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rpc: xs_bind - do not bind when requesting a random ephemeral port
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
cab92c19 542 if (slot == NULL)
3bd2384a
CL		 543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
a13ce7c6 562 struct nfs4_slot *slot = res->sr_slot;
c10e4498 563 bool send_new_highest_used_slotid = false;
13615871 564
a13ce7c6 565 tbl = slot->table;
e3725ec0 566 session = tbl->session;
ea028ac9 567
35dc1d74 568 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
a13ce7c6 575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
a13ce7c6 579 nfs4_free_slot(tbl, slot);
c10e4498
TM		 580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
b75ad4cd 583out_unlock:
35dc1d74 584 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 585 res->sr_slot = NULL;
c10e4498
TM		 586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 588}
589
f9c96fcc 590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 591{
e3725ec0 592 struct nfs4_session *session;
a13ce7c6 593 struct nfs4_slot *slot = res->sr_slot;
14516c3a 594 struct nfs_client *clp;
ac20d163 595 bool interrupted = false;
85563073 596 int ret = 1;
b0df806c 597
a13ce7c6
TM		 598 if (slot == NULL)
599 goto out_noaction;
468f8613
BS		 600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
b0df806c
AA		 602 goto out;
603
e3725ec0 604 session = slot->table->session;
933602e3 605
ac20d163
TM		 606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
2f92ae34 611 trace_nfs4_sequence_done(session, res);
691daf3b 612 /* Check the SEQUENCE operation status */
14516c3a
TM		 613 switch (res->sr_status) {
614 case 0:
b0df806c 615 /* Update the slot's sequence and clientid lease timer */
933602e3 616 ++slot->seq_nr;
e3725ec0 617 clp = session->clp;
8e63b6a8 618 do_renew_lease(clp, res->sr_timestamp);
0629e370 619 /* Check sequence flags */
b4410c2f
TM		 620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
464ee9f9 622 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 623 break;
ac20d163
TM		 624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
14516c3a
TM		 633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
df2fabff 638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 639 __func__,
df2fabff 640 slot->slot_nr,
933602e3 641 slot->seq_nr);
14516c3a 642 goto out_retry;
85563073
TM		 643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
e8794440
TM		 648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 650 /*
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
e8794440
TM		 658 /*
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
8e63b6a8
TM		 662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
e8794440
TM		 667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
14516c3a
TM		 670 default:
671 /* Just update the slot sequence no. */
933602e3 672 ++slot->seq_nr;
b0df806c
AA		 673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 677 nfs41_sequence_free_slot(res);
a13ce7c6 678out_noaction:
85563073 679 return ret;
e8794440
TM		 680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
14516c3a 686out_retry:
d05dd4e9 687 if (!rpc_restart_call(task))
14516c3a
TM		 688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
b0df806c 691}
f9c96fcc 692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 693
14516c3a
TM		 694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455
TM		 702}
703
dc70d7b3 704int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
ce5039c1
AA		 707 struct rpc_task *task)
708{
fbcd4abc
AA		 709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 711
712 dprintk("--> %s\n", __func__);
ce5039c1 713 /* slot already allocated? */
dfb4f309 714 if (res->sr_slot != NULL)
d9afbd1b 715 goto out_success;
ce5039c1 716
fbcd4abc
AA		 717 tbl = &session->fc_slot_table;
718
69d206b5
TM		 719 task->tk_timeout = 0;
720
fbcd4abc 721 spin_lock(&tbl->slot_tbl_lock);
774d5f14 722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 723 !args->sa_privileged) {
0b1c8fc4 724 /* The state manager will wait until the slot table is empty */
0b1c8fc4 725 dprintk("%s session is draining\n", __func__);
7b939a3f 726 goto out_sleep;
689cf5c1
AB		 727 }
728
2dc03b7f 729 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
fbcd4abc 734 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 735 goto out_sleep;
fbcd4abc
AA		 736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
2b2fa717 739 args->sa_slot = slot;
fbcd4abc 740
e8d92382 741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 742 slot->slot_nr, slot->seq_nr);
fbcd4abc 743
dfb4f309 744 res->sr_slot = slot;
8e63b6a8 745 res->sr_timestamp = jiffies;
2a6e26cd 746 res->sr_status_flags = 0;
fbcd4abc
AA		 747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
2f92ae34 752 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 753out_success:
754 rpc_call_start(task);
ce5039c1 755 return 0;
7b939a3f 756out_sleep:
8fe72bac
TM		 757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
1e1093c7
TM		 759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
ce5039c1 765}
dc70d7b3 766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 767
5a580e0a
CL		 768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
ce5039c1 772{
035168ab 773 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 774 int ret = 0;
775
3bd2384a
CL		 776 if (!session)
777 return nfs40_setup_sequence(server, args, res, task);
035168ab 778
e8d92382 779 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 780 __func__, session->clp, session, res->sr_slot ?
e8d92382 781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 782
9d12b216 783 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 784
ce5039c1
AA		 785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
ce5039c1
AA		 789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
2a3eb2b9 791 struct nfs4_call_sync_data *data = calldata;
6ba7db34 792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 793
035168ab
TM		 794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
d9afbd1b 796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 797}
798
69ab40c4
AA		 799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
69ab40c4 802
14516c3a 803 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 804}
805
17280175 806static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 807 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 808 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 809};
810
3bd2384a
CL		 811#else /* !CONFIG_NFS_V4_1 */
812
9915ea7e
CL		 813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
3bd2384a 818 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 819}
820
821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
823{
3bd2384a 824 return nfs40_sequence_done(task, res);
9915ea7e 825}
3bd2384a
CL		 826
827#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 828
829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
7c513058
BS		 847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
ce5039c1
AA		 849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
8fe72bac 851 struct nfs4_sequence_res *res)
ce5039c1
AA		 852{
853 int ret;
854 struct rpc_task *task;
9915ea7e 855 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 856 struct nfs4_call_sync_data data = {
035168ab 857 .seq_server = server,
ce5039c1
AA		 858 .seq_args = args,
859 .seq_res = res,
ce5039c1
AA		 860 };
861 struct rpc_task_setup task_setup = {
7c513058 862 .rpc_client = clnt,
ce5039c1 863 .rpc_message = msg,
9915ea7e 864 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 865 .callback_data = &data
866 };
867
ce5039c1
AA		 868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
873 rpc_put_task(task);
874 }
875 return ret;
876}
877
fd0c0953 878static
7c513058
BS		 879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
e73b83f2
BS		 881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
a9c92d6b 886 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 888}
cccef3b9 889
38478b24 890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 891{
38478b24 892 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 893
38478b24 894 spin_lock(&dir->i_lock);
359d7d1c 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 896 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 897 nfs_force_lookup_revalidate(dir);
a9a4a87a 898 dir->i_version = cinfo->after;
de242c0b 899 nfs_fscache_invalidate(dir);
38478b24 900 spin_unlock(&dir->i_lock);
1da177e4
LT		 901}
902
e56e0b78 903struct nfs4_opendata {
c6d00e63 904 struct kref kref;
e56e0b78
TM		 905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
cdd4e68b
TM		 907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
6926afd1
TM		 909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
e56e0b78 911 struct nfs_fattr f_attr;
1775fd3e 912 struct nfs4_label *f_label;
e56e0b78 913 struct dentry *dir;
82a2c1b7 914 struct dentry *dentry;
e56e0b78 915 struct nfs4_state_owner *owner;
aac00a8d 916 struct nfs4_state *state;
e56e0b78 917 struct iattr attrs;
26e976a8 918 unsigned long timestamp;
3e309914 919 unsigned int rpc_done : 1;
5bc2afc2 920 unsigned int file_created : 1;
bdeca1b7 921 unsigned int is_recover : 1;
24ac23ab
TM		 922 int rpc_status;
923 int cancelled;
e56e0b78
TM		 924};
925
49f9a0fa
TM		 926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
2ced46c2
TM		 955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
957{
958 p->o_res.f_attr = &p->f_attr;
1775fd3e 959 p->o_res.f_label = p->f_label;
c1d51931
TM		 960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 962 p->o_res.server = p->o_arg.server;
5f657530 963 p->o_res.access_request = p->o_arg.access;
2ced46c2 964 nfs_fattr_init(&p->f_attr);
6926afd1 965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 966}
967
82a2c1b7 968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 970 const struct iattr *attrs,
1775fd3e 971 struct nfs4_label *label,
4a1c0893 972 enum open_claim_type4 claim,
8535b2be 973 gfp_t gfp_mask)
e56e0b78 974{
82a2c1b7 975 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
8535b2be 980 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 981 if (p == NULL)
982 goto err;
14c43f76
DQ		 983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
8535b2be 988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 989 if (p->o_arg.seqid == NULL)
14c43f76 990 goto err_free_label;
82a2c1b7
AV		 991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
e56e0b78
TM		 993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
dc0b027d
TM		 996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1005 }
7539bbab 1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1009 p->o_arg.name = &dentry->d_name;
e56e0b78 1010 p->o_arg.server = server;
aa9c2669 1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1013 p->o_arg.label = label;
49f9a0fa
TM		 1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
4a1c0893
TM		 1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
536e43d1 1027 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1028 __u32 verf[2];
d77d76ff 1029
e56e0b78
TM		 1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1037 }
cdd4e68b
TM		 1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1041 nfs4_init_opendata_res(p);
c6d00e63 1042 kref_init(&p->kref);
e56e0b78 1043 return p;
14c43f76
DQ		 1044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
e56e0b78
TM		 1048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
c6d00e63 1054static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1055{
c6d00e63
TM		 1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
82a2c1b7 1058 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1059
1060 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
c6d00e63 1063 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1064
1065 nfs4_label_free(p->f_label);
1066
c6d00e63 1067 dput(p->dir);
82a2c1b7
AV		 1068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
6926afd1 1070 nfs_fattr_free_names(&p->f_attr);
e911b815 1071 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1072 kfree(p);
1073}
1074
1075static void nfs4_opendata_put(struct nfs4_opendata *p)
1076{
1077 if (p != NULL)
1078 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1079}
1080
06f814a3
TM		 1081static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1082{
06f814a3
TM		 1083 int ret;
1084
06f814a3 1085 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1086 return ret;
1087}
1088
dc0b027d 1089static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1090{
1091 int ret = 0;
dc0b027d 1092
536e43d1 1093 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1094 goto out;
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1096 case FMODE_READ:
88069f77
TM		 1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
6ee41268
TM		 1099 break;
1100 case FMODE_WRITE:
88069f77
TM		 1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
6ee41268 1107 }
dc0b027d 1108out:
6ee41268
TM		 1109 return ret;
1110}
1111
dc0b027d 1112static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1113{
652f89f6
TM		 1114 if (delegation == NULL)
1115 return 0;
dc0b027d 1116 if ((delegation->type & fmode) != fmode)
aac00a8d 1117 return 0;
15c831bf 1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1119 return 0;
d25be546
TM		 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
b7391f44 1122 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1123 return 1;
1124}
1125
dc0b027d 1126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1127{
dc0b027d 1128 switch (fmode) {
e7616923
TM		 1129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
dc0b027d 1138 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1139}
1140
4f14c194
TM		 1141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
e999e80e
TM		 1156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
4f14c194
TM		 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1163 return true;
4f14c194 1164 }
e999e80e
TM		 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
226056c5
TM		 1170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1172{
226056c5
TM		 1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
003707c7 1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
4f14c194
TM		 1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1202}
1203
dc0b027d 1204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1205{
dc0b027d 1206 switch (fmode) {
003707c7
TM		 1207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
e999e80e
TM		 1216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1221}
1222
dc0b027d 1223static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1224{
8bda4e4c
TM		 1225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
003707c7 1230 if (deleg_stateid != NULL) {
f597c537 1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
dc0b027d 1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
dc0b027d 1238 update_open_stateflags(state, fmode);
ec073428 1239 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1240}
1241
dc0b027d 1242static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
dc0b027d 1248 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
17f26b12 1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1258 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
f597c537 1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1264 goto no_delegation_unlock;
1265
b7391f44 1266 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
dc0b027d 1275 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1276 ret = 1;
1277 }
4f14c194
TM		 1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1280
1281 return ret;
1282}
1283
1284
dc0b027d 1285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
57ec14c5 1296 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1297}
1298
6ee41268 1299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
f448badd 1304 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1305 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
aac00a8d 1309 for (;;) {
dc0b027d 1310 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1311 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
6ee41268 1314 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1315 goto out_return_state;
1316 }
1317 spin_unlock(&state->owner->so_lock);
1318 }
34310430
TM		 1319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1321 if (!can_open_delegated(delegation, fmode)) {
34310430 1322 rcu_read_unlock();
aac00a8d 1323 break;
34310430 1324 }
aac00a8d 1325 /* Save the delegation */
f597c537 1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1327 rcu_read_unlock();
fa332941 1328 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
aac00a8d 1334 ret = -EAGAIN;
34310430
TM		 1335
1336 /* Try to update the stateid using the delegation */
dc0b027d 1337 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1338 goto out_return_state;
aac00a8d 1339 }
aac00a8d
TM		 1340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
e23008ec
AA		 1347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
d2bfda2e
WAA		 1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
e23008ec
AA		 1392 }
1393
e23008ec
AA		 1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1400update:
e23008ec
AA		 1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
d49f042a 1403 atomic_inc(&state->count);
e23008ec
AA		 1404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1b370bc2 1416 int ret;
24ac23ab 1417
aac00a8d 1418 if (!data->rpc_done) {
6ee41268 1419 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1420 goto out;
1421 }
1422
1b370bc2 1423 ret = -EAGAIN;
24ac23ab 1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1425 goto err;
1775fd3e 1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1427 ret = PTR_ERR(inode);
03f28e3a 1428 if (IS_ERR(inode))
1b370bc2
TM		 1429 goto err;
1430 ret = -ENOMEM;
24ac23ab
TM		 1431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
1b370bc2 1433 goto err_put_inode;
e23008ec
AA		 1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
34310430 1436 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1437 data->o_arg.fmode);
24ac23ab 1438 iput(inode);
aac00a8d 1439out:
7aa262b5 1440 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1441 return state;
1b370bc2
TM		 1442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
24ac23ab
TM		 1446}
1447
e23008ec
AA		 1448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
864472e9
TM		 1456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
4a1c0893
TM		 1473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1475{
1476 struct nfs4_opendata *opendata;
1477
4a1c0893 1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1479 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
dc0b027d 1487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1488{
2ced46c2 1489 struct nfs4_state *newstate;
864472e9
TM		 1490 int ret;
1491
dc0b027d
TM		 1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
b257957e 1497 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1498 if (ret != 0)
1499 return ret;
2ced46c2 1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
643168c2 1503 nfs4_close_state(newstate, fmode);
2ced46c2 1504 *res = newstate;
864472e9
TM		 1505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
864472e9 1510 struct nfs4_state *newstate;
864472e9
TM		 1511 int ret;
1512
4f14c194
TM		 1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1517 /* memory barrier prior to reading state->n_* */
2ced46c2 1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1519 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1520 smp_rmb();
1521 if (state->n_rdwr != 0) {
2ced46c2 1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1523 if (ret != 0)
1524 return ret;
2ced46c2
TM		 1525 if (newstate != state)
1526 return -ESTALE;
864472e9
TM		 1527 }
1528 if (state->n_wronly != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_rdonly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9 1541 }
1ac7e2fd
TM		 1542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1548 write_seqlock(&state->seqlock);
1ac7e2fd 1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1551 write_sequnlock(&state->seqlock);
1ac7e2fd 1552 }
864472e9
TM		 1553 return 0;
1554}
1555
1da177e4
LT		 1556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
1da177e4 1559 */
539cd03a 1560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1561{
1ac7e2fd 1562 struct nfs_delegation *delegation;
864472e9 1563 struct nfs4_opendata *opendata;
dc0b027d 1564 fmode_t delegation_type = 0;
1da177e4
LT		 1565 int status;
1566
4a1c0893
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1ac7e2fd
TM		 1571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1574 delegation_type = delegation->type;
1ac7e2fd 1575 rcu_read_unlock();
864472e9
TM		 1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
c6d00e63 1578 nfs4_opendata_put(opendata);
1da177e4
LT		 1579 return status;
1580}
1581
539cd03a 1582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
539cd03a 1588 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1589 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
168667c4 1592 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1593 break;
1594 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1595 } while (exception.retry);
1596 return err;
1597}
1598
864472e9
TM		 1599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
91876b13 1606 return -EAGAIN;
539cd03a 1607 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
db4f2e63 1612static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1613{
be76b5b6
TM		 1614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
352297b9
CL		 1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
8ef2f8d4
CL		 1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
be76b5b6
TM		 1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
db4f2e63 1646 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1650 return 0;
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
db4f2e63
TM		 1656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
be76b5b6 1660 }
1da177e4
LT		 1661 return err;
1662}
1663
db4f2e63
TM		 1664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
be05c860
CL		 1680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
17ead6c8
TM		 1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
be05c860
CL		 1686}
1687
cdd4e68b
TM		 1688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
17ead6c8 1692 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1693
cdd4e68b 1694 data->rpc_status = task->tk_status;
26e976a8 1695 if (data->rpc_status == 0) {
f597c537 1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1698 renew_lease(data->o_res.server, data->timestamp);
3e309914 1699 data->rpc_done = 1;
26e976a8 1700 }
cdd4e68b
TM		 1701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
3e309914 1712 if (!data->rpc_done)
cdd4e68b 1713 goto out_free;
cdd4e68b 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
cdd4e68b
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
1da177e4
LT		 1748 int status;
1749
17ead6c8 1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
5138fde0 1754 data->timestamp = jiffies;
c970aa85 1755 task = rpc_run_task(&task_setup_data);
7a1218a2 1756 if (IS_ERR(task))
cdd4e68b 1757 return PTR_ERR(task);
cdd4e68b
TM		 1758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
e6b3c4db 1764 rpc_put_task(task);
1da177e4
LT		 1765 return status;
1766}
1767
24ac23ab 1768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1769{
24ac23ab
TM		 1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
549b19cc 1772 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1773
24ac23ab 1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1775 goto out_wait;
aac00a8d
TM		 1776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
dc0b027d 1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1784 goto out_no_action;
aac00a8d
TM		 1785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
aac00a8d
TM		 1791 rcu_read_unlock();
1792 }
95b72eb0 1793 /* Update client id. */
549b19cc 1794 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
26e976a8 1804 data->timestamp = jiffies;
035168ab 1805 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1806 &data->o_arg.seq_args,
2240a9e2
TM		 1807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
6ee41268 1820 return;
652f89f6
TM		 1821unlock_no_action:
1822 rcu_read_unlock();
6ee41268
TM		 1823out_no_action:
1824 task->tk_action = NULL;
c8da19b9 1825out_wait:
b75ad4cd 1826 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1827}
1828
24ac23ab
TM		 1829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
1da177e4 1832
24ac23ab 1833 data->rpc_status = task->tk_status;
d898528c 1834
14516c3a
TM		 1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
d898528c 1837
24ac23ab 1838 if (task->tk_status == 0) {
807d66d8
TM		 1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
24ac23ab 1844 data->rpc_status = -ELOOP;
6f926b5b
TM		 1845 break;
1846 case S_IFDIR:
24ac23ab 1847 data->rpc_status = -EISDIR;
6f926b5b
TM		 1848 break;
1849 default:
24ac23ab 1850 data->rpc_status = -ENOTDIR;
807d66d8 1851 }
6f926b5b 1852 }
26e976a8 1853 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1856 }
3e309914 1857 data->rpc_done = 1;
24ac23ab 1858}
6f926b5b 1859
24ac23ab
TM		 1860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
3e309914 1869 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
24ac23ab 1874 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1875 if (!IS_ERR(state))
643168c2 1876 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1877out_free:
c6d00e63 1878 nfs4_opendata_put(data);
24ac23ab
TM		 1879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
b257957e 1887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
5138fde0
TM		 1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
c970aa85
TM		 1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
5138fde0 1902 .rpc_message = &msg,
c970aa85
TM		 1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
101070ca 1905 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1906 .flags = RPC_TASK_ASYNC,
1907 };
24ac23ab
TM		 1908 int status;
1909
a9c92d6b 1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1911 kref_get(&data->kref);
3e309914
TM		 1912 data->rpc_done = 0;
1913 data->rpc_status = 0;
2ced46c2 1914 data->cancelled = 0;
bdeca1b7
TM		 1915 data->is_recover = 0;
1916 if (isrecover) {
8fe72bac 1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1918 data->is_recover = 1;
1919 }
c970aa85 1920 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
6926afd1
TM		 1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
b257957e
AB		 1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
f3792d63
TM		 1955/*
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1959 * the same.
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1962 */
6168f62c
WAA		 1963static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1965 struct nfs4_state *state, fmode_t fmode,
1966 int openflags)
6168f62c
WAA		 1967{
1968 struct nfs_access_entry cache;
1969 u32 mask;
1970
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1974 return 0;
1975
1976 mask = 0;
f3792d63
TM		 1977 /*
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1980 */
f8d9a897
WAA		 1981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1983 mask = MAY_EXEC;
f3792d63 1984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1985 mask = MAY_READ;
6168f62c
WAA		 1986
1987 cache.cred = cred;
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1991
bbd3a8ee 1992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1993 return 0;
1994
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
998f40b5 1997 return -EACCES;
6168f62c
WAA		 1998}
1999
b257957e
AB		 2000/*
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2002 */
2003static int _nfs4_proc_open(struct nfs4_opendata *data)
2004{
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2012 if (!data->rpc_done)
2013 return status;
2014 if (status != 0) {
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2017 return -ENOENT;
24ac23ab 2018 return status;
08ef7bd3 2019 }
24ac23ab 2020
6926afd1
TM		 2021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2022
5bc2afc2 2023 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2024 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2029 }
0df5dd4a
TM		 2030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2033 status = _nfs4_proc_open_confirm(data);
1da177e4 2034 if (status != 0)
24ac23ab 2035 return status;
1da177e4
LT		 2036 }
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2039 return 0;
1da177e4
LT		 2040}
2041
d83217c1
AA		 2042static int nfs4_recover_expired_lease(struct nfs_server *server)
2043{
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2045}
2046
1da177e4
LT		 2047/*
2048 * OPEN_EXPIRED:
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2051 */
539cd03a 2052static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2053{
e56e0b78 2054 struct nfs4_opendata *opendata;
864472e9 2055 int ret;
1da177e4 2056
4a1c0893 2057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2058 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
864472e9 2061 ret = nfs4_open_recover(opendata, state);
35d05778 2062 if (ret == -ESTALE)
3d4ff43d 2063 d_drop(ctx->dentry);
c6d00e63 2064 nfs4_opendata_put(opendata);
864472e9 2065 return ret;
1da177e4
LT		 2066}
2067
a9ed2e25 2068static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2069{
539cd03a 2070 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2071 struct nfs4_exception exception = { };
2072 int err;
2073
2074 do {
539cd03a 2075 err = _nfs4_open_expired(ctx, state);
42113a75 2076 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2078 continue;
a9ed2e25
TM		 2079 switch (err) {
2080 default:
2081 goto out;
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2085 err = 0;
2086 }
202b50dc 2087 } while (exception.retry);
a9ed2e25 2088out:
202b50dc
TM		 2089 return err;
2090}
2091
1da177e4
LT		 2092static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
1da177e4 2094 struct nfs_open_context *ctx;
864472e9 2095 int ret;
1da177e4 2096
864472e9
TM		 2097 ctx = nfs4_state_find_open_context(state);
2098 if (IS_ERR(ctx))
91876b13 2099 return -EAGAIN;
539cd03a 2100 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2101 put_nfs_open_context(ctx);
2102 return ret;
1da177e4
LT		 2103}
2104
f062eb6c 2105#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2106static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2107{
f062eb6c 2108 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2109 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2110 struct nfs_delegation *delegation;
2111 struct rpc_cred *cred = NULL;
2112 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2113
2114 /* If a state reset has been done, test_stateid is unneeded */
2115 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2116 return;
2117
ab7cb0df
TM		 2118 /* Get the delegation credential for use by test/free_stateid */
2119 rcu_read_lock();
2120 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2121 if (delegation != NULL &&
2122 nfs4_stateid_match(&delegation->stateid, stateid)) {
2123 cred = get_rpccred(delegation->cred);
2124 rcu_read_unlock();
2125 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2126 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2127 } else
2128 rcu_read_unlock();
2129
3e60ffdd
CL		 2130 if (status != NFS_OK) {
2131 /* Free the stateid unless the server explicitly
2132 * informs us the stateid is unrecognized. */
2133 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2134 nfs41_free_stateid(server, stateid, cred);
6938867e 2135 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2136
6938867e
BS		 2137 write_seqlock(&state->seqlock);
2138 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2139 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2140 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2141 }
ab7cb0df
TM		 2142
2143 if (cred != NULL)
2144 put_rpccred(cred);
3e60ffdd
CL		 2145}
2146
2147/**
2148 * nfs41_check_open_stateid - possibly free an open stateid
2149 *
2150 * @state: NFSv4 state for an inode
2151 *
2152 * Returns NFS_OK if recovery for this stateid is now finished.
2153 * Otherwise a negative NFS4ERR value is returned.
2154 */
2155static int nfs41_check_open_stateid(struct nfs4_state *state)
2156{
2157 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2158 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2159 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2160 int status;
2161
2162 /* If a state reset has been done, test_stateid is unneeded */
2163 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2164 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2165 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2166 return -NFS4ERR_BAD_STATEID;
2167
ab7cb0df 2168 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2169 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2170 if (status != NFS_OK) {
2171 /* Free the stateid unless the server explicitly
2172 * informs us the stateid is unrecognized. */
2173 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2174 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2175
2176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2178 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2179 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2180 }
2181 return status;
2182}
2183
2184static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2185{
eb64cf96 2186 int status;
b01dd1d8 2187
3e60ffdd
CL		 2188 nfs41_clear_delegation_stateid(state);
2189 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2190 if (status != NFS_OK)
2191 status = nfs4_open_expired(sp, state);
2192 return status;
f062eb6c
BS		 2193}
2194#endif
2195
aa53ed54
JL		 2196/*
2197 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2198 * fields corresponding to attributes that were used to store the verifier.
