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NFSv4: Ensure the state manager handles NFS4ERR_NO_GRACE correctly
[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);
273 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
274 exception->retry = 1;
275 /* FALLTHROUGH */
276#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM		 277 case -NFS4ERR_FILE_OPEN:
278 case -NFS4ERR_GRACE:
279 case -NFS4ERR_DELAY:
280 ret = nfs4_delay(server->client, &exception->timeout);
281 if (ret != 0)
282 break;
283 case -NFS4ERR_OLD_STATEID:
284 exception->retry = 1;
285 }
286 /* We failed to handle the error */
287 return nfs4_map_errors(ret);
288}
289
290
26e976a8 291static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 292{
7539bbab 293 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 294 spin_lock(&clp->cl_lock);
295 if (time_before(clp->cl_last_renewal,timestamp))
296 clp->cl_last_renewal = timestamp;
297 spin_unlock(&clp->cl_lock);
298}
299
cccef3b9
AA		 300#if defined(CONFIG_NFS_V4_1)
301
e2c4ab3c
AA		 302/*
303 * nfs4_free_slot - free a slot and efficiently update slot table.
304 *
305 * freeing a slot is trivially done by clearing its respective bit
306 * in the bitmap.
307 * If the freed slotid equals highest_used_slotid we want to update it
308 * so that the server would be able to size down the slot table if needed,
309 * otherwise we know that the highest_used_slotid is still in use.
310 * When updating highest_used_slotid there may be "holes" in the bitmap
311 * so we need to scan down from highest_used_slotid to 0 looking for the now
312 * highest slotid in use.
313 * If none found, highest_used_slotid is set to -1.
314 */
315static void
316nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
317{
318 int slotid = free_slotid;
319
320 spin_lock(&tbl->slot_tbl_lock);
321 /* clear used bit in bitmap */
322 __clear_bit(slotid, tbl->used_slots);
323
324 /* update highest_used_slotid when it is freed */
325 if (slotid == tbl->highest_used_slotid) {
326 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
327 if (slotid >= 0 && slotid < tbl->max_slots)
328 tbl->highest_used_slotid = slotid;
329 else
330 tbl->highest_used_slotid = -1;
331 }
332 rpc_wake_up_next(&tbl->slot_tbl_waitq);
333 spin_unlock(&tbl->slot_tbl_lock);
334 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
335 free_slotid, tbl->highest_used_slotid);
336}
337
13615871
AA		 338void nfs41_sequence_free_slot(const struct nfs_client *clp,
339 struct nfs4_sequence_res *res)
340{
341 struct nfs4_slot_table *tbl;
342
343 if (!nfs4_has_session(clp)) {
344 dprintk("%s: No session\n", __func__);
345 return;
346 }
347 tbl = &clp->cl_session->fc_slot_table;
348 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
349 dprintk("%s: No slot\n", __func__);
350 /* just wake up the next guy waiting since
351 * we may have not consumed a slot after all */
352 rpc_wake_up_next(&tbl->slot_tbl_waitq);
353 return;
354 }
355 nfs4_free_slot(tbl, res->sr_slotid);
356 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
357}
358
b0df806c
AA		 359static void nfs41_sequence_done(struct nfs_client *clp,
360 struct nfs4_sequence_res *res,
361 int rpc_status)
362{
363 unsigned long timestamp;
364 struct nfs4_slot_table *tbl;
365 struct nfs4_slot *slot;
366
367 /*
368 * sr_status remains 1 if an RPC level error occurred. The server
369 * may or may not have processed the sequence operation..
370 * Proceed as if the server received and processed the sequence
371 * operation.
372 */
373 if (res->sr_status == 1)
374 res->sr_status = NFS_OK;
375
376 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
377 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
378 goto out;
379
380 tbl = &clp->cl_session->fc_slot_table;
381 slot = tbl->slots + res->sr_slotid;
382
383 if (res->sr_status == 0) {
384 /* Update the slot's sequence and clientid lease timer */
385 ++slot->seq_nr;
386 timestamp = res->sr_renewal_time;
387 spin_lock(&clp->cl_lock);
388 if (time_before(clp->cl_last_renewal, timestamp))
389 clp->cl_last_renewal = timestamp;
390 spin_unlock(&clp->cl_lock);
391 return;
392 }
393out:
394 /* The session may be reset by one of the error handlers. */
395 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
396 nfs41_sequence_free_slot(clp, res);
397}
398
510b8175
BH		 399/*
400 * nfs4_find_slot - efficiently look for a free slot
401 *
402 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
403 * If found, we mark the slot as used, update the highest_used_slotid,
404 * and respectively set up the sequence operation args.
405 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 406 *
407 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 408 */
409static u8
410nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
411{
412 int slotid;
413 u8 ret_id = NFS4_MAX_SLOT_TABLE;
414 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
415
510b8175
BH		 416 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
417 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
418 tbl->max_slots);
419 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
420 if (slotid >= tbl->max_slots)
421 goto out;
422 __set_bit(slotid, tbl->used_slots);
423 if (slotid > tbl->highest_used_slotid)
424 tbl->highest_used_slotid = slotid;
425 ret_id = slotid;
426out:
427 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
428 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 429 return ret_id;
430}
431
b069d94a
AA		 432static int nfs4_recover_session(struct nfs4_session *session)
433{
434 struct nfs_client *clp = session->clp;
a78cb57a 435 unsigned int loop;
b069d94a
AA		 436 int ret;
437
a78cb57a 438 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
b069d94a
AA		 439 ret = nfs4_wait_clnt_recover(clp);
440 if (ret != 0)
a78cb57a 441 break;
b069d94a
AA		 442 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
443 break;
444 nfs4_schedule_state_manager(clp);
a78cb57a 445 ret = -EIO;
b069d94a 446 }
a78cb57a 447 return ret;
b069d94a
AA		 448}
449
ce5039c1
AA		 450static int nfs41_setup_sequence(struct nfs4_session *session,
451 struct nfs4_sequence_args *args,
452 struct nfs4_sequence_res *res,
453 int cache_reply,
454 struct rpc_task *task)
455{
fbcd4abc
AA		 456 struct nfs4_slot *slot;
457 struct nfs4_slot_table *tbl;
b069d94a 458 int status = 0;
fbcd4abc
AA		 459 u8 slotid;
460
461 dprintk("--> %s\n", __func__);
ce5039c1
AA		 462 /* slot already allocated? */
463 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
464 return 0;
465
466 memset(res, 0, sizeof(*res));
467 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 468 tbl = &session->fc_slot_table;
469
470 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 471 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
472 if (tbl->highest_used_slotid != -1) {
473 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
474 spin_unlock(&tbl->slot_tbl_lock);
475 dprintk("<-- %s: Session reset: draining\n", __func__);
476 return -EAGAIN;
477 }
478
479 /* The slot table is empty; start the reset thread */
480 dprintk("%s Session Reset\n", __func__);
481 spin_unlock(&tbl->slot_tbl_lock);
482 status = nfs4_recover_session(session);
483 if (status)
484 return status;
485 spin_lock(&tbl->slot_tbl_lock);
486 }
487
fbcd4abc
AA		 488 slotid = nfs4_find_slot(tbl, task);
489 if (slotid == NFS4_MAX_SLOT_TABLE) {
490 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
491 spin_unlock(&tbl->slot_tbl_lock);
492 dprintk("<-- %s: no free slots\n", __func__);
493 return -EAGAIN;
494 }
495 spin_unlock(&tbl->slot_tbl_lock);
496
497 slot = tbl->slots + slotid;
99fe60d0 498 args->sa_session = session;
fbcd4abc
AA		 499 args->sa_slotid = slotid;
500 args->sa_cache_this = cache_reply;
501
502 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
503
99fe60d0 504 res->sr_session = session;
fbcd4abc
AA		 505 res->sr_slotid = slotid;
506 res->sr_renewal_time = jiffies;
507 /*
508 * sr_status is only set in decode_sequence, and so will remain
509 * set to 1 if an rpc level failure occurs.
510 */
511 res->sr_status = 1;
ce5039c1
AA		 512 return 0;
513}
514
515int nfs4_setup_sequence(struct nfs_client *clp,
516 struct nfs4_sequence_args *args,
517 struct nfs4_sequence_res *res,
518 int cache_reply,
519 struct rpc_task *task)
520{
521 int ret = 0;
522
523 dprintk("--> %s clp %p session %p sr_slotid %d\n",
524 __func__, clp, clp->cl_session, res->sr_slotid);
525
526 if (!nfs4_has_session(clp))
527 goto out;
528 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
529 task);
530 if (ret != -EAGAIN) {
531 /* terminate rpc task */
532 task->tk_status = ret;
533 task->tk_action = NULL;
534 }
535out:
536 dprintk("<-- %s status=%d\n", __func__, ret);
537 return ret;
538}
539
540struct nfs41_call_sync_data {
541 struct nfs_client *clp;
542 struct nfs4_sequence_args *seq_args;
543 struct nfs4_sequence_res *seq_res;
544 int cache_reply;
545};
546
547static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
548{
549 struct nfs41_call_sync_data *data = calldata;
550
551 dprintk("--> %s data->clp->cl_session %p\n", __func__,
552 data->clp->cl_session);
553 if (nfs4_setup_sequence(data->clp, data->seq_args,
554 data->seq_res, data->cache_reply, task))
555 return;
556 rpc_call_start(task);
557}
558
69ab40c4
AA		 559static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
560{
561 struct nfs41_call_sync_data *data = calldata;
562
563 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
564 nfs41_sequence_free_slot(data->clp, data->seq_res);
565}
566
ce5039c1
AA		 567struct rpc_call_ops nfs41_call_sync_ops = {
568 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 569 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 570};
571
572static int nfs4_call_sync_sequence(struct nfs_client *clp,
573 struct rpc_clnt *clnt,
574 struct rpc_message *msg,
575 struct nfs4_sequence_args *args,
576 struct nfs4_sequence_res *res,
577 int cache_reply)
578{
579 int ret;
580 struct rpc_task *task;
581 struct nfs41_call_sync_data data = {
582 .clp = clp,
583 .seq_args = args,
584 .seq_res = res,
585 .cache_reply = cache_reply,
586 };
587 struct rpc_task_setup task_setup = {
588 .rpc_client = clnt,
589 .rpc_message = msg,
590 .callback_ops = &nfs41_call_sync_ops,
591 .callback_data = &data
592 };
593
594 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
595 task = rpc_run_task(&task_setup);
596 if (IS_ERR(task))
597 ret = PTR_ERR(task);
598 else {
599 ret = task->tk_status;
600 rpc_put_task(task);
601 }
602 return ret;
603}
604
cccef3b9
AA		 605int _nfs4_call_sync_session(struct nfs_server *server,
606 struct rpc_message *msg,
607 struct nfs4_sequence_args *args,
608 struct nfs4_sequence_res *res,
609 int cache_reply)
610{
ce5039c1
AA		 611 return nfs4_call_sync_sequence(server->nfs_client, server->client,
612 msg, args, res, cache_reply);
cccef3b9
AA		 613}
614
615#endif /* CONFIG_NFS_V4_1 */
616
617int _nfs4_call_sync(struct nfs_server *server,
618 struct rpc_message *msg,
619 struct nfs4_sequence_args *args,
620 struct nfs4_sequence_res *res,
621 int cache_reply)
622{
f3752975 623 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 624 return rpc_call_sync(server->client, msg, 0);
625}
626
627#define nfs4_call_sync(server, msg, args, res, cache_reply) \
628 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
629 &(res)->seq_res, (cache_reply))
630
b0df806c
AA		 631static void nfs4_sequence_done(const struct nfs_server *server,
632 struct nfs4_sequence_res *res, int rpc_status)
633{
634#ifdef CONFIG_NFS_V4_1
635 if (nfs4_has_session(server->nfs_client))
636 nfs41_sequence_done(server->nfs_client, res, rpc_status);
637#endif /* CONFIG_NFS_V4_1 */
638}
639
640/* no restart, therefore free slot here */
641static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
642 struct nfs4_sequence_res *res,
643 int rpc_status)
644{
645 nfs4_sequence_done(server, res, rpc_status);
646 nfs4_sequence_free_slot(server->nfs_client, res);
647}
648
38478b24 649static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 650{
38478b24 651 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 652
38478b24 653 spin_lock(&dir->i_lock);
40d24704
TM		 654 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
655 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 656 nfs_force_lookup_revalidate(dir);
40d24704 657 nfsi->change_attr = cinfo->after;
38478b24 658 spin_unlock(&dir->i_lock);
1da177e4
LT		 659}
660
e56e0b78 661struct nfs4_opendata {
c6d00e63 662 struct kref kref;
e56e0b78
TM		 663 struct nfs_openargs o_arg;
664 struct nfs_openres o_res;
cdd4e68b
TM		 665 struct nfs_open_confirmargs c_arg;
666 struct nfs_open_confirmres c_res;
e56e0b78
TM		 667 struct nfs_fattr f_attr;
668 struct nfs_fattr dir_attr;
ad389da7 669 struct path path;
e56e0b78
TM		 670 struct dentry *dir;
671 struct nfs4_state_owner *owner;
aac00a8d 672 struct nfs4_state *state;
e56e0b78 673 struct iattr attrs;
26e976a8 674 unsigned long timestamp;
3e309914 675 unsigned int rpc_done : 1;
24ac23ab
TM		 676 int rpc_status;
677 int cancelled;
e56e0b78
TM		 678};
679
2ced46c2
TM		 680
681static void nfs4_init_opendata_res(struct nfs4_opendata *p)
682{
683 p->o_res.f_attr = &p->f_attr;
684 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 685 p->o_res.seqid = p->o_arg.seqid;
686 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 687 p->o_res.server = p->o_arg.server;
688 nfs_fattr_init(&p->f_attr);
689 nfs_fattr_init(&p->dir_attr);
578e4585 690 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 691}
692
ad389da7 693static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 694 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 695 const struct iattr *attrs)
696{
ad389da7 697 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 698 struct inode *dir = parent->d_inode;
699 struct nfs_server *server = NFS_SERVER(dir);
700 struct nfs4_opendata *p;
701
702 p = kzalloc(sizeof(*p), GFP_KERNEL);
703 if (p == NULL)
704 goto err;
705 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
706 if (p->o_arg.seqid == NULL)
707 goto err_free;
ad389da7
TM		 708 p->path.mnt = mntget(path->mnt);
709 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 710 p->dir = parent;
711 p->owner = sp;
712 atomic_inc(&sp->so_count);
713 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 714 p->o_arg.open_flags = flags;
715 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 716 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 717 p->o_arg.id = sp->so_owner_id.id;
ad389da7 718 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 719 p->o_arg.server = server;
720 p->o_arg.bitmask = server->attr_bitmask;
721 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 722 if (flags & O_EXCL) {
723 u32 *s = (u32 *) p->o_arg.u.verifier.data;
724 s[0] = jiffies;
725 s[1] = current->pid;
726 } else if (flags & O_CREAT) {
727 p->o_arg.u.attrs = &p->attrs;
728 memcpy(&p->attrs, attrs, sizeof(p->attrs));
729 }
cdd4e68b
TM		 730 p->c_arg.fh = &p->o_res.fh;
731 p->c_arg.stateid = &p->o_res.stateid;
732 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 733 nfs4_init_opendata_res(p);
c6d00e63 734 kref_init(&p->kref);
e56e0b78
TM		 735 return p;
736err_free:
737 kfree(p);
738err:
739 dput(parent);
740 return NULL;
741}
742
c6d00e63 743static void nfs4_opendata_free(struct kref *kref)
e56e0b78 744{
c6d00e63
TM		 745 struct nfs4_opendata *p = container_of(kref,
746 struct nfs4_opendata, kref);
747
748 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 749 if (p->state != NULL)
750 nfs4_put_open_state(p->state);
c6d00e63
TM		 751 nfs4_put_state_owner(p->owner);
752 dput(p->dir);
31f31db1 753 path_put(&p->path);
c6d00e63
TM		 754 kfree(p);
755}
756
757static void nfs4_opendata_put(struct nfs4_opendata *p)
758{
759 if (p != NULL)
760 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 761}
762
06f814a3
TM		 763static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
764{
06f814a3
TM		 765 int ret;
766
06f814a3 767 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 768 return ret;
769}
770
dc0b027d 771static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 772{
773 int ret = 0;
dc0b027d
TM		 774
775 if (open_mode & O_EXCL)
776 goto out;
777 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 778 case FMODE_READ:
779 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 780 break;
781 case FMODE_WRITE:
782 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 783 break;
784 case FMODE_READ|FMODE_WRITE:
785 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
786 }
dc0b027d 787out:
6ee41268
TM		 788 return ret;
789}
790
dc0b027d 791static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 792{
dc0b027d 793 if ((delegation->type & fmode) != fmode)
aac00a8d 794 return 0;
15c831bf 795 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 796 return 0;
b7391f44 797 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 798 return 1;
799}
800
dc0b027d 801static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 802{
dc0b027d 803 switch (fmode) {
e7616923
TM		 804 case FMODE_WRITE:
805 state->n_wronly++;
806 break;
807 case FMODE_READ:
808 state->n_rdonly++;
809 break;
810 case FMODE_READ|FMODE_WRITE:
811 state->n_rdwr++;
812 }
dc0b027d 813 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 814}
815
dc0b027d 816static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 817{
818 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
819 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
820 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 821 switch (fmode) {
003707c7
TM		 822 case FMODE_READ:
823 set_bit(NFS_O_RDONLY_STATE, &state->flags);
824 break;
825 case FMODE_WRITE:
826 set_bit(NFS_O_WRONLY_STATE, &state->flags);
827 break;
828 case FMODE_READ|FMODE_WRITE:
829 set_bit(NFS_O_RDWR_STATE, &state->flags);
830 }
e7616923
TM		 831}
832
dc0b027d 833static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 834{
8bda4e4c 835 write_seqlock(&state->seqlock);
dc0b027d 836 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 837 write_sequnlock(&state->seqlock);
003707c7
TM		 838}
839
dc0b027d 840static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 841{
8bda4e4c
TM		 842 /*
843 * Protect the call to nfs4_state_set_mode_locked and
844 * serialise the stateid update
845 */
846 write_seqlock(&state->seqlock);
003707c7
TM		 847 if (deleg_stateid != NULL) {
848 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
849 set_bit(NFS_DELEGATED_STATE, &state->flags);
850 }
851 if (open_stateid != NULL)
dc0b027d 852 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 853 write_sequnlock(&state->seqlock);
854 spin_lock(&state->owner->so_lock);
dc0b027d 855 update_open_stateflags(state, fmode);
ec073428 856 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 857}
858
dc0b027d 859static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 860{
861 struct nfs_inode *nfsi = NFS_I(state->inode);
862 struct nfs_delegation *deleg_cur;
863 int ret = 0;
864
dc0b027d 865 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 866
867 rcu_read_lock();
868 deleg_cur = rcu_dereference(nfsi->delegation);
869 if (deleg_cur == NULL)
870 goto no_delegation;
871
872 spin_lock(&deleg_cur->lock);
873 if (nfsi->delegation != deleg_cur ||
dc0b027d 874 (deleg_cur->type & fmode) != fmode)
34310430
TM		 875 goto no_delegation_unlock;
876
877 if (delegation == NULL)
878 delegation = &deleg_cur->stateid;
879 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
880 goto no_delegation_unlock;
881
b7391f44 882 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 883 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 884 ret = 1;
