4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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>
62 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
81 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
82 struct nfs_fattr *fattr, struct iattr *sattr,
83 struct nfs4_state *state);
84 #ifdef CONFIG_NFS_V4_1
85 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
86 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
88 /* Prevent leaks of NFSv4 errors into userland */
89 static int nfs4_map_errors(int err)
94 case -NFS4ERR_RESOURCE:
96 case -NFS4ERR_WRONGSEC:
98 case -NFS4ERR_BADOWNER:
99 case -NFS4ERR_BADNAME:
102 dprintk("%s could not handle NFSv4 error %d\n",
110 * This is our standard bitmap for GETATTR requests.
112 const u32 nfs4_fattr_bitmap[2] = {
114 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_FILEID,
119 | FATTR4_WORD1_NUMLINKS
121 | FATTR4_WORD1_OWNER_GROUP
122 | FATTR4_WORD1_RAWDEV
123 | FATTR4_WORD1_SPACE_USED
124 | FATTR4_WORD1_TIME_ACCESS
125 | FATTR4_WORD1_TIME_METADATA
126 | FATTR4_WORD1_TIME_MODIFY
129 const u32 nfs4_statfs_bitmap[2] = {
130 FATTR4_WORD0_FILES_AVAIL
131 | FATTR4_WORD0_FILES_FREE
132 | FATTR4_WORD0_FILES_TOTAL,
133 FATTR4_WORD1_SPACE_AVAIL
134 | FATTR4_WORD1_SPACE_FREE
135 | FATTR4_WORD1_SPACE_TOTAL
138 const u32 nfs4_pathconf_bitmap[2] = {
140 | FATTR4_WORD0_MAXNAME,
144 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
145 | FATTR4_WORD0_MAXREAD
146 | FATTR4_WORD0_MAXWRITE
147 | FATTR4_WORD0_LEASE_TIME,
148 FATTR4_WORD1_TIME_DELTA
149 | FATTR4_WORD1_FS_LAYOUT_TYPES,
150 FATTR4_WORD2_LAYOUT_BLKSIZE
153 const u32 nfs4_fs_locations_bitmap[2] = {
155 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID
159 | FATTR4_WORD0_FS_LOCATIONS,
161 | FATTR4_WORD1_NUMLINKS
163 | FATTR4_WORD1_OWNER_GROUP
164 | FATTR4_WORD1_RAWDEV
165 | FATTR4_WORD1_SPACE_USED
166 | FATTR4_WORD1_TIME_ACCESS
167 | FATTR4_WORD1_TIME_METADATA
168 | FATTR4_WORD1_TIME_MODIFY
169 | FATTR4_WORD1_MOUNTED_ON_FILEID
172 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
173 struct nfs4_readdir_arg *readdir)
177 BUG_ON(readdir->count < 80);
179 readdir->cookie = cookie;
180 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
185 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
190 * NFSv4 servers do not return entries for '.' and '..'
191 * Therefore, we fake these entries here. We let '.'
192 * have cookie 0 and '..' have cookie 1. Note that
193 * when talking to the server, we always send cookie 0
196 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199 *p++ = xdr_one; /* next */
200 *p++ = xdr_zero; /* cookie, first word */
201 *p++ = xdr_one; /* cookie, second word */
202 *p++ = xdr_one; /* entry len */
203 memcpy(p, ".\0\0\0", 4); /* entry */
205 *p++ = xdr_one; /* bitmap length */
206 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
207 *p++ = htonl(8); /* attribute buffer length */
208 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 *p++ = xdr_one; /* next */
212 *p++ = xdr_zero; /* cookie, first word */
213 *p++ = xdr_two; /* cookie, second word */
214 *p++ = xdr_two; /* entry len */
215 memcpy(p, "..\0\0", 4); /* entry */
217 *p++ = xdr_one; /* bitmap length */
218 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
219 *p++ = htonl(8); /* attribute buffer length */
220 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
222 readdir->pgbase = (char *)p - (char *)start;
223 readdir->count -= readdir->pgbase;
224 kunmap_atomic(start, KM_USER0);
227 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
233 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
234 nfs_wait_bit_killable, TASK_KILLABLE);
238 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
245 *timeout = NFS4_POLL_RETRY_MIN;
246 if (*timeout > NFS4_POLL_RETRY_MAX)
247 *timeout = NFS4_POLL_RETRY_MAX;
248 freezable_schedule_timeout_killable(*timeout);
249 if (fatal_signal_pending(current))
255 /* This is the error handling routine for processes that are allowed
258 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
260 struct nfs_client *clp = server->nfs_client;
261 struct nfs4_state *state = exception->state;
264 exception->retry = 0;
268 case -NFS4ERR_ADMIN_REVOKED:
269 case -NFS4ERR_BAD_STATEID:
270 case -NFS4ERR_OPENMODE:
273 nfs4_schedule_stateid_recovery(server, state);
274 goto wait_on_recovery;
275 case -NFS4ERR_EXPIRED:
277 nfs4_schedule_stateid_recovery(server, state);
278 case -NFS4ERR_STALE_STATEID:
279 case -NFS4ERR_STALE_CLIENTID:
280 nfs4_schedule_lease_recovery(clp);
281 goto wait_on_recovery;
282 #if defined(CONFIG_NFS_V4_1)
283 case -NFS4ERR_BADSESSION:
284 case -NFS4ERR_BADSLOT:
285 case -NFS4ERR_BAD_HIGH_SLOT:
286 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
287 case -NFS4ERR_DEADSESSION:
288 case -NFS4ERR_SEQ_FALSE_RETRY:
289 case -NFS4ERR_SEQ_MISORDERED:
290 dprintk("%s ERROR: %d Reset session\n", __func__,
292 nfs4_schedule_session_recovery(clp->cl_session);
293 exception->retry = 1;
295 #endif /* defined(CONFIG_NFS_V4_1) */
296 case -NFS4ERR_FILE_OPEN:
297 if (exception->timeout > HZ) {
298 /* We have retried a decent amount, time to
307 ret = nfs4_delay(server->client, &exception->timeout);
310 case -NFS4ERR_RETRY_UNCACHED_REP:
311 case -NFS4ERR_OLD_STATEID:
312 exception->retry = 1;
314 case -NFS4ERR_BADOWNER:
315 /* The following works around a Linux server bug! */
316 case -NFS4ERR_BADNAME:
317 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
318 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
319 exception->retry = 1;
320 printk(KERN_WARNING "NFS: v4 server %s "
321 "does not accept raw "
323 "Reenabling the idmapper.\n",
324 server->nfs_client->cl_hostname);
327 /* We failed to handle the error */
328 return nfs4_map_errors(ret);
330 ret = nfs4_wait_clnt_recover(clp);
332 exception->retry = 1;
337 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
339 spin_lock(&clp->cl_lock);
340 if (time_before(clp->cl_last_renewal,timestamp))
341 clp->cl_last_renewal = timestamp;
342 spin_unlock(&clp->cl_lock);
345 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
347 do_renew_lease(server->nfs_client, timestamp);
350 #if defined(CONFIG_NFS_V4_1)
353 * nfs4_free_slot - free a slot and efficiently update slot table.
355 * freeing a slot is trivially done by clearing its respective bit
357 * If the freed slotid equals highest_used_slotid we want to update it
358 * so that the server would be able to size down the slot table if needed,
359 * otherwise we know that the highest_used_slotid is still in use.
360 * When updating highest_used_slotid there may be "holes" in the bitmap
361 * so we need to scan down from highest_used_slotid to 0 looking for the now
362 * highest slotid in use.
363 * If none found, highest_used_slotid is set to -1.
365 * Must be called while holding tbl->slot_tbl_lock
368 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
370 int slotid = free_slotid;
372 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
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;
382 tbl->highest_used_slotid = -1;
384 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
385 free_slotid, tbl->highest_used_slotid);
389 * Signal state manager thread if session fore channel is drained
391 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
393 struct rpc_task *task;
395 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
396 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
398 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
402 if (ses->fc_slot_table.highest_used_slotid != -1)
405 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
406 complete(&ses->fc_slot_table.complete);
410 * Signal state manager thread if session back channel is drained
412 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
414 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
415 ses->bc_slot_table.highest_used_slotid != -1)
417 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
418 complete(&ses->bc_slot_table.complete);
421 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
423 struct nfs4_slot_table *tbl;
425 tbl = &res->sr_session->fc_slot_table;
427 /* just wake up the next guy waiting since
428 * we may have not consumed a slot after all */
429 dprintk("%s: No slot\n", __func__);
433 spin_lock(&tbl->slot_tbl_lock);
434 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
435 nfs4_check_drain_fc_complete(res->sr_session);
436 spin_unlock(&tbl->slot_tbl_lock);
440 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
442 unsigned long timestamp;
443 struct nfs_client *clp;
446 * sr_status remains 1 if an RPC level error occurred. The server
447 * may or may not have processed the sequence operation..
448 * Proceed as if the server received and processed the sequence
451 if (res->sr_status == 1)
452 res->sr_status = NFS_OK;
454 /* don't increment the sequence number if the task wasn't sent */
455 if (!RPC_WAS_SENT(task))
458 /* Check the SEQUENCE operation status */
459 switch (res->sr_status) {
461 /* Update the slot's sequence and clientid lease timer */
462 ++res->sr_slot->seq_nr;
463 timestamp = res->sr_renewal_time;
464 clp = res->sr_session->clp;
465 do_renew_lease(clp, timestamp);
466 /* Check sequence flags */
467 if (res->sr_status_flags != 0)
468 nfs4_schedule_lease_recovery(clp);
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
475 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
477 res->sr_slot - res->sr_session->fc_slot_table.slots,
478 res->sr_slot->seq_nr);
481 /* Just update the slot sequence no. */
482 ++res->sr_slot->seq_nr;
485 /* The session may be reset by one of the error handlers. */
486 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
487 nfs41_sequence_free_slot(res);
490 if (!rpc_restart_call(task))
492 rpc_delay(task, NFS4_POLL_RETRY_MAX);
496 static int nfs4_sequence_done(struct rpc_task *task,
497 struct nfs4_sequence_res *res)
499 if (res->sr_session == NULL)
501 return nfs41_sequence_done(task, res);
505 * nfs4_find_slot - efficiently look for a free slot
507 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
508 * If found, we mark the slot as used, update the highest_used_slotid,
509 * and respectively set up the sequence operation args.
510 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
512 * Note: must be called with under the slot_tbl_lock.
515 nfs4_find_slot(struct nfs4_slot_table *tbl)
518 u8 ret_id = NFS4_MAX_SLOT_TABLE;
519 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
521 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
522 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
524 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
525 if (slotid >= tbl->max_slots)
527 __set_bit(slotid, tbl->used_slots);
528 if (slotid > tbl->highest_used_slotid)
529 tbl->highest_used_slotid = slotid;
532 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
533 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
537 int nfs41_setup_sequence(struct nfs4_session *session,
538 struct nfs4_sequence_args *args,
539 struct nfs4_sequence_res *res,
541 struct rpc_task *task)
543 struct nfs4_slot *slot;
544 struct nfs4_slot_table *tbl;
547 dprintk("--> %s\n", __func__);
548 /* slot already allocated? */
549 if (res->sr_slot != NULL)
552 tbl = &session->fc_slot_table;
554 spin_lock(&tbl->slot_tbl_lock);
555 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
556 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
557 /* The state manager will wait until the slot table is empty */
558 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
559 spin_unlock(&tbl->slot_tbl_lock);
560 dprintk("%s session is draining\n", __func__);
564 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
565 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
566 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
567 spin_unlock(&tbl->slot_tbl_lock);
568 dprintk("%s enforce FIFO order\n", __func__);
572 slotid = nfs4_find_slot(tbl);
573 if (slotid == NFS4_MAX_SLOT_TABLE) {
574 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
575 spin_unlock(&tbl->slot_tbl_lock);
576 dprintk("<-- %s: no free slots\n", __func__);
579 spin_unlock(&tbl->slot_tbl_lock);
581 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
582 slot = tbl->slots + slotid;
583 args->sa_session = session;
584 args->sa_slotid = slotid;
585 args->sa_cache_this = cache_reply;
587 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
589 res->sr_session = session;
591 res->sr_renewal_time = jiffies;
592 res->sr_status_flags = 0;
594 * sr_status is only set in decode_sequence, and so will remain
595 * set to 1 if an rpc level failure occurs.
600 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
602 int nfs4_setup_sequence(const struct nfs_server *server,
603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
606 struct rpc_task *task)
608 struct nfs4_session *session = nfs4_get_session(server);
611 if (session == NULL) {
612 args->sa_session = NULL;
613 res->sr_session = NULL;
617 dprintk("--> %s clp %p session %p sr_slot %td\n",
618 __func__, session->clp, session, res->sr_slot ?
