projects / linux-2.6-block.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
SUNRPC: Use RCU to dereference the rpc_clnt.cl_xprt field
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
... / ...
CommitLineData
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/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
45#include <linux/sunrpc/clnt.h>
46#include <linux/sunrpc/gss_api.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
51#include <linux/nfs_mount.h>
52#include <linux/namei.h>
53#include <linux/mount.h>
54#include <linux/module.h>
55#include <linux/nfs_idmap.h>
56#include <linux/sunrpc/bc_xprt.h>
57#include <linux/xattr.h>
58#include <linux/utsname.h>
59#include <linux/freezer.h>
60
61#include "nfs4_fs.h"
62#include "delegation.h"
63#include "internal.h"
64#include "iostat.h"
65#include "callback.h"
66#include "pnfs.h"
67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
70#define NFS4_POLL_RETRY_MIN (HZ/10)
71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
77struct nfs4_opendata;
78static int _nfs4_proc_open(struct nfs4_opendata *data);
79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86#ifdef CONFIG_NFS_V4_1
87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89#endif
90/* Prevent leaks of NFSv4 errors into userland */
91static int nfs4_map_errors(int err)
92{
93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
103 default:
104 dprintk("%s could not handle NFSv4 error %d\n",
105 __func__, -err);
106 break;
107 }
108 return -EIO;
109}
110
111/*
112 * This is our standard bitmap for GETATTR requests.
113 */
114const u32 nfs4_fattr_bitmap[2] = {
115 FATTR4_WORD0_TYPE
116 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_SIZE
118 | FATTR4_WORD0_FSID
119 | FATTR4_WORD0_FILEID,
120 FATTR4_WORD1_MODE
121 | FATTR4_WORD1_NUMLINKS
122 | FATTR4_WORD1_OWNER
123 | FATTR4_WORD1_OWNER_GROUP
124 | FATTR4_WORD1_RAWDEV
125 | FATTR4_WORD1_SPACE_USED
126 | FATTR4_WORD1_TIME_ACCESS
127 | FATTR4_WORD1_TIME_METADATA
128 | FATTR4_WORD1_TIME_MODIFY
129};
130
131const u32 nfs4_statfs_bitmap[2] = {
132 FATTR4_WORD0_FILES_AVAIL
133 | FATTR4_WORD0_FILES_FREE
134 | FATTR4_WORD0_FILES_TOTAL,
135 FATTR4_WORD1_SPACE_AVAIL
136 | FATTR4_WORD1_SPACE_FREE
137 | FATTR4_WORD1_SPACE_TOTAL
138};
139
140const u32 nfs4_pathconf_bitmap[2] = {
141 FATTR4_WORD0_MAXLINK
142 | FATTR4_WORD0_MAXNAME,
143 0
144};
145
146const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
147 | FATTR4_WORD0_MAXREAD
148 | FATTR4_WORD0_MAXWRITE
149 | FATTR4_WORD0_LEASE_TIME,
150 FATTR4_WORD1_TIME_DELTA
151 | FATTR4_WORD1_FS_LAYOUT_TYPES,
152 FATTR4_WORD2_LAYOUT_BLKSIZE
153};
154
155const u32 nfs4_fs_locations_bitmap[2] = {
156 FATTR4_WORD0_TYPE
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_SIZE
159 | FATTR4_WORD0_FSID
160 | FATTR4_WORD0_FILEID
161 | FATTR4_WORD0_FS_LOCATIONS,
162 FATTR4_WORD1_MODE
163 | FATTR4_WORD1_NUMLINKS
164 | FATTR4_WORD1_OWNER
165 | FATTR4_WORD1_OWNER_GROUP
166 | FATTR4_WORD1_RAWDEV
167 | FATTR4_WORD1_SPACE_USED
168 | FATTR4_WORD1_TIME_ACCESS
169 | FATTR4_WORD1_TIME_METADATA
170 | FATTR4_WORD1_TIME_MODIFY
171 | FATTR4_WORD1_MOUNTED_ON_FILEID
172};
173
174static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
175 struct nfs4_readdir_arg *readdir)
176{
177 __be32 *start, *p;
178
179 BUG_ON(readdir->count < 80);
180 if (cookie > 2) {
181 readdir->cookie = cookie;
182 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
183 return;
184 }
185
186 readdir->cookie = 0;
187 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
188 if (cookie == 2)
189 return;
190
191 /*
192 * NFSv4 servers do not return entries for '.' and '..'
193 * Therefore, we fake these entries here. We let '.'
194 * have cookie 0 and '..' have cookie 1. Note that
195 * when talking to the server, we always send cookie 0
196 * instead of 1 or 2.
197 */
198 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199
200 if (cookie == 0) {
201 *p++ = xdr_one; /* next */
202 *p++ = xdr_zero; /* cookie, first word */
203 *p++ = xdr_one; /* cookie, second word */
204 *p++ = xdr_one; /* entry len */
205 memcpy(p, ".\0\0\0", 4); /* entry */
206 p++;
207 *p++ = xdr_one; /* bitmap length */
208 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
209 *p++ = htonl(8); /* attribute buffer length */
210 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 }
212
213 *p++ = xdr_one; /* next */
214 *p++ = xdr_zero; /* cookie, first word */
215 *p++ = xdr_two; /* cookie, second word */
216 *p++ = xdr_two; /* entry len */
217 memcpy(p, "..\0\0", 4); /* entry */
218 p++;
219 *p++ = xdr_one; /* bitmap length */
220 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
221 *p++ = htonl(8); /* attribute buffer length */
222 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
223
224 readdir->pgbase = (char *)p - (char *)start;
225 readdir->count -= readdir->pgbase;
226 kunmap_atomic(start, KM_USER0);
227}
228
229static int nfs4_wait_clnt_recover(struct nfs_client *clp)
230{
231 int res;
232
233 might_sleep();
234
235 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
236 nfs_wait_bit_killable, TASK_KILLABLE);
237 return res;
238}
239
240static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
241{
242 int res = 0;
243
244 might_sleep();
245
246 if (*timeout <= 0)
247 *timeout = NFS4_POLL_RETRY_MIN;
248 if (*timeout > NFS4_POLL_RETRY_MAX)
249 *timeout = NFS4_POLL_RETRY_MAX;
250 freezable_schedule_timeout_killable(*timeout);
251 if (fatal_signal_pending(current))
252 res = -ERESTARTSYS;
253 *timeout <<= 1;
254 return res;
255}
256
257/* This is the error handling routine for processes that are allowed
258 * to sleep.
259 */
260static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
261{
262 struct nfs_client *clp = server->nfs_client;
263 struct nfs4_state *state = exception->state;
264 int ret = errorcode;
265
266 exception->retry = 0;
267 switch(errorcode) {
268 case 0:
269 return 0;
270 case -NFS4ERR_ADMIN_REVOKED:
271 case -NFS4ERR_BAD_STATEID:
272 case -NFS4ERR_OPENMODE:
273 if (state == NULL)
274 break;
275 nfs4_schedule_stateid_recovery(server, state);
276 goto wait_on_recovery;
277 case -NFS4ERR_EXPIRED:
278 if (state != NULL)
279 nfs4_schedule_stateid_recovery(server, state);
280 case -NFS4ERR_STALE_STATEID:
281 case -NFS4ERR_STALE_CLIENTID:
282 nfs4_schedule_lease_recovery(clp);
283 goto wait_on_recovery;
284#if defined(CONFIG_NFS_V4_1)
285 case -NFS4ERR_BADSESSION:
286 case -NFS4ERR_BADSLOT:
287 case -NFS4ERR_BAD_HIGH_SLOT:
288 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
289 case -NFS4ERR_DEADSESSION:
290 case -NFS4ERR_SEQ_FALSE_RETRY:
291 case -NFS4ERR_SEQ_MISORDERED:
292 dprintk("%s ERROR: %d Reset session\n", __func__,
293 errorcode);
294 nfs4_schedule_session_recovery(clp->cl_session);
295 exception->retry = 1;
296 break;
297#endif /* defined(CONFIG_NFS_V4_1) */
298 case -NFS4ERR_FILE_OPEN:
299 if (exception->timeout > HZ) {
300 /* We have retried a decent amount, time to
301 * fail
302 */
303 ret = -EBUSY;
304 break;
305 }
306 case -NFS4ERR_GRACE:
307 case -NFS4ERR_DELAY:
308 case -EKEYEXPIRED:
309 ret = nfs4_delay(server->client, &exception->timeout);
310 if (ret != 0)
311 break;
312 case -NFS4ERR_RETRY_UNCACHED_REP:
313 case -NFS4ERR_OLD_STATEID:
314 exception->retry = 1;
315 break;
316 case -NFS4ERR_BADOWNER:
317 /* The following works around a Linux server bug! */
318 case -NFS4ERR_BADNAME:
319 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
320 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
321 exception->retry = 1;
322 printk(KERN_WARNING "NFS: v4 server %s "
323 "does not accept raw "
324 "uid/gids. "
325 "Reenabling the idmapper.\n",
326 server->nfs_client->cl_hostname);
327 }
328 }
329 /* We failed to handle the error */
330 return nfs4_map_errors(ret);
331wait_on_recovery:
332 ret = nfs4_wait_clnt_recover(clp);
333 if (ret == 0)
334 exception->retry = 1;
335 return ret;
336}
337
338
339static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
340{
341 spin_lock(&clp->cl_lock);
342 if (time_before(clp->cl_last_renewal,timestamp))
343 clp->cl_last_renewal = timestamp;
344 spin_unlock(&clp->cl_lock);
345}
346
347static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
348{
349 do_renew_lease(server->nfs_client, timestamp);
350}
351
352#if defined(CONFIG_NFS_V4_1)
353
354/*
355 * nfs4_free_slot - free a slot and efficiently update slot table.
356 *
357 * freeing a slot is trivially done by clearing its respective bit
358 * in the bitmap.
359 * If the freed slotid equals highest_used_slotid we want to update it
360 * so that the server would be able to size down the slot table if needed,
361 * otherwise we know that the highest_used_slotid is still in use.
362 * When updating highest_used_slotid there may be "holes" in the bitmap
363 * so we need to scan down from highest_used_slotid to 0 looking for the now
364 * highest slotid in use.
365 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
366 *
367 * Must be called while holding tbl->slot_tbl_lock
368 */
369static void
370nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
371{
372 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
375
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
379 if (slotid < tbl->max_slots)
380 tbl->highest_used_slotid = slotid;
381 else
382 tbl->highest_used_slotid = NFS4_NO_SLOT;
383 }
384 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
385 slotid, tbl->highest_used_slotid);
386}
387
388bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
389{
390 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
391 return true;
392}
393
394/*
395 * Signal state manager thread if session fore channel is drained
396 */
397static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
398{
399 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
400 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
401 nfs4_set_task_privileged, NULL);
402 return;
403 }
404
405 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
406 return;
407
408 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
409 complete(&ses->fc_slot_table.complete);
410}
411
412/*
413 * Signal state manager thread if session back channel is drained
414 */
415void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
416{
417 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
418 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
419 return;
420 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
421 complete(&ses->bc_slot_table.complete);
422}
423
424static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
425{
426 struct nfs4_slot_table *tbl;
427
428 tbl = &res->sr_session->fc_slot_table;
429 if (!res->sr_slot) {
430 /* just wake up the next guy waiting since
431 * we may have not consumed a slot after all */
432 dprintk("%s: No slot\n", __func__);
433 return;
434 }
435
436 spin_lock(&tbl->slot_tbl_lock);
437 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
438 nfs4_check_drain_fc_complete(res->sr_session);
439 spin_unlock(&tbl->slot_tbl_lock);
440 res->sr_slot = NULL;
441}
442
443static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
444{
445 unsigned long timestamp;
446 struct nfs_client *clp;
447
448 /*
449 * sr_status remains 1 if an RPC level error occurred. The server
450 * may or may not have processed the sequence operation..
451 * Proceed as if the server received and processed the sequence
452 * operation.
453 */
454 if (res->sr_status == 1)
455 res->sr_status = NFS_OK;
456
457 /* don't increment the sequence number if the task wasn't sent */
458 if (!RPC_WAS_SENT(task))
459 goto out;
460
461 /* Check the SEQUENCE operation status */
462 switch (res->sr_status) {
463 case 0:
464 /* Update the slot's sequence and clientid lease timer */
465 ++res->sr_slot->seq_nr;
466 timestamp = res->sr_renewal_time;
467 clp = res->sr_session->clp;
468 do_renew_lease(clp, timestamp);
469 /* Check sequence flags */
470 if (res->sr_status_flags != 0)
471 nfs4_schedule_lease_recovery(clp);
472 break;
473 case -NFS4ERR_DELAY:
474 /* The server detected a resend of the RPC call and
475 * returned NFS4ERR_DELAY as per Section 2.10.6.2
476 * of RFC5661.
477 */
478 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
479 __func__,
480 res->sr_slot - res->sr_session->fc_slot_table.slots,
481 res->sr_slot->seq_nr);
482 goto out_retry;
483 default:
484 /* Just update the slot sequence no. */
485 ++res->sr_slot->seq_nr;
486 }
487out:
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
490 nfs41_sequence_free_slot(res);
491 return 1;
492out_retry:
493 if (!rpc_restart_call(task))
494 goto out;
495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
496 return 0;
497}
498
499static int nfs4_sequence_done(struct rpc_task *task,
500 struct nfs4_sequence_res *res)
501{
502 if (res->sr_session == NULL)
503 return 1;
504 return nfs41_sequence_done(task, res);
505}
506
507/*
508 * nfs4_find_slot - efficiently look for a free slot
509 *
510 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
511 * If found, we mark the slot as used, update the highest_used_slotid,
512 * and respectively set up the sequence operation args.
513 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
514 *
515 * Note: must be called with under the slot_tbl_lock.
516 */
517static u32
518nfs4_find_slot(struct nfs4_slot_table *tbl)
519{
520 u32 slotid;
521 u32 ret_id = NFS4_NO_SLOT;
522
523 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
524 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
525 tbl->max_slots);
526 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
527 if (slotid >= tbl->max_slots)
528 goto out;
529 __set_bit(slotid, tbl->used_slots);
530 if (slotid > tbl->highest_used_slotid ||
531 tbl->highest_used_slotid == NFS4_NO_SLOT)
532 tbl->highest_used_slotid = slotid;
533 ret_id = slotid;
534out:
535 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
536 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
537 return ret_id;
538}
539
540static void nfs41_init_sequence(struct nfs4_sequence_args *args,
541 struct nfs4_sequence_res *res, int cache_reply)
542{
543 args->sa_session = NULL;
544 args->sa_cache_this = 0;
545 if (cache_reply)
546 args->sa_cache_this = 1;
547 res->sr_session = NULL;
548 res->sr_slot = NULL;
549}
550
551int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
555{
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
558 u32 slotid;
559
560 dprintk("--> %s\n", __func__);
561 /* slot already allocated? */
562 if (res->sr_slot != NULL)
563 return 0;
564
565 tbl = &session->fc_slot_table;
566
567 spin_lock(&tbl->slot_tbl_lock);
568 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
569 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
570 /* The state manager will wait until the slot table is empty */
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("%s session is draining\n", __func__);
574 return -EAGAIN;
575 }
576
577 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
578 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
579 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
580 spin_unlock(&tbl->slot_tbl_lock);
581 dprintk("%s enforce FIFO order\n", __func__);
582 return -EAGAIN;
583 }
584
585 slotid = nfs4_find_slot(tbl);
586 if (slotid == NFS4_NO_SLOT) {
587 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
588 spin_unlock(&tbl->slot_tbl_lock);
589 dprintk("<-- %s: no free slots\n", __func__);
590 return -EAGAIN;
591 }
592 spin_unlock(&tbl->slot_tbl_lock);
593
594 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
595 slot = tbl->slots + slotid;
596 args->sa_session = session;
597 args->sa_slotid = slotid;
598
599 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
600
601 res->sr_session = session;
602 res->sr_slot = slot;
603 res->sr_renewal_time = jiffies;
604 res->sr_status_flags = 0;
605 /*
606 * sr_status is only set in decode_sequence, and so will remain
607 * set to 1 if an rpc level failure occurs.
608 */
609 res->sr_status = 1;
610 return 0;
611}
612EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
613
614int nfs4_setup_sequence(const struct nfs_server *server,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 struct rpc_task *task)
618{
619 struct nfs4_session *session = nfs4_get_session(server);
620 int ret = 0;
621
622 if (session == NULL)
623 goto out;
624
625 dprintk("--> %s clp %p session %p sr_slot %td\n",
626 __func__, session->clp, session, res->sr_slot ?
