projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4: Ensure nfs_dns_lookup() and nfs_dns_update() are declared static
[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
a9ed2e25 1491static 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);
a9ed2e25
TM		 1499 switch (err) {
1500 default:
1501 goto out;
1502 case -NFS4ERR_GRACE:
1503 case -NFS4ERR_DELAY:
1504 nfs4_handle_exception(server, err, &exception);
1505 err = 0;
1506 }
202b50dc 1507 } while (exception.retry);
a9ed2e25 1508out:
202b50dc
TM		 1509 return err;
1510}
1511
1da177e4
LT		 1512static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1513{
1da177e4 1514 struct nfs_open_context *ctx;
864472e9 1515 int ret;
1da177e4 1516
864472e9
TM		 1517 ctx = nfs4_state_find_open_context(state);
1518 if (IS_ERR(ctx))
1519 return PTR_ERR(ctx);
539cd03a 1520 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1521 put_nfs_open_context(ctx);
1522 return ret;
1da177e4
LT		 1523}
1524
aa53ed54
JL		 1525/*
1526 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1527 * fields corresponding to attributes that were used to store the verifier.
1528 * Make sure we clobber those fields in the later setattr call
1529 */
1530static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1531{
1532 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1533 !(sattr->ia_valid & ATTR_ATIME_SET))
1534 sattr->ia_valid |= ATTR_ATIME;
1535
1536 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1537 !(sattr->ia_valid & ATTR_MTIME_SET))
1538 sattr->ia_valid |= ATTR_MTIME;
1539}
1540
1da177e4 1541/*
24ac23ab 1542 * Returns a referenced nfs4_state
1da177e4 1543 */
dc0b027d 1544static 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		 1545{
1546 struct nfs4_state_owner *sp;
1547 struct nfs4_state *state = NULL;
1548 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1549 struct nfs4_opendata *opendata;
aac00a8d 1550 int status;
1da177e4
LT		 1551
1552 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1553 status = -ENOMEM;
1554 if (!(sp = nfs4_get_state_owner(server, cred))) {
1555 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1556 goto out_err;
1557 }
58d9714a
TM		 1558 status = nfs4_recover_expired_lease(server);
1559 if (status != 0)
b4454fe1 1560 goto err_put_state_owner;
aac00a8d 1561 if (path->dentry->d_inode != NULL)
dc0b027d 1562 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1563 status = -ENOMEM;
dc0b027d 1564 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1565 if (opendata == NULL)
95d35cb4 1566 goto err_put_state_owner;
1da177e4 1567
aac00a8d
TM		 1568 if (path->dentry->d_inode != NULL)
1569 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1570
24ac23ab 1571 status = _nfs4_proc_open(opendata);
1da177e4 1572 if (status != 0)
c6d00e63 1573 goto err_opendata_put;
1da177e4 1574
aa53ed54
JL		 1575 if (opendata->o_arg.open_flags & O_EXCL)
1576 nfs4_exclusive_attrset(opendata, sattr);
1577
24ac23ab 1578 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1579 status = PTR_ERR(state);
1580 if (IS_ERR(state))
c6d00e63 1581 goto err_opendata_put;
c6d00e63 1582 nfs4_opendata_put(opendata);
1da177e4 1583 nfs4_put_state_owner(sp);
1da177e4
LT		 1584 *res = state;
1585 return 0;
c6d00e63
TM		 1586err_opendata_put:
1587 nfs4_opendata_put(opendata);
e56e0b78
TM		 1588err_put_state_owner:
1589 nfs4_put_state_owner(sp);
1da177e4 1590out_err:
1da177e4
LT		 1591 *res = NULL;
1592 return status;
1593}
1594
1595
dc0b027d 1596static 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		 1597{
1598 struct nfs4_exception exception = { };
1599 struct nfs4_state *res;
1600 int status;
1601
1602 do {
dc0b027d 1603 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1604 if (status == 0)
1605 break;
1606 /* NOTE: BAD_SEQID means the server and client disagree about the
1607 * book-keeping w.r.t. state-changing operations
1608 * (OPEN/CLOSE/LOCK/LOCKU...)
1609 * It is actually a sign of a bug on the client or on the server.
1610 *
1611 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1612 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1613 * have unhashed the old state_owner for us, and that we can
1614 * therefore safely retry using a new one. We should still warn
1615 * the user though...
1616 */
1617 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1618 printk(KERN_WARNING "NFS: v4 server %s "
1619 " returned a bad sequence-id error!\n",
1620 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1621 exception.retry = 1;
1622 continue;
1623 }
550f5747
TM		 1624 /*
1625 * BAD_STATEID on OPEN means that the server cancelled our
1626 * state before it received the OPEN_CONFIRM.
1627 * Recover by retrying the request as per the discussion
1628 * on Page 181 of RFC3530.
1629 */
1630 if (status == -NFS4ERR_BAD_STATEID) {
1631 exception.retry = 1;
1632 continue;
1633 }
aac00a8d
TM		 1634 if (status == -EAGAIN) {
1635 /* We must have found a delegation */
1636 exception.retry = 1;
1637 continue;
1638 }
1da177e4
LT		 1639 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1640 status, &exception));
1641 } while (exception.retry);
1642 return res;
1643}
1644
659bfcd6
TM		 1645static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1646 struct nfs_fattr *fattr, struct iattr *sattr,
1647 struct nfs4_state *state)
1da177e4 1648{
3e4f6290 1649 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1650 struct nfs_setattrargs arg = {
3e4f6290 1651 .fh = NFS_FH(inode),
1da177e4
LT		 1652 .iap = sattr,
1653 .server = server,
1654 .bitmask = server->attr_bitmask,
1655 };
1656 struct nfs_setattrres res = {
1657 .fattr = fattr,
1658 .server = server,
1659 };
1660 struct rpc_message msg = {
659bfcd6
TM		 1661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1662 .rpc_argp = &arg,
1663 .rpc_resp = &res,
1664 .rpc_cred = cred,
1da177e4 1665 };
26e976a8 1666 unsigned long timestamp = jiffies;
65e4308d 1667 int status;
1da177e4 1668
0e574af1 1669 nfs_fattr_init(fattr);
1da177e4 1670
3e4f6290
TM		 1671 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1672 /* Use that stateid */
1673 } else if (state != NULL) {
08e9eac4
TM		 1674 nfs4_copy_stateid(&arg.stateid, state, current->files);
1675 } else
1da177e4
LT		 1676 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1677
cccef3b9 1678 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1679 if (status == 0 && state != NULL)
1680 renew_lease(server, timestamp);
65e4308d 1681 return status;
1da177e4
LT		 1682}
1683
659bfcd6
TM		 1684static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1685 struct nfs_fattr *fattr, struct iattr *sattr,
1686 struct nfs4_state *state)
1da177e4 1687{
3e4f6290 1688 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1689 struct nfs4_exception exception = { };
1690 int err;
1691 do {
1692 err = nfs4_handle_exception(server,
659bfcd6 1693 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1694 &exception);
1695 } while (exception.retry);
1696 return err;
1697}
1698
1699struct nfs4_closedata {
4a35bd41 1700 struct path path;
1da177e4
LT		 1701 struct inode *inode;
1702 struct nfs4_state *state;
1703 struct nfs_closeargs arg;
1704 struct nfs_closeres res;
516a6af6 1705 struct nfs_fattr fattr;
26e976a8 1706 unsigned long timestamp;
1da177e4
LT		 1707};
1708
963d8fe5 1709static void nfs4_free_closedata(void *data)
9512135d 1710{
963d8fe5
TM		 1711 struct nfs4_closedata *calldata = data;
1712 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1713
1714 nfs4_put_open_state(calldata->state);
1715 nfs_free_seqid(calldata->arg.seqid);
9512135d 1716 nfs4_put_state_owner(sp);
31f31db1 1717 path_put(&calldata->path);
9512135d
TM		 1718 kfree(calldata);
1719}
1720
963d8fe5 1721static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1722{
963d8fe5 1723 struct nfs4_closedata *calldata = data;
1da177e4 1724 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1725 struct nfs_server *server = NFS_SERVER(calldata->inode);
1726
19ddab06 1727 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1728 if (RPC_ASSASSINATED(task))
1729 return;
1da177e4
LT		 1730 /* hmm. we are done with the inode, and in the process of freeing
1731 * the state_owner. we keep this around to process errors
1732 */
1da177e4
LT		 1733 switch (task->tk_status) {
1734 case 0:
45328c35 1735 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1736 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1737 break;
1738 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1739 case -NFS4ERR_OLD_STATEID:
1740 case -NFS4ERR_BAD_STATEID:
1da177e4 1741 case -NFS4ERR_EXPIRED:
dc0b027d 1742 if (calldata->arg.fmode == 0)
9e33bed5 1743 break;
1da177e4 1744 default:
9e33bed5 1745 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1746 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1747 return;
1748 }
1749 }
19ddab06 1750 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1751 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1752}
1753
4ce70ada 1754static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1755{
4ce70ada 1756 struct nfs4_closedata *calldata = data;
9512135d 1757 struct nfs4_state *state = calldata->state;
003707c7 1758 int clear_rd, clear_wr, clear_rdwr;
9512135d 1759
963d8fe5 1760 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1761 return;
003707c7 1762
003707c7 1763 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1764 spin_lock(&state->owner->so_lock);
003707c7 1765 /* Calculate the change in open mode */
e7616923 1766 if (state->n_rdwr == 0) {
003707c7 1767 if (state->n_rdonly == 0) {
003707c7
TM		 1768 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1769 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1770 }
1771 if (state->n_wronly == 0) {
003707c7
TM		 1772 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1773 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1774 }
e7616923 1775 }
4cecb76f 1776 spin_unlock(&state->owner->so_lock);
003707c7 1777 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1778 /* Note: exit _without_ calling nfs4_close_done */
1779 task->tk_action = NULL;
9512135d
TM		 1780 return;
1781 }
516a6af6 1782 nfs_fattr_init(calldata->res.fattr);
45328c35 1783 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1784 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1785 calldata->arg.fmode = FMODE_READ;
45328c35 1786 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1787 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1788 calldata->arg.fmode = FMODE_WRITE;
45328c35 1789 }
26e976a8 1790 calldata->timestamp = jiffies;
19ddab06
AA		 1791 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1792 &calldata->arg.seq_args, &calldata->res.seq_res,
1793 1, task))
1794 return;
5138fde0 1795 rpc_call_start(task);
1da177e4
LT		 1796}
1797
963d8fe5 1798static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1799 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1800 .rpc_call_done = nfs4_close_done,
1801 .rpc_release = nfs4_free_closedata,
1802};
1803
1da177e4
LT		 1804/*
1805 * It is possible for data to be read/written from a mem-mapped file
1806 * after the sys_close call (which hits the vfs layer as a flush).
1807 * This means that we can't safely call nfsv4 close on a file until
1808 * the inode is cleared. This in turn means that we are not good
1809 * NFSv4 citizens - we do not indicate to the server to update the file's
1810 * share state even when we are done with one of the three share
1811 * stateid's in the inode.
1812 *
1813 * NOTE: Caller must be holding the sp->so_owner semaphore!
