]> bbs.cooldavid.org Git - net-next-2.6.git/blame - fs/nfs/nfs4proc.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfs41: nfs41_call_sync_done
[net-next-2.6.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>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 66static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 68
1da177e4 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT		 71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT		 75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM		 196static int nfs4_wait_clnt_recover(struct nfs_client *clp)
197{
198 int res;
199
200 might_sleep();
201
e005e804 202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 203 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 204 return res;
205}
206
207static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
208{
209 int res = 0;
210
211 might_sleep();
212
213 if (*timeout <= 0)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
219 res = -ERESTARTSYS;
220 *timeout <<= 1;
221 return res;
222}
223
224/* This is the error handling routine for processes that are allowed
225 * to sleep.
226 */
227static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
228{
229 struct nfs_client *clp = server->nfs_client;
9e33bed5 230 struct nfs4_state *state = exception->state;
65de872e
TM		 231 int ret = errorcode;
232
233 exception->retry = 0;
234 switch(errorcode) {
235 case 0:
236 return 0;
9e33bed5
TM		 237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
240 if (state == NULL)
241 break;
242 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
248 if (ret == 0)
249 exception->retry = 1;
250 break;
251 case -NFS4ERR_FILE_OPEN:
252 case -NFS4ERR_GRACE:
253 case -NFS4ERR_DELAY:
254 ret = nfs4_delay(server->client, &exception->timeout);
255 if (ret != 0)
256 break;
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
259 }
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
262}
263
264
26e976a8 265static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 266{
7539bbab 267 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
272}
273
cccef3b9
AA		 274#if defined(CONFIG_NFS_V4_1)
275
e2c4ab3c
AA		 276/*
277 * nfs4_free_slot - free a slot and efficiently update slot table.
278 *
279 * freeing a slot is trivially done by clearing its respective bit
280 * in the bitmap.
281 * If the freed slotid equals highest_used_slotid we want to update it
282 * so that the server would be able to size down the slot table if needed,
283 * otherwise we know that the highest_used_slotid is still in use.
284 * When updating highest_used_slotid there may be "holes" in the bitmap
285 * so we need to scan down from highest_used_slotid to 0 looking for the now
286 * highest slotid in use.
287 * If none found, highest_used_slotid is set to -1.
288 */
289static void
290nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
291{
292 int slotid = free_slotid;
293
294 spin_lock(&tbl->slot_tbl_lock);
295 /* clear used bit in bitmap */
296 __clear_bit(slotid, tbl->used_slots);
297
298 /* update highest_used_slotid when it is freed */
299 if (slotid == tbl->highest_used_slotid) {
300 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
301 if (slotid >= 0 && slotid < tbl->max_slots)
302 tbl->highest_used_slotid = slotid;
303 else
304 tbl->highest_used_slotid = -1;
305 }
306 rpc_wake_up_next(&tbl->slot_tbl_waitq);
307 spin_unlock(&tbl->slot_tbl_lock);
308 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
309 free_slotid, tbl->highest_used_slotid);
310}
311
13615871
AA		 312void nfs41_sequence_free_slot(const struct nfs_client *clp,
313 struct nfs4_sequence_res *res)
314{
315 struct nfs4_slot_table *tbl;
316
317 if (!nfs4_has_session(clp)) {
318 dprintk("%s: No session\n", __func__);
319 return;
320 }
321 tbl = &clp->cl_session->fc_slot_table;
322 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
323 dprintk("%s: No slot\n", __func__);
324 /* just wake up the next guy waiting since
325 * we may have not consumed a slot after all */
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 return;
328 }
329 nfs4_free_slot(tbl, res->sr_slotid);
330 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
331}
332
b0df806c
AA		 333static void nfs41_sequence_done(struct nfs_client *clp,
334 struct nfs4_sequence_res *res,
335 int rpc_status)
336{
337 unsigned long timestamp;
338 struct nfs4_slot_table *tbl;
339 struct nfs4_slot *slot;
340
341 /*
342 * sr_status remains 1 if an RPC level error occurred. The server
343 * may or may not have processed the sequence operation..
344 * Proceed as if the server received and processed the sequence
345 * operation.
346 */
347 if (res->sr_status == 1)
348 res->sr_status = NFS_OK;
349
350 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
351 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
352 goto out;
353
354 tbl = &clp->cl_session->fc_slot_table;
355 slot = tbl->slots + res->sr_slotid;
356
357 if (res->sr_status == 0) {
358 /* Update the slot's sequence and clientid lease timer */
359 ++slot->seq_nr;
360 timestamp = res->sr_renewal_time;
361 spin_lock(&clp->cl_lock);
362 if (time_before(clp->cl_last_renewal, timestamp))
363 clp->cl_last_renewal = timestamp;
364 spin_unlock(&clp->cl_lock);
365 return;
366 }
367out:
368 /* The session may be reset by one of the error handlers. */
369 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
370 nfs41_sequence_free_slot(clp, res);
371}
372
510b8175
BH		 373/*
374 * nfs4_find_slot - efficiently look for a free slot
375 *
376 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
377 * If found, we mark the slot as used, update the highest_used_slotid,
378 * and respectively set up the sequence operation args.
379 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 380 *
381 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 382 */
383static u8
384nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
385{
386 int slotid;
387 u8 ret_id = NFS4_MAX_SLOT_TABLE;
388 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
389
510b8175
BH		 390 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
391 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
392 tbl->max_slots);
393 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
394 if (slotid >= tbl->max_slots)
395 goto out;
396 __set_bit(slotid, tbl->used_slots);
397 if (slotid > tbl->highest_used_slotid)
398 tbl->highest_used_slotid = slotid;
399 ret_id = slotid;
400out:
401 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
402 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 403 return ret_id;
404}
405
ce5039c1
AA		 406static int nfs41_setup_sequence(struct nfs4_session *session,
407 struct nfs4_sequence_args *args,
408 struct nfs4_sequence_res *res,
409 int cache_reply,
410 struct rpc_task *task)
411{
fbcd4abc
AA		 412 struct nfs4_slot *slot;
413 struct nfs4_slot_table *tbl;
414 u8 slotid;
415
416 dprintk("--> %s\n", __func__);
ce5039c1
AA		 417 /* slot already allocated? */
418 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
419 return 0;
420
421 memset(res, 0, sizeof(*res));
422 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 423 tbl = &session->fc_slot_table;
424
425 spin_lock(&tbl->slot_tbl_lock);
426 slotid = nfs4_find_slot(tbl, task);
427 if (slotid == NFS4_MAX_SLOT_TABLE) {
428 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
429 spin_unlock(&tbl->slot_tbl_lock);
430 dprintk("<-- %s: no free slots\n", __func__);
431 return -EAGAIN;
432 }
433 spin_unlock(&tbl->slot_tbl_lock);
434
435 slot = tbl->slots + slotid;
436 args->sa_slotid = slotid;
437 args->sa_cache_this = cache_reply;
438
439 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
440
441 res->sr_slotid = slotid;
442 res->sr_renewal_time = jiffies;
443 /*
444 * sr_status is only set in decode_sequence, and so will remain
445 * set to 1 if an rpc level failure occurs.
446 */
447 res->sr_status = 1;
ce5039c1
AA		 448 return 0;
449}
450
451int nfs4_setup_sequence(struct nfs_client *clp,
452 struct nfs4_sequence_args *args,
453 struct nfs4_sequence_res *res,
454 int cache_reply,
455 struct rpc_task *task)
456{
457 int ret = 0;
458
459 dprintk("--> %s clp %p session %p sr_slotid %d\n",
460 __func__, clp, clp->cl_session, res->sr_slotid);
461
462 if (!nfs4_has_session(clp))
463 goto out;
464 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
465 task);
466 if (ret != -EAGAIN) {
467 /* terminate rpc task */
468 task->tk_status = ret;
469 task->tk_action = NULL;
470 }
471out:
472 dprintk("<-- %s status=%d\n", __func__, ret);
473 return ret;
474}
475
476struct nfs41_call_sync_data {
477 struct nfs_client *clp;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480 int cache_reply;
481};
482
483static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
484{
485 struct nfs41_call_sync_data *data = calldata;
486
487 dprintk("--> %s data->clp->cl_session %p\n", __func__,
488 data->clp->cl_session);
489 if (nfs4_setup_sequence(data->clp, data->seq_args,
490 data->seq_res, data->cache_reply, task))
491 return;
492 rpc_call_start(task);
493}
494
69ab40c4
AA		 495static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
496{
497 struct nfs41_call_sync_data *data = calldata;
498
499 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
500 nfs41_sequence_free_slot(data->clp, data->seq_res);
501}
502
ce5039c1
AA		 503struct rpc_call_ops nfs41_call_sync_ops = {
504 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 505 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 506};
507
508static int nfs4_call_sync_sequence(struct nfs_client *clp,
509 struct rpc_clnt *clnt,
510 struct rpc_message *msg,
511 struct nfs4_sequence_args *args,
512 struct nfs4_sequence_res *res,
513 int cache_reply)
514{
515 int ret;
516 struct rpc_task *task;
517 struct nfs41_call_sync_data data = {
518 .clp = clp,
519 .seq_args = args,
520 .seq_res = res,
521 .cache_reply = cache_reply,
522 };
523 struct rpc_task_setup task_setup = {
524 .rpc_client = clnt,
525 .rpc_message = msg,
526 .callback_ops = &nfs41_call_sync_ops,
527 .callback_data = &data
528 };
529
530 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
531 task = rpc_run_task(&task_setup);
532 if (IS_ERR(task))
533 ret = PTR_ERR(task);
534 else {
535 ret = task->tk_status;
536 rpc_put_task(task);
537 }
538 return ret;
539}
540
cccef3b9
AA		 541int _nfs4_call_sync_session(struct nfs_server *server,
542 struct rpc_message *msg,
543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
545 int cache_reply)
546{
ce5039c1
AA		 547 return nfs4_call_sync_sequence(server->nfs_client, server->client,
548 msg, args, res, cache_reply);
cccef3b9
AA		 549}
550
551#endif /* CONFIG_NFS_V4_1 */
552
553int _nfs4_call_sync(struct nfs_server *server,
554 struct rpc_message *msg,
555 struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res,
557 int cache_reply)
558{
f3752975 559 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 560 return rpc_call_sync(server->client, msg, 0);
561}
562
563#define nfs4_call_sync(server, msg, args, res, cache_reply) \
564 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
565 &(res)->seq_res, (cache_reply))
566
b0df806c
AA		 567static void nfs4_sequence_done(const struct nfs_server *server,
568 struct nfs4_sequence_res *res, int rpc_status)
569{
570#ifdef CONFIG_NFS_V4_1
571 if (nfs4_has_session(server->nfs_client))
572 nfs41_sequence_done(server->nfs_client, res, rpc_status);
573#endif /* CONFIG_NFS_V4_1 */
574}
575
576/* no restart, therefore free slot here */
577static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
578 struct nfs4_sequence_res *res,
579 int rpc_status)
580{
581 nfs4_sequence_done(server, res, rpc_status);
582 nfs4_sequence_free_slot(server->nfs_client, res);
583}
584
38478b24 585static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 586{
38478b24 587 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 588
38478b24 589 spin_lock(&dir->i_lock);
40d24704
TM		 590 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
591 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 592 nfs_force_lookup_revalidate(dir);
40d24704 593 nfsi->change_attr = cinfo->after;
38478b24 594 spin_unlock(&dir->i_lock);
1da177e4
LT		 595}
596
e56e0b78 597struct nfs4_opendata {
c6d00e63 598 struct kref kref;
e56e0b78
TM		 599 struct nfs_openargs o_arg;
600 struct nfs_openres o_res;
cdd4e68b
TM		 601 struct nfs_open_confirmargs c_arg;
602 struct nfs_open_confirmres c_res;
e56e0b78
TM		 603 struct nfs_fattr f_attr;
604 struct nfs_fattr dir_attr;
ad389da7 605 struct path path;
e56e0b78
TM		 606 struct dentry *dir;
607 struct nfs4_state_owner *owner;
aac00a8d 608 struct nfs4_state *state;
e56e0b78 609 struct iattr attrs;
26e976a8 610 unsigned long timestamp;
3e309914 611 unsigned int rpc_done : 1;
24ac23ab
TM		 612 int rpc_status;
613 int cancelled;
e56e0b78
TM		 614};
615
2ced46c2
TM		 616
617static void nfs4_init_opendata_res(struct nfs4_opendata *p)
618{
619 p->o_res.f_attr = &p->f_attr;
620 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 621 p->o_res.seqid = p->o_arg.seqid;
622 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 623 p->o_res.server = p->o_arg.server;
624 nfs_fattr_init(&p->f_attr);
625 nfs_fattr_init(&p->dir_attr);
626}
627
ad389da7 628static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 629 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 630 const struct iattr *attrs)
631{
ad389da7 632 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 633 struct inode *dir = parent->d_inode;
634 struct nfs_server *server = NFS_SERVER(dir);
635 struct nfs4_opendata *p;
636
637 p = kzalloc(sizeof(*p), GFP_KERNEL);
638 if (p == NULL)
639 goto err;
640 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
641 if (p->o_arg.seqid == NULL)
642 goto err_free;
ad389da7
TM		 643 p->path.mnt = mntget(path->mnt);
644 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 645 p->dir = parent;
646 p->owner = sp;
647 atomic_inc(&sp->so_count);
648 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 649 p->o_arg.open_flags = flags;
650 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 651 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 652 p->o_arg.id = sp->so_owner_id.id;
ad389da7 653 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 654 p->o_arg.server = server;
655 p->o_arg.bitmask = server->attr_bitmask;
656 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 657 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 658 if (flags & O_EXCL) {
659 u32 *s = (u32 *) p->o_arg.u.verifier.data;
660 s[0] = jiffies;
661 s[1] = current->pid;
662 } else if (flags & O_CREAT) {
663 p->o_arg.u.attrs = &p->attrs;
664 memcpy(&p->attrs, attrs, sizeof(p->attrs));
665 }
cdd4e68b
TM		 666 p->c_arg.fh = &p->o_res.fh;
667 p->c_arg.stateid = &p->o_res.stateid;
668 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 669 nfs4_init_opendata_res(p);
c6d00e63 670 kref_init(&p->kref);
e56e0b78
TM		 671 return p;
672err_free:
673 kfree(p);
674err:
675 dput(parent);
676 return NULL;
677}
678
c6d00e63 679static void nfs4_opendata_free(struct kref *kref)
e56e0b78 680{
c6d00e63
TM		 681 struct nfs4_opendata *p = container_of(kref,
682 struct nfs4_opendata, kref);
683
684 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 685 if (p->state != NULL)
686 nfs4_put_open_state(p->state);
c6d00e63
TM		 687 nfs4_put_state_owner(p->owner);
688 dput(p->dir);
31f31db1 689 path_put(&p->path);
c6d00e63
TM		 690 kfree(p);
691}
692
693static void nfs4_opendata_put(struct nfs4_opendata *p)
694{
695 if (p != NULL)
696 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 697}
698
06f814a3
TM		 699static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
700{
06f814a3
TM		 701 int ret;
702
06f814a3 703 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 704 return ret;
705}
706
dc0b027d 707static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 708{
709 int ret = 0;
dc0b027d
TM		 710
711 if (open_mode & O_EXCL)
712 goto out;
713 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 714 case FMODE_READ:
715 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 716 break;
717 case FMODE_WRITE:
718 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 719 break;
720 case FMODE_READ|FMODE_WRITE:
