
2570 */
1da177e4
LT		 2571 switch (task->tk_status) {
2572 case 0:
f7e8917a
FI		 2573 if (calldata->roc)
2574 pnfs_roc_set_barrier(state->inode,
2575 calldata->roc_barrier);
226056c5 2576 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2577 renew_lease(server, calldata->timestamp);
226056c5 2578 goto out_release;
69794ad7 2579 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2580 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2581 case -NFS4ERR_OLD_STATEID:
2582 case -NFS4ERR_BAD_STATEID:
1da177e4 2583 case -NFS4ERR_EXPIRED:
dc0b027d 2584 if (calldata->arg.fmode == 0)
9e33bed5 2585 break;
1da177e4 2586 default:
69794ad7 2587 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2588 rpc_restart_call_prepare(task);
69794ad7
TM		 2589 goto out_release;
2590 }
1da177e4 2591 }
226056c5 2592 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
69794ad7 2593out_release:
72211dbe 2594 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2595 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2596 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2597}
2598
4ce70ada 2599static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2600{
4ce70ada 2601 struct nfs4_closedata *calldata = data;
9512135d 2602 struct nfs4_state *state = calldata->state;
7fdab069 2603 struct inode *inode = calldata->inode;
88069f77 2604 int call_close = 0;
9512135d 2605
a3ca5651 2606 dprintk("%s: begin!\n", __func__);
963d8fe5 2607 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2608 goto out_wait;
003707c7 2609
88069f77
TM		 2610 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2611 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2612 spin_lock(&state->owner->so_lock);
003707c7 2613 /* Calculate the change in open mode */
e7616923 2614 if (state->n_rdwr == 0) {
003707c7 2615 if (state->n_rdonly == 0) {
88069f77
TM		 2616 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2617 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2618 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2619 }
2620 if (state->n_wronly == 0) {
88069f77
TM		 2621 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2622 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2623 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2624 }
e7616923 2625 }
5d422301
TM		 2626 if (!nfs4_valid_open_stateid(state))
2627 call_close = 0;
4cecb76f 2628 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2629
2630 if (!call_close) {
963d8fe5 2631 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2632 goto out_no_action;
9512135d 2633 }
88069f77 2634
f7e8917a 2635 if (calldata->arg.fmode == 0) {
88069f77 2636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2637 if (calldata->roc &&
b9536ad5
AA		 2638 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2639 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2640 goto out_wait;
b9536ad5 2641 }
f7e8917a 2642 }
88069f77 2643
516a6af6 2644 nfs_fattr_init(calldata->res.fattr);
26e976a8 2645 calldata->timestamp = jiffies;
7fdab069 2646 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2647 &calldata->arg.seq_args,
2648 &calldata->res.seq_res,
2240a9e2
TM		 2649 task) != 0)
2650 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2651 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2652 return;
2653out_no_action:
2654 task->tk_action = NULL;
2655out_wait:
2656 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2657}
2658
963d8fe5 2659static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2660 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2661 .rpc_call_done = nfs4_close_done,
2662 .rpc_release = nfs4_free_closedata,
2663};
2664
fe08c546
PT		 2665static bool nfs4_state_has_opener(struct nfs4_state *state)
2666{
2667 /* first check existing openers */
2668 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2669 state->n_rdonly != 0)
2670 return true;
2671
2672 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2673 state->n_wronly != 0)
2674 return true;
2675
2676 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2677 state->n_rdwr != 0)
2678 return true;
2679
2680 return false;
2681}
2682
2683static bool nfs4_roc(struct inode *inode)
2684{
2685 struct nfs_inode *nfsi = NFS_I(inode);
2686 struct nfs_open_context *ctx;
2687 struct nfs4_state *state;
2688
2689 spin_lock(&inode->i_lock);
2690 list_for_each_entry(ctx, &nfsi->open_files, list) {
2691 state = ctx->state;
2692 if (state == NULL)
2693 continue;
2694 if (nfs4_state_has_opener(state)) {
2695 spin_unlock(&inode->i_lock);
2696 return false;
2697 }
2698 }
2699 spin_unlock(&inode->i_lock);
2700
2701 if (nfs4_check_delegation(inode, FMODE_READ))
2702 return false;
2703
2704 return pnfs_roc(inode);
2705}
2706
1da177e4
LT		 2707/*
2708 * It is possible for data to be read/written from a mem-mapped file
2709 * after the sys_close call (which hits the vfs layer as a flush).
2710 * This means that we can't safely call nfsv4 close on a file until
2711 * the inode is cleared. This in turn means that we are not good
2712 * NFSv4 citizens - we do not indicate to the server to update the file's
2713 * share state even when we are done with one of the three share
2714 * stateid's in the inode.
2715 *
2716 * NOTE: Caller must be holding the sp->so_owner semaphore!
2717 */
1f7977c1 2718int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2719{
4a35bd41 2720 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2721 struct nfs4_closedata *calldata;
b39e625b
TM		 2722 struct nfs4_state_owner *sp = state->owner;
2723 struct rpc_task *task;
5138fde0
TM		 2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2726 .rpc_cred = state->owner->so_cred,
2727 };
c970aa85
TM		 2728 struct rpc_task_setup task_setup_data = {
2729 .rpc_client = server->client,
5138fde0 2730 .rpc_message = &msg,
c970aa85 2731 .callback_ops = &nfs4_close_ops,
101070ca 2732 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2733 .flags = RPC_TASK_ASYNC,
2734 };
9512135d 2735 int status = -ENOMEM;
1da177e4 2736
fa940720
WAA		 2737 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2738 &task_setup_data.rpc_client, &msg);
2739
8535b2be 2740 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2741 if (calldata == NULL)
9512135d 2742 goto out;
a9c92d6b 2743 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2744 calldata->inode = state->inode;
1da177e4 2745 calldata->state = state;
4a35bd41 2746 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2747 calldata->arg.stateid = &state->open_stateid;
1da177e4 2748 /* Serialization for the sequence id */
8535b2be 2749 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2750 if (calldata->arg.seqid == NULL)
2751 goto out_free_calldata;
dc0b027d 2752 calldata->arg.fmode = 0;
a65318bf 2753 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2754 calldata->res.fattr = &calldata->fattr;
c1d51931 2755 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2756 calldata->res.server = server;
fe08c546 2757 calldata->roc = nfs4_roc(state->inode);
643168c2 2758 nfs_sb_active(calldata->inode->i_sb);
9512135d 2759
1174dd1f
TM		 2760 msg.rpc_argp = &calldata->arg;
2761 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2762 task_setup_data.callback_data = calldata;
2763 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2764 if (IS_ERR(task))
2765 return PTR_ERR(task);
a49c3c77
TM		 2766 status = 0;
2767 if (wait)
2768 status = rpc_wait_for_completion_task(task);
b39e625b 2769 rpc_put_task(task);
a49c3c77 2770 return status;
9512135d
TM		 2771out_free_calldata:
2772 kfree(calldata);
2773out:
b39e625b
TM		 2774 nfs4_put_open_state(state);
2775 nfs4_put_state_owner(sp);
9512135d 2776 return status;
1da177e4
LT		 2777}
2778
2b484297 2779static struct inode *
5bc2afc2
TM		 2780nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2781 int open_flags, struct iattr *attr, int *opened)
1da177e4 2782{
1da177e4 2783 struct nfs4_state *state;
aa9c2669
DQ		 2784 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2785
2786 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2787
565277f6 2788 /* Protect against concurrent sillydeletes */
5bc2afc2 2789 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2790
2791 nfs4_label_release_security(label);
2792
f46e0bd3
TM		 2793 if (IS_ERR(state))
2794 return ERR_CAST(state);
275bb307 2795 return state->inode;
1da177e4
LT		 2796}
2797
1185a552 2798static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2799{
2800 if (ctx->state == NULL)
2801 return;
2802 if (is_sync)
643168c2 2803 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2804 else
643168c2 2805 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2806}
1da177e4 2807
b944dba3
TM		 2808#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2809#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2810#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2811
1da177e4
LT		 2812static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2813{
43652ad5
BH		 2814 struct nfs4_server_caps_arg args = {
2815 .fhandle = fhandle,
2816 };
1da177e4
LT		 2817 struct nfs4_server_caps_res res = {};
2818 struct rpc_message msg = {
2819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2820 .rpc_argp = &args,
1da177e4
LT		 2821 .rpc_resp = &res,
2822 };
2823 int status;
2824
7c513058 2825 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2826 if (status == 0) {
b944dba3
TM		 2827 /* Sanity check the server answers */
2828 switch (server->nfs_client->cl_minorversion) {
2829 case 0:
2830 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2831 res.attr_bitmask[2] = 0;
2832 break;
2833 case 1:
2834 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2835 break;
2836 case 2:
2837 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2838 }
1da177e4 2839 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2840 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2841 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2842 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2843 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2844 NFS_CAP_CTIME|NFS_CAP_MTIME|
2845 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2846 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2847 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2848 server->caps |= NFS_CAP_ACLS;
2849 if (res.has_links != 0)
2850 server->caps |= NFS_CAP_HARDLINKS;
2851 if (res.has_symlinks != 0)
2852 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2853 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2854 server->caps |= NFS_CAP_FILEID;
2855 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2856 server->caps |= NFS_CAP_MODE;
2857 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2858 server->caps |= NFS_CAP_NLINK;
2859 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2860 server->caps |= NFS_CAP_OWNER;
2861 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2862 server->caps |= NFS_CAP_OWNER_GROUP;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2864 server->caps |= NFS_CAP_ATIME;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2866 server->caps |= NFS_CAP_CTIME;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2868 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2869#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2870 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2871 server->caps |= NFS_CAP_SECURITY_LABEL;
2872#endif
2873 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2874 sizeof(server->attr_bitmask));
b944dba3 2875 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2876
a65318bf
TM		 2877 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2878 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2879 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2880 server->cache_consistency_bitmask[2] = 0;
1da177e4 2881 server->acl_bitmask = res.acl_bitmask;
264e6351 2882 server->fh_expire_type = res.fh_expire_type;
1da177e4 2883 }
cccef3b9 2884
1da177e4
LT		 2885 return status;
2886}
2887
55a97593 2888int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2889{
2890 struct nfs4_exception exception = { };
2891 int err;
2892 do {
2893 err = nfs4_handle_exception(server,
2894 _nfs4_server_capabilities(server, fhandle),
2895 &exception);
2896 } while (exception.retry);
2897 return err;
2898}
2899
2900static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2901 struct nfs_fsinfo *info)
2902{
aa9c2669 2903 u32 bitmask[3];
1da177e4 2904 struct nfs4_lookup_root_arg args = {
aa9c2669 2905 .bitmask = bitmask,
1da177e4
LT		 2906 };
2907 struct nfs4_lookup_res res = {
2908 .server = server,
0e574af1 2909 .fattr = info->fattr,
1da177e4
LT		 2910 .fh = fhandle,
2911 };
2912 struct rpc_message msg = {
2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2914 .rpc_argp = &args,
2915 .rpc_resp = &res,
2916 };
008f55d0 2917
aa9c2669
DQ		 2918 bitmask[0] = nfs4_fattr_bitmap[0];
2919 bitmask[1] = nfs4_fattr_bitmap[1];
2920 /*
2921 * Process the label in the upcoming getfattr
2922 */
2923 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2924
0e574af1 2925 nfs_fattr_init(info->fattr);
7c513058 2926 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2927}
2928
2929static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_fsinfo *info)
2931{
2932 struct nfs4_exception exception = { };
2933 int err;
2934 do {
fb8a5ba8 2935 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2936 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2937 switch (err) {
2938 case 0:
2939 case -NFS4ERR_WRONGSEC:
05e9cfb4 2940 goto out;
fb8a5ba8
BS		 2941 default:
2942 err = nfs4_handle_exception(server, err, &exception);
2943 }
1da177e4 2944 } while (exception.retry);
05e9cfb4 2945out:
1da177e4
LT		 2946 return err;
2947}
2948
8f70e95f
BS		 2949static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2950 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2951{
c2190661
TM		 2952 struct rpc_auth_create_args auth_args = {
2953 .pseudoflavor = flavor,
2954 };
8f70e95f
BS		 2955 struct rpc_auth *auth;
2956 int ret;
2957
c2190661 2958 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2959 if (IS_ERR(auth)) {
75bc8821 2960 ret = -EACCES;
8f70e95f
BS		 2961 goto out;
2962 }
2963 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2964out:
2965 return ret;
2966}
2967
9a744ba3
CL		 2968/*
2969 * Retry pseudoroot lookup with various security flavors. We do this when:
2970 *
2971 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2972 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2973 *
2974 * Returns zero on success, or a negative NFS4ERR value, or a
2975 * negative errno value.
2976 */
801a16dc 2977static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2978 struct nfs_fsinfo *info)
1da177e4 2979{
9a744ba3
CL		 2980 /* Per 3530bis 15.33.5 */
2981 static const rpc_authflavor_t flav_array[] = {
2982 RPC_AUTH_GSS_KRB5P,
2983 RPC_AUTH_GSS_KRB5I,
2984 RPC_AUTH_GSS_KRB5,
c4eafe11 2985 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2986 RPC_AUTH_NULL,
2987 };
2988 int status = -EPERM;
2989 size_t i;
6a1a1e34 2990
4d4b69dd
WAA		 2991 if (server->auth_info.flavor_len > 0) {
2992 /* try each flavor specified by user */
2993 for (i = 0; i < server->auth_info.flavor_len; i++) {
2994 status = nfs4_lookup_root_sec(server, fhandle, info,
2995 server->auth_info.flavors[i]);
2996 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2997 continue;
2998 break;
2999 }
3000 } else {
3001 /* no flavors specified by user, try default list */
3002 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3003 status = nfs4_lookup_root_sec(server, fhandle, info,
3004 flav_array[i]);
3005 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3006 continue;
3007 break;
3008 }
8f70e95f 3009 }
9a744ba3 3010
fb8a5ba8
BS		 3011 /*
3012 * -EACCESS could mean that the user doesn't have correct permissions
3013 * to access the mount. It could also mean that we tried to mount
3014 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3015 * existing mount programs don't handle -EACCES very well so it should
3016 * be mapped to -EPERM instead.
3017 */
3018 if (status == -EACCES)
3019 status = -EPERM;
801a16dc
BS		 3020 return status;
3021}
3022
2ed4b95b
CL		 3023static int nfs4_do_find_root_sec(struct nfs_server *server,
3024 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3025{
3026 int mv = server->nfs_client->cl_minorversion;
3027 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3028}
3029
3030/**
3031 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3032 * @server: initialized nfs_server handle
3033 * @fhandle: we fill in the pseudo-fs root file handle
3034 * @info: we fill in an FSINFO struct
5e6b1990 3035 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3036 *
3037 * Returns zero on success, or a negative errno.
801a16dc 3038 */
3028eb2b 3039int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3040 struct nfs_fsinfo *info,
3041 bool auth_probe)
801a16dc 3042{
2ed4b95b
CL		 3043 int status;
3044
5e6b1990
TM		 3045 switch (auth_probe) {
3046 case false:
3047 status = nfs4_lookup_root(server, fhandle, info);
3048 if (status != -NFS4ERR_WRONGSEC)
3049 break;
5e6b1990 3050 default:
2ed4b95b 3051 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3052 }
2ed4b95b 3053
1da177e4
LT		 3054 if (status == 0)
3055 status = nfs4_server_capabilities(server, fhandle);
3056 if (status == 0)
3057 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3058
c12e87f4 3059 return nfs4_map_errors(status);
1da177e4
LT		 3060}
3061
bae36241
BS		 3062static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3063 struct nfs_fsinfo *info)
3064{
3065 int error;
3066 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3067 struct nfs4_label *label = NULL;
bae36241
BS		 3068
3069 error = nfs4_server_capabilities(server, mntfh);
3070 if (error < 0) {
3071 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3072 return error;
3073 }
3074
14c43f76
DQ		 3075 label = nfs4_label_alloc(server, GFP_KERNEL);
3076 if (IS_ERR(label))
3077 return PTR_ERR(label);
3078
1775fd3e 3079 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3080 if (error < 0) {
3081 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3082 goto err_free_label;
bae36241
BS		 3083 }
3084
3085 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3086 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3087 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3088
14c43f76
DQ		 3089err_free_label:
3090 nfs4_label_free(label);
3091
bae36241
BS		 3092 return error;
3093}
3094
6b97fd3d
MN		 3095/*
3096 * Get locations and (maybe) other attributes of a referral.
3097 * Note that we'll actually follow the referral later when
3098 * we detect fsid mismatch in inode revalidation
3099 */
f05d147f
BS		 3100static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3101 const struct qstr *name, struct nfs_fattr *fattr,
3102 struct nfs_fh *fhandle)
6b97fd3d
MN		 3103{
3104 int status = -ENOMEM;
3105 struct page *page = NULL;
3106 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3107
3108 page = alloc_page(GFP_KERNEL);
3109 if (page == NULL)
3110 goto out;
3111 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3112 if (locations == NULL)
3113 goto out;
3114
f05d147f 3115 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3116 if (status != 0)
3117 goto out;
519ae255
CL		 3118
3119 /*
3120 * If the fsid didn't change, this is a migration event, not a
3121 * referral. Cause us to drop into the exception handler, which
3122 * will kick off migration recovery.
3123 */
6b97fd3d 3124 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3125 dprintk("%s: server did not return a different fsid for"
3126 " a referral at %s\n", __func__, name->name);
519ae255 3127 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3128 goto out;
3129 }
533eb461
AA		 3130 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3131 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3132
533eb461 3133 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3134 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3135 memset(fhandle, 0, sizeof(struct nfs_fh));
3136out:
3137 if (page)
3138 __free_page(page);
5d7ca35a 3139 kfree(locations);
6b97fd3d
MN		 3140 return status;
3141}
3142
1775fd3e
DQ		 3143static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3144 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3145{
3146 struct nfs4_getattr_arg args = {
3147 .fh = fhandle,
3148 .bitmask = server->attr_bitmask,
3149 };
3150 struct nfs4_getattr_res res = {
3151 .fattr = fattr,
1775fd3e 3152 .label = label,
1da177e4
LT		 3153 .server = server,
3154 };
3155 struct rpc_message msg = {
3156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3157 .rpc_argp = &args,
3158 .rpc_resp = &res,
3159 };
aa9c2669
DQ		 3160
3161 args.bitmask = nfs4_bitmask(server, label);
3162
0e574af1 3163 nfs_fattr_init(fattr);
7c513058 3164 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3165}
3166
1775fd3e
DQ		 3167static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3168 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3169{
3170 struct nfs4_exception exception = { };
3171 int err;
3172 do {
b5f875a9
TM		 3173 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3174 trace_nfs4_getattr(server, fhandle, fattr, err);
3175 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3176 &exception);
3177 } while (exception.retry);
3178 return err;
3179}
3180
3181/*
3182 * The file is not closed if it is opened due to the a request to change
3183 * the size of the file. The open call will not be needed once the
3184 * VFS layer lookup-intents are implemented.
3185 *
3186 * Close is called when the inode is destroyed.
3187 * If we haven't opened the file for O_WRONLY, we
3188 * need to in the size_change case to obtain a stateid.
3189 *
3190 * Got race?
3191 * Because OPEN is always done by name in nfsv4, it is
3192 * possible that we opened a different file by the same
3193 * name. We can recognize this race condition, but we
3194 * can't do anything about it besides returning an error.
3195 *
3196 * This will be fixed with VFS changes (lookup-intent).
3197 */
3198static int
3199nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3200 struct iattr *sattr)
3201{
08e9eac4 3202 struct inode *inode = dentry->d_inode;
659bfcd6 3203 struct rpc_cred *cred = NULL;
d530838b 3204 struct nfs4_state *state = NULL;
14c43f76 3205 struct nfs4_label *label = NULL;
1da177e4
LT		 3206 int status;
3207
8a1636c4 3208 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3209 pnfs_commit_and_return_layout(inode);
8a1636c4 3210
0e574af1 3211 nfs_fattr_init(fattr);
1da177e4 3212
2669940d
AA		 3213 /* Deal with open(O_TRUNC) */
3214 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3215 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3216
3217 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3218 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3219 return 0;
3220
d530838b 3221 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3222 if (sattr->ia_valid & ATTR_FILE) {
3223 struct nfs_open_context *ctx;
3224
3225 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3226 if (ctx) {
3227 cred = ctx->cred;
3228 state = ctx->state;
3229 }
659bfcd6 3230 }
08e9eac4 3231
14c43f76
DQ		 3232 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3233 if (IS_ERR(label))
3234 return PTR_ERR(label);
3235
3236 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3237 if (status == 0) {
65e4308d 3238 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3239 nfs_setsecurity(inode, fattr, label);
3240 }
14c43f76 3241 nfs4_label_free(label);
1da177e4
LT		 3242 return status;
3243}
3244
0c2e53f1
TM		 3245static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3246 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3247 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3248{
0c2e53f1 3249 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3250 int status;
3251 struct nfs4_lookup_arg args = {
3252 .bitmask = server->attr_bitmask,
0c2e53f1 3253 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3254 .name = name,
3255 };
3256 struct nfs4_lookup_res res = {
3257 .server = server,
3258 .fattr = fattr,
aa9c2669 3259 .label = label,
2b3de441
DH		 3260 .fh = fhandle,
3261 };
3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3264 .rpc_argp = &args,
3265 .rpc_resp = &res,
3266 };
3267
aa9c2669
DQ		 3268 args.bitmask = nfs4_bitmask(server, label);
3269
2b3de441
DH		 3270 nfs_fattr_init(fattr);
3271
1da177e4 3272 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3273 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3274 dprintk("NFS reply lookup: %d\n", status);
3275 return status;
3276}
3277
72de53ec 3278static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3279{
7ebb9315 3280 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3281 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3282 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3283 fattr->nlink = 2;
3284}
3285
72de53ec
BS		 3286static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3287 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3288 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3289{
3290 struct nfs4_exception exception = { };
72de53ec 3291 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3292 int err;
3293 do {
1775fd3e 3294 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3295 trace_nfs4_lookup(dir, name, err);
72de53ec 3296 switch (err) {
08ef7bd3 3297 case -NFS4ERR_BADNAME:
72de53ec
BS		 3298 err = -ENOENT;
3299 goto out;
0c2e53f1 3300 case -NFS4ERR_MOVED:
f05d147f 3301 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3302 goto out;
0c2e53f1 3303 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3304 err = -EPERM;
3305 if (client != *clnt)
3306 goto out;
66b06860 3307 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3308 if (IS_ERR(client))
3309 return PTR_ERR(client);
3310
3311 exception.retry = 1;
3312 break;
3313 default:
3314 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3315 }
1da177e4 3316 } while (exception.retry);
72de53ec
BS		 3317
3318out:
3319 if (err == 0)
3320 *clnt = client;
3321 else if (client != *clnt)
3322 rpc_shutdown_client(client);
3323
1da177e4
LT		 3324 return err;
3325}
3326
80a16b21 3327static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3328 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3329 struct nfs4_label *label)
72de53ec
BS		 3330{
3331 int status;
3332 struct rpc_clnt *client = NFS_CLIENT(dir);
3333
1775fd3e 3334 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3335 if (client != NFS_CLIENT(dir)) {
3336 rpc_shutdown_client(client);
3337 nfs_fixup_secinfo_attributes(fattr);
3338 }
3339 return status;
3340}
3341
f05d147f
BS		 3342struct rpc_clnt *
3343nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3344 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3345{
b72888cb 3346 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3347 int status;
f05d147f 3348
1775fd3e 3349 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3350 if (status < 0)
f05d147f 3351 return ERR_PTR(status);
b72888cb 3352 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3353}
3354
1da177e4
LT		 3355static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3356{
76b32999 3357 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3358 struct nfs4_accessargs args = {
3359 .fh = NFS_FH(inode),
a4980e78 3360 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3361 };
3362 struct nfs4_accessres res = {
3363 .server = server,
1da177e4 3364 };
1da177e4
LT		 3365 struct rpc_message msg = {
3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3367 .rpc_argp = &args,
3368 .rpc_resp = &res,
3369 .rpc_cred = entry->cred,
3370 };
3371 int mode = entry->mask;
aa9c2669 3372 int status = 0;
1da177e4
LT		 3373
3374 /*
3375 * Determine which access bits we want to ask for...
