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nfs4: add nfs4_check_delegation
[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);
2227 if (ret != 0)
2228 goto out;
2229
2230 state = nfs4_opendata_to_nfs4_state(opendata);
2231 ret = PTR_ERR(state);
2232 if (IS_ERR(state))
2233 goto out;
2234 if (server->caps & NFS_CAP_POSIX_LOCK)
2235 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2236
275bb307
TM		 2237 dentry = opendata->dentry;
2238 if (dentry->d_inode == NULL) {
2239 /* FIXME: Is this d_drop() ever needed? */
2240 d_drop(dentry);
2241 dentry = d_add_unique(dentry, igrab(state->inode));
2242 if (dentry == NULL) {
2243 dentry = opendata->dentry;
2244 } else if (dentry != ctx->dentry) {
2245 dput(ctx->dentry);
2246 ctx->dentry = dget(dentry);
2247 }
2248 nfs_set_verifier(dentry,
2249 nfs_save_change_attribute(opendata->dir->d_inode));
2250 }
2251
c21443c2
TM		 2252 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2253 if (ret != 0)
2254 goto out;
2255
3efb9722 2256 ctx->state = state;
c45ffdd2
TM		 2257 if (dentry->d_inode == state->inode) {
2258 nfs_inode_attach_open_context(ctx);
2259 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2260 nfs4_schedule_stateid_recovery(server, state);
2261 }
c21443c2
TM		 2262out:
2263 return ret;
2264}
2265
1da177e4 2266/*
24ac23ab 2267 * Returns a referenced nfs4_state
1da177e4 2268 */
82be417a 2269static int _nfs4_do_open(struct inode *dir,
4197a055 2270 struct nfs_open_context *ctx,
82be417a
AA		 2271 int flags,
2272 struct iattr *sattr,
5bc2afc2
TM		 2273 struct nfs4_label *label,
2274 int *opened)
1da177e4
LT		 2275{
2276 struct nfs4_state_owner *sp;
2277 struct nfs4_state *state = NULL;
2278 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2279 struct nfs4_opendata *opendata;
4197a055
TM		 2280 struct dentry *dentry = ctx->dentry;
2281 struct rpc_cred *cred = ctx->cred;
2282 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2283 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2284 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2285 struct nfs4_label *olabel = NULL;
aac00a8d 2286 int status;
1da177e4
LT		 2287
2288 /* Protect against reboot recovery conflicts */
1da177e4 2289 status = -ENOMEM;
d1e284d5
TM		 2290 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2291 if (sp == NULL) {
1da177e4
LT		 2292 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2293 goto out_err;
2294 }
58d9714a
TM		 2295 status = nfs4_recover_expired_lease(server);
2296 if (status != 0)
b4454fe1 2297 goto err_put_state_owner;
82a2c1b7
AV		 2298 if (dentry->d_inode != NULL)
2299 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2300 status = -ENOMEM;
49f9a0fa
TM		 2301 if (dentry->d_inode)
2302 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2303 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2304 label, claim, GFP_KERNEL);
e56e0b78 2305 if (opendata == NULL)
95d35cb4 2306 goto err_put_state_owner;
1da177e4 2307
14c43f76
DQ		 2308 if (label) {
2309 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2310 if (IS_ERR(olabel)) {
2311 status = PTR_ERR(olabel);
2312 goto err_opendata_put;
2313 }
2314 }
2315
e911b815
TM		 2316 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2317 if (!opendata->f_attr.mdsthreshold) {
2318 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2319 if (!opendata->f_attr.mdsthreshold)
2320 goto err_free_label;
2321 }
1549210f 2322 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2323 }
82a2c1b7
AV		 2324 if (dentry->d_inode != NULL)
2325 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2326
3efb9722 2327 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2328 if (status != 0)
14c43f76 2329 goto err_free_label;
3efb9722 2330 state = ctx->state;
6168f62c 2331
549b19cc
TM		 2332 if ((opendata->o_arg.open_flags & O_EXCL) &&
2333 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2334 nfs4_exclusive_attrset(opendata, sattr);
2335
2336 nfs_fattr_init(opendata->o_res.f_attr);
2337 status = nfs4_do_setattr(state->inode, cred,
2338 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2339 state, label, olabel);
2340 if (status == 0) {
0ab64e0e 2341 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2342 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2343 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2344 }
0ab64e0e 2345 }
5bc2afc2
TM		 2346 if (opendata->file_created)
2347 *opened |= FILE_CREATED;
82be417a 2348
e911b815 2349 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2350 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2351 opendata->f_attr.mdsthreshold = NULL;
2352 }
82be417a 2353
14c43f76
DQ		 2354 nfs4_label_free(olabel);
2355
c6d00e63 2356 nfs4_opendata_put(opendata);
1da177e4 2357 nfs4_put_state_owner(sp);
1da177e4 2358 return 0;
14c43f76
DQ		 2359err_free_label:
2360 nfs4_label_free(olabel);
c6d00e63
TM		 2361err_opendata_put:
2362 nfs4_opendata_put(opendata);
e56e0b78
TM		 2363err_put_state_owner:
2364 nfs4_put_state_owner(sp);
1da177e4 2365out_err:
1da177e4
LT		 2366 return status;
2367}
2368
2369
82be417a 2370static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2371 struct nfs_open_context *ctx,
82be417a
AA		 2372 int flags,
2373 struct iattr *sattr,
5bc2afc2
TM		 2374 struct nfs4_label *label,
2375 int *opened)
1da177e4 2376{
49f9a0fa 2377 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2378 struct nfs4_exception exception = { };
2379 struct nfs4_state *res;
2380 int status;
2381
2382 do {
5bc2afc2 2383 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2384 res = ctx->state;
42113a75 2385 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2386 if (status == 0)
2387 break;
2388 /* NOTE: BAD_SEQID means the server and client disagree about the
2389 * book-keeping w.r.t. state-changing operations
2390 * (OPEN/CLOSE/LOCK/LOCKU...)
2391 * It is actually a sign of a bug on the client or on the server.
2392 *
2393 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2394 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2395 * have unhashed the old state_owner for us, and that we can
2396 * therefore safely retry using a new one. We should still warn
2397 * the user though...
2398 */
2399 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2400 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2401 " returned a bad sequence-id error!\n",
2402 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2403 exception.retry = 1;
2404 continue;
2405 }
550f5747
TM		 2406 /*
2407 * BAD_STATEID on OPEN means that the server cancelled our
2408 * state before it received the OPEN_CONFIRM.
2409 * Recover by retrying the request as per the discussion
2410 * on Page 181 of RFC3530.
2411 */
2412 if (status == -NFS4ERR_BAD_STATEID) {
2413 exception.retry = 1;
2414 continue;
2415 }
aac00a8d
TM		 2416 if (status == -EAGAIN) {
2417 /* We must have found a delegation */
2418 exception.retry = 1;
2419 continue;
2420 }
49f9a0fa
TM		 2421 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2422 continue;
2423 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2424 status, &exception));
2425 } while (exception.retry);
2426 return res;
2427}
2428
659bfcd6
TM		 2429static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2430 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2431 struct nfs4_state *state, struct nfs4_label *ilabel,
2432 struct nfs4_label *olabel)
1da177e4 2433{
3e4f6290 2434 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2435 struct nfs_setattrargs arg = {
3e4f6290 2436 .fh = NFS_FH(inode),
1da177e4
LT		 2437 .iap = sattr,
2438 .server = server,
2439 .bitmask = server->attr_bitmask,
1775fd3e 2440 .label = ilabel,
1da177e4
LT		 2441 };
2442 struct nfs_setattrres res = {
2443 .fattr = fattr,
1775fd3e 2444 .label = olabel,
1da177e4
LT		 2445 .server = server,
2446 };
2447 struct rpc_message msg = {
659bfcd6
TM		 2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2449 .rpc_argp = &arg,
2450 .rpc_resp = &res,
2451 .rpc_cred = cred,
1da177e4 2452 };
26e976a8 2453 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2454 fmode_t fmode;
2455 bool truncate;
65e4308d 2456 int status;
1da177e4 2457
aa9c2669
DQ		 2458 arg.bitmask = nfs4_bitmask(server, ilabel);
2459 if (ilabel)
2460 arg.bitmask = nfs4_bitmask(server, olabel);
2461
0e574af1 2462 nfs_fattr_init(fattr);
1da177e4 2463
ee3ae84e
TM		 2464 /* Servers should only apply open mode checks for file size changes */
2465 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2466 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2467
2468 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2469 /* Use that stateid */
0418dae1 2470 } else if (truncate && state != NULL) {
2a369153
TM		 2471 struct nfs_lockowner lockowner = {
2472 .l_owner = current->files,
2473 .l_pid = current->tgid,
2474 };
0418dae1
TM		 2475 if (!nfs4_valid_open_stateid(state))
2476 return -EBADF;
2477 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2478 &lockowner) == -EIO)
2479 return -EBADF;
08e9eac4 2480 } else
f597c537 2481 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2482
7c513058 2483 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2484 if (status == 0 && state != NULL)
2485 renew_lease(server, timestamp);
65e4308d 2486 return status;
1da177e4
LT		 2487}
2488
659bfcd6
TM		 2489static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2490 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2491 struct nfs4_state *state, struct nfs4_label *ilabel,
2492 struct nfs4_label *olabel)
1da177e4 2493{
3e4f6290 2494 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2495 struct nfs4_exception exception = {
2496 .state = state,
3114ea7a 2497 .inode = inode,
a1d0b5ee 2498 };
1da177e4
LT		 2499 int err;
2500 do {
1775fd3e 2501 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2502 trace_nfs4_setattr(inode, err);
451146be
TM		 2503 switch (err) {
2504 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2505 if (!(sattr->ia_valid & ATTR_SIZE)) {
2506 pr_warn_once("NFSv4: server %s is incorrectly "
2507 "applying open mode checks to "
2508 "a SETATTR that is not "
2509 "changing file size.\n",
2510 server->nfs_client->cl_hostname);
2511 }
451146be
TM		 2512 if (state && !(state->state & FMODE_WRITE)) {
2513 err = -EBADF;
2514 if (sattr->ia_valid & ATTR_OPEN)
2515 err = -EACCES;
2516 goto out;
2517 }
2518 }
2519 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2520 } while (exception.retry);
451146be 2521out:
1da177e4
LT		 2522 return err;
2523}
2524
2525struct nfs4_closedata {
2526 struct inode *inode;
2527 struct nfs4_state *state;
2528 struct nfs_closeargs arg;
2529 struct nfs_closeres res;
516a6af6 2530 struct nfs_fattr fattr;
26e976a8 2531 unsigned long timestamp;
f7e8917a
FI		 2532 bool roc;
2533 u32 roc_barrier;
1da177e4
LT		 2534};
2535
963d8fe5 2536static void nfs4_free_closedata(void *data)
9512135d 2537{
963d8fe5
TM		 2538 struct nfs4_closedata *calldata = data;
2539 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2540 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2541
f7e8917a
FI		 2542 if (calldata->roc)
2543 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2544 nfs4_put_open_state(calldata->state);
2545 nfs_free_seqid(calldata->arg.seqid);
9512135d 2546 nfs4_put_state_owner(sp);
322b2b90 2547 nfs_sb_deactive(sb);
9512135d
TM		 2548 kfree(calldata);
2549}
2550
963d8fe5 2551static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2552{
963d8fe5 2553 struct nfs4_closedata *calldata = data;
1da177e4 2554 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2555 struct nfs_server *server = NFS_SERVER(calldata->inode);
2556
a3ca5651 2557 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2558 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2559 return;
42113a75 2560 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2561 /* hmm. we are done with the inode, and in the process of freeing
2562 * the state_owner. we keep this around to process errors
2563 */
1da177e4
LT		 2564 switch (task->tk_status) {
2565 case 0:
f7e8917a
FI		 2566 if (calldata->roc)
2567 pnfs_roc_set_barrier(state->inode,
2568 calldata->roc_barrier);
226056c5 2569 nfs_clear_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2570 renew_lease(server, calldata->timestamp);
226056c5 2571 goto out_release;
69794ad7 2572 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2573 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2574 case -NFS4ERR_OLD_STATEID:
2575 case -NFS4ERR_BAD_STATEID:
1da177e4 2576 case -NFS4ERR_EXPIRED:
dc0b027d 2577 if (calldata->arg.fmode == 0)
9e33bed5 2578 break;
1da177e4 2579 default:
69794ad7 2580 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2581 rpc_restart_call_prepare(task);
69794ad7
TM		 2582 goto out_release;
2583 }
1da177e4 2584 }
226056c5 2585 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode);
69794ad7 2586out_release:
72211dbe 2587 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2588 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2589 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2590}
2591
4ce70ada 2592static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2593{
4ce70ada 2594 struct nfs4_closedata *calldata = data;
9512135d 2595 struct nfs4_state *state = calldata->state;
7fdab069 2596 struct inode *inode = calldata->inode;
88069f77 2597 int call_close = 0;
9512135d 2598
a3ca5651 2599 dprintk("%s: begin!\n", __func__);
963d8fe5 2600 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2601 goto out_wait;
003707c7 2602
88069f77
TM		 2603 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2604 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2605 spin_lock(&state->owner->so_lock);
003707c7 2606 /* Calculate the change in open mode */
e7616923 2607 if (state->n_rdwr == 0) {
003707c7 2608 if (state->n_rdonly == 0) {
88069f77
TM		 2609 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2610 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2611 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2612 }
2613 if (state->n_wronly == 0) {
88069f77
TM		 2614 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2615 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2616 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2617 }
e7616923 2618 }
5d422301
TM		 2619 if (!nfs4_valid_open_stateid(state))
2620 call_close = 0;
4cecb76f 2621 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2622
2623 if (!call_close) {
963d8fe5 2624 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2625 goto out_no_action;
9512135d 2626 }
88069f77 2627
f7e8917a 2628 if (calldata->arg.fmode == 0) {
88069f77 2629 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2630 if (calldata->roc &&
b9536ad5
AA		 2631 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2632 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2633 goto out_wait;
b9536ad5 2634 }
f7e8917a 2635 }
88069f77 2636
516a6af6 2637 nfs_fattr_init(calldata->res.fattr);
26e976a8 2638 calldata->timestamp = jiffies;
7fdab069 2639 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2640 &calldata->arg.seq_args,
2641 &calldata->res.seq_res,
2240a9e2
TM		 2642 task) != 0)
2643 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2644 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2645 return;
2646out_no_action:
2647 task->tk_action = NULL;
2648out_wait:
2649 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2650}
2651
963d8fe5 2652static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2653 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2654 .rpc_call_done = nfs4_close_done,
2655 .rpc_release = nfs4_free_closedata,
2656};
2657
1da177e4
LT		 2658/*
2659 * It is possible for data to be read/written from a mem-mapped file
2660 * after the sys_close call (which hits the vfs layer as a flush).
2661 * This means that we can't safely call nfsv4 close on a file until
2662 * the inode is cleared. This in turn means that we are not good
2663 * NFSv4 citizens - we do not indicate to the server to update the file's
2664 * share state even when we are done with one of the three share
2665 * stateid's in the inode.
2666 *
2667 * NOTE: Caller must be holding the sp->so_owner semaphore!
2668 */
1f7977c1 2669int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2670{
4a35bd41 2671 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2672 struct nfs4_closedata *calldata;
b39e625b
TM		 2673 struct nfs4_state_owner *sp = state->owner;
2674 struct rpc_task *task;
5138fde0
TM		 2675 struct rpc_message msg = {
2676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2677 .rpc_cred = state->owner->so_cred,
2678 };
c970aa85
TM		 2679 struct rpc_task_setup task_setup_data = {
2680 .rpc_client = server->client,
5138fde0 2681 .rpc_message = &msg,
c970aa85 2682 .callback_ops = &nfs4_close_ops,
101070ca 2683 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2684 .flags = RPC_TASK_ASYNC,
2685 };
9512135d 2686 int status = -ENOMEM;
1da177e4 2687
fa940720
WAA		 2688 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2689 &task_setup_data.rpc_client, &msg);
2690
8535b2be 2691 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2692 if (calldata == NULL)
9512135d 2693 goto out;
a9c92d6b 2694 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2695 calldata->inode = state->inode;
1da177e4 2696 calldata->state = state;
4a35bd41 2697 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2698 calldata->arg.stateid = &state->open_stateid;
1da177e4 2699 /* Serialization for the sequence id */
8535b2be 2700 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2701 if (calldata->arg.seqid == NULL)
2702 goto out_free_calldata;
dc0b027d 2703 calldata->arg.fmode = 0;
a65318bf 2704 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2705 calldata->res.fattr = &calldata->fattr;
c1d51931 2706 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2707 calldata->res.server = server;
1f7977c1 2708 calldata->roc = pnfs_roc(state->inode);
643168c2 2709 nfs_sb_active(calldata->inode->i_sb);
9512135d 2710
1174dd1f
TM		 2711 msg.rpc_argp = &calldata->arg;
2712 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2713 task_setup_data.callback_data = calldata;
2714 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2715 if (IS_ERR(task))
2716 return PTR_ERR(task);
a49c3c77
TM		 2717 status = 0;
2718 if (wait)
2719 status = rpc_wait_for_completion_task(task);
b39e625b 2720 rpc_put_task(task);
a49c3c77 2721 return status;
9512135d
TM		 2722out_free_calldata:
2723 kfree(calldata);
2724out:
b39e625b
TM		 2725 nfs4_put_open_state(state);
2726 nfs4_put_state_owner(sp);
9512135d 2727 return status;
1da177e4
LT		 2728}
2729
2b484297 2730static struct inode *
5bc2afc2
TM		 2731nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2732 int open_flags, struct iattr *attr, int *opened)
1da177e4 2733{
1da177e4 2734 struct nfs4_state *state;
aa9c2669
DQ		 2735 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2736
2737 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2738
565277f6 2739 /* Protect against concurrent sillydeletes */
5bc2afc2 2740 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2741
2742 nfs4_label_release_security(label);
2743
f46e0bd3
TM		 2744 if (IS_ERR(state))
2745 return ERR_CAST(state);
275bb307 2746 return state->inode;
1da177e4
LT		 2747}
2748
1185a552 2749static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2750{
2751 if (ctx->state == NULL)
2752 return;
2753 if (is_sync)
643168c2 2754 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2755 else
643168c2 2756 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2757}
1da177e4 2758
b944dba3
TM		 2759#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2760#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2761#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2762
1da177e4
LT		 2763static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2764{
43652ad5
BH		 2765 struct nfs4_server_caps_arg args = {
2766 .fhandle = fhandle,
2767 };
1da177e4
LT		 2768 struct nfs4_server_caps_res res = {};
2769 struct rpc_message msg = {
2770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2771 .rpc_argp = &args,
1da177e4
LT		 2772 .rpc_resp = &res,
2773 };
2774 int status;
2775
7c513058 2776 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2777 if (status == 0) {
b944dba3
TM		 2778 /* Sanity check the server answers */
2779 switch (server->nfs_client->cl_minorversion) {
2780 case 0:
2781 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2782 res.attr_bitmask[2] = 0;
2783 break;
2784 case 1:
2785 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2786 break;
2787 case 2:
2788 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2789 }
1da177e4 2790 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2791 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2792 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2793 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2794 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2795 NFS_CAP_CTIME|NFS_CAP_MTIME|
2796 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2797 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2798 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2799 server->caps |= NFS_CAP_ACLS;
2800 if (res.has_links != 0)
2801 server->caps |= NFS_CAP_HARDLINKS;
2802 if (res.has_symlinks != 0)
2803 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2804 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2805 server->caps |= NFS_CAP_FILEID;
2806 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2807 server->caps |= NFS_CAP_MODE;
2808 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2809 server->caps |= NFS_CAP_NLINK;
2810 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2811 server->caps |= NFS_CAP_OWNER;
2812 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2813 server->caps |= NFS_CAP_OWNER_GROUP;
2814 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2815 server->caps |= NFS_CAP_ATIME;
2816 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2817 server->caps |= NFS_CAP_CTIME;
2818 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2819 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2820#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2821 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2822 server->caps |= NFS_CAP_SECURITY_LABEL;
2823#endif
2824 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2825 sizeof(server->attr_bitmask));
b944dba3 2826 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2827
a65318bf
TM		 2828 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2829 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2830 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2831 server->cache_consistency_bitmask[2] = 0;
1da177e4 2832 server->acl_bitmask = res.acl_bitmask;
264e6351 2833 server->fh_expire_type = res.fh_expire_type;
1da177e4 2834 }
cccef3b9 2835
1da177e4
LT		 2836 return status;
2837}
2838
55a97593 2839int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2840{
2841 struct nfs4_exception exception = { };
2842 int err;
2843 do {
2844 err = nfs4_handle_exception(server,
2845 _nfs4_server_capabilities(server, fhandle),
2846 &exception);
2847 } while (exception.retry);
2848 return err;
2849}
2850
2851static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2852 struct nfs_fsinfo *info)
2853{
aa9c2669 2854 u32 bitmask[3];
1da177e4 2855 struct nfs4_lookup_root_arg args = {
aa9c2669 2856 .bitmask = bitmask,
1da177e4
LT		 2857 };
2858 struct nfs4_lookup_res res = {
2859 .server = server,
0e574af1 2860 .fattr = info->fattr,
1da177e4
LT		 2861 .fh = fhandle,
2862 };
2863 struct rpc_message msg = {
2864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2865 .rpc_argp = &args,
2866 .rpc_resp = &res,
2867 };
008f55d0 2868
aa9c2669
DQ		 2869 bitmask[0] = nfs4_fattr_bitmap[0];
2870 bitmask[1] = nfs4_fattr_bitmap[1];
2871 /*
2872 * Process the label in the upcoming getfattr
2873 */
2874 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2875
0e574af1 2876 nfs_fattr_init(info->fattr);
7c513058 2877 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2878}
2879
2880static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2881 struct nfs_fsinfo *info)
2882{
2883 struct nfs4_exception exception = { };
2884 int err;
2885 do {
fb8a5ba8 2886 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2887 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2888 switch (err) {
2889 case 0:
2890 case -NFS4ERR_WRONGSEC:
05e9cfb4 2891 goto out;
fb8a5ba8
BS		 2892 default:
2893 err = nfs4_handle_exception(server, err, &exception);
2894 }
1da177e4 2895 } while (exception.retry);
05e9cfb4 2896out:
1da177e4
LT		 2897 return err;
2898}
2899
8f70e95f
BS		 2900static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2901 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2902{
c2190661
TM		 2903 struct rpc_auth_create_args auth_args = {
2904 .pseudoflavor = flavor,
2905 };
8f70e95f
BS		 2906 struct rpc_auth *auth;
2907 int ret;
2908
c2190661 2909 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2910 if (IS_ERR(auth)) {
75bc8821 2911 ret = -EACCES;
8f70e95f
BS		 2912 goto out;
2913 }
2914 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2915out:
2916 return ret;
2917}
2918
9a744ba3
CL		 2919/*
2920 * Retry pseudoroot lookup with various security flavors. We do this when:
2921 *
2922 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2923 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2924 *
2925 * Returns zero on success, or a negative NFS4ERR value, or a
2926 * negative errno value.
2927 */
801a16dc 2928static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2929 struct nfs_fsinfo *info)
1da177e4 2930{
9a744ba3
CL		 2931 /* Per 3530bis 15.33.5 */
2932 static const rpc_authflavor_t flav_array[] = {
2933 RPC_AUTH_GSS_KRB5P,
2934 RPC_AUTH_GSS_KRB5I,
2935 RPC_AUTH_GSS_KRB5,
c4eafe11 2936 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2937 RPC_AUTH_NULL,
2938 };
2939 int status = -EPERM;
2940 size_t i;
6a1a1e34 2941
4d4b69dd
WAA		 2942 if (server->auth_info.flavor_len > 0) {
2943 /* try each flavor specified by user */
2944 for (i = 0; i < server->auth_info.flavor_len; i++) {
2945 status = nfs4_lookup_root_sec(server, fhandle, info,
2946 server->auth_info.flavors[i]);
2947 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2948 continue;
2949 break;
2950 }
2951 } else {
2952 /* no flavors specified by user, try default list */
2953 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2954 status = nfs4_lookup_root_sec(server, fhandle, info,
2955 flav_array[i]);
2956 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2957 continue;
2958 break;
2959 }
8f70e95f 2960 }
9a744ba3 2961
fb8a5ba8
BS		 2962 /*
2963 * -EACCESS could mean that the user doesn't have correct permissions
2964 * to access the mount. It could also mean that we tried to mount
2965 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2966 * existing mount programs don't handle -EACCES very well so it should
2967 * be mapped to -EPERM instead.