627 res->sr_slot - session->fc_slot_table.slots : -1);
628
629 ret = nfs41_setup_sequence(session, args, res, task);
630out:
631 dprintk("<-- %s status=%d\n", __func__, ret);
632 return ret;
633}
634
635struct nfs41_call_sync_data {
636 const struct nfs_server *seq_server;
637 struct nfs4_sequence_args *seq_args;
638 struct nfs4_sequence_res *seq_res;
639};
640
641static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
642{
643 struct nfs41_call_sync_data *data = calldata;
644
645 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
646
647 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
648 data->seq_res, task))
649 return;
650 rpc_call_start(task);
651}
652
653static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
654{
655 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
656 nfs41_call_sync_prepare(task, calldata);
657}
658
659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
663 nfs41_sequence_done(task, data->seq_res);
664}
665
666struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
669};
670
671struct rpc_call_ops nfs41_call_priv_sync_ops = {
672 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
673 .rpc_call_done = nfs41_call_sync_done,
674};
675
676static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
677 struct nfs_server *server,
678 struct rpc_message *msg,
679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
681 int privileged)
682{
683 int ret;
684 struct rpc_task *task;
685 struct nfs41_call_sync_data data = {
686 .seq_server = server,
687 .seq_args = args,
688 .seq_res = res,
689 };
690 struct rpc_task_setup task_setup = {
691 .rpc_client = clnt,
692 .rpc_message = msg,
693 .callback_ops = &nfs41_call_sync_ops,
694 .callback_data = &data
695 };
696
697 if (privileged)
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
699 task = rpc_run_task(&task_setup);
700 if (IS_ERR(task))
701 ret = PTR_ERR(task);
702 else {
703 ret = task->tk_status;
704 rpc_put_task(task);
705 }
706 return ret;
707}
708
709int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
714 int cache_reply)
715{
716 nfs41_init_sequence(args, res, cache_reply);
717 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
718}
719
720#else
721static inline
722void nfs41_init_sequence(struct nfs4_sequence_args *args,
723 struct nfs4_sequence_res *res, int cache_reply)
724{
725}
726
727static int nfs4_sequence_done(struct rpc_task *task,
728 struct nfs4_sequence_res *res)
729{
730 return 1;
731}
732#endif /* CONFIG_NFS_V4_1 */
733
734int _nfs4_call_sync(struct rpc_clnt *clnt,
735 struct nfs_server *server,
736 struct rpc_message *msg,
737 struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res,
739 int cache_reply)
740{
741 nfs41_init_sequence(args, res, cache_reply);
742 return rpc_call_sync(clnt, msg, 0);
743}
744
745static inline
746int nfs4_call_sync(struct rpc_clnt *clnt,
747 struct nfs_server *server,
748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
751 int cache_reply)
752{
753 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
754 args, res, cache_reply);
755}
756
757static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
758{
759 struct nfs_inode *nfsi = NFS_I(dir);
760
761 spin_lock(&dir->i_lock);
762 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
763 if (!cinfo->atomic || cinfo->before != dir->i_version)
764 nfs_force_lookup_revalidate(dir);
765 dir->i_version = cinfo->after;
766 spin_unlock(&dir->i_lock);
767}
768
769struct nfs4_opendata {
770 struct kref kref;
771 struct nfs_openargs o_arg;
772 struct nfs_openres o_res;
773 struct nfs_open_confirmargs c_arg;
774 struct nfs_open_confirmres c_res;
775 struct nfs4_string owner_name;
776 struct nfs4_string group_name;
777 struct nfs_fattr f_attr;
778 struct nfs_fattr dir_attr;
779 struct dentry *dir;
780 struct dentry *dentry;
781 struct nfs4_state_owner *owner;
782 struct nfs4_state *state;
783 struct iattr attrs;
784 unsigned long timestamp;
785 unsigned int rpc_done : 1;
786 int rpc_status;
787 int cancelled;
788};
789
790
791static void nfs4_init_opendata_res(struct nfs4_opendata *p)
792{
793 p->o_res.f_attr = &p->f_attr;
794 p->o_res.dir_attr = &p->dir_attr;
795 p->o_res.seqid = p->o_arg.seqid;
796 p->c_res.seqid = p->c_arg.seqid;
797 p->o_res.server = p->o_arg.server;
798 nfs_fattr_init(&p->f_attr);
799 nfs_fattr_init(&p->dir_attr);
800 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
801}
802
803static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
804 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
805 const struct iattr *attrs,
806 gfp_t gfp_mask)
807{
808 struct dentry *parent = dget_parent(dentry);
809 struct inode *dir = parent->d_inode;
810 struct nfs_server *server = NFS_SERVER(dir);
811 struct nfs4_opendata *p;
812
813 p = kzalloc(sizeof(*p), gfp_mask);
814 if (p == NULL)
815 goto err;
816 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
817 if (p->o_arg.seqid == NULL)
818 goto err_free;
819 nfs_sb_active(dentry->d_sb);
820 p->dentry = dget(dentry);
821 p->dir = parent;
822 p->owner = sp;
823 atomic_inc(&sp->so_count);
824 p->o_arg.fh = NFS_FH(dir);
825 p->o_arg.open_flags = flags;
826 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
827 p->o_arg.clientid = server->nfs_client->cl_clientid;
828 p->o_arg.id = sp->so_seqid.owner_id;
829 p->o_arg.name = &dentry->d_name;
830 p->o_arg.server = server;
831 p->o_arg.bitmask = server->attr_bitmask;
832 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
833 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
834 if (attrs != NULL && attrs->ia_valid != 0) {
835 u32 *s;
836
837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
839 s = (u32 *) p->o_arg.u.verifier.data;
840 s[0] = jiffies;
841 s[1] = current->pid;
842 }
843 p->c_arg.fh = &p->o_res.fh;
844 p->c_arg.stateid = &p->o_res.stateid;
845 p->c_arg.seqid = p->o_arg.seqid;
846 nfs4_init_opendata_res(p);
847 kref_init(&p->kref);
848 return p;
849err_free:
850 kfree(p);
851err:
852 dput(parent);
853 return NULL;
854}
855
856static void nfs4_opendata_free(struct kref *kref)
857{
858 struct nfs4_opendata *p = container_of(kref,
859 struct nfs4_opendata, kref);
860 struct super_block *sb = p->dentry->d_sb;
861
862 nfs_free_seqid(p->o_arg.seqid);
863 if (p->state != NULL)
864 nfs4_put_open_state(p->state);
865 nfs4_put_state_owner(p->owner);
866 dput(p->dir);
867 dput(p->dentry);
868 nfs_sb_deactive(sb);
869 nfs_fattr_free_names(&p->f_attr);
870 kfree(p);
871}
872
873static void nfs4_opendata_put(struct nfs4_opendata *p)
874{
875 if (p != NULL)
876 kref_put(&p->kref, nfs4_opendata_free);
877}
878
879static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
880{
881 int ret;
882
883 ret = rpc_wait_for_completion_task(task);
884 return ret;
885}
886
887static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
888{
889 int ret = 0;
890
891 if (open_mode & (O_EXCL|O_TRUNC))
892 goto out;
893 switch (mode & (FMODE_READ|FMODE_WRITE)) {
894 case FMODE_READ:
895 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
896 && state->n_rdonly != 0;
897 break;
898 case FMODE_WRITE:
899 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
900 && state->n_wronly != 0;
901 break;
902 case FMODE_READ|FMODE_WRITE:
903 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
904 && state->n_rdwr != 0;
905 }
906out:
907 return ret;
908}
909
910static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
911{
912 if (delegation == NULL)
913 return 0;
914 if ((delegation->type & fmode) != fmode)
915 return 0;
916 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
917 return 0;
918 nfs_mark_delegation_referenced(delegation);
919 return 1;
920}
921
922static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
923{
924 switch (fmode) {
925 case FMODE_WRITE:
926 state->n_wronly++;
927 break;
928 case FMODE_READ:
929 state->n_rdonly++;
930 break;
931 case FMODE_READ|FMODE_WRITE:
932 state->n_rdwr++;
933 }
934 nfs4_state_set_mode_locked(state, state->state | fmode);
935}
936
937static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
938{
939 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
940 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
941 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
942 switch (fmode) {
943 case FMODE_READ:
944 set_bit(NFS_O_RDONLY_STATE, &state->flags);
945 break;
946 case FMODE_WRITE:
947 set_bit(NFS_O_WRONLY_STATE, &state->flags);
948 break;
949 case FMODE_READ|FMODE_WRITE:
950 set_bit(NFS_O_RDWR_STATE, &state->flags);
951 }
952}
953
954static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
955{
956 write_seqlock(&state->seqlock);
957 nfs_set_open_stateid_locked(state, stateid, fmode);
958 write_sequnlock(&state->seqlock);
959}
960
961static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
962{
963 /*
964 * Protect the call to nfs4_state_set_mode_locked and
965 * serialise the stateid update
966 */
967 write_seqlock(&state->seqlock);
968 if (deleg_stateid != NULL) {
969 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
970 set_bit(NFS_DELEGATED_STATE, &state->flags);
971 }
972 if (open_stateid != NULL)
973 nfs_set_open_stateid_locked(state, open_stateid, fmode);
974 write_sequnlock(&state->seqlock);
975 spin_lock(&state->owner->so_lock);
976 update_open_stateflags(state, fmode);
977 spin_unlock(&state->owner->so_lock);
978}
979
980static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
981{
982 struct nfs_inode *nfsi = NFS_I(state->inode);
983 struct nfs_delegation *deleg_cur;
984 int ret = 0;
985
986 fmode &= (FMODE_READ|FMODE_WRITE);
987
988 rcu_read_lock();
989 deleg_cur = rcu_dereference(nfsi->delegation);
990 if (deleg_cur == NULL)
991 goto no_delegation;
992
993 spin_lock(&deleg_cur->lock);
994 if (nfsi->delegation != deleg_cur ||
995 (deleg_cur->type & fmode) != fmode)
996 goto no_delegation_unlock;
997
998 if (delegation == NULL)
999 delegation = &deleg_cur->stateid;
1000 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1001 goto no_delegation_unlock;
1002
1003 nfs_mark_delegation_referenced(deleg_cur);
1004 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1005 ret = 1;
1006no_delegation_unlock:
1007 spin_unlock(&deleg_cur->lock);
1008no_delegation:
1009 rcu_read_unlock();
1010
1011 if (!ret && open_stateid != NULL) {
1012 __update_open_stateid(state, open_stateid, NULL, fmode);
1013 ret = 1;
1014 }
1015
1016 return ret;
1017}
1018
1019
1020static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1021{
1022 struct nfs_delegation *delegation;
1023
1024 rcu_read_lock();
1025 delegation = rcu_dereference(NFS_I(inode)->delegation);
1026 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1027 rcu_read_unlock();
1028 return;
1029 }
1030 rcu_read_unlock();
1031 nfs_inode_return_delegation(inode);
1032}
1033
1034static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1035{
1036 struct nfs4_state *state = opendata->state;
1037 struct nfs_inode *nfsi = NFS_I(state->inode);
1038 struct nfs_delegation *delegation;
1039 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1040 fmode_t fmode = opendata->o_arg.fmode;
1041 nfs4_stateid stateid;
1042 int ret = -EAGAIN;
1043
1044 for (;;) {
1045 if (can_open_cached(state, fmode, open_mode)) {
1046 spin_lock(&state->owner->so_lock);
1047 if (can_open_cached(state, fmode, open_mode)) {
1048 update_open_stateflags(state, fmode);
1049 spin_unlock(&state->owner->so_lock);
1050 goto out_return_state;
1051 }
1052 spin_unlock(&state->owner->so_lock);
1053 }
1054 rcu_read_lock();
1055 delegation = rcu_dereference(nfsi->delegation);
1056 if (!can_open_delegated(delegation, fmode)) {
1057 rcu_read_unlock();
1058 break;
1059 }
1060 /* Save the delegation */
1061 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1062 rcu_read_unlock();
1063 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1064 if (ret != 0)
1065 goto out;
1066 ret = -EAGAIN;
1067
1068 /* Try to update the stateid using the delegation */
1069 if (update_open_stateid(state, NULL, &stateid, fmode))
1070 goto out_return_state;
1071 }
1072out:
1073 return ERR_PTR(ret);
1074out_return_state:
1075 atomic_inc(&state->count);
1076 return state;
1077}
1078
1079static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1080{
1081 struct inode *inode;
1082 struct nfs4_state *state = NULL;
1083 struct nfs_delegation *delegation;
1084 int ret;
1085
1086 if (!data->rpc_done) {
1087 state = nfs4_try_open_cached(data);
1088 goto out;
1089 }
1090
1091 ret = -EAGAIN;
1092 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1093 goto err;
1094 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1095 ret = PTR_ERR(inode);
1096 if (IS_ERR(inode))
1097 goto err;
1098 ret = -ENOMEM;
1099 state = nfs4_get_open_state(inode, data->owner);
1100 if (state == NULL)
1101 goto err_put_inode;
1102 if (data->o_res.delegation_type != 0) {
1103 int delegation_flags = 0;
1104
1105 rcu_read_lock();
1106 delegation = rcu_dereference(NFS_I(inode)->delegation);
1107 if (delegation)
1108 delegation_flags = delegation->flags;
1109 rcu_read_unlock();
1110 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1111 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1112 "returning a delegation for "
1113 "OPEN(CLAIM_DELEGATE_CUR)\n",
1114 NFS_CLIENT(inode)->cl_server);
1115 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1116 nfs_inode_set_delegation(state->inode,
1117 data->owner->so_cred,
1118 &data->o_res);
1119 else
1120 nfs_inode_reclaim_delegation(state->inode,
1121 data->owner->so_cred,
1122 &data->o_res);
1123 }
1124
1125 update_open_stateid(state, &data->o_res.stateid, NULL,
1126 data->o_arg.fmode);
1127 iput(inode);
1128out:
1129 return state;
1130err_put_inode:
1131 iput(inode);
1132err:
1133 return ERR_PTR(ret);
1134}
1135
1136static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1137{
1138 struct nfs_inode *nfsi = NFS_I(state->inode);
1139 struct nfs_open_context *ctx;
1140
1141 spin_lock(&state->inode->i_lock);
1142 list_for_each_entry(ctx, &nfsi->open_files, list) {
1143 if (ctx->state != state)
1144 continue;
1145 get_nfs_open_context(ctx);
1146 spin_unlock(&state->inode->i_lock);
1147 return ctx;
1148 }
1149 spin_unlock(&state->inode->i_lock);
1150 return ERR_PTR(-ENOENT);
1151}
1152
1153static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1154{
1155 struct nfs4_opendata *opendata;
1156
1157 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1158 if (opendata == NULL)
1159 return ERR_PTR(-ENOMEM);
1160 opendata->state = state;
1161 atomic_inc(&state->count);
1162 return opendata;
1163}
1164
1165static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1166{
1167 struct nfs4_state *newstate;
1168 int ret;
1169
1170 opendata->o_arg.open_flags = 0;
1171 opendata->o_arg.fmode = fmode;
1172 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1173 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1174 nfs4_init_opendata_res(opendata);
1175 ret = _nfs4_recover_proc_open(opendata);
1176 if (ret != 0)
1177 return ret;
1178 newstate = nfs4_opendata_to_nfs4_state(opendata);
1179 if (IS_ERR(newstate))
1180 return PTR_ERR(newstate);
1181 nfs4_close_state(newstate, fmode);
1182 *res = newstate;
1183 return 0;
1184}
1185
1186static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1187{
1188 struct nfs4_state *newstate;
1189 int ret;
1190
1191 /* memory barrier prior to reading state->n_* */
1192 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1193 smp_rmb();
1194 if (state->n_rdwr != 0) {
1195 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1196 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1197 if (ret != 0)
1198 return ret;
1199 if (newstate != state)
1200 return -ESTALE;
1201 }
1202 if (state->n_wronly != 0) {
1203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1204 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1205 if (ret != 0)
1206 return ret;
1207 if (newstate != state)
1208 return -ESTALE;
1209 }
1210 if (state->n_rdonly != 0) {
1211 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1213 if (ret != 0)
1214 return ret;
1215 if (newstate != state)
1216 return -ESTALE;
1217 }
1218 /*
1219 * We may have performed cached opens for all three recoveries.
1220 * Check if we need to update the current stateid.
1221 */
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1223 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1224 write_seqlock(&state->seqlock);
1225 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1226 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1227 write_sequnlock(&state->seqlock);
1228 }
1229 return 0;
1230}
1231
1232/*
1233 * OPEN_RECLAIM:
1234 * reclaim state on the server after a reboot.
1235 */
1236static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1237{
1238 struct nfs_delegation *delegation;
1239 struct nfs4_opendata *opendata;
1240 fmode_t delegation_type = 0;
1241 int status;
1242
1243 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1244 if (IS_ERR(opendata))
1245 return PTR_ERR(opendata);
1246 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1247 opendata->o_arg.fh = NFS_FH(state->inode);
1248 rcu_read_lock();
1249 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1250 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1251 delegation_type = delegation->type;
1252 rcu_read_unlock();
1253 opendata->o_arg.u.delegation_type = delegation_type;
1254 status = nfs4_open_recover(opendata, state);
1255 nfs4_opendata_put(opendata);
1256 return status;
1257}
1258
1259static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1260{
1261 struct nfs_server *server = NFS_SERVER(state->inode);
1262 struct nfs4_exception exception = { };
1263 int err;
1264 do {
1265 err = _nfs4_do_open_reclaim(ctx, state);
1266 if (err != -NFS4ERR_DELAY)
1267 break;
1268 nfs4_handle_exception(server, err, &exception);
1269 } while (exception.retry);
1270 return err;
1271}
1272
1273static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1274{
1275 struct nfs_open_context *ctx;
1276 int ret;
1277
1278 ctx = nfs4_state_find_open_context(state);
1279 if (IS_ERR(ctx))
1280 return PTR_ERR(ctx);
1281 ret = nfs4_do_open_reclaim(ctx, state);
1282 put_nfs_open_context(ctx);
1283 return ret;
1284}
1285
1286static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1287{
1288 struct nfs4_opendata *opendata;
1289 int ret;
1290
1291 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1292 if (IS_ERR(opendata))
1293 return PTR_ERR(opendata);
1294 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1295 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1296 sizeof(opendata->o_arg.u.delegation.data));
1297 ret = nfs4_open_recover(opendata, state);
1298 nfs4_opendata_put(opendata);
1299 return ret;
1300}
1301
1302int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303{
1304 struct nfs4_exception exception = { };
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1306 int err;
1307 do {
1308 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1309 switch (err) {
1310 case 0:
1311 case -ENOENT:
1312 case -ESTALE:
1313 goto out;
1314 case -NFS4ERR_BADSESSION:
1315 case -NFS4ERR_BADSLOT:
1316 case -NFS4ERR_BAD_HIGH_SLOT:
1317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1318 case -NFS4ERR_DEADSESSION:
1319 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1320 goto out;
1321 case -NFS4ERR_STALE_CLIENTID:
1322 case -NFS4ERR_STALE_STATEID:
1323 case -NFS4ERR_EXPIRED:
1324 /* Don't recall a delegation if it was lost */
1325 nfs4_schedule_lease_recovery(server->nfs_client);
1326 goto out;
1327 case -ERESTARTSYS:
1328 /*
1329 * The show must go on: exit, but mark the
1330 * stateid as needing recovery.
1331 */
1332 case -NFS4ERR_ADMIN_REVOKED:
1333 case -NFS4ERR_BAD_STATEID:
1334 nfs4_schedule_stateid_recovery(server, state);
1335 case -EKEYEXPIRED:
1336 /*
1337 * User RPCSEC_GSS context has expired.
1338 * We cannot recover this stateid now, so
1339 * skip it and allow recovery thread to
1340 * proceed.
1341 */
1342 case -ENOMEM:
1343 err = 0;
1344 goto out;
1345 }
1346 err = nfs4_handle_exception(server, err, &exception);
1347 } while (exception.retry);
1348out:
1349 return err;
1350}
1351
1352static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1353{
1354 struct nfs4_opendata *data = calldata;
1355
1356 data->rpc_status = task->tk_status;
1357 if (data->rpc_status == 0) {
1358 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1359 sizeof(data->o_res.stateid.data));
1360 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1361 renew_lease(data->o_res.server, data->timestamp);
1362 data->rpc_done = 1;
1363 }
1364}
1365
1366static void nfs4_open_confirm_release(void *calldata)
1367{
1368 struct nfs4_opendata *data = calldata;
1369 struct nfs4_state *state = NULL;
1370
1371 /* If this request hasn't been cancelled, do nothing */
1372 if (data->cancelled == 0)
1373 goto out_free;
1374 /* In case of error, no cleanup! */
1375 if (!data->rpc_done)
1376 goto out_free;
1377 state = nfs4_opendata_to_nfs4_state(data);
1378 if (!IS_ERR(state))
1379 nfs4_close_state(state, data->o_arg.fmode);
1380out_free:
1381 nfs4_opendata_put(data);
1382}
1383
1384static const struct rpc_call_ops nfs4_open_confirm_ops = {
1385 .rpc_call_done = nfs4_open_confirm_done,
1386 .rpc_release = nfs4_open_confirm_release,
1387};
1388
1389/*
1390 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1391 */
1392static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1393{
1394 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1395 struct rpc_task *task;
1396 struct rpc_message msg = {
1397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1398 .rpc_argp = &data->c_arg,
1399 .rpc_resp = &data->c_res,
1400 .rpc_cred = data->owner->so_cred,
1401 };
1402 struct rpc_task_setup task_setup_data = {
1403 .rpc_client = server->client,
1404 .rpc_message = &msg,
1405 .callback_ops = &nfs4_open_confirm_ops,
1406 .callback_data = data,
1407 .workqueue = nfsiod_workqueue,
1408 .flags = RPC_TASK_ASYNC,
1409 };
1410 int status;
1411
1412 kref_get(&data->kref);
1413 data->rpc_done = 0;
1414 data->rpc_status = 0;
1415 data->timestamp = jiffies;
1416 task = rpc_run_task(&task_setup_data);
1417 if (IS_ERR(task))
1418 return PTR_ERR(task);
1419 status = nfs4_wait_for_completion_rpc_task(task);
1420 if (status != 0) {
1421 data->cancelled = 1;
1422 smp_wmb();
1423 } else
1424 status = data->rpc_status;
1425 rpc_put_task(task);
1426 return status;
1427}
1428
1429static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1430{
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state_owner *sp = data->owner;
1433
1434 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1435 return;
1436 /*
1437 * Check if we still need to send an OPEN call, or if we can use
1438 * a delegation instead.
1439 */
1440 if (data->state != NULL) {
1441 struct nfs_delegation *delegation;
1442
1443 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1444 goto out_no_action;
1445 rcu_read_lock();
1446 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1447 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1448 can_open_delegated(delegation, data->o_arg.fmode))
1449 goto unlock_no_action;
1450 rcu_read_unlock();
1451 }
1452 /* Update sequence id. */
1453 data->o_arg.id = sp->so_seqid.owner_id;
1454 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1455 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1456 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1457 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1458 }
1459 data->timestamp = jiffies;
1460 if (nfs4_setup_sequence(data->o_arg.server,
1461 &data->o_arg.seq_args,
1462 &data->o_res.seq_res, task))
1463 return;
1464 rpc_call_start(task);
1465 return;
1466unlock_no_action:
1467 rcu_read_unlock();
1468out_no_action:
1469 task->tk_action = NULL;
1470
1471}
1472
1473static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1474{
1475 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1476 nfs4_open_prepare(task, calldata);
1477}
1478
1479static void nfs4_open_done(struct rpc_task *task, void *calldata)
1480{
1481 struct nfs4_opendata *data = calldata;
1482
1483 data->rpc_status = task->tk_status;
1484
1485 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1486 return;
1487
1488 if (task->tk_status == 0) {
1489 switch (data->o_res.f_attr->mode & S_IFMT) {
1490 case S_IFREG:
1491 break;
1492 case S_IFLNK:
1493 data->rpc_status = -ELOOP;
1494 break;
1495 case S_IFDIR:
1496 data->rpc_status = -EISDIR;
1497 break;
1498 default:
1499 data->rpc_status = -ENOTDIR;
1500 }
1501 renew_lease(data->o_res.server, data->timestamp);
1502 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1503 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1504 }
1505 data->rpc_done = 1;
1506}
1507
1508static void nfs4_open_release(void *calldata)
1509{
1510 struct nfs4_opendata *data = calldata;
1511 struct nfs4_state *state = NULL;
1512
1513 /* If this request hasn't been cancelled, do nothing */
1514 if (data->cancelled == 0)
1515 goto out_free;
1516 /* In case of error, no cleanup! */
1517 if (data->rpc_status != 0 || !data->rpc_done)
1518 goto out_free;
1519 /* In case we need an open_confirm, no cleanup! */
1520 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1521 goto out_free;
1522 state = nfs4_opendata_to_nfs4_state(data);
1523 if (!IS_ERR(state))
1524 nfs4_close_state(state, data->o_arg.fmode);
1525out_free:
1526 nfs4_opendata_put(data);
1527}
1528
1529static const struct rpc_call_ops nfs4_open_ops = {
1530 .rpc_call_prepare = nfs4_open_prepare,
1531 .rpc_call_done = nfs4_open_done,
1532 .rpc_release = nfs4_open_release,
1533};
1534
1535static const struct rpc_call_ops nfs4_recover_open_ops = {
1536 .rpc_call_prepare = nfs4_recover_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1539};
1540
1541static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1542{
1543 struct inode *dir = data->dir->d_inode;
1544 struct nfs_server *server = NFS_SERVER(dir);
1545 struct nfs_openargs *o_arg = &data->o_arg;
1546 struct nfs_openres *o_res = &data->o_res;
1547 struct rpc_task *task;
1548 struct rpc_message msg = {
1549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1550 .rpc_argp = o_arg,
1551 .rpc_resp = o_res,
1552 .rpc_cred = data->owner->so_cred,
1553 };
1554 struct rpc_task_setup task_setup_data = {
1555 .rpc_client = server->client,
1556 .rpc_message = &msg,
1557 .callback_ops = &nfs4_open_ops,
1558 .callback_data = data,
1559 .workqueue = nfsiod_workqueue,
1560 .flags = RPC_TASK_ASYNC,
1561 };
1562 int status;
1563
1564 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1565 kref_get(&data->kref);
1566 data->rpc_done = 0;
1567 data->rpc_status = 0;
1568 data->cancelled = 0;
1569 if (isrecover)
1570 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1571 task = rpc_run_task(&task_setup_data);
1572 if (IS_ERR(task))
1573 return PTR_ERR(task);
1574 status = nfs4_wait_for_completion_rpc_task(task);
1575 if (status != 0) {
1576 data->cancelled = 1;
1577 smp_wmb();
1578 } else
1579 status = data->rpc_status;
1580 rpc_put_task(task);
1581
1582 return status;
1583}
1584
1585static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1586{
1587 struct inode *dir = data->dir->d_inode;
1588 struct nfs_openres *o_res = &data->o_res;
1589 int status;
1590
1591 status = nfs4_run_open_task(data, 1);
1592 if (status != 0 || !data->rpc_done)
1593 return status;
1594
1595 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1596
1597 nfs_refresh_inode(dir, o_res->dir_attr);
1598
1599 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1600 status = _nfs4_proc_open_confirm(data);
1601 if (status != 0)
1602 return status;
1603 }
1604
1605 return status;
1606}
1607
1608/*
1609 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1610 */
1611static int _nfs4_proc_open(struct nfs4_opendata *data)
1612{
1613 struct inode *dir = data->dir->d_inode;
1614 struct nfs_server *server = NFS_SERVER(dir);
1615 struct nfs_openargs *o_arg = &data->o_arg;
1616 struct nfs_openres *o_res = &data->o_res;
1617 int status;
1618
1619 status = nfs4_run_open_task(data, 0);
1620 if (!data->rpc_done)
1621 return status;
1622 if (status != 0) {
1623 if (status == -NFS4ERR_BADNAME &&
1624 !(o_arg->open_flags & O_CREAT))
1625 return -ENOENT;
1626 return status;
1627 }
1628
1629 nfs_fattr_map_and_free_names(server, &data->f_attr);
1630
1631 if (o_arg->open_flags & O_CREAT) {
1632 update_changeattr(dir, &o_res->cinfo);
1633 nfs_post_op_update_inode(dir, o_res->dir_attr);
1634 } else
1635 nfs_refresh_inode(dir, o_res->dir_attr);
1636 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1637 server->caps &= ~NFS_CAP_POSIX_LOCK;
1638 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1639 status = _nfs4_proc_open_confirm(data);
1640 if (status != 0)
1641 return status;
1642 }
1643 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1644 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1645 return 0;
1646}
1647
1648static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1649{
1650 unsigned int loop;
1651 int ret;
1652
1653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1654 ret = nfs4_wait_clnt_recover(clp);
1655 if (ret != 0)
1656 break;
1657 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1658 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1659 break;
1660 nfs4_schedule_state_manager(clp);
1661 ret = -EIO;
1662 }
1663 return ret;
1664}
1665
1666static int nfs4_recover_expired_lease(struct nfs_server *server)
1667{
1668 return nfs4_client_recover_expired_lease(server->nfs_client);
1669}
1670
1671/*
1672 * OPEN_EXPIRED:
1673 * reclaim state on the server after a network partition.
