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/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/sunrpc/gss_api.h>
45 #include <linux/nfs.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfs_fs.h>
48 #include <linux/nfs_page.h>
49 #include <linux/nfs_mount.h>
50 #include <linux/namei.h>
51 #include <linux/mount.h>
52 #include <linux/module.h>
53 #include <linux/sunrpc/bc_xprt.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
58 #include "delegation.h"
64 #define NFSDBG_FACILITY NFSDBG_PROC
66 #define NFS4_POLL_RETRY_MIN (HZ/10)
67 #define NFS4_POLL_RETRY_MAX (15*HZ)
69 #define NFS4_MAX_LOOP_ON_RECOVER (10)
72 static int _nfs4_proc_open(struct nfs4_opendata *data);
73 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
74 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
75 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
76 static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
77 const struct qstr *name, struct nfs_fh *fhandle,
78 struct nfs_fattr *fattr);
79 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
80 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
84 /* Prevent leaks of NFSv4 errors into userland */
85 static int nfs4_map_errors(int err)
90 case -NFS4ERR_RESOURCE:
92 case -NFS4ERR_WRONGSEC:
94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
98 dprintk("%s could not handle NFSv4 error %d\n",
106 * This is our standard bitmap for GETATTR requests.
108 const u32 nfs4_fattr_bitmap[2] = {
110 | FATTR4_WORD0_CHANGE
113 | FATTR4_WORD0_FILEID,
115 | FATTR4_WORD1_NUMLINKS
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
125 const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
134 const u32 nfs4_pathconf_bitmap[2] = {
136 | FATTR4_WORD0_MAXNAME,
140 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
144 FATTR4_WORD1_TIME_DELTA
145 | FATTR4_WORD1_FS_LAYOUT_TYPES
148 const u32 nfs4_fs_locations_bitmap[2] = {
150 | FATTR4_WORD0_CHANGE
153 | FATTR4_WORD0_FILEID
154 | FATTR4_WORD0_FS_LOCATIONS,
156 | FATTR4_WORD1_NUMLINKS
158 | FATTR4_WORD1_OWNER_GROUP
159 | FATTR4_WORD1_RAWDEV
160 | FATTR4_WORD1_SPACE_USED
161 | FATTR4_WORD1_TIME_ACCESS
162 | FATTR4_WORD1_TIME_METADATA
163 | FATTR4_WORD1_TIME_MODIFY
164 | FATTR4_WORD1_MOUNTED_ON_FILEID
167 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
168 struct nfs4_readdir_arg *readdir)
172 BUG_ON(readdir->count < 80);
174 readdir->cookie = cookie;
175 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
180 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
185 * NFSv4 servers do not return entries for '.' and '..'
186 * Therefore, we fake these entries here. We let '.'
187 * have cookie 0 and '..' have cookie 1. Note that
188 * when talking to the server, we always send cookie 0
191 start = p = kmap_atomic(*readdir->pages, KM_USER0);
194 *p++ = xdr_one; /* next */
195 *p++ = xdr_zero; /* cookie, first word */
196 *p++ = xdr_one; /* cookie, second word */
197 *p++ = xdr_one; /* entry len */
198 memcpy(p, ".\0\0\0", 4); /* entry */
200 *p++ = xdr_one; /* bitmap length */
201 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
202 *p++ = htonl(8); /* attribute buffer length */
203 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
206 *p++ = xdr_one; /* next */
207 *p++ = xdr_zero; /* cookie, first word */
208 *p++ = xdr_two; /* cookie, second word */
209 *p++ = xdr_two; /* entry len */
210 memcpy(p, "..\0\0", 4); /* entry */
212 *p++ = xdr_one; /* bitmap length */
213 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
214 *p++ = htonl(8); /* attribute buffer length */
215 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
217 readdir->pgbase = (char *)p - (char *)start;
218 readdir->count -= readdir->pgbase;
219 kunmap_atomic(start, KM_USER0);
222 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
228 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
229 nfs_wait_bit_killable, TASK_KILLABLE);
233 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
240 *timeout = NFS4_POLL_RETRY_MIN;
241 if (*timeout > NFS4_POLL_RETRY_MAX)
242 *timeout = NFS4_POLL_RETRY_MAX;
243 schedule_timeout_killable(*timeout);
244 if (fatal_signal_pending(current))
250 /* This is the error handling routine for processes that are allowed
253 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
255 struct nfs_client *clp = server->nfs_client;
256 struct nfs4_state *state = exception->state;
259 exception->retry = 0;
263 case -NFS4ERR_ADMIN_REVOKED:
264 case -NFS4ERR_BAD_STATEID:
265 case -NFS4ERR_OPENMODE:
268 nfs4_schedule_stateid_recovery(server, state);
269 goto wait_on_recovery;
270 case -NFS4ERR_STALE_STATEID:
271 case -NFS4ERR_STALE_CLIENTID:
272 case -NFS4ERR_EXPIRED:
273 nfs4_schedule_lease_recovery(clp);
274 goto wait_on_recovery;
275 #if defined(CONFIG_NFS_V4_1)
276 case -NFS4ERR_BADSESSION:
277 case -NFS4ERR_BADSLOT:
278 case -NFS4ERR_BAD_HIGH_SLOT:
279 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
280 case -NFS4ERR_DEADSESSION:
281 case -NFS4ERR_SEQ_FALSE_RETRY:
282 case -NFS4ERR_SEQ_MISORDERED:
283 dprintk("%s ERROR: %d Reset session\n", __func__,
285 nfs4_schedule_session_recovery(clp->cl_session);
286 exception->retry = 1;
288 #endif /* defined(CONFIG_NFS_V4_1) */
289 case -NFS4ERR_FILE_OPEN:
290 if (exception->timeout > HZ) {
291 /* We have retried a decent amount, time to
300 ret = nfs4_delay(server->client, &exception->timeout);
303 case -NFS4ERR_OLD_STATEID:
304 exception->retry = 1;
306 case -NFS4ERR_BADOWNER:
307 /* The following works around a Linux server bug! */
308 case -NFS4ERR_BADNAME:
309 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
310 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
311 exception->retry = 1;
312 printk(KERN_WARNING "NFS: v4 server %s "
313 "does not accept raw "
315 "Reenabling the idmapper.\n",
316 server->nfs_client->cl_hostname);
319 /* We failed to handle the error */
320 return nfs4_map_errors(ret);
322 ret = nfs4_wait_clnt_recover(clp);
324 exception->retry = 1;
329 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
331 spin_lock(&clp->cl_lock);
332 if (time_before(clp->cl_last_renewal,timestamp))
333 clp->cl_last_renewal = timestamp;
334 spin_unlock(&clp->cl_lock);
337 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
339 do_renew_lease(server->nfs_client, timestamp);
342 #if defined(CONFIG_NFS_V4_1)
345 * nfs4_free_slot - free a slot and efficiently update slot table.
347 * freeing a slot is trivially done by clearing its respective bit
349 * If the freed slotid equals highest_used_slotid we want to update it
350 * so that the server would be able to size down the slot table if needed,
351 * otherwise we know that the highest_used_slotid is still in use.
352 * When updating highest_used_slotid there may be "holes" in the bitmap
353 * so we need to scan down from highest_used_slotid to 0 looking for the now
354 * highest slotid in use.
355 * If none found, highest_used_slotid is set to -1.
357 * Must be called while holding tbl->slot_tbl_lock
360 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
362 int free_slotid = free_slot - tbl->slots;
363 int slotid = free_slotid;
365 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
366 /* clear used bit in bitmap */
367 __clear_bit(slotid, tbl->used_slots);
369 /* update highest_used_slotid when it is freed */
370 if (slotid == tbl->highest_used_slotid) {
371 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
372 if (slotid < tbl->max_slots)
373 tbl->highest_used_slotid = slotid;
375 tbl->highest_used_slotid = -1;
377 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
378 free_slotid, tbl->highest_used_slotid);
382 * Signal state manager thread if session fore channel is drained
384 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
386 struct rpc_task *task;
388 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
389 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
391 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
395 if (ses->fc_slot_table.highest_used_slotid != -1)
398 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
399 complete(&ses->fc_slot_table.complete);
403 * Signal state manager thread if session back channel is drained
405 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
407 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
408 ses->bc_slot_table.highest_used_slotid != -1)
410 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
411 complete(&ses->bc_slot_table.complete);
414 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
416 struct nfs4_slot_table *tbl;
418 tbl = &res->sr_session->fc_slot_table;
420 /* just wake up the next guy waiting since
421 * we may have not consumed a slot after all */
422 dprintk("%s: No slot\n", __func__);
426 spin_lock(&tbl->slot_tbl_lock);
427 nfs4_free_slot(tbl, res->sr_slot);
428 nfs4_check_drain_fc_complete(res->sr_session);
429 spin_unlock(&tbl->slot_tbl_lock);
433 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
435 unsigned long timestamp;
436 struct nfs_client *clp;
439 * sr_status remains 1 if an RPC level error occurred. The server
440 * may or may not have processed the sequence operation..
441 * Proceed as if the server received and processed the sequence
444 if (res->sr_status == 1)
445 res->sr_status = NFS_OK;
447 /* don't increment the sequence number if the task wasn't sent */
448 if (!RPC_WAS_SENT(task))
451 /* Check the SEQUENCE operation status */
452 switch (res->sr_status) {
454 /* Update the slot's sequence and clientid lease timer */
455 ++res->sr_slot->seq_nr;
456 timestamp = res->sr_renewal_time;
457 clp = res->sr_session->clp;
458 do_renew_lease(clp, timestamp);
459 /* Check sequence flags */
460 if (res->sr_status_flags != 0)
461 nfs4_schedule_lease_recovery(clp);
464 /* The server detected a resend of the RPC call and
465 * returned NFS4ERR_DELAY as per Section 2.10.6.2
468 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
470 res->sr_slot - res->sr_session->fc_slot_table.slots,
471 res->sr_slot->seq_nr);
474 /* Just update the slot sequence no. */
475 ++res->sr_slot->seq_nr;
478 /* The session may be reset by one of the error handlers. */
479 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
480 nfs41_sequence_free_slot(res);
483 if (!rpc_restart_call(task))
485 rpc_delay(task, NFS4_POLL_RETRY_MAX);
489 static int nfs4_sequence_done(struct rpc_task *task,
490 struct nfs4_sequence_res *res)
492 if (res->sr_session == NULL)
494 return nfs41_sequence_done(task, res);
498 * nfs4_find_slot - efficiently look for a free slot
500 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
501 * If found, we mark the slot as used, update the highest_used_slotid,
502 * and respectively set up the sequence operation args.
503 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
505 * Note: must be called with under the slot_tbl_lock.
508 nfs4_find_slot(struct nfs4_slot_table *tbl)
511 u8 ret_id = NFS4_MAX_SLOT_TABLE;
512 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
514 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
515 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
517 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
518 if (slotid >= tbl->max_slots)
520 __set_bit(slotid, tbl->used_slots);
521 if (slotid > tbl->highest_used_slotid)
522 tbl->highest_used_slotid = slotid;
525 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
526 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
530 int nfs41_setup_sequence(struct nfs4_session *session,
531 struct nfs4_sequence_args *args,
532 struct nfs4_sequence_res *res,
534 struct rpc_task *task)
536 struct nfs4_slot *slot;
537 struct nfs4_slot_table *tbl;
540 dprintk("--> %s\n", __func__);
541 /* slot already allocated? */
542 if (res->sr_slot != NULL)
545 tbl = &session->fc_slot_table;
547 spin_lock(&tbl->slot_tbl_lock);
548 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
549 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
551 * The state manager will wait until the slot table is empty.
552 * Schedule the reset thread
554 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
555 spin_unlock(&tbl->slot_tbl_lock);
556 dprintk("%s Schedule Session Reset\n", __func__);
560 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
561 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
562 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
563 spin_unlock(&tbl->slot_tbl_lock);
564 dprintk("%s enforce FIFO order\n", __func__);
568 slotid = nfs4_find_slot(tbl);
569 if (slotid == NFS4_MAX_SLOT_TABLE) {
570 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
571 spin_unlock(&tbl->slot_tbl_lock);
572 dprintk("<-- %s: no free slots\n", __func__);
575 spin_unlock(&tbl->slot_tbl_lock);
577 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
578 slot = tbl->slots + slotid;
579 args->sa_session = session;
580 args->sa_slotid = slotid;
581 args->sa_cache_this = cache_reply;
583 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
585 res->sr_session = session;
587 res->sr_renewal_time = jiffies;
588 res->sr_status_flags = 0;
590 * sr_status is only set in decode_sequence, and so will remain
591 * set to 1 if an rpc level failure occurs.
596 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
598 int nfs4_setup_sequence(const struct nfs_server *server,
599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
602 struct rpc_task *task)
604 struct nfs4_session *session = nfs4_get_session(server);
607 if (session == NULL) {
608 args->sa_session = NULL;
609 res->sr_session = NULL;
613 dprintk("--> %s clp %p session %p sr_slot %td\n",
614 __func__, session->clp, session, res->sr_slot ?
