nfs41: Setup the backchannel
[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;
4745e315 252#if !defined(CONFIG_NFS_V4_1)
65de872e 253 break;
4745e315
AA
254#else /* !defined(CONFIG_NFS_V4_1) */
255 if (!nfs4_has_session(server->nfs_client))
256 break;
257 /* FALLTHROUGH */
258 case -NFS4ERR_BADSESSION:
259 case -NFS4ERR_BADSLOT:
260 case -NFS4ERR_BAD_HIGH_SLOT:
261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
262 case -NFS4ERR_DEADSESSION:
263 case -NFS4ERR_SEQ_FALSE_RETRY:
264 case -NFS4ERR_SEQ_MISORDERED:
265 dprintk("%s ERROR: %d Reset session\n", __func__,
266 errorcode);
267 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
268 exception->retry = 1;
269 /* FALLTHROUGH */
270#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM
271 case -NFS4ERR_FILE_OPEN:
272 case -NFS4ERR_GRACE:
273 case -NFS4ERR_DELAY:
274 ret = nfs4_delay(server->client, &exception->timeout);
275 if (ret != 0)
276 break;
277 case -NFS4ERR_OLD_STATEID:
278 exception->retry = 1;
279 }
280 /* We failed to handle the error */
281 return nfs4_map_errors(ret);
282}
283
284
26e976a8 285static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 286{
7539bbab 287 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
288 spin_lock(&clp->cl_lock);
289 if (time_before(clp->cl_last_renewal,timestamp))
290 clp->cl_last_renewal = timestamp;
291 spin_unlock(&clp->cl_lock);
292}
293
cccef3b9
AA
294#if defined(CONFIG_NFS_V4_1)
295
e2c4ab3c
AA
296/*
297 * nfs4_free_slot - free a slot and efficiently update slot table.
298 *
299 * freeing a slot is trivially done by clearing its respective bit
300 * in the bitmap.
301 * If the freed slotid equals highest_used_slotid we want to update it
302 * so that the server would be able to size down the slot table if needed,
303 * otherwise we know that the highest_used_slotid is still in use.
304 * When updating highest_used_slotid there may be "holes" in the bitmap
305 * so we need to scan down from highest_used_slotid to 0 looking for the now
306 * highest slotid in use.
307 * If none found, highest_used_slotid is set to -1.
308 */
309static void
310nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
311{
312 int slotid = free_slotid;
313
314 spin_lock(&tbl->slot_tbl_lock);
315 /* clear used bit in bitmap */
316 __clear_bit(slotid, tbl->used_slots);
317
318 /* update highest_used_slotid when it is freed */
319 if (slotid == tbl->highest_used_slotid) {
320 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
321 if (slotid >= 0 && slotid < tbl->max_slots)
322 tbl->highest_used_slotid = slotid;
323 else
324 tbl->highest_used_slotid = -1;
325 }
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 spin_unlock(&tbl->slot_tbl_lock);
328 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
329 free_slotid, tbl->highest_used_slotid);
330}
331
13615871
AA
332void nfs41_sequence_free_slot(const struct nfs_client *clp,
333 struct nfs4_sequence_res *res)
334{
335 struct nfs4_slot_table *tbl;
336
337 if (!nfs4_has_session(clp)) {
338 dprintk("%s: No session\n", __func__);
339 return;
340 }
341 tbl = &clp->cl_session->fc_slot_table;
342 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
343 dprintk("%s: No slot\n", __func__);
344 /* just wake up the next guy waiting since
345 * we may have not consumed a slot after all */
346 rpc_wake_up_next(&tbl->slot_tbl_waitq);
347 return;
348 }
349 nfs4_free_slot(tbl, res->sr_slotid);
350 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
351}
352
b0df806c
AA
353static void nfs41_sequence_done(struct nfs_client *clp,
354 struct nfs4_sequence_res *res,
355 int rpc_status)
356{
357 unsigned long timestamp;
358 struct nfs4_slot_table *tbl;
359 struct nfs4_slot *slot;
360
361 /*
362 * sr_status remains 1 if an RPC level error occurred. The server
363 * may or may not have processed the sequence operation..
364 * Proceed as if the server received and processed the sequence
365 * operation.
366 */
367 if (res->sr_status == 1)
368 res->sr_status = NFS_OK;
369
370 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
371 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
372 goto out;
373
374 tbl = &clp->cl_session->fc_slot_table;
375 slot = tbl->slots + res->sr_slotid;
376
377 if (res->sr_status == 0) {
378 /* Update the slot's sequence and clientid lease timer */
379 ++slot->seq_nr;
380 timestamp = res->sr_renewal_time;
381 spin_lock(&clp->cl_lock);
382 if (time_before(clp->cl_last_renewal, timestamp))
383 clp->cl_last_renewal = timestamp;
384 spin_unlock(&clp->cl_lock);
385 return;
386 }
387out:
388 /* The session may be reset by one of the error handlers. */
389 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
390 nfs41_sequence_free_slot(clp, res);
391}
392
510b8175
BH
393/*
394 * nfs4_find_slot - efficiently look for a free slot
395 *
396 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
397 * If found, we mark the slot as used, update the highest_used_slotid,
398 * and respectively set up the sequence operation args.
399 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA
400 *
401 * Note: must be called with under the slot_tbl_lock.
510b8175
BH
402 */
403static u8
404nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
405{
406 int slotid;
407 u8 ret_id = NFS4_MAX_SLOT_TABLE;
408 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
409
510b8175
BH
410 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
411 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
412 tbl->max_slots);
413 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
414 if (slotid >= tbl->max_slots)
415 goto out;
416 __set_bit(slotid, tbl->used_slots);
417 if (slotid > tbl->highest_used_slotid)
418 tbl->highest_used_slotid = slotid;
419 ret_id = slotid;
420out:
421 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
422 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH
423 return ret_id;
424}
425
b069d94a
AA
426static int nfs4_recover_session(struct nfs4_session *session)
427{
428 struct nfs_client *clp = session->clp;
429 int ret;
430
431 for (;;) {
432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret != 0)
434 return ret;
435 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
436 break;
437 nfs4_schedule_state_manager(clp);
438 }
439 return 0;
440}
441
ce5039c1
AA
442static int nfs41_setup_sequence(struct nfs4_session *session,
443 struct nfs4_sequence_args *args,
444 struct nfs4_sequence_res *res,
445 int cache_reply,
446 struct rpc_task *task)
447{
fbcd4abc
AA
448 struct nfs4_slot *slot;
449 struct nfs4_slot_table *tbl;
b069d94a 450 int status = 0;
fbcd4abc
AA
451 u8 slotid;
452
453 dprintk("--> %s\n", __func__);
ce5039c1
AA
454 /* slot already allocated? */
455 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
456 return 0;
457
458 memset(res, 0, sizeof(*res));
459 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA
460 tbl = &session->fc_slot_table;
461
462 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA
463 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
464 if (tbl->highest_used_slotid != -1) {
465 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
466 spin_unlock(&tbl->slot_tbl_lock);
467 dprintk("<-- %s: Session reset: draining\n", __func__);
468 return -EAGAIN;
469 }
470
471 /* The slot table is empty; start the reset thread */
472 dprintk("%s Session Reset\n", __func__);
473 spin_unlock(&tbl->slot_tbl_lock);
474 status = nfs4_recover_session(session);
475 if (status)
476 return status;
477 spin_lock(&tbl->slot_tbl_lock);
478 }
479
fbcd4abc
AA
480 slotid = nfs4_find_slot(tbl, task);
481 if (slotid == NFS4_MAX_SLOT_TABLE) {
482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
483 spin_unlock(&tbl->slot_tbl_lock);
484 dprintk("<-- %s: no free slots\n", __func__);
485 return -EAGAIN;
486 }
487 spin_unlock(&tbl->slot_tbl_lock);
488
489 slot = tbl->slots + slotid;
99fe60d0 490 args->sa_session = session;
fbcd4abc
AA
491 args->sa_slotid = slotid;
492 args->sa_cache_this = cache_reply;
493
494 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
495
99fe60d0 496 res->sr_session = session;
fbcd4abc
AA
497 res->sr_slotid = slotid;
498 res->sr_renewal_time = jiffies;
499 /*
500 * sr_status is only set in decode_sequence, and so will remain
501 * set to 1 if an rpc level failure occurs.
502 */
503 res->sr_status = 1;
ce5039c1
AA
504 return 0;
505}
506
507int nfs4_setup_sequence(struct nfs_client *clp,
508 struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res,
510 int cache_reply,
511 struct rpc_task *task)
512{
513 int ret = 0;
514
515 dprintk("--> %s clp %p session %p sr_slotid %d\n",
516 __func__, clp, clp->cl_session, res->sr_slotid);
517
518 if (!nfs4_has_session(clp))
519 goto out;
520 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
521 task);
522 if (ret != -EAGAIN) {
523 /* terminate rpc task */
524 task->tk_status = ret;
525 task->tk_action = NULL;
526 }
527out:
528 dprintk("<-- %s status=%d\n", __func__, ret);
529 return ret;
530}
531
532struct nfs41_call_sync_data {
533 struct nfs_client *clp;
534 struct nfs4_sequence_args *seq_args;
535 struct nfs4_sequence_res *seq_res;
536 int cache_reply;
537};
538
539static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
540{
541 struct nfs41_call_sync_data *data = calldata;
542
543 dprintk("--> %s data->clp->cl_session %p\n", __func__,
544 data->clp->cl_session);
545 if (nfs4_setup_sequence(data->clp, data->seq_args,
546 data->seq_res, data->cache_reply, task))
547 return;
548 rpc_call_start(task);
549}
550
69ab40c4
AA
551static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
552{
553 struct nfs41_call_sync_data *data = calldata;
554
555 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556 nfs41_sequence_free_slot(data->clp, data->seq_res);
557}
558
ce5039c1
AA
559struct rpc_call_ops nfs41_call_sync_ops = {
560 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 561 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA
562};
563
564static int nfs4_call_sync_sequence(struct nfs_client *clp,
565 struct rpc_clnt *clnt,
566 struct rpc_message *msg,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 int cache_reply)
570{
571 int ret;
572 struct rpc_task *task;
573 struct nfs41_call_sync_data data = {
574 .clp = clp,
575 .seq_args = args,
576 .seq_res = res,
577 .cache_reply = cache_reply,
578 };
579 struct rpc_task_setup task_setup = {
580 .rpc_client = clnt,
581 .rpc_message = msg,
582 .callback_ops = &nfs41_call_sync_ops,
583 .callback_data = &data
584 };
585
586 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
587 task = rpc_run_task(&task_setup);
588 if (IS_ERR(task))
589 ret = PTR_ERR(task);
590 else {
591 ret = task->tk_status;
592 rpc_put_task(task);
593 }
594 return ret;
595}
596
cccef3b9
AA
597int _nfs4_call_sync_session(struct nfs_server *server,
598 struct rpc_message *msg,
599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
601 int cache_reply)
602{
ce5039c1
AA
603 return nfs4_call_sync_sequence(server->nfs_client, server->client,
604 msg, args, res, cache_reply);
cccef3b9
AA
605}
606
607#endif /* CONFIG_NFS_V4_1 */
608
609int _nfs4_call_sync(struct nfs_server *server,
610 struct rpc_message *msg,
611 struct nfs4_sequence_args *args,
612 struct nfs4_sequence_res *res,
613 int cache_reply)
614{
f3752975 615 args->sa_session = res->sr_session = NULL;
cccef3b9
AA
616 return rpc_call_sync(server->client, msg, 0);
617}
618
619#define nfs4_call_sync(server, msg, args, res, cache_reply) \
620 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
621 &(res)->seq_res, (cache_reply))
622
b0df806c
AA
623static void nfs4_sequence_done(const struct nfs_server *server,
624 struct nfs4_sequence_res *res, int rpc_status)
625{
626#ifdef CONFIG_NFS_V4_1
627 if (nfs4_has_session(server->nfs_client))
628 nfs41_sequence_done(server->nfs_client, res, rpc_status);
629#endif /* CONFIG_NFS_V4_1 */
630}
631
632/* no restart, therefore free slot here */
633static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
634 struct nfs4_sequence_res *res,
635 int rpc_status)
636{
637 nfs4_sequence_done(server, res, rpc_status);
638 nfs4_sequence_free_slot(server->nfs_client, res);
639}
640
38478b24 641static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 642{
38478b24 643 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 644
38478b24 645 spin_lock(&dir->i_lock);
40d24704
TM
646 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
647 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 648 nfs_force_lookup_revalidate(dir);
40d24704 649 nfsi->change_attr = cinfo->after;
38478b24 650 spin_unlock(&dir->i_lock);
1da177e4
LT
651}
652
e56e0b78 653struct nfs4_opendata {
c6d00e63 654 struct kref kref;
e56e0b78
TM
655 struct nfs_openargs o_arg;
656 struct nfs_openres o_res;
cdd4e68b
TM
657 struct nfs_open_confirmargs c_arg;
658 struct nfs_open_confirmres c_res;
e56e0b78
TM
659 struct nfs_fattr f_attr;
660 struct nfs_fattr dir_attr;
ad389da7 661 struct path path;
e56e0b78
TM
662 struct dentry *dir;
663 struct nfs4_state_owner *owner;
aac00a8d 664 struct nfs4_state *state;
e56e0b78 665 struct iattr attrs;
26e976a8 666 unsigned long timestamp;
3e309914 667 unsigned int rpc_done : 1;
24ac23ab
TM
668 int rpc_status;
669 int cancelled;
e56e0b78
TM
670};
671
2ced46c2
TM
672
673static void nfs4_init_opendata_res(struct nfs4_opendata *p)
674{
675 p->o_res.f_attr = &p->f_attr;
676 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM
677 p->o_res.seqid = p->o_arg.seqid;
678 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM
679 p->o_res.server = p->o_arg.server;
680 nfs_fattr_init(&p->f_attr);
681 nfs_fattr_init(&p->dir_attr);
682}
683
ad389da7 684static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 685 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM
686 const struct iattr *attrs)
687{
ad389da7 688 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM
689 struct inode *dir = parent->d_inode;
690 struct nfs_server *server = NFS_SERVER(dir);
691 struct nfs4_opendata *p;
692
693 p = kzalloc(sizeof(*p), GFP_KERNEL);
694 if (p == NULL)
695 goto err;
696 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697 if (p->o_arg.seqid == NULL)
698 goto err_free;
ad389da7
TM
699 p->path.mnt = mntget(path->mnt);
700 p->path.dentry = dget(path->dentry);
e56e0b78
TM
701 p->dir = parent;
702 p->owner = sp;
703 atomic_inc(&sp->so_count);
704 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM
705 p->o_arg.open_flags = flags;
706 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 707 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 708 p->o_arg.id = sp->so_owner_id.id;
ad389da7 709 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM
710 p->o_arg.server = server;
711 p->o_arg.bitmask = server->attr_bitmask;
712 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 713 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM
714 if (flags & O_EXCL) {
715 u32 *s = (u32 *) p->o_arg.u.verifier.data;
716 s[0] = jiffies;
717 s[1] = current->pid;
718 } else if (flags & O_CREAT) {
719 p->o_arg.u.attrs = &p->attrs;
720 memcpy(&p->attrs, attrs, sizeof(p->attrs));
721 }
cdd4e68b
TM
722 p->c_arg.fh = &p->o_res.fh;
723 p->c_arg.stateid = &p->o_res.stateid;
724 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 725 nfs4_init_opendata_res(p);
c6d00e63 726 kref_init(&p->kref);
e56e0b78
TM
727 return p;
728err_free:
729 kfree(p);
730err:
731 dput(parent);
732 return NULL;
733}
734
c6d00e63 735static void nfs4_opendata_free(struct kref *kref)
e56e0b78 736{
c6d00e63
TM
737 struct nfs4_opendata *p = container_of(kref,
738 struct nfs4_opendata, kref);
739
740 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM
741 if (p->state != NULL)
742 nfs4_put_open_state(p->state);
c6d00e63
TM
743 nfs4_put_state_owner(p->owner);
744 dput(p->dir);
31f31db1 745 path_put(&p->path);
c6d00e63
TM
746 kfree(p);
747}
748
749static void nfs4_opendata_put(struct nfs4_opendata *p)
750{
751 if (p != NULL)
752 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM
753}
754
06f814a3
TM
755static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
756{
06f814a3
TM
757 int ret;
758
06f814a3 759 ret = rpc_wait_for_completion_task(task);
06f814a3
TM
760 return ret;
761}
762
dc0b027d 763static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM
764{
765 int ret = 0;
dc0b027d
TM
766
767 if (open_mode & O_EXCL)
768 goto out;
769 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM
770 case FMODE_READ:
771 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM
772 break;
773 case FMODE_WRITE:
774 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM
775 break;
776 case FMODE_READ|FMODE_WRITE:
777 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
778 }
dc0b027d 779out:
6ee41268
TM
780 return ret;
781}
782
dc0b027d 783static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 784{
dc0b027d 785 if ((delegation->type & fmode) != fmode)
aac00a8d 786 return 0;
15c831bf 787 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 788 return 0;
b7391f44 789 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM
790 return 1;
791}
792
dc0b027d 793static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 794{
dc0b027d 795 switch (fmode) {
e7616923
TM
796 case FMODE_WRITE:
797 state->n_wronly++;
798 break;
799 case FMODE_READ:
800 state->n_rdonly++;
801 break;
802 case FMODE_READ|FMODE_WRITE:
803 state->n_rdwr++;
804 }
dc0b027d 805 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM
806}
807
dc0b027d 808static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM
809{
810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
811 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
812 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 813 switch (fmode) {
003707c7
TM
814 case FMODE_READ:
815 set_bit(NFS_O_RDONLY_STATE, &state->flags);
816 break;
817 case FMODE_WRITE:
818 set_bit(NFS_O_WRONLY_STATE, &state->flags);
819 break;
820 case FMODE_READ|FMODE_WRITE:
821 set_bit(NFS_O_RDWR_STATE, &state->flags);
822 }
e7616923
TM
823}
824
dc0b027d 825static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 826{
8bda4e4c 827 write_seqlock(&state->seqlock);
dc0b027d 828 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 829 write_sequnlock(&state->seqlock);
003707c7
TM
830}
831
dc0b027d 832static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 833{
8bda4e4c
TM
834 /*
835 * Protect the call to nfs4_state_set_mode_locked and
836 * serialise the stateid update
837 */
838 write_seqlock(&state->seqlock);
003707c7
TM
839 if (deleg_stateid != NULL) {
840 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
841 set_bit(NFS_DELEGATED_STATE, &state->flags);
842 }
843 if (open_stateid != NULL)
dc0b027d 844 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM
845 write_sequnlock(&state->seqlock);
846 spin_lock(&state->owner->so_lock);
dc0b027d 847 update_open_stateflags(state, fmode);
ec073428 848 spin_unlock(&state->owner->so_lock);
1da177e4
LT
849}
850
dc0b027d 851static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM
852{
853 struct nfs_inode *nfsi = NFS_I(state->inode);
854 struct nfs_delegation *deleg_cur;
855 int ret = 0;
856
dc0b027d 857 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM
858
859 rcu_read_lock();
860 deleg_cur = rcu_dereference(nfsi->delegation);
861 if (deleg_cur == NULL)
862 goto no_delegation;
863