2199 * Make sure we clobber those fields in the later setattr call
2200 */
2201static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2202{
2203 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2204 !(sattr->ia_valid & ATTR_ATIME_SET))
2205 sattr->ia_valid |= ATTR_ATIME;
2206
2207 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2208 !(sattr->ia_valid & ATTR_MTIME_SET))
2209 sattr->ia_valid |= ATTR_MTIME;
2210}
2211
c21443c2
TM		 2212static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2213 fmode_t fmode,
2214 int flags,
3efb9722 2215 struct nfs_open_context *ctx)
c21443c2
TM		 2216{
2217 struct nfs4_state_owner *sp = opendata->owner;
2218 struct nfs_server *server = sp->so_server;
275bb307 2219 struct dentry *dentry;
c21443c2
TM		 2220 struct nfs4_state *state;
2221 unsigned int seq;
2222 int ret;
2223
2224 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2225
2226 ret = _nfs4_proc_open(opendata);
4fa2c54b
N		 2227 if (ret != 0) {
2228 if (ret == -ENOENT) {
2229 d_drop(opendata->dentry);
2230 d_add(opendata->dentry, NULL);
2231 nfs_set_verifier(opendata->dentry,
2232 nfs_save_change_attribute(opendata->dir->d_inode));
2233 }
c21443c2 2234 goto out;
4fa2c54b 2235 }
c21443c2
TM		 2236
2237 state = nfs4_opendata_to_nfs4_state(opendata);
2238 ret = PTR_ERR(state);
2239 if (IS_ERR(state))
2240 goto out;
2241 if (server->caps & NFS_CAP_POSIX_LOCK)
2242 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2243
275bb307
TM		 2244 dentry = opendata->dentry;
2245 if (dentry->d_inode == NULL) {
2246 /* FIXME: Is this d_drop() ever needed? */
2247 d_drop(dentry);
2248 dentry = d_add_unique(dentry, igrab(state->inode));
2249 if (dentry == NULL) {
2250 dentry = opendata->dentry;
2251 } else if (dentry != ctx->dentry) {
2252 dput(ctx->dentry);
2253 ctx->dentry = dget(dentry);
2254 }
2255 nfs_set_verifier(dentry,
2256 nfs_save_change_attribute(opendata->dir->d_inode));
2257 }
2258
c21443c2
TM		 2259 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2260 if (ret != 0)
2261 goto out;
2262
3efb9722 2263 ctx->state = state;
c45ffdd2
TM		 2264 if (dentry->d_inode == state->inode) {
2265 nfs_inode_attach_open_context(ctx);
2266 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2267 nfs4_schedule_stateid_recovery(server, state);
2268 }
c21443c2
TM		 2269out:
2270 return ret;
2271}
2272
1da177e4 2273/*
24ac23ab 2274 * Returns a referenced nfs4_state
1da177e4 2275 */
82be417a 2276static int _nfs4_do_open(struct inode *dir,
4197a055 2277 struct nfs_open_context *ctx,
82be417a
AA		 2278 int flags,
2279 struct iattr *sattr,
5bc2afc2
TM		 2280 struct nfs4_label *label,
2281 int *opened)
1da177e4
LT		 2282{
2283 struct nfs4_state_owner *sp;
2284 struct nfs4_state *state = NULL;
2285 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2286 struct nfs4_opendata *opendata;
4197a055
TM		 2287 struct dentry *dentry = ctx->dentry;
2288 struct rpc_cred *cred = ctx->cred;
2289 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2290 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2291 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2292 struct nfs4_label *olabel = NULL;
aac00a8d 2293 int status;
1da177e4
LT		 2294
2295 /* Protect against reboot recovery conflicts */
1da177e4 2296 status = -ENOMEM;
d1e284d5
TM		 2297 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2298 if (sp == NULL) {
1da177e4
LT		 2299 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2300 goto out_err;
2301 }
58d9714a
TM		 2302 status = nfs4_recover_expired_lease(server);
2303 if (status != 0)
b4454fe1 2304 goto err_put_state_owner;
82a2c1b7
AV		 2305 if (dentry->d_inode != NULL)
2306 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2307 status = -ENOMEM;
49f9a0fa
TM		 2308 if (dentry->d_inode)
2309 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2310 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2311 label, claim, GFP_KERNEL);
e56e0b78 2312 if (opendata == NULL)
95d35cb4 2313 goto err_put_state_owner;
1da177e4 2314
14c43f76
DQ		 2315 if (label) {
2316 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2317 if (IS_ERR(olabel)) {
2318 status = PTR_ERR(olabel);
2319 goto err_opendata_put;
2320 }
2321 }
2322
e911b815
TM		 2323 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2324 if (!opendata->f_attr.mdsthreshold) {
2325 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2326 if (!opendata->f_attr.mdsthreshold)
2327 goto err_free_label;
2328 }
1549210f 2329 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2330 }
82a2c1b7
AV		 2331 if (dentry->d_inode != NULL)
2332 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2333
3efb9722 2334 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2335 if (status != 0)
14c43f76 2336 goto err_free_label;
3efb9722 2337 state = ctx->state;
6168f62c 2338
549b19cc
TM		 2339 if ((opendata->o_arg.open_flags & O_EXCL) &&
2340 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2341 nfs4_exclusive_attrset(opendata, sattr);
2342
2343 nfs_fattr_init(opendata->o_res.f_attr);
2344 status = nfs4_do_setattr(state->inode, cred,
2345 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2346 state, label, olabel);
2347 if (status == 0) {
0ab64e0e 2348 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2349 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2350 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2351 }
0ab64e0e 2352 }
5bc2afc2
TM		 2353 if (opendata->file_created)
2354 *opened |= FILE_CREATED;
82be417a 2355
e911b815 2356 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2357 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2358 opendata->f_attr.mdsthreshold = NULL;
2359 }
82be417a 2360
14c43f76
DQ		 2361 nfs4_label_free(olabel);
2362
c6d00e63 2363 nfs4_opendata_put(opendata);
1da177e4 2364 nfs4_put_state_owner(sp);
1da177e4 2365 return 0;
14c43f76
DQ		 2366err_free_label:
2367 nfs4_label_free(olabel);
c6d00e63
TM		 2368err_opendata_put:
2369 nfs4_opendata_put(opendata);
e56e0b78
TM		 2370err_put_state_owner:
2371 nfs4_put_state_owner(sp);
1da177e4 2372out_err:
1da177e4
LT		 2373 return status;
2374}
2375
2376
82be417a 2377static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2378 struct nfs_open_context *ctx,
82be417a
AA		 2379 int flags,
2380 struct iattr *sattr,
5bc2afc2
TM		 2381 struct nfs4_label *label,
2382 int *opened)
1da177e4 2383{
49f9a0fa 2384 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2385 struct nfs4_exception exception = { };
2386 struct nfs4_state *res;
2387 int status;
2388
2389 do {
5bc2afc2 2390 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2391 res = ctx->state;
42113a75 2392 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2393 if (status == 0)
2394 break;
2395 /* NOTE: BAD_SEQID means the server and client disagree about the
2396 * book-keeping w.r.t. state-changing operations
2397 * (OPEN/CLOSE/LOCK/LOCKU...)
2398 * It is actually a sign of a bug on the client or on the server.
2399 *
2400 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2401 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2402 * have unhashed the old state_owner for us, and that we can
2403 * therefore safely retry using a new one. We should still warn
2404 * the user though...
2405 */
2406 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2407 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2408 " returned a bad sequence-id error!\n",
2409 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2410 exception.retry = 1;
2411 continue;
2412 }
550f5747
TM		 2413 /*
2414 * BAD_STATEID on OPEN means that the server cancelled our
2415 * state before it received the OPEN_CONFIRM.
2416 * Recover by retrying the request as per the discussion
2417 * on Page 181 of RFC3530.
2418 */
2419 if (status == -NFS4ERR_BAD_STATEID) {
2420 exception.retry = 1;
2421 continue;
2422 }
aac00a8d
TM		 2423 if (status == -EAGAIN) {
2424 /* We must have found a delegation */
2425 exception.retry = 1;
2426 continue;
2427 }
49f9a0fa
TM		 2428 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2429 continue;
2430 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2431 status, &exception));
2432 } while (exception.retry);
2433 return res;
2434}
2435
659bfcd6
TM		 2436static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2437 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2438 struct nfs4_state *state, struct nfs4_label *ilabel,
2439 struct nfs4_label *olabel)
1da177e4 2440{
3e4f6290 2441 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2442 struct nfs_setattrargs arg = {
3e4f6290 2443 .fh = NFS_FH(inode),
1da177e4
LT		 2444 .iap = sattr,
2445 .server = server,
2446 .bitmask = server->attr_bitmask,
1775fd3e 2447 .label = ilabel,
1da177e4
LT		 2448 };
2449 struct nfs_setattrres res = {
2450 .fattr = fattr,
1775fd3e 2451 .label = olabel,
1da177e4
LT		 2452 .server = server,
2453 };
2454 struct rpc_message msg = {
659bfcd6
TM		 2455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2456 .rpc_argp = &arg,
2457 .rpc_resp = &res,
2458 .rpc_cred = cred,
1da177e4 2459 };
26e976a8 2460 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2461 fmode_t fmode;
2462 bool truncate;
65e4308d 2463 int status;
1da177e4 2464
aa9c2669
DQ		 2465 arg.bitmask = nfs4_bitmask(server, ilabel);
2466 if (ilabel)
2467 arg.bitmask = nfs4_bitmask(server, olabel);
2468
0e574af1 2469 nfs_fattr_init(fattr);
1da177e4 2470
ee3ae84e
TM		 2471 /* Servers should only apply open mode checks for file size changes */
2472 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2473 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2474
2475 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2476 /* Use that stateid */
0418dae1 2477 } else if (truncate && state != NULL) {
2a369153
TM		 2478 struct nfs_lockowner lockowner = {
2479 .l_owner = current->files,
2480 .l_pid = current->tgid,
2481 };
0418dae1
TM		 2482 if (!nfs4_valid_open_stateid(state))
2483 return -EBADF;
2484 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2485 &lockowner) == -EIO)
2486 return -EBADF;
08e9eac4 2487 } else
f597c537 2488 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2489
7c513058 2490 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2491 if (status == 0 && state != NULL)
2492 renew_lease(server, timestamp);
65e4308d 2493 return status;
1da177e4
LT		 2494}
2495
659bfcd6
TM		 2496static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2497 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2498 struct nfs4_state *state, struct nfs4_label *ilabel,
2499 struct nfs4_label *olabel)
1da177e4 2500{
3e4f6290 2501 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2502 struct nfs4_exception exception = {
2503 .state = state,
3114ea7a 2504 .inode = inode,
a1d0b5ee 2505 };
1da177e4
LT		 2506 int err;
2507 do {
1775fd3e 2508 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2509 trace_nfs4_setattr(inode, err);
451146be
TM		 2510 switch (err) {
2511 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2512 if (!(sattr->ia_valid & ATTR_SIZE)) {
2513 pr_warn_once("NFSv4: server %s is incorrectly "
2514 "applying open mode checks to "
2515 "a SETATTR that is not "
2516 "changing file size.\n",
2517 server->nfs_client->cl_hostname);
2518 }
451146be
TM		 2519 if (state && !(state->state & FMODE_WRITE)) {
2520 err = -EBADF;
2521 if (sattr->ia_valid & ATTR_OPEN)
2522 err = -EACCES;
2523 goto out;
2524 }
2525 }
2526 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2527 } while (exception.retry);
451146be 2528out:
1da177e4
LT		 2529 return err;
2530}
2531
2532struct nfs4_closedata {
2533 struct inode *inode;
2534 struct nfs4_state *state;
2535 struct nfs_closeargs arg;
2536 struct nfs_closeres res;
516a6af6 2537 struct nfs_fattr fattr;
26e976a8 2538 unsigned long timestamp;
f7e8917a
FI		 2539 bool roc;
2540 u32 roc_barrier;
1da177e4
LT		 2541};
2542
963d8fe5 2543static void nfs4_free_closedata(void *data)
9512135d 2544{
963d8fe5
TM		 2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2547 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2548
f7e8917a
FI		 2549 if (calldata->roc)
2550 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2551 nfs4_put_open_state(calldata->state);
2552 nfs_free_seqid(calldata->arg.seqid);
9512135d 2553 nfs4_put_state_owner(sp);
322b2b90 2554 nfs_sb_deactive(sb);
9512135d
TM		 2555 kfree(calldata);
2556}
2557
963d8fe5 2558static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2559{
963d8fe5 2560 struct nfs4_closedata *calldata = data;
1da177e4 2561 struct nfs4_state *state = calldata->state;
1da177e4 2562 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2563 nfs4_stateid *res_stateid = NULL;
1da177e4 2564
a3ca5651 2565 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2566 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2567 return;
42113a75 2568 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2569 /* hmm. we are done with the inode, and in the process of freeing
2570 * the state_owner. we keep this around to process errors
2571 */
1da177e4
LT		 2572 switch (task->tk_status) {
2573 case 0:
412f6c4c
TM		 2574 res_stateid = &calldata->res.stateid;
2575 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2576 pnfs_roc_set_barrier(state->inode,
2577 calldata->roc_barrier);
26e976a8 2578 renew_lease(server, calldata->timestamp);
412f6c4c 2579 break;
69794ad7 2580 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2581 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2582 case -NFS4ERR_OLD_STATEID:
2583 case -NFS4ERR_BAD_STATEID:
1da177e4 2584 case -NFS4ERR_EXPIRED:
dc0b027d 2585 if (calldata->arg.fmode == 0)
9e33bed5 2586 break;
1da177e4 2587 default:
69794ad7 2588 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2589 rpc_restart_call_prepare(task);
69794ad7
TM		 2590 goto out_release;
2591 }
1da177e4 2592 }
412f6c4c 2593 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2594out_release:
72211dbe 2595 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2596 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2597 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2598}
2599
4ce70ada 2600static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2601{
4ce70ada 2602 struct nfs4_closedata *calldata = data;
9512135d 2603 struct nfs4_state *state = calldata->state;
7fdab069 2604 struct inode *inode = calldata->inode;
aee7af35 2605 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2606 int call_close = 0;
9512135d 2607
a3ca5651 2608 dprintk("%s: begin!\n", __func__);
963d8fe5 2609 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2610 goto out_wait;
003707c7 2611
88069f77 2612 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2613 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2614 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2615 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2616 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2617 /* Calculate the current open share mode */
2618 calldata->arg.fmode = 0;
2619 if (is_rdonly || is_rdwr)
2620 calldata->arg.fmode |= FMODE_READ;
2621 if (is_wronly || is_rdwr)
2622 calldata->arg.fmode |= FMODE_WRITE;
003707c7 2623 /* Calculate the change in open mode */
e7616923 2624 if (state->n_rdwr == 0) {
003707c7 2625 if (state->n_rdonly == 0) {
aee7af35 2626 call_close |= is_rdonly || is_rdwr;
88069f77 2627 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2628 }
2629 if (state->n_wronly == 0) {
aee7af35 2630 call_close |= is_wronly || is_rdwr;
88069f77 2631 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2632 }
e7616923 2633 }
5d422301
TM		 2634 if (!nfs4_valid_open_stateid(state))
2635 call_close = 0;
4cecb76f 2636 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2637
2638 if (!call_close) {
963d8fe5 2639 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2640 goto out_no_action;
9512135d 2641 }
88069f77 2642
f7e8917a 2643 if (calldata->arg.fmode == 0) {
88069f77 2644 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2645 if (calldata->roc &&
b9536ad5
AA		 2646 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2647 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2648 goto out_wait;
b9536ad5 2649 }
f7e8917a 2650 }
88069f77 2651
516a6af6 2652 nfs_fattr_init(calldata->res.fattr);
26e976a8 2653 calldata->timestamp = jiffies;
7fdab069 2654 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2655 &calldata->arg.seq_args,
2656 &calldata->res.seq_res,
2240a9e2
TM		 2657 task) != 0)
2658 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2659 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2660 return;
2661out_no_action:
2662 task->tk_action = NULL;
2663out_wait:
2664 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2665}
2666
963d8fe5 2667static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2668 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2669 .rpc_call_done = nfs4_close_done,
2670 .rpc_release = nfs4_free_closedata,
2671};
2672
fe08c546
PT		 2673static bool nfs4_state_has_opener(struct nfs4_state *state)
2674{
2675 /* first check existing openers */
2676 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2677 state->n_rdonly != 0)
2678 return true;
2679
2680 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2681 state->n_wronly != 0)
2682 return true;
2683
2684 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2685 state->n_rdwr != 0)
2686 return true;
2687
2688 return false;
2689}
2690
2691static bool nfs4_roc(struct inode *inode)
2692{
2693 struct nfs_inode *nfsi = NFS_I(inode);
2694 struct nfs_open_context *ctx;
2695 struct nfs4_state *state;
2696
2697 spin_lock(&inode->i_lock);
2698 list_for_each_entry(ctx, &nfsi->open_files, list) {
2699 state = ctx->state;
2700 if (state == NULL)
2701 continue;
2702 if (nfs4_state_has_opener(state)) {
2703 spin_unlock(&inode->i_lock);
2704 return false;
2705 }
2706 }
2707 spin_unlock(&inode->i_lock);
2708
2709 if (nfs4_check_delegation(inode, FMODE_READ))
2710 return false;
2711
2712 return pnfs_roc(inode);
2713}
2714
1da177e4
LT		 2715/*
2716 * It is possible for data to be read/written from a mem-mapped file
2717 * after the sys_close call (which hits the vfs layer as a flush).
2718 * This means that we can't safely call nfsv4 close on a file until
2719 * the inode is cleared. This in turn means that we are not good
2720 * NFSv4 citizens - we do not indicate to the server to update the file's
2721 * share state even when we are done with one of the three share
2722 * stateid's in the inode.
2723 *
2724 * NOTE: Caller must be holding the sp->so_owner semaphore!
2725 */
1f7977c1 2726int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2727{
4a35bd41 2728 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2729 struct nfs4_closedata *calldata;
b39e625b
TM		 2730 struct nfs4_state_owner *sp = state->owner;
2731 struct rpc_task *task;
5138fde0
TM		 2732 struct rpc_message msg = {
2733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2734 .rpc_cred = state->owner->so_cred,
2735 };
c970aa85
TM		 2736 struct rpc_task_setup task_setup_data = {
2737 .rpc_client = server->client,
5138fde0 2738 .rpc_message = &msg,
c970aa85 2739 .callback_ops = &nfs4_close_ops,
101070ca 2740 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2741 .flags = RPC_TASK_ASYNC,
2742 };
9512135d 2743 int status = -ENOMEM;
1da177e4 2744
fa940720
WAA		 2745 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2746 &task_setup_data.rpc_client, &msg);
2747
8535b2be 2748 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2749 if (calldata == NULL)
9512135d 2750 goto out;
a9c92d6b 2751 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2752 calldata->inode = state->inode;
1da177e4 2753 calldata->state = state;
4a35bd41 2754 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2755 calldata->arg.stateid = &state->open_stateid;
1da177e4 2756 /* Serialization for the sequence id */
8535b2be 2757 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2758 if (calldata->arg.seqid == NULL)
2759 goto out_free_calldata;
dc0b027d 2760 calldata->arg.fmode = 0;
a65318bf 2761 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2762 calldata->res.fattr = &calldata->fattr;
c1d51931 2763 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2764 calldata->res.server = server;
fe08c546 2765 calldata->roc = nfs4_roc(state->inode);
643168c2 2766 nfs_sb_active(calldata->inode->i_sb);
9512135d 2767
1174dd1f
TM		 2768 msg.rpc_argp = &calldata->arg;
2769 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2770 task_setup_data.callback_data = calldata;
2771 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2772 if (IS_ERR(task))
2773 return PTR_ERR(task);
a49c3c77
TM		 2774 status = 0;
2775 if (wait)
2776 status = rpc_wait_for_completion_task(task);
b39e625b 2777 rpc_put_task(task);
a49c3c77 2778 return status;
9512135d
TM		 2779out_free_calldata:
2780 kfree(calldata);
2781out:
b39e625b
TM		 2782 nfs4_put_open_state(state);
2783 nfs4_put_state_owner(sp);
9512135d 2784 return status;
1da177e4
LT		 2785}
2786
2b484297 2787static struct inode *
5bc2afc2
TM		 2788nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2789 int open_flags, struct iattr *attr, int *opened)
1da177e4 2790{
1da177e4 2791 struct nfs4_state *state;
aa9c2669
DQ		 2792 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2793
2794 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2795
565277f6 2796 /* Protect against concurrent sillydeletes */
5bc2afc2 2797 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2798
2799 nfs4_label_release_security(label);
2800
f46e0bd3
TM		 2801 if (IS_ERR(state))
2802 return ERR_CAST(state);
275bb307 2803 return state->inode;
1da177e4
LT		 2804}
2805
1185a552 2806static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2807{
2808 if (ctx->state == NULL)
2809 return;
2810 if (is_sync)
643168c2 2811 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2812 else
643168c2 2813 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2814}
1da177e4 2815
b944dba3
TM		 2816#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2817#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2818#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2819
1da177e4
LT		 2820static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2821{
43652ad5
BH		 2822 struct nfs4_server_caps_arg args = {
2823 .fhandle = fhandle,
2824 };
1da177e4
LT		 2825 struct nfs4_server_caps_res res = {};
2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2828 .rpc_argp = &args,
1da177e4
LT		 2829 .rpc_resp = &res,
2830 };
2831 int status;
2832
7c513058 2833 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2834 if (status == 0) {
b944dba3
TM		 2835 /* Sanity check the server answers */
2836 switch (server->nfs_client->cl_minorversion) {
2837 case 0:
2838 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2839 res.attr_bitmask[2] = 0;
2840 break;
2841 case 1:
2842 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2843 break;
2844 case 2:
2845 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2846 }
1da177e4 2847 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2848 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2849 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2850 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2851 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2852 NFS_CAP_CTIME|NFS_CAP_MTIME|
2853 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2854 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2855 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2856 server->caps |= NFS_CAP_ACLS;
2857 if (res.has_links != 0)
2858 server->caps |= NFS_CAP_HARDLINKS;
2859 if (res.has_symlinks != 0)
2860 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2861 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2862 server->caps |= NFS_CAP_FILEID;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2864 server->caps |= NFS_CAP_MODE;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2866 server->caps |= NFS_CAP_NLINK;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2868 server->caps |= NFS_CAP_OWNER;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2870 server->caps |= NFS_CAP_OWNER_GROUP;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2872 server->caps |= NFS_CAP_ATIME;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2874 server->caps |= NFS_CAP_CTIME;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2876 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2877#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2878 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2879 server->caps |= NFS_CAP_SECURITY_LABEL;
2880#endif
2881 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2882 sizeof(server->attr_bitmask));
b944dba3 2883 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2884
a65318bf
TM		 2885 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2886 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2887 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2888 server->cache_consistency_bitmask[2] = 0;
1da177e4 2889 server->acl_bitmask = res.acl_bitmask;
264e6351 2890 server->fh_expire_type = res.fh_expire_type;
1da177e4 2891 }
cccef3b9 2892
1da177e4
LT		 2893 return status;
2894}
2895
55a97593 2896int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2897{
2898 struct nfs4_exception exception = { };
2899 int err;
2900 do {
2901 err = nfs4_handle_exception(server,
2902 _nfs4_server_capabilities(server, fhandle),
2903 &exception);
2904 } while (exception.retry);
2905 return err;
2906}
2907
2908static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2909 struct nfs_fsinfo *info)
2910{
aa9c2669 2911 u32 bitmask[3];
1da177e4 2912 struct nfs4_lookup_root_arg args = {
aa9c2669 2913 .bitmask = bitmask,
1da177e4
LT		 2914 };
2915 struct nfs4_lookup_res res = {
2916 .server = server,
0e574af1 2917 .fattr = info->fattr,
1da177e4
LT		 2918 .fh = fhandle,
2919 };
2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2922 .rpc_argp = &args,
2923 .rpc_resp = &res,
2924 };
008f55d0 2925
aa9c2669
DQ		 2926 bitmask[0] = nfs4_fattr_bitmap[0];
2927 bitmask[1] = nfs4_fattr_bitmap[1];
2928 /*
2929 * Process the label in the upcoming getfattr
2930 */
2931 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2932
0e574af1 2933 nfs_fattr_init(info->fattr);
7c513058 2934 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2935}
2936
2937static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2938 struct nfs_fsinfo *info)
2939{
2940 struct nfs4_exception exception = { };
2941 int err;
2942 do {
fb8a5ba8 2943 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2944 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2945 switch (err) {
2946 case 0:
2947 case -NFS4ERR_WRONGSEC:
05e9cfb4 2948 goto out;
fb8a5ba8
BS		 2949 default:
2950 err = nfs4_handle_exception(server, err, &exception);
2951 }
1da177e4 2952 } while (exception.retry);
05e9cfb4 2953out:
1da177e4
LT		 2954 return err;
2955}
2956
8f70e95f
BS		 2957static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2959{
c2190661
TM		 2960 struct rpc_auth_create_args auth_args = {
2961 .pseudoflavor = flavor,
2962 };
8f70e95f
BS		 2963 struct rpc_auth *auth;
2964 int ret;
2965
c2190661 2966 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2967 if (IS_ERR(auth)) {
75bc8821 2968 ret = -EACCES;
8f70e95f
BS		 2969 goto out;
2970 }
2971 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2972out:
2973 return ret;
2974}
2975
9a744ba3
CL		 2976/*
2977 * Retry pseudoroot lookup with various security flavors. We do this when:
2978 *
2979 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2980 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2981 *
2982 * Returns zero on success, or a negative NFS4ERR value, or a
2983 * negative errno value.
2984 */
801a16dc 2985static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2986 struct nfs_fsinfo *info)
1da177e4 2987{
9a744ba3
CL		 2988 /* Per 3530bis 15.33.5 */
2989 static const rpc_authflavor_t flav_array[] = {
2990 RPC_AUTH_GSS_KRB5P,
2991 RPC_AUTH_GSS_KRB5I,
2992 RPC_AUTH_GSS_KRB5,
c4eafe11 2993 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2994 RPC_AUTH_NULL,
2995 };
2996 int status = -EPERM;
2997 size_t i;
6a1a1e34 2998
4d4b69dd
WAA		 2999 if (server->auth_info.flavor_len > 0) {
3000 /* try each flavor specified by user */
3001 for (i = 0; i < server->auth_info.flavor_len; i++) {
3002 status = nfs4_lookup_root_sec(server, fhandle, info,
3003 server->auth_info.flavors[i]);
3004 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3005 continue;
3006 break;
3007 }
3008 } else {
3009 /* no flavors specified by user, try default list */
3010 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3011 status = nfs4_lookup_root_sec(server, fhandle, info,
3012 flav_array[i]);
3013 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3014 continue;
3015 break;
3016 }
8f70e95f 3017 }
9a744ba3 3018
fb8a5ba8
BS		 3019 /*
3020 * -EACCESS could mean that the user doesn't have correct permissions
3021 * to access the mount. It could also mean that we tried to mount
3022 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3023 * existing mount programs don't handle -EACCES very well so it should
3024 * be mapped to -EPERM instead.
3025 */
3026 if (status == -EACCES)
3027 status = -EPERM;
801a16dc
BS		 3028 return status;
3029}
3030
2ed4b95b
CL		 3031static int nfs4_do_find_root_sec(struct nfs_server *server,
3032 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3033{
3034 int mv = server->nfs_client->cl_minorversion;
3035 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3036}
3037
3038/**
3039 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3040 * @server: initialized nfs_server handle
3041 * @fhandle: we fill in the pseudo-fs root file handle
3042 * @info: we fill in an FSINFO struct
5e6b1990 3043 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3044 *
3045 * Returns zero on success, or a negative errno.
801a16dc 3046 */
3028eb2b 3047int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3048 struct nfs_fsinfo *info,
3049 bool auth_probe)
801a16dc 3050{
2ed4b95b
CL		 3051 int status;
3052
5e6b1990
TM		 3053 switch (auth_probe) {
3054 case false:
3055 status = nfs4_lookup_root(server, fhandle, info);
3056 if (status != -NFS4ERR_WRONGSEC)
3057 break;
5e6b1990 3058 default:
2ed4b95b 3059 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3060 }
2ed4b95b 3061
1da177e4
LT		 3062 if (status == 0)
3063 status = nfs4_server_capabilities(server, fhandle);
3064 if (status == 0)
3065 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3066
c12e87f4 3067 return nfs4_map_errors(status);
1da177e4
LT		 3068}
3069
bae36241
BS		 3070static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3071 struct nfs_fsinfo *info)
3072{
3073 int error;
3074 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3075 struct nfs4_label *label = NULL;
bae36241
BS		 3076
3077 error = nfs4_server_capabilities(server, mntfh);
3078 if (error < 0) {
3079 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3080 return error;
3081 }
3082
14c43f76
DQ		 3083 label = nfs4_label_alloc(server, GFP_KERNEL);
3084 if (IS_ERR(label))
3085 return PTR_ERR(label);
3086
1775fd3e 3087 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3088 if (error < 0) {
3089 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3090 goto err_free_label;
bae36241
BS		 3091 }
3092
3093 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3094 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3095 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3096
14c43f76
DQ		 3097err_free_label:
3098 nfs4_label_free(label);
3099
bae36241
BS		 3100 return error;
3101}
3102
6b97fd3d
MN		 3103/*
3104 * Get locations and (maybe) other attributes of a referral.
