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nfs41: use rpc prepare call state for session reset
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
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>
99fe60d0 51#include <linux/module.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
cdd4e68b 64struct nfs4_opendata;
864472e9 65static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 66static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 67static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 68static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 70
1da177e4 71/* Prevent leaks of NFSv4 errors into userland */
46f72f57 72static int nfs4_map_errors(int err)
1da177e4
LT		 73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 76 __func__, -err);
1da177e4
LT		 77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
65de872e
TM		 198static int nfs4_wait_clnt_recover(struct nfs_client *clp)
199{
200 int res;
201
202 might_sleep();
203
e005e804 204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 205 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 206 return res;
207}
208
209static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
210{
211 int res = 0;
212
213 might_sleep();
214
215 if (*timeout <= 0)
216 *timeout = NFS4_POLL_RETRY_MIN;
217 if (*timeout > NFS4_POLL_RETRY_MAX)
218 *timeout = NFS4_POLL_RETRY_MAX;
219 schedule_timeout_killable(*timeout);
220 if (fatal_signal_pending(current))
221 res = -ERESTARTSYS;
222 *timeout <<= 1;
223 return res;
224}
225
226/* This is the error handling routine for processes that are allowed
227 * to sleep.
228 */
229static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
230{
231 struct nfs_client *clp = server->nfs_client;
9e33bed5 232 struct nfs4_state *state = exception->state;
65de872e
TM		 233 int ret = errorcode;
234
235 exception->retry = 0;
236 switch(errorcode) {
237 case 0:
238 return 0;
9e33bed5
TM		 239 case -NFS4ERR_ADMIN_REVOKED:
240 case -NFS4ERR_BAD_STATEID:
241 case -NFS4ERR_OPENMODE:
242 if (state == NULL)
243 break;
244 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 245 case -NFS4ERR_STALE_CLIENTID:
246 case -NFS4ERR_STALE_STATEID:
247 case -NFS4ERR_EXPIRED:
248 nfs4_schedule_state_recovery(clp);
249 ret = nfs4_wait_clnt_recover(clp);
250 if (ret == 0)
251 exception->retry = 1;
252 break;
253 case -NFS4ERR_FILE_OPEN:
254 case -NFS4ERR_GRACE:
255 case -NFS4ERR_DELAY:
256 ret = nfs4_delay(server->client, &exception->timeout);
257 if (ret != 0)
258 break;
259 case -NFS4ERR_OLD_STATEID:
260 exception->retry = 1;
261 }
262 /* We failed to handle the error */
263 return nfs4_map_errors(ret);
264}
265
266
26e976a8 267static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 268{
7539bbab 269 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 270 spin_lock(&clp->cl_lock);
271 if (time_before(clp->cl_last_renewal,timestamp))
272 clp->cl_last_renewal = timestamp;
273 spin_unlock(&clp->cl_lock);
274}
275
cccef3b9
AA		 276#if defined(CONFIG_NFS_V4_1)
277
e2c4ab3c
AA		 278/*
279 * nfs4_free_slot - free a slot and efficiently update slot table.
280 *
281 * freeing a slot is trivially done by clearing its respective bit
282 * in the bitmap.
283 * If the freed slotid equals highest_used_slotid we want to update it
284 * so that the server would be able to size down the slot table if needed,
285 * otherwise we know that the highest_used_slotid is still in use.
286 * When updating highest_used_slotid there may be "holes" in the bitmap
287 * so we need to scan down from highest_used_slotid to 0 looking for the now
288 * highest slotid in use.
289 * If none found, highest_used_slotid is set to -1.
290 */
291static void
292nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
293{
294 int slotid = free_slotid;
295
296 spin_lock(&tbl->slot_tbl_lock);
297 /* clear used bit in bitmap */
298 __clear_bit(slotid, tbl->used_slots);
299
300 /* update highest_used_slotid when it is freed */
301 if (slotid == tbl->highest_used_slotid) {
302 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
303 if (slotid >= 0 && slotid < tbl->max_slots)
304 tbl->highest_used_slotid = slotid;
305 else
306 tbl->highest_used_slotid = -1;
307 }
308 rpc_wake_up_next(&tbl->slot_tbl_waitq);
309 spin_unlock(&tbl->slot_tbl_lock);
310 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
311 free_slotid, tbl->highest_used_slotid);
312}
313
13615871
AA		 314void nfs41_sequence_free_slot(const struct nfs_client *clp,
315 struct nfs4_sequence_res *res)
316{
317 struct nfs4_slot_table *tbl;
318
319 if (!nfs4_has_session(clp)) {
320 dprintk("%s: No session\n", __func__);
321 return;
322 }
323 tbl = &clp->cl_session->fc_slot_table;
324 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
325 dprintk("%s: No slot\n", __func__);
326 /* just wake up the next guy waiting since
327 * we may have not consumed a slot after all */
328 rpc_wake_up_next(&tbl->slot_tbl_waitq);
329 return;
330 }
331 nfs4_free_slot(tbl, res->sr_slotid);
332 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
333}
334
b0df806c
AA		 335static void nfs41_sequence_done(struct nfs_client *clp,
336 struct nfs4_sequence_res *res,
337 int rpc_status)
338{
339 unsigned long timestamp;
340 struct nfs4_slot_table *tbl;
341 struct nfs4_slot *slot;
342
343 /*
344 * sr_status remains 1 if an RPC level error occurred. The server
345 * may or may not have processed the sequence operation..
346 * Proceed as if the server received and processed the sequence
347 * operation.
348 */
349 if (res->sr_status == 1)
350 res->sr_status = NFS_OK;
351
352 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
353 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
354 goto out;
355
356 tbl = &clp->cl_session->fc_slot_table;
357 slot = tbl->slots + res->sr_slotid;
358
359 if (res->sr_status == 0) {
360 /* Update the slot's sequence and clientid lease timer */
361 ++slot->seq_nr;
362 timestamp = res->sr_renewal_time;
363 spin_lock(&clp->cl_lock);
364 if (time_before(clp->cl_last_renewal, timestamp))
365 clp->cl_last_renewal = timestamp;
366 spin_unlock(&clp->cl_lock);
367 return;
368 }
369out:
370 /* The session may be reset by one of the error handlers. */
371 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
372 nfs41_sequence_free_slot(clp, res);
373}
374
510b8175
BH		 375/*
376 * nfs4_find_slot - efficiently look for a free slot
377 *
378 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
379 * If found, we mark the slot as used, update the highest_used_slotid,
380 * and respectively set up the sequence operation args.
381 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 382 *
383 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 384 */
385static u8
386nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
387{
388 int slotid;
389 u8 ret_id = NFS4_MAX_SLOT_TABLE;
390 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
391
510b8175
BH		 392 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
393 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
394 tbl->max_slots);
395 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
396 if (slotid >= tbl->max_slots)
397 goto out;
398 __set_bit(slotid, tbl->used_slots);
399 if (slotid > tbl->highest_used_slotid)
400 tbl->highest_used_slotid = slotid;
401 ret_id = slotid;
402out:
403 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
404 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 405 return ret_id;
406}
407
ce5039c1
AA		 408static int nfs41_setup_sequence(struct nfs4_session *session,
409 struct nfs4_sequence_args *args,
410 struct nfs4_sequence_res *res,
411 int cache_reply,
412 struct rpc_task *task)
413{
fbcd4abc
AA		 414 struct nfs4_slot *slot;
415 struct nfs4_slot_table *tbl;
416 u8 slotid;
417
418 dprintk("--> %s\n", __func__);
ce5039c1
AA		 419 /* slot already allocated? */
420 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
421 return 0;
422
423 memset(res, 0, sizeof(*res));
424 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 425 tbl = &session->fc_slot_table;
426
427 spin_lock(&tbl->slot_tbl_lock);
428 slotid = nfs4_find_slot(tbl, task);
429 if (slotid == NFS4_MAX_SLOT_TABLE) {
430 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
431 spin_unlock(&tbl->slot_tbl_lock);
432 dprintk("<-- %s: no free slots\n", __func__);
433 return -EAGAIN;
434 }
435 spin_unlock(&tbl->slot_tbl_lock);
436
437 slot = tbl->slots + slotid;
99fe60d0 438 args->sa_session = session;
fbcd4abc
AA		 439 args->sa_slotid = slotid;
440 args->sa_cache_this = cache_reply;
441
442 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
443
99fe60d0 444 res->sr_session = session;
fbcd4abc
AA		 445 res->sr_slotid = slotid;
446 res->sr_renewal_time = jiffies;
447 /*
448 * sr_status is only set in decode_sequence, and so will remain
449 * set to 1 if an rpc level failure occurs.
450 */
451 res->sr_status = 1;
ce5039c1
AA		 452 return 0;
453}
454
455int nfs4_setup_sequence(struct nfs_client *clp,
456 struct nfs4_sequence_args *args,
457 struct nfs4_sequence_res *res,
458 int cache_reply,
459 struct rpc_task *task)
460{
461 int ret = 0;
462
463 dprintk("--> %s clp %p session %p sr_slotid %d\n",
464 __func__, clp, clp->cl_session, res->sr_slotid);
465
466 if (!nfs4_has_session(clp))
467 goto out;
468 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
469 task);
470 if (ret != -EAGAIN) {
471 /* terminate rpc task */
472 task->tk_status = ret;
473 task->tk_action = NULL;
474 }
475out:
476 dprintk("<-- %s status=%d\n", __func__, ret);
477 return ret;
478}
479
480struct nfs41_call_sync_data {
481 struct nfs_client *clp;
482 struct nfs4_sequence_args *seq_args;
483 struct nfs4_sequence_res *seq_res;
484 int cache_reply;
485};
486
487static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
488{
489 struct nfs41_call_sync_data *data = calldata;
490
491 dprintk("--> %s data->clp->cl_session %p\n", __func__,
492 data->clp->cl_session);
493 if (nfs4_setup_sequence(data->clp, data->seq_args,
494 data->seq_res, data->cache_reply, task))
495 return;
496 rpc_call_start(task);
497}
498
69ab40c4
AA		 499static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
500{
501 struct nfs41_call_sync_data *data = calldata;
502
503 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
504 nfs41_sequence_free_slot(data->clp, data->seq_res);
505}
506
ce5039c1
AA		 507struct rpc_call_ops nfs41_call_sync_ops = {
508 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 509 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 510};
511
512static int nfs4_call_sync_sequence(struct nfs_client *clp,
513 struct rpc_clnt *clnt,
514 struct rpc_message *msg,
515 struct nfs4_sequence_args *args,
516 struct nfs4_sequence_res *res,
517 int cache_reply)
518{
519 int ret;
520 struct rpc_task *task;
521 struct nfs41_call_sync_data data = {
522 .clp = clp,
523 .seq_args = args,
524 .seq_res = res,
525 .cache_reply = cache_reply,
526 };
527 struct rpc_task_setup task_setup = {
528 .rpc_client = clnt,
529 .rpc_message = msg,
530 .callback_ops = &nfs41_call_sync_ops,
531 .callback_data = &data
532 };
533
534 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
535 task = rpc_run_task(&task_setup);
536 if (IS_ERR(task))
537 ret = PTR_ERR(task);
538 else {
539 ret = task->tk_status;
540 rpc_put_task(task);
541 }
542 return ret;
543}
544
cccef3b9
AA		 545int _nfs4_call_sync_session(struct nfs_server *server,
546 struct rpc_message *msg,
547 struct nfs4_sequence_args *args,
548 struct nfs4_sequence_res *res,
549 int cache_reply)
550{
ce5039c1
AA		 551 return nfs4_call_sync_sequence(server->nfs_client, server->client,
552 msg, args, res, cache_reply);
cccef3b9
AA		 553}
554
555#endif /* CONFIG_NFS_V4_1 */
556
557int _nfs4_call_sync(struct nfs_server *server,
558 struct rpc_message *msg,
559 struct nfs4_sequence_args *args,
560 struct nfs4_sequence_res *res,
561 int cache_reply)
562{
f3752975 563 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 564 return rpc_call_sync(server->client, msg, 0);
565}
566
567#define nfs4_call_sync(server, msg, args, res, cache_reply) \
568 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
569 &(res)->seq_res, (cache_reply))
570
b0df806c
AA		 571static void nfs4_sequence_done(const struct nfs_server *server,
572 struct nfs4_sequence_res *res, int rpc_status)
573{
574#ifdef CONFIG_NFS_V4_1
575 if (nfs4_has_session(server->nfs_client))
576 nfs41_sequence_done(server->nfs_client, res, rpc_status);
577#endif /* CONFIG_NFS_V4_1 */
578}
579
580/* no restart, therefore free slot here */
581static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
582 struct nfs4_sequence_res *res,
583 int rpc_status)
584{
585 nfs4_sequence_done(server, res, rpc_status);
586 nfs4_sequence_free_slot(server->nfs_client, res);
587}
588
38478b24 589static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 590{
38478b24 591 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 592
38478b24 593 spin_lock(&dir->i_lock);
40d24704
TM		 594 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
595 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 596 nfs_force_lookup_revalidate(dir);
40d24704 597 nfsi->change_attr = cinfo->after;
38478b24 598 spin_unlock(&dir->i_lock);
1da177e4
LT		 599}
600
e56e0b78 601struct nfs4_opendata {
c6d00e63 602 struct kref kref;
e56e0b78
TM		 603 struct nfs_openargs o_arg;
604 struct nfs_openres o_res;
cdd4e68b
TM		 605 struct nfs_open_confirmargs c_arg;
606 struct nfs_open_confirmres c_res;
e56e0b78
TM		 607 struct nfs_fattr f_attr;
608 struct nfs_fattr dir_attr;
ad389da7 609 struct path path;
e56e0b78
TM		 610 struct dentry *dir;
611 struct nfs4_state_owner *owner;
aac00a8d 612 struct nfs4_state *state;
e56e0b78 613 struct iattr attrs;
26e976a8 614 unsigned long timestamp;
3e309914 615 unsigned int rpc_done : 1;
24ac23ab
TM		 616 int rpc_status;
617 int cancelled;
e56e0b78
TM		 618};
619
2ced46c2
TM		 620
621static void nfs4_init_opendata_res(struct nfs4_opendata *p)
622{
623 p->o_res.f_attr = &p->f_attr;
624 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 625 p->o_res.seqid = p->o_arg.seqid;
626 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 627 p->o_res.server = p->o_arg.server;
628 nfs_fattr_init(&p->f_attr);
629 nfs_fattr_init(&p->dir_attr);
630}
631
ad389da7 632static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 633 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 634 const struct iattr *attrs)
635{
ad389da7 636 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 637 struct inode *dir = parent->d_inode;
638 struct nfs_server *server = NFS_SERVER(dir);
639 struct nfs4_opendata *p;
640
641 p = kzalloc(sizeof(*p), GFP_KERNEL);
642 if (p == NULL)
643 goto err;
644 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
645 if (p->o_arg.seqid == NULL)
646 goto err_free;
ad389da7
TM		 647 p->path.mnt = mntget(path->mnt);
648 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 649 p->dir = parent;
650 p->owner = sp;
651 atomic_inc(&sp->so_count);
652 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 653 p->o_arg.open_flags = flags;
654 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 655 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 656 p->o_arg.id = sp->so_owner_id.id;
ad389da7 657 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 658 p->o_arg.server = server;
659 p->o_arg.bitmask = server->attr_bitmask;
660 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 661 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 662 if (flags & O_EXCL) {
663 u32 *s = (u32 *) p->o_arg.u.verifier.data;
664 s[0] = jiffies;
665 s[1] = current->pid;
666 } else if (flags & O_CREAT) {
667 p->o_arg.u.attrs = &p->attrs;
668 memcpy(&p->attrs, attrs, sizeof(p->attrs));
669 }
cdd4e68b
TM		 670 p->c_arg.fh = &p->o_res.fh;
671 p->c_arg.stateid = &p->o_res.stateid;
672 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 673 nfs4_init_opendata_res(p);
c6d00e63 674 kref_init(&p->kref);
e56e0b78
TM		 675 return p;
676err_free:
677 kfree(p);
678err:
679 dput(parent);
680 return NULL;
681}
682
c6d00e63 683static void nfs4_opendata_free(struct kref *kref)
e56e0b78 684{
c6d00e63
TM		 685 struct nfs4_opendata *p = container_of(kref,
686 struct nfs4_opendata, kref);
687
688 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 689 if (p->state != NULL)
690 nfs4_put_open_state(p->state);
c6d00e63
TM		 691 nfs4_put_state_owner(p->owner);
692 dput(p->dir);
31f31db1 693 path_put(&p->path);
c6d00e63
TM		 694 kfree(p);
695}
696
697static void nfs4_opendata_put(struct nfs4_opendata *p)
698{
699 if (p != NULL)
700 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 701}
702
06f814a3
TM		 703static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
704{
06f814a3
TM		 705 int ret;
706
06f814a3 707 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 708 return ret;
709}
710
dc0b027d 711static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 712{
713 int ret = 0;
dc0b027d
TM		 714
715 if (open_mode & O_EXCL)
716 goto out;
717 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 718 case FMODE_READ:
719 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 720 break;
721 case FMODE_WRITE:
722 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 723 break;
724 case FMODE_READ|FMODE_WRITE:
725 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
726 }
dc0b027d 727out:
6ee41268
TM		 728 return ret;
729}
730
dc0b027d 731static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 732{
dc0b027d 733 if ((delegation->type & fmode) != fmode)
aac00a8d 734 return 0;
15c831bf 735 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 736 return 0;
b7391f44 737 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 738 return 1;
739}
740
dc0b027d 741static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 742{
dc0b027d 743 switch (fmode) {
e7616923
TM		 744 case FMODE_WRITE:
745 state->n_wronly++;
746 break;
747 case FMODE_READ:
748 state->n_rdonly++;
749 break;
750 case FMODE_READ|FMODE_WRITE:
751 state->n_rdwr++;
752 }
dc0b027d 753 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 754}
755
dc0b027d 756static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 757{
758 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
759 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
760 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 761 switch (fmode) {
003707c7
TM		 762 case FMODE_READ:
763 set_bit(NFS_O_RDONLY_STATE, &state->flags);
764 break;
765 case FMODE_WRITE:
766 set_bit(NFS_O_WRONLY_STATE, &state->flags);
767 break;
768 case FMODE_READ|FMODE_WRITE:
769 set_bit(NFS_O_RDWR_STATE, &state->flags);
770 }
e7616923
TM		 771}
772
dc0b027d 773static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 774{
8bda4e4c 775 write_seqlock(&state->seqlock);
dc0b027d 776 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 777 write_sequnlock(&state->seqlock);
003707c7
TM		 778}
779
dc0b027d 780static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 781{
8bda4e4c
TM		 782 /*
783 * Protect the call to nfs4_state_set_mode_locked and
784 * serialise the stateid update
785 */
786 write_seqlock(&state->seqlock);
003707c7
TM		 787 if (deleg_stateid != NULL) {
788 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
789 set_bit(NFS_DELEGATED_STATE, &state->flags);
790 }
791 if (open_stateid != NULL)
dc0b027d 792 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 793 write_sequnlock(&state->seqlock);
794 spin_lock(&state->owner->so_lock);
dc0b027d 795 update_open_stateflags(state, fmode);
ec073428 796 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 797}
798
dc0b027d 799static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 800{