864 spin_lock(&deleg_cur->lock);
865 if (nfsi->delegation != deleg_cur ||
dc0b027d 866 (deleg_cur->type & fmode) != fmode)
34310430
TM
867 goto no_delegation_unlock;
868
869 if (delegation == NULL)
870 delegation = &deleg_cur->stateid;
871 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
872 goto no_delegation_unlock;
873
b7391f44 874 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 875 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM
876 ret = 1;
877no_delegation_unlock:
878 spin_unlock(&deleg_cur->lock);
879no_delegation:
880 rcu_read_unlock();
881
882 if (!ret && open_stateid != NULL) {
dc0b027d 883 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM
884 ret = 1;
885 }
886
887 return ret;
888}
889
890
dc0b027d 891static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM
892{
893 struct nfs_delegation *delegation;
894
895 rcu_read_lock();
896 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 897 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM
898 rcu_read_unlock();
899 return;
900 }
901 rcu_read_unlock();
902 nfs_inode_return_delegation(inode);
903}
904
6ee41268 905static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM
906{
907 struct nfs4_state *state = opendata->state;
908 struct nfs_inode *nfsi = NFS_I(state->inode);
909 struct nfs_delegation *delegation;
dc0b027d
TM
910 int open_mode = opendata->o_arg.open_flags & O_EXCL;
911 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM
912 nfs4_stateid stateid;
913 int ret = -EAGAIN;
914
aac00a8d 915 for (;;) {
dc0b027d 916 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 917 spin_lock(&state->owner->so_lock);
dc0b027d
TM
918 if (can_open_cached(state, fmode, open_mode)) {
919 update_open_stateflags(state, fmode);
6ee41268 920 spin_unlock(&state->owner->so_lock);
6ee41268
TM
921 goto out_return_state;
922 }
923 spin_unlock(&state->owner->so_lock);
924 }
34310430
TM
925 rcu_read_lock();
926 delegation = rcu_dereference(nfsi->delegation);
927 if (delegation == NULL ||
dc0b027d 928 !can_open_delegated(delegation, fmode)) {
34310430 929 rcu_read_unlock();
aac00a8d 930 break;
34310430 931 }
aac00a8d
TM
932 /* Save the delegation */
933 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
934 rcu_read_unlock();
af22f94a 935 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM
936 if (ret != 0)
937 goto out;
938 ret = -EAGAIN;
34310430
TM
939
940 /* Try to update the stateid using the delegation */
dc0b027d 941 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 942 goto out_return_state;
aac00a8d 943 }
aac00a8d
TM
944out:
945 return ERR_PTR(ret);
946out_return_state:
947 atomic_inc(&state->count);
948 return state;
949}
950
24ac23ab
TM
951static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
952{
953 struct inode *inode;
954 struct nfs4_state *state = NULL;
003707c7 955 struct nfs_delegation *delegation;
1b370bc2 956 int ret;
24ac23ab 957
aac00a8d 958 if (!data->rpc_done) {
6ee41268 959 state = nfs4_try_open_cached(data);
aac00a8d
TM
960 goto out;
961 }
962
1b370bc2 963 ret = -EAGAIN;
24ac23ab 964 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 965 goto err;
24ac23ab 966 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 967 ret = PTR_ERR(inode);
03f28e3a 968 if (IS_ERR(inode))
1b370bc2
TM
969 goto err;
970 ret = -ENOMEM;
24ac23ab
TM
971 state = nfs4_get_open_state(inode, data->owner);
972 if (state == NULL)
1b370bc2 973 goto err_put_inode;
549d6ed5 974 if (data->o_res.delegation_type != 0) {
549d6ed5
TM
975 int delegation_flags = 0;
976
003707c7
TM
977 rcu_read_lock();
978 delegation = rcu_dereference(NFS_I(inode)->delegation);
979 if (delegation)
980 delegation_flags = delegation->flags;
981 rcu_read_unlock();
15c831bf 982 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM
983 nfs_inode_set_delegation(state->inode,
984 data->owner->so_cred,
985 &data->o_res);
986 else
987 nfs_inode_reclaim_delegation(state->inode,
988 data->owner->so_cred,
989 &data->o_res);
990 }
34310430
TM
991
992 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 993 data->o_arg.fmode);
24ac23ab 994 iput(inode);
aac00a8d 995out:
24ac23ab 996 return state;
1b370bc2
TM
997err_put_inode:
998 iput(inode);
999err:
1000 return ERR_PTR(ret);
24ac23ab
TM
1001}
1002
864472e9
TM
1003static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1004{
1005 struct nfs_inode *nfsi = NFS_I(state->inode);
1006 struct nfs_open_context *ctx;
1007
1008 spin_lock(&state->inode->i_lock);
1009 list_for_each_entry(ctx, &nfsi->open_files, list) {
1010 if (ctx->state != state)
1011 continue;
1012 get_nfs_open_context(ctx);
1013 spin_unlock(&state->inode->i_lock);
1014 return ctx;
1015 }
1016 spin_unlock(&state->inode->i_lock);
1017 return ERR_PTR(-ENOENT);
1018}
1019
6f220ed5
TM
1020static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1021{
1022 struct nfs4_opendata *opendata;
1023
dc0b027d 1024 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM
1025 if (opendata == NULL)
1026 return ERR_PTR(-ENOMEM);
1027 opendata->state = state;
1028 atomic_inc(&state->count);
1029 return opendata;
1030}
1031
dc0b027d 1032static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1033{
2ced46c2 1034 struct nfs4_state *newstate;
864472e9
TM
1035 int ret;
1036
dc0b027d
TM
1037 opendata->o_arg.open_flags = 0;
1038 opendata->o_arg.fmode = fmode;
2ced46c2
TM
1039 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1040 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1041 nfs4_init_opendata_res(opendata);
864472e9
TM
1042 ret = _nfs4_proc_open(opendata);
1043 if (ret != 0)
1044 return ret;
2ced46c2 1045 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM
1046 if (IS_ERR(newstate))
1047 return PTR_ERR(newstate);
dc0b027d 1048 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1049 *res = newstate;
864472e9
TM
1050 return 0;
1051}
1052
1053static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1054{
864472e9 1055 struct nfs4_state *newstate;
864472e9
TM
1056 int ret;
1057
1058 /* memory barrier prior to reading state->n_* */
2ced46c2 1059 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM
1060 smp_rmb();
1061 if (state->n_rdwr != 0) {
2ced46c2 1062 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM
1063 if (ret != 0)
1064 return ret;
2ced46c2
TM
1065 if (newstate != state)
1066 return -ESTALE;
864472e9
TM
1067 }
1068 if (state->n_wronly != 0) {
2ced46c2 1069 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM
1070 if (ret != 0)
1071 return ret;
2ced46c2
TM
1072 if (newstate != state)
1073 return -ESTALE;
864472e9
TM
1074 }
1075 if (state->n_rdonly != 0) {
2ced46c2 1076 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM
1077 if (ret != 0)
1078 return ret;
2ced46c2
TM
1079 if (newstate != state)
1080 return -ESTALE;
864472e9 1081 }
1ac7e2fd
TM
1082 /*
1083 * We may have performed cached opens for all three recoveries.
1084 * Check if we need to update the current stateid.
1085 */
1086 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1087 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1088 write_seqlock(&state->seqlock);
1ac7e2fd
TM
1089 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1090 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1091 write_sequnlock(&state->seqlock);
1ac7e2fd 1092 }
864472e9
TM
1093 return 0;
1094}
1095
1da177e4
LT
1096/*
1097 * OPEN_RECLAIM:
1098 * reclaim state on the server after a reboot.
1da177e4 1099 */
539cd03a 1100static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1101{
1ac7e2fd 1102 struct nfs_delegation *delegation;
864472e9 1103 struct nfs4_opendata *opendata;
dc0b027d 1104 fmode_t delegation_type = 0;
1da177e4
LT
1105 int status;
1106
6f220ed5
TM
1107 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1108 if (IS_ERR(opendata))
1109 return PTR_ERR(opendata);
864472e9
TM
1110 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1111 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM
1112 rcu_read_lock();
1113 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1114 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1115 delegation_type = delegation->type;
1ac7e2fd 1116 rcu_read_unlock();
864472e9
TM
1117 opendata->o_arg.u.delegation_type = delegation_type;
1118 status = nfs4_open_recover(opendata, state);
c6d00e63 1119 nfs4_opendata_put(opendata);
1da177e4
LT
1120 return status;
1121}
1122
539cd03a 1123static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT
1124{
1125 struct nfs_server *server = NFS_SERVER(state->inode);
1126 struct nfs4_exception exception = { };
1127 int err;
1128 do {
539cd03a 1129 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM
1130 if (err != -NFS4ERR_DELAY)
1131 break;
1132 nfs4_handle_exception(server, err, &exception);
1da177e4
LT
1133 } while (exception.retry);
1134 return err;
1135}
1136
864472e9
TM
1137static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1138{
1139 struct nfs_open_context *ctx;
1140 int ret;
1141
1142 ctx = nfs4_state_find_open_context(state);
1143 if (IS_ERR(ctx))
1144 return PTR_ERR(ctx);
539cd03a 1145 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM
1146 put_nfs_open_context(ctx);
1147 return ret;
1148}
1149
13437e12 1150static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1151{
e56e0b78 1152 struct nfs4_opendata *opendata;
864472e9 1153 int ret;
1da177e4 1154
6f220ed5
TM
1155 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1156 if (IS_ERR(opendata))
1157 return PTR_ERR(opendata);
e56e0b78 1158 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1159 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1160 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1161 ret = nfs4_open_recover(opendata, state);
c6d00e63 1162 nfs4_opendata_put(opendata);
864472e9 1163 return ret;
1da177e4
LT
1164}
1165
13437e12 1166int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT
1167{
1168 struct nfs4_exception exception = { };
539cd03a 1169 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT
1170 int err;
1171 do {
13437e12 1172 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT
1173 switch (err) {
1174 case 0:
1175 return err;
1176 case -NFS4ERR_STALE_CLIENTID:
1177 case -NFS4ERR_STALE_STATEID:
1178 case -NFS4ERR_EXPIRED:
1179 /* Don't recall a delegation if it was lost */
7539bbab 1180 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT
1181 return err;
1182 }
1183 err = nfs4_handle_exception(server, err, &exception);
1184 } while (exception.retry);
1185 return err;
1186}
1187
cdd4e68b
TM
1188static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1189{
1190 struct nfs4_opendata *data = calldata;
1191
1192 data->rpc_status = task->tk_status;
1193 if (RPC_ASSASSINATED(task))
1194 return;
26e976a8 1195 if (data->rpc_status == 0) {
cdd4e68b
TM
1196 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1197 sizeof(data->o_res.stateid.data));
bb22629e 1198 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1199 renew_lease(data->o_res.server, data->timestamp);
3e309914 1200 data->rpc_done = 1;
26e976a8 1201 }
cdd4e68b
TM
1202}
1203
1204static void nfs4_open_confirm_release(void *calldata)
1205{
1206 struct nfs4_opendata *data = calldata;
1207 struct nfs4_state *state = NULL;
1208
1209 /* If this request hasn't been cancelled, do nothing */
1210 if (data->cancelled == 0)
1211 goto out_free;
1212 /* In case of error, no cleanup! */
3e309914 1213 if (!data->rpc_done)
cdd4e68b 1214 goto out_free;
cdd4e68b 1215 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1216 if (!IS_ERR(state))
dc0b027d 1217 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1218out_free:
c6d00e63 1219 nfs4_opendata_put(data);
cdd4e68b
TM
1220}
1221
1222static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM
1223 .rpc_call_done = nfs4_open_confirm_done,
1224 .rpc_release = nfs4_open_confirm_release,
1225};
1226
1227/*
1228 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1229 */
1230static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1231{
1232 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1233 struct rpc_task *task;
5138fde0
TM
1234 struct rpc_message msg = {
1235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1236 .rpc_argp = &data->c_arg,
1237 .rpc_resp = &data->c_res,
1238 .rpc_cred = data->owner->so_cred,
1239 };
c970aa85
TM
1240 struct rpc_task_setup task_setup_data = {
1241 .rpc_client = server->client,
5138fde0 1242 .rpc_message = &msg,
c970aa85
TM
1243 .callback_ops = &nfs4_open_confirm_ops,
1244 .callback_data = data,
101070ca 1245 .workqueue = nfsiod_workqueue,
c970aa85
TM
1246 .flags = RPC_TASK_ASYNC,
1247 };
1da177e4
LT
1248 int status;
1249
c6d00e63 1250 kref_get(&data->kref);
3e309914
TM
1251 data->rpc_done = 0;
1252 data->rpc_status = 0;
5138fde0 1253 data->timestamp = jiffies;
c970aa85 1254 task = rpc_run_task(&task_setup_data);
7a1218a2 1255 if (IS_ERR(task))
cdd4e68b 1256 return PTR_ERR(task);
cdd4e68b
TM
1257 status = nfs4_wait_for_completion_rpc_task(task);
1258 if (status != 0) {
1259 data->cancelled = 1;
1260 smp_wmb();
1261 } else
1262 status = data->rpc_status;
e6b3c4db 1263 rpc_put_task(task);
1da177e4
LT
1264 return status;
1265}
1266
24ac23ab 1267static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1268{
24ac23ab
TM
1269 struct nfs4_opendata *data = calldata;
1270 struct nfs4_state_owner *sp = data->owner;
5138fde0 1271
24ac23ab
TM
1272 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1273 return;
aac00a8d
TM
1274 /*
1275 * Check if we still need to send an OPEN call, or if we can use
1276 * a delegation instead.
1277 */
1278 if (data->state != NULL) {
1279 struct nfs_delegation *delegation;
1280
dc0b027d 1281 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1282 goto out_no_action;
aac00a8d
TM
1283 rcu_read_lock();
1284 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1285 if (delegation != NULL &&
15c831bf 1286 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1287 rcu_read_unlock();
6ee41268 1288 goto out_no_action;
aac00a8d
TM
1289 }
1290 rcu_read_unlock();
1291 }
24ac23ab 1292 /* Update sequence id. */
9f958ab8 1293 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1294 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1295 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1296 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM
1297 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1298 }
26e976a8 1299 data->timestamp = jiffies;
d898528c
AA
1300 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1301 &data->o_arg.seq_args,
1302 &data->o_res.seq_res, 1, task))
1303 return;
5138fde0 1304 rpc_call_start(task);
6ee41268
TM
1305 return;
1306out_no_action:
1307 task->tk_action = NULL;
1308
24ac23ab 1309}
1da177e4 1310
24ac23ab
TM
1311static void nfs4_open_done(struct rpc_task *task, void *calldata)
1312{
1313 struct nfs4_opendata *data = calldata;
1da177e4 1314
24ac23ab 1315 data->rpc_status = task->tk_status;
d898528c
AA
1316
1317 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1318 task->tk_status);
1319
24ac23ab
TM
1320 if (RPC_ASSASSINATED(task))
1321 return;
1322 if (task->tk_status == 0) {
1323 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM
1324 case S_IFREG:
1325 break;
1326 case S_IFLNK:
24ac23ab 1327 data->rpc_status = -ELOOP;
6f926b5b
TM
1328 break;
1329 case S_IFDIR:
24ac23ab 1330 data->rpc_status = -EISDIR;
6f926b5b
TM
1331 break;
1332 default:
24ac23ab 1333 data->rpc_status = -ENOTDIR;
6f926b5b 1334 }
26e976a8 1335 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM
1336 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1337 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1338 }
3e309914 1339 data->rpc_done = 1;
24ac23ab 1340}
6f926b5b 1341
24ac23ab
TM
1342static void nfs4_open_release(void *calldata)
1343{
1344 struct nfs4_opendata *data = calldata;
1345 struct nfs4_state *state = NULL;
1346
1347 /* If this request hasn't been cancelled, do nothing */
1348 if (data->cancelled == 0)
1349 goto out_free;
1350 /* In case of error, no cleanup! */
3e309914 1351 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM
1352 goto out_free;
1353 /* In case we need an open_confirm, no cleanup! */
1354 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1355 goto out_free;
24ac23ab 1356 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1357 if (!IS_ERR(state))
dc0b027d 1358 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1359out_free:
c6d00e63 1360 nfs4_opendata_put(data);
24ac23ab
TM
1361}
1362
1363static const struct rpc_call_ops nfs4_open_ops = {
1364 .rpc_call_prepare = nfs4_open_prepare,
1365 .rpc_call_done = nfs4_open_done,
1366 .rpc_release = nfs4_open_release,
1367};
1368
1369/*
1370 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1371 */
1372static int _nfs4_proc_open(struct nfs4_opendata *data)
1373{
1374 struct inode *dir = data->dir->d_inode;
1375 struct nfs_server *server = NFS_SERVER(dir);
1376 struct nfs_openargs *o_arg = &data->o_arg;
1377 struct nfs_openres *o_res = &data->o_res;
1378 struct rpc_task *task;
5138fde0
TM
1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1381 .rpc_argp = o_arg,
1382 .rpc_resp = o_res,
1383 .rpc_cred = data->owner->so_cred,
1384 };
c970aa85
TM
1385 struct rpc_task_setup task_setup_data = {
1386 .rpc_client = server->client,
5138fde0 1387 .rpc_message = &msg,
c970aa85
TM
1388 .callback_ops = &nfs4_open_ops,
1389 .callback_data = data,
101070ca 1390 .workqueue = nfsiod_workqueue,
c970aa85
TM
1391 .flags = RPC_TASK_ASYNC,
1392 };
24ac23ab
TM
1393 int status;
1394
c6d00e63 1395 kref_get(&data->kref);
3e309914
TM
1396 data->rpc_done = 0;
1397 data->rpc_status = 0;
2ced46c2 1398 data->cancelled = 0;
c970aa85 1399 task = rpc_run_task(&task_setup_data);
7a1218a2 1400 if (IS_ERR(task))
24ac23ab 1401 return PTR_ERR(task);
24ac23ab
TM
1402 status = nfs4_wait_for_completion_rpc_task(task);
1403 if (status != 0) {
1404 data->cancelled = 1;
1405 smp_wmb();
1406 } else
1407 status = data->rpc_status;
e6b3c4db 1408 rpc_put_task(task);
3e309914 1409 if (status != 0 || !data->rpc_done)
24ac23ab
TM
1410 return status;
1411
9936781d
TM
1412 if (o_res->fh.size == 0)
1413 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1414
56ae19f3
TM
1415 if (o_arg->open_flags & O_CREAT) {
1416 update_changeattr(dir, &o_res->cinfo);
1417 nfs_post_op_update_inode(dir, o_res->dir_attr);
1418 } else
1419 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1420 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1421 status = _nfs4_proc_open_confirm(data);
1da177e4 1422 if (status != 0)
24ac23ab 1423 return status;
1da177e4
LT
1424 }
1425 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1426 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1427 return 0;
1da177e4
LT
1428}
1429
10afec90 1430static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1431{
7539bbab 1432 struct nfs_client *clp = server->nfs_client;
6b30954e 1433 int ret;
58d9714a 1434
6b30954e 1435 for (;;) {
65de872e 1436 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM
1437 if (ret != 0)
1438 return ret;
e598d843
TM
1439 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1440 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1441 break;
58d9714a 1442 nfs4_schedule_state_recovery(clp);
6b30954e
TM
1443 }
1444 return 0;
58d9714a
TM
1445}
1446
1da177e4
LT
1447/*
1448 * OPEN_EXPIRED:
1449 * reclaim state on the server after a network partition.