2968 */
2969 if (status == -EACCES)
2970 status = -EPERM;
801a16dc
BS		 2971 return status;
2972}
2973
2ed4b95b
CL		 2974static int nfs4_do_find_root_sec(struct nfs_server *server,
2975 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2976{
2977 int mv = server->nfs_client->cl_minorversion;
2978 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2979}
2980
2981/**
2982 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2983 * @server: initialized nfs_server handle
2984 * @fhandle: we fill in the pseudo-fs root file handle
2985 * @info: we fill in an FSINFO struct
5e6b1990 2986 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2987 *
2988 * Returns zero on success, or a negative errno.
801a16dc 2989 */
3028eb2b 2990int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2991 struct nfs_fsinfo *info,
2992 bool auth_probe)
801a16dc 2993{
2ed4b95b
CL		 2994 int status;
2995
5e6b1990
TM		 2996 switch (auth_probe) {
2997 case false:
2998 status = nfs4_lookup_root(server, fhandle, info);
2999 if (status != -NFS4ERR_WRONGSEC)
3000 break;
5e6b1990 3001 default:
2ed4b95b 3002 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3003 }
2ed4b95b 3004
1da177e4
LT		 3005 if (status == 0)
3006 status = nfs4_server_capabilities(server, fhandle);
3007 if (status == 0)
3008 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3009
c12e87f4 3010 return nfs4_map_errors(status);
1da177e4
LT		 3011}
3012
bae36241
BS		 3013static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3014 struct nfs_fsinfo *info)
3015{
3016 int error;
3017 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3018 struct nfs4_label *label = NULL;
bae36241
BS		 3019
3020 error = nfs4_server_capabilities(server, mntfh);
3021 if (error < 0) {
3022 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3023 return error;
3024 }
3025
14c43f76
DQ		 3026 label = nfs4_label_alloc(server, GFP_KERNEL);
3027 if (IS_ERR(label))
3028 return PTR_ERR(label);
3029
1775fd3e 3030 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3031 if (error < 0) {
3032 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3033 goto err_free_label;
bae36241
BS		 3034 }
3035
3036 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3037 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3038 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3039
14c43f76
DQ		 3040err_free_label:
3041 nfs4_label_free(label);
3042
bae36241
BS		 3043 return error;
3044}
3045
6b97fd3d
MN		 3046/*
3047 * Get locations and (maybe) other attributes of a referral.
3048 * Note that we'll actually follow the referral later when
3049 * we detect fsid mismatch in inode revalidation
3050 */
f05d147f
BS		 3051static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3052 const struct qstr *name, struct nfs_fattr *fattr,
3053 struct nfs_fh *fhandle)
6b97fd3d
MN		 3054{
3055 int status = -ENOMEM;
3056 struct page *page = NULL;
3057 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3058
3059 page = alloc_page(GFP_KERNEL);
3060 if (page == NULL)
3061 goto out;
3062 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3063 if (locations == NULL)
3064 goto out;
3065
f05d147f 3066 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3067 if (status != 0)
3068 goto out;
519ae255
CL		 3069
3070 /*
3071 * If the fsid didn't change, this is a migration event, not a
3072 * referral. Cause us to drop into the exception handler, which
3073 * will kick off migration recovery.
3074 */
6b97fd3d 3075 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3076 dprintk("%s: server did not return a different fsid for"
3077 " a referral at %s\n", __func__, name->name);
519ae255 3078 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3079 goto out;
3080 }
533eb461
AA		 3081 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3082 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3083
533eb461 3084 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3085 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3086 memset(fhandle, 0, sizeof(struct nfs_fh));
3087out:
3088 if (page)
3089 __free_page(page);
5d7ca35a 3090 kfree(locations);
6b97fd3d
MN		 3091 return status;
3092}
3093
1775fd3e
DQ		 3094static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3095 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3096{
3097 struct nfs4_getattr_arg args = {
3098 .fh = fhandle,
3099 .bitmask = server->attr_bitmask,
3100 };
3101 struct nfs4_getattr_res res = {
3102 .fattr = fattr,
1775fd3e 3103 .label = label,
1da177e4
LT		 3104 .server = server,
3105 };
3106 struct rpc_message msg = {
3107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3108 .rpc_argp = &args,
3109 .rpc_resp = &res,
3110 };
aa9c2669
DQ		 3111
3112 args.bitmask = nfs4_bitmask(server, label);
3113
0e574af1 3114 nfs_fattr_init(fattr);
7c513058 3115 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3116}
3117
1775fd3e
DQ		 3118static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3119 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3120{
3121 struct nfs4_exception exception = { };
3122 int err;
3123 do {
b5f875a9
TM		 3124 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3125 trace_nfs4_getattr(server, fhandle, fattr, err);
3126 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3127 &exception);
3128 } while (exception.retry);
3129 return err;
3130}
3131
3132/*
3133 * The file is not closed if it is opened due to the a request to change
3134 * the size of the file. The open call will not be needed once the
3135 * VFS layer lookup-intents are implemented.
3136 *
3137 * Close is called when the inode is destroyed.
3138 * If we haven't opened the file for O_WRONLY, we
3139 * need to in the size_change case to obtain a stateid.
3140 *
3141 * Got race?
3142 * Because OPEN is always done by name in nfsv4, it is
3143 * possible that we opened a different file by the same
3144 * name. We can recognize this race condition, but we
3145 * can't do anything about it besides returning an error.
3146 *
3147 * This will be fixed with VFS changes (lookup-intent).
3148 */
3149static int
3150nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3151 struct iattr *sattr)
3152{
08e9eac4 3153 struct inode *inode = dentry->d_inode;
659bfcd6 3154 struct rpc_cred *cred = NULL;
d530838b 3155 struct nfs4_state *state = NULL;
14c43f76 3156 struct nfs4_label *label = NULL;
1da177e4
LT		 3157 int status;
3158
8a1636c4 3159 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3160 pnfs_commit_and_return_layout(inode);
8a1636c4 3161
0e574af1 3162 nfs_fattr_init(fattr);
1da177e4 3163
2669940d
AA		 3164 /* Deal with open(O_TRUNC) */
3165 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3166 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3167
3168 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3169 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3170 return 0;
3171
d530838b 3172 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3173 if (sattr->ia_valid & ATTR_FILE) {
3174 struct nfs_open_context *ctx;
3175
3176 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3177 if (ctx) {
3178 cred = ctx->cred;
3179 state = ctx->state;
3180 }
659bfcd6 3181 }
08e9eac4 3182
14c43f76
DQ		 3183 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3184 if (IS_ERR(label))
3185 return PTR_ERR(label);
3186
3187 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3188 if (status == 0) {
65e4308d 3189 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3190 nfs_setsecurity(inode, fattr, label);
3191 }
14c43f76 3192 nfs4_label_free(label);
1da177e4
LT		 3193 return status;
3194}
3195
0c2e53f1
TM		 3196static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3197 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3198 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3199{
0c2e53f1 3200 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3201 int status;
3202 struct nfs4_lookup_arg args = {
3203 .bitmask = server->attr_bitmask,
0c2e53f1 3204 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3205 .name = name,
3206 };
3207 struct nfs4_lookup_res res = {
3208 .server = server,
3209 .fattr = fattr,
aa9c2669 3210 .label = label,
2b3de441
DH		 3211 .fh = fhandle,
3212 };
3213 struct rpc_message msg = {
3214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3215 .rpc_argp = &args,
3216 .rpc_resp = &res,
3217 };
3218
aa9c2669
DQ		 3219 args.bitmask = nfs4_bitmask(server, label);
3220
2b3de441
DH		 3221 nfs_fattr_init(fattr);
3222
1da177e4 3223 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3224 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3225 dprintk("NFS reply lookup: %d\n", status);
3226 return status;
3227}
3228
72de53ec 3229static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3230{
7ebb9315 3231 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3232 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3233 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3234 fattr->nlink = 2;
3235}
3236
72de53ec
BS		 3237static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3238 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3239 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3240{
3241 struct nfs4_exception exception = { };
72de53ec 3242 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3243 int err;
3244 do {
1775fd3e 3245 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3246 trace_nfs4_lookup(dir, name, err);
72de53ec 3247 switch (err) {
08ef7bd3 3248 case -NFS4ERR_BADNAME:
72de53ec
BS		 3249 err = -ENOENT;
3250 goto out;
0c2e53f1 3251 case -NFS4ERR_MOVED:
f05d147f 3252 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3253 goto out;
0c2e53f1 3254 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3255 err = -EPERM;
3256 if (client != *clnt)
3257 goto out;
66b06860 3258 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3259 if (IS_ERR(client))
3260 return PTR_ERR(client);
3261
3262 exception.retry = 1;
3263 break;
3264 default:
3265 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3266 }
1da177e4 3267 } while (exception.retry);
72de53ec
BS		 3268
3269out:
3270 if (err == 0)
3271 *clnt = client;
3272 else if (client != *clnt)
3273 rpc_shutdown_client(client);
3274
1da177e4
LT		 3275 return err;
3276}
3277
80a16b21 3278static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3279 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3280 struct nfs4_label *label)
72de53ec
BS		 3281{
3282 int status;
3283 struct rpc_clnt *client = NFS_CLIENT(dir);
3284
1775fd3e 3285 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3286 if (client != NFS_CLIENT(dir)) {
3287 rpc_shutdown_client(client);
3288 nfs_fixup_secinfo_attributes(fattr);
3289 }
3290 return status;
3291}
3292
f05d147f
BS		 3293struct rpc_clnt *
3294nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3295 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3296{
b72888cb 3297 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3298 int status;
f05d147f 3299
1775fd3e 3300 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3301 if (status < 0)
f05d147f 3302 return ERR_PTR(status);
b72888cb 3303 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3304}
3305
1da177e4
LT		 3306static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3307{
76b32999 3308 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3309 struct nfs4_accessargs args = {
3310 .fh = NFS_FH(inode),
a4980e78 3311 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3312 };
3313 struct nfs4_accessres res = {
3314 .server = server,
1da177e4 3315 };
1da177e4
LT		 3316 struct rpc_message msg = {
3317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3318 .rpc_argp = &args,
3319 .rpc_resp = &res,
3320 .rpc_cred = entry->cred,
3321 };
3322 int mode = entry->mask;
aa9c2669 3323 int status = 0;
1da177e4
LT		 3324
3325 /*
3326 * Determine which access bits we want to ask for...
3327 */
3328 if (mode & MAY_READ)
3329 args.access |= NFS4_ACCESS_READ;
3330 if (S_ISDIR(inode->i_mode)) {
3331 if (mode & MAY_WRITE)
3332 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3333 if (mode & MAY_EXEC)
3334 args.access |= NFS4_ACCESS_LOOKUP;
3335 } else {
3336 if (mode & MAY_WRITE)
3337 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3338 if (mode & MAY_EXEC)
3339 args.access |= NFS4_ACCESS_EXECUTE;
3340 }
c407d41a
TM		 3341
3342 res.fattr = nfs_alloc_fattr();
3343 if (res.fattr == NULL)
3344 return -ENOMEM;
3345
7c513058 3346 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3347 if (!status) {
6168f62c 3348 nfs_access_set_mask(entry, res.access);
c407d41a 3349 nfs_refresh_inode(inode, res.fattr);
1da177e4 3350 }
c407d41a 3351 nfs_free_fattr(res.fattr);
1da177e4
LT		 3352 return status;
3353}
3354
3355static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3356{
3357 struct nfs4_exception exception = { };
3358 int err;
3359 do {
c1578b76
TM		 3360 err = _nfs4_proc_access(inode, entry);
3361 trace_nfs4_access(inode, err);
3362 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3363 &exception);
3364 } while (exception.retry);
3365 return err;
3366}
3367
3368/*
3369 * TODO: For the time being, we don't try to get any attributes
3370 * along with any of the zero-copy operations READ, READDIR,
3371 * READLINK, WRITE.
3372 *
3373 * In the case of the first three, we want to put the GETATTR
3374 * after the read-type operation -- this is because it is hard
3375 * to predict the length of a GETATTR response in v4, and thus
3376 * align the READ data correctly. This means that the GETATTR
3377 * may end up partially falling into the page cache, and we should
3378 * shift it into the 'tail' of the xdr_buf before processing.
3379 * To do this efficiently, we need to know the total length
3380 * of data received, which doesn't seem to be available outside
3381 * of the RPC layer.
3382 *
3383 * In the case of WRITE, we also want to put the GETATTR after
3384 * the operation -- in this case because we want to make sure
140150db 3385 * we get the post-operation mtime and size.
1da177e4
LT		 3386 *
3387 * Both of these changes to the XDR layer would in fact be quite
3388 * minor, but I decided to leave them for a subsequent patch.
3389 */
3390static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3391 unsigned int pgbase, unsigned int pglen)
3392{
3393 struct nfs4_readlink args = {
3394 .fh = NFS_FH(inode),
3395 .pgbase = pgbase,
3396 .pglen = pglen,
3397 .pages = &page,
3398 };
f50c7000 3399 struct nfs4_readlink_res res;
1da177e4
LT		 3400 struct rpc_message msg = {
3401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3402 .rpc_argp = &args,
f50c7000 3403 .rpc_resp = &res,
1da177e4
LT		 3404 };
3405
7c513058 3406 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3407}
3408
3409static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3410 unsigned int pgbase, unsigned int pglen)
3411{
3412 struct nfs4_exception exception = { };
3413 int err;
3414 do {
c1578b76
TM		 3415 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3416 trace_nfs4_readlink(inode, err);
3417 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3418 &exception);
3419 } while (exception.retry);
3420 return err;
3421}
3422
1da177e4 3423/*
8867fe58 3424 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3425 */
1da177e4
LT		 3426static int
3427nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3428 int flags)
1da177e4 3429{
aa9c2669 3430 struct nfs4_label l, *ilabel = NULL;
8867fe58 3431 struct nfs_open_context *ctx;
1da177e4 3432 struct nfs4_state *state;
5bc2afc2 3433 int opened = 0;
1da177e4
LT		 3434 int status = 0;
3435
8867fe58
MS		 3436 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3437 if (IS_ERR(ctx))
3438 return PTR_ERR(ctx);
3439
aa9c2669
DQ		 3440 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3441
a8a5da99 3442 sattr->ia_mode &= ~current_umask();
5bc2afc2 3443 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3444 if (IS_ERR(state)) {
3445 status = PTR_ERR(state);
c0204fd2 3446 goto out;
1da177e4 3447 }
1da177e4 3448out:
aa9c2669 3449 nfs4_label_release_security(ilabel);
8867fe58 3450 put_nfs_open_context(ctx);
1da177e4
LT		 3451 return status;
3452}
3453
3454static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3455{
16e42959 3456 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3457 struct nfs_removeargs args = {
1da177e4 3458 .fh = NFS_FH(dir),
26fe5750 3459 .name = *name,
16e42959 3460 };
4fdc17b2 3461 struct nfs_removeres res = {
16e42959 3462 .server = server,
1da177e4 3463 };
1da177e4 3464 struct rpc_message msg = {
4fdc17b2
TM		 3465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3466 .rpc_argp = &args,
3467 .rpc_resp = &res,
1da177e4 3468 };
778d2817 3469 int status;
1da177e4 3470
7c513058 3471 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3472 if (status == 0)
16e42959 3473 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3474 return status;
3475}
3476
3477static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
3481 do {
078ea3df
TM		 3482 err = _nfs4_proc_remove(dir, name);
3483 trace_nfs4_remove(dir, name, err);
3484 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
e4eff1a6 3490static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3491{
e4eff1a6
TM		 3492 struct nfs_server *server = NFS_SERVER(dir);
3493 struct nfs_removeargs *args = msg->rpc_argp;
3494 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3495
e4eff1a6 3496 res->server = server;
1da177e4 3497 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3498 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3499
3500 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3501}
3502
34e137cc
BS		 3503static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3504{
d9afbd1b
TM		 3505 nfs4_setup_sequence(NFS_SERVER(data->dir),
3506 &data->args.seq_args,
3507 &data->res.seq_res,
3508 task);
1da177e4
LT		 3509}
3510
e4eff1a6 3511static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3512{
078ea3df
TM		 3513 struct nfs_unlinkdata *data = task->tk_calldata;
3514 struct nfs_removeres *res = &data->res;
e4eff1a6 3515
14516c3a
TM		 3516 if (!nfs4_sequence_done(task, &res->seq_res))
3517 return 0;
9e33bed5 3518 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3519 return 0;
3520 update_changeattr(dir, &res->cinfo);
e4eff1a6 3521 return 1;
1da177e4
LT		 3522}
3523
d3d4152a
JL		 3524static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3525{
3526 struct nfs_server *server = NFS_SERVER(dir);
3527 struct nfs_renameargs *arg = msg->rpc_argp;
3528 struct nfs_renameres *res = msg->rpc_resp;
3529
3530 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3531 res->server = server;
a9c92d6b 3532 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3533}
3534
c6bfa1a1
BS		 3535static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3536{
d9afbd1b
TM		 3537 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3538 &data->args.seq_args,
3539 &data->res.seq_res,
3540 task);
d3d4152a
JL		 3541}
3542
3543static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3544 struct inode *new_dir)
3545{
fbc6f7c2
TM		 3546 struct nfs_renamedata *data = task->tk_calldata;
3547 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3548
3549 if (!nfs4_sequence_done(task, &res->seq_res))
3550 return 0;
3551 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3552 return 0;
3553
3554 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3555 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3556 return 1;
3557}
3558
1da177e4
LT		 3559static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3560{
91ba2eee 3561 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3562 struct nfs4_link_arg arg = {
3563 .fh = NFS_FH(inode),
3564 .dir_fh = NFS_FH(dir),
3565 .name = name,
91ba2eee
TM		 3566 .bitmask = server->attr_bitmask,
3567 };
91ba2eee
TM		 3568 struct nfs4_link_res res = {
3569 .server = server,
1775fd3e 3570 .label = NULL,
1da177e4 3571 };
1da177e4
LT		 3572 struct rpc_message msg = {
3573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3574 .rpc_argp = &arg,
91ba2eee 3575 .rpc_resp = &res,
1da177e4 3576 };
136f2627
TM		 3577 int status = -ENOMEM;
3578
3579 res.fattr = nfs_alloc_fattr();
778d2817 3580 if (res.fattr == NULL)
136f2627 3581 goto out;
1da177e4 3582
14c43f76
DQ		 3583 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3584 if (IS_ERR(res.label)) {
3585 status = PTR_ERR(res.label);
3586 goto out;
3587 }
aa9c2669 3588 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3589
7c513058 3590 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3591 if (!status) {
3592 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3593 status = nfs_post_op_update_inode(inode, res.fattr);
3594 if (!status)
3595 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3596 }
14c43f76
DQ		 3597
3598
3599 nfs4_label_free(res.label);
3600
136f2627 3601out:
136f2627 3602 nfs_free_fattr(res.fattr);
1da177e4
LT		 3603 return status;
3604}
3605
3606static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3607{
3608 struct nfs4_exception exception = { };
3609 int err;
3610 do {
3611 err = nfs4_handle_exception(NFS_SERVER(inode),
3612 _nfs4_proc_link(inode, dir, name),
3613 &exception);
3614 } while (exception.retry);
3615 return err;
3616}
3617
57dc9a57
TM		 3618struct nfs4_createdata {
3619 struct rpc_message msg;
3620 struct nfs4_create_arg arg;
3621 struct nfs4_create_res res;
3622 struct nfs_fh fh;
3623 struct nfs_fattr fattr;
1775fd3e 3624 struct nfs4_label *label;
57dc9a57
TM		 3625};
3626
3627static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3628 struct qstr *name, struct iattr *sattr, u32 ftype)
3629{
3630 struct nfs4_createdata *data;
3631
3632 data = kzalloc(sizeof(*data), GFP_KERNEL);
3633 if (data != NULL) {
3634 struct nfs_server *server = NFS_SERVER(dir);
3635
14c43f76
DQ		 3636 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3637 if (IS_ERR(data->label))
3638 goto out_free;
3639
57dc9a57
TM		 3640 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3641 data->msg.rpc_argp = &data->arg;
3642 data->msg.rpc_resp = &data->res;
3643 data->arg.dir_fh = NFS_FH(dir);
3644 data->arg.server = server;
3645 data->arg.name = name;
3646 data->arg.attrs = sattr;
3647 data->arg.ftype = ftype;
aa9c2669 3648 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3649 data->res.server = server;
3650 data->res.fh = &data->fh;
3651 data->res.fattr = &data->fattr;
1775fd3e 3652 data->res.label = data->label;
57dc9a57 3653 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3654 }
3655 return data;
14c43f76
DQ		 3656out_free:
3657 kfree(data);
3658 return NULL;
57dc9a57
TM		 3659}
3660
3661static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3662{
7c513058 3663 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3664 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3665 if (status == 0) {
3666 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3667 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3668 }
3669 return status;
3670}
3671
3672static void nfs4_free_createdata(struct nfs4_createdata *data)
3673{
14c43f76 3674 nfs4_label_free(data->label);
57dc9a57
TM		 3675 kfree(data);
3676}
3677
4f390c15 3678static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3679 struct page *page, unsigned int len, struct iattr *sattr,
3680 struct nfs4_label *label)
1da177e4 3681{
57dc9a57
TM		 3682 struct nfs4_createdata *data;
3683 int status = -ENAMETOOLONG;
1da177e4 3684
94a6d753 3685 if (len > NFS4_MAXPATHLEN)
57dc9a57 3686 goto out;
4f390c15 3687
57dc9a57
TM		 3688 status = -ENOMEM;
3689 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3690 if (data == NULL)
3691 goto out;
3692
3693 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3694 data->arg.u.symlink.pages = &page;
3695 data->arg.u.symlink.len = len;
1775fd3e 3696 data->arg.label = label;
1da177e4 3697
57dc9a57
TM		 3698 status = nfs4_do_create(dir, dentry, data);
3699
3700 nfs4_free_createdata(data);
3701out:
1da177e4
LT		 3702 return status;
3703}
3704
4f390c15 3705static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3706 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3707{
3708 struct nfs4_exception exception = { };
aa9c2669 3709 struct nfs4_label l, *label = NULL;
1da177e4 3710 int err;
aa9c2669
DQ		 3711
3712 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3713
1da177e4 3714 do {
078ea3df
TM		 3715 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3716 trace_nfs4_symlink(dir, &dentry->d_name, err);
3717 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3718 &exception);
3719 } while (exception.retry);
aa9c2669
DQ		 3720
3721 nfs4_label_release_security(label);
1da177e4
LT		 3722 return err;
3723}
3724
3725static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3726 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3727{
57dc9a57
TM		 3728 struct nfs4_createdata *data;
3729 int status = -ENOMEM;
1da177e4 3730
57dc9a57
TM		 3731 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3732 if (data == NULL)
3733 goto out;
3734
1775fd3e 3735 data->arg.label = label;
57dc9a57
TM		 3736 status = nfs4_do_create(dir, dentry, data);
3737
3738 nfs4_free_createdata(data);
3739out:
1da177e4
LT		 3740 return status;
3741}
3742
3743static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3744 struct iattr *sattr)
3745{
3746 struct nfs4_exception exception = { };
aa9c2669 3747 struct nfs4_label l, *label = NULL;
1da177e4 3748 int err;
a8a5da99 3749
aa9c2669
DQ		 3750 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3751
a8a5da99 3752 sattr->ia_mode &= ~current_umask();
1da177e4 3753 do {
078ea3df
TM		 3754 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3755 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3756 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3757 &exception);
3758 } while (exception.retry);
aa9c2669
DQ		 3759 nfs4_label_release_security(label);
3760
1da177e4
LT		 3761 return err;
3762}
3763
3764static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3765 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3766{