3105 * Note that we'll actually follow the referral later when
3106 * we detect fsid mismatch in inode revalidation
3107 */
f05d147f
BS		 3108static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3109 const struct qstr *name, struct nfs_fattr *fattr,
3110 struct nfs_fh *fhandle)
6b97fd3d
MN		 3111{
3112 int status = -ENOMEM;
3113 struct page *page = NULL;
3114 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3115
3116 page = alloc_page(GFP_KERNEL);
3117 if (page == NULL)
3118 goto out;
3119 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3120 if (locations == NULL)
3121 goto out;
3122
f05d147f 3123 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3124 if (status != 0)
3125 goto out;
519ae255
CL		 3126
3127 /*
3128 * If the fsid didn't change, this is a migration event, not a
3129 * referral. Cause us to drop into the exception handler, which
3130 * will kick off migration recovery.
3131 */
6b97fd3d 3132 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3133 dprintk("%s: server did not return a different fsid for"
3134 " a referral at %s\n", __func__, name->name);
519ae255 3135 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3136 goto out;
3137 }
533eb461
AA		 3138 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3139 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3140
533eb461 3141 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3142 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3143 memset(fhandle, 0, sizeof(struct nfs_fh));
3144out:
3145 if (page)
3146 __free_page(page);
5d7ca35a 3147 kfree(locations);
6b97fd3d
MN		 3148 return status;
3149}
3150
1775fd3e
DQ		 3151static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3152 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3153{
3154 struct nfs4_getattr_arg args = {
3155 .fh = fhandle,
3156 .bitmask = server->attr_bitmask,
3157 };
3158 struct nfs4_getattr_res res = {
3159 .fattr = fattr,
1775fd3e 3160 .label = label,
1da177e4
LT		 3161 .server = server,
3162 };
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3165 .rpc_argp = &args,
3166 .rpc_resp = &res,
3167 };
aa9c2669
DQ		 3168
3169 args.bitmask = nfs4_bitmask(server, label);
3170
0e574af1 3171 nfs_fattr_init(fattr);
7c513058 3172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3173}
3174
1775fd3e
DQ		 3175static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3177{
3178 struct nfs4_exception exception = { };
3179 int err;
3180 do {
b5f875a9
TM		 3181 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3182 trace_nfs4_getattr(server, fhandle, fattr, err);
3183 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3184 &exception);
3185 } while (exception.retry);
3186 return err;
3187}
3188
3189/*
3190 * The file is not closed if it is opened due to the a request to change
3191 * the size of the file. The open call will not be needed once the
3192 * VFS layer lookup-intents are implemented.
3193 *
3194 * Close is called when the inode is destroyed.
3195 * If we haven't opened the file for O_WRONLY, we
3196 * need to in the size_change case to obtain a stateid.
3197 *
3198 * Got race?
3199 * Because OPEN is always done by name in nfsv4, it is
3200 * possible that we opened a different file by the same
3201 * name. We can recognize this race condition, but we
3202 * can't do anything about it besides returning an error.
3203 *
3204 * This will be fixed with VFS changes (lookup-intent).
3205 */
3206static int
3207nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3208 struct iattr *sattr)
3209{
08e9eac4 3210 struct inode *inode = dentry->d_inode;
659bfcd6 3211 struct rpc_cred *cred = NULL;
d530838b 3212 struct nfs4_state *state = NULL;
14c43f76 3213 struct nfs4_label *label = NULL;
1da177e4
LT		 3214 int status;
3215
8a1636c4 3216 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3217 pnfs_commit_and_return_layout(inode);
8a1636c4 3218
0e574af1 3219 nfs_fattr_init(fattr);
1da177e4 3220
2669940d
AA		 3221 /* Deal with open(O_TRUNC) */
3222 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3223 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3224
3225 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3226 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3227 return 0;
3228
d530838b 3229 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3230 if (sattr->ia_valid & ATTR_FILE) {
3231 struct nfs_open_context *ctx;
3232
3233 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3234 if (ctx) {
3235 cred = ctx->cred;
3236 state = ctx->state;
3237 }
659bfcd6 3238 }
08e9eac4 3239
14c43f76
DQ		 3240 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3241 if (IS_ERR(label))
3242 return PTR_ERR(label);
3243
3244 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3245 if (status == 0) {
65e4308d 3246 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3247 nfs_setsecurity(inode, fattr, label);
3248 }
14c43f76 3249 nfs4_label_free(label);
1da177e4
LT		 3250 return status;
3251}
3252
0c2e53f1
TM		 3253static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3254 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3255 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3256{
0c2e53f1 3257 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3258 int status;
3259 struct nfs4_lookup_arg args = {
3260 .bitmask = server->attr_bitmask,
0c2e53f1 3261 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3262 .name = name,
3263 };
3264 struct nfs4_lookup_res res = {
3265 .server = server,
3266 .fattr = fattr,
aa9c2669 3267 .label = label,
2b3de441
DH		 3268 .fh = fhandle,
3269 };
3270 struct rpc_message msg = {
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3272 .rpc_argp = &args,
3273 .rpc_resp = &res,
3274 };
3275
aa9c2669
DQ		 3276 args.bitmask = nfs4_bitmask(server, label);
3277
2b3de441
DH		 3278 nfs_fattr_init(fattr);
3279
1da177e4 3280 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3281 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3282 dprintk("NFS reply lookup: %d\n", status);
3283 return status;
3284}
3285
72de53ec 3286static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3287{
7ebb9315 3288 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3289 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3290 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3291 fattr->nlink = 2;
3292}
3293
72de53ec
BS		 3294static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3295 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3296 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3297{
3298 struct nfs4_exception exception = { };
72de53ec 3299 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3300 int err;
3301 do {
1775fd3e 3302 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3303 trace_nfs4_lookup(dir, name, err);
72de53ec 3304 switch (err) {
08ef7bd3 3305 case -NFS4ERR_BADNAME:
72de53ec
BS		 3306 err = -ENOENT;
3307 goto out;
0c2e53f1 3308 case -NFS4ERR_MOVED:
f05d147f 3309 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3310 goto out;
0c2e53f1 3311 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3312 err = -EPERM;
3313 if (client != *clnt)
3314 goto out;
66b06860 3315 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3316 if (IS_ERR(client))
3317 return PTR_ERR(client);
3318
3319 exception.retry = 1;
3320 break;
3321 default:
3322 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3323 }
1da177e4 3324 } while (exception.retry);
72de53ec
BS		 3325
3326out:
3327 if (err == 0)
3328 *clnt = client;
3329 else if (client != *clnt)
3330 rpc_shutdown_client(client);
3331
1da177e4
LT		 3332 return err;
3333}
3334
80a16b21 3335static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3336 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3337 struct nfs4_label *label)
72de53ec
BS		 3338{
3339 int status;
3340 struct rpc_clnt *client = NFS_CLIENT(dir);
3341
1775fd3e 3342 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3343 if (client != NFS_CLIENT(dir)) {
3344 rpc_shutdown_client(client);
3345 nfs_fixup_secinfo_attributes(fattr);
3346 }
3347 return status;
3348}
3349
f05d147f
BS		 3350struct rpc_clnt *
3351nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3352 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3353{
b72888cb 3354 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3355 int status;
f05d147f 3356
1775fd3e 3357 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3358 if (status < 0)
f05d147f 3359 return ERR_PTR(status);
b72888cb 3360 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3361}
3362
1da177e4
LT		 3363static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3364{
76b32999 3365 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3366 struct nfs4_accessargs args = {
3367 .fh = NFS_FH(inode),
a4980e78 3368 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3369 };
3370 struct nfs4_accessres res = {
3371 .server = server,
1da177e4 3372 };
1da177e4
LT		 3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3375 .rpc_argp = &args,
3376 .rpc_resp = &res,
3377 .rpc_cred = entry->cred,
3378 };
3379 int mode = entry->mask;
aa9c2669 3380 int status = 0;
1da177e4
LT		 3381
3382 /*
3383 * Determine which access bits we want to ask for...
3384 */
3385 if (mode & MAY_READ)
3386 args.access |= NFS4_ACCESS_READ;
3387 if (S_ISDIR(inode->i_mode)) {
3388 if (mode & MAY_WRITE)
3389 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3390 if (mode & MAY_EXEC)
3391 args.access |= NFS4_ACCESS_LOOKUP;
3392 } else {
3393 if (mode & MAY_WRITE)
3394 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3395 if (mode & MAY_EXEC)
3396 args.access |= NFS4_ACCESS_EXECUTE;
3397 }
c407d41a
TM		 3398
3399 res.fattr = nfs_alloc_fattr();
3400 if (res.fattr == NULL)
3401 return -ENOMEM;
3402
7c513058 3403 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3404 if (!status) {
6168f62c 3405 nfs_access_set_mask(entry, res.access);
c407d41a 3406 nfs_refresh_inode(inode, res.fattr);
1da177e4 3407 }
c407d41a 3408 nfs_free_fattr(res.fattr);
1da177e4
LT		 3409 return status;
3410}
3411
3412static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3413{
3414 struct nfs4_exception exception = { };
3415 int err;
3416 do {
c1578b76
TM		 3417 err = _nfs4_proc_access(inode, entry);
3418 trace_nfs4_access(inode, err);
3419 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3420 &exception);
3421 } while (exception.retry);
3422 return err;
3423}
3424
3425/*
3426 * TODO: For the time being, we don't try to get any attributes
3427 * along with any of the zero-copy operations READ, READDIR,
3428 * READLINK, WRITE.
3429 *
3430 * In the case of the first three, we want to put the GETATTR
3431 * after the read-type operation -- this is because it is hard
3432 * to predict the length of a GETATTR response in v4, and thus
3433 * align the READ data correctly. This means that the GETATTR
3434 * may end up partially falling into the page cache, and we should
3435 * shift it into the 'tail' of the xdr_buf before processing.
3436 * To do this efficiently, we need to know the total length
3437 * of data received, which doesn't seem to be available outside
3438 * of the RPC layer.
3439 *
3440 * In the case of WRITE, we also want to put the GETATTR after
3441 * the operation -- in this case because we want to make sure
140150db 3442 * we get the post-operation mtime and size.
1da177e4
LT		 3443 *
3444 * Both of these changes to the XDR layer would in fact be quite
3445 * minor, but I decided to leave them for a subsequent patch.
3446 */
3447static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3448 unsigned int pgbase, unsigned int pglen)
3449{
3450 struct nfs4_readlink args = {
3451 .fh = NFS_FH(inode),
3452 .pgbase = pgbase,
3453 .pglen = pglen,
3454 .pages = &page,
3455 };
f50c7000 3456 struct nfs4_readlink_res res;
1da177e4
LT		 3457 struct rpc_message msg = {
3458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3459 .rpc_argp = &args,
f50c7000 3460 .rpc_resp = &res,
1da177e4
LT		 3461 };
3462
7c513058 3463 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3464}
3465
3466static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3467 unsigned int pgbase, unsigned int pglen)
3468{
3469 struct nfs4_exception exception = { };
3470 int err;
3471 do {
c1578b76
TM		 3472 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3473 trace_nfs4_readlink(inode, err);
3474 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3475 &exception);
3476 } while (exception.retry);
3477 return err;
3478}
3479
1da177e4 3480/*
8867fe58 3481 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3482 */
1da177e4
LT		 3483static int
3484nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3485 int flags)
1da177e4 3486{
aa9c2669 3487 struct nfs4_label l, *ilabel = NULL;
8867fe58 3488 struct nfs_open_context *ctx;
1da177e4 3489 struct nfs4_state *state;
5bc2afc2 3490 int opened = 0;
1da177e4
LT		 3491 int status = 0;
3492
8867fe58
MS		 3493 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3494 if (IS_ERR(ctx))
3495 return PTR_ERR(ctx);
3496
aa9c2669
DQ		 3497 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3498
a8a5da99 3499 sattr->ia_mode &= ~current_umask();
5bc2afc2 3500 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3501 if (IS_ERR(state)) {
3502 status = PTR_ERR(state);
c0204fd2 3503 goto out;
1da177e4 3504 }
1da177e4 3505out:
aa9c2669 3506 nfs4_label_release_security(ilabel);
8867fe58 3507 put_nfs_open_context(ctx);
1da177e4
LT		 3508 return status;
3509}
3510
3511static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3512{
16e42959 3513 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3514 struct nfs_removeargs args = {
1da177e4 3515 .fh = NFS_FH(dir),
26fe5750 3516 .name = *name,
16e42959 3517 };
4fdc17b2 3518 struct nfs_removeres res = {
16e42959 3519 .server = server,
1da177e4 3520 };
1da177e4 3521 struct rpc_message msg = {
4fdc17b2
TM		 3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3523 .rpc_argp = &args,
3524 .rpc_resp = &res,
1da177e4 3525 };
778d2817 3526 int status;
1da177e4 3527
7c513058 3528 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3529 if (status == 0)
16e42959 3530 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3531 return status;
3532}
3533
3534static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3535{
3536 struct nfs4_exception exception = { };
3537 int err;
3538 do {
078ea3df
TM		 3539 err = _nfs4_proc_remove(dir, name);
3540 trace_nfs4_remove(dir, name, err);
3541 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3542 &exception);
3543 } while (exception.retry);
3544 return err;
3545}
3546
e4eff1a6 3547static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3548{
e4eff1a6
TM		 3549 struct nfs_server *server = NFS_SERVER(dir);
3550 struct nfs_removeargs *args = msg->rpc_argp;
3551 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3552
e4eff1a6 3553 res->server = server;
1da177e4 3554 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3555 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3556
3557 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3558}
3559
34e137cc
BS		 3560static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3561{
d9afbd1b
TM		 3562 nfs4_setup_sequence(NFS_SERVER(data->dir),
3563 &data->args.seq_args,
3564 &data->res.seq_res,
3565 task);
1da177e4
LT		 3566}
3567
e4eff1a6 3568static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3569{
078ea3df
TM		 3570 struct nfs_unlinkdata *data = task->tk_calldata;
3571 struct nfs_removeres *res = &data->res;
e4eff1a6 3572
14516c3a
TM		 3573 if (!nfs4_sequence_done(task, &res->seq_res))
3574 return 0;
9e33bed5 3575 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3576 return 0;
3577 update_changeattr(dir, &res->cinfo);
e4eff1a6 3578 return 1;
1da177e4
LT		 3579}
3580
d3d4152a
JL		 3581static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3582{
3583 struct nfs_server *server = NFS_SERVER(dir);
3584 struct nfs_renameargs *arg = msg->rpc_argp;
3585 struct nfs_renameres *res = msg->rpc_resp;
3586
3587 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3588 res->server = server;
a9c92d6b 3589 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3590}
3591
c6bfa1a1
BS		 3592static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3593{
d9afbd1b
TM		 3594 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3595 &data->args.seq_args,
3596 &data->res.seq_res,
3597 task);
d3d4152a
JL		 3598}
3599
3600static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3601 struct inode *new_dir)
3602{
fbc6f7c2
TM		 3603 struct nfs_renamedata *data = task->tk_calldata;
3604 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3605
3606 if (!nfs4_sequence_done(task, &res->seq_res))
3607 return 0;
3608 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3609 return 0;
3610
3611 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3612 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3613 return 1;
3614}
3615
1da177e4
LT		 3616static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3617{
91ba2eee 3618 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3619 struct nfs4_link_arg arg = {
3620 .fh = NFS_FH(inode),
3621 .dir_fh = NFS_FH(dir),
3622 .name = name,
91ba2eee
TM		 3623 .bitmask = server->attr_bitmask,
3624 };
91ba2eee
TM		 3625 struct nfs4_link_res res = {
3626 .server = server,
1775fd3e 3627 .label = NULL,
1da177e4 3628 };
1da177e4
LT		 3629 struct rpc_message msg = {
3630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3631 .rpc_argp = &arg,
91ba2eee 3632 .rpc_resp = &res,
1da177e4 3633 };
136f2627
TM		 3634 int status = -ENOMEM;
3635
3636 res.fattr = nfs_alloc_fattr();
778d2817 3637 if (res.fattr == NULL)
136f2627 3638 goto out;
1da177e4 3639
14c43f76
DQ		 3640 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3641 if (IS_ERR(res.label)) {
3642 status = PTR_ERR(res.label);
3643 goto out;
3644 }
aa9c2669 3645 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3646
7c513058 3647 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3648 if (!status) {
3649 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3650 status = nfs_post_op_update_inode(inode, res.fattr);
3651 if (!status)
3652 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3653 }
14c43f76
DQ		 3654
3655
3656 nfs4_label_free(res.label);
3657
136f2627 3658out:
136f2627 3659 nfs_free_fattr(res.fattr);
1da177e4
LT		 3660 return status;
3661}
3662
3663static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3664{
3665 struct nfs4_exception exception = { };
3666 int err;
3667 do {
3668 err = nfs4_handle_exception(NFS_SERVER(inode),
3669 _nfs4_proc_link(inode, dir, name),
3670 &exception);
3671 } while (exception.retry);
3672 return err;
3673}
3674
57dc9a57
TM		 3675struct nfs4_createdata {
3676 struct rpc_message msg;
3677 struct nfs4_create_arg arg;
3678 struct nfs4_create_res res;
3679 struct nfs_fh fh;
3680 struct nfs_fattr fattr;
1775fd3e 3681 struct nfs4_label *label;
57dc9a57
TM		 3682};
3683
3684static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3685 struct qstr *name, struct iattr *sattr, u32 ftype)
3686{
3687 struct nfs4_createdata *data;
3688
3689 data = kzalloc(sizeof(*data), GFP_KERNEL);
3690 if (data != NULL) {
3691 struct nfs_server *server = NFS_SERVER(dir);
3692
14c43f76
DQ		 3693 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3694 if (IS_ERR(data->label))
3695 goto out_free;
3696
57dc9a57
TM		 3697 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3698 data->msg.rpc_argp = &data->arg;
3699 data->msg.rpc_resp = &data->res;
3700 data->arg.dir_fh = NFS_FH(dir);
3701 data->arg.server = server;
3702 data->arg.name = name;
3703 data->arg.attrs = sattr;
3704 data->arg.ftype = ftype;
aa9c2669 3705 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3706 data->res.server = server;
3707 data->res.fh = &data->fh;
3708 data->res.fattr = &data->fattr;
1775fd3e 3709 data->res.label = data->label;
57dc9a57 3710 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3711 }
3712 return data;
14c43f76
DQ		 3713out_free:
3714 kfree(data);
3715 return NULL;
57dc9a57
TM		 3716}
3717
3718static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3719{
7c513058 3720 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3721 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3722 if (status == 0) {
3723 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3724 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3725 }
3726 return status;
3727}
3728
3729static void nfs4_free_createdata(struct nfs4_createdata *data)
3730{
14c43f76 3731 nfs4_label_free(data->label);
57dc9a57
TM		 3732 kfree(data);
3733}
3734
4f390c15 3735static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3736 struct page *page, unsigned int len, struct iattr *sattr,
3737 struct nfs4_label *label)
1da177e4 3738{
57dc9a57
TM		 3739 struct nfs4_createdata *data;
3740 int status = -ENAMETOOLONG;
1da177e4 3741
94a6d753 3742 if (len > NFS4_MAXPATHLEN)
57dc9a57 3743 goto out;
4f390c15 3744
57dc9a57
TM		 3745 status = -ENOMEM;
3746 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3747 if (data == NULL)
3748 goto out;
3749
3750 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3751 data->arg.u.symlink.pages = &page;
3752 data->arg.u.symlink.len = len;
1775fd3e 3753 data->arg.label = label;
1da177e4 3754
57dc9a57
TM		 3755 status = nfs4_do_create(dir, dentry, data);
3756
3757 nfs4_free_createdata(data);
3758out:
1da177e4
LT		 3759 return status;
3760}
3761
4f390c15 3762static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3763 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3764{
3765 struct nfs4_exception exception = { };
aa9c2669 3766 struct nfs4_label l, *label = NULL;
1da177e4 3767 int err;
aa9c2669
DQ		 3768
3769 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3770
1da177e4 3771 do {
078ea3df
TM		 3772 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3773 trace_nfs4_symlink(dir, &dentry->d_name, err);
3774 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3775 &exception);
3776 } while (exception.retry);
aa9c2669
DQ		 3777
3778 nfs4_label_release_security(label);
1da177e4
LT		 3779 return err;
3780}
3781
3782static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3783 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3784{
57dc9a57
TM		 3785 struct nfs4_createdata *data;
3786 int status = -ENOMEM;
1da177e4 3787
57dc9a57
TM		 3788 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3789 if (data == NULL)
3790 goto out;
3791
1775fd3e 3792 data->arg.label = label;
57dc9a57
TM		 3793 status = nfs4_do_create(dir, dentry, data);
3794
3795 nfs4_free_createdata(data);
3796out:
1da177e4
LT		 3797 return status;
3798}
3799
3800static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3801 struct iattr *sattr)
3802{
3803 struct nfs4_exception exception = { };
aa9c2669 3804 struct nfs4_label l, *label = NULL;
1da177e4 3805 int err;
a8a5da99 3806
aa9c2669
DQ		 3807 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3808
a8a5da99 3809 sattr->ia_mode &= ~current_umask();
1da177e4 3810 do {
078ea3df
TM		 3811 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3812 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3813 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3814 &exception);
3815 } while (exception.retry);
aa9c2669
DQ		 3816 nfs4_label_release_security(label);
3817
1da177e4
LT		 3818 return err;
3819}
3820
3821static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3822 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3823{
3824 struct inode *dir = dentry->d_inode;
3825 struct nfs4_readdir_arg args = {
3826 .fh = NFS_FH(dir),
56e4ebf8 3827 .pages = pages,
1da177e4
LT		 3828 .pgbase = 0,
3829 .count = count,
96d25e53 3830 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3831 .plus = plus,
1da177e4
LT		 3832 };
3833 struct nfs4_readdir_res res;
3834 struct rpc_message msg = {
3835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3836 .rpc_argp = &args,
3837 .rpc_resp = &res,
3838 .rpc_cred = cred,
3839 };
3840 int status;
3841
6de1472f
AV		 3842 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3843 dentry,
eadf4598 3844 (unsigned long long)cookie);
c3f52af3 3845 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3846 res.pgbase = args.pgbase;
7c513058 3847 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3848 if (status >= 0) {
c3f52af3 3849 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3850 status += args.pgbase;
3851 }
c4812998
TM		 3852
3853 nfs_invalidate_atime(dir);
3854
3110ff80 3855 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3856 return status;
3857}
3858
3859static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3860 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3861{
3862 struct nfs4_exception exception = { };
3863 int err;
3864 do {
c1578b76
TM		 3865 err = _nfs4_proc_readdir(dentry, cred, cookie,
3866 pages, count, plus);
3867 trace_nfs4_readdir(dentry->d_inode, err);
3868 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3869 &exception);
3870 } while (exception.retry);
3871 return err;
3872}
3873
3874static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3875 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3876{
57dc9a57
TM		 3877 struct nfs4_createdata *data;
3878 int mode = sattr->ia_mode;
3879 int status = -ENOMEM;
1da177e4 3880
57dc9a57
TM		 3881 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3882 if (data == NULL)
3883 goto out;
3884
1da177e4 3885 if (S_ISFIFO(mode))
57dc9a57 3886 data->arg.ftype = NF4FIFO;
1da177e4 3887 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3888 data->arg.ftype = NF4BLK;
3889 data->arg.u.device.specdata1 = MAJOR(rdev);
3890 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3891 }
3892 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3893 data->arg.ftype = NF4CHR;
3894 data->arg.u.device.specdata1 = MAJOR(rdev);
3895 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3896 } else if (!S_ISSOCK(mode)) {
3897 status = -EINVAL;
3898 goto out_free;
1da177e4 3899 }
1775fd3e 3900
aa9c2669 3901 data->arg.label = label;
57dc9a57 3902 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3903out_free:
57dc9a57
TM		 3904 nfs4_free_createdata(data);
3905out:
1da177e4
LT		 3906 return status;
3907}
3908
3909static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3910 struct iattr *sattr, dev_t rdev)
3911{
3912 struct nfs4_exception exception = { };
aa9c2669 3913 struct nfs4_label l, *label = NULL;
1da177e4 3914 int err;
a8a5da99 3915
aa9c2669
DQ		 3916 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3917
a8a5da99 3918 sattr->ia_mode &= ~current_umask();
1da177e4 3919 do {
078ea3df
TM		 3920 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3921 trace_nfs4_mknod(dir, &dentry->d_name, err);
3922 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3923 &exception);
3924 } while (exception.retry);
aa9c2669
DQ		 3925
3926 nfs4_label_release_security(label);
3927
1da177e4
LT		 3928 return err;
3929}
3930
3931static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3932 struct nfs_fsstat *fsstat)
3933{
3934 struct nfs4_statfs_arg args = {
3935 .fh = fhandle,
3936 .bitmask = server->attr_bitmask,
3937 };
24ad148a
BH		 3938 struct nfs4_statfs_res res = {
3939 .fsstat = fsstat,
3940 };
1da177e4
LT		 3941 struct rpc_message msg = {
3942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3943 .rpc_argp = &args,
24ad148a 3944 .rpc_resp = &res,
1da177e4
LT		 3945 };
3946
0e574af1 3947 nfs_fattr_init(fsstat->fattr);
7c513058 3948 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3949}
3950
3951static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3952{
3953 struct nfs4_exception exception = { };
3954 int err;
3955 do {
3956 err = nfs4_handle_exception(server,
3957 _nfs4_proc_statfs(server, fhandle, fsstat),
3958 &exception);
3959 } while (exception.retry);
3960 return err;
3961}
3962
3963static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3964 struct nfs_fsinfo *fsinfo)
3965{
3966 struct nfs4_fsinfo_arg args = {
3967 .fh = fhandle,
3968 .bitmask = server->attr_bitmask,
3969 };
3dda5e43
BH		 3970 struct nfs4_fsinfo_res res = {
3971 .fsinfo = fsinfo,
3972 };
1da177e4
LT		 3973 struct rpc_message msg = {
3974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3975 .rpc_argp = &args,
3dda5e43 3976 .rpc_resp = &res,
1da177e4
LT		 3977 };
3978
7c513058 3979 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3980}
3981
3982static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3983{
3984 struct nfs4_exception exception = { };
83ca7f5a 3985 unsigned long now = jiffies;
1da177e4
LT		 3986 int err;
3987
3988 do {
83ca7f5a 3989 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3990 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3991 if (err == 0) {
3992 struct nfs_client *clp = server->nfs_client;
3993
3994 spin_lock(&clp->cl_lock);
3995 clp->cl_lease_time = fsinfo->lease_time * HZ;
3996 clp->cl_last_renewal = now;
3997 spin_unlock(&clp->cl_lock);
3998 break;
3999 }
4000 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4001 } while (exception.retry);
4002 return err;
4003}
4004
4005static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4006{
e38eb650
BS		 4007 int error;
4008
0e574af1 4009 nfs_fattr_init(fsinfo->fattr);
e38eb650 4010 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4011 if (error == 0) {
4012 /* block layout checks this! */
4013 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4014 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4015 }
e38eb650
BS		 4016
4017 return error;
1da177e4
LT		 4018}
4019
4020static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4021 struct nfs_pathconf *pathconf)
4022{
4023 struct nfs4_pathconf_arg args = {
4024 .fh = fhandle,
4025 .bitmask = server->attr_bitmask,
4026 };
d45b2989
BH		 4027 struct nfs4_pathconf_res res = {
4028 .pathconf = pathconf,
4029 };
1da177e4
LT		 4030 struct rpc_message msg = {
4031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4032 .rpc_argp = &args,
d45b2989 4033 .rpc_resp = &res,
1da177e4
LT		 4034 };
4035
4036 /* None of the pathconf attributes are mandatory to implement */
4037 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4038 memset(pathconf, 0, sizeof(*pathconf));
4039 return 0;
4040 }
4041
0e574af1 4042 nfs_fattr_init(pathconf->fattr);
7c513058 4043 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4044}
4045
4046static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4047 struct nfs_pathconf *pathconf)
4048{
4049 struct nfs4_exception exception = { };
4050 int err;
4051
4052 do {
4053 err = nfs4_handle_exception(server,
4054 _nfs4_proc_pathconf(server, fhandle, pathconf),
4055 &exception);
4056 } while (exception.retry);
4057 return err;
4058}
4059
5521abfd 4060int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4061 const struct nfs_open_context *ctx,
4062 const struct nfs_lock_context *l_ctx,
4063 fmode_t fmode)
4064{
4065 const struct nfs_lockowner *lockowner = NULL;
4066
4067 if (l_ctx != NULL)
4068 lockowner = &l_ctx->lockowner;
5521abfd 4069 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4070}
4071EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4072
5521abfd
TM		 4073static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4074 const struct nfs_open_context *ctx,
4075 const struct nfs_lock_context *l_ctx,
4076 fmode_t fmode)
4077{
4078 nfs4_stateid current_stateid;
4079
e1253be0
TM		 4080 /* If the current stateid represents a lost lock, then exit */
4081 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4082 return true;
5521abfd
TM		 4083 return nfs4_stateid_match(stateid, &current_stateid);
4084}
4085
4086static bool nfs4_error_stateid_expired(int err)
4087{
4088 switch (err) {
4089 case -NFS4ERR_DELEG_REVOKED:
4090 case -NFS4ERR_ADMIN_REVOKED:
4091 case -NFS4ERR_BAD_STATEID:
4092 case -NFS4ERR_STALE_STATEID:
4093 case -NFS4ERR_OLD_STATEID:
4094 case -NFS4ERR_OPENMODE:
4095 case -NFS4ERR_EXPIRED:
4096 return true;
4097 }
4098 return false;
4099}
4100
d45f60c6 4101void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4102{
d45f60c6 4103 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4104}
4105
d45f60c6 4106static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4107{
d45f60c6 4108 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4109
d45f60c6
WAA		 4110 trace_nfs4_read(hdr, task->tk_status);
4111 if (nfs4_async_handle_error(task, server,
4112 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4113 rpc_restart_call_prepare(task);
ec06c096 4114 return -EAGAIN;
1da177e4 4115 }
8850df99 4116
d45f60c6 4117 __nfs4_read_done_cb(hdr);
1da177e4 4118 if (task->tk_status > 0)
d45f60c6 4119 renew_lease(server, hdr->timestamp);
ec06c096 4120 return 0;
1da177e4
LT		 4121}
4122
5521abfd 4123static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4124 struct nfs_pgio_args *args)
5521abfd
TM		 4125{
4126
4127 if (!nfs4_error_stateid_expired(task->tk_status) ||
4128 nfs4_stateid_is_current(&args->stateid,
4129 args->context,
4130 args->lock_context,
4131 FMODE_READ))
4132 return false;
4133 rpc_restart_call_prepare(task);
4134 return true;
4135}
4136
d45f60c6 4137static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4138{
4139
4140 dprintk("--> %s\n", __func__);
4141
d45f60c6 4142 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4143 return -EAGAIN;
d45f60c6 4144 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4145 return -EAGAIN;
d45f60c6
WAA		 4146 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4147 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4148}
4149
d45f60c6
WAA		 4150static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4151 struct rpc_message *msg)
1da177e4 4152{
d45f60c6
WAA		 4153 hdr->timestamp = jiffies;
4154 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4155 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4156 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4157}
4158
d45f60c6
WAA		 4159static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4160 struct nfs_pgio_header *hdr)
ea7c3303 4161{
d45f60c6
WAA		 4162 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4163 &hdr->args.seq_args,
4164 &hdr->res.seq_res,
9b206149 4165 task))
ef1820f9 4166 return 0;
d45f60c6
WAA		 4167 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4168 hdr->args.lock_context,
4169 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4170 return -EIO;
d45f60c6 4171 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4172 return -EIO;
4173 return 0;
1da177e4
LT		 4174}
4175
d45f60c6
WAA		 4176static int nfs4_write_done_cb(struct rpc_task *task,
4177 struct nfs_pgio_header *hdr)
1da177e4 4178{
d45f60c6 4179 struct inode *inode = hdr->inode;
1da177e4 4180
d45f60c6
WAA		 4181 trace_nfs4_write(hdr, task->tk_status);
4182 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4183 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4184 rpc_restart_call_prepare(task);
788e7a89 4185 return -EAGAIN;
1da177e4 4186 }
4f9838c7 4187 if (task->tk_status >= 0) {
d45f60c6
WAA		 4188 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4189 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4190 }
788e7a89 4191 return 0;
1da177e4
LT		 4192}
4193
5521abfd 4194static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4195 struct nfs_pgio_args *args)
5521abfd
TM		 4196{
4197
4198 if (!nfs4_error_stateid_expired(task->tk_status) ||
4199 nfs4_stateid_is_current(&args->stateid,
4200 args->context,
4201 args->lock_context,
4202 FMODE_WRITE))
4203 return false;
4204 rpc_restart_call_prepare(task);
4205 return true;
4206}
4207
d45f60c6 4208static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4209{
d45f60c6 4210 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4211 return -EAGAIN;
d45f60c6 4212 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4213 return -EAGAIN;
d45f60c6
WAA		 4214 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4215 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4216}
4217
5a37f851 4218static
d45f60c6 4219bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4220{
5a37f851 4221 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4222 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4223 return false;
4224 /* Otherwise, request attributes if and only if we don't hold
4225 * a delegation
4226 */
011e2a7f 4227 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4228}
a69aef14 4229
d45f60c6
WAA		 4230static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4231 struct rpc_message *msg)
1da177e4 4232{
d45f60c6 4233 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4234
d45f60c6
WAA		 4235 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4236 hdr->args.bitmask = NULL;
4237 hdr->res.fattr = NULL;
7ffd1064 4238 } else
d45f60c6 4239 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4240
d45f60c6
WAA		 4241 if (!hdr->pgio_done_cb)
4242 hdr->pgio_done_cb = nfs4_write_done_cb;
4243 hdr->res.server = server;
4244 hdr->timestamp = jiffies;
1da177e4 4245
bdc7f021 4246 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4247 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4248}
4249
0b7c0153 4250static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4251{
d9afbd1b
TM		 4252 nfs4_setup_sequence(NFS_SERVER(data->inode),
4253 &data->args.seq_args,
4254 &data->res.seq_res,
4255 task);
1da177e4
LT		 4256}
4257
0b7c0153 4258static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4259{
1da177e4 4260 struct inode *inode = data->inode;
14516c3a 4261
cc668ab3 4262 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4263 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4264 rpc_restart_call_prepare(task);
788e7a89 4265 return -EAGAIN;
1da177e4 4266 }
788e7a89 4267 return 0;
1da177e4
LT		 4268}
4269
0b7c0153 4270static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4271{
4272 if (!nfs4_sequence_done(task, &data->res.seq_res))
4273 return -EAGAIN;
0b7c0153 4274 return data->commit_done_cb(task, data);
5f452431
FI		 4275}
4276
0b7c0153 4277static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4278{
788e7a89 4279 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4280
0b7c0153
FI		 4281 if (data->commit_done_cb == NULL)
4282 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4283 data->res.server = server;
bdc7f021 4284 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4285 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4286}
4287
9bc4e3ca
CL		 4288struct nfs4_renewdata {
4289 struct nfs_client *client;
4290 unsigned long timestamp;
4291};
4292
1da177e4
LT		 4293/*
4294 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4295 * standalone procedure for queueing an asynchronous RENEW.