885no_delegation_unlock:
886 spin_unlock(&deleg_cur->lock);
887no_delegation:
888 rcu_read_unlock();
889
890 if (!ret && open_stateid != NULL) {
dc0b027d 891 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 892 ret = 1;
893 }
894
895 return ret;
896}
897
898
dc0b027d 899static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 900{
901 struct nfs_delegation *delegation;
902
903 rcu_read_lock();
904 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 905 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 906 rcu_read_unlock();
907 return;
908 }
909 rcu_read_unlock();
910 nfs_inode_return_delegation(inode);
911}
912
6ee41268 913static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 914{
915 struct nfs4_state *state = opendata->state;
916 struct nfs_inode *nfsi = NFS_I(state->inode);
917 struct nfs_delegation *delegation;
dc0b027d
TM		 918 int open_mode = opendata->o_arg.open_flags & O_EXCL;
919 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 920 nfs4_stateid stateid;
921 int ret = -EAGAIN;
922
aac00a8d 923 for (;;) {
dc0b027d 924 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 925 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 926 if (can_open_cached(state, fmode, open_mode)) {
927 update_open_stateflags(state, fmode);
6ee41268 928 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 929 goto out_return_state;
930 }
931 spin_unlock(&state->owner->so_lock);
932 }
34310430
TM		 933 rcu_read_lock();
934 delegation = rcu_dereference(nfsi->delegation);
935 if (delegation == NULL ||
dc0b027d 936 !can_open_delegated(delegation, fmode)) {
34310430 937 rcu_read_unlock();
aac00a8d 938 break;
34310430 939 }
aac00a8d
TM		 940 /* Save the delegation */
941 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
942 rcu_read_unlock();
af22f94a 943 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 944 if (ret != 0)
945 goto out;
946 ret = -EAGAIN;
34310430
TM		 947
948 /* Try to update the stateid using the delegation */
dc0b027d 949 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 950 goto out_return_state;
aac00a8d 951 }
aac00a8d
TM		 952out:
953 return ERR_PTR(ret);
954out_return_state:
955 atomic_inc(&state->count);
956 return state;
957}
958
24ac23ab
TM		 959static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
960{
961 struct inode *inode;
962 struct nfs4_state *state = NULL;
003707c7 963 struct nfs_delegation *delegation;
1b370bc2 964 int ret;
24ac23ab 965
aac00a8d 966 if (!data->rpc_done) {
6ee41268 967 state = nfs4_try_open_cached(data);
aac00a8d
TM		 968 goto out;
969 }
970
1b370bc2 971 ret = -EAGAIN;
24ac23ab 972 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 973 goto err;
24ac23ab 974 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 975 ret = PTR_ERR(inode);
03f28e3a 976 if (IS_ERR(inode))
1b370bc2
TM		 977 goto err;
978 ret = -ENOMEM;
24ac23ab
TM		 979 state = nfs4_get_open_state(inode, data->owner);
980 if (state == NULL)
1b370bc2 981 goto err_put_inode;
549d6ed5 982 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 983 int delegation_flags = 0;
984
003707c7
TM		 985 rcu_read_lock();
986 delegation = rcu_dereference(NFS_I(inode)->delegation);
987 if (delegation)
988 delegation_flags = delegation->flags;
989 rcu_read_unlock();
15c831bf 990 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 991 nfs_inode_set_delegation(state->inode,
992 data->owner->so_cred,
993 &data->o_res);
994 else
995 nfs_inode_reclaim_delegation(state->inode,
996 data->owner->so_cred,
997 &data->o_res);
998 }
34310430
TM		 999
1000 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1001 data->o_arg.fmode);
24ac23ab 1002 iput(inode);
aac00a8d 1003out:
24ac23ab 1004 return state;
1b370bc2
TM		 1005err_put_inode:
1006 iput(inode);
1007err:
1008 return ERR_PTR(ret);
24ac23ab
TM		 1009}
1010
864472e9
TM		 1011static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1012{
1013 struct nfs_inode *nfsi = NFS_I(state->inode);
1014 struct nfs_open_context *ctx;
1015
1016 spin_lock(&state->inode->i_lock);
1017 list_for_each_entry(ctx, &nfsi->open_files, list) {
1018 if (ctx->state != state)
1019 continue;
1020 get_nfs_open_context(ctx);
1021 spin_unlock(&state->inode->i_lock);
1022 return ctx;
1023 }
1024 spin_unlock(&state->inode->i_lock);
1025 return ERR_PTR(-ENOENT);
1026}
1027
6f220ed5
TM		 1028static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1029{
1030 struct nfs4_opendata *opendata;
1031
dc0b027d 1032 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1033 if (opendata == NULL)
1034 return ERR_PTR(-ENOMEM);
1035 opendata->state = state;
1036 atomic_inc(&state->count);
1037 return opendata;
1038}
1039
dc0b027d 1040static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1041{
2ced46c2 1042 struct nfs4_state *newstate;
864472e9
TM		 1043 int ret;
1044
dc0b027d
TM		 1045 opendata->o_arg.open_flags = 0;
1046 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1047 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1048 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1049 nfs4_init_opendata_res(opendata);
864472e9
TM		 1050 ret = _nfs4_proc_open(opendata);
1051 if (ret != 0)
1052 return ret;
2ced46c2 1053 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1054 if (IS_ERR(newstate))
1055 return PTR_ERR(newstate);
dc0b027d 1056 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1057 *res = newstate;
864472e9
TM		 1058 return 0;
1059}
1060
1061static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1062{
864472e9 1063 struct nfs4_state *newstate;
864472e9
TM		 1064 int ret;
1065
1066 /* memory barrier prior to reading state->n_* */
2ced46c2 1067 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1068 smp_rmb();
1069 if (state->n_rdwr != 0) {
2ced46c2 1070 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1071 if (ret != 0)
1072 return ret;
2ced46c2
TM		 1073 if (newstate != state)
1074 return -ESTALE;
864472e9
TM		 1075 }
1076 if (state->n_wronly != 0) {
2ced46c2 1077 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1078 if (ret != 0)
1079 return ret;
2ced46c2
TM		 1080 if (newstate != state)
1081 return -ESTALE;
864472e9
TM		 1082 }
1083 if (state->n_rdonly != 0) {
2ced46c2 1084 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1085 if (ret != 0)
1086 return ret;
2ced46c2
TM		 1087 if (newstate != state)
1088 return -ESTALE;
864472e9 1089 }
1ac7e2fd
TM		 1090 /*
1091 * We may have performed cached opens for all three recoveries.
1092 * Check if we need to update the current stateid.
1093 */
1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1095 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1096 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1097 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1098 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1099 write_sequnlock(&state->seqlock);
1ac7e2fd 1100 }
864472e9
TM		 1101 return 0;
1102}
1103
1da177e4
LT		 1104/*
1105 * OPEN_RECLAIM:
1106 * reclaim state on the server after a reboot.
1da177e4 1107 */
539cd03a 1108static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1109{
1ac7e2fd 1110 struct nfs_delegation *delegation;
864472e9 1111 struct nfs4_opendata *opendata;
dc0b027d 1112 fmode_t delegation_type = 0;
1da177e4
LT		 1113 int status;
1114
6f220ed5
TM		 1115 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1116 if (IS_ERR(opendata))
1117 return PTR_ERR(opendata);
864472e9
TM		 1118 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1119 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1120 rcu_read_lock();
1121 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1122 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1123 delegation_type = delegation->type;
1ac7e2fd 1124 rcu_read_unlock();
864472e9
TM		 1125 opendata->o_arg.u.delegation_type = delegation_type;
1126 status = nfs4_open_recover(opendata, state);
c6d00e63 1127 nfs4_opendata_put(opendata);
1da177e4
LT		 1128 return status;
1129}
1130
539cd03a 1131static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1132{
1133 struct nfs_server *server = NFS_SERVER(state->inode);
1134 struct nfs4_exception exception = { };
1135 int err;
1136 do {
539cd03a 1137 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1138 if (err != -NFS4ERR_DELAY)
1139 break;
1140 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1141 } while (exception.retry);
1142 return err;
1143}
1144
864472e9
TM		 1145static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1146{
1147 struct nfs_open_context *ctx;
1148 int ret;
1149
1150 ctx = nfs4_state_find_open_context(state);
1151 if (IS_ERR(ctx))
1152 return PTR_ERR(ctx);
539cd03a 1153 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1154 put_nfs_open_context(ctx);
1155 return ret;
1156}
1157
13437e12 1158static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1159{
e56e0b78 1160 struct nfs4_opendata *opendata;
864472e9 1161 int ret;
1da177e4 1162
6f220ed5
TM		 1163 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1164 if (IS_ERR(opendata))
1165 return PTR_ERR(opendata);
e56e0b78 1166 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1167 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1168 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1169 ret = nfs4_open_recover(opendata, state);
c6d00e63 1170 nfs4_opendata_put(opendata);
864472e9 1171 return ret;
1da177e4
LT		 1172}
1173
13437e12 1174int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1175{
1176 struct nfs4_exception exception = { };
539cd03a 1177 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1178 int err;
1179 do {
13437e12 1180 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1181 switch (err) {
1182 case 0:
965b5d67
TM		 1183 case -ENOENT:
1184 case -ESTALE:
1185 goto out;
1da177e4
LT		 1186 case -NFS4ERR_STALE_CLIENTID:
1187 case -NFS4ERR_STALE_STATEID:
1188 case -NFS4ERR_EXPIRED:
1189 /* Don't recall a delegation if it was lost */
7539bbab 1190 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1191 goto out;
1192 case -ERESTARTSYS:
1193 /*
1194 * The show must go on: exit, but mark the
1195 * stateid as needing recovery.
1196 */
1197 case -NFS4ERR_ADMIN_REVOKED:
1198 case -NFS4ERR_BAD_STATEID:
1199 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1200 case -ENOMEM:
1201 err = 0;
1202 goto out;
1da177e4
LT		 1203 }
1204 err = nfs4_handle_exception(server, err, &exception);
1205 } while (exception.retry);
965b5d67 1206out:
1da177e4
LT		 1207 return err;
1208}
1209
cdd4e68b
TM		 1210static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1211{
1212 struct nfs4_opendata *data = calldata;
1213
1214 data->rpc_status = task->tk_status;
1215 if (RPC_ASSASSINATED(task))
1216 return;
26e976a8 1217 if (data->rpc_status == 0) {
cdd4e68b
TM		 1218 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1219 sizeof(data->o_res.stateid.data));
bb22629e 1220 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1221 renew_lease(data->o_res.server, data->timestamp);
3e309914 1222 data->rpc_done = 1;
26e976a8 1223 }
cdd4e68b
TM		 1224}
1225
1226static void nfs4_open_confirm_release(void *calldata)
1227{
1228 struct nfs4_opendata *data = calldata;
1229 struct nfs4_state *state = NULL;
1230
1231 /* If this request hasn't been cancelled, do nothing */
1232 if (data->cancelled == 0)
1233 goto out_free;
1234 /* In case of error, no cleanup! */
3e309914 1235 if (!data->rpc_done)
cdd4e68b 1236 goto out_free;
cdd4e68b 1237 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1238 if (!IS_ERR(state))
dc0b027d 1239 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1240out_free:
c6d00e63 1241 nfs4_opendata_put(data);
cdd4e68b
TM		 1242}
1243
1244static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1245 .rpc_call_done = nfs4_open_confirm_done,
1246 .rpc_release = nfs4_open_confirm_release,
1247};
1248
1249/*
1250 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1251 */
1252static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1253{
1254 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1255 struct rpc_task *task;
5138fde0
TM		 1256 struct rpc_message msg = {
1257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1258 .rpc_argp = &data->c_arg,
1259 .rpc_resp = &data->c_res,
1260 .rpc_cred = data->owner->so_cred,
1261 };
c970aa85
TM		 1262 struct rpc_task_setup task_setup_data = {
1263 .rpc_client = server->client,
5138fde0 1264 .rpc_message = &msg,
c970aa85
TM		 1265 .callback_ops = &nfs4_open_confirm_ops,
1266 .callback_data = data,
101070ca 1267 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1268 .flags = RPC_TASK_ASYNC,
1269 };
1da177e4
LT		 1270 int status;
1271
c6d00e63 1272 kref_get(&data->kref);
3e309914
TM		 1273 data->rpc_done = 0;
1274 data->rpc_status = 0;
5138fde0 1275 data->timestamp = jiffies;
c970aa85 1276 task = rpc_run_task(&task_setup_data);
7a1218a2 1277 if (IS_ERR(task))
cdd4e68b 1278 return PTR_ERR(task);
cdd4e68b
TM		 1279 status = nfs4_wait_for_completion_rpc_task(task);
1280 if (status != 0) {
1281 data->cancelled = 1;
1282 smp_wmb();
1283 } else
1284 status = data->rpc_status;
e6b3c4db 1285 rpc_put_task(task);
1da177e4
LT		 1286 return status;
1287}
1288
24ac23ab 1289static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1290{
24ac23ab
TM		 1291 struct nfs4_opendata *data = calldata;
1292 struct nfs4_state_owner *sp = data->owner;
5138fde0 1293
24ac23ab
TM		 1294 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1295 return;
aac00a8d
TM		 1296 /*
1297 * Check if we still need to send an OPEN call, or if we can use
1298 * a delegation instead.
1299 */
1300 if (data->state != NULL) {
1301 struct nfs_delegation *delegation;
1302
dc0b027d 1303 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1304 goto out_no_action;
aac00a8d
TM		 1305 rcu_read_lock();
1306 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1307 if (delegation != NULL &&
15c831bf 1308 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1309 rcu_read_unlock();
6ee41268 1310 goto out_no_action;
aac00a8d
TM		 1311 }
1312 rcu_read_unlock();
1313 }
24ac23ab 1314 /* Update sequence id. */
9f958ab8 1315 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1316 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1317 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1318 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1319 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1320 }
26e976a8 1321 data->timestamp = jiffies;
d898528c
AA		 1322 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1323 &data->o_arg.seq_args,
1324 &data->o_res.seq_res, 1, task))
1325 return;
5138fde0 1326 rpc_call_start(task);
6ee41268
TM		 1327 return;
1328out_no_action:
1329 task->tk_action = NULL;
1330
24ac23ab 1331}
1da177e4 1332
24ac23ab
TM		 1333static void nfs4_open_done(struct rpc_task *task, void *calldata)
1334{
1335 struct nfs4_opendata *data = calldata;
1da177e4 1336
24ac23ab 1337 data->rpc_status = task->tk_status;
d898528c
AA		 1338
1339 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1340 task->tk_status);
1341
24ac23ab
TM		 1342 if (RPC_ASSASSINATED(task))
1343 return;
1344 if (task->tk_status == 0) {
1345 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1346 case S_IFREG:
1347 break;
1348 case S_IFLNK:
24ac23ab 1349 data->rpc_status = -ELOOP;
6f926b5b
TM		 1350 break;
1351 case S_IFDIR:
24ac23ab 1352 data->rpc_status = -EISDIR;
6f926b5b
TM		 1353 break;
1354 default:
24ac23ab 1355 data->rpc_status = -ENOTDIR;
6f926b5b 1356 }
26e976a8 1357 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1358 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1359 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1360 }
3e309914 1361 data->rpc_done = 1;
24ac23ab 1362}
6f926b5b 1363
24ac23ab
TM		 1364static void nfs4_open_release(void *calldata)
1365{
1366 struct nfs4_opendata *data = calldata;
1367 struct nfs4_state *state = NULL;
1368
1369 /* If this request hasn't been cancelled, do nothing */
1370 if (data->cancelled == 0)
1371 goto out_free;
1372 /* In case of error, no cleanup! */
3e309914 1373 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1374 goto out_free;
1375 /* In case we need an open_confirm, no cleanup! */
1376 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1377 goto out_free;
24ac23ab 1378 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1379 if (!IS_ERR(state))
dc0b027d 1380 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1381out_free:
c6d00e63 1382 nfs4_opendata_put(data);
24ac23ab
TM		 1383}
1384
1385static const struct rpc_call_ops nfs4_open_ops = {
1386 .rpc_call_prepare = nfs4_open_prepare,
1387 .rpc_call_done = nfs4_open_done,
1388 .rpc_release = nfs4_open_release,
1389};
1390
1391/*
1392 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1393 */
1394static int _nfs4_proc_open(struct nfs4_opendata *data)
1395{
1396 struct inode *dir = data->dir->d_inode;
1397 struct nfs_server *server = NFS_SERVER(dir);
1398 struct nfs_openargs *o_arg = &data->o_arg;
1399 struct nfs_openres *o_res = &data->o_res;
1400 struct rpc_task *task;
5138fde0
TM		 1401 struct rpc_message msg = {
1402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1403 .rpc_argp = o_arg,
1404 .rpc_resp = o_res,
1405 .rpc_cred = data->owner->so_cred,
1406 };
c970aa85
TM		 1407 struct rpc_task_setup task_setup_data = {
1408 .rpc_client = server->client,
5138fde0 1409 .rpc_message = &msg,
c970aa85
TM		 1410 .callback_ops = &nfs4_open_ops,
1411 .callback_data = data,
101070ca 1412 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1413 .flags = RPC_TASK_ASYNC,
1414 };
24ac23ab
TM		 1415 int status;
1416
c6d00e63 1417 kref_get(&data->kref);
3e309914
TM		 1418 data->rpc_done = 0;
1419 data->rpc_status = 0;
2ced46c2 1420 data->cancelled = 0;
c970aa85 1421 task = rpc_run_task(&task_setup_data);
7a1218a2 1422 if (IS_ERR(task))
24ac23ab 1423 return PTR_ERR(task);
24ac23ab
TM		 1424 status = nfs4_wait_for_completion_rpc_task(task);
1425 if (status != 0) {
1426 data->cancelled = 1;
1427 smp_wmb();
1428 } else
1429 status = data->rpc_status;
e6b3c4db 1430 rpc_put_task(task);
3e309914 1431 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1432 return status;
1433
9936781d
TM		 1434 if (o_res->fh.size == 0)
1435 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1436
56ae19f3
TM		 1437 if (o_arg->open_flags & O_CREAT) {
1438 update_changeattr(dir, &o_res->cinfo);
1439 nfs_post_op_update_inode(dir, o_res->dir_attr);
1440 } else
1441 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1442 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1443 status = _nfs4_proc_open_confirm(data);
1da177e4 1444 if (status != 0)
24ac23ab 1445 return status;
1da177e4
LT		 1446 }
1447 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1448 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1449 return 0;
1da177e4
LT		 1450}
1451
10afec90 1452static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1453{
7539bbab 1454 struct nfs_client *clp = server->nfs_client;
a78cb57a 1455 unsigned int loop;
6b30954e 1456 int ret;
58d9714a 1457
a78cb57a 1458 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1459 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1460 if (ret != 0)
a78cb57a 1461 break;
e598d843
TM		 1462 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1463 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1464 break;
58d9714a 1465 nfs4_schedule_state_recovery(clp);
a78cb57a 1466 ret = -EIO;
6b30954e 1467 }
a78cb57a 1468 return ret;
58d9714a
TM		 1469}
1470
1da177e4
LT		 1471/*
1472 * OPEN_EXPIRED:
1473 * reclaim state on the server after a network partition.
