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NFS: Fix infinite loop in gss_create_upcall()
[mirror_ubuntu-artful-kernel.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>
5a0e3ad6 42#include <linux/slab.h>
1da177e4 43#include <linux/sunrpc/clnt.h>
8f70e95f 44#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
1da177e4 49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
99fe60d0 51#include <linux/module.h>
5a0ffe54 52#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 53#include <linux/xattr.h>
c7a360b0 54#include <linux/utsname.h>
1da177e4 55
4ce79717 56#include "nfs4_fs.h"
1da177e4 57#include "delegation.h"
101070ca 58#include "internal.h"
006ea73e 59#include "iostat.h"
fc931582 60#include "callback.h"
b1f69b75 61#include "pnfs.h"
1da177e4
LT		 62
63#define NFSDBG_FACILITY NFSDBG_PROC
64
2066fe89 65#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 66#define NFS4_POLL_RETRY_MAX (15*HZ)
67
a78cb57a
TM		 68#define NFS4_MAX_LOOP_ON_RECOVER (10)
69
cdd4e68b 70struct nfs4_opendata;
864472e9 71static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 72static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 73static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 74static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
7c513058
BS		 75static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
76 const struct qstr *name, struct nfs_fh *fhandle,
77 struct nfs_fattr *fattr);
9936781d 78static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 79static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
80 struct nfs_fattr *fattr, struct iattr *sattr,
81 struct nfs4_state *state);
1da177e4 82
1da177e4 83/* Prevent leaks of NFSv4 errors into userland */
46f72f57 84static int nfs4_map_errors(int err)
1da177e4 85{
52567b03
TM		 86 if (err >= -1000)
87 return err;
88 switch (err) {
89 case -NFS4ERR_RESOURCE:
90 return -EREMOTEIO;
7ebb9315
BS		 91 case -NFS4ERR_WRONGSEC:
92 return -EPERM;
3ddeb7c5
TM		 93 case -NFS4ERR_BADOWNER:
94 case -NFS4ERR_BADNAME:
95 return -EINVAL;
52567b03 96 default:
1da177e4 97 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 98 __func__, -err);
52567b03 99 break;
1da177e4 100 }
52567b03 101 return -EIO;
1da177e4
LT		 102}
103
104/*
105 * This is our standard bitmap for GETATTR requests.
106 */
107const u32 nfs4_fattr_bitmap[2] = {
108 FATTR4_WORD0_TYPE
109 | FATTR4_WORD0_CHANGE
110 | FATTR4_WORD0_SIZE
111 | FATTR4_WORD0_FSID
112 | FATTR4_WORD0_FILEID,
113 FATTR4_WORD1_MODE
114 | FATTR4_WORD1_NUMLINKS
115 | FATTR4_WORD1_OWNER
116 | FATTR4_WORD1_OWNER_GROUP
117 | FATTR4_WORD1_RAWDEV
118 | FATTR4_WORD1_SPACE_USED
119 | FATTR4_WORD1_TIME_ACCESS
120 | FATTR4_WORD1_TIME_METADATA
121 | FATTR4_WORD1_TIME_MODIFY
122};
123
124const u32 nfs4_statfs_bitmap[2] = {
125 FATTR4_WORD0_FILES_AVAIL
126 | FATTR4_WORD0_FILES_FREE
127 | FATTR4_WORD0_FILES_TOTAL,
128 FATTR4_WORD1_SPACE_AVAIL
129 | FATTR4_WORD1_SPACE_FREE
130 | FATTR4_WORD1_SPACE_TOTAL
131};
132
4ce79717 133const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 134 FATTR4_WORD0_MAXLINK
135 | FATTR4_WORD0_MAXNAME,
136 0
137};
138
139const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
140 | FATTR4_WORD0_MAXREAD
141 | FATTR4_WORD0_MAXWRITE
142 | FATTR4_WORD0_LEASE_TIME,
55b6e774 143 FATTR4_WORD1_TIME_DELTA
504913fb 144 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 145};
146
830b8e33
MN		 147const u32 nfs4_fs_locations_bitmap[2] = {
148 FATTR4_WORD0_TYPE
149 | FATTR4_WORD0_CHANGE
150 | FATTR4_WORD0_SIZE
151 | FATTR4_WORD0_FSID
152 | FATTR4_WORD0_FILEID
153 | FATTR4_WORD0_FS_LOCATIONS,
154 FATTR4_WORD1_MODE
155 | FATTR4_WORD1_NUMLINKS
156 | FATTR4_WORD1_OWNER
157 | FATTR4_WORD1_OWNER_GROUP
158 | FATTR4_WORD1_RAWDEV
159 | FATTR4_WORD1_SPACE_USED
160 | FATTR4_WORD1_TIME_ACCESS
161 | FATTR4_WORD1_TIME_METADATA
162 | FATTR4_WORD1_TIME_MODIFY
163 | FATTR4_WORD1_MOUNTED_ON_FILEID
164};
165
bc4785cd 166static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 167 struct nfs4_readdir_arg *readdir)
168{
0dbb4c67 169 __be32 *start, *p;
1da177e4
LT		 170
171 BUG_ON(readdir->count < 80);
172 if (cookie > 2) {
b7ef1956 173 readdir->cookie = cookie;
1da177e4
LT		 174 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
175 return;
176 }
177
178 readdir->cookie = 0;
179 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
180 if (cookie == 2)
181 return;
182
183 /*
184 * NFSv4 servers do not return entries for '.' and '..'
185 * Therefore, we fake these entries here. We let '.'
186 * have cookie 0 and '..' have cookie 1. Note that
187 * when talking to the server, we always send cookie 0
188 * instead of 1 or 2.
189 */
0dbb4c67 190 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 191
192 if (cookie == 0) {
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_one; /* cookie, second word */
196 *p++ = xdr_one; /* entry len */
197 memcpy(p, ".\0\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 203 }
204
205 *p++ = xdr_one; /* next */
206 *p++ = xdr_zero; /* cookie, first word */
207 *p++ = xdr_two; /* cookie, second word */
208 *p++ = xdr_two; /* entry len */
209 memcpy(p, "..\0\0", 4); /* entry */
210 p++;
211 *p++ = xdr_one; /* bitmap length */
212 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
213 *p++ = htonl(8); /* attribute buffer length */
4e769b93 214 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 215
216 readdir->pgbase = (char *)p - (char *)start;
217 readdir->count -= readdir->pgbase;
218 kunmap_atomic(start, KM_USER0);
219}
220
65de872e
TM		 221static int nfs4_wait_clnt_recover(struct nfs_client *clp)
222{
223 int res;
224
225 might_sleep();
226
e005e804 227 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 228 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 229 return res;
230}
231
232static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
233{
234 int res = 0;
235
236 might_sleep();
237
238 if (*timeout <= 0)
239 *timeout = NFS4_POLL_RETRY_MIN;
240 if (*timeout > NFS4_POLL_RETRY_MAX)
241 *timeout = NFS4_POLL_RETRY_MAX;
242 schedule_timeout_killable(*timeout);
243 if (fatal_signal_pending(current))
244 res = -ERESTARTSYS;
245 *timeout <<= 1;
246 return res;
247}
248
249/* This is the error handling routine for processes that are allowed
250 * to sleep.
251 */
b064eca2 252static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 253{
254 struct nfs_client *clp = server->nfs_client;
9e33bed5 255 struct nfs4_state *state = exception->state;
65de872e
TM		 256 int ret = errorcode;
257
258 exception->retry = 0;
259 switch(errorcode) {
260 case 0:
261 return 0;
9e33bed5
TM		 262 case -NFS4ERR_ADMIN_REVOKED:
263 case -NFS4ERR_BAD_STATEID:
264 case -NFS4ERR_OPENMODE:
265 if (state == NULL)
266 break;
0400a6b0
TM		 267 nfs4_schedule_stateid_recovery(server, state);
268 goto wait_on_recovery;
65de872e 269 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 270 case -NFS4ERR_STALE_CLIENTID:
65de872e 271 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 272 nfs4_schedule_lease_recovery(clp);
273 goto wait_on_recovery;
03391693 274#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 275 case -NFS4ERR_BADSESSION:
276 case -NFS4ERR_BADSLOT:
277 case -NFS4ERR_BAD_HIGH_SLOT:
278 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
279 case -NFS4ERR_DEADSESSION:
280 case -NFS4ERR_SEQ_FALSE_RETRY:
281 case -NFS4ERR_SEQ_MISORDERED:
282 dprintk("%s ERROR: %d Reset session\n", __func__,
283 errorcode);
0400a6b0 284 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 285 exception->retry = 1;
b9179237 286 break;
03391693 287#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 288 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 289 if (exception->timeout > HZ) {
290 /* We have retried a decent amount, time to
291 * fail
292 */
293 ret = -EBUSY;
294 break;
295 }
65de872e
TM		 296 case -NFS4ERR_GRACE:
297 case -NFS4ERR_DELAY:
2c643488 298 case -EKEYEXPIRED:
65de872e
TM		 299 ret = nfs4_delay(server->client, &exception->timeout);
300 if (ret != 0)
301 break;
302 case -NFS4ERR_OLD_STATEID:
303 exception->retry = 1;
b064eca2
TM		 304 break;
305 case -NFS4ERR_BADOWNER:
306 /* The following works around a Linux server bug! */
307 case -NFS4ERR_BADNAME:
308 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
309 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
310 exception->retry = 1;
311 printk(KERN_WARNING "NFS: v4 server %s "
312 "does not accept raw "
313 "uid/gids. "
314 "Reenabling the idmapper.\n",
315 server->nfs_client->cl_hostname);
316 }
65de872e
TM		 317 }
318 /* We failed to handle the error */
319 return nfs4_map_errors(ret);
0400a6b0 320wait_on_recovery:
a2c0b9e2
TM		 321 ret = nfs4_wait_clnt_recover(clp);
322 if (ret == 0)
323 exception->retry = 1;
324 return ret;
65de872e
TM		 325}
326
327
452e9352 328static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 329{
1da177e4
LT		 330 spin_lock(&clp->cl_lock);
331 if (time_before(clp->cl_last_renewal,timestamp))
332 clp->cl_last_renewal = timestamp;
333 spin_unlock(&clp->cl_lock);
334}
335
452e9352
TM		 336static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
337{
338 do_renew_lease(server->nfs_client, timestamp);
339}
340
cccef3b9
AA		 341#if defined(CONFIG_NFS_V4_1)
342
e2c4ab3c
AA		 343/*
344 * nfs4_free_slot - free a slot and efficiently update slot table.
345 *
346 * freeing a slot is trivially done by clearing its respective bit
347 * in the bitmap.
348 * If the freed slotid equals highest_used_slotid we want to update it
349 * so that the server would be able to size down the slot table if needed,
350 * otherwise we know that the highest_used_slotid is still in use.
351 * When updating highest_used_slotid there may be "holes" in the bitmap
352 * so we need to scan down from highest_used_slotid to 0 looking for the now
353 * highest slotid in use.
354 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 355 *
356 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 357 */
358static void
dfb4f309 359nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 360{
dfb4f309 361 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 362 int slotid = free_slotid;
363
dfb4f309 364 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 365 /* clear used bit in bitmap */
366 __clear_bit(slotid, tbl->used_slots);
367
368 /* update highest_used_slotid when it is freed */
369 if (slotid == tbl->highest_used_slotid) {
370 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 371 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 372 tbl->highest_used_slotid = slotid;
373 else
374 tbl->highest_used_slotid = -1;
375 }
e2c4ab3c
AA		 376 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
377 free_slotid, tbl->highest_used_slotid);
378}
379
3bfb0fc5 380/*
42acd021 381 * Signal state manager thread if session fore channel is drained
3bfb0fc5 382 */
42acd021 383static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 384{
689cf5c1
AB		 385 struct rpc_task *task;
386
a2118c33 387 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 388 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
389 if (task)
390 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 391 return;
392 }
393
394 if (ses->fc_slot_table.highest_used_slotid != -1)
395 return;
396
42acd021
AA		 397 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
398 complete(&ses->fc_slot_table.complete);
399}
400
401/*
402 * Signal state manager thread if session back channel is drained
403 */
404void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
405{
406 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
407 ses->bc_slot_table.highest_used_slotid != -1)
408 return;
409 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
410 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 411}
412
d185a334 413static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 414{
415 struct nfs4_slot_table *tbl;
416
d185a334 417 tbl = &res->sr_session->fc_slot_table;
dfb4f309 418 if (!res->sr_slot) {
13615871
AA		 419 /* just wake up the next guy waiting since
420 * we may have not consumed a slot after all */
691daf3b 421 dprintk("%s: No slot\n", __func__);
35dc1d74 422 return;
13615871 423 }
ea028ac9 424
35dc1d74 425 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 426 nfs4_free_slot(tbl, res->sr_slot);
42acd021 427 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 428 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 429 res->sr_slot = NULL;
13615871
AA		 430}
431
14516c3a 432static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 433{
434 unsigned long timestamp;
14516c3a 435 struct nfs_client *clp;
b0df806c
AA		 436
437 /*
438 * sr_status remains 1 if an RPC level error occurred. The server
439 * may or may not have processed the sequence operation..
440 * Proceed as if the server received and processed the sequence
441 * operation.
442 */
443 if (res->sr_status == 1)
444 res->sr_status = NFS_OK;
445
446 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 447 if (!res->sr_slot)
b0df806c
AA		 448 goto out;
449
691daf3b 450 /* Check the SEQUENCE operation status */
14516c3a
TM		 451 switch (res->sr_status) {
452 case 0:
b0df806c 453 /* Update the slot's sequence and clientid lease timer */
dfb4f309 454 ++res->sr_slot->seq_nr;
b0df806c 455 timestamp = res->sr_renewal_time;
14516c3a 456 clp = res->sr_session->clp;
452e9352 457 do_renew_lease(clp, timestamp);
0629e370 458 /* Check sequence flags */
b4410c2f
TM		 459 if (res->sr_status_flags != 0)
460 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 461 break;
462 case -NFS4ERR_DELAY:
463 /* The server detected a resend of the RPC call and
464 * returned NFS4ERR_DELAY as per Section 2.10.6.2
465 * of RFC5661.
466 */
12364a4f 467 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 468 __func__,
469 res->sr_slot - res->sr_session->fc_slot_table.slots,
470 res->sr_slot->seq_nr);
14516c3a
TM		 471 goto out_retry;
472 default:
473 /* Just update the slot sequence no. */
dfb4f309 474 ++res->sr_slot->seq_nr;
b0df806c
AA		 475 }
476out:
477 /* The session may be reset by one of the error handlers. */
478 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 479 nfs41_sequence_free_slot(res);
14516c3a
TM		 480 return 1;
481out_retry:
d05dd4e9 482 if (!rpc_restart_call(task))
14516c3a
TM		 483 goto out;
484 rpc_delay(task, NFS4_POLL_RETRY_MAX);
485 return 0;
b0df806c
AA		 486}
487
14516c3a
TM		 488static int nfs4_sequence_done(struct rpc_task *task,
489 struct nfs4_sequence_res *res)
df896455 490{
14516c3a
TM		 491 if (res->sr_session == NULL)
492 return 1;
493 return nfs41_sequence_done(task, res);
df896455
TM		 494}
495
510b8175
BH		 496/*
497 * nfs4_find_slot - efficiently look for a free slot
498 *
499 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
500 * If found, we mark the slot as used, update the highest_used_slotid,
501 * and respectively set up the sequence operation args.
502 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 503 *
504 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 505 */
506static u8
40ead580 507nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 508{
509 int slotid;
510 u8 ret_id = NFS4_MAX_SLOT_TABLE;
511 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
512
510b8175
BH		 513 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
514 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
515 tbl->max_slots);
516 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
517 if (slotid >= tbl->max_slots)
518 goto out;
519 __set_bit(slotid, tbl->used_slots);
520 if (slotid > tbl->highest_used_slotid)
521 tbl->highest_used_slotid = slotid;
522 ret_id = slotid;
523out:
524 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
525 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 526 return ret_id;
527}
528
dc70d7b3 529int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 530 struct nfs4_sequence_args *args,
531 struct nfs4_sequence_res *res,
532 int cache_reply,
533 struct rpc_task *task)
534{
fbcd4abc
AA		 535 struct nfs4_slot *slot;
536 struct nfs4_slot_table *tbl;
537 u8 slotid;
538
539 dprintk("--> %s\n", __func__);
ce5039c1 540 /* slot already allocated? */
dfb4f309 541 if (res->sr_slot != NULL)
ce5039c1
AA		 542 return 0;
543
fbcd4abc
AA		 544 tbl = &session->fc_slot_table;
545
546 spin_lock(&tbl->slot_tbl_lock);
a2118c33 547 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 548 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 549 /*
550 * The state manager will wait until the slot table is empty.
551 * Schedule the reset thread
552 */
05f0d236 553 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 554 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 555 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 556 return -EAGAIN;
b069d94a
AA		 557 }
558
689cf5c1
AB		 559 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
560 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
561 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
562 spin_unlock(&tbl->slot_tbl_lock);
563 dprintk("%s enforce FIFO order\n", __func__);
564 return -EAGAIN;
565 }
566
40ead580 567 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 568 if (slotid == NFS4_MAX_SLOT_TABLE) {
569 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
570 spin_unlock(&tbl->slot_tbl_lock);
571 dprintk("<-- %s: no free slots\n", __func__);
572 return -EAGAIN;
573 }
574 spin_unlock(&tbl->slot_tbl_lock);
575
689cf5c1 576 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 577 slot = tbl->slots + slotid;
99fe60d0 578 args->sa_session = session;
fbcd4abc
AA		 579 args->sa_slotid = slotid;
580 args->sa_cache_this = cache_reply;
581
582 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
583
99fe60d0 584 res->sr_session = session;
dfb4f309 585 res->sr_slot = slot;
fbcd4abc 586 res->sr_renewal_time = jiffies;
2a6e26cd 587 res->sr_status_flags = 0;
fbcd4abc
AA		 588 /*
589 * sr_status is only set in decode_sequence, and so will remain
590 * set to 1 if an rpc level failure occurs.
591 */
592 res->sr_status = 1;
ce5039c1
AA		 593 return 0;
594}
dc70d7b3 595EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 596
035168ab 597int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 598 struct nfs4_sequence_args *args,
599 struct nfs4_sequence_res *res,
600 int cache_reply,
601 struct rpc_task *task)
602{
035168ab 603 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 604 int ret = 0;
605
035168ab
TM		 606 if (session == NULL) {
607 args->sa_session = NULL;
608 res->sr_session = NULL;
609 goto out;
610 }
611
12364a4f 612 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 613 __func__, session->clp, session, res->sr_slot ?
