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/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
52
53 #include "nfs4_fs.h"
54 #include "delegation.h"
55 #include "internal.h"
56 #include "iostat.h"
57 #include "callback.h"
58
59 #define NFSDBG_FACILITY NFSDBG_PROC
60
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
63
64 struct nfs4_opendata;
65 static int _nfs4_proc_open(struct nfs4_opendata *data);
66 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
67 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70
71 /* Prevent leaks of NFSv4 errors into userland */
72 static int nfs4_map_errors(int err)
73 {
74 if (err >= -1000)
75 return err;
76 switch (err) {
77 case -NFS4ERR_RESOURCE:
78 return -EREMOTEIO;
79 default:
80 dprintk("%s could not handle NFSv4 error %d\n",
81 __func__, -err);
82 break;
83 }
84 return -EIO;
85 }
86
87 /*
88 * This is our standard bitmap for GETATTR requests.
89 */
90 const u32 nfs4_fattr_bitmap[2] = {
91 FATTR4_WORD0_TYPE
92 | FATTR4_WORD0_CHANGE
93 | FATTR4_WORD0_SIZE
94 | FATTR4_WORD0_FSID
95 | FATTR4_WORD0_FILEID,
96 FATTR4_WORD1_MODE
97 | FATTR4_WORD1_NUMLINKS
98 | FATTR4_WORD1_OWNER
99 | FATTR4_WORD1_OWNER_GROUP
100 | FATTR4_WORD1_RAWDEV
101 | FATTR4_WORD1_SPACE_USED
102 | FATTR4_WORD1_TIME_ACCESS
103 | FATTR4_WORD1_TIME_METADATA
104 | FATTR4_WORD1_TIME_MODIFY
105 };
106
107 const u32 nfs4_statfs_bitmap[2] = {
108 FATTR4_WORD0_FILES_AVAIL
109 | FATTR4_WORD0_FILES_FREE
110 | FATTR4_WORD0_FILES_TOTAL,
111 FATTR4_WORD1_SPACE_AVAIL
112 | FATTR4_WORD1_SPACE_FREE
113 | FATTR4_WORD1_SPACE_TOTAL
114 };
115
116 const u32 nfs4_pathconf_bitmap[2] = {
117 FATTR4_WORD0_MAXLINK
118 | FATTR4_WORD0_MAXNAME,
119 0
120 };
121
122 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
123 | FATTR4_WORD0_MAXREAD
124 | FATTR4_WORD0_MAXWRITE
125 | FATTR4_WORD0_LEASE_TIME,
126 0
127 };
128
129 const u32 nfs4_fs_locations_bitmap[2] = {
130 FATTR4_WORD0_TYPE
131 | FATTR4_WORD0_CHANGE
132 | FATTR4_WORD0_SIZE
133 | FATTR4_WORD0_FSID
134 | FATTR4_WORD0_FILEID
135 | FATTR4_WORD0_FS_LOCATIONS,
136 FATTR4_WORD1_MODE
137 | FATTR4_WORD1_NUMLINKS
138 | FATTR4_WORD1_OWNER
139 | FATTR4_WORD1_OWNER_GROUP
140 | FATTR4_WORD1_RAWDEV
141 | FATTR4_WORD1_SPACE_USED
142 | FATTR4_WORD1_TIME_ACCESS
143 | FATTR4_WORD1_TIME_METADATA
144 | FATTR4_WORD1_TIME_MODIFY
145 | FATTR4_WORD1_MOUNTED_ON_FILEID
146 };
147
148 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
149 struct nfs4_readdir_arg *readdir)
150 {
151 __be32 *start, *p;
152
153 BUG_ON(readdir->count < 80);
154 if (cookie > 2) {
155 readdir->cookie = cookie;
156 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
157 return;
158 }
159
160 readdir->cookie = 0;
161 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
162 if (cookie == 2)
163 return;
164
165 /*
166 * NFSv4 servers do not return entries for '.' and '..'
167 * Therefore, we fake these entries here. We let '.'
168 * have cookie 0 and '..' have cookie 1. Note that
169 * when talking to the server, we always send cookie 0
170 * instead of 1 or 2.
171 */
172 start = p = kmap_atomic(*readdir->pages, KM_USER0);
173
174 if (cookie == 0) {
175 *p++ = xdr_one; /* next */
176 *p++ = xdr_zero; /* cookie, first word */
177 *p++ = xdr_one; /* cookie, second word */
178 *p++ = xdr_one; /* entry len */
179 memcpy(p, ".\0\0\0", 4); /* entry */
180 p++;
181 *p++ = xdr_one; /* bitmap length */
182 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
183 *p++ = htonl(8); /* attribute buffer length */
184 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
185 }
186
187 *p++ = xdr_one; /* next */
188 *p++ = xdr_zero; /* cookie, first word */
189 *p++ = xdr_two; /* cookie, second word */
190 *p++ = xdr_two; /* entry len */
191 memcpy(p, "..\0\0", 4); /* entry */
192 p++;
193 *p++ = xdr_one; /* bitmap length */
194 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
195 *p++ = htonl(8); /* attribute buffer length */
196 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
197
198 readdir->pgbase = (char *)p - (char *)start;
199 readdir->count -= readdir->pgbase;
200 kunmap_atomic(start, KM_USER0);
201 }
202
203 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
204 {
205 int res;
206
207 might_sleep();
208
209 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
210 nfs_wait_bit_killable, TASK_KILLABLE);
211 return res;
212 }
213
214 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
215 {
216 int res = 0;
217
218 might_sleep();
219
220 if (*timeout <= 0)
221 *timeout = NFS4_POLL_RETRY_MIN;
222 if (*timeout > NFS4_POLL_RETRY_MAX)
223 *timeout = NFS4_POLL_RETRY_MAX;
224 schedule_timeout_killable(*timeout);
225 if (fatal_signal_pending(current))
226 res = -ERESTARTSYS;
227 *timeout <<= 1;
228 return res;
229 }
230
231 /* This is the error handling routine for processes that are allowed
232 * to sleep.
233 */
234 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
235 {
236 struct nfs_client *clp = server->nfs_client;
237 struct nfs4_state *state = exception->state;
238 int ret = errorcode;
239
240 exception->retry = 0;
241 switch(errorcode) {
242 case 0:
243 return 0;
244 case -NFS4ERR_ADMIN_REVOKED:
245 case -NFS4ERR_BAD_STATEID:
246 case -NFS4ERR_OPENMODE:
247 if (state == NULL)
248 break;
249 nfs4_state_mark_reclaim_nograce(clp, state);
250 case -NFS4ERR_STALE_CLIENTID:
251 case -NFS4ERR_STALE_STATEID:
252 case -NFS4ERR_EXPIRED:
253 nfs4_schedule_state_recovery(clp);
254 ret = nfs4_wait_clnt_recover(clp);
255 if (ret == 0)
256 exception->retry = 1;
257 #if !defined(CONFIG_NFS_V4_1)
258 break;
259 #else /* !defined(CONFIG_NFS_V4_1) */
260 if (!nfs4_has_session(server->nfs_client))
261 break;
262 /* FALLTHROUGH */
263 case -NFS4ERR_BADSESSION:
264 case -NFS4ERR_BADSLOT:
265 case -NFS4ERR_BAD_HIGH_SLOT:
266 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
267 case -NFS4ERR_DEADSESSION:
268 case -NFS4ERR_SEQ_FALSE_RETRY:
269 case -NFS4ERR_SEQ_MISORDERED:
270 dprintk("%s ERROR: %d Reset session\n", __func__,
271 errorcode);
272 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
273 exception->retry = 1;
274 /* FALLTHROUGH */
275 #endif /* !defined(CONFIG_NFS_V4_1) */
276 case -NFS4ERR_FILE_OPEN:
277 case -NFS4ERR_GRACE:
278 case -NFS4ERR_DELAY:
279 ret = nfs4_delay(server->client, &exception->timeout);
280 if (ret != 0)
281 break;
282 case -NFS4ERR_OLD_STATEID:
283 exception->retry = 1;
284 }
285 /* We failed to handle the error */
286 return nfs4_map_errors(ret);
287 }
288
289
290 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
291 {
292 struct nfs_client *clp = server->nfs_client;
293 spin_lock(&clp->cl_lock);
294 if (time_before(clp->cl_last_renewal,timestamp))
295 clp->cl_last_renewal = timestamp;
296 spin_unlock(&clp->cl_lock);
297 }
298
299 #if defined(CONFIG_NFS_V4_1)
300
301 /*
302 * nfs4_free_slot - free a slot and efficiently update slot table.
303 *
304 * freeing a slot is trivially done by clearing its respective bit
305 * in the bitmap.
306 * If the freed slotid equals highest_used_slotid we want to update it
307 * so that the server would be able to size down the slot table if needed,
308 * otherwise we know that the highest_used_slotid is still in use.
309 * When updating highest_used_slotid there may be "holes" in the bitmap
310 * so we need to scan down from highest_used_slotid to 0 looking for the now
311 * highest slotid in use.
312 * If none found, highest_used_slotid is set to -1.
313 */
314 static void
315 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
316 {
317 int slotid = free_slotid;
318
319 spin_lock(&tbl->slot_tbl_lock);
320 /* clear used bit in bitmap */
321 __clear_bit(slotid, tbl->used_slots);
322
323 /* update highest_used_slotid when it is freed */
324 if (slotid == tbl->highest_used_slotid) {
325 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
326 if (slotid >= 0 && slotid < tbl->max_slots)
327 tbl->highest_used_slotid = slotid;
328 else
329 tbl->highest_used_slotid = -1;
330 }
331 rpc_wake_up_next(&tbl->slot_tbl_waitq);
332 spin_unlock(&tbl->slot_tbl_lock);
333 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
334 free_slotid, tbl->highest_used_slotid);
335 }
336
337 void nfs41_sequence_free_slot(const struct nfs_client *clp,
338 struct nfs4_sequence_res *res)
339 {
340 struct nfs4_slot_table *tbl;
341
342 if (!nfs4_has_session(clp)) {
343 dprintk("%s: No session\n", __func__);
344 return;
345 }
346 tbl = &clp->cl_session->fc_slot_table;
347 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
348 dprintk("%s: No slot\n", __func__);
349 /* just wake up the next guy waiting since
350 * we may have not consumed a slot after all */
351 rpc_wake_up_next(&tbl->slot_tbl_waitq);
352 return;
353 }
354 nfs4_free_slot(tbl, res->sr_slotid);
355 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
356 }
357
358 static void nfs41_sequence_done(struct nfs_client *clp,
359 struct nfs4_sequence_res *res,
360 int rpc_status)
361 {
362 unsigned long timestamp;
363 struct nfs4_slot_table *tbl;
364 struct nfs4_slot *slot;
365
366 /*
367 * sr_status remains 1 if an RPC level error occurred. The server
368 * may or may not have processed the sequence operation..
369 * Proceed as if the server received and processed the sequence
370 * operation.
371 */
372 if (res->sr_status == 1)
373 res->sr_status = NFS_OK;
374
375 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
376 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
377 goto out;
378
379 tbl = &clp->cl_session->fc_slot_table;
380 slot = tbl->slots + res->sr_slotid;
381
382 if (res->sr_status == 0) {
383 /* Update the slot's sequence and clientid lease timer */
384 ++slot->seq_nr;
385 timestamp = res->sr_renewal_time;
386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal, timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
390 return;
391 }
392 out:
393 /* The session may be reset by one of the error handlers. */
394 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
395 nfs41_sequence_free_slot(clp, res);
396 }
397
398 /*
399 * nfs4_find_slot - efficiently look for a free slot
400 *
401 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
402 * If found, we mark the slot as used, update the highest_used_slotid,
403 * and respectively set up the sequence operation args.
404 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
405 *
406 * Note: must be called with under the slot_tbl_lock.
407 */
408 static u8
409 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
410 {
411 int slotid;
412 u8 ret_id = NFS4_MAX_SLOT_TABLE;
413 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
414
415 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
416 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
417 tbl->max_slots);
418 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
419 if (slotid >= tbl->max_slots)
420 goto out;
421 __set_bit(slotid, tbl->used_slots);
422 if (slotid > tbl->highest_used_slotid)
423 tbl->highest_used_slotid = slotid;
424 ret_id = slotid;
425 out:
426 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
427 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
428 return ret_id;
429 }
430
431 static int nfs4_recover_session(struct nfs4_session *session)
432 {
433 struct nfs_client *clp = session->clp;
434 int ret;
435
436 for (;;) {
437 ret = nfs4_wait_clnt_recover(clp);
438 if (ret != 0)
439 return ret;
440 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
441 break;
442 nfs4_schedule_state_manager(clp);
443 }
444 return 0;
445 }
446
447 static int nfs41_setup_sequence(struct nfs4_session *session,
448 struct nfs4_sequence_args *args,
449 struct nfs4_sequence_res *res,
450 int cache_reply,
451 struct rpc_task *task)
452 {
453 struct nfs4_slot *slot;
454 struct nfs4_slot_table *tbl;
455 int status = 0;
456 u8 slotid;
457
458 dprintk("--> %s\n", __func__);
459 /* slot already allocated? */
460 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
461 return 0;
462
463 memset(res, 0, sizeof(*res));
464 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
465 tbl = &session->fc_slot_table;
466
467 spin_lock(&tbl->slot_tbl_lock);
468 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
469 if (tbl->highest_used_slotid != -1) {
470 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
471 spin_unlock(&tbl->slot_tbl_lock);
472 dprintk("<-- %s: Session reset: draining\n", __func__);
473 return -EAGAIN;
474 }
475
476 /* The slot table is empty; start the reset thread */
477 dprintk("%s Session Reset\n", __func__);
478 spin_unlock(&tbl->slot_tbl_lock);
479 status = nfs4_recover_session(session);
480 if (status)
481 return status;
482 spin_lock(&tbl->slot_tbl_lock);
483 }
484
485 slotid = nfs4_find_slot(tbl, task);
486 if (slotid == NFS4_MAX_SLOT_TABLE) {
487 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
488 spin_unlock(&tbl->slot_tbl_lock);
489 dprintk("<-- %s: no free slots\n", __func__);
490 return -EAGAIN;
491 }
492 spin_unlock(&tbl->slot_tbl_lock);
493
494 slot = tbl->slots + slotid;
495 args->sa_session = session;
496 args->sa_slotid = slotid;
497 args->sa_cache_this = cache_reply;
498
499 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
500
501 res->sr_session = session;
502 res->sr_slotid = slotid;
503 res->sr_renewal_time = jiffies;
504 /*
505 * sr_status is only set in decode_sequence, and so will remain
506 * set to 1 if an rpc level failure occurs.