1450 * Assumes caller holds the appropriate lock
1451 */
539cd03a 1452static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1453{
e56e0b78 1454 struct nfs4_opendata *opendata;
864472e9 1455 int ret;
1da177e4 1456
6f220ed5
TM
1457 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1458 if (IS_ERR(opendata))
1459 return PTR_ERR(opendata);
864472e9 1460 ret = nfs4_open_recover(opendata, state);
35d05778 1461 if (ret == -ESTALE)
539cd03a 1462 d_drop(ctx->path.dentry);
c6d00e63 1463 nfs4_opendata_put(opendata);
864472e9 1464 return ret;
1da177e4
LT
1465}
1466
539cd03a 1467static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1468{
539cd03a 1469 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM
1470 struct nfs4_exception exception = { };
1471 int err;
1472
1473 do {
539cd03a 1474 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM
1475 if (err != -NFS4ERR_DELAY)
1476 break;
1477 nfs4_handle_exception(server, err, &exception);
202b50dc
TM
1478 } while (exception.retry);
1479 return err;
1480}
1481
1da177e4
LT
1482static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1483{
1da177e4 1484 struct nfs_open_context *ctx;
864472e9 1485 int ret;
1da177e4 1486
864472e9
TM
1487 ctx = nfs4_state_find_open_context(state);
1488 if (IS_ERR(ctx))
1489 return PTR_ERR(ctx);
539cd03a 1490 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM
1491 put_nfs_open_context(ctx);
1492 return ret;
1da177e4
LT
1493}
1494
aa53ed54
JL
1495/*
1496 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1497 * fields corresponding to attributes that were used to store the verifier.
1498 * Make sure we clobber those fields in the later setattr call
1499 */
1500static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1501{
1502 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1503 !(sattr->ia_valid & ATTR_ATIME_SET))
1504 sattr->ia_valid |= ATTR_ATIME;
1505
1506 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1507 !(sattr->ia_valid & ATTR_MTIME_SET))
1508 sattr->ia_valid |= ATTR_MTIME;
1509}
1510
1da177e4 1511/*
24ac23ab 1512 * Returns a referenced nfs4_state
1da177e4 1513 */
dc0b027d 1514static 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
1515{
1516 struct nfs4_state_owner *sp;
1517 struct nfs4_state *state = NULL;
1518 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1519 struct nfs4_opendata *opendata;
aac00a8d 1520 int status;
1da177e4
LT
1521
1522 /* Protect against reboot recovery conflicts */
1da177e4
LT
1523 status = -ENOMEM;
1524 if (!(sp = nfs4_get_state_owner(server, cred))) {
1525 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1526 goto out_err;
1527 }
58d9714a
TM
1528 status = nfs4_recover_expired_lease(server);
1529 if (status != 0)
b4454fe1 1530 goto err_put_state_owner;
aac00a8d 1531 if (path->dentry->d_inode != NULL)
dc0b027d 1532 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1533 status = -ENOMEM;
dc0b027d 1534 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1535 if (opendata == NULL)
95d35cb4 1536 goto err_put_state_owner;
1da177e4 1537
aac00a8d
TM
1538 if (path->dentry->d_inode != NULL)
1539 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1540
24ac23ab 1541 status = _nfs4_proc_open(opendata);
1da177e4 1542 if (status != 0)
c6d00e63 1543 goto err_opendata_put;
1da177e4 1544
aa53ed54
JL
1545 if (opendata->o_arg.open_flags & O_EXCL)
1546 nfs4_exclusive_attrset(opendata, sattr);
1547
24ac23ab 1548 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM
1549 status = PTR_ERR(state);
1550 if (IS_ERR(state))
c6d00e63 1551 goto err_opendata_put;
c6d00e63 1552 nfs4_opendata_put(opendata);
1da177e4 1553 nfs4_put_state_owner(sp);
1da177e4
LT
1554 *res = state;
1555 return 0;
c6d00e63
TM
1556err_opendata_put:
1557 nfs4_opendata_put(opendata);
e56e0b78
TM
1558err_put_state_owner:
1559 nfs4_put_state_owner(sp);
1da177e4 1560out_err:
1da177e4
LT
1561 *res = NULL;
1562 return status;
1563}
1564
1565
dc0b027d 1566static 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
1567{
1568 struct nfs4_exception exception = { };
1569 struct nfs4_state *res;
1570 int status;
1571
1572 do {
dc0b027d 1573 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT
1574 if (status == 0)
1575 break;
1576 /* NOTE: BAD_SEQID means the server and client disagree about the
1577 * book-keeping w.r.t. state-changing operations
1578 * (OPEN/CLOSE/LOCK/LOCKU...)
1579 * It is actually a sign of a bug on the client or on the server.
1580 *
1581 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1582 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT
1583 * have unhashed the old state_owner for us, and that we can
1584 * therefore safely retry using a new one. We should still warn
1585 * the user though...
1586 */
1587 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM
1588 printk(KERN_WARNING "NFS: v4 server %s "
1589 " returned a bad sequence-id error!\n",
1590 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT
1591 exception.retry = 1;
1592 continue;
1593 }
550f5747
TM
1594 /*
1595 * BAD_STATEID on OPEN means that the server cancelled our
1596 * state before it received the OPEN_CONFIRM.
1597 * Recover by retrying the request as per the discussion
1598 * on Page 181 of RFC3530.
1599 */
1600 if (status == -NFS4ERR_BAD_STATEID) {
1601 exception.retry = 1;
1602 continue;
1603 }
aac00a8d
TM
1604 if (status == -EAGAIN) {
1605 /* We must have found a delegation */
1606 exception.retry = 1;
1607 continue;
1608 }
1da177e4
LT
1609 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1610 status, &exception));
1611 } while (exception.retry);
1612 return res;
1613}
1614
659bfcd6
TM
1615static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1616 struct nfs_fattr *fattr, struct iattr *sattr,
1617 struct nfs4_state *state)
1da177e4 1618{
3e4f6290 1619 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1620 struct nfs_setattrargs arg = {
3e4f6290 1621 .fh = NFS_FH(inode),
1da177e4
LT
1622 .iap = sattr,
1623 .server = server,
1624 .bitmask = server->attr_bitmask,
1625 };
1626 struct nfs_setattrres res = {
1627 .fattr = fattr,
1628 .server = server,
1629 };
1630 struct rpc_message msg = {
659bfcd6
TM
1631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1632 .rpc_argp = &arg,
1633 .rpc_resp = &res,
1634 .rpc_cred = cred,
1da177e4 1635 };
26e976a8 1636 unsigned long timestamp = jiffies;
65e4308d 1637 int status;
1da177e4 1638
0e574af1 1639 nfs_fattr_init(fattr);
1da177e4 1640
3e4f6290
TM
1641 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1642 /* Use that stateid */
1643 } else if (state != NULL) {
08e9eac4
TM
1644 nfs4_copy_stateid(&arg.stateid, state, current->files);
1645 } else
1da177e4
LT
1646 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1647
cccef3b9 1648 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM
1649 if (status == 0 && state != NULL)
1650 renew_lease(server, timestamp);
65e4308d 1651 return status;
1da177e4
LT
1652}
1653
659bfcd6
TM
1654static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1655 struct nfs_fattr *fattr, struct iattr *sattr,
1656 struct nfs4_state *state)
1da177e4 1657{
3e4f6290 1658 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
1659 struct nfs4_exception exception = { };
1660 int err;
1661 do {
1662 err = nfs4_handle_exception(server,
659bfcd6 1663 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT
1664 &exception);
1665 } while (exception.retry);
1666 return err;
1667}
1668
1669struct nfs4_closedata {
4a35bd41 1670 struct path path;
1da177e4
LT
1671 struct inode *inode;
1672 struct nfs4_state *state;
1673 struct nfs_closeargs arg;
1674 struct nfs_closeres res;
516a6af6 1675 struct nfs_fattr fattr;
26e976a8 1676 unsigned long timestamp;
1da177e4
LT
1677};
1678
963d8fe5 1679static void nfs4_free_closedata(void *data)
9512135d 1680{
963d8fe5
TM
1681 struct nfs4_closedata *calldata = data;
1682 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM
1683
1684 nfs4_put_open_state(calldata->state);
1685 nfs_free_seqid(calldata->arg.seqid);
9512135d 1686 nfs4_put_state_owner(sp);
31f31db1 1687 path_put(&calldata->path);
9512135d
TM
1688 kfree(calldata);
1689}
1690
963d8fe5 1691static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1692{
963d8fe5 1693 struct nfs4_closedata *calldata = data;
1da177e4 1694 struct nfs4_state *state = calldata->state;
1da177e4
LT
1695 struct nfs_server *server = NFS_SERVER(calldata->inode);
1696
19ddab06 1697 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM
1698 if (RPC_ASSASSINATED(task))
1699 return;
1da177e4
LT
1700 /* hmm. we are done with the inode, and in the process of freeing
1701 * the state_owner. we keep this around to process errors
1702 */
1da177e4
LT
1703 switch (task->tk_status) {
1704 case 0:
45328c35 1705 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1706 renew_lease(server, calldata->timestamp);
1da177e4
LT
1707 break;
1708 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM
1709 case -NFS4ERR_OLD_STATEID:
1710 case -NFS4ERR_BAD_STATEID:
1da177e4 1711 case -NFS4ERR_EXPIRED:
dc0b027d 1712 if (calldata->arg.fmode == 0)
9e33bed5 1713 break;
1da177e4 1714 default:
9e33bed5 1715 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1716 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT
1717 return;
1718 }
1719 }
19ddab06 1720 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1721 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT
1722}
1723
4ce70ada 1724static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1725{
4ce70ada 1726 struct nfs4_closedata *calldata = data;
9512135d 1727 struct nfs4_state *state = calldata->state;
003707c7 1728 int clear_rd, clear_wr, clear_rdwr;
9512135d 1729
963d8fe5 1730 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1731 return;
003707c7 1732
003707c7 1733 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1734 spin_lock(&state->owner->so_lock);
003707c7 1735 /* Calculate the change in open mode */
e7616923 1736 if (state->n_rdwr == 0) {
003707c7 1737 if (state->n_rdonly == 0) {
003707c7
TM
1738 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1739 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1740 }
1741 if (state->n_wronly == 0) {
003707c7
TM
1742 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1743 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1744 }
e7616923 1745 }
4cecb76f 1746 spin_unlock(&state->owner->so_lock);
003707c7 1747 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM
1748 /* Note: exit _without_ calling nfs4_close_done */
1749 task->tk_action = NULL;
9512135d
TM
1750 return;
1751 }
516a6af6 1752 nfs_fattr_init(calldata->res.fattr);
45328c35 1753 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1754 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1755 calldata->arg.fmode = FMODE_READ;
45328c35 1756 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1757 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1758 calldata->arg.fmode = FMODE_WRITE;
45328c35 1759 }
26e976a8 1760 calldata->timestamp = jiffies;
19ddab06
AA
1761 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1762 &calldata->arg.seq_args, &calldata->res.seq_res,
1763 1, task))
1764 return;
5138fde0 1765 rpc_call_start(task);
1da177e4
LT
1766}
1767
963d8fe5 1768static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1769 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM
1770 .rpc_call_done = nfs4_close_done,
1771 .rpc_release = nfs4_free_closedata,
1772};
1773
1da177e4
LT
1774/*
1775 * It is possible for data to be read/written from a mem-mapped file
1776 * after the sys_close call (which hits the vfs layer as a flush).
1777 * This means that we can't safely call nfsv4 close on a file until
1778 * the inode is cleared. This in turn means that we are not good
1779 * NFSv4 citizens - we do not indicate to the server to update the file's
1780 * share state even when we are done with one of the three share
1781 * stateid's in the inode.
1782 *
1783 * NOTE: Caller must be holding the sp->so_owner semaphore!
1784 */
a49c3c77 1785int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1786{
4a35bd41 1787 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1788 struct nfs4_closedata *calldata;
b39e625b
TM
1789 struct nfs4_state_owner *sp = state->owner;
1790 struct rpc_task *task;
5138fde0
TM
1791 struct rpc_message msg = {
1792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1793 .rpc_cred = state->owner->so_cred,
1794 };
c970aa85
TM
1795 struct rpc_task_setup task_setup_data = {
1796 .rpc_client = server->client,
5138fde0 1797 .rpc_message = &msg,
c970aa85 1798 .callback_ops = &nfs4_close_ops,
101070ca 1799 .workqueue = nfsiod_workqueue,
c970aa85
TM
1800 .flags = RPC_TASK_ASYNC,
1801 };
9512135d 1802 int status = -ENOMEM;
1da177e4 1803
19ddab06 1804 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1805 if (calldata == NULL)
9512135d 1806 goto out;
4a35bd41 1807 calldata->inode = state->inode;
1da177e4 1808 calldata->state = state;
4a35bd41 1809 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1810 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH
1811 if (nfs4_has_session(server->nfs_client))
1812 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1813 /* Serialization for the sequence id */
cee54fc9 1814 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM
1815 if (calldata->arg.seqid == NULL)
1816 goto out_free_calldata;
dc0b027d 1817 calldata->arg.fmode = 0;
a65318bf 1818 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1819 calldata->res.fattr = &calldata->fattr;
c1d51931 1820 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1821 calldata->res.server = server;
5f7dbd5c 1822 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM
1823 calldata->path.mnt = mntget(path->mnt);
1824 calldata->path.dentry = dget(path->dentry);
9512135d 1825
5138fde0
TM
1826 msg.rpc_argp = &calldata->arg,
1827 msg.rpc_resp = &calldata->res,
c970aa85
TM
1828 task_setup_data.callback_data = calldata;
1829 task = rpc_run_task(&task_setup_data);
b39e625b
TM
1830 if (IS_ERR(task))
1831 return PTR_ERR(task);
a49c3c77
TM
1832 status = 0;
1833 if (wait)
1834 status = rpc_wait_for_completion_task(task);
b39e625b 1835 rpc_put_task(task);
a49c3c77 1836 return status;
9512135d
TM
1837out_free_calldata:
1838 kfree(calldata);
1839out:
b39e625b
TM
1840 nfs4_put_open_state(state);
1841 nfs4_put_state_owner(sp);
9512135d 1842 return status;
1da177e4
LT
1843}
1844
dc0b027d 1845static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM
1846{
1847 struct file *filp;
1b45c46c 1848 int ret;
02a913a7 1849
1b45c46c 1850 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1851 if (fmode & FMODE_EXEC) {
af22f94a 1852 ret = nfs_may_open(state->inode,
1b45c46c
TM
1853 state->owner->so_cred,
1854 nd->intent.open.flags);
1855 if (ret < 0)
1856 goto out_close;
1857 }
4a35bd41 1858 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM
1859 if (!IS_ERR(filp)) {
1860 struct nfs_open_context *ctx;
cd3758e3 1861 ctx = nfs_file_open_context(filp);
02a913a7 1862 ctx->state = state;
95cf959b
TM
1863 return 0;
1864 }
1b45c46c
TM
1865 ret = PTR_ERR(filp);
1866out_close:
dc0b027d 1867 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1868 return ret;
02a913a7
TM
1869}
1870
1871struct dentry *
1da177e4
LT
1872nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1873{
ad389da7 1874 struct path path = {
4ac91378 1875 .mnt = nd->path.mnt,
ad389da7
TM
1876 .dentry = dentry,
1877 };
4ac91378 1878 struct dentry *parent;
1da177e4
LT
1879 struct iattr attr;
1880 struct rpc_cred *cred;
1881 struct nfs4_state *state;
02a913a7 1882 struct dentry *res;
dc0b027d 1883 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT
1884
1885 if (nd->flags & LOOKUP_CREATE) {
1886 attr.ia_mode = nd->intent.open.create_mode;
1887 attr.ia_valid = ATTR_MODE;
1888 if (!IS_POSIXACL(dir))
ce3b0f8d 1889 attr.ia_mode &= ~current_umask();
1da177e4
LT
1890 } else {
1891 attr.ia_valid = 0;
1892 BUG_ON(nd->intent.open.flags & O_CREAT);
1893 }
1894
98a8e323 1895 cred = rpc_lookup_cred();
1da177e4 1896 if (IS_ERR(cred))
02a913a7 1897 return (struct dentry *)cred;
565277f6
TM
1898 parent = dentry->d_parent;
1899 /* Protect against concurrent sillydeletes */
1900 nfs_block_sillyrename(parent);
dc0b027d 1901 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1902 put_rpccred(cred);
02a913a7 1903 if (IS_ERR(state)) {
d75340cc 1904 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1905 d_add(dentry, NULL);
d75340cc
TM
1906 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1907 }
565277f6 1908 nfs_unblock_sillyrename(parent);
02a913a7
TM
1909 return (struct dentry *)state;
1910 }
24ac23ab 1911 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1912 if (res != NULL)
deee9369 1913 path.dentry = res;
d75340cc 1914 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1915 nfs_unblock_sillyrename(parent);
dc0b027d 1916 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1917 return res;
1da177e4
LT
1918}
1919
1920int
02a913a7 1921nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1922{
ad389da7 1923 struct path path = {
4ac91378 1924 .mnt = nd->path.mnt,
ad389da7
TM
1925 .dentry = dentry,
1926 };
1da177e4
LT
1927 struct rpc_cred *cred;
1928 struct nfs4_state *state;
dc0b027d 1929 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1930
98a8e323 1931 cred = rpc_lookup_cred();
1da177e4
LT
1932 if (IS_ERR(cred))
1933 return PTR_ERR(cred);
dc0b027d 1934 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1935 put_rpccred(cred);
02a913a7
TM
1936 if (IS_ERR(state)) {
1937 switch (PTR_ERR(state)) {
1938 case -EPERM:
1939 case -EACCES:
1940 case -EDQUOT:
1941 case -ENOSPC:
1942 case -EROFS:
1943 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1944 return 1;
b87c0adf
CL
1945 default:
1946 goto out_drop;
02a913a7 1947 }
02a913a7 1948 }
24ac23ab 1949 if (state->inode == dentry->d_inode) {
d75340cc 1950 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1951 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT
1952 return 1;
1953 }
dc0b027d 1954 nfs4_close_sync(&path, state, fmode);
02a913a7
TM
1955out_drop:
1956 d_drop(dentry);
1da177e4
LT
1957 return 0;
1958}
1959
7fe5c398
TM
1960void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1961{
1962 if (ctx->state == NULL)
1963 return;
1964 if (is_sync)
1965 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1966 else
1967 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1968}
1da177e4
LT
1969
1970static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1971{
43652ad5
BH
1972 struct nfs4_server_caps_arg args = {
1973 .fhandle = fhandle,
1974 };
1da177e4
LT
1975 struct nfs4_server_caps_res res = {};
1976 struct rpc_message msg = {
1977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1978 .rpc_argp = &args,
1da177e4
LT
1979 .rpc_resp = &res,
1980 };
1981 int status;
1982
cccef3b9 1983 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
1984 if (status == 0) {
1985 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1986 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1987 server->caps |= NFS_CAP_ACLS;
1988 if (res.has_links != 0)
1989 server->caps |= NFS_CAP_HARDLINKS;
1990 if (res.has_symlinks != 0)
1991 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM
1992 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1993 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1994 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT
1995 server->acl_bitmask = res.acl_bitmask;
1996 }
cccef3b9 1997
1da177e4
LT
1998 return status;
1999}
2000
55a97593 2001int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT
2002{
2003 struct nfs4_exception exception = { };
2004 int err;
2005 do {
2006 err = nfs4_handle_exception(server,
2007 _nfs4_server_capabilities(server, fhandle),
2008 &exception);
2009 } while (exception.retry);
2010 return err;
2011}
2012
2013static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2014 struct nfs_fsinfo *info)
2015{
1da177e4
LT
2016 struct nfs4_lookup_root_arg args = {
2017 .bitmask = nfs4_fattr_bitmap,
2018 };
2019 struct nfs4_lookup_res res = {
2020 .server = server,
0e574af1 2021 .fattr = info->fattr,
1da177e4
LT
2022 .fh = fhandle,
2023 };
2024 struct rpc_message msg = {
2025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2026 .rpc_argp = &args,
2027 .rpc_resp = &res,
2028 };
008f55d0
BH
2029 int status;
2030
0e574af1 2031 nfs_fattr_init(info->fattr);
008f55d0
BH
2032 status = nfs4_recover_expired_lease(server);
2033 if (!status)
2034 status = nfs4_check_client_ready(server->nfs_client);
2035 if (!status)
2036 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2037 return status;
1da177e4
LT
2038}
2039
2040static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2041 struct nfs_fsinfo *info)
2042{
2043 struct nfs4_exception exception = { };
2044 int err;
2045 do {
2046 err = nfs4_handle_exception(server,
2047 _nfs4_lookup_root(server, fhandle, info),
2048 &exception);
2049 } while (exception.retry);
2050 return err;
2051}
2052
54ceac45
DH
2053/*
2054 * get the file handle for the "/" directory on the server
2055 */
1da177e4 2056static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2057 struct nfs_fsinfo *info)
1da177e4 2058{
1da177e4
LT
2059 int status;
2060
1da177e4 2061 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT
2062 if (status == 0)
2063 status = nfs4_server_capabilities(server, fhandle);
2064 if (status == 0)
2065 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2066 return nfs4_map_errors(status);
1da177e4
LT
2067}
2068
6b97fd3d
MN
2069/*
2070 * Get locations and (maybe) other attributes of a referral.
