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NFSv41: Clean up slot table management
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
1da177e4 47#include <linux/namei.h>
02a913a7 48#include <linux/mount.h>
99fe60d0 49#include <linux/module.h>
5a0ffe54 50#include <linux/sunrpc/bc_xprt.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
fc931582 56#include "callback.h"
1da177e4
LT		 57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
2066fe89 60#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
a78cb57a
TM		 63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 67static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 68static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 71
1da177e4 72/* Prevent leaks of NFSv4 errors into userland */
46f72f57 73static int nfs4_map_errors(int err)
1da177e4 74{
52567b03
TM		 75 if (err >= -1000)
76 return err;
77 switch (err) {
78 case -NFS4ERR_RESOURCE:
79 return -EREMOTEIO;
80 default:
1da177e4 81 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 82 __func__, -err);
52567b03 83 break;
1da177e4 84 }
52567b03 85 return -EIO;
1da177e4
LT		 86}
87
88/*
89 * This is our standard bitmap for GETATTR requests.
90 */
91const u32 nfs4_fattr_bitmap[2] = {
92 FATTR4_WORD0_TYPE
93 | FATTR4_WORD0_CHANGE
94 | FATTR4_WORD0_SIZE
95 | FATTR4_WORD0_FSID
96 | FATTR4_WORD0_FILEID,
97 FATTR4_WORD1_MODE
98 | FATTR4_WORD1_NUMLINKS
99 | FATTR4_WORD1_OWNER
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
106};
107
108const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
115};
116
4ce79717 117const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 118 FATTR4_WORD0_MAXLINK
119 | FATTR4_WORD0_MAXNAME,
120 0
121};
122
123const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
127 0
128};
129
830b8e33
MN		 130const u32 nfs4_fs_locations_bitmap[2] = {
131 FATTR4_WORD0_TYPE
132 | FATTR4_WORD0_CHANGE
133 | FATTR4_WORD0_SIZE
134 | FATTR4_WORD0_FSID
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
137 FATTR4_WORD1_MODE
138 | FATTR4_WORD1_NUMLINKS
139 | FATTR4_WORD1_OWNER
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
147};
148
bc4785cd 149static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 150 struct nfs4_readdir_arg *readdir)
151{
0dbb4c67 152 __be32 *start, *p;
1da177e4
LT		 153
154 BUG_ON(readdir->count < 80);
155 if (cookie > 2) {
b7ef1956 156 readdir->cookie = cookie;
1da177e4
LT		 157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
158 return;
159 }
160
161 readdir->cookie = 0;
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
163 if (cookie == 2)
164 return;
165
166 /*
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
171 * instead of 1 or 2.
172 */
0dbb4c67 173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 174
175 if (cookie == 0) {
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
181 p++;
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
4e769b93 185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 186 }
187
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
193 p++;
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
4e769b93 197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 198
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
202}
203
65de872e
TM		 204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
e005e804 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 211 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
9e33bed5 238 struct nfs4_state *state = exception->state;
65de872e
TM		 239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
9e33bed5
TM		 245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
4745e315 258#if !defined(CONFIG_NFS_V4_1)
65de872e 259 break;
4745e315
AA		 260#else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
262 break;
263 /* FALLTHROUGH */
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
0b9e2d41 273 nfs4_schedule_state_recovery(clp);
4745e315 274 exception->retry = 1;
b9179237 275 break;
4745e315 276#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e 277 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
65de872e
TM		 285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
287 ret = nfs4_delay(server->client, &exception->timeout);
288 if (ret != 0)
289 break;
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
292 }
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
295}
296
297
26e976a8 298static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 299{
7539bbab 300 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
305}
306
cccef3b9
AA		 307#if defined(CONFIG_NFS_V4_1)
308
e2c4ab3c
AA		 309/*
310 * nfs4_free_slot - free a slot and efficiently update slot table.
311 *
312 * freeing a slot is trivially done by clearing its respective bit
313 * in the bitmap.
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
321 */
322static void
323nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
324{
325 int slotid = free_slotid;
326
327 spin_lock(&tbl->slot_tbl_lock);
328 /* clear used bit in bitmap */
329 __clear_bit(slotid, tbl->used_slots);
330
331 /* update highest_used_slotid when it is freed */
332 if (slotid == tbl->highest_used_slotid) {
333 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
334 if (slotid >= 0 && slotid < tbl->max_slots)
335 tbl->highest_used_slotid = slotid;
336 else
337 tbl->highest_used_slotid = -1;
338 }
e2c4ab3c
AA		 339 spin_unlock(&tbl->slot_tbl_lock);
340 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
341 free_slotid, tbl->highest_used_slotid);
342}
343
d61e612a 344static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 345 struct nfs4_sequence_res *res)
346{
347 struct nfs4_slot_table *tbl;
348
13615871
AA		 349 tbl = &clp->cl_session->fc_slot_table;
350 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 351 /* just wake up the next guy waiting since
352 * we may have not consumed a slot after all */
691daf3b
AA		 353 dprintk("%s: No slot\n", __func__);
354 } else {
355 nfs4_free_slot(tbl, res->sr_slotid);
356 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871 357 }
ea028ac9
AA		 358
359 /* Signal state manager thread if session is drained */
360 if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
361 spin_lock(&tbl->slot_tbl_lock);
362 if (tbl->highest_used_slotid == -1) {
363 dprintk("%s COMPLETE: Session Drained\n", __func__);
364 complete(&clp->cl_session->complete);
365 }
366 spin_unlock(&tbl->slot_tbl_lock);
691daf3b
AA		 367 } else {
368 rpc_wake_up_next(&tbl->slot_tbl_waitq);
ea028ac9 369 }
13615871
AA		 370}
371
b0df806c
AA		 372static void nfs41_sequence_done(struct nfs_client *clp,
373 struct nfs4_sequence_res *res,
374 int rpc_status)
375{
376 unsigned long timestamp;
377 struct nfs4_slot_table *tbl;
378 struct nfs4_slot *slot;
379
380 /*
381 * sr_status remains 1 if an RPC level error occurred. The server
382 * may or may not have processed the sequence operation..
383 * Proceed as if the server received and processed the sequence
384 * operation.
385 */
386 if (res->sr_status == 1)
387 res->sr_status = NFS_OK;
388
389 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
390 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
391 goto out;
392
691daf3b 393 /* Check the SEQUENCE operation status */
b0df806c 394 if (res->sr_status == 0) {
691daf3b
AA		 395 tbl = &clp->cl_session->fc_slot_table;
396 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 397 /* Update the slot's sequence and clientid lease timer */
398 ++slot->seq_nr;
399 timestamp = res->sr_renewal_time;
400 spin_lock(&clp->cl_lock);
401 if (time_before(clp->cl_last_renewal, timestamp))
402 clp->cl_last_renewal = timestamp;
403 spin_unlock(&clp->cl_lock);
0629e370
AB		 404 /* Check sequence flags */
405 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 406 }
407out:
408 /* The session may be reset by one of the error handlers. */
409 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
410 nfs41_sequence_free_slot(clp, res);
411}
412
510b8175
BH		 413/*
414 * nfs4_find_slot - efficiently look for a free slot
415 *
416 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
417 * If found, we mark the slot as used, update the highest_used_slotid,
418 * and respectively set up the sequence operation args.
419 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 420 *
421 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 422 */
423static u8
424nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
425{
426 int slotid;
427 u8 ret_id = NFS4_MAX_SLOT_TABLE;
428 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
429
510b8175
BH		 430 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
431 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
432 tbl->max_slots);
433 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
434 if (slotid >= tbl->max_slots)
435 goto out;
436 __set_bit(slotid, tbl->used_slots);
437 if (slotid > tbl->highest_used_slotid)
438 tbl->highest_used_slotid = slotid;
439 ret_id = slotid;
440out:
441 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
442 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 443 return ret_id;
444}
445
ce5039c1
AA		 446static int nfs41_setup_sequence(struct nfs4_session *session,
447 struct nfs4_sequence_args *args,
448 struct nfs4_sequence_res *res,
449 int cache_reply,
450 struct rpc_task *task)
451{
fbcd4abc
AA		 452 struct nfs4_slot *slot;
453 struct nfs4_slot_table *tbl;
454 u8 slotid;
455
456 dprintk("--> %s\n", __func__);
ce5039c1
AA		 457 /* slot already allocated? */
458 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
459 return 0;
460
461 memset(res, 0, sizeof(*res));
462 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 463 tbl = &session->fc_slot_table;
464
465 spin_lock(&tbl->slot_tbl_lock);
0b9e2d41 466 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
ea028ac9
AA		 467 /*
468 * The state manager will wait until the slot table is empty.
469 * Schedule the reset thread
470 */
471 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236
AA		 472 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
473 nfs4_schedule_state_manager(session->clp);
b069d94a 474 spin_unlock(&tbl->slot_tbl_lock);
05f0d236 475 return -EAGAIN;
b069d94a
AA		 476 }
477
fbcd4abc
AA		 478 slotid = nfs4_find_slot(tbl, task);
479 if (slotid == NFS4_MAX_SLOT_TABLE) {
480 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
481 spin_unlock(&tbl->slot_tbl_lock);
482 dprintk("<-- %s: no free slots\n", __func__);
483 return -EAGAIN;
484 }
485 spin_unlock(&tbl->slot_tbl_lock);
486
487 slot = tbl->slots + slotid;
99fe60d0 488 args->sa_session = session;
fbcd4abc
AA		 489 args->sa_slotid = slotid;
490 args->sa_cache_this = cache_reply;
491
492 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
493
99fe60d0 494 res->sr_session = session;
fbcd4abc
AA		 495 res->sr_slotid = slotid;
496 res->sr_renewal_time = jiffies;
497 /*
498 * sr_status is only set in decode_sequence, and so will remain
499 * set to 1 if an rpc level failure occurs.
500 */
501 res->sr_status = 1;
ce5039c1
AA		 502 return 0;
503}
504
505int nfs4_setup_sequence(struct nfs_client *clp,
506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
508 int cache_reply,
509 struct rpc_task *task)
510{
511 int ret = 0;
512
513 dprintk("--> %s clp %p session %p sr_slotid %d\n",
514 __func__, clp, clp->cl_session, res->sr_slotid);
515
516 if (!nfs4_has_session(clp))
517 goto out;
518 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
519 task);
2628eddf 520 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 521 /* terminate rpc task */
522 task->tk_status = ret;
523 task->tk_action = NULL;
524 }
525out:
526 dprintk("<-- %s status=%d\n", __func__, ret);
527 return ret;
528}
529
530struct nfs41_call_sync_data {
531 struct nfs_client *clp;
532 struct nfs4_sequence_args *seq_args;
533 struct nfs4_sequence_res *seq_res;
534 int cache_reply;
535};
536
537static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
538{
539 struct nfs41_call_sync_data *data = calldata;
540
541 dprintk("--> %s data->clp->cl_session %p\n", __func__,
542 data->clp->cl_session);
543 if (nfs4_setup_sequence(data->clp, data->seq_args,
544 data->seq_res, data->cache_reply, task))
545 return;
546 rpc_call_start(task);
547}
548
69ab40c4
AA		 549static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
550{
551 struct nfs41_call_sync_data *data = calldata;
552
553 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 554}
555
ce5039c1
AA		 556struct rpc_call_ops nfs41_call_sync_ops = {
557 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 558 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 559};
560
561static int nfs4_call_sync_sequence(struct nfs_client *clp,
562 struct rpc_clnt *clnt,
563 struct rpc_message *msg,
564 struct nfs4_sequence_args *args,
565 struct nfs4_sequence_res *res,
566 int cache_reply)
567{
568 int ret;
569 struct rpc_task *task;
570 struct nfs41_call_sync_data data = {
571 .clp = clp,
572 .seq_args = args,
573 .seq_res = res,
574 .cache_reply = cache_reply,
575 };
576 struct rpc_task_setup task_setup = {
577 .rpc_client = clnt,
578 .rpc_message = msg,
579 .callback_ops = &nfs41_call_sync_ops,
580 .callback_data = &data
581 };
582
583 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
584 task = rpc_run_task(&task_setup);
585 if (IS_ERR(task))
586 ret = PTR_ERR(task);
587 else {
588 ret = task->tk_status;
589 rpc_put_task(task);
590 }
591 return ret;
592}
593
cccef3b9
AA		 594int _nfs4_call_sync_session(struct nfs_server *server,
595 struct rpc_message *msg,
596 struct nfs4_sequence_args *args,
597 struct nfs4_sequence_res *res,
598 int cache_reply)
599{
ce5039c1
AA		 600 return nfs4_call_sync_sequence(server->nfs_client, server->client,
601 msg, args, res, cache_reply);
cccef3b9
AA		 602}
603
604#endif /* CONFIG_NFS_V4_1 */
605
606int _nfs4_call_sync(struct nfs_server *server,
607 struct rpc_message *msg,
608 struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res,
610 int cache_reply)
611{
f3752975 612 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 613 return rpc_call_sync(server->client, msg, 0);
614}
615
616#define nfs4_call_sync(server, msg, args, res, cache_reply) \
617 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
618 &(res)->seq_res, (cache_reply))
619
b0df806c
AA		 620static void nfs4_sequence_done(const struct nfs_server *server,
621 struct nfs4_sequence_res *res, int rpc_status)
622{
623#ifdef CONFIG_NFS_V4_1
624 if (nfs4_has_session(server->nfs_client))
625 nfs41_sequence_done(server->nfs_client, res, rpc_status);
626#endif /* CONFIG_NFS_V4_1 */
627}
628
d61e612a 629void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp)
e608e79f
AA		 630{
631#ifdef CONFIG_NFS_V4_1
632 if (nfs4_has_session(clp)) {
e608e79f
AA		 633 rpc_restart_call_prepare(task);
634 return;
635 }
636#endif /* CONFIG_NFS_V4_1 */
637 rpc_restart_call(task);
638}
639
38478b24 640static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 641{
38478b24 642 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 643
38478b24 644 spin_lock(&dir->i_lock);
40d24704
TM		 645 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
646 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 647 nfs_force_lookup_revalidate(dir);
40d24704 648 nfsi->change_attr = cinfo->after;
38478b24 649 spin_unlock(&dir->i_lock);
1da177e4
LT		 650}
651
e56e0b78 652struct nfs4_opendata {
c6d00e63 653 struct kref kref;
e56e0b78
TM		 654 struct nfs_openargs o_arg;
655 struct nfs_openres o_res;
cdd4e68b
TM		 656 struct nfs_open_confirmargs c_arg;
657 struct nfs_open_confirmres c_res;
e56e0b78
TM		 658 struct nfs_fattr f_attr;
659 struct nfs_fattr dir_attr;
ad389da7 660 struct path path;
e56e0b78
TM		 661 struct dentry *dir;
662 struct nfs4_state_owner *owner;
aac00a8d 663 struct nfs4_state *state;
e56e0b78 664 struct iattr attrs;
26e976a8 665 unsigned long timestamp;
3e309914 666 unsigned int rpc_done : 1;
24ac23ab
TM		 667 int rpc_status;
668 int cancelled;
e56e0b78
TM		 669};
670
2ced46c2
TM		 671
672static void nfs4_init_opendata_res(struct nfs4_opendata *p)
673{
674 p->o_res.f_attr = &p->f_attr;
675 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 676 p->o_res.seqid = p->o_arg.seqid;
677 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 678 p->o_res.server = p->o_arg.server;
679 nfs_fattr_init(&p->f_attr);
680 nfs_fattr_init(&p->dir_attr);
578e4585 681 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 682}
683
ad389da7 684static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 685 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 686 const struct iattr *attrs)
687{
ad389da7 688 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 689 struct inode *dir = parent->d_inode;
690 struct nfs_server *server = NFS_SERVER(dir);
691 struct nfs4_opendata *p;
692
693 p = kzalloc(sizeof(*p), GFP_KERNEL);
694 if (p == NULL)
695 goto err;
696 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697 if (p->o_arg.seqid == NULL)
698 goto err_free;
ad389da7
TM		 699 p->path.mnt = mntget(path->mnt);
700 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 701 p->dir = parent;
702 p->owner = sp;
703 atomic_inc(&sp->so_count);
704 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 705 p->o_arg.open_flags = flags;
706 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 707 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 708 p->o_arg.id = sp->so_owner_id.id;
ad389da7 709 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 710 p->o_arg.server = server;
711 p->o_arg.bitmask = server->attr_bitmask;
712 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 713 if (flags & O_EXCL) {
4882ef72
AB		 714 if (nfs4_has_persistent_session(server->nfs_client)) {
715 /* GUARDED */
716 p->o_arg.u.attrs = &p->attrs;
717 memcpy(&p->attrs, attrs, sizeof(p->attrs));
718 } else { /* EXCLUSIVE4_1 */
719 u32 *s = (u32 *) p->o_arg.u.verifier.data;
720 s[0] = jiffies;
721 s[1] = current->pid;
722 }
e56e0b78
TM		 723 } else if (flags & O_CREAT) {
724 p->o_arg.u.attrs = &p->attrs;
725 memcpy(&p->attrs, attrs, sizeof(p->attrs));
726 }
cdd4e68b
TM		 727 p->c_arg.fh = &p->o_res.fh;
728 p->c_arg.stateid = &p->o_res.stateid;
729 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 730 nfs4_init_opendata_res(p);
c6d00e63 731 kref_init(&p->kref);
e56e0b78
TM		 732 return p;
733err_free:
734 kfree(p);
735err:
736 dput(parent);
737 return NULL;
738}
739
c6d00e63 740static void nfs4_opendata_free(struct kref *kref)
e56e0b78 741{
c6d00e63
TM		 742 struct nfs4_opendata *p = container_of(kref,
743 struct nfs4_opendata, kref);
744
745 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 746 if (p->state != NULL)
747 nfs4_put_open_state(p->state);
c6d00e63
TM		 748 nfs4_put_state_owner(p->owner);
749 dput(p->dir);
31f31db1 750 path_put(&p->path);
c6d00e63
TM		 751 kfree(p);
752}
753
754static void nfs4_opendata_put(struct nfs4_opendata *p)
755{
756 if (p != NULL)
757 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 758}
759
06f814a3
TM		 760static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
761{
06f814a3
TM		 762 int ret;
763
06f814a3 764 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 765 return ret;
766}
767
dc0b027d 768static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 769{
770 int ret = 0;
dc0b027d
TM		 771
772 if (open_mode & O_EXCL)
773 goto out;
774 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 775 case FMODE_READ:
776 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 777 break;
778 case FMODE_WRITE:
779 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 780 break;
781 case FMODE_READ|FMODE_WRITE:
782 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
783 }
dc0b027d 784out:
6ee41268
TM		 785 return ret;
786}
787
dc0b027d 788static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 789{
dc0b027d 790 if ((delegation->type & fmode) != fmode)
aac00a8d 791 return 0;
15c831bf 792 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 793 return 0;
b7391f44 794 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 795 return 1;
796}
797
dc0b027d 798static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 799{
dc0b027d 800 switch (fmode) {
e7616923
TM		 801 case FMODE_WRITE:
802 state->n_wronly++;
803 break;
804 case FMODE_READ:
805 state->n_rdonly++;
806 break;
807 case FMODE_READ|FMODE_WRITE:
808 state->n_rdwr++;
809 }
dc0b027d 810 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 811}
812
dc0b027d 813static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 814{
815 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
816 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
817 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 818 switch (fmode) {
003707c7
TM		 819 case FMODE_READ:
820 set_bit(NFS_O_RDONLY_STATE, &state->flags);
821 break;
822 case FMODE_WRITE:
823 set_bit(NFS_O_WRONLY_STATE, &state->flags);
824 break;
825 case FMODE_READ|FMODE_WRITE:
826 set_bit(NFS_O_RDWR_STATE, &state->flags);
827 }
e7616923
TM		 828}
829
dc0b027d 830static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 831{
8bda4e4c 832 write_seqlock(&state->seqlock);