507 */
508 res->sr_status = 1;
509 return 0;
510 }
511
512 int nfs4_setup_sequence(struct nfs_client *clp,
513 struct nfs4_sequence_args *args,
514 struct nfs4_sequence_res *res,
515 int cache_reply,
516 struct rpc_task *task)
517 {
518 int ret = 0;
519
520 dprintk("--> %s clp %p session %p sr_slotid %d\n",
521 __func__, clp, clp->cl_session, res->sr_slotid);
522
523 if (!nfs4_has_session(clp))
524 goto out;
525 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
526 task);
527 if (ret != -EAGAIN) {
528 /* terminate rpc task */
529 task->tk_status = ret;
530 task->tk_action = NULL;
531 }
532 out:
533 dprintk("<-- %s status=%d\n", __func__, ret);
534 return ret;
535 }
536
537 struct nfs41_call_sync_data {
538 struct nfs_client *clp;
539 struct nfs4_sequence_args *seq_args;
540 struct nfs4_sequence_res *seq_res;
541 int cache_reply;
542 };
543
544 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
545 {
546 struct nfs41_call_sync_data *data = calldata;
547
548 dprintk("--> %s data->clp->cl_session %p\n", __func__,
549 data->clp->cl_session);
550 if (nfs4_setup_sequence(data->clp, data->seq_args,
551 data->seq_res, data->cache_reply, task))
552 return;
553 rpc_call_start(task);
554 }
555
556 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
557 {
558 struct nfs41_call_sync_data *data = calldata;
559
560 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
561 nfs41_sequence_free_slot(data->clp, data->seq_res);
562 }
563
564 struct rpc_call_ops nfs41_call_sync_ops = {
565 .rpc_call_prepare = nfs41_call_sync_prepare,
566 .rpc_call_done = nfs41_call_sync_done,
567 };
568
569 static int nfs4_call_sync_sequence(struct nfs_client *clp,
570 struct rpc_clnt *clnt,
571 struct rpc_message *msg,
572 struct nfs4_sequence_args *args,
573 struct nfs4_sequence_res *res,
574 int cache_reply)
575 {
576 int ret;
577 struct rpc_task *task;
578 struct nfs41_call_sync_data data = {
579 .clp = clp,
580 .seq_args = args,
581 .seq_res = res,
582 .cache_reply = cache_reply,
583 };
584 struct rpc_task_setup task_setup = {
585 .rpc_client = clnt,
586 .rpc_message = msg,
587 .callback_ops = &nfs41_call_sync_ops,
588 .callback_data = &data
589 };
590
591 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
592 task = rpc_run_task(&task_setup);
593 if (IS_ERR(task))
594 ret = PTR_ERR(task);
595 else {
596 ret = task->tk_status;
597 rpc_put_task(task);
598 }
599 return ret;
600 }
601
602 int _nfs4_call_sync_session(struct nfs_server *server,
603 struct rpc_message *msg,
604 struct nfs4_sequence_args *args,
605 struct nfs4_sequence_res *res,
606 int cache_reply)
607 {
608 return nfs4_call_sync_sequence(server->nfs_client, server->client,
609 msg, args, res, cache_reply);
610 }
611
612 #endif /* CONFIG_NFS_V4_1 */
613
614 int _nfs4_call_sync(struct nfs_server *server,
615 struct rpc_message *msg,
616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
618 int cache_reply)
619 {
620 args->sa_session = res->sr_session = NULL;
621 return rpc_call_sync(server->client, msg, 0);
622 }
623
624 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
625 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
626 &(res)->seq_res, (cache_reply))
627
628 static void nfs4_sequence_done(const struct nfs_server *server,
629 struct nfs4_sequence_res *res, int rpc_status)
630 {
631 #ifdef CONFIG_NFS_V4_1
632 if (nfs4_has_session(server->nfs_client))
633 nfs41_sequence_done(server->nfs_client, res, rpc_status);
634 #endif /* CONFIG_NFS_V4_1 */
635 }
636
637 /* no restart, therefore free slot here */
638 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
639 struct nfs4_sequence_res *res,
640 int rpc_status)
641 {
642 nfs4_sequence_done(server, res, rpc_status);
643 nfs4_sequence_free_slot(server->nfs_client, res);
644 }
645
646 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
647 {
648 struct nfs_inode *nfsi = NFS_I(dir);
649
650 spin_lock(&dir->i_lock);
651 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
652 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
653 nfs_force_lookup_revalidate(dir);
654 nfsi->change_attr = cinfo->after;
655 spin_unlock(&dir->i_lock);
656 }
657
658 struct nfs4_opendata {
659 struct kref kref;
660 struct nfs_openargs o_arg;
661 struct nfs_openres o_res;
662 struct nfs_open_confirmargs c_arg;
663 struct nfs_open_confirmres c_res;
664 struct nfs_fattr f_attr;
665 struct nfs_fattr dir_attr;
666 struct path path;
667 struct dentry *dir;
668 struct nfs4_state_owner *owner;
669 struct nfs4_state *state;
670 struct iattr attrs;
671 unsigned long timestamp;
672 unsigned int rpc_done : 1;
673 int rpc_status;
674 int cancelled;
675 };
676
677
678 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
679 {
680 p->o_res.f_attr = &p->f_attr;
681 p->o_res.dir_attr = &p->dir_attr;
682 p->o_res.seqid = p->o_arg.seqid;
683 p->c_res.seqid = p->c_arg.seqid;
684 p->o_res.server = p->o_arg.server;
685 nfs_fattr_init(&p->f_attr);
686 nfs_fattr_init(&p->dir_attr);
687 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
688 }
689
690 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
691 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
692 const struct iattr *attrs)
693 {
694 struct dentry *parent = dget_parent(path->dentry);
695 struct inode *dir = parent->d_inode;
696 struct nfs_server *server = NFS_SERVER(dir);
697 struct nfs4_opendata *p;
698
699 p = kzalloc(sizeof(*p), GFP_KERNEL);
700 if (p == NULL)
701 goto err;
702 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
703 if (p->o_arg.seqid == NULL)
704 goto err_free;
705 p->path.mnt = mntget(path->mnt);
706 p->path.dentry = dget(path->dentry);
707 p->dir = parent;
708 p->owner = sp;
709 atomic_inc(&sp->so_count);
710 p->o_arg.fh = NFS_FH(dir);
711 p->o_arg.open_flags = flags;
712 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
713 p->o_arg.clientid = server->nfs_client->cl_clientid;
714 p->o_arg.id = sp->so_owner_id.id;
715 p->o_arg.name = &p->path.dentry->d_name;
716 p->o_arg.server = server;
717 p->o_arg.bitmask = server->attr_bitmask;
718 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
719 if (flags & O_EXCL) {
720 u32 *s = (u32 *) p->o_arg.u.verifier.data;
721 s[0] = jiffies;
722 s[1] = current->pid;
723 } else if (flags & O_CREAT) {
724 p->o_arg.u.attrs = &p->attrs;
725 memcpy(&p->attrs, attrs, sizeof(p->attrs));
726 }
727 p->c_arg.fh = &p->o_res.fh;
728 p->c_arg.stateid = &p->o_res.stateid;
729 p->c_arg.seqid = p->o_arg.seqid;
730 nfs4_init_opendata_res(p);
731 kref_init(&p->kref);
732 return p;
733 err_free:
734 kfree(p);
735 err:
736 dput(parent);
737 return NULL;
738 }
739
740 static void nfs4_opendata_free(struct kref *kref)
741 {
742 struct nfs4_opendata *p = container_of(kref,
743 struct nfs4_opendata, kref);
744
745 nfs_free_seqid(p->o_arg.seqid);
746 if (p->state != NULL)
747 nfs4_put_open_state(p->state);
748 nfs4_put_state_owner(p->owner);
749 dput(p->dir);
750 path_put(&p->path);
751 kfree(p);
752 }
753
754 static void nfs4_opendata_put(struct nfs4_opendata *p)
755 {
756 if (p != NULL)
757 kref_put(&p->kref, nfs4_opendata_free);
758 }
759
760 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
761 {
762 int ret;
763
764 ret = rpc_wait_for_completion_task(task);
765 return ret;
766 }
767
768 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
769 {
770 int ret = 0;
771
772 if (open_mode & O_EXCL)
773 goto out;
774 switch (mode & (FMODE_READ|FMODE_WRITE)) {
775 case FMODE_READ:
776 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
777 break;
778 case FMODE_WRITE:
779 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
780 break;
781 case FMODE_READ|FMODE_WRITE:
782 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
783 }
784 out:
785 return ret;
786 }
787
788 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
789 {
790 if ((delegation->type & fmode) != fmode)
791 return 0;
792 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
793 return 0;
794 nfs_mark_delegation_referenced(delegation);
795 return 1;
796 }
797
798 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
799 {
800 switch (fmode) {
801 case FMODE_WRITE:
802 state->n_wronly++;
803 break;
804 case FMODE_READ:
805 state->n_rdonly++;
806 break;
807 case FMODE_READ|FMODE_WRITE:
808 state->n_rdwr++;
809 }
810 nfs4_state_set_mode_locked(state, state->state | fmode);
811 }
812
813 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
814 {
815 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
816 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
817 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
818 switch (fmode) {
819 case FMODE_READ:
820 set_bit(NFS_O_RDONLY_STATE, &state->flags);
821 break;
822 case FMODE_WRITE:
823 set_bit(NFS_O_WRONLY_STATE, &state->flags);
824 break;
825 case FMODE_READ|FMODE_WRITE:
826 set_bit(NFS_O_RDWR_STATE, &state->flags);
827 }
828 }
829
830 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
831 {
832 write_seqlock(&state->seqlock);
833 nfs_set_open_stateid_locked(state, stateid, fmode);
834 write_sequnlock(&state->seqlock);
835 }
836
837 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
838 {
839 /*
840 * Protect the call to nfs4_state_set_mode_locked and
841 * serialise the stateid update
842 */
843 write_seqlock(&state->seqlock);
844 if (deleg_stateid != NULL) {
845 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
846 set_bit(NFS_DELEGATED_STATE, &state->flags);
847 }
848 if (open_stateid != NULL)
849 nfs_set_open_stateid_locked(state, open_stateid, fmode);
850 write_sequnlock(&state->seqlock);
851 spin_lock(&state->owner->so_lock);
852 update_open_stateflags(state, fmode);
853 spin_unlock(&state->owner->so_lock);
854 }
855
856 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
857 {
858 struct nfs_inode *nfsi = NFS_I(state->inode);
859 struct nfs_delegation *deleg_cur;
860 int ret = 0;
861
862 fmode &= (FMODE_READ|FMODE_WRITE);
863
864 rcu_read_lock();
865 deleg_cur = rcu_dereference(nfsi->delegation);
866 if (deleg_cur == NULL)
867 goto no_delegation;
868
869 spin_lock(&deleg_cur->lock);
870 if (nfsi->delegation != deleg_cur ||
871 (deleg_cur->type & fmode) != fmode)
872 goto no_delegation_unlock;
873
874 if (delegation == NULL)
875 delegation = &deleg_cur->stateid;
876 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
877 goto no_delegation_unlock;
878
879 nfs_mark_delegation_referenced(deleg_cur);
880 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
881 ret = 1;
882 no_delegation_unlock:
883 spin_unlock(&deleg_cur->lock);
884 no_delegation:
885 rcu_read_unlock();
886
887 if (!ret && open_stateid != NULL) {
888 __update_open_stateid(state, open_stateid, NULL, fmode);
889 ret = 1;
890 }
891
892 return ret;
893 }
894
895
896 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
897 {
898 struct nfs_delegation *delegation;
899
900 rcu_read_lock();
901 delegation = rcu_dereference(NFS_I(inode)->delegation);
902 if (delegation == NULL || (delegation->type & fmode) == fmode) {
903 rcu_read_unlock();
904 return;
905 }
906 rcu_read_unlock();
907 nfs_inode_return_delegation(inode);
908 }
909
910 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
911 {
912 struct nfs4_state *state = opendata->state;
913 struct nfs_inode *nfsi = NFS_I(state->inode);
914 struct nfs_delegation *delegation;
915 int open_mode = opendata->o_arg.open_flags & O_EXCL;
916 fmode_t fmode = opendata->o_arg.fmode;
917 nfs4_stateid stateid;
918 int ret = -EAGAIN;
919
920 for (;;) {
921 if (can_open_cached(state, fmode, open_mode)) {
922 spin_lock(&state->owner->so_lock);
923 if (can_open_cached(state, fmode, open_mode)) {
924 update_open_stateflags(state, fmode);
925 spin_unlock(&state->owner->so_lock);
926 goto out_return_state;
927 }
928 spin_unlock(&state->owner->so_lock);
929 }
930 rcu_read_lock();
931 delegation = rcu_dereference(nfsi->delegation);
932 if (delegation == NULL ||
933 !can_open_delegated(delegation, fmode)) {
934 rcu_read_unlock();
935 break;
936 }
937 /* Save the delegation */
938 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
939 rcu_read_unlock();
940 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
941 if (ret != 0)
942 goto out;
943 ret = -EAGAIN;
944
945 /* Try to update the stateid using the delegation */
946 if (update_open_stateid(state, NULL, &stateid, fmode))
947 goto out_return_state;
948 }
949 out:
950 return ERR_PTR(ret);
951 out_return_state:
952 atomic_inc(&state->count);
953 return state;
954 }
955
956 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
957 {
958 struct inode *inode;
959 struct nfs4_state *state = NULL;
960 struct nfs_delegation *delegation;
961 int ret;
962
963 if (!data->rpc_done) {
964 state = nfs4_try_open_cached(data);
965 goto out;
966 }
967
968 ret = -EAGAIN;
969 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
970 goto err;
971 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
972 ret = PTR_ERR(inode);
973 if (IS_ERR(inode))
974 goto err;
975 ret = -ENOMEM;
976 state = nfs4_get_open_state(inode, data->owner);
977 if (state == NULL)
978 goto err_put_inode;
979 if (data->o_res.delegation_type != 0) {
980 int delegation_flags = 0;
981
982 rcu_read_lock();
983 delegation = rcu_dereference(NFS_I(inode)->delegation);
984 if (delegation)
985 delegation_flags = delegation->flags;
986 rcu_read_unlock();
987 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
988 nfs_inode_set_delegation(state->inode,
989 data->owner->so_cred,
990 &data->o_res);
991 else
992 nfs_inode_reclaim_delegation(state->inode,
993 data->owner->so_cred,
994 &data->o_res);
995 }
996
997 update_open_stateid(state, &data->o_res.stateid, NULL,
998 data->o_arg.fmode);
999 iput(inode);
1000 out:
1001 return state;
1002 err_put_inode:
1003 iput(inode);
1004 err:
1005 return ERR_PTR(ret);
1006 }
1007
1008 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1009 {
1010 struct nfs_inode *nfsi = NFS_I(state->inode);
1011 struct nfs_open_context *ctx;
1012
1013 spin_lock(&state->inode->i_lock);
1014 list_for_each_entry(ctx, &nfsi->open_files, list) {
1015 if (ctx->state != state)
1016 continue;
1017 get_nfs_open_context(ctx);
1018 spin_unlock(&state->inode->i_lock);
1019 return ctx;
1020 }
1021 spin_unlock(&state->inode->i_lock);
1022 return ERR_PTR(-ENOENT);
1023 }
1024
1025 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1026 {
1027 struct nfs4_opendata *opendata;
1028
1029 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1030 if (opendata == NULL)
1031 return ERR_PTR(-ENOMEM);
1032 opendata->state = state;
1033 atomic_inc(&state->count);
1034 return opendata;
1035 }
1036
1037 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1038 {
1039 struct nfs4_state *newstate;
1040 int ret;
1041
1042 opendata->o_arg.open_flags = 0;
1043 opendata->o_arg.fmode = fmode;
1044 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1045 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1046 nfs4_init_opendata_res(opendata);
1047 ret = _nfs4_proc_open(opendata);
1048 if (ret != 0)
1049 return ret;
1050 newstate = nfs4_opendata_to_nfs4_state(opendata);
1051 if (IS_ERR(newstate))
1052 return PTR_ERR(newstate);
1053 nfs4_close_state(&opendata->path, newstate, fmode);
1054 *res = newstate;
1055 return 0;
1056 }
1057
1058 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1059 {
1060 struct nfs4_state *newstate;
1061 int ret;
1062
1063 /* memory barrier prior to reading state->n_* */
1064 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1065 smp_rmb();
1066 if (state->n_rdwr != 0) {
1067 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1068 if (ret != 0)
1069 return ret;
1070 if (newstate != state)
1071 return -ESTALE;
1072 }
1073 if (state->n_wronly != 0) {
1074 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1075 if (ret != 0)
1076 return ret;
1077 if (newstate != state)
1078 return -ESTALE;
1079 }
1080 if (state->n_rdonly != 0) {
1081 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1082 if (ret != 0)
1083 return ret;
1084 if (newstate != state)
1085 return -ESTALE;
1086 }
1087 /*
1088 * We may have performed cached opens for all three recoveries.
1089 * Check if we need to update the current stateid.
1090 */
1091 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1092 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1093 write_seqlock(&state->seqlock);
1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1095 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1096 write_sequnlock(&state->seqlock);
1097 }
1098 return 0;
1099 }
1100
1101 /*
1102 * OPEN_RECLAIM:
1103 * reclaim state on the server after a reboot.
1104 */
1105 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1106 {
1107 struct nfs_delegation *delegation;
1108 struct nfs4_opendata *opendata;
1109 fmode_t delegation_type = 0;
1110 int status;
1111
1112 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1113 if (IS_ERR(opendata))
1114 return PTR_ERR(opendata);
1115 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1116 opendata->o_arg.fh = NFS_FH(state->inode);
1117 rcu_read_lock();
1118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1119 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1120 delegation_type = delegation->type;
1121 rcu_read_unlock();
1122 opendata->o_arg.u.delegation_type = delegation_type;
1123 status = nfs4_open_recover(opendata, state);
1124 nfs4_opendata_put(opendata);
1125 return status;
1126 }
1127
1128 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1129 {
1130 struct nfs_server *server = NFS_SERVER(state->inode);
1131 struct nfs4_exception exception = { };
1132 int err;
1133 do {
1134 err = _nfs4_do_open_reclaim(ctx, state);
1135 if (err != -NFS4ERR_DELAY)
1136 break;
1137 nfs4_handle_exception(server, err, &exception);
1138 } while (exception.retry);
1139 return err;
1140 }
1141
1142 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1143 {
1144 struct nfs_open_context *ctx;
1145 int ret;
1146
1147 ctx = nfs4_state_find_open_context(state);
1148 if (IS_ERR(ctx))
1149 return PTR_ERR(ctx);
1150 ret = nfs4_do_open_reclaim(ctx, state);
1151 put_nfs_open_context(ctx);
1152 return ret;
1153 }
1154
1155 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1156 {
1157 struct nfs4_opendata *opendata;
1158 int ret;
1159
1160 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1161 if (IS_ERR(opendata))
1162 return PTR_ERR(opendata);
1163 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1164 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1165 sizeof(opendata->o_arg.u.delegation.data));
1166 ret = nfs4_open_recover(opendata, state);
1167 nfs4_opendata_put(opendata);
1168 return ret;
1169 }
1170
1171 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1172 {
1173 struct nfs4_exception exception = { };
1174 struct nfs_server *server = NFS_SERVER(state->inode);
1175 int err;
1176 do {
1177 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1178 switch (err) {
1179 case 0:
1180 case -ENOENT:
1181 case -ESTALE:
1182 goto out;
1183 case -NFS4ERR_STALE_CLIENTID:
1184 case -NFS4ERR_STALE_STATEID:
1185 case -NFS4ERR_EXPIRED:
1186 /* Don't recall a delegation if it was lost */
1187 nfs4_schedule_state_recovery(server->nfs_client);
1188 goto out;
1189 case -ERESTARTSYS:
1190 /*
1191 * The show must go on: exit, but mark the
1192 * stateid as needing recovery.
1193 */
1194 case -NFS4ERR_ADMIN_REVOKED:
1195 case -NFS4ERR_BAD_STATEID:
1196 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1197 case -ENOMEM:
1198 err = 0;
1199 goto out;
1200 }
1201 err = nfs4_handle_exception(server, err, &exception);
1202 } while (exception.retry);
1203 out:
1204 return err;
1205 }
1206
1207 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1208 {
1209 struct nfs4_opendata *data = calldata;
1210
1211 data->rpc_status = task->tk_status;
1212 if (RPC_ASSASSINATED(task))
1213 return;
1214 if (data->rpc_status == 0) {
1215 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1216 sizeof(data->o_res.stateid.data));
1217 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1218 renew_lease(data->o_res.server, data->timestamp);
1219 data->rpc_done = 1;
1220 }
1221 }
1222
1223 static void nfs4_open_confirm_release(void *calldata)
1224 {
1225 struct nfs4_opendata *data = calldata;
1226 struct nfs4_state *state = NULL;
1227
1228 /* If this request hasn't been cancelled, do nothing */
1229 if (data->cancelled == 0)
1230 goto out_free;
1231 /* In case of error, no cleanup! */
1232 if (!data->rpc_done)
1233 goto out_free;
1234 state = nfs4_opendata_to_nfs4_state(data);
1235 if (!IS_ERR(state))
1236 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1237 out_free:
1238 nfs4_opendata_put(data);
1239 }
1240
1241 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1242 .rpc_call_done = nfs4_open_confirm_done,
1243 .rpc_release = nfs4_open_confirm_release,
1244 };
1245
1246 /*
1247 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1248 */
1249 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1250 {
1251 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1252 struct rpc_task *task;
1253 struct rpc_message msg = {
1254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1255 .rpc_argp = &data->c_arg,
1256 .rpc_resp = &data->c_res,
1257 .rpc_cred = data->owner->so_cred,
1258 };
1259 struct rpc_task_setup task_setup_data = {
1260 .rpc_client = server->client,
1261 .rpc_message = &msg,
1262 .callback_ops = &nfs4_open_confirm_ops,
1263 .callback_data = data,
1264 .workqueue = nfsiod_workqueue,
1265 .flags = RPC_TASK_ASYNC,
1266 };
1267 int status;
1268
1269 kref_get(&data->kref);
1270 data->rpc_done = 0;
1271 data->rpc_status = 0;
1272 data->timestamp = jiffies;
1273 task = rpc_run_task(&task_setup_data);
1274 if (IS_ERR(task))
1275 return PTR_ERR(task);
1276 status = nfs4_wait_for_completion_rpc_task(task);
1277 if (status != 0) {
1278 data->cancelled = 1;
1279 smp_wmb();
1280 } else
1281 status = data->rpc_status;
1282 rpc_put_task(task);
1283 return status;
1284 }
1285
1286 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1287 {
1288 struct nfs4_opendata *data = calldata;
1289 struct nfs4_state_owner *sp = data->owner;
1290
1291 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1292 return;
1293 /*
1294 * Check if we still need to send an OPEN call, or if we can use
1295 * a delegation instead.