619 res->sr_slot - session->fc_slot_table.slots : -1);
621 ret = nfs41_setup_sequence(session, args, res, cache_reply,
624 dprintk("<-- %s status=%d\n", __func__, ret);
628 struct nfs41_call_sync_data {
629 const struct nfs_server *seq_server;
630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
635 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
637 struct nfs41_call_sync_data *data = calldata;
639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
641 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
642 data->seq_res, data->cache_reply, task))
644 rpc_call_start(task);
647 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
649 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
650 nfs41_call_sync_prepare(task, calldata);
653 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
655 struct nfs41_call_sync_data *data = calldata;
657 nfs41_sequence_done(task, data->seq_res);
660 struct rpc_call_ops nfs41_call_sync_ops = {
661 .rpc_call_prepare = nfs41_call_sync_prepare,
662 .rpc_call_done = nfs41_call_sync_done,
665 struct rpc_call_ops nfs41_call_priv_sync_ops = {
666 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
667 .rpc_call_done = nfs41_call_sync_done,
670 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
671 struct nfs_server *server,
672 struct rpc_message *msg,
673 struct nfs4_sequence_args *args,
674 struct nfs4_sequence_res *res,
679 struct rpc_task *task;
680 struct nfs41_call_sync_data data = {
681 .seq_server = server,
684 .cache_reply = cache_reply,
686 struct rpc_task_setup task_setup = {
689 .callback_ops = &nfs41_call_sync_ops,
690 .callback_data = &data
695 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
696 task = rpc_run_task(&task_setup);
700 ret = task->tk_status;
706 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
707 struct nfs_server *server,
708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
710 struct nfs4_sequence_res *res,
713 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
717 static int nfs4_sequence_done(struct rpc_task *task,
718 struct nfs4_sequence_res *res)
722 #endif /* CONFIG_NFS_V4_1 */
724 int _nfs4_call_sync(struct rpc_clnt *clnt,
725 struct nfs_server *server,
726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
731 args->sa_session = res->sr_session = NULL;
732 return rpc_call_sync(clnt, msg, 0);
736 int nfs4_call_sync(struct rpc_clnt *clnt,
737 struct nfs_server *server,
738 struct rpc_message *msg,
739 struct nfs4_sequence_args *args,
740 struct nfs4_sequence_res *res,
743 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
744 args, res, cache_reply);
747 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
749 struct nfs_inode *nfsi = NFS_I(dir);
751 spin_lock(&dir->i_lock);
752 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
753 if (!cinfo->atomic || cinfo->before != dir->i_version)
754 nfs_force_lookup_revalidate(dir);
755 dir->i_version = cinfo->after;
756 spin_unlock(&dir->i_lock);
759 struct nfs4_opendata {
761 struct nfs_openargs o_arg;
762 struct nfs_openres o_res;
763 struct nfs_open_confirmargs c_arg;
764 struct nfs_open_confirmres c_res;
765 struct nfs4_string owner_name;
766 struct nfs4_string group_name;
767 struct nfs_fattr f_attr;
768 struct nfs_fattr dir_attr;
770 struct dentry *dentry;
771 struct nfs4_state_owner *owner;
772 struct nfs4_state *state;
774 unsigned long timestamp;
775 unsigned int rpc_done : 1;
781 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
783 p->o_res.f_attr = &p->f_attr;
784 p->o_res.dir_attr = &p->dir_attr;
785 p->o_res.seqid = p->o_arg.seqid;
786 p->c_res.seqid = p->c_arg.seqid;
787 p->o_res.server = p->o_arg.server;
788 nfs_fattr_init(&p->f_attr);
789 nfs_fattr_init(&p->dir_attr);
790 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
793 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
794 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
795 const struct iattr *attrs,
798 struct dentry *parent = dget_parent(dentry);
799 struct inode *dir = parent->d_inode;
800 struct nfs_server *server = NFS_SERVER(dir);
801 struct nfs4_opendata *p;
803 p = kzalloc(sizeof(*p), gfp_mask);
806 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
807 if (p->o_arg.seqid == NULL)
809 nfs_sb_active(dentry->d_sb);
810 p->dentry = dget(dentry);
813 atomic_inc(&sp->so_count);
814 p->o_arg.fh = NFS_FH(dir);
815 p->o_arg.open_flags = flags;
816 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
817 p->o_arg.clientid = server->nfs_client->cl_clientid;
818 p->o_arg.id = sp->so_owner_id;
819 p->o_arg.name = &dentry->d_name;
820 p->o_arg.server = server;
821 p->o_arg.bitmask = server->attr_bitmask;
822 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
823 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
824 if (flags & O_CREAT) {
827 p->o_arg.u.attrs = &p->attrs;
828 memcpy(&p->attrs, attrs, sizeof(p->attrs));
829 s = (u32 *) p->o_arg.u.verifier.data;
833 p->c_arg.fh = &p->o_res.fh;
834 p->c_arg.stateid = &p->o_res.stateid;
835 p->c_arg.seqid = p->o_arg.seqid;
836 nfs4_init_opendata_res(p);
846 static void nfs4_opendata_free(struct kref *kref)
848 struct nfs4_opendata *p = container_of(kref,
849 struct nfs4_opendata, kref);
850 struct super_block *sb = p->dentry->d_sb;
852 nfs_free_seqid(p->o_arg.seqid);
853 if (p->state != NULL)
854 nfs4_put_open_state(p->state);
855 nfs4_put_state_owner(p->owner);
859 nfs_fattr_free_names(&p->f_attr);
863 static void nfs4_opendata_put(struct nfs4_opendata *p)
866 kref_put(&p->kref, nfs4_opendata_free);
869 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
873 ret = rpc_wait_for_completion_task(task);
877 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
881 if (open_mode & O_EXCL)
883 switch (mode & (FMODE_READ|FMODE_WRITE)) {
885 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
886 && state->n_rdonly != 0;
889 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
890 && state->n_wronly != 0;
892 case FMODE_READ|FMODE_WRITE:
893 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
894 && state->n_rdwr != 0;
900 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
902 if (delegation == NULL)
904 if ((delegation->type & fmode) != fmode)
906 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
908 nfs_mark_delegation_referenced(delegation);
912 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
921 case FMODE_READ|FMODE_WRITE:
924 nfs4_state_set_mode_locked(state, state->state | fmode);
927 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
929 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
930 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
931 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
934 set_bit(NFS_O_RDONLY_STATE, &state->flags);
937 set_bit(NFS_O_WRONLY_STATE, &state->flags);
939 case FMODE_READ|FMODE_WRITE:
940 set_bit(NFS_O_RDWR_STATE, &state->flags);
944 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
946 write_seqlock(&state->seqlock);
947 nfs_set_open_stateid_locked(state, stateid, fmode);
948 write_sequnlock(&state->seqlock);
951 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
954 * Protect the call to nfs4_state_set_mode_locked and
955 * serialise the stateid update
957 write_seqlock(&state->seqlock);
958 if (deleg_stateid != NULL) {
959 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
960 set_bit(NFS_DELEGATED_STATE, &state->flags);
962 if (open_stateid != NULL)
963 nfs_set_open_stateid_locked(state, open_stateid, fmode);
964 write_sequnlock(&state->seqlock);
965 spin_lock(&state->owner->so_lock);
966 update_open_stateflags(state, fmode);
967 spin_unlock(&state->owner->so_lock);
970 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
972 struct nfs_inode *nfsi = NFS_I(state->inode);
973 struct nfs_delegation *deleg_cur;
976 fmode &= (FMODE_READ|FMODE_WRITE);
979 deleg_cur = rcu_dereference(nfsi->delegation);
980 if (deleg_cur == NULL)
983 spin_lock(&deleg_cur->lock);
984 if (nfsi->delegation != deleg_cur ||
985 (deleg_cur->type & fmode) != fmode)
986 goto no_delegation_unlock;
988 if (delegation == NULL)
989 delegation = &deleg_cur->stateid;
990 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
991 goto no_delegation_unlock;
993 nfs_mark_delegation_referenced(deleg_cur);
994 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
996 no_delegation_unlock:
997 spin_unlock(&deleg_cur->lock);
1001 if (!ret && open_stateid != NULL) {
1002 __update_open_stateid(state, open_stateid, NULL, fmode);
1010 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1012 struct nfs_delegation *delegation;
1015 delegation = rcu_dereference(NFS_I(inode)->delegation);
1016 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1021 nfs_inode_return_delegation(inode);
1024 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1026 struct nfs4_state *state = opendata->state;
1027 struct nfs_inode *nfsi = NFS_I(state->inode);
1028 struct nfs_delegation *delegation;
1029 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1030 fmode_t fmode = opendata->o_arg.fmode;
1031 nfs4_stateid stateid;
1035 if (can_open_cached(state, fmode, open_mode)) {
1036 spin_lock(&state->owner->so_lock);
1037 if (can_open_cached(state, fmode, open_mode)) {
1038 update_open_stateflags(state, fmode);
1039 spin_unlock(&state->owner->so_lock);
1040 goto out_return_state;
1042 spin_unlock(&state->owner->so_lock);
1045 delegation = rcu_dereference(nfsi->delegation);
1046 if (!can_open_delegated(delegation, fmode)) {
1050 /* Save the delegation */
1051 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1053 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1058 /* Try to update the stateid using the delegation */
1059 if (update_open_stateid(state, NULL, &stateid, fmode))
1060 goto out_return_state;
1063 return ERR_PTR(ret);
1065 atomic_inc(&state->count);
1069 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1071 struct inode *inode;
1072 struct nfs4_state *state = NULL;
1073 struct nfs_delegation *delegation;
1076 if (!data->rpc_done) {
1077 state = nfs4_try_open_cached(data);
1082 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1084 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1085 ret = PTR_ERR(inode);
1089 state = nfs4_get_open_state(inode, data->owner);
1092 if (data->o_res.delegation_type != 0) {
1093 int delegation_flags = 0;
1096 delegation = rcu_dereference(NFS_I(inode)->delegation);
1098 delegation_flags = delegation->flags;
1100 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1101 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1102 "returning a delegation for "
1103 "OPEN(CLAIM_DELEGATE_CUR)\n",
1104 NFS_CLIENT(inode)->cl_server);
1105 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1106 nfs_inode_set_delegation(state->inode,
1107 data->owner->so_cred,
1110 nfs_inode_reclaim_delegation(state->inode,
1111 data->owner->so_cred,
1115 update_open_stateid(state, &data->o_res.stateid, NULL,
1123 return ERR_PTR(ret);
1126 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1128 struct nfs_inode *nfsi = NFS_I(state->inode);
1129 struct nfs_open_context *ctx;
1131 spin_lock(&state->inode->i_lock);
1132 list_for_each_entry(ctx, &nfsi->open_files, list) {
1133 if (ctx->state != state)
1135 get_nfs_open_context(ctx);
1136 spin_unlock(&state->inode->i_lock);
1139 spin_unlock(&state->inode->i_lock);
1140 return ERR_PTR(-ENOENT);
1143 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1145 struct nfs4_opendata *opendata;
1147 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1148 if (opendata == NULL)
1149 return ERR_PTR(-ENOMEM);
1150 opendata->state = state;
1151 atomic_inc(&state->count);
1155 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1157 struct nfs4_state *newstate;
1160 opendata->o_arg.open_flags = 0;
1161 opendata->o_arg.fmode = fmode;
1162 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1163 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1164 nfs4_init_opendata_res(opendata);
1165 ret = _nfs4_recover_proc_open(opendata);
1168 newstate = nfs4_opendata_to_nfs4_state(opendata);
1169 if (IS_ERR(newstate))
1170 return PTR_ERR(newstate);
1171 nfs4_close_state(newstate, fmode);
1176 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1178 struct nfs4_state *newstate;
1181 /* memory barrier prior to reading state->n_* */
1182 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1184 if (state->n_rdwr != 0) {
1185 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1186 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1189 if (newstate != state)
1192 if (state->n_wronly != 0) {
1193 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1194 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1197 if (newstate != state)
1200 if (state->n_rdonly != 0) {
1201 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1202 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1205 if (newstate != state)
1209 * We may have performed cached opens for all three recoveries.
1210 * Check if we need to update the current stateid.
1212 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1213 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1214 write_seqlock(&state->seqlock);
1215 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1216 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1217 write_sequnlock(&state->seqlock);
1224 * reclaim state on the server after a reboot.
1226 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1228 struct nfs_delegation *delegation;
1229 struct nfs4_opendata *opendata;
1230 fmode_t delegation_type = 0;
1233 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1234 if (IS_ERR(opendata))
1235 return PTR_ERR(opendata);
1236 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1237 opendata->o_arg.fh = NFS_FH(state->inode);
1239 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1240 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1241 delegation_type = delegation->type;
1243 opendata->o_arg.u.delegation_type = delegation_type;
1244 status = nfs4_open_recover(opendata, state);
1245 nfs4_opendata_put(opendata);
1249 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1251 struct nfs_server *server = NFS_SERVER(state->inode);
1252 struct nfs4_exception exception = { };
1255 err = _nfs4_do_open_reclaim(ctx, state);
1256 if (err != -NFS4ERR_DELAY)
1258 nfs4_handle_exception(server, err, &exception);
1259 } while (exception.retry);
1263 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1265 struct nfs_open_context *ctx;
1268 ctx = nfs4_state_find_open_context(state);
1270 return PTR_ERR(ctx);
1271 ret = nfs4_do_open_reclaim(ctx, state);
1272 put_nfs_open_context(ctx);
1276 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1278 struct nfs4_opendata *opendata;
1281 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1282 if (IS_ERR(opendata))
1283 return PTR_ERR(opendata);
1284 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1285 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1286 sizeof(opendata->o_arg.u.delegation.data));
1287 ret = nfs4_open_recover(opendata, state);
1288 nfs4_opendata_put(opendata);
1292 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1294 struct nfs4_exception exception = { };
1295 struct nfs_server *server = NFS_SERVER(state->inode);
1298 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1304 case -NFS4ERR_BADSESSION:
1305 case -NFS4ERR_BADSLOT:
1306 case -NFS4ERR_BAD_HIGH_SLOT:
1307 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1308 case -NFS4ERR_DEADSESSION:
1309 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1311 case -NFS4ERR_STALE_CLIENTID:
1312 case -NFS4ERR_STALE_STATEID:
1313 case -NFS4ERR_EXPIRED:
1314 /* Don't recall a delegation if it was lost */
1315 nfs4_schedule_lease_recovery(server->nfs_client);
1319 * The show must go on: exit, but mark the
1320 * stateid as needing recovery.
1322 case -NFS4ERR_ADMIN_REVOKED:
1323 case -NFS4ERR_BAD_STATEID:
1324 nfs4_schedule_stateid_recovery(server, state);
1327 * User RPCSEC_GSS context has expired.
1328 * We cannot recover this stateid now, so
1329 * skip it and allow recovery thread to
1336 err = nfs4_handle_exception(server, err, &exception);
1337 } while (exception.retry);
1342 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1344 struct nfs4_opendata *data = calldata;
1346 data->rpc_status = task->tk_status;
1347 if (data->rpc_status == 0) {
1348 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1349 sizeof(data->o_res.stateid.data));
1350 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1351 renew_lease(data->o_res.server, data->timestamp);
1356 static void nfs4_open_confirm_release(void *calldata)
1358 struct nfs4_opendata *data = calldata;
1359 struct nfs4_state *state = NULL;
1361 /* If this request hasn't been cancelled, do nothing */
1362 if (data->cancelled == 0)
1364 /* In case of error, no cleanup! */
1365 if (!data->rpc_done)
1367 state = nfs4_opendata_to_nfs4_state(data);
1369 nfs4_close_state(state, data->o_arg.fmode);
1371 nfs4_opendata_put(data);
1374 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1375 .rpc_call_done = nfs4_open_confirm_done,
1376 .rpc_release = nfs4_open_confirm_release,
1380 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1382 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1384 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1385 struct rpc_task *task;
1386 struct rpc_message msg = {
1387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1388 .rpc_argp = &data->c_arg,
1389 .rpc_resp = &data->c_res,
1390 .rpc_cred = data->owner->so_cred,
1392 struct rpc_task_setup task_setup_data = {
1393 .rpc_client = server->client,
1394 .rpc_message = &msg,
1395 .callback_ops = &nfs4_open_confirm_ops,
1396 .callback_data = data,
1397 .workqueue = nfsiod_workqueue,
1398 .flags = RPC_TASK_ASYNC,
1402 kref_get(&data->kref);
1404 data->rpc_status = 0;
1405 data->timestamp = jiffies;
1406 task = rpc_run_task(&task_setup_data);
1408 return PTR_ERR(task);
1409 status = nfs4_wait_for_completion_rpc_task(task);
1411 data->cancelled = 1;
1414 status = data->rpc_status;
1419 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1421 struct nfs4_opendata *data = calldata;
1422 struct nfs4_state_owner *sp = data->owner;
1424 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1427 * Check if we still need to send an OPEN call, or if we can use
1428 * a delegation instead.
1430 if (data->state != NULL) {
1431 struct nfs_delegation *delegation;
1433 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1436 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1437 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1438 can_open_delegated(delegation, data->o_arg.fmode))
1439 goto unlock_no_action;
1442 /* Update sequence id. */
1443 data->o_arg.id = sp->so_owner_id;
1444 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1445 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1446 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1447 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1449 data->timestamp = jiffies;
1450 if (nfs4_setup_sequence(data->o_arg.server,
1451 &data->o_arg.seq_args,
1452 &data->o_res.seq_res, 1, task))
1454 rpc_call_start(task);
1459 task->tk_action = NULL;
1463 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1465 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1466 nfs4_open_prepare(task, calldata);
1469 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1471 struct nfs4_opendata *data = calldata;
1473 data->rpc_status = task->tk_status;
1475 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1478 if (task->tk_status == 0) {
1479 switch (data->o_res.f_attr->mode & S_IFMT) {
1483 data->rpc_status = -ELOOP;
1486 data->rpc_status = -EISDIR;
1489 data->rpc_status = -ENOTDIR;
1491 renew_lease(data->o_res.server, data->timestamp);
1492 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1493 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1498 static void nfs4_open_release(void *calldata)
1500 struct nfs4_opendata *data = calldata;
1501 struct nfs4_state *state = NULL;
1503 /* If this request hasn't been cancelled, do nothing */
1504 if (data->cancelled == 0)
1506 /* In case of error, no cleanup! */
1507 if (data->rpc_status != 0 || !data->rpc_done)
1509 /* In case we need an open_confirm, no cleanup! */
1510 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1512 state = nfs4_opendata_to_nfs4_state(data);
1514 nfs4_close_state(state, data->o_arg.fmode);
1516 nfs4_opendata_put(data);
1519 static const struct rpc_call_ops nfs4_open_ops = {
1520 .rpc_call_prepare = nfs4_open_prepare,
1521 .rpc_call_done = nfs4_open_done,
1522 .rpc_release = nfs4_open_release,
1525 static const struct rpc_call_ops nfs4_recover_open_ops = {
1526 .rpc_call_prepare = nfs4_recover_open_prepare,
1527 .rpc_call_done = nfs4_open_done,
1528 .rpc_release = nfs4_open_release,
1531 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1533 struct inode *dir = data->dir->d_inode;
1534 struct nfs_server *server = NFS_SERVER(dir);
1535 struct nfs_openargs *o_arg = &data->o_arg;
1536 struct nfs_openres *o_res = &data->o_res;
1537 struct rpc_task *task;
1538 struct rpc_message msg = {
1539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1542 .rpc_cred = data->owner->so_cred,
1544 struct rpc_task_setup task_setup_data = {
1545 .rpc_client = server->client,
1546 .rpc_message = &msg,
1547 .callback_ops = &nfs4_open_ops,
1548 .callback_data = data,
1549 .workqueue = nfsiod_workqueue,
1550 .flags = RPC_TASK_ASYNC,
1554 kref_get(&data->kref);
1556 data->rpc_status = 0;
1557 data->cancelled = 0;
1559 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1560 task = rpc_run_task(&task_setup_data);
1562 return PTR_ERR(task);
1563 status = nfs4_wait_for_completion_rpc_task(task);
1565 data->cancelled = 1;
1568 status = data->rpc_status;
1574 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1576 struct inode *dir = data->dir->d_inode;
1577 struct nfs_openres *o_res = &data->o_res;
1580 status = nfs4_run_open_task(data, 1);
1581 if (status != 0 || !data->rpc_done)
1584 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1586 nfs_refresh_inode(dir, o_res->dir_attr);
1588 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1589 status = _nfs4_proc_open_confirm(data);
1598 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1600 static int _nfs4_proc_open(struct nfs4_opendata *data)
1602 struct inode *dir = data->dir->d_inode;
1603 struct nfs_server *server = NFS_SERVER(dir);
1604 struct nfs_openargs *o_arg = &data->o_arg;
1605 struct nfs_openres *o_res = &data->o_res;
1608 status = nfs4_run_open_task(data, 0);
1609 if (!data->rpc_done)
1612 if (status == -NFS4ERR_BADNAME &&
1613 !(o_arg->open_flags & O_CREAT))
1618 nfs_fattr_map_and_free_names(server, &data->f_attr);
1620 if (o_arg->open_flags & O_CREAT) {
1621 update_changeattr(dir, &o_res->cinfo);
1622 nfs_post_op_update_inode(dir, o_res->dir_attr);
1624 nfs_refresh_inode(dir, o_res->dir_attr);
1625 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1626 server->caps &= ~NFS_CAP_POSIX_LOCK;
1627 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1628 status = _nfs4_proc_open_confirm(data);
1632 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1633 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1637 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1642 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1643 ret = nfs4_wait_clnt_recover(clp);
1646 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1647 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1649 nfs4_schedule_state_manager(clp);
1655 static int nfs4_recover_expired_lease(struct nfs_server *server)
1657 return nfs4_client_recover_expired_lease(server->nfs_client);
1662 * reclaim state on the server after a network partition.