dc0b027d 833 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 834 write_sequnlock(&state->seqlock);
003707c7
TM		 835}
836
dc0b027d 837static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 838{
8bda4e4c
TM		 839 /*
840 * Protect the call to nfs4_state_set_mode_locked and
841 * serialise the stateid update
842 */
843 write_seqlock(&state->seqlock);
003707c7
TM		 844 if (deleg_stateid != NULL) {
845 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
846 set_bit(NFS_DELEGATED_STATE, &state->flags);
847 }
848 if (open_stateid != NULL)
dc0b027d 849 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 850 write_sequnlock(&state->seqlock);
851 spin_lock(&state->owner->so_lock);
dc0b027d 852 update_open_stateflags(state, fmode);
ec073428 853 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 854}
855
dc0b027d 856static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 857{
858 struct nfs_inode *nfsi = NFS_I(state->inode);
859 struct nfs_delegation *deleg_cur;
860 int ret = 0;
861
dc0b027d 862 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 863
864 rcu_read_lock();
865 deleg_cur = rcu_dereference(nfsi->delegation);
866 if (deleg_cur == NULL)
867 goto no_delegation;
868
869 spin_lock(&deleg_cur->lock);
870 if (nfsi->delegation != deleg_cur ||
dc0b027d 871 (deleg_cur->type & fmode) != fmode)
34310430
TM		 872 goto no_delegation_unlock;
873
874 if (delegation == NULL)
875 delegation = &deleg_cur->stateid;
876 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
877 goto no_delegation_unlock;
878
b7391f44 879 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 880 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 881 ret = 1;
882no_delegation_unlock:
883 spin_unlock(&deleg_cur->lock);
884no_delegation:
885 rcu_read_unlock();
886
887 if (!ret && open_stateid != NULL) {
dc0b027d 888 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 889 ret = 1;
890 }
891
892 return ret;
893}
894
895
dc0b027d 896static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 897{
898 struct nfs_delegation *delegation;
899
900 rcu_read_lock();
901 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 902 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 903 rcu_read_unlock();
904 return;
905 }
906 rcu_read_unlock();
907 nfs_inode_return_delegation(inode);
908}
909
6ee41268 910static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 911{
912 struct nfs4_state *state = opendata->state;
913 struct nfs_inode *nfsi = NFS_I(state->inode);
914 struct nfs_delegation *delegation;
dc0b027d
TM		 915 int open_mode = opendata->o_arg.open_flags & O_EXCL;
916 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 917 nfs4_stateid stateid;
918 int ret = -EAGAIN;
919
aac00a8d 920 for (;;) {
dc0b027d 921 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 922 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 923 if (can_open_cached(state, fmode, open_mode)) {
924 update_open_stateflags(state, fmode);
6ee41268 925 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 926 goto out_return_state;
927 }
928 spin_unlock(&state->owner->so_lock);
929 }
34310430
TM		 930 rcu_read_lock();
931 delegation = rcu_dereference(nfsi->delegation);
932 if (delegation == NULL ||
dc0b027d 933 !can_open_delegated(delegation, fmode)) {
34310430 934 rcu_read_unlock();
aac00a8d 935 break;
34310430 936 }
aac00a8d
TM		 937 /* Save the delegation */
938 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
939 rcu_read_unlock();
af22f94a 940 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 941 if (ret != 0)
942 goto out;
943 ret = -EAGAIN;
34310430
TM		 944
945 /* Try to update the stateid using the delegation */
dc0b027d 946 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 947 goto out_return_state;
aac00a8d 948 }
aac00a8d
TM		 949out:
950 return ERR_PTR(ret);
951out_return_state:
952 atomic_inc(&state->count);
953 return state;
954}
955
24ac23ab
TM		 956static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
957{
958 struct inode *inode;
959 struct nfs4_state *state = NULL;
003707c7 960 struct nfs_delegation *delegation;
1b370bc2 961 int ret;
24ac23ab 962
aac00a8d 963 if (!data->rpc_done) {
6ee41268 964 state = nfs4_try_open_cached(data);
aac00a8d
TM		 965 goto out;
966 }
967
1b370bc2 968 ret = -EAGAIN;
24ac23ab 969 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 970 goto err;
24ac23ab 971 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 972 ret = PTR_ERR(inode);
03f28e3a 973 if (IS_ERR(inode))
1b370bc2
TM		 974 goto err;
975 ret = -ENOMEM;
24ac23ab
TM		 976 state = nfs4_get_open_state(inode, data->owner);
977 if (state == NULL)
1b370bc2 978 goto err_put_inode;
549d6ed5 979 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 980 int delegation_flags = 0;
981
003707c7
TM		 982 rcu_read_lock();
983 delegation = rcu_dereference(NFS_I(inode)->delegation);
984 if (delegation)
985 delegation_flags = delegation->flags;
986 rcu_read_unlock();
15c831bf 987 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 988 nfs_inode_set_delegation(state->inode,
989 data->owner->so_cred,
990 &data->o_res);
991 else
992 nfs_inode_reclaim_delegation(state->inode,
993 data->owner->so_cred,
994 &data->o_res);
995 }
34310430
TM		 996
997 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 998 data->o_arg.fmode);
24ac23ab 999 iput(inode);
aac00a8d 1000out:
24ac23ab 1001 return state;
1b370bc2
TM		 1002err_put_inode:
1003 iput(inode);
1004err:
1005 return ERR_PTR(ret);
24ac23ab
TM		 1006}
1007
864472e9
TM		 1008static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1009{
1010 struct nfs_inode *nfsi = NFS_I(state->inode);
1011 struct nfs_open_context *ctx;
1012
1013 spin_lock(&state->inode->i_lock);
1014 list_for_each_entry(ctx, &nfsi->open_files, list) {
1015 if (ctx->state != state)
1016 continue;
1017 get_nfs_open_context(ctx);
1018 spin_unlock(&state->inode->i_lock);
1019 return ctx;
1020 }
1021 spin_unlock(&state->inode->i_lock);
1022 return ERR_PTR(-ENOENT);
1023}
1024
6f220ed5
TM		 1025static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1026{
1027 struct nfs4_opendata *opendata;
1028
dc0b027d 1029 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1030 if (opendata == NULL)
1031 return ERR_PTR(-ENOMEM);
1032 opendata->state = state;
1033 atomic_inc(&state->count);
1034 return opendata;
1035}
1036
dc0b027d 1037static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1038{
2ced46c2 1039 struct nfs4_state *newstate;
864472e9
TM		 1040 int ret;
1041
dc0b027d
TM		 1042 opendata->o_arg.open_flags = 0;
1043 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1044 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1045 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1046 nfs4_init_opendata_res(opendata);
864472e9
TM		 1047 ret = _nfs4_proc_open(opendata);
1048 if (ret != 0)
1049 return ret;
2ced46c2 1050 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1051 if (IS_ERR(newstate))
1052 return PTR_ERR(newstate);
dc0b027d 1053 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1054 *res = newstate;
864472e9
TM		 1055 return 0;
1056}
1057
1058static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1059{
864472e9 1060 struct nfs4_state *newstate;
864472e9
TM		 1061 int ret;
1062
1063 /* memory barrier prior to reading state->n_* */
2ced46c2 1064 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1065 smp_rmb();
1066 if (state->n_rdwr != 0) {
2ced46c2 1067 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1068 if (ret != 0)
1069 return ret;
2ced46c2
TM		 1070 if (newstate != state)
1071 return -ESTALE;
864472e9
TM		 1072 }
1073 if (state->n_wronly != 0) {
2ced46c2 1074 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1075 if (ret != 0)
1076 return ret;
2ced46c2
TM		 1077 if (newstate != state)
1078 return -ESTALE;
864472e9
TM		 1079 }
1080 if (state->n_rdonly != 0) {
2ced46c2 1081 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1082 if (ret != 0)
1083 return ret;
2ced46c2
TM		 1084 if (newstate != state)
1085 return -ESTALE;
864472e9 1086 }
1ac7e2fd
TM		 1087 /*
1088 * We may have performed cached opens for all three recoveries.
1089 * Check if we need to update the current stateid.
1090 */
1091 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1092 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1093 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1095 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1096 write_sequnlock(&state->seqlock);
1ac7e2fd 1097 }
864472e9
TM		 1098 return 0;
1099}
1100
1da177e4
LT		 1101/*
1102 * OPEN_RECLAIM:
1103 * reclaim state on the server after a reboot.
1da177e4 1104 */
539cd03a 1105static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1106{
1ac7e2fd 1107 struct nfs_delegation *delegation;
864472e9 1108 struct nfs4_opendata *opendata;
dc0b027d 1109 fmode_t delegation_type = 0;
1da177e4
LT		 1110 int status;
1111
6f220ed5
TM		 1112 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1113 if (IS_ERR(opendata))
1114 return PTR_ERR(opendata);
864472e9
TM		 1115 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1116 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1117 rcu_read_lock();
1118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1119 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1120 delegation_type = delegation->type;
1ac7e2fd 1121 rcu_read_unlock();
864472e9
TM		 1122 opendata->o_arg.u.delegation_type = delegation_type;
1123 status = nfs4_open_recover(opendata, state);
c6d00e63 1124 nfs4_opendata_put(opendata);
1da177e4
LT		 1125 return status;
1126}
1127
539cd03a 1128static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1129{
1130 struct nfs_server *server = NFS_SERVER(state->inode);
1131 struct nfs4_exception exception = { };
1132 int err;
1133 do {
539cd03a 1134 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1135 if (err != -NFS4ERR_DELAY)
1136 break;
1137 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1138 } while (exception.retry);
1139 return err;
1140}
1141
864472e9
TM		 1142static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1143{
1144 struct nfs_open_context *ctx;
1145 int ret;
1146
1147 ctx = nfs4_state_find_open_context(state);
1148 if (IS_ERR(ctx))
1149 return PTR_ERR(ctx);
539cd03a 1150 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1151 put_nfs_open_context(ctx);
1152 return ret;
1153}
1154
13437e12 1155static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1156{
e56e0b78 1157 struct nfs4_opendata *opendata;
864472e9 1158 int ret;
1da177e4 1159
6f220ed5
TM		 1160 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1161 if (IS_ERR(opendata))
1162 return PTR_ERR(opendata);
e56e0b78 1163 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1164 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1165 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1166 ret = nfs4_open_recover(opendata, state);
c6d00e63 1167 nfs4_opendata_put(opendata);
864472e9 1168 return ret;
1da177e4
LT		 1169}
1170
13437e12 1171int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1172{
1173 struct nfs4_exception exception = { };
539cd03a 1174 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1175 int err;
1176 do {
13437e12 1177 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1178 switch (err) {
1179 case 0:
965b5d67
TM		 1180 case -ENOENT:
1181 case -ESTALE:
1182 goto out;
1da177e4
LT		 1183 case -NFS4ERR_STALE_CLIENTID:
1184 case -NFS4ERR_STALE_STATEID:
1185 case -NFS4ERR_EXPIRED:
1186 /* Don't recall a delegation if it was lost */
7539bbab 1187 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1188 goto out;
1189 case -ERESTARTSYS:
1190 /*
1191 * The show must go on: exit, but mark the
1192 * stateid as needing recovery.
1193 */
1194 case -NFS4ERR_ADMIN_REVOKED:
1195 case -NFS4ERR_BAD_STATEID:
1196 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1197 case -ENOMEM:
1198 err = 0;
1199 goto out;
1da177e4
LT		 1200 }
1201 err = nfs4_handle_exception(server, err, &exception);
1202 } while (exception.retry);
965b5d67 1203out:
1da177e4
LT		 1204 return err;
1205}
1206
cdd4e68b
TM		 1207static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1208{
1209 struct nfs4_opendata *data = calldata;
1210
1211 data->rpc_status = task->tk_status;
1212 if (RPC_ASSASSINATED(task))
1213 return;
26e976a8 1214 if (data->rpc_status == 0) {
cdd4e68b
TM		 1215 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1216 sizeof(data->o_res.stateid.data));
bb22629e 1217 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1218 renew_lease(data->o_res.server, data->timestamp);
3e309914 1219 data->rpc_done = 1;
26e976a8 1220 }
cdd4e68b
TM		 1221}
1222
1223static void nfs4_open_confirm_release(void *calldata)
1224{
1225 struct nfs4_opendata *data = calldata;
1226 struct nfs4_state *state = NULL;
1227
1228 /* If this request hasn't been cancelled, do nothing */
1229 if (data->cancelled == 0)
1230 goto out_free;
1231 /* In case of error, no cleanup! */
3e309914 1232 if (!data->rpc_done)
cdd4e68b 1233 goto out_free;
cdd4e68b 1234 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1235 if (!IS_ERR(state))
dc0b027d 1236 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1237out_free:
c6d00e63 1238 nfs4_opendata_put(data);
cdd4e68b
TM		 1239}
1240
1241static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1242 .rpc_call_done = nfs4_open_confirm_done,
1243 .rpc_release = nfs4_open_confirm_release,
1244};
1245
1246/*
1247 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1248 */
1249static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1250{
1251 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1252 struct rpc_task *task;
5138fde0
TM		 1253 struct rpc_message msg = {
1254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1255 .rpc_argp = &data->c_arg,
1256 .rpc_resp = &data->c_res,
1257 .rpc_cred = data->owner->so_cred,
1258 };
c970aa85
TM		 1259 struct rpc_task_setup task_setup_data = {
1260 .rpc_client = server->client,
5138fde0 1261 .rpc_message = &msg,
c970aa85
TM		 1262 .callback_ops = &nfs4_open_confirm_ops,
1263 .callback_data = data,
101070ca 1264 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1265 .flags = RPC_TASK_ASYNC,
1266 };
1da177e4
LT		 1267 int status;
1268
c6d00e63 1269 kref_get(&data->kref);
3e309914
TM		 1270 data->rpc_done = 0;
1271 data->rpc_status = 0;
5138fde0 1272 data->timestamp = jiffies;
c970aa85 1273 task = rpc_run_task(&task_setup_data);
7a1218a2 1274 if (IS_ERR(task))
cdd4e68b 1275 return PTR_ERR(task);
cdd4e68b
TM		 1276 status = nfs4_wait_for_completion_rpc_task(task);
1277 if (status != 0) {
1278 data->cancelled = 1;
1279 smp_wmb();
1280 } else
1281 status = data->rpc_status;
e6b3c4db 1282 rpc_put_task(task);
1da177e4
LT		 1283 return status;
1284}
1285
24ac23ab 1286static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1287{
24ac23ab
TM		 1288 struct nfs4_opendata *data = calldata;
1289 struct nfs4_state_owner *sp = data->owner;
5138fde0 1290
24ac23ab
TM		 1291 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1292 return;
aac00a8d
TM		 1293 /*
1294 * Check if we still need to send an OPEN call, or if we can use
1295 * a delegation instead.
1296 */
1297 if (data->state != NULL) {
1298 struct nfs_delegation *delegation;
1299
dc0b027d 1300 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1301 goto out_no_action;
aac00a8d
TM		 1302 rcu_read_lock();
1303 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1304 if (delegation != NULL &&
15c831bf 1305 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1306 rcu_read_unlock();
6ee41268 1307 goto out_no_action;
aac00a8d
TM		 1308 }
1309 rcu_read_unlock();
1310 }
24ac23ab 1311 /* Update sequence id. */
9f958ab8 1312 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1313 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1314 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1315 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1316 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1317 }
26e976a8 1318 data->timestamp = jiffies;
d898528c
AA		 1319 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1320 &data->o_arg.seq_args,
1321 &data->o_res.seq_res, 1, task))
1322 return;
5138fde0 1323 rpc_call_start(task);
6ee41268
TM		 1324 return;
1325out_no_action:
1326 task->tk_action = NULL;
1327
24ac23ab 1328}
1da177e4 1329
24ac23ab
TM		 1330static void nfs4_open_done(struct rpc_task *task, void *calldata)
1331{
1332 struct nfs4_opendata *data = calldata;
1da177e4 1333
24ac23ab 1334 data->rpc_status = task->tk_status;
d898528c 1335
d61e612a
TM		 1336 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1337 task->tk_status);
d898528c 1338
24ac23ab
TM		 1339 if (RPC_ASSASSINATED(task))
1340 return;
1341 if (task->tk_status == 0) {
1342 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1343 case S_IFREG:
1344 break;
1345 case S_IFLNK:
24ac23ab 1346 data->rpc_status = -ELOOP;
6f926b5b
TM		 1347 break;
1348 case S_IFDIR:
24ac23ab 1349 data->rpc_status = -EISDIR;
6f926b5b
TM		 1350 break;
1351 default:
24ac23ab 1352 data->rpc_status = -ENOTDIR;
6f926b5b 1353 }
26e976a8 1354 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1355 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1356 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1357 }
3e309914 1358 data->rpc_done = 1;
24ac23ab 1359}
6f926b5b 1360
24ac23ab
TM		 1361static void nfs4_open_release(void *calldata)
1362{
1363 struct nfs4_opendata *data = calldata;
1364 struct nfs4_state *state = NULL;
1365
1366 /* If this request hasn't been cancelled, do nothing */
1367 if (data->cancelled == 0)
1368 goto out_free;
1369 /* In case of error, no cleanup! */
3e309914 1370 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1371 goto out_free;
1372 /* In case we need an open_confirm, no cleanup! */
1373 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1374 goto out_free;
24ac23ab 1375 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1376 if (!IS_ERR(state))
dc0b027d 1377 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1378out_free:
c6d00e63 1379 nfs4_opendata_put(data);
24ac23ab
TM		 1380}
1381
1382static const struct rpc_call_ops nfs4_open_ops = {
1383 .rpc_call_prepare = nfs4_open_prepare,
1384 .rpc_call_done = nfs4_open_done,
1385 .rpc_release = nfs4_open_release,
1386};
1387
1388/*
1389 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1390 */
1391static int _nfs4_proc_open(struct nfs4_opendata *data)
1392{
1393 struct inode *dir = data->dir->d_inode;
1394 struct nfs_server *server = NFS_SERVER(dir);
1395 struct nfs_openargs *o_arg = &data->o_arg;
1396 struct nfs_openres *o_res = &data->o_res;
1397 struct rpc_task *task;
5138fde0
TM		 1398 struct rpc_message msg = {
1399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1400 .rpc_argp = o_arg,
1401 .rpc_resp = o_res,
1402 .rpc_cred = data->owner->so_cred,
1403 };
c970aa85
TM		 1404 struct rpc_task_setup task_setup_data = {
1405 .rpc_client = server->client,
5138fde0 1406 .rpc_message = &msg,
c970aa85
TM		 1407 .callback_ops = &nfs4_open_ops,
1408 .callback_data = data,
101070ca 1409 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1410 .flags = RPC_TASK_ASYNC,
1411 };
24ac23ab
TM		 1412 int status;
1413
c6d00e63 1414 kref_get(&data->kref);
3e309914
TM		 1415 data->rpc_done = 0;
1416 data->rpc_status = 0;
2ced46c2 1417 data->cancelled = 0;
c970aa85 1418 task = rpc_run_task(&task_setup_data);
7a1218a2 1419 if (IS_ERR(task))
24ac23ab 1420 return PTR_ERR(task);
24ac23ab
TM		 1421 status = nfs4_wait_for_completion_rpc_task(task);
1422 if (status != 0) {
1423 data->cancelled = 1;
1424 smp_wmb();
1425 } else
1426 status = data->rpc_status;
e6b3c4db 1427 rpc_put_task(task);
3e309914 1428 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1429 return status;
1430
9936781d
TM		 1431 if (o_res->fh.size == 0)
1432 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1433
56ae19f3
TM		 1434 if (o_arg->open_flags & O_CREAT) {
1435 update_changeattr(dir, &o_res->cinfo);
1436 nfs_post_op_update_inode(dir, o_res->dir_attr);
1437 } else
1438 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1439 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1440 status = _nfs4_proc_open_confirm(data);
1da177e4 1441 if (status != 0)
24ac23ab 1442 return status;
1da177e4
LT		 1443 }
1444 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1445 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1446 return 0;
1da177e4
LT		 1447}
1448
10afec90 1449static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1450{
7539bbab 1451 struct nfs_client *clp = server->nfs_client;
a78cb57a 1452 unsigned int loop;
6b30954e 1453 int ret;
58d9714a 1454
a78cb57a 1455 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1456 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1457 if (ret != 0)
a78cb57a 1458 break;
e598d843
TM		 1459 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1460 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1461 break;
58d9714a 1462 nfs4_schedule_state_recovery(clp);
a78cb57a 1463 ret = -EIO;
6b30954e 1464 }
a78cb57a 1465 return ret;
58d9714a
TM		 1466}
1467
1da177e4
LT		 1468/*
1469 * OPEN_EXPIRED:
1470 * reclaim state on the server after a network partition.