1674 * Assumes caller holds the appropriate lock
1675 */
1676static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1677{
1678 struct nfs4_opendata *opendata;
1679 int ret;
1680
1681 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1682 if (IS_ERR(opendata))
1683 return PTR_ERR(opendata);
1684 ret = nfs4_open_recover(opendata, state);
1685 if (ret == -ESTALE)
1686 d_drop(ctx->dentry);
1687 nfs4_opendata_put(opendata);
1688 return ret;
1689}
1690
1691static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1692{
1693 struct nfs_server *server = NFS_SERVER(state->inode);
1694 struct nfs4_exception exception = { };
1695 int err;
1696
1697 do {
1698 err = _nfs4_open_expired(ctx, state);
1699 switch (err) {
1700 default:
1701 goto out;
1702 case -NFS4ERR_GRACE:
1703 case -NFS4ERR_DELAY:
1704 nfs4_handle_exception(server, err, &exception);
1705 err = 0;
1706 }
1707 } while (exception.retry);
1708out:
1709 return err;
1710}
1711
1712static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1713{
1714 struct nfs_open_context *ctx;
1715 int ret;
1716
1717 ctx = nfs4_state_find_open_context(state);
1718 if (IS_ERR(ctx))
1719 return PTR_ERR(ctx);
1720 ret = nfs4_do_open_expired(ctx, state);
1721 put_nfs_open_context(ctx);
1722 return ret;
1723}
1724
1725#if defined(CONFIG_NFS_V4_1)
1726static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1727{
1728 int status = NFS_OK;
1729 struct nfs_server *server = NFS_SERVER(state->inode);
1730
1731 if (state->flags & flags) {
1732 status = nfs41_test_stateid(server, stateid);
1733 if (status != NFS_OK) {
1734 nfs41_free_stateid(server, stateid);
1735 state->flags &= ~flags;
1736 }
1737 }
1738 return status;
1739}
1740
1741static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1742{
1743 int deleg_status, open_status;
1744 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1745 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1746
1747 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1748 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1749
1750 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1751 return NFS_OK;
1752 return nfs4_open_expired(sp, state);
1753}
1754#endif
1755
1756/*
1757 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1758 * fields corresponding to attributes that were used to store the verifier.
1759 * Make sure we clobber those fields in the later setattr call
1760 */
1761static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1762{
1763 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1764 !(sattr->ia_valid & ATTR_ATIME_SET))
1765 sattr->ia_valid |= ATTR_ATIME;
1766
1767 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1768 !(sattr->ia_valid & ATTR_MTIME_SET))
1769 sattr->ia_valid |= ATTR_MTIME;
1770}
1771
1772/*
1773 * Returns a referenced nfs4_state
1774 */
1775static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1776{
1777 struct nfs4_state_owner *sp;
1778 struct nfs4_state *state = NULL;
1779 struct nfs_server *server = NFS_SERVER(dir);
1780 struct nfs4_opendata *opendata;
1781 int status;
1782
1783 /* Protect against reboot recovery conflicts */
1784 status = -ENOMEM;
1785 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1786 if (sp == NULL) {
1787 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1788 goto out_err;
1789 }
1790 status = nfs4_recover_expired_lease(server);
1791 if (status != 0)
1792 goto err_put_state_owner;
1793 if (dentry->d_inode != NULL)
1794 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1795 status = -ENOMEM;
1796 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1797 if (opendata == NULL)
1798 goto err_put_state_owner;
1799
1800 if (dentry->d_inode != NULL)
1801 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1802
1803 status = _nfs4_proc_open(opendata);
1804 if (status != 0)
1805 goto err_opendata_put;
1806
1807 state = nfs4_opendata_to_nfs4_state(opendata);
1808 status = PTR_ERR(state);
1809 if (IS_ERR(state))
1810 goto err_opendata_put;
1811 if (server->caps & NFS_CAP_POSIX_LOCK)
1812 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1813
1814 if (opendata->o_arg.open_flags & O_EXCL) {
1815 nfs4_exclusive_attrset(opendata, sattr);
1816
1817 nfs_fattr_init(opendata->o_res.f_attr);
1818 status = nfs4_do_setattr(state->inode, cred,
1819 opendata->o_res.f_attr, sattr,
1820 state);
1821 if (status == 0)
1822 nfs_setattr_update_inode(state->inode, sattr);
1823 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1824 }
1825 nfs4_opendata_put(opendata);
1826 nfs4_put_state_owner(sp);
1827 *res = state;
1828 return 0;
1829err_opendata_put:
1830 nfs4_opendata_put(opendata);
1831err_put_state_owner:
1832 nfs4_put_state_owner(sp);
1833out_err:
1834 *res = NULL;
1835 return status;
1836}
1837
1838
1839static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1840{
1841 struct nfs4_exception exception = { };
1842 struct nfs4_state *res;
1843 int status;
1844
1845 do {
1846 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1847 if (status == 0)
1848 break;
1849 /* NOTE: BAD_SEQID means the server and client disagree about the
1850 * book-keeping w.r.t. state-changing operations
1851 * (OPEN/CLOSE/LOCK/LOCKU...)
1852 * It is actually a sign of a bug on the client or on the server.
1853 *
1854 * If we receive a BAD_SEQID error in the particular case of
1855 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1856 * have unhashed the old state_owner for us, and that we can
1857 * therefore safely retry using a new one. We should still warn
1858 * the user though...
1859 */
1860 if (status == -NFS4ERR_BAD_SEQID) {
1861 printk(KERN_WARNING "NFS: v4 server %s "
1862 " returned a bad sequence-id error!\n",
1863 NFS_SERVER(dir)->nfs_client->cl_hostname);
1864 exception.retry = 1;
1865 continue;
1866 }
1867 /*
1868 * BAD_STATEID on OPEN means that the server cancelled our
1869 * state before it received the OPEN_CONFIRM.
1870 * Recover by retrying the request as per the discussion
1871 * on Page 181 of RFC3530.
1872 */
1873 if (status == -NFS4ERR_BAD_STATEID) {
1874 exception.retry = 1;
1875 continue;
1876 }
1877 if (status == -EAGAIN) {
1878 /* We must have found a delegation */
1879 exception.retry = 1;
1880 continue;
1881 }
1882 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1883 status, &exception));
1884 } while (exception.retry);
1885 return res;
1886}
1887
1888static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1889 struct nfs_fattr *fattr, struct iattr *sattr,
1890 struct nfs4_state *state)
1891{
1892 struct nfs_server *server = NFS_SERVER(inode);
1893 struct nfs_setattrargs arg = {
1894 .fh = NFS_FH(inode),
1895 .iap = sattr,
1896 .server = server,
1897 .bitmask = server->attr_bitmask,
1898 };
1899 struct nfs_setattrres res = {
1900 .fattr = fattr,
1901 .server = server,
1902 };
1903 struct rpc_message msg = {
1904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1905 .rpc_argp = &arg,
1906 .rpc_resp = &res,
1907 .rpc_cred = cred,
1908 };
1909 unsigned long timestamp = jiffies;
1910 int status;
1911
1912 nfs_fattr_init(fattr);
1913
1914 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1915 /* Use that stateid */
1916 } else if (state != NULL) {
1917 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1918 } else
1919 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1920
1921 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1922 if (status == 0 && state != NULL)
1923 renew_lease(server, timestamp);
1924 return status;
1925}
1926
1927static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1928 struct nfs_fattr *fattr, struct iattr *sattr,
1929 struct nfs4_state *state)
1930{
1931 struct nfs_server *server = NFS_SERVER(inode);
1932 struct nfs4_exception exception = { };
1933 int err;
1934 do {
1935 err = nfs4_handle_exception(server,
1936 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1937 &exception);
1938 } while (exception.retry);
1939 return err;
1940}
1941
1942struct nfs4_closedata {
1943 struct inode *inode;
1944 struct nfs4_state *state;
1945 struct nfs_closeargs arg;
1946 struct nfs_closeres res;
1947 struct nfs_fattr fattr;
1948 unsigned long timestamp;
1949 bool roc;
1950 u32 roc_barrier;
1951};
1952
1953static void nfs4_free_closedata(void *data)
1954{
1955 struct nfs4_closedata *calldata = data;
1956 struct nfs4_state_owner *sp = calldata->state->owner;
1957 struct super_block *sb = calldata->state->inode->i_sb;
1958
1959 if (calldata->roc)
1960 pnfs_roc_release(calldata->state->inode);
1961 nfs4_put_open_state(calldata->state);
1962 nfs_free_seqid(calldata->arg.seqid);
1963 nfs4_put_state_owner(sp);
1964 nfs_sb_deactive(sb);
1965 kfree(calldata);
1966}
1967
1968static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1969 fmode_t fmode)
1970{
1971 spin_lock(&state->owner->so_lock);
1972 if (!(fmode & FMODE_READ))
1973 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1974 if (!(fmode & FMODE_WRITE))
1975 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1976 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1977 spin_unlock(&state->owner->so_lock);
1978}
1979
1980static void nfs4_close_done(struct rpc_task *task, void *data)
1981{
1982 struct nfs4_closedata *calldata = data;
1983 struct nfs4_state *state = calldata->state;
1984 struct nfs_server *server = NFS_SERVER(calldata->inode);
1985
1986 dprintk("%s: begin!\n", __func__);
1987 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1988 return;
1989 /* hmm. we are done with the inode, and in the process of freeing
1990 * the state_owner. we keep this around to process errors
1991 */
1992 switch (task->tk_status) {
1993 case 0:
1994 if (calldata->roc)
1995 pnfs_roc_set_barrier(state->inode,
1996 calldata->roc_barrier);
1997 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1998 renew_lease(server, calldata->timestamp);
1999 nfs4_close_clear_stateid_flags(state,
2000 calldata->arg.fmode);
2001 break;
2002 case -NFS4ERR_STALE_STATEID:
2003 case -NFS4ERR_OLD_STATEID:
2004 case -NFS4ERR_BAD_STATEID:
2005 case -NFS4ERR_EXPIRED:
2006 if (calldata->arg.fmode == 0)
2007 break;
2008 default:
2009 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2010 rpc_restart_call_prepare(task);
2011 }
2012 nfs_release_seqid(calldata->arg.seqid);
2013 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2014 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2015}
2016
2017static void nfs4_close_prepare(struct rpc_task *task, void *data)
2018{
2019 struct nfs4_closedata *calldata = data;
2020 struct nfs4_state *state = calldata->state;
2021 int call_close = 0;
2022
2023 dprintk("%s: begin!\n", __func__);
2024 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2025 return;
2026
2027 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2028 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2029 spin_lock(&state->owner->so_lock);
2030 /* Calculate the change in open mode */
2031 if (state->n_rdwr == 0) {
2032 if (state->n_rdonly == 0) {
2033 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2034 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2035 calldata->arg.fmode &= ~FMODE_READ;
2036 }
2037 if (state->n_wronly == 0) {
2038 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2039 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2040 calldata->arg.fmode &= ~FMODE_WRITE;
2041 }
2042 }
2043 spin_unlock(&state->owner->so_lock);
2044
2045 if (!call_close) {
2046 /* Note: exit _without_ calling nfs4_close_done */
2047 task->tk_action = NULL;
2048 goto out;
2049 }
2050
2051 if (calldata->arg.fmode == 0) {
2052 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2053 if (calldata->roc &&
2054 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2055 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2056 task, NULL);
2057 goto out;
2058 }
2059 }
2060
2061 nfs_fattr_init(calldata->res.fattr);
2062 calldata->timestamp = jiffies;
2063 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2064 &calldata->arg.seq_args,
2065 &calldata->res.seq_res,
2066 task))
2067 goto out;
2068 rpc_call_start(task);
2069out:
2070 dprintk("%s: done!\n", __func__);
2071}
2072
2073static const struct rpc_call_ops nfs4_close_ops = {
2074 .rpc_call_prepare = nfs4_close_prepare,
2075 .rpc_call_done = nfs4_close_done,
2076 .rpc_release = nfs4_free_closedata,
2077};
2078
2079/*
2080 * It is possible for data to be read/written from a mem-mapped file
2081 * after the sys_close call (which hits the vfs layer as a flush).
2082 * This means that we can't safely call nfsv4 close on a file until
2083 * the inode is cleared. This in turn means that we are not good
2084 * NFSv4 citizens - we do not indicate to the server to update the file's
2085 * share state even when we are done with one of the three share
2086 * stateid's in the inode.
2087 *
2088 * NOTE: Caller must be holding the sp->so_owner semaphore!
2089 */
2090int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2091{
2092 struct nfs_server *server = NFS_SERVER(state->inode);
2093 struct nfs4_closedata *calldata;
2094 struct nfs4_state_owner *sp = state->owner;
2095 struct rpc_task *task;
2096 struct rpc_message msg = {
2097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2098 .rpc_cred = state->owner->so_cred,
2099 };
2100 struct rpc_task_setup task_setup_data = {
2101 .rpc_client = server->client,
2102 .rpc_message = &msg,
2103 .callback_ops = &nfs4_close_ops,
2104 .workqueue = nfsiod_workqueue,
2105 .flags = RPC_TASK_ASYNC,
2106 };
2107 int status = -ENOMEM;
2108
2109 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2110 if (calldata == NULL)
2111 goto out;
2112 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2113 calldata->inode = state->inode;
2114 calldata->state = state;
2115 calldata->arg.fh = NFS_FH(state->inode);
2116 calldata->arg.stateid = &state->open_stateid;
2117 /* Serialization for the sequence id */
2118 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2119 if (calldata->arg.seqid == NULL)
2120 goto out_free_calldata;
2121 calldata->arg.fmode = 0;
2122 calldata->arg.bitmask = server->cache_consistency_bitmask;
2123 calldata->res.fattr = &calldata->fattr;
2124 calldata->res.seqid = calldata->arg.seqid;
2125 calldata->res.server = server;
2126 calldata->roc = roc;
2127 nfs_sb_active(calldata->inode->i_sb);
2128
2129 msg.rpc_argp = &calldata->arg;
2130 msg.rpc_resp = &calldata->res;
2131 task_setup_data.callback_data = calldata;
2132 task = rpc_run_task(&task_setup_data);
2133 if (IS_ERR(task))
2134 return PTR_ERR(task);
2135 status = 0;
2136 if (wait)
2137 status = rpc_wait_for_completion_task(task);
2138 rpc_put_task(task);
2139 return status;
2140out_free_calldata:
2141 kfree(calldata);
2142out:
2143 if (roc)
2144 pnfs_roc_release(state->inode);
2145 nfs4_put_open_state(state);
2146 nfs4_put_state_owner(sp);
2147 return status;
2148}
2149
2150static struct inode *
2151nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2152{
2153 struct nfs4_state *state;
2154
2155 /* Protect against concurrent sillydeletes */
2156 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2157 if (IS_ERR(state))
2158 return ERR_CAST(state);
2159 ctx->state = state;
2160 return igrab(state->inode);
2161}
2162
2163static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2164{
2165 if (ctx->state == NULL)
2166 return;
2167 if (is_sync)
2168 nfs4_close_sync(ctx->state, ctx->mode);
2169 else
2170 nfs4_close_state(ctx->state, ctx->mode);
2171}
2172
2173static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2174{
2175 struct nfs4_server_caps_arg args = {
2176 .fhandle = fhandle,
2177 };
2178 struct nfs4_server_caps_res res = {};
2179 struct rpc_message msg = {
2180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2181 .rpc_argp = &args,
2182 .rpc_resp = &res,
2183 };
2184 int status;
2185
2186 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2187 if (status == 0) {
2188 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2189 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2190 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2191 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2192 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2193 NFS_CAP_CTIME|NFS_CAP_MTIME);
2194 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2195 server->caps |= NFS_CAP_ACLS;
2196 if (res.has_links != 0)
2197 server->caps |= NFS_CAP_HARDLINKS;
2198 if (res.has_symlinks != 0)
2199 server->caps |= NFS_CAP_SYMLINKS;
2200 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2201 server->caps |= NFS_CAP_FILEID;
2202 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2203 server->caps |= NFS_CAP_MODE;
2204 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2205 server->caps |= NFS_CAP_NLINK;
2206 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2207 server->caps |= NFS_CAP_OWNER;
2208 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2209 server->caps |= NFS_CAP_OWNER_GROUP;
2210 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2211 server->caps |= NFS_CAP_ATIME;
2212 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2213 server->caps |= NFS_CAP_CTIME;
2214 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2215 server->caps |= NFS_CAP_MTIME;
2216
2217 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2218 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2219 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2220 server->acl_bitmask = res.acl_bitmask;
2221 }
2222
2223 return status;
2224}
2225
2226int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2227{
2228 struct nfs4_exception exception = { };
2229 int err;
2230 do {
2231 err = nfs4_handle_exception(server,
2232 _nfs4_server_capabilities(server, fhandle),
2233 &exception);
2234 } while (exception.retry);
2235 return err;
2236}
2237
2238static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2239 struct nfs_fsinfo *info)
2240{
2241 struct nfs4_lookup_root_arg args = {
2242 .bitmask = nfs4_fattr_bitmap,
2243 };
2244 struct nfs4_lookup_res res = {
2245 .server = server,
2246 .fattr = info->fattr,
2247 .fh = fhandle,
2248 };
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2251 .rpc_argp = &args,
2252 .rpc_resp = &res,
2253 };
2254
2255 nfs_fattr_init(info->fattr);
2256 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2257}
2258
2259static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2260 struct nfs_fsinfo *info)
2261{
2262 struct nfs4_exception exception = { };
2263 int err;
2264 do {
2265 err = _nfs4_lookup_root(server, fhandle, info);
2266 switch (err) {
2267 case 0:
2268 case -NFS4ERR_WRONGSEC:
2269 break;
2270 default:
2271 err = nfs4_handle_exception(server, err, &exception);
2272 }
2273 } while (exception.retry);
2274 return err;
2275}
2276
2277static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2278 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2279{
2280 struct rpc_auth *auth;
2281 int ret;
2282
2283 auth = rpcauth_create(flavor, server->client);
2284 if (!auth) {
2285 ret = -EIO;
2286 goto out;
2287 }
2288 ret = nfs4_lookup_root(server, fhandle, info);
2289out:
2290 return ret;
2291}
2292
2293static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2294 struct nfs_fsinfo *info)
2295{
2296 int i, len, status = 0;
2297 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2298
2299 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2300 flav_array[len] = RPC_AUTH_NULL;
2301 len += 1;
2302
2303 for (i = 0; i < len; i++) {
2304 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2305 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2306 continue;
2307 break;
2308 }
2309 /*
2310 * -EACCESS could mean that the user doesn't have correct permissions
2311 * to access the mount. It could also mean that we tried to mount
2312 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2313 * existing mount programs don't handle -EACCES very well so it should
2314 * be mapped to -EPERM instead.
2315 */
2316 if (status == -EACCES)
2317 status = -EPERM;
2318 return status;
2319}
2320
2321/*
2322 * get the file handle for the "/" directory on the server
2323 */
2324static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2325 struct nfs_fsinfo *info)
2326{
2327 int minor_version = server->nfs_client->cl_minorversion;
2328 int status = nfs4_lookup_root(server, fhandle, info);
2329 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2330 /*
2331 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2332 * by nfs4_map_errors() as this function exits.
2333 */
2334 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2335 if (status == 0)
2336 status = nfs4_server_capabilities(server, fhandle);
2337 if (status == 0)
2338 status = nfs4_do_fsinfo(server, fhandle, info);
2339 return nfs4_map_errors(status);
2340}
2341
2342static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2343/*
2344 * Get locations and (maybe) other attributes of a referral.
2345 * Note that we'll actually follow the referral later when
2346 * we detect fsid mismatch in inode revalidation
2347 */
2348static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2349 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2350{
2351 int status = -ENOMEM;
2352 struct page *page = NULL;
2353 struct nfs4_fs_locations *locations = NULL;
2354
2355 page = alloc_page(GFP_KERNEL);
2356 if (page == NULL)
2357 goto out;
2358 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2359 if (locations == NULL)
2360 goto out;
2361
2362 status = nfs4_proc_fs_locations(dir, name, locations, page);
2363 if (status != 0)
2364 goto out;
2365 /* Make sure server returned a different fsid for the referral */
2366 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2367 dprintk("%s: server did not return a different fsid for"
2368 " a referral at %s\n", __func__, name->name);
2369 status = -EIO;
2370 goto out;
2371 }
2372 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2373 nfs_fixup_referral_attributes(&locations->fattr);
2374
2375 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2376 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2377 memset(fhandle, 0, sizeof(struct nfs_fh));
2378out:
2379 if (page)
2380 __free_page(page);
2381 kfree(locations);
2382 return status;
2383}
2384
2385static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2386{
2387 struct nfs4_getattr_arg args = {
2388 .fh = fhandle,
2389 .bitmask = server->attr_bitmask,
2390 };
2391 struct nfs4_getattr_res res = {
2392 .fattr = fattr,
2393 .server = server,
2394 };
2395 struct rpc_message msg = {
2396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2397 .rpc_argp = &args,
2398 .rpc_resp = &res,
2399 };
2400
2401 nfs_fattr_init(fattr);
2402 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2403}
2404
2405static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2406{
2407 struct nfs4_exception exception = { };
2408 int err;
2409 do {
2410 err = nfs4_handle_exception(server,
2411 _nfs4_proc_getattr(server, fhandle, fattr),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
2417/*
2418 * The file is not closed if it is opened due to the a request to change
2419 * the size of the file. The open call will not be needed once the
2420 * VFS layer lookup-intents are implemented.
2421 *
2422 * Close is called when the inode is destroyed.
2423 * If we haven't opened the file for O_WRONLY, we
2424 * need to in the size_change case to obtain a stateid.
2425 *
2426 * Got race?
2427 * Because OPEN is always done by name in nfsv4, it is
2428 * possible that we opened a different file by the same
2429 * name. We can recognize this race condition, but we
2430 * can't do anything about it besides returning an error.
2431 *
2432 * This will be fixed with VFS changes (lookup-intent).