1474 * Assumes caller holds the appropriate lock
1475 */
539cd03a 1476static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1477{
e56e0b78 1478 struct nfs4_opendata *opendata;
864472e9 1479 int ret;
1da177e4 1480
6f220ed5
TM		 1481 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1482 if (IS_ERR(opendata))
1483 return PTR_ERR(opendata);
864472e9 1484 ret = nfs4_open_recover(opendata, state);
35d05778 1485 if (ret == -ESTALE)
539cd03a 1486 d_drop(ctx->path.dentry);
c6d00e63 1487 nfs4_opendata_put(opendata);
864472e9 1488 return ret;
1da177e4
LT		 1489}
1490
539cd03a 1491static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1492{
539cd03a 1493 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1494 struct nfs4_exception exception = { };
1495 int err;
1496
1497 do {
539cd03a 1498 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1499 if (err != -NFS4ERR_DELAY)
1500 break;
1501 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1502 } while (exception.retry);
1503 return err;
1504}
1505
1da177e4
LT		 1506static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1507{
1da177e4 1508 struct nfs_open_context *ctx;
864472e9 1509 int ret;
1da177e4 1510
864472e9
TM		 1511 ctx = nfs4_state_find_open_context(state);
1512 if (IS_ERR(ctx))
1513 return PTR_ERR(ctx);
539cd03a 1514 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1515 put_nfs_open_context(ctx);
1516 return ret;
1da177e4
LT		 1517}
1518
aa53ed54
JL		 1519/*
1520 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1521 * fields corresponding to attributes that were used to store the verifier.
1522 * Make sure we clobber those fields in the later setattr call
1523 */
1524static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1525{
1526 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1527 !(sattr->ia_valid & ATTR_ATIME_SET))
1528 sattr->ia_valid |= ATTR_ATIME;
1529
1530 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1531 !(sattr->ia_valid & ATTR_MTIME_SET))
1532 sattr->ia_valid |= ATTR_MTIME;
1533}
1534
1da177e4 1535/*
24ac23ab 1536 * Returns a referenced nfs4_state
1da177e4 1537 */
dc0b027d 1538static 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		 1539{
1540 struct nfs4_state_owner *sp;
1541 struct nfs4_state *state = NULL;
1542 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1543 struct nfs4_opendata *opendata;
aac00a8d 1544 int status;
1da177e4
LT		 1545
1546 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1547 status = -ENOMEM;
1548 if (!(sp = nfs4_get_state_owner(server, cred))) {
1549 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1550 goto out_err;
1551 }
58d9714a
TM		 1552 status = nfs4_recover_expired_lease(server);
1553 if (status != 0)
b4454fe1 1554 goto err_put_state_owner;
aac00a8d 1555 if (path->dentry->d_inode != NULL)
dc0b027d 1556 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1557 status = -ENOMEM;
dc0b027d 1558 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1559 if (opendata == NULL)
95d35cb4 1560 goto err_put_state_owner;
1da177e4 1561
aac00a8d
TM		 1562 if (path->dentry->d_inode != NULL)
1563 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1564
24ac23ab 1565 status = _nfs4_proc_open(opendata);
1da177e4 1566 if (status != 0)
c6d00e63 1567 goto err_opendata_put;
1da177e4 1568
aa53ed54
JL		 1569 if (opendata->o_arg.open_flags & O_EXCL)
1570 nfs4_exclusive_attrset(opendata, sattr);
1571
24ac23ab 1572 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1573 status = PTR_ERR(state);
1574 if (IS_ERR(state))
c6d00e63 1575 goto err_opendata_put;
c6d00e63 1576 nfs4_opendata_put(opendata);
1da177e4 1577 nfs4_put_state_owner(sp);
1da177e4
LT		 1578 *res = state;
1579 return 0;
c6d00e63
TM		 1580err_opendata_put:
1581 nfs4_opendata_put(opendata);
e56e0b78
TM		 1582err_put_state_owner:
1583 nfs4_put_state_owner(sp);
1da177e4 1584out_err:
1da177e4
LT		 1585 *res = NULL;
1586 return status;
1587}
1588
1589
dc0b027d 1590static 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		 1591{
1592 struct nfs4_exception exception = { };
1593 struct nfs4_state *res;
1594 int status;
1595
1596 do {
dc0b027d 1597 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1598 if (status == 0)
1599 break;
1600 /* NOTE: BAD_SEQID means the server and client disagree about the
1601 * book-keeping w.r.t. state-changing operations
1602 * (OPEN/CLOSE/LOCK/LOCKU...)
1603 * It is actually a sign of a bug on the client or on the server.
1604 *
1605 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1606 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1607 * have unhashed the old state_owner for us, and that we can
1608 * therefore safely retry using a new one. We should still warn
1609 * the user though...
1610 */
1611 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1612 printk(KERN_WARNING "NFS: v4 server %s "
1613 " returned a bad sequence-id error!\n",
1614 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1615 exception.retry = 1;
1616 continue;
1617 }
550f5747
TM		 1618 /*
1619 * BAD_STATEID on OPEN means that the server cancelled our
1620 * state before it received the OPEN_CONFIRM.
1621 * Recover by retrying the request as per the discussion
1622 * on Page 181 of RFC3530.
1623 */
1624 if (status == -NFS4ERR_BAD_STATEID) {
1625 exception.retry = 1;
1626 continue;
1627 }
aac00a8d
TM		 1628 if (status == -EAGAIN) {
1629 /* We must have found a delegation */
1630 exception.retry = 1;
1631 continue;
1632 }
1da177e4
LT		 1633 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1634 status, &exception));
1635 } while (exception.retry);
1636 return res;
1637}
1638
659bfcd6
TM		 1639static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1640 struct nfs_fattr *fattr, struct iattr *sattr,
1641 struct nfs4_state *state)
1da177e4 1642{
3e4f6290 1643 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1644 struct nfs_setattrargs arg = {
3e4f6290 1645 .fh = NFS_FH(inode),
1da177e4
LT		 1646 .iap = sattr,
1647 .server = server,
1648 .bitmask = server->attr_bitmask,
1649 };
1650 struct nfs_setattrres res = {
1651 .fattr = fattr,
1652 .server = server,
1653 };
1654 struct rpc_message msg = {
659bfcd6
TM		 1655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1656 .rpc_argp = &arg,
1657 .rpc_resp = &res,
1658 .rpc_cred = cred,
1da177e4 1659 };
26e976a8 1660 unsigned long timestamp = jiffies;
65e4308d 1661 int status;
1da177e4 1662
0e574af1 1663 nfs_fattr_init(fattr);
1da177e4 1664
3e4f6290
TM		 1665 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1666 /* Use that stateid */
1667 } else if (state != NULL) {
08e9eac4
TM		 1668 nfs4_copy_stateid(&arg.stateid, state, current->files);
1669 } else
1da177e4
LT		 1670 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1671
cccef3b9 1672 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1673 if (status == 0 && state != NULL)
1674 renew_lease(server, timestamp);
65e4308d 1675 return status;
1da177e4
LT		 1676}
1677
659bfcd6
TM		 1678static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1679 struct nfs_fattr *fattr, struct iattr *sattr,
1680 struct nfs4_state *state)
1da177e4 1681{
3e4f6290 1682 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1683 struct nfs4_exception exception = { };
1684 int err;
1685 do {
1686 err = nfs4_handle_exception(server,
659bfcd6 1687 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1688 &exception);
1689 } while (exception.retry);
1690 return err;
1691}
1692
1693struct nfs4_closedata {
4a35bd41 1694 struct path path;
1da177e4
LT		 1695 struct inode *inode;
1696 struct nfs4_state *state;
1697 struct nfs_closeargs arg;
1698 struct nfs_closeres res;
516a6af6 1699 struct nfs_fattr fattr;
26e976a8 1700 unsigned long timestamp;
1da177e4
LT		 1701};
1702
963d8fe5 1703static void nfs4_free_closedata(void *data)
9512135d 1704{
963d8fe5
TM		 1705 struct nfs4_closedata *calldata = data;
1706 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1707
1708 nfs4_put_open_state(calldata->state);
1709 nfs_free_seqid(calldata->arg.seqid);
9512135d 1710 nfs4_put_state_owner(sp);
31f31db1 1711 path_put(&calldata->path);
9512135d
TM		 1712 kfree(calldata);
1713}
1714
963d8fe5 1715static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1716{
963d8fe5 1717 struct nfs4_closedata *calldata = data;
1da177e4 1718 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1719 struct nfs_server *server = NFS_SERVER(calldata->inode);
1720
19ddab06 1721 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1722 if (RPC_ASSASSINATED(task))
1723 return;
1da177e4
LT		 1724 /* hmm. we are done with the inode, and in the process of freeing
1725 * the state_owner. we keep this around to process errors
1726 */
1da177e4
LT		 1727 switch (task->tk_status) {
1728 case 0:
45328c35 1729 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1730 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1731 break;
1732 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1733 case -NFS4ERR_OLD_STATEID:
1734 case -NFS4ERR_BAD_STATEID:
1da177e4 1735 case -NFS4ERR_EXPIRED:
dc0b027d 1736 if (calldata->arg.fmode == 0)
9e33bed5 1737 break;
1da177e4 1738 default:
9e33bed5 1739 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1740 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1741 return;
1742 }
1743 }
19ddab06 1744 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1745 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1746}
1747
4ce70ada 1748static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1749{
4ce70ada 1750 struct nfs4_closedata *calldata = data;
9512135d 1751 struct nfs4_state *state = calldata->state;
003707c7 1752 int clear_rd, clear_wr, clear_rdwr;
9512135d 1753
963d8fe5 1754 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1755 return;
003707c7 1756
003707c7 1757 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1758 spin_lock(&state->owner->so_lock);
003707c7 1759 /* Calculate the change in open mode */
e7616923 1760 if (state->n_rdwr == 0) {
003707c7 1761 if (state->n_rdonly == 0) {
003707c7
TM		 1762 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1763 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1764 }
1765 if (state->n_wronly == 0) {
003707c7
TM		 1766 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1767 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1768 }
e7616923 1769 }
4cecb76f 1770 spin_unlock(&state->owner->so_lock);
003707c7 1771 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1772 /* Note: exit _without_ calling nfs4_close_done */
1773 task->tk_action = NULL;
9512135d
TM		 1774 return;
1775 }
516a6af6 1776 nfs_fattr_init(calldata->res.fattr);
45328c35 1777 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1778 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1779 calldata->arg.fmode = FMODE_READ;
45328c35 1780 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1781 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1782 calldata->arg.fmode = FMODE_WRITE;
45328c35 1783 }
26e976a8 1784 calldata->timestamp = jiffies;
19ddab06
AA		 1785 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1786 &calldata->arg.seq_args, &calldata->res.seq_res,
1787 1, task))
1788 return;
5138fde0 1789 rpc_call_start(task);
1da177e4
LT		 1790}
1791
963d8fe5 1792static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1793 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1794 .rpc_call_done = nfs4_close_done,
1795 .rpc_release = nfs4_free_closedata,
1796};
1797
1da177e4
LT		 1798/*
1799 * It is possible for data to be read/written from a mem-mapped file
1800 * after the sys_close call (which hits the vfs layer as a flush).
1801 * This means that we can't safely call nfsv4 close on a file until
1802 * the inode is cleared. This in turn means that we are not good
1803 * NFSv4 citizens - we do not indicate to the server to update the file's
1804 * share state even when we are done with one of the three share
1805 * stateid's in the inode.
1806 *
1807 * NOTE: Caller must be holding the sp->so_owner semaphore!
1808 */
a49c3c77 1809int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1810{
4a35bd41 1811 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1812 struct nfs4_closedata *calldata;
b39e625b
TM		 1813 struct nfs4_state_owner *sp = state->owner;
1814 struct rpc_task *task;
5138fde0
TM		 1815 struct rpc_message msg = {
1816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1817 .rpc_cred = state->owner->so_cred,
1818 };
c970aa85
TM		 1819 struct rpc_task_setup task_setup_data = {
1820 .rpc_client = server->client,
5138fde0 1821 .rpc_message = &msg,
c970aa85 1822 .callback_ops = &nfs4_close_ops,
101070ca 1823 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1824 .flags = RPC_TASK_ASYNC,
1825 };
9512135d 1826 int status = -ENOMEM;
1da177e4 1827
19ddab06 1828 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1829 if (calldata == NULL)
9512135d 1830 goto out;
4a35bd41 1831 calldata->inode = state->inode;
1da177e4 1832 calldata->state = state;
4a35bd41 1833 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1834 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1835 if (nfs4_has_session(server->nfs_client))
1836 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1837 /* Serialization for the sequence id */
cee54fc9 1838 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1839 if (calldata->arg.seqid == NULL)
1840 goto out_free_calldata;
dc0b027d 1841 calldata->arg.fmode = 0;
a65318bf 1842 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1843 calldata->res.fattr = &calldata->fattr;
c1d51931 1844 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1845 calldata->res.server = server;
5f7dbd5c 1846 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1847 calldata->path.mnt = mntget(path->mnt);
1848 calldata->path.dentry = dget(path->dentry);
9512135d 1849
5138fde0
TM		 1850 msg.rpc_argp = &calldata->arg,
1851 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1852 task_setup_data.callback_data = calldata;
1853 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1854 if (IS_ERR(task))
1855 return PTR_ERR(task);
a49c3c77
TM		 1856 status = 0;
1857 if (wait)
1858 status = rpc_wait_for_completion_task(task);
b39e625b 1859 rpc_put_task(task);
a49c3c77 1860 return status;
9512135d
TM		 1861out_free_calldata:
1862 kfree(calldata);
1863out:
b39e625b
TM		 1864 nfs4_put_open_state(state);
1865 nfs4_put_state_owner(sp);
9512135d 1866 return status;
1da177e4
LT		 1867}
1868
dc0b027d 1869static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1870{
1871 struct file *filp;
1b45c46c 1872 int ret;
02a913a7 1873
1b45c46c 1874 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1875 if (fmode & FMODE_EXEC) {
af22f94a 1876 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1877 state->owner->so_cred,
1878 nd->intent.open.flags);
1879 if (ret < 0)
1880 goto out_close;
1881 }
4a35bd41 1882 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1883 if (!IS_ERR(filp)) {
1884 struct nfs_open_context *ctx;
cd3758e3 1885 ctx = nfs_file_open_context(filp);
02a913a7 1886 ctx->state = state;
95cf959b
TM		 1887 return 0;
1888 }
1b45c46c
TM		 1889 ret = PTR_ERR(filp);
1890out_close:
dc0b027d 1891 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1892 return ret;
02a913a7
TM		 1893}
1894
1895struct dentry *
1da177e4
LT		 1896nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1897{
ad389da7 1898 struct path path = {
4ac91378 1899 .mnt = nd->path.mnt,
ad389da7
TM		 1900 .dentry = dentry,
1901 };
4ac91378 1902 struct dentry *parent;
1da177e4
LT		 1903 struct iattr attr;
1904 struct rpc_cred *cred;
1905 struct nfs4_state *state;
02a913a7 1906 struct dentry *res;
dc0b027d 1907 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1908
1909 if (nd->flags & LOOKUP_CREATE) {
1910 attr.ia_mode = nd->intent.open.create_mode;
1911 attr.ia_valid = ATTR_MODE;
1912 if (!IS_POSIXACL(dir))
ce3b0f8d 1913 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1914 } else {
1915 attr.ia_valid = 0;
1916 BUG_ON(nd->intent.open.flags & O_CREAT);
1917 }
1918
98a8e323 1919 cred = rpc_lookup_cred();
1da177e4 1920 if (IS_ERR(cred))
02a913a7 1921 return (struct dentry *)cred;
565277f6
TM		 1922 parent = dentry->d_parent;
1923 /* Protect against concurrent sillydeletes */
1924 nfs_block_sillyrename(parent);
dc0b027d 1925 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1926 put_rpccred(cred);
02a913a7 1927 if (IS_ERR(state)) {
d75340cc 1928 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1929 d_add(dentry, NULL);
d75340cc
TM		 1930 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1931 }
565277f6 1932 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1933 return (struct dentry *)state;
1934 }
24ac23ab 1935 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1936 if (res != NULL)
deee9369 1937 path.dentry = res;
d75340cc 1938 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1939 nfs_unblock_sillyrename(parent);
dc0b027d 1940 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1941 return res;
1da177e4
LT		 1942}
1943
1944int
02a913a7 1945nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1946{
ad389da7 1947 struct path path = {
4ac91378 1948 .mnt = nd->path.mnt,
ad389da7
TM		 1949 .dentry = dentry,
1950 };
1da177e4
LT		 1951 struct rpc_cred *cred;
1952 struct nfs4_state *state;
dc0b027d 1953 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1954
98a8e323 1955 cred = rpc_lookup_cred();
1da177e4
LT		 1956 if (IS_ERR(cred))
1957 return PTR_ERR(cred);
dc0b027d 1958 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1959 put_rpccred(cred);
02a913a7
TM		 1960 if (IS_ERR(state)) {
1961 switch (PTR_ERR(state)) {
1962 case -EPERM:
1963 case -EACCES:
1964 case -EDQUOT:
1965 case -ENOSPC:
1966 case -EROFS:
1967 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1968 return 1;
b87c0adf
CL		 1969 default:
1970 goto out_drop;
02a913a7 1971 }
02a913a7 1972 }
24ac23ab 1973 if (state->inode == dentry->d_inode) {
d75340cc 1974 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1975 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1976 return 1;
1977 }
dc0b027d 1978 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1979out_drop:
1980 d_drop(dentry);
1da177e4
LT		 1981 return 0;
1982}
1983
7fe5c398
TM		 1984void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1985{
1986 if (ctx->state == NULL)
1987 return;
1988 if (is_sync)
1989 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1990 else
1991 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1992}
1da177e4
LT		 1993
1994static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1995{
43652ad5
BH		 1996 struct nfs4_server_caps_arg args = {
1997 .fhandle = fhandle,
1998 };
1da177e4
LT		 1999 struct nfs4_server_caps_res res = {};
2000 struct rpc_message msg = {
2001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2002 .rpc_argp = &args,
1da177e4
LT		 2003 .rpc_resp = &res,
2004 };
2005 int status;
2006
cccef3b9 2007 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2008 if (status == 0) {
2009 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2010 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2011 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2012 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2013 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2014 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2015 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2016 server->caps |= NFS_CAP_ACLS;
2017 if (res.has_links != 0)
2018 server->caps |= NFS_CAP_HARDLINKS;
2019 if (res.has_symlinks != 0)
2020 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2021 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2022 server->caps |= NFS_CAP_FILEID;
2023 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2024 server->caps |= NFS_CAP_MODE;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2026 server->caps |= NFS_CAP_NLINK;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2028 server->caps |= NFS_CAP_OWNER;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2030 server->caps |= NFS_CAP_OWNER_GROUP;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2032 server->caps |= NFS_CAP_ATIME;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2034 server->caps |= NFS_CAP_CTIME;
2035 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2036 server->caps |= NFS_CAP_MTIME;
2037
a65318bf
TM		 2038 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2039 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2040 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2041 server->acl_bitmask = res.acl_bitmask;
2042 }
cccef3b9 2043
1da177e4
LT		 2044 return status;
2045}
2046
55a97593 2047int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2048{
2049 struct nfs4_exception exception = { };
2050 int err;
2051 do {
2052 err = nfs4_handle_exception(server,
2053 _nfs4_server_capabilities(server, fhandle),
2054 &exception);
2055 } while (exception.retry);
2056 return err;
2057}
2058
2059static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2060 struct nfs_fsinfo *info)
2061{
1da177e4
LT		 2062 struct nfs4_lookup_root_arg args = {
2063 .bitmask = nfs4_fattr_bitmap,
2064 };
2065 struct nfs4_lookup_res res = {
2066 .server = server,
0e574af1 2067 .fattr = info->fattr,
1da177e4
LT		 2068 .fh = fhandle,
2069 };
2070 struct rpc_message msg = {
2071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2072 .rpc_argp = &args,
2073 .rpc_resp = &res,
2074 };
008f55d0 2075
0e574af1 2076 nfs_fattr_init(info->fattr);
fccba804 2077 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2078}
2079
2080static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2081 struct nfs_fsinfo *info)
2082{
2083 struct nfs4_exception exception = { };
2084 int err;
2085 do {
2086 err = nfs4_handle_exception(server,
2087 _nfs4_lookup_root(server, fhandle, info),
2088 &exception);
2089 } while (exception.retry);
2090 return err;
2091}
2092
54ceac45
DH		 2093/*
2094 * get the file handle for the "/" directory on the server
2095 */
1da177e4 2096static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2097 struct nfs_fsinfo *info)
1da177e4 2098{
1da177e4
LT		 2099 int status;
2100
1da177e4 2101 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2102 if (status == 0)
2103 status = nfs4_server_capabilities(server, fhandle);
2104 if (status == 0)
2105 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2106 return nfs4_map_errors(status);
1da177e4
LT		 2107}
2108
6b97fd3d
MN		 2109/*
2110 * Get locations and (maybe) other attributes of a referral.
