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nfs41: lock sequence setup/done support
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 66static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 68
1da177e4 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT		 71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT		 75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM		 196static int nfs4_wait_clnt_recover(struct nfs_client *clp)
197{
198 int res;
199
200 might_sleep();
201
e005e804 202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 203 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 204 return res;
205}
206
207static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
208{
209 int res = 0;
210
211 might_sleep();
212
213 if (*timeout <= 0)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
219 res = -ERESTARTSYS;
220 *timeout <<= 1;
221 return res;
222}
223
224/* This is the error handling routine for processes that are allowed
225 * to sleep.
226 */
227static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
228{
229 struct nfs_client *clp = server->nfs_client;
9e33bed5 230 struct nfs4_state *state = exception->state;
65de872e
TM		 231 int ret = errorcode;
232
233 exception->retry = 0;
234 switch(errorcode) {
235 case 0:
236 return 0;
9e33bed5
TM		 237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
240 if (state == NULL)
241 break;
242 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
248 if (ret == 0)
249 exception->retry = 1;
250 break;
251 case -NFS4ERR_FILE_OPEN:
252 case -NFS4ERR_GRACE:
253 case -NFS4ERR_DELAY:
254 ret = nfs4_delay(server->client, &exception->timeout);
255 if (ret != 0)
256 break;
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
259 }
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
262}
263
264
26e976a8 265static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 266{
7539bbab 267 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
272}
273
cccef3b9
AA		 274#if defined(CONFIG_NFS_V4_1)
275
e2c4ab3c
AA		 276/*
277 * nfs4_free_slot - free a slot and efficiently update slot table.
278 *
279 * freeing a slot is trivially done by clearing its respective bit
280 * in the bitmap.
281 * If the freed slotid equals highest_used_slotid we want to update it
282 * so that the server would be able to size down the slot table if needed,
283 * otherwise we know that the highest_used_slotid is still in use.
284 * When updating highest_used_slotid there may be "holes" in the bitmap
285 * so we need to scan down from highest_used_slotid to 0 looking for the now
286 * highest slotid in use.
287 * If none found, highest_used_slotid is set to -1.
288 */
289static void
290nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
291{
292 int slotid = free_slotid;
293
294 spin_lock(&tbl->slot_tbl_lock);
295 /* clear used bit in bitmap */
296 __clear_bit(slotid, tbl->used_slots);
297
298 /* update highest_used_slotid when it is freed */
299 if (slotid == tbl->highest_used_slotid) {
300 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
301 if (slotid >= 0 && slotid < tbl->max_slots)
302 tbl->highest_used_slotid = slotid;
303 else
304 tbl->highest_used_slotid = -1;
305 }
306 rpc_wake_up_next(&tbl->slot_tbl_waitq);
307 spin_unlock(&tbl->slot_tbl_lock);
308 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
309 free_slotid, tbl->highest_used_slotid);
310}
311
13615871
AA		 312void nfs41_sequence_free_slot(const struct nfs_client *clp,
313 struct nfs4_sequence_res *res)
314{
315 struct nfs4_slot_table *tbl;
316
317 if (!nfs4_has_session(clp)) {
318 dprintk("%s: No session\n", __func__);
319 return;
320 }
321 tbl = &clp->cl_session->fc_slot_table;
322 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
323 dprintk("%s: No slot\n", __func__);
324 /* just wake up the next guy waiting since
325 * we may have not consumed a slot after all */
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 return;
328 }
329 nfs4_free_slot(tbl, res->sr_slotid);
330 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
331}
332
b0df806c
AA		 333static void nfs41_sequence_done(struct nfs_client *clp,
334 struct nfs4_sequence_res *res,
335 int rpc_status)
336{
337 unsigned long timestamp;
338 struct nfs4_slot_table *tbl;
339 struct nfs4_slot *slot;
340
341 /*
342 * sr_status remains 1 if an RPC level error occurred. The server
343 * may or may not have processed the sequence operation..
344 * Proceed as if the server received and processed the sequence
345 * operation.
346 */
347 if (res->sr_status == 1)
348 res->sr_status = NFS_OK;
349
350 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
351 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
352 goto out;
353
354 tbl = &clp->cl_session->fc_slot_table;
355 slot = tbl->slots + res->sr_slotid;
356
357 if (res->sr_status == 0) {
358 /* Update the slot's sequence and clientid lease timer */
359 ++slot->seq_nr;
360 timestamp = res->sr_renewal_time;
361 spin_lock(&clp->cl_lock);
362 if (time_before(clp->cl_last_renewal, timestamp))
363 clp->cl_last_renewal = timestamp;
364 spin_unlock(&clp->cl_lock);
365 return;
366 }
367out:
368 /* The session may be reset by one of the error handlers. */
369 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
370 nfs41_sequence_free_slot(clp, res);
371}
372
510b8175
BH		 373/*
374 * nfs4_find_slot - efficiently look for a free slot
375 *
376 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
377 * If found, we mark the slot as used, update the highest_used_slotid,
378 * and respectively set up the sequence operation args.
379 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 380 *
381 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 382 */
383static u8
384nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
385{
386 int slotid;
387 u8 ret_id = NFS4_MAX_SLOT_TABLE;
388 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
389
510b8175
BH		 390 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
391 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
392 tbl->max_slots);
393 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
394 if (slotid >= tbl->max_slots)
395 goto out;
396 __set_bit(slotid, tbl->used_slots);
397 if (slotid > tbl->highest_used_slotid)
398 tbl->highest_used_slotid = slotid;
399 ret_id = slotid;
400out:
401 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
402 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 403 return ret_id;
404}
405
ce5039c1
AA		 406static int nfs41_setup_sequence(struct nfs4_session *session,
407 struct nfs4_sequence_args *args,
408 struct nfs4_sequence_res *res,
409 int cache_reply,
410 struct rpc_task *task)
411{
fbcd4abc
AA		 412 struct nfs4_slot *slot;
413 struct nfs4_slot_table *tbl;
414 u8 slotid;
415
416 dprintk("--> %s\n", __func__);
ce5039c1
AA		 417 /* slot already allocated? */
418 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
419 return 0;
420
421 memset(res, 0, sizeof(*res));
422 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 423 tbl = &session->fc_slot_table;
424
425 spin_lock(&tbl->slot_tbl_lock);
426 slotid = nfs4_find_slot(tbl, task);
427 if (slotid == NFS4_MAX_SLOT_TABLE) {
428 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
429 spin_unlock(&tbl->slot_tbl_lock);
430 dprintk("<-- %s: no free slots\n", __func__);
431 return -EAGAIN;
432 }
433 spin_unlock(&tbl->slot_tbl_lock);
434
435 slot = tbl->slots + slotid;
436 args->sa_slotid = slotid;
437 args->sa_cache_this = cache_reply;
438
439 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
440
441 res->sr_slotid = slotid;
442 res->sr_renewal_time = jiffies;
443 /*
444 * sr_status is only set in decode_sequence, and so will remain
445 * set to 1 if an rpc level failure occurs.
446 */
447 res->sr_status = 1;
ce5039c1
AA		 448 return 0;
449}
450
451int nfs4_setup_sequence(struct nfs_client *clp,
452 struct nfs4_sequence_args *args,
453 struct nfs4_sequence_res *res,
454 int cache_reply,
455 struct rpc_task *task)
456{
457 int ret = 0;
458
459 dprintk("--> %s clp %p session %p sr_slotid %d\n",
460 __func__, clp, clp->cl_session, res->sr_slotid);
461
462 if (!nfs4_has_session(clp))
463 goto out;
464 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
465 task);
466 if (ret != -EAGAIN) {
467 /* terminate rpc task */
468 task->tk_status = ret;
469 task->tk_action = NULL;
470 }
471out:
472 dprintk("<-- %s status=%d\n", __func__, ret);
473 return ret;
474}
475
476struct nfs41_call_sync_data {
477 struct nfs_client *clp;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480 int cache_reply;
481};
482
483static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
484{
485 struct nfs41_call_sync_data *data = calldata;
486
487 dprintk("--> %s data->clp->cl_session %p\n", __func__,
488 data->clp->cl_session);
489 if (nfs4_setup_sequence(data->clp, data->seq_args,
490 data->seq_res, data->cache_reply, task))
491 return;
492 rpc_call_start(task);
493}
494
69ab40c4
AA		 495static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
496{
497 struct nfs41_call_sync_data *data = calldata;
498
499 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
500 nfs41_sequence_free_slot(data->clp, data->seq_res);
501}
502
ce5039c1
AA		 503struct rpc_call_ops nfs41_call_sync_ops = {
504 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 505 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 506};
507
508static int nfs4_call_sync_sequence(struct nfs_client *clp,
509 struct rpc_clnt *clnt,
510 struct rpc_message *msg,
511 struct nfs4_sequence_args *args,
512 struct nfs4_sequence_res *res,
513 int cache_reply)
514{
515 int ret;
516 struct rpc_task *task;
517 struct nfs41_call_sync_data data = {
518 .clp = clp,
519 .seq_args = args,
520 .seq_res = res,
521 .cache_reply = cache_reply,
522 };
523 struct rpc_task_setup task_setup = {
524 .rpc_client = clnt,
525 .rpc_message = msg,
526 .callback_ops = &nfs41_call_sync_ops,
527 .callback_data = &data
528 };
529
530 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
531 task = rpc_run_task(&task_setup);
532 if (IS_ERR(task))
533 ret = PTR_ERR(task);
534 else {
535 ret = task->tk_status;
536 rpc_put_task(task);
537 }
538 return ret;
539}
540
cccef3b9
AA		 541int _nfs4_call_sync_session(struct nfs_server *server,
542 struct rpc_message *msg,
543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
545 int cache_reply)
546{
ce5039c1
AA		 547 return nfs4_call_sync_sequence(server->nfs_client, server->client,
548 msg, args, res, cache_reply);
cccef3b9
AA		 549}
550
551#endif /* CONFIG_NFS_V4_1 */
552
553int _nfs4_call_sync(struct nfs_server *server,
554 struct rpc_message *msg,
555 struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res,
557 int cache_reply)
558{
f3752975 559 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 560 return rpc_call_sync(server->client, msg, 0);
561}
562
563#define nfs4_call_sync(server, msg, args, res, cache_reply) \
564 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
565 &(res)->seq_res, (cache_reply))
566
b0df806c
AA		 567static void nfs4_sequence_done(const struct nfs_server *server,
568 struct nfs4_sequence_res *res, int rpc_status)
569{
570#ifdef CONFIG_NFS_V4_1
571 if (nfs4_has_session(server->nfs_client))
572 nfs41_sequence_done(server->nfs_client, res, rpc_status);
573#endif /* CONFIG_NFS_V4_1 */
574}
575
576/* no restart, therefore free slot here */
577static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
578 struct nfs4_sequence_res *res,
579 int rpc_status)
580{
581 nfs4_sequence_done(server, res, rpc_status);
582 nfs4_sequence_free_slot(server->nfs_client, res);
583}
584
38478b24 585static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 586{
38478b24 587 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 588
38478b24 589 spin_lock(&dir->i_lock);
40d24704
TM		 590 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
591 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 592 nfs_force_lookup_revalidate(dir);
40d24704 593 nfsi->change_attr = cinfo->after;
38478b24 594 spin_unlock(&dir->i_lock);
1da177e4
LT		 595}
596
e56e0b78 597struct nfs4_opendata {
c6d00e63 598 struct kref kref;
e56e0b78
TM		 599 struct nfs_openargs o_arg;
600 struct nfs_openres o_res;
cdd4e68b
TM		 601 struct nfs_open_confirmargs c_arg;
602 struct nfs_open_confirmres c_res;
e56e0b78
TM		 603 struct nfs_fattr f_attr;
604 struct nfs_fattr dir_attr;
ad389da7 605 struct path path;
e56e0b78
TM		 606 struct dentry *dir;
607 struct nfs4_state_owner *owner;
aac00a8d 608 struct nfs4_state *state;
e56e0b78 609 struct iattr attrs;
26e976a8 610 unsigned long timestamp;
3e309914 611 unsigned int rpc_done : 1;
24ac23ab
TM		 612 int rpc_status;
613 int cancelled;
e56e0b78
TM		 614};
615
2ced46c2
TM		 616
617static void nfs4_init_opendata_res(struct nfs4_opendata *p)
618{
619 p->o_res.f_attr = &p->f_attr;
620 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 621 p->o_res.seqid = p->o_arg.seqid;
622 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 623 p->o_res.server = p->o_arg.server;
624 nfs_fattr_init(&p->f_attr);
625 nfs_fattr_init(&p->dir_attr);
626}
627
ad389da7 628static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 629 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 630 const struct iattr *attrs)
631{
ad389da7 632 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 633 struct inode *dir = parent->d_inode;
634 struct nfs_server *server = NFS_SERVER(dir);
635 struct nfs4_opendata *p;
636
637 p = kzalloc(sizeof(*p), GFP_KERNEL);
638 if (p == NULL)
639 goto err;
640 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
641 if (p->o_arg.seqid == NULL)
642 goto err_free;
ad389da7
TM		 643 p->path.mnt = mntget(path->mnt);
644 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 645 p->dir = parent;
646 p->owner = sp;
647 atomic_inc(&sp->so_count);
648 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 649 p->o_arg.open_flags = flags;
650 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 651 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 652 p->o_arg.id = sp->so_owner_id.id;
ad389da7 653 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 654 p->o_arg.server = server;
655 p->o_arg.bitmask = server->attr_bitmask;
656 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 657 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 658 if (flags & O_EXCL) {
659 u32 *s = (u32 *) p->o_arg.u.verifier.data;
660 s[0] = jiffies;
661 s[1] = current->pid;
662 } else if (flags & O_CREAT) {
663 p->o_arg.u.attrs = &p->attrs;
664 memcpy(&p->attrs, attrs, sizeof(p->attrs));
665 }
cdd4e68b
TM		 666 p->c_arg.fh = &p->o_res.fh;
667 p->c_arg.stateid = &p->o_res.stateid;
668 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 669 nfs4_init_opendata_res(p);
c6d00e63 670 kref_init(&p->kref);
e56e0b78
TM		 671 return p;
672err_free:
673 kfree(p);
674err:
675 dput(parent);
676 return NULL;
677}
678
c6d00e63 679static void nfs4_opendata_free(struct kref *kref)
e56e0b78 680{
c6d00e63
TM		 681 struct nfs4_opendata *p = container_of(kref,
682 struct nfs4_opendata, kref);
683
684 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 685 if (p->state != NULL)
686 nfs4_put_open_state(p->state);
c6d00e63
TM		 687 nfs4_put_state_owner(p->owner);
688 dput(p->dir);
31f31db1 689 path_put(&p->path);
c6d00e63
TM		 690 kfree(p);
691}
692
693static void nfs4_opendata_put(struct nfs4_opendata *p)
694{
695 if (p != NULL)
696 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 697}
698
06f814a3
TM		 699static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
700{
06f814a3
TM		 701 int ret;
702
06f814a3 703 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 704 return ret;
705}
706
dc0b027d 707static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 708{
709 int ret = 0;
dc0b027d
TM		 710
711 if (open_mode & O_EXCL)
712 goto out;
713 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 714 case FMODE_READ:
715 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 716 break;
717 case FMODE_WRITE:
718 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 719 break;
720 case FMODE_READ|FMODE_WRITE:
721 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
722 }
dc0b027d 723out:
6ee41268
TM		 724 return ret;
725}
726
dc0b027d 727static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 728{
dc0b027d 729 if ((delegation->type & fmode) != fmode)
aac00a8d 730 return 0;
15c831bf 731 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 732 return 0;
b7391f44 733 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 734 return 1;
735}
736
dc0b027d 737static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 738{
dc0b027d 739 switch (fmode) {
e7616923
TM		 740 case FMODE_WRITE:
741 state->n_wronly++;
742 break;
743 case FMODE_READ:
744 state->n_rdonly++;
745 break;
746 case FMODE_READ|FMODE_WRITE:
747 state->n_rdwr++;
748 }
dc0b027d 749 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 750}
751
dc0b027d 752static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 753{
754 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
755 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
756 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 757 switch (fmode) {
003707c7
TM		 758 case FMODE_READ:
759 set_bit(NFS_O_RDONLY_STATE, &state->flags);
760 break;
761 case FMODE_WRITE:
762 set_bit(NFS_O_WRONLY_STATE, &state->flags);
763 break;
764 case FMODE_READ|FMODE_WRITE:
765 set_bit(NFS_O_RDWR_STATE, &state->flags);
766 }
e7616923
TM		 767}
768
dc0b027d 769static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 770{
8bda4e4c 771 write_seqlock(&state->seqlock);
dc0b027d 772 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 773 write_sequnlock(&state->seqlock);
003707c7
TM		 774}
775
dc0b027d 776static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 777{
8bda4e4c
TM		 778 /*
779 * Protect the call to nfs4_state_set_mode_locked and
780 * serialise the stateid update
781 */
782 write_seqlock(&state->seqlock);
003707c7
TM		 783 if (deleg_stateid != NULL) {
784 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
785 set_bit(NFS_DELEGATED_STATE, &state->flags);
786 }
787 if (open_stateid != NULL)
dc0b027d 788 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 789 write_sequnlock(&state->seqlock);
790 spin_lock(&state->owner->so_lock);
dc0b027d 791 update_open_stateflags(state, fmode);
ec073428 792 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 793}
794
dc0b027d 795static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 796{
797 struct nfs_inode *nfsi = NFS_I(state->inode);
798 struct nfs_delegation *deleg_cur;
799 int ret = 0;
800
dc0b027d 801 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 802
803 rcu_read_lock();
804 deleg_cur = rcu_dereference(nfsi->delegation);
805 if (deleg_cur == NULL)
806 goto no_delegation;
807
808 spin_lock(&deleg_cur->lock);
809 if (nfsi->delegation != deleg_cur ||
dc0b027d 810 (deleg_cur->type & fmode) != fmode)
34310430
TM		 811 goto no_delegation_unlock;
812
813 if (delegation == NULL)
814 delegation = &deleg_cur->stateid;
815 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
816 goto no_delegation_unlock;
817
b7391f44 818 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 819 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 820 ret = 1;
821no_delegation_unlock:
822 spin_unlock(&deleg_cur->lock);
823no_delegation:
824 rcu_read_unlock();
825
826 if (!ret && open_stateid != NULL) {
dc0b027d 827 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 828 ret = 1;
829 }
830
831 return ret;
832}
833
834
dc0b027d 835static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 836{
837 struct nfs_delegation *delegation;
838
839 rcu_read_lock();
840 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 841 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 842 rcu_read_unlock();
843 return;
844 }
845 rcu_read_unlock();
846 nfs_inode_return_delegation(inode);
847}
848
6ee41268 849static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 850{
851 struct nfs4_state *state = opendata->state;
852 struct nfs_inode *nfsi = NFS_I(state->inode);
853 struct nfs_delegation *delegation;
dc0b027d
TM		 854 int open_mode = opendata->o_arg.open_flags & O_EXCL;
855 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 856 nfs4_stateid stateid;
857 int ret = -EAGAIN;
858
aac00a8d 859 for (;;) {
dc0b027d 860 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 861 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 862 if (can_open_cached(state, fmode, open_mode)) {
863 update_open_stateflags(state, fmode);
6ee41268 864 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 865 goto out_return_state;
866 }
867 spin_unlock(&state->owner->so_lock);
868 }
34310430
TM		 869 rcu_read_lock();
870 delegation = rcu_dereference(nfsi->delegation);
871 if (delegation == NULL ||
dc0b027d 872 !can_open_delegated(delegation, fmode)) {
34310430 873 rcu_read_unlock();
aac00a8d 874 break;
34310430 875 }
aac00a8d
TM		 876 /* Save the delegation */
877 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
878 rcu_read_unlock();
af22f94a 879 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 880 if (ret != 0)
881 goto out;
882 ret = -EAGAIN;
34310430
TM		 883
884 /* Try to update the stateid using the delegation */
dc0b027d 885 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 886 goto out_return_state;
aac00a8d 887 }
aac00a8d
TM		 888out:
889 return ERR_PTR(ret);
890out_return_state:
891 atomic_inc(&state->count);
892 return state;
893}
894
24ac23ab
TM		 895static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
896{
897 struct inode *inode;
898 struct nfs4_state *state = NULL;
003707c7 899 struct nfs_delegation *delegation;
1b370bc2 900 int ret;
24ac23ab 901
aac00a8d 902 if (!data->rpc_done) {
6ee41268 903 state = nfs4_try_open_cached(data);
aac00a8d
TM		 904 goto out;
905 }
906
1b370bc2 907 ret = -EAGAIN;
24ac23ab 908 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 909 goto err;
24ac23ab 910 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 911 ret = PTR_ERR(inode);
03f28e3a 912 if (IS_ERR(inode))
1b370bc2
TM		 913 goto err;
914 ret = -ENOMEM;
24ac23ab
TM		 915 state = nfs4_get_open_state(inode, data->owner);
916 if (state == NULL)
1b370bc2 917 goto err_put_inode;
549d6ed5 918 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 919 int delegation_flags = 0;
920
003707c7
TM		 921 rcu_read_lock();
922 delegation = rcu_dereference(NFS_I(inode)->delegation);
923 if (delegation)
924 delegation_flags = delegation->flags;
925 rcu_read_unlock();
15c831bf 926 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 927 nfs_inode_set_delegation(state->inode,
928 data->owner->so_cred,
929 &data->o_res);
930 else
931 nfs_inode_reclaim_delegation(state->inode,
932 data->owner->so_cred,
933 &data->o_res);
934 }
34310430
TM		 935
936 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 937 data->o_arg.fmode);
24ac23ab 938 iput(inode);
aac00a8d 939out:
24ac23ab 940 return state;
1b370bc2
TM		 941err_put_inode:
942 iput(inode);
943err:
944 return ERR_PTR(ret);
24ac23ab
TM		 945}
946
864472e9
TM		 947static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
948{
949 struct nfs_inode *nfsi = NFS_I(state->inode);
950 struct nfs_open_context *ctx;
951
952 spin_lock(&state->inode->i_lock);
953 list_for_each_entry(ctx, &nfsi->open_files, list) {
954 if (ctx->state != state)
955 continue;
956 get_nfs_open_context(ctx);
957 spin_unlock(&state->inode->i_lock);
958 return ctx;
959 }
960 spin_unlock(&state->inode->i_lock);
961 return ERR_PTR(-ENOENT);
962}
963
6f220ed5
TM		 964static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
965{
966 struct nfs4_opendata *opendata;
967
dc0b027d 968 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 969 if (opendata == NULL)
970 return ERR_PTR(-ENOMEM);
971 opendata->state = state;
972 atomic_inc(&state->count);
973 return opendata;
974}
975
dc0b027d 976static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 977{
2ced46c2 978 struct nfs4_state *newstate;
864472e9
TM		 979 int ret;
980
dc0b027d
TM		 981 opendata->o_arg.open_flags = 0;
982 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 983 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
984 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
985 nfs4_init_opendata_res(opendata);
864472e9
TM		 986 ret = _nfs4_proc_open(opendata);
987 if (ret != 0)
988 return ret;
2ced46c2 989 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 990 if (IS_ERR(newstate))
991 return PTR_ERR(newstate);
dc0b027d 992 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 993 *res = newstate;
864472e9
TM		 994 return 0;
995}
996
997static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
998{
864472e9 999 struct nfs4_state *newstate;
864472e9
TM		 1000 int ret;
1001
1002 /* memory barrier prior to reading state->n_* */
2ced46c2 1003 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1004 smp_rmb();
1005 if (state->n_rdwr != 0) {
2ced46c2 1006 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1007 if (ret != 0)
1008 return ret;
2ced46c2
TM		 1009 if (newstate != state)
1010 return -ESTALE;
864472e9
TM		 1011 }
1012 if (state->n_wronly != 0) {
2ced46c2 1013 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1014 if (ret != 0)
1015 return ret;
2ced46c2
TM		 1016 if (newstate != state)
1017 return -ESTALE;
864472e9
TM		 1018 }
1019 if (state->n_rdonly != 0) {
2ced46c2 1020 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1021 if (ret != 0)
1022 return ret;
2ced46c2
TM		 1023 if (newstate != state)
1024 return -ESTALE;
864472e9 1025 }
1ac7e2fd
TM		 1026 /*
1027 * We may have performed cached opens for all three recoveries.
1028 * Check if we need to update the current stateid.
1029 */
1030 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1031 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1032 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1033 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1034 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1035 write_sequnlock(&state->seqlock);
1ac7e2fd 1036 }
864472e9
TM		 1037 return 0;
1038}
1039
1da177e4
LT		 1040/*
1041 * OPEN_RECLAIM:
1042 * reclaim state on the server after a reboot.
1da177e4 1043 */
539cd03a 1044static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1045{
1ac7e2fd 1046 struct nfs_delegation *delegation;
864472e9 1047 struct nfs4_opendata *opendata;
dc0b027d 1048 fmode_t delegation_type = 0;
1da177e4
LT		 1049 int status;
1050
6f220ed5
TM		 1051 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1052 if (IS_ERR(opendata))
1053 return PTR_ERR(opendata);
864472e9
TM		 1054 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1055 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1056 rcu_read_lock();
1057 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1058 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1059 delegation_type = delegation->type;
1ac7e2fd 1060 rcu_read_unlock();
864472e9
TM		 1061 opendata->o_arg.u.delegation_type = delegation_type;
1062 status = nfs4_open_recover(opendata, state);
c6d00e63 1063 nfs4_opendata_put(opendata);
1da177e4
LT		 1064 return status;
1065}
1066
539cd03a 1067static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1068{
1069 struct nfs_server *server = NFS_SERVER(state->inode);
1070 struct nfs4_exception exception = { };
1071 int err;
1072 do {
539cd03a 1073 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1074 if (err != -NFS4ERR_DELAY)
1075 break;
1076 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1077 } while (exception.retry);
1078 return err;
1079}
1080
864472e9
TM		 1081static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1082{
1083 struct nfs_open_context *ctx;
1084 int ret;
1085
1086 ctx = nfs4_state_find_open_context(state);
1087 if (IS_ERR(ctx))
1088 return PTR_ERR(ctx);
539cd03a 1089 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1090 put_nfs_open_context(ctx);
1091 return ret;
1092}
1093
13437e12 1094static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1095{
e56e0b78 1096 struct nfs4_opendata *opendata;
864472e9 1097 int ret;
1da177e4 1098
6f220ed5
TM		 1099 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1100 if (IS_ERR(opendata))
1101 return PTR_ERR(opendata);
e56e0b78 1102 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1103 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1104 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1105 ret = nfs4_open_recover(opendata, state);
c6d00e63 1106 nfs4_opendata_put(opendata);
864472e9 1107 return ret;
1da177e4
LT		 1108}
1109
13437e12 1110int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1111{
1112 struct nfs4_exception exception = { };
539cd03a 1113 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1114 int err;
1115 do {
13437e12 1116 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1117 switch (err) {
1118 case 0:
1119 return err;
1120 case -NFS4ERR_STALE_CLIENTID:
1121 case -NFS4ERR_STALE_STATEID:
1122 case -NFS4ERR_EXPIRED:
1123 /* Don't recall a delegation if it was lost */
7539bbab 1124 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1125 return err;
1126 }
1127 err = nfs4_handle_exception(server, err, &exception);
1128 } while (exception.retry);
1129 return err;
1130}
1131
cdd4e68b
TM		 1132static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1133{
1134 struct nfs4_opendata *data = calldata;
1135
1136 data->rpc_status = task->tk_status;
1137 if (RPC_ASSASSINATED(task))
1138 return;
26e976a8 1139 if (data->rpc_status == 0) {
cdd4e68b
TM		 1140 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1141 sizeof(data->o_res.stateid.data));
bb22629e 1142 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1143 renew_lease(data->o_res.server, data->timestamp);
3e309914 1144 data->rpc_done = 1;
26e976a8 1145 }
cdd4e68b
TM		 1146}
1147
1148static void nfs4_open_confirm_release(void *calldata)
1149{
1150 struct nfs4_opendata *data = calldata;
1151 struct nfs4_state *state = NULL;
1152
1153 /* If this request hasn't been cancelled, do nothing */
1154 if (data->cancelled == 0)
1155 goto out_free;
1156 /* In case of error, no cleanup! */
3e309914 1157 if (!data->rpc_done)
cdd4e68b 1158 goto out_free;
cdd4e68b 1159 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1160 if (!IS_ERR(state))
dc0b027d 1161 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1162out_free:
c6d00e63 1163 nfs4_opendata_put(data);
cdd4e68b
TM		 1164}
1165
1166static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1167 .rpc_call_done = nfs4_open_confirm_done,
1168 .rpc_release = nfs4_open_confirm_release,
1169};
1170
1171/*
1172 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1173 */
1174static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1175{
1176 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1177 struct rpc_task *task;
5138fde0
TM		 1178 struct rpc_message msg = {
1179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1180 .rpc_argp = &data->c_arg,
1181 .rpc_resp = &data->c_res,
1182 .rpc_cred = data->owner->so_cred,
1183 };
c970aa85
TM		 1184 struct rpc_task_setup task_setup_data = {
1185 .rpc_client = server->client,
5138fde0 1186 .rpc_message = &msg,
c970aa85
TM		 1187 .callback_ops = &nfs4_open_confirm_ops,
1188 .callback_data = data,
101070ca 1189 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1190 .flags = RPC_TASK_ASYNC,
1191 };
1da177e4
LT		 1192 int status;
1193
c6d00e63 1194 kref_get(&data->kref);
3e309914
TM		 1195 data->rpc_done = 0;
1196 data->rpc_status = 0;
5138fde0 1197 data->timestamp = jiffies;
c970aa85 1198 task = rpc_run_task(&task_setup_data);
7a1218a2 1199 if (IS_ERR(task))
cdd4e68b 1200 return PTR_ERR(task);
cdd4e68b
TM		 1201 status = nfs4_wait_for_completion_rpc_task(task);
1202 if (status != 0) {
1203 data->cancelled = 1;
1204 smp_wmb();
1205 } else
1206 status = data->rpc_status;
e6b3c4db 1207 rpc_put_task(task);
1da177e4
LT		 1208 return status;
1209}
1210
24ac23ab 1211static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1212{
24ac23ab
TM		 1213 struct nfs4_opendata *data = calldata;
1214 struct nfs4_state_owner *sp = data->owner;
5138fde0 1215
24ac23ab
TM		 1216 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1217 return;
aac00a8d
TM		 1218 /*
1219 * Check if we still need to send an OPEN call, or if we can use
1220 * a delegation instead.