3767 struct inode *dir = dentry->d_inode;
3768 struct nfs4_readdir_arg args = {
3769 .fh = NFS_FH(dir),
56e4ebf8 3770 .pages = pages,
1da177e4
LT		 3771 .pgbase = 0,
3772 .count = count,
96d25e53 3773 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3774 .plus = plus,
1da177e4
LT		 3775 };
3776 struct nfs4_readdir_res res;
3777 struct rpc_message msg = {
3778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3779 .rpc_argp = &args,
3780 .rpc_resp = &res,
3781 .rpc_cred = cred,
3782 };
3783 int status;
3784
6de1472f
AV		 3785 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3786 dentry,
eadf4598 3787 (unsigned long long)cookie);
c3f52af3 3788 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3789 res.pgbase = args.pgbase;
7c513058 3790 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3791 if (status >= 0) {
c3f52af3 3792 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3793 status += args.pgbase;
3794 }
c4812998
TM		 3795
3796 nfs_invalidate_atime(dir);
3797
3110ff80 3798 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3799 return status;
3800}
3801
3802static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3803 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3804{
3805 struct nfs4_exception exception = { };
3806 int err;
3807 do {
c1578b76
TM		 3808 err = _nfs4_proc_readdir(dentry, cred, cookie,
3809 pages, count, plus);
3810 trace_nfs4_readdir(dentry->d_inode, err);
3811 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3812 &exception);
3813 } while (exception.retry);
3814 return err;
3815}
3816
3817static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3818 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3819{
57dc9a57
TM		 3820 struct nfs4_createdata *data;
3821 int mode = sattr->ia_mode;
3822 int status = -ENOMEM;
1da177e4 3823
57dc9a57
TM		 3824 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3825 if (data == NULL)
3826 goto out;
3827
1da177e4 3828 if (S_ISFIFO(mode))
57dc9a57 3829 data->arg.ftype = NF4FIFO;
1da177e4 3830 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3831 data->arg.ftype = NF4BLK;
3832 data->arg.u.device.specdata1 = MAJOR(rdev);
3833 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3834 }
3835 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3836 data->arg.ftype = NF4CHR;
3837 data->arg.u.device.specdata1 = MAJOR(rdev);
3838 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3839 } else if (!S_ISSOCK(mode)) {
3840 status = -EINVAL;
3841 goto out_free;
1da177e4 3842 }
1775fd3e 3843
aa9c2669 3844 data->arg.label = label;
57dc9a57 3845 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3846out_free:
57dc9a57
TM		 3847 nfs4_free_createdata(data);
3848out:
1da177e4
LT		 3849 return status;
3850}
3851
3852static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3853 struct iattr *sattr, dev_t rdev)
3854{
3855 struct nfs4_exception exception = { };
aa9c2669 3856 struct nfs4_label l, *label = NULL;
1da177e4 3857 int err;
a8a5da99 3858
aa9c2669
DQ		 3859 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3860
a8a5da99 3861 sattr->ia_mode &= ~current_umask();
1da177e4 3862 do {
078ea3df
TM		 3863 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3864 trace_nfs4_mknod(dir, &dentry->d_name, err);
3865 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3866 &exception);
3867 } while (exception.retry);
aa9c2669
DQ		 3868
3869 nfs4_label_release_security(label);
3870
1da177e4
LT		 3871 return err;
3872}
3873
3874static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3875 struct nfs_fsstat *fsstat)
3876{
3877 struct nfs4_statfs_arg args = {
3878 .fh = fhandle,
3879 .bitmask = server->attr_bitmask,
3880 };
24ad148a
BH		 3881 struct nfs4_statfs_res res = {
3882 .fsstat = fsstat,
3883 };
1da177e4
LT		 3884 struct rpc_message msg = {
3885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3886 .rpc_argp = &args,
24ad148a 3887 .rpc_resp = &res,
1da177e4
LT		 3888 };
3889
0e574af1 3890 nfs_fattr_init(fsstat->fattr);
7c513058 3891 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3892}
3893
3894static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3895{
3896 struct nfs4_exception exception = { };
3897 int err;
3898 do {
3899 err = nfs4_handle_exception(server,
3900 _nfs4_proc_statfs(server, fhandle, fsstat),
3901 &exception);
3902 } while (exception.retry);
3903 return err;
3904}
3905
3906static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3907 struct nfs_fsinfo *fsinfo)
3908{
3909 struct nfs4_fsinfo_arg args = {
3910 .fh = fhandle,
3911 .bitmask = server->attr_bitmask,
3912 };
3dda5e43
BH		 3913 struct nfs4_fsinfo_res res = {
3914 .fsinfo = fsinfo,
3915 };
1da177e4
LT		 3916 struct rpc_message msg = {
3917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3918 .rpc_argp = &args,
3dda5e43 3919 .rpc_resp = &res,
1da177e4
LT		 3920 };
3921
7c513058 3922 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3923}
3924
3925static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3926{
3927 struct nfs4_exception exception = { };
83ca7f5a 3928 unsigned long now = jiffies;
1da177e4
LT		 3929 int err;
3930
3931 do {
83ca7f5a 3932 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3933 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3934 if (err == 0) {
3935 struct nfs_client *clp = server->nfs_client;
3936
3937 spin_lock(&clp->cl_lock);
3938 clp->cl_lease_time = fsinfo->lease_time * HZ;
3939 clp->cl_last_renewal = now;
3940 spin_unlock(&clp->cl_lock);
3941 break;
3942 }
3943 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3944 } while (exception.retry);
3945 return err;
3946}
3947
3948static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3949{
e38eb650
BS		 3950 int error;
3951
0e574af1 3952 nfs_fattr_init(fsinfo->fattr);
e38eb650 3953 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3954 if (error == 0) {
3955 /* block layout checks this! */
3956 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3957 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3958 }
e38eb650
BS		 3959
3960 return error;
1da177e4
LT		 3961}
3962
3963static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3964 struct nfs_pathconf *pathconf)
3965{
3966 struct nfs4_pathconf_arg args = {
3967 .fh = fhandle,
3968 .bitmask = server->attr_bitmask,
3969 };
d45b2989
BH		 3970 struct nfs4_pathconf_res res = {
3971 .pathconf = pathconf,
3972 };
1da177e4
LT		 3973 struct rpc_message msg = {
3974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3975 .rpc_argp = &args,
d45b2989 3976 .rpc_resp = &res,
1da177e4
LT		 3977 };
3978
3979 /* None of the pathconf attributes are mandatory to implement */
3980 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3981 memset(pathconf, 0, sizeof(*pathconf));
3982 return 0;
3983 }
3984
0e574af1 3985 nfs_fattr_init(pathconf->fattr);
7c513058 3986 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3987}
3988
3989static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3990 struct nfs_pathconf *pathconf)
3991{
3992 struct nfs4_exception exception = { };
3993 int err;
3994
3995 do {
3996 err = nfs4_handle_exception(server,
3997 _nfs4_proc_pathconf(server, fhandle, pathconf),
3998 &exception);
3999 } while (exception.retry);
4000 return err;
4001}
4002
5521abfd 4003int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4004 const struct nfs_open_context *ctx,
4005 const struct nfs_lock_context *l_ctx,
4006 fmode_t fmode)
4007{
4008 const struct nfs_lockowner *lockowner = NULL;
4009
4010 if (l_ctx != NULL)
4011 lockowner = &l_ctx->lockowner;
5521abfd 4012 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4013}
4014EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4015
5521abfd
TM		 4016static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4017 const struct nfs_open_context *ctx,
4018 const struct nfs_lock_context *l_ctx,
4019 fmode_t fmode)
4020{
4021 nfs4_stateid current_stateid;
4022
e1253be0
TM		 4023 /* If the current stateid represents a lost lock, then exit */
4024 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4025 return true;
5521abfd
TM		 4026 return nfs4_stateid_match(stateid, &current_stateid);
4027}
4028
4029static bool nfs4_error_stateid_expired(int err)
4030{
4031 switch (err) {
4032 case -NFS4ERR_DELEG_REVOKED:
4033 case -NFS4ERR_ADMIN_REVOKED:
4034 case -NFS4ERR_BAD_STATEID:
4035 case -NFS4ERR_STALE_STATEID:
4036 case -NFS4ERR_OLD_STATEID:
4037 case -NFS4ERR_OPENMODE:
4038 case -NFS4ERR_EXPIRED:
4039 return true;
4040 }
4041 return false;
4042}
4043
d45f60c6 4044void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4045{
d45f60c6 4046 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4047}
4048
d45f60c6 4049static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4050{
d45f60c6 4051 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4052
d45f60c6
WAA		 4053 trace_nfs4_read(hdr, task->tk_status);
4054 if (nfs4_async_handle_error(task, server,
4055 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4056 rpc_restart_call_prepare(task);
ec06c096 4057 return -EAGAIN;
1da177e4 4058 }
8850df99 4059
d45f60c6 4060 __nfs4_read_done_cb(hdr);
1da177e4 4061 if (task->tk_status > 0)
d45f60c6 4062 renew_lease(server, hdr->timestamp);
ec06c096 4063 return 0;
1da177e4
LT		 4064}
4065
5521abfd 4066static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4067 struct nfs_pgio_args *args)
5521abfd
TM		 4068{
4069
4070 if (!nfs4_error_stateid_expired(task->tk_status) ||
4071 nfs4_stateid_is_current(&args->stateid,
4072 args->context,
4073 args->lock_context,
4074 FMODE_READ))
4075 return false;
4076 rpc_restart_call_prepare(task);
4077 return true;
4078}
4079
d45f60c6 4080static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4081{
4082
4083 dprintk("--> %s\n", __func__);
4084
d45f60c6 4085 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4086 return -EAGAIN;
d45f60c6 4087 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4088 return -EAGAIN;
d45f60c6
WAA		 4089 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4090 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4091}
4092
d45f60c6
WAA		 4093static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4094 struct rpc_message *msg)
1da177e4 4095{
d45f60c6
WAA		 4096 hdr->timestamp = jiffies;
4097 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4098 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4099 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4100}
4101
d45f60c6
WAA		 4102static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4103 struct nfs_pgio_header *hdr)
ea7c3303 4104{
d45f60c6
WAA		 4105 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4106 &hdr->args.seq_args,
4107 &hdr->res.seq_res,
9b206149 4108 task))
ef1820f9 4109 return 0;
d45f60c6
WAA		 4110 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4111 hdr->args.lock_context,
4112 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4113 return -EIO;
d45f60c6 4114 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4115 return -EIO;
4116 return 0;
1da177e4
LT		 4117}
4118
d45f60c6
WAA		 4119static int nfs4_write_done_cb(struct rpc_task *task,
4120 struct nfs_pgio_header *hdr)
1da177e4 4121{
d45f60c6 4122 struct inode *inode = hdr->inode;
1da177e4 4123
d45f60c6
WAA		 4124 trace_nfs4_write(hdr, task->tk_status);
4125 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4126 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4127 rpc_restart_call_prepare(task);
788e7a89 4128 return -EAGAIN;
1da177e4 4129 }
4f9838c7 4130 if (task->tk_status >= 0) {
d45f60c6
WAA		 4131 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4132 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4133 }
788e7a89 4134 return 0;
1da177e4
LT		 4135}
4136
5521abfd 4137static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4138 struct nfs_pgio_args *args)
5521abfd
TM		 4139{
4140
4141 if (!nfs4_error_stateid_expired(task->tk_status) ||
4142 nfs4_stateid_is_current(&args->stateid,
4143 args->context,
4144 args->lock_context,
4145 FMODE_WRITE))
4146 return false;
4147 rpc_restart_call_prepare(task);
4148 return true;
4149}
4150
d45f60c6 4151static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4152{
d45f60c6 4153 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4154 return -EAGAIN;
d45f60c6 4155 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4156 return -EAGAIN;
d45f60c6
WAA		 4157 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4158 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4159}
4160
5a37f851 4161static
d45f60c6 4162bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4163{
5a37f851 4164 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4165 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4166 return false;
4167 /* Otherwise, request attributes if and only if we don't hold
4168 * a delegation
4169 */
011e2a7f 4170 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4171}
a69aef14 4172
d45f60c6
WAA		 4173static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4174 struct rpc_message *msg)
1da177e4 4175{
d45f60c6 4176 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4177
d45f60c6
WAA		 4178 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4179 hdr->args.bitmask = NULL;
4180 hdr->res.fattr = NULL;
7ffd1064 4181 } else
d45f60c6 4182 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4183
d45f60c6
WAA		 4184 if (!hdr->pgio_done_cb)
4185 hdr->pgio_done_cb = nfs4_write_done_cb;
4186 hdr->res.server = server;
4187 hdr->timestamp = jiffies;
1da177e4 4188
bdc7f021 4189 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4190 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4191}
4192
0b7c0153 4193static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4194{
d9afbd1b
TM		 4195 nfs4_setup_sequence(NFS_SERVER(data->inode),
4196 &data->args.seq_args,
4197 &data->res.seq_res,
4198 task);
1da177e4
LT		 4199}
4200
0b7c0153 4201static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4202{
1da177e4 4203 struct inode *inode = data->inode;
14516c3a 4204
cc668ab3 4205 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4206 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4207 rpc_restart_call_prepare(task);
788e7a89 4208 return -EAGAIN;
1da177e4 4209 }
788e7a89 4210 return 0;
1da177e4
LT		 4211}
4212
0b7c0153 4213static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4214{
4215 if (!nfs4_sequence_done(task, &data->res.seq_res))
4216 return -EAGAIN;
0b7c0153 4217 return data->commit_done_cb(task, data);
5f452431
FI		 4218}
4219
0b7c0153 4220static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4221{
788e7a89 4222 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4223
0b7c0153
FI		 4224 if (data->commit_done_cb == NULL)
4225 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4226 data->res.server = server;
bdc7f021 4227 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4228 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4229}
4230
9bc4e3ca
CL		 4231struct nfs4_renewdata {
4232 struct nfs_client *client;
4233 unsigned long timestamp;
4234};
4235
1da177e4
LT		 4236/*
4237 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4238 * standalone procedure for queueing an asynchronous RENEW.
4239 */
9bc4e3ca 4240static void nfs4_renew_release(void *calldata)
dc96aef9 4241{
9bc4e3ca
CL		 4242 struct nfs4_renewdata *data = calldata;
4243 struct nfs_client *clp = data->client;
dc96aef9 4244
0851de06
AB		 4245 if (atomic_read(&clp->cl_count) > 1)
4246 nfs4_schedule_state_renewal(clp);
4247 nfs_put_client(clp);
9bc4e3ca 4248 kfree(data);
dc96aef9
AB		 4249}
4250
9bc4e3ca 4251static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4252{
9bc4e3ca
CL		 4253 struct nfs4_renewdata *data = calldata;
4254 struct nfs_client *clp = data->client;
4255 unsigned long timestamp = data->timestamp;
1da177e4 4256
c6d01c6f 4257 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4258 switch (task->tk_status) {
4259 case 0:
4260 break;
4261 case -NFS4ERR_LEASE_MOVED:
4262 nfs4_schedule_lease_moved_recovery(clp);
4263 break;
4264 default:
95baa25c 4265 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4266 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4267 return;
4268 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4269 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4270 return;
4271 }
4272 nfs4_schedule_path_down_recovery(clp);
1da177e4 4273 }
452e9352 4274 do_renew_lease(clp, timestamp);
1da177e4
LT		 4275}
4276
963d8fe5
TM		 4277static const struct rpc_call_ops nfs4_renew_ops = {
4278 .rpc_call_done = nfs4_renew_done,
dc96aef9 4279 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4280};
4281
2f60ea6b 4282static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4283{
4284 struct rpc_message msg = {
4285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4286 .rpc_argp = clp,
b4454fe1 4287 .rpc_cred = cred,
1da177e4 4288 };
9bc4e3ca 4289 struct nfs4_renewdata *data;
1da177e4 4290
2f60ea6b
TM		 4291 if (renew_flags == 0)
4292 return 0;
0851de06
AB		 4293 if (!atomic_inc_not_zero(&clp->cl_count))
4294 return -EIO;
b569ad34 4295 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4296 if (data == NULL)
4297 return -ENOMEM;
4298 data->client = clp;
4299 data->timestamp = jiffies;
bc7a05ca 4300 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4301 &nfs4_renew_ops, data);
1da177e4
LT		 4302}
4303
8534d4ec 4304static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4305{
4306 struct rpc_message msg = {
4307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4308 .rpc_argp = clp,
b4454fe1 4309 .rpc_cred = cred,
1da177e4
LT		 4310 };
4311 unsigned long now = jiffies;
4312 int status;
4313
bc7a05ca 4314 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4315 if (status < 0)
4316 return status;
452e9352 4317 do_renew_lease(clp, now);
1da177e4
LT		 4318 return 0;
4319}
4320
aa1870af
BF		 4321static inline int nfs4_server_supports_acls(struct nfs_server *server)
4322{
7dd7d959 4323 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4324}
4325
21f498c2
TM		 4326/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4327 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4328 * the stack.
4329 */
21f498c2 4330#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4331
e9e3d724
NH		 4332static int buf_to_pages_noslab(const void *buf, size_t buflen,
4333 struct page **pages, unsigned int *pgbase)
4334{
4335 struct page *newpage, **spages;
4336 int rc = 0;
4337 size_t len;
4338 spages = pages;
4339
4340 do {
21f498c2 4341 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4342 newpage = alloc_page(GFP_KERNEL);
4343
4344 if (newpage == NULL)
4345 goto unwind;
4346 memcpy(page_address(newpage), buf, len);
4347 buf += len;
4348 buflen -= len;
4349 *pages++ = newpage;
4350 rc++;
4351 } while (buflen != 0);
4352
4353 return rc;
4354
4355unwind:
4356 for(; rc > 0; rc--)
4357 __free_page(spages[rc-1]);
4358 return -ENOMEM;
4359}
4360
e50a1c2e
BF		 4361struct nfs4_cached_acl {
4362 int cached;
4363 size_t len;
3e9d4154 4364 char data[0];
e50a1c2e
BF		 4365};
4366
4367static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4368{
4369 struct nfs_inode *nfsi = NFS_I(inode);
4370
4371 spin_lock(&inode->i_lock);
4372 kfree(nfsi->nfs4_acl);
4373 nfsi->nfs4_acl = acl;
4374 spin_unlock(&inode->i_lock);
4375}
4376
4377static void nfs4_zap_acl_attr(struct inode *inode)
4378{
4379 nfs4_set_cached_acl(inode, NULL);
4380}
4381
4382static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4383{
4384 struct nfs_inode *nfsi = NFS_I(inode);
4385 struct nfs4_cached_acl *acl;
4386 int ret = -ENOENT;
4387
4388 spin_lock(&inode->i_lock);
4389 acl = nfsi->nfs4_acl;
4390 if (acl == NULL)
4391 goto out;
4392 if (buf == NULL) /* user is just asking for length */
4393 goto out_len;
4394 if (acl->cached == 0)
4395 goto out;
4396 ret = -ERANGE; /* see getxattr(2) man page */
4397 if (acl->len > buflen)
4398 goto out;
4399 memcpy(buf, acl->data, acl->len);
4400out_len:
4401 ret = acl->len;
4402out:
4403 spin_unlock(&inode->i_lock);
4404 return ret;
4405}
4406
5794d21e 4407static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4408{
4409 struct nfs4_cached_acl *acl;
b291f1b1 4410 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4411
1f1ea6c2 4412 if (buflen <= PAGE_SIZE) {
b291f1b1 4413 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4414 if (acl == NULL)
4415 goto out;
4416 acl->cached = 1;
5794d21e 4417 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4418 } else {
4419 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4420 if (acl == NULL)
4421 goto out;
4422 acl->cached = 0;
4423 }
4424 acl->len = acl_len;
4425out:
4426 nfs4_set_cached_acl(inode, acl);
4427}
4428
bf118a34
AA		 4429/*
4430 * The getxattr API returns the required buffer length when called with a
4431 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4432 * the required buf. On a NULL buf, we send a page of data to the server
4433 * guessing that the ACL request can be serviced by a page. If so, we cache
4434 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4435 * the cache. If not so, we throw away the page, and cache the required
4436 * length. The next getxattr call will then produce another round trip to
4437 * the server, this time with the input buf of the required size.
4438 */
16b4289c 4439static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4440{
bf118a34 4441 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4442 struct nfs_getaclargs args = {
4443 .fh = NFS_FH(inode),
4444 .acl_pages = pages,
4445 .acl_len = buflen,
4446 };
663c79b3
BH		 4447 struct nfs_getaclres res = {
4448 .acl_len = buflen,
4449 };
aa1870af
BF		 4450 struct rpc_message msg = {
4451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4452 .rpc_argp = &args,
663c79b3 4453 .rpc_resp = &res,
aa1870af 4454 };
21f498c2
TM		 4455 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4456 int ret = -ENOMEM, i;
aa1870af 4457
bf118a34
AA		 4458 /* As long as we're doing a round trip to the server anyway,
4459 * let's be prepared for a page of acl data. */
4460 if (npages == 0)
4461 npages = 1;
21f498c2
TM		 4462 if (npages > ARRAY_SIZE(pages))
4463 return -ERANGE;
5a006899 4464
bf118a34
AA		 4465 for (i = 0; i < npages; i++) {
4466 pages[i] = alloc_page(GFP_KERNEL);
4467 if (!pages[i])
4468 goto out_free;
e50a1c2e 4469 }
5a006899
SP		 4470
4471 /* for decoding across pages */
4472 res.acl_scratch = alloc_page(GFP_KERNEL);
4473 if (!res.acl_scratch)
4474 goto out_free;
4475
bf118a34
AA		 4476 args.acl_len = npages * PAGE_SIZE;
4477 args.acl_pgbase = 0;
5a006899 4478
de040bec 4479 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4480 __func__, buf, buflen, npages, args.acl_len);
4481 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4482 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4483 if (ret)
4484 goto out_free;
bf118a34 4485
1f1ea6c2
TM		 4486 /* Handle the case where the passed-in buffer is too short */
4487 if (res.acl_flags & NFS4_ACL_TRUNC) {
4488 /* Did the user only issue a request for the acl length? */
4489 if (buf == NULL)
4490 goto out_ok;
e50a1c2e 4491 ret = -ERANGE;
1f1ea6c2 4492 goto out_free;
e50a1c2e 4493 }
1f1ea6c2 4494 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4495 if (buf) {
4496 if (res.acl_len > buflen) {
4497 ret = -ERANGE;
4498 goto out_free;
4499 }
1f1ea6c2 4500 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4501 }
1f1ea6c2
TM		 4502out_ok:
4503 ret = res.acl_len;
e50a1c2e 4504out_free:
bf118a34
AA		 4505 for (i = 0; i < npages; i++)
4506 if (pages[i])
4507 __free_page(pages[i]);
331818f1
TM		 4508 if (res.acl_scratch)
4509 __free_page(res.acl_scratch);
aa1870af
BF		 4510 return ret;
4511}
4512
16b4289c
TM		 4513static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4514{
4515 struct nfs4_exception exception = { };
4516 ssize_t ret;
4517 do {
4518 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4519 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4520 if (ret >= 0)
4521 break;
4522 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4523 } while (exception.retry);
4524 return ret;
4525}
4526
e50a1c2e
BF		 4527static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4528{
4529 struct nfs_server *server = NFS_SERVER(inode);
4530 int ret;
4531
4532 if (!nfs4_server_supports_acls(server))
4533 return -EOPNOTSUPP;
4534 ret = nfs_revalidate_inode(server, inode);
4535 if (ret < 0)
4536 return ret;
08a22b39
AK		 4537 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4538 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4539 ret = nfs4_read_cached_acl(inode, buf, buflen);
4540 if (ret != -ENOENT)
bf118a34
AA		 4541 /* -ENOENT is returned if there is no ACL or if there is an ACL
4542 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4543 return ret;
4544 return nfs4_get_acl_uncached(inode, buf, buflen);
4545}
4546
16b4289c 4547static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4548{
4549 struct nfs_server *server = NFS_SERVER(inode);
4550 struct page *pages[NFS4ACL_MAXPAGES];
4551 struct nfs_setaclargs arg = {
4552 .fh = NFS_FH(inode),
4553 .acl_pages = pages,
4554 .acl_len = buflen,
4555 };
73c403a9 4556 struct nfs_setaclres res;
4b580ee3
BF		 4557 struct rpc_message msg = {
4558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4559 .rpc_argp = &arg,
73c403a9 4560 .rpc_resp = &res,
4b580ee3 4561 };
21f498c2 4562 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4563 int ret, i;
4b580ee3
BF		 4564
4565 if (!nfs4_server_supports_acls(server))
4566 return -EOPNOTSUPP;
21f498c2
TM		 4567 if (npages > ARRAY_SIZE(pages))
4568 return -ERANGE;
e9e3d724
NH		 4569 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4570 if (i < 0)
4571 return i;
57ec14c5 4572 nfs4_inode_return_delegation(inode);
7c513058 4573 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4574
4575 /*
4576 * Free each page after tx, so the only ref left is
4577 * held by the network stack
4578 */
4579 for (; i > 0; i--)
4580 put_page(pages[i-1]);
4581
08a22b39
AK		 4582 /*
4583 * Acl update can result in inode attribute update.