615 res->sr_slot - session->fc_slot_table.slots : -1);
617 ret = nfs41_setup_sequence(session, args, res, cache_reply,
620 dprintk("<-- %s status=%d\n", __func__, ret);
624 struct nfs41_call_sync_data {
625 const struct nfs_server *seq_server;
626 struct nfs4_sequence_args *seq_args;
627 struct nfs4_sequence_res *seq_res;
631 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
633 struct nfs41_call_sync_data *data = calldata;
635 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
637 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
638 data->seq_res, data->cache_reply, task))
640 rpc_call_start(task);
643 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
645 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
646 nfs41_call_sync_prepare(task, calldata);
649 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
651 struct nfs41_call_sync_data *data = calldata;
653 nfs41_sequence_done(task, data->seq_res);
656 struct rpc_call_ops nfs41_call_sync_ops = {
657 .rpc_call_prepare = nfs41_call_sync_prepare,
658 .rpc_call_done = nfs41_call_sync_done,
661 struct rpc_call_ops nfs41_call_priv_sync_ops = {
662 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
663 .rpc_call_done = nfs41_call_sync_done,
666 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
667 struct nfs_server *server,
668 struct rpc_message *msg,
669 struct nfs4_sequence_args *args,
670 struct nfs4_sequence_res *res,
675 struct rpc_task *task;
676 struct nfs41_call_sync_data data = {
677 .seq_server = server,
680 .cache_reply = cache_reply,
682 struct rpc_task_setup task_setup = {
685 .callback_ops = &nfs41_call_sync_ops,
686 .callback_data = &data
691 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
692 task = rpc_run_task(&task_setup);
696 ret = task->tk_status;
702 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
703 struct nfs_server *server,
704 struct rpc_message *msg,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
709 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
713 static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
718 #endif /* CONFIG_NFS_V4_1 */
720 int _nfs4_call_sync(struct rpc_clnt *clnt,
721 struct nfs_server *server,
722 struct rpc_message *msg,
723 struct nfs4_sequence_args *args,
724 struct nfs4_sequence_res *res,
727 args->sa_session = res->sr_session = NULL;
728 return rpc_call_sync(clnt, msg, 0);
732 int nfs4_call_sync(struct rpc_clnt *clnt,
733 struct nfs_server *server,
734 struct rpc_message *msg,
735 struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res,
739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
740 args, res, cache_reply);
743 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
745 struct nfs_inode *nfsi = NFS_I(dir);
747 spin_lock(&dir->i_lock);
748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
749 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
750 nfs_force_lookup_revalidate(dir);
751 nfsi->change_attr = cinfo->after;
752 spin_unlock(&dir->i_lock);
755 struct nfs4_opendata {
757 struct nfs_openargs o_arg;
758 struct nfs_openres o_res;
759 struct nfs_open_confirmargs c_arg;
760 struct nfs_open_confirmres c_res;
761 struct nfs_fattr f_attr;
762 struct nfs_fattr dir_attr;
765 struct nfs4_state_owner *owner;
766 struct nfs4_state *state;
768 unsigned long timestamp;
769 unsigned int rpc_done : 1;
775 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
777 p->o_res.f_attr = &p->f_attr;
778 p->o_res.dir_attr = &p->dir_attr;
779 p->o_res.seqid = p->o_arg.seqid;
780 p->c_res.seqid = p->c_arg.seqid;
781 p->o_res.server = p->o_arg.server;
782 nfs_fattr_init(&p->f_attr);
783 nfs_fattr_init(&p->dir_attr);
786 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
787 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
788 const struct iattr *attrs,
791 struct dentry *parent = dget_parent(path->dentry);
792 struct inode *dir = parent->d_inode;
793 struct nfs_server *server = NFS_SERVER(dir);
794 struct nfs4_opendata *p;
796 p = kzalloc(sizeof(*p), gfp_mask);
799 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
800 if (p->o_arg.seqid == NULL)
806 atomic_inc(&sp->so_count);
807 p->o_arg.fh = NFS_FH(dir);
808 p->o_arg.open_flags = flags;
809 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
810 p->o_arg.clientid = server->nfs_client->cl_clientid;
811 p->o_arg.id = sp->so_owner_id.id;
812 p->o_arg.name = &p->path.dentry->d_name;
813 p->o_arg.server = server;
814 p->o_arg.bitmask = server->attr_bitmask;
815 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
816 if (flags & O_CREAT) {
819 p->o_arg.u.attrs = &p->attrs;
820 memcpy(&p->attrs, attrs, sizeof(p->attrs));
821 s = (u32 *) p->o_arg.u.verifier.data;
825 p->c_arg.fh = &p->o_res.fh;
826 p->c_arg.stateid = &p->o_res.stateid;
827 p->c_arg.seqid = p->o_arg.seqid;
828 nfs4_init_opendata_res(p);
838 static void nfs4_opendata_free(struct kref *kref)
840 struct nfs4_opendata *p = container_of(kref,
841 struct nfs4_opendata, kref);
843 nfs_free_seqid(p->o_arg.seqid);
844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
846 nfs4_put_state_owner(p->owner);
852 static void nfs4_opendata_put(struct nfs4_opendata *p)
855 kref_put(&p->kref, nfs4_opendata_free);
858 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
862 ret = rpc_wait_for_completion_task(task);
866 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
870 if (open_mode & O_EXCL)
872 switch (mode & (FMODE_READ|FMODE_WRITE)) {
874 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
875 && state->n_rdonly != 0;
878 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
879 && state->n_wronly != 0;
881 case FMODE_READ|FMODE_WRITE:
882 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
883 && state->n_rdwr != 0;
889 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
891 if ((delegation->type & fmode) != fmode)
893 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
895 nfs_mark_delegation_referenced(delegation);
899 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
908 case FMODE_READ|FMODE_WRITE:
911 nfs4_state_set_mode_locked(state, state->state | fmode);
914 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
916 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
917 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
918 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
921 set_bit(NFS_O_RDONLY_STATE, &state->flags);
924 set_bit(NFS_O_WRONLY_STATE, &state->flags);
926 case FMODE_READ|FMODE_WRITE:
927 set_bit(NFS_O_RDWR_STATE, &state->flags);
931 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
933 write_seqlock(&state->seqlock);
934 nfs_set_open_stateid_locked(state, stateid, fmode);
935 write_sequnlock(&state->seqlock);
938 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
941 * Protect the call to nfs4_state_set_mode_locked and
942 * serialise the stateid update
944 write_seqlock(&state->seqlock);
945 if (deleg_stateid != NULL) {
946 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
947 set_bit(NFS_DELEGATED_STATE, &state->flags);
949 if (open_stateid != NULL)
950 nfs_set_open_stateid_locked(state, open_stateid, fmode);
951 write_sequnlock(&state->seqlock);
952 spin_lock(&state->owner->so_lock);
953 update_open_stateflags(state, fmode);
954 spin_unlock(&state->owner->so_lock);
957 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
959 struct nfs_inode *nfsi = NFS_I(state->inode);
960 struct nfs_delegation *deleg_cur;
963 fmode &= (FMODE_READ|FMODE_WRITE);
966 deleg_cur = rcu_dereference(nfsi->delegation);
967 if (deleg_cur == NULL)
970 spin_lock(&deleg_cur->lock);
971 if (nfsi->delegation != deleg_cur ||
972 (deleg_cur->type & fmode) != fmode)
973 goto no_delegation_unlock;
975 if (delegation == NULL)
976 delegation = &deleg_cur->stateid;
977 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
978 goto no_delegation_unlock;
980 nfs_mark_delegation_referenced(deleg_cur);
981 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
983 no_delegation_unlock:
984 spin_unlock(&deleg_cur->lock);
988 if (!ret && open_stateid != NULL) {
989 __update_open_stateid(state, open_stateid, NULL, fmode);
997 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
999 struct nfs_delegation *delegation;
1002 delegation = rcu_dereference(NFS_I(inode)->delegation);
1003 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1008 nfs_inode_return_delegation(inode);
1011 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1013 struct nfs4_state *state = opendata->state;
1014 struct nfs_inode *nfsi = NFS_I(state->inode);
1015 struct nfs_delegation *delegation;
1016 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1017 fmode_t fmode = opendata->o_arg.fmode;
1018 nfs4_stateid stateid;
1022 if (can_open_cached(state, fmode, open_mode)) {
1023 spin_lock(&state->owner->so_lock);
1024 if (can_open_cached(state, fmode, open_mode)) {
1025 update_open_stateflags(state, fmode);
1026 spin_unlock(&state->owner->so_lock);
1027 goto out_return_state;
1029 spin_unlock(&state->owner->so_lock);
1032 delegation = rcu_dereference(nfsi->delegation);
1033 if (delegation == NULL ||
1034 !can_open_delegated(delegation, fmode)) {
1038 /* Save the delegation */
1039 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1041 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1046 /* Try to update the stateid using the delegation */
1047 if (update_open_stateid(state, NULL, &stateid, fmode))
1048 goto out_return_state;
1051 return ERR_PTR(ret);
1053 atomic_inc(&state->count);
1057 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1059 struct inode *inode;
1060 struct nfs4_state *state = NULL;
1061 struct nfs_delegation *delegation;
1064 if (!data->rpc_done) {
1065 state = nfs4_try_open_cached(data);
1070 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1072 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1073 ret = PTR_ERR(inode);
1077 state = nfs4_get_open_state(inode, data->owner);
1080 if (data->o_res.delegation_type != 0) {
1081 int delegation_flags = 0;
1084 delegation = rcu_dereference(NFS_I(inode)->delegation);
1086 delegation_flags = delegation->flags;
1088 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1089 nfs_inode_set_delegation(state->inode,
1090 data->owner->so_cred,
1093 nfs_inode_reclaim_delegation(state->inode,
1094 data->owner->so_cred,
1098 update_open_stateid(state, &data->o_res.stateid, NULL,
1106 return ERR_PTR(ret);
1109 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1111 struct nfs_inode *nfsi = NFS_I(state->inode);
1112 struct nfs_open_context *ctx;
1114 spin_lock(&state->inode->i_lock);
1115 list_for_each_entry(ctx, &nfsi->open_files, list) {
1116 if (ctx->state != state)
1118 get_nfs_open_context(ctx);
1119 spin_unlock(&state->inode->i_lock);
1122 spin_unlock(&state->inode->i_lock);
1123 return ERR_PTR(-ENOENT);
1126 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1128 struct nfs4_opendata *opendata;
1130 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1131 if (opendata == NULL)
1132 return ERR_PTR(-ENOMEM);
1133 opendata->state = state;
1134 atomic_inc(&state->count);
1138 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1140 struct nfs4_state *newstate;
1143 opendata->o_arg.open_flags = 0;
1144 opendata->o_arg.fmode = fmode;
1145 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1146 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1147 nfs4_init_opendata_res(opendata);
1148 ret = _nfs4_recover_proc_open(opendata);
1151 newstate = nfs4_opendata_to_nfs4_state(opendata);
1152 if (IS_ERR(newstate))
1153 return PTR_ERR(newstate);
1154 nfs4_close_state(&opendata->path, newstate, fmode);
1159 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1161 struct nfs4_state *newstate;
1164 /* memory barrier prior to reading state->n_* */
1165 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1167 if (state->n_rdwr != 0) {
1168 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1169 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1172 if (newstate != state)
1175 if (state->n_wronly != 0) {
1176 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1177 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1180 if (newstate != state)
1183 if (state->n_rdonly != 0) {
1184 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1185 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1188 if (newstate != state)
1192 * We may have performed cached opens for all three recoveries.
1193 * Check if we need to update the current stateid.
1195 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1196 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1197 write_seqlock(&state->seqlock);
1198 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1199 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1200 write_sequnlock(&state->seqlock);
1207 * reclaim state on the server after a reboot.
1209 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1211 struct nfs_delegation *delegation;
1212 struct nfs4_opendata *opendata;
1213 fmode_t delegation_type = 0;
1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1220 opendata->o_arg.fh = NFS_FH(state->inode);
1222 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1223 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1224 delegation_type = delegation->type;
1226 opendata->o_arg.u.delegation_type = delegation_type;
1227 status = nfs4_open_recover(opendata, state);
1228 nfs4_opendata_put(opendata);
1232 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1234 struct nfs_server *server = NFS_SERVER(state->inode);
1235 struct nfs4_exception exception = { };
1238 err = _nfs4_do_open_reclaim(ctx, state);
1239 if (err != -NFS4ERR_DELAY)
1241 nfs4_handle_exception(server, err, &exception);
1242 } while (exception.retry);
1246 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1248 struct nfs_open_context *ctx;
1251 ctx = nfs4_state_find_open_context(state);
1253 return PTR_ERR(ctx);
1254 ret = nfs4_do_open_reclaim(ctx, state);
1255 put_nfs_open_context(ctx);
1259 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1261 struct nfs4_opendata *opendata;
1264 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1265 if (IS_ERR(opendata))
1266 return PTR_ERR(opendata);
1267 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1268 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1269 sizeof(opendata->o_arg.u.delegation.data));
1270 ret = nfs4_open_recover(opendata, state);
1271 nfs4_opendata_put(opendata);
1275 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1277 struct nfs4_exception exception = { };
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1281 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1287 case -NFS4ERR_BADSESSION:
1288 case -NFS4ERR_BADSLOT:
1289 case -NFS4ERR_BAD_HIGH_SLOT:
1290 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1291 case -NFS4ERR_DEADSESSION:
1292 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1294 case -NFS4ERR_STALE_CLIENTID:
1295 case -NFS4ERR_STALE_STATEID:
1296 case -NFS4ERR_EXPIRED:
1297 /* Don't recall a delegation if it was lost */
1298 nfs4_schedule_lease_recovery(server->nfs_client);
1302 * The show must go on: exit, but mark the
1303 * stateid as needing recovery.
1305 case -NFS4ERR_ADMIN_REVOKED:
1306 case -NFS4ERR_BAD_STATEID:
1307 nfs4_schedule_stateid_recovery(server, state);
1310 * User RPCSEC_GSS context has expired.
1311 * We cannot recover this stateid now, so
1312 * skip it and allow recovery thread to
1319 err = nfs4_handle_exception(server, err, &exception);
1320 } while (exception.retry);
1325 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1327 struct nfs4_opendata *data = calldata;
1329 data->rpc_status = task->tk_status;
1330 if (data->rpc_status == 0) {
1331 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1332 sizeof(data->o_res.stateid.data));
1333 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1334 renew_lease(data->o_res.server, data->timestamp);
1339 static void nfs4_open_confirm_release(void *calldata)
1341 struct nfs4_opendata *data = calldata;
1342 struct nfs4_state *state = NULL;
1344 /* If this request hasn't been cancelled, do nothing */
1345 if (data->cancelled == 0)
1347 /* In case of error, no cleanup! */
1348 if (!data->rpc_done)
1350 state = nfs4_opendata_to_nfs4_state(data);
1352 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1354 nfs4_opendata_put(data);
1357 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1358 .rpc_call_done = nfs4_open_confirm_done,
1359 .rpc_release = nfs4_open_confirm_release,
1363 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1365 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1367 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1368 struct rpc_task *task;
1369 struct rpc_message msg = {
1370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1371 .rpc_argp = &data->c_arg,
1372 .rpc_resp = &data->c_res,
1373 .rpc_cred = data->owner->so_cred,
1375 struct rpc_task_setup task_setup_data = {
1376 .rpc_client = server->client,
1377 .rpc_message = &msg,
1378 .callback_ops = &nfs4_open_confirm_ops,
1379 .callback_data = data,
1380 .workqueue = nfsiod_workqueue,
1381 .flags = RPC_TASK_ASYNC,
1385 kref_get(&data->kref);
1387 data->rpc_status = 0;
1388 data->timestamp = jiffies;
1389 task = rpc_run_task(&task_setup_data);
1391 return PTR_ERR(task);
1392 status = nfs4_wait_for_completion_rpc_task(task);
1394 data->cancelled = 1;
1397 status = data->rpc_status;
1402 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1404 struct nfs4_opendata *data = calldata;
1405 struct nfs4_state_owner *sp = data->owner;
1407 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1410 * Check if we still need to send an OPEN call, or if we can use
1411 * a delegation instead.