2433 */
2434static int
2435nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2436 struct iattr *sattr)
2437{
2438 struct inode *inode = dentry->d_inode;
2439 struct rpc_cred *cred = NULL;
2440 struct nfs4_state *state = NULL;
2441 int status;
2442
2443 if (pnfs_ld_layoutret_on_setattr(inode))
2444 pnfs_return_layout(inode);
2445
2446 nfs_fattr_init(fattr);
2447
2448 /* Search for an existing open(O_WRITE) file */
2449 if (sattr->ia_valid & ATTR_FILE) {
2450 struct nfs_open_context *ctx;
2451
2452 ctx = nfs_file_open_context(sattr->ia_file);
2453 if (ctx) {
2454 cred = ctx->cred;
2455 state = ctx->state;
2456 }
2457 }
2458
2459 /* Deal with open(O_TRUNC) */
2460 if (sattr->ia_valid & ATTR_OPEN)
2461 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2462
2463 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2464 if (status == 0)
2465 nfs_setattr_update_inode(inode, sattr);
2466 return status;
2467}
2468
2469static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2470 const struct qstr *name, struct nfs_fh *fhandle,
2471 struct nfs_fattr *fattr)
2472{
2473 struct nfs_server *server = NFS_SERVER(dir);
2474 int status;
2475 struct nfs4_lookup_arg args = {
2476 .bitmask = server->attr_bitmask,
2477 .dir_fh = NFS_FH(dir),
2478 .name = name,
2479 };
2480 struct nfs4_lookup_res res = {
2481 .server = server,
2482 .fattr = fattr,
2483 .fh = fhandle,
2484 };
2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2487 .rpc_argp = &args,
2488 .rpc_resp = &res,
2489 };
2490
2491 nfs_fattr_init(fattr);
2492
2493 dprintk("NFS call lookup %s\n", name->name);
2494 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2495 dprintk("NFS reply lookup: %d\n", status);
2496 return status;
2497}
2498
2499void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2500{
2501 memset(fh, 0, sizeof(struct nfs_fh));
2502 fattr->fsid.major = 1;
2503 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2504 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2505 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2506 fattr->nlink = 2;
2507}
2508
2509static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2510 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2511{
2512 struct nfs4_exception exception = { };
2513 int err;
2514 do {
2515 int status;
2516
2517 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2518 switch (status) {
2519 case -NFS4ERR_BADNAME:
2520 return -ENOENT;
2521 case -NFS4ERR_MOVED:
2522 return nfs4_get_referral(dir, name, fattr, fhandle);
2523 case -NFS4ERR_WRONGSEC:
2524 nfs_fixup_secinfo_attributes(fattr, fhandle);
2525 }
2526 err = nfs4_handle_exception(NFS_SERVER(dir),
2527 status, &exception);
2528 } while (exception.retry);
2529 return err;
2530}
2531
2532static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2533{
2534 struct nfs_server *server = NFS_SERVER(inode);
2535 struct nfs4_accessargs args = {
2536 .fh = NFS_FH(inode),
2537 .bitmask = server->cache_consistency_bitmask,
2538 };
2539 struct nfs4_accessres res = {
2540 .server = server,
2541 };
2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2544 .rpc_argp = &args,
2545 .rpc_resp = &res,
2546 .rpc_cred = entry->cred,
2547 };
2548 int mode = entry->mask;
2549 int status;
2550
2551 /*
2552 * Determine which access bits we want to ask for...
2553 */
2554 if (mode & MAY_READ)
2555 args.access |= NFS4_ACCESS_READ;
2556 if (S_ISDIR(inode->i_mode)) {
2557 if (mode & MAY_WRITE)
2558 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2559 if (mode & MAY_EXEC)
2560 args.access |= NFS4_ACCESS_LOOKUP;
2561 } else {
2562 if (mode & MAY_WRITE)
2563 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2564 if (mode & MAY_EXEC)
2565 args.access |= NFS4_ACCESS_EXECUTE;
2566 }
2567
2568 res.fattr = nfs_alloc_fattr();
2569 if (res.fattr == NULL)
2570 return -ENOMEM;
2571
2572 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2573 if (!status) {
2574 entry->mask = 0;
2575 if (res.access & NFS4_ACCESS_READ)
2576 entry->mask |= MAY_READ;
2577 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2578 entry->mask |= MAY_WRITE;
2579 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2580 entry->mask |= MAY_EXEC;
2581 nfs_refresh_inode(inode, res.fattr);
2582 }
2583 nfs_free_fattr(res.fattr);
2584 return status;
2585}
2586
2587static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2588{
2589 struct nfs4_exception exception = { };
2590 int err;
2591 do {
2592 err = nfs4_handle_exception(NFS_SERVER(inode),
2593 _nfs4_proc_access(inode, entry),
2594 &exception);
2595 } while (exception.retry);
2596 return err;
2597}
2598
2599/*
2600 * TODO: For the time being, we don't try to get any attributes
2601 * along with any of the zero-copy operations READ, READDIR,
2602 * READLINK, WRITE.
2603 *
2604 * In the case of the first three, we want to put the GETATTR
2605 * after the read-type operation -- this is because it is hard
2606 * to predict the length of a GETATTR response in v4, and thus
2607 * align the READ data correctly. This means that the GETATTR
2608 * may end up partially falling into the page cache, and we should
2609 * shift it into the 'tail' of the xdr_buf before processing.
2610 * To do this efficiently, we need to know the total length
2611 * of data received, which doesn't seem to be available outside
2612 * of the RPC layer.
2613 *
2614 * In the case of WRITE, we also want to put the GETATTR after
2615 * the operation -- in this case because we want to make sure
2616 * we get the post-operation mtime and size. This means that
2617 * we can't use xdr_encode_pages() as written: we need a variant
2618 * of it which would leave room in the 'tail' iovec.
2619 *
2620 * Both of these changes to the XDR layer would in fact be quite
2621 * minor, but I decided to leave them for a subsequent patch.
2622 */
2623static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2624 unsigned int pgbase, unsigned int pglen)
2625{
2626 struct nfs4_readlink args = {
2627 .fh = NFS_FH(inode),
2628 .pgbase = pgbase,
2629 .pglen = pglen,
2630 .pages = &page,
2631 };
2632 struct nfs4_readlink_res res;
2633 struct rpc_message msg = {
2634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2635 .rpc_argp = &args,
2636 .rpc_resp = &res,
2637 };
2638
2639 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2640}
2641
2642static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2643 unsigned int pgbase, unsigned int pglen)
2644{
2645 struct nfs4_exception exception = { };
2646 int err;
2647 do {
2648 err = nfs4_handle_exception(NFS_SERVER(inode),
2649 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2650 &exception);
2651 } while (exception.retry);
2652 return err;
2653}
2654
2655/*
2656 * Got race?
2657 * We will need to arrange for the VFS layer to provide an atomic open.
2658 * Until then, this create/open method is prone to inefficiency and race
2659 * conditions due to the lookup, create, and open VFS calls from sys_open()
2660 * placed on the wire.
2661 *
2662 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2663 * The file will be opened again in the subsequent VFS open call
2664 * (nfs4_proc_file_open).
2665 *
2666 * The open for read will just hang around to be used by any process that
2667 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2668 */
2669
2670static int
2671nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2672 int flags, struct nfs_open_context *ctx)
2673{
2674 struct dentry *de = dentry;
2675 struct nfs4_state *state;
2676 struct rpc_cred *cred = NULL;
2677 fmode_t fmode = 0;
2678 int status = 0;
2679
2680 if (ctx != NULL) {
2681 cred = ctx->cred;
2682 de = ctx->dentry;
2683 fmode = ctx->mode;
2684 }
2685 sattr->ia_mode &= ~current_umask();
2686 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2687 d_drop(dentry);
2688 if (IS_ERR(state)) {
2689 status = PTR_ERR(state);
2690 goto out;
2691 }
2692 d_add(dentry, igrab(state->inode));
2693 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2694 if (ctx != NULL)
2695 ctx->state = state;
2696 else
2697 nfs4_close_sync(state, fmode);
2698out:
2699 return status;
2700}
2701
2702static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2703{
2704 struct nfs_server *server = NFS_SERVER(dir);
2705 struct nfs_removeargs args = {
2706 .fh = NFS_FH(dir),
2707 .name.len = name->len,
2708 .name.name = name->name,
2709 .bitmask = server->attr_bitmask,
2710 };
2711 struct nfs_removeres res = {
2712 .server = server,
2713 };
2714 struct rpc_message msg = {
2715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2716 .rpc_argp = &args,
2717 .rpc_resp = &res,
2718 };
2719 int status = -ENOMEM;
2720
2721 res.dir_attr = nfs_alloc_fattr();
2722 if (res.dir_attr == NULL)
2723 goto out;
2724
2725 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2726 if (status == 0) {
2727 update_changeattr(dir, &res.cinfo);
2728 nfs_post_op_update_inode(dir, res.dir_attr);
2729 }
2730 nfs_free_fattr(res.dir_attr);
2731out:
2732 return status;
2733}
2734
2735static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2736{
2737 struct nfs4_exception exception = { };
2738 int err;
2739 do {
2740 err = nfs4_handle_exception(NFS_SERVER(dir),
2741 _nfs4_proc_remove(dir, name),
2742 &exception);
2743 } while (exception.retry);
2744 return err;
2745}
2746
2747static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2748{
2749 struct nfs_server *server = NFS_SERVER(dir);
2750 struct nfs_removeargs *args = msg->rpc_argp;
2751 struct nfs_removeres *res = msg->rpc_resp;
2752
2753 args->bitmask = server->cache_consistency_bitmask;
2754 res->server = server;
2755 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2756 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2757}
2758
2759static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2760{
2761 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2762
2763 if (!nfs4_sequence_done(task, &res->seq_res))
2764 return 0;
2765 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2766 return 0;
2767 update_changeattr(dir, &res->cinfo);
2768 nfs_post_op_update_inode(dir, res->dir_attr);
2769 return 1;
2770}
2771
2772static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2773{
2774 struct nfs_server *server = NFS_SERVER(dir);
2775 struct nfs_renameargs *arg = msg->rpc_argp;
2776 struct nfs_renameres *res = msg->rpc_resp;
2777
2778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2779 arg->bitmask = server->attr_bitmask;
2780 res->server = server;
2781 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2782}
2783
2784static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2785 struct inode *new_dir)
2786{
2787 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2788
2789 if (!nfs4_sequence_done(task, &res->seq_res))
2790 return 0;
2791 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2792 return 0;
2793
2794 update_changeattr(old_dir, &res->old_cinfo);
2795 nfs_post_op_update_inode(old_dir, res->old_fattr);
2796 update_changeattr(new_dir, &res->new_cinfo);
2797 nfs_post_op_update_inode(new_dir, res->new_fattr);
2798 return 1;
2799}
2800
2801static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2802 struct inode *new_dir, struct qstr *new_name)
2803{
2804 struct nfs_server *server = NFS_SERVER(old_dir);
2805 struct nfs_renameargs arg = {
2806 .old_dir = NFS_FH(old_dir),
2807 .new_dir = NFS_FH(new_dir),
2808 .old_name = old_name,
2809 .new_name = new_name,
2810 .bitmask = server->attr_bitmask,
2811 };
2812 struct nfs_renameres res = {
2813 .server = server,
2814 };
2815 struct rpc_message msg = {
2816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2817 .rpc_argp = &arg,
2818 .rpc_resp = &res,
2819 };
2820 int status = -ENOMEM;
2821
2822 res.old_fattr = nfs_alloc_fattr();
2823 res.new_fattr = nfs_alloc_fattr();
2824 if (res.old_fattr == NULL || res.new_fattr == NULL)
2825 goto out;
2826
2827 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2828 if (!status) {
2829 update_changeattr(old_dir, &res.old_cinfo);
2830 nfs_post_op_update_inode(old_dir, res.old_fattr);
2831 update_changeattr(new_dir, &res.new_cinfo);
2832 nfs_post_op_update_inode(new_dir, res.new_fattr);
2833 }
2834out:
2835 nfs_free_fattr(res.new_fattr);
2836 nfs_free_fattr(res.old_fattr);
2837 return status;
2838}
2839
2840static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2841 struct inode *new_dir, struct qstr *new_name)
2842{
2843 struct nfs4_exception exception = { };
2844 int err;
2845 do {
2846 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2847 _nfs4_proc_rename(old_dir, old_name,
2848 new_dir, new_name),
2849 &exception);
2850 } while (exception.retry);
2851 return err;
2852}
2853
2854static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2855{
2856 struct nfs_server *server = NFS_SERVER(inode);
2857 struct nfs4_link_arg arg = {
2858 .fh = NFS_FH(inode),
2859 .dir_fh = NFS_FH(dir),
2860 .name = name,
2861 .bitmask = server->attr_bitmask,
2862 };
2863 struct nfs4_link_res res = {
2864 .server = server,
2865 };
2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2868 .rpc_argp = &arg,
2869 .rpc_resp = &res,
2870 };
2871 int status = -ENOMEM;
2872
2873 res.fattr = nfs_alloc_fattr();
2874 res.dir_attr = nfs_alloc_fattr();
2875 if (res.fattr == NULL || res.dir_attr == NULL)
2876 goto out;
2877
2878 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2879 if (!status) {
2880 update_changeattr(dir, &res.cinfo);
2881 nfs_post_op_update_inode(dir, res.dir_attr);
2882 nfs_post_op_update_inode(inode, res.fattr);
2883 }
2884out:
2885 nfs_free_fattr(res.dir_attr);
2886 nfs_free_fattr(res.fattr);
2887 return status;
2888}
2889
2890static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2891{
2892 struct nfs4_exception exception = { };
2893 int err;
2894 do {
2895 err = nfs4_handle_exception(NFS_SERVER(inode),
2896 _nfs4_proc_link(inode, dir, name),
2897 &exception);
2898 } while (exception.retry);
2899 return err;
2900}
2901
2902struct nfs4_createdata {
2903 struct rpc_message msg;
2904 struct nfs4_create_arg arg;
2905 struct nfs4_create_res res;
2906 struct nfs_fh fh;
2907 struct nfs_fattr fattr;
2908 struct nfs_fattr dir_fattr;
2909};
2910
2911static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2912 struct qstr *name, struct iattr *sattr, u32 ftype)
2913{
2914 struct nfs4_createdata *data;
2915
2916 data = kzalloc(sizeof(*data), GFP_KERNEL);
2917 if (data != NULL) {
2918 struct nfs_server *server = NFS_SERVER(dir);
2919
2920 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2921 data->msg.rpc_argp = &data->arg;
2922 data->msg.rpc_resp = &data->res;
2923 data->arg.dir_fh = NFS_FH(dir);
2924 data->arg.server = server;
2925 data->arg.name = name;
2926 data->arg.attrs = sattr;
2927 data->arg.ftype = ftype;
2928 data->arg.bitmask = server->attr_bitmask;
2929 data->res.server = server;
2930 data->res.fh = &data->fh;
2931 data->res.fattr = &data->fattr;
2932 data->res.dir_fattr = &data->dir_fattr;
2933 nfs_fattr_init(data->res.fattr);
2934 nfs_fattr_init(data->res.dir_fattr);
2935 }
2936 return data;
2937}
2938
2939static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2940{
2941 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2942 &data->arg.seq_args, &data->res.seq_res, 1);
2943 if (status == 0) {
2944 update_changeattr(dir, &data->res.dir_cinfo);
2945 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2946 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2947 }
2948 return status;
2949}
2950
2951static void nfs4_free_createdata(struct nfs4_createdata *data)
2952{
2953 kfree(data);
2954}
2955
2956static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2957 struct page *page, unsigned int len, struct iattr *sattr)
2958{
2959 struct nfs4_createdata *data;
2960 int status = -ENAMETOOLONG;
2961
2962 if (len > NFS4_MAXPATHLEN)
2963 goto out;
2964
2965 status = -ENOMEM;
2966 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2967 if (data == NULL)
2968 goto out;
2969
2970 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2971 data->arg.u.symlink.pages = &page;
2972 data->arg.u.symlink.len = len;
2973
2974 status = nfs4_do_create(dir, dentry, data);
2975
2976 nfs4_free_createdata(data);
2977out:
2978 return status;
2979}
2980
2981static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2982 struct page *page, unsigned int len, struct iattr *sattr)
2983{
2984 struct nfs4_exception exception = { };
2985 int err;
2986 do {
2987 err = nfs4_handle_exception(NFS_SERVER(dir),
2988 _nfs4_proc_symlink(dir, dentry, page,
2989 len, sattr),
2990 &exception);
2991 } while (exception.retry);
2992 return err;
2993}
2994
2995static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2996 struct iattr *sattr)
2997{
2998 struct nfs4_createdata *data;
2999 int status = -ENOMEM;
3000
3001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3002 if (data == NULL)
3003 goto out;
3004
3005 status = nfs4_do_create(dir, dentry, data);
3006
3007 nfs4_free_createdata(data);
3008out:
3009 return status;
3010}
3011
3012static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3013 struct iattr *sattr)
3014{
3015 struct nfs4_exception exception = { };
3016 int err;
3017
3018 sattr->ia_mode &= ~current_umask();
3019 do {
3020 err = nfs4_handle_exception(NFS_SERVER(dir),
3021 _nfs4_proc_mkdir(dir, dentry, sattr),
3022 &exception);
3023 } while (exception.retry);
3024 return err;
3025}
3026
3027static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3028 u64 cookie, struct page **pages, unsigned int count, int plus)
3029{
3030 struct inode *dir = dentry->d_inode;
3031 struct nfs4_readdir_arg args = {
3032 .fh = NFS_FH(dir),
3033 .pages = pages,
3034 .pgbase = 0,
3035 .count = count,
3036 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3037 .plus = plus,
3038 };
3039 struct nfs4_readdir_res res;
3040 struct rpc_message msg = {
3041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3042 .rpc_argp = &args,
3043 .rpc_resp = &res,
3044 .rpc_cred = cred,
3045 };
3046 int status;
3047
3048 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3049 dentry->d_parent->d_name.name,
3050 dentry->d_name.name,
3051 (unsigned long long)cookie);
3052 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3053 res.pgbase = args.pgbase;
3054 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3055 if (status >= 0) {
3056 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3057 status += args.pgbase;
3058 }
3059
3060 nfs_invalidate_atime(dir);
3061
3062 dprintk("%s: returns %d\n", __func__, status);
3063 return status;
3064}
3065
3066static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3067 u64 cookie, struct page **pages, unsigned int count, int plus)
3068{
3069 struct nfs4_exception exception = { };
3070 int err;
3071 do {
3072 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3073 _nfs4_proc_readdir(dentry, cred, cookie,
3074 pages, count, plus),
3075 &exception);
3076 } while (exception.retry);
3077 return err;
3078}
3079
3080static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3081 struct iattr *sattr, dev_t rdev)
3082{
3083 struct nfs4_createdata *data;
3084 int mode = sattr->ia_mode;
3085 int status = -ENOMEM;
3086
3087 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3088 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3089
3090 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3091 if (data == NULL)
3092 goto out;
3093
3094 if (S_ISFIFO(mode))
3095 data->arg.ftype = NF4FIFO;
3096 else if (S_ISBLK(mode)) {
3097 data->arg.ftype = NF4BLK;
3098 data->arg.u.device.specdata1 = MAJOR(rdev);
3099 data->arg.u.device.specdata2 = MINOR(rdev);
3100 }
3101 else if (S_ISCHR(mode)) {
3102 data->arg.ftype = NF4CHR;
3103 data->arg.u.device.specdata1 = MAJOR(rdev);
3104 data->arg.u.device.specdata2 = MINOR(rdev);
3105 }
3106
3107 status = nfs4_do_create(dir, dentry, data);
3108
3109 nfs4_free_createdata(data);
3110out:
3111 return status;
3112}
3113
3114static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3115 struct iattr *sattr, dev_t rdev)
3116{
3117 struct nfs4_exception exception = { };
3118 int err;
3119
3120 sattr->ia_mode &= ~current_umask();
3121 do {
3122 err = nfs4_handle_exception(NFS_SERVER(dir),
3123 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3124 &exception);
3125 } while (exception.retry);
3126 return err;
3127}
3128
3129static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3130 struct nfs_fsstat *fsstat)
3131{
3132 struct nfs4_statfs_arg args = {
3133 .fh = fhandle,
3134 .bitmask = server->attr_bitmask,
3135 };
3136 struct nfs4_statfs_res res = {
3137 .fsstat = fsstat,
3138 };
3139 struct rpc_message msg = {
3140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3141 .rpc_argp = &args,
3142 .rpc_resp = &res,
3143 };
3144
3145 nfs_fattr_init(fsstat->fattr);
3146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3147}
3148
3149static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3150{
3151 struct nfs4_exception exception = { };
3152 int err;
3153 do {
3154 err = nfs4_handle_exception(server,
3155 _nfs4_proc_statfs(server, fhandle, fsstat),
3156 &exception);
3157 } while (exception.retry);
3158 return err;
3159}
3160
3161static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3162 struct nfs_fsinfo *fsinfo)
3163{
3164 struct nfs4_fsinfo_arg args = {
3165 .fh = fhandle,
3166 .bitmask = server->attr_bitmask,
3167 };
3168 struct nfs4_fsinfo_res res = {
3169 .fsinfo = fsinfo,
3170 };
3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3173 .rpc_argp = &args,
3174 .rpc_resp = &res,
3175 };
3176
3177 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3178}
3179
3180static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3181{
3182 struct nfs4_exception exception = { };
3183 int err;
3184
3185 do {
3186 err = nfs4_handle_exception(server,
3187 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3188 &exception);
3189 } while (exception.retry);
3190 return err;
3191}
3192
3193static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3194{
3195 nfs_fattr_init(fsinfo->fattr);
3196 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3197}
3198
3199static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_pathconf *pathconf)
3201{
3202 struct nfs4_pathconf_arg args = {
3203 .fh = fhandle,
3204 .bitmask = server->attr_bitmask,
3205 };
3206 struct nfs4_pathconf_res res = {
3207 .pathconf = pathconf,
3208 };
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3211 .rpc_argp = &args,
3212 .rpc_resp = &res,
3213 };
3214
3215 /* None of the pathconf attributes are mandatory to implement */
3216 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3217 memset(pathconf, 0, sizeof(*pathconf));
3218 return 0;
3219 }
3220
3221 nfs_fattr_init(pathconf->fattr);
3222 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3223}
3224
3225static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3226 struct nfs_pathconf *pathconf)
3227{
3228 struct nfs4_exception exception = { };
3229 int err;
3230
3231 do {
3232 err = nfs4_handle_exception(server,
3233 _nfs4_proc_pathconf(server, fhandle, pathconf),
3234 &exception);
3235 } while (exception.retry);
3236 return err;
3237}
3238
3239void __nfs4_read_done_cb(struct nfs_read_data *data)
3240{
3241 nfs_invalidate_atime(data->inode);
3242}
3243
3244static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3245{
3246 struct nfs_server *server = NFS_SERVER(data->inode);
3247
3248 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3249 rpc_restart_call_prepare(task);
3250 return -EAGAIN;
3251 }
3252
3253 __nfs4_read_done_cb(data);
3254 if (task->tk_status > 0)
3255 renew_lease(server, data->timestamp);
3256 return 0;
3257}
3258
3259static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3260{
3261
3262 dprintk("--> %s\n", __func__);
3263
3264 if (!nfs4_sequence_done(task, &data->res.seq_res))
3265 return -EAGAIN;
3266
3267 return data->read_done_cb ? data->read_done_cb(task, data) :
3268 nfs4_read_done_cb(task, data);
3269}
3270
3271static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3272{
3273 data->timestamp = jiffies;
3274 data->read_done_cb = nfs4_read_done_cb;
3275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3276 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3277}
3278
3279/* Reset the the nfs_read_data to send the read to the MDS. */
3280void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3281{
3282 dprintk("%s Reset task for i/o through\n", __func__);
3283 put_lseg(data->lseg);
3284 data->lseg = NULL;
3285 /* offsets will differ in the dense stripe case */
3286 data->args.offset = data->mds_offset;
3287 data->ds_clp = NULL;
3288 data->args.fh = NFS_FH(data->inode);
3289 data->read_done_cb = nfs4_read_done_cb;
3290 task->tk_ops = data->mds_ops;
3291 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3292}
3293EXPORT_SYMBOL_GPL(nfs4_reset_read);
3294
3295static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3296{
3297 struct inode *inode = data->inode;
3298
3299 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3300 rpc_restart_call_prepare(task);
3301 return -EAGAIN;
3302 }
3303 if (task->tk_status >= 0) {
3304 renew_lease(NFS_SERVER(inode), data->timestamp);
3305 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3306 }
3307 return 0;
3308}
3309
3310static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3311{
3312 if (!nfs4_sequence_done(task, &data->res.seq_res))
3313 return -EAGAIN;
3314 return data->write_done_cb ? data->write_done_cb(task, data) :
3315 nfs4_write_done_cb(task, data);
3316}
3317
3318/* Reset the the nfs_write_data to send the write to the MDS. */
3319void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3320{
3321 dprintk("%s Reset task for i/o through\n", __func__);
3322 put_lseg(data->lseg);
3323 data->lseg = NULL;
3324 data->ds_clp = NULL;
3325 data->write_done_cb = nfs4_write_done_cb;
3326 data->args.fh = NFS_FH(data->inode);
3327 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3328 data->args.offset = data->mds_offset;
3329 data->res.fattr = &data->fattr;
3330 task->tk_ops = data->mds_ops;
3331 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3332}
3333EXPORT_SYMBOL_GPL(nfs4_reset_write);
3334
3335static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3336{
3337 struct nfs_server *server = NFS_SERVER(data->inode);
3338
3339 if (data->lseg) {
3340 data->args.bitmask = NULL;
3341 data->res.fattr = NULL;
3342 } else
3343 data->args.bitmask = server->cache_consistency_bitmask;
3344 if (!data->write_done_cb)
3345 data->write_done_cb = nfs4_write_done_cb;
3346 data->res.server = server;
3347 data->timestamp = jiffies;
3348
3349 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3350 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3351}
3352
3353static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3354{
3355 struct inode *inode = data->inode;
3356
3357 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3358 rpc_restart_call_prepare(task);
3359 return -EAGAIN;
3360 }
3361 nfs_refresh_inode(inode, data->res.fattr);
3362 return 0;
3363}
3364
3365static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3366{
3367 if (!nfs4_sequence_done(task, &data->res.seq_res))
3368 return -EAGAIN;
3369 return data->write_done_cb(task, data);
3370}
3371
3372static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3373{
3374 struct nfs_server *server = NFS_SERVER(data->inode);
3375
3376 if (data->lseg) {
3377 data->args.bitmask = NULL;
3378 data->res.fattr = NULL;
3379 } else
3380 data->args.bitmask = server->cache_consistency_bitmask;
3381 if (!data->write_done_cb)
3382 data->write_done_cb = nfs4_commit_done_cb;
3383 data->res.server = server;
3384 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3385 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3386}
3387
3388struct nfs4_renewdata {
3389 struct nfs_client *client;
3390 unsigned long timestamp;
3391};
3392
3393/*
3394 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3395 * standalone procedure for queueing an asynchronous RENEW.