721 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
722 }
dc0b027d 723out:
6ee41268
TM		 724 return ret;
725}
726
dc0b027d 727static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 728{
dc0b027d 729 if ((delegation->type & fmode) != fmode)
aac00a8d 730 return 0;
15c831bf 731 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 732 return 0;
b7391f44 733 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 734 return 1;
735}
736
dc0b027d 737static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 738{
dc0b027d 739 switch (fmode) {
e7616923
TM		 740 case FMODE_WRITE:
741 state->n_wronly++;
742 break;
743 case FMODE_READ:
744 state->n_rdonly++;
745 break;
746 case FMODE_READ|FMODE_WRITE:
747 state->n_rdwr++;
748 }
dc0b027d 749 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 750}
751
dc0b027d 752static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 753{
754 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
755 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
756 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 757 switch (fmode) {
003707c7
TM		 758 case FMODE_READ:
759 set_bit(NFS_O_RDONLY_STATE, &state->flags);
760 break;
761 case FMODE_WRITE:
762 set_bit(NFS_O_WRONLY_STATE, &state->flags);
763 break;
764 case FMODE_READ|FMODE_WRITE:
765 set_bit(NFS_O_RDWR_STATE, &state->flags);
766 }
e7616923
TM		 767}
768
dc0b027d 769static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 770{
8bda4e4c 771 write_seqlock(&state->seqlock);
dc0b027d 772 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 773 write_sequnlock(&state->seqlock);
003707c7
TM		 774}
775
dc0b027d 776static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 777{
8bda4e4c
TM		 778 /*
779 * Protect the call to nfs4_state_set_mode_locked and
780 * serialise the stateid update
781 */
782 write_seqlock(&state->seqlock);
003707c7
TM		 783 if (deleg_stateid != NULL) {
784 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
785 set_bit(NFS_DELEGATED_STATE, &state->flags);
786 }
787 if (open_stateid != NULL)
dc0b027d 788 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 789 write_sequnlock(&state->seqlock);
790 spin_lock(&state->owner->so_lock);
dc0b027d 791 update_open_stateflags(state, fmode);
ec073428 792 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 793}
794
dc0b027d 795static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 796{
797 struct nfs_inode *nfsi = NFS_I(state->inode);
798 struct nfs_delegation *deleg_cur;
799 int ret = 0;
800
dc0b027d 801 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 802
803 rcu_read_lock();
804 deleg_cur = rcu_dereference(nfsi->delegation);
805 if (deleg_cur == NULL)
806 goto no_delegation;
807
808 spin_lock(&deleg_cur->lock);
809 if (nfsi->delegation != deleg_cur ||
dc0b027d 810 (deleg_cur->type & fmode) != fmode)
34310430
TM		 811 goto no_delegation_unlock;
812
813 if (delegation == NULL)
814 delegation = &deleg_cur->stateid;
815 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
816 goto no_delegation_unlock;
817
b7391f44 818 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 819 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 820 ret = 1;
821no_delegation_unlock:
822 spin_unlock(&deleg_cur->lock);
823no_delegation:
824 rcu_read_unlock();
825
826 if (!ret && open_stateid != NULL) {
dc0b027d 827 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 828 ret = 1;
829 }
830
831 return ret;
832}
833
834
dc0b027d 835static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 836{
837 struct nfs_delegation *delegation;
838
839 rcu_read_lock();
840 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 841 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 842 rcu_read_unlock();
843 return;
844 }
845 rcu_read_unlock();
846 nfs_inode_return_delegation(inode);
847}
848
6ee41268 849static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 850{
851 struct nfs4_state *state = opendata->state;
852 struct nfs_inode *nfsi = NFS_I(state->inode);
853 struct nfs_delegation *delegation;
dc0b027d
TM		 854 int open_mode = opendata->o_arg.open_flags & O_EXCL;
855 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 856 nfs4_stateid stateid;
857 int ret = -EAGAIN;
858
aac00a8d 859 for (;;) {
dc0b027d 860 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 861 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 862 if (can_open_cached(state, fmode, open_mode)) {
863 update_open_stateflags(state, fmode);
6ee41268 864 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 865 goto out_return_state;
866 }
867 spin_unlock(&state->owner->so_lock);
868 }
34310430
TM		 869 rcu_read_lock();
870 delegation = rcu_dereference(nfsi->delegation);
871 if (delegation == NULL ||
dc0b027d 872 !can_open_delegated(delegation, fmode)) {
34310430 873 rcu_read_unlock();
aac00a8d 874 break;
34310430 875 }
aac00a8d
TM		 876 /* Save the delegation */
877 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
878 rcu_read_unlock();
af22f94a 879 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 880 if (ret != 0)
881 goto out;
882 ret = -EAGAIN;
34310430
TM		 883
884 /* Try to update the stateid using the delegation */
dc0b027d 885 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 886 goto out_return_state;
aac00a8d 887 }
aac00a8d
TM		 888out:
889 return ERR_PTR(ret);
890out_return_state:
891 atomic_inc(&state->count);
892 return state;
893}
894
24ac23ab
TM		 895static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
896{
897 struct inode *inode;
898 struct nfs4_state *state = NULL;
003707c7 899 struct nfs_delegation *delegation;
1b370bc2 900 int ret;
24ac23ab 901
aac00a8d 902 if (!data->rpc_done) {
6ee41268 903 state = nfs4_try_open_cached(data);
aac00a8d
TM		 904 goto out;
905 }
906
1b370bc2 907 ret = -EAGAIN;
24ac23ab 908 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 909 goto err;
24ac23ab 910 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 911 ret = PTR_ERR(inode);
03f28e3a 912 if (IS_ERR(inode))
1b370bc2
TM		 913 goto err;
914 ret = -ENOMEM;
24ac23ab
TM		 915 state = nfs4_get_open_state(inode, data->owner);
916 if (state == NULL)
1b370bc2 917 goto err_put_inode;
549d6ed5 918 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 919 int delegation_flags = 0;
920
003707c7
TM		 921 rcu_read_lock();
922 delegation = rcu_dereference(NFS_I(inode)->delegation);
923 if (delegation)
924 delegation_flags = delegation->flags;
925 rcu_read_unlock();
15c831bf 926 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 927 nfs_inode_set_delegation(state->inode,
928 data->owner->so_cred,
929 &data->o_res);
930 else
931 nfs_inode_reclaim_delegation(state->inode,
932 data->owner->so_cred,
933 &data->o_res);
934 }
34310430
TM		 935
936 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 937 data->o_arg.fmode);
24ac23ab 938 iput(inode);
aac00a8d 939out:
24ac23ab 940 return state;
1b370bc2
TM		 941err_put_inode:
942 iput(inode);
943err:
944 return ERR_PTR(ret);
24ac23ab
TM		 945}
946
864472e9
TM		 947static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
948{
949 struct nfs_inode *nfsi = NFS_I(state->inode);
950 struct nfs_open_context *ctx;
951
952 spin_lock(&state->inode->i_lock);
953 list_for_each_entry(ctx, &nfsi->open_files, list) {
954 if (ctx->state != state)
955 continue;
956 get_nfs_open_context(ctx);
957 spin_unlock(&state->inode->i_lock);
958 return ctx;
959 }
960 spin_unlock(&state->inode->i_lock);
961 return ERR_PTR(-ENOENT);
962}
963
6f220ed5
TM		 964static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
965{
966 struct nfs4_opendata *opendata;
967
dc0b027d 968 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 969 if (opendata == NULL)
970 return ERR_PTR(-ENOMEM);
971 opendata->state = state;
972 atomic_inc(&state->count);
973 return opendata;
974}
975
dc0b027d 976static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 977{
2ced46c2 978 struct nfs4_state *newstate;
864472e9
TM		 979 int ret;
980
dc0b027d
TM		 981 opendata->o_arg.open_flags = 0;
982 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 983 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
984 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
985 nfs4_init_opendata_res(opendata);
864472e9
TM		 986 ret = _nfs4_proc_open(opendata);
987 if (ret != 0)
988 return ret;
2ced46c2 989 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 990 if (IS_ERR(newstate))
991 return PTR_ERR(newstate);
dc0b027d 992 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 993 *res = newstate;
864472e9
TM		 994 return 0;
995}
996
997static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
998{
864472e9 999 struct nfs4_state *newstate;
864472e9
TM		 1000 int ret;
1001
1002 /* memory barrier prior to reading state->n_* */
2ced46c2 1003 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1004 smp_rmb();
1005 if (state->n_rdwr != 0) {
2ced46c2 1006 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1007 if (ret != 0)
1008 return ret;
2ced46c2
TM		 1009 if (newstate != state)
1010 return -ESTALE;
864472e9
TM		 1011 }
1012 if (state->n_wronly != 0) {
2ced46c2 1013 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1014 if (ret != 0)
1015 return ret;
2ced46c2
TM		 1016 if (newstate != state)
1017 return -ESTALE;
864472e9
TM		 1018 }
1019 if (state->n_rdonly != 0) {
2ced46c2 1020 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1021 if (ret != 0)
1022 return ret;
2ced46c2
TM		 1023 if (newstate != state)
1024 return -ESTALE;
864472e9 1025 }
1ac7e2fd
TM		 1026 /*
1027 * We may have performed cached opens for all three recoveries.
1028 * Check if we need to update the current stateid.
1029 */
1030 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1031 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1032 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1033 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1034 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1035 write_sequnlock(&state->seqlock);
1ac7e2fd 1036 }
864472e9
TM		 1037 return 0;
1038}
1039
1da177e4
LT		 1040/*
1041 * OPEN_RECLAIM:
1042 * reclaim state on the server after a reboot.
1da177e4 1043 */
539cd03a 1044static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1045{
1ac7e2fd 1046 struct nfs_delegation *delegation;
864472e9 1047 struct nfs4_opendata *opendata;
dc0b027d 1048 fmode_t delegation_type = 0;
1da177e4
LT		 1049 int status;
1050
6f220ed5
TM		 1051 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1052 if (IS_ERR(opendata))
1053 return PTR_ERR(opendata);
864472e9
TM		 1054 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1055 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1056 rcu_read_lock();
1057 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1058 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1059 delegation_type = delegation->type;
1ac7e2fd 1060 rcu_read_unlock();
864472e9
TM		 1061 opendata->o_arg.u.delegation_type = delegation_type;
1062 status = nfs4_open_recover(opendata, state);
c6d00e63 1063 nfs4_opendata_put(opendata);
1da177e4
LT		 1064 return status;
1065}
1066
539cd03a 1067static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1068{
1069 struct nfs_server *server = NFS_SERVER(state->inode);
1070 struct nfs4_exception exception = { };
1071 int err;
1072 do {
539cd03a 1073 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1074 if (err != -NFS4ERR_DELAY)
1075 break;
1076 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1077 } while (exception.retry);
1078 return err;
1079}
1080
864472e9
TM		 1081static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1082{
1083 struct nfs_open_context *ctx;
1084 int ret;
1085
1086 ctx = nfs4_state_find_open_context(state);
1087 if (IS_ERR(ctx))
1088 return PTR_ERR(ctx);
539cd03a 1089 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1090 put_nfs_open_context(ctx);
1091 return ret;
1092}
1093
13437e12 1094static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1095{
e56e0b78 1096 struct nfs4_opendata *opendata;
864472e9 1097 int ret;
1da177e4 1098
6f220ed5
TM		 1099 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1100 if (IS_ERR(opendata))
1101 return PTR_ERR(opendata);
e56e0b78 1102 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1103 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1104 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1105 ret = nfs4_open_recover(opendata, state);
c6d00e63 1106 nfs4_opendata_put(opendata);
864472e9 1107 return ret;
1da177e4
LT		 1108}
1109
13437e12 1110int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1111{
1112 struct nfs4_exception exception = { };
539cd03a 1113 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1114 int err;
1115 do {
13437e12 1116 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1117 switch (err) {
1118 case 0:
1119 return err;
1120 case -NFS4ERR_STALE_CLIENTID:
1121 case -NFS4ERR_STALE_STATEID:
1122 case -NFS4ERR_EXPIRED:
1123 /* Don't recall a delegation if it was lost */
7539bbab 1124 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1125 return err;
1126 }
1127 err = nfs4_handle_exception(server, err, &exception);
1128 } while (exception.retry);
1129 return err;
1130}
1131
cdd4e68b
TM		 1132static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1133{
1134 struct nfs4_opendata *data = calldata;
1135
1136 data->rpc_status = task->tk_status;
1137 if (RPC_ASSASSINATED(task))
1138 return;
26e976a8 1139 if (data->rpc_status == 0) {
cdd4e68b
TM		 1140 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1141 sizeof(data->o_res.stateid.data));
bb22629e 1142 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1143 renew_lease(data->o_res.server, data->timestamp);
3e309914 1144 data->rpc_done = 1;
26e976a8 1145 }
cdd4e68b
TM		 1146}
1147
1148static void nfs4_open_confirm_release(void *calldata)
1149{
1150 struct nfs4_opendata *data = calldata;
1151 struct nfs4_state *state = NULL;
1152
1153 /* If this request hasn't been cancelled, do nothing */
1154 if (data->cancelled == 0)
1155 goto out_free;
1156 /* In case of error, no cleanup! */
3e309914 1157 if (!data->rpc_done)
cdd4e68b 1158 goto out_free;
cdd4e68b 1159 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1160 if (!IS_ERR(state))
dc0b027d 1161 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1162out_free:
c6d00e63 1163 nfs4_opendata_put(data);
cdd4e68b
TM		 1164}
1165
1166static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1167 .rpc_call_done = nfs4_open_confirm_done,
1168 .rpc_release = nfs4_open_confirm_release,
1169};
1170
1171/*
1172 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1173 */
1174static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1175{
1176 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1177 struct rpc_task *task;
5138fde0
TM		 1178 struct rpc_message msg = {
1179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1180 .rpc_argp = &data->c_arg,
1181 .rpc_resp = &data->c_res,
1182 .rpc_cred = data->owner->so_cred,
1183 };
c970aa85
TM		 1184 struct rpc_task_setup task_setup_data = {
1185 .rpc_client = server->client,
5138fde0 1186 .rpc_message = &msg,
c970aa85
TM		 1187 .callback_ops = &nfs4_open_confirm_ops,
1188 .callback_data = data,
101070ca 1189 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1190 .flags = RPC_TASK_ASYNC,
1191 };
1da177e4
LT		 1192 int status;
1193
c6d00e63 1194 kref_get(&data->kref);
3e309914
TM		 1195 data->rpc_done = 0;
1196 data->rpc_status = 0;
5138fde0 1197 data->timestamp = jiffies;
c970aa85 1198 task = rpc_run_task(&task_setup_data);
7a1218a2 1199 if (IS_ERR(task))
cdd4e68b 1200 return PTR_ERR(task);
cdd4e68b
TM		 1201 status = nfs4_wait_for_completion_rpc_task(task);
1202 if (status != 0) {
1203 data->cancelled = 1;
1204 smp_wmb();
1205 } else
1206 status = data->rpc_status;
e6b3c4db 1207 rpc_put_task(task);
1da177e4
LT		 1208 return status;
1209}
1210
24ac23ab 1211static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1212{
24ac23ab
TM		 1213 struct nfs4_opendata *data = calldata;
1214 struct nfs4_state_owner *sp = data->owner;
5138fde0 1215
24ac23ab
TM		 1216 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1217 return;
aac00a8d
TM		 1218 /*
1219 * Check if we still need to send an OPEN call, or if we can use
1220 * a delegation instead.