1814 */
a49c3c77 1815int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1816{
4a35bd41 1817 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1818 struct nfs4_closedata *calldata;
b39e625b
TM		 1819 struct nfs4_state_owner *sp = state->owner;
1820 struct rpc_task *task;
5138fde0
TM		 1821 struct rpc_message msg = {
1822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1823 .rpc_cred = state->owner->so_cred,
1824 };
c970aa85
TM		 1825 struct rpc_task_setup task_setup_data = {
1826 .rpc_client = server->client,
5138fde0 1827 .rpc_message = &msg,
c970aa85 1828 .callback_ops = &nfs4_close_ops,
101070ca 1829 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1830 .flags = RPC_TASK_ASYNC,
1831 };
9512135d 1832 int status = -ENOMEM;
1da177e4 1833
19ddab06 1834 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1835 if (calldata == NULL)
9512135d 1836 goto out;
4a35bd41 1837 calldata->inode = state->inode;
1da177e4 1838 calldata->state = state;
4a35bd41 1839 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1840 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1841 if (nfs4_has_session(server->nfs_client))
1842 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1843 /* Serialization for the sequence id */
cee54fc9 1844 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1845 if (calldata->arg.seqid == NULL)
1846 goto out_free_calldata;
dc0b027d 1847 calldata->arg.fmode = 0;
a65318bf 1848 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1849 calldata->res.fattr = &calldata->fattr;
c1d51931 1850 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1851 calldata->res.server = server;
5f7dbd5c 1852 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1853 calldata->path.mnt = mntget(path->mnt);
1854 calldata->path.dentry = dget(path->dentry);
9512135d 1855
5138fde0
TM		 1856 msg.rpc_argp = &calldata->arg,
1857 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1858 task_setup_data.callback_data = calldata;
1859 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1860 if (IS_ERR(task))
1861 return PTR_ERR(task);
a49c3c77
TM		 1862 status = 0;
1863 if (wait)
1864 status = rpc_wait_for_completion_task(task);
b39e625b 1865 rpc_put_task(task);
a49c3c77 1866 return status;
9512135d
TM		 1867out_free_calldata:
1868 kfree(calldata);
1869out:
b39e625b
TM		 1870 nfs4_put_open_state(state);
1871 nfs4_put_state_owner(sp);
9512135d 1872 return status;
1da177e4
LT		 1873}
1874
dc0b027d 1875static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1876{
1877 struct file *filp;
1b45c46c 1878 int ret;
02a913a7 1879
1b45c46c 1880 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1881 if (fmode & FMODE_EXEC) {
af22f94a 1882 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1883 state->owner->so_cred,
1884 nd->intent.open.flags);
1885 if (ret < 0)
1886 goto out_close;
1887 }
4a35bd41 1888 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1889 if (!IS_ERR(filp)) {
1890 struct nfs_open_context *ctx;
cd3758e3 1891 ctx = nfs_file_open_context(filp);
02a913a7 1892 ctx->state = state;
95cf959b
TM		 1893 return 0;
1894 }
1b45c46c
TM		 1895 ret = PTR_ERR(filp);
1896out_close:
dc0b027d 1897 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1898 return ret;
02a913a7
TM		 1899}
1900
1901struct dentry *
1da177e4
LT		 1902nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1903{
ad389da7 1904 struct path path = {
4ac91378 1905 .mnt = nd->path.mnt,
ad389da7
TM		 1906 .dentry = dentry,
1907 };
4ac91378 1908 struct dentry *parent;
1da177e4
LT		 1909 struct iattr attr;
1910 struct rpc_cred *cred;
1911 struct nfs4_state *state;
02a913a7 1912 struct dentry *res;
dc0b027d 1913 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1914
1915 if (nd->flags & LOOKUP_CREATE) {
1916 attr.ia_mode = nd->intent.open.create_mode;
1917 attr.ia_valid = ATTR_MODE;
1918 if (!IS_POSIXACL(dir))
ce3b0f8d 1919 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1920 } else {
1921 attr.ia_valid = 0;
1922 BUG_ON(nd->intent.open.flags & O_CREAT);
1923 }
1924
98a8e323 1925 cred = rpc_lookup_cred();
1da177e4 1926 if (IS_ERR(cred))
02a913a7 1927 return (struct dentry *)cred;
565277f6
TM		 1928 parent = dentry->d_parent;
1929 /* Protect against concurrent sillydeletes */
1930 nfs_block_sillyrename(parent);
dc0b027d 1931 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1932 put_rpccred(cred);
02a913a7 1933 if (IS_ERR(state)) {
d75340cc 1934 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1935 d_add(dentry, NULL);
d75340cc
TM		 1936 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1937 }
565277f6 1938 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1939 return (struct dentry *)state;
1940 }
24ac23ab 1941 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1942 if (res != NULL)
deee9369 1943 path.dentry = res;
d75340cc 1944 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1945 nfs_unblock_sillyrename(parent);
dc0b027d 1946 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1947 return res;
1da177e4
LT		 1948}
1949
1950int
02a913a7 1951nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1952{
ad389da7 1953 struct path path = {
4ac91378 1954 .mnt = nd->path.mnt,
ad389da7
TM		 1955 .dentry = dentry,
1956 };
1da177e4
LT		 1957 struct rpc_cred *cred;
1958 struct nfs4_state *state;
dc0b027d 1959 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1960
98a8e323 1961 cred = rpc_lookup_cred();
1da177e4
LT		 1962 if (IS_ERR(cred))
1963 return PTR_ERR(cred);
dc0b027d 1964 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1965 put_rpccred(cred);
02a913a7
TM		 1966 if (IS_ERR(state)) {
1967 switch (PTR_ERR(state)) {
1968 case -EPERM:
1969 case -EACCES:
1970 case -EDQUOT:
1971 case -ENOSPC:
1972 case -EROFS:
1973 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1974 return 1;
b87c0adf
CL		 1975 default:
1976 goto out_drop;
02a913a7 1977 }
02a913a7 1978 }
24ac23ab 1979 if (state->inode == dentry->d_inode) {
d75340cc 1980 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1981 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1982 return 1;
1983 }
dc0b027d 1984 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1985out_drop:
1986 d_drop(dentry);
1da177e4
LT		 1987 return 0;
1988}
1989
7fe5c398
TM		 1990void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1991{
1992 if (ctx->state == NULL)
1993 return;
1994 if (is_sync)
1995 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1996 else
1997 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1998}
1da177e4
LT		 1999
2000static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2001{
43652ad5
BH		 2002 struct nfs4_server_caps_arg args = {
2003 .fhandle = fhandle,
2004 };
1da177e4
LT		 2005 struct nfs4_server_caps_res res = {};
2006 struct rpc_message msg = {
2007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2008 .rpc_argp = &args,
1da177e4
LT		 2009 .rpc_resp = &res,
2010 };
2011 int status;
2012
cccef3b9 2013 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2014 if (status == 0) {
2015 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2016 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2017 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2018 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2019 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2020 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2021 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2022 server->caps |= NFS_CAP_ACLS;
2023 if (res.has_links != 0)
2024 server->caps |= NFS_CAP_HARDLINKS;
2025 if (res.has_symlinks != 0)
2026 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2027 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2028 server->caps |= NFS_CAP_FILEID;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2030 server->caps |= NFS_CAP_MODE;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2032 server->caps |= NFS_CAP_NLINK;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2034 server->caps |= NFS_CAP_OWNER;
2035 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2036 server->caps |= NFS_CAP_OWNER_GROUP;
2037 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2038 server->caps |= NFS_CAP_ATIME;
2039 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2040 server->caps |= NFS_CAP_CTIME;
2041 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2042 server->caps |= NFS_CAP_MTIME;
2043
a65318bf
TM		 2044 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2045 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2046 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2047 server->acl_bitmask = res.acl_bitmask;
2048 }
cccef3b9 2049
1da177e4
LT		 2050 return status;
2051}
2052
55a97593 2053int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2054{
2055 struct nfs4_exception exception = { };
2056 int err;
2057 do {
2058 err = nfs4_handle_exception(server,
2059 _nfs4_server_capabilities(server, fhandle),
2060 &exception);
2061 } while (exception.retry);
2062 return err;
2063}
2064
2065static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2066 struct nfs_fsinfo *info)
2067{
1da177e4
LT		 2068 struct nfs4_lookup_root_arg args = {
2069 .bitmask = nfs4_fattr_bitmap,
2070 };
2071 struct nfs4_lookup_res res = {
2072 .server = server,
0e574af1 2073 .fattr = info->fattr,
1da177e4
LT		 2074 .fh = fhandle,
2075 };
2076 struct rpc_message msg = {
2077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2078 .rpc_argp = &args,
2079 .rpc_resp = &res,
2080 };
008f55d0 2081
0e574af1 2082 nfs_fattr_init(info->fattr);
fccba804 2083 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2084}
2085
2086static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2087 struct nfs_fsinfo *info)
2088{
2089 struct nfs4_exception exception = { };
2090 int err;
2091 do {
2092 err = nfs4_handle_exception(server,
2093 _nfs4_lookup_root(server, fhandle, info),
2094 &exception);
2095 } while (exception.retry);
2096 return err;
2097}
2098
54ceac45
DH		 2099/*
2100 * get the file handle for the "/" directory on the server
2101 */
1da177e4 2102static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2103 struct nfs_fsinfo *info)
1da177e4 2104{
1da177e4
LT		 2105 int status;
2106
1da177e4 2107 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2108 if (status == 0)
2109 status = nfs4_server_capabilities(server, fhandle);
2110 if (status == 0)
2111 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2112 return nfs4_map_errors(status);
1da177e4
LT		 2113}
2114
6b97fd3d
MN		 2115/*
2116 * Get locations and (maybe) other attributes of a referral.
2117 * Note that we'll actually follow the referral later when
2118 * we detect fsid mismatch in inode revalidation
2119 */
56659e99 2120static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2121{
2122 int status = -ENOMEM;
2123 struct page *page = NULL;
2124 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2125
2126 page = alloc_page(GFP_KERNEL);
2127 if (page == NULL)
2128 goto out;
2129 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2130 if (locations == NULL)
2131 goto out;
2132
c228fd3a 2133 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2134 if (status != 0)
2135 goto out;
2136 /* Make sure server returned a different fsid for the referral */
2137 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2138 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2139 status = -EIO;
2140 goto out;
2141 }
2142
2143 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2144 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2145 if (!fattr->mode)
2146 fattr->mode = S_IFDIR;
2147 memset(fhandle, 0, sizeof(struct nfs_fh));
2148out:
2149 if (page)
2150 __free_page(page);
2151 if (locations)
2152 kfree(locations);
2153 return status;
2154}
2155
1da177e4
LT		 2156static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2157{
2158 struct nfs4_getattr_arg args = {
2159 .fh = fhandle,
2160 .bitmask = server->attr_bitmask,
2161 };
2162 struct nfs4_getattr_res res = {
2163 .fattr = fattr,
2164 .server = server,
2165 };
2166 struct rpc_message msg = {
2167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2168 .rpc_argp = &args,
2169 .rpc_resp = &res,
2170 };
2171
0e574af1 2172 nfs_fattr_init(fattr);
cccef3b9 2173 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2174}
2175
2176static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2177{
2178 struct nfs4_exception exception = { };
2179 int err;
2180 do {
2181 err = nfs4_handle_exception(server,
2182 _nfs4_proc_getattr(server, fhandle, fattr),
2183 &exception);
2184 } while (exception.retry);
2185 return err;
2186}
2187
2188/*
2189 * The file is not closed if it is opened due to the a request to change
2190 * the size of the file. The open call will not be needed once the
2191 * VFS layer lookup-intents are implemented.
2192 *
2193 * Close is called when the inode is destroyed.
2194 * If we haven't opened the file for O_WRONLY, we
2195 * need to in the size_change case to obtain a stateid.
2196 *
2197 * Got race?
2198 * Because OPEN is always done by name in nfsv4, it is
2199 * possible that we opened a different file by the same
2200 * name. We can recognize this race condition, but we
2201 * can't do anything about it besides returning an error.
2202 *
2203 * This will be fixed with VFS changes (lookup-intent).
2204 */
2205static int
2206nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2207 struct iattr *sattr)
2208{
08e9eac4 2209 struct inode *inode = dentry->d_inode;
659bfcd6 2210 struct rpc_cred *cred = NULL;
d530838b 2211 struct nfs4_state *state = NULL;
1da177e4
LT		 2212 int status;
2213
0e574af1 2214 nfs_fattr_init(fattr);
1da177e4 2215
d530838b 2216 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2217 if (sattr->ia_valid & ATTR_FILE) {
2218 struct nfs_open_context *ctx;
2219
2220 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2221 if (ctx) {
2222 cred = ctx->cred;
2223 state = ctx->state;
2224 }
659bfcd6 2225 }
08e9eac4 2226
659bfcd6 2227 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2228 if (status == 0)
2229 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2230 return status;
2231}
2232
56659e99
TM		 2233static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2234 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2235 struct nfs_fattr *fattr)
2236{
2237 int status;
2238 struct nfs4_lookup_arg args = {
2239 .bitmask = server->attr_bitmask,
2240 .dir_fh = dirfh,
2241 .name = name,
2242 };
2243 struct nfs4_lookup_res res = {
2244 .server = server,
2245 .fattr = fattr,
2246 .fh = fhandle,
2247 };
2248 struct rpc_message msg = {
2249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2250 .rpc_argp = &args,
2251 .rpc_resp = &res,
2252 };
2253
2254 nfs_fattr_init(fattr);
2255
2256 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2257 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2258 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2259 return status;
2260}
2261
2262static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2263 struct qstr *name, struct nfs_fh *fhandle,
2264 struct nfs_fattr *fattr)
2265{
2266 struct nfs4_exception exception = { };
2267 int err;
2268 do {
4e56e082
TM		 2269 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2270 /* FIXME: !!!! */
2271 if (err == -NFS4ERR_MOVED) {
2272 err = -EREMOTE;
2273 break;
2274 }
2275 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2276 } while (exception.retry);
2277 return err;
2278}
2279
56659e99 2280static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2281 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2282{
4e56e082 2283 int status;
1da177e4
LT		 2284
2285 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2286 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2287 if (status == -NFS4ERR_MOVED)
2288 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2289 dprintk("NFS reply lookup: %d\n", status);
2290 return status;
2291}
2292
2293static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2294{
2295 struct nfs4_exception exception = { };
2296 int err;
2297 do {
2298 err = nfs4_handle_exception(NFS_SERVER(dir),
2299 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2300 &exception);
2301 } while (exception.retry);
2302 return err;
2303}
2304
2305static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2306{
76b32999
TM		 2307 struct nfs_server *server = NFS_SERVER(inode);
2308 struct nfs_fattr fattr;
1da177e4
LT		 2309 struct nfs4_accessargs args = {
2310 .fh = NFS_FH(inode),
76b32999
TM		 2311 .bitmask = server->attr_bitmask,
2312 };
2313 struct nfs4_accessres res = {
2314 .server = server,
2315 .fattr = &fattr,
1da177e4 2316 };
1da177e4
LT		 2317 struct rpc_message msg = {
2318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2319 .rpc_argp = &args,
2320 .rpc_resp = &res,
2321 .rpc_cred = entry->cred,
2322 };
2323 int mode = entry->mask;
2324 int status;
2325
2326 /*
2327 * Determine which access bits we want to ask for...
2328 */
2329 if (mode & MAY_READ)
2330 args.access |= NFS4_ACCESS_READ;
2331 if (S_ISDIR(inode->i_mode)) {
2332 if (mode & MAY_WRITE)
2333 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2334 if (mode & MAY_EXEC)
2335 args.access |= NFS4_ACCESS_LOOKUP;
2336 } else {
2337 if (mode & MAY_WRITE)
2338 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2339 if (mode & MAY_EXEC)
2340 args.access |= NFS4_ACCESS_EXECUTE;
2341 }
76b32999 2342 nfs_fattr_init(&fattr);
cccef3b9 2343 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2344 if (!status) {
2345 entry->mask = 0;
2346 if (res.access & NFS4_ACCESS_READ)
2347 entry->mask |= MAY_READ;
2348 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2349 entry->mask |= MAY_WRITE;
2350 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2351 entry->mask |= MAY_EXEC;
76b32999 2352 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2353 }
2354 return status;
2355}
2356
2357static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2358{
2359 struct nfs4_exception exception = { };
2360 int err;
2361 do {
2362 err = nfs4_handle_exception(NFS_SERVER(inode),
2363 _nfs4_proc_access(inode, entry),
2364 &exception);
2365 } while (exception.retry);
2366 return err;
2367}
2368
2369/*
2370 * TODO: For the time being, we don't try to get any attributes
2371 * along with any of the zero-copy operations READ, READDIR,
2372 * READLINK, WRITE.