3376 */
3377 if (mode & MAY_READ)
3378 args.access |= NFS4_ACCESS_READ;
3379 if (S_ISDIR(inode->i_mode)) {
3380 if (mode & MAY_WRITE)
3381 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3382 if (mode & MAY_EXEC)
3383 args.access |= NFS4_ACCESS_LOOKUP;
3384 } else {
3385 if (mode & MAY_WRITE)
3386 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3387 if (mode & MAY_EXEC)
3388 args.access |= NFS4_ACCESS_EXECUTE;
3389 }
c407d41a
TM		 3390
3391 res.fattr = nfs_alloc_fattr();
3392 if (res.fattr == NULL)
3393 return -ENOMEM;
3394
7c513058 3395 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3396 if (!status) {
6168f62c 3397 nfs_access_set_mask(entry, res.access);
c407d41a 3398 nfs_refresh_inode(inode, res.fattr);
1da177e4 3399 }
c407d41a 3400 nfs_free_fattr(res.fattr);
1da177e4
LT		 3401 return status;
3402}
3403
3404static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3405{
3406 struct nfs4_exception exception = { };
3407 int err;
3408 do {
c1578b76
TM		 3409 err = _nfs4_proc_access(inode, entry);
3410 trace_nfs4_access(inode, err);
3411 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3412 &exception);
3413 } while (exception.retry);
3414 return err;
3415}
3416
3417/*
3418 * TODO: For the time being, we don't try to get any attributes
3419 * along with any of the zero-copy operations READ, READDIR,
3420 * READLINK, WRITE.
3421 *
3422 * In the case of the first three, we want to put the GETATTR
3423 * after the read-type operation -- this is because it is hard
3424 * to predict the length of a GETATTR response in v4, and thus
3425 * align the READ data correctly. This means that the GETATTR
3426 * may end up partially falling into the page cache, and we should
3427 * shift it into the 'tail' of the xdr_buf before processing.
3428 * To do this efficiently, we need to know the total length
3429 * of data received, which doesn't seem to be available outside
3430 * of the RPC layer.
3431 *
3432 * In the case of WRITE, we also want to put the GETATTR after
3433 * the operation -- in this case because we want to make sure
140150db 3434 * we get the post-operation mtime and size.
1da177e4
LT		 3435 *
3436 * Both of these changes to the XDR layer would in fact be quite
3437 * minor, but I decided to leave them for a subsequent patch.
3438 */
3439static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3440 unsigned int pgbase, unsigned int pglen)
3441{
3442 struct nfs4_readlink args = {
3443 .fh = NFS_FH(inode),
3444 .pgbase = pgbase,
3445 .pglen = pglen,
3446 .pages = &page,
3447 };
f50c7000 3448 struct nfs4_readlink_res res;
1da177e4
LT		 3449 struct rpc_message msg = {
3450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3451 .rpc_argp = &args,
f50c7000 3452 .rpc_resp = &res,
1da177e4
LT		 3453 };
3454
7c513058 3455 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3456}
3457
3458static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3459 unsigned int pgbase, unsigned int pglen)
3460{
3461 struct nfs4_exception exception = { };
3462 int err;
3463 do {
c1578b76
TM		 3464 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3465 trace_nfs4_readlink(inode, err);
3466 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3467 &exception);
3468 } while (exception.retry);
3469 return err;
3470}
3471
1da177e4 3472/*
8867fe58 3473 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3474 */
1da177e4
LT		 3475static int
3476nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3477 int flags)
1da177e4 3478{
aa9c2669 3479 struct nfs4_label l, *ilabel = NULL;
8867fe58 3480 struct nfs_open_context *ctx;
1da177e4 3481 struct nfs4_state *state;
5bc2afc2 3482 int opened = 0;
1da177e4
LT		 3483 int status = 0;
3484
8867fe58
MS		 3485 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3486 if (IS_ERR(ctx))
3487 return PTR_ERR(ctx);
3488
aa9c2669
DQ		 3489 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3490
a8a5da99 3491 sattr->ia_mode &= ~current_umask();
5bc2afc2 3492 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3493 if (IS_ERR(state)) {
3494 status = PTR_ERR(state);
c0204fd2 3495 goto out;
1da177e4 3496 }
1da177e4 3497out:
aa9c2669 3498 nfs4_label_release_security(ilabel);
8867fe58 3499 put_nfs_open_context(ctx);
1da177e4
LT		 3500 return status;
3501}
3502
3503static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3504{
16e42959 3505 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3506 struct nfs_removeargs args = {
1da177e4 3507 .fh = NFS_FH(dir),
26fe5750 3508 .name = *name,
16e42959 3509 };
4fdc17b2 3510 struct nfs_removeres res = {
16e42959 3511 .server = server,
1da177e4 3512 };
1da177e4 3513 struct rpc_message msg = {
4fdc17b2
TM		 3514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3515 .rpc_argp = &args,
3516 .rpc_resp = &res,
1da177e4 3517 };
778d2817 3518 int status;
1da177e4 3519
7c513058 3520 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3521 if (status == 0)
16e42959 3522 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3523 return status;
3524}
3525
3526static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3527{
3528 struct nfs4_exception exception = { };
3529 int err;
3530 do {
078ea3df
TM		 3531 err = _nfs4_proc_remove(dir, name);
3532 trace_nfs4_remove(dir, name, err);
3533 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3534 &exception);
3535 } while (exception.retry);
3536 return err;
3537}
3538
e4eff1a6 3539static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3540{
e4eff1a6
TM		 3541 struct nfs_server *server = NFS_SERVER(dir);
3542 struct nfs_removeargs *args = msg->rpc_argp;
3543 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3544
e4eff1a6 3545 res->server = server;
1da177e4 3546 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3547 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3548
3549 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3550}
3551
34e137cc
BS		 3552static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3553{
d9afbd1b
TM		 3554 nfs4_setup_sequence(NFS_SERVER(data->dir),
3555 &data->args.seq_args,
3556 &data->res.seq_res,
3557 task);
1da177e4
LT		 3558}
3559
e4eff1a6 3560static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3561{
078ea3df
TM		 3562 struct nfs_unlinkdata *data = task->tk_calldata;
3563 struct nfs_removeres *res = &data->res;
e4eff1a6 3564
14516c3a
TM		 3565 if (!nfs4_sequence_done(task, &res->seq_res))
3566 return 0;
9e33bed5 3567 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3568 return 0;
3569 update_changeattr(dir, &res->cinfo);
e4eff1a6 3570 return 1;
1da177e4
LT		 3571}
3572
d3d4152a
JL		 3573static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3574{
3575 struct nfs_server *server = NFS_SERVER(dir);
3576 struct nfs_renameargs *arg = msg->rpc_argp;
3577 struct nfs_renameres *res = msg->rpc_resp;
3578
3579 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3580 res->server = server;
a9c92d6b 3581 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3582}
3583
c6bfa1a1
BS		 3584static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3585{
d9afbd1b
TM		 3586 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3587 &data->args.seq_args,
3588 &data->res.seq_res,
3589 task);
d3d4152a
JL		 3590}
3591
3592static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3593 struct inode *new_dir)
3594{
fbc6f7c2
TM		 3595 struct nfs_renamedata *data = task->tk_calldata;
3596 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3597
3598 if (!nfs4_sequence_done(task, &res->seq_res))
3599 return 0;
3600 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3601 return 0;
3602
3603 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3604 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3605 return 1;
3606}
3607
1da177e4
LT		 3608static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3609{
91ba2eee 3610 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3611 struct nfs4_link_arg arg = {
3612 .fh = NFS_FH(inode),
3613 .dir_fh = NFS_FH(dir),
3614 .name = name,
91ba2eee
TM		 3615 .bitmask = server->attr_bitmask,
3616 };
91ba2eee
TM		 3617 struct nfs4_link_res res = {
3618 .server = server,
1775fd3e 3619 .label = NULL,
1da177e4 3620 };
1da177e4
LT		 3621 struct rpc_message msg = {
3622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3623 .rpc_argp = &arg,
91ba2eee 3624 .rpc_resp = &res,
1da177e4 3625 };
136f2627
TM		 3626 int status = -ENOMEM;
3627
3628 res.fattr = nfs_alloc_fattr();
778d2817 3629 if (res.fattr == NULL)
136f2627 3630 goto out;
1da177e4 3631
14c43f76
DQ		 3632 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3633 if (IS_ERR(res.label)) {
3634 status = PTR_ERR(res.label);
3635 goto out;
3636 }
aa9c2669 3637 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3638
7c513058 3639 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3640 if (!status) {
3641 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3642 status = nfs_post_op_update_inode(inode, res.fattr);
3643 if (!status)
3644 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3645 }
14c43f76
DQ		 3646
3647
3648 nfs4_label_free(res.label);
3649
136f2627 3650out:
136f2627 3651 nfs_free_fattr(res.fattr);
1da177e4
LT		 3652 return status;
3653}
3654
3655static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3656{
3657 struct nfs4_exception exception = { };
3658 int err;
3659 do {
3660 err = nfs4_handle_exception(NFS_SERVER(inode),
3661 _nfs4_proc_link(inode, dir, name),
3662 &exception);
3663 } while (exception.retry);
3664 return err;
3665}
3666
57dc9a57
TM		 3667struct nfs4_createdata {
3668 struct rpc_message msg;
3669 struct nfs4_create_arg arg;
3670 struct nfs4_create_res res;
3671 struct nfs_fh fh;
3672 struct nfs_fattr fattr;
1775fd3e 3673 struct nfs4_label *label;
57dc9a57
TM		 3674};
3675
3676static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3677 struct qstr *name, struct iattr *sattr, u32 ftype)
3678{
3679 struct nfs4_createdata *data;
3680
3681 data = kzalloc(sizeof(*data), GFP_KERNEL);
3682 if (data != NULL) {
3683 struct nfs_server *server = NFS_SERVER(dir);
3684
14c43f76
DQ		 3685 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3686 if (IS_ERR(data->label))
3687 goto out_free;
3688
57dc9a57
TM		 3689 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3690 data->msg.rpc_argp = &data->arg;
3691 data->msg.rpc_resp = &data->res;
3692 data->arg.dir_fh = NFS_FH(dir);
3693 data->arg.server = server;
3694 data->arg.name = name;
3695 data->arg.attrs = sattr;
3696 data->arg.ftype = ftype;
aa9c2669 3697 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3698 data->res.server = server;
3699 data->res.fh = &data->fh;
3700 data->res.fattr = &data->fattr;
1775fd3e 3701 data->res.label = data->label;
57dc9a57 3702 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3703 }
3704 return data;
14c43f76
DQ		 3705out_free:
3706 kfree(data);
3707 return NULL;
57dc9a57
TM		 3708}
3709
3710static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3711{
7c513058 3712 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3713 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3714 if (status == 0) {
3715 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3716 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3717 }
3718 return status;
3719}
3720
3721static void nfs4_free_createdata(struct nfs4_createdata *data)
3722{
14c43f76 3723 nfs4_label_free(data->label);
57dc9a57
TM		 3724 kfree(data);
3725}
3726
4f390c15 3727static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3728 struct page *page, unsigned int len, struct iattr *sattr,
3729 struct nfs4_label *label)
1da177e4 3730{
57dc9a57
TM		 3731 struct nfs4_createdata *data;
3732 int status = -ENAMETOOLONG;
1da177e4 3733
94a6d753 3734 if (len > NFS4_MAXPATHLEN)
57dc9a57 3735 goto out;
4f390c15 3736
57dc9a57
TM		 3737 status = -ENOMEM;
3738 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3739 if (data == NULL)
3740 goto out;
3741
3742 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3743 data->arg.u.symlink.pages = &page;
3744 data->arg.u.symlink.len = len;
1775fd3e 3745 data->arg.label = label;
1da177e4 3746
57dc9a57
TM		 3747 status = nfs4_do_create(dir, dentry, data);
3748
3749 nfs4_free_createdata(data);
3750out:
1da177e4
LT		 3751 return status;
3752}
3753
4f390c15 3754static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3755 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3756{
3757 struct nfs4_exception exception = { };
aa9c2669 3758 struct nfs4_label l, *label = NULL;
1da177e4 3759 int err;
aa9c2669
DQ		 3760
3761 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3762
1da177e4 3763 do {
078ea3df
TM		 3764 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3765 trace_nfs4_symlink(dir, &dentry->d_name, err);
3766 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3767 &exception);
3768 } while (exception.retry);
aa9c2669
DQ		 3769
3770 nfs4_label_release_security(label);
1da177e4
LT		 3771 return err;
3772}
3773
3774static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3775 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3776{
57dc9a57
TM		 3777 struct nfs4_createdata *data;
3778 int status = -ENOMEM;
1da177e4 3779
57dc9a57
TM		 3780 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3781 if (data == NULL)
3782 goto out;
3783
1775fd3e 3784 data->arg.label = label;
57dc9a57
TM		 3785 status = nfs4_do_create(dir, dentry, data);
3786
3787 nfs4_free_createdata(data);
3788out:
1da177e4
LT		 3789 return status;
3790}
3791
3792static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3793 struct iattr *sattr)
3794{
3795 struct nfs4_exception exception = { };
aa9c2669 3796 struct nfs4_label l, *label = NULL;
1da177e4 3797 int err;
a8a5da99 3798
aa9c2669
DQ		 3799 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3800
a8a5da99 3801 sattr->ia_mode &= ~current_umask();
1da177e4 3802 do {
078ea3df
TM		 3803 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3804 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3805 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3806 &exception);
3807 } while (exception.retry);
aa9c2669
DQ		 3808 nfs4_label_release_security(label);
3809
1da177e4
LT		 3810 return err;
3811}
3812
3813static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3814 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3815{
3816 struct inode *dir = dentry->d_inode;
3817 struct nfs4_readdir_arg args = {
3818 .fh = NFS_FH(dir),
56e4ebf8 3819 .pages = pages,
1da177e4
LT		 3820 .pgbase = 0,
3821 .count = count,
96d25e53 3822 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3823 .plus = plus,
1da177e4
LT		 3824 };
3825 struct nfs4_readdir_res res;
3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3828 .rpc_argp = &args,
3829 .rpc_resp = &res,
3830 .rpc_cred = cred,
3831 };
3832 int status;
3833
6de1472f
AV		 3834 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3835 dentry,
eadf4598 3836 (unsigned long long)cookie);
c3f52af3 3837 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3838 res.pgbase = args.pgbase;
7c513058 3839 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3840 if (status >= 0) {
c3f52af3 3841 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3842 status += args.pgbase;
3843 }
c4812998
TM		 3844
3845 nfs_invalidate_atime(dir);
3846
3110ff80 3847 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3848 return status;
3849}
3850
3851static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3852 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3853{
3854 struct nfs4_exception exception = { };
3855 int err;
3856 do {
c1578b76
TM		 3857 err = _nfs4_proc_readdir(dentry, cred, cookie,
3858 pages, count, plus);
3859 trace_nfs4_readdir(dentry->d_inode, err);
3860 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3861 &exception);
3862 } while (exception.retry);
3863 return err;
3864}
3865
3866static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3867 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3868{
57dc9a57
TM		 3869 struct nfs4_createdata *data;
3870 int mode = sattr->ia_mode;
3871 int status = -ENOMEM;
1da177e4 3872
57dc9a57
TM		 3873 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3874 if (data == NULL)
3875 goto out;
3876
1da177e4 3877 if (S_ISFIFO(mode))
57dc9a57 3878 data->arg.ftype = NF4FIFO;
1da177e4 3879 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3880 data->arg.ftype = NF4BLK;
3881 data->arg.u.device.specdata1 = MAJOR(rdev);
3882 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3883 }
3884 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3885 data->arg.ftype = NF4CHR;
3886 data->arg.u.device.specdata1 = MAJOR(rdev);
3887 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3888 } else if (!S_ISSOCK(mode)) {
3889 status = -EINVAL;
3890 goto out_free;
1da177e4 3891 }
1775fd3e 3892
aa9c2669 3893 data->arg.label = label;
57dc9a57 3894 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3895out_free:
57dc9a57
TM		 3896 nfs4_free_createdata(data);
3897out:
1da177e4
LT		 3898 return status;
3899}
3900
3901static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3902 struct iattr *sattr, dev_t rdev)
3903{
3904 struct nfs4_exception exception = { };
aa9c2669 3905 struct nfs4_label l, *label = NULL;
1da177e4 3906 int err;
a8a5da99 3907
aa9c2669
DQ		 3908 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3909
a8a5da99 3910 sattr->ia_mode &= ~current_umask();
1da177e4 3911 do {
078ea3df
TM		 3912 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3913 trace_nfs4_mknod(dir, &dentry->d_name, err);
3914 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3915 &exception);
3916 } while (exception.retry);
aa9c2669
DQ		 3917
3918 nfs4_label_release_security(label);
3919
1da177e4
LT		 3920 return err;
3921}
3922
3923static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3924 struct nfs_fsstat *fsstat)
3925{
3926 struct nfs4_statfs_arg args = {
3927 .fh = fhandle,
3928 .bitmask = server->attr_bitmask,
3929 };
24ad148a
BH		 3930 struct nfs4_statfs_res res = {
3931 .fsstat = fsstat,
3932 };
1da177e4
LT		 3933 struct rpc_message msg = {
3934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3935 .rpc_argp = &args,
24ad148a 3936 .rpc_resp = &res,
1da177e4
LT		 3937 };
3938
0e574af1 3939 nfs_fattr_init(fsstat->fattr);
7c513058 3940 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3941}
3942
3943static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3944{
3945 struct nfs4_exception exception = { };
3946 int err;
3947 do {
3948 err = nfs4_handle_exception(server,
3949 _nfs4_proc_statfs(server, fhandle, fsstat),
3950 &exception);
3951 } while (exception.retry);
3952 return err;
3953}
3954
3955static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3956 struct nfs_fsinfo *fsinfo)
3957{
3958 struct nfs4_fsinfo_arg args = {
3959 .fh = fhandle,
3960 .bitmask = server->attr_bitmask,
3961 };
3dda5e43
BH		 3962 struct nfs4_fsinfo_res res = {
3963 .fsinfo = fsinfo,
3964 };
1da177e4
LT		 3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3967 .rpc_argp = &args,
3dda5e43 3968 .rpc_resp = &res,
1da177e4
LT		 3969 };
3970
7c513058 3971 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3972}
3973
3974static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3975{
3976 struct nfs4_exception exception = { };
83ca7f5a 3977 unsigned long now = jiffies;
1da177e4
LT		 3978 int err;
3979
3980 do {
83ca7f5a 3981 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3982 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3983 if (err == 0) {
3984 struct nfs_client *clp = server->nfs_client;
3985
3986 spin_lock(&clp->cl_lock);
3987 clp->cl_lease_time = fsinfo->lease_time * HZ;
3988 clp->cl_last_renewal = now;
3989 spin_unlock(&clp->cl_lock);
3990 break;
3991 }
3992 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3993 } while (exception.retry);
3994 return err;
3995}
3996
3997static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3998{
e38eb650
BS		 3999 int error;
4000
0e574af1 4001 nfs_fattr_init(fsinfo->fattr);
e38eb650 4002 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4003 if (error == 0) {
4004 /* block layout checks this! */
4005 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4006 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4007 }
e38eb650
BS		 4008
4009 return error;
1da177e4
LT		 4010}
4011
4012static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4013 struct nfs_pathconf *pathconf)
4014{
4015 struct nfs4_pathconf_arg args = {
4016 .fh = fhandle,
4017 .bitmask = server->attr_bitmask,
4018 };
d45b2989
BH		 4019 struct nfs4_pathconf_res res = {
4020 .pathconf = pathconf,
4021 };
1da177e4
LT		 4022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4024 .rpc_argp = &args,
d45b2989 4025 .rpc_resp = &res,
1da177e4
LT		 4026 };
4027
4028 /* None of the pathconf attributes are mandatory to implement */
4029 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4030 memset(pathconf, 0, sizeof(*pathconf));
4031 return 0;
4032 }
4033
0e574af1 4034 nfs_fattr_init(pathconf->fattr);
7c513058 4035 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4036}
4037
4038static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4039 struct nfs_pathconf *pathconf)
4040{
4041 struct nfs4_exception exception = { };
4042 int err;
4043
4044 do {
4045 err = nfs4_handle_exception(server,
4046 _nfs4_proc_pathconf(server, fhandle, pathconf),
4047 &exception);
4048 } while (exception.retry);
4049 return err;
4050}
4051
5521abfd 4052int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4053 const struct nfs_open_context *ctx,
4054 const struct nfs_lock_context *l_ctx,
4055 fmode_t fmode)
4056{
4057 const struct nfs_lockowner *lockowner = NULL;
4058
4059 if (l_ctx != NULL)
4060 lockowner = &l_ctx->lockowner;
5521abfd 4061 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4062}
4063EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4064
5521abfd
TM		 4065static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4066 const struct nfs_open_context *ctx,
4067 const struct nfs_lock_context *l_ctx,
4068 fmode_t fmode)
4069{
4070 nfs4_stateid current_stateid;
4071
e1253be0
TM		 4072 /* If the current stateid represents a lost lock, then exit */
4073 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4074 return true;
5521abfd
TM		 4075 return nfs4_stateid_match(stateid, &current_stateid);
4076}
4077
4078static bool nfs4_error_stateid_expired(int err)
4079{
4080 switch (err) {
4081 case -NFS4ERR_DELEG_REVOKED:
4082 case -NFS4ERR_ADMIN_REVOKED:
4083 case -NFS4ERR_BAD_STATEID:
4084 case -NFS4ERR_STALE_STATEID:
4085 case -NFS4ERR_OLD_STATEID:
4086 case -NFS4ERR_OPENMODE:
4087 case -NFS4ERR_EXPIRED:
4088 return true;
4089 }
4090 return false;
4091}
4092
d45f60c6 4093void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4094{
d45f60c6 4095 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4096}
4097
d45f60c6 4098static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4099{
d45f60c6 4100 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4101
d45f60c6
WAA		 4102 trace_nfs4_read(hdr, task->tk_status);
4103 if (nfs4_async_handle_error(task, server,
4104 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4105 rpc_restart_call_prepare(task);
ec06c096 4106 return -EAGAIN;
1da177e4 4107 }
8850df99 4108
d45f60c6 4109 __nfs4_read_done_cb(hdr);
1da177e4 4110 if (task->tk_status > 0)
d45f60c6 4111 renew_lease(server, hdr->timestamp);
ec06c096 4112 return 0;
1da177e4
LT		 4113}
4114
5521abfd 4115static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4116 struct nfs_pgio_args *args)
5521abfd
TM		 4117{
4118
4119 if (!nfs4_error_stateid_expired(task->tk_status) ||
4120 nfs4_stateid_is_current(&args->stateid,
4121 args->context,
4122 args->lock_context,
4123 FMODE_READ))
4124 return false;
4125 rpc_restart_call_prepare(task);
4126 return true;
4127}
4128
d45f60c6 4129static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4130{
4131
4132 dprintk("--> %s\n", __func__);
4133
d45f60c6 4134 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4135 return -EAGAIN;
d45f60c6 4136 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4137 return -EAGAIN;
d45f60c6
WAA		 4138 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4139 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4140}
4141
d45f60c6
WAA		 4142static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4143 struct rpc_message *msg)
1da177e4 4144{
d45f60c6
WAA		 4145 hdr->timestamp = jiffies;
4146 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4147 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4148 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4149}
4150
d45f60c6
WAA		 4151static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4152 struct nfs_pgio_header *hdr)
ea7c3303 4153{
d45f60c6
WAA		 4154 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4155 &hdr->args.seq_args,
4156 &hdr->res.seq_res,
9b206149 4157 task))
ef1820f9 4158 return 0;
d45f60c6
WAA		 4159 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4160 hdr->args.lock_context,
4161 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4162 return -EIO;
d45f60c6 4163 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4164 return -EIO;
4165 return 0;
1da177e4
LT		 4166}
4167
d45f60c6
WAA		 4168static int nfs4_write_done_cb(struct rpc_task *task,
4169 struct nfs_pgio_header *hdr)
1da177e4 4170{
d45f60c6 4171 struct inode *inode = hdr->inode;
1da177e4 4172
d45f60c6
WAA		 4173 trace_nfs4_write(hdr, task->tk_status);
4174 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4175 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4176 rpc_restart_call_prepare(task);
788e7a89 4177 return -EAGAIN;
1da177e4 4178 }
4f9838c7 4179 if (task->tk_status >= 0) {
d45f60c6
WAA		 4180 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4181 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4182 }
788e7a89 4183 return 0;
1da177e4
LT		 4184}
4185
5521abfd 4186static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4187 struct nfs_pgio_args *args)
5521abfd
TM		 4188{
4189
4190 if (!nfs4_error_stateid_expired(task->tk_status) ||
4191 nfs4_stateid_is_current(&args->stateid,
4192 args->context,
4193 args->lock_context,
4194 FMODE_WRITE))
4195 return false;
4196 rpc_restart_call_prepare(task);
4197 return true;
4198}
4199
d45f60c6 4200static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4201{
d45f60c6 4202 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4203 return -EAGAIN;
d45f60c6 4204 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4205 return -EAGAIN;
d45f60c6
WAA		 4206 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4207 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4208}
4209
5a37f851 4210static
d45f60c6 4211bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4212{
5a37f851 4213 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4214 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4215 return false;
4216 /* Otherwise, request attributes if and only if we don't hold
4217 * a delegation
4218 */
011e2a7f 4219 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4220}
a69aef14 4221
d45f60c6
WAA		 4222static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4223 struct rpc_message *msg)
1da177e4 4224{
d45f60c6 4225 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4226
d45f60c6
WAA		 4227 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4228 hdr->args.bitmask = NULL;
4229 hdr->res.fattr = NULL;
7ffd1064 4230 } else
d45f60c6 4231 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4232
d45f60c6
WAA		 4233 if (!hdr->pgio_done_cb)
4234 hdr->pgio_done_cb = nfs4_write_done_cb;
4235 hdr->res.server = server;
4236 hdr->timestamp = jiffies;
1da177e4 4237
bdc7f021 4238 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4239 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4240}
4241
0b7c0153 4242static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4243{
d9afbd1b
TM		 4244 nfs4_setup_sequence(NFS_SERVER(data->inode),
4245 &data->args.seq_args,
4246 &data->res.seq_res,
4247 task);
1da177e4
LT		 4248}
4249
0b7c0153 4250static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4251{
1da177e4 4252 struct inode *inode = data->inode;
14516c3a 4253
cc668ab3 4254 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4255 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4256 rpc_restart_call_prepare(task);
788e7a89 4257 return -EAGAIN;
1da177e4 4258 }
788e7a89 4259 return 0;
1da177e4
LT		 4260}
4261
0b7c0153 4262static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4263{
4264 if (!nfs4_sequence_done(task, &data->res.seq_res))
4265 return -EAGAIN;
0b7c0153 4266 return data->commit_done_cb(task, data);
5f452431
FI		 4267}
4268
0b7c0153 4269static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4270{
788e7a89 4271 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4272
0b7c0153
FI		 4273 if (data->commit_done_cb == NULL)
4274 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4275 data->res.server = server;
bdc7f021 4276 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4277 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4278}
4279
9bc4e3ca
CL		 4280struct nfs4_renewdata {
4281 struct nfs_client *client;
4282 unsigned long timestamp;
4283};
4284
1da177e4
LT		 4285/*
4286 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4287 * standalone procedure for queueing an asynchronous RENEW.