1221 */
1222 if (data->state != NULL) {
1223 struct nfs_delegation *delegation;
1224
dc0b027d 1225 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1226 goto out_no_action;
aac00a8d
TM		 1227 rcu_read_lock();
1228 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1229 if (delegation != NULL &&
15c831bf 1230 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1231 rcu_read_unlock();
6ee41268 1232 goto out_no_action;
aac00a8d
TM		 1233 }
1234 rcu_read_unlock();
1235 }
24ac23ab 1236 /* Update sequence id. */
9f958ab8 1237 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1238 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1239 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1240 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1241 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1242 }
26e976a8 1243 data->timestamp = jiffies;
5138fde0 1244 rpc_call_start(task);
6ee41268
TM		 1245 return;
1246out_no_action:
1247 task->tk_action = NULL;
1248
24ac23ab 1249}
1da177e4 1250
24ac23ab
TM		 1251static void nfs4_open_done(struct rpc_task *task, void *calldata)
1252{
1253 struct nfs4_opendata *data = calldata;
1da177e4 1254
24ac23ab
TM		 1255 data->rpc_status = task->tk_status;
1256 if (RPC_ASSASSINATED(task))
1257 return;
1258 if (task->tk_status == 0) {
1259 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1260 case S_IFREG:
1261 break;
1262 case S_IFLNK:
24ac23ab 1263 data->rpc_status = -ELOOP;
6f926b5b
TM		 1264 break;
1265 case S_IFDIR:
24ac23ab 1266 data->rpc_status = -EISDIR;
6f926b5b
TM		 1267 break;
1268 default:
24ac23ab 1269 data->rpc_status = -ENOTDIR;
6f926b5b 1270 }
26e976a8 1271 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1272 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1273 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1274 }
3e309914 1275 data->rpc_done = 1;
24ac23ab 1276}
6f926b5b 1277
24ac23ab
TM		 1278static void nfs4_open_release(void *calldata)
1279{
1280 struct nfs4_opendata *data = calldata;
1281 struct nfs4_state *state = NULL;
1282
1283 /* If this request hasn't been cancelled, do nothing */
1284 if (data->cancelled == 0)
1285 goto out_free;
1286 /* In case of error, no cleanup! */
3e309914 1287 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1288 goto out_free;
1289 /* In case we need an open_confirm, no cleanup! */
1290 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1291 goto out_free;
24ac23ab 1292 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1293 if (!IS_ERR(state))
dc0b027d 1294 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1295out_free:
c6d00e63 1296 nfs4_opendata_put(data);
24ac23ab
TM		 1297}
1298
1299static const struct rpc_call_ops nfs4_open_ops = {
1300 .rpc_call_prepare = nfs4_open_prepare,
1301 .rpc_call_done = nfs4_open_done,
1302 .rpc_release = nfs4_open_release,
1303};
1304
1305/*
1306 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1307 */
1308static int _nfs4_proc_open(struct nfs4_opendata *data)
1309{
1310 struct inode *dir = data->dir->d_inode;
1311 struct nfs_server *server = NFS_SERVER(dir);
1312 struct nfs_openargs *o_arg = &data->o_arg;
1313 struct nfs_openres *o_res = &data->o_res;
1314 struct rpc_task *task;
5138fde0
TM		 1315 struct rpc_message msg = {
1316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1317 .rpc_argp = o_arg,
1318 .rpc_resp = o_res,
1319 .rpc_cred = data->owner->so_cred,
1320 };
c970aa85
TM		 1321 struct rpc_task_setup task_setup_data = {
1322 .rpc_client = server->client,
5138fde0 1323 .rpc_message = &msg,
c970aa85
TM		 1324 .callback_ops = &nfs4_open_ops,
1325 .callback_data = data,
101070ca 1326 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1327 .flags = RPC_TASK_ASYNC,
1328 };
24ac23ab
TM		 1329 int status;
1330
c6d00e63 1331 kref_get(&data->kref);
3e309914
TM		 1332 data->rpc_done = 0;
1333 data->rpc_status = 0;
2ced46c2 1334 data->cancelled = 0;
c970aa85 1335 task = rpc_run_task(&task_setup_data);
7a1218a2 1336 if (IS_ERR(task))
24ac23ab 1337 return PTR_ERR(task);
24ac23ab
TM		 1338 status = nfs4_wait_for_completion_rpc_task(task);
1339 if (status != 0) {
1340 data->cancelled = 1;
1341 smp_wmb();
1342 } else
1343 status = data->rpc_status;
e6b3c4db 1344 rpc_put_task(task);
3e309914 1345 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1346 return status;
1347
9936781d
TM		 1348 if (o_res->fh.size == 0)
1349 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1350
56ae19f3
TM		 1351 if (o_arg->open_flags & O_CREAT) {
1352 update_changeattr(dir, &o_res->cinfo);
1353 nfs_post_op_update_inode(dir, o_res->dir_attr);
1354 } else
1355 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1356 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1357 status = _nfs4_proc_open_confirm(data);
1da177e4 1358 if (status != 0)
24ac23ab 1359 return status;
1da177e4
LT		 1360 }
1361 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1362 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1363 return 0;
1da177e4
LT		 1364}
1365
10afec90 1366static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1367{
7539bbab 1368 struct nfs_client *clp = server->nfs_client;
6b30954e 1369 int ret;
58d9714a 1370
6b30954e 1371 for (;;) {
65de872e 1372 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1373 if (ret != 0)
1374 return ret;
e598d843
TM		 1375 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1376 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1377 break;
58d9714a 1378 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1379 }
1380 return 0;
58d9714a
TM		 1381}
1382
1da177e4
LT		 1383/*
1384 * OPEN_EXPIRED:
1385 * reclaim state on the server after a network partition.
1386 * Assumes caller holds the appropriate lock
1387 */
539cd03a 1388static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1389{
e56e0b78 1390 struct nfs4_opendata *opendata;
864472e9 1391 int ret;
1da177e4 1392
6f220ed5
TM		 1393 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1394 if (IS_ERR(opendata))
1395 return PTR_ERR(opendata);
864472e9 1396 ret = nfs4_open_recover(opendata, state);
35d05778 1397 if (ret == -ESTALE)
539cd03a 1398 d_drop(ctx->path.dentry);
c6d00e63 1399 nfs4_opendata_put(opendata);
864472e9 1400 return ret;
1da177e4
LT		 1401}
1402
539cd03a 1403static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1404{
539cd03a 1405 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1406 struct nfs4_exception exception = { };
1407 int err;
1408
1409 do {
539cd03a 1410 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1411 if (err != -NFS4ERR_DELAY)
1412 break;
1413 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1414 } while (exception.retry);
1415 return err;
1416}
1417
1da177e4
LT		 1418static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1419{
1da177e4 1420 struct nfs_open_context *ctx;
864472e9 1421 int ret;
1da177e4 1422
864472e9
TM		 1423 ctx = nfs4_state_find_open_context(state);
1424 if (IS_ERR(ctx))
1425 return PTR_ERR(ctx);
539cd03a 1426 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1427 put_nfs_open_context(ctx);
1428 return ret;
1da177e4
LT		 1429}
1430
aa53ed54
JL		 1431/*
1432 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1433 * fields corresponding to attributes that were used to store the verifier.
1434 * Make sure we clobber those fields in the later setattr call
1435 */
1436static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1437{
1438 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1439 !(sattr->ia_valid & ATTR_ATIME_SET))
1440 sattr->ia_valid |= ATTR_ATIME;
1441
1442 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1443 !(sattr->ia_valid & ATTR_MTIME_SET))
1444 sattr->ia_valid |= ATTR_MTIME;
1445}
1446
1da177e4 1447/*
24ac23ab 1448 * Returns a referenced nfs4_state
1da177e4 1449 */
dc0b027d 1450static 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		 1451{
1452 struct nfs4_state_owner *sp;
1453 struct nfs4_state *state = NULL;
1454 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1455 struct nfs4_opendata *opendata;
aac00a8d 1456 int status;
1da177e4
LT		 1457
1458 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1459 status = -ENOMEM;
1460 if (!(sp = nfs4_get_state_owner(server, cred))) {
1461 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1462 goto out_err;
1463 }
58d9714a
TM		 1464 status = nfs4_recover_expired_lease(server);
1465 if (status != 0)
b4454fe1 1466 goto err_put_state_owner;
aac00a8d 1467 if (path->dentry->d_inode != NULL)
dc0b027d 1468 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1469 status = -ENOMEM;
dc0b027d 1470 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1471 if (opendata == NULL)
95d35cb4 1472 goto err_put_state_owner;
1da177e4 1473
aac00a8d
TM		 1474 if (path->dentry->d_inode != NULL)
1475 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1476
24ac23ab 1477 status = _nfs4_proc_open(opendata);
1da177e4 1478 if (status != 0)
c6d00e63 1479 goto err_opendata_put;
1da177e4 1480
aa53ed54
JL		 1481 if (opendata->o_arg.open_flags & O_EXCL)
1482 nfs4_exclusive_attrset(opendata, sattr);
1483
24ac23ab 1484 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1485 status = PTR_ERR(state);
1486 if (IS_ERR(state))
c6d00e63 1487 goto err_opendata_put;
c6d00e63 1488 nfs4_opendata_put(opendata);
1da177e4 1489 nfs4_put_state_owner(sp);
1da177e4
LT		 1490 *res = state;
1491 return 0;
c6d00e63
TM		 1492err_opendata_put:
1493 nfs4_opendata_put(opendata);
e56e0b78
TM		 1494err_put_state_owner:
1495 nfs4_put_state_owner(sp);
1da177e4 1496out_err:
1da177e4
LT		 1497 *res = NULL;
1498 return status;
1499}
1500
1501
dc0b027d 1502static 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		 1503{
1504 struct nfs4_exception exception = { };
1505 struct nfs4_state *res;
1506 int status;
1507
1508 do {
dc0b027d 1509 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1510 if (status == 0)
1511 break;
1512 /* NOTE: BAD_SEQID means the server and client disagree about the
1513 * book-keeping w.r.t. state-changing operations
1514 * (OPEN/CLOSE/LOCK/LOCKU...)
1515 * It is actually a sign of a bug on the client or on the server.
1516 *
1517 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1518 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1519 * have unhashed the old state_owner for us, and that we can
1520 * therefore safely retry using a new one. We should still warn
1521 * the user though...
1522 */
1523 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1524 printk(KERN_WARNING "NFS: v4 server %s "
1525 " returned a bad sequence-id error!\n",
1526 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1527 exception.retry = 1;
1528 continue;
1529 }
550f5747
TM		 1530 /*
1531 * BAD_STATEID on OPEN means that the server cancelled our
1532 * state before it received the OPEN_CONFIRM.
1533 * Recover by retrying the request as per the discussion
1534 * on Page 181 of RFC3530.
1535 */
1536 if (status == -NFS4ERR_BAD_STATEID) {
1537 exception.retry = 1;
1538 continue;
1539 }
aac00a8d
TM		 1540 if (status == -EAGAIN) {
1541 /* We must have found a delegation */
1542 exception.retry = 1;
1543 continue;
1544 }
1da177e4
LT		 1545 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1546 status, &exception));
1547 } while (exception.retry);
1548 return res;
1549}
1550
659bfcd6
TM		 1551static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1552 struct nfs_fattr *fattr, struct iattr *sattr,
1553 struct nfs4_state *state)
1da177e4 1554{
3e4f6290 1555 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1556 struct nfs_setattrargs arg = {
3e4f6290 1557 .fh = NFS_FH(inode),
1da177e4
LT		 1558 .iap = sattr,
1559 .server = server,
1560 .bitmask = server->attr_bitmask,
1561 };
1562 struct nfs_setattrres res = {
1563 .fattr = fattr,
1564 .server = server,
1565 };
1566 struct rpc_message msg = {
659bfcd6
TM		 1567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1568 .rpc_argp = &arg,
1569 .rpc_resp = &res,
1570 .rpc_cred = cred,
1da177e4 1571 };
26e976a8 1572 unsigned long timestamp = jiffies;
65e4308d 1573 int status;
1da177e4 1574
0e574af1 1575 nfs_fattr_init(fattr);
1da177e4 1576
3e4f6290
TM		 1577 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1578 /* Use that stateid */
1579 } else if (state != NULL) {
08e9eac4
TM		 1580 nfs4_copy_stateid(&arg.stateid, state, current->files);
1581 } else
1da177e4
LT		 1582 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1583
cccef3b9 1584 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1585 if (status == 0 && state != NULL)
1586 renew_lease(server, timestamp);
65e4308d 1587 return status;
1da177e4
LT		 1588}
1589
659bfcd6
TM		 1590static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1591 struct nfs_fattr *fattr, struct iattr *sattr,
1592 struct nfs4_state *state)
1da177e4 1593{
3e4f6290 1594 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1595 struct nfs4_exception exception = { };
1596 int err;
1597 do {
1598 err = nfs4_handle_exception(server,
659bfcd6 1599 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1600 &exception);
1601 } while (exception.retry);
1602 return err;
1603}
1604
1605struct nfs4_closedata {
4a35bd41 1606 struct path path;
1da177e4
LT		 1607 struct inode *inode;
1608 struct nfs4_state *state;
1609 struct nfs_closeargs arg;
1610 struct nfs_closeres res;
516a6af6 1611 struct nfs_fattr fattr;
26e976a8 1612 unsigned long timestamp;
1da177e4
LT		 1613};
1614
963d8fe5 1615static void nfs4_free_closedata(void *data)
9512135d 1616{
963d8fe5
TM		 1617 struct nfs4_closedata *calldata = data;
1618 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1619
1620 nfs4_put_open_state(calldata->state);
1621 nfs_free_seqid(calldata->arg.seqid);
9512135d 1622 nfs4_put_state_owner(sp);
31f31db1 1623 path_put(&calldata->path);
9512135d
TM		 1624 kfree(calldata);
1625}
1626
963d8fe5 1627static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1628{
963d8fe5 1629 struct nfs4_closedata *calldata = data;
1da177e4 1630 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1631 struct nfs_server *server = NFS_SERVER(calldata->inode);
1632
4ce70ada
TM		 1633 if (RPC_ASSASSINATED(task))
1634 return;
1da177e4
LT		 1635 /* hmm. we are done with the inode, and in the process of freeing
1636 * the state_owner. we keep this around to process errors
1637 */
1da177e4
LT		 1638 switch (task->tk_status) {
1639 case 0:
45328c35 1640 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1641 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1642 break;
1643 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1644 case -NFS4ERR_OLD_STATEID:
1645 case -NFS4ERR_BAD_STATEID:
1da177e4 1646 case -NFS4ERR_EXPIRED:
dc0b027d 1647 if (calldata->arg.fmode == 0)
9e33bed5 1648 break;
1da177e4 1649 default:
9e33bed5 1650 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1651 rpc_restart_call(task);
1652 return;
1653 }
1654 }
516a6af6 1655 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1656}
1657
4ce70ada 1658static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1659{
4ce70ada 1660 struct nfs4_closedata *calldata = data;
9512135d 1661 struct nfs4_state *state = calldata->state;
003707c7 1662 int clear_rd, clear_wr, clear_rdwr;
9512135d 1663
963d8fe5 1664 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1665 return;
003707c7 1666
003707c7 1667 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1668 spin_lock(&state->owner->so_lock);
003707c7 1669 /* Calculate the change in open mode */
e7616923 1670 if (state->n_rdwr == 0) {
003707c7 1671 if (state->n_rdonly == 0) {
003707c7
TM		 1672 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1673 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1674 }
1675 if (state->n_wronly == 0) {
003707c7
TM		 1676 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1677 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1678 }
e7616923 1679 }
4cecb76f 1680 spin_unlock(&state->owner->so_lock);
003707c7 1681 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1682 /* Note: exit _without_ calling nfs4_close_done */
1683 task->tk_action = NULL;
9512135d
TM		 1684 return;
1685 }
516a6af6 1686 nfs_fattr_init(calldata->res.fattr);
45328c35 1687 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1688 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1689 calldata->arg.fmode = FMODE_READ;
45328c35 1690 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1691 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1692 calldata->arg.fmode = FMODE_WRITE;
45328c35 1693 }
26e976a8 1694 calldata->timestamp = jiffies;
5138fde0 1695 rpc_call_start(task);
1da177e4
LT		 1696}
1697
963d8fe5 1698static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1699 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1700 .rpc_call_done = nfs4_close_done,
1701 .rpc_release = nfs4_free_closedata,
1702};
1703
1da177e4
LT		 1704/*
1705 * It is possible for data to be read/written from a mem-mapped file
1706 * after the sys_close call (which hits the vfs layer as a flush).