4584 * so mark the attribute cache invalid.
4585 */
4586 spin_lock(&inode->i_lock);
4587 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4588 spin_unlock(&inode->i_lock);
f41f7418
TM		 4589 nfs_access_zap_cache(inode);
4590 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4591 return ret;
4592}
4593
16b4289c
TM		 4594static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4595{
4596 struct nfs4_exception exception = { };
4597 int err;
4598 do {
c1578b76
TM		 4599 err = __nfs4_proc_set_acl(inode, buf, buflen);
4600 trace_nfs4_set_acl(inode, err);
4601 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4602 &exception);
4603 } while (exception.retry);
4604 return err;
4605}
4606
aa9c2669
DQ		 4607#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4608static int _nfs4_get_security_label(struct inode *inode, void *buf,
4609 size_t buflen)
4610{
4611 struct nfs_server *server = NFS_SERVER(inode);
4612 struct nfs_fattr fattr;
4613 struct nfs4_label label = {0, 0, buflen, buf};
4614
4615 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4616 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4617 .fh = NFS_FH(inode),
4618 .bitmask = bitmask,
4619 };
4620 struct nfs4_getattr_res res = {
4621 .fattr = &fattr,
4622 .label = &label,
4623 .server = server,
4624 };
4625 struct rpc_message msg = {
4626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4627 .rpc_argp = &arg,
aa9c2669
DQ		 4628 .rpc_resp = &res,
4629 };
4630 int ret;
4631
4632 nfs_fattr_init(&fattr);
4633
fcb63a9b 4634 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4635 if (ret)
4636 return ret;
4637 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4638 return -ENOENT;
4639 if (buflen < label.len)
4640 return -ERANGE;
4641 return 0;
4642}
4643
4644static int nfs4_get_security_label(struct inode *inode, void *buf,
4645 size_t buflen)
4646{
4647 struct nfs4_exception exception = { };
4648 int err;
4649
4650 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4651 return -EOPNOTSUPP;
4652
4653 do {
c1578b76
TM		 4654 err = _nfs4_get_security_label(inode, buf, buflen);
4655 trace_nfs4_get_security_label(inode, err);
4656 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4657 &exception);
4658 } while (exception.retry);
4659 return err;
4660}
4661
4662static int _nfs4_do_set_security_label(struct inode *inode,
4663 struct nfs4_label *ilabel,
4664 struct nfs_fattr *fattr,
4665 struct nfs4_label *olabel)
4666{
4667
4668 struct iattr sattr = {0};
4669 struct nfs_server *server = NFS_SERVER(inode);
4670 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4671 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4672 .fh = NFS_FH(inode),
4673 .iap = &sattr,
4674 .server = server,
4675 .bitmask = bitmask,
4676 .label = ilabel,
4677 };
4678 struct nfs_setattrres res = {
4679 .fattr = fattr,
4680 .label = olabel,
4681 .server = server,
4682 };
4683 struct rpc_message msg = {
4684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4685 .rpc_argp = &arg,
aa9c2669
DQ		 4686 .rpc_resp = &res,
4687 };
4688 int status;
4689
12207f69 4690 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4691
12207f69 4692 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4693 if (status)
4694 dprintk("%s failed: %d\n", __func__, status);
4695
4696 return status;
4697}
4698
4699static int nfs4_do_set_security_label(struct inode *inode,
4700 struct nfs4_label *ilabel,
4701 struct nfs_fattr *fattr,
4702 struct nfs4_label *olabel)
4703{
4704 struct nfs4_exception exception = { };
4705 int err;
4706
4707 do {
c1578b76
TM		 4708 err = _nfs4_do_set_security_label(inode, ilabel,
4709 fattr, olabel);
4710 trace_nfs4_set_security_label(inode, err);
4711 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4712 &exception);
4713 } while (exception.retry);
4714 return err;
4715}
4716
4717static int
4718nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4719{
4720 struct nfs4_label ilabel, *olabel = NULL;
4721 struct nfs_fattr fattr;
4722 struct rpc_cred *cred;
4723 struct inode *inode = dentry->d_inode;
4724 int status;
4725
4726 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4727 return -EOPNOTSUPP;
4728
4729 nfs_fattr_init(&fattr);
4730
4731 ilabel.pi = 0;
4732 ilabel.lfs = 0;
4733 ilabel.label = (char *)buf;
4734 ilabel.len = buflen;
4735
4736 cred = rpc_lookup_cred();
4737 if (IS_ERR(cred))
4738 return PTR_ERR(cred);
4739
4740 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4741 if (IS_ERR(olabel)) {
4742 status = -PTR_ERR(olabel);
4743 goto out;
4744 }
4745
4746 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4747 if (status == 0)
4748 nfs_setsecurity(inode, &fattr, olabel);
4749
4750 nfs4_label_free(olabel);
4751out:
4752 put_rpccred(cred);
4753 return status;
4754}
4755#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4756
4757
1da177e4 4758static int
aa5190d0 4759nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4760{
aa5190d0
TM		 4761 struct nfs_client *clp = server->nfs_client;
4762
4763 if (task->tk_status >= 0)
1da177e4
LT		 4764 return 0;
4765 switch(task->tk_status) {
a1d0b5ee 4766 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4767 case -NFS4ERR_ADMIN_REVOKED:
4768 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4769 if (state == NULL)
4770 break;
4771 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4772 case -NFS4ERR_OPENMODE:
4773 if (state == NULL)
4774 break;
5d422301 4775 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4776 goto recovery_failed;
0400a6b0 4777 goto wait_on_recovery;
0ced63d1 4778 case -NFS4ERR_EXPIRED:
5d422301
TM		 4779 if (state != NULL) {
4780 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4781 goto recovery_failed;
5d422301 4782 }
1da177e4 4783 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4784 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4785 nfs4_schedule_lease_recovery(clp);
4786 goto wait_on_recovery;
519ae255
CL		 4787 case -NFS4ERR_MOVED:
4788 if (nfs4_schedule_migration_recovery(server) < 0)
4789 goto recovery_failed;
4790 goto wait_on_recovery;
8ef2f8d4
CL		 4791 case -NFS4ERR_LEASE_MOVED:
4792 nfs4_schedule_lease_moved_recovery(clp);
4793 goto wait_on_recovery;
4745e315
AA		 4794#if defined(CONFIG_NFS_V4_1)
4795 case -NFS4ERR_BADSESSION:
4796 case -NFS4ERR_BADSLOT:
4797 case -NFS4ERR_BAD_HIGH_SLOT:
4798 case -NFS4ERR_DEADSESSION:
4799 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4800 case -NFS4ERR_SEQ_FALSE_RETRY:
4801 case -NFS4ERR_SEQ_MISORDERED:
4802 dprintk("%s ERROR %d, Reset session\n", __func__,
4803 task->tk_status);
9f594791 4804 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4805 goto wait_on_recovery;
4745e315 4806#endif /* CONFIG_NFS_V4_1 */
1da177e4 4807 case -NFS4ERR_DELAY:
aa5190d0 4808 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4809 case -NFS4ERR_GRACE:
1da177e4 4810 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4811 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4812 case -NFS4ERR_OLD_STATEID:
f1478c13 4813 goto restart_call;
1da177e4
LT		 4814 }
4815 task->tk_status = nfs4_map_errors(task->tk_status);
4816 return 0;
9f51a78e 4817recovery_failed:
5d422301
TM		 4818 task->tk_status = -EIO;
4819 return 0;
0400a6b0 4820wait_on_recovery:
a2c0b9e2 4821 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4822 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4823 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4824 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4825 goto recovery_failed;
f1478c13 4826restart_call:
a2c0b9e2
TM		 4827 task->tk_status = 0;
4828 return -EAGAIN;
1da177e4
LT		 4829}
4830
f092075d
CL		 4831static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4832 nfs4_verifier *bootverf)
cd93710e
CL		 4833{
4834 __be32 verf[2];
4835
2c820d9a
CL		 4836 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4837 /* An impossible timestamp guarantees this value
4838 * will never match a generated boot time. */
4839 verf[0] = 0;
17f26b12 4840 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4841 } else {
f092075d 4842 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4843 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4844 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4845 }
cd93710e
CL		 4846 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4847}
4848
e984a55a
CL		 4849static unsigned int
4850nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4851 char *buf, size_t len)
4852{
4853 unsigned int result;
4854
4855 rcu_read_lock();
4856 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4857 clp->cl_ipaddr,
4858 rpc_peeraddr2str(clp->cl_rpcclient,
4859 RPC_DISPLAY_ADDR),
4860 rpc_peeraddr2str(clp->cl_rpcclient,
4861 RPC_DISPLAY_PROTO));
4862 rcu_read_unlock();
4863 return result;
4864}
4865
4866static unsigned int
4867nfs4_init_uniform_client_string(const struct nfs_client *clp,
4868 char *buf, size_t len)
4869{
55b59293 4870 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4871
4872 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4873 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4874 clp->rpc_ops->version,
4875 clp->cl_minorversion,
4876 nfs4_client_id_uniquifier,
4877 nodename);
e984a55a
CL		 4878 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4879 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4880 nodename);
e984a55a
CL		 4881}
4882
706cb8db
CL		 4883/*
4884 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4885 * services. Advertise one based on the address family of the
4886 * clientaddr.
4887 */
4888static unsigned int
4889nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4890{
4891 if (strchr(clp->cl_ipaddr, ':') != NULL)
4892 return scnprintf(buf, len, "tcp6");
4893 else
4894 return scnprintf(buf, len, "tcp");
4895}
4896
6bbb4ae8
CL		 4897/**
4898 * nfs4_proc_setclientid - Negotiate client ID
4899 * @clp: state data structure
4900 * @program: RPC program for NFSv4 callback service
4901 * @port: IP port number for NFS4 callback service
4902 * @cred: RPC credential to use for this call
4903 * @res: where to place the result
4904 *
4905 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4906 */
bb8b27e5
TM		 4907int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4908 unsigned short port, struct rpc_cred *cred,
4909 struct nfs4_setclientid_res *res)
1da177e4
LT		 4910{
4911 nfs4_verifier sc_verifier;
4912 struct nfs4_setclientid setclientid = {
4913 .sc_verifier = &sc_verifier,
4914 .sc_prog = program,
f4eecd5d 4915 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4916 };
4917 struct rpc_message msg = {
4918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4919 .rpc_argp = &setclientid,
bb8b27e5 4920 .rpc_resp = res,
286d7d6a 4921 .rpc_cred = cred,
1da177e4 4922 };
6bbb4ae8 4923 int status;
1da177e4 4924
de734831 4925 /* nfs_client_id4 */
f092075d 4926 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4927 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4928 setclientid.sc_name_len =
4929 nfs4_init_uniform_client_string(clp,
4930 setclientid.sc_name,
4931 sizeof(setclientid.sc_name));
4932 else
4933 setclientid.sc_name_len =
4934 nfs4_init_nonuniform_client_string(clp,
4935 setclientid.sc_name,
4936 sizeof(setclientid.sc_name));
de734831 4937 /* cb_client4 */
706cb8db
CL		 4938 setclientid.sc_netid_len =
4939 nfs4_init_callback_netid(clp,
4940 setclientid.sc_netid,
4941 sizeof(setclientid.sc_netid));
de734831 4942 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4943 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4944 clp->cl_ipaddr, port >> 8, port & 255);
4945
6bbb4ae8
CL		 4946 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4947 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4948 setclientid.sc_name_len, setclientid.sc_name);
4949 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4950 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4951 dprintk("NFS reply setclientid: %d\n", status);
4952 return status;
1da177e4
LT		 4953}
4954
6bbb4ae8
CL		 4955/**
4956 * nfs4_proc_setclientid_confirm - Confirm client ID
4957 * @clp: state data structure
4958 * @res: result of a previous SETCLIENTID
4959 * @cred: RPC credential to use for this call
4960 *
4961 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4962 */
fd954ae1 4963int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4964 struct nfs4_setclientid_res *arg,
4965 struct rpc_cred *cred)
1da177e4 4966{
1da177e4
LT		 4967 struct rpc_message msg = {
4968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4969 .rpc_argp = arg,
286d7d6a 4970 .rpc_cred = cred,
1da177e4 4971 };
1da177e4
LT		 4972 int status;
4973
6bbb4ae8
CL		 4974 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4975 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4976 clp->cl_clientid);
1bd714f2 4977 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4978 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4979 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4980 return status;
4981}
4982
fe650407
TM		 4983struct nfs4_delegreturndata {
4984 struct nfs4_delegreturnargs args;
fa178f29 4985 struct nfs4_delegreturnres res;
fe650407
TM		 4986 struct nfs_fh fh;
4987 nfs4_stateid stateid;
26e976a8 4988 unsigned long timestamp;
fa178f29 4989 struct nfs_fattr fattr;
fe650407
TM		 4990 int rpc_status;
4991};
4992
fe650407
TM		 4993static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4994{
4995 struct nfs4_delegreturndata *data = calldata;
938e1010 4996
14516c3a
TM		 4997 if (!nfs4_sequence_done(task, &data->res.seq_res))
4998 return;
938e1010 4999
ca8acf8d 5000 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5001 switch (task->tk_status) {
79708861 5002 case 0:
fa178f29 5003 renew_lease(data->res.server, data->timestamp);
79708861 5004 break;
c97cf606
TM		 5005 case -NFS4ERR_ADMIN_REVOKED:
5006 case -NFS4ERR_DELEG_REVOKED:
5007 case -NFS4ERR_BAD_STATEID:
5008 case -NFS4ERR_OLD_STATEID:
5009 case -NFS4ERR_STALE_STATEID:
5010 case -NFS4ERR_EXPIRED:
5011 task->tk_status = 0;
5012 break;
79708861
RL		 5013 default:
5014 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5015 -EAGAIN) {
d00c5d43 5016 rpc_restart_call_prepare(task);
79708861
RL		 5017 return;
5018 }
5019 }
5020 data->rpc_status = task->tk_status;
fe650407
TM		 5021}
5022
5023static void nfs4_delegreturn_release(void *calldata)
5024{
fe650407
TM		 5025 kfree(calldata);
5026}
5027
938e1010
AA		 5028static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5029{
5030 struct nfs4_delegreturndata *d_data;
5031
5032 d_data = (struct nfs4_delegreturndata *)data;
5033
d9afbd1b
TM		 5034 nfs4_setup_sequence(d_data->res.server,
5035 &d_data->args.seq_args,
5036 &d_data->res.seq_res,
5037 task);
938e1010 5038}
938e1010 5039
c8d149f3 5040static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5041 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5042 .rpc_call_done = nfs4_delegreturn_done,
5043 .rpc_release = nfs4_delegreturn_release,
5044};
5045
e6f81075 5046static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5047{
5048 struct nfs4_delegreturndata *data;
fa178f29 5049 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5050 struct rpc_task *task;
5138fde0
TM		 5051 struct rpc_message msg = {
5052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5053 .rpc_cred = cred,
5054 };
c970aa85
TM		 5055 struct rpc_task_setup task_setup_data = {
5056 .rpc_client = server->client,
5138fde0 5057 .rpc_message = &msg,
c970aa85
TM		 5058 .callback_ops = &nfs4_delegreturn_ops,
5059 .flags = RPC_TASK_ASYNC,
5060 };
e6f81075 5061 int status = 0;
fe650407 5062
8535b2be 5063 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5064 if (data == NULL)
5065 return -ENOMEM;
a9c92d6b 5066 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5067 data->args.fhandle = &data->fh;
5068 data->args.stateid = &data->stateid;
9e907fec 5069 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5070 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5071 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5072 data->res.fattr = &data->fattr;
5073 data->res.server = server;
5138fde0 5074 nfs_fattr_init(data->res.fattr);
26e976a8 5075 data->timestamp = jiffies;
fe650407
TM		 5076 data->rpc_status = 0;
5077
c970aa85 5078 task_setup_data.callback_data = data;
1174dd1f
TM		 5079 msg.rpc_argp = &data->args;
5080 msg.rpc_resp = &data->res;
c970aa85 5081 task = rpc_run_task(&task_setup_data);
7a1218a2 5082 if (IS_ERR(task))
fe650407 5083 return PTR_ERR(task);
e6f81075
TM		 5084 if (!issync)
5085 goto out;
fe650407 5086 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5087 if (status != 0)
5088 goto out;
5089 status = data->rpc_status;
e144cbcc
TM		 5090 if (status == 0)
5091 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5092 else
5093 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5094out:
e6b3c4db 5095 rpc_put_task(task);
fe650407 5096 return status;
1da177e4
LT		 5097}
5098
e6f81075 5099int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5100{
5101 struct nfs_server *server = NFS_SERVER(inode);
5102 struct nfs4_exception exception = { };
5103 int err;
5104 do {
e6f81075 5105 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5106 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5107 switch (err) {
5108 case -NFS4ERR_STALE_STATEID:
5109 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5110 case 0:
5111 return 0;
5112 }
5113 err = nfs4_handle_exception(server, err, &exception);
5114 } while (exception.retry);
5115 return err;
5116}
5117
5118#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5119#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5120
5121/*
5122 * sleep, with exponential backoff, and retry the LOCK operation.
5123 */
5124static unsigned long
5125nfs4_set_lock_task_retry(unsigned long timeout)
5126{
416ad3c9 5127 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5128 timeout <<= 1;
5129 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5130 return NFS4_LOCK_MAXTIMEOUT;
5131 return timeout;
5132}
5133
1da177e4
LT		 5134static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5135{
5136 struct inode *inode = state->inode;
5137 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5138 struct nfs_client *clp = server->nfs_client;
911d1aaf 5139 struct nfs_lockt_args arg = {
1da177e4 5140 .fh = NFS_FH(inode),
911d1aaf 5141 .fl = request,
1da177e4 5142 };
911d1aaf
TM		 5143 struct nfs_lockt_res res = {
5144 .denied = request,
1da177e4
LT		 5145 };
5146 struct rpc_message msg = {
5147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5148 .rpc_argp = &arg,
5149 .rpc_resp = &res,
5150 .rpc_cred = state->owner->so_cred,
5151 };
1da177e4
LT		 5152 struct nfs4_lock_state *lsp;
5153 int status;
5154
911d1aaf 5155 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5156 status = nfs4_set_lock_state(state, request);
5157 if (status != 0)
5158 goto out;
5159 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5160 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5161 arg.lock_owner.s_dev = server->s_dev;
7c513058 5162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5163 switch (status) {
5164 case 0:
5165 request->fl_type = F_UNLCK;
5166 break;
5167 case -NFS4ERR_DENIED:
5168 status = 0;
1da177e4 5169 }
70cc6487 5170 request->fl_ops->fl_release_private(request);
a6f951dd 5171 request->fl_ops = NULL;
8d0a8a9d 5172out:
1da177e4
LT		 5173 return status;
5174}
5175
5176static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5177{
5178 struct nfs4_exception exception = { };
5179 int err;
5180
5181 do {
d1b748a5
TM		 5182 err = _nfs4_proc_getlk(state, cmd, request);
5183 trace_nfs4_get_lock(request, state, cmd, err);
5184 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5185 &exception);
5186 } while (exception.retry);
5187 return err;
5188}
5189
5190static int do_vfs_lock(struct file *file, struct file_lock *fl)
5191{
5192 int res = 0;
5193 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5194 case FL_POSIX:
5195 res = posix_lock_file_wait(file, fl);
5196 break;
5197 case FL_FLOCK:
5198 res = flock_lock_file_wait(file, fl);
5199 break;
5200 default:
5201 BUG();
5202 }
1da177e4
LT		 5203 return res;
5204}
5205
faf5f49c 5206struct nfs4_unlockdata {
911d1aaf
TM		 5207 struct nfs_locku_args arg;
5208 struct nfs_locku_res res;
faf5f49c
TM		 5209 struct nfs4_lock_state *lsp;
5210 struct nfs_open_context *ctx;
911d1aaf
TM		 5211 struct file_lock fl;
5212 const struct nfs_server *server;
26e976a8 5213 unsigned long timestamp;
faf5f49c
TM		 5214};
5215
911d1aaf
TM		 5216static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5217 struct nfs_open_context *ctx,
5218 struct nfs4_lock_state *lsp,
5219 struct nfs_seqid *seqid)
5220{
5221 struct nfs4_unlockdata *p;
5222 struct inode *inode = lsp->ls_state->inode;
5223
8535b2be 5224 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5225 if (p == NULL)
5226 return NULL;
5227 p->arg.fh = NFS_FH(inode);
5228 p->arg.fl = &p->fl;
5229 p->arg.seqid = seqid;
c1d51931 5230 p->res.seqid = seqid;
911d1aaf
TM		 5231 p->arg.stateid = &lsp->ls_stateid;
5232 p->lsp = lsp;
5233 atomic_inc(&lsp->ls_count);
5234 /* Ensure we don't close file until we're done freeing locks! */
5235 p->ctx = get_nfs_open_context(ctx);
5236 memcpy(&p->fl, fl, sizeof(p->fl));
5237 p->server = NFS_SERVER(inode);
5238 return p;
5239}
5240
06f814a3 5241static void nfs4_locku_release_calldata(void *data)
faf5f49c 5242{
963d8fe5 5243 struct nfs4_unlockdata *calldata = data;
911d1aaf 5244 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5245 nfs4_put_lock_state(calldata->lsp);
5246 put_nfs_open_context(calldata->ctx);
5247 kfree(calldata);
faf5f49c
TM		 5248}
5249
963d8fe5 5250static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5251{
963d8fe5 5252 struct nfs4_unlockdata *calldata = data;
faf5f49c 5253
14516c3a
TM		 5254 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5255 return;
faf5f49c
TM		 5256 switch (task->tk_status) {
5257 case 0:
f597c537
TM		 5258 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5259 &calldata->res.stateid);
26e976a8 5260 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5261 break;
9e33bed5
TM		 5262 case -NFS4ERR_BAD_STATEID:
5263 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5264 case -NFS4ERR_STALE_STATEID:
5265 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5266 break;
5267 default:
9e33bed5 5268 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5269 rpc_restart_call_prepare(task);
faf5f49c 5270 }
2b1bc308 5271 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5272}
5273
4ce70ada 5274static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5275{
4ce70ada 5276 struct nfs4_unlockdata *calldata = data;
faf5f49c 5277
911d1aaf 5278 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5279 goto out_wait;
795a88c9 5280 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5281 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5282 goto out_no_action;
faf5f49c 5283 }
26e976a8 5284 calldata->timestamp = jiffies;
035168ab 5285 if (nfs4_setup_sequence(calldata->server,
a893693c 5286 &calldata->arg.seq_args,
2240a9e2
TM		 5287 &calldata->res.seq_res,
5288 task) != 0)
5289 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5290 return;
5291out_no_action:
5292 task->tk_action = NULL;
5293out_wait:
5294 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5295}
5296
963d8fe5 5297static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5298 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5299 .rpc_call_done = nfs4_locku_done,
06f814a3 5300 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5301};
5302
a5d16a4d
TM		 5303static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5304 struct nfs_open_context *ctx,
5305 struct nfs4_lock_state *lsp,
5306 struct nfs_seqid *seqid)
5307{
5308 struct nfs4_unlockdata *data;
5138fde0
TM		 5309 struct rpc_message msg = {
5310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5311 .rpc_cred = ctx->cred,
5312 };
c970aa85
TM		 5313 struct rpc_task_setup task_setup_data = {
5314 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5315 .rpc_message = &msg,
c970aa85 5316 .callback_ops = &nfs4_locku_ops,
101070ca 5317 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5318 .flags = RPC_TASK_ASYNC,
5319 };
a5d16a4d 5320
fa940720
WAA		 5321 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5322 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5323
137d6aca
FF		 5324 /* Ensure this is an unlock - when canceling a lock, the
5325 * canceled lock is passed in, and it won't be an unlock.