801 struct nfs_inode *nfsi = NFS_I(state->inode);
802 struct nfs_delegation *deleg_cur;
803 int ret = 0;
804
dc0b027d 805 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 806
807 rcu_read_lock();
808 deleg_cur = rcu_dereference(nfsi->delegation);
809 if (deleg_cur == NULL)
810 goto no_delegation;
811
812 spin_lock(&deleg_cur->lock);
813 if (nfsi->delegation != deleg_cur ||
dc0b027d 814 (deleg_cur->type & fmode) != fmode)
34310430
TM		 815 goto no_delegation_unlock;
816
817 if (delegation == NULL)
818 delegation = &deleg_cur->stateid;
819 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
820 goto no_delegation_unlock;
821
b7391f44 822 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 823 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 824 ret = 1;
825no_delegation_unlock:
826 spin_unlock(&deleg_cur->lock);
827no_delegation:
828 rcu_read_unlock();
829
830 if (!ret && open_stateid != NULL) {
dc0b027d 831 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 832 ret = 1;
833 }
834
835 return ret;
836}
837
838
dc0b027d 839static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 840{
841 struct nfs_delegation *delegation;
842
843 rcu_read_lock();
844 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 845 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 846 rcu_read_unlock();
847 return;
848 }
849 rcu_read_unlock();
850 nfs_inode_return_delegation(inode);
851}
852
6ee41268 853static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 854{
855 struct nfs4_state *state = opendata->state;
856 struct nfs_inode *nfsi = NFS_I(state->inode);
857 struct nfs_delegation *delegation;
dc0b027d
TM		 858 int open_mode = opendata->o_arg.open_flags & O_EXCL;
859 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 860 nfs4_stateid stateid;
861 int ret = -EAGAIN;
862
aac00a8d 863 for (;;) {
dc0b027d 864 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 865 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 866 if (can_open_cached(state, fmode, open_mode)) {
867 update_open_stateflags(state, fmode);
6ee41268 868 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 869 goto out_return_state;
870 }
871 spin_unlock(&state->owner->so_lock);
872 }
34310430
TM		 873 rcu_read_lock();
874 delegation = rcu_dereference(nfsi->delegation);
875 if (delegation == NULL ||
dc0b027d 876 !can_open_delegated(delegation, fmode)) {
34310430 877 rcu_read_unlock();
aac00a8d 878 break;
34310430 879 }
aac00a8d
TM		 880 /* Save the delegation */
881 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
882 rcu_read_unlock();
af22f94a 883 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 884 if (ret != 0)
885 goto out;
886 ret = -EAGAIN;
34310430
TM		 887
888 /* Try to update the stateid using the delegation */
dc0b027d 889 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 890 goto out_return_state;
aac00a8d 891 }
aac00a8d
TM		 892out:
893 return ERR_PTR(ret);
894out_return_state:
895 atomic_inc(&state->count);
896 return state;
897}
898
24ac23ab
TM		 899static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
900{
901 struct inode *inode;
902 struct nfs4_state *state = NULL;
003707c7 903 struct nfs_delegation *delegation;
1b370bc2 904 int ret;
24ac23ab 905
aac00a8d 906 if (!data->rpc_done) {
6ee41268 907 state = nfs4_try_open_cached(data);
aac00a8d
TM		 908 goto out;
909 }
910
1b370bc2 911 ret = -EAGAIN;
24ac23ab 912 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 913 goto err;
24ac23ab 914 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 915 ret = PTR_ERR(inode);
03f28e3a 916 if (IS_ERR(inode))
1b370bc2
TM		 917 goto err;
918 ret = -ENOMEM;
24ac23ab
TM		 919 state = nfs4_get_open_state(inode, data->owner);
920 if (state == NULL)
1b370bc2 921 goto err_put_inode;
549d6ed5 922 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 923 int delegation_flags = 0;
924
003707c7
TM		 925 rcu_read_lock();
926 delegation = rcu_dereference(NFS_I(inode)->delegation);
927 if (delegation)
928 delegation_flags = delegation->flags;
929 rcu_read_unlock();
15c831bf 930 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 931 nfs_inode_set_delegation(state->inode,
932 data->owner->so_cred,
933 &data->o_res);
934 else
935 nfs_inode_reclaim_delegation(state->inode,
936 data->owner->so_cred,
937 &data->o_res);
938 }
34310430
TM		 939
940 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 941 data->o_arg.fmode);
24ac23ab 942 iput(inode);
aac00a8d 943out:
24ac23ab 944 return state;
1b370bc2
TM		 945err_put_inode:
946 iput(inode);
947err:
948 return ERR_PTR(ret);
24ac23ab
TM		 949}
950
864472e9
TM		 951static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
952{
953 struct nfs_inode *nfsi = NFS_I(state->inode);
954 struct nfs_open_context *ctx;
955
956 spin_lock(&state->inode->i_lock);
957 list_for_each_entry(ctx, &nfsi->open_files, list) {
958 if (ctx->state != state)
959 continue;
960 get_nfs_open_context(ctx);
961 spin_unlock(&state->inode->i_lock);
962 return ctx;
963 }
964 spin_unlock(&state->inode->i_lock);
965 return ERR_PTR(-ENOENT);
966}
967
6f220ed5
TM		 968static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
969{
970 struct nfs4_opendata *opendata;
971
dc0b027d 972 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 973 if (opendata == NULL)
974 return ERR_PTR(-ENOMEM);
975 opendata->state = state;
976 atomic_inc(&state->count);
977 return opendata;
978}
979
dc0b027d 980static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 981{
2ced46c2 982 struct nfs4_state *newstate;
864472e9
TM		 983 int ret;
984
dc0b027d
TM		 985 opendata->o_arg.open_flags = 0;
986 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 987 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
988 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
989 nfs4_init_opendata_res(opendata);
864472e9
TM		 990 ret = _nfs4_proc_open(opendata);
991 if (ret != 0)
992 return ret;
2ced46c2 993 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 994 if (IS_ERR(newstate))
995 return PTR_ERR(newstate);
dc0b027d 996 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 997 *res = newstate;
864472e9
TM		 998 return 0;
999}
1000
1001static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1002{
864472e9 1003 struct nfs4_state *newstate;
864472e9
TM		 1004 int ret;
1005
1006 /* memory barrier prior to reading state->n_* */
2ced46c2 1007 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1008 smp_rmb();
1009 if (state->n_rdwr != 0) {
2ced46c2 1010 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1011 if (ret != 0)
1012 return ret;
2ced46c2
TM		 1013 if (newstate != state)
1014 return -ESTALE;
864472e9
TM		 1015 }
1016 if (state->n_wronly != 0) {
2ced46c2 1017 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1018 if (ret != 0)
1019 return ret;
2ced46c2
TM		 1020 if (newstate != state)
1021 return -ESTALE;
864472e9
TM		 1022 }
1023 if (state->n_rdonly != 0) {
2ced46c2 1024 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1025 if (ret != 0)
1026 return ret;
2ced46c2
TM		 1027 if (newstate != state)
1028 return -ESTALE;
864472e9 1029 }
1ac7e2fd
TM		 1030 /*
1031 * We may have performed cached opens for all three recoveries.
1032 * Check if we need to update the current stateid.
1033 */
1034 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1035 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1036 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1037 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1038 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1039 write_sequnlock(&state->seqlock);
1ac7e2fd 1040 }
864472e9
TM		 1041 return 0;
1042}
1043
1da177e4
LT		 1044/*
1045 * OPEN_RECLAIM:
1046 * reclaim state on the server after a reboot.
1da177e4 1047 */
539cd03a 1048static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1049{
1ac7e2fd 1050 struct nfs_delegation *delegation;
864472e9 1051 struct nfs4_opendata *opendata;
dc0b027d 1052 fmode_t delegation_type = 0;
1da177e4
LT		 1053 int status;
1054
6f220ed5
TM		 1055 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1056 if (IS_ERR(opendata))
1057 return PTR_ERR(opendata);
864472e9
TM		 1058 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1059 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1062 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1063 delegation_type = delegation->type;
1ac7e2fd 1064 rcu_read_unlock();
864472e9
TM		 1065 opendata->o_arg.u.delegation_type = delegation_type;
1066 status = nfs4_open_recover(opendata, state);
c6d00e63 1067 nfs4_opendata_put(opendata);
1da177e4
LT		 1068 return status;
1069}
1070
539cd03a 1071static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1072{
1073 struct nfs_server *server = NFS_SERVER(state->inode);
1074 struct nfs4_exception exception = { };
1075 int err;
1076 do {
539cd03a 1077 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1078 if (err != -NFS4ERR_DELAY)
1079 break;
1080 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1081 } while (exception.retry);
1082 return err;
1083}
1084
864472e9
TM		 1085static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1086{
1087 struct nfs_open_context *ctx;
1088 int ret;
1089
1090 ctx = nfs4_state_find_open_context(state);
1091 if (IS_ERR(ctx))
1092 return PTR_ERR(ctx);
539cd03a 1093 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1094 put_nfs_open_context(ctx);
1095 return ret;
1096}
1097
13437e12 1098static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1099{
e56e0b78 1100 struct nfs4_opendata *opendata;
864472e9 1101 int ret;
1da177e4 1102
6f220ed5
TM		 1103 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1104 if (IS_ERR(opendata))
1105 return PTR_ERR(opendata);
e56e0b78 1106 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1107 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1108 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1109 ret = nfs4_open_recover(opendata, state);
c6d00e63 1110 nfs4_opendata_put(opendata);
864472e9 1111 return ret;
1da177e4
LT		 1112}
1113
13437e12 1114int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1115{
1116 struct nfs4_exception exception = { };
539cd03a 1117 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1118 int err;
1119 do {
13437e12 1120 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1121 switch (err) {
1122 case 0:
1123 return err;
1124 case -NFS4ERR_STALE_CLIENTID:
1125 case -NFS4ERR_STALE_STATEID:
1126 case -NFS4ERR_EXPIRED:
1127 /* Don't recall a delegation if it was lost */
7539bbab 1128 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1129 return err;
1130 }
1131 err = nfs4_handle_exception(server, err, &exception);
1132 } while (exception.retry);
1133 return err;
1134}
1135
cdd4e68b
TM		 1136static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1137{
1138 struct nfs4_opendata *data = calldata;
1139
1140 data->rpc_status = task->tk_status;
1141 if (RPC_ASSASSINATED(task))
1142 return;
26e976a8 1143 if (data->rpc_status == 0) {
cdd4e68b
TM		 1144 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1145 sizeof(data->o_res.stateid.data));
bb22629e 1146 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1147 renew_lease(data->o_res.server, data->timestamp);
3e309914 1148 data->rpc_done = 1;
26e976a8 1149 }
cdd4e68b
TM		 1150}
1151
1152static void nfs4_open_confirm_release(void *calldata)
1153{
1154 struct nfs4_opendata *data = calldata;
1155 struct nfs4_state *state = NULL;
1156
1157 /* If this request hasn't been cancelled, do nothing */
1158 if (data->cancelled == 0)
1159 goto out_free;
1160 /* In case of error, no cleanup! */
3e309914 1161 if (!data->rpc_done)
cdd4e68b 1162 goto out_free;
cdd4e68b 1163 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1164 if (!IS_ERR(state))
dc0b027d 1165 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1166out_free:
c6d00e63 1167 nfs4_opendata_put(data);
cdd4e68b
TM		 1168}
1169
1170static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1171 .rpc_call_done = nfs4_open_confirm_done,
1172 .rpc_release = nfs4_open_confirm_release,
1173};
1174
1175/*
1176 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1177 */
1178static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1179{
1180 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1181 struct rpc_task *task;
5138fde0
TM		 1182 struct rpc_message msg = {
1183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1184 .rpc_argp = &data->c_arg,
1185 .rpc_resp = &data->c_res,
1186 .rpc_cred = data->owner->so_cred,
1187 };
c970aa85
TM		 1188 struct rpc_task_setup task_setup_data = {
1189 .rpc_client = server->client,
5138fde0 1190 .rpc_message = &msg,
c970aa85
TM		 1191 .callback_ops = &nfs4_open_confirm_ops,
1192 .callback_data = data,
101070ca 1193 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1194 .flags = RPC_TASK_ASYNC,
1195 };
1da177e4
LT		 1196 int status;
1197
c6d00e63 1198 kref_get(&data->kref);
3e309914
TM		 1199 data->rpc_done = 0;
1200 data->rpc_status = 0;
5138fde0 1201 data->timestamp = jiffies;
c970aa85 1202 task = rpc_run_task(&task_setup_data);
7a1218a2 1203 if (IS_ERR(task))
cdd4e68b 1204 return PTR_ERR(task);
cdd4e68b
TM		 1205 status = nfs4_wait_for_completion_rpc_task(task);
1206 if (status != 0) {
1207 data->cancelled = 1;
1208 smp_wmb();
1209 } else
1210 status = data->rpc_status;
e6b3c4db 1211 rpc_put_task(task);
1da177e4
LT		 1212 return status;
1213}
1214
24ac23ab 1215static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1216{
24ac23ab
TM		 1217 struct nfs4_opendata *data = calldata;
1218 struct nfs4_state_owner *sp = data->owner;
5138fde0 1219
24ac23ab
TM		 1220 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1221 return;
aac00a8d
TM		 1222 /*
1223 * Check if we still need to send an OPEN call, or if we can use
1224 * a delegation instead.
1225 */
1226 if (data->state != NULL) {
1227 struct nfs_delegation *delegation;
1228
dc0b027d 1229 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1230 goto out_no_action;
aac00a8d
TM		 1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1233 if (delegation != NULL &&
15c831bf 1234 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1235 rcu_read_unlock();
6ee41268 1236 goto out_no_action;
aac00a8d
TM		 1237 }
1238 rcu_read_unlock();
1239 }
24ac23ab 1240 /* Update sequence id. */
9f958ab8 1241 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1242 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1243 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1244 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1245 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1246 }
26e976a8 1247 data->timestamp = jiffies;
d898528c
AA		 1248 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1249 &data->o_arg.seq_args,
1250 &data->o_res.seq_res, 1, task))
1251 return;
5138fde0 1252 rpc_call_start(task);
6ee41268
TM		 1253 return;
1254out_no_action:
1255 task->tk_action = NULL;
1256
24ac23ab 1257}
1da177e4 1258
24ac23ab
TM		 1259static void nfs4_open_done(struct rpc_task *task, void *calldata)
1260{
1261 struct nfs4_opendata *data = calldata;
1da177e4 1262
24ac23ab 1263 data->rpc_status = task->tk_status;
d898528c
AA		 1264
1265 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1266 task->tk_status);
1267
24ac23ab
TM		 1268 if (RPC_ASSASSINATED(task))
1269 return;
1270 if (task->tk_status == 0) {
1271 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1272 case S_IFREG:
1273 break;
1274 case S_IFLNK:
24ac23ab 1275 data->rpc_status = -ELOOP;
6f926b5b
TM		 1276 break;
1277 case S_IFDIR:
24ac23ab 1278 data->rpc_status = -EISDIR;
6f926b5b
TM		 1279 break;
1280 default:
24ac23ab 1281 data->rpc_status = -ENOTDIR;
6f926b5b 1282 }
26e976a8 1283 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1284 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1285 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1286 }
3e309914 1287 data->rpc_done = 1;
24ac23ab 1288}
6f926b5b 1289
24ac23ab
TM		 1290static void nfs4_open_release(void *calldata)
1291{
1292 struct nfs4_opendata *data = calldata;
1293 struct nfs4_state *state = NULL;
1294
1295 /* If this request hasn't been cancelled, do nothing */
1296 if (data->cancelled == 0)
1297 goto out_free;
1298 /* In case of error, no cleanup! */
3e309914 1299 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1300 goto out_free;
1301 /* In case we need an open_confirm, no cleanup! */
1302 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1303 goto out_free;
24ac23ab 1304 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1305 if (!IS_ERR(state))
dc0b027d 1306 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1307out_free:
c6d00e63 1308 nfs4_opendata_put(data);
24ac23ab
TM		 1309}
1310
1311static const struct rpc_call_ops nfs4_open_ops = {
1312 .rpc_call_prepare = nfs4_open_prepare,
1313 .rpc_call_done = nfs4_open_done,
1314 .rpc_release = nfs4_open_release,
1315};
1316
1317/*
1318 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1319 */
1320static int _nfs4_proc_open(struct nfs4_opendata *data)
1321{
1322 struct inode *dir = data->dir->d_inode;
1323 struct nfs_server *server = NFS_SERVER(dir);
1324 struct nfs_openargs *o_arg = &data->o_arg;
1325 struct nfs_openres *o_res = &data->o_res;
1326 struct rpc_task *task;
5138fde0
TM		 1327 struct rpc_message msg = {
1328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1329 .rpc_argp = o_arg,
1330 .rpc_resp = o_res,
1331 .rpc_cred = data->owner->so_cred,
1332 };
c970aa85
TM		 1333 struct rpc_task_setup task_setup_data = {
1334 .rpc_client = server->client,
5138fde0 1335 .rpc_message = &msg,
c970aa85
TM		 1336 .callback_ops = &nfs4_open_ops,
1337 .callback_data = data,
101070ca 1338 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1339 .flags = RPC_TASK_ASYNC,
1340 };
24ac23ab
TM		 1341 int status;
1342
c6d00e63 1343 kref_get(&data->kref);
3e309914
TM		 1344 data->rpc_done = 0;
1345 data->rpc_status = 0;
2ced46c2 1346 data->cancelled = 0;
c970aa85 1347 task = rpc_run_task(&task_setup_data);
7a1218a2 1348 if (IS_ERR(task))
24ac23ab 1349 return PTR_ERR(task);
24ac23ab
TM		 1350 status = nfs4_wait_for_completion_rpc_task(task);
1351 if (status != 0) {
1352 data->cancelled = 1;
1353 smp_wmb();
1354 } else
1355 status = data->rpc_status;
e6b3c4db 1356 rpc_put_task(task);
3e309914 1357 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1358 return status;
1359
9936781d
TM		 1360 if (o_res->fh.size == 0)
1361 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1362
56ae19f3
TM		 1363 if (o_arg->open_flags & O_CREAT) {
1364 update_changeattr(dir, &o_res->cinfo);
1365 nfs_post_op_update_inode(dir, o_res->dir_attr);
1366 } else
1367 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1368 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1369 status = _nfs4_proc_open_confirm(data);
1da177e4 1370 if (status != 0)
24ac23ab 1371 return status;
1da177e4
LT		 1372 }
1373 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1374 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1375 return 0;
1da177e4
LT		 1376}
1377
10afec90 1378static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1379{
7539bbab 1380 struct nfs_client *clp = server->nfs_client;
6b30954e 1381 int ret;
58d9714a 1382
6b30954e 1383 for (;;) {
65de872e 1384 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1385 if (ret != 0)
1386 return ret;
e598d843
TM		 1387 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1388 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1389 break;
58d9714a 1390 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1391 }
1392 return 0;
58d9714a
TM		 1393}
1394
1da177e4
LT		 1395/*
1396 * OPEN_EXPIRED:
1397 * reclaim state on the server after a network partition.