4288 */
9bc4e3ca 4289static void nfs4_renew_release(void *calldata)
dc96aef9 4290{
9bc4e3ca
CL		 4291 struct nfs4_renewdata *data = calldata;
4292 struct nfs_client *clp = data->client;
dc96aef9 4293
0851de06
AB		 4294 if (atomic_read(&clp->cl_count) > 1)
4295 nfs4_schedule_state_renewal(clp);
4296 nfs_put_client(clp);
9bc4e3ca 4297 kfree(data);
dc96aef9
AB		 4298}
4299
9bc4e3ca 4300static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4301{
9bc4e3ca
CL		 4302 struct nfs4_renewdata *data = calldata;
4303 struct nfs_client *clp = data->client;
4304 unsigned long timestamp = data->timestamp;
1da177e4 4305
c6d01c6f 4306 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4307 switch (task->tk_status) {
4308 case 0:
4309 break;
4310 case -NFS4ERR_LEASE_MOVED:
4311 nfs4_schedule_lease_moved_recovery(clp);
4312 break;
4313 default:
95baa25c 4314 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4315 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4316 return;
4317 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4318 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4319 return;
4320 }
4321 nfs4_schedule_path_down_recovery(clp);
1da177e4 4322 }
452e9352 4323 do_renew_lease(clp, timestamp);
1da177e4
LT		 4324}
4325
963d8fe5
TM		 4326static const struct rpc_call_ops nfs4_renew_ops = {
4327 .rpc_call_done = nfs4_renew_done,
dc96aef9 4328 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4329};
4330
2f60ea6b 4331static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4332{
4333 struct rpc_message msg = {
4334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4335 .rpc_argp = clp,
b4454fe1 4336 .rpc_cred = cred,
1da177e4 4337 };
9bc4e3ca 4338 struct nfs4_renewdata *data;
1da177e4 4339
2f60ea6b
TM		 4340 if (renew_flags == 0)
4341 return 0;
0851de06
AB		 4342 if (!atomic_inc_not_zero(&clp->cl_count))
4343 return -EIO;
b569ad34 4344 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4345 if (data == NULL)
4346 return -ENOMEM;
4347 data->client = clp;
4348 data->timestamp = jiffies;
bc7a05ca 4349 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4350 &nfs4_renew_ops, data);
1da177e4
LT		 4351}
4352
8534d4ec 4353static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4354{
4355 struct rpc_message msg = {
4356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4357 .rpc_argp = clp,
b4454fe1 4358 .rpc_cred = cred,
1da177e4
LT		 4359 };
4360 unsigned long now = jiffies;
4361 int status;
4362
bc7a05ca 4363 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4364 if (status < 0)
4365 return status;
452e9352 4366 do_renew_lease(clp, now);
1da177e4
LT		 4367 return 0;
4368}
4369
aa1870af
BF		 4370static inline int nfs4_server_supports_acls(struct nfs_server *server)
4371{
7dd7d959 4372 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4373}
4374
21f498c2
TM		 4375/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4376 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4377 * the stack.
4378 */
21f498c2 4379#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4380
e9e3d724
NH		 4381static int buf_to_pages_noslab(const void *buf, size_t buflen,
4382 struct page **pages, unsigned int *pgbase)
4383{
4384 struct page *newpage, **spages;
4385 int rc = 0;
4386 size_t len;
4387 spages = pages;
4388
4389 do {
21f498c2 4390 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4391 newpage = alloc_page(GFP_KERNEL);
4392
4393 if (newpage == NULL)
4394 goto unwind;
4395 memcpy(page_address(newpage), buf, len);
4396 buf += len;
4397 buflen -= len;
4398 *pages++ = newpage;
4399 rc++;
4400 } while (buflen != 0);
4401
4402 return rc;
4403
4404unwind:
4405 for(; rc > 0; rc--)
4406 __free_page(spages[rc-1]);
4407 return -ENOMEM;
4408}
4409
e50a1c2e
BF		 4410struct nfs4_cached_acl {
4411 int cached;
4412 size_t len;
3e9d4154 4413 char data[0];
e50a1c2e
BF		 4414};
4415
4416static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4417{
4418 struct nfs_inode *nfsi = NFS_I(inode);
4419
4420 spin_lock(&inode->i_lock);
4421 kfree(nfsi->nfs4_acl);
4422 nfsi->nfs4_acl = acl;
4423 spin_unlock(&inode->i_lock);
4424}
4425
4426static void nfs4_zap_acl_attr(struct inode *inode)
4427{
4428 nfs4_set_cached_acl(inode, NULL);
4429}
4430
4431static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4432{
4433 struct nfs_inode *nfsi = NFS_I(inode);
4434 struct nfs4_cached_acl *acl;
4435 int ret = -ENOENT;
4436
4437 spin_lock(&inode->i_lock);
4438 acl = nfsi->nfs4_acl;
4439 if (acl == NULL)
4440 goto out;
4441 if (buf == NULL) /* user is just asking for length */
4442 goto out_len;
4443 if (acl->cached == 0)
4444 goto out;
4445 ret = -ERANGE; /* see getxattr(2) man page */
4446 if (acl->len > buflen)
4447 goto out;
4448 memcpy(buf, acl->data, acl->len);
4449out_len:
4450 ret = acl->len;
4451out:
4452 spin_unlock(&inode->i_lock);
4453 return ret;
4454}
4455
5794d21e 4456static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4457{
4458 struct nfs4_cached_acl *acl;
b291f1b1 4459 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4460
1f1ea6c2 4461 if (buflen <= PAGE_SIZE) {
b291f1b1 4462 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4463 if (acl == NULL)
4464 goto out;
4465 acl->cached = 1;
5794d21e 4466 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4467 } else {
4468 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4469 if (acl == NULL)
4470 goto out;
4471 acl->cached = 0;
4472 }
4473 acl->len = acl_len;
4474out:
4475 nfs4_set_cached_acl(inode, acl);
4476}
4477
bf118a34
AA		 4478/*
4479 * The getxattr API returns the required buffer length when called with a
4480 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4481 * the required buf. On a NULL buf, we send a page of data to the server
4482 * guessing that the ACL request can be serviced by a page. If so, we cache
4483 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4484 * the cache. If not so, we throw away the page, and cache the required
4485 * length. The next getxattr call will then produce another round trip to
4486 * the server, this time with the input buf of the required size.
4487 */
16b4289c 4488static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4489{
bf118a34 4490 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4491 struct nfs_getaclargs args = {
4492 .fh = NFS_FH(inode),
4493 .acl_pages = pages,
4494 .acl_len = buflen,
4495 };
663c79b3
BH		 4496 struct nfs_getaclres res = {
4497 .acl_len = buflen,
4498 };
aa1870af
BF		 4499 struct rpc_message msg = {
4500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4501 .rpc_argp = &args,
663c79b3 4502 .rpc_resp = &res,
aa1870af 4503 };
21f498c2
TM		 4504 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4505 int ret = -ENOMEM, i;
aa1870af 4506
bf118a34
AA		 4507 /* As long as we're doing a round trip to the server anyway,
4508 * let's be prepared for a page of acl data. */
4509 if (npages == 0)
4510 npages = 1;
21f498c2
TM		 4511 if (npages > ARRAY_SIZE(pages))
4512 return -ERANGE;
5a006899 4513
bf118a34
AA		 4514 for (i = 0; i < npages; i++) {
4515 pages[i] = alloc_page(GFP_KERNEL);
4516 if (!pages[i])
4517 goto out_free;
e50a1c2e 4518 }
5a006899
SP		 4519
4520 /* for decoding across pages */
4521 res.acl_scratch = alloc_page(GFP_KERNEL);
4522 if (!res.acl_scratch)
4523 goto out_free;
4524
bf118a34
AA		 4525 args.acl_len = npages * PAGE_SIZE;
4526 args.acl_pgbase = 0;
5a006899 4527
de040bec 4528 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4529 __func__, buf, buflen, npages, args.acl_len);
4530 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4531 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4532 if (ret)
4533 goto out_free;
bf118a34 4534
1f1ea6c2
TM		 4535 /* Handle the case where the passed-in buffer is too short */
4536 if (res.acl_flags & NFS4_ACL_TRUNC) {
4537 /* Did the user only issue a request for the acl length? */
4538 if (buf == NULL)
4539 goto out_ok;
e50a1c2e 4540 ret = -ERANGE;
1f1ea6c2 4541 goto out_free;
e50a1c2e 4542 }
1f1ea6c2 4543 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4544 if (buf) {
4545 if (res.acl_len > buflen) {
4546 ret = -ERANGE;
4547 goto out_free;
4548 }
1f1ea6c2 4549 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4550 }
1f1ea6c2
TM		 4551out_ok:
4552 ret = res.acl_len;
e50a1c2e 4553out_free:
bf118a34
AA		 4554 for (i = 0; i < npages; i++)
4555 if (pages[i])
4556 __free_page(pages[i]);
331818f1
TM		 4557 if (res.acl_scratch)
4558 __free_page(res.acl_scratch);
aa1870af
BF		 4559 return ret;
4560}
4561
16b4289c
TM		 4562static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4563{
4564 struct nfs4_exception exception = { };
4565 ssize_t ret;
4566 do {
4567 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4568 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4569 if (ret >= 0)
4570 break;
4571 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4572 } while (exception.retry);
4573 return ret;
4574}
4575
e50a1c2e
BF		 4576static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4577{
4578 struct nfs_server *server = NFS_SERVER(inode);
4579 int ret;
4580
4581 if (!nfs4_server_supports_acls(server))
4582 return -EOPNOTSUPP;
4583 ret = nfs_revalidate_inode(server, inode);
4584 if (ret < 0)
4585 return ret;
08a22b39
AK		 4586 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4587 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4588 ret = nfs4_read_cached_acl(inode, buf, buflen);
4589 if (ret != -ENOENT)
bf118a34
AA		 4590 /* -ENOENT is returned if there is no ACL or if there is an ACL
4591 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4592 return ret;
4593 return nfs4_get_acl_uncached(inode, buf, buflen);
4594}
4595
16b4289c 4596static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4597{
4598 struct nfs_server *server = NFS_SERVER(inode);
4599 struct page *pages[NFS4ACL_MAXPAGES];
4600 struct nfs_setaclargs arg = {
4601 .fh = NFS_FH(inode),
4602 .acl_pages = pages,
4603 .acl_len = buflen,
4604 };
73c403a9 4605 struct nfs_setaclres res;
4b580ee3
BF		 4606 struct rpc_message msg = {
4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4608 .rpc_argp = &arg,
73c403a9 4609 .rpc_resp = &res,
4b580ee3 4610 };
21f498c2 4611 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4612 int ret, i;
4b580ee3
BF		 4613
4614 if (!nfs4_server_supports_acls(server))
4615 return -EOPNOTSUPP;
21f498c2
TM		 4616 if (npages > ARRAY_SIZE(pages))
4617 return -ERANGE;
e9e3d724
NH		 4618 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4619 if (i < 0)
4620 return i;
57ec14c5 4621 nfs4_inode_return_delegation(inode);
7c513058 4622 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4623
4624 /*
4625 * Free each page after tx, so the only ref left is
4626 * held by the network stack
4627 */
4628 for (; i > 0; i--)
4629 put_page(pages[i-1]);
4630
08a22b39
AK		 4631 /*
4632 * Acl update can result in inode attribute update.
4633 * so mark the attribute cache invalid.
4634 */
4635 spin_lock(&inode->i_lock);
4636 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4637 spin_unlock(&inode->i_lock);
f41f7418
TM		 4638 nfs_access_zap_cache(inode);
4639 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4640 return ret;
4641}
4642
16b4289c
TM		 4643static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4644{
4645 struct nfs4_exception exception = { };
4646 int err;
4647 do {
c1578b76
TM		 4648 err = __nfs4_proc_set_acl(inode, buf, buflen);
4649 trace_nfs4_set_acl(inode, err);
4650 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4651 &exception);
4652 } while (exception.retry);
4653 return err;
4654}
4655
aa9c2669
DQ		 4656#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4657static int _nfs4_get_security_label(struct inode *inode, void *buf,
4658 size_t buflen)
4659{
4660 struct nfs_server *server = NFS_SERVER(inode);
4661 struct nfs_fattr fattr;
4662 struct nfs4_label label = {0, 0, buflen, buf};
4663
4664 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4665 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4666 .fh = NFS_FH(inode),
4667 .bitmask = bitmask,
4668 };
4669 struct nfs4_getattr_res res = {
4670 .fattr = &fattr,
4671 .label = &label,
4672 .server = server,
4673 };
4674 struct rpc_message msg = {
4675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4676 .rpc_argp = &arg,
aa9c2669
DQ		 4677 .rpc_resp = &res,
4678 };
4679 int ret;
4680
4681 nfs_fattr_init(&fattr);
4682
fcb63a9b 4683 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4684 if (ret)
4685 return ret;
4686 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4687 return -ENOENT;
4688 if (buflen < label.len)
4689 return -ERANGE;
4690 return 0;
4691}
4692
4693static int nfs4_get_security_label(struct inode *inode, void *buf,
4694 size_t buflen)
4695{
4696 struct nfs4_exception exception = { };
4697 int err;
4698
4699 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4700 return -EOPNOTSUPP;
4701
4702 do {
c1578b76
TM		 4703 err = _nfs4_get_security_label(inode, buf, buflen);
4704 trace_nfs4_get_security_label(inode, err);
4705 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4706 &exception);
4707 } while (exception.retry);
4708 return err;
4709}
4710
4711static int _nfs4_do_set_security_label(struct inode *inode,
4712 struct nfs4_label *ilabel,
4713 struct nfs_fattr *fattr,
4714 struct nfs4_label *olabel)
4715{
4716
4717 struct iattr sattr = {0};
4718 struct nfs_server *server = NFS_SERVER(inode);
4719 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4720 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4721 .fh = NFS_FH(inode),
4722 .iap = &sattr,
4723 .server = server,
4724 .bitmask = bitmask,
4725 .label = ilabel,
4726 };
4727 struct nfs_setattrres res = {
4728 .fattr = fattr,
4729 .label = olabel,
4730 .server = server,
4731 };
4732 struct rpc_message msg = {
4733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4734 .rpc_argp = &arg,
aa9c2669
DQ		 4735 .rpc_resp = &res,
4736 };
4737 int status;
4738
12207f69 4739 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4740
12207f69 4741 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4742 if (status)
4743 dprintk("%s failed: %d\n", __func__, status);
4744
4745 return status;
4746}
4747
4748static int nfs4_do_set_security_label(struct inode *inode,
4749 struct nfs4_label *ilabel,
4750 struct nfs_fattr *fattr,
4751 struct nfs4_label *olabel)
4752{
4753 struct nfs4_exception exception = { };
4754 int err;
4755
4756 do {
c1578b76
TM		 4757 err = _nfs4_do_set_security_label(inode, ilabel,
4758 fattr, olabel);
4759 trace_nfs4_set_security_label(inode, err);
4760 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4761 &exception);
4762 } while (exception.retry);
4763 return err;
4764}
4765
4766static int
4767nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4768{
4769 struct nfs4_label ilabel, *olabel = NULL;
4770 struct nfs_fattr fattr;
4771 struct rpc_cred *cred;
4772 struct inode *inode = dentry->d_inode;
4773 int status;
4774
4775 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4776 return -EOPNOTSUPP;
4777
4778 nfs_fattr_init(&fattr);
4779
4780 ilabel.pi = 0;
4781 ilabel.lfs = 0;
4782 ilabel.label = (char *)buf;
4783 ilabel.len = buflen;
4784
4785 cred = rpc_lookup_cred();
4786 if (IS_ERR(cred))
4787 return PTR_ERR(cred);
4788
4789 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4790 if (IS_ERR(olabel)) {
4791 status = -PTR_ERR(olabel);
4792 goto out;
4793 }
4794
4795 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4796 if (status == 0)
4797 nfs_setsecurity(inode, &fattr, olabel);
4798
4799 nfs4_label_free(olabel);
4800out:
4801 put_rpccred(cred);
4802 return status;
4803}
4804#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4805
4806
1da177e4 4807static int
aa5190d0 4808nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4809{
aa5190d0
TM		 4810 struct nfs_client *clp = server->nfs_client;
4811
4812 if (task->tk_status >= 0)
1da177e4
LT		 4813 return 0;
4814 switch(task->tk_status) {
a1d0b5ee 4815 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4816 case -NFS4ERR_ADMIN_REVOKED:
4817 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4818 if (state == NULL)
4819 break;
4820 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4821 case -NFS4ERR_OPENMODE:
4822 if (state == NULL)
4823 break;
5d422301 4824 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4825 goto recovery_failed;
0400a6b0 4826 goto wait_on_recovery;
0ced63d1 4827 case -NFS4ERR_EXPIRED:
5d422301
TM		 4828 if (state != NULL) {
4829 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4830 goto recovery_failed;
5d422301 4831 }
1da177e4 4832 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4833 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4834 nfs4_schedule_lease_recovery(clp);
4835 goto wait_on_recovery;
519ae255
CL		 4836 case -NFS4ERR_MOVED:
4837 if (nfs4_schedule_migration_recovery(server) < 0)
4838 goto recovery_failed;
4839 goto wait_on_recovery;
8ef2f8d4
CL		 4840 case -NFS4ERR_LEASE_MOVED:
4841 nfs4_schedule_lease_moved_recovery(clp);
4842 goto wait_on_recovery;
4745e315
AA		 4843#if defined(CONFIG_NFS_V4_1)
4844 case -NFS4ERR_BADSESSION:
4845 case -NFS4ERR_BADSLOT:
4846 case -NFS4ERR_BAD_HIGH_SLOT:
4847 case -NFS4ERR_DEADSESSION:
4848 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4849 case -NFS4ERR_SEQ_FALSE_RETRY:
4850 case -NFS4ERR_SEQ_MISORDERED:
4851 dprintk("%s ERROR %d, Reset session\n", __func__,
4852 task->tk_status);
9f594791 4853 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4854 goto wait_on_recovery;
4745e315 4855#endif /* CONFIG_NFS_V4_1 */
1da177e4 4856 case -NFS4ERR_DELAY:
aa5190d0 4857 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4858 case -NFS4ERR_GRACE:
1da177e4 4859 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4860 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4861 case -NFS4ERR_OLD_STATEID:
f1478c13 4862 goto restart_call;
1da177e4
LT		 4863 }
4864 task->tk_status = nfs4_map_errors(task->tk_status);
4865 return 0;
9f51a78e 4866recovery_failed:
5d422301
TM		 4867 task->tk_status = -EIO;
4868 return 0;
0400a6b0 4869wait_on_recovery:
a2c0b9e2 4870 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4871 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4872 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4873 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4874 goto recovery_failed;
f1478c13 4875restart_call:
a2c0b9e2
TM		 4876 task->tk_status = 0;
4877 return -EAGAIN;
1da177e4
LT		 4878}
4879
f092075d
CL		 4880static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4881 nfs4_verifier *bootverf)
cd93710e
CL		 4882{
4883 __be32 verf[2];
4884
2c820d9a
CL		 4885 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4886 /* An impossible timestamp guarantees this value
4887 * will never match a generated boot time. */
4888 verf[0] = 0;
17f26b12 4889 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4890 } else {
f092075d 4891 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4892 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4893 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4894 }
cd93710e
CL		 4895 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4896}
4897
e984a55a
CL		 4898static unsigned int
4899nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4900 char *buf, size_t len)
4901{
4902 unsigned int result;
4903
4904 rcu_read_lock();
4905 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4906 clp->cl_ipaddr,
4907 rpc_peeraddr2str(clp->cl_rpcclient,
4908 RPC_DISPLAY_ADDR),
4909 rpc_peeraddr2str(clp->cl_rpcclient,
4910 RPC_DISPLAY_PROTO));
4911 rcu_read_unlock();
4912 return result;
4913}
4914
4915static unsigned int
4916nfs4_init_uniform_client_string(const struct nfs_client *clp,
4917 char *buf, size_t len)
4918{
55b59293 4919 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4920
4921 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4922 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4923 clp->rpc_ops->version,
4924 clp->cl_minorversion,
4925 nfs4_client_id_uniquifier,
4926 nodename);
e984a55a
CL		 4927 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4928 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4929 nodename);
e984a55a
CL		 4930}
4931
706cb8db
CL		 4932/*
4933 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4934 * services. Advertise one based on the address family of the
4935 * clientaddr.