5326 */
5327 fl->fl_type = F_UNLCK;
5328
a5d16a4d
TM		 5329 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5330 if (data == NULL) {
5331 nfs_free_seqid(seqid);
5332 return ERR_PTR(-ENOMEM);
5333 }
5334
a9c92d6b 5335 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5336 msg.rpc_argp = &data->arg;
5337 msg.rpc_resp = &data->res;
c970aa85
TM		 5338 task_setup_data.callback_data = data;
5339 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5340}
5341
faf5f49c
TM		 5342static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5343{
65b62a29
TM		 5344 struct inode *inode = state->inode;
5345 struct nfs4_state_owner *sp = state->owner;
5346 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5347 struct nfs_seqid *seqid;
1da177e4 5348 struct nfs4_lock_state *lsp;
06f814a3
TM		 5349 struct rpc_task *task;
5350 int status = 0;
536ff0f8 5351 unsigned char fl_flags = request->fl_flags;
faf5f49c 5352
8d0a8a9d 5353 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5354 /* Unlock _before_ we do the RPC call */
5355 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5356 /* Exclude nfs_delegation_claim_locks() */
5357 mutex_lock(&sp->so_delegreturn_mutex);
5358 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5359 down_read(&nfsi->rwsem);
5360 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5361 up_read(&nfsi->rwsem);
65b62a29 5362 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5363 goto out;
19e03c57
TM		 5364 }
5365 up_read(&nfsi->rwsem);
65b62a29 5366 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5367 if (status != 0)
9b073574
TM		 5368 goto out;
5369 /* Is this a delegated lock? */
8d0a8a9d 5370 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5371 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5372 goto out;
8535b2be 5373 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5374 status = -ENOMEM;
911d1aaf 5375 if (seqid == NULL)
9b073574 5376 goto out;
cd3758e3 5377 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5378 status = PTR_ERR(task);
5379 if (IS_ERR(task))
9b073574 5380 goto out;
a5d16a4d 5381 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5382 rpc_put_task(task);
9b073574 5383out:
536ff0f8 5384 request->fl_flags = fl_flags;
d1b748a5 5385 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5386 return status;
5387}
5388
a5d16a4d
TM		 5389struct nfs4_lockdata {
5390 struct nfs_lock_args arg;
5391 struct nfs_lock_res res;
5392 struct nfs4_lock_state *lsp;
5393 struct nfs_open_context *ctx;
5394 struct file_lock fl;
26e976a8 5395 unsigned long timestamp;
a5d16a4d
TM		 5396 int rpc_status;
5397 int cancelled;
66179efe 5398 struct nfs_server *server;
a5d16a4d
TM		 5399};
5400
5401static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5402 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5403 gfp_t gfp_mask)
1da177e4 5404{
a5d16a4d
TM		 5405 struct nfs4_lockdata *p;
5406 struct inode *inode = lsp->ls_state->inode;
1da177e4 5407 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5408
8535b2be 5409 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5410 if (p == NULL)
5411 return NULL;
5412
5413 p->arg.fh = NFS_FH(inode);
5414 p->arg.fl = &p->fl;
8535b2be 5415 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5416 if (p->arg.open_seqid == NULL)
5417 goto out_free;
8535b2be 5418 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5419 if (p->arg.lock_seqid == NULL)
2f74c0a0 5420 goto out_free_seqid;
a5d16a4d 5421 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5422 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5423 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5424 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5425 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5426 p->lsp = lsp;
66179efe 5427 p->server = server;
a5d16a4d
TM		 5428 atomic_inc(&lsp->ls_count);
5429 p->ctx = get_nfs_open_context(ctx);
5430 memcpy(&p->fl, fl, sizeof(p->fl));
5431 return p;
2f74c0a0
TM		 5432out_free_seqid:
5433 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5434out_free:
5435 kfree(p);
5436 return NULL;
5437}
5438
5439static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5440{
5441 struct nfs4_lockdata *data = calldata;
5442 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5443
3110ff80 5444 dprintk("%s: begin!\n", __func__);
2f74c0a0 5445 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5446 goto out_wait;
a5d16a4d
TM		 5447 /* Do we need to do an open_to_lock_owner? */
5448 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5449 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5450 goto out_release_lock_seqid;
8fe72bac 5451 }
8e472f33 5452 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5453 data->arg.new_lock_owner = 1;
c1d51931 5454 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5455 } else
5456 data->arg.new_lock_owner = 0;
5d422301
TM		 5457 if (!nfs4_valid_open_stateid(state)) {
5458 data->rpc_status = -EBADF;
5459 task->tk_action = NULL;
5460 goto out_release_open_seqid;
5461 }
26e976a8 5462 data->timestamp = jiffies;
035168ab
TM		 5463 if (nfs4_setup_sequence(data->server,
5464 &data->arg.seq_args,
2240a9e2 5465 &data->res.seq_res,
d9afbd1b 5466 task) == 0)
66179efe 5467 return;
5d422301 5468out_release_open_seqid:
2240a9e2
TM		 5469 nfs_release_seqid(data->arg.open_seqid);
5470out_release_lock_seqid:
5471 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5472out_wait:
5473 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5474 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5475}
5476
a5d16a4d
TM		 5477static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5478{
5479 struct nfs4_lockdata *data = calldata;
5480
3110ff80 5481 dprintk("%s: begin!\n", __func__);
a5d16a4d 5482
14516c3a
TM		 5483 if (!nfs4_sequence_done(task, &data->res.seq_res))
5484 return;
66179efe 5485
a5d16a4d 5486 data->rpc_status = task->tk_status;
a5d16a4d 5487 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5488 if (data->rpc_status == 0)
5489 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5490 else
5491 goto out;
5492 }
5493 if (data->rpc_status == 0) {
f597c537 5494 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5495 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5496 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5497 }
a5d16a4d 5498out:
3110ff80 5499 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5500}
5501
5502static void nfs4_lock_release(void *calldata)
5503{
5504 struct nfs4_lockdata *data = calldata;
5505
3110ff80 5506 dprintk("%s: begin!\n", __func__);
2f74c0a0 5507 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5508 if (data->cancelled != 0) {
5509 struct rpc_task *task;
5510 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5511 data->arg.lock_seqid);
5512 if (!IS_ERR(task))
bf294b41 5513 rpc_put_task_async(task);
3110ff80 5514 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5515 } else
5516 nfs_free_seqid(data->arg.lock_seqid);
5517 nfs4_put_lock_state(data->lsp);
5518 put_nfs_open_context(data->ctx);
5519 kfree(data);
3110ff80 5520 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5521}
5522
5523static const struct rpc_call_ops nfs4_lock_ops = {
5524 .rpc_call_prepare = nfs4_lock_prepare,
5525 .rpc_call_done = nfs4_lock_done,
5526 .rpc_release = nfs4_lock_release,
5527};
5528
2bee72a6
TM		 5529static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5530{
2bee72a6
TM		 5531 switch (error) {
5532 case -NFS4ERR_ADMIN_REVOKED:
5533 case -NFS4ERR_BAD_STATEID:
ecac799a 5534 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5535 if (new_lock_owner != 0 ||
795a88c9 5536 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5537 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5538 break;
5539 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5540 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5541 case -NFS4ERR_EXPIRED:
5542 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5543 };
5544}
5545
afe6c27c 5546static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5547{
5548 struct nfs4_lockdata *data;
5549 struct rpc_task *task;
5138fde0
TM		 5550 struct rpc_message msg = {
5551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5552 .rpc_cred = state->owner->so_cred,
5553 };
c970aa85
TM		 5554 struct rpc_task_setup task_setup_data = {
5555 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5556 .rpc_message = &msg,
c970aa85 5557 .callback_ops = &nfs4_lock_ops,
101070ca 5558 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5559 .flags = RPC_TASK_ASYNC,
5560 };
a5d16a4d
TM		 5561 int ret;
5562
3110ff80 5563 dprintk("%s: begin!\n", __func__);
cd3758e3 5564 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5565 fl->fl_u.nfs4_fl.owner,
5566 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5567 if (data == NULL)
5568 return -ENOMEM;
5569 if (IS_SETLKW(cmd))
5570 data->arg.block = 1;
a9c92d6b 5571 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5572 msg.rpc_argp = &data->arg;
5573 msg.rpc_resp = &data->res;
c970aa85 5574 task_setup_data.callback_data = data;
8fe72bac
TM		 5575 if (recovery_type > NFS_LOCK_NEW) {
5576 if (recovery_type == NFS_LOCK_RECLAIM)
5577 data->arg.reclaim = NFS_LOCK_RECLAIM;
5578 nfs4_set_sequence_privileged(&data->arg.seq_args);
5579 }
c970aa85 5580 task = rpc_run_task(&task_setup_data);
7a1218a2 5581 if (IS_ERR(task))
a5d16a4d 5582 return PTR_ERR(task);
a5d16a4d
TM		 5583 ret = nfs4_wait_for_completion_rpc_task(task);
5584 if (ret == 0) {
5585 ret = data->rpc_status;
2bee72a6
TM		 5586 if (ret)
5587 nfs4_handle_setlk_error(data->server, data->lsp,
5588 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5589 } else
5590 data->cancelled = 1;
e6b3c4db 5591 rpc_put_task(task);
3110ff80 5592 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5593 return ret;
1da177e4
LT		 5594}
5595
5596static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5597{
202b50dc 5598 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5599 struct nfs4_exception exception = {
5600 .inode = state->inode,
5601 };
202b50dc
TM		 5602 int err;
5603
5604 do {
42a2d13e
TM		 5605 /* Cache the lock if possible... */
5606 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5607 return 0;
afe6c27c 5608 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5609 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5610 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5611 break;
5612 nfs4_handle_exception(server, err, &exception);
5613 } while (exception.retry);
5614 return err;
1da177e4
LT		 5615}
5616
5617static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5618{
202b50dc 5619 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5620 struct nfs4_exception exception = {
5621 .inode = state->inode,
5622 };
202b50dc
TM		 5623 int err;
5624
6bfc93ef
TM		 5625 err = nfs4_set_lock_state(state, request);
5626 if (err != 0)
5627 return err;
f6de7a39 5628 if (!recover_lost_locks) {
ef1820f9
N		 5629 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5630 return 0;
5631 }
202b50dc 5632 do {
42a2d13e
TM		 5633 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5634 return 0;
afe6c27c 5635 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5636 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5637 switch (err) {
5638 default:
5639 goto out;
5640 case -NFS4ERR_GRACE:
5641 case -NFS4ERR_DELAY:
5642 nfs4_handle_exception(server, err, &exception);
5643 err = 0;
5644 }
202b50dc 5645 } while (exception.retry);
a9ed2e25 5646out:
202b50dc 5647 return err;
1da177e4
LT		 5648}
5649
f062eb6c 5650#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5651/**
5652 * nfs41_check_expired_locks - possibly free a lock stateid
5653 *
5654 * @state: NFSv4 state for an inode
5655 *
5656 * Returns NFS_OK if recovery for this stateid is now finished.
5657 * Otherwise a negative NFS4ERR value is returned.
5658 */
b01dd1d8 5659static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5660{
eb64cf96 5661 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5662 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5663 struct nfs_server *server = NFS_SERVER(state->inode);
5664
b01dd1d8 5665 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5666 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5667 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5668
5669 status = nfs41_test_stateid(server,
5670 &lsp->ls_stateid,
5671 cred);
08cb47fa 5672 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5673 if (status != NFS_OK) {
3e60ffdd
CL		 5674 /* Free the stateid unless the server
5675 * informs us the stateid is unrecognized. */
89af2739
CL		 5676 if (status != -NFS4ERR_BAD_STATEID)
5677 nfs41_free_stateid(server,
ab7cb0df
TM		 5678 &lsp->ls_stateid,
5679 cred);
795a88c9 5680 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5681 ret = status;
5682 }
5683 }
5684 };
5685
5686 return ret;
5687}
5688
5689static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5690{
5691 int status = NFS_OK;
5692
5693 if (test_bit(LK_STATE_IN_USE, &state->flags))
5694 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5695 if (status != NFS_OK)
5696 status = nfs4_lock_expired(state, request);
5697 return status;
f062eb6c
BS		 5698}
5699#endif
5700
1da177e4
LT		 5701static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5702{
9a99af49 5703 struct nfs4_state_owner *sp = state->owner;
19e03c57 5704 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5705 unsigned char fl_flags = request->fl_flags;
9a99af49 5706 unsigned int seq;
8e469ebd 5707 int status = -ENOLCK;
1da177e4 5708
8e469ebd
TM		 5709 if ((fl_flags & FL_POSIX) &&
5710 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5711 goto out;
6bfc93ef 5712 /* Is this a delegated open? */
6bfc93ef
TM		 5713 status = nfs4_set_lock_state(state, request);
5714 if (status != 0)
5715 goto out;
01c3b861
TM		 5716 request->fl_flags |= FL_ACCESS;
5717 status = do_vfs_lock(request->fl_file, request);
5718 if (status < 0)
5719 goto out;
19e03c57 5720 down_read(&nfsi->rwsem);
01c3b861 5721 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5722 /* Yes: cache locks! */
01c3b861 5723 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5724 request->fl_flags = fl_flags & ~FL_SLEEP;
5725 status = do_vfs_lock(request->fl_file, request);
5726 goto out_unlock;
01c3b861 5727 }
9a99af49
TM		 5728 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5729 up_read(&nfsi->rwsem);
afe6c27c 5730 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5731 if (status != 0)
9a99af49
TM		 5732 goto out;
5733 down_read(&nfsi->rwsem);
5734 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5735 status = -NFS4ERR_DELAY;
01c3b861 5736 goto out_unlock;
9a99af49 5737 }
6bfc93ef 5738 /* Note: we always want to sleep here! */
01c3b861 5739 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5740 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5741 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5742 "manager!\n", __func__);
01c3b861 5743out_unlock:
19e03c57 5744 up_read(&nfsi->rwsem);
01c3b861
TM		 5745out:
5746 request->fl_flags = fl_flags;
1da177e4
LT		 5747 return status;
5748}
5749
5750static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5751{
a1d0b5ee
TM		 5752 struct nfs4_exception exception = {
5753 .state = state,
05ffe24f 5754 .inode = state->inode,
a1d0b5ee 5755 };
1da177e4
LT		 5756 int err;
5757
5758 do {
965b5d67 5759 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5760 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5761 if (err == -NFS4ERR_DENIED)
5762 err = -EAGAIN;
1da177e4 5763 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5764 err, &exception);
1da177e4
LT		 5765 } while (exception.retry);
5766 return err;
5767}
5768
5769static int
5770nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5771{
5772 struct nfs_open_context *ctx;
5773 struct nfs4_state *state;
5774 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5775 int status;
5776
5777 /* verify open state */
cd3758e3 5778 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5779 state = ctx->state;
5780
5781 if (request->fl_start < 0 || request->fl_end < 0)
5782 return -EINVAL;
5783
d953126a
TM		 5784 if (IS_GETLK(cmd)) {
5785 if (state != NULL)
5786 return nfs4_proc_getlk(state, F_GETLK, request);
5787 return 0;
5788 }
1da177e4
LT		 5789
5790 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5791 return -EINVAL;
5792
d953126a
TM		 5793 if (request->fl_type == F_UNLCK) {
5794 if (state != NULL)
5795 return nfs4_proc_unlck(state, cmd, request);
5796 return 0;
5797 }
1da177e4 5798
d953126a
TM		 5799 if (state == NULL)
5800 return -ENOLCK;
55725513
TM		 5801 /*
5802 * Don't rely on the VFS having checked the file open mode,
5803 * since it won't do this for flock() locks.
5804 */
f44106e2 5805 switch (request->fl_type) {
55725513
TM		 5806 case F_RDLCK:
5807 if (!(filp->f_mode & FMODE_READ))
5808 return -EBADF;
5809 break;
5810 case F_WRLCK:
5811 if (!(filp->f_mode & FMODE_WRITE))
5812 return -EBADF;
5813 }
5814
1da177e4
LT		 5815 do {
5816 status = nfs4_proc_setlk(state, cmd, request);
5817 if ((status != -EAGAIN) || IS_SETLK(cmd))
5818 break;
5819 timeout = nfs4_set_lock_task_retry(timeout);
5820 status = -ERESTARTSYS;
5821 if (signalled())
5822 break;
5823 } while(status < 0);
1da177e4
LT		 5824 return status;
5825}
5826
db4f2e63 5827int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5828{
5829 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5830 int err;
5831
5832 err = nfs4_set_lock_state(state, fl);
5833 if (err != 0)
db4f2e63 5834 return err;
4a706fa0 5835 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5836 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5837}
6b3b5496 5838
cf470c3e
TM		 5839struct nfs_release_lockowner_data {
5840 struct nfs4_lock_state *lsp;
5ae67c4f 5841 struct nfs_server *server;
cf470c3e 5842 struct nfs_release_lockowner_args args;
b7e63a10 5843 struct nfs_release_lockowner_res res;
60ea6812 5844 unsigned long timestamp;
cf470c3e
TM		 5845};
5846
fbd4bfd1
CL		 5847static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5848{
5849 struct nfs_release_lockowner_data *data = calldata;
5850 nfs40_setup_sequence(data->server,
b7e63a10 5851 &data->args.seq_args, &data->res.seq_res, task);
60ea6812 5852 data->timestamp = jiffies;
fbd4bfd1
CL		 5853}
5854
5855static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5856{
5857 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5858 struct nfs_server *server = data->server;
5859
b7e63a10 5860 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5861
5862 switch (task->tk_status) {
5863 case 0:
5864 renew_lease(server, data->timestamp);
5865 break;
5866 case -NFS4ERR_STALE_CLIENTID:
5867 case -NFS4ERR_EXPIRED:
5868 case -NFS4ERR_LEASE_MOVED:
5869 case -NFS4ERR_DELAY:
5870 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5871 rpc_restart_call_prepare(task);
5872 }
fbd4bfd1
CL		 5873}
5874
d3c7b7cc
TM		 5875static void nfs4_release_lockowner_release(void *calldata)
5876{
cf470c3e 5877 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5878 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5879 kfree(calldata);
5880}
5881
17280175 5882static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5883 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5884 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5885 .rpc_release = nfs4_release_lockowner_release,
5886};
5887
c8b2d0bf 5888static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5889{
cf470c3e 5890 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5891 struct rpc_message msg = {
5892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5893 };
5894
5895 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5896 return -EINVAL;
fbd4bfd1 5897
cf470c3e
TM		 5898 data = kmalloc(sizeof(*data), GFP_NOFS);
5899 if (!data)
5900 return -ENOMEM;
5901 data->lsp = lsp;
5ae67c4f 5902 data->server = server;
cf470c3e
TM		 5903 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5904 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5905 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5906
cf470c3e 5907 msg.rpc_argp = &data->args;
b7e63a10
TM		 5908 msg.rpc_resp = &data->res;
5909 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e
TM		 5910 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5911 return 0;
d3c7b7cc
TM		 5912}
5913
aa1870af
BF		 5914#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5915
64c2ce8b
AK		 5916static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5917 const void *buf, size_t buflen,
5918 int flags, int type)
6b3b5496 5919{
64c2ce8b
AK		 5920 if (strcmp(key, "") != 0)
5921 return -EINVAL;
4b580ee3 5922
64c2ce8b 5923 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5924}
5925
64c2ce8b
AK		 5926static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5927 void *buf, size_t buflen, int type)
6b3b5496 5928{
64c2ce8b
AK		 5929 if (strcmp(key, "") != 0)
5930 return -EINVAL;
aa1870af 5931
64c2ce8b 5932 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5933}
5934
64c2ce8b
AK		 5935static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5936 size_t list_len, const char *name,
5937 size_t name_len, int type)
6b3b5496 5938{
64c2ce8b 5939 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5940
096455a2
BF		 5941 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5942 return 0;
64c2ce8b
AK		 5943
5944 if (list && len <= list_len)
5945 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5946 return len;
6b3b5496
BF		 5947}
5948
c9bccef6
DQ		 5949#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5950static inline int nfs4_server_supports_labels(struct nfs_server *server)
5951{
5952 return server->caps & NFS_CAP_SECURITY_LABEL;
5953}
5954
5955static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5956 const void *buf, size_t buflen,
5957 int flags, int type)
5958{
5959 if (security_ismaclabel(key))
5960 return nfs4_set_security_label(dentry, buf, buflen);
5961
5962 return -EOPNOTSUPP;
5963}
5964
5965static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5966 void *buf, size_t buflen, int type)
5967{
5968 if (security_ismaclabel(key))
5969 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5970 return -EOPNOTSUPP;
5971}
5972
5973static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5974 size_t list_len, const char *name,
5975 size_t name_len, int type)
5976{
5977 size_t len = 0;
5978
5979 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5980 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5981 if (list && len <= list_len)
5982 security_inode_listsecurity(dentry->d_inode, list, len);
5983 }
5984 return len;
5985}
5986
5987static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5988 .prefix = XATTR_SECURITY_PREFIX,
5989 .list = nfs4_xattr_list_nfs4_label,
5990 .get = nfs4_xattr_get_nfs4_label,
5991 .set = nfs4_xattr_set_nfs4_label,
5992};
5993#endif
5994
5995
533eb461
AA		 5996/*
5997 * nfs_fhget will use either the mounted_on_fileid or the fileid
5998 */
69aaaae1
TM		 5999static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6000{
533eb461
AA		 6001 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6002 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6003 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6004 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6005 return;
6006
6007 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6008 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6009 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6010 fattr->nlink = 2;
6011}
6012
f05d147f
BS		 6013static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6014 const struct qstr *name,
6015 struct nfs4_fs_locations *fs_locations,
6016 struct page *page)
683b57b4
TM		 6017{
6018 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6019 u32 bitmask[3] = {
361e624f 6020 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6021 };
6022 struct nfs4_fs_locations_arg args = {
6023 .dir_fh = NFS_FH(dir),
c228fd3a 6024 .name = name,
683b57b4
TM		 6025 .page = page,
6026 .bitmask = bitmask,
6027 };
22958463
BH		 6028 struct nfs4_fs_locations_res res = {
6029 .fs_locations = fs_locations,
6030 };
683b57b4
TM		 6031 struct rpc_message msg = {
6032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6033 .rpc_argp = &args,
22958463 6034 .rpc_resp = &res,
683b57b4
TM		 6035 };
6036 int status;
6037
3110ff80 6038 dprintk("%s: start\n", __func__);
533eb461
AA		 6039
6040 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6041 * is not supported */
6042 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6043 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6044 else
6045 bitmask[0] |= FATTR4_WORD0_FILEID;
6046
c228fd3a 6047 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6048 fs_locations->server = server;
830b8e33 6049 fs_locations->nlocations = 0;
f05d147f 6050 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6051 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6052 return status;
6053}
6054
f05d147f
BS		 6055int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6056 const struct qstr *name,
6057 struct nfs4_fs_locations *fs_locations,
6058 struct page *page)
db0a9593
BS		 6059{
6060 struct nfs4_exception exception = { };
6061 int err;
6062 do {
078ea3df
TM		 6063 err = _nfs4_proc_fs_locations(client, dir, name,
6064 fs_locations, page);
6065 trace_nfs4_get_fs_locations(dir, name, err);
6066 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6067 &exception);
6068 } while (exception.retry);
6069 return err;
6070}
6071
b03d735b
CL		 6072/*
6073 * This operation also signals the server that this client is
6074 * performing migration recovery. The server can stop returning
6075 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6076 * appended to this compound to identify the client ID which is
6077 * performing recovery.