1296 */
1297 if (data->state != NULL) {
1298 struct nfs_delegation *delegation;
1299
1300 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1301 goto out_no_action;
1302 rcu_read_lock();
1303 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1304 if (delegation != NULL &&
1305 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1306 rcu_read_unlock();
1307 goto out_no_action;
1308 }
1309 rcu_read_unlock();
1310 }
1311 /* Update sequence id. */
1312 data->o_arg.id = sp->so_owner_id.id;
1313 data->o_arg.clientid = sp->so_client->cl_clientid;
1314 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1315 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1316 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1317 }
1318 data->timestamp = jiffies;
1319 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1320 &data->o_arg.seq_args,
1321 &data->o_res.seq_res, 1, task))
1322 return;
1323 rpc_call_start(task);
1324 return;
1325 out_no_action:
1326 task->tk_action = NULL;
1327
1328 }
1329
1330 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1331 {
1332 struct nfs4_opendata *data = calldata;
1333
1334 data->rpc_status = task->tk_status;
1335
1336 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1337 task->tk_status);
1338
1339 if (RPC_ASSASSINATED(task))
1340 return;
1341 if (task->tk_status == 0) {
1342 switch (data->o_res.f_attr->mode & S_IFMT) {
1343 case S_IFREG:
1344 break;
1345 case S_IFLNK:
1346 data->rpc_status = -ELOOP;
1347 break;
1348 case S_IFDIR:
1349 data->rpc_status = -EISDIR;
1350 break;
1351 default:
1352 data->rpc_status = -ENOTDIR;
1353 }
1354 renew_lease(data->o_res.server, data->timestamp);
1355 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1356 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1357 }
1358 data->rpc_done = 1;
1359 }
1360
1361 static void nfs4_open_release(void *calldata)
1362 {
1363 struct nfs4_opendata *data = calldata;
1364 struct nfs4_state *state = NULL;
1365
1366 /* If this request hasn't been cancelled, do nothing */
1367 if (data->cancelled == 0)
1368 goto out_free;
1369 /* In case of error, no cleanup! */
1370 if (data->rpc_status != 0 || !data->rpc_done)
1371 goto out_free;
1372 /* In case we need an open_confirm, no cleanup! */
1373 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1374 goto out_free;
1375 state = nfs4_opendata_to_nfs4_state(data);
1376 if (!IS_ERR(state))
1377 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1378 out_free:
1379 nfs4_opendata_put(data);
1380 }
1381
1382 static const struct rpc_call_ops nfs4_open_ops = {
1383 .rpc_call_prepare = nfs4_open_prepare,
1384 .rpc_call_done = nfs4_open_done,
1385 .rpc_release = nfs4_open_release,
1386 };
1387
1388 /*
1389 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1390 */
1391 static int _nfs4_proc_open(struct nfs4_opendata *data)
1392 {
1393 struct inode *dir = data->dir->d_inode;
1394 struct nfs_server *server = NFS_SERVER(dir);
1395 struct nfs_openargs *o_arg = &data->o_arg;
1396 struct nfs_openres *o_res = &data->o_res;
1397 struct rpc_task *task;
1398 struct rpc_message msg = {
1399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1400 .rpc_argp = o_arg,
1401 .rpc_resp = o_res,
1402 .rpc_cred = data->owner->so_cred,
1403 };
1404 struct rpc_task_setup task_setup_data = {
1405 .rpc_client = server->client,
1406 .rpc_message = &msg,
1407 .callback_ops = &nfs4_open_ops,
1408 .callback_data = data,
1409 .workqueue = nfsiod_workqueue,
1410 .flags = RPC_TASK_ASYNC,
1411 };
1412 int status;
1413
1414 kref_get(&data->kref);
1415 data->rpc_done = 0;
1416 data->rpc_status = 0;
1417 data->cancelled = 0;
1418 task = rpc_run_task(&task_setup_data);
1419 if (IS_ERR(task))
1420 return PTR_ERR(task);
1421 status = nfs4_wait_for_completion_rpc_task(task);
1422 if (status != 0) {
1423 data->cancelled = 1;
1424 smp_wmb();
1425 } else
1426 status = data->rpc_status;
1427 rpc_put_task(task);
1428 if (status != 0 || !data->rpc_done)
1429 return status;
1430
1431 if (o_res->fh.size == 0)
1432 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1433
1434 if (o_arg->open_flags & O_CREAT) {
1435 update_changeattr(dir, &o_res->cinfo);
1436 nfs_post_op_update_inode(dir, o_res->dir_attr);
1437 } else
1438 nfs_refresh_inode(dir, o_res->dir_attr);
1439 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1440 status = _nfs4_proc_open_confirm(data);
1441 if (status != 0)
1442 return status;
1443 }
1444 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1445 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1446 return 0;
1447 }
1448
1449 static int nfs4_recover_expired_lease(struct nfs_server *server)
1450 {
1451 struct nfs_client *clp = server->nfs_client;
1452 int ret;
1453
1454 for (;;) {
1455 ret = nfs4_wait_clnt_recover(clp);
1456 if (ret != 0)
1457 return ret;
1458 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1459 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1460 break;
1461 nfs4_schedule_state_recovery(clp);
1462 }
1463 return 0;
1464 }
1465
1466 /*
1467 * OPEN_EXPIRED:
1468 * reclaim state on the server after a network partition.
1469 * Assumes caller holds the appropriate lock
1470 */
1471 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1472 {
1473 struct nfs4_opendata *opendata;
1474 int ret;
1475
1476 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1477 if (IS_ERR(opendata))
1478 return PTR_ERR(opendata);
1479 ret = nfs4_open_recover(opendata, state);
1480 if (ret == -ESTALE)
1481 d_drop(ctx->path.dentry);
1482 nfs4_opendata_put(opendata);
1483 return ret;
1484 }
1485
1486 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1487 {
1488 struct nfs_server *server = NFS_SERVER(state->inode);
1489 struct nfs4_exception exception = { };
1490 int err;
1491
1492 do {
1493 err = _nfs4_open_expired(ctx, state);
1494 if (err != -NFS4ERR_DELAY)
1495 break;
1496 nfs4_handle_exception(server, err, &exception);
1497 } while (exception.retry);
1498 return err;
1499 }
1500
1501 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1502 {
1503 struct nfs_open_context *ctx;
1504 int ret;
1505
1506 ctx = nfs4_state_find_open_context(state);
1507 if (IS_ERR(ctx))
1508 return PTR_ERR(ctx);
1509 ret = nfs4_do_open_expired(ctx, state);
1510 put_nfs_open_context(ctx);
1511 return ret;
1512 }
1513
1514 /*
1515 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1516 * fields corresponding to attributes that were used to store the verifier.
1517 * Make sure we clobber those fields in the later setattr call
1518 */
1519 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1520 {
1521 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1522 !(sattr->ia_valid & ATTR_ATIME_SET))
1523 sattr->ia_valid |= ATTR_ATIME;
1524
1525 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1526 !(sattr->ia_valid & ATTR_MTIME_SET))
1527 sattr->ia_valid |= ATTR_MTIME;
1528 }
1529
1530 /*
1531 * Returns a referenced nfs4_state
1532 */
1533 static 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)
1534 {
1535 struct nfs4_state_owner *sp;
1536 struct nfs4_state *state = NULL;
1537 struct nfs_server *server = NFS_SERVER(dir);
1538 struct nfs4_opendata *opendata;
1539 int status;
1540
1541 /* Protect against reboot recovery conflicts */
1542 status = -ENOMEM;
1543 if (!(sp = nfs4_get_state_owner(server, cred))) {
1544 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1545 goto out_err;
1546 }
1547 status = nfs4_recover_expired_lease(server);
1548 if (status != 0)
1549 goto err_put_state_owner;
1550 if (path->dentry->d_inode != NULL)
1551 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1552 status = -ENOMEM;
1553 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1554 if (opendata == NULL)
1555 goto err_put_state_owner;
1556
1557 if (path->dentry->d_inode != NULL)
1558 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1559
1560 status = _nfs4_proc_open(opendata);
1561 if (status != 0)
1562 goto err_opendata_put;
1563
1564 if (opendata->o_arg.open_flags & O_EXCL)
1565 nfs4_exclusive_attrset(opendata, sattr);
1566
1567 state = nfs4_opendata_to_nfs4_state(opendata);
1568 status = PTR_ERR(state);
1569 if (IS_ERR(state))
1570 goto err_opendata_put;
1571 nfs4_opendata_put(opendata);
1572 nfs4_put_state_owner(sp);
1573 *res = state;
1574 return 0;
1575 err_opendata_put:
1576 nfs4_opendata_put(opendata);
1577 err_put_state_owner:
1578 nfs4_put_state_owner(sp);
1579 out_err:
1580 *res = NULL;
1581 return status;
1582 }
1583
1584
1585 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1586 {
1587 struct nfs4_exception exception = { };
1588 struct nfs4_state *res;
1589 int status;
1590
1591 do {
1592 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1593 if (status == 0)
1594 break;
1595 /* NOTE: BAD_SEQID means the server and client disagree about the
1596 * book-keeping w.r.t. state-changing operations
1597 * (OPEN/CLOSE/LOCK/LOCKU...)
1598 * It is actually a sign of a bug on the client or on the server.
1599 *
1600 * If we receive a BAD_SEQID error in the particular case of
1601 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1602 * have unhashed the old state_owner for us, and that we can
1603 * therefore safely retry using a new one. We should still warn
1604 * the user though...
1605 */
1606 if (status == -NFS4ERR_BAD_SEQID) {
1607 printk(KERN_WARNING "NFS: v4 server %s "
1608 " returned a bad sequence-id error!\n",
1609 NFS_SERVER(dir)->nfs_client->cl_hostname);
1610 exception.retry = 1;
1611 continue;
1612 }
1613 /*
1614 * BAD_STATEID on OPEN means that the server cancelled our
1615 * state before it received the OPEN_CONFIRM.
1616 * Recover by retrying the request as per the discussion
1617 * on Page 181 of RFC3530.
1618 */
1619 if (status == -NFS4ERR_BAD_STATEID) {
1620 exception.retry = 1;
1621 continue;
1622 }
1623 if (status == -EAGAIN) {
1624 /* We must have found a delegation */
1625 exception.retry = 1;
1626 continue;
1627 }
1628 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1629 status, &exception));
1630 } while (exception.retry);
1631 return res;
1632 }
1633
1634 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1635 struct nfs_fattr *fattr, struct iattr *sattr,
1636 struct nfs4_state *state)
1637 {
1638 struct nfs_server *server = NFS_SERVER(inode);
1639 struct nfs_setattrargs arg = {
1640 .fh = NFS_FH(inode),
1641 .iap = sattr,
1642 .server = server,
1643 .bitmask = server->attr_bitmask,
1644 };
1645 struct nfs_setattrres res = {
1646 .fattr = fattr,
1647 .server = server,
1648 };
1649 struct rpc_message msg = {
1650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1651 .rpc_argp = &arg,
1652 .rpc_resp = &res,
1653 .rpc_cred = cred,
1654 };
1655 unsigned long timestamp = jiffies;
1656 int status;
1657
1658 nfs_fattr_init(fattr);
1659
1660 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1661 /* Use that stateid */
1662 } else if (state != NULL) {
1663 nfs4_copy_stateid(&arg.stateid, state, current->files);
1664 } else
1665 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1666
1667 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1668 if (status == 0 && state != NULL)
1669 renew_lease(server, timestamp);
1670 return status;
1671 }
1672
1673 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1674 struct nfs_fattr *fattr, struct iattr *sattr,
1675 struct nfs4_state *state)
1676 {
1677 struct nfs_server *server = NFS_SERVER(inode);
1678 struct nfs4_exception exception = { };
1679 int err;
1680 do {
1681 err = nfs4_handle_exception(server,
1682 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1683 &exception);
1684 } while (exception.retry);
1685 return err;
1686 }
1687
1688 struct nfs4_closedata {
1689 struct path path;
1690 struct inode *inode;
1691 struct nfs4_state *state;
1692 struct nfs_closeargs arg;
1693 struct nfs_closeres res;
1694 struct nfs_fattr fattr;
1695 unsigned long timestamp;
1696 };
1697
1698 static void nfs4_free_closedata(void *data)
1699 {
1700 struct nfs4_closedata *calldata = data;
1701 struct nfs4_state_owner *sp = calldata->state->owner;
1702
1703 nfs4_put_open_state(calldata->state);
1704 nfs_free_seqid(calldata->arg.seqid);
1705 nfs4_put_state_owner(sp);
1706 path_put(&calldata->path);
1707 kfree(calldata);
1708 }
1709
1710 static void nfs4_close_done(struct rpc_task *task, void *data)
1711 {
1712 struct nfs4_closedata *calldata = data;
1713 struct nfs4_state *state = calldata->state;
1714 struct nfs_server *server = NFS_SERVER(calldata->inode);
1715
1716 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1717 if (RPC_ASSASSINATED(task))
1718 return;
1719 /* hmm. we are done with the inode, and in the process of freeing
1720 * the state_owner. we keep this around to process errors
1721 */
1722 switch (task->tk_status) {
1723 case 0:
1724 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1725 renew_lease(server, calldata->timestamp);
1726 break;
1727 case -NFS4ERR_STALE_STATEID:
1728 case -NFS4ERR_OLD_STATEID:
1729 case -NFS4ERR_BAD_STATEID:
1730 case -NFS4ERR_EXPIRED:
1731 if (calldata->arg.fmode == 0)
1732 break;
1733 default:
1734 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1735 nfs4_restart_rpc(task, server->nfs_client);
1736 return;
1737 }
1738 }
1739 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1740 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1741 }
1742
1743 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1744 {
1745 struct nfs4_closedata *calldata = data;
1746 struct nfs4_state *state = calldata->state;
1747 int clear_rd, clear_wr, clear_rdwr;
1748
1749 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1750 return;
1751
1752 clear_rd = clear_wr = clear_rdwr = 0;
1753 spin_lock(&state->owner->so_lock);
1754 /* Calculate the change in open mode */
1755 if (state->n_rdwr == 0) {
1756 if (state->n_rdonly == 0) {
1757 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1758 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1759 }
1760 if (state->n_wronly == 0) {
1761 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1762 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1763 }
1764 }
1765 spin_unlock(&state->owner->so_lock);
1766 if (!clear_rd && !clear_wr && !clear_rdwr) {
1767 /* Note: exit _without_ calling nfs4_close_done */
1768 task->tk_action = NULL;
1769 return;
1770 }
1771 nfs_fattr_init(calldata->res.fattr);
1772 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1773 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1774 calldata->arg.fmode = FMODE_READ;
1775 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1776 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1777 calldata->arg.fmode = FMODE_WRITE;
1778 }
1779 calldata->timestamp = jiffies;
1780 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1781 &calldata->arg.seq_args, &calldata->res.seq_res,
1782 1, task))
1783 return;
1784 rpc_call_start(task);
1785 }
1786
1787 static const struct rpc_call_ops nfs4_close_ops = {
1788 .rpc_call_prepare = nfs4_close_prepare,
1789 .rpc_call_done = nfs4_close_done,
1790 .rpc_release = nfs4_free_closedata,
1791 };
1792
1793 /*
1794 * It is possible for data to be read/written from a mem-mapped file
1795 * after the sys_close call (which hits the vfs layer as a flush).
1796 * This means that we can't safely call nfsv4 close on a file until
1797 * the inode is cleared. This in turn means that we are not good
1798 * NFSv4 citizens - we do not indicate to the server to update the file's
1799 * share state even when we are done with one of the three share
1800 * stateid's in the inode.
1801 *
1802 * NOTE: Caller must be holding the sp->so_owner semaphore!