1663 * Assumes caller holds the appropriate lock
1665 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1667 struct nfs4_opendata *opendata;
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1671 if (IS_ERR(opendata))
1672 return PTR_ERR(opendata);
1673 ret = nfs4_open_recover(opendata, state);
1675 d_drop(ctx->dentry);
1676 nfs4_opendata_put(opendata);
1680 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1682 struct nfs_server *server = NFS_SERVER(state->inode);
1683 struct nfs4_exception exception = { };
1687 err = _nfs4_open_expired(ctx, state);
1691 case -NFS4ERR_GRACE:
1692 case -NFS4ERR_DELAY:
1693 nfs4_handle_exception(server, err, &exception);
1696 } while (exception.retry);
1701 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1703 struct nfs_open_context *ctx;
1706 ctx = nfs4_state_find_open_context(state);
1708 return PTR_ERR(ctx);
1709 ret = nfs4_do_open_expired(ctx, state);
1710 put_nfs_open_context(ctx);
1714 #if defined(CONFIG_NFS_V4_1)
1715 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1718 struct nfs_server *server = NFS_SERVER(state->inode);
1720 status = nfs41_test_stateid(server, state);
1721 if (status == NFS_OK)
1723 nfs41_free_stateid(server, state);
1724 return nfs4_open_expired(sp, state);
1729 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1730 * fields corresponding to attributes that were used to store the verifier.
1731 * Make sure we clobber those fields in the later setattr call
1733 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1735 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1736 !(sattr->ia_valid & ATTR_ATIME_SET))
1737 sattr->ia_valid |= ATTR_ATIME;
1739 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1740 !(sattr->ia_valid & ATTR_MTIME_SET))
1741 sattr->ia_valid |= ATTR_MTIME;
1745 * Returns a referenced nfs4_state
1747 static 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)
1749 struct nfs4_state_owner *sp;
1750 struct nfs4_state *state = NULL;
1751 struct nfs_server *server = NFS_SERVER(dir);
1752 struct nfs4_opendata *opendata;
1755 /* Protect against reboot recovery conflicts */
1757 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1759 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1762 status = nfs4_recover_expired_lease(server);
1764 goto err_put_state_owner;
1765 if (dentry->d_inode != NULL)
1766 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1768 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1769 if (opendata == NULL)
1770 goto err_put_state_owner;
1772 if (dentry->d_inode != NULL)
1773 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1775 status = _nfs4_proc_open(opendata);
1777 goto err_opendata_put;
1779 state = nfs4_opendata_to_nfs4_state(opendata);
1780 status = PTR_ERR(state);
1782 goto err_opendata_put;
1783 if (server->caps & NFS_CAP_POSIX_LOCK)
1784 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1786 if (opendata->o_arg.open_flags & O_EXCL) {
1787 nfs4_exclusive_attrset(opendata, sattr);
1789 nfs_fattr_init(opendata->o_res.f_attr);
1790 status = nfs4_do_setattr(state->inode, cred,
1791 opendata->o_res.f_attr, sattr,
1794 nfs_setattr_update_inode(state->inode, sattr);
1795 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1797 nfs4_opendata_put(opendata);
1798 nfs4_put_state_owner(sp);
1802 nfs4_opendata_put(opendata);
1803 err_put_state_owner:
1804 nfs4_put_state_owner(sp);
1811 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1813 struct nfs4_exception exception = { };
1814 struct nfs4_state *res;
1818 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1821 /* NOTE: BAD_SEQID means the server and client disagree about the
1822 * book-keeping w.r.t. state-changing operations
1823 * (OPEN/CLOSE/LOCK/LOCKU...)
1824 * It is actually a sign of a bug on the client or on the server.
1826 * If we receive a BAD_SEQID error in the particular case of
1827 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1828 * have unhashed the old state_owner for us, and that we can
1829 * therefore safely retry using a new one. We should still warn
1830 * the user though...
1832 if (status == -NFS4ERR_BAD_SEQID) {
1833 printk(KERN_WARNING "NFS: v4 server %s "
1834 " returned a bad sequence-id error!\n",
1835 NFS_SERVER(dir)->nfs_client->cl_hostname);
1836 exception.retry = 1;
1840 * BAD_STATEID on OPEN means that the server cancelled our
1841 * state before it received the OPEN_CONFIRM.
1842 * Recover by retrying the request as per the discussion
1843 * on Page 181 of RFC3530.
1845 if (status == -NFS4ERR_BAD_STATEID) {
1846 exception.retry = 1;
1849 if (status == -EAGAIN) {
1850 /* We must have found a delegation */
1851 exception.retry = 1;
1854 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1855 status, &exception));
1856 } while (exception.retry);
1860 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1861 struct nfs_fattr *fattr, struct iattr *sattr,
1862 struct nfs4_state *state)
1864 struct nfs_server *server = NFS_SERVER(inode);
1865 struct nfs_setattrargs arg = {
1866 .fh = NFS_FH(inode),
1869 .bitmask = server->attr_bitmask,
1871 struct nfs_setattrres res = {
1875 struct rpc_message msg = {
1876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1881 unsigned long timestamp = jiffies;
1884 nfs_fattr_init(fattr);
1886 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1887 /* Use that stateid */
1888 } else if (state != NULL) {
1889 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1891 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1893 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1894 if (status == 0 && state != NULL)
1895 renew_lease(server, timestamp);
1899 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1900 struct nfs_fattr *fattr, struct iattr *sattr,
1901 struct nfs4_state *state)
1903 struct nfs_server *server = NFS_SERVER(inode);
1904 struct nfs4_exception exception = { };
1907 err = nfs4_handle_exception(server,
1908 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1910 } while (exception.retry);
1914 struct nfs4_closedata {
1915 struct inode *inode;
1916 struct nfs4_state *state;
1917 struct nfs_closeargs arg;
1918 struct nfs_closeres res;
1919 struct nfs_fattr fattr;
1920 unsigned long timestamp;
1925 static void nfs4_free_closedata(void *data)
1927 struct nfs4_closedata *calldata = data;
1928 struct nfs4_state_owner *sp = calldata->state->owner;
1929 struct super_block *sb = calldata->state->inode->i_sb;
1932 pnfs_roc_release(calldata->state->inode);
1933 nfs4_put_open_state(calldata->state);
1934 nfs_free_seqid(calldata->arg.seqid);
1935 nfs4_put_state_owner(sp);
1936 nfs_sb_deactive(sb);
1940 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1943 spin_lock(&state->owner->so_lock);
1944 if (!(fmode & FMODE_READ))
1945 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1946 if (!(fmode & FMODE_WRITE))
1947 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1948 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1949 spin_unlock(&state->owner->so_lock);
1952 static void nfs4_close_done(struct rpc_task *task, void *data)
1954 struct nfs4_closedata *calldata = data;
1955 struct nfs4_state *state = calldata->state;
1956 struct nfs_server *server = NFS_SERVER(calldata->inode);
1958 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1960 /* hmm. we are done with the inode, and in the process of freeing
1961 * the state_owner. we keep this around to process errors
1963 switch (task->tk_status) {
1966 pnfs_roc_set_barrier(state->inode,
1967 calldata->roc_barrier);
1968 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1969 renew_lease(server, calldata->timestamp);
1970 nfs4_close_clear_stateid_flags(state,
1971 calldata->arg.fmode);
1973 case -NFS4ERR_STALE_STATEID:
1974 case -NFS4ERR_OLD_STATEID:
1975 case -NFS4ERR_BAD_STATEID:
1976 case -NFS4ERR_EXPIRED:
1977 if (calldata->arg.fmode == 0)
1980 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1981 rpc_restart_call_prepare(task);
1983 nfs_release_seqid(calldata->arg.seqid);
1984 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1987 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1989 struct nfs4_closedata *calldata = data;
1990 struct nfs4_state *state = calldata->state;
1993 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1996 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1997 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1998 spin_lock(&state->owner->so_lock);
1999 /* Calculate the change in open mode */
2000 if (state->n_rdwr == 0) {
2001 if (state->n_rdonly == 0) {
2002 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2003 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2004 calldata->arg.fmode &= ~FMODE_READ;
2006 if (state->n_wronly == 0) {
2007 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2008 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2009 calldata->arg.fmode &= ~FMODE_WRITE;
2012 spin_unlock(&state->owner->so_lock);
2015 /* Note: exit _without_ calling nfs4_close_done */
2016 task->tk_action = NULL;
2020 if (calldata->arg.fmode == 0) {
2021 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2022 if (calldata->roc &&
2023 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2024 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2030 nfs_fattr_init(calldata->res.fattr);
2031 calldata->timestamp = jiffies;
2032 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2033 &calldata->arg.seq_args, &calldata->res.seq_res,
2036 rpc_call_start(task);
2039 static const struct rpc_call_ops nfs4_close_ops = {
2040 .rpc_call_prepare = nfs4_close_prepare,
2041 .rpc_call_done = nfs4_close_done,
2042 .rpc_release = nfs4_free_closedata,
2046 * It is possible for data to be read/written from a mem-mapped file
2047 * after the sys_close call (which hits the vfs layer as a flush).
2048 * This means that we can't safely call nfsv4 close on a file until
2049 * the inode is cleared. This in turn means that we are not good
2050 * NFSv4 citizens - we do not indicate to the server to update the file's
2051 * share state even when we are done with one of the three share
2052 * stateid's in the inode.
2054 * NOTE: Caller must be holding the sp->so_owner semaphore!
2056 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2058 struct nfs_server *server = NFS_SERVER(state->inode);
2059 struct nfs4_closedata *calldata;
2060 struct nfs4_state_owner *sp = state->owner;
2061 struct rpc_task *task;
2062 struct rpc_message msg = {
2063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2064 .rpc_cred = state->owner->so_cred,
2066 struct rpc_task_setup task_setup_data = {
2067 .rpc_client = server->client,
2068 .rpc_message = &msg,
2069 .callback_ops = &nfs4_close_ops,
2070 .workqueue = nfsiod_workqueue,
2071 .flags = RPC_TASK_ASYNC,
2073 int status = -ENOMEM;
2075 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2076 if (calldata == NULL)
2078 calldata->inode = state->inode;
2079 calldata->state = state;
2080 calldata->arg.fh = NFS_FH(state->inode);
2081 calldata->arg.stateid = &state->open_stateid;
2082 /* Serialization for the sequence id */
2083 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2084 if (calldata->arg.seqid == NULL)
2085 goto out_free_calldata;
2086 calldata->arg.fmode = 0;
2087 calldata->arg.bitmask = server->cache_consistency_bitmask;
2088 calldata->res.fattr = &calldata->fattr;
2089 calldata->res.seqid = calldata->arg.seqid;
2090 calldata->res.server = server;
2091 calldata->roc = roc;
2092 nfs_sb_active(calldata->inode->i_sb);
2094 msg.rpc_argp = &calldata->arg;
2095 msg.rpc_resp = &calldata->res;
2096 task_setup_data.callback_data = calldata;
2097 task = rpc_run_task(&task_setup_data);
2099 return PTR_ERR(task);
2102 status = rpc_wait_for_completion_task(task);
2109 pnfs_roc_release(state->inode);
2110 nfs4_put_open_state(state);
2111 nfs4_put_state_owner(sp);
2115 static struct inode *
2116 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2118 struct nfs4_state *state;
2120 /* Protect against concurrent sillydeletes */
2121 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2123 return ERR_CAST(state);
2125 return igrab(state->inode);
2128 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2130 if (ctx->state == NULL)
2133 nfs4_close_sync(ctx->state, ctx->mode);
2135 nfs4_close_state(ctx->state, ctx->mode);
2138 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2140 struct nfs4_server_caps_arg args = {
2143 struct nfs4_server_caps_res res = {};
2144 struct rpc_message msg = {
2145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2151 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2153 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2154 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2155 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2156 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2157 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2158 NFS_CAP_CTIME|NFS_CAP_MTIME);
2159 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2160 server->caps |= NFS_CAP_ACLS;
2161 if (res.has_links != 0)
2162 server->caps |= NFS_CAP_HARDLINKS;
2163 if (res.has_symlinks != 0)
2164 server->caps |= NFS_CAP_SYMLINKS;
2165 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2166 server->caps |= NFS_CAP_FILEID;
2167 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2168 server->caps |= NFS_CAP_MODE;
2169 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2170 server->caps |= NFS_CAP_NLINK;
2171 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2172 server->caps |= NFS_CAP_OWNER;
2173 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2174 server->caps |= NFS_CAP_OWNER_GROUP;
2175 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2176 server->caps |= NFS_CAP_ATIME;
2177 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2178 server->caps |= NFS_CAP_CTIME;
2179 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2180 server->caps |= NFS_CAP_MTIME;
2182 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2183 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2184 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2185 server->acl_bitmask = res.acl_bitmask;
2191 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2193 struct nfs4_exception exception = { };
2196 err = nfs4_handle_exception(server,
2197 _nfs4_server_capabilities(server, fhandle),
2199 } while (exception.retry);
2203 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2204 struct nfs_fsinfo *info)
2206 struct nfs4_lookup_root_arg args = {
2207 .bitmask = nfs4_fattr_bitmap,
2209 struct nfs4_lookup_res res = {
2211 .fattr = info->fattr,
2214 struct rpc_message msg = {
2215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2220 nfs_fattr_init(info->fattr);
2221 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2224 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2225 struct nfs_fsinfo *info)
2227 struct nfs4_exception exception = { };
2230 err = _nfs4_lookup_root(server, fhandle, info);
2233 case -NFS4ERR_WRONGSEC:
2236 err = nfs4_handle_exception(server, err, &exception);
2238 } while (exception.retry);
2242 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2243 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2245 struct rpc_auth *auth;
2248 auth = rpcauth_create(flavor, server->client);
2253 ret = nfs4_lookup_root(server, fhandle, info);
2258 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2259 struct nfs_fsinfo *info)
2261 int i, len, status = 0;
2262 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2264 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2265 flav_array[len] = RPC_AUTH_NULL;
2268 for (i = 0; i < len; i++) {
2269 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2270 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2275 * -EACCESS could mean that the user doesn't have correct permissions
2276 * to access the mount. It could also mean that we tried to mount
2277 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2278 * existing mount programs don't handle -EACCES very well so it should
2279 * be mapped to -EPERM instead.
2281 if (status == -EACCES)
2287 * get the file handle for the "/" directory on the server
2289 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2290 struct nfs_fsinfo *info)
2292 int minor_version = server->nfs_client->cl_minorversion;
2293 int status = nfs4_lookup_root(server, fhandle, info);
2294 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2296 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2297 * by nfs4_map_errors() as this function exits.
2299 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2301 status = nfs4_server_capabilities(server, fhandle);
2303 status = nfs4_do_fsinfo(server, fhandle, info);
2304 return nfs4_map_errors(status);
2307 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2309 * Get locations and (maybe) other attributes of a referral.
2310 * Note that we'll actually follow the referral later when
2311 * we detect fsid mismatch in inode revalidation
2313 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2314 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2316 int status = -ENOMEM;
2317 struct page *page = NULL;
2318 struct nfs4_fs_locations *locations = NULL;
2320 page = alloc_page(GFP_KERNEL);
2323 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2324 if (locations == NULL)
2327 status = nfs4_proc_fs_locations(dir, name, locations, page);
2330 /* Make sure server returned a different fsid for the referral */
2331 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2332 dprintk("%s: server did not return a different fsid for"
2333 " a referral at %s\n", __func__, name->name);
2337 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2338 nfs_fixup_referral_attributes(&locations->fattr);
2340 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2341 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2342 memset(fhandle, 0, sizeof(struct nfs_fh));
2350 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2352 struct nfs4_getattr_arg args = {
2354 .bitmask = server->attr_bitmask,
2356 struct nfs4_getattr_res res = {
2360 struct rpc_message msg = {
2361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2366 nfs_fattr_init(fattr);
2367 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2370 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2372 struct nfs4_exception exception = { };
2375 err = nfs4_handle_exception(server,
2376 _nfs4_proc_getattr(server, fhandle, fattr),
2378 } while (exception.retry);
2383 * The file is not closed if it is opened due to the a request to change
2384 * the size of the file. The open call will not be needed once the
2385 * VFS layer lookup-intents are implemented.
2387 * Close is called when the inode is destroyed.
2388 * If we haven't opened the file for O_WRONLY, we
2389 * need to in the size_change case to obtain a stateid.
2392 * Because OPEN is always done by name in nfsv4, it is
2393 * possible that we opened a different file by the same
2394 * name. We can recognize this race condition, but we
2395 * can't do anything about it besides returning an error.
2397 * This will be fixed with VFS changes (lookup-intent).
