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NFS: Move NFS v3 acl functions to nfs3_fs.h
[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 (;;) {
61beef75 1310 spin_lock(&state->owner->so_lock);
dc0b027d 1311 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1312 update_open_stateflags(state, fmode);
6ee41268 1313 spin_unlock(&state->owner->so_lock);
61beef75 1314 goto out_return_state;
6ee41268 1315 }
61beef75 1316 spin_unlock(&state->owner->so_lock);
34310430
TM		 1317 rcu_read_lock();
1318 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1319 if (!can_open_delegated(delegation, fmode)) {
34310430 1320 rcu_read_unlock();
aac00a8d 1321 break;
34310430 1322 }
aac00a8d 1323 /* Save the delegation */
f597c537 1324 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1325 rcu_read_unlock();
fa332941 1326 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1327 if (!opendata->is_recover) {
1328 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1329 if (ret != 0)
1330 goto out;
1331 }
aac00a8d 1332 ret = -EAGAIN;
34310430
TM		 1333
1334 /* Try to update the stateid using the delegation */
dc0b027d 1335 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1336 goto out_return_state;
aac00a8d 1337 }
aac00a8d
TM		 1338out:
1339 return ERR_PTR(ret);
1340out_return_state:
1341 atomic_inc(&state->count);
1342 return state;
1343}
1344
e23008ec
AA		 1345static void
1346nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1347{
1348 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1349 struct nfs_delegation *delegation;
1350 int delegation_flags = 0;
1351
1352 rcu_read_lock();
1353 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1354 if (delegation)
1355 delegation_flags = delegation->flags;
1356 rcu_read_unlock();
1357 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1358 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1359 "returning a delegation for "
1360 "OPEN(CLAIM_DELEGATE_CUR)\n",
1361 clp->cl_hostname);
1362 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1363 nfs_inode_set_delegation(state->inode,
1364 data->owner->so_cred,
1365 &data->o_res);
1366 else
1367 nfs_inode_reclaim_delegation(state->inode,
1368 data->owner->so_cred,
1369 &data->o_res);
1370}
1371
1372/*
1373 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1374 * and update the nfs4_state.
1375 */
1376static struct nfs4_state *
1377_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1378{
1379 struct inode *inode = data->state->inode;
1380 struct nfs4_state *state = data->state;
1381 int ret;
1382
d2bfda2e
WAA		 1383 if (!data->rpc_done) {
1384 if (data->rpc_status) {
1385 ret = data->rpc_status;
1386 goto err;
1387 }
1388 /* cached opens have already been processed */
1389 goto update;
e23008ec
AA		 1390 }
1391
e23008ec
AA		 1392 ret = nfs_refresh_inode(inode, &data->f_attr);
1393 if (ret)
1394 goto err;
1395
1396 if (data->o_res.delegation_type != 0)
1397 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1398update:
e23008ec
AA		 1399 update_open_stateid(state, &data->o_res.stateid, NULL,
1400 data->o_arg.fmode);
d49f042a 1401 atomic_inc(&state->count);
e23008ec
AA		 1402
1403 return state;
1404err:
1405 return ERR_PTR(ret);
1406
1407}
1408
1409static struct nfs4_state *
1410_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1411{
1412 struct inode *inode;
1413 struct nfs4_state *state = NULL;
1b370bc2 1414 int ret;
24ac23ab 1415
aac00a8d 1416 if (!data->rpc_done) {
6ee41268 1417 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1418 goto out;
1419 }
1420
1b370bc2 1421 ret = -EAGAIN;
24ac23ab 1422 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1423 goto err;
1775fd3e 1424 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1425 ret = PTR_ERR(inode);
03f28e3a 1426 if (IS_ERR(inode))
1b370bc2
TM		 1427 goto err;
1428 ret = -ENOMEM;
24ac23ab
TM		 1429 state = nfs4_get_open_state(inode, data->owner);
1430 if (state == NULL)
1b370bc2 1431 goto err_put_inode;
e23008ec
AA		 1432 if (data->o_res.delegation_type != 0)
1433 nfs4_opendata_check_deleg(data, state);
34310430 1434 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1435 data->o_arg.fmode);
24ac23ab 1436 iput(inode);
aac00a8d 1437out:
7aa262b5 1438 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1439 return state;
1b370bc2
TM		 1440err_put_inode:
1441 iput(inode);
1442err:
1443 return ERR_PTR(ret);
24ac23ab
TM		 1444}
1445
e23008ec
AA		 1446static struct nfs4_state *
1447nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1448{
1449 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1450 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1451 return _nfs4_opendata_to_nfs4_state(data);
1452}
1453
864472e9
TM		 1454static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1455{
1456 struct nfs_inode *nfsi = NFS_I(state->inode);
1457 struct nfs_open_context *ctx;
1458
1459 spin_lock(&state->inode->i_lock);
1460 list_for_each_entry(ctx, &nfsi->open_files, list) {
1461 if (ctx->state != state)
1462 continue;
1463 get_nfs_open_context(ctx);
1464 spin_unlock(&state->inode->i_lock);
1465 return ctx;
1466 }
1467 spin_unlock(&state->inode->i_lock);
1468 return ERR_PTR(-ENOENT);
1469}
1470
4a1c0893
TM		 1471static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1472 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1473{
1474 struct nfs4_opendata *opendata;
1475
4a1c0893 1476 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1477 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1478 if (opendata == NULL)
1479 return ERR_PTR(-ENOMEM);
1480 opendata->state = state;
1481 atomic_inc(&state->count);
1482 return opendata;
1483}
1484
dc0b027d 1485static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1486{
2ced46c2 1487 struct nfs4_state *newstate;
864472e9
TM		 1488 int ret;
1489
dc0b027d
TM		 1490 opendata->o_arg.open_flags = 0;
1491 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1492 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1493 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1494 nfs4_init_opendata_res(opendata);
b257957e 1495 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1496 if (ret != 0)
1497 return ret;
2ced46c2 1498 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1499 if (IS_ERR(newstate))
1500 return PTR_ERR(newstate);
643168c2 1501 nfs4_close_state(newstate, fmode);
2ced46c2 1502 *res = newstate;
864472e9
TM		 1503 return 0;
1504}
1505
1506static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1507{
864472e9 1508 struct nfs4_state *newstate;
864472e9
TM		 1509 int ret;
1510
4f14c194
TM		 1511 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1512 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1513 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1514 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1515 /* memory barrier prior to reading state->n_* */
2ced46c2 1516 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1517 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1518 smp_rmb();
1519 if (state->n_rdwr != 0) {
2ced46c2 1520 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1521 if (ret != 0)
1522 return ret;
2ced46c2
TM		 1523 if (newstate != state)
1524 return -ESTALE;
864472e9
TM		 1525 }
1526 if (state->n_wronly != 0) {
2ced46c2 1527 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1528 if (ret != 0)
1529 return ret;
2ced46c2
TM		 1530 if (newstate != state)
1531 return -ESTALE;
864472e9
TM		 1532 }
1533 if (state->n_rdonly != 0) {
2ced46c2 1534 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1535 if (ret != 0)
1536 return ret;
2ced46c2
TM		 1537 if (newstate != state)
1538 return -ESTALE;
864472e9 1539 }
1ac7e2fd
TM		 1540 /*
1541 * We may have performed cached opens for all three recoveries.
1542 * Check if we need to update the current stateid.
1543 */
1544 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1545 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1546 write_seqlock(&state->seqlock);
1ac7e2fd 1547 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1548 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1549 write_sequnlock(&state->seqlock);
1ac7e2fd 1550 }
864472e9
TM		 1551 return 0;
1552}
1553
1da177e4
LT		 1554/*
1555 * OPEN_RECLAIM:
1556 * reclaim state on the server after a reboot.
1da177e4 1557 */
539cd03a 1558static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1559{
1ac7e2fd 1560 struct nfs_delegation *delegation;
864472e9 1561 struct nfs4_opendata *opendata;
dc0b027d 1562 fmode_t delegation_type = 0;
1da177e4
LT		 1563 int status;
1564
4a1c0893
TM		 1565 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1566 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1567 if (IS_ERR(opendata))
1568 return PTR_ERR(opendata);
1ac7e2fd
TM		 1569 rcu_read_lock();
1570 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1571 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1572 delegation_type = delegation->type;
1ac7e2fd 1573 rcu_read_unlock();
864472e9
TM		 1574 opendata->o_arg.u.delegation_type = delegation_type;
1575 status = nfs4_open_recover(opendata, state);
c6d00e63 1576 nfs4_opendata_put(opendata);
1da177e4
LT		 1577 return status;
1578}
1579
539cd03a 1580static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1581{
1582 struct nfs_server *server = NFS_SERVER(state->inode);
1583 struct nfs4_exception exception = { };
1584 int err;
1585 do {
539cd03a 1586 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1587 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1588 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1589 continue;
168667c4 1590 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1591 break;
1592 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1593 } while (exception.retry);
1594 return err;
1595}
1596
864472e9
TM		 1597static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1598{
1599 struct nfs_open_context *ctx;
1600 int ret;
1601
1602 ctx = nfs4_state_find_open_context(state);
1603 if (IS_ERR(ctx))
91876b13 1604 return -EAGAIN;
539cd03a 1605 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1606 put_nfs_open_context(ctx);
1607 return ret;
1608}
1609
db4f2e63 1610static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1611{
be76b5b6
TM		 1612 switch (err) {
1613 default:
1614 printk(KERN_ERR "NFS: %s: unhandled error "
1615 "%d.\n", __func__, err);
1616 case 0:
1617 case -ENOENT:
1618 case -ESTALE:
1619 break;
1620 case -NFS4ERR_BADSESSION:
1621 case -NFS4ERR_BADSLOT:
1622 case -NFS4ERR_BAD_HIGH_SLOT:
1623 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1624 case -NFS4ERR_DEADSESSION:
1625 set_bit(NFS_DELEGATED_STATE, &state->flags);
1626 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1627 return -EAGAIN;
1628 case -NFS4ERR_STALE_CLIENTID:
1629 case -NFS4ERR_STALE_STATEID:
1630 set_bit(NFS_DELEGATED_STATE, &state->flags);
1631 case -NFS4ERR_EXPIRED:
1632 /* Don't recall a delegation if it was lost */
1633 nfs4_schedule_lease_recovery(server->nfs_client);
1634 return -EAGAIN;
352297b9
CL		 1635 case -NFS4ERR_MOVED:
1636 nfs4_schedule_migration_recovery(server);
1637 return -EAGAIN;
8ef2f8d4
CL		 1638 case -NFS4ERR_LEASE_MOVED:
1639 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1640 return -EAGAIN;
be76b5b6
TM		 1641 case -NFS4ERR_DELEG_REVOKED:
1642 case -NFS4ERR_ADMIN_REVOKED:
1643 case -NFS4ERR_BAD_STATEID:
db4f2e63 1644 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1645 nfs_inode_find_state_and_recover(state->inode,
1646 stateid);
1647 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1648 return 0;
1649 case -NFS4ERR_DELAY:
1650 case -NFS4ERR_GRACE:
1651 set_bit(NFS_DELEGATED_STATE, &state->flags);
1652 ssleep(1);
1653 return -EAGAIN;
db4f2e63
TM		 1654 case -ENOMEM:
1655 case -NFS4ERR_DENIED:
1656 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1657 return 0;
be76b5b6 1658 }
1da177e4
LT		 1659 return err;
1660}
1661
db4f2e63
TM		 1662int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1663{
1664 struct nfs_server *server = NFS_SERVER(state->inode);
1665 struct nfs4_opendata *opendata;
1666 int err;
1667
1668 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1669 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1670 if (IS_ERR(opendata))
1671 return PTR_ERR(opendata);
1672 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1673 err = nfs4_open_recover(opendata, state);
1674 nfs4_opendata_put(opendata);
1675 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1676}
1677
be05c860
CL		 1678static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1679{
1680 struct nfs4_opendata *data = calldata;
1681
17ead6c8
TM		 1682 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1683 &data->c_res.seq_res, task);
be05c860
CL		 1684}
1685
cdd4e68b
TM		 1686static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1687{
1688 struct nfs4_opendata *data = calldata;
1689
17ead6c8 1690 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1691
cdd4e68b 1692 data->rpc_status = task->tk_status;
26e976a8 1693 if (data->rpc_status == 0) {
f597c537 1694 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1696 renew_lease(data->o_res.server, data->timestamp);
3e309914 1697 data->rpc_done = 1;
26e976a8 1698 }
cdd4e68b
TM		 1699}
1700
1701static void nfs4_open_confirm_release(void *calldata)
1702{
1703 struct nfs4_opendata *data = calldata;
1704 struct nfs4_state *state = NULL;
1705
1706 /* If this request hasn't been cancelled, do nothing */
1707 if (data->cancelled == 0)
1708 goto out_free;
1709 /* In case of error, no cleanup! */
3e309914 1710 if (!data->rpc_done)
cdd4e68b 1711 goto out_free;
cdd4e68b 1712 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1713 if (!IS_ERR(state))
643168c2 1714 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1715out_free:
c6d00e63 1716 nfs4_opendata_put(data);
cdd4e68b
TM		 1717}
1718
1719static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1720 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1721 .rpc_call_done = nfs4_open_confirm_done,
1722 .rpc_release = nfs4_open_confirm_release,
1723};
1724
1725/*
1726 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1727 */
1728static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1729{
1730 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1731 struct rpc_task *task;
5138fde0
TM		 1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1734 .rpc_argp = &data->c_arg,
1735 .rpc_resp = &data->c_res,
1736 .rpc_cred = data->owner->so_cred,
1737 };
c970aa85
TM		 1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
5138fde0 1740 .rpc_message = &msg,
c970aa85
TM		 1741 .callback_ops = &nfs4_open_confirm_ops,
1742 .callback_data = data,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
1da177e4
LT		 1746 int status;
1747
17ead6c8 1748 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1749 kref_get(&data->kref);
3e309914
TM		 1750 data->rpc_done = 0;
1751 data->rpc_status = 0;
5138fde0 1752 data->timestamp = jiffies;
c970aa85 1753 task = rpc_run_task(&task_setup_data);
7a1218a2 1754 if (IS_ERR(task))
cdd4e68b 1755 return PTR_ERR(task);
cdd4e68b
TM		 1756 status = nfs4_wait_for_completion_rpc_task(task);
1757 if (status != 0) {
1758 data->cancelled = 1;
1759 smp_wmb();
1760 } else
1761 status = data->rpc_status;
e6b3c4db 1762 rpc_put_task(task);
1da177e4
LT		 1763 return status;
1764}
1765
24ac23ab 1766static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1767{
24ac23ab
TM		 1768 struct nfs4_opendata *data = calldata;
1769 struct nfs4_state_owner *sp = data->owner;
549b19cc 1770 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1771
24ac23ab 1772 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1773 goto out_wait;
aac00a8d
TM		 1774 /*
1775 * Check if we still need to send an OPEN call, or if we can use
1776 * a delegation instead.
1777 */
1778 if (data->state != NULL) {
1779 struct nfs_delegation *delegation;
1780
dc0b027d 1781 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1782 goto out_no_action;
aac00a8d
TM		 1783 rcu_read_lock();
1784 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1785 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1786 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1787 can_open_delegated(delegation, data->o_arg.fmode))
1788 goto unlock_no_action;
aac00a8d
TM		 1789 rcu_read_unlock();
1790 }
95b72eb0 1791 /* Update client id. */
549b19cc 1792 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1793 switch (data->o_arg.claim) {
1794 case NFS4_OPEN_CLAIM_PREVIOUS:
1795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1796 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1797 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1798 case NFS4_OPEN_CLAIM_FH:
1799 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1800 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1801 }
26e976a8 1802 data->timestamp = jiffies;
035168ab 1803 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1804 &data->o_arg.seq_args,
2240a9e2
TM		 1805 &data->o_res.seq_res,
1806 task) != 0)
1807 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1808
1809 /* Set the create mode (note dependency on the session type) */
1810 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1811 if (data->o_arg.open_flags & O_EXCL) {
1812 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1813 if (nfs4_has_persistent_session(clp))
1814 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1815 else if (clp->cl_mvops->minor_version > 0)
1816 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1817 }
6ee41268 1818 return;
652f89f6
TM		 1819unlock_no_action:
1820 rcu_read_unlock();
6ee41268
TM		 1821out_no_action:
1822 task->tk_action = NULL;
c8da19b9 1823out_wait:
b75ad4cd 1824 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1825}
1826
24ac23ab
TM		 1827static void nfs4_open_done(struct rpc_task *task, void *calldata)
1828{
1829 struct nfs4_opendata *data = calldata;
1da177e4 1830
24ac23ab 1831 data->rpc_status = task->tk_status;
d898528c 1832
14516c3a
TM		 1833 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1834 return;
d898528c 1835
24ac23ab 1836 if (task->tk_status == 0) {
807d66d8
TM		 1837 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1838 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1839 case S_IFREG:
1840 break;
1841 case S_IFLNK:
24ac23ab 1842 data->rpc_status = -ELOOP;
6f926b5b
TM		 1843 break;
1844 case S_IFDIR:
24ac23ab 1845 data->rpc_status = -EISDIR;
6f926b5b
TM		 1846 break;
1847 default:
24ac23ab 1848 data->rpc_status = -ENOTDIR;
807d66d8 1849 }
6f926b5b 1850 }
26e976a8 1851 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1852 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1853 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1854 }
3e309914 1855 data->rpc_done = 1;
24ac23ab 1856}
6f926b5b 1857
24ac23ab
TM		 1858static void nfs4_open_release(void *calldata)
1859{
1860 struct nfs4_opendata *data = calldata;
1861 struct nfs4_state *state = NULL;
1862
1863 /* If this request hasn't been cancelled, do nothing */
1864 if (data->cancelled == 0)
1865 goto out_free;
1866 /* In case of error, no cleanup! */
3e309914 1867 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1868 goto out_free;
1869 /* In case we need an open_confirm, no cleanup! */
1870 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1871 goto out_free;
24ac23ab 1872 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1873 if (!IS_ERR(state))
643168c2 1874 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1875out_free:
c6d00e63 1876 nfs4_opendata_put(data);
24ac23ab
TM		 1877}
1878
1879static const struct rpc_call_ops nfs4_open_ops = {
1880 .rpc_call_prepare = nfs4_open_prepare,
1881 .rpc_call_done = nfs4_open_done,
1882 .rpc_release = nfs4_open_release,
1883};
1884
b257957e 1885static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1886{
1887 struct inode *dir = data->dir->d_inode;
1888 struct nfs_server *server = NFS_SERVER(dir);
1889 struct nfs_openargs *o_arg = &data->o_arg;
1890 struct nfs_openres *o_res = &data->o_res;
1891 struct rpc_task *task;
5138fde0
TM		 1892 struct rpc_message msg = {
1893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1894 .rpc_argp = o_arg,
1895 .rpc_resp = o_res,
1896 .rpc_cred = data->owner->so_cred,
1897 };
c970aa85
TM		 1898 struct rpc_task_setup task_setup_data = {
1899 .rpc_client = server->client,
5138fde0 1900 .rpc_message = &msg,
c970aa85
TM		 1901 .callback_ops = &nfs4_open_ops,
1902 .callback_data = data,
101070ca 1903 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1904 .flags = RPC_TASK_ASYNC,
1905 };
24ac23ab
TM		 1906 int status;
1907
a9c92d6b 1908 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1909 kref_get(&data->kref);
3e309914
TM		 1910 data->rpc_done = 0;
1911 data->rpc_status = 0;
2ced46c2 1912 data->cancelled = 0;
bdeca1b7
TM		 1913 data->is_recover = 0;
1914 if (isrecover) {
8fe72bac 1915 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1916 data->is_recover = 1;
1917 }
c970aa85 1918 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1919 if (IS_ERR(task))
1920 return PTR_ERR(task);
1921 status = nfs4_wait_for_completion_rpc_task(task);
1922 if (status != 0) {
1923 data->cancelled = 1;
1924 smp_wmb();
1925 } else
1926 status = data->rpc_status;
1927 rpc_put_task(task);
1928
1929 return status;
1930}
1931
1932static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1933{
1934 struct inode *dir = data->dir->d_inode;
1935 struct nfs_openres *o_res = &data->o_res;
1936 int status;
1937
1938 status = nfs4_run_open_task(data, 1);
1939 if (status != 0 || !data->rpc_done)
1940 return status;
1941
6926afd1
TM		 1942 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1943
b257957e
AB		 1944 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1945 status = _nfs4_proc_open_confirm(data);
1946 if (status != 0)
1947 return status;
1948 }
1949
1950 return status;
1951}
1952
f3792d63
TM		 1953/*
1954 * Additional permission checks in order to distinguish between an
1955 * open for read, and an open for execute. This works around the
1956 * fact that NFSv4 OPEN treats read and execute permissions as being
1957 * the same.
1958 * Note that in the non-execute case, we want to turn off permission
1959 * checking if we just created a new file (POSIX open() semantics).
1960 */
6168f62c
WAA		 1961static int nfs4_opendata_access(struct rpc_cred *cred,
1962 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1963 struct nfs4_state *state, fmode_t fmode,
1964 int openflags)
6168f62c
WAA		 1965{
1966 struct nfs_access_entry cache;
1967 u32 mask;
1968
1969 /* access call failed or for some reason the server doesn't
1970 * support any access modes -- defer access call until later */
1971 if (opendata->o_res.access_supported == 0)
1972 return 0;
1973
1974 mask = 0;
f3792d63
TM		 1975 /*
1976 * Use openflags to check for exec, because fmode won't
1977 * always have FMODE_EXEC set when file open for exec.
1978 */
f8d9a897
WAA		 1979 if (openflags & __FMODE_EXEC) {
1980 /* ONLY check for exec rights */
1981 mask = MAY_EXEC;
f3792d63 1982 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1983 mask = MAY_READ;
6168f62c
WAA		 1984
1985 cache.cred = cred;
1986 cache.jiffies = jiffies;
1987 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1988 nfs_access_add_cache(state->inode, &cache);
1989
bbd3a8ee 1990 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1991 return 0;
1992
1993 /* even though OPEN succeeded, access is denied. Close the file */
1994 nfs4_close_state(state, fmode);
998f40b5 1995 return -EACCES;
6168f62c
WAA		 1996}
1997
b257957e
AB		 1998/*
1999 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2000 */
2001static int _nfs4_proc_open(struct nfs4_opendata *data)
2002{
2003 struct inode *dir = data->dir->d_inode;
2004 struct nfs_server *server = NFS_SERVER(dir);
2005 struct nfs_openargs *o_arg = &data->o_arg;
2006 struct nfs_openres *o_res = &data->o_res;
2007 int status;
2008
2009 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2010 if (!data->rpc_done)
2011 return status;
2012 if (status != 0) {
2013 if (status == -NFS4ERR_BADNAME &&
2014 !(o_arg->open_flags & O_CREAT))
2015 return -ENOENT;
24ac23ab 2016 return status;
08ef7bd3 2017 }
24ac23ab 2018
6926afd1
TM		 2019 nfs_fattr_map_and_free_names(server, &data->f_attr);
2020
5bc2afc2 2021 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2022 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2023 if (o_arg->open_flags & O_EXCL)
2024 data->file_created = 1;
2025 else if (o_res->cinfo.before != o_res->cinfo.after)
2026 data->file_created = 1;
2027 }
0df5dd4a
TM		 2028 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2029 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2030 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2031 status = _nfs4_proc_open_confirm(data);
1da177e4 2032 if (status != 0)
24ac23ab 2033 return status;
1da177e4
LT		 2034 }
2035 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2036 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2037 return 0;
1da177e4
LT		 2038}
2039
d83217c1
AA		 2040static int nfs4_recover_expired_lease(struct nfs_server *server)
2041{
2042 return nfs4_client_recover_expired_lease(server->nfs_client);
2043}
2044
1da177e4
LT		 2045/*
2046 * OPEN_EXPIRED:
2047 * reclaim state on the server after a network partition.
2048 * Assumes caller holds the appropriate lock
2049 */
539cd03a 2050static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2051{
e56e0b78 2052 struct nfs4_opendata *opendata;
864472e9 2053 int ret;
1da177e4 2054
4a1c0893 2055 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2056 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2057 if (IS_ERR(opendata))
2058 return PTR_ERR(opendata);
864472e9 2059 ret = nfs4_open_recover(opendata, state);
35d05778 2060 if (ret == -ESTALE)
3d4ff43d 2061 d_drop(ctx->dentry);
c6d00e63 2062 nfs4_opendata_put(opendata);
864472e9 2063 return ret;
1da177e4
LT		 2064}
2065
a9ed2e25 2066static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2067{
539cd03a 2068 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2069 struct nfs4_exception exception = { };
2070 int err;
2071
2072 do {
539cd03a 2073 err = _nfs4_open_expired(ctx, state);
42113a75 2074 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2075 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2076 continue;
a9ed2e25
TM		 2077 switch (err) {
2078 default:
2079 goto out;
2080 case -NFS4ERR_GRACE:
2081 case -NFS4ERR_DELAY:
2082 nfs4_handle_exception(server, err, &exception);
2083 err = 0;
2084 }
202b50dc 2085 } while (exception.retry);
a9ed2e25 2086out:
202b50dc
TM		 2087 return err;
2088}
2089
1da177e4
LT		 2090static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2091{
1da177e4 2092 struct nfs_open_context *ctx;
864472e9 2093 int ret;
1da177e4 2094
864472e9
TM		 2095 ctx = nfs4_state_find_open_context(state);
2096 if (IS_ERR(ctx))
91876b13 2097 return -EAGAIN;
539cd03a 2098 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2099 put_nfs_open_context(ctx);
2100 return ret;
1da177e4
LT		 2101}
2102
f062eb6c 2103#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2104static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2105{
f062eb6c 2106 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2107 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2108 struct nfs_delegation *delegation;
2109 struct rpc_cred *cred = NULL;
2110 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2111
2112 /* If a state reset has been done, test_stateid is unneeded */
2113 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2114 return;
2115
ab7cb0df
TM		 2116 /* Get the delegation credential for use by test/free_stateid */
2117 rcu_read_lock();
2118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2119 if (delegation != NULL &&
2120 nfs4_stateid_match(&delegation->stateid, stateid)) {
2121 cred = get_rpccred(delegation->cred);
2122 rcu_read_unlock();
2123 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2124 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2125 } else
2126 rcu_read_unlock();
2127
3e60ffdd
CL		 2128 if (status != NFS_OK) {
2129 /* Free the stateid unless the server explicitly
2130 * informs us the stateid is unrecognized. */
2131 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2132 nfs41_free_stateid(server, stateid, cred);
6938867e 2133 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2134
6938867e
BS		 2135 write_seqlock(&state->seqlock);
2136 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2137 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2138 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2139 }
ab7cb0df
TM		 2140
2141 if (cred != NULL)
2142 put_rpccred(cred);
3e60ffdd
CL		 2143}
2144
2145/**
2146 * nfs41_check_open_stateid - possibly free an open stateid
2147 *
2148 * @state: NFSv4 state for an inode
2149 *
2150 * Returns NFS_OK if recovery for this stateid is now finished.
2151 * Otherwise a negative NFS4ERR value is returned.
2152 */
2153static int nfs41_check_open_stateid(struct nfs4_state *state)
2154{
2155 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2156 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2157 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2158 int status;
2159
2160 /* If a state reset has been done, test_stateid is unneeded */
2161 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2162 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2163 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2164 return -NFS4ERR_BAD_STATEID;
2165
ab7cb0df 2166 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2167 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2168 if (status != NFS_OK) {
2169 /* Free the stateid unless the server explicitly
2170 * informs us the stateid is unrecognized. */
2171 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2172 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2173
2174 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2175 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2176 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2177 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2178 }
2179 return status;
2180}
2181
2182static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2183{
eb64cf96 2184 int status;
b01dd1d8 2185
3e60ffdd
CL		 2186 nfs41_clear_delegation_stateid(state);
2187 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2188 if (status != NFS_OK)
2189 status = nfs4_open_expired(sp, state);
2190 return status;
f062eb6c
BS		 2191}
2192#endif
2193
aa53ed54
JL		 2194/*
2195 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2196 * fields corresponding to attributes that were used to store the verifier.