3396 */
3397static void nfs4_renew_release(void *calldata)
3398{
3399 struct nfs4_renewdata *data = calldata;
3400 struct nfs_client *clp = data->client;
3401
3402 if (atomic_read(&clp->cl_count) > 1)
3403 nfs4_schedule_state_renewal(clp);
3404 nfs_put_client(clp);
3405 kfree(data);
3406}
3407
3408static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3409{
3410 struct nfs4_renewdata *data = calldata;
3411 struct nfs_client *clp = data->client;
3412 unsigned long timestamp = data->timestamp;
3413
3414 if (task->tk_status < 0) {
3415 /* Unless we're shutting down, schedule state recovery! */
3416 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3417 return;
3418 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3419 nfs4_schedule_lease_recovery(clp);
3420 return;
3421 }
3422 nfs4_schedule_path_down_recovery(clp);
3423 }
3424 do_renew_lease(clp, timestamp);
3425}
3426
3427static const struct rpc_call_ops nfs4_renew_ops = {
3428 .rpc_call_done = nfs4_renew_done,
3429 .rpc_release = nfs4_renew_release,
3430};
3431
3432static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3433{
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3436 .rpc_argp = clp,
3437 .rpc_cred = cred,
3438 };
3439 struct nfs4_renewdata *data;
3440
3441 if (renew_flags == 0)
3442 return 0;
3443 if (!atomic_inc_not_zero(&clp->cl_count))
3444 return -EIO;
3445 data = kmalloc(sizeof(*data), GFP_NOFS);
3446 if (data == NULL)
3447 return -ENOMEM;
3448 data->client = clp;
3449 data->timestamp = jiffies;
3450 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3451 &nfs4_renew_ops, data);
3452}
3453
3454static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3455{
3456 struct rpc_message msg = {
3457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3458 .rpc_argp = clp,
3459 .rpc_cred = cred,
3460 };
3461 unsigned long now = jiffies;
3462 int status;
3463
3464 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3465 if (status < 0)
3466 return status;
3467 do_renew_lease(clp, now);
3468 return 0;
3469}
3470
3471static inline int nfs4_server_supports_acls(struct nfs_server *server)
3472{
3473 return (server->caps & NFS_CAP_ACLS)
3474 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3475 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3476}
3477
3478/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3479 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3480 * the stack.
3481 */
3482#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3483
3484static int buf_to_pages_noslab(const void *buf, size_t buflen,
3485 struct page **pages, unsigned int *pgbase)
3486{
3487 struct page *newpage, **spages;
3488 int rc = 0;
3489 size_t len;
3490 spages = pages;
3491
3492 do {
3493 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3494 newpage = alloc_page(GFP_KERNEL);
3495
3496 if (newpage == NULL)
3497 goto unwind;
3498 memcpy(page_address(newpage), buf, len);
3499 buf += len;
3500 buflen -= len;
3501 *pages++ = newpage;
3502 rc++;
3503 } while (buflen != 0);
3504
3505 return rc;
3506
3507unwind:
3508 for(; rc > 0; rc--)
3509 __free_page(spages[rc-1]);
3510 return -ENOMEM;
3511}
3512
3513struct nfs4_cached_acl {
3514 int cached;
3515 size_t len;
3516 char data[0];
3517};
3518
3519static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3520{
3521 struct nfs_inode *nfsi = NFS_I(inode);
3522
3523 spin_lock(&inode->i_lock);
3524 kfree(nfsi->nfs4_acl);
3525 nfsi->nfs4_acl = acl;
3526 spin_unlock(&inode->i_lock);
3527}
3528
3529static void nfs4_zap_acl_attr(struct inode *inode)
3530{
3531 nfs4_set_cached_acl(inode, NULL);
3532}
3533
3534static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3535{
3536 struct nfs_inode *nfsi = NFS_I(inode);
3537 struct nfs4_cached_acl *acl;
3538 int ret = -ENOENT;
3539
3540 spin_lock(&inode->i_lock);
3541 acl = nfsi->nfs4_acl;
3542 if (acl == NULL)
3543 goto out;
3544 if (buf == NULL) /* user is just asking for length */
3545 goto out_len;
3546 if (acl->cached == 0)
3547 goto out;
3548 ret = -ERANGE; /* see getxattr(2) man page */
3549 if (acl->len > buflen)
3550 goto out;
3551 memcpy(buf, acl->data, acl->len);
3552out_len:
3553 ret = acl->len;
3554out:
3555 spin_unlock(&inode->i_lock);
3556 return ret;
3557}
3558
3559static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3560{
3561 struct nfs4_cached_acl *acl;
3562
3563 if (buf && acl_len <= PAGE_SIZE) {
3564 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3565 if (acl == NULL)
3566 goto out;
3567 acl->cached = 1;
3568 memcpy(acl->data, buf, acl_len);
3569 } else {
3570 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3571 if (acl == NULL)
3572 goto out;
3573 acl->cached = 0;
3574 }
3575 acl->len = acl_len;
3576out:
3577 nfs4_set_cached_acl(inode, acl);
3578}
3579
3580/*
3581 * The getxattr API returns the required buffer length when called with a
3582 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3583 * the required buf. On a NULL buf, we send a page of data to the server
3584 * guessing that the ACL request can be serviced by a page. If so, we cache
3585 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3586 * the cache. If not so, we throw away the page, and cache the required
3587 * length. The next getxattr call will then produce another round trip to
3588 * the server, this time with the input buf of the required size.
3589 */
3590static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3591{
3592 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3593 struct nfs_getaclargs args = {
3594 .fh = NFS_FH(inode),
3595 .acl_pages = pages,
3596 .acl_len = buflen,
3597 };
3598 struct nfs_getaclres res = {
3599 .acl_len = buflen,
3600 };
3601 void *resp_buf;
3602 struct rpc_message msg = {
3603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3604 .rpc_argp = &args,
3605 .rpc_resp = &res,
3606 };
3607 int ret = -ENOMEM, npages, i, acl_len = 0;
3608
3609 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3610 /* As long as we're doing a round trip to the server anyway,
3611 * let's be prepared for a page of acl data. */
3612 if (npages == 0)
3613 npages = 1;
3614
3615 for (i = 0; i < npages; i++) {
3616 pages[i] = alloc_page(GFP_KERNEL);
3617 if (!pages[i])
3618 goto out_free;
3619 }
3620 if (npages > 1) {
3621 /* for decoding across pages */
3622 args.acl_scratch = alloc_page(GFP_KERNEL);
3623 if (!args.acl_scratch)
3624 goto out_free;
3625 }
3626 args.acl_len = npages * PAGE_SIZE;
3627 args.acl_pgbase = 0;
3628 /* Let decode_getfacl know not to fail if the ACL data is larger than
3629 * the page we send as a guess */
3630 if (buf == NULL)
3631 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3632 resp_buf = page_address(pages[0]);
3633
3634 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3635 __func__, buf, buflen, npages, args.acl_len);
3636 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3637 &msg, &args.seq_args, &res.seq_res, 0);
3638 if (ret)
3639 goto out_free;
3640
3641 acl_len = res.acl_len - res.acl_data_offset;
3642 if (acl_len > args.acl_len)
3643 nfs4_write_cached_acl(inode, NULL, acl_len);
3644 else
3645 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3646 acl_len);
3647 if (buf) {
3648 ret = -ERANGE;
3649 if (acl_len > buflen)
3650 goto out_free;
3651 _copy_from_pages(buf, pages, res.acl_data_offset,
3652 res.acl_len);
3653 }
3654 ret = acl_len;
3655out_free:
3656 for (i = 0; i < npages; i++)
3657 if (pages[i])
3658 __free_page(pages[i]);
3659 if (args.acl_scratch)
3660 __free_page(args.acl_scratch);
3661 return ret;
3662}
3663
3664static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3665{
3666 struct nfs4_exception exception = { };
3667 ssize_t ret;
3668 do {
3669 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3670 if (ret >= 0)
3671 break;
3672 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3673 } while (exception.retry);
3674 return ret;
3675}
3676
3677static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3678{
3679 struct nfs_server *server = NFS_SERVER(inode);
3680 int ret;
3681
3682 if (!nfs4_server_supports_acls(server))
3683 return -EOPNOTSUPP;
3684 ret = nfs_revalidate_inode(server, inode);
3685 if (ret < 0)
3686 return ret;
3687 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3688 nfs_zap_acl_cache(inode);
3689 ret = nfs4_read_cached_acl(inode, buf, buflen);
3690 if (ret != -ENOENT)
3691 /* -ENOENT is returned if there is no ACL or if there is an ACL
3692 * but no cached acl data, just the acl length */
3693 return ret;
3694 return nfs4_get_acl_uncached(inode, buf, buflen);
3695}
3696
3697static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3698{
3699 struct nfs_server *server = NFS_SERVER(inode);
3700 struct page *pages[NFS4ACL_MAXPAGES];
3701 struct nfs_setaclargs arg = {
3702 .fh = NFS_FH(inode),
3703 .acl_pages = pages,
3704 .acl_len = buflen,
3705 };
3706 struct nfs_setaclres res;
3707 struct rpc_message msg = {
3708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3709 .rpc_argp = &arg,
3710 .rpc_resp = &res,
3711 };
3712 int ret, i;
3713
3714 if (!nfs4_server_supports_acls(server))
3715 return -EOPNOTSUPP;
3716 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3717 if (i < 0)
3718 return i;
3719 nfs_inode_return_delegation(inode);
3720 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3721
3722 /*
3723 * Free each page after tx, so the only ref left is
3724 * held by the network stack
3725 */
3726 for (; i > 0; i--)
3727 put_page(pages[i-1]);
3728
3729 /*
3730 * Acl update can result in inode attribute update.
3731 * so mark the attribute cache invalid.
3732 */
3733 spin_lock(&inode->i_lock);
3734 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3735 spin_unlock(&inode->i_lock);
3736 nfs_access_zap_cache(inode);
3737 nfs_zap_acl_cache(inode);
3738 return ret;
3739}
3740
3741static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3742{
3743 struct nfs4_exception exception = { };
3744 int err;
3745 do {
3746 err = nfs4_handle_exception(NFS_SERVER(inode),
3747 __nfs4_proc_set_acl(inode, buf, buflen),
3748 &exception);
3749 } while (exception.retry);
3750 return err;
3751}
3752
3753static int
3754nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3755{
3756 struct nfs_client *clp = server->nfs_client;
3757
3758 if (task->tk_status >= 0)
3759 return 0;
3760 switch(task->tk_status) {
3761 case -NFS4ERR_ADMIN_REVOKED:
3762 case -NFS4ERR_BAD_STATEID:
3763 case -NFS4ERR_OPENMODE:
3764 if (state == NULL)
3765 break;
3766 nfs4_schedule_stateid_recovery(server, state);
3767 goto wait_on_recovery;
3768 case -NFS4ERR_EXPIRED:
3769 if (state != NULL)
3770 nfs4_schedule_stateid_recovery(server, state);
3771 case -NFS4ERR_STALE_STATEID:
3772 case -NFS4ERR_STALE_CLIENTID:
3773 nfs4_schedule_lease_recovery(clp);
3774 goto wait_on_recovery;
3775#if defined(CONFIG_NFS_V4_1)
3776 case -NFS4ERR_BADSESSION:
3777 case -NFS4ERR_BADSLOT:
3778 case -NFS4ERR_BAD_HIGH_SLOT:
3779 case -NFS4ERR_DEADSESSION:
3780 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3781 case -NFS4ERR_SEQ_FALSE_RETRY:
3782 case -NFS4ERR_SEQ_MISORDERED:
3783 dprintk("%s ERROR %d, Reset session\n", __func__,
3784 task->tk_status);
3785 nfs4_schedule_session_recovery(clp->cl_session);
3786 task->tk_status = 0;
3787 return -EAGAIN;
3788#endif /* CONFIG_NFS_V4_1 */
3789 case -NFS4ERR_DELAY:
3790 nfs_inc_server_stats(server, NFSIOS_DELAY);
3791 case -NFS4ERR_GRACE:
3792 case -EKEYEXPIRED:
3793 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3794 task->tk_status = 0;
3795 return -EAGAIN;
3796 case -NFS4ERR_RETRY_UNCACHED_REP:
3797 case -NFS4ERR_OLD_STATEID:
3798 task->tk_status = 0;
3799 return -EAGAIN;
3800 }
3801 task->tk_status = nfs4_map_errors(task->tk_status);
3802 return 0;
3803wait_on_recovery:
3804 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3805 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3806 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3807 task->tk_status = 0;
3808 return -EAGAIN;
3809}
3810
3811int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3812 unsigned short port, struct rpc_cred *cred,
3813 struct nfs4_setclientid_res *res)
3814{
3815 nfs4_verifier sc_verifier;
3816 struct nfs4_setclientid setclientid = {
3817 .sc_verifier = &sc_verifier,
3818 .sc_prog = program,
3819 .sc_cb_ident = clp->cl_cb_ident,
3820 };
3821 struct rpc_message msg = {
3822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3823 .rpc_argp = &setclientid,
3824 .rpc_resp = res,
3825 .rpc_cred = cred,
3826 };
3827 __be32 *p;
3828 int loop = 0;
3829 int status;
3830
3831 p = (__be32*)sc_verifier.data;
3832 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3833 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3834
3835 for(;;) {
3836 rcu_read_lock();
3837 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3838 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3839 clp->cl_ipaddr,
3840 rpc_peeraddr2str(clp->cl_rpcclient,
3841 RPC_DISPLAY_ADDR),
3842 rpc_peeraddr2str(clp->cl_rpcclient,
3843 RPC_DISPLAY_PROTO),
3844 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3845 clp->cl_id_uniquifier);
3846 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3847 sizeof(setclientid.sc_netid),
3848 rpc_peeraddr2str(clp->cl_rpcclient,
3849 RPC_DISPLAY_NETID));
3850 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3851 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3852 clp->cl_ipaddr, port >> 8, port & 255);
3853 rcu_read_unlock();
3854
3855 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3856 if (status != -NFS4ERR_CLID_INUSE)
3857 break;
3858 if (loop != 0) {
3859 ++clp->cl_id_uniquifier;
3860 break;
3861 }
3862 ++loop;
3863 ssleep(clp->cl_lease_time / HZ + 1);
3864 }
3865 return status;
3866}
3867
3868int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3869 struct nfs4_setclientid_res *arg,
3870 struct rpc_cred *cred)
3871{
3872 struct nfs_fsinfo fsinfo;
3873 struct rpc_message msg = {
3874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3875 .rpc_argp = arg,
3876 .rpc_resp = &fsinfo,
3877 .rpc_cred = cred,
3878 };
3879 unsigned long now;
3880 int status;
3881
3882 now = jiffies;
3883 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3884 if (status == 0) {
3885 spin_lock(&clp->cl_lock);
3886 clp->cl_lease_time = fsinfo.lease_time * HZ;
3887 clp->cl_last_renewal = now;
3888 spin_unlock(&clp->cl_lock);
3889 }
3890 return status;
3891}
3892
3893struct nfs4_delegreturndata {
3894 struct nfs4_delegreturnargs args;
3895 struct nfs4_delegreturnres res;
3896 struct nfs_fh fh;
3897 nfs4_stateid stateid;
3898 unsigned long timestamp;
3899 struct nfs_fattr fattr;
3900 int rpc_status;
3901};
3902
3903static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3904{
3905 struct nfs4_delegreturndata *data = calldata;
3906
3907 if (!nfs4_sequence_done(task, &data->res.seq_res))
3908 return;
3909
3910 switch (task->tk_status) {
3911 case -NFS4ERR_STALE_STATEID:
3912 case -NFS4ERR_EXPIRED:
3913 case 0:
3914 renew_lease(data->res.server, data->timestamp);
3915 break;
3916 default:
3917 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3918 -EAGAIN) {
3919 rpc_restart_call_prepare(task);
3920 return;
3921 }
3922 }
3923 data->rpc_status = task->tk_status;
3924}
3925
3926static void nfs4_delegreturn_release(void *calldata)
3927{
3928 kfree(calldata);
3929}
3930
3931#if defined(CONFIG_NFS_V4_1)
3932static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3933{
3934 struct nfs4_delegreturndata *d_data;
3935
3936 d_data = (struct nfs4_delegreturndata *)data;
3937
3938 if (nfs4_setup_sequence(d_data->res.server,
3939 &d_data->args.seq_args,
3940 &d_data->res.seq_res, task))
3941 return;
3942 rpc_call_start(task);
3943}
3944#endif /* CONFIG_NFS_V4_1 */
3945
3946static const struct rpc_call_ops nfs4_delegreturn_ops = {
3947#if defined(CONFIG_NFS_V4_1)
3948 .rpc_call_prepare = nfs4_delegreturn_prepare,
3949#endif /* CONFIG_NFS_V4_1 */
3950 .rpc_call_done = nfs4_delegreturn_done,
3951 .rpc_release = nfs4_delegreturn_release,
3952};
3953
3954static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3955{
3956 struct nfs4_delegreturndata *data;
3957 struct nfs_server *server = NFS_SERVER(inode);
3958 struct rpc_task *task;
3959 struct rpc_message msg = {
3960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3961 .rpc_cred = cred,
3962 };
3963 struct rpc_task_setup task_setup_data = {
3964 .rpc_client = server->client,
3965 .rpc_message = &msg,
3966 .callback_ops = &nfs4_delegreturn_ops,
3967 .flags = RPC_TASK_ASYNC,
3968 };
3969 int status = 0;
3970
3971 data = kzalloc(sizeof(*data), GFP_NOFS);
3972 if (data == NULL)
3973 return -ENOMEM;
3974 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3975 data->args.fhandle = &data->fh;
3976 data->args.stateid = &data->stateid;
3977 data->args.bitmask = server->attr_bitmask;
3978 nfs_copy_fh(&data->fh, NFS_FH(inode));
3979 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3980 data->res.fattr = &data->fattr;
3981 data->res.server = server;
3982 nfs_fattr_init(data->res.fattr);
3983 data->timestamp = jiffies;
3984 data->rpc_status = 0;
3985
3986 task_setup_data.callback_data = data;
3987 msg.rpc_argp = &data->args;
3988 msg.rpc_resp = &data->res;
3989 task = rpc_run_task(&task_setup_data);
3990 if (IS_ERR(task))
3991 return PTR_ERR(task);
3992 if (!issync)
3993 goto out;
3994 status = nfs4_wait_for_completion_rpc_task(task);
3995 if (status != 0)
3996 goto out;
3997 status = data->rpc_status;
3998 if (status != 0)
3999 goto out;
4000 nfs_refresh_inode(inode, &data->fattr);
4001out:
4002 rpc_put_task(task);
4003 return status;
4004}
4005
4006int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4007{
4008 struct nfs_server *server = NFS_SERVER(inode);
4009 struct nfs4_exception exception = { };
4010 int err;
4011 do {
4012 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4013 switch (err) {
4014 case -NFS4ERR_STALE_STATEID:
4015 case -NFS4ERR_EXPIRED:
4016 case 0:
4017 return 0;
4018 }
4019 err = nfs4_handle_exception(server, err, &exception);
4020 } while (exception.retry);
4021 return err;
4022}
4023
4024#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4025#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4026
4027/*
4028 * sleep, with exponential backoff, and retry the LOCK operation.