1803 */
1804 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1805 {
1806 struct nfs_server *server = NFS_SERVER(state->inode);
1807 struct nfs4_closedata *calldata;
1808 struct nfs4_state_owner *sp = state->owner;
1809 struct rpc_task *task;
1810 struct rpc_message msg = {
1811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1812 .rpc_cred = state->owner->so_cred,
1813 };
1814 struct rpc_task_setup task_setup_data = {
1815 .rpc_client = server->client,
1816 .rpc_message = &msg,
1817 .callback_ops = &nfs4_close_ops,
1818 .workqueue = nfsiod_workqueue,
1819 .flags = RPC_TASK_ASYNC,
1820 };
1821 int status = -ENOMEM;
1822
1823 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1824 if (calldata == NULL)
1825 goto out;
1826 calldata->inode = state->inode;
1827 calldata->state = state;
1828 calldata->arg.fh = NFS_FH(state->inode);
1829 calldata->arg.stateid = &state->open_stateid;
1830 if (nfs4_has_session(server->nfs_client))
1831 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1832 /* Serialization for the sequence id */
1833 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1834 if (calldata->arg.seqid == NULL)
1835 goto out_free_calldata;
1836 calldata->arg.fmode = 0;
1837 calldata->arg.bitmask = server->cache_consistency_bitmask;
1838 calldata->res.fattr = &calldata->fattr;
1839 calldata->res.seqid = calldata->arg.seqid;
1840 calldata->res.server = server;
1841 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1842 calldata->path.mnt = mntget(path->mnt);
1843 calldata->path.dentry = dget(path->dentry);
1844
1845 msg.rpc_argp = &calldata->arg,
1846 msg.rpc_resp = &calldata->res,
1847 task_setup_data.callback_data = calldata;
1848 task = rpc_run_task(&task_setup_data);
1849 if (IS_ERR(task))
1850 return PTR_ERR(task);
1851 status = 0;
1852 if (wait)
1853 status = rpc_wait_for_completion_task(task);
1854 rpc_put_task(task);
1855 return status;
1856 out_free_calldata:
1857 kfree(calldata);
1858 out:
1859 nfs4_put_open_state(state);
1860 nfs4_put_state_owner(sp);
1861 return status;
1862 }
1863
1864 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1865 {
1866 struct file *filp;
1867 int ret;
1868
1869 /* If the open_intent is for execute, we have an extra check to make */
1870 if (fmode & FMODE_EXEC) {
1871 ret = nfs_may_open(state->inode,
1872 state->owner->so_cred,
1873 nd->intent.open.flags);
1874 if (ret < 0)
1875 goto out_close;
1876 }
1877 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1878 if (!IS_ERR(filp)) {
1879 struct nfs_open_context *ctx;
1880 ctx = nfs_file_open_context(filp);
1881 ctx->state = state;
1882 return 0;
1883 }
1884 ret = PTR_ERR(filp);
1885 out_close:
1886 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1887 return ret;
1888 }
1889
1890 struct dentry *
1891 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1892 {
1893 struct path path = {
1894 .mnt = nd->path.mnt,
1895 .dentry = dentry,
1896 };
1897 struct dentry *parent;
1898 struct iattr attr;
1899 struct rpc_cred *cred;
1900 struct nfs4_state *state;
1901 struct dentry *res;
1902 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1903
1904 if (nd->flags & LOOKUP_CREATE) {
1905 attr.ia_mode = nd->intent.open.create_mode;
1906 attr.ia_valid = ATTR_MODE;
1907 if (!IS_POSIXACL(dir))
1908 attr.ia_mode &= ~current_umask();
1909 } else {
1910 attr.ia_valid = 0;
1911 BUG_ON(nd->intent.open.flags & O_CREAT);
1912 }
1913
1914 cred = rpc_lookup_cred();
1915 if (IS_ERR(cred))
1916 return (struct dentry *)cred;
1917 parent = dentry->d_parent;
1918 /* Protect against concurrent sillydeletes */
1919 nfs_block_sillyrename(parent);
1920 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1921 put_rpccred(cred);
1922 if (IS_ERR(state)) {
1923 if (PTR_ERR(state) == -ENOENT) {
1924 d_add(dentry, NULL);
1925 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1926 }
1927 nfs_unblock_sillyrename(parent);
1928 return (struct dentry *)state;
1929 }
1930 res = d_add_unique(dentry, igrab(state->inode));
1931 if (res != NULL)
1932 path.dentry = res;
1933 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1934 nfs_unblock_sillyrename(parent);
1935 nfs4_intent_set_file(nd, &path, state, fmode);
1936 return res;
1937 }
1938
1939 int
1940 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1941 {
1942 struct path path = {
1943 .mnt = nd->path.mnt,
1944 .dentry = dentry,
1945 };
1946 struct rpc_cred *cred;
1947 struct nfs4_state *state;
1948 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1949
1950 cred = rpc_lookup_cred();
1951 if (IS_ERR(cred))
1952 return PTR_ERR(cred);
1953 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1954 put_rpccred(cred);
1955 if (IS_ERR(state)) {
1956 switch (PTR_ERR(state)) {
1957 case -EPERM:
1958 case -EACCES:
1959 case -EDQUOT:
1960 case -ENOSPC:
1961 case -EROFS:
1962 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1963 return 1;
1964 default:
1965 goto out_drop;
1966 }
1967 }
1968 if (state->inode == dentry->d_inode) {
1969 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1970 nfs4_intent_set_file(nd, &path, state, fmode);
1971 return 1;
1972 }
1973 nfs4_close_sync(&path, state, fmode);
1974 out_drop:
1975 d_drop(dentry);
1976 return 0;
1977 }
1978
1979 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1980 {
1981 if (ctx->state == NULL)
1982 return;
1983 if (is_sync)
1984 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1985 else
1986 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1987 }
1988
1989 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1990 {
1991 struct nfs4_server_caps_arg args = {
1992 .fhandle = fhandle,
1993 };
1994 struct nfs4_server_caps_res res = {};
1995 struct rpc_message msg = {
1996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1997 .rpc_argp = &args,
1998 .rpc_resp = &res,
1999 };
2000 int status;
2001
2002 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2003 if (status == 0) {
2004 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2005 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2006 server->caps |= NFS_CAP_ACLS;
2007 if (res.has_links != 0)
2008 server->caps |= NFS_CAP_HARDLINKS;
2009 if (res.has_symlinks != 0)
2010 server->caps |= NFS_CAP_SYMLINKS;
2011 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2012 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2013 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2014 server->acl_bitmask = res.acl_bitmask;
2015 }
2016
2017 return status;
2018 }
2019
2020 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2021 {
2022 struct nfs4_exception exception = { };
2023 int err;
2024 do {
2025 err = nfs4_handle_exception(server,
2026 _nfs4_server_capabilities(server, fhandle),
2027 &exception);
2028 } while (exception.retry);
2029 return err;
2030 }
2031
2032 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2033 struct nfs_fsinfo *info)
2034 {
2035 struct nfs4_lookup_root_arg args = {
2036 .bitmask = nfs4_fattr_bitmap,
2037 };
2038 struct nfs4_lookup_res res = {
2039 .server = server,
2040 .fattr = info->fattr,
2041 .fh = fhandle,
2042 };
2043 struct rpc_message msg = {
2044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2045 .rpc_argp = &args,
2046 .rpc_resp = &res,
2047 };
2048
2049 nfs_fattr_init(info->fattr);
2050 return nfs4_call_sync(server, &msg, &args, &res, 0);
2051 }
2052
2053 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2054 struct nfs_fsinfo *info)
2055 {
2056 struct nfs4_exception exception = { };
2057 int err;
2058 do {
2059 err = nfs4_handle_exception(server,
2060 _nfs4_lookup_root(server, fhandle, info),
2061 &exception);
2062 } while (exception.retry);
2063 return err;
2064 }
2065
2066 /*
2067 * get the file handle for the "/" directory on the server
2068 */
2069 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2070 struct nfs_fsinfo *info)
2071 {
2072 int status;
2073
2074 status = nfs4_lookup_root(server, fhandle, info);
2075 if (status == 0)
2076 status = nfs4_server_capabilities(server, fhandle);
2077 if (status == 0)
2078 status = nfs4_do_fsinfo(server, fhandle, info);
2079 return nfs4_map_errors(status);
2080 }
2081
2082 /*
2083 * Get locations and (maybe) other attributes of a referral.
2084 * Note that we'll actually follow the referral later when
2085 * we detect fsid mismatch in inode revalidation
2086 */
2087 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2088 {
2089 int status = -ENOMEM;
2090 struct page *page = NULL;
2091 struct nfs4_fs_locations *locations = NULL;
2092
2093 page = alloc_page(GFP_KERNEL);
2094 if (page == NULL)
2095 goto out;
2096 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2097 if (locations == NULL)
2098 goto out;
2099
2100 status = nfs4_proc_fs_locations(dir, name, locations, page);
2101 if (status != 0)
2102 goto out;
2103 /* Make sure server returned a different fsid for the referral */
2104 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2105 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2106 status = -EIO;
2107 goto out;
2108 }
2109
2110 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2111 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2112 if (!fattr->mode)
2113 fattr->mode = S_IFDIR;
2114 memset(fhandle, 0, sizeof(struct nfs_fh));
2115 out:
2116 if (page)
2117 __free_page(page);
2118 if (locations)
2119 kfree(locations);
2120 return status;
2121 }
2122
2123 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2124 {
2125 struct nfs4_getattr_arg args = {
2126 .fh = fhandle,
2127 .bitmask = server->attr_bitmask,
2128 };
2129 struct nfs4_getattr_res res = {
2130 .fattr = fattr,
2131 .server = server,
2132 };
2133 struct rpc_message msg = {
2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2135 .rpc_argp = &args,
2136 .rpc_resp = &res,
2137 };
2138
2139 nfs_fattr_init(fattr);
2140 return nfs4_call_sync(server, &msg, &args, &res, 0);
2141 }
2142
2143 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2144 {
2145 struct nfs4_exception exception = { };
2146 int err;
2147 do {
2148 err = nfs4_handle_exception(server,
2149 _nfs4_proc_getattr(server, fhandle, fattr),
2150 &exception);
2151 } while (exception.retry);
2152 return err;
2153 }
2154
2155 /*
2156 * The file is not closed if it is opened due to the a request to change
2157 * the size of the file. The open call will not be needed once the
2158 * VFS layer lookup-intents are implemented.
2159 *
2160 * Close is called when the inode is destroyed.
2161 * If we haven't opened the file for O_WRONLY, we
2162 * need to in the size_change case to obtain a stateid.
2163 *
2164 * Got race?
2165 * Because OPEN is always done by name in nfsv4, it is
2166 * possible that we opened a different file by the same
2167 * name. We can recognize this race condition, but we
2168 * can't do anything about it besides returning an error.
2169 *
2170 * This will be fixed with VFS changes (lookup-intent).
2171 */
2172 static int
2173 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2174 struct iattr *sattr)
2175 {
2176 struct inode *inode = dentry->d_inode;
2177 struct rpc_cred *cred = NULL;
2178 struct nfs4_state *state = NULL;
2179 int status;
2180
2181 nfs_fattr_init(fattr);
2182
2183 /* Search for an existing open(O_WRITE) file */
2184 if (sattr->ia_valid & ATTR_FILE) {
2185 struct nfs_open_context *ctx;
2186
2187 ctx = nfs_file_open_context(sattr->ia_file);
2188 if (ctx) {
2189 cred = ctx->cred;
2190 state = ctx->state;
2191 }
2192 }
2193
2194 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2195 if (status == 0)
2196 nfs_setattr_update_inode(inode, sattr);
2197 return status;
2198 }
2199
2200 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2201 const struct qstr *name, struct nfs_fh *fhandle,
2202 struct nfs_fattr *fattr)
2203 {
2204 int status;
2205 struct nfs4_lookup_arg args = {
2206 .bitmask = server->attr_bitmask,
2207 .dir_fh = dirfh,
2208 .name = name,
2209 };
2210 struct nfs4_lookup_res res = {
2211 .server = server,
2212 .fattr = fattr,
2213 .fh = fhandle,
2214 };
2215 struct rpc_message msg = {
2216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2217 .rpc_argp = &args,
2218 .rpc_resp = &res,
2219 };
2220
2221 nfs_fattr_init(fattr);
2222
2223 dprintk("NFS call lookupfh %s\n", name->name);
2224 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2225 dprintk("NFS reply lookupfh: %d\n", status);
2226 return status;
2227 }
2228
2229 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2230 struct qstr *name, struct nfs_fh *fhandle,
2231 struct nfs_fattr *fattr)
2232 {
2233 struct nfs4_exception exception = { };
2234 int err;
2235 do {
2236 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2237 /* FIXME: !!!! */
2238 if (err == -NFS4ERR_MOVED) {
2239 err = -EREMOTE;
2240 break;
2241 }
2242 err = nfs4_handle_exception(server, err, &exception);
2243 } while (exception.retry);
2244 return err;
2245 }
2246
2247 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2248 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2249 {
2250 int status;
2251
2252 dprintk("NFS call lookup %s\n", name->name);
2253 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2254 if (status == -NFS4ERR_MOVED)
2255 status = nfs4_get_referral(dir, name, fattr, fhandle);
2256 dprintk("NFS reply lookup: %d\n", status);
2257 return status;
2258 }
2259
2260 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2261 {
2262 struct nfs4_exception exception = { };
2263 int err;
2264 do {
2265 err = nfs4_handle_exception(NFS_SERVER(dir),
2266 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2267 &exception);
2268 } while (exception.retry);
2269 return err;
2270 }
2271
2272 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2273 {
2274 struct nfs_server *server = NFS_SERVER(inode);
2275 struct nfs_fattr fattr;
2276 struct nfs4_accessargs args = {
2277 .fh = NFS_FH(inode),
2278 .bitmask = server->attr_bitmask,
2279 };
2280 struct nfs4_accessres res = {
2281 .server = server,
2282 .fattr = &fattr,
2283 };
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2286 .rpc_argp = &args,
2287 .rpc_resp = &res,
2288 .rpc_cred = entry->cred,
2289 };
2290 int mode = entry->mask;
2291 int status;
2292
2293 /*
2294 * Determine which access bits we want to ask for...
2295 */
2296 if (mode & MAY_READ)
2297 args.access |= NFS4_ACCESS_READ;
2298 if (S_ISDIR(inode->i_mode)) {
2299 if (mode & MAY_WRITE)
2300 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2301 if (mode & MAY_EXEC)
2302 args.access |= NFS4_ACCESS_LOOKUP;
2303 } else {
2304 if (mode & MAY_WRITE)
2305 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2306 if (mode & MAY_EXEC)
2307 args.access |= NFS4_ACCESS_EXECUTE;
2308 }
2309 nfs_fattr_init(&fattr);
2310 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2311 if (!status) {
2312 entry->mask = 0;
2313 if (res.access & NFS4_ACCESS_READ)
2314 entry->mask |= MAY_READ;
2315 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2316 entry->mask |= MAY_WRITE;
2317 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2318 entry->mask |= MAY_EXEC;
2319 nfs_refresh_inode(inode, &fattr);
2320 }
2321 return status;
2322 }
2323
2324 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2325 {
2326 struct nfs4_exception exception = { };
2327 int err;
2328 do {
2329 err = nfs4_handle_exception(NFS_SERVER(inode),
2330 _nfs4_proc_access(inode, entry),
2331 &exception);
2332 } while (exception.retry);
2333 return err;
2334 }
2335
2336 /*
2337 * TODO: For the time being, we don't try to get any attributes
2338 * along with any of the zero-copy operations READ, READDIR,
2339 * READLINK, WRITE.
2340 *
2341 * In the case of the first three, we want to put the GETATTR
2342 * after the read-type operation -- this is because it is hard
2343 * to predict the length of a GETATTR response in v4, and thus
2344 * align the READ data correctly. This means that the GETATTR
2345 * may end up partially falling into the page cache, and we should
2346 * shift it into the 'tail' of the xdr_buf before processing.
2347 * To do this efficiently, we need to know the total length
2348 * of data received, which doesn't seem to be available outside
2349 * of the RPC layer.
2350 *
2351 * In the case of WRITE, we also want to put the GETATTR after
2352 * the operation -- in this case because we want to make sure
2353 * we get the post-operation mtime and size. This means that
2354 * we can't use xdr_encode_pages() as written: we need a variant
2355 * of it which would leave room in the 'tail' iovec.
2356 *
2357 * Both of these changes to the XDR layer would in fact be quite
2358 * minor, but I decided to leave them for a subsequent patch.
2359 */
2360 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2361 unsigned int pgbase, unsigned int pglen)
2362 {
2363 struct nfs4_readlink args = {
2364 .fh = NFS_FH(inode),
2365 .pgbase = pgbase,
2366 .pglen = pglen,
2367 .pages = &page,
2368 };
2369 struct nfs4_readlink_res res;
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
2374 };
2375
2376 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2377 }
2378
2379 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2380 unsigned int pgbase, unsigned int pglen)
2381 {
2382 struct nfs4_exception exception = { };
2383 int err;
2384 do {
2385 err = nfs4_handle_exception(NFS_SERVER(inode),
2386 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2387 &exception);
2388 } while (exception.retry);
2389 return err;
2390 }
2391
2392 /*
2393 * Got race?
2394 * We will need to arrange for the VFS layer to provide an atomic open.
2395 * Until then, this create/open method is prone to inefficiency and race
2396 * conditions due to the lookup, create, and open VFS calls from sys_open()
2397 * placed on the wire.
2398 *
2399 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2400 * The file will be opened again in the subsequent VFS open call
2401 * (nfs4_proc_file_open).