1413 if (data->state != NULL) {
1414 struct nfs_delegation *delegation;
1416 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1419 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1420 if (delegation != NULL &&
1421 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1427 /* Update sequence id. */
1428 data->o_arg.id = sp->so_owner_id.id;
1429 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1430 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1431 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1432 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1434 data->timestamp = jiffies;
1435 if (nfs4_setup_sequence(data->o_arg.server,
1436 &data->o_arg.seq_args,
1437 &data->o_res.seq_res, 1, task))
1439 rpc_call_start(task);
1442 task->tk_action = NULL;
1446 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1448 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1449 nfs4_open_prepare(task, calldata);
1452 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1454 struct nfs4_opendata *data = calldata;
1456 data->rpc_status = task->tk_status;
1458 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1461 if (task->tk_status == 0) {
1462 switch (data->o_res.f_attr->mode & S_IFMT) {
1466 data->rpc_status = -ELOOP;
1469 data->rpc_status = -EISDIR;
1472 data->rpc_status = -ENOTDIR;
1474 renew_lease(data->o_res.server, data->timestamp);
1475 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1476 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1481 static void nfs4_open_release(void *calldata)
1483 struct nfs4_opendata *data = calldata;
1484 struct nfs4_state *state = NULL;
1486 /* If this request hasn't been cancelled, do nothing */
1487 if (data->cancelled == 0)
1489 /* In case of error, no cleanup! */
1490 if (data->rpc_status != 0 || !data->rpc_done)
1492 /* In case we need an open_confirm, no cleanup! */
1493 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1495 state = nfs4_opendata_to_nfs4_state(data);
1497 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1499 nfs4_opendata_put(data);
1502 static const struct rpc_call_ops nfs4_open_ops = {
1503 .rpc_call_prepare = nfs4_open_prepare,
1504 .rpc_call_done = nfs4_open_done,
1505 .rpc_release = nfs4_open_release,
1508 static const struct rpc_call_ops nfs4_recover_open_ops = {
1509 .rpc_call_prepare = nfs4_recover_open_prepare,
1510 .rpc_call_done = nfs4_open_done,
1511 .rpc_release = nfs4_open_release,
1514 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1516 struct inode *dir = data->dir->d_inode;
1517 struct nfs_server *server = NFS_SERVER(dir);
1518 struct nfs_openargs *o_arg = &data->o_arg;
1519 struct nfs_openres *o_res = &data->o_res;
1520 struct rpc_task *task;
1521 struct rpc_message msg = {
1522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1525 .rpc_cred = data->owner->so_cred,
1527 struct rpc_task_setup task_setup_data = {
1528 .rpc_client = server->client,
1529 .rpc_message = &msg,
1530 .callback_ops = &nfs4_open_ops,
1531 .callback_data = data,
1532 .workqueue = nfsiod_workqueue,
1533 .flags = RPC_TASK_ASYNC,
1537 kref_get(&data->kref);
1539 data->rpc_status = 0;
1540 data->cancelled = 0;
1542 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1543 task = rpc_run_task(&task_setup_data);
1545 return PTR_ERR(task);
1546 status = nfs4_wait_for_completion_rpc_task(task);
1548 data->cancelled = 1;
1551 status = data->rpc_status;
1557 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1559 struct inode *dir = data->dir->d_inode;
1560 struct nfs_openres *o_res = &data->o_res;
1563 status = nfs4_run_open_task(data, 1);
1564 if (status != 0 || !data->rpc_done)
1567 nfs_refresh_inode(dir, o_res->dir_attr);
1569 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1570 status = _nfs4_proc_open_confirm(data);
1579 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1581 static int _nfs4_proc_open(struct nfs4_opendata *data)
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1589 status = nfs4_run_open_task(data, 0);
1590 if (status != 0 || !data->rpc_done)
1593 if (o_arg->open_flags & O_CREAT) {
1594 update_changeattr(dir, &o_res->cinfo);
1595 nfs_post_op_update_inode(dir, o_res->dir_attr);
1597 nfs_refresh_inode(dir, o_res->dir_attr);
1598 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1599 server->caps &= ~NFS_CAP_POSIX_LOCK;
1600 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1601 status = _nfs4_proc_open_confirm(data);
1605 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1606 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1610 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1615 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1616 ret = nfs4_wait_clnt_recover(clp);
1619 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1620 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1622 nfs4_schedule_state_manager(clp);
1628 static int nfs4_recover_expired_lease(struct nfs_server *server)
1630 return nfs4_client_recover_expired_lease(server->nfs_client);
1635 * reclaim state on the server after a network partition.
1636 * Assumes caller holds the appropriate lock
1638 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1640 struct nfs4_opendata *opendata;
1643 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1644 if (IS_ERR(opendata))
1645 return PTR_ERR(opendata);
1646 ret = nfs4_open_recover(opendata, state);
1648 d_drop(ctx->path.dentry);
1649 nfs4_opendata_put(opendata);
1653 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1655 struct nfs_server *server = NFS_SERVER(state->inode);
1656 struct nfs4_exception exception = { };
1660 err = _nfs4_open_expired(ctx, state);
1664 case -NFS4ERR_GRACE:
1665 case -NFS4ERR_DELAY:
1666 nfs4_handle_exception(server, err, &exception);
1669 } while (exception.retry);
1674 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1676 struct nfs_open_context *ctx;
1679 ctx = nfs4_state_find_open_context(state);
1681 return PTR_ERR(ctx);
1682 ret = nfs4_do_open_expired(ctx, state);
1683 put_nfs_open_context(ctx);
1688 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1689 * fields corresponding to attributes that were used to store the verifier.
1690 * Make sure we clobber those fields in the later setattr call
1692 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1694 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1695 !(sattr->ia_valid & ATTR_ATIME_SET))
1696 sattr->ia_valid |= ATTR_ATIME;
1698 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1699 !(sattr->ia_valid & ATTR_MTIME_SET))
1700 sattr->ia_valid |= ATTR_MTIME;
1704 * Returns a referenced nfs4_state
1706 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1708 struct nfs4_state_owner *sp;
1709 struct nfs4_state *state = NULL;
1710 struct nfs_server *server = NFS_SERVER(dir);
1711 struct nfs4_opendata *opendata;
1714 /* Protect against reboot recovery conflicts */
1716 if (!(sp = nfs4_get_state_owner(server, cred))) {
1717 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1720 status = nfs4_recover_expired_lease(server);
1722 goto err_put_state_owner;
1723 if (path->dentry->d_inode != NULL)
1724 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1726 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1727 if (opendata == NULL)
1728 goto err_put_state_owner;
1730 if (path->dentry->d_inode != NULL)
1731 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1733 status = _nfs4_proc_open(opendata);
1735 goto err_opendata_put;
1737 state = nfs4_opendata_to_nfs4_state(opendata);
1738 status = PTR_ERR(state);
1740 goto err_opendata_put;
1741 if (server->caps & NFS_CAP_POSIX_LOCK)
1742 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1744 if (opendata->o_arg.open_flags & O_EXCL) {
1745 nfs4_exclusive_attrset(opendata, sattr);
1747 nfs_fattr_init(opendata->o_res.f_attr);
1748 status = nfs4_do_setattr(state->inode, cred,
1749 opendata->o_res.f_attr, sattr,
1752 nfs_setattr_update_inode(state->inode, sattr);
1753 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1755 nfs4_opendata_put(opendata);
1756 nfs4_put_state_owner(sp);
1760 nfs4_opendata_put(opendata);
1761 err_put_state_owner:
1762 nfs4_put_state_owner(sp);
1769 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1771 struct nfs4_exception exception = { };
1772 struct nfs4_state *res;
1776 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1779 /* NOTE: BAD_SEQID means the server and client disagree about the
1780 * book-keeping w.r.t. state-changing operations
1781 * (OPEN/CLOSE/LOCK/LOCKU...)
1782 * It is actually a sign of a bug on the client or on the server.
1784 * If we receive a BAD_SEQID error in the particular case of
1785 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1786 * have unhashed the old state_owner for us, and that we can
1787 * therefore safely retry using a new one. We should still warn
1788 * the user though...
1790 if (status == -NFS4ERR_BAD_SEQID) {
1791 printk(KERN_WARNING "NFS: v4 server %s "
1792 " returned a bad sequence-id error!\n",
1793 NFS_SERVER(dir)->nfs_client->cl_hostname);
1794 exception.retry = 1;
1798 * BAD_STATEID on OPEN means that the server cancelled our
1799 * state before it received the OPEN_CONFIRM.
1800 * Recover by retrying the request as per the discussion
1801 * on Page 181 of RFC3530.
1803 if (status == -NFS4ERR_BAD_STATEID) {
1804 exception.retry = 1;
1807 if (status == -EAGAIN) {
1808 /* We must have found a delegation */
1809 exception.retry = 1;
1812 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1813 status, &exception));
1814 } while (exception.retry);
1818 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1819 struct nfs_fattr *fattr, struct iattr *sattr,
1820 struct nfs4_state *state)
1822 struct nfs_server *server = NFS_SERVER(inode);
1823 struct nfs_setattrargs arg = {
1824 .fh = NFS_FH(inode),
1827 .bitmask = server->attr_bitmask,
1829 struct nfs_setattrres res = {
1833 struct rpc_message msg = {
1834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1839 unsigned long timestamp = jiffies;
1842 nfs_fattr_init(fattr);
1844 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1845 /* Use that stateid */
1846 } else if (state != NULL) {
1847 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1849 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1851 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1852 if (status == 0 && state != NULL)
1853 renew_lease(server, timestamp);
1857 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1858 struct nfs_fattr *fattr, struct iattr *sattr,
1859 struct nfs4_state *state)
1861 struct nfs_server *server = NFS_SERVER(inode);
1862 struct nfs4_exception exception = { };
1865 err = nfs4_handle_exception(server,
1866 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1868 } while (exception.retry);
1872 struct nfs4_closedata {
1874 struct inode *inode;
1875 struct nfs4_state *state;
1876 struct nfs_closeargs arg;
1877 struct nfs_closeres res;
1878 struct nfs_fattr fattr;
1879 unsigned long timestamp;
1884 static void nfs4_free_closedata(void *data)
1886 struct nfs4_closedata *calldata = data;
1887 struct nfs4_state_owner *sp = calldata->state->owner;
1890 pnfs_roc_release(calldata->state->inode);
1891 nfs4_put_open_state(calldata->state);
1892 nfs_free_seqid(calldata->arg.seqid);
1893 nfs4_put_state_owner(sp);
1894 path_put(&calldata->path);
1898 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1901 spin_lock(&state->owner->so_lock);
1902 if (!(fmode & FMODE_READ))
1903 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1904 if (!(fmode & FMODE_WRITE))
1905 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1906 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1907 spin_unlock(&state->owner->so_lock);
1910 static void nfs4_close_done(struct rpc_task *task, void *data)
1912 struct nfs4_closedata *calldata = data;
1913 struct nfs4_state *state = calldata->state;
1914 struct nfs_server *server = NFS_SERVER(calldata->inode);
1916 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1918 /* hmm. we are done with the inode, and in the process of freeing
1919 * the state_owner. we keep this around to process errors
1921 switch (task->tk_status) {
1924 pnfs_roc_set_barrier(state->inode,
1925 calldata->roc_barrier);
1926 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1927 renew_lease(server, calldata->timestamp);
1928 nfs4_close_clear_stateid_flags(state,
1929 calldata->arg.fmode);
1931 case -NFS4ERR_STALE_STATEID:
1932 case -NFS4ERR_OLD_STATEID:
1933 case -NFS4ERR_BAD_STATEID:
1934 case -NFS4ERR_EXPIRED:
1935 if (calldata->arg.fmode == 0)
1938 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1939 rpc_restart_call_prepare(task);
1941 nfs_release_seqid(calldata->arg.seqid);
1942 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1945 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1947 struct nfs4_closedata *calldata = data;
1948 struct nfs4_state *state = calldata->state;
1951 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1954 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1955 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1956 spin_lock(&state->owner->so_lock);
1957 /* Calculate the change in open mode */
1958 if (state->n_rdwr == 0) {
1959 if (state->n_rdonly == 0) {
1960 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1961 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1962 calldata->arg.fmode &= ~FMODE_READ;
1964 if (state->n_wronly == 0) {
1965 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1966 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1967 calldata->arg.fmode &= ~FMODE_WRITE;
1970 spin_unlock(&state->owner->so_lock);
1973 /* Note: exit _without_ calling nfs4_close_done */
1974 task->tk_action = NULL;
1978 if (calldata->arg.fmode == 0) {
1979 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1980 if (calldata->roc &&
1981 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1982 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1988 nfs_fattr_init(calldata->res.fattr);
1989 calldata->timestamp = jiffies;
1990 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1991 &calldata->arg.seq_args, &calldata->res.seq_res,
1994 rpc_call_start(task);
1997 static const struct rpc_call_ops nfs4_close_ops = {
1998 .rpc_call_prepare = nfs4_close_prepare,
1999 .rpc_call_done = nfs4_close_done,
2000 .rpc_release = nfs4_free_closedata,
2004 * It is possible for data to be read/written from a mem-mapped file
2005 * after the sys_close call (which hits the vfs layer as a flush).
2006 * This means that we can't safely call nfsv4 close on a file until
2007 * the inode is cleared. This in turn means that we are not good
2008 * NFSv4 citizens - we do not indicate to the server to update the file's
2009 * share state even when we are done with one of the three share
2010 * stateid's in the inode.
2012 * NOTE: Caller must be holding the sp->so_owner semaphore!
2014 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2016 struct nfs_server *server = NFS_SERVER(state->inode);
2017 struct nfs4_closedata *calldata;
2018 struct nfs4_state_owner *sp = state->owner;
2019 struct rpc_task *task;
2020 struct rpc_message msg = {
2021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2022 .rpc_cred = state->owner->so_cred,
2024 struct rpc_task_setup task_setup_data = {
2025 .rpc_client = server->client,
2026 .rpc_message = &msg,
2027 .callback_ops = &nfs4_close_ops,
2028 .workqueue = nfsiod_workqueue,
2029 .flags = RPC_TASK_ASYNC,
2031 int status = -ENOMEM;
2033 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2034 if (calldata == NULL)
2036 calldata->inode = state->inode;
2037 calldata->state = state;
2038 calldata->arg.fh = NFS_FH(state->inode);
2039 calldata->arg.stateid = &state->open_stateid;
2040 /* Serialization for the sequence id */
2041 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2042 if (calldata->arg.seqid == NULL)
2043 goto out_free_calldata;
2044 calldata->arg.fmode = 0;
2045 calldata->arg.bitmask = server->cache_consistency_bitmask;
2046 calldata->res.fattr = &calldata->fattr;
2047 calldata->res.seqid = calldata->arg.seqid;
2048 calldata->res.server = server;
2049 calldata->roc = roc;
2051 calldata->path = *path;
2053 msg.rpc_argp = &calldata->arg;
2054 msg.rpc_resp = &calldata->res;
2055 task_setup_data.callback_data = calldata;
2056 task = rpc_run_task(&task_setup_data);
2058 return PTR_ERR(task);
2061 status = rpc_wait_for_completion_task(task);
2068 pnfs_roc_release(state->inode);
2069 nfs4_put_open_state(state);
2070 nfs4_put_state_owner(sp);
2074 static struct inode *
2075 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2077 struct nfs4_state *state;
2079 /* Protect against concurrent sillydeletes */
2080 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2082 return ERR_CAST(state);
2084 return igrab(state->inode);
2087 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2089 if (ctx->state == NULL)
2092 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2094 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2097 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2099 struct nfs4_server_caps_arg args = {
2102 struct nfs4_server_caps_res res = {};
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2110 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2112 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2113 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2114 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2115 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2116 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2117 NFS_CAP_CTIME|NFS_CAP_MTIME);
2118 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2119 server->caps |= NFS_CAP_ACLS;
2120 if (res.has_links != 0)
2121 server->caps |= NFS_CAP_HARDLINKS;
2122 if (res.has_symlinks != 0)
2123 server->caps |= NFS_CAP_SYMLINKS;
2124 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2125 server->caps |= NFS_CAP_FILEID;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2127 server->caps |= NFS_CAP_MODE;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2129 server->caps |= NFS_CAP_NLINK;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2131 server->caps |= NFS_CAP_OWNER;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2133 server->caps |= NFS_CAP_OWNER_GROUP;
2134 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2135 server->caps |= NFS_CAP_ATIME;
2136 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2137 server->caps |= NFS_CAP_CTIME;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2139 server->caps |= NFS_CAP_MTIME;
2141 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2142 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2143 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2144 server->acl_bitmask = res.acl_bitmask;
2150 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2152 struct nfs4_exception exception = { };
2155 err = nfs4_handle_exception(server,
2156 _nfs4_server_capabilities(server, fhandle),
2158 } while (exception.retry);
2162 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2163 struct nfs_fsinfo *info)
2165 struct nfs4_lookup_root_arg args = {
2166 .bitmask = nfs4_fattr_bitmap,
2168 struct nfs4_lookup_res res = {
2170 .fattr = info->fattr,
2173 struct rpc_message msg = {
2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2179 nfs_fattr_init(info->fattr);
2180 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2183 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2184 struct nfs_fsinfo *info)
2186 struct nfs4_exception exception = { };
2189 err = nfs4_handle_exception(server,
2190 _nfs4_lookup_root(server, fhandle, info),
2192 } while (exception.retry);
2196 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2197 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2199 struct rpc_auth *auth;
2202 auth = rpcauth_create(flavor, server->client);
2207 ret = nfs4_lookup_root(server, fhandle, info);
2212 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2213 struct nfs_fsinfo *info)
2215 int i, len, status = 0;
2216 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2218 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2219 flav_array[len] = RPC_AUTH_NULL;
2222 for (i = 0; i < len; i++) {
2223 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2224 if (status == -EPERM || status == -EACCES)
2232 * get the file handle for the "/" directory on the server
2234 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2235 struct nfs_fsinfo *info)
2237 int status = nfs4_lookup_root(server, fhandle, info);
2238 if ((status == -EPERM) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2239 status = nfs4_find_root_sec(server, fhandle, info);
2241 status = nfs4_server_capabilities(server, fhandle);
2243 status = nfs4_do_fsinfo(server, fhandle, info);
2244 return nfs4_map_errors(status);
2248 * Get locations and (maybe) other attributes of a referral.