4296 */
9bc4e3ca 4297static void nfs4_renew_release(void *calldata)
dc96aef9 4298{
9bc4e3ca
CL		 4299 struct nfs4_renewdata *data = calldata;
4300 struct nfs_client *clp = data->client;
dc96aef9 4301
0851de06
AB		 4302 if (atomic_read(&clp->cl_count) > 1)
4303 nfs4_schedule_state_renewal(clp);
4304 nfs_put_client(clp);
9bc4e3ca 4305 kfree(data);
dc96aef9
AB		 4306}
4307
9bc4e3ca 4308static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4309{
9bc4e3ca
CL		 4310 struct nfs4_renewdata *data = calldata;
4311 struct nfs_client *clp = data->client;
4312 unsigned long timestamp = data->timestamp;
1da177e4 4313
c6d01c6f 4314 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4315 switch (task->tk_status) {
4316 case 0:
4317 break;
4318 case -NFS4ERR_LEASE_MOVED:
4319 nfs4_schedule_lease_moved_recovery(clp);
4320 break;
4321 default:
95baa25c 4322 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4323 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4324 return;
4325 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4326 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4327 return;
4328 }
4329 nfs4_schedule_path_down_recovery(clp);
1da177e4 4330 }
452e9352 4331 do_renew_lease(clp, timestamp);
1da177e4
LT		 4332}
4333
963d8fe5
TM		 4334static const struct rpc_call_ops nfs4_renew_ops = {
4335 .rpc_call_done = nfs4_renew_done,
dc96aef9 4336 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4337};
4338
2f60ea6b 4339static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4340{
4341 struct rpc_message msg = {
4342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4343 .rpc_argp = clp,
b4454fe1 4344 .rpc_cred = cred,
1da177e4 4345 };
9bc4e3ca 4346 struct nfs4_renewdata *data;
1da177e4 4347
2f60ea6b
TM		 4348 if (renew_flags == 0)
4349 return 0;
0851de06
AB		 4350 if (!atomic_inc_not_zero(&clp->cl_count))
4351 return -EIO;
b569ad34 4352 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4353 if (data == NULL)
4354 return -ENOMEM;
4355 data->client = clp;
4356 data->timestamp = jiffies;
bc7a05ca 4357 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4358 &nfs4_renew_ops, data);
1da177e4
LT		 4359}
4360
8534d4ec 4361static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4362{
4363 struct rpc_message msg = {
4364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4365 .rpc_argp = clp,
b4454fe1 4366 .rpc_cred = cred,
1da177e4
LT		 4367 };
4368 unsigned long now = jiffies;
4369 int status;
4370
bc7a05ca 4371 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4372 if (status < 0)
4373 return status;
452e9352 4374 do_renew_lease(clp, now);
1da177e4
LT		 4375 return 0;
4376}
4377
aa1870af
BF		 4378static inline int nfs4_server_supports_acls(struct nfs_server *server)
4379{
7dd7d959 4380 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4381}
4382
21f498c2
TM		 4383/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4384 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4385 * the stack.
4386 */
21f498c2 4387#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4388
e9e3d724
NH		 4389static int buf_to_pages_noslab(const void *buf, size_t buflen,
4390 struct page **pages, unsigned int *pgbase)
4391{
4392 struct page *newpage, **spages;
4393 int rc = 0;
4394 size_t len;
4395 spages = pages;
4396
4397 do {
21f498c2 4398 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4399 newpage = alloc_page(GFP_KERNEL);
4400
4401 if (newpage == NULL)
4402 goto unwind;
4403 memcpy(page_address(newpage), buf, len);
4404 buf += len;
4405 buflen -= len;
4406 *pages++ = newpage;
4407 rc++;
4408 } while (buflen != 0);
4409
4410 return rc;
4411
4412unwind:
4413 for(; rc > 0; rc--)
4414 __free_page(spages[rc-1]);
4415 return -ENOMEM;
4416}
4417
e50a1c2e
BF		 4418struct nfs4_cached_acl {
4419 int cached;
4420 size_t len;
3e9d4154 4421 char data[0];
e50a1c2e
BF		 4422};
4423
4424static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4425{
4426 struct nfs_inode *nfsi = NFS_I(inode);
4427
4428 spin_lock(&inode->i_lock);
4429 kfree(nfsi->nfs4_acl);
4430 nfsi->nfs4_acl = acl;
4431 spin_unlock(&inode->i_lock);
4432}
4433
4434static void nfs4_zap_acl_attr(struct inode *inode)
4435{
4436 nfs4_set_cached_acl(inode, NULL);
4437}
4438
4439static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4440{
4441 struct nfs_inode *nfsi = NFS_I(inode);
4442 struct nfs4_cached_acl *acl;
4443 int ret = -ENOENT;
4444
4445 spin_lock(&inode->i_lock);
4446 acl = nfsi->nfs4_acl;
4447 if (acl == NULL)
4448 goto out;
4449 if (buf == NULL) /* user is just asking for length */
4450 goto out_len;
4451 if (acl->cached == 0)
4452 goto out;
4453 ret = -ERANGE; /* see getxattr(2) man page */
4454 if (acl->len > buflen)
4455 goto out;
4456 memcpy(buf, acl->data, acl->len);
4457out_len:
4458 ret = acl->len;
4459out:
4460 spin_unlock(&inode->i_lock);
4461 return ret;
4462}
4463
5794d21e 4464static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4465{
4466 struct nfs4_cached_acl *acl;
b291f1b1 4467 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4468
1f1ea6c2 4469 if (buflen <= PAGE_SIZE) {
b291f1b1 4470 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4471 if (acl == NULL)
4472 goto out;
4473 acl->cached = 1;
5794d21e 4474 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4475 } else {
4476 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4477 if (acl == NULL)
4478 goto out;
4479 acl->cached = 0;
4480 }
4481 acl->len = acl_len;
4482out:
4483 nfs4_set_cached_acl(inode, acl);
4484}
4485
bf118a34
AA		 4486/*
4487 * The getxattr API returns the required buffer length when called with a
4488 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4489 * the required buf. On a NULL buf, we send a page of data to the server
4490 * guessing that the ACL request can be serviced by a page. If so, we cache
4491 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4492 * the cache. If not so, we throw away the page, and cache the required
4493 * length. The next getxattr call will then produce another round trip to
4494 * the server, this time with the input buf of the required size.
4495 */
16b4289c 4496static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4497{
bf118a34 4498 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4499 struct nfs_getaclargs args = {
4500 .fh = NFS_FH(inode),
4501 .acl_pages = pages,
4502 .acl_len = buflen,
4503 };
663c79b3
BH		 4504 struct nfs_getaclres res = {
4505 .acl_len = buflen,
4506 };
aa1870af
BF		 4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4509 .rpc_argp = &args,
663c79b3 4510 .rpc_resp = &res,
aa1870af 4511 };
21f498c2
TM		 4512 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4513 int ret = -ENOMEM, i;
aa1870af 4514
bf118a34
AA		 4515 /* As long as we're doing a round trip to the server anyway,
4516 * let's be prepared for a page of acl data. */
4517 if (npages == 0)
4518 npages = 1;
21f498c2
TM		 4519 if (npages > ARRAY_SIZE(pages))
4520 return -ERANGE;
5a006899 4521
bf118a34
AA		 4522 for (i = 0; i < npages; i++) {
4523 pages[i] = alloc_page(GFP_KERNEL);
4524 if (!pages[i])
4525 goto out_free;
e50a1c2e 4526 }
5a006899
SP		 4527
4528 /* for decoding across pages */
4529 res.acl_scratch = alloc_page(GFP_KERNEL);
4530 if (!res.acl_scratch)
4531 goto out_free;
4532
bf118a34
AA		 4533 args.acl_len = npages * PAGE_SIZE;
4534 args.acl_pgbase = 0;
5a006899 4535
de040bec 4536 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4537 __func__, buf, buflen, npages, args.acl_len);
4538 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4539 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4540 if (ret)
4541 goto out_free;
bf118a34 4542
1f1ea6c2
TM		 4543 /* Handle the case where the passed-in buffer is too short */
4544 if (res.acl_flags & NFS4_ACL_TRUNC) {
4545 /* Did the user only issue a request for the acl length? */
4546 if (buf == NULL)
4547 goto out_ok;
e50a1c2e 4548 ret = -ERANGE;
1f1ea6c2 4549 goto out_free;
e50a1c2e 4550 }
1f1ea6c2 4551 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4552 if (buf) {
4553 if (res.acl_len > buflen) {
4554 ret = -ERANGE;
4555 goto out_free;
4556 }
1f1ea6c2 4557 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4558 }
1f1ea6c2
TM		 4559out_ok:
4560 ret = res.acl_len;
e50a1c2e 4561out_free:
bf118a34
AA		 4562 for (i = 0; i < npages; i++)
4563 if (pages[i])
4564 __free_page(pages[i]);
331818f1
TM		 4565 if (res.acl_scratch)
4566 __free_page(res.acl_scratch);
aa1870af
BF		 4567 return ret;
4568}
4569
16b4289c
TM		 4570static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4571{
4572 struct nfs4_exception exception = { };
4573 ssize_t ret;
4574 do {
4575 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4576 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4577 if (ret >= 0)
4578 break;
4579 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4580 } while (exception.retry);
4581 return ret;
4582}
4583
e50a1c2e
BF		 4584static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4585{
4586 struct nfs_server *server = NFS_SERVER(inode);
4587 int ret;
4588
4589 if (!nfs4_server_supports_acls(server))
4590 return -EOPNOTSUPP;
4591 ret = nfs_revalidate_inode(server, inode);
4592 if (ret < 0)
4593 return ret;
08a22b39
AK		 4594 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4595 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4596 ret = nfs4_read_cached_acl(inode, buf, buflen);
4597 if (ret != -ENOENT)
bf118a34
AA		 4598 /* -ENOENT is returned if there is no ACL or if there is an ACL
4599 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4600 return ret;
4601 return nfs4_get_acl_uncached(inode, buf, buflen);
4602}
4603
16b4289c 4604static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4605{
4606 struct nfs_server *server = NFS_SERVER(inode);
4607 struct page *pages[NFS4ACL_MAXPAGES];
4608 struct nfs_setaclargs arg = {
4609 .fh = NFS_FH(inode),
4610 .acl_pages = pages,
4611 .acl_len = buflen,
4612 };
73c403a9 4613 struct nfs_setaclres res;
4b580ee3
BF		 4614 struct rpc_message msg = {
4615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4616 .rpc_argp = &arg,
73c403a9 4617 .rpc_resp = &res,
4b580ee3 4618 };
21f498c2 4619 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4620 int ret, i;
4b580ee3
BF		 4621
4622 if (!nfs4_server_supports_acls(server))
4623 return -EOPNOTSUPP;
21f498c2
TM		 4624 if (npages > ARRAY_SIZE(pages))
4625 return -ERANGE;
e9e3d724
NH		 4626 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4627 if (i < 0)
4628 return i;
57ec14c5 4629 nfs4_inode_return_delegation(inode);
7c513058 4630 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4631
4632 /*
4633 * Free each page after tx, so the only ref left is
4634 * held by the network stack
4635 */
4636 for (; i > 0; i--)
4637 put_page(pages[i-1]);
4638
08a22b39
AK		 4639 /*
4640 * Acl update can result in inode attribute update.
4641 * so mark the attribute cache invalid.
4642 */
4643 spin_lock(&inode->i_lock);
4644 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4645 spin_unlock(&inode->i_lock);
f41f7418
TM		 4646 nfs_access_zap_cache(inode);
4647 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4648 return ret;
4649}
4650
16b4289c
TM		 4651static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4652{
4653 struct nfs4_exception exception = { };
4654 int err;
4655 do {
c1578b76
TM		 4656 err = __nfs4_proc_set_acl(inode, buf, buflen);
4657 trace_nfs4_set_acl(inode, err);
4658 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4659 &exception);
4660 } while (exception.retry);
4661 return err;
4662}
4663
aa9c2669
DQ		 4664#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4665static int _nfs4_get_security_label(struct inode *inode, void *buf,
4666 size_t buflen)
4667{
4668 struct nfs_server *server = NFS_SERVER(inode);
4669 struct nfs_fattr fattr;
4670 struct nfs4_label label = {0, 0, buflen, buf};
4671
4672 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4673 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4674 .fh = NFS_FH(inode),
4675 .bitmask = bitmask,
4676 };
4677 struct nfs4_getattr_res res = {
4678 .fattr = &fattr,
4679 .label = &label,
4680 .server = server,
4681 };
4682 struct rpc_message msg = {
4683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4684 .rpc_argp = &arg,
aa9c2669
DQ		 4685 .rpc_resp = &res,
4686 };
4687 int ret;
4688
4689 nfs_fattr_init(&fattr);
4690
fcb63a9b 4691 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4692 if (ret)
4693 return ret;
4694 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4695 return -ENOENT;
4696 if (buflen < label.len)
4697 return -ERANGE;
4698 return 0;
4699}
4700
4701static int nfs4_get_security_label(struct inode *inode, void *buf,
4702 size_t buflen)
4703{
4704 struct nfs4_exception exception = { };
4705 int err;
4706
4707 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4708 return -EOPNOTSUPP;
4709
4710 do {
c1578b76
TM		 4711 err = _nfs4_get_security_label(inode, buf, buflen);
4712 trace_nfs4_get_security_label(inode, err);
4713 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4714 &exception);
4715 } while (exception.retry);
4716 return err;
4717}
4718
4719static int _nfs4_do_set_security_label(struct inode *inode,
4720 struct nfs4_label *ilabel,
4721 struct nfs_fattr *fattr,
4722 struct nfs4_label *olabel)
4723{
4724
4725 struct iattr sattr = {0};
4726 struct nfs_server *server = NFS_SERVER(inode);
4727 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4728 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4729 .fh = NFS_FH(inode),
4730 .iap = &sattr,
4731 .server = server,
4732 .bitmask = bitmask,
4733 .label = ilabel,
4734 };
4735 struct nfs_setattrres res = {
4736 .fattr = fattr,
4737 .label = olabel,
4738 .server = server,
4739 };
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4742 .rpc_argp = &arg,
aa9c2669
DQ		 4743 .rpc_resp = &res,
4744 };
4745 int status;
4746
12207f69 4747 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4748
12207f69 4749 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4750 if (status)
4751 dprintk("%s failed: %d\n", __func__, status);
4752
4753 return status;
4754}
4755
4756static int nfs4_do_set_security_label(struct inode *inode,
4757 struct nfs4_label *ilabel,
4758 struct nfs_fattr *fattr,
4759 struct nfs4_label *olabel)
4760{
4761 struct nfs4_exception exception = { };
4762 int err;
4763
4764 do {
c1578b76
TM		 4765 err = _nfs4_do_set_security_label(inode, ilabel,
4766 fattr, olabel);
4767 trace_nfs4_set_security_label(inode, err);
4768 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4769 &exception);
4770 } while (exception.retry);
4771 return err;
4772}
4773
4774static int
4775nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4776{
4777 struct nfs4_label ilabel, *olabel = NULL;
4778 struct nfs_fattr fattr;
4779 struct rpc_cred *cred;
4780 struct inode *inode = dentry->d_inode;
4781 int status;
4782
4783 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4784 return -EOPNOTSUPP;
4785
4786 nfs_fattr_init(&fattr);
4787
4788 ilabel.pi = 0;
4789 ilabel.lfs = 0;
4790 ilabel.label = (char *)buf;
4791 ilabel.len = buflen;
4792
4793 cred = rpc_lookup_cred();
4794 if (IS_ERR(cred))
4795 return PTR_ERR(cred);
4796
4797 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4798 if (IS_ERR(olabel)) {
4799 status = -PTR_ERR(olabel);
4800 goto out;
4801 }
4802
4803 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4804 if (status == 0)
4805 nfs_setsecurity(inode, &fattr, olabel);
4806
4807 nfs4_label_free(olabel);
4808out:
4809 put_rpccred(cred);
4810 return status;
4811}
4812#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4813
4814
1da177e4 4815static int
aa5190d0 4816nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4817{
aa5190d0
TM		 4818 struct nfs_client *clp = server->nfs_client;
4819
4820 if (task->tk_status >= 0)
1da177e4
LT		 4821 return 0;
4822 switch(task->tk_status) {
a1d0b5ee 4823 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4824 case -NFS4ERR_ADMIN_REVOKED:
4825 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4826 if (state == NULL)
4827 break;
4828 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4829 case -NFS4ERR_OPENMODE:
4830 if (state == NULL)
4831 break;
5d422301 4832 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4833 goto recovery_failed;
0400a6b0 4834 goto wait_on_recovery;
0ced63d1 4835 case -NFS4ERR_EXPIRED:
5d422301
TM		 4836 if (state != NULL) {
4837 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4838 goto recovery_failed;
5d422301 4839 }
1da177e4 4840 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4841 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4842 nfs4_schedule_lease_recovery(clp);
4843 goto wait_on_recovery;
519ae255
CL		 4844 case -NFS4ERR_MOVED:
4845 if (nfs4_schedule_migration_recovery(server) < 0)
4846 goto recovery_failed;
4847 goto wait_on_recovery;
8ef2f8d4
CL		 4848 case -NFS4ERR_LEASE_MOVED:
4849 nfs4_schedule_lease_moved_recovery(clp);
4850 goto wait_on_recovery;
4745e315
AA		 4851#if defined(CONFIG_NFS_V4_1)
4852 case -NFS4ERR_BADSESSION:
4853 case -NFS4ERR_BADSLOT:
4854 case -NFS4ERR_BAD_HIGH_SLOT:
4855 case -NFS4ERR_DEADSESSION:
4856 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4857 case -NFS4ERR_SEQ_FALSE_RETRY:
4858 case -NFS4ERR_SEQ_MISORDERED:
4859 dprintk("%s ERROR %d, Reset session\n", __func__,
4860 task->tk_status);
9f594791 4861 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4862 goto wait_on_recovery;
4745e315 4863#endif /* CONFIG_NFS_V4_1 */
1da177e4 4864 case -NFS4ERR_DELAY:
aa5190d0 4865 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4866 case -NFS4ERR_GRACE:
1da177e4 4867 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4868 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4869 case -NFS4ERR_OLD_STATEID:
f1478c13 4870 goto restart_call;
1da177e4
LT		 4871 }
4872 task->tk_status = nfs4_map_errors(task->tk_status);
4873 return 0;
9f51a78e 4874recovery_failed:
5d422301
TM		 4875 task->tk_status = -EIO;
4876 return 0;
0400a6b0 4877wait_on_recovery:
a2c0b9e2 4878 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4879 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4880 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4881 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4882 goto recovery_failed;
f1478c13 4883restart_call:
a2c0b9e2
TM		 4884 task->tk_status = 0;
4885 return -EAGAIN;
1da177e4
LT		 4886}
4887
f092075d
CL		 4888static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4889 nfs4_verifier *bootverf)
cd93710e
CL		 4890{
4891 __be32 verf[2];
4892
2c820d9a
CL		 4893 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4894 /* An impossible timestamp guarantees this value
4895 * will never match a generated boot time. */
4896 verf[0] = 0;
17f26b12 4897 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4898 } else {
f092075d 4899 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4900 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4901 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4902 }
cd93710e
CL		 4903 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4904}
4905
e984a55a
CL		 4906static unsigned int
4907nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4908 char *buf, size_t len)
4909{
4910 unsigned int result;
4911
4912 rcu_read_lock();
4913 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4914 clp->cl_ipaddr,
4915 rpc_peeraddr2str(clp->cl_rpcclient,
4916 RPC_DISPLAY_ADDR),
4917 rpc_peeraddr2str(clp->cl_rpcclient,
4918 RPC_DISPLAY_PROTO));
4919 rcu_read_unlock();
4920 return result;
4921}
4922
4923static unsigned int
4924nfs4_init_uniform_client_string(const struct nfs_client *clp,
4925 char *buf, size_t len)
4926{
55b59293 4927 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4928
4929 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4930 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4931 clp->rpc_ops->version,
4932 clp->cl_minorversion,
4933 nfs4_client_id_uniquifier,
4934 nodename);
e984a55a
CL		 4935 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4936 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4937 nodename);
e984a55a
CL		 4938}
4939
706cb8db
CL		 4940/*
4941 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4942 * services. Advertise one based on the address family of the
4943 * clientaddr.