1221 */
1222 if (data->state != NULL) {
1223 struct nfs_delegation *delegation;
1224
dc0b027d 1225 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1226 goto out_no_action;
aac00a8d
TM		 1227 rcu_read_lock();
1228 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1229 if (delegation != NULL &&
15c831bf 1230 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1231 rcu_read_unlock();
6ee41268 1232 goto out_no_action;
aac00a8d
TM		 1233 }
1234 rcu_read_unlock();
1235 }
24ac23ab 1236 /* Update sequence id. */
9f958ab8 1237 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1238 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1239 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1240 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1241 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1242 }
26e976a8 1243 data->timestamp = jiffies;
d898528c
AA		 1244 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1245 &data->o_arg.seq_args,
1246 &data->o_res.seq_res, 1, task))
1247 return;
5138fde0 1248 rpc_call_start(task);
6ee41268
TM		 1249 return;
1250out_no_action:
1251 task->tk_action = NULL;
1252
24ac23ab 1253}
1da177e4 1254
24ac23ab
TM		 1255static void nfs4_open_done(struct rpc_task *task, void *calldata)
1256{
1257 struct nfs4_opendata *data = calldata;
1da177e4 1258
24ac23ab 1259 data->rpc_status = task->tk_status;
d898528c
AA		 1260
1261 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1262 task->tk_status);
1263
24ac23ab
TM		 1264 if (RPC_ASSASSINATED(task))
1265 return;
1266 if (task->tk_status == 0) {
1267 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1268 case S_IFREG:
1269 break;
1270 case S_IFLNK:
24ac23ab 1271 data->rpc_status = -ELOOP;
6f926b5b
TM		 1272 break;
1273 case S_IFDIR:
24ac23ab 1274 data->rpc_status = -EISDIR;
6f926b5b
TM		 1275 break;
1276 default:
24ac23ab 1277 data->rpc_status = -ENOTDIR;
6f926b5b 1278 }
26e976a8 1279 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1280 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1281 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1282 }
3e309914 1283 data->rpc_done = 1;
24ac23ab 1284}
6f926b5b 1285
24ac23ab
TM		 1286static void nfs4_open_release(void *calldata)
1287{
1288 struct nfs4_opendata *data = calldata;
1289 struct nfs4_state *state = NULL;
1290
1291 /* If this request hasn't been cancelled, do nothing */
1292 if (data->cancelled == 0)
1293 goto out_free;
1294 /* In case of error, no cleanup! */
3e309914 1295 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1296 goto out_free;
1297 /* In case we need an open_confirm, no cleanup! */
1298 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1299 goto out_free;
24ac23ab 1300 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1301 if (!IS_ERR(state))
dc0b027d 1302 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1303out_free:
c6d00e63 1304 nfs4_opendata_put(data);
24ac23ab
TM		 1305}
1306
1307static const struct rpc_call_ops nfs4_open_ops = {
1308 .rpc_call_prepare = nfs4_open_prepare,
1309 .rpc_call_done = nfs4_open_done,
1310 .rpc_release = nfs4_open_release,
1311};
1312
1313/*
1314 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1315 */
1316static int _nfs4_proc_open(struct nfs4_opendata *data)
1317{
1318 struct inode *dir = data->dir->d_inode;
1319 struct nfs_server *server = NFS_SERVER(dir);
1320 struct nfs_openargs *o_arg = &data->o_arg;
1321 struct nfs_openres *o_res = &data->o_res;
1322 struct rpc_task *task;
5138fde0
TM		 1323 struct rpc_message msg = {
1324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1325 .rpc_argp = o_arg,
1326 .rpc_resp = o_res,
1327 .rpc_cred = data->owner->so_cred,
1328 };
c970aa85
TM		 1329 struct rpc_task_setup task_setup_data = {
1330 .rpc_client = server->client,
5138fde0 1331 .rpc_message = &msg,
c970aa85
TM		 1332 .callback_ops = &nfs4_open_ops,
1333 .callback_data = data,
101070ca 1334 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1335 .flags = RPC_TASK_ASYNC,
1336 };
24ac23ab
TM		 1337 int status;
1338
c6d00e63 1339 kref_get(&data->kref);
3e309914
TM		 1340 data->rpc_done = 0;
1341 data->rpc_status = 0;
2ced46c2 1342 data->cancelled = 0;
c970aa85 1343 task = rpc_run_task(&task_setup_data);
7a1218a2 1344 if (IS_ERR(task))
24ac23ab 1345 return PTR_ERR(task);
24ac23ab
TM		 1346 status = nfs4_wait_for_completion_rpc_task(task);
1347 if (status != 0) {
1348 data->cancelled = 1;
1349 smp_wmb();
1350 } else
1351 status = data->rpc_status;
e6b3c4db 1352 rpc_put_task(task);
3e309914 1353 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1354 return status;
1355
9936781d
TM		 1356 if (o_res->fh.size == 0)
1357 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1358
56ae19f3
TM		 1359 if (o_arg->open_flags & O_CREAT) {
1360 update_changeattr(dir, &o_res->cinfo);
1361 nfs_post_op_update_inode(dir, o_res->dir_attr);
1362 } else
1363 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1364 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1365 status = _nfs4_proc_open_confirm(data);
1da177e4 1366 if (status != 0)
24ac23ab 1367 return status;
1da177e4
LT		 1368 }
1369 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1370 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1371 return 0;
1da177e4
LT		 1372}
1373
10afec90 1374static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1375{
7539bbab 1376 struct nfs_client *clp = server->nfs_client;
6b30954e 1377 int ret;
58d9714a 1378
6b30954e 1379 for (;;) {
65de872e 1380 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1381 if (ret != 0)
1382 return ret;
e598d843
TM		 1383 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1384 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1385 break;
58d9714a 1386 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1387 }
1388 return 0;
58d9714a
TM		 1389}
1390
1da177e4
LT		 1391/*
1392 * OPEN_EXPIRED:
1393 * reclaim state on the server after a network partition.
1394 * Assumes caller holds the appropriate lock
1395 */
539cd03a 1396static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1397{
e56e0b78 1398 struct nfs4_opendata *opendata;
864472e9 1399 int ret;
1da177e4 1400
6f220ed5
TM		 1401 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1402 if (IS_ERR(opendata))
1403 return PTR_ERR(opendata);
864472e9 1404 ret = nfs4_open_recover(opendata, state);
35d05778 1405 if (ret == -ESTALE)
539cd03a 1406 d_drop(ctx->path.dentry);
c6d00e63 1407 nfs4_opendata_put(opendata);
864472e9 1408 return ret;
1da177e4
LT		 1409}
1410
539cd03a 1411static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1412{
539cd03a 1413 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1414 struct nfs4_exception exception = { };
1415 int err;
1416
1417 do {
539cd03a 1418 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1419 if (err != -NFS4ERR_DELAY)
1420 break;
1421 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1422 } while (exception.retry);
1423 return err;
1424}
1425
1da177e4
LT		 1426static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1427{
1da177e4 1428 struct nfs_open_context *ctx;
864472e9 1429 int ret;
1da177e4 1430
864472e9
TM		 1431 ctx = nfs4_state_find_open_context(state);
1432 if (IS_ERR(ctx))
1433 return PTR_ERR(ctx);
539cd03a 1434 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1435 put_nfs_open_context(ctx);
1436 return ret;
1da177e4
LT		 1437}
1438
aa53ed54
JL		 1439/*
1440 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1441 * fields corresponding to attributes that were used to store the verifier.
1442 * Make sure we clobber those fields in the later setattr call
1443 */
1444static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1445{
1446 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1447 !(sattr->ia_valid & ATTR_ATIME_SET))
1448 sattr->ia_valid |= ATTR_ATIME;
1449
1450 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1451 !(sattr->ia_valid & ATTR_MTIME_SET))
1452 sattr->ia_valid |= ATTR_MTIME;
1453}
1454
1da177e4 1455/*
24ac23ab 1456 * Returns a referenced nfs4_state
1da177e4 1457 */
dc0b027d 1458static 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		 1459{
1460 struct nfs4_state_owner *sp;
1461 struct nfs4_state *state = NULL;
1462 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1463 struct nfs4_opendata *opendata;
aac00a8d 1464 int status;
1da177e4
LT		 1465
1466 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1467 status = -ENOMEM;
1468 if (!(sp = nfs4_get_state_owner(server, cred))) {
1469 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1470 goto out_err;
1471 }
58d9714a
TM		 1472 status = nfs4_recover_expired_lease(server);
1473 if (status != 0)
b4454fe1 1474 goto err_put_state_owner;
aac00a8d 1475 if (path->dentry->d_inode != NULL)
dc0b027d 1476 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1477 status = -ENOMEM;
dc0b027d 1478 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1479 if (opendata == NULL)
95d35cb4 1480 goto err_put_state_owner;
1da177e4 1481
aac00a8d
TM		 1482 if (path->dentry->d_inode != NULL)
1483 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1484
24ac23ab 1485 status = _nfs4_proc_open(opendata);
1da177e4 1486 if (status != 0)
c6d00e63 1487 goto err_opendata_put;
1da177e4 1488
aa53ed54
JL		 1489 if (opendata->o_arg.open_flags & O_EXCL)
1490 nfs4_exclusive_attrset(opendata, sattr);
1491
24ac23ab 1492 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1493 status = PTR_ERR(state);
1494 if (IS_ERR(state))
c6d00e63 1495 goto err_opendata_put;
c6d00e63 1496 nfs4_opendata_put(opendata);
1da177e4 1497 nfs4_put_state_owner(sp);
1da177e4
LT		 1498 *res = state;
1499 return 0;
c6d00e63
TM		 1500err_opendata_put:
1501 nfs4_opendata_put(opendata);
e56e0b78
TM		 1502err_put_state_owner:
1503 nfs4_put_state_owner(sp);
1da177e4 1504out_err:
1da177e4
LT		 1505 *res = NULL;
1506 return status;
1507}
1508
1509
dc0b027d 1510static 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		 1511{
1512 struct nfs4_exception exception = { };
1513 struct nfs4_state *res;
1514 int status;
1515
1516 do {
dc0b027d 1517 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1518 if (status == 0)
1519 break;
1520 /* NOTE: BAD_SEQID means the server and client disagree about the
1521 * book-keeping w.r.t. state-changing operations
1522 * (OPEN/CLOSE/LOCK/LOCKU...)
1523 * It is actually a sign of a bug on the client or on the server.
1524 *
1525 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1526 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1527 * have unhashed the old state_owner for us, and that we can
1528 * therefore safely retry using a new one. We should still warn
1529 * the user though...
1530 */
1531 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1532 printk(KERN_WARNING "NFS: v4 server %s "
1533 " returned a bad sequence-id error!\n",
1534 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1535 exception.retry = 1;
1536 continue;
1537 }
550f5747
TM		 1538 /*
1539 * BAD_STATEID on OPEN means that the server cancelled our
1540 * state before it received the OPEN_CONFIRM.
1541 * Recover by retrying the request as per the discussion
1542 * on Page 181 of RFC3530.
1543 */
1544 if (status == -NFS4ERR_BAD_STATEID) {
1545 exception.retry = 1;
1546 continue;
1547 }
aac00a8d
TM		 1548 if (status == -EAGAIN) {
1549 /* We must have found a delegation */
1550 exception.retry = 1;
1551 continue;
1552 }
1da177e4
LT		 1553 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1554 status, &exception));
1555 } while (exception.retry);
1556 return res;
1557}
1558
659bfcd6
TM		 1559static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1560 struct nfs_fattr *fattr, struct iattr *sattr,
1561 struct nfs4_state *state)
1da177e4 1562{
3e4f6290 1563 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1564 struct nfs_setattrargs arg = {
3e4f6290 1565 .fh = NFS_FH(inode),
1da177e4
LT		 1566 .iap = sattr,
1567 .server = server,
1568 .bitmask = server->attr_bitmask,
1569 };
1570 struct nfs_setattrres res = {
1571 .fattr = fattr,
1572 .server = server,
1573 };
1574 struct rpc_message msg = {
659bfcd6
TM		 1575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1576 .rpc_argp = &arg,
1577 .rpc_resp = &res,
1578 .rpc_cred = cred,
1da177e4 1579 };
26e976a8 1580 unsigned long timestamp = jiffies;
65e4308d 1581 int status;
1da177e4 1582
0e574af1 1583 nfs_fattr_init(fattr);
1da177e4 1584
3e4f6290
TM		 1585 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1586 /* Use that stateid */
1587 } else if (state != NULL) {
08e9eac4
TM		 1588 nfs4_copy_stateid(&arg.stateid, state, current->files);
1589 } else
1da177e4
LT		 1590 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1591
cccef3b9 1592 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1593 if (status == 0 && state != NULL)
1594 renew_lease(server, timestamp);
65e4308d 1595 return status;
1da177e4
LT		 1596}
1597
659bfcd6
TM		 1598static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1599 struct nfs_fattr *fattr, struct iattr *sattr,
1600 struct nfs4_state *state)
1da177e4 1601{
3e4f6290 1602 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1603 struct nfs4_exception exception = { };
1604 int err;
1605 do {
1606 err = nfs4_handle_exception(server,
659bfcd6 1607 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1608 &exception);
1609 } while (exception.retry);
1610 return err;
1611}
1612
1613struct nfs4_closedata {
4a35bd41 1614 struct path path;
1da177e4
LT		 1615 struct inode *inode;
1616 struct nfs4_state *state;
1617 struct nfs_closeargs arg;
1618 struct nfs_closeres res;
516a6af6 1619 struct nfs_fattr fattr;
26e976a8 1620 unsigned long timestamp;
1da177e4
LT		 1621};
1622
963d8fe5 1623static void nfs4_free_closedata(void *data)
9512135d 1624{
963d8fe5
TM		 1625 struct nfs4_closedata *calldata = data;
1626 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1627
1628 nfs4_put_open_state(calldata->state);
1629 nfs_free_seqid(calldata->arg.seqid);
9512135d 1630 nfs4_put_state_owner(sp);
31f31db1 1631 path_put(&calldata->path);
9512135d
TM		 1632 kfree(calldata);
1633}
1634
963d8fe5 1635static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1636{
963d8fe5 1637 struct nfs4_closedata *calldata = data;
1da177e4 1638 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1639 struct nfs_server *server = NFS_SERVER(calldata->inode);
1640
19ddab06 1641 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1642 if (RPC_ASSASSINATED(task))
1643 return;
1da177e4
LT		 1644 /* hmm. we are done with the inode, and in the process of freeing
1645 * the state_owner. we keep this around to process errors
1646 */
1da177e4
LT		 1647 switch (task->tk_status) {
1648 case 0:
45328c35 1649 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1650 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1651 break;
1652 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1653 case -NFS4ERR_OLD_STATEID:
1654 case -NFS4ERR_BAD_STATEID:
1da177e4 1655 case -NFS4ERR_EXPIRED:
dc0b027d 1656 if (calldata->arg.fmode == 0)
9e33bed5 1657 break;
1da177e4 1658 default:
9e33bed5 1659 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1660 rpc_restart_call(task);
1661 return;
1662 }
1663 }
19ddab06 1664 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1665 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1666}
1667
4ce70ada 1668static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1669{
4ce70ada 1670 struct nfs4_closedata *calldata = data;
9512135d 1671 struct nfs4_state *state = calldata->state;
003707c7 1672 int clear_rd, clear_wr, clear_rdwr;
9512135d 1673
963d8fe5 1674 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1675 return;
003707c7 1676
003707c7 1677 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1678 spin_lock(&state->owner->so_lock);
003707c7 1679 /* Calculate the change in open mode */
e7616923 1680 if (state->n_rdwr == 0) {
003707c7 1681 if (state->n_rdonly == 0) {
003707c7
TM		 1682 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1683 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1684 }
1685 if (state->n_wronly == 0) {
003707c7
TM		 1686 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1687 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1688 }
e7616923 1689 }
4cecb76f 1690 spin_unlock(&state->owner->so_lock);
003707c7 1691 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1692 /* Note: exit _without_ calling nfs4_close_done */
1693 task->tk_action = NULL;
9512135d
TM		 1694 return;
1695 }
516a6af6 1696 nfs_fattr_init(calldata->res.fattr);
45328c35 1697 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1698 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1699 calldata->arg.fmode = FMODE_READ;
45328c35 1700 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1701 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1702 calldata->arg.fmode = FMODE_WRITE;
45328c35 1703 }
26e976a8 1704 calldata->timestamp = jiffies;
19ddab06
AA		 1705 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1706 &calldata->arg.seq_args, &calldata->res.seq_res,
1707 1, task))
1708 return;
5138fde0 1709 rpc_call_start(task);
1da177e4
LT		 1710}
1711
963d8fe5 1712static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1713 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1714 .rpc_call_done = nfs4_close_done,
1715 .rpc_release = nfs4_free_closedata,
1716};
1717
1da177e4
LT		 1718/*
1719 * It is possible for data to be read/written from a mem-mapped file
1720 * after the sys_close call (which hits the vfs layer as a flush).