6078 */
6079static int _nfs40_proc_get_locations(struct inode *inode,
6080 struct nfs4_fs_locations *locations,
6081 struct page *page, struct rpc_cred *cred)
6082{
6083 struct nfs_server *server = NFS_SERVER(inode);
6084 struct rpc_clnt *clnt = server->client;
6085 u32 bitmask[2] = {
6086 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6087 };
6088 struct nfs4_fs_locations_arg args = {
6089 .clientid = server->nfs_client->cl_clientid,
6090 .fh = NFS_FH(inode),
6091 .page = page,
6092 .bitmask = bitmask,
6093 .migration = 1, /* skip LOOKUP */
6094 .renew = 1, /* append RENEW */
6095 };
6096 struct nfs4_fs_locations_res res = {
6097 .fs_locations = locations,
6098 .migration = 1,
6099 .renew = 1,
6100 };
6101 struct rpc_message msg = {
6102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6103 .rpc_argp = &args,
6104 .rpc_resp = &res,
6105 .rpc_cred = cred,
6106 };
6107 unsigned long now = jiffies;
6108 int status;
6109
6110 nfs_fattr_init(&locations->fattr);
6111 locations->server = server;
6112 locations->nlocations = 0;
6113
6114 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6115 nfs4_set_sequence_privileged(&args.seq_args);
6116 status = nfs4_call_sync_sequence(clnt, server, &msg,
6117 &args.seq_args, &res.seq_res);
6118 if (status)
6119 return status;
6120
6121 renew_lease(server, now);
6122 return 0;
6123}
6124
6125#ifdef CONFIG_NFS_V4_1
6126
6127/*
6128 * This operation also signals the server that this client is
6129 * performing migration recovery. The server can stop asserting
6130 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6131 * performing this operation is identified in the SEQUENCE
6132 * operation in this compound.
6133 *
6134 * When the client supports GETATTR(fs_locations_info), it can
6135 * be plumbed in here.
6136 */
6137static int _nfs41_proc_get_locations(struct inode *inode,
6138 struct nfs4_fs_locations *locations,
6139 struct page *page, struct rpc_cred *cred)
6140{
6141 struct nfs_server *server = NFS_SERVER(inode);
6142 struct rpc_clnt *clnt = server->client;
6143 u32 bitmask[2] = {
6144 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6145 };
6146 struct nfs4_fs_locations_arg args = {
6147 .fh = NFS_FH(inode),
6148 .page = page,
6149 .bitmask = bitmask,
6150 .migration = 1, /* skip LOOKUP */
6151 };
6152 struct nfs4_fs_locations_res res = {
6153 .fs_locations = locations,
6154 .migration = 1,
6155 };
6156 struct rpc_message msg = {
6157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6158 .rpc_argp = &args,
6159 .rpc_resp = &res,
6160 .rpc_cred = cred,
6161 };
6162 int status;
6163
6164 nfs_fattr_init(&locations->fattr);
6165 locations->server = server;
6166 locations->nlocations = 0;
6167
6168 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6169 nfs4_set_sequence_privileged(&args.seq_args);
6170 status = nfs4_call_sync_sequence(clnt, server, &msg,
6171 &args.seq_args, &res.seq_res);
6172 if (status == NFS4_OK &&
6173 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6174 status = -NFS4ERR_LEASE_MOVED;
6175 return status;
6176}
6177
6178#endif /* CONFIG_NFS_V4_1 */
6179
6180/**
6181 * nfs4_proc_get_locations - discover locations for a migrated FSID
6182 * @inode: inode on FSID that is migrating
6183 * @locations: result of query
6184 * @page: buffer
6185 * @cred: credential to use for this operation
6186 *
6187 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6188 * operation failed, or a negative errno if a local error occurred.
6189 *
6190 * On success, "locations" is filled in, but if the server has
6191 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6192 * asserted.
6193 *
6194 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6195 * from this client that require migration recovery.
6196 */
6197int nfs4_proc_get_locations(struct inode *inode,
6198 struct nfs4_fs_locations *locations,
6199 struct page *page, struct rpc_cred *cred)
6200{
6201 struct nfs_server *server = NFS_SERVER(inode);
6202 struct nfs_client *clp = server->nfs_client;
6203 const struct nfs4_mig_recovery_ops *ops =
6204 clp->cl_mvops->mig_recovery_ops;
6205 struct nfs4_exception exception = { };
6206 int status;
6207
6208 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6209 (unsigned long long)server->fsid.major,
6210 (unsigned long long)server->fsid.minor,
6211 clp->cl_hostname);
6212 nfs_display_fhandle(NFS_FH(inode), __func__);
6213
6214 do {
6215 status = ops->get_locations(inode, locations, page, cred);
6216 if (status != -NFS4ERR_DELAY)
6217 break;
6218 nfs4_handle_exception(server, status, &exception);
6219 } while (exception.retry);
6220 return status;
6221}
6222
44c99933
CL		 6223/*
6224 * This operation also signals the server that this client is
6225 * performing "lease moved" recovery. The server can stop
6226 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6227 * is appended to this compound to identify the client ID which is
6228 * performing recovery.
6229 */
6230static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6231{
6232 struct nfs_server *server = NFS_SERVER(inode);
6233 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6234 struct rpc_clnt *clnt = server->client;
6235 struct nfs4_fsid_present_arg args = {
6236 .fh = NFS_FH(inode),
6237 .clientid = clp->cl_clientid,
6238 .renew = 1, /* append RENEW */
6239 };
6240 struct nfs4_fsid_present_res res = {
6241 .renew = 1,
6242 };
6243 struct rpc_message msg = {
6244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6245 .rpc_argp = &args,
6246 .rpc_resp = &res,
6247 .rpc_cred = cred,
6248 };
6249 unsigned long now = jiffies;
6250 int status;
6251
6252 res.fh = nfs_alloc_fhandle();
6253 if (res.fh == NULL)
6254 return -ENOMEM;
6255
6256 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6257 nfs4_set_sequence_privileged(&args.seq_args);
6258 status = nfs4_call_sync_sequence(clnt, server, &msg,
6259 &args.seq_args, &res.seq_res);
6260 nfs_free_fhandle(res.fh);
6261 if (status)
6262 return status;
6263
6264 do_renew_lease(clp, now);
6265 return 0;
6266}
6267
6268#ifdef CONFIG_NFS_V4_1
6269
6270/*
6271 * This operation also signals the server that this client is
6272 * performing "lease moved" recovery. The server can stop asserting
6273 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6274 * this operation is identified in the SEQUENCE operation in this
6275 * compound.
6276 */
6277static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6278{
6279 struct nfs_server *server = NFS_SERVER(inode);
6280 struct rpc_clnt *clnt = server->client;
6281 struct nfs4_fsid_present_arg args = {
6282 .fh = NFS_FH(inode),
6283 };
6284 struct nfs4_fsid_present_res res = {
6285 };
6286 struct rpc_message msg = {
6287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6288 .rpc_argp = &args,
6289 .rpc_resp = &res,
6290 .rpc_cred = cred,
6291 };
6292 int status;
6293
6294 res.fh = nfs_alloc_fhandle();
6295 if (res.fh == NULL)
6296 return -ENOMEM;
6297
6298 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6299 nfs4_set_sequence_privileged(&args.seq_args);
6300 status = nfs4_call_sync_sequence(clnt, server, &msg,
6301 &args.seq_args, &res.seq_res);
6302 nfs_free_fhandle(res.fh);
6303 if (status == NFS4_OK &&
6304 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6305 status = -NFS4ERR_LEASE_MOVED;
6306 return status;
6307}
6308
6309#endif /* CONFIG_NFS_V4_1 */
6310
6311/**
6312 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6313 * @inode: inode on FSID to check
6314 * @cred: credential to use for this operation
6315 *
6316 * Server indicates whether the FSID is present, moved, or not
6317 * recognized. This operation is necessary to clear a LEASE_MOVED
6318 * condition for this client ID.
6319 *
6320 * Returns NFS4_OK if the FSID is present on this server,
6321 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6322 * NFS4ERR code if some error occurred on the server, or a
6323 * negative errno if a local failure occurred.
6324 */
6325int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6326{
6327 struct nfs_server *server = NFS_SERVER(inode);
6328 struct nfs_client *clp = server->nfs_client;
6329 const struct nfs4_mig_recovery_ops *ops =
6330 clp->cl_mvops->mig_recovery_ops;
6331 struct nfs4_exception exception = { };
6332 int status;
6333
6334 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6335 (unsigned long long)server->fsid.major,
6336 (unsigned long long)server->fsid.minor,
6337 clp->cl_hostname);
6338 nfs_display_fhandle(NFS_FH(inode), __func__);
6339
6340 do {
6341 status = ops->fsid_present(inode, cred);
6342 if (status != -NFS4ERR_DELAY)
6343 break;
6344 nfs4_handle_exception(server, status, &exception);
6345 } while (exception.retry);
6346 return status;
6347}
6348
5ec16a85 6349/**
a5250def
WAA		 6350 * If 'use_integrity' is true and the state managment nfs_client
6351 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6352 * and the machine credential as per RFC3530bis and RFC5661 Security
6353 * Considerations sections. Otherwise, just use the user cred with the
6354 * filesystem's rpc_client.
5ec16a85 6355 */
a5250def 6356static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6357{
6358 int status;
6359 struct nfs4_secinfo_arg args = {
6360 .dir_fh = NFS_FH(dir),
6361 .name = name,
6362 };
6363 struct nfs4_secinfo_res res = {
6364 .flavors = flavors,
6365 };
6366 struct rpc_message msg = {
6367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6368 .rpc_argp = &args,
6369 .rpc_resp = &res,
6370 };
a5250def 6371 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6372 struct rpc_cred *cred = NULL;
a5250def
WAA		 6373
6374 if (use_integrity) {
6375 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6376 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6377 msg.rpc_cred = cred;
a5250def 6378 }
5a5ea0d4
BS		 6379
6380 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6381
6382 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6383 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6384
a5250def
WAA		 6385 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6386 &res.seq_res, 0);
5a5ea0d4 6387 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6388
7cb852df
WAA		 6389 if (cred)
6390 put_rpccred(cred);
a5250def 6391
5a5ea0d4
BS		 6392 return status;
6393}
6394
72de53ec
BS		 6395int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6396 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6397{
6398 struct nfs4_exception exception = { };
6399 int err;
6400 do {
a5250def
WAA		 6401 err = -NFS4ERR_WRONGSEC;
6402
6403 /* try to use integrity protection with machine cred */
6404 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6405 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6406
6407 /*
6408 * if unable to use integrity protection, or SECINFO with
6409 * integrity protection returns NFS4ERR_WRONGSEC (which is
6410 * disallowed by spec, but exists in deployed servers) use
6411 * the current filesystem's rpc_client and the user cred.
6412 */
6413 if (err == -NFS4ERR_WRONGSEC)
6414 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6415
078ea3df
TM		 6416 trace_nfs4_secinfo(dir, name, err);
6417 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6418 &exception);
6419 } while (exception.retry);
6420 return err;
6421}
6422
557134a3 6423#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6424/*
6425 * Check the exchange flags returned by the server for invalid flags, having
6426 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6427 * DS flags set.
6428 */
6429static int nfs4_check_cl_exchange_flags(u32 flags)
6430{
6431 if (flags & ~EXCHGID4_FLAG_MASK_R)
6432 goto out_inval;
6433 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6434 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6435 goto out_inval;
6436 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6437 goto out_inval;
6438 return NFS_OK;
6439out_inval:
6440 return -NFS4ERR_INVAL;
6441}
6442
78fe0f41 6443static bool
79d4e1f0
CL		 6444nfs41_same_server_scope(struct nfs41_server_scope *a,
6445 struct nfs41_server_scope *b)
78fe0f41
WAA		 6446{
6447 if (a->server_scope_sz == b->server_scope_sz &&
6448 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6449 return true;
6450
6451 return false;
6452}
6453
7c44f1ae
WAA		 6454/*
6455 * nfs4_proc_bind_conn_to_session()
6456 *
6457 * The 4.1 client currently uses the same TCP connection for the
6458 * fore and backchannel.
6459 */
2cf047c9 6460int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6461{
6462 int status;
6463 struct nfs41_bind_conn_to_session_res res;
6464 struct rpc_message msg = {
6465 .rpc_proc =
6466 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6467 .rpc_argp = clp,
6468 .rpc_resp = &res,
2cf047c9 6469 .rpc_cred = cred,
7c44f1ae
WAA		 6470 };
6471
6472 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6473
6474 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6475 if (unlikely(res.session == NULL)) {
6476 status = -ENOMEM;
6477 goto out;
6478 }
6479
6480 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6481 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6482 if (status == 0) {
6483 if (memcmp(res.session->sess_id.data,
6484 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6485 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6486 status = -EIO;
6487 goto out_session;
6488 }
6489 if (res.dir != NFS4_CDFS4_BOTH) {
6490 dprintk("NFS: %s: Unexpected direction from server\n",
6491 __func__);
6492 status = -EIO;
6493 goto out_session;
6494 }
6495 if (res.use_conn_in_rdma_mode) {
6496 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6497 __func__);
6498 status = -EIO;
6499 goto out_session;
6500 }
6501 }
6502out_session:
6503 kfree(res.session);
6504out:
6505 dprintk("<-- %s status= %d\n", __func__, status);
6506 return status;
6507}
6508
99fe60d0 6509/*
fa940720
WAA		 6510 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6511 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6512 */
6513static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6514 .how = SP4_MACH_CRED,
6515 .enforce.u.words = {
6516 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6517 1 << (OP_EXCHANGE_ID - 32) |
6518 1 << (OP_CREATE_SESSION - 32) |
6519 1 << (OP_DESTROY_SESSION - 32) |
6520 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6521 },
6522 .allow.u.words = {
6523 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6524 1 << (OP_LOCKU) |
6525 1 << (OP_COMMIT),
8b5bee2e 6526 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6527 1 << (OP_SECINFO_NO_NAME - 32) |
6528 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6529 1 << (OP_FREE_STATEID - 32) |
6530 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6531 }
6532};
6533
6534/*
6535 * Select the state protection mode for client `clp' given the server results
6536 * from exchange_id in `sp'.
99fe60d0 6537 *
2031cd1a
WAA		 6538 * Returns 0 on success, negative errno otherwise.
6539 */
6540static int nfs4_sp4_select_mode(struct nfs_client *clp,
6541 struct nfs41_state_protection *sp)
6542{
6543 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6544 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6545 1 << (OP_EXCHANGE_ID - 32) |
6546 1 << (OP_CREATE_SESSION - 32) |
6547 1 << (OP_DESTROY_SESSION - 32) |
6548 1 << (OP_DESTROY_CLIENTID - 32)
6549 };
6550 unsigned int i;
6551
6552 if (sp->how == SP4_MACH_CRED) {
6553 /* Print state protect result */
6554 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6555 for (i = 0; i <= LAST_NFS4_OP; i++) {
6556 if (test_bit(i, sp->enforce.u.longs))
6557 dfprintk(MOUNT, " enforce op %d\n", i);
6558 if (test_bit(i, sp->allow.u.longs))
6559 dfprintk(MOUNT, " allow op %d\n", i);
6560 }
6561
6562 /* make sure nothing is on enforce list that isn't supported */
6563 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6564 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6565 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6566 return -EINVAL;
6567 }
6568 }
6569
6570 /*
6571 * Minimal mode - state operations are allowed to use machine
6572 * credential. Note this already happens by default, so the
6573 * client doesn't have to do anything more than the negotiation.
6574 *
6575 * NOTE: we don't care if EXCHANGE_ID is in the list -
6576 * we're already using the machine cred for exchange_id
6577 * and will never use a different cred.
6578 */
6579 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6580 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6581 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6582 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6583 dfprintk(MOUNT, "sp4_mach_cred:\n");
6584 dfprintk(MOUNT, " minimal mode enabled\n");
6585 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6586 } else {
6587 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6588 return -EINVAL;
6589 }
fa940720
WAA		 6590
6591 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6592 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6593 dfprintk(MOUNT, " cleanup mode enabled\n");
6594 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6595 }
8b5bee2e
WAA		 6596
6597 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6598 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6599 dfprintk(MOUNT, " secinfo mode enabled\n");
6600 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6601 }
3787d506
WAA		 6602
6603 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6604 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6605 dfprintk(MOUNT, " stateid mode enabled\n");
6606 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6607 }
8c21c62c
WAA		 6608
6609 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6610 dfprintk(MOUNT, " write mode enabled\n");
6611 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6612 }
6613
6614 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6615 dfprintk(MOUNT, " commit mode enabled\n");
6616 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6617 }
2031cd1a
WAA		 6618 }
6619
6620 return 0;
6621}
6622
6623/*
6624 * _nfs4_proc_exchange_id()
6bbb4ae8 6625 *
2031cd1a 6626 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6627 */
2031cd1a
WAA		 6628static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6629 u32 sp4_how)
99fe60d0
BH		 6630{
6631 nfs4_verifier verifier;
6632 struct nfs41_exchange_id_args args = {
cd93710e 6633 .verifier = &verifier,
99fe60d0 6634 .client = clp,
cd3fadec 6635#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6636 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6637 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6638 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6639#else
6640 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6641 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6642#endif
99fe60d0
BH		 6643 };
6644 struct nfs41_exchange_id_res res = {
32b01310 6645 0
99fe60d0
BH		 6646 };
6647 int status;
6648 struct rpc_message msg = {
6649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6650 .rpc_argp = &args,
6651 .rpc_resp = &res,
6652 .rpc_cred = cred,
6653 };
99fe60d0 6654
f092075d 6655 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6656 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6657 sizeof(args.id));
6bbb4ae8
CL		 6658 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6659 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6660 args.id_len, args.id);
99fe60d0 6661
acdeb69d 6662 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6663 GFP_NOFS);
acdeb69d 6664 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6665 status = -ENOMEM;
6666 goto out;
6667 }
78fe0f41 6668
79d4e1f0 6669 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6670 GFP_NOFS);
177313f1 6671 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6672 status = -ENOMEM;
acdeb69d 6673 goto out_server_owner;
abe9a6d5 6674 }
78fe0f41 6675
bbafffd2 6676 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6677 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6678 status = -ENOMEM;
6679 goto out_server_scope;
6680 }
6681
2031cd1a
WAA		 6682 switch (sp4_how) {
6683 case SP4_NONE:
6684 args.state_protect.how = SP4_NONE;
6685 break;
6686
6687 case SP4_MACH_CRED:
6688 args.state_protect = nfs4_sp4_mach_cred_request;
6689 break;
6690
6691 default:
6692 /* unsupported! */
6693 WARN_ON_ONCE(1);
6694 status = -EINVAL;
6695 goto out_server_scope;
6696 }
6697
1bd714f2 6698 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6699 trace_nfs4_exchange_id(clp, status);
177313f1 6700 if (status == 0)
32b01310 6701 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6702
2031cd1a
WAA		 6703 if (status == 0)
6704 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6705
acdeb69d 6706 if (status == 0) {
32b01310
TM		 6707 clp->cl_clientid = res.clientid;
6708 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6709 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6710 clp->cl_seqid = res.seqid;
6711
acdeb69d
CL		 6712 kfree(clp->cl_serverowner);
6713 clp->cl_serverowner = res.server_owner;
6714 res.server_owner = NULL;
78fe0f41 6715
7d2ed9ac 6716 /* use the most recent implementation id */
59155546
CL		 6717 kfree(clp->cl_implid);
6718 clp->cl_implid = res.impl_id;
7d2ed9ac 6719
177313f1 6720 if (clp->cl_serverscope != NULL &&
79d4e1f0 6721 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6722 res.server_scope)) {
6723 dprintk("%s: server_scope mismatch detected\n",
6724 __func__);
6725 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6726 kfree(clp->cl_serverscope);
6727 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6728 }
6729
177313f1 6730 if (clp->cl_serverscope == NULL) {
79d4e1f0 6731 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6732 goto out;
6733 }
32b01310
TM		 6734 } else
6735 kfree(res.impl_id);
7d2ed9ac 6736
acdeb69d
CL		 6737out_server_owner:
6738 kfree(res.server_owner);
7d2ed9ac 6739out_server_scope:
abe9a6d5
WAA		 6740 kfree(res.server_scope);
6741out:
177313f1 6742 if (clp->cl_implid != NULL)
6bbb4ae8 6743 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6744 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6745 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6746 clp->cl_implid->date.seconds,
6747 clp->cl_implid->date.nseconds);
6bbb4ae8 6748 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6749 return status;
6750}
6751
2031cd1a
WAA		 6752/*
6753 * nfs4_proc_exchange_id()
6754 *
6755 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6756 *
6757 * Since the clientid has expired, all compounds using sessions
6758 * associated with the stale clientid will be returning
6759 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6760 * be in some phase of session reset.
6761 *
6762 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6763 */
6764int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6765{
6766 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6767 int status;
6768
6769 /* try SP4_MACH_CRED if krb5i/p */
6770 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6771 authflavor == RPC_AUTH_GSS_KRB5P) {
6772 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6773 if (!status)
6774 return 0;
6775 }
6776
6777 /* try SP4_NONE */
6778 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6779}
6780
66245539
TM		 6781static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6782 struct rpc_cred *cred)
6783{
6784 struct rpc_message msg = {
6785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6786 .rpc_argp = clp,
6787 .rpc_cred = cred,
6788 };
6789 int status;
6790
6791 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6792 trace_nfs4_destroy_clientid(clp, status);
66245539 6793 if (status)
02c67525 6794 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6795 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6796 return status;
6797}
6798
6799static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6800 struct rpc_cred *cred)
6801{
6802 unsigned int loop;
6803 int ret;
6804
6805 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6806 ret = _nfs4_proc_destroy_clientid(clp, cred);
6807 switch (ret) {
6808 case -NFS4ERR_DELAY:
6809 case -NFS4ERR_CLIENTID_BUSY:
6810 ssleep(1);
6811 break;
6812 default:
6813 return ret;
6814 }
6815 }
6816 return 0;
6817}
6818
6819int nfs4_destroy_clientid(struct nfs_client *clp)
6820{
6821 struct rpc_cred *cred;
6822 int ret = 0;
6823
6824 if (clp->cl_mvops->minor_version < 1)
6825 goto out;
6826 if (clp->cl_exchange_flags == 0)
6827 goto out;
05f4c350
CL		 6828 if (clp->cl_preserve_clid)
6829 goto out;
73d8bde5 6830 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6831 ret = nfs4_proc_destroy_clientid(clp, cred);
6832 if (cred)
6833 put_rpccred(cred);
6834 switch (ret) {
6835 case 0:
6836 case -NFS4ERR_STALE_CLIENTID:
6837 clp->cl_exchange_flags = 0;
6838 }
6839out:
6840 return ret;
6841}
6842
2050f0cc
AA		 6843struct nfs4_get_lease_time_data {
6844 struct nfs4_get_lease_time_args *args;
6845 struct nfs4_get_lease_time_res *res;
6846 struct nfs_client *clp;
6847};
6848
6849static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6850 void *calldata)
6851{
2050f0cc
AA		 6852 struct nfs4_get_lease_time_data *data =
6853 (struct nfs4_get_lease_time_data *)calldata;
6854
6855 dprintk("--> %s\n", __func__);
6856 /* just setup sequence, do not trigger session recovery
6857 since we're invoked within one */
d9afbd1b
TM		 6858 nfs41_setup_sequence(data->clp->cl_session,
6859 &data->args->la_seq_args,
6860 &data->res->lr_seq_res,
6861 task);
2050f0cc
AA		 6862 dprintk("<-- %s\n", __func__);
6863}
6864
6865/*
6866 * Called from nfs4_state_manager thread for session setup, so don't recover
6867 * from sequence operation or clientid errors.
6868 */
6869static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6870{
6871 struct nfs4_get_lease_time_data *data =
6872 (struct nfs4_get_lease_time_data *)calldata;
6873
6874 dprintk("--> %s\n", __func__);
14516c3a
TM		 6875 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6876 return;
2050f0cc
AA		 6877 switch (task->tk_status) {
6878 case -NFS4ERR_DELAY:
6879 case -NFS4ERR_GRACE:
6880 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6881 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6882 task->tk_status = 0;
a8a4ae3a
AA		 6883 /* fall through */
6884 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6885 rpc_restart_call_prepare(task);
2050f0cc
AA		 6886 return;
6887 }
2050f0cc
AA		 6888 dprintk("<-- %s\n", __func__);
6889}
6890
17280175 6891static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6892 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6893 .rpc_call_done = nfs4_get_lease_time_done,
6894};
6895
6896int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6897{
6898 struct rpc_task *task;
6899 struct nfs4_get_lease_time_args args;
6900 struct nfs4_get_lease_time_res res = {
6901 .lr_fsinfo = fsinfo,
6902 };
6903 struct nfs4_get_lease_time_data data = {
6904 .args = &args,
6905 .res = &res,
6906 .clp = clp,
6907 };
6908 struct rpc_message msg = {
6909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6910 .rpc_argp = &args,
6911 .rpc_resp = &res,
6912 };
6913 struct rpc_task_setup task_setup = {
6914 .rpc_client = clp->cl_rpcclient,
6915 .rpc_message = &msg,
6916 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6917 .callback_data = &data,
6918 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6919 };
6920 int status;
6921
a9c92d6b 6922 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6923 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6924 dprintk("--> %s\n", __func__);
6925 task = rpc_run_task(&task_setup);
6926
6927 if (IS_ERR(task))
6928 status = PTR_ERR(task);
6929 else {
6930 status = task->tk_status;
6931 rpc_put_task(task);
6932 }
6933 dprintk("<-- %s return %d\n", __func__, status);
6934
6935 return status;
6936}
6937
fc931582
AA		 6938/*
6939 * Initialize the values to be used by the client in CREATE_SESSION
6940 * If nfs4_init_session set the fore channel request and response sizes,
6941 * use them.