1398 * Assumes caller holds the appropriate lock
1399 */
539cd03a 1400static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1401{
e56e0b78 1402 struct nfs4_opendata *opendata;
864472e9 1403 int ret;
1da177e4 1404
6f220ed5
TM		 1405 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1406 if (IS_ERR(opendata))
1407 return PTR_ERR(opendata);
864472e9 1408 ret = nfs4_open_recover(opendata, state);
35d05778 1409 if (ret == -ESTALE)
539cd03a 1410 d_drop(ctx->path.dentry);
c6d00e63 1411 nfs4_opendata_put(opendata);
864472e9 1412 return ret;
1da177e4
LT		 1413}
1414
539cd03a 1415static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1416{
539cd03a 1417 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1418 struct nfs4_exception exception = { };
1419 int err;
1420
1421 do {
539cd03a 1422 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1423 if (err != -NFS4ERR_DELAY)
1424 break;
1425 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1426 } while (exception.retry);
1427 return err;
1428}
1429
1da177e4
LT		 1430static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1431{
1da177e4 1432 struct nfs_open_context *ctx;
864472e9 1433 int ret;
1da177e4 1434
864472e9
TM		 1435 ctx = nfs4_state_find_open_context(state);
1436 if (IS_ERR(ctx))
1437 return PTR_ERR(ctx);
539cd03a 1438 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1439 put_nfs_open_context(ctx);
1440 return ret;
1da177e4
LT		 1441}
1442
aa53ed54
JL		 1443/*
1444 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1445 * fields corresponding to attributes that were used to store the verifier.
1446 * Make sure we clobber those fields in the later setattr call
1447 */
1448static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1449{
1450 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1451 !(sattr->ia_valid & ATTR_ATIME_SET))
1452 sattr->ia_valid |= ATTR_ATIME;
1453
1454 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1455 !(sattr->ia_valid & ATTR_MTIME_SET))
1456 sattr->ia_valid |= ATTR_MTIME;
1457}
1458
1da177e4 1459/*
24ac23ab 1460 * Returns a referenced nfs4_state
1da177e4 1461 */
dc0b027d 1462static 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		 1463{
1464 struct nfs4_state_owner *sp;
1465 struct nfs4_state *state = NULL;
1466 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1467 struct nfs4_opendata *opendata;
aac00a8d 1468 int status;
1da177e4
LT		 1469
1470 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1471 status = -ENOMEM;
1472 if (!(sp = nfs4_get_state_owner(server, cred))) {
1473 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1474 goto out_err;
1475 }
58d9714a
TM		 1476 status = nfs4_recover_expired_lease(server);
1477 if (status != 0)
b4454fe1 1478 goto err_put_state_owner;
aac00a8d 1479 if (path->dentry->d_inode != NULL)
dc0b027d 1480 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1481 status = -ENOMEM;
dc0b027d 1482 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1483 if (opendata == NULL)
95d35cb4 1484 goto err_put_state_owner;
1da177e4 1485
aac00a8d
TM		 1486 if (path->dentry->d_inode != NULL)
1487 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1488
24ac23ab 1489 status = _nfs4_proc_open(opendata);
1da177e4 1490 if (status != 0)
c6d00e63 1491 goto err_opendata_put;
1da177e4 1492
aa53ed54
JL		 1493 if (opendata->o_arg.open_flags & O_EXCL)
1494 nfs4_exclusive_attrset(opendata, sattr);
1495
24ac23ab 1496 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1497 status = PTR_ERR(state);
1498 if (IS_ERR(state))
c6d00e63 1499 goto err_opendata_put;
c6d00e63 1500 nfs4_opendata_put(opendata);
1da177e4 1501 nfs4_put_state_owner(sp);
1da177e4
LT		 1502 *res = state;
1503 return 0;
c6d00e63
TM		 1504err_opendata_put:
1505 nfs4_opendata_put(opendata);
e56e0b78
TM		 1506err_put_state_owner:
1507 nfs4_put_state_owner(sp);
1da177e4 1508out_err:
1da177e4
LT		 1509 *res = NULL;
1510 return status;
1511}
1512
1513
dc0b027d 1514static 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		 1515{
1516 struct nfs4_exception exception = { };
1517 struct nfs4_state *res;
1518 int status;
1519
1520 do {
dc0b027d 1521 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1522 if (status == 0)
1523 break;
1524 /* NOTE: BAD_SEQID means the server and client disagree about the
1525 * book-keeping w.r.t. state-changing operations
1526 * (OPEN/CLOSE/LOCK/LOCKU...)
1527 * It is actually a sign of a bug on the client or on the server.
1528 *
1529 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1530 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1531 * have unhashed the old state_owner for us, and that we can
1532 * therefore safely retry using a new one. We should still warn
1533 * the user though...
1534 */
1535 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1536 printk(KERN_WARNING "NFS: v4 server %s "
1537 " returned a bad sequence-id error!\n",
1538 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1539 exception.retry = 1;
1540 continue;
1541 }
550f5747
TM		 1542 /*
1543 * BAD_STATEID on OPEN means that the server cancelled our
1544 * state before it received the OPEN_CONFIRM.
1545 * Recover by retrying the request as per the discussion
1546 * on Page 181 of RFC3530.
1547 */
1548 if (status == -NFS4ERR_BAD_STATEID) {
1549 exception.retry = 1;
1550 continue;
1551 }
aac00a8d
TM		 1552 if (status == -EAGAIN) {
1553 /* We must have found a delegation */
1554 exception.retry = 1;
1555 continue;
1556 }
1da177e4
LT		 1557 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1558 status, &exception));
1559 } while (exception.retry);
1560 return res;
1561}
1562
659bfcd6
TM		 1563static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1564 struct nfs_fattr *fattr, struct iattr *sattr,
1565 struct nfs4_state *state)
1da177e4 1566{
3e4f6290 1567 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1568 struct nfs_setattrargs arg = {
3e4f6290 1569 .fh = NFS_FH(inode),
1da177e4
LT		 1570 .iap = sattr,
1571 .server = server,
1572 .bitmask = server->attr_bitmask,
1573 };
1574 struct nfs_setattrres res = {
1575 .fattr = fattr,
1576 .server = server,
1577 };
1578 struct rpc_message msg = {
659bfcd6
TM		 1579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1580 .rpc_argp = &arg,
1581 .rpc_resp = &res,
1582 .rpc_cred = cred,
1da177e4 1583 };
26e976a8 1584 unsigned long timestamp = jiffies;
65e4308d 1585 int status;
1da177e4 1586
0e574af1 1587 nfs_fattr_init(fattr);
1da177e4 1588
3e4f6290
TM		 1589 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1590 /* Use that stateid */
1591 } else if (state != NULL) {
08e9eac4
TM		 1592 nfs4_copy_stateid(&arg.stateid, state, current->files);
1593 } else
1da177e4
LT		 1594 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1595
cccef3b9 1596 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1597 if (status == 0 && state != NULL)
1598 renew_lease(server, timestamp);
65e4308d 1599 return status;
1da177e4
LT		 1600}
1601
659bfcd6
TM		 1602static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1603 struct nfs_fattr *fattr, struct iattr *sattr,
1604 struct nfs4_state *state)
1da177e4 1605{
3e4f6290 1606 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1607 struct nfs4_exception exception = { };
1608 int err;
1609 do {
1610 err = nfs4_handle_exception(server,
659bfcd6 1611 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1612 &exception);
1613 } while (exception.retry);
1614 return err;
1615}
1616
1617struct nfs4_closedata {
4a35bd41 1618 struct path path;
1da177e4
LT		 1619 struct inode *inode;
1620 struct nfs4_state *state;
1621 struct nfs_closeargs arg;
1622 struct nfs_closeres res;
516a6af6 1623 struct nfs_fattr fattr;
26e976a8 1624 unsigned long timestamp;
1da177e4
LT		 1625};
1626
963d8fe5 1627static void nfs4_free_closedata(void *data)
9512135d 1628{
963d8fe5
TM		 1629 struct nfs4_closedata *calldata = data;
1630 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1631
1632 nfs4_put_open_state(calldata->state);
1633 nfs_free_seqid(calldata->arg.seqid);
9512135d 1634 nfs4_put_state_owner(sp);
31f31db1 1635 path_put(&calldata->path);
9512135d
TM		 1636 kfree(calldata);
1637}
1638
963d8fe5 1639static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1640{
963d8fe5 1641 struct nfs4_closedata *calldata = data;
1da177e4 1642 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1643 struct nfs_server *server = NFS_SERVER(calldata->inode);
1644
19ddab06 1645 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1646 if (RPC_ASSASSINATED(task))
1647 return;
1da177e4
LT		 1648 /* hmm. we are done with the inode, and in the process of freeing
1649 * the state_owner. we keep this around to process errors
1650 */
1da177e4
LT		 1651 switch (task->tk_status) {
1652 case 0:
45328c35 1653 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1654 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1655 break;
1656 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1657 case -NFS4ERR_OLD_STATEID:
1658 case -NFS4ERR_BAD_STATEID:
1da177e4 1659 case -NFS4ERR_EXPIRED:
dc0b027d 1660 if (calldata->arg.fmode == 0)
9e33bed5 1661 break;
1da177e4 1662 default:
9e33bed5 1663 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1664 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1665 return;
1666 }
1667 }
19ddab06 1668 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1669 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1670}
1671
4ce70ada 1672static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1673{
4ce70ada 1674 struct nfs4_closedata *calldata = data;
9512135d 1675 struct nfs4_state *state = calldata->state;
003707c7 1676 int clear_rd, clear_wr, clear_rdwr;
9512135d 1677
963d8fe5 1678 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1679 return;
003707c7 1680
003707c7 1681 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1682 spin_lock(&state->owner->so_lock);
003707c7 1683 /* Calculate the change in open mode */
e7616923 1684 if (state->n_rdwr == 0) {
003707c7 1685 if (state->n_rdonly == 0) {
003707c7
TM		 1686 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1687 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1688 }
1689 if (state->n_wronly == 0) {
003707c7
TM		 1690 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1691 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1692 }
e7616923 1693 }
4cecb76f 1694 spin_unlock(&state->owner->so_lock);
003707c7 1695 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1696 /* Note: exit _without_ calling nfs4_close_done */
1697 task->tk_action = NULL;
9512135d
TM		 1698 return;
1699 }
516a6af6 1700 nfs_fattr_init(calldata->res.fattr);
45328c35 1701 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1702 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1703 calldata->arg.fmode = FMODE_READ;
45328c35 1704 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1705 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1706 calldata->arg.fmode = FMODE_WRITE;
45328c35 1707 }
26e976a8 1708 calldata->timestamp = jiffies;
19ddab06
AA		 1709 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1710 &calldata->arg.seq_args, &calldata->res.seq_res,
1711 1, task))
1712 return;
5138fde0 1713 rpc_call_start(task);
1da177e4
LT		 1714}
1715
963d8fe5 1716static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1717 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1718 .rpc_call_done = nfs4_close_done,
1719 .rpc_release = nfs4_free_closedata,
1720};
1721
1da177e4
LT		 1722/*
1723 * It is possible for data to be read/written from a mem-mapped file
1724 * after the sys_close call (which hits the vfs layer as a flush).
1725 * This means that we can't safely call nfsv4 close on a file until
1726 * the inode is cleared. This in turn means that we are not good
1727 * NFSv4 citizens - we do not indicate to the server to update the file's
1728 * share state even when we are done with one of the three share
1729 * stateid's in the inode.
1730 *
1731 * NOTE: Caller must be holding the sp->so_owner semaphore!