1721 * This means that we can't safely call nfsv4 close on a file until
1722 * the inode is cleared. This in turn means that we are not good
1723 * NFSv4 citizens - we do not indicate to the server to update the file's
1724 * share state even when we are done with one of the three share
1725 * stateid's in the inode.
1726 *
1727 * NOTE: Caller must be holding the sp->so_owner semaphore!
1728 */
a49c3c77 1729int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1730{
4a35bd41 1731 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1732 struct nfs4_closedata *calldata;
b39e625b
TM		 1733 struct nfs4_state_owner *sp = state->owner;
1734 struct rpc_task *task;
5138fde0
TM		 1735 struct rpc_message msg = {
1736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1737 .rpc_cred = state->owner->so_cred,
1738 };
c970aa85
TM		 1739 struct rpc_task_setup task_setup_data = {
1740 .rpc_client = server->client,
5138fde0 1741 .rpc_message = &msg,
c970aa85 1742 .callback_ops = &nfs4_close_ops,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
9512135d 1746 int status = -ENOMEM;
1da177e4 1747
19ddab06 1748 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1749 if (calldata == NULL)
9512135d 1750 goto out;
4a35bd41 1751 calldata->inode = state->inode;
1da177e4 1752 calldata->state = state;
4a35bd41 1753 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1754 calldata->arg.stateid = &state->open_stateid;
1da177e4 1755 /* Serialization for the sequence id */
cee54fc9 1756 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1757 if (calldata->arg.seqid == NULL)
1758 goto out_free_calldata;
dc0b027d 1759 calldata->arg.fmode = 0;
a65318bf 1760 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1761 calldata->res.fattr = &calldata->fattr;
c1d51931 1762 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1763 calldata->res.server = server;
5f7dbd5c 1764 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1765 calldata->path.mnt = mntget(path->mnt);
1766 calldata->path.dentry = dget(path->dentry);
9512135d 1767
5138fde0
TM		 1768 msg.rpc_argp = &calldata->arg,
1769 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1770 task_setup_data.callback_data = calldata;
1771 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1772 if (IS_ERR(task))
1773 return PTR_ERR(task);
a49c3c77
TM		 1774 status = 0;
1775 if (wait)
1776 status = rpc_wait_for_completion_task(task);
b39e625b 1777 rpc_put_task(task);
a49c3c77 1778 return status;
9512135d
TM		 1779out_free_calldata:
1780 kfree(calldata);
1781out:
b39e625b
TM		 1782 nfs4_put_open_state(state);
1783 nfs4_put_state_owner(sp);
9512135d 1784 return status;
1da177e4
LT		 1785}
1786
dc0b027d 1787static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1788{
1789 struct file *filp;
1b45c46c 1790 int ret;
02a913a7 1791
1b45c46c 1792 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1793 if (fmode & FMODE_EXEC) {
af22f94a 1794 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1795 state->owner->so_cred,
1796 nd->intent.open.flags);
1797 if (ret < 0)
1798 goto out_close;
1799 }
4a35bd41 1800 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1801 if (!IS_ERR(filp)) {
1802 struct nfs_open_context *ctx;
cd3758e3 1803 ctx = nfs_file_open_context(filp);
02a913a7 1804 ctx->state = state;
95cf959b
TM		 1805 return 0;
1806 }
1b45c46c
TM		 1807 ret = PTR_ERR(filp);
1808out_close:
dc0b027d 1809 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1810 return ret;
02a913a7
TM		 1811}
1812
1813struct dentry *
1da177e4
LT		 1814nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1815{
ad389da7 1816 struct path path = {
4ac91378 1817 .mnt = nd->path.mnt,
ad389da7
TM		 1818 .dentry = dentry,
1819 };
4ac91378 1820 struct dentry *parent;
1da177e4
LT		 1821 struct iattr attr;
1822 struct rpc_cred *cred;
1823 struct nfs4_state *state;
02a913a7 1824 struct dentry *res;
dc0b027d 1825 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1826
1827 if (nd->flags & LOOKUP_CREATE) {
1828 attr.ia_mode = nd->intent.open.create_mode;
1829 attr.ia_valid = ATTR_MODE;
1830 if (!IS_POSIXACL(dir))
ce3b0f8d 1831 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1832 } else {
1833 attr.ia_valid = 0;
1834 BUG_ON(nd->intent.open.flags & O_CREAT);
1835 }
1836
98a8e323 1837 cred = rpc_lookup_cred();
1da177e4 1838 if (IS_ERR(cred))
02a913a7 1839 return (struct dentry *)cred;
565277f6
TM		 1840 parent = dentry->d_parent;
1841 /* Protect against concurrent sillydeletes */
1842 nfs_block_sillyrename(parent);
dc0b027d 1843 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1844 put_rpccred(cred);
02a913a7 1845 if (IS_ERR(state)) {
d75340cc 1846 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1847 d_add(dentry, NULL);
d75340cc
TM		 1848 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1849 }
565277f6 1850 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1851 return (struct dentry *)state;
1852 }
24ac23ab 1853 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1854 if (res != NULL)
deee9369 1855 path.dentry = res;
d75340cc 1856 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1857 nfs_unblock_sillyrename(parent);
dc0b027d 1858 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1859 return res;
1da177e4
LT		 1860}
1861
1862int
02a913a7 1863nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1864{
ad389da7 1865 struct path path = {
4ac91378 1866 .mnt = nd->path.mnt,
ad389da7
TM		 1867 .dentry = dentry,
1868 };
1da177e4
LT		 1869 struct rpc_cred *cred;
1870 struct nfs4_state *state;
dc0b027d 1871 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1872
98a8e323 1873 cred = rpc_lookup_cred();
1da177e4
LT		 1874 if (IS_ERR(cred))
1875 return PTR_ERR(cred);
dc0b027d 1876 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1877 put_rpccred(cred);
02a913a7
TM		 1878 if (IS_ERR(state)) {
1879 switch (PTR_ERR(state)) {
1880 case -EPERM:
1881 case -EACCES:
1882 case -EDQUOT:
1883 case -ENOSPC:
1884 case -EROFS:
1885 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1886 return 1;
b87c0adf
CL		 1887 default:
1888 goto out_drop;
02a913a7 1889 }
02a913a7 1890 }
24ac23ab 1891 if (state->inode == dentry->d_inode) {
d75340cc 1892 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1893 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1894 return 1;
1895 }
dc0b027d 1896 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1897out_drop:
1898 d_drop(dentry);
1da177e4
LT		 1899 return 0;
1900}
1901
7fe5c398
TM		 1902void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1903{
1904 if (ctx->state == NULL)
1905 return;
1906 if (is_sync)
1907 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1908 else
1909 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1910}
1da177e4
LT		 1911
1912static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1913{
43652ad5
BH		 1914 struct nfs4_server_caps_arg args = {
1915 .fhandle = fhandle,
1916 };
1da177e4
LT		 1917 struct nfs4_server_caps_res res = {};
1918 struct rpc_message msg = {
1919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1920 .rpc_argp = &args,
1da177e4
LT		 1921 .rpc_resp = &res,
1922 };
1923 int status;
1924
cccef3b9 1925 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1926 if (status == 0) {
1927 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1928 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1929 server->caps |= NFS_CAP_ACLS;
1930 if (res.has_links != 0)
1931 server->caps |= NFS_CAP_HARDLINKS;
1932 if (res.has_symlinks != 0)
1933 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1934 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1935 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1936 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1937 server->acl_bitmask = res.acl_bitmask;
1938 }
cccef3b9 1939
1da177e4
LT		 1940 return status;
1941}
1942
55a97593 1943int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1944{
1945 struct nfs4_exception exception = { };
1946 int err;
1947 do {
1948 err = nfs4_handle_exception(server,
1949 _nfs4_server_capabilities(server, fhandle),
1950 &exception);
1951 } while (exception.retry);
1952 return err;
1953}
1954
1955static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1956 struct nfs_fsinfo *info)
1957{
1da177e4
LT		 1958 struct nfs4_lookup_root_arg args = {
1959 .bitmask = nfs4_fattr_bitmap,
1960 };
1961 struct nfs4_lookup_res res = {
1962 .server = server,
0e574af1 1963 .fattr = info->fattr,
1da177e4
LT		 1964 .fh = fhandle,
1965 };
1966 struct rpc_message msg = {
1967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1968 .rpc_argp = &args,
1969 .rpc_resp = &res,
1970 };
0e574af1 1971 nfs_fattr_init(info->fattr);
cccef3b9 1972 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1973}
1974
1975static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1976 struct nfs_fsinfo *info)
1977{
1978 struct nfs4_exception exception = { };
1979 int err;
1980 do {
1981 err = nfs4_handle_exception(server,
1982 _nfs4_lookup_root(server, fhandle, info),
1983 &exception);
1984 } while (exception.retry);
1985 return err;
1986}
1987
54ceac45
DH		 1988/*
1989 * get the file handle for the "/" directory on the server
1990 */
1da177e4 1991static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1992 struct nfs_fsinfo *info)
1da177e4 1993{
1da177e4
LT		 1994 int status;
1995
1da177e4 1996 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1997 if (status == 0)
1998 status = nfs4_server_capabilities(server, fhandle);
1999 if (status == 0)
2000 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2001 return nfs4_map_errors(status);
1da177e4
LT		 2002}
2003
6b97fd3d
MN		 2004/*
2005 * Get locations and (maybe) other attributes of a referral.
2006 * Note that we'll actually follow the referral later when
2007 * we detect fsid mismatch in inode revalidation
2008 */
56659e99 2009static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2010{
2011 int status = -ENOMEM;
2012 struct page *page = NULL;
2013 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2014
2015 page = alloc_page(GFP_KERNEL);
2016 if (page == NULL)
2017 goto out;
2018 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2019 if (locations == NULL)
2020 goto out;
2021
c228fd3a 2022 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2023 if (status != 0)
2024 goto out;
2025 /* Make sure server returned a different fsid for the referral */
2026 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2027 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2028 status = -EIO;
2029 goto out;
2030 }
2031
2032 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2033 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2034 if (!fattr->mode)
2035 fattr->mode = S_IFDIR;
2036 memset(fhandle, 0, sizeof(struct nfs_fh));
2037out:
2038 if (page)
2039 __free_page(page);
2040 if (locations)
2041 kfree(locations);
2042 return status;
2043}
2044
1da177e4
LT		 2045static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2046{
2047 struct nfs4_getattr_arg args = {
2048 .fh = fhandle,
2049 .bitmask = server->attr_bitmask,
2050 };
2051 struct nfs4_getattr_res res = {
2052 .fattr = fattr,
2053 .server = server,
2054 };
2055 struct rpc_message msg = {
2056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2057 .rpc_argp = &args,
2058 .rpc_resp = &res,
2059 };
2060
0e574af1 2061 nfs_fattr_init(fattr);
cccef3b9 2062 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2063}
2064
2065static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2066{
2067 struct nfs4_exception exception = { };
2068 int err;
2069 do {
2070 err = nfs4_handle_exception(server,
2071 _nfs4_proc_getattr(server, fhandle, fattr),
2072 &exception);
2073 } while (exception.retry);
2074 return err;
2075}
2076
2077/*
2078 * The file is not closed if it is opened due to the a request to change
2079 * the size of the file. The open call will not be needed once the
2080 * VFS layer lookup-intents are implemented.
2081 *
2082 * Close is called when the inode is destroyed.
2083 * If we haven't opened the file for O_WRONLY, we
2084 * need to in the size_change case to obtain a stateid.
2085 *
2086 * Got race?
2087 * Because OPEN is always done by name in nfsv4, it is
2088 * possible that we opened a different file by the same
2089 * name. We can recognize this race condition, but we
2090 * can't do anything about it besides returning an error.
2091 *
2092 * This will be fixed with VFS changes (lookup-intent).
2093 */
2094static int
2095nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2096 struct iattr *sattr)
2097{
08e9eac4 2098 struct inode *inode = dentry->d_inode;
659bfcd6 2099 struct rpc_cred *cred = NULL;
d530838b 2100 struct nfs4_state *state = NULL;
1da177e4
LT		 2101 int status;
2102
0e574af1 2103 nfs_fattr_init(fattr);
1da177e4 2104
d530838b 2105 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2106 if (sattr->ia_valid & ATTR_FILE) {
2107 struct nfs_open_context *ctx;
2108
2109 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2110 if (ctx) {
2111 cred = ctx->cred;
2112 state = ctx->state;
2113 }
659bfcd6 2114 }
08e9eac4 2115
659bfcd6 2116 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2117 if (status == 0)
2118 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2119 return status;
2120}
2121
56659e99
TM		 2122static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2123 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2124 struct nfs_fattr *fattr)
2125{
2126 int status;
2127 struct nfs4_lookup_arg args = {
2128 .bitmask = server->attr_bitmask,
2129 .dir_fh = dirfh,
2130 .name = name,
2131 };
2132 struct nfs4_lookup_res res = {
2133 .server = server,
2134 .fattr = fattr,
2135 .fh = fhandle,
2136 };
2137 struct rpc_message msg = {
2138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2139 .rpc_argp = &args,
2140 .rpc_resp = &res,
2141 };
2142
2143 nfs_fattr_init(fattr);
2144
2145 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2146 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2147 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2148 return status;
2149}
2150
2151static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2152 struct qstr *name, struct nfs_fh *fhandle,
2153 struct nfs_fattr *fattr)
2154{
2155 struct nfs4_exception exception = { };
2156 int err;
2157 do {
4e56e082
TM		 2158 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2159 /* FIXME: !!!! */
2160 if (err == -NFS4ERR_MOVED) {
2161 err = -EREMOTE;
2162 break;
2163 }
2164 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2165 } while (exception.retry);
2166 return err;
2167}
2168
56659e99 2169static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2170 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2171{
4e56e082 2172 int status;
1da177e4
LT		 2173
2174 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2175 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2176 if (status == -NFS4ERR_MOVED)
2177 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2178 dprintk("NFS reply lookup: %d\n", status);
2179 return status;
2180}
2181
2182static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2183{
2184 struct nfs4_exception exception = { };
2185 int err;
2186 do {
2187 err = nfs4_handle_exception(NFS_SERVER(dir),
2188 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2189 &exception);
2190 } while (exception.retry);
2191 return err;
2192}
2193
2194static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2195{
76b32999
TM		 2196 struct nfs_server *server = NFS_SERVER(inode);
2197 struct nfs_fattr fattr;
1da177e4
LT		 2198 struct nfs4_accessargs args = {
2199 .fh = NFS_FH(inode),
76b32999
TM		 2200 .bitmask = server->attr_bitmask,
2201 };
2202 struct nfs4_accessres res = {
2203 .server = server,
2204 .fattr = &fattr,
1da177e4 2205 };
1da177e4
LT		 2206 struct rpc_message msg = {
2207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2208 .rpc_argp = &args,
2209 .rpc_resp = &res,
2210 .rpc_cred = entry->cred,
2211 };
2212 int mode = entry->mask;
2213 int status;
2214
2215 /*
2216 * Determine which access bits we want to ask for...
