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