2402 *
2403 * The open for read will just hang around to be used by any process that
2404 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2405 */
2406
2407 static int
2408 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2409 int flags, struct nameidata *nd)
2410 {
2411 struct path path = {
2412 .mnt = nd->path.mnt,
2413 .dentry = dentry,
2414 };
2415 struct nfs4_state *state;
2416 struct rpc_cred *cred;
2417 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2418 int status = 0;
2419
2420 cred = rpc_lookup_cred();
2421 if (IS_ERR(cred)) {
2422 status = PTR_ERR(cred);
2423 goto out;
2424 }
2425 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2426 d_drop(dentry);
2427 if (IS_ERR(state)) {
2428 status = PTR_ERR(state);
2429 goto out_putcred;
2430 }
2431 d_add(dentry, igrab(state->inode));
2432 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2433 if (flags & O_EXCL) {
2434 struct nfs_fattr fattr;
2435 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2436 if (status == 0)
2437 nfs_setattr_update_inode(state->inode, sattr);
2438 nfs_post_op_update_inode(state->inode, &fattr);
2439 }
2440 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2441 status = nfs4_intent_set_file(nd, &path, state, fmode);
2442 else
2443 nfs4_close_sync(&path, state, fmode);
2444 out_putcred:
2445 put_rpccred(cred);
2446 out:
2447 return status;
2448 }
2449
2450 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2451 {
2452 struct nfs_server *server = NFS_SERVER(dir);
2453 struct nfs_removeargs args = {
2454 .fh = NFS_FH(dir),
2455 .name.len = name->len,
2456 .name.name = name->name,
2457 .bitmask = server->attr_bitmask,
2458 };
2459 struct nfs_removeres res = {
2460 .server = server,
2461 };
2462 struct rpc_message msg = {
2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2464 .rpc_argp = &args,
2465 .rpc_resp = &res,
2466 };
2467 int status;
2468
2469 nfs_fattr_init(&res.dir_attr);
2470 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2471 if (status == 0) {
2472 update_changeattr(dir, &res.cinfo);
2473 nfs_post_op_update_inode(dir, &res.dir_attr);
2474 }
2475 return status;
2476 }
2477
2478 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2479 {
2480 struct nfs4_exception exception = { };
2481 int err;
2482 do {
2483 err = nfs4_handle_exception(NFS_SERVER(dir),
2484 _nfs4_proc_remove(dir, name),
2485 &exception);
2486 } while (exception.retry);
2487 return err;
2488 }
2489
2490 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2491 {
2492 struct nfs_server *server = NFS_SERVER(dir);
2493 struct nfs_removeargs *args = msg->rpc_argp;
2494 struct nfs_removeres *res = msg->rpc_resp;
2495
2496 args->bitmask = server->cache_consistency_bitmask;
2497 res->server = server;
2498 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2499 }
2500
2501 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2502 {
2503 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2504
2505 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2506 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2507 return 0;
2508 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2509 update_changeattr(dir, &res->cinfo);
2510 nfs_post_op_update_inode(dir, &res->dir_attr);
2511 return 1;
2512 }
2513
2514 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2515 struct inode *new_dir, struct qstr *new_name)
2516 {
2517 struct nfs_server *server = NFS_SERVER(old_dir);
2518 struct nfs4_rename_arg arg = {
2519 .old_dir = NFS_FH(old_dir),
2520 .new_dir = NFS_FH(new_dir),
2521 .old_name = old_name,
2522 .new_name = new_name,
2523 .bitmask = server->attr_bitmask,
2524 };
2525 struct nfs_fattr old_fattr, new_fattr;
2526 struct nfs4_rename_res res = {
2527 .server = server,
2528 .old_fattr = &old_fattr,
2529 .new_fattr = &new_fattr,
2530 };
2531 struct rpc_message msg = {
2532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2533 .rpc_argp = &arg,
2534 .rpc_resp = &res,
2535 };
2536 int status;
2537
2538 nfs_fattr_init(res.old_fattr);
2539 nfs_fattr_init(res.new_fattr);
2540 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2541
2542 if (!status) {
2543 update_changeattr(old_dir, &res.old_cinfo);
2544 nfs_post_op_update_inode(old_dir, res.old_fattr);
2545 update_changeattr(new_dir, &res.new_cinfo);
2546 nfs_post_op_update_inode(new_dir, res.new_fattr);
2547 }
2548 return status;
2549 }
2550
2551 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2552 struct inode *new_dir, struct qstr *new_name)
2553 {
2554 struct nfs4_exception exception = { };
2555 int err;
2556 do {
2557 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2558 _nfs4_proc_rename(old_dir, old_name,
2559 new_dir, new_name),
2560 &exception);
2561 } while (exception.retry);
2562 return err;
2563 }
2564
2565 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2566 {
2567 struct nfs_server *server = NFS_SERVER(inode);
2568 struct nfs4_link_arg arg = {
2569 .fh = NFS_FH(inode),
2570 .dir_fh = NFS_FH(dir),
2571 .name = name,
2572 .bitmask = server->attr_bitmask,
2573 };
2574 struct nfs_fattr fattr, dir_attr;
2575 struct nfs4_link_res res = {
2576 .server = server,
2577 .fattr = &fattr,
2578 .dir_attr = &dir_attr,
2579 };
2580 struct rpc_message msg = {
2581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2582 .rpc_argp = &arg,
2583 .rpc_resp = &res,
2584 };
2585 int status;
2586
2587 nfs_fattr_init(res.fattr);
2588 nfs_fattr_init(res.dir_attr);
2589 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2590 if (!status) {
2591 update_changeattr(dir, &res.cinfo);
2592 nfs_post_op_update_inode(dir, res.dir_attr);
2593 nfs_post_op_update_inode(inode, res.fattr);
2594 }
2595
2596 return status;
2597 }
2598
2599 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2600 {
2601 struct nfs4_exception exception = { };
2602 int err;
2603 do {
2604 err = nfs4_handle_exception(NFS_SERVER(inode),
2605 _nfs4_proc_link(inode, dir, name),
2606 &exception);
2607 } while (exception.retry);
2608 return err;
2609 }
2610
2611 struct nfs4_createdata {
2612 struct rpc_message msg;
2613 struct nfs4_create_arg arg;
2614 struct nfs4_create_res res;
2615 struct nfs_fh fh;
2616 struct nfs_fattr fattr;
2617 struct nfs_fattr dir_fattr;
2618 };
2619
2620 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2621 struct qstr *name, struct iattr *sattr, u32 ftype)
2622 {
2623 struct nfs4_createdata *data;
2624
2625 data = kzalloc(sizeof(*data), GFP_KERNEL);
2626 if (data != NULL) {
2627 struct nfs_server *server = NFS_SERVER(dir);
2628
2629 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2630 data->msg.rpc_argp = &data->arg;
2631 data->msg.rpc_resp = &data->res;
2632 data->arg.dir_fh = NFS_FH(dir);
2633 data->arg.server = server;
2634 data->arg.name = name;
2635 data->arg.attrs = sattr;
2636 data->arg.ftype = ftype;
2637 data->arg.bitmask = server->attr_bitmask;
2638 data->res.server = server;
2639 data->res.fh = &data->fh;
2640 data->res.fattr = &data->fattr;
2641 data->res.dir_fattr = &data->dir_fattr;
2642 nfs_fattr_init(data->res.fattr);
2643 nfs_fattr_init(data->res.dir_fattr);
2644 }
2645 return data;
2646 }
2647
2648 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2649 {
2650 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2651 &data->arg, &data->res, 1);
2652 if (status == 0) {
2653 update_changeattr(dir, &data->res.dir_cinfo);
2654 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2655 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2656 }
2657 return status;
2658 }
2659
2660 static void nfs4_free_createdata(struct nfs4_createdata *data)
2661 {
2662 kfree(data);
2663 }
2664
2665 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2666 struct page *page, unsigned int len, struct iattr *sattr)
2667 {
2668 struct nfs4_createdata *data;
2669 int status = -ENAMETOOLONG;
2670
2671 if (len > NFS4_MAXPATHLEN)
2672 goto out;
2673
2674 status = -ENOMEM;
2675 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2676 if (data == NULL)
2677 goto out;
2678
2679 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2680 data->arg.u.symlink.pages = &page;
2681 data->arg.u.symlink.len = len;
2682
2683 status = nfs4_do_create(dir, dentry, data);
2684
2685 nfs4_free_createdata(data);
2686 out:
2687 return status;
2688 }
2689
2690 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2691 struct page *page, unsigned int len, struct iattr *sattr)
2692 {
2693 struct nfs4_exception exception = { };
2694 int err;
2695 do {
2696 err = nfs4_handle_exception(NFS_SERVER(dir),
2697 _nfs4_proc_symlink(dir, dentry, page,
2698 len, sattr),
2699 &exception);
2700 } while (exception.retry);
2701 return err;
2702 }
2703
2704 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2705 struct iattr *sattr)
2706 {
2707 struct nfs4_createdata *data;
2708 int status = -ENOMEM;
2709
2710 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2711 if (data == NULL)
2712 goto out;
2713
2714 status = nfs4_do_create(dir, dentry, data);
2715
2716 nfs4_free_createdata(data);
2717 out:
2718 return status;
2719 }
2720
2721 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2722 struct iattr *sattr)
2723 {
2724 struct nfs4_exception exception = { };
2725 int err;
2726 do {
2727 err = nfs4_handle_exception(NFS_SERVER(dir),
2728 _nfs4_proc_mkdir(dir, dentry, sattr),
2729 &exception);
2730 } while (exception.retry);
2731 return err;
2732 }
2733
2734 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2735 u64 cookie, struct page *page, unsigned int count, int plus)
2736 {
2737 struct inode *dir = dentry->d_inode;
2738 struct nfs4_readdir_arg args = {
2739 .fh = NFS_FH(dir),
2740 .pages = &page,
2741 .pgbase = 0,
2742 .count = count,
2743 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2744 };
2745 struct nfs4_readdir_res res;
2746 struct rpc_message msg = {
2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2748 .rpc_argp = &args,
2749 .rpc_resp = &res,
2750 .rpc_cred = cred,
2751 };
2752 int status;
2753
2754 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2755 dentry->d_parent->d_name.name,
2756 dentry->d_name.name,
2757 (unsigned long long)cookie);
2758 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2759 res.pgbase = args.pgbase;
2760 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2761 if (status == 0)
2762 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2763
2764 nfs_invalidate_atime(dir);
2765
2766 dprintk("%s: returns %d\n", __func__, status);
2767 return status;
2768 }
2769
2770 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2771 u64 cookie, struct page *page, unsigned int count, int plus)
2772 {
2773 struct nfs4_exception exception = { };
2774 int err;
2775 do {
2776 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2777 _nfs4_proc_readdir(dentry, cred, cookie,
2778 page, count, plus),
2779 &exception);
2780 } while (exception.retry);
2781 return err;
2782 }
2783
2784 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2785 struct iattr *sattr, dev_t rdev)
2786 {
2787 struct nfs4_createdata *data;
2788 int mode = sattr->ia_mode;
2789 int status = -ENOMEM;
2790
2791 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2792 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2793
2794 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2795 if (data == NULL)
2796 goto out;
2797
2798 if (S_ISFIFO(mode))
2799 data->arg.ftype = NF4FIFO;
2800 else if (S_ISBLK(mode)) {
2801 data->arg.ftype = NF4BLK;
2802 data->arg.u.device.specdata1 = MAJOR(rdev);
2803 data->arg.u.device.specdata2 = MINOR(rdev);
2804 }
2805 else if (S_ISCHR(mode)) {
2806 data->arg.ftype = NF4CHR;
2807 data->arg.u.device.specdata1 = MAJOR(rdev);
2808 data->arg.u.device.specdata2 = MINOR(rdev);
2809 }
2810
2811 status = nfs4_do_create(dir, dentry, data);
2812
2813 nfs4_free_createdata(data);
2814 out:
2815 return status;
2816 }
2817
2818 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2819 struct iattr *sattr, dev_t rdev)
2820 {
2821 struct nfs4_exception exception = { };
2822 int err;
2823 do {
2824 err = nfs4_handle_exception(NFS_SERVER(dir),
2825 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2826 &exception);
2827 } while (exception.retry);
2828 return err;
2829 }
2830
2831 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2832 struct nfs_fsstat *fsstat)
2833 {
2834 struct nfs4_statfs_arg args = {
2835 .fh = fhandle,
2836 .bitmask = server->attr_bitmask,
2837 };
2838 struct nfs4_statfs_res res = {
2839 .fsstat = fsstat,
2840 };
2841 struct rpc_message msg = {
2842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2843 .rpc_argp = &args,
2844 .rpc_resp = &res,
2845 };
2846
2847 nfs_fattr_init(fsstat->fattr);
2848 return nfs4_call_sync(server, &msg, &args, &res, 0);
2849 }
2850
2851 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2852 {
2853 struct nfs4_exception exception = { };
2854 int err;
2855 do {
2856 err = nfs4_handle_exception(server,
2857 _nfs4_proc_statfs(server, fhandle, fsstat),
2858 &exception);
2859 } while (exception.retry);
2860 return err;
2861 }
2862
2863 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2864 struct nfs_fsinfo *fsinfo)
2865 {
2866 struct nfs4_fsinfo_arg args = {
2867 .fh = fhandle,
2868 .bitmask = server->attr_bitmask,
2869 };
2870 struct nfs4_fsinfo_res res = {
2871 .fsinfo = fsinfo,
2872 };
2873 struct rpc_message msg = {
2874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2875 .rpc_argp = &args,
2876 .rpc_resp = &res,
2877 };
2878
2879 return nfs4_call_sync(server, &msg, &args, &res, 0);
2880 }
2881
2882 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2883 {
2884 struct nfs4_exception exception = { };
2885 int err;
2886
2887 do {
2888 err = nfs4_handle_exception(server,
2889 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2890 &exception);
2891 } while (exception.retry);
2892 return err;
2893 }
2894
2895 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2896 {
2897 nfs_fattr_init(fsinfo->fattr);
2898 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2899 }
2900
2901 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2902 struct nfs_pathconf *pathconf)
2903 {
2904 struct nfs4_pathconf_arg args = {
2905 .fh = fhandle,
2906 .bitmask = server->attr_bitmask,
2907 };
2908 struct nfs4_pathconf_res res = {
2909 .pathconf = pathconf,
2910 };
2911 struct rpc_message msg = {
2912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2913 .rpc_argp = &args,
2914 .rpc_resp = &res,
2915 };
2916
2917 /* None of the pathconf attributes are mandatory to implement */
2918 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2919 memset(pathconf, 0, sizeof(*pathconf));
2920 return 0;
2921 }
2922
2923 nfs_fattr_init(pathconf->fattr);
2924 return nfs4_call_sync(server, &msg, &args, &res, 0);
2925 }
2926
2927 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2928 struct nfs_pathconf *pathconf)
2929 {
2930 struct nfs4_exception exception = { };
2931 int err;
2932
2933 do {
2934 err = nfs4_handle_exception(server,
2935 _nfs4_proc_pathconf(server, fhandle, pathconf),
2936 &exception);
2937 } while (exception.retry);
2938 return err;
2939 }
2940
2941 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2942 {
2943 struct nfs_server *server = NFS_SERVER(data->inode);
2944
2945 dprintk("--> %s\n", __func__);
2946
2947 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2948 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2949
2950 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2951 nfs4_restart_rpc(task, server->nfs_client);
2952 return -EAGAIN;
2953 }
2954
2955 nfs_invalidate_atime(data->inode);
2956 if (task->tk_status > 0)
2957 renew_lease(server, data->timestamp);
2958 return 0;
2959 }
2960
2961 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2962 {
2963 data->timestamp = jiffies;
2964 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2965 }
2966
2967 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2968 {
2969 struct inode *inode = data->inode;
2970
2971 /* slot is freed in nfs_writeback_done */
2972 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2973 task->tk_status);
2974
2975 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2976 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2977 return -EAGAIN;
2978 }
2979 if (task->tk_status >= 0) {
2980 renew_lease(NFS_SERVER(inode), data->timestamp);
2981 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2982 }
2983 return 0;
2984 }
2985
2986 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2987 {
2988 struct nfs_server *server = NFS_SERVER(data->inode);
2989
2990 data->args.bitmask = server->cache_consistency_bitmask;
2991 data->res.server = server;
2992 data->timestamp = jiffies;
2993
2994 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2995 }
2996
2997 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2998 {
2999 struct inode *inode = data->inode;
3000
3001 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3002 task->tk_status);
3003 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3004 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3005 return -EAGAIN;
3006 }
3007 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3008 &data->res.seq_res);
3009 nfs_refresh_inode(inode, data->res.fattr);
3010 return 0;
3011 }
3012
3013 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3014 {
3015 struct nfs_server *server = NFS_SERVER(data->inode);
3016
3017 data->args.bitmask = server->cache_consistency_bitmask;
3018 data->res.server = server;
3019 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3020 }
3021
3022 /*
3023 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3024 * standalone procedure for queueing an asynchronous RENEW.
3025 */
3026 static void nfs4_renew_done(struct rpc_task *task, void *data)
3027 {
3028 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3029 unsigned long timestamp = (unsigned long)data;
3030
3031 if (task->tk_status < 0) {
3032 /* Unless we're shutting down, schedule state recovery! */
3033 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3034 nfs4_schedule_state_recovery(clp);
3035 return;
3036 }
3037 spin_lock(&clp->cl_lock);
3038 if (time_before(clp->cl_last_renewal,timestamp))
3039 clp->cl_last_renewal = timestamp;
3040 spin_unlock(&clp->cl_lock);
3041 }
3042
3043 static const struct rpc_call_ops nfs4_renew_ops = {
3044 .rpc_call_done = nfs4_renew_done,
3045 };
3046
3047 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3048 {
3049 struct rpc_message msg = {
3050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3051 .rpc_argp = clp,
3052 .rpc_cred = cred,
3053 };
3054
3055 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3056 &nfs4_renew_ops, (void *)jiffies);
3057 }
3058
3059 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3060 {
3061 struct rpc_message msg = {
3062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3063 .rpc_argp = clp,
3064 .rpc_cred = cred,
3065 };
3066 unsigned long now = jiffies;
3067 int status;
3068
3069 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3070 if (status < 0)
3071 return status;
3072 spin_lock(&clp->cl_lock);
3073 if (time_before(clp->cl_last_renewal,now))
3074 clp->cl_last_renewal = now;
3075 spin_unlock(&clp->cl_lock);
3076 return 0;
3077 }
3078
3079 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3080 {
3081 return (server->caps & NFS_CAP_ACLS)
3082 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3083 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3084 }
3085
3086 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3087 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3088 * the stack.