1471 * Assumes caller holds the appropriate lock
1472 */
539cd03a 1473static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1474{
e56e0b78 1475 struct nfs4_opendata *opendata;
864472e9 1476 int ret;
1da177e4 1477
6f220ed5
TM		 1478 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1479 if (IS_ERR(opendata))
1480 return PTR_ERR(opendata);
864472e9 1481 ret = nfs4_open_recover(opendata, state);
35d05778 1482 if (ret == -ESTALE)
539cd03a 1483 d_drop(ctx->path.dentry);
c6d00e63 1484 nfs4_opendata_put(opendata);
864472e9 1485 return ret;
1da177e4
LT		 1486}
1487
a9ed2e25 1488static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1489{
539cd03a 1490 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1491 struct nfs4_exception exception = { };
1492 int err;
1493
1494 do {
539cd03a 1495 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1496 switch (err) {
1497 default:
1498 goto out;
1499 case -NFS4ERR_GRACE:
1500 case -NFS4ERR_DELAY:
1501 nfs4_handle_exception(server, err, &exception);
1502 err = 0;
1503 }
202b50dc 1504 } while (exception.retry);
a9ed2e25 1505out:
202b50dc
TM		 1506 return err;
1507}
1508
1da177e4
LT		 1509static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1510{
1da177e4 1511 struct nfs_open_context *ctx;
864472e9 1512 int ret;
1da177e4 1513
864472e9
TM		 1514 ctx = nfs4_state_find_open_context(state);
1515 if (IS_ERR(ctx))
1516 return PTR_ERR(ctx);
539cd03a 1517 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1518 put_nfs_open_context(ctx);
1519 return ret;
1da177e4
LT		 1520}
1521
aa53ed54
JL		 1522/*
1523 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1524 * fields corresponding to attributes that were used to store the verifier.
1525 * Make sure we clobber those fields in the later setattr call
1526 */
1527static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1528{
1529 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1530 !(sattr->ia_valid & ATTR_ATIME_SET))
1531 sattr->ia_valid |= ATTR_ATIME;
1532
1533 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1534 !(sattr->ia_valid & ATTR_MTIME_SET))
1535 sattr->ia_valid |= ATTR_MTIME;
1536}
1537
1da177e4 1538/*
24ac23ab 1539 * Returns a referenced nfs4_state
1da177e4 1540 */
dc0b027d 1541static 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		 1542{
1543 struct nfs4_state_owner *sp;
1544 struct nfs4_state *state = NULL;
1545 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1546 struct nfs4_opendata *opendata;
aac00a8d 1547 int status;
1da177e4
LT		 1548
1549 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1550 status = -ENOMEM;
1551 if (!(sp = nfs4_get_state_owner(server, cred))) {
1552 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1553 goto out_err;
1554 }
58d9714a
TM		 1555 status = nfs4_recover_expired_lease(server);
1556 if (status != 0)
b4454fe1 1557 goto err_put_state_owner;
aac00a8d 1558 if (path->dentry->d_inode != NULL)
dc0b027d 1559 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1560 status = -ENOMEM;
dc0b027d 1561 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1562 if (opendata == NULL)
95d35cb4 1563 goto err_put_state_owner;
1da177e4 1564
aac00a8d
TM		 1565 if (path->dentry->d_inode != NULL)
1566 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1567
24ac23ab 1568 status = _nfs4_proc_open(opendata);
1da177e4 1569 if (status != 0)
c6d00e63 1570 goto err_opendata_put;
1da177e4 1571
aa53ed54
JL		 1572 if (opendata->o_arg.open_flags & O_EXCL)
1573 nfs4_exclusive_attrset(opendata, sattr);
1574
24ac23ab 1575 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1576 status = PTR_ERR(state);
1577 if (IS_ERR(state))
c6d00e63 1578 goto err_opendata_put;
c6d00e63 1579 nfs4_opendata_put(opendata);
1da177e4 1580 nfs4_put_state_owner(sp);
1da177e4
LT		 1581 *res = state;
1582 return 0;
c6d00e63
TM		 1583err_opendata_put:
1584 nfs4_opendata_put(opendata);
e56e0b78
TM		 1585err_put_state_owner:
1586 nfs4_put_state_owner(sp);
1da177e4 1587out_err:
1da177e4
LT		 1588 *res = NULL;
1589 return status;
1590}
1591
1592
dc0b027d 1593static 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		 1594{
1595 struct nfs4_exception exception = { };
1596 struct nfs4_state *res;
1597 int status;
1598
1599 do {
dc0b027d 1600 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1601 if (status == 0)
1602 break;
1603 /* NOTE: BAD_SEQID means the server and client disagree about the
1604 * book-keeping w.r.t. state-changing operations
1605 * (OPEN/CLOSE/LOCK/LOCKU...)
1606 * It is actually a sign of a bug on the client or on the server.
1607 *
1608 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1609 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1610 * have unhashed the old state_owner for us, and that we can
1611 * therefore safely retry using a new one. We should still warn
1612 * the user though...
1613 */
1614 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1615 printk(KERN_WARNING "NFS: v4 server %s "
1616 " returned a bad sequence-id error!\n",
1617 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1618 exception.retry = 1;
1619 continue;
1620 }
550f5747
TM		 1621 /*
1622 * BAD_STATEID on OPEN means that the server cancelled our
1623 * state before it received the OPEN_CONFIRM.
1624 * Recover by retrying the request as per the discussion
1625 * on Page 181 of RFC3530.
1626 */
1627 if (status == -NFS4ERR_BAD_STATEID) {
1628 exception.retry = 1;
1629 continue;
1630 }
aac00a8d
TM		 1631 if (status == -EAGAIN) {
1632 /* We must have found a delegation */
1633 exception.retry = 1;
1634 continue;
1635 }
1da177e4
LT		 1636 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1637 status, &exception));
1638 } while (exception.retry);
1639 return res;
1640}
1641
659bfcd6
TM		 1642static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1643 struct nfs_fattr *fattr, struct iattr *sattr,
1644 struct nfs4_state *state)
1da177e4 1645{
3e4f6290 1646 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1647 struct nfs_setattrargs arg = {
3e4f6290 1648 .fh = NFS_FH(inode),
1da177e4
LT		 1649 .iap = sattr,
1650 .server = server,
1651 .bitmask = server->attr_bitmask,
1652 };
1653 struct nfs_setattrres res = {
1654 .fattr = fattr,
1655 .server = server,
1656 };
1657 struct rpc_message msg = {
659bfcd6
TM		 1658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1659 .rpc_argp = &arg,
1660 .rpc_resp = &res,
1661 .rpc_cred = cred,
1da177e4 1662 };
26e976a8 1663 unsigned long timestamp = jiffies;
65e4308d 1664 int status;
1da177e4 1665
0e574af1 1666 nfs_fattr_init(fattr);
1da177e4 1667
3e4f6290
TM		 1668 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1669 /* Use that stateid */
1670 } else if (state != NULL) {
08e9eac4
TM		 1671 nfs4_copy_stateid(&arg.stateid, state, current->files);
1672 } else
1da177e4
LT		 1673 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1674
cccef3b9 1675 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1676 if (status == 0 && state != NULL)
1677 renew_lease(server, timestamp);
65e4308d 1678 return status;
1da177e4
LT		 1679}
1680
659bfcd6
TM		 1681static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1682 struct nfs_fattr *fattr, struct iattr *sattr,
1683 struct nfs4_state *state)
1da177e4 1684{
3e4f6290 1685 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1686 struct nfs4_exception exception = { };
1687 int err;
1688 do {
1689 err = nfs4_handle_exception(server,
659bfcd6 1690 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1691 &exception);
1692 } while (exception.retry);
1693 return err;
1694}
1695
1696struct nfs4_closedata {
4a35bd41 1697 struct path path;
1da177e4
LT		 1698 struct inode *inode;
1699 struct nfs4_state *state;
1700 struct nfs_closeargs arg;
1701 struct nfs_closeres res;
516a6af6 1702 struct nfs_fattr fattr;
26e976a8 1703 unsigned long timestamp;
1da177e4
LT		 1704};
1705
963d8fe5 1706static void nfs4_free_closedata(void *data)
9512135d 1707{
963d8fe5
TM		 1708 struct nfs4_closedata *calldata = data;
1709 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1710
1711 nfs4_put_open_state(calldata->state);
1712 nfs_free_seqid(calldata->arg.seqid);
9512135d 1713 nfs4_put_state_owner(sp);
31f31db1 1714 path_put(&calldata->path);
9512135d
TM		 1715 kfree(calldata);
1716}
1717
963d8fe5 1718static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1719{
963d8fe5 1720 struct nfs4_closedata *calldata = data;
1da177e4 1721 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1722 struct nfs_server *server = NFS_SERVER(calldata->inode);
1723
19ddab06 1724 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1725 if (RPC_ASSASSINATED(task))
1726 return;
1da177e4
LT		 1727 /* hmm. we are done with the inode, and in the process of freeing
1728 * the state_owner. we keep this around to process errors
1729 */
1da177e4
LT		 1730 switch (task->tk_status) {
1731 case 0:
45328c35 1732 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1733 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1734 break;
1735 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1736 case -NFS4ERR_OLD_STATEID:
1737 case -NFS4ERR_BAD_STATEID:
1da177e4 1738 case -NFS4ERR_EXPIRED:
dc0b027d 1739 if (calldata->arg.fmode == 0)
9e33bed5 1740 break;
1da177e4 1741 default:
9e33bed5 1742 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
d61e612a 1743 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1744 return;
1745 }
1746 }
516a6af6 1747 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1748}
1749
4ce70ada 1750static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1751{
4ce70ada 1752 struct nfs4_closedata *calldata = data;
9512135d 1753 struct nfs4_state *state = calldata->state;
003707c7 1754 int clear_rd, clear_wr, clear_rdwr;
9512135d 1755
963d8fe5 1756 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1757 return;
003707c7 1758
003707c7 1759 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1760 spin_lock(&state->owner->so_lock);
003707c7 1761 /* Calculate the change in open mode */
e7616923 1762 if (state->n_rdwr == 0) {
003707c7 1763 if (state->n_rdonly == 0) {
003707c7
TM		 1764 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1765 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1766 }
1767 if (state->n_wronly == 0) {
003707c7
TM		 1768 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1769 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1770 }
e7616923 1771 }
4cecb76f 1772 spin_unlock(&state->owner->so_lock);
003707c7 1773 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1774 /* Note: exit _without_ calling nfs4_close_done */
1775 task->tk_action = NULL;
9512135d
TM		 1776 return;
1777 }
516a6af6 1778 nfs_fattr_init(calldata->res.fattr);
45328c35 1779 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1780 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1781 calldata->arg.fmode = FMODE_READ;
45328c35 1782 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1783 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1784 calldata->arg.fmode = FMODE_WRITE;
45328c35 1785 }
26e976a8 1786 calldata->timestamp = jiffies;
19ddab06
AA		 1787 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1788 &calldata->arg.seq_args, &calldata->res.seq_res,
1789 1, task))
1790 return;
5138fde0 1791 rpc_call_start(task);
1da177e4
LT		 1792}
1793
963d8fe5 1794static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1795 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1796 .rpc_call_done = nfs4_close_done,
1797 .rpc_release = nfs4_free_closedata,
1798};
1799
1da177e4
LT		 1800/*
1801 * It is possible for data to be read/written from a mem-mapped file
1802 * after the sys_close call (which hits the vfs layer as a flush).
1803 * This means that we can't safely call nfsv4 close on a file until
1804 * the inode is cleared. This in turn means that we are not good
1805 * NFSv4 citizens - we do not indicate to the server to update the file's
1806 * share state even when we are done with one of the three share
1807 * stateid's in the inode.
1808 *
1809 * NOTE: Caller must be holding the sp->so_owner semaphore!
1810 */
a49c3c77 1811int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1812{
4a35bd41 1813 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1814 struct nfs4_closedata *calldata;
b39e625b
TM		 1815 struct nfs4_state_owner *sp = state->owner;
1816 struct rpc_task *task;
5138fde0
TM		 1817 struct rpc_message msg = {
1818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1819 .rpc_cred = state->owner->so_cred,
1820 };
c970aa85
TM		 1821 struct rpc_task_setup task_setup_data = {
1822 .rpc_client = server->client,
5138fde0 1823 .rpc_message = &msg,
c970aa85 1824 .callback_ops = &nfs4_close_ops,
101070ca 1825 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1826 .flags = RPC_TASK_ASYNC,
1827 };
9512135d 1828 int status = -ENOMEM;
1da177e4 1829
19ddab06 1830 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1831 if (calldata == NULL)
9512135d 1832 goto out;
4a35bd41 1833 calldata->inode = state->inode;
1da177e4 1834 calldata->state = state;
4a35bd41 1835 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1836 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1837 if (nfs4_has_session(server->nfs_client))
1838 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1839 /* Serialization for the sequence id */
cee54fc9 1840 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1841 if (calldata->arg.seqid == NULL)
1842 goto out_free_calldata;
dc0b027d 1843 calldata->arg.fmode = 0;
a65318bf 1844 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1845 calldata->res.fattr = &calldata->fattr;
c1d51931 1846 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1847 calldata->res.server = server;
5f7dbd5c 1848 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1849 calldata->path.mnt = mntget(path->mnt);
1850 calldata->path.dentry = dget(path->dentry);
9512135d 1851
5138fde0
TM		 1852 msg.rpc_argp = &calldata->arg,
1853 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1854 task_setup_data.callback_data = calldata;
1855 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1856 if (IS_ERR(task))
1857 return PTR_ERR(task);
a49c3c77
TM		 1858 status = 0;
1859 if (wait)
1860 status = rpc_wait_for_completion_task(task);
b39e625b 1861 rpc_put_task(task);
a49c3c77 1862 return status;
9512135d
TM		 1863out_free_calldata:
1864 kfree(calldata);
1865out:
b39e625b
TM		 1866 nfs4_put_open_state(state);
1867 nfs4_put_state_owner(sp);
9512135d 1868 return status;
1da177e4
LT		 1869}
1870
dc0b027d 1871static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1872{
1873 struct file *filp;
1b45c46c 1874 int ret;
02a913a7 1875
1b45c46c 1876 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1877 if (fmode & FMODE_EXEC) {
af22f94a 1878 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1879 state->owner->so_cred,
1880 nd->intent.open.flags);
1881 if (ret < 0)
1882 goto out_close;
1883 }
4a35bd41 1884 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1885 if (!IS_ERR(filp)) {
1886 struct nfs_open_context *ctx;
cd3758e3 1887 ctx = nfs_file_open_context(filp);
02a913a7 1888 ctx->state = state;
95cf959b
TM		 1889 return 0;
1890 }
1b45c46c
TM		 1891 ret = PTR_ERR(filp);
1892out_close:
dc0b027d 1893 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1894 return ret;
02a913a7
TM		 1895}
1896
1897struct dentry *
1da177e4
LT		 1898nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1899{
ad389da7 1900 struct path path = {
4ac91378 1901 .mnt = nd->path.mnt,
ad389da7
TM		 1902 .dentry = dentry,
1903 };
4ac91378 1904 struct dentry *parent;
1da177e4
LT		 1905 struct iattr attr;
1906 struct rpc_cred *cred;
1907 struct nfs4_state *state;
02a913a7 1908 struct dentry *res;
dc0b027d 1909 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1910
1911 if (nd->flags & LOOKUP_CREATE) {
1912 attr.ia_mode = nd->intent.open.create_mode;
1913 attr.ia_valid = ATTR_MODE;
1914 if (!IS_POSIXACL(dir))
ce3b0f8d 1915 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1916 } else {
1917 attr.ia_valid = 0;
1918 BUG_ON(nd->intent.open.flags & O_CREAT);
1919 }
1920
98a8e323 1921 cred = rpc_lookup_cred();
1da177e4 1922 if (IS_ERR(cred))
02a913a7 1923 return (struct dentry *)cred;
565277f6
TM		 1924 parent = dentry->d_parent;
1925 /* Protect against concurrent sillydeletes */
1926 nfs_block_sillyrename(parent);
dc0b027d 1927 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1928 put_rpccred(cred);
02a913a7 1929 if (IS_ERR(state)) {
d75340cc 1930 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1931 d_add(dentry, NULL);
d75340cc
TM		 1932 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1933 }
565277f6 1934 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1935 return (struct dentry *)state;
1936 }
24ac23ab 1937 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1938 if (res != NULL)
deee9369 1939 path.dentry = res;
d75340cc 1940 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1941 nfs_unblock_sillyrename(parent);
dc0b027d 1942 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1943 return res;
1da177e4
LT		 1944}
1945
1946int
02a913a7 1947nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1948{
ad389da7 1949 struct path path = {
4ac91378 1950 .mnt = nd->path.mnt,
ad389da7
TM		 1951 .dentry = dentry,
1952 };
1da177e4
LT		 1953 struct rpc_cred *cred;
1954 struct nfs4_state *state;
dc0b027d 1955 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1956
98a8e323 1957 cred = rpc_lookup_cred();
1da177e4
LT		 1958 if (IS_ERR(cred))
1959 return PTR_ERR(cred);
dc0b027d 1960 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1961 put_rpccred(cred);
02a913a7
TM		 1962 if (IS_ERR(state)) {
1963 switch (PTR_ERR(state)) {
1964 case -EPERM:
1965 case -EACCES:
1966 case -EDQUOT:
1967 case -ENOSPC:
1968 case -EROFS:
1969 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1970 return 1;
b87c0adf
CL		 1971 default:
1972 goto out_drop;
02a913a7 1973 }
02a913a7 1974 }
24ac23ab 1975 if (state->inode == dentry->d_inode) {
d75340cc 1976 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1977 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1978 return 1;
1979 }
dc0b027d 1980 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1981out_drop:
1982 d_drop(dentry);
1da177e4
LT		 1983 return 0;
1984}
1985
1185a552 1986static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 1987{
1988 if (ctx->state == NULL)
1989 return;
1990 if (is_sync)
1991 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1992 else
1993 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1994}
1da177e4
LT		 1995
1996static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1997{
43652ad5
BH		 1998 struct nfs4_server_caps_arg args = {
1999 .fhandle = fhandle,
2000 };
1da177e4
LT		 2001 struct nfs4_server_caps_res res = {};
2002 struct rpc_message msg = {
2003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2004 .rpc_argp = &args,
1da177e4
LT		 2005 .rpc_resp = &res,
2006 };
2007 int status;
2008
cccef3b9 2009 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2010 if (status == 0) {
2011 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2012 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2013 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2014 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2015 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2016 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2017 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2018 server->caps |= NFS_CAP_ACLS;
2019 if (res.has_links != 0)
2020 server->caps |= NFS_CAP_HARDLINKS;
2021 if (res.has_symlinks != 0)
2022 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2023 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2024 server->caps |= NFS_CAP_FILEID;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2026 server->caps |= NFS_CAP_MODE;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2028 server->caps |= NFS_CAP_NLINK;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2030 server->caps |= NFS_CAP_OWNER;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2032 server->caps |= NFS_CAP_OWNER_GROUP;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2034 server->caps |= NFS_CAP_ATIME;
2035 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2036 server->caps |= NFS_CAP_CTIME;
2037 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2038 server->caps |= NFS_CAP_MTIME;
2039
a65318bf
TM		 2040 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2041 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2042 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2043 server->acl_bitmask = res.acl_bitmask;
2044 }
cccef3b9 2045
1da177e4
LT		 2046 return status;
2047}
2048
55a97593 2049int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2050{
2051 struct nfs4_exception exception = { };
2052 int err;
2053 do {
2054 err = nfs4_handle_exception(server,
2055 _nfs4_server_capabilities(server, fhandle),
2056 &exception);
2057 } while (exception.retry);
2058 return err;
2059}
2060
2061static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2062 struct nfs_fsinfo *info)
2063{
1da177e4
LT		 2064 struct nfs4_lookup_root_arg args = {
2065 .bitmask = nfs4_fattr_bitmap,
2066 };
2067 struct nfs4_lookup_res res = {
2068 .server = server,
0e574af1 2069 .fattr = info->fattr,
1da177e4
LT		 2070 .fh = fhandle,
2071 };
2072 struct rpc_message msg = {
2073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2074 .rpc_argp = &args,
2075 .rpc_resp = &res,
2076 };
008f55d0 2077
0e574af1 2078 nfs_fattr_init(info->fattr);
fccba804 2079 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2080}
2081
2082static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2083 struct nfs_fsinfo *info)
2084{
2085 struct nfs4_exception exception = { };
2086 int err;
2087 do {
2088 err = nfs4_handle_exception(server,
2089 _nfs4_lookup_root(server, fhandle, info),
2090 &exception);
2091 } while (exception.retry);
2092 return err;
2093}
2094
54ceac45
DH		 2095/*
2096 * get the file handle for the "/" directory on the server
2097 */
1da177e4 2098static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2099 struct nfs_fsinfo *info)
1da177e4 2100{
1da177e4
LT		 2101 int status;
2102
1da177e4 2103 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2104 if (status == 0)
2105 status = nfs4_server_capabilities(server, fhandle);
2106 if (status == 0)
2107 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2108 return nfs4_map_errors(status);
1da177e4
LT		 2109}
2110
6b97fd3d
MN		 2111/*
2112 * Get locations and (maybe) other attributes of a referral.