2373 *
2374 * In the case of the first three, we want to put the GETATTR
2375 * after the read-type operation -- this is because it is hard
2376 * to predict the length of a GETATTR response in v4, and thus
2377 * align the READ data correctly. This means that the GETATTR
2378 * may end up partially falling into the page cache, and we should
2379 * shift it into the 'tail' of the xdr_buf before processing.
2380 * To do this efficiently, we need to know the total length
2381 * of data received, which doesn't seem to be available outside
2382 * of the RPC layer.
2383 *
2384 * In the case of WRITE, we also want to put the GETATTR after
2385 * the operation -- in this case because we want to make sure
2386 * we get the post-operation mtime and size. This means that
2387 * we can't use xdr_encode_pages() as written: we need a variant
2388 * of it which would leave room in the 'tail' iovec.
2389 *
2390 * Both of these changes to the XDR layer would in fact be quite
2391 * minor, but I decided to leave them for a subsequent patch.
2392 */
2393static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2394 unsigned int pgbase, unsigned int pglen)
2395{
2396 struct nfs4_readlink args = {
2397 .fh = NFS_FH(inode),
2398 .pgbase = pgbase,
2399 .pglen = pglen,
2400 .pages = &page,
2401 };
f50c7000 2402 struct nfs4_readlink_res res;
1da177e4
LT		 2403 struct rpc_message msg = {
2404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2405 .rpc_argp = &args,
f50c7000 2406 .rpc_resp = &res,
1da177e4
LT		 2407 };
2408
cccef3b9 2409 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2410}
2411
2412static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2413 unsigned int pgbase, unsigned int pglen)
2414{
2415 struct nfs4_exception exception = { };
2416 int err;
2417 do {
2418 err = nfs4_handle_exception(NFS_SERVER(inode),
2419 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2420 &exception);
2421 } while (exception.retry);
2422 return err;
2423}
2424
1da177e4
LT		 2425/*
2426 * Got race?
2427 * We will need to arrange for the VFS layer to provide an atomic open.
2428 * Until then, this create/open method is prone to inefficiency and race
2429 * conditions due to the lookup, create, and open VFS calls from sys_open()
2430 * placed on the wire.
2431 *
2432 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2433 * The file will be opened again in the subsequent VFS open call
2434 * (nfs4_proc_file_open).
2435 *
2436 * The open for read will just hang around to be used by any process that
2437 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2438 */
2439
2440static int
2441nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2442 int flags, struct nameidata *nd)
1da177e4 2443{
ad389da7 2444 struct path path = {
4ac91378 2445 .mnt = nd->path.mnt,
ad389da7
TM		 2446 .dentry = dentry,
2447 };
1da177e4
LT		 2448 struct nfs4_state *state;
2449 struct rpc_cred *cred;
dc0b027d 2450 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2451 int status = 0;
2452
98a8e323 2453 cred = rpc_lookup_cred();
1da177e4
LT		 2454 if (IS_ERR(cred)) {
2455 status = PTR_ERR(cred);
2456 goto out;
2457 }
dc0b027d 2458 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2459 d_drop(dentry);
1da177e4
LT		 2460 if (IS_ERR(state)) {
2461 status = PTR_ERR(state);
659bfcd6 2462 goto out_putcred;
1da177e4 2463 }
d4d9cdcb 2464 d_add(dentry, igrab(state->inode));
d75340cc 2465 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2466 if (flags & O_EXCL) {
2467 struct nfs_fattr fattr;
659bfcd6 2468 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2469 if (status == 0)
65e4308d 2470 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2471 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2472 }
ad389da7 2473 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2474 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2475 else
dc0b027d 2476 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2477out_putcred:
2478 put_rpccred(cred);
1da177e4
LT		 2479out:
2480 return status;
2481}
2482
2483static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2484{
16e42959 2485 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2486 struct nfs_removeargs args = {
1da177e4 2487 .fh = NFS_FH(dir),
4fdc17b2
TM		 2488 .name.len = name->len,
2489 .name.name = name->name,
16e42959
TM		 2490 .bitmask = server->attr_bitmask,
2491 };
4fdc17b2 2492 struct nfs_removeres res = {
16e42959 2493 .server = server,
1da177e4 2494 };
1da177e4 2495 struct rpc_message msg = {
4fdc17b2
TM		 2496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2497 .rpc_argp = &args,
2498 .rpc_resp = &res,
1da177e4
LT		 2499 };
2500 int status;
2501
4fdc17b2 2502 nfs_fattr_init(&res.dir_attr);
cccef3b9 2503 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2504 if (status == 0) {
2505 update_changeattr(dir, &res.cinfo);
4fdc17b2 2506 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2507 }
1da177e4
LT		 2508 return status;
2509}
2510
2511static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2512{
2513 struct nfs4_exception exception = { };
2514 int err;
2515 do {
2516 err = nfs4_handle_exception(NFS_SERVER(dir),
2517 _nfs4_proc_remove(dir, name),
2518 &exception);
2519 } while (exception.retry);
2520 return err;
2521}
2522
e4eff1a6 2523static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2524{
e4eff1a6
TM		 2525 struct nfs_server *server = NFS_SERVER(dir);
2526 struct nfs_removeargs *args = msg->rpc_argp;
2527 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2528
a65318bf 2529 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2530 res->server = server;
1da177e4 2531 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2532}
2533
e4eff1a6 2534static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2535{
e4eff1a6
TM		 2536 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2537
472cfbd9 2538 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2539 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2540 return 0;
472cfbd9 2541 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2542 update_changeattr(dir, &res->cinfo);
2543 nfs_post_op_update_inode(dir, &res->dir_attr);
2544 return 1;
1da177e4
LT		 2545}
2546
2547static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2548 struct inode *new_dir, struct qstr *new_name)
2549{
6caf2c82 2550 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2551 struct nfs4_rename_arg arg = {
2552 .old_dir = NFS_FH(old_dir),
2553 .new_dir = NFS_FH(new_dir),
2554 .old_name = old_name,
2555 .new_name = new_name,
6caf2c82
TM		 2556 .bitmask = server->attr_bitmask,
2557 };
2558 struct nfs_fattr old_fattr, new_fattr;
2559 struct nfs4_rename_res res = {
2560 .server = server,
2561 .old_fattr = &old_fattr,
2562 .new_fattr = &new_fattr,
1da177e4 2563 };
1da177e4
LT		 2564 struct rpc_message msg = {
2565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2566 .rpc_argp = &arg,
2567 .rpc_resp = &res,
2568 };
2569 int status;
2570
6caf2c82
TM		 2571 nfs_fattr_init(res.old_fattr);
2572 nfs_fattr_init(res.new_fattr);
cccef3b9 2573 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2574
2575 if (!status) {
2576 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2577 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2578 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2579 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2580 }
2581 return status;
2582}
2583
2584static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2585 struct inode *new_dir, struct qstr *new_name)
2586{
2587 struct nfs4_exception exception = { };
2588 int err;
2589 do {
2590 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2591 _nfs4_proc_rename(old_dir, old_name,
2592 new_dir, new_name),
2593 &exception);
2594 } while (exception.retry);
2595 return err;
2596}
2597
2598static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2599{
91ba2eee 2600 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2601 struct nfs4_link_arg arg = {
2602 .fh = NFS_FH(inode),
2603 .dir_fh = NFS_FH(dir),
2604 .name = name,
91ba2eee
TM		 2605 .bitmask = server->attr_bitmask,
2606 };
2607 struct nfs_fattr fattr, dir_attr;
2608 struct nfs4_link_res res = {
2609 .server = server,
2610 .fattr = &fattr,
2611 .dir_attr = &dir_attr,
1da177e4 2612 };
1da177e4
LT		 2613 struct rpc_message msg = {
2614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2615 .rpc_argp = &arg,
91ba2eee 2616 .rpc_resp = &res,
1da177e4
LT		 2617 };
2618 int status;
2619
91ba2eee
TM		 2620 nfs_fattr_init(res.fattr);
2621 nfs_fattr_init(res.dir_attr);
cccef3b9 2622 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2623 if (!status) {
2624 update_changeattr(dir, &res.cinfo);
2625 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2626 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2627 }
1da177e4
LT		 2628
2629 return status;
2630}
2631
2632static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2633{
2634 struct nfs4_exception exception = { };
2635 int err;
2636 do {
2637 err = nfs4_handle_exception(NFS_SERVER(inode),
2638 _nfs4_proc_link(inode, dir, name),
2639 &exception);
2640 } while (exception.retry);
2641 return err;
2642}
2643
57dc9a57
TM		 2644struct nfs4_createdata {
2645 struct rpc_message msg;
2646 struct nfs4_create_arg arg;
2647 struct nfs4_create_res res;
2648 struct nfs_fh fh;
2649 struct nfs_fattr fattr;
2650 struct nfs_fattr dir_fattr;
2651};
2652
2653static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2654 struct qstr *name, struct iattr *sattr, u32 ftype)
2655{
2656 struct nfs4_createdata *data;
2657
2658 data = kzalloc(sizeof(*data), GFP_KERNEL);
2659 if (data != NULL) {
2660 struct nfs_server *server = NFS_SERVER(dir);
2661
2662 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2663 data->msg.rpc_argp = &data->arg;
2664 data->msg.rpc_resp = &data->res;
2665 data->arg.dir_fh = NFS_FH(dir);
2666 data->arg.server = server;
2667 data->arg.name = name;
2668 data->arg.attrs = sattr;
2669 data->arg.ftype = ftype;
2670 data->arg.bitmask = server->attr_bitmask;
2671 data->res.server = server;
2672 data->res.fh = &data->fh;
2673 data->res.fattr = &data->fattr;
2674 data->res.dir_fattr = &data->dir_fattr;
2675 nfs_fattr_init(data->res.fattr);
2676 nfs_fattr_init(data->res.dir_fattr);
2677 }
2678 return data;
2679}
2680
2681static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2682{
cccef3b9
AA		 2683 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2684 &data->arg, &data->res, 1);
57dc9a57
TM		 2685 if (status == 0) {
2686 update_changeattr(dir, &data->res.dir_cinfo);
2687 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2688 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2689 }
2690 return status;
2691}
2692
2693static void nfs4_free_createdata(struct nfs4_createdata *data)
2694{
2695 kfree(data);
2696}
2697
4f390c15 2698static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2699 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2700{
57dc9a57
TM		 2701 struct nfs4_createdata *data;
2702 int status = -ENAMETOOLONG;
1da177e4 2703
94a6d753 2704 if (len > NFS4_MAXPATHLEN)
57dc9a57 2705 goto out;
4f390c15 2706
57dc9a57
TM		 2707 status = -ENOMEM;
2708 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2709 if (data == NULL)
2710 goto out;
2711
2712 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2713 data->arg.u.symlink.pages = &page;
2714 data->arg.u.symlink.len = len;
1da177e4 2715
57dc9a57
TM		 2716 status = nfs4_do_create(dir, dentry, data);
2717
2718 nfs4_free_createdata(data);
2719out:
1da177e4
LT		 2720 return status;
2721}
2722
4f390c15 2723static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2724 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2725{
2726 struct nfs4_exception exception = { };
2727 int err;
2728 do {
2729 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2730 _nfs4_proc_symlink(dir, dentry, page,
2731 len, sattr),
1da177e4
LT		 2732 &exception);
2733 } while (exception.retry);
2734 return err;
2735}
2736
2737static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2738 struct iattr *sattr)
2739{
57dc9a57
TM		 2740 struct nfs4_createdata *data;
2741 int status = -ENOMEM;
1da177e4 2742
57dc9a57
TM		 2743 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2744 if (data == NULL)
2745 goto out;
2746
2747 status = nfs4_do_create(dir, dentry, data);
2748
2749 nfs4_free_createdata(data);
2750out:
1da177e4
LT		 2751 return status;
2752}
2753
2754static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2755 struct iattr *sattr)
2756{
2757 struct nfs4_exception exception = { };
2758 int err;
2759 do {
2760 err = nfs4_handle_exception(NFS_SERVER(dir),
2761 _nfs4_proc_mkdir(dir, dentry, sattr),
2762 &exception);
2763 } while (exception.retry);
2764 return err;
2765}
2766
2767static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2768 u64 cookie, struct page *page, unsigned int count, int plus)
2769{
2770 struct inode *dir = dentry->d_inode;
2771 struct nfs4_readdir_arg args = {
2772 .fh = NFS_FH(dir),
2773 .pages = &page,
2774 .pgbase = 0,
2775 .count = count,
96d25e53 2776 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2777 };
2778 struct nfs4_readdir_res res;
2779 struct rpc_message msg = {
2780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2781 .rpc_argp = &args,
2782 .rpc_resp = &res,
2783 .rpc_cred = cred,
2784 };
2785 int status;
2786
3110ff80 2787 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2788 dentry->d_parent->d_name.name,
2789 dentry->d_name.name,
2790 (unsigned long long)cookie);
1da177e4
LT		 2791 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2792 res.pgbase = args.pgbase;
cccef3b9 2793 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2794 if (status == 0)
2795 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2796
2797 nfs_invalidate_atime(dir);
2798
3110ff80 2799 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2800 return status;
2801}
2802
2803static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2804 u64 cookie, struct page *page, unsigned int count, int plus)
2805{
2806 struct nfs4_exception exception = { };
2807 int err;
2808 do {
2809 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2810 _nfs4_proc_readdir(dentry, cred, cookie,
2811 page, count, plus),
2812 &exception);
2813 } while (exception.retry);
2814 return err;
2815}
2816
2817static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2818 struct iattr *sattr, dev_t rdev)
2819{
57dc9a57
TM		 2820 struct nfs4_createdata *data;
2821 int mode = sattr->ia_mode;
2822 int status = -ENOMEM;
1da177e4
LT		 2823
2824 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2825 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2826
2827 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2828 if (data == NULL)
2829 goto out;
2830
1da177e4 2831 if (S_ISFIFO(mode))
57dc9a57 2832 data->arg.ftype = NF4FIFO;
1da177e4 2833 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2834 data->arg.ftype = NF4BLK;
2835 data->arg.u.device.specdata1 = MAJOR(rdev);
2836 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2837 }