4944 */
4945static unsigned int
4946nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4947{
4948 if (strchr(clp->cl_ipaddr, ':') != NULL)
4949 return scnprintf(buf, len, "tcp6");
4950 else
4951 return scnprintf(buf, len, "tcp");
4952}
4953
f11b2a1c
JL		 4954static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4955{
4956 struct nfs4_setclientid *sc = calldata;
4957
4958 if (task->tk_status == 0)
4959 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4960}
4961
4962static const struct rpc_call_ops nfs4_setclientid_ops = {
4963 .rpc_call_done = nfs4_setclientid_done,
4964};
4965
6bbb4ae8
CL		 4966/**
4967 * nfs4_proc_setclientid - Negotiate client ID
4968 * @clp: state data structure
4969 * @program: RPC program for NFSv4 callback service
4970 * @port: IP port number for NFS4 callback service
4971 * @cred: RPC credential to use for this call
4972 * @res: where to place the result
4973 *
4974 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4975 */
bb8b27e5
TM		 4976int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4977 unsigned short port, struct rpc_cred *cred,
4978 struct nfs4_setclientid_res *res)
1da177e4
LT		 4979{
4980 nfs4_verifier sc_verifier;
4981 struct nfs4_setclientid setclientid = {
4982 .sc_verifier = &sc_verifier,
4983 .sc_prog = program,
f4eecd5d 4984 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4985 };
4986 struct rpc_message msg = {
4987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4988 .rpc_argp = &setclientid,
bb8b27e5 4989 .rpc_resp = res,
286d7d6a 4990 .rpc_cred = cred,
1da177e4 4991 };
f11b2a1c
JL		 4992 struct rpc_task *task;
4993 struct rpc_task_setup task_setup_data = {
4994 .rpc_client = clp->cl_rpcclient,
4995 .rpc_message = &msg,
4996 .callback_ops = &nfs4_setclientid_ops,
4997 .callback_data = &setclientid,
4998 .flags = RPC_TASK_TIMEOUT,
4999 };
6bbb4ae8 5000 int status;
1da177e4 5001
de734831 5002 /* nfs_client_id4 */
f092075d 5003 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5004 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5005 setclientid.sc_name_len =
5006 nfs4_init_uniform_client_string(clp,
5007 setclientid.sc_name,
5008 sizeof(setclientid.sc_name));
5009 else
5010 setclientid.sc_name_len =
5011 nfs4_init_nonuniform_client_string(clp,
5012 setclientid.sc_name,
5013 sizeof(setclientid.sc_name));
de734831 5014 /* cb_client4 */
706cb8db
CL		 5015 setclientid.sc_netid_len =
5016 nfs4_init_callback_netid(clp,
5017 setclientid.sc_netid,
5018 sizeof(setclientid.sc_netid));
de734831 5019 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5020 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5021 clp->cl_ipaddr, port >> 8, port & 255);
5022
6bbb4ae8
CL		 5023 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5024 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5025 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5026 task = rpc_run_task(&task_setup_data);
5027 if (IS_ERR(task)) {
5028 status = PTR_ERR(task);
5029 goto out;
5030 }
5031 status = task->tk_status;
5032 if (setclientid.sc_cred) {
5033 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5034 put_rpccred(setclientid.sc_cred);
5035 }
5036 rpc_put_task(task);
5037out:
c6d01c6f 5038 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5039 dprintk("NFS reply setclientid: %d\n", status);
5040 return status;
1da177e4
LT		 5041}
5042
6bbb4ae8
CL		 5043/**
5044 * nfs4_proc_setclientid_confirm - Confirm client ID
5045 * @clp: state data structure
5046 * @res: result of a previous SETCLIENTID
5047 * @cred: RPC credential to use for this call
5048 *
5049 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5050 */
fd954ae1 5051int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5052 struct nfs4_setclientid_res *arg,
5053 struct rpc_cred *cred)
1da177e4 5054{
1da177e4
LT		 5055 struct rpc_message msg = {
5056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5057 .rpc_argp = arg,
286d7d6a 5058 .rpc_cred = cred,
1da177e4 5059 };
1da177e4
LT		 5060 int status;
5061
6bbb4ae8
CL		 5062 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5063 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5064 clp->cl_clientid);
1bd714f2 5065 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5066 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5067 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5068 return status;
5069}
5070
fe650407
TM		 5071struct nfs4_delegreturndata {
5072 struct nfs4_delegreturnargs args;
fa178f29 5073 struct nfs4_delegreturnres res;
fe650407
TM		 5074 struct nfs_fh fh;
5075 nfs4_stateid stateid;
26e976a8 5076 unsigned long timestamp;
fa178f29 5077 struct nfs_fattr fattr;
fe650407 5078 int rpc_status;
039b756a
PT		 5079 struct inode *inode;
5080 bool roc;
5081 u32 roc_barrier;
fe650407
TM		 5082};
5083
fe650407
TM		 5084static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5085{
5086 struct nfs4_delegreturndata *data = calldata;
938e1010 5087
14516c3a
TM		 5088 if (!nfs4_sequence_done(task, &data->res.seq_res))
5089 return;
938e1010 5090
ca8acf8d 5091 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5092 switch (task->tk_status) {
79708861 5093 case 0:
fa178f29 5094 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5095 case -NFS4ERR_ADMIN_REVOKED:
5096 case -NFS4ERR_DELEG_REVOKED:
5097 case -NFS4ERR_BAD_STATEID:
5098 case -NFS4ERR_OLD_STATEID:
5099 case -NFS4ERR_STALE_STATEID:
5100 case -NFS4ERR_EXPIRED:
5101 task->tk_status = 0;
039b756a
PT		 5102 if (data->roc)
5103 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5104 break;
79708861
RL		 5105 default:
5106 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5107 -EAGAIN) {
d00c5d43 5108 rpc_restart_call_prepare(task);
79708861
RL		 5109 return;
5110 }
5111 }
5112 data->rpc_status = task->tk_status;
fe650407
TM		 5113}
5114
5115static void nfs4_delegreturn_release(void *calldata)
5116{
039b756a
PT		 5117 struct nfs4_delegreturndata *data = calldata;
5118
5119 if (data->roc)
5120 pnfs_roc_release(data->inode);
fe650407
TM		 5121 kfree(calldata);
5122}
5123
938e1010
AA		 5124static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5125{
5126 struct nfs4_delegreturndata *d_data;
5127
5128 d_data = (struct nfs4_delegreturndata *)data;
5129
039b756a
PT		 5130 if (d_data->roc &&
5131 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5132 return;
5133
d9afbd1b
TM		 5134 nfs4_setup_sequence(d_data->res.server,
5135 &d_data->args.seq_args,
5136 &d_data->res.seq_res,
5137 task);
938e1010 5138}
938e1010 5139
c8d149f3 5140static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5141 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5142 .rpc_call_done = nfs4_delegreturn_done,
5143 .rpc_release = nfs4_delegreturn_release,
5144};
5145
e6f81075 5146static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5147{
5148 struct nfs4_delegreturndata *data;
fa178f29 5149 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5150 struct rpc_task *task;
5138fde0
TM		 5151 struct rpc_message msg = {
5152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5153 .rpc_cred = cred,
5154 };
c970aa85
TM		 5155 struct rpc_task_setup task_setup_data = {
5156 .rpc_client = server->client,
5138fde0 5157 .rpc_message = &msg,
c970aa85
TM		 5158 .callback_ops = &nfs4_delegreturn_ops,
5159 .flags = RPC_TASK_ASYNC,
5160 };
e6f81075 5161 int status = 0;
fe650407 5162
8535b2be 5163 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5164 if (data == NULL)
5165 return -ENOMEM;
a9c92d6b 5166 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5167 data->args.fhandle = &data->fh;
5168 data->args.stateid = &data->stateid;
9e907fec 5169 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5170 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5171 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5172 data->res.fattr = &data->fattr;
5173 data->res.server = server;
5138fde0 5174 nfs_fattr_init(data->res.fattr);
26e976a8 5175 data->timestamp = jiffies;
fe650407 5176 data->rpc_status = 0;
039b756a
PT		 5177 data->inode = inode;
5178 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5179 pnfs_roc(inode) : false;
fe650407 5180
c970aa85 5181 task_setup_data.callback_data = data;
1174dd1f
TM		 5182 msg.rpc_argp = &data->args;
5183 msg.rpc_resp = &data->res;
c970aa85 5184 task = rpc_run_task(&task_setup_data);
7a1218a2 5185 if (IS_ERR(task))
fe650407 5186 return PTR_ERR(task);
e6f81075
TM		 5187 if (!issync)
5188 goto out;
fe650407 5189 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5190 if (status != 0)
5191 goto out;
5192 status = data->rpc_status;
e144cbcc
TM		 5193 if (status == 0)
5194 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5195 else
5196 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5197out:
e6b3c4db 5198 rpc_put_task(task);
fe650407 5199 return status;
1da177e4
LT		 5200}
5201
e6f81075 5202int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5203{
5204 struct nfs_server *server = NFS_SERVER(inode);
5205 struct nfs4_exception exception = { };
5206 int err;
5207 do {
e6f81075 5208 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5209 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5210 switch (err) {
5211 case -NFS4ERR_STALE_STATEID:
5212 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5213 case 0:
5214 return 0;
5215 }
5216 err = nfs4_handle_exception(server, err, &exception);
5217 } while (exception.retry);
5218 return err;
5219}
5220
5221#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5222#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5223
5224/*
5225 * sleep, with exponential backoff, and retry the LOCK operation.
5226 */
5227static unsigned long
5228nfs4_set_lock_task_retry(unsigned long timeout)
5229{
416ad3c9 5230 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5231 timeout <<= 1;
5232 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5233 return NFS4_LOCK_MAXTIMEOUT;
5234 return timeout;
5235}
5236
1da177e4
LT		 5237static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5238{
5239 struct inode *inode = state->inode;
5240 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5241 struct nfs_client *clp = server->nfs_client;
911d1aaf 5242 struct nfs_lockt_args arg = {
1da177e4 5243 .fh = NFS_FH(inode),
911d1aaf 5244 .fl = request,
1da177e4 5245 };
911d1aaf
TM		 5246 struct nfs_lockt_res res = {
5247 .denied = request,
1da177e4
LT		 5248 };
5249 struct rpc_message msg = {
5250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5251 .rpc_argp = &arg,
5252 .rpc_resp = &res,
5253 .rpc_cred = state->owner->so_cred,
5254 };
1da177e4
LT		 5255 struct nfs4_lock_state *lsp;
5256 int status;
5257
911d1aaf 5258 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5259 status = nfs4_set_lock_state(state, request);
5260 if (status != 0)
5261 goto out;
5262 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5263 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5264 arg.lock_owner.s_dev = server->s_dev;
7c513058 5265 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5266 switch (status) {
5267 case 0:
5268 request->fl_type = F_UNLCK;
5269 break;
5270 case -NFS4ERR_DENIED:
5271 status = 0;
1da177e4 5272 }
70cc6487 5273 request->fl_ops->fl_release_private(request);
a6f951dd 5274 request->fl_ops = NULL;
8d0a8a9d 5275out:
1da177e4
LT		 5276 return status;
5277}
5278
5279static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5280{
5281 struct nfs4_exception exception = { };
5282 int err;
5283
5284 do {
d1b748a5
TM		 5285 err = _nfs4_proc_getlk(state, cmd, request);
5286 trace_nfs4_get_lock(request, state, cmd, err);
5287 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5288 &exception);
5289 } while (exception.retry);
5290 return err;
5291}
5292
5293static int do_vfs_lock(struct file *file, struct file_lock *fl)
5294{
5295 int res = 0;
5296 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5297 case FL_POSIX:
5298 res = posix_lock_file_wait(file, fl);
5299 break;
5300 case FL_FLOCK:
5301 res = flock_lock_file_wait(file, fl);
5302 break;
5303 default:
5304 BUG();
5305 }
1da177e4
LT		 5306 return res;
5307}
5308
faf5f49c 5309struct nfs4_unlockdata {
911d1aaf
TM		 5310 struct nfs_locku_args arg;
5311 struct nfs_locku_res res;
faf5f49c
TM		 5312 struct nfs4_lock_state *lsp;
5313 struct nfs_open_context *ctx;
911d1aaf
TM		 5314 struct file_lock fl;
5315 const struct nfs_server *server;
26e976a8 5316 unsigned long timestamp;
faf5f49c
TM		 5317};
5318
911d1aaf
TM		 5319static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5320 struct nfs_open_context *ctx,
5321 struct nfs4_lock_state *lsp,
5322 struct nfs_seqid *seqid)
5323{
5324 struct nfs4_unlockdata *p;
5325 struct inode *inode = lsp->ls_state->inode;
5326
8535b2be 5327 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5328 if (p == NULL)
5329 return NULL;
5330 p->arg.fh = NFS_FH(inode);
5331 p->arg.fl = &p->fl;
5332 p->arg.seqid = seqid;
c1d51931 5333 p->res.seqid = seqid;
911d1aaf
TM		 5334 p->arg.stateid = &lsp->ls_stateid;
5335 p->lsp = lsp;
5336 atomic_inc(&lsp->ls_count);
5337 /* Ensure we don't close file until we're done freeing locks! */
5338 p->ctx = get_nfs_open_context(ctx);
5339 memcpy(&p->fl, fl, sizeof(p->fl));
5340 p->server = NFS_SERVER(inode);
5341 return p;
5342}
5343
06f814a3 5344static void nfs4_locku_release_calldata(void *data)
faf5f49c 5345{
963d8fe5 5346 struct nfs4_unlockdata *calldata = data;
911d1aaf 5347 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5348 nfs4_put_lock_state(calldata->lsp);
5349 put_nfs_open_context(calldata->ctx);
5350 kfree(calldata);
faf5f49c
TM		 5351}
5352
963d8fe5 5353static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5354{
963d8fe5 5355 struct nfs4_unlockdata *calldata = data;
faf5f49c 5356
14516c3a
TM		 5357 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5358 return;
faf5f49c
TM		 5359 switch (task->tk_status) {
5360 case 0:
f597c537
TM		 5361 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5362 &calldata->res.stateid);
26e976a8 5363 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5364 break;
9e33bed5
TM		 5365 case -NFS4ERR_BAD_STATEID:
5366 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5367 case -NFS4ERR_STALE_STATEID:
5368 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5369 break;
5370 default:
9e33bed5 5371 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5372 rpc_restart_call_prepare(task);
faf5f49c 5373 }
2b1bc308 5374 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5375}
5376
4ce70ada 5377static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5378{
4ce70ada 5379 struct nfs4_unlockdata *calldata = data;
faf5f49c 5380
911d1aaf 5381 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5382 goto out_wait;
795a88c9 5383 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5384 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5385 goto out_no_action;
faf5f49c 5386 }
26e976a8 5387 calldata->timestamp = jiffies;
035168ab 5388 if (nfs4_setup_sequence(calldata->server,
a893693c 5389 &calldata->arg.seq_args,
2240a9e2
TM		 5390 &calldata->res.seq_res,
5391 task) != 0)
5392 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5393 return;
5394out_no_action:
5395 task->tk_action = NULL;
5396out_wait:
5397 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5398}
5399
963d8fe5 5400static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5401 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5402 .rpc_call_done = nfs4_locku_done,
06f814a3 5403 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5404};
5405
a5d16a4d
TM		 5406static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5407 struct nfs_open_context *ctx,
5408 struct nfs4_lock_state *lsp,
5409 struct nfs_seqid *seqid)
5410{
5411 struct nfs4_unlockdata *data;
5138fde0
TM		 5412 struct rpc_message msg = {
5413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5414 .rpc_cred = ctx->cred,
5415 };
c970aa85
TM		 5416 struct rpc_task_setup task_setup_data = {
5417 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5418 .rpc_message = &msg,
c970aa85 5419 .callback_ops = &nfs4_locku_ops,
101070ca 5420 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5421 .flags = RPC_TASK_ASYNC,
5422 };
a5d16a4d 5423
fa940720
WAA		 5424 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5425 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5426
137d6aca
FF		 5427 /* Ensure this is an unlock - when canceling a lock, the
5428 * canceled lock is passed in, and it won't be an unlock.
5429 */
5430 fl->fl_type = F_UNLCK;
5431
a5d16a4d
TM		 5432 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5433 if (data == NULL) {
5434 nfs_free_seqid(seqid);
5435 return ERR_PTR(-ENOMEM);
5436 }
5437
a9c92d6b 5438 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5439 msg.rpc_argp = &data->arg;
5440 msg.rpc_resp = &data->res;
c970aa85
TM		 5441 task_setup_data.callback_data = data;
5442 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5443}
5444
faf5f49c
TM		 5445static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5446{
65b62a29
TM		 5447 struct inode *inode = state->inode;
5448 struct nfs4_state_owner *sp = state->owner;
5449 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5450 struct nfs_seqid *seqid;
1da177e4 5451 struct nfs4_lock_state *lsp;
06f814a3
TM		 5452 struct rpc_task *task;
5453 int status = 0;
536ff0f8 5454 unsigned char fl_flags = request->fl_flags;
faf5f49c 5455
8d0a8a9d 5456 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5457 /* Unlock _before_ we do the RPC call */
5458 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5459 /* Exclude nfs_delegation_claim_locks() */
5460 mutex_lock(&sp->so_delegreturn_mutex);
5461 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5462 down_read(&nfsi->rwsem);
5463 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5464 up_read(&nfsi->rwsem);
65b62a29 5465 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5466 goto out;
19e03c57
TM		 5467 }
5468 up_read(&nfsi->rwsem);
65b62a29 5469 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5470 if (status != 0)
9b073574
TM		 5471 goto out;
5472 /* Is this a delegated lock? */
8d0a8a9d 5473 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5474 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5475 goto out;
8535b2be 5476 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5477 status = -ENOMEM;
911d1aaf 5478 if (seqid == NULL)
9b073574 5479 goto out;
cd3758e3 5480 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5481 status = PTR_ERR(task);
5482 if (IS_ERR(task))
9b073574 5483 goto out;
a5d16a4d 5484 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5485 rpc_put_task(task);
9b073574 5486out:
536ff0f8 5487 request->fl_flags = fl_flags;
d1b748a5 5488 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5489 return status;
5490}
5491
a5d16a4d
TM		 5492struct nfs4_lockdata {
5493 struct nfs_lock_args arg;
5494 struct nfs_lock_res res;
5495 struct nfs4_lock_state *lsp;
5496 struct nfs_open_context *ctx;
5497 struct file_lock fl;
26e976a8 5498 unsigned long timestamp;
a5d16a4d
TM		 5499 int rpc_status;
5500 int cancelled;
66179efe 5501 struct nfs_server *server;
a5d16a4d
TM		 5502};
5503
5504static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5505 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5506 gfp_t gfp_mask)
1da177e4 5507{
a5d16a4d
TM		 5508 struct nfs4_lockdata *p;
5509 struct inode *inode = lsp->ls_state->inode;
1da177e4 5510 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5511
8535b2be 5512 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5513 if (p == NULL)
5514 return NULL;
5515
5516 p->arg.fh = NFS_FH(inode);
5517 p->arg.fl = &p->fl;
8535b2be 5518 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5519 if (p->arg.open_seqid == NULL)
5520 goto out_free;
8535b2be 5521 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5522 if (p->arg.lock_seqid == NULL)
2f74c0a0 5523 goto out_free_seqid;
a5d16a4d 5524 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5525 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5526 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5527 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5528 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5529 p->lsp = lsp;
66179efe 5530 p->server = server;
a5d16a4d
TM		 5531 atomic_inc(&lsp->ls_count);
5532 p->ctx = get_nfs_open_context(ctx);
5533 memcpy(&p->fl, fl, sizeof(p->fl));
5534 return p;
2f74c0a0
TM		 5535out_free_seqid:
5536 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5537out_free:
5538 kfree(p);
5539 return NULL;
5540}
5541
5542static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5543{
5544 struct nfs4_lockdata *data = calldata;
5545 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5546
3110ff80 5547 dprintk("%s: begin!\n", __func__);
2f74c0a0 5548 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5549 goto out_wait;
a5d16a4d
TM		 5550 /* Do we need to do an open_to_lock_owner? */
5551 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5552 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5553 goto out_release_lock_seqid;
8fe72bac 5554 }
8e472f33 5555 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5556 data->arg.new_lock_owner = 1;
c1d51931 5557 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5558 } else
5559 data->arg.new_lock_owner = 0;
5d422301
TM		 5560 if (!nfs4_valid_open_stateid(state)) {
5561 data->rpc_status = -EBADF;
5562 task->tk_action = NULL;
5563 goto out_release_open_seqid;
5564 }
26e976a8 5565 data->timestamp = jiffies;
035168ab
TM		 5566 if (nfs4_setup_sequence(data->server,
5567 &data->arg.seq_args,
2240a9e2 5568 &data->res.seq_res,
d9afbd1b 5569 task) == 0)
66179efe 5570 return;
5d422301 5571out_release_open_seqid:
2240a9e2
TM		 5572 nfs_release_seqid(data->arg.open_seqid);
5573out_release_lock_seqid:
5574 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5575out_wait:
5576 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5577 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5578}
5579
a5d16a4d
TM		 5580static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5581{
5582 struct nfs4_lockdata *data = calldata;
5583
3110ff80 5584 dprintk("%s: begin!\n", __func__);
a5d16a4d 5585
14516c3a
TM		 5586 if (!nfs4_sequence_done(task, &data->res.seq_res))
5587 return;
66179efe 5588
a5d16a4d 5589 data->rpc_status = task->tk_status;
a5d16a4d 5590 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5591 if (data->rpc_status == 0)
5592 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5593 else
5594 goto out;
5595 }
5596 if (data->rpc_status == 0) {
f597c537 5597 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5598 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5599 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5600 }
a5d16a4d 5601out:
3110ff80 5602 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5603}
5604
5605static void nfs4_lock_release(void *calldata)
5606{
5607 struct nfs4_lockdata *data = calldata;
5608
3110ff80 5609 dprintk("%s: begin!\n", __func__);
2f74c0a0 5610 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5611 if (data->cancelled != 0) {
5612 struct rpc_task *task;
5613 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5614 data->arg.lock_seqid);
5615 if (!IS_ERR(task))
bf294b41 5616 rpc_put_task_async(task);
3110ff80 5617 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5618 } else
5619 nfs_free_seqid(data->arg.lock_seqid);
5620 nfs4_put_lock_state(data->lsp);
5621 put_nfs_open_context(data->ctx);
5622 kfree(data);
3110ff80 5623 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5624}
5625
5626static const struct rpc_call_ops nfs4_lock_ops = {
5627 .rpc_call_prepare = nfs4_lock_prepare,
5628 .rpc_call_done = nfs4_lock_done,
5629 .rpc_release = nfs4_lock_release,
5630};
5631
2bee72a6
TM		 5632static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5633{
2bee72a6
TM		 5634 switch (error) {
5635 case -NFS4ERR_ADMIN_REVOKED:
5636 case -NFS4ERR_BAD_STATEID:
ecac799a 5637 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5638 if (new_lock_owner != 0 ||
795a88c9 5639 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5640 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5641 break;
5642 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5643 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5644 case -NFS4ERR_EXPIRED:
5645 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5646 };
5647}
5648
afe6c27c 5649static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5650{
5651 struct nfs4_lockdata *data;
5652 struct rpc_task *task;
5138fde0
TM		 5653 struct rpc_message msg = {
5654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5655 .rpc_cred = state->owner->so_cred,
5656 };
c970aa85
TM		 5657 struct rpc_task_setup task_setup_data = {
5658 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5659 .rpc_message = &msg,
c970aa85 5660 .callback_ops = &nfs4_lock_ops,
101070ca 5661 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5662 .flags = RPC_TASK_ASYNC,
5663 };
a5d16a4d
TM		 5664 int ret;
5665
3110ff80 5666 dprintk("%s: begin!\n", __func__);
cd3758e3 5667 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5668 fl->fl_u.nfs4_fl.owner,
5669 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5670 if (data == NULL)
5671 return -ENOMEM;
5672 if (IS_SETLKW(cmd))
5673 data->arg.block = 1;
a9c92d6b 5674 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5675 msg.rpc_argp = &data->arg;
5676 msg.rpc_resp = &data->res;
c970aa85 5677 task_setup_data.callback_data = data;
8fe72bac
TM		 5678 if (recovery_type > NFS_LOCK_NEW) {
5679 if (recovery_type == NFS_LOCK_RECLAIM)
5680 data->arg.reclaim = NFS_LOCK_RECLAIM;
5681 nfs4_set_sequence_privileged(&data->arg.seq_args);
5682 }
c970aa85 5683 task = rpc_run_task(&task_setup_data);
7a1218a2 5684 if (IS_ERR(task))
a5d16a4d 5685 return PTR_ERR(task);
a5d16a4d
TM		 5686 ret = nfs4_wait_for_completion_rpc_task(task);
5687 if (ret == 0) {
5688 ret = data->rpc_status;
2bee72a6
TM		 5689 if (ret)
5690 nfs4_handle_setlk_error(data->server, data->lsp,
5691 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5692 } else
5693 data->cancelled = 1;
e6b3c4db 5694 rpc_put_task(task);
3110ff80 5695 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5696 return ret;
1da177e4
LT		 5697}
5698
5699static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5700{
202b50dc 5701 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5702 struct nfs4_exception exception = {
5703 .inode = state->inode,
5704 };
202b50dc
TM		 5705 int err;
5706
5707 do {
42a2d13e
TM		 5708 /* Cache the lock if possible... */
5709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5710 return 0;
afe6c27c 5711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5712 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5713 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5714 break;
5715 nfs4_handle_exception(server, err, &exception);
5716 } while (exception.retry);
5717 return err;
1da177e4
LT		 5718}
5719
5720static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5721{
202b50dc 5722 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5723 struct nfs4_exception exception = {
5724 .inode = state->inode,
5725 };
202b50dc
TM		 5726 int err;
5727
6bfc93ef
TM		 5728 err = nfs4_set_lock_state(state, request);
5729 if (err != 0)
5730 return err;
f6de7a39 5731 if (!recover_lost_locks) {
ef1820f9
N		 5732 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5733 return 0;
5734 }
202b50dc 5735 do {
42a2d13e
TM		 5736 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5737 return 0;
afe6c27c 5738 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5739 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5740 switch (err) {
5741 default:
5742 goto out;
5743 case -NFS4ERR_GRACE:
5744 case -NFS4ERR_DELAY:
5745 nfs4_handle_exception(server, err, &exception);
5746 err = 0;
5747 }
202b50dc 5748 } while (exception.retry);
a9ed2e25 5749out:
202b50dc 5750 return err;
1da177e4
LT		 5751}
5752
f062eb6c 5753#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5754/**
5755 * nfs41_check_expired_locks - possibly free a lock stateid
5756 *
5757 * @state: NFSv4 state for an inode
5758 *
5759 * Returns NFS_OK if recovery for this stateid is now finished.
5760 * Otherwise a negative NFS4ERR value is returned.