2113 * Note that we'll actually follow the referral later when
2114 * we detect fsid mismatch in inode revalidation
2115 */
56659e99 2116static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2117{
2118 int status = -ENOMEM;
2119 struct page *page = NULL;
2120 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2121
2122 page = alloc_page(GFP_KERNEL);
2123 if (page == NULL)
2124 goto out;
2125 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2126 if (locations == NULL)
2127 goto out;
2128
c228fd3a 2129 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2130 if (status != 0)
2131 goto out;
2132 /* Make sure server returned a different fsid for the referral */
2133 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2134 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2135 status = -EIO;
2136 goto out;
2137 }
2138
2139 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2140 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2141 if (!fattr->mode)
2142 fattr->mode = S_IFDIR;
2143 memset(fhandle, 0, sizeof(struct nfs_fh));
2144out:
2145 if (page)
2146 __free_page(page);
2147 if (locations)
2148 kfree(locations);
2149 return status;
2150}
2151
1da177e4
LT		 2152static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2153{
2154 struct nfs4_getattr_arg args = {
2155 .fh = fhandle,
2156 .bitmask = server->attr_bitmask,
2157 };
2158 struct nfs4_getattr_res res = {
2159 .fattr = fattr,
2160 .server = server,
2161 };
2162 struct rpc_message msg = {
2163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2164 .rpc_argp = &args,
2165 .rpc_resp = &res,
2166 };
2167
0e574af1 2168 nfs_fattr_init(fattr);
cccef3b9 2169 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2170}
2171
2172static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(server,
2178 _nfs4_proc_getattr(server, fhandle, fattr),
2179 &exception);
2180 } while (exception.retry);
2181 return err;
2182}
2183
2184/*
2185 * The file is not closed if it is opened due to the a request to change
2186 * the size of the file. The open call will not be needed once the
2187 * VFS layer lookup-intents are implemented.
2188 *
2189 * Close is called when the inode is destroyed.
2190 * If we haven't opened the file for O_WRONLY, we
2191 * need to in the size_change case to obtain a stateid.
2192 *
2193 * Got race?
2194 * Because OPEN is always done by name in nfsv4, it is
2195 * possible that we opened a different file by the same
2196 * name. We can recognize this race condition, but we
2197 * can't do anything about it besides returning an error.
2198 *
2199 * This will be fixed with VFS changes (lookup-intent).
2200 */
2201static int
2202nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2203 struct iattr *sattr)
2204{
08e9eac4 2205 struct inode *inode = dentry->d_inode;
659bfcd6 2206 struct rpc_cred *cred = NULL;
d530838b 2207 struct nfs4_state *state = NULL;
1da177e4
LT		 2208 int status;
2209
0e574af1 2210 nfs_fattr_init(fattr);
1da177e4 2211
d530838b 2212 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2213 if (sattr->ia_valid & ATTR_FILE) {
2214 struct nfs_open_context *ctx;
2215
2216 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2217 if (ctx) {
2218 cred = ctx->cred;
2219 state = ctx->state;
2220 }
659bfcd6 2221 }
08e9eac4 2222
659bfcd6 2223 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2224 if (status == 0)
2225 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2226 return status;
2227}
2228
56659e99
TM		 2229static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2230 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2231 struct nfs_fattr *fattr)
2232{
2233 int status;
2234 struct nfs4_lookup_arg args = {
2235 .bitmask = server->attr_bitmask,
2236 .dir_fh = dirfh,
2237 .name = name,
2238 };
2239 struct nfs4_lookup_res res = {
2240 .server = server,
2241 .fattr = fattr,
2242 .fh = fhandle,
2243 };
2244 struct rpc_message msg = {
2245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2246 .rpc_argp = &args,
2247 .rpc_resp = &res,
2248 };
2249
2250 nfs_fattr_init(fattr);
2251
2252 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2253 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2254 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2255 return status;
2256}
2257
2258static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2259 struct qstr *name, struct nfs_fh *fhandle,
2260 struct nfs_fattr *fattr)
2261{
2262 struct nfs4_exception exception = { };
2263 int err;
2264 do {
4e56e082
TM		 2265 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2266 /* FIXME: !!!! */
2267 if (err == -NFS4ERR_MOVED) {
2268 err = -EREMOTE;
2269 break;
2270 }
2271 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2272 } while (exception.retry);
2273 return err;
2274}
2275
56659e99 2276static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2277 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2278{
4e56e082 2279 int status;
1da177e4
LT		 2280
2281 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2282 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2283 if (status == -NFS4ERR_MOVED)
2284 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2285 dprintk("NFS reply lookup: %d\n", status);
2286 return status;
2287}
2288
2289static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2290{
2291 struct nfs4_exception exception = { };
2292 int err;
2293 do {
2294 err = nfs4_handle_exception(NFS_SERVER(dir),
2295 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2296 &exception);
2297 } while (exception.retry);
2298 return err;
2299}
2300
2301static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2302{
76b32999
TM		 2303 struct nfs_server *server = NFS_SERVER(inode);
2304 struct nfs_fattr fattr;
1da177e4
LT		 2305 struct nfs4_accessargs args = {
2306 .fh = NFS_FH(inode),
76b32999
TM		 2307 .bitmask = server->attr_bitmask,
2308 };
2309 struct nfs4_accessres res = {
2310 .server = server,
2311 .fattr = &fattr,
1da177e4 2312 };
1da177e4
LT		 2313 struct rpc_message msg = {
2314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2315 .rpc_argp = &args,
2316 .rpc_resp = &res,
2317 .rpc_cred = entry->cred,
2318 };
2319 int mode = entry->mask;
2320 int status;
2321
2322 /*
2323 * Determine which access bits we want to ask for...
2324 */
2325 if (mode & MAY_READ)
2326 args.access |= NFS4_ACCESS_READ;
2327 if (S_ISDIR(inode->i_mode)) {
2328 if (mode & MAY_WRITE)
2329 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2330 if (mode & MAY_EXEC)
2331 args.access |= NFS4_ACCESS_LOOKUP;
2332 } else {
2333 if (mode & MAY_WRITE)
2334 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2335 if (mode & MAY_EXEC)
2336 args.access |= NFS4_ACCESS_EXECUTE;
2337 }
76b32999 2338 nfs_fattr_init(&fattr);
cccef3b9 2339 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2340 if (!status) {
2341 entry->mask = 0;
2342 if (res.access & NFS4_ACCESS_READ)
2343 entry->mask |= MAY_READ;
2344 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2345 entry->mask |= MAY_WRITE;
2346 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2347 entry->mask |= MAY_EXEC;
76b32999 2348 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2349 }
2350 return status;
2351}
2352
2353static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2354{
2355 struct nfs4_exception exception = { };
2356 int err;
2357 do {
2358 err = nfs4_handle_exception(NFS_SERVER(inode),
2359 _nfs4_proc_access(inode, entry),
2360 &exception);
2361 } while (exception.retry);
2362 return err;
2363}
2364
2365/*
2366 * TODO: For the time being, we don't try to get any attributes
2367 * along with any of the zero-copy operations READ, READDIR,
2368 * READLINK, WRITE.
2369 *
2370 * In the case of the first three, we want to put the GETATTR
2371 * after the read-type operation -- this is because it is hard
2372 * to predict the length of a GETATTR response in v4, and thus
2373 * align the READ data correctly. This means that the GETATTR
2374 * may end up partially falling into the page cache, and we should
2375 * shift it into the 'tail' of the xdr_buf before processing.
2376 * To do this efficiently, we need to know the total length
2377 * of data received, which doesn't seem to be available outside
2378 * of the RPC layer.
2379 *
2380 * In the case of WRITE, we also want to put the GETATTR after
2381 * the operation -- in this case because we want to make sure
2382 * we get the post-operation mtime and size. This means that
2383 * we can't use xdr_encode_pages() as written: we need a variant
2384 * of it which would leave room in the 'tail' iovec.
2385 *
2386 * Both of these changes to the XDR layer would in fact be quite
2387 * minor, but I decided to leave them for a subsequent patch.
2388 */
2389static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2390 unsigned int pgbase, unsigned int pglen)
2391{
2392 struct nfs4_readlink args = {
2393 .fh = NFS_FH(inode),
2394 .pgbase = pgbase,
2395 .pglen = pglen,
2396 .pages = &page,
2397 };
f50c7000 2398 struct nfs4_readlink_res res;
1da177e4
LT		 2399 struct rpc_message msg = {
2400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2401 .rpc_argp = &args,
f50c7000 2402 .rpc_resp = &res,
1da177e4
LT		 2403 };
2404
cccef3b9 2405 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2406}
2407
2408static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2409 unsigned int pgbase, unsigned int pglen)
2410{
2411 struct nfs4_exception exception = { };
2412 int err;
2413 do {
2414 err = nfs4_handle_exception(NFS_SERVER(inode),
2415 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2416 &exception);
2417 } while (exception.retry);
2418 return err;
2419}
2420
1da177e4
LT		 2421/*
2422 * Got race?
2423 * We will need to arrange for the VFS layer to provide an atomic open.
2424 * Until then, this create/open method is prone to inefficiency and race
2425 * conditions due to the lookup, create, and open VFS calls from sys_open()
2426 * placed on the wire.
2427 *
2428 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2429 * The file will be opened again in the subsequent VFS open call
2430 * (nfs4_proc_file_open).
2431 *
2432 * The open for read will just hang around to be used by any process that
2433 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2434 */
2435
2436static int
2437nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2438 int flags, struct nameidata *nd)
1da177e4 2439{
ad389da7 2440 struct path path = {
4ac91378 2441 .mnt = nd->path.mnt,
ad389da7
TM		 2442 .dentry = dentry,
2443 };
1da177e4
LT		 2444 struct nfs4_state *state;
2445 struct rpc_cred *cred;
dc0b027d 2446 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2447 int status = 0;
2448
98a8e323 2449 cred = rpc_lookup_cred();
1da177e4
LT		 2450 if (IS_ERR(cred)) {
2451 status = PTR_ERR(cred);
2452 goto out;
2453 }
dc0b027d 2454 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2455 d_drop(dentry);
1da177e4
LT		 2456 if (IS_ERR(state)) {
2457 status = PTR_ERR(state);
659bfcd6 2458 goto out_putcred;
1da177e4 2459 }
d4d9cdcb 2460 d_add(dentry, igrab(state->inode));
d75340cc 2461 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2462 if (flags & O_EXCL) {
2463 struct nfs_fattr fattr;
659bfcd6 2464 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2465 if (status == 0)
65e4308d 2466 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2467 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2468 }
ad389da7 2469 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2470 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2471 else
dc0b027d 2472 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2473out_putcred:
2474 put_rpccred(cred);
1da177e4
LT		 2475out:
2476 return status;
2477}
2478
2479static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2480{
16e42959 2481 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2482 struct nfs_removeargs args = {
1da177e4 2483 .fh = NFS_FH(dir),
4fdc17b2
TM		 2484 .name.len = name->len,
2485 .name.name = name->name,
16e42959
TM		 2486 .bitmask = server->attr_bitmask,
2487 };
4fdc17b2 2488 struct nfs_removeres res = {
16e42959 2489 .server = server,
1da177e4 2490 };
1da177e4 2491 struct rpc_message msg = {
4fdc17b2
TM		 2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2493 .rpc_argp = &args,
2494 .rpc_resp = &res,
1da177e4
LT		 2495 };
2496 int status;
2497
4fdc17b2 2498 nfs_fattr_init(&res.dir_attr);
cccef3b9 2499 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2500 if (status == 0) {
2501 update_changeattr(dir, &res.cinfo);
4fdc17b2 2502 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2503 }
1da177e4
LT		 2504 return status;
2505}
2506
2507static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2508{
2509 struct nfs4_exception exception = { };
2510 int err;
2511 do {
2512 err = nfs4_handle_exception(NFS_SERVER(dir),
2513 _nfs4_proc_remove(dir, name),
2514 &exception);
2515 } while (exception.retry);
2516 return err;
2517}
2518
e4eff1a6 2519static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2520{
e4eff1a6
TM		 2521 struct nfs_server *server = NFS_SERVER(dir);
2522 struct nfs_removeargs *args = msg->rpc_argp;
2523 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2524
a65318bf 2525 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2526 res->server = server;
1da177e4 2527 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2528}
2529
e4eff1a6 2530static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2531{
e4eff1a6
TM		 2532 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2533
472cfbd9 2534 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2535 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2536 return 0;
2537 update_changeattr(dir, &res->cinfo);
2538 nfs_post_op_update_inode(dir, &res->dir_attr);
2539 return 1;
1da177e4
LT		 2540}
2541
2542static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2543 struct inode *new_dir, struct qstr *new_name)
2544{
6caf2c82 2545 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2546 struct nfs4_rename_arg arg = {
2547 .old_dir = NFS_FH(old_dir),
2548 .new_dir = NFS_FH(new_dir),
2549 .old_name = old_name,
2550 .new_name = new_name,
6caf2c82
TM		 2551 .bitmask = server->attr_bitmask,
2552 };
2553 struct nfs_fattr old_fattr, new_fattr;
2554 struct nfs4_rename_res res = {
2555 .server = server,
2556 .old_fattr = &old_fattr,
2557 .new_fattr = &new_fattr,
1da177e4 2558 };
1da177e4
LT		 2559 struct rpc_message msg = {
2560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2561 .rpc_argp = &arg,
2562 .rpc_resp = &res,
2563 };
2564 int status;
2565
6caf2c82
TM		 2566 nfs_fattr_init(res.old_fattr);
2567 nfs_fattr_init(res.new_fattr);
cccef3b9 2568 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2569
2570 if (!status) {
2571 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2572 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2573 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2574 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2575 }
2576 return status;
2577}
2578
2579static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2580 struct inode *new_dir, struct qstr *new_name)
2581{
2582 struct nfs4_exception exception = { };
2583 int err;
2584 do {
2585 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2586 _nfs4_proc_rename(old_dir, old_name,
2587 new_dir, new_name),
2588 &exception);
2589 } while (exception.retry);
2590 return err;
2591}
2592
2593static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2594{
91ba2eee 2595 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2596 struct nfs4_link_arg arg = {
2597 .fh = NFS_FH(inode),
2598 .dir_fh = NFS_FH(dir),
2599 .name = name,
91ba2eee
TM		 2600 .bitmask = server->attr_bitmask,
2601 };
2602 struct nfs_fattr fattr, dir_attr;
2603 struct nfs4_link_res res = {
2604 .server = server,
2605 .fattr = &fattr,
2606 .dir_attr = &dir_attr,
1da177e4 2607 };
1da177e4
LT		 2608 struct rpc_message msg = {
2609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2610 .rpc_argp = &arg,
91ba2eee 2611 .rpc_resp = &res,
1da177e4
LT		 2612 };
2613 int status;
2614
91ba2eee
TM		 2615 nfs_fattr_init(res.fattr);
2616 nfs_fattr_init(res.dir_attr);
cccef3b9 2617 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2618 if (!status) {
2619 update_changeattr(dir, &res.cinfo);
2620 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2621 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2622 }
1da177e4
LT		 2623
2624 return status;
2625}
2626
2627static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2628{
2629 struct nfs4_exception exception = { };
2630 int err;
2631 do {
2632 err = nfs4_handle_exception(NFS_SERVER(inode),
2633 _nfs4_proc_link(inode, dir, name),
2634 &exception);
2635 } while (exception.retry);
2636 return err;
2637}
2638
57dc9a57
TM		 2639struct nfs4_createdata {
2640 struct rpc_message msg;
2641 struct nfs4_create_arg arg;
2642 struct nfs4_create_res res;
2643 struct nfs_fh fh;
2644 struct nfs_fattr fattr;
2645 struct nfs_fattr dir_fattr;
2646};
2647
2648static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2649 struct qstr *name, struct iattr *sattr, u32 ftype)
2650{
2651 struct nfs4_createdata *data;
2652
2653 data = kzalloc(sizeof(*data), GFP_KERNEL);
2654 if (data != NULL) {
2655 struct nfs_server *server = NFS_SERVER(dir);
2656
2657 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2658 data->msg.rpc_argp = &data->arg;
2659 data->msg.rpc_resp = &data->res;
2660 data->arg.dir_fh = NFS_FH(dir);
2661 data->arg.server = server;
2662 data->arg.name = name;
2663 data->arg.attrs = sattr;