1707 * This means that we can't safely call nfsv4 close on a file until
1708 * the inode is cleared. This in turn means that we are not good
1709 * NFSv4 citizens - we do not indicate to the server to update the file's
1710 * share state even when we are done with one of the three share
1711 * stateid's in the inode.
1712 *
1713 * NOTE: Caller must be holding the sp->so_owner semaphore!
1714 */
a49c3c77 1715int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1716{
4a35bd41 1717 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1718 struct nfs4_closedata *calldata;
b39e625b
TM		 1719 struct nfs4_state_owner *sp = state->owner;
1720 struct rpc_task *task;
5138fde0
TM		 1721 struct rpc_message msg = {
1722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1723 .rpc_cred = state->owner->so_cred,
1724 };
c970aa85
TM		 1725 struct rpc_task_setup task_setup_data = {
1726 .rpc_client = server->client,
5138fde0 1727 .rpc_message = &msg,
c970aa85 1728 .callback_ops = &nfs4_close_ops,
101070ca 1729 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1730 .flags = RPC_TASK_ASYNC,
1731 };
9512135d 1732 int status = -ENOMEM;
1da177e4 1733
9512135d 1734 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1735 if (calldata == NULL)
9512135d 1736 goto out;
4a35bd41 1737 calldata->inode = state->inode;
1da177e4 1738 calldata->state = state;
4a35bd41 1739 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1740 calldata->arg.stateid = &state->open_stateid;
1da177e4 1741 /* Serialization for the sequence id */
cee54fc9 1742 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1743 if (calldata->arg.seqid == NULL)
1744 goto out_free_calldata;
dc0b027d 1745 calldata->arg.fmode = 0;
a65318bf 1746 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1747 calldata->res.fattr = &calldata->fattr;
c1d51931 1748 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1749 calldata->res.server = server;
5f7dbd5c 1750 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1751 calldata->path.mnt = mntget(path->mnt);
1752 calldata->path.dentry = dget(path->dentry);
9512135d 1753
5138fde0
TM		 1754 msg.rpc_argp = &calldata->arg,
1755 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1756 task_setup_data.callback_data = calldata;
1757 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1758 if (IS_ERR(task))
1759 return PTR_ERR(task);
a49c3c77
TM		 1760 status = 0;
1761 if (wait)
1762 status = rpc_wait_for_completion_task(task);
b39e625b 1763 rpc_put_task(task);
a49c3c77 1764 return status;
9512135d
TM		 1765out_free_calldata:
1766 kfree(calldata);
1767out:
b39e625b
TM		 1768 nfs4_put_open_state(state);
1769 nfs4_put_state_owner(sp);
9512135d 1770 return status;
1da177e4
LT		 1771}
1772
dc0b027d 1773static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1774{
1775 struct file *filp;
1b45c46c 1776 int ret;
02a913a7 1777
1b45c46c 1778 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1779 if (fmode & FMODE_EXEC) {
af22f94a 1780 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1781 state->owner->so_cred,
1782 nd->intent.open.flags);
1783 if (ret < 0)
1784 goto out_close;
1785 }
4a35bd41 1786 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1787 if (!IS_ERR(filp)) {
1788 struct nfs_open_context *ctx;
cd3758e3 1789 ctx = nfs_file_open_context(filp);
02a913a7 1790 ctx->state = state;
95cf959b
TM		 1791 return 0;
1792 }
1b45c46c
TM		 1793 ret = PTR_ERR(filp);
1794out_close:
dc0b027d 1795 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1796 return ret;
02a913a7
TM		 1797}
1798
1799struct dentry *
1da177e4
LT		 1800nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1801{
ad389da7 1802 struct path path = {
4ac91378 1803 .mnt = nd->path.mnt,
ad389da7
TM		 1804 .dentry = dentry,
1805 };
4ac91378 1806 struct dentry *parent;
1da177e4
LT		 1807 struct iattr attr;
1808 struct rpc_cred *cred;
1809 struct nfs4_state *state;
02a913a7 1810 struct dentry *res;
dc0b027d 1811 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1812
1813 if (nd->flags & LOOKUP_CREATE) {
1814 attr.ia_mode = nd->intent.open.create_mode;
1815 attr.ia_valid = ATTR_MODE;
1816 if (!IS_POSIXACL(dir))
ce3b0f8d 1817 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1818 } else {
1819 attr.ia_valid = 0;
1820 BUG_ON(nd->intent.open.flags & O_CREAT);
1821 }
1822
98a8e323 1823 cred = rpc_lookup_cred();
1da177e4 1824 if (IS_ERR(cred))
02a913a7 1825 return (struct dentry *)cred;
565277f6
TM		 1826 parent = dentry->d_parent;
1827 /* Protect against concurrent sillydeletes */
1828 nfs_block_sillyrename(parent);
dc0b027d 1829 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1830 put_rpccred(cred);
02a913a7 1831 if (IS_ERR(state)) {
d75340cc 1832 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1833 d_add(dentry, NULL);
d75340cc
TM		 1834 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1835 }
565277f6 1836 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1837 return (struct dentry *)state;
1838 }
24ac23ab 1839 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1840 if (res != NULL)
deee9369 1841 path.dentry = res;
d75340cc 1842 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1843 nfs_unblock_sillyrename(parent);
dc0b027d 1844 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1845 return res;
1da177e4
LT		 1846}
1847
1848int
02a913a7 1849nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1850{
ad389da7 1851 struct path path = {
4ac91378 1852 .mnt = nd->path.mnt,
ad389da7
TM		 1853 .dentry = dentry,
1854 };
1da177e4
LT		 1855 struct rpc_cred *cred;
1856 struct nfs4_state *state;
dc0b027d 1857 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1858
98a8e323 1859 cred = rpc_lookup_cred();
1da177e4
LT		 1860 if (IS_ERR(cred))
1861 return PTR_ERR(cred);
dc0b027d 1862 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1863 put_rpccred(cred);
02a913a7
TM		 1864 if (IS_ERR(state)) {
1865 switch (PTR_ERR(state)) {
1866 case -EPERM:
1867 case -EACCES:
1868 case -EDQUOT:
1869 case -ENOSPC:
1870 case -EROFS:
1871 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1872 return 1;
b87c0adf
CL		 1873 default:
1874 goto out_drop;
02a913a7 1875 }
02a913a7 1876 }
24ac23ab 1877 if (state->inode == dentry->d_inode) {
d75340cc 1878 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1879 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1880 return 1;
1881 }
dc0b027d 1882 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1883out_drop:
1884 d_drop(dentry);
1da177e4
LT		 1885 return 0;
1886}
1887
7fe5c398
TM		 1888void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1889{
1890 if (ctx->state == NULL)
1891 return;
1892 if (is_sync)
1893 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1894 else
1895 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1896}
1da177e4
LT		 1897
1898static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1899{
43652ad5
BH		 1900 struct nfs4_server_caps_arg args = {
1901 .fhandle = fhandle,
1902 };
1da177e4
LT		 1903 struct nfs4_server_caps_res res = {};
1904 struct rpc_message msg = {
1905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1906 .rpc_argp = &args,
1da177e4
LT		 1907 .rpc_resp = &res,
1908 };
1909 int status;
1910
cccef3b9 1911 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1912 if (status == 0) {
1913 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1914 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1915 server->caps |= NFS_CAP_ACLS;
1916 if (res.has_links != 0)
1917 server->caps |= NFS_CAP_HARDLINKS;
1918 if (res.has_symlinks != 0)
1919 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1920 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1921 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1922 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1923 server->acl_bitmask = res.acl_bitmask;
1924 }
cccef3b9 1925
1da177e4
LT		 1926 return status;
1927}
1928
55a97593 1929int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1930{
1931 struct nfs4_exception exception = { };
1932 int err;
1933 do {
1934 err = nfs4_handle_exception(server,
1935 _nfs4_server_capabilities(server, fhandle),
1936 &exception);
1937 } while (exception.retry);
1938 return err;
1939}
1940
1941static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1942 struct nfs_fsinfo *info)
1943{
1da177e4
LT		 1944 struct nfs4_lookup_root_arg args = {
1945 .bitmask = nfs4_fattr_bitmap,
1946 };
1947 struct nfs4_lookup_res res = {
1948 .server = server,
0e574af1 1949 .fattr = info->fattr,
1da177e4
LT		 1950 .fh = fhandle,
1951 };
1952 struct rpc_message msg = {
1953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1954 .rpc_argp = &args,
1955 .rpc_resp = &res,
1956 };
0e574af1 1957 nfs_fattr_init(info->fattr);
cccef3b9 1958 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1959}
1960
1961static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1962 struct nfs_fsinfo *info)
1963{
1964 struct nfs4_exception exception = { };
1965 int err;
1966 do {
1967 err = nfs4_handle_exception(server,
1968 _nfs4_lookup_root(server, fhandle, info),
1969 &exception);
1970 } while (exception.retry);
1971 return err;
1972}
1973
54ceac45
DH		 1974/*
1975 * get the file handle for the "/" directory on the server
1976 */
1da177e4 1977static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1978 struct nfs_fsinfo *info)
1da177e4 1979{
1da177e4
LT		 1980 int status;
1981
1da177e4 1982 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1983 if (status == 0)
1984 status = nfs4_server_capabilities(server, fhandle);
1985 if (status == 0)
1986 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1987 return nfs4_map_errors(status);
1da177e4
LT		 1988}
1989
6b97fd3d
MN		 1990/*
1991 * Get locations and (maybe) other attributes of a referral.
1992 * Note that we'll actually follow the referral later when
1993 * we detect fsid mismatch in inode revalidation
1994 */
56659e99 1995static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1996{
1997 int status = -ENOMEM;
1998 struct page *page = NULL;
1999 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2000
2001 page = alloc_page(GFP_KERNEL);
2002 if (page == NULL)
2003 goto out;
2004 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2005 if (locations == NULL)
2006 goto out;
2007
c228fd3a 2008 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2009 if (status != 0)
2010 goto out;
2011 /* Make sure server returned a different fsid for the referral */
2012 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2013 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2014 status = -EIO;
2015 goto out;
2016 }
2017
2018 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2019 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2020 if (!fattr->mode)
2021 fattr->mode = S_IFDIR;
2022 memset(fhandle, 0, sizeof(struct nfs_fh));
2023out:
2024 if (page)
2025 __free_page(page);
2026 if (locations)
2027 kfree(locations);
2028 return status;
2029}
2030
1da177e4
LT		 2031static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2032{
2033 struct nfs4_getattr_arg args = {
2034 .fh = fhandle,
2035 .bitmask = server->attr_bitmask,
2036 };
2037 struct nfs4_getattr_res res = {
2038 .fattr = fattr,
2039 .server = server,
2040 };
2041 struct rpc_message msg = {
2042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2043 .rpc_argp = &args,
2044 .rpc_resp = &res,
2045 };
2046
0e574af1 2047 nfs_fattr_init(fattr);
cccef3b9 2048 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2049}
2050
2051static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2052{
2053 struct nfs4_exception exception = { };
2054 int err;
2055 do {
2056 err = nfs4_handle_exception(server,
2057 _nfs4_proc_getattr(server, fhandle, fattr),
2058 &exception);
2059 } while (exception.retry);
2060 return err;
2061}
2062
2063/*
2064 * The file is not closed if it is opened due to the a request to change
2065 * the size of the file. The open call will not be needed once the
2066 * VFS layer lookup-intents are implemented.
2067 *
2068 * Close is called when the inode is destroyed.
2069 * If we haven't opened the file for O_WRONLY, we
2070 * need to in the size_change case to obtain a stateid.
2071 *
2072 * Got race?
2073 * Because OPEN is always done by name in nfsv4, it is
2074 * possible that we opened a different file by the same
2075 * name. We can recognize this race condition, but we
2076 * can't do anything about it besides returning an error.
2077 *
2078 * This will be fixed with VFS changes (lookup-intent).
2079 */
2080static int
2081nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2082 struct iattr *sattr)
2083{
08e9eac4 2084 struct inode *inode = dentry->d_inode;
659bfcd6 2085 struct rpc_cred *cred = NULL;
d530838b 2086 struct nfs4_state *state = NULL;
1da177e4
LT		 2087 int status;
2088
0e574af1 2089 nfs_fattr_init(fattr);
1da177e4 2090
d530838b 2091 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2092 if (sattr->ia_valid & ATTR_FILE) {
2093 struct nfs_open_context *ctx;
2094
2095 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2096 if (ctx) {
2097 cred = ctx->cred;
2098 state = ctx->state;
2099 }
659bfcd6 2100 }
08e9eac4 2101
659bfcd6 2102 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2103 if (status == 0)
2104 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2105 return status;
2106}
2107
56659e99
TM		 2108static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2109 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2110 struct nfs_fattr *fattr)
2111{
2112 int status;
2113 struct nfs4_lookup_arg args = {
2114 .bitmask = server->attr_bitmask,
2115 .dir_fh = dirfh,
2116 .name = name,
2117 };
2118 struct nfs4_lookup_res res = {
2119 .server = server,
2120 .fattr = fattr,
2121 .fh = fhandle,
2122 };
2123 struct rpc_message msg = {
2124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2125 .rpc_argp = &args,
2126 .rpc_resp = &res,
2127 };
2128
2129 nfs_fattr_init(fattr);
2130
2131 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2132 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2133 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2134 return status;
2135}
2136
2137static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2138 struct qstr *name, struct nfs_fh *fhandle,
2139 struct nfs_fattr *fattr)
2140{
2141 struct nfs4_exception exception = { };
2142 int err;
2143 do {
4e56e082
TM		 2144 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2145 /* FIXME: !!!! */
2146 if (err == -NFS4ERR_MOVED) {
2147 err = -EREMOTE;
2148 break;
2149 }
2150 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2151 } while (exception.retry);
2152 return err;
2153}
2154
56659e99 2155static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2156 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2157{
4e56e082 2158 int status;
1da177e4
LT		 2159
2160 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2161 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2162 if (status == -NFS4ERR_MOVED)
2163 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2164 dprintk("NFS reply lookup: %d\n", status);
2165 return status;
2166}
2167
2168static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2169{
2170 struct nfs4_exception exception = { };
2171 int err;
2172 do {
2173 err = nfs4_handle_exception(NFS_SERVER(dir),
2174 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2175 &exception);
2176 } while (exception.retry);
2177 return err;
2178}
2179
2180static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2181{
76b32999
TM		 2182 struct nfs_server *server = NFS_SERVER(inode);
2183 struct nfs_fattr fattr;
1da177e4
LT		 2184 struct nfs4_accessargs args = {
2185 .fh = NFS_FH(inode),
76b32999
TM		 2186 .bitmask = server->attr_bitmask,
2187 };
2188 struct nfs4_accessres res = {
2189 .server = server,
2190 .fattr = &fattr,
1da177e4 2191 };
1da177e4
LT		 2192 struct rpc_message msg = {
2193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2194 .rpc_argp = &args,
2195 .rpc_resp = &res,
2196 .rpc_cred = entry->cred,
2197 };
2198 int mode = entry->mask;
2199 int status;
2200
2201 /*
2202 * Determine which access bits we want to ask for...