1732 */
a49c3c77 1733int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1734{
4a35bd41 1735 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1736 struct nfs4_closedata *calldata;
b39e625b
TM		 1737 struct nfs4_state_owner *sp = state->owner;
1738 struct rpc_task *task;
5138fde0
TM		 1739 struct rpc_message msg = {
1740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1741 .rpc_cred = state->owner->so_cred,
1742 };
c970aa85
TM		 1743 struct rpc_task_setup task_setup_data = {
1744 .rpc_client = server->client,
5138fde0 1745 .rpc_message = &msg,
c970aa85 1746 .callback_ops = &nfs4_close_ops,
101070ca 1747 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1748 .flags = RPC_TASK_ASYNC,
1749 };
9512135d 1750 int status = -ENOMEM;
1da177e4 1751
19ddab06 1752 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1753 if (calldata == NULL)
9512135d 1754 goto out;
4a35bd41 1755 calldata->inode = state->inode;
1da177e4 1756 calldata->state = state;
4a35bd41 1757 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1758 calldata->arg.stateid = &state->open_stateid;
1da177e4 1759 /* Serialization for the sequence id */
cee54fc9 1760 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1761 if (calldata->arg.seqid == NULL)
1762 goto out_free_calldata;
dc0b027d 1763 calldata->arg.fmode = 0;
a65318bf 1764 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1765 calldata->res.fattr = &calldata->fattr;
c1d51931 1766 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1767 calldata->res.server = server;
5f7dbd5c 1768 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1769 calldata->path.mnt = mntget(path->mnt);
1770 calldata->path.dentry = dget(path->dentry);
9512135d 1771
5138fde0
TM		 1772 msg.rpc_argp = &calldata->arg,
1773 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1774 task_setup_data.callback_data = calldata;
1775 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1776 if (IS_ERR(task))
1777 return PTR_ERR(task);
a49c3c77
TM		 1778 status = 0;
1779 if (wait)
1780 status = rpc_wait_for_completion_task(task);
b39e625b 1781 rpc_put_task(task);
a49c3c77 1782 return status;
9512135d
TM		 1783out_free_calldata:
1784 kfree(calldata);
1785out:
b39e625b
TM		 1786 nfs4_put_open_state(state);
1787 nfs4_put_state_owner(sp);
9512135d 1788 return status;
1da177e4
LT		 1789}
1790
dc0b027d 1791static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1792{
1793 struct file *filp;
1b45c46c 1794 int ret;
02a913a7 1795
1b45c46c 1796 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1797 if (fmode & FMODE_EXEC) {
af22f94a 1798 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1799 state->owner->so_cred,
1800 nd->intent.open.flags);
1801 if (ret < 0)
1802 goto out_close;
1803 }
4a35bd41 1804 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1805 if (!IS_ERR(filp)) {
1806 struct nfs_open_context *ctx;
cd3758e3 1807 ctx = nfs_file_open_context(filp);
02a913a7 1808 ctx->state = state;
95cf959b
TM		 1809 return 0;
1810 }
1b45c46c
TM		 1811 ret = PTR_ERR(filp);
1812out_close:
dc0b027d 1813 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1814 return ret;
02a913a7
TM		 1815}
1816
1817struct dentry *
1da177e4
LT		 1818nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1819{
ad389da7 1820 struct path path = {
4ac91378 1821 .mnt = nd->path.mnt,
ad389da7
TM		 1822 .dentry = dentry,
1823 };
4ac91378 1824 struct dentry *parent;
1da177e4
LT		 1825 struct iattr attr;
1826 struct rpc_cred *cred;
1827 struct nfs4_state *state;
02a913a7 1828 struct dentry *res;
dc0b027d 1829 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1830
1831 if (nd->flags & LOOKUP_CREATE) {
1832 attr.ia_mode = nd->intent.open.create_mode;
1833 attr.ia_valid = ATTR_MODE;
1834 if (!IS_POSIXACL(dir))
ce3b0f8d 1835 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1836 } else {
1837 attr.ia_valid = 0;
1838 BUG_ON(nd->intent.open.flags & O_CREAT);
1839 }
1840
98a8e323 1841 cred = rpc_lookup_cred();
1da177e4 1842 if (IS_ERR(cred))
02a913a7 1843 return (struct dentry *)cred;
565277f6
TM		 1844 parent = dentry->d_parent;
1845 /* Protect against concurrent sillydeletes */
1846 nfs_block_sillyrename(parent);
dc0b027d 1847 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1848 put_rpccred(cred);
02a913a7 1849 if (IS_ERR(state)) {
d75340cc 1850 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1851 d_add(dentry, NULL);
d75340cc
TM		 1852 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1853 }
565277f6 1854 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1855 return (struct dentry *)state;
1856 }
24ac23ab 1857 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1858 if (res != NULL)
deee9369 1859 path.dentry = res;
d75340cc 1860 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1861 nfs_unblock_sillyrename(parent);
dc0b027d 1862 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1863 return res;
1da177e4
LT		 1864}
1865
1866int
02a913a7 1867nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1868{
ad389da7 1869 struct path path = {
4ac91378 1870 .mnt = nd->path.mnt,
ad389da7
TM		 1871 .dentry = dentry,
1872 };
1da177e4
LT		 1873 struct rpc_cred *cred;
1874 struct nfs4_state *state;
dc0b027d 1875 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1876
98a8e323 1877 cred = rpc_lookup_cred();
1da177e4
LT		 1878 if (IS_ERR(cred))
1879 return PTR_ERR(cred);
dc0b027d 1880 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1881 put_rpccred(cred);
02a913a7
TM		 1882 if (IS_ERR(state)) {
1883 switch (PTR_ERR(state)) {
1884 case -EPERM:
1885 case -EACCES:
1886 case -EDQUOT:
1887 case -ENOSPC:
1888 case -EROFS:
1889 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1890 return 1;
b87c0adf
CL		 1891 default:
1892 goto out_drop;
02a913a7 1893 }
02a913a7 1894 }
24ac23ab 1895 if (state->inode == dentry->d_inode) {
d75340cc 1896 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1897 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1898 return 1;
1899 }
dc0b027d 1900 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1901out_drop:
1902 d_drop(dentry);
1da177e4
LT		 1903 return 0;
1904}
1905
7fe5c398
TM		 1906void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1907{
1908 if (ctx->state == NULL)
1909 return;
1910 if (is_sync)
1911 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1912 else
1913 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1914}
1da177e4
LT		 1915
1916static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1917{
43652ad5
BH		 1918 struct nfs4_server_caps_arg args = {
1919 .fhandle = fhandle,
1920 };
1da177e4
LT		 1921 struct nfs4_server_caps_res res = {};
1922 struct rpc_message msg = {
1923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1924 .rpc_argp = &args,
1da177e4
LT		 1925 .rpc_resp = &res,
1926 };
1927 int status;
1928
cccef3b9 1929 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1930 if (status == 0) {
1931 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1932 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1933 server->caps |= NFS_CAP_ACLS;
1934 if (res.has_links != 0)
1935 server->caps |= NFS_CAP_HARDLINKS;
1936 if (res.has_symlinks != 0)
1937 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1938 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1939 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1940 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1941 server->acl_bitmask = res.acl_bitmask;
1942 }
cccef3b9 1943
1da177e4
LT		 1944 return status;
1945}
1946
55a97593 1947int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1948{
1949 struct nfs4_exception exception = { };
1950 int err;
1951 do {
1952 err = nfs4_handle_exception(server,
1953 _nfs4_server_capabilities(server, fhandle),
1954 &exception);
1955 } while (exception.retry);
1956 return err;
1957}
1958
1959static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1960 struct nfs_fsinfo *info)
1961{
1da177e4
LT		 1962 struct nfs4_lookup_root_arg args = {
1963 .bitmask = nfs4_fattr_bitmap,
1964 };
1965 struct nfs4_lookup_res res = {
1966 .server = server,
0e574af1 1967 .fattr = info->fattr,
1da177e4
LT		 1968 .fh = fhandle,
1969 };
1970 struct rpc_message msg = {
1971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1972 .rpc_argp = &args,
1973 .rpc_resp = &res,
1974 };
0e574af1 1975 nfs_fattr_init(info->fattr);
cccef3b9 1976 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1977}
1978
1979static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1980 struct nfs_fsinfo *info)
1981{
1982 struct nfs4_exception exception = { };
1983 int err;
1984 do {
1985 err = nfs4_handle_exception(server,
1986 _nfs4_lookup_root(server, fhandle, info),
1987 &exception);
1988 } while (exception.retry);
1989 return err;
1990}
1991
54ceac45
DH		 1992/*
1993 * get the file handle for the "/" directory on the server
1994 */
1da177e4 1995static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1996 struct nfs_fsinfo *info)
1da177e4 1997{
1da177e4
LT		 1998 int status;
1999
1da177e4 2000 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2001 if (status == 0)
2002 status = nfs4_server_capabilities(server, fhandle);
2003 if (status == 0)
2004 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2005 return nfs4_map_errors(status);
1da177e4
LT		 2006}
2007
6b97fd3d
MN		 2008/*
2009 * Get locations and (maybe) other attributes of a referral.
2010 * Note that we'll actually follow the referral later when
2011 * we detect fsid mismatch in inode revalidation
2012 */
56659e99 2013static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2014{
2015 int status = -ENOMEM;
2016 struct page *page = NULL;
2017 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2018
2019 page = alloc_page(GFP_KERNEL);
2020 if (page == NULL)
2021 goto out;
2022 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2023 if (locations == NULL)
2024 goto out;
2025
c228fd3a 2026 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2027 if (status != 0)
2028 goto out;
2029 /* Make sure server returned a different fsid for the referral */
2030 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2031 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2032 status = -EIO;
2033 goto out;
2034 }
2035
2036 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2037 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2038 if (!fattr->mode)
2039 fattr->mode = S_IFDIR;
2040 memset(fhandle, 0, sizeof(struct nfs_fh));
2041out:
2042 if (page)
2043 __free_page(page);
2044 if (locations)
2045 kfree(locations);
2046 return status;
2047}
2048
1da177e4
LT		 2049static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2050{
2051 struct nfs4_getattr_arg args = {
2052 .fh = fhandle,
2053 .bitmask = server->attr_bitmask,
2054 };
2055 struct nfs4_getattr_res res = {
2056 .fattr = fattr,
2057 .server = server,
2058 };
2059 struct rpc_message msg = {
2060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2061 .rpc_argp = &args,
2062 .rpc_resp = &res,
2063 };
2064
0e574af1 2065 nfs_fattr_init(fattr);
cccef3b9 2066 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2067}
2068
2069static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2070{
2071 struct nfs4_exception exception = { };
2072 int err;
2073 do {
2074 err = nfs4_handle_exception(server,
2075 _nfs4_proc_getattr(server, fhandle, fattr),
2076 &exception);
2077 } while (exception.retry);
2078 return err;
2079}
2080
2081/*
2082 * The file is not closed if it is opened due to the a request to change
2083 * the size of the file. The open call will not be needed once the
2084 * VFS layer lookup-intents are implemented.
2085 *
2086 * Close is called when the inode is destroyed.
2087 * If we haven't opened the file for O_WRONLY, we
2088 * need to in the size_change case to obtain a stateid.
2089 *
2090 * Got race?
2091 * Because OPEN is always done by name in nfsv4, it is
2092 * possible that we opened a different file by the same
2093 * name. We can recognize this race condition, but we
2094 * can't do anything about it besides returning an error.
2095 *
2096 * This will be fixed with VFS changes (lookup-intent).
2097 */
2098static int
2099nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2100 struct iattr *sattr)
2101{
08e9eac4 2102 struct inode *inode = dentry->d_inode;
659bfcd6 2103 struct rpc_cred *cred = NULL;
d530838b 2104 struct nfs4_state *state = NULL;
1da177e4
LT		 2105 int status;
2106
0e574af1 2107 nfs_fattr_init(fattr);
1da177e4 2108
d530838b 2109 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2110 if (sattr->ia_valid & ATTR_FILE) {
2111 struct nfs_open_context *ctx;
2112
2113 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2114 if (ctx) {
2115 cred = ctx->cred;
2116 state = ctx->state;
2117 }
659bfcd6 2118 }
08e9eac4 2119
659bfcd6 2120 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2121 if (status == 0)
2122 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2123 return status;
2124}
2125
56659e99
TM		 2126static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2127 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2128 struct nfs_fattr *fattr)
2129{
2130 int status;
2131 struct nfs4_lookup_arg args = {
2132 .bitmask = server->attr_bitmask,
2133 .dir_fh = dirfh,
2134 .name = name,
2135 };
2136 struct nfs4_lookup_res res = {
2137 .server = server,
2138 .fattr = fattr,
2139 .fh = fhandle,
2140 };
2141 struct rpc_message msg = {
2142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2143 .rpc_argp = &args,
2144 .rpc_resp = &res,
2145 };
2146
2147 nfs_fattr_init(fattr);
2148
2149 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2150 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2151 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2152 return status;
2153}
2154
2155static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2156 struct qstr *name, struct nfs_fh *fhandle,
2157 struct nfs_fattr *fattr)
2158{
2159 struct nfs4_exception exception = { };
2160 int err;
2161 do {
4e56e082
TM		 2162 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2163 /* FIXME: !!!! */
2164 if (err == -NFS4ERR_MOVED) {
2165 err = -EREMOTE;
2166 break;
2167 }
2168 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2169 } while (exception.retry);
2170 return err;
2171}
2172
56659e99 2173static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2174 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2175{
4e56e082 2176 int status;
1da177e4
LT		 2177
2178 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2179 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2180 if (status == -NFS4ERR_MOVED)
2181 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2182 dprintk("NFS reply lookup: %d\n", status);
2183 return status;
2184}
2185
2186static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2187{
2188 struct nfs4_exception exception = { };
2189 int err;
2190 do {
2191 err = nfs4_handle_exception(NFS_SERVER(dir),
2192 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2193 &exception);
2194 } while (exception.retry);
2195 return err;
2196}
2197
2198static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2199{
76b32999
TM		 2200 struct nfs_server *server = NFS_SERVER(inode);
2201 struct nfs_fattr fattr;
1da177e4
LT		 2202 struct nfs4_accessargs args = {
2203 .fh = NFS_FH(inode),
76b32999
TM		 2204 .bitmask = server->attr_bitmask,
2205 };
2206 struct nfs4_accessres res = {
2207 .server = server,
2208 .fattr = &fattr,
1da177e4 2209 };
1da177e4
LT		 2210 struct rpc_message msg = {
2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2212 .rpc_argp = &args,
2213 .rpc_resp = &res,
2214 .rpc_cred = entry->cred,
2215 };
2216 int mode = entry->mask;
2217 int status;
2218
2219 /*
2220 * Determine which access bits we want to ask for...
2221 */
2222 if (mode & MAY_READ)
2223 args.access |= NFS4_ACCESS_READ;
2224 if (S_ISDIR(inode->i_mode)) {
2225 if (mode & MAY_WRITE)
2226 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2227 if (mode & MAY_EXEC)
2228 args.access |= NFS4_ACCESS_LOOKUP;
2229 } else {
2230 if (mode & MAY_WRITE)
2231 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2232 if (mode & MAY_EXEC)
2233 args.access |= NFS4_ACCESS_EXECUTE;
2234 }
76b32999 2235 nfs_fattr_init(&fattr);
cccef3b9 2236 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2237 if (!status) {
2238 entry->mask = 0;
2239 if (res.access & NFS4_ACCESS_READ)
2240 entry->mask |= MAY_READ;
2241 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2242 entry->mask |= MAY_WRITE;
2243 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2244 entry->mask |= MAY_EXEC;
76b32999 2245 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2246 }
2247 return status;
2248}
2249
2250static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2251{
2252 struct nfs4_exception exception = { };
2253 int err;
2254 do {
2255 err = nfs4_handle_exception(NFS_SERVER(inode),
2256 _nfs4_proc_access(inode, entry),
2257 &exception);
2258 } while (exception.retry);
2259 return err;
2260}
2261
2262/*
2263 * TODO: For the time being, we don't try to get any attributes
2264 * along with any of the zero-copy operations READ, READDIR,
2265 * READLINK, WRITE.
2266 *
2267 * In the case of the first three, we want to put the GETATTR
2268 * after the read-type operation -- this is because it is hard
2269 * to predict the length of a GETATTR response in v4, and thus
2270 * align the READ data correctly. This means that the GETATTR
2271 * may end up partially falling into the page cache, and we should
2272 * shift it into the 'tail' of the xdr_buf before processing.
2273 * To do this efficiently, we need to know the total length
2274 * of data received, which doesn't seem to be available outside
2275 * of the RPC layer.
2276 *
2277 * In the case of WRITE, we also want to put the GETATTR after
2278 * the operation -- in this case because we want to make sure
2279 * we get the post-operation mtime and size. This means that
2280 * we can't use xdr_encode_pages() as written: we need a variant
2281 * of it which would leave room in the 'tail' iovec.
2282 *
2283 * Both of these changes to the XDR layer would in fact be quite
2284 * minor, but I decided to leave them for a subsequent patch.
2285 */
2286static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2287 unsigned int pgbase, unsigned int pglen)
2288{
2289 struct nfs4_readlink args = {
2290 .fh = NFS_FH(inode),
2291 .pgbase = pgbase,
2292 .pglen = pglen,
2293 .pages = &page,
2294 };
f50c7000 2295 struct nfs4_readlink_res res;
1da177e4
LT		 2296 struct rpc_message msg = {
2297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2298 .rpc_argp = &args,
f50c7000 2299 .rpc_resp = &res,
1da177e4
LT		 2300 };
2301
cccef3b9 2302 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2303}
2304
2305static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2306 unsigned int pgbase, unsigned int pglen)
2307{
2308 struct nfs4_exception exception = { };
2309 int err;
2310 do {
2311 err = nfs4_handle_exception(NFS_SERVER(inode),
2312 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2313 &exception);
2314 } while (exception.retry);
2315 return err;
2316}
2317
1da177e4
LT		 2318/*
2319 * Got race?
2320 * We will need to arrange for the VFS layer to provide an atomic open.
2321 * Until then, this create/open method is prone to inefficiency and race
2322 * conditions due to the lookup, create, and open VFS calls from sys_open()
2323 * placed on the wire.
2324 *
2325 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2326 * The file will be opened again in the subsequent VFS open call
2327 * (nfs4_proc_file_open).