4936 */
4937static unsigned int
4938nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4939{
4940 if (strchr(clp->cl_ipaddr, ':') != NULL)
4941 return scnprintf(buf, len, "tcp6");
4942 else
4943 return scnprintf(buf, len, "tcp");
4944}
4945
f11b2a1c
JL		 4946static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4947{
4948 struct nfs4_setclientid *sc = calldata;
4949
4950 if (task->tk_status == 0)
4951 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4952}
4953
4954static const struct rpc_call_ops nfs4_setclientid_ops = {
4955 .rpc_call_done = nfs4_setclientid_done,
4956};
4957
6bbb4ae8
CL		 4958/**
4959 * nfs4_proc_setclientid - Negotiate client ID
4960 * @clp: state data structure
4961 * @program: RPC program for NFSv4 callback service
4962 * @port: IP port number for NFS4 callback service
4963 * @cred: RPC credential to use for this call
4964 * @res: where to place the result
4965 *
4966 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4967 */
bb8b27e5
TM		 4968int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4969 unsigned short port, struct rpc_cred *cred,
4970 struct nfs4_setclientid_res *res)
1da177e4
LT		 4971{
4972 nfs4_verifier sc_verifier;
4973 struct nfs4_setclientid setclientid = {
4974 .sc_verifier = &sc_verifier,
4975 .sc_prog = program,
f4eecd5d 4976 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4977 };
4978 struct rpc_message msg = {
4979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4980 .rpc_argp = &setclientid,
bb8b27e5 4981 .rpc_resp = res,
286d7d6a 4982 .rpc_cred = cred,
1da177e4 4983 };
f11b2a1c
JL		 4984 struct rpc_task *task;
4985 struct rpc_task_setup task_setup_data = {
4986 .rpc_client = clp->cl_rpcclient,
4987 .rpc_message = &msg,
4988 .callback_ops = &nfs4_setclientid_ops,
4989 .callback_data = &setclientid,
4990 .flags = RPC_TASK_TIMEOUT,
4991 };
6bbb4ae8 4992 int status;
1da177e4 4993
de734831 4994 /* nfs_client_id4 */
f092075d 4995 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4996 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4997 setclientid.sc_name_len =
4998 nfs4_init_uniform_client_string(clp,
4999 setclientid.sc_name,
5000 sizeof(setclientid.sc_name));
5001 else
5002 setclientid.sc_name_len =
5003 nfs4_init_nonuniform_client_string(clp,
5004 setclientid.sc_name,
5005 sizeof(setclientid.sc_name));
de734831 5006 /* cb_client4 */
706cb8db
CL		 5007 setclientid.sc_netid_len =
5008 nfs4_init_callback_netid(clp,
5009 setclientid.sc_netid,
5010 sizeof(setclientid.sc_netid));
de734831 5011 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5012 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5013 clp->cl_ipaddr, port >> 8, port & 255);
5014
6bbb4ae8
CL		 5015 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5016 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5017 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5018 task = rpc_run_task(&task_setup_data);
5019 if (IS_ERR(task)) {
5020 status = PTR_ERR(task);
5021 goto out;
5022 }
5023 status = task->tk_status;
5024 if (setclientid.sc_cred) {
5025 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5026 put_rpccred(setclientid.sc_cred);
5027 }
5028 rpc_put_task(task);
5029out:
c6d01c6f 5030 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5031 dprintk("NFS reply setclientid: %d\n", status);
5032 return status;
1da177e4
LT		 5033}
5034
6bbb4ae8
CL		 5035/**
5036 * nfs4_proc_setclientid_confirm - Confirm client ID
5037 * @clp: state data structure
5038 * @res: result of a previous SETCLIENTID
5039 * @cred: RPC credential to use for this call
5040 *
5041 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5042 */
fd954ae1 5043int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5044 struct nfs4_setclientid_res *arg,
5045 struct rpc_cred *cred)
1da177e4 5046{
1da177e4
LT		 5047 struct rpc_message msg = {
5048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5049 .rpc_argp = arg,
286d7d6a 5050 .rpc_cred = cred,
1da177e4 5051 };
1da177e4
LT		 5052 int status;
5053
6bbb4ae8
CL		 5054 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5055 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5056 clp->cl_clientid);
1bd714f2 5057 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5058 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5059 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5060 return status;
5061}
5062
fe650407
TM		 5063struct nfs4_delegreturndata {
5064 struct nfs4_delegreturnargs args;
fa178f29 5065 struct nfs4_delegreturnres res;
fe650407
TM		 5066 struct nfs_fh fh;
5067 nfs4_stateid stateid;
26e976a8 5068 unsigned long timestamp;
fa178f29 5069 struct nfs_fattr fattr;
fe650407 5070 int rpc_status;
039b756a
PT		 5071 struct inode *inode;
5072 bool roc;
5073 u32 roc_barrier;
fe650407
TM		 5074};
5075
fe650407
TM		 5076static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5077{
5078 struct nfs4_delegreturndata *data = calldata;
938e1010 5079
14516c3a
TM		 5080 if (!nfs4_sequence_done(task, &data->res.seq_res))
5081 return;
938e1010 5082
ca8acf8d 5083 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5084 switch (task->tk_status) {
79708861 5085 case 0:
fa178f29 5086 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5087 case -NFS4ERR_ADMIN_REVOKED:
5088 case -NFS4ERR_DELEG_REVOKED:
5089 case -NFS4ERR_BAD_STATEID:
5090 case -NFS4ERR_OLD_STATEID:
5091 case -NFS4ERR_STALE_STATEID:
5092 case -NFS4ERR_EXPIRED:
5093 task->tk_status = 0;
039b756a
PT		 5094 if (data->roc)
5095 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5096 break;
79708861
RL		 5097 default:
5098 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5099 -EAGAIN) {
d00c5d43 5100 rpc_restart_call_prepare(task);
79708861
RL		 5101 return;
5102 }
5103 }
5104 data->rpc_status = task->tk_status;
fe650407
TM		 5105}
5106
5107static void nfs4_delegreturn_release(void *calldata)
5108{
039b756a
PT		 5109 struct nfs4_delegreturndata *data = calldata;
5110
5111 if (data->roc)
5112 pnfs_roc_release(data->inode);
fe650407
TM		 5113 kfree(calldata);
5114}
5115
938e1010
AA		 5116static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5117{
5118 struct nfs4_delegreturndata *d_data;
5119
5120 d_data = (struct nfs4_delegreturndata *)data;
5121
039b756a
PT		 5122 if (d_data->roc &&
5123 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5124 return;
5125
d9afbd1b
TM		 5126 nfs4_setup_sequence(d_data->res.server,
5127 &d_data->args.seq_args,
5128 &d_data->res.seq_res,
5129 task);
938e1010 5130}
938e1010 5131
c8d149f3 5132static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5133 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5134 .rpc_call_done = nfs4_delegreturn_done,
5135 .rpc_release = nfs4_delegreturn_release,
5136};
5137
e6f81075 5138static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5139{
5140 struct nfs4_delegreturndata *data;
fa178f29 5141 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5142 struct rpc_task *task;
5138fde0
TM		 5143 struct rpc_message msg = {
5144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5145 .rpc_cred = cred,
5146 };
c970aa85
TM		 5147 struct rpc_task_setup task_setup_data = {
5148 .rpc_client = server->client,
5138fde0 5149 .rpc_message = &msg,
c970aa85
TM		 5150 .callback_ops = &nfs4_delegreturn_ops,
5151 .flags = RPC_TASK_ASYNC,
5152 };
e6f81075 5153 int status = 0;
fe650407 5154
8535b2be 5155 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5156 if (data == NULL)
5157 return -ENOMEM;
a9c92d6b 5158 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5159 data->args.fhandle = &data->fh;
5160 data->args.stateid = &data->stateid;
9e907fec 5161 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5162 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5163 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5164 data->res.fattr = &data->fattr;
5165 data->res.server = server;
5138fde0 5166 nfs_fattr_init(data->res.fattr);
26e976a8 5167 data->timestamp = jiffies;
fe650407 5168 data->rpc_status = 0;
039b756a
PT		 5169 data->inode = inode;
5170 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5171 pnfs_roc(inode) : false;
fe650407 5172
c970aa85 5173 task_setup_data.callback_data = data;
1174dd1f
TM		 5174 msg.rpc_argp = &data->args;
5175 msg.rpc_resp = &data->res;
c970aa85 5176 task = rpc_run_task(&task_setup_data);
7a1218a2 5177 if (IS_ERR(task))
fe650407 5178 return PTR_ERR(task);
e6f81075
TM		 5179 if (!issync)
5180 goto out;
fe650407 5181 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5182 if (status != 0)
5183 goto out;
5184 status = data->rpc_status;
e144cbcc
TM		 5185 if (status == 0)
5186 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5187 else
5188 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5189out:
e6b3c4db 5190 rpc_put_task(task);
fe650407 5191 return status;
1da177e4
LT		 5192}
5193
e6f81075 5194int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5195{
5196 struct nfs_server *server = NFS_SERVER(inode);
5197 struct nfs4_exception exception = { };
5198 int err;
5199 do {
e6f81075 5200 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5201 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5202 switch (err) {
5203 case -NFS4ERR_STALE_STATEID:
5204 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5205 case 0:
5206 return 0;
5207 }
5208 err = nfs4_handle_exception(server, err, &exception);
5209 } while (exception.retry);
5210 return err;
5211}
5212
5213#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5214#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5215
5216/*
5217 * sleep, with exponential backoff, and retry the LOCK operation.
5218 */
5219static unsigned long
5220nfs4_set_lock_task_retry(unsigned long timeout)
5221{
416ad3c9 5222 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5223 timeout <<= 1;
5224 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5225 return NFS4_LOCK_MAXTIMEOUT;
5226 return timeout;
5227}
5228
1da177e4
LT		 5229static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5230{
5231 struct inode *inode = state->inode;
5232 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5233 struct nfs_client *clp = server->nfs_client;
911d1aaf 5234 struct nfs_lockt_args arg = {
1da177e4 5235 .fh = NFS_FH(inode),
911d1aaf 5236 .fl = request,
1da177e4 5237 };
911d1aaf
TM		 5238 struct nfs_lockt_res res = {
5239 .denied = request,
1da177e4
LT		 5240 };
5241 struct rpc_message msg = {
5242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5243 .rpc_argp = &arg,
5244 .rpc_resp = &res,
5245 .rpc_cred = state->owner->so_cred,
5246 };
1da177e4
LT		 5247 struct nfs4_lock_state *lsp;
5248 int status;
5249
911d1aaf 5250 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5251 status = nfs4_set_lock_state(state, request);
5252 if (status != 0)
5253 goto out;
5254 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5255 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5256 arg.lock_owner.s_dev = server->s_dev;
7c513058 5257 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5258 switch (status) {
5259 case 0:
5260 request->fl_type = F_UNLCK;
5261 break;
5262 case -NFS4ERR_DENIED:
5263 status = 0;
1da177e4 5264 }
70cc6487 5265 request->fl_ops->fl_release_private(request);
a6f951dd 5266 request->fl_ops = NULL;
8d0a8a9d 5267out:
1da177e4
LT		 5268 return status;
5269}
5270
5271static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5272{
5273 struct nfs4_exception exception = { };
5274 int err;
5275
5276 do {
d1b748a5
TM		 5277 err = _nfs4_proc_getlk(state, cmd, request);
5278 trace_nfs4_get_lock(request, state, cmd, err);
5279 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5280 &exception);
5281 } while (exception.retry);
5282 return err;
5283}
5284
5285static int do_vfs_lock(struct file *file, struct file_lock *fl)
5286{
5287 int res = 0;
5288 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5289 case FL_POSIX:
5290 res = posix_lock_file_wait(file, fl);
5291 break;
5292 case FL_FLOCK:
5293 res = flock_lock_file_wait(file, fl);
5294 break;
5295 default:
5296 BUG();
5297 }
1da177e4
LT		 5298 return res;
5299}
5300
faf5f49c 5301struct nfs4_unlockdata {
911d1aaf
TM		 5302 struct nfs_locku_args arg;
5303 struct nfs_locku_res res;
faf5f49c
TM		 5304 struct nfs4_lock_state *lsp;
5305 struct nfs_open_context *ctx;
911d1aaf
TM		 5306 struct file_lock fl;
5307 const struct nfs_server *server;
26e976a8 5308 unsigned long timestamp;
faf5f49c
TM		 5309};
5310
911d1aaf
TM		 5311static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5312 struct nfs_open_context *ctx,
5313 struct nfs4_lock_state *lsp,
5314 struct nfs_seqid *seqid)
5315{
5316 struct nfs4_unlockdata *p;
5317 struct inode *inode = lsp->ls_state->inode;
5318
8535b2be 5319 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5320 if (p == NULL)
5321 return NULL;
5322 p->arg.fh = NFS_FH(inode);
5323 p->arg.fl = &p->fl;
5324 p->arg.seqid = seqid;
c1d51931 5325 p->res.seqid = seqid;
911d1aaf
TM		 5326 p->arg.stateid = &lsp->ls_stateid;
5327 p->lsp = lsp;
5328 atomic_inc(&lsp->ls_count);
5329 /* Ensure we don't close file until we're done freeing locks! */
5330 p->ctx = get_nfs_open_context(ctx);
5331 memcpy(&p->fl, fl, sizeof(p->fl));
5332 p->server = NFS_SERVER(inode);
5333 return p;
5334}
5335
06f814a3 5336static void nfs4_locku_release_calldata(void *data)
faf5f49c 5337{
963d8fe5 5338 struct nfs4_unlockdata *calldata = data;
911d1aaf 5339 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5340 nfs4_put_lock_state(calldata->lsp);
5341 put_nfs_open_context(calldata->ctx);
5342 kfree(calldata);
faf5f49c
TM		 5343}
5344
963d8fe5 5345static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5346{
963d8fe5 5347 struct nfs4_unlockdata *calldata = data;
faf5f49c 5348
14516c3a
TM		 5349 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5350 return;
faf5f49c
TM		 5351 switch (task->tk_status) {
5352 case 0:
f597c537
TM		 5353 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5354 &calldata->res.stateid);
26e976a8 5355 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5356 break;
9e33bed5
TM		 5357 case -NFS4ERR_BAD_STATEID:
5358 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5359 case -NFS4ERR_STALE_STATEID:
5360 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5361 break;
5362 default:
9e33bed5 5363 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5364 rpc_restart_call_prepare(task);
faf5f49c 5365 }
2b1bc308 5366 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5367}
5368
4ce70ada 5369static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5370{
4ce70ada 5371 struct nfs4_unlockdata *calldata = data;
faf5f49c 5372
911d1aaf 5373 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5374 goto out_wait;
795a88c9 5375 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5376 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5377 goto out_no_action;
faf5f49c 5378 }
26e976a8 5379 calldata->timestamp = jiffies;
035168ab 5380 if (nfs4_setup_sequence(calldata->server,
a893693c 5381 &calldata->arg.seq_args,
2240a9e2
TM		 5382 &calldata->res.seq_res,
5383 task) != 0)
5384 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5385 return;
5386out_no_action:
5387 task->tk_action = NULL;
5388out_wait:
5389 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5390}
5391
963d8fe5 5392static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5393 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5394 .rpc_call_done = nfs4_locku_done,
06f814a3 5395 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5396};
5397
a5d16a4d
TM		 5398static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5399 struct nfs_open_context *ctx,
5400 struct nfs4_lock_state *lsp,
5401 struct nfs_seqid *seqid)
5402{
5403 struct nfs4_unlockdata *data;
5138fde0
TM		 5404 struct rpc_message msg = {
5405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5406 .rpc_cred = ctx->cred,
5407 };
c970aa85
TM		 5408 struct rpc_task_setup task_setup_data = {
5409 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5410 .rpc_message = &msg,
c970aa85 5411 .callback_ops = &nfs4_locku_ops,
101070ca 5412 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5413 .flags = RPC_TASK_ASYNC,
5414 };
a5d16a4d 5415
fa940720
WAA		 5416 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5417 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5418
137d6aca
FF		 5419 /* Ensure this is an unlock - when canceling a lock, the
5420 * canceled lock is passed in, and it won't be an unlock.