2203 */
2204 if (mode & MAY_READ)
2205 args.access |= NFS4_ACCESS_READ;
2206 if (S_ISDIR(inode->i_mode)) {
2207 if (mode & MAY_WRITE)
2208 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2209 if (mode & MAY_EXEC)
2210 args.access |= NFS4_ACCESS_LOOKUP;
2211 } else {
2212 if (mode & MAY_WRITE)
2213 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2214 if (mode & MAY_EXEC)
2215 args.access |= NFS4_ACCESS_EXECUTE;
2216 }
76b32999 2217 nfs_fattr_init(&fattr);
cccef3b9 2218 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2219 if (!status) {
2220 entry->mask = 0;
2221 if (res.access & NFS4_ACCESS_READ)
2222 entry->mask |= MAY_READ;
2223 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2224 entry->mask |= MAY_WRITE;
2225 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2226 entry->mask |= MAY_EXEC;
76b32999 2227 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2228 }
2229 return status;
2230}
2231
2232static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2233{
2234 struct nfs4_exception exception = { };
2235 int err;
2236 do {
2237 err = nfs4_handle_exception(NFS_SERVER(inode),
2238 _nfs4_proc_access(inode, entry),
2239 &exception);
2240 } while (exception.retry);
2241 return err;
2242}
2243
2244/*
2245 * TODO: For the time being, we don't try to get any attributes
2246 * along with any of the zero-copy operations READ, READDIR,
2247 * READLINK, WRITE.
2248 *
2249 * In the case of the first three, we want to put the GETATTR
2250 * after the read-type operation -- this is because it is hard
2251 * to predict the length of a GETATTR response in v4, and thus
2252 * align the READ data correctly. This means that the GETATTR
2253 * may end up partially falling into the page cache, and we should
2254 * shift it into the 'tail' of the xdr_buf before processing.
2255 * To do this efficiently, we need to know the total length
2256 * of data received, which doesn't seem to be available outside
2257 * of the RPC layer.
2258 *
2259 * In the case of WRITE, we also want to put the GETATTR after
2260 * the operation -- in this case because we want to make sure
2261 * we get the post-operation mtime and size. This means that
2262 * we can't use xdr_encode_pages() as written: we need a variant
2263 * of it which would leave room in the 'tail' iovec.
2264 *
2265 * Both of these changes to the XDR layer would in fact be quite
2266 * minor, but I decided to leave them for a subsequent patch.
2267 */
2268static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2269 unsigned int pgbase, unsigned int pglen)
2270{
2271 struct nfs4_readlink args = {
2272 .fh = NFS_FH(inode),
2273 .pgbase = pgbase,
2274 .pglen = pglen,
2275 .pages = &page,
2276 };
f50c7000 2277 struct nfs4_readlink_res res;
1da177e4
LT		 2278 struct rpc_message msg = {
2279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2280 .rpc_argp = &args,
f50c7000 2281 .rpc_resp = &res,
1da177e4
LT		 2282 };
2283
cccef3b9 2284 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2285}
2286
2287static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2288 unsigned int pgbase, unsigned int pglen)
2289{
2290 struct nfs4_exception exception = { };
2291 int err;
2292 do {
2293 err = nfs4_handle_exception(NFS_SERVER(inode),
2294 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2295 &exception);
2296 } while (exception.retry);
2297 return err;
2298}
2299
1da177e4
LT		 2300/*
2301 * Got race?
2302 * We will need to arrange for the VFS layer to provide an atomic open.
2303 * Until then, this create/open method is prone to inefficiency and race
2304 * conditions due to the lookup, create, and open VFS calls from sys_open()
2305 * placed on the wire.
2306 *
2307 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2308 * The file will be opened again in the subsequent VFS open call
2309 * (nfs4_proc_file_open).
2310 *
2311 * The open for read will just hang around to be used by any process that
2312 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2313 */
2314
2315static int
2316nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2317 int flags, struct nameidata *nd)
1da177e4 2318{
ad389da7 2319 struct path path = {
4ac91378 2320 .mnt = nd->path.mnt,
ad389da7
TM		 2321 .dentry = dentry,
2322 };
1da177e4
LT		 2323 struct nfs4_state *state;
2324 struct rpc_cred *cred;
dc0b027d 2325 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2326 int status = 0;
2327
98a8e323 2328 cred = rpc_lookup_cred();
1da177e4
LT		 2329 if (IS_ERR(cred)) {
2330 status = PTR_ERR(cred);
2331 goto out;
2332 }
dc0b027d 2333 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2334 d_drop(dentry);
1da177e4
LT		 2335 if (IS_ERR(state)) {
2336 status = PTR_ERR(state);
659bfcd6 2337 goto out_putcred;
1da177e4 2338 }
d4d9cdcb 2339 d_add(dentry, igrab(state->inode));
d75340cc 2340 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2341 if (flags & O_EXCL) {
2342 struct nfs_fattr fattr;
659bfcd6 2343 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2344 if (status == 0)
65e4308d 2345 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2346 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2347 }
ad389da7 2348 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2349 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2350 else
dc0b027d 2351 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2352out_putcred:
2353 put_rpccred(cred);
1da177e4
LT		 2354out:
2355 return status;
2356}
2357
2358static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2359{
16e42959 2360 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2361 struct nfs_removeargs args = {
1da177e4 2362 .fh = NFS_FH(dir),
4fdc17b2
TM		 2363 .name.len = name->len,
2364 .name.name = name->name,
16e42959
TM		 2365 .bitmask = server->attr_bitmask,
2366 };
4fdc17b2 2367 struct nfs_removeres res = {
16e42959 2368 .server = server,
1da177e4 2369 };
1da177e4 2370 struct rpc_message msg = {
4fdc17b2
TM		 2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
1da177e4
LT		 2374 };
2375 int status;
2376
4fdc17b2 2377 nfs_fattr_init(&res.dir_attr);
cccef3b9 2378 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2379 if (status == 0) {
2380 update_changeattr(dir, &res.cinfo);
4fdc17b2 2381 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2382 }
1da177e4
LT		 2383 return status;
2384}
2385
2386static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2387{
2388 struct nfs4_exception exception = { };
2389 int err;
2390 do {
2391 err = nfs4_handle_exception(NFS_SERVER(dir),
2392 _nfs4_proc_remove(dir, name),
2393 &exception);
2394 } while (exception.retry);
2395 return err;
2396}
2397
e4eff1a6 2398static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2399{
e4eff1a6
TM		 2400 struct nfs_server *server = NFS_SERVER(dir);
2401 struct nfs_removeargs *args = msg->rpc_argp;
2402 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2403
a65318bf 2404 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2405 res->server = server;
1da177e4 2406 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2407}
2408
e4eff1a6 2409static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2410{
e4eff1a6
TM		 2411 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2412
9e33bed5 2413 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2414 return 0;
2415 update_changeattr(dir, &res->cinfo);
2416 nfs_post_op_update_inode(dir, &res->dir_attr);
2417 return 1;
1da177e4
LT		 2418}
2419
2420static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2421 struct inode *new_dir, struct qstr *new_name)
2422{
6caf2c82 2423 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2424 struct nfs4_rename_arg arg = {
2425 .old_dir = NFS_FH(old_dir),
2426 .new_dir = NFS_FH(new_dir),
2427 .old_name = old_name,
2428 .new_name = new_name,
6caf2c82
TM		 2429 .bitmask = server->attr_bitmask,
2430 };
2431 struct nfs_fattr old_fattr, new_fattr;
2432 struct nfs4_rename_res res = {
2433 .server = server,
2434 .old_fattr = &old_fattr,
2435 .new_fattr = &new_fattr,
1da177e4 2436 };
1da177e4
LT		 2437 struct rpc_message msg = {
2438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2439 .rpc_argp = &arg,
2440 .rpc_resp = &res,
2441 };
2442 int status;
2443
6caf2c82
TM		 2444 nfs_fattr_init(res.old_fattr);
2445 nfs_fattr_init(res.new_fattr);
cccef3b9 2446 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2447
2448 if (!status) {
2449 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2450 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2451 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2452 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2453 }
2454 return status;
2455}
2456
2457static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2458 struct inode *new_dir, struct qstr *new_name)
2459{
2460 struct nfs4_exception exception = { };
2461 int err;
2462 do {
2463 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2464 _nfs4_proc_rename(old_dir, old_name,
2465 new_dir, new_name),
2466 &exception);
2467 } while (exception.retry);
2468 return err;
2469}
2470
2471static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2472{
91ba2eee 2473 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2474 struct nfs4_link_arg arg = {
2475 .fh = NFS_FH(inode),
2476 .dir_fh = NFS_FH(dir),
2477 .name = name,
91ba2eee
TM		 2478 .bitmask = server->attr_bitmask,
2479 };
2480 struct nfs_fattr fattr, dir_attr;
2481 struct nfs4_link_res res = {
2482 .server = server,
2483 .fattr = &fattr,
2484 .dir_attr = &dir_attr,
1da177e4 2485 };
1da177e4
LT		 2486 struct rpc_message msg = {
2487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2488 .rpc_argp = &arg,
91ba2eee 2489 .rpc_resp = &res,
1da177e4
LT		 2490 };
2491 int status;
2492
91ba2eee
TM		 2493 nfs_fattr_init(res.fattr);
2494 nfs_fattr_init(res.dir_attr);
cccef3b9 2495 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2496 if (!status) {
2497 update_changeattr(dir, &res.cinfo);
2498 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2499 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2500 }
1da177e4
LT		 2501
2502 return status;
2503}
2504
2505static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 err = nfs4_handle_exception(NFS_SERVER(inode),
2511 _nfs4_proc_link(inode, dir, name),
2512 &exception);
2513 } while (exception.retry);
2514 return err;
2515}
2516
57dc9a57
TM		 2517struct nfs4_createdata {
2518 struct rpc_message msg;
2519 struct nfs4_create_arg arg;
2520 struct nfs4_create_res res;
2521 struct nfs_fh fh;
2522 struct nfs_fattr fattr;
2523 struct nfs_fattr dir_fattr;
2524};
2525
2526static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2527 struct qstr *name, struct iattr *sattr, u32 ftype)
2528{
2529 struct nfs4_createdata *data;
2530
2531 data = kzalloc(sizeof(*data), GFP_KERNEL);
2532 if (data != NULL) {
2533 struct nfs_server *server = NFS_SERVER(dir);
2534
2535 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2536 data->msg.rpc_argp = &data->arg;
2537 data->msg.rpc_resp = &data->res;
2538 data->arg.dir_fh = NFS_FH(dir);
2539 data->arg.server = server;
2540 data->arg.name = name;
2541 data->arg.attrs = sattr;
2542 data->arg.ftype = ftype;
2543 data->arg.bitmask = server->attr_bitmask;
2544 data->res.server = server;
2545 data->res.fh = &data->fh;
2546 data->res.fattr = &data->fattr;
2547 data->res.dir_fattr = &data->dir_fattr;
2548 nfs_fattr_init(data->res.fattr);
2549 nfs_fattr_init(data->res.dir_fattr);
2550 }
2551 return data;
2552}
2553
2554static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2555{
cccef3b9
AA		 2556 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2557 &data->arg, &data->res, 1);
57dc9a57
TM		 2558 if (status == 0) {
2559 update_changeattr(dir, &data->res.dir_cinfo);
2560 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2561 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2562 }
2563 return status;
2564}
2565
2566static void nfs4_free_createdata(struct nfs4_createdata *data)
2567{
2568 kfree(data);
2569}
2570
4f390c15 2571static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2572 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2573{
57dc9a57
TM		 2574 struct nfs4_createdata *data;
2575 int status = -ENAMETOOLONG;
1da177e4 2576
94a6d753 2577 if (len > NFS4_MAXPATHLEN)
57dc9a57 2578 goto out;
4f390c15 2579
57dc9a57
TM		 2580 status = -ENOMEM;
2581 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2582 if (data == NULL)
2583 goto out;
2584
2585 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2586 data->arg.u.symlink.pages = &page;
2587 data->arg.u.symlink.len = len;
1da177e4 2588
57dc9a57
TM		 2589 status = nfs4_do_create(dir, dentry, data);
2590
2591 nfs4_free_createdata(data);
2592out:
1da177e4
LT		 2593 return status;
2594}
2595
4f390c15 2596static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2597 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2598{
2599 struct nfs4_exception exception = { };
2600 int err;
2601 do {
2602 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2603 _nfs4_proc_symlink(dir, dentry, page,
2604 len, sattr),
1da177e4
LT		 2605 &exception);
2606 } while (exception.retry);
2607 return err;
2608}
2609
2610static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2611 struct iattr *sattr)
2612{
57dc9a57
TM		 2613 struct nfs4_createdata *data;
2614 int status = -ENOMEM;
1da177e4 2615
57dc9a57
TM		 2616 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2617 if (data == NULL)
2618 goto out;
2619
2620 status = nfs4_do_create(dir, dentry, data);
2621
2622 nfs4_free_createdata(data);
2623out:
1da177e4
LT		 2624 return status;
2625}
2626
2627static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2628 struct iattr *sattr)
2629{
2630 struct nfs4_exception exception = { };
2631 int err;
2632 do {
2633 err = nfs4_handle_exception(NFS_SERVER(dir),
2634 _nfs4_proc_mkdir(dir, dentry, sattr),
2635 &exception);
2636 } while (exception.retry);
2637 return err;
2638}
2639
2640static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2641 u64 cookie, struct page *page, unsigned int count, int plus)
2642{
2643 struct inode *dir = dentry->d_inode;
2644 struct nfs4_readdir_arg args = {
2645 .fh = NFS_FH(dir),
2646 .pages = &page,
2647 .pgbase = 0,
2648 .count = count,
a65318bf 2649 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2650 };
2651 struct nfs4_readdir_res res;
2652 struct rpc_message msg = {
2653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2654 .rpc_argp = &args,
2655 .rpc_resp = &res,
2656 .rpc_cred = cred,
2657 };
2658 int status;
2659
3110ff80 2660 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2661 dentry->d_parent->d_name.name,
2662 dentry->d_name.name,
2663 (unsigned long long)cookie);
1da177e4
LT		 2664 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2665 res.pgbase = args.pgbase;