2400 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2401 struct iattr *sattr)
2403 struct inode *inode = dentry->d_inode;
2404 struct rpc_cred *cred = NULL;
2405 struct nfs4_state *state = NULL;
2408 if (pnfs_ld_layoutret_on_setattr(inode))
2409 pnfs_return_layout(inode);
2411 nfs_fattr_init(fattr);
2413 /* Search for an existing open(O_WRITE) file */
2414 if (sattr->ia_valid & ATTR_FILE) {
2415 struct nfs_open_context *ctx;
2417 ctx = nfs_file_open_context(sattr->ia_file);
2424 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2426 nfs_setattr_update_inode(inode, sattr);
2430 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2431 const struct qstr *name, struct nfs_fh *fhandle,
2432 struct nfs_fattr *fattr)
2434 struct nfs_server *server = NFS_SERVER(dir);
2436 struct nfs4_lookup_arg args = {
2437 .bitmask = server->attr_bitmask,
2438 .dir_fh = NFS_FH(dir),
2441 struct nfs4_lookup_res res = {
2446 struct rpc_message msg = {
2447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2452 nfs_fattr_init(fattr);
2454 dprintk("NFS call lookup %s\n", name->name);
2455 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2456 dprintk("NFS reply lookup: %d\n", status);
2460 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2462 memset(fh, 0, sizeof(struct nfs_fh));
2463 fattr->fsid.major = 1;
2464 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2465 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2466 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2470 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2471 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2473 struct nfs4_exception exception = { };
2478 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2480 case -NFS4ERR_BADNAME:
2482 case -NFS4ERR_MOVED:
2483 return nfs4_get_referral(dir, name, fattr, fhandle);
2484 case -NFS4ERR_WRONGSEC:
2485 nfs_fixup_secinfo_attributes(fattr, fhandle);
2487 err = nfs4_handle_exception(NFS_SERVER(dir),
2488 status, &exception);
2489 } while (exception.retry);
2493 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2495 struct nfs_server *server = NFS_SERVER(inode);
2496 struct nfs4_accessargs args = {
2497 .fh = NFS_FH(inode),
2498 .bitmask = server->attr_bitmask,
2500 struct nfs4_accessres res = {
2503 struct rpc_message msg = {
2504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2507 .rpc_cred = entry->cred,
2509 int mode = entry->mask;
2513 * Determine which access bits we want to ask for...
2515 if (mode & MAY_READ)
2516 args.access |= NFS4_ACCESS_READ;
2517 if (S_ISDIR(inode->i_mode)) {
2518 if (mode & MAY_WRITE)
2519 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2520 if (mode & MAY_EXEC)
2521 args.access |= NFS4_ACCESS_LOOKUP;
2523 if (mode & MAY_WRITE)
2524 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2525 if (mode & MAY_EXEC)
2526 args.access |= NFS4_ACCESS_EXECUTE;
2529 res.fattr = nfs_alloc_fattr();
2530 if (res.fattr == NULL)
2533 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2536 if (res.access & NFS4_ACCESS_READ)
2537 entry->mask |= MAY_READ;
2538 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2539 entry->mask |= MAY_WRITE;
2540 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2541 entry->mask |= MAY_EXEC;
2542 nfs_refresh_inode(inode, res.fattr);
2544 nfs_free_fattr(res.fattr);
2548 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2550 struct nfs4_exception exception = { };
2553 err = nfs4_handle_exception(NFS_SERVER(inode),
2554 _nfs4_proc_access(inode, entry),
2556 } while (exception.retry);
2561 * TODO: For the time being, we don't try to get any attributes
2562 * along with any of the zero-copy operations READ, READDIR,
2565 * In the case of the first three, we want to put the GETATTR
2566 * after the read-type operation -- this is because it is hard
2567 * to predict the length of a GETATTR response in v4, and thus
2568 * align the READ data correctly. This means that the GETATTR
2569 * may end up partially falling into the page cache, and we should
2570 * shift it into the 'tail' of the xdr_buf before processing.
2571 * To do this efficiently, we need to know the total length
2572 * of data received, which doesn't seem to be available outside
2575 * In the case of WRITE, we also want to put the GETATTR after
2576 * the operation -- in this case because we want to make sure
2577 * we get the post-operation mtime and size. This means that
2578 * we can't use xdr_encode_pages() as written: we need a variant
2579 * of it which would leave room in the 'tail' iovec.
2581 * Both of these changes to the XDR layer would in fact be quite
2582 * minor, but I decided to leave them for a subsequent patch.
2584 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2585 unsigned int pgbase, unsigned int pglen)
2587 struct nfs4_readlink args = {
2588 .fh = NFS_FH(inode),
2593 struct nfs4_readlink_res res;
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2600 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2603 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2604 unsigned int pgbase, unsigned int pglen)
2606 struct nfs4_exception exception = { };
2609 err = nfs4_handle_exception(NFS_SERVER(inode),
2610 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2612 } while (exception.retry);
2618 * We will need to arrange for the VFS layer to provide an atomic open.
2619 * Until then, this create/open method is prone to inefficiency and race
2620 * conditions due to the lookup, create, and open VFS calls from sys_open()
2621 * placed on the wire.
2623 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2624 * The file will be opened again in the subsequent VFS open call
2625 * (nfs4_proc_file_open).
2627 * The open for read will just hang around to be used by any process that
2628 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2632 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2633 int flags, struct nfs_open_context *ctx)
2635 struct dentry *de = dentry;
2636 struct nfs4_state *state;
2637 struct rpc_cred *cred = NULL;
2646 sattr->ia_mode &= ~current_umask();
2647 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2649 if (IS_ERR(state)) {
2650 status = PTR_ERR(state);
2653 d_add(dentry, igrab(state->inode));
2654 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2658 nfs4_close_sync(state, fmode);
2663 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2665 struct nfs_server *server = NFS_SERVER(dir);
2666 struct nfs_removeargs args = {
2668 .name.len = name->len,
2669 .name.name = name->name,
2670 .bitmask = server->attr_bitmask,
2672 struct nfs_removeres res = {
2675 struct rpc_message msg = {
2676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2680 int status = -ENOMEM;
2682 res.dir_attr = nfs_alloc_fattr();
2683 if (res.dir_attr == NULL)
2686 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2688 update_changeattr(dir, &res.cinfo);
2689 nfs_post_op_update_inode(dir, res.dir_attr);
2691 nfs_free_fattr(res.dir_attr);
2696 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2698 struct nfs4_exception exception = { };
2701 err = nfs4_handle_exception(NFS_SERVER(dir),
2702 _nfs4_proc_remove(dir, name),
2704 } while (exception.retry);
2708 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2710 struct nfs_server *server = NFS_SERVER(dir);
2711 struct nfs_removeargs *args = msg->rpc_argp;
2712 struct nfs_removeres *res = msg->rpc_resp;
2714 args->bitmask = server->cache_consistency_bitmask;
2715 res->server = server;
2716 res->seq_res.sr_slot = NULL;
2717 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2720 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2722 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2724 if (!nfs4_sequence_done(task, &res->seq_res))
2726 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2728 update_changeattr(dir, &res->cinfo);
2729 nfs_post_op_update_inode(dir, res->dir_attr);
2733 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2735 struct nfs_server *server = NFS_SERVER(dir);
2736 struct nfs_renameargs *arg = msg->rpc_argp;
2737 struct nfs_renameres *res = msg->rpc_resp;
2739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2740 arg->bitmask = server->attr_bitmask;
2741 res->server = server;
2744 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2745 struct inode *new_dir)
2747 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2749 if (!nfs4_sequence_done(task, &res->seq_res))
2751 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2754 update_changeattr(old_dir, &res->old_cinfo);
2755 nfs_post_op_update_inode(old_dir, res->old_fattr);
2756 update_changeattr(new_dir, &res->new_cinfo);
2757 nfs_post_op_update_inode(new_dir, res->new_fattr);
2761 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2762 struct inode *new_dir, struct qstr *new_name)
2764 struct nfs_server *server = NFS_SERVER(old_dir);
2765 struct nfs_renameargs arg = {
2766 .old_dir = NFS_FH(old_dir),
2767 .new_dir = NFS_FH(new_dir),
2768 .old_name = old_name,
2769 .new_name = new_name,
2770 .bitmask = server->attr_bitmask,
2772 struct nfs_renameres res = {
2775 struct rpc_message msg = {
2776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2780 int status = -ENOMEM;
2782 res.old_fattr = nfs_alloc_fattr();
2783 res.new_fattr = nfs_alloc_fattr();
2784 if (res.old_fattr == NULL || res.new_fattr == NULL)
2787 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2789 update_changeattr(old_dir, &res.old_cinfo);
2790 nfs_post_op_update_inode(old_dir, res.old_fattr);
2791 update_changeattr(new_dir, &res.new_cinfo);
2792 nfs_post_op_update_inode(new_dir, res.new_fattr);
2795 nfs_free_fattr(res.new_fattr);
2796 nfs_free_fattr(res.old_fattr);
2800 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2801 struct inode *new_dir, struct qstr *new_name)
2803 struct nfs4_exception exception = { };
2806 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2807 _nfs4_proc_rename(old_dir, old_name,
2810 } while (exception.retry);
2814 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2816 struct nfs_server *server = NFS_SERVER(inode);
2817 struct nfs4_link_arg arg = {
2818 .fh = NFS_FH(inode),
2819 .dir_fh = NFS_FH(dir),
2821 .bitmask = server->attr_bitmask,
2823 struct nfs4_link_res res = {
2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2831 int status = -ENOMEM;
2833 res.fattr = nfs_alloc_fattr();
2834 res.dir_attr = nfs_alloc_fattr();
2835 if (res.fattr == NULL || res.dir_attr == NULL)
2838 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2840 update_changeattr(dir, &res.cinfo);
2841 nfs_post_op_update_inode(dir, res.dir_attr);
2842 nfs_post_op_update_inode(inode, res.fattr);
2845 nfs_free_fattr(res.dir_attr);
2846 nfs_free_fattr(res.fattr);
2850 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2852 struct nfs4_exception exception = { };
2855 err = nfs4_handle_exception(NFS_SERVER(inode),
2856 _nfs4_proc_link(inode, dir, name),
2858 } while (exception.retry);
2862 struct nfs4_createdata {
2863 struct rpc_message msg;
2864 struct nfs4_create_arg arg;
2865 struct nfs4_create_res res;
2867 struct nfs_fattr fattr;
2868 struct nfs_fattr dir_fattr;
2871 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2872 struct qstr *name, struct iattr *sattr, u32 ftype)
2874 struct nfs4_createdata *data;
2876 data = kzalloc(sizeof(*data), GFP_KERNEL);
2878 struct nfs_server *server = NFS_SERVER(dir);
2880 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2881 data->msg.rpc_argp = &data->arg;
2882 data->msg.rpc_resp = &data->res;
2883 data->arg.dir_fh = NFS_FH(dir);
2884 data->arg.server = server;
2885 data->arg.name = name;
2886 data->arg.attrs = sattr;
2887 data->arg.ftype = ftype;
2888 data->arg.bitmask = server->attr_bitmask;
2889 data->res.server = server;
2890 data->res.fh = &data->fh;
2891 data->res.fattr = &data->fattr;
2892 data->res.dir_fattr = &data->dir_fattr;
2893 nfs_fattr_init(data->res.fattr);
2894 nfs_fattr_init(data->res.dir_fattr);
2899 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2901 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2902 &data->arg.seq_args, &data->res.seq_res, 1);
2904 update_changeattr(dir, &data->res.dir_cinfo);
2905 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2906 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2911 static void nfs4_free_createdata(struct nfs4_createdata *data)
2916 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2917 struct page *page, unsigned int len, struct iattr *sattr)
2919 struct nfs4_createdata *data;
2920 int status = -ENAMETOOLONG;
2922 if (len > NFS4_MAXPATHLEN)
2926 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2930 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2931 data->arg.u.symlink.pages = &page;
2932 data->arg.u.symlink.len = len;
2934 status = nfs4_do_create(dir, dentry, data);
2936 nfs4_free_createdata(data);
2941 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2942 struct page *page, unsigned int len, struct iattr *sattr)
2944 struct nfs4_exception exception = { };
2947 err = nfs4_handle_exception(NFS_SERVER(dir),
2948 _nfs4_proc_symlink(dir, dentry, page,
2951 } while (exception.retry);
2955 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2956 struct iattr *sattr)
2958 struct nfs4_createdata *data;
2959 int status = -ENOMEM;
2961 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2965 status = nfs4_do_create(dir, dentry, data);
2967 nfs4_free_createdata(data);
2972 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2973 struct iattr *sattr)
2975 struct nfs4_exception exception = { };
2978 sattr->ia_mode &= ~current_umask();
2980 err = nfs4_handle_exception(NFS_SERVER(dir),
2981 _nfs4_proc_mkdir(dir, dentry, sattr),
2983 } while (exception.retry);
2987 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2988 u64 cookie, struct page **pages, unsigned int count, int plus)
2990 struct inode *dir = dentry->d_inode;
2991 struct nfs4_readdir_arg args = {
2996 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2999 struct nfs4_readdir_res res;
3000 struct rpc_message msg = {
3001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3008 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3009 dentry->d_parent->d_name.name,
3010 dentry->d_name.name,
3011 (unsigned long long)cookie);
3012 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3013 res.pgbase = args.pgbase;
3014 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3016 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3017 status += args.pgbase;
3020 nfs_invalidate_atime(dir);
3022 dprintk("%s: returns %d\n", __func__, status);
3026 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3027 u64 cookie, struct page **pages, unsigned int count, int plus)
3029 struct nfs4_exception exception = { };
3032 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3033 _nfs4_proc_readdir(dentry, cred, cookie,
3034 pages, count, plus),
3036 } while (exception.retry);
3040 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3041 struct iattr *sattr, dev_t rdev)
3043 struct nfs4_createdata *data;
3044 int mode = sattr->ia_mode;
3045 int status = -ENOMEM;
3047 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3048 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3050 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3055 data->arg.ftype = NF4FIFO;
3056 else if (S_ISBLK(mode)) {
3057 data->arg.ftype = NF4BLK;
3058 data->arg.u.device.specdata1 = MAJOR(rdev);
3059 data->arg.u.device.specdata2 = MINOR(rdev);
3061 else if (S_ISCHR(mode)) {
3062 data->arg.ftype = NF4CHR;
3063 data->arg.u.device.specdata1 = MAJOR(rdev);
3064 data->arg.u.device.specdata2 = MINOR(rdev);
3067 status = nfs4_do_create(dir, dentry, data);
3069 nfs4_free_createdata(data);
3074 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3075 struct iattr *sattr, dev_t rdev)
3077 struct nfs4_exception exception = { };
3080 sattr->ia_mode &= ~current_umask();
3082 err = nfs4_handle_exception(NFS_SERVER(dir),
3083 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3085 } while (exception.retry);
3089 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3090 struct nfs_fsstat *fsstat)
3092 struct nfs4_statfs_arg args = {
3094 .bitmask = server->attr_bitmask,
3096 struct nfs4_statfs_res res = {
3099 struct rpc_message msg = {
3100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3105 nfs_fattr_init(fsstat->fattr);
3106 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3109 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3111 struct nfs4_exception exception = { };
3114 err = nfs4_handle_exception(server,
3115 _nfs4_proc_statfs(server, fhandle, fsstat),
3117 } while (exception.retry);
3121 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3122 struct nfs_fsinfo *fsinfo)
3124 struct nfs4_fsinfo_arg args = {
3126 .bitmask = server->attr_bitmask,
3128 struct nfs4_fsinfo_res res = {
3131 struct rpc_message msg = {
3132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3137 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3140 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3142 struct nfs4_exception exception = { };
3146 err = nfs4_handle_exception(server,
3147 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3149 } while (exception.retry);
3153 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3155 nfs_fattr_init(fsinfo->fattr);
3156 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3159 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3160 struct nfs_pathconf *pathconf)
3162 struct nfs4_pathconf_arg args = {
3164 .bitmask = server->attr_bitmask,
3166 struct nfs4_pathconf_res res = {
3167 .pathconf = pathconf,
3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3175 /* None of the pathconf attributes are mandatory to implement */
3176 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3177 memset(pathconf, 0, sizeof(*pathconf));
3181 nfs_fattr_init(pathconf->fattr);
3182 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3185 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3186 struct nfs_pathconf *pathconf)
3188 struct nfs4_exception exception = { };
3192 err = nfs4_handle_exception(server,
3193 _nfs4_proc_pathconf(server, fhandle, pathconf),
3195 } while (exception.retry);
3199 void __nfs4_read_done_cb(struct nfs_read_data *data)
3201 nfs_invalidate_atime(data->inode);
3204 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3206 struct nfs_server *server = NFS_SERVER(data->inode);
3208 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3209 rpc_restart_call_prepare(task);
3213 __nfs4_read_done_cb(data);
3214 if (task->tk_status > 0)
3215 renew_lease(server, data->timestamp);
3219 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3222 dprintk("--> %s\n", __func__);
3224 if (!nfs4_sequence_done(task, &data->res.seq_res))
3227 return data->read_done_cb ? data->read_done_cb(task, data) :
3228 nfs4_read_done_cb(task, data);
3231 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3233 data->timestamp = jiffies;
3234 data->read_done_cb = nfs4_read_done_cb;
3235 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3238 /* Reset the the nfs_read_data to send the read to the MDS. */
3239 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3241 dprintk("%s Reset task for i/o through\n", __func__);
3242 put_lseg(data->lseg);
3244 /* offsets will differ in the dense stripe case */
3245 data->args.offset = data->mds_offset;
3246 data->ds_clp = NULL;
3247 data->args.fh = NFS_FH(data->inode);
3248 data->read_done_cb = nfs4_read_done_cb;
3249 task->tk_ops = data->mds_ops;
3250 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3252 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3254 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3256 struct inode *inode = data->inode;
3258 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3259 rpc_restart_call_prepare(task);
3262 if (task->tk_status >= 0) {
3263 renew_lease(NFS_SERVER(inode), data->timestamp);
3264 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3269 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3271 if (!nfs4_sequence_done(task, &data->res.seq_res))
3273 return data->write_done_cb ? data->write_done_cb(task, data) :
3274 nfs4_write_done_cb(task, data);
3277 /* Reset the the nfs_write_data to send the write to the MDS. */
3278 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3280 dprintk("%s Reset task for i/o through\n", __func__);
3281 put_lseg(data->lseg);
3283 data->ds_clp = NULL;
3284 data->write_done_cb = nfs4_write_done_cb;
3285 data->args.fh = NFS_FH(data->inode);
3286 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3287 data->args.offset = data->mds_offset;
3288 data->res.fattr = &data->fattr;
3289 task->tk_ops = data->mds_ops;
3290 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3292 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3294 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3296 struct nfs_server *server = NFS_SERVER(data->inode);
3299 data->args.bitmask = NULL;
3300 data->res.fattr = NULL;
3302 data->args.bitmask = server->cache_consistency_bitmask;
3303 if (!data->write_done_cb)
3304 data->write_done_cb = nfs4_write_done_cb;
3305 data->res.server = server;
3306 data->timestamp = jiffies;
3308 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3311 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3313 struct inode *inode = data->inode;
3315 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3316 rpc_restart_call_prepare(task);
3319 nfs_refresh_inode(inode, data->res.fattr);
3323 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3325 if (!nfs4_sequence_done(task, &data->res.seq_res))
3327 return data->write_done_cb(task, data);
3330 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3332 struct nfs_server *server = NFS_SERVER(data->inode);
3335 data->args.bitmask = NULL;
3336 data->res.fattr = NULL;
3338 data->args.bitmask = server->cache_consistency_bitmask;
3339 if (!data->write_done_cb)
3340 data->write_done_cb = nfs4_commit_done_cb;
3341 data->res.server = server;
3342 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3345 struct nfs4_renewdata {
3346 struct nfs_client *client;
3347 unsigned long timestamp;
3351 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3352 * standalone procedure for queueing an asynchronous RENEW.