2217 */
2218 if (mode & MAY_READ)
2219 args.access |= NFS4_ACCESS_READ;
2220 if (S_ISDIR(inode->i_mode)) {
2221 if (mode & MAY_WRITE)
2222 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2223 if (mode & MAY_EXEC)
2224 args.access |= NFS4_ACCESS_LOOKUP;
2225 } else {
2226 if (mode & MAY_WRITE)
2227 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2228 if (mode & MAY_EXEC)
2229 args.access |= NFS4_ACCESS_EXECUTE;
2230 }
76b32999 2231 nfs_fattr_init(&fattr);
cccef3b9 2232 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2233 if (!status) {
2234 entry->mask = 0;
2235 if (res.access & NFS4_ACCESS_READ)
2236 entry->mask |= MAY_READ;
2237 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2238 entry->mask |= MAY_WRITE;
2239 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2240 entry->mask |= MAY_EXEC;
76b32999 2241 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2242 }
2243 return status;
2244}
2245
2246static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2247{
2248 struct nfs4_exception exception = { };
2249 int err;
2250 do {
2251 err = nfs4_handle_exception(NFS_SERVER(inode),
2252 _nfs4_proc_access(inode, entry),
2253 &exception);
2254 } while (exception.retry);
2255 return err;
2256}
2257
2258/*
2259 * TODO: For the time being, we don't try to get any attributes
2260 * along with any of the zero-copy operations READ, READDIR,
2261 * READLINK, WRITE.
2262 *
2263 * In the case of the first three, we want to put the GETATTR
2264 * after the read-type operation -- this is because it is hard
2265 * to predict the length of a GETATTR response in v4, and thus
2266 * align the READ data correctly. This means that the GETATTR
2267 * may end up partially falling into the page cache, and we should
2268 * shift it into the 'tail' of the xdr_buf before processing.
2269 * To do this efficiently, we need to know the total length
2270 * of data received, which doesn't seem to be available outside
2271 * of the RPC layer.
2272 *
2273 * In the case of WRITE, we also want to put the GETATTR after
2274 * the operation -- in this case because we want to make sure
2275 * we get the post-operation mtime and size. This means that
2276 * we can't use xdr_encode_pages() as written: we need a variant
2277 * of it which would leave room in the 'tail' iovec.
2278 *
2279 * Both of these changes to the XDR layer would in fact be quite
2280 * minor, but I decided to leave them for a subsequent patch.
2281 */
2282static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2283 unsigned int pgbase, unsigned int pglen)
2284{
2285 struct nfs4_readlink args = {
2286 .fh = NFS_FH(inode),
2287 .pgbase = pgbase,
2288 .pglen = pglen,
2289 .pages = &page,
2290 };
f50c7000 2291 struct nfs4_readlink_res res;
1da177e4
LT		 2292 struct rpc_message msg = {
2293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2294 .rpc_argp = &args,
f50c7000 2295 .rpc_resp = &res,
1da177e4
LT		 2296 };
2297
cccef3b9 2298 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2299}
2300
2301static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2302 unsigned int pgbase, unsigned int pglen)
2303{
2304 struct nfs4_exception exception = { };
2305 int err;
2306 do {
2307 err = nfs4_handle_exception(NFS_SERVER(inode),
2308 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2309 &exception);
2310 } while (exception.retry);
2311 return err;
2312}
2313
1da177e4
LT		 2314/*
2315 * Got race?
2316 * We will need to arrange for the VFS layer to provide an atomic open.
2317 * Until then, this create/open method is prone to inefficiency and race
2318 * conditions due to the lookup, create, and open VFS calls from sys_open()
2319 * placed on the wire.
2320 *
2321 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2322 * The file will be opened again in the subsequent VFS open call
2323 * (nfs4_proc_file_open).
2324 *
2325 * The open for read will just hang around to be used by any process that
2326 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2327 */
2328
2329static int
2330nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2331 int flags, struct nameidata *nd)
1da177e4 2332{
ad389da7 2333 struct path path = {
4ac91378 2334 .mnt = nd->path.mnt,
ad389da7
TM		 2335 .dentry = dentry,
2336 };
1da177e4
LT		 2337 struct nfs4_state *state;
2338 struct rpc_cred *cred;
dc0b027d 2339 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2340 int status = 0;
2341
98a8e323 2342 cred = rpc_lookup_cred();
1da177e4
LT		 2343 if (IS_ERR(cred)) {
2344 status = PTR_ERR(cred);
2345 goto out;
2346 }
dc0b027d 2347 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2348 d_drop(dentry);
1da177e4
LT		 2349 if (IS_ERR(state)) {
2350 status = PTR_ERR(state);
659bfcd6 2351 goto out_putcred;
1da177e4 2352 }
d4d9cdcb 2353 d_add(dentry, igrab(state->inode));
d75340cc 2354 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2355 if (flags & O_EXCL) {
2356 struct nfs_fattr fattr;
659bfcd6 2357 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2358 if (status == 0)
65e4308d 2359 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2360 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2361 }
ad389da7 2362 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2363 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2364 else
dc0b027d 2365 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2366out_putcred:
2367 put_rpccred(cred);
1da177e4
LT		 2368out:
2369 return status;
2370}
2371
2372static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2373{
16e42959 2374 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2375 struct nfs_removeargs args = {
1da177e4 2376 .fh = NFS_FH(dir),
4fdc17b2
TM		 2377 .name.len = name->len,
2378 .name.name = name->name,
16e42959
TM		 2379 .bitmask = server->attr_bitmask,
2380 };
4fdc17b2 2381 struct nfs_removeres res = {
16e42959 2382 .server = server,
1da177e4 2383 };
1da177e4 2384 struct rpc_message msg = {
4fdc17b2
TM		 2385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2386 .rpc_argp = &args,
2387 .rpc_resp = &res,
1da177e4
LT		 2388 };
2389 int status;
2390
4fdc17b2 2391 nfs_fattr_init(&res.dir_attr);
cccef3b9 2392 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2393 if (status == 0) {
2394 update_changeattr(dir, &res.cinfo);
4fdc17b2 2395 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2396 }
1da177e4
LT		 2397 return status;
2398}
2399
2400static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2401{
2402 struct nfs4_exception exception = { };
2403 int err;
2404 do {
2405 err = nfs4_handle_exception(NFS_SERVER(dir),
2406 _nfs4_proc_remove(dir, name),
2407 &exception);
2408 } while (exception.retry);
2409 return err;
2410}
2411
e4eff1a6 2412static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2413{
e4eff1a6
TM		 2414 struct nfs_server *server = NFS_SERVER(dir);
2415 struct nfs_removeargs *args = msg->rpc_argp;
2416 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2417
a65318bf 2418 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2419 res->server = server;
1da177e4 2420 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2421}
2422
e4eff1a6 2423static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2424{
e4eff1a6
TM		 2425 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2426
9e33bed5 2427 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2428 return 0;
2429 update_changeattr(dir, &res->cinfo);
2430 nfs_post_op_update_inode(dir, &res->dir_attr);
2431 return 1;
1da177e4
LT		 2432}
2433
2434static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2435 struct inode *new_dir, struct qstr *new_name)
2436{
6caf2c82 2437 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2438 struct nfs4_rename_arg arg = {
2439 .old_dir = NFS_FH(old_dir),
2440 .new_dir = NFS_FH(new_dir),
2441 .old_name = old_name,
2442 .new_name = new_name,
6caf2c82
TM		 2443 .bitmask = server->attr_bitmask,
2444 };
2445 struct nfs_fattr old_fattr, new_fattr;
2446 struct nfs4_rename_res res = {
2447 .server = server,
2448 .old_fattr = &old_fattr,
2449 .new_fattr = &new_fattr,
1da177e4 2450 };
1da177e4
LT		 2451 struct rpc_message msg = {
2452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2453 .rpc_argp = &arg,
2454 .rpc_resp = &res,
2455 };
2456 int status;
2457
6caf2c82
TM		 2458 nfs_fattr_init(res.old_fattr);
2459 nfs_fattr_init(res.new_fattr);
cccef3b9 2460 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2461
2462 if (!status) {
2463 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2464 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2465 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2466 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2467 }
2468 return status;
2469}
2470
2471static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2472 struct inode *new_dir, struct qstr *new_name)
2473{
2474 struct nfs4_exception exception = { };
2475 int err;
2476 do {
2477 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2478 _nfs4_proc_rename(old_dir, old_name,
2479 new_dir, new_name),
2480 &exception);
2481 } while (exception.retry);
2482 return err;
2483}
2484
2485static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2486{
91ba2eee 2487 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2488 struct nfs4_link_arg arg = {
2489 .fh = NFS_FH(inode),
2490 .dir_fh = NFS_FH(dir),
2491 .name = name,
91ba2eee
TM		 2492 .bitmask = server->attr_bitmask,
2493 };
2494 struct nfs_fattr fattr, dir_attr;
2495 struct nfs4_link_res res = {
2496 .server = server,
2497 .fattr = &fattr,
2498 .dir_attr = &dir_attr,
1da177e4 2499 };
1da177e4
LT		 2500 struct rpc_message msg = {
2501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2502 .rpc_argp = &arg,
91ba2eee 2503 .rpc_resp = &res,
1da177e4
LT		 2504 };
2505 int status;
2506
91ba2eee
TM		 2507 nfs_fattr_init(res.fattr);
2508 nfs_fattr_init(res.dir_attr);
cccef3b9 2509 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2510 if (!status) {
2511 update_changeattr(dir, &res.cinfo);
2512 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2513 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2514 }
1da177e4
LT		 2515
2516 return status;
2517}
2518
2519static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2520{
2521 struct nfs4_exception exception = { };
2522 int err;
2523 do {
2524 err = nfs4_handle_exception(NFS_SERVER(inode),
2525 _nfs4_proc_link(inode, dir, name),
2526 &exception);
2527 } while (exception.retry);
2528 return err;
2529}
2530
57dc9a57
TM		 2531struct nfs4_createdata {
2532 struct rpc_message msg;
2533 struct nfs4_create_arg arg;
2534 struct nfs4_create_res res;
2535 struct nfs_fh fh;
2536 struct nfs_fattr fattr;
2537 struct nfs_fattr dir_fattr;
2538};
2539
2540static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2541 struct qstr *name, struct iattr *sattr, u32 ftype)
2542{
2543 struct nfs4_createdata *data;
2544
2545 data = kzalloc(sizeof(*data), GFP_KERNEL);
2546 if (data != NULL) {
2547 struct nfs_server *server = NFS_SERVER(dir);
2548
2549 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2550 data->msg.rpc_argp = &data->arg;
2551 data->msg.rpc_resp = &data->res;
2552 data->arg.dir_fh = NFS_FH(dir);
2553 data->arg.server = server;
2554 data->arg.name = name;
2555 data->arg.attrs = sattr;
2556 data->arg.ftype = ftype;
2557 data->arg.bitmask = server->attr_bitmask;
2558 data->res.server = server;
2559 data->res.fh = &data->fh;
2560 data->res.fattr = &data->fattr;
2561 data->res.dir_fattr = &data->dir_fattr;
2562 nfs_fattr_init(data->res.fattr);
2563 nfs_fattr_init(data->res.dir_fattr);
2564 }
2565 return data;
2566}
2567
2568static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2569{
cccef3b9
AA		 2570 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2571 &data->arg, &data->res, 1);
57dc9a57
TM		 2572 if (status == 0) {
2573 update_changeattr(dir, &data->res.dir_cinfo);
2574 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2575 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2576 }
2577 return status;
2578}
2579
2580static void nfs4_free_createdata(struct nfs4_createdata *data)
2581{
2582 kfree(data);
2583}
2584
4f390c15 2585static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2586 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2587{
57dc9a57
TM		 2588 struct nfs4_createdata *data;
2589 int status = -ENAMETOOLONG;
1da177e4 2590
94a6d753 2591 if (len > NFS4_MAXPATHLEN)
57dc9a57 2592 goto out;
4f390c15 2593
57dc9a57
TM		 2594 status = -ENOMEM;
2595 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2596 if (data == NULL)
2597 goto out;
2598
2599 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2600 data->arg.u.symlink.pages = &page;
2601 data->arg.u.symlink.len = len;
1da177e4 2602
57dc9a57
TM		 2603 status = nfs4_do_create(dir, dentry, data);
2604
2605 nfs4_free_createdata(data);
2606out:
1da177e4
LT		 2607 return status;
2608}
2609
4f390c15 2610static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2611 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2612{
2613 struct nfs4_exception exception = { };
2614 int err;
2615 do {
2616 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2617 _nfs4_proc_symlink(dir, dentry, page,
2618 len, sattr),
1da177e4
LT		 2619 &exception);
2620 } while (exception.retry);
2621 return err;
2622}
2623
2624static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2625 struct iattr *sattr)
2626{
57dc9a57
TM		 2627 struct nfs4_createdata *data;
2628 int status = -ENOMEM;
1da177e4 2629
57dc9a57
TM		 2630 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2631 if (data == NULL)
2632 goto out;
2633
2634 status = nfs4_do_create(dir, dentry, data);
2635
2636 nfs4_free_createdata(data);
2637out:
1da177e4
LT		 2638 return status;
2639}
2640
2641static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2642 struct iattr *sattr)
2643{
2644 struct nfs4_exception exception = { };
2645 int err;
2646 do {
2647 err = nfs4_handle_exception(NFS_SERVER(dir),
2648 _nfs4_proc_mkdir(dir, dentry, sattr),
2649 &exception);
2650 } while (exception.retry);
2651 return err;
2652}
2653
2654static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2655 u64 cookie, struct page *page, unsigned int count, int plus)
2656{
2657 struct inode *dir = dentry->d_inode;
2658 struct nfs4_readdir_arg args = {
2659 .fh = NFS_FH(dir),
2660 .pages = &page,
2661 .pgbase = 0,
2662 .count = count,
a65318bf 2663 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2664 };
2665 struct nfs4_readdir_res res;
2666 struct rpc_message msg = {
2667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2668 .rpc_argp = &args,
2669 .rpc_resp = &res,
2670 .rpc_cred = cred,
2671 };
2672 int status;
2673
3110ff80 2674 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2675 dentry->d_parent->d_name.name,
2676 dentry->d_name.name,
2677 (unsigned long long)cookie);
1da177e4