2838 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2839 data->arg.ftype = NF4CHR;
2840 data->arg.u.device.specdata1 = MAJOR(rdev);
2841 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2842 }
1da177e4 2843
57dc9a57
TM		 2844 status = nfs4_do_create(dir, dentry, data);
2845
2846 nfs4_free_createdata(data);
2847out:
1da177e4
LT		 2848 return status;
2849}
2850
2851static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2852 struct iattr *sattr, dev_t rdev)
2853{
2854 struct nfs4_exception exception = { };
2855 int err;
2856 do {
2857 err = nfs4_handle_exception(NFS_SERVER(dir),
2858 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2859 &exception);
2860 } while (exception.retry);
2861 return err;
2862}
2863
2864static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2865 struct nfs_fsstat *fsstat)
2866{
2867 struct nfs4_statfs_arg args = {
2868 .fh = fhandle,
2869 .bitmask = server->attr_bitmask,
2870 };
24ad148a
BH		 2871 struct nfs4_statfs_res res = {
2872 .fsstat = fsstat,
2873 };
1da177e4
LT		 2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2876 .rpc_argp = &args,
24ad148a 2877 .rpc_resp = &res,
1da177e4
LT		 2878 };
2879
0e574af1 2880 nfs_fattr_init(fsstat->fattr);
cccef3b9 2881 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2882}
2883
2884static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2885{
2886 struct nfs4_exception exception = { };
2887 int err;
2888 do {
2889 err = nfs4_handle_exception(server,
2890 _nfs4_proc_statfs(server, fhandle, fsstat),
2891 &exception);
2892 } while (exception.retry);
2893 return err;
2894}
2895
2896static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2897 struct nfs_fsinfo *fsinfo)
2898{
2899 struct nfs4_fsinfo_arg args = {
2900 .fh = fhandle,
2901 .bitmask = server->attr_bitmask,
2902 };
3dda5e43
BH		 2903 struct nfs4_fsinfo_res res = {
2904 .fsinfo = fsinfo,
2905 };
1da177e4
LT		 2906 struct rpc_message msg = {
2907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2908 .rpc_argp = &args,
3dda5e43 2909 .rpc_resp = &res,
1da177e4
LT		 2910 };
2911
cccef3b9 2912 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2913}
2914
2915static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2916{
2917 struct nfs4_exception exception = { };
2918 int err;
2919
2920 do {
2921 err = nfs4_handle_exception(server,
2922 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2923 &exception);
2924 } while (exception.retry);
2925 return err;
2926}
2927
2928static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2929{
0e574af1 2930 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2931 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2932}
2933
2934static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2935 struct nfs_pathconf *pathconf)
2936{
2937 struct nfs4_pathconf_arg args = {
2938 .fh = fhandle,
2939 .bitmask = server->attr_bitmask,
2940 };
d45b2989
BH		 2941 struct nfs4_pathconf_res res = {
2942 .pathconf = pathconf,
2943 };
1da177e4
LT		 2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2946 .rpc_argp = &args,
d45b2989 2947 .rpc_resp = &res,
1da177e4
LT		 2948 };
2949
2950 /* None of the pathconf attributes are mandatory to implement */
2951 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2952 memset(pathconf, 0, sizeof(*pathconf));
2953 return 0;
2954 }
2955
0e574af1 2956 nfs_fattr_init(pathconf->fattr);
cccef3b9 2957 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2958}
2959
2960static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2961 struct nfs_pathconf *pathconf)
2962{
2963 struct nfs4_exception exception = { };
2964 int err;
2965
2966 do {
2967 err = nfs4_handle_exception(server,
2968 _nfs4_proc_pathconf(server, fhandle, pathconf),
2969 &exception);
2970 } while (exception.retry);
2971 return err;
2972}
2973
ec06c096 2974static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2975{
ec06c096 2976 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2977
f11c88af
AA		 2978 dprintk("--> %s\n", __func__);
2979
2980 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2981 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2982
9e33bed5 2983 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2984 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2985 return -EAGAIN;
1da177e4 2986 }
8850df99
TM		 2987
2988 nfs_invalidate_atime(data->inode);
1da177e4 2989 if (task->tk_status > 0)
ec06c096
TM		 2990 renew_lease(server, data->timestamp);
2991 return 0;
1da177e4
LT		 2992}
2993
bdc7f021 2994static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2995{
1da177e4 2996 data->timestamp = jiffies;
bdc7f021 2997 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2998}
2999
788e7a89 3000static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3001{
1da177e4
LT		 3002 struct inode *inode = data->inode;
3003
def6ed7e
AA		 3004 /* slot is freed in nfs_writeback_done */
3005 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3006 task->tk_status);
3007
9e33bed5 3008 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 3009 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3010 return -EAGAIN;
1da177e4 3011 }
4f9838c7 3012 if (task->tk_status >= 0) {
1da177e4 3013 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3014 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3015 }
788e7a89 3016 return 0;
1da177e4
LT		 3017}
3018
bdc7f021 3019static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3020{
bdc7f021
TM		 3021 struct nfs_server *server = NFS_SERVER(data->inode);
3022
a65318bf 3023 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3024 data->res.server = server;
1da177e4
LT		 3025 data->timestamp = jiffies;
3026
bdc7f021 3027 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3028}
3029
788e7a89 3030static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3031{
1da177e4
LT		 3032 struct inode *inode = data->inode;
3033
21d9a851
AA		 3034 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3035 task->tk_status);
9e33bed5 3036 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3037 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3038 return -EAGAIN;
1da177e4 3039 }
21d9a851
AA		 3040 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3041 &data->res.seq_res);
9e08a3c5 3042 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3043 return 0;
1da177e4
LT		 3044}
3045
bdc7f021 3046static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3047{
788e7a89 3048 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3049
a65318bf 3050 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3051 data->res.server = server;
bdc7f021 3052 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3053}
3054
3055/*
3056 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3057 * standalone procedure for queueing an asynchronous RENEW.
3058 */
963d8fe5 3059static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3060{
adfa6f98 3061 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3062 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3063
3064 if (task->tk_status < 0) {
95baa25c
TM		 3065 /* Unless we're shutting down, schedule state recovery! */
3066 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3067 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3068 return;
3069 }
3070 spin_lock(&clp->cl_lock);
3071 if (time_before(clp->cl_last_renewal,timestamp))
3072 clp->cl_last_renewal = timestamp;
3073 spin_unlock(&clp->cl_lock);
3074}
3075
963d8fe5
TM		 3076static const struct rpc_call_ops nfs4_renew_ops = {
3077 .rpc_call_done = nfs4_renew_done,
3078};
3079
adfa6f98 3080int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3081{
3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3084 .rpc_argp = clp,
b4454fe1 3085 .rpc_cred = cred,
1da177e4
LT		 3086 };
3087
3088 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3089 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3090}
3091
adfa6f98 3092int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3093{
3094 struct rpc_message msg = {
3095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3096 .rpc_argp = clp,
b4454fe1 3097 .rpc_cred = cred,
1da177e4
LT		 3098 };
3099 unsigned long now = jiffies;
3100 int status;
3101
3102 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3103 if (status < 0)
3104 return status;
3105 spin_lock(&clp->cl_lock);
3106 if (time_before(clp->cl_last_renewal,now))
3107 clp->cl_last_renewal = now;
3108 spin_unlock(&clp->cl_lock);
3109 return 0;
3110}
3111
aa1870af
BF		 3112static inline int nfs4_server_supports_acls(struct nfs_server *server)
3113{
3114 return (server->caps & NFS_CAP_ACLS)
3115 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3116 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3117}
3118
3119/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3120 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3121 * the stack.
3122 */
3123#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3124
3125static void buf_to_pages(const void *buf, size_t buflen,
3126 struct page **pages, unsigned int *pgbase)
3127{
3128 const void *p = buf;
3129
3130 *pgbase = offset_in_page(buf);
3131 p -= *pgbase;
3132 while (p < buf + buflen) {
3133 *(pages++) = virt_to_page(p);
3134 p += PAGE_CACHE_SIZE;
3135 }
3136}
3137
e50a1c2e
BF		 3138struct nfs4_cached_acl {
3139 int cached;
3140 size_t len;
3e9d4154 3141 char data[0];
e50a1c2e
BF		 3142};
3143
3144static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3145{
3146 struct nfs_inode *nfsi = NFS_I(inode);
3147
3148 spin_lock(&inode->i_lock);
3149 kfree(nfsi->nfs4_acl);
3150 nfsi->nfs4_acl = acl;
3151 spin_unlock(&inode->i_lock);
3152}
3153
3154static void nfs4_zap_acl_attr(struct inode *inode)
3155{
3156 nfs4_set_cached_acl(inode, NULL);
3157}
3158
3159static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3160{
3161 struct nfs_inode *nfsi = NFS_I(inode);
3162 struct nfs4_cached_acl *acl;
3163 int ret = -ENOENT;
3164
3165 spin_lock(&inode->i_lock);
3166 acl = nfsi->nfs4_acl;
3167 if (acl == NULL)
3168 goto out;
3169 if (buf == NULL) /* user is just asking for length */
3170 goto out_len;
3171 if (acl->cached == 0)
3172 goto out;
3173 ret = -ERANGE; /* see getxattr(2) man page */
3174 if (acl->len > buflen)
3175 goto out;
3176 memcpy(buf, acl->data, acl->len);
3177out_len:
3178 ret = acl->len;
3179out:
3180 spin_unlock(&inode->i_lock);
3181 return ret;
3182}
3183
3184static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3185{
3186 struct nfs4_cached_acl *acl;
3187
3188 if (buf && acl_len <= PAGE_SIZE) {
3189 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3190 if (acl == NULL)
3191 goto out;
3192 acl->cached = 1;
3193 memcpy(acl->data, buf, acl_len);
3194 } else {
3195 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3196 if (acl == NULL)
3197 goto out;
3198 acl->cached = 0;
3199 }
3200 acl->len = acl_len;
3201out:
3202 nfs4_set_cached_acl(inode, acl);
3203}
3204
16b4289c 3205static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3206{
aa1870af
BF		 3207 struct page *pages[NFS4ACL_MAXPAGES];
3208 struct nfs_getaclargs args = {
3209 .fh = NFS_FH(inode),
3210 .acl_pages = pages,
3211 .acl_len = buflen,
3212 };
663c79b3
BH		 3213 struct nfs_getaclres res = {
3214 .acl_len = buflen,
3215 };
e50a1c2e 3216 void *resp_buf;
aa1870af
BF		 3217 struct rpc_message msg = {
3218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3219 .rpc_argp = &args,
663c79b3 3220 .rpc_resp = &res,
aa1870af 3221 };
e50a1c2e 3222 struct page *localpage = NULL;
aa1870af
BF		 3223 int ret;
3224
e50a1c2e
BF		 3225 if (buflen < PAGE_SIZE) {
3226 /* As long as we're doing a round trip to the server anyway,
3227 * let's be prepared for a page of acl data. */
3228 localpage = alloc_page(GFP_KERNEL);
3229 resp_buf = page_address(localpage);
3230 if (localpage == NULL)
3231 return -ENOMEM;
3232 args.acl_pages[0] = localpage;
3233 args.acl_pgbase = 0;
663c79b3 3234 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3235 } else {
3236 resp_buf = buf;
3237 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3238 }
cccef3b9 3239 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3240 if (ret)
3241 goto out_free;
663c79b3
BH		 3242 if (res.acl_len > args.acl_len)
3243 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3244 else
663c79b3 3245 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3246 if (buf) {
3247 ret = -ERANGE;
663c79b3 3248 if (res.acl_len > buflen)
e50a1c2e
BF		 3249 goto out_free;
3250 if (localpage)
663c79b3 3251 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3252 }
663c79b3 3253 ret = res.acl_len;
e50a1c2e
BF		 3254out_free:
3255 if (localpage)
3256 __free_page(localpage);
aa1870af
BF		 3257 return ret;
3258}
3259
16b4289c
TM		 3260static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3261{
3262 struct nfs4_exception exception = { };
3263 ssize_t ret;
3264 do {
3265 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3266 if (ret >= 0)
3267 break;
3268 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3269 } while (exception.retry);
3270 return ret;
3271}
3272
e50a1c2e
BF		 3273static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3274{
3275 struct nfs_server *server = NFS_SERVER(inode);
3276 int ret;
3277
3278 if (!nfs4_server_supports_acls(server))
3279 return -EOPNOTSUPP;
3280 ret = nfs_revalidate_inode(server, inode);
3281 if (ret < 0)
3282 return ret;
3283 ret = nfs4_read_cached_acl(inode, buf, buflen);
3284 if (ret != -ENOENT)
3285 return ret;
3286 return nfs4_get_acl_uncached(inode, buf, buflen);
3287}
3288
16b4289c 3289static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3290{
3291 struct nfs_server *server = NFS_SERVER(inode);
3292 struct page *pages[NFS4ACL_MAXPAGES];
3293 struct nfs_setaclargs arg = {
3294 .fh = NFS_FH(inode),
3295 .acl_pages = pages,
3296 .acl_len = buflen,
3297 };
73c403a9 3298 struct nfs_setaclres res;
4b580ee3
BF		 3299 struct rpc_message msg = {
3300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3301 .rpc_argp = &arg,
73c403a9 3302 .rpc_resp = &res,
4b580ee3
BF		 3303 };
3304 int ret;
3305
3306 if (!nfs4_server_supports_acls(server))
3307 return -EOPNOTSUPP;
642ac549 3308 nfs_inode_return_delegation(inode);
4b580ee3 3309 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3310 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3311 nfs_access_zap_cache(inode);
3312 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3313 return ret;
3314}
3315
16b4289c
TM		 3316static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3317{
3318 struct nfs4_exception exception = { };
3319 int err;
3320 do {
3321 err = nfs4_handle_exception(NFS_SERVER(inode),
3322 __nfs4_proc_set_acl(inode, buf, buflen),
3323 &exception);
3324 } while (exception.retry);
3325 return err;
3326}
3327
1da177e4 3328static int
8328d59f 3329_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3330{
1da177e4
LT		 3331 if (!clp || task->tk_status >= 0)
3332 return 0;
3333 switch(task->tk_status) {
9e33bed5
TM		 3334 case -NFS4ERR_ADMIN_REVOKED:
3335 case -NFS4ERR_BAD_STATEID:
3336 case -NFS4ERR_OPENMODE:
3337 if (state == NULL)
3338 break;
3339 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3340 case -NFS4ERR_STALE_CLIENTID:
3341 case -NFS4ERR_STALE_STATEID:
3342 case -NFS4ERR_EXPIRED:
5d00837b 3343 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3344 nfs4_schedule_state_recovery(clp);
e005e804 3345 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3346 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3347 task->tk_status = 0;
3348 return -EAGAIN;
4745e315
AA		 3349#if defined(CONFIG_NFS_V4_1)
3350 case -NFS4ERR_BADSESSION:
3351 case -NFS4ERR_BADSLOT:
3352 case -NFS4ERR_BAD_HIGH_SLOT:
3353 case -NFS4ERR_DEADSESSION:
3354 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3355 case -NFS4ERR_SEQ_FALSE_RETRY:
3356 case -NFS4ERR_SEQ_MISORDERED:
3357 dprintk("%s ERROR %d, Reset session\n", __func__,
3358 task->tk_status);
3359 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3360 task->tk_status = 0;
3361 return -EAGAIN;
3362#endif /* CONFIG_NFS_V4_1 */
1da177e4 3363 case -NFS4ERR_DELAY:
8328d59f
AA		 3364 if (server)
3365 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3366 case -NFS4ERR_GRACE:
1da177e4
LT		 3367 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3368 task->tk_status = 0;
3369 return -EAGAIN;
3370 case -NFS4ERR_OLD_STATEID:
3371 task->tk_status = 0;
3372 return -EAGAIN;
3373 }
3374 task->tk_status = nfs4_map_errors(task->tk_status);
3375 return 0;
3376}
3377
8328d59f
AA		 3378static int
3379nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3380{
3381 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3382}
3383
adfa6f98 3384int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3385{
3386 nfs4_verifier sc_verifier;
3387 struct nfs4_setclientid setclientid = {
3388 .sc_verifier = &sc_verifier,
3389 .sc_prog = program,
3390 };
3391 struct rpc_message msg = {
3392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3393 .rpc_argp = &setclientid,
3394 .rpc_resp = clp,
286d7d6a 3395 .rpc_cred = cred,
1da177e4 3396 };
bc4785cd 3397 __be32 *p;
1da177e4
LT		 3398 int loop = 0;
3399 int status;
3400
bc4785cd 3401 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3402 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3403 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3404
3405 for(;;) {
3406 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3407 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3408 clp->cl_ipaddr,
3409 rpc_peeraddr2str(clp->cl_rpcclient,
3410 RPC_DISPLAY_ADDR),
69dd716c
TM		 3411 rpc_peeraddr2str(clp->cl_rpcclient,
3412 RPC_DISPLAY_PROTO),
78ea323b 3413 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3414 clp->cl_id_uniquifier);
3415 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3416 sizeof(setclientid.sc_netid),
3417 rpc_peeraddr2str(clp->cl_rpcclient,
3418 RPC_DISPLAY_NETID));
1da177e4 3419 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3420 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3421 clp->cl_ipaddr, port >> 8, port & 255);
3422
3423 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3424 if (status != -NFS4ERR_CLID_INUSE)
3425 break;
3426 if (signalled())
3427 break;
3428 if (loop++ & 1)
3429 ssleep(clp->cl_lease_time + 1);
3430 else
3431 if (++clp->cl_id_uniquifier == 0)
3432 break;
3433 }
3434 return status;
3435}
3436
adfa6f98 3437static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3438{
3439 struct nfs_fsinfo fsinfo;
3440 struct rpc_message msg = {
3441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3442 .rpc_argp = clp,
3443 .rpc_resp = &fsinfo,
286d7d6a 3444 .rpc_cred = cred,
1da177e4
LT		 3445 };
3446 unsigned long now;
3447 int status;
3448
3449 now = jiffies;
3450 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3451 if (status == 0) {
3452 spin_lock(&clp->cl_lock);
3453 clp->cl_lease_time = fsinfo.lease_time * HZ;
3454 clp->cl_last_renewal = now;
3455 spin_unlock(&clp->cl_lock);
3456 }
3457 return status;
3458}
3459
adfa6f98 3460int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3461{
77e03677 3462 long timeout = 0;
51581f3b
TM		 3463 int err;
3464 do {
3465 err = _nfs4_proc_setclientid_confirm(clp, cred);
3466 switch (err) {
3467 case 0:
3468 return err;
3469 case -NFS4ERR_RESOURCE:
3470 /* The IBM lawyers misread another document! */
3471 case -NFS4ERR_DELAY:
3472 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3473 }
3474 } while (err == 0);
3475 return err;
3476}
3477
fe650407
TM		 3478struct nfs4_delegreturndata {
3479 struct nfs4_delegreturnargs args;
fa178f29 3480 struct nfs4_delegreturnres res;
fe650407
TM		 3481 struct nfs_fh fh;
3482 nfs4_stateid stateid;
26e976a8 3483 unsigned long timestamp;
fa178f29 3484 struct nfs_fattr fattr;
fe650407
TM		 3485 int rpc_status;
3486};
3487
fe650407
TM		 3488static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3489{
3490 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3491
3492 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3493 task->tk_status);
3494
fe650407 3495 data->rpc_status = task->tk_status;
26e976a8 3496 if (data->rpc_status == 0)
fa178f29 3497 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3498}
3499
3500static void nfs4_delegreturn_release(void *calldata)
3501{
fe650407
TM		 3502 kfree(calldata);
3503}
3504
938e1010
AA		 3505#if defined(CONFIG_NFS_V4_1)
3506static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3507{
3508 struct nfs4_delegreturndata *d_data;
3509
3510 d_data = (struct nfs4_delegreturndata *)data;
3511
3512 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3513 &d_data->args.seq_args,
3514 &d_data->res.seq_res, 1, task))
3515 return;
3516 rpc_call_start(task);
3517}
3518#endif /* CONFIG_NFS_V4_1 */
3519
c8d149f3 3520static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3521#if defined(CONFIG_NFS_V4_1)
3522 .rpc_call_prepare = nfs4_delegreturn_prepare,
3523#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3524 .rpc_call_done = nfs4_delegreturn_done,
3525 .rpc_release = nfs4_delegreturn_release,
3526};
3527
e6f81075 3528static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3529{
3530 struct nfs4_delegreturndata *data;
fa178f29 3531 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3532 struct rpc_task *task;
5138fde0
TM		 3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3535 .rpc_cred = cred,
3536 };
c970aa85
TM		 3537 struct rpc_task_setup task_setup_data = {
3538 .rpc_client = server->client,
5138fde0 3539 .rpc_message = &msg,
c970aa85
TM		 3540 .callback_ops = &nfs4_delegreturn_ops,
3541 .flags = RPC_TASK_ASYNC,
3542 };
e6f81075 3543 int status = 0;
fe650407 3544
938e1010 3545 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3546 if (data == NULL)
3547 return -ENOMEM;
3548 data->args.fhandle = &data->fh;
3549 data->args.stateid = &data->stateid;
fa178f29 3550 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3551 nfs_copy_fh(&data->fh, NFS_FH(inode));
3552 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3553 data->res.fattr = &data->fattr;
3554 data->res.server = server;
5f7dbd5c 3555 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3556 nfs_fattr_init(data->res.fattr);
26e976a8 3557 data->timestamp = jiffies;
fe650407
TM		 3558 data->rpc_status = 0;
3559
c970aa85 3560 task_setup_data.callback_data = data;
5138fde0
TM		 3561 msg.rpc_argp = &data->args,
3562 msg.rpc_resp = &data->res,
c970aa85 3563 task = rpc_run_task(&task_setup_data);
7a1218a2 3564 if (IS_ERR(task))
fe650407 3565 return PTR_ERR(task);
e6f81075
TM		 3566 if (!issync)
3567 goto out;
fe650407 3568 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3569 if (status != 0)
3570 goto out;
3571 status = data->rpc_status;
3572 if (status != 0)
3573 goto out;
3574 nfs_refresh_inode(inode, &data->fattr);
3575out:
e6b3c4db 3576 rpc_put_task(task);
fe650407 3577 return status;
1da177e4
LT		 3578}
3579
e6f81075 3580int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3581{
3582 struct nfs_server *server = NFS_SERVER(inode);
3583 struct nfs4_exception exception = { };
3584 int err;
3585 do {
e6f81075 3586 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3587 switch (err) {
3588 case -NFS4ERR_STALE_STATEID:
3589 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3590 case 0:
3591 return 0;
3592 }
3593 err = nfs4_handle_exception(server, err, &exception);
3594 } while (exception.retry);
3595 return err;
3596}
3597
3598#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3599#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3600
3601/*
3602 * sleep, with exponential backoff, and retry the LOCK operation.
3603 */
3604static unsigned long
3605nfs4_set_lock_task_retry(unsigned long timeout)
3606{
150030b7 3607 schedule_timeout_killable(timeout);
1da177e4
LT		 3608 timeout <<= 1;
3609 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3610 return NFS4_LOCK_MAXTIMEOUT;
3611 return timeout;
3612}
3613
1da177e4
LT		 3614static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3615{
3616 struct inode *inode = state->inode;
3617 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3618 struct nfs_client *clp = server->nfs_client;
911d1aaf 3619 struct nfs_lockt_args arg = {
1da177e4 3620 .fh = NFS_FH(inode),
911d1aaf 3621 .fl = request,
1da177e4 3622 };
911d1aaf
TM		 3623 struct nfs_lockt_res res = {
3624 .denied = request,
1da177e4
LT		 3625 };
3626 struct rpc_message msg = {
3627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3628 .rpc_argp = &arg,
3629 .rpc_resp = &res,
3630 .rpc_cred = state->owner->so_cred,
3631 };
1da177e4
LT		 3632 struct nfs4_lock_state *lsp;
3633 int status;
3634
911d1aaf 3635 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3636 status = nfs4_set_lock_state(state, request);
3637 if (status != 0)
3638 goto out;
3639 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3640 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3641 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3642 switch (status) {
3643 case 0:
3644 request->fl_type = F_UNLCK;
3645 break;
3646 case -NFS4ERR_DENIED:
3647 status = 0;
1da177e4 3648 }
70cc6487 3649 request->fl_ops->fl_release_private(request);
8d0a8a9d 3650out:
1da177e4
LT		 3651 return status;
3652}
3653
3654static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3655{
3656 struct nfs4_exception exception = { };
3657 int err;
3658
3659 do {
3660 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3661 _nfs4_proc_getlk(state, cmd, request),
3662 &exception);
3663 } while (exception.retry);
3664 return err;
3665}
3666
3667static int do_vfs_lock(struct file *file, struct file_lock *fl)
3668{
3669 int res = 0;
3670 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3671 case FL_POSIX:
3672 res = posix_lock_file_wait(file, fl);
3673 break;
3674 case FL_FLOCK:
3675 res = flock_lock_file_wait(file, fl);
3676 break;
3677 default:
3678 BUG();
3679 }
1da177e4
LT		 3680 return res;
3681}
3682
faf5f49c 3683struct nfs4_unlockdata {
911d1aaf
TM		 3684 struct nfs_locku_args arg;
3685 struct nfs_locku_res res;
faf5f49c
TM		 3686 struct nfs4_lock_state *lsp;
3687 struct nfs_open_context *ctx;
911d1aaf
TM		 3688 struct file_lock fl;
3689 const struct nfs_server *server;
26e976a8 3690 unsigned long timestamp;
faf5f49c
TM		 3691};
3692
911d1aaf
TM		 3693static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3694 struct nfs_open_context *ctx,
3695 struct nfs4_lock_state *lsp,
3696 struct nfs_seqid *seqid)
3697{
3698 struct nfs4_unlockdata *p;
3699 struct inode *inode = lsp->ls_state->inode;
3700
a893693c 3701 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3702 if (p == NULL)
3703 return NULL;
3704 p->arg.fh = NFS_FH(inode);
3705 p->arg.fl = &p->fl;
3706 p->arg.seqid = seqid;
c1d51931 3707 p->res.seqid = seqid;
5f7dbd5c 3708 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3709 p->arg.stateid = &lsp->ls_stateid;
3710 p->lsp = lsp;
3711 atomic_inc(&lsp->ls_count);
3712 /* Ensure we don't close file until we're done freeing locks! */
3713 p->ctx = get_nfs_open_context(ctx);
3714 memcpy(&p->fl, fl, sizeof(p->fl));
3715 p->server = NFS_SERVER(inode);
3716 return p;
3717}
3718
06f814a3 3719static void nfs4_locku_release_calldata(void *data)
faf5f49c 3720{
963d8fe5 3721 struct nfs4_unlockdata *calldata = data;
911d1aaf 3722 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3723 nfs4_put_lock_state(calldata->lsp);
3724 put_nfs_open_context(calldata->ctx);
3725 kfree(calldata);
faf5f49c
TM		 3726}
3727
963d8fe5 3728static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3729{
963d8fe5 3730 struct nfs4_unlockdata *calldata = data;
faf5f49c 3731
a893693c
AA		 3732 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3733 task->tk_status);
06f814a3
TM		 3734 if (RPC_ASSASSINATED(task))
3735 return;
faf5f49c
TM		 3736 switch (task->tk_status) {
3737 case 0:
3738 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3739 calldata->res.stateid.data,
faf5f49c 3740 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3741 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3742 break;
9e33bed5
TM		 3743 case -NFS4ERR_BAD_STATEID:
3744 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3745 case -NFS4ERR_STALE_STATEID:
3746 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3747 break;
3748 default:
9e33bed5 3749 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3750 nfs4_restart_rpc(task,
3751 calldata->server->nfs_client);
faf5f49c 3752 }
a893693c
AA		 3753 nfs4_sequence_free_slot(calldata->server->nfs_client,
3754 &calldata->res.seq_res);
faf5f49c
TM		 3755}
3756
4ce70ada 3757static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3758{
4ce70ada 3759 struct nfs4_unlockdata *calldata = data;
faf5f49c 3760
911d1aaf 3761 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3762 return;
3763 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3764 /* Note: exit _without_ running nfs4_locku_done */
3765 task->tk_action = NULL;
faf5f49c
TM		 3766 return;
3767 }
26e976a8 3768 calldata->timestamp = jiffies;
a893693c
AA		 3769 if (nfs4_setup_sequence(calldata->server->nfs_client,
3770 &calldata->arg.seq_args,
3771 &calldata->res.seq_res, 1, task))
3772 return;
5138fde0 3773 rpc_call_start(task);
faf5f49c
TM		 3774}
3775
963d8fe5 3776static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3777 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3778 .rpc_call_done = nfs4_locku_done,
06f814a3 3779 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3780};
3781
a5d16a4d
TM		 3782static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3783 struct nfs_open_context *ctx,
3784 struct nfs4_lock_state *lsp,
3785 struct nfs_seqid *seqid)
3786{
3787 struct nfs4_unlockdata *data;
5138fde0
TM		 3788 struct rpc_message msg = {
3789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3790 .rpc_cred = ctx->cred,
3791 };
c970aa85
TM		 3792 struct rpc_task_setup task_setup_data = {
3793 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3794 .rpc_message = &msg,
c970aa85 3795 .callback_ops = &nfs4_locku_ops,
101070ca 3796 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3797 .flags = RPC_TASK_ASYNC,
3798 };
a5d16a4d 3799
137d6aca
FF		 3800 /* Ensure this is an unlock - when canceling a lock, the
3801 * canceled lock is passed in, and it won't be an unlock.