3354 static void nfs4_renew_release(void *calldata)
3356 struct nfs4_renewdata *data = calldata;
3357 struct nfs_client *clp = data->client;
3359 if (atomic_read(&clp->cl_count) > 1)
3360 nfs4_schedule_state_renewal(clp);
3361 nfs_put_client(clp);
3365 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3367 struct nfs4_renewdata *data = calldata;
3368 struct nfs_client *clp = data->client;
3369 unsigned long timestamp = data->timestamp;
3371 if (task->tk_status < 0) {
3372 /* Unless we're shutting down, schedule state recovery! */
3373 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3375 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3376 nfs4_schedule_lease_recovery(clp);
3379 nfs4_schedule_path_down_recovery(clp);
3381 do_renew_lease(clp, timestamp);
3384 static const struct rpc_call_ops nfs4_renew_ops = {
3385 .rpc_call_done = nfs4_renew_done,
3386 .rpc_release = nfs4_renew_release,
3389 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3391 struct rpc_message msg = {
3392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3396 struct nfs4_renewdata *data;
3398 if (renew_flags == 0)
3400 if (!atomic_inc_not_zero(&clp->cl_count))
3402 data = kmalloc(sizeof(*data), GFP_NOFS);
3406 data->timestamp = jiffies;
3407 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3408 &nfs4_renew_ops, data);
3411 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3413 struct rpc_message msg = {
3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3418 unsigned long now = jiffies;
3421 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3424 do_renew_lease(clp, now);
3428 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3430 return (server->caps & NFS_CAP_ACLS)
3431 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3432 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3435 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3436 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3439 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3441 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3442 struct page **pages, unsigned int *pgbase)
3444 struct page *newpage, **spages;
3450 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3451 newpage = alloc_page(GFP_KERNEL);
3453 if (newpage == NULL)
3455 memcpy(page_address(newpage), buf, len);
3460 } while (buflen != 0);
3466 __free_page(spages[rc-1]);
3470 struct nfs4_cached_acl {
3476 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3478 struct nfs_inode *nfsi = NFS_I(inode);
3480 spin_lock(&inode->i_lock);
3481 kfree(nfsi->nfs4_acl);
3482 nfsi->nfs4_acl = acl;
3483 spin_unlock(&inode->i_lock);
3486 static void nfs4_zap_acl_attr(struct inode *inode)
3488 nfs4_set_cached_acl(inode, NULL);
3491 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3493 struct nfs_inode *nfsi = NFS_I(inode);
3494 struct nfs4_cached_acl *acl;
3497 spin_lock(&inode->i_lock);
3498 acl = nfsi->nfs4_acl;
3501 if (buf == NULL) /* user is just asking for length */
3503 if (acl->cached == 0)
3505 ret = -ERANGE; /* see getxattr(2) man page */
3506 if (acl->len > buflen)
3508 memcpy(buf, acl->data, acl->len);
3512 spin_unlock(&inode->i_lock);
3516 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3518 struct nfs4_cached_acl *acl;
3520 if (buf && acl_len <= PAGE_SIZE) {
3521 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3525 memcpy(acl->data, buf, acl_len);
3527 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3534 nfs4_set_cached_acl(inode, acl);
3538 * The getxattr API returns the required buffer length when called with a
3539 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3540 * the required buf. On a NULL buf, we send a page of data to the server
3541 * guessing that the ACL request can be serviced by a page. If so, we cache
3542 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3543 * the cache. If not so, we throw away the page, and cache the required
3544 * length. The next getxattr call will then produce another round trip to
3545 * the server, this time with the input buf of the required size.
3547 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3549 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3550 struct nfs_getaclargs args = {
3551 .fh = NFS_FH(inode),
3555 struct nfs_getaclres res = {
3559 struct rpc_message msg = {
3560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3564 int ret = -ENOMEM, npages, i, acl_len = 0;
3566 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3567 /* As long as we're doing a round trip to the server anyway,
3568 * let's be prepared for a page of acl data. */
3572 for (i = 0; i < npages; i++) {
3573 pages[i] = alloc_page(GFP_KERNEL);
3578 /* for decoding across pages */
3579 args.acl_scratch = alloc_page(GFP_KERNEL);
3580 if (!args.acl_scratch)
3583 args.acl_len = npages * PAGE_SIZE;
3584 args.acl_pgbase = 0;
3585 /* Let decode_getfacl know not to fail if the ACL data is larger than
3586 * the page we send as a guess */
3588 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3589 resp_buf = page_address(pages[0]);
3591 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3592 __func__, buf, buflen, npages, args.acl_len);
3593 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3594 &msg, &args.seq_args, &res.seq_res, 0);
3598 acl_len = res.acl_len - res.acl_data_offset;
3599 if (acl_len > args.acl_len)
3600 nfs4_write_cached_acl(inode, NULL, acl_len);
3602 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3606 if (acl_len > buflen)
3608 _copy_from_pages(buf, pages, res.acl_data_offset,
3613 for (i = 0; i < npages; i++)
3615 __free_page(pages[i]);
3616 if (args.acl_scratch)
3617 __free_page(args.acl_scratch);
3621 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3623 struct nfs4_exception exception = { };
3626 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3629 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3630 } while (exception.retry);
3634 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3636 struct nfs_server *server = NFS_SERVER(inode);
3639 if (!nfs4_server_supports_acls(server))
3641 ret = nfs_revalidate_inode(server, inode);
3644 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3645 nfs_zap_acl_cache(inode);
3646 ret = nfs4_read_cached_acl(inode, buf, buflen);
3648 /* -ENOENT is returned if there is no ACL or if there is an ACL
3649 * but no cached acl data, just the acl length */
3651 return nfs4_get_acl_uncached(inode, buf, buflen);
3654 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3656 struct nfs_server *server = NFS_SERVER(inode);
3657 struct page *pages[NFS4ACL_MAXPAGES];
3658 struct nfs_setaclargs arg = {
3659 .fh = NFS_FH(inode),
3663 struct nfs_setaclres res;
3664 struct rpc_message msg = {
3665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3671 if (!nfs4_server_supports_acls(server))
3673 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3676 nfs_inode_return_delegation(inode);
3677 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3680 * Free each page after tx, so the only ref left is
3681 * held by the network stack
3684 put_page(pages[i-1]);
3687 * Acl update can result in inode attribute update.
3688 * so mark the attribute cache invalid.
3690 spin_lock(&inode->i_lock);
3691 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3692 spin_unlock(&inode->i_lock);
3693 nfs_access_zap_cache(inode);
3694 nfs_zap_acl_cache(inode);
3698 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3700 struct nfs4_exception exception = { };
3703 err = nfs4_handle_exception(NFS_SERVER(inode),
3704 __nfs4_proc_set_acl(inode, buf, buflen),
3706 } while (exception.retry);
3711 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3713 struct nfs_client *clp = server->nfs_client;
3715 if (task->tk_status >= 0)
3717 switch(task->tk_status) {
3718 case -NFS4ERR_ADMIN_REVOKED:
3719 case -NFS4ERR_BAD_STATEID:
3720 case -NFS4ERR_OPENMODE:
3723 nfs4_schedule_stateid_recovery(server, state);
3724 goto wait_on_recovery;
3725 case -NFS4ERR_EXPIRED:
3727 nfs4_schedule_stateid_recovery(server, state);
3728 case -NFS4ERR_STALE_STATEID:
3729 case -NFS4ERR_STALE_CLIENTID:
3730 nfs4_schedule_lease_recovery(clp);
3731 goto wait_on_recovery;
3732 #if defined(CONFIG_NFS_V4_1)
3733 case -NFS4ERR_BADSESSION:
3734 case -NFS4ERR_BADSLOT:
3735 case -NFS4ERR_BAD_HIGH_SLOT:
3736 case -NFS4ERR_DEADSESSION:
3737 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3738 case -NFS4ERR_SEQ_FALSE_RETRY:
3739 case -NFS4ERR_SEQ_MISORDERED:
3740 dprintk("%s ERROR %d, Reset session\n", __func__,
3742 nfs4_schedule_session_recovery(clp->cl_session);
3743 task->tk_status = 0;
3745 #endif /* CONFIG_NFS_V4_1 */
3746 case -NFS4ERR_DELAY:
3747 nfs_inc_server_stats(server, NFSIOS_DELAY);
3748 case -NFS4ERR_GRACE:
3750 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3751 task->tk_status = 0;
3753 case -NFS4ERR_RETRY_UNCACHED_REP:
3754 case -NFS4ERR_OLD_STATEID:
3755 task->tk_status = 0;
3758 task->tk_status = nfs4_map_errors(task->tk_status);
3761 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3762 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3763 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3764 task->tk_status = 0;
3768 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3769 unsigned short port, struct rpc_cred *cred,
3770 struct nfs4_setclientid_res *res)
3772 nfs4_verifier sc_verifier;
3773 struct nfs4_setclientid setclientid = {
3774 .sc_verifier = &sc_verifier,
3776 .sc_cb_ident = clp->cl_cb_ident,
3778 struct rpc_message msg = {
3779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3780 .rpc_argp = &setclientid,
3788 p = (__be32*)sc_verifier.data;
3789 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3790 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3793 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3794 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3796 rpc_peeraddr2str(clp->cl_rpcclient,
3798 rpc_peeraddr2str(clp->cl_rpcclient,
3800 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3801 clp->cl_id_uniquifier);
3802 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3803 sizeof(setclientid.sc_netid),
3804 rpc_peeraddr2str(clp->cl_rpcclient,
3805 RPC_DISPLAY_NETID));
3806 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3807 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3808 clp->cl_ipaddr, port >> 8, port & 255);
3810 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3811 if (status != -NFS4ERR_CLID_INUSE)
3814 ++clp->cl_id_uniquifier;
3818 ssleep(clp->cl_lease_time / HZ + 1);
3823 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3824 struct nfs4_setclientid_res *arg,
3825 struct rpc_cred *cred)
3827 struct nfs_fsinfo fsinfo;
3828 struct rpc_message msg = {
3829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3831 .rpc_resp = &fsinfo,
3838 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3840 spin_lock(&clp->cl_lock);
3841 clp->cl_lease_time = fsinfo.lease_time * HZ;
3842 clp->cl_last_renewal = now;
3843 spin_unlock(&clp->cl_lock);
3848 struct nfs4_delegreturndata {
3849 struct nfs4_delegreturnargs args;
3850 struct nfs4_delegreturnres res;
3852 nfs4_stateid stateid;
3853 unsigned long timestamp;
3854 struct nfs_fattr fattr;
3858 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3860 struct nfs4_delegreturndata *data = calldata;
3862 if (!nfs4_sequence_done(task, &data->res.seq_res))
3865 switch (task->tk_status) {
3866 case -NFS4ERR_STALE_STATEID:
3867 case -NFS4ERR_EXPIRED:
3869 renew_lease(data->res.server, data->timestamp);
3872 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3874 rpc_restart_call_prepare(task);
3878 data->rpc_status = task->tk_status;
3881 static void nfs4_delegreturn_release(void *calldata)
3886 #if defined(CONFIG_NFS_V4_1)
3887 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3889 struct nfs4_delegreturndata *d_data;
3891 d_data = (struct nfs4_delegreturndata *)data;
3893 if (nfs4_setup_sequence(d_data->res.server,
3894 &d_data->args.seq_args,
3895 &d_data->res.seq_res, 1, task))
3897 rpc_call_start(task);
3899 #endif /* CONFIG_NFS_V4_1 */
3901 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3902 #if defined(CONFIG_NFS_V4_1)
3903 .rpc_call_prepare = nfs4_delegreturn_prepare,
3904 #endif /* CONFIG_NFS_V4_1 */
3905 .rpc_call_done = nfs4_delegreturn_done,
3906 .rpc_release = nfs4_delegreturn_release,
3909 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3911 struct nfs4_delegreturndata *data;
3912 struct nfs_server *server = NFS_SERVER(inode);
3913 struct rpc_task *task;
3914 struct rpc_message msg = {
3915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3918 struct rpc_task_setup task_setup_data = {
3919 .rpc_client = server->client,
3920 .rpc_message = &msg,
3921 .callback_ops = &nfs4_delegreturn_ops,
3922 .flags = RPC_TASK_ASYNC,
3926 data = kzalloc(sizeof(*data), GFP_NOFS);
3929 data->args.fhandle = &data->fh;
3930 data->args.stateid = &data->stateid;
3931 data->args.bitmask = server->attr_bitmask;
3932 nfs_copy_fh(&data->fh, NFS_FH(inode));
3933 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3934 data->res.fattr = &data->fattr;
3935 data->res.server = server;
3936 nfs_fattr_init(data->res.fattr);
3937 data->timestamp = jiffies;
3938 data->rpc_status = 0;
3940 task_setup_data.callback_data = data;
3941 msg.rpc_argp = &data->args;
3942 msg.rpc_resp = &data->res;
3943 task = rpc_run_task(&task_setup_data);
3945 return PTR_ERR(task);
3948 status = nfs4_wait_for_completion_rpc_task(task);
3951 status = data->rpc_status;
3954 nfs_refresh_inode(inode, &data->fattr);
3960 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3962 struct nfs_server *server = NFS_SERVER(inode);
3963 struct nfs4_exception exception = { };
3966 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3968 case -NFS4ERR_STALE_STATEID:
3969 case -NFS4ERR_EXPIRED:
3973 err = nfs4_handle_exception(server, err, &exception);
3974 } while (exception.retry);
3978 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3979 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3982 * sleep, with exponential backoff, and retry the LOCK operation.