2197 * Make sure we clobber those fields in the later setattr call
2198 */
2199static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2200{
2201 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2202 !(sattr->ia_valid & ATTR_ATIME_SET))
2203 sattr->ia_valid |= ATTR_ATIME;
2204
2205 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2206 !(sattr->ia_valid & ATTR_MTIME_SET))
2207 sattr->ia_valid |= ATTR_MTIME;
2208}
2209
c21443c2
TM		 2210static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2211 fmode_t fmode,
2212 int flags,
3efb9722 2213 struct nfs_open_context *ctx)
c21443c2
TM		 2214{
2215 struct nfs4_state_owner *sp = opendata->owner;
2216 struct nfs_server *server = sp->so_server;
275bb307 2217 struct dentry *dentry;
c21443c2
TM		 2218 struct nfs4_state *state;
2219 unsigned int seq;
2220 int ret;
2221
2222 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2223
2224 ret = _nfs4_proc_open(opendata);
4fa2c54b
N		 2225 if (ret != 0) {
2226 if (ret == -ENOENT) {
2227 d_drop(opendata->dentry);
2228 d_add(opendata->dentry, NULL);
2229 nfs_set_verifier(opendata->dentry,
2230 nfs_save_change_attribute(opendata->dir->d_inode));
2231 }
c21443c2 2232 goto out;
4fa2c54b 2233 }
c21443c2
TM		 2234
2235 state = nfs4_opendata_to_nfs4_state(opendata);
2236 ret = PTR_ERR(state);
2237 if (IS_ERR(state))
2238 goto out;
2239 if (server->caps & NFS_CAP_POSIX_LOCK)
2240 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2241
275bb307
TM		 2242 dentry = opendata->dentry;
2243 if (dentry->d_inode == NULL) {
2244 /* FIXME: Is this d_drop() ever needed? */
2245 d_drop(dentry);
2246 dentry = d_add_unique(dentry, igrab(state->inode));
2247 if (dentry == NULL) {
2248 dentry = opendata->dentry;
2249 } else if (dentry != ctx->dentry) {
2250 dput(ctx->dentry);
2251 ctx->dentry = dget(dentry);
2252 }
2253 nfs_set_verifier(dentry,
2254 nfs_save_change_attribute(opendata->dir->d_inode));
2255 }
2256
c21443c2
TM		 2257 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2258 if (ret != 0)
2259 goto out;
2260
3efb9722 2261 ctx->state = state;
c45ffdd2
TM		 2262 if (dentry->d_inode == state->inode) {
2263 nfs_inode_attach_open_context(ctx);
2264 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2265 nfs4_schedule_stateid_recovery(server, state);
2266 }
c21443c2
TM		 2267out:
2268 return ret;
2269}
2270
1da177e4 2271/*
24ac23ab 2272 * Returns a referenced nfs4_state
1da177e4 2273 */
82be417a 2274static int _nfs4_do_open(struct inode *dir,
4197a055 2275 struct nfs_open_context *ctx,
82be417a
AA		 2276 int flags,
2277 struct iattr *sattr,
5bc2afc2
TM		 2278 struct nfs4_label *label,
2279 int *opened)
1da177e4
LT		 2280{
2281 struct nfs4_state_owner *sp;
2282 struct nfs4_state *state = NULL;
2283 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2284 struct nfs4_opendata *opendata;
4197a055
TM		 2285 struct dentry *dentry = ctx->dentry;
2286 struct rpc_cred *cred = ctx->cred;
2287 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2288 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2289 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2290 struct nfs4_label *olabel = NULL;
aac00a8d 2291 int status;
1da177e4
LT		 2292
2293 /* Protect against reboot recovery conflicts */
1da177e4 2294 status = -ENOMEM;
d1e284d5
TM		 2295 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2296 if (sp == NULL) {
1da177e4
LT		 2297 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2298 goto out_err;
2299 }
58d9714a
TM		 2300 status = nfs4_recover_expired_lease(server);
2301 if (status != 0)
b4454fe1 2302 goto err_put_state_owner;
82a2c1b7
AV		 2303 if (dentry->d_inode != NULL)
2304 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2305 status = -ENOMEM;
49f9a0fa
TM		 2306 if (dentry->d_inode)
2307 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2308 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2309 label, claim, GFP_KERNEL);
e56e0b78 2310 if (opendata == NULL)
95d35cb4 2311 goto err_put_state_owner;
1da177e4 2312
14c43f76
DQ		 2313 if (label) {
2314 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2315 if (IS_ERR(olabel)) {
2316 status = PTR_ERR(olabel);
2317 goto err_opendata_put;
2318 }
2319 }
2320
e911b815
TM		 2321 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2322 if (!opendata->f_attr.mdsthreshold) {
2323 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2324 if (!opendata->f_attr.mdsthreshold)
2325 goto err_free_label;
2326 }
1549210f 2327 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2328 }
82a2c1b7
AV		 2329 if (dentry->d_inode != NULL)
2330 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2331
3efb9722 2332 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2333 if (status != 0)
14c43f76 2334 goto err_free_label;
3efb9722 2335 state = ctx->state;
6168f62c 2336
549b19cc
TM		 2337 if ((opendata->o_arg.open_flags & O_EXCL) &&
2338 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2339 nfs4_exclusive_attrset(opendata, sattr);
2340
2341 nfs_fattr_init(opendata->o_res.f_attr);
2342 status = nfs4_do_setattr(state->inode, cred,
2343 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2344 state, label, olabel);
2345 if (status == 0) {
0ab64e0e 2346 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2347 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2348 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2349 }
0ab64e0e 2350 }
5bc2afc2
TM		 2351 if (opendata->file_created)
2352 *opened |= FILE_CREATED;
82be417a 2353
e911b815 2354 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2355 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2356 opendata->f_attr.mdsthreshold = NULL;
2357 }
82be417a 2358
14c43f76
DQ		 2359 nfs4_label_free(olabel);
2360
c6d00e63 2361 nfs4_opendata_put(opendata);
1da177e4 2362 nfs4_put_state_owner(sp);
1da177e4 2363 return 0;
14c43f76
DQ		 2364err_free_label:
2365 nfs4_label_free(olabel);
c6d00e63
TM		 2366err_opendata_put:
2367 nfs4_opendata_put(opendata);
e56e0b78
TM		 2368err_put_state_owner:
2369 nfs4_put_state_owner(sp);
1da177e4 2370out_err:
1da177e4
LT		 2371 return status;
2372}
2373
2374
82be417a 2375static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2376 struct nfs_open_context *ctx,
82be417a
AA		 2377 int flags,
2378 struct iattr *sattr,
5bc2afc2
TM		 2379 struct nfs4_label *label,
2380 int *opened)
1da177e4 2381{
49f9a0fa 2382 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2383 struct nfs4_exception exception = { };
2384 struct nfs4_state *res;
2385 int status;
2386
2387 do {
5bc2afc2 2388 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2389 res = ctx->state;
42113a75 2390 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2391 if (status == 0)
2392 break;
2393 /* NOTE: BAD_SEQID means the server and client disagree about the
2394 * book-keeping w.r.t. state-changing operations
2395 * (OPEN/CLOSE/LOCK/LOCKU...)
2396 * It is actually a sign of a bug on the client or on the server.
2397 *
2398 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2399 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2400 * have unhashed the old state_owner for us, and that we can
2401 * therefore safely retry using a new one. We should still warn
2402 * the user though...
2403 */
2404 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2405 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2406 " returned a bad sequence-id error!\n",
2407 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2408 exception.retry = 1;
2409 continue;
2410 }
550f5747
TM		 2411 /*
2412 * BAD_STATEID on OPEN means that the server cancelled our
2413 * state before it received the OPEN_CONFIRM.
2414 * Recover by retrying the request as per the discussion
2415 * on Page 181 of RFC3530.
2416 */
2417 if (status == -NFS4ERR_BAD_STATEID) {
2418 exception.retry = 1;
2419 continue;
2420 }
aac00a8d
TM		 2421 if (status == -EAGAIN) {
2422 /* We must have found a delegation */
2423 exception.retry = 1;
2424 continue;
2425 }
49f9a0fa
TM		 2426 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2427 continue;
2428 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2429 status, &exception));
2430 } while (exception.retry);
2431 return res;
2432}
2433
659bfcd6
TM		 2434static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2435 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2436 struct nfs4_state *state, struct nfs4_label *ilabel,
2437 struct nfs4_label *olabel)
1da177e4 2438{
3e4f6290 2439 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2440 struct nfs_setattrargs arg = {
3e4f6290 2441 .fh = NFS_FH(inode),
1da177e4
LT		 2442 .iap = sattr,
2443 .server = server,
2444 .bitmask = server->attr_bitmask,
1775fd3e 2445 .label = ilabel,
1da177e4
LT		 2446 };
2447 struct nfs_setattrres res = {
2448 .fattr = fattr,
1775fd3e 2449 .label = olabel,
1da177e4
LT		 2450 .server = server,
2451 };
2452 struct rpc_message msg = {
659bfcd6
TM		 2453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2454 .rpc_argp = &arg,
2455 .rpc_resp = &res,
2456 .rpc_cred = cred,
1da177e4 2457 };
26e976a8 2458 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2459 fmode_t fmode;
2460 bool truncate;
65e4308d 2461 int status;
1da177e4 2462
aa9c2669
DQ		 2463 arg.bitmask = nfs4_bitmask(server, ilabel);
2464 if (ilabel)
2465 arg.bitmask = nfs4_bitmask(server, olabel);
2466
0e574af1 2467 nfs_fattr_init(fattr);
1da177e4 2468
ee3ae84e
TM		 2469 /* Servers should only apply open mode checks for file size changes */
2470 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2471 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2472
2473 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2474 /* Use that stateid */
0418dae1 2475 } else if (truncate && state != NULL) {
2a369153
TM		 2476 struct nfs_lockowner lockowner = {
2477 .l_owner = current->files,
2478 .l_pid = current->tgid,
2479 };
0418dae1
TM		 2480 if (!nfs4_valid_open_stateid(state))
2481 return -EBADF;
2482 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2483 &lockowner) == -EIO)
2484 return -EBADF;
08e9eac4 2485 } else
f597c537 2486 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2487
7c513058 2488 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2489 if (status == 0 && state != NULL)
2490 renew_lease(server, timestamp);
65e4308d 2491 return status;
1da177e4
LT		 2492}
2493
659bfcd6
TM		 2494static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2495 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2496 struct nfs4_state *state, struct nfs4_label *ilabel,
2497 struct nfs4_label *olabel)
1da177e4 2498{
3e4f6290 2499 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2500 struct nfs4_exception exception = {
2501 .state = state,
3114ea7a 2502 .inode = inode,
a1d0b5ee 2503 };
1da177e4
LT		 2504 int err;
2505 do {
1775fd3e 2506 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2507 trace_nfs4_setattr(inode, err);
451146be
TM		 2508 switch (err) {
2509 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2510 if (!(sattr->ia_valid & ATTR_SIZE)) {
2511 pr_warn_once("NFSv4: server %s is incorrectly "
2512 "applying open mode checks to "
2513 "a SETATTR that is not "
2514 "changing file size.\n",
2515 server->nfs_client->cl_hostname);
2516 }
451146be
TM		 2517 if (state && !(state->state & FMODE_WRITE)) {
2518 err = -EBADF;
2519 if (sattr->ia_valid & ATTR_OPEN)
2520 err = -EACCES;
2521 goto out;
2522 }
2523 }
2524 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2525 } while (exception.retry);
451146be 2526out:
1da177e4
LT		 2527 return err;
2528}
2529
2530struct nfs4_closedata {
2531 struct inode *inode;
2532 struct nfs4_state *state;
2533 struct nfs_closeargs arg;
2534 struct nfs_closeres res;
516a6af6 2535 struct nfs_fattr fattr;
26e976a8 2536 unsigned long timestamp;
f7e8917a
FI		 2537 bool roc;
2538 u32 roc_barrier;
1da177e4
LT		 2539};
2540
963d8fe5 2541static void nfs4_free_closedata(void *data)
9512135d 2542{
963d8fe5
TM		 2543 struct nfs4_closedata *calldata = data;
2544 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2545 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2546
f7e8917a
FI		 2547 if (calldata->roc)
2548 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2549 nfs4_put_open_state(calldata->state);
2550 nfs_free_seqid(calldata->arg.seqid);
9512135d 2551 nfs4_put_state_owner(sp);
322b2b90 2552 nfs_sb_deactive(sb);
9512135d
TM		 2553 kfree(calldata);
2554}
2555
963d8fe5 2556static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2557{
963d8fe5 2558 struct nfs4_closedata *calldata = data;
1da177e4 2559 struct nfs4_state *state = calldata->state;
1da177e4 2560 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2561 nfs4_stateid *res_stateid = NULL;
1da177e4 2562
a3ca5651 2563 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2564 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2565 return;
42113a75 2566 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2567 /* hmm. we are done with the inode, and in the process of freeing
2568 * the state_owner. we keep this around to process errors
2569 */
1da177e4
LT		 2570 switch (task->tk_status) {
2571 case 0:
412f6c4c
TM		 2572 res_stateid = &calldata->res.stateid;
2573 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2574 pnfs_roc_set_barrier(state->inode,
2575 calldata->roc_barrier);
26e976a8 2576 renew_lease(server, calldata->timestamp);
412f6c4c 2577 break;
69794ad7 2578 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2579 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2580 case -NFS4ERR_OLD_STATEID:
2581 case -NFS4ERR_BAD_STATEID:
1da177e4 2582 case -NFS4ERR_EXPIRED:
dc0b027d 2583 if (calldata->arg.fmode == 0)
9e33bed5 2584 break;
1da177e4 2585 default:
69794ad7 2586 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2587 rpc_restart_call_prepare(task);
69794ad7
TM		 2588 goto out_release;
2589 }
1da177e4 2590 }
412f6c4c 2591 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2592out_release:
72211dbe 2593 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2594 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2595 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2596}
2597
4ce70ada 2598static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2599{
4ce70ada 2600 struct nfs4_closedata *calldata = data;
9512135d 2601 struct nfs4_state *state = calldata->state;
7fdab069 2602 struct inode *inode = calldata->inode;
aee7af35 2603 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2604 int call_close = 0;
9512135d 2605
a3ca5651 2606 dprintk("%s: begin!\n", __func__);
963d8fe5 2607 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2608 goto out_wait;
003707c7 2609
88069f77 2610 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2611 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2612 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2613 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2614 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2615 /* Calculate the current open share mode */
2616 calldata->arg.fmode = 0;
2617 if (is_rdonly || is_rdwr)
2618 calldata->arg.fmode |= FMODE_READ;
2619 if (is_wronly || is_rdwr)
2620 calldata->arg.fmode |= FMODE_WRITE;
003707c7 2621 /* Calculate the change in open mode */
e7616923 2622 if (state->n_rdwr == 0) {
003707c7 2623 if (state->n_rdonly == 0) {
aee7af35 2624 call_close |= is_rdonly || is_rdwr;
88069f77 2625 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2626 }
2627 if (state->n_wronly == 0) {
aee7af35 2628 call_close |= is_wronly || is_rdwr;
88069f77 2629 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2630 }
e7616923 2631 }
5d422301
TM		 2632 if (!nfs4_valid_open_stateid(state))
2633 call_close = 0;
4cecb76f 2634 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2635
2636 if (!call_close) {
963d8fe5 2637 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2638 goto out_no_action;
9512135d 2639 }
88069f77 2640
f7e8917a 2641 if (calldata->arg.fmode == 0) {
88069f77 2642 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2643 if (calldata->roc &&
b9536ad5
AA		 2644 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2645 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2646 goto out_wait;
b9536ad5 2647 }
f7e8917a 2648 }
88069f77 2649
516a6af6 2650 nfs_fattr_init(calldata->res.fattr);
26e976a8 2651 calldata->timestamp = jiffies;
7fdab069 2652 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2653 &calldata->arg.seq_args,
2654 &calldata->res.seq_res,
2240a9e2
TM		 2655 task) != 0)
2656 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2657 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2658 return;
2659out_no_action:
2660 task->tk_action = NULL;
2661out_wait:
2662 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2663}
2664
963d8fe5 2665static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2666 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2667 .rpc_call_done = nfs4_close_done,
2668 .rpc_release = nfs4_free_closedata,
2669};
2670
fe08c546
PT		 2671static bool nfs4_state_has_opener(struct nfs4_state *state)
2672{
2673 /* first check existing openers */
2674 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2675 state->n_rdonly != 0)
2676 return true;
2677
2678 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2679 state->n_wronly != 0)
2680 return true;
2681
2682 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2683 state->n_rdwr != 0)
2684 return true;
2685
2686 return false;
2687}
2688
2689static bool nfs4_roc(struct inode *inode)
2690{
2691 struct nfs_inode *nfsi = NFS_I(inode);
2692 struct nfs_open_context *ctx;
2693 struct nfs4_state *state;
2694
2695 spin_lock(&inode->i_lock);
2696 list_for_each_entry(ctx, &nfsi->open_files, list) {
2697 state = ctx->state;
2698 if (state == NULL)
2699 continue;
2700 if (nfs4_state_has_opener(state)) {
2701 spin_unlock(&inode->i_lock);
2702 return false;
2703 }
2704 }
2705 spin_unlock(&inode->i_lock);
2706
2707 if (nfs4_check_delegation(inode, FMODE_READ))
2708 return false;
2709
2710 return pnfs_roc(inode);
2711}
2712
1da177e4
LT		 2713/*
2714 * It is possible for data to be read/written from a mem-mapped file
2715 * after the sys_close call (which hits the vfs layer as a flush).
2716 * This means that we can't safely call nfsv4 close on a file until
2717 * the inode is cleared. This in turn means that we are not good
2718 * NFSv4 citizens - we do not indicate to the server to update the file's
2719 * share state even when we are done with one of the three share
2720 * stateid's in the inode.
2721 *
2722 * NOTE: Caller must be holding the sp->so_owner semaphore!
2723 */
1f7977c1 2724int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2725{
4a35bd41 2726 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2727 struct nfs4_closedata *calldata;
b39e625b
TM		 2728 struct nfs4_state_owner *sp = state->owner;
2729 struct rpc_task *task;
5138fde0
TM		 2730 struct rpc_message msg = {
2731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2732 .rpc_cred = state->owner->so_cred,
2733 };
c970aa85
TM		 2734 struct rpc_task_setup task_setup_data = {
2735 .rpc_client = server->client,
5138fde0 2736 .rpc_message = &msg,
c970aa85 2737 .callback_ops = &nfs4_close_ops,
101070ca 2738 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2739 .flags = RPC_TASK_ASYNC,
2740 };
9512135d 2741 int status = -ENOMEM;
1da177e4 2742
fa940720
WAA		 2743 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2744 &task_setup_data.rpc_client, &msg);
2745
8535b2be 2746 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2747 if (calldata == NULL)
9512135d 2748 goto out;
a9c92d6b 2749 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2750 calldata->inode = state->inode;
1da177e4 2751 calldata->state = state;
4a35bd41 2752 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2753 calldata->arg.stateid = &state->open_stateid;
1da177e4 2754 /* Serialization for the sequence id */
8535b2be 2755 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2756 if (calldata->arg.seqid == NULL)
2757 goto out_free_calldata;
dc0b027d 2758 calldata->arg.fmode = 0;
a65318bf 2759 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2760 calldata->res.fattr = &calldata->fattr;
c1d51931 2761 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2762 calldata->res.server = server;
fe08c546 2763 calldata->roc = nfs4_roc(state->inode);
643168c2 2764 nfs_sb_active(calldata->inode->i_sb);
9512135d 2765
1174dd1f
TM		 2766 msg.rpc_argp = &calldata->arg;
2767 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2768 task_setup_data.callback_data = calldata;
2769 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2770 if (IS_ERR(task))
2771 return PTR_ERR(task);
a49c3c77
TM		 2772 status = 0;
2773 if (wait)
2774 status = rpc_wait_for_completion_task(task);
b39e625b 2775 rpc_put_task(task);
a49c3c77 2776 return status;
9512135d
TM		 2777out_free_calldata:
2778 kfree(calldata);
2779out:
b39e625b
TM		 2780 nfs4_put_open_state(state);
2781 nfs4_put_state_owner(sp);
9512135d 2782 return status;
1da177e4
LT		 2783}
2784
2b484297 2785static struct inode *
5bc2afc2
TM		 2786nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2787 int open_flags, struct iattr *attr, int *opened)
1da177e4 2788{
1da177e4 2789 struct nfs4_state *state;
aa9c2669
DQ		 2790 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2791
2792 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2793
565277f6 2794 /* Protect against concurrent sillydeletes */
5bc2afc2 2795 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2796
2797 nfs4_label_release_security(label);
2798
f46e0bd3
TM		 2799 if (IS_ERR(state))
2800 return ERR_CAST(state);
275bb307 2801 return state->inode;
1da177e4
LT		 2802}
2803
1185a552 2804static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2805{
2806 if (ctx->state == NULL)
2807 return;
2808 if (is_sync)
643168c2 2809 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2810 else
643168c2 2811 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2812}
1da177e4 2813
b944dba3
TM		 2814#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2815#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2816#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2817
1da177e4
LT		 2818static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2819{
43652ad5
BH		 2820 struct nfs4_server_caps_arg args = {
2821 .fhandle = fhandle,
2822 };
1da177e4
LT		 2823 struct nfs4_server_caps_res res = {};
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2826 .rpc_argp = &args,
1da177e4
LT		 2827 .rpc_resp = &res,
2828 };
2829 int status;
2830
7c513058 2831 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2832 if (status == 0) {
b944dba3
TM		 2833 /* Sanity check the server answers */
2834 switch (server->nfs_client->cl_minorversion) {
2835 case 0:
2836 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2837 res.attr_bitmask[2] = 0;
2838 break;
2839 case 1:
2840 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2841 break;
2842 case 2:
2843 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2844 }
1da177e4 2845 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2846 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2847 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2848 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2849 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2850 NFS_CAP_CTIME|NFS_CAP_MTIME|
2851 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2852 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2853 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2854 server->caps |= NFS_CAP_ACLS;
2855 if (res.has_links != 0)
2856 server->caps |= NFS_CAP_HARDLINKS;
2857 if (res.has_symlinks != 0)
2858 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2859 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2860 server->caps |= NFS_CAP_FILEID;
2861 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2862 server->caps |= NFS_CAP_MODE;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2864 server->caps |= NFS_CAP_NLINK;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2866 server->caps |= NFS_CAP_OWNER;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2868 server->caps |= NFS_CAP_OWNER_GROUP;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2870 server->caps |= NFS_CAP_ATIME;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2872 server->caps |= NFS_CAP_CTIME;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2874 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2875#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2876 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2877 server->caps |= NFS_CAP_SECURITY_LABEL;
2878#endif
2879 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2880 sizeof(server->attr_bitmask));
b944dba3 2881 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2882
a65318bf
TM		 2883 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2884 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2885 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2886 server->cache_consistency_bitmask[2] = 0;
1da177e4 2887 server->acl_bitmask = res.acl_bitmask;
264e6351 2888 server->fh_expire_type = res.fh_expire_type;
1da177e4 2889 }
cccef3b9 2890
1da177e4
LT		 2891 return status;
2892}
2893
55a97593 2894int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2895{
2896 struct nfs4_exception exception = { };
2897 int err;
2898 do {
2899 err = nfs4_handle_exception(server,
2900 _nfs4_server_capabilities(server, fhandle),
2901 &exception);
2902 } while (exception.retry);
2903 return err;
2904}
2905
2906static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2907 struct nfs_fsinfo *info)
2908{
aa9c2669 2909 u32 bitmask[3];
1da177e4 2910 struct nfs4_lookup_root_arg args = {
aa9c2669 2911 .bitmask = bitmask,
1da177e4
LT		 2912 };
2913 struct nfs4_lookup_res res = {
2914 .server = server,
0e574af1 2915 .fattr = info->fattr,
1da177e4
LT		 2916 .fh = fhandle,
2917 };
2918 struct rpc_message msg = {
2919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2920 .rpc_argp = &args,
2921 .rpc_resp = &res,
2922 };
008f55d0 2923
aa9c2669
DQ		 2924 bitmask[0] = nfs4_fattr_bitmap[0];
2925 bitmask[1] = nfs4_fattr_bitmap[1];
2926 /*
2927 * Process the label in the upcoming getfattr
2928 */
2929 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2930
0e574af1 2931 nfs_fattr_init(info->fattr);
7c513058 2932 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2933}
2934
2935static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2936 struct nfs_fsinfo *info)
2937{
2938 struct nfs4_exception exception = { };
2939 int err;
2940 do {
fb8a5ba8 2941 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2942 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2943 switch (err) {
2944 case 0:
2945 case -NFS4ERR_WRONGSEC:
05e9cfb4 2946 goto out;
fb8a5ba8
BS		 2947 default:
2948 err = nfs4_handle_exception(server, err, &exception);
2949 }
1da177e4 2950 } while (exception.retry);
05e9cfb4 2951out:
1da177e4
LT		 2952 return err;
2953}
2954
8f70e95f
BS		 2955static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2957{
c2190661
TM		 2958 struct rpc_auth_create_args auth_args = {
2959 .pseudoflavor = flavor,
2960 };
8f70e95f
BS		 2961 struct rpc_auth *auth;
2962 int ret;
2963
c2190661 2964 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2965 if (IS_ERR(auth)) {
75bc8821 2966 ret = -EACCES;
8f70e95f
BS		 2967 goto out;
2968 }
2969 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2970out:
2971 return ret;
2972}
2973
9a744ba3
CL		 2974/*
2975 * Retry pseudoroot lookup with various security flavors. We do this when:
2976 *
2977 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2978 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2979 *
2980 * Returns zero on success, or a negative NFS4ERR value, or a
2981 * negative errno value.
2982 */
801a16dc 2983static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2984 struct nfs_fsinfo *info)
1da177e4 2985{
9a744ba3
CL		 2986 /* Per 3530bis 15.33.5 */
2987 static const rpc_authflavor_t flav_array[] = {
2988 RPC_AUTH_GSS_KRB5P,
2989 RPC_AUTH_GSS_KRB5I,
2990 RPC_AUTH_GSS_KRB5,
c4eafe11 2991 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2992 RPC_AUTH_NULL,
2993 };
2994 int status = -EPERM;
2995 size_t i;
6a1a1e34 2996
4d4b69dd
WAA		 2997 if (server->auth_info.flavor_len > 0) {
2998 /* try each flavor specified by user */
2999 for (i = 0; i < server->auth_info.flavor_len; i++) {
3000 status = nfs4_lookup_root_sec(server, fhandle, info,
3001 server->auth_info.flavors[i]);
3002 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3003 continue;
3004 break;
3005 }
3006 } else {
3007 /* no flavors specified by user, try default list */
3008 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3009 status = nfs4_lookup_root_sec(server, fhandle, info,
3010 flav_array[i]);
3011 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3012 continue;
3013 break;
3014 }
8f70e95f 3015 }
9a744ba3 3016
fb8a5ba8
BS		 3017 /*
3018 * -EACCESS could mean that the user doesn't have correct permissions
3019 * to access the mount. It could also mean that we tried to mount
3020 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3021 * existing mount programs don't handle -EACCES very well so it should
3022 * be mapped to -EPERM instead.
3023 */
3024 if (status == -EACCES)
3025 status = -EPERM;
801a16dc
BS		 3026 return status;
3027}
3028
2ed4b95b
CL		 3029static int nfs4_do_find_root_sec(struct nfs_server *server,
3030 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3031{
3032 int mv = server->nfs_client->cl_minorversion;
3033 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3034}
3035
3036/**
3037 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3038 * @server: initialized nfs_server handle
3039 * @fhandle: we fill in the pseudo-fs root file handle
3040 * @info: we fill in an FSINFO struct
5e6b1990 3041 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3042 *
3043 * Returns zero on success, or a negative errno.