614 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 615
035168ab 616 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 617 task);
ce5039c1
AA		 618out:
619 dprintk("<-- %s status=%d\n", __func__, ret);
620 return ret;
621}
622
623struct nfs41_call_sync_data {
035168ab 624 const struct nfs_server *seq_server;
ce5039c1
AA		 625 struct nfs4_sequence_args *seq_args;
626 struct nfs4_sequence_res *seq_res;
627 int cache_reply;
628};
629
630static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
631{
632 struct nfs41_call_sync_data *data = calldata;
633
035168ab
TM		 634 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
635
636 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 637 data->seq_res, data->cache_reply, task))
638 return;
639 rpc_call_start(task);
640}
641
b257957e
AB		 642static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
643{
644 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
645 nfs41_call_sync_prepare(task, calldata);
646}
647
69ab40c4
AA		 648static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
649{
650 struct nfs41_call_sync_data *data = calldata;
651
14516c3a 652 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 653}
654
ce5039c1
AA		 655struct rpc_call_ops nfs41_call_sync_ops = {
656 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 657 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 658};
659
b257957e
AB		 660struct rpc_call_ops nfs41_call_priv_sync_ops = {
661 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
662 .rpc_call_done = nfs41_call_sync_done,
663};
664
7c513058
BS		 665static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
666 struct nfs_server *server,
ce5039c1
AA		 667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res,
b257957e
AB		 670 int cache_reply,
671 int privileged)
ce5039c1
AA		 672{
673 int ret;
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
035168ab 676 .seq_server = server,
ce5039c1
AA		 677 .seq_args = args,
678 .seq_res = res,
679 .cache_reply = cache_reply,
680 };
681 struct rpc_task_setup task_setup = {
7c513058 682 .rpc_client = clnt,
ce5039c1
AA		 683 .rpc_message = msg,
684 .callback_ops = &nfs41_call_sync_ops,
685 .callback_data = &data
686 };
687
dfb4f309 688 res->sr_slot = NULL;
b257957e
AB		 689 if (privileged)
690 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 691 task = rpc_run_task(&task_setup);
692 if (IS_ERR(task))
693 ret = PTR_ERR(task);
694 else {
695 ret = task->tk_status;
696 rpc_put_task(task);
697 }
698 return ret;
699}
700
7c513058
BS		 701int _nfs4_call_sync_session(struct rpc_clnt *clnt,
702 struct nfs_server *server,
cccef3b9
AA		 703 struct rpc_message *msg,
704 struct nfs4_sequence_args *args,
705 struct nfs4_sequence_res *res,
706 int cache_reply)
707{
7c513058 708 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 709}
710
df896455 711#else
14516c3a
TM		 712static int nfs4_sequence_done(struct rpc_task *task,
713 struct nfs4_sequence_res *res)
df896455 714{
14516c3a 715 return 1;
df896455 716}
cccef3b9
AA		 717#endif /* CONFIG_NFS_V4_1 */
718
7c513058
BS		 719int _nfs4_call_sync(struct rpc_clnt *clnt,
720 struct nfs_server *server,
cccef3b9
AA		 721 struct rpc_message *msg,
722 struct nfs4_sequence_args *args,
723 struct nfs4_sequence_res *res,
724 int cache_reply)
725{
f3752975 726 args->sa_session = res->sr_session = NULL;
7c513058 727 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 728}
729
e73b83f2 730static inline
7c513058
BS		 731int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
e73b83f2
BS		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
736 int cache_reply)
737{
7c513058
BS		 738 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
739 args, res, cache_reply);
e73b83f2 740}
cccef3b9 741
38478b24 742static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 743{
38478b24 744 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 745
38478b24 746 spin_lock(&dir->i_lock);
40d24704
TM		 747 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
748 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 749 nfs_force_lookup_revalidate(dir);
40d24704 750 nfsi->change_attr = cinfo->after;
38478b24 751 spin_unlock(&dir->i_lock);
1da177e4
LT		 752}
753
e56e0b78 754struct nfs4_opendata {
c6d00e63 755 struct kref kref;
e56e0b78
TM		 756 struct nfs_openargs o_arg;
757 struct nfs_openres o_res;
cdd4e68b
TM		 758 struct nfs_open_confirmargs c_arg;
759 struct nfs_open_confirmres c_res;
e56e0b78
TM		 760 struct nfs_fattr f_attr;
761 struct nfs_fattr dir_attr;
ad389da7 762 struct path path;
e56e0b78
TM		 763 struct dentry *dir;
764 struct nfs4_state_owner *owner;
aac00a8d 765 struct nfs4_state *state;
e56e0b78 766 struct iattr attrs;
26e976a8 767 unsigned long timestamp;
3e309914 768 unsigned int rpc_done : 1;
24ac23ab
TM		 769 int rpc_status;
770 int cancelled;
e56e0b78
TM		 771};
772
2ced46c2
TM		 773
774static void nfs4_init_opendata_res(struct nfs4_opendata *p)
775{
776 p->o_res.f_attr = &p->f_attr;
777 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 778 p->o_res.seqid = p->o_arg.seqid;
779 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 780 p->o_res.server = p->o_arg.server;
781 nfs_fattr_init(&p->f_attr);
782 nfs_fattr_init(&p->dir_attr);
783}
784
ad389da7 785static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 786 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 787 const struct iattr *attrs,
788 gfp_t gfp_mask)
e56e0b78 789{
ad389da7 790 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 791 struct inode *dir = parent->d_inode;
792 struct nfs_server *server = NFS_SERVER(dir);
793 struct nfs4_opendata *p;
794
8535b2be 795 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 796 if (p == NULL)
797 goto err;
8535b2be 798 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 799 if (p->o_arg.seqid == NULL)
800 goto err_free;
f6948697
AV		 801 path_get(path);
802 p->path = *path;
e56e0b78
TM		 803 p->dir = parent;
804 p->owner = sp;
805 atomic_inc(&sp->so_count);
806 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 807 p->o_arg.open_flags = flags;
808 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 809 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 810 p->o_arg.id = sp->so_owner_id.id;
ad389da7 811 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 812 p->o_arg.server = server;
813 p->o_arg.bitmask = server->attr_bitmask;
814 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 815 if (flags & O_CREAT) {
816 u32 *s;
817
e56e0b78
TM		 818 p->o_arg.u.attrs = &p->attrs;
819 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 820 s = (u32 *) p->o_arg.u.verifier.data;
821 s[0] = jiffies;
822 s[1] = current->pid;
e56e0b78 823 }
cdd4e68b
TM		 824 p->c_arg.fh = &p->o_res.fh;
825 p->c_arg.stateid = &p->o_res.stateid;
826 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 827 nfs4_init_opendata_res(p);
c6d00e63 828 kref_init(&p->kref);
e56e0b78
TM		 829 return p;
830err_free:
831 kfree(p);
832err:
833 dput(parent);
834 return NULL;
835}
836
c6d00e63 837static void nfs4_opendata_free(struct kref *kref)
e56e0b78 838{
c6d00e63
TM		 839 struct nfs4_opendata *p = container_of(kref,
840 struct nfs4_opendata, kref);
841
842 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 843 if (p->state != NULL)
844 nfs4_put_open_state(p->state);
c6d00e63
TM		 845 nfs4_put_state_owner(p->owner);
846 dput(p->dir);
31f31db1 847 path_put(&p->path);
c6d00e63
TM		 848 kfree(p);
849}
850
851static void nfs4_opendata_put(struct nfs4_opendata *p)
852{
853 if (p != NULL)
854 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 855}
856
06f814a3
TM		 857static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
858{
06f814a3
TM		 859 int ret;
860
06f814a3 861 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 862 return ret;
863}
864
dc0b027d 865static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 866{
867 int ret = 0;
dc0b027d
TM		 868
869 if (open_mode & O_EXCL)
870 goto out;
871 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 872 case FMODE_READ:
88069f77
TM		 873 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
874 && state->n_rdonly != 0;
6ee41268
TM		 875 break;
876 case FMODE_WRITE:
88069f77
TM		 877 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
878 && state->n_wronly != 0;
6ee41268
TM		 879 break;
880 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 881 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
882 && state->n_rdwr != 0;
6ee41268 883 }
dc0b027d 884out:
6ee41268
TM		 885 return ret;
886}
887
dc0b027d 888static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 889{
dc0b027d 890 if ((delegation->type & fmode) != fmode)
aac00a8d 891 return 0;
15c831bf 892 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 893 return 0;
b7391f44 894 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 895 return 1;
896}
897
dc0b027d 898static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 899{
dc0b027d 900 switch (fmode) {
e7616923
TM		 901 case FMODE_WRITE:
902 state->n_wronly++;
903 break;
904 case FMODE_READ:
905 state->n_rdonly++;
906 break;
907 case FMODE_READ|FMODE_WRITE:
908 state->n_rdwr++;
909 }
dc0b027d 910 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 911}
912
dc0b027d 913static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 914{
915 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
916 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
917 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 918 switch (fmode) {
003707c7
TM		 919 case FMODE_READ:
920 set_bit(NFS_O_RDONLY_STATE, &state->flags);
921 break;
922 case FMODE_WRITE:
923 set_bit(NFS_O_WRONLY_STATE, &state->flags);
924 break;
925 case FMODE_READ|FMODE_WRITE:
926 set_bit(NFS_O_RDWR_STATE, &state->flags);
927 }
e7616923
TM		 928}
929
dc0b027d 930static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 931{
8bda4e4c 932 write_seqlock(&state->seqlock);
dc0b027d 933 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 934 write_sequnlock(&state->seqlock);
003707c7
TM		 935}
936
dc0b027d 937static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 938{
8bda4e4c
TM		 939 /*
940 * Protect the call to nfs4_state_set_mode_locked and
941 * serialise the stateid update
942 */
943 write_seqlock(&state->seqlock);
003707c7
TM		 944 if (deleg_stateid != NULL) {
945 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
946 set_bit(NFS_DELEGATED_STATE, &state->flags);
947 }
948 if (open_stateid != NULL)
dc0b027d 949 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 950 write_sequnlock(&state->seqlock);
951 spin_lock(&state->owner->so_lock);
dc0b027d 952 update_open_stateflags(state, fmode);
ec073428 953 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 954}
955
dc0b027d 956static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 957{
958 struct nfs_inode *nfsi = NFS_I(state->inode);
959 struct nfs_delegation *deleg_cur;
960 int ret = 0;
961
dc0b027d 962 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 963
964 rcu_read_lock();
965 deleg_cur = rcu_dereference(nfsi->delegation);
966 if (deleg_cur == NULL)
967 goto no_delegation;
968
969 spin_lock(&deleg_cur->lock);
970 if (nfsi->delegation != deleg_cur ||
dc0b027d 971 (deleg_cur->type & fmode) != fmode)
34310430
TM		 972 goto no_delegation_unlock;
973
974 if (delegation == NULL)
975 delegation = &deleg_cur->stateid;
976 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
977 goto no_delegation_unlock;
978
b7391f44 979 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 980 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 981 ret = 1;
982no_delegation_unlock:
983 spin_unlock(&deleg_cur->lock);
984no_delegation:
985 rcu_read_unlock();
986
987 if (!ret && open_stateid != NULL) {
dc0b027d 988 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 989 ret = 1;
990 }
991
992 return ret;
993}
994
995
dc0b027d 996static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 997{
998 struct nfs_delegation *delegation;
999
1000 rcu_read_lock();
1001 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1002 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1003 rcu_read_unlock();
1004 return;
1005 }
1006 rcu_read_unlock();
1007 nfs_inode_return_delegation(inode);
1008}
1009
6ee41268 1010static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1011{
1012 struct nfs4_state *state = opendata->state;
1013 struct nfs_inode *nfsi = NFS_I(state->inode);
1014 struct nfs_delegation *delegation;
dc0b027d
TM		 1015 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1016 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1017 nfs4_stateid stateid;
1018 int ret = -EAGAIN;
1019
aac00a8d 1020 for (;;) {
dc0b027d 1021 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1022 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1023 if (can_open_cached(state, fmode, open_mode)) {
1024 update_open_stateflags(state, fmode);
6ee41268 1025 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1026 goto out_return_state;
1027 }
1028 spin_unlock(&state->owner->so_lock);
1029 }
34310430
TM		 1030 rcu_read_lock();
1031 delegation = rcu_dereference(nfsi->delegation);
1032 if (delegation == NULL ||
dc0b027d 1033 !can_open_delegated(delegation, fmode)) {
34310430 1034 rcu_read_unlock();
aac00a8d 1035 break;
34310430 1036 }
aac00a8d
TM		 1037 /* Save the delegation */
1038 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1039 rcu_read_unlock();
af22f94a 1040 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1041 if (ret != 0)
1042 goto out;
1043 ret = -EAGAIN;
34310430
TM		 1044
1045 /* Try to update the stateid using the delegation */
dc0b027d 1046 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1047 goto out_return_state;
aac00a8d 1048 }
aac00a8d
TM		 1049out:
1050 return ERR_PTR(ret);
1051out_return_state:
1052 atomic_inc(&state->count);
1053 return state;
1054}
1055
24ac23ab
TM		 1056static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1057{
1058 struct inode *inode;
1059 struct nfs4_state *state = NULL;
003707c7 1060 struct nfs_delegation *delegation;
1b370bc2 1061 int ret;
24ac23ab 1062
aac00a8d 1063 if (!data->rpc_done) {
6ee41268 1064 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1065 goto out;
1066 }
1067
1b370bc2 1068 ret = -EAGAIN;
24ac23ab 1069 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1070 goto err;
24ac23ab 1071 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1072 ret = PTR_ERR(inode);
03f28e3a 1073 if (IS_ERR(inode))
1b370bc2
TM		 1074 goto err;
1075 ret = -ENOMEM;
24ac23ab
TM		 1076 state = nfs4_get_open_state(inode, data->owner);
1077 if (state == NULL)
1b370bc2 1078 goto err_put_inode;
549d6ed5 1079 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1080 int delegation_flags = 0;
1081
003707c7
TM		 1082 rcu_read_lock();
1083 delegation = rcu_dereference(NFS_I(inode)->delegation);
1084 if (delegation)
1085 delegation_flags = delegation->flags;
1086 rcu_read_unlock();
15c831bf 1087 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1088 nfs_inode_set_delegation(state->inode,
1089 data->owner->so_cred,
1090 &data->o_res);
1091 else
1092 nfs_inode_reclaim_delegation(state->inode,
1093 data->owner->so_cred,
1094 &data->o_res);
1095 }
34310430
TM		 1096
1097 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1098 data->o_arg.fmode);
24ac23ab 1099 iput(inode);
aac00a8d 1100out:
24ac23ab 1101 return state;
1b370bc2
TM		 1102err_put_inode:
1103 iput(inode);
1104err:
1105 return ERR_PTR(ret);
24ac23ab
TM		 1106}
1107
864472e9
TM		 1108static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1109{
1110 struct nfs_inode *nfsi = NFS_I(state->inode);
1111 struct nfs_open_context *ctx;
1112
1113 spin_lock(&state->inode->i_lock);
1114 list_for_each_entry(ctx, &nfsi->open_files, list) {
1115 if (ctx->state != state)
1116 continue;
1117 get_nfs_open_context(ctx);
1118 spin_unlock(&state->inode->i_lock);
1119 return ctx;
1120 }
1121 spin_unlock(&state->inode->i_lock);
1122 return ERR_PTR(-ENOENT);
1123}
1124
6f220ed5
TM		 1125static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1126{
1127 struct nfs4_opendata *opendata;
1128
8535b2be 1129 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1130 if (opendata == NULL)
1131 return ERR_PTR(-ENOMEM);
1132 opendata->state = state;
1133 atomic_inc(&state->count);
1134 return opendata;
1135}
1136
dc0b027d 1137static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1138{
2ced46c2 1139 struct nfs4_state *newstate;
864472e9
TM		 1140 int ret;
1141
dc0b027d
TM		 1142 opendata->o_arg.open_flags = 0;
1143 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1144 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1145 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1146 nfs4_init_opendata_res(opendata);
b257957e 1147 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1148 if (ret != 0)
1149 return ret;
2ced46c2 1150 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1151 if (IS_ERR(newstate))
1152 return PTR_ERR(newstate);
dc0b027d 1153 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1154 *res = newstate;
864472e9
TM		 1155 return 0;
1156}
1157
1158static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1159{
864472e9 1160 struct nfs4_state *newstate;
864472e9
TM		 1161 int ret;
1162
1163 /* memory barrier prior to reading state->n_* */
2ced46c2 1164 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1165 smp_rmb();
1166 if (state->n_rdwr != 0) {
b0ed9dbc 1167 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1168 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1169 if (ret != 0)
1170 return ret;
2ced46c2
TM		 1171 if (newstate != state)
1172 return -ESTALE;
864472e9
TM		 1173 }
1174 if (state->n_wronly != 0) {
b0ed9dbc 1175 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1176 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1177 if (ret != 0)
1178 return ret;
2ced46c2
TM		 1179 if (newstate != state)
1180 return -ESTALE;
864472e9
TM		 1181 }
1182 if (state->n_rdonly != 0) {
b0ed9dbc 1183 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1184 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1185 if (ret != 0)
1186 return ret;
2ced46c2
TM		 1187 if (newstate != state)
1188 return -ESTALE;
864472e9 1189 }
1ac7e2fd
TM		 1190 /*
1191 * We may have performed cached opens for all three recoveries.
1192 * Check if we need to update the current stateid.
1193 */
1194 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1195 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1196 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1197 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1198 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1199 write_sequnlock(&state->seqlock);
1ac7e2fd 1200 }
864472e9
TM		 1201 return 0;
1202}
1203
1da177e4
LT		 1204/*
1205 * OPEN_RECLAIM:
1206 * reclaim state on the server after a reboot.
1da177e4 1207 */
539cd03a 1208static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1209{
1ac7e2fd 1210 struct nfs_delegation *delegation;
864472e9 1211 struct nfs4_opendata *opendata;
dc0b027d 1212 fmode_t delegation_type = 0;
1da177e4
LT		 1213 int status;
1214
6f220ed5
TM		 1215 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1216 if (IS_ERR(opendata))
1217 return PTR_ERR(opendata);
864472e9
TM		 1218 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1219 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1220 rcu_read_lock();
1221 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1222 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1223 delegation_type = delegation->type;
1ac7e2fd 1224 rcu_read_unlock();
864472e9
TM		 1225 opendata->o_arg.u.delegation_type = delegation_type;
1226 status = nfs4_open_recover(opendata, state);
c6d00e63 1227 nfs4_opendata_put(opendata);
1da177e4
LT		 1228 return status;
1229}
1230
539cd03a 1231static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1232{
1233 struct nfs_server *server = NFS_SERVER(state->inode);
1234 struct nfs4_exception exception = { };
1235 int err;
1236 do {
539cd03a 1237 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1238 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1239 break;
1240 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1241 } while (exception.retry);
1242 return err;
1243}
1244
864472e9
TM		 1245static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1246{
1247 struct nfs_open_context *ctx;
1248 int ret;
1249
1250 ctx = nfs4_state_find_open_context(state);
1251 if (IS_ERR(ctx))
1252 return PTR_ERR(ctx);
539cd03a 1253 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1254 put_nfs_open_context(ctx);
1255 return ret;
1256}
1257
13437e12 1258static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1259{
e56e0b78 1260 struct nfs4_opendata *opendata;
864472e9 1261 int ret;
1da177e4 1262
6f220ed5
TM		 1263 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1264 if (IS_ERR(opendata))
1265 return PTR_ERR(opendata);
e56e0b78 1266 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1267 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1268 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1269 ret = nfs4_open_recover(opendata, state);
c6d00e63 1270 nfs4_opendata_put(opendata);
864472e9 1271 return ret;
1da177e4
LT		 1272}
1273
13437e12 1274int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1275{
1276 struct nfs4_exception exception = { };
539cd03a 1277 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1278 int err;
1279 do {
13437e12 1280 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1281 switch (err) {
1282 case 0:
965b5d67
TM		 1283 case -ENOENT:
1284 case -ESTALE:
1285 goto out;
bcfa49f6
RL		 1286 case -NFS4ERR_BADSESSION:
1287 case -NFS4ERR_BADSLOT:
1288 case -NFS4ERR_BAD_HIGH_SLOT:
1289 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1290 case -NFS4ERR_DEADSESSION:
0400a6b0 1291 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1292 goto out;
1da177e4
LT		 1293 case -NFS4ERR_STALE_CLIENTID:
1294 case -NFS4ERR_STALE_STATEID:
1295 case -NFS4ERR_EXPIRED:
1296 /* Don't recall a delegation if it was lost */
0400a6b0 1297 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1298 goto out;
1299 case -ERESTARTSYS:
1300 /*
1301 * The show must go on: exit, but mark the
1302 * stateid as needing recovery.
1303 */
1304 case -NFS4ERR_ADMIN_REVOKED:
1305 case -NFS4ERR_BAD_STATEID:
0400a6b0 1306 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1307 case -EKEYEXPIRED:
1308 /*
1309 * User RPCSEC_GSS context has expired.
1310 * We cannot recover this stateid now, so
1311 * skip it and allow recovery thread to
1312 * proceed.
1313 */
965b5d67
TM		 1314 case -ENOMEM:
1315 err = 0;
1316 goto out;
1da177e4
LT		 1317 }
1318 err = nfs4_handle_exception(server, err, &exception);
1319 } while (exception.retry);
965b5d67 1320out:
1da177e4
LT		 1321 return err;
1322}
1323
cdd4e68b
TM		 1324static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1325{
1326 struct nfs4_opendata *data = calldata;
1327
1328 data->rpc_status = task->tk_status;
26e976a8 1329 if (data->rpc_status == 0) {
cdd4e68b
TM		 1330 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1331 sizeof(data->o_res.stateid.data));
bb22629e 1332 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1333 renew_lease(data->o_res.server, data->timestamp);
3e309914 1334 data->rpc_done = 1;
26e976a8 1335 }
cdd4e68b
TM		 1336}
1337
1338static void nfs4_open_confirm_release(void *calldata)
1339{
1340 struct nfs4_opendata *data = calldata;
1341 struct nfs4_state *state = NULL;
1342
1343 /* If this request hasn't been cancelled, do nothing */
1344 if (data->cancelled == 0)
1345 goto out_free;
1346 /* In case of error, no cleanup! */
3e309914 1347 if (!data->rpc_done)
cdd4e68b 1348 goto out_free;
cdd4e68b 1349 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1350 if (!IS_ERR(state))
dc0b027d 1351 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1352out_free:
c6d00e63 1353 nfs4_opendata_put(data);
cdd4e68b
TM		 1354}
1355
1356static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1357 .rpc_call_done = nfs4_open_confirm_done,
1358 .rpc_release = nfs4_open_confirm_release,
1359};
1360
1361/*
1362 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1363 */
1364static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1365{
1366 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1367 struct rpc_task *task;
5138fde0
TM		 1368 struct rpc_message msg = {
1369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1370 .rpc_argp = &data->c_arg,
1371 .rpc_resp = &data->c_res,
1372 .rpc_cred = data->owner->so_cred,
1373 };
c970aa85
TM		 1374 struct rpc_task_setup task_setup_data = {
1375 .rpc_client = server->client,
5138fde0 1376 .rpc_message = &msg,
c970aa85
TM		 1377 .callback_ops = &nfs4_open_confirm_ops,
1378 .callback_data = data,
101070ca 1379 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1380 .flags = RPC_TASK_ASYNC,
1381 };
1da177e4
LT		 1382 int status;
1383
c6d00e63 1384 kref_get(&data->kref);
3e309914
TM		 1385 data->rpc_done = 0;
1386 data->rpc_status = 0;
5138fde0 1387 data->timestamp = jiffies;
c970aa85 1388 task = rpc_run_task(&task_setup_data);
7a1218a2 1389 if (IS_ERR(task))
cdd4e68b 1390 return PTR_ERR(task);
cdd4e68b
TM		 1391 status = nfs4_wait_for_completion_rpc_task(task);
1392 if (status != 0) {
1393 data->cancelled = 1;
1394 smp_wmb();
1395 } else
1396 status = data->rpc_status;
e6b3c4db 1397 rpc_put_task(task);
1da177e4
LT		 1398 return status;
1399}
1400
24ac23ab 1401static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1402{
24ac23ab
TM		 1403 struct nfs4_opendata *data = calldata;
1404 struct nfs4_state_owner *sp = data->owner;
5138fde0 1405
24ac23ab
TM		 1406 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1407 return;
aac00a8d
TM		 1408 /*
1409 * Check if we still need to send an OPEN call, or if we can use
1410 * a delegation instead.