5421 */
5422 fl->fl_type = F_UNLCK;
5423
a5d16a4d
TM		 5424 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5425 if (data == NULL) {
5426 nfs_free_seqid(seqid);
5427 return ERR_PTR(-ENOMEM);
5428 }
5429
a9c92d6b 5430 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5431 msg.rpc_argp = &data->arg;
5432 msg.rpc_resp = &data->res;
c970aa85
TM		 5433 task_setup_data.callback_data = data;
5434 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5435}
5436
faf5f49c
TM		 5437static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5438{
65b62a29
TM		 5439 struct inode *inode = state->inode;
5440 struct nfs4_state_owner *sp = state->owner;
5441 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5442 struct nfs_seqid *seqid;
1da177e4 5443 struct nfs4_lock_state *lsp;
06f814a3
TM		 5444 struct rpc_task *task;
5445 int status = 0;
536ff0f8 5446 unsigned char fl_flags = request->fl_flags;
faf5f49c 5447
8d0a8a9d 5448 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5449 /* Unlock _before_ we do the RPC call */
5450 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5451 /* Exclude nfs_delegation_claim_locks() */
5452 mutex_lock(&sp->so_delegreturn_mutex);
5453 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5454 down_read(&nfsi->rwsem);
5455 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5456 up_read(&nfsi->rwsem);
65b62a29 5457 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5458 goto out;
19e03c57
TM		 5459 }
5460 up_read(&nfsi->rwsem);
65b62a29 5461 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5462 if (status != 0)
9b073574
TM		 5463 goto out;
5464 /* Is this a delegated lock? */
8d0a8a9d 5465 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5466 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5467 goto out;
8535b2be 5468 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5469 status = -ENOMEM;
911d1aaf 5470 if (seqid == NULL)
9b073574 5471 goto out;
cd3758e3 5472 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5473 status = PTR_ERR(task);
5474 if (IS_ERR(task))
9b073574 5475 goto out;
a5d16a4d 5476 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5477 rpc_put_task(task);
9b073574 5478out:
536ff0f8 5479 request->fl_flags = fl_flags;
d1b748a5 5480 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5481 return status;
5482}
5483
a5d16a4d
TM		 5484struct nfs4_lockdata {
5485 struct nfs_lock_args arg;
5486 struct nfs_lock_res res;
5487 struct nfs4_lock_state *lsp;
5488 struct nfs_open_context *ctx;
5489 struct file_lock fl;
26e976a8 5490 unsigned long timestamp;
a5d16a4d
TM		 5491 int rpc_status;
5492 int cancelled;
66179efe 5493 struct nfs_server *server;
a5d16a4d
TM		 5494};
5495
5496static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5497 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5498 gfp_t gfp_mask)
1da177e4 5499{
a5d16a4d
TM		 5500 struct nfs4_lockdata *p;
5501 struct inode *inode = lsp->ls_state->inode;
1da177e4 5502 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5503
8535b2be 5504 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5505 if (p == NULL)
5506 return NULL;
5507
5508 p->arg.fh = NFS_FH(inode);
5509 p->arg.fl = &p->fl;
8535b2be 5510 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5511 if (p->arg.open_seqid == NULL)
5512 goto out_free;
8535b2be 5513 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5514 if (p->arg.lock_seqid == NULL)
2f74c0a0 5515 goto out_free_seqid;
a5d16a4d 5516 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5517 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5518 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5519 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5520 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5521 p->lsp = lsp;
66179efe 5522 p->server = server;
a5d16a4d
TM		 5523 atomic_inc(&lsp->ls_count);
5524 p->ctx = get_nfs_open_context(ctx);
5525 memcpy(&p->fl, fl, sizeof(p->fl));
5526 return p;
2f74c0a0
TM		 5527out_free_seqid:
5528 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5529out_free:
5530 kfree(p);
5531 return NULL;
5532}
5533
5534static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5535{
5536 struct nfs4_lockdata *data = calldata;
5537 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5538
3110ff80 5539 dprintk("%s: begin!\n", __func__);
2f74c0a0 5540 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5541 goto out_wait;
a5d16a4d
TM		 5542 /* Do we need to do an open_to_lock_owner? */
5543 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5544 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5545 goto out_release_lock_seqid;
8fe72bac 5546 }
8e472f33 5547 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5548 data->arg.new_lock_owner = 1;
c1d51931 5549 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5550 } else
5551 data->arg.new_lock_owner = 0;
5d422301
TM		 5552 if (!nfs4_valid_open_stateid(state)) {
5553 data->rpc_status = -EBADF;
5554 task->tk_action = NULL;
5555 goto out_release_open_seqid;
5556 }
26e976a8 5557 data->timestamp = jiffies;
035168ab
TM		 5558 if (nfs4_setup_sequence(data->server,
5559 &data->arg.seq_args,
2240a9e2 5560 &data->res.seq_res,
d9afbd1b 5561 task) == 0)
66179efe 5562 return;
5d422301 5563out_release_open_seqid:
2240a9e2
TM		 5564 nfs_release_seqid(data->arg.open_seqid);
5565out_release_lock_seqid:
5566 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5567out_wait:
5568 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5569 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5570}
5571
a5d16a4d
TM		 5572static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5573{
5574 struct nfs4_lockdata *data = calldata;
5575
3110ff80 5576 dprintk("%s: begin!\n", __func__);
a5d16a4d 5577
14516c3a
TM		 5578 if (!nfs4_sequence_done(task, &data->res.seq_res))
5579 return;
66179efe 5580
a5d16a4d 5581 data->rpc_status = task->tk_status;
a5d16a4d 5582 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5583 if (data->rpc_status == 0)
5584 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5585 else
5586 goto out;
5587 }
5588 if (data->rpc_status == 0) {
f597c537 5589 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5590 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5591 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5592 }
a5d16a4d 5593out:
3110ff80 5594 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5595}
5596
5597static void nfs4_lock_release(void *calldata)
5598{
5599 struct nfs4_lockdata *data = calldata;
5600
3110ff80 5601 dprintk("%s: begin!\n", __func__);
2f74c0a0 5602 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5603 if (data->cancelled != 0) {
5604 struct rpc_task *task;
5605 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5606 data->arg.lock_seqid);
5607 if (!IS_ERR(task))
bf294b41 5608 rpc_put_task_async(task);
3110ff80 5609 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5610 } else
5611 nfs_free_seqid(data->arg.lock_seqid);
5612 nfs4_put_lock_state(data->lsp);
5613 put_nfs_open_context(data->ctx);
5614 kfree(data);
3110ff80 5615 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5616}
5617
5618static const struct rpc_call_ops nfs4_lock_ops = {
5619 .rpc_call_prepare = nfs4_lock_prepare,
5620 .rpc_call_done = nfs4_lock_done,
5621 .rpc_release = nfs4_lock_release,
5622};
5623
2bee72a6
TM		 5624static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5625{
2bee72a6
TM		 5626 switch (error) {
5627 case -NFS4ERR_ADMIN_REVOKED:
5628 case -NFS4ERR_BAD_STATEID:
ecac799a 5629 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5630 if (new_lock_owner != 0 ||
795a88c9 5631 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5632 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5633 break;
5634 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5635 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5636 case -NFS4ERR_EXPIRED:
5637 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5638 };
5639}
5640
afe6c27c 5641static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5642{
5643 struct nfs4_lockdata *data;
5644 struct rpc_task *task;
5138fde0
TM		 5645 struct rpc_message msg = {
5646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5647 .rpc_cred = state->owner->so_cred,
5648 };
c970aa85
TM		 5649 struct rpc_task_setup task_setup_data = {
5650 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5651 .rpc_message = &msg,
c970aa85 5652 .callback_ops = &nfs4_lock_ops,
101070ca 5653 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5654 .flags = RPC_TASK_ASYNC,
5655 };
a5d16a4d
TM		 5656 int ret;
5657
3110ff80 5658 dprintk("%s: begin!\n", __func__);
cd3758e3 5659 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5660 fl->fl_u.nfs4_fl.owner,
5661 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5662 if (data == NULL)
5663 return -ENOMEM;
5664 if (IS_SETLKW(cmd))
5665 data->arg.block = 1;
a9c92d6b 5666 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5667 msg.rpc_argp = &data->arg;
5668 msg.rpc_resp = &data->res;
c970aa85 5669 task_setup_data.callback_data = data;
8fe72bac
TM		 5670 if (recovery_type > NFS_LOCK_NEW) {
5671 if (recovery_type == NFS_LOCK_RECLAIM)
5672 data->arg.reclaim = NFS_LOCK_RECLAIM;
5673 nfs4_set_sequence_privileged(&data->arg.seq_args);
5674 }
c970aa85 5675 task = rpc_run_task(&task_setup_data);
7a1218a2 5676 if (IS_ERR(task))
a5d16a4d 5677 return PTR_ERR(task);
a5d16a4d
TM		 5678 ret = nfs4_wait_for_completion_rpc_task(task);
5679 if (ret == 0) {
5680 ret = data->rpc_status;
2bee72a6
TM		 5681 if (ret)
5682 nfs4_handle_setlk_error(data->server, data->lsp,
5683 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5684 } else
5685 data->cancelled = 1;
e6b3c4db 5686 rpc_put_task(task);
3110ff80 5687 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5688 return ret;
1da177e4
LT		 5689}
5690
5691static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5692{
202b50dc 5693 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5694 struct nfs4_exception exception = {
5695 .inode = state->inode,
5696 };
202b50dc
TM		 5697 int err;
5698
5699 do {
42a2d13e
TM		 5700 /* Cache the lock if possible... */
5701 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5702 return 0;
afe6c27c 5703 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5704 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5705 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5706 break;
5707 nfs4_handle_exception(server, err, &exception);
5708 } while (exception.retry);
5709 return err;
1da177e4
LT		 5710}
5711
5712static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5713{
202b50dc 5714 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5715 struct nfs4_exception exception = {
5716 .inode = state->inode,
5717 };
202b50dc
TM		 5718 int err;
5719
6bfc93ef
TM		 5720 err = nfs4_set_lock_state(state, request);
5721 if (err != 0)
5722 return err;
f6de7a39 5723 if (!recover_lost_locks) {
ef1820f9
N		 5724 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5725 return 0;
5726 }
202b50dc 5727 do {
42a2d13e
TM		 5728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5729 return 0;
afe6c27c 5730 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5731 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5732 switch (err) {
5733 default:
5734 goto out;
5735 case -NFS4ERR_GRACE:
5736 case -NFS4ERR_DELAY:
5737 nfs4_handle_exception(server, err, &exception);
5738 err = 0;
5739 }
202b50dc 5740 } while (exception.retry);
a9ed2e25 5741out:
202b50dc 5742 return err;
1da177e4
LT		 5743}
5744
f062eb6c 5745#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5746/**
5747 * nfs41_check_expired_locks - possibly free a lock stateid
5748 *
5749 * @state: NFSv4 state for an inode
5750 *
5751 * Returns NFS_OK if recovery for this stateid is now finished.
5752 * Otherwise a negative NFS4ERR value is returned.
5753 */
b01dd1d8 5754static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5755{
eb64cf96 5756 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5757 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5758 struct nfs_server *server = NFS_SERVER(state->inode);
5759
b01dd1d8 5760 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5761 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5762 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5763
5764 status = nfs41_test_stateid(server,
5765 &lsp->ls_stateid,
5766 cred);
08cb47fa 5767 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5768 if (status != NFS_OK) {
3e60ffdd
CL		 5769 /* Free the stateid unless the server
5770 * informs us the stateid is unrecognized. */
89af2739
CL		 5771 if (status != -NFS4ERR_BAD_STATEID)
5772 nfs41_free_stateid(server,
ab7cb0df
TM		 5773 &lsp->ls_stateid,
5774 cred);
795a88c9 5775 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5776 ret = status;
5777 }
5778 }
5779 };
5780
5781 return ret;
5782}
5783
5784static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5785{
5786 int status = NFS_OK;
5787
5788 if (test_bit(LK_STATE_IN_USE, &state->flags))
5789 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5790 if (status != NFS_OK)
5791 status = nfs4_lock_expired(state, request);
5792 return status;
f062eb6c
BS		 5793}
5794#endif
5795
1da177e4
LT		 5796static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5797{
9a99af49 5798 struct nfs4_state_owner *sp = state->owner;
19e03c57 5799 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5800 unsigned char fl_flags = request->fl_flags;
9a99af49 5801 unsigned int seq;
8e469ebd 5802 int status = -ENOLCK;
1da177e4 5803
8e469ebd
TM		 5804 if ((fl_flags & FL_POSIX) &&
5805 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5806 goto out;
6bfc93ef 5807 /* Is this a delegated open? */
6bfc93ef
TM		 5808 status = nfs4_set_lock_state(state, request);
5809 if (status != 0)
5810 goto out;
01c3b861
TM		 5811 request->fl_flags |= FL_ACCESS;
5812 status = do_vfs_lock(request->fl_file, request);
5813 if (status < 0)
5814 goto out;
19e03c57 5815 down_read(&nfsi->rwsem);
01c3b861 5816 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5817 /* Yes: cache locks! */
01c3b861 5818 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5819 request->fl_flags = fl_flags & ~FL_SLEEP;
5820 status = do_vfs_lock(request->fl_file, request);
5821 goto out_unlock;
01c3b861 5822 }
9a99af49
TM		 5823 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5824 up_read(&nfsi->rwsem);
afe6c27c 5825 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5826 if (status != 0)
9a99af49
TM		 5827 goto out;
5828 down_read(&nfsi->rwsem);
5829 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5830 status = -NFS4ERR_DELAY;
01c3b861 5831 goto out_unlock;
9a99af49 5832 }
6bfc93ef 5833 /* Note: we always want to sleep here! */
01c3b861 5834 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5835 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5836 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5837 "manager!\n", __func__);
01c3b861 5838out_unlock:
19e03c57 5839 up_read(&nfsi->rwsem);
01c3b861
TM		 5840out:
5841 request->fl_flags = fl_flags;
1da177e4
LT		 5842 return status;
5843}
5844
5845static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5846{
a1d0b5ee
TM		 5847 struct nfs4_exception exception = {
5848 .state = state,
05ffe24f 5849 .inode = state->inode,
a1d0b5ee 5850 };
1da177e4
LT		 5851 int err;
5852
5853 do {
965b5d67 5854 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5855 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5856 if (err == -NFS4ERR_DENIED)
5857 err = -EAGAIN;
1da177e4 5858 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5859 err, &exception);
1da177e4
LT		 5860 } while (exception.retry);
5861 return err;
5862}
5863
5864static int
5865nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5866{
5867 struct nfs_open_context *ctx;
5868 struct nfs4_state *state;
5869 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5870 int status;
5871
5872 /* verify open state */
cd3758e3 5873 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5874 state = ctx->state;
5875
5876 if (request->fl_start < 0 || request->fl_end < 0)
5877 return -EINVAL;
5878
d953126a
TM		 5879 if (IS_GETLK(cmd)) {
5880 if (state != NULL)
5881 return nfs4_proc_getlk(state, F_GETLK, request);
5882 return 0;
5883 }
1da177e4
LT		 5884
5885 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5886 return -EINVAL;
5887
d953126a
TM		 5888 if (request->fl_type == F_UNLCK) {
5889 if (state != NULL)
5890 return nfs4_proc_unlck(state, cmd, request);
5891 return 0;
5892 }
1da177e4 5893
d953126a
TM		 5894 if (state == NULL)
5895 return -ENOLCK;
55725513
TM		 5896 /*
5897 * Don't rely on the VFS having checked the file open mode,
5898 * since it won't do this for flock() locks.
5899 */
f44106e2 5900 switch (request->fl_type) {
55725513
TM		 5901 case F_RDLCK:
5902 if (!(filp->f_mode & FMODE_READ))
5903 return -EBADF;
5904 break;
5905 case F_WRLCK:
5906 if (!(filp->f_mode & FMODE_WRITE))
5907 return -EBADF;
5908 }
5909
1da177e4
LT		 5910 do {
5911 status = nfs4_proc_setlk(state, cmd, request);
5912 if ((status != -EAGAIN) || IS_SETLK(cmd))
5913 break;
5914 timeout = nfs4_set_lock_task_retry(timeout);
5915 status = -ERESTARTSYS;
5916 if (signalled())
5917 break;
5918 } while(status < 0);
1da177e4
LT		 5919 return status;
5920}
5921
db4f2e63 5922int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5923{
5924 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5925 int err;
5926
5927 err = nfs4_set_lock_state(state, fl);
5928 if (err != 0)
db4f2e63 5929 return err;
4a706fa0 5930 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5931 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5932}
6b3b5496 5933
cf470c3e
TM		 5934struct nfs_release_lockowner_data {
5935 struct nfs4_lock_state *lsp;
5ae67c4f 5936 struct nfs_server *server;
cf470c3e 5937 struct nfs_release_lockowner_args args;
b7e63a10 5938 struct nfs_release_lockowner_res res;
60ea6812 5939 unsigned long timestamp;
cf470c3e
TM		 5940};
5941
fbd4bfd1
CL		 5942static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5943{
5944 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5945 struct nfs_server *server = data->server;
5946 nfs40_setup_sequence(server, &data->args.seq_args,
5947 &data->res.seq_res, task);
5948 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5949 data->timestamp = jiffies;
fbd4bfd1
CL		 5950}
5951
5952static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5953{
5954 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5955 struct nfs_server *server = data->server;
5956
b7e63a10 5957 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5958
5959 switch (task->tk_status) {
5960 case 0:
5961 renew_lease(server, data->timestamp);
5962 break;
5963 case -NFS4ERR_STALE_CLIENTID:
5964 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5965 nfs4_schedule_lease_recovery(server->nfs_client);
5966 break;
60ea6812
CL		 5967 case -NFS4ERR_LEASE_MOVED:
5968 case -NFS4ERR_DELAY:
5969 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5970 rpc_restart_call_prepare(task);
5971 }
fbd4bfd1
CL		 5972}
5973
d3c7b7cc
TM		 5974static void nfs4_release_lockowner_release(void *calldata)
5975{
cf470c3e 5976 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5977 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5978 kfree(calldata);
5979}
5980
17280175 5981static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5982 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5983 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5984 .rpc_release = nfs4_release_lockowner_release,
5985};
5986
f1cdae87
JL		 5987static void
5988nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5989{
cf470c3e 5990 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5991 struct rpc_message msg = {
5992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5993 };
5994
5995 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 5996 return;
fbd4bfd1 5997
cf470c3e
TM		 5998 data = kmalloc(sizeof(*data), GFP_NOFS);
5999 if (!data)
f1cdae87 6000 return;
cf470c3e 6001 data->lsp = lsp;
5ae67c4f 6002 data->server = server;
cf470c3e
TM		 6003 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6004 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6005 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6006
cf470c3e 6007 msg.rpc_argp = &data->args;
b7e63a10
TM		 6008 msg.rpc_resp = &data->res;
6009 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6010 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6011}
6012
aa1870af
BF		 6013#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6014
64c2ce8b
AK		 6015static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6016 const void *buf, size_t buflen,
6017 int flags, int type)
6b3b5496 6018{
64c2ce8b
AK		 6019 if (strcmp(key, "") != 0)
6020 return -EINVAL;
4b580ee3 6021
64c2ce8b 6022 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6023}
6024
64c2ce8b
AK		 6025static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6026 void *buf, size_t buflen, int type)
6b3b5496 6027{
64c2ce8b
AK		 6028 if (strcmp(key, "") != 0)
6029 return -EINVAL;
aa1870af 6030
64c2ce8b 6031 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6032}
6033
64c2ce8b
AK		 6034static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6035 size_t list_len, const char *name,
6036 size_t name_len, int type)
6b3b5496 6037{
64c2ce8b 6038 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6039
096455a2
BF		 6040 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6041 return 0;
64c2ce8b
AK		 6042
6043 if (list && len <= list_len)
6044 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6045 return len;
6b3b5496
BF		 6046}
6047
c9bccef6
DQ		 6048#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6049static inline int nfs4_server_supports_labels(struct nfs_server *server)
6050{
6051 return server->caps & NFS_CAP_SECURITY_LABEL;
6052}
6053
6054static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6055 const void *buf, size_t buflen,
6056 int flags, int type)
6057{
6058 if (security_ismaclabel(key))
6059 return nfs4_set_security_label(dentry, buf, buflen);
6060
6061 return -EOPNOTSUPP;
6062}
6063
6064static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6065 void *buf, size_t buflen, int type)
6066{
6067 if (security_ismaclabel(key))
6068 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6069 return -EOPNOTSUPP;
6070}
6071
6072static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6073 size_t list_len, const char *name,
6074 size_t name_len, int type)
6075{
6076 size_t len = 0;
6077
6078 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6079 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6080 if (list && len <= list_len)
6081 security_inode_listsecurity(dentry->d_inode, list, len);
6082 }
6083 return len;
6084}
6085
6086static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6087 .prefix = XATTR_SECURITY_PREFIX,
6088 .list = nfs4_xattr_list_nfs4_label,
6089 .get = nfs4_xattr_get_nfs4_label,
6090 .set = nfs4_xattr_set_nfs4_label,
6091};
6092#endif
6093
6094
533eb461
AA		 6095/*
6096 * nfs_fhget will use either the mounted_on_fileid or the fileid
6097 */
69aaaae1
TM		 6098static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6099{
533eb461
AA		 6100 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6101 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6102 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6103 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6104 return;
6105
6106 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6107 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6108 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6109 fattr->nlink = 2;
6110}
6111
f05d147f
BS		 6112static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6113 const struct qstr *name,
6114 struct nfs4_fs_locations *fs_locations,
6115 struct page *page)
683b57b4
TM		 6116{
6117 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6118 u32 bitmask[3] = {
361e624f 6119 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6120 };
6121 struct nfs4_fs_locations_arg args = {
6122 .dir_fh = NFS_FH(dir),
c228fd3a 6123 .name = name,
683b57b4
TM		 6124 .page = page,
6125 .bitmask = bitmask,
6126 };
22958463
BH		 6127 struct nfs4_fs_locations_res res = {
6128 .fs_locations = fs_locations,
6129 };
683b57b4
TM		 6130 struct rpc_message msg = {
6131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6132 .rpc_argp = &args,
22958463 6133 .rpc_resp = &res,
683b57b4
TM		 6134 };
6135 int status;
6136
3110ff80 6137 dprintk("%s: start\n", __func__);
533eb461
AA		 6138
6139 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6140 * is not supported */
6141 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6142 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6143 else
6144 bitmask[0] |= FATTR4_WORD0_FILEID;
6145
c228fd3a 6146 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6147 fs_locations->server = server;
830b8e33 6148 fs_locations->nlocations = 0;
f05d147f 6149 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6150 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6151 return status;
6152}
6153
f05d147f
BS		 6154int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6155 const struct qstr *name,
6156 struct nfs4_fs_locations *fs_locations,
6157 struct page *page)
db0a9593
BS		 6158{
6159 struct nfs4_exception exception = { };
6160 int err;
6161 do {
078ea3df
TM		 6162 err = _nfs4_proc_fs_locations(client, dir, name,
6163 fs_locations, page);
6164 trace_nfs4_get_fs_locations(dir, name, err);
6165 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6166 &exception);
6167 } while (exception.retry);
6168 return err;
6169}
6170
b03d735b
CL		 6171/*
6172 * This operation also signals the server that this client is
6173 * performing migration recovery. The server can stop returning
6174 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6175 * appended to this compound to identify the client ID which is
6176 * performing recovery.
6177 */
6178static int _nfs40_proc_get_locations(struct inode *inode,
6179 struct nfs4_fs_locations *locations,
6180 struct page *page, struct rpc_cred *cred)
6181{
6182 struct nfs_server *server = NFS_SERVER(inode);
6183 struct rpc_clnt *clnt = server->client;
6184 u32 bitmask[2] = {
6185 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6186 };
6187 struct nfs4_fs_locations_arg args = {
6188 .clientid = server->nfs_client->cl_clientid,
6189 .fh = NFS_FH(inode),
6190 .page = page,
6191 .bitmask = bitmask,
6192 .migration = 1, /* skip LOOKUP */
6193 .renew = 1, /* append RENEW */
6194 };
6195 struct nfs4_fs_locations_res res = {
6196 .fs_locations = locations,
6197 .migration = 1,
6198 .renew = 1,
6199 };
6200 struct rpc_message msg = {
6201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6202 .rpc_argp = &args,
6203 .rpc_resp = &res,
6204 .rpc_cred = cred,
6205 };
6206 unsigned long now = jiffies;
6207 int status;
6208
6209 nfs_fattr_init(&locations->fattr);
6210 locations->server = server;
6211 locations->nlocations = 0;
6212
6213 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6214 nfs4_set_sequence_privileged(&args.seq_args);
6215 status = nfs4_call_sync_sequence(clnt, server, &msg,
6216 &args.seq_args, &res.seq_res);
6217 if (status)
6218 return status;
6219
6220 renew_lease(server, now);
6221 return 0;
6222}
6223
6224#ifdef CONFIG_NFS_V4_1
6225
6226/*
6227 * This operation also signals the server that this client is
6228 * performing migration recovery. The server can stop asserting
6229 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6230 * performing this operation is identified in the SEQUENCE
6231 * operation in this compound.
6232 *
6233 * When the client supports GETATTR(fs_locations_info), it can
6234 * be plumbed in here.
6235 */
6236static int _nfs41_proc_get_locations(struct inode *inode,
6237 struct nfs4_fs_locations *locations,
6238 struct page *page, struct rpc_cred *cred)
6239{
6240 struct nfs_server *server = NFS_SERVER(inode);
6241 struct rpc_clnt *clnt = server->client;
6242 u32 bitmask[2] = {
6243 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6244 };
6245 struct nfs4_fs_locations_arg args = {
6246 .fh = NFS_FH(inode),
6247 .page = page,
6248 .bitmask = bitmask,
6249 .migration = 1, /* skip LOOKUP */
6250 };
6251 struct nfs4_fs_locations_res res = {
6252 .fs_locations = locations,
6253 .migration = 1,
6254 };
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6257 .rpc_argp = &args,
6258 .rpc_resp = &res,
6259 .rpc_cred = cred,
6260 };
6261 int status;
6262
6263 nfs_fattr_init(&locations->fattr);
6264 locations->server = server;
6265 locations->nlocations = 0;
6266
6267 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6268 nfs4_set_sequence_privileged(&args.seq_args);
6269 status = nfs4_call_sync_sequence(clnt, server, &msg,
6270 &args.seq_args, &res.seq_res);
6271 if (status == NFS4_OK &&
6272 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6273 status = -NFS4ERR_LEASE_MOVED;
6274 return status;
6275}
6276
6277#endif /* CONFIG_NFS_V4_1 */
6278
6279/**
6280 * nfs4_proc_get_locations - discover locations for a migrated FSID
6281 * @inode: inode on FSID that is migrating
6282 * @locations: result of query
6283 * @page: buffer
6284 * @cred: credential to use for this operation
6285 *
6286 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6287 * operation failed, or a negative errno if a local error occurred.
6288 *
6289 * On success, "locations" is filled in, but if the server has
6290 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6291 * asserted.
6292 *
6293 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6294 * from this client that require migration recovery.