801a16dc 3044 */
3028eb2b 3045int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3046 struct nfs_fsinfo *info,
3047 bool auth_probe)
801a16dc 3048{
2ed4b95b
CL		 3049 int status;
3050
5e6b1990
TM		 3051 switch (auth_probe) {
3052 case false:
3053 status = nfs4_lookup_root(server, fhandle, info);
3054 if (status != -NFS4ERR_WRONGSEC)
3055 break;
5e6b1990 3056 default:
2ed4b95b 3057 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3058 }
2ed4b95b 3059
1da177e4
LT		 3060 if (status == 0)
3061 status = nfs4_server_capabilities(server, fhandle);
3062 if (status == 0)
3063 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3064
c12e87f4 3065 return nfs4_map_errors(status);
1da177e4
LT		 3066}
3067
bae36241
BS		 3068static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3069 struct nfs_fsinfo *info)
3070{
3071 int error;
3072 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3073 struct nfs4_label *label = NULL;
bae36241
BS		 3074
3075 error = nfs4_server_capabilities(server, mntfh);
3076 if (error < 0) {
3077 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3078 return error;
3079 }
3080
14c43f76
DQ		 3081 label = nfs4_label_alloc(server, GFP_KERNEL);
3082 if (IS_ERR(label))
3083 return PTR_ERR(label);
3084
1775fd3e 3085 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3086 if (error < 0) {
3087 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3088 goto err_free_label;
bae36241
BS		 3089 }
3090
3091 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3092 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3093 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3094
14c43f76
DQ		 3095err_free_label:
3096 nfs4_label_free(label);
3097
bae36241
BS		 3098 return error;
3099}
3100
6b97fd3d
MN		 3101/*
3102 * Get locations and (maybe) other attributes of a referral.
3103 * Note that we'll actually follow the referral later when
3104 * we detect fsid mismatch in inode revalidation
3105 */
f05d147f
BS		 3106static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3107 const struct qstr *name, struct nfs_fattr *fattr,
3108 struct nfs_fh *fhandle)
6b97fd3d
MN		 3109{
3110 int status = -ENOMEM;
3111 struct page *page = NULL;
3112 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3113
3114 page = alloc_page(GFP_KERNEL);
3115 if (page == NULL)
3116 goto out;
3117 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3118 if (locations == NULL)
3119 goto out;
3120
f05d147f 3121 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3122 if (status != 0)
3123 goto out;
519ae255
CL		 3124
3125 /*
3126 * If the fsid didn't change, this is a migration event, not a
3127 * referral. Cause us to drop into the exception handler, which
3128 * will kick off migration recovery.
3129 */
6b97fd3d 3130 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3131 dprintk("%s: server did not return a different fsid for"
3132 " a referral at %s\n", __func__, name->name);
519ae255 3133 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3134 goto out;
3135 }
533eb461
AA		 3136 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3137 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3138
533eb461 3139 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3140 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3141 memset(fhandle, 0, sizeof(struct nfs_fh));
3142out:
3143 if (page)
3144 __free_page(page);
5d7ca35a 3145 kfree(locations);
6b97fd3d
MN		 3146 return status;
3147}
3148
1775fd3e
DQ		 3149static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3150 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3151{
3152 struct nfs4_getattr_arg args = {
3153 .fh = fhandle,
3154 .bitmask = server->attr_bitmask,
3155 };
3156 struct nfs4_getattr_res res = {
3157 .fattr = fattr,
1775fd3e 3158 .label = label,
1da177e4
LT		 3159 .server = server,
3160 };
3161 struct rpc_message msg = {
3162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3163 .rpc_argp = &args,
3164 .rpc_resp = &res,
3165 };
aa9c2669
DQ		 3166
3167 args.bitmask = nfs4_bitmask(server, label);
3168
0e574af1 3169 nfs_fattr_init(fattr);
7c513058 3170 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3171}
3172
1775fd3e
DQ		 3173static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3174 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3175{
3176 struct nfs4_exception exception = { };
3177 int err;
3178 do {
b5f875a9
TM		 3179 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3180 trace_nfs4_getattr(server, fhandle, fattr, err);
3181 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3182 &exception);
3183 } while (exception.retry);
3184 return err;
3185}
3186
3187/*
3188 * The file is not closed if it is opened due to the a request to change
3189 * the size of the file. The open call will not be needed once the
3190 * VFS layer lookup-intents are implemented.
3191 *
3192 * Close is called when the inode is destroyed.
3193 * If we haven't opened the file for O_WRONLY, we
3194 * need to in the size_change case to obtain a stateid.
3195 *
3196 * Got race?
3197 * Because OPEN is always done by name in nfsv4, it is
3198 * possible that we opened a different file by the same
3199 * name. We can recognize this race condition, but we
3200 * can't do anything about it besides returning an error.
3201 *
3202 * This will be fixed with VFS changes (lookup-intent).
3203 */
3204static int
3205nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3206 struct iattr *sattr)
3207{
08e9eac4 3208 struct inode *inode = dentry->d_inode;
659bfcd6 3209 struct rpc_cred *cred = NULL;
d530838b 3210 struct nfs4_state *state = NULL;
14c43f76 3211 struct nfs4_label *label = NULL;
1da177e4
LT		 3212 int status;
3213
8a1636c4 3214 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3215 pnfs_commit_and_return_layout(inode);
8a1636c4 3216
0e574af1 3217 nfs_fattr_init(fattr);
1da177e4 3218
2669940d
AA		 3219 /* Deal with open(O_TRUNC) */
3220 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3221 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3222
3223 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3224 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3225 return 0;
3226
d530838b 3227 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3228 if (sattr->ia_valid & ATTR_FILE) {
3229 struct nfs_open_context *ctx;
3230
3231 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3232 if (ctx) {
3233 cred = ctx->cred;
3234 state = ctx->state;
3235 }
659bfcd6 3236 }
08e9eac4 3237
14c43f76
DQ		 3238 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3239 if (IS_ERR(label))
3240 return PTR_ERR(label);
3241
3242 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3243 if (status == 0) {
65e4308d 3244 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3245 nfs_setsecurity(inode, fattr, label);
3246 }
14c43f76 3247 nfs4_label_free(label);
1da177e4
LT		 3248 return status;
3249}
3250
0c2e53f1
TM		 3251static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3252 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3253 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3254{
0c2e53f1 3255 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3256 int status;
3257 struct nfs4_lookup_arg args = {
3258 .bitmask = server->attr_bitmask,
0c2e53f1 3259 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3260 .name = name,
3261 };
3262 struct nfs4_lookup_res res = {
3263 .server = server,
3264 .fattr = fattr,
aa9c2669 3265 .label = label,
2b3de441
DH		 3266 .fh = fhandle,
3267 };
3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3270 .rpc_argp = &args,
3271 .rpc_resp = &res,
3272 };
3273
aa9c2669
DQ		 3274 args.bitmask = nfs4_bitmask(server, label);
3275
2b3de441
DH		 3276 nfs_fattr_init(fattr);
3277
1da177e4 3278 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3279 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3280 dprintk("NFS reply lookup: %d\n", status);
3281 return status;
3282}
3283
72de53ec 3284static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3285{
7ebb9315 3286 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3287 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3288 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3289 fattr->nlink = 2;
3290}
3291
72de53ec
BS		 3292static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3293 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3294 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3295{
3296 struct nfs4_exception exception = { };
72de53ec 3297 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3298 int err;
3299 do {
1775fd3e 3300 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3301 trace_nfs4_lookup(dir, name, err);
72de53ec 3302 switch (err) {
08ef7bd3 3303 case -NFS4ERR_BADNAME:
72de53ec
BS		 3304 err = -ENOENT;
3305 goto out;
0c2e53f1 3306 case -NFS4ERR_MOVED:
f05d147f 3307 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3308 goto out;
0c2e53f1 3309 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3310 err = -EPERM;
3311 if (client != *clnt)
3312 goto out;
66b06860 3313 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3314 if (IS_ERR(client))
3315 return PTR_ERR(client);
3316
3317 exception.retry = 1;
3318 break;
3319 default:
3320 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3321 }
1da177e4 3322 } while (exception.retry);
72de53ec
BS		 3323
3324out:
3325 if (err == 0)
3326 *clnt = client;
3327 else if (client != *clnt)
3328 rpc_shutdown_client(client);
3329
1da177e4
LT		 3330 return err;
3331}
3332
80a16b21 3333static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3334 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3335 struct nfs4_label *label)
72de53ec
BS		 3336{
3337 int status;
3338 struct rpc_clnt *client = NFS_CLIENT(dir);
3339
1775fd3e 3340 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3341 if (client != NFS_CLIENT(dir)) {
3342 rpc_shutdown_client(client);
3343 nfs_fixup_secinfo_attributes(fattr);
3344 }
3345 return status;
3346}
3347
f05d147f
BS		 3348struct rpc_clnt *
3349nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3350 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3351{
b72888cb 3352 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3353 int status;
f05d147f 3354
1775fd3e 3355 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3356 if (status < 0)
f05d147f 3357 return ERR_PTR(status);
b72888cb 3358 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3359}
3360
1da177e4
LT		 3361static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3362{
76b32999 3363 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3364 struct nfs4_accessargs args = {
3365 .fh = NFS_FH(inode),
a4980e78 3366 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3367 };
3368 struct nfs4_accessres res = {
3369 .server = server,
1da177e4 3370 };
1da177e4
LT		 3371 struct rpc_message msg = {
3372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3373 .rpc_argp = &args,
3374 .rpc_resp = &res,
3375 .rpc_cred = entry->cred,
3376 };
3377 int mode = entry->mask;
aa9c2669 3378 int status = 0;
1da177e4
LT		 3379
3380 /*
3381 * Determine which access bits we want to ask for...
3382 */
3383 if (mode & MAY_READ)
3384 args.access |= NFS4_ACCESS_READ;
3385 if (S_ISDIR(inode->i_mode)) {
3386 if (mode & MAY_WRITE)
3387 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3388 if (mode & MAY_EXEC)
3389 args.access |= NFS4_ACCESS_LOOKUP;
3390 } else {
3391 if (mode & MAY_WRITE)
3392 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3393 if (mode & MAY_EXEC)
3394 args.access |= NFS4_ACCESS_EXECUTE;
3395 }
c407d41a
TM		 3396
3397 res.fattr = nfs_alloc_fattr();
3398 if (res.fattr == NULL)
3399 return -ENOMEM;
3400
7c513058 3401 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3402 if (!status) {
6168f62c 3403 nfs_access_set_mask(entry, res.access);
c407d41a 3404 nfs_refresh_inode(inode, res.fattr);
1da177e4 3405 }
c407d41a 3406 nfs_free_fattr(res.fattr);
1da177e4
LT		 3407 return status;
3408}
3409
3410static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3411{
3412 struct nfs4_exception exception = { };
3413 int err;
3414 do {
c1578b76
TM		 3415 err = _nfs4_proc_access(inode, entry);
3416 trace_nfs4_access(inode, err);
3417 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3418 &exception);
3419 } while (exception.retry);
3420 return err;
3421}
3422
3423/*
3424 * TODO: For the time being, we don't try to get any attributes
3425 * along with any of the zero-copy operations READ, READDIR,
3426 * READLINK, WRITE.
3427 *
3428 * In the case of the first three, we want to put the GETATTR
3429 * after the read-type operation -- this is because it is hard
3430 * to predict the length of a GETATTR response in v4, and thus
3431 * align the READ data correctly. This means that the GETATTR
3432 * may end up partially falling into the page cache, and we should
3433 * shift it into the 'tail' of the xdr_buf before processing.
3434 * To do this efficiently, we need to know the total length
3435 * of data received, which doesn't seem to be available outside
3436 * of the RPC layer.
3437 *
3438 * In the case of WRITE, we also want to put the GETATTR after
3439 * the operation -- in this case because we want to make sure
140150db 3440 * we get the post-operation mtime and size.
1da177e4
LT		 3441 *
3442 * Both of these changes to the XDR layer would in fact be quite
3443 * minor, but I decided to leave them for a subsequent patch.
3444 */
3445static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3446 unsigned int pgbase, unsigned int pglen)
3447{
3448 struct nfs4_readlink args = {
3449 .fh = NFS_FH(inode),
3450 .pgbase = pgbase,
3451 .pglen = pglen,
3452 .pages = &page,
3453 };
f50c7000 3454 struct nfs4_readlink_res res;
1da177e4
LT		 3455 struct rpc_message msg = {
3456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3457 .rpc_argp = &args,
f50c7000 3458 .rpc_resp = &res,
1da177e4
LT		 3459 };
3460
7c513058 3461 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3462}
3463
3464static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3465 unsigned int pgbase, unsigned int pglen)
3466{
3467 struct nfs4_exception exception = { };
3468 int err;
3469 do {
c1578b76
TM		 3470 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3471 trace_nfs4_readlink(inode, err);
3472 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3473 &exception);
3474 } while (exception.retry);
3475 return err;
3476}
3477
1da177e4 3478/*
8867fe58 3479 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3480 */
1da177e4
LT		 3481static int
3482nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3483 int flags)
1da177e4 3484{
aa9c2669 3485 struct nfs4_label l, *ilabel = NULL;
8867fe58 3486 struct nfs_open_context *ctx;
1da177e4 3487 struct nfs4_state *state;
5bc2afc2 3488 int opened = 0;
1da177e4
LT		 3489 int status = 0;
3490
8867fe58
MS		 3491 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3492 if (IS_ERR(ctx))
3493 return PTR_ERR(ctx);
3494
aa9c2669
DQ		 3495 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3496
a8a5da99 3497 sattr->ia_mode &= ~current_umask();
5bc2afc2 3498 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3499 if (IS_ERR(state)) {
3500 status = PTR_ERR(state);
c0204fd2 3501 goto out;
1da177e4 3502 }
1da177e4 3503out:
aa9c2669 3504 nfs4_label_release_security(ilabel);
8867fe58 3505 put_nfs_open_context(ctx);
1da177e4
LT		 3506 return status;
3507}
3508
3509static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3510{
16e42959 3511 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3512 struct nfs_removeargs args = {
1da177e4 3513 .fh = NFS_FH(dir),
26fe5750 3514 .name = *name,
16e42959 3515 };
4fdc17b2 3516 struct nfs_removeres res = {
16e42959 3517 .server = server,
1da177e4 3518 };
1da177e4 3519 struct rpc_message msg = {
4fdc17b2
TM		 3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3521 .rpc_argp = &args,
3522 .rpc_resp = &res,
1da177e4 3523 };
778d2817 3524 int status;
1da177e4 3525
7c513058 3526 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3527 if (status == 0)
16e42959 3528 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3529 return status;
3530}
3531
3532static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3533{
3534 struct nfs4_exception exception = { };
3535 int err;
3536 do {
078ea3df
TM		 3537 err = _nfs4_proc_remove(dir, name);
3538 trace_nfs4_remove(dir, name, err);
3539 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3540 &exception);
3541 } while (exception.retry);
3542 return err;
3543}
3544
e4eff1a6 3545static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3546{
e4eff1a6
TM		 3547 struct nfs_server *server = NFS_SERVER(dir);
3548 struct nfs_removeargs *args = msg->rpc_argp;
3549 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3550
e4eff1a6 3551 res->server = server;
1da177e4 3552 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3553 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3554
3555 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3556}
3557
34e137cc
BS		 3558static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3559{
d9afbd1b
TM		 3560 nfs4_setup_sequence(NFS_SERVER(data->dir),
3561 &data->args.seq_args,
3562 &data->res.seq_res,
3563 task);
1da177e4
LT		 3564}
3565
e4eff1a6 3566static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3567{
078ea3df
TM		 3568 struct nfs_unlinkdata *data = task->tk_calldata;
3569 struct nfs_removeres *res = &data->res;
e4eff1a6 3570
14516c3a
TM		 3571 if (!nfs4_sequence_done(task, &res->seq_res))
3572 return 0;
9e33bed5 3573 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3574 return 0;
3575 update_changeattr(dir, &res->cinfo);
e4eff1a6 3576 return 1;
1da177e4
LT		 3577}
3578
d3d4152a
JL		 3579static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3580{
3581 struct nfs_server *server = NFS_SERVER(dir);
3582 struct nfs_renameargs *arg = msg->rpc_argp;
3583 struct nfs_renameres *res = msg->rpc_resp;
3584
3585 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3586 res->server = server;
a9c92d6b 3587 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3588}
3589
c6bfa1a1
BS		 3590static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3591{
d9afbd1b
TM		 3592 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3593 &data->args.seq_args,
3594 &data->res.seq_res,
3595 task);
d3d4152a
JL		 3596}
3597
3598static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3599 struct inode *new_dir)
3600{
fbc6f7c2
TM		 3601 struct nfs_renamedata *data = task->tk_calldata;
3602 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3603
3604 if (!nfs4_sequence_done(task, &res->seq_res))
3605 return 0;
3606 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3607 return 0;
3608
3609 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3610 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3611 return 1;
3612}
3613
1da177e4
LT		 3614static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3615{
91ba2eee 3616 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3617 struct nfs4_link_arg arg = {
3618 .fh = NFS_FH(inode),
3619 .dir_fh = NFS_FH(dir),
3620 .name = name,
91ba2eee
TM		 3621 .bitmask = server->attr_bitmask,
3622 };
91ba2eee
TM		 3623 struct nfs4_link_res res = {
3624 .server = server,
1775fd3e 3625 .label = NULL,
1da177e4 3626 };
1da177e4
LT		 3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3629 .rpc_argp = &arg,
91ba2eee 3630 .rpc_resp = &res,
1da177e4 3631 };
136f2627
TM		 3632 int status = -ENOMEM;
3633
3634 res.fattr = nfs_alloc_fattr();
778d2817 3635 if (res.fattr == NULL)
136f2627 3636 goto out;
1da177e4 3637
14c43f76
DQ		 3638 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3639 if (IS_ERR(res.label)) {
3640 status = PTR_ERR(res.label);
3641 goto out;
3642 }
aa9c2669 3643 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3644
7c513058 3645 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3646 if (!status) {
3647 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3648 status = nfs_post_op_update_inode(inode, res.fattr);
3649 if (!status)
3650 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3651 }
14c43f76
DQ		 3652
3653
3654 nfs4_label_free(res.label);
3655
136f2627 3656out:
136f2627 3657 nfs_free_fattr(res.fattr);
1da177e4
LT		 3658 return status;
3659}
3660
3661static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3662{
3663 struct nfs4_exception exception = { };
3664 int err;
3665 do {
3666 err = nfs4_handle_exception(NFS_SERVER(inode),
3667 _nfs4_proc_link(inode, dir, name),
3668 &exception);
3669 } while (exception.retry);
3670 return err;
3671}
3672
57dc9a57
TM		 3673struct nfs4_createdata {
3674 struct rpc_message msg;
3675 struct nfs4_create_arg arg;
3676 struct nfs4_create_res res;
3677 struct nfs_fh fh;
3678 struct nfs_fattr fattr;
1775fd3e 3679 struct nfs4_label *label;
57dc9a57
TM		 3680};
3681
3682static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3683 struct qstr *name, struct iattr *sattr, u32 ftype)
3684{
3685 struct nfs4_createdata *data;
3686
3687 data = kzalloc(sizeof(*data), GFP_KERNEL);
3688 if (data != NULL) {
3689 struct nfs_server *server = NFS_SERVER(dir);
3690
14c43f76
DQ		 3691 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3692 if (IS_ERR(data->label))
3693 goto out_free;
3694
57dc9a57
TM		 3695 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3696 data->msg.rpc_argp = &data->arg;
3697 data->msg.rpc_resp = &data->res;
3698 data->arg.dir_fh = NFS_FH(dir);
3699 data->arg.server = server;
3700 data->arg.name = name;
3701 data->arg.attrs = sattr;
3702 data->arg.ftype = ftype;
aa9c2669 3703 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3704 data->res.server = server;
3705 data->res.fh = &data->fh;
3706 data->res.fattr = &data->fattr;
1775fd3e 3707 data->res.label = data->label;
57dc9a57 3708 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3709 }
3710 return data;
14c43f76
DQ		 3711out_free:
3712 kfree(data);
3713 return NULL;
57dc9a57
TM		 3714}
3715
3716static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3717{
7c513058 3718 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3719 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3720 if (status == 0) {
3721 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3722 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3723 }
3724 return status;
3725}
3726
3727static void nfs4_free_createdata(struct nfs4_createdata *data)
3728{
14c43f76 3729 nfs4_label_free(data->label);
57dc9a57
TM		 3730 kfree(data);
3731}
3732
4f390c15 3733static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3734 struct page *page, unsigned int len, struct iattr *sattr,
3735 struct nfs4_label *label)
1da177e4 3736{
57dc9a57
TM		 3737 struct nfs4_createdata *data;
3738 int status = -ENAMETOOLONG;
1da177e4 3739
94a6d753 3740 if (len > NFS4_MAXPATHLEN)
57dc9a57 3741 goto out;
4f390c15 3742
57dc9a57
TM		 3743 status = -ENOMEM;
3744 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3745 if (data == NULL)
3746 goto out;
3747
3748 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3749 data->arg.u.symlink.pages = &page;
3750 data->arg.u.symlink.len = len;
1775fd3e 3751 data->arg.label = label;
1da177e4 3752
57dc9a57
TM		 3753 status = nfs4_do_create(dir, dentry, data);
3754
3755 nfs4_free_createdata(data);
3756out:
1da177e4
LT		 3757 return status;
3758}
3759
4f390c15 3760static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3761 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3762{
3763 struct nfs4_exception exception = { };
aa9c2669 3764 struct nfs4_label l, *label = NULL;
1da177e4 3765 int err;
aa9c2669
DQ		 3766
3767 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3768
1da177e4 3769 do {
078ea3df
TM		 3770 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3771 trace_nfs4_symlink(dir, &dentry->d_name, err);
3772 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3773 &exception);
3774 } while (exception.retry);
aa9c2669
DQ		 3775
3776 nfs4_label_release_security(label);
1da177e4
LT		 3777 return err;
3778}
3779
3780static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3781 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3782{
57dc9a57
TM		 3783 struct nfs4_createdata *data;
3784 int status = -ENOMEM;
1da177e4 3785
57dc9a57
TM		 3786 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3787 if (data == NULL)
3788 goto out;
3789
1775fd3e 3790 data->arg.label = label;
57dc9a57
TM		 3791 status = nfs4_do_create(dir, dentry, data);
3792
3793 nfs4_free_createdata(data);
3794out:
1da177e4
LT		 3795 return status;
3796}
3797
3798static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3799 struct iattr *sattr)
3800{
3801 struct nfs4_exception exception = { };
aa9c2669 3802 struct nfs4_label l, *label = NULL;
1da177e4 3803 int err;
a8a5da99 3804
aa9c2669
DQ		 3805 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3806
a8a5da99 3807 sattr->ia_mode &= ~current_umask();
1da177e4 3808 do {
078ea3df
TM		 3809 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3810 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3811 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3812 &exception);
3813 } while (exception.retry);
aa9c2669
DQ		 3814 nfs4_label_release_security(label);
3815
1da177e4
LT		 3816 return err;
3817}
3818
3819static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3820 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3821{
3822 struct inode *dir = dentry->d_inode;
3823 struct nfs4_readdir_arg args = {
3824 .fh = NFS_FH(dir),
56e4ebf8 3825 .pages = pages,
1da177e4
LT		 3826 .pgbase = 0,
3827 .count = count,
96d25e53 3828 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3829 .plus = plus,
1da177e4
LT		 3830 };
3831 struct nfs4_readdir_res res;
3832 struct rpc_message msg = {
3833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3834 .rpc_argp = &args,
3835 .rpc_resp = &res,
3836 .rpc_cred = cred,
3837 };
3838 int status;
3839
6de1472f
AV		 3840 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3841 dentry,
eadf4598 3842 (unsigned long long)cookie);
c3f52af3 3843 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3844 res.pgbase = args.pgbase;
7c513058 3845 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3846 if (status >= 0) {
c3f52af3 3847 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3848 status += args.pgbase;
3849 }
c4812998
TM		 3850
3851 nfs_invalidate_atime(dir);
3852
3110ff80 3853 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3854 return status;
3855}
3856
3857static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3858 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3859{
3860 struct nfs4_exception exception = { };
3861 int err;
3862 do {
c1578b76
TM		 3863 err = _nfs4_proc_readdir(dentry, cred, cookie,
3864 pages, count, plus);
3865 trace_nfs4_readdir(dentry->d_inode, err);
3866 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3867 &exception);
3868 } while (exception.retry);
3869 return err;
3870}
3871
3872static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3873 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3874{
57dc9a57
TM		 3875 struct nfs4_createdata *data;
3876 int mode = sattr->ia_mode;
3877 int status = -ENOMEM;
1da177e4 3878
57dc9a57
TM		 3879 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3880 if (data == NULL)
3881 goto out;
3882
1da177e4 3883 if (S_ISFIFO(mode))
57dc9a57 3884 data->arg.ftype = NF4FIFO;
1da177e4 3885 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3886 data->arg.ftype = NF4BLK;
3887 data->arg.u.device.specdata1 = MAJOR(rdev);
3888 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3889 }
3890 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3891 data->arg.ftype = NF4CHR;
3892 data->arg.u.device.specdata1 = MAJOR(rdev);
3893 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3894 } else if (!S_ISSOCK(mode)) {
3895 status = -EINVAL;
3896 goto out_free;
1da177e4 3897 }
1775fd3e 3898
aa9c2669 3899 data->arg.label = label;
57dc9a57 3900 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3901out_free:
57dc9a57
TM		 3902 nfs4_free_createdata(data);
3903out:
1da177e4
LT		 3904 return status;
3905}
3906
3907static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3908 struct iattr *sattr, dev_t rdev)
3909{
3910 struct nfs4_exception exception = { };
aa9c2669 3911 struct nfs4_label l, *label = NULL;
1da177e4 3912 int err;
a8a5da99 3913
aa9c2669
DQ		 3914 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3915
a8a5da99 3916 sattr->ia_mode &= ~current_umask();
1da177e4 3917 do {
078ea3df
TM		 3918 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3919 trace_nfs4_mknod(dir, &dentry->d_name, err);
3920 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3921 &exception);
3922 } while (exception.retry);
aa9c2669
DQ		 3923
3924 nfs4_label_release_security(label);
3925
1da177e4
LT		 3926 return err;
3927}
3928
3929static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3930 struct nfs_fsstat *fsstat)
3931{
3932 struct nfs4_statfs_arg args = {
3933 .fh = fhandle,
3934 .bitmask = server->attr_bitmask,
3935 };
24ad148a
BH		 3936 struct nfs4_statfs_res res = {
3937 .fsstat = fsstat,
3938 };
1da177e4
LT		 3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3941 .rpc_argp = &args,
24ad148a 3942 .rpc_resp = &res,
1da177e4
LT		 3943 };
3944
0e574af1 3945 nfs_fattr_init(fsstat->fattr);
7c513058 3946 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3947}
3948
3949static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3950{
3951 struct nfs4_exception exception = { };
3952 int err;
3953 do {
3954 err = nfs4_handle_exception(server,
3955 _nfs4_proc_statfs(server, fhandle, fsstat),
3956 &exception);
3957 } while (exception.retry);
3958 return err;
3959}
3960
3961static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3962 struct nfs_fsinfo *fsinfo)
3963{
3964 struct nfs4_fsinfo_arg args = {
3965 .fh = fhandle,
3966 .bitmask = server->attr_bitmask,
3967 };
3dda5e43
BH		 3968 struct nfs4_fsinfo_res res = {
3969 .fsinfo = fsinfo,
3970 };
1da177e4
LT		 3971 struct rpc_message msg = {
3972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3973 .rpc_argp = &args,
3dda5e43 3974 .rpc_resp = &res,
1da177e4
LT		 3975 };
3976
7c513058 3977 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3978}
3979