2111 * Note that we'll actually follow the referral later when
2112 * we detect fsid mismatch in inode revalidation
2113 */
56659e99 2114static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2115{
2116 int status = -ENOMEM;
2117 struct page *page = NULL;
2118 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2119
2120 page = alloc_page(GFP_KERNEL);
2121 if (page == NULL)
2122 goto out;
2123 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2124 if (locations == NULL)
2125 goto out;
2126
c228fd3a 2127 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2128 if (status != 0)
2129 goto out;
2130 /* Make sure server returned a different fsid for the referral */
2131 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2132 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2133 status = -EIO;
2134 goto out;
2135 }
2136
2137 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2138 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2139 if (!fattr->mode)
2140 fattr->mode = S_IFDIR;
2141 memset(fhandle, 0, sizeof(struct nfs_fh));
2142out:
2143 if (page)
2144 __free_page(page);
2145 if (locations)
2146 kfree(locations);
2147 return status;
2148}
2149
1da177e4
LT		 2150static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2151{
2152 struct nfs4_getattr_arg args = {
2153 .fh = fhandle,
2154 .bitmask = server->attr_bitmask,
2155 };
2156 struct nfs4_getattr_res res = {
2157 .fattr = fattr,
2158 .server = server,
2159 };
2160 struct rpc_message msg = {
2161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2162 .rpc_argp = &args,
2163 .rpc_resp = &res,
2164 };
2165
0e574af1 2166 nfs_fattr_init(fattr);
cccef3b9 2167 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2168}
2169
2170static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2171{
2172 struct nfs4_exception exception = { };
2173 int err;
2174 do {
2175 err = nfs4_handle_exception(server,
2176 _nfs4_proc_getattr(server, fhandle, fattr),
2177 &exception);
2178 } while (exception.retry);
2179 return err;
2180}
2181
2182/*
2183 * The file is not closed if it is opened due to the a request to change
2184 * the size of the file. The open call will not be needed once the
2185 * VFS layer lookup-intents are implemented.
2186 *
2187 * Close is called when the inode is destroyed.
2188 * If we haven't opened the file for O_WRONLY, we
2189 * need to in the size_change case to obtain a stateid.
2190 *
2191 * Got race?
2192 * Because OPEN is always done by name in nfsv4, it is
2193 * possible that we opened a different file by the same
2194 * name. We can recognize this race condition, but we
2195 * can't do anything about it besides returning an error.
2196 *
2197 * This will be fixed with VFS changes (lookup-intent).
2198 */
2199static int
2200nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2201 struct iattr *sattr)
2202{
08e9eac4 2203 struct inode *inode = dentry->d_inode;
659bfcd6 2204 struct rpc_cred *cred = NULL;
d530838b 2205 struct nfs4_state *state = NULL;
1da177e4
LT		 2206 int status;
2207
0e574af1 2208 nfs_fattr_init(fattr);
1da177e4 2209
d530838b 2210 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2211 if (sattr->ia_valid & ATTR_FILE) {
2212 struct nfs_open_context *ctx;
2213
2214 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2215 if (ctx) {
2216 cred = ctx->cred;
2217 state = ctx->state;
2218 }
659bfcd6 2219 }
08e9eac4 2220
659bfcd6 2221 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2222 if (status == 0)
2223 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2224 return status;
2225}
2226
56659e99
TM		 2227static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2228 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2229 struct nfs_fattr *fattr)
2230{
2231 int status;
2232 struct nfs4_lookup_arg args = {
2233 .bitmask = server->attr_bitmask,
2234 .dir_fh = dirfh,
2235 .name = name,
2236 };
2237 struct nfs4_lookup_res res = {
2238 .server = server,
2239 .fattr = fattr,
2240 .fh = fhandle,
2241 };
2242 struct rpc_message msg = {
2243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2244 .rpc_argp = &args,
2245 .rpc_resp = &res,
2246 };
2247
2248 nfs_fattr_init(fattr);
2249
2250 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2251 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2252 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2253 return status;
2254}
2255
2256static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2257 struct qstr *name, struct nfs_fh *fhandle,
2258 struct nfs_fattr *fattr)
2259{
2260 struct nfs4_exception exception = { };
2261 int err;
2262 do {
4e56e082
TM		 2263 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2264 /* FIXME: !!!! */
2265 if (err == -NFS4ERR_MOVED) {
2266 err = -EREMOTE;
2267 break;
2268 }
2269 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2270 } while (exception.retry);
2271 return err;
2272}
2273
56659e99 2274static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2275 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2276{
4e56e082 2277 int status;
1da177e4
LT		 2278
2279 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2280 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2281 if (status == -NFS4ERR_MOVED)
2282 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2283 dprintk("NFS reply lookup: %d\n", status);
2284 return status;
2285}
2286
2287static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2288{
2289 struct nfs4_exception exception = { };
2290 int err;
2291 do {
2292 err = nfs4_handle_exception(NFS_SERVER(dir),
2293 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2294 &exception);
2295 } while (exception.retry);
2296 return err;
2297}
2298
2299static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2300{
76b32999
TM		 2301 struct nfs_server *server = NFS_SERVER(inode);
2302 struct nfs_fattr fattr;
1da177e4
LT		 2303 struct nfs4_accessargs args = {
2304 .fh = NFS_FH(inode),
76b32999
TM		 2305 .bitmask = server->attr_bitmask,
2306 };
2307 struct nfs4_accessres res = {
2308 .server = server,
2309 .fattr = &fattr,
1da177e4 2310 };
1da177e4
LT		 2311 struct rpc_message msg = {
2312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2313 .rpc_argp = &args,
2314 .rpc_resp = &res,
2315 .rpc_cred = entry->cred,
2316 };
2317 int mode = entry->mask;
2318 int status;
2319
2320 /*
2321 * Determine which access bits we want to ask for...
2322 */
2323 if (mode & MAY_READ)
2324 args.access |= NFS4_ACCESS_READ;
2325 if (S_ISDIR(inode->i_mode)) {
2326 if (mode & MAY_WRITE)
2327 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2328 if (mode & MAY_EXEC)
2329 args.access |= NFS4_ACCESS_LOOKUP;
2330 } else {
2331 if (mode & MAY_WRITE)
2332 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2333 if (mode & MAY_EXEC)
2334 args.access |= NFS4_ACCESS_EXECUTE;
2335 }
76b32999 2336 nfs_fattr_init(&fattr);
cccef3b9 2337 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2338 if (!status) {
2339 entry->mask = 0;
2340 if (res.access & NFS4_ACCESS_READ)
2341 entry->mask |= MAY_READ;
2342 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2343 entry->mask |= MAY_WRITE;
2344 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2345 entry->mask |= MAY_EXEC;
76b32999 2346 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2347 }
2348 return status;
2349}
2350
2351static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2352{
2353 struct nfs4_exception exception = { };
2354 int err;
2355 do {
2356 err = nfs4_handle_exception(NFS_SERVER(inode),
2357 _nfs4_proc_access(inode, entry),
2358 &exception);
2359 } while (exception.retry);
2360 return err;
2361}
2362
2363/*
2364 * TODO: For the time being, we don't try to get any attributes
2365 * along with any of the zero-copy operations READ, READDIR,
2366 * READLINK, WRITE.
2367 *
2368 * In the case of the first three, we want to put the GETATTR
2369 * after the read-type operation -- this is because it is hard
2370 * to predict the length of a GETATTR response in v4, and thus
2371 * align the READ data correctly. This means that the GETATTR
2372 * may end up partially falling into the page cache, and we should
2373 * shift it into the 'tail' of the xdr_buf before processing.
2374 * To do this efficiently, we need to know the total length
2375 * of data received, which doesn't seem to be available outside
2376 * of the RPC layer.
2377 *
2378 * In the case of WRITE, we also want to put the GETATTR after
2379 * the operation -- in this case because we want to make sure
2380 * we get the post-operation mtime and size. This means that
2381 * we can't use xdr_encode_pages() as written: we need a variant
2382 * of it which would leave room in the 'tail' iovec.
2383 *
2384 * Both of these changes to the XDR layer would in fact be quite
2385 * minor, but I decided to leave them for a subsequent patch.
2386 */
2387static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2388 unsigned int pgbase, unsigned int pglen)
2389{
2390 struct nfs4_readlink args = {
2391 .fh = NFS_FH(inode),
2392 .pgbase = pgbase,
2393 .pglen = pglen,
2394 .pages = &page,
2395 };
f50c7000 2396 struct nfs4_readlink_res res;
1da177e4
LT		 2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2399 .rpc_argp = &args,
f50c7000 2400 .rpc_resp = &res,
1da177e4
LT		 2401 };
2402
cccef3b9 2403 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2404}
2405
2406static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2407 unsigned int pgbase, unsigned int pglen)
2408{
2409 struct nfs4_exception exception = { };
2410 int err;
2411 do {
2412 err = nfs4_handle_exception(NFS_SERVER(inode),
2413 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2414 &exception);
2415 } while (exception.retry);
2416 return err;
2417}
2418
1da177e4
LT		 2419/*
2420 * Got race?
2421 * We will need to arrange for the VFS layer to provide an atomic open.
2422 * Until then, this create/open method is prone to inefficiency and race
2423 * conditions due to the lookup, create, and open VFS calls from sys_open()
2424 * placed on the wire.
2425 *
2426 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2427 * The file will be opened again in the subsequent VFS open call
2428 * (nfs4_proc_file_open).