6942 *
6943 * Set the back channel max_resp_sz_cached to zero to force the client to
6944 * always set csa_cachethis to FALSE because the current implementation
6945 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6946 */
6947static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6948{
18aad3d5
AA		 6949 unsigned int max_rqst_sz, max_resp_sz;
6950
6951 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6952 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6953
fc931582 6954 /* Fore channel attributes */
18aad3d5
AA		 6955 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6956 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6957 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6958 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6959
6960 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6961 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6962 __func__,
6963 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6964 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6965
6966 /* Back channel attributes */
fc931582
AA		 6967 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6968 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6969 args->bc_attrs.max_resp_sz_cached = 0;
6970 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6971 args->bc_attrs.max_reqs = 1;
6972
6973 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6974 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6975 __func__,
6976 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6977 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6978 args->bc_attrs.max_reqs);
6979}
6980
43c2e885 6981static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6982{
43c2e885
BF		 6983 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6984 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6985
43c2e885
BF		 6986 if (rcvd->max_resp_sz > sent->max_resp_sz)
6987 return -EINVAL;
6988 /*
6989 * Our requested max_ops is the minimum we need; we're not
6990 * prepared to break up compounds into smaller pieces than that.
6991 * So, no point even trying to continue if the server won't
6992 * cooperate:
6993 */
6994 if (rcvd->max_ops < sent->max_ops)
6995 return -EINVAL;
6996 if (rcvd->max_reqs == 0)
6997 return -EINVAL;
b4b9a0c1
VG		 6998 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6999 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7000 return 0;
8d35301d
AA		 7001}
7002
43c2e885
BF		 7003static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7004{
7005 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7006 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7007
43c2e885
BF		 7008 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7009 return -EINVAL;
7010 if (rcvd->max_resp_sz < sent->max_resp_sz)
7011 return -EINVAL;
7012 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7013 return -EINVAL;
7014 /* These would render the backchannel useless: */
b4b9a0c1 7015 if (rcvd->max_ops != sent->max_ops)
43c2e885 7016 return -EINVAL;
b4b9a0c1 7017 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7018 return -EINVAL;
7019 return 0;
7020}
8d35301d 7021
8d35301d
AA		 7022static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7023 struct nfs4_session *session)
7024{
43c2e885 7025 int ret;
8d35301d 7026
43c2e885
BF		 7027 ret = nfs4_verify_fore_channel_attrs(args, session);
7028 if (ret)
7029 return ret;
7030 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7031}
7032
848f5bda
TM		 7033static int _nfs4_proc_create_session(struct nfs_client *clp,
7034 struct rpc_cred *cred)
fc931582
AA		 7035{
7036 struct nfs4_session *session = clp->cl_session;
7037 struct nfs41_create_session_args args = {
7038 .client = clp,
7039 .cb_program = NFS4_CALLBACK,
7040 };
7041 struct nfs41_create_session_res res = {
7042 .client = clp,
7043 };
7044 struct rpc_message msg = {
7045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7046 .rpc_argp = &args,
7047 .rpc_resp = &res,
848f5bda 7048 .rpc_cred = cred,
fc931582
AA		 7049 };
7050 int status;
7051
7052 nfs4_init_channel_attrs(&args);
0f91421e 7053 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7054
1bd714f2 7055 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7056 trace_nfs4_create_session(clp, status);
fc931582 7057
43095d39 7058 if (!status) {
8d35301d
AA		 7059 /* Verify the session's negotiated channel_attrs values */
7060 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7061 /* Increment the clientid slot sequence id */
7062 clp->cl_seqid++;
7063 }
7064
7065 return status;
7066}
7067
7068/*
7069 * Issues a CREATE_SESSION operation to the server.
7070 * It is the responsibility of the caller to verify the session is
7071 * expired before calling this routine.
7072 */
848f5bda 7073int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7074{
7075 int status;
7076 unsigned *ptr;
fc931582
AA		 7077 struct nfs4_session *session = clp->cl_session;
7078
7079 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7080
848f5bda 7081 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7082 if (status)
7083 goto out;
7084
aacd5537
AA		 7085 /* Init or reset the session slot tables */
7086 status = nfs4_setup_session_slot_tables(session);
7087 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7088 if (status)
7089 goto out;
7090
7091 ptr = (unsigned *)&session->sess_id.data[0];
7092 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7093 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7094out:
7095 dprintk("<-- %s\n", __func__);
7096 return status;
7097}
7098
0f3e66c6
AA		 7099/*
7100 * Issue the over-the-wire RPC DESTROY_SESSION.
7101 * The caller must serialize access to this routine.
7102 */
848f5bda
TM		 7103int nfs4_proc_destroy_session(struct nfs4_session *session,
7104 struct rpc_cred *cred)
0f3e66c6 7105{
848f5bda
TM		 7106 struct rpc_message msg = {
7107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7108 .rpc_argp = session,
7109 .rpc_cred = cred,
7110 };
0f3e66c6 7111 int status = 0;
0f3e66c6
AA		 7112
7113 dprintk("--> nfs4_proc_destroy_session\n");
7114
7115 /* session is still being setup */
7116 if (session->clp->cl_cons_state != NFS_CS_READY)
7117 return status;
7118
1bd714f2 7119 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7120 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7121
7122 if (status)
08106ac7 7123 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7124 "Session has been destroyed regardless...\n", status);
7125
7126 dprintk("<-- nfs4_proc_destroy_session\n");
7127 return status;
7128}
7129
fc01cea9
AA		 7130/*
7131 * Renew the cl_session lease.
7132 */
d5f8d3fe
TM		 7133struct nfs4_sequence_data {
7134 struct nfs_client *clp;
7135 struct nfs4_sequence_args args;
7136 struct nfs4_sequence_res res;
7137};
7138
dc96aef9
AB		 7139static void nfs41_sequence_release(void *data)
7140{
d5f8d3fe
TM		 7141 struct nfs4_sequence_data *calldata = data;
7142 struct nfs_client *clp = calldata->clp;
dc96aef9 7143
7135840f
AB		 7144 if (atomic_read(&clp->cl_count) > 1)
7145 nfs4_schedule_state_renewal(clp);
7146 nfs_put_client(clp);
d5f8d3fe 7147 kfree(calldata);
dc96aef9
AB		 7148}
7149
aa5190d0
TM		 7150static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7151{
7152 switch(task->tk_status) {
7153 case -NFS4ERR_DELAY:
aa5190d0
TM		 7154 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7155 return -EAGAIN;
7156 default:
0400a6b0 7157 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7158 }
7159 return 0;
7160}
7161
dc96aef9 7162static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7163{
d5f8d3fe
TM		 7164 struct nfs4_sequence_data *calldata = data;
7165 struct nfs_client *clp = calldata->clp;
fc01cea9 7166
14516c3a
TM		 7167 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7168 return;
fc01cea9 7169
c6d01c6f 7170 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7171 if (task->tk_status < 0) {
7172 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7173 if (atomic_read(&clp->cl_count) == 1)
7174 goto out;
fc01cea9 7175
aa5190d0
TM		 7176 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7177 rpc_restart_call_prepare(task);
fc01cea9
AA		 7178 return;
7179 }
7180 }
fc01cea9 7181 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7182out:
fc01cea9
AA		 7183 dprintk("<-- %s\n", __func__);
7184}
7185
7186static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7187{
d5f8d3fe
TM		 7188 struct nfs4_sequence_data *calldata = data;
7189 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7190 struct nfs4_sequence_args *args;
7191 struct nfs4_sequence_res *res;
7192
fc01cea9
AA		 7193 args = task->tk_msg.rpc_argp;
7194 res = task->tk_msg.rpc_resp;
7195
d9afbd1b 7196 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7197}
7198
7199static const struct rpc_call_ops nfs41_sequence_ops = {
7200 .rpc_call_done = nfs41_sequence_call_done,
7201 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7202 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7203};
7204
8fe72bac
TM		 7205static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7206 struct rpc_cred *cred,
7207 bool is_privileged)
fc01cea9 7208{
d5f8d3fe 7209 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7210 struct rpc_message msg = {
7211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7212 .rpc_cred = cred,
7213 };
71ac6da9
TM		 7214 struct rpc_task_setup task_setup_data = {
7215 .rpc_client = clp->cl_rpcclient,
7216 .rpc_message = &msg,
8fe72bac 7217 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7218 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7219 };
fc01cea9 7220
7135840f 7221 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7222 return ERR_PTR(-EIO);
dfb4f309 7223 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7224 if (calldata == NULL) {
7135840f 7225 nfs_put_client(clp);
71ac6da9 7226 return ERR_PTR(-ENOMEM);
fc01cea9 7227 }
a9c92d6b 7228 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7229 if (is_privileged)
7230 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7231 msg.rpc_argp = &calldata->args;
7232 msg.rpc_resp = &calldata->res;
7233 calldata->clp = clp;
71ac6da9 7234 task_setup_data.callback_data = calldata;
fc01cea9 7235
71ac6da9
TM		 7236 return rpc_run_task(&task_setup_data);
7237}
7238
2f60ea6b 7239static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7240{
7241 struct rpc_task *task;
7242 int ret = 0;
7243
2f60ea6b
TM		 7244 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7245 return 0;
8fe72bac 7246 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7247 if (IS_ERR(task))
7248 ret = PTR_ERR(task);
7249 else
bf294b41 7250 rpc_put_task_async(task);
71ac6da9
TM		 7251 dprintk("<-- %s status=%d\n", __func__, ret);
7252 return ret;
7253}
7254
7255static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7256{
7257 struct rpc_task *task;
7258 int ret;
7259
8fe72bac 7260 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7261 if (IS_ERR(task)) {
7262 ret = PTR_ERR(task);
7263 goto out;
7264 }
7265 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7266 if (!ret) {
7267 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7268
7269 if (task->tk_status == 0)
7270 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7271 ret = task->tk_status;
b4410c2f 7272 }
71ac6da9
TM		 7273 rpc_put_task(task);
7274out:
7275 dprintk("<-- %s status=%d\n", __func__, ret);
7276 return ret;
fc01cea9
AA		 7277}
7278
fce5c838
RL		 7279struct nfs4_reclaim_complete_data {
7280 struct nfs_client *clp;
7281 struct nfs41_reclaim_complete_args arg;
7282 struct nfs41_reclaim_complete_res res;
7283};
7284
7285static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7286{
7287 struct nfs4_reclaim_complete_data *calldata = data;
7288
d9afbd1b
TM		 7289 nfs41_setup_sequence(calldata->clp->cl_session,
7290 &calldata->arg.seq_args,
7291 &calldata->res.seq_res,
7292 task);
fce5c838
RL		 7293}
7294
aa5190d0
TM		 7295static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7296{
7297 switch(task->tk_status) {
7298 case 0:
7299 case -NFS4ERR_COMPLETE_ALREADY:
7300 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7301 break;
7302 case -NFS4ERR_DELAY:
aa5190d0 7303 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7304 /* fall through */
7305 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7306 return -EAGAIN;
7307 default:
0400a6b0 7308 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7309 }
7310 return 0;
7311}
7312
fce5c838
RL		 7313static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7314{
7315 struct nfs4_reclaim_complete_data *calldata = data;
7316 struct nfs_client *clp = calldata->clp;
7317 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7318
7319 dprintk("--> %s\n", __func__);
14516c3a
TM		 7320 if (!nfs41_sequence_done(task, res))
7321 return;
fce5c838 7322
c6d01c6f 7323 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7324 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7325 rpc_restart_call_prepare(task);
7326 return;
7327 }
fce5c838
RL		 7328 dprintk("<-- %s\n", __func__);
7329}
7330
7331static void nfs4_free_reclaim_complete_data(void *data)
7332{
7333 struct nfs4_reclaim_complete_data *calldata = data;
7334
7335 kfree(calldata);
7336}
7337
7338static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7339 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7340 .rpc_call_done = nfs4_reclaim_complete_done,
7341 .rpc_release = nfs4_free_reclaim_complete_data,
7342};
7343
7344/*
7345 * Issue a global reclaim complete.
7346 */
965e9c23
TM		 7347static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7348 struct rpc_cred *cred)
fce5c838
RL		 7349{
7350 struct nfs4_reclaim_complete_data *calldata;
7351 struct rpc_task *task;
7352 struct rpc_message msg = {
7353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7354 .rpc_cred = cred,
fce5c838
RL		 7355 };
7356 struct rpc_task_setup task_setup_data = {
7357 .rpc_client = clp->cl_rpcclient,
7358 .rpc_message = &msg,
7359 .callback_ops = &nfs4_reclaim_complete_call_ops,
7360 .flags = RPC_TASK_ASYNC,
7361 };
7362 int status = -ENOMEM;
7363
7364 dprintk("--> %s\n", __func__);
8535b2be 7365 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7366 if (calldata == NULL)
7367 goto out;
7368 calldata->clp = clp;
7369 calldata->arg.one_fs = 0;
fce5c838 7370
a9c92d6b 7371 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7372 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7373 msg.rpc_argp = &calldata->arg;
7374 msg.rpc_resp = &calldata->res;
7375 task_setup_data.callback_data = calldata;
7376 task = rpc_run_task(&task_setup_data);
acf82b85 7377 if (IS_ERR(task)) {
fce5c838 7378 status = PTR_ERR(task);
acf82b85
DC		 7379 goto out;
7380 }
c34c32ea
AA		 7381 status = nfs4_wait_for_completion_rpc_task(task);
7382 if (status == 0)
7383 status = task->tk_status;
fce5c838 7384 rpc_put_task(task);
acf82b85 7385 return 0;
fce5c838
RL		 7386out:
7387 dprintk("<-- %s status=%d\n", __func__, status);
7388 return status;
7389}
b1f69b75
AA		 7390
7391static void
7392nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7393{
7394 struct nfs4_layoutget *lgp = calldata;
c31663d4 7395 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7396 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7397
7398 dprintk("--> %s\n", __func__);
c31663d4
FI		 7399 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7400 * right now covering the LAYOUTGET we are about to send.
7401 * However, that is not so catastrophic, and there seems
7402 * to be no way to prevent it completely.
7403 */
6ba7db34 7404 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7405 &lgp->res.seq_res, task))
b1f69b75 7406 return;
cf7d63f1
FI		 7407 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7408 NFS_I(lgp->args.inode)->layout,
7409 lgp->args.ctx->state)) {
7410 rpc_exit(task, NFS4_OK);
cf7d63f1 7411 }
b1f69b75
AA		 7412}
7413
7414static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7415{
7416 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7417 struct inode *inode = lgp->args.inode;
7418 struct nfs_server *server = NFS_SERVER(inode);
7419 struct pnfs_layout_hdr *lo;
7420 struct nfs4_state *state = NULL;
ed7e5423 7421 unsigned long timeo, now, giveup;
b1f69b75 7422
ed7e5423 7423 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7424
6ba7db34 7425 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7426 goto out;
b1f69b75
AA		 7427
7428 switch (task->tk_status) {
7429 case 0:
ee314c2a 7430 goto out;
ed7e5423
BH		 7431 /*
7432 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7433 * (or clients) writing to the same RAID stripe
7434 */
b1f69b75 7435 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7436 /*
7437 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7438 * existing layout before getting a new one).
7439 */
b1f69b75 7440 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7441 timeo = rpc_get_timeout(task->tk_client);
7442 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7443 now = jiffies;
7444 if (time_after(giveup, now)) {
7445 unsigned long delay;
7446
7447 /* Delay for:
7448 * - Not less then NFS4_POLL_RETRY_MIN.
7449 * - One last time a jiffie before we give up
7450 * - exponential backoff (time_now minus start_attempt)
7451 */
7452 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7453 min((giveup - now - 1),
7454 now - lgp->args.timestamp));
7455
7456 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7457 __func__, delay);
7458 rpc_delay(task, delay);
7459 task->tk_status = 0;
7460 rpc_restart_call_prepare(task);
7461 goto out; /* Do not call nfs4_async_handle_error() */
7462 }
ee314c2a
TM		 7463 break;
7464 case -NFS4ERR_EXPIRED:
7465 case -NFS4ERR_BAD_STATEID:
7466 spin_lock(&inode->i_lock);
7467 lo = NFS_I(inode)->layout;
7468 if (!lo || list_empty(&lo->plh_segs)) {
7469 spin_unlock(&inode->i_lock);
7470 /* If the open stateid was bad, then recover it. */
7471 state = lgp->args.ctx->state;
7472 } else {
7473 LIST_HEAD(head);
7474
7475 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7476 spin_unlock(&inode->i_lock);
7477 /* Mark the bad layout state as invalid, then
7478 * retry using the open stateid. */
7479 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7480 }
7481 }
ee314c2a
TM		 7482 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7483 rpc_restart_call_prepare(task);
7484out:
b1f69b75
AA		 7485 dprintk("<-- %s\n", __func__);
7486}
7487
8554116e
IK		 7488static size_t max_response_pages(struct nfs_server *server)
7489{
7490 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7491 return nfs_page_array_len(0, max_resp_sz);
7492}
7493
7494static void nfs4_free_pages(struct page **pages, size_t size)
7495{
7496 int i;
7497
7498 if (!pages)
7499 return;
7500
7501 for (i = 0; i < size; i++) {
7502 if (!pages[i])
7503 break;
7504 __free_page(pages[i]);
7505 }
7506 kfree(pages);
7507}
7508
7509static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7510{
7511 struct page **pages;
7512 int i;
7513
7514 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7515 if (!pages) {
7516 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7517 return NULL;
7518 }
7519
7520 for (i = 0; i < size; i++) {
7521 pages[i] = alloc_page(gfp_flags);
7522 if (!pages[i]) {
7523 dprintk("%s: failed to allocate page\n", __func__);
7524 nfs4_free_pages(pages, size);
7525 return NULL;
7526 }
7527 }
7528
7529 return pages;
7530}
7531
b1f69b75
AA		 7532static void nfs4_layoutget_release(void *calldata)
7533{
7534 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7535 struct inode *inode = lgp->args.inode;
7536 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7537 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7538
7539 dprintk("--> %s\n", __func__);
8554116e 7540 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7541 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7542 put_nfs_open_context(lgp->args.ctx);
7543 kfree(calldata);
7544 dprintk("<-- %s\n", __func__);
7545}
7546
7547static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7548 .rpc_call_prepare = nfs4_layoutget_prepare,
7549 .rpc_call_done = nfs4_layoutget_done,
7550 .rpc_release = nfs4_layoutget_release,
7551};
7552
a0b0a6e3
TM		 7553struct pnfs_layout_segment *
7554nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7555{
a47970ff
WAA		 7556 struct inode *inode = lgp->args.inode;
7557 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7558 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7559 struct rpc_task *task;
7560 struct rpc_message msg = {
7561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7562 .rpc_argp = &lgp->args,
7563 .rpc_resp = &lgp->res,
6ab59344 7564 .rpc_cred = lgp->cred,
b1f69b75
AA		 7565 };
7566 struct rpc_task_setup task_setup_data = {
7567 .rpc_client = server->client,
7568 .rpc_message = &msg,
7569 .callback_ops = &nfs4_layoutget_call_ops,
7570 .callback_data = lgp,
7571 .flags = RPC_TASK_ASYNC,
7572 };
a0b0a6e3 7573 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7574 int status = 0;
7575
7576 dprintk("--> %s\n", __func__);
7577
8554116e
IK		 7578 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7579 if (!lgp->args.layout.pages) {
7580 nfs4_layoutget_release(lgp);
a0b0a6e3 7581 return ERR_PTR(-ENOMEM);
8554116e
IK		 7582 }
7583 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7584 lgp->args.timestamp = jiffies;
8554116e 7585
35124a09 7586 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7587 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7588 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7589
7590 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7591 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7592
b1f69b75
AA		 7593 task = rpc_run_task(&task_setup_data);
7594 if (IS_ERR(task))
a0b0a6e3 7595 return ERR_CAST(task);
b1f69b75 7596 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7597 if (status == 0)
7598 status = task->tk_status;
1037e6ea
TM		 7599 trace_nfs4_layoutget(lgp->args.ctx,
7600 &lgp->args.range,
7601 &lgp->res.range,
7602 status);
085b7a45
WAA		 7603 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7604 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7605 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7606 rpc_put_task(task);
7607 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7608 if (status)
7609 return ERR_PTR(status);
7610 return lseg;
b1f69b75
AA		 7611}
7612
cbe82603
BH		 7613static void
7614nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7615{
7616 struct nfs4_layoutreturn *lrp = calldata;
7617
7618 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7619 nfs41_setup_sequence(lrp->clp->cl_session,
7620 &lrp->args.seq_args,
7621 &lrp->res.seq_res,
7622 task);
cbe82603
BH		 7623}
7624
7625static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7626{
7627 struct nfs4_layoutreturn *lrp = calldata;
7628 struct nfs_server *server;
7629
7630 dprintk("--> %s\n", __func__);
7631
6ba7db34 7632 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7633 return;
7634
7635 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7636 switch (task->tk_status) {
7637 default:
7638 task->tk_status = 0;
7639 case 0:
7640 break;
7641 case -NFS4ERR_DELAY:
7642 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7643 break;
d00c5d43 7644 rpc_restart_call_prepare(task);
cbe82603
BH		 7645 return;
7646 }
cbe82603
BH		 7647 dprintk("<-- %s\n", __func__);
7648}
7649
7650static void nfs4_layoutreturn_release(void *calldata)
7651{
7652 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7653 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7654
7655 dprintk("--> %s\n", __func__);
849b286f
TM		 7656 spin_lock(&lo->plh_inode->i_lock);
7657 if (lrp->res.lrs_present)
7658 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7659 lo->plh_block_lgets--;
7660 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7661 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7662 kfree(calldata);
7663 dprintk("<-- %s\n", __func__);
7664}
7665
7666static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7667 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7668 .rpc_call_done = nfs4_layoutreturn_done,
7669 .rpc_release = nfs4_layoutreturn_release,
7670};
7671
7672int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7673{
7674 struct rpc_task *task;
7675 struct rpc_message msg = {
7676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7677 .rpc_argp = &lrp->args,
7678 .rpc_resp = &lrp->res,
9556000d 7679 .rpc_cred = lrp->cred,
cbe82603
BH		 7680 };
7681 struct rpc_task_setup task_setup_data = {
1771c577 7682 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7683 .rpc_message = &msg,
7684 .callback_ops = &nfs4_layoutreturn_call_ops,
7685 .callback_data = lrp,
7686 };
7687 int status;
7688
7689 dprintk("--> %s\n", __func__);
a9c92d6b 7690 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7691 task = rpc_run_task(&task_setup_data);
7692 if (IS_ERR(task))
7693 return PTR_ERR(task);
7694 status = task->tk_status;
1037e6ea 7695 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7696 dprintk("<-- %s status=%d\n", __func__, status);
7697 rpc_put_task(task);
7698 return status;
7699}
7700
7f11d8d3
AA		 7701/*
7702 * Retrieve the list of Data Server devices from the MDS.