2249 * Note that we'll actually follow the referral later when
2250 * we detect fsid mismatch in inode revalidation
2252 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2254 int status = -ENOMEM;
2255 struct page *page = NULL;
2256 struct nfs4_fs_locations *locations = NULL;
2258 page = alloc_page(GFP_KERNEL);
2261 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2262 if (locations == NULL)
2265 status = nfs4_proc_fs_locations(dir, name, locations, page);
2268 /* Make sure server returned a different fsid for the referral */
2269 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2270 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2275 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2276 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2278 fattr->mode = S_IFDIR;
2279 memset(fhandle, 0, sizeof(struct nfs_fh));
2287 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2289 struct nfs4_getattr_arg args = {
2291 .bitmask = server->attr_bitmask,
2293 struct nfs4_getattr_res res = {
2297 struct rpc_message msg = {
2298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2303 nfs_fattr_init(fattr);
2304 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2307 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2309 struct nfs4_exception exception = { };
2312 err = nfs4_handle_exception(server,
2313 _nfs4_proc_getattr(server, fhandle, fattr),
2315 } while (exception.retry);
2320 * The file is not closed if it is opened due to the a request to change
2321 * the size of the file. The open call will not be needed once the
2322 * VFS layer lookup-intents are implemented.
2324 * Close is called when the inode is destroyed.
2325 * If we haven't opened the file for O_WRONLY, we
2326 * need to in the size_change case to obtain a stateid.
2329 * Because OPEN is always done by name in nfsv4, it is
2330 * possible that we opened a different file by the same
2331 * name. We can recognize this race condition, but we
2332 * can't do anything about it besides returning an error.
2334 * This will be fixed with VFS changes (lookup-intent).
2337 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2338 struct iattr *sattr)
2340 struct inode *inode = dentry->d_inode;
2341 struct rpc_cred *cred = NULL;
2342 struct nfs4_state *state = NULL;
2345 nfs_fattr_init(fattr);
2347 /* Search for an existing open(O_WRITE) file */
2348 if (sattr->ia_valid & ATTR_FILE) {
2349 struct nfs_open_context *ctx;
2351 ctx = nfs_file_open_context(sattr->ia_file);
2358 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2360 nfs_setattr_update_inode(inode, sattr);
2364 static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2365 const struct nfs_fh *dirfh, const struct qstr *name,
2366 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2369 struct nfs4_lookup_arg args = {
2370 .bitmask = server->attr_bitmask,
2374 struct nfs4_lookup_res res = {
2379 struct rpc_message msg = {
2380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2385 nfs_fattr_init(fattr);
2387 dprintk("NFS call lookupfh %s\n", name->name);
2388 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2389 dprintk("NFS reply lookupfh: %d\n", status);
2393 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2394 struct qstr *name, struct nfs_fh *fhandle,
2395 struct nfs_fattr *fattr)
2397 struct nfs4_exception exception = { };
2400 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
2402 if (err == -NFS4ERR_MOVED) {
2406 err = nfs4_handle_exception(server, err, &exception);
2407 } while (exception.retry);
2411 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2412 const struct qstr *name, struct nfs_fh *fhandle,
2413 struct nfs_fattr *fattr)
2417 dprintk("NFS call lookup %s\n", name->name);
2418 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2419 if (status == -NFS4ERR_MOVED)
2420 status = nfs4_get_referral(dir, name, fattr, fhandle);
2421 dprintk("NFS reply lookup: %d\n", status);
2425 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2427 memset(fh, 0, sizeof(struct nfs_fh));
2428 fattr->fsid.major = 1;
2429 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2430 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2431 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2435 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2436 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2438 struct nfs4_exception exception = { };
2441 err = nfs4_handle_exception(NFS_SERVER(dir),
2442 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
2445 nfs_fixup_secinfo_attributes(fattr, fhandle);
2446 } while (exception.retry);
2450 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2452 struct nfs_server *server = NFS_SERVER(inode);
2453 struct nfs4_accessargs args = {
2454 .fh = NFS_FH(inode),
2455 .bitmask = server->attr_bitmask,
2457 struct nfs4_accessres res = {
2460 struct rpc_message msg = {
2461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2464 .rpc_cred = entry->cred,
2466 int mode = entry->mask;
2470 * Determine which access bits we want to ask for...
2472 if (mode & MAY_READ)
2473 args.access |= NFS4_ACCESS_READ;
2474 if (S_ISDIR(inode->i_mode)) {
2475 if (mode & MAY_WRITE)
2476 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2477 if (mode & MAY_EXEC)
2478 args.access |= NFS4_ACCESS_LOOKUP;
2480 if (mode & MAY_WRITE)
2481 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2482 if (mode & MAY_EXEC)
2483 args.access |= NFS4_ACCESS_EXECUTE;
2486 res.fattr = nfs_alloc_fattr();
2487 if (res.fattr == NULL)
2490 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2493 if (res.access & NFS4_ACCESS_READ)
2494 entry->mask |= MAY_READ;
2495 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2496 entry->mask |= MAY_WRITE;
2497 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2498 entry->mask |= MAY_EXEC;
2499 nfs_refresh_inode(inode, res.fattr);
2501 nfs_free_fattr(res.fattr);
2505 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2507 struct nfs4_exception exception = { };
2510 err = nfs4_handle_exception(NFS_SERVER(inode),
2511 _nfs4_proc_access(inode, entry),
2513 } while (exception.retry);
2518 * TODO: For the time being, we don't try to get any attributes
2519 * along with any of the zero-copy operations READ, READDIR,
2522 * In the case of the first three, we want to put the GETATTR
2523 * after the read-type operation -- this is because it is hard
2524 * to predict the length of a GETATTR response in v4, and thus
2525 * align the READ data correctly. This means that the GETATTR
2526 * may end up partially falling into the page cache, and we should
2527 * shift it into the 'tail' of the xdr_buf before processing.
2528 * To do this efficiently, we need to know the total length
2529 * of data received, which doesn't seem to be available outside
2532 * In the case of WRITE, we also want to put the GETATTR after
2533 * the operation -- in this case because we want to make sure
2534 * we get the post-operation mtime and size. This means that
2535 * we can't use xdr_encode_pages() as written: we need a variant
2536 * of it which would leave room in the 'tail' iovec.
2538 * Both of these changes to the XDR layer would in fact be quite
2539 * minor, but I decided to leave them for a subsequent patch.
2541 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2542 unsigned int pgbase, unsigned int pglen)
2544 struct nfs4_readlink args = {
2545 .fh = NFS_FH(inode),
2550 struct nfs4_readlink_res res;
2551 struct rpc_message msg = {
2552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2557 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2560 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2561 unsigned int pgbase, unsigned int pglen)
2563 struct nfs4_exception exception = { };
2566 err = nfs4_handle_exception(NFS_SERVER(inode),
2567 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2569 } while (exception.retry);
2575 * We will need to arrange for the VFS layer to provide an atomic open.
2576 * Until then, this create/open method is prone to inefficiency and race
2577 * conditions due to the lookup, create, and open VFS calls from sys_open()
2578 * placed on the wire.
2580 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2581 * The file will be opened again in the subsequent VFS open call
2582 * (nfs4_proc_file_open).
2584 * The open for read will just hang around to be used by any process that
2585 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2589 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2590 int flags, struct nfs_open_context *ctx)
2592 struct path my_path = {
2595 struct path *path = &my_path;
2596 struct nfs4_state *state;
2597 struct rpc_cred *cred = NULL;
2606 sattr->ia_mode &= ~current_umask();
2607 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2609 if (IS_ERR(state)) {
2610 status = PTR_ERR(state);
2613 d_add(dentry, igrab(state->inode));
2614 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2618 nfs4_close_sync(path, state, fmode);
2623 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2625 struct nfs_server *server = NFS_SERVER(dir);
2626 struct nfs_removeargs args = {
2628 .name.len = name->len,
2629 .name.name = name->name,
2630 .bitmask = server->attr_bitmask,
2632 struct nfs_removeres res = {
2635 struct rpc_message msg = {
2636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2640 int status = -ENOMEM;
2642 res.dir_attr = nfs_alloc_fattr();
2643 if (res.dir_attr == NULL)
2646 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2648 update_changeattr(dir, &res.cinfo);
2649 nfs_post_op_update_inode(dir, res.dir_attr);
2651 nfs_free_fattr(res.dir_attr);
2656 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2658 struct nfs4_exception exception = { };
2661 err = nfs4_handle_exception(NFS_SERVER(dir),
2662 _nfs4_proc_remove(dir, name),
2664 } while (exception.retry);
2668 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2670 struct nfs_server *server = NFS_SERVER(dir);
2671 struct nfs_removeargs *args = msg->rpc_argp;
2672 struct nfs_removeres *res = msg->rpc_resp;
2674 args->bitmask = server->cache_consistency_bitmask;
2675 res->server = server;
2676 res->seq_res.sr_slot = NULL;
2677 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2680 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2682 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2684 if (!nfs4_sequence_done(task, &res->seq_res))
2686 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2688 update_changeattr(dir, &res->cinfo);
2689 nfs_post_op_update_inode(dir, res->dir_attr);
2693 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2695 struct nfs_server *server = NFS_SERVER(dir);
2696 struct nfs_renameargs *arg = msg->rpc_argp;
2697 struct nfs_renameres *res = msg->rpc_resp;
2699 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2700 arg->bitmask = server->attr_bitmask;
2701 res->server = server;
2704 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2705 struct inode *new_dir)
2707 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2709 if (!nfs4_sequence_done(task, &res->seq_res))
2711 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2714 update_changeattr(old_dir, &res->old_cinfo);
2715 nfs_post_op_update_inode(old_dir, res->old_fattr);
2716 update_changeattr(new_dir, &res->new_cinfo);
2717 nfs_post_op_update_inode(new_dir, res->new_fattr);
2721 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2722 struct inode *new_dir, struct qstr *new_name)
2724 struct nfs_server *server = NFS_SERVER(old_dir);
2725 struct nfs_renameargs arg = {
2726 .old_dir = NFS_FH(old_dir),
2727 .new_dir = NFS_FH(new_dir),
2728 .old_name = old_name,
2729 .new_name = new_name,
2730 .bitmask = server->attr_bitmask,
2732 struct nfs_renameres res = {
2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2740 int status = -ENOMEM;
2742 res.old_fattr = nfs_alloc_fattr();
2743 res.new_fattr = nfs_alloc_fattr();
2744 if (res.old_fattr == NULL || res.new_fattr == NULL)
2747 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2749 update_changeattr(old_dir, &res.old_cinfo);
2750 nfs_post_op_update_inode(old_dir, res.old_fattr);
2751 update_changeattr(new_dir, &res.new_cinfo);
2752 nfs_post_op_update_inode(new_dir, res.new_fattr);
2755 nfs_free_fattr(res.new_fattr);
2756 nfs_free_fattr(res.old_fattr);
2760 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2761 struct inode *new_dir, struct qstr *new_name)
2763 struct nfs4_exception exception = { };
2766 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2767 _nfs4_proc_rename(old_dir, old_name,
2770 } while (exception.retry);
2774 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2776 struct nfs_server *server = NFS_SERVER(inode);
2777 struct nfs4_link_arg arg = {
2778 .fh = NFS_FH(inode),
2779 .dir_fh = NFS_FH(dir),
2781 .bitmask = server->attr_bitmask,
2783 struct nfs4_link_res res = {
2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2791 int status = -ENOMEM;
2793 res.fattr = nfs_alloc_fattr();
2794 res.dir_attr = nfs_alloc_fattr();
2795 if (res.fattr == NULL || res.dir_attr == NULL)
2798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2800 update_changeattr(dir, &res.cinfo);
2801 nfs_post_op_update_inode(dir, res.dir_attr);
2802 nfs_post_op_update_inode(inode, res.fattr);
2805 nfs_free_fattr(res.dir_attr);
2806 nfs_free_fattr(res.fattr);
2810 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2812 struct nfs4_exception exception = { };
2815 err = nfs4_handle_exception(NFS_SERVER(inode),
2816 _nfs4_proc_link(inode, dir, name),
2818 } while (exception.retry);
2822 struct nfs4_createdata {
2823 struct rpc_message msg;
2824 struct nfs4_create_arg arg;
2825 struct nfs4_create_res res;
2827 struct nfs_fattr fattr;
2828 struct nfs_fattr dir_fattr;
2831 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2832 struct qstr *name, struct iattr *sattr, u32 ftype)
2834 struct nfs4_createdata *data;
2836 data = kzalloc(sizeof(*data), GFP_KERNEL);
2838 struct nfs_server *server = NFS_SERVER(dir);
2840 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2841 data->msg.rpc_argp = &data->arg;
2842 data->msg.rpc_resp = &data->res;
2843 data->arg.dir_fh = NFS_FH(dir);
2844 data->arg.server = server;
2845 data->arg.name = name;
2846 data->arg.attrs = sattr;
2847 data->arg.ftype = ftype;
2848 data->arg.bitmask = server->attr_bitmask;
2849 data->res.server = server;
2850 data->res.fh = &data->fh;
2851 data->res.fattr = &data->fattr;
2852 data->res.dir_fattr = &data->dir_fattr;
2853 nfs_fattr_init(data->res.fattr);
2854 nfs_fattr_init(data->res.dir_fattr);
2859 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2861 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2862 &data->arg.seq_args, &data->res.seq_res, 1);
2864 update_changeattr(dir, &data->res.dir_cinfo);
2865 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2866 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2871 static void nfs4_free_createdata(struct nfs4_createdata *data)
2876 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2877 struct page *page, unsigned int len, struct iattr *sattr)
2879 struct nfs4_createdata *data;
2880 int status = -ENAMETOOLONG;
2882 if (len > NFS4_MAXPATHLEN)
2886 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2890 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2891 data->arg.u.symlink.pages = &page;
2892 data->arg.u.symlink.len = len;