LT		 2678 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2679 res.pgbase = args.pgbase;
cccef3b9 2680 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2681 if (status == 0)
2682 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2683
2684 nfs_invalidate_atime(dir);
2685
3110ff80 2686 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2687 return status;
2688}
2689
2690static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2691 u64 cookie, struct page *page, unsigned int count, int plus)
2692{
2693 struct nfs4_exception exception = { };
2694 int err;
2695 do {
2696 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2697 _nfs4_proc_readdir(dentry, cred, cookie,
2698 page, count, plus),
2699 &exception);
2700 } while (exception.retry);
2701 return err;
2702}
2703
2704static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2705 struct iattr *sattr, dev_t rdev)
2706{
57dc9a57
TM		 2707 struct nfs4_createdata *data;
2708 int mode = sattr->ia_mode;
2709 int status = -ENOMEM;
1da177e4
LT		 2710
2711 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2712 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2713
2714 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2715 if (data == NULL)
2716 goto out;
2717
1da177e4 2718 if (S_ISFIFO(mode))
57dc9a57 2719 data->arg.ftype = NF4FIFO;
1da177e4 2720 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2721 data->arg.ftype = NF4BLK;
2722 data->arg.u.device.specdata1 = MAJOR(rdev);
2723 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2724 }
2725 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2726 data->arg.ftype = NF4CHR;
2727 data->arg.u.device.specdata1 = MAJOR(rdev);
2728 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2729 }
1da177e4 2730
57dc9a57
TM		 2731 status = nfs4_do_create(dir, dentry, data);
2732
2733 nfs4_free_createdata(data);
2734out:
1da177e4
LT		 2735 return status;
2736}
2737
2738static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2739 struct iattr *sattr, dev_t rdev)
2740{
2741 struct nfs4_exception exception = { };
2742 int err;
2743 do {
2744 err = nfs4_handle_exception(NFS_SERVER(dir),
2745 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2746 &exception);
2747 } while (exception.retry);
2748 return err;
2749}
2750
2751static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2752 struct nfs_fsstat *fsstat)
2753{
2754 struct nfs4_statfs_arg args = {
2755 .fh = fhandle,
2756 .bitmask = server->attr_bitmask,
2757 };
24ad148a
BH		 2758 struct nfs4_statfs_res res = {
2759 .fsstat = fsstat,
2760 };
1da177e4
LT		 2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2763 .rpc_argp = &args,
24ad148a 2764 .rpc_resp = &res,
1da177e4
LT		 2765 };
2766
0e574af1 2767 nfs_fattr_init(fsstat->fattr);
cccef3b9 2768 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2769}
2770
2771static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2772{
2773 struct nfs4_exception exception = { };
2774 int err;
2775 do {
2776 err = nfs4_handle_exception(server,
2777 _nfs4_proc_statfs(server, fhandle, fsstat),
2778 &exception);
2779 } while (exception.retry);
2780 return err;
2781}
2782
2783static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2784 struct nfs_fsinfo *fsinfo)
2785{
2786 struct nfs4_fsinfo_arg args = {
2787 .fh = fhandle,
2788 .bitmask = server->attr_bitmask,
2789 };
3dda5e43
BH		 2790 struct nfs4_fsinfo_res res = {
2791 .fsinfo = fsinfo,
2792 };
1da177e4
LT		 2793 struct rpc_message msg = {
2794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2795 .rpc_argp = &args,
3dda5e43 2796 .rpc_resp = &res,
1da177e4
LT		 2797 };
2798
cccef3b9 2799 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2800}
2801
2802static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2803{
2804 struct nfs4_exception exception = { };
2805 int err;
2806
2807 do {
2808 err = nfs4_handle_exception(server,
2809 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2810 &exception);
2811 } while (exception.retry);
2812 return err;
2813}
2814
2815static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2816{
0e574af1 2817 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2818 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2819}
2820
2821static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2822 struct nfs_pathconf *pathconf)
2823{
2824 struct nfs4_pathconf_arg args = {
2825 .fh = fhandle,
2826 .bitmask = server->attr_bitmask,
2827 };
d45b2989
BH		 2828 struct nfs4_pathconf_res res = {
2829 .pathconf = pathconf,
2830 };
1da177e4
LT		 2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2833 .rpc_argp = &args,
d45b2989 2834 .rpc_resp = &res,
1da177e4
LT		 2835 };
2836
2837 /* None of the pathconf attributes are mandatory to implement */
2838 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2839 memset(pathconf, 0, sizeof(*pathconf));
2840 return 0;
2841 }
2842
0e574af1 2843 nfs_fattr_init(pathconf->fattr);
cccef3b9 2844 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2845}
2846
2847static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2848 struct nfs_pathconf *pathconf)
2849{
2850 struct nfs4_exception exception = { };
2851 int err;
2852
2853 do {
2854 err = nfs4_handle_exception(server,
2855 _nfs4_proc_pathconf(server, fhandle, pathconf),
2856 &exception);
2857 } while (exception.retry);
2858 return err;
2859}
2860
ec06c096 2861static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2862{
ec06c096 2863 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2864
9e33bed5 2865 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2866 rpc_restart_call(task);
ec06c096 2867 return -EAGAIN;
1da177e4 2868 }
8850df99
TM		 2869
2870 nfs_invalidate_atime(data->inode);
1da177e4 2871 if (task->tk_status > 0)
ec06c096
TM		 2872 renew_lease(server, data->timestamp);
2873 return 0;
1da177e4
LT		 2874}
2875
bdc7f021 2876static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2877{
1da177e4 2878 data->timestamp = jiffies;
bdc7f021 2879 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2880}
2881
788e7a89 2882static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2883{
1da177e4
LT		 2884 struct inode *inode = data->inode;
2885
9e33bed5 2886 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2887 rpc_restart_call(task);
788e7a89 2888 return -EAGAIN;
1da177e4 2889 }
4f9838c7 2890 if (task->tk_status >= 0) {
1da177e4 2891 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2892 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2893 }
788e7a89 2894 return 0;
1da177e4
LT		 2895}
2896
bdc7f021 2897static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2898{
bdc7f021
TM		 2899 struct nfs_server *server = NFS_SERVER(data->inode);
2900
a65318bf 2901 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2902 data->res.server = server;
1da177e4
LT		 2903 data->timestamp = jiffies;
2904
bdc7f021 2905 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2906}
2907
788e7a89 2908static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2909{
1da177e4
LT		 2910 struct inode *inode = data->inode;
2911
9e33bed5 2912 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2913 rpc_restart_call(task);
788e7a89 2914 return -EAGAIN;
1da177e4 2915 }
9e08a3c5 2916 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2917 return 0;
1da177e4
LT		 2918}
2919
bdc7f021 2920static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2921{
788e7a89 2922 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2923
a65318bf 2924 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2925 data->res.server = server;
bdc7f021 2926 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2927}
2928
2929/*
2930 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2931 * standalone procedure for queueing an asynchronous RENEW.
2932 */
963d8fe5 2933static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2934{
adfa6f98 2935 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2936 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2937
2938 if (task->tk_status < 0) {
95baa25c
TM		 2939 /* Unless we're shutting down, schedule state recovery! */
2940 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2941 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2942 return;
2943 }
2944 spin_lock(&clp->cl_lock);
2945 if (time_before(clp->cl_last_renewal,timestamp))
2946 clp->cl_last_renewal = timestamp;
2947 spin_unlock(&clp->cl_lock);
2948}
2949
963d8fe5
TM		 2950static const struct rpc_call_ops nfs4_renew_ops = {
2951 .rpc_call_done = nfs4_renew_done,
2952};
2953
adfa6f98 2954int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2955{
2956 struct rpc_message msg = {
2957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2958 .rpc_argp = clp,
b4454fe1 2959 .rpc_cred = cred,
1da177e4
LT		 2960 };
2961
2962 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2963 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2964}
2965
adfa6f98 2966int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2967{
2968 struct rpc_message msg = {
2969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2970 .rpc_argp = clp,
b4454fe1 2971 .rpc_cred = cred,
1da177e4
LT		 2972 };
2973 unsigned long now = jiffies;
2974 int status;
2975
2976 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2977 if (status < 0)
2978 return status;
2979 spin_lock(&clp->cl_lock);
2980 if (time_before(clp->cl_last_renewal,now))
2981 clp->cl_last_renewal = now;
2982 spin_unlock(&clp->cl_lock);
2983 return 0;
2984}
2985
aa1870af
BF		 2986static inline int nfs4_server_supports_acls(struct nfs_server *server)
2987{
2988 return (server->caps & NFS_CAP_ACLS)
2989 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2990 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2991}
2992
2993/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2994 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2995 * the stack.
2996 */
2997#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2998
2999static void buf_to_pages(const void *buf, size_t buflen,
3000 struct page **pages, unsigned int *pgbase)
3001{
3002 const void *p = buf;
3003
3004 *pgbase = offset_in_page(buf);
3005 p -= *pgbase;
3006 while (p < buf + buflen) {
3007 *(pages++) = virt_to_page(p);
3008 p += PAGE_CACHE_SIZE;
3009 }
3010}
3011
e50a1c2e
BF		 3012struct nfs4_cached_acl {
3013 int cached;
3014 size_t len;
3e9d4154 3015 char data[0];
e50a1c2e
BF		 3016};
3017
3018static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3019{
3020 struct nfs_inode *nfsi = NFS_I(inode);
3021
3022 spin_lock(&inode->i_lock);
3023 kfree(nfsi->nfs4_acl);
3024 nfsi->nfs4_acl = acl;
3025 spin_unlock(&inode->i_lock);
3026}
3027
3028static void nfs4_zap_acl_attr(struct inode *inode)
3029{
3030 nfs4_set_cached_acl(inode, NULL);
3031}
3032
3033static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3034{
3035 struct nfs_inode *nfsi = NFS_I(inode);
3036 struct nfs4_cached_acl *acl;
3037 int ret = -ENOENT;
3038
3039 spin_lock(&inode->i_lock);
3040 acl = nfsi->nfs4_acl;
3041 if (acl == NULL)
3042 goto out;
3043 if (buf == NULL) /* user is just asking for length */
3044 goto out_len;
3045 if (acl->cached == 0)
3046 goto out;
3047 ret = -ERANGE; /* see getxattr(2) man page */
3048 if (acl->len > buflen)
3049 goto out;
3050 memcpy(buf, acl->data, acl->len);
3051out_len:
3052 ret = acl->len;
3053out:
3054 spin_unlock(&inode->i_lock);
3055 return ret;
3056}
3057
3058static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3059{
3060 struct nfs4_cached_acl *acl;
3061
3062 if (buf && acl_len <= PAGE_SIZE) {
3063 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3064 if (acl == NULL)
3065 goto out;
3066 acl->cached = 1;
3067 memcpy(acl->data, buf, acl_len);
3068 } else {
3069 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3070 if (acl == NULL)
3071 goto out;
3072 acl->cached = 0;
3073 }
3074 acl->len = acl_len;
3075out:
3076 nfs4_set_cached_acl(inode, acl);
3077}
3078
16b4289c 3079static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3080{
aa1870af
BF		 3081 struct page *pages[NFS4ACL_MAXPAGES];
3082 struct nfs_getaclargs args = {
3083 .fh = NFS_FH(inode),
3084 .acl_pages = pages,
3085 .acl_len = buflen,
3086 };
663c79b3
BH		 3087 struct nfs_getaclres res = {
3088 .acl_len = buflen,
3089 };
e50a1c2e 3090 void *resp_buf;
aa1870af
BF		 3091 struct rpc_message msg = {
3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3093 .rpc_argp = &args,
663c79b3 3094 .rpc_resp = &res,
aa1870af 3095 };
e50a1c2e 3096 struct page *localpage = NULL;
aa1870af
BF		 3097 int ret;
3098
e50a1c2e
BF		 3099 if (buflen < PAGE_SIZE) {
3100 /* As long as we're doing a round trip to the server anyway,
3101 * let's be prepared for a page of acl data. */
3102 localpage = alloc_page(GFP_KERNEL);
3103 resp_buf = page_address(localpage);
3104 if (localpage == NULL)
3105 return -ENOMEM;
3106 args.acl_pages[0] = localpage;
3107 args.acl_pgbase = 0;
663c79b3 3108 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3109 } else {
3110 resp_buf = buf;
3111 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3112 }
cccef3b9 3113 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3114 if (ret)
3115 goto out_free;
663c79b3
BH		 3116 if (res.acl_len > args.acl_len)
3117 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3118 else
663c79b3 3119 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3120 if (buf) {
3121 ret = -ERANGE;
663c79b3 3122 if (res.acl_len > buflen)
e50a1c2e
BF		 3123 goto out_free;
3124 if (localpage)
663c79b3 3125 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3126 }
663c79b3 3127 ret = res.acl_len;
e50a1c2e
BF		 3128out_free:
3129 if (localpage)
3130 __free_page(localpage);
aa1870af
BF		 3131 return ret;
3132}
3133
16b4289c
TM		 3134static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3135{
3136 struct nfs4_exception exception = { };
3137 ssize_t ret;
3138 do {
3139 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3140 if (ret >= 0)
3141 break;
3142 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3143 } while (exception.retry);
3144 return ret;
3145}
3146
e50a1c2e
BF		 3147static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3148{
3149 struct nfs_server *server = NFS_SERVER(inode);
3150 int ret;
3151
3152 if (!nfs4_server_supports_acls(server))
3153 return -EOPNOTSUPP;
3154 ret = nfs_revalidate_inode(server, inode);
3155 if (ret < 0)
3156 return ret;
f41f7418
TM		 3157 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3158 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3159 ret = nfs4_read_cached_acl(inode, buf, buflen);
3160 if (ret != -ENOENT)
3161 return ret;
3162 return nfs4_get_acl_uncached(inode, buf, buflen);
3163}
3164
16b4289c 3165static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3166{
3167 struct nfs_server *server = NFS_SERVER(inode);
3168 struct page *pages[NFS4ACL_MAXPAGES];
3169 struct nfs_setaclargs arg = {