2429 *
2430 * The open for read will just hang around to be used by any process that
2431 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2432 */
2433
2434static int
2435nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2436 int flags, struct nameidata *nd)
1da177e4 2437{
ad389da7 2438 struct path path = {
4ac91378 2439 .mnt = nd->path.mnt,
ad389da7
TM		 2440 .dentry = dentry,
2441 };
1da177e4
LT		 2442 struct nfs4_state *state;
2443 struct rpc_cred *cred;
dc0b027d 2444 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2445 int status = 0;
2446
98a8e323 2447 cred = rpc_lookup_cred();
1da177e4
LT		 2448 if (IS_ERR(cred)) {
2449 status = PTR_ERR(cred);
2450 goto out;
2451 }
dc0b027d 2452 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2453 d_drop(dentry);
1da177e4
LT		 2454 if (IS_ERR(state)) {
2455 status = PTR_ERR(state);
659bfcd6 2456 goto out_putcred;
1da177e4 2457 }
d4d9cdcb 2458 d_add(dentry, igrab(state->inode));
d75340cc 2459 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2460 if (flags & O_EXCL) {
2461 struct nfs_fattr fattr;
659bfcd6 2462 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2463 if (status == 0)
65e4308d 2464 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2465 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2466 }
ad389da7 2467 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2468 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2469 else
dc0b027d 2470 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2471out_putcred:
2472 put_rpccred(cred);
1da177e4
LT		 2473out:
2474 return status;
2475}
2476
2477static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2478{
16e42959 2479 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2480 struct nfs_removeargs args = {
1da177e4 2481 .fh = NFS_FH(dir),
4fdc17b2
TM		 2482 .name.len = name->len,
2483 .name.name = name->name,
16e42959
TM		 2484 .bitmask = server->attr_bitmask,
2485 };
4fdc17b2 2486 struct nfs_removeres res = {
16e42959 2487 .server = server,
1da177e4 2488 };
1da177e4 2489 struct rpc_message msg = {
4fdc17b2
TM		 2490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2491 .rpc_argp = &args,
2492 .rpc_resp = &res,
1da177e4
LT		 2493 };
2494 int status;
2495
4fdc17b2 2496 nfs_fattr_init(&res.dir_attr);
cccef3b9 2497 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2498 if (status == 0) {
2499 update_changeattr(dir, &res.cinfo);
4fdc17b2 2500 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2501 }
1da177e4
LT		 2502 return status;
2503}
2504
2505static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 err = nfs4_handle_exception(NFS_SERVER(dir),
2511 _nfs4_proc_remove(dir, name),
2512 &exception);
2513 } while (exception.retry);
2514 return err;
2515}
2516
e4eff1a6 2517static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2518{
e4eff1a6
TM		 2519 struct nfs_server *server = NFS_SERVER(dir);
2520 struct nfs_removeargs *args = msg->rpc_argp;
2521 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2522
a65318bf 2523 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2524 res->server = server;
1da177e4 2525 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2526}
2527
e4eff1a6 2528static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2529{
e4eff1a6
TM		 2530 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2531
472cfbd9 2532 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2533 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2534 return 0;
472cfbd9 2535 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2536 update_changeattr(dir, &res->cinfo);
2537 nfs_post_op_update_inode(dir, &res->dir_attr);
2538 return 1;
1da177e4
LT		 2539}
2540
2541static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2542 struct inode *new_dir, struct qstr *new_name)
2543{
6caf2c82 2544 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2545 struct nfs4_rename_arg arg = {
2546 .old_dir = NFS_FH(old_dir),
2547 .new_dir = NFS_FH(new_dir),
2548 .old_name = old_name,
2549 .new_name = new_name,
6caf2c82
TM		 2550 .bitmask = server->attr_bitmask,
2551 };
2552 struct nfs_fattr old_fattr, new_fattr;
2553 struct nfs4_rename_res res = {
2554 .server = server,
2555 .old_fattr = &old_fattr,
2556 .new_fattr = &new_fattr,
1da177e4 2557 };
1da177e4
LT		 2558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2560 .rpc_argp = &arg,
2561 .rpc_resp = &res,
2562 };
2563 int status;
2564
6caf2c82
TM		 2565 nfs_fattr_init(res.old_fattr);
2566 nfs_fattr_init(res.new_fattr);
cccef3b9 2567 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2568
2569 if (!status) {
2570 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2571 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2572 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2573 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2574 }
2575 return status;
2576}
2577
2578static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2579 struct inode *new_dir, struct qstr *new_name)
2580{
2581 struct nfs4_exception exception = { };
2582 int err;
2583 do {
2584 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2585 _nfs4_proc_rename(old_dir, old_name,
2586 new_dir, new_name),
2587 &exception);
2588 } while (exception.retry);
2589 return err;
2590}
2591
2592static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2593{
91ba2eee 2594 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2595 struct nfs4_link_arg arg = {
2596 .fh = NFS_FH(inode),
2597 .dir_fh = NFS_FH(dir),
2598 .name = name,
91ba2eee
TM		 2599 .bitmask = server->attr_bitmask,
2600 };
2601 struct nfs_fattr fattr, dir_attr;
2602 struct nfs4_link_res res = {
2603 .server = server,
2604 .fattr = &fattr,
2605 .dir_attr = &dir_attr,
1da177e4 2606 };
1da177e4
LT		 2607 struct rpc_message msg = {
2608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2609 .rpc_argp = &arg,
91ba2eee 2610 .rpc_resp = &res,
1da177e4
LT		 2611 };
2612 int status;
2613
91ba2eee
TM		 2614 nfs_fattr_init(res.fattr);
2615 nfs_fattr_init(res.dir_attr);
cccef3b9 2616 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2617 if (!status) {
2618 update_changeattr(dir, &res.cinfo);
2619 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2620 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2621 }
1da177e4
LT		 2622
2623 return status;
2624}
2625
2626static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2627{
2628 struct nfs4_exception exception = { };
2629 int err;
2630 do {
2631 err = nfs4_handle_exception(NFS_SERVER(inode),
2632 _nfs4_proc_link(inode, dir, name),
2633 &exception);
2634 } while (exception.retry);
2635 return err;
2636}
2637
57dc9a57
TM		 2638struct nfs4_createdata {
2639 struct rpc_message msg;
2640 struct nfs4_create_arg arg;
2641 struct nfs4_create_res res;
2642 struct nfs_fh fh;
2643 struct nfs_fattr fattr;
2644 struct nfs_fattr dir_fattr;
2645};
2646
2647static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2648 struct qstr *name, struct iattr *sattr, u32 ftype)
2649{
2650 struct nfs4_createdata *data;
2651
2652 data = kzalloc(sizeof(*data), GFP_KERNEL);
2653 if (data != NULL) {
2654 struct nfs_server *server = NFS_SERVER(dir);
2655
2656 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2657 data->msg.rpc_argp = &data->arg;
2658 data->msg.rpc_resp = &data->res;
2659 data->arg.dir_fh = NFS_FH(dir);
2660 data->arg.server = server;
2661 data->arg.name = name;
2662 data->arg.attrs = sattr;
2663 data->arg.ftype = ftype;
2664 data->arg.bitmask = server->attr_bitmask;
2665 data->res.server = server;
2666 data->res.fh = &data->fh;
2667 data->res.fattr = &data->fattr;
2668 data->res.dir_fattr = &data->dir_fattr;
2669 nfs_fattr_init(data->res.fattr);
2670 nfs_fattr_init(data->res.dir_fattr);
2671 }
2672 return data;
2673}
2674
2675static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2676{
cccef3b9
AA		 2677 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2678 &data->arg, &data->res, 1);
57dc9a57
TM		 2679 if (status == 0) {
2680 update_changeattr(dir, &data->res.dir_cinfo);
2681 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2682 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2683 }
2684 return status;
2685}
2686
2687static void nfs4_free_createdata(struct nfs4_createdata *data)
2688{
2689 kfree(data);
2690}
2691
4f390c15 2692static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2693 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2694{
57dc9a57
TM		 2695 struct nfs4_createdata *data;
2696 int status = -ENAMETOOLONG;
1da177e4 2697
94a6d753 2698 if (len > NFS4_MAXPATHLEN)
57dc9a57 2699 goto out;
4f390c15 2700
57dc9a57
TM		 2701 status = -ENOMEM;
2702 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2703 if (data == NULL)
2704 goto out;
2705
2706 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2707 data->arg.u.symlink.pages = &page;
2708 data->arg.u.symlink.len = len;
1da177e4 2709
57dc9a57
TM		 2710 status = nfs4_do_create(dir, dentry, data);
2711
2712 nfs4_free_createdata(data);
2713out:
1da177e4
LT		 2714 return status;
2715}
2716
4f390c15 2717static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2718 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2719{
2720 struct nfs4_exception exception = { };
2721 int err;
2722 do {
2723 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2724 _nfs4_proc_symlink(dir, dentry, page,
2725 len, sattr),
1da177e4
LT		 2726 &exception);
2727 } while (exception.retry);
2728 return err;
2729}
2730
2731static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2732 struct iattr *sattr)
2733{
57dc9a57
TM		 2734 struct nfs4_createdata *data;
2735 int status = -ENOMEM;
1da177e4 2736
57dc9a57
TM		 2737 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2738 if (data == NULL)
2739 goto out;
2740
2741 status = nfs4_do_create(dir, dentry, data);
2742
2743 nfs4_free_createdata(data);
2744out:
1da177e4
LT		 2745 return status;
2746}
2747
2748static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2749 struct iattr *sattr)
2750{
2751 struct nfs4_exception exception = { };
2752 int err;
2753 do {
2754 err = nfs4_handle_exception(NFS_SERVER(dir),
2755 _nfs4_proc_mkdir(dir, dentry, sattr),
2756 &exception);
2757 } while (exception.retry);
2758 return err;
2759}
2760
2761static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2762 u64 cookie, struct page *page, unsigned int count, int plus)
2763{
2764 struct inode *dir = dentry->d_inode;
2765 struct nfs4_readdir_arg args = {
2766 .fh = NFS_FH(dir),
2767 .pages = &page,
2768 .pgbase = 0,
2769 .count = count,
96d25e53 2770 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2771 };
2772 struct nfs4_readdir_res res;
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2775 .rpc_argp = &args,
2776 .rpc_resp = &res,
2777 .rpc_cred = cred,
2778 };
2779 int status;
2780
3110ff80 2781 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2782 dentry->d_parent->d_name.name,
2783 dentry->d_name.name,
2784 (unsigned long long)cookie);
1da177e4
LT		 2785 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2786 res.pgbase = args.pgbase;
cccef3b9 2787 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2788 if (status == 0)
2789 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2790
2791 nfs_invalidate_atime(dir);
2792
3110ff80 2793 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2794 return status;
2795}
2796
2797static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2798 u64 cookie, struct page *page, unsigned int count, int plus)
2799{
2800 struct nfs4_exception exception = { };
2801 int err;
2802 do {
2803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2804 _nfs4_proc_readdir(dentry, cred, cookie,
2805 page, count, plus),
2806 &exception);
2807 } while (exception.retry);
2808 return err;
2809}
2810
2811static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2812 struct iattr *sattr, dev_t rdev)
2813{
57dc9a57
TM		 2814 struct nfs4_createdata *data;
2815 int mode = sattr->ia_mode;
2816 int status = -ENOMEM;
1da177e4
LT		 2817
2818 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2819 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2820
2821 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2822 if (data == NULL)
2823 goto out;
2824
1da177e4 2825 if (S_ISFIFO(mode))
57dc9a57 2826 data->arg.ftype = NF4FIFO;
1da177e4 2827 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2828 data->arg.ftype = NF4BLK;
2829 data->arg.u.device.specdata1 = MAJOR(rdev);
2830 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2831 }
2832 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2833 data->arg.ftype = NF4CHR;
2834 data->arg.u.device.specdata1 = MAJOR(rdev);
2835 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2836 }
1da177e4 2837
57dc9a57
TM		 2838 status = nfs4_do_create(dir, dentry, data);
2839
2840 nfs4_free_createdata(data);
2841out:
1da177e4
LT		 2842 return status;
2843}
2844
2845static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2846 struct iattr *sattr, dev_t rdev)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(NFS_SERVER(dir),
2852 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
2858static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2859 struct nfs_fsstat *fsstat)
2860{
2861 struct nfs4_statfs_arg args = {
2862 .fh = fhandle,
2863 .bitmask = server->attr_bitmask,
2864 };
24ad148a
BH		 2865 struct nfs4_statfs_res res = {
2866 .fsstat = fsstat,
2867 };
1da177e4
LT		 2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2870 .rpc_argp = &args,
24ad148a 2871 .rpc_resp = &res,
1da177e4
LT		 2872 };
2873
0e574af1 2874 nfs_fattr_init(fsstat->fattr);
cccef3b9 2875 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2876}
2877
2878static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2879{
2880 struct nfs4_exception exception = { };
2881 int err;
2882 do {
2883 err = nfs4_handle_exception(server,
2884 _nfs4_proc_statfs(server, fhandle, fsstat),
2885 &exception);
2886 } while (exception.retry);
2887 return err;
2888}
2889
2890static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2891 struct nfs_fsinfo *fsinfo)
2892{
2893 struct nfs4_fsinfo_arg args = {
2894 .fh = fhandle,
2895 .bitmask = server->attr_bitmask,
2896 };
3dda5e43
BH		 2897 struct nfs4_fsinfo_res res = {
2898 .fsinfo = fsinfo,
2899 };
1da177e4
LT		 2900 struct rpc_message msg = {
2901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2902 .rpc_argp = &args,
3dda5e43 2903 .rpc_resp = &res,
1da177e4
LT		 2904 };
2905
cccef3b9 2906 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2907}
2908
2909static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2910{
2911 struct nfs4_exception exception = { };
2912 int err;
2913
2914 do {
2915 err = nfs4_handle_exception(server,
2916 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2923{
0e574af1 2924 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2925 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2926}
2927
2928static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2929 struct nfs_pathconf *pathconf)
2930{
2931 struct nfs4_pathconf_arg args = {
2932 .fh = fhandle,
2933 .bitmask = server->attr_bitmask,
2934 };
d45b2989
BH		 2935 struct nfs4_pathconf_res res = {
2936 .pathconf = pathconf,
2937 };
1da177e4
LT		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2940 .rpc_argp = &args,
d45b2989 2941 .rpc_resp = &res,
1da177e4
LT		 2942 };
2943
2944 /* None of the pathconf attributes are mandatory to implement */
2945 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2946 memset(pathconf, 0, sizeof(*pathconf));
2947 return 0;
2948 }
2949
0e574af1 2950 nfs_fattr_init(pathconf->fattr);
cccef3b9 2951 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2952}
2953
2954static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_pathconf *pathconf)
2956{
2957 struct nfs4_exception exception = { };
2958 int err;
2959
2960 do {
2961 err = nfs4_handle_exception(server,
2962 _nfs4_proc_pathconf(server, fhandle, pathconf),
2963 &exception);
2964 } while (exception.retry);
2965 return err;
2966}
2967
ec06c096 2968static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2969{
ec06c096 2970 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2971
f11c88af
AA		 2972 dprintk("--> %s\n", __func__);
2973
2974 /* nfs4_sequence_free_slot called in the read rpc_call_done */
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) {
eedc020e 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 /* slot is freed in nfs_writeback_done */
2999 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3000 task->tk_status);
3001
9e33bed5 3002 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 3003 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3004 return -EAGAIN;
1da177e4 3005 }
4f9838c7 3006 if (task->tk_status >= 0) {
1da177e4 3007 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3008 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3009 }
788e7a89 3010 return 0;
1da177e4
LT		 3011}
3012
bdc7f021 3013static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3014{
bdc7f021
TM		 3015 struct nfs_server *server = NFS_SERVER(data->inode);
3016
a65318bf 3017 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3018 data->res.server = server;
1da177e4
LT		 3019 data->timestamp = jiffies;
3020
bdc7f021 3021 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3022}
3023
788e7a89 3024static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3025{
1da177e4
LT		 3026 struct inode *inode = data->inode;
3027
21d9a851
AA		 3028 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3029 task->tk_status);
9e33bed5 3030 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3031 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3032 return -EAGAIN;
1da177e4 3033 }
21d9a851
AA		 3034 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3035 &data->res.seq_res);
9e08a3c5 3036 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3037 return 0;
1da177e4
LT		 3038}
3039
bdc7f021 3040static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3041{
788e7a89 3042 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3043
a65318bf 3044 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3045 data->res.server = server;
bdc7f021 3046 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3047}
3048
3049/*
3050 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3051 * standalone procedure for queueing an asynchronous RENEW.
3052 */
963d8fe5 3053static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3054{
adfa6f98 3055 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3056 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3057
3058 if (task->tk_status < 0) {
95baa25c
TM		 3059 /* Unless we're shutting down, schedule state recovery! */
3060 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3061 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3062 return;
3063 }
3064 spin_lock(&clp->cl_lock);
3065 if (time_before(clp->cl_last_renewal,timestamp))
3066 clp->cl_last_renewal = timestamp;
3067 spin_unlock(&clp->cl_lock);
3068}
3069
963d8fe5
TM		 3070static const struct rpc_call_ops nfs4_renew_ops = {
3071 .rpc_call_done = nfs4_renew_done,
3072};
3073
adfa6f98 3074int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3075{
3076 struct rpc_message msg = {
3077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3078 .rpc_argp = clp,
b4454fe1 3079 .rpc_cred = cred,
1da177e4
LT		 3080 };
3081
3082 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3083 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3084}
3085
adfa6f98 3086int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3087{
3088 struct rpc_message msg = {
3089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3090 .rpc_argp = clp,
b4454fe1 3091 .rpc_cred = cred,
1da177e4
LT		 3092 };
3093 unsigned long now = jiffies;
3094 int status;
3095
3096 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3097 if (status < 0)
3098 return status;
3099 spin_lock(&clp->cl_lock);
3100 if (time_before(clp->cl_last_renewal,now))
3101 clp->cl_last_renewal = now;
3102 spin_unlock(&clp->cl_lock);
3103 return 0;
3104}
3105
aa1870af
BF		 3106static inline int nfs4_server_supports_acls(struct nfs_server *server)
3107{
3108 return (server->caps & NFS_CAP_ACLS)
3109 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3110 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3111}
3112
3113/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3114 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3115 * the stack.