3802 */
3803 fl->fl_type = F_UNLCK;
3804
a5d16a4d
TM		 3805 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3806 if (data == NULL) {
3807 nfs_free_seqid(seqid);
3808 return ERR_PTR(-ENOMEM);
3809 }
3810
5138fde0
TM		 3811 msg.rpc_argp = &data->arg,
3812 msg.rpc_resp = &data->res,
c970aa85
TM		 3813 task_setup_data.callback_data = data;
3814 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3815}
3816
faf5f49c
TM		 3817static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3818{
19e03c57 3819 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3820 struct nfs_seqid *seqid;
1da177e4 3821 struct nfs4_lock_state *lsp;
06f814a3
TM		 3822 struct rpc_task *task;
3823 int status = 0;
536ff0f8 3824 unsigned char fl_flags = request->fl_flags;
faf5f49c 3825
8d0a8a9d 3826 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3827 /* Unlock _before_ we do the RPC call */
3828 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3829 down_read(&nfsi->rwsem);
3830 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3831 up_read(&nfsi->rwsem);
9b073574 3832 goto out;
19e03c57
TM		 3833 }
3834 up_read(&nfsi->rwsem);
8d0a8a9d 3835 if (status != 0)
9b073574
TM		 3836 goto out;
3837 /* Is this a delegated lock? */
3838 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3839 goto out;
8d0a8a9d 3840 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3841 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3842 status = -ENOMEM;
911d1aaf 3843 if (seqid == NULL)
9b073574 3844 goto out;
cd3758e3 3845 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3846 status = PTR_ERR(task);
3847 if (IS_ERR(task))
9b073574 3848 goto out;
a5d16a4d 3849 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3850 rpc_put_task(task);
9b073574 3851out:
536ff0f8 3852 request->fl_flags = fl_flags;
1da177e4
LT		 3853 return status;
3854}
3855
a5d16a4d
TM		 3856struct nfs4_lockdata {
3857 struct nfs_lock_args arg;
3858 struct nfs_lock_res res;
3859 struct nfs4_lock_state *lsp;
3860 struct nfs_open_context *ctx;
3861 struct file_lock fl;
26e976a8 3862 unsigned long timestamp;
a5d16a4d
TM		 3863 int rpc_status;
3864 int cancelled;
66179efe 3865 struct nfs_server *server;
a5d16a4d
TM		 3866};
3867
3868static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3869 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3870{
a5d16a4d
TM		 3871 struct nfs4_lockdata *p;
3872 struct inode *inode = lsp->ls_state->inode;
1da177e4 3873 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3874
3875 p = kzalloc(sizeof(*p), GFP_KERNEL);
3876 if (p == NULL)
3877 return NULL;
3878
3879 p->arg.fh = NFS_FH(inode);
3880 p->arg.fl = &p->fl;
2f74c0a0
TM		 3881 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3882 if (p->arg.open_seqid == NULL)
3883 goto out_free;
a5d16a4d
TM		 3884 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3885 if (p->arg.lock_seqid == NULL)
2f74c0a0 3886 goto out_free_seqid;
a5d16a4d 3887 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3888 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3889 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3890 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3891 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3892 p->lsp = lsp;
66179efe 3893 p->server = server;
a5d16a4d
TM		 3894 atomic_inc(&lsp->ls_count);
3895 p->ctx = get_nfs_open_context(ctx);
3896 memcpy(&p->fl, fl, sizeof(p->fl));
3897 return p;
2f74c0a0
TM		 3898out_free_seqid:
3899 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3900out_free:
3901 kfree(p);
3902 return NULL;
3903}
3904
3905static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3906{
3907 struct nfs4_lockdata *data = calldata;
3908 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3909
3110ff80 3910 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3911 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3912 return;
a5d16a4d
TM		 3913 /* Do we need to do an open_to_lock_owner? */
3914 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3915 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3916 return;
a5d16a4d
TM		 3917 data->arg.open_stateid = &state->stateid;
3918 data->arg.new_lock_owner = 1;
c1d51931 3919 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3920 } else
3921 data->arg.new_lock_owner = 0;
26e976a8 3922 data->timestamp = jiffies;
66179efe
AA		 3923 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3924 &data->res.seq_res, 1, task))
3925 return;
5138fde0 3926 rpc_call_start(task);
3110ff80 3927 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3928}
3929
3930static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3931{
3932 struct nfs4_lockdata *data = calldata;
3933
3110ff80 3934 dprintk("%s: begin!\n", __func__);
a5d16a4d 3935
66179efe
AA		 3936 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3937 task->tk_status);
3938
a5d16a4d
TM		 3939 data->rpc_status = task->tk_status;
3940 if (RPC_ASSASSINATED(task))
3941 goto out;
3942 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3943 if (data->rpc_status == 0)
3944 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3945 else
3946 goto out;
3947 }
3948 if (data->rpc_status == 0) {
3949 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3950 sizeof(data->lsp->ls_stateid.data));
3951 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3952 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3953 }
a5d16a4d 3954out:
3110ff80 3955 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3956}
3957
3958static void nfs4_lock_release(void *calldata)
3959{
3960 struct nfs4_lockdata *data = calldata;
3961
3110ff80 3962 dprintk("%s: begin!\n", __func__);
2f74c0a0 3963 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3964 if (data->cancelled != 0) {
3965 struct rpc_task *task;
3966 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3967 data->arg.lock_seqid);
3968 if (!IS_ERR(task))
e6b3c4db 3969 rpc_put_task(task);
3110ff80 3970 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3971 } else
3972 nfs_free_seqid(data->arg.lock_seqid);
3973 nfs4_put_lock_state(data->lsp);
3974 put_nfs_open_context(data->ctx);
3975 kfree(data);
3110ff80 3976 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3977}
3978
3979static const struct rpc_call_ops nfs4_lock_ops = {
3980 .rpc_call_prepare = nfs4_lock_prepare,
3981 .rpc_call_done = nfs4_lock_done,
3982 .rpc_release = nfs4_lock_release,
3983};
3984
3985static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3986{
3987 struct nfs4_lockdata *data;
3988 struct rpc_task *task;
5138fde0
TM		 3989 struct rpc_message msg = {
3990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3991 .rpc_cred = state->owner->so_cred,
3992 };
c970aa85
TM		 3993 struct rpc_task_setup task_setup_data = {
3994 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3995 .rpc_message = &msg,
c970aa85 3996 .callback_ops = &nfs4_lock_ops,
101070ca 3997 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3998 .flags = RPC_TASK_ASYNC,
3999 };
a5d16a4d
TM		 4000 int ret;
4001
3110ff80 4002 dprintk("%s: begin!\n", __func__);
cd3758e3 4003 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4004 fl->fl_u.nfs4_fl.owner);
4005 if (data == NULL)
4006 return -ENOMEM;
4007 if (IS_SETLKW(cmd))
4008 data->arg.block = 1;
4009 if (reclaim != 0)
4010 data->arg.reclaim = 1;
5138fde0
TM		 4011 msg.rpc_argp = &data->arg,
4012 msg.rpc_resp = &data->res,
c970aa85
TM		 4013 task_setup_data.callback_data = data;
4014 task = rpc_run_task(&task_setup_data);
7a1218a2 4015 if (IS_ERR(task))
a5d16a4d 4016 return PTR_ERR(task);
a5d16a4d
TM		 4017 ret = nfs4_wait_for_completion_rpc_task(task);
4018 if (ret == 0) {
4019 ret = data->rpc_status;
a5d16a4d
TM		 4020 } else
4021 data->cancelled = 1;
e6b3c4db 4022 rpc_put_task(task);
3110ff80 4023 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4024 return ret;
1da177e4
LT		 4025}
4026
4027static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4028{
202b50dc
TM		 4029 struct nfs_server *server = NFS_SERVER(state->inode);
4030 struct nfs4_exception exception = { };
4031 int err;
4032
4033 do {
42a2d13e
TM		 4034 /* Cache the lock if possible... */
4035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4036 return 0;
202b50dc
TM		 4037 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4038 if (err != -NFS4ERR_DELAY)
4039 break;
4040 nfs4_handle_exception(server, err, &exception);
4041 } while (exception.retry);
4042 return err;
1da177e4
LT		 4043}
4044
4045static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4046{
202b50dc
TM		 4047 struct nfs_server *server = NFS_SERVER(state->inode);
4048 struct nfs4_exception exception = { };
4049 int err;
4050
6bfc93ef
TM		 4051 err = nfs4_set_lock_state(state, request);
4052 if (err != 0)
4053 return err;
202b50dc 4054 do {
42a2d13e
TM		 4055 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4056 return 0;
202b50dc 4057 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
a9ed2e25
TM		 4058 switch (err) {
4059 default:
4060 goto out;
4061 case -NFS4ERR_GRACE:
4062 case -NFS4ERR_DELAY:
4063 nfs4_handle_exception(server, err, &exception);
4064 err = 0;
4065 }
202b50dc 4066 } while (exception.retry);
a9ed2e25 4067out:
202b50dc 4068 return err;
1da177e4
LT		 4069}
4070
4071static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4072{
19e03c57 4073 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4074 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4075 int status;
4076
6bfc93ef 4077 /* Is this a delegated open? */
6bfc93ef
TM		 4078 status = nfs4_set_lock_state(state, request);
4079 if (status != 0)
4080 goto out;
01c3b861
TM		 4081 request->fl_flags |= FL_ACCESS;
4082 status = do_vfs_lock(request->fl_file, request);
4083 if (status < 0)
4084 goto out;
19e03c57 4085 down_read(&nfsi->rwsem);
01c3b861 4086 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4087 /* Yes: cache locks! */
01c3b861 4088 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4089 request->fl_flags = fl_flags & ~FL_SLEEP;
4090 status = do_vfs_lock(request->fl_file, request);
4091 goto out_unlock;
01c3b861 4092 }
6bfc93ef
TM		 4093 status = _nfs4_do_setlk(state, cmd, request, 0);
4094 if (status != 0)
01c3b861 4095 goto out_unlock;
6bfc93ef 4096 /* Note: we always want to sleep here! */
01c3b861 4097 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4098 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4099 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4100out_unlock:
19e03c57 4101 up_read(&nfsi->rwsem);
01c3b861
TM		 4102out:
4103 request->fl_flags = fl_flags;
1da177e4
LT		 4104 return status;
4105}
4106
4107static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4108{
4109 struct nfs4_exception exception = { };
4110 int err;
4111
4112 do {
965b5d67
TM		 4113 err = _nfs4_proc_setlk(state, cmd, request);
4114 if (err == -NFS4ERR_DENIED)
4115 err = -EAGAIN;
1da177e4 4116 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4117 err, &exception);
1da177e4
LT		 4118 } while (exception.retry);
4119 return err;
4120}
4121
4122static int
4123nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4124{
4125 struct nfs_open_context *ctx;
4126 struct nfs4_state *state;
4127 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4128 int status;
4129
4130 /* verify open state */
cd3758e3 4131 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4132 state = ctx->state;
4133
4134 if (request->fl_start < 0 || request->fl_end < 0)
4135 return -EINVAL;
4136
d953126a
TM		 4137 if (IS_GETLK(cmd)) {
4138 if (state != NULL)
4139 return nfs4_proc_getlk(state, F_GETLK, request);
4140 return 0;
4141 }
1da177e4
LT		 4142
4143 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4144 return -EINVAL;
4145
d953126a
TM		 4146 if (request->fl_type == F_UNLCK) {
4147 if (state != NULL)
4148 return nfs4_proc_unlck(state, cmd, request);
4149 return 0;
4150 }
1da177e4 4151
d953126a
TM		 4152 if (state == NULL)
4153 return -ENOLCK;
1da177e4
LT		 4154 do {
4155 status = nfs4_proc_setlk(state, cmd, request);
4156 if ((status != -EAGAIN) || IS_SETLK(cmd))
4157 break;
4158 timeout = nfs4_set_lock_task_retry(timeout);
4159 status = -ERESTARTSYS;
4160 if (signalled())
4161 break;
4162 } while(status < 0);
1da177e4
LT		 4163 return status;
4164}
4165
888e694c
TM		 4166int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4167{
4168 struct nfs_server *server = NFS_SERVER(state->inode);
4169 struct nfs4_exception exception = { };
4170 int err;
4171
4172 err = nfs4_set_lock_state(state, fl);
4173 if (err != 0)
4174 goto out;
4175 do {
4176 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4177 switch (err) {
4178 default:
4179 printk(KERN_ERR "%s: unhandled error %d.\n",
4180 __func__, err);
4181 case 0:
965b5d67 4182 case -ESTALE:
d5122201
TM		 4183 goto out;
4184 case -NFS4ERR_EXPIRED:
4185 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4186 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4187 nfs4_schedule_state_recovery(server->nfs_client);
4188 goto out;
965b5d67
TM		 4189 case -ERESTARTSYS:
4190 /*
4191 * The show must go on: exit, but mark the
4192 * stateid as needing recovery.