3170 .fh = NFS_FH(inode),
3171 .acl_pages = pages,
3172 .acl_len = buflen,
3173 };
73c403a9 3174 struct nfs_setaclres res;
4b580ee3
BF		 3175 struct rpc_message msg = {
3176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3177 .rpc_argp = &arg,
73c403a9 3178 .rpc_resp = &res,
4b580ee3
BF		 3179 };
3180 int ret;
3181
3182 if (!nfs4_server_supports_acls(server))
3183 return -EOPNOTSUPP;
642ac549 3184 nfs_inode_return_delegation(inode);
4b580ee3 3185 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3186 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3187 nfs_access_zap_cache(inode);
3188 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3189 return ret;
3190}
3191
16b4289c
TM		 3192static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3193{
3194 struct nfs4_exception exception = { };
3195 int err;
3196 do {
3197 err = nfs4_handle_exception(NFS_SERVER(inode),
3198 __nfs4_proc_set_acl(inode, buf, buflen),
3199 &exception);
3200 } while (exception.retry);
3201 return err;
3202}
3203
1da177e4 3204static int
9e33bed5 3205nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3206{
7539bbab 3207 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 3208
3209 if (!clp || task->tk_status >= 0)
3210 return 0;
3211 switch(task->tk_status) {
9e33bed5
TM		 3212 case -NFS4ERR_ADMIN_REVOKED:
3213 case -NFS4ERR_BAD_STATEID:
3214 case -NFS4ERR_OPENMODE:
3215 if (state == NULL)
3216 break;
3217 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3218 case -NFS4ERR_STALE_CLIENTID:
3219 case -NFS4ERR_STALE_STATEID:
3220 case -NFS4ERR_EXPIRED:
5d00837b 3221 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3222 nfs4_schedule_state_recovery(clp);
e005e804 3223 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3224 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3225 task->tk_status = 0;
3226 return -EAGAIN;
1da177e4 3227 case -NFS4ERR_DELAY:
2e96d286 3228 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3229 case -NFS4ERR_GRACE:
1da177e4
LT		 3230 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3231 task->tk_status = 0;
3232 return -EAGAIN;
3233 case -NFS4ERR_OLD_STATEID:
3234 task->tk_status = 0;
3235 return -EAGAIN;
3236 }
3237 task->tk_status = nfs4_map_errors(task->tk_status);
3238 return 0;
3239}
3240
adfa6f98 3241int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3242{
3243 nfs4_verifier sc_verifier;
3244 struct nfs4_setclientid setclientid = {
3245 .sc_verifier = &sc_verifier,
3246 .sc_prog = program,
3247 };
3248 struct rpc_message msg = {
3249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3250 .rpc_argp = &setclientid,
3251 .rpc_resp = clp,
286d7d6a 3252 .rpc_cred = cred,
1da177e4 3253 };
bc4785cd 3254 __be32 *p;
1da177e4
LT		 3255 int loop = 0;
3256 int status;
3257
bc4785cd 3258 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3259 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3260 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3261
3262 for(;;) {
3263 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3264 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3265 clp->cl_ipaddr,
3266 rpc_peeraddr2str(clp->cl_rpcclient,
3267 RPC_DISPLAY_ADDR),
69dd716c
TM		 3268 rpc_peeraddr2str(clp->cl_rpcclient,
3269 RPC_DISPLAY_PROTO),
78ea323b 3270 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3271 clp->cl_id_uniquifier);
3272 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3273 sizeof(setclientid.sc_netid),
3274 rpc_peeraddr2str(clp->cl_rpcclient,
3275 RPC_DISPLAY_NETID));
1da177e4 3276 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3277 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3278 clp->cl_ipaddr, port >> 8, port & 255);
3279
3280 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3281 if (status != -NFS4ERR_CLID_INUSE)
3282 break;
3283 if (signalled())
3284 break;
3285 if (loop++ & 1)
3286 ssleep(clp->cl_lease_time + 1);
3287 else
3288 if (++clp->cl_id_uniquifier == 0)
3289 break;
3290 }
3291 return status;
3292}
3293
adfa6f98 3294static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3295{
3296 struct nfs_fsinfo fsinfo;
3297 struct rpc_message msg = {
3298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3299 .rpc_argp = clp,
3300 .rpc_resp = &fsinfo,
286d7d6a 3301 .rpc_cred = cred,
1da177e4
LT		 3302 };
3303 unsigned long now;
3304 int status;
3305
3306 now = jiffies;
3307 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3308 if (status == 0) {
3309 spin_lock(&clp->cl_lock);
3310 clp->cl_lease_time = fsinfo.lease_time * HZ;
3311 clp->cl_last_renewal = now;
3312 spin_unlock(&clp->cl_lock);
3313 }
3314 return status;
3315}
3316
adfa6f98 3317int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3318{
77e03677 3319 long timeout = 0;
51581f3b
TM		 3320 int err;
3321 do {
3322 err = _nfs4_proc_setclientid_confirm(clp, cred);
3323 switch (err) {
3324 case 0:
3325 return err;
3326 case -NFS4ERR_RESOURCE:
3327 /* The IBM lawyers misread another document! */
3328 case -NFS4ERR_DELAY:
3329 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3330 }
3331 } while (err == 0);
3332 return err;
3333}
3334
fe650407
TM		 3335struct nfs4_delegreturndata {
3336 struct nfs4_delegreturnargs args;
fa178f29 3337 struct nfs4_delegreturnres res;
fe650407
TM		 3338 struct nfs_fh fh;
3339 nfs4_stateid stateid;
26e976a8 3340 unsigned long timestamp;
fa178f29 3341 struct nfs_fattr fattr;
fe650407
TM		 3342 int rpc_status;
3343};
3344
fe650407
TM		 3345static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3346{
3347 struct nfs4_delegreturndata *data = calldata;
3348 data->rpc_status = task->tk_status;
26e976a8 3349 if (data->rpc_status == 0)
fa178f29 3350 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3351}
3352
3353static void nfs4_delegreturn_release(void *calldata)
3354{
fe650407
TM		 3355 kfree(calldata);
3356}
3357
c8d149f3 3358static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3359 .rpc_call_done = nfs4_delegreturn_done,
3360 .rpc_release = nfs4_delegreturn_release,
3361};
3362
e6f81075 3363static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3364{
3365 struct nfs4_delegreturndata *data;
fa178f29 3366 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3367 struct rpc_task *task;
5138fde0
TM		 3368 struct rpc_message msg = {
3369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3370 .rpc_cred = cred,
3371 };
c970aa85
TM		 3372 struct rpc_task_setup task_setup_data = {
3373 .rpc_client = server->client,
5138fde0 3374 .rpc_message = &msg,
c970aa85
TM		 3375 .callback_ops = &nfs4_delegreturn_ops,
3376 .flags = RPC_TASK_ASYNC,
3377 };
e6f81075 3378 int status = 0;
fe650407
TM		 3379
3380 data = kmalloc(sizeof(*data), GFP_KERNEL);
3381 if (data == NULL)
3382 return -ENOMEM;
3383 data->args.fhandle = &data->fh;
3384 data->args.stateid = &data->stateid;
fa178f29 3385 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3386 nfs_copy_fh(&data->fh, NFS_FH(inode));
3387 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3388 data->res.fattr = &data->fattr;
3389 data->res.server = server;
5f7dbd5c 3390 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3391 nfs_fattr_init(data->res.fattr);
26e976a8 3392 data->timestamp = jiffies;
fe650407
TM		 3393 data->rpc_status = 0;
3394
c970aa85 3395 task_setup_data.callback_data = data;
5138fde0
TM		 3396 msg.rpc_argp = &data->args,
3397 msg.rpc_resp = &data->res,
c970aa85 3398 task = rpc_run_task(&task_setup_data);
7a1218a2 3399 if (IS_ERR(task))
fe650407 3400 return PTR_ERR(task);
e6f81075
TM		 3401 if (!issync)
3402 goto out;
fe650407 3403 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3404 if (status != 0)
3405 goto out;
3406 status = data->rpc_status;
3407 if (status != 0)
3408 goto out;
3409 nfs_refresh_inode(inode, &data->fattr);
3410out:
e6b3c4db 3411 rpc_put_task(task);
fe650407 3412 return status;
1da177e4
LT		 3413}
3414
e6f81075 3415int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3416{
3417 struct nfs_server *server = NFS_SERVER(inode);
3418 struct nfs4_exception exception = { };
3419 int err;
3420 do {
e6f81075 3421 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3422 switch (err) {
3423 case -NFS4ERR_STALE_STATEID:
3424 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3425 case 0:
3426 return 0;
3427 }
3428 err = nfs4_handle_exception(server, err, &exception);
3429 } while (exception.retry);
3430 return err;
3431}
3432
3433#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3434#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3435
3436/*
3437 * sleep, with exponential backoff, and retry the LOCK operation.
3438 */
3439static unsigned long
3440nfs4_set_lock_task_retry(unsigned long timeout)
3441{
150030b7 3442 schedule_timeout_killable(timeout);
1da177e4
LT		 3443 timeout <<= 1;
3444 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3445 return NFS4_LOCK_MAXTIMEOUT;
3446 return timeout;
3447}
3448
1da177e4
LT		 3449static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3450{
3451 struct inode *inode = state->inode;
3452 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3453 struct nfs_client *clp = server->nfs_client;
911d1aaf 3454 struct nfs_lockt_args arg = {
1da177e4 3455 .fh = NFS_FH(inode),
911d1aaf 3456 .fl = request,
1da177e4 3457 };
911d1aaf
TM		 3458 struct nfs_lockt_res res = {
3459 .denied = request,
1da177e4
LT		 3460 };
3461 struct rpc_message msg = {
3462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3463 .rpc_argp = &arg,
3464 .rpc_resp = &res,
3465 .rpc_cred = state->owner->so_cred,
3466 };
1da177e4
LT		 3467 struct nfs4_lock_state *lsp;
3468 int status;
3469
911d1aaf 3470 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3471 status = nfs4_set_lock_state(state, request);
3472 if (status != 0)
3473 goto out;
3474 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3475 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3476 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3477 switch (status) {
3478 case 0:
3479 request->fl_type = F_UNLCK;
3480 break;
3481 case -NFS4ERR_DENIED:
3482 status = 0;
1da177e4 3483 }
70cc6487 3484 request->fl_ops->fl_release_private(request);
8d0a8a9d 3485out:
1da177e4
LT		 3486 return status;
3487}
3488
3489static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3490{
3491 struct nfs4_exception exception = { };
3492 int err;
3493
3494 do {
3495 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3496 _nfs4_proc_getlk(state, cmd, request),
3497 &exception);
3498 } while (exception.retry);
3499 return err;
3500}
3501
3502static int do_vfs_lock(struct file *file, struct file_lock *fl)
3503{
3504 int res = 0;
3505 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3506 case FL_POSIX:
3507 res = posix_lock_file_wait(file, fl);
3508 break;
3509 case FL_FLOCK:
3510 res = flock_lock_file_wait(file, fl);
3511 break;
3512 default:
3513 BUG();
3514 }
1da177e4
LT		 3515 return res;
3516}
3517
faf5f49c 3518struct nfs4_unlockdata {
911d1aaf
TM		 3519 struct nfs_locku_args arg;
3520 struct nfs_locku_res res;
faf5f49c
TM		 3521 struct nfs4_lock_state *lsp;
3522 struct nfs_open_context *ctx;
911d1aaf
TM		 3523 struct file_lock fl;
3524 const struct nfs_server *server;
26e976a8 3525 unsigned long timestamp;
faf5f49c
TM		 3526};
3527
911d1aaf
TM		 3528static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3529 struct nfs_open_context *ctx,
3530 struct nfs4_lock_state *lsp,
3531 struct nfs_seqid *seqid)
3532{
3533 struct nfs4_unlockdata *p;
3534 struct inode *inode = lsp->ls_state->inode;
3535
3536 p = kmalloc(sizeof(*p), GFP_KERNEL);
3537 if (p == NULL)
3538 return NULL;
3539 p->arg.fh = NFS_FH(inode);
3540 p->arg.fl = &p->fl;
3541 p->arg.seqid = seqid;
c1d51931 3542 p->res.seqid = seqid;
5f7dbd5c 3543 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3544 p->arg.stateid = &lsp->ls_stateid;
3545 p->lsp = lsp;
3546 atomic_inc(&lsp->ls_count);
3547 /* Ensure we don't close file until we're done freeing locks! */
3548 p->ctx = get_nfs_open_context(ctx);
3549 memcpy(&p->fl, fl, sizeof(p->fl));
3550 p->server = NFS_SERVER(inode);
3551 return p;
3552}
3553
06f814a3 3554static void nfs4_locku_release_calldata(void *data)
faf5f49c 3555{
963d8fe5 3556 struct nfs4_unlockdata *calldata = data;
911d1aaf 3557 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3558 nfs4_put_lock_state(calldata->lsp);
3559 put_nfs_open_context(calldata->ctx);
3560 kfree(calldata);
faf5f49c
TM		 3561}
3562
963d8fe5 3563static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3564{
963d8fe5 3565 struct nfs4_unlockdata *calldata = data;
faf5f49c 3566
06f814a3
TM		 3567 if (RPC_ASSASSINATED(task))
3568 return;
faf5f49c
TM		 3569 switch (task->tk_status) {
3570 case 0:
3571 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3572 calldata->res.stateid.data,
faf5f49c 3573 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3574 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3575 break;
9e33bed5
TM		 3576 case -NFS4ERR_BAD_STATEID:
3577 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3578 case -NFS4ERR_STALE_STATEID:
3579 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3580 break;
3581 default:
9e33bed5 3582 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3583 rpc_restart_call(task);
faf5f49c 3584 }
faf5f49c
TM		 3585}
3586
4ce70ada 3587static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3588{
4ce70ada 3589 struct nfs4_unlockdata *calldata = data;
faf5f49c 3590
911d1aaf 3591 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3592 return;
3593 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3594 /* Note: exit _without_ running nfs4_locku_done */
3595 task->tk_action = NULL;
faf5f49c
TM		 3596 return;
3597 }
26e976a8 3598 calldata->timestamp = jiffies;
5138fde0 3599 rpc_call_start(task);
faf5f49c
TM		 3600}
3601
963d8fe5 3602static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3603 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3604 .rpc_call_done = nfs4_locku_done,
06f814a3 3605 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3606};
3607
a5d16a4d
TM		 3608static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3609 struct nfs_open_context *ctx,
3610 struct nfs4_lock_state *lsp,
3611 struct nfs_seqid *seqid)
3612{
3613 struct nfs4_unlockdata *data;
5138fde0
TM		 3614 struct rpc_message msg = {
3615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3616 .rpc_cred = ctx->cred,
3617 };
c970aa85
TM		 3618 struct rpc_task_setup task_setup_data = {
3619 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3620 .rpc_message = &msg,
c970aa85 3621 .callback_ops = &nfs4_locku_ops,
101070ca 3622 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3623 .flags = RPC_TASK_ASYNC,
3624 };
a5d16a4d 3625
137d6aca
FF		 3626 /* Ensure this is an unlock - when canceling a lock, the
3627 * canceled lock is passed in, and it won't be an unlock.