3116 */
3117#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3118
3119static void buf_to_pages(const void *buf, size_t buflen,
3120 struct page **pages, unsigned int *pgbase)
3121{
3122 const void *p = buf;
3123
3124 *pgbase = offset_in_page(buf);
3125 p -= *pgbase;
3126 while (p < buf + buflen) {
3127 *(pages++) = virt_to_page(p);
3128 p += PAGE_CACHE_SIZE;
3129 }
3130}
3131
e50a1c2e
BF		 3132struct nfs4_cached_acl {
3133 int cached;
3134 size_t len;
3e9d4154 3135 char data[0];
e50a1c2e
BF		 3136};
3137
3138static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3139{
3140 struct nfs_inode *nfsi = NFS_I(inode);
3141
3142 spin_lock(&inode->i_lock);
3143 kfree(nfsi->nfs4_acl);
3144 nfsi->nfs4_acl = acl;
3145 spin_unlock(&inode->i_lock);
3146}
3147
3148static void nfs4_zap_acl_attr(struct inode *inode)
3149{
3150 nfs4_set_cached_acl(inode, NULL);
3151}
3152
3153static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3154{
3155 struct nfs_inode *nfsi = NFS_I(inode);
3156 struct nfs4_cached_acl *acl;
3157 int ret = -ENOENT;
3158
3159 spin_lock(&inode->i_lock);
3160 acl = nfsi->nfs4_acl;
3161 if (acl == NULL)
3162 goto out;
3163 if (buf == NULL) /* user is just asking for length */
3164 goto out_len;
3165 if (acl->cached == 0)
3166 goto out;
3167 ret = -ERANGE; /* see getxattr(2) man page */
3168 if (acl->len > buflen)
3169 goto out;
3170 memcpy(buf, acl->data, acl->len);
3171out_len:
3172 ret = acl->len;
3173out:
3174 spin_unlock(&inode->i_lock);
3175 return ret;
3176}
3177
3178static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3179{
3180 struct nfs4_cached_acl *acl;
3181
3182 if (buf && acl_len <= PAGE_SIZE) {
3183 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3184 if (acl == NULL)
3185 goto out;
3186 acl->cached = 1;
3187 memcpy(acl->data, buf, acl_len);
3188 } else {
3189 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3190 if (acl == NULL)
3191 goto out;
3192 acl->cached = 0;
3193 }
3194 acl->len = acl_len;
3195out:
3196 nfs4_set_cached_acl(inode, acl);
3197}
3198
16b4289c 3199static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3200{
aa1870af
BF		 3201 struct page *pages[NFS4ACL_MAXPAGES];
3202 struct nfs_getaclargs args = {
3203 .fh = NFS_FH(inode),
3204 .acl_pages = pages,
3205 .acl_len = buflen,
3206 };
663c79b3
BH		 3207 struct nfs_getaclres res = {
3208 .acl_len = buflen,
3209 };
e50a1c2e 3210 void *resp_buf;
aa1870af
BF		 3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3213 .rpc_argp = &args,
663c79b3 3214 .rpc_resp = &res,
aa1870af 3215 };
e50a1c2e 3216 struct page *localpage = NULL;
aa1870af
BF		 3217 int ret;
3218
e50a1c2e
BF		 3219 if (buflen < PAGE_SIZE) {
3220 /* As long as we're doing a round trip to the server anyway,
3221 * let's be prepared for a page of acl data. */
3222 localpage = alloc_page(GFP_KERNEL);
3223 resp_buf = page_address(localpage);
3224 if (localpage == NULL)
3225 return -ENOMEM;
3226 args.acl_pages[0] = localpage;
3227 args.acl_pgbase = 0;
663c79b3 3228 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3229 } else {
3230 resp_buf = buf;
3231 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3232 }
cccef3b9 3233 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3234 if (ret)
3235 goto out_free;
663c79b3
BH		 3236 if (res.acl_len > args.acl_len)
3237 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3238 else
663c79b3 3239 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3240 if (buf) {
3241 ret = -ERANGE;
663c79b3 3242 if (res.acl_len > buflen)
e50a1c2e
BF		 3243 goto out_free;
3244 if (localpage)
663c79b3 3245 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3246 }
663c79b3 3247 ret = res.acl_len;
e50a1c2e
BF		 3248out_free:
3249 if (localpage)
3250 __free_page(localpage);
aa1870af
BF		 3251 return ret;
3252}
3253
16b4289c
TM		 3254static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3255{
3256 struct nfs4_exception exception = { };
3257 ssize_t ret;
3258 do {
3259 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3260 if (ret >= 0)
3261 break;
3262 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3263 } while (exception.retry);
3264 return ret;
3265}
3266
e50a1c2e
BF		 3267static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3268{
3269 struct nfs_server *server = NFS_SERVER(inode);
3270 int ret;
3271
3272 if (!nfs4_server_supports_acls(server))
3273 return -EOPNOTSUPP;
3274 ret = nfs_revalidate_inode(server, inode);
3275 if (ret < 0)
3276 return ret;
3277 ret = nfs4_read_cached_acl(inode, buf, buflen);
3278 if (ret != -ENOENT)
3279 return ret;
3280 return nfs4_get_acl_uncached(inode, buf, buflen);
3281}
3282
16b4289c 3283static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3284{
3285 struct nfs_server *server = NFS_SERVER(inode);
3286 struct page *pages[NFS4ACL_MAXPAGES];
3287 struct nfs_setaclargs arg = {
3288 .fh = NFS_FH(inode),
3289 .acl_pages = pages,
3290 .acl_len = buflen,
3291 };
73c403a9 3292 struct nfs_setaclres res;
4b580ee3
BF		 3293 struct rpc_message msg = {
3294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3295 .rpc_argp = &arg,
73c403a9 3296 .rpc_resp = &res,
4b580ee3
BF		 3297 };
3298 int ret;
3299
3300 if (!nfs4_server_supports_acls(server))
3301 return -EOPNOTSUPP;
642ac549 3302 nfs_inode_return_delegation(inode);
4b580ee3 3303 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3304 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3305 nfs_access_zap_cache(inode);
3306 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3307 return ret;
3308}
3309
16b4289c
TM		 3310static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3311{
3312 struct nfs4_exception exception = { };
3313 int err;
3314 do {
3315 err = nfs4_handle_exception(NFS_SERVER(inode),
3316 __nfs4_proc_set_acl(inode, buf, buflen),
3317 &exception);
3318 } while (exception.retry);
3319 return err;
3320}
3321
1da177e4 3322static int
8328d59f 3323_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3324{
1da177e4
LT		 3325 if (!clp || task->tk_status >= 0)
3326 return 0;
3327 switch(task->tk_status) {
9e33bed5
TM		 3328 case -NFS4ERR_ADMIN_REVOKED:
3329 case -NFS4ERR_BAD_STATEID:
3330 case -NFS4ERR_OPENMODE:
3331 if (state == NULL)
3332 break;
3333 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3334 case -NFS4ERR_STALE_CLIENTID:
3335 case -NFS4ERR_STALE_STATEID:
3336 case -NFS4ERR_EXPIRED:
5d00837b 3337 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3338 nfs4_schedule_state_recovery(clp);
e005e804 3339 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3340 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3341 task->tk_status = 0;
3342 return -EAGAIN;
4745e315
AA		 3343#if defined(CONFIG_NFS_V4_1)
3344 case -NFS4ERR_BADSESSION:
3345 case -NFS4ERR_BADSLOT:
3346 case -NFS4ERR_BAD_HIGH_SLOT:
3347 case -NFS4ERR_DEADSESSION:
3348 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3349 case -NFS4ERR_SEQ_FALSE_RETRY:
3350 case -NFS4ERR_SEQ_MISORDERED:
3351 dprintk("%s ERROR %d, Reset session\n", __func__,
3352 task->tk_status);
3353 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3354 task->tk_status = 0;
3355 return -EAGAIN;
3356#endif /* CONFIG_NFS_V4_1 */
1da177e4 3357 case -NFS4ERR_DELAY:
8328d59f
AA		 3358 if (server)
3359 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3360 case -NFS4ERR_GRACE:
1da177e4
LT		 3361 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3362 task->tk_status = 0;
3363 return -EAGAIN;
3364 case -NFS4ERR_OLD_STATEID:
3365 task->tk_status = 0;
3366 return -EAGAIN;
3367 }
3368 task->tk_status = nfs4_map_errors(task->tk_status);
3369 return 0;
3370}
3371
8328d59f
AA		 3372static int
3373nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3374{
3375 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3376}
3377
adfa6f98 3378int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3379{
3380 nfs4_verifier sc_verifier;
3381 struct nfs4_setclientid setclientid = {
3382 .sc_verifier = &sc_verifier,
3383 .sc_prog = program,
3384 };
3385 struct rpc_message msg = {
3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3387 .rpc_argp = &setclientid,
3388 .rpc_resp = clp,
286d7d6a 3389 .rpc_cred = cred,
1da177e4 3390 };
bc4785cd 3391 __be32 *p;
1da177e4
LT		 3392 int loop = 0;
3393 int status;
3394
bc4785cd 3395 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3396 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3397 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3398
3399 for(;;) {
3400 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3401 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3402 clp->cl_ipaddr,
3403 rpc_peeraddr2str(clp->cl_rpcclient,
3404 RPC_DISPLAY_ADDR),
69dd716c
TM		 3405 rpc_peeraddr2str(clp->cl_rpcclient,
3406 RPC_DISPLAY_PROTO),
78ea323b 3407 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3408 clp->cl_id_uniquifier);
3409 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3410 sizeof(setclientid.sc_netid),
3411 rpc_peeraddr2str(clp->cl_rpcclient,
3412 RPC_DISPLAY_NETID));
1da177e4 3413 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3414 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3415 clp->cl_ipaddr, port >> 8, port & 255);
3416
3417 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3418 if (status != -NFS4ERR_CLID_INUSE)
3419 break;
3420 if (signalled())
3421 break;
3422 if (loop++ & 1)
3423 ssleep(clp->cl_lease_time + 1);
3424 else
3425 if (++clp->cl_id_uniquifier == 0)
3426 break;
3427 }
3428 return status;
3429}
3430
adfa6f98 3431static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3432{
3433 struct nfs_fsinfo fsinfo;
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3436 .rpc_argp = clp,
3437 .rpc_resp = &fsinfo,
286d7d6a 3438 .rpc_cred = cred,
1da177e4
LT		 3439 };
3440 unsigned long now;
3441 int status;
3442
3443 now = jiffies;
3444 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3445 if (status == 0) {
3446 spin_lock(&clp->cl_lock);
3447 clp->cl_lease_time = fsinfo.lease_time * HZ;
3448 clp->cl_last_renewal = now;
3449 spin_unlock(&clp->cl_lock);
3450 }
3451 return status;
3452}
3453
adfa6f98 3454int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3455{
77e03677 3456 long timeout = 0;
51581f3b
TM		 3457 int err;
3458 do {
3459 err = _nfs4_proc_setclientid_confirm(clp, cred);
3460 switch (err) {
3461 case 0:
3462 return err;
3463 case -NFS4ERR_RESOURCE:
3464 /* The IBM lawyers misread another document! */
3465 case -NFS4ERR_DELAY:
3466 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3467 }
3468 } while (err == 0);
3469 return err;
3470}
3471
fe650407
TM		 3472struct nfs4_delegreturndata {
3473 struct nfs4_delegreturnargs args;
fa178f29 3474 struct nfs4_delegreturnres res;
fe650407
TM		 3475 struct nfs_fh fh;
3476 nfs4_stateid stateid;
26e976a8 3477 unsigned long timestamp;
fa178f29 3478 struct nfs_fattr fattr;
fe650407
TM		 3479 int rpc_status;
3480};
3481
fe650407
TM		 3482static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3483{
3484 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3485
3486 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3487 task->tk_status);
3488
fe650407 3489 data->rpc_status = task->tk_status;
26e976a8 3490 if (data->rpc_status == 0)
fa178f29 3491 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3492}
3493
3494static void nfs4_delegreturn_release(void *calldata)
3495{
fe650407
TM		 3496 kfree(calldata);
3497}
3498
938e1010
AA		 3499#if defined(CONFIG_NFS_V4_1)
3500static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3501{
3502 struct nfs4_delegreturndata *d_data;
3503
3504 d_data = (struct nfs4_delegreturndata *)data;
3505
3506 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3507 &d_data->args.seq_args,
3508 &d_data->res.seq_res, 1, task))
3509 return;
3510 rpc_call_start(task);
3511}
3512#endif /* CONFIG_NFS_V4_1 */
3513
c8d149f3 3514static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3515#if defined(CONFIG_NFS_V4_1)
3516 .rpc_call_prepare = nfs4_delegreturn_prepare,
3517#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3518 .rpc_call_done = nfs4_delegreturn_done,
3519 .rpc_release = nfs4_delegreturn_release,
3520};
3521
e6f81075 3522static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3523{
3524 struct nfs4_delegreturndata *data;
fa178f29 3525 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3526 struct rpc_task *task;
5138fde0
TM		 3527 struct rpc_message msg = {
3528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3529 .rpc_cred = cred,
3530 };
c970aa85
TM		 3531 struct rpc_task_setup task_setup_data = {
3532 .rpc_client = server->client,
5138fde0 3533 .rpc_message = &msg,
c970aa85
TM		 3534 .callback_ops = &nfs4_delegreturn_ops,
3535 .flags = RPC_TASK_ASYNC,
3536 };
e6f81075 3537 int status = 0;
fe650407 3538
938e1010 3539 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3540 if (data == NULL)
3541 return -ENOMEM;
3542 data->args.fhandle = &data->fh;
3543 data->args.stateid = &data->stateid;
fa178f29 3544 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3545 nfs_copy_fh(&data->fh, NFS_FH(inode));
3546 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3547 data->res.fattr = &data->fattr;
3548 data->res.server = server;
5f7dbd5c 3549 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3550 nfs_fattr_init(data->res.fattr);
26e976a8 3551 data->timestamp = jiffies;
fe650407
TM		 3552 data->rpc_status = 0;
3553
c970aa85 3554 task_setup_data.callback_data = data;
5138fde0
TM		 3555 msg.rpc_argp = &data->args,
3556 msg.rpc_resp = &data->res,
c970aa85 3557 task = rpc_run_task(&task_setup_data);
7a1218a2 3558 if (IS_ERR(task))
fe650407 3559 return PTR_ERR(task);
e6f81075
TM		 3560 if (!issync)
3561 goto out;
fe650407 3562 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3563 if (status != 0)
3564 goto out;
3565 status = data->rpc_status;
3566 if (status != 0)
3567 goto out;
3568 nfs_refresh_inode(inode, &data->fattr);
3569out:
e6b3c4db 3570 rpc_put_task(task);
fe650407 3571 return status;
1da177e4
LT		 3572}
3573
e6f81075 3574int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3575{
3576 struct nfs_server *server = NFS_SERVER(inode);
3577 struct nfs4_exception exception = { };
3578 int err;
3579 do {
e6f81075 3580 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3581 switch (err) {
3582 case -NFS4ERR_STALE_STATEID:
3583 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3584 case 0:
3585 return 0;
3586 }
3587 err = nfs4_handle_exception(server, err, &exception);
3588 } while (exception.retry);
3589 return err;
3590}
3591
3592#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3593#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3594
3595/*
3596 * sleep, with exponential backoff, and retry the LOCK operation.
3597 */
3598static unsigned long
3599nfs4_set_lock_task_retry(unsigned long timeout)
3600{
150030b7 3601 schedule_timeout_killable(timeout);
1da177e4
LT		 3602 timeout <<= 1;
3603 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3604 return NFS4_LOCK_MAXTIMEOUT;
3605 return timeout;
3606}
3607
1da177e4
LT		 3608static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3609{
3610 struct inode *inode = state->inode;
3611 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3612 struct nfs_client *clp = server->nfs_client;
911d1aaf 3613 struct nfs_lockt_args arg = {
1da177e4 3614 .fh = NFS_FH(inode),
911d1aaf 3615 .fl = request,
1da177e4 3616 };
911d1aaf
TM		 3617 struct nfs_lockt_res res = {
3618 .denied = request,
1da177e4
LT		 3619 };
3620 struct rpc_message msg = {
3621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3622 .rpc_argp = &arg,
3623 .rpc_resp = &res,
3624 .rpc_cred = state->owner->so_cred,
3625 };
1da177e4
LT		 3626 struct nfs4_lock_state *lsp;
3627 int status;
3628
911d1aaf 3629 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3630 status = nfs4_set_lock_state(state, request);
3631 if (status != 0)
3632 goto out;
3633 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3634 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3635 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3636 switch (status) {
3637 case 0:
3638 request->fl_type = F_UNLCK;
3639 break;
3640 case -NFS4ERR_DENIED:
3641 status = 0;
1da177e4 3642 }
70cc6487 3643 request->fl_ops->fl_release_private(request);
8d0a8a9d 3644out:
1da177e4
LT		 3645 return status;
3646}
3647
3648static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3649{
3650 struct nfs4_exception exception = { };
3651 int err;
3652
3653 do {
3654 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3655 _nfs4_proc_getlk(state, cmd, request),
3656 &exception);
3657 } while (exception.retry);
3658 return err;
3659}
3660
3661static int do_vfs_lock(struct file *file, struct file_lock *fl)
3662{
3663 int res = 0;
3664 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3665 case FL_POSIX:
3666 res = posix_lock_file_wait(file, fl);
3667 break;
3668 case FL_FLOCK:
3669 res = flock_lock_file_wait(file, fl);
3670 break;
3671 default:
3672 BUG();
3673 }
1da177e4
LT		 3674 return res;
3675}
3676
faf5f49c 3677struct nfs4_unlockdata {
911d1aaf
TM		 3678 struct nfs_locku_args arg;
3679 struct nfs_locku_res res;
faf5f49c
TM		 3680 struct nfs4_lock_state *lsp;
3681 struct nfs_open_context *ctx;
911d1aaf
TM		 3682 struct file_lock fl;
3683 const struct nfs_server *server;
26e976a8 3684 unsigned long timestamp;
faf5f49c
TM		 3685};
3686
911d1aaf
TM		 3687static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3688 struct nfs_open_context *ctx,
3689 struct nfs4_lock_state *lsp,
3690 struct nfs_seqid *seqid)
3691{
3692 struct nfs4_unlockdata *p;
3693 struct inode *inode = lsp->ls_state->inode;
3694
a893693c 3695 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3696 if (p == NULL)
3697 return NULL;
3698 p->arg.fh = NFS_FH(inode);
3699 p->arg.fl = &p->fl;
3700 p->arg.seqid = seqid;
c1d51931 3701 p->res.seqid = seqid;
5f7dbd5c 3702 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3703 p->arg.stateid = &lsp->ls_stateid;
3704 p->lsp = lsp;
3705 atomic_inc(&lsp->ls_count);
3706 /* Ensure we don't close file until we're done freeing locks! */
3707 p->ctx = get_nfs_open_context(ctx);
3708 memcpy(&p->fl, fl, sizeof(p->fl));
3709 p->server = NFS_SERVER(inode);
3710 return p;
3711}
3712
06f814a3 3713static void nfs4_locku_release_calldata(void *data)
faf5f49c 3714{
963d8fe5 3715 struct nfs4_unlockdata *calldata = data;
911d1aaf 3716 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3717 nfs4_put_lock_state(calldata->lsp);
3718 put_nfs_open_context(calldata->ctx);
3719 kfree(calldata);
faf5f49c
TM		 3720}
3721
963d8fe5 3722static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3723{
963d8fe5 3724 struct nfs4_unlockdata *calldata = data;
faf5f49c 3725
a893693c
AA		 3726 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3727 task->tk_status);
06f814a3
TM		 3728 if (RPC_ASSASSINATED(task))
3729 return;
faf5f49c
TM		 3730 switch (task->tk_status) {
3731 case 0:
3732 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3733 calldata->res.stateid.data,
faf5f49c 3734 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3735 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3736 break;
9e33bed5
TM		 3737 case -NFS4ERR_BAD_STATEID:
3738 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3739 case -NFS4ERR_STALE_STATEID:
3740 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3741 break;
3742 default:
9e33bed5 3743 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3744 nfs4_restart_rpc(task,
3745 calldata->server->nfs_client);
faf5f49c 3746 }
a893693c
AA		 3747 nfs4_sequence_free_slot(calldata->server->nfs_client,
3748 &calldata->res.seq_res);
faf5f49c
TM		 3749}
3750
4ce70ada 3751static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3752{
4ce70ada 3753 struct nfs4_unlockdata *calldata = data;
faf5f49c 3754
911d1aaf 3755 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3756 return;
3757 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3758 /* Note: exit _without_ running nfs4_locku_done */
3759 task->tk_action = NULL;
faf5f49c
TM		 3760 return;
3761 }
26e976a8 3762 calldata->timestamp = jiffies;
a893693c
AA		 3763 if (nfs4_setup_sequence(calldata->server->nfs_client,
3764 &calldata->arg.seq_args,
3765 &calldata->res.seq_res, 1, task))
3766 return;
5138fde0 3767 rpc_call_start(task);
faf5f49c
TM		 3768}
3769
963d8fe5 3770static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3771 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3772 .rpc_call_done = nfs4_locku_done,
06f814a3 3773 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3774};
3775
a5d16a4d
TM		 3776static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3777 struct nfs_open_context *ctx,
3778 struct nfs4_lock_state *lsp,
3779 struct nfs_seqid *seqid)
3780{
3781 struct nfs4_unlockdata *data;
5138fde0
TM		 3782 struct rpc_message msg = {
3783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3784 .rpc_cred = ctx->cred,
3785 };
c970aa85
TM		 3786 struct rpc_task_setup task_setup_data = {
3787 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3788 .rpc_message = &msg,
c970aa85 3789 .callback_ops = &nfs4_locku_ops,
101070ca 3790 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3791 .flags = RPC_TASK_ASYNC,
3792 };
a5d16a4d 3793
137d6aca
FF		 3794 /* Ensure this is an unlock - when canceling a lock, the
3795 * canceled lock is passed in, and it won't be an unlock.