5761 */
b01dd1d8 5762static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5763{
eb64cf96 5764 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5765 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5766 struct nfs_server *server = NFS_SERVER(state->inode);
5767
b01dd1d8 5768 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5769 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5770 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5771
5772 status = nfs41_test_stateid(server,
5773 &lsp->ls_stateid,
5774 cred);
08cb47fa 5775 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5776 if (status != NFS_OK) {
3e60ffdd
CL		 5777 /* Free the stateid unless the server
5778 * informs us the stateid is unrecognized. */
89af2739
CL		 5779 if (status != -NFS4ERR_BAD_STATEID)
5780 nfs41_free_stateid(server,
ab7cb0df
TM		 5781 &lsp->ls_stateid,
5782 cred);
795a88c9 5783 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5784 ret = status;
5785 }
5786 }
5787 };
5788
5789 return ret;
5790}
5791
5792static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5793{
5794 int status = NFS_OK;
5795
5796 if (test_bit(LK_STATE_IN_USE, &state->flags))
5797 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5798 if (status != NFS_OK)
5799 status = nfs4_lock_expired(state, request);
5800 return status;
f062eb6c
BS		 5801}
5802#endif
5803
1da177e4
LT		 5804static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5805{
9a99af49 5806 struct nfs4_state_owner *sp = state->owner;
19e03c57 5807 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5808 unsigned char fl_flags = request->fl_flags;
9a99af49 5809 unsigned int seq;
8e469ebd 5810 int status = -ENOLCK;
1da177e4 5811
8e469ebd
TM		 5812 if ((fl_flags & FL_POSIX) &&
5813 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5814 goto out;
6bfc93ef 5815 /* Is this a delegated open? */
6bfc93ef
TM		 5816 status = nfs4_set_lock_state(state, request);
5817 if (status != 0)
5818 goto out;
01c3b861
TM		 5819 request->fl_flags |= FL_ACCESS;
5820 status = do_vfs_lock(request->fl_file, request);
5821 if (status < 0)
5822 goto out;
19e03c57 5823 down_read(&nfsi->rwsem);
01c3b861 5824 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5825 /* Yes: cache locks! */
01c3b861 5826 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5827 request->fl_flags = fl_flags & ~FL_SLEEP;
5828 status = do_vfs_lock(request->fl_file, request);
5829 goto out_unlock;
01c3b861 5830 }
9a99af49
TM		 5831 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5832 up_read(&nfsi->rwsem);
afe6c27c 5833 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5834 if (status != 0)
9a99af49
TM		 5835 goto out;
5836 down_read(&nfsi->rwsem);
5837 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5838 status = -NFS4ERR_DELAY;
01c3b861 5839 goto out_unlock;
9a99af49 5840 }
6bfc93ef 5841 /* Note: we always want to sleep here! */
01c3b861 5842 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5843 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5844 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5845 "manager!\n", __func__);
01c3b861 5846out_unlock:
19e03c57 5847 up_read(&nfsi->rwsem);
01c3b861
TM		 5848out:
5849 request->fl_flags = fl_flags;
1da177e4
LT		 5850 return status;
5851}
5852
5853static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5854{
a1d0b5ee
TM		 5855 struct nfs4_exception exception = {
5856 .state = state,
05ffe24f 5857 .inode = state->inode,
a1d0b5ee 5858 };
1da177e4
LT		 5859 int err;
5860
5861 do {
965b5d67 5862 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5863 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5864 if (err == -NFS4ERR_DENIED)
5865 err = -EAGAIN;
1da177e4 5866 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5867 err, &exception);
1da177e4
LT		 5868 } while (exception.retry);
5869 return err;
5870}
5871
5872static int
5873nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5874{
5875 struct nfs_open_context *ctx;
5876 struct nfs4_state *state;
5877 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5878 int status;
5879
5880 /* verify open state */
cd3758e3 5881 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5882 state = ctx->state;
5883
5884 if (request->fl_start < 0 || request->fl_end < 0)
5885 return -EINVAL;
5886
d953126a
TM		 5887 if (IS_GETLK(cmd)) {
5888 if (state != NULL)
5889 return nfs4_proc_getlk(state, F_GETLK, request);
5890 return 0;
5891 }
1da177e4
LT		 5892
5893 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5894 return -EINVAL;
5895
d953126a
TM		 5896 if (request->fl_type == F_UNLCK) {
5897 if (state != NULL)
5898 return nfs4_proc_unlck(state, cmd, request);
5899 return 0;
5900 }
1da177e4 5901
d953126a
TM		 5902 if (state == NULL)
5903 return -ENOLCK;
55725513
TM		 5904 /*
5905 * Don't rely on the VFS having checked the file open mode,
5906 * since it won't do this for flock() locks.
5907 */
f44106e2 5908 switch (request->fl_type) {
55725513
TM		 5909 case F_RDLCK:
5910 if (!(filp->f_mode & FMODE_READ))
5911 return -EBADF;
5912 break;
5913 case F_WRLCK:
5914 if (!(filp->f_mode & FMODE_WRITE))
5915 return -EBADF;
5916 }
5917
1da177e4
LT		 5918 do {
5919 status = nfs4_proc_setlk(state, cmd, request);
5920 if ((status != -EAGAIN) || IS_SETLK(cmd))
5921 break;
5922 timeout = nfs4_set_lock_task_retry(timeout);
5923 status = -ERESTARTSYS;
5924 if (signalled())
5925 break;
5926 } while(status < 0);
1da177e4
LT		 5927 return status;
5928}
5929
db4f2e63 5930int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5931{
5932 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5933 int err;
5934
5935 err = nfs4_set_lock_state(state, fl);
5936 if (err != 0)
db4f2e63 5937 return err;
4a706fa0 5938 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5939 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5940}
6b3b5496 5941
cf470c3e
TM		 5942struct nfs_release_lockowner_data {
5943 struct nfs4_lock_state *lsp;
5ae67c4f 5944 struct nfs_server *server;
cf470c3e 5945 struct nfs_release_lockowner_args args;
b7e63a10 5946 struct nfs_release_lockowner_res res;
60ea6812 5947 unsigned long timestamp;
cf470c3e
TM		 5948};
5949
fbd4bfd1
CL		 5950static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5951{
5952 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5953 struct nfs_server *server = data->server;
5954 nfs40_setup_sequence(server, &data->args.seq_args,
5955 &data->res.seq_res, task);
5956 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5957 data->timestamp = jiffies;
fbd4bfd1
CL		 5958}
5959
5960static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5961{
5962 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5963 struct nfs_server *server = data->server;
5964
b7e63a10 5965 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5966
5967 switch (task->tk_status) {
5968 case 0:
5969 renew_lease(server, data->timestamp);
5970 break;
5971 case -NFS4ERR_STALE_CLIENTID:
5972 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5973 nfs4_schedule_lease_recovery(server->nfs_client);
5974 break;
60ea6812
CL		 5975 case -NFS4ERR_LEASE_MOVED:
5976 case -NFS4ERR_DELAY:
5977 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5978 rpc_restart_call_prepare(task);
5979 }
fbd4bfd1
CL		 5980}
5981
d3c7b7cc
TM		 5982static void nfs4_release_lockowner_release(void *calldata)
5983{
cf470c3e 5984 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5985 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5986 kfree(calldata);
5987}
5988
17280175 5989static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5990 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5991 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5992 .rpc_release = nfs4_release_lockowner_release,
5993};
5994
f1cdae87
JL		 5995static void
5996nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5997{
cf470c3e 5998 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6001 };
6002
6003 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6004 return;
fbd4bfd1 6005
cf470c3e
TM		 6006 data = kmalloc(sizeof(*data), GFP_NOFS);
6007 if (!data)
f1cdae87 6008 return;
cf470c3e 6009 data->lsp = lsp;
5ae67c4f 6010 data->server = server;
cf470c3e
TM		 6011 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6012 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6013 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6014
cf470c3e 6015 msg.rpc_argp = &data->args;
b7e63a10
TM		 6016 msg.rpc_resp = &data->res;
6017 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6018 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6019}
6020
aa1870af
BF		 6021#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6022
64c2ce8b
AK		 6023static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6024 const void *buf, size_t buflen,
6025 int flags, int type)
6b3b5496 6026{
64c2ce8b
AK		 6027 if (strcmp(key, "") != 0)
6028 return -EINVAL;
4b580ee3 6029
64c2ce8b 6030 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6031}
6032
64c2ce8b
AK		 6033static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6034 void *buf, size_t buflen, int type)
6b3b5496 6035{
64c2ce8b
AK		 6036 if (strcmp(key, "") != 0)
6037 return -EINVAL;
aa1870af 6038
64c2ce8b 6039 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6040}
6041
64c2ce8b
AK		 6042static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6043 size_t list_len, const char *name,
6044 size_t name_len, int type)
6b3b5496 6045{
64c2ce8b 6046 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6047
096455a2
BF		 6048 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6049 return 0;
64c2ce8b
AK		 6050
6051 if (list && len <= list_len)
6052 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6053 return len;
6b3b5496
BF		 6054}
6055
c9bccef6
DQ		 6056#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6057static inline int nfs4_server_supports_labels(struct nfs_server *server)
6058{
6059 return server->caps & NFS_CAP_SECURITY_LABEL;
6060}
6061
6062static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6063 const void *buf, size_t buflen,
6064 int flags, int type)
6065{
6066 if (security_ismaclabel(key))
6067 return nfs4_set_security_label(dentry, buf, buflen);
6068
6069 return -EOPNOTSUPP;
6070}
6071
6072static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6073 void *buf, size_t buflen, int type)
6074{
6075 if (security_ismaclabel(key))
6076 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6077 return -EOPNOTSUPP;
6078}
6079
6080static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6081 size_t list_len, const char *name,
6082 size_t name_len, int type)
6083{
6084 size_t len = 0;
6085
6086 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6087 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6088 if (list && len <= list_len)
6089 security_inode_listsecurity(dentry->d_inode, list, len);
6090 }
6091 return len;
6092}
6093
6094static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6095 .prefix = XATTR_SECURITY_PREFIX,
6096 .list = nfs4_xattr_list_nfs4_label,
6097 .get = nfs4_xattr_get_nfs4_label,
6098 .set = nfs4_xattr_set_nfs4_label,
6099};
6100#endif
6101
6102
533eb461
AA		 6103/*
6104 * nfs_fhget will use either the mounted_on_fileid or the fileid
6105 */
69aaaae1
TM		 6106static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6107{
533eb461
AA		 6108 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6109 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6110 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6111 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6112 return;
6113
6114 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6115 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6116 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6117 fattr->nlink = 2;
6118}
6119
f05d147f
BS		 6120static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6121 const struct qstr *name,
6122 struct nfs4_fs_locations *fs_locations,
6123 struct page *page)
683b57b4
TM		 6124{
6125 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6126 u32 bitmask[3] = {
361e624f 6127 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6128 };
6129 struct nfs4_fs_locations_arg args = {
6130 .dir_fh = NFS_FH(dir),
c228fd3a 6131 .name = name,
683b57b4
TM		 6132 .page = page,
6133 .bitmask = bitmask,
6134 };
22958463
BH		 6135 struct nfs4_fs_locations_res res = {
6136 .fs_locations = fs_locations,
6137 };
683b57b4
TM		 6138 struct rpc_message msg = {
6139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6140 .rpc_argp = &args,
22958463 6141 .rpc_resp = &res,
683b57b4
TM		 6142 };
6143 int status;
6144
3110ff80 6145 dprintk("%s: start\n", __func__);
533eb461
AA		 6146
6147 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6148 * is not supported */
6149 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6150 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6151 else
6152 bitmask[0] |= FATTR4_WORD0_FILEID;
6153
c228fd3a 6154 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6155 fs_locations->server = server;
830b8e33 6156 fs_locations->nlocations = 0;
f05d147f 6157 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6158 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6159 return status;
6160}
6161
f05d147f
BS		 6162int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6163 const struct qstr *name,
6164 struct nfs4_fs_locations *fs_locations,
6165 struct page *page)
db0a9593
BS		 6166{
6167 struct nfs4_exception exception = { };
6168 int err;
6169 do {
078ea3df
TM		 6170 err = _nfs4_proc_fs_locations(client, dir, name,
6171 fs_locations, page);
6172 trace_nfs4_get_fs_locations(dir, name, err);
6173 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6174 &exception);
6175 } while (exception.retry);
6176 return err;
6177}
6178
b03d735b
CL		 6179/*
6180 * This operation also signals the server that this client is
6181 * performing migration recovery. The server can stop returning
6182 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6183 * appended to this compound to identify the client ID which is
6184 * performing recovery.
6185 */
6186static int _nfs40_proc_get_locations(struct inode *inode,
6187 struct nfs4_fs_locations *locations,
6188 struct page *page, struct rpc_cred *cred)
6189{
6190 struct nfs_server *server = NFS_SERVER(inode);
6191 struct rpc_clnt *clnt = server->client;
6192 u32 bitmask[2] = {
6193 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6194 };
6195 struct nfs4_fs_locations_arg args = {
6196 .clientid = server->nfs_client->cl_clientid,
6197 .fh = NFS_FH(inode),
6198 .page = page,
6199 .bitmask = bitmask,
6200 .migration = 1, /* skip LOOKUP */
6201 .renew = 1, /* append RENEW */
6202 };
6203 struct nfs4_fs_locations_res res = {
6204 .fs_locations = locations,
6205 .migration = 1,
6206 .renew = 1,
6207 };
6208 struct rpc_message msg = {
6209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6210 .rpc_argp = &args,
6211 .rpc_resp = &res,
6212 .rpc_cred = cred,
6213 };
6214 unsigned long now = jiffies;
6215 int status;
6216
6217 nfs_fattr_init(&locations->fattr);
6218 locations->server = server;
6219 locations->nlocations = 0;
6220
6221 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6222 nfs4_set_sequence_privileged(&args.seq_args);
6223 status = nfs4_call_sync_sequence(clnt, server, &msg,
6224 &args.seq_args, &res.seq_res);
6225 if (status)
6226 return status;
6227
6228 renew_lease(server, now);
6229 return 0;
6230}
6231
6232#ifdef CONFIG_NFS_V4_1
6233
6234/*
6235 * This operation also signals the server that this client is
6236 * performing migration recovery. The server can stop asserting
6237 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6238 * performing this operation is identified in the SEQUENCE
6239 * operation in this compound.
6240 *
6241 * When the client supports GETATTR(fs_locations_info), it can
6242 * be plumbed in here.
6243 */
6244static int _nfs41_proc_get_locations(struct inode *inode,
6245 struct nfs4_fs_locations *locations,
6246 struct page *page, struct rpc_cred *cred)
6247{
6248 struct nfs_server *server = NFS_SERVER(inode);
6249 struct rpc_clnt *clnt = server->client;
6250 u32 bitmask[2] = {
6251 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6252 };
6253 struct nfs4_fs_locations_arg args = {
6254 .fh = NFS_FH(inode),
6255 .page = page,
6256 .bitmask = bitmask,
6257 .migration = 1, /* skip LOOKUP */
6258 };
6259 struct nfs4_fs_locations_res res = {
6260 .fs_locations = locations,
6261 .migration = 1,
6262 };
6263 struct rpc_message msg = {
6264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6265 .rpc_argp = &args,
6266 .rpc_resp = &res,
6267 .rpc_cred = cred,
6268 };
6269 int status;
6270
6271 nfs_fattr_init(&locations->fattr);
6272 locations->server = server;
6273 locations->nlocations = 0;
6274
6275 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6276 nfs4_set_sequence_privileged(&args.seq_args);
6277 status = nfs4_call_sync_sequence(clnt, server, &msg,
6278 &args.seq_args, &res.seq_res);
6279 if (status == NFS4_OK &&
6280 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6281 status = -NFS4ERR_LEASE_MOVED;
6282 return status;
6283}
6284
6285#endif /* CONFIG_NFS_V4_1 */
6286
6287/**
6288 * nfs4_proc_get_locations - discover locations for a migrated FSID
6289 * @inode: inode on FSID that is migrating
6290 * @locations: result of query
6291 * @page: buffer
6292 * @cred: credential to use for this operation
6293 *
6294 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6295 * operation failed, or a negative errno if a local error occurred.
6296 *
6297 * On success, "locations" is filled in, but if the server has
6298 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6299 * asserted.
6300 *
6301 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6302 * from this client that require migration recovery.
6303 */
6304int nfs4_proc_get_locations(struct inode *inode,
6305 struct nfs4_fs_locations *locations,
6306 struct page *page, struct rpc_cred *cred)
6307{
6308 struct nfs_server *server = NFS_SERVER(inode);
6309 struct nfs_client *clp = server->nfs_client;
6310 const struct nfs4_mig_recovery_ops *ops =
6311 clp->cl_mvops->mig_recovery_ops;
6312 struct nfs4_exception exception = { };
6313 int status;
6314
6315 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6316 (unsigned long long)server->fsid.major,
6317 (unsigned long long)server->fsid.minor,
6318 clp->cl_hostname);
6319 nfs_display_fhandle(NFS_FH(inode), __func__);
6320
6321 do {
6322 status = ops->get_locations(inode, locations, page, cred);
6323 if (status != -NFS4ERR_DELAY)
6324 break;
6325 nfs4_handle_exception(server, status, &exception);
6326 } while (exception.retry);
6327 return status;
6328}
6329
44c99933
CL		 6330/*
6331 * This operation also signals the server that this client is
6332 * performing "lease moved" recovery. The server can stop
6333 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6334 * is appended to this compound to identify the client ID which is
6335 * performing recovery.
6336 */
6337static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6338{
6339 struct nfs_server *server = NFS_SERVER(inode);
6340 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6341 struct rpc_clnt *clnt = server->client;
6342 struct nfs4_fsid_present_arg args = {
6343 .fh = NFS_FH(inode),
6344 .clientid = clp->cl_clientid,
6345 .renew = 1, /* append RENEW */
6346 };
6347 struct nfs4_fsid_present_res res = {
6348 .renew = 1,
6349 };
6350 struct rpc_message msg = {
6351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6352 .rpc_argp = &args,
6353 .rpc_resp = &res,
6354 .rpc_cred = cred,
6355 };
6356 unsigned long now = jiffies;
6357 int status;
6358
6359 res.fh = nfs_alloc_fhandle();
6360 if (res.fh == NULL)
6361 return -ENOMEM;
6362
6363 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6364 nfs4_set_sequence_privileged(&args.seq_args);
6365 status = nfs4_call_sync_sequence(clnt, server, &msg,
6366 &args.seq_args, &res.seq_res);
6367 nfs_free_fhandle(res.fh);
6368 if (status)
6369 return status;
6370
6371 do_renew_lease(clp, now);
6372 return 0;
6373}
6374
6375#ifdef CONFIG_NFS_V4_1
6376
6377/*
6378 * This operation also signals the server that this client is
6379 * performing "lease moved" recovery. The server can stop asserting
6380 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6381 * this operation is identified in the SEQUENCE operation in this
6382 * compound.
6383 */
6384static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6385{
6386 struct nfs_server *server = NFS_SERVER(inode);
6387 struct rpc_clnt *clnt = server->client;
6388 struct nfs4_fsid_present_arg args = {
6389 .fh = NFS_FH(inode),
6390 };
6391 struct nfs4_fsid_present_res res = {
6392 };
6393 struct rpc_message msg = {
6394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6395 .rpc_argp = &args,
6396 .rpc_resp = &res,
6397 .rpc_cred = cred,
6398 };
6399 int status;
6400
6401 res.fh = nfs_alloc_fhandle();
6402 if (res.fh == NULL)
6403 return -ENOMEM;
6404
6405 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6406 nfs4_set_sequence_privileged(&args.seq_args);
6407 status = nfs4_call_sync_sequence(clnt, server, &msg,
6408 &args.seq_args, &res.seq_res);
6409 nfs_free_fhandle(res.fh);
6410 if (status == NFS4_OK &&
6411 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6412 status = -NFS4ERR_LEASE_MOVED;
6413 return status;
6414}
6415
6416#endif /* CONFIG_NFS_V4_1 */
6417
6418/**
6419 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6420 * @inode: inode on FSID to check
6421 * @cred: credential to use for this operation
6422 *
6423 * Server indicates whether the FSID is present, moved, or not
6424 * recognized. This operation is necessary to clear a LEASE_MOVED
6425 * condition for this client ID.
6426 *
6427 * Returns NFS4_OK if the FSID is present on this server,
6428 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6429 * NFS4ERR code if some error occurred on the server, or a
6430 * negative errno if a local failure occurred.
6431 */
6432int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6433{
6434 struct nfs_server *server = NFS_SERVER(inode);
6435 struct nfs_client *clp = server->nfs_client;
6436 const struct nfs4_mig_recovery_ops *ops =
6437 clp->cl_mvops->mig_recovery_ops;
6438 struct nfs4_exception exception = { };
6439 int status;
6440
6441 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6442 (unsigned long long)server->fsid.major,
6443 (unsigned long long)server->fsid.minor,
6444 clp->cl_hostname);
6445 nfs_display_fhandle(NFS_FH(inode), __func__);
6446
6447 do {
6448 status = ops->fsid_present(inode, cred);
6449 if (status != -NFS4ERR_DELAY)
6450 break;
6451 nfs4_handle_exception(server, status, &exception);
6452 } while (exception.retry);
6453 return status;
6454}
6455
5ec16a85 6456/**
a5250def
WAA		 6457 * If 'use_integrity' is true and the state managment nfs_client
6458 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6459 * and the machine credential as per RFC3530bis and RFC5661 Security
6460 * Considerations sections. Otherwise, just use the user cred with the
6461 * filesystem's rpc_client.
5ec16a85 6462 */
a5250def 6463static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6464{
6465 int status;
6466 struct nfs4_secinfo_arg args = {
6467 .dir_fh = NFS_FH(dir),
6468 .name = name,
6469 };
6470 struct nfs4_secinfo_res res = {
6471 .flavors = flavors,
6472 };
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 };
a5250def 6478 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6479 struct rpc_cred *cred = NULL;
a5250def
WAA		 6480
6481 if (use_integrity) {
6482 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6483 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6484 msg.rpc_cred = cred;
a5250def 6485 }
5a5ea0d4
BS		 6486
6487 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6488
6489 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6490 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6491
a5250def
WAA		 6492 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6493 &res.seq_res, 0);
5a5ea0d4 6494 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6495
7cb852df
WAA		 6496 if (cred)
6497 put_rpccred(cred);
a5250def 6498
5a5ea0d4
BS		 6499 return status;
6500}
6501
72de53ec
BS		 6502int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6503 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6504{
6505 struct nfs4_exception exception = { };
6506 int err;
6507 do {
a5250def
WAA		 6508 err = -NFS4ERR_WRONGSEC;
6509
6510 /* try to use integrity protection with machine cred */
6511 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6512 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6513
6514 /*
6515 * if unable to use integrity protection, or SECINFO with
6516 * integrity protection returns NFS4ERR_WRONGSEC (which is
6517 * disallowed by spec, but exists in deployed servers) use
6518 * the current filesystem's rpc_client and the user cred.
6519 */
6520 if (err == -NFS4ERR_WRONGSEC)
6521 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6522
078ea3df
TM		 6523 trace_nfs4_secinfo(dir, name, err);
6524 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6525 &exception);
6526 } while (exception.retry);
6527 return err;
6528}
6529
557134a3 6530#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6531/*
6532 * Check the exchange flags returned by the server for invalid flags, having
6533 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6534 * DS flags set.
6535 */
6536static int nfs4_check_cl_exchange_flags(u32 flags)
6537{
6538 if (flags & ~EXCHGID4_FLAG_MASK_R)
6539 goto out_inval;
6540 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6541 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6542 goto out_inval;
6543 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6544 goto out_inval;
6545 return NFS_OK;
6546out_inval:
6547 return -NFS4ERR_INVAL;
6548}
6549
78fe0f41 6550static bool
79d4e1f0
CL		 6551nfs41_same_server_scope(struct nfs41_server_scope *a,
6552 struct nfs41_server_scope *b)
78fe0f41
WAA		 6553{
6554 if (a->server_scope_sz == b->server_scope_sz &&
6555 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6556 return true;
6557
6558 return false;
6559}
6560
7c44f1ae
WAA		 6561/*
6562 * nfs4_proc_bind_conn_to_session()
6563 *
6564 * The 4.1 client currently uses the same TCP connection for the
6565 * fore and backchannel.
6566 */
2cf047c9 6567int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6568{
6569 int status;
6570 struct nfs41_bind_conn_to_session_res res;
6571 struct rpc_message msg = {
6572 .rpc_proc =
6573 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6574 .rpc_argp = clp,
6575 .rpc_resp = &res,
2cf047c9 6576 .rpc_cred = cred,
7c44f1ae
WAA		 6577 };
6578
6579 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6580
6581 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6582 if (unlikely(res.session == NULL)) {
6583 status = -ENOMEM;
6584 goto out;
6585 }
6586
6587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6588 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6589 if (status == 0) {
6590 if (memcmp(res.session->sess_id.data,
6591 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6592 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6593 status = -EIO;
6594 goto out_session;
6595 }
6596 if (res.dir != NFS4_CDFS4_BOTH) {
6597 dprintk("NFS: %s: Unexpected direction from server\n",
6598 __func__);
6599 status = -EIO;
6600 goto out_session;
6601 }
6602 if (res.use_conn_in_rdma_mode) {
6603 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6604 __func__);
6605 status = -EIO;
6606 goto out_session;
6607 }
6608 }
6609out_session:
6610 kfree(res.session);
6611out:
6612 dprintk("<-- %s status= %d\n", __func__, status);
6613 return status;
6614}
6615
99fe60d0 6616/*
fa940720
WAA		 6617 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6618 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6619 */
6620static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6621 .how = SP4_MACH_CRED,
6622 .enforce.u.words = {
6623 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6624 1 << (OP_EXCHANGE_ID - 32) |
6625 1 << (OP_CREATE_SESSION - 32) |
6626 1 << (OP_DESTROY_SESSION - 32) |
6627 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6628 },
6629 .allow.u.words = {
6630 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6631 1 << (OP_LOCKU) |
6632 1 << (OP_COMMIT),
8b5bee2e 6633 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6634 1 << (OP_SECINFO_NO_NAME - 32) |
6635 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6636 1 << (OP_FREE_STATEID - 32) |
6637 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6638 }
6639};
6640
6641/*
6642 * Select the state protection mode for client `clp' given the server results
6643 * from exchange_id in `sp'.
99fe60d0 6644 *
2031cd1a
WAA		 6645 * Returns 0 on success, negative errno otherwise.
6646 */
6647static int nfs4_sp4_select_mode(struct nfs_client *clp,
6648 struct nfs41_state_protection *sp)
6649{
6650 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6651 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6652 1 << (OP_EXCHANGE_ID - 32) |
6653 1 << (OP_CREATE_SESSION - 32) |
6654 1 << (OP_DESTROY_SESSION - 32) |
6655 1 << (OP_DESTROY_CLIENTID - 32)
6656 };
6657 unsigned int i;
6658
6659 if (sp->how == SP4_MACH_CRED) {
6660 /* Print state protect result */
6661 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6662 for (i = 0; i <= LAST_NFS4_OP; i++) {
6663 if (test_bit(i, sp->enforce.u.longs))
6664 dfprintk(MOUNT, " enforce op %d\n", i);
6665 if (test_bit(i, sp->allow.u.longs))
6666 dfprintk(MOUNT, " allow op %d\n", i);
6667 }
6668
6669 /* make sure nothing is on enforce list that isn't supported */
6670 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6671 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6672 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6673 return -EINVAL;
6674 }
6675 }
6676
6677 /*
6678 * Minimal mode - state operations are allowed to use machine
6679 * credential. Note this already happens by default, so the
6680 * client doesn't have to do anything more than the negotiation.
6681 *
6682 * NOTE: we don't care if EXCHANGE_ID is in the list -
6683 * we're already using the machine cred for exchange_id
6684 * and will never use a different cred.