3980static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3981{
3982 struct nfs4_exception exception = { };
83ca7f5a 3983 unsigned long now = jiffies;
1da177e4
LT		 3984 int err;
3985
3986 do {
83ca7f5a 3987 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3988 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3989 if (err == 0) {
3990 struct nfs_client *clp = server->nfs_client;
3991
3992 spin_lock(&clp->cl_lock);
3993 clp->cl_lease_time = fsinfo->lease_time * HZ;
3994 clp->cl_last_renewal = now;
3995 spin_unlock(&clp->cl_lock);
3996 break;
3997 }
3998 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3999 } while (exception.retry);
4000 return err;
4001}
4002
4003static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4004{
e38eb650
BS		 4005 int error;
4006
0e574af1 4007 nfs_fattr_init(fsinfo->fattr);
e38eb650 4008 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4009 if (error == 0) {
4010 /* block layout checks this! */
4011 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4012 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4013 }
e38eb650
BS		 4014
4015 return error;
1da177e4
LT		 4016}
4017
4018static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4019 struct nfs_pathconf *pathconf)
4020{
4021 struct nfs4_pathconf_arg args = {
4022 .fh = fhandle,
4023 .bitmask = server->attr_bitmask,
4024 };
d45b2989
BH		 4025 struct nfs4_pathconf_res res = {
4026 .pathconf = pathconf,
4027 };
1da177e4
LT		 4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4030 .rpc_argp = &args,
d45b2989 4031 .rpc_resp = &res,
1da177e4
LT		 4032 };
4033
4034 /* None of the pathconf attributes are mandatory to implement */
4035 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4036 memset(pathconf, 0, sizeof(*pathconf));
4037 return 0;
4038 }
4039
0e574af1 4040 nfs_fattr_init(pathconf->fattr);
7c513058 4041 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4042}
4043
4044static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4045 struct nfs_pathconf *pathconf)
4046{
4047 struct nfs4_exception exception = { };
4048 int err;
4049
4050 do {
4051 err = nfs4_handle_exception(server,
4052 _nfs4_proc_pathconf(server, fhandle, pathconf),
4053 &exception);
4054 } while (exception.retry);
4055 return err;
4056}
4057
5521abfd 4058int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4059 const struct nfs_open_context *ctx,
4060 const struct nfs_lock_context *l_ctx,
4061 fmode_t fmode)
4062{
4063 const struct nfs_lockowner *lockowner = NULL;
4064
4065 if (l_ctx != NULL)
4066 lockowner = &l_ctx->lockowner;
5521abfd 4067 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4068}
4069EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4070
5521abfd
TM		 4071static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4072 const struct nfs_open_context *ctx,
4073 const struct nfs_lock_context *l_ctx,
4074 fmode_t fmode)
4075{
4076 nfs4_stateid current_stateid;
4077
e1253be0
TM		 4078 /* If the current stateid represents a lost lock, then exit */
4079 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4080 return true;
5521abfd
TM		 4081 return nfs4_stateid_match(stateid, &current_stateid);
4082}
4083
4084static bool nfs4_error_stateid_expired(int err)
4085{
4086 switch (err) {
4087 case -NFS4ERR_DELEG_REVOKED:
4088 case -NFS4ERR_ADMIN_REVOKED:
4089 case -NFS4ERR_BAD_STATEID:
4090 case -NFS4ERR_STALE_STATEID:
4091 case -NFS4ERR_OLD_STATEID:
4092 case -NFS4ERR_OPENMODE:
4093 case -NFS4ERR_EXPIRED:
4094 return true;
4095 }
4096 return false;
4097}
4098
d45f60c6 4099void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4100{
d45f60c6 4101 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4102}
4103
d45f60c6 4104static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4105{
d45f60c6 4106 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4107
d45f60c6
WAA		 4108 trace_nfs4_read(hdr, task->tk_status);
4109 if (nfs4_async_handle_error(task, server,
4110 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4111 rpc_restart_call_prepare(task);
ec06c096 4112 return -EAGAIN;
1da177e4 4113 }
8850df99 4114
d45f60c6 4115 __nfs4_read_done_cb(hdr);
1da177e4 4116 if (task->tk_status > 0)
d45f60c6 4117 renew_lease(server, hdr->timestamp);
ec06c096 4118 return 0;
1da177e4
LT		 4119}
4120
5521abfd 4121static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4122 struct nfs_pgio_args *args)
5521abfd
TM		 4123{
4124
4125 if (!nfs4_error_stateid_expired(task->tk_status) ||
4126 nfs4_stateid_is_current(&args->stateid,
4127 args->context,
4128 args->lock_context,
4129 FMODE_READ))
4130 return false;
4131 rpc_restart_call_prepare(task);
4132 return true;
4133}
4134
d45f60c6 4135static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4136{
4137
4138 dprintk("--> %s\n", __func__);
4139
d45f60c6 4140 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4141 return -EAGAIN;
d45f60c6 4142 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4143 return -EAGAIN;
d45f60c6
WAA		 4144 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4145 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4146}
4147
d45f60c6
WAA		 4148static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4149 struct rpc_message *msg)
1da177e4 4150{
d45f60c6
WAA		 4151 hdr->timestamp = jiffies;
4152 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4154 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4155}
4156
d45f60c6
WAA		 4157static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4158 struct nfs_pgio_header *hdr)
ea7c3303 4159{
d45f60c6
WAA		 4160 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4161 &hdr->args.seq_args,
4162 &hdr->res.seq_res,
9b206149 4163 task))
ef1820f9 4164 return 0;
d45f60c6
WAA		 4165 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4166 hdr->args.lock_context,
4167 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4168 return -EIO;
d45f60c6 4169 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4170 return -EIO;
4171 return 0;
1da177e4
LT		 4172}
4173
d45f60c6
WAA		 4174static int nfs4_write_done_cb(struct rpc_task *task,
4175 struct nfs_pgio_header *hdr)
1da177e4 4176{
d45f60c6 4177 struct inode *inode = hdr->inode;
1da177e4 4178
d45f60c6
WAA		 4179 trace_nfs4_write(hdr, task->tk_status);
4180 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4181 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4182 rpc_restart_call_prepare(task);
788e7a89 4183 return -EAGAIN;
1da177e4 4184 }
4f9838c7 4185 if (task->tk_status >= 0) {
d45f60c6
WAA		 4186 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4187 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4188 }
788e7a89 4189 return 0;
1da177e4
LT		 4190}
4191
5521abfd 4192static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4193 struct nfs_pgio_args *args)
5521abfd
TM		 4194{
4195
4196 if (!nfs4_error_stateid_expired(task->tk_status) ||
4197 nfs4_stateid_is_current(&args->stateid,
4198 args->context,
4199 args->lock_context,
4200 FMODE_WRITE))
4201 return false;
4202 rpc_restart_call_prepare(task);
4203 return true;
4204}
4205
d45f60c6 4206static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4207{
d45f60c6 4208 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4209 return -EAGAIN;
d45f60c6 4210 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4211 return -EAGAIN;
d45f60c6
WAA		 4212 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4213 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4214}
4215
5a37f851 4216static
d45f60c6 4217bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4218{
5a37f851 4219 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4220 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4221 return false;
4222 /* Otherwise, request attributes if and only if we don't hold
4223 * a delegation
4224 */
011e2a7f 4225 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4226}
a69aef14 4227
d45f60c6
WAA		 4228static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4229 struct rpc_message *msg)
1da177e4 4230{
d45f60c6 4231 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4232
d45f60c6
WAA		 4233 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4234 hdr->args.bitmask = NULL;
4235 hdr->res.fattr = NULL;
7ffd1064 4236 } else
d45f60c6 4237 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4238
d45f60c6
WAA		 4239 if (!hdr->pgio_done_cb)
4240 hdr->pgio_done_cb = nfs4_write_done_cb;
4241 hdr->res.server = server;
4242 hdr->timestamp = jiffies;
1da177e4 4243
bdc7f021 4244 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4245 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4246}
4247
0b7c0153 4248static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4249{
d9afbd1b
TM		 4250 nfs4_setup_sequence(NFS_SERVER(data->inode),
4251 &data->args.seq_args,
4252 &data->res.seq_res,
4253 task);
1da177e4
LT		 4254}
4255
0b7c0153 4256static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4257{
1da177e4 4258 struct inode *inode = data->inode;
14516c3a 4259
cc668ab3 4260 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4261 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4262 rpc_restart_call_prepare(task);
788e7a89 4263 return -EAGAIN;
1da177e4 4264 }
788e7a89 4265 return 0;
1da177e4
LT		 4266}
4267
0b7c0153 4268static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4269{
4270 if (!nfs4_sequence_done(task, &data->res.seq_res))
4271 return -EAGAIN;
0b7c0153 4272 return data->commit_done_cb(task, data);
5f452431
FI		 4273}
4274
0b7c0153 4275static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4276{
788e7a89 4277 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4278
0b7c0153
FI		 4279 if (data->commit_done_cb == NULL)
4280 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4281 data->res.server = server;
bdc7f021 4282 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4283 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4284}
4285
9bc4e3ca
CL		 4286struct nfs4_renewdata {
4287 struct nfs_client *client;
4288 unsigned long timestamp;
4289};
4290
1da177e4
LT		 4291/*
4292 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4293 * standalone procedure for queueing an asynchronous RENEW.
4294 */
9bc4e3ca 4295static void nfs4_renew_release(void *calldata)
dc96aef9 4296{
9bc4e3ca
CL		 4297 struct nfs4_renewdata *data = calldata;
4298 struct nfs_client *clp = data->client;
dc96aef9 4299
0851de06
AB		 4300 if (atomic_read(&clp->cl_count) > 1)
4301 nfs4_schedule_state_renewal(clp);
4302 nfs_put_client(clp);
9bc4e3ca 4303 kfree(data);
dc96aef9
AB		 4304}
4305
9bc4e3ca 4306static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4307{
9bc4e3ca
CL		 4308 struct nfs4_renewdata *data = calldata;
4309 struct nfs_client *clp = data->client;
4310 unsigned long timestamp = data->timestamp;
1da177e4 4311
c6d01c6f 4312 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4313 switch (task->tk_status) {
4314 case 0:
4315 break;
4316 case -NFS4ERR_LEASE_MOVED:
4317 nfs4_schedule_lease_moved_recovery(clp);
4318 break;
4319 default:
95baa25c 4320 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4321 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4322 return;
4323 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4324 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4325 return;
4326 }
4327 nfs4_schedule_path_down_recovery(clp);
1da177e4 4328 }
452e9352 4329 do_renew_lease(clp, timestamp);
1da177e4
LT		 4330}
4331
963d8fe5
TM		 4332static const struct rpc_call_ops nfs4_renew_ops = {
4333 .rpc_call_done = nfs4_renew_done,
dc96aef9 4334 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4335};
4336
2f60ea6b 4337static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4338{
4339 struct rpc_message msg = {
4340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4341 .rpc_argp = clp,
b4454fe1 4342 .rpc_cred = cred,
1da177e4 4343 };
9bc4e3ca 4344 struct nfs4_renewdata *data;
1da177e4 4345
2f60ea6b
TM		 4346 if (renew_flags == 0)
4347 return 0;
0851de06
AB		 4348 if (!atomic_inc_not_zero(&clp->cl_count))
4349 return -EIO;
b569ad34 4350 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4351 if (data == NULL)
4352 return -ENOMEM;
4353 data->client = clp;
4354 data->timestamp = jiffies;
bc7a05ca 4355 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4356 &nfs4_renew_ops, data);
1da177e4
LT		 4357}
4358
8534d4ec 4359static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4360{
4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4363 .rpc_argp = clp,
b4454fe1 4364 .rpc_cred = cred,
1da177e4
LT		 4365 };
4366 unsigned long now = jiffies;
4367 int status;
4368
bc7a05ca 4369 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4370 if (status < 0)
4371 return status;
452e9352 4372 do_renew_lease(clp, now);
1da177e4
LT		 4373 return 0;
4374}
4375
aa1870af
BF		 4376static inline int nfs4_server_supports_acls(struct nfs_server *server)
4377{
7dd7d959 4378 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4379}
4380
21f498c2
TM		 4381/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4382 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4383 * the stack.
4384 */
21f498c2 4385#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4386
e9e3d724
NH		 4387static int buf_to_pages_noslab(const void *buf, size_t buflen,
4388 struct page **pages, unsigned int *pgbase)
4389{
4390 struct page *newpage, **spages;
4391 int rc = 0;
4392 size_t len;
4393 spages = pages;
4394
4395 do {
21f498c2 4396 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4397 newpage = alloc_page(GFP_KERNEL);
4398
4399 if (newpage == NULL)
4400 goto unwind;
4401 memcpy(page_address(newpage), buf, len);
4402 buf += len;
4403 buflen -= len;
4404 *pages++ = newpage;
4405 rc++;
4406 } while (buflen != 0);
4407
4408 return rc;
4409
4410unwind:
4411 for(; rc > 0; rc--)
4412 __free_page(spages[rc-1]);
4413 return -ENOMEM;
4414}
4415
e50a1c2e
BF		 4416struct nfs4_cached_acl {
4417 int cached;
4418 size_t len;
3e9d4154 4419 char data[0];
e50a1c2e
BF		 4420};
4421
4422static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4423{
4424 struct nfs_inode *nfsi = NFS_I(inode);
4425
4426 spin_lock(&inode->i_lock);
4427 kfree(nfsi->nfs4_acl);
4428 nfsi->nfs4_acl = acl;
4429 spin_unlock(&inode->i_lock);
4430}
4431
4432static void nfs4_zap_acl_attr(struct inode *inode)
4433{
4434 nfs4_set_cached_acl(inode, NULL);
4435}
4436
4437static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4438{
4439 struct nfs_inode *nfsi = NFS_I(inode);
4440 struct nfs4_cached_acl *acl;
4441 int ret = -ENOENT;
4442
4443 spin_lock(&inode->i_lock);
4444 acl = nfsi->nfs4_acl;
4445 if (acl == NULL)
4446 goto out;
4447 if (buf == NULL) /* user is just asking for length */
4448 goto out_len;
4449 if (acl->cached == 0)
4450 goto out;
4451 ret = -ERANGE; /* see getxattr(2) man page */
4452 if (acl->len > buflen)
4453 goto out;
4454 memcpy(buf, acl->data, acl->len);
4455out_len:
4456 ret = acl->len;
4457out:
4458 spin_unlock(&inode->i_lock);
4459 return ret;
4460}
4461
5794d21e 4462static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4463{
4464 struct nfs4_cached_acl *acl;
b291f1b1 4465 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4466
1f1ea6c2 4467 if (buflen <= PAGE_SIZE) {
b291f1b1 4468 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4469 if (acl == NULL)
4470 goto out;
4471 acl->cached = 1;
5794d21e 4472 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4473 } else {
4474 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4475 if (acl == NULL)
4476 goto out;
4477 acl->cached = 0;
4478 }
4479 acl->len = acl_len;
4480out:
4481 nfs4_set_cached_acl(inode, acl);
4482}
4483
bf118a34
AA		 4484/*
4485 * The getxattr API returns the required buffer length when called with a
4486 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4487 * the required buf. On a NULL buf, we send a page of data to the server
4488 * guessing that the ACL request can be serviced by a page. If so, we cache
4489 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4490 * the cache. If not so, we throw away the page, and cache the required
4491 * length. The next getxattr call will then produce another round trip to
4492 * the server, this time with the input buf of the required size.
4493 */
16b4289c 4494static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4495{
bf118a34 4496 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4497 struct nfs_getaclargs args = {
4498 .fh = NFS_FH(inode),
4499 .acl_pages = pages,
4500 .acl_len = buflen,
4501 };
663c79b3
BH		 4502 struct nfs_getaclres res = {
4503 .acl_len = buflen,
4504 };
aa1870af
BF		 4505 struct rpc_message msg = {
4506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4507 .rpc_argp = &args,
663c79b3 4508 .rpc_resp = &res,
aa1870af 4509 };
21f498c2
TM		 4510 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4511 int ret = -ENOMEM, i;
aa1870af 4512
bf118a34
AA		 4513 /* As long as we're doing a round trip to the server anyway,
4514 * let's be prepared for a page of acl data. */
4515 if (npages == 0)
4516 npages = 1;
21f498c2
TM		 4517 if (npages > ARRAY_SIZE(pages))
4518 return -ERANGE;
5a006899 4519
bf118a34
AA		 4520 for (i = 0; i < npages; i++) {
4521 pages[i] = alloc_page(GFP_KERNEL);
4522 if (!pages[i])
4523 goto out_free;
e50a1c2e 4524 }
5a006899
SP		 4525
4526 /* for decoding across pages */
4527 res.acl_scratch = alloc_page(GFP_KERNEL);
4528 if (!res.acl_scratch)
4529 goto out_free;
4530
bf118a34
AA		 4531 args.acl_len = npages * PAGE_SIZE;
4532 args.acl_pgbase = 0;
5a006899 4533
de040bec 4534 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4535 __func__, buf, buflen, npages, args.acl_len);
4536 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4537 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4538 if (ret)
4539 goto out_free;
bf118a34 4540
1f1ea6c2
TM		 4541 /* Handle the case where the passed-in buffer is too short */
4542 if (res.acl_flags & NFS4_ACL_TRUNC) {
4543 /* Did the user only issue a request for the acl length? */
4544 if (buf == NULL)
4545 goto out_ok;
e50a1c2e 4546 ret = -ERANGE;
1f1ea6c2 4547 goto out_free;
e50a1c2e 4548 }
1f1ea6c2 4549 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4550 if (buf) {
4551 if (res.acl_len > buflen) {
4552 ret = -ERANGE;
4553 goto out_free;
4554 }
1f1ea6c2 4555 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4556 }
1f1ea6c2
TM		 4557out_ok:
4558 ret = res.acl_len;
e50a1c2e 4559out_free:
bf118a34
AA		 4560 for (i = 0; i < npages; i++)
4561 if (pages[i])
4562 __free_page(pages[i]);
331818f1
TM		 4563 if (res.acl_scratch)
4564 __free_page(res.acl_scratch);
aa1870af
BF		 4565 return ret;
4566}
4567
16b4289c
TM		 4568static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4569{
4570 struct nfs4_exception exception = { };
4571 ssize_t ret;
4572 do {
4573 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4574 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4575 if (ret >= 0)
4576 break;
4577 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4578 } while (exception.retry);
4579 return ret;
4580}
4581
e50a1c2e
BF		 4582static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4583{
4584 struct nfs_server *server = NFS_SERVER(inode);
4585 int ret;
4586
4587 if (!nfs4_server_supports_acls(server))
4588 return -EOPNOTSUPP;
4589 ret = nfs_revalidate_inode(server, inode);
4590 if (ret < 0)
4591 return ret;
08a22b39
AK		 4592 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4593 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4594 ret = nfs4_read_cached_acl(inode, buf, buflen);
4595 if (ret != -ENOENT)
bf118a34
AA		 4596 /* -ENOENT is returned if there is no ACL or if there is an ACL
4597 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4598 return ret;
4599 return nfs4_get_acl_uncached(inode, buf, buflen);
4600}
4601
16b4289c 4602static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4603{
4604 struct nfs_server *server = NFS_SERVER(inode);
4605 struct page *pages[NFS4ACL_MAXPAGES];
4606 struct nfs_setaclargs arg = {
4607 .fh = NFS_FH(inode),
4608 .acl_pages = pages,
4609 .acl_len = buflen,
4610 };
73c403a9 4611 struct nfs_setaclres res;
4b580ee3
BF		 4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4614 .rpc_argp = &arg,
73c403a9 4615 .rpc_resp = &res,
4b580ee3 4616 };
21f498c2 4617 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4618 int ret, i;
4b580ee3
BF		 4619
4620 if (!nfs4_server_supports_acls(server))
4621 return -EOPNOTSUPP;
21f498c2
TM		 4622 if (npages > ARRAY_SIZE(pages))
4623 return -ERANGE;
e9e3d724
NH		 4624 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4625 if (i < 0)
4626 return i;
57ec14c5 4627 nfs4_inode_return_delegation(inode);
7c513058 4628 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4629
4630 /*
4631 * Free each page after tx, so the only ref left is
4632 * held by the network stack
4633 */
4634 for (; i > 0; i--)
4635 put_page(pages[i-1]);
4636
08a22b39
AK		 4637 /*
4638 * Acl update can result in inode attribute update.
4639 * so mark the attribute cache invalid.
4640 */
4641 spin_lock(&inode->i_lock);
4642 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4643 spin_unlock(&inode->i_lock);
f41f7418
TM		 4644 nfs_access_zap_cache(inode);
4645 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4646 return ret;
4647}
4648
16b4289c
TM		 4649static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4650{
4651 struct nfs4_exception exception = { };
4652 int err;
4653 do {
c1578b76
TM		 4654 err = __nfs4_proc_set_acl(inode, buf, buflen);
4655 trace_nfs4_set_acl(inode, err);
4656 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4657 &exception);
4658 } while (exception.retry);
4659 return err;
4660}
4661
aa9c2669
DQ		 4662#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4663static int _nfs4_get_security_label(struct inode *inode, void *buf,
4664 size_t buflen)
4665{
4666 struct nfs_server *server = NFS_SERVER(inode);
4667 struct nfs_fattr fattr;
4668 struct nfs4_label label = {0, 0, buflen, buf};
4669
4670 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4671 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4672 .fh = NFS_FH(inode),
4673 .bitmask = bitmask,
4674 };
4675 struct nfs4_getattr_res res = {
4676 .fattr = &fattr,
4677 .label = &label,
4678 .server = server,
4679 };
4680 struct rpc_message msg = {
4681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4682 .rpc_argp = &arg,
aa9c2669
DQ		 4683 .rpc_resp = &res,
4684 };
4685 int ret;
4686
4687 nfs_fattr_init(&fattr);
4688
fcb63a9b 4689 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4690 if (ret)
4691 return ret;
4692 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4693 return -ENOENT;
4694 if (buflen < label.len)
4695 return -ERANGE;
4696 return 0;
4697}
4698
4699static int nfs4_get_security_label(struct inode *inode, void *buf,
4700 size_t buflen)
4701{
4702 struct nfs4_exception exception = { };
4703 int err;
4704
4705 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4706 return -EOPNOTSUPP;
4707
4708 do {
c1578b76
TM		 4709 err = _nfs4_get_security_label(inode, buf, buflen);
4710 trace_nfs4_get_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 _nfs4_do_set_security_label(struct inode *inode,
4718 struct nfs4_label *ilabel,
4719 struct nfs_fattr *fattr,
4720 struct nfs4_label *olabel)
4721{
4722
4723 struct iattr sattr = {0};
4724 struct nfs_server *server = NFS_SERVER(inode);
4725 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4726 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4727 .fh = NFS_FH(inode),
4728 .iap = &sattr,
4729 .server = server,
4730 .bitmask = bitmask,
4731 .label = ilabel,
4732 };
4733 struct nfs_setattrres res = {
4734 .fattr = fattr,
4735 .label = olabel,
4736 .server = server,
4737 };
4738 struct rpc_message msg = {
4739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4740 .rpc_argp = &arg,
aa9c2669
DQ		 4741 .rpc_resp = &res,
4742 };
4743 int status;
4744
12207f69 4745 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4746
12207f69 4747 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4748 if (status)
4749 dprintk("%s failed: %d\n", __func__, status);
4750
4751 return status;
4752}
4753
4754static int nfs4_do_set_security_label(struct inode *inode,
4755 struct nfs4_label *ilabel,
4756 struct nfs_fattr *fattr,
4757 struct nfs4_label *olabel)
4758{
4759 struct nfs4_exception exception = { };
4760 int err;
4761
4762 do {
c1578b76
TM		 4763 err = _nfs4_do_set_security_label(inode, ilabel,
4764 fattr, olabel);
4765 trace_nfs4_set_security_label(inode, err);
4766 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4767 &exception);
4768 } while (exception.retry);
4769 return err;
4770}
4771
4772static int
4773nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4774{
4775 struct nfs4_label ilabel, *olabel = NULL;
4776 struct nfs_fattr fattr;
4777 struct rpc_cred *cred;
4778 struct inode *inode = dentry->d_inode;
4779 int status;
4780
4781 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4782 return -EOPNOTSUPP;
4783
4784 nfs_fattr_init(&fattr);
4785
4786 ilabel.pi = 0;
4787 ilabel.lfs = 0;
4788 ilabel.label = (char *)buf;
4789 ilabel.len = buflen;
4790
4791 cred = rpc_lookup_cred();
4792 if (IS_ERR(cred))
4793 return PTR_ERR(cred);
4794
4795 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4796 if (IS_ERR(olabel)) {
4797 status = -PTR_ERR(olabel);
4798 goto out;
4799 }
4800
4801 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4802 if (status == 0)
4803 nfs_setsecurity(inode, &fattr, olabel);
4804
4805 nfs4_label_free(olabel);
4806out:
4807 put_rpccred(cred);
4808 return status;
4809}
4810#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4811
4812
1da177e4 4813static int
aa5190d0 4814nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4815{
aa5190d0
TM		 4816 struct nfs_client *clp = server->nfs_client;
4817
4818 if (task->tk_status >= 0)
1da177e4
LT		 4819 return 0;
4820 switch(task->tk_status) {
a1d0b5ee 4821 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4822 case -NFS4ERR_ADMIN_REVOKED:
4823 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4824 if (state == NULL)
4825 break;
4826 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4827 case -NFS4ERR_OPENMODE:
4828 if (state == NULL)
4829 break;
5d422301 4830 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4831 goto recovery_failed;
0400a6b0 4832 goto wait_on_recovery;
0ced63d1 4833 case -NFS4ERR_EXPIRED:
5d422301
TM		 4834 if (state != NULL) {
4835 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4836 goto recovery_failed;
5d422301 4837 }
1da177e4 4838 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4839 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4840 nfs4_schedule_lease_recovery(clp);
4841 goto wait_on_recovery;
519ae255
CL		 4842 case -NFS4ERR_MOVED:
4843 if (nfs4_schedule_migration_recovery(server) < 0)
4844 goto recovery_failed;
4845 goto wait_on_recovery;
8ef2f8d4
CL		 4846 case -NFS4ERR_LEASE_MOVED:
4847 nfs4_schedule_lease_moved_recovery(clp);
4848 goto wait_on_recovery;
4745e315
AA		 4849#if defined(CONFIG_NFS_V4_1)
4850 case -NFS4ERR_BADSESSION:
4851 case -NFS4ERR_BADSLOT:
4852 case -NFS4ERR_BAD_HIGH_SLOT:
4853 case -NFS4ERR_DEADSESSION:
4854 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4855 case -NFS4ERR_SEQ_FALSE_RETRY:
4856 case -NFS4ERR_SEQ_MISORDERED:
4857 dprintk("%s ERROR %d, Reset session\n", __func__,
4858 task->tk_status);
9f594791 4859 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4860 goto wait_on_recovery;
4745e315 4861#endif /* CONFIG_NFS_V4_1 */
1da177e4 4862 case -NFS4ERR_DELAY:
aa5190d0 4863 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4864 case -NFS4ERR_GRACE:
1da177e4 4865 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4866 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4867 case -NFS4ERR_OLD_STATEID:
f1478c13 4868 goto restart_call;
1da177e4
LT		 4869 }
4870 task->tk_status = nfs4_map_errors(task->tk_status);
4871 return 0;
9f51a78e 4872recovery_failed:
5d422301
TM		 4873 task->tk_status = -EIO;
4874 return 0;
0400a6b0 4875wait_on_recovery:
a2c0b9e2 4876 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4877 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4878 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4879 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4880 goto recovery_failed;
f1478c13 4881restart_call:
a2c0b9e2
TM		 4882 task->tk_status = 0;
4883 return -EAGAIN;
1da177e4
LT		 4884}
4885
f092075d
CL		 4886static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4887 nfs4_verifier *bootverf)
cd93710e
CL		 4888{
4889 __be32 verf[2];
4890
2c820d9a
CL		 4891 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4892 /* An impossible timestamp guarantees this value
4893 * will never match a generated boot time. */
4894 verf[0] = 0;
17f26b12 4895 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4896 } else {
f092075d 4897 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4898 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4899 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4900 }
cd93710e
CL		 4901 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4902}
4903
e984a55a
CL		 4904static unsigned int
4905nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4906 char *buf, size_t len)
4907{
4908 unsigned int result;
4909
4910 rcu_read_lock();
4911 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4912 clp->cl_ipaddr,
4913 rpc_peeraddr2str(clp->cl_rpcclient,
4914 RPC_DISPLAY_ADDR),
4915 rpc_peeraddr2str(clp->cl_rpcclient,
4916 RPC_DISPLAY_PROTO));
4917 rcu_read_unlock();
4918 return result;
4919}
4920
4921static unsigned int
4922nfs4_init_uniform_client_string(const struct nfs_client *clp,
4923 char *buf, size_t len)
4924{
55b59293 4925 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4926
4927 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4928 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4929 clp->rpc_ops->version,
4930 clp->cl_minorversion,
4931 nfs4_client_id_uniquifier,
4932 nodename);
e984a55a
CL		 4933 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4934 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4935 nodename);
e984a55a
CL		 4936}
4937
706cb8db
CL		 4938/*
4939 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4940 * services. Advertise one based on the address family of the
4941 * clientaddr.