2894 status = nfs4_do_create(dir, dentry, data);
2896 nfs4_free_createdata(data);
2901 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2902 struct page *page, unsigned int len, struct iattr *sattr)
2904 struct nfs4_exception exception = { };
2907 err = nfs4_handle_exception(NFS_SERVER(dir),
2908 _nfs4_proc_symlink(dir, dentry, page,
2911 } while (exception.retry);
2915 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2916 struct iattr *sattr)
2918 struct nfs4_createdata *data;
2919 int status = -ENOMEM;
2921 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2925 status = nfs4_do_create(dir, dentry, data);
2927 nfs4_free_createdata(data);
2932 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2933 struct iattr *sattr)
2935 struct nfs4_exception exception = { };
2938 sattr->ia_mode &= ~current_umask();
2940 err = nfs4_handle_exception(NFS_SERVER(dir),
2941 _nfs4_proc_mkdir(dir, dentry, sattr),
2943 } while (exception.retry);
2947 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2948 u64 cookie, struct page **pages, unsigned int count, int plus)
2950 struct inode *dir = dentry->d_inode;
2951 struct nfs4_readdir_arg args = {
2956 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2959 struct nfs4_readdir_res res;
2960 struct rpc_message msg = {
2961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2968 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2969 dentry->d_parent->d_name.name,
2970 dentry->d_name.name,
2971 (unsigned long long)cookie);
2972 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2973 res.pgbase = args.pgbase;
2974 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
2976 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2977 status += args.pgbase;
2980 nfs_invalidate_atime(dir);
2982 dprintk("%s: returns %d\n", __func__, status);
2986 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2987 u64 cookie, struct page **pages, unsigned int count, int plus)
2989 struct nfs4_exception exception = { };
2992 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2993 _nfs4_proc_readdir(dentry, cred, cookie,
2994 pages, count, plus),
2996 } while (exception.retry);
3000 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3001 struct iattr *sattr, dev_t rdev)
3003 struct nfs4_createdata *data;
3004 int mode = sattr->ia_mode;
3005 int status = -ENOMEM;
3007 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3008 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3010 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3015 data->arg.ftype = NF4FIFO;
3016 else if (S_ISBLK(mode)) {
3017 data->arg.ftype = NF4BLK;
3018 data->arg.u.device.specdata1 = MAJOR(rdev);
3019 data->arg.u.device.specdata2 = MINOR(rdev);
3021 else if (S_ISCHR(mode)) {
3022 data->arg.ftype = NF4CHR;
3023 data->arg.u.device.specdata1 = MAJOR(rdev);
3024 data->arg.u.device.specdata2 = MINOR(rdev);
3027 status = nfs4_do_create(dir, dentry, data);
3029 nfs4_free_createdata(data);
3034 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3035 struct iattr *sattr, dev_t rdev)
3037 struct nfs4_exception exception = { };
3040 sattr->ia_mode &= ~current_umask();
3042 err = nfs4_handle_exception(NFS_SERVER(dir),
3043 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3045 } while (exception.retry);
3049 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3050 struct nfs_fsstat *fsstat)
3052 struct nfs4_statfs_arg args = {
3054 .bitmask = server->attr_bitmask,
3056 struct nfs4_statfs_res res = {
3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3065 nfs_fattr_init(fsstat->fattr);
3066 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3069 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3071 struct nfs4_exception exception = { };
3074 err = nfs4_handle_exception(server,
3075 _nfs4_proc_statfs(server, fhandle, fsstat),
3077 } while (exception.retry);
3081 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3082 struct nfs_fsinfo *fsinfo)
3084 struct nfs4_fsinfo_arg args = {
3086 .bitmask = server->attr_bitmask,
3088 struct nfs4_fsinfo_res res = {
3091 struct rpc_message msg = {
3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3097 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3100 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3102 struct nfs4_exception exception = { };
3106 err = nfs4_handle_exception(server,
3107 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3109 } while (exception.retry);
3113 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3115 nfs_fattr_init(fsinfo->fattr);
3116 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3119 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3120 struct nfs_pathconf *pathconf)
3122 struct nfs4_pathconf_arg args = {
3124 .bitmask = server->attr_bitmask,
3126 struct nfs4_pathconf_res res = {
3127 .pathconf = pathconf,
3129 struct rpc_message msg = {
3130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3135 /* None of the pathconf attributes are mandatory to implement */
3136 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3137 memset(pathconf, 0, sizeof(*pathconf));
3141 nfs_fattr_init(pathconf->fattr);
3142 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3145 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3146 struct nfs_pathconf *pathconf)
3148 struct nfs4_exception exception = { };
3152 err = nfs4_handle_exception(server,
3153 _nfs4_proc_pathconf(server, fhandle, pathconf),
3155 } while (exception.retry);
3159 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3161 struct nfs_server *server = NFS_SERVER(data->inode);
3163 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3164 nfs_restart_rpc(task, server->nfs_client);
3168 nfs_invalidate_atime(data->inode);
3169 if (task->tk_status > 0)
3170 renew_lease(server, data->timestamp);
3174 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3177 dprintk("--> %s\n", __func__);
3179 if (!nfs4_sequence_done(task, &data->res.seq_res))
3182 return data->read_done_cb(task, data);
3185 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3187 data->timestamp = jiffies;
3188 data->read_done_cb = nfs4_read_done_cb;
3189 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3192 /* Reset the the nfs_read_data to send the read to the MDS. */
3193 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3195 dprintk("%s Reset task for i/o through\n", __func__);
3196 put_lseg(data->lseg);
3198 /* offsets will differ in the dense stripe case */
3199 data->args.offset = data->mds_offset;
3200 data->ds_clp = NULL;
3201 data->args.fh = NFS_FH(data->inode);
3202 data->read_done_cb = nfs4_read_done_cb;
3203 task->tk_ops = data->mds_ops;
3204 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3206 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3208 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3210 struct inode *inode = data->inode;
3212 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3213 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3216 if (task->tk_status >= 0) {
3217 renew_lease(NFS_SERVER(inode), data->timestamp);
3218 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3223 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3225 if (!nfs4_sequence_done(task, &data->res.seq_res))
3227 return data->write_done_cb(task, data);
3230 /* Reset the the nfs_write_data to send the write to the MDS. */
3231 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3233 dprintk("%s Reset task for i/o through\n", __func__);
3234 put_lseg(data->lseg);
3236 data->ds_clp = NULL;
3237 data->write_done_cb = nfs4_write_done_cb;
3238 data->args.fh = NFS_FH(data->inode);
3239 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3240 data->args.offset = data->mds_offset;
3241 data->res.fattr = &data->fattr;
3242 task->tk_ops = data->mds_ops;
3243 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3245 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3247 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3249 struct nfs_server *server = NFS_SERVER(data->inode);
3252 data->args.bitmask = NULL;
3253 data->res.fattr = NULL;
3255 data->args.bitmask = server->cache_consistency_bitmask;
3256 if (!data->write_done_cb)
3257 data->write_done_cb = nfs4_write_done_cb;
3258 data->res.server = server;
3259 data->timestamp = jiffies;
3261 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3264 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3266 struct inode *inode = data->inode;
3268 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3269 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3272 nfs_refresh_inode(inode, data->res.fattr);
3276 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3278 if (!nfs4_sequence_done(task, &data->res.seq_res))
3280 return data->write_done_cb(task, data);
3283 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3285 struct nfs_server *server = NFS_SERVER(data->inode);
3288 data->args.bitmask = NULL;
3289 data->res.fattr = NULL;
3291 data->args.bitmask = server->cache_consistency_bitmask;
3292 if (!data->write_done_cb)
3293 data->write_done_cb = nfs4_commit_done_cb;
3294 data->res.server = server;
3295 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3298 struct nfs4_renewdata {
3299 struct nfs_client *client;
3300 unsigned long timestamp;
3304 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3305 * standalone procedure for queueing an asynchronous RENEW.
3307 static void nfs4_renew_release(void *calldata)
3309 struct nfs4_renewdata *data = calldata;
3310 struct nfs_client *clp = data->client;
3312 if (atomic_read(&clp->cl_count) > 1)
3313 nfs4_schedule_state_renewal(clp);
3314 nfs_put_client(clp);
3318 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3320 struct nfs4_renewdata *data = calldata;
3321 struct nfs_client *clp = data->client;
3322 unsigned long timestamp = data->timestamp;
3324 if (task->tk_status < 0) {
3325 /* Unless we're shutting down, schedule state recovery! */
3326 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3327 nfs4_schedule_lease_recovery(clp);
3330 do_renew_lease(clp, timestamp);
3333 static const struct rpc_call_ops nfs4_renew_ops = {
3334 .rpc_call_done = nfs4_renew_done,
3335 .rpc_release = nfs4_renew_release,
3338 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3340 struct rpc_message msg = {
3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3345 struct nfs4_renewdata *data;
3347 if (!atomic_inc_not_zero(&clp->cl_count))
3349 data = kmalloc(sizeof(*data), GFP_KERNEL);
3353 data->timestamp = jiffies;
3354 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3355 &nfs4_renew_ops, data);
3358 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3360 struct rpc_message msg = {
3361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3365 unsigned long now = jiffies;
3368 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3371 do_renew_lease(clp, now);
3375 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3377 return (server->caps & NFS_CAP_ACLS)
3378 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3379 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3382 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3383 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3386 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3388 static void buf_to_pages(const void *buf, size_t buflen,
3389 struct page **pages, unsigned int *pgbase)
3391 const void *p = buf;
3393 *pgbase = offset_in_page(buf);
3395 while (p < buf + buflen) {
3396 *(pages++) = virt_to_page(p);
3397 p += PAGE_CACHE_SIZE;
3401 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3402 struct page **pages, unsigned int *pgbase)
3404 struct page *newpage, **spages;
3410 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3411 newpage = alloc_page(GFP_KERNEL);
3413 if (newpage == NULL)
3415 memcpy(page_address(newpage), buf, len);
3420 } while (buflen != 0);
3426 __free_page(spages[rc-1]);
3430 struct nfs4_cached_acl {
3436 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3438 struct nfs_inode *nfsi = NFS_I(inode);
3440 spin_lock(&inode->i_lock);
3441 kfree(nfsi->nfs4_acl);
3442 nfsi->nfs4_acl = acl;
3443 spin_unlock(&inode->i_lock);
3446 static void nfs4_zap_acl_attr(struct inode *inode)
3448 nfs4_set_cached_acl(inode, NULL);
3451 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3453 struct nfs_inode *nfsi = NFS_I(inode);
3454 struct nfs4_cached_acl *acl;
3457 spin_lock(&inode->i_lock);
3458 acl = nfsi->nfs4_acl;
3461 if (buf == NULL) /* user is just asking for length */
3463 if (acl->cached == 0)
3465 ret = -ERANGE; /* see getxattr(2) man page */
3466 if (acl->len > buflen)
3468 memcpy(buf, acl->data, acl->len);
3472 spin_unlock(&inode->i_lock);
3476 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3478 struct nfs4_cached_acl *acl;
3480 if (buf && acl_len <= PAGE_SIZE) {
3481 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3485 memcpy(acl->data, buf, acl_len);
3487 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3494 nfs4_set_cached_acl(inode, acl);
3497 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3499 struct page *pages[NFS4ACL_MAXPAGES];
3500 struct nfs_getaclargs args = {
3501 .fh = NFS_FH(inode),
3505 struct nfs_getaclres res = {
3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3514 struct page *localpage = NULL;
3517 if (buflen < PAGE_SIZE) {
3518 /* As long as we're doing a round trip to the server anyway,
3519 * let's be prepared for a page of acl data. */
3520 localpage = alloc_page(GFP_KERNEL);
3521 resp_buf = page_address(localpage);
3522 if (localpage == NULL)
3524 args.acl_pages[0] = localpage;
3525 args.acl_pgbase = 0;
3526 args.acl_len = PAGE_SIZE;
3529 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3531 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3534 if (res.acl_len > args.acl_len)
3535 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3537 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3540 if (res.acl_len > buflen)
3543 memcpy(buf, resp_buf, res.acl_len);
3548 __free_page(localpage);
3552 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3554 struct nfs4_exception exception = { };
3557 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3560 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3561 } while (exception.retry);
3565 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3567 struct nfs_server *server = NFS_SERVER(inode);
3570 if (!nfs4_server_supports_acls(server))
3572 ret = nfs_revalidate_inode(server, inode);
3575 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3576 nfs_zap_acl_cache(inode);
3577 ret = nfs4_read_cached_acl(inode, buf, buflen);
3580 return nfs4_get_acl_uncached(inode, buf, buflen);
3583 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3585 struct nfs_server *server = NFS_SERVER(inode);
3586 struct page *pages[NFS4ACL_MAXPAGES];
3587 struct nfs_setaclargs arg = {
3588 .fh = NFS_FH(inode),
3592 struct nfs_setaclres res;
3593 struct rpc_message msg = {
3594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3600 if (!nfs4_server_supports_acls(server))
3602 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3605 nfs_inode_return_delegation(inode);
3606 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3609 * Free each page after tx, so the only ref left is
3610 * held by the network stack
3613 put_page(pages[i-1]);
3616 * Acl update can result in inode attribute update.
3617 * so mark the attribute cache invalid.