1411 */
1412 if (data->state != NULL) {
1413 struct nfs_delegation *delegation;
1414
dc0b027d 1415 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1416 goto out_no_action;
aac00a8d
TM		 1417 rcu_read_lock();
1418 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1419 if (delegation != NULL &&
15c831bf 1420 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1421 rcu_read_unlock();
6ee41268 1422 goto out_no_action;
aac00a8d
TM		 1423 }
1424 rcu_read_unlock();
1425 }
24ac23ab 1426 /* Update sequence id. */
9f958ab8 1427 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1428 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1429 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1430 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1431 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1432 }
26e976a8 1433 data->timestamp = jiffies;
035168ab 1434 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1435 &data->o_arg.seq_args,
1436 &data->o_res.seq_res, 1, task))
1437 return;
5138fde0 1438 rpc_call_start(task);
6ee41268
TM		 1439 return;
1440out_no_action:
1441 task->tk_action = NULL;
1442
24ac23ab 1443}
1da177e4 1444
b257957e
AB		 1445static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1446{
1447 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1448 nfs4_open_prepare(task, calldata);
1449}
1450
24ac23ab
TM		 1451static void nfs4_open_done(struct rpc_task *task, void *calldata)
1452{
1453 struct nfs4_opendata *data = calldata;
1da177e4 1454
24ac23ab 1455 data->rpc_status = task->tk_status;
d898528c 1456
14516c3a
TM		 1457 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1458 return;
d898528c 1459
24ac23ab
TM		 1460 if (task->tk_status == 0) {
1461 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1462 case S_IFREG:
1463 break;
1464 case S_IFLNK:
24ac23ab 1465 data->rpc_status = -ELOOP;
6f926b5b
TM		 1466 break;
1467 case S_IFDIR:
24ac23ab 1468 data->rpc_status = -EISDIR;
6f926b5b
TM		 1469 break;
1470 default:
24ac23ab 1471 data->rpc_status = -ENOTDIR;
6f926b5b 1472 }
26e976a8 1473 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1474 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1475 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1476 }
3e309914 1477 data->rpc_done = 1;
24ac23ab 1478}
6f926b5b 1479
24ac23ab
TM		 1480static void nfs4_open_release(void *calldata)
1481{
1482 struct nfs4_opendata *data = calldata;
1483 struct nfs4_state *state = NULL;
1484
1485 /* If this request hasn't been cancelled, do nothing */
1486 if (data->cancelled == 0)
1487 goto out_free;
1488 /* In case of error, no cleanup! */
3e309914 1489 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1490 goto out_free;
1491 /* In case we need an open_confirm, no cleanup! */
1492 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1493 goto out_free;
24ac23ab 1494 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1495 if (!IS_ERR(state))
dc0b027d 1496 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1497out_free:
c6d00e63 1498 nfs4_opendata_put(data);
24ac23ab
TM		 1499}
1500
1501static const struct rpc_call_ops nfs4_open_ops = {
1502 .rpc_call_prepare = nfs4_open_prepare,
1503 .rpc_call_done = nfs4_open_done,
1504 .rpc_release = nfs4_open_release,
1505};
1506
b257957e
AB		 1507static const struct rpc_call_ops nfs4_recover_open_ops = {
1508 .rpc_call_prepare = nfs4_recover_open_prepare,
1509 .rpc_call_done = nfs4_open_done,
1510 .rpc_release = nfs4_open_release,
1511};
1512
1513static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1514{
1515 struct inode *dir = data->dir->d_inode;
1516 struct nfs_server *server = NFS_SERVER(dir);
1517 struct nfs_openargs *o_arg = &data->o_arg;
1518 struct nfs_openres *o_res = &data->o_res;
1519 struct rpc_task *task;
5138fde0
TM		 1520 struct rpc_message msg = {
1521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1522 .rpc_argp = o_arg,
1523 .rpc_resp = o_res,
1524 .rpc_cred = data->owner->so_cred,
1525 };
c970aa85
TM		 1526 struct rpc_task_setup task_setup_data = {
1527 .rpc_client = server->client,
5138fde0 1528 .rpc_message = &msg,
c970aa85
TM		 1529 .callback_ops = &nfs4_open_ops,
1530 .callback_data = data,
101070ca 1531 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1532 .flags = RPC_TASK_ASYNC,
1533 };
24ac23ab
TM		 1534 int status;
1535
c6d00e63 1536 kref_get(&data->kref);
3e309914
TM		 1537 data->rpc_done = 0;
1538 data->rpc_status = 0;
2ced46c2 1539 data->cancelled = 0;
b257957e
AB		 1540 if (isrecover)
1541 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1542 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1543 if (IS_ERR(task))
1544 return PTR_ERR(task);
1545 status = nfs4_wait_for_completion_rpc_task(task);
1546 if (status != 0) {
1547 data->cancelled = 1;
1548 smp_wmb();
1549 } else
1550 status = data->rpc_status;
1551 rpc_put_task(task);
1552
1553 return status;
1554}
1555
1556static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1557{
1558 struct inode *dir = data->dir->d_inode;
1559 struct nfs_openres *o_res = &data->o_res;
1560 int status;
1561
1562 status = nfs4_run_open_task(data, 1);
1563 if (status != 0 || !data->rpc_done)
1564 return status;
1565
1566 nfs_refresh_inode(dir, o_res->dir_attr);
1567
1568 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1569 status = _nfs4_proc_open_confirm(data);
1570 if (status != 0)
1571 return status;
1572 }
1573
1574 return status;
1575}
1576
1577/*
1578 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1579 */
1580static int _nfs4_proc_open(struct nfs4_opendata *data)
1581{
1582 struct inode *dir = data->dir->d_inode;
1583 struct nfs_server *server = NFS_SERVER(dir);
1584 struct nfs_openargs *o_arg = &data->o_arg;
1585 struct nfs_openres *o_res = &data->o_res;
1586 int status;
1587
1588 status = nfs4_run_open_task(data, 0);
3e309914 1589 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1590 return status;
1591
56ae19f3
TM		 1592 if (o_arg->open_flags & O_CREAT) {
1593 update_changeattr(dir, &o_res->cinfo);
1594 nfs_post_op_update_inode(dir, o_res->dir_attr);
1595 } else
1596 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1597 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1598 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1599 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1600 status = _nfs4_proc_open_confirm(data);
1da177e4 1601 if (status != 0)
24ac23ab 1602 return status;
1da177e4
LT		 1603 }
1604 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1605 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1606 return 0;
1da177e4
LT		 1607}
1608
d83217c1 1609static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1610{
a78cb57a 1611 unsigned int loop;
6b30954e 1612 int ret;
58d9714a 1613
a78cb57a 1614 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1615 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1616 if (ret != 0)
a78cb57a 1617 break;
e598d843
TM		 1618 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1619 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1620 break;
0400a6b0 1621 nfs4_schedule_state_manager(clp);
a78cb57a 1622 ret = -EIO;
6b30954e 1623 }
a78cb57a 1624 return ret;
58d9714a
TM		 1625}
1626
d83217c1
AA		 1627static int nfs4_recover_expired_lease(struct nfs_server *server)
1628{
1629 return nfs4_client_recover_expired_lease(server->nfs_client);
1630}
1631
1da177e4
LT		 1632/*
1633 * OPEN_EXPIRED:
1634 * reclaim state on the server after a network partition.
1635 * Assumes caller holds the appropriate lock
1636 */
539cd03a 1637static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1638{
e56e0b78 1639 struct nfs4_opendata *opendata;
864472e9 1640 int ret;
1da177e4 1641
6f220ed5
TM		 1642 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1643 if (IS_ERR(opendata))
1644 return PTR_ERR(opendata);
864472e9 1645 ret = nfs4_open_recover(opendata, state);
35d05778 1646 if (ret == -ESTALE)
539cd03a 1647 d_drop(ctx->path.dentry);
c6d00e63 1648 nfs4_opendata_put(opendata);
864472e9 1649 return ret;
1da177e4
LT		 1650}
1651
a9ed2e25 1652static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1653{
539cd03a 1654 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1655 struct nfs4_exception exception = { };
1656 int err;
1657
1658 do {
539cd03a 1659 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1660 switch (err) {
1661 default:
1662 goto out;
1663 case -NFS4ERR_GRACE:
1664 case -NFS4ERR_DELAY:
1665 nfs4_handle_exception(server, err, &exception);
1666 err = 0;
1667 }
202b50dc 1668 } while (exception.retry);
a9ed2e25 1669out:
202b50dc
TM		 1670 return err;
1671}
1672
1da177e4
LT		 1673static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1674{
1da177e4 1675 struct nfs_open_context *ctx;
864472e9 1676 int ret;
1da177e4 1677
864472e9
TM		 1678 ctx = nfs4_state_find_open_context(state);
1679 if (IS_ERR(ctx))
1680 return PTR_ERR(ctx);
539cd03a 1681 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1682 put_nfs_open_context(ctx);
1683 return ret;
1da177e4
LT		 1684}
1685
aa53ed54
JL		 1686/*
1687 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1688 * fields corresponding to attributes that were used to store the verifier.
1689 * Make sure we clobber those fields in the later setattr call
1690 */
1691static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1692{
1693 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1694 !(sattr->ia_valid & ATTR_ATIME_SET))
1695 sattr->ia_valid |= ATTR_ATIME;
1696
1697 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1698 !(sattr->ia_valid & ATTR_MTIME_SET))
1699 sattr->ia_valid |= ATTR_MTIME;
1700}
1701
1da177e4 1702/*
24ac23ab 1703 * Returns a referenced nfs4_state
1da177e4 1704 */
dc0b027d 1705static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1706{
1707 struct nfs4_state_owner *sp;
1708 struct nfs4_state *state = NULL;
1709 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1710 struct nfs4_opendata *opendata;
aac00a8d 1711 int status;
1da177e4
LT		 1712
1713 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1714 status = -ENOMEM;
1715 if (!(sp = nfs4_get_state_owner(server, cred))) {
1716 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1717 goto out_err;
1718 }
58d9714a
TM		 1719 status = nfs4_recover_expired_lease(server);
1720 if (status != 0)
b4454fe1 1721 goto err_put_state_owner;
aac00a8d 1722 if (path->dentry->d_inode != NULL)
dc0b027d 1723 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1724 status = -ENOMEM;
8535b2be 1725 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1726 if (opendata == NULL)
95d35cb4 1727 goto err_put_state_owner;
1da177e4 1728
aac00a8d
TM		 1729 if (path->dentry->d_inode != NULL)
1730 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1731
24ac23ab 1732 status = _nfs4_proc_open(opendata);
1da177e4 1733 if (status != 0)
c6d00e63 1734 goto err_opendata_put;
1da177e4 1735
24ac23ab 1736 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1737 status = PTR_ERR(state);
1738 if (IS_ERR(state))
c6d00e63 1739 goto err_opendata_put;
0df5dd4a 1740 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1741 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1742
1743 if (opendata->o_arg.open_flags & O_EXCL) {
1744 nfs4_exclusive_attrset(opendata, sattr);
1745
1746 nfs_fattr_init(opendata->o_res.f_attr);
1747 status = nfs4_do_setattr(state->inode, cred,
1748 opendata->o_res.f_attr, sattr,
1749 state);
1750 if (status == 0)
1751 nfs_setattr_update_inode(state->inode, sattr);
1752 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1753 }
c6d00e63 1754 nfs4_opendata_put(opendata);
1da177e4 1755 nfs4_put_state_owner(sp);
1da177e4
LT		 1756 *res = state;
1757 return 0;
c6d00e63
TM		 1758err_opendata_put:
1759 nfs4_opendata_put(opendata);
e56e0b78
TM		 1760err_put_state_owner:
1761 nfs4_put_state_owner(sp);
1da177e4 1762out_err:
1da177e4
LT		 1763 *res = NULL;
1764 return status;
1765}
1766
1767
dc0b027d 1768static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1769{
1770 struct nfs4_exception exception = { };
1771 struct nfs4_state *res;
1772 int status;
1773
1774 do {
dc0b027d 1775 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1776 if (status == 0)
1777 break;
1778 /* NOTE: BAD_SEQID means the server and client disagree about the
1779 * book-keeping w.r.t. state-changing operations
1780 * (OPEN/CLOSE/LOCK/LOCKU...)
1781 * It is actually a sign of a bug on the client or on the server.
1782 *
1783 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1784 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1785 * have unhashed the old state_owner for us, and that we can
1786 * therefore safely retry using a new one. We should still warn
1787 * the user though...
1788 */
1789 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1790 printk(KERN_WARNING "NFS: v4 server %s "
1791 " returned a bad sequence-id error!\n",
1792 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1793 exception.retry = 1;
1794 continue;
1795 }
550f5747
TM		 1796 /*
1797 * BAD_STATEID on OPEN means that the server cancelled our
1798 * state before it received the OPEN_CONFIRM.
1799 * Recover by retrying the request as per the discussion
1800 * on Page 181 of RFC3530.
1801 */
1802 if (status == -NFS4ERR_BAD_STATEID) {
1803 exception.retry = 1;
1804 continue;
1805 }
aac00a8d
TM		 1806 if (status == -EAGAIN) {
1807 /* We must have found a delegation */
1808 exception.retry = 1;
1809 continue;
1810 }
1da177e4
LT		 1811 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1812 status, &exception));
1813 } while (exception.retry);
1814 return res;
1815}
1816
659bfcd6
TM		 1817static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1818 struct nfs_fattr *fattr, struct iattr *sattr,
1819 struct nfs4_state *state)
1da177e4 1820{
3e4f6290 1821 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1822 struct nfs_setattrargs arg = {
3e4f6290 1823 .fh = NFS_FH(inode),
1da177e4
LT		 1824 .iap = sattr,
1825 .server = server,
1826 .bitmask = server->attr_bitmask,
1827 };
1828 struct nfs_setattrres res = {
1829 .fattr = fattr,
1830 .server = server,
1831 };
1832 struct rpc_message msg = {
659bfcd6
TM		 1833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1834 .rpc_argp = &arg,
1835 .rpc_resp = &res,
1836 .rpc_cred = cred,
1da177e4 1837 };
26e976a8 1838 unsigned long timestamp = jiffies;
65e4308d 1839 int status;
1da177e4 1840
0e574af1 1841 nfs_fattr_init(fattr);
1da177e4 1842
3e4f6290
TM		 1843 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1844 /* Use that stateid */
1845 } else if (state != NULL) {
77041ed9 1846 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1847 } else
1da177e4
LT		 1848 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1849
7c513058 1850 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1851 if (status == 0 && state != NULL)
1852 renew_lease(server, timestamp);
65e4308d 1853 return status;
1da177e4
LT		 1854}
1855
659bfcd6
TM		 1856static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1857 struct nfs_fattr *fattr, struct iattr *sattr,
1858 struct nfs4_state *state)
1da177e4 1859{
3e4f6290 1860 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1861 struct nfs4_exception exception = { };
1862 int err;
1863 do {
1864 err = nfs4_handle_exception(server,
659bfcd6 1865 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1866 &exception);
1867 } while (exception.retry);
1868 return err;
1869}
1870
1871struct nfs4_closedata {
4a35bd41 1872 struct path path;
1da177e4
LT		 1873 struct inode *inode;
1874 struct nfs4_state *state;
1875 struct nfs_closeargs arg;
1876 struct nfs_closeres res;
516a6af6 1877 struct nfs_fattr fattr;
26e976a8 1878 unsigned long timestamp;
f7e8917a
FI		 1879 bool roc;
1880 u32 roc_barrier;
1da177e4
LT		 1881};
1882
963d8fe5 1883static void nfs4_free_closedata(void *data)
9512135d 1884{
963d8fe5
TM		 1885 struct nfs4_closedata *calldata = data;
1886 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1887
f7e8917a
FI		 1888 if (calldata->roc)
1889 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1890 nfs4_put_open_state(calldata->state);
1891 nfs_free_seqid(calldata->arg.seqid);
9512135d 1892 nfs4_put_state_owner(sp);
31f31db1 1893 path_put(&calldata->path);
9512135d
TM		 1894 kfree(calldata);
1895}
1896
88069f77
TM		 1897static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1898 fmode_t fmode)
1899{
1900 spin_lock(&state->owner->so_lock);
1901 if (!(fmode & FMODE_READ))
1902 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1903 if (!(fmode & FMODE_WRITE))
1904 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1905 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1906 spin_unlock(&state->owner->so_lock);
1907}
1908
963d8fe5 1909static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1910{
963d8fe5 1911 struct nfs4_closedata *calldata = data;
1da177e4 1912 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1913 struct nfs_server *server = NFS_SERVER(calldata->inode);
1914
14516c3a
TM		 1915 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1916 return;
1da177e4
LT		 1917 /* hmm. we are done with the inode, and in the process of freeing
1918 * the state_owner. we keep this around to process errors
1919 */
1da177e4
LT		 1920 switch (task->tk_status) {
1921 case 0:
f7e8917a
FI		 1922 if (calldata->roc)
1923 pnfs_roc_set_barrier(state->inode,
1924 calldata->roc_barrier);
45328c35 1925 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1926 renew_lease(server, calldata->timestamp);
88069f77
TM		 1927 nfs4_close_clear_stateid_flags(state,
1928 calldata->arg.fmode);
1da177e4
LT		 1929 break;
1930 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1931 case -NFS4ERR_OLD_STATEID:
1932 case -NFS4ERR_BAD_STATEID:
1da177e4 1933 case -NFS4ERR_EXPIRED:
dc0b027d 1934 if (calldata->arg.fmode == 0)
9e33bed5 1935 break;
1da177e4 1936 default:
72211dbe
TM		 1937 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1938 rpc_restart_call_prepare(task);
1da177e4 1939 }
72211dbe 1940 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1941 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1942}
1943
4ce70ada 1944static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1945{
4ce70ada 1946 struct nfs4_closedata *calldata = data;
9512135d 1947 struct nfs4_state *state = calldata->state;
88069f77 1948 int call_close = 0;
9512135d 1949
963d8fe5 1950 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1951 return;
003707c7 1952
88069f77
TM		 1953 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1954 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1955 spin_lock(&state->owner->so_lock);
003707c7 1956 /* Calculate the change in open mode */
e7616923 1957 if (state->n_rdwr == 0) {
003707c7 1958 if (state->n_rdonly == 0) {
88069f77
TM		 1959 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1960 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1961 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1962 }
1963 if (state->n_wronly == 0) {
88069f77
TM		 1964 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1965 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1966 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1967 }
e7616923 1968 }
4cecb76f 1969 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1970
1971 if (!call_close) {
963d8fe5
TM		 1972 /* Note: exit _without_ calling nfs4_close_done */
1973 task->tk_action = NULL;
9512135d
TM		 1974 return;
1975 }
88069f77 1976
f7e8917a 1977 if (calldata->arg.fmode == 0) {
88069f77 1978 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1979 if (calldata->roc &&
1980 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1981 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1982 task, NULL);
1983 return;
1984 }
1985 }
88069f77 1986
516a6af6 1987 nfs_fattr_init(calldata->res.fattr);
26e976a8 1988 calldata->timestamp = jiffies;
035168ab 1989 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1990 &calldata->arg.seq_args, &calldata->res.seq_res,
1991 1, task))
1992 return;
5138fde0 1993 rpc_call_start(task);
1da177e4
LT		 1994}
1995
963d8fe5 1996static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1997 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1998 .rpc_call_done = nfs4_close_done,
1999 .rpc_release = nfs4_free_closedata,
2000};
2001
1da177e4
LT		 2002/*
2003 * It is possible for data to be read/written from a mem-mapped file
2004 * after the sys_close call (which hits the vfs layer as a flush).
2005 * This means that we can't safely call nfsv4 close on a file until
2006 * the inode is cleared. This in turn means that we are not good
2007 * NFSv4 citizens - we do not indicate to the server to update the file's
2008 * share state even when we are done with one of the three share
2009 * stateid's in the inode.
2010 *
2011 * NOTE: Caller must be holding the sp->so_owner semaphore!
2012 */
f7e8917a 2013int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2014{
4a35bd41 2015 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2016 struct nfs4_closedata *calldata;
b39e625b
TM		 2017 struct nfs4_state_owner *sp = state->owner;
2018 struct rpc_task *task;
5138fde0
TM		 2019 struct rpc_message msg = {
2020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2021 .rpc_cred = state->owner->so_cred,
2022 };
c970aa85
TM		 2023 struct rpc_task_setup task_setup_data = {
2024 .rpc_client = server->client,
5138fde0 2025 .rpc_message = &msg,
c970aa85 2026 .callback_ops = &nfs4_close_ops,
101070ca 2027 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2028 .flags = RPC_TASK_ASYNC,
2029 };
9512135d 2030 int status = -ENOMEM;
1da177e4 2031
8535b2be 2032 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2033 if (calldata == NULL)
9512135d 2034 goto out;
4a35bd41 2035 calldata->inode = state->inode;
1da177e4 2036 calldata->state = state;
4a35bd41 2037 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2038 calldata->arg.stateid = &state->open_stateid;
1da177e4 2039 /* Serialization for the sequence id */
8535b2be 2040 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2041 if (calldata->arg.seqid == NULL)
2042 goto out_free_calldata;
dc0b027d 2043 calldata->arg.fmode = 0;
a65318bf 2044 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2045 calldata->res.fattr = &calldata->fattr;
c1d51931 2046 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2047 calldata->res.server = server;
f7e8917a 2048 calldata->roc = roc;
f6948697
AV		 2049 path_get(path);
2050 calldata->path = *path;
9512135d 2051
1174dd1f
TM		 2052 msg.rpc_argp = &calldata->arg;
2053 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2054 task_setup_data.callback_data = calldata;
2055 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2056 if (IS_ERR(task))
2057 return PTR_ERR(task);
a49c3c77
TM		 2058 status = 0;
2059 if (wait)
2060 status = rpc_wait_for_completion_task(task);
b39e625b 2061 rpc_put_task(task);
a49c3c77 2062 return status;
9512135d
TM		 2063out_free_calldata:
2064 kfree(calldata);
2065out:
f7e8917a
FI		 2066 if (roc)
2067 pnfs_roc_release(state->inode);
b39e625b
TM		 2068 nfs4_put_open_state(state);
2069 nfs4_put_state_owner(sp);
9512135d 2070 return status;
1da177e4
LT		 2071}
2072
2b484297 2073static struct inode *
cd9a1c0e 2074nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2075{
1da177e4 2076 struct nfs4_state *state;
1da177e4 2077
565277f6 2078 /* Protect against concurrent sillydeletes */
cd9a1c0e 2079 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2080 if (IS_ERR(state))
2081 return ERR_CAST(state);
cd9a1c0e 2082 ctx->state = state;
f46e0bd3 2083 return igrab(state->inode);
1da177e4
LT		 2084}
2085
1185a552 2086static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2087{
2088 if (ctx->state == NULL)
2089 return;
2090 if (is_sync)
2091 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2092 else
2093 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2094}
1da177e4
LT		 2095
2096static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2097{
43652ad5
BH		 2098 struct nfs4_server_caps_arg args = {
2099 .fhandle = fhandle,
2100 };
1da177e4
LT		 2101 struct nfs4_server_caps_res res = {};
2102 struct rpc_message msg = {
2103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2104 .rpc_argp = &args,
1da177e4
LT		 2105 .rpc_resp = &res,
2106 };
2107 int status;
2108
7c513058 2109 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2110 if (status == 0) {
2111 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2112 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2113 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2114 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2115 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2116 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2117 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2118 server->caps |= NFS_CAP_ACLS;
2119 if (res.has_links != 0)
2120 server->caps |= NFS_CAP_HARDLINKS;
2121 if (res.has_symlinks != 0)
2122 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2123 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2124 server->caps |= NFS_CAP_FILEID;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2126 server->caps |= NFS_CAP_MODE;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2128 server->caps |= NFS_CAP_NLINK;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2130 server->caps |= NFS_CAP_OWNER;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2132 server->caps |= NFS_CAP_OWNER_GROUP;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2134 server->caps |= NFS_CAP_ATIME;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2136 server->caps |= NFS_CAP_CTIME;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2138 server->caps |= NFS_CAP_MTIME;
2139
a65318bf
TM		 2140 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2141 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2142 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2143 server->acl_bitmask = res.acl_bitmask;
2144 }
cccef3b9 2145
1da177e4
LT		 2146 return status;
2147}
2148
55a97593 2149int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2150{
2151 struct nfs4_exception exception = { };
2152 int err;
2153 do {
2154 err = nfs4_handle_exception(server,
2155 _nfs4_server_capabilities(server, fhandle),
2156 &exception);
2157 } while (exception.retry);
2158 return err;
2159}
2160
2161static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2162 struct nfs_fsinfo *info)
2163{
1da177e4
LT		 2164 struct nfs4_lookup_root_arg args = {
2165 .bitmask = nfs4_fattr_bitmap,
2166 };
2167 struct nfs4_lookup_res res = {
2168 .server = server,
0e574af1 2169 .fattr = info->fattr,
1da177e4
LT		 2170 .fh = fhandle,
2171 };
2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2174 .rpc_argp = &args,
2175 .rpc_resp = &res,
2176 };
008f55d0 2177
0e574af1 2178 nfs_fattr_init(info->fattr);
7c513058 2179 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2180}
2181
2182static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2183 struct nfs_fsinfo *info)
2184{
2185 struct nfs4_exception exception = { };
2186 int err;
2187 do {
2188 err = nfs4_handle_exception(server,
2189 _nfs4_lookup_root(server, fhandle, info),
2190 &exception);
2191 } while (exception.retry);
2192 return err;
2193}
2194
8f70e95f
BS		 2195static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2196 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2197{
2198 struct rpc_auth *auth;
2199 int ret;
2200
2201 auth = rpcauth_create(flavor, server->client);
2202 if (!auth) {
2203 ret = -EIO;
2204 goto out;
2205 }
2206 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2207out:
2208 return ret;
2209}
2210
54ceac45
DH		 2211/*
2212 * get the file handle for the "/" directory on the server
2213 */
1da177e4 2214static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2215 struct nfs_fsinfo *info)
1da177e4 2216{
8f70e95f
BS		 2217 int i, len, status = 0;
2218 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS + 2];
1da177e4 2219
8f70e95f
BS		 2220 flav_array[0] = RPC_AUTH_UNIX;
2221 len = gss_mech_list_pseudoflavors(&flav_array[1]);
2222 flav_array[1+len] = RPC_AUTH_NULL;
2223 len += 2;
2224
2225 for (i = 0; i < len; i++) {
2226 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
d1a8016a
BS		 2227 if (status == -EPERM || status == -EACCES)
2228 continue;
2229 break;
8f70e95f 2230 }
1da177e4
LT		 2231 if (status == 0)
2232 status = nfs4_server_capabilities(server, fhandle);
2233 if (status == 0)
2234 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2235 return nfs4_map_errors(status);
1da177e4
LT		 2236}
2237
6b97fd3d
MN		 2238/*
2239 * Get locations and (maybe) other attributes of a referral.