6295 */
6296int nfs4_proc_get_locations(struct inode *inode,
6297 struct nfs4_fs_locations *locations,
6298 struct page *page, struct rpc_cred *cred)
6299{
6300 struct nfs_server *server = NFS_SERVER(inode);
6301 struct nfs_client *clp = server->nfs_client;
6302 const struct nfs4_mig_recovery_ops *ops =
6303 clp->cl_mvops->mig_recovery_ops;
6304 struct nfs4_exception exception = { };
6305 int status;
6306
6307 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6308 (unsigned long long)server->fsid.major,
6309 (unsigned long long)server->fsid.minor,
6310 clp->cl_hostname);
6311 nfs_display_fhandle(NFS_FH(inode), __func__);
6312
6313 do {
6314 status = ops->get_locations(inode, locations, page, cred);
6315 if (status != -NFS4ERR_DELAY)
6316 break;
6317 nfs4_handle_exception(server, status, &exception);
6318 } while (exception.retry);
6319 return status;
6320}
6321
44c99933
CL		 6322/*
6323 * This operation also signals the server that this client is
6324 * performing "lease moved" recovery. The server can stop
6325 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6326 * is appended to this compound to identify the client ID which is
6327 * performing recovery.
6328 */
6329static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6330{
6331 struct nfs_server *server = NFS_SERVER(inode);
6332 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6333 struct rpc_clnt *clnt = server->client;
6334 struct nfs4_fsid_present_arg args = {
6335 .fh = NFS_FH(inode),
6336 .clientid = clp->cl_clientid,
6337 .renew = 1, /* append RENEW */
6338 };
6339 struct nfs4_fsid_present_res res = {
6340 .renew = 1,
6341 };
6342 struct rpc_message msg = {
6343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6344 .rpc_argp = &args,
6345 .rpc_resp = &res,
6346 .rpc_cred = cred,
6347 };
6348 unsigned long now = jiffies;
6349 int status;
6350
6351 res.fh = nfs_alloc_fhandle();
6352 if (res.fh == NULL)
6353 return -ENOMEM;
6354
6355 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6356 nfs4_set_sequence_privileged(&args.seq_args);
6357 status = nfs4_call_sync_sequence(clnt, server, &msg,
6358 &args.seq_args, &res.seq_res);
6359 nfs_free_fhandle(res.fh);
6360 if (status)
6361 return status;
6362
6363 do_renew_lease(clp, now);
6364 return 0;
6365}
6366
6367#ifdef CONFIG_NFS_V4_1
6368
6369/*
6370 * This operation also signals the server that this client is
6371 * performing "lease moved" recovery. The server can stop asserting
6372 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6373 * this operation is identified in the SEQUENCE operation in this
6374 * compound.
6375 */
6376static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6377{
6378 struct nfs_server *server = NFS_SERVER(inode);
6379 struct rpc_clnt *clnt = server->client;
6380 struct nfs4_fsid_present_arg args = {
6381 .fh = NFS_FH(inode),
6382 };
6383 struct nfs4_fsid_present_res res = {
6384 };
6385 struct rpc_message msg = {
6386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6387 .rpc_argp = &args,
6388 .rpc_resp = &res,
6389 .rpc_cred = cred,
6390 };
6391 int status;
6392
6393 res.fh = nfs_alloc_fhandle();
6394 if (res.fh == NULL)
6395 return -ENOMEM;
6396
6397 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6398 nfs4_set_sequence_privileged(&args.seq_args);
6399 status = nfs4_call_sync_sequence(clnt, server, &msg,
6400 &args.seq_args, &res.seq_res);
6401 nfs_free_fhandle(res.fh);
6402 if (status == NFS4_OK &&
6403 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6404 status = -NFS4ERR_LEASE_MOVED;
6405 return status;
6406}
6407
6408#endif /* CONFIG_NFS_V4_1 */
6409
6410/**
6411 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6412 * @inode: inode on FSID to check
6413 * @cred: credential to use for this operation
6414 *
6415 * Server indicates whether the FSID is present, moved, or not
6416 * recognized. This operation is necessary to clear a LEASE_MOVED
6417 * condition for this client ID.
6418 *
6419 * Returns NFS4_OK if the FSID is present on this server,
6420 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6421 * NFS4ERR code if some error occurred on the server, or a
6422 * negative errno if a local failure occurred.
6423 */
6424int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6425{
6426 struct nfs_server *server = NFS_SERVER(inode);
6427 struct nfs_client *clp = server->nfs_client;
6428 const struct nfs4_mig_recovery_ops *ops =
6429 clp->cl_mvops->mig_recovery_ops;
6430 struct nfs4_exception exception = { };
6431 int status;
6432
6433 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6434 (unsigned long long)server->fsid.major,
6435 (unsigned long long)server->fsid.minor,
6436 clp->cl_hostname);
6437 nfs_display_fhandle(NFS_FH(inode), __func__);
6438
6439 do {
6440 status = ops->fsid_present(inode, cred);
6441 if (status != -NFS4ERR_DELAY)
6442 break;
6443 nfs4_handle_exception(server, status, &exception);
6444 } while (exception.retry);
6445 return status;
6446}
6447
5ec16a85 6448/**
a5250def
WAA		 6449 * If 'use_integrity' is true and the state managment nfs_client
6450 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6451 * and the machine credential as per RFC3530bis and RFC5661 Security
6452 * Considerations sections. Otherwise, just use the user cred with the
6453 * filesystem's rpc_client.
5ec16a85 6454 */
a5250def 6455static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6456{
6457 int status;
6458 struct nfs4_secinfo_arg args = {
6459 .dir_fh = NFS_FH(dir),
6460 .name = name,
6461 };
6462 struct nfs4_secinfo_res res = {
6463 .flavors = flavors,
6464 };
6465 struct rpc_message msg = {
6466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6467 .rpc_argp = &args,
6468 .rpc_resp = &res,
6469 };
a5250def 6470 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6471 struct rpc_cred *cred = NULL;
a5250def
WAA		 6472
6473 if (use_integrity) {
6474 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6475 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6476 msg.rpc_cred = cred;
a5250def 6477 }
5a5ea0d4
BS		 6478
6479 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6480
6481 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6482 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6483
a5250def
WAA		 6484 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6485 &res.seq_res, 0);
5a5ea0d4 6486 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6487
7cb852df
WAA		 6488 if (cred)
6489 put_rpccred(cred);
a5250def 6490
5a5ea0d4
BS		 6491 return status;
6492}
6493
72de53ec
BS		 6494int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6495 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6496{
6497 struct nfs4_exception exception = { };
6498 int err;
6499 do {
a5250def
WAA		 6500 err = -NFS4ERR_WRONGSEC;
6501
6502 /* try to use integrity protection with machine cred */
6503 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6504 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6505
6506 /*
6507 * if unable to use integrity protection, or SECINFO with
6508 * integrity protection returns NFS4ERR_WRONGSEC (which is
6509 * disallowed by spec, but exists in deployed servers) use
6510 * the current filesystem's rpc_client and the user cred.
6511 */
6512 if (err == -NFS4ERR_WRONGSEC)
6513 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6514
078ea3df
TM		 6515 trace_nfs4_secinfo(dir, name, err);
6516 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6517 &exception);
6518 } while (exception.retry);
6519 return err;
6520}
6521
557134a3 6522#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6523/*
6524 * Check the exchange flags returned by the server for invalid flags, having
6525 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6526 * DS flags set.
6527 */
6528static int nfs4_check_cl_exchange_flags(u32 flags)
6529{
6530 if (flags & ~EXCHGID4_FLAG_MASK_R)
6531 goto out_inval;
6532 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6533 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6534 goto out_inval;
6535 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6536 goto out_inval;
6537 return NFS_OK;
6538out_inval:
6539 return -NFS4ERR_INVAL;
6540}
6541
78fe0f41 6542static bool
79d4e1f0
CL		 6543nfs41_same_server_scope(struct nfs41_server_scope *a,
6544 struct nfs41_server_scope *b)
78fe0f41
WAA		 6545{
6546 if (a->server_scope_sz == b->server_scope_sz &&
6547 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6548 return true;
6549
6550 return false;
6551}
6552
7c44f1ae
WAA		 6553/*
6554 * nfs4_proc_bind_conn_to_session()
6555 *
6556 * The 4.1 client currently uses the same TCP connection for the
6557 * fore and backchannel.
6558 */
2cf047c9 6559int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6560{
6561 int status;
6562 struct nfs41_bind_conn_to_session_res res;
6563 struct rpc_message msg = {
6564 .rpc_proc =
6565 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6566 .rpc_argp = clp,
6567 .rpc_resp = &res,
2cf047c9 6568 .rpc_cred = cred,
7c44f1ae
WAA		 6569 };
6570
6571 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6572
6573 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6574 if (unlikely(res.session == NULL)) {
6575 status = -ENOMEM;
6576 goto out;
6577 }
6578
6579 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6580 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6581 if (status == 0) {
6582 if (memcmp(res.session->sess_id.data,
6583 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6584 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6585 status = -EIO;
6586 goto out_session;
6587 }
6588 if (res.dir != NFS4_CDFS4_BOTH) {
6589 dprintk("NFS: %s: Unexpected direction from server\n",
6590 __func__);
6591 status = -EIO;
6592 goto out_session;
6593 }
6594 if (res.use_conn_in_rdma_mode) {
6595 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6596 __func__);
6597 status = -EIO;
6598 goto out_session;
6599 }
6600 }
6601out_session:
6602 kfree(res.session);
6603out:
6604 dprintk("<-- %s status= %d\n", __func__, status);
6605 return status;
6606}
6607
99fe60d0 6608/*
fa940720
WAA		 6609 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6610 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6611 */
6612static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6613 .how = SP4_MACH_CRED,
6614 .enforce.u.words = {
6615 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6616 1 << (OP_EXCHANGE_ID - 32) |
6617 1 << (OP_CREATE_SESSION - 32) |
6618 1 << (OP_DESTROY_SESSION - 32) |
6619 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6620 },
6621 .allow.u.words = {
6622 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6623 1 << (OP_LOCKU) |
6624 1 << (OP_COMMIT),
8b5bee2e 6625 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6626 1 << (OP_SECINFO_NO_NAME - 32) |
6627 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6628 1 << (OP_FREE_STATEID - 32) |
6629 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6630 }
6631};
6632
6633/*
6634 * Select the state protection mode for client `clp' given the server results
6635 * from exchange_id in `sp'.
99fe60d0 6636 *
2031cd1a
WAA		 6637 * Returns 0 on success, negative errno otherwise.
6638 */
6639static int nfs4_sp4_select_mode(struct nfs_client *clp,
6640 struct nfs41_state_protection *sp)
6641{
6642 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6643 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6644 1 << (OP_EXCHANGE_ID - 32) |
6645 1 << (OP_CREATE_SESSION - 32) |
6646 1 << (OP_DESTROY_SESSION - 32) |
6647 1 << (OP_DESTROY_CLIENTID - 32)
6648 };
6649 unsigned int i;
6650
6651 if (sp->how == SP4_MACH_CRED) {
6652 /* Print state protect result */
6653 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6654 for (i = 0; i <= LAST_NFS4_OP; i++) {
6655 if (test_bit(i, sp->enforce.u.longs))
6656 dfprintk(MOUNT, " enforce op %d\n", i);
6657 if (test_bit(i, sp->allow.u.longs))
6658 dfprintk(MOUNT, " allow op %d\n", i);
6659 }
6660
6661 /* make sure nothing is on enforce list that isn't supported */
6662 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6663 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6664 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6665 return -EINVAL;
6666 }
6667 }
6668
6669 /*
6670 * Minimal mode - state operations are allowed to use machine
6671 * credential. Note this already happens by default, so the
6672 * client doesn't have to do anything more than the negotiation.
6673 *
6674 * NOTE: we don't care if EXCHANGE_ID is in the list -
6675 * we're already using the machine cred for exchange_id
6676 * and will never use a different cred.
6677 */
6678 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6679 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6680 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6681 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6682 dfprintk(MOUNT, "sp4_mach_cred:\n");
6683 dfprintk(MOUNT, " minimal mode enabled\n");
6684 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6685 } else {
6686 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6687 return -EINVAL;
6688 }
fa940720
WAA		 6689
6690 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6691 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6692 dfprintk(MOUNT, " cleanup mode enabled\n");
6693 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6694 }
8b5bee2e
WAA		 6695
6696 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6697 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6698 dfprintk(MOUNT, " secinfo mode enabled\n");
6699 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6700 }
3787d506
WAA		 6701
6702 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6703 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " stateid mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6706 }
8c21c62c
WAA		 6707
6708 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6709 dfprintk(MOUNT, " write mode enabled\n");
6710 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6711 }
6712
6713 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6714 dfprintk(MOUNT, " commit mode enabled\n");
6715 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6716 }
2031cd1a
WAA		 6717 }
6718
6719 return 0;
6720}
6721
6722/*
6723 * _nfs4_proc_exchange_id()
6bbb4ae8 6724 *
2031cd1a 6725 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6726 */
2031cd1a
WAA		 6727static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6728 u32 sp4_how)
99fe60d0
BH		 6729{
6730 nfs4_verifier verifier;
6731 struct nfs41_exchange_id_args args = {
cd93710e 6732 .verifier = &verifier,
99fe60d0 6733 .client = clp,
cd3fadec 6734#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6735 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6736 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6737 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6738#else
6739 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6740 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6741#endif
99fe60d0
BH		 6742 };
6743 struct nfs41_exchange_id_res res = {
32b01310 6744 0
99fe60d0
BH		 6745 };
6746 int status;
6747 struct rpc_message msg = {
6748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6749 .rpc_argp = &args,
6750 .rpc_resp = &res,
6751 .rpc_cred = cred,
6752 };
99fe60d0 6753
f092075d 6754 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6755 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6756 sizeof(args.id));
6bbb4ae8
CL		 6757 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6758 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6759 args.id_len, args.id);
99fe60d0 6760
acdeb69d 6761 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6762 GFP_NOFS);
acdeb69d 6763 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6764 status = -ENOMEM;
6765 goto out;
6766 }
78fe0f41 6767
79d4e1f0 6768 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6769 GFP_NOFS);
177313f1 6770 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6771 status = -ENOMEM;
acdeb69d 6772 goto out_server_owner;
abe9a6d5 6773 }
78fe0f41 6774
bbafffd2 6775 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6776 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6777 status = -ENOMEM;
6778 goto out_server_scope;
6779 }
6780
2031cd1a
WAA		 6781 switch (sp4_how) {
6782 case SP4_NONE:
6783 args.state_protect.how = SP4_NONE;
6784 break;
6785
6786 case SP4_MACH_CRED:
6787 args.state_protect = nfs4_sp4_mach_cred_request;
6788 break;
6789
6790 default:
6791 /* unsupported! */
6792 WARN_ON_ONCE(1);
6793 status = -EINVAL;
6794 goto out_server_scope;
6795 }
6796
1bd714f2 6797 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6798 trace_nfs4_exchange_id(clp, status);
177313f1 6799 if (status == 0)
32b01310 6800 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6801
2031cd1a
WAA		 6802 if (status == 0)
6803 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6804
acdeb69d 6805 if (status == 0) {
32b01310
TM		 6806 clp->cl_clientid = res.clientid;
6807 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6808 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6809 clp->cl_seqid = res.seqid;
6810
acdeb69d
CL		 6811 kfree(clp->cl_serverowner);
6812 clp->cl_serverowner = res.server_owner;
6813 res.server_owner = NULL;
78fe0f41 6814
7d2ed9ac 6815 /* use the most recent implementation id */
59155546
CL		 6816 kfree(clp->cl_implid);
6817 clp->cl_implid = res.impl_id;
7d2ed9ac 6818
177313f1 6819 if (clp->cl_serverscope != NULL &&
79d4e1f0 6820 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6821 res.server_scope)) {
6822 dprintk("%s: server_scope mismatch detected\n",
6823 __func__);
6824 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6825 kfree(clp->cl_serverscope);
6826 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6827 }
6828
177313f1 6829 if (clp->cl_serverscope == NULL) {
79d4e1f0 6830 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6831 goto out;
6832 }
32b01310
TM		 6833 } else
6834 kfree(res.impl_id);
7d2ed9ac 6835
acdeb69d
CL		 6836out_server_owner:
6837 kfree(res.server_owner);
7d2ed9ac 6838out_server_scope:
abe9a6d5
WAA		 6839 kfree(res.server_scope);
6840out:
177313f1 6841 if (clp->cl_implid != NULL)
6bbb4ae8 6842 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6843 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6844 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6845 clp->cl_implid->date.seconds,
6846 clp->cl_implid->date.nseconds);
6bbb4ae8 6847 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6848 return status;
6849}
6850
2031cd1a
WAA		 6851/*
6852 * nfs4_proc_exchange_id()
6853 *
6854 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6855 *
6856 * Since the clientid has expired, all compounds using sessions
6857 * associated with the stale clientid will be returning
6858 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6859 * be in some phase of session reset.
6860 *
6861 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6862 */
6863int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6864{
6865 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6866 int status;
6867
6868 /* try SP4_MACH_CRED if krb5i/p */
6869 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6870 authflavor == RPC_AUTH_GSS_KRB5P) {
6871 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6872 if (!status)
6873 return 0;
6874 }
6875
6876 /* try SP4_NONE */
6877 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6878}
6879
66245539
TM		 6880static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6881 struct rpc_cred *cred)
6882{
6883 struct rpc_message msg = {
6884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6885 .rpc_argp = clp,
6886 .rpc_cred = cred,
6887 };
6888 int status;
6889
6890 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6891 trace_nfs4_destroy_clientid(clp, status);
66245539 6892 if (status)
02c67525 6893 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6894 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6895 return status;
6896}
6897
6898static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6899 struct rpc_cred *cred)
6900{
6901 unsigned int loop;
6902 int ret;
6903
6904 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6905 ret = _nfs4_proc_destroy_clientid(clp, cred);
6906 switch (ret) {
6907 case -NFS4ERR_DELAY:
6908 case -NFS4ERR_CLIENTID_BUSY:
6909 ssleep(1);
6910 break;
6911 default:
6912 return ret;
6913 }
6914 }
6915 return 0;
6916}
6917
6918int nfs4_destroy_clientid(struct nfs_client *clp)
6919{
6920 struct rpc_cred *cred;
6921 int ret = 0;
6922
6923 if (clp->cl_mvops->minor_version < 1)
6924 goto out;
6925 if (clp->cl_exchange_flags == 0)
6926 goto out;
05f4c350
CL		 6927 if (clp->cl_preserve_clid)
6928 goto out;
73d8bde5 6929 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6930 ret = nfs4_proc_destroy_clientid(clp, cred);
6931 if (cred)
6932 put_rpccred(cred);
6933 switch (ret) {
6934 case 0:
6935 case -NFS4ERR_STALE_CLIENTID:
6936 clp->cl_exchange_flags = 0;
6937 }
6938out:
6939 return ret;
6940}
6941
2050f0cc
AA		 6942struct nfs4_get_lease_time_data {
6943 struct nfs4_get_lease_time_args *args;
6944 struct nfs4_get_lease_time_res *res;
6945 struct nfs_client *clp;
6946};
6947
6948static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6949 void *calldata)
6950{
2050f0cc
AA		 6951 struct nfs4_get_lease_time_data *data =
6952 (struct nfs4_get_lease_time_data *)calldata;
6953
6954 dprintk("--> %s\n", __func__);
6955 /* just setup sequence, do not trigger session recovery
6956 since we're invoked within one */
d9afbd1b
TM		 6957 nfs41_setup_sequence(data->clp->cl_session,
6958 &data->args->la_seq_args,
6959 &data->res->lr_seq_res,
6960 task);
2050f0cc
AA		 6961 dprintk("<-- %s\n", __func__);
6962}
6963
6964/*
6965 * Called from nfs4_state_manager thread for session setup, so don't recover
6966 * from sequence operation or clientid errors.
6967 */
6968static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6969{
6970 struct nfs4_get_lease_time_data *data =
6971 (struct nfs4_get_lease_time_data *)calldata;
6972
6973 dprintk("--> %s\n", __func__);
14516c3a
TM		 6974 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6975 return;
2050f0cc
AA		 6976 switch (task->tk_status) {
6977 case -NFS4ERR_DELAY:
6978 case -NFS4ERR_GRACE:
6979 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6980 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6981 task->tk_status = 0;
a8a4ae3a
AA		 6982 /* fall through */
6983 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6984 rpc_restart_call_prepare(task);
2050f0cc
AA		 6985 return;
6986 }
2050f0cc
AA		 6987 dprintk("<-- %s\n", __func__);
6988}
6989
17280175 6990static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6991 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6992 .rpc_call_done = nfs4_get_lease_time_done,
6993};
6994
6995int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6996{
6997 struct rpc_task *task;
6998 struct nfs4_get_lease_time_args args;
6999 struct nfs4_get_lease_time_res res = {
7000 .lr_fsinfo = fsinfo,
7001 };
7002 struct nfs4_get_lease_time_data data = {
7003 .args = &args,
7004 .res = &res,
7005 .clp = clp,
7006 };
7007 struct rpc_message msg = {
7008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7009 .rpc_argp = &args,
7010 .rpc_resp = &res,
7011 };
7012 struct rpc_task_setup task_setup = {
7013 .rpc_client = clp->cl_rpcclient,
7014 .rpc_message = &msg,
7015 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7016 .callback_data = &data,
7017 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7018 };
7019 int status;
7020
a9c92d6b 7021 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7022 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7023 dprintk("--> %s\n", __func__);
7024 task = rpc_run_task(&task_setup);
7025
7026 if (IS_ERR(task))
7027 status = PTR_ERR(task);
7028 else {
7029 status = task->tk_status;
7030 rpc_put_task(task);
7031 }
7032 dprintk("<-- %s return %d\n", __func__, status);
7033
7034 return status;
7035}
7036
fc931582
AA		 7037/*
7038 * Initialize the values to be used by the client in CREATE_SESSION
7039 * If nfs4_init_session set the fore channel request and response sizes,
7040 * use them.
7041 *
7042 * Set the back channel max_resp_sz_cached to zero to force the client to
7043 * always set csa_cachethis to FALSE because the current implementation
7044 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7045 */
7046static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7047{
18aad3d5
AA		 7048 unsigned int max_rqst_sz, max_resp_sz;
7049
7050 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7051 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7052
fc931582 7053 /* Fore channel attributes */
18aad3d5
AA		 7054 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7055 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7056 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7057 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7058
7059 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7060 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7061 __func__,
7062 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7063 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7064
7065 /* Back channel attributes */
fc931582
AA		 7066 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7067 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7068 args->bc_attrs.max_resp_sz_cached = 0;
7069 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7070 args->bc_attrs.max_reqs = 1;
7071
7072 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7073 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7074 __func__,
7075 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7076 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7077 args->bc_attrs.max_reqs);
7078}
7079
43c2e885 7080static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7081{
43c2e885
BF		 7082 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7083 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7084
43c2e885
BF		 7085 if (rcvd->max_resp_sz > sent->max_resp_sz)
7086 return -EINVAL;
7087 /*
7088 * Our requested max_ops is the minimum we need; we're not
7089 * prepared to break up compounds into smaller pieces than that.