3619 spin_lock(&inode->i_lock);
3620 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3621 spin_unlock(&inode->i_lock);
3622 nfs_access_zap_cache(inode);
3623 nfs_zap_acl_cache(inode);
3627 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3629 struct nfs4_exception exception = { };
3632 err = nfs4_handle_exception(NFS_SERVER(inode),
3633 __nfs4_proc_set_acl(inode, buf, buflen),
3635 } while (exception.retry);
3640 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3642 struct nfs_client *clp = server->nfs_client;
3644 if (task->tk_status >= 0)
3646 switch(task->tk_status) {
3647 case -NFS4ERR_ADMIN_REVOKED:
3648 case -NFS4ERR_BAD_STATEID:
3649 case -NFS4ERR_OPENMODE:
3652 nfs4_schedule_stateid_recovery(server, state);
3653 goto wait_on_recovery;
3654 case -NFS4ERR_STALE_STATEID:
3655 case -NFS4ERR_STALE_CLIENTID:
3656 case -NFS4ERR_EXPIRED:
3657 nfs4_schedule_lease_recovery(clp);
3658 goto wait_on_recovery;
3659 #if defined(CONFIG_NFS_V4_1)
3660 case -NFS4ERR_BADSESSION:
3661 case -NFS4ERR_BADSLOT:
3662 case -NFS4ERR_BAD_HIGH_SLOT:
3663 case -NFS4ERR_DEADSESSION:
3664 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3665 case -NFS4ERR_SEQ_FALSE_RETRY:
3666 case -NFS4ERR_SEQ_MISORDERED:
3667 dprintk("%s ERROR %d, Reset session\n", __func__,
3669 nfs4_schedule_session_recovery(clp->cl_session);
3670 task->tk_status = 0;
3672 #endif /* CONFIG_NFS_V4_1 */
3673 case -NFS4ERR_DELAY:
3674 nfs_inc_server_stats(server, NFSIOS_DELAY);
3675 case -NFS4ERR_GRACE:
3677 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3678 task->tk_status = 0;
3680 case -NFS4ERR_OLD_STATEID:
3681 task->tk_status = 0;
3684 task->tk_status = nfs4_map_errors(task->tk_status);
3687 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3688 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3689 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3690 task->tk_status = 0;
3694 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3695 unsigned short port, struct rpc_cred *cred,
3696 struct nfs4_setclientid_res *res)
3698 nfs4_verifier sc_verifier;
3699 struct nfs4_setclientid setclientid = {
3700 .sc_verifier = &sc_verifier,
3702 .sc_cb_ident = clp->cl_cb_ident,
3704 struct rpc_message msg = {
3705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3706 .rpc_argp = &setclientid,
3714 p = (__be32*)sc_verifier.data;
3715 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3716 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3719 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3720 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3722 rpc_peeraddr2str(clp->cl_rpcclient,
3724 rpc_peeraddr2str(clp->cl_rpcclient,
3726 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3727 clp->cl_id_uniquifier);
3728 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3729 sizeof(setclientid.sc_netid),
3730 rpc_peeraddr2str(clp->cl_rpcclient,
3731 RPC_DISPLAY_NETID));
3732 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3733 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3734 clp->cl_ipaddr, port >> 8, port & 255);
3736 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3737 if (status != -NFS4ERR_CLID_INUSE)
3742 ssleep(clp->cl_lease_time / HZ + 1);
3744 if (++clp->cl_id_uniquifier == 0)
3750 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3751 struct nfs4_setclientid_res *arg,
3752 struct rpc_cred *cred)
3754 struct nfs_fsinfo fsinfo;
3755 struct rpc_message msg = {
3756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3758 .rpc_resp = &fsinfo,
3765 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3767 spin_lock(&clp->cl_lock);
3768 clp->cl_lease_time = fsinfo.lease_time * HZ;
3769 clp->cl_last_renewal = now;
3770 spin_unlock(&clp->cl_lock);
3775 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3776 struct nfs4_setclientid_res *arg,
3777 struct rpc_cred *cred)
3782 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3786 case -NFS4ERR_RESOURCE:
3787 /* The IBM lawyers misread another document! */
3788 case -NFS4ERR_DELAY:
3789 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3795 struct nfs4_delegreturndata {
3796 struct nfs4_delegreturnargs args;
3797 struct nfs4_delegreturnres res;
3799 nfs4_stateid stateid;
3800 unsigned long timestamp;
3801 struct nfs_fattr fattr;
3805 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3807 struct nfs4_delegreturndata *data = calldata;
3809 if (!nfs4_sequence_done(task, &data->res.seq_res))
3812 switch (task->tk_status) {
3813 case -NFS4ERR_STALE_STATEID:
3814 case -NFS4ERR_EXPIRED:
3816 renew_lease(data->res.server, data->timestamp);
3819 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3821 nfs_restart_rpc(task, data->res.server->nfs_client);
3825 data->rpc_status = task->tk_status;
3828 static void nfs4_delegreturn_release(void *calldata)
3833 #if defined(CONFIG_NFS_V4_1)
3834 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3836 struct nfs4_delegreturndata *d_data;
3838 d_data = (struct nfs4_delegreturndata *)data;
3840 if (nfs4_setup_sequence(d_data->res.server,
3841 &d_data->args.seq_args,
3842 &d_data->res.seq_res, 1, task))
3844 rpc_call_start(task);
3846 #endif /* CONFIG_NFS_V4_1 */
3848 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3849 #if defined(CONFIG_NFS_V4_1)
3850 .rpc_call_prepare = nfs4_delegreturn_prepare,
3851 #endif /* CONFIG_NFS_V4_1 */
3852 .rpc_call_done = nfs4_delegreturn_done,
3853 .rpc_release = nfs4_delegreturn_release,
3856 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3858 struct nfs4_delegreturndata *data;
3859 struct nfs_server *server = NFS_SERVER(inode);
3860 struct rpc_task *task;
3861 struct rpc_message msg = {
3862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3865 struct rpc_task_setup task_setup_data = {
3866 .rpc_client = server->client,
3867 .rpc_message = &msg,
3868 .callback_ops = &nfs4_delegreturn_ops,
3869 .flags = RPC_TASK_ASYNC,
3873 data = kzalloc(sizeof(*data), GFP_NOFS);
3876 data->args.fhandle = &data->fh;
3877 data->args.stateid = &data->stateid;
3878 data->args.bitmask = server->attr_bitmask;
3879 nfs_copy_fh(&data->fh, NFS_FH(inode));
3880 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3881 data->res.fattr = &data->fattr;
3882 data->res.server = server;
3883 nfs_fattr_init(data->res.fattr);
3884 data->timestamp = jiffies;
3885 data->rpc_status = 0;
3887 task_setup_data.callback_data = data;
3888 msg.rpc_argp = &data->args;
3889 msg.rpc_resp = &data->res;
3890 task = rpc_run_task(&task_setup_data);
3892 return PTR_ERR(task);
3895 status = nfs4_wait_for_completion_rpc_task(task);
3898 status = data->rpc_status;
3901 nfs_refresh_inode(inode, &data->fattr);
3907 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3909 struct nfs_server *server = NFS_SERVER(inode);
3910 struct nfs4_exception exception = { };
3913 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3915 case -NFS4ERR_STALE_STATEID:
3916 case -NFS4ERR_EXPIRED:
3920 err = nfs4_handle_exception(server, err, &exception);
3921 } while (exception.retry);
3925 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3926 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3929 * sleep, with exponential backoff, and retry the LOCK operation.
3931 static unsigned long
3932 nfs4_set_lock_task_retry(unsigned long timeout)
3934 schedule_timeout_killable(timeout);
3936 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3937 return NFS4_LOCK_MAXTIMEOUT;
3941 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3943 struct inode *inode = state->inode;
3944 struct nfs_server *server = NFS_SERVER(inode);
3945 struct nfs_client *clp = server->nfs_client;
3946 struct nfs_lockt_args arg = {
3947 .fh = NFS_FH(inode),
3950 struct nfs_lockt_res res = {
3953 struct rpc_message msg = {
3954 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3957 .rpc_cred = state->owner->so_cred,
3959 struct nfs4_lock_state *lsp;
3962 arg.lock_owner.clientid = clp->cl_clientid;
3963 status = nfs4_set_lock_state(state, request);
3966 lsp = request->fl_u.nfs4_fl.owner;
3967 arg.lock_owner.id = lsp->ls_id.id;
3968 arg.lock_owner.s_dev = server->s_dev;
3969 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3972 request->fl_type = F_UNLCK;
3974 case -NFS4ERR_DENIED:
3977 request->fl_ops->fl_release_private(request);
3982 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3984 struct nfs4_exception exception = { };
3988 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3989 _nfs4_proc_getlk(state, cmd, request),
3991 } while (exception.retry);
3995 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3998 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4000 res = posix_lock_file_wait(file, fl);
4003 res = flock_lock_file_wait(file, fl);
4011 struct nfs4_unlockdata {
4012 struct nfs_locku_args arg;
4013 struct nfs_locku_res res;
4014 struct nfs4_lock_state *lsp;
4015 struct nfs_open_context *ctx;
4016 struct file_lock fl;
4017 const struct nfs_server *server;
4018 unsigned long timestamp;
4021 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4022 struct nfs_open_context *ctx,
4023 struct nfs4_lock_state *lsp,
4024 struct nfs_seqid *seqid)
4026 struct nfs4_unlockdata *p;
4027 struct inode *inode = lsp->ls_state->inode;
4029 p = kzalloc(sizeof(*p), GFP_NOFS);
4032 p->arg.fh = NFS_FH(inode);
4034 p->arg.seqid = seqid;
4035 p->res.seqid = seqid;
4036 p->arg.stateid = &lsp->ls_stateid;
4038 atomic_inc(&lsp->ls_count);
4039 /* Ensure we don't close file until we're done freeing locks! */
4040 p->ctx = get_nfs_open_context(ctx);
4041 memcpy(&p->fl, fl, sizeof(p->fl));
4042 p->server = NFS_SERVER(inode);
4046 static void nfs4_locku_release_calldata(void *data)
4048 struct nfs4_unlockdata *calldata = data;
4049 nfs_free_seqid(calldata->arg.seqid);
4050 nfs4_put_lock_state(calldata->lsp);
4051 put_nfs_open_context(calldata->ctx);
4055 static void nfs4_locku_done(struct rpc_task *task, void *data)
4057 struct nfs4_unlockdata *calldata = data;
4059 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4061 switch (task->tk_status) {
4063 memcpy(calldata->lsp->ls_stateid.data,
4064 calldata->res.stateid.data,
4065 sizeof(calldata->lsp->ls_stateid.data));
4066 renew_lease(calldata->server, calldata->timestamp);
4068 case -NFS4ERR_BAD_STATEID:
4069 case -NFS4ERR_OLD_STATEID:
4070 case -NFS4ERR_STALE_STATEID:
4071 case -NFS4ERR_EXPIRED:
4074 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4075 nfs_restart_rpc(task,
4076 calldata->server->nfs_client);
4080 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4082 struct nfs4_unlockdata *calldata = data;
4084 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4086 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4087 /* Note: exit _without_ running nfs4_locku_done */
4088 task->tk_action = NULL;
4091 calldata->timestamp = jiffies;
4092 if (nfs4_setup_sequence(calldata->server,
4093 &calldata->arg.seq_args,
4094 &calldata->res.seq_res, 1, task))
4096 rpc_call_start(task);
4099 static const struct rpc_call_ops nfs4_locku_ops = {
4100 .rpc_call_prepare = nfs4_locku_prepare,
4101 .rpc_call_done = nfs4_locku_done,
4102 .rpc_release = nfs4_locku_release_calldata,
4105 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4106 struct nfs_open_context *ctx,
4107 struct nfs4_lock_state *lsp,
4108 struct nfs_seqid *seqid)
4110 struct nfs4_unlockdata *data;
4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4113 .rpc_cred = ctx->cred,
4115 struct rpc_task_setup task_setup_data = {
4116 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4117 .rpc_message = &msg,
4118 .callback_ops = &nfs4_locku_ops,
4119 .workqueue = nfsiod_workqueue,
4120 .flags = RPC_TASK_ASYNC,
4123 /* Ensure this is an unlock - when canceling a lock, the
4124 * canceled lock is passed in, and it won't be an unlock.
4126 fl->fl_type = F_UNLCK;
4128 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4130 nfs_free_seqid(seqid);
4131 return ERR_PTR(-ENOMEM);
4134 msg.rpc_argp = &data->arg;
4135 msg.rpc_resp = &data->res;
4136 task_setup_data.callback_data = data;
4137 return rpc_run_task(&task_setup_data);
4140 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4142 struct nfs_inode *nfsi = NFS_I(state->inode);
4143 struct nfs_seqid *seqid;
4144 struct nfs4_lock_state *lsp;
4145 struct rpc_task *task;
4147 unsigned char fl_flags = request->fl_flags;
4149 status = nfs4_set_lock_state(state, request);
4150 /* Unlock _before_ we do the RPC call */
4151 request->fl_flags |= FL_EXISTS;
4152 down_read(&nfsi->rwsem);
4153 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4154 up_read(&nfsi->rwsem);
4157 up_read(&nfsi->rwsem);
4160 /* Is this a delegated lock? */
4161 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4163 lsp = request->fl_u.nfs4_fl.owner;
4164 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4168 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4169 status = PTR_ERR(task);
4172 status = nfs4_wait_for_completion_rpc_task(task);
4175 request->fl_flags = fl_flags;
4179 struct nfs4_lockdata {
4180 struct nfs_lock_args arg;
4181 struct nfs_lock_res res;
4182 struct nfs4_lock_state *lsp;
4183 struct nfs_open_context *ctx;
4184 struct file_lock fl;
4185 unsigned long timestamp;
4188 struct nfs_server *server;
4191 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4192 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4195 struct nfs4_lockdata *p;
4196 struct inode *inode = lsp->ls_state->inode;
4197 struct nfs_server *server = NFS_SERVER(inode);
4199 p = kzalloc(sizeof(*p), gfp_mask);
4203 p->arg.fh = NFS_FH(inode);
4205 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4206 if (p->arg.open_seqid == NULL)
4208 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4209 if (p->arg.lock_seqid == NULL)
4210 goto out_free_seqid;
4211 p->arg.lock_stateid = &lsp->ls_stateid;
4212 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4213 p->arg.lock_owner.id = lsp->ls_id.id;
4214 p->arg.lock_owner.s_dev = server->s_dev;
4215 p->res.lock_seqid = p->arg.lock_seqid;
4218 atomic_inc(&lsp->ls_count);
4219 p->ctx = get_nfs_open_context(ctx);
4220 memcpy(&p->fl, fl, sizeof(p->fl));
4223 nfs_free_seqid(p->arg.open_seqid);
4229 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4231 struct nfs4_lockdata *data = calldata;
4232 struct nfs4_state *state = data->lsp->ls_state;
4234 dprintk("%s: begin!\n", __func__);
4235 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4237 /* Do we need to do an open_to_lock_owner? */
4238 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4239 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4241 data->arg.open_stateid = &state->stateid;
4242 data->arg.new_lock_owner = 1;
4243 data->res.open_seqid = data->arg.open_seqid;
4245 data->arg.new_lock_owner = 0;
4246 data->timestamp = jiffies;
4247 if (nfs4_setup_sequence(data->server,
4248 &data->arg.seq_args,
4249 &data->res.seq_res, 1, task))
4251 rpc_call_start(task);
4252 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4255 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4257 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4258 nfs4_lock_prepare(task, calldata);
4261 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4263 struct nfs4_lockdata *data = calldata;
4265 dprintk("%s: begin!\n", __func__);
4267 if (!nfs4_sequence_done(task, &data->res.seq_res))
4270 data->rpc_status = task->tk_status;
4271 if (data->arg.new_lock_owner != 0) {
4272 if (data->rpc_status == 0)
4273 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4277 if (data->rpc_status == 0) {
4278 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4279 sizeof(data->lsp->ls_stateid.data));
4280 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4281 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4284 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4287 static void nfs4_lock_release(void *calldata)
4289 struct nfs4_lockdata *data = calldata;
4291 dprintk("%s: begin!\n", __func__);
4292 nfs_free_seqid(data->arg.open_seqid);
4293 if (data->cancelled != 0) {
4294 struct rpc_task *task;
4295 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4296 data->arg.lock_seqid);
4298 rpc_put_task_async(task);
4299 dprintk("%s: cancelling lock!\n", __func__);
4301 nfs_free_seqid(data->arg.lock_seqid);
4302 nfs4_put_lock_state(data->lsp);
4303 put_nfs_open_context(data->ctx);
4305 dprintk("%s: done!\n", __func__);
4308 static const struct rpc_call_ops nfs4_lock_ops = {
4309 .rpc_call_prepare = nfs4_lock_prepare,
4310 .rpc_call_done = nfs4_lock_done,
4311 .rpc_release = nfs4_lock_release,
4314 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4315 .rpc_call_prepare = nfs4_recover_lock_prepare,
4316 .rpc_call_done = nfs4_lock_done,
4317 .rpc_release = nfs4_lock_release,
4320 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4323 case -NFS4ERR_ADMIN_REVOKED:
4324 case -NFS4ERR_BAD_STATEID:
4325 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4326 if (new_lock_owner != 0 ||
4327 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4328 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4330 case -NFS4ERR_STALE_STATEID:
4331 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4332 case -NFS4ERR_EXPIRED:
4333 nfs4_schedule_lease_recovery(server->nfs_client);
4337 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4339 struct nfs4_lockdata *data;
4340 struct rpc_task *task;
4341 struct rpc_message msg = {
4342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4343 .rpc_cred = state->owner->so_cred,
4345 struct rpc_task_setup task_setup_data = {
4346 .rpc_client = NFS_CLIENT(state->inode),
4347 .rpc_message = &msg,
4348 .callback_ops = &nfs4_lock_ops,
4349 .workqueue = nfsiod_workqueue,
4350 .flags = RPC_TASK_ASYNC,
4354 dprintk("%s: begin!\n", __func__);
4355 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4356 fl->fl_u.nfs4_fl.owner,
4357 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4361 data->arg.block = 1;