2240 * Note that we'll actually follow the referral later when
2241 * we detect fsid mismatch in inode revalidation
2242 */
56659e99 2243static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2244{
2245 int status = -ENOMEM;
2246 struct page *page = NULL;
2247 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2248
2249 page = alloc_page(GFP_KERNEL);
2250 if (page == NULL)
2251 goto out;
2252 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2253 if (locations == NULL)
2254 goto out;
2255
c228fd3a 2256 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2257 if (status != 0)
2258 goto out;
2259 /* Make sure server returned a different fsid for the referral */
2260 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2261 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2262 status = -EIO;
2263 goto out;
2264 }
2265
2266 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2267 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2268 if (!fattr->mode)
2269 fattr->mode = S_IFDIR;
2270 memset(fhandle, 0, sizeof(struct nfs_fh));
2271out:
2272 if (page)
2273 __free_page(page);
5d7ca35a 2274 kfree(locations);
6b97fd3d
MN		 2275 return status;
2276}
2277
1da177e4
LT		 2278static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2279{
2280 struct nfs4_getattr_arg args = {
2281 .fh = fhandle,
2282 .bitmask = server->attr_bitmask,
2283 };
2284 struct nfs4_getattr_res res = {
2285 .fattr = fattr,
2286 .server = server,
2287 };
2288 struct rpc_message msg = {
2289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2290 .rpc_argp = &args,
2291 .rpc_resp = &res,
2292 };
2293
0e574af1 2294 nfs_fattr_init(fattr);
7c513058 2295 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2296}
2297
2298static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2299{
2300 struct nfs4_exception exception = { };
2301 int err;
2302 do {
2303 err = nfs4_handle_exception(server,
2304 _nfs4_proc_getattr(server, fhandle, fattr),
2305 &exception);
2306 } while (exception.retry);
2307 return err;
2308}
2309
2310/*
2311 * The file is not closed if it is opened due to the a request to change
2312 * the size of the file. The open call will not be needed once the
2313 * VFS layer lookup-intents are implemented.
2314 *
2315 * Close is called when the inode is destroyed.
2316 * If we haven't opened the file for O_WRONLY, we
2317 * need to in the size_change case to obtain a stateid.
2318 *
2319 * Got race?
2320 * Because OPEN is always done by name in nfsv4, it is
2321 * possible that we opened a different file by the same
2322 * name. We can recognize this race condition, but we
2323 * can't do anything about it besides returning an error.
2324 *
2325 * This will be fixed with VFS changes (lookup-intent).
2326 */
2327static int
2328nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2329 struct iattr *sattr)
2330{
08e9eac4 2331 struct inode *inode = dentry->d_inode;
659bfcd6 2332 struct rpc_cred *cred = NULL;
d530838b 2333 struct nfs4_state *state = NULL;
1da177e4
LT		 2334 int status;
2335
0e574af1 2336 nfs_fattr_init(fattr);
1da177e4 2337
d530838b 2338 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2339 if (sattr->ia_valid & ATTR_FILE) {
2340 struct nfs_open_context *ctx;
2341
2342 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2343 if (ctx) {
2344 cred = ctx->cred;
2345 state = ctx->state;
2346 }
659bfcd6 2347 }
08e9eac4 2348
659bfcd6 2349 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2350 if (status == 0)
2351 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2352 return status;
2353}
2354
7c513058
BS		 2355static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2356 const struct nfs_fh *dirfh, const struct qstr *name,
2357 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2358{
2359 int status;
2360 struct nfs4_lookup_arg args = {
2361 .bitmask = server->attr_bitmask,
2362 .dir_fh = dirfh,
2363 .name = name,
2364 };
2365 struct nfs4_lookup_res res = {
2366 .server = server,
2367 .fattr = fattr,
2368 .fh = fhandle,
2369 };
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
2374 };
2375
2376 nfs_fattr_init(fattr);
2377
2378 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2379 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2380 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2381 return status;
2382}
2383
2384static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2385 struct qstr *name, struct nfs_fh *fhandle,
2386 struct nfs_fattr *fattr)
2387{
2388 struct nfs4_exception exception = { };
2389 int err;
2390 do {
7c513058 2391 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2392 /* FIXME: !!!! */
2393 if (err == -NFS4ERR_MOVED) {
2394 err = -EREMOTE;
2395 break;
2396 }
2397 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2398 } while (exception.retry);
2399 return err;
2400}
2401
7c513058
BS		 2402static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2403 const struct qstr *name, struct nfs_fh *fhandle,
2404 struct nfs_fattr *fattr)
1da177e4 2405{
4e56e082 2406 int status;
1da177e4
LT		 2407
2408 dprintk("NFS call lookup %s\n", name->name);
7c513058 2409 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2410 if (status == -NFS4ERR_MOVED)
2411 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2412 dprintk("NFS reply lookup: %d\n", status);
2413 return status;
2414}
2415
7ebb9315
BS		 2416void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2417{
2418 memset(fh, 0, sizeof(struct nfs_fh));
2419 fattr->fsid.major = 1;
2420 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2421 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2422 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2423 fattr->nlink = 2;
2424}
2425
7c513058
BS		 2426static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2427 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2428{
2429 struct nfs4_exception exception = { };
2430 int err;
2431 do {
2432 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2433 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4 2434 &exception);
7ebb9315
BS		 2435 if (err == -EPERM)
2436 nfs_fixup_secinfo_attributes(fattr, fhandle);
1da177e4
LT		 2437 } while (exception.retry);
2438 return err;
2439}
2440
2441static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2442{
76b32999 2443 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2444 struct nfs4_accessargs args = {
2445 .fh = NFS_FH(inode),
76b32999
TM		 2446 .bitmask = server->attr_bitmask,
2447 };
2448 struct nfs4_accessres res = {
2449 .server = server,
1da177e4 2450 };
1da177e4
LT		 2451 struct rpc_message msg = {
2452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2453 .rpc_argp = &args,
2454 .rpc_resp = &res,
2455 .rpc_cred = entry->cred,
2456 };
2457 int mode = entry->mask;
2458 int status;
2459
2460 /*
2461 * Determine which access bits we want to ask for...
2462 */
2463 if (mode & MAY_READ)
2464 args.access |= NFS4_ACCESS_READ;
2465 if (S_ISDIR(inode->i_mode)) {
2466 if (mode & MAY_WRITE)
2467 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2468 if (mode & MAY_EXEC)
2469 args.access |= NFS4_ACCESS_LOOKUP;
2470 } else {
2471 if (mode & MAY_WRITE)
2472 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2473 if (mode & MAY_EXEC)
2474 args.access |= NFS4_ACCESS_EXECUTE;
2475 }
c407d41a
TM		 2476
2477 res.fattr = nfs_alloc_fattr();
2478 if (res.fattr == NULL)
2479 return -ENOMEM;
2480
7c513058 2481 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2482 if (!status) {
2483 entry->mask = 0;
2484 if (res.access & NFS4_ACCESS_READ)
2485 entry->mask |= MAY_READ;
2486 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2487 entry->mask |= MAY_WRITE;
2488 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2489 entry->mask |= MAY_EXEC;
c407d41a 2490 nfs_refresh_inode(inode, res.fattr);
1da177e4 2491 }
c407d41a 2492 nfs_free_fattr(res.fattr);
1da177e4
LT		 2493 return status;
2494}
2495
2496static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2497{
2498 struct nfs4_exception exception = { };
2499 int err;
2500 do {
2501 err = nfs4_handle_exception(NFS_SERVER(inode),
2502 _nfs4_proc_access(inode, entry),
2503 &exception);
2504 } while (exception.retry);
2505 return err;
2506}
2507
2508/*
2509 * TODO: For the time being, we don't try to get any attributes
2510 * along with any of the zero-copy operations READ, READDIR,
2511 * READLINK, WRITE.
2512 *
2513 * In the case of the first three, we want to put the GETATTR
2514 * after the read-type operation -- this is because it is hard
2515 * to predict the length of a GETATTR response in v4, and thus
2516 * align the READ data correctly. This means that the GETATTR
2517 * may end up partially falling into the page cache, and we should
2518 * shift it into the 'tail' of the xdr_buf before processing.
2519 * To do this efficiently, we need to know the total length
2520 * of data received, which doesn't seem to be available outside
2521 * of the RPC layer.
2522 *
2523 * In the case of WRITE, we also want to put the GETATTR after
2524 * the operation -- in this case because we want to make sure
2525 * we get the post-operation mtime and size. This means that
2526 * we can't use xdr_encode_pages() as written: we need a variant
2527 * of it which would leave room in the 'tail' iovec.
2528 *
2529 * Both of these changes to the XDR layer would in fact be quite
2530 * minor, but I decided to leave them for a subsequent patch.
2531 */
2532static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2533 unsigned int pgbase, unsigned int pglen)
2534{
2535 struct nfs4_readlink args = {
2536 .fh = NFS_FH(inode),
2537 .pgbase = pgbase,
2538 .pglen = pglen,
2539 .pages = &page,
2540 };
f50c7000 2541 struct nfs4_readlink_res res;
1da177e4
LT		 2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2544 .rpc_argp = &args,
f50c7000 2545 .rpc_resp = &res,
1da177e4
LT		 2546 };
2547
7c513058 2548 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2549}
2550
2551static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2552 unsigned int pgbase, unsigned int pglen)
2553{
2554 struct nfs4_exception exception = { };
2555 int err;
2556 do {
2557 err = nfs4_handle_exception(NFS_SERVER(inode),
2558 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2559 &exception);
2560 } while (exception.retry);
2561 return err;
2562}
2563
1da177e4
LT		 2564/*
2565 * Got race?
2566 * We will need to arrange for the VFS layer to provide an atomic open.
2567 * Until then, this create/open method is prone to inefficiency and race
2568 * conditions due to the lookup, create, and open VFS calls from sys_open()
2569 * placed on the wire.
2570 *
2571 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2572 * The file will be opened again in the subsequent VFS open call
2573 * (nfs4_proc_file_open).
2574 *
2575 * The open for read will just hang around to be used by any process that
2576 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2577 */
2578
2579static int
2580nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2581 int flags, struct nfs_open_context *ctx)
1da177e4 2582{
c0204fd2 2583 struct path my_path = {
ad389da7
TM		 2584 .dentry = dentry,
2585 };
c0204fd2 2586 struct path *path = &my_path;
1da177e4 2587 struct nfs4_state *state;
c0204fd2
TM		 2588 struct rpc_cred *cred = NULL;
2589 fmode_t fmode = 0;
1da177e4
LT		 2590 int status = 0;
2591
c0204fd2
TM		 2592 if (ctx != NULL) {
2593 cred = ctx->cred;
2594 path = &ctx->path;
2595 fmode = ctx->mode;
1da177e4 2596 }
a8a5da99 2597 sattr->ia_mode &= ~current_umask();
c0204fd2 2598 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2599 d_drop(dentry);
1da177e4
LT		 2600 if (IS_ERR(state)) {
2601 status = PTR_ERR(state);
c0204fd2 2602 goto out;
1da177e4 2603 }
d4d9cdcb 2604 d_add(dentry, igrab(state->inode));
d75340cc 2605 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2606 if (ctx != NULL)
2607 ctx->state = state;
02a913a7 2608 else
c0204fd2 2609 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2610out:
2611 return status;
2612}
2613
2614static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2615{
16e42959 2616 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2617 struct nfs_removeargs args = {
1da177e4 2618 .fh = NFS_FH(dir),
4fdc17b2
TM		 2619 .name.len = name->len,
2620 .name.name = name->name,
16e42959
TM		 2621 .bitmask = server->attr_bitmask,
2622 };
4fdc17b2 2623 struct nfs_removeres res = {
16e42959 2624 .server = server,
1da177e4 2625 };
1da177e4 2626 struct rpc_message msg = {
4fdc17b2
TM		 2627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2628 .rpc_argp = &args,
2629 .rpc_resp = &res,
1da177e4 2630 };
d346890b
TM		 2631 int status = -ENOMEM;
2632
2633 res.dir_attr = nfs_alloc_fattr();
2634 if (res.dir_attr == NULL)
2635 goto out;
1da177e4 2636
7c513058 2637 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2638 if (status == 0) {
2639 update_changeattr(dir, &res.cinfo);
d346890b 2640 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2641 }
d346890b
TM		 2642 nfs_free_fattr(res.dir_attr);
2643out:
1da177e4
LT		 2644 return status;
2645}
2646
2647static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2648{
2649 struct nfs4_exception exception = { };
2650 int err;
2651 do {
2652 err = nfs4_handle_exception(NFS_SERVER(dir),
2653 _nfs4_proc_remove(dir, name),
2654 &exception);
2655 } while (exception.retry);
2656 return err;
2657}
2658
e4eff1a6 2659static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2660{
e4eff1a6
TM		 2661 struct nfs_server *server = NFS_SERVER(dir);
2662 struct nfs_removeargs *args = msg->rpc_argp;
2663 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2664
a65318bf 2665 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2666 res->server = server;
dfb4f309 2667 res->seq_res.sr_slot = NULL;
1da177e4 2668 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2669}
2670
e4eff1a6 2671static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2672{
e4eff1a6
TM		 2673 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2674
14516c3a
TM		 2675 if (!nfs4_sequence_done(task, &res->seq_res))
2676 return 0;
9e33bed5 2677 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2678 return 0;
2679 update_changeattr(dir, &res->cinfo);
d346890b 2680 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2681 return 1;
1da177e4
LT		 2682}
2683
d3d4152a
JL		 2684static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2685{
2686 struct nfs_server *server = NFS_SERVER(dir);
2687 struct nfs_renameargs *arg = msg->rpc_argp;
2688 struct nfs_renameres *res = msg->rpc_resp;
2689
2690 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2691 arg->bitmask = server->attr_bitmask;
2692 res->server = server;
2693}
2694
2695static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2696 struct inode *new_dir)
2697{
2698 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2699
2700 if (!nfs4_sequence_done(task, &res->seq_res))
2701 return 0;
2702 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2703 return 0;
2704
2705 update_changeattr(old_dir, &res->old_cinfo);
2706 nfs_post_op_update_inode(old_dir, res->old_fattr);
2707 update_changeattr(new_dir, &res->new_cinfo);
2708 nfs_post_op_update_inode(new_dir, res->new_fattr);
2709 return 1;
2710}
2711
1da177e4
LT		 2712static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2713 struct inode *new_dir, struct qstr *new_name)
2714{
6caf2c82 2715 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2716 struct nfs_renameargs arg = {
1da177e4
LT		 2717 .old_dir = NFS_FH(old_dir),
2718 .new_dir = NFS_FH(new_dir),
2719 .old_name = old_name,
2720 .new_name = new_name,
6caf2c82
TM		 2721 .bitmask = server->attr_bitmask,
2722 };
e8582a8b 2723 struct nfs_renameres res = {
6caf2c82 2724 .server = server,
1da177e4 2725 };
1da177e4
LT		 2726 struct rpc_message msg = {
2727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2728 .rpc_argp = &arg,
2729 .rpc_resp = &res,
2730 };
011fff72 2731 int status = -ENOMEM;
1da177e4 2732
011fff72
TM		 2733 res.old_fattr = nfs_alloc_fattr();
2734 res.new_fattr = nfs_alloc_fattr();
2735 if (res.old_fattr == NULL || res.new_fattr == NULL)
2736 goto out;
1da177e4 2737
7c513058 2738 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2739 if (!status) {
2740 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2741 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2742 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2743 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2744 }
011fff72
TM		 2745out:
2746 nfs_free_fattr(res.new_fattr);
2747 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2748 return status;
2749}
2750
2751static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2752 struct inode *new_dir, struct qstr *new_name)
2753{
2754 struct nfs4_exception exception = { };
2755 int err;
2756 do {
2757 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2758 _nfs4_proc_rename(old_dir, old_name,
2759 new_dir, new_name),
2760 &exception);
2761 } while (exception.retry);
2762 return err;
2763}
2764
2765static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2766{
91ba2eee 2767 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2768 struct nfs4_link_arg arg = {
2769 .fh = NFS_FH(inode),
2770 .dir_fh = NFS_FH(dir),
2771 .name = name,
91ba2eee
TM		 2772 .bitmask = server->attr_bitmask,
2773 };
91ba2eee
TM		 2774 struct nfs4_link_res res = {
2775 .server = server,
1da177e4 2776 };
1da177e4
LT		 2777 struct rpc_message msg = {
2778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2779 .rpc_argp = &arg,
91ba2eee 2780 .rpc_resp = &res,
1da177e4 2781 };
136f2627
TM		 2782 int status = -ENOMEM;
2783
2784 res.fattr = nfs_alloc_fattr();
2785 res.dir_attr = nfs_alloc_fattr();
2786 if (res.fattr == NULL || res.dir_attr == NULL)
2787 goto out;
1da177e4 2788
7c513058 2789 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2790 if (!status) {
2791 update_changeattr(dir, &res.cinfo);
2792 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2793 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2794 }
136f2627
TM		 2795out:
2796 nfs_free_fattr(res.dir_attr);
2797 nfs_free_fattr(res.fattr);
1da177e4
LT		 2798 return status;
2799}
2800
2801static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2802{
2803 struct nfs4_exception exception = { };
2804 int err;
2805 do {
2806 err = nfs4_handle_exception(NFS_SERVER(inode),
2807 _nfs4_proc_link(inode, dir, name),
2808 &exception);
2809 } while (exception.retry);
2810 return err;
2811}
2812
57dc9a57
TM		 2813struct nfs4_createdata {
2814 struct rpc_message msg;
2815 struct nfs4_create_arg arg;
2816 struct nfs4_create_res res;
2817 struct nfs_fh fh;
2818 struct nfs_fattr fattr;
2819 struct nfs_fattr dir_fattr;
2820};
2821
2822static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2823 struct qstr *name, struct iattr *sattr, u32 ftype)
2824{
2825 struct nfs4_createdata *data;
2826
2827 data = kzalloc(sizeof(*data), GFP_KERNEL);
2828 if (data != NULL) {
2829 struct nfs_server *server = NFS_SERVER(dir);
2830
2831 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2832 data->msg.rpc_argp = &data->arg;
2833 data->msg.rpc_resp = &data->res;
2834 data->arg.dir_fh = NFS_FH(dir);
2835 data->arg.server = server;
2836 data->arg.name = name;
2837 data->arg.attrs = sattr;
2838 data->arg.ftype = ftype;
2839 data->arg.bitmask = server->attr_bitmask;
2840 data->res.server = server;
2841 data->res.fh = &data->fh;
2842 data->res.fattr = &data->fattr;
2843 data->res.dir_fattr = &data->dir_fattr;
2844 nfs_fattr_init(data->res.fattr);
2845 nfs_fattr_init(data->res.dir_fattr);
2846 }
2847 return data;
2848}
2849
2850static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2851{
7c513058 2852 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2853 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2854 if (status == 0) {
2855 update_changeattr(dir, &data->res.dir_cinfo);
2856 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2857 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2858 }
2859 return status;
2860}
2861
2862static void nfs4_free_createdata(struct nfs4_createdata *data)
2863{
2864 kfree(data);
2865}
2866
4f390c15 2867static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2868 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2869{
57dc9a57
TM		 2870 struct nfs4_createdata *data;
2871 int status = -ENAMETOOLONG;
1da177e4 2872
94a6d753 2873 if (len > NFS4_MAXPATHLEN)
57dc9a57 2874 goto out;
4f390c15 2875
57dc9a57
TM		 2876 status = -ENOMEM;
2877 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2878 if (data == NULL)
2879 goto out;
2880
2881 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2882 data->arg.u.symlink.pages = &page;
2883 data->arg.u.symlink.len = len;
1da177e4 2884
57dc9a57
TM		 2885 status = nfs4_do_create(dir, dentry, data);
2886
2887 nfs4_free_createdata(data);
2888out:
1da177e4
LT		 2889 return status;
2890}
2891
4f390c15 2892static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2893 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2894{
2895 struct nfs4_exception exception = { };
2896 int err;
2897 do {
2898 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2899 _nfs4_proc_symlink(dir, dentry, page,
2900 len, sattr),
1da177e4
LT		 2901 &exception);
2902 } while (exception.retry);
2903 return err;
2904}
2905
2906static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2907 struct iattr *sattr)