2328 *
2329 * The open for read will just hang around to be used by any process that
2330 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2331 */
2332
2333static int
2334nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2335 int flags, struct nameidata *nd)
1da177e4 2336{
ad389da7 2337 struct path path = {
4ac91378 2338 .mnt = nd->path.mnt,
ad389da7
TM		 2339 .dentry = dentry,
2340 };
1da177e4
LT		 2341 struct nfs4_state *state;
2342 struct rpc_cred *cred;
dc0b027d 2343 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2344 int status = 0;
2345
98a8e323 2346 cred = rpc_lookup_cred();
1da177e4
LT		 2347 if (IS_ERR(cred)) {
2348 status = PTR_ERR(cred);
2349 goto out;
2350 }
dc0b027d 2351 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2352 d_drop(dentry);
1da177e4
LT		 2353 if (IS_ERR(state)) {
2354 status = PTR_ERR(state);
659bfcd6 2355 goto out_putcred;
1da177e4 2356 }
d4d9cdcb 2357 d_add(dentry, igrab(state->inode));
d75340cc 2358 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2359 if (flags & O_EXCL) {
2360 struct nfs_fattr fattr;
659bfcd6 2361 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2362 if (status == 0)
65e4308d 2363 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2364 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2365 }
ad389da7 2366 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2367 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2368 else
dc0b027d 2369 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2370out_putcred:
2371 put_rpccred(cred);
1da177e4
LT		 2372out:
2373 return status;
2374}
2375
2376static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2377{
16e42959 2378 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2379 struct nfs_removeargs args = {
1da177e4 2380 .fh = NFS_FH(dir),
4fdc17b2
TM		 2381 .name.len = name->len,
2382 .name.name = name->name,
16e42959
TM		 2383 .bitmask = server->attr_bitmask,
2384 };
4fdc17b2 2385 struct nfs_removeres res = {
16e42959 2386 .server = server,
1da177e4 2387 };
1da177e4 2388 struct rpc_message msg = {
4fdc17b2
TM		 2389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2390 .rpc_argp = &args,
2391 .rpc_resp = &res,
1da177e4
LT		 2392 };
2393 int status;
2394
4fdc17b2 2395 nfs_fattr_init(&res.dir_attr);
cccef3b9 2396 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2397 if (status == 0) {
2398 update_changeattr(dir, &res.cinfo);
4fdc17b2 2399 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2400 }
1da177e4
LT		 2401 return status;
2402}
2403
2404static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2405{
2406 struct nfs4_exception exception = { };
2407 int err;
2408 do {
2409 err = nfs4_handle_exception(NFS_SERVER(dir),
2410 _nfs4_proc_remove(dir, name),
2411 &exception);
2412 } while (exception.retry);
2413 return err;
2414}
2415
e4eff1a6 2416static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2417{
e4eff1a6
TM		 2418 struct nfs_server *server = NFS_SERVER(dir);
2419 struct nfs_removeargs *args = msg->rpc_argp;
2420 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2421
a65318bf 2422 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2423 res->server = server;
1da177e4 2424 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2425}
2426
e4eff1a6 2427static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2428{
e4eff1a6
TM		 2429 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2430
472cfbd9 2431 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2432 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2433 return 0;
472cfbd9 2434 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2435 update_changeattr(dir, &res->cinfo);
2436 nfs_post_op_update_inode(dir, &res->dir_attr);
2437 return 1;
1da177e4
LT		 2438}
2439
2440static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2441 struct inode *new_dir, struct qstr *new_name)
2442{
6caf2c82 2443 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2444 struct nfs4_rename_arg arg = {
2445 .old_dir = NFS_FH(old_dir),
2446 .new_dir = NFS_FH(new_dir),
2447 .old_name = old_name,
2448 .new_name = new_name,
6caf2c82
TM		 2449 .bitmask = server->attr_bitmask,
2450 };
2451 struct nfs_fattr old_fattr, new_fattr;
2452 struct nfs4_rename_res res = {
2453 .server = server,
2454 .old_fattr = &old_fattr,
2455 .new_fattr = &new_fattr,
1da177e4 2456 };
1da177e4
LT		 2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2459 .rpc_argp = &arg,
2460 .rpc_resp = &res,
2461 };
2462 int status;
2463
6caf2c82
TM		 2464 nfs_fattr_init(res.old_fattr);
2465 nfs_fattr_init(res.new_fattr);
cccef3b9 2466 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2467
2468 if (!status) {
2469 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2470 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2471 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2472 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2473 }
2474 return status;
2475}
2476
2477static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2478 struct inode *new_dir, struct qstr *new_name)
2479{
2480 struct nfs4_exception exception = { };
2481 int err;
2482 do {
2483 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2484 _nfs4_proc_rename(old_dir, old_name,
2485 new_dir, new_name),
2486 &exception);
2487 } while (exception.retry);
2488 return err;
2489}
2490
2491static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2492{
91ba2eee 2493 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2494 struct nfs4_link_arg arg = {
2495 .fh = NFS_FH(inode),
2496 .dir_fh = NFS_FH(dir),
2497 .name = name,
91ba2eee
TM		 2498 .bitmask = server->attr_bitmask,
2499 };
2500 struct nfs_fattr fattr, dir_attr;
2501 struct nfs4_link_res res = {
2502 .server = server,
2503 .fattr = &fattr,
2504 .dir_attr = &dir_attr,
1da177e4 2505 };
1da177e4
LT		 2506 struct rpc_message msg = {
2507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2508 .rpc_argp = &arg,
91ba2eee 2509 .rpc_resp = &res,
1da177e4
LT		 2510 };
2511 int status;
2512
91ba2eee
TM		 2513 nfs_fattr_init(res.fattr);
2514 nfs_fattr_init(res.dir_attr);
cccef3b9 2515 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2516 if (!status) {
2517 update_changeattr(dir, &res.cinfo);
2518 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2519 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2520 }
1da177e4
LT		 2521
2522 return status;
2523}
2524
2525static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2526{
2527 struct nfs4_exception exception = { };
2528 int err;
2529 do {
2530 err = nfs4_handle_exception(NFS_SERVER(inode),
2531 _nfs4_proc_link(inode, dir, name),
2532 &exception);
2533 } while (exception.retry);
2534 return err;
2535}
2536
57dc9a57
TM		 2537struct nfs4_createdata {
2538 struct rpc_message msg;
2539 struct nfs4_create_arg arg;
2540 struct nfs4_create_res res;
2541 struct nfs_fh fh;
2542 struct nfs_fattr fattr;
2543 struct nfs_fattr dir_fattr;
2544};
2545
2546static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2547 struct qstr *name, struct iattr *sattr, u32 ftype)
2548{
2549 struct nfs4_createdata *data;
2550
2551 data = kzalloc(sizeof(*data), GFP_KERNEL);
2552 if (data != NULL) {
2553 struct nfs_server *server = NFS_SERVER(dir);
2554
2555 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2556 data->msg.rpc_argp = &data->arg;
2557 data->msg.rpc_resp = &data->res;
2558 data->arg.dir_fh = NFS_FH(dir);
2559 data->arg.server = server;
2560 data->arg.name = name;
2561 data->arg.attrs = sattr;
2562 data->arg.ftype = ftype;
2563 data->arg.bitmask = server->attr_bitmask;
2564 data->res.server = server;
2565 data->res.fh = &data->fh;
2566 data->res.fattr = &data->fattr;
2567 data->res.dir_fattr = &data->dir_fattr;
2568 nfs_fattr_init(data->res.fattr);
2569 nfs_fattr_init(data->res.dir_fattr);
2570 }
2571 return data;
2572}
2573
2574static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2575{
cccef3b9
AA		 2576 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2577 &data->arg, &data->res, 1);
57dc9a57
TM		 2578 if (status == 0) {
2579 update_changeattr(dir, &data->res.dir_cinfo);
2580 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2581 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2582 }
2583 return status;
2584}
2585
2586static void nfs4_free_createdata(struct nfs4_createdata *data)
2587{
2588 kfree(data);
2589}
2590
4f390c15 2591static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2592 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2593{
57dc9a57
TM		 2594 struct nfs4_createdata *data;
2595 int status = -ENAMETOOLONG;
1da177e4 2596
94a6d753 2597 if (len > NFS4_MAXPATHLEN)
57dc9a57 2598 goto out;
4f390c15 2599
57dc9a57
TM		 2600 status = -ENOMEM;
2601 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2602 if (data == NULL)
2603 goto out;
2604
2605 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2606 data->arg.u.symlink.pages = &page;
2607 data->arg.u.symlink.len = len;
1da177e4 2608
57dc9a57
TM		 2609 status = nfs4_do_create(dir, dentry, data);
2610
2611 nfs4_free_createdata(data);
2612out:
1da177e4
LT		 2613 return status;
2614}
2615
4f390c15 2616static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2617 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2618{
2619 struct nfs4_exception exception = { };
2620 int err;
2621 do {
2622 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2623 _nfs4_proc_symlink(dir, dentry, page,
2624 len, sattr),
1da177e4
LT		 2625 &exception);
2626 } while (exception.retry);
2627 return err;
2628}
2629
2630static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2631 struct iattr *sattr)
2632{
57dc9a57
TM		 2633 struct nfs4_createdata *data;
2634 int status = -ENOMEM;
1da177e4 2635
57dc9a57
TM		 2636 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2637 if (data == NULL)
2638 goto out;
2639
2640 status = nfs4_do_create(dir, dentry, data);
2641
2642 nfs4_free_createdata(data);
2643out:
1da177e4
LT		 2644 return status;
2645}
2646
2647static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2648 struct iattr *sattr)
2649{
2650 struct nfs4_exception exception = { };
2651 int err;
2652 do {
2653 err = nfs4_handle_exception(NFS_SERVER(dir),
2654 _nfs4_proc_mkdir(dir, dentry, sattr),
2655 &exception);
2656 } while (exception.retry);
2657 return err;
2658}
2659
2660static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2661 u64 cookie, struct page *page, unsigned int count, int plus)
2662{
2663 struct inode *dir = dentry->d_inode;
2664 struct nfs4_readdir_arg args = {
2665 .fh = NFS_FH(dir),
2666 .pages = &page,
2667 .pgbase = 0,
2668 .count = count,
a65318bf 2669 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2670 };
2671 struct nfs4_readdir_res res;
2672 struct rpc_message msg = {
2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2674 .rpc_argp = &args,
2675 .rpc_resp = &res,
2676 .rpc_cred = cred,
2677 };
2678 int status;
2679
3110ff80 2680 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2681 dentry->d_parent->d_name.name,
2682 dentry->d_name.name,
2683 (unsigned long long)cookie);
1da177e4
LT		 2684 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2685 res.pgbase = args.pgbase;
cccef3b9 2686 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2687 if (status == 0)
2688 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2689
2690 nfs_invalidate_atime(dir);
2691
3110ff80 2692 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2693 return status;
2694}
2695
2696static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2697 u64 cookie, struct page *page, unsigned int count, int plus)
2698{
2699 struct nfs4_exception exception = { };
2700 int err;
2701 do {
2702 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2703 _nfs4_proc_readdir(dentry, cred, cookie,
2704 page, count, plus),
2705 &exception);
2706 } while (exception.retry);
2707 return err;
2708}
2709
2710static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2711 struct iattr *sattr, dev_t rdev)
2712{
57dc9a57
TM		 2713 struct nfs4_createdata *data;
2714 int mode = sattr->ia_mode;
2715 int status = -ENOMEM;
1da177e4
LT		 2716
2717 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2718 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2719
2720 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2721 if (data == NULL)
2722 goto out;
2723
1da177e4 2724 if (S_ISFIFO(mode))
57dc9a57 2725 data->arg.ftype = NF4FIFO;
1da177e4 2726 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2727 data->arg.ftype = NF4BLK;
2728 data->arg.u.device.specdata1 = MAJOR(rdev);
2729 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2730 }
2731 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2732 data->arg.ftype = NF4CHR;
2733 data->arg.u.device.specdata1 = MAJOR(rdev);
2734 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2735 }
1da177e4 2736
57dc9a57
TM		 2737 status = nfs4_do_create(dir, dentry, data);
2738
2739 nfs4_free_createdata(data);
2740out:
1da177e4
LT		 2741 return status;
2742}
2743
2744static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2745 struct iattr *sattr, dev_t rdev)
2746{
2747 struct nfs4_exception exception = { };
2748 int err;
2749 do {
2750 err = nfs4_handle_exception(NFS_SERVER(dir),
2751 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2752 &exception);
2753 } while (exception.retry);
2754 return err;
2755}
2756
2757static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2758 struct nfs_fsstat *fsstat)
2759{
2760 struct nfs4_statfs_arg args = {
2761 .fh = fhandle,
2762 .bitmask = server->attr_bitmask,
2763 };
24ad148a
BH		 2764 struct nfs4_statfs_res res = {
2765 .fsstat = fsstat,
2766 };
1da177e4
LT		 2767 struct rpc_message msg = {
2768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2769 .rpc_argp = &args,
24ad148a 2770 .rpc_resp = &res,
1da177e4
LT		 2771 };
2772
0e574af1 2773 nfs_fattr_init(fsstat->fattr);
cccef3b9 2774 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2775}
2776
2777static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2778{
2779 struct nfs4_exception exception = { };
2780 int err;
2781 do {
2782 err = nfs4_handle_exception(server,
2783 _nfs4_proc_statfs(server, fhandle, fsstat),
2784 &exception);
2785 } while (exception.retry);
2786 return err;
2787}
2788
2789static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2790 struct nfs_fsinfo *fsinfo)
2791{
2792 struct nfs4_fsinfo_arg args = {
2793 .fh = fhandle,
2794 .bitmask = server->attr_bitmask,
2795 };
3dda5e43
BH		 2796 struct nfs4_fsinfo_res res = {
2797 .fsinfo = fsinfo,
2798 };
1da177e4
LT		 2799 struct rpc_message msg = {
2800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2801 .rpc_argp = &args,
3dda5e43 2802 .rpc_resp = &res,
1da177e4
LT		 2803 };
2804
cccef3b9 2805 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2806}
2807
2808static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2809{
2810 struct nfs4_exception exception = { };
2811 int err;
2812
2813 do {
2814 err = nfs4_handle_exception(server,
2815 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2816 &exception);
2817 } while (exception.retry);
2818 return err;
2819}
2820
2821static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2822{
0e574af1 2823 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2824 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2825}
2826
2827static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2828 struct nfs_pathconf *pathconf)
2829{
2830 struct nfs4_pathconf_arg args = {
2831 .fh = fhandle,
2832 .bitmask = server->attr_bitmask,
2833 };
d45b2989
BH		 2834 struct nfs4_pathconf_res res = {
2835 .pathconf = pathconf,
2836 };
1da177e4
LT		 2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2839 .rpc_argp = &args,
d45b2989 2840 .rpc_resp = &res,
1da177e4
LT		 2841 };
2842
2843 /* None of the pathconf attributes are mandatory to implement */
2844 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2845 memset(pathconf, 0, sizeof(*pathconf));
2846 return 0;
2847 }
2848
0e574af1 2849 nfs_fattr_init(pathconf->fattr);
cccef3b9 2850 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2851}
2852
2853static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2854 struct nfs_pathconf *pathconf)
2855{
2856 struct nfs4_exception exception = { };
2857 int err;
2858
2859 do {
2860 err = nfs4_handle_exception(server,
2861 _nfs4_proc_pathconf(server, fhandle, pathconf),
2862 &exception);
2863 } while (exception.retry);
2864 return err;
2865}
2866
ec06c096 2867static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2868{
ec06c096 2869 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2870
f11c88af
AA		 2871 dprintk("--> %s\n", __func__);
2872
2873 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2874 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2875
9e33bed5 2876 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2877 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2878 return -EAGAIN;
1da177e4 2879 }
8850df99
TM		 2880
2881 nfs_invalidate_atime(data->inode);
1da177e4 2882 if (task->tk_status > 0)
ec06c096
TM		 2883 renew_lease(server, data->timestamp);
2884 return 0;
1da177e4
LT		 2885}
2886
bdc7f021 2887static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2888{
1da177e4 2889 data->timestamp = jiffies;
bdc7f021 2890 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2891}
2892
788e7a89 2893static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2894{
1da177e4
LT		 2895 struct inode *inode = data->inode;
2896
def6ed7e
AA		 2897 /* slot is freed in nfs_writeback_done */
2898 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2899 task->tk_status);
2900
9e33bed5 2901 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2902 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2903 return -EAGAIN;
1da177e4 2904 }
4f9838c7 2905 if (task->tk_status >= 0) {
1da177e4 2906 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2907 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2908 }
788e7a89 2909 return 0;
1da177e4
LT		 2910}
2911
bdc7f021 2912static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2913{
bdc7f021
TM		 2914 struct nfs_server *server = NFS_SERVER(data->inode);
2915
a65318bf 2916 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2917 data->res.server = server;
1da177e4
LT		 2918 data->timestamp = jiffies;
2919
bdc7f021 2920 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2921}
2922
788e7a89 2923static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2924{
1da177e4
LT		 2925 struct inode *inode = data->inode;
2926
21d9a851
AA		 2927 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2928 task->tk_status);
9e33bed5 2929 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 2930 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2931 return -EAGAIN;
1da177e4 2932 }
21d9a851
AA		 2933 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2934 &data->res.seq_res);
9e08a3c5 2935 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2936 return 0;
1da177e4
LT		 2937}
2938
bdc7f021 2939static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2940{
788e7a89 2941 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2942
a65318bf 2943 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2944 data->res.server = server;
bdc7f021 2945 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2946}
2947
2948/*
2949 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2950 * standalone procedure for queueing an asynchronous RENEW.
2951 */
963d8fe5 2952static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2953{
adfa6f98 2954 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2955 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2956
2957 if (task->tk_status < 0) {
95baa25c
TM		 2958 /* Unless we're shutting down, schedule state recovery! */
2959 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2960 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2961 return;
2962 }
2963 spin_lock(&clp->cl_lock);
2964 if (time_before(clp->cl_last_renewal,timestamp))
2965 clp->cl_last_renewal = timestamp;
2966 spin_unlock(&clp->cl_lock);
2967}
2968
963d8fe5
TM		 2969static const struct rpc_call_ops nfs4_renew_ops = {
2970 .rpc_call_done = nfs4_renew_done,
2971};
2972
adfa6f98 2973int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2974{
2975 struct rpc_message msg = {
2976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2977 .rpc_argp = clp,
b4454fe1 2978 .rpc_cred = cred,
1da177e4
LT		 2979 };
2980
2981 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2982 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2983}
2984
adfa6f98 2985int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2986{
2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2989 .rpc_argp = clp,
b4454fe1 2990 .rpc_cred = cred,
1da177e4
LT		 2991 };
2992 unsigned long now = jiffies;
2993 int status;
2994
2995 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2996 if (status < 0)
2997 return status;
2998 spin_lock(&clp->cl_lock);
2999 if (time_before(clp->cl_last_renewal,now))
3000 clp->cl_last_renewal = now;
3001 spin_unlock(&clp->cl_lock);
3002 return 0;
3003}
3004
aa1870af
BF		 3005static inline int nfs4_server_supports_acls(struct nfs_server *server)
3006{
3007 return (server->caps & NFS_CAP_ACLS)
3008 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3009 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3010}
3011
3012/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3013 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3014 * the stack.