3984 static unsigned long
3985 nfs4_set_lock_task_retry(unsigned long timeout)
3987 freezable_schedule_timeout_killable(timeout);
3989 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3990 return NFS4_LOCK_MAXTIMEOUT;
3994 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3996 struct inode *inode = state->inode;
3997 struct nfs_server *server = NFS_SERVER(inode);
3998 struct nfs_client *clp = server->nfs_client;
3999 struct nfs_lockt_args arg = {
4000 .fh = NFS_FH(inode),
4003 struct nfs_lockt_res res = {
4006 struct rpc_message msg = {
4007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4010 .rpc_cred = state->owner->so_cred,
4012 struct nfs4_lock_state *lsp;
4015 arg.lock_owner.clientid = clp->cl_clientid;
4016 status = nfs4_set_lock_state(state, request);
4019 lsp = request->fl_u.nfs4_fl.owner;
4020 arg.lock_owner.id = lsp->ls_id.id;
4021 arg.lock_owner.s_dev = server->s_dev;
4022 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4025 request->fl_type = F_UNLCK;
4027 case -NFS4ERR_DENIED:
4030 request->fl_ops->fl_release_private(request);
4035 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4037 struct nfs4_exception exception = { };
4041 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4042 _nfs4_proc_getlk(state, cmd, request),
4044 } while (exception.retry);
4048 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4051 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4053 res = posix_lock_file_wait(file, fl);
4056 res = flock_lock_file_wait(file, fl);
4064 struct nfs4_unlockdata {
4065 struct nfs_locku_args arg;
4066 struct nfs_locku_res res;
4067 struct nfs4_lock_state *lsp;
4068 struct nfs_open_context *ctx;
4069 struct file_lock fl;
4070 const struct nfs_server *server;
4071 unsigned long timestamp;
4074 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4075 struct nfs_open_context *ctx,
4076 struct nfs4_lock_state *lsp,
4077 struct nfs_seqid *seqid)
4079 struct nfs4_unlockdata *p;
4080 struct inode *inode = lsp->ls_state->inode;
4082 p = kzalloc(sizeof(*p), GFP_NOFS);
4085 p->arg.fh = NFS_FH(inode);
4087 p->arg.seqid = seqid;
4088 p->res.seqid = seqid;
4089 p->arg.stateid = &lsp->ls_stateid;
4091 atomic_inc(&lsp->ls_count);
4092 /* Ensure we don't close file until we're done freeing locks! */
4093 p->ctx = get_nfs_open_context(ctx);
4094 memcpy(&p->fl, fl, sizeof(p->fl));
4095 p->server = NFS_SERVER(inode);
4099 static void nfs4_locku_release_calldata(void *data)
4101 struct nfs4_unlockdata *calldata = data;
4102 nfs_free_seqid(calldata->arg.seqid);
4103 nfs4_put_lock_state(calldata->lsp);
4104 put_nfs_open_context(calldata->ctx);
4108 static void nfs4_locku_done(struct rpc_task *task, void *data)
4110 struct nfs4_unlockdata *calldata = data;
4112 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4114 switch (task->tk_status) {
4116 memcpy(calldata->lsp->ls_stateid.data,
4117 calldata->res.stateid.data,
4118 sizeof(calldata->lsp->ls_stateid.data));
4119 renew_lease(calldata->server, calldata->timestamp);
4121 case -NFS4ERR_BAD_STATEID:
4122 case -NFS4ERR_OLD_STATEID:
4123 case -NFS4ERR_STALE_STATEID:
4124 case -NFS4ERR_EXPIRED:
4127 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4128 rpc_restart_call_prepare(task);
4132 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4134 struct nfs4_unlockdata *calldata = data;
4136 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4138 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4139 /* Note: exit _without_ running nfs4_locku_done */
4140 task->tk_action = NULL;
4143 calldata->timestamp = jiffies;
4144 if (nfs4_setup_sequence(calldata->server,
4145 &calldata->arg.seq_args,
4146 &calldata->res.seq_res, 1, task))
4148 rpc_call_start(task);
4151 static const struct rpc_call_ops nfs4_locku_ops = {
4152 .rpc_call_prepare = nfs4_locku_prepare,
4153 .rpc_call_done = nfs4_locku_done,
4154 .rpc_release = nfs4_locku_release_calldata,
4157 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4158 struct nfs_open_context *ctx,
4159 struct nfs4_lock_state *lsp,
4160 struct nfs_seqid *seqid)
4162 struct nfs4_unlockdata *data;
4163 struct rpc_message msg = {
4164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4165 .rpc_cred = ctx->cred,
4167 struct rpc_task_setup task_setup_data = {
4168 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4169 .rpc_message = &msg,
4170 .callback_ops = &nfs4_locku_ops,
4171 .workqueue = nfsiod_workqueue,
4172 .flags = RPC_TASK_ASYNC,
4175 /* Ensure this is an unlock - when canceling a lock, the
4176 * canceled lock is passed in, and it won't be an unlock.
4178 fl->fl_type = F_UNLCK;
4180 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4182 nfs_free_seqid(seqid);
4183 return ERR_PTR(-ENOMEM);
4186 msg.rpc_argp = &data->arg;
4187 msg.rpc_resp = &data->res;
4188 task_setup_data.callback_data = data;
4189 return rpc_run_task(&task_setup_data);
4192 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4194 struct nfs_inode *nfsi = NFS_I(state->inode);
4195 struct nfs_seqid *seqid;
4196 struct nfs4_lock_state *lsp;
4197 struct rpc_task *task;
4199 unsigned char fl_flags = request->fl_flags;
4201 status = nfs4_set_lock_state(state, request);
4202 /* Unlock _before_ we do the RPC call */
4203 request->fl_flags |= FL_EXISTS;
4204 down_read(&nfsi->rwsem);
4205 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4206 up_read(&nfsi->rwsem);
4209 up_read(&nfsi->rwsem);
4212 /* Is this a delegated lock? */
4213 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4215 lsp = request->fl_u.nfs4_fl.owner;
4216 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4220 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4221 status = PTR_ERR(task);
4224 status = nfs4_wait_for_completion_rpc_task(task);
4227 request->fl_flags = fl_flags;
4231 struct nfs4_lockdata {
4232 struct nfs_lock_args arg;
4233 struct nfs_lock_res res;
4234 struct nfs4_lock_state *lsp;
4235 struct nfs_open_context *ctx;
4236 struct file_lock fl;
4237 unsigned long timestamp;
4240 struct nfs_server *server;
4243 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4244 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4247 struct nfs4_lockdata *p;
4248 struct inode *inode = lsp->ls_state->inode;
4249 struct nfs_server *server = NFS_SERVER(inode);
4251 p = kzalloc(sizeof(*p), gfp_mask);
4255 p->arg.fh = NFS_FH(inode);
4257 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4258 if (p->arg.open_seqid == NULL)
4260 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4261 if (p->arg.lock_seqid == NULL)
4262 goto out_free_seqid;
4263 p->arg.lock_stateid = &lsp->ls_stateid;
4264 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4265 p->arg.lock_owner.id = lsp->ls_id.id;
4266 p->arg.lock_owner.s_dev = server->s_dev;
4267 p->res.lock_seqid = p->arg.lock_seqid;
4270 atomic_inc(&lsp->ls_count);
4271 p->ctx = get_nfs_open_context(ctx);
4272 memcpy(&p->fl, fl, sizeof(p->fl));
4275 nfs_free_seqid(p->arg.open_seqid);
4281 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4283 struct nfs4_lockdata *data = calldata;
4284 struct nfs4_state *state = data->lsp->ls_state;
4286 dprintk("%s: begin!\n", __func__);
4287 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4289 /* Do we need to do an open_to_lock_owner? */
4290 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4291 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4293 data->arg.open_stateid = &state->stateid;
4294 data->arg.new_lock_owner = 1;
4295 data->res.open_seqid = data->arg.open_seqid;
4297 data->arg.new_lock_owner = 0;
4298 data->timestamp = jiffies;
4299 if (nfs4_setup_sequence(data->server,
4300 &data->arg.seq_args,
4301 &data->res.seq_res, 1, task))
4303 rpc_call_start(task);
4304 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4307 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4309 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4310 nfs4_lock_prepare(task, calldata);
4313 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4315 struct nfs4_lockdata *data = calldata;
4317 dprintk("%s: begin!\n", __func__);
4319 if (!nfs4_sequence_done(task, &data->res.seq_res))
4322 data->rpc_status = task->tk_status;
4323 if (data->arg.new_lock_owner != 0) {
4324 if (data->rpc_status == 0)
4325 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4329 if (data->rpc_status == 0) {
4330 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4331 sizeof(data->lsp->ls_stateid.data));
4332 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4333 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4336 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4339 static void nfs4_lock_release(void *calldata)
4341 struct nfs4_lockdata *data = calldata;
4343 dprintk("%s: begin!\n", __func__);
4344 nfs_free_seqid(data->arg.open_seqid);
4345 if (data->cancelled != 0) {
4346 struct rpc_task *task;
4347 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4348 data->arg.lock_seqid);
4350 rpc_put_task_async(task);
4351 dprintk("%s: cancelling lock!\n", __func__);
4353 nfs_free_seqid(data->arg.lock_seqid);
4354 nfs4_put_lock_state(data->lsp);
4355 put_nfs_open_context(data->ctx);
4357 dprintk("%s: done!\n", __func__);
4360 static const struct rpc_call_ops nfs4_lock_ops = {
4361 .rpc_call_prepare = nfs4_lock_prepare,
4362 .rpc_call_done = nfs4_lock_done,
4363 .rpc_release = nfs4_lock_release,
4366 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4367 .rpc_call_prepare = nfs4_recover_lock_prepare,
4368 .rpc_call_done = nfs4_lock_done,
4369 .rpc_release = nfs4_lock_release,
4372 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4375 case -NFS4ERR_ADMIN_REVOKED:
4376 case -NFS4ERR_BAD_STATEID:
4377 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4378 if (new_lock_owner != 0 ||
4379 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4380 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4382 case -NFS4ERR_STALE_STATEID:
4383 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4384 case -NFS4ERR_EXPIRED:
4385 nfs4_schedule_lease_recovery(server->nfs_client);
4389 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4391 struct nfs4_lockdata *data;
4392 struct rpc_task *task;
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4395 .rpc_cred = state->owner->so_cred,
4397 struct rpc_task_setup task_setup_data = {
4398 .rpc_client = NFS_CLIENT(state->inode),
4399 .rpc_message = &msg,
4400 .callback_ops = &nfs4_lock_ops,
4401 .workqueue = nfsiod_workqueue,
4402 .flags = RPC_TASK_ASYNC,
4406 dprintk("%s: begin!\n", __func__);
4407 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4408 fl->fl_u.nfs4_fl.owner,
4409 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4413 data->arg.block = 1;
4414 if (recovery_type > NFS_LOCK_NEW) {
4415 if (recovery_type == NFS_LOCK_RECLAIM)
4416 data->arg.reclaim = NFS_LOCK_RECLAIM;
4417 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4419 msg.rpc_argp = &data->arg;
4420 msg.rpc_resp = &data->res;
4421 task_setup_data.callback_data = data;
4422 task = rpc_run_task(&task_setup_data);
4424 return PTR_ERR(task);
4425 ret = nfs4_wait_for_completion_rpc_task(task);
4427 ret = data->rpc_status;
4429 nfs4_handle_setlk_error(data->server, data->lsp,
4430 data->arg.new_lock_owner, ret);
4432 data->cancelled = 1;
4434 dprintk("%s: done, ret = %d!\n", __func__, ret);
4438 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4440 struct nfs_server *server = NFS_SERVER(state->inode);
4441 struct nfs4_exception exception = { };
4445 /* Cache the lock if possible... */
4446 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4448 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4449 if (err != -NFS4ERR_DELAY)
4451 nfs4_handle_exception(server, err, &exception);
4452 } while (exception.retry);
4456 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4458 struct nfs_server *server = NFS_SERVER(state->inode);
4459 struct nfs4_exception exception = { };
4462 err = nfs4_set_lock_state(state, request);
4466 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4468 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4472 case -NFS4ERR_GRACE:
4473 case -NFS4ERR_DELAY:
4474 nfs4_handle_exception(server, err, &exception);
4477 } while (exception.retry);
4482 #if defined(CONFIG_NFS_V4_1)
4483 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4486 struct nfs_server *server = NFS_SERVER(state->inode);
4488 status = nfs41_test_stateid(server, state);
4489 if (status == NFS_OK)
4491 nfs41_free_stateid(server, state);
4492 return nfs4_lock_expired(state, request);
4496 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4498 struct nfs_inode *nfsi = NFS_I(state->inode);
4499 unsigned char fl_flags = request->fl_flags;
4500 int status = -ENOLCK;
4502 if ((fl_flags & FL_POSIX) &&
4503 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4505 /* Is this a delegated open? */
4506 status = nfs4_set_lock_state(state, request);
4509 request->fl_flags |= FL_ACCESS;
4510 status = do_vfs_lock(request->fl_file, request);
4513 down_read(&nfsi->rwsem);
4514 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4515 /* Yes: cache locks! */
4516 /* ...but avoid races with delegation recall... */
4517 request->fl_flags = fl_flags & ~FL_SLEEP;
4518 status = do_vfs_lock(request->fl_file, request);
4521 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4524 /* Note: we always want to sleep here! */
4525 request->fl_flags = fl_flags | FL_SLEEP;
4526 if (do_vfs_lock(request->fl_file, request) < 0)
4527 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4529 up_read(&nfsi->rwsem);
4531 request->fl_flags = fl_flags;
4535 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4537 struct nfs4_exception exception = { };
4541 err = _nfs4_proc_setlk(state, cmd, request);
4542 if (err == -NFS4ERR_DENIED)
4544 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4546 } while (exception.retry);
4551 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4553 struct nfs_open_context *ctx;
4554 struct nfs4_state *state;
4555 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4558 /* verify open state */
4559 ctx = nfs_file_open_context(filp);
4562 if (request->fl_start < 0 || request->fl_end < 0)
4565 if (IS_GETLK(cmd)) {
4567 return nfs4_proc_getlk(state, F_GETLK, request);
4571 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4574 if (request->fl_type == F_UNLCK) {
4576 return nfs4_proc_unlck(state, cmd, request);
4583 status = nfs4_proc_setlk(state, cmd, request);
4584 if ((status != -EAGAIN) || IS_SETLK(cmd))
4586 timeout = nfs4_set_lock_task_retry(timeout);
4587 status = -ERESTARTSYS;
4590 } while(status < 0);
4594 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4596 struct nfs_server *server = NFS_SERVER(state->inode);
4597 struct nfs4_exception exception = { };
4600 err = nfs4_set_lock_state(state, fl);
4604 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4607 printk(KERN_ERR "%s: unhandled error %d.\n",
4612 case -NFS4ERR_EXPIRED:
4613 nfs4_schedule_stateid_recovery(server, state);
4614 case -NFS4ERR_STALE_CLIENTID:
4615 case -NFS4ERR_STALE_STATEID:
4616 nfs4_schedule_lease_recovery(server->nfs_client);
4618 case -NFS4ERR_BADSESSION:
4619 case -NFS4ERR_BADSLOT:
4620 case -NFS4ERR_BAD_HIGH_SLOT:
4621 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4622 case -NFS4ERR_DEADSESSION:
4623 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4627 * The show must go on: exit, but mark the
4628 * stateid as needing recovery.
4630 case -NFS4ERR_ADMIN_REVOKED:
4631 case -NFS4ERR_BAD_STATEID:
4632 case -NFS4ERR_OPENMODE:
4633 nfs4_schedule_stateid_recovery(server, state);
4638 * User RPCSEC_GSS context has expired.
4639 * We cannot recover this stateid now, so
4640 * skip it and allow recovery thread to
4646 case -NFS4ERR_DENIED:
4647 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4650 case -NFS4ERR_DELAY:
4653 err = nfs4_handle_exception(server, err, &exception);
4654 } while (exception.retry);
4659 static void nfs4_release_lockowner_release(void *calldata)
4664 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4665 .rpc_release = nfs4_release_lockowner_release,
4668 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4670 struct nfs_server *server = lsp->ls_state->owner->so_server;
4671 struct nfs_release_lockowner_args *args;
4672 struct rpc_message msg = {
4673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4676 if (server->nfs_client->cl_mvops->minor_version != 0)
4678 args = kmalloc(sizeof(*args), GFP_NOFS);
4681 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4682 args->lock_owner.id = lsp->ls_id.id;
4683 args->lock_owner.s_dev = server->s_dev;
4684 msg.rpc_argp = args;
4685 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4688 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4690 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4691 const void *buf, size_t buflen,
4692 int flags, int type)
4694 if (strcmp(key, "") != 0)
4697 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4700 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4701 void *buf, size_t buflen, int type)
4703 if (strcmp(key, "") != 0)
4706 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4709 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4710 size_t list_len, const char *name,
4711 size_t name_len, int type)
4713 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4715 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4718 if (list && len <= list_len)
4719 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4724 * nfs_fhget will use either the mounted_on_fileid or the fileid
4726 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4728 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4729 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4730 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4731 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4734 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4735 NFS_ATTR_FATTR_NLINK;
4736 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4740 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4741 struct nfs4_fs_locations *fs_locations, struct page *page)
4743 struct nfs_server *server = NFS_SERVER(dir);
4745 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4747 struct nfs4_fs_locations_arg args = {
4748 .dir_fh = NFS_FH(dir),
4753 struct nfs4_fs_locations_res res = {
4754 .fs_locations = fs_locations,
4756 struct rpc_message msg = {
4757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4763 dprintk("%s: start\n", __func__);
4765 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4766 * is not supported */
4767 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4768 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4770 bitmask[0] |= FATTR4_WORD0_FILEID;
4772 nfs_fattr_init(&fs_locations->fattr);
4773 fs_locations->server = server;
4774 fs_locations->nlocations = 0;
4775 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4776 dprintk("%s: returned status = %d\n", __func__, status);
4780 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4783 struct nfs4_secinfo_arg args = {
4784 .dir_fh = NFS_FH(dir),
4787 struct nfs4_secinfo_res res = {
4790 struct rpc_message msg = {
4791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4796 dprintk("NFS call secinfo %s\n", name->name);
4797 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4798 dprintk("NFS reply secinfo: %d\n", status);
4802 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4804 struct nfs4_exception exception = { };
4807 err = nfs4_handle_exception(NFS_SERVER(dir),
4808 _nfs4_proc_secinfo(dir, name, flavors),
4810 } while (exception.retry);
4814 #ifdef CONFIG_NFS_V4_1
4816 * Check the exchange flags returned by the server for invalid flags, having
4817 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4820 static int nfs4_check_cl_exchange_flags(u32 flags)
4822 if (flags & ~EXCHGID4_FLAG_MASK_R)
4824 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4825 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4827 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4831 return -NFS4ERR_INVAL;
4835 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4837 if (a->server_scope_sz == b->server_scope_sz &&
4838 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4845 * nfs4_proc_exchange_id()
4847 * Since the clientid has expired, all compounds using sessions
4848 * associated with the stale clientid will be returning
4849 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4850 * be in some phase of session reset.