4029 */
4030static unsigned long
4031nfs4_set_lock_task_retry(unsigned long timeout)
4032{
4033 freezable_schedule_timeout_killable(timeout);
4034 timeout <<= 1;
4035 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4036 return NFS4_LOCK_MAXTIMEOUT;
4037 return timeout;
4038}
4039
4040static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4041{
4042 struct inode *inode = state->inode;
4043 struct nfs_server *server = NFS_SERVER(inode);
4044 struct nfs_client *clp = server->nfs_client;
4045 struct nfs_lockt_args arg = {
4046 .fh = NFS_FH(inode),
4047 .fl = request,
4048 };
4049 struct nfs_lockt_res res = {
4050 .denied = request,
4051 };
4052 struct rpc_message msg = {
4053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4054 .rpc_argp = &arg,
4055 .rpc_resp = &res,
4056 .rpc_cred = state->owner->so_cred,
4057 };
4058 struct nfs4_lock_state *lsp;
4059 int status;
4060
4061 arg.lock_owner.clientid = clp->cl_clientid;
4062 status = nfs4_set_lock_state(state, request);
4063 if (status != 0)
4064 goto out;
4065 lsp = request->fl_u.nfs4_fl.owner;
4066 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4067 arg.lock_owner.s_dev = server->s_dev;
4068 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4069 switch (status) {
4070 case 0:
4071 request->fl_type = F_UNLCK;
4072 break;
4073 case -NFS4ERR_DENIED:
4074 status = 0;
4075 }
4076 request->fl_ops->fl_release_private(request);
4077out:
4078 return status;
4079}
4080
4081static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4082{
4083 struct nfs4_exception exception = { };
4084 int err;
4085
4086 do {
4087 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4088 _nfs4_proc_getlk(state, cmd, request),
4089 &exception);
4090 } while (exception.retry);
4091 return err;
4092}
4093
4094static int do_vfs_lock(struct file *file, struct file_lock *fl)
4095{
4096 int res = 0;
4097 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4098 case FL_POSIX:
4099 res = posix_lock_file_wait(file, fl);
4100 break;
4101 case FL_FLOCK:
4102 res = flock_lock_file_wait(file, fl);
4103 break;
4104 default:
4105 BUG();
4106 }
4107 return res;
4108}
4109
4110struct nfs4_unlockdata {
4111 struct nfs_locku_args arg;
4112 struct nfs_locku_res res;
4113 struct nfs4_lock_state *lsp;
4114 struct nfs_open_context *ctx;
4115 struct file_lock fl;
4116 const struct nfs_server *server;
4117 unsigned long timestamp;
4118};
4119
4120static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4121 struct nfs_open_context *ctx,
4122 struct nfs4_lock_state *lsp,
4123 struct nfs_seqid *seqid)
4124{
4125 struct nfs4_unlockdata *p;
4126 struct inode *inode = lsp->ls_state->inode;
4127
4128 p = kzalloc(sizeof(*p), GFP_NOFS);
4129 if (p == NULL)
4130 return NULL;
4131 p->arg.fh = NFS_FH(inode);
4132 p->arg.fl = &p->fl;
4133 p->arg.seqid = seqid;
4134 p->res.seqid = seqid;
4135 p->arg.stateid = &lsp->ls_stateid;
4136 p->lsp = lsp;
4137 atomic_inc(&lsp->ls_count);
4138 /* Ensure we don't close file until we're done freeing locks! */
4139 p->ctx = get_nfs_open_context(ctx);
4140 memcpy(&p->fl, fl, sizeof(p->fl));
4141 p->server = NFS_SERVER(inode);
4142 return p;
4143}
4144
4145static void nfs4_locku_release_calldata(void *data)
4146{
4147 struct nfs4_unlockdata *calldata = data;
4148 nfs_free_seqid(calldata->arg.seqid);
4149 nfs4_put_lock_state(calldata->lsp);
4150 put_nfs_open_context(calldata->ctx);
4151 kfree(calldata);
4152}
4153
4154static void nfs4_locku_done(struct rpc_task *task, void *data)
4155{
4156 struct nfs4_unlockdata *calldata = data;
4157
4158 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4159 return;
4160 switch (task->tk_status) {
4161 case 0:
4162 memcpy(calldata->lsp->ls_stateid.data,
4163 calldata->res.stateid.data,
4164 sizeof(calldata->lsp->ls_stateid.data));
4165 renew_lease(calldata->server, calldata->timestamp);
4166 break;
4167 case -NFS4ERR_BAD_STATEID:
4168 case -NFS4ERR_OLD_STATEID:
4169 case -NFS4ERR_STALE_STATEID:
4170 case -NFS4ERR_EXPIRED:
4171 break;
4172 default:
4173 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4174 rpc_restart_call_prepare(task);
4175 }
4176}
4177
4178static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4179{
4180 struct nfs4_unlockdata *calldata = data;
4181
4182 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4183 return;
4184 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4185 /* Note: exit _without_ running nfs4_locku_done */
4186 task->tk_action = NULL;
4187 return;
4188 }
4189 calldata->timestamp = jiffies;
4190 if (nfs4_setup_sequence(calldata->server,
4191 &calldata->arg.seq_args,
4192 &calldata->res.seq_res, task))
4193 return;
4194 rpc_call_start(task);
4195}
4196
4197static const struct rpc_call_ops nfs4_locku_ops = {
4198 .rpc_call_prepare = nfs4_locku_prepare,
4199 .rpc_call_done = nfs4_locku_done,
4200 .rpc_release = nfs4_locku_release_calldata,
4201};
4202
4203static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4204 struct nfs_open_context *ctx,
4205 struct nfs4_lock_state *lsp,
4206 struct nfs_seqid *seqid)
4207{
4208 struct nfs4_unlockdata *data;
4209 struct rpc_message msg = {
4210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4211 .rpc_cred = ctx->cred,
4212 };
4213 struct rpc_task_setup task_setup_data = {
4214 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4215 .rpc_message = &msg,
4216 .callback_ops = &nfs4_locku_ops,
4217 .workqueue = nfsiod_workqueue,
4218 .flags = RPC_TASK_ASYNC,
4219 };
4220
4221 /* Ensure this is an unlock - when canceling a lock, the
4222 * canceled lock is passed in, and it won't be an unlock.
4223 */
4224 fl->fl_type = F_UNLCK;
4225
4226 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4227 if (data == NULL) {
4228 nfs_free_seqid(seqid);
4229 return ERR_PTR(-ENOMEM);
4230 }
4231
4232 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4233 msg.rpc_argp = &data->arg;
4234 msg.rpc_resp = &data->res;
4235 task_setup_data.callback_data = data;
4236 return rpc_run_task(&task_setup_data);
4237}
4238
4239static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4240{
4241 struct nfs_inode *nfsi = NFS_I(state->inode);
4242 struct nfs_seqid *seqid;
4243 struct nfs4_lock_state *lsp;
4244 struct rpc_task *task;
4245 int status = 0;
4246 unsigned char fl_flags = request->fl_flags;
4247
4248 status = nfs4_set_lock_state(state, request);
4249 /* Unlock _before_ we do the RPC call */
4250 request->fl_flags |= FL_EXISTS;
4251 down_read(&nfsi->rwsem);
4252 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4253 up_read(&nfsi->rwsem);
4254 goto out;
4255 }
4256 up_read(&nfsi->rwsem);
4257 if (status != 0)
4258 goto out;
4259 /* Is this a delegated lock? */
4260 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4261 goto out;
4262 lsp = request->fl_u.nfs4_fl.owner;
4263 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4264 status = -ENOMEM;
4265 if (seqid == NULL)
4266 goto out;
4267 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4268 status = PTR_ERR(task);
4269 if (IS_ERR(task))
4270 goto out;
4271 status = nfs4_wait_for_completion_rpc_task(task);
4272 rpc_put_task(task);
4273out:
4274 request->fl_flags = fl_flags;
4275 return status;
4276}
4277
4278struct nfs4_lockdata {
4279 struct nfs_lock_args arg;
4280 struct nfs_lock_res res;
4281 struct nfs4_lock_state *lsp;
4282 struct nfs_open_context *ctx;
4283 struct file_lock fl;
4284 unsigned long timestamp;
4285 int rpc_status;
4286 int cancelled;
4287 struct nfs_server *server;
4288};
4289
4290static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4291 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4292 gfp_t gfp_mask)
4293{
4294 struct nfs4_lockdata *p;
4295 struct inode *inode = lsp->ls_state->inode;
4296 struct nfs_server *server = NFS_SERVER(inode);
4297
4298 p = kzalloc(sizeof(*p), gfp_mask);
4299 if (p == NULL)
4300 return NULL;
4301
4302 p->arg.fh = NFS_FH(inode);
4303 p->arg.fl = &p->fl;
4304 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4305 if (p->arg.open_seqid == NULL)
4306 goto out_free;
4307 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4308 if (p->arg.lock_seqid == NULL)
4309 goto out_free_seqid;
4310 p->arg.lock_stateid = &lsp->ls_stateid;
4311 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4312 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4313 p->arg.lock_owner.s_dev = server->s_dev;
4314 p->res.lock_seqid = p->arg.lock_seqid;
4315 p->lsp = lsp;
4316 p->server = server;
4317 atomic_inc(&lsp->ls_count);
4318 p->ctx = get_nfs_open_context(ctx);
4319 memcpy(&p->fl, fl, sizeof(p->fl));
4320 return p;
4321out_free_seqid:
4322 nfs_free_seqid(p->arg.open_seqid);
4323out_free:
4324 kfree(p);
4325 return NULL;
4326}
4327
4328static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4329{
4330 struct nfs4_lockdata *data = calldata;
4331 struct nfs4_state *state = data->lsp->ls_state;
4332
4333 dprintk("%s: begin!\n", __func__);
4334 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4335 return;
4336 /* Do we need to do an open_to_lock_owner? */
4337 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4338 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4339 return;
4340 data->arg.open_stateid = &state->stateid;
4341 data->arg.new_lock_owner = 1;
4342 data->res.open_seqid = data->arg.open_seqid;
4343 } else
4344 data->arg.new_lock_owner = 0;
4345 data->timestamp = jiffies;
4346 if (nfs4_setup_sequence(data->server,
4347 &data->arg.seq_args,
4348 &data->res.seq_res, task))
4349 return;
4350 rpc_call_start(task);
4351 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4352}
4353
4354static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4355{
4356 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4357 nfs4_lock_prepare(task, calldata);
4358}
4359
4360static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4361{
4362 struct nfs4_lockdata *data = calldata;
4363
4364 dprintk("%s: begin!\n", __func__);
4365
4366 if (!nfs4_sequence_done(task, &data->res.seq_res))
4367 return;
4368
4369 data->rpc_status = task->tk_status;
4370 if (data->arg.new_lock_owner != 0) {
4371 if (data->rpc_status == 0)
4372 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4373 else
4374 goto out;
4375 }
4376 if (data->rpc_status == 0) {
4377 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4378 sizeof(data->lsp->ls_stateid.data));
4379 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4380 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4381 }
4382out:
4383 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4384}
4385
4386static void nfs4_lock_release(void *calldata)
4387{
4388 struct nfs4_lockdata *data = calldata;
4389
4390 dprintk("%s: begin!\n", __func__);
4391 nfs_free_seqid(data->arg.open_seqid);
4392 if (data->cancelled != 0) {
4393 struct rpc_task *task;
4394 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4395 data->arg.lock_seqid);
4396 if (!IS_ERR(task))
4397 rpc_put_task_async(task);
4398 dprintk("%s: cancelling lock!\n", __func__);
4399 } else
4400 nfs_free_seqid(data->arg.lock_seqid);
4401 nfs4_put_lock_state(data->lsp);
4402 put_nfs_open_context(data->ctx);
4403 kfree(data);
4404 dprintk("%s: done!\n", __func__);
4405}
4406
4407static const struct rpc_call_ops nfs4_lock_ops = {
4408 .rpc_call_prepare = nfs4_lock_prepare,
4409 .rpc_call_done = nfs4_lock_done,
4410 .rpc_release = nfs4_lock_release,
4411};
4412
4413static const struct rpc_call_ops nfs4_recover_lock_ops = {
4414 .rpc_call_prepare = nfs4_recover_lock_prepare,
4415 .rpc_call_done = nfs4_lock_done,
4416 .rpc_release = nfs4_lock_release,
4417};
4418
4419static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4420{
4421 switch (error) {
4422 case -NFS4ERR_ADMIN_REVOKED:
4423 case -NFS4ERR_BAD_STATEID:
4424 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4425 if (new_lock_owner != 0 ||
4426 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4427 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4428 break;
4429 case -NFS4ERR_STALE_STATEID:
4430 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4431 case -NFS4ERR_EXPIRED:
4432 nfs4_schedule_lease_recovery(server->nfs_client);
4433 };
4434}
4435
4436static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4437{
4438 struct nfs4_lockdata *data;
4439 struct rpc_task *task;
4440 struct rpc_message msg = {
4441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4442 .rpc_cred = state->owner->so_cred,
4443 };
4444 struct rpc_task_setup task_setup_data = {
4445 .rpc_client = NFS_CLIENT(state->inode),
4446 .rpc_message = &msg,
4447 .callback_ops = &nfs4_lock_ops,
4448 .workqueue = nfsiod_workqueue,
4449 .flags = RPC_TASK_ASYNC,
4450 };
4451 int ret;
4452
4453 dprintk("%s: begin!\n", __func__);
4454 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4455 fl->fl_u.nfs4_fl.owner,
4456 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4457 if (data == NULL)
4458 return -ENOMEM;
4459 if (IS_SETLKW(cmd))
4460 data->arg.block = 1;
4461 if (recovery_type > NFS_LOCK_NEW) {
4462 if (recovery_type == NFS_LOCK_RECLAIM)
4463 data->arg.reclaim = NFS_LOCK_RECLAIM;
4464 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4465 }
4466 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4467 msg.rpc_argp = &data->arg;
4468 msg.rpc_resp = &data->res;
4469 task_setup_data.callback_data = data;
4470 task = rpc_run_task(&task_setup_data);
4471 if (IS_ERR(task))
4472 return PTR_ERR(task);
4473 ret = nfs4_wait_for_completion_rpc_task(task);
4474 if (ret == 0) {
4475 ret = data->rpc_status;
4476 if (ret)
4477 nfs4_handle_setlk_error(data->server, data->lsp,
4478 data->arg.new_lock_owner, ret);
4479 } else
4480 data->cancelled = 1;
4481 rpc_put_task(task);
4482 dprintk("%s: done, ret = %d!\n", __func__, ret);
4483 return ret;
4484}
4485
4486static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4487{
4488 struct nfs_server *server = NFS_SERVER(state->inode);
4489 struct nfs4_exception exception = { };
4490 int err;
4491
4492 do {
4493 /* Cache the lock if possible... */
4494 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4495 return 0;
4496 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4497 if (err != -NFS4ERR_DELAY)
4498 break;
4499 nfs4_handle_exception(server, err, &exception);
4500 } while (exception.retry);
4501 return err;
4502}
4503
4504static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4505{
4506 struct nfs_server *server = NFS_SERVER(state->inode);
4507 struct nfs4_exception exception = { };
4508 int err;
4509
4510 err = nfs4_set_lock_state(state, request);
4511 if (err != 0)
4512 return err;
4513 do {
4514 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4515 return 0;
4516 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4517 switch (err) {
4518 default:
4519 goto out;
4520 case -NFS4ERR_GRACE:
4521 case -NFS4ERR_DELAY:
4522 nfs4_handle_exception(server, err, &exception);
4523 err = 0;
4524 }
4525 } while (exception.retry);
4526out:
4527 return err;
4528}
4529
4530#if defined(CONFIG_NFS_V4_1)
4531static int nfs41_check_expired_locks(struct nfs4_state *state)
4532{
4533 int status, ret = NFS_OK;
4534 struct nfs4_lock_state *lsp;
4535 struct nfs_server *server = NFS_SERVER(state->inode);
4536
4537 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4538 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4539 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4540 if (status != NFS_OK) {
4541 nfs41_free_stateid(server, &lsp->ls_stateid);
4542 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4543 ret = status;
4544 }
4545 }
4546 };
4547
4548 return ret;
4549}
4550
4551static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4552{
4553 int status = NFS_OK;
4554
4555 if (test_bit(LK_STATE_IN_USE, &state->flags))
4556 status = nfs41_check_expired_locks(state);
4557 if (status == NFS_OK)
4558 return status;
4559 return nfs4_lock_expired(state, request);
4560}
4561#endif
4562
4563static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4564{
4565 struct nfs_inode *nfsi = NFS_I(state->inode);
4566 unsigned char fl_flags = request->fl_flags;
4567 int status = -ENOLCK;
4568
4569 if ((fl_flags & FL_POSIX) &&
4570 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4571 goto out;
4572 /* Is this a delegated open? */
4573 status = nfs4_set_lock_state(state, request);
4574 if (status != 0)
4575 goto out;
4576 request->fl_flags |= FL_ACCESS;
4577 status = do_vfs_lock(request->fl_file, request);
4578 if (status < 0)
4579 goto out;
4580 down_read(&nfsi->rwsem);
4581 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4582 /* Yes: cache locks! */
4583 /* ...but avoid races with delegation recall... */
4584 request->fl_flags = fl_flags & ~FL_SLEEP;
4585 status = do_vfs_lock(request->fl_file, request);
4586 goto out_unlock;
4587 }
4588 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4589 if (status != 0)
4590 goto out_unlock;
4591 /* Note: we always want to sleep here! */
4592 request->fl_flags = fl_flags | FL_SLEEP;
4593 if (do_vfs_lock(request->fl_file, request) < 0)
4594 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4595 "manager!\n", __func__);
4596out_unlock:
4597 up_read(&nfsi->rwsem);
4598out:
4599 request->fl_flags = fl_flags;
4600 return status;
4601}
4602
4603static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4604{
4605 struct nfs4_exception exception = { };
4606 int err;
4607
4608 do {
4609 err = _nfs4_proc_setlk(state, cmd, request);
4610 if (err == -NFS4ERR_DENIED)
4611 err = -EAGAIN;
4612 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4613 err, &exception);
4614 } while (exception.retry);
4615 return err;
4616}
4617
4618static int
4619nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4620{
4621 struct nfs_open_context *ctx;
4622 struct nfs4_state *state;
4623 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4624 int status;
4625
4626 /* verify open state */
4627 ctx = nfs_file_open_context(filp);
4628 state = ctx->state;
4629
4630 if (request->fl_start < 0 || request->fl_end < 0)
4631 return -EINVAL;
4632
4633 if (IS_GETLK(cmd)) {
4634 if (state != NULL)
4635 return nfs4_proc_getlk(state, F_GETLK, request);
4636 return 0;
4637 }
4638
4639 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4640 return -EINVAL;
4641
4642 if (request->fl_type == F_UNLCK) {
4643 if (state != NULL)
4644 return nfs4_proc_unlck(state, cmd, request);
4645 return 0;
4646 }
4647
4648 if (state == NULL)
4649 return -ENOLCK;
4650 do {
4651 status = nfs4_proc_setlk(state, cmd, request);
4652 if ((status != -EAGAIN) || IS_SETLK(cmd))
4653 break;
4654 timeout = nfs4_set_lock_task_retry(timeout);
4655 status = -ERESTARTSYS;
4656 if (signalled())
4657 break;
4658 } while(status < 0);
4659 return status;
4660}
4661
4662int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4663{
4664 struct nfs_server *server = NFS_SERVER(state->inode);
4665 struct nfs4_exception exception = { };
4666 int err;
4667
4668 err = nfs4_set_lock_state(state, fl);
4669 if (err != 0)
4670 goto out;
4671 do {
4672 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4673 switch (err) {
4674 default:
4675 printk(KERN_ERR "NFS: %s: unhandled error "
4676 "%d.\n", __func__, err);
4677 case 0:
4678 case -ESTALE:
4679 goto out;
4680 case -NFS4ERR_EXPIRED:
4681 nfs4_schedule_stateid_recovery(server, state);
4682 case -NFS4ERR_STALE_CLIENTID:
4683 case -NFS4ERR_STALE_STATEID:
4684 nfs4_schedule_lease_recovery(server->nfs_client);
4685 goto out;
4686 case -NFS4ERR_BADSESSION:
4687 case -NFS4ERR_BADSLOT:
4688 case -NFS4ERR_BAD_HIGH_SLOT:
4689 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4690 case -NFS4ERR_DEADSESSION:
4691 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4692 goto out;
4693 case -ERESTARTSYS:
4694 /*
4695 * The show must go on: exit, but mark the
4696 * stateid as needing recovery.
4697 */
4698 case -NFS4ERR_ADMIN_REVOKED:
4699 case -NFS4ERR_BAD_STATEID:
4700 case -NFS4ERR_OPENMODE:
4701 nfs4_schedule_stateid_recovery(server, state);
4702 err = 0;
4703 goto out;
4704 case -EKEYEXPIRED:
4705 /*
4706 * User RPCSEC_GSS context has expired.
4707 * We cannot recover this stateid now, so
4708 * skip it and allow recovery thread to
4709 * proceed.
4710 */
4711 err = 0;
4712 goto out;
4713 case -ENOMEM:
4714 case -NFS4ERR_DENIED:
4715 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4716 err = 0;
4717 goto out;
4718 case -NFS4ERR_DELAY:
4719 break;
4720 }
4721 err = nfs4_handle_exception(server, err, &exception);
4722 } while (exception.retry);
4723out:
4724 return err;
4725}
4726
4727static void nfs4_release_lockowner_release(void *calldata)
4728{
4729 kfree(calldata);
4730}
4731
4732const struct rpc_call_ops nfs4_release_lockowner_ops = {
4733 .rpc_release = nfs4_release_lockowner_release,
4734};
4735
4736void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4737{
4738 struct nfs_server *server = lsp->ls_state->owner->so_server;
4739 struct nfs_release_lockowner_args *args;
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4742 };
4743
4744 if (server->nfs_client->cl_mvops->minor_version != 0)
4745 return;
4746 args = kmalloc(sizeof(*args), GFP_NOFS);
4747 if (!args)
4748 return;
4749 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4750 args->lock_owner.id = lsp->ls_seqid.owner_id;
4751 args->lock_owner.s_dev = server->s_dev;
4752 msg.rpc_argp = args;
4753 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4754}
4755
4756#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4757
4758static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4759 const void *buf, size_t buflen,
4760 int flags, int type)
4761{
4762 if (strcmp(key, "") != 0)
4763 return -EINVAL;
4764
4765 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4766}
4767
4768static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4769 void *buf, size_t buflen, int type)
4770{
4771 if (strcmp(key, "") != 0)
4772 return -EINVAL;
4773
4774 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4775}
4776
4777static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4778 size_t list_len, const char *name,
4779 size_t name_len, int type)
4780{
4781 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4782
4783 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4784 return 0;
4785
4786 if (list && len <= list_len)
4787 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4788 return len;
4789}
4790
4791/*
4792 * nfs_fhget will use either the mounted_on_fileid or the fileid
4793 */
4794static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4795{
4796 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4797 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4798 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4799 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4800 return;
4801
4802 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4803 NFS_ATTR_FATTR_NLINK;
4804 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4805 fattr->nlink = 2;
4806}
4807
4808int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4809 struct nfs4_fs_locations *fs_locations, struct page *page)
4810{
4811 struct nfs_server *server = NFS_SERVER(dir);
4812 u32 bitmask[2] = {
4813 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4814 };
4815 struct nfs4_fs_locations_arg args = {
4816 .dir_fh = NFS_FH(dir),
4817 .name = name,
4818 .page = page,
4819 .bitmask = bitmask,
4820 };
4821 struct nfs4_fs_locations_res res = {
4822 .fs_locations = fs_locations,
4823 };
4824 struct rpc_message msg = {
4825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4826 .rpc_argp = &args,
4827 .rpc_resp = &res,
4828 };
4829 int status;
4830
4831 dprintk("%s: start\n", __func__);
4832
4833 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4834 * is not supported */
4835 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4836 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4837 else
4838 bitmask[0] |= FATTR4_WORD0_FILEID;
4839
4840 nfs_fattr_init(&fs_locations->fattr);
4841 fs_locations->server = server;
4842 fs_locations->nlocations = 0;
4843 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4844 dprintk("%s: returned status = %d\n", __func__, status);
4845 return status;
4846}
4847
4848static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4849{
4850 int status;
4851 struct nfs4_secinfo_arg args = {
4852 .dir_fh = NFS_FH(dir),
4853 .name = name,
4854 };
4855 struct nfs4_secinfo_res res = {
4856 .flavors = flavors,
4857 };
4858 struct rpc_message msg = {
4859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4860 .rpc_argp = &args,
4861 .rpc_resp = &res,
4862 };
4863
4864 dprintk("NFS call secinfo %s\n", name->name);
4865 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4866 dprintk("NFS reply secinfo: %d\n", status);
4867 return status;
4868}
4869
4870int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4871{
4872 struct nfs4_exception exception = { };
4873 int err;
4874 do {
4875 err = nfs4_handle_exception(NFS_SERVER(dir),
4876 _nfs4_proc_secinfo(dir, name, flavors),
4877 &exception);
4878 } while (exception.retry);
4879 return err;
4880}
4881
4882#ifdef CONFIG_NFS_V4_1
4883/*
4884 * Check the exchange flags returned by the server for invalid flags, having
4885 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4886 * DS flags set.