4193 */
4194 case -NFS4ERR_ADMIN_REVOKED:
4195 case -NFS4ERR_BAD_STATEID:
4196 case -NFS4ERR_OPENMODE:
4197 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4198 err = 0;
4199 goto out;
4200 case -ENOMEM:
4201 case -NFS4ERR_DENIED:
4202 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4203 err = 0;
4204 goto out;
d5122201
TM		 4205 case -NFS4ERR_DELAY:
4206 break;
4207 }
888e694c
TM		 4208 err = nfs4_handle_exception(server, err, &exception);
4209 } while (exception.retry);
4210out:
4211 return err;
4212}
6b3b5496 4213
aa1870af
BF		 4214#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4215
6b3b5496
BF		 4216int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4217 size_t buflen, int flags)
4218{
4b580ee3
BF		 4219 struct inode *inode = dentry->d_inode;
4220
4221 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4222 return -EOPNOTSUPP;
4223
4b580ee3 4224 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4225}
4226
4227/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4228 * and that's what we'll do for e.g. user attributes that haven't been set.
4229 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4230 * attributes in kernel-managed attribute namespaces. */
4231ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4232 size_t buflen)
4233{
aa1870af
BF		 4234 struct inode *inode = dentry->d_inode;
4235
4236 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4237 return -EOPNOTSUPP;
4238
4239 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4240}
4241
4242ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4243{
aa1870af 4244 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4245
096455a2
BF		 4246 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4247 return 0;
6b3b5496
BF		 4248 if (buf && buflen < len)
4249 return -ERANGE;
4250 if (buf)
aa1870af
BF		 4251 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4252 return len;
6b3b5496
BF		 4253}
4254
69aaaae1
TM		 4255static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4256{
4257 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4258 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4259 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4260 return;
4261
4262 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4263 NFS_ATTR_FATTR_NLINK;
4264 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4265 fattr->nlink = 2;
4266}
4267
56659e99 4268int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4269 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4270{
4271 struct nfs_server *server = NFS_SERVER(dir);
4272 u32 bitmask[2] = {
361e624f
MN		 4273 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4274 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4275 };
4276 struct nfs4_fs_locations_arg args = {
4277 .dir_fh = NFS_FH(dir),
c228fd3a 4278 .name = name,
683b57b4
TM		 4279 .page = page,
4280 .bitmask = bitmask,
4281 };
22958463
BH		 4282 struct nfs4_fs_locations_res res = {
4283 .fs_locations = fs_locations,
4284 };
683b57b4
TM		 4285 struct rpc_message msg = {
4286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4287 .rpc_argp = &args,
22958463 4288 .rpc_resp = &res,
683b57b4
TM		 4289 };
4290 int status;
4291
3110ff80 4292 dprintk("%s: start\n", __func__);
c228fd3a 4293 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4294 fs_locations->server = server;
830b8e33 4295 fs_locations->nlocations = 0;
cccef3b9 4296 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4297 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4298 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4299 return status;
4300}
4301
557134a3 4302#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4303/*
4304 * nfs4_proc_exchange_id()
4305 *
4306 * Since the clientid has expired, all compounds using sessions
4307 * associated with the stale clientid will be returning
4308 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4309 * be in some phase of session reset.
4310 */
4311static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4312{
4313 nfs4_verifier verifier;
4314 struct nfs41_exchange_id_args args = {
4315 .client = clp,
4316 .flags = clp->cl_exchange_flags,
4317 };
4318 struct nfs41_exchange_id_res res = {
4319 .client = clp,
4320 };
4321 int status;
4322 struct rpc_message msg = {
4323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4324 .rpc_argp = &args,
4325 .rpc_resp = &res,
4326 .rpc_cred = cred,
4327 };
4328 __be32 *p;
4329
4330 dprintk("--> %s\n", __func__);
4331 BUG_ON(clp == NULL);
a7b72103 4332
99fe60d0
BH		 4333 p = (u32 *)verifier.data;
4334 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4335 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4336 args.verifier = &verifier;
4337
4338 while (1) {
4339 args.id_len = scnprintf(args.id, sizeof(args.id),
4340 "%s/%s %u",
4341 clp->cl_ipaddr,
4342 rpc_peeraddr2str(clp->cl_rpcclient,
4343 RPC_DISPLAY_ADDR),
4344 clp->cl_id_uniquifier);
4345
4346 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4347
4348 if (status != NFS4ERR_CLID_INUSE)
4349 break;
4350
4351 if (signalled())
4352 break;
4353
4354 if (++clp->cl_id_uniquifier == 0)
4355 break;
4356 }
4357
4358 dprintk("<-- %s status= %d\n", __func__, status);
4359 return status;
4360}
4361
2050f0cc
AA		 4362struct nfs4_get_lease_time_data {
4363 struct nfs4_get_lease_time_args *args;
4364 struct nfs4_get_lease_time_res *res;
4365 struct nfs_client *clp;
4366};
4367
4368static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4369 void *calldata)
4370{
4371 int ret;
4372 struct nfs4_get_lease_time_data *data =
4373 (struct nfs4_get_lease_time_data *)calldata;
4374
4375 dprintk("--> %s\n", __func__);
4376 /* just setup sequence, do not trigger session recovery
4377 since we're invoked within one */
4378 ret = nfs41_setup_sequence(data->clp->cl_session,
4379 &data->args->la_seq_args,
4380 &data->res->lr_seq_res, 0, task);
4381
4382 BUG_ON(ret == -EAGAIN);
4383 rpc_call_start(task);
4384 dprintk("<-- %s\n", __func__);
4385}
4386
4387/*
4388 * Called from nfs4_state_manager thread for session setup, so don't recover
4389 * from sequence operation or clientid errors.
4390 */
4391static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4392{
4393 struct nfs4_get_lease_time_data *data =
4394 (struct nfs4_get_lease_time_data *)calldata;
4395
4396 dprintk("--> %s\n", __func__);
4397 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4398 switch (task->tk_status) {
4399 case -NFS4ERR_DELAY:
4400 case -NFS4ERR_GRACE:
4401 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4402 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4403 task->tk_status = 0;
eedc020e 4404 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4405 return;
4406 }
4407 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4408 dprintk("<-- %s\n", __func__);
4409}
4410
4411struct rpc_call_ops nfs4_get_lease_time_ops = {
4412 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4413 .rpc_call_done = nfs4_get_lease_time_done,
4414};
4415
4416int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4417{
4418 struct rpc_task *task;
4419 struct nfs4_get_lease_time_args args;
4420 struct nfs4_get_lease_time_res res = {
4421 .lr_fsinfo = fsinfo,
4422 };
4423 struct nfs4_get_lease_time_data data = {
4424 .args = &args,
4425 .res = &res,
4426 .clp = clp,
4427 };
4428 struct rpc_message msg = {
4429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4430 .rpc_argp = &args,
4431 .rpc_resp = &res,
4432 };
4433 struct rpc_task_setup task_setup = {
4434 .rpc_client = clp->cl_rpcclient,
4435 .rpc_message = &msg,
4436 .callback_ops = &nfs4_get_lease_time_ops,
4437 .callback_data = &data
4438 };
4439 int status;
4440
4441 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4442 dprintk("--> %s\n", __func__);
4443 task = rpc_run_task(&task_setup);
4444
4445 if (IS_ERR(task))
4446 status = PTR_ERR(task);
4447 else {
4448 status = task->tk_status;
4449 rpc_put_task(task);
4450 }
4451 dprintk("<-- %s return %d\n", __func__, status);
4452
4453 return status;
4454}
4455
b73dafa7
RL		 4456/*
4457 * Reset a slot table
4458 */
4459static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4460 int old_max_slots, int ivalue)
ac72b7b3 4461{
b73dafa7 4462 int i;
ac72b7b3
AA		 4463 int ret = 0;
4464
b73dafa7 4465 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4466
b73dafa7
RL		 4467 /*
4468 * Until we have dynamic slot table adjustment, insist
4469 * upon the same slot table size
4470 */
ac72b7b3
AA		 4471 if (max_slots != old_max_slots) {
4472 dprintk("%s reset slot table does't match old\n",
4473 __func__);
4474 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4475 goto out;
4476 }
4477 spin_lock(&tbl->slot_tbl_lock);
4478 for (i = 0; i < max_slots; ++i)
b73dafa7 4479 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4480 tbl->highest_used_slotid = -1;
4481 spin_unlock(&tbl->slot_tbl_lock);
4482 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4483 tbl, tbl->slots, tbl->max_slots);
4484out:
4485 dprintk("<-- %s: return %d\n", __func__, ret);
4486 return ret;
4487}
4488
b73dafa7
RL		 4489/*
4490 * Reset the forechannel and backchannel slot tables
4491 */
4492static int nfs4_reset_slot_tables(struct nfs4_session *session)
4493{
4494 int status;
4495
4496 status = nfs4_reset_slot_table(&session->fc_slot_table,
4497 session->fc_attrs.max_reqs,
4498 session->fc_slot_table.max_slots,
4499 1);
f8625a6a
RL		 4500 if (status)
4501 return status;
4502
4503 status = nfs4_reset_slot_table(&session->bc_slot_table,
4504 session->bc_attrs.max_reqs,
4505 session->bc_slot_table.max_slots,
4506 0);
b73dafa7
RL		 4507 return status;
4508}
4509
f8625a6a
RL		 4510/* Destroy the slot table */
4511static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4512{
4513 if (session->fc_slot_table.slots != NULL) {
4514 kfree(session->fc_slot_table.slots);
4515 session->fc_slot_table.slots = NULL;
4516 }
4517 if (session->bc_slot_table.slots != NULL) {
4518 kfree(session->bc_slot_table.slots);
4519 session->bc_slot_table.slots = NULL;
4520 }
4521 return;
4522}
4523
fc931582
AA		 4524/*
4525 * Initialize slot table
4526 */
050047ce
RL		 4527static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4528 int max_slots, int ivalue)
fc931582 4529{
050047ce 4530 int i;
fc931582
AA		 4531 struct nfs4_slot *slot;
4532 int ret = -ENOMEM;
4533
4534 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4535
050047ce 4536 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4537
4538 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4539 if (!slot)
4540 goto out;
4541 for (i = 0; i < max_slots; ++i)
050047ce 4542 slot[i].seq_nr = ivalue;
fc931582
AA		 4543 ret = 0;
4544
4545 spin_lock(&tbl->slot_tbl_lock);
4546 if (tbl->slots != NULL) {
4547 spin_unlock(&tbl->slot_tbl_lock);
4548 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4549 __func__, tbl, tbl->slots);
4550 WARN_ON(1);
4551 goto out_free;
4552 }
4553 tbl->max_slots = max_slots;
4554 tbl->slots = slot;
4555 tbl->highest_used_slotid = -1; /* no slot is currently used */
4556 spin_unlock(&tbl->slot_tbl_lock);
4557 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4558 tbl, tbl->slots, tbl->max_slots);
4559out:
4560 dprintk("<-- %s: return %d\n", __func__, ret);
4561 return ret;
050047ce 4562
fc931582
AA		 4563out_free:
4564 kfree(slot);
4565 goto out;
4566}
4567
050047ce
RL		 4568/*
4569 * Initialize the forechannel and backchannel tables
4570 */
4571static int nfs4_init_slot_tables(struct nfs4_session *session)
4572{
4573 int status;
4574
4575 status = nfs4_init_slot_table(&session->fc_slot_table,
4576 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4577 if (status)
4578 return status;
050047ce 4579
f8625a6a
RL		 4580 status = nfs4_init_slot_table(&session->bc_slot_table,
4581 session->bc_attrs.max_reqs, 0);
4582 if (status)
4583 nfs4_destroy_slot_tables(session);
4584
4585 return status;
557134a3
AA		 4586}
4587
4588struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4589{
4590 struct nfs4_session *session;
4591 struct nfs4_slot_table *tbl;
4592
4593 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4594 if (!session)
4595 return NULL;
76db6d95
AA		 4596
4597 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4598 /*
4599 * The create session reply races with the server back
4600 * channel probe. Mark the client NFS_CS_SESSION_INITING
4601 * so that the client back channel can find the
4602 * nfs_client struct
4603 */
4604 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4605
557134a3
AA		 4606 tbl = &session->fc_slot_table;
4607 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4608 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4609
4610 tbl = &session->bc_slot_table;
4611 spin_lock_init(&tbl->slot_tbl_lock);
4612 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4613
557134a3
AA		 4614 session->clp = clp;
4615 return session;
4616}
4617
4618void nfs4_destroy_session(struct nfs4_session *session)
4619{
5a0ffe54
AA		 4620 nfs4_proc_destroy_session(session);
4621 dprintk("%s Destroy backchannel for xprt %p\n",
4622 __func__, session->clp->cl_rpcclient->cl_xprt);
4623 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4624 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4625 nfs4_destroy_slot_tables(session);
557134a3
AA		 4626 kfree(session);
4627}
4628
fc931582
AA		 4629/*
4630 * Initialize the values to be used by the client in CREATE_SESSION
4631 * If nfs4_init_session set the fore channel request and response sizes,
4632 * use them.