4852 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4854 nfs4_verifier verifier;
4855 struct nfs41_exchange_id_args args = {
4857 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4859 struct nfs41_exchange_id_res res = {
4863 struct rpc_message msg = {
4864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4871 dprintk("--> %s\n", __func__);
4872 BUG_ON(clp == NULL);
4874 p = (u32 *)verifier.data;
4875 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4876 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4877 args.verifier = &verifier;
4879 args.id_len = scnprintf(args.id, sizeof(args.id),
4882 init_utsname()->nodename,
4883 init_utsname()->domainname,
4884 clp->cl_rpcclient->cl_auth->au_flavor);
4886 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4887 if (unlikely(!res.server_scope))
4890 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4892 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4895 if (clp->server_scope &&
4896 !nfs41_same_server_scope(clp->server_scope,
4897 res.server_scope)) {
4898 dprintk("%s: server_scope mismatch detected\n",
4900 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4901 kfree(clp->server_scope);
4902 clp->server_scope = NULL;
4905 if (!clp->server_scope)
4906 clp->server_scope = res.server_scope;
4908 kfree(res.server_scope);
4911 dprintk("<-- %s status= %d\n", __func__, status);
4915 struct nfs4_get_lease_time_data {
4916 struct nfs4_get_lease_time_args *args;
4917 struct nfs4_get_lease_time_res *res;
4918 struct nfs_client *clp;
4921 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4925 struct nfs4_get_lease_time_data *data =
4926 (struct nfs4_get_lease_time_data *)calldata;
4928 dprintk("--> %s\n", __func__);
4929 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4930 /* just setup sequence, do not trigger session recovery
4931 since we're invoked within one */
4932 ret = nfs41_setup_sequence(data->clp->cl_session,
4933 &data->args->la_seq_args,
4934 &data->res->lr_seq_res, 0, task);
4936 BUG_ON(ret == -EAGAIN);
4937 rpc_call_start(task);
4938 dprintk("<-- %s\n", __func__);
4942 * Called from nfs4_state_manager thread for session setup, so don't recover
4943 * from sequence operation or clientid errors.
4945 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4947 struct nfs4_get_lease_time_data *data =
4948 (struct nfs4_get_lease_time_data *)calldata;
4950 dprintk("--> %s\n", __func__);
4951 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4953 switch (task->tk_status) {
4954 case -NFS4ERR_DELAY:
4955 case -NFS4ERR_GRACE:
4956 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4957 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4958 task->tk_status = 0;
4960 case -NFS4ERR_RETRY_UNCACHED_REP:
4961 rpc_restart_call_prepare(task);
4964 dprintk("<-- %s\n", __func__);
4967 struct rpc_call_ops nfs4_get_lease_time_ops = {
4968 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4969 .rpc_call_done = nfs4_get_lease_time_done,
4972 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4974 struct rpc_task *task;
4975 struct nfs4_get_lease_time_args args;
4976 struct nfs4_get_lease_time_res res = {
4977 .lr_fsinfo = fsinfo,
4979 struct nfs4_get_lease_time_data data = {
4984 struct rpc_message msg = {
4985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4989 struct rpc_task_setup task_setup = {
4990 .rpc_client = clp->cl_rpcclient,
4991 .rpc_message = &msg,
4992 .callback_ops = &nfs4_get_lease_time_ops,
4993 .callback_data = &data,
4994 .flags = RPC_TASK_TIMEOUT,
4998 dprintk("--> %s\n", __func__);
4999 task = rpc_run_task(&task_setup);
5002 status = PTR_ERR(task);
5004 status = task->tk_status;
5007 dprintk("<-- %s return %d\n", __func__, status);
5013 * Reset a slot table
5015 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5018 struct nfs4_slot *new = NULL;
5022 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5023 max_reqs, tbl->max_slots);
5025 /* Does the newly negotiated max_reqs match the existing slot table? */
5026 if (max_reqs != tbl->max_slots) {
5028 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5035 spin_lock(&tbl->slot_tbl_lock);
5038 tbl->max_slots = max_reqs;
5040 for (i = 0; i < tbl->max_slots; ++i)
5041 tbl->slots[i].seq_nr = ivalue;
5042 spin_unlock(&tbl->slot_tbl_lock);
5043 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5044 tbl, tbl->slots, tbl->max_slots);
5046 dprintk("<-- %s: return %d\n", __func__, ret);
5050 /* Destroy the slot table */
5051 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5053 if (session->fc_slot_table.slots != NULL) {
5054 kfree(session->fc_slot_table.slots);
5055 session->fc_slot_table.slots = NULL;
5057 if (session->bc_slot_table.slots != NULL) {
5058 kfree(session->bc_slot_table.slots);
5059 session->bc_slot_table.slots = NULL;
5065 * Initialize slot table
5067 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5068 int max_slots, int ivalue)
5070 struct nfs4_slot *slot;
5073 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5075 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5077 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5082 spin_lock(&tbl->slot_tbl_lock);
5083 tbl->max_slots = max_slots;
5085 tbl->highest_used_slotid = -1; /* no slot is currently used */
5086 spin_unlock(&tbl->slot_tbl_lock);
5087 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5088 tbl, tbl->slots, tbl->max_slots);
5090 dprintk("<-- %s: return %d\n", __func__, ret);
5095 * Initialize or reset the forechannel and backchannel tables
5097 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5099 struct nfs4_slot_table *tbl;
5102 dprintk("--> %s\n", __func__);
5104 tbl = &ses->fc_slot_table;
5105 if (tbl->slots == NULL) {
5106 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5107 if (status) /* -ENOMEM */
5110 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5115 tbl = &ses->bc_slot_table;
5116 if (tbl->slots == NULL) {
5117 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5119 /* Fore and back channel share a connection so get
5120 * both slot tables or neither */
5121 nfs4_destroy_slot_tables(ses);
5123 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5127 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5129 struct nfs4_session *session;
5130 struct nfs4_slot_table *tbl;
5132 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5136 tbl = &session->fc_slot_table;
5137 tbl->highest_used_slotid = -1;
5138 spin_lock_init(&tbl->slot_tbl_lock);
5139 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5140 init_completion(&tbl->complete);
5142 tbl = &session->bc_slot_table;
5143 tbl->highest_used_slotid = -1;
5144 spin_lock_init(&tbl->slot_tbl_lock);
5145 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5146 init_completion(&tbl->complete);
5148 session->session_state = 1<<NFS4_SESSION_INITING;
5154 void nfs4_destroy_session(struct nfs4_session *session)
5156 nfs4_proc_destroy_session(session);
5157 dprintk("%s Destroy backchannel for xprt %p\n",
5158 __func__, session->clp->cl_rpcclient->cl_xprt);
5159 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5160 NFS41_BC_MIN_CALLBACKS);
5161 nfs4_destroy_slot_tables(session);
5166 * Initialize the values to be used by the client in CREATE_SESSION
5167 * If nfs4_init_session set the fore channel request and response sizes,
5170 * Set the back channel max_resp_sz_cached to zero to force the client to
5171 * always set csa_cachethis to FALSE because the current implementation
5172 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5174 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5176 struct nfs4_session *session = args->client->cl_session;
5177 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5178 mxresp_sz = session->fc_attrs.max_resp_sz;
5181 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5183 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5184 /* Fore channel attributes */
5185 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5186 args->fc_attrs.max_resp_sz = mxresp_sz;
5187 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5188 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5190 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5191 "max_ops=%u max_reqs=%u\n",
5193 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5194 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5196 /* Back channel attributes */
5197 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5198 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5199 args->bc_attrs.max_resp_sz_cached = 0;
5200 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5201 args->bc_attrs.max_reqs = 1;
5203 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5204 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5206 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5207 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5208 args->bc_attrs.max_reqs);
5211 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5213 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5214 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5216 if (rcvd->max_resp_sz > sent->max_resp_sz)
5219 * Our requested max_ops is the minimum we need; we're not
5220 * prepared to break up compounds into smaller pieces than that.
5221 * So, no point even trying to continue if the server won't
5224 if (rcvd->max_ops < sent->max_ops)
5226 if (rcvd->max_reqs == 0)
5231 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5233 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5234 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5236 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5238 if (rcvd->max_resp_sz < sent->max_resp_sz)
5240 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5242 /* These would render the backchannel useless: */
5243 if (rcvd->max_ops == 0)
5245 if (rcvd->max_reqs == 0)
5250 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5251 struct nfs4_session *session)
5255 ret = nfs4_verify_fore_channel_attrs(args, session);
5258 return nfs4_verify_back_channel_attrs(args, session);
5261 static int _nfs4_proc_create_session(struct nfs_client *clp)
5263 struct nfs4_session *session = clp->cl_session;
5264 struct nfs41_create_session_args args = {
5266 .cb_program = NFS4_CALLBACK,
5268 struct nfs41_create_session_res res = {
5271 struct rpc_message msg = {
5272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5278 nfs4_init_channel_attrs(&args);
5279 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5281 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5284 /* Verify the session's negotiated channel_attrs values */
5285 status = nfs4_verify_channel_attrs(&args, session);
5287 /* Increment the clientid slot sequence id */
5295 * Issues a CREATE_SESSION operation to the server.
5296 * It is the responsibility of the caller to verify the session is
5297 * expired before calling this routine.
5299 int nfs4_proc_create_session(struct nfs_client *clp)
5303 struct nfs4_session *session = clp->cl_session;
5305 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5307 status = _nfs4_proc_create_session(clp);
5311 /* Init or reset the session slot tables */
5312 status = nfs4_setup_session_slot_tables(session);
5313 dprintk("slot table setup returned %d\n", status);
5317 ptr = (unsigned *)&session->sess_id.data[0];
5318 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5319 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5321 dprintk("<-- %s\n", __func__);
5326 * Issue the over-the-wire RPC DESTROY_SESSION.
5327 * The caller must serialize access to this routine.
5329 int nfs4_proc_destroy_session(struct nfs4_session *session)
5332 struct rpc_message msg;
5334 dprintk("--> nfs4_proc_destroy_session\n");
5336 /* session is still being setup */
5337 if (session->clp->cl_cons_state != NFS_CS_READY)
5340 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5341 msg.rpc_argp = session;
5342 msg.rpc_resp = NULL;
5343 msg.rpc_cred = NULL;
5344 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5348 "Got error %d from the server on DESTROY_SESSION. "
5349 "Session has been destroyed regardless...\n", status);
5351 dprintk("<-- nfs4_proc_destroy_session\n");
5355 int nfs4_init_session(struct nfs_server *server)
5357 struct nfs_client *clp = server->nfs_client;
5358 struct nfs4_session *session;
5359 unsigned int rsize, wsize;
5362 if (!nfs4_has_session(clp))
5365 session = clp->cl_session;
5366 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5369 rsize = server->rsize;
5371 rsize = NFS_MAX_FILE_IO_SIZE;
5372 wsize = server->wsize;
5374 wsize = NFS_MAX_FILE_IO_SIZE;
5376 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5377 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5379 ret = nfs4_recover_expired_lease(server);
5381 ret = nfs4_check_client_ready(clp);
5385 int nfs4_init_ds_session(struct nfs_client *clp)
5387 struct nfs4_session *session = clp->cl_session;
5390 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5393 ret = nfs4_client_recover_expired_lease(clp);
5395 /* Test for the DS role */
5396 if (!is_ds_client(clp))
5399 ret = nfs4_check_client_ready(clp);
5403 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5407 * Renew the cl_session lease.
5409 struct nfs4_sequence_data {
5410 struct nfs_client *clp;
5411 struct nfs4_sequence_args args;
5412 struct nfs4_sequence_res res;
5415 static void nfs41_sequence_release(void *data)
5417 struct nfs4_sequence_data *calldata = data;
5418 struct nfs_client *clp = calldata->clp;
5420 if (atomic_read(&clp->cl_count) > 1)
5421 nfs4_schedule_state_renewal(clp);
5422 nfs_put_client(clp);
5426 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5428 switch(task->tk_status) {
5429 case -NFS4ERR_DELAY:
5430 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5433 nfs4_schedule_lease_recovery(clp);
5438 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5440 struct nfs4_sequence_data *calldata = data;
5441 struct nfs_client *clp = calldata->clp;
5443 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5446 if (task->tk_status < 0) {
5447 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5448 if (atomic_read(&clp->cl_count) == 1)
5451 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5452 rpc_restart_call_prepare(task);
5456 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5458 dprintk("<-- %s\n", __func__);
5461 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5463 struct nfs4_sequence_data *calldata = data;
5464 struct nfs_client *clp = calldata->clp;
5465 struct nfs4_sequence_args *args;
5466 struct nfs4_sequence_res *res;
5468 args = task->tk_msg.rpc_argp;
5469 res = task->tk_msg.rpc_resp;
5471 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5473 rpc_call_start(task);
5476 static const struct rpc_call_ops nfs41_sequence_ops = {
5477 .rpc_call_done = nfs41_sequence_call_done,
5478 .rpc_call_prepare = nfs41_sequence_prepare,
5479 .rpc_release = nfs41_sequence_release,
5482 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5484 struct nfs4_sequence_data *calldata;
5485 struct rpc_message msg = {
5486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5489 struct rpc_task_setup task_setup_data = {
5490 .rpc_client = clp->cl_rpcclient,
5491 .rpc_message = &msg,
5492 .callback_ops = &nfs41_sequence_ops,
5493 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5496 if (!atomic_inc_not_zero(&clp->cl_count))
5497 return ERR_PTR(-EIO);
5498 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5499 if (calldata == NULL) {
5500 nfs_put_client(clp);
5501 return ERR_PTR(-ENOMEM);
5503 msg.rpc_argp = &calldata->args;
5504 msg.rpc_resp = &calldata->res;
5505 calldata->clp = clp;
5506 task_setup_data.callback_data = calldata;
5508 return rpc_run_task(&task_setup_data);
5511 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5513 struct rpc_task *task;
5516 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5518 task = _nfs41_proc_sequence(clp, cred);
5520 ret = PTR_ERR(task);
5522 rpc_put_task_async(task);
5523 dprintk("<-- %s status=%d\n", __func__, ret);
5527 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5529 struct rpc_task *task;
5532 task = _nfs41_proc_sequence(clp, cred);
5534 ret = PTR_ERR(task);
5537 ret = rpc_wait_for_completion_task(task);
5539 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5541 if (task->tk_status == 0)
5542 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5543 ret = task->tk_status;
5547 dprintk("<-- %s status=%d\n", __func__, ret);
5551 struct nfs4_reclaim_complete_data {
5552 struct nfs_client *clp;
5553 struct nfs41_reclaim_complete_args arg;
5554 struct nfs41_reclaim_complete_res res;
5557 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5559 struct nfs4_reclaim_complete_data *calldata = data;
5561 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5562 if (nfs41_setup_sequence(calldata->clp->cl_session,
5563 &calldata->arg.seq_args,
5564 &calldata->res.seq_res, 0, task))
5567 rpc_call_start(task);
5570 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5572 switch(task->tk_status) {
5574 case -NFS4ERR_COMPLETE_ALREADY:
5575 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5577 case -NFS4ERR_DELAY:
5578 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5580 case -NFS4ERR_RETRY_UNCACHED_REP:
5583 nfs4_schedule_lease_recovery(clp);
5588 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5590 struct nfs4_reclaim_complete_data *calldata = data;
5591 struct nfs_client *clp = calldata->clp;
5592 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5594 dprintk("--> %s\n", __func__);
5595 if (!nfs41_sequence_done(task, res))
5598 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5599 rpc_restart_call_prepare(task);
5602 dprintk("<-- %s\n", __func__);
5605 static void nfs4_free_reclaim_complete_data(void *data)
5607 struct nfs4_reclaim_complete_data *calldata = data;
5612 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5613 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5614 .rpc_call_done = nfs4_reclaim_complete_done,
5615 .rpc_release = nfs4_free_reclaim_complete_data,
5619 * Issue a global reclaim complete.