3628 */
3629 fl->fl_type = F_UNLCK;
3630
a5d16a4d
TM		 3631 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3632 if (data == NULL) {
3633 nfs_free_seqid(seqid);
3634 return ERR_PTR(-ENOMEM);
3635 }
3636
5138fde0
TM		 3637 msg.rpc_argp = &data->arg,
3638 msg.rpc_resp = &data->res,
c970aa85
TM		 3639 task_setup_data.callback_data = data;
3640 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3641}
3642
faf5f49c
TM		 3643static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3644{
19e03c57 3645 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3646 struct nfs_seqid *seqid;
1da177e4 3647 struct nfs4_lock_state *lsp;
06f814a3
TM		 3648 struct rpc_task *task;
3649 int status = 0;
536ff0f8 3650 unsigned char fl_flags = request->fl_flags;
faf5f49c 3651
8d0a8a9d 3652 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3653 /* Unlock _before_ we do the RPC call */
3654 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3655 down_read(&nfsi->rwsem);
3656 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3657 up_read(&nfsi->rwsem);
9b073574 3658 goto out;
19e03c57
TM		 3659 }
3660 up_read(&nfsi->rwsem);
8d0a8a9d 3661 if (status != 0)
9b073574
TM		 3662 goto out;
3663 /* Is this a delegated lock? */
3664 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3665 goto out;
8d0a8a9d 3666 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3667 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3668 status = -ENOMEM;
911d1aaf 3669 if (seqid == NULL)
9b073574 3670 goto out;
cd3758e3 3671 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3672 status = PTR_ERR(task);
3673 if (IS_ERR(task))
9b073574 3674 goto out;
a5d16a4d 3675 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3676 rpc_put_task(task);
9b073574 3677out:
536ff0f8 3678 request->fl_flags = fl_flags;
1da177e4
LT		 3679 return status;
3680}
3681
a5d16a4d
TM		 3682struct nfs4_lockdata {
3683 struct nfs_lock_args arg;
3684 struct nfs_lock_res res;
3685 struct nfs4_lock_state *lsp;
3686 struct nfs_open_context *ctx;
3687 struct file_lock fl;
26e976a8 3688 unsigned long timestamp;
a5d16a4d
TM		 3689 int rpc_status;
3690 int cancelled;
66179efe 3691 struct nfs_server *server;
a5d16a4d
TM		 3692};
3693
3694static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3695 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3696{
a5d16a4d
TM		 3697 struct nfs4_lockdata *p;
3698 struct inode *inode = lsp->ls_state->inode;
1da177e4 3699 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3700
3701 p = kzalloc(sizeof(*p), GFP_KERNEL);
3702 if (p == NULL)
3703 return NULL;
3704
3705 p->arg.fh = NFS_FH(inode);
3706 p->arg.fl = &p->fl;
2f74c0a0
TM		 3707 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3708 if (p->arg.open_seqid == NULL)
3709 goto out_free;
a5d16a4d
TM		 3710 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3711 if (p->arg.lock_seqid == NULL)
2f74c0a0 3712 goto out_free_seqid;
a5d16a4d 3713 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3714 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3715 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3716 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3717 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3718 p->lsp = lsp;
66179efe 3719 p->server = server;
a5d16a4d
TM		 3720 atomic_inc(&lsp->ls_count);
3721 p->ctx = get_nfs_open_context(ctx);
3722 memcpy(&p->fl, fl, sizeof(p->fl));
3723 return p;
2f74c0a0
TM		 3724out_free_seqid:
3725 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3726out_free:
3727 kfree(p);
3728 return NULL;
3729}
3730
3731static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3732{
3733 struct nfs4_lockdata *data = calldata;
3734 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3735
3110ff80 3736 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3737 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3738 return;
a5d16a4d
TM		 3739 /* Do we need to do an open_to_lock_owner? */
3740 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3741 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3742 return;
a5d16a4d
TM		 3743 data->arg.open_stateid = &state->stateid;
3744 data->arg.new_lock_owner = 1;
c1d51931 3745 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3746 } else
3747 data->arg.new_lock_owner = 0;
26e976a8 3748 data->timestamp = jiffies;
66179efe
AA		 3749 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3750 &data->res.seq_res, 1, task))
3751 return;
5138fde0 3752 rpc_call_start(task);
3110ff80 3753 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3754}
3755
3756static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3757{
3758 struct nfs4_lockdata *data = calldata;
3759
3110ff80 3760 dprintk("%s: begin!\n", __func__);
a5d16a4d 3761
66179efe
AA		 3762 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3763 task->tk_status);
3764
a5d16a4d
TM		 3765 data->rpc_status = task->tk_status;
3766 if (RPC_ASSASSINATED(task))
3767 goto out;
3768 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3769 if (data->rpc_status == 0)
3770 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3771 else
3772 goto out;
3773 }
3774 if (data->rpc_status == 0) {
3775 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3776 sizeof(data->lsp->ls_stateid.data));
3777 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3778 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3779 }
a5d16a4d 3780out:
3110ff80 3781 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3782}
3783
3784static void nfs4_lock_release(void *calldata)
3785{
3786 struct nfs4_lockdata *data = calldata;
3787
3110ff80 3788 dprintk("%s: begin!\n", __func__);
2f74c0a0 3789 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3790 if (data->cancelled != 0) {
3791 struct rpc_task *task;
3792 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3793 data->arg.lock_seqid);
3794 if (!IS_ERR(task))
e6b3c4db 3795 rpc_put_task(task);
3110ff80 3796 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3797 } else
3798 nfs_free_seqid(data->arg.lock_seqid);
3799 nfs4_put_lock_state(data->lsp);
3800 put_nfs_open_context(data->ctx);
3801 kfree(data);
3110ff80 3802 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3803}
3804
3805static const struct rpc_call_ops nfs4_lock_ops = {
3806 .rpc_call_prepare = nfs4_lock_prepare,
3807 .rpc_call_done = nfs4_lock_done,
3808 .rpc_release = nfs4_lock_release,
3809};
3810
3811static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3812{
3813 struct nfs4_lockdata *data;
3814 struct rpc_task *task;
5138fde0
TM		 3815 struct rpc_message msg = {
3816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3817 .rpc_cred = state->owner->so_cred,
3818 };
c970aa85
TM		 3819 struct rpc_task_setup task_setup_data = {
3820 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3821 .rpc_message = &msg,
c970aa85 3822 .callback_ops = &nfs4_lock_ops,
101070ca 3823 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3824 .flags = RPC_TASK_ASYNC,
3825 };
a5d16a4d
TM		 3826 int ret;
3827
3110ff80 3828 dprintk("%s: begin!\n", __func__);
cd3758e3 3829 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3830 fl->fl_u.nfs4_fl.owner);
3831 if (data == NULL)
3832 return -ENOMEM;
3833 if (IS_SETLKW(cmd))
3834 data->arg.block = 1;
3835 if (reclaim != 0)
3836 data->arg.reclaim = 1;
5138fde0
TM		 3837 msg.rpc_argp = &data->arg,
3838 msg.rpc_resp = &data->res,
c970aa85
TM		 3839 task_setup_data.callback_data = data;
3840 task = rpc_run_task(&task_setup_data);
7a1218a2 3841 if (IS_ERR(task))
a5d16a4d 3842 return PTR_ERR(task);
a5d16a4d
TM		 3843 ret = nfs4_wait_for_completion_rpc_task(task);
3844 if (ret == 0) {
3845 ret = data->rpc_status;
3846 if (ret == -NFS4ERR_DENIED)
3847 ret = -EAGAIN;
3848 } else
3849 data->cancelled = 1;
e6b3c4db 3850 rpc_put_task(task);
3110ff80 3851 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3852 return ret;
1da177e4
LT		 3853}
3854
3855static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3856{
202b50dc
TM		 3857 struct nfs_server *server = NFS_SERVER(state->inode);
3858 struct nfs4_exception exception = { };
3859 int err;
3860
3861 do {
42a2d13e
TM		 3862 /* Cache the lock if possible... */
3863 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3864 return 0;
202b50dc
TM		 3865 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3866 if (err != -NFS4ERR_DELAY)
3867 break;
3868 nfs4_handle_exception(server, err, &exception);
3869 } while (exception.retry);
3870 return err;
1da177e4
LT		 3871}
3872
3873static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3874{
202b50dc
TM		 3875 struct nfs_server *server = NFS_SERVER(state->inode);
3876 struct nfs4_exception exception = { };
3877 int err;
3878
6bfc93ef
TM		 3879 err = nfs4_set_lock_state(state, request);
3880 if (err != 0)
3881 return err;
202b50dc 3882 do {
42a2d13e
TM		 3883 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3884 return 0;
202b50dc
TM		 3885 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3886 if (err != -NFS4ERR_DELAY)
3887 break;
3888 nfs4_handle_exception(server, err, &exception);
3889 } while (exception.retry);
3890 return err;
1da177e4
LT		 3891}
3892
3893static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3894{
19e03c57 3895 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3896 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3897 int status;
3898
6bfc93ef 3899 /* Is this a delegated open? */
6bfc93ef
TM		 3900 status = nfs4_set_lock_state(state, request);
3901 if (status != 0)
3902 goto out;
01c3b861
TM		 3903 request->fl_flags |= FL_ACCESS;
3904 status = do_vfs_lock(request->fl_file, request);
3905 if (status < 0)
3906 goto out;
19e03c57 3907 down_read(&nfsi->rwsem);
01c3b861 3908 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3909 /* Yes: cache locks! */
01c3b861 3910 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3911 request->fl_flags = fl_flags & ~FL_SLEEP;
3912 status = do_vfs_lock(request->fl_file, request);
3913 goto out_unlock;
01c3b861 3914 }
6bfc93ef
TM		 3915 status = _nfs4_do_setlk(state, cmd, request, 0);
3916 if (status != 0)
01c3b861 3917 goto out_unlock;
6bfc93ef 3918 /* Note: we always want to sleep here! */
01c3b861 3919 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3920 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3921 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3922out_unlock:
19e03c57 3923 up_read(&nfsi->rwsem);
01c3b861
TM		 3924out:
3925 request->fl_flags = fl_flags;
1da177e4
LT		 3926 return status;
3927}
3928
3929static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3930{
3931 struct nfs4_exception exception = { };
3932 int err;
3933
3934 do {
3935 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3936 _nfs4_proc_setlk(state, cmd, request),
3937 &exception);
3938 } while (exception.retry);
3939 return err;
3940}
3941
3942static int
3943nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3944{
3945 struct nfs_open_context *ctx;
3946 struct nfs4_state *state;
3947 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3948 int status;
3949
3950 /* verify open state */
cd3758e3 3951 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3952 state = ctx->state;
3953
3954 if (request->fl_start < 0 || request->fl_end < 0)
3955 return -EINVAL;
3956
3957 if (IS_GETLK(cmd))
3958 return nfs4_proc_getlk(state, F_GETLK, request);
3959
3960 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3961 return -EINVAL;
3962
3963 if (request->fl_type == F_UNLCK)
3964 return nfs4_proc_unlck(state, cmd, request);
3965
3966 do {
3967 status = nfs4_proc_setlk(state, cmd, request);
3968 if ((status != -EAGAIN) || IS_SETLK(cmd))
3969 break;
3970 timeout = nfs4_set_lock_task_retry(timeout);
3971 status = -ERESTARTSYS;
3972 if (signalled())
3973 break;
3974 } while(status < 0);
1da177e4
LT		 3975 return status;
3976}
3977
888e694c
TM		 3978int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3979{
3980 struct nfs_server *server = NFS_SERVER(state->inode);
3981 struct nfs4_exception exception = { };
3982 int err;
3983
3984 err = nfs4_set_lock_state(state, fl);
3985 if (err != 0)
3986 goto out;
3987 do {
3988 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3989 if (err != -NFS4ERR_DELAY)
3990 break;
3991 err = nfs4_handle_exception(server, err, &exception);
3992 } while (exception.retry);
3993out:
3994 return err;
3995}
6b3b5496 3996
aa1870af
BF		 3997#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3998
6b3b5496
BF		 3999int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4000 size_t buflen, int flags)
4001{
4b580ee3
BF		 4002 struct inode *inode = dentry->d_inode;
4003
4004 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4005 return -EOPNOTSUPP;
4006
4b580ee3 4007 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4008}
4009
4010/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4011 * and that's what we'll do for e.g. user attributes that haven't been set.
4012 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4013 * attributes in kernel-managed attribute namespaces. */
4014ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4015 size_t buflen)
4016{
aa1870af
BF		 4017 struct inode *inode = dentry->d_inode;
4018
4019 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4020 return -EOPNOTSUPP;
4021
4022 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4023}
4024
4025ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4026{
aa1870af 4027 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4028
096455a2
BF		 4029 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4030 return 0;
6b3b5496
BF		 4031 if (buf && buflen < len)
4032 return -ERANGE;
4033 if (buf)
aa1870af
BF		 4034 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4035 return len;
6b3b5496
BF		 4036}
4037
69aaaae1
TM		 4038static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4039{
4040 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4041 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4042 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4043 return;
4044
4045 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4046 NFS_ATTR_FATTR_NLINK;
4047 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4048 fattr->nlink = 2;
4049}
4050
56659e99 4051int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4052 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4053{
4054 struct nfs_server *server = NFS_SERVER(dir);
4055 u32 bitmask[2] = {
361e624f
MN		 4056 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4057 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4058 };
4059 struct nfs4_fs_locations_arg args = {
4060 .dir_fh = NFS_FH(dir),
c228fd3a 4061 .name = name,
683b57b4
TM		 4062 .page = page,
4063 .bitmask = bitmask,
4064 };
22958463
BH		 4065 struct nfs4_fs_locations_res res = {
4066 .fs_locations = fs_locations,
4067 };
683b57b4
TM		 4068 struct rpc_message msg = {
4069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4070 .rpc_argp = &args,
22958463 4071 .rpc_resp = &res,
683b57b4
TM		 4072 };
4073 int status;
4074
3110ff80 4075 dprintk("%s: start\n", __func__);
c228fd3a 4076 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4077 fs_locations->server = server;
830b8e33 4078 fs_locations->nlocations = 0;
cccef3b9 4079 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4080 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4081 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4082 return status;
4083}
4084
557134a3
AA		 4085#ifdef CONFIG_NFS_V4_1
4086/* Destroy the slot table */
4087static void nfs4_destroy_slot_table(struct nfs4_session *session)
4088{
4089 if (session->fc_slot_table.slots == NULL)
4090 return;
4091 kfree(session->fc_slot_table.slots);
4092 session->fc_slot_table.slots = NULL;
4093 return;
4094}
4095
4096struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4097{
4098 struct nfs4_session *session;
4099 struct nfs4_slot_table *tbl;
4100
4101 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4102 if (!session)
4103 return NULL;
4104 tbl = &session->fc_slot_table;
4105 spin_lock_init(&tbl->slot_tbl_lock);
4106 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4107 session->clp = clp;
4108 return session;
4109}
4110
4111void nfs4_destroy_session(struct nfs4_session *session)
4112{
4113 nfs4_destroy_slot_table(session);
4114 kfree(session);
4115}
4116
4117#endif /* CONFIG_NFS_V4_1 */
4118
1da177e4 4119struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 4120 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4121 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4122 .recover_open = nfs4_open_reclaim,
4123 .recover_lock = nfs4_lock_reclaim,
4124};
4125
b79a4a1b 4126struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 4127 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4128 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4129 .recover_open = nfs4_open_expired,
4130 .recover_lock = nfs4_lock_expired,
4131};
4132
92e1d5be 4133static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4134 .permission = nfs_permission,
4135 .getattr = nfs_getattr,
4136 .setattr = nfs_setattr,
4137 .getxattr = nfs4_getxattr,
4138 .setxattr = nfs4_setxattr,
4139 .listxattr = nfs4_listxattr,
4140};
4141
509de811 4142const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4143 .version = 4, /* protocol version */
4144 .dentry_ops = &nfs4_dentry_operations,
4145 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4146 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4147 .getroot = nfs4_proc_get_root,
4148 .getattr = nfs4_proc_getattr,
4149 .setattr = nfs4_proc_setattr,
2b3de441 4150 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4151 .lookup = nfs4_proc_lookup,
4152 .access = nfs4_proc_access,
4153 .readlink = nfs4_proc_readlink,
1da177e4
LT		 4154 .create = nfs4_proc_create,
4155 .remove = nfs4_proc_remove,
4156 .unlink_setup = nfs4_proc_unlink_setup,
4157 .unlink_done = nfs4_proc_unlink_done,
4158 .rename = nfs4_proc_rename,
4159 .link = nfs4_proc_link,
4160 .symlink = nfs4_proc_symlink,
4161 .mkdir = nfs4_proc_mkdir,
4162 .rmdir = nfs4_proc_remove,
4163 .readdir = nfs4_proc_readdir,
4164 .mknod = nfs4_proc_mknod,
4165 .statfs = nfs4_proc_statfs,
4166 .fsinfo = nfs4_proc_fsinfo,
4167 .pathconf = nfs4_proc_pathconf,
e9326dca 4168 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 4169 .decode_dirent = nfs4_decode_dirent,
4170 .read_setup = nfs4_proc_read_setup,
ec06c096 4171 .read_done = nfs4_read_done,
1da177e4 4172 .write_setup = nfs4_proc_write_setup,
788e7a89 4173 .write_done = nfs4_write_done,
1da177e4 4174 .commit_setup = nfs4_proc_commit_setup,
788e7a89 4175 .commit_done = nfs4_commit_done,
1da177e4 4176 .lock = nfs4_proc_lock,
e50a1c2e 4177 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 4178 .close_context = nfs4_close_context,
1da177e4
LT		 4179};
4180
4181/*
4182 * Local variables:
4183 * c-basic-offset: 8
4184 * End:
4185 */
Linux 6.x block layer and io_uring tree(s)