2664 data->arg.ftype = ftype;
2665 data->arg.bitmask = server->attr_bitmask;
2666 data->res.server = server;
2667 data->res.fh = &data->fh;
2668 data->res.fattr = &data->fattr;
2669 data->res.dir_fattr = &data->dir_fattr;
2670 nfs_fattr_init(data->res.fattr);
2671 nfs_fattr_init(data->res.dir_fattr);
2672 }
2673 return data;
2674}
2675
2676static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2677{
cccef3b9
AA		 2678 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2679 &data->arg, &data->res, 1);
57dc9a57
TM		 2680 if (status == 0) {
2681 update_changeattr(dir, &data->res.dir_cinfo);
2682 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2683 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2684 }
2685 return status;
2686}
2687
2688static void nfs4_free_createdata(struct nfs4_createdata *data)
2689{
2690 kfree(data);
2691}
2692
4f390c15 2693static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2694 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2695{
57dc9a57
TM		 2696 struct nfs4_createdata *data;
2697 int status = -ENAMETOOLONG;
1da177e4 2698
94a6d753 2699 if (len > NFS4_MAXPATHLEN)
57dc9a57 2700 goto out;
4f390c15 2701
57dc9a57
TM		 2702 status = -ENOMEM;
2703 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2704 if (data == NULL)
2705 goto out;
2706
2707 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2708 data->arg.u.symlink.pages = &page;
2709 data->arg.u.symlink.len = len;
1da177e4 2710
57dc9a57
TM		 2711 status = nfs4_do_create(dir, dentry, data);
2712
2713 nfs4_free_createdata(data);
2714out:
1da177e4
LT		 2715 return status;
2716}
2717
4f390c15 2718static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2719 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2720{
2721 struct nfs4_exception exception = { };
2722 int err;
2723 do {
2724 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2725 _nfs4_proc_symlink(dir, dentry, page,
2726 len, sattr),
1da177e4
LT		 2727 &exception);
2728 } while (exception.retry);
2729 return err;
2730}
2731
2732static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2733 struct iattr *sattr)
2734{
57dc9a57
TM		 2735 struct nfs4_createdata *data;
2736 int status = -ENOMEM;
1da177e4 2737
57dc9a57
TM		 2738 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2739 if (data == NULL)
2740 goto out;
2741
2742 status = nfs4_do_create(dir, dentry, data);
2743
2744 nfs4_free_createdata(data);
2745out:
1da177e4
LT		 2746 return status;
2747}
2748
2749static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2750 struct iattr *sattr)
2751{
2752 struct nfs4_exception exception = { };
2753 int err;
2754 do {
2755 err = nfs4_handle_exception(NFS_SERVER(dir),
2756 _nfs4_proc_mkdir(dir, dentry, sattr),
2757 &exception);
2758 } while (exception.retry);
2759 return err;
2760}
2761
2762static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2763 u64 cookie, struct page *page, unsigned int count, int plus)
2764{
2765 struct inode *dir = dentry->d_inode;
2766 struct nfs4_readdir_arg args = {
2767 .fh = NFS_FH(dir),
2768 .pages = &page,
2769 .pgbase = 0,
2770 .count = count,
96d25e53 2771 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2772 };
2773 struct nfs4_readdir_res res;
2774 struct rpc_message msg = {
2775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2776 .rpc_argp = &args,
2777 .rpc_resp = &res,
2778 .rpc_cred = cred,
2779 };
2780 int status;
2781
3110ff80 2782 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2783 dentry->d_parent->d_name.name,
2784 dentry->d_name.name,
2785 (unsigned long long)cookie);
1da177e4
LT		 2786 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2787 res.pgbase = args.pgbase;
cccef3b9 2788 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2789 if (status == 0)
2790 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2791
2792 nfs_invalidate_atime(dir);
2793
3110ff80 2794 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2795 return status;
2796}
2797
2798static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2799 u64 cookie, struct page *page, unsigned int count, int plus)
2800{
2801 struct nfs4_exception exception = { };
2802 int err;
2803 do {
2804 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2805 _nfs4_proc_readdir(dentry, cred, cookie,
2806 page, count, plus),
2807 &exception);
2808 } while (exception.retry);
2809 return err;
2810}
2811
2812static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2813 struct iattr *sattr, dev_t rdev)
2814{
57dc9a57
TM		 2815 struct nfs4_createdata *data;
2816 int mode = sattr->ia_mode;
2817 int status = -ENOMEM;
1da177e4
LT		 2818
2819 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2820 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2821
2822 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2823 if (data == NULL)
2824 goto out;
2825
1da177e4 2826 if (S_ISFIFO(mode))
57dc9a57 2827 data->arg.ftype = NF4FIFO;
1da177e4 2828 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2829 data->arg.ftype = NF4BLK;
2830 data->arg.u.device.specdata1 = MAJOR(rdev);
2831 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2832 }
2833 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2834 data->arg.ftype = NF4CHR;
2835 data->arg.u.device.specdata1 = MAJOR(rdev);
2836 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2837 }
1da177e4 2838
57dc9a57
TM		 2839 status = nfs4_do_create(dir, dentry, data);
2840
2841 nfs4_free_createdata(data);
2842out:
1da177e4
LT		 2843 return status;
2844}
2845
2846static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2847 struct iattr *sattr, dev_t rdev)
2848{
2849 struct nfs4_exception exception = { };
2850 int err;
2851 do {
2852 err = nfs4_handle_exception(NFS_SERVER(dir),
2853 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2854 &exception);
2855 } while (exception.retry);
2856 return err;
2857}
2858
2859static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2860 struct nfs_fsstat *fsstat)
2861{
2862 struct nfs4_statfs_arg args = {
2863 .fh = fhandle,
2864 .bitmask = server->attr_bitmask,
2865 };
24ad148a
BH		 2866 struct nfs4_statfs_res res = {
2867 .fsstat = fsstat,
2868 };
1da177e4
LT		 2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2871 .rpc_argp = &args,
24ad148a 2872 .rpc_resp = &res,
1da177e4
LT		 2873 };
2874
0e574af1 2875 nfs_fattr_init(fsstat->fattr);
cccef3b9 2876 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2877}
2878
2879static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2880{
2881 struct nfs4_exception exception = { };
2882 int err;
2883 do {
2884 err = nfs4_handle_exception(server,
2885 _nfs4_proc_statfs(server, fhandle, fsstat),
2886 &exception);
2887 } while (exception.retry);
2888 return err;
2889}
2890
2891static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2892 struct nfs_fsinfo *fsinfo)
2893{
2894 struct nfs4_fsinfo_arg args = {
2895 .fh = fhandle,
2896 .bitmask = server->attr_bitmask,
2897 };
3dda5e43
BH		 2898 struct nfs4_fsinfo_res res = {
2899 .fsinfo = fsinfo,
2900 };
1da177e4
LT		 2901 struct rpc_message msg = {
2902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2903 .rpc_argp = &args,
3dda5e43 2904 .rpc_resp = &res,
1da177e4
LT		 2905 };
2906
cccef3b9 2907 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2908}
2909
2910static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2911{
2912 struct nfs4_exception exception = { };
2913 int err;
2914
2915 do {
2916 err = nfs4_handle_exception(server,
2917 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2918 &exception);
2919 } while (exception.retry);
2920 return err;
2921}
2922
2923static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2924{
0e574af1 2925 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2926 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2927}
2928
2929static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_pathconf *pathconf)
2931{
2932 struct nfs4_pathconf_arg args = {
2933 .fh = fhandle,
2934 .bitmask = server->attr_bitmask,
2935 };
d45b2989
BH		 2936 struct nfs4_pathconf_res res = {
2937 .pathconf = pathconf,
2938 };
1da177e4
LT		 2939 struct rpc_message msg = {
2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2941 .rpc_argp = &args,
d45b2989 2942 .rpc_resp = &res,
1da177e4
LT		 2943 };
2944
2945 /* None of the pathconf attributes are mandatory to implement */
2946 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2947 memset(pathconf, 0, sizeof(*pathconf));
2948 return 0;
2949 }
2950
0e574af1 2951 nfs_fattr_init(pathconf->fattr);
cccef3b9 2952 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2953}
2954
2955static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_pathconf *pathconf)
2957{
2958 struct nfs4_exception exception = { };
2959 int err;
2960
2961 do {
2962 err = nfs4_handle_exception(server,
2963 _nfs4_proc_pathconf(server, fhandle, pathconf),
2964 &exception);
2965 } while (exception.retry);
2966 return err;
2967}
2968
ec06c096 2969static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2970{
ec06c096 2971 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2972
f11c88af
AA		 2973 dprintk("--> %s\n", __func__);
2974
f11c88af
AA		 2975 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2976
9e33bed5 2977 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d61e612a 2978 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2979 return -EAGAIN;
1da177e4 2980 }
8850df99
TM		 2981
2982 nfs_invalidate_atime(data->inode);
1da177e4 2983 if (task->tk_status > 0)
ec06c096
TM		 2984 renew_lease(server, data->timestamp);
2985 return 0;
1da177e4
LT		 2986}
2987
bdc7f021 2988static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2989{
1da177e4 2990 data->timestamp = jiffies;
bdc7f021 2991 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2992}
2993
788e7a89 2994static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2995{
1da177e4
LT		 2996 struct inode *inode = data->inode;
2997
def6ed7e
AA		 2998 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2999 task->tk_status);
3000
9e33bed5 3001 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d61e612a 3002 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3003 return -EAGAIN;
1da177e4 3004 }
4f9838c7 3005 if (task->tk_status >= 0) {
1da177e4 3006 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3007 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3008 }
788e7a89 3009 return 0;
1da177e4
LT		 3010}
3011
bdc7f021 3012static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3013{
bdc7f021
TM		 3014 struct nfs_server *server = NFS_SERVER(data->inode);
3015
a65318bf 3016 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3017 data->res.server = server;
1da177e4
LT		 3018 data->timestamp = jiffies;
3019
bdc7f021 3020 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3021}
3022
788e7a89 3023static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3024{
1da177e4
LT		 3025 struct inode *inode = data->inode;
3026
21d9a851
AA		 3027 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3028 task->tk_status);
9e33bed5 3029 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d61e612a 3030 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3031 return -EAGAIN;
1da177e4 3032 }
9e08a3c5 3033 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3034 return 0;
1da177e4
LT		 3035}
3036
bdc7f021 3037static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3038{
788e7a89 3039 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3040
a65318bf 3041 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3042 data->res.server = server;
bdc7f021 3043 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3044}
3045
3046/*
3047 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3048 * standalone procedure for queueing an asynchronous RENEW.
3049 */
963d8fe5 3050static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3051{
adfa6f98 3052 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3053 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3054
3055 if (task->tk_status < 0) {
95baa25c
TM		 3056 /* Unless we're shutting down, schedule state recovery! */
3057 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3058 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3059 return;
3060 }
3061 spin_lock(&clp->cl_lock);
3062 if (time_before(clp->cl_last_renewal,timestamp))
3063 clp->cl_last_renewal = timestamp;
3064 spin_unlock(&clp->cl_lock);
3065}
3066
963d8fe5
TM		 3067static const struct rpc_call_ops nfs4_renew_ops = {
3068 .rpc_call_done = nfs4_renew_done,
3069};
3070
adfa6f98 3071int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3072{
3073 struct rpc_message msg = {
3074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3075 .rpc_argp = clp,
b4454fe1 3076 .rpc_cred = cred,
1da177e4
LT		 3077 };
3078
3079 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3080 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3081}
3082
adfa6f98 3083int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3084{
3085 struct rpc_message msg = {
3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3087 .rpc_argp = clp,
b4454fe1 3088 .rpc_cred = cred,
1da177e4
LT		 3089 };
3090 unsigned long now = jiffies;
3091 int status;
3092
3093 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3094 if (status < 0)
3095 return status;
3096 spin_lock(&clp->cl_lock);
3097 if (time_before(clp->cl_last_renewal,now))
3098 clp->cl_last_renewal = now;
3099 spin_unlock(&clp->cl_lock);
3100 return 0;
3101}
3102
aa1870af
BF		 3103static inline int nfs4_server_supports_acls(struct nfs_server *server)
3104{
3105 return (server->caps & NFS_CAP_ACLS)
3106 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3107 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3108}
3109
3110/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3111 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3112 * the stack.
3113 */
3114#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3115
3116static void buf_to_pages(const void *buf, size_t buflen,
3117 struct page **pages, unsigned int *pgbase)
3118{
3119 const void *p = buf;
3120
3121 *pgbase = offset_in_page(buf);
3122 p -= *pgbase;
3123 while (p < buf + buflen) {
3124 *(pages++) = virt_to_page(p);
3125 p += PAGE_CACHE_SIZE;
3126 }
3127}
3128
e50a1c2e
BF		 3129struct nfs4_cached_acl {
3130 int cached;
3131 size_t len;
3e9d4154 3132 char data[0];
e50a1c2e
BF		 3133};
3134
3135static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3136{
3137 struct nfs_inode *nfsi = NFS_I(inode);
3138
3139 spin_lock(&inode->i_lock);
3140 kfree(nfsi->nfs4_acl);
3141 nfsi->nfs4_acl = acl;
3142 spin_unlock(&inode->i_lock);
3143}
3144
3145static void nfs4_zap_acl_attr(struct inode *inode)
3146{
3147 nfs4_set_cached_acl(inode, NULL);
3148}
3149
3150static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3151{
3152 struct nfs_inode *nfsi = NFS_I(inode);
3153 struct nfs4_cached_acl *acl;
3154 int ret = -ENOENT;
3155
3156 spin_lock(&inode->i_lock);
3157 acl = nfsi->nfs4_acl;
3158 if (acl == NULL)
3159 goto out;
3160 if (buf == NULL) /* user is just asking for length */
3161 goto out_len;
3162 if (acl->cached == 0)
3163 goto out;
3164 ret = -ERANGE; /* see getxattr(2) man page */
3165 if (acl->len > buflen)
3166 goto out;
3167 memcpy(buf, acl->data, acl->len);
3168out_len:
3169 ret = acl->len;
3170out:
3171 spin_unlock(&inode->i_lock);
3172 return ret;
3173}
3174
3175static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3176{
3177 struct nfs4_cached_acl *acl;
3178
3179 if (buf && acl_len <= PAGE_SIZE) {
3180 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3181 if (acl == NULL)
3182 goto out;
3183 acl->cached = 1;
3184 memcpy(acl->data, buf, acl_len);
3185 } else {
3186 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3187 if (acl == NULL)
3188 goto out;
3189 acl->cached = 0;
3190 }
3191 acl->len = acl_len;
3192out:
3193 nfs4_set_cached_acl(inode, acl);
3194}
3195
16b4289c 3196static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3197{
aa1870af
BF		 3198 struct page *pages[NFS4ACL_MAXPAGES];
3199 struct nfs_getaclargs args = {
3200 .fh = NFS_FH(inode),
3201 .acl_pages = pages,
3202 .acl_len = buflen,
3203 };
663c79b3
BH		 3204 struct nfs_getaclres res = {
3205 .acl_len = buflen,
3206 };
e50a1c2e 3207 void *resp_buf;
aa1870af
BF		 3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3210 .rpc_argp = &args,
663c79b3 3211 .rpc_resp = &res,
aa1870af 3212 };
e50a1c2e 3213 struct page *localpage = NULL;
aa1870af
BF		 3214 int ret;
3215
e50a1c2e
BF		 3216 if (buflen < PAGE_SIZE) {
3217 /* As long as we're doing a round trip to the server anyway,
3218 * let's be prepared for a page of acl data. */
3219 localpage = alloc_page(GFP_KERNEL);
3220 resp_buf = page_address(localpage);
3221 if (localpage == NULL)
3222 return -ENOMEM;
3223 args.acl_pages[0] = localpage;
3224 args.acl_pgbase = 0;
663c79b3 3225 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3226 } else {
3227 resp_buf = buf;
3228 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3229 }
cccef3b9 3230 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3231 if (ret)
3232 goto out_free;
663c79b3
BH		 3233 if (res.acl_len > args.acl_len)
3234 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3235 else
663c79b3 3236 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3237 if (buf) {
3238 ret = -ERANGE;
663c79b3 3239 if (res.acl_len > buflen)
e50a1c2e
BF		 3240 goto out_free;
3241 if (localpage)
663c79b3 3242 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3243 }
663c79b3 3244 ret = res.acl_len;
e50a1c2e
BF		 3245out_free:
3246 if (localpage)