4887 */
4888static int nfs4_check_cl_exchange_flags(u32 flags)
4889{
4890 if (flags & ~EXCHGID4_FLAG_MASK_R)
4891 goto out_inval;
4892 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4893 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4894 goto out_inval;
4895 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4896 goto out_inval;
4897 return NFS_OK;
4898out_inval:
4899 return -NFS4ERR_INVAL;
4900}
4901
4902static bool
4903nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4904{
4905 if (a->server_scope_sz == b->server_scope_sz &&
4906 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4907 return true;
4908
4909 return false;
4910}
4911
4912/*
4913 * nfs4_proc_exchange_id()
4914 *
4915 * Since the clientid has expired, all compounds using sessions
4916 * associated with the stale clientid will be returning
4917 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4918 * be in some phase of session reset.
4919 */
4920int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4921{
4922 nfs4_verifier verifier;
4923 struct nfs41_exchange_id_args args = {
4924 .client = clp,
4925 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4926 };
4927 struct nfs41_exchange_id_res res = {
4928 .client = clp,
4929 };
4930 int status;
4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4933 .rpc_argp = &args,
4934 .rpc_resp = &res,
4935 .rpc_cred = cred,
4936 };
4937 __be32 *p;
4938
4939 dprintk("--> %s\n", __func__);
4940 BUG_ON(clp == NULL);
4941
4942 p = (u32 *)verifier.data;
4943 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4944 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4945 args.verifier = &verifier;
4946
4947 args.id_len = scnprintf(args.id, sizeof(args.id),
4948 "%s/%s.%s/%u",
4949 clp->cl_ipaddr,
4950 init_utsname()->nodename,
4951 init_utsname()->domainname,
4952 clp->cl_rpcclient->cl_auth->au_flavor);
4953
4954 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4955 if (unlikely(!res.server_scope)) {
4956 status = -ENOMEM;
4957 goto out;
4958 }
4959
4960 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4961 if (unlikely(!res.impl_id)) {
4962 status = -ENOMEM;
4963 goto out_server_scope;
4964 }
4965
4966 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4967 if (!status)
4968 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4969
4970 if (!status) {
4971 /* use the most recent implementation id */
4972 kfree(clp->impl_id);
4973 clp->impl_id = res.impl_id;
4974 } else
4975 kfree(res.impl_id);
4976
4977 if (!status) {
4978 if (clp->server_scope &&
4979 !nfs41_same_server_scope(clp->server_scope,
4980 res.server_scope)) {
4981 dprintk("%s: server_scope mismatch detected\n",
4982 __func__);
4983 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4984 kfree(clp->server_scope);
4985 clp->server_scope = NULL;
4986 }
4987
4988 if (!clp->server_scope) {
4989 clp->server_scope = res.server_scope;
4990 goto out;
4991 }
4992 }
4993
4994out_server_scope:
4995 kfree(res.server_scope);
4996out:
4997 if (clp->impl_id)
4998 dprintk("%s: Server Implementation ID: "
4999 "domain: %s, name: %s, date: %llu,%u\n",
5000 __func__, clp->impl_id->domain, clp->impl_id->name,
5001 clp->impl_id->date.seconds,
5002 clp->impl_id->date.nseconds);
5003 dprintk("<-- %s status= %d\n", __func__, status);
5004 return status;
5005}
5006
5007struct nfs4_get_lease_time_data {
5008 struct nfs4_get_lease_time_args *args;
5009 struct nfs4_get_lease_time_res *res;
5010 struct nfs_client *clp;
5011};
5012
5013static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5014 void *calldata)
5015{
5016 int ret;
5017 struct nfs4_get_lease_time_data *data =
5018 (struct nfs4_get_lease_time_data *)calldata;
5019
5020 dprintk("--> %s\n", __func__);
5021 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5022 /* just setup sequence, do not trigger session recovery
5023 since we're invoked within one */
5024 ret = nfs41_setup_sequence(data->clp->cl_session,
5025 &data->args->la_seq_args,
5026 &data->res->lr_seq_res, task);
5027
5028 BUG_ON(ret == -EAGAIN);
5029 rpc_call_start(task);
5030 dprintk("<-- %s\n", __func__);
5031}
5032
5033/*
5034 * Called from nfs4_state_manager thread for session setup, so don't recover
5035 * from sequence operation or clientid errors.
5036 */
5037static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5038{
5039 struct nfs4_get_lease_time_data *data =
5040 (struct nfs4_get_lease_time_data *)calldata;
5041
5042 dprintk("--> %s\n", __func__);
5043 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5044 return;
5045 switch (task->tk_status) {
5046 case -NFS4ERR_DELAY:
5047 case -NFS4ERR_GRACE:
5048 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5049 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5050 task->tk_status = 0;
5051 /* fall through */
5052 case -NFS4ERR_RETRY_UNCACHED_REP:
5053 rpc_restart_call_prepare(task);
5054 return;
5055 }
5056 dprintk("<-- %s\n", __func__);
5057}
5058
5059struct rpc_call_ops nfs4_get_lease_time_ops = {
5060 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5061 .rpc_call_done = nfs4_get_lease_time_done,
5062};
5063
5064int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5065{
5066 struct rpc_task *task;
5067 struct nfs4_get_lease_time_args args;
5068 struct nfs4_get_lease_time_res res = {
5069 .lr_fsinfo = fsinfo,
5070 };
5071 struct nfs4_get_lease_time_data data = {
5072 .args = &args,
5073 .res = &res,
5074 .clp = clp,
5075 };
5076 struct rpc_message msg = {
5077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5078 .rpc_argp = &args,
5079 .rpc_resp = &res,
5080 };
5081 struct rpc_task_setup task_setup = {
5082 .rpc_client = clp->cl_rpcclient,
5083 .rpc_message = &msg,
5084 .callback_ops = &nfs4_get_lease_time_ops,
5085 .callback_data = &data,
5086 .flags = RPC_TASK_TIMEOUT,
5087 };
5088 int status;
5089
5090 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5091 dprintk("--> %s\n", __func__);
5092 task = rpc_run_task(&task_setup);
5093
5094 if (IS_ERR(task))
5095 status = PTR_ERR(task);
5096 else {
5097 status = task->tk_status;
5098 rpc_put_task(task);
5099 }
5100 dprintk("<-- %s return %d\n", __func__, status);
5101
5102 return status;
5103}
5104
5105/*
5106 * Reset a slot table
5107 */
5108static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5109 int ivalue)
5110{
5111 struct nfs4_slot *new = NULL;
5112 int i;
5113 int ret = 0;
5114
5115 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5116 max_reqs, tbl->max_slots);
5117
5118 /* Does the newly negotiated max_reqs match the existing slot table? */
5119 if (max_reqs != tbl->max_slots) {
5120 ret = -ENOMEM;
5121 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5122 GFP_NOFS);
5123 if (!new)
5124 goto out;
5125 ret = 0;
5126 kfree(tbl->slots);
5127 }
5128 spin_lock(&tbl->slot_tbl_lock);
5129 if (new) {
5130 tbl->slots = new;
5131 tbl->max_slots = max_reqs;
5132 }
5133 for (i = 0; i < tbl->max_slots; ++i)
5134 tbl->slots[i].seq_nr = ivalue;
5135 spin_unlock(&tbl->slot_tbl_lock);
5136 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5137 tbl, tbl->slots, tbl->max_slots);
5138out:
5139 dprintk("<-- %s: return %d\n", __func__, ret);
5140 return ret;
5141}
5142
5143/* Destroy the slot table */
5144static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5145{
5146 if (session->fc_slot_table.slots != NULL) {
5147 kfree(session->fc_slot_table.slots);
5148 session->fc_slot_table.slots = NULL;
5149 }
5150 if (session->bc_slot_table.slots != NULL) {
5151 kfree(session->bc_slot_table.slots);
5152 session->bc_slot_table.slots = NULL;
5153 }
5154 return;
5155}
5156
5157/*
5158 * Initialize slot table
5159 */
5160static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5161 int max_slots, int ivalue)
5162{
5163 struct nfs4_slot *slot;
5164 int ret = -ENOMEM;
5165
5166 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5167
5168 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5169
5170 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5171 if (!slot)
5172 goto out;
5173 ret = 0;
5174
5175 spin_lock(&tbl->slot_tbl_lock);
5176 tbl->max_slots = max_slots;
5177 tbl->slots = slot;
5178 tbl->highest_used_slotid = NFS4_NO_SLOT; /* no slot is currently used */
5179 spin_unlock(&tbl->slot_tbl_lock);
5180 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5181 tbl, tbl->slots, tbl->max_slots);
5182out:
5183 dprintk("<-- %s: return %d\n", __func__, ret);
5184 return ret;
5185}
5186
5187/*
5188 * Initialize or reset the forechannel and backchannel tables
5189 */
5190static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5191{
5192 struct nfs4_slot_table *tbl;
5193 int status;
5194
5195 dprintk("--> %s\n", __func__);
5196 /* Fore channel */
5197 tbl = &ses->fc_slot_table;
5198 if (tbl->slots == NULL) {
5199 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5200 if (status) /* -ENOMEM */
5201 return status;
5202 } else {
5203 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5204 if (status)
5205 return status;
5206 }
5207 /* Back channel */
5208 tbl = &ses->bc_slot_table;
5209 if (tbl->slots == NULL) {
5210 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5211 if (status)
5212 /* Fore and back channel share a connection so get
5213 * both slot tables or neither */
5214 nfs4_destroy_slot_tables(ses);
5215 } else
5216 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5217 return status;
5218}
5219
5220struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5221{
5222 struct nfs4_session *session;
5223 struct nfs4_slot_table *tbl;
5224
5225 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5226 if (!session)
5227 return NULL;
5228
5229 tbl = &session->fc_slot_table;
5230 tbl->highest_used_slotid = NFS4_NO_SLOT;
5231 spin_lock_init(&tbl->slot_tbl_lock);
5232 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5233 init_completion(&tbl->complete);
5234
5235 tbl = &session->bc_slot_table;
5236 tbl->highest_used_slotid = NFS4_NO_SLOT;
5237 spin_lock_init(&tbl->slot_tbl_lock);
5238 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5239 init_completion(&tbl->complete);
5240
5241 session->session_state = 1<<NFS4_SESSION_INITING;
5242
5243 session->clp = clp;
5244 return session;
5245}
5246
5247void nfs4_destroy_session(struct nfs4_session *session)
5248{
5249 struct rpc_xprt *xprt;
5250
5251 nfs4_proc_destroy_session(session);
5252
5253 rcu_read_lock();
5254 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5255 rcu_read_unlock();
5256 dprintk("%s Destroy backchannel for xprt %p\n",
5257 __func__, xprt);
5258 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5259 nfs4_destroy_slot_tables(session);
5260 kfree(session);
5261}
5262
5263/*
5264 * Initialize the values to be used by the client in CREATE_SESSION
5265 * If nfs4_init_session set the fore channel request and response sizes,
5266 * use them.
5267 *
5268 * Set the back channel max_resp_sz_cached to zero to force the client to
5269 * always set csa_cachethis to FALSE because the current implementation
5270 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5271 */
5272static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5273{
5274 struct nfs4_session *session = args->client->cl_session;
5275 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5276 mxresp_sz = session->fc_attrs.max_resp_sz;
5277
5278 if (mxrqst_sz == 0)
5279 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5280 if (mxresp_sz == 0)
5281 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5282 /* Fore channel attributes */
5283 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5284 args->fc_attrs.max_resp_sz = mxresp_sz;
5285 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5286 args->fc_attrs.max_reqs = max_session_slots;
5287
5288 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5289 "max_ops=%u max_reqs=%u\n",
5290 __func__,
5291 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5292 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5293
5294 /* Back channel attributes */
5295 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5296 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5297 args->bc_attrs.max_resp_sz_cached = 0;
5298 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5299 args->bc_attrs.max_reqs = 1;
5300
5301 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5302 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5303 __func__,
5304 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5305 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5306 args->bc_attrs.max_reqs);
5307}
5308
5309static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5310{
5311 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5312 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5313
5314 if (rcvd->max_resp_sz > sent->max_resp_sz)
5315 return -EINVAL;
5316 /*
5317 * Our requested max_ops is the minimum we need; we're not
5318 * prepared to break up compounds into smaller pieces than that.
5319 * So, no point even trying to continue if the server won't
5320 * cooperate:
5321 */
5322 if (rcvd->max_ops < sent->max_ops)
5323 return -EINVAL;
5324 if (rcvd->max_reqs == 0)
5325 return -EINVAL;
5326 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5327 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5328 return 0;
5329}
5330
5331static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5332{
5333 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5334 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5335
5336 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5337 return -EINVAL;
5338 if (rcvd->max_resp_sz < sent->max_resp_sz)
5339 return -EINVAL;
5340 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5341 return -EINVAL;
5342 /* These would render the backchannel useless: */
5343 if (rcvd->max_ops != sent->max_ops)
5344 return -EINVAL;
5345 if (rcvd->max_reqs != sent->max_reqs)
5346 return -EINVAL;
5347 return 0;
5348}
5349
5350static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5351 struct nfs4_session *session)
5352{
5353 int ret;
5354
5355 ret = nfs4_verify_fore_channel_attrs(args, session);
5356 if (ret)
5357 return ret;
5358 return nfs4_verify_back_channel_attrs(args, session);
5359}
5360
5361static int _nfs4_proc_create_session(struct nfs_client *clp)
5362{
5363 struct nfs4_session *session = clp->cl_session;
5364 struct nfs41_create_session_args args = {
5365 .client = clp,
5366 .cb_program = NFS4_CALLBACK,
5367 };
5368 struct nfs41_create_session_res res = {
5369 .client = clp,
5370 };
5371 struct rpc_message msg = {
5372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5373 .rpc_argp = &args,
5374 .rpc_resp = &res,
5375 };
5376 int status;
5377
5378 nfs4_init_channel_attrs(&args);
5379 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5380
5381 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5382
5383 if (!status)
5384 /* Verify the session's negotiated channel_attrs values */
5385 status = nfs4_verify_channel_attrs(&args, session);
5386 if (!status) {
5387 /* Increment the clientid slot sequence id */
5388 clp->cl_seqid++;
5389 }
5390
5391 return status;
5392}
5393
5394/*
5395 * Issues a CREATE_SESSION operation to the server.
5396 * It is the responsibility of the caller to verify the session is
5397 * expired before calling this routine.
5398 */
5399int nfs4_proc_create_session(struct nfs_client *clp)
5400{
5401 int status;
5402 unsigned *ptr;
5403 struct nfs4_session *session = clp->cl_session;
5404
5405 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5406
5407 status = _nfs4_proc_create_session(clp);
5408 if (status)
5409 goto out;
5410
5411 /* Init or reset the session slot tables */
5412 status = nfs4_setup_session_slot_tables(session);
5413 dprintk("slot table setup returned %d\n", status);
5414 if (status)
5415 goto out;
5416
5417 ptr = (unsigned *)&session->sess_id.data[0];
5418 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5419 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5420out:
5421 dprintk("<-- %s\n", __func__);
5422 return status;
5423}
5424
5425/*
5426 * Issue the over-the-wire RPC DESTROY_SESSION.
5427 * The caller must serialize access to this routine.
5428 */
5429int nfs4_proc_destroy_session(struct nfs4_session *session)
5430{
5431 int status = 0;
5432 struct rpc_message msg;
5433
5434 dprintk("--> nfs4_proc_destroy_session\n");
5435
5436 /* session is still being setup */
5437 if (session->clp->cl_cons_state != NFS_CS_READY)
5438 return status;
5439
5440 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5441 msg.rpc_argp = session;
5442 msg.rpc_resp = NULL;
5443 msg.rpc_cred = NULL;
5444 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5445
5446 if (status)
5447 printk(KERN_WARNING
5448 "NFS: Got error %d from the server on DESTROY_SESSION. "
5449 "Session has been destroyed regardless...\n", status);
5450
5451 dprintk("<-- nfs4_proc_destroy_session\n");
5452 return status;
5453}
5454
5455int nfs4_init_session(struct nfs_server *server)
5456{
5457 struct nfs_client *clp = server->nfs_client;
5458 struct nfs4_session *session;
5459 unsigned int rsize, wsize;
5460 int ret;
5461
5462 if (!nfs4_has_session(clp))
5463 return 0;
5464
5465 session = clp->cl_session;
5466 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5467 return 0;
5468
5469 rsize = server->rsize;
5470 if (rsize == 0)
5471 rsize = NFS_MAX_FILE_IO_SIZE;
5472 wsize = server->wsize;
5473 if (wsize == 0)
5474 wsize = NFS_MAX_FILE_IO_SIZE;
5475
5476 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5477 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5478
5479 ret = nfs4_recover_expired_lease(server);
5480 if (!ret)
5481 ret = nfs4_check_client_ready(clp);
5482 return ret;
5483}
5484
5485int nfs4_init_ds_session(struct nfs_client *clp)
5486{
5487 struct nfs4_session *session = clp->cl_session;
5488 int ret;
5489
5490 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5491 return 0;
5492
5493 ret = nfs4_client_recover_expired_lease(clp);
5494 if (!ret)
5495 /* Test for the DS role */
5496 if (!is_ds_client(clp))
5497 ret = -ENODEV;
5498 if (!ret)
5499 ret = nfs4_check_client_ready(clp);
5500 return ret;
5501
5502}
5503EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5504
5505
5506/*
5507 * Renew the cl_session lease.
5508 */
5509struct nfs4_sequence_data {
5510 struct nfs_client *clp;
5511 struct nfs4_sequence_args args;
5512 struct nfs4_sequence_res res;
5513};
5514
5515static void nfs41_sequence_release(void *data)
5516{
5517 struct nfs4_sequence_data *calldata = data;
5518 struct nfs_client *clp = calldata->clp;
5519
5520 if (atomic_read(&clp->cl_count) > 1)
5521 nfs4_schedule_state_renewal(clp);
5522 nfs_put_client(clp);
5523 kfree(calldata);
5524}
5525
5526static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5527{
5528 switch(task->tk_status) {
5529 case -NFS4ERR_DELAY:
5530 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5531 return -EAGAIN;
5532 default:
5533 nfs4_schedule_lease_recovery(clp);
5534 }
5535 return 0;
5536}
5537
5538static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5539{
5540 struct nfs4_sequence_data *calldata = data;
5541 struct nfs_client *clp = calldata->clp;
5542
5543 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5544 return;
5545
5546 if (task->tk_status < 0) {
5547 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5548 if (atomic_read(&clp->cl_count) == 1)
5549 goto out;
5550
5551 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5552 rpc_restart_call_prepare(task);
5553 return;
5554 }
5555 }
5556 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5557out:
5558 dprintk("<-- %s\n", __func__);
5559}
5560
5561static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5562{
5563 struct nfs4_sequence_data *calldata = data;
5564 struct nfs_client *clp = calldata->clp;
5565 struct nfs4_sequence_args *args;
5566 struct nfs4_sequence_res *res;
5567
5568 args = task->tk_msg.rpc_argp;
5569 res = task->tk_msg.rpc_resp;
5570
5571 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5572 return;
5573 rpc_call_start(task);
5574}
5575
5576static const struct rpc_call_ops nfs41_sequence_ops = {
5577 .rpc_call_done = nfs41_sequence_call_done,
5578 .rpc_call_prepare = nfs41_sequence_prepare,
5579 .rpc_release = nfs41_sequence_release,
5580};
5581
5582static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5583{
5584 struct nfs4_sequence_data *calldata;
5585 struct rpc_message msg = {
5586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5587 .rpc_cred = cred,
5588 };
5589 struct rpc_task_setup task_setup_data = {
5590 .rpc_client = clp->cl_rpcclient,
5591 .rpc_message = &msg,
5592 .callback_ops = &nfs41_sequence_ops,
5593 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5594 };
5595
5596 if (!atomic_inc_not_zero(&clp->cl_count))
5597 return ERR_PTR(-EIO);
5598 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5599 if (calldata == NULL) {
5600 nfs_put_client(clp);
5601 return ERR_PTR(-ENOMEM);
5602 }
5603 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5604 msg.rpc_argp = &calldata->args;
5605 msg.rpc_resp = &calldata->res;
5606 calldata->clp = clp;
5607 task_setup_data.callback_data = calldata;
5608
5609 return rpc_run_task(&task_setup_data);
5610}
5611
5612static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5613{
5614 struct rpc_task *task;
5615 int ret = 0;
5616
5617 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5618 return 0;
5619 task = _nfs41_proc_sequence(clp, cred);
5620 if (IS_ERR(task))
5621 ret = PTR_ERR(task);
5622 else
5623 rpc_put_task_async(task);
5624 dprintk("<-- %s status=%d\n", __func__, ret);
5625 return ret;
5626}
5627
5628static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5629{
5630 struct rpc_task *task;
5631 int ret;
5632
5633 task = _nfs41_proc_sequence(clp, cred);
5634 if (IS_ERR(task)) {
5635 ret = PTR_ERR(task);
5636 goto out;
5637 }
5638 ret = rpc_wait_for_completion_task(task);
5639 if (!ret) {
5640 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5641
5642 if (task->tk_status == 0)
5643 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5644 ret = task->tk_status;
5645 }
5646 rpc_put_task(task);
5647out:
5648 dprintk("<-- %s status=%d\n", __func__, ret);
5649 return ret;
5650}
5651
5652struct nfs4_reclaim_complete_data {
5653 struct nfs_client *clp;
5654 struct nfs41_reclaim_complete_args arg;
5655 struct nfs41_reclaim_complete_res res;
5656};
5657
5658static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5659{
5660 struct nfs4_reclaim_complete_data *calldata = data;
5661
5662 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5663 if (nfs41_setup_sequence(calldata->clp->cl_session,
5664 &calldata->arg.seq_args,
5665 &calldata->res.seq_res, task))
5666 return;
5667
5668 rpc_call_start(task);
5669}
5670
5671static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5672{
5673 switch(task->tk_status) {
5674 case 0:
5675 case -NFS4ERR_COMPLETE_ALREADY:
5676 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5677 break;
5678 case -NFS4ERR_DELAY:
5679 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5680 /* fall through */
5681 case -NFS4ERR_RETRY_UNCACHED_REP:
5682 return -EAGAIN;
5683 default:
5684 nfs4_schedule_lease_recovery(clp);
5685 }
5686 return 0;
5687}
5688
5689static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5690{
5691 struct nfs4_reclaim_complete_data *calldata = data;
5692 struct nfs_client *clp = calldata->clp;
5693 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5694
5695 dprintk("--> %s\n", __func__);
5696 if (!nfs41_sequence_done(task, res))
5697 return;
5698
5699 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5700 rpc_restart_call_prepare(task);
5701 return;
5702 }
5703 dprintk("<-- %s\n", __func__);
5704}
5705
5706static void nfs4_free_reclaim_complete_data(void *data)
5707{
5708 struct nfs4_reclaim_complete_data *calldata = data;
5709
5710 kfree(calldata);
5711}
5712
5713static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5714 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5715 .rpc_call_done = nfs4_reclaim_complete_done,
5716 .rpc_release = nfs4_free_reclaim_complete_data,
5717};
5718
5719/*
5720 * Issue a global reclaim complete.