2071 * Note that we'll actually follow the referral later when
2072 * we detect fsid mismatch in inode revalidation
2073 */
56659e99 2074static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN
2075{
2076 int status = -ENOMEM;
2077 struct page *page = NULL;
2078 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN
2079
2080 page = alloc_page(GFP_KERNEL);
2081 if (page == NULL)
2082 goto out;
2083 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2084 if (locations == NULL)
2085 goto out;
2086
c228fd3a 2087 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN
2088 if (status != 0)
2089 goto out;
2090 /* Make sure server returned a different fsid for the referral */
2091 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2092 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN
2093 status = -EIO;
2094 goto out;
2095 }
2096
2097 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2098 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2099 if (!fattr->mode)
2100 fattr->mode = S_IFDIR;
2101 memset(fhandle, 0, sizeof(struct nfs_fh));
2102out:
2103 if (page)
2104 __free_page(page);
2105 if (locations)
2106 kfree(locations);
2107 return status;
2108}
2109
1da177e4
LT
2110static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2111{
2112 struct nfs4_getattr_arg args = {
2113 .fh = fhandle,
2114 .bitmask = server->attr_bitmask,
2115 };
2116 struct nfs4_getattr_res res = {
2117 .fattr = fattr,
2118 .server = server,
2119 };
2120 struct rpc_message msg = {
2121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2122 .rpc_argp = &args,
2123 .rpc_resp = &res,
2124 };
2125
0e574af1 2126 nfs_fattr_init(fattr);
cccef3b9 2127 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
2128}
2129
2130static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2131{
2132 struct nfs4_exception exception = { };
2133 int err;
2134 do {
2135 err = nfs4_handle_exception(server,
2136 _nfs4_proc_getattr(server, fhandle, fattr),
2137 &exception);
2138 } while (exception.retry);
2139 return err;
2140}
2141
2142/*
2143 * The file is not closed if it is opened due to the a request to change
2144 * the size of the file. The open call will not be needed once the
2145 * VFS layer lookup-intents are implemented.
2146 *
2147 * Close is called when the inode is destroyed.
2148 * If we haven't opened the file for O_WRONLY, we
2149 * need to in the size_change case to obtain a stateid.
2150 *
2151 * Got race?
2152 * Because OPEN is always done by name in nfsv4, it is
2153 * possible that we opened a different file by the same
2154 * name. We can recognize this race condition, but we
2155 * can't do anything about it besides returning an error.
2156 *
2157 * This will be fixed with VFS changes (lookup-intent).
2158 */
2159static int
2160nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2161 struct iattr *sattr)
2162{
08e9eac4 2163 struct inode *inode = dentry->d_inode;
659bfcd6 2164 struct rpc_cred *cred = NULL;
d530838b 2165 struct nfs4_state *state = NULL;
1da177e4
LT
2166 int status;
2167
0e574af1 2168 nfs_fattr_init(fattr);
1da177e4 2169
d530838b 2170 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM
2171 if (sattr->ia_valid & ATTR_FILE) {
2172 struct nfs_open_context *ctx;
2173
2174 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB
2175 if (ctx) {
2176 cred = ctx->cred;
2177 state = ctx->state;
2178 }
659bfcd6 2179 }
08e9eac4 2180
659bfcd6 2181 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM
2182 if (status == 0)
2183 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT
2184 return status;
2185}
2186
56659e99
TM
2187static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2188 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH
2189 struct nfs_fattr *fattr)
2190{
2191 int status;
2192 struct nfs4_lookup_arg args = {
2193 .bitmask = server->attr_bitmask,
2194 .dir_fh = dirfh,
2195 .name = name,
2196 };
2197 struct nfs4_lookup_res res = {
2198 .server = server,
2199 .fattr = fattr,
2200 .fh = fhandle,
2201 };
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2204 .rpc_argp = &args,
2205 .rpc_resp = &res,
2206 };
2207
2208 nfs_fattr_init(fattr);
2209
2210 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2211 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2212 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH
2213 return status;
2214}
2215
2216static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2217 struct qstr *name, struct nfs_fh *fhandle,
2218 struct nfs_fattr *fattr)
2219{
2220 struct nfs4_exception exception = { };
2221 int err;
2222 do {
4e56e082
TM
2223 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2224 /* FIXME: !!!! */
2225 if (err == -NFS4ERR_MOVED) {
2226 err = -EREMOTE;
2227 break;
2228 }
2229 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH
2230 } while (exception.retry);
2231 return err;
2232}
2233
56659e99 2234static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT
2235 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2236{
4e56e082 2237 int status;
1da177e4
LT
2238
2239 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2240 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN
2241 if (status == -NFS4ERR_MOVED)
2242 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT
2243 dprintk("NFS reply lookup: %d\n", status);
2244 return status;
2245}
2246
2247static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2248{
2249 struct nfs4_exception exception = { };
2250 int err;
2251 do {
2252 err = nfs4_handle_exception(NFS_SERVER(dir),
2253 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2254 &exception);
2255 } while (exception.retry);
2256 return err;
2257}
2258
2259static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2260{
76b32999
TM
2261 struct nfs_server *server = NFS_SERVER(inode);
2262 struct nfs_fattr fattr;
1da177e4
LT
2263 struct nfs4_accessargs args = {
2264 .fh = NFS_FH(inode),
76b32999
TM
2265 .bitmask = server->attr_bitmask,
2266 };
2267 struct nfs4_accessres res = {
2268 .server = server,
2269 .fattr = &fattr,
1da177e4 2270 };
1da177e4
LT
2271 struct rpc_message msg = {
2272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2273 .rpc_argp = &args,
2274 .rpc_resp = &res,
2275 .rpc_cred = entry->cred,
2276 };
2277 int mode = entry->mask;
2278 int status;
2279
2280 /*
2281 * Determine which access bits we want to ask for...
2282 */
2283 if (mode & MAY_READ)
2284 args.access |= NFS4_ACCESS_READ;
2285 if (S_ISDIR(inode->i_mode)) {
2286 if (mode & MAY_WRITE)
2287 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2288 if (mode & MAY_EXEC)
2289 args.access |= NFS4_ACCESS_LOOKUP;
2290 } else {
2291 if (mode & MAY_WRITE)
2292 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2293 if (mode & MAY_EXEC)
2294 args.access |= NFS4_ACCESS_EXECUTE;
2295 }
76b32999 2296 nfs_fattr_init(&fattr);
cccef3b9 2297 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
2298 if (!status) {
2299 entry->mask = 0;
2300 if (res.access & NFS4_ACCESS_READ)
2301 entry->mask |= MAY_READ;
2302 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2303 entry->mask |= MAY_WRITE;
2304 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2305 entry->mask |= MAY_EXEC;
76b32999 2306 nfs_refresh_inode(inode, &fattr);
1da177e4
LT
2307 }
2308 return status;
2309}
2310
2311static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2312{
2313 struct nfs4_exception exception = { };
2314 int err;
2315 do {
2316 err = nfs4_handle_exception(NFS_SERVER(inode),
2317 _nfs4_proc_access(inode, entry),
2318 &exception);
2319 } while (exception.retry);
2320 return err;
2321}
2322
2323/*
2324 * TODO: For the time being, we don't try to get any attributes
2325 * along with any of the zero-copy operations READ, READDIR,
2326 * READLINK, WRITE.
2327 *
2328 * In the case of the first three, we want to put the GETATTR
2329 * after the read-type operation -- this is because it is hard
2330 * to predict the length of a GETATTR response in v4, and thus
2331 * align the READ data correctly. This means that the GETATTR
2332 * may end up partially falling into the page cache, and we should
2333 * shift it into the 'tail' of the xdr_buf before processing.
2334 * To do this efficiently, we need to know the total length
2335 * of data received, which doesn't seem to be available outside
2336 * of the RPC layer.
2337 *
2338 * In the case of WRITE, we also want to put the GETATTR after
2339 * the operation -- in this case because we want to make sure
2340 * we get the post-operation mtime and size. This means that
2341 * we can't use xdr_encode_pages() as written: we need a variant
2342 * of it which would leave room in the 'tail' iovec.
2343 *
2344 * Both of these changes to the XDR layer would in fact be quite
2345 * minor, but I decided to leave them for a subsequent patch.
2346 */
2347static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2348 unsigned int pgbase, unsigned int pglen)
2349{
2350 struct nfs4_readlink args = {
2351 .fh = NFS_FH(inode),
2352 .pgbase = pgbase,
2353 .pglen = pglen,
2354 .pages = &page,
2355 };
f50c7000 2356 struct nfs4_readlink_res res;
1da177e4
LT
2357 struct rpc_message msg = {
2358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2359 .rpc_argp = &args,
f50c7000 2360 .rpc_resp = &res,
1da177e4
LT
2361 };
2362
cccef3b9 2363 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT
2364}
2365
2366static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2367 unsigned int pgbase, unsigned int pglen)
2368{
2369 struct nfs4_exception exception = { };
2370 int err;
2371 do {
2372 err = nfs4_handle_exception(NFS_SERVER(inode),
2373 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2374 &exception);
2375 } while (exception.retry);
2376 return err;
2377}
2378
1da177e4
LT
2379/*
2380 * Got race?
2381 * We will need to arrange for the VFS layer to provide an atomic open.
2382 * Until then, this create/open method is prone to inefficiency and race
2383 * conditions due to the lookup, create, and open VFS calls from sys_open()
2384 * placed on the wire.
2385 *
2386 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2387 * The file will be opened again in the subsequent VFS open call
2388 * (nfs4_proc_file_open).