6685 */
6686 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6687 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6688 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6689 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6690 dfprintk(MOUNT, "sp4_mach_cred:\n");
6691 dfprintk(MOUNT, " minimal mode enabled\n");
6692 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6693 } else {
6694 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6695 return -EINVAL;
6696 }
fa940720
WAA		 6697
6698 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6699 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6700 dfprintk(MOUNT, " cleanup mode enabled\n");
6701 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6702 }
8b5bee2e
WAA		 6703
6704 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6705 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6706 dfprintk(MOUNT, " secinfo mode enabled\n");
6707 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6708 }
3787d506
WAA		 6709
6710 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6711 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6712 dfprintk(MOUNT, " stateid mode enabled\n");
6713 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6714 }
8c21c62c
WAA		 6715
6716 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6717 dfprintk(MOUNT, " write mode enabled\n");
6718 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6719 }
6720
6721 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6722 dfprintk(MOUNT, " commit mode enabled\n");
6723 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6724 }
2031cd1a
WAA		 6725 }
6726
6727 return 0;
6728}
6729
6730/*
6731 * _nfs4_proc_exchange_id()
6bbb4ae8 6732 *
2031cd1a 6733 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6734 */
2031cd1a
WAA		 6735static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6736 u32 sp4_how)
99fe60d0
BH		 6737{
6738 nfs4_verifier verifier;
6739 struct nfs41_exchange_id_args args = {
cd93710e 6740 .verifier = &verifier,
99fe60d0 6741 .client = clp,
cd3fadec 6742#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6743 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6744 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6745 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6746#else
6747 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6748 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6749#endif
99fe60d0
BH		 6750 };
6751 struct nfs41_exchange_id_res res = {
32b01310 6752 0
99fe60d0
BH		 6753 };
6754 int status;
6755 struct rpc_message msg = {
6756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6757 .rpc_argp = &args,
6758 .rpc_resp = &res,
6759 .rpc_cred = cred,
6760 };
99fe60d0 6761
f092075d 6762 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6763 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6764 sizeof(args.id));
6bbb4ae8
CL		 6765 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6766 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6767 args.id_len, args.id);
99fe60d0 6768
acdeb69d 6769 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6770 GFP_NOFS);
acdeb69d 6771 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6772 status = -ENOMEM;
6773 goto out;
6774 }
78fe0f41 6775
79d4e1f0 6776 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6777 GFP_NOFS);
177313f1 6778 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6779 status = -ENOMEM;
acdeb69d 6780 goto out_server_owner;
abe9a6d5 6781 }
78fe0f41 6782
bbafffd2 6783 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6784 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6785 status = -ENOMEM;
6786 goto out_server_scope;
6787 }
6788
2031cd1a
WAA		 6789 switch (sp4_how) {
6790 case SP4_NONE:
6791 args.state_protect.how = SP4_NONE;
6792 break;
6793
6794 case SP4_MACH_CRED:
6795 args.state_protect = nfs4_sp4_mach_cred_request;
6796 break;
6797
6798 default:
6799 /* unsupported! */
6800 WARN_ON_ONCE(1);
6801 status = -EINVAL;
6802 goto out_server_scope;
6803 }
6804
1bd714f2 6805 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6806 trace_nfs4_exchange_id(clp, status);
177313f1 6807 if (status == 0)
32b01310 6808 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6809
2031cd1a
WAA		 6810 if (status == 0)
6811 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6812
acdeb69d 6813 if (status == 0) {
32b01310
TM		 6814 clp->cl_clientid = res.clientid;
6815 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6816 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6817 clp->cl_seqid = res.seqid;
6818
acdeb69d
CL		 6819 kfree(clp->cl_serverowner);
6820 clp->cl_serverowner = res.server_owner;
6821 res.server_owner = NULL;
78fe0f41 6822
7d2ed9ac 6823 /* use the most recent implementation id */
59155546
CL		 6824 kfree(clp->cl_implid);
6825 clp->cl_implid = res.impl_id;
7d2ed9ac 6826
177313f1 6827 if (clp->cl_serverscope != NULL &&
79d4e1f0 6828 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6829 res.server_scope)) {
6830 dprintk("%s: server_scope mismatch detected\n",
6831 __func__);
6832 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6833 kfree(clp->cl_serverscope);
6834 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6835 }
6836
177313f1 6837 if (clp->cl_serverscope == NULL) {
79d4e1f0 6838 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6839 goto out;
6840 }
32b01310
TM		 6841 } else
6842 kfree(res.impl_id);
7d2ed9ac 6843
acdeb69d
CL		 6844out_server_owner:
6845 kfree(res.server_owner);
7d2ed9ac 6846out_server_scope:
abe9a6d5
WAA		 6847 kfree(res.server_scope);
6848out:
177313f1 6849 if (clp->cl_implid != NULL)
6bbb4ae8 6850 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6851 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6852 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6853 clp->cl_implid->date.seconds,
6854 clp->cl_implid->date.nseconds);
6bbb4ae8 6855 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6856 return status;
6857}
6858
2031cd1a
WAA		 6859/*
6860 * nfs4_proc_exchange_id()
6861 *
6862 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6863 *
6864 * Since the clientid has expired, all compounds using sessions
6865 * associated with the stale clientid will be returning
6866 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6867 * be in some phase of session reset.
6868 *
6869 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6870 */
6871int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6872{
6873 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6874 int status;
6875
6876 /* try SP4_MACH_CRED if krb5i/p */
6877 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6878 authflavor == RPC_AUTH_GSS_KRB5P) {
6879 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6880 if (!status)
6881 return 0;
6882 }
6883
6884 /* try SP4_NONE */
6885 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6886}
6887
66245539
TM		 6888static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6889 struct rpc_cred *cred)
6890{
6891 struct rpc_message msg = {
6892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6893 .rpc_argp = clp,
6894 .rpc_cred = cred,
6895 };
6896 int status;
6897
6898 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6899 trace_nfs4_destroy_clientid(clp, status);
66245539 6900 if (status)
02c67525 6901 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6902 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6903 return status;
6904}
6905
6906static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6907 struct rpc_cred *cred)
6908{
6909 unsigned int loop;
6910 int ret;
6911
6912 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6913 ret = _nfs4_proc_destroy_clientid(clp, cred);
6914 switch (ret) {
6915 case -NFS4ERR_DELAY:
6916 case -NFS4ERR_CLIENTID_BUSY:
6917 ssleep(1);
6918 break;
6919 default:
6920 return ret;
6921 }
6922 }
6923 return 0;
6924}
6925
6926int nfs4_destroy_clientid(struct nfs_client *clp)
6927{
6928 struct rpc_cred *cred;
6929 int ret = 0;
6930
6931 if (clp->cl_mvops->minor_version < 1)
6932 goto out;
6933 if (clp->cl_exchange_flags == 0)
6934 goto out;
05f4c350
CL		 6935 if (clp->cl_preserve_clid)
6936 goto out;
73d8bde5 6937 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6938 ret = nfs4_proc_destroy_clientid(clp, cred);
6939 if (cred)
6940 put_rpccred(cred);
6941 switch (ret) {
6942 case 0:
6943 case -NFS4ERR_STALE_CLIENTID:
6944 clp->cl_exchange_flags = 0;
6945 }
6946out:
6947 return ret;
6948}
6949
2050f0cc
AA		 6950struct nfs4_get_lease_time_data {
6951 struct nfs4_get_lease_time_args *args;
6952 struct nfs4_get_lease_time_res *res;
6953 struct nfs_client *clp;
6954};
6955
6956static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6957 void *calldata)
6958{
2050f0cc
AA		 6959 struct nfs4_get_lease_time_data *data =
6960 (struct nfs4_get_lease_time_data *)calldata;
6961
6962 dprintk("--> %s\n", __func__);
6963 /* just setup sequence, do not trigger session recovery
6964 since we're invoked within one */
d9afbd1b
TM		 6965 nfs41_setup_sequence(data->clp->cl_session,
6966 &data->args->la_seq_args,
6967 &data->res->lr_seq_res,
6968 task);
2050f0cc
AA		 6969 dprintk("<-- %s\n", __func__);
6970}
6971
6972/*
6973 * Called from nfs4_state_manager thread for session setup, so don't recover
6974 * from sequence operation or clientid errors.
6975 */
6976static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6977{
6978 struct nfs4_get_lease_time_data *data =
6979 (struct nfs4_get_lease_time_data *)calldata;
6980
6981 dprintk("--> %s\n", __func__);
14516c3a
TM		 6982 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6983 return;
2050f0cc
AA		 6984 switch (task->tk_status) {
6985 case -NFS4ERR_DELAY:
6986 case -NFS4ERR_GRACE:
6987 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6988 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6989 task->tk_status = 0;
a8a4ae3a
AA		 6990 /* fall through */
6991 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6992 rpc_restart_call_prepare(task);
2050f0cc
AA		 6993 return;
6994 }
2050f0cc
AA		 6995 dprintk("<-- %s\n", __func__);
6996}
6997
17280175 6998static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6999 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7000 .rpc_call_done = nfs4_get_lease_time_done,
7001};
7002
7003int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7004{
7005 struct rpc_task *task;
7006 struct nfs4_get_lease_time_args args;
7007 struct nfs4_get_lease_time_res res = {
7008 .lr_fsinfo = fsinfo,
7009 };
7010 struct nfs4_get_lease_time_data data = {
7011 .args = &args,
7012 .res = &res,
7013 .clp = clp,
7014 };
7015 struct rpc_message msg = {
7016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7017 .rpc_argp = &args,
7018 .rpc_resp = &res,
7019 };
7020 struct rpc_task_setup task_setup = {
7021 .rpc_client = clp->cl_rpcclient,
7022 .rpc_message = &msg,
7023 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7024 .callback_data = &data,
7025 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7026 };
7027 int status;
7028
a9c92d6b 7029 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7030 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7031 dprintk("--> %s\n", __func__);
7032 task = rpc_run_task(&task_setup);
7033
7034 if (IS_ERR(task))
7035 status = PTR_ERR(task);
7036 else {
7037 status = task->tk_status;
7038 rpc_put_task(task);
7039 }
7040 dprintk("<-- %s return %d\n", __func__, status);
7041
7042 return status;
7043}
7044
fc931582
AA		 7045/*
7046 * Initialize the values to be used by the client in CREATE_SESSION
7047 * If nfs4_init_session set the fore channel request and response sizes,
7048 * use them.
7049 *
7050 * Set the back channel max_resp_sz_cached to zero to force the client to
7051 * always set csa_cachethis to FALSE because the current implementation
7052 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7053 */
7054static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7055{
18aad3d5
AA		 7056 unsigned int max_rqst_sz, max_resp_sz;
7057
7058 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7059 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7060
fc931582 7061 /* Fore channel attributes */
18aad3d5
AA		 7062 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7063 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7064 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7065 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7066
7067 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7068 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7069 __func__,
7070 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7071 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7072
7073 /* Back channel attributes */
fc931582
AA		 7074 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7075 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7076 args->bc_attrs.max_resp_sz_cached = 0;
7077 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7078 args->bc_attrs.max_reqs = 1;
7079
7080 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7081 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7082 __func__,
7083 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7084 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7085 args->bc_attrs.max_reqs);
7086}
7087
43c2e885 7088static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7089{
43c2e885
BF		 7090 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7091 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7092
43c2e885
BF		 7093 if (rcvd->max_resp_sz > sent->max_resp_sz)
7094 return -EINVAL;
7095 /*
7096 * Our requested max_ops is the minimum we need; we're not
7097 * prepared to break up compounds into smaller pieces than that.
7098 * So, no point even trying to continue if the server won't
7099 * cooperate:
7100 */
7101 if (rcvd->max_ops < sent->max_ops)
7102 return -EINVAL;
7103 if (rcvd->max_reqs == 0)
7104 return -EINVAL;
b4b9a0c1
VG		 7105 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7106 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7107 return 0;
8d35301d
AA		 7108}
7109
43c2e885
BF		 7110static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7111{
7112 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7113 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7114
43c2e885
BF		 7115 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7116 return -EINVAL;
7117 if (rcvd->max_resp_sz < sent->max_resp_sz)
7118 return -EINVAL;
7119 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7120 return -EINVAL;
7121 /* These would render the backchannel useless: */
b4b9a0c1 7122 if (rcvd->max_ops != sent->max_ops)
43c2e885 7123 return -EINVAL;
b4b9a0c1 7124 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7125 return -EINVAL;
7126 return 0;
7127}
8d35301d 7128
8d35301d
AA		 7129static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7130 struct nfs4_session *session)
7131{
43c2e885 7132 int ret;
8d35301d 7133
43c2e885
BF		 7134 ret = nfs4_verify_fore_channel_attrs(args, session);
7135 if (ret)
7136 return ret;
7137 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7138}
7139
848f5bda
TM		 7140static int _nfs4_proc_create_session(struct nfs_client *clp,
7141 struct rpc_cred *cred)
fc931582
AA		 7142{
7143 struct nfs4_session *session = clp->cl_session;
7144 struct nfs41_create_session_args args = {
7145 .client = clp,
7146 .cb_program = NFS4_CALLBACK,
7147 };
7148 struct nfs41_create_session_res res = {
7149 .client = clp,
7150 };
7151 struct rpc_message msg = {
7152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7153 .rpc_argp = &args,
7154 .rpc_resp = &res,
848f5bda 7155 .rpc_cred = cred,
fc931582
AA		 7156 };
7157 int status;
7158
7159 nfs4_init_channel_attrs(&args);
0f91421e 7160 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7161
1bd714f2 7162 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7163 trace_nfs4_create_session(clp, status);
fc931582 7164
43095d39 7165 if (!status) {
8d35301d
AA		 7166 /* Verify the session's negotiated channel_attrs values */
7167 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7168 /* Increment the clientid slot sequence id */
7169 clp->cl_seqid++;
7170 }
7171
7172 return status;
7173}
7174
7175/*
7176 * Issues a CREATE_SESSION operation to the server.
7177 * It is the responsibility of the caller to verify the session is
7178 * expired before calling this routine.
7179 */
848f5bda 7180int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7181{
7182 int status;
7183 unsigned *ptr;
fc931582
AA		 7184 struct nfs4_session *session = clp->cl_session;
7185
7186 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7187
848f5bda 7188 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7189 if (status)
7190 goto out;
7191
aacd5537
AA		 7192 /* Init or reset the session slot tables */
7193 status = nfs4_setup_session_slot_tables(session);
7194 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7195 if (status)
7196 goto out;
7197
7198 ptr = (unsigned *)&session->sess_id.data[0];
7199 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7200 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7201out:
7202 dprintk("<-- %s\n", __func__);
7203 return status;
7204}
7205
0f3e66c6
AA		 7206/*
7207 * Issue the over-the-wire RPC DESTROY_SESSION.
7208 * The caller must serialize access to this routine.
7209 */
848f5bda
TM		 7210int nfs4_proc_destroy_session(struct nfs4_session *session,
7211 struct rpc_cred *cred)
0f3e66c6 7212{
848f5bda
TM		 7213 struct rpc_message msg = {
7214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7215 .rpc_argp = session,
7216 .rpc_cred = cred,
7217 };
0f3e66c6 7218 int status = 0;
0f3e66c6
AA		 7219
7220 dprintk("--> nfs4_proc_destroy_session\n");
7221
7222 /* session is still being setup */
7223 if (session->clp->cl_cons_state != NFS_CS_READY)
7224 return status;
7225
1bd714f2 7226 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7227 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7228
7229 if (status)
08106ac7 7230 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7231 "Session has been destroyed regardless...\n", status);
7232
7233 dprintk("<-- nfs4_proc_destroy_session\n");
7234 return status;
7235}
7236
fc01cea9
AA		 7237/*
7238 * Renew the cl_session lease.
7239 */
d5f8d3fe
TM		 7240struct nfs4_sequence_data {
7241 struct nfs_client *clp;
7242 struct nfs4_sequence_args args;
7243 struct nfs4_sequence_res res;
7244};
7245
dc96aef9
AB		 7246static void nfs41_sequence_release(void *data)
7247{
d5f8d3fe
TM		 7248 struct nfs4_sequence_data *calldata = data;
7249 struct nfs_client *clp = calldata->clp;
dc96aef9 7250
7135840f
AB		 7251 if (atomic_read(&clp->cl_count) > 1)
7252 nfs4_schedule_state_renewal(clp);
7253 nfs_put_client(clp);
d5f8d3fe 7254 kfree(calldata);
dc96aef9
AB		 7255}
7256
aa5190d0
TM		 7257static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7258{
7259 switch(task->tk_status) {
7260 case -NFS4ERR_DELAY:
aa5190d0
TM		 7261 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7262 return -EAGAIN;
7263 default:
0400a6b0 7264 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7265 }
7266 return 0;
7267}
7268
dc96aef9 7269static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7270{
d5f8d3fe
TM		 7271 struct nfs4_sequence_data *calldata = data;
7272 struct nfs_client *clp = calldata->clp;
fc01cea9 7273
14516c3a
TM		 7274 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7275 return;
fc01cea9 7276
c6d01c6f 7277 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7278 if (task->tk_status < 0) {
7279 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7280 if (atomic_read(&clp->cl_count) == 1)
7281 goto out;
fc01cea9 7282
aa5190d0
TM		 7283 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7284 rpc_restart_call_prepare(task);
fc01cea9
AA		 7285 return;
7286 }
7287 }
fc01cea9 7288 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7289out:
fc01cea9
AA		 7290 dprintk("<-- %s\n", __func__);
7291}
7292
7293static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7294{
d5f8d3fe
TM		 7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7297 struct nfs4_sequence_args *args;
7298 struct nfs4_sequence_res *res;
7299
fc01cea9
AA		 7300 args = task->tk_msg.rpc_argp;
7301 res = task->tk_msg.rpc_resp;
7302
d9afbd1b 7303 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7304}
7305
7306static const struct rpc_call_ops nfs41_sequence_ops = {
7307 .rpc_call_done = nfs41_sequence_call_done,
7308 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7309 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7310};
7311
8fe72bac
TM		 7312static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7313 struct rpc_cred *cred,
7314 bool is_privileged)
fc01cea9 7315{
d5f8d3fe 7316 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7317 struct rpc_message msg = {
7318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7319 .rpc_cred = cred,
7320 };
71ac6da9
TM		 7321 struct rpc_task_setup task_setup_data = {
7322 .rpc_client = clp->cl_rpcclient,
7323 .rpc_message = &msg,
8fe72bac 7324 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7325 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7326 };
fc01cea9 7327
7135840f 7328 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7329 return ERR_PTR(-EIO);
dfb4f309 7330 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7331 if (calldata == NULL) {
7135840f 7332 nfs_put_client(clp);
71ac6da9 7333 return ERR_PTR(-ENOMEM);
fc01cea9 7334 }
a9c92d6b 7335 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7336 if (is_privileged)
7337 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7338 msg.rpc_argp = &calldata->args;
7339 msg.rpc_resp = &calldata->res;
7340 calldata->clp = clp;
71ac6da9 7341 task_setup_data.callback_data = calldata;
fc01cea9 7342
71ac6da9
TM		 7343 return rpc_run_task(&task_setup_data);
7344}
7345
2f60ea6b 7346static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7347{
7348 struct rpc_task *task;
7349 int ret = 0;
7350
2f60ea6b
TM		 7351 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7352 return 0;
8fe72bac 7353 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7354 if (IS_ERR(task))
7355 ret = PTR_ERR(task);
7356 else
bf294b41 7357 rpc_put_task_async(task);
71ac6da9
TM		 7358 dprintk("<-- %s status=%d\n", __func__, ret);
7359 return ret;
7360}
7361
7362static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7363{
7364 struct rpc_task *task;
7365 int ret;
7366
8fe72bac 7367 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7368 if (IS_ERR(task)) {
7369 ret = PTR_ERR(task);
7370 goto out;
7371 }
7372 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7373 if (!ret) {
7374 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7375
7376 if (task->tk_status == 0)
7377 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7378 ret = task->tk_status;
b4410c2f 7379 }
71ac6da9
TM		 7380 rpc_put_task(task);
7381out:
7382 dprintk("<-- %s status=%d\n", __func__, ret);
7383 return ret;
fc01cea9
AA		 7384}
7385
fce5c838
RL		 7386struct nfs4_reclaim_complete_data {
7387 struct nfs_client *clp;
7388 struct nfs41_reclaim_complete_args arg;
7389 struct nfs41_reclaim_complete_res res;
7390};
7391
7392static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7393{
7394 struct nfs4_reclaim_complete_data *calldata = data;
7395
d9afbd1b
TM		 7396 nfs41_setup_sequence(calldata->clp->cl_session,
7397 &calldata->arg.seq_args,
7398 &calldata->res.seq_res,
7399 task);
fce5c838
RL		 7400}
7401
aa5190d0
TM		 7402static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7403{
7404 switch(task->tk_status) {
7405 case 0:
7406 case -NFS4ERR_COMPLETE_ALREADY:
7407 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7408 break;
7409 case -NFS4ERR_DELAY:
aa5190d0 7410 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7411 /* fall through */
7412 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7413 return -EAGAIN;
7414 default:
0400a6b0 7415 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7416 }
7417 return 0;
7418}
7419
fce5c838
RL		 7420static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7421{
7422 struct nfs4_reclaim_complete_data *calldata = data;
7423 struct nfs_client *clp = calldata->clp;
7424 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7425
7426 dprintk("--> %s\n", __func__);
14516c3a
TM		 7427 if (!nfs41_sequence_done(task, res))
7428 return;
fce5c838 7429
c6d01c6f 7430 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7431 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7432 rpc_restart_call_prepare(task);
7433 return;
7434 }
fce5c838
RL		 7435 dprintk("<-- %s\n", __func__);
7436}
7437
7438static void nfs4_free_reclaim_complete_data(void *data)
7439{
7440 struct nfs4_reclaim_complete_data *calldata = data;
7441
7442 kfree(calldata);
7443}
7444
7445static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7446 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7447 .rpc_call_done = nfs4_reclaim_complete_done,
7448 .rpc_release = nfs4_free_reclaim_complete_data,
7449};
7450
7451/*
7452 * Issue a global reclaim complete.
7453 */
965e9c23
TM		 7454static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7455 struct rpc_cred *cred)
fce5c838
RL		 7456{
7457 struct nfs4_reclaim_complete_data *calldata;
7458 struct rpc_task *task;
7459 struct rpc_message msg = {
7460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7461 .rpc_cred = cred,
fce5c838
RL		 7462 };
7463 struct rpc_task_setup task_setup_data = {
7464 .rpc_client = clp->cl_rpcclient,
7465 .rpc_message = &msg,
7466 .callback_ops = &nfs4_reclaim_complete_call_ops,
7467 .flags = RPC_TASK_ASYNC,
7468 };
7469 int status = -ENOMEM;
7470
7471 dprintk("--> %s\n", __func__);
8535b2be 7472 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7473 if (calldata == NULL)
7474 goto out;
7475 calldata->clp = clp;
7476 calldata->arg.one_fs = 0;
fce5c838 7477
a9c92d6b 7478 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7479 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7480 msg.rpc_argp = &calldata->arg;
7481 msg.rpc_resp = &calldata->res;
7482 task_setup_data.callback_data = calldata;
7483 task = rpc_run_task(&task_setup_data);
acf82b85 7484 if (IS_ERR(task)) {
fce5c838 7485 status = PTR_ERR(task);
acf82b85
DC		 7486 goto out;
7487 }
c34c32ea
AA		 7488 status = nfs4_wait_for_completion_rpc_task(task);
7489 if (status == 0)
7490 status = task->tk_status;
fce5c838 7491 rpc_put_task(task);
acf82b85 7492 return 0;
fce5c838
RL		 7493out:
7494 dprintk("<-- %s status=%d\n", __func__, status);
7495 return status;
7496}
b1f69b75
AA		 7497
7498static void
7499nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7500{
7501 struct nfs4_layoutget *lgp = calldata;
c31663d4 7502 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7503 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7504
7505 dprintk("--> %s\n", __func__);
c31663d4
FI		 7506 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7507 * right now covering the LAYOUTGET we are about to send.
7508 * However, that is not so catastrophic, and there seems
7509 * to be no way to prevent it completely.
7510 */
6ba7db34 7511 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7512 &lgp->res.seq_res, task))
b1f69b75 7513 return;
cf7d63f1
FI		 7514 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7515 NFS_I(lgp->args.inode)->layout,
7516 lgp->args.ctx->state)) {
7517 rpc_exit(task, NFS4_OK);
cf7d63f1 7518 }
b1f69b75
AA		 7519}
7520
7521static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7522{
7523 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7524 struct inode *inode = lgp->args.inode;
7525 struct nfs_server *server = NFS_SERVER(inode);
7526 struct pnfs_layout_hdr *lo;
7527 struct nfs4_state *state = NULL;
ed7e5423 7528 unsigned long timeo, now, giveup;
b1f69b75 7529
ed7e5423 7530 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7531
6ba7db34 7532 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7533 goto out;
b1f69b75
AA		 7534
7535 switch (task->tk_status) {
7536 case 0:
ee314c2a 7537 goto out;
ed7e5423
BH		 7538 /*
7539 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7540 * (or clients) writing to the same RAID stripe
7541 */
b1f69b75 7542 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7543 /*
7544 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7545 * existing layout before getting a new one).
7546 */
b1f69b75 7547 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7548 timeo = rpc_get_timeout(task->tk_client);
7549 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7550 now = jiffies;
7551 if (time_after(giveup, now)) {
7552 unsigned long delay;
7553
7554 /* Delay for:
7555 * - Not less then NFS4_POLL_RETRY_MIN.
7556 * - One last time a jiffie before we give up
7557 * - exponential backoff (time_now minus start_attempt)
7558 */
7559 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7560 min((giveup - now - 1),
7561 now - lgp->args.timestamp));
7562
7563 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7564 __func__, delay);
7565 rpc_delay(task, delay);
7566 task->tk_status = 0;
7567 rpc_restart_call_prepare(task);
7568 goto out; /* Do not call nfs4_async_handle_error() */
7569 }
ee314c2a
TM		 7570 break;
7571 case -NFS4ERR_EXPIRED:
7572 case -NFS4ERR_BAD_STATEID:
7573 spin_lock(&inode->i_lock);
7574 lo = NFS_I(inode)->layout;
7575 if (!lo || list_empty(&lo->plh_segs)) {
7576 spin_unlock(&inode->i_lock);
7577 /* If the open stateid was bad, then recover it. */
7578 state = lgp->args.ctx->state;
7579 } else {
7580 LIST_HEAD(head);
7581
7582 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7583 spin_unlock(&inode->i_lock);
7584 /* Mark the bad layout state as invalid, then
7585 * retry using the open stateid. */
7586 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7587 }
7588 }
ee314c2a
TM		 7589 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7590 rpc_restart_call_prepare(task);
7591out:
b1f69b75
AA		 7592 dprintk("<-- %s\n", __func__);
7593}
7594
8554116e
IK		 7595static size_t max_response_pages(struct nfs_server *server)
7596{
7597 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7598 return nfs_page_array_len(0, max_resp_sz);
7599}
7600
7601static void nfs4_free_pages(struct page **pages, size_t size)
7602{
7603 int i;
7604
7605 if (!pages)
7606 return;
7607
7608 for (i = 0; i < size; i++) {
7609 if (!pages[i])
7610 break;
7611 __free_page(pages[i]);
7612 }
7613 kfree(pages);
7614}
7615
7616static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7617{
7618 struct page **pages;
7619 int i;
7620
7621 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7622 if (!pages) {
7623 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7624 return NULL;
7625 }
7626
7627 for (i = 0; i < size; i++) {
7628 pages[i] = alloc_page(gfp_flags);
7629 if (!pages[i]) {
7630 dprintk("%s: failed to allocate page\n", __func__);
7631 nfs4_free_pages(pages, size);
7632 return NULL;
7633 }
7634 }
7635
7636 return pages;
7637}
7638
b1f69b75
AA		 7639static void nfs4_layoutget_release(void *calldata)
7640{
7641 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7642 struct inode *inode = lgp->args.inode;
7643 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7644 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7645
7646 dprintk("--> %s\n", __func__);
8554116e 7647 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7648 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7649 put_nfs_open_context(lgp->args.ctx);
7650 kfree(calldata);
7651 dprintk("<-- %s\n", __func__);
7652}
7653
7654static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7655 .rpc_call_prepare = nfs4_layoutget_prepare,
7656 .rpc_call_done = nfs4_layoutget_done,
7657 .rpc_release = nfs4_layoutget_release,
7658};
7659
a0b0a6e3
TM		 7660struct pnfs_layout_segment *
7661nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7662{
a47970ff
WAA		 7663 struct inode *inode = lgp->args.inode;
7664 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7665 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7666 struct rpc_task *task;
7667 struct rpc_message msg = {
7668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7669 .rpc_argp = &lgp->args,
7670 .rpc_resp = &lgp->res,
6ab59344 7671 .rpc_cred = lgp->cred,
b1f69b75
AA		 7672 };
7673 struct rpc_task_setup task_setup_data = {
7674 .rpc_client = server->client,
7675 .rpc_message = &msg,
7676 .callback_ops = &nfs4_layoutget_call_ops,
7677 .callback_data = lgp,
7678 .flags = RPC_TASK_ASYNC,
7679 };
a0b0a6e3 7680 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7681 int status = 0;
7682
7683 dprintk("--> %s\n", __func__);
7684
8554116e
IK		 7685 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7686 if (!lgp->args.layout.pages) {
7687 nfs4_layoutget_release(lgp);
a0b0a6e3 7688 return ERR_PTR(-ENOMEM);
8554116e
IK		 7689 }
7690 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7691 lgp->args.timestamp = jiffies;
8554116e 7692
35124a09 7693 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7694 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7695 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7696
7697 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7698 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7699
b1f69b75
AA		 7700 task = rpc_run_task(&task_setup_data);
7701 if (IS_ERR(task))
a0b0a6e3 7702 return ERR_CAST(task);
b1f69b75 7703 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7704 if (status == 0)
7705 status = task->tk_status;
1037e6ea
TM		 7706 trace_nfs4_layoutget(lgp->args.ctx,
7707 &lgp->args.range,
7708 &lgp->res.range,
7709 status);
085b7a45
WAA		 7710 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7711 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7712 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7713 rpc_put_task(task);
7714 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7715 if (status)
7716 return ERR_PTR(status);
7717 return lseg;
b1f69b75
AA		 7718}
7719
cbe82603
BH		 7720static void
7721nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7722{
7723 struct nfs4_layoutreturn *lrp = calldata;
7724
7725 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7726 nfs41_setup_sequence(lrp->clp->cl_session,
7727 &lrp->args.seq_args,
7728 &lrp->res.seq_res,
7729 task);
cbe82603
BH		 7730}
7731
7732static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7733{
7734 struct nfs4_layoutreturn *lrp = calldata;
7735 struct nfs_server *server;
7736
7737 dprintk("--> %s\n", __func__);
7738
6ba7db34 7739 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7740 return;
7741
7742 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7743 switch (task->tk_status) {
7744 default:
7745 task->tk_status = 0;
7746 case 0:
7747 break;
7748 case -NFS4ERR_DELAY:
7749 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7750 break;
d00c5d43 7751 rpc_restart_call_prepare(task);
cbe82603
BH		 7752 return;
7753 }
cbe82603
BH		 7754 dprintk("<-- %s\n", __func__);
7755}
7756
7757static void nfs4_layoutreturn_release(void *calldata)
7758{
7759 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7760 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7761
7762 dprintk("--> %s\n", __func__);
849b286f
TM		 7763 spin_lock(&lo->plh_inode->i_lock);
7764 if (lrp->res.lrs_present)
7765 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7766 lo->plh_block_lgets--;
7767 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7768 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7769 kfree(calldata);
7770 dprintk("<-- %s\n", __func__);
7771}
7772
7773static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7774 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7775 .rpc_call_done = nfs4_layoutreturn_done,
7776 .rpc_release = nfs4_layoutreturn_release,
7777};
7778
7779int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7780{
7781 struct rpc_task *task;
7782 struct rpc_message msg = {
7783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7784 .rpc_argp = &lrp->args,
7785 .rpc_resp = &lrp->res,
9556000d 7786 .rpc_cred = lrp->cred,
cbe82603
BH		 7787 };
7788 struct rpc_task_setup task_setup_data = {
1771c577 7789 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7790 .rpc_message = &msg,
7791 .callback_ops = &nfs4_layoutreturn_call_ops,
7792 .callback_data = lrp,
7793 };
7794 int status;
7795
7796 dprintk("--> %s\n", __func__);
a9c92d6b 7797 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7798 task = rpc_run_task(&task_setup_data);
7799 if (IS_ERR(task))
7800 return PTR_ERR(task);
7801 status = task->tk_status;
1037e6ea 7802 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7803 dprintk("<-- %s status=%d\n", __func__, status);
7804 rpc_put_task(task);
7805 return status;
7806}
7807
7f11d8d3
AA		 7808/*
7809 * Retrieve the list of Data Server devices from the MDS.