3247 __free_page(localpage);
aa1870af
BF		 3248 return ret;
3249}
3250
16b4289c
TM		 3251static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3252{
3253 struct nfs4_exception exception = { };
3254 ssize_t ret;
3255 do {
3256 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3257 if (ret >= 0)
3258 break;
3259 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3260 } while (exception.retry);
3261 return ret;
3262}
3263
e50a1c2e
BF		 3264static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3265{
3266 struct nfs_server *server = NFS_SERVER(inode);
3267 int ret;
3268
3269 if (!nfs4_server_supports_acls(server))
3270 return -EOPNOTSUPP;
3271 ret = nfs_revalidate_inode(server, inode);
3272 if (ret < 0)
3273 return ret;
3274 ret = nfs4_read_cached_acl(inode, buf, buflen);
3275 if (ret != -ENOENT)
3276 return ret;
3277 return nfs4_get_acl_uncached(inode, buf, buflen);
3278}
3279
16b4289c 3280static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3281{
3282 struct nfs_server *server = NFS_SERVER(inode);
3283 struct page *pages[NFS4ACL_MAXPAGES];
3284 struct nfs_setaclargs arg = {
3285 .fh = NFS_FH(inode),
3286 .acl_pages = pages,
3287 .acl_len = buflen,
3288 };
73c403a9 3289 struct nfs_setaclres res;
4b580ee3
BF		 3290 struct rpc_message msg = {
3291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3292 .rpc_argp = &arg,
73c403a9 3293 .rpc_resp = &res,
4b580ee3
BF		 3294 };
3295 int ret;
3296
3297 if (!nfs4_server_supports_acls(server))
3298 return -EOPNOTSUPP;
642ac549 3299 nfs_inode_return_delegation(inode);
4b580ee3 3300 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3301 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3302 nfs_access_zap_cache(inode);
3303 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3304 return ret;
3305}
3306
16b4289c
TM		 3307static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3308{
3309 struct nfs4_exception exception = { };
3310 int err;
3311 do {
3312 err = nfs4_handle_exception(NFS_SERVER(inode),
3313 __nfs4_proc_set_acl(inode, buf, buflen),
3314 &exception);
3315 } while (exception.retry);
3316 return err;
3317}
3318
1da177e4 3319static int
8328d59f 3320_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3321{
1da177e4
LT		 3322 if (!clp || task->tk_status >= 0)
3323 return 0;
3324 switch(task->tk_status) {
9e33bed5
TM		 3325 case -NFS4ERR_ADMIN_REVOKED:
3326 case -NFS4ERR_BAD_STATEID:
3327 case -NFS4ERR_OPENMODE:
3328 if (state == NULL)
3329 break;
3330 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3331 case -NFS4ERR_STALE_CLIENTID:
3332 case -NFS4ERR_STALE_STATEID:
3333 case -NFS4ERR_EXPIRED:
5d00837b 3334 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3335 nfs4_schedule_state_recovery(clp);
e005e804 3336 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3337 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3338 task->tk_status = 0;
3339 return -EAGAIN;
4745e315
AA		 3340#if defined(CONFIG_NFS_V4_1)
3341 case -NFS4ERR_BADSESSION:
3342 case -NFS4ERR_BADSLOT:
3343 case -NFS4ERR_BAD_HIGH_SLOT:
3344 case -NFS4ERR_DEADSESSION:
3345 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3346 case -NFS4ERR_SEQ_FALSE_RETRY:
3347 case -NFS4ERR_SEQ_MISORDERED:
3348 dprintk("%s ERROR %d, Reset session\n", __func__,
3349 task->tk_status);
0b9e2d41 3350 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3351 task->tk_status = 0;
3352 return -EAGAIN;
3353#endif /* CONFIG_NFS_V4_1 */
1da177e4 3354 case -NFS4ERR_DELAY:
8328d59f
AA		 3355 if (server)
3356 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3357 case -NFS4ERR_GRACE:
1da177e4
LT		 3358 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3359 task->tk_status = 0;
3360 return -EAGAIN;
3361 case -NFS4ERR_OLD_STATEID:
3362 task->tk_status = 0;
3363 return -EAGAIN;
3364 }
3365 task->tk_status = nfs4_map_errors(task->tk_status);
3366 return 0;
3367}
3368
8328d59f
AA		 3369static int
3370nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3371{
3372 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3373}
3374
adfa6f98 3375int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3376{
3377 nfs4_verifier sc_verifier;
3378 struct nfs4_setclientid setclientid = {
3379 .sc_verifier = &sc_verifier,
3380 .sc_prog = program,
3381 };
3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3384 .rpc_argp = &setclientid,
3385 .rpc_resp = clp,
286d7d6a 3386 .rpc_cred = cred,
1da177e4 3387 };
bc4785cd 3388 __be32 *p;
1da177e4
LT		 3389 int loop = 0;
3390 int status;
3391
bc4785cd 3392 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3393 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3394 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3395
3396 for(;;) {
3397 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3398 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3399 clp->cl_ipaddr,
3400 rpc_peeraddr2str(clp->cl_rpcclient,
3401 RPC_DISPLAY_ADDR),
69dd716c
TM		 3402 rpc_peeraddr2str(clp->cl_rpcclient,
3403 RPC_DISPLAY_PROTO),
78ea323b 3404 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3405 clp->cl_id_uniquifier);
3406 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3407 sizeof(setclientid.sc_netid),
3408 rpc_peeraddr2str(clp->cl_rpcclient,
3409 RPC_DISPLAY_NETID));
1da177e4 3410 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3411 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3412 clp->cl_ipaddr, port >> 8, port & 255);
3413
3414 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3415 if (status != -NFS4ERR_CLID_INUSE)
3416 break;
3417 if (signalled())
3418 break;
3419 if (loop++ & 1)
3420 ssleep(clp->cl_lease_time + 1);
3421 else
3422 if (++clp->cl_id_uniquifier == 0)
3423 break;
3424 }
3425 return status;
3426}
3427
adfa6f98 3428static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3429{
3430 struct nfs_fsinfo fsinfo;
3431 struct rpc_message msg = {
3432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3433 .rpc_argp = clp,
3434 .rpc_resp = &fsinfo,
286d7d6a 3435 .rpc_cred = cred,
1da177e4
LT		 3436 };
3437 unsigned long now;
3438 int status;
3439
3440 now = jiffies;
3441 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3442 if (status == 0) {
3443 spin_lock(&clp->cl_lock);
3444 clp->cl_lease_time = fsinfo.lease_time * HZ;
3445 clp->cl_last_renewal = now;
3446 spin_unlock(&clp->cl_lock);
3447 }
3448 return status;
3449}
3450
adfa6f98 3451int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3452{
77e03677 3453 long timeout = 0;
51581f3b
TM		 3454 int err;
3455 do {
3456 err = _nfs4_proc_setclientid_confirm(clp, cred);
3457 switch (err) {
3458 case 0:
3459 return err;
3460 case -NFS4ERR_RESOURCE:
3461 /* The IBM lawyers misread another document! */
3462 case -NFS4ERR_DELAY:
3463 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3464 }
3465 } while (err == 0);
3466 return err;
3467}
3468
fe650407
TM		 3469struct nfs4_delegreturndata {
3470 struct nfs4_delegreturnargs args;
fa178f29 3471 struct nfs4_delegreturnres res;
fe650407
TM		 3472 struct nfs_fh fh;
3473 nfs4_stateid stateid;
26e976a8 3474 unsigned long timestamp;
fa178f29 3475 struct nfs_fattr fattr;
fe650407
TM		 3476 int rpc_status;
3477};
3478
fe650407
TM		 3479static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3480{
3481 struct nfs4_delegreturndata *data = calldata;
938e1010 3482
d61e612a
TM		 3483 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3484 task->tk_status);
938e1010 3485
fe650407 3486 data->rpc_status = task->tk_status;
26e976a8 3487 if (data->rpc_status == 0)
fa178f29 3488 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3489}
3490
3491static void nfs4_delegreturn_release(void *calldata)
3492{
fe650407
TM		 3493 kfree(calldata);
3494}
3495
938e1010
AA		 3496#if defined(CONFIG_NFS_V4_1)
3497static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3498{
3499 struct nfs4_delegreturndata *d_data;
3500
3501 d_data = (struct nfs4_delegreturndata *)data;
3502
3503 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3504 &d_data->args.seq_args,
3505 &d_data->res.seq_res, 1, task))
3506 return;
3507 rpc_call_start(task);
3508}
3509#endif /* CONFIG_NFS_V4_1 */
3510
c8d149f3 3511static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3512#if defined(CONFIG_NFS_V4_1)
3513 .rpc_call_prepare = nfs4_delegreturn_prepare,
3514#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3515 .rpc_call_done = nfs4_delegreturn_done,
3516 .rpc_release = nfs4_delegreturn_release,
3517};
3518
e6f81075 3519static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3520{
3521 struct nfs4_delegreturndata *data;
fa178f29 3522 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3523 struct rpc_task *task;
5138fde0
TM		 3524 struct rpc_message msg = {
3525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3526 .rpc_cred = cred,
3527 };
c970aa85
TM		 3528 struct rpc_task_setup task_setup_data = {
3529 .rpc_client = server->client,
5138fde0 3530 .rpc_message = &msg,
c970aa85
TM		 3531 .callback_ops = &nfs4_delegreturn_ops,
3532 .flags = RPC_TASK_ASYNC,
3533 };
e6f81075 3534 int status = 0;
fe650407 3535
938e1010 3536 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3537 if (data == NULL)
3538 return -ENOMEM;
3539 data->args.fhandle = &data->fh;
3540 data->args.stateid = &data->stateid;
fa178f29 3541 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3542 nfs_copy_fh(&data->fh, NFS_FH(inode));
3543 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3544 data->res.fattr = &data->fattr;
3545 data->res.server = server;
5f7dbd5c 3546 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3547 nfs_fattr_init(data->res.fattr);
26e976a8 3548 data->timestamp = jiffies;
fe650407
TM		 3549 data->rpc_status = 0;
3550
c970aa85 3551 task_setup_data.callback_data = data;
5138fde0
TM		 3552 msg.rpc_argp = &data->args,
3553 msg.rpc_resp = &data->res,
c970aa85 3554 task = rpc_run_task(&task_setup_data);
7a1218a2 3555 if (IS_ERR(task))
fe650407 3556 return PTR_ERR(task);
e6f81075
TM		 3557 if (!issync)
3558 goto out;
fe650407 3559 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3560 if (status != 0)
3561 goto out;
3562 status = data->rpc_status;
3563 if (status != 0)
3564 goto out;
3565 nfs_refresh_inode(inode, &data->fattr);
3566out:
e6b3c4db 3567 rpc_put_task(task);
fe650407 3568 return status;
1da177e4
LT		 3569}
3570
e6f81075 3571int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3572{
3573 struct nfs_server *server = NFS_SERVER(inode);
3574 struct nfs4_exception exception = { };
3575 int err;
3576 do {
e6f81075 3577 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3578 switch (err) {
3579 case -NFS4ERR_STALE_STATEID:
3580 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3581 case 0:
3582 return 0;
3583 }
3584 err = nfs4_handle_exception(server, err, &exception);
3585 } while (exception.retry);
3586 return err;
3587}
3588
3589#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3590#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3591
3592/*
3593 * sleep, with exponential backoff, and retry the LOCK operation.
3594 */
3595static unsigned long
3596nfs4_set_lock_task_retry(unsigned long timeout)
3597{
150030b7 3598 schedule_timeout_killable(timeout);
1da177e4
LT		 3599 timeout <<= 1;
3600 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3601 return NFS4_LOCK_MAXTIMEOUT;
3602 return timeout;
3603}
3604
1da177e4
LT		 3605static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3606{
3607 struct inode *inode = state->inode;
3608 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3609 struct nfs_client *clp = server->nfs_client;
911d1aaf 3610 struct nfs_lockt_args arg = {
1da177e4 3611 .fh = NFS_FH(inode),
911d1aaf 3612 .fl = request,
1da177e4 3613 };
911d1aaf
TM		 3614 struct nfs_lockt_res res = {
3615 .denied = request,
1da177e4
LT		 3616 };
3617 struct rpc_message msg = {
3618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3619 .rpc_argp = &arg,
3620 .rpc_resp = &res,
3621 .rpc_cred = state->owner->so_cred,
3622 };
1da177e4
LT		 3623 struct nfs4_lock_state *lsp;
3624 int status;
3625
911d1aaf 3626 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3627 status = nfs4_set_lock_state(state, request);
3628 if (status != 0)
3629 goto out;
3630 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3631 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3632 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3633 switch (status) {
3634 case 0:
3635 request->fl_type = F_UNLCK;
3636 break;
3637 case -NFS4ERR_DENIED:
3638 status = 0;
1da177e4 3639 }
70cc6487 3640 request->fl_ops->fl_release_private(request);
8d0a8a9d 3641out:
1da177e4
LT		 3642 return status;
3643}
3644
3645static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3646{
3647 struct nfs4_exception exception = { };
3648 int err;
3649
3650 do {
3651 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3652 _nfs4_proc_getlk(state, cmd, request),
3653 &exception);
3654 } while (exception.retry);
3655 return err;
3656}
3657
3658static int do_vfs_lock(struct file *file, struct file_lock *fl)
3659{
3660 int res = 0;
3661 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3662 case FL_POSIX:
3663 res = posix_lock_file_wait(file, fl);
3664 break;
3665 case FL_FLOCK:
3666 res = flock_lock_file_wait(file, fl);
3667 break;
3668 default:
3669 BUG();
3670 }
1da177e4
LT		 3671 return res;
3672}
3673
faf5f49c 3674struct nfs4_unlockdata {
911d1aaf
TM		 3675 struct nfs_locku_args arg;
3676 struct nfs_locku_res res;
faf5f49c
TM		 3677 struct nfs4_lock_state *lsp;
3678 struct nfs_open_context *ctx;
911d1aaf
TM		 3679 struct file_lock fl;
3680 const struct nfs_server *server;
26e976a8 3681 unsigned long timestamp;
faf5f49c
TM		 3682};
3683
911d1aaf
TM		 3684static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3685 struct nfs_open_context *ctx,
3686 struct nfs4_lock_state *lsp,
3687 struct nfs_seqid *seqid)
3688{
3689 struct nfs4_unlockdata *p;
3690 struct inode *inode = lsp->ls_state->inode;
3691
a893693c 3692 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3693 if (p == NULL)
3694 return NULL;
3695 p->arg.fh = NFS_FH(inode);
3696 p->arg.fl = &p->fl;
3697 p->arg.seqid = seqid;
c1d51931 3698 p->res.seqid = seqid;
5f7dbd5c 3699 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3700 p->arg.stateid = &lsp->ls_stateid;
3701 p->lsp = lsp;
3702 atomic_inc(&lsp->ls_count);
3703 /* Ensure we don't close file until we're done freeing locks! */
3704 p->ctx = get_nfs_open_context(ctx);
3705 memcpy(&p->fl, fl, sizeof(p->fl));
3706 p->server = NFS_SERVER(inode);
3707 return p;
3708}
3709
06f814a3 3710static void nfs4_locku_release_calldata(void *data)
faf5f49c 3711{
963d8fe5 3712 struct nfs4_unlockdata *calldata = data;
911d1aaf 3713 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3714 nfs4_put_lock_state(calldata->lsp);
3715 put_nfs_open_context(calldata->ctx);
3716 kfree(calldata);
faf5f49c
TM		 3717}
3718
963d8fe5 3719static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3720{
963d8fe5 3721 struct nfs4_unlockdata *calldata = data;
faf5f49c 3722
a893693c
AA		 3723 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3724 task->tk_status);
06f814a3
TM		 3725 if (RPC_ASSASSINATED(task))
3726 return;
faf5f49c
TM		 3727 switch (task->tk_status) {
3728 case 0:
3729 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3730 calldata->res.stateid.data,
faf5f49c 3731 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3732 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3733 break;
9e33bed5
TM		 3734 case -NFS4ERR_BAD_STATEID:
3735 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3736 case -NFS4ERR_STALE_STATEID:
3737 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3738 break;
3739 default:
9e33bed5 3740 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e 3741 nfs4_restart_rpc(task,
d61e612a 3742 calldata->server->nfs_client);
faf5f49c 3743 }
faf5f49c
TM		 3744}
3745
4ce70ada 3746static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3747{
4ce70ada 3748 struct nfs4_unlockdata *calldata = data;
faf5f49c 3749
911d1aaf 3750 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3751 return;
3752 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3753 /* Note: exit _without_ running nfs4_locku_done */
3754 task->tk_action = NULL;
faf5f49c
TM		 3755 return;
3756 }
26e976a8 3757 calldata->timestamp = jiffies;
a893693c
AA		 3758 if (nfs4_setup_sequence(calldata->server->nfs_client,
3759 &calldata->arg.seq_args,
3760 &calldata->res.seq_res, 1, task))
3761 return;
5138fde0 3762 rpc_call_start(task);
faf5f49c
TM		 3763}
3764
963d8fe5 3765static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3766 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3767 .rpc_call_done = nfs4_locku_done,
06f814a3 3768 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3769};
3770
a5d16a4d
TM		 3771static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3772 struct nfs_open_context *ctx,
3773 struct nfs4_lock_state *lsp,
3774 struct nfs_seqid *seqid)
3775{
3776 struct nfs4_unlockdata *data;
5138fde0
TM		 3777 struct rpc_message msg = {
3778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3779 .rpc_cred = ctx->cred,
3780 };
c970aa85
TM		 3781 struct rpc_task_setup task_setup_data = {
3782 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3783 .rpc_message = &msg,
c970aa85 3784 .callback_ops = &nfs4_locku_ops,
101070ca 3785 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3786 .flags = RPC_TASK_ASYNC,
3787 };
a5d16a4d 3788
137d6aca
FF		 3789 /* Ensure this is an unlock - when canceling a lock, the
3790 * canceled lock is passed in, and it won't be an unlock.