4942 */
4943static unsigned int
4944nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4945{
4946 if (strchr(clp->cl_ipaddr, ':') != NULL)
4947 return scnprintf(buf, len, "tcp6");
4948 else
4949 return scnprintf(buf, len, "tcp");
4950}
4951
f11b2a1c
JL		 4952static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4953{
4954 struct nfs4_setclientid *sc = calldata;
4955
4956 if (task->tk_status == 0)
4957 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4958}
4959
4960static const struct rpc_call_ops nfs4_setclientid_ops = {
4961 .rpc_call_done = nfs4_setclientid_done,
4962};
4963
6bbb4ae8
CL		 4964/**
4965 * nfs4_proc_setclientid - Negotiate client ID
4966 * @clp: state data structure
4967 * @program: RPC program for NFSv4 callback service
4968 * @port: IP port number for NFS4 callback service
4969 * @cred: RPC credential to use for this call
4970 * @res: where to place the result
4971 *
4972 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4973 */
bb8b27e5
TM		 4974int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4975 unsigned short port, struct rpc_cred *cred,
4976 struct nfs4_setclientid_res *res)
1da177e4
LT		 4977{
4978 nfs4_verifier sc_verifier;
4979 struct nfs4_setclientid setclientid = {
4980 .sc_verifier = &sc_verifier,
4981 .sc_prog = program,
f4eecd5d 4982 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4983 };
4984 struct rpc_message msg = {
4985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4986 .rpc_argp = &setclientid,
bb8b27e5 4987 .rpc_resp = res,
286d7d6a 4988 .rpc_cred = cred,
1da177e4 4989 };
f11b2a1c
JL		 4990 struct rpc_task *task;
4991 struct rpc_task_setup task_setup_data = {
4992 .rpc_client = clp->cl_rpcclient,
4993 .rpc_message = &msg,
4994 .callback_ops = &nfs4_setclientid_ops,
4995 .callback_data = &setclientid,
4996 .flags = RPC_TASK_TIMEOUT,
4997 };
6bbb4ae8 4998 int status;
1da177e4 4999
de734831 5000 /* nfs_client_id4 */
f092075d 5001 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5002 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5003 setclientid.sc_name_len =
5004 nfs4_init_uniform_client_string(clp,
5005 setclientid.sc_name,
5006 sizeof(setclientid.sc_name));
5007 else
5008 setclientid.sc_name_len =
5009 nfs4_init_nonuniform_client_string(clp,
5010 setclientid.sc_name,
5011 sizeof(setclientid.sc_name));
de734831 5012 /* cb_client4 */
706cb8db
CL		 5013 setclientid.sc_netid_len =
5014 nfs4_init_callback_netid(clp,
5015 setclientid.sc_netid,
5016 sizeof(setclientid.sc_netid));
de734831 5017 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5018 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5019 clp->cl_ipaddr, port >> 8, port & 255);
5020
6bbb4ae8
CL		 5021 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5022 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5023 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5024 task = rpc_run_task(&task_setup_data);
5025 if (IS_ERR(task)) {
5026 status = PTR_ERR(task);
5027 goto out;
5028 }
5029 status = task->tk_status;
5030 if (setclientid.sc_cred) {
5031 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5032 put_rpccred(setclientid.sc_cred);
5033 }
5034 rpc_put_task(task);
5035out:
c6d01c6f 5036 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5037 dprintk("NFS reply setclientid: %d\n", status);
5038 return status;
1da177e4
LT		 5039}
5040
6bbb4ae8
CL		 5041/**
5042 * nfs4_proc_setclientid_confirm - Confirm client ID
5043 * @clp: state data structure
5044 * @res: result of a previous SETCLIENTID
5045 * @cred: RPC credential to use for this call
5046 *
5047 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5048 */
fd954ae1 5049int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5050 struct nfs4_setclientid_res *arg,
5051 struct rpc_cred *cred)
1da177e4 5052{
1da177e4
LT		 5053 struct rpc_message msg = {
5054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5055 .rpc_argp = arg,
286d7d6a 5056 .rpc_cred = cred,
1da177e4 5057 };
1da177e4
LT		 5058 int status;
5059
6bbb4ae8
CL		 5060 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5061 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5062 clp->cl_clientid);
1bd714f2 5063 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5064 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5065 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5066 return status;
5067}
5068
fe650407
TM		 5069struct nfs4_delegreturndata {
5070 struct nfs4_delegreturnargs args;
fa178f29 5071 struct nfs4_delegreturnres res;
fe650407
TM		 5072 struct nfs_fh fh;
5073 nfs4_stateid stateid;
26e976a8 5074 unsigned long timestamp;
fa178f29 5075 struct nfs_fattr fattr;
fe650407 5076 int rpc_status;
039b756a
PT		 5077 struct inode *inode;
5078 bool roc;
5079 u32 roc_barrier;
fe650407
TM		 5080};
5081
fe650407
TM		 5082static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5083{
5084 struct nfs4_delegreturndata *data = calldata;
938e1010 5085
14516c3a
TM		 5086 if (!nfs4_sequence_done(task, &data->res.seq_res))
5087 return;
938e1010 5088
ca8acf8d 5089 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5090 switch (task->tk_status) {
79708861 5091 case 0:
fa178f29 5092 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5093 case -NFS4ERR_ADMIN_REVOKED:
5094 case -NFS4ERR_DELEG_REVOKED:
5095 case -NFS4ERR_BAD_STATEID:
5096 case -NFS4ERR_OLD_STATEID:
5097 case -NFS4ERR_STALE_STATEID:
5098 case -NFS4ERR_EXPIRED:
5099 task->tk_status = 0;
039b756a
PT		 5100 if (data->roc)
5101 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5102 break;
79708861
RL		 5103 default:
5104 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5105 -EAGAIN) {
d00c5d43 5106 rpc_restart_call_prepare(task);
79708861
RL		 5107 return;
5108 }
5109 }
5110 data->rpc_status = task->tk_status;
fe650407
TM		 5111}
5112
5113static void nfs4_delegreturn_release(void *calldata)
5114{
039b756a
PT		 5115 struct nfs4_delegreturndata *data = calldata;
5116
5117 if (data->roc)
5118 pnfs_roc_release(data->inode);
fe650407
TM		 5119 kfree(calldata);
5120}
5121
938e1010
AA		 5122static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5123{
5124 struct nfs4_delegreturndata *d_data;
5125
5126 d_data = (struct nfs4_delegreturndata *)data;
5127
039b756a
PT		 5128 if (d_data->roc &&
5129 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5130 return;
5131
d9afbd1b
TM		 5132 nfs4_setup_sequence(d_data->res.server,
5133 &d_data->args.seq_args,
5134 &d_data->res.seq_res,
5135 task);
938e1010 5136}
938e1010 5137
c8d149f3 5138static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5139 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5140 .rpc_call_done = nfs4_delegreturn_done,
5141 .rpc_release = nfs4_delegreturn_release,
5142};
5143
e6f81075 5144static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5145{
5146 struct nfs4_delegreturndata *data;
fa178f29 5147 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5148 struct rpc_task *task;
5138fde0
TM		 5149 struct rpc_message msg = {
5150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5151 .rpc_cred = cred,
5152 };
c970aa85
TM		 5153 struct rpc_task_setup task_setup_data = {
5154 .rpc_client = server->client,
5138fde0 5155 .rpc_message = &msg,
c970aa85
TM		 5156 .callback_ops = &nfs4_delegreturn_ops,
5157 .flags = RPC_TASK_ASYNC,
5158 };
e6f81075 5159 int status = 0;
fe650407 5160
8535b2be 5161 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5162 if (data == NULL)
5163 return -ENOMEM;
a9c92d6b 5164 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5165 data->args.fhandle = &data->fh;
5166 data->args.stateid = &data->stateid;
9e907fec 5167 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5168 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5169 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5170 data->res.fattr = &data->fattr;
5171 data->res.server = server;
5138fde0 5172 nfs_fattr_init(data->res.fattr);
26e976a8 5173 data->timestamp = jiffies;
fe650407 5174 data->rpc_status = 0;
039b756a
PT		 5175 data->inode = inode;
5176 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5177 pnfs_roc(inode) : false;
fe650407 5178
c970aa85 5179 task_setup_data.callback_data = data;
1174dd1f
TM		 5180 msg.rpc_argp = &data->args;
5181 msg.rpc_resp = &data->res;
c970aa85 5182 task = rpc_run_task(&task_setup_data);
7a1218a2 5183 if (IS_ERR(task))
fe650407 5184 return PTR_ERR(task);
e6f81075
TM		 5185 if (!issync)
5186 goto out;
fe650407 5187 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5188 if (status != 0)
5189 goto out;
5190 status = data->rpc_status;
e144cbcc
TM		 5191 if (status == 0)
5192 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5193 else
5194 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5195out:
e6b3c4db 5196 rpc_put_task(task);
fe650407 5197 return status;
1da177e4
LT		 5198}
5199
e6f81075 5200int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5201{
5202 struct nfs_server *server = NFS_SERVER(inode);
5203 struct nfs4_exception exception = { };
5204 int err;
5205 do {
e6f81075 5206 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5207 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5208 switch (err) {
5209 case -NFS4ERR_STALE_STATEID:
5210 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5211 case 0:
5212 return 0;
5213 }
5214 err = nfs4_handle_exception(server, err, &exception);
5215 } while (exception.retry);
5216 return err;
5217}
5218
5219#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5220#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5221
5222/*
5223 * sleep, with exponential backoff, and retry the LOCK operation.
5224 */
5225static unsigned long
5226nfs4_set_lock_task_retry(unsigned long timeout)
5227{
416ad3c9 5228 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5229 timeout <<= 1;
5230 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5231 return NFS4_LOCK_MAXTIMEOUT;
5232 return timeout;
5233}
5234
1da177e4
LT		 5235static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5236{
5237 struct inode *inode = state->inode;
5238 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5239 struct nfs_client *clp = server->nfs_client;
911d1aaf 5240 struct nfs_lockt_args arg = {
1da177e4 5241 .fh = NFS_FH(inode),
911d1aaf 5242 .fl = request,
1da177e4 5243 };
911d1aaf
TM		 5244 struct nfs_lockt_res res = {
5245 .denied = request,
1da177e4
LT		 5246 };
5247 struct rpc_message msg = {
5248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5249 .rpc_argp = &arg,
5250 .rpc_resp = &res,
5251 .rpc_cred = state->owner->so_cred,
5252 };
1da177e4
LT		 5253 struct nfs4_lock_state *lsp;
5254 int status;
5255
911d1aaf 5256 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5257 status = nfs4_set_lock_state(state, request);
5258 if (status != 0)
5259 goto out;
5260 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5261 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5262 arg.lock_owner.s_dev = server->s_dev;
7c513058 5263 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5264 switch (status) {
5265 case 0:
5266 request->fl_type = F_UNLCK;
5267 break;
5268 case -NFS4ERR_DENIED:
5269 status = 0;
1da177e4 5270 }
70cc6487 5271 request->fl_ops->fl_release_private(request);
a6f951dd 5272 request->fl_ops = NULL;
8d0a8a9d 5273out:
1da177e4
LT		 5274 return status;
5275}
5276
5277static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5278{
5279 struct nfs4_exception exception = { };
5280 int err;
5281
5282 do {
d1b748a5
TM		 5283 err = _nfs4_proc_getlk(state, cmd, request);
5284 trace_nfs4_get_lock(request, state, cmd, err);
5285 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5286 &exception);
5287 } while (exception.retry);
5288 return err;
5289}
5290
5291static int do_vfs_lock(struct file *file, struct file_lock *fl)
5292{
5293 int res = 0;
5294 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5295 case FL_POSIX:
5296 res = posix_lock_file_wait(file, fl);
5297 break;
5298 case FL_FLOCK:
5299 res = flock_lock_file_wait(file, fl);
5300 break;
5301 default:
5302 BUG();
5303 }
1da177e4
LT		 5304 return res;
5305}
5306
faf5f49c 5307struct nfs4_unlockdata {
911d1aaf
TM		 5308 struct nfs_locku_args arg;
5309 struct nfs_locku_res res;
faf5f49c
TM		 5310 struct nfs4_lock_state *lsp;
5311 struct nfs_open_context *ctx;
911d1aaf
TM		 5312 struct file_lock fl;
5313 const struct nfs_server *server;
26e976a8 5314 unsigned long timestamp;
faf5f49c
TM		 5315};
5316
911d1aaf
TM		 5317static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5318 struct nfs_open_context *ctx,
5319 struct nfs4_lock_state *lsp,
5320 struct nfs_seqid *seqid)
5321{
5322 struct nfs4_unlockdata *p;
5323 struct inode *inode = lsp->ls_state->inode;
5324
8535b2be 5325 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5326 if (p == NULL)
5327 return NULL;
5328 p->arg.fh = NFS_FH(inode);
5329 p->arg.fl = &p->fl;
5330 p->arg.seqid = seqid;
c1d51931 5331 p->res.seqid = seqid;
911d1aaf
TM		 5332 p->arg.stateid = &lsp->ls_stateid;
5333 p->lsp = lsp;
5334 atomic_inc(&lsp->ls_count);
5335 /* Ensure we don't close file until we're done freeing locks! */
5336 p->ctx = get_nfs_open_context(ctx);
5337 memcpy(&p->fl, fl, sizeof(p->fl));
5338 p->server = NFS_SERVER(inode);
5339 return p;
5340}
5341
06f814a3 5342static void nfs4_locku_release_calldata(void *data)
faf5f49c 5343{
963d8fe5 5344 struct nfs4_unlockdata *calldata = data;
911d1aaf 5345 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5346 nfs4_put_lock_state(calldata->lsp);
5347 put_nfs_open_context(calldata->ctx);
5348 kfree(calldata);
faf5f49c
TM		 5349}
5350
963d8fe5 5351static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5352{
963d8fe5 5353 struct nfs4_unlockdata *calldata = data;
faf5f49c 5354
14516c3a
TM		 5355 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5356 return;
faf5f49c
TM		 5357 switch (task->tk_status) {
5358 case 0:
f597c537
TM		 5359 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5360 &calldata->res.stateid);
26e976a8 5361 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5362 break;
9e33bed5
TM		 5363 case -NFS4ERR_BAD_STATEID:
5364 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5365 case -NFS4ERR_STALE_STATEID:
5366 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5367 break;
5368 default:
9e33bed5 5369 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5370 rpc_restart_call_prepare(task);
faf5f49c 5371 }
2b1bc308 5372 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5373}
5374
4ce70ada 5375static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5376{
4ce70ada 5377 struct nfs4_unlockdata *calldata = data;
faf5f49c 5378
911d1aaf 5379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5380 goto out_wait;
795a88c9 5381 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5382 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5383 goto out_no_action;
faf5f49c 5384 }
26e976a8 5385 calldata->timestamp = jiffies;
035168ab 5386 if (nfs4_setup_sequence(calldata->server,
a893693c 5387 &calldata->arg.seq_args,
2240a9e2
TM		 5388 &calldata->res.seq_res,
5389 task) != 0)
5390 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5391 return;
5392out_no_action:
5393 task->tk_action = NULL;
5394out_wait:
5395 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5396}
5397
963d8fe5 5398static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5399 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5400 .rpc_call_done = nfs4_locku_done,
06f814a3 5401 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5402};
5403
a5d16a4d
TM		 5404static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5405 struct nfs_open_context *ctx,
5406 struct nfs4_lock_state *lsp,
5407 struct nfs_seqid *seqid)
5408{
5409 struct nfs4_unlockdata *data;
5138fde0
TM		 5410 struct rpc_message msg = {
5411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5412 .rpc_cred = ctx->cred,
5413 };
c970aa85
TM		 5414 struct rpc_task_setup task_setup_data = {
5415 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5416 .rpc_message = &msg,
c970aa85 5417 .callback_ops = &nfs4_locku_ops,
101070ca 5418 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5419 .flags = RPC_TASK_ASYNC,
5420 };
a5d16a4d 5421
fa940720
WAA		 5422 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5423 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5424
137d6aca
FF		 5425 /* Ensure this is an unlock - when canceling a lock, the
5426 * canceled lock is passed in, and it won't be an unlock.
5427 */
5428 fl->fl_type = F_UNLCK;
5429
a5d16a4d
TM		 5430 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5431 if (data == NULL) {
5432 nfs_free_seqid(seqid);
5433 return ERR_PTR(-ENOMEM);
5434 }
5435
a9c92d6b 5436 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5437 msg.rpc_argp = &data->arg;
5438 msg.rpc_resp = &data->res;
c970aa85
TM		 5439 task_setup_data.callback_data = data;
5440 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5441}
5442
faf5f49c
TM		 5443static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5444{
65b62a29
TM		 5445 struct inode *inode = state->inode;
5446 struct nfs4_state_owner *sp = state->owner;
5447 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5448 struct nfs_seqid *seqid;
1da177e4 5449 struct nfs4_lock_state *lsp;
06f814a3
TM		 5450 struct rpc_task *task;
5451 int status = 0;
536ff0f8 5452 unsigned char fl_flags = request->fl_flags;
faf5f49c 5453
8d0a8a9d 5454 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5455 /* Unlock _before_ we do the RPC call */
5456 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5457 /* Exclude nfs_delegation_claim_locks() */
5458 mutex_lock(&sp->so_delegreturn_mutex);
5459 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5460 down_read(&nfsi->rwsem);
5461 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5462 up_read(&nfsi->rwsem);
65b62a29 5463 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5464 goto out;
19e03c57
TM		 5465 }
5466 up_read(&nfsi->rwsem);
65b62a29 5467 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5468 if (status != 0)
9b073574
TM		 5469 goto out;
5470 /* Is this a delegated lock? */
8d0a8a9d 5471 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5472 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5473 goto out;
8535b2be 5474 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5475 status = -ENOMEM;
911d1aaf 5476 if (seqid == NULL)
9b073574 5477 goto out;
cd3758e3 5478 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5479 status = PTR_ERR(task);
5480 if (IS_ERR(task))
9b073574 5481 goto out;
a5d16a4d 5482 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5483 rpc_put_task(task);
9b073574 5484out:
536ff0f8 5485 request->fl_flags = fl_flags;
d1b748a5 5486 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5487 return status;
5488}
5489
a5d16a4d
TM		 5490struct nfs4_lockdata {
5491 struct nfs_lock_args arg;
5492 struct nfs_lock_res res;
5493 struct nfs4_lock_state *lsp;
5494 struct nfs_open_context *ctx;
5495 struct file_lock fl;
26e976a8 5496 unsigned long timestamp;
a5d16a4d
TM		 5497 int rpc_status;
5498 int cancelled;
66179efe 5499 struct nfs_server *server;
a5d16a4d
TM		 5500};
5501
5502static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5503 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5504 gfp_t gfp_mask)
1da177e4 5505{
a5d16a4d
TM		 5506 struct nfs4_lockdata *p;
5507 struct inode *inode = lsp->ls_state->inode;
1da177e4 5508 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5509
8535b2be 5510 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5511 if (p == NULL)
5512 return NULL;
5513
5514 p->arg.fh = NFS_FH(inode);
5515 p->arg.fl = &p->fl;
8535b2be 5516 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5517 if (p->arg.open_seqid == NULL)
5518 goto out_free;
8535b2be 5519 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5520 if (p->arg.lock_seqid == NULL)
2f74c0a0 5521 goto out_free_seqid;
a5d16a4d 5522 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5523 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5524 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5525 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5526 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5527 p->lsp = lsp;
66179efe 5528 p->server = server;
a5d16a4d
TM		 5529 atomic_inc(&lsp->ls_count);
5530 p->ctx = get_nfs_open_context(ctx);
5531 memcpy(&p->fl, fl, sizeof(p->fl));
5532 return p;
2f74c0a0
TM		 5533out_free_seqid:
5534 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5535out_free:
5536 kfree(p);
5537 return NULL;
5538}
5539
5540static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5541{
5542 struct nfs4_lockdata *data = calldata;
5543 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5544
3110ff80 5545 dprintk("%s: begin!\n", __func__);
2f74c0a0 5546 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5547 goto out_wait;
a5d16a4d
TM		 5548 /* Do we need to do an open_to_lock_owner? */
5549 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5550 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5551 goto out_release_lock_seqid;
8fe72bac 5552 }
8e472f33 5553 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5554 data->arg.new_lock_owner = 1;
c1d51931 5555 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5556 } else
5557 data->arg.new_lock_owner = 0;
5d422301
TM		 5558 if (!nfs4_valid_open_stateid(state)) {
5559 data->rpc_status = -EBADF;
5560 task->tk_action = NULL;
5561 goto out_release_open_seqid;
5562 }
26e976a8 5563 data->timestamp = jiffies;
035168ab
TM		 5564 if (nfs4_setup_sequence(data->server,
5565 &data->arg.seq_args,
2240a9e2 5566 &data->res.seq_res,
d9afbd1b 5567 task) == 0)
66179efe 5568 return;
5d422301 5569out_release_open_seqid:
2240a9e2
TM		 5570 nfs_release_seqid(data->arg.open_seqid);
5571out_release_lock_seqid:
5572 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5573out_wait:
5574 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5575 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5576}
5577
a5d16a4d
TM		 5578static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5579{
5580 struct nfs4_lockdata *data = calldata;
5581
3110ff80 5582 dprintk("%s: begin!\n", __func__);
a5d16a4d 5583
14516c3a
TM		 5584 if (!nfs4_sequence_done(task, &data->res.seq_res))
5585 return;
66179efe 5586
a5d16a4d 5587 data->rpc_status = task->tk_status;
a5d16a4d 5588 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5589 if (data->rpc_status == 0)
5590 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5591 else
5592 goto out;
5593 }
5594 if (data->rpc_status == 0) {
f597c537 5595 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5596 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5597 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5598 }
a5d16a4d 5599out:
3110ff80 5600 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5601}
5602
5603static void nfs4_lock_release(void *calldata)
5604{
5605 struct nfs4_lockdata *data = calldata;
5606
3110ff80 5607 dprintk("%s: begin!\n", __func__);
2f74c0a0 5608 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5609 if (data->cancelled != 0) {
5610 struct rpc_task *task;
5611 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5612 data->arg.lock_seqid);
5613 if (!IS_ERR(task))
bf294b41 5614 rpc_put_task_async(task);
3110ff80 5615 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5616 } else
5617 nfs_free_seqid(data->arg.lock_seqid);
5618 nfs4_put_lock_state(data->lsp);
5619 put_nfs_open_context(data->ctx);
5620 kfree(data);
3110ff80 5621 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5622}
5623
5624static const struct rpc_call_ops nfs4_lock_ops = {
5625 .rpc_call_prepare = nfs4_lock_prepare,
5626 .rpc_call_done = nfs4_lock_done,
5627 .rpc_release = nfs4_lock_release,
5628};
5629
2bee72a6
TM		 5630static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5631{
2bee72a6
TM		 5632 switch (error) {
5633 case -NFS4ERR_ADMIN_REVOKED:
5634 case -NFS4ERR_BAD_STATEID:
ecac799a 5635 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5636 if (new_lock_owner != 0 ||
795a88c9 5637 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5638 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5639 break;
5640 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5641 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5642 case -NFS4ERR_EXPIRED:
5643 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5644 };
5645}
5646
afe6c27c 5647static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5648{
5649 struct nfs4_lockdata *data;
5650 struct rpc_task *task;
5138fde0
TM		 5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5653 .rpc_cred = state->owner->so_cred,
5654 };
c970aa85
TM		 5655 struct rpc_task_setup task_setup_data = {
5656 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5657 .rpc_message = &msg,
c970aa85 5658 .callback_ops = &nfs4_lock_ops,
101070ca 5659 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5660 .flags = RPC_TASK_ASYNC,
5661 };
a5d16a4d
TM		 5662 int ret;
5663
3110ff80 5664 dprintk("%s: begin!\n", __func__);
cd3758e3 5665 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5666 fl->fl_u.nfs4_fl.owner,
5667 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5668 if (data == NULL)
5669 return -ENOMEM;
5670 if (IS_SETLKW(cmd))
5671 data->arg.block = 1;
a9c92d6b 5672 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5673 msg.rpc_argp = &data->arg;
5674 msg.rpc_resp = &data->res;
c970aa85 5675 task_setup_data.callback_data = data;
8fe72bac
TM		 5676 if (recovery_type > NFS_LOCK_NEW) {
5677 if (recovery_type == NFS_LOCK_RECLAIM)
5678 data->arg.reclaim = NFS_LOCK_RECLAIM;
5679 nfs4_set_sequence_privileged(&data->arg.seq_args);
5680 }
c970aa85 5681 task = rpc_run_task(&task_setup_data);
7a1218a2 5682 if (IS_ERR(task))
a5d16a4d 5683 return PTR_ERR(task);
a5d16a4d
TM		 5684 ret = nfs4_wait_for_completion_rpc_task(task);
5685 if (ret == 0) {
5686 ret = data->rpc_status;
2bee72a6
TM		 5687 if (ret)
5688 nfs4_handle_setlk_error(data->server, data->lsp,
5689 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5690 } else
5691 data->cancelled = 1;
e6b3c4db 5692 rpc_put_task(task);
3110ff80 5693 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5694 return ret;
1da177e4
LT		 5695}
5696
5697static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5698{
202b50dc 5699 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5700 struct nfs4_exception exception = {
5701 .inode = state->inode,
5702 };
202b50dc
TM		 5703 int err;
5704
5705 do {
42a2d13e
TM		 5706 /* Cache the lock if possible... */
5707 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5708 return 0;
afe6c27c 5709 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5710 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5711 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5712 break;
5713 nfs4_handle_exception(server, err, &exception);
5714 } while (exception.retry);
5715 return err;
1da177e4
LT		 5716}
5717
5718static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5719{
202b50dc 5720 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5721 struct nfs4_exception exception = {
5722 .inode = state->inode,
5723 };
202b50dc
TM		 5724 int err;
5725
6bfc93ef
TM		 5726 err = nfs4_set_lock_state(state, request);
5727 if (err != 0)
5728 return err;
f6de7a39 5729 if (!recover_lost_locks) {
ef1820f9
N		 5730 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5731 return 0;
5732 }
202b50dc 5733 do {
42a2d13e
TM		 5734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5735 return 0;
afe6c27c 5736 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5737 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5738 switch (err) {
5739 default:
5740 goto out;
5741 case -NFS4ERR_GRACE:
5742 case -NFS4ERR_DELAY:
5743 nfs4_handle_exception(server, err, &exception);
5744 err = 0;
5745 }
202b50dc 5746 } while (exception.retry);
a9ed2e25 5747out:
202b50dc 5748 return err;
1da177e4
LT		 5749}
5750
f062eb6c 5751#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5752/**
5753 * nfs41_check_expired_locks - possibly free a lock stateid
5754 *
5755 * @state: NFSv4 state for an inode
5756 *
5757 * Returns NFS_OK if recovery for this stateid is now finished.
5758 * Otherwise a negative NFS4ERR value is returned.