4633 *
4634 * Set the back channel max_resp_sz_cached to zero to force the client to
4635 * always set csa_cachethis to FALSE because the current implementation
4636 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4637 */
4638static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4639{
4640 struct nfs4_session *session = args->client->cl_session;
4641 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4642 mxresp_sz = session->fc_attrs.max_resp_sz;
4643
4644 if (mxrqst_sz == 0)
4645 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4646 if (mxresp_sz == 0)
4647 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4648 /* Fore channel attributes */
4649 args->fc_attrs.headerpadsz = 0;
4650 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4651 args->fc_attrs.max_resp_sz = mxresp_sz;
4652 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4653 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4654 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4655
4656 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4657 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4658 __func__,
4659 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4660 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4661 args->fc_attrs.max_reqs);
4662
4663 /* Back channel attributes */
4664 args->bc_attrs.headerpadsz = 0;
4665 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4666 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4667 args->bc_attrs.max_resp_sz_cached = 0;
4668 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4669 args->bc_attrs.max_reqs = 1;
4670
4671 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4672 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4673 __func__,
4674 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4675 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4676 args->bc_attrs.max_reqs);
4677}
4678
8d35301d
AA		 4679static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4680{
4681 if (rcvd <= sent)
4682 return 0;
4683 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4684 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4685 return -EINVAL;
4686}
4687
4688#define _verify_fore_channel_attr(_name_) \
4689 _verify_channel_attr("fore", #_name_, \
4690 args->fc_attrs._name_, \
4691 session->fc_attrs._name_)
4692
4693#define _verify_back_channel_attr(_name_) \
4694 _verify_channel_attr("back", #_name_, \
4695 args->bc_attrs._name_, \
4696 session->bc_attrs._name_)
4697
4698/*
4699 * The server is not allowed to increase the fore channel header pad size,
4700 * maximum response size, or maximum number of operations.
4701 *
4702 * The back channel attributes are only negotiatied down: We send what the
4703 * (back channel) server insists upon.
4704 */
4705static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4706 struct nfs4_session *session)
4707{
4708 int ret = 0;
4709
4710 ret |= _verify_fore_channel_attr(headerpadsz);
4711 ret |= _verify_fore_channel_attr(max_resp_sz);
4712 ret |= _verify_fore_channel_attr(max_ops);
4713
4714 ret |= _verify_back_channel_attr(headerpadsz);
4715 ret |= _verify_back_channel_attr(max_rqst_sz);
4716 ret |= _verify_back_channel_attr(max_resp_sz);
4717 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4718 ret |= _verify_back_channel_attr(max_ops);
4719 ret |= _verify_back_channel_attr(max_reqs);
4720
4721 return ret;
4722}
4723
fc931582
AA		 4724static int _nfs4_proc_create_session(struct nfs_client *clp)
4725{
4726 struct nfs4_session *session = clp->cl_session;
4727 struct nfs41_create_session_args args = {
4728 .client = clp,
4729 .cb_program = NFS4_CALLBACK,
4730 };
4731 struct nfs41_create_session_res res = {
4732 .client = clp,
4733 };
4734 struct rpc_message msg = {
4735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4736 .rpc_argp = &args,
4737 .rpc_resp = &res,
4738 };
4739 int status;
4740
4741 nfs4_init_channel_attrs(&args);
0f91421e 4742 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4743
4744 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4745
8d35301d
AA		 4746 if (!status)
4747 /* Verify the session's negotiated channel_attrs values */
4748 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4749 if (!status) {
4750 /* Increment the clientid slot sequence id */
4751 clp->cl_seqid++;
4752 }
4753
4754 return status;
4755}
4756
4757/*
4758 * Issues a CREATE_SESSION operation to the server.
4759 * It is the responsibility of the caller to verify the session is
4760 * expired before calling this routine.
4761 */
ac72b7b3 4762int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4763{
4764 int status;
4765 unsigned *ptr;
4766 struct nfs_fsinfo fsinfo;
4767 struct nfs4_session *session = clp->cl_session;
4768
4769 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4770
4771 status = _nfs4_proc_create_session(clp);
4772 if (status)
4773 goto out;
4774
ac72b7b3
AA		 4775 /* Init or reset the fore channel */
4776 if (reset)
b73dafa7 4777 status = nfs4_reset_slot_tables(session);
ac72b7b3 4778 else
050047ce 4779 status = nfs4_init_slot_tables(session);
fc931582
AA		 4780 dprintk("fore channel slot table initialization returned %d\n", status);
4781 if (status)
4782 goto out;
4783
4784 ptr = (unsigned *)&session->sess_id.data[0];
4785 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4786 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4787
ac72b7b3
AA		 4788 if (reset)
4789 /* Lease time is aleady set */
4790 goto out;
4791
fc931582
AA		 4792 /* Get the lease time */
4793 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4794 if (status == 0) {
4795 /* Update lease time and schedule renewal */
4796 spin_lock(&clp->cl_lock);
4797 clp->cl_lease_time = fsinfo.lease_time * HZ;
4798 clp->cl_last_renewal = jiffies;
4799 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4800 spin_unlock(&clp->cl_lock);
4801
4802 nfs4_schedule_state_renewal(clp);
4803 }
4804out:
4805 dprintk("<-- %s\n", __func__);
4806 return status;
4807}
4808
0f3e66c6
AA		 4809/*
4810 * Issue the over-the-wire RPC DESTROY_SESSION.
4811 * The caller must serialize access to this routine.
4812 */
4813int nfs4_proc_destroy_session(struct nfs4_session *session)
4814{
4815 int status = 0;
4816 struct rpc_message msg;
4817
4818 dprintk("--> nfs4_proc_destroy_session\n");
4819
4820 /* session is still being setup */
4821 if (session->clp->cl_cons_state != NFS_CS_READY)
4822 return status;
4823
4824 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4825 msg.rpc_argp = session;
4826 msg.rpc_resp = NULL;
4827 msg.rpc_cred = NULL;
4828 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4829
4830 if (status)
4831 printk(KERN_WARNING
4832 "Got error %d from the server on DESTROY_SESSION. "
4833 "Session has been destroyed regardless...\n", status);
4834
4835 dprintk("<-- nfs4_proc_destroy_session\n");
4836 return status;
4837}
4838
fccba804
TM		 4839int nfs4_init_session(struct nfs_server *server)
4840{
4841 struct nfs_client *clp = server->nfs_client;
4842 int ret;
4843
4844 if (!nfs4_has_session(clp))
4845 return 0;
4846
4847 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4848 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4849 ret = nfs4_recover_expired_lease(server);
4850 if (!ret)
4851 ret = nfs4_check_client_ready(clp);
4852 return ret;
4853}
4854
fc01cea9
AA		 4855/*
4856 * Renew the cl_session lease.
4857 */
4858static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4859{
4860 struct nfs4_sequence_args args;
4861 struct nfs4_sequence_res res;
4862
4863 struct rpc_message msg = {
4864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4865 .rpc_argp = &args,
4866 .rpc_resp = &res,
4867 .rpc_cred = cred,
4868 };
4869
4870 args.sa_cache_this = 0;
4871
4872 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4873 &res, 0);
4874}
4875
4876void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4877{
4878 struct nfs_client *clp = (struct nfs_client *)data;
4879
4880 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4881
4882 if (task->tk_status < 0) {
4883 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4884
4885 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4886 == -EAGAIN) {
eedc020e 4887 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4888 return;
4889 }
4890 }
4891 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4892 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4893
fc01cea9
AA		 4894 kfree(task->tk_msg.rpc_argp);
4895 kfree(task->tk_msg.rpc_resp);
4896
4897 dprintk("<-- %s\n", __func__);
4898}
4899
4900static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4901{
4902 struct nfs_client *clp;
4903 struct nfs4_sequence_args *args;
4904 struct nfs4_sequence_res *res;
4905
4906 clp = (struct nfs_client *)data;
4907 args = task->tk_msg.rpc_argp;
4908 res = task->tk_msg.rpc_resp;
4909
4910 if (nfs4_setup_sequence(clp, args, res, 0, task))
4911 return;
4912 rpc_call_start(task);
4913}
4914
4915static const struct rpc_call_ops nfs41_sequence_ops = {
4916 .rpc_call_done = nfs41_sequence_call_done,
4917 .rpc_call_prepare = nfs41_sequence_prepare,
4918};
4919
4920static int nfs41_proc_async_sequence(struct nfs_client *clp,
4921 struct rpc_cred *cred)
4922{
4923 struct nfs4_sequence_args *args;
4924 struct nfs4_sequence_res *res;
4925 struct rpc_message msg = {
4926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4927 .rpc_cred = cred,
4928 };
4929
4930 args = kzalloc(sizeof(*args), GFP_KERNEL);
4931 if (!args)
4932 return -ENOMEM;
4933 res = kzalloc(sizeof(*res), GFP_KERNEL);
4934 if (!res) {
4935 kfree(args);
4936 return -ENOMEM;
4937 }
4938 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4939 msg.rpc_argp = args;
4940 msg.rpc_resp = res;
4941
4942 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4943 &nfs41_sequence_ops, (void *)clp);
4944}
4945
557134a3
AA		 4946#endif /* CONFIG_NFS_V4_1 */
4947
591d71cb 4948struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4949 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4950 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4951 .recover_open = nfs4_open_reclaim,
4952 .recover_lock = nfs4_lock_reclaim,
591d71cb 4953 .establish_clid = nfs4_init_clientid,
90a16617 4954 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4955};
4956
591d71cb
AA		 4957#if defined(CONFIG_NFS_V4_1)
4958struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4959 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4960 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4961 .recover_open = nfs4_open_reclaim,
4962 .recover_lock = nfs4_lock_reclaim,
4963 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4964 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4965};
4966#endif /* CONFIG_NFS_V4_1 */
4967
4968struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4969 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4970 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4971 .recover_open = nfs4_open_expired,
4972 .recover_lock = nfs4_lock_expired,
4973 .establish_clid = nfs4_init_clientid,
90a16617 4974 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4975};
4976
4977#if defined(CONFIG_NFS_V4_1)
4978struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4979 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4980 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4981 .recover_open = nfs4_open_expired,
4982 .recover_lock = nfs4_lock_expired,
591d71cb 4983 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4984 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4985};
591d71cb 4986#endif /* CONFIG_NFS_V4_1 */
1da177e4 4987
29fba38b
BH		 4988struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4989 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4990 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4991 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4992};
4993
4994#if defined(CONFIG_NFS_V4_1)
4995struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4996 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4997 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4998 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4999};
5000#endif
5001
5002/*
5003 * Per minor version reboot and network partition recovery ops
5004 */
5005
591d71cb
AA		 5006struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5007 &nfs40_reboot_recovery_ops,
5008#if defined(CONFIG_NFS_V4_1)
5009 &nfs41_reboot_recovery_ops,
5010#endif
5011};
5012
5013struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5014 &nfs40_nograce_recovery_ops,
5015#if defined(CONFIG_NFS_V4_1)
5016 &nfs41_nograce_recovery_ops,
5017#endif
5018};
5019
29fba38b
BH		 5020struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5021 &nfs40_state_renewal_ops,
5022#if defined(CONFIG_NFS_V4_1)
5023 &nfs41_state_renewal_ops,
5024#endif
5025};
5026
92e1d5be 5027static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5028 .permission = nfs_permission,
5029 .getattr = nfs_getattr,
5030 .setattr = nfs_setattr,
5031 .getxattr = nfs4_getxattr,
5032 .setxattr = nfs4_setxattr,
5033 .listxattr = nfs4_listxattr,
5034};
5035
509de811 5036const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5037 .version = 4, /* protocol version */
5038 .dentry_ops = &nfs4_dentry_operations,
5039 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5040 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5041 .getroot = nfs4_proc_get_root,
5042 .getattr = nfs4_proc_getattr,
5043 .setattr = nfs4_proc_setattr,
2b3de441 5044 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5045 .lookup = nfs4_proc_lookup,
5046 .access = nfs4_proc_access,
5047 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5048 .create = nfs4_proc_create,
5049 .remove = nfs4_proc_remove,
5050 .unlink_setup = nfs4_proc_unlink_setup,
5051 .unlink_done = nfs4_proc_unlink_done,
5052 .rename = nfs4_proc_rename,
5053 .link = nfs4_proc_link,
5054 .symlink = nfs4_proc_symlink,
5055 .mkdir = nfs4_proc_mkdir,
5056 .rmdir = nfs4_proc_remove,
5057 .readdir = nfs4_proc_readdir,
5058 .mknod = nfs4_proc_mknod,
5059 .statfs = nfs4_proc_statfs,
5060 .fsinfo = nfs4_proc_fsinfo,
5061 .pathconf = nfs4_proc_pathconf,
e9326dca 5062 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5063 .decode_dirent = nfs4_decode_dirent,
5064 .read_setup = nfs4_proc_read_setup,
ec06c096 5065 .read_done = nfs4_read_done,
1da177e4 5066 .write_setup = nfs4_proc_write_setup,
788e7a89 5067 .write_done = nfs4_write_done,
1da177e4 5068 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5069 .commit_done = nfs4_commit_done,
1da177e4 5070 .lock = nfs4_proc_lock,
e50a1c2e 5071 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5072 .close_context = nfs4_close_context,
1da177e4
LT		 5073};
5074
5075/*
5076 * Local variables:
5077 * c-basic-offset: 8
5078 * End:
5079 */
Linux 6.x block layer and io_uring tree(s)