4362 if (recovery_type > NFS_LOCK_NEW) {
4363 if (recovery_type == NFS_LOCK_RECLAIM)
4364 data->arg.reclaim = NFS_LOCK_RECLAIM;
4365 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4367 msg.rpc_argp = &data->arg;
4368 msg.rpc_resp = &data->res;
4369 task_setup_data.callback_data = data;
4370 task = rpc_run_task(&task_setup_data);
4372 return PTR_ERR(task);
4373 ret = nfs4_wait_for_completion_rpc_task(task);
4375 ret = data->rpc_status;
4377 nfs4_handle_setlk_error(data->server, data->lsp,
4378 data->arg.new_lock_owner, ret);
4380 data->cancelled = 1;
4382 dprintk("%s: done, ret = %d!\n", __func__, ret);
4386 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4388 struct nfs_server *server = NFS_SERVER(state->inode);
4389 struct nfs4_exception exception = { };
4393 /* Cache the lock if possible... */
4394 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4396 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4397 if (err != -NFS4ERR_DELAY)
4399 nfs4_handle_exception(server, err, &exception);
4400 } while (exception.retry);
4404 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4406 struct nfs_server *server = NFS_SERVER(state->inode);
4407 struct nfs4_exception exception = { };
4410 err = nfs4_set_lock_state(state, request);
4414 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4416 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4420 case -NFS4ERR_GRACE:
4421 case -NFS4ERR_DELAY:
4422 nfs4_handle_exception(server, err, &exception);
4425 } while (exception.retry);
4430 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4432 struct nfs_inode *nfsi = NFS_I(state->inode);
4433 unsigned char fl_flags = request->fl_flags;
4434 int status = -ENOLCK;
4436 if ((fl_flags & FL_POSIX) &&
4437 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4439 /* Is this a delegated open? */
4440 status = nfs4_set_lock_state(state, request);
4443 request->fl_flags |= FL_ACCESS;
4444 status = do_vfs_lock(request->fl_file, request);
4447 down_read(&nfsi->rwsem);
4448 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4449 /* Yes: cache locks! */
4450 /* ...but avoid races with delegation recall... */
4451 request->fl_flags = fl_flags & ~FL_SLEEP;
4452 status = do_vfs_lock(request->fl_file, request);
4455 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4458 /* Note: we always want to sleep here! */
4459 request->fl_flags = fl_flags | FL_SLEEP;
4460 if (do_vfs_lock(request->fl_file, request) < 0)
4461 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4463 up_read(&nfsi->rwsem);
4465 request->fl_flags = fl_flags;
4469 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4471 struct nfs4_exception exception = { };
4475 err = _nfs4_proc_setlk(state, cmd, request);
4476 if (err == -NFS4ERR_DENIED)
4478 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4480 } while (exception.retry);
4485 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4487 struct nfs_open_context *ctx;
4488 struct nfs4_state *state;
4489 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4492 /* verify open state */
4493 ctx = nfs_file_open_context(filp);
4496 if (request->fl_start < 0 || request->fl_end < 0)
4499 if (IS_GETLK(cmd)) {
4501 return nfs4_proc_getlk(state, F_GETLK, request);
4505 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4508 if (request->fl_type == F_UNLCK) {
4510 return nfs4_proc_unlck(state, cmd, request);
4517 status = nfs4_proc_setlk(state, cmd, request);
4518 if ((status != -EAGAIN) || IS_SETLK(cmd))
4520 timeout = nfs4_set_lock_task_retry(timeout);
4521 status = -ERESTARTSYS;
4524 } while(status < 0);
4528 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4530 struct nfs_server *server = NFS_SERVER(state->inode);
4531 struct nfs4_exception exception = { };
4534 err = nfs4_set_lock_state(state, fl);
4538 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4541 printk(KERN_ERR "%s: unhandled error %d.\n",
4546 case -NFS4ERR_EXPIRED:
4547 case -NFS4ERR_STALE_CLIENTID:
4548 case -NFS4ERR_STALE_STATEID:
4549 nfs4_schedule_lease_recovery(server->nfs_client);
4551 case -NFS4ERR_BADSESSION:
4552 case -NFS4ERR_BADSLOT:
4553 case -NFS4ERR_BAD_HIGH_SLOT:
4554 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4555 case -NFS4ERR_DEADSESSION:
4556 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4560 * The show must go on: exit, but mark the
4561 * stateid as needing recovery.
4563 case -NFS4ERR_ADMIN_REVOKED:
4564 case -NFS4ERR_BAD_STATEID:
4565 case -NFS4ERR_OPENMODE:
4566 nfs4_schedule_stateid_recovery(server, state);
4571 * User RPCSEC_GSS context has expired.
4572 * We cannot recover this stateid now, so
4573 * skip it and allow recovery thread to
4579 case -NFS4ERR_DENIED:
4580 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4583 case -NFS4ERR_DELAY:
4586 err = nfs4_handle_exception(server, err, &exception);
4587 } while (exception.retry);
4592 static void nfs4_release_lockowner_release(void *calldata)
4597 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4598 .rpc_release = nfs4_release_lockowner_release,
4601 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4603 struct nfs_server *server = lsp->ls_state->owner->so_server;
4604 struct nfs_release_lockowner_args *args;
4605 struct rpc_message msg = {
4606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4609 if (server->nfs_client->cl_mvops->minor_version != 0)
4611 args = kmalloc(sizeof(*args), GFP_NOFS);
4614 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4615 args->lock_owner.id = lsp->ls_id.id;
4616 args->lock_owner.s_dev = server->s_dev;
4617 msg.rpc_argp = args;
4618 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4621 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4623 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4624 const void *buf, size_t buflen,
4625 int flags, int type)
4627 if (strcmp(key, "") != 0)
4630 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4633 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4634 void *buf, size_t buflen, int type)
4636 if (strcmp(key, "") != 0)
4639 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4642 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4643 size_t list_len, const char *name,
4644 size_t name_len, int type)
4646 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4648 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4651 if (list && len <= list_len)
4652 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4656 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4658 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4659 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4660 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4663 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4664 NFS_ATTR_FATTR_NLINK;
4665 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4669 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4670 struct nfs4_fs_locations *fs_locations, struct page *page)
4672 struct nfs_server *server = NFS_SERVER(dir);
4674 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4675 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4677 struct nfs4_fs_locations_arg args = {
4678 .dir_fh = NFS_FH(dir),
4683 struct nfs4_fs_locations_res res = {
4684 .fs_locations = fs_locations,
4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4693 dprintk("%s: start\n", __func__);
4694 nfs_fattr_init(&fs_locations->fattr);
4695 fs_locations->server = server;
4696 fs_locations->nlocations = 0;
4697 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4698 nfs_fixup_referral_attributes(&fs_locations->fattr);
4699 dprintk("%s: returned status = %d\n", __func__, status);
4703 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4706 struct nfs4_secinfo_arg args = {
4707 .dir_fh = NFS_FH(dir),
4710 struct nfs4_secinfo_res res = {
4713 struct rpc_message msg = {
4714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4719 dprintk("NFS call secinfo %s\n", name->name);
4720 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4721 dprintk("NFS reply secinfo: %d\n", status);
4725 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4727 struct nfs4_exception exception = { };
4730 err = nfs4_handle_exception(NFS_SERVER(dir),
4731 _nfs4_proc_secinfo(dir, name, flavors),
4733 } while (exception.retry);
4737 #ifdef CONFIG_NFS_V4_1
4739 * Check the exchange flags returned by the server for invalid flags, having
4740 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4743 static int nfs4_check_cl_exchange_flags(u32 flags)
4745 if (flags & ~EXCHGID4_FLAG_MASK_R)
4747 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4748 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4750 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4754 return -NFS4ERR_INVAL;
4758 * nfs4_proc_exchange_id()
4760 * Since the clientid has expired, all compounds using sessions
4761 * associated with the stale clientid will be returning
4762 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4763 * be in some phase of session reset.
4765 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4767 nfs4_verifier verifier;
4768 struct nfs41_exchange_id_args args = {
4770 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4772 struct nfs41_exchange_id_res res = {
4776 struct rpc_message msg = {
4777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4784 dprintk("--> %s\n", __func__);
4785 BUG_ON(clp == NULL);
4787 p = (u32 *)verifier.data;
4788 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4789 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4790 args.verifier = &verifier;
4792 args.id_len = scnprintf(args.id, sizeof(args.id),
4795 init_utsname()->nodename,
4796 init_utsname()->domainname,
4797 clp->cl_rpcclient->cl_auth->au_flavor);
4799 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4801 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4802 dprintk("<-- %s status= %d\n", __func__, status);
4806 struct nfs4_get_lease_time_data {
4807 struct nfs4_get_lease_time_args *args;
4808 struct nfs4_get_lease_time_res *res;
4809 struct nfs_client *clp;
4812 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4816 struct nfs4_get_lease_time_data *data =
4817 (struct nfs4_get_lease_time_data *)calldata;
4819 dprintk("--> %s\n", __func__);
4820 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4821 /* just setup sequence, do not trigger session recovery
4822 since we're invoked within one */
4823 ret = nfs41_setup_sequence(data->clp->cl_session,
4824 &data->args->la_seq_args,
4825 &data->res->lr_seq_res, 0, task);
4827 BUG_ON(ret == -EAGAIN);
4828 rpc_call_start(task);
4829 dprintk("<-- %s\n", __func__);
4833 * Called from nfs4_state_manager thread for session setup, so don't recover
4834 * from sequence operation or clientid errors.
4836 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4838 struct nfs4_get_lease_time_data *data =
4839 (struct nfs4_get_lease_time_data *)calldata;
4841 dprintk("--> %s\n", __func__);
4842 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4844 switch (task->tk_status) {
4845 case -NFS4ERR_DELAY:
4846 case -NFS4ERR_GRACE:
4847 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4848 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4849 task->tk_status = 0;
4850 nfs_restart_rpc(task, data->clp);
4853 dprintk("<-- %s\n", __func__);
4856 struct rpc_call_ops nfs4_get_lease_time_ops = {
4857 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4858 .rpc_call_done = nfs4_get_lease_time_done,
4861 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4863 struct rpc_task *task;
4864 struct nfs4_get_lease_time_args args;
4865 struct nfs4_get_lease_time_res res = {
4866 .lr_fsinfo = fsinfo,
4868 struct nfs4_get_lease_time_data data = {
4873 struct rpc_message msg = {
4874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4878 struct rpc_task_setup task_setup = {
4879 .rpc_client = clp->cl_rpcclient,
4880 .rpc_message = &msg,
4881 .callback_ops = &nfs4_get_lease_time_ops,
4882 .callback_data = &data
4886 dprintk("--> %s\n", __func__);
4887 task = rpc_run_task(&task_setup);
4890 status = PTR_ERR(task);
4892 status = task->tk_status;
4895 dprintk("<-- %s return %d\n", __func__, status);
4901 * Reset a slot table
4903 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4906 struct nfs4_slot *new = NULL;
4910 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4911 max_reqs, tbl->max_slots);
4913 /* Does the newly negotiated max_reqs match the existing slot table? */
4914 if (max_reqs != tbl->max_slots) {
4916 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4923 spin_lock(&tbl->slot_tbl_lock);
4926 tbl->max_slots = max_reqs;
4928 for (i = 0; i < tbl->max_slots; ++i)
4929 tbl->slots[i].seq_nr = ivalue;
4930 spin_unlock(&tbl->slot_tbl_lock);
4931 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4932 tbl, tbl->slots, tbl->max_slots);
4934 dprintk("<-- %s: return %d\n", __func__, ret);
4939 * Reset the forechannel and backchannel slot tables
4941 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4945 status = nfs4_reset_slot_table(&session->fc_slot_table,
4946 session->fc_attrs.max_reqs, 1);
4950 status = nfs4_reset_slot_table(&session->bc_slot_table,
4951 session->bc_attrs.max_reqs, 0);
4955 /* Destroy the slot table */
4956 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4958 if (session->fc_slot_table.slots != NULL) {
4959 kfree(session->fc_slot_table.slots);
4960 session->fc_slot_table.slots = NULL;
4962 if (session->bc_slot_table.slots != NULL) {
4963 kfree(session->bc_slot_table.slots);
4964 session->bc_slot_table.slots = NULL;
4970 * Initialize slot table
4972 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4973 int max_slots, int ivalue)
4975 struct nfs4_slot *slot;
4978 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4980 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4982 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4987 spin_lock(&tbl->slot_tbl_lock);
4988 tbl->max_slots = max_slots;
4990 tbl->highest_used_slotid = -1; /* no slot is currently used */
4991 spin_unlock(&tbl->slot_tbl_lock);
4992 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4993 tbl, tbl->slots, tbl->max_slots);
4995 dprintk("<-- %s: return %d\n", __func__, ret);
5000 * Initialize the forechannel and backchannel tables
5002 static int nfs4_init_slot_tables(struct nfs4_session *session)
5004 struct nfs4_slot_table *tbl;
5007 tbl = &session->fc_slot_table;
5008 if (tbl->slots == NULL) {
5009 status = nfs4_init_slot_table(tbl,
5010 session->fc_attrs.max_reqs, 1);
5015 tbl = &session->bc_slot_table;
5016 if (tbl->slots == NULL) {
5017 status = nfs4_init_slot_table(tbl,
5018 session->bc_attrs.max_reqs, 0);
5020 nfs4_destroy_slot_tables(session);
5026 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5028 struct nfs4_session *session;
5029 struct nfs4_slot_table *tbl;
5031 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5035 tbl = &session->fc_slot_table;
5036 tbl->highest_used_slotid = -1;
5037 spin_lock_init(&tbl->slot_tbl_lock);
5038 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5039 init_completion(&tbl->complete);
5041 tbl = &session->bc_slot_table;
5042 tbl->highest_used_slotid = -1;
5043 spin_lock_init(&tbl->slot_tbl_lock);
5044 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5045 init_completion(&tbl->complete);
5047 session->session_state = 1<<NFS4_SESSION_INITING;
5053 void nfs4_destroy_session(struct nfs4_session *session)
5055 nfs4_proc_destroy_session(session);
5056 dprintk("%s Destroy backchannel for xprt %p\n",
5057 __func__, session->clp->cl_rpcclient->cl_xprt);
5058 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5059 NFS41_BC_MIN_CALLBACKS);
5060 nfs4_destroy_slot_tables(session);
5065 * Initialize the values to be used by the client in CREATE_SESSION
5066 * If nfs4_init_session set the fore channel request and response sizes,
5069 * Set the back channel max_resp_sz_cached to zero to force the client to
5070 * always set csa_cachethis to FALSE because the current implementation
5071 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5073 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5075 struct nfs4_session *session = args->client->cl_session;
5076 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5077 mxresp_sz = session->fc_attrs.max_resp_sz;
5080 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5082 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5083 /* Fore channel attributes */
5084 args->fc_attrs.headerpadsz = 0;
5085 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5086 args->fc_attrs.max_resp_sz = mxresp_sz;
5087 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5088 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5090 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5091 "max_ops=%u max_reqs=%u\n",
5093 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5094 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5096 /* Back channel attributes */
5097 args->bc_attrs.headerpadsz = 0;
5098 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5099 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5100 args->bc_attrs.max_resp_sz_cached = 0;
5101 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5102 args->bc_attrs.max_reqs = 1;
5104 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5105 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5107 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5108 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5109 args->bc_attrs.max_reqs);
5112 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5114 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5115 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5117 if (rcvd->headerpadsz > sent->headerpadsz)
5119 if (rcvd->max_resp_sz > sent->max_resp_sz)
5122 * Our requested max_ops is the minimum we need; we're not
5123 * prepared to break up compounds into smaller pieces than that.