5721 */
5722static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5723{
5724 struct nfs4_reclaim_complete_data *calldata;
5725 struct rpc_task *task;
5726 struct rpc_message msg = {
5727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5728 };
5729 struct rpc_task_setup task_setup_data = {
5730 .rpc_client = clp->cl_rpcclient,
5731 .rpc_message = &msg,
5732 .callback_ops = &nfs4_reclaim_complete_call_ops,
5733 .flags = RPC_TASK_ASYNC,
5734 };
5735 int status = -ENOMEM;
5736
5737 dprintk("--> %s\n", __func__);
5738 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5739 if (calldata == NULL)
5740 goto out;
5741 calldata->clp = clp;
5742 calldata->arg.one_fs = 0;
5743
5744 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5745 msg.rpc_argp = &calldata->arg;
5746 msg.rpc_resp = &calldata->res;
5747 task_setup_data.callback_data = calldata;
5748 task = rpc_run_task(&task_setup_data);
5749 if (IS_ERR(task)) {
5750 status = PTR_ERR(task);
5751 goto out;
5752 }
5753 status = nfs4_wait_for_completion_rpc_task(task);
5754 if (status == 0)
5755 status = task->tk_status;
5756 rpc_put_task(task);
5757 return 0;
5758out:
5759 dprintk("<-- %s status=%d\n", __func__, status);
5760 return status;
5761}
5762
5763static void
5764nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5765{
5766 struct nfs4_layoutget *lgp = calldata;
5767 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5768
5769 dprintk("--> %s\n", __func__);
5770 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5771 * right now covering the LAYOUTGET we are about to send.
5772 * However, that is not so catastrophic, and there seems
5773 * to be no way to prevent it completely.
5774 */
5775 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5776 &lgp->res.seq_res, task))
5777 return;
5778 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5779 NFS_I(lgp->args.inode)->layout,
5780 lgp->args.ctx->state)) {
5781 rpc_exit(task, NFS4_OK);
5782 return;
5783 }
5784 rpc_call_start(task);
5785}
5786
5787static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5788{
5789 struct nfs4_layoutget *lgp = calldata;
5790 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5791
5792 dprintk("--> %s\n", __func__);
5793
5794 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5795 return;
5796
5797 switch (task->tk_status) {
5798 case 0:
5799 break;
5800 case -NFS4ERR_LAYOUTTRYLATER:
5801 case -NFS4ERR_RECALLCONFLICT:
5802 task->tk_status = -NFS4ERR_DELAY;
5803 /* Fall through */
5804 default:
5805 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5806 rpc_restart_call_prepare(task);
5807 return;
5808 }
5809 }
5810 dprintk("<-- %s\n", __func__);
5811}
5812
5813static void nfs4_layoutget_release(void *calldata)
5814{
5815 struct nfs4_layoutget *lgp = calldata;
5816
5817 dprintk("--> %s\n", __func__);
5818 put_nfs_open_context(lgp->args.ctx);
5819 kfree(calldata);
5820 dprintk("<-- %s\n", __func__);
5821}
5822
5823static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5824 .rpc_call_prepare = nfs4_layoutget_prepare,
5825 .rpc_call_done = nfs4_layoutget_done,
5826 .rpc_release = nfs4_layoutget_release,
5827};
5828
5829int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5830{
5831 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5832 struct rpc_task *task;
5833 struct rpc_message msg = {
5834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5835 .rpc_argp = &lgp->args,
5836 .rpc_resp = &lgp->res,
5837 };
5838 struct rpc_task_setup task_setup_data = {
5839 .rpc_client = server->client,
5840 .rpc_message = &msg,
5841 .callback_ops = &nfs4_layoutget_call_ops,
5842 .callback_data = lgp,
5843 .flags = RPC_TASK_ASYNC,
5844 };
5845 int status = 0;
5846
5847 dprintk("--> %s\n", __func__);
5848
5849 lgp->res.layoutp = &lgp->args.layout;
5850 lgp->res.seq_res.sr_slot = NULL;
5851 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5852 task = rpc_run_task(&task_setup_data);
5853 if (IS_ERR(task))
5854 return PTR_ERR(task);
5855 status = nfs4_wait_for_completion_rpc_task(task);
5856 if (status == 0)
5857 status = task->tk_status;
5858 if (status == 0)
5859 status = pnfs_layout_process(lgp);
5860 rpc_put_task(task);
5861 dprintk("<-- %s status=%d\n", __func__, status);
5862 return status;
5863}
5864
5865static void
5866nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5867{
5868 struct nfs4_layoutreturn *lrp = calldata;
5869
5870 dprintk("--> %s\n", __func__);
5871 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5872 &lrp->res.seq_res, task))
5873 return;
5874 rpc_call_start(task);
5875}
5876
5877static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5878{
5879 struct nfs4_layoutreturn *lrp = calldata;
5880 struct nfs_server *server;
5881 struct pnfs_layout_hdr *lo = lrp->args.layout;
5882
5883 dprintk("--> %s\n", __func__);
5884
5885 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5886 return;
5887
5888 server = NFS_SERVER(lrp->args.inode);
5889 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5890 rpc_restart_call_prepare(task);
5891 return;
5892 }
5893 spin_lock(&lo->plh_inode->i_lock);
5894 if (task->tk_status == 0) {
5895 if (lrp->res.lrs_present) {
5896 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5897 } else
5898 BUG_ON(!list_empty(&lo->plh_segs));
5899 }
5900 lo->plh_block_lgets--;
5901 spin_unlock(&lo->plh_inode->i_lock);
5902 dprintk("<-- %s\n", __func__);
5903}
5904
5905static void nfs4_layoutreturn_release(void *calldata)
5906{
5907 struct nfs4_layoutreturn *lrp = calldata;
5908
5909 dprintk("--> %s\n", __func__);
5910 put_layout_hdr(lrp->args.layout);
5911 kfree(calldata);
5912 dprintk("<-- %s\n", __func__);
5913}
5914
5915static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5916 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5917 .rpc_call_done = nfs4_layoutreturn_done,
5918 .rpc_release = nfs4_layoutreturn_release,
5919};
5920
5921int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5922{
5923 struct rpc_task *task;
5924 struct rpc_message msg = {
5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5926 .rpc_argp = &lrp->args,
5927 .rpc_resp = &lrp->res,
5928 };
5929 struct rpc_task_setup task_setup_data = {
5930 .rpc_client = lrp->clp->cl_rpcclient,
5931 .rpc_message = &msg,
5932 .callback_ops = &nfs4_layoutreturn_call_ops,
5933 .callback_data = lrp,
5934 };
5935 int status;
5936
5937 dprintk("--> %s\n", __func__);
5938 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5939 task = rpc_run_task(&task_setup_data);
5940 if (IS_ERR(task))
5941 return PTR_ERR(task);
5942 status = task->tk_status;
5943 dprintk("<-- %s status=%d\n", __func__, status);
5944 rpc_put_task(task);
5945 return status;
5946}
5947
5948/*
5949 * Retrieve the list of Data Server devices from the MDS.
5950 */
5951static int _nfs4_getdevicelist(struct nfs_server *server,
5952 const struct nfs_fh *fh,
5953 struct pnfs_devicelist *devlist)
5954{
5955 struct nfs4_getdevicelist_args args = {
5956 .fh = fh,
5957 .layoutclass = server->pnfs_curr_ld->id,
5958 };
5959 struct nfs4_getdevicelist_res res = {
5960 .devlist = devlist,
5961 };
5962 struct rpc_message msg = {
5963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5964 .rpc_argp = &args,
5965 .rpc_resp = &res,
5966 };
5967 int status;
5968
5969 dprintk("--> %s\n", __func__);
5970 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5971 &res.seq_res, 0);
5972 dprintk("<-- %s status=%d\n", __func__, status);
5973 return status;
5974}
5975
5976int nfs4_proc_getdevicelist(struct nfs_server *server,
5977 const struct nfs_fh *fh,
5978 struct pnfs_devicelist *devlist)
5979{
5980 struct nfs4_exception exception = { };
5981 int err;
5982
5983 do {
5984 err = nfs4_handle_exception(server,
5985 _nfs4_getdevicelist(server, fh, devlist),
5986 &exception);
5987 } while (exception.retry);
5988
5989 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5990 err, devlist->num_devs);
5991
5992 return err;
5993}
5994EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5995
5996static int
5997_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5998{
5999 struct nfs4_getdeviceinfo_args args = {
6000 .pdev = pdev,
6001 };
6002 struct nfs4_getdeviceinfo_res res = {
6003 .pdev = pdev,
6004 };
6005 struct rpc_message msg = {
6006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6007 .rpc_argp = &args,
6008 .rpc_resp = &res,
6009 };
6010 int status;
6011
6012 dprintk("--> %s\n", __func__);
6013 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6014 dprintk("<-- %s status=%d\n", __func__, status);
6015
6016 return status;
6017}
6018
6019int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6020{
6021 struct nfs4_exception exception = { };
6022 int err;
6023
6024 do {
6025 err = nfs4_handle_exception(server,
6026 _nfs4_proc_getdeviceinfo(server, pdev),
6027 &exception);
6028 } while (exception.retry);
6029 return err;
6030}
6031EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6032
6033static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6034{
6035 struct nfs4_layoutcommit_data *data = calldata;
6036 struct nfs_server *server = NFS_SERVER(data->args.inode);
6037
6038 if (nfs4_setup_sequence(server, &data->args.seq_args,
6039 &data->res.seq_res, task))
6040 return;
6041 rpc_call_start(task);
6042}
6043
6044static void
6045nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6046{
6047 struct nfs4_layoutcommit_data *data = calldata;
6048 struct nfs_server *server = NFS_SERVER(data->args.inode);
6049
6050 if (!nfs4_sequence_done(task, &data->res.seq_res))
6051 return;
6052
6053 switch (task->tk_status) { /* Just ignore these failures */
6054 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6055 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6056 case NFS4ERR_BADLAYOUT: /* no layout */
6057 case NFS4ERR_GRACE: /* loca_recalim always false */
6058 task->tk_status = 0;
6059 }
6060
6061 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6062 rpc_restart_call_prepare(task);
6063 return;
6064 }
6065
6066 if (task->tk_status == 0)
6067 nfs_post_op_update_inode_force_wcc(data->args.inode,
6068 data->res.fattr);
6069}
6070
6071static void nfs4_layoutcommit_release(void *calldata)
6072{
6073 struct nfs4_layoutcommit_data *data = calldata;
6074 struct pnfs_layout_segment *lseg, *tmp;
6075 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6076
6077 pnfs_cleanup_layoutcommit(data);
6078 /* Matched by references in pnfs_set_layoutcommit */
6079 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6080 list_del_init(&lseg->pls_lc_list);
6081 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6082 &lseg->pls_flags))
6083 put_lseg(lseg);
6084 }
6085
6086 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6087 smp_mb__after_clear_bit();
6088 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6089
6090 put_rpccred(data->cred);
6091 kfree(data);
6092}
6093
6094static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6095 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6096 .rpc_call_done = nfs4_layoutcommit_done,
6097 .rpc_release = nfs4_layoutcommit_release,
6098};
6099
6100int
6101nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6102{
6103 struct rpc_message msg = {
6104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6105 .rpc_argp = &data->args,
6106 .rpc_resp = &data->res,
6107 .rpc_cred = data->cred,
6108 };
6109 struct rpc_task_setup task_setup_data = {
6110 .task = &data->task,
6111 .rpc_client = NFS_CLIENT(data->args.inode),
6112 .rpc_message = &msg,
6113 .callback_ops = &nfs4_layoutcommit_ops,
6114 .callback_data = data,
6115 .flags = RPC_TASK_ASYNC,
6116 };
6117 struct rpc_task *task;
6118 int status = 0;
6119
6120 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6121 "lbw: %llu inode %lu\n",
6122 data->task.tk_pid, sync,
6123 data->args.lastbytewritten,
6124 data->args.inode->i_ino);
6125
6126 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6127 task = rpc_run_task(&task_setup_data);
6128 if (IS_ERR(task))
6129 return PTR_ERR(task);
6130 if (sync == false)
6131 goto out;
6132 status = nfs4_wait_for_completion_rpc_task(task);
6133 if (status != 0)
6134 goto out;
6135 status = task->tk_status;
6136out:
6137 dprintk("%s: status %d\n", __func__, status);
6138 rpc_put_task(task);
6139 return status;
6140}
6141
6142static int
6143_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6144 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6145{
6146 struct nfs41_secinfo_no_name_args args = {
6147 .style = SECINFO_STYLE_CURRENT_FH,
6148 };
6149 struct nfs4_secinfo_res res = {
6150 .flavors = flavors,
6151 };
6152 struct rpc_message msg = {
6153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6154 .rpc_argp = &args,
6155 .rpc_resp = &res,
6156 };
6157 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6158}
6159
6160static int
6161nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6162 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6163{
6164 struct nfs4_exception exception = { };
6165 int err;
6166 do {
6167 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6168 switch (err) {
6169 case 0:
6170 case -NFS4ERR_WRONGSEC:
6171 case -NFS4ERR_NOTSUPP:
6172 break;
6173 default:
6174 err = nfs4_handle_exception(server, err, &exception);
6175 }
6176 } while (exception.retry);
6177 return err;
6178}
6179
6180static int
6181nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6182 struct nfs_fsinfo *info)
6183{
6184 int err;
6185 struct page *page;
6186 rpc_authflavor_t flavor;
6187 struct nfs4_secinfo_flavors *flavors;
6188
6189 page = alloc_page(GFP_KERNEL);
6190 if (!page) {
6191 err = -ENOMEM;
6192 goto out;
6193 }
6194
6195 flavors = page_address(page);
6196 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6197
6198 /*
6199 * Fall back on "guess and check" method if
6200 * the server doesn't support SECINFO_NO_NAME
6201 */
6202 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6203 err = nfs4_find_root_sec(server, fhandle, info);
6204 goto out_freepage;
6205 }
6206 if (err)
6207 goto out_freepage;
6208
6209 flavor = nfs_find_best_sec(flavors);
6210 if (err == 0)
6211 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6212
6213out_freepage:
6214 put_page(page);
6215 if (err == -EACCES)
6216 return -EPERM;
6217out:
6218 return err;
6219}
6220
6221static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6222{
6223 int status;
6224 struct nfs41_test_stateid_args args = {
6225 .stateid = stateid,
6226 };
6227 struct nfs41_test_stateid_res res;
6228 struct rpc_message msg = {
6229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6230 .rpc_argp = &args,
6231 .rpc_resp = &res,
6232 };
6233
6234 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6235 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6236
6237 if (status == NFS_OK)
6238 return res.status;
6239 return status;
6240}
6241
6242static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6243{
6244 struct nfs4_exception exception = { };
6245 int err;
6246 do {
6247 err = nfs4_handle_exception(server,
6248 _nfs41_test_stateid(server, stateid),
6249 &exception);
6250 } while (exception.retry);
6251 return err;
6252}
6253
6254static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6255{
6256 struct nfs41_free_stateid_args args = {
6257 .stateid = stateid,
6258 };
6259 struct nfs41_free_stateid_res res;
6260 struct rpc_message msg = {
6261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6262 .rpc_argp = &args,
6263 .rpc_resp = &res,
6264 };
6265
6266 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6267 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6268}
6269
6270static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6271{
6272 struct nfs4_exception exception = { };
6273 int err;
6274 do {
6275 err = nfs4_handle_exception(server,
6276 _nfs4_free_stateid(server, stateid),
6277 &exception);
6278 } while (exception.retry);
6279 return err;
6280}
6281#endif /* CONFIG_NFS_V4_1 */
6282
6283struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6284 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6285 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6286 .recover_open = nfs4_open_reclaim,
6287 .recover_lock = nfs4_lock_reclaim,
6288 .establish_clid = nfs4_init_clientid,
6289 .get_clid_cred = nfs4_get_setclientid_cred,
6290};
6291
6292#if defined(CONFIG_NFS_V4_1)
6293struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6294 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6295 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6296 .recover_open = nfs4_open_reclaim,
6297 .recover_lock = nfs4_lock_reclaim,
6298 .establish_clid = nfs41_init_clientid,
6299 .get_clid_cred = nfs4_get_exchange_id_cred,
6300 .reclaim_complete = nfs41_proc_reclaim_complete,
6301};
6302#endif /* CONFIG_NFS_V4_1 */
6303
6304struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6305 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6306 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6307 .recover_open = nfs4_open_expired,
6308 .recover_lock = nfs4_lock_expired,
6309 .establish_clid = nfs4_init_clientid,
6310 .get_clid_cred = nfs4_get_setclientid_cred,
6311};
6312
6313#if defined(CONFIG_NFS_V4_1)
6314struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6315 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6316 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6317 .recover_open = nfs41_open_expired,
6318 .recover_lock = nfs41_lock_expired,
6319 .establish_clid = nfs41_init_clientid,
6320 .get_clid_cred = nfs4_get_exchange_id_cred,
6321};
6322#endif /* CONFIG_NFS_V4_1 */
6323
6324struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6325 .sched_state_renewal = nfs4_proc_async_renew,
6326 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6327 .renew_lease = nfs4_proc_renew,
6328};
6329
6330#if defined(CONFIG_NFS_V4_1)
6331struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6332 .sched_state_renewal = nfs41_proc_async_sequence,
6333 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6334 .renew_lease = nfs4_proc_sequence,
6335};
6336#endif
6337
6338static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6339 .minor_version = 0,
6340 .call_sync = _nfs4_call_sync,
6341 .validate_stateid = nfs4_validate_delegation_stateid,
6342 .find_root_sec = nfs4_find_root_sec,
6343 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6344 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6345 .state_renewal_ops = &nfs40_state_renewal_ops,
6346};
6347
6348#if defined(CONFIG_NFS_V4_1)
6349static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6350 .minor_version = 1,
6351 .call_sync = _nfs4_call_sync_session,
6352 .validate_stateid = nfs41_validate_delegation_stateid,
6353 .find_root_sec = nfs41_find_root_sec,
6354 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6355 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6356 .state_renewal_ops = &nfs41_state_renewal_ops,
6357};
6358#endif
6359
6360const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6361 [0] = &nfs_v4_0_minor_ops,
6362#if defined(CONFIG_NFS_V4_1)
6363 [1] = &nfs_v4_1_minor_ops,
6364#endif
6365};
6366
6367static const struct inode_operations nfs4_file_inode_operations = {
6368 .permission = nfs_permission,
6369 .getattr = nfs_getattr,
6370 .setattr = nfs_setattr,
6371 .getxattr = generic_getxattr,
6372 .setxattr = generic_setxattr,
6373 .listxattr = generic_listxattr,
6374 .removexattr = generic_removexattr,
6375};
6376
6377const struct nfs_rpc_ops nfs_v4_clientops = {
6378 .version = 4, /* protocol version */
6379 .dentry_ops = &nfs4_dentry_operations,
6380 .dir_inode_ops = &nfs4_dir_inode_operations,
6381 .file_inode_ops = &nfs4_file_inode_operations,
6382 .file_ops = &nfs4_file_operations,
6383 .getroot = nfs4_proc_get_root,
6384 .getattr = nfs4_proc_getattr,
6385 .setattr = nfs4_proc_setattr,
6386 .lookup = nfs4_proc_lookup,
6387 .access = nfs4_proc_access,
6388 .readlink = nfs4_proc_readlink,
6389 .create = nfs4_proc_create,
6390 .remove = nfs4_proc_remove,
6391 .unlink_setup = nfs4_proc_unlink_setup,
6392 .unlink_done = nfs4_proc_unlink_done,
6393 .rename = nfs4_proc_rename,
6394 .rename_setup = nfs4_proc_rename_setup,
6395 .rename_done = nfs4_proc_rename_done,
6396 .link = nfs4_proc_link,
6397 .symlink = nfs4_proc_symlink,
6398 .mkdir = nfs4_proc_mkdir,
6399 .rmdir = nfs4_proc_remove,
6400 .readdir = nfs4_proc_readdir,
6401 .mknod = nfs4_proc_mknod,
6402 .statfs = nfs4_proc_statfs,
6403 .fsinfo = nfs4_proc_fsinfo,
6404 .pathconf = nfs4_proc_pathconf,
6405 .set_capabilities = nfs4_server_capabilities,
6406 .decode_dirent = nfs4_decode_dirent,
6407 .read_setup = nfs4_proc_read_setup,
6408 .read_done = nfs4_read_done,
6409 .write_setup = nfs4_proc_write_setup,
6410 .write_done = nfs4_write_done,
6411 .commit_setup = nfs4_proc_commit_setup,
6412 .commit_done = nfs4_commit_done,
6413 .lock = nfs4_proc_lock,
6414 .clear_acl_cache = nfs4_zap_acl_attr,
6415 .close_context = nfs4_close_context,
6416 .open_context = nfs4_atomic_open,
6417 .init_client = nfs4_init_client,
6418 .secinfo = nfs4_proc_secinfo,
6419};
6420
6421static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6422 .prefix = XATTR_NAME_NFSV4_ACL,
6423 .list = nfs4_xattr_list_nfs4_acl,
6424 .get = nfs4_xattr_get_nfs4_acl,
6425 .set = nfs4_xattr_set_nfs4_acl,
6426};
6427
6428const struct xattr_handler *nfs4_xattr_handlers[] = {
6429 &nfs4_xattr_nfs4_acl_handler,
6430 NULL
6431};
6432
6433module_param(max_session_slots, ushort, 0644);
6434MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6435 "requests the client will negotiate");
6436
6437/*
6438 * Local variables:
6439 * c-basic-offset: 8
6440 * End:
6441 */
Linux 6.x block layer and io_uring tree(s)