2389 *
2390 * The open for read will just hang around to be used by any process that
2391 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2392 */
2393
2394static int
2395nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2396 int flags, struct nameidata *nd)
1da177e4 2397{
ad389da7 2398 struct path path = {
4ac91378 2399 .mnt = nd->path.mnt,
ad389da7
TM
2400 .dentry = dentry,
2401 };
1da177e4
LT
2402 struct nfs4_state *state;
2403 struct rpc_cred *cred;
dc0b027d 2404 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT
2405 int status = 0;
2406
98a8e323 2407 cred = rpc_lookup_cred();
1da177e4
LT
2408 if (IS_ERR(cred)) {
2409 status = PTR_ERR(cred);
2410 goto out;
2411 }
dc0b027d 2412 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2413 d_drop(dentry);
1da177e4
LT
2414 if (IS_ERR(state)) {
2415 status = PTR_ERR(state);
659bfcd6 2416 goto out_putcred;
1da177e4 2417 }
d4d9cdcb 2418 d_add(dentry, igrab(state->inode));
d75340cc 2419 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT
2420 if (flags & O_EXCL) {
2421 struct nfs_fattr fattr;
659bfcd6 2422 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2423 if (status == 0)
65e4308d 2424 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2425 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2426 }
ad389da7 2427 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2428 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2429 else
dc0b027d 2430 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM
2431out_putcred:
2432 put_rpccred(cred);
1da177e4
LT
2433out:
2434 return status;
2435}
2436
2437static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2438{
16e42959 2439 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2440 struct nfs_removeargs args = {
1da177e4 2441 .fh = NFS_FH(dir),
4fdc17b2
TM
2442 .name.len = name->len,
2443 .name.name = name->name,
16e42959
TM
2444 .bitmask = server->attr_bitmask,
2445 };
4fdc17b2 2446 struct nfs_removeres res = {
16e42959 2447 .server = server,
1da177e4 2448 };
1da177e4 2449 struct rpc_message msg = {
4fdc17b2
TM
2450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2451 .rpc_argp = &args,
2452 .rpc_resp = &res,
1da177e4
LT
2453 };
2454 int status;
2455
4fdc17b2 2456 nfs_fattr_init(&res.dir_attr);
cccef3b9 2457 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM
2458 if (status == 0) {
2459 update_changeattr(dir, &res.cinfo);
4fdc17b2 2460 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2461 }
1da177e4
LT
2462 return status;
2463}
2464
2465static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2466{
2467 struct nfs4_exception exception = { };
2468 int err;
2469 do {
2470 err = nfs4_handle_exception(NFS_SERVER(dir),
2471 _nfs4_proc_remove(dir, name),
2472 &exception);
2473 } while (exception.retry);
2474 return err;
2475}
2476
e4eff1a6 2477static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2478{
e4eff1a6
TM
2479 struct nfs_server *server = NFS_SERVER(dir);
2480 struct nfs_removeargs *args = msg->rpc_argp;
2481 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2482
a65318bf 2483 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2484 res->server = server;
1da177e4 2485 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT
2486}
2487
e4eff1a6 2488static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2489{
e4eff1a6
TM
2490 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2491
472cfbd9 2492 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2493 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2494 return 0;
472cfbd9 2495 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM
2496 update_changeattr(dir, &res->cinfo);
2497 nfs_post_op_update_inode(dir, &res->dir_attr);
2498 return 1;
1da177e4
LT
2499}
2500
2501static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2502 struct inode *new_dir, struct qstr *new_name)
2503{
6caf2c82 2504 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT
2505 struct nfs4_rename_arg arg = {
2506 .old_dir = NFS_FH(old_dir),
2507 .new_dir = NFS_FH(new_dir),
2508 .old_name = old_name,
2509 .new_name = new_name,
6caf2c82
TM
2510 .bitmask = server->attr_bitmask,
2511 };
2512 struct nfs_fattr old_fattr, new_fattr;
2513 struct nfs4_rename_res res = {
2514 .server = server,
2515 .old_fattr = &old_fattr,
2516 .new_fattr = &new_fattr,
1da177e4 2517 };
1da177e4
LT
2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2520 .rpc_argp = &arg,
2521 .rpc_resp = &res,
2522 };
2523 int status;
2524
6caf2c82
TM
2525 nfs_fattr_init(res.old_fattr);
2526 nfs_fattr_init(res.new_fattr);
cccef3b9 2527 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT
2528
2529 if (!status) {
2530 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2531 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2532 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2533 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT
2534 }
2535 return status;
2536}
2537
2538static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2539 struct inode *new_dir, struct qstr *new_name)
2540{
2541 struct nfs4_exception exception = { };
2542 int err;
2543 do {
2544 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2545 _nfs4_proc_rename(old_dir, old_name,
2546 new_dir, new_name),
2547 &exception);
2548 } while (exception.retry);
2549 return err;
2550}
2551
2552static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2553{
91ba2eee 2554 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
2555 struct nfs4_link_arg arg = {
2556 .fh = NFS_FH(inode),
2557 .dir_fh = NFS_FH(dir),
2558 .name = name,
91ba2eee
TM
2559 .bitmask = server->attr_bitmask,
2560 };
2561 struct nfs_fattr fattr, dir_attr;
2562 struct nfs4_link_res res = {
2563 .server = server,
2564 .fattr = &fattr,
2565 .dir_attr = &dir_attr,
1da177e4 2566 };
1da177e4
LT
2567 struct rpc_message msg = {
2568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2569 .rpc_argp = &arg,
91ba2eee 2570 .rpc_resp = &res,
1da177e4
LT
2571 };
2572 int status;
2573
91ba2eee
TM
2574 nfs_fattr_init(res.fattr);
2575 nfs_fattr_init(res.dir_attr);
cccef3b9 2576 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM
2577 if (!status) {
2578 update_changeattr(dir, &res.cinfo);
2579 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2580 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2581 }
1da177e4
LT
2582
2583 return status;
2584}
2585
2586static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2587{
2588 struct nfs4_exception exception = { };
2589 int err;
2590 do {
2591 err = nfs4_handle_exception(NFS_SERVER(inode),
2592 _nfs4_proc_link(inode, dir, name),
2593 &exception);
2594 } while (exception.retry);
2595 return err;
2596}
2597
57dc9a57
TM
2598struct nfs4_createdata {
2599 struct rpc_message msg;
2600 struct nfs4_create_arg arg;
2601 struct nfs4_create_res res;
2602 struct nfs_fh fh;
2603 struct nfs_fattr fattr;
2604 struct nfs_fattr dir_fattr;
2605};
2606
2607static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2608 struct qstr *name, struct iattr *sattr, u32 ftype)
2609{
2610 struct nfs4_createdata *data;
2611
2612 data = kzalloc(sizeof(*data), GFP_KERNEL);
2613 if (data != NULL) {
2614 struct nfs_server *server = NFS_SERVER(dir);
2615
2616 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2617 data->msg.rpc_argp = &data->arg;
2618 data->msg.rpc_resp = &data->res;
2619 data->arg.dir_fh = NFS_FH(dir);
2620 data->arg.server = server;
2621 data->arg.name = name;
2622 data->arg.attrs = sattr;
2623 data->arg.ftype = ftype;
2624 data->arg.bitmask = server->attr_bitmask;
2625 data->res.server = server;
2626 data->res.fh = &data->fh;
2627 data->res.fattr = &data->fattr;
2628 data->res.dir_fattr = &data->dir_fattr;
2629 nfs_fattr_init(data->res.fattr);
2630 nfs_fattr_init(data->res.dir_fattr);
2631 }
2632 return data;
2633}
2634
2635static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2636{
cccef3b9
AA
2637 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2638 &data->arg, &data->res, 1);
57dc9a57
TM
2639 if (status == 0) {
2640 update_changeattr(dir, &data->res.dir_cinfo);
2641 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2642 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2643 }
2644 return status;
2645}
2646
2647static void nfs4_free_createdata(struct nfs4_createdata *data)
2648{
2649 kfree(data);
2650}
2651
4f390c15 2652static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2653 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2654{
57dc9a57
TM
2655 struct nfs4_createdata *data;
2656 int status = -ENAMETOOLONG;
1da177e4 2657
94a6d753 2658 if (len > NFS4_MAXPATHLEN)
57dc9a57 2659 goto out;
4f390c15 2660
57dc9a57
TM
2661 status = -ENOMEM;
2662 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2663 if (data == NULL)
2664 goto out;
2665
2666 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2667 data->arg.u.symlink.pages = &page;
2668 data->arg.u.symlink.len = len;
1da177e4 2669
57dc9a57
TM
2670 status = nfs4_do_create(dir, dentry, data);
2671
2672 nfs4_free_createdata(data);
2673out:
1da177e4
LT
2674 return status;
2675}
2676
4f390c15 2677static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2678 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT
2679{
2680 struct nfs4_exception exception = { };
2681 int err;
2682 do {
2683 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL
2684 _nfs4_proc_symlink(dir, dentry, page,
2685 len, sattr),
1da177e4
LT
2686 &exception);
2687 } while (exception.retry);
2688 return err;
2689}
2690
2691static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2692 struct iattr *sattr)
2693{
57dc9a57
TM
2694 struct nfs4_createdata *data;
2695 int status = -ENOMEM;
1da177e4 2696
57dc9a57
TM
2697 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2698 if (data == NULL)
2699 goto out;
2700
2701 status = nfs4_do_create(dir, dentry, data);
2702
2703 nfs4_free_createdata(data);
2704out:
1da177e4
LT
2705 return status;
2706}
2707
2708static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2709 struct iattr *sattr)
2710{
2711 struct nfs4_exception exception = { };
2712 int err;
2713 do {
2714 err = nfs4_handle_exception(NFS_SERVER(dir),
2715 _nfs4_proc_mkdir(dir, dentry, sattr),
2716 &exception);
2717 } while (exception.retry);
2718 return err;
2719}
2720
2721static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2722 u64 cookie, struct page *page, unsigned int count, int plus)
2723{
2724 struct inode *dir = dentry->d_inode;
2725 struct nfs4_readdir_arg args = {
2726 .fh = NFS_FH(dir),
2727 .pages = &page,
2728 .pgbase = 0,
2729 .count = count,
a65318bf 2730 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT
2731 };
2732 struct nfs4_readdir_res res;
2733 struct rpc_message msg = {
2734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2735 .rpc_argp = &args,
2736 .rpc_resp = &res,
2737 .rpc_cred = cred,
2738 };
2739 int status;
2740
3110ff80 2741 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM
2742 dentry->d_parent->d_name.name,
2743 dentry->d_name.name,
2744 (unsigned long long)cookie);
1da177e4
LT
2745 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2746 res.pgbase = args.pgbase;
cccef3b9 2747 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT
2748 if (status == 0)
2749 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM
2750
2751 nfs_invalidate_atime(dir);
2752
3110ff80 2753 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT
2754 return status;
2755}
2756
2757static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2758 u64 cookie, struct page *page, unsigned int count, int plus)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2764 _nfs4_proc_readdir(dentry, cred, cookie,
2765 page, count, plus),
2766 &exception);
2767 } while (exception.retry);
2768 return err;
2769}
2770
2771static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2772 struct iattr *sattr, dev_t rdev)
2773{
57dc9a57
TM
2774 struct nfs4_createdata *data;
2775 int mode = sattr->ia_mode;
2776 int status = -ENOMEM;
1da177e4
LT
2777
2778 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2779 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM
2780
2781 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2782 if (data == NULL)
2783 goto out;
2784
1da177e4 2785 if (S_ISFIFO(mode))
57dc9a57 2786 data->arg.ftype = NF4FIFO;
1da177e4 2787 else if (S_ISBLK(mode)) {
57dc9a57
TM
2788 data->arg.ftype = NF4BLK;
2789 data->arg.u.device.specdata1 = MAJOR(rdev);
2790 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT
2791 }
2792 else if (S_ISCHR(mode)) {
57dc9a57
TM
2793 data->arg.ftype = NF4CHR;
2794 data->arg.u.device.specdata1 = MAJOR(rdev);
2795 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2796 }
1da177e4 2797
57dc9a57
TM
2798 status = nfs4_do_create(dir, dentry, data);
2799
2800 nfs4_free_createdata(data);
2801out:
1da177e4
LT
2802 return status;
2803}
2804
2805static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2806 struct iattr *sattr, dev_t rdev)
2807{
2808 struct nfs4_exception exception = { };
2809 int err;
2810 do {
2811 err = nfs4_handle_exception(NFS_SERVER(dir),
2812 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2813 &exception);
2814 } while (exception.retry);
2815 return err;
2816}
2817
2818static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2819 struct nfs_fsstat *fsstat)
2820{
2821 struct nfs4_statfs_arg args = {
2822 .fh = fhandle,
2823 .bitmask = server->attr_bitmask,
2824 };
24ad148a
BH
2825 struct nfs4_statfs_res res = {
2826 .fsstat = fsstat,
2827 };
1da177e4
LT
2828 struct rpc_message msg = {
2829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2830 .rpc_argp = &args,
24ad148a 2831 .rpc_resp = &res,
1da177e4
LT
2832 };
2833
0e574af1 2834 nfs_fattr_init(fsstat->fattr);
cccef3b9 2835 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
2836}
2837
2838static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2839{
2840 struct nfs4_exception exception = { };
2841 int err;
2842 do {
2843 err = nfs4_handle_exception(server,
2844 _nfs4_proc_statfs(server, fhandle, fsstat),
2845 &exception);
2846 } while (exception.retry);
2847 return err;
2848}
2849
2850static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2851 struct nfs_fsinfo *fsinfo)
2852{
2853 struct nfs4_fsinfo_arg args = {
2854 .fh = fhandle,
2855 .bitmask = server->attr_bitmask,
2856 };
3dda5e43
BH
2857 struct nfs4_fsinfo_res res = {
2858 .fsinfo = fsinfo,
2859 };
1da177e4
LT
2860 struct rpc_message msg = {
2861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2862 .rpc_argp = &args,
3dda5e43 2863 .rpc_resp = &res,
1da177e4
LT
2864 };
2865
cccef3b9 2866 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
2867}
2868
2869static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2870{
2871 struct nfs4_exception exception = { };
2872 int err;
2873
2874 do {
2875 err = nfs4_handle_exception(server,
2876 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2877 &exception);
2878 } while (exception.retry);
2879 return err;
2880}
2881
2882static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2883{
0e574af1 2884 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT
2885 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2886}
2887
2888static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2889 struct nfs_pathconf *pathconf)
2890{
2891 struct nfs4_pathconf_arg args = {
2892 .fh = fhandle,
2893 .bitmask = server->attr_bitmask,
2894 };
d45b2989
BH
2895 struct nfs4_pathconf_res res = {
2896 .pathconf = pathconf,
2897 };
1da177e4
LT
2898 struct rpc_message msg = {
2899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2900 .rpc_argp = &args,
d45b2989 2901 .rpc_resp = &res,
1da177e4
LT
2902 };
2903
2904 /* None of the pathconf attributes are mandatory to implement */
2905 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2906 memset(pathconf, 0, sizeof(*pathconf));
2907 return 0;
2908 }
2909
0e574af1 2910 nfs_fattr_init(pathconf->fattr);
cccef3b9 2911 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT
2912}
2913
2914static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2915 struct nfs_pathconf *pathconf)
2916{
2917 struct nfs4_exception exception = { };
2918 int err;
2919
2920 do {
2921 err = nfs4_handle_exception(server,
2922 _nfs4_proc_pathconf(server, fhandle, pathconf),
2923 &exception);
2924 } while (exception.retry);
2925 return err;
2926}
2927
ec06c096 2928static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2929{
ec06c096 2930 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2931
f11c88af
AA
2932 dprintk("--> %s\n", __func__);
2933
2934 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2935 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2936
9e33bed5 2937 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2938 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2939 return -EAGAIN;
1da177e4 2940 }
8850df99
TM
2941
2942 nfs_invalidate_atime(data->inode);
1da177e4 2943 if (task->tk_status > 0)
ec06c096
TM
2944 renew_lease(server, data->timestamp);
2945 return 0;
1da177e4
LT
2946}
2947
bdc7f021 2948static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2949{
1da177e4 2950 data->timestamp = jiffies;
bdc7f021 2951 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT
2952}
2953
788e7a89 2954static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2955{
1da177e4
LT
2956 struct inode *inode = data->inode;
2957
def6ed7e
AA
2958 /* slot is freed in nfs_writeback_done */
2959 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2960 task->tk_status);
2961
9e33bed5 2962 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2963 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2964 return -EAGAIN;
1da177e4 2965 }
4f9838c7 2966 if (task->tk_status >= 0) {
1da177e4 2967 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2968 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2969 }
788e7a89 2970 return 0;
1da177e4
LT
2971}
2972
bdc7f021 2973static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2974{
bdc7f021
TM
2975 struct nfs_server *server = NFS_SERVER(data->inode);
2976
a65318bf 2977 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2978 data->res.server = server;
1da177e4
LT
2979 data->timestamp = jiffies;
2980
bdc7f021 2981 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT
2982}
2983
788e7a89 2984static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2985{
1da177e4
LT
2986 struct inode *inode = data->inode;
2987
21d9a851
AA
2988 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2989 task->tk_status);
9e33bed5 2990 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 2991 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2992 return -EAGAIN;
1da177e4 2993 }
21d9a851
AA
2994 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2995 &data->res.seq_res);
9e08a3c5 2996 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2997 return 0;
1da177e4
LT
2998}
2999
bdc7f021 3000static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3001{
788e7a89 3002 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3003
a65318bf 3004 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3005 data->res.server = server;
bdc7f021 3006 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT
3007}
3008
3009/*
3010 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3011 * standalone procedure for queueing an asynchronous RENEW.
3012 */
963d8fe5 3013static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3014{
adfa6f98 3015 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3016 unsigned long timestamp = (unsigned long)data;
1da177e4
LT
3017
3018 if (task->tk_status < 0) {
95baa25c
TM
3019 /* Unless we're shutting down, schedule state recovery! */
3020 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3021 nfs4_schedule_state_recovery(clp);
1da177e4
LT
3022 return;
3023 }
3024 spin_lock(&clp->cl_lock);
3025 if (time_before(clp->cl_last_renewal,timestamp))
3026 clp->cl_last_renewal = timestamp;
3027 spin_unlock(&clp->cl_lock);
29fba38b
BH
3028 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3029 task->tk_msg.rpc_cred);
3030 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT
3031}
3032
963d8fe5
TM
3033static const struct rpc_call_ops nfs4_renew_ops = {
3034 .rpc_call_done = nfs4_renew_done,
3035};
3036
adfa6f98 3037int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
3038{
3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3041 .rpc_argp = clp,
b4454fe1 3042 .rpc_cred = cred,
1da177e4
LT
3043 };
3044
3045 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3046 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT
3047}
3048
adfa6f98 3049int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
3050{
3051 struct rpc_message msg = {
3052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3053 .rpc_argp = clp,
b4454fe1 3054 .rpc_cred = cred,
1da177e4
LT
3055 };
3056 unsigned long now = jiffies;
3057 int status;
3058
3059 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3060 if (status < 0)
3061 return status;
3062 spin_lock(&clp->cl_lock);
3063 if (time_before(clp->cl_last_renewal,now))
3064 clp->cl_last_renewal = now;
3065 spin_unlock(&clp->cl_lock);
3066 return 0;
3067}
3068
aa1870af
BF
3069static inline int nfs4_server_supports_acls(struct nfs_server *server)
3070{
3071 return (server->caps & NFS_CAP_ACLS)
3072 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3073 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3074}
3075
3076/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3077 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3078 * the stack.