7703 */
7704static int _nfs4_getdevicelist(struct nfs_server *server,
7705 const struct nfs_fh *fh,
7706 struct pnfs_devicelist *devlist)
7707{
7708 struct nfs4_getdevicelist_args args = {
7709 .fh = fh,
7710 .layoutclass = server->pnfs_curr_ld->id,
7711 };
7712 struct nfs4_getdevicelist_res res = {
7713 .devlist = devlist,
7714 };
7715 struct rpc_message msg = {
7716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7717 .rpc_argp = &args,
7718 .rpc_resp = &res,
7719 };
7720 int status;
7721
7722 dprintk("--> %s\n", __func__);
7723 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7724 &res.seq_res, 0);
7725 dprintk("<-- %s status=%d\n", __func__, status);
7726 return status;
7727}
7728
7729int nfs4_proc_getdevicelist(struct nfs_server *server,
7730 const struct nfs_fh *fh,
7731 struct pnfs_devicelist *devlist)
7732{
7733 struct nfs4_exception exception = { };
7734 int err;
7735
7736 do {
7737 err = nfs4_handle_exception(server,
7738 _nfs4_getdevicelist(server, fh, devlist),
7739 &exception);
7740 } while (exception.retry);
7741
7742 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7743 err, devlist->num_devs);
7744
7745 return err;
7746}
7747EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7748
b1f69b75 7749static int
cd5875fe
TM		 7750_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7751 struct pnfs_device *pdev,
7752 struct rpc_cred *cred)
b1f69b75
AA		 7753{
7754 struct nfs4_getdeviceinfo_args args = {
7755 .pdev = pdev,
7756 };
7757 struct nfs4_getdeviceinfo_res res = {
7758 .pdev = pdev,
7759 };
7760 struct rpc_message msg = {
7761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7762 .rpc_argp = &args,
7763 .rpc_resp = &res,
cd5875fe 7764 .rpc_cred = cred,
b1f69b75
AA		 7765 };
7766 int status;
7767
7768 dprintk("--> %s\n", __func__);
7c513058 7769 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7770 dprintk("<-- %s status=%d\n", __func__, status);
7771
7772 return status;
7773}
7774
cd5875fe
TM		 7775int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7776 struct pnfs_device *pdev,
7777 struct rpc_cred *cred)
b1f69b75
AA		 7778{
7779 struct nfs4_exception exception = { };
7780 int err;
7781
7782 do {
7783 err = nfs4_handle_exception(server,
cd5875fe 7784 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7785 &exception);
7786 } while (exception.retry);
7787 return err;
7788}
7789EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7790
863a3c6c
AA		 7791static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7792{
7793 struct nfs4_layoutcommit_data *data = calldata;
7794 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7795 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7796
d9afbd1b
TM		 7797 nfs41_setup_sequence(session,
7798 &data->args.seq_args,
7799 &data->res.seq_res,
7800 task);
863a3c6c
AA		 7801}
7802
7803static void
7804nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7805{
7806 struct nfs4_layoutcommit_data *data = calldata;
7807 struct nfs_server *server = NFS_SERVER(data->args.inode);
7808
6ba7db34 7809 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7810 return;
7811
7812 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7813 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7814 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7815 case -NFS4ERR_BADLAYOUT: /* no layout */
7816 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7817 task->tk_status = 0;
e59d27e0 7818 case 0:
e59d27e0
TM		 7819 break;
7820 default:
7821 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7822 rpc_restart_call_prepare(task);
7823 return;
7824 }
7825 }
863a3c6c
AA		 7826}
7827
7828static void nfs4_layoutcommit_release(void *calldata)
7829{
7830 struct nfs4_layoutcommit_data *data = calldata;
7831
db29c089 7832 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7833 nfs_post_op_update_inode_force_wcc(data->args.inode,
7834 data->res.fattr);
863a3c6c
AA		 7835 put_rpccred(data->cred);
7836 kfree(data);
7837}
7838
7839static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7840 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7841 .rpc_call_done = nfs4_layoutcommit_done,
7842 .rpc_release = nfs4_layoutcommit_release,
7843};
7844
7845int
ef311537 7846nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7847{
7848 struct rpc_message msg = {
7849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7850 .rpc_argp = &data->args,
7851 .rpc_resp = &data->res,
7852 .rpc_cred = data->cred,
7853 };
7854 struct rpc_task_setup task_setup_data = {
7855 .task = &data->task,
7856 .rpc_client = NFS_CLIENT(data->args.inode),
7857 .rpc_message = &msg,
7858 .callback_ops = &nfs4_layoutcommit_ops,
7859 .callback_data = data,
7860 .flags = RPC_TASK_ASYNC,
7861 };
7862 struct rpc_task *task;
7863 int status = 0;
7864
7865 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7866 "lbw: %llu inode %lu\n",
7867 data->task.tk_pid, sync,
7868 data->args.lastbytewritten,
7869 data->args.inode->i_ino);
7870
a9c92d6b 7871 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7872 task = rpc_run_task(&task_setup_data);
7873 if (IS_ERR(task))
7874 return PTR_ERR(task);
ef311537 7875 if (sync == false)
863a3c6c
AA		 7876 goto out;
7877 status = nfs4_wait_for_completion_rpc_task(task);
7878 if (status != 0)
7879 goto out;
7880 status = task->tk_status;
1037e6ea 7881 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7882out:
7883 dprintk("%s: status %d\n", __func__, status);
7884 rpc_put_task(task);
7885 return status;
7886}
fca78d6d 7887
97431204
AA		 7888/**
7889 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7890 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7891 */
fca78d6d
BS		 7892static int
7893_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7894 struct nfs_fsinfo *info,
7895 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7896{
7897 struct nfs41_secinfo_no_name_args args = {
7898 .style = SECINFO_STYLE_CURRENT_FH,
7899 };
7900 struct nfs4_secinfo_res res = {
7901 .flavors = flavors,
7902 };
7903 struct rpc_message msg = {
7904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7905 .rpc_argp = &args,
7906 .rpc_resp = &res,
7907 };
b1b3e136 7908 struct rpc_clnt *clnt = server->client;
7cb852df 7909 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7910 int status;
7911
7912 if (use_integrity) {
7913 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7914 cred = nfs4_get_clid_cred(server->nfs_client);
7915 msg.rpc_cred = cred;
b1b3e136
WAA		 7916 }
7917
7918 dprintk("--> %s\n", __func__);
7919 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7920 &res.seq_res, 0);
7921 dprintk("<-- %s status=%d\n", __func__, status);
7922
7cb852df
WAA		 7923 if (cred)
7924 put_rpccred(cred);
b1b3e136
WAA		 7925
7926 return status;
fca78d6d
BS		 7927}
7928
7929static int
7930nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7931 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7932{
7933 struct nfs4_exception exception = { };
7934 int err;
7935 do {
b1b3e136
WAA		 7936 /* first try using integrity protection */
7937 err = -NFS4ERR_WRONGSEC;
7938
7939 /* try to use integrity protection with machine cred */
7940 if (_nfs4_is_integrity_protected(server->nfs_client))
7941 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7942 flavors, true);
7943
7944 /*
7945 * if unable to use integrity protection, or SECINFO with
7946 * integrity protection returns NFS4ERR_WRONGSEC (which is
7947 * disallowed by spec, but exists in deployed servers) use
7948 * the current filesystem's rpc_client and the user cred.
7949 */
7950 if (err == -NFS4ERR_WRONGSEC)
7951 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7952 flavors, false);
7953
fca78d6d
BS		 7954 switch (err) {
7955 case 0:
7956 case -NFS4ERR_WRONGSEC:
78b19bae 7957 case -ENOTSUPP:
05e9cfb4 7958 goto out;
fca78d6d
BS		 7959 default:
7960 err = nfs4_handle_exception(server, err, &exception);
7961 }
7962 } while (exception.retry);
05e9cfb4 7963out:
fca78d6d
BS		 7964 return err;
7965}
7966
7967static int
7968nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7969 struct nfs_fsinfo *info)
7970{
7971 int err;
7972 struct page *page;
367156d9 7973 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7974 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7975 struct nfs4_secinfo4 *secinfo;
7976 int i;
fca78d6d
BS		 7977
7978 page = alloc_page(GFP_KERNEL);
7979 if (!page) {
7980 err = -ENOMEM;
7981 goto out;
7982 }
7983
7984 flavors = page_address(page);
7985 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7986
7987 /*
7988 * Fall back on "guess and check" method if
7989 * the server doesn't support SECINFO_NO_NAME
7990 */
78b19bae 7991 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 7992 err = nfs4_find_root_sec(server, fhandle, info);
7993 goto out_freepage;
7994 }
7995 if (err)
7996 goto out_freepage;
7997
58a8cf12
WAA		 7998 for (i = 0; i < flavors->num_flavors; i++) {
7999 secinfo = &flavors->flavors[i];
8000
8001 switch (secinfo->flavor) {
8002 case RPC_AUTH_NULL:
8003 case RPC_AUTH_UNIX:
8004 case RPC_AUTH_GSS:
8005 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8006 &secinfo->flavor_info);
8007 break;
8008 default:
8009 flavor = RPC_AUTH_MAXFLAVOR;
8010 break;
8011 }
8012
4d4b69dd
WAA		 8013 if (!nfs_auth_info_match(&server->auth_info, flavor))
8014 flavor = RPC_AUTH_MAXFLAVOR;
8015
58a8cf12
WAA		 8016 if (flavor != RPC_AUTH_MAXFLAVOR) {
8017 err = nfs4_lookup_root_sec(server, fhandle,
8018 info, flavor);
8019 if (!err)
8020 break;
8021 }
8022 }
8023
8024 if (flavor == RPC_AUTH_MAXFLAVOR)
8025 err = -EPERM;
fca78d6d
BS		 8026
8027out_freepage:
8028 put_page(page);
8029 if (err == -EACCES)
8030 return -EPERM;
8031out:
8032 return err;
8033}
1cab0652 8034
ab7cb0df
TM		 8035static int _nfs41_test_stateid(struct nfs_server *server,
8036 nfs4_stateid *stateid,
8037 struct rpc_cred *cred)
7d974794
BS		 8038{
8039 int status;
8040 struct nfs41_test_stateid_args args = {
1cab0652 8041 .stateid = stateid,
7d974794
BS		 8042 };
8043 struct nfs41_test_stateid_res res;
8044 struct rpc_message msg = {
8045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8046 .rpc_argp = &args,
8047 .rpc_resp = &res,
ab7cb0df 8048 .rpc_cred = cred,
7d974794 8049 };
3787d506
WAA		 8050 struct rpc_clnt *rpc_client = server->client;
8051
8052 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8053 &rpc_client, &msg);
1cab0652 8054
38527b15 8055 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8056 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8057 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8058 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8059 &args.seq_args, &res.seq_res);
38527b15
CL		 8060 if (status != NFS_OK) {
8061 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8062 return status;
38527b15
CL		 8063 }
8064 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8065 return -res.status;
7d974794
BS		 8066}
8067
38527b15
CL		 8068/**
8069 * nfs41_test_stateid - perform a TEST_STATEID operation
8070 *
8071 * @server: server / transport on which to perform the operation
8072 * @stateid: state ID to test
ab7cb0df 8073 * @cred: credential
38527b15
CL		 8074 *
8075 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8076 * Otherwise a negative NFS4ERR value is returned if the operation
8077 * failed or the state ID is not currently valid.
8078 */
ab7cb0df
TM		 8079static int nfs41_test_stateid(struct nfs_server *server,
8080 nfs4_stateid *stateid,
8081 struct rpc_cred *cred)
7d974794
BS		 8082{
8083 struct nfs4_exception exception = { };
8084 int err;
8085 do {
ab7cb0df 8086 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8087 if (err != -NFS4ERR_DELAY)
8088 break;
8089 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8090 } while (exception.retry);
8091 return err;
8092}
9aeda35f 8093
7c1d5fae
TM		 8094struct nfs_free_stateid_data {
8095 struct nfs_server *server;
8096 struct nfs41_free_stateid_args args;
9aeda35f 8097 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8098};
8099
8100static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8101{
8102 struct nfs_free_stateid_data *data = calldata;
8103 nfs41_setup_sequence(nfs4_get_session(data->server),
8104 &data->args.seq_args,
8105 &data->res.seq_res,
8106 task);
8107}
8108
8109static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8110{
8111 struct nfs_free_stateid_data *data = calldata;
8112
8113 nfs41_sequence_done(task, &data->res.seq_res);
8114
8115 switch (task->tk_status) {
8116 case -NFS4ERR_DELAY:
8117 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8118 rpc_restart_call_prepare(task);
8119 }
8120}
8121
8122static void nfs41_free_stateid_release(void *calldata)
8123{
8124 kfree(calldata);
8125}
8126
17f26b12 8127static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8128 .rpc_call_prepare = nfs41_free_stateid_prepare,
8129 .rpc_call_done = nfs41_free_stateid_done,
8130 .rpc_release = nfs41_free_stateid_release,
8131};
8132
8133static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8134 nfs4_stateid *stateid,
ab7cb0df 8135 struct rpc_cred *cred,
7c1d5fae
TM		 8136 bool privileged)
8137{
9aeda35f
BS		 8138 struct rpc_message msg = {
8139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8140 .rpc_cred = cred,
9aeda35f 8141 };
7c1d5fae
TM		 8142 struct rpc_task_setup task_setup = {
8143 .rpc_client = server->client,
8144 .rpc_message = &msg,
8145 .callback_ops = &nfs41_free_stateid_ops,
8146 .flags = RPC_TASK_ASYNC,
8147 };
8148 struct nfs_free_stateid_data *data;
9aeda35f 8149
3787d506
WAA		 8150 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8151 &task_setup.rpc_client, &msg);
8152
38527b15 8153 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8154 data = kmalloc(sizeof(*data), GFP_NOFS);
8155 if (!data)
8156 return ERR_PTR(-ENOMEM);
8157 data->server = server;
8158 nfs4_stateid_copy(&data->args.stateid, stateid);
8159
8160 task_setup.callback_data = data;
8161
8162 msg.rpc_argp = &data->args;
8163 msg.rpc_resp = &data->res;
a9c92d6b 8164 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8165 if (privileged)
8166 nfs4_set_sequence_privileged(&data->args.seq_args);
8167
8168 return rpc_run_task(&task_setup);
9aeda35f
BS		 8169}
8170
38527b15
CL		 8171/**
8172 * nfs41_free_stateid - perform a FREE_STATEID operation
8173 *
8174 * @server: server / transport on which to perform the operation
8175 * @stateid: state ID to release
ab7cb0df 8176 * @cred: credential
38527b15
CL		 8177 *
8178 * Returns NFS_OK if the server freed "stateid". Otherwise a
8179 * negative NFS4ERR value is returned.
8180 */
ab7cb0df
TM		 8181static int nfs41_free_stateid(struct nfs_server *server,
8182 nfs4_stateid *stateid,
8183 struct rpc_cred *cred)
9aeda35f 8184{
7c1d5fae
TM		 8185 struct rpc_task *task;
8186 int ret;
8187
ab7cb0df 8188 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8189 if (IS_ERR(task))
8190 return PTR_ERR(task);
8191 ret = rpc_wait_for_completion_task(task);
8192 if (!ret)
8193 ret = task->tk_status;
8194 rpc_put_task(task);
8195 return ret;
9aeda35f 8196}
36281caa 8197
c8b2d0bf
TM		 8198static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8199{
8200 struct rpc_task *task;
ab7cb0df 8201 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8202
ab7cb0df 8203 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8204 nfs4_free_lock_state(server, lsp);
8205 if (IS_ERR(task))
8206 return PTR_ERR(task);
8207 rpc_put_task(task);
8208 return 0;
8209}
8210
36281caa
TM		 8211static bool nfs41_match_stateid(const nfs4_stateid *s1,
8212 const nfs4_stateid *s2)
8213{
2d2f24ad 8214 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8215 return false;
8216
2d2f24ad 8217 if (s1->seqid == s2->seqid)
36281caa 8218 return true;
2d2f24ad 8219 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8220 return true;
8221
8222 return false;
8223}
8224
557134a3
AA		 8225#endif /* CONFIG_NFS_V4_1 */
8226
36281caa
TM		 8227static bool nfs4_match_stateid(const nfs4_stateid *s1,
8228 const nfs4_stateid *s2)
8229{
f597c537 8230 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8231}
8232
8233
17280175 8234static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8235 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8236 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8237 .recover_open = nfs4_open_reclaim,
8238 .recover_lock = nfs4_lock_reclaim,
591d71cb 8239 .establish_clid = nfs4_init_clientid,
05f4c350 8240 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8241};
8242
591d71cb 8243#if defined(CONFIG_NFS_V4_1)
17280175 8244static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8245 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8246 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8247 .recover_open = nfs4_open_reclaim,
8248 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8249 .establish_clid = nfs41_init_clientid,
fce5c838 8250 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8251 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8252};
8253#endif /* CONFIG_NFS_V4_1 */
8254
17280175 8255static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8256 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8257 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8258 .recover_open = nfs4_open_expired,
8259 .recover_lock = nfs4_lock_expired,
8260 .establish_clid = nfs4_init_clientid,
8261};
8262
8263#if defined(CONFIG_NFS_V4_1)
17280175 8264static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8265 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8266 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8267 .recover_open = nfs41_open_expired,
8268 .recover_lock = nfs41_lock_expired,
4d643d1d 8269 .establish_clid = nfs41_init_clientid,
1da177e4 8270};
591d71cb 8271#endif /* CONFIG_NFS_V4_1 */
1da177e4 8272
17280175 8273static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8274 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8275 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8276 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8277};
8278
8279#if defined(CONFIG_NFS_V4_1)
17280175 8280static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8281 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8282 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8283 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8284};
8285#endif
8286
ec011fe8 8287static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8288 .get_locations = _nfs40_proc_get_locations,
44c99933 8289 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8290};
8291
8292#if defined(CONFIG_NFS_V4_1)
8293static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8294 .get_locations = _nfs41_proc_get_locations,
44c99933 8295 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8296};
8297#endif /* CONFIG_NFS_V4_1 */
8298
97dc1359
TM		 8299static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8300 .minor_version = 0,
39c6daae
TM		 8301 .init_caps = NFS_CAP_READDIRPLUS
8302 | NFS_CAP_ATOMIC_OPEN
8303 | NFS_CAP_CHANGE_ATTR
8304 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8305 .init_client = nfs40_init_client,
8306 .shutdown_client = nfs40_shutdown_client,
36281caa 8307 .match_stateid = nfs4_match_stateid,
fca78d6d 8308 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8309 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8310 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8311 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8312 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8313 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8314 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8315};
8316
8317#if defined(CONFIG_NFS_V4_1)
8318static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8319 .minor_version = 1,
39c6daae
TM		 8320 .init_caps = NFS_CAP_READDIRPLUS
8321 | NFS_CAP_ATOMIC_OPEN
8322 | NFS_CAP_CHANGE_ATTR
3b66486c 8323 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8324 | NFS_CAP_STATEID_NFSV41
8325 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8326 .init_client = nfs41_init_client,
8327 .shutdown_client = nfs41_shutdown_client,
36281caa 8328 .match_stateid = nfs41_match_stateid,
fca78d6d 8329 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8330 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8331 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8332 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8333 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8334 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8335 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8336};
8337#endif
8338
42c2c424
SD		 8339#if defined(CONFIG_NFS_V4_2)
8340static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8341 .minor_version = 2,
7017310a
BS		 8342 .init_caps = NFS_CAP_READDIRPLUS
8343 | NFS_CAP_ATOMIC_OPEN
8344 | NFS_CAP_CHANGE_ATTR
8345 | NFS_CAP_POSIX_LOCK
8346 | NFS_CAP_STATEID_NFSV41
8347 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8348 .init_client = nfs41_init_client,
8349 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8350 .match_stateid = nfs41_match_stateid,
8351 .find_root_sec = nfs41_find_root_sec,
7017310a 8352 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8353 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8354 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8355 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8356 .state_renewal_ops = &nfs41_state_renewal_ops,
8357};
8358#endif
8359
97dc1359
TM		 8360const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8361 [0] = &nfs_v4_0_minor_ops,
8362#if defined(CONFIG_NFS_V4_1)
8363 [1] = &nfs_v4_1_minor_ops,
8364#endif
42c2c424
SD		 8365#if defined(CONFIG_NFS_V4_2)
8366 [2] = &nfs_v4_2_minor_ops,
8367#endif
97dc1359
TM		 8368};
8369
17f26b12 8370static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8371 .create = nfs_create,
8372 .lookup = nfs_lookup,
8373 .atomic_open = nfs_atomic_open,
8374 .link = nfs_link,
8375 .unlink = nfs_unlink,
8376 .symlink = nfs_symlink,
8377 .mkdir = nfs_mkdir,
8378 .rmdir = nfs_rmdir,
8379 .mknod = nfs_mknod,
8380 .rename = nfs_rename,
8381 .permission = nfs_permission,
8382 .getattr = nfs_getattr,
8383 .setattr = nfs_setattr,
8384 .getxattr = generic_getxattr,
8385 .setxattr = generic_setxattr,
8386 .listxattr = generic_listxattr,
8387 .removexattr = generic_removexattr,
8388};
8389
92e1d5be 8390static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8391 .permission = nfs_permission,
8392 .getattr = nfs_getattr,
8393 .setattr = nfs_setattr,
64c2ce8b
AK		 8394 .getxattr = generic_getxattr,
8395 .setxattr = generic_setxattr,
8396 .listxattr = generic_listxattr,
8397 .removexattr = generic_removexattr,
6b3b5496
BF		 8398};
8399
509de811 8400const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8401 .version = 4, /* protocol version */
8402 .dentry_ops = &nfs4_dentry_operations,
8403 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8404 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8405 .file_ops = &nfs4_file_operations,
1da177e4 8406 .getroot = nfs4_proc_get_root,
281cad46 8407 .submount = nfs4_submount,
ff9099f2 8408 .try_mount = nfs4_try_mount,
1da177e4
LT		 8409 .getattr = nfs4_proc_getattr,
8410 .setattr = nfs4_proc_setattr,
8411 .lookup = nfs4_proc_lookup,
8412 .access = nfs4_proc_access,
8413 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8414 .create = nfs4_proc_create,
8415 .remove = nfs4_proc_remove,
8416 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8417 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8418 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8419 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8420 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8421 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8422 .link = nfs4_proc_link,
8423 .symlink = nfs4_proc_symlink,
8424 .mkdir = nfs4_proc_mkdir,
8425 .rmdir = nfs4_proc_remove,
8426 .readdir = nfs4_proc_readdir,
8427 .mknod = nfs4_proc_mknod,
8428 .statfs = nfs4_proc_statfs,
8429 .fsinfo = nfs4_proc_fsinfo,
8430 .pathconf = nfs4_proc_pathconf,
e9326dca 8431 .set_capabilities = nfs4_server_capabilities,
1da177e4 8432 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8433 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8434 .read_setup = nfs4_proc_read_setup,
ec06c096 8435 .read_done = nfs4_read_done,
1da177e4 8436 .write_setup = nfs4_proc_write_setup,
788e7a89 8437 .write_done = nfs4_write_done,
1da177e4 8438 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8439 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8440 .commit_done = nfs4_commit_done,
1da177e4 8441 .lock = nfs4_proc_lock,
e50a1c2e 8442 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8443 .close_context = nfs4_close_context,
2b484297 8444 .open_context = nfs4_atomic_open,
011e2a7f 8445 .have_delegation = nfs4_have_delegation,
57ec14c5 8446 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8447 .alloc_client = nfs4_alloc_client,
45a52a02 8448 .init_client = nfs4_init_client,
cdb7eced 8449 .free_client = nfs4_free_client,
1179acc6
BS		 8450 .create_server = nfs4_create_server,
8451 .clone_server = nfs_clone_server,
1da177e4
LT		 8452};
8453
64c2ce8b
AK		 8454static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8455 .prefix = XATTR_NAME_NFSV4_ACL,
8456 .list = nfs4_xattr_list_nfs4_acl,
8457 .get = nfs4_xattr_get_nfs4_acl,
8458 .set = nfs4_xattr_set_nfs4_acl,
8459};
8460
8461const struct xattr_handler *nfs4_xattr_handlers[] = {
8462 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8463#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8464 &nfs4_xattr_nfs4_label_handler,
8465#endif
64c2ce8b
AK		 8466 NULL
8467};
8468
1da177e4
LT		 8469/*
8470 * Local variables:
8471 * c-basic-offset: 8
8472 * End:
8473 */
Linux 6.x block layer and io_uring tree(s)