3015 */
3016#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3017
3018static void buf_to_pages(const void *buf, size_t buflen,
3019 struct page **pages, unsigned int *pgbase)
3020{
3021 const void *p = buf;
3022
3023 *pgbase = offset_in_page(buf);
3024 p -= *pgbase;
3025 while (p < buf + buflen) {
3026 *(pages++) = virt_to_page(p);
3027 p += PAGE_CACHE_SIZE;
3028 }
3029}
3030
e50a1c2e
BF		 3031struct nfs4_cached_acl {
3032 int cached;
3033 size_t len;
3e9d4154 3034 char data[0];
e50a1c2e
BF		 3035};
3036
3037static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3038{
3039 struct nfs_inode *nfsi = NFS_I(inode);
3040
3041 spin_lock(&inode->i_lock);
3042 kfree(nfsi->nfs4_acl);
3043 nfsi->nfs4_acl = acl;
3044 spin_unlock(&inode->i_lock);
3045}
3046
3047static void nfs4_zap_acl_attr(struct inode *inode)
3048{
3049 nfs4_set_cached_acl(inode, NULL);
3050}
3051
3052static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3053{
3054 struct nfs_inode *nfsi = NFS_I(inode);
3055 struct nfs4_cached_acl *acl;
3056 int ret = -ENOENT;
3057
3058 spin_lock(&inode->i_lock);
3059 acl = nfsi->nfs4_acl;
3060 if (acl == NULL)
3061 goto out;
3062 if (buf == NULL) /* user is just asking for length */
3063 goto out_len;
3064 if (acl->cached == 0)
3065 goto out;
3066 ret = -ERANGE; /* see getxattr(2) man page */
3067 if (acl->len > buflen)
3068 goto out;
3069 memcpy(buf, acl->data, acl->len);
3070out_len:
3071 ret = acl->len;
3072out:
3073 spin_unlock(&inode->i_lock);
3074 return ret;
3075}
3076
3077static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3078{
3079 struct nfs4_cached_acl *acl;
3080
3081 if (buf && acl_len <= PAGE_SIZE) {
3082 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3083 if (acl == NULL)
3084 goto out;
3085 acl->cached = 1;
3086 memcpy(acl->data, buf, acl_len);
3087 } else {
3088 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3089 if (acl == NULL)
3090 goto out;
3091 acl->cached = 0;
3092 }
3093 acl->len = acl_len;
3094out:
3095 nfs4_set_cached_acl(inode, acl);
3096}
3097
16b4289c 3098static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3099{
aa1870af
BF		 3100 struct page *pages[NFS4ACL_MAXPAGES];
3101 struct nfs_getaclargs args = {
3102 .fh = NFS_FH(inode),
3103 .acl_pages = pages,
3104 .acl_len = buflen,
3105 };
663c79b3
BH		 3106 struct nfs_getaclres res = {
3107 .acl_len = buflen,
3108 };
e50a1c2e 3109 void *resp_buf;
aa1870af
BF		 3110 struct rpc_message msg = {
3111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3112 .rpc_argp = &args,
663c79b3 3113 .rpc_resp = &res,
aa1870af 3114 };
e50a1c2e 3115 struct page *localpage = NULL;
aa1870af
BF		 3116 int ret;
3117
e50a1c2e
BF		 3118 if (buflen < PAGE_SIZE) {
3119 /* As long as we're doing a round trip to the server anyway,
3120 * let's be prepared for a page of acl data. */
3121 localpage = alloc_page(GFP_KERNEL);
3122 resp_buf = page_address(localpage);
3123 if (localpage == NULL)
3124 return -ENOMEM;
3125 args.acl_pages[0] = localpage;
3126 args.acl_pgbase = 0;
663c79b3 3127 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3128 } else {
3129 resp_buf = buf;
3130 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3131 }
cccef3b9 3132 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3133 if (ret)
3134 goto out_free;
663c79b3
BH		 3135 if (res.acl_len > args.acl_len)
3136 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3137 else
663c79b3 3138 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3139 if (buf) {
3140 ret = -ERANGE;
663c79b3 3141 if (res.acl_len > buflen)
e50a1c2e
BF		 3142 goto out_free;
3143 if (localpage)
663c79b3 3144 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3145 }
663c79b3 3146 ret = res.acl_len;
e50a1c2e
BF		 3147out_free:
3148 if (localpage)
3149 __free_page(localpage);
aa1870af
BF		 3150 return ret;
3151}
3152
16b4289c
TM		 3153static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3154{
3155 struct nfs4_exception exception = { };
3156 ssize_t ret;
3157 do {
3158 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3159 if (ret >= 0)
3160 break;
3161 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3162 } while (exception.retry);
3163 return ret;
3164}
3165
e50a1c2e
BF		 3166static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3167{
3168 struct nfs_server *server = NFS_SERVER(inode);
3169 int ret;
3170
3171 if (!nfs4_server_supports_acls(server))
3172 return -EOPNOTSUPP;
3173 ret = nfs_revalidate_inode(server, inode);
3174 if (ret < 0)
3175 return ret;
f41f7418
TM		 3176 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3177 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3178 ret = nfs4_read_cached_acl(inode, buf, buflen);
3179 if (ret != -ENOENT)
3180 return ret;
3181 return nfs4_get_acl_uncached(inode, buf, buflen);
3182}
3183
16b4289c 3184static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3185{
3186 struct nfs_server *server = NFS_SERVER(inode);
3187 struct page *pages[NFS4ACL_MAXPAGES];
3188 struct nfs_setaclargs arg = {
3189 .fh = NFS_FH(inode),
3190 .acl_pages = pages,
3191 .acl_len = buflen,
3192 };
73c403a9 3193 struct nfs_setaclres res;
4b580ee3
BF		 3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3196 .rpc_argp = &arg,
73c403a9 3197 .rpc_resp = &res,
4b580ee3
BF		 3198 };
3199 int ret;
3200
3201 if (!nfs4_server_supports_acls(server))
3202 return -EOPNOTSUPP;
642ac549 3203 nfs_inode_return_delegation(inode);
4b580ee3 3204 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3205 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3206 nfs_access_zap_cache(inode);
3207 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3208 return ret;
3209}
3210
16b4289c
TM		 3211static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3212{
3213 struct nfs4_exception exception = { };
3214 int err;
3215 do {
3216 err = nfs4_handle_exception(NFS_SERVER(inode),
3217 __nfs4_proc_set_acl(inode, buf, buflen),
3218 &exception);
3219 } while (exception.retry);
3220 return err;
3221}
3222
1da177e4 3223static int
8328d59f 3224_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3225{
1da177e4
LT		 3226 if (!clp || task->tk_status >= 0)
3227 return 0;
3228 switch(task->tk_status) {
9e33bed5
TM		 3229 case -NFS4ERR_ADMIN_REVOKED:
3230 case -NFS4ERR_BAD_STATEID:
3231 case -NFS4ERR_OPENMODE:
3232 if (state == NULL)
3233 break;
3234 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3235 case -NFS4ERR_STALE_CLIENTID:
3236 case -NFS4ERR_STALE_STATEID:
3237 case -NFS4ERR_EXPIRED:
5d00837b 3238 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3239 nfs4_schedule_state_recovery(clp);
e005e804 3240 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3241 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3242 task->tk_status = 0;
3243 return -EAGAIN;
1da177e4 3244 case -NFS4ERR_DELAY:
8328d59f
AA		 3245 if (server)
3246 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3247 case -NFS4ERR_GRACE:
1da177e4
LT		 3248 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3249 task->tk_status = 0;
3250 return -EAGAIN;
3251 case -NFS4ERR_OLD_STATEID:
3252 task->tk_status = 0;
3253 return -EAGAIN;
3254 }
3255 task->tk_status = nfs4_map_errors(task->tk_status);
3256 return 0;
3257}
3258
8328d59f
AA		 3259static int
3260nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3261{
3262 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3263}
3264
adfa6f98 3265int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3266{
3267 nfs4_verifier sc_verifier;
3268 struct nfs4_setclientid setclientid = {
3269 .sc_verifier = &sc_verifier,
3270 .sc_prog = program,
3271 };
3272 struct rpc_message msg = {
3273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3274 .rpc_argp = &setclientid,
3275 .rpc_resp = clp,
286d7d6a 3276 .rpc_cred = cred,
1da177e4 3277 };
bc4785cd 3278 __be32 *p;
1da177e4
LT		 3279 int loop = 0;
3280 int status;
3281
bc4785cd 3282 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3283 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3284 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3285
3286 for(;;) {
3287 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3288 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3289 clp->cl_ipaddr,
3290 rpc_peeraddr2str(clp->cl_rpcclient,
3291 RPC_DISPLAY_ADDR),
69dd716c
TM		 3292 rpc_peeraddr2str(clp->cl_rpcclient,
3293 RPC_DISPLAY_PROTO),
78ea323b 3294 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3295 clp->cl_id_uniquifier);
3296 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3297 sizeof(setclientid.sc_netid),
3298 rpc_peeraddr2str(clp->cl_rpcclient,
3299 RPC_DISPLAY_NETID));
1da177e4 3300 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3301 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3302 clp->cl_ipaddr, port >> 8, port & 255);
3303
3304 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3305 if (status != -NFS4ERR_CLID_INUSE)
3306 break;
3307 if (signalled())
3308 break;
3309 if (loop++ & 1)
3310 ssleep(clp->cl_lease_time + 1);
3311 else
3312 if (++clp->cl_id_uniquifier == 0)
3313 break;
3314 }
3315 return status;
3316}
3317
adfa6f98 3318static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3319{
3320 struct nfs_fsinfo fsinfo;
3321 struct rpc_message msg = {
3322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3323 .rpc_argp = clp,
3324 .rpc_resp = &fsinfo,
286d7d6a 3325 .rpc_cred = cred,
1da177e4
LT		 3326 };
3327 unsigned long now;
3328 int status;
3329
3330 now = jiffies;
3331 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3332 if (status == 0) {
3333 spin_lock(&clp->cl_lock);
3334 clp->cl_lease_time = fsinfo.lease_time * HZ;
3335 clp->cl_last_renewal = now;
3336 spin_unlock(&clp->cl_lock);
3337 }
3338 return status;
3339}
3340
adfa6f98 3341int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3342{
77e03677 3343 long timeout = 0;
51581f3b
TM		 3344 int err;
3345 do {
3346 err = _nfs4_proc_setclientid_confirm(clp, cred);
3347 switch (err) {
3348 case 0:
3349 return err;
3350 case -NFS4ERR_RESOURCE:
3351 /* The IBM lawyers misread another document! */
3352 case -NFS4ERR_DELAY:
3353 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3354 }
3355 } while (err == 0);
3356 return err;
3357}
3358
fe650407
TM		 3359struct nfs4_delegreturndata {
3360 struct nfs4_delegreturnargs args;
fa178f29 3361 struct nfs4_delegreturnres res;
fe650407
TM		 3362 struct nfs_fh fh;
3363 nfs4_stateid stateid;
26e976a8 3364 unsigned long timestamp;
fa178f29 3365 struct nfs_fattr fattr;
fe650407
TM		 3366 int rpc_status;
3367};
3368
fe650407
TM		 3369static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3370{
3371 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3372
3373 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3374 task->tk_status);
3375
fe650407 3376 data->rpc_status = task->tk_status;
26e976a8 3377 if (data->rpc_status == 0)
fa178f29 3378 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3379}
3380
3381static void nfs4_delegreturn_release(void *calldata)
3382{
fe650407
TM		 3383 kfree(calldata);
3384}
3385
938e1010
AA		 3386#if defined(CONFIG_NFS_V4_1)
3387static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3388{
3389 struct nfs4_delegreturndata *d_data;
3390
3391 d_data = (struct nfs4_delegreturndata *)data;
3392
3393 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3394 &d_data->args.seq_args,
3395 &d_data->res.seq_res, 1, task))
3396 return;
3397 rpc_call_start(task);
3398}
3399#endif /* CONFIG_NFS_V4_1 */
3400
c8d149f3 3401static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3402#if defined(CONFIG_NFS_V4_1)
3403 .rpc_call_prepare = nfs4_delegreturn_prepare,
3404#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3405 .rpc_call_done = nfs4_delegreturn_done,
3406 .rpc_release = nfs4_delegreturn_release,
3407};
3408
e6f81075 3409static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3410{
3411 struct nfs4_delegreturndata *data;
fa178f29 3412 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3413 struct rpc_task *task;
5138fde0
TM		 3414 struct rpc_message msg = {
3415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3416 .rpc_cred = cred,
3417 };
c970aa85
TM		 3418 struct rpc_task_setup task_setup_data = {
3419 .rpc_client = server->client,
5138fde0 3420 .rpc_message = &msg,
c970aa85
TM		 3421 .callback_ops = &nfs4_delegreturn_ops,
3422 .flags = RPC_TASK_ASYNC,
3423 };
e6f81075 3424 int status = 0;
fe650407 3425
938e1010 3426 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3427 if (data == NULL)
3428 return -ENOMEM;
3429 data->args.fhandle = &data->fh;
3430 data->args.stateid = &data->stateid;
fa178f29 3431 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3432 nfs_copy_fh(&data->fh, NFS_FH(inode));
3433 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3434 data->res.fattr = &data->fattr;
3435 data->res.server = server;
5f7dbd5c 3436 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3437 nfs_fattr_init(data->res.fattr);
26e976a8 3438 data->timestamp = jiffies;
fe650407
TM		 3439 data->rpc_status = 0;
3440
c970aa85 3441 task_setup_data.callback_data = data;
5138fde0
TM		 3442 msg.rpc_argp = &data->args,
3443 msg.rpc_resp = &data->res,
c970aa85 3444 task = rpc_run_task(&task_setup_data);
7a1218a2 3445 if (IS_ERR(task))
fe650407 3446 return PTR_ERR(task);
e6f81075
TM		 3447 if (!issync)
3448 goto out;
fe650407 3449 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3450 if (status != 0)
3451 goto out;
3452 status = data->rpc_status;
3453 if (status != 0)
3454 goto out;
3455 nfs_refresh_inode(inode, &data->fattr);
3456out:
e6b3c4db 3457 rpc_put_task(task);
fe650407 3458 return status;
1da177e4
LT		 3459}
3460
e6f81075 3461int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3462{
3463 struct nfs_server *server = NFS_SERVER(inode);
3464 struct nfs4_exception exception = { };
3465 int err;
3466 do {
e6f81075 3467 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3468 switch (err) {
3469 case -NFS4ERR_STALE_STATEID:
3470 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3471 case 0:
3472 return 0;
3473 }
3474 err = nfs4_handle_exception(server, err, &exception);
3475 } while (exception.retry);
3476 return err;
3477}
3478
3479#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3480#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3481
3482/*
3483 * sleep, with exponential backoff, and retry the LOCK operation.
3484 */
3485static unsigned long
3486nfs4_set_lock_task_retry(unsigned long timeout)
3487{
150030b7 3488 schedule_timeout_killable(timeout);
1da177e4
LT		 3489 timeout <<= 1;
3490 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3491 return NFS4_LOCK_MAXTIMEOUT;
3492 return timeout;
3493}
3494
1da177e4
LT		 3495static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3496{
3497 struct inode *inode = state->inode;
3498 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3499 struct nfs_client *clp = server->nfs_client;
911d1aaf 3500 struct nfs_lockt_args arg = {
1da177e4 3501 .fh = NFS_FH(inode),
911d1aaf 3502 .fl = request,
1da177e4 3503 };
911d1aaf
TM		 3504 struct nfs_lockt_res res = {
3505 .denied = request,
1da177e4
LT		 3506 };
3507 struct rpc_message msg = {
3508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3509 .rpc_argp = &arg,
3510 .rpc_resp = &res,
3511 .rpc_cred = state->owner->so_cred,
3512 };
1da177e4
LT		 3513 struct nfs4_lock_state *lsp;
3514 int status;
3515
911d1aaf 3516 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3517 status = nfs4_set_lock_state(state, request);
3518 if (status != 0)
3519 goto out;
3520 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3521 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3522 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3523 switch (status) {
3524 case 0:
3525 request->fl_type = F_UNLCK;
3526 break;
3527 case -NFS4ERR_DENIED:
3528 status = 0;
1da177e4 3529 }
70cc6487 3530 request->fl_ops->fl_release_private(request);
8d0a8a9d 3531out:
1da177e4
LT		 3532 return status;
3533}
3534
3535static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3536{
3537 struct nfs4_exception exception = { };
3538 int err;
3539
3540 do {
3541 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3542 _nfs4_proc_getlk(state, cmd, request),
3543 &exception);
3544 } while (exception.retry);
3545 return err;
3546}
3547
3548static int do_vfs_lock(struct file *file, struct file_lock *fl)
3549{
3550 int res = 0;
3551 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3552 case FL_POSIX:
3553 res = posix_lock_file_wait(file, fl);
3554 break;
3555 case FL_FLOCK:
3556 res = flock_lock_file_wait(file, fl);
3557 break;
3558 default:
3559 BUG();
3560 }
1da177e4
LT		 3561 return res;
3562}
3563
faf5f49c 3564struct nfs4_unlockdata {
911d1aaf
TM		 3565 struct nfs_locku_args arg;
3566 struct nfs_locku_res res;
faf5f49c
TM		 3567 struct nfs4_lock_state *lsp;
3568 struct nfs_open_context *ctx;
911d1aaf
TM		 3569 struct file_lock fl;
3570 const struct nfs_server *server;
26e976a8 3571 unsigned long timestamp;
faf5f49c
TM		 3572};
3573
911d1aaf
TM		 3574static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3575 struct nfs_open_context *ctx,
3576 struct nfs4_lock_state *lsp,
3577 struct nfs_seqid *seqid)
3578{
3579 struct nfs4_unlockdata *p;
3580 struct inode *inode = lsp->ls_state->inode;
3581
a893693c 3582 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3583 if (p == NULL)
3584 return NULL;
3585 p->arg.fh = NFS_FH(inode);
3586 p->arg.fl = &p->fl;
3587 p->arg.seqid = seqid;
c1d51931 3588 p->res.seqid = seqid;
5f7dbd5c 3589 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3590 p->arg.stateid = &lsp->ls_stateid;
3591 p->lsp = lsp;
3592 atomic_inc(&lsp->ls_count);
3593 /* Ensure we don't close file until we're done freeing locks! */
3594 p->ctx = get_nfs_open_context(ctx);
3595 memcpy(&p->fl, fl, sizeof(p->fl));
3596 p->server = NFS_SERVER(inode);
3597 return p;
3598}
3599
06f814a3 3600static void nfs4_locku_release_calldata(void *data)
faf5f49c 3601{
963d8fe5 3602 struct nfs4_unlockdata *calldata = data;
911d1aaf 3603 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3604 nfs4_put_lock_state(calldata->lsp);
3605 put_nfs_open_context(calldata->ctx);
3606 kfree(calldata);
faf5f49c
TM		 3607}
3608
963d8fe5 3609static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3610{
963d8fe5 3611 struct nfs4_unlockdata *calldata = data;
faf5f49c 3612
a893693c
AA		 3613 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3614 task->tk_status);
06f814a3
TM		 3615 if (RPC_ASSASSINATED(task))
3616 return;
faf5f49c
TM		 3617 switch (task->tk_status) {
3618 case 0:
3619 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3620 calldata->res.stateid.data,
faf5f49c 3621 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3622 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3623 break;
9e33bed5
TM		 3624 case -NFS4ERR_BAD_STATEID:
3625 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3626 case -NFS4ERR_STALE_STATEID:
3627 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3628 break;
3629 default:
9e33bed5 3630 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3631 nfs4_restart_rpc(task,
3632 calldata->server->nfs_client);
faf5f49c 3633 }
a893693c
AA		 3634 nfs4_sequence_free_slot(calldata->server->nfs_client,
3635 &calldata->res.seq_res);
faf5f49c
TM		 3636}
3637
4ce70ada 3638static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3639{
4ce70ada 3640 struct nfs4_unlockdata *calldata = data;
faf5f49c 3641
911d1aaf 3642 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3643 return;
3644 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3645 /* Note: exit _without_ running nfs4_locku_done */
3646 task->tk_action = NULL;
faf5f49c
TM		 3647 return;
3648 }
26e976a8 3649 calldata->timestamp = jiffies;
a893693c
AA		 3650 if (nfs4_setup_sequence(calldata->server->nfs_client,
3651 &calldata->arg.seq_args,
3652 &calldata->res.seq_res, 1, task))
3653 return;
5138fde0 3654 rpc_call_start(task);
faf5f49c
TM		 3655}
3656
963d8fe5 3657static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3658 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3659 .rpc_call_done = nfs4_locku_done,
06f814a3 3660 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3661};
3662
a5d16a4d
TM		 3663static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3664 struct nfs_open_context *ctx,
3665 struct nfs4_lock_state *lsp,
3666 struct nfs_seqid *seqid)
3667{
3668 struct nfs4_unlockdata *data;
5138fde0
TM		 3669 struct rpc_message msg = {
3670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3671 .rpc_cred = ctx->cred,
3672 };
c970aa85
TM		 3673 struct rpc_task_setup task_setup_data = {
3674 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3675 .rpc_message = &msg,
c970aa85 3676 .callback_ops = &nfs4_locku_ops,
101070ca 3677 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3678 .flags = RPC_TASK_ASYNC,
3679 };
a5d16a4d 3680
137d6aca
FF		 3681 /* Ensure this is an unlock - when canceling a lock, the
3682 * canceled lock is passed in, and it won't be an unlock.