3079 */
3080#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3081
3082static void buf_to_pages(const void *buf, size_t buflen,
3083 struct page **pages, unsigned int *pgbase)
3084{
3085 const void *p = buf;
3086
3087 *pgbase = offset_in_page(buf);
3088 p -= *pgbase;
3089 while (p < buf + buflen) {
3090 *(pages++) = virt_to_page(p);
3091 p += PAGE_CACHE_SIZE;
3092 }
3093}
3094
e50a1c2e
BF
3095struct nfs4_cached_acl {
3096 int cached;
3097 size_t len;
3e9d4154 3098 char data[0];
e50a1c2e
BF
3099};
3100
3101static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3102{
3103 struct nfs_inode *nfsi = NFS_I(inode);
3104
3105 spin_lock(&inode->i_lock);
3106 kfree(nfsi->nfs4_acl);
3107 nfsi->nfs4_acl = acl;
3108 spin_unlock(&inode->i_lock);
3109}
3110
3111static void nfs4_zap_acl_attr(struct inode *inode)
3112{
3113 nfs4_set_cached_acl(inode, NULL);
3114}
3115
3116static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3117{
3118 struct nfs_inode *nfsi = NFS_I(inode);
3119 struct nfs4_cached_acl *acl;
3120 int ret = -ENOENT;
3121
3122 spin_lock(&inode->i_lock);
3123 acl = nfsi->nfs4_acl;
3124 if (acl == NULL)
3125 goto out;
3126 if (buf == NULL) /* user is just asking for length */
3127 goto out_len;
3128 if (acl->cached == 0)
3129 goto out;
3130 ret = -ERANGE; /* see getxattr(2) man page */
3131 if (acl->len > buflen)
3132 goto out;
3133 memcpy(buf, acl->data, acl->len);
3134out_len:
3135 ret = acl->len;
3136out:
3137 spin_unlock(&inode->i_lock);
3138 return ret;
3139}
3140
3141static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3142{
3143 struct nfs4_cached_acl *acl;
3144
3145 if (buf && acl_len <= PAGE_SIZE) {
3146 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3147 if (acl == NULL)
3148 goto out;
3149 acl->cached = 1;
3150 memcpy(acl->data, buf, acl_len);
3151 } else {
3152 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3153 if (acl == NULL)
3154 goto out;
3155 acl->cached = 0;
3156 }
3157 acl->len = acl_len;
3158out:
3159 nfs4_set_cached_acl(inode, acl);
3160}
3161
16b4289c 3162static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3163{
aa1870af
BF
3164 struct page *pages[NFS4ACL_MAXPAGES];
3165 struct nfs_getaclargs args = {
3166 .fh = NFS_FH(inode),
3167 .acl_pages = pages,
3168 .acl_len = buflen,
3169 };
663c79b3
BH
3170 struct nfs_getaclres res = {
3171 .acl_len = buflen,
3172 };
e50a1c2e 3173 void *resp_buf;
aa1870af
BF
3174 struct rpc_message msg = {
3175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3176 .rpc_argp = &args,
663c79b3 3177 .rpc_resp = &res,
aa1870af 3178 };
e50a1c2e 3179 struct page *localpage = NULL;
aa1870af
BF
3180 int ret;
3181
e50a1c2e
BF
3182 if (buflen < PAGE_SIZE) {
3183 /* As long as we're doing a round trip to the server anyway,
3184 * let's be prepared for a page of acl data. */
3185 localpage = alloc_page(GFP_KERNEL);
3186 resp_buf = page_address(localpage);
3187 if (localpage == NULL)
3188 return -ENOMEM;
3189 args.acl_pages[0] = localpage;
3190 args.acl_pgbase = 0;
663c79b3 3191 args.acl_len = PAGE_SIZE;
e50a1c2e
BF
3192 } else {
3193 resp_buf = buf;
3194 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3195 }
cccef3b9 3196 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF
3197 if (ret)
3198 goto out_free;
663c79b3
BH
3199 if (res.acl_len > args.acl_len)
3200 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3201 else
663c79b3 3202 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF
3203 if (buf) {
3204 ret = -ERANGE;
663c79b3 3205 if (res.acl_len > buflen)
e50a1c2e
BF
3206 goto out_free;
3207 if (localpage)
663c79b3 3208 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3209 }
663c79b3 3210 ret = res.acl_len;
e50a1c2e
BF
3211out_free:
3212 if (localpage)
3213 __free_page(localpage);
aa1870af
BF
3214 return ret;
3215}
3216
16b4289c
TM
3217static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3218{
3219 struct nfs4_exception exception = { };
3220 ssize_t ret;
3221 do {
3222 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3223 if (ret >= 0)
3224 break;
3225 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3226 } while (exception.retry);
3227 return ret;
3228}
3229
e50a1c2e
BF
3230static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3231{
3232 struct nfs_server *server = NFS_SERVER(inode);
3233 int ret;
3234
3235 if (!nfs4_server_supports_acls(server))
3236 return -EOPNOTSUPP;
3237 ret = nfs_revalidate_inode(server, inode);
3238 if (ret < 0)
3239 return ret;
f41f7418
TM
3240 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3241 nfs_zap_acl_cache(inode);
e50a1c2e
BF
3242 ret = nfs4_read_cached_acl(inode, buf, buflen);
3243 if (ret != -ENOENT)
3244 return ret;
3245 return nfs4_get_acl_uncached(inode, buf, buflen);
3246}
3247
16b4289c 3248static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF
3249{
3250 struct nfs_server *server = NFS_SERVER(inode);
3251 struct page *pages[NFS4ACL_MAXPAGES];
3252 struct nfs_setaclargs arg = {
3253 .fh = NFS_FH(inode),
3254 .acl_pages = pages,
3255 .acl_len = buflen,
3256 };
73c403a9 3257 struct nfs_setaclres res;
4b580ee3
BF
3258 struct rpc_message msg = {
3259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3260 .rpc_argp = &arg,
73c403a9 3261 .rpc_resp = &res,
4b580ee3
BF
3262 };
3263 int ret;
3264
3265 if (!nfs4_server_supports_acls(server))
3266 return -EOPNOTSUPP;
642ac549 3267 nfs_inode_return_delegation(inode);
4b580ee3 3268 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3269 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM
3270 nfs_access_zap_cache(inode);
3271 nfs_zap_acl_cache(inode);
4b580ee3
BF
3272 return ret;
3273}
3274
16b4289c
TM
3275static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3276{
3277 struct nfs4_exception exception = { };
3278 int err;
3279 do {
3280 err = nfs4_handle_exception(NFS_SERVER(inode),
3281 __nfs4_proc_set_acl(inode, buf, buflen),
3282 &exception);
3283 } while (exception.retry);
3284 return err;
3285}
3286
1da177e4 3287static int
8328d59f 3288_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3289{
1da177e4
LT
3290 if (!clp || task->tk_status >= 0)
3291 return 0;
3292 switch(task->tk_status) {
9e33bed5
TM
3293 case -NFS4ERR_ADMIN_REVOKED:
3294 case -NFS4ERR_BAD_STATEID:
3295 case -NFS4ERR_OPENMODE:
3296 if (state == NULL)
3297 break;
3298 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT
3299 case -NFS4ERR_STALE_CLIENTID:
3300 case -NFS4ERR_STALE_STATEID:
3301 case -NFS4ERR_EXPIRED:
5d00837b 3302 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3303 nfs4_schedule_state_recovery(clp);
e005e804 3304 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3305 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT
3306 task->tk_status = 0;
3307 return -EAGAIN;
4745e315
AA
3308#if defined(CONFIG_NFS_V4_1)
3309 case -NFS4ERR_BADSESSION:
3310 case -NFS4ERR_BADSLOT:
3311 case -NFS4ERR_BAD_HIGH_SLOT:
3312 case -NFS4ERR_DEADSESSION:
3313 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3314 case -NFS4ERR_SEQ_FALSE_RETRY:
3315 case -NFS4ERR_SEQ_MISORDERED:
3316 dprintk("%s ERROR %d, Reset session\n", __func__,
3317 task->tk_status);
3318 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3319 task->tk_status = 0;
3320 return -EAGAIN;
3321#endif /* CONFIG_NFS_V4_1 */
1da177e4 3322 case -NFS4ERR_DELAY:
8328d59f
AA
3323 if (server)
3324 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3325 case -NFS4ERR_GRACE:
1da177e4
LT
3326 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3327 task->tk_status = 0;
3328 return -EAGAIN;
3329 case -NFS4ERR_OLD_STATEID:
3330 task->tk_status = 0;
3331 return -EAGAIN;
3332 }
3333 task->tk_status = nfs4_map_errors(task->tk_status);
3334 return 0;
3335}
3336
8328d59f
AA
3337static int
3338nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3339{
3340 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3341}
3342
adfa6f98 3343int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT
3344{
3345 nfs4_verifier sc_verifier;
3346 struct nfs4_setclientid setclientid = {
3347 .sc_verifier = &sc_verifier,
3348 .sc_prog = program,
3349 };
3350 struct rpc_message msg = {
3351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3352 .rpc_argp = &setclientid,
3353 .rpc_resp = clp,
286d7d6a 3354 .rpc_cred = cred,
1da177e4 3355 };
bc4785cd 3356 __be32 *p;
1da177e4
LT
3357 int loop = 0;
3358 int status;
3359
bc4785cd 3360 p = (__be32*)sc_verifier.data;
1da177e4
LT
3361 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3362 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3363
3364 for(;;) {
3365 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3366 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL
3367 clp->cl_ipaddr,
3368 rpc_peeraddr2str(clp->cl_rpcclient,
3369 RPC_DISPLAY_ADDR),
69dd716c
TM
3370 rpc_peeraddr2str(clp->cl_rpcclient,
3371 RPC_DISPLAY_PROTO),
78ea323b 3372 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT
3373 clp->cl_id_uniquifier);
3374 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL
3375 sizeof(setclientid.sc_netid),
3376 rpc_peeraddr2str(clp->cl_rpcclient,
3377 RPC_DISPLAY_NETID));
1da177e4 3378 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3379 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT
3380 clp->cl_ipaddr, port >> 8, port & 255);
3381
3382 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3383 if (status != -NFS4ERR_CLID_INUSE)
3384 break;
3385 if (signalled())
3386 break;
3387 if (loop++ & 1)
3388 ssleep(clp->cl_lease_time + 1);
3389 else
3390 if (++clp->cl_id_uniquifier == 0)
3391 break;
3392 }
3393 return status;
3394}
3395
adfa6f98 3396static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
3397{
3398 struct nfs_fsinfo fsinfo;
3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3401 .rpc_argp = clp,
3402 .rpc_resp = &fsinfo,
286d7d6a 3403 .rpc_cred = cred,
1da177e4
LT
3404 };
3405 unsigned long now;
3406 int status;
3407
3408 now = jiffies;
3409 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3410 if (status == 0) {
3411 spin_lock(&clp->cl_lock);
3412 clp->cl_lease_time = fsinfo.lease_time * HZ;
3413 clp->cl_last_renewal = now;
3414 spin_unlock(&clp->cl_lock);
3415 }
3416 return status;
3417}
3418
adfa6f98 3419int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3420{
77e03677 3421 long timeout = 0;
51581f3b
TM
3422 int err;
3423 do {
3424 err = _nfs4_proc_setclientid_confirm(clp, cred);
3425 switch (err) {
3426 case 0:
3427 return err;
3428 case -NFS4ERR_RESOURCE:
3429 /* The IBM lawyers misread another document! */
3430 case -NFS4ERR_DELAY:
3431 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3432 }
3433 } while (err == 0);
3434 return err;
3435}
3436
fe650407
TM
3437struct nfs4_delegreturndata {
3438 struct nfs4_delegreturnargs args;
fa178f29 3439 struct nfs4_delegreturnres res;
fe650407
TM
3440 struct nfs_fh fh;
3441 nfs4_stateid stateid;
26e976a8 3442 unsigned long timestamp;
fa178f29 3443 struct nfs_fattr fattr;
fe650407
TM
3444 int rpc_status;
3445};
3446
fe650407
TM
3447static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3448{
3449 struct nfs4_delegreturndata *data = calldata;
938e1010
AA
3450
3451 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3452 task->tk_status);
3453
fe650407 3454 data->rpc_status = task->tk_status;
26e976a8 3455 if (data->rpc_status == 0)
fa178f29 3456 renew_lease(data->res.server, data->timestamp);
fe650407
TM
3457}
3458
3459static void nfs4_delegreturn_release(void *calldata)
3460{
fe650407
TM
3461 kfree(calldata);
3462}
3463
938e1010
AA
3464#if defined(CONFIG_NFS_V4_1)
3465static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3466{
3467 struct nfs4_delegreturndata *d_data;
3468
3469 d_data = (struct nfs4_delegreturndata *)data;
3470
3471 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3472 &d_data->args.seq_args,
3473 &d_data->res.seq_res, 1, task))
3474 return;
3475 rpc_call_start(task);
3476}
3477#endif /* CONFIG_NFS_V4_1 */
3478
c8d149f3 3479static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA
3480#if defined(CONFIG_NFS_V4_1)
3481 .rpc_call_prepare = nfs4_delegreturn_prepare,
3482#endif /* CONFIG_NFS_V4_1 */
fe650407
TM
3483 .rpc_call_done = nfs4_delegreturn_done,
3484 .rpc_release = nfs4_delegreturn_release,
3485};
3486
e6f81075 3487static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM
3488{
3489 struct nfs4_delegreturndata *data;
fa178f29 3490 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3491 struct rpc_task *task;
5138fde0
TM
3492 struct rpc_message msg = {
3493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3494 .rpc_cred = cred,
3495 };
c970aa85
TM
3496 struct rpc_task_setup task_setup_data = {
3497 .rpc_client = server->client,
5138fde0 3498 .rpc_message = &msg,
c970aa85
TM
3499 .callback_ops = &nfs4_delegreturn_ops,
3500 .flags = RPC_TASK_ASYNC,
3501 };
e6f81075 3502 int status = 0;
fe650407 3503
938e1010 3504 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM
3505 if (data == NULL)
3506 return -ENOMEM;
3507 data->args.fhandle = &data->fh;
3508 data->args.stateid = &data->stateid;
fa178f29 3509 data->args.bitmask = server->attr_bitmask;
fe650407
TM
3510 nfs_copy_fh(&data->fh, NFS_FH(inode));
3511 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM
3512 data->res.fattr = &data->fattr;
3513 data->res.server = server;
5f7dbd5c 3514 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3515 nfs_fattr_init(data->res.fattr);
26e976a8 3516 data->timestamp = jiffies;
fe650407
TM
3517 data->rpc_status = 0;
3518
c970aa85 3519 task_setup_data.callback_data = data;
5138fde0
TM
3520 msg.rpc_argp = &data->args,
3521 msg.rpc_resp = &data->res,
c970aa85 3522 task = rpc_run_task(&task_setup_data);
7a1218a2 3523 if (IS_ERR(task))
fe650407 3524 return PTR_ERR(task);
e6f81075
TM
3525 if (!issync)
3526 goto out;
fe650407 3527 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM
3528 if (status != 0)
3529 goto out;
3530 status = data->rpc_status;
3531 if (status != 0)
3532 goto out;
3533 nfs_refresh_inode(inode, &data->fattr);
3534out:
e6b3c4db 3535 rpc_put_task(task);
fe650407 3536 return status;
1da177e4
LT
3537}
3538
e6f81075 3539int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT
3540{
3541 struct nfs_server *server = NFS_SERVER(inode);
3542 struct nfs4_exception exception = { };
3543 int err;
3544 do {
e6f81075 3545 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT
3546 switch (err) {
3547 case -NFS4ERR_STALE_STATEID:
3548 case -NFS4ERR_EXPIRED:
1da177e4
LT
3549 case 0:
3550 return 0;
3551 }
3552 err = nfs4_handle_exception(server, err, &exception);
3553 } while (exception.retry);
3554 return err;
3555}
3556
3557#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3558#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3559
3560/*
3561 * sleep, with exponential backoff, and retry the LOCK operation.
3562 */
3563static unsigned long
3564nfs4_set_lock_task_retry(unsigned long timeout)
3565{
150030b7 3566 schedule_timeout_killable(timeout);
1da177e4
LT
3567 timeout <<= 1;
3568 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3569 return NFS4_LOCK_MAXTIMEOUT;
3570 return timeout;
3571}
3572
1da177e4
LT
3573static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3574{
3575 struct inode *inode = state->inode;
3576 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3577 struct nfs_client *clp = server->nfs_client;
911d1aaf 3578 struct nfs_lockt_args arg = {
1da177e4 3579 .fh = NFS_FH(inode),
911d1aaf 3580 .fl = request,
1da177e4 3581 };
911d1aaf
TM
3582 struct nfs_lockt_res res = {
3583 .denied = request,
1da177e4
LT
3584 };
3585 struct rpc_message msg = {
3586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3587 .rpc_argp = &arg,
3588 .rpc_resp = &res,
3589 .rpc_cred = state->owner->so_cred,
3590 };
1da177e4
LT
3591 struct nfs4_lock_state *lsp;
3592 int status;
3593
911d1aaf 3594 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM
3595 status = nfs4_set_lock_state(state, request);
3596 if (status != 0)
3597 goto out;
3598 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3599 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3600 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM
3601 switch (status) {
3602 case 0:
3603 request->fl_type = F_UNLCK;
3604 break;
3605 case -NFS4ERR_DENIED:
3606 status = 0;
1da177e4 3607 }
70cc6487 3608 request->fl_ops->fl_release_private(request);
8d0a8a9d 3609out:
1da177e4
LT
3610 return status;
3611}
3612
3613static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3614{
3615 struct nfs4_exception exception = { };
3616 int err;
3617
3618 do {
3619 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3620 _nfs4_proc_getlk(state, cmd, request),
3621 &exception);
3622 } while (exception.retry);
3623 return err;
3624}
3625
3626static int do_vfs_lock(struct file *file, struct file_lock *fl)
3627{
3628 int res = 0;
3629 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3630 case FL_POSIX:
3631 res = posix_lock_file_wait(file, fl);
3632 break;
3633 case FL_FLOCK:
3634 res = flock_lock_file_wait(file, fl);
3635 break;
3636 default:
3637 BUG();
3638 }
1da177e4
LT
3639 return res;
3640}
3641
faf5f49c 3642struct nfs4_unlockdata {
911d1aaf
TM
3643 struct nfs_locku_args arg;
3644 struct nfs_locku_res res;
faf5f49c
TM
3645 struct nfs4_lock_state *lsp;
3646 struct nfs_open_context *ctx;
911d1aaf
TM
3647 struct file_lock fl;
3648 const struct nfs_server *server;
26e976a8 3649 unsigned long timestamp;
faf5f49c
TM
3650};
3651
911d1aaf
TM
3652static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3653 struct nfs_open_context *ctx,
3654 struct nfs4_lock_state *lsp,
3655 struct nfs_seqid *seqid)
3656{
3657 struct nfs4_unlockdata *p;
3658 struct inode *inode = lsp->ls_state->inode;
3659
a893693c 3660 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM
3661 if (p == NULL)
3662 return NULL;
3663 p->arg.fh = NFS_FH(inode);
3664 p->arg.fl = &p->fl;
3665 p->arg.seqid = seqid;
c1d51931 3666 p->res.seqid = seqid;
5f7dbd5c 3667 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM
3668 p->arg.stateid = &lsp->ls_stateid;
3669 p->lsp = lsp;
3670 atomic_inc(&lsp->ls_count);
3671 /* Ensure we don't close file until we're done freeing locks! */
3672 p->ctx = get_nfs_open_context(ctx);
3673 memcpy(&p->fl, fl, sizeof(p->fl));
3674 p->server = NFS_SERVER(inode);
3675 return p;
3676}
3677
06f814a3 3678static void nfs4_locku_release_calldata(void *data)
faf5f49c 3679{
963d8fe5 3680 struct nfs4_unlockdata *calldata = data;
911d1aaf 3681 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM
3682 nfs4_put_lock_state(calldata->lsp);
3683 put_nfs_open_context(calldata->ctx);
3684 kfree(calldata);
faf5f49c
TM
3685}
3686
963d8fe5 3687static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3688{
963d8fe5 3689 struct nfs4_unlockdata *calldata = data;
faf5f49c 3690
a893693c
AA
3691 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3692 task->tk_status);
06f814a3
TM
3693 if (RPC_ASSASSINATED(task))
3694 return;
faf5f49c
TM
3695 switch (task->tk_status) {
3696 case 0:
3697 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3698 calldata->res.stateid.data,
faf5f49c 3699 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3700 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3701 break;
9e33bed5
TM
3702 case -NFS4ERR_BAD_STATEID:
3703 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM
3704 case -NFS4ERR_STALE_STATEID:
3705 case -NFS4ERR_EXPIRED:
faf5f49c
TM
3706 break;
3707 default:
9e33bed5 3708 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA
3709 nfs4_restart_rpc(task,
3710 calldata->server->nfs_client);
faf5f49c 3711 }
a893693c
AA
3712 nfs4_sequence_free_slot(calldata->server->nfs_client,
3713 &calldata->res.seq_res);
faf5f49c
TM
3714}
3715
4ce70ada 3716static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3717{
4ce70ada 3718 struct nfs4_unlockdata *calldata = data;
faf5f49c 3719
911d1aaf 3720 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM
3721 return;
3722 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM
3723 /* Note: exit _without_ running nfs4_locku_done */
3724 task->tk_action = NULL;
faf5f49c
TM
3725 return;
3726 }
26e976a8 3727 calldata->timestamp = jiffies;
a893693c
AA
3728 if (nfs4_setup_sequence(calldata->server->nfs_client,
3729 &calldata->arg.seq_args,
3730 &calldata->res.seq_res, 1, task))
3731 return;
5138fde0 3732 rpc_call_start(task);
faf5f49c
TM
3733}
3734
963d8fe5 3735static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3736 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3737 .rpc_call_done = nfs4_locku_done,
06f814a3 3738 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM
3739};
3740
a5d16a4d
TM
3741static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3742 struct nfs_open_context *ctx,
3743 struct nfs4_lock_state *lsp,
3744 struct nfs_seqid *seqid)
3745{
3746 struct nfs4_unlockdata *data;
5138fde0
TM
3747 struct rpc_message msg = {
3748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3749 .rpc_cred = ctx->cred,
3750 };
c970aa85
TM
3751 struct rpc_task_setup task_setup_data = {
3752 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3753 .rpc_message = &msg,
c970aa85 3754 .callback_ops = &nfs4_locku_ops,
101070ca 3755 .workqueue = nfsiod_workqueue,
c970aa85
TM
3756 .flags = RPC_TASK_ASYNC,
3757 };
a5d16a4d 3758
137d6aca
FF
3759 /* Ensure this is an unlock - when canceling a lock, the
3760 * canceled lock is passed in, and it won't be an unlock.