2908{
57dc9a57
TM		 2909 struct nfs4_createdata *data;
2910 int status = -ENOMEM;
1da177e4 2911
57dc9a57
TM		 2912 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2913 if (data == NULL)
2914 goto out;
2915
2916 status = nfs4_do_create(dir, dentry, data);
2917
2918 nfs4_free_createdata(data);
2919out:
1da177e4
LT		 2920 return status;
2921}
2922
2923static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2924 struct iattr *sattr)
2925{
2926 struct nfs4_exception exception = { };
2927 int err;
a8a5da99
AK		 2928
2929 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2930 do {
2931 err = nfs4_handle_exception(NFS_SERVER(dir),
2932 _nfs4_proc_mkdir(dir, dentry, sattr),
2933 &exception);
2934 } while (exception.retry);
2935 return err;
2936}
2937
2938static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2939 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2940{
2941 struct inode *dir = dentry->d_inode;
2942 struct nfs4_readdir_arg args = {
2943 .fh = NFS_FH(dir),
56e4ebf8 2944 .pages = pages,
1da177e4
LT		 2945 .pgbase = 0,
2946 .count = count,
96d25e53 2947 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2948 .plus = plus,
1da177e4
LT		 2949 };
2950 struct nfs4_readdir_res res;
2951 struct rpc_message msg = {
2952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2953 .rpc_argp = &args,
2954 .rpc_resp = &res,
2955 .rpc_cred = cred,
2956 };
2957 int status;
2958
3110ff80 2959 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2960 dentry->d_parent->d_name.name,
2961 dentry->d_name.name,
2962 (unsigned long long)cookie);
1da177e4
LT		 2963 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2964 res.pgbase = args.pgbase;
7c513058 2965 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 2966 if (status >= 0) {
1da177e4 2967 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2968 status += args.pgbase;
2969 }
c4812998
TM		 2970
2971 nfs_invalidate_atime(dir);
2972
3110ff80 2973 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2974 return status;
2975}
2976
2977static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2978 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2979{
2980 struct nfs4_exception exception = { };
2981 int err;
2982 do {
2983 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2984 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2985 pages, count, plus),
1da177e4
LT		 2986 &exception);
2987 } while (exception.retry);
2988 return err;
2989}
2990
2991static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2992 struct iattr *sattr, dev_t rdev)
2993{
57dc9a57
TM		 2994 struct nfs4_createdata *data;
2995 int mode = sattr->ia_mode;
2996 int status = -ENOMEM;
1da177e4
LT		 2997
2998 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2999 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3000
3001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3002 if (data == NULL)
3003 goto out;
3004
1da177e4 3005 if (S_ISFIFO(mode))
57dc9a57 3006 data->arg.ftype = NF4FIFO;
1da177e4 3007 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3008 data->arg.ftype = NF4BLK;
3009 data->arg.u.device.specdata1 = MAJOR(rdev);
3010 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3011 }
3012 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3013 data->arg.ftype = NF4CHR;
3014 data->arg.u.device.specdata1 = MAJOR(rdev);
3015 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3016 }
1da177e4 3017
57dc9a57
TM		 3018 status = nfs4_do_create(dir, dentry, data);
3019
3020 nfs4_free_createdata(data);
3021out:
1da177e4
LT		 3022 return status;
3023}
3024
3025static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3026 struct iattr *sattr, dev_t rdev)
3027{
3028 struct nfs4_exception exception = { };
3029 int err;
a8a5da99
AK		 3030
3031 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3032 do {
3033 err = nfs4_handle_exception(NFS_SERVER(dir),
3034 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3035 &exception);
3036 } while (exception.retry);
3037 return err;
3038}
3039
3040static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3041 struct nfs_fsstat *fsstat)
3042{
3043 struct nfs4_statfs_arg args = {
3044 .fh = fhandle,
3045 .bitmask = server->attr_bitmask,
3046 };
24ad148a
BH		 3047 struct nfs4_statfs_res res = {
3048 .fsstat = fsstat,
3049 };
1da177e4
LT		 3050 struct rpc_message msg = {
3051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3052 .rpc_argp = &args,
24ad148a 3053 .rpc_resp = &res,
1da177e4
LT		 3054 };
3055
0e574af1 3056 nfs_fattr_init(fsstat->fattr);
7c513058 3057 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3058}
3059
3060static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3061{
3062 struct nfs4_exception exception = { };
3063 int err;
3064 do {
3065 err = nfs4_handle_exception(server,
3066 _nfs4_proc_statfs(server, fhandle, fsstat),
3067 &exception);
3068 } while (exception.retry);
3069 return err;
3070}
3071
3072static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3073 struct nfs_fsinfo *fsinfo)
3074{
3075 struct nfs4_fsinfo_arg args = {
3076 .fh = fhandle,
3077 .bitmask = server->attr_bitmask,
3078 };
3dda5e43
BH		 3079 struct nfs4_fsinfo_res res = {
3080 .fsinfo = fsinfo,
3081 };
1da177e4
LT		 3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3084 .rpc_argp = &args,
3dda5e43 3085 .rpc_resp = &res,
1da177e4
LT		 3086 };
3087
7c513058 3088 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3089}
3090
3091static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3092{
3093 struct nfs4_exception exception = { };
3094 int err;
3095
3096 do {
3097 err = nfs4_handle_exception(server,
3098 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3099 &exception);
3100 } while (exception.retry);
3101 return err;
3102}
3103
3104static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3105{
0e574af1 3106 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3107 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3108}
3109
3110static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3111 struct nfs_pathconf *pathconf)
3112{
3113 struct nfs4_pathconf_arg args = {
3114 .fh = fhandle,
3115 .bitmask = server->attr_bitmask,
3116 };
d45b2989
BH		 3117 struct nfs4_pathconf_res res = {
3118 .pathconf = pathconf,
3119 };
1da177e4
LT		 3120 struct rpc_message msg = {
3121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3122 .rpc_argp = &args,
d45b2989 3123 .rpc_resp = &res,
1da177e4
LT		 3124 };
3125
3126 /* None of the pathconf attributes are mandatory to implement */
3127 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3128 memset(pathconf, 0, sizeof(*pathconf));
3129 return 0;
3130 }
3131
0e574af1 3132 nfs_fattr_init(pathconf->fattr);
7c513058 3133 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3134}
3135
3136static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3137 struct nfs_pathconf *pathconf)
3138{
3139 struct nfs4_exception exception = { };
3140 int err;
3141
3142 do {
3143 err = nfs4_handle_exception(server,
3144 _nfs4_proc_pathconf(server, fhandle, pathconf),
3145 &exception);
3146 } while (exception.retry);
3147 return err;
3148}
3149
cbdabc7f 3150static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3151{
ec06c096 3152 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3153
9e33bed5 3154 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3155 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3156 return -EAGAIN;
1da177e4 3157 }
8850df99
TM		 3158
3159 nfs_invalidate_atime(data->inode);
1da177e4 3160 if (task->tk_status > 0)
ec06c096
TM		 3161 renew_lease(server, data->timestamp);
3162 return 0;
1da177e4
LT		 3163}
3164
cbdabc7f
AA		 3165static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3166{
3167
3168 dprintk("--> %s\n", __func__);
3169
3170 if (!nfs4_sequence_done(task, &data->res.seq_res))
3171 return -EAGAIN;
3172
3173 return data->read_done_cb(task, data);
3174}
3175
bdc7f021 3176static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3177{
1da177e4 3178 data->timestamp = jiffies;
cbdabc7f 3179 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3180 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3181}
3182
cbdabc7f
AA		 3183/* Reset the the nfs_read_data to send the read to the MDS. */
3184void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3185{
3186 dprintk("%s Reset task for i/o through\n", __func__);
3187 put_lseg(data->lseg);
3188 data->lseg = NULL;
3189 /* offsets will differ in the dense stripe case */
3190 data->args.offset = data->mds_offset;
3191 data->ds_clp = NULL;
3192 data->args.fh = NFS_FH(data->inode);
3193 data->read_done_cb = nfs4_read_done_cb;
3194 task->tk_ops = data->mds_ops;
3195 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3196}
3197EXPORT_SYMBOL_GPL(nfs4_reset_read);
3198
b029bc9b 3199static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3200{
1da177e4
LT		 3201 struct inode *inode = data->inode;
3202
9e33bed5 3203 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3204 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3205 return -EAGAIN;
1da177e4 3206 }
4f9838c7 3207 if (task->tk_status >= 0) {
1da177e4 3208 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3209 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3210 }
788e7a89 3211 return 0;
1da177e4
LT		 3212}
3213
b029bc9b
FI		 3214static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3215{
3216 if (!nfs4_sequence_done(task, &data->res.seq_res))
3217 return -EAGAIN;
3218 return data->write_done_cb(task, data);
3219}
3220
a69aef14
FI		 3221/* Reset the the nfs_write_data to send the write to the MDS. */
3222void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3223{
3224 dprintk("%s Reset task for i/o through\n", __func__);
3225 put_lseg(data->lseg);
3226 data->lseg = NULL;
3227 data->ds_clp = NULL;
3228 data->write_done_cb = nfs4_write_done_cb;
3229 data->args.fh = NFS_FH(data->inode);
3230 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3231 data->args.offset = data->mds_offset;
3232 data->res.fattr = &data->fattr;
3233 task->tk_ops = data->mds_ops;
3234 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3235}
3236EXPORT_SYMBOL_GPL(nfs4_reset_write);
3237
bdc7f021 3238static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3239{
bdc7f021
TM		 3240 struct nfs_server *server = NFS_SERVER(data->inode);
3241
7ffd1064
FI		 3242 if (data->lseg) {
3243 data->args.bitmask = NULL;
3244 data->res.fattr = NULL;
3245 } else
3246 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3247 if (!data->write_done_cb)
3248 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3249 data->res.server = server;
1da177e4
LT		 3250 data->timestamp = jiffies;
3251
bdc7f021 3252 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3253}
3254
5f452431 3255static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3256{
1da177e4 3257 struct inode *inode = data->inode;
14516c3a 3258
9e33bed5 3259 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3260 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3261 return -EAGAIN;
1da177e4 3262 }
9e08a3c5 3263 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3264 return 0;
1da177e4
LT		 3265}
3266
5f452431
FI		 3267static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3268{
3269 if (!nfs4_sequence_done(task, &data->res.seq_res))
3270 return -EAGAIN;
3271 return data->write_done_cb(task, data);
3272}
3273
bdc7f021 3274static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3275{
788e7a89 3276 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3277
3278 if (data->lseg) {
3279 data->args.bitmask = NULL;
3280 data->res.fattr = NULL;
3281 } else
3282 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3283 if (!data->write_done_cb)
3284 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3285 data->res.server = server;
bdc7f021 3286 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3287}
3288
9bc4e3ca
CL		 3289struct nfs4_renewdata {
3290 struct nfs_client *client;
3291 unsigned long timestamp;
3292};
3293
1da177e4
LT		 3294/*
3295 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3296 * standalone procedure for queueing an asynchronous RENEW.
3297 */
9bc4e3ca 3298static void nfs4_renew_release(void *calldata)
dc96aef9 3299{
9bc4e3ca
CL		 3300 struct nfs4_renewdata *data = calldata;
3301 struct nfs_client *clp = data->client;
dc96aef9 3302
0851de06
AB		 3303 if (atomic_read(&clp->cl_count) > 1)
3304 nfs4_schedule_state_renewal(clp);
3305 nfs_put_client(clp);
9bc4e3ca 3306 kfree(data);
dc96aef9
AB		 3307}
3308
9bc4e3ca 3309static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3310{
9bc4e3ca
CL		 3311 struct nfs4_renewdata *data = calldata;
3312 struct nfs_client *clp = data->client;
3313 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3314
3315 if (task->tk_status < 0) {
95baa25c
TM		 3316 /* Unless we're shutting down, schedule state recovery! */
3317 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3318 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3319 return;
3320 }
452e9352 3321 do_renew_lease(clp, timestamp);
1da177e4
LT		 3322}
3323
963d8fe5
TM		 3324static const struct rpc_call_ops nfs4_renew_ops = {
3325 .rpc_call_done = nfs4_renew_done,
dc96aef9 3326 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3327};
3328
adfa6f98 3329int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3330{
3331 struct rpc_message msg = {
3332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3333 .rpc_argp = clp,
b4454fe1 3334 .rpc_cred = cred,
1da177e4 3335 };
9bc4e3ca 3336 struct nfs4_renewdata *data;
1da177e4 3337
0851de06
AB		 3338 if (!atomic_inc_not_zero(&clp->cl_count))
3339 return -EIO;
9bc4e3ca
CL		 3340 data = kmalloc(sizeof(*data), GFP_KERNEL);
3341 if (data == NULL)
3342 return -ENOMEM;
3343 data->client = clp;
3344 data->timestamp = jiffies;
1da177e4 3345 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3346 &nfs4_renew_ops, data);
1da177e4
LT		 3347}
3348
adfa6f98 3349int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3350{
3351 struct rpc_message msg = {
3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3353 .rpc_argp = clp,
b4454fe1 3354 .rpc_cred = cred,
1da177e4
LT		 3355 };
3356 unsigned long now = jiffies;
3357 int status;
3358
3359 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3360 if (status < 0)
3361 return status;
452e9352 3362 do_renew_lease(clp, now);
1da177e4
LT		 3363 return 0;
3364}
3365
aa1870af
BF		 3366static inline int nfs4_server_supports_acls(struct nfs_server *server)
3367{
3368 return (server->caps & NFS_CAP_ACLS)
3369 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3370 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3371}
3372
3373/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3374 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3375 * the stack.
3376 */
3377#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3378
3379static void buf_to_pages(const void *buf, size_t buflen,
3380 struct page **pages, unsigned int *pgbase)
3381{
3382 const void *p = buf;
3383
3384 *pgbase = offset_in_page(buf);
3385 p -= *pgbase;
3386 while (p < buf + buflen) {
3387 *(pages++) = virt_to_page(p);
3388 p += PAGE_CACHE_SIZE;
3389 }
3390}
3391
e9e3d724
NH		 3392static int buf_to_pages_noslab(const void *buf, size_t buflen,
3393 struct page **pages, unsigned int *pgbase)
3394{
3395 struct page *newpage, **spages;
3396 int rc = 0;
3397 size_t len;
3398 spages = pages;
3399
3400 do {
43b7c3f0 3401 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3402 newpage = alloc_page(GFP_KERNEL);
3403
3404 if (newpage == NULL)
3405 goto unwind;
3406 memcpy(page_address(newpage), buf, len);
3407 buf += len;
3408 buflen -= len;
3409 *pages++ = newpage;
3410 rc++;
3411 } while (buflen != 0);
3412
3413 return rc;
3414
3415unwind:
3416 for(; rc > 0; rc--)
3417 __free_page(spages[rc-1]);
3418 return -ENOMEM;
3419}
3420
e50a1c2e
BF		 3421struct nfs4_cached_acl {
3422 int cached;
3423 size_t len;
3e9d4154 3424 char data[0];
e50a1c2e
BF		 3425};
3426
3427static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3428{
3429 struct nfs_inode *nfsi = NFS_I(inode);
3430
3431 spin_lock(&inode->i_lock);
3432 kfree(nfsi->nfs4_acl);
3433 nfsi->nfs4_acl = acl;
3434 spin_unlock(&inode->i_lock);
3435}
3436
3437static void nfs4_zap_acl_attr(struct inode *inode)
3438{
3439 nfs4_set_cached_acl(inode, NULL);
3440}
3441
3442static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3443{
3444 struct nfs_inode *nfsi = NFS_I(inode);
3445 struct nfs4_cached_acl *acl;
3446 int ret = -ENOENT;
3447
3448 spin_lock(&inode->i_lock);
3449 acl = nfsi->nfs4_acl;
3450 if (acl == NULL)
3451 goto out;
3452 if (buf == NULL) /* user is just asking for length */
3453 goto out_len;
3454 if (acl->cached == 0)
3455 goto out;
3456 ret = -ERANGE; /* see getxattr(2) man page */
3457 if (acl->len > buflen)
3458 goto out;
3459 memcpy(buf, acl->data, acl->len);
3460out_len:
3461 ret = acl->len;
3462out:
3463 spin_unlock(&inode->i_lock);
3464 return ret;
3465}
3466
3467static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3468{
3469 struct nfs4_cached_acl *acl;
3470
3471 if (buf && acl_len <= PAGE_SIZE) {
3472 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3473 if (acl == NULL)
3474 goto out;
3475 acl->cached = 1;
3476 memcpy(acl->data, buf, acl_len);
3477 } else {
3478 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3479 if (acl == NULL)
3480 goto out;
3481 acl->cached = 0;
3482 }
3483 acl->len = acl_len;
3484out:
3485 nfs4_set_cached_acl(inode, acl);
3486}
3487
16b4289c 3488static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3489{
aa1870af
BF		 3490 struct page *pages[NFS4ACL_MAXPAGES];
3491 struct nfs_getaclargs args = {
3492 .fh = NFS_FH(inode),
3493 .acl_pages = pages,
3494 .acl_len = buflen,
3495 };
663c79b3
BH		 3496 struct nfs_getaclres res = {
3497 .acl_len = buflen,
3498 };
e50a1c2e 3499 void *resp_buf;
aa1870af
BF		 3500 struct rpc_message msg = {
3501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3502 .rpc_argp = &args,
663c79b3 3503 .rpc_resp = &res,
aa1870af 3504 };
e50a1c2e 3505 struct page *localpage = NULL;
aa1870af
BF		 3506 int ret;
3507
e50a1c2e
BF		 3508 if (buflen < PAGE_SIZE) {
3509 /* As long as we're doing a round trip to the server anyway,
3510 * let's be prepared for a page of acl data. */
3511 localpage = alloc_page(GFP_KERNEL);
3512 resp_buf = page_address(localpage);
3513 if (localpage == NULL)
3514 return -ENOMEM;
3515 args.acl_pages[0] = localpage;
3516 args.acl_pgbase = 0;
663c79b3 3517 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3518 } else {
3519 resp_buf = buf;
3520 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3521 }
7c513058 3522 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3523 if (ret)
3524 goto out_free;
663c79b3
BH		 3525 if (res.acl_len > args.acl_len)
3526 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3527 else
663c79b3 3528 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3529 if (buf) {
3530 ret = -ERANGE;
663c79b3 3531 if (res.acl_len > buflen)
e50a1c2e
BF		 3532 goto out_free;
3533 if (localpage)
663c79b3 3534 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3535 }
663c79b3 3536 ret = res.acl_len;
e50a1c2e
BF		 3537out_free:
3538 if (localpage)
3539 __free_page(localpage);
aa1870af
BF		 3540 return ret;
3541}
3542
16b4289c
TM		 3543static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3544{
3545 struct nfs4_exception exception = { };
3546 ssize_t ret;
3547 do {
3548 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3549 if (ret >= 0)
3550 break;
3551 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3552 } while (exception.retry);
3553 return ret;
3554}
3555
e50a1c2e
BF		 3556static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3557{
3558 struct nfs_server *server = NFS_SERVER(inode);
3559 int ret;
3560
3561 if (!nfs4_server_supports_acls(server))
3562 return -EOPNOTSUPP;
3563 ret = nfs_revalidate_inode(server, inode);
3564 if (ret < 0)
3565 return ret;
08a22b39
AK		 3566 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3567 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3568 ret = nfs4_read_cached_acl(inode, buf, buflen);
3569 if (ret != -ENOENT)
3570 return ret;
3571 return nfs4_get_acl_uncached(inode, buf, buflen);
3572}
3573
16b4289c 3574static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3575{
3576 struct nfs_server *server = NFS_SERVER(inode);
3577 struct page *pages[NFS4ACL_MAXPAGES];
3578 struct nfs_setaclargs arg = {
3579 .fh = NFS_FH(inode),
3580 .acl_pages = pages,
3581 .acl_len = buflen,
3582 };
73c403a9 3583 struct nfs_setaclres res;
4b580ee3
BF		 3584 struct rpc_message msg = {
3585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3586 .rpc_argp = &arg,
73c403a9 3587 .rpc_resp = &res,
4b580ee3 3588 };
e9e3d724 3589 int ret, i;
4b580ee3
BF		 3590
3591 if (!nfs4_server_supports_acls(server))
3592 return -EOPNOTSUPP;
e9e3d724
NH		 3593 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3594 if (i < 0)
3595 return i;
642ac549 3596 nfs_inode_return_delegation(inode);
7c513058 3597 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3598
3599 /*
3600 * Free each page after tx, so the only ref left is
3601 * held by the network stack
3602 */
3603 for (; i > 0; i--)
3604 put_page(pages[i-1]);
3605
08a22b39
AK		 3606 /*
3607 * Acl update can result in inode attribute update.
3608 * so mark the attribute cache invalid.