3683 */
3684 fl->fl_type = F_UNLCK;
3685
a5d16a4d
TM		 3686 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3687 if (data == NULL) {
3688 nfs_free_seqid(seqid);
3689 return ERR_PTR(-ENOMEM);
3690 }
3691
5138fde0
TM		 3692 msg.rpc_argp = &data->arg,
3693 msg.rpc_resp = &data->res,
c970aa85
TM		 3694 task_setup_data.callback_data = data;
3695 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3696}
3697
faf5f49c
TM		 3698static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3699{
19e03c57 3700 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3701 struct nfs_seqid *seqid;
1da177e4 3702 struct nfs4_lock_state *lsp;
06f814a3
TM		 3703 struct rpc_task *task;
3704 int status = 0;
536ff0f8 3705 unsigned char fl_flags = request->fl_flags;
faf5f49c 3706
8d0a8a9d 3707 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3708 /* Unlock _before_ we do the RPC call */
3709 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3710 down_read(&nfsi->rwsem);
3711 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3712 up_read(&nfsi->rwsem);
9b073574 3713 goto out;
19e03c57
TM		 3714 }
3715 up_read(&nfsi->rwsem);
8d0a8a9d 3716 if (status != 0)
9b073574
TM		 3717 goto out;
3718 /* Is this a delegated lock? */
3719 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3720 goto out;
8d0a8a9d 3721 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3722 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3723 status = -ENOMEM;
911d1aaf 3724 if (seqid == NULL)
9b073574 3725 goto out;
cd3758e3 3726 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3727 status = PTR_ERR(task);
3728 if (IS_ERR(task))
9b073574 3729 goto out;
a5d16a4d 3730 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3731 rpc_put_task(task);
9b073574 3732out:
536ff0f8 3733 request->fl_flags = fl_flags;
1da177e4
LT		 3734 return status;
3735}
3736
a5d16a4d
TM		 3737struct nfs4_lockdata {
3738 struct nfs_lock_args arg;
3739 struct nfs_lock_res res;
3740 struct nfs4_lock_state *lsp;
3741 struct nfs_open_context *ctx;
3742 struct file_lock fl;
26e976a8 3743 unsigned long timestamp;
a5d16a4d
TM		 3744 int rpc_status;
3745 int cancelled;
66179efe 3746 struct nfs_server *server;
a5d16a4d
TM		 3747};
3748
3749static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3750 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3751{
a5d16a4d
TM		 3752 struct nfs4_lockdata *p;
3753 struct inode *inode = lsp->ls_state->inode;
1da177e4 3754 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3755
3756 p = kzalloc(sizeof(*p), GFP_KERNEL);
3757 if (p == NULL)
3758 return NULL;
3759
3760 p->arg.fh = NFS_FH(inode);
3761 p->arg.fl = &p->fl;
2f74c0a0
TM		 3762 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3763 if (p->arg.open_seqid == NULL)
3764 goto out_free;
a5d16a4d
TM		 3765 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3766 if (p->arg.lock_seqid == NULL)
2f74c0a0 3767 goto out_free_seqid;
a5d16a4d 3768 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3769 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3770 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3771 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3772 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3773 p->lsp = lsp;
66179efe 3774 p->server = server;
a5d16a4d
TM		 3775 atomic_inc(&lsp->ls_count);
3776 p->ctx = get_nfs_open_context(ctx);
3777 memcpy(&p->fl, fl, sizeof(p->fl));
3778 return p;
2f74c0a0
TM		 3779out_free_seqid:
3780 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3781out_free:
3782 kfree(p);
3783 return NULL;
3784}
3785
3786static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3787{
3788 struct nfs4_lockdata *data = calldata;
3789 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3790
3110ff80 3791 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3792 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3793 return;
a5d16a4d
TM		 3794 /* Do we need to do an open_to_lock_owner? */
3795 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3796 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3797 return;
a5d16a4d
TM		 3798 data->arg.open_stateid = &state->stateid;
3799 data->arg.new_lock_owner = 1;
c1d51931 3800 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3801 } else
3802 data->arg.new_lock_owner = 0;
26e976a8 3803 data->timestamp = jiffies;
66179efe
AA		 3804 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3805 &data->res.seq_res, 1, task))
3806 return;
5138fde0 3807 rpc_call_start(task);
3110ff80 3808 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3809}
3810
3811static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3812{
3813 struct nfs4_lockdata *data = calldata;
3814
3110ff80 3815 dprintk("%s: begin!\n", __func__);
a5d16a4d 3816
66179efe
AA		 3817 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3818 task->tk_status);
3819
a5d16a4d
TM		 3820 data->rpc_status = task->tk_status;
3821 if (RPC_ASSASSINATED(task))
3822 goto out;
3823 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3824 if (data->rpc_status == 0)
3825 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3826 else
3827 goto out;
3828 }
3829 if (data->rpc_status == 0) {
3830 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3831 sizeof(data->lsp->ls_stateid.data));
3832 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3833 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3834 }
a5d16a4d 3835out:
3110ff80 3836 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3837}
3838
3839static void nfs4_lock_release(void *calldata)
3840{
3841 struct nfs4_lockdata *data = calldata;
3842
3110ff80 3843 dprintk("%s: begin!\n", __func__);
2f74c0a0 3844 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3845 if (data->cancelled != 0) {
3846 struct rpc_task *task;
3847 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3848 data->arg.lock_seqid);
3849 if (!IS_ERR(task))
e6b3c4db 3850 rpc_put_task(task);
3110ff80 3851 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3852 } else
3853 nfs_free_seqid(data->arg.lock_seqid);
3854 nfs4_put_lock_state(data->lsp);
3855 put_nfs_open_context(data->ctx);
3856 kfree(data);
3110ff80 3857 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3858}
3859
3860static const struct rpc_call_ops nfs4_lock_ops = {
3861 .rpc_call_prepare = nfs4_lock_prepare,
3862 .rpc_call_done = nfs4_lock_done,
3863 .rpc_release = nfs4_lock_release,
3864};
3865
3866static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3867{
3868 struct nfs4_lockdata *data;
3869 struct rpc_task *task;
5138fde0
TM		 3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3872 .rpc_cred = state->owner->so_cred,
3873 };
c970aa85
TM		 3874 struct rpc_task_setup task_setup_data = {
3875 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3876 .rpc_message = &msg,
c970aa85 3877 .callback_ops = &nfs4_lock_ops,
101070ca 3878 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3879 .flags = RPC_TASK_ASYNC,
3880 };
a5d16a4d
TM		 3881 int ret;
3882
3110ff80 3883 dprintk("%s: begin!\n", __func__);
cd3758e3 3884 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3885 fl->fl_u.nfs4_fl.owner);
3886 if (data == NULL)
3887 return -ENOMEM;
3888 if (IS_SETLKW(cmd))
3889 data->arg.block = 1;
3890 if (reclaim != 0)
3891 data->arg.reclaim = 1;
5138fde0
TM		 3892 msg.rpc_argp = &data->arg,
3893 msg.rpc_resp = &data->res,
c970aa85
TM		 3894 task_setup_data.callback_data = data;
3895 task = rpc_run_task(&task_setup_data);
7a1218a2 3896 if (IS_ERR(task))
a5d16a4d 3897 return PTR_ERR(task);
a5d16a4d
TM		 3898 ret = nfs4_wait_for_completion_rpc_task(task);
3899 if (ret == 0) {
3900 ret = data->rpc_status;
3901 if (ret == -NFS4ERR_DENIED)
3902 ret = -EAGAIN;
3903 } else
3904 data->cancelled = 1;
e6b3c4db 3905 rpc_put_task(task);
3110ff80 3906 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3907 return ret;
1da177e4
LT		 3908}
3909
3910static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3911{
202b50dc
TM		 3912 struct nfs_server *server = NFS_SERVER(state->inode);
3913 struct nfs4_exception exception = { };
3914 int err;
3915
3916 do {
42a2d13e
TM		 3917 /* Cache the lock if possible... */
3918 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3919 return 0;
202b50dc
TM		 3920 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3921 if (err != -NFS4ERR_DELAY)
3922 break;
3923 nfs4_handle_exception(server, err, &exception);
3924 } while (exception.retry);
3925 return err;
1da177e4
LT		 3926}
3927
3928static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3929{
202b50dc
TM		 3930 struct nfs_server *server = NFS_SERVER(state->inode);
3931 struct nfs4_exception exception = { };
3932 int err;
3933
6bfc93ef
TM		 3934 err = nfs4_set_lock_state(state, request);
3935 if (err != 0)
3936 return err;
202b50dc 3937 do {
42a2d13e
TM		 3938 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3939 return 0;
202b50dc
TM		 3940 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3941 if (err != -NFS4ERR_DELAY)
3942 break;
3943 nfs4_handle_exception(server, err, &exception);
3944 } while (exception.retry);
3945 return err;
1da177e4
LT		 3946}
3947
3948static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3949{
19e03c57 3950 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3951 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3952 int status;
3953
6bfc93ef 3954 /* Is this a delegated open? */
6bfc93ef
TM		 3955 status = nfs4_set_lock_state(state, request);
3956 if (status != 0)
3957 goto out;
01c3b861
TM		 3958 request->fl_flags |= FL_ACCESS;
3959 status = do_vfs_lock(request->fl_file, request);
3960 if (status < 0)
3961 goto out;
19e03c57 3962 down_read(&nfsi->rwsem);
01c3b861 3963 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3964 /* Yes: cache locks! */
01c3b861 3965 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3966 request->fl_flags = fl_flags & ~FL_SLEEP;
3967 status = do_vfs_lock(request->fl_file, request);
3968 goto out_unlock;
01c3b861 3969 }
6bfc93ef
TM		 3970 status = _nfs4_do_setlk(state, cmd, request, 0);
3971 if (status != 0)
01c3b861 3972 goto out_unlock;
6bfc93ef 3973 /* Note: we always want to sleep here! */
01c3b861 3974 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3975 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3976 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3977out_unlock:
19e03c57 3978 up_read(&nfsi->rwsem);
01c3b861
TM		 3979out:
3980 request->fl_flags = fl_flags;
1da177e4
LT		 3981 return status;
3982}
3983
3984static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3985{
3986 struct nfs4_exception exception = { };
3987 int err;
3988
3989 do {
3990 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3991 _nfs4_proc_setlk(state, cmd, request),
3992 &exception);
3993 } while (exception.retry);
3994 return err;
3995}
3996
3997static int
3998nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3999{
4000 struct nfs_open_context *ctx;
4001 struct nfs4_state *state;
4002 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4003 int status;
4004
4005 /* verify open state */
cd3758e3 4006 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4007 state = ctx->state;
4008
4009 if (request->fl_start < 0 || request->fl_end < 0)
4010 return -EINVAL;
4011
4012 if (IS_GETLK(cmd))
4013 return nfs4_proc_getlk(state, F_GETLK, request);
4014
4015 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4016 return -EINVAL;
4017
4018 if (request->fl_type == F_UNLCK)
4019 return nfs4_proc_unlck(state, cmd, request);
4020
4021 do {
4022 status = nfs4_proc_setlk(state, cmd, request);
4023 if ((status != -EAGAIN) || IS_SETLK(cmd))
4024 break;
4025 timeout = nfs4_set_lock_task_retry(timeout);
4026 status = -ERESTARTSYS;
4027 if (signalled())
4028 break;
4029 } while(status < 0);
1da177e4
LT		 4030 return status;
4031}
4032
888e694c
TM		 4033int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4034{
4035 struct nfs_server *server = NFS_SERVER(state->inode);
4036 struct nfs4_exception exception = { };
4037 int err;
4038
4039 err = nfs4_set_lock_state(state, fl);
4040 if (err != 0)
4041 goto out;
4042 do {
4043 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4044 if (err != -NFS4ERR_DELAY)
4045 break;
4046 err = nfs4_handle_exception(server, err, &exception);
4047 } while (exception.retry);
4048out:
4049 return err;
4050}
6b3b5496 4051
aa1870af
BF		 4052#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4053
6b3b5496
BF		 4054int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4055 size_t buflen, int flags)
4056{
4b580ee3
BF		 4057 struct inode *inode = dentry->d_inode;
4058
4059 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4060 return -EOPNOTSUPP;
4061
4b580ee3 4062 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4063}
4064
4065/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4066 * and that's what we'll do for e.g. user attributes that haven't been set.
4067 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4068 * attributes in kernel-managed attribute namespaces. */
4069ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4070 size_t buflen)
4071{
aa1870af
BF		 4072 struct inode *inode = dentry->d_inode;
4073
4074 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4075 return -EOPNOTSUPP;
4076
4077 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4078}
4079
4080ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4081{
aa1870af 4082 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4083
096455a2
BF		 4084 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4085 return 0;
6b3b5496
BF		 4086 if (buf && buflen < len)
4087 return -ERANGE;
4088 if (buf)
aa1870af
BF		 4089 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4090 return len;
6b3b5496
BF		 4091}
4092
69aaaae1
TM		 4093static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4094{
4095 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4096 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4097 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4098 return;
4099
4100 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4101 NFS_ATTR_FATTR_NLINK;
4102 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4103 fattr->nlink = 2;
4104}
4105
56659e99 4106int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4107 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4108{
4109 struct nfs_server *server = NFS_SERVER(dir);
4110 u32 bitmask[2] = {
361e624f
MN		 4111 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4112 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4113 };
4114 struct nfs4_fs_locations_arg args = {
4115 .dir_fh = NFS_FH(dir),
c228fd3a 4116 .name = name,
683b57b4
TM		 4117 .page = page,
4118 .bitmask = bitmask,
4119 };
22958463
BH		 4120 struct nfs4_fs_locations_res res = {
4121 .fs_locations = fs_locations,
4122 };
683b57b4
TM		 4123 struct rpc_message msg = {
4124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4125 .rpc_argp = &args,
22958463 4126 .rpc_resp = &res,
683b57b4
TM		 4127 };
4128 int status;
4129
3110ff80 4130 dprintk("%s: start\n", __func__);
c228fd3a 4131 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4132 fs_locations->server = server;
830b8e33 4133 fs_locations->nlocations = 0;
cccef3b9 4134 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4135 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4136 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4137 return status;
4138}
4139
557134a3 4140#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4141/*
4142 * nfs4_proc_exchange_id()
4143 *
4144 * Since the clientid has expired, all compounds using sessions
4145 * associated with the stale clientid will be returning
4146 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4147 * be in some phase of session reset.
4148 */
4149static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4150{
4151 nfs4_verifier verifier;
4152 struct nfs41_exchange_id_args args = {
4153 .client = clp,
4154 .flags = clp->cl_exchange_flags,
4155 };
4156 struct nfs41_exchange_id_res res = {
4157 .client = clp,
4158 };
4159 int status;
4160 struct rpc_message msg = {
4161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4162 .rpc_argp = &args,
4163 .rpc_resp = &res,
4164 .rpc_cred = cred,
4165 };
4166 __be32 *p;
4167
4168 dprintk("--> %s\n", __func__);
4169 BUG_ON(clp == NULL);
4170 p = (u32 *)verifier.data;
4171 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4172 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4173 args.verifier = &verifier;
4174
4175 while (1) {
4176 args.id_len = scnprintf(args.id, sizeof(args.id),
4177 "%s/%s %u",
4178 clp->cl_ipaddr,
4179 rpc_peeraddr2str(clp->cl_rpcclient,
4180 RPC_DISPLAY_ADDR),
4181 clp->cl_id_uniquifier);
4182
4183 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4184
4185 if (status != NFS4ERR_CLID_INUSE)
4186 break;
4187
4188 if (signalled())
4189 break;
4190
4191 if (++clp->cl_id_uniquifier == 0)
4192 break;
4193 }
4194
4195 dprintk("<-- %s status= %d\n", __func__, status);
4196 return status;
4197}
4198
2050f0cc
AA		 4199struct nfs4_get_lease_time_data {
4200 struct nfs4_get_lease_time_args *args;
4201 struct nfs4_get_lease_time_res *res;
4202 struct nfs_client *clp;
4203};
4204
4205static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4206 void *calldata)
4207{
4208 int ret;
4209 struct nfs4_get_lease_time_data *data =
4210 (struct nfs4_get_lease_time_data *)calldata;
4211
4212 dprintk("--> %s\n", __func__);
4213 /* just setup sequence, do not trigger session recovery
4214 since we're invoked within one */
4215 ret = nfs41_setup_sequence(data->clp->cl_session,
4216 &data->args->la_seq_args,
4217 &data->res->lr_seq_res, 0, task);
4218
4219 BUG_ON(ret == -EAGAIN);
4220 rpc_call_start(task);
4221 dprintk("<-- %s\n", __func__);
4222}
4223
4224/*
4225 * Called from nfs4_state_manager thread for session setup, so don't recover
4226 * from sequence operation or clientid errors.