3089 */
3090 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3091
3092 static void buf_to_pages(const void *buf, size_t buflen,
3093 struct page **pages, unsigned int *pgbase)
3094 {
3095 const void *p = buf;
3096
3097 *pgbase = offset_in_page(buf);
3098 p -= *pgbase;
3099 while (p < buf + buflen) {
3100 *(pages++) = virt_to_page(p);
3101 p += PAGE_CACHE_SIZE;
3102 }
3103 }
3104
3105 struct nfs4_cached_acl {
3106 int cached;
3107 size_t len;
3108 char data[0];
3109 };
3110
3111 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3112 {
3113 struct nfs_inode *nfsi = NFS_I(inode);
3114
3115 spin_lock(&inode->i_lock);
3116 kfree(nfsi->nfs4_acl);
3117 nfsi->nfs4_acl = acl;
3118 spin_unlock(&inode->i_lock);
3119 }
3120
3121 static void nfs4_zap_acl_attr(struct inode *inode)
3122 {
3123 nfs4_set_cached_acl(inode, NULL);
3124 }
3125
3126 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3127 {
3128 struct nfs_inode *nfsi = NFS_I(inode);
3129 struct nfs4_cached_acl *acl;
3130 int ret = -ENOENT;
3131
3132 spin_lock(&inode->i_lock);
3133 acl = nfsi->nfs4_acl;
3134 if (acl == NULL)
3135 goto out;
3136 if (buf == NULL) /* user is just asking for length */
3137 goto out_len;
3138 if (acl->cached == 0)
3139 goto out;
3140 ret = -ERANGE; /* see getxattr(2) man page */
3141 if (acl->len > buflen)
3142 goto out;
3143 memcpy(buf, acl->data, acl->len);
3144 out_len:
3145 ret = acl->len;
3146 out:
3147 spin_unlock(&inode->i_lock);
3148 return ret;
3149 }
3150
3151 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3152 {
3153 struct nfs4_cached_acl *acl;
3154
3155 if (buf && acl_len <= PAGE_SIZE) {
3156 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3157 if (acl == NULL)
3158 goto out;
3159 acl->cached = 1;
3160 memcpy(acl->data, buf, acl_len);
3161 } else {
3162 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3163 if (acl == NULL)
3164 goto out;
3165 acl->cached = 0;
3166 }
3167 acl->len = acl_len;
3168 out:
3169 nfs4_set_cached_acl(inode, acl);
3170 }
3171
3172 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3173 {
3174 struct page *pages[NFS4ACL_MAXPAGES];
3175 struct nfs_getaclargs args = {
3176 .fh = NFS_FH(inode),
3177 .acl_pages = pages,
3178 .acl_len = buflen,
3179 };
3180 struct nfs_getaclres res = {
3181 .acl_len = buflen,
3182 };
3183 void *resp_buf;
3184 struct rpc_message msg = {
3185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3186 .rpc_argp = &args,
3187 .rpc_resp = &res,
3188 };
3189 struct page *localpage = NULL;
3190 int ret;
3191
3192 if (buflen < PAGE_SIZE) {
3193 /* As long as we're doing a round trip to the server anyway,
3194 * let's be prepared for a page of acl data. */
3195 localpage = alloc_page(GFP_KERNEL);
3196 resp_buf = page_address(localpage);
3197 if (localpage == NULL)
3198 return -ENOMEM;
3199 args.acl_pages[0] = localpage;
3200 args.acl_pgbase = 0;
3201 args.acl_len = PAGE_SIZE;
3202 } else {
3203 resp_buf = buf;
3204 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3205 }
3206 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3207 if (ret)
3208 goto out_free;
3209 if (res.acl_len > args.acl_len)
3210 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3211 else
3212 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3213 if (buf) {
3214 ret = -ERANGE;
3215 if (res.acl_len > buflen)
3216 goto out_free;
3217 if (localpage)
3218 memcpy(buf, resp_buf, res.acl_len);
3219 }
3220 ret = res.acl_len;
3221 out_free:
3222 if (localpage)
3223 __free_page(localpage);
3224 return ret;
3225 }
3226
3227 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3228 {
3229 struct nfs4_exception exception = { };
3230 ssize_t ret;
3231 do {
3232 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3233 if (ret >= 0)
3234 break;
3235 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3236 } while (exception.retry);
3237 return ret;
3238 }
3239
3240 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3241 {
3242 struct nfs_server *server = NFS_SERVER(inode);
3243 int ret;
3244
3245 if (!nfs4_server_supports_acls(server))
3246 return -EOPNOTSUPP;
3247 ret = nfs_revalidate_inode(server, inode);
3248 if (ret < 0)
3249 return ret;
3250 ret = nfs4_read_cached_acl(inode, buf, buflen);
3251 if (ret != -ENOENT)
3252 return ret;
3253 return nfs4_get_acl_uncached(inode, buf, buflen);
3254 }
3255
3256 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3257 {
3258 struct nfs_server *server = NFS_SERVER(inode);
3259 struct page *pages[NFS4ACL_MAXPAGES];
3260 struct nfs_setaclargs arg = {
3261 .fh = NFS_FH(inode),
3262 .acl_pages = pages,
3263 .acl_len = buflen,
3264 };
3265 struct nfs_setaclres res;
3266 struct rpc_message msg = {
3267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3268 .rpc_argp = &arg,
3269 .rpc_resp = &res,
3270 };
3271 int ret;
3272
3273 if (!nfs4_server_supports_acls(server))
3274 return -EOPNOTSUPP;
3275 nfs_inode_return_delegation(inode);
3276 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3277 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3278 nfs_access_zap_cache(inode);
3279 nfs_zap_acl_cache(inode);
3280 return ret;
3281 }
3282
3283 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3284 {
3285 struct nfs4_exception exception = { };
3286 int err;
3287 do {
3288 err = nfs4_handle_exception(NFS_SERVER(inode),
3289 __nfs4_proc_set_acl(inode, buf, buflen),
3290 &exception);
3291 } while (exception.retry);
3292 return err;
3293 }
3294
3295 static int
3296 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3297 {
3298 if (!clp || task->tk_status >= 0)
3299 return 0;
3300 switch(task->tk_status) {
3301 case -NFS4ERR_ADMIN_REVOKED:
3302 case -NFS4ERR_BAD_STATEID:
3303 case -NFS4ERR_OPENMODE:
3304 if (state == NULL)
3305 break;
3306 nfs4_state_mark_reclaim_nograce(clp, state);
3307 case -NFS4ERR_STALE_CLIENTID:
3308 case -NFS4ERR_STALE_STATEID:
3309 case -NFS4ERR_EXPIRED:
3310 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3311 nfs4_schedule_state_recovery(clp);
3312 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3313 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3314 task->tk_status = 0;
3315 return -EAGAIN;
3316 #if defined(CONFIG_NFS_V4_1)
3317 case -NFS4ERR_BADSESSION:
3318 case -NFS4ERR_BADSLOT:
3319 case -NFS4ERR_BAD_HIGH_SLOT:
3320 case -NFS4ERR_DEADSESSION:
3321 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3322 case -NFS4ERR_SEQ_FALSE_RETRY:
3323 case -NFS4ERR_SEQ_MISORDERED:
3324 dprintk("%s ERROR %d, Reset session\n", __func__,
3325 task->tk_status);
3326 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3327 task->tk_status = 0;
3328 return -EAGAIN;
3329 #endif /* CONFIG_NFS_V4_1 */
3330 case -NFS4ERR_DELAY:
3331 if (server)
3332 nfs_inc_server_stats(server, NFSIOS_DELAY);
3333 case -NFS4ERR_GRACE:
3334 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3335 task->tk_status = 0;
3336 return -EAGAIN;
3337 case -NFS4ERR_OLD_STATEID:
3338 task->tk_status = 0;
3339 return -EAGAIN;
3340 }
3341 task->tk_status = nfs4_map_errors(task->tk_status);
3342 return 0;
3343 }
3344
3345 static int
3346 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3347 {
3348 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3349 }
3350
3351 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3352 {
3353 nfs4_verifier sc_verifier;
3354 struct nfs4_setclientid setclientid = {
3355 .sc_verifier = &sc_verifier,
3356 .sc_prog = program,
3357 };
3358 struct rpc_message msg = {
3359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3360 .rpc_argp = &setclientid,
3361 .rpc_resp = clp,
3362 .rpc_cred = cred,
3363 };
3364 __be32 *p;
3365 int loop = 0;
3366 int status;
3367
3368 p = (__be32*)sc_verifier.data;
3369 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3370 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3371
3372 for(;;) {
3373 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3374 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3375 clp->cl_ipaddr,
3376 rpc_peeraddr2str(clp->cl_rpcclient,
3377 RPC_DISPLAY_ADDR),
3378 rpc_peeraddr2str(clp->cl_rpcclient,
3379 RPC_DISPLAY_PROTO),
3380 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3381 clp->cl_id_uniquifier);
3382 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3383 sizeof(setclientid.sc_netid),
3384 rpc_peeraddr2str(clp->cl_rpcclient,
3385 RPC_DISPLAY_NETID));
3386 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3387 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3388 clp->cl_ipaddr, port >> 8, port & 255);
3389
3390 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3391 if (status != -NFS4ERR_CLID_INUSE)
3392 break;
3393 if (signalled())
3394 break;
3395 if (loop++ & 1)
3396 ssleep(clp->cl_lease_time + 1);
3397 else
3398 if (++clp->cl_id_uniquifier == 0)
3399 break;
3400 }
3401 return status;
3402 }
3403
3404 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3405 {
3406 struct nfs_fsinfo fsinfo;
3407 struct rpc_message msg = {
3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3409 .rpc_argp = clp,
3410 .rpc_resp = &fsinfo,
3411 .rpc_cred = cred,
3412 };
3413 unsigned long now;
3414 int status;
3415
3416 now = jiffies;
3417 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3418 if (status == 0) {
3419 spin_lock(&clp->cl_lock);
3420 clp->cl_lease_time = fsinfo.lease_time * HZ;
3421 clp->cl_last_renewal = now;
3422 spin_unlock(&clp->cl_lock);
3423 }
3424 return status;
3425 }
3426
3427 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3428 {
3429 long timeout = 0;
3430 int err;
3431 do {
3432 err = _nfs4_proc_setclientid_confirm(clp, cred);
3433 switch (err) {
3434 case 0:
3435 return err;
3436 case -NFS4ERR_RESOURCE:
3437 /* The IBM lawyers misread another document! */
3438 case -NFS4ERR_DELAY:
3439 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3440 }
3441 } while (err == 0);
3442 return err;
3443 }
3444
3445 struct nfs4_delegreturndata {
3446 struct nfs4_delegreturnargs args;
3447 struct nfs4_delegreturnres res;
3448 struct nfs_fh fh;
3449 nfs4_stateid stateid;
3450 unsigned long timestamp;
3451 struct nfs_fattr fattr;
3452 int rpc_status;
3453 };
3454
3455 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3456 {
3457 struct nfs4_delegreturndata *data = calldata;
3458
3459 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3460 task->tk_status);
3461
3462 data->rpc_status = task->tk_status;
3463 if (data->rpc_status == 0)
3464 renew_lease(data->res.server, data->timestamp);
3465 }
3466
3467 static void nfs4_delegreturn_release(void *calldata)
3468 {
3469 kfree(calldata);
3470 }
3471
3472 #if defined(CONFIG_NFS_V4_1)
3473 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3474 {
3475 struct nfs4_delegreturndata *d_data;
3476
3477 d_data = (struct nfs4_delegreturndata *)data;
3478
3479 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3480 &d_data->args.seq_args,
3481 &d_data->res.seq_res, 1, task))
3482 return;
3483 rpc_call_start(task);
3484 }
3485 #endif /* CONFIG_NFS_V4_1 */
3486
3487 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3488 #if defined(CONFIG_NFS_V4_1)
3489 .rpc_call_prepare = nfs4_delegreturn_prepare,
3490 #endif /* CONFIG_NFS_V4_1 */
3491 .rpc_call_done = nfs4_delegreturn_done,
3492 .rpc_release = nfs4_delegreturn_release,
3493 };
3494
3495 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3496 {
3497 struct nfs4_delegreturndata *data;
3498 struct nfs_server *server = NFS_SERVER(inode);
3499 struct rpc_task *task;
3500 struct rpc_message msg = {
3501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3502 .rpc_cred = cred,
3503 };
3504 struct rpc_task_setup task_setup_data = {
3505 .rpc_client = server->client,
3506 .rpc_message = &msg,
3507 .callback_ops = &nfs4_delegreturn_ops,
3508 .flags = RPC_TASK_ASYNC,
3509 };
3510 int status = 0;
3511
3512 data = kzalloc(sizeof(*data), GFP_KERNEL);
3513 if (data == NULL)
3514 return -ENOMEM;
3515 data->args.fhandle = &data->fh;
3516 data->args.stateid = &data->stateid;
3517 data->args.bitmask = server->attr_bitmask;
3518 nfs_copy_fh(&data->fh, NFS_FH(inode));
3519 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3520 data->res.fattr = &data->fattr;
3521 data->res.server = server;
3522 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3523 nfs_fattr_init(data->res.fattr);
3524 data->timestamp = jiffies;
3525 data->rpc_status = 0;
3526
3527 task_setup_data.callback_data = data;
3528 msg.rpc_argp = &data->args,
3529 msg.rpc_resp = &data->res,
3530 task = rpc_run_task(&task_setup_data);
3531 if (IS_ERR(task))
3532 return PTR_ERR(task);
3533 if (!issync)
3534 goto out;
3535 status = nfs4_wait_for_completion_rpc_task(task);
3536 if (status != 0)
3537 goto out;
3538 status = data->rpc_status;
3539 if (status != 0)
3540 goto out;
3541 nfs_refresh_inode(inode, &data->fattr);
3542 out:
3543 rpc_put_task(task);
3544 return status;
3545 }
3546
3547 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3548 {
3549 struct nfs_server *server = NFS_SERVER(inode);
3550 struct nfs4_exception exception = { };
3551 int err;
3552 do {
3553 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3554 switch (err) {
3555 case -NFS4ERR_STALE_STATEID:
3556 case -NFS4ERR_EXPIRED:
3557 case 0:
3558 return 0;
3559 }
3560 err = nfs4_handle_exception(server, err, &exception);
3561 } while (exception.retry);
3562 return err;
3563 }
3564
3565 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3566 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3567
3568 /*
3569 * sleep, with exponential backoff, and retry the LOCK operation.
3570 */
3571 static unsigned long
3572 nfs4_set_lock_task_retry(unsigned long timeout)
3573 {
3574 schedule_timeout_killable(timeout);
3575 timeout <<= 1;
3576 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3577 return NFS4_LOCK_MAXTIMEOUT;
3578 return timeout;
3579 }
3580
3581 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3582 {
3583 struct inode *inode = state->inode;
3584 struct nfs_server *server = NFS_SERVER(inode);
3585 struct nfs_client *clp = server->nfs_client;
3586 struct nfs_lockt_args arg = {
3587 .fh = NFS_FH(inode),
3588 .fl = request,
3589 };
3590 struct nfs_lockt_res res = {
3591 .denied = request,
3592 };
3593 struct rpc_message msg = {
3594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3595 .rpc_argp = &arg,
3596 .rpc_resp = &res,
3597 .rpc_cred = state->owner->so_cred,
3598 };
3599 struct nfs4_lock_state *lsp;
3600 int status;
3601
3602 arg.lock_owner.clientid = clp->cl_clientid;
3603 status = nfs4_set_lock_state(state, request);
3604 if (status != 0)
3605 goto out;
3606 lsp = request->fl_u.nfs4_fl.owner;
3607 arg.lock_owner.id = lsp->ls_id.id;
3608 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3609 switch (status) {
3610 case 0:
3611 request->fl_type = F_UNLCK;
3612 break;
3613 case -NFS4ERR_DENIED:
3614 status = 0;
3615 }
3616 request->fl_ops->fl_release_private(request);
3617 out:
3618 return status;
3619 }
3620
3621 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3622 {
3623 struct nfs4_exception exception = { };
3624 int err;
3625
3626 do {
3627 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3628 _nfs4_proc_getlk(state, cmd, request),
3629 &exception);
3630 } while (exception.retry);
3631 return err;
3632 }
3633
3634 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3635 {
3636 int res = 0;
3637 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3638 case FL_POSIX:
3639 res = posix_lock_file_wait(file, fl);
3640 break;
3641 case FL_FLOCK:
3642 res = flock_lock_file_wait(file, fl);
3643 break;
3644 default:
3645 BUG();
3646 }
3647 return res;
3648 }
3649
3650 struct nfs4_unlockdata {
3651 struct nfs_locku_args arg;
3652 struct nfs_locku_res res;
3653 struct nfs4_lock_state *lsp;
3654 struct nfs_open_context *ctx;
3655 struct file_lock fl;
3656 const struct nfs_server *server;
3657 unsigned long timestamp;
3658 };
3659
3660 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3661 struct nfs_open_context *ctx,
3662 struct nfs4_lock_state *lsp,
3663 struct nfs_seqid *seqid)
3664 {
3665 struct nfs4_unlockdata *p;
3666 struct inode *inode = lsp->ls_state->inode;
3667
3668 p = kzalloc(sizeof(*p), GFP_KERNEL);
3669 if (p == NULL)
3670 return NULL;
3671 p->arg.fh = NFS_FH(inode);
3672 p->arg.fl = &p->fl;
3673 p->arg.seqid = seqid;
3674 p->res.seqid = seqid;
3675 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3676 p->arg.stateid = &lsp->ls_stateid;
3677 p->lsp = lsp;
3678 atomic_inc(&lsp->ls_count);
3679 /* Ensure we don't close file until we're done freeing locks! */
3680 p->ctx = get_nfs_open_context(ctx);
3681 memcpy(&p->fl, fl, sizeof(p->fl));
3682 p->server = NFS_SERVER(inode);
3683 return p;
3684 }
3685
3686 static void nfs4_locku_release_calldata(void *data)
3687 {
3688 struct nfs4_unlockdata *calldata = data;
3689 nfs_free_seqid(calldata->arg.seqid);
3690 nfs4_put_lock_state(calldata->lsp);
3691 put_nfs_open_context(calldata->ctx);
3692 kfree(calldata);
3693 }
3694
3695 static void nfs4_locku_done(struct rpc_task *task, void *data)
3696 {
3697 struct nfs4_unlockdata *calldata = data;
3698
3699 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3700 task->tk_status);
3701 if (RPC_ASSASSINATED(task))
3702 return;
3703 switch (task->tk_status) {
3704 case 0:
3705 memcpy(calldata->lsp->ls_stateid.data,
3706 calldata->res.stateid.data,
3707 sizeof(calldata->lsp->ls_stateid.data));
3708 renew_lease(calldata->server, calldata->timestamp);
3709 break;
3710 case -NFS4ERR_BAD_STATEID:
3711 case -NFS4ERR_OLD_STATEID:
3712 case -NFS4ERR_STALE_STATEID:
3713 case -NFS4ERR_EXPIRED:
3714 break;
3715 default:
3716 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3717 nfs4_restart_rpc(task,
3718 calldata->server->nfs_client);
3719 }
3720 nfs4_sequence_free_slot(calldata->server->nfs_client,
3721 &calldata->res.seq_res);
3722 }
3723
3724 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3725 {
3726 struct nfs4_unlockdata *calldata = data;
3727
3728 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3729 return;
3730 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3731 /* Note: exit _without_ running nfs4_locku_done */
3732 task->tk_action = NULL;
3733 return;
3734 }
3735 calldata->timestamp = jiffies;
3736 if (nfs4_setup_sequence(calldata->server->nfs_client,
3737 &calldata->arg.seq_args,
3738 &calldata->res.seq_res, 1, task))
3739 return;
3740 rpc_call_start(task);
3741 }
3742
3743 static const struct rpc_call_ops nfs4_locku_ops = {
3744 .rpc_call_prepare = nfs4_locku_prepare,
3745 .rpc_call_done = nfs4_locku_done,
3746 .rpc_release = nfs4_locku_release_calldata,
3747 };
3748
3749 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3750 struct nfs_open_context *ctx,
3751 struct nfs4_lock_state *lsp,
3752 struct nfs_seqid *seqid)
3753 {
3754 struct nfs4_unlockdata *data;
3755 struct rpc_message msg = {
3756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3757 .rpc_cred = ctx->cred,
3758 };
3759 struct rpc_task_setup task_setup_data = {
3760 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3761 .rpc_message = &msg,
3762 .callback_ops = &nfs4_locku_ops,
3763 .workqueue = nfsiod_workqueue,
3764 .flags = RPC_TASK_ASYNC,
3765 };
3766
3767 /* Ensure this is an unlock - when canceling a lock, the
3768 * canceled lock is passed in, and it won't be an unlock.