cccef3b9 2666 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2667 if (status == 0)
2668 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2669
2670 nfs_invalidate_atime(dir);
2671
3110ff80 2672 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2673 return status;
2674}
2675
2676static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2677 u64 cookie, struct page *page, unsigned int count, int plus)
2678{
2679 struct nfs4_exception exception = { };
2680 int err;
2681 do {
2682 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2683 _nfs4_proc_readdir(dentry, cred, cookie,
2684 page, count, plus),
2685 &exception);
2686 } while (exception.retry);
2687 return err;
2688}
2689
2690static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2691 struct iattr *sattr, dev_t rdev)
2692{
57dc9a57
TM		 2693 struct nfs4_createdata *data;
2694 int mode = sattr->ia_mode;
2695 int status = -ENOMEM;
1da177e4
LT		 2696
2697 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2698 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2699
2700 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2701 if (data == NULL)
2702 goto out;
2703
1da177e4 2704 if (S_ISFIFO(mode))
57dc9a57 2705 data->arg.ftype = NF4FIFO;
1da177e4 2706 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2707 data->arg.ftype = NF4BLK;
2708 data->arg.u.device.specdata1 = MAJOR(rdev);
2709 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2710 }
2711 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2712 data->arg.ftype = NF4CHR;
2713 data->arg.u.device.specdata1 = MAJOR(rdev);
2714 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2715 }
1da177e4 2716
57dc9a57
TM		 2717 status = nfs4_do_create(dir, dentry, data);
2718
2719 nfs4_free_createdata(data);
2720out:
1da177e4
LT		 2721 return status;
2722}
2723
2724static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2725 struct iattr *sattr, dev_t rdev)
2726{
2727 struct nfs4_exception exception = { };
2728 int err;
2729 do {
2730 err = nfs4_handle_exception(NFS_SERVER(dir),
2731 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2732 &exception);
2733 } while (exception.retry);
2734 return err;
2735}
2736
2737static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2738 struct nfs_fsstat *fsstat)
2739{
2740 struct nfs4_statfs_arg args = {
2741 .fh = fhandle,
2742 .bitmask = server->attr_bitmask,
2743 };
24ad148a
BH		 2744 struct nfs4_statfs_res res = {
2745 .fsstat = fsstat,
2746 };
1da177e4
LT		 2747 struct rpc_message msg = {
2748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2749 .rpc_argp = &args,
24ad148a 2750 .rpc_resp = &res,
1da177e4
LT		 2751 };
2752
0e574af1 2753 nfs_fattr_init(fsstat->fattr);
cccef3b9 2754 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2755}
2756
2757static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2758{
2759 struct nfs4_exception exception = { };
2760 int err;
2761 do {
2762 err = nfs4_handle_exception(server,
2763 _nfs4_proc_statfs(server, fhandle, fsstat),
2764 &exception);
2765 } while (exception.retry);
2766 return err;
2767}
2768
2769static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2770 struct nfs_fsinfo *fsinfo)
2771{
2772 struct nfs4_fsinfo_arg args = {
2773 .fh = fhandle,
2774 .bitmask = server->attr_bitmask,
2775 };
3dda5e43
BH		 2776 struct nfs4_fsinfo_res res = {
2777 .fsinfo = fsinfo,
2778 };
1da177e4
LT		 2779 struct rpc_message msg = {
2780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2781 .rpc_argp = &args,
3dda5e43 2782 .rpc_resp = &res,
1da177e4
LT		 2783 };
2784
cccef3b9 2785 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2786}
2787
2788static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2789{
2790 struct nfs4_exception exception = { };
2791 int err;
2792
2793 do {
2794 err = nfs4_handle_exception(server,
2795 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2796 &exception);
2797 } while (exception.retry);
2798 return err;
2799}
2800
2801static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2802{
0e574af1 2803 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2804 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2805}
2806
2807static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2808 struct nfs_pathconf *pathconf)
2809{
2810 struct nfs4_pathconf_arg args = {
2811 .fh = fhandle,
2812 .bitmask = server->attr_bitmask,
2813 };
d45b2989
BH		 2814 struct nfs4_pathconf_res res = {
2815 .pathconf = pathconf,
2816 };
1da177e4
LT		 2817 struct rpc_message msg = {
2818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2819 .rpc_argp = &args,
d45b2989 2820 .rpc_resp = &res,
1da177e4
LT		 2821 };
2822
2823 /* None of the pathconf attributes are mandatory to implement */
2824 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2825 memset(pathconf, 0, sizeof(*pathconf));
2826 return 0;
2827 }
2828
0e574af1 2829 nfs_fattr_init(pathconf->fattr);
cccef3b9 2830 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2831}
2832
2833static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2834 struct nfs_pathconf *pathconf)
2835{
2836 struct nfs4_exception exception = { };
2837 int err;
2838
2839 do {
2840 err = nfs4_handle_exception(server,
2841 _nfs4_proc_pathconf(server, fhandle, pathconf),
2842 &exception);
2843 } while (exception.retry);
2844 return err;
2845}
2846
ec06c096 2847static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2848{
ec06c096 2849 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2850
9e33bed5 2851 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2852 rpc_restart_call(task);
ec06c096 2853 return -EAGAIN;
1da177e4 2854 }
8850df99
TM		 2855
2856 nfs_invalidate_atime(data->inode);
1da177e4 2857 if (task->tk_status > 0)
ec06c096
TM		 2858 renew_lease(server, data->timestamp);
2859 return 0;
1da177e4
LT		 2860}
2861
bdc7f021 2862static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2863{
1da177e4 2864 data->timestamp = jiffies;
bdc7f021 2865 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2866}
2867
788e7a89 2868static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2869{
1da177e4
LT		 2870 struct inode *inode = data->inode;
2871
9e33bed5 2872 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2873 rpc_restart_call(task);
788e7a89 2874 return -EAGAIN;
1da177e4 2875 }
4f9838c7 2876 if (task->tk_status >= 0) {
1da177e4 2877 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2878 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2879 }
788e7a89 2880 return 0;
1da177e4
LT		 2881}
2882
bdc7f021 2883static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2884{
bdc7f021
TM		 2885 struct nfs_server *server = NFS_SERVER(data->inode);
2886
a65318bf 2887 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2888 data->res.server = server;
1da177e4
LT		 2889 data->timestamp = jiffies;
2890
bdc7f021 2891 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2892}
2893
788e7a89 2894static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2895{
1da177e4
LT		 2896 struct inode *inode = data->inode;
2897
9e33bed5 2898 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2899 rpc_restart_call(task);
788e7a89 2900 return -EAGAIN;
1da177e4 2901 }
9e08a3c5 2902 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2903 return 0;
1da177e4
LT		 2904}
2905
bdc7f021 2906static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2907{
788e7a89 2908 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2909
a65318bf 2910 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2911 data->res.server = server;
bdc7f021 2912 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2913}
2914
2915/*
2916 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2917 * standalone procedure for queueing an asynchronous RENEW.
2918 */
963d8fe5 2919static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2920{
adfa6f98 2921 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2922 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2923
2924 if (task->tk_status < 0) {
95baa25c
TM		 2925 /* Unless we're shutting down, schedule state recovery! */
2926 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2927 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2928 return;
2929 }
2930 spin_lock(&clp->cl_lock);
2931 if (time_before(clp->cl_last_renewal,timestamp))
2932 clp->cl_last_renewal = timestamp;
2933 spin_unlock(&clp->cl_lock);
2934}
2935
963d8fe5
TM		 2936static const struct rpc_call_ops nfs4_renew_ops = {
2937 .rpc_call_done = nfs4_renew_done,
2938};
2939
adfa6f98 2940int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2941{
2942 struct rpc_message msg = {
2943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2944 .rpc_argp = clp,
b4454fe1 2945 .rpc_cred = cred,
1da177e4
LT		 2946 };
2947
2948 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2949 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2950}
2951
adfa6f98 2952int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2953{
2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2956 .rpc_argp = clp,
b4454fe1 2957 .rpc_cred = cred,
1da177e4
LT		 2958 };
2959 unsigned long now = jiffies;
2960 int status;
2961
2962 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2963 if (status < 0)
2964 return status;
2965 spin_lock(&clp->cl_lock);
2966 if (time_before(clp->cl_last_renewal,now))
2967 clp->cl_last_renewal = now;
2968 spin_unlock(&clp->cl_lock);
2969 return 0;
2970}
2971
aa1870af
BF		 2972static inline int nfs4_server_supports_acls(struct nfs_server *server)
2973{
2974 return (server->caps & NFS_CAP_ACLS)
2975 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2976 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2977}
2978
2979/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2980 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2981 * the stack.
2982 */
2983#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2984
2985static void buf_to_pages(const void *buf, size_t buflen,
2986 struct page **pages, unsigned int *pgbase)
2987{
2988 const void *p = buf;
2989
2990 *pgbase = offset_in_page(buf);
2991 p -= *pgbase;
2992 while (p < buf + buflen) {
2993 *(pages++) = virt_to_page(p);
2994 p += PAGE_CACHE_SIZE;
2995 }
2996}
2997
e50a1c2e
BF		 2998struct nfs4_cached_acl {
2999 int cached;
3000 size_t len;
3e9d4154 3001 char data[0];
e50a1c2e
BF		 3002};
3003
3004static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3005{
3006 struct nfs_inode *nfsi = NFS_I(inode);
3007
3008 spin_lock(&inode->i_lock);
3009 kfree(nfsi->nfs4_acl);
3010 nfsi->nfs4_acl = acl;
3011 spin_unlock(&inode->i_lock);
3012}
3013
3014static void nfs4_zap_acl_attr(struct inode *inode)
3015{
3016 nfs4_set_cached_acl(inode, NULL);
3017}
3018
3019static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3020{
3021 struct nfs_inode *nfsi = NFS_I(inode);
3022 struct nfs4_cached_acl *acl;
3023 int ret = -ENOENT;
3024
3025 spin_lock(&inode->i_lock);
3026 acl = nfsi->nfs4_acl;
3027 if (acl == NULL)
3028 goto out;
3029 if (buf == NULL) /* user is just asking for length */
3030 goto out_len;
3031 if (acl->cached == 0)
3032 goto out;
3033 ret = -ERANGE; /* see getxattr(2) man page */
3034 if (acl->len > buflen)
3035 goto out;
3036 memcpy(buf, acl->data, acl->len);
3037out_len:
3038 ret = acl->len;
3039out:
3040 spin_unlock(&inode->i_lock);
3041 return ret;
3042}
3043
3044static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3045{
3046 struct nfs4_cached_acl *acl;
3047
3048 if (buf && acl_len <= PAGE_SIZE) {
3049 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3050 if (acl == NULL)
3051 goto out;
3052 acl->cached = 1;
3053 memcpy(acl->data, buf, acl_len);
3054 } else {
3055 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3056 if (acl == NULL)
3057 goto out;
3058 acl->cached = 0;
3059 }
3060 acl->len = acl_len;
3061out:
3062 nfs4_set_cached_acl(inode, acl);
3063}
3064
16b4289c 3065static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3066{
aa1870af
BF		 3067 struct page *pages[NFS4ACL_MAXPAGES];
3068 struct nfs_getaclargs args = {
3069 .fh = NFS_FH(inode),
3070 .acl_pages = pages,
3071 .acl_len = buflen,
3072 };
663c79b3
BH		 3073 struct nfs_getaclres res = {
3074 .acl_len = buflen,
3075 };
e50a1c2e 3076 void *resp_buf;
aa1870af
BF		 3077 struct rpc_message msg = {
3078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3079 .rpc_argp = &args,
663c79b3 3080 .rpc_resp = &res,
aa1870af 3081 };
e50a1c2e 3082 struct page *localpage = NULL;
aa1870af
BF		 3083 int ret;
3084
e50a1c2e
BF		 3085 if (buflen < PAGE_SIZE) {
3086 /* As long as we're doing a round trip to the server anyway,
3087 * let's be prepared for a page of acl data. */
3088 localpage = alloc_page(GFP_KERNEL);
3089 resp_buf = page_address(localpage);
3090 if (localpage == NULL)
3091 return -ENOMEM;
3092 args.acl_pages[0] = localpage;
3093 args.acl_pgbase = 0;
663c79b3 3094 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3095 } else {
3096 resp_buf = buf;
3097 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3098 }
cccef3b9 3099 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3100 if (ret)
3101 goto out_free;
663c79b3
BH		 3102 if (res.acl_len > args.acl_len)
3103 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3104 else
663c79b3 3105 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3106 if (buf) {
3107 ret = -ERANGE;
663c79b3 3108 if (res.acl_len > buflen)
e50a1c2e
BF		 3109 goto out_free;
3110 if (localpage)
663c79b3 3111 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3112 }
663c79b3 3113 ret = res.acl_len;
e50a1c2e
BF		 3114out_free:
3115 if (localpage)
3116 __free_page(localpage);
aa1870af
BF		 3117 return ret;
3118}
3119
16b4289c
TM		 3120static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3121{
3122 struct nfs4_exception exception = { };
3123 ssize_t ret;
3124 do {
3125 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3126 if (ret >= 0)
3127 break;
3128 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3129 } while (exception.retry);
3130 return ret;
3131}
3132
e50a1c2e
BF		 3133static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3134{
3135 struct nfs_server *server = NFS_SERVER(inode);
3136 int ret;
3137
3138 if (!nfs4_server_supports_acls(server))
3139 return -EOPNOTSUPP;
3140 ret = nfs_revalidate_inode(server, inode);
3141 if (ret < 0)
3142 return ret;
f41f7418
TM		 3143 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3144 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3145 ret = nfs4_read_cached_acl(inode, buf, buflen);
3146 if (ret != -ENOENT)
3147 return ret;
3148 return nfs4_get_acl_uncached(inode, buf, buflen);
3149}
3150
16b4289c 3151static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3152{
3153 struct nfs_server *server = NFS_SERVER(inode);
3154 struct page *pages[NFS4ACL_MAXPAGES];
3155 struct nfs_setaclargs arg = {