3791 */
3792 fl->fl_type = F_UNLCK;
3793
a5d16a4d
TM		 3794 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3795 if (data == NULL) {
3796 nfs_free_seqid(seqid);
3797 return ERR_PTR(-ENOMEM);
3798 }
3799
5138fde0
TM		 3800 msg.rpc_argp = &data->arg,
3801 msg.rpc_resp = &data->res,
c970aa85
TM		 3802 task_setup_data.callback_data = data;
3803 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3804}
3805
faf5f49c
TM		 3806static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3807{
19e03c57 3808 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3809 struct nfs_seqid *seqid;
1da177e4 3810 struct nfs4_lock_state *lsp;
06f814a3
TM		 3811 struct rpc_task *task;
3812 int status = 0;
536ff0f8 3813 unsigned char fl_flags = request->fl_flags;
faf5f49c 3814
8d0a8a9d 3815 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3816 /* Unlock _before_ we do the RPC call */
3817 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3818 down_read(&nfsi->rwsem);
3819 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3820 up_read(&nfsi->rwsem);
9b073574 3821 goto out;
19e03c57
TM		 3822 }
3823 up_read(&nfsi->rwsem);
8d0a8a9d 3824 if (status != 0)
9b073574
TM		 3825 goto out;
3826 /* Is this a delegated lock? */
3827 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3828 goto out;
8d0a8a9d 3829 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3830 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3831 status = -ENOMEM;
911d1aaf 3832 if (seqid == NULL)
9b073574 3833 goto out;
cd3758e3 3834 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3835 status = PTR_ERR(task);
3836 if (IS_ERR(task))
9b073574 3837 goto out;
a5d16a4d 3838 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3839 rpc_put_task(task);
9b073574 3840out:
536ff0f8 3841 request->fl_flags = fl_flags;
1da177e4
LT		 3842 return status;
3843}
3844
a5d16a4d
TM		 3845struct nfs4_lockdata {
3846 struct nfs_lock_args arg;
3847 struct nfs_lock_res res;
3848 struct nfs4_lock_state *lsp;
3849 struct nfs_open_context *ctx;
3850 struct file_lock fl;
26e976a8 3851 unsigned long timestamp;
a5d16a4d
TM		 3852 int rpc_status;
3853 int cancelled;
66179efe 3854 struct nfs_server *server;
a5d16a4d
TM		 3855};
3856
3857static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3858 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3859{
a5d16a4d
TM		 3860 struct nfs4_lockdata *p;
3861 struct inode *inode = lsp->ls_state->inode;
1da177e4 3862 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3863
3864 p = kzalloc(sizeof(*p), GFP_KERNEL);
3865 if (p == NULL)
3866 return NULL;
3867
3868 p->arg.fh = NFS_FH(inode);
3869 p->arg.fl = &p->fl;
2f74c0a0
TM		 3870 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3871 if (p->arg.open_seqid == NULL)
3872 goto out_free;
a5d16a4d
TM		 3873 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3874 if (p->arg.lock_seqid == NULL)
2f74c0a0 3875 goto out_free_seqid;
a5d16a4d 3876 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3877 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3878 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3879 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3880 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3881 p->lsp = lsp;
66179efe 3882 p->server = server;
a5d16a4d
TM		 3883 atomic_inc(&lsp->ls_count);
3884 p->ctx = get_nfs_open_context(ctx);
3885 memcpy(&p->fl, fl, sizeof(p->fl));
3886 return p;
2f74c0a0
TM		 3887out_free_seqid:
3888 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3889out_free:
3890 kfree(p);
3891 return NULL;
3892}
3893
3894static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3895{
3896 struct nfs4_lockdata *data = calldata;
3897 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3898
3110ff80 3899 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3900 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3901 return;
a5d16a4d
TM		 3902 /* Do we need to do an open_to_lock_owner? */
3903 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3904 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3905 return;
a5d16a4d
TM		 3906 data->arg.open_stateid = &state->stateid;
3907 data->arg.new_lock_owner = 1;
c1d51931 3908 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3909 } else
3910 data->arg.new_lock_owner = 0;
26e976a8 3911 data->timestamp = jiffies;
66179efe
AA		 3912 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3913 &data->res.seq_res, 1, task))
3914 return;
5138fde0 3915 rpc_call_start(task);
3110ff80 3916 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3917}
3918
3919static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3920{
3921 struct nfs4_lockdata *data = calldata;
3922
3110ff80 3923 dprintk("%s: begin!\n", __func__);
a5d16a4d 3924
d61e612a
TM		 3925 nfs4_sequence_done(data->server, &data->res.seq_res,
3926 task->tk_status);
66179efe 3927
a5d16a4d
TM		 3928 data->rpc_status = task->tk_status;
3929 if (RPC_ASSASSINATED(task))
3930 goto out;
3931 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3932 if (data->rpc_status == 0)
3933 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3934 else
3935 goto out;
3936 }
3937 if (data->rpc_status == 0) {
3938 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3939 sizeof(data->lsp->ls_stateid.data));
3940 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3941 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3942 }
a5d16a4d 3943out:
3110ff80 3944 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3945}
3946
3947static void nfs4_lock_release(void *calldata)
3948{
3949 struct nfs4_lockdata *data = calldata;
3950
3110ff80 3951 dprintk("%s: begin!\n", __func__);
2f74c0a0 3952 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3953 if (data->cancelled != 0) {
3954 struct rpc_task *task;
3955 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3956 data->arg.lock_seqid);
3957 if (!IS_ERR(task))
e6b3c4db 3958 rpc_put_task(task);
3110ff80 3959 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3960 } else
3961 nfs_free_seqid(data->arg.lock_seqid);
3962 nfs4_put_lock_state(data->lsp);
3963 put_nfs_open_context(data->ctx);
3964 kfree(data);
3110ff80 3965 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3966}
3967
3968static const struct rpc_call_ops nfs4_lock_ops = {
3969 .rpc_call_prepare = nfs4_lock_prepare,
3970 .rpc_call_done = nfs4_lock_done,
3971 .rpc_release = nfs4_lock_release,
3972};
3973
3974static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3975{
3976 struct nfs4_lockdata *data;
3977 struct rpc_task *task;
5138fde0
TM		 3978 struct rpc_message msg = {
3979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3980 .rpc_cred = state->owner->so_cred,
3981 };
c970aa85
TM		 3982 struct rpc_task_setup task_setup_data = {
3983 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3984 .rpc_message = &msg,
c970aa85 3985 .callback_ops = &nfs4_lock_ops,
101070ca 3986 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3987 .flags = RPC_TASK_ASYNC,
3988 };
a5d16a4d
TM		 3989 int ret;
3990
3110ff80 3991 dprintk("%s: begin!\n", __func__);
cd3758e3 3992 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3993 fl->fl_u.nfs4_fl.owner);
3994 if (data == NULL)
3995 return -ENOMEM;
3996 if (IS_SETLKW(cmd))
3997 data->arg.block = 1;
3998 if (reclaim != 0)
3999 data->arg.reclaim = 1;
5138fde0
TM		 4000 msg.rpc_argp = &data->arg,
4001 msg.rpc_resp = &data->res,
c970aa85
TM		 4002 task_setup_data.callback_data = data;
4003 task = rpc_run_task(&task_setup_data);
7a1218a2 4004 if (IS_ERR(task))
a5d16a4d 4005 return PTR_ERR(task);
a5d16a4d
TM		 4006 ret = nfs4_wait_for_completion_rpc_task(task);
4007 if (ret == 0) {
4008 ret = data->rpc_status;
a5d16a4d
TM		 4009 } else
4010 data->cancelled = 1;
e6b3c4db 4011 rpc_put_task(task);
3110ff80 4012 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4013 return ret;
1da177e4
LT		 4014}
4015
4016static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4017{
202b50dc
TM		 4018 struct nfs_server *server = NFS_SERVER(state->inode);
4019 struct nfs4_exception exception = { };
4020 int err;
4021
4022 do {
42a2d13e
TM		 4023 /* Cache the lock if possible... */
4024 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4025 return 0;
202b50dc
TM		 4026 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4027 if (err != -NFS4ERR_DELAY)
4028 break;
4029 nfs4_handle_exception(server, err, &exception);
4030 } while (exception.retry);
4031 return err;
1da177e4
LT		 4032}
4033
4034static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4035{
202b50dc
TM		 4036 struct nfs_server *server = NFS_SERVER(state->inode);
4037 struct nfs4_exception exception = { };
4038 int err;
4039
6bfc93ef
TM		 4040 err = nfs4_set_lock_state(state, request);
4041 if (err != 0)
4042 return err;
202b50dc 4043 do {
42a2d13e
TM		 4044 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4045 return 0;
202b50dc 4046 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
a9ed2e25
TM		 4047 switch (err) {
4048 default:
4049 goto out;
4050 case -NFS4ERR_GRACE:
4051 case -NFS4ERR_DELAY:
4052 nfs4_handle_exception(server, err, &exception);
4053 err = 0;
4054 }
202b50dc 4055 } while (exception.retry);
a9ed2e25 4056out:
202b50dc 4057 return err;
1da177e4
LT		 4058}
4059
4060static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4061{
19e03c57 4062 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4063 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4064 int status;
4065
6bfc93ef 4066 /* Is this a delegated open? */
6bfc93ef
TM		 4067 status = nfs4_set_lock_state(state, request);
4068 if (status != 0)
4069 goto out;
01c3b861
TM		 4070 request->fl_flags |= FL_ACCESS;
4071 status = do_vfs_lock(request->fl_file, request);
4072 if (status < 0)
4073 goto out;
19e03c57 4074 down_read(&nfsi->rwsem);
01c3b861 4075 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4076 /* Yes: cache locks! */
01c3b861 4077 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4078 request->fl_flags = fl_flags & ~FL_SLEEP;
4079 status = do_vfs_lock(request->fl_file, request);
4080 goto out_unlock;
01c3b861 4081 }
6bfc93ef
TM		 4082 status = _nfs4_do_setlk(state, cmd, request, 0);
4083 if (status != 0)
01c3b861 4084 goto out_unlock;
6bfc93ef 4085 /* Note: we always want to sleep here! */
01c3b861 4086 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4087 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4088 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4089out_unlock:
19e03c57 4090 up_read(&nfsi->rwsem);
01c3b861
TM		 4091out:
4092 request->fl_flags = fl_flags;
1da177e4
LT		 4093 return status;
4094}
4095
4096static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4097{
4098 struct nfs4_exception exception = { };
4099 int err;
4100
4101 do {
965b5d67
TM		 4102 err = _nfs4_proc_setlk(state, cmd, request);
4103 if (err == -NFS4ERR_DENIED)
4104 err = -EAGAIN;
1da177e4 4105 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4106 err, &exception);
1da177e4
LT		 4107 } while (exception.retry);
4108 return err;
4109}
4110
4111static int
4112nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4113{
4114 struct nfs_open_context *ctx;
4115 struct nfs4_state *state;
4116 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4117 int status;
4118
4119 /* verify open state */
cd3758e3 4120 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4121 state = ctx->state;
4122
4123 if (request->fl_start < 0 || request->fl_end < 0)
4124 return -EINVAL;
4125
d953126a
TM		 4126 if (IS_GETLK(cmd)) {
4127 if (state != NULL)
4128 return nfs4_proc_getlk(state, F_GETLK, request);
4129 return 0;
4130 }
1da177e4
LT		 4131
4132 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4133 return -EINVAL;
4134
d953126a
TM		 4135 if (request->fl_type == F_UNLCK) {
4136 if (state != NULL)
4137 return nfs4_proc_unlck(state, cmd, request);
4138 return 0;
4139 }
1da177e4 4140
d953126a
TM		 4141 if (state == NULL)
4142 return -ENOLCK;
1da177e4
LT		 4143 do {
4144 status = nfs4_proc_setlk(state, cmd, request);
4145 if ((status != -EAGAIN) || IS_SETLK(cmd))
4146 break;
4147 timeout = nfs4_set_lock_task_retry(timeout);
4148 status = -ERESTARTSYS;
4149 if (signalled())
4150 break;
4151 } while(status < 0);
1da177e4
LT		 4152 return status;
4153}
4154
888e694c
TM		 4155int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4156{
4157 struct nfs_server *server = NFS_SERVER(state->inode);
4158 struct nfs4_exception exception = { };
4159 int err;
4160
4161 err = nfs4_set_lock_state(state, fl);
4162 if (err != 0)
4163 goto out;
4164 do {
4165 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4166 switch (err) {
4167 default:
4168 printk(KERN_ERR "%s: unhandled error %d.\n",
4169 __func__, err);
4170 case 0:
965b5d67 4171 case -ESTALE:
d5122201
TM		 4172 goto out;
4173 case -NFS4ERR_EXPIRED:
4174 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4175 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4176 nfs4_schedule_state_recovery(server->nfs_client);
4177 goto out;
965b5d67
TM		 4178 case -ERESTARTSYS:
4179 /*
4180 * The show must go on: exit, but mark the
4181 * stateid as needing recovery.
4182 */
4183 case -NFS4ERR_ADMIN_REVOKED:
4184 case -NFS4ERR_BAD_STATEID:
4185 case -NFS4ERR_OPENMODE:
4186 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4187 err = 0;
4188 goto out;
4189 case -ENOMEM:
4190 case -NFS4ERR_DENIED:
4191 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4192 err = 0;
4193 goto out;
d5122201
TM		 4194 case -NFS4ERR_DELAY:
4195 break;
4196 }
888e694c
TM		 4197 err = nfs4_handle_exception(server, err, &exception);
4198 } while (exception.retry);
4199out:
4200 return err;
4201}
6b3b5496 4202
aa1870af
BF		 4203#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4204
6b3b5496
BF		 4205int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4206 size_t buflen, int flags)
4207{
4b580ee3
BF		 4208 struct inode *inode = dentry->d_inode;
4209
4210 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4211 return -EOPNOTSUPP;
4212
4b580ee3 4213 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4214}
4215
4216/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4217 * and that's what we'll do for e.g. user attributes that haven't been set.
4218 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4219 * attributes in kernel-managed attribute namespaces. */
4220ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4221 size_t buflen)
4222{
aa1870af
BF		 4223 struct inode *inode = dentry->d_inode;
4224
4225 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4226 return -EOPNOTSUPP;
4227
4228 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4229}
4230
4231ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4232{
aa1870af 4233 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4234
096455a2
BF		 4235 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4236 return 0;
6b3b5496
BF		 4237 if (buf && buflen < len)
4238 return -ERANGE;
4239 if (buf)
aa1870af
BF		 4240 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4241 return len;
6b3b5496
BF		 4242}
4243
69aaaae1
TM		 4244static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4245{
4246 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4247 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4248 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4249 return;
4250
4251 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4252 NFS_ATTR_FATTR_NLINK;
4253 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4254 fattr->nlink = 2;
4255}
4256
56659e99 4257int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4258 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4259{
4260 struct nfs_server *server = NFS_SERVER(dir);
4261 u32 bitmask[2] = {
361e624f
MN		 4262 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4263 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4264 };
4265 struct nfs4_fs_locations_arg args = {
4266 .dir_fh = NFS_FH(dir),
c228fd3a 4267 .name = name,
683b57b4
TM		 4268 .page = page,
4269 .bitmask = bitmask,
4270 };
22958463
BH		 4271 struct nfs4_fs_locations_res res = {
4272 .fs_locations = fs_locations,
4273 };
683b57b4
TM		 4274 struct rpc_message msg = {
4275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4276 .rpc_argp = &args,
22958463 4277 .rpc_resp = &res,
683b57b4
TM		 4278 };
4279 int status;
4280
3110ff80 4281 dprintk("%s: start\n", __func__);
c228fd3a 4282 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4283 fs_locations->server = server;
830b8e33 4284 fs_locations->nlocations = 0;
cccef3b9 4285 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4286 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4287 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4288 return status;
4289}
4290
557134a3 4291#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4292/*
4293 * nfs4_proc_exchange_id()
4294 *
4295 * Since the clientid has expired, all compounds using sessions
4296 * associated with the stale clientid will be returning
4297 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4298 * be in some phase of session reset.
4299 */
4d643d1d 4300int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4301{
4302 nfs4_verifier verifier;
4303 struct nfs41_exchange_id_args args = {
4304 .client = clp,
4305 .flags = clp->cl_exchange_flags,
4306 };
4307 struct nfs41_exchange_id_res res = {
4308 .client = clp,
4309 };
4310 int status;
4311 struct rpc_message msg = {
4312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4313 .rpc_argp = &args,
4314 .rpc_resp = &res,
4315 .rpc_cred = cred,
4316 };
4317 __be32 *p;
4318
4319 dprintk("--> %s\n", __func__);
4320 BUG_ON(clp == NULL);
a7b72103 4321
7b183d0d
AB		 4322 /* Remove server-only flags */
4323 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4324
99fe60d0
BH		 4325 p = (u32 *)verifier.data;
4326 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4327 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4328 args.verifier = &verifier;
4329
4330 while (1) {
4331 args.id_len = scnprintf(args.id, sizeof(args.id),
4332 "%s/%s %u",
4333 clp->cl_ipaddr,
4334 rpc_peeraddr2str(clp->cl_rpcclient,
4335 RPC_DISPLAY_ADDR),
4336 clp->cl_id_uniquifier);
4337
4338 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4339
4340 if (status != NFS4ERR_CLID_INUSE)
4341 break;
4342
4343 if (signalled())
4344 break;
4345
4346 if (++clp->cl_id_uniquifier == 0)
4347 break;
4348 }
4349
4350 dprintk("<-- %s status= %d\n", __func__, status);
4351 return status;
4352}
4353
2050f0cc
AA		 4354struct nfs4_get_lease_time_data {
4355 struct nfs4_get_lease_time_args *args;
4356 struct nfs4_get_lease_time_res *res;
4357 struct nfs_client *clp;
4358};
4359
4360static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4361 void *calldata)
4362{
4363 int ret;
4364 struct nfs4_get_lease_time_data *data =
4365 (struct nfs4_get_lease_time_data *)calldata;
4366
4367 dprintk("--> %s\n", __func__);
4368 /* just setup sequence, do not trigger session recovery
4369 since we're invoked within one */
4370 ret = nfs41_setup_sequence(data->clp->cl_session,
4371 &data->args->la_seq_args,
4372 &data->res->lr_seq_res, 0, task);
4373
4374 BUG_ON(ret == -EAGAIN);
4375 rpc_call_start(task);
4376 dprintk("<-- %s\n", __func__);
4377}
4378
4379/*
4380 * Called from nfs4_state_manager thread for session setup, so don't recover
4381 * from sequence operation or clientid errors.
4382 */
4383static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4384{
4385 struct nfs4_get_lease_time_data *data =
4386 (struct nfs4_get_lease_time_data *)calldata;
4387
4388 dprintk("--> %s\n", __func__);
4389 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4390 switch (task->tk_status) {
4391 case -NFS4ERR_DELAY:
4392 case -NFS4ERR_GRACE:
4393 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4394 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4395 task->tk_status = 0;
d61e612a 4396 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4397 return;
4398 }
2050f0cc
AA		 4399 dprintk("<-- %s\n", __func__);
4400}
4401
4402struct rpc_call_ops nfs4_get_lease_time_ops = {
4403 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4404 .rpc_call_done = nfs4_get_lease_time_done,
4405};
4406
4407int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4408{
4409 struct rpc_task *task;
4410 struct nfs4_get_lease_time_args args;
4411 struct nfs4_get_lease_time_res res = {
4412 .lr_fsinfo = fsinfo,
4413 };
4414 struct nfs4_get_lease_time_data data = {
4415 .args = &args,
4416 .res = &res,
4417 .clp = clp,
4418 };
4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4421 .rpc_argp = &args,
4422 .rpc_resp = &res,
4423 };
4424 struct rpc_task_setup task_setup = {
4425 .rpc_client = clp->cl_rpcclient,
4426 .rpc_message = &msg,
4427 .callback_ops = &nfs4_get_lease_time_ops,
4428 .callback_data = &data
4429 };
4430 int status;
4431
4432 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4433 dprintk("--> %s\n", __func__);
4434 task = rpc_run_task(&task_setup);
4435
4436 if (IS_ERR(task))
4437 status = PTR_ERR(task);
4438 else {
4439 status = task->tk_status;
4440 rpc_put_task(task);
4441 }
4442 dprintk("<-- %s return %d\n", __func__, status);
4443
4444 return status;
4445}
4446
b73dafa7
RL		 4447/*
4448 * Reset a slot table
4449 */
4450static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4451 int old_max_slots, int ivalue)
ac72b7b3 4452{
b73dafa7 4453 int i;
ac72b7b3
AA		 4454 int ret = 0;
4455
b73dafa7 4456 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4457
b73dafa7
RL		 4458 /*
4459 * Until we have dynamic slot table adjustment, insist
4460 * upon the same slot table size
4461 */
ac72b7b3
AA		 4462 if (max_slots != old_max_slots) {
4463 dprintk("%s reset slot table does't match old\n",
4464 __func__);
4465 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4466 goto out;
4467 }
4468 spin_lock(&tbl->slot_tbl_lock);
4469 for (i = 0; i < max_slots; ++i)
b73dafa7 4470 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4471 spin_unlock(&tbl->slot_tbl_lock);
4472 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4473 tbl, tbl->slots, tbl->max_slots);
4474out:
4475 dprintk("<-- %s: return %d\n", __func__, ret);
4476 return ret;
4477}
4478
b73dafa7
RL		 4479/*
4480 * Reset the forechannel and backchannel slot tables
4481 */
4482static int nfs4_reset_slot_tables(struct nfs4_session *session)
4483{
4484 int status;
4485
4486 status = nfs4_reset_slot_table(&session->fc_slot_table,
4487 session->fc_attrs.max_reqs,
4488 session->fc_slot_table.max_slots,
4489 1);
f8625a6a
RL		 4490 if (status)
4491 return status;
ea028ac9 4492 init_completion(&session->complete);
f8625a6a
RL		 4493
4494 status = nfs4_reset_slot_table(&session->bc_slot_table,
4495 session->bc_attrs.max_reqs,
4496 session->bc_slot_table.max_slots,
4497 0);
b73dafa7
RL		 4498 return status;
4499}
4500
f8625a6a
RL		 4501/* Destroy the slot table */
4502static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4503{
4504 if (session->fc_slot_table.slots != NULL) {
4505 kfree(session->fc_slot_table.slots);
4506 session->fc_slot_table.slots = NULL;
4507 }
4508 if (session->bc_slot_table.slots != NULL) {
4509 kfree(session->bc_slot_table.slots);
4510 session->bc_slot_table.slots = NULL;
4511 }
4512 return;
4513}
4514
fc931582
AA		 4515/*
4516 * Initialize slot table
4517 */
050047ce
RL		 4518static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4519 int max_slots, int ivalue)
fc931582 4520{
fc931582
AA		 4521 struct nfs4_slot *slot;
4522 int ret = -ENOMEM;
4523
4524 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4525
050047ce 4526 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4527
4528 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4529 if (!slot)
4530 goto out;
fc931582
AA		 4531 ret = 0;
4532
4533 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4534 tbl->max_slots = max_slots;
4535 tbl->slots = slot;
4536 tbl->highest_used_slotid = -1; /* no slot is currently used */
4537 spin_unlock(&tbl->slot_tbl_lock);
4538 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4539 tbl, tbl->slots, tbl->max_slots);
4540out:
4541 dprintk("<-- %s: return %d\n", __func__, ret);
4542 return ret;
fc931582
AA		 4543}
4544
050047ce
RL		 4545/*
4546 * Initialize the forechannel and backchannel tables
4547 */
4548static int nfs4_init_slot_tables(struct nfs4_session *session)
4549{
f26468fb
TM		 4550 struct nfs4_slot_table *tbl;
4551 int status = 0;
050047ce 4552
f26468fb
TM		 4553 tbl = &session->fc_slot_table;
4554 if (tbl->slots == NULL) {
4555 status = nfs4_init_slot_table(tbl,
4556 session->fc_attrs.max_reqs, 1);
4557 if (status)
4558 return status;
4559 }
050047ce 4560
f26468fb
TM		 4561 tbl = &session->bc_slot_table;
4562 if (tbl->slots == NULL) {
4563 status = nfs4_init_slot_table(tbl,
4564 session->bc_attrs.max_reqs, 0);
4565 if (status)
4566 nfs4_destroy_slot_tables(session);
4567 }
f8625a6a
RL		 4568
4569 return status;
557134a3
AA		 4570}
4571
4572struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4573{
4574 struct nfs4_session *session;
4575 struct nfs4_slot_table *tbl;
4576
4577 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4578 if (!session)
4579 return NULL;
76db6d95 4580
76db6d95
AA		 4581 /*
4582 * The create session reply races with the server back
4583 * channel probe. Mark the client NFS_CS_SESSION_INITING
4584 * so that the client back channel can find the
4585 * nfs_client struct
4586 */
4587 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4588 init_completion(&session->complete);
76db6d95 4589
557134a3
AA		 4590 tbl = &session->fc_slot_table;
4591 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4592 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4593
4594 tbl = &session->bc_slot_table;
4595 spin_lock_init(&tbl->slot_tbl_lock);
4596 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4597
557134a3
AA		 4598 session->clp = clp;
4599 return session;
4600}
4601
4602void nfs4_destroy_session(struct nfs4_session *session)
4603{
5a0ffe54
AA		 4604 nfs4_proc_destroy_session(session);
4605 dprintk("%s Destroy backchannel for xprt %p\n",
4606 __func__, session->clp->cl_rpcclient->cl_xprt);
4607 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4608 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4609 nfs4_destroy_slot_tables(session);
557134a3
AA		 4610 kfree(session);
4611}
4612
fc931582
AA		 4613/*
4614 * Initialize the values to be used by the client in CREATE_SESSION
4615 * If nfs4_init_session set the fore channel request and response sizes,
4616 * use them.