7090 * So, no point even trying to continue if the server won't
7091 * cooperate:
7092 */
7093 if (rcvd->max_ops < sent->max_ops)
7094 return -EINVAL;
7095 if (rcvd->max_reqs == 0)
7096 return -EINVAL;
b4b9a0c1
VG		 7097 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7098 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7099 return 0;
8d35301d
AA		 7100}
7101
43c2e885
BF		 7102static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7103{
7104 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7105 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7106
43c2e885
BF		 7107 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7108 return -EINVAL;
7109 if (rcvd->max_resp_sz < sent->max_resp_sz)
7110 return -EINVAL;
7111 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7112 return -EINVAL;
7113 /* These would render the backchannel useless: */
b4b9a0c1 7114 if (rcvd->max_ops != sent->max_ops)
43c2e885 7115 return -EINVAL;
b4b9a0c1 7116 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7117 return -EINVAL;
7118 return 0;
7119}
8d35301d 7120
8d35301d
AA		 7121static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7122 struct nfs4_session *session)
7123{
43c2e885 7124 int ret;
8d35301d 7125
43c2e885
BF		 7126 ret = nfs4_verify_fore_channel_attrs(args, session);
7127 if (ret)
7128 return ret;
7129 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7130}
7131
848f5bda
TM		 7132static int _nfs4_proc_create_session(struct nfs_client *clp,
7133 struct rpc_cred *cred)
fc931582
AA		 7134{
7135 struct nfs4_session *session = clp->cl_session;
7136 struct nfs41_create_session_args args = {
7137 .client = clp,
7138 .cb_program = NFS4_CALLBACK,
7139 };
7140 struct nfs41_create_session_res res = {
7141 .client = clp,
7142 };
7143 struct rpc_message msg = {
7144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7145 .rpc_argp = &args,
7146 .rpc_resp = &res,
848f5bda 7147 .rpc_cred = cred,
fc931582
AA		 7148 };
7149 int status;
7150
7151 nfs4_init_channel_attrs(&args);
0f91421e 7152 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7153
1bd714f2 7154 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7155 trace_nfs4_create_session(clp, status);
fc931582 7156
43095d39 7157 if (!status) {
8d35301d
AA		 7158 /* Verify the session's negotiated channel_attrs values */
7159 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7160 /* Increment the clientid slot sequence id */
7161 clp->cl_seqid++;
7162 }
7163
7164 return status;
7165}
7166
7167/*
7168 * Issues a CREATE_SESSION operation to the server.
7169 * It is the responsibility of the caller to verify the session is
7170 * expired before calling this routine.
7171 */
848f5bda 7172int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7173{
7174 int status;
7175 unsigned *ptr;
fc931582
AA		 7176 struct nfs4_session *session = clp->cl_session;
7177
7178 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7179
848f5bda 7180 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7181 if (status)
7182 goto out;
7183
aacd5537
AA		 7184 /* Init or reset the session slot tables */
7185 status = nfs4_setup_session_slot_tables(session);
7186 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7187 if (status)
7188 goto out;
7189
7190 ptr = (unsigned *)&session->sess_id.data[0];
7191 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7192 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7193out:
7194 dprintk("<-- %s\n", __func__);
7195 return status;
7196}
7197
0f3e66c6
AA		 7198/*
7199 * Issue the over-the-wire RPC DESTROY_SESSION.
7200 * The caller must serialize access to this routine.
7201 */
848f5bda
TM		 7202int nfs4_proc_destroy_session(struct nfs4_session *session,
7203 struct rpc_cred *cred)
0f3e66c6 7204{
848f5bda
TM		 7205 struct rpc_message msg = {
7206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7207 .rpc_argp = session,
7208 .rpc_cred = cred,
7209 };
0f3e66c6 7210 int status = 0;
0f3e66c6
AA		 7211
7212 dprintk("--> nfs4_proc_destroy_session\n");
7213
7214 /* session is still being setup */
7215 if (session->clp->cl_cons_state != NFS_CS_READY)
7216 return status;
7217
1bd714f2 7218 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7219 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7220
7221 if (status)
08106ac7 7222 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7223 "Session has been destroyed regardless...\n", status);
7224
7225 dprintk("<-- nfs4_proc_destroy_session\n");
7226 return status;
7227}
7228
fc01cea9
AA		 7229/*
7230 * Renew the cl_session lease.
7231 */
d5f8d3fe
TM		 7232struct nfs4_sequence_data {
7233 struct nfs_client *clp;
7234 struct nfs4_sequence_args args;
7235 struct nfs4_sequence_res res;
7236};
7237
dc96aef9
AB		 7238static void nfs41_sequence_release(void *data)
7239{
d5f8d3fe
TM		 7240 struct nfs4_sequence_data *calldata = data;
7241 struct nfs_client *clp = calldata->clp;
dc96aef9 7242
7135840f
AB		 7243 if (atomic_read(&clp->cl_count) > 1)
7244 nfs4_schedule_state_renewal(clp);
7245 nfs_put_client(clp);
d5f8d3fe 7246 kfree(calldata);
dc96aef9
AB		 7247}
7248
aa5190d0
TM		 7249static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7250{
7251 switch(task->tk_status) {
7252 case -NFS4ERR_DELAY:
aa5190d0
TM		 7253 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7254 return -EAGAIN;
7255 default:
0400a6b0 7256 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7257 }
7258 return 0;
7259}
7260
dc96aef9 7261static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7262{
d5f8d3fe
TM		 7263 struct nfs4_sequence_data *calldata = data;
7264 struct nfs_client *clp = calldata->clp;
fc01cea9 7265
14516c3a
TM		 7266 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7267 return;
fc01cea9 7268
c6d01c6f 7269 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7270 if (task->tk_status < 0) {
7271 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7272 if (atomic_read(&clp->cl_count) == 1)
7273 goto out;
fc01cea9 7274
aa5190d0
TM		 7275 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7276 rpc_restart_call_prepare(task);
fc01cea9
AA		 7277 return;
7278 }
7279 }
fc01cea9 7280 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7281out:
fc01cea9
AA		 7282 dprintk("<-- %s\n", __func__);
7283}
7284
7285static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7286{
d5f8d3fe
TM		 7287 struct nfs4_sequence_data *calldata = data;
7288 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7289 struct nfs4_sequence_args *args;
7290 struct nfs4_sequence_res *res;
7291
fc01cea9
AA		 7292 args = task->tk_msg.rpc_argp;
7293 res = task->tk_msg.rpc_resp;
7294
d9afbd1b 7295 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7296}
7297
7298static const struct rpc_call_ops nfs41_sequence_ops = {
7299 .rpc_call_done = nfs41_sequence_call_done,
7300 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7301 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7302};
7303
8fe72bac
TM		 7304static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7305 struct rpc_cred *cred,
7306 bool is_privileged)
fc01cea9 7307{
d5f8d3fe 7308 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7309 struct rpc_message msg = {
7310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7311 .rpc_cred = cred,
7312 };
71ac6da9
TM		 7313 struct rpc_task_setup task_setup_data = {
7314 .rpc_client = clp->cl_rpcclient,
7315 .rpc_message = &msg,
8fe72bac 7316 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7317 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7318 };
fc01cea9 7319
7135840f 7320 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7321 return ERR_PTR(-EIO);
dfb4f309 7322 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7323 if (calldata == NULL) {
7135840f 7324 nfs_put_client(clp);
71ac6da9 7325 return ERR_PTR(-ENOMEM);
fc01cea9 7326 }
a9c92d6b 7327 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7328 if (is_privileged)
7329 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7330 msg.rpc_argp = &calldata->args;
7331 msg.rpc_resp = &calldata->res;
7332 calldata->clp = clp;
71ac6da9 7333 task_setup_data.callback_data = calldata;
fc01cea9 7334
71ac6da9
TM		 7335 return rpc_run_task(&task_setup_data);
7336}
7337
2f60ea6b 7338static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7339{
7340 struct rpc_task *task;
7341 int ret = 0;
7342
2f60ea6b
TM		 7343 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7344 return 0;
8fe72bac 7345 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7346 if (IS_ERR(task))
7347 ret = PTR_ERR(task);
7348 else
bf294b41 7349 rpc_put_task_async(task);
71ac6da9
TM		 7350 dprintk("<-- %s status=%d\n", __func__, ret);
7351 return ret;
7352}
7353
7354static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7355{
7356 struct rpc_task *task;
7357 int ret;
7358
8fe72bac 7359 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7360 if (IS_ERR(task)) {
7361 ret = PTR_ERR(task);
7362 goto out;
7363 }
7364 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7365 if (!ret) {
7366 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7367
7368 if (task->tk_status == 0)
7369 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7370 ret = task->tk_status;
b4410c2f 7371 }
71ac6da9
TM		 7372 rpc_put_task(task);
7373out:
7374 dprintk("<-- %s status=%d\n", __func__, ret);
7375 return ret;
fc01cea9
AA		 7376}
7377
fce5c838
RL		 7378struct nfs4_reclaim_complete_data {
7379 struct nfs_client *clp;
7380 struct nfs41_reclaim_complete_args arg;
7381 struct nfs41_reclaim_complete_res res;
7382};
7383
7384static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7385{
7386 struct nfs4_reclaim_complete_data *calldata = data;
7387
d9afbd1b
TM		 7388 nfs41_setup_sequence(calldata->clp->cl_session,
7389 &calldata->arg.seq_args,
7390 &calldata->res.seq_res,
7391 task);
fce5c838
RL		 7392}
7393
aa5190d0
TM		 7394static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7395{
7396 switch(task->tk_status) {
7397 case 0:
7398 case -NFS4ERR_COMPLETE_ALREADY:
7399 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7400 break;
7401 case -NFS4ERR_DELAY:
aa5190d0 7402 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7403 /* fall through */
7404 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7405 return -EAGAIN;
7406 default:
0400a6b0 7407 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7408 }
7409 return 0;
7410}
7411
fce5c838
RL		 7412static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7413{
7414 struct nfs4_reclaim_complete_data *calldata = data;
7415 struct nfs_client *clp = calldata->clp;
7416 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7417
7418 dprintk("--> %s\n", __func__);
14516c3a
TM		 7419 if (!nfs41_sequence_done(task, res))
7420 return;
fce5c838 7421
c6d01c6f 7422 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7423 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7424 rpc_restart_call_prepare(task);
7425 return;
7426 }
fce5c838
RL		 7427 dprintk("<-- %s\n", __func__);
7428}
7429
7430static void nfs4_free_reclaim_complete_data(void *data)
7431{
7432 struct nfs4_reclaim_complete_data *calldata = data;
7433
7434 kfree(calldata);
7435}
7436
7437static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7438 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7439 .rpc_call_done = nfs4_reclaim_complete_done,
7440 .rpc_release = nfs4_free_reclaim_complete_data,
7441};
7442
7443/*
7444 * Issue a global reclaim complete.
7445 */
965e9c23
TM		 7446static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7447 struct rpc_cred *cred)
fce5c838
RL		 7448{
7449 struct nfs4_reclaim_complete_data *calldata;
7450 struct rpc_task *task;
7451 struct rpc_message msg = {
7452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7453 .rpc_cred = cred,
fce5c838
RL		 7454 };
7455 struct rpc_task_setup task_setup_data = {
7456 .rpc_client = clp->cl_rpcclient,
7457 .rpc_message = &msg,
7458 .callback_ops = &nfs4_reclaim_complete_call_ops,
7459 .flags = RPC_TASK_ASYNC,
7460 };
7461 int status = -ENOMEM;
7462
7463 dprintk("--> %s\n", __func__);
8535b2be 7464 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7465 if (calldata == NULL)
7466 goto out;
7467 calldata->clp = clp;
7468 calldata->arg.one_fs = 0;
fce5c838 7469
a9c92d6b 7470 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7471 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7472 msg.rpc_argp = &calldata->arg;
7473 msg.rpc_resp = &calldata->res;
7474 task_setup_data.callback_data = calldata;
7475 task = rpc_run_task(&task_setup_data);
acf82b85 7476 if (IS_ERR(task)) {
fce5c838 7477 status = PTR_ERR(task);
acf82b85
DC		 7478 goto out;
7479 }
c34c32ea
AA		 7480 status = nfs4_wait_for_completion_rpc_task(task);
7481 if (status == 0)
7482 status = task->tk_status;
fce5c838 7483 rpc_put_task(task);
acf82b85 7484 return 0;
fce5c838
RL		 7485out:
7486 dprintk("<-- %s status=%d\n", __func__, status);
7487 return status;
7488}
b1f69b75
AA		 7489
7490static void
7491nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7492{
7493 struct nfs4_layoutget *lgp = calldata;
c31663d4 7494 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7495 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7496
7497 dprintk("--> %s\n", __func__);
c31663d4
FI		 7498 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7499 * right now covering the LAYOUTGET we are about to send.
7500 * However, that is not so catastrophic, and there seems
7501 * to be no way to prevent it completely.
7502 */
6ba7db34 7503 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7504 &lgp->res.seq_res, task))
b1f69b75 7505 return;
cf7d63f1
FI		 7506 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7507 NFS_I(lgp->args.inode)->layout,
7508 lgp->args.ctx->state)) {
7509 rpc_exit(task, NFS4_OK);
cf7d63f1 7510 }
b1f69b75
AA		 7511}
7512
7513static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7514{
7515 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7516 struct inode *inode = lgp->args.inode;
7517 struct nfs_server *server = NFS_SERVER(inode);
7518 struct pnfs_layout_hdr *lo;
7519 struct nfs4_state *state = NULL;
ed7e5423 7520 unsigned long timeo, now, giveup;
b1f69b75 7521
ed7e5423 7522 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7523
6ba7db34 7524 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7525 goto out;
b1f69b75
AA		 7526
7527 switch (task->tk_status) {
7528 case 0:
ee314c2a 7529 goto out;
ed7e5423
BH		 7530 /*
7531 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7532 * (or clients) writing to the same RAID stripe
7533 */
b1f69b75 7534 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7535 /*
7536 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7537 * existing layout before getting a new one).
7538 */
b1f69b75 7539 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7540 timeo = rpc_get_timeout(task->tk_client);
7541 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7542 now = jiffies;
7543 if (time_after(giveup, now)) {
7544 unsigned long delay;
7545
7546 /* Delay for:
7547 * - Not less then NFS4_POLL_RETRY_MIN.
7548 * - One last time a jiffie before we give up
7549 * - exponential backoff (time_now minus start_attempt)
7550 */
7551 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7552 min((giveup - now - 1),
7553 now - lgp->args.timestamp));
7554
7555 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7556 __func__, delay);
7557 rpc_delay(task, delay);
7558 task->tk_status = 0;
7559 rpc_restart_call_prepare(task);
7560 goto out; /* Do not call nfs4_async_handle_error() */
7561 }
ee314c2a
TM		 7562 break;
7563 case -NFS4ERR_EXPIRED:
7564 case -NFS4ERR_BAD_STATEID:
7565 spin_lock(&inode->i_lock);
7566 lo = NFS_I(inode)->layout;
7567 if (!lo || list_empty(&lo->plh_segs)) {
7568 spin_unlock(&inode->i_lock);
7569 /* If the open stateid was bad, then recover it. */
7570 state = lgp->args.ctx->state;
7571 } else {
7572 LIST_HEAD(head);
7573
7574 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7575 spin_unlock(&inode->i_lock);
7576 /* Mark the bad layout state as invalid, then
7577 * retry using the open stateid. */
7578 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7579 }
7580 }
ee314c2a
TM		 7581 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7582 rpc_restart_call_prepare(task);
7583out:
b1f69b75
AA		 7584 dprintk("<-- %s\n", __func__);
7585}
7586
8554116e
IK		 7587static size_t max_response_pages(struct nfs_server *server)
7588{
7589 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7590 return nfs_page_array_len(0, max_resp_sz);
7591}
7592
7593static void nfs4_free_pages(struct page **pages, size_t size)
7594{
7595 int i;
7596
7597 if (!pages)
7598 return;
7599
7600 for (i = 0; i < size; i++) {
7601 if (!pages[i])
7602 break;
7603 __free_page(pages[i]);
7604 }
7605 kfree(pages);
7606}
7607
7608static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7609{
7610 struct page **pages;
7611 int i;
7612
7613 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7614 if (!pages) {
7615 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7616 return NULL;
7617 }
7618
7619 for (i = 0; i < size; i++) {
7620 pages[i] = alloc_page(gfp_flags);
7621 if (!pages[i]) {
7622 dprintk("%s: failed to allocate page\n", __func__);
7623 nfs4_free_pages(pages, size);
7624 return NULL;
7625 }
7626 }
7627
7628 return pages;
7629}
7630
b1f69b75
AA		 7631static void nfs4_layoutget_release(void *calldata)
7632{
7633 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7634 struct inode *inode = lgp->args.inode;
7635 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7636 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7637
7638 dprintk("--> %s\n", __func__);
8554116e 7639 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7640 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7641 put_nfs_open_context(lgp->args.ctx);
7642 kfree(calldata);
7643 dprintk("<-- %s\n", __func__);
7644}
7645
7646static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7647 .rpc_call_prepare = nfs4_layoutget_prepare,
7648 .rpc_call_done = nfs4_layoutget_done,
7649 .rpc_release = nfs4_layoutget_release,
7650};
7651
a0b0a6e3
TM		 7652struct pnfs_layout_segment *
7653nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7654{
a47970ff
WAA		 7655 struct inode *inode = lgp->args.inode;
7656 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7657 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7658 struct rpc_task *task;
7659 struct rpc_message msg = {
7660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7661 .rpc_argp = &lgp->args,
7662 .rpc_resp = &lgp->res,
6ab59344 7663 .rpc_cred = lgp->cred,
b1f69b75
AA		 7664 };
7665 struct rpc_task_setup task_setup_data = {
7666 .rpc_client = server->client,
7667 .rpc_message = &msg,
7668 .callback_ops = &nfs4_layoutget_call_ops,
7669 .callback_data = lgp,
7670 .flags = RPC_TASK_ASYNC,
7671 };
a0b0a6e3 7672 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7673 int status = 0;
7674
7675 dprintk("--> %s\n", __func__);
7676
8554116e
IK		 7677 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7678 if (!lgp->args.layout.pages) {
7679 nfs4_layoutget_release(lgp);
a0b0a6e3 7680 return ERR_PTR(-ENOMEM);
8554116e
IK		 7681 }
7682 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7683 lgp->args.timestamp = jiffies;
8554116e 7684
35124a09 7685 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7686 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7687 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7688
7689 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7690 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7691
b1f69b75
AA		 7692 task = rpc_run_task(&task_setup_data);
7693 if (IS_ERR(task))
a0b0a6e3 7694 return ERR_CAST(task);
b1f69b75 7695 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7696 if (status == 0)
7697 status = task->tk_status;
1037e6ea
TM		 7698 trace_nfs4_layoutget(lgp->args.ctx,
7699 &lgp->args.range,
7700 &lgp->res.range,
7701 status);
085b7a45
WAA		 7702 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7703 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7704 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7705 rpc_put_task(task);
7706 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7707 if (status)
7708 return ERR_PTR(status);
7709 return lseg;
b1f69b75
AA		 7710}
7711
cbe82603
BH		 7712static void
7713nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7714{
7715 struct nfs4_layoutreturn *lrp = calldata;
7716
7717 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7718 nfs41_setup_sequence(lrp->clp->cl_session,
7719 &lrp->args.seq_args,
7720 &lrp->res.seq_res,
7721 task);
cbe82603
BH		 7722}
7723
7724static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7725{
7726 struct nfs4_layoutreturn *lrp = calldata;
7727 struct nfs_server *server;
7728
7729 dprintk("--> %s\n", __func__);
7730
6ba7db34 7731 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7732 return;
7733
7734 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7735 switch (task->tk_status) {
7736 default:
7737 task->tk_status = 0;
7738 case 0:
7739 break;
7740 case -NFS4ERR_DELAY:
7741 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7742 break;
d00c5d43 7743 rpc_restart_call_prepare(task);
cbe82603
BH		 7744 return;
7745 }
cbe82603
BH		 7746 dprintk("<-- %s\n", __func__);
7747}
7748
7749static void nfs4_layoutreturn_release(void *calldata)
7750{
7751 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7752 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7753
7754 dprintk("--> %s\n", __func__);
849b286f
TM		 7755 spin_lock(&lo->plh_inode->i_lock);
7756 if (lrp->res.lrs_present)
7757 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7758 lo->plh_block_lgets--;
7759 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7760 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7761 kfree(calldata);
7762 dprintk("<-- %s\n", __func__);
7763}
7764
7765static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7766 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7767 .rpc_call_done = nfs4_layoutreturn_done,
7768 .rpc_release = nfs4_layoutreturn_release,
7769};
7770
7771int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7772{
7773 struct rpc_task *task;
7774 struct rpc_message msg = {
7775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7776 .rpc_argp = &lrp->args,
7777 .rpc_resp = &lrp->res,
9556000d 7778 .rpc_cred = lrp->cred,
cbe82603
BH		 7779 };
7780 struct rpc_task_setup task_setup_data = {
1771c577 7781 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7782 .rpc_message = &msg,
7783 .callback_ops = &nfs4_layoutreturn_call_ops,
7784 .callback_data = lrp,
7785 };
7786 int status;
7787
7788 dprintk("--> %s\n", __func__);
a9c92d6b 7789 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7790 task = rpc_run_task(&task_setup_data);
7791 if (IS_ERR(task))
7792 return PTR_ERR(task);
7793 status = task->tk_status;
1037e6ea 7794 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7795 dprintk("<-- %s status=%d\n", __func__, status);
7796 rpc_put_task(task);
7797 return status;
7798}
7799
7f11d8d3
AA		 7800/*
7801 * Retrieve the list of Data Server devices from the MDS.