3609 */
3610 spin_lock(&inode->i_lock);
3611 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3612 spin_unlock(&inode->i_lock);
f41f7418
TM		 3613 nfs_access_zap_cache(inode);
3614 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3615 return ret;
3616}
3617
16b4289c
TM		 3618static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3619{
3620 struct nfs4_exception exception = { };
3621 int err;
3622 do {
3623 err = nfs4_handle_exception(NFS_SERVER(inode),
3624 __nfs4_proc_set_acl(inode, buf, buflen),
3625 &exception);
3626 } while (exception.retry);
3627 return err;
3628}
3629
1da177e4 3630static int
aa5190d0 3631nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3632{
aa5190d0
TM		 3633 struct nfs_client *clp = server->nfs_client;
3634
3635 if (task->tk_status >= 0)
1da177e4
LT		 3636 return 0;
3637 switch(task->tk_status) {
9e33bed5
TM		 3638 case -NFS4ERR_ADMIN_REVOKED:
3639 case -NFS4ERR_BAD_STATEID:
3640 case -NFS4ERR_OPENMODE:
3641 if (state == NULL)
3642 break;
0400a6b0
TM		 3643 nfs4_schedule_stateid_recovery(server, state);
3644 goto wait_on_recovery;
1da177e4 3645 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3646 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3647 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3648 nfs4_schedule_lease_recovery(clp);
3649 goto wait_on_recovery;
4745e315
AA		 3650#if defined(CONFIG_NFS_V4_1)
3651 case -NFS4ERR_BADSESSION:
3652 case -NFS4ERR_BADSLOT:
3653 case -NFS4ERR_BAD_HIGH_SLOT:
3654 case -NFS4ERR_DEADSESSION:
3655 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3656 case -NFS4ERR_SEQ_FALSE_RETRY:
3657 case -NFS4ERR_SEQ_MISORDERED:
3658 dprintk("%s ERROR %d, Reset session\n", __func__,
3659 task->tk_status);
0400a6b0 3660 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3661 task->tk_status = 0;
3662 return -EAGAIN;
3663#endif /* CONFIG_NFS_V4_1 */
1da177e4 3664 case -NFS4ERR_DELAY:
aa5190d0 3665 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3666 case -NFS4ERR_GRACE:
2c643488 3667 case -EKEYEXPIRED:
1da177e4
LT		 3668 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3669 task->tk_status = 0;
3670 return -EAGAIN;
3671 case -NFS4ERR_OLD_STATEID:
3672 task->tk_status = 0;
3673 return -EAGAIN;
3674 }
3675 task->tk_status = nfs4_map_errors(task->tk_status);
3676 return 0;
0400a6b0 3677wait_on_recovery:
a2c0b9e2 3678 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3679 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3680 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3681 task->tk_status = 0;
3682 return -EAGAIN;
1da177e4
LT		 3683}
3684
bb8b27e5
TM		 3685int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3686 unsigned short port, struct rpc_cred *cred,
3687 struct nfs4_setclientid_res *res)
1da177e4
LT		 3688{
3689 nfs4_verifier sc_verifier;
3690 struct nfs4_setclientid setclientid = {
3691 .sc_verifier = &sc_verifier,
3692 .sc_prog = program,
f4eecd5d 3693 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3694 };
3695 struct rpc_message msg = {
3696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3697 .rpc_argp = &setclientid,
bb8b27e5 3698 .rpc_resp = res,
286d7d6a 3699 .rpc_cred = cred,
1da177e4 3700 };
bc4785cd 3701 __be32 *p;
1da177e4
LT		 3702 int loop = 0;
3703 int status;
3704
bc4785cd 3705 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3706 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3707 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3708
3709 for(;;) {
3710 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3711 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3712 clp->cl_ipaddr,
3713 rpc_peeraddr2str(clp->cl_rpcclient,
3714 RPC_DISPLAY_ADDR),
69dd716c
TM		 3715 rpc_peeraddr2str(clp->cl_rpcclient,
3716 RPC_DISPLAY_PROTO),
78ea323b 3717 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3718 clp->cl_id_uniquifier);
3719 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3720 sizeof(setclientid.sc_netid),
3721 rpc_peeraddr2str(clp->cl_rpcclient,
3722 RPC_DISPLAY_NETID));
1da177e4 3723 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3724 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3725 clp->cl_ipaddr, port >> 8, port & 255);
3726
3727 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3728 if (status != -NFS4ERR_CLID_INUSE)
3729 break;
3730 if (signalled())
3731 break;
3732 if (loop++ & 1)
611c96c8 3733 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3734 else
3735 if (++clp->cl_id_uniquifier == 0)
3736 break;
3737 }
3738 return status;
3739}
3740
bb8b27e5
TM		 3741static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3742 struct nfs4_setclientid_res *arg,
3743 struct rpc_cred *cred)
1da177e4
LT		 3744{
3745 struct nfs_fsinfo fsinfo;
3746 struct rpc_message msg = {
3747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3748 .rpc_argp = arg,
1da177e4 3749 .rpc_resp = &fsinfo,
286d7d6a 3750 .rpc_cred = cred,
1da177e4
LT		 3751 };
3752 unsigned long now;
3753 int status;
3754
3755 now = jiffies;
3756 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3757 if (status == 0) {
3758 spin_lock(&clp->cl_lock);
3759 clp->cl_lease_time = fsinfo.lease_time * HZ;
3760 clp->cl_last_renewal = now;
3761 spin_unlock(&clp->cl_lock);
3762 }
3763 return status;
3764}
3765
bb8b27e5
TM		 3766int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3767 struct nfs4_setclientid_res *arg,
3768 struct rpc_cred *cred)
51581f3b 3769{
77e03677 3770 long timeout = 0;
51581f3b
TM		 3771 int err;
3772 do {
bb8b27e5 3773 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3774 switch (err) {
3775 case 0:
3776 return err;
3777 case -NFS4ERR_RESOURCE:
3778 /* The IBM lawyers misread another document! */
3779 case -NFS4ERR_DELAY:
3780 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3781 }
3782 } while (err == 0);
3783 return err;
3784}
3785
fe650407
TM		 3786struct nfs4_delegreturndata {
3787 struct nfs4_delegreturnargs args;
fa178f29 3788 struct nfs4_delegreturnres res;
fe650407
TM		 3789 struct nfs_fh fh;
3790 nfs4_stateid stateid;
26e976a8 3791 unsigned long timestamp;
fa178f29 3792 struct nfs_fattr fattr;
fe650407
TM		 3793 int rpc_status;
3794};
3795
fe650407
TM		 3796static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3797{
3798 struct nfs4_delegreturndata *data = calldata;
938e1010 3799
14516c3a
TM		 3800 if (!nfs4_sequence_done(task, &data->res.seq_res))
3801 return;
938e1010 3802
79708861
RL		 3803 switch (task->tk_status) {
3804 case -NFS4ERR_STALE_STATEID:
3805 case -NFS4ERR_EXPIRED:
3806 case 0:
fa178f29 3807 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3808 break;
3809 default:
3810 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3811 -EAGAIN) {
3812 nfs_restart_rpc(task, data->res.server->nfs_client);
3813 return;
3814 }
3815 }
3816 data->rpc_status = task->tk_status;
fe650407
TM		 3817}
3818
3819static void nfs4_delegreturn_release(void *calldata)
3820{
fe650407
TM		 3821 kfree(calldata);
3822}
3823
938e1010
AA		 3824#if defined(CONFIG_NFS_V4_1)
3825static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3826{
3827 struct nfs4_delegreturndata *d_data;
3828
3829 d_data = (struct nfs4_delegreturndata *)data;
3830
035168ab 3831 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3832 &d_data->args.seq_args,
3833 &d_data->res.seq_res, 1, task))
3834 return;
3835 rpc_call_start(task);
3836}
3837#endif /* CONFIG_NFS_V4_1 */
3838
c8d149f3 3839static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3840#if defined(CONFIG_NFS_V4_1)
3841 .rpc_call_prepare = nfs4_delegreturn_prepare,
3842#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3843 .rpc_call_done = nfs4_delegreturn_done,
3844 .rpc_release = nfs4_delegreturn_release,
3845};
3846
e6f81075 3847static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3848{
3849 struct nfs4_delegreturndata *data;
fa178f29 3850 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3851 struct rpc_task *task;
5138fde0
TM		 3852 struct rpc_message msg = {
3853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3854 .rpc_cred = cred,
3855 };
c970aa85
TM		 3856 struct rpc_task_setup task_setup_data = {
3857 .rpc_client = server->client,
5138fde0 3858 .rpc_message = &msg,
c970aa85
TM		 3859 .callback_ops = &nfs4_delegreturn_ops,
3860 .flags = RPC_TASK_ASYNC,
3861 };
e6f81075 3862 int status = 0;
fe650407 3863
8535b2be 3864 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3865 if (data == NULL)
3866 return -ENOMEM;
3867 data->args.fhandle = &data->fh;
3868 data->args.stateid = &data->stateid;
fa178f29 3869 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3870 nfs_copy_fh(&data->fh, NFS_FH(inode));
3871 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3872 data->res.fattr = &data->fattr;
3873 data->res.server = server;
5138fde0 3874 nfs_fattr_init(data->res.fattr);
26e976a8 3875 data->timestamp = jiffies;
fe650407
TM		 3876 data->rpc_status = 0;
3877
c970aa85 3878 task_setup_data.callback_data = data;
1174dd1f
TM		 3879 msg.rpc_argp = &data->args;
3880 msg.rpc_resp = &data->res;
c970aa85 3881 task = rpc_run_task(&task_setup_data);
7a1218a2 3882 if (IS_ERR(task))
fe650407 3883 return PTR_ERR(task);
e6f81075
TM		 3884 if (!issync)
3885 goto out;
fe650407 3886 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3887 if (status != 0)
3888 goto out;
3889 status = data->rpc_status;
3890 if (status != 0)
3891 goto out;
3892 nfs_refresh_inode(inode, &data->fattr);
3893out:
e6b3c4db 3894 rpc_put_task(task);
fe650407 3895 return status;
1da177e4
LT		 3896}
3897
e6f81075 3898int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3899{
3900 struct nfs_server *server = NFS_SERVER(inode);
3901 struct nfs4_exception exception = { };
3902 int err;
3903 do {
e6f81075 3904 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3905 switch (err) {
3906 case -NFS4ERR_STALE_STATEID:
3907 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3908 case 0:
3909 return 0;
3910 }
3911 err = nfs4_handle_exception(server, err, &exception);
3912 } while (exception.retry);
3913 return err;
3914}
3915
3916#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3917#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3918
3919/*
3920 * sleep, with exponential backoff, and retry the LOCK operation.
3921 */
3922static unsigned long
3923nfs4_set_lock_task_retry(unsigned long timeout)
3924{
150030b7 3925 schedule_timeout_killable(timeout);
1da177e4
LT		 3926 timeout <<= 1;
3927 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3928 return NFS4_LOCK_MAXTIMEOUT;
3929 return timeout;
3930}
3931
1da177e4
LT		 3932static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3933{
3934 struct inode *inode = state->inode;
3935 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3936 struct nfs_client *clp = server->nfs_client;
911d1aaf 3937 struct nfs_lockt_args arg = {
1da177e4 3938 .fh = NFS_FH(inode),
911d1aaf 3939 .fl = request,
1da177e4 3940 };
911d1aaf
TM		 3941 struct nfs_lockt_res res = {
3942 .denied = request,
1da177e4
LT		 3943 };
3944 struct rpc_message msg = {
3945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3946 .rpc_argp = &arg,
3947 .rpc_resp = &res,
3948 .rpc_cred = state->owner->so_cred,
3949 };
1da177e4
LT		 3950 struct nfs4_lock_state *lsp;
3951 int status;
3952
911d1aaf 3953 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3954 status = nfs4_set_lock_state(state, request);
3955 if (status != 0)
3956 goto out;
3957 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3958 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3959 arg.lock_owner.s_dev = server->s_dev;
7c513058 3960 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 3961 switch (status) {
3962 case 0:
3963 request->fl_type = F_UNLCK;
3964 break;
3965 case -NFS4ERR_DENIED:
3966 status = 0;
1da177e4 3967 }
70cc6487 3968 request->fl_ops->fl_release_private(request);
8d0a8a9d 3969out:
1da177e4
LT		 3970 return status;
3971}
3972
3973static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3974{
3975 struct nfs4_exception exception = { };
3976 int err;
3977
3978 do {
3979 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3980 _nfs4_proc_getlk(state, cmd, request),
3981 &exception);
3982 } while (exception.retry);
3983 return err;
3984}
3985
3986static int do_vfs_lock(struct file *file, struct file_lock *fl)
3987{
3988 int res = 0;
3989 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3990 case FL_POSIX:
3991 res = posix_lock_file_wait(file, fl);
3992 break;
3993 case FL_FLOCK:
3994 res = flock_lock_file_wait(file, fl);
3995 break;
3996 default:
3997 BUG();
3998 }
1da177e4
LT		 3999 return res;
4000}
4001
faf5f49c 4002struct nfs4_unlockdata {
911d1aaf
TM		 4003 struct nfs_locku_args arg;
4004 struct nfs_locku_res res;
faf5f49c
TM		 4005 struct nfs4_lock_state *lsp;
4006 struct nfs_open_context *ctx;
911d1aaf
TM		 4007 struct file_lock fl;
4008 const struct nfs_server *server;
26e976a8 4009 unsigned long timestamp;
faf5f49c
TM		 4010};
4011
911d1aaf
TM		 4012static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4013 struct nfs_open_context *ctx,
4014 struct nfs4_lock_state *lsp,
4015 struct nfs_seqid *seqid)
4016{
4017 struct nfs4_unlockdata *p;
4018 struct inode *inode = lsp->ls_state->inode;
4019
8535b2be 4020 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4021 if (p == NULL)
4022 return NULL;
4023 p->arg.fh = NFS_FH(inode);
4024 p->arg.fl = &p->fl;
4025 p->arg.seqid = seqid;
c1d51931 4026 p->res.seqid = seqid;
911d1aaf
TM		 4027 p->arg.stateid = &lsp->ls_stateid;
4028 p->lsp = lsp;
4029 atomic_inc(&lsp->ls_count);
4030 /* Ensure we don't close file until we're done freeing locks! */
4031 p->ctx = get_nfs_open_context(ctx);
4032 memcpy(&p->fl, fl, sizeof(p->fl));
4033 p->server = NFS_SERVER(inode);
4034 return p;
4035}
4036
06f814a3 4037static void nfs4_locku_release_calldata(void *data)
faf5f49c 4038{
963d8fe5 4039 struct nfs4_unlockdata *calldata = data;
911d1aaf 4040 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4041 nfs4_put_lock_state(calldata->lsp);
4042 put_nfs_open_context(calldata->ctx);
4043 kfree(calldata);
faf5f49c
TM		 4044}
4045
963d8fe5 4046static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4047{
963d8fe5 4048 struct nfs4_unlockdata *calldata = data;
faf5f49c 4049
14516c3a
TM		 4050 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4051 return;
faf5f49c
TM		 4052 switch (task->tk_status) {
4053 case 0:
4054 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4055 calldata->res.stateid.data,
faf5f49c 4056 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4057 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4058 break;
9e33bed5
TM		 4059 case -NFS4ERR_BAD_STATEID:
4060 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4061 case -NFS4ERR_STALE_STATEID:
4062 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4063 break;
4064 default:
9e33bed5 4065 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4066 nfs_restart_rpc(task,
d61e612a 4067 calldata->server->nfs_client);
faf5f49c 4068 }
faf5f49c
TM		 4069}
4070
4ce70ada 4071static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4072{
4ce70ada 4073 struct nfs4_unlockdata *calldata = data;
faf5f49c 4074
911d1aaf 4075 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4076 return;
4077 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4078 /* Note: exit _without_ running nfs4_locku_done */
4079 task->tk_action = NULL;
faf5f49c
TM		 4080 return;
4081 }
26e976a8 4082 calldata->timestamp = jiffies;
035168ab 4083 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4084 &calldata->arg.seq_args,
4085 &calldata->res.seq_res, 1, task))
4086 return;
5138fde0 4087 rpc_call_start(task);
faf5f49c
TM		 4088}
4089
963d8fe5 4090static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4091 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4092 .rpc_call_done = nfs4_locku_done,
06f814a3 4093 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4094};
4095
a5d16a4d
TM		 4096static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4097 struct nfs_open_context *ctx,
4098 struct nfs4_lock_state *lsp,
4099 struct nfs_seqid *seqid)
4100{
4101 struct nfs4_unlockdata *data;
5138fde0
TM		 4102 struct rpc_message msg = {
4103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4104 .rpc_cred = ctx->cred,
4105 };
c970aa85
TM		 4106 struct rpc_task_setup task_setup_data = {
4107 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4108 .rpc_message = &msg,
c970aa85 4109 .callback_ops = &nfs4_locku_ops,
101070ca 4110 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4111 .flags = RPC_TASK_ASYNC,
4112 };
a5d16a4d 4113
137d6aca
FF		 4114 /* Ensure this is an unlock - when canceling a lock, the
4115 * canceled lock is passed in, and it won't be an unlock.
4116 */
4117 fl->fl_type = F_UNLCK;
4118
a5d16a4d
TM		 4119 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4120 if (data == NULL) {
4121 nfs_free_seqid(seqid);
4122 return ERR_PTR(-ENOMEM);
4123 }
4124
1174dd1f
TM		 4125 msg.rpc_argp = &data->arg;
4126 msg.rpc_resp = &data->res;
c970aa85
TM		 4127 task_setup_data.callback_data = data;
4128 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4129}
4130
faf5f49c
TM		 4131static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4132{
19e03c57 4133 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4134 struct nfs_seqid *seqid;
1da177e4 4135 struct nfs4_lock_state *lsp;
06f814a3
TM		 4136 struct rpc_task *task;
4137 int status = 0;
536ff0f8 4138 unsigned char fl_flags = request->fl_flags;
faf5f49c 4139
8d0a8a9d 4140 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4141 /* Unlock _before_ we do the RPC call */
4142 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4143 down_read(&nfsi->rwsem);
4144 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4145 up_read(&nfsi->rwsem);
9b073574 4146 goto out;
19e03c57
TM		 4147 }
4148 up_read(&nfsi->rwsem);
8d0a8a9d 4149 if (status != 0)
9b073574
TM		 4150 goto out;
4151 /* Is this a delegated lock? */
4152 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4153 goto out;
8d0a8a9d 4154 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4155 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4156 status = -ENOMEM;
911d1aaf 4157 if (seqid == NULL)
9b073574 4158 goto out;
cd3758e3 4159 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4160 status = PTR_ERR(task);
4161 if (IS_ERR(task))
9b073574 4162 goto out;
a5d16a4d 4163 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4164 rpc_put_task(task);
9b073574 4165out:
536ff0f8 4166 request->fl_flags = fl_flags;
1da177e4
LT		 4167 return status;
4168}
4169
a5d16a4d
TM		 4170struct nfs4_lockdata {
4171 struct nfs_lock_args arg;
4172 struct nfs_lock_res res;
4173 struct nfs4_lock_state *lsp;
4174 struct nfs_open_context *ctx;
4175 struct file_lock fl;
26e976a8 4176 unsigned long timestamp;
a5d16a4d
TM		 4177 int rpc_status;
4178 int cancelled;
66179efe 4179 struct nfs_server *server;
a5d16a4d
TM		 4180};
4181
4182static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4183 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4184 gfp_t gfp_mask)
1da177e4 4185{
a5d16a4d
TM		 4186 struct nfs4_lockdata *p;
4187 struct inode *inode = lsp->ls_state->inode;
1da177e4 4188 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4189
8535b2be 4190 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4191 if (p == NULL)
4192 return NULL;
4193
4194 p->arg.fh = NFS_FH(inode);
4195 p->arg.fl = &p->fl;
8535b2be 4196 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4197 if (p->arg.open_seqid == NULL)
4198 goto out_free;
8535b2be 4199 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4200 if (p->arg.lock_seqid == NULL)
2f74c0a0 4201 goto out_free_seqid;
a5d16a4d 4202 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4203 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4204 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4205 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4206 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4207 p->lsp = lsp;
66179efe 4208 p->server = server;
a5d16a4d
TM		 4209 atomic_inc(&lsp->ls_count);
4210 p->ctx = get_nfs_open_context(ctx);
4211 memcpy(&p->fl, fl, sizeof(p->fl));
4212 return p;
2f74c0a0
TM		 4213out_free_seqid:
4214 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4215out_free:
4216 kfree(p);
4217 return NULL;
4218}
4219
4220static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4221{
4222 struct nfs4_lockdata *data = calldata;
4223 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4224
3110ff80 4225 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4226 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4227 return;
a5d16a4d
TM		 4228 /* Do we need to do an open_to_lock_owner? */
4229 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4230 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4231 return;
a5d16a4d
TM		 4232 data->arg.open_stateid = &state->stateid;
4233 data->arg.new_lock_owner = 1;
c1d51931 4234 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4235 } else
4236 data->arg.new_lock_owner = 0;
26e976a8 4237 data->timestamp = jiffies;
035168ab
TM		 4238 if (nfs4_setup_sequence(data->server,
4239 &data->arg.seq_args,
66179efe
AA		 4240 &data->res.seq_res, 1, task))
4241 return;
5138fde0 4242 rpc_call_start(task);
3110ff80 4243 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4244}
4245
b257957e
AB		 4246static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4247{
4248 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4249 nfs4_lock_prepare(task, calldata);
4250}
4251
a5d16a4d
TM		 4252static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4253{
4254 struct nfs4_lockdata *data = calldata;
4255
3110ff80 4256 dprintk("%s: begin!\n", __func__);
a5d16a4d 4257
14516c3a
TM		 4258 if (!nfs4_sequence_done(task, &data->res.seq_res))
4259 return;
66179efe 4260
a5d16a4d 4261 data->rpc_status = task->tk_status;
a5d16a4d 4262 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4263 if (data->rpc_status == 0)
4264 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4265 else
4266 goto out;
4267 }
4268 if (data->rpc_status == 0) {
4269 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4270 sizeof(data->lsp->ls_stateid.data));
4271 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4272 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4273 }
a5d16a4d 4274out:
3110ff80 4275 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4276}
4277
4278static void nfs4_lock_release(void *calldata)
4279{
4280 struct nfs4_lockdata *data = calldata;
4281
3110ff80 4282 dprintk("%s: begin!\n", __func__);
2f74c0a0 4283 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4284 if (data->cancelled != 0) {
4285 struct rpc_task *task;
4286 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4287 data->arg.lock_seqid);
4288 if (!IS_ERR(task))
bf294b41 4289 rpc_put_task_async(task);
3110ff80 4290 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4291 } else
4292 nfs_free_seqid(data->arg.lock_seqid);
4293 nfs4_put_lock_state(data->lsp);
4294 put_nfs_open_context(data->ctx);
4295 kfree(data);
3110ff80 4296 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4297}
4298
4299static const struct rpc_call_ops nfs4_lock_ops = {
4300 .rpc_call_prepare = nfs4_lock_prepare,
4301 .rpc_call_done = nfs4_lock_done,
4302 .rpc_release = nfs4_lock_release,
4303};
4304
b257957e
AB		 4305static const struct rpc_call_ops nfs4_recover_lock_ops = {
4306 .rpc_call_prepare = nfs4_recover_lock_prepare,
4307 .rpc_call_done = nfs4_lock_done,
4308 .rpc_release = nfs4_lock_release,
4309};
4310
2bee72a6
TM		 4311static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4312{
2bee72a6
TM		 4313 switch (error) {
4314 case -NFS4ERR_ADMIN_REVOKED:
4315 case -NFS4ERR_BAD_STATEID:
ecac799a 4316 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4317 if (new_lock_owner != 0 ||
4318 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4319 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4320 break;
4321 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4322 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4323 case -NFS4ERR_EXPIRED:
4324 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4325 };
4326}
4327
afe6c27c 4328static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4329{
4330 struct nfs4_lockdata *data;
4331 struct rpc_task *task;
5138fde0
TM		 4332 struct rpc_message msg = {
4333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4334 .rpc_cred = state->owner->so_cred,
4335 };
c970aa85
TM		 4336 struct rpc_task_setup task_setup_data = {
4337 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4338 .rpc_message = &msg,
c970aa85 4339 .callback_ops = &nfs4_lock_ops,
101070ca 4340 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4341 .flags = RPC_TASK_ASYNC,
4342 };
a5d16a4d
TM		 4343 int ret;
4344
3110ff80 4345 dprintk("%s: begin!\n", __func__);
cd3758e3 4346 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4347 fl->fl_u.nfs4_fl.owner,
4348 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4349 if (data == NULL)
4350 return -ENOMEM;
4351 if (IS_SETLKW(cmd))
4352 data->arg.block = 1;
b257957e
AB		 4353 if (recovery_type > NFS_LOCK_NEW) {
4354 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4355 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4356 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4357 }
1174dd1f
TM		 4358 msg.rpc_argp = &data->arg;
4359 msg.rpc_resp = &data->res;
c970aa85
TM		 4360 task_setup_data.callback_data = data;
4361 task = rpc_run_task(&task_setup_data);
7a1218a2 4362 if (IS_ERR(task))
a5d16a4d 4363 return PTR_ERR(task);
a5d16a4d
TM		 4364 ret = nfs4_wait_for_completion_rpc_task(task);
4365 if (ret == 0) {
4366 ret = data->rpc_status;
2bee72a6
TM		 4367 if (ret)
4368 nfs4_handle_setlk_error(data->server, data->lsp,
4369 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4370 } else
4371 data->cancelled = 1;
e6b3c4db 4372 rpc_put_task(task);
3110ff80 4373 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4374 return ret;
1da177e4
LT		 4375}
4376
4377static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4378{
202b50dc
TM		 4379 struct nfs_server *server = NFS_SERVER(state->inode);
4380 struct nfs4_exception exception = { };
4381 int err;
4382
4383 do {
42a2d13e
TM		 4384 /* Cache the lock if possible... */
4385 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4386 return 0;
afe6c27c 4387 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4388 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4389 break;
4390 nfs4_handle_exception(server, err, &exception);
4391 } while (exception.retry);
4392 return err;
1da177e4
LT		 4393}
4394
4395static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4396{
202b50dc
TM		 4397 struct nfs_server *server = NFS_SERVER(state->inode);
4398 struct nfs4_exception exception = { };
4399 int err;
4400
6bfc93ef
TM		 4401 err = nfs4_set_lock_state(state, request);
4402 if (err != 0)
4403 return err;
202b50dc 4404 do {
42a2d13e
TM		 4405 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4406 return 0;
afe6c27c 4407 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4408 switch (err) {
4409 default:
4410 goto out;
4411 case -NFS4ERR_GRACE:
4412 case -NFS4ERR_DELAY:
4413 nfs4_handle_exception(server, err, &exception);
4414 err = 0;
4415 }
202b50dc 4416 } while (exception.retry);
a9ed2e25 4417out:
202b50dc 4418 return err;
1da177e4
LT		 4419}
4420
4421static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4422{
19e03c57 4423 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4424 unsigned char fl_flags = request->fl_flags;
8e469ebd 4425 int status = -ENOLCK;
1da177e4 4426
8e469ebd
TM		 4427 if ((fl_flags & FL_POSIX) &&
4428 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4429 goto out;
6bfc93ef 4430 /* Is this a delegated open? */
6bfc93ef
TM		 4431 status = nfs4_set_lock_state(state, request);
4432 if (status != 0)
4433 goto out;
01c3b861
TM		 4434 request->fl_flags |= FL_ACCESS;
4435 status = do_vfs_lock(request->fl_file, request);
4436 if (status < 0)
4437 goto out;
19e03c57 4438 down_read(&nfsi->rwsem);
01c3b861 4439 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4440 /* Yes: cache locks! */
01c3b861 4441 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4442 request->fl_flags = fl_flags & ~FL_SLEEP;
4443 status = do_vfs_lock(request->fl_file, request);
4444 goto out_unlock;
01c3b861 4445 }
afe6c27c 4446 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4447 if (status != 0)
01c3b861 4448 goto out_unlock;
6bfc93ef 4449 /* Note: we always want to sleep here! */
01c3b861 4450 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4451 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4452 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4453out_unlock:
19e03c57 4454 up_read(&nfsi->rwsem);
01c3b861
TM		 4455out:
4456 request->fl_flags = fl_flags;
1da177e4
LT		 4457 return status;
4458}
4459
4460static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4461{
4462 struct nfs4_exception exception = { };
4463 int err;
4464
4465 do {
965b5d67
TM		 4466 err = _nfs4_proc_setlk(state, cmd, request);
4467 if (err == -NFS4ERR_DENIED)
4468 err = -EAGAIN;
1da177e4 4469 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4470 err, &exception);
1da177e4
LT		 4471 } while (exception.retry);
4472 return err;
4473}
4474
4475static int
4476nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4477{
4478 struct nfs_open_context *ctx;
4479 struct nfs4_state *state;
4480 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4481 int status;
4482
4483 /* verify open state */
cd3758e3 4484 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4485 state = ctx->state;
4486
4487 if (request->fl_start < 0 || request->fl_end < 0)
4488 return -EINVAL;
4489
d953126a
TM		 4490 if (IS_GETLK(cmd)) {
4491 if (state != NULL)
4492 return nfs4_proc_getlk(state, F_GETLK, request);
4493 return 0;
4494 }
1da177e4
LT		 4495
4496 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4497 return -EINVAL;
4498
d953126a
TM		 4499 if (request->fl_type == F_UNLCK) {
4500 if (state != NULL)
4501 return nfs4_proc_unlck(state, cmd, request);
4502 return 0;
4503 }
1da177e4 4504
d953126a
TM		 4505 if (state == NULL)
4506 return -ENOLCK;
1da177e4
LT		 4507 do {
4508 status = nfs4_proc_setlk(state, cmd, request);
4509 if ((status != -EAGAIN) || IS_SETLK(cmd))
4510 break;
4511 timeout = nfs4_set_lock_task_retry(timeout);
4512 status = -ERESTARTSYS;
4513 if (signalled())
4514 break;
4515 } while(status < 0);
1da177e4
LT		 4516 return status;
4517}
4518
888e694c
TM		 4519int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4520{
4521 struct nfs_server *server = NFS_SERVER(state->inode);
4522 struct nfs4_exception exception = { };
4523 int err;
4524
4525 err = nfs4_set_lock_state(state, fl);
4526 if (err != 0)
4527 goto out;
4528 do {
afe6c27c 4529 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4530 switch (err) {
4531 default:
4532 printk(KERN_ERR "%s: unhandled error %d.\n",
4533 __func__, err);
4534 case 0:
965b5d67 4535 case -ESTALE:
d5122201
TM		 4536 goto out;
4537 case -NFS4ERR_EXPIRED:
4538 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4539 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4540 nfs4_schedule_lease_recovery(server->nfs_client);
4541 goto out;
74e7bb73
RL		 4542 case -NFS4ERR_BADSESSION:
4543 case -NFS4ERR_BADSLOT:
4544 case -NFS4ERR_BAD_HIGH_SLOT:
4545 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4546 case -NFS4ERR_DEADSESSION:
0400a6b0 4547 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4548 goto out;
965b5d67
TM		 4549 case -ERESTARTSYS:
4550 /*
4551 * The show must go on: exit, but mark the
4552 * stateid as needing recovery.