4617 *
4618 * Set the back channel max_resp_sz_cached to zero to force the client to
4619 * always set csa_cachethis to FALSE because the current implementation
4620 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4621 */
4622static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4623{
4624 struct nfs4_session *session = args->client->cl_session;
4625 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4626 mxresp_sz = session->fc_attrs.max_resp_sz;
4627
4628 if (mxrqst_sz == 0)
4629 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4630 if (mxresp_sz == 0)
4631 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4632 /* Fore channel attributes */
4633 args->fc_attrs.headerpadsz = 0;
4634 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4635 args->fc_attrs.max_resp_sz = mxresp_sz;
4636 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4637 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4638 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4639
4640 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4641 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4642 __func__,
4643 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4644 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4645 args->fc_attrs.max_reqs);
4646
4647 /* Back channel attributes */
4648 args->bc_attrs.headerpadsz = 0;
4649 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4650 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4651 args->bc_attrs.max_resp_sz_cached = 0;
4652 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4653 args->bc_attrs.max_reqs = 1;
4654
4655 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4656 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4657 __func__,
4658 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4659 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4660 args->bc_attrs.max_reqs);
4661}
4662
8d35301d
AA		 4663static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4664{
4665 if (rcvd <= sent)
4666 return 0;
4667 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4668 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4669 return -EINVAL;
4670}
4671
4672#define _verify_fore_channel_attr(_name_) \
4673 _verify_channel_attr("fore", #_name_, \
4674 args->fc_attrs._name_, \
4675 session->fc_attrs._name_)
4676
4677#define _verify_back_channel_attr(_name_) \
4678 _verify_channel_attr("back", #_name_, \
4679 args->bc_attrs._name_, \
4680 session->bc_attrs._name_)
4681
4682/*
4683 * The server is not allowed to increase the fore channel header pad size,
4684 * maximum response size, or maximum number of operations.
4685 *
4686 * The back channel attributes are only negotiatied down: We send what the
4687 * (back channel) server insists upon.
4688 */
4689static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4690 struct nfs4_session *session)
4691{
4692 int ret = 0;
4693
4694 ret |= _verify_fore_channel_attr(headerpadsz);
4695 ret |= _verify_fore_channel_attr(max_resp_sz);
4696 ret |= _verify_fore_channel_attr(max_ops);
4697
4698 ret |= _verify_back_channel_attr(headerpadsz);
4699 ret |= _verify_back_channel_attr(max_rqst_sz);
4700 ret |= _verify_back_channel_attr(max_resp_sz);
4701 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4702 ret |= _verify_back_channel_attr(max_ops);
4703 ret |= _verify_back_channel_attr(max_reqs);
4704
4705 return ret;
4706}
4707
fc931582
AA		 4708static int _nfs4_proc_create_session(struct nfs_client *clp)
4709{
4710 struct nfs4_session *session = clp->cl_session;
4711 struct nfs41_create_session_args args = {
4712 .client = clp,
4713 .cb_program = NFS4_CALLBACK,
4714 };
4715 struct nfs41_create_session_res res = {
4716 .client = clp,
4717 };
4718 struct rpc_message msg = {
4719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4720 .rpc_argp = &args,
4721 .rpc_resp = &res,
4722 };
4723 int status;
4724
4725 nfs4_init_channel_attrs(&args);
0f91421e 4726 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4727
4728 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4729
8d35301d
AA		 4730 if (!status)
4731 /* Verify the session's negotiated channel_attrs values */
4732 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4733 if (!status) {
4734 /* Increment the clientid slot sequence id */
4735 clp->cl_seqid++;
4736 }
4737
4738 return status;
4739}
4740
4741/*
4742 * Issues a CREATE_SESSION operation to the server.
4743 * It is the responsibility of the caller to verify the session is
4744 * expired before calling this routine.
4745 */
f26468fb 4746int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4747{
4748 int status;
4749 unsigned *ptr;
4750 struct nfs_fsinfo fsinfo;
4751 struct nfs4_session *session = clp->cl_session;
4752
4753 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4754
4755 status = _nfs4_proc_create_session(clp);
4756 if (status)
4757 goto out;
4758
f26468fb
TM		 4759 /* Init and reset the fore channel */
4760 status = nfs4_init_slot_tables(session);
4761 dprintk("slot table initialization returned %d\n", status);
4762 if (status)
4763 goto out;
4764 status = nfs4_reset_slot_tables(session);
4765 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4766 if (status)
4767 goto out;
4768
4769 ptr = (unsigned *)&session->sess_id.data[0];
4770 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4771 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4772
4773 /* Get the lease time */
4774 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4775 if (status == 0) {
4776 /* Update lease time and schedule renewal */
4777 spin_lock(&clp->cl_lock);
4778 clp->cl_lease_time = fsinfo.lease_time * HZ;
4779 clp->cl_last_renewal = jiffies;
fc931582
AA		 4780 spin_unlock(&clp->cl_lock);
4781
4782 nfs4_schedule_state_renewal(clp);
4783 }
4784out:
4785 dprintk("<-- %s\n", __func__);
4786 return status;
4787}
4788
0f3e66c6
AA		 4789/*
4790 * Issue the over-the-wire RPC DESTROY_SESSION.
4791 * The caller must serialize access to this routine.
4792 */
4793int nfs4_proc_destroy_session(struct nfs4_session *session)
4794{
4795 int status = 0;
4796 struct rpc_message msg;
4797
4798 dprintk("--> nfs4_proc_destroy_session\n");
4799
4800 /* session is still being setup */
4801 if (session->clp->cl_cons_state != NFS_CS_READY)
4802 return status;
4803
4804 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4805 msg.rpc_argp = session;
4806 msg.rpc_resp = NULL;
4807 msg.rpc_cred = NULL;
4808 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4809
4810 if (status)
4811 printk(KERN_WARNING
4812 "Got error %d from the server on DESTROY_SESSION. "
4813 "Session has been destroyed regardless...\n", status);
4814
4815 dprintk("<-- nfs4_proc_destroy_session\n");
4816 return status;
4817}
4818
fccba804
TM		 4819int nfs4_init_session(struct nfs_server *server)
4820{
4821 struct nfs_client *clp = server->nfs_client;
2449ea2e 4822 struct nfs4_session *session;
fccba804
TM		 4823 int ret;
4824
4825 if (!nfs4_has_session(clp))
4826 return 0;
4827
2449ea2e
AB		 4828 session = clp->cl_session;
4829 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4830 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4831
fccba804
TM		 4832 ret = nfs4_recover_expired_lease(server);
4833 if (!ret)
4834 ret = nfs4_check_client_ready(clp);
4835 return ret;
4836}
4837
fc01cea9
AA		 4838/*
4839 * Renew the cl_session lease.
4840 */
4841static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4842{
4843 struct nfs4_sequence_args args;
4844 struct nfs4_sequence_res res;
4845
4846 struct rpc_message msg = {
4847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4848 .rpc_argp = &args,
4849 .rpc_resp = &res,
4850 .rpc_cred = cred,
4851 };
4852
4853 args.sa_cache_this = 0;
4854
4855 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4856 &res, 0);
4857}
4858
4859void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4860{
4861 struct nfs_client *clp = (struct nfs_client *)data;
4862
4863 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4864
4865 if (task->tk_status < 0) {
4866 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4867
4868 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4869 == -EAGAIN) {
d61e612a 4870 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4871 return;
4872 }
4873 }
fc01cea9
AA		 4874 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4875
fc01cea9
AA		 4876 kfree(task->tk_msg.rpc_argp);
4877 kfree(task->tk_msg.rpc_resp);
4878
4879 dprintk("<-- %s\n", __func__);
4880}
4881
4882static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4883{
4884 struct nfs_client *clp;
4885 struct nfs4_sequence_args *args;
4886 struct nfs4_sequence_res *res;
4887
4888 clp = (struct nfs_client *)data;
4889 args = task->tk_msg.rpc_argp;
4890 res = task->tk_msg.rpc_resp;
4891
4892 if (nfs4_setup_sequence(clp, args, res, 0, task))
4893 return;
4894 rpc_call_start(task);
4895}
4896
4897static const struct rpc_call_ops nfs41_sequence_ops = {
4898 .rpc_call_done = nfs41_sequence_call_done,
4899 .rpc_call_prepare = nfs41_sequence_prepare,
4900};
4901
4902static int nfs41_proc_async_sequence(struct nfs_client *clp,
4903 struct rpc_cred *cred)
4904{
4905 struct nfs4_sequence_args *args;
4906 struct nfs4_sequence_res *res;
4907 struct rpc_message msg = {
4908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4909 .rpc_cred = cred,
4910 };
4911
4912 args = kzalloc(sizeof(*args), GFP_KERNEL);
4913 if (!args)
4914 return -ENOMEM;
4915 res = kzalloc(sizeof(*res), GFP_KERNEL);
4916 if (!res) {
4917 kfree(args);
4918 return -ENOMEM;
4919 }
4920 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4921 msg.rpc_argp = args;
4922 msg.rpc_resp = res;
4923
4924 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4925 &nfs41_sequence_ops, (void *)clp);
4926}
4927
fce5c838
RL		 4928struct nfs4_reclaim_complete_data {
4929 struct nfs_client *clp;
4930 struct nfs41_reclaim_complete_args arg;
4931 struct nfs41_reclaim_complete_res res;
4932};
4933
4934static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4935{
4936 struct nfs4_reclaim_complete_data *calldata = data;
4937
4938 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4939 &calldata->res.seq_res, 0, task))
4940 return;
4941
4942 rpc_call_start(task);
4943}
4944
4945static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4946{
4947 struct nfs4_reclaim_complete_data *calldata = data;
4948 struct nfs_client *clp = calldata->clp;
4949 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4950
4951 dprintk("--> %s\n", __func__);
4952 nfs41_sequence_done(clp, res, task->tk_status);
4953 switch (task->tk_status) {
4954 case 0:
4955 case -NFS4ERR_COMPLETE_ALREADY:
4956 break;
4957 case -NFS4ERR_BADSESSION:
4958 case -NFS4ERR_DEADSESSION:
4959 /*
4960 * Handle the session error, but do not retry the operation, as
4961 * we have no way of telling whether the clientid had to be
4962 * reset before we got our reply. If reset, a new wave of
4963 * reclaim operations will follow, containing their own reclaim
4964 * complete. We don't want our retry to get on the way of
4965 * recovery by incorrectly indicating to the server that we're
4966 * done reclaiming state since the process had to be restarted.
4967 */
4968 _nfs4_async_handle_error(task, NULL, clp, NULL);
4969 break;
4970 default:
4971 if (_nfs4_async_handle_error(
4972 task, NULL, clp, NULL) == -EAGAIN) {
4973 rpc_restart_call_prepare(task);
4974 return;
4975 }
4976 }
fce5c838
RL		 4977
4978 dprintk("<-- %s\n", __func__);
4979}
4980
4981static void nfs4_free_reclaim_complete_data(void *data)
4982{
4983 struct nfs4_reclaim_complete_data *calldata = data;
4984
4985 kfree(calldata);
4986}
4987
4988static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4989 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4990 .rpc_call_done = nfs4_reclaim_complete_done,
4991 .rpc_release = nfs4_free_reclaim_complete_data,
4992};
4993
4994/*
4995 * Issue a global reclaim complete.
4996 */
4997static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4998{
4999 struct nfs4_reclaim_complete_data *calldata;
5000 struct rpc_task *task;
5001 struct rpc_message msg = {
5002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5003 };
5004 struct rpc_task_setup task_setup_data = {
5005 .rpc_client = clp->cl_rpcclient,
5006 .rpc_message = &msg,
5007 .callback_ops = &nfs4_reclaim_complete_call_ops,
5008 .flags = RPC_TASK_ASYNC,
5009 };
5010 int status = -ENOMEM;
5011
5012 dprintk("--> %s\n", __func__);
5013 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5014 if (calldata == NULL)
5015 goto out;
5016 calldata->clp = clp;
5017 calldata->arg.one_fs = 0;
5018 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5019
5020 msg.rpc_argp = &calldata->arg;
5021 msg.rpc_resp = &calldata->res;
5022 task_setup_data.callback_data = calldata;
5023 task = rpc_run_task(&task_setup_data);
5024 if (IS_ERR(task))
5025 status = PTR_ERR(task);
5026 rpc_put_task(task);
5027out:
5028 dprintk("<-- %s status=%d\n", __func__, status);
5029 return status;
5030}
557134a3
AA		 5031#endif /* CONFIG_NFS_V4_1 */
5032
591d71cb 5033struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5034 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5035 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5036 .recover_open = nfs4_open_reclaim,
5037 .recover_lock = nfs4_lock_reclaim,
591d71cb 5038 .establish_clid = nfs4_init_clientid,
90a16617 5039 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5040};
5041
591d71cb
AA		 5042#if defined(CONFIG_NFS_V4_1)
5043struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5044 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5045 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5046 .recover_open = nfs4_open_reclaim,
5047 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5048 .establish_clid = nfs41_init_clientid,
b4b82607 5049 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5050 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5051};
5052#endif /* CONFIG_NFS_V4_1 */
5053
5054struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5055 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5056 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5057 .recover_open = nfs4_open_expired,
5058 .recover_lock = nfs4_lock_expired,
5059 .establish_clid = nfs4_init_clientid,
90a16617 5060 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5061};
5062
5063#if defined(CONFIG_NFS_V4_1)
5064struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5065 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5066 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5067 .recover_open = nfs4_open_expired,
5068 .recover_lock = nfs4_lock_expired,
4d643d1d 5069 .establish_clid = nfs41_init_clientid,
b4b82607 5070 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5071};
591d71cb 5072#endif /* CONFIG_NFS_V4_1 */
1da177e4 5073
29fba38b
BH		 5074struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5075 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5076 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5077 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5078};
5079
5080#if defined(CONFIG_NFS_V4_1)
5081struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5082 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5083 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5084 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5085};
5086#endif
5087
5088/*
5089 * Per minor version reboot and network partition recovery ops
5090 */
5091
591d71cb
AA		 5092struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5093 &nfs40_reboot_recovery_ops,
5094#if defined(CONFIG_NFS_V4_1)
5095 &nfs41_reboot_recovery_ops,
5096#endif
5097};
5098
5099struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5100 &nfs40_nograce_recovery_ops,
5101#if defined(CONFIG_NFS_V4_1)
5102 &nfs41_nograce_recovery_ops,
5103#endif
5104};
5105
29fba38b
BH		 5106struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5107 &nfs40_state_renewal_ops,
5108#if defined(CONFIG_NFS_V4_1)
5109 &nfs41_state_renewal_ops,
5110#endif
5111};
5112
92e1d5be 5113static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5114 .permission = nfs_permission,
5115 .getattr = nfs_getattr,
5116 .setattr = nfs_setattr,
5117 .getxattr = nfs4_getxattr,
5118 .setxattr = nfs4_setxattr,
5119 .listxattr = nfs4_listxattr,
5120};
5121
509de811 5122const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5123 .version = 4, /* protocol version */
5124 .dentry_ops = &nfs4_dentry_operations,
5125 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5126 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5127 .getroot = nfs4_proc_get_root,
5128 .getattr = nfs4_proc_getattr,
5129 .setattr = nfs4_proc_setattr,
2b3de441 5130 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5131 .lookup = nfs4_proc_lookup,
5132 .access = nfs4_proc_access,
5133 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5134 .create = nfs4_proc_create,
5135 .remove = nfs4_proc_remove,
5136 .unlink_setup = nfs4_proc_unlink_setup,
5137 .unlink_done = nfs4_proc_unlink_done,
5138 .rename = nfs4_proc_rename,
5139 .link = nfs4_proc_link,
5140 .symlink = nfs4_proc_symlink,
5141 .mkdir = nfs4_proc_mkdir,
5142 .rmdir = nfs4_proc_remove,
5143 .readdir = nfs4_proc_readdir,
5144 .mknod = nfs4_proc_mknod,
5145 .statfs = nfs4_proc_statfs,
5146 .fsinfo = nfs4_proc_fsinfo,
5147 .pathconf = nfs4_proc_pathconf,
e9326dca 5148 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5149 .decode_dirent = nfs4_decode_dirent,
5150 .read_setup = nfs4_proc_read_setup,
ec06c096 5151 .read_done = nfs4_read_done,
1da177e4 5152 .write_setup = nfs4_proc_write_setup,
788e7a89 5153 .write_done = nfs4_write_done,
1da177e4 5154 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5155 .commit_done = nfs4_commit_done,
1da177e4 5156 .lock = nfs4_proc_lock,
e50a1c2e 5157 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5158 .close_context = nfs4_close_context,
1da177e4
LT		 5159};
5160
5161/*
5162 * Local variables:
5163 * c-basic-offset: 8
5164 * End:
5165 */
Linux 6.x block layer and io_uring tree(s)