3156 .fh = NFS_FH(inode),
3157 .acl_pages = pages,
3158 .acl_len = buflen,
3159 };
73c403a9 3160 struct nfs_setaclres res;
4b580ee3
BF		 3161 struct rpc_message msg = {
3162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3163 .rpc_argp = &arg,
73c403a9 3164 .rpc_resp = &res,
4b580ee3
BF		 3165 };
3166 int ret;
3167
3168 if (!nfs4_server_supports_acls(server))
3169 return -EOPNOTSUPP;
642ac549 3170 nfs_inode_return_delegation(inode);
4b580ee3 3171 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3172 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3173 nfs_access_zap_cache(inode);
3174 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3175 return ret;
3176}
3177
16b4289c
TM		 3178static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3179{
3180 struct nfs4_exception exception = { };
3181 int err;
3182 do {
3183 err = nfs4_handle_exception(NFS_SERVER(inode),
3184 __nfs4_proc_set_acl(inode, buf, buflen),
3185 &exception);
3186 } while (exception.retry);
3187 return err;
3188}
3189
1da177e4 3190static int
9e33bed5 3191nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3192{
7539bbab 3193 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 3194
3195 if (!clp || task->tk_status >= 0)
3196 return 0;
3197 switch(task->tk_status) {
9e33bed5
TM		 3198 case -NFS4ERR_ADMIN_REVOKED:
3199 case -NFS4ERR_BAD_STATEID:
3200 case -NFS4ERR_OPENMODE:
3201 if (state == NULL)
3202 break;
3203 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3204 case -NFS4ERR_STALE_CLIENTID:
3205 case -NFS4ERR_STALE_STATEID:
3206 case -NFS4ERR_EXPIRED:
5d00837b 3207 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3208 nfs4_schedule_state_recovery(clp);
e005e804 3209 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3210 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3211 task->tk_status = 0;
3212 return -EAGAIN;
1da177e4 3213 case -NFS4ERR_DELAY:
2e96d286 3214 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3215 case -NFS4ERR_GRACE:
1da177e4
LT		 3216 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3217 task->tk_status = 0;
3218 return -EAGAIN;
3219 case -NFS4ERR_OLD_STATEID:
3220 task->tk_status = 0;
3221 return -EAGAIN;
3222 }
3223 task->tk_status = nfs4_map_errors(task->tk_status);
3224 return 0;
3225}
3226
adfa6f98 3227int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3228{
3229 nfs4_verifier sc_verifier;
3230 struct nfs4_setclientid setclientid = {
3231 .sc_verifier = &sc_verifier,
3232 .sc_prog = program,
3233 };
3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3236 .rpc_argp = &setclientid,
3237 .rpc_resp = clp,
286d7d6a 3238 .rpc_cred = cred,
1da177e4 3239 };
bc4785cd 3240 __be32 *p;
1da177e4
LT		 3241 int loop = 0;
3242 int status;
3243
bc4785cd 3244 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3245 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3246 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3247
3248 for(;;) {
3249 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3250 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3251 clp->cl_ipaddr,
3252 rpc_peeraddr2str(clp->cl_rpcclient,
3253 RPC_DISPLAY_ADDR),
69dd716c
TM		 3254 rpc_peeraddr2str(clp->cl_rpcclient,
3255 RPC_DISPLAY_PROTO),
78ea323b 3256 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3257 clp->cl_id_uniquifier);
3258 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3259 sizeof(setclientid.sc_netid),
3260 rpc_peeraddr2str(clp->cl_rpcclient,
3261 RPC_DISPLAY_NETID));
1da177e4 3262 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3263 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3264 clp->cl_ipaddr, port >> 8, port & 255);
3265
3266 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3267 if (status != -NFS4ERR_CLID_INUSE)
3268 break;
3269 if (signalled())
3270 break;
3271 if (loop++ & 1)
3272 ssleep(clp->cl_lease_time + 1);
3273 else
3274 if (++clp->cl_id_uniquifier == 0)
3275 break;
3276 }
3277 return status;
3278}
3279
adfa6f98 3280static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3281{
3282 struct nfs_fsinfo fsinfo;
3283 struct rpc_message msg = {
3284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3285 .rpc_argp = clp,
3286 .rpc_resp = &fsinfo,
286d7d6a 3287 .rpc_cred = cred,
1da177e4
LT		 3288 };
3289 unsigned long now;
3290 int status;
3291
3292 now = jiffies;
3293 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3294 if (status == 0) {
3295 spin_lock(&clp->cl_lock);
3296 clp->cl_lease_time = fsinfo.lease_time * HZ;
3297 clp->cl_last_renewal = now;
3298 spin_unlock(&clp->cl_lock);
3299 }
3300 return status;
3301}
3302
adfa6f98 3303int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3304{
77e03677 3305 long timeout = 0;
51581f3b
TM		 3306 int err;
3307 do {
3308 err = _nfs4_proc_setclientid_confirm(clp, cred);
3309 switch (err) {
3310 case 0:
3311 return err;
3312 case -NFS4ERR_RESOURCE:
3313 /* The IBM lawyers misread another document! */
3314 case -NFS4ERR_DELAY:
3315 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3316 }
3317 } while (err == 0);
3318 return err;
3319}
3320
fe650407
TM		 3321struct nfs4_delegreturndata {
3322 struct nfs4_delegreturnargs args;
fa178f29 3323 struct nfs4_delegreturnres res;
fe650407
TM		 3324 struct nfs_fh fh;
3325 nfs4_stateid stateid;
26e976a8 3326 unsigned long timestamp;
fa178f29 3327 struct nfs_fattr fattr;
fe650407
TM		 3328 int rpc_status;
3329};
3330
fe650407
TM		 3331static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3332{
3333 struct nfs4_delegreturndata *data = calldata;
3334 data->rpc_status = task->tk_status;
26e976a8 3335 if (data->rpc_status == 0)
fa178f29 3336 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3337}
3338
3339static void nfs4_delegreturn_release(void *calldata)
3340{
fe650407
TM		 3341 kfree(calldata);
3342}
3343
c8d149f3 3344static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3345 .rpc_call_done = nfs4_delegreturn_done,
3346 .rpc_release = nfs4_delegreturn_release,
3347};
3348
e6f81075 3349static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3350{
3351 struct nfs4_delegreturndata *data;
fa178f29 3352 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3353 struct rpc_task *task;
5138fde0
TM		 3354 struct rpc_message msg = {
3355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3356 .rpc_cred = cred,
3357 };
c970aa85
TM		 3358 struct rpc_task_setup task_setup_data = {
3359 .rpc_client = server->client,
5138fde0 3360 .rpc_message = &msg,
c970aa85
TM		 3361 .callback_ops = &nfs4_delegreturn_ops,
3362 .flags = RPC_TASK_ASYNC,
3363 };
e6f81075 3364 int status = 0;
fe650407
TM		 3365
3366 data = kmalloc(sizeof(*data), GFP_KERNEL);
3367 if (data == NULL)
3368 return -ENOMEM;
3369 data->args.fhandle = &data->fh;
3370 data->args.stateid = &data->stateid;
fa178f29 3371 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3372 nfs_copy_fh(&data->fh, NFS_FH(inode));
3373 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3374 data->res.fattr = &data->fattr;
3375 data->res.server = server;
5f7dbd5c 3376 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3377 nfs_fattr_init(data->res.fattr);
26e976a8 3378 data->timestamp = jiffies;
fe650407
TM		 3379 data->rpc_status = 0;
3380
c970aa85 3381 task_setup_data.callback_data = data;
5138fde0
TM		 3382 msg.rpc_argp = &data->args,
3383 msg.rpc_resp = &data->res,
c970aa85 3384 task = rpc_run_task(&task_setup_data);
7a1218a2 3385 if (IS_ERR(task))
fe650407 3386 return PTR_ERR(task);
e6f81075
TM		 3387 if (!issync)
3388 goto out;
fe650407 3389 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3390 if (status != 0)
3391 goto out;
3392 status = data->rpc_status;
3393 if (status != 0)
3394 goto out;
3395 nfs_refresh_inode(inode, &data->fattr);
3396out:
e6b3c4db 3397 rpc_put_task(task);
fe650407 3398 return status;
1da177e4
LT		 3399}
3400
e6f81075 3401int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3402{
3403 struct nfs_server *server = NFS_SERVER(inode);
3404 struct nfs4_exception exception = { };
3405 int err;
3406 do {
e6f81075 3407 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3408 switch (err) {
3409 case -NFS4ERR_STALE_STATEID:
3410 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3411 case 0:
3412 return 0;
3413 }
3414 err = nfs4_handle_exception(server, err, &exception);
3415 } while (exception.retry);
3416 return err;
3417}
3418
3419#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3420#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3421
3422/*
3423 * sleep, with exponential backoff, and retry the LOCK operation.
3424 */
3425static unsigned long
3426nfs4_set_lock_task_retry(unsigned long timeout)
3427{
150030b7 3428 schedule_timeout_killable(timeout);
1da177e4
LT		 3429 timeout <<= 1;
3430 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3431 return NFS4_LOCK_MAXTIMEOUT;
3432 return timeout;
3433}
3434
1da177e4
LT		 3435static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3436{
3437 struct inode *inode = state->inode;
3438 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3439 struct nfs_client *clp = server->nfs_client;
911d1aaf 3440 struct nfs_lockt_args arg = {
1da177e4 3441 .fh = NFS_FH(inode),
911d1aaf 3442 .fl = request,
1da177e4 3443 };
911d1aaf
TM		 3444 struct nfs_lockt_res res = {
3445 .denied = request,
1da177e4
LT		 3446 };
3447 struct rpc_message msg = {
3448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3449 .rpc_argp = &arg,
3450 .rpc_resp = &res,
3451 .rpc_cred = state->owner->so_cred,
3452 };
1da177e4
LT		 3453 struct nfs4_lock_state *lsp;
3454 int status;
3455
911d1aaf 3456 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3457 status = nfs4_set_lock_state(state, request);
3458 if (status != 0)
3459 goto out;
3460 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3461 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3462 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3463 switch (status) {
3464 case 0:
3465 request->fl_type = F_UNLCK;
3466 break;
3467 case -NFS4ERR_DENIED:
3468 status = 0;
1da177e4 3469 }
70cc6487 3470 request->fl_ops->fl_release_private(request);
8d0a8a9d 3471out:
1da177e4
LT		 3472 return status;
3473}
3474
3475static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3476{
3477 struct nfs4_exception exception = { };
3478 int err;
3479
3480 do {
3481 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3482 _nfs4_proc_getlk(state, cmd, request),
3483 &exception);
3484 } while (exception.retry);
3485 return err;
3486}
3487
3488static int do_vfs_lock(struct file *file, struct file_lock *fl)
3489{
3490 int res = 0;
3491 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3492 case FL_POSIX:
3493 res = posix_lock_file_wait(file, fl);
3494 break;
3495 case FL_FLOCK:
3496 res = flock_lock_file_wait(file, fl);
3497 break;
3498 default:
3499 BUG();
3500 }
1da177e4
LT		 3501 return res;
3502}
3503
faf5f49c 3504struct nfs4_unlockdata {
911d1aaf
TM		 3505 struct nfs_locku_args arg;
3506 struct nfs_locku_res res;
faf5f49c
TM		 3507 struct nfs4_lock_state *lsp;
3508 struct nfs_open_context *ctx;
911d1aaf
TM		 3509 struct file_lock fl;
3510 const struct nfs_server *server;
26e976a8 3511 unsigned long timestamp;
faf5f49c
TM		 3512};
3513
911d1aaf
TM		 3514static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3515 struct nfs_open_context *ctx,
3516 struct nfs4_lock_state *lsp,
3517 struct nfs_seqid *seqid)
3518{
3519 struct nfs4_unlockdata *p;
3520 struct inode *inode = lsp->ls_state->inode;
3521
3522 p = kmalloc(sizeof(*p), GFP_KERNEL);
3523 if (p == NULL)
3524 return NULL;
3525 p->arg.fh = NFS_FH(inode);
3526 p->arg.fl = &p->fl;
3527 p->arg.seqid = seqid;
c1d51931 3528 p->res.seqid = seqid;
5f7dbd5c 3529 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3530 p->arg.stateid = &lsp->ls_stateid;
3531 p->lsp = lsp;
3532 atomic_inc(&lsp->ls_count);
3533 /* Ensure we don't close file until we're done freeing locks! */
3534 p->ctx = get_nfs_open_context(ctx);
3535 memcpy(&p->fl, fl, sizeof(p->fl));
3536 p->server = NFS_SERVER(inode);
3537 return p;
3538}
3539
06f814a3 3540static void nfs4_locku_release_calldata(void *data)
faf5f49c 3541{
963d8fe5 3542 struct nfs4_unlockdata *calldata = data;
911d1aaf 3543 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3544 nfs4_put_lock_state(calldata->lsp);
3545 put_nfs_open_context(calldata->ctx);
3546 kfree(calldata);
faf5f49c
TM		 3547}
3548
963d8fe5 3549static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3550{
963d8fe5 3551 struct nfs4_unlockdata *calldata = data;
faf5f49c 3552
06f814a3
TM		 3553 if (RPC_ASSASSINATED(task))
3554 return;
faf5f49c
TM		 3555 switch (task->tk_status) {
3556 case 0:
3557 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3558 calldata->res.stateid.data,
faf5f49c 3559 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3560 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3561 break;
9e33bed5
TM		 3562 case -NFS4ERR_BAD_STATEID:
3563 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3564 case -NFS4ERR_STALE_STATEID:
3565 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3566 break;
3567 default:
9e33bed5 3568 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3569 rpc_restart_call(task);
faf5f49c 3570 }
faf5f49c
TM		 3571}
3572
4ce70ada 3573static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3574{
4ce70ada 3575 struct nfs4_unlockdata *calldata = data;
faf5f49c 3576
911d1aaf 3577 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3578 return;
3579 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3580 /* Note: exit _without_ running nfs4_locku_done */
3581 task->tk_action = NULL;
faf5f49c
TM		 3582 return;
3583 }
26e976a8 3584 calldata->timestamp = jiffies;
5138fde0 3585 rpc_call_start(task);
faf5f49c
TM		 3586}
3587
963d8fe5 3588static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3589 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3590 .rpc_call_done = nfs4_locku_done,
06f814a3 3591 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3592};
3593
a5d16a4d
TM		 3594static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3595 struct nfs_open_context *ctx,
3596 struct nfs4_lock_state *lsp,
3597 struct nfs_seqid *seqid)
3598{
3599 struct nfs4_unlockdata *data;
5138fde0
TM		 3600 struct rpc_message msg = {
3601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3602 .rpc_cred = ctx->cred,
3603 };
c970aa85
TM		 3604 struct rpc_task_setup task_setup_data = {
3605 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3606 .rpc_message = &msg,
c970aa85 3607 .callback_ops = &nfs4_locku_ops,
101070ca 3608 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3609 .flags = RPC_TASK_ASYNC,
3610 };
a5d16a4d 3611
137d6aca
FF		 3612 /* Ensure this is an unlock - when canceling a lock, the
3613 * canceled lock is passed in, and it won't be an unlock.