4553 */
4554 case -NFS4ERR_ADMIN_REVOKED:
4555 case -NFS4ERR_BAD_STATEID:
4556 case -NFS4ERR_OPENMODE:
0400a6b0 4557 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4558 err = 0;
4559 goto out;
168667c4
TM		 4560 case -EKEYEXPIRED:
4561 /*
4562 * User RPCSEC_GSS context has expired.
4563 * We cannot recover this stateid now, so
4564 * skip it and allow recovery thread to
4565 * proceed.
4566 */
4567 err = 0;
4568 goto out;
965b5d67
TM		 4569 case -ENOMEM:
4570 case -NFS4ERR_DENIED:
4571 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4572 err = 0;
4573 goto out;
d5122201
TM		 4574 case -NFS4ERR_DELAY:
4575 break;
4576 }
888e694c
TM		 4577 err = nfs4_handle_exception(server, err, &exception);
4578 } while (exception.retry);
4579out:
4580 return err;
4581}
6b3b5496 4582
d3c7b7cc
TM		 4583static void nfs4_release_lockowner_release(void *calldata)
4584{
4585 kfree(calldata);
4586}
4587
4588const struct rpc_call_ops nfs4_release_lockowner_ops = {
4589 .rpc_release = nfs4_release_lockowner_release,
4590};
4591
4592void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4593{
4594 struct nfs_server *server = lsp->ls_state->owner->so_server;
4595 struct nfs_release_lockowner_args *args;
4596 struct rpc_message msg = {
4597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4598 };
4599
4600 if (server->nfs_client->cl_mvops->minor_version != 0)
4601 return;
4602 args = kmalloc(sizeof(*args), GFP_NOFS);
4603 if (!args)
4604 return;
4605 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4606 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4607 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4608 msg.rpc_argp = args;
4609 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4610}
4611
aa1870af
BF		 4612#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4613
64c2ce8b
AK		 4614static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4615 const void *buf, size_t buflen,
4616 int flags, int type)
6b3b5496 4617{
64c2ce8b
AK		 4618 if (strcmp(key, "") != 0)
4619 return -EINVAL;
4b580ee3 4620
64c2ce8b 4621 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4622}
4623
64c2ce8b
AK		 4624static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4625 void *buf, size_t buflen, int type)
6b3b5496 4626{
64c2ce8b
AK		 4627 if (strcmp(key, "") != 0)
4628 return -EINVAL;
aa1870af 4629
64c2ce8b 4630 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4631}
4632
64c2ce8b
AK		 4633static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4634 size_t list_len, const char *name,
4635 size_t name_len, int type)
6b3b5496 4636{
64c2ce8b 4637 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4638
096455a2
BF		 4639 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4640 return 0;
64c2ce8b
AK		 4641
4642 if (list && len <= list_len)
4643 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4644 return len;
6b3b5496
BF		 4645}
4646
69aaaae1
TM		 4647static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4648{
4649 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4650 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4651 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4652 return;
4653
4654 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4655 NFS_ATTR_FATTR_NLINK;
4656 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4657 fattr->nlink = 2;
4658}
4659
56659e99 4660int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4661 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4662{
4663 struct nfs_server *server = NFS_SERVER(dir);
4664 u32 bitmask[2] = {
361e624f
MN		 4665 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4666 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4667 };
4668 struct nfs4_fs_locations_arg args = {
4669 .dir_fh = NFS_FH(dir),
c228fd3a 4670 .name = name,
683b57b4
TM		 4671 .page = page,
4672 .bitmask = bitmask,
4673 };
22958463
BH		 4674 struct nfs4_fs_locations_res res = {
4675 .fs_locations = fs_locations,
4676 };
683b57b4
TM		 4677 struct rpc_message msg = {
4678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4679 .rpc_argp = &args,
22958463 4680 .rpc_resp = &res,
683b57b4
TM		 4681 };
4682 int status;
4683
3110ff80 4684 dprintk("%s: start\n", __func__);
c228fd3a 4685 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4686 fs_locations->server = server;
830b8e33 4687 fs_locations->nlocations = 0;
7c513058 4688 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
69aaaae1 4689 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4690 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4691 return status;
4692}
4693
5a5ea0d4
BS		 4694static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4695{
4696 int status;
4697 struct nfs4_secinfo_arg args = {
4698 .dir_fh = NFS_FH(dir),
4699 .name = name,
4700 };
4701 struct nfs4_secinfo_res res = {
4702 .flavors = flavors,
4703 };
4704 struct rpc_message msg = {
4705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4706 .rpc_argp = &args,
4707 .rpc_resp = &res,
4708 };
4709
4710 dprintk("NFS call secinfo %s\n", name->name);
4711 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4712 dprintk("NFS reply secinfo: %d\n", status);
4713 return status;
4714}
4715
4716int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4717{
4718 struct nfs4_exception exception = { };
4719 int err;
4720 do {
4721 err = nfs4_handle_exception(NFS_SERVER(dir),
4722 _nfs4_proc_secinfo(dir, name, flavors),
4723 &exception);
4724 } while (exception.retry);
4725 return err;
4726}
4727
557134a3 4728#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4729/*
4730 * Check the exchange flags returned by the server for invalid flags, having
4731 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4732 * DS flags set.
4733 */
4734static int nfs4_check_cl_exchange_flags(u32 flags)
4735{
4736 if (flags & ~EXCHGID4_FLAG_MASK_R)
4737 goto out_inval;
4738 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4739 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4740 goto out_inval;
4741 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4742 goto out_inval;
4743 return NFS_OK;
4744out_inval:
4745 return -NFS4ERR_INVAL;
4746}
4747
99fe60d0
BH		 4748/*
4749 * nfs4_proc_exchange_id()
4750 *
4751 * Since the clientid has expired, all compounds using sessions
4752 * associated with the stale clientid will be returning
4753 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4754 * be in some phase of session reset.
4755 */
4d643d1d 4756int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4757{
4758 nfs4_verifier verifier;
4759 struct nfs41_exchange_id_args args = {
4760 .client = clp,
357f54d6 4761 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4762 };
4763 struct nfs41_exchange_id_res res = {
4764 .client = clp,
4765 };
4766 int status;
4767 struct rpc_message msg = {
4768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4769 .rpc_argp = &args,
4770 .rpc_resp = &res,
4771 .rpc_cred = cred,
4772 };
4773 __be32 *p;
4774
4775 dprintk("--> %s\n", __func__);
4776 BUG_ON(clp == NULL);
a7b72103 4777
99fe60d0
BH		 4778 p = (u32 *)verifier.data;
4779 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4780 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4781 args.verifier = &verifier;
4782
c7a360b0
AA		 4783 args.id_len = scnprintf(args.id, sizeof(args.id),
4784 "%s/%s.%s/%u",
4785 clp->cl_ipaddr,
4786 init_utsname()->nodename,
4787 init_utsname()->domainname,
4788 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4789
c7a360b0
AA		 4790 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4791 if (!status)
4792 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4793 dprintk("<-- %s status= %d\n", __func__, status);
4794 return status;
4795}
4796
2050f0cc
AA		 4797struct nfs4_get_lease_time_data {
4798 struct nfs4_get_lease_time_args *args;
4799 struct nfs4_get_lease_time_res *res;
4800 struct nfs_client *clp;
4801};
4802
4803static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4804 void *calldata)
4805{
4806 int ret;
4807 struct nfs4_get_lease_time_data *data =
4808 (struct nfs4_get_lease_time_data *)calldata;
4809
4810 dprintk("--> %s\n", __func__);
689cf5c1 4811 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4812 /* just setup sequence, do not trigger session recovery
4813 since we're invoked within one */
4814 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4815 &data->args->la_seq_args,
4816 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4817
4818 BUG_ON(ret == -EAGAIN);
4819 rpc_call_start(task);
4820 dprintk("<-- %s\n", __func__);
4821}
4822
4823/*
4824 * Called from nfs4_state_manager thread for session setup, so don't recover
4825 * from sequence operation or clientid errors.
4826 */
4827static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4828{
4829 struct nfs4_get_lease_time_data *data =
4830 (struct nfs4_get_lease_time_data *)calldata;
4831
4832 dprintk("--> %s\n", __func__);
14516c3a
TM		 4833 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4834 return;
2050f0cc
AA		 4835 switch (task->tk_status) {
4836 case -NFS4ERR_DELAY:
4837 case -NFS4ERR_GRACE:
4838 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4839 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4840 task->tk_status = 0;
0110ee15 4841 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4842 return;
4843 }
2050f0cc
AA		 4844 dprintk("<-- %s\n", __func__);
4845}
4846
4847struct rpc_call_ops nfs4_get_lease_time_ops = {
4848 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4849 .rpc_call_done = nfs4_get_lease_time_done,
4850};
4851
4852int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4853{
4854 struct rpc_task *task;
4855 struct nfs4_get_lease_time_args args;
4856 struct nfs4_get_lease_time_res res = {
4857 .lr_fsinfo = fsinfo,
4858 };
4859 struct nfs4_get_lease_time_data data = {
4860 .args = &args,
4861 .res = &res,
4862 .clp = clp,
4863 };
4864 struct rpc_message msg = {
4865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4866 .rpc_argp = &args,
4867 .rpc_resp = &res,
4868 };
4869 struct rpc_task_setup task_setup = {
4870 .rpc_client = clp->cl_rpcclient,
4871 .rpc_message = &msg,
4872 .callback_ops = &nfs4_get_lease_time_ops,
4873 .callback_data = &data
4874 };
4875 int status;
4876
2050f0cc
AA		 4877 dprintk("--> %s\n", __func__);
4878 task = rpc_run_task(&task_setup);
4879
4880 if (IS_ERR(task))
4881 status = PTR_ERR(task);
4882 else {
4883 status = task->tk_status;
4884 rpc_put_task(task);
4885 }
4886 dprintk("<-- %s return %d\n", __func__, status);
4887
4888 return status;
4889}
4890
b73dafa7
RL		 4891/*
4892 * Reset a slot table
4893 */
104aeba4
AA		 4894static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4895 int ivalue)
ac72b7b3 4896{
104aeba4 4897 struct nfs4_slot *new = NULL;
b73dafa7 4898 int i;
ac72b7b3
AA		 4899 int ret = 0;
4900
104aeba4
AA		 4901 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4902 max_reqs, tbl->max_slots);
ac72b7b3 4903
104aeba4
AA		 4904 /* Does the newly negotiated max_reqs match the existing slot table? */
4905 if (max_reqs != tbl->max_slots) {
4906 ret = -ENOMEM;
4907 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4908 GFP_NOFS);
104aeba4
AA		 4909 if (!new)
4910 goto out;
4911 ret = 0;
4912 kfree(tbl->slots);
ac72b7b3
AA		 4913 }
4914 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4915 if (new) {
4916 tbl->slots = new;
4917 tbl->max_slots = max_reqs;
4918 }
4919 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4920 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4921 spin_unlock(&tbl->slot_tbl_lock);
4922 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4923 tbl, tbl->slots, tbl->max_slots);
4924out:
4925 dprintk("<-- %s: return %d\n", __func__, ret);
4926 return ret;
4927}
4928
b73dafa7
RL		 4929/*
4930 * Reset the forechannel and backchannel slot tables
4931 */
4932static int nfs4_reset_slot_tables(struct nfs4_session *session)
4933{
4934 int status;
4935
4936 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4937 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4938 if (status)
4939 return status;
4940
4941 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4942 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4943 return status;
4944}
4945
f8625a6a
RL		 4946/* Destroy the slot table */
4947static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4948{
4949 if (session->fc_slot_table.slots != NULL) {
4950 kfree(session->fc_slot_table.slots);
4951 session->fc_slot_table.slots = NULL;
4952 }
4953 if (session->bc_slot_table.slots != NULL) {
4954 kfree(session->bc_slot_table.slots);
4955 session->bc_slot_table.slots = NULL;
4956 }
4957 return;
4958}
4959
fc931582
AA		 4960/*
4961 * Initialize slot table
4962 */
050047ce
RL		 4963static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4964 int max_slots, int ivalue)
fc931582 4965{
fc931582
AA		 4966 struct nfs4_slot *slot;
4967 int ret = -ENOMEM;
4968
4969 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4970
050047ce 4971 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4972
8535b2be 4973 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4974 if (!slot)
4975 goto out;
fc931582
AA		 4976 ret = 0;
4977
4978 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4979 tbl->max_slots = max_slots;
4980 tbl->slots = slot;
4981 tbl->highest_used_slotid = -1; /* no slot is currently used */
4982 spin_unlock(&tbl->slot_tbl_lock);
4983 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4984 tbl, tbl->slots, tbl->max_slots);
4985out:
4986 dprintk("<-- %s: return %d\n", __func__, ret);
4987 return ret;
fc931582
AA		 4988}
4989
050047ce
RL		 4990/*
4991 * Initialize the forechannel and backchannel tables
4992 */
4993static int nfs4_init_slot_tables(struct nfs4_session *session)
4994{
f26468fb
TM		 4995 struct nfs4_slot_table *tbl;
4996 int status = 0;
050047ce 4997
f26468fb
TM		 4998 tbl = &session->fc_slot_table;
4999 if (tbl->slots == NULL) {
5000 status = nfs4_init_slot_table(tbl,
5001 session->fc_attrs.max_reqs, 1);
5002 if (status)
5003 return status;
5004 }
050047ce 5005
f26468fb
TM		 5006 tbl = &session->bc_slot_table;
5007 if (tbl->slots == NULL) {
5008 status = nfs4_init_slot_table(tbl,
5009 session->bc_attrs.max_reqs, 0);
5010 if (status)
5011 nfs4_destroy_slot_tables(session);
5012 }
f8625a6a
RL		 5013
5014 return status;
557134a3
AA		 5015}
5016
5017struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5018{
5019 struct nfs4_session *session;
5020 struct nfs4_slot_table *tbl;
5021
8535b2be 5022 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5023 if (!session)
5024 return NULL;
76db6d95 5025
557134a3 5026 tbl = &session->fc_slot_table;
9dfdf404 5027 tbl->highest_used_slotid = -1;
557134a3 5028 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5029 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5030 init_completion(&tbl->complete);
f8625a6a
RL		 5031
5032 tbl = &session->bc_slot_table;
9dfdf404 5033 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5034 spin_lock_init(&tbl->slot_tbl_lock);
5035 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5036 init_completion(&tbl->complete);
f8625a6a 5037
1055d76d
TM		 5038 session->session_state = 1<<NFS4_SESSION_INITING;
5039
557134a3
AA		 5040 session->clp = clp;
5041 return session;
5042}
5043
5044void nfs4_destroy_session(struct nfs4_session *session)
5045{
5a0ffe54
AA		 5046 nfs4_proc_destroy_session(session);
5047 dprintk("%s Destroy backchannel for xprt %p\n",
5048 __func__, session->clp->cl_rpcclient->cl_xprt);
5049 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5050 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5051 nfs4_destroy_slot_tables(session);
557134a3
AA		 5052 kfree(session);
5053}
5054
fc931582
AA		 5055/*
5056 * Initialize the values to be used by the client in CREATE_SESSION
5057 * If nfs4_init_session set the fore channel request and response sizes,
5058 * use them.
5059 *
5060 * Set the back channel max_resp_sz_cached to zero to force the client to
5061 * always set csa_cachethis to FALSE because the current implementation
5062 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5063 */
5064static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5065{
5066 struct nfs4_session *session = args->client->cl_session;
5067 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5068 mxresp_sz = session->fc_attrs.max_resp_sz;
5069
5070 if (mxrqst_sz == 0)
5071 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5072 if (mxresp_sz == 0)
5073 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5074 /* Fore channel attributes */
5075 args->fc_attrs.headerpadsz = 0;
5076 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5077 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5078 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5079 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5080
5081 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5082 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5083 __func__,
5084 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5085 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5086
5087 /* Back channel attributes */
5088 args->bc_attrs.headerpadsz = 0;
5089 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5090 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5091 args->bc_attrs.max_resp_sz_cached = 0;
5092 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5093 args->bc_attrs.max_reqs = 1;
5094
5095 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5096 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5097 __func__,
5098 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5099 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5100 args->bc_attrs.max_reqs);
5101}
5102
43c2e885 5103static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5104{
43c2e885
BF		 5105 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5106 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5107
5108 if (rcvd->headerpadsz > sent->headerpadsz)
5109 return -EINVAL;
5110 if (rcvd->max_resp_sz > sent->max_resp_sz)
5111 return -EINVAL;
5112 /*
5113 * Our requested max_ops is the minimum we need; we're not
5114 * prepared to break up compounds into smaller pieces than that.
5115 * So, no point even trying to continue if the server won't
5116 * cooperate:
5117 */
5118 if (rcvd->max_ops < sent->max_ops)
5119 return -EINVAL;
5120 if (rcvd->max_reqs == 0)
5121 return -EINVAL;
5122 return 0;
8d35301d
AA		 5123}
5124
43c2e885
BF		 5125static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5126{
5127 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5128 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5129
43c2e885
BF		 5130 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5131 return -EINVAL;
5132 if (rcvd->max_resp_sz < sent->max_resp_sz)
5133 return -EINVAL;
5134 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5135 return -EINVAL;
5136 /* These would render the backchannel useless: */
5137 if (rcvd->max_ops == 0)
5138 return -EINVAL;
5139 if (rcvd->max_reqs == 0)
5140 return -EINVAL;
5141 return 0;
5142}
8d35301d 5143
8d35301d
AA		 5144static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5145 struct nfs4_session *session)
5146{
43c2e885 5147 int ret;
8d35301d 5148
43c2e885
BF		 5149 ret = nfs4_verify_fore_channel_attrs(args, session);
5150 if (ret)
5151 return ret;
5152 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5153}
5154
fc931582
AA		 5155static int _nfs4_proc_create_session(struct nfs_client *clp)
5156{
5157 struct nfs4_session *session = clp->cl_session;
5158 struct nfs41_create_session_args args = {
5159 .client = clp,
5160 .cb_program = NFS4_CALLBACK,
5161 };
5162 struct nfs41_create_session_res res = {
5163 .client = clp,
5164 };
5165 struct rpc_message msg = {
5166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5167 .rpc_argp = &args,
5168 .rpc_resp = &res,
5169 };
5170 int status;
5171
5172 nfs4_init_channel_attrs(&args);
0f91421e 5173 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5174
5175 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5176
8d35301d
AA		 5177 if (!status)
5178 /* Verify the session's negotiated channel_attrs values */
5179 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5180 if (!status) {
5181 /* Increment the clientid slot sequence id */
5182 clp->cl_seqid++;
5183 }
5184
5185 return status;
5186}
5187
5188/*
5189 * Issues a CREATE_SESSION operation to the server.
5190 * It is the responsibility of the caller to verify the session is
5191 * expired before calling this routine.