3761 */
3762 fl->fl_type = F_UNLCK;
3763
a5d16a4d
TM
3764 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3765 if (data == NULL) {
3766 nfs_free_seqid(seqid);
3767 return ERR_PTR(-ENOMEM);
3768 }
3769
5138fde0
TM
3770 msg.rpc_argp = &data->arg,
3771 msg.rpc_resp = &data->res,
c970aa85
TM
3772 task_setup_data.callback_data = data;
3773 return rpc_run_task(&task_setup_data);
a5d16a4d
TM
3774}
3775
faf5f49c
TM
3776static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3777{
19e03c57 3778 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3779 struct nfs_seqid *seqid;
1da177e4 3780 struct nfs4_lock_state *lsp;
06f814a3
TM
3781 struct rpc_task *task;
3782 int status = 0;
536ff0f8 3783 unsigned char fl_flags = request->fl_flags;
faf5f49c 3784
8d0a8a9d 3785 status = nfs4_set_lock_state(state, request);
9b073574
TM
3786 /* Unlock _before_ we do the RPC call */
3787 request->fl_flags |= FL_EXISTS;
19e03c57
TM
3788 down_read(&nfsi->rwsem);
3789 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3790 up_read(&nfsi->rwsem);
9b073574 3791 goto out;
19e03c57
TM
3792 }
3793 up_read(&nfsi->rwsem);
8d0a8a9d 3794 if (status != 0)
9b073574
TM
3795 goto out;
3796 /* Is this a delegated lock? */
3797 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3798 goto out;
8d0a8a9d 3799 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3800 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3801 status = -ENOMEM;
911d1aaf 3802 if (seqid == NULL)
9b073574 3803 goto out;
cd3758e3 3804 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM
3805 status = PTR_ERR(task);
3806 if (IS_ERR(task))
9b073574 3807 goto out;
a5d16a4d 3808 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3809 rpc_put_task(task);
9b073574 3810out:
536ff0f8 3811 request->fl_flags = fl_flags;
1da177e4
LT
3812 return status;
3813}
3814
a5d16a4d
TM
3815struct nfs4_lockdata {
3816 struct nfs_lock_args arg;
3817 struct nfs_lock_res res;
3818 struct nfs4_lock_state *lsp;
3819 struct nfs_open_context *ctx;
3820 struct file_lock fl;
26e976a8 3821 unsigned long timestamp;
a5d16a4d
TM
3822 int rpc_status;
3823 int cancelled;
66179efe 3824 struct nfs_server *server;
a5d16a4d
TM
3825};
3826
3827static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3828 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3829{
a5d16a4d
TM
3830 struct nfs4_lockdata *p;
3831 struct inode *inode = lsp->ls_state->inode;
1da177e4 3832 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM
3833
3834 p = kzalloc(sizeof(*p), GFP_KERNEL);
3835 if (p == NULL)
3836 return NULL;
3837
3838 p->arg.fh = NFS_FH(inode);
3839 p->arg.fl = &p->fl;
2f74c0a0
TM
3840 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3841 if (p->arg.open_seqid == NULL)
3842 goto out_free;
a5d16a4d
TM
3843 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3844 if (p->arg.lock_seqid == NULL)
2f74c0a0 3845 goto out_free_seqid;
a5d16a4d 3846 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3847 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3848 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3849 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3850 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3851 p->lsp = lsp;
66179efe 3852 p->server = server;
a5d16a4d
TM
3853 atomic_inc(&lsp->ls_count);
3854 p->ctx = get_nfs_open_context(ctx);
3855 memcpy(&p->fl, fl, sizeof(p->fl));
3856 return p;
2f74c0a0
TM
3857out_free_seqid:
3858 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM
3859out_free:
3860 kfree(p);
3861 return NULL;
3862}
3863
3864static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3865{
3866 struct nfs4_lockdata *data = calldata;
3867 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3868
3110ff80 3869 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM
3870 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3871 return;
a5d16a4d
TM
3872 /* Do we need to do an open_to_lock_owner? */
3873 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM
3874 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3875 return;
a5d16a4d
TM
3876 data->arg.open_stateid = &state->stateid;
3877 data->arg.new_lock_owner = 1;
c1d51931 3878 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM
3879 } else
3880 data->arg.new_lock_owner = 0;
26e976a8 3881 data->timestamp = jiffies;
66179efe
AA
3882 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3883 &data->res.seq_res, 1, task))
3884 return;
5138fde0 3885 rpc_call_start(task);
3110ff80 3886 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM
3887}
3888
3889static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3890{
3891 struct nfs4_lockdata *data = calldata;
3892
3110ff80 3893 dprintk("%s: begin!\n", __func__);
a5d16a4d 3894
66179efe
AA
3895 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3896 task->tk_status);
3897
a5d16a4d
TM
3898 data->rpc_status = task->tk_status;
3899 if (RPC_ASSASSINATED(task))
3900 goto out;
3901 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM
3902 if (data->rpc_status == 0)
3903 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3904 else
3905 goto out;
3906 }
3907 if (data->rpc_status == 0) {
3908 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3909 sizeof(data->lsp->ls_stateid.data));
3910 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3911 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3912 }
a5d16a4d 3913out:
3110ff80 3914 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM
3915}
3916
3917static void nfs4_lock_release(void *calldata)
3918{
3919 struct nfs4_lockdata *data = calldata;
3920
3110ff80 3921 dprintk("%s: begin!\n", __func__);
2f74c0a0 3922 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM
3923 if (data->cancelled != 0) {
3924 struct rpc_task *task;
3925 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3926 data->arg.lock_seqid);
3927 if (!IS_ERR(task))
e6b3c4db 3928 rpc_put_task(task);
3110ff80 3929 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM
3930 } else
3931 nfs_free_seqid(data->arg.lock_seqid);
3932 nfs4_put_lock_state(data->lsp);
3933 put_nfs_open_context(data->ctx);
3934 kfree(data);
3110ff80 3935 dprintk("%s: done!\n", __func__);
a5d16a4d
TM
3936}
3937
3938static const struct rpc_call_ops nfs4_lock_ops = {
3939 .rpc_call_prepare = nfs4_lock_prepare,
3940 .rpc_call_done = nfs4_lock_done,
3941 .rpc_release = nfs4_lock_release,
3942};
3943
3944static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3945{
3946 struct nfs4_lockdata *data;
3947 struct rpc_task *task;
5138fde0
TM
3948 struct rpc_message msg = {
3949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3950 .rpc_cred = state->owner->so_cred,
3951 };
c970aa85
TM
3952 struct rpc_task_setup task_setup_data = {
3953 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3954 .rpc_message = &msg,
c970aa85 3955 .callback_ops = &nfs4_lock_ops,
101070ca 3956 .workqueue = nfsiod_workqueue,
c970aa85
TM
3957 .flags = RPC_TASK_ASYNC,
3958 };
a5d16a4d
TM
3959 int ret;
3960
3110ff80 3961 dprintk("%s: begin!\n", __func__);
cd3758e3 3962 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM
3963 fl->fl_u.nfs4_fl.owner);
3964 if (data == NULL)
3965 return -ENOMEM;
3966 if (IS_SETLKW(cmd))
3967 data->arg.block = 1;
3968 if (reclaim != 0)
3969 data->arg.reclaim = 1;
5138fde0
TM
3970 msg.rpc_argp = &data->arg,
3971 msg.rpc_resp = &data->res,
c970aa85
TM
3972 task_setup_data.callback_data = data;
3973 task = rpc_run_task(&task_setup_data);
7a1218a2 3974 if (IS_ERR(task))
a5d16a4d 3975 return PTR_ERR(task);
a5d16a4d
TM
3976 ret = nfs4_wait_for_completion_rpc_task(task);
3977 if (ret == 0) {
3978 ret = data->rpc_status;
3979 if (ret == -NFS4ERR_DENIED)
3980 ret = -EAGAIN;
3981 } else
3982 data->cancelled = 1;
e6b3c4db 3983 rpc_put_task(task);
3110ff80 3984 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3985 return ret;
1da177e4
LT
3986}
3987
3988static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3989{
202b50dc
TM
3990 struct nfs_server *server = NFS_SERVER(state->inode);
3991 struct nfs4_exception exception = { };
3992 int err;
3993
3994 do {
42a2d13e
TM
3995 /* Cache the lock if possible... */
3996 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3997 return 0;
202b50dc
TM
3998 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3999 if (err != -NFS4ERR_DELAY)
4000 break;
4001 nfs4_handle_exception(server, err, &exception);
4002 } while (exception.retry);
4003 return err;
1da177e4
LT
4004}
4005
4006static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4007{
202b50dc
TM
4008 struct nfs_server *server = NFS_SERVER(state->inode);
4009 struct nfs4_exception exception = { };
4010 int err;
4011
6bfc93ef
TM
4012 err = nfs4_set_lock_state(state, request);
4013 if (err != 0)
4014 return err;
202b50dc 4015 do {
42a2d13e
TM
4016 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4017 return 0;
202b50dc
TM
4018 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4019 if (err != -NFS4ERR_DELAY)
4020 break;
4021 nfs4_handle_exception(server, err, &exception);
4022 } while (exception.retry);
4023 return err;
1da177e4
LT
4024}
4025
4026static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4027{
19e03c57 4028 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4029 unsigned char fl_flags = request->fl_flags;
1da177e4
LT
4030 int status;
4031
6bfc93ef 4032 /* Is this a delegated open? */
6bfc93ef
TM
4033 status = nfs4_set_lock_state(state, request);
4034 if (status != 0)
4035 goto out;
01c3b861
TM
4036 request->fl_flags |= FL_ACCESS;
4037 status = do_vfs_lock(request->fl_file, request);
4038 if (status < 0)
4039 goto out;
19e03c57 4040 down_read(&nfsi->rwsem);
01c3b861 4041 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4042 /* Yes: cache locks! */
01c3b861 4043 /* ...but avoid races with delegation recall... */
19e03c57
TM
4044 request->fl_flags = fl_flags & ~FL_SLEEP;
4045 status = do_vfs_lock(request->fl_file, request);
4046 goto out_unlock;
01c3b861 4047 }
6bfc93ef
TM
4048 status = _nfs4_do_setlk(state, cmd, request, 0);
4049 if (status != 0)
01c3b861 4050 goto out_unlock;
6bfc93ef 4051 /* Note: we always want to sleep here! */
01c3b861 4052 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4053 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4054 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4055out_unlock:
19e03c57 4056 up_read(&nfsi->rwsem);
01c3b861
TM
4057out:
4058 request->fl_flags = fl_flags;
1da177e4
LT
4059 return status;
4060}
4061
4062static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4063{
4064 struct nfs4_exception exception = { };
4065 int err;
4066
4067 do {
4068 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4069 _nfs4_proc_setlk(state, cmd, request),
4070 &exception);
4071 } while (exception.retry);
4072 return err;
4073}
4074
4075static int
4076nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4077{
4078 struct nfs_open_context *ctx;
4079 struct nfs4_state *state;
4080 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4081 int status;
4082
4083 /* verify open state */
cd3758e3 4084 ctx = nfs_file_open_context(filp);
1da177e4
LT
4085 state = ctx->state;
4086
4087 if (request->fl_start < 0 || request->fl_end < 0)
4088 return -EINVAL;
4089
4090 if (IS_GETLK(cmd))
4091 return nfs4_proc_getlk(state, F_GETLK, request);
4092
4093 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4094 return -EINVAL;
4095
4096 if (request->fl_type == F_UNLCK)
4097 return nfs4_proc_unlck(state, cmd, request);
4098
4099 do {
4100 status = nfs4_proc_setlk(state, cmd, request);
4101 if ((status != -EAGAIN) || IS_SETLK(cmd))
4102 break;
4103 timeout = nfs4_set_lock_task_retry(timeout);
4104 status = -ERESTARTSYS;
4105 if (signalled())
4106 break;
4107 } while(status < 0);
1da177e4
LT
4108 return status;
4109}
4110
888e694c
TM
4111int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4112{
4113 struct nfs_server *server = NFS_SERVER(state->inode);
4114 struct nfs4_exception exception = { };
4115 int err;
4116
4117 err = nfs4_set_lock_state(state, fl);
4118 if (err != 0)
4119 goto out;
4120 do {
4121 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4122 if (err != -NFS4ERR_DELAY)
4123 break;
4124 err = nfs4_handle_exception(server, err, &exception);
4125 } while (exception.retry);
4126out:
4127 return err;
4128}
6b3b5496 4129
aa1870af
BF
4130#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4131
6b3b5496
BF
4132int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4133 size_t buflen, int flags)
4134{
4b580ee3
BF
4135 struct inode *inode = dentry->d_inode;
4136
4137 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4138 return -EOPNOTSUPP;
4139
4b580ee3 4140 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF
4141}
4142
4143/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4144 * and that's what we'll do for e.g. user attributes that haven't been set.
4145 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4146 * attributes in kernel-managed attribute namespaces. */
4147ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4148 size_t buflen)
4149{
aa1870af
BF
4150 struct inode *inode = dentry->d_inode;
4151
4152 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4153 return -EOPNOTSUPP;
4154
4155 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF
4156}
4157
4158ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4159{
aa1870af 4160 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4161
096455a2
BF
4162 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4163 return 0;
6b3b5496
BF
4164 if (buf && buflen < len)
4165 return -ERANGE;
4166 if (buf)
aa1870af
BF
4167 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4168 return len;
6b3b5496
BF
4169}
4170
69aaaae1
TM
4171static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4172{
4173 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4174 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4175 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4176 return;
4177
4178 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4179 NFS_ATTR_FATTR_NLINK;
4180 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4181 fattr->nlink = 2;
4182}
4183
56659e99 4184int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4185 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM
4186{
4187 struct nfs_server *server = NFS_SERVER(dir);
4188 u32 bitmask[2] = {
361e624f
MN
4189 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4190 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM
4191 };
4192 struct nfs4_fs_locations_arg args = {
4193 .dir_fh = NFS_FH(dir),
c228fd3a 4194 .name = name,
683b57b4
TM
4195 .page = page,
4196 .bitmask = bitmask,
4197 };
22958463
BH
4198 struct nfs4_fs_locations_res res = {
4199 .fs_locations = fs_locations,
4200 };
683b57b4
TM
4201 struct rpc_message msg = {
4202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4203 .rpc_argp = &args,
22958463 4204 .rpc_resp = &res,
683b57b4
TM
4205 };
4206 int status;
4207
3110ff80 4208 dprintk("%s: start\n", __func__);
c228fd3a 4209 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4210 fs_locations->server = server;
830b8e33 4211 fs_locations->nlocations = 0;
cccef3b9 4212 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4213 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4214 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM
4215 return status;
4216}
4217
557134a3 4218#ifdef CONFIG_NFS_V4_1
99fe60d0
BH
4219/*
4220 * nfs4_proc_exchange_id()
4221 *
4222 * Since the clientid has expired, all compounds using sessions
4223 * associated with the stale clientid will be returning
4224 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4225 * be in some phase of session reset.
4226 */
4227static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4228{
4229 nfs4_verifier verifier;
4230 struct nfs41_exchange_id_args args = {
4231 .client = clp,
4232 .flags = clp->cl_exchange_flags,
4233 };
4234 struct nfs41_exchange_id_res res = {
4235 .client = clp,
4236 };
4237 int status;
4238 struct rpc_message msg = {
4239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4240 .rpc_argp = &args,
4241 .rpc_resp = &res,
4242 .rpc_cred = cred,
4243 };
4244 __be32 *p;
4245
4246 dprintk("--> %s\n", __func__);
4247 BUG_ON(clp == NULL);
a7b72103 4248
99fe60d0
BH
4249 p = (u32 *)verifier.data;
4250 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4251 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4252 args.verifier = &verifier;
4253
4254 while (1) {
4255 args.id_len = scnprintf(args.id, sizeof(args.id),
4256 "%s/%s %u",
4257 clp->cl_ipaddr,
4258 rpc_peeraddr2str(clp->cl_rpcclient,
4259 RPC_DISPLAY_ADDR),
4260 clp->cl_id_uniquifier);
4261
4262 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4263
4264 if (status != NFS4ERR_CLID_INUSE)
4265 break;
4266
4267 if (signalled())
4268 break;
4269
4270 if (++clp->cl_id_uniquifier == 0)
4271 break;
4272 }
4273
4274 dprintk("<-- %s status= %d\n", __func__, status);
4275 return status;
4276}
4277
2050f0cc
AA
4278struct nfs4_get_lease_time_data {
4279 struct nfs4_get_lease_time_args *args;
4280 struct nfs4_get_lease_time_res *res;
4281 struct nfs_client *clp;
4282};
4283
4284static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4285 void *calldata)
4286{
4287 int ret;
4288 struct nfs4_get_lease_time_data *data =
4289 (struct nfs4_get_lease_time_data *)calldata;
4290
4291 dprintk("--> %s\n", __func__);
4292 /* just setup sequence, do not trigger session recovery
4293 since we're invoked within one */
4294 ret = nfs41_setup_sequence(data->clp->cl_session,
4295 &data->args->la_seq_args,
4296 &data->res->lr_seq_res, 0, task);
4297
4298 BUG_ON(ret == -EAGAIN);
4299 rpc_call_start(task);
4300 dprintk("<-- %s\n", __func__);
4301}
4302
4303/*
4304 * Called from nfs4_state_manager thread for session setup, so don't recover
4305 * from sequence operation or clientid errors.