3614 */
3615 fl->fl_type = F_UNLCK;
3616
a5d16a4d
TM		 3617 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3618 if (data == NULL) {
3619 nfs_free_seqid(seqid);
3620 return ERR_PTR(-ENOMEM);
3621 }
3622
5138fde0
TM		 3623 msg.rpc_argp = &data->arg,
3624 msg.rpc_resp = &data->res,
c970aa85
TM		 3625 task_setup_data.callback_data = data;
3626 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3627}
3628
faf5f49c
TM		 3629static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3630{
19e03c57 3631 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3632 struct nfs_seqid *seqid;
1da177e4 3633 struct nfs4_lock_state *lsp;
06f814a3
TM		 3634 struct rpc_task *task;
3635 int status = 0;
536ff0f8 3636 unsigned char fl_flags = request->fl_flags;
faf5f49c 3637
8d0a8a9d 3638 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3639 /* Unlock _before_ we do the RPC call */
3640 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3641 down_read(&nfsi->rwsem);
3642 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3643 up_read(&nfsi->rwsem);
9b073574 3644 goto out;
19e03c57
TM		 3645 }
3646 up_read(&nfsi->rwsem);
8d0a8a9d 3647 if (status != 0)
9b073574
TM		 3648 goto out;
3649 /* Is this a delegated lock? */
3650 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3651 goto out;
8d0a8a9d 3652 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3653 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3654 status = -ENOMEM;
911d1aaf 3655 if (seqid == NULL)
9b073574 3656 goto out;
cd3758e3 3657 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3658 status = PTR_ERR(task);
3659 if (IS_ERR(task))
9b073574 3660 goto out;
a5d16a4d 3661 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3662 rpc_put_task(task);
9b073574 3663out:
536ff0f8 3664 request->fl_flags = fl_flags;
1da177e4
LT		 3665 return status;
3666}
3667
a5d16a4d
TM		 3668struct nfs4_lockdata {
3669 struct nfs_lock_args arg;
3670 struct nfs_lock_res res;
3671 struct nfs4_lock_state *lsp;
3672 struct nfs_open_context *ctx;
3673 struct file_lock fl;
26e976a8 3674 unsigned long timestamp;
a5d16a4d
TM		 3675 int rpc_status;
3676 int cancelled;
3677};
3678
3679static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3680 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3681{
a5d16a4d
TM		 3682 struct nfs4_lockdata *p;
3683 struct inode *inode = lsp->ls_state->inode;
1da177e4 3684 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3685
3686 p = kzalloc(sizeof(*p), GFP_KERNEL);
3687 if (p == NULL)
3688 return NULL;
3689
3690 p->arg.fh = NFS_FH(inode);
3691 p->arg.fl = &p->fl;
2f74c0a0
TM		 3692 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3693 if (p->arg.open_seqid == NULL)
3694 goto out_free;
a5d16a4d
TM		 3695 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3696 if (p->arg.lock_seqid == NULL)
2f74c0a0 3697 goto out_free_seqid;
a5d16a4d 3698 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3699 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3700 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3701 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3702 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d
TM		 3703 p->lsp = lsp;
3704 atomic_inc(&lsp->ls_count);
3705 p->ctx = get_nfs_open_context(ctx);
3706 memcpy(&p->fl, fl, sizeof(p->fl));
3707 return p;
2f74c0a0
TM		 3708out_free_seqid:
3709 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3710out_free:
3711 kfree(p);
3712 return NULL;
3713}
3714
3715static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3716{
3717 struct nfs4_lockdata *data = calldata;
3718 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3719
3110ff80 3720 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3721 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3722 return;
a5d16a4d
TM		 3723 /* Do we need to do an open_to_lock_owner? */
3724 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3725 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3726 return;
a5d16a4d
TM		 3727 data->arg.open_stateid = &state->stateid;
3728 data->arg.new_lock_owner = 1;
c1d51931 3729 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3730 } else
3731 data->arg.new_lock_owner = 0;
26e976a8 3732 data->timestamp = jiffies;
5138fde0 3733 rpc_call_start(task);
3110ff80 3734 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3735}
3736
3737static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3738{
3739 struct nfs4_lockdata *data = calldata;
3740
3110ff80 3741 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3742
3743 data->rpc_status = task->tk_status;
3744 if (RPC_ASSASSINATED(task))
3745 goto out;
3746 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3747 if (data->rpc_status == 0)
3748 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3749 else
3750 goto out;
3751 }
3752 if (data->rpc_status == 0) {
3753 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3754 sizeof(data->lsp->ls_stateid.data));
3755 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3756 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3757 }
a5d16a4d 3758out:
3110ff80 3759 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3760}
3761
3762static void nfs4_lock_release(void *calldata)
3763{
3764 struct nfs4_lockdata *data = calldata;
3765
3110ff80 3766 dprintk("%s: begin!\n", __func__);
2f74c0a0 3767 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3768 if (data->cancelled != 0) {
3769 struct rpc_task *task;
3770 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3771 data->arg.lock_seqid);
3772 if (!IS_ERR(task))
e6b3c4db 3773 rpc_put_task(task);
3110ff80 3774 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3775 } else
3776 nfs_free_seqid(data->arg.lock_seqid);
3777 nfs4_put_lock_state(data->lsp);
3778 put_nfs_open_context(data->ctx);
3779 kfree(data);
3110ff80 3780 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3781}
3782
3783static const struct rpc_call_ops nfs4_lock_ops = {
3784 .rpc_call_prepare = nfs4_lock_prepare,
3785 .rpc_call_done = nfs4_lock_done,
3786 .rpc_release = nfs4_lock_release,
3787};
3788
3789static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3790{
3791 struct nfs4_lockdata *data;
3792 struct rpc_task *task;
5138fde0
TM		 3793 struct rpc_message msg = {
3794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3795 .rpc_cred = state->owner->so_cred,
3796 };
c970aa85
TM		 3797 struct rpc_task_setup task_setup_data = {
3798 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3799 .rpc_message = &msg,
c970aa85 3800 .callback_ops = &nfs4_lock_ops,
101070ca 3801 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3802 .flags = RPC_TASK_ASYNC,
3803 };
a5d16a4d
TM		 3804 int ret;
3805
3110ff80 3806 dprintk("%s: begin!\n", __func__);
cd3758e3 3807 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3808 fl->fl_u.nfs4_fl.owner);
3809 if (data == NULL)
3810 return -ENOMEM;
3811 if (IS_SETLKW(cmd))
3812 data->arg.block = 1;
3813 if (reclaim != 0)
3814 data->arg.reclaim = 1;
5138fde0
TM		 3815 msg.rpc_argp = &data->arg,
3816 msg.rpc_resp = &data->res,
c970aa85
TM		 3817 task_setup_data.callback_data = data;
3818 task = rpc_run_task(&task_setup_data);
7a1218a2 3819 if (IS_ERR(task))
a5d16a4d 3820 return PTR_ERR(task);
a5d16a4d
TM		 3821 ret = nfs4_wait_for_completion_rpc_task(task);
3822 if (ret == 0) {
3823 ret = data->rpc_status;
3824 if (ret == -NFS4ERR_DENIED)
3825 ret = -EAGAIN;
3826 } else
3827 data->cancelled = 1;
e6b3c4db 3828 rpc_put_task(task);
3110ff80 3829 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3830 return ret;
1da177e4
LT		 3831}
3832
3833static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3834{
202b50dc
TM		 3835 struct nfs_server *server = NFS_SERVER(state->inode);
3836 struct nfs4_exception exception = { };
3837 int err;
3838
3839 do {
42a2d13e
TM		 3840 /* Cache the lock if possible... */
3841 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3842 return 0;
202b50dc
TM		 3843 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3844 if (err != -NFS4ERR_DELAY)
3845 break;
3846 nfs4_handle_exception(server, err, &exception);
3847 } while (exception.retry);
3848 return err;
1da177e4
LT		 3849}
3850
3851static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3852{
202b50dc
TM		 3853 struct nfs_server *server = NFS_SERVER(state->inode);
3854 struct nfs4_exception exception = { };
3855 int err;
3856
6bfc93ef
TM		 3857 err = nfs4_set_lock_state(state, request);
3858 if (err != 0)
3859 return err;
202b50dc 3860 do {
42a2d13e
TM		 3861 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3862 return 0;
202b50dc
TM		 3863 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3864 if (err != -NFS4ERR_DELAY)
3865 break;
3866 nfs4_handle_exception(server, err, &exception);
3867 } while (exception.retry);
3868 return err;
1da177e4
LT		 3869}
3870
3871static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3872{
19e03c57 3873 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3874 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3875 int status;
3876
6bfc93ef 3877 /* Is this a delegated open? */
6bfc93ef
TM		 3878 status = nfs4_set_lock_state(state, request);
3879 if (status != 0)
3880 goto out;
01c3b861
TM		 3881 request->fl_flags |= FL_ACCESS;
3882 status = do_vfs_lock(request->fl_file, request);
3883 if (status < 0)
3884 goto out;
19e03c57 3885 down_read(&nfsi->rwsem);
01c3b861 3886 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3887 /* Yes: cache locks! */
01c3b861 3888 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3889 request->fl_flags = fl_flags & ~FL_SLEEP;
3890 status = do_vfs_lock(request->fl_file, request);
3891 goto out_unlock;
01c3b861 3892 }
6bfc93ef
TM		 3893 status = _nfs4_do_setlk(state, cmd, request, 0);
3894 if (status != 0)
01c3b861 3895 goto out_unlock;
6bfc93ef 3896 /* Note: we always want to sleep here! */
01c3b861 3897 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3898 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3899 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3900out_unlock:
19e03c57 3901 up_read(&nfsi->rwsem);
01c3b861
TM		 3902out:
3903 request->fl_flags = fl_flags;
1da177e4
LT		 3904 return status;
3905}
3906
3907static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3908{
3909 struct nfs4_exception exception = { };
3910 int err;
3911
3912 do {
3913 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3914 _nfs4_proc_setlk(state, cmd, request),
3915 &exception);
3916 } while (exception.retry);
3917 return err;
3918}
3919
3920static int
3921nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3922{
3923 struct nfs_open_context *ctx;
3924 struct nfs4_state *state;
3925 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3926 int status;
3927
3928 /* verify open state */
cd3758e3 3929 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3930 state = ctx->state;
3931
3932 if (request->fl_start < 0 || request->fl_end < 0)
3933 return -EINVAL;
3934
3935 if (IS_GETLK(cmd))
3936 return nfs4_proc_getlk(state, F_GETLK, request);
3937
3938 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3939 return -EINVAL;
3940
3941 if (request->fl_type == F_UNLCK)
3942 return nfs4_proc_unlck(state, cmd, request);
3943
3944 do {
3945 status = nfs4_proc_setlk(state, cmd, request);
3946 if ((status != -EAGAIN) || IS_SETLK(cmd))
3947 break;
3948 timeout = nfs4_set_lock_task_retry(timeout);
3949 status = -ERESTARTSYS;
3950 if (signalled())
3951 break;
3952 } while(status < 0);
1da177e4
LT		 3953 return status;
3954}
3955
888e694c
TM		 3956int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3957{
3958 struct nfs_server *server = NFS_SERVER(state->inode);
3959 struct nfs4_exception exception = { };
3960 int err;
3961
3962 err = nfs4_set_lock_state(state, fl);
3963 if (err != 0)
3964 goto out;
3965 do {
3966 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3967 if (err != -NFS4ERR_DELAY)
3968 break;
3969 err = nfs4_handle_exception(server, err, &exception);
3970 } while (exception.retry);
3971out:
3972 return err;
3973}
6b3b5496 3974
aa1870af
BF		 3975#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3976
6b3b5496
BF		 3977int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3978 size_t buflen, int flags)
3979{
4b580ee3
BF		 3980 struct inode *inode = dentry->d_inode;
3981
3982 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3983 return -EOPNOTSUPP;
3984
4b580ee3 3985 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3986}
3987
3988/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3989 * and that's what we'll do for e.g. user attributes that haven't been set.
3990 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3991 * attributes in kernel-managed attribute namespaces. */
3992ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3993 size_t buflen)
3994{
aa1870af
BF		 3995 struct inode *inode = dentry->d_inode;
3996
3997 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3998 return -EOPNOTSUPP;
3999
4000 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4001}
4002
4003ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4004{
aa1870af 4005 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4006
096455a2
BF		 4007 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4008 return 0;
6b3b5496
BF		 4009 if (buf && buflen < len)
4010 return -ERANGE;
4011 if (buf)
aa1870af
BF		 4012 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4013 return len;
6b3b5496
BF		 4014}
4015
69aaaae1
TM		 4016static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4017{
4018 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4019 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4020 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4021 return;
4022
4023 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4024 NFS_ATTR_FATTR_NLINK;
4025 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4026 fattr->nlink = 2;
4027}
4028
56659e99 4029int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4030 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4031{
4032 struct nfs_server *server = NFS_SERVER(dir);
4033 u32 bitmask[2] = {
361e624f
MN		 4034 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4035 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4036 };
4037 struct nfs4_fs_locations_arg args = {
4038 .dir_fh = NFS_FH(dir),
c228fd3a 4039 .name = name,
683b57b4
TM		 4040 .page = page,
4041 .bitmask = bitmask,
4042 };
22958463
BH		 4043 struct nfs4_fs_locations_res res = {
4044 .fs_locations = fs_locations,
4045 };
683b57b4
TM		 4046 struct rpc_message msg = {
4047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4048 .rpc_argp = &args,
22958463 4049 .rpc_resp = &res,
683b57b4
TM		 4050 };
4051 int status;
4052
3110ff80 4053 dprintk("%s: start\n", __func__);
c228fd3a 4054 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4055 fs_locations->server = server;
830b8e33 4056 fs_locations->nlocations = 0;
cccef3b9 4057 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4058 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4059 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4060 return status;
4061}
4062
557134a3
AA		 4063#ifdef CONFIG_NFS_V4_1
4064/* Destroy the slot table */
4065static void nfs4_destroy_slot_table(struct nfs4_session *session)
4066{
4067 if (session->fc_slot_table.slots == NULL)
4068 return;
4069 kfree(session->fc_slot_table.slots);
4070 session->fc_slot_table.slots = NULL;
4071 return;
4072}
4073
4074struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4075{
4076 struct nfs4_session *session;
4077 struct nfs4_slot_table *tbl;
4078
4079 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4080 if (!session)
4081 return NULL;
4082 tbl = &session->fc_slot_table;
4083 spin_lock_init(&tbl->slot_tbl_lock);
4084 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4085 session->clp = clp;
4086 return session;
4087}
4088
4089void nfs4_destroy_session(struct nfs4_session *session)
4090{
4091 nfs4_destroy_slot_table(session);
4092 kfree(session);
4093}
4094
4095#endif /* CONFIG_NFS_V4_1 */
4096
1da177e4 4097struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 4098 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4099 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4100 .recover_open = nfs4_open_reclaim,
4101 .recover_lock = nfs4_lock_reclaim,
4102};
4103
b79a4a1b 4104struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 4105 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4106 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4107 .recover_open = nfs4_open_expired,
4108 .recover_lock = nfs4_lock_expired,
4109};
4110
92e1d5be 4111static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4112 .permission = nfs_permission,
4113 .getattr = nfs_getattr,
4114 .setattr = nfs_setattr,
4115 .getxattr = nfs4_getxattr,
4116 .setxattr = nfs4_setxattr,
4117 .listxattr = nfs4_listxattr,
4118};
4119
509de811 4120const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4121 .version = 4, /* protocol version */
4122 .dentry_ops = &nfs4_dentry_operations,
4123 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4124 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4125 .getroot = nfs4_proc_get_root,
4126 .getattr = nfs4_proc_getattr,
4127 .setattr = nfs4_proc_setattr,
2b3de441 4128 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4129 .lookup = nfs4_proc_lookup,
4130 .access = nfs4_proc_access,
4131 .readlink = nfs4_proc_readlink,
1da177e4
LT		 4132 .create = nfs4_proc_create,
4133 .remove = nfs4_proc_remove,
4134 .unlink_setup = nfs4_proc_unlink_setup,
4135 .unlink_done = nfs4_proc_unlink_done,
4136 .rename = nfs4_proc_rename,
4137 .link = nfs4_proc_link,
4138 .symlink = nfs4_proc_symlink,
4139 .mkdir = nfs4_proc_mkdir,
4140 .rmdir = nfs4_proc_remove,
4141 .readdir = nfs4_proc_readdir,
4142 .mknod = nfs4_proc_mknod,
4143 .statfs = nfs4_proc_statfs,
4144 .fsinfo = nfs4_proc_fsinfo,
4145 .pathconf = nfs4_proc_pathconf,
e9326dca 4146 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 4147 .decode_dirent = nfs4_decode_dirent,
4148 .read_setup = nfs4_proc_read_setup,
ec06c096 4149 .read_done = nfs4_read_done,
1da177e4 4150 .write_setup = nfs4_proc_write_setup,
788e7a89 4151 .write_done = nfs4_write_done,
1da177e4 4152 .commit_setup = nfs4_proc_commit_setup,
788e7a89 4153 .commit_done = nfs4_commit_done,
1da177e4 4154 .lock = nfs4_proc_lock,
e50a1c2e 4155 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 4156 .close_context = nfs4_close_context,
1da177e4
LT		 4157};
4158
4159/*
4160 * Local variables:
4161 * c-basic-offset: 8
4162 * End:
4163 */
Clone of davem's net-next-2.6 tree