5192 */
f26468fb 5193int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5194{
5195 int status;
5196 unsigned *ptr;
fc931582 5197 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5198 long timeout = 0;
5199 int err;
fc931582
AA		 5200
5201 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5202
7d6d63d6
RL		 5203 do {
5204 status = _nfs4_proc_create_session(clp);
5205 if (status == -NFS4ERR_DELAY) {
5206 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5207 if (err)
5208 status = err;
5209 }
5210 } while (status == -NFS4ERR_DELAY);
5211
fc931582
AA		 5212 if (status)
5213 goto out;
5214
f26468fb
TM		 5215 /* Init and reset the fore channel */
5216 status = nfs4_init_slot_tables(session);
5217 dprintk("slot table initialization returned %d\n", status);
5218 if (status)
5219 goto out;
5220 status = nfs4_reset_slot_tables(session);
5221 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5222 if (status)
5223 goto out;
5224
5225 ptr = (unsigned *)&session->sess_id.data[0];
5226 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5227 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5228out:
5229 dprintk("<-- %s\n", __func__);
5230 return status;
5231}
5232
0f3e66c6
AA		 5233/*
5234 * Issue the over-the-wire RPC DESTROY_SESSION.
5235 * The caller must serialize access to this routine.
5236 */
5237int nfs4_proc_destroy_session(struct nfs4_session *session)
5238{
5239 int status = 0;
5240 struct rpc_message msg;
5241
5242 dprintk("--> nfs4_proc_destroy_session\n");
5243
5244 /* session is still being setup */
5245 if (session->clp->cl_cons_state != NFS_CS_READY)
5246 return status;
5247
5248 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5249 msg.rpc_argp = session;
5250 msg.rpc_resp = NULL;
5251 msg.rpc_cred = NULL;
5252 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5253
5254 if (status)
5255 printk(KERN_WARNING
5256 "Got error %d from the server on DESTROY_SESSION. "
5257 "Session has been destroyed regardless...\n", status);
5258
5259 dprintk("<-- nfs4_proc_destroy_session\n");
5260 return status;
5261}
5262
fccba804
TM		 5263int nfs4_init_session(struct nfs_server *server)
5264{
5265 struct nfs_client *clp = server->nfs_client;
2449ea2e 5266 struct nfs4_session *session;
68bf05ef 5267 unsigned int rsize, wsize;
fccba804
TM		 5268 int ret;
5269
5270 if (!nfs4_has_session(clp))
5271 return 0;
5272
1055d76d
TM		 5273 session = clp->cl_session;
5274 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5275 return 0;
5276
68bf05ef
AA		 5277 rsize = server->rsize;
5278 if (rsize == 0)
5279 rsize = NFS_MAX_FILE_IO_SIZE;
5280 wsize = server->wsize;
5281 if (wsize == 0)
5282 wsize = NFS_MAX_FILE_IO_SIZE;
5283
68bf05ef
AA		 5284 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5285 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5286
fccba804
TM		 5287 ret = nfs4_recover_expired_lease(server);
5288 if (!ret)
5289 ret = nfs4_check_client_ready(clp);
5290 return ret;
5291}
5292
d83217c1
AA		 5293int nfs4_init_ds_session(struct nfs_client *clp)
5294{
5295 struct nfs4_session *session = clp->cl_session;
5296 int ret;
5297
5298 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5299 return 0;
5300
5301 ret = nfs4_client_recover_expired_lease(clp);
5302 if (!ret)
5303 /* Test for the DS role */
5304 if (!is_ds_client(clp))
5305 ret = -ENODEV;
5306 if (!ret)
5307 ret = nfs4_check_client_ready(clp);
5308 return ret;
5309
5310}
5311EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5312
5313
fc01cea9
AA		 5314/*
5315 * Renew the cl_session lease.
5316 */
d5f8d3fe
TM		 5317struct nfs4_sequence_data {
5318 struct nfs_client *clp;
5319 struct nfs4_sequence_args args;
5320 struct nfs4_sequence_res res;
5321};
5322
dc96aef9
AB		 5323static void nfs41_sequence_release(void *data)
5324{
d5f8d3fe
TM		 5325 struct nfs4_sequence_data *calldata = data;
5326 struct nfs_client *clp = calldata->clp;
dc96aef9 5327
7135840f
AB		 5328 if (atomic_read(&clp->cl_count) > 1)
5329 nfs4_schedule_state_renewal(clp);
5330 nfs_put_client(clp);
d5f8d3fe 5331 kfree(calldata);
dc96aef9
AB		 5332}
5333
aa5190d0
TM		 5334static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5335{
5336 switch(task->tk_status) {
5337 case -NFS4ERR_DELAY:
aa5190d0
TM		 5338 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5339 return -EAGAIN;
5340 default:
0400a6b0 5341 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5342 }
5343 return 0;
5344}
5345
dc96aef9 5346static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5347{
d5f8d3fe
TM		 5348 struct nfs4_sequence_data *calldata = data;
5349 struct nfs_client *clp = calldata->clp;
fc01cea9 5350
14516c3a
TM		 5351 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5352 return;
fc01cea9
AA		 5353
5354 if (task->tk_status < 0) {
5355 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5356 if (atomic_read(&clp->cl_count) == 1)
5357 goto out;
fc01cea9 5358
aa5190d0
TM		 5359 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5360 rpc_restart_call_prepare(task);
fc01cea9
AA		 5361 return;
5362 }
5363 }
fc01cea9 5364 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5365out:
fc01cea9
AA		 5366 dprintk("<-- %s\n", __func__);
5367}
5368
5369static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5370{
d5f8d3fe
TM		 5371 struct nfs4_sequence_data *calldata = data;
5372 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5373 struct nfs4_sequence_args *args;
5374 struct nfs4_sequence_res *res;
5375
fc01cea9
AA		 5376 args = task->tk_msg.rpc_argp;
5377 res = task->tk_msg.rpc_resp;
5378
035168ab 5379 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5380 return;
5381 rpc_call_start(task);
5382}
5383
5384static const struct rpc_call_ops nfs41_sequence_ops = {
5385 .rpc_call_done = nfs41_sequence_call_done,
5386 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5387 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5388};
5389
71ac6da9 5390static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5391{
d5f8d3fe 5392 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5393 struct rpc_message msg = {
5394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5395 .rpc_cred = cred,
5396 };
71ac6da9
TM		 5397 struct rpc_task_setup task_setup_data = {
5398 .rpc_client = clp->cl_rpcclient,
5399 .rpc_message = &msg,
5400 .callback_ops = &nfs41_sequence_ops,
5401 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5402 };
fc01cea9 5403
7135840f 5404 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5405 return ERR_PTR(-EIO);
dfb4f309 5406 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5407 if (calldata == NULL) {
7135840f 5408 nfs_put_client(clp);
71ac6da9 5409 return ERR_PTR(-ENOMEM);
fc01cea9 5410 }
d5f8d3fe
TM		 5411 msg.rpc_argp = &calldata->args;
5412 msg.rpc_resp = &calldata->res;
5413 calldata->clp = clp;
71ac6da9 5414 task_setup_data.callback_data = calldata;
fc01cea9 5415
71ac6da9
TM		 5416 return rpc_run_task(&task_setup_data);
5417}
5418
5419static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5420{
5421 struct rpc_task *task;
5422 int ret = 0;
5423
5424 task = _nfs41_proc_sequence(clp, cred);
5425 if (IS_ERR(task))
5426 ret = PTR_ERR(task);
5427 else
bf294b41 5428 rpc_put_task_async(task);
71ac6da9
TM		 5429 dprintk("<-- %s status=%d\n", __func__, ret);
5430 return ret;
5431}
5432
5433static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5434{
5435 struct rpc_task *task;
5436 int ret;
5437
5438 task = _nfs41_proc_sequence(clp, cred);
5439 if (IS_ERR(task)) {
5440 ret = PTR_ERR(task);
5441 goto out;
5442 }
5443 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5444 if (!ret) {
5445 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5446
5447 if (task->tk_status == 0)
5448 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5449 ret = task->tk_status;
b4410c2f 5450 }
71ac6da9
TM		 5451 rpc_put_task(task);
5452out:
5453 dprintk("<-- %s status=%d\n", __func__, ret);
5454 return ret;
fc01cea9
AA		 5455}
5456
fce5c838
RL		 5457struct nfs4_reclaim_complete_data {
5458 struct nfs_client *clp;
5459 struct nfs41_reclaim_complete_args arg;
5460 struct nfs41_reclaim_complete_res res;
5461};
5462
5463static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5464{
5465 struct nfs4_reclaim_complete_data *calldata = data;
5466
b257957e 5467 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5468 if (nfs41_setup_sequence(calldata->clp->cl_session,
5469 &calldata->arg.seq_args,
fce5c838
RL		 5470 &calldata->res.seq_res, 0, task))
5471 return;
5472
5473 rpc_call_start(task);
5474}
5475
aa5190d0
TM		 5476static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5477{
5478 switch(task->tk_status) {
5479 case 0:
5480 case -NFS4ERR_COMPLETE_ALREADY:
5481 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5482 break;
5483 case -NFS4ERR_DELAY:
aa5190d0
TM		 5484 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5485 return -EAGAIN;
5486 default:
0400a6b0 5487 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5488 }
5489 return 0;
5490}
5491
fce5c838
RL		 5492static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5493{
5494 struct nfs4_reclaim_complete_data *calldata = data;
5495 struct nfs_client *clp = calldata->clp;
5496 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5497
5498 dprintk("--> %s\n", __func__);
14516c3a
TM		 5499 if (!nfs41_sequence_done(task, res))
5500 return;
fce5c838 5501
aa5190d0
TM		 5502 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5503 rpc_restart_call_prepare(task);
5504 return;
5505 }
fce5c838
RL		 5506 dprintk("<-- %s\n", __func__);
5507}
5508
5509static void nfs4_free_reclaim_complete_data(void *data)
5510{
5511 struct nfs4_reclaim_complete_data *calldata = data;
5512
5513 kfree(calldata);
5514}
5515
5516static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5517 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5518 .rpc_call_done = nfs4_reclaim_complete_done,
5519 .rpc_release = nfs4_free_reclaim_complete_data,
5520};
5521
5522/*
5523 * Issue a global reclaim complete.
5524 */
5525static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5526{
5527 struct nfs4_reclaim_complete_data *calldata;
5528 struct rpc_task *task;
5529 struct rpc_message msg = {
5530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5531 };
5532 struct rpc_task_setup task_setup_data = {
5533 .rpc_client = clp->cl_rpcclient,
5534 .rpc_message = &msg,
5535 .callback_ops = &nfs4_reclaim_complete_call_ops,
5536 .flags = RPC_TASK_ASYNC,
5537 };
5538 int status = -ENOMEM;
5539
5540 dprintk("--> %s\n", __func__);
8535b2be 5541 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5542 if (calldata == NULL)
5543 goto out;
5544 calldata->clp = clp;
5545 calldata->arg.one_fs = 0;
fce5c838
RL		 5546
5547 msg.rpc_argp = &calldata->arg;
5548 msg.rpc_resp = &calldata->res;
5549 task_setup_data.callback_data = calldata;
5550 task = rpc_run_task(&task_setup_data);
acf82b85 5551 if (IS_ERR(task)) {
fce5c838 5552 status = PTR_ERR(task);
acf82b85
DC		 5553 goto out;
5554 }
c34c32ea
AA		 5555 status = nfs4_wait_for_completion_rpc_task(task);
5556 if (status == 0)
5557 status = task->tk_status;
fce5c838 5558 rpc_put_task(task);
acf82b85 5559 return 0;
fce5c838
RL		 5560out:
5561 dprintk("<-- %s status=%d\n", __func__, status);
5562 return status;
5563}
b1f69b75
AA		 5564
5565static void
5566nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5567{
5568 struct nfs4_layoutget *lgp = calldata;
c31663d4 5569 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5570
5571 dprintk("--> %s\n", __func__);
c31663d4
FI		 5572 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5573 * right now covering the LAYOUTGET we are about to send.
5574 * However, that is not so catastrophic, and there seems
5575 * to be no way to prevent it completely.
5576 */
b1f69b75
AA		 5577 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5578 &lgp->res.seq_res, 0, task))
5579 return;
cf7d63f1
FI		 5580 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5581 NFS_I(lgp->args.inode)->layout,
5582 lgp->args.ctx->state)) {
5583 rpc_exit(task, NFS4_OK);
5584 return;
5585 }
b1f69b75
AA		 5586 rpc_call_start(task);
5587}
5588
5589static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5590{
5591 struct nfs4_layoutget *lgp = calldata;
5592 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5593
5594 dprintk("--> %s\n", __func__);
5595
5596 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5597 return;
5598
5599 switch (task->tk_status) {
5600 case 0:
5601 break;
5602 case -NFS4ERR_LAYOUTTRYLATER:
5603 case -NFS4ERR_RECALLCONFLICT:
5604 task->tk_status = -NFS4ERR_DELAY;
5605 /* Fall through */
5606 default:
5607 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5608 rpc_restart_call_prepare(task);
5609 return;
5610 }
5611 }
b1f69b75
AA		 5612 dprintk("<-- %s\n", __func__);
5613}
5614
5615static void nfs4_layoutget_release(void *calldata)
5616{
5617 struct nfs4_layoutget *lgp = calldata;
5618
5619 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5620 put_nfs_open_context(lgp->args.ctx);
5621 kfree(calldata);
5622 dprintk("<-- %s\n", __func__);
5623}
5624
5625static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5626 .rpc_call_prepare = nfs4_layoutget_prepare,
5627 .rpc_call_done = nfs4_layoutget_done,
5628 .rpc_release = nfs4_layoutget_release,
5629};
5630
5631int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5632{
5633 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5634 struct rpc_task *task;
5635 struct rpc_message msg = {
5636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5637 .rpc_argp = &lgp->args,
5638 .rpc_resp = &lgp->res,
5639 };
5640 struct rpc_task_setup task_setup_data = {
5641 .rpc_client = server->client,
5642 .rpc_message = &msg,
5643 .callback_ops = &nfs4_layoutget_call_ops,
5644 .callback_data = lgp,
5645 .flags = RPC_TASK_ASYNC,
5646 };
5647 int status = 0;
5648
5649 dprintk("--> %s\n", __func__);
5650
35124a09 5651 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5652 lgp->res.seq_res.sr_slot = NULL;
5653 task = rpc_run_task(&task_setup_data);
5654 if (IS_ERR(task))
5655 return PTR_ERR(task);
5656 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5657 if (status == 0)
5658 status = task->tk_status;
5659 if (status == 0)
5660 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5661 rpc_put_task(task);
5662 dprintk("<-- %s status=%d\n", __func__, status);
5663 return status;
5664}
5665
5666static int
5667_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5668{
5669 struct nfs4_getdeviceinfo_args args = {
5670 .pdev = pdev,
5671 };
5672 struct nfs4_getdeviceinfo_res res = {
5673 .pdev = pdev,
5674 };
5675 struct rpc_message msg = {
5676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5677 .rpc_argp = &args,
5678 .rpc_resp = &res,
5679 };
5680 int status;
5681
5682 dprintk("--> %s\n", __func__);
7c513058 5683 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5684 dprintk("<-- %s status=%d\n", __func__, status);
5685
5686 return status;
5687}
5688
5689int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5690{
5691 struct nfs4_exception exception = { };
5692 int err;
5693
5694 do {
5695 err = nfs4_handle_exception(server,
5696 _nfs4_proc_getdeviceinfo(server, pdev),
5697 &exception);
5698 } while (exception.retry);
5699 return err;
5700}
5701EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5702
863a3c6c
AA		 5703static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5704{
5705 struct nfs4_layoutcommit_data *data = calldata;
5706 struct nfs_server *server = NFS_SERVER(data->args.inode);
5707
5708 if (nfs4_setup_sequence(server, &data->args.seq_args,
5709 &data->res.seq_res, 1, task))
5710 return;
5711 rpc_call_start(task);
5712}
5713
5714static void
5715nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5716{
5717 struct nfs4_layoutcommit_data *data = calldata;
5718 struct nfs_server *server = NFS_SERVER(data->args.inode);
5719
5720 if (!nfs4_sequence_done(task, &data->res.seq_res))
5721 return;
5722
5723 switch (task->tk_status) { /* Just ignore these failures */
5724 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5725 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5726 case NFS4ERR_BADLAYOUT: /* no layout */
5727 case NFS4ERR_GRACE: /* loca_recalim always false */
5728 task->tk_status = 0;
5729 }
5730
5731 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5732 nfs_restart_rpc(task, server->nfs_client);
5733 return;
5734 }
5735
5736 if (task->tk_status == 0)
5737 nfs_post_op_update_inode_force_wcc(data->args.inode,
5738 data->res.fattr);
5739}
5740
5741static void nfs4_layoutcommit_release(void *calldata)
5742{
5743 struct nfs4_layoutcommit_data *data = calldata;
5744
5745 /* Matched by references in pnfs_set_layoutcommit */
5746 put_lseg(data->lseg);
5747 put_rpccred(data->cred);
5748 kfree(data);
5749}
5750
5751static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5752 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5753 .rpc_call_done = nfs4_layoutcommit_done,
5754 .rpc_release = nfs4_layoutcommit_release,
5755};
5756
5757int
ef311537 5758nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5759{
5760 struct rpc_message msg = {
5761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5762 .rpc_argp = &data->args,
5763 .rpc_resp = &data->res,
5764 .rpc_cred = data->cred,
5765 };
5766 struct rpc_task_setup task_setup_data = {
5767 .task = &data->task,
5768 .rpc_client = NFS_CLIENT(data->args.inode),
5769 .rpc_message = &msg,
5770 .callback_ops = &nfs4_layoutcommit_ops,
5771 .callback_data = data,
5772 .flags = RPC_TASK_ASYNC,
5773 };
5774 struct rpc_task *task;
5775 int status = 0;
5776
5777 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5778 "lbw: %llu inode %lu\n",
5779 data->task.tk_pid, sync,
5780 data->args.lastbytewritten,
5781 data->args.inode->i_ino);
5782
5783 task = rpc_run_task(&task_setup_data);
5784 if (IS_ERR(task))
5785 return PTR_ERR(task);
ef311537 5786 if (sync == false)
863a3c6c
AA		 5787 goto out;
5788 status = nfs4_wait_for_completion_rpc_task(task);
5789 if (status != 0)
5790 goto out;
5791 status = task->tk_status;
5792out:
5793 dprintk("%s: status %d\n", __func__, status);
5794 rpc_put_task(task);
5795 return status;
5796}
557134a3
AA		 5797#endif /* CONFIG_NFS_V4_1 */
5798
591d71cb 5799struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5800 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5801 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5802 .recover_open = nfs4_open_reclaim,
5803 .recover_lock = nfs4_lock_reclaim,
591d71cb 5804 .establish_clid = nfs4_init_clientid,
90a16617 5805 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5806};
5807
591d71cb
AA		 5808#if defined(CONFIG_NFS_V4_1)
5809struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5810 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5811 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5812 .recover_open = nfs4_open_reclaim,
5813 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5814 .establish_clid = nfs41_init_clientid,
b4b82607 5815 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5816 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5817};
5818#endif /* CONFIG_NFS_V4_1 */
5819
5820struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5821 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5822 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5823 .recover_open = nfs4_open_expired,
5824 .recover_lock = nfs4_lock_expired,
5825 .establish_clid = nfs4_init_clientid,
90a16617 5826 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5827};
5828
5829#if defined(CONFIG_NFS_V4_1)
5830struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5831 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5832 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5833 .recover_open = nfs4_open_expired,
5834 .recover_lock = nfs4_lock_expired,
4d643d1d 5835 .establish_clid = nfs41_init_clientid,
b4b82607 5836 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5837};
591d71cb 5838#endif /* CONFIG_NFS_V4_1 */
1da177e4 5839
29fba38b
BH		 5840struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5841 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5842 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5843 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5844};
5845
5846#if defined(CONFIG_NFS_V4_1)
5847struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5848 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5849 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5850 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5851};
5852#endif
5853
97dc1359
TM		 5854static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5855 .minor_version = 0,
5856 .call_sync = _nfs4_call_sync,
e047a10c 5857 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5858 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5859 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5860 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5861};
5862
5863#if defined(CONFIG_NFS_V4_1)
5864static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5865 .minor_version = 1,
5866 .call_sync = _nfs4_call_sync_session,
e047a10c 5867 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5868 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5869 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5870 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5871};
5872#endif
5873
97dc1359
TM		 5874const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5875 [0] = &nfs_v4_0_minor_ops,
5876#if defined(CONFIG_NFS_V4_1)
5877 [1] = &nfs_v4_1_minor_ops,
5878#endif
5879};
5880
92e1d5be 5881static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5882 .permission = nfs_permission,
5883 .getattr = nfs_getattr,
5884 .setattr = nfs_setattr,
64c2ce8b
AK		 5885 .getxattr = generic_getxattr,
5886 .setxattr = generic_setxattr,
5887 .listxattr = generic_listxattr,
5888 .removexattr = generic_removexattr,
6b3b5496
BF		 5889};
5890
509de811 5891const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5892 .version = 4, /* protocol version */
5893 .dentry_ops = &nfs4_dentry_operations,
5894 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5895 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5896 .getroot = nfs4_proc_get_root,
5897 .getattr = nfs4_proc_getattr,
5898 .setattr = nfs4_proc_setattr,
2b3de441 5899 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5900 .lookup = nfs4_proc_lookup,
5901 .access = nfs4_proc_access,
5902 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5903 .create = nfs4_proc_create,
5904 .remove = nfs4_proc_remove,
5905 .unlink_setup = nfs4_proc_unlink_setup,
5906 .unlink_done = nfs4_proc_unlink_done,
5907 .rename = nfs4_proc_rename,
d3d4152a
JL		 5908 .rename_setup = nfs4_proc_rename_setup,
5909 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5910 .link = nfs4_proc_link,
5911 .symlink = nfs4_proc_symlink,
5912 .mkdir = nfs4_proc_mkdir,
5913 .rmdir = nfs4_proc_remove,
5914 .readdir = nfs4_proc_readdir,
5915 .mknod = nfs4_proc_mknod,
5916 .statfs = nfs4_proc_statfs,
5917 .fsinfo = nfs4_proc_fsinfo,
5918 .pathconf = nfs4_proc_pathconf,
e9326dca 5919 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5920 .decode_dirent = nfs4_decode_dirent,
5921 .read_setup = nfs4_proc_read_setup,
ec06c096 5922 .read_done = nfs4_read_done,
1da177e4 5923 .write_setup = nfs4_proc_write_setup,
788e7a89 5924 .write_done = nfs4_write_done,
1da177e4 5925 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5926 .commit_done = nfs4_commit_done,
1da177e4 5927 .lock = nfs4_proc_lock,
e50a1c2e 5928 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5929 .close_context = nfs4_close_context,
2b484297 5930 .open_context = nfs4_atomic_open,
45a52a02 5931 .init_client = nfs4_init_client,
5a5ea0d4 5932 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 5933};
5934
64c2ce8b
AK		 5935static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5936 .prefix = XATTR_NAME_NFSV4_ACL,
5937 .list = nfs4_xattr_list_nfs4_acl,
5938 .get = nfs4_xattr_get_nfs4_acl,
5939 .set = nfs4_xattr_set_nfs4_acl,
5940};
5941
5942const struct xattr_handler *nfs4_xattr_handlers[] = {
5943 &nfs4_xattr_nfs4_acl_handler,
5944 NULL
5945};
5946
1da177e4
LT		 5947/*
5948 * Local variables:
5949 * c-basic-offset: 8
5950 * End:
5951 */
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