5759 */
b01dd1d8 5760static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5761{
eb64cf96 5762 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5763 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5764 struct nfs_server *server = NFS_SERVER(state->inode);
5765
b01dd1d8 5766 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5767 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5768 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5769
5770 status = nfs41_test_stateid(server,
5771 &lsp->ls_stateid,
5772 cred);
08cb47fa 5773 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5774 if (status != NFS_OK) {
3e60ffdd
CL		 5775 /* Free the stateid unless the server
5776 * informs us the stateid is unrecognized. */
89af2739
CL		 5777 if (status != -NFS4ERR_BAD_STATEID)
5778 nfs41_free_stateid(server,
ab7cb0df
TM		 5779 &lsp->ls_stateid,
5780 cred);
795a88c9 5781 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5782 ret = status;
5783 }
5784 }
5785 };
5786
5787 return ret;
5788}
5789
5790static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5791{
5792 int status = NFS_OK;
5793
5794 if (test_bit(LK_STATE_IN_USE, &state->flags))
5795 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5796 if (status != NFS_OK)
5797 status = nfs4_lock_expired(state, request);
5798 return status;
f062eb6c
BS		 5799}
5800#endif
5801
1da177e4
LT		 5802static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5803{
9a99af49 5804 struct nfs4_state_owner *sp = state->owner;
19e03c57 5805 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5806 unsigned char fl_flags = request->fl_flags;
9a99af49 5807 unsigned int seq;
8e469ebd 5808 int status = -ENOLCK;
1da177e4 5809
8e469ebd
TM		 5810 if ((fl_flags & FL_POSIX) &&
5811 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5812 goto out;
6bfc93ef 5813 /* Is this a delegated open? */
6bfc93ef
TM		 5814 status = nfs4_set_lock_state(state, request);
5815 if (status != 0)
5816 goto out;
01c3b861
TM		 5817 request->fl_flags |= FL_ACCESS;
5818 status = do_vfs_lock(request->fl_file, request);
5819 if (status < 0)
5820 goto out;
19e03c57 5821 down_read(&nfsi->rwsem);
01c3b861 5822 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5823 /* Yes: cache locks! */
01c3b861 5824 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5825 request->fl_flags = fl_flags & ~FL_SLEEP;
5826 status = do_vfs_lock(request->fl_file, request);
5827 goto out_unlock;
01c3b861 5828 }
9a99af49
TM		 5829 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5830 up_read(&nfsi->rwsem);
afe6c27c 5831 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5832 if (status != 0)
9a99af49
TM		 5833 goto out;
5834 down_read(&nfsi->rwsem);
5835 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5836 status = -NFS4ERR_DELAY;
01c3b861 5837 goto out_unlock;
9a99af49 5838 }
6bfc93ef 5839 /* Note: we always want to sleep here! */
01c3b861 5840 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5841 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5842 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5843 "manager!\n", __func__);
01c3b861 5844out_unlock:
19e03c57 5845 up_read(&nfsi->rwsem);
01c3b861
TM		 5846out:
5847 request->fl_flags = fl_flags;
1da177e4
LT		 5848 return status;
5849}
5850
5851static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5852{
a1d0b5ee
TM		 5853 struct nfs4_exception exception = {
5854 .state = state,
05ffe24f 5855 .inode = state->inode,
a1d0b5ee 5856 };
1da177e4
LT		 5857 int err;
5858
5859 do {
965b5d67 5860 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5861 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5862 if (err == -NFS4ERR_DENIED)
5863 err = -EAGAIN;
1da177e4 5864 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5865 err, &exception);
1da177e4
LT		 5866 } while (exception.retry);
5867 return err;
5868}
5869
5870static int
5871nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5872{
5873 struct nfs_open_context *ctx;
5874 struct nfs4_state *state;
5875 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5876 int status;
5877
5878 /* verify open state */
cd3758e3 5879 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5880 state = ctx->state;
5881
5882 if (request->fl_start < 0 || request->fl_end < 0)
5883 return -EINVAL;
5884
d953126a
TM		 5885 if (IS_GETLK(cmd)) {
5886 if (state != NULL)
5887 return nfs4_proc_getlk(state, F_GETLK, request);
5888 return 0;
5889 }
1da177e4
LT		 5890
5891 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5892 return -EINVAL;
5893
d953126a
TM		 5894 if (request->fl_type == F_UNLCK) {
5895 if (state != NULL)
5896 return nfs4_proc_unlck(state, cmd, request);
5897 return 0;
5898 }
1da177e4 5899
d953126a
TM		 5900 if (state == NULL)
5901 return -ENOLCK;
55725513
TM		 5902 /*
5903 * Don't rely on the VFS having checked the file open mode,
5904 * since it won't do this for flock() locks.
5905 */
f44106e2 5906 switch (request->fl_type) {
55725513
TM		 5907 case F_RDLCK:
5908 if (!(filp->f_mode & FMODE_READ))
5909 return -EBADF;
5910 break;
5911 case F_WRLCK:
5912 if (!(filp->f_mode & FMODE_WRITE))
5913 return -EBADF;
5914 }
5915
1da177e4
LT		 5916 do {
5917 status = nfs4_proc_setlk(state, cmd, request);
5918 if ((status != -EAGAIN) || IS_SETLK(cmd))
5919 break;
5920 timeout = nfs4_set_lock_task_retry(timeout);
5921 status = -ERESTARTSYS;
5922 if (signalled())
5923 break;
5924 } while(status < 0);
1da177e4
LT		 5925 return status;
5926}
5927
db4f2e63 5928int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5929{
5930 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5931 int err;
5932
5933 err = nfs4_set_lock_state(state, fl);
5934 if (err != 0)
db4f2e63 5935 return err;
4a706fa0 5936 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5937 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5938}
6b3b5496 5939
cf470c3e
TM		 5940struct nfs_release_lockowner_data {
5941 struct nfs4_lock_state *lsp;
5ae67c4f 5942 struct nfs_server *server;
cf470c3e 5943 struct nfs_release_lockowner_args args;
b7e63a10 5944 struct nfs_release_lockowner_res res;
60ea6812 5945 unsigned long timestamp;
cf470c3e
TM		 5946};
5947
fbd4bfd1
CL		 5948static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5949{
5950 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5951 struct nfs_server *server = data->server;
5952 nfs40_setup_sequence(server, &data->args.seq_args,
5953 &data->res.seq_res, task);
5954 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5955 data->timestamp = jiffies;
fbd4bfd1
CL		 5956}
5957
5958static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5959{
5960 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5961 struct nfs_server *server = data->server;
5962
b7e63a10 5963 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5964
5965 switch (task->tk_status) {
5966 case 0:
5967 renew_lease(server, data->timestamp);
5968 break;
5969 case -NFS4ERR_STALE_CLIENTID:
5970 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5971 nfs4_schedule_lease_recovery(server->nfs_client);
5972 break;
60ea6812
CL		 5973 case -NFS4ERR_LEASE_MOVED:
5974 case -NFS4ERR_DELAY:
5975 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5976 rpc_restart_call_prepare(task);
5977 }
fbd4bfd1
CL		 5978}
5979
d3c7b7cc
TM		 5980static void nfs4_release_lockowner_release(void *calldata)
5981{
cf470c3e 5982 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5983 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5984 kfree(calldata);
5985}
5986
17280175 5987static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5988 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5989 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5990 .rpc_release = nfs4_release_lockowner_release,
5991};
5992
f1cdae87
JL		 5993static void
5994nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5995{
cf470c3e 5996 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5997 struct rpc_message msg = {
5998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5999 };
6000
6001 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6002 return;
fbd4bfd1 6003
cf470c3e
TM		 6004 data = kmalloc(sizeof(*data), GFP_NOFS);
6005 if (!data)
f1cdae87 6006 return;
cf470c3e 6007 data->lsp = lsp;
5ae67c4f 6008 data->server = server;
cf470c3e
TM		 6009 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6010 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6011 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6012
cf470c3e 6013 msg.rpc_argp = &data->args;
b7e63a10
TM		 6014 msg.rpc_resp = &data->res;
6015 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6016 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6017}
6018
aa1870af
BF		 6019#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6020
64c2ce8b
AK		 6021static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6022 const void *buf, size_t buflen,
6023 int flags, int type)
6b3b5496 6024{
64c2ce8b
AK		 6025 if (strcmp(key, "") != 0)
6026 return -EINVAL;
4b580ee3 6027
64c2ce8b 6028 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6029}
6030
64c2ce8b
AK		 6031static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6032 void *buf, size_t buflen, int type)
6b3b5496 6033{
64c2ce8b
AK		 6034 if (strcmp(key, "") != 0)
6035 return -EINVAL;
aa1870af 6036
64c2ce8b 6037 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6038}
6039
64c2ce8b
AK		 6040static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6041 size_t list_len, const char *name,
6042 size_t name_len, int type)
6b3b5496 6043{
64c2ce8b 6044 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6045
096455a2
BF		 6046 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6047 return 0;
64c2ce8b
AK		 6048
6049 if (list && len <= list_len)
6050 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6051 return len;
6b3b5496
BF		 6052}
6053
c9bccef6
DQ		 6054#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6055static inline int nfs4_server_supports_labels(struct nfs_server *server)
6056{
6057 return server->caps & NFS_CAP_SECURITY_LABEL;
6058}
6059
6060static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6061 const void *buf, size_t buflen,
6062 int flags, int type)
6063{
6064 if (security_ismaclabel(key))
6065 return nfs4_set_security_label(dentry, buf, buflen);
6066
6067 return -EOPNOTSUPP;
6068}
6069
6070static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6071 void *buf, size_t buflen, int type)
6072{
6073 if (security_ismaclabel(key))
6074 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6075 return -EOPNOTSUPP;
6076}
6077
6078static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6079 size_t list_len, const char *name,
6080 size_t name_len, int type)
6081{
6082 size_t len = 0;
6083
6084 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6085 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6086 if (list && len <= list_len)
6087 security_inode_listsecurity(dentry->d_inode, list, len);
6088 }
6089 return len;
6090}
6091
6092static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6093 .prefix = XATTR_SECURITY_PREFIX,
6094 .list = nfs4_xattr_list_nfs4_label,
6095 .get = nfs4_xattr_get_nfs4_label,
6096 .set = nfs4_xattr_set_nfs4_label,
6097};
6098#endif
6099
6100
533eb461
AA		 6101/*
6102 * nfs_fhget will use either the mounted_on_fileid or the fileid
6103 */
69aaaae1
TM		 6104static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6105{
533eb461
AA		 6106 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6107 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6108 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6109 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6110 return;
6111
6112 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6113 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6114 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6115 fattr->nlink = 2;
6116}
6117
f05d147f
BS		 6118static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6119 const struct qstr *name,
6120 struct nfs4_fs_locations *fs_locations,
6121 struct page *page)
683b57b4
TM		 6122{
6123 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6124 u32 bitmask[3] = {
361e624f 6125 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6126 };
6127 struct nfs4_fs_locations_arg args = {
6128 .dir_fh = NFS_FH(dir),
c228fd3a 6129 .name = name,
683b57b4
TM		 6130 .page = page,
6131 .bitmask = bitmask,
6132 };
22958463
BH		 6133 struct nfs4_fs_locations_res res = {
6134 .fs_locations = fs_locations,
6135 };
683b57b4
TM		 6136 struct rpc_message msg = {
6137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6138 .rpc_argp = &args,
22958463 6139 .rpc_resp = &res,
683b57b4
TM		 6140 };
6141 int status;
6142
3110ff80 6143 dprintk("%s: start\n", __func__);
533eb461
AA		 6144
6145 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6146 * is not supported */
6147 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6148 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6149 else
6150 bitmask[0] |= FATTR4_WORD0_FILEID;
6151
c228fd3a 6152 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6153 fs_locations->server = server;
830b8e33 6154 fs_locations->nlocations = 0;
f05d147f 6155 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6156 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6157 return status;
6158}
6159
f05d147f
BS		 6160int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6161 const struct qstr *name,
6162 struct nfs4_fs_locations *fs_locations,
6163 struct page *page)
db0a9593
BS		 6164{
6165 struct nfs4_exception exception = { };
6166 int err;
6167 do {
078ea3df
TM		 6168 err = _nfs4_proc_fs_locations(client, dir, name,
6169 fs_locations, page);
6170 trace_nfs4_get_fs_locations(dir, name, err);
6171 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6172 &exception);
6173 } while (exception.retry);
6174 return err;
6175}
6176
b03d735b
CL		 6177/*
6178 * This operation also signals the server that this client is
6179 * performing migration recovery. The server can stop returning
6180 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6181 * appended to this compound to identify the client ID which is
6182 * performing recovery.
6183 */
6184static int _nfs40_proc_get_locations(struct inode *inode,
6185 struct nfs4_fs_locations *locations,
6186 struct page *page, struct rpc_cred *cred)
6187{
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct rpc_clnt *clnt = server->client;
6190 u32 bitmask[2] = {
6191 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6192 };
6193 struct nfs4_fs_locations_arg args = {
6194 .clientid = server->nfs_client->cl_clientid,
6195 .fh = NFS_FH(inode),
6196 .page = page,
6197 .bitmask = bitmask,
6198 .migration = 1, /* skip LOOKUP */
6199 .renew = 1, /* append RENEW */
6200 };
6201 struct nfs4_fs_locations_res res = {
6202 .fs_locations = locations,
6203 .migration = 1,
6204 .renew = 1,
6205 };
6206 struct rpc_message msg = {
6207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6208 .rpc_argp = &args,
6209 .rpc_resp = &res,
6210 .rpc_cred = cred,
6211 };
6212 unsigned long now = jiffies;
6213 int status;
6214
6215 nfs_fattr_init(&locations->fattr);
6216 locations->server = server;
6217 locations->nlocations = 0;
6218
6219 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6220 nfs4_set_sequence_privileged(&args.seq_args);
6221 status = nfs4_call_sync_sequence(clnt, server, &msg,
6222 &args.seq_args, &res.seq_res);
6223 if (status)
6224 return status;
6225
6226 renew_lease(server, now);
6227 return 0;
6228}
6229
6230#ifdef CONFIG_NFS_V4_1
6231
6232/*
6233 * This operation also signals the server that this client is
6234 * performing migration recovery. The server can stop asserting
6235 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6236 * performing this operation is identified in the SEQUENCE
6237 * operation in this compound.
6238 *
6239 * When the client supports GETATTR(fs_locations_info), it can
6240 * be plumbed in here.
6241 */
6242static int _nfs41_proc_get_locations(struct inode *inode,
6243 struct nfs4_fs_locations *locations,
6244 struct page *page, struct rpc_cred *cred)
6245{
6246 struct nfs_server *server = NFS_SERVER(inode);
6247 struct rpc_clnt *clnt = server->client;
6248 u32 bitmask[2] = {
6249 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6250 };
6251 struct nfs4_fs_locations_arg args = {
6252 .fh = NFS_FH(inode),
6253 .page = page,
6254 .bitmask = bitmask,
6255 .migration = 1, /* skip LOOKUP */
6256 };
6257 struct nfs4_fs_locations_res res = {
6258 .fs_locations = locations,
6259 .migration = 1,
6260 };
6261 struct rpc_message msg = {
6262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6263 .rpc_argp = &args,
6264 .rpc_resp = &res,
6265 .rpc_cred = cred,
6266 };
6267 int status;
6268
6269 nfs_fattr_init(&locations->fattr);
6270 locations->server = server;
6271 locations->nlocations = 0;
6272
6273 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6274 nfs4_set_sequence_privileged(&args.seq_args);
6275 status = nfs4_call_sync_sequence(clnt, server, &msg,
6276 &args.seq_args, &res.seq_res);
6277 if (status == NFS4_OK &&
6278 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6279 status = -NFS4ERR_LEASE_MOVED;
6280 return status;
6281}
6282
6283#endif /* CONFIG_NFS_V4_1 */
6284
6285/**
6286 * nfs4_proc_get_locations - discover locations for a migrated FSID
6287 * @inode: inode on FSID that is migrating
6288 * @locations: result of query
6289 * @page: buffer
6290 * @cred: credential to use for this operation
6291 *
6292 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6293 * operation failed, or a negative errno if a local error occurred.
6294 *
6295 * On success, "locations" is filled in, but if the server has
6296 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6297 * asserted.
6298 *
6299 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6300 * from this client that require migration recovery.
6301 */
6302int nfs4_proc_get_locations(struct inode *inode,
6303 struct nfs4_fs_locations *locations,
6304 struct page *page, struct rpc_cred *cred)
6305{
6306 struct nfs_server *server = NFS_SERVER(inode);
6307 struct nfs_client *clp = server->nfs_client;
6308 const struct nfs4_mig_recovery_ops *ops =
6309 clp->cl_mvops->mig_recovery_ops;
6310 struct nfs4_exception exception = { };
6311 int status;
6312
6313 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6314 (unsigned long long)server->fsid.major,
6315 (unsigned long long)server->fsid.minor,
6316 clp->cl_hostname);
6317 nfs_display_fhandle(NFS_FH(inode), __func__);
6318
6319 do {
6320 status = ops->get_locations(inode, locations, page, cred);
6321 if (status != -NFS4ERR_DELAY)
6322 break;
6323 nfs4_handle_exception(server, status, &exception);
6324 } while (exception.retry);
6325 return status;
6326}
6327
44c99933
CL		 6328/*
6329 * This operation also signals the server that this client is
6330 * performing "lease moved" recovery. The server can stop
6331 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6332 * is appended to this compound to identify the client ID which is
6333 * performing recovery.
6334 */
6335static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6336{
6337 struct nfs_server *server = NFS_SERVER(inode);
6338 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6339 struct rpc_clnt *clnt = server->client;
6340 struct nfs4_fsid_present_arg args = {
6341 .fh = NFS_FH(inode),
6342 .clientid = clp->cl_clientid,
6343 .renew = 1, /* append RENEW */
6344 };
6345 struct nfs4_fsid_present_res res = {
6346 .renew = 1,
6347 };
6348 struct rpc_message msg = {
6349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6350 .rpc_argp = &args,
6351 .rpc_resp = &res,
6352 .rpc_cred = cred,
6353 };
6354 unsigned long now = jiffies;
6355 int status;
6356
6357 res.fh = nfs_alloc_fhandle();
6358 if (res.fh == NULL)
6359 return -ENOMEM;
6360
6361 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6362 nfs4_set_sequence_privileged(&args.seq_args);
6363 status = nfs4_call_sync_sequence(clnt, server, &msg,
6364 &args.seq_args, &res.seq_res);
6365 nfs_free_fhandle(res.fh);
6366 if (status)
6367 return status;
6368
6369 do_renew_lease(clp, now);
6370 return 0;
6371}
6372
6373#ifdef CONFIG_NFS_V4_1
6374
6375/*
6376 * This operation also signals the server that this client is
6377 * performing "lease moved" recovery. The server can stop asserting
6378 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6379 * this operation is identified in the SEQUENCE operation in this
6380 * compound.
6381 */
6382static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6383{
6384 struct nfs_server *server = NFS_SERVER(inode);
6385 struct rpc_clnt *clnt = server->client;
6386 struct nfs4_fsid_present_arg args = {
6387 .fh = NFS_FH(inode),
6388 };
6389 struct nfs4_fsid_present_res res = {
6390 };
6391 struct rpc_message msg = {
6392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6393 .rpc_argp = &args,
6394 .rpc_resp = &res,
6395 .rpc_cred = cred,
6396 };
6397 int status;
6398
6399 res.fh = nfs_alloc_fhandle();
6400 if (res.fh == NULL)
6401 return -ENOMEM;
6402
6403 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6404 nfs4_set_sequence_privileged(&args.seq_args);
6405 status = nfs4_call_sync_sequence(clnt, server, &msg,
6406 &args.seq_args, &res.seq_res);
6407 nfs_free_fhandle(res.fh);
6408 if (status == NFS4_OK &&
6409 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6410 status = -NFS4ERR_LEASE_MOVED;
6411 return status;
6412}
6413
6414#endif /* CONFIG_NFS_V4_1 */
6415
6416/**
6417 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6418 * @inode: inode on FSID to check
6419 * @cred: credential to use for this operation
6420 *
6421 * Server indicates whether the FSID is present, moved, or not
6422 * recognized. This operation is necessary to clear a LEASE_MOVED
6423 * condition for this client ID.
6424 *
6425 * Returns NFS4_OK if the FSID is present on this server,
6426 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6427 * NFS4ERR code if some error occurred on the server, or a
6428 * negative errno if a local failure occurred.
6429 */
6430int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6431{
6432 struct nfs_server *server = NFS_SERVER(inode);
6433 struct nfs_client *clp = server->nfs_client;
6434 const struct nfs4_mig_recovery_ops *ops =
6435 clp->cl_mvops->mig_recovery_ops;
6436 struct nfs4_exception exception = { };
6437 int status;
6438
6439 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6440 (unsigned long long)server->fsid.major,
6441 (unsigned long long)server->fsid.minor,
6442 clp->cl_hostname);
6443 nfs_display_fhandle(NFS_FH(inode), __func__);
6444
6445 do {
6446 status = ops->fsid_present(inode, cred);
6447 if (status != -NFS4ERR_DELAY)
6448 break;
6449 nfs4_handle_exception(server, status, &exception);
6450 } while (exception.retry);
6451 return status;
6452}
6453
5ec16a85 6454/**
a5250def
WAA		 6455 * If 'use_integrity' is true and the state managment nfs_client
6456 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6457 * and the machine credential as per RFC3530bis and RFC5661 Security
6458 * Considerations sections. Otherwise, just use the user cred with the
6459 * filesystem's rpc_client.
5ec16a85 6460 */
a5250def 6461static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6462{
6463 int status;
6464 struct nfs4_secinfo_arg args = {
6465 .dir_fh = NFS_FH(dir),
6466 .name = name,
6467 };
6468 struct nfs4_secinfo_res res = {
6469 .flavors = flavors,
6470 };
6471 struct rpc_message msg = {
6472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6473 .rpc_argp = &args,
6474 .rpc_resp = &res,
6475 };
a5250def 6476 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6477 struct rpc_cred *cred = NULL;
a5250def
WAA		 6478
6479 if (use_integrity) {
6480 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6481 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6482 msg.rpc_cred = cred;
a5250def 6483 }
5a5ea0d4
BS		 6484
6485 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6486
6487 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6488 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6489
a5250def
WAA		 6490 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6491 &res.seq_res, 0);
5a5ea0d4 6492 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6493
7cb852df
WAA		 6494 if (cred)
6495 put_rpccred(cred);
a5250def 6496
5a5ea0d4
BS		 6497 return status;
6498}
6499
72de53ec
BS		 6500int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6501 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6502{
6503 struct nfs4_exception exception = { };
6504 int err;
6505 do {
a5250def
WAA		 6506 err = -NFS4ERR_WRONGSEC;
6507
6508 /* try to use integrity protection with machine cred */
6509 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6510 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6511
6512 /*
6513 * if unable to use integrity protection, or SECINFO with
6514 * integrity protection returns NFS4ERR_WRONGSEC (which is
6515 * disallowed by spec, but exists in deployed servers) use
6516 * the current filesystem's rpc_client and the user cred.
6517 */
6518 if (err == -NFS4ERR_WRONGSEC)
6519 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6520
078ea3df
TM		 6521 trace_nfs4_secinfo(dir, name, err);
6522 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6523 &exception);
6524 } while (exception.retry);
6525 return err;
6526}
6527
557134a3 6528#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6529/*
6530 * Check the exchange flags returned by the server for invalid flags, having
6531 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6532 * DS flags set.
6533 */
6534static int nfs4_check_cl_exchange_flags(u32 flags)
6535{
6536 if (flags & ~EXCHGID4_FLAG_MASK_R)
6537 goto out_inval;
6538 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6539 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6540 goto out_inval;
6541 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6542 goto out_inval;
6543 return NFS_OK;
6544out_inval:
6545 return -NFS4ERR_INVAL;
6546}
6547
78fe0f41 6548static bool
79d4e1f0
CL		 6549nfs41_same_server_scope(struct nfs41_server_scope *a,
6550 struct nfs41_server_scope *b)
78fe0f41
WAA		 6551{
6552 if (a->server_scope_sz == b->server_scope_sz &&
6553 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6554 return true;
6555
6556 return false;
6557}
6558
7c44f1ae
WAA		 6559/*
6560 * nfs4_proc_bind_conn_to_session()
6561 *
6562 * The 4.1 client currently uses the same TCP connection for the
6563 * fore and backchannel.
6564 */
2cf047c9 6565int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6566{
6567 int status;
6568 struct nfs41_bind_conn_to_session_res res;
6569 struct rpc_message msg = {
6570 .rpc_proc =
6571 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6572 .rpc_argp = clp,
6573 .rpc_resp = &res,
2cf047c9 6574 .rpc_cred = cred,
7c44f1ae
WAA		 6575 };
6576
6577 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6578
6579 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6580 if (unlikely(res.session == NULL)) {
6581 status = -ENOMEM;
6582 goto out;
6583 }
6584
6585 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6586 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6587 if (status == 0) {
6588 if (memcmp(res.session->sess_id.data,
6589 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6590 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6591 status = -EIO;
6592 goto out_session;
6593 }
6594 if (res.dir != NFS4_CDFS4_BOTH) {
6595 dprintk("NFS: %s: Unexpected direction from server\n",
6596 __func__);
6597 status = -EIO;
6598 goto out_session;
6599 }
6600 if (res.use_conn_in_rdma_mode) {
6601 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6602 __func__);
6603 status = -EIO;
6604 goto out_session;
6605 }
6606 }
6607out_session:
6608 kfree(res.session);
6609out:
6610 dprintk("<-- %s status= %d\n", __func__, status);
6611 return status;
6612}
6613
99fe60d0 6614/*
fa940720
WAA		 6615 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6616 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6617 */
6618static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6619 .how = SP4_MACH_CRED,
6620 .enforce.u.words = {
6621 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6622 1 << (OP_EXCHANGE_ID - 32) |
6623 1 << (OP_CREATE_SESSION - 32) |
6624 1 << (OP_DESTROY_SESSION - 32) |
6625 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6626 },
6627 .allow.u.words = {
6628 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6629 1 << (OP_LOCKU) |
6630 1 << (OP_COMMIT),
8b5bee2e 6631 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6632 1 << (OP_SECINFO_NO_NAME - 32) |
6633 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6634 1 << (OP_FREE_STATEID - 32) |
6635 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6636 }
6637};
6638
6639/*
6640 * Select the state protection mode for client `clp' given the server results
6641 * from exchange_id in `sp'.
99fe60d0 6642 *
2031cd1a
WAA		 6643 * Returns 0 on success, negative errno otherwise.
6644 */
6645static int nfs4_sp4_select_mode(struct nfs_client *clp,
6646 struct nfs41_state_protection *sp)
6647{
6648 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6649 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6650 1 << (OP_EXCHANGE_ID - 32) |
6651 1 << (OP_CREATE_SESSION - 32) |
6652 1 << (OP_DESTROY_SESSION - 32) |
6653 1 << (OP_DESTROY_CLIENTID - 32)
6654 };
6655 unsigned int i;
6656
6657 if (sp->how == SP4_MACH_CRED) {
6658 /* Print state protect result */
6659 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6660 for (i = 0; i <= LAST_NFS4_OP; i++) {
6661 if (test_bit(i, sp->enforce.u.longs))
6662 dfprintk(MOUNT, " enforce op %d\n", i);
6663 if (test_bit(i, sp->allow.u.longs))
6664 dfprintk(MOUNT, " allow op %d\n", i);
6665 }
6666
6667 /* make sure nothing is on enforce list that isn't supported */
6668 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6669 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6670 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6671 return -EINVAL;
6672 }
6673 }
6674
6675 /*
6676 * Minimal mode - state operations are allowed to use machine
6677 * credential. Note this already happens by default, so the
6678 * client doesn't have to do anything more than the negotiation.
6679 *
6680 * NOTE: we don't care if EXCHANGE_ID is in the list -
6681 * we're already using the machine cred for exchange_id
6682 * and will never use a different cred.