4306 */
4307static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4308{
4309 struct nfs4_get_lease_time_data *data =
4310 (struct nfs4_get_lease_time_data *)calldata;
4311
4312 dprintk("--> %s\n", __func__);
4313 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4314 switch (task->tk_status) {
4315 case -NFS4ERR_DELAY:
4316 case -NFS4ERR_GRACE:
4317 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4318 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4319 task->tk_status = 0;
eedc020e 4320 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA
4321 return;
4322 }
4323 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4324 dprintk("<-- %s\n", __func__);
4325}
4326
4327struct rpc_call_ops nfs4_get_lease_time_ops = {
4328 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4329 .rpc_call_done = nfs4_get_lease_time_done,
4330};
4331
4332int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4333{
4334 struct rpc_task *task;
4335 struct nfs4_get_lease_time_args args;
4336 struct nfs4_get_lease_time_res res = {
4337 .lr_fsinfo = fsinfo,
4338 };
4339 struct nfs4_get_lease_time_data data = {
4340 .args = &args,
4341 .res = &res,
4342 .clp = clp,
4343 };
4344 struct rpc_message msg = {
4345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4346 .rpc_argp = &args,
4347 .rpc_resp = &res,
4348 };
4349 struct rpc_task_setup task_setup = {
4350 .rpc_client = clp->cl_rpcclient,
4351 .rpc_message = &msg,
4352 .callback_ops = &nfs4_get_lease_time_ops,
4353 .callback_data = &data
4354 };
4355 int status;
4356
4357 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4358 dprintk("--> %s\n", __func__);
4359 task = rpc_run_task(&task_setup);
4360
4361 if (IS_ERR(task))
4362 status = PTR_ERR(task);
4363 else {
4364 status = task->tk_status;
4365 rpc_put_task(task);
4366 }
4367 dprintk("<-- %s return %d\n", __func__, status);
4368
4369 return status;
4370}
4371
ac72b7b3
AA
4372/* Reset a slot table */
4373static int nfs4_reset_slot_table(struct nfs4_session *session)
4374{
4375 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4376 int i, max_slots = session->fc_attrs.max_reqs;
4377 int old_max_slots = session->fc_slot_table.max_slots;
4378 int ret = 0;
4379
4380 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
4381 session->fc_attrs.max_reqs, tbl);
4382
4383 /* Until we have dynamic slot table adjustment, insist
4384 * upon the same slot table size */
4385 if (max_slots != old_max_slots) {
4386 dprintk("%s reset slot table does't match old\n",
4387 __func__);
4388 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4389 goto out;
4390 }
4391 spin_lock(&tbl->slot_tbl_lock);
4392 for (i = 0; i < max_slots; ++i)
4393 tbl->slots[i].seq_nr = 1;
4394 tbl->highest_used_slotid = -1;
4395 spin_unlock(&tbl->slot_tbl_lock);
4396 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4397 tbl, tbl->slots, tbl->max_slots);
4398out:
4399 dprintk("<-- %s: return %d\n", __func__, ret);
4400 return ret;
4401}
4402
fc931582
AA
4403/*
4404 * Initialize slot table
4405 */
4406static int nfs4_init_slot_table(struct nfs4_session *session)
4407{
4408 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4409 int i, max_slots = session->fc_attrs.max_reqs;
4410 struct nfs4_slot *slot;
4411 int ret = -ENOMEM;
4412
4413 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4414
4415 dprintk("--> %s: max_reqs=%u\n", __func__,
4416 session->fc_attrs.max_reqs);
4417
4418 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4419 if (!slot)
4420 goto out;
4421 for (i = 0; i < max_slots; ++i)
4422 slot[i].seq_nr = 1;
4423 ret = 0;
4424
4425 spin_lock(&tbl->slot_tbl_lock);
4426 if (tbl->slots != NULL) {
4427 spin_unlock(&tbl->slot_tbl_lock);
4428 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4429 __func__, tbl, tbl->slots);
4430 WARN_ON(1);
4431 goto out_free;
4432 }
4433 tbl->max_slots = max_slots;
4434 tbl->slots = slot;
4435 tbl->highest_used_slotid = -1; /* no slot is currently used */
4436 spin_unlock(&tbl->slot_tbl_lock);
4437 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4438 tbl, tbl->slots, tbl->max_slots);
4439out:
4440 dprintk("<-- %s: return %d\n", __func__, ret);
4441 return ret;
4442out_free:
4443 kfree(slot);
4444 goto out;
4445}
4446
557134a3
AA
4447/* Destroy the slot table */
4448static void nfs4_destroy_slot_table(struct nfs4_session *session)
4449{
4450 if (session->fc_slot_table.slots == NULL)
4451 return;
4452 kfree(session->fc_slot_table.slots);
4453 session->fc_slot_table.slots = NULL;
4454 return;
4455}
4456
4457struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4458{
4459 struct nfs4_session *session;
4460 struct nfs4_slot_table *tbl;
4461
4462 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4463 if (!session)
4464 return NULL;
76db6d95
AA
4465
4466 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4467 /*
4468 * The create session reply races with the server back
4469 * channel probe. Mark the client NFS_CS_SESSION_INITING
4470 * so that the client back channel can find the
4471 * nfs_client struct
4472 */
4473 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4474
557134a3
AA
4475 tbl = &session->fc_slot_table;
4476 spin_lock_init(&tbl->slot_tbl_lock);
4477 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4478 session->clp = clp;
4479 return session;
4480}
4481
4482void nfs4_destroy_session(struct nfs4_session *session)
4483{
4484 nfs4_destroy_slot_table(session);
4485 kfree(session);
4486}
4487
fc931582
AA
4488/*
4489 * Initialize the values to be used by the client in CREATE_SESSION
4490 * If nfs4_init_session set the fore channel request and response sizes,
4491 * use them.
4492 *
4493 * Set the back channel max_resp_sz_cached to zero to force the client to
4494 * always set csa_cachethis to FALSE because the current implementation
4495 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4496 */
4497static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4498{
4499 struct nfs4_session *session = args->client->cl_session;
4500 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4501 mxresp_sz = session->fc_attrs.max_resp_sz;
4502
4503 if (mxrqst_sz == 0)
4504 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4505 if (mxresp_sz == 0)
4506 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4507 /* Fore channel attributes */
4508 args->fc_attrs.headerpadsz = 0;
4509 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4510 args->fc_attrs.max_resp_sz = mxresp_sz;
4511 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4512 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4513 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4514
4515 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4516 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4517 __func__,
4518 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4519 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4520 args->fc_attrs.max_reqs);
4521
4522 /* Back channel attributes */
4523 args->bc_attrs.headerpadsz = 0;
4524 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4525 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4526 args->bc_attrs.max_resp_sz_cached = 0;
4527 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4528 args->bc_attrs.max_reqs = 1;
4529
4530 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4531 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4532 __func__,
4533 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4534 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4535 args->bc_attrs.max_reqs);
4536}
4537
8d35301d
AA
4538static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4539{
4540 if (rcvd <= sent)
4541 return 0;
4542 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4543 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4544 return -EINVAL;
4545}
4546
4547#define _verify_fore_channel_attr(_name_) \
4548 _verify_channel_attr("fore", #_name_, \
4549 args->fc_attrs._name_, \
4550 session->fc_attrs._name_)
4551
4552#define _verify_back_channel_attr(_name_) \
4553 _verify_channel_attr("back", #_name_, \
4554 args->bc_attrs._name_, \
4555 session->bc_attrs._name_)
4556
4557/*
4558 * The server is not allowed to increase the fore channel header pad size,
4559 * maximum response size, or maximum number of operations.
4560 *
4561 * The back channel attributes are only negotiatied down: We send what the
4562 * (back channel) server insists upon.
4563 */
4564static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4565 struct nfs4_session *session)
4566{
4567 int ret = 0;
4568
4569 ret |= _verify_fore_channel_attr(headerpadsz);
4570 ret |= _verify_fore_channel_attr(max_resp_sz);
4571 ret |= _verify_fore_channel_attr(max_ops);
4572
4573 ret |= _verify_back_channel_attr(headerpadsz);
4574 ret |= _verify_back_channel_attr(max_rqst_sz);
4575 ret |= _verify_back_channel_attr(max_resp_sz);
4576 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4577 ret |= _verify_back_channel_attr(max_ops);
4578 ret |= _verify_back_channel_attr(max_reqs);
4579
4580 return ret;
4581}
4582
fc931582
AA
4583static int _nfs4_proc_create_session(struct nfs_client *clp)
4584{
4585 struct nfs4_session *session = clp->cl_session;
4586 struct nfs41_create_session_args args = {
4587 .client = clp,
4588 .cb_program = NFS4_CALLBACK,
4589 };
4590 struct nfs41_create_session_res res = {
4591 .client = clp,
4592 };
4593 struct rpc_message msg = {
4594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4595 .rpc_argp = &args,
4596 .rpc_resp = &res,
4597 };
4598 int status;
4599
4600 nfs4_init_channel_attrs(&args);
4601 args.flags = (SESSION4_PERSIST);
4602
4603 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4604
8d35301d
AA
4605 if (!status)
4606 /* Verify the session's negotiated channel_attrs values */
4607 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA
4608 if (!status) {
4609 /* Increment the clientid slot sequence id */
4610 clp->cl_seqid++;
4611 }
4612
4613 return status;
4614}
4615
4616/*
4617 * Issues a CREATE_SESSION operation to the server.
4618 * It is the responsibility of the caller to verify the session is
4619 * expired before calling this routine.
4620 */
ac72b7b3 4621int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA
4622{
4623 int status;
4624 unsigned *ptr;
4625 struct nfs_fsinfo fsinfo;
4626 struct nfs4_session *session = clp->cl_session;
4627
4628 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4629
4630 status = _nfs4_proc_create_session(clp);
4631 if (status)
4632 goto out;
4633
ac72b7b3
AA
4634 /* Init or reset the fore channel */
4635 if (reset)
4636 status = nfs4_reset_slot_table(session);
4637 else
4638 status = nfs4_init_slot_table(session);
fc931582
AA
4639 dprintk("fore channel slot table initialization returned %d\n", status);
4640 if (status)
4641 goto out;
4642
4643 ptr = (unsigned *)&session->sess_id.data[0];
4644 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4645 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4646
ac72b7b3
AA
4647 if (reset)
4648 /* Lease time is aleady set */
4649 goto out;
4650
fc931582
AA
4651 /* Get the lease time */
4652 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4653 if (status == 0) {
4654 /* Update lease time and schedule renewal */
4655 spin_lock(&clp->cl_lock);
4656 clp->cl_lease_time = fsinfo.lease_time * HZ;
4657 clp->cl_last_renewal = jiffies;
4658 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4659 spin_unlock(&clp->cl_lock);
4660
4661 nfs4_schedule_state_renewal(clp);
4662 }
4663out:
4664 dprintk("<-- %s\n", __func__);
4665 return status;
4666}
4667
0f3e66c6
AA
4668/*
4669 * Issue the over-the-wire RPC DESTROY_SESSION.
4670 * The caller must serialize access to this routine.
4671 */
4672int nfs4_proc_destroy_session(struct nfs4_session *session)
4673{
4674 int status = 0;
4675 struct rpc_message msg;
4676
4677 dprintk("--> nfs4_proc_destroy_session\n");
4678
4679 /* session is still being setup */
4680 if (session->clp->cl_cons_state != NFS_CS_READY)
4681 return status;
4682
4683 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4684 msg.rpc_argp = session;
4685 msg.rpc_resp = NULL;
4686 msg.rpc_cred = NULL;
4687 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4688
4689 if (status)
4690 printk(KERN_WARNING
4691 "Got error %d from the server on DESTROY_SESSION. "
4692 "Session has been destroyed regardless...\n", status);
4693
4694 dprintk("<-- nfs4_proc_destroy_session\n");
4695 return status;
4696}
4697
fc01cea9
AA
4698/*
4699 * Renew the cl_session lease.
4700 */
4701static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4702{
4703 struct nfs4_sequence_args args;
4704 struct nfs4_sequence_res res;
4705
4706 struct rpc_message msg = {
4707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4708 .rpc_argp = &args,
4709 .rpc_resp = &res,
4710 .rpc_cred = cred,
4711 };
4712
4713 args.sa_cache_this = 0;
4714
4715 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4716 &res, 0);
4717}
4718
4719void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4720{
4721 struct nfs_client *clp = (struct nfs_client *)data;
4722
4723 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4724
4725 if (task->tk_status < 0) {
4726 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4727
4728 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4729 == -EAGAIN) {
eedc020e 4730 nfs4_restart_rpc(task, clp);
fc01cea9
AA
4731 return;
4732 }
4733 }
4734 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4735 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4736
4737 put_rpccred(task->tk_msg.rpc_cred);
4738 kfree(task->tk_msg.rpc_argp);
4739 kfree(task->tk_msg.rpc_resp);
4740
4741 dprintk("<-- %s\n", __func__);
4742}
4743
4744static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4745{
4746 struct nfs_client *clp;
4747 struct nfs4_sequence_args *args;
4748 struct nfs4_sequence_res *res;
4749
4750 clp = (struct nfs_client *)data;
4751 args = task->tk_msg.rpc_argp;
4752 res = task->tk_msg.rpc_resp;
4753
4754 if (nfs4_setup_sequence(clp, args, res, 0, task))
4755 return;
4756 rpc_call_start(task);
4757}
4758
4759static const struct rpc_call_ops nfs41_sequence_ops = {
4760 .rpc_call_done = nfs41_sequence_call_done,
4761 .rpc_call_prepare = nfs41_sequence_prepare,
4762};
4763
4764static int nfs41_proc_async_sequence(struct nfs_client *clp,
4765 struct rpc_cred *cred)
4766{
4767 struct nfs4_sequence_args *args;
4768 struct nfs4_sequence_res *res;
4769 struct rpc_message msg = {
4770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4771 .rpc_cred = cred,
4772 };
4773
4774 args = kzalloc(sizeof(*args), GFP_KERNEL);
4775 if (!args)
4776 return -ENOMEM;
4777 res = kzalloc(sizeof(*res), GFP_KERNEL);
4778 if (!res) {
4779 kfree(args);
4780 return -ENOMEM;
4781 }
4782 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4783 msg.rpc_argp = args;
4784 msg.rpc_resp = res;
4785
4786 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4787 &nfs41_sequence_ops, (void *)clp);
4788}
4789
557134a3
AA
4790#endif /* CONFIG_NFS_V4_1 */
4791
591d71cb 4792struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4793 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4794 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT
4795 .recover_open = nfs4_open_reclaim,
4796 .recover_lock = nfs4_lock_reclaim,
591d71cb 4797 .establish_clid = nfs4_init_clientid,
90a16617 4798 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT
4799};
4800
591d71cb
AA
4801#if defined(CONFIG_NFS_V4_1)
4802struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4803 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4804 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4805 .recover_open = nfs4_open_reclaim,
4806 .recover_lock = nfs4_lock_reclaim,
4807 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4808 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA
4809};
4810#endif /* CONFIG_NFS_V4_1 */
4811
4812struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4813 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4814 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4815 .recover_open = nfs4_open_expired,
4816 .recover_lock = nfs4_lock_expired,
4817 .establish_clid = nfs4_init_clientid,
90a16617 4818 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA
4819};
4820
4821#if defined(CONFIG_NFS_V4_1)
4822struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4823 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4824 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT
4825 .recover_open = nfs4_open_expired,
4826 .recover_lock = nfs4_lock_expired,
591d71cb 4827 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4828 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4829};
591d71cb 4830#endif /* CONFIG_NFS_V4_1 */
1da177e4 4831
29fba38b
BH
4832struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4833 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4834 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4835 .renew_lease = nfs4_proc_renew,
29fba38b
BH
4836};
4837
4838#if defined(CONFIG_NFS_V4_1)
4839struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4840 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4841 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4842 .renew_lease = nfs4_proc_sequence,
29fba38b
BH
4843};
4844#endif
4845
4846/*
4847 * Per minor version reboot and network partition recovery ops
4848 */
4849
591d71cb
AA
4850struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4851 &nfs40_reboot_recovery_ops,
4852#if defined(CONFIG_NFS_V4_1)
4853 &nfs41_reboot_recovery_ops,
4854#endif
4855};
4856
4857struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4858 &nfs40_nograce_recovery_ops,
4859#if defined(CONFIG_NFS_V4_1)
4860 &nfs41_nograce_recovery_ops,
4861#endif
4862};
4863
29fba38b
BH
4864struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4865 &nfs40_state_renewal_ops,
4866#if defined(CONFIG_NFS_V4_1)
4867 &nfs41_state_renewal_ops,
4868#endif
4869};
4870
92e1d5be 4871static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF
4872 .permission = nfs_permission,
4873 .getattr = nfs_getattr,
4874 .setattr = nfs_setattr,
4875 .getxattr = nfs4_getxattr,
4876 .setxattr = nfs4_setxattr,
4877 .listxattr = nfs4_listxattr,
4878};
4879
509de811 4880const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT
4881 .version = 4, /* protocol version */
4882 .dentry_ops = &nfs4_dentry_operations,
4883 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4884 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT
4885 .getroot = nfs4_proc_get_root,
4886 .getattr = nfs4_proc_getattr,
4887 .setattr = nfs4_proc_setattr,
2b3de441 4888 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT
4889 .lookup = nfs4_proc_lookup,
4890 .access = nfs4_proc_access,
4891 .readlink = nfs4_proc_readlink,
1da177e4
LT
4892 .create = nfs4_proc_create,
4893 .remove = nfs4_proc_remove,
4894 .unlink_setup = nfs4_proc_unlink_setup,
4895 .unlink_done = nfs4_proc_unlink_done,
4896 .rename = nfs4_proc_rename,
4897 .link = nfs4_proc_link,
4898 .symlink = nfs4_proc_symlink,
4899 .mkdir = nfs4_proc_mkdir,
4900 .rmdir = nfs4_proc_remove,
4901 .readdir = nfs4_proc_readdir,
4902 .mknod = nfs4_proc_mknod,
4903 .statfs = nfs4_proc_statfs,
4904 .fsinfo = nfs4_proc_fsinfo,
4905 .pathconf = nfs4_proc_pathconf,
e9326dca 4906 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT
4907 .decode_dirent = nfs4_decode_dirent,
4908 .read_setup = nfs4_proc_read_setup,
ec06c096 4909 .read_done = nfs4_read_done,
1da177e4 4910 .write_setup = nfs4_proc_write_setup,
788e7a89 4911 .write_done = nfs4_write_done,
1da177e4 4912 .commit_setup = nfs4_proc_commit_setup,
788e7a89 4913 .commit_done = nfs4_commit_done,
1da177e4 4914 .lock = nfs4_proc_lock,
e50a1c2e 4915 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 4916 .close_context = nfs4_close_context,
1da177e4
LT
4917};
4918
4919/*
4920 * Local variables:
4921 * c-basic-offset: 8
4922 * End:
4923 */