3796 */
3797 fl->fl_type = F_UNLCK;
3798
a5d16a4d
TM		 3799 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3800 if (data == NULL) {
3801 nfs_free_seqid(seqid);
3802 return ERR_PTR(-ENOMEM);
3803 }
3804
5138fde0
TM		 3805 msg.rpc_argp = &data->arg,
3806 msg.rpc_resp = &data->res,
c970aa85
TM		 3807 task_setup_data.callback_data = data;
3808 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3809}
3810
faf5f49c
TM		 3811static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3812{
19e03c57 3813 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3814 struct nfs_seqid *seqid;
1da177e4 3815 struct nfs4_lock_state *lsp;
06f814a3
TM		 3816 struct rpc_task *task;
3817 int status = 0;
536ff0f8 3818 unsigned char fl_flags = request->fl_flags;
faf5f49c 3819
8d0a8a9d 3820 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3821 /* Unlock _before_ we do the RPC call */
3822 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3823 down_read(&nfsi->rwsem);
3824 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3825 up_read(&nfsi->rwsem);
9b073574 3826 goto out;
19e03c57
TM		 3827 }
3828 up_read(&nfsi->rwsem);
8d0a8a9d 3829 if (status != 0)
9b073574
TM		 3830 goto out;
3831 /* Is this a delegated lock? */
3832 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3833 goto out;
8d0a8a9d 3834 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3835 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3836 status = -ENOMEM;
911d1aaf 3837 if (seqid == NULL)
9b073574 3838 goto out;
cd3758e3 3839 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3840 status = PTR_ERR(task);
3841 if (IS_ERR(task))
9b073574 3842 goto out;
a5d16a4d 3843 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3844 rpc_put_task(task);
9b073574 3845out:
536ff0f8 3846 request->fl_flags = fl_flags;
1da177e4
LT		 3847 return status;
3848}
3849
a5d16a4d
TM		 3850struct nfs4_lockdata {
3851 struct nfs_lock_args arg;
3852 struct nfs_lock_res res;
3853 struct nfs4_lock_state *lsp;
3854 struct nfs_open_context *ctx;
3855 struct file_lock fl;
26e976a8 3856 unsigned long timestamp;
a5d16a4d
TM		 3857 int rpc_status;
3858 int cancelled;
66179efe 3859 struct nfs_server *server;
a5d16a4d
TM		 3860};
3861
3862static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3863 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3864{
a5d16a4d
TM		 3865 struct nfs4_lockdata *p;
3866 struct inode *inode = lsp->ls_state->inode;
1da177e4 3867 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3868
3869 p = kzalloc(sizeof(*p), GFP_KERNEL);
3870 if (p == NULL)
3871 return NULL;
3872
3873 p->arg.fh = NFS_FH(inode);
3874 p->arg.fl = &p->fl;
2f74c0a0
TM		 3875 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3876 if (p->arg.open_seqid == NULL)
3877 goto out_free;
a5d16a4d
TM		 3878 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3879 if (p->arg.lock_seqid == NULL)
2f74c0a0 3880 goto out_free_seqid;
a5d16a4d 3881 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3882 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3883 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3884 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3885 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3886 p->lsp = lsp;
66179efe 3887 p->server = server;
a5d16a4d
TM		 3888 atomic_inc(&lsp->ls_count);
3889 p->ctx = get_nfs_open_context(ctx);
3890 memcpy(&p->fl, fl, sizeof(p->fl));
3891 return p;
2f74c0a0
TM		 3892out_free_seqid:
3893 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3894out_free:
3895 kfree(p);
3896 return NULL;
3897}
3898
3899static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3900{
3901 struct nfs4_lockdata *data = calldata;
3902 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3903
3110ff80 3904 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3905 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3906 return;
a5d16a4d
TM		 3907 /* Do we need to do an open_to_lock_owner? */
3908 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3909 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3910 return;
a5d16a4d
TM		 3911 data->arg.open_stateid = &state->stateid;
3912 data->arg.new_lock_owner = 1;
c1d51931 3913 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3914 } else
3915 data->arg.new_lock_owner = 0;
26e976a8 3916 data->timestamp = jiffies;
66179efe
AA		 3917 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3918 &data->res.seq_res, 1, task))
3919 return;
5138fde0 3920 rpc_call_start(task);
3110ff80 3921 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3922}
3923
3924static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3925{
3926 struct nfs4_lockdata *data = calldata;
3927
3110ff80 3928 dprintk("%s: begin!\n", __func__);
a5d16a4d 3929
66179efe
AA		 3930 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3931 task->tk_status);
3932
a5d16a4d
TM		 3933 data->rpc_status = task->tk_status;
3934 if (RPC_ASSASSINATED(task))
3935 goto out;
3936 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3937 if (data->rpc_status == 0)
3938 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3939 else
3940 goto out;
3941 }
3942 if (data->rpc_status == 0) {
3943 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3944 sizeof(data->lsp->ls_stateid.data));
3945 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3946 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3947 }
a5d16a4d 3948out:
3110ff80 3949 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3950}
3951
3952static void nfs4_lock_release(void *calldata)
3953{
3954 struct nfs4_lockdata *data = calldata;
3955
3110ff80 3956 dprintk("%s: begin!\n", __func__);
2f74c0a0 3957 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3958 if (data->cancelled != 0) {
3959 struct rpc_task *task;
3960 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3961 data->arg.lock_seqid);
3962 if (!IS_ERR(task))
e6b3c4db 3963 rpc_put_task(task);
3110ff80 3964 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3965 } else
3966 nfs_free_seqid(data->arg.lock_seqid);
3967 nfs4_put_lock_state(data->lsp);
3968 put_nfs_open_context(data->ctx);
3969 kfree(data);
3110ff80 3970 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3971}
3972
3973static const struct rpc_call_ops nfs4_lock_ops = {
3974 .rpc_call_prepare = nfs4_lock_prepare,
3975 .rpc_call_done = nfs4_lock_done,
3976 .rpc_release = nfs4_lock_release,
3977};
3978
3979static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3980{
3981 struct nfs4_lockdata *data;
3982 struct rpc_task *task;
5138fde0
TM		 3983 struct rpc_message msg = {
3984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3985 .rpc_cred = state->owner->so_cred,
3986 };
c970aa85
TM		 3987 struct rpc_task_setup task_setup_data = {
3988 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3989 .rpc_message = &msg,
c970aa85 3990 .callback_ops = &nfs4_lock_ops,
101070ca 3991 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3992 .flags = RPC_TASK_ASYNC,
3993 };
a5d16a4d
TM		 3994 int ret;
3995
3110ff80 3996 dprintk("%s: begin!\n", __func__);
cd3758e3 3997 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3998 fl->fl_u.nfs4_fl.owner);
3999 if (data == NULL)
4000 return -ENOMEM;
4001 if (IS_SETLKW(cmd))
4002 data->arg.block = 1;
4003 if (reclaim != 0)
4004 data->arg.reclaim = 1;
5138fde0
TM		 4005 msg.rpc_argp = &data->arg,
4006 msg.rpc_resp = &data->res,
c970aa85
TM		 4007 task_setup_data.callback_data = data;
4008 task = rpc_run_task(&task_setup_data);
7a1218a2 4009 if (IS_ERR(task))
a5d16a4d 4010 return PTR_ERR(task);
a5d16a4d
TM		 4011 ret = nfs4_wait_for_completion_rpc_task(task);
4012 if (ret == 0) {
4013 ret = data->rpc_status;
a5d16a4d
TM		 4014 } else
4015 data->cancelled = 1;
e6b3c4db 4016 rpc_put_task(task);
3110ff80 4017 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4018 return ret;
1da177e4
LT		 4019}
4020
4021static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4022{
202b50dc
TM		 4023 struct nfs_server *server = NFS_SERVER(state->inode);
4024 struct nfs4_exception exception = { };
4025 int err;
4026
4027 do {
42a2d13e
TM		 4028 /* Cache the lock if possible... */
4029 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4030 return 0;
202b50dc
TM		 4031 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4032 if (err != -NFS4ERR_DELAY)
4033 break;
4034 nfs4_handle_exception(server, err, &exception);
4035 } while (exception.retry);
4036 return err;
1da177e4
LT		 4037}
4038
4039static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4040{
202b50dc
TM		 4041 struct nfs_server *server = NFS_SERVER(state->inode);
4042 struct nfs4_exception exception = { };
4043 int err;
4044
6bfc93ef
TM		 4045 err = nfs4_set_lock_state(state, request);
4046 if (err != 0)
4047 return err;
202b50dc 4048 do {
42a2d13e
TM		 4049 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4050 return 0;
202b50dc
TM		 4051 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4052 if (err != -NFS4ERR_DELAY)
4053 break;
4054 nfs4_handle_exception(server, err, &exception);
4055 } while (exception.retry);
4056 return err;
1da177e4
LT		 4057}
4058
4059static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4060{
19e03c57 4061 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4062 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4063 int status;
4064
6bfc93ef 4065 /* Is this a delegated open? */
6bfc93ef
TM		 4066 status = nfs4_set_lock_state(state, request);
4067 if (status != 0)
4068 goto out;
01c3b861
TM		 4069 request->fl_flags |= FL_ACCESS;
4070 status = do_vfs_lock(request->fl_file, request);
4071 if (status < 0)
4072 goto out;
19e03c57 4073 down_read(&nfsi->rwsem);
01c3b861 4074 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4075 /* Yes: cache locks! */
01c3b861 4076 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4077 request->fl_flags = fl_flags & ~FL_SLEEP;
4078 status = do_vfs_lock(request->fl_file, request);
4079 goto out_unlock;
01c3b861 4080 }
6bfc93ef
TM		 4081 status = _nfs4_do_setlk(state, cmd, request, 0);
4082 if (status != 0)
01c3b861 4083 goto out_unlock;
6bfc93ef 4084 /* Note: we always want to sleep here! */
01c3b861 4085 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4086 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4087 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4088out_unlock:
19e03c57 4089 up_read(&nfsi->rwsem);
01c3b861
TM		 4090out:
4091 request->fl_flags = fl_flags;
1da177e4
LT		 4092 return status;
4093}
4094
4095static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4096{
4097 struct nfs4_exception exception = { };
4098 int err;
4099
4100 do {
965b5d67
TM		 4101 err = _nfs4_proc_setlk(state, cmd, request);
4102 if (err == -NFS4ERR_DENIED)
4103 err = -EAGAIN;
1da177e4 4104 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4105 err, &exception);
1da177e4
LT		 4106 } while (exception.retry);
4107 return err;
4108}
4109
4110static int
4111nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4112{
4113 struct nfs_open_context *ctx;
4114 struct nfs4_state *state;
4115 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4116 int status;
4117
4118 /* verify open state */
cd3758e3 4119 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4120 state = ctx->state;
4121
4122 if (request->fl_start < 0 || request->fl_end < 0)
4123 return -EINVAL;
4124
d953126a
TM		 4125 if (IS_GETLK(cmd)) {
4126 if (state != NULL)
4127 return nfs4_proc_getlk(state, F_GETLK, request);
4128 return 0;
4129 }
1da177e4
LT		 4130
4131 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4132 return -EINVAL;
4133
d953126a
TM		 4134 if (request->fl_type == F_UNLCK) {
4135 if (state != NULL)
4136 return nfs4_proc_unlck(state, cmd, request);
4137 return 0;
4138 }
1da177e4 4139
d953126a
TM		 4140 if (state == NULL)
4141 return -ENOLCK;
1da177e4
LT		 4142 do {
4143 status = nfs4_proc_setlk(state, cmd, request);
4144 if ((status != -EAGAIN) || IS_SETLK(cmd))
4145 break;
4146 timeout = nfs4_set_lock_task_retry(timeout);
4147 status = -ERESTARTSYS;
4148 if (signalled())
4149 break;
4150 } while(status < 0);
1da177e4
LT		 4151 return status;
4152}
4153
888e694c
TM		 4154int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4155{
4156 struct nfs_server *server = NFS_SERVER(state->inode);
4157 struct nfs4_exception exception = { };
4158 int err;
4159
4160 err = nfs4_set_lock_state(state, fl);
4161 if (err != 0)
4162 goto out;
4163 do {
4164 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4165 switch (err) {
4166 default:
4167 printk(KERN_ERR "%s: unhandled error %d.\n",
4168 __func__, err);
4169 case 0:
965b5d67 4170 case -ESTALE:
d5122201
TM		 4171 goto out;
4172 case -NFS4ERR_EXPIRED:
4173 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4174 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4175 nfs4_schedule_state_recovery(server->nfs_client);
4176 goto out;
965b5d67
TM		 4177 case -ERESTARTSYS:
4178 /*
4179 * The show must go on: exit, but mark the
4180 * stateid as needing recovery.
4181 */
4182 case -NFS4ERR_ADMIN_REVOKED:
4183 case -NFS4ERR_BAD_STATEID:
4184 case -NFS4ERR_OPENMODE:
4185 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4186 err = 0;
4187 goto out;
4188 case -ENOMEM:
4189 case -NFS4ERR_DENIED:
4190 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4191 err = 0;
4192 goto out;
d5122201
TM		 4193 case -NFS4ERR_DELAY:
4194 break;
4195 }
888e694c
TM		 4196 err = nfs4_handle_exception(server, err, &exception);
4197 } while (exception.retry);
4198out:
4199 return err;
4200}
6b3b5496 4201
aa1870af
BF		 4202#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4203
6b3b5496
BF		 4204int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4205 size_t buflen, int flags)
4206{
4b580ee3
BF		 4207 struct inode *inode = dentry->d_inode;
4208
4209 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4210 return -EOPNOTSUPP;
4211
4b580ee3 4212 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4213}
4214
4215/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4216 * and that's what we'll do for e.g. user attributes that haven't been set.
4217 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4218 * attributes in kernel-managed attribute namespaces. */
4219ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4220 size_t buflen)
4221{
aa1870af
BF		 4222 struct inode *inode = dentry->d_inode;
4223
4224 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4225 return -EOPNOTSUPP;
4226
4227 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4228}
4229
4230ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4231{
aa1870af 4232 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4233
096455a2
BF		 4234 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4235 return 0;
6b3b5496
BF		 4236 if (buf && buflen < len)
4237 return -ERANGE;
4238 if (buf)
aa1870af
BF		 4239 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4240 return len;
6b3b5496
BF		 4241}
4242
69aaaae1
TM		 4243static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4244{
4245 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4246 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4247 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4248 return;
4249
4250 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4251 NFS_ATTR_FATTR_NLINK;
4252 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4253 fattr->nlink = 2;
4254}
4255
56659e99 4256int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4257 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4258{
4259 struct nfs_server *server = NFS_SERVER(dir);
4260 u32 bitmask[2] = {
361e624f
MN		 4261 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4262 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4263 };
4264 struct nfs4_fs_locations_arg args = {
4265 .dir_fh = NFS_FH(dir),
c228fd3a 4266 .name = name,
683b57b4
TM		 4267 .page = page,
4268 .bitmask = bitmask,
4269 };
22958463
BH		 4270 struct nfs4_fs_locations_res res = {
4271 .fs_locations = fs_locations,
4272 };
683b57b4
TM		 4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4275 .rpc_argp = &args,
22958463 4276 .rpc_resp = &res,
683b57b4
TM		 4277 };
4278 int status;
4279
3110ff80 4280 dprintk("%s: start\n", __func__);
c228fd3a 4281 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4282 fs_locations->server = server;
830b8e33 4283 fs_locations->nlocations = 0;
cccef3b9 4284 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4285 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4286 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4287 return status;
4288}
4289
557134a3 4290#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4291/*
4292 * nfs4_proc_exchange_id()
4293 *
4294 * Since the clientid has expired, all compounds using sessions
4295 * associated with the stale clientid will be returning
4296 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4297 * be in some phase of session reset.
4298 */
4299static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4300{
4301 nfs4_verifier verifier;
4302 struct nfs41_exchange_id_args args = {
4303 .client = clp,
4304 .flags = clp->cl_exchange_flags,
4305 };
4306 struct nfs41_exchange_id_res res = {
4307 .client = clp,
4308 };
4309 int status;
4310 struct rpc_message msg = {
4311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4312 .rpc_argp = &args,
4313 .rpc_resp = &res,
4314 .rpc_cred = cred,
4315 };
4316 __be32 *p;
4317
4318 dprintk("--> %s\n", __func__);
4319 BUG_ON(clp == NULL);
a7b72103 4320
99fe60d0
BH		 4321 p = (u32 *)verifier.data;
4322 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4323 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4324 args.verifier = &verifier;
4325
4326 while (1) {
4327 args.id_len = scnprintf(args.id, sizeof(args.id),
4328 "%s/%s %u",
4329 clp->cl_ipaddr,
4330 rpc_peeraddr2str(clp->cl_rpcclient,
4331 RPC_DISPLAY_ADDR),
4332 clp->cl_id_uniquifier);
4333
4334 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4335
4336 if (status != NFS4ERR_CLID_INUSE)
4337 break;
4338
4339 if (signalled())
4340 break;
4341
4342 if (++clp->cl_id_uniquifier == 0)
4343 break;
4344 }
4345
4346 dprintk("<-- %s status= %d\n", __func__, status);
4347 return status;
4348}
4349
2050f0cc
AA		 4350struct nfs4_get_lease_time_data {
4351 struct nfs4_get_lease_time_args *args;
4352 struct nfs4_get_lease_time_res *res;
4353 struct nfs_client *clp;
4354};
4355
4356static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4357 void *calldata)
4358{
4359 int ret;
4360 struct nfs4_get_lease_time_data *data =
4361 (struct nfs4_get_lease_time_data *)calldata;
4362
4363 dprintk("--> %s\n", __func__);
4364 /* just setup sequence, do not trigger session recovery
4365 since we're invoked within one */
4366 ret = nfs41_setup_sequence(data->clp->cl_session,
4367 &data->args->la_seq_args,
4368 &data->res->lr_seq_res, 0, task);
4369
4370 BUG_ON(ret == -EAGAIN);
4371 rpc_call_start(task);
4372 dprintk("<-- %s\n", __func__);
4373}
4374
4375/*
4376 * Called from nfs4_state_manager thread for session setup, so don't recover
4377 * from sequence operation or clientid errors.