7810 */
7811static int _nfs4_getdevicelist(struct nfs_server *server,
7812 const struct nfs_fh *fh,
7813 struct pnfs_devicelist *devlist)
7814{
7815 struct nfs4_getdevicelist_args args = {
7816 .fh = fh,
7817 .layoutclass = server->pnfs_curr_ld->id,
7818 };
7819 struct nfs4_getdevicelist_res res = {
7820 .devlist = devlist,
7821 };
7822 struct rpc_message msg = {
7823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7824 .rpc_argp = &args,
7825 .rpc_resp = &res,
7826 };
7827 int status;
7828
7829 dprintk("--> %s\n", __func__);
7830 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7831 &res.seq_res, 0);
7832 dprintk("<-- %s status=%d\n", __func__, status);
7833 return status;
7834}
7835
7836int nfs4_proc_getdevicelist(struct nfs_server *server,
7837 const struct nfs_fh *fh,
7838 struct pnfs_devicelist *devlist)
7839{
7840 struct nfs4_exception exception = { };
7841 int err;
7842
7843 do {
7844 err = nfs4_handle_exception(server,
7845 _nfs4_getdevicelist(server, fh, devlist),
7846 &exception);
7847 } while (exception.retry);
7848
7849 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7850 err, devlist->num_devs);
7851
7852 return err;
7853}
7854EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7855
b1f69b75 7856static int
cd5875fe
TM		 7857_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7858 struct pnfs_device *pdev,
7859 struct rpc_cred *cred)
b1f69b75
AA		 7860{
7861 struct nfs4_getdeviceinfo_args args = {
7862 .pdev = pdev,
7863 };
7864 struct nfs4_getdeviceinfo_res res = {
7865 .pdev = pdev,
7866 };
7867 struct rpc_message msg = {
7868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7869 .rpc_argp = &args,
7870 .rpc_resp = &res,
cd5875fe 7871 .rpc_cred = cred,
b1f69b75
AA		 7872 };
7873 int status;
7874
7875 dprintk("--> %s\n", __func__);
7c513058 7876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7877 dprintk("<-- %s status=%d\n", __func__, status);
7878
7879 return status;
7880}
7881
cd5875fe
TM		 7882int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7883 struct pnfs_device *pdev,
7884 struct rpc_cred *cred)
b1f69b75
AA		 7885{
7886 struct nfs4_exception exception = { };
7887 int err;
7888
7889 do {
7890 err = nfs4_handle_exception(server,
cd5875fe 7891 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7892 &exception);
7893 } while (exception.retry);
7894 return err;
7895}
7896EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7897
863a3c6c
AA		 7898static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7899{
7900 struct nfs4_layoutcommit_data *data = calldata;
7901 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7902 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7903
d9afbd1b
TM		 7904 nfs41_setup_sequence(session,
7905 &data->args.seq_args,
7906 &data->res.seq_res,
7907 task);
863a3c6c
AA		 7908}
7909
7910static void
7911nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7912{
7913 struct nfs4_layoutcommit_data *data = calldata;
7914 struct nfs_server *server = NFS_SERVER(data->args.inode);
7915
6ba7db34 7916 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7917 return;
7918
7919 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7920 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7921 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7922 case -NFS4ERR_BADLAYOUT: /* no layout */
7923 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7924 task->tk_status = 0;
e59d27e0 7925 case 0:
e59d27e0
TM		 7926 break;
7927 default:
7928 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7929 rpc_restart_call_prepare(task);
7930 return;
7931 }
7932 }
863a3c6c
AA		 7933}
7934
7935static void nfs4_layoutcommit_release(void *calldata)
7936{
7937 struct nfs4_layoutcommit_data *data = calldata;
7938
db29c089 7939 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7940 nfs_post_op_update_inode_force_wcc(data->args.inode,
7941 data->res.fattr);
863a3c6c
AA		 7942 put_rpccred(data->cred);
7943 kfree(data);
7944}
7945
7946static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7947 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7948 .rpc_call_done = nfs4_layoutcommit_done,
7949 .rpc_release = nfs4_layoutcommit_release,
7950};
7951
7952int
ef311537 7953nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7954{
7955 struct rpc_message msg = {
7956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7957 .rpc_argp = &data->args,
7958 .rpc_resp = &data->res,
7959 .rpc_cred = data->cred,
7960 };
7961 struct rpc_task_setup task_setup_data = {
7962 .task = &data->task,
7963 .rpc_client = NFS_CLIENT(data->args.inode),
7964 .rpc_message = &msg,
7965 .callback_ops = &nfs4_layoutcommit_ops,
7966 .callback_data = data,
7967 .flags = RPC_TASK_ASYNC,
7968 };
7969 struct rpc_task *task;
7970 int status = 0;
7971
7972 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7973 "lbw: %llu inode %lu\n",
7974 data->task.tk_pid, sync,
7975 data->args.lastbytewritten,
7976 data->args.inode->i_ino);
7977
a9c92d6b 7978 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7979 task = rpc_run_task(&task_setup_data);
7980 if (IS_ERR(task))
7981 return PTR_ERR(task);
ef311537 7982 if (sync == false)
863a3c6c
AA		 7983 goto out;
7984 status = nfs4_wait_for_completion_rpc_task(task);
7985 if (status != 0)
7986 goto out;
7987 status = task->tk_status;
1037e6ea 7988 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7989out:
7990 dprintk("%s: status %d\n", __func__, status);
7991 rpc_put_task(task);
7992 return status;
7993}
fca78d6d 7994
97431204
AA		 7995/**
7996 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7997 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7998 */
fca78d6d
BS		 7999static int
8000_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8001 struct nfs_fsinfo *info,
8002 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8003{
8004 struct nfs41_secinfo_no_name_args args = {
8005 .style = SECINFO_STYLE_CURRENT_FH,
8006 };
8007 struct nfs4_secinfo_res res = {
8008 .flavors = flavors,
8009 };
8010 struct rpc_message msg = {
8011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8012 .rpc_argp = &args,
8013 .rpc_resp = &res,
8014 };
b1b3e136 8015 struct rpc_clnt *clnt = server->client;
7cb852df 8016 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8017 int status;
8018
8019 if (use_integrity) {
8020 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8021 cred = nfs4_get_clid_cred(server->nfs_client);
8022 msg.rpc_cred = cred;
b1b3e136
WAA		 8023 }
8024
8025 dprintk("--> %s\n", __func__);
8026 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8027 &res.seq_res, 0);
8028 dprintk("<-- %s status=%d\n", __func__, status);
8029
7cb852df
WAA		 8030 if (cred)
8031 put_rpccred(cred);
b1b3e136
WAA		 8032
8033 return status;
fca78d6d
BS		 8034}
8035
8036static int
8037nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8038 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8039{
8040 struct nfs4_exception exception = { };
8041 int err;
8042 do {
b1b3e136
WAA		 8043 /* first try using integrity protection */
8044 err = -NFS4ERR_WRONGSEC;
8045
8046 /* try to use integrity protection with machine cred */
8047 if (_nfs4_is_integrity_protected(server->nfs_client))
8048 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8049 flavors, true);
8050
8051 /*
8052 * if unable to use integrity protection, or SECINFO with
8053 * integrity protection returns NFS4ERR_WRONGSEC (which is
8054 * disallowed by spec, but exists in deployed servers) use
8055 * the current filesystem's rpc_client and the user cred.
8056 */
8057 if (err == -NFS4ERR_WRONGSEC)
8058 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8059 flavors, false);
8060
fca78d6d
BS		 8061 switch (err) {
8062 case 0:
8063 case -NFS4ERR_WRONGSEC:
78b19bae 8064 case -ENOTSUPP:
05e9cfb4 8065 goto out;
fca78d6d
BS		 8066 default:
8067 err = nfs4_handle_exception(server, err, &exception);
8068 }
8069 } while (exception.retry);
05e9cfb4 8070out:
fca78d6d
BS		 8071 return err;
8072}
8073
8074static int
8075nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8076 struct nfs_fsinfo *info)
8077{
8078 int err;
8079 struct page *page;
367156d9 8080 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8081 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8082 struct nfs4_secinfo4 *secinfo;
8083 int i;
fca78d6d
BS		 8084
8085 page = alloc_page(GFP_KERNEL);
8086 if (!page) {
8087 err = -ENOMEM;
8088 goto out;
8089 }
8090
8091 flavors = page_address(page);
8092 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8093
8094 /*
8095 * Fall back on "guess and check" method if
8096 * the server doesn't support SECINFO_NO_NAME
8097 */
78b19bae 8098 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8099 err = nfs4_find_root_sec(server, fhandle, info);
8100 goto out_freepage;
8101 }
8102 if (err)
8103 goto out_freepage;
8104
58a8cf12
WAA		 8105 for (i = 0; i < flavors->num_flavors; i++) {
8106 secinfo = &flavors->flavors[i];
8107
8108 switch (secinfo->flavor) {
8109 case RPC_AUTH_NULL:
8110 case RPC_AUTH_UNIX:
8111 case RPC_AUTH_GSS:
8112 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8113 &secinfo->flavor_info);
8114 break;
8115 default:
8116 flavor = RPC_AUTH_MAXFLAVOR;
8117 break;
8118 }
8119
4d4b69dd
WAA		 8120 if (!nfs_auth_info_match(&server->auth_info, flavor))
8121 flavor = RPC_AUTH_MAXFLAVOR;
8122
58a8cf12
WAA		 8123 if (flavor != RPC_AUTH_MAXFLAVOR) {
8124 err = nfs4_lookup_root_sec(server, fhandle,
8125 info, flavor);
8126 if (!err)
8127 break;
8128 }
8129 }
8130
8131 if (flavor == RPC_AUTH_MAXFLAVOR)
8132 err = -EPERM;
fca78d6d
BS		 8133
8134out_freepage:
8135 put_page(page);
8136 if (err == -EACCES)
8137 return -EPERM;
8138out:
8139 return err;
8140}
1cab0652 8141
ab7cb0df
TM		 8142static int _nfs41_test_stateid(struct nfs_server *server,
8143 nfs4_stateid *stateid,
8144 struct rpc_cred *cred)
7d974794
BS		 8145{
8146 int status;
8147 struct nfs41_test_stateid_args args = {
1cab0652 8148 .stateid = stateid,
7d974794
BS		 8149 };
8150 struct nfs41_test_stateid_res res;
8151 struct rpc_message msg = {
8152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8153 .rpc_argp = &args,
8154 .rpc_resp = &res,
ab7cb0df 8155 .rpc_cred = cred,
7d974794 8156 };
3787d506
WAA		 8157 struct rpc_clnt *rpc_client = server->client;
8158
8159 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8160 &rpc_client, &msg);
1cab0652 8161
38527b15 8162 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8163 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8164 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8165 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8166 &args.seq_args, &res.seq_res);
38527b15
CL		 8167 if (status != NFS_OK) {
8168 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8169 return status;
38527b15
CL		 8170 }
8171 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8172 return -res.status;
7d974794
BS		 8173}
8174
38527b15
CL		 8175/**
8176 * nfs41_test_stateid - perform a TEST_STATEID operation
8177 *
8178 * @server: server / transport on which to perform the operation
8179 * @stateid: state ID to test
ab7cb0df 8180 * @cred: credential
38527b15
CL		 8181 *
8182 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8183 * Otherwise a negative NFS4ERR value is returned if the operation
8184 * failed or the state ID is not currently valid.
8185 */
ab7cb0df
TM		 8186static int nfs41_test_stateid(struct nfs_server *server,
8187 nfs4_stateid *stateid,
8188 struct rpc_cred *cred)
7d974794
BS		 8189{
8190 struct nfs4_exception exception = { };
8191 int err;
8192 do {
ab7cb0df 8193 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8194 if (err != -NFS4ERR_DELAY)
8195 break;
8196 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8197 } while (exception.retry);
8198 return err;
8199}
9aeda35f 8200
7c1d5fae
TM		 8201struct nfs_free_stateid_data {
8202 struct nfs_server *server;
8203 struct nfs41_free_stateid_args args;
9aeda35f 8204 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8205};
8206
8207static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8208{
8209 struct nfs_free_stateid_data *data = calldata;
8210 nfs41_setup_sequence(nfs4_get_session(data->server),
8211 &data->args.seq_args,
8212 &data->res.seq_res,
8213 task);
8214}
8215
8216static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8217{
8218 struct nfs_free_stateid_data *data = calldata;
8219
8220 nfs41_sequence_done(task, &data->res.seq_res);
8221
8222 switch (task->tk_status) {
8223 case -NFS4ERR_DELAY:
8224 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8225 rpc_restart_call_prepare(task);
8226 }
8227}
8228
8229static void nfs41_free_stateid_release(void *calldata)
8230{
8231 kfree(calldata);
8232}
8233
17f26b12 8234static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8235 .rpc_call_prepare = nfs41_free_stateid_prepare,
8236 .rpc_call_done = nfs41_free_stateid_done,
8237 .rpc_release = nfs41_free_stateid_release,
8238};
8239
8240static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8241 nfs4_stateid *stateid,
ab7cb0df 8242 struct rpc_cred *cred,
7c1d5fae
TM		 8243 bool privileged)
8244{
9aeda35f
BS		 8245 struct rpc_message msg = {
8246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8247 .rpc_cred = cred,
9aeda35f 8248 };
7c1d5fae
TM		 8249 struct rpc_task_setup task_setup = {
8250 .rpc_client = server->client,
8251 .rpc_message = &msg,
8252 .callback_ops = &nfs41_free_stateid_ops,
8253 .flags = RPC_TASK_ASYNC,
8254 };
8255 struct nfs_free_stateid_data *data;
9aeda35f 8256
3787d506
WAA		 8257 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8258 &task_setup.rpc_client, &msg);
8259
38527b15 8260 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8261 data = kmalloc(sizeof(*data), GFP_NOFS);
8262 if (!data)
8263 return ERR_PTR(-ENOMEM);
8264 data->server = server;
8265 nfs4_stateid_copy(&data->args.stateid, stateid);
8266
8267 task_setup.callback_data = data;
8268
8269 msg.rpc_argp = &data->args;
8270 msg.rpc_resp = &data->res;
a9c92d6b 8271 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8272 if (privileged)
8273 nfs4_set_sequence_privileged(&data->args.seq_args);
8274
8275 return rpc_run_task(&task_setup);
9aeda35f
BS		 8276}
8277
38527b15
CL		 8278/**
8279 * nfs41_free_stateid - perform a FREE_STATEID operation
8280 *
8281 * @server: server / transport on which to perform the operation
8282 * @stateid: state ID to release
ab7cb0df 8283 * @cred: credential
38527b15
CL		 8284 *
8285 * Returns NFS_OK if the server freed "stateid". Otherwise a
8286 * negative NFS4ERR value is returned.
8287 */
ab7cb0df
TM		 8288static int nfs41_free_stateid(struct nfs_server *server,
8289 nfs4_stateid *stateid,
8290 struct rpc_cred *cred)
9aeda35f 8291{
7c1d5fae
TM		 8292 struct rpc_task *task;
8293 int ret;
8294
ab7cb0df 8295 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8296 if (IS_ERR(task))
8297 return PTR_ERR(task);
8298 ret = rpc_wait_for_completion_task(task);
8299 if (!ret)
8300 ret = task->tk_status;
8301 rpc_put_task(task);
8302 return ret;
9aeda35f 8303}
36281caa 8304
f1cdae87
JL		 8305static void
8306nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8307{
8308 struct rpc_task *task;
ab7cb0df 8309 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8310
ab7cb0df 8311 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8312 nfs4_free_lock_state(server, lsp);
8313 if (IS_ERR(task))
f1cdae87 8314 return;
c8b2d0bf 8315 rpc_put_task(task);
c8b2d0bf
TM		 8316}
8317
36281caa
TM		 8318static bool nfs41_match_stateid(const nfs4_stateid *s1,
8319 const nfs4_stateid *s2)
8320{
2d2f24ad 8321 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8322 return false;
8323
2d2f24ad 8324 if (s1->seqid == s2->seqid)
36281caa 8325 return true;
2d2f24ad 8326 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8327 return true;
8328
8329 return false;
8330}
8331
557134a3
AA		 8332#endif /* CONFIG_NFS_V4_1 */
8333
36281caa
TM		 8334static bool nfs4_match_stateid(const nfs4_stateid *s1,
8335 const nfs4_stateid *s2)
8336{
f597c537 8337 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8338}
8339
8340
17280175 8341static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8342 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8343 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8344 .recover_open = nfs4_open_reclaim,
8345 .recover_lock = nfs4_lock_reclaim,
591d71cb 8346 .establish_clid = nfs4_init_clientid,
05f4c350 8347 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8348};
8349
591d71cb 8350#if defined(CONFIG_NFS_V4_1)
17280175 8351static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8352 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8353 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8354 .recover_open = nfs4_open_reclaim,
8355 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8356 .establish_clid = nfs41_init_clientid,
fce5c838 8357 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8358 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8359};
8360#endif /* CONFIG_NFS_V4_1 */
8361
17280175 8362static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8363 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8364 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8365 .recover_open = nfs4_open_expired,
8366 .recover_lock = nfs4_lock_expired,
8367 .establish_clid = nfs4_init_clientid,
8368};
8369
8370#if defined(CONFIG_NFS_V4_1)
17280175 8371static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8372 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8373 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8374 .recover_open = nfs41_open_expired,
8375 .recover_lock = nfs41_lock_expired,
4d643d1d 8376 .establish_clid = nfs41_init_clientid,
1da177e4 8377};
591d71cb 8378#endif /* CONFIG_NFS_V4_1 */
1da177e4 8379
17280175 8380static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8381 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8382 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8383 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8384};
8385
8386#if defined(CONFIG_NFS_V4_1)
17280175 8387static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8388 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8389 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8390 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8391};
8392#endif
8393
ec011fe8 8394static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8395 .get_locations = _nfs40_proc_get_locations,
44c99933 8396 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8397};
8398
8399#if defined(CONFIG_NFS_V4_1)
8400static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8401 .get_locations = _nfs41_proc_get_locations,
44c99933 8402 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8403};
8404#endif /* CONFIG_NFS_V4_1 */
8405
97dc1359
TM		 8406static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8407 .minor_version = 0,
39c6daae
TM		 8408 .init_caps = NFS_CAP_READDIRPLUS
8409 | NFS_CAP_ATOMIC_OPEN
8410 | NFS_CAP_CHANGE_ATTR
8411 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8412 .init_client = nfs40_init_client,
8413 .shutdown_client = nfs40_shutdown_client,
36281caa 8414 .match_stateid = nfs4_match_stateid,
fca78d6d 8415 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8416 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8417 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8418 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8419 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8420 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8421 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8422};
8423
8424#if defined(CONFIG_NFS_V4_1)
8425static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8426 .minor_version = 1,
39c6daae
TM		 8427 .init_caps = NFS_CAP_READDIRPLUS
8428 | NFS_CAP_ATOMIC_OPEN
8429 | NFS_CAP_CHANGE_ATTR
3b66486c 8430 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8431 | NFS_CAP_STATEID_NFSV41
8432 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8433 .init_client = nfs41_init_client,
8434 .shutdown_client = nfs41_shutdown_client,
36281caa 8435 .match_stateid = nfs41_match_stateid,
fca78d6d 8436 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8437 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8438 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8439 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8440 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8441 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8442 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8443};
8444#endif
8445
42c2c424
SD		 8446#if defined(CONFIG_NFS_V4_2)
8447static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8448 .minor_version = 2,
7017310a
BS		 8449 .init_caps = NFS_CAP_READDIRPLUS
8450 | NFS_CAP_ATOMIC_OPEN
8451 | NFS_CAP_CHANGE_ATTR
8452 | NFS_CAP_POSIX_LOCK
8453 | NFS_CAP_STATEID_NFSV41
8454 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8455 .init_client = nfs41_init_client,
8456 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8457 .match_stateid = nfs41_match_stateid,
8458 .find_root_sec = nfs41_find_root_sec,
7017310a 8459 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8460 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8461 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8462 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8463 .state_renewal_ops = &nfs41_state_renewal_ops,
8464};
8465#endif
8466
97dc1359
TM		 8467const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8468 [0] = &nfs_v4_0_minor_ops,
8469#if defined(CONFIG_NFS_V4_1)
8470 [1] = &nfs_v4_1_minor_ops,
8471#endif
42c2c424
SD		 8472#if defined(CONFIG_NFS_V4_2)
8473 [2] = &nfs_v4_2_minor_ops,
8474#endif
97dc1359
TM		 8475};
8476
17f26b12 8477static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8478 .create = nfs_create,
8479 .lookup = nfs_lookup,
8480 .atomic_open = nfs_atomic_open,
8481 .link = nfs_link,
8482 .unlink = nfs_unlink,
8483 .symlink = nfs_symlink,
8484 .mkdir = nfs_mkdir,
8485 .rmdir = nfs_rmdir,
8486 .mknod = nfs_mknod,
8487 .rename = nfs_rename,
8488 .permission = nfs_permission,
8489 .getattr = nfs_getattr,
8490 .setattr = nfs_setattr,
8491 .getxattr = generic_getxattr,
8492 .setxattr = generic_setxattr,
8493 .listxattr = generic_listxattr,
8494 .removexattr = generic_removexattr,
8495};
8496
92e1d5be 8497static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8498 .permission = nfs_permission,
8499 .getattr = nfs_getattr,
8500 .setattr = nfs_setattr,
64c2ce8b
AK		 8501 .getxattr = generic_getxattr,
8502 .setxattr = generic_setxattr,
8503 .listxattr = generic_listxattr,
8504 .removexattr = generic_removexattr,
6b3b5496
BF		 8505};
8506
509de811 8507const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8508 .version = 4, /* protocol version */
8509 .dentry_ops = &nfs4_dentry_operations,
8510 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8511 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8512 .file_ops = &nfs4_file_operations,
1da177e4 8513 .getroot = nfs4_proc_get_root,
281cad46 8514 .submount = nfs4_submount,
ff9099f2 8515 .try_mount = nfs4_try_mount,
1da177e4
LT		 8516 .getattr = nfs4_proc_getattr,
8517 .setattr = nfs4_proc_setattr,
8518 .lookup = nfs4_proc_lookup,
8519 .access = nfs4_proc_access,
8520 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8521 .create = nfs4_proc_create,
8522 .remove = nfs4_proc_remove,
8523 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8524 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8525 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8526 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8527 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8528 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8529 .link = nfs4_proc_link,
8530 .symlink = nfs4_proc_symlink,
8531 .mkdir = nfs4_proc_mkdir,
8532 .rmdir = nfs4_proc_remove,
8533 .readdir = nfs4_proc_readdir,
8534 .mknod = nfs4_proc_mknod,
8535 .statfs = nfs4_proc_statfs,
8536 .fsinfo = nfs4_proc_fsinfo,
8537 .pathconf = nfs4_proc_pathconf,
e9326dca 8538 .set_capabilities = nfs4_server_capabilities,
1da177e4 8539 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8540 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8541 .read_setup = nfs4_proc_read_setup,
ec06c096 8542 .read_done = nfs4_read_done,
1da177e4 8543 .write_setup = nfs4_proc_write_setup,
788e7a89 8544 .write_done = nfs4_write_done,
1da177e4 8545 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8546 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8547 .commit_done = nfs4_commit_done,
1da177e4 8548 .lock = nfs4_proc_lock,
e50a1c2e 8549 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8550 .close_context = nfs4_close_context,
2b484297 8551 .open_context = nfs4_atomic_open,
011e2a7f 8552 .have_delegation = nfs4_have_delegation,
57ec14c5 8553 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8554 .alloc_client = nfs4_alloc_client,
45a52a02 8555 .init_client = nfs4_init_client,
cdb7eced 8556 .free_client = nfs4_free_client,
1179acc6
BS		 8557 .create_server = nfs4_create_server,
8558 .clone_server = nfs_clone_server,
1da177e4
LT		 8559};
8560
64c2ce8b
AK		 8561static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8562 .prefix = XATTR_NAME_NFSV4_ACL,
8563 .list = nfs4_xattr_list_nfs4_acl,
8564 .get = nfs4_xattr_get_nfs4_acl,
8565 .set = nfs4_xattr_set_nfs4_acl,
8566};
8567
8568const struct xattr_handler *nfs4_xattr_handlers[] = {
8569 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8570#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8571 &nfs4_xattr_nfs4_label_handler,
8572#endif
64c2ce8b
AK		 8573 NULL
8574};
8575
1da177e4
LT		 8576/*
8577 * Local variables:
8578 * c-basic-offset: 8
8579 * End:
8580 */
Linux 6.x block layer and io_uring tree(s)