3769 */
3770 fl->fl_type = F_UNLCK;
3771
3772 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3773 if (data == NULL) {
3774 nfs_free_seqid(seqid);
3775 return ERR_PTR(-ENOMEM);
3776 }
3777
3778 msg.rpc_argp = &data->arg,
3779 msg.rpc_resp = &data->res,
3780 task_setup_data.callback_data = data;
3781 return rpc_run_task(&task_setup_data);
3782 }
3783
3784 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3785 {
3786 struct nfs_inode *nfsi = NFS_I(state->inode);
3787 struct nfs_seqid *seqid;
3788 struct nfs4_lock_state *lsp;
3789 struct rpc_task *task;
3790 int status = 0;
3791 unsigned char fl_flags = request->fl_flags;
3792
3793 status = nfs4_set_lock_state(state, request);
3794 /* Unlock _before_ we do the RPC call */
3795 request->fl_flags |= FL_EXISTS;
3796 down_read(&nfsi->rwsem);
3797 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3798 up_read(&nfsi->rwsem);
3799 goto out;
3800 }
3801 up_read(&nfsi->rwsem);
3802 if (status != 0)
3803 goto out;
3804 /* Is this a delegated lock? */
3805 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3806 goto out;
3807 lsp = request->fl_u.nfs4_fl.owner;
3808 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3809 status = -ENOMEM;
3810 if (seqid == NULL)
3811 goto out;
3812 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3813 status = PTR_ERR(task);
3814 if (IS_ERR(task))
3815 goto out;
3816 status = nfs4_wait_for_completion_rpc_task(task);
3817 rpc_put_task(task);
3818 out:
3819 request->fl_flags = fl_flags;
3820 return status;
3821 }
3822
3823 struct nfs4_lockdata {
3824 struct nfs_lock_args arg;
3825 struct nfs_lock_res res;
3826 struct nfs4_lock_state *lsp;
3827 struct nfs_open_context *ctx;
3828 struct file_lock fl;
3829 unsigned long timestamp;
3830 int rpc_status;
3831 int cancelled;
3832 struct nfs_server *server;
3833 };
3834
3835 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3836 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3837 {
3838 struct nfs4_lockdata *p;
3839 struct inode *inode = lsp->ls_state->inode;
3840 struct nfs_server *server = NFS_SERVER(inode);
3841
3842 p = kzalloc(sizeof(*p), GFP_KERNEL);
3843 if (p == NULL)
3844 return NULL;
3845
3846 p->arg.fh = NFS_FH(inode);
3847 p->arg.fl = &p->fl;
3848 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3849 if (p->arg.open_seqid == NULL)
3850 goto out_free;
3851 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3852 if (p->arg.lock_seqid == NULL)
3853 goto out_free_seqid;
3854 p->arg.lock_stateid = &lsp->ls_stateid;
3855 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3856 p->arg.lock_owner.id = lsp->ls_id.id;
3857 p->res.lock_seqid = p->arg.lock_seqid;
3858 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3859 p->lsp = lsp;
3860 p->server = server;
3861 atomic_inc(&lsp->ls_count);
3862 p->ctx = get_nfs_open_context(ctx);
3863 memcpy(&p->fl, fl, sizeof(p->fl));
3864 return p;
3865 out_free_seqid:
3866 nfs_free_seqid(p->arg.open_seqid);
3867 out_free:
3868 kfree(p);
3869 return NULL;
3870 }
3871
3872 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3873 {
3874 struct nfs4_lockdata *data = calldata;
3875 struct nfs4_state *state = data->lsp->ls_state;
3876
3877 dprintk("%s: begin!\n", __func__);
3878 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3879 return;
3880 /* Do we need to do an open_to_lock_owner? */
3881 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3882 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3883 return;
3884 data->arg.open_stateid = &state->stateid;
3885 data->arg.new_lock_owner = 1;
3886 data->res.open_seqid = data->arg.open_seqid;
3887 } else
3888 data->arg.new_lock_owner = 0;
3889 data->timestamp = jiffies;
3890 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3891 &data->res.seq_res, 1, task))
3892 return;
3893 rpc_call_start(task);
3894 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3895 }
3896
3897 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3898 {
3899 struct nfs4_lockdata *data = calldata;
3900
3901 dprintk("%s: begin!\n", __func__);
3902
3903 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3904 task->tk_status);
3905
3906 data->rpc_status = task->tk_status;
3907 if (RPC_ASSASSINATED(task))
3908 goto out;
3909 if (data->arg.new_lock_owner != 0) {
3910 if (data->rpc_status == 0)
3911 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3912 else
3913 goto out;
3914 }
3915 if (data->rpc_status == 0) {
3916 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3917 sizeof(data->lsp->ls_stateid.data));
3918 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3919 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3920 }
3921 out:
3922 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3923 }
3924
3925 static void nfs4_lock_release(void *calldata)
3926 {
3927 struct nfs4_lockdata *data = calldata;
3928
3929 dprintk("%s: begin!\n", __func__);
3930 nfs_free_seqid(data->arg.open_seqid);
3931 if (data->cancelled != 0) {
3932 struct rpc_task *task;
3933 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3934 data->arg.lock_seqid);
3935 if (!IS_ERR(task))
3936 rpc_put_task(task);
3937 dprintk("%s: cancelling lock!\n", __func__);
3938 } else
3939 nfs_free_seqid(data->arg.lock_seqid);
3940 nfs4_put_lock_state(data->lsp);
3941 put_nfs_open_context(data->ctx);
3942 kfree(data);
3943 dprintk("%s: done!\n", __func__);
3944 }
3945
3946 static const struct rpc_call_ops nfs4_lock_ops = {
3947 .rpc_call_prepare = nfs4_lock_prepare,
3948 .rpc_call_done = nfs4_lock_done,
3949 .rpc_release = nfs4_lock_release,
3950 };
3951
3952 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3953 {
3954 struct nfs4_lockdata *data;
3955 struct rpc_task *task;
3956 struct rpc_message msg = {
3957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3958 .rpc_cred = state->owner->so_cred,
3959 };
3960 struct rpc_task_setup task_setup_data = {
3961 .rpc_client = NFS_CLIENT(state->inode),
3962 .rpc_message = &msg,
3963 .callback_ops = &nfs4_lock_ops,
3964 .workqueue = nfsiod_workqueue,
3965 .flags = RPC_TASK_ASYNC,
3966 };
3967 int ret;
3968
3969 dprintk("%s: begin!\n", __func__);
3970 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3971 fl->fl_u.nfs4_fl.owner);
3972 if (data == NULL)
3973 return -ENOMEM;
3974 if (IS_SETLKW(cmd))
3975 data->arg.block = 1;
3976 if (reclaim != 0)
3977 data->arg.reclaim = 1;
3978 msg.rpc_argp = &data->arg,
3979 msg.rpc_resp = &data->res,
3980 task_setup_data.callback_data = data;
3981 task = rpc_run_task(&task_setup_data);
3982 if (IS_ERR(task))
3983 return PTR_ERR(task);
3984 ret = nfs4_wait_for_completion_rpc_task(task);
3985 if (ret == 0) {
3986 ret = data->rpc_status;
3987 } else
3988 data->cancelled = 1;
3989 rpc_put_task(task);
3990 dprintk("%s: done, ret = %d!\n", __func__, ret);
3991 return ret;
3992 }
3993
3994 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3995 {
3996 struct nfs_server *server = NFS_SERVER(state->inode);
3997 struct nfs4_exception exception = { };
3998 int err;
3999
4000 do {
4001 /* Cache the lock if possible... */
4002 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4003 return 0;
4004 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4005 if (err != -NFS4ERR_DELAY)
4006 break;
4007 nfs4_handle_exception(server, err, &exception);
4008 } while (exception.retry);
4009 return err;
4010 }
4011
4012 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4013 {
4014 struct nfs_server *server = NFS_SERVER(state->inode);
4015 struct nfs4_exception exception = { };
4016 int err;
4017
4018 err = nfs4_set_lock_state(state, request);
4019 if (err != 0)
4020 return err;
4021 do {
4022 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4023 return 0;
4024 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4025 if (err != -NFS4ERR_DELAY)
4026 break;
4027 nfs4_handle_exception(server, err, &exception);
4028 } while (exception.retry);
4029 return err;
4030 }
4031
4032 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4033 {
4034 struct nfs_inode *nfsi = NFS_I(state->inode);
4035 unsigned char fl_flags = request->fl_flags;
4036 int status;
4037
4038 /* Is this a delegated open? */
4039 status = nfs4_set_lock_state(state, request);
4040 if (status != 0)
4041 goto out;
4042 request->fl_flags |= FL_ACCESS;
4043 status = do_vfs_lock(request->fl_file, request);
4044 if (status < 0)
4045 goto out;
4046 down_read(&nfsi->rwsem);
4047 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4048 /* Yes: cache locks! */
4049 /* ...but avoid races with delegation recall... */
4050 request->fl_flags = fl_flags & ~FL_SLEEP;
4051 status = do_vfs_lock(request->fl_file, request);
4052 goto out_unlock;
4053 }
4054 status = _nfs4_do_setlk(state, cmd, request, 0);
4055 if (status != 0)
4056 goto out_unlock;
4057 /* Note: we always want to sleep here! */
4058 request->fl_flags = fl_flags | FL_SLEEP;
4059 if (do_vfs_lock(request->fl_file, request) < 0)
4060 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4061 out_unlock:
4062 up_read(&nfsi->rwsem);
4063 out:
4064 request->fl_flags = fl_flags;
4065 return status;
4066 }
4067
4068 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4069 {
4070 struct nfs4_exception exception = { };
4071 int err;
4072
4073 do {
4074 err = _nfs4_proc_setlk(state, cmd, request);
4075 if (err == -NFS4ERR_DENIED)
4076 err = -EAGAIN;
4077 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4078 err, &exception);
4079 } while (exception.retry);
4080 return err;
4081 }
4082
4083 static int
4084 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4085 {
4086 struct nfs_open_context *ctx;
4087 struct nfs4_state *state;
4088 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4089 int status;
4090
4091 /* verify open state */
4092 ctx = nfs_file_open_context(filp);
4093 state = ctx->state;
4094
4095 if (request->fl_start < 0 || request->fl_end < 0)
4096 return -EINVAL;
4097
4098 if (IS_GETLK(cmd)) {
4099 if (state != NULL)
4100 return nfs4_proc_getlk(state, F_GETLK, request);
4101 return 0;
4102 }
4103
4104 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4105 return -EINVAL;
4106
4107 if (request->fl_type == F_UNLCK) {
4108 if (state != NULL)
4109 return nfs4_proc_unlck(state, cmd, request);
4110 return 0;
4111 }
4112
4113 if (state == NULL)
4114 return -ENOLCK;
4115 do {
4116 status = nfs4_proc_setlk(state, cmd, request);
4117 if ((status != -EAGAIN) || IS_SETLK(cmd))
4118 break;
4119 timeout = nfs4_set_lock_task_retry(timeout);
4120 status = -ERESTARTSYS;
4121 if (signalled())
4122 break;
4123 } while(status < 0);
4124 return status;
4125 }
4126
4127 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4128 {
4129 struct nfs_server *server = NFS_SERVER(state->inode);
4130 struct nfs4_exception exception = { };
4131 int err;
4132
4133 err = nfs4_set_lock_state(state, fl);
4134 if (err != 0)
4135 goto out;
4136 do {
4137 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4138 switch (err) {
4139 default:
4140 printk(KERN_ERR "%s: unhandled error %d.\n",
4141 __func__, err);
4142 case 0:
4143 case -ESTALE:
4144 goto out;
4145 case -NFS4ERR_EXPIRED:
4146 case -NFS4ERR_STALE_CLIENTID:
4147 case -NFS4ERR_STALE_STATEID:
4148 nfs4_schedule_state_recovery(server->nfs_client);
4149 goto out;
4150 case -ERESTARTSYS:
4151 /*
4152 * The show must go on: exit, but mark the
4153 * stateid as needing recovery.
4154 */
4155 case -NFS4ERR_ADMIN_REVOKED:
4156 case -NFS4ERR_BAD_STATEID:
4157 case -NFS4ERR_OPENMODE:
4158 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4159 err = 0;
4160 goto out;
4161 case -ENOMEM:
4162 case -NFS4ERR_DENIED:
4163 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4164 err = 0;
4165 goto out;
4166 case -NFS4ERR_DELAY:
4167 break;
4168 }
4169 err = nfs4_handle_exception(server, err, &exception);
4170 } while (exception.retry);
4171 out:
4172 return err;
4173 }
4174
4175 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4176
4177 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4178 size_t buflen, int flags)
4179 {
4180 struct inode *inode = dentry->d_inode;
4181
4182 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4183 return -EOPNOTSUPP;
4184
4185 return nfs4_proc_set_acl(inode, buf, buflen);
4186 }
4187
4188 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4189 * and that's what we'll do for e.g. user attributes that haven't been set.
4190 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4191 * attributes in kernel-managed attribute namespaces. */
4192 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4193 size_t buflen)
4194 {
4195 struct inode *inode = dentry->d_inode;
4196
4197 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4198 return -EOPNOTSUPP;
4199
4200 return nfs4_proc_get_acl(inode, buf, buflen);
4201 }
4202
4203 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4204 {
4205 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4206
4207 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4208 return 0;
4209 if (buf && buflen < len)
4210 return -ERANGE;
4211 if (buf)
4212 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4213 return len;
4214 }
4215
4216 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4217 {
4218 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4219 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4220 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4221 return;
4222
4223 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4224 NFS_ATTR_FATTR_NLINK;
4225 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4226 fattr->nlink = 2;
4227 }
4228
4229 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4230 struct nfs4_fs_locations *fs_locations, struct page *page)
4231 {
4232 struct nfs_server *server = NFS_SERVER(dir);
4233 u32 bitmask[2] = {
4234 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4235 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4236 };
4237 struct nfs4_fs_locations_arg args = {
4238 .dir_fh = NFS_FH(dir),
4239 .name = name,
4240 .page = page,
4241 .bitmask = bitmask,
4242 };
4243 struct nfs4_fs_locations_res res = {
4244 .fs_locations = fs_locations,
4245 };
4246 struct rpc_message msg = {
4247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4248 .rpc_argp = &args,
4249 .rpc_resp = &res,
4250 };
4251 int status;
4252
4253 dprintk("%s: start\n", __func__);
4254 nfs_fattr_init(&fs_locations->fattr);
4255 fs_locations->server = server;
4256 fs_locations->nlocations = 0;
4257 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4258 nfs_fixup_referral_attributes(&fs_locations->fattr);
4259 dprintk("%s: returned status = %d\n", __func__, status);
4260 return status;
4261 }
4262
4263 #ifdef CONFIG_NFS_V4_1
4264 /*
4265 * nfs4_proc_exchange_id()
4266 *
4267 * Since the clientid has expired, all compounds using sessions
4268 * associated with the stale clientid will be returning
4269 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4270 * be in some phase of session reset.
4271 */
4272 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4273 {
4274 nfs4_verifier verifier;
4275 struct nfs41_exchange_id_args args = {
4276 .client = clp,
4277 .flags = clp->cl_exchange_flags,
4278 };
4279 struct nfs41_exchange_id_res res = {
4280 .client = clp,
4281 };
4282 int status;
4283 struct rpc_message msg = {
4284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4285 .rpc_argp = &args,
4286 .rpc_resp = &res,
4287 .rpc_cred = cred,
4288 };
4289 __be32 *p;
4290
4291 dprintk("--> %s\n", __func__);
4292 BUG_ON(clp == NULL);
4293
4294 p = (u32 *)verifier.data;
4295 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4296 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4297 args.verifier = &verifier;
4298
4299 while (1) {
4300 args.id_len = scnprintf(args.id, sizeof(args.id),
4301 "%s/%s %u",
4302 clp->cl_ipaddr,
4303 rpc_peeraddr2str(clp->cl_rpcclient,
4304 RPC_DISPLAY_ADDR),
4305 clp->cl_id_uniquifier);
4306
4307 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4308
4309 if (status != NFS4ERR_CLID_INUSE)
4310 break;
4311
4312 if (signalled())
4313 break;
4314
4315 if (++clp->cl_id_uniquifier == 0)
4316 break;
4317 }
4318
4319 dprintk("<-- %s status= %d\n", __func__, status);
4320 return status;
4321 }
4322
4323 struct nfs4_get_lease_time_data {
4324 struct nfs4_get_lease_time_args *args;
4325 struct nfs4_get_lease_time_res *res;
4326 struct nfs_client *clp;
4327 };
4328
4329 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4330 void *calldata)
4331 {
4332 int ret;
4333 struct nfs4_get_lease_time_data *data =
4334 (struct nfs4_get_lease_time_data *)calldata;
4335
4336 dprintk("--> %s\n", __func__);
4337 /* just setup sequence, do not trigger session recovery
4338 since we're invoked within one */
4339 ret = nfs41_setup_sequence(data->clp->cl_session,
4340 &data->args->la_seq_args,
4341 &data->res->lr_seq_res, 0, task);
4342
4343 BUG_ON(ret == -EAGAIN);
4344 rpc_call_start(task);
4345 dprintk("<-- %s\n", __func__);
4346 }
4347
4348 /*
4349 * Called from nfs4_state_manager thread for session setup, so don't recover
4350 * from sequence operation or clientid errors.