4378 */
4379static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4380{
4381 struct nfs4_get_lease_time_data *data =
4382 (struct nfs4_get_lease_time_data *)calldata;
4383
4384 dprintk("--> %s\n", __func__);
4385 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4386 switch (task->tk_status) {
4387 case -NFS4ERR_DELAY:
4388 case -NFS4ERR_GRACE:
4389 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4390 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4391 task->tk_status = 0;
eedc020e 4392 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4393 return;
4394 }
4395 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4396 dprintk("<-- %s\n", __func__);
4397}
4398
4399struct rpc_call_ops nfs4_get_lease_time_ops = {
4400 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4401 .rpc_call_done = nfs4_get_lease_time_done,
4402};
4403
4404int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4405{
4406 struct rpc_task *task;
4407 struct nfs4_get_lease_time_args args;
4408 struct nfs4_get_lease_time_res res = {
4409 .lr_fsinfo = fsinfo,
4410 };
4411 struct nfs4_get_lease_time_data data = {
4412 .args = &args,
4413 .res = &res,
4414 .clp = clp,
4415 };
4416 struct rpc_message msg = {
4417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4418 .rpc_argp = &args,
4419 .rpc_resp = &res,
4420 };
4421 struct rpc_task_setup task_setup = {
4422 .rpc_client = clp->cl_rpcclient,
4423 .rpc_message = &msg,
4424 .callback_ops = &nfs4_get_lease_time_ops,
4425 .callback_data = &data
4426 };
4427 int status;
4428
4429 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4430 dprintk("--> %s\n", __func__);
4431 task = rpc_run_task(&task_setup);
4432
4433 if (IS_ERR(task))
4434 status = PTR_ERR(task);
4435 else {
4436 status = task->tk_status;
4437 rpc_put_task(task);
4438 }
4439 dprintk("<-- %s return %d\n", __func__, status);
4440
4441 return status;
4442}
4443
b73dafa7
RL		 4444/*
4445 * Reset a slot table
4446 */
4447static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4448 int old_max_slots, int ivalue)
ac72b7b3 4449{
b73dafa7 4450 int i;
ac72b7b3
AA		 4451 int ret = 0;
4452
b73dafa7 4453 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4454
b73dafa7
RL		 4455 /*
4456 * Until we have dynamic slot table adjustment, insist
4457 * upon the same slot table size
4458 */
ac72b7b3
AA		 4459 if (max_slots != old_max_slots) {
4460 dprintk("%s reset slot table does't match old\n",
4461 __func__);
4462 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4463 goto out;
4464 }
4465 spin_lock(&tbl->slot_tbl_lock);
4466 for (i = 0; i < max_slots; ++i)
b73dafa7 4467 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4468 tbl->highest_used_slotid = -1;
4469 spin_unlock(&tbl->slot_tbl_lock);
4470 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4471 tbl, tbl->slots, tbl->max_slots);
4472out:
4473 dprintk("<-- %s: return %d\n", __func__, ret);
4474 return ret;
4475}
4476
b73dafa7
RL		 4477/*
4478 * Reset the forechannel and backchannel slot tables
4479 */
4480static int nfs4_reset_slot_tables(struct nfs4_session *session)
4481{
4482 int status;
4483
4484 status = nfs4_reset_slot_table(&session->fc_slot_table,
4485 session->fc_attrs.max_reqs,
4486 session->fc_slot_table.max_slots,
4487 1);
f8625a6a
RL		 4488 if (status)
4489 return status;
4490
4491 status = nfs4_reset_slot_table(&session->bc_slot_table,
4492 session->bc_attrs.max_reqs,
4493 session->bc_slot_table.max_slots,
4494 0);
b73dafa7
RL		 4495 return status;
4496}
4497
f8625a6a
RL		 4498/* Destroy the slot table */
4499static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4500{
4501 if (session->fc_slot_table.slots != NULL) {
4502 kfree(session->fc_slot_table.slots);
4503 session->fc_slot_table.slots = NULL;
4504 }
4505 if (session->bc_slot_table.slots != NULL) {
4506 kfree(session->bc_slot_table.slots);
4507 session->bc_slot_table.slots = NULL;
4508 }
4509 return;
4510}
4511
fc931582
AA		 4512/*
4513 * Initialize slot table
4514 */
050047ce
RL		 4515static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4516 int max_slots, int ivalue)
fc931582 4517{
050047ce 4518 int i;
fc931582
AA		 4519 struct nfs4_slot *slot;
4520 int ret = -ENOMEM;
4521
4522 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4523
050047ce 4524 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4525
4526 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4527 if (!slot)
4528 goto out;
4529 for (i = 0; i < max_slots; ++i)
050047ce 4530 slot[i].seq_nr = ivalue;
fc931582
AA		 4531 ret = 0;
4532
4533 spin_lock(&tbl->slot_tbl_lock);
4534 if (tbl->slots != NULL) {
4535 spin_unlock(&tbl->slot_tbl_lock);
4536 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4537 __func__, tbl, tbl->slots);
4538 WARN_ON(1);
4539 goto out_free;
4540 }
4541 tbl->max_slots = max_slots;
4542 tbl->slots = slot;
4543 tbl->highest_used_slotid = -1; /* no slot is currently used */
4544 spin_unlock(&tbl->slot_tbl_lock);
4545 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4546 tbl, tbl->slots, tbl->max_slots);
4547out:
4548 dprintk("<-- %s: return %d\n", __func__, ret);
4549 return ret;
050047ce 4550
fc931582
AA		 4551out_free:
4552 kfree(slot);
4553 goto out;
4554}
4555
050047ce
RL		 4556/*
4557 * Initialize the forechannel and backchannel tables
4558 */
4559static int nfs4_init_slot_tables(struct nfs4_session *session)
4560{
4561 int status;
4562
4563 status = nfs4_init_slot_table(&session->fc_slot_table,
4564 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4565 if (status)
4566 return status;
050047ce 4567
f8625a6a
RL		 4568 status = nfs4_init_slot_table(&session->bc_slot_table,
4569 session->bc_attrs.max_reqs, 0);
4570 if (status)
4571 nfs4_destroy_slot_tables(session);
4572
4573 return status;
557134a3
AA		 4574}
4575
4576struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4577{
4578 struct nfs4_session *session;
4579 struct nfs4_slot_table *tbl;
4580
4581 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4582 if (!session)
4583 return NULL;
76db6d95
AA		 4584
4585 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4586 /*
4587 * The create session reply races with the server back
4588 * channel probe. Mark the client NFS_CS_SESSION_INITING
4589 * so that the client back channel can find the
4590 * nfs_client struct
4591 */
4592 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4593
557134a3
AA		 4594 tbl = &session->fc_slot_table;
4595 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4596 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4597
4598 tbl = &session->bc_slot_table;
4599 spin_lock_init(&tbl->slot_tbl_lock);
4600 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4601
557134a3
AA		 4602 session->clp = clp;
4603 return session;
4604}
4605
4606void nfs4_destroy_session(struct nfs4_session *session)
4607{
5a0ffe54
AA		 4608 nfs4_proc_destroy_session(session);
4609 dprintk("%s Destroy backchannel for xprt %p\n",
4610 __func__, session->clp->cl_rpcclient->cl_xprt);
4611 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4612 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4613 nfs4_destroy_slot_tables(session);
557134a3
AA		 4614 kfree(session);
4615}
4616
fc931582
AA		 4617/*
4618 * Initialize the values to be used by the client in CREATE_SESSION
4619 * If nfs4_init_session set the fore channel request and response sizes,
4620 * use them.
4621 *
4622 * Set the back channel max_resp_sz_cached to zero to force the client to
4623 * always set csa_cachethis to FALSE because the current implementation
4624 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4625 */
4626static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4627{
4628 struct nfs4_session *session = args->client->cl_session;
4629 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4630 mxresp_sz = session->fc_attrs.max_resp_sz;
4631
4632 if (mxrqst_sz == 0)
4633 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4634 if (mxresp_sz == 0)
4635 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4636 /* Fore channel attributes */
4637 args->fc_attrs.headerpadsz = 0;
4638 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4639 args->fc_attrs.max_resp_sz = mxresp_sz;
4640 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4641 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4642 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4643
4644 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4645 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4646 __func__,
4647 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4648 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4649 args->fc_attrs.max_reqs);
4650
4651 /* Back channel attributes */
4652 args->bc_attrs.headerpadsz = 0;
4653 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4654 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4655 args->bc_attrs.max_resp_sz_cached = 0;
4656 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4657 args->bc_attrs.max_reqs = 1;
4658
4659 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4660 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4661 __func__,
4662 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4663 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4664 args->bc_attrs.max_reqs);
4665}
4666
8d35301d
AA		 4667static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4668{
4669 if (rcvd <= sent)
4670 return 0;
4671 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4672 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4673 return -EINVAL;
4674}
4675
4676#define _verify_fore_channel_attr(_name_) \
4677 _verify_channel_attr("fore", #_name_, \
4678 args->fc_attrs._name_, \
4679 session->fc_attrs._name_)
4680
4681#define _verify_back_channel_attr(_name_) \
4682 _verify_channel_attr("back", #_name_, \
4683 args->bc_attrs._name_, \
4684 session->bc_attrs._name_)
4685
4686/*
4687 * The server is not allowed to increase the fore channel header pad size,
4688 * maximum response size, or maximum number of operations.
4689 *
4690 * The back channel attributes are only negotiatied down: We send what the
4691 * (back channel) server insists upon.
4692 */
4693static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4694 struct nfs4_session *session)
4695{
4696 int ret = 0;
4697
4698 ret |= _verify_fore_channel_attr(headerpadsz);
4699 ret |= _verify_fore_channel_attr(max_resp_sz);
4700 ret |= _verify_fore_channel_attr(max_ops);
4701
4702 ret |= _verify_back_channel_attr(headerpadsz);
4703 ret |= _verify_back_channel_attr(max_rqst_sz);
4704 ret |= _verify_back_channel_attr(max_resp_sz);
4705 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4706 ret |= _verify_back_channel_attr(max_ops);
4707 ret |= _verify_back_channel_attr(max_reqs);
4708
4709 return ret;
4710}
4711
fc931582
AA		 4712static int _nfs4_proc_create_session(struct nfs_client *clp)
4713{
4714 struct nfs4_session *session = clp->cl_session;
4715 struct nfs41_create_session_args args = {
4716 .client = clp,
4717 .cb_program = NFS4_CALLBACK,
4718 };
4719 struct nfs41_create_session_res res = {
4720 .client = clp,
4721 };
4722 struct rpc_message msg = {
4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4724 .rpc_argp = &args,
4725 .rpc_resp = &res,
4726 };
4727 int status;
4728
4729 nfs4_init_channel_attrs(&args);
0f91421e 4730 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4731
4732 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4733
8d35301d
AA		 4734 if (!status)
4735 /* Verify the session's negotiated channel_attrs values */
4736 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4737 if (!status) {
4738 /* Increment the clientid slot sequence id */
4739 clp->cl_seqid++;
4740 }
4741
4742 return status;
4743}
4744
4745/*
4746 * Issues a CREATE_SESSION operation to the server.
4747 * It is the responsibility of the caller to verify the session is
4748 * expired before calling this routine.
4749 */
ac72b7b3 4750int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4751{
4752 int status;
4753 unsigned *ptr;
4754 struct nfs_fsinfo fsinfo;
4755 struct nfs4_session *session = clp->cl_session;
4756
4757 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4758
4759 status = _nfs4_proc_create_session(clp);
4760 if (status)
4761 goto out;
4762
ac72b7b3
AA		 4763 /* Init or reset the fore channel */
4764 if (reset)
b73dafa7 4765 status = nfs4_reset_slot_tables(session);
ac72b7b3 4766 else
050047ce 4767 status = nfs4_init_slot_tables(session);
fc931582
AA		 4768 dprintk("fore channel slot table initialization returned %d\n", status);
4769 if (status)
4770 goto out;
4771
4772 ptr = (unsigned *)&session->sess_id.data[0];
4773 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4774 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4775
ac72b7b3
AA		 4776 if (reset)
4777 /* Lease time is aleady set */
4778 goto out;
4779
fc931582
AA		 4780 /* Get the lease time */
4781 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4782 if (status == 0) {
4783 /* Update lease time and schedule renewal */
4784 spin_lock(&clp->cl_lock);
4785 clp->cl_lease_time = fsinfo.lease_time * HZ;
4786 clp->cl_last_renewal = jiffies;
4787 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4788 spin_unlock(&clp->cl_lock);
4789
4790 nfs4_schedule_state_renewal(clp);
4791 }
4792out:
4793 dprintk("<-- %s\n", __func__);
4794 return status;
4795}
4796
0f3e66c6
AA		 4797/*
4798 * Issue the over-the-wire RPC DESTROY_SESSION.
4799 * The caller must serialize access to this routine.
4800 */
4801int nfs4_proc_destroy_session(struct nfs4_session *session)
4802{
4803 int status = 0;
4804 struct rpc_message msg;
4805
4806 dprintk("--> nfs4_proc_destroy_session\n");
4807
4808 /* session is still being setup */
4809 if (session->clp->cl_cons_state != NFS_CS_READY)
4810 return status;
4811
4812 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4813 msg.rpc_argp = session;
4814 msg.rpc_resp = NULL;
4815 msg.rpc_cred = NULL;
4816 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4817
4818 if (status)
4819 printk(KERN_WARNING
4820 "Got error %d from the server on DESTROY_SESSION. "
4821 "Session has been destroyed regardless...\n", status);
4822
4823 dprintk("<-- nfs4_proc_destroy_session\n");
4824 return status;
4825}
4826
fccba804
TM		 4827int nfs4_init_session(struct nfs_server *server)
4828{
4829 struct nfs_client *clp = server->nfs_client;
4830 int ret;
4831
4832 if (!nfs4_has_session(clp))
4833 return 0;
4834
4835 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4836 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4837 ret = nfs4_recover_expired_lease(server);
4838 if (!ret)
4839 ret = nfs4_check_client_ready(clp);
4840 return ret;
4841}
4842
fc01cea9
AA		 4843/*
4844 * Renew the cl_session lease.
4845 */
4846static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4847{
4848 struct nfs4_sequence_args args;
4849 struct nfs4_sequence_res res;
4850
4851 struct rpc_message msg = {
4852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4853 .rpc_argp = &args,
4854 .rpc_resp = &res,
4855 .rpc_cred = cred,
4856 };
4857
4858 args.sa_cache_this = 0;
4859
4860 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4861 &res, 0);
4862}
4863
4864void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4865{
4866 struct nfs_client *clp = (struct nfs_client *)data;
4867
4868 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4869
4870 if (task->tk_status < 0) {
4871 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4872
4873 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4874 == -EAGAIN) {
eedc020e 4875 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4876 return;
4877 }
4878 }
4879 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4880 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4881
fc01cea9
AA		 4882 kfree(task->tk_msg.rpc_argp);
4883 kfree(task->tk_msg.rpc_resp);
4884
4885 dprintk("<-- %s\n", __func__);
4886}
4887
4888static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4889{
4890 struct nfs_client *clp;
4891 struct nfs4_sequence_args *args;
4892 struct nfs4_sequence_res *res;
4893
4894 clp = (struct nfs_client *)data;
4895 args = task->tk_msg.rpc_argp;
4896 res = task->tk_msg.rpc_resp;
4897
4898 if (nfs4_setup_sequence(clp, args, res, 0, task))
4899 return;
4900 rpc_call_start(task);
4901}
4902
4903static const struct rpc_call_ops nfs41_sequence_ops = {
4904 .rpc_call_done = nfs41_sequence_call_done,
4905 .rpc_call_prepare = nfs41_sequence_prepare,
4906};
4907
4908static int nfs41_proc_async_sequence(struct nfs_client *clp,
4909 struct rpc_cred *cred)
4910{
4911 struct nfs4_sequence_args *args;
4912 struct nfs4_sequence_res *res;
4913 struct rpc_message msg = {
4914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4915 .rpc_cred = cred,
4916 };
4917
4918 args = kzalloc(sizeof(*args), GFP_KERNEL);
4919 if (!args)
4920 return -ENOMEM;
4921 res = kzalloc(sizeof(*res), GFP_KERNEL);
4922 if (!res) {
4923 kfree(args);
4924 return -ENOMEM;
4925 }
4926 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4927 msg.rpc_argp = args;
4928 msg.rpc_resp = res;
4929
4930 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4931 &nfs41_sequence_ops, (void *)clp);
4932}
4933
557134a3
AA		 4934#endif /* CONFIG_NFS_V4_1 */
4935
591d71cb 4936struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4937 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4938 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4939 .recover_open = nfs4_open_reclaim,
4940 .recover_lock = nfs4_lock_reclaim,
591d71cb 4941 .establish_clid = nfs4_init_clientid,
90a16617 4942 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4943};
4944
591d71cb
AA		 4945#if defined(CONFIG_NFS_V4_1)
4946struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4947 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4948 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4949 .recover_open = nfs4_open_reclaim,
4950 .recover_lock = nfs4_lock_reclaim,
4951 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4952 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4953};
4954#endif /* CONFIG_NFS_V4_1 */
4955
4956struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4957 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4958 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4959 .recover_open = nfs4_open_expired,
4960 .recover_lock = nfs4_lock_expired,
4961 .establish_clid = nfs4_init_clientid,
90a16617 4962 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4963};
4964
4965#if defined(CONFIG_NFS_V4_1)
4966struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4967 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4968 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4969 .recover_open = nfs4_open_expired,
4970 .recover_lock = nfs4_lock_expired,
591d71cb 4971 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4972 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4973};
591d71cb 4974#endif /* CONFIG_NFS_V4_1 */
1da177e4 4975
29fba38b
BH		 4976struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4977 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4978 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4979 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4980};
4981
4982#if defined(CONFIG_NFS_V4_1)
4983struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4984 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4985 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4986 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4987};
4988#endif
4989
4990/*
4991 * Per minor version reboot and network partition recovery ops
4992 */
4993
591d71cb
AA		 4994struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4995 &nfs40_reboot_recovery_ops,
4996#if defined(CONFIG_NFS_V4_1)
4997 &nfs41_reboot_recovery_ops,
4998#endif
4999};
5000
5001struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5002 &nfs40_nograce_recovery_ops,
5003#if defined(CONFIG_NFS_V4_1)
5004 &nfs41_nograce_recovery_ops,
5005#endif
5006};
5007
29fba38b
BH		 5008struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5009 &nfs40_state_renewal_ops,
5010#if defined(CONFIG_NFS_V4_1)
5011 &nfs41_state_renewal_ops,
5012#endif
5013};
5014
92e1d5be 5015static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5016 .permission = nfs_permission,
5017 .getattr = nfs_getattr,
5018 .setattr = nfs_setattr,
5019 .getxattr = nfs4_getxattr,
5020 .setxattr = nfs4_setxattr,
5021 .listxattr = nfs4_listxattr,
5022};
5023
509de811 5024const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5025 .version = 4, /* protocol version */
5026 .dentry_ops = &nfs4_dentry_operations,
5027 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5028 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5029 .getroot = nfs4_proc_get_root,
5030 .getattr = nfs4_proc_getattr,
5031 .setattr = nfs4_proc_setattr,
2b3de441 5032 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5033 .lookup = nfs4_proc_lookup,
5034 .access = nfs4_proc_access,
5035 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5036 .create = nfs4_proc_create,
5037 .remove = nfs4_proc_remove,
5038 .unlink_setup = nfs4_proc_unlink_setup,
5039 .unlink_done = nfs4_proc_unlink_done,
5040 .rename = nfs4_proc_rename,
5041 .link = nfs4_proc_link,
5042 .symlink = nfs4_proc_symlink,
5043 .mkdir = nfs4_proc_mkdir,
5044 .rmdir = nfs4_proc_remove,
5045 .readdir = nfs4_proc_readdir,
5046 .mknod = nfs4_proc_mknod,
5047 .statfs = nfs4_proc_statfs,
5048 .fsinfo = nfs4_proc_fsinfo,
5049 .pathconf = nfs4_proc_pathconf,
e9326dca 5050 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5051 .decode_dirent = nfs4_decode_dirent,
5052 .read_setup = nfs4_proc_read_setup,
ec06c096 5053 .read_done = nfs4_read_done,
1da177e4 5054 .write_setup = nfs4_proc_write_setup,
788e7a89 5055 .write_done = nfs4_write_done,
1da177e4 5056 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5057 .commit_done = nfs4_commit_done,
1da177e4 5058 .lock = nfs4_proc_lock,
e50a1c2e 5059 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5060 .close_context = nfs4_close_context,
1da177e4
LT		 5061};
5062
5063/*
5064 * Local variables:
5065 * c-basic-offset: 8
5066 * End:
5067 */
Linux 6.x block layer and io_uring tree(s)