5621 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5623 struct nfs4_reclaim_complete_data *calldata;
5624 struct rpc_task *task;
5625 struct rpc_message msg = {
5626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5628 struct rpc_task_setup task_setup_data = {
5629 .rpc_client = clp->cl_rpcclient,
5630 .rpc_message = &msg,
5631 .callback_ops = &nfs4_reclaim_complete_call_ops,
5632 .flags = RPC_TASK_ASYNC,
5634 int status = -ENOMEM;
5636 dprintk("--> %s\n", __func__);
5637 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5638 if (calldata == NULL)
5640 calldata->clp = clp;
5641 calldata->arg.one_fs = 0;
5643 msg.rpc_argp = &calldata->arg;
5644 msg.rpc_resp = &calldata->res;
5645 task_setup_data.callback_data = calldata;
5646 task = rpc_run_task(&task_setup_data);
5648 status = PTR_ERR(task);
5651 status = nfs4_wait_for_completion_rpc_task(task);
5653 status = task->tk_status;
5657 dprintk("<-- %s status=%d\n", __func__, status);
5662 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5664 struct nfs4_layoutget *lgp = calldata;
5665 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5667 dprintk("--> %s\n", __func__);
5668 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5669 * right now covering the LAYOUTGET we are about to send.
5670 * However, that is not so catastrophic, and there seems
5671 * to be no way to prevent it completely.
5673 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5674 &lgp->res.seq_res, 0, task))
5676 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5677 NFS_I(lgp->args.inode)->layout,
5678 lgp->args.ctx->state)) {
5679 rpc_exit(task, NFS4_OK);
5682 rpc_call_start(task);
5685 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5687 struct nfs4_layoutget *lgp = calldata;
5688 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5690 dprintk("--> %s\n", __func__);
5692 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5695 switch (task->tk_status) {
5698 case -NFS4ERR_LAYOUTTRYLATER:
5699 case -NFS4ERR_RECALLCONFLICT:
5700 task->tk_status = -NFS4ERR_DELAY;
5703 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5704 rpc_restart_call_prepare(task);
5708 dprintk("<-- %s\n", __func__);
5711 static void nfs4_layoutget_release(void *calldata)
5713 struct nfs4_layoutget *lgp = calldata;
5715 dprintk("--> %s\n", __func__);
5716 put_nfs_open_context(lgp->args.ctx);
5718 dprintk("<-- %s\n", __func__);
5721 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5722 .rpc_call_prepare = nfs4_layoutget_prepare,
5723 .rpc_call_done = nfs4_layoutget_done,
5724 .rpc_release = nfs4_layoutget_release,
5727 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5729 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5730 struct rpc_task *task;
5731 struct rpc_message msg = {
5732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5733 .rpc_argp = &lgp->args,
5734 .rpc_resp = &lgp->res,
5736 struct rpc_task_setup task_setup_data = {
5737 .rpc_client = server->client,
5738 .rpc_message = &msg,
5739 .callback_ops = &nfs4_layoutget_call_ops,
5740 .callback_data = lgp,
5741 .flags = RPC_TASK_ASYNC,
5745 dprintk("--> %s\n", __func__);
5747 lgp->res.layoutp = &lgp->args.layout;
5748 lgp->res.seq_res.sr_slot = NULL;
5749 task = rpc_run_task(&task_setup_data);
5751 return PTR_ERR(task);
5752 status = nfs4_wait_for_completion_rpc_task(task);
5754 status = task->tk_status;
5756 status = pnfs_layout_process(lgp);
5758 dprintk("<-- %s status=%d\n", __func__, status);
5763 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5765 struct nfs4_layoutreturn *lrp = calldata;
5767 dprintk("--> %s\n", __func__);
5768 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5769 &lrp->res.seq_res, 0, task))
5771 rpc_call_start(task);
5774 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5776 struct nfs4_layoutreturn *lrp = calldata;
5777 struct nfs_server *server;
5778 struct pnfs_layout_hdr *lo = lrp->args.layout;
5780 dprintk("--> %s\n", __func__);
5782 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5785 server = NFS_SERVER(lrp->args.inode);
5786 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5787 rpc_restart_call_prepare(task);
5790 spin_lock(&lo->plh_inode->i_lock);
5791 if (task->tk_status == 0) {
5792 if (lrp->res.lrs_present) {
5793 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5795 BUG_ON(!list_empty(&lo->plh_segs));
5797 lo->plh_block_lgets--;
5798 spin_unlock(&lo->plh_inode->i_lock);
5799 dprintk("<-- %s\n", __func__);
5802 static void nfs4_layoutreturn_release(void *calldata)
5804 struct nfs4_layoutreturn *lrp = calldata;
5806 dprintk("--> %s\n", __func__);
5807 put_layout_hdr(lrp->args.layout);
5809 dprintk("<-- %s\n", __func__);
5812 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5813 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5814 .rpc_call_done = nfs4_layoutreturn_done,
5815 .rpc_release = nfs4_layoutreturn_release,
5818 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5820 struct rpc_task *task;
5821 struct rpc_message msg = {
5822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5823 .rpc_argp = &lrp->args,
5824 .rpc_resp = &lrp->res,
5826 struct rpc_task_setup task_setup_data = {
5827 .rpc_client = lrp->clp->cl_rpcclient,
5828 .rpc_message = &msg,
5829 .callback_ops = &nfs4_layoutreturn_call_ops,
5830 .callback_data = lrp,
5834 dprintk("--> %s\n", __func__);
5835 task = rpc_run_task(&task_setup_data);
5837 return PTR_ERR(task);
5838 status = task->tk_status;
5839 dprintk("<-- %s status=%d\n", __func__, status);
5845 * Retrieve the list of Data Server devices from the MDS.
5847 static int _nfs4_getdevicelist(struct nfs_server *server,
5848 const struct nfs_fh *fh,
5849 struct pnfs_devicelist *devlist)
5851 struct nfs4_getdevicelist_args args = {
5853 .layoutclass = server->pnfs_curr_ld->id,
5855 struct nfs4_getdevicelist_res res = {
5858 struct rpc_message msg = {
5859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5865 dprintk("--> %s\n", __func__);
5866 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5868 dprintk("<-- %s status=%d\n", __func__, status);
5872 int nfs4_proc_getdevicelist(struct nfs_server *server,
5873 const struct nfs_fh *fh,
5874 struct pnfs_devicelist *devlist)
5876 struct nfs4_exception exception = { };
5880 err = nfs4_handle_exception(server,
5881 _nfs4_getdevicelist(server, fh, devlist),
5883 } while (exception.retry);
5885 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5886 err, devlist->num_devs);
5890 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5893 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5895 struct nfs4_getdeviceinfo_args args = {
5898 struct nfs4_getdeviceinfo_res res = {
5901 struct rpc_message msg = {
5902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5908 dprintk("--> %s\n", __func__);
5909 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5910 dprintk("<-- %s status=%d\n", __func__, status);
5915 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5917 struct nfs4_exception exception = { };
5921 err = nfs4_handle_exception(server,
5922 _nfs4_proc_getdeviceinfo(server, pdev),
5924 } while (exception.retry);
5927 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5929 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5931 struct nfs4_layoutcommit_data *data = calldata;
5932 struct nfs_server *server = NFS_SERVER(data->args.inode);
5934 if (nfs4_setup_sequence(server, &data->args.seq_args,
5935 &data->res.seq_res, 1, task))
5937 rpc_call_start(task);
5941 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5943 struct nfs4_layoutcommit_data *data = calldata;
5944 struct nfs_server *server = NFS_SERVER(data->args.inode);
5946 if (!nfs4_sequence_done(task, &data->res.seq_res))
5949 switch (task->tk_status) { /* Just ignore these failures */
5950 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5951 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5952 case NFS4ERR_BADLAYOUT: /* no layout */
5953 case NFS4ERR_GRACE: /* loca_recalim always false */
5954 task->tk_status = 0;
5957 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5958 rpc_restart_call_prepare(task);
5962 if (task->tk_status == 0)
5963 nfs_post_op_update_inode_force_wcc(data->args.inode,
5967 static void nfs4_layoutcommit_release(void *calldata)
5969 struct nfs4_layoutcommit_data *data = calldata;
5970 struct pnfs_layout_segment *lseg, *tmp;
5971 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
5973 pnfs_cleanup_layoutcommit(data);
5974 /* Matched by references in pnfs_set_layoutcommit */
5975 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5976 list_del_init(&lseg->pls_lc_list);
5977 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5982 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
5983 smp_mb__after_clear_bit();
5984 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
5986 put_rpccred(data->cred);
5990 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5991 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5992 .rpc_call_done = nfs4_layoutcommit_done,
5993 .rpc_release = nfs4_layoutcommit_release,
5997 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6001 .rpc_argp = &data->args,
6002 .rpc_resp = &data->res,
6003 .rpc_cred = data->cred,
6005 struct rpc_task_setup task_setup_data = {
6006 .task = &data->task,
6007 .rpc_client = NFS_CLIENT(data->args.inode),
6008 .rpc_message = &msg,
6009 .callback_ops = &nfs4_layoutcommit_ops,
6010 .callback_data = data,
6011 .flags = RPC_TASK_ASYNC,
6013 struct rpc_task *task;
6016 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6017 "lbw: %llu inode %lu\n",
6018 data->task.tk_pid, sync,
6019 data->args.lastbytewritten,
6020 data->args.inode->i_ino);
6022 task = rpc_run_task(&task_setup_data);
6024 return PTR_ERR(task);
6027 status = nfs4_wait_for_completion_rpc_task(task);
6030 status = task->tk_status;
6032 dprintk("%s: status %d\n", __func__, status);
6038 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6039 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6041 struct nfs41_secinfo_no_name_args args = {
6042 .style = SECINFO_STYLE_CURRENT_FH,
6044 struct nfs4_secinfo_res res = {
6047 struct rpc_message msg = {
6048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6052 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6056 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6057 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6059 struct nfs4_exception exception = { };
6062 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6065 case -NFS4ERR_WRONGSEC:
6066 case -NFS4ERR_NOTSUPP:
6069 err = nfs4_handle_exception(server, err, &exception);
6071 } while (exception.retry);
6076 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6077 struct nfs_fsinfo *info)
6081 rpc_authflavor_t flavor;
6082 struct nfs4_secinfo_flavors *flavors;
6084 page = alloc_page(GFP_KERNEL);
6090 flavors = page_address(page);
6091 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6094 * Fall back on "guess and check" method if
6095 * the server doesn't support SECINFO_NO_NAME
6097 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6098 err = nfs4_find_root_sec(server, fhandle, info);
6104 flavor = nfs_find_best_sec(flavors);
6106 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6115 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6118 struct nfs41_test_stateid_args args = {
6119 .stateid = &state->stateid,
6121 struct nfs41_test_stateid_res res;
6122 struct rpc_message msg = {
6123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6127 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6128 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6132 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6134 struct nfs4_exception exception = { };
6137 err = nfs4_handle_exception(server,
6138 _nfs41_test_stateid(server, state),
6140 } while (exception.retry);
6144 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6147 struct nfs41_free_stateid_args args = {
6148 .stateid = &state->stateid,
6150 struct nfs41_free_stateid_res res;
6151 struct rpc_message msg = {
6152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6157 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6158 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6162 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6164 struct nfs4_exception exception = { };
6167 err = nfs4_handle_exception(server,
6168 _nfs4_free_stateid(server, state),
6170 } while (exception.retry);
6173 #endif /* CONFIG_NFS_V4_1 */
6175 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6176 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6177 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6178 .recover_open = nfs4_open_reclaim,
6179 .recover_lock = nfs4_lock_reclaim,
6180 .establish_clid = nfs4_init_clientid,
6181 .get_clid_cred = nfs4_get_setclientid_cred,
6184 #if defined(CONFIG_NFS_V4_1)
6185 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6186 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6187 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6188 .recover_open = nfs4_open_reclaim,
6189 .recover_lock = nfs4_lock_reclaim,
6190 .establish_clid = nfs41_init_clientid,
6191 .get_clid_cred = nfs4_get_exchange_id_cred,
6192 .reclaim_complete = nfs41_proc_reclaim_complete,
6194 #endif /* CONFIG_NFS_V4_1 */
6196 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6197 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6198 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6199 .recover_open = nfs4_open_expired,
6200 .recover_lock = nfs4_lock_expired,
6201 .establish_clid = nfs4_init_clientid,
6202 .get_clid_cred = nfs4_get_setclientid_cred,
6205 #if defined(CONFIG_NFS_V4_1)
6206 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6207 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6208 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6209 .recover_open = nfs41_open_expired,
6210 .recover_lock = nfs41_lock_expired,
6211 .establish_clid = nfs41_init_clientid,
6212 .get_clid_cred = nfs4_get_exchange_id_cred,
6214 #endif /* CONFIG_NFS_V4_1 */
6216 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6217 .sched_state_renewal = nfs4_proc_async_renew,
6218 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6219 .renew_lease = nfs4_proc_renew,
6222 #if defined(CONFIG_NFS_V4_1)
6223 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6224 .sched_state_renewal = nfs41_proc_async_sequence,
6225 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6226 .renew_lease = nfs4_proc_sequence,
6230 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6232 .call_sync = _nfs4_call_sync,
6233 .validate_stateid = nfs4_validate_delegation_stateid,
6234 .find_root_sec = nfs4_find_root_sec,
6235 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6236 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6237 .state_renewal_ops = &nfs40_state_renewal_ops,
6240 #if defined(CONFIG_NFS_V4_1)
6241 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6243 .call_sync = _nfs4_call_sync_session,
6244 .validate_stateid = nfs41_validate_delegation_stateid,
6245 .find_root_sec = nfs41_find_root_sec,
6246 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6247 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6248 .state_renewal_ops = &nfs41_state_renewal_ops,
6252 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6253 [0] = &nfs_v4_0_minor_ops,
6254 #if defined(CONFIG_NFS_V4_1)
6255 [1] = &nfs_v4_1_minor_ops,
6259 static const struct inode_operations nfs4_file_inode_operations = {
6260 .permission = nfs_permission,
6261 .getattr = nfs_getattr,
6262 .setattr = nfs_setattr,
6263 .getxattr = generic_getxattr,
6264 .setxattr = generic_setxattr,
6265 .listxattr = generic_listxattr,
6266 .removexattr = generic_removexattr,
6269 const struct nfs_rpc_ops nfs_v4_clientops = {
6270 .version = 4, /* protocol version */
6271 .dentry_ops = &nfs4_dentry_operations,
6272 .dir_inode_ops = &nfs4_dir_inode_operations,
6273 .file_inode_ops = &nfs4_file_inode_operations,
6274 .file_ops = &nfs4_file_operations,
6275 .getroot = nfs4_proc_get_root,
6276 .getattr = nfs4_proc_getattr,
6277 .setattr = nfs4_proc_setattr,
6278 .lookup = nfs4_proc_lookup,
6279 .access = nfs4_proc_access,
6280 .readlink = nfs4_proc_readlink,
6281 .create = nfs4_proc_create,
6282 .remove = nfs4_proc_remove,
6283 .unlink_setup = nfs4_proc_unlink_setup,
6284 .unlink_done = nfs4_proc_unlink_done,
6285 .rename = nfs4_proc_rename,
6286 .rename_setup = nfs4_proc_rename_setup,
6287 .rename_done = nfs4_proc_rename_done,
6288 .link = nfs4_proc_link,
6289 .symlink = nfs4_proc_symlink,
6290 .mkdir = nfs4_proc_mkdir,
6291 .rmdir = nfs4_proc_remove,
6292 .readdir = nfs4_proc_readdir,
6293 .mknod = nfs4_proc_mknod,
6294 .statfs = nfs4_proc_statfs,
6295 .fsinfo = nfs4_proc_fsinfo,
6296 .pathconf = nfs4_proc_pathconf,
6297 .set_capabilities = nfs4_server_capabilities,
6298 .decode_dirent = nfs4_decode_dirent,
6299 .read_setup = nfs4_proc_read_setup,
6300 .read_done = nfs4_read_done,
6301 .write_setup = nfs4_proc_write_setup,
6302 .write_done = nfs4_write_done,
6303 .commit_setup = nfs4_proc_commit_setup,
6304 .commit_done = nfs4_commit_done,
6305 .lock = nfs4_proc_lock,
6306 .clear_acl_cache = nfs4_zap_acl_attr,
6307 .close_context = nfs4_close_context,
6308 .open_context = nfs4_atomic_open,
6309 .init_client = nfs4_init_client,
6310 .secinfo = nfs4_proc_secinfo,
6313 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6314 .prefix = XATTR_NAME_NFSV4_ACL,
6315 .list = nfs4_xattr_list_nfs4_acl,
6316 .get = nfs4_xattr_get_nfs4_acl,
6317 .set = nfs4_xattr_set_nfs4_acl,
6320 const struct xattr_handler *nfs4_xattr_handlers[] = {
6321 &nfs4_xattr_nfs4_acl_handler,