4351 */
4352 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4353 {
4354 struct nfs4_get_lease_time_data *data =
4355 (struct nfs4_get_lease_time_data *)calldata;
4356
4357 dprintk("--> %s\n", __func__);
4358 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4359 switch (task->tk_status) {
4360 case -NFS4ERR_DELAY:
4361 case -NFS4ERR_GRACE:
4362 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4363 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4364 task->tk_status = 0;
4365 nfs4_restart_rpc(task, data->clp);
4366 return;
4367 }
4368 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4369 dprintk("<-- %s\n", __func__);
4370 }
4371
4372 struct rpc_call_ops nfs4_get_lease_time_ops = {
4373 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4374 .rpc_call_done = nfs4_get_lease_time_done,
4375 };
4376
4377 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4378 {
4379 struct rpc_task *task;
4380 struct nfs4_get_lease_time_args args;
4381 struct nfs4_get_lease_time_res res = {
4382 .lr_fsinfo = fsinfo,
4383 };
4384 struct nfs4_get_lease_time_data data = {
4385 .args = &args,
4386 .res = &res,
4387 .clp = clp,
4388 };
4389 struct rpc_message msg = {
4390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4391 .rpc_argp = &args,
4392 .rpc_resp = &res,
4393 };
4394 struct rpc_task_setup task_setup = {
4395 .rpc_client = clp->cl_rpcclient,
4396 .rpc_message = &msg,
4397 .callback_ops = &nfs4_get_lease_time_ops,
4398 .callback_data = &data
4399 };
4400 int status;
4401
4402 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4403 dprintk("--> %s\n", __func__);
4404 task = rpc_run_task(&task_setup);
4405
4406 if (IS_ERR(task))
4407 status = PTR_ERR(task);
4408 else {
4409 status = task->tk_status;
4410 rpc_put_task(task);
4411 }
4412 dprintk("<-- %s return %d\n", __func__, status);
4413
4414 return status;
4415 }
4416
4417 /*
4418 * Reset a slot table
4419 */
4420 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4421 int old_max_slots, int ivalue)
4422 {
4423 int i;
4424 int ret = 0;
4425
4426 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4427
4428 /*
4429 * Until we have dynamic slot table adjustment, insist
4430 * upon the same slot table size
4431 */
4432 if (max_slots != old_max_slots) {
4433 dprintk("%s reset slot table does't match old\n",
4434 __func__);
4435 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4436 goto out;
4437 }
4438 spin_lock(&tbl->slot_tbl_lock);
4439 for (i = 0; i < max_slots; ++i)
4440 tbl->slots[i].seq_nr = ivalue;
4441 tbl->highest_used_slotid = -1;
4442 spin_unlock(&tbl->slot_tbl_lock);
4443 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4444 tbl, tbl->slots, tbl->max_slots);
4445 out:
4446 dprintk("<-- %s: return %d\n", __func__, ret);
4447 return ret;
4448 }
4449
4450 /*
4451 * Reset the forechannel and backchannel slot tables
4452 */
4453 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4454 {
4455 int status;
4456
4457 status = nfs4_reset_slot_table(&session->fc_slot_table,
4458 session->fc_attrs.max_reqs,
4459 session->fc_slot_table.max_slots,
4460 1);
4461 if (status)
4462 return status;
4463
4464 status = nfs4_reset_slot_table(&session->bc_slot_table,
4465 session->bc_attrs.max_reqs,
4466 session->bc_slot_table.max_slots,
4467 0);
4468 return status;
4469 }
4470
4471 /* Destroy the slot table */
4472 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4473 {
4474 if (session->fc_slot_table.slots != NULL) {
4475 kfree(session->fc_slot_table.slots);
4476 session->fc_slot_table.slots = NULL;
4477 }
4478 if (session->bc_slot_table.slots != NULL) {
4479 kfree(session->bc_slot_table.slots);
4480 session->bc_slot_table.slots = NULL;
4481 }
4482 return;
4483 }
4484
4485 /*
4486 * Initialize slot table
4487 */
4488 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4489 int max_slots, int ivalue)
4490 {
4491 int i;
4492 struct nfs4_slot *slot;
4493 int ret = -ENOMEM;
4494
4495 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4496
4497 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4498
4499 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4500 if (!slot)
4501 goto out;
4502 for (i = 0; i < max_slots; ++i)
4503 slot[i].seq_nr = ivalue;
4504 ret = 0;
4505
4506 spin_lock(&tbl->slot_tbl_lock);
4507 if (tbl->slots != NULL) {
4508 spin_unlock(&tbl->slot_tbl_lock);
4509 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4510 __func__, tbl, tbl->slots);
4511 WARN_ON(1);
4512 goto out_free;
4513 }
4514 tbl->max_slots = max_slots;
4515 tbl->slots = slot;
4516 tbl->highest_used_slotid = -1; /* no slot is currently used */
4517 spin_unlock(&tbl->slot_tbl_lock);
4518 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4519 tbl, tbl->slots, tbl->max_slots);
4520 out:
4521 dprintk("<-- %s: return %d\n", __func__, ret);
4522 return ret;
4523
4524 out_free:
4525 kfree(slot);
4526 goto out;
4527 }
4528
4529 /*
4530 * Initialize the forechannel and backchannel tables
4531 */
4532 static int nfs4_init_slot_tables(struct nfs4_session *session)
4533 {
4534 int status;
4535
4536 status = nfs4_init_slot_table(&session->fc_slot_table,
4537 session->fc_attrs.max_reqs, 1);
4538 if (status)
4539 return status;
4540
4541 status = nfs4_init_slot_table(&session->bc_slot_table,
4542 session->bc_attrs.max_reqs, 0);
4543 if (status)
4544 nfs4_destroy_slot_tables(session);
4545
4546 return status;
4547 }
4548
4549 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4550 {
4551 struct nfs4_session *session;
4552 struct nfs4_slot_table *tbl;
4553
4554 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4555 if (!session)
4556 return NULL;
4557
4558 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4559 /*
4560 * The create session reply races with the server back
4561 * channel probe. Mark the client NFS_CS_SESSION_INITING
4562 * so that the client back channel can find the
4563 * nfs_client struct
4564 */
4565 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4566
4567 tbl = &session->fc_slot_table;
4568 spin_lock_init(&tbl->slot_tbl_lock);
4569 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4570
4571 tbl = &session->bc_slot_table;
4572 spin_lock_init(&tbl->slot_tbl_lock);
4573 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4574
4575 session->clp = clp;
4576 return session;
4577 }
4578
4579 void nfs4_destroy_session(struct nfs4_session *session)
4580 {
4581 nfs4_proc_destroy_session(session);
4582 dprintk("%s Destroy backchannel for xprt %p\n",
4583 __func__, session->clp->cl_rpcclient->cl_xprt);
4584 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4585 NFS41_BC_MIN_CALLBACKS);
4586 nfs4_destroy_slot_tables(session);
4587 kfree(session);
4588 }
4589
4590 /*
4591 * Initialize the values to be used by the client in CREATE_SESSION
4592 * If nfs4_init_session set the fore channel request and response sizes,
4593 * use them.
4594 *
4595 * Set the back channel max_resp_sz_cached to zero to force the client to
4596 * always set csa_cachethis to FALSE because the current implementation
4597 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4598 */
4599 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4600 {
4601 struct nfs4_session *session = args->client->cl_session;
4602 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4603 mxresp_sz = session->fc_attrs.max_resp_sz;
4604
4605 if (mxrqst_sz == 0)
4606 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4607 if (mxresp_sz == 0)
4608 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4609 /* Fore channel attributes */
4610 args->fc_attrs.headerpadsz = 0;
4611 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4612 args->fc_attrs.max_resp_sz = mxresp_sz;
4613 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4614 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4615 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4616
4617 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4618 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4619 __func__,
4620 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4621 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4622 args->fc_attrs.max_reqs);
4623
4624 /* Back channel attributes */
4625 args->bc_attrs.headerpadsz = 0;
4626 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4627 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4628 args->bc_attrs.max_resp_sz_cached = 0;
4629 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4630 args->bc_attrs.max_reqs = 1;
4631
4632 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4633 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4634 __func__,
4635 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4636 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4637 args->bc_attrs.max_reqs);
4638 }
4639
4640 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4641 {
4642 if (rcvd <= sent)
4643 return 0;
4644 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4645 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4646 return -EINVAL;
4647 }
4648
4649 #define _verify_fore_channel_attr(_name_) \
4650 _verify_channel_attr("fore", #_name_, \
4651 args->fc_attrs._name_, \
4652 session->fc_attrs._name_)
4653
4654 #define _verify_back_channel_attr(_name_) \
4655 _verify_channel_attr("back", #_name_, \
4656 args->bc_attrs._name_, \
4657 session->bc_attrs._name_)
4658
4659 /*
4660 * The server is not allowed to increase the fore channel header pad size,
4661 * maximum response size, or maximum number of operations.
4662 *
4663 * The back channel attributes are only negotiatied down: We send what the
4664 * (back channel) server insists upon.
4665 */
4666 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4667 struct nfs4_session *session)
4668 {
4669 int ret = 0;
4670
4671 ret |= _verify_fore_channel_attr(headerpadsz);
4672 ret |= _verify_fore_channel_attr(max_resp_sz);
4673 ret |= _verify_fore_channel_attr(max_ops);
4674
4675 ret |= _verify_back_channel_attr(headerpadsz);
4676 ret |= _verify_back_channel_attr(max_rqst_sz);
4677 ret |= _verify_back_channel_attr(max_resp_sz);
4678 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4679 ret |= _verify_back_channel_attr(max_ops);
4680 ret |= _verify_back_channel_attr(max_reqs);
4681
4682 return ret;
4683 }
4684
4685 static int _nfs4_proc_create_session(struct nfs_client *clp)
4686 {
4687 struct nfs4_session *session = clp->cl_session;
4688 struct nfs41_create_session_args args = {
4689 .client = clp,
4690 .cb_program = NFS4_CALLBACK,
4691 };
4692 struct nfs41_create_session_res res = {
4693 .client = clp,
4694 };
4695 struct rpc_message msg = {
4696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4697 .rpc_argp = &args,
4698 .rpc_resp = &res,
4699 };
4700 int status;
4701
4702 nfs4_init_channel_attrs(&args);
4703 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4704
4705 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4706
4707 if (!status)
4708 /* Verify the session's negotiated channel_attrs values */
4709 status = nfs4_verify_channel_attrs(&args, session);
4710 if (!status) {
4711 /* Increment the clientid slot sequence id */
4712 clp->cl_seqid++;
4713 }
4714
4715 return status;
4716 }
4717
4718 /*
4719 * Issues a CREATE_SESSION operation to the server.
4720 * It is the responsibility of the caller to verify the session is
4721 * expired before calling this routine.
4722 */
4723 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4724 {
4725 int status;
4726 unsigned *ptr;
4727 struct nfs_fsinfo fsinfo;
4728 struct nfs4_session *session = clp->cl_session;
4729
4730 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4731
4732 status = _nfs4_proc_create_session(clp);
4733 if (status)
4734 goto out;
4735
4736 /* Init or reset the fore channel */
4737 if (reset)
4738 status = nfs4_reset_slot_tables(session);
4739 else
4740 status = nfs4_init_slot_tables(session);
4741 dprintk("fore channel slot table initialization returned %d\n", status);
4742 if (status)
4743 goto out;
4744
4745 ptr = (unsigned *)&session->sess_id.data[0];
4746 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4747 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4748
4749 if (reset)
4750 /* Lease time is aleady set */
4751 goto out;
4752
4753 /* Get the lease time */
4754 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4755 if (status == 0) {
4756 /* Update lease time and schedule renewal */
4757 spin_lock(&clp->cl_lock);
4758 clp->cl_lease_time = fsinfo.lease_time * HZ;
4759 clp->cl_last_renewal = jiffies;
4760 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4761 spin_unlock(&clp->cl_lock);
4762
4763 nfs4_schedule_state_renewal(clp);
4764 }
4765 out:
4766 dprintk("<-- %s\n", __func__);
4767 return status;
4768 }
4769
4770 /*
4771 * Issue the over-the-wire RPC DESTROY_SESSION.
4772 * The caller must serialize access to this routine.
4773 */
4774 int nfs4_proc_destroy_session(struct nfs4_session *session)
4775 {
4776 int status = 0;
4777 struct rpc_message msg;
4778
4779 dprintk("--> nfs4_proc_destroy_session\n");
4780
4781 /* session is still being setup */
4782 if (session->clp->cl_cons_state != NFS_CS_READY)
4783 return status;
4784
4785 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4786 msg.rpc_argp = session;
4787 msg.rpc_resp = NULL;
4788 msg.rpc_cred = NULL;
4789 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4790
4791 if (status)
4792 printk(KERN_WARNING
4793 "Got error %d from the server on DESTROY_SESSION. "
4794 "Session has been destroyed regardless...\n", status);
4795
4796 dprintk("<-- nfs4_proc_destroy_session\n");
4797 return status;
4798 }
4799
4800 int nfs4_init_session(struct nfs_server *server)
4801 {
4802 struct nfs_client *clp = server->nfs_client;
4803 int ret;
4804
4805 if (!nfs4_has_session(clp))
4806 return 0;
4807
4808 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4809 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4810 ret = nfs4_recover_expired_lease(server);
4811 if (!ret)
4812 ret = nfs4_check_client_ready(clp);
4813 return ret;
4814 }
4815
4816 /*
4817 * Renew the cl_session lease.
4818 */
4819 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4820 {
4821 struct nfs4_sequence_args args;
4822 struct nfs4_sequence_res res;
4823
4824 struct rpc_message msg = {
4825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4826 .rpc_argp = &args,
4827 .rpc_resp = &res,
4828 .rpc_cred = cred,
4829 };
4830
4831 args.sa_cache_this = 0;
4832
4833 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4834 &res, 0);
4835 }
4836
4837 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4838 {
4839 struct nfs_client *clp = (struct nfs_client *)data;
4840
4841 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4842
4843 if (task->tk_status < 0) {
4844 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4845
4846 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4847 == -EAGAIN) {
4848 nfs4_restart_rpc(task, clp);
4849 return;
4850 }
4851 }
4852 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4853 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4854
4855 kfree(task->tk_msg.rpc_argp);
4856 kfree(task->tk_msg.rpc_resp);
4857
4858 dprintk("<-- %s\n", __func__);
4859 }
4860
4861 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4862 {
4863 struct nfs_client *clp;
4864 struct nfs4_sequence_args *args;
4865 struct nfs4_sequence_res *res;
4866
4867 clp = (struct nfs_client *)data;
4868 args = task->tk_msg.rpc_argp;
4869 res = task->tk_msg.rpc_resp;
4870
4871 if (nfs4_setup_sequence(clp, args, res, 0, task))
4872 return;
4873 rpc_call_start(task);
4874 }
4875
4876 static const struct rpc_call_ops nfs41_sequence_ops = {
4877 .rpc_call_done = nfs41_sequence_call_done,
4878 .rpc_call_prepare = nfs41_sequence_prepare,
4879 };
4880
4881 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4882 struct rpc_cred *cred)
4883 {
4884 struct nfs4_sequence_args *args;
4885 struct nfs4_sequence_res *res;
4886 struct rpc_message msg = {
4887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4888 .rpc_cred = cred,
4889 };
4890
4891 args = kzalloc(sizeof(*args), GFP_KERNEL);
4892 if (!args)
4893 return -ENOMEM;
4894 res = kzalloc(sizeof(*res), GFP_KERNEL);
4895 if (!res) {
4896 kfree(args);
4897 return -ENOMEM;
4898 }
4899 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4900 msg.rpc_argp = args;
4901 msg.rpc_resp = res;
4902
4903 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4904 &nfs41_sequence_ops, (void *)clp);
4905 }
4906
4907 #endif /* CONFIG_NFS_V4_1 */
4908
4909 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4910 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4911 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4912 .recover_open = nfs4_open_reclaim,
4913 .recover_lock = nfs4_lock_reclaim,
4914 .establish_clid = nfs4_init_clientid,
4915 .get_clid_cred = nfs4_get_setclientid_cred,
4916 };
4917
4918 #if defined(CONFIG_NFS_V4_1)
4919 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4920 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4921 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4922 .recover_open = nfs4_open_reclaim,
4923 .recover_lock = nfs4_lock_reclaim,
4924 .establish_clid = nfs4_proc_exchange_id,
4925 .get_clid_cred = nfs4_get_exchange_id_cred,
4926 };
4927 #endif /* CONFIG_NFS_V4_1 */
4928
4929 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4930 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4931 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4932 .recover_open = nfs4_open_expired,
4933 .recover_lock = nfs4_lock_expired,
4934 .establish_clid = nfs4_init_clientid,
4935 .get_clid_cred = nfs4_get_setclientid_cred,
4936 };
4937
4938 #if defined(CONFIG_NFS_V4_1)
4939 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
4940 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4941 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4942 .recover_open = nfs4_open_expired,
4943 .recover_lock = nfs4_lock_expired,
4944 .establish_clid = nfs4_proc_exchange_id,
4945 .get_clid_cred = nfs4_get_exchange_id_cred,
4946 };
4947 #endif /* CONFIG_NFS_V4_1 */
4948
4949 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4950 .sched_state_renewal = nfs4_proc_async_renew,
4951 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
4952 .renew_lease = nfs4_proc_renew,
4953 };
4954
4955 #if defined(CONFIG_NFS_V4_1)
4956 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4957 .sched_state_renewal = nfs41_proc_async_sequence,
4958 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
4959 .renew_lease = nfs4_proc_sequence,
4960 };
4961 #endif
4962
4963 /*
4964 * Per minor version reboot and network partition recovery ops
4965 */
4966
4967 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4968 &nfs40_reboot_recovery_ops,
4969 #if defined(CONFIG_NFS_V4_1)
4970 &nfs41_reboot_recovery_ops,
4971 #endif
4972 };
4973
4974 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4975 &nfs40_nograce_recovery_ops,
4976 #if defined(CONFIG_NFS_V4_1)
4977 &nfs41_nograce_recovery_ops,
4978 #endif
4979 };
4980
4981 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4982 &nfs40_state_renewal_ops,
4983 #if defined(CONFIG_NFS_V4_1)
4984 &nfs41_state_renewal_ops,
4985 #endif
4986 };
4987
4988 static const struct inode_operations nfs4_file_inode_operations = {
4989 .permission = nfs_permission,
4990 .getattr = nfs_getattr,
4991 .setattr = nfs_setattr,
4992 .getxattr = nfs4_getxattr,
4993 .setxattr = nfs4_setxattr,
4994 .listxattr = nfs4_listxattr,
4995 };
4996
4997 const struct nfs_rpc_ops nfs_v4_clientops = {
4998 .version = 4, /* protocol version */
4999 .dentry_ops = &nfs4_dentry_operations,
5000 .dir_inode_ops = &nfs4_dir_inode_operations,
5001 .file_inode_ops = &nfs4_file_inode_operations,
5002 .getroot = nfs4_proc_get_root,
5003 .getattr = nfs4_proc_getattr,
5004 .setattr = nfs4_proc_setattr,
5005 .lookupfh = nfs4_proc_lookupfh,
5006 .lookup = nfs4_proc_lookup,
5007 .access = nfs4_proc_access,
5008 .readlink = nfs4_proc_readlink,
5009 .create = nfs4_proc_create,
5010 .remove = nfs4_proc_remove,
5011 .unlink_setup = nfs4_proc_unlink_setup,
5012 .unlink_done = nfs4_proc_unlink_done,
5013 .rename = nfs4_proc_rename,
5014 .link = nfs4_proc_link,
5015 .symlink = nfs4_proc_symlink,
5016 .mkdir = nfs4_proc_mkdir,
5017 .rmdir = nfs4_proc_remove,
5018 .readdir = nfs4_proc_readdir,
5019 .mknod = nfs4_proc_mknod,
5020 .statfs = nfs4_proc_statfs,
5021 .fsinfo = nfs4_proc_fsinfo,
5022 .pathconf = nfs4_proc_pathconf,
5023 .set_capabilities = nfs4_server_capabilities,
5024 .decode_dirent = nfs4_decode_dirent,
5025 .read_setup = nfs4_proc_read_setup,
5026 .read_done = nfs4_read_done,
5027 .write_setup = nfs4_proc_write_setup,
5028 .write_done = nfs4_write_done,
5029 .commit_setup = nfs4_proc_commit_setup,
5030 .commit_done = nfs4_commit_done,
5031 .lock = nfs4_proc_lock,
5032 .clear_acl_cache = nfs4_zap_acl_attr,
5033 .close_context = nfs4_close_context,
5034 };
5035
5036 /*
5037 * Local variables:
5038 * c-basic-offset: 8
5039 * End:
5040 */
5041
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