6683 */
6684 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6685 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6686 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6687 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6688 dfprintk(MOUNT, "sp4_mach_cred:\n");
6689 dfprintk(MOUNT, " minimal mode enabled\n");
6690 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6691 } else {
6692 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6693 return -EINVAL;
6694 }
fa940720
WAA		 6695
6696 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6697 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6698 dfprintk(MOUNT, " cleanup mode enabled\n");
6699 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6700 }
8b5bee2e
WAA		 6701
6702 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6703 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " secinfo mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6706 }
3787d506
WAA		 6707
6708 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6709 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6710 dfprintk(MOUNT, " stateid mode enabled\n");
6711 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6712 }
8c21c62c
WAA		 6713
6714 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6715 dfprintk(MOUNT, " write mode enabled\n");
6716 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6717 }
6718
6719 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6720 dfprintk(MOUNT, " commit mode enabled\n");
6721 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6722 }
2031cd1a
WAA		 6723 }
6724
6725 return 0;
6726}
6727
6728/*
6729 * _nfs4_proc_exchange_id()
6bbb4ae8 6730 *
2031cd1a 6731 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6732 */
2031cd1a
WAA		 6733static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6734 u32 sp4_how)
99fe60d0
BH		 6735{
6736 nfs4_verifier verifier;
6737 struct nfs41_exchange_id_args args = {
cd93710e 6738 .verifier = &verifier,
99fe60d0 6739 .client = clp,
cd3fadec 6740#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6741 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6742 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6743 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6744#else
6745 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6746 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6747#endif
99fe60d0
BH		 6748 };
6749 struct nfs41_exchange_id_res res = {
32b01310 6750 0
99fe60d0
BH		 6751 };
6752 int status;
6753 struct rpc_message msg = {
6754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6755 .rpc_argp = &args,
6756 .rpc_resp = &res,
6757 .rpc_cred = cred,
6758 };
99fe60d0 6759
f092075d 6760 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6761 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6762 sizeof(args.id));
6bbb4ae8
CL		 6763 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6764 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6765 args.id_len, args.id);
99fe60d0 6766
acdeb69d 6767 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6768 GFP_NOFS);
acdeb69d 6769 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6770 status = -ENOMEM;
6771 goto out;
6772 }
78fe0f41 6773
79d4e1f0 6774 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6775 GFP_NOFS);
177313f1 6776 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6777 status = -ENOMEM;
acdeb69d 6778 goto out_server_owner;
abe9a6d5 6779 }
78fe0f41 6780
bbafffd2 6781 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6782 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6783 status = -ENOMEM;
6784 goto out_server_scope;
6785 }
6786
2031cd1a
WAA		 6787 switch (sp4_how) {
6788 case SP4_NONE:
6789 args.state_protect.how = SP4_NONE;
6790 break;
6791
6792 case SP4_MACH_CRED:
6793 args.state_protect = nfs4_sp4_mach_cred_request;
6794 break;
6795
6796 default:
6797 /* unsupported! */
6798 WARN_ON_ONCE(1);
6799 status = -EINVAL;
6800 goto out_server_scope;
6801 }
6802
1bd714f2 6803 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6804 trace_nfs4_exchange_id(clp, status);
177313f1 6805 if (status == 0)
32b01310 6806 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6807
2031cd1a
WAA		 6808 if (status == 0)
6809 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6810
acdeb69d 6811 if (status == 0) {
32b01310
TM		 6812 clp->cl_clientid = res.clientid;
6813 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6814 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6815 clp->cl_seqid = res.seqid;
6816
acdeb69d
CL		 6817 kfree(clp->cl_serverowner);
6818 clp->cl_serverowner = res.server_owner;
6819 res.server_owner = NULL;
78fe0f41 6820
7d2ed9ac 6821 /* use the most recent implementation id */
59155546
CL		 6822 kfree(clp->cl_implid);
6823 clp->cl_implid = res.impl_id;
7d2ed9ac 6824
177313f1 6825 if (clp->cl_serverscope != NULL &&
79d4e1f0 6826 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6827 res.server_scope)) {
6828 dprintk("%s: server_scope mismatch detected\n",
6829 __func__);
6830 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6831 kfree(clp->cl_serverscope);
6832 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6833 }
6834
177313f1 6835 if (clp->cl_serverscope == NULL) {
79d4e1f0 6836 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6837 goto out;
6838 }
32b01310
TM		 6839 } else
6840 kfree(res.impl_id);
7d2ed9ac 6841
acdeb69d
CL		 6842out_server_owner:
6843 kfree(res.server_owner);
7d2ed9ac 6844out_server_scope:
abe9a6d5
WAA		 6845 kfree(res.server_scope);
6846out:
177313f1 6847 if (clp->cl_implid != NULL)
6bbb4ae8 6848 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6849 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6850 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6851 clp->cl_implid->date.seconds,
6852 clp->cl_implid->date.nseconds);
6bbb4ae8 6853 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6854 return status;
6855}
6856
2031cd1a
WAA		 6857/*
6858 * nfs4_proc_exchange_id()
6859 *
6860 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6861 *
6862 * Since the clientid has expired, all compounds using sessions
6863 * associated with the stale clientid will be returning
6864 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6865 * be in some phase of session reset.
6866 *
6867 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6868 */
6869int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6870{
6871 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6872 int status;
6873
6874 /* try SP4_MACH_CRED if krb5i/p */
6875 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6876 authflavor == RPC_AUTH_GSS_KRB5P) {
6877 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6878 if (!status)
6879 return 0;
6880 }
6881
6882 /* try SP4_NONE */
6883 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6884}
6885
66245539
TM		 6886static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6887 struct rpc_cred *cred)
6888{
6889 struct rpc_message msg = {
6890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6891 .rpc_argp = clp,
6892 .rpc_cred = cred,
6893 };
6894 int status;
6895
6896 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6897 trace_nfs4_destroy_clientid(clp, status);
66245539 6898 if (status)
02c67525 6899 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6900 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6901 return status;
6902}
6903
6904static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6905 struct rpc_cred *cred)
6906{
6907 unsigned int loop;
6908 int ret;
6909
6910 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6911 ret = _nfs4_proc_destroy_clientid(clp, cred);
6912 switch (ret) {
6913 case -NFS4ERR_DELAY:
6914 case -NFS4ERR_CLIENTID_BUSY:
6915 ssleep(1);
6916 break;
6917 default:
6918 return ret;
6919 }
6920 }
6921 return 0;
6922}
6923
6924int nfs4_destroy_clientid(struct nfs_client *clp)
6925{
6926 struct rpc_cred *cred;
6927 int ret = 0;
6928
6929 if (clp->cl_mvops->minor_version < 1)
6930 goto out;
6931 if (clp->cl_exchange_flags == 0)
6932 goto out;
05f4c350
CL		 6933 if (clp->cl_preserve_clid)
6934 goto out;
73d8bde5 6935 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6936 ret = nfs4_proc_destroy_clientid(clp, cred);
6937 if (cred)
6938 put_rpccred(cred);
6939 switch (ret) {
6940 case 0:
6941 case -NFS4ERR_STALE_CLIENTID:
6942 clp->cl_exchange_flags = 0;
6943 }
6944out:
6945 return ret;
6946}
6947
2050f0cc
AA		 6948struct nfs4_get_lease_time_data {
6949 struct nfs4_get_lease_time_args *args;
6950 struct nfs4_get_lease_time_res *res;
6951 struct nfs_client *clp;
6952};
6953
6954static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6955 void *calldata)
6956{
2050f0cc
AA		 6957 struct nfs4_get_lease_time_data *data =
6958 (struct nfs4_get_lease_time_data *)calldata;
6959
6960 dprintk("--> %s\n", __func__);
6961 /* just setup sequence, do not trigger session recovery
6962 since we're invoked within one */
d9afbd1b
TM		 6963 nfs41_setup_sequence(data->clp->cl_session,
6964 &data->args->la_seq_args,
6965 &data->res->lr_seq_res,
6966 task);
2050f0cc
AA		 6967 dprintk("<-- %s\n", __func__);
6968}
6969
6970/*
6971 * Called from nfs4_state_manager thread for session setup, so don't recover
6972 * from sequence operation or clientid errors.
6973 */
6974static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6975{
6976 struct nfs4_get_lease_time_data *data =
6977 (struct nfs4_get_lease_time_data *)calldata;
6978
6979 dprintk("--> %s\n", __func__);
14516c3a
TM		 6980 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6981 return;
2050f0cc
AA		 6982 switch (task->tk_status) {
6983 case -NFS4ERR_DELAY:
6984 case -NFS4ERR_GRACE:
6985 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6986 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6987 task->tk_status = 0;
a8a4ae3a
AA		 6988 /* fall through */
6989 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6990 rpc_restart_call_prepare(task);
2050f0cc
AA		 6991 return;
6992 }
2050f0cc
AA		 6993 dprintk("<-- %s\n", __func__);
6994}
6995
17280175 6996static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6997 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6998 .rpc_call_done = nfs4_get_lease_time_done,
6999};
7000
7001int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7002{
7003 struct rpc_task *task;
7004 struct nfs4_get_lease_time_args args;
7005 struct nfs4_get_lease_time_res res = {
7006 .lr_fsinfo = fsinfo,
7007 };
7008 struct nfs4_get_lease_time_data data = {
7009 .args = &args,
7010 .res = &res,
7011 .clp = clp,
7012 };
7013 struct rpc_message msg = {
7014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7015 .rpc_argp = &args,
7016 .rpc_resp = &res,
7017 };
7018 struct rpc_task_setup task_setup = {
7019 .rpc_client = clp->cl_rpcclient,
7020 .rpc_message = &msg,
7021 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7022 .callback_data = &data,
7023 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7024 };
7025 int status;
7026
a9c92d6b 7027 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7028 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7029 dprintk("--> %s\n", __func__);
7030 task = rpc_run_task(&task_setup);
7031
7032 if (IS_ERR(task))
7033 status = PTR_ERR(task);
7034 else {
7035 status = task->tk_status;
7036 rpc_put_task(task);
7037 }
7038 dprintk("<-- %s return %d\n", __func__, status);
7039
7040 return status;
7041}
7042
fc931582
AA		 7043/*
7044 * Initialize the values to be used by the client in CREATE_SESSION
7045 * If nfs4_init_session set the fore channel request and response sizes,
7046 * use them.
7047 *
7048 * Set the back channel max_resp_sz_cached to zero to force the client to
7049 * always set csa_cachethis to FALSE because the current implementation
7050 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7051 */
7052static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7053{
18aad3d5
AA		 7054 unsigned int max_rqst_sz, max_resp_sz;
7055
7056 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7057 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7058
fc931582 7059 /* Fore channel attributes */
18aad3d5
AA		 7060 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7061 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7062 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7063 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7064
7065 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7066 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7067 __func__,
7068 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7069 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7070
7071 /* Back channel attributes */
fc931582
AA		 7072 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7073 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7074 args->bc_attrs.max_resp_sz_cached = 0;
7075 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7076 args->bc_attrs.max_reqs = 1;
7077
7078 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7079 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7080 __func__,
7081 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7082 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7083 args->bc_attrs.max_reqs);
7084}
7085
43c2e885 7086static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7087{
43c2e885
BF		 7088 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7089 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7090
43c2e885
BF		 7091 if (rcvd->max_resp_sz > sent->max_resp_sz)
7092 return -EINVAL;
7093 /*
7094 * Our requested max_ops is the minimum we need; we're not
7095 * prepared to break up compounds into smaller pieces than that.
7096 * So, no point even trying to continue if the server won't
7097 * cooperate:
7098 */
7099 if (rcvd->max_ops < sent->max_ops)
7100 return -EINVAL;
7101 if (rcvd->max_reqs == 0)
7102 return -EINVAL;
b4b9a0c1
VG		 7103 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7104 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7105 return 0;
8d35301d
AA		 7106}
7107
43c2e885
BF		 7108static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7109{
7110 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7111 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7112
43c2e885
BF		 7113 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7114 return -EINVAL;
7115 if (rcvd->max_resp_sz < sent->max_resp_sz)
7116 return -EINVAL;
7117 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7118 return -EINVAL;
7119 /* These would render the backchannel useless: */
b4b9a0c1 7120 if (rcvd->max_ops != sent->max_ops)
43c2e885 7121 return -EINVAL;
b4b9a0c1 7122 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7123 return -EINVAL;
7124 return 0;
7125}
8d35301d 7126
8d35301d
AA		 7127static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7128 struct nfs4_session *session)
7129{
43c2e885 7130 int ret;
8d35301d 7131
43c2e885
BF		 7132 ret = nfs4_verify_fore_channel_attrs(args, session);
7133 if (ret)
7134 return ret;
7135 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7136}
7137
848f5bda
TM		 7138static int _nfs4_proc_create_session(struct nfs_client *clp,
7139 struct rpc_cred *cred)
fc931582
AA		 7140{
7141 struct nfs4_session *session = clp->cl_session;
7142 struct nfs41_create_session_args args = {
7143 .client = clp,
7144 .cb_program = NFS4_CALLBACK,
7145 };
7146 struct nfs41_create_session_res res = {
7147 .client = clp,
7148 };
7149 struct rpc_message msg = {
7150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7151 .rpc_argp = &args,
7152 .rpc_resp = &res,
848f5bda 7153 .rpc_cred = cred,
fc931582
AA		 7154 };
7155 int status;
7156
7157 nfs4_init_channel_attrs(&args);
0f91421e 7158 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7159
1bd714f2 7160 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7161 trace_nfs4_create_session(clp, status);
fc931582 7162
43095d39 7163 if (!status) {
8d35301d
AA		 7164 /* Verify the session's negotiated channel_attrs values */
7165 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7166 /* Increment the clientid slot sequence id */
7167 clp->cl_seqid++;
7168 }
7169
7170 return status;
7171}
7172
7173/*
7174 * Issues a CREATE_SESSION operation to the server.
7175 * It is the responsibility of the caller to verify the session is
7176 * expired before calling this routine.
7177 */
848f5bda 7178int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7179{
7180 int status;
7181 unsigned *ptr;
fc931582
AA		 7182 struct nfs4_session *session = clp->cl_session;
7183
7184 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7185
848f5bda 7186 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7187 if (status)
7188 goto out;
7189
aacd5537
AA		 7190 /* Init or reset the session slot tables */
7191 status = nfs4_setup_session_slot_tables(session);
7192 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7193 if (status)
7194 goto out;
7195
7196 ptr = (unsigned *)&session->sess_id.data[0];
7197 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7198 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7199out:
7200 dprintk("<-- %s\n", __func__);
7201 return status;
7202}
7203
0f3e66c6
AA		 7204/*
7205 * Issue the over-the-wire RPC DESTROY_SESSION.
7206 * The caller must serialize access to this routine.
7207 */
848f5bda
TM		 7208int nfs4_proc_destroy_session(struct nfs4_session *session,
7209 struct rpc_cred *cred)
0f3e66c6 7210{
848f5bda
TM		 7211 struct rpc_message msg = {
7212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7213 .rpc_argp = session,
7214 .rpc_cred = cred,
7215 };
0f3e66c6 7216 int status = 0;
0f3e66c6
AA		 7217
7218 dprintk("--> nfs4_proc_destroy_session\n");
7219
7220 /* session is still being setup */
7221 if (session->clp->cl_cons_state != NFS_CS_READY)
7222 return status;
7223
1bd714f2 7224 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7225 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7226
7227 if (status)
08106ac7 7228 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7229 "Session has been destroyed regardless...\n", status);
7230
7231 dprintk("<-- nfs4_proc_destroy_session\n");
7232 return status;
7233}
7234
fc01cea9
AA		 7235/*
7236 * Renew the cl_session lease.
7237 */
d5f8d3fe
TM		 7238struct nfs4_sequence_data {
7239 struct nfs_client *clp;
7240 struct nfs4_sequence_args args;
7241 struct nfs4_sequence_res res;
7242};
7243
dc96aef9
AB		 7244static void nfs41_sequence_release(void *data)
7245{
d5f8d3fe
TM		 7246 struct nfs4_sequence_data *calldata = data;
7247 struct nfs_client *clp = calldata->clp;
dc96aef9 7248
7135840f
AB		 7249 if (atomic_read(&clp->cl_count) > 1)
7250 nfs4_schedule_state_renewal(clp);
7251 nfs_put_client(clp);
d5f8d3fe 7252 kfree(calldata);
dc96aef9
AB		 7253}
7254
aa5190d0
TM		 7255static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7256{
7257 switch(task->tk_status) {
7258 case -NFS4ERR_DELAY:
aa5190d0
TM		 7259 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7260 return -EAGAIN;
7261 default:
0400a6b0 7262 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7263 }
7264 return 0;
7265}
7266
dc96aef9 7267static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7268{
d5f8d3fe
TM		 7269 struct nfs4_sequence_data *calldata = data;
7270 struct nfs_client *clp = calldata->clp;
fc01cea9 7271
14516c3a
TM		 7272 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7273 return;
fc01cea9 7274
c6d01c6f 7275 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7276 if (task->tk_status < 0) {
7277 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7278 if (atomic_read(&clp->cl_count) == 1)
7279 goto out;
fc01cea9 7280
aa5190d0
TM		 7281 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7282 rpc_restart_call_prepare(task);
fc01cea9
AA		 7283 return;
7284 }
7285 }
fc01cea9 7286 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7287out:
fc01cea9
AA		 7288 dprintk("<-- %s\n", __func__);
7289}
7290
7291static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7292{
d5f8d3fe
TM		 7293 struct nfs4_sequence_data *calldata = data;
7294 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7295 struct nfs4_sequence_args *args;
7296 struct nfs4_sequence_res *res;
7297
fc01cea9
AA		 7298 args = task->tk_msg.rpc_argp;
7299 res = task->tk_msg.rpc_resp;
7300
d9afbd1b 7301 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7302}
7303
7304static const struct rpc_call_ops nfs41_sequence_ops = {
7305 .rpc_call_done = nfs41_sequence_call_done,
7306 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7307 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7308};
7309
8fe72bac
TM		 7310static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7311 struct rpc_cred *cred,
7312 bool is_privileged)
fc01cea9 7313{
d5f8d3fe 7314 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7317 .rpc_cred = cred,
7318 };
71ac6da9
TM		 7319 struct rpc_task_setup task_setup_data = {
7320 .rpc_client = clp->cl_rpcclient,
7321 .rpc_message = &msg,
8fe72bac 7322 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7323 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7324 };
fc01cea9 7325
7135840f 7326 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7327 return ERR_PTR(-EIO);
dfb4f309 7328 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7329 if (calldata == NULL) {
7135840f 7330 nfs_put_client(clp);
71ac6da9 7331 return ERR_PTR(-ENOMEM);
fc01cea9 7332 }
a9c92d6b 7333 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7334 if (is_privileged)
7335 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7336 msg.rpc_argp = &calldata->args;
7337 msg.rpc_resp = &calldata->res;
7338 calldata->clp = clp;
71ac6da9 7339 task_setup_data.callback_data = calldata;
fc01cea9 7340
71ac6da9
TM		 7341 return rpc_run_task(&task_setup_data);
7342}
7343
2f60ea6b 7344static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7345{
7346 struct rpc_task *task;
7347 int ret = 0;
7348
2f60ea6b
TM		 7349 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7350 return 0;
8fe72bac 7351 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7352 if (IS_ERR(task))
7353 ret = PTR_ERR(task);
7354 else
bf294b41 7355 rpc_put_task_async(task);
71ac6da9
TM		 7356 dprintk("<-- %s status=%d\n", __func__, ret);
7357 return ret;
7358}
7359
7360static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7361{
7362 struct rpc_task *task;
7363 int ret;
7364
8fe72bac 7365 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7366 if (IS_ERR(task)) {
7367 ret = PTR_ERR(task);
7368 goto out;
7369 }
7370 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7371 if (!ret) {
7372 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7373
7374 if (task->tk_status == 0)
7375 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7376 ret = task->tk_status;
b4410c2f 7377 }
71ac6da9
TM		 7378 rpc_put_task(task);
7379out:
7380 dprintk("<-- %s status=%d\n", __func__, ret);
7381 return ret;
fc01cea9
AA		 7382}
7383
fce5c838
RL		 7384struct nfs4_reclaim_complete_data {
7385 struct nfs_client *clp;
7386 struct nfs41_reclaim_complete_args arg;
7387 struct nfs41_reclaim_complete_res res;
7388};
7389
7390static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7391{
7392 struct nfs4_reclaim_complete_data *calldata = data;
7393
d9afbd1b
TM		 7394 nfs41_setup_sequence(calldata->clp->cl_session,
7395 &calldata->arg.seq_args,
7396 &calldata->res.seq_res,
7397 task);
fce5c838
RL		 7398}
7399
aa5190d0
TM		 7400static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7401{
7402 switch(task->tk_status) {
7403 case 0:
7404 case -NFS4ERR_COMPLETE_ALREADY:
7405 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7406 break;
7407 case -NFS4ERR_DELAY:
aa5190d0 7408 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7409 /* fall through */
7410 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7411 return -EAGAIN;
7412 default:
0400a6b0 7413 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7414 }
7415 return 0;
7416}
7417
fce5c838
RL		 7418static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7419{
7420 struct nfs4_reclaim_complete_data *calldata = data;
7421 struct nfs_client *clp = calldata->clp;
7422 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7423
7424 dprintk("--> %s\n", __func__);
14516c3a
TM		 7425 if (!nfs41_sequence_done(task, res))
7426 return;
fce5c838 7427
c6d01c6f 7428 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7429 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7430 rpc_restart_call_prepare(task);
7431 return;
7432 }
fce5c838
RL		 7433 dprintk("<-- %s\n", __func__);
7434}
7435
7436static void nfs4_free_reclaim_complete_data(void *data)
7437{
7438 struct nfs4_reclaim_complete_data *calldata = data;
7439
7440 kfree(calldata);
7441}
7442
7443static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7444 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7445 .rpc_call_done = nfs4_reclaim_complete_done,
7446 .rpc_release = nfs4_free_reclaim_complete_data,
7447};
7448
7449/*
7450 * Issue a global reclaim complete.
7451 */
965e9c23
TM		 7452static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7453 struct rpc_cred *cred)
fce5c838
RL		 7454{
7455 struct nfs4_reclaim_complete_data *calldata;
7456 struct rpc_task *task;
7457 struct rpc_message msg = {
7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7459 .rpc_cred = cred,
fce5c838
RL		 7460 };
7461 struct rpc_task_setup task_setup_data = {
7462 .rpc_client = clp->cl_rpcclient,
7463 .rpc_message = &msg,
7464 .callback_ops = &nfs4_reclaim_complete_call_ops,
7465 .flags = RPC_TASK_ASYNC,
7466 };
7467 int status = -ENOMEM;
7468
7469 dprintk("--> %s\n", __func__);
8535b2be 7470 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7471 if (calldata == NULL)
7472 goto out;
7473 calldata->clp = clp;
7474 calldata->arg.one_fs = 0;
fce5c838 7475
a9c92d6b 7476 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7477 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7478 msg.rpc_argp = &calldata->arg;
7479 msg.rpc_resp = &calldata->res;
7480 task_setup_data.callback_data = calldata;
7481 task = rpc_run_task(&task_setup_data);
acf82b85 7482 if (IS_ERR(task)) {
fce5c838 7483 status = PTR_ERR(task);
acf82b85
DC		 7484 goto out;
7485 }
c34c32ea
AA		 7486 status = nfs4_wait_for_completion_rpc_task(task);
7487 if (status == 0)
7488 status = task->tk_status;
fce5c838 7489 rpc_put_task(task);
acf82b85 7490 return 0;
fce5c838
RL		 7491out:
7492 dprintk("<-- %s status=%d\n", __func__, status);
7493 return status;
7494}
b1f69b75
AA		 7495
7496static void
7497nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7498{
7499 struct nfs4_layoutget *lgp = calldata;
c31663d4 7500 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7501 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7502
7503 dprintk("--> %s\n", __func__);
c31663d4
FI		 7504 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7505 * right now covering the LAYOUTGET we are about to send.
7506 * However, that is not so catastrophic, and there seems
7507 * to be no way to prevent it completely.
7508 */
6ba7db34 7509 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7510 &lgp->res.seq_res, task))
b1f69b75 7511 return;
cf7d63f1
FI		 7512 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7513 NFS_I(lgp->args.inode)->layout,
7514 lgp->args.ctx->state)) {
7515 rpc_exit(task, NFS4_OK);
cf7d63f1 7516 }
b1f69b75
AA		 7517}
7518
7519static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7520{
7521 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7522 struct inode *inode = lgp->args.inode;
7523 struct nfs_server *server = NFS_SERVER(inode);
7524 struct pnfs_layout_hdr *lo;
7525 struct nfs4_state *state = NULL;
ed7e5423 7526 unsigned long timeo, now, giveup;
b1f69b75 7527
ed7e5423 7528 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7529
6ba7db34 7530 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7531 goto out;
b1f69b75
AA		 7532
7533 switch (task->tk_status) {
7534 case 0:
ee314c2a 7535 goto out;
ed7e5423
BH		 7536 /*
7537 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7538 * (or clients) writing to the same RAID stripe
7539 */
b1f69b75 7540 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7541 /*
7542 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7543 * existing layout before getting a new one).
7544 */
b1f69b75 7545 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7546 timeo = rpc_get_timeout(task->tk_client);
7547 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7548 now = jiffies;
7549 if (time_after(giveup, now)) {
7550 unsigned long delay;
7551
7552 /* Delay for:
7553 * - Not less then NFS4_POLL_RETRY_MIN.
7554 * - One last time a jiffie before we give up
7555 * - exponential backoff (time_now minus start_attempt)
7556 */
7557 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7558 min((giveup - now - 1),
7559 now - lgp->args.timestamp));
7560
7561 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7562 __func__, delay);
7563 rpc_delay(task, delay);
7564 task->tk_status = 0;
7565 rpc_restart_call_prepare(task);
7566 goto out; /* Do not call nfs4_async_handle_error() */
7567 }
ee314c2a
TM		 7568 break;
7569 case -NFS4ERR_EXPIRED:
7570 case -NFS4ERR_BAD_STATEID:
7571 spin_lock(&inode->i_lock);
7572 lo = NFS_I(inode)->layout;
7573 if (!lo || list_empty(&lo->plh_segs)) {
7574 spin_unlock(&inode->i_lock);
7575 /* If the open stateid was bad, then recover it. */
7576 state = lgp->args.ctx->state;
7577 } else {
7578 LIST_HEAD(head);
7579
defb8460
CH		 7580 /*
7581 * Mark the bad layout state as invalid, then retry
7582 * with the current stateid.