7802 */
7803static int _nfs4_getdevicelist(struct nfs_server *server,
7804 const struct nfs_fh *fh,
7805 struct pnfs_devicelist *devlist)
7806{
7807 struct nfs4_getdevicelist_args args = {
7808 .fh = fh,
7809 .layoutclass = server->pnfs_curr_ld->id,
7810 };
7811 struct nfs4_getdevicelist_res res = {
7812 .devlist = devlist,
7813 };
7814 struct rpc_message msg = {
7815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7816 .rpc_argp = &args,
7817 .rpc_resp = &res,
7818 };
7819 int status;
7820
7821 dprintk("--> %s\n", __func__);
7822 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7823 &res.seq_res, 0);
7824 dprintk("<-- %s status=%d\n", __func__, status);
7825 return status;
7826}
7827
7828int nfs4_proc_getdevicelist(struct nfs_server *server,
7829 const struct nfs_fh *fh,
7830 struct pnfs_devicelist *devlist)
7831{
7832 struct nfs4_exception exception = { };
7833 int err;
7834
7835 do {
7836 err = nfs4_handle_exception(server,
7837 _nfs4_getdevicelist(server, fh, devlist),
7838 &exception);
7839 } while (exception.retry);
7840
7841 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7842 err, devlist->num_devs);
7843
7844 return err;
7845}
7846EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7847
b1f69b75 7848static int
cd5875fe
TM		 7849_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7850 struct pnfs_device *pdev,
7851 struct rpc_cred *cred)
b1f69b75
AA		 7852{
7853 struct nfs4_getdeviceinfo_args args = {
7854 .pdev = pdev,
7855 };
7856 struct nfs4_getdeviceinfo_res res = {
7857 .pdev = pdev,
7858 };
7859 struct rpc_message msg = {
7860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7861 .rpc_argp = &args,
7862 .rpc_resp = &res,
cd5875fe 7863 .rpc_cred = cred,
b1f69b75
AA		 7864 };
7865 int status;
7866
7867 dprintk("--> %s\n", __func__);
7c513058 7868 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7869 dprintk("<-- %s status=%d\n", __func__, status);
7870
7871 return status;
7872}
7873
cd5875fe
TM		 7874int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7875 struct pnfs_device *pdev,
7876 struct rpc_cred *cred)
b1f69b75
AA		 7877{
7878 struct nfs4_exception exception = { };
7879 int err;
7880
7881 do {
7882 err = nfs4_handle_exception(server,
cd5875fe 7883 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7884 &exception);
7885 } while (exception.retry);
7886 return err;
7887}
7888EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7889
863a3c6c
AA		 7890static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7891{
7892 struct nfs4_layoutcommit_data *data = calldata;
7893 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7894 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7895
d9afbd1b
TM		 7896 nfs41_setup_sequence(session,
7897 &data->args.seq_args,
7898 &data->res.seq_res,
7899 task);
863a3c6c
AA		 7900}
7901
7902static void
7903nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7904{
7905 struct nfs4_layoutcommit_data *data = calldata;
7906 struct nfs_server *server = NFS_SERVER(data->args.inode);
7907
6ba7db34 7908 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7909 return;
7910
7911 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7912 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7913 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7914 case -NFS4ERR_BADLAYOUT: /* no layout */
7915 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7916 task->tk_status = 0;
e59d27e0 7917 case 0:
e59d27e0
TM		 7918 break;
7919 default:
7920 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7921 rpc_restart_call_prepare(task);
7922 return;
7923 }
7924 }
863a3c6c
AA		 7925}
7926
7927static void nfs4_layoutcommit_release(void *calldata)
7928{
7929 struct nfs4_layoutcommit_data *data = calldata;
7930
db29c089 7931 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7932 nfs_post_op_update_inode_force_wcc(data->args.inode,
7933 data->res.fattr);
863a3c6c
AA		 7934 put_rpccred(data->cred);
7935 kfree(data);
7936}
7937
7938static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7939 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7940 .rpc_call_done = nfs4_layoutcommit_done,
7941 .rpc_release = nfs4_layoutcommit_release,
7942};
7943
7944int
ef311537 7945nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7946{
7947 struct rpc_message msg = {
7948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7949 .rpc_argp = &data->args,
7950 .rpc_resp = &data->res,
7951 .rpc_cred = data->cred,
7952 };
7953 struct rpc_task_setup task_setup_data = {
7954 .task = &data->task,
7955 .rpc_client = NFS_CLIENT(data->args.inode),
7956 .rpc_message = &msg,
7957 .callback_ops = &nfs4_layoutcommit_ops,
7958 .callback_data = data,
7959 .flags = RPC_TASK_ASYNC,
7960 };
7961 struct rpc_task *task;
7962 int status = 0;
7963
7964 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7965 "lbw: %llu inode %lu\n",
7966 data->task.tk_pid, sync,
7967 data->args.lastbytewritten,
7968 data->args.inode->i_ino);
7969
a9c92d6b 7970 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7971 task = rpc_run_task(&task_setup_data);
7972 if (IS_ERR(task))
7973 return PTR_ERR(task);
ef311537 7974 if (sync == false)
863a3c6c
AA		 7975 goto out;
7976 status = nfs4_wait_for_completion_rpc_task(task);
7977 if (status != 0)
7978 goto out;
7979 status = task->tk_status;
1037e6ea 7980 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7981out:
7982 dprintk("%s: status %d\n", __func__, status);
7983 rpc_put_task(task);
7984 return status;
7985}
fca78d6d 7986
97431204
AA		 7987/**
7988 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7989 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7990 */
fca78d6d
BS		 7991static int
7992_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7993 struct nfs_fsinfo *info,
7994 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7995{
7996 struct nfs41_secinfo_no_name_args args = {
7997 .style = SECINFO_STYLE_CURRENT_FH,
7998 };
7999 struct nfs4_secinfo_res res = {
8000 .flavors = flavors,
8001 };
8002 struct rpc_message msg = {
8003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8004 .rpc_argp = &args,
8005 .rpc_resp = &res,
8006 };
b1b3e136 8007 struct rpc_clnt *clnt = server->client;
7cb852df 8008 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8009 int status;
8010
8011 if (use_integrity) {
8012 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8013 cred = nfs4_get_clid_cred(server->nfs_client);
8014 msg.rpc_cred = cred;
b1b3e136
WAA		 8015 }
8016
8017 dprintk("--> %s\n", __func__);
8018 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8019 &res.seq_res, 0);
8020 dprintk("<-- %s status=%d\n", __func__, status);
8021
7cb852df
WAA		 8022 if (cred)
8023 put_rpccred(cred);
b1b3e136
WAA		 8024
8025 return status;
fca78d6d
BS		 8026}
8027
8028static int
8029nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8030 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8031{
8032 struct nfs4_exception exception = { };
8033 int err;
8034 do {
b1b3e136
WAA		 8035 /* first try using integrity protection */
8036 err = -NFS4ERR_WRONGSEC;
8037
8038 /* try to use integrity protection with machine cred */
8039 if (_nfs4_is_integrity_protected(server->nfs_client))
8040 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8041 flavors, true);
8042
8043 /*
8044 * if unable to use integrity protection, or SECINFO with
8045 * integrity protection returns NFS4ERR_WRONGSEC (which is
8046 * disallowed by spec, but exists in deployed servers) use
8047 * the current filesystem's rpc_client and the user cred.
8048 */
8049 if (err == -NFS4ERR_WRONGSEC)
8050 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8051 flavors, false);
8052
fca78d6d
BS		 8053 switch (err) {
8054 case 0:
8055 case -NFS4ERR_WRONGSEC:
78b19bae 8056 case -ENOTSUPP:
05e9cfb4 8057 goto out;
fca78d6d
BS		 8058 default:
8059 err = nfs4_handle_exception(server, err, &exception);
8060 }
8061 } while (exception.retry);
05e9cfb4 8062out:
fca78d6d
BS		 8063 return err;
8064}
8065
8066static int
8067nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8068 struct nfs_fsinfo *info)
8069{
8070 int err;
8071 struct page *page;
367156d9 8072 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8073 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8074 struct nfs4_secinfo4 *secinfo;
8075 int i;
fca78d6d
BS		 8076
8077 page = alloc_page(GFP_KERNEL);
8078 if (!page) {
8079 err = -ENOMEM;
8080 goto out;
8081 }
8082
8083 flavors = page_address(page);
8084 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8085
8086 /*
8087 * Fall back on "guess and check" method if
8088 * the server doesn't support SECINFO_NO_NAME
8089 */
78b19bae 8090 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8091 err = nfs4_find_root_sec(server, fhandle, info);
8092 goto out_freepage;
8093 }
8094 if (err)
8095 goto out_freepage;
8096
58a8cf12
WAA		 8097 for (i = 0; i < flavors->num_flavors; i++) {
8098 secinfo = &flavors->flavors[i];
8099
8100 switch (secinfo->flavor) {
8101 case RPC_AUTH_NULL:
8102 case RPC_AUTH_UNIX:
8103 case RPC_AUTH_GSS:
8104 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8105 &secinfo->flavor_info);
8106 break;
8107 default:
8108 flavor = RPC_AUTH_MAXFLAVOR;
8109 break;
8110 }
8111
4d4b69dd
WAA		 8112 if (!nfs_auth_info_match(&server->auth_info, flavor))
8113 flavor = RPC_AUTH_MAXFLAVOR;
8114
58a8cf12
WAA		 8115 if (flavor != RPC_AUTH_MAXFLAVOR) {
8116 err = nfs4_lookup_root_sec(server, fhandle,
8117 info, flavor);
8118 if (!err)
8119 break;
8120 }
8121 }
8122
8123 if (flavor == RPC_AUTH_MAXFLAVOR)
8124 err = -EPERM;
fca78d6d
BS		 8125
8126out_freepage:
8127 put_page(page);
8128 if (err == -EACCES)
8129 return -EPERM;
8130out:
8131 return err;
8132}
1cab0652 8133
ab7cb0df
TM		 8134static int _nfs41_test_stateid(struct nfs_server *server,
8135 nfs4_stateid *stateid,
8136 struct rpc_cred *cred)
7d974794
BS		 8137{
8138 int status;
8139 struct nfs41_test_stateid_args args = {
1cab0652 8140 .stateid = stateid,
7d974794
BS		 8141 };
8142 struct nfs41_test_stateid_res res;
8143 struct rpc_message msg = {
8144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8145 .rpc_argp = &args,
8146 .rpc_resp = &res,
ab7cb0df 8147 .rpc_cred = cred,
7d974794 8148 };
3787d506
WAA		 8149 struct rpc_clnt *rpc_client = server->client;
8150
8151 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8152 &rpc_client, &msg);
1cab0652 8153
38527b15 8154 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8155 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8156 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8157 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8158 &args.seq_args, &res.seq_res);
38527b15
CL		 8159 if (status != NFS_OK) {
8160 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8161 return status;
38527b15
CL		 8162 }
8163 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8164 return -res.status;
7d974794
BS		 8165}
8166
38527b15
CL		 8167/**
8168 * nfs41_test_stateid - perform a TEST_STATEID operation
8169 *
8170 * @server: server / transport on which to perform the operation
8171 * @stateid: state ID to test
ab7cb0df 8172 * @cred: credential
38527b15
CL		 8173 *
8174 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8175 * Otherwise a negative NFS4ERR value is returned if the operation
8176 * failed or the state ID is not currently valid.
8177 */
ab7cb0df
TM		 8178static int nfs41_test_stateid(struct nfs_server *server,
8179 nfs4_stateid *stateid,
8180 struct rpc_cred *cred)
7d974794
BS		 8181{
8182 struct nfs4_exception exception = { };
8183 int err;
8184 do {
ab7cb0df 8185 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8186 if (err != -NFS4ERR_DELAY)
8187 break;
8188 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8189 } while (exception.retry);
8190 return err;
8191}
9aeda35f 8192
7c1d5fae
TM		 8193struct nfs_free_stateid_data {
8194 struct nfs_server *server;
8195 struct nfs41_free_stateid_args args;
9aeda35f 8196 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8197};
8198
8199static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8200{
8201 struct nfs_free_stateid_data *data = calldata;
8202 nfs41_setup_sequence(nfs4_get_session(data->server),
8203 &data->args.seq_args,
8204 &data->res.seq_res,
8205 task);
8206}
8207
8208static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8209{
8210 struct nfs_free_stateid_data *data = calldata;
8211
8212 nfs41_sequence_done(task, &data->res.seq_res);
8213
8214 switch (task->tk_status) {
8215 case -NFS4ERR_DELAY:
8216 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8217 rpc_restart_call_prepare(task);
8218 }
8219}
8220
8221static void nfs41_free_stateid_release(void *calldata)
8222{
8223 kfree(calldata);
8224}
8225
17f26b12 8226static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8227 .rpc_call_prepare = nfs41_free_stateid_prepare,
8228 .rpc_call_done = nfs41_free_stateid_done,
8229 .rpc_release = nfs41_free_stateid_release,
8230};
8231
8232static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8233 nfs4_stateid *stateid,
ab7cb0df 8234 struct rpc_cred *cred,
7c1d5fae
TM		 8235 bool privileged)
8236{
9aeda35f
BS		 8237 struct rpc_message msg = {
8238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8239 .rpc_cred = cred,
9aeda35f 8240 };
7c1d5fae
TM		 8241 struct rpc_task_setup task_setup = {
8242 .rpc_client = server->client,
8243 .rpc_message = &msg,
8244 .callback_ops = &nfs41_free_stateid_ops,
8245 .flags = RPC_TASK_ASYNC,
8246 };
8247 struct nfs_free_stateid_data *data;
9aeda35f 8248
3787d506
WAA		 8249 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8250 &task_setup.rpc_client, &msg);
8251
38527b15 8252 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8253 data = kmalloc(sizeof(*data), GFP_NOFS);
8254 if (!data)
8255 return ERR_PTR(-ENOMEM);
8256 data->server = server;
8257 nfs4_stateid_copy(&data->args.stateid, stateid);
8258
8259 task_setup.callback_data = data;
8260
8261 msg.rpc_argp = &data->args;
8262 msg.rpc_resp = &data->res;
a9c92d6b 8263 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8264 if (privileged)
8265 nfs4_set_sequence_privileged(&data->args.seq_args);
8266
8267 return rpc_run_task(&task_setup);
9aeda35f
BS		 8268}
8269
38527b15
CL		 8270/**
8271 * nfs41_free_stateid - perform a FREE_STATEID operation
8272 *
8273 * @server: server / transport on which to perform the operation
8274 * @stateid: state ID to release
ab7cb0df 8275 * @cred: credential
38527b15
CL		 8276 *
8277 * Returns NFS_OK if the server freed "stateid". Otherwise a
8278 * negative NFS4ERR value is returned.
8279 */
ab7cb0df
TM		 8280static int nfs41_free_stateid(struct nfs_server *server,
8281 nfs4_stateid *stateid,
8282 struct rpc_cred *cred)
9aeda35f 8283{
7c1d5fae
TM		 8284 struct rpc_task *task;
8285 int ret;
8286
ab7cb0df 8287 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8288 if (IS_ERR(task))
8289 return PTR_ERR(task);
8290 ret = rpc_wait_for_completion_task(task);
8291 if (!ret)
8292 ret = task->tk_status;
8293 rpc_put_task(task);
8294 return ret;
9aeda35f 8295}
36281caa 8296
f1cdae87
JL		 8297static void
8298nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8299{
8300 struct rpc_task *task;
ab7cb0df 8301 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8302
ab7cb0df 8303 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8304 nfs4_free_lock_state(server, lsp);
8305 if (IS_ERR(task))
f1cdae87 8306 return;
c8b2d0bf 8307 rpc_put_task(task);
c8b2d0bf
TM		 8308}
8309
36281caa
TM		 8310static bool nfs41_match_stateid(const nfs4_stateid *s1,
8311 const nfs4_stateid *s2)
8312{
2d2f24ad 8313 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8314 return false;
8315
2d2f24ad 8316 if (s1->seqid == s2->seqid)
36281caa 8317 return true;
2d2f24ad 8318 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8319 return true;
8320
8321 return false;
8322}
8323
557134a3
AA		 8324#endif /* CONFIG_NFS_V4_1 */
8325
36281caa
TM		 8326static bool nfs4_match_stateid(const nfs4_stateid *s1,
8327 const nfs4_stateid *s2)
8328{
f597c537 8329 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8330}
8331
8332
17280175 8333static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8334 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8335 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8336 .recover_open = nfs4_open_reclaim,
8337 .recover_lock = nfs4_lock_reclaim,
591d71cb 8338 .establish_clid = nfs4_init_clientid,
05f4c350 8339 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8340};
8341
591d71cb 8342#if defined(CONFIG_NFS_V4_1)
17280175 8343static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8344 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8345 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8346 .recover_open = nfs4_open_reclaim,
8347 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8348 .establish_clid = nfs41_init_clientid,
fce5c838 8349 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8350 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8351};
8352#endif /* CONFIG_NFS_V4_1 */
8353
17280175 8354static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8355 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8356 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8357 .recover_open = nfs4_open_expired,
8358 .recover_lock = nfs4_lock_expired,
8359 .establish_clid = nfs4_init_clientid,
8360};
8361
8362#if defined(CONFIG_NFS_V4_1)
17280175 8363static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8364 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8365 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8366 .recover_open = nfs41_open_expired,
8367 .recover_lock = nfs41_lock_expired,
4d643d1d 8368 .establish_clid = nfs41_init_clientid,
1da177e4 8369};
591d71cb 8370#endif /* CONFIG_NFS_V4_1 */
1da177e4 8371
17280175 8372static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8373 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8374 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8375 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8376};
8377
8378#if defined(CONFIG_NFS_V4_1)
17280175 8379static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8380 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8381 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8382 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8383};
8384#endif
8385
ec011fe8 8386static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8387 .get_locations = _nfs40_proc_get_locations,
44c99933 8388 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8389};
8390
8391#if defined(CONFIG_NFS_V4_1)
8392static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8393 .get_locations = _nfs41_proc_get_locations,
44c99933 8394 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8395};
8396#endif /* CONFIG_NFS_V4_1 */
8397
97dc1359
TM		 8398static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8399 .minor_version = 0,
39c6daae
TM		 8400 .init_caps = NFS_CAP_READDIRPLUS
8401 | NFS_CAP_ATOMIC_OPEN
8402 | NFS_CAP_CHANGE_ATTR
8403 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8404 .init_client = nfs40_init_client,
8405 .shutdown_client = nfs40_shutdown_client,
36281caa 8406 .match_stateid = nfs4_match_stateid,
fca78d6d 8407 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8408 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8409 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8410 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8411 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8412 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8413 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8414};
8415
8416#if defined(CONFIG_NFS_V4_1)
8417static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8418 .minor_version = 1,
39c6daae
TM		 8419 .init_caps = NFS_CAP_READDIRPLUS
8420 | NFS_CAP_ATOMIC_OPEN
8421 | NFS_CAP_CHANGE_ATTR
3b66486c 8422 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8423 | NFS_CAP_STATEID_NFSV41
8424 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8425 .init_client = nfs41_init_client,
8426 .shutdown_client = nfs41_shutdown_client,
36281caa 8427 .match_stateid = nfs41_match_stateid,
fca78d6d 8428 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8429 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8430 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8431 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8432 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8433 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8434 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8435};
8436#endif
8437
42c2c424
SD		 8438#if defined(CONFIG_NFS_V4_2)
8439static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8440 .minor_version = 2,
7017310a
BS		 8441 .init_caps = NFS_CAP_READDIRPLUS
8442 | NFS_CAP_ATOMIC_OPEN
8443 | NFS_CAP_CHANGE_ATTR
8444 | NFS_CAP_POSIX_LOCK
8445 | NFS_CAP_STATEID_NFSV41
8446 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8447 .init_client = nfs41_init_client,
8448 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8449 .match_stateid = nfs41_match_stateid,
8450 .find_root_sec = nfs41_find_root_sec,
7017310a 8451 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8452 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8453 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8454 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8455 .state_renewal_ops = &nfs41_state_renewal_ops,
8456};
8457#endif
8458
97dc1359
TM		 8459const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8460 [0] = &nfs_v4_0_minor_ops,
8461#if defined(CONFIG_NFS_V4_1)
8462 [1] = &nfs_v4_1_minor_ops,
8463#endif
42c2c424
SD		 8464#if defined(CONFIG_NFS_V4_2)
8465 [2] = &nfs_v4_2_minor_ops,
8466#endif
97dc1359
TM		 8467};
8468
17f26b12 8469static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8470 .create = nfs_create,
8471 .lookup = nfs_lookup,
8472 .atomic_open = nfs_atomic_open,
8473 .link = nfs_link,
8474 .unlink = nfs_unlink,
8475 .symlink = nfs_symlink,
8476 .mkdir = nfs_mkdir,
8477 .rmdir = nfs_rmdir,
8478 .mknod = nfs_mknod,
8479 .rename = nfs_rename,
8480 .permission = nfs_permission,
8481 .getattr = nfs_getattr,
8482 .setattr = nfs_setattr,
8483 .getxattr = generic_getxattr,
8484 .setxattr = generic_setxattr,
8485 .listxattr = generic_listxattr,
8486 .removexattr = generic_removexattr,
8487};
8488
92e1d5be 8489static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8490 .permission = nfs_permission,
8491 .getattr = nfs_getattr,
8492 .setattr = nfs_setattr,
64c2ce8b
AK		 8493 .getxattr = generic_getxattr,
8494 .setxattr = generic_setxattr,
8495 .listxattr = generic_listxattr,
8496 .removexattr = generic_removexattr,
6b3b5496
BF		 8497};
8498
509de811 8499const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8500 .version = 4, /* protocol version */
8501 .dentry_ops = &nfs4_dentry_operations,
8502 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8503 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8504 .file_ops = &nfs4_file_operations,
1da177e4 8505 .getroot = nfs4_proc_get_root,
281cad46 8506 .submount = nfs4_submount,
ff9099f2 8507 .try_mount = nfs4_try_mount,
1da177e4
LT		 8508 .getattr = nfs4_proc_getattr,
8509 .setattr = nfs4_proc_setattr,
8510 .lookup = nfs4_proc_lookup,
8511 .access = nfs4_proc_access,
8512 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8513 .create = nfs4_proc_create,
8514 .remove = nfs4_proc_remove,
8515 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8516 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8517 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8518 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8519 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8520 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8521 .link = nfs4_proc_link,
8522 .symlink = nfs4_proc_symlink,
8523 .mkdir = nfs4_proc_mkdir,
8524 .rmdir = nfs4_proc_remove,
8525 .readdir = nfs4_proc_readdir,
8526 .mknod = nfs4_proc_mknod,
8527 .statfs = nfs4_proc_statfs,
8528 .fsinfo = nfs4_proc_fsinfo,
8529 .pathconf = nfs4_proc_pathconf,
e9326dca 8530 .set_capabilities = nfs4_server_capabilities,
1da177e4 8531 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8532 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8533 .read_setup = nfs4_proc_read_setup,
ec06c096 8534 .read_done = nfs4_read_done,
1da177e4 8535 .write_setup = nfs4_proc_write_setup,
788e7a89 8536 .write_done = nfs4_write_done,
1da177e4 8537 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8538 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8539 .commit_done = nfs4_commit_done,
1da177e4 8540 .lock = nfs4_proc_lock,
e50a1c2e 8541 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8542 .close_context = nfs4_close_context,
2b484297 8543 .open_context = nfs4_atomic_open,
011e2a7f 8544 .have_delegation = nfs4_have_delegation,
57ec14c5 8545 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8546 .alloc_client = nfs4_alloc_client,
45a52a02 8547 .init_client = nfs4_init_client,
cdb7eced 8548 .free_client = nfs4_free_client,
1179acc6
BS		 8549 .create_server = nfs4_create_server,
8550 .clone_server = nfs_clone_server,
1da177e4
LT		 8551};
8552
64c2ce8b
AK		 8553static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8554 .prefix = XATTR_NAME_NFSV4_ACL,
8555 .list = nfs4_xattr_list_nfs4_acl,
8556 .get = nfs4_xattr_get_nfs4_acl,
8557 .set = nfs4_xattr_set_nfs4_acl,
8558};
8559
8560const struct xattr_handler *nfs4_xattr_handlers[] = {
8561 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8562#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8563 &nfs4_xattr_nfs4_label_handler,
8564#endif
64c2ce8b
AK		 8565 NULL
8566};
8567
1da177e4
LT		 8568/*
8569 * Local variables:
8570 * c-basic-offset: 8
8571 * End:
8572 */
Linux 6.x block layer and io_uring tree(s)