4227 */
4228static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4229{
4230 struct nfs4_get_lease_time_data *data =
4231 (struct nfs4_get_lease_time_data *)calldata;
4232
4233 dprintk("--> %s\n", __func__);
4234 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4235 switch (task->tk_status) {
4236 case -NFS4ERR_DELAY:
4237 case -NFS4ERR_GRACE:
4238 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4239 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4240 task->tk_status = 0;
eedc020e 4241 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4242 return;
4243 }
4244 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4245 dprintk("<-- %s\n", __func__);
4246}
4247
4248struct rpc_call_ops nfs4_get_lease_time_ops = {
4249 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4250 .rpc_call_done = nfs4_get_lease_time_done,
4251};
4252
4253int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4254{
4255 struct rpc_task *task;
4256 struct nfs4_get_lease_time_args args;
4257 struct nfs4_get_lease_time_res res = {
4258 .lr_fsinfo = fsinfo,
4259 };
4260 struct nfs4_get_lease_time_data data = {
4261 .args = &args,
4262 .res = &res,
4263 .clp = clp,
4264 };
4265 struct rpc_message msg = {
4266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4267 .rpc_argp = &args,
4268 .rpc_resp = &res,
4269 };
4270 struct rpc_task_setup task_setup = {
4271 .rpc_client = clp->cl_rpcclient,
4272 .rpc_message = &msg,
4273 .callback_ops = &nfs4_get_lease_time_ops,
4274 .callback_data = &data
4275 };
4276 int status;
4277
4278 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4279 dprintk("--> %s\n", __func__);
4280 task = rpc_run_task(&task_setup);
4281
4282 if (IS_ERR(task))
4283 status = PTR_ERR(task);
4284 else {
4285 status = task->tk_status;
4286 rpc_put_task(task);
4287 }
4288 dprintk("<-- %s return %d\n", __func__, status);
4289
4290 return status;
4291}
4292
ac72b7b3
AA		 4293/* Reset a slot table */
4294static int nfs4_reset_slot_table(struct nfs4_session *session)
4295{
4296 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4297 int i, max_slots = session->fc_attrs.max_reqs;
4298 int old_max_slots = session->fc_slot_table.max_slots;
4299 int ret = 0;
4300
4301 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
4302 session->fc_attrs.max_reqs, tbl);
4303
4304 /* Until we have dynamic slot table adjustment, insist
4305 * upon the same slot table size */
4306 if (max_slots != old_max_slots) {
4307 dprintk("%s reset slot table does't match old\n",
4308 __func__);
4309 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4310 goto out;
4311 }
4312 spin_lock(&tbl->slot_tbl_lock);
4313 for (i = 0; i < max_slots; ++i)
4314 tbl->slots[i].seq_nr = 1;
4315 tbl->highest_used_slotid = -1;
4316 spin_unlock(&tbl->slot_tbl_lock);
4317 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4318 tbl, tbl->slots, tbl->max_slots);
4319out:
4320 dprintk("<-- %s: return %d\n", __func__, ret);
4321 return ret;
4322}
4323
fc931582
AA		 4324/*
4325 * Initialize slot table
4326 */
4327static int nfs4_init_slot_table(struct nfs4_session *session)
4328{
4329 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4330 int i, max_slots = session->fc_attrs.max_reqs;
4331 struct nfs4_slot *slot;
4332 int ret = -ENOMEM;
4333
4334 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4335
4336 dprintk("--> %s: max_reqs=%u\n", __func__,
4337 session->fc_attrs.max_reqs);
4338
4339 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4340 if (!slot)
4341 goto out;
4342 for (i = 0; i < max_slots; ++i)
4343 slot[i].seq_nr = 1;
4344 ret = 0;
4345
4346 spin_lock(&tbl->slot_tbl_lock);
4347 if (tbl->slots != NULL) {
4348 spin_unlock(&tbl->slot_tbl_lock);
4349 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4350 __func__, tbl, tbl->slots);
4351 WARN_ON(1);
4352 goto out_free;
4353 }
4354 tbl->max_slots = max_slots;
4355 tbl->slots = slot;
4356 tbl->highest_used_slotid = -1; /* no slot is currently used */
4357 spin_unlock(&tbl->slot_tbl_lock);
4358 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4359 tbl, tbl->slots, tbl->max_slots);
4360out:
4361 dprintk("<-- %s: return %d\n", __func__, ret);
4362 return ret;
4363out_free:
4364 kfree(slot);
4365 goto out;
4366}
4367
557134a3
AA		 4368/* Destroy the slot table */
4369static void nfs4_destroy_slot_table(struct nfs4_session *session)
4370{
4371 if (session->fc_slot_table.slots == NULL)
4372 return;
4373 kfree(session->fc_slot_table.slots);
4374 session->fc_slot_table.slots = NULL;
4375 return;
4376}
4377
4378struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4379{
4380 struct nfs4_session *session;
4381 struct nfs4_slot_table *tbl;
4382
4383 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4384 if (!session)
4385 return NULL;
76db6d95
AA		 4386
4387 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4388 /*
4389 * The create session reply races with the server back
4390 * channel probe. Mark the client NFS_CS_SESSION_INITING
4391 * so that the client back channel can find the
4392 * nfs_client struct
4393 */
4394 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4395
557134a3
AA		 4396 tbl = &session->fc_slot_table;
4397 spin_lock_init(&tbl->slot_tbl_lock);
4398 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4399 session->clp = clp;
4400 return session;
4401}
4402
4403void nfs4_destroy_session(struct nfs4_session *session)
4404{
4405 nfs4_destroy_slot_table(session);
4406 kfree(session);
4407}
4408
fc931582
AA		 4409/*
4410 * Initialize the values to be used by the client in CREATE_SESSION
4411 * If nfs4_init_session set the fore channel request and response sizes,
4412 * use them.
4413 *
4414 * Set the back channel max_resp_sz_cached to zero to force the client to
4415 * always set csa_cachethis to FALSE because the current implementation
4416 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4417 */
4418static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4419{
4420 struct nfs4_session *session = args->client->cl_session;
4421 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4422 mxresp_sz = session->fc_attrs.max_resp_sz;
4423
4424 if (mxrqst_sz == 0)
4425 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4426 if (mxresp_sz == 0)
4427 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4428 /* Fore channel attributes */
4429 args->fc_attrs.headerpadsz = 0;
4430 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4431 args->fc_attrs.max_resp_sz = mxresp_sz;
4432 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4433 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4434 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4435
4436 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4437 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4438 __func__,
4439 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4440 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4441 args->fc_attrs.max_reqs);
4442
4443 /* Back channel attributes */
4444 args->bc_attrs.headerpadsz = 0;
4445 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4446 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4447 args->bc_attrs.max_resp_sz_cached = 0;
4448 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4449 args->bc_attrs.max_reqs = 1;
4450
4451 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4452 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4453 __func__,
4454 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4455 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4456 args->bc_attrs.max_reqs);
4457}
4458
8d35301d
AA		 4459static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4460{
4461 if (rcvd <= sent)
4462 return 0;
4463 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4464 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4465 return -EINVAL;
4466}
4467
4468#define _verify_fore_channel_attr(_name_) \
4469 _verify_channel_attr("fore", #_name_, \
4470 args->fc_attrs._name_, \
4471 session->fc_attrs._name_)
4472
4473#define _verify_back_channel_attr(_name_) \
4474 _verify_channel_attr("back", #_name_, \
4475 args->bc_attrs._name_, \
4476 session->bc_attrs._name_)
4477
4478/*
4479 * The server is not allowed to increase the fore channel header pad size,
4480 * maximum response size, or maximum number of operations.
4481 *
4482 * The back channel attributes are only negotiatied down: We send what the
4483 * (back channel) server insists upon.
4484 */
4485static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4486 struct nfs4_session *session)
4487{
4488 int ret = 0;
4489
4490 ret |= _verify_fore_channel_attr(headerpadsz);
4491 ret |= _verify_fore_channel_attr(max_resp_sz);
4492 ret |= _verify_fore_channel_attr(max_ops);
4493
4494 ret |= _verify_back_channel_attr(headerpadsz);
4495 ret |= _verify_back_channel_attr(max_rqst_sz);
4496 ret |= _verify_back_channel_attr(max_resp_sz);
4497 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4498 ret |= _verify_back_channel_attr(max_ops);
4499 ret |= _verify_back_channel_attr(max_reqs);
4500
4501 return ret;
4502}
4503
fc931582
AA		 4504static int _nfs4_proc_create_session(struct nfs_client *clp)
4505{
4506 struct nfs4_session *session = clp->cl_session;
4507 struct nfs41_create_session_args args = {
4508 .client = clp,
4509 .cb_program = NFS4_CALLBACK,
4510 };
4511 struct nfs41_create_session_res res = {
4512 .client = clp,
4513 };
4514 struct rpc_message msg = {
4515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4516 .rpc_argp = &args,
4517 .rpc_resp = &res,
4518 };
4519 int status;
4520
4521 nfs4_init_channel_attrs(&args);
4522 args.flags = (SESSION4_PERSIST);
4523
4524 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4525
8d35301d
AA		 4526 if (!status)
4527 /* Verify the session's negotiated channel_attrs values */
4528 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4529 if (!status) {
4530 /* Increment the clientid slot sequence id */
4531 clp->cl_seqid++;
4532 }
4533
4534 return status;
4535}
4536
4537/*
4538 * Issues a CREATE_SESSION operation to the server.
4539 * It is the responsibility of the caller to verify the session is
4540 * expired before calling this routine.
4541 */
ac72b7b3 4542int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4543{
4544 int status;
4545 unsigned *ptr;
4546 struct nfs_fsinfo fsinfo;
4547 struct nfs4_session *session = clp->cl_session;
4548
4549 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4550
4551 status = _nfs4_proc_create_session(clp);
4552 if (status)
4553 goto out;
4554
ac72b7b3
AA		 4555 /* Init or reset the fore channel */
4556 if (reset)
4557 status = nfs4_reset_slot_table(session);
4558 else
4559 status = nfs4_init_slot_table(session);
fc931582
AA		 4560 dprintk("fore channel slot table initialization returned %d\n", status);
4561 if (status)
4562 goto out;
4563
4564 ptr = (unsigned *)&session->sess_id.data[0];
4565 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4566 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4567
ac72b7b3
AA		 4568 if (reset)
4569 /* Lease time is aleady set */
4570 goto out;
4571
fc931582
AA		 4572 /* Get the lease time */
4573 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4574 if (status == 0) {
4575 /* Update lease time and schedule renewal */
4576 spin_lock(&clp->cl_lock);
4577 clp->cl_lease_time = fsinfo.lease_time * HZ;
4578 clp->cl_last_renewal = jiffies;
4579 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4580 spin_unlock(&clp->cl_lock);
4581
4582 nfs4_schedule_state_renewal(clp);
4583 }
4584out:
4585 dprintk("<-- %s\n", __func__);
4586 return status;
4587}
4588
0f3e66c6
AA		 4589/*
4590 * Issue the over-the-wire RPC DESTROY_SESSION.
4591 * The caller must serialize access to this routine.
4592 */
4593int nfs4_proc_destroy_session(struct nfs4_session *session)
4594{
4595 int status = 0;
4596 struct rpc_message msg;
4597
4598 dprintk("--> nfs4_proc_destroy_session\n");
4599
4600 /* session is still being setup */
4601 if (session->clp->cl_cons_state != NFS_CS_READY)
4602 return status;
4603
4604 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4605 msg.rpc_argp = session;
4606 msg.rpc_resp = NULL;
4607 msg.rpc_cred = NULL;
4608 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4609
4610 if (status)
4611 printk(KERN_WARNING
4612 "Got error %d from the server on DESTROY_SESSION. "
4613 "Session has been destroyed regardless...\n", status);
4614
4615 dprintk("<-- nfs4_proc_destroy_session\n");
4616 return status;
4617}
4618
fc01cea9
AA		 4619/*
4620 * Renew the cl_session lease.
4621 */
4622static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4623{
4624 struct nfs4_sequence_args args;
4625 struct nfs4_sequence_res res;
4626
4627 struct rpc_message msg = {
4628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4629 .rpc_argp = &args,
4630 .rpc_resp = &res,
4631 .rpc_cred = cred,
4632 };
4633
4634 args.sa_cache_this = 0;
4635
4636 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4637 &res, 0);
4638}
4639
4640void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4641{
4642 struct nfs_client *clp = (struct nfs_client *)data;
4643
4644 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4645
4646 if (task->tk_status < 0) {
4647 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4648
4649 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4650 == -EAGAIN) {
eedc020e 4651 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4652 return;
4653 }
4654 }
4655 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4656 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4657
4658 put_rpccred(task->tk_msg.rpc_cred);
4659 kfree(task->tk_msg.rpc_argp);
4660 kfree(task->tk_msg.rpc_resp);
4661
4662 dprintk("<-- %s\n", __func__);
4663}
4664
4665static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4666{
4667 struct nfs_client *clp;
4668 struct nfs4_sequence_args *args;
4669 struct nfs4_sequence_res *res;
4670
4671 clp = (struct nfs_client *)data;
4672 args = task->tk_msg.rpc_argp;
4673 res = task->tk_msg.rpc_resp;
4674
4675 if (nfs4_setup_sequence(clp, args, res, 0, task))
4676 return;
4677 rpc_call_start(task);
4678}
4679
4680static const struct rpc_call_ops nfs41_sequence_ops = {
4681 .rpc_call_done = nfs41_sequence_call_done,
4682 .rpc_call_prepare = nfs41_sequence_prepare,
4683};
4684
4685static int nfs41_proc_async_sequence(struct nfs_client *clp,
4686 struct rpc_cred *cred)
4687{
4688 struct nfs4_sequence_args *args;
4689 struct nfs4_sequence_res *res;
4690 struct rpc_message msg = {
4691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4692 .rpc_cred = cred,
4693 };
4694
4695 args = kzalloc(sizeof(*args), GFP_KERNEL);
4696 if (!args)
4697 return -ENOMEM;
4698 res = kzalloc(sizeof(*res), GFP_KERNEL);
4699 if (!res) {
4700 kfree(args);
4701 return -ENOMEM;
4702 }
4703 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4704 msg.rpc_argp = args;
4705 msg.rpc_resp = res;
4706
4707 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4708 &nfs41_sequence_ops, (void *)clp);
4709}
4710
557134a3
AA		 4711#endif /* CONFIG_NFS_V4_1 */
4712
1da177e4 4713struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 4714 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4715 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4716 .recover_open = nfs4_open_reclaim,
4717 .recover_lock = nfs4_lock_reclaim,
4718};
4719
b79a4a1b 4720struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 4721 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4722 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4723 .recover_open = nfs4_open_expired,
4724 .recover_lock = nfs4_lock_expired,
4725};
4726
92e1d5be 4727static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4728 .permission = nfs_permission,
4729 .getattr = nfs_getattr,
4730 .setattr = nfs_setattr,
4731 .getxattr = nfs4_getxattr,
4732 .setxattr = nfs4_setxattr,
4733 .listxattr = nfs4_listxattr,
4734};
4735
509de811 4736const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4737 .version = 4, /* protocol version */
4738 .dentry_ops = &nfs4_dentry_operations,
4739 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4740 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4741 .getroot = nfs4_proc_get_root,
4742 .getattr = nfs4_proc_getattr,
4743 .setattr = nfs4_proc_setattr,
2b3de441 4744 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4745 .lookup = nfs4_proc_lookup,
4746 .access = nfs4_proc_access,
4747 .readlink = nfs4_proc_readlink,
1da177e4
LT		 4748 .create = nfs4_proc_create,
4749 .remove = nfs4_proc_remove,
4750 .unlink_setup = nfs4_proc_unlink_setup,
4751 .unlink_done = nfs4_proc_unlink_done,
4752 .rename = nfs4_proc_rename,
4753 .link = nfs4_proc_link,
4754 .symlink = nfs4_proc_symlink,
4755 .mkdir = nfs4_proc_mkdir,
4756 .rmdir = nfs4_proc_remove,
4757 .readdir = nfs4_proc_readdir,
4758 .mknod = nfs4_proc_mknod,
4759 .statfs = nfs4_proc_statfs,
4760 .fsinfo = nfs4_proc_fsinfo,
4761 .pathconf = nfs4_proc_pathconf,
e9326dca 4762 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 4763 .decode_dirent = nfs4_decode_dirent,
4764 .read_setup = nfs4_proc_read_setup,
ec06c096 4765 .read_done = nfs4_read_done,
1da177e4 4766 .write_setup = nfs4_proc_write_setup,
788e7a89 4767 .write_done = nfs4_write_done,
1da177e4 4768 .commit_setup = nfs4_proc_commit_setup,
788e7a89 4769 .commit_done = nfs4_commit_done,
1da177e4 4770 .lock = nfs4_proc_lock,
e50a1c2e 4771 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 4772 .close_context = nfs4_close_context,
1da177e4
LT		 4773};
4774
4775/*
4776 * Local variables:
4777 * c-basic-offset: 8
4778 * End:
4779 */
Linux 6.x block layer and io_uring tree(s)