7583 */
ee314c2a
TM		 7584 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7585 spin_unlock(&inode->i_lock);
ee314c2a 7586 pnfs_free_lseg_list(&head);
defb8460
CH		 7587
7588 task->tk_status = 0;
7589 rpc_restart_call_prepare(task);
b1f69b75
AA		 7590 }
7591 }
ee314c2a
TM		 7592 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7593 rpc_restart_call_prepare(task);
7594out:
b1f69b75
AA		 7595 dprintk("<-- %s\n", __func__);
7596}
7597
8554116e
IK		 7598static size_t max_response_pages(struct nfs_server *server)
7599{
7600 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7601 return nfs_page_array_len(0, max_resp_sz);
7602}
7603
7604static void nfs4_free_pages(struct page **pages, size_t size)
7605{
7606 int i;
7607
7608 if (!pages)
7609 return;
7610
7611 for (i = 0; i < size; i++) {
7612 if (!pages[i])
7613 break;
7614 __free_page(pages[i]);
7615 }
7616 kfree(pages);
7617}
7618
7619static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7620{
7621 struct page **pages;
7622 int i;
7623
7624 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7625 if (!pages) {
7626 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7627 return NULL;
7628 }
7629
7630 for (i = 0; i < size; i++) {
7631 pages[i] = alloc_page(gfp_flags);
7632 if (!pages[i]) {
7633 dprintk("%s: failed to allocate page\n", __func__);
7634 nfs4_free_pages(pages, size);
7635 return NULL;
7636 }
7637 }
7638
7639 return pages;
7640}
7641
b1f69b75
AA		 7642static void nfs4_layoutget_release(void *calldata)
7643{
7644 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7645 struct inode *inode = lgp->args.inode;
7646 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7647 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7648
7649 dprintk("--> %s\n", __func__);
8554116e 7650 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7651 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7652 put_nfs_open_context(lgp->args.ctx);
7653 kfree(calldata);
7654 dprintk("<-- %s\n", __func__);
7655}
7656
7657static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7658 .rpc_call_prepare = nfs4_layoutget_prepare,
7659 .rpc_call_done = nfs4_layoutget_done,
7660 .rpc_release = nfs4_layoutget_release,
7661};
7662
a0b0a6e3
TM		 7663struct pnfs_layout_segment *
7664nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7665{
a47970ff
WAA		 7666 struct inode *inode = lgp->args.inode;
7667 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7668 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7669 struct rpc_task *task;
7670 struct rpc_message msg = {
7671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7672 .rpc_argp = &lgp->args,
7673 .rpc_resp = &lgp->res,
6ab59344 7674 .rpc_cred = lgp->cred,
b1f69b75
AA		 7675 };
7676 struct rpc_task_setup task_setup_data = {
7677 .rpc_client = server->client,
7678 .rpc_message = &msg,
7679 .callback_ops = &nfs4_layoutget_call_ops,
7680 .callback_data = lgp,
7681 .flags = RPC_TASK_ASYNC,
7682 };
a0b0a6e3 7683 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7684 int status = 0;
7685
7686 dprintk("--> %s\n", __func__);
7687
8554116e
IK		 7688 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7689 if (!lgp->args.layout.pages) {
7690 nfs4_layoutget_release(lgp);
a0b0a6e3 7691 return ERR_PTR(-ENOMEM);
8554116e
IK		 7692 }
7693 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7694 lgp->args.timestamp = jiffies;
8554116e 7695
35124a09 7696 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7697 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7698 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7699
7700 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7701 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7702
b1f69b75
AA		 7703 task = rpc_run_task(&task_setup_data);
7704 if (IS_ERR(task))
a0b0a6e3 7705 return ERR_CAST(task);
b1f69b75 7706 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7707 if (status == 0)
7708 status = task->tk_status;
1037e6ea
TM		 7709 trace_nfs4_layoutget(lgp->args.ctx,
7710 &lgp->args.range,
7711 &lgp->res.range,
7712 status);
085b7a45
WAA		 7713 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7714 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7715 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7716 rpc_put_task(task);
7717 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7718 if (status)
7719 return ERR_PTR(status);
7720 return lseg;
b1f69b75
AA		 7721}
7722
cbe82603
BH		 7723static void
7724nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7725{
7726 struct nfs4_layoutreturn *lrp = calldata;
7727
7728 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7729 nfs41_setup_sequence(lrp->clp->cl_session,
7730 &lrp->args.seq_args,
7731 &lrp->res.seq_res,
7732 task);
cbe82603
BH		 7733}
7734
7735static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7736{
7737 struct nfs4_layoutreturn *lrp = calldata;
7738 struct nfs_server *server;
7739
7740 dprintk("--> %s\n", __func__);
7741
6ba7db34 7742 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7743 return;
7744
7745 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7746 switch (task->tk_status) {
7747 default:
7748 task->tk_status = 0;
7749 case 0:
7750 break;
7751 case -NFS4ERR_DELAY:
7752 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7753 break;
d00c5d43 7754 rpc_restart_call_prepare(task);
cbe82603
BH		 7755 return;
7756 }
cbe82603
BH		 7757 dprintk("<-- %s\n", __func__);
7758}
7759
7760static void nfs4_layoutreturn_release(void *calldata)
7761{
7762 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7763 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7764
7765 dprintk("--> %s\n", __func__);
849b286f
TM		 7766 spin_lock(&lo->plh_inode->i_lock);
7767 if (lrp->res.lrs_present)
7768 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7769 lo->plh_block_lgets--;
7770 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7771 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7772 kfree(calldata);
7773 dprintk("<-- %s\n", __func__);
7774}
7775
7776static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7777 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7778 .rpc_call_done = nfs4_layoutreturn_done,
7779 .rpc_release = nfs4_layoutreturn_release,
7780};
7781
7782int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7783{
7784 struct rpc_task *task;
7785 struct rpc_message msg = {
7786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7787 .rpc_argp = &lrp->args,
7788 .rpc_resp = &lrp->res,
9556000d 7789 .rpc_cred = lrp->cred,
cbe82603
BH		 7790 };
7791 struct rpc_task_setup task_setup_data = {
1771c577 7792 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7793 .rpc_message = &msg,
7794 .callback_ops = &nfs4_layoutreturn_call_ops,
7795 .callback_data = lrp,
7796 };
7797 int status;
7798
7799 dprintk("--> %s\n", __func__);
a9c92d6b 7800 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7801 task = rpc_run_task(&task_setup_data);
7802 if (IS_ERR(task))
7803 return PTR_ERR(task);
7804 status = task->tk_status;
1037e6ea 7805 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7806 dprintk("<-- %s status=%d\n", __func__, status);
7807 rpc_put_task(task);
7808 return status;
7809}
7810
b1f69b75 7811static int
cd5875fe
TM		 7812_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7813 struct pnfs_device *pdev,
7814 struct rpc_cred *cred)
b1f69b75
AA		 7815{
7816 struct nfs4_getdeviceinfo_args args = {
7817 .pdev = pdev,
7818 };
7819 struct nfs4_getdeviceinfo_res res = {
7820 .pdev = pdev,
7821 };
7822 struct rpc_message msg = {
7823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7824 .rpc_argp = &args,
7825 .rpc_resp = &res,
cd5875fe 7826 .rpc_cred = cred,
b1f69b75
AA		 7827 };
7828 int status;
7829
7830 dprintk("--> %s\n", __func__);
7c513058 7831 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7832 dprintk("<-- %s status=%d\n", __func__, status);
7833
7834 return status;
7835}
7836
cd5875fe
TM		 7837int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7838 struct pnfs_device *pdev,
7839 struct rpc_cred *cred)
b1f69b75
AA		 7840{
7841 struct nfs4_exception exception = { };
7842 int err;
7843
7844 do {
7845 err = nfs4_handle_exception(server,
cd5875fe 7846 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7847 &exception);
7848 } while (exception.retry);
7849 return err;
7850}
7851EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7852
863a3c6c
AA		 7853static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7854{
7855 struct nfs4_layoutcommit_data *data = calldata;
7856 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7857 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7858
d9afbd1b
TM		 7859 nfs41_setup_sequence(session,
7860 &data->args.seq_args,
7861 &data->res.seq_res,
7862 task);
863a3c6c
AA		 7863}
7864
7865static void
7866nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7867{
7868 struct nfs4_layoutcommit_data *data = calldata;
7869 struct nfs_server *server = NFS_SERVER(data->args.inode);
7870
6ba7db34 7871 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7872 return;
7873
7874 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7875 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7876 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7877 case -NFS4ERR_BADLAYOUT: /* no layout */
7878 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7879 task->tk_status = 0;
e59d27e0 7880 case 0:
e59d27e0
TM		 7881 break;
7882 default:
7883 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7884 rpc_restart_call_prepare(task);
7885 return;
7886 }
7887 }
863a3c6c
AA		 7888}
7889
7890static void nfs4_layoutcommit_release(void *calldata)
7891{
7892 struct nfs4_layoutcommit_data *data = calldata;
7893
db29c089 7894 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7895 nfs_post_op_update_inode_force_wcc(data->args.inode,
7896 data->res.fattr);
863a3c6c
AA		 7897 put_rpccred(data->cred);
7898 kfree(data);
7899}
7900
7901static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7902 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7903 .rpc_call_done = nfs4_layoutcommit_done,
7904 .rpc_release = nfs4_layoutcommit_release,
7905};
7906
7907int
ef311537 7908nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7909{
7910 struct rpc_message msg = {
7911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7912 .rpc_argp = &data->args,
7913 .rpc_resp = &data->res,
7914 .rpc_cred = data->cred,
7915 };
7916 struct rpc_task_setup task_setup_data = {
7917 .task = &data->task,
7918 .rpc_client = NFS_CLIENT(data->args.inode),
7919 .rpc_message = &msg,
7920 .callback_ops = &nfs4_layoutcommit_ops,
7921 .callback_data = data,
7922 .flags = RPC_TASK_ASYNC,
7923 };
7924 struct rpc_task *task;
7925 int status = 0;
7926
7927 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7928 "lbw: %llu inode %lu\n",
7929 data->task.tk_pid, sync,
7930 data->args.lastbytewritten,
7931 data->args.inode->i_ino);
7932
a9c92d6b 7933 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7934 task = rpc_run_task(&task_setup_data);
7935 if (IS_ERR(task))
7936 return PTR_ERR(task);
ef311537 7937 if (sync == false)
863a3c6c
AA		 7938 goto out;
7939 status = nfs4_wait_for_completion_rpc_task(task);
7940 if (status != 0)
7941 goto out;
7942 status = task->tk_status;
1037e6ea 7943 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7944out:
7945 dprintk("%s: status %d\n", __func__, status);
7946 rpc_put_task(task);
7947 return status;
7948}
fca78d6d 7949
97431204
AA		 7950/**
7951 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7952 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7953 */
fca78d6d
BS		 7954static int
7955_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7956 struct nfs_fsinfo *info,
7957 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7958{
7959 struct nfs41_secinfo_no_name_args args = {
7960 .style = SECINFO_STYLE_CURRENT_FH,
7961 };
7962 struct nfs4_secinfo_res res = {
7963 .flavors = flavors,
7964 };
7965 struct rpc_message msg = {
7966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7967 .rpc_argp = &args,
7968 .rpc_resp = &res,
7969 };
b1b3e136 7970 struct rpc_clnt *clnt = server->client;
7cb852df 7971 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7972 int status;
7973
7974 if (use_integrity) {
7975 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7976 cred = nfs4_get_clid_cred(server->nfs_client);
7977 msg.rpc_cred = cred;
b1b3e136
WAA		 7978 }
7979
7980 dprintk("--> %s\n", __func__);
7981 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7982 &res.seq_res, 0);
7983 dprintk("<-- %s status=%d\n", __func__, status);
7984
7cb852df
WAA		 7985 if (cred)
7986 put_rpccred(cred);
b1b3e136
WAA		 7987
7988 return status;
fca78d6d
BS		 7989}
7990
7991static int
7992nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7993 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7994{
7995 struct nfs4_exception exception = { };
7996 int err;
7997 do {
b1b3e136
WAA		 7998 /* first try using integrity protection */
7999 err = -NFS4ERR_WRONGSEC;
8000
8001 /* try to use integrity protection with machine cred */
8002 if (_nfs4_is_integrity_protected(server->nfs_client))
8003 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8004 flavors, true);
8005
8006 /*
8007 * if unable to use integrity protection, or SECINFO with
8008 * integrity protection returns NFS4ERR_WRONGSEC (which is
8009 * disallowed by spec, but exists in deployed servers) use
8010 * the current filesystem's rpc_client and the user cred.
8011 */
8012 if (err == -NFS4ERR_WRONGSEC)
8013 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8014 flavors, false);
8015
fca78d6d
BS		 8016 switch (err) {
8017 case 0:
8018 case -NFS4ERR_WRONGSEC:
78b19bae 8019 case -ENOTSUPP:
05e9cfb4 8020 goto out;
fca78d6d
BS		 8021 default:
8022 err = nfs4_handle_exception(server, err, &exception);
8023 }
8024 } while (exception.retry);
05e9cfb4 8025out:
fca78d6d
BS		 8026 return err;
8027}
8028
8029static int
8030nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8031 struct nfs_fsinfo *info)
8032{
8033 int err;
8034 struct page *page;
367156d9 8035 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8036 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8037 struct nfs4_secinfo4 *secinfo;
8038 int i;
fca78d6d
BS		 8039
8040 page = alloc_page(GFP_KERNEL);
8041 if (!page) {
8042 err = -ENOMEM;
8043 goto out;
8044 }
8045
8046 flavors = page_address(page);
8047 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8048
8049 /*
8050 * Fall back on "guess and check" method if
8051 * the server doesn't support SECINFO_NO_NAME
8052 */
78b19bae 8053 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8054 err = nfs4_find_root_sec(server, fhandle, info);
8055 goto out_freepage;
8056 }
8057 if (err)
8058 goto out_freepage;
8059
58a8cf12
WAA		 8060 for (i = 0; i < flavors->num_flavors; i++) {
8061 secinfo = &flavors->flavors[i];
8062
8063 switch (secinfo->flavor) {
8064 case RPC_AUTH_NULL:
8065 case RPC_AUTH_UNIX:
8066 case RPC_AUTH_GSS:
8067 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8068 &secinfo->flavor_info);
8069 break;
8070 default:
8071 flavor = RPC_AUTH_MAXFLAVOR;
8072 break;
8073 }
8074
4d4b69dd
WAA		 8075 if (!nfs_auth_info_match(&server->auth_info, flavor))
8076 flavor = RPC_AUTH_MAXFLAVOR;
8077
58a8cf12
WAA		 8078 if (flavor != RPC_AUTH_MAXFLAVOR) {
8079 err = nfs4_lookup_root_sec(server, fhandle,
8080 info, flavor);
8081 if (!err)
8082 break;
8083 }
8084 }
8085
8086 if (flavor == RPC_AUTH_MAXFLAVOR)
8087 err = -EPERM;
fca78d6d
BS		 8088
8089out_freepage:
8090 put_page(page);
8091 if (err == -EACCES)
8092 return -EPERM;
8093out:
8094 return err;
8095}
1cab0652 8096
ab7cb0df
TM		 8097static int _nfs41_test_stateid(struct nfs_server *server,
8098 nfs4_stateid *stateid,
8099 struct rpc_cred *cred)
7d974794
BS		 8100{
8101 int status;
8102 struct nfs41_test_stateid_args args = {
1cab0652 8103 .stateid = stateid,
7d974794
BS		 8104 };
8105 struct nfs41_test_stateid_res res;
8106 struct rpc_message msg = {
8107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8108 .rpc_argp = &args,
8109 .rpc_resp = &res,
ab7cb0df 8110 .rpc_cred = cred,
7d974794 8111 };
3787d506
WAA		 8112 struct rpc_clnt *rpc_client = server->client;
8113
8114 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8115 &rpc_client, &msg);
1cab0652 8116
38527b15 8117 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8118 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8119 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8120 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8121 &args.seq_args, &res.seq_res);
38527b15
CL		 8122 if (status != NFS_OK) {
8123 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8124 return status;
38527b15
CL		 8125 }
8126 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8127 return -res.status;
7d974794
BS		 8128}
8129
38527b15
CL		 8130/**
8131 * nfs41_test_stateid - perform a TEST_STATEID operation
8132 *
8133 * @server: server / transport on which to perform the operation
8134 * @stateid: state ID to test
ab7cb0df 8135 * @cred: credential
38527b15
CL		 8136 *
8137 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8138 * Otherwise a negative NFS4ERR value is returned if the operation
8139 * failed or the state ID is not currently valid.
8140 */
ab7cb0df
TM		 8141static int nfs41_test_stateid(struct nfs_server *server,
8142 nfs4_stateid *stateid,
8143 struct rpc_cred *cred)
7d974794
BS		 8144{
8145 struct nfs4_exception exception = { };
8146 int err;
8147 do {
ab7cb0df 8148 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8149 if (err != -NFS4ERR_DELAY)
8150 break;
8151 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8152 } while (exception.retry);
8153 return err;
8154}
9aeda35f 8155
7c1d5fae
TM		 8156struct nfs_free_stateid_data {
8157 struct nfs_server *server;
8158 struct nfs41_free_stateid_args args;
9aeda35f 8159 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8160};
8161
8162static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8163{
8164 struct nfs_free_stateid_data *data = calldata;
8165 nfs41_setup_sequence(nfs4_get_session(data->server),
8166 &data->args.seq_args,
8167 &data->res.seq_res,
8168 task);
8169}
8170
8171static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8172{
8173 struct nfs_free_stateid_data *data = calldata;
8174
8175 nfs41_sequence_done(task, &data->res.seq_res);
8176
8177 switch (task->tk_status) {
8178 case -NFS4ERR_DELAY:
8179 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8180 rpc_restart_call_prepare(task);
8181 }
8182}
8183
8184static void nfs41_free_stateid_release(void *calldata)
8185{
8186 kfree(calldata);
8187}
8188
17f26b12 8189static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8190 .rpc_call_prepare = nfs41_free_stateid_prepare,
8191 .rpc_call_done = nfs41_free_stateid_done,
8192 .rpc_release = nfs41_free_stateid_release,
8193};
8194
8195static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8196 nfs4_stateid *stateid,
ab7cb0df 8197 struct rpc_cred *cred,
7c1d5fae
TM		 8198 bool privileged)
8199{
9aeda35f
BS		 8200 struct rpc_message msg = {
8201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8202 .rpc_cred = cred,
9aeda35f 8203 };
7c1d5fae
TM		 8204 struct rpc_task_setup task_setup = {
8205 .rpc_client = server->client,
8206 .rpc_message = &msg,
8207 .callback_ops = &nfs41_free_stateid_ops,
8208 .flags = RPC_TASK_ASYNC,
8209 };
8210 struct nfs_free_stateid_data *data;
9aeda35f 8211
3787d506
WAA		 8212 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8213 &task_setup.rpc_client, &msg);
8214
38527b15 8215 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8216 data = kmalloc(sizeof(*data), GFP_NOFS);
8217 if (!data)
8218 return ERR_PTR(-ENOMEM);
8219 data->server = server;
8220 nfs4_stateid_copy(&data->args.stateid, stateid);
8221
8222 task_setup.callback_data = data;
8223
8224 msg.rpc_argp = &data->args;
8225 msg.rpc_resp = &data->res;
a9c92d6b 8226 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8227 if (privileged)
8228 nfs4_set_sequence_privileged(&data->args.seq_args);
8229
8230 return rpc_run_task(&task_setup);
9aeda35f
BS		 8231}
8232
38527b15
CL		 8233/**
8234 * nfs41_free_stateid - perform a FREE_STATEID operation
8235 *
8236 * @server: server / transport on which to perform the operation
8237 * @stateid: state ID to release
ab7cb0df 8238 * @cred: credential
38527b15
CL		 8239 *
8240 * Returns NFS_OK if the server freed "stateid". Otherwise a
8241 * negative NFS4ERR value is returned.
8242 */
ab7cb0df
TM		 8243static int nfs41_free_stateid(struct nfs_server *server,
8244 nfs4_stateid *stateid,
8245 struct rpc_cred *cred)
9aeda35f 8246{
7c1d5fae
TM		 8247 struct rpc_task *task;
8248 int ret;
8249
ab7cb0df 8250 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8251 if (IS_ERR(task))
8252 return PTR_ERR(task);
8253 ret = rpc_wait_for_completion_task(task);
8254 if (!ret)
8255 ret = task->tk_status;
8256 rpc_put_task(task);
8257 return ret;
9aeda35f 8258}
36281caa 8259
f1cdae87
JL		 8260static void
8261nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8262{
8263 struct rpc_task *task;
ab7cb0df 8264 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8265
ab7cb0df 8266 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8267 nfs4_free_lock_state(server, lsp);
8268 if (IS_ERR(task))
f1cdae87 8269 return;
c8b2d0bf 8270 rpc_put_task(task);
c8b2d0bf
TM		 8271}
8272
36281caa
TM		 8273static bool nfs41_match_stateid(const nfs4_stateid *s1,
8274 const nfs4_stateid *s2)
8275{
2d2f24ad 8276 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8277 return false;
8278
2d2f24ad 8279 if (s1->seqid == s2->seqid)
36281caa 8280 return true;
2d2f24ad 8281 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8282 return true;
8283
8284 return false;
8285}
8286
557134a3
AA		 8287#endif /* CONFIG_NFS_V4_1 */
8288
36281caa
TM		 8289static bool nfs4_match_stateid(const nfs4_stateid *s1,
8290 const nfs4_stateid *s2)
8291{
f597c537 8292 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8293}
8294
8295
17280175 8296static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8297 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8298 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8299 .recover_open = nfs4_open_reclaim,
8300 .recover_lock = nfs4_lock_reclaim,
591d71cb 8301 .establish_clid = nfs4_init_clientid,
05f4c350 8302 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8303};
8304
591d71cb 8305#if defined(CONFIG_NFS_V4_1)
17280175 8306static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8307 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8308 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8309 .recover_open = nfs4_open_reclaim,
8310 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8311 .establish_clid = nfs41_init_clientid,
fce5c838 8312 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8313 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8314};
8315#endif /* CONFIG_NFS_V4_1 */
8316
17280175 8317static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8318 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8319 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8320 .recover_open = nfs4_open_expired,
8321 .recover_lock = nfs4_lock_expired,
8322 .establish_clid = nfs4_init_clientid,
8323};
8324
8325#if defined(CONFIG_NFS_V4_1)
17280175 8326static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8327 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8328 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8329 .recover_open = nfs41_open_expired,
8330 .recover_lock = nfs41_lock_expired,
4d643d1d 8331 .establish_clid = nfs41_init_clientid,
1da177e4 8332};
591d71cb 8333#endif /* CONFIG_NFS_V4_1 */
1da177e4 8334
17280175 8335static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8336 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8337 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8338 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8339};
8340
8341#if defined(CONFIG_NFS_V4_1)
17280175 8342static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8343 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8344 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8345 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8346};
8347#endif
8348
ec011fe8 8349static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8350 .get_locations = _nfs40_proc_get_locations,
44c99933 8351 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8352};
8353
8354#if defined(CONFIG_NFS_V4_1)
8355static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8356 .get_locations = _nfs41_proc_get_locations,
44c99933 8357 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8358};
8359#endif /* CONFIG_NFS_V4_1 */
8360
97dc1359
TM		 8361static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8362 .minor_version = 0,
39c6daae
TM		 8363 .init_caps = NFS_CAP_READDIRPLUS
8364 | NFS_CAP_ATOMIC_OPEN
8365 | NFS_CAP_CHANGE_ATTR
8366 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8367 .init_client = nfs40_init_client,
8368 .shutdown_client = nfs40_shutdown_client,
36281caa 8369 .match_stateid = nfs4_match_stateid,
fca78d6d 8370 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8371 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8372 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8373 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8374 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8375 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8376 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8377};
8378
8379#if defined(CONFIG_NFS_V4_1)
8380static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8381 .minor_version = 1,
39c6daae
TM		 8382 .init_caps = NFS_CAP_READDIRPLUS
8383 | NFS_CAP_ATOMIC_OPEN
8384 | NFS_CAP_CHANGE_ATTR
3b66486c 8385 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8386 | NFS_CAP_STATEID_NFSV41
8387 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8388 .init_client = nfs41_init_client,
8389 .shutdown_client = nfs41_shutdown_client,
36281caa 8390 .match_stateid = nfs41_match_stateid,
fca78d6d 8391 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8392 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8393 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8394 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8395 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8396 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8397 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8398};
8399#endif
8400
42c2c424
SD		 8401#if defined(CONFIG_NFS_V4_2)
8402static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8403 .minor_version = 2,
7017310a
BS		 8404 .init_caps = NFS_CAP_READDIRPLUS
8405 | NFS_CAP_ATOMIC_OPEN
8406 | NFS_CAP_CHANGE_ATTR
8407 | NFS_CAP_POSIX_LOCK
8408 | NFS_CAP_STATEID_NFSV41
8409 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8410 .init_client = nfs41_init_client,
8411 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8412 .match_stateid = nfs41_match_stateid,
8413 .find_root_sec = nfs41_find_root_sec,
7017310a 8414 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8415 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8416 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8417 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8418 .state_renewal_ops = &nfs41_state_renewal_ops,
8419};
8420#endif
8421
97dc1359
TM		 8422const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8423 [0] = &nfs_v4_0_minor_ops,
8424#if defined(CONFIG_NFS_V4_1)
8425 [1] = &nfs_v4_1_minor_ops,
8426#endif
42c2c424
SD		 8427#if defined(CONFIG_NFS_V4_2)
8428 [2] = &nfs_v4_2_minor_ops,
8429#endif
97dc1359
TM		 8430};
8431
17f26b12 8432static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8433 .create = nfs_create,
8434 .lookup = nfs_lookup,
8435 .atomic_open = nfs_atomic_open,
8436 .link = nfs_link,
8437 .unlink = nfs_unlink,
8438 .symlink = nfs_symlink,
8439 .mkdir = nfs_mkdir,
8440 .rmdir = nfs_rmdir,
8441 .mknod = nfs_mknod,
8442 .rename = nfs_rename,
8443 .permission = nfs_permission,
8444 .getattr = nfs_getattr,
8445 .setattr = nfs_setattr,
8446 .getxattr = generic_getxattr,
8447 .setxattr = generic_setxattr,
8448 .listxattr = generic_listxattr,
8449 .removexattr = generic_removexattr,
8450};
8451
92e1d5be 8452static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8453 .permission = nfs_permission,
8454 .getattr = nfs_getattr,
8455 .setattr = nfs_setattr,
64c2ce8b
AK		 8456 .getxattr = generic_getxattr,
8457 .setxattr = generic_setxattr,
8458 .listxattr = generic_listxattr,
8459 .removexattr = generic_removexattr,
6b3b5496
BF		 8460};
8461
509de811 8462const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8463 .version = 4, /* protocol version */
8464 .dentry_ops = &nfs4_dentry_operations,
8465 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8466 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8467 .file_ops = &nfs4_file_operations,
1da177e4 8468 .getroot = nfs4_proc_get_root,
281cad46 8469 .submount = nfs4_submount,
ff9099f2 8470 .try_mount = nfs4_try_mount,
1da177e4
LT		 8471 .getattr = nfs4_proc_getattr,
8472 .setattr = nfs4_proc_setattr,
8473 .lookup = nfs4_proc_lookup,
8474 .access = nfs4_proc_access,
8475 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8476 .create = nfs4_proc_create,
8477 .remove = nfs4_proc_remove,
8478 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8479 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8480 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8481 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8482 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8483 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8484 .link = nfs4_proc_link,
8485 .symlink = nfs4_proc_symlink,
8486 .mkdir = nfs4_proc_mkdir,
8487 .rmdir = nfs4_proc_remove,
8488 .readdir = nfs4_proc_readdir,
8489 .mknod = nfs4_proc_mknod,
8490 .statfs = nfs4_proc_statfs,
8491 .fsinfo = nfs4_proc_fsinfo,
8492 .pathconf = nfs4_proc_pathconf,
e9326dca 8493 .set_capabilities = nfs4_server_capabilities,
1da177e4 8494 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8495 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8496 .read_setup = nfs4_proc_read_setup,
ec06c096 8497 .read_done = nfs4_read_done,
1da177e4 8498 .write_setup = nfs4_proc_write_setup,
788e7a89 8499 .write_done = nfs4_write_done,
1da177e4 8500 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8501 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8502 .commit_done = nfs4_commit_done,
1da177e4 8503 .lock = nfs4_proc_lock,
e50a1c2e 8504 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8505 .close_context = nfs4_close_context,
2b484297 8506 .open_context = nfs4_atomic_open,
011e2a7f 8507 .have_delegation = nfs4_have_delegation,
57ec14c5 8508 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8509 .alloc_client = nfs4_alloc_client,
45a52a02 8510 .init_client = nfs4_init_client,
cdb7eced 8511 .free_client = nfs4_free_client,
1179acc6
BS		 8512 .create_server = nfs4_create_server,
8513 .clone_server = nfs_clone_server,
1da177e4
LT		 8514};
8515
64c2ce8b
AK		 8516static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8517 .prefix = XATTR_NAME_NFSV4_ACL,
8518 .list = nfs4_xattr_list_nfs4_acl,
8519 .get = nfs4_xattr_get_nfs4_acl,
8520 .set = nfs4_xattr_set_nfs4_acl,
8521};
8522
8523const struct xattr_handler *nfs4_xattr_handlers[] = {
8524 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8525#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8526 &nfs4_xattr_nfs4_label_handler,
8527#endif
64c2ce8b
AK		 8528 NULL
8529};
8530
1da177e4
LT		 8531/*
8532 * Local variables:
8533 * c-basic-offset: 8
8534 * End:
8535 */
Linux 6.x block layer and io_uring tree(s)