5124 * So, no point even trying to continue if the server won't
5127 if (rcvd->max_ops < sent->max_ops)
5129 if (rcvd->max_reqs == 0)
5134 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5136 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5137 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5139 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5141 if (rcvd->max_resp_sz < sent->max_resp_sz)
5143 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5145 /* These would render the backchannel useless: */
5146 if (rcvd->max_ops == 0)
5148 if (rcvd->max_reqs == 0)
5153 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5154 struct nfs4_session *session)
5158 ret = nfs4_verify_fore_channel_attrs(args, session);
5161 return nfs4_verify_back_channel_attrs(args, session);
5164 static int _nfs4_proc_create_session(struct nfs_client *clp)
5166 struct nfs4_session *session = clp->cl_session;
5167 struct nfs41_create_session_args args = {
5169 .cb_program = NFS4_CALLBACK,
5171 struct nfs41_create_session_res res = {
5174 struct rpc_message msg = {
5175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5181 nfs4_init_channel_attrs(&args);
5182 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5184 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5187 /* Verify the session's negotiated channel_attrs values */
5188 status = nfs4_verify_channel_attrs(&args, session);
5190 /* Increment the clientid slot sequence id */
5198 * Issues a CREATE_SESSION operation to the server.
5199 * It is the responsibility of the caller to verify the session is
5200 * expired before calling this routine.
5202 int nfs4_proc_create_session(struct nfs_client *clp)
5206 struct nfs4_session *session = clp->cl_session;
5210 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5213 status = _nfs4_proc_create_session(clp);
5214 if (status == -NFS4ERR_DELAY) {
5215 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5219 } while (status == -NFS4ERR_DELAY);
5224 /* Init and reset the fore channel */
5225 status = nfs4_init_slot_tables(session);
5226 dprintk("slot table initialization returned %d\n", status);
5229 status = nfs4_reset_slot_tables(session);
5230 dprintk("slot table reset returned %d\n", status);
5234 ptr = (unsigned *)&session->sess_id.data[0];
5235 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5236 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5238 dprintk("<-- %s\n", __func__);
5243 * Issue the over-the-wire RPC DESTROY_SESSION.
5244 * The caller must serialize access to this routine.
5246 int nfs4_proc_destroy_session(struct nfs4_session *session)
5249 struct rpc_message msg;
5251 dprintk("--> nfs4_proc_destroy_session\n");
5253 /* session is still being setup */
5254 if (session->clp->cl_cons_state != NFS_CS_READY)
5257 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5258 msg.rpc_argp = session;
5259 msg.rpc_resp = NULL;
5260 msg.rpc_cred = NULL;
5261 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5265 "Got error %d from the server on DESTROY_SESSION. "
5266 "Session has been destroyed regardless...\n", status);
5268 dprintk("<-- nfs4_proc_destroy_session\n");
5272 int nfs4_init_session(struct nfs_server *server)
5274 struct nfs_client *clp = server->nfs_client;
5275 struct nfs4_session *session;
5276 unsigned int rsize, wsize;
5279 if (!nfs4_has_session(clp))
5282 session = clp->cl_session;
5283 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5286 rsize = server->rsize;
5288 rsize = NFS_MAX_FILE_IO_SIZE;
5289 wsize = server->wsize;
5291 wsize = NFS_MAX_FILE_IO_SIZE;
5293 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5294 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5296 ret = nfs4_recover_expired_lease(server);
5298 ret = nfs4_check_client_ready(clp);
5302 int nfs4_init_ds_session(struct nfs_client *clp)
5304 struct nfs4_session *session = clp->cl_session;
5307 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5310 ret = nfs4_client_recover_expired_lease(clp);
5312 /* Test for the DS role */
5313 if (!is_ds_client(clp))
5316 ret = nfs4_check_client_ready(clp);
5320 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5324 * Renew the cl_session lease.
5326 struct nfs4_sequence_data {
5327 struct nfs_client *clp;
5328 struct nfs4_sequence_args args;
5329 struct nfs4_sequence_res res;
5332 static void nfs41_sequence_release(void *data)
5334 struct nfs4_sequence_data *calldata = data;
5335 struct nfs_client *clp = calldata->clp;
5337 if (atomic_read(&clp->cl_count) > 1)
5338 nfs4_schedule_state_renewal(clp);
5339 nfs_put_client(clp);
5343 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5345 switch(task->tk_status) {
5346 case -NFS4ERR_DELAY:
5347 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5350 nfs4_schedule_lease_recovery(clp);
5355 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5357 struct nfs4_sequence_data *calldata = data;
5358 struct nfs_client *clp = calldata->clp;
5360 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5363 if (task->tk_status < 0) {
5364 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5365 if (atomic_read(&clp->cl_count) == 1)
5368 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5369 rpc_restart_call_prepare(task);
5373 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5375 dprintk("<-- %s\n", __func__);
5378 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5380 struct nfs4_sequence_data *calldata = data;
5381 struct nfs_client *clp = calldata->clp;
5382 struct nfs4_sequence_args *args;
5383 struct nfs4_sequence_res *res;
5385 args = task->tk_msg.rpc_argp;
5386 res = task->tk_msg.rpc_resp;
5388 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5390 rpc_call_start(task);
5393 static const struct rpc_call_ops nfs41_sequence_ops = {
5394 .rpc_call_done = nfs41_sequence_call_done,
5395 .rpc_call_prepare = nfs41_sequence_prepare,
5396 .rpc_release = nfs41_sequence_release,
5399 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5401 struct nfs4_sequence_data *calldata;
5402 struct rpc_message msg = {
5403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5406 struct rpc_task_setup task_setup_data = {
5407 .rpc_client = clp->cl_rpcclient,
5408 .rpc_message = &msg,
5409 .callback_ops = &nfs41_sequence_ops,
5410 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5413 if (!atomic_inc_not_zero(&clp->cl_count))
5414 return ERR_PTR(-EIO);
5415 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5416 if (calldata == NULL) {
5417 nfs_put_client(clp);
5418 return ERR_PTR(-ENOMEM);
5420 msg.rpc_argp = &calldata->args;
5421 msg.rpc_resp = &calldata->res;
5422 calldata->clp = clp;
5423 task_setup_data.callback_data = calldata;
5425 return rpc_run_task(&task_setup_data);
5428 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5430 struct rpc_task *task;
5433 task = _nfs41_proc_sequence(clp, cred);
5435 ret = PTR_ERR(task);
5437 rpc_put_task_async(task);
5438 dprintk("<-- %s status=%d\n", __func__, ret);
5442 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5444 struct rpc_task *task;
5447 task = _nfs41_proc_sequence(clp, cred);
5449 ret = PTR_ERR(task);
5452 ret = rpc_wait_for_completion_task(task);
5454 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5456 if (task->tk_status == 0)
5457 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5458 ret = task->tk_status;
5462 dprintk("<-- %s status=%d\n", __func__, ret);
5466 struct nfs4_reclaim_complete_data {
5467 struct nfs_client *clp;
5468 struct nfs41_reclaim_complete_args arg;
5469 struct nfs41_reclaim_complete_res res;
5472 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5474 struct nfs4_reclaim_complete_data *calldata = data;
5476 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5477 if (nfs41_setup_sequence(calldata->clp->cl_session,
5478 &calldata->arg.seq_args,
5479 &calldata->res.seq_res, 0, task))
5482 rpc_call_start(task);
5485 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5487 switch(task->tk_status) {
5489 case -NFS4ERR_COMPLETE_ALREADY:
5490 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5492 case -NFS4ERR_DELAY:
5493 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5496 nfs4_schedule_lease_recovery(clp);
5501 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5503 struct nfs4_reclaim_complete_data *calldata = data;
5504 struct nfs_client *clp = calldata->clp;
5505 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5507 dprintk("--> %s\n", __func__);
5508 if (!nfs41_sequence_done(task, res))
5511 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5512 rpc_restart_call_prepare(task);
5515 dprintk("<-- %s\n", __func__);
5518 static void nfs4_free_reclaim_complete_data(void *data)
5520 struct nfs4_reclaim_complete_data *calldata = data;
5525 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5526 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5527 .rpc_call_done = nfs4_reclaim_complete_done,
5528 .rpc_release = nfs4_free_reclaim_complete_data,
5532 * Issue a global reclaim complete.
5534 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5536 struct nfs4_reclaim_complete_data *calldata;
5537 struct rpc_task *task;
5538 struct rpc_message msg = {
5539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5541 struct rpc_task_setup task_setup_data = {
5542 .rpc_client = clp->cl_rpcclient,
5543 .rpc_message = &msg,
5544 .callback_ops = &nfs4_reclaim_complete_call_ops,
5545 .flags = RPC_TASK_ASYNC,
5547 int status = -ENOMEM;
5549 dprintk("--> %s\n", __func__);
5550 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5551 if (calldata == NULL)
5553 calldata->clp = clp;
5554 calldata->arg.one_fs = 0;
5556 msg.rpc_argp = &calldata->arg;
5557 msg.rpc_resp = &calldata->res;
5558 task_setup_data.callback_data = calldata;
5559 task = rpc_run_task(&task_setup_data);
5561 status = PTR_ERR(task);
5564 status = nfs4_wait_for_completion_rpc_task(task);
5566 status = task->tk_status;
5570 dprintk("<-- %s status=%d\n", __func__, status);
5575 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5577 struct nfs4_layoutget *lgp = calldata;
5578 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5580 dprintk("--> %s\n", __func__);
5581 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5582 * right now covering the LAYOUTGET we are about to send.
5583 * However, that is not so catastrophic, and there seems
5584 * to be no way to prevent it completely.
5586 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5587 &lgp->res.seq_res, 0, task))
5589 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5590 NFS_I(lgp->args.inode)->layout,
5591 lgp->args.ctx->state)) {
5592 rpc_exit(task, NFS4_OK);
5595 rpc_call_start(task);
5598 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5600 struct nfs4_layoutget *lgp = calldata;
5601 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5603 dprintk("--> %s\n", __func__);
5605 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5608 switch (task->tk_status) {
5611 case -NFS4ERR_LAYOUTTRYLATER:
5612 case -NFS4ERR_RECALLCONFLICT:
5613 task->tk_status = -NFS4ERR_DELAY;
5616 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5617 rpc_restart_call_prepare(task);
5621 dprintk("<-- %s\n", __func__);
5624 static void nfs4_layoutget_release(void *calldata)
5626 struct nfs4_layoutget *lgp = calldata;
5628 dprintk("--> %s\n", __func__);
5629 put_nfs_open_context(lgp->args.ctx);
5631 dprintk("<-- %s\n", __func__);
5634 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5635 .rpc_call_prepare = nfs4_layoutget_prepare,
5636 .rpc_call_done = nfs4_layoutget_done,
5637 .rpc_release = nfs4_layoutget_release,
5640 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5642 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5643 struct rpc_task *task;
5644 struct rpc_message msg = {
5645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5646 .rpc_argp = &lgp->args,
5647 .rpc_resp = &lgp->res,
5649 struct rpc_task_setup task_setup_data = {
5650 .rpc_client = server->client,
5651 .rpc_message = &msg,
5652 .callback_ops = &nfs4_layoutget_call_ops,
5653 .callback_data = lgp,
5654 .flags = RPC_TASK_ASYNC,
5658 dprintk("--> %s\n", __func__);
5660 lgp->res.layoutp = &lgp->args.layout;
5661 lgp->res.seq_res.sr_slot = NULL;
5662 task = rpc_run_task(&task_setup_data);
5664 return PTR_ERR(task);
5665 status = nfs4_wait_for_completion_rpc_task(task);
5667 status = task->tk_status;
5669 status = pnfs_layout_process(lgp);
5671 dprintk("<-- %s status=%d\n", __func__, status);
5676 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5678 struct nfs4_getdeviceinfo_args args = {
5681 struct nfs4_getdeviceinfo_res res = {
5684 struct rpc_message msg = {
5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5691 dprintk("--> %s\n", __func__);
5692 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5693 dprintk("<-- %s status=%d\n", __func__, status);
5698 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5700 struct nfs4_exception exception = { };
5704 err = nfs4_handle_exception(server,
5705 _nfs4_proc_getdeviceinfo(server, pdev),
5707 } while (exception.retry);
5710 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5712 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5714 struct nfs4_layoutcommit_data *data = calldata;
5715 struct nfs_server *server = NFS_SERVER(data->args.inode);
5717 if (nfs4_setup_sequence(server, &data->args.seq_args,
5718 &data->res.seq_res, 1, task))
5720 rpc_call_start(task);
5724 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5726 struct nfs4_layoutcommit_data *data = calldata;
5727 struct nfs_server *server = NFS_SERVER(data->args.inode);
5729 if (!nfs4_sequence_done(task, &data->res.seq_res))
5732 switch (task->tk_status) { /* Just ignore these failures */
5733 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5734 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5735 case NFS4ERR_BADLAYOUT: /* no layout */
5736 case NFS4ERR_GRACE: /* loca_recalim always false */
5737 task->tk_status = 0;
5740 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5741 nfs_restart_rpc(task, server->nfs_client);
5745 if (task->tk_status == 0)
5746 nfs_post_op_update_inode_force_wcc(data->args.inode,
5750 static void nfs4_layoutcommit_release(void *calldata)
5752 struct nfs4_layoutcommit_data *data = calldata;
5754 /* Matched by references in pnfs_set_layoutcommit */
5755 put_lseg(data->lseg);
5756 put_rpccred(data->cred);
5760 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5761 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5762 .rpc_call_done = nfs4_layoutcommit_done,
5763 .rpc_release = nfs4_layoutcommit_release,
5767 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
5769 struct rpc_message msg = {
5770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5771 .rpc_argp = &data->args,
5772 .rpc_resp = &data->res,
5773 .rpc_cred = data->cred,
5775 struct rpc_task_setup task_setup_data = {
5776 .task = &data->task,
5777 .rpc_client = NFS_CLIENT(data->args.inode),
5778 .rpc_message = &msg,
5779 .callback_ops = &nfs4_layoutcommit_ops,
5780 .callback_data = data,
5781 .flags = RPC_TASK_ASYNC,
5783 struct rpc_task *task;
5786 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5787 "lbw: %llu inode %lu\n",
5788 data->task.tk_pid, sync,
5789 data->args.lastbytewritten,
5790 data->args.inode->i_ino);
5792 task = rpc_run_task(&task_setup_data);
5794 return PTR_ERR(task);
5797 status = nfs4_wait_for_completion_rpc_task(task);
5800 status = task->tk_status;
5802 dprintk("%s: status %d\n", __func__, status);
5806 #endif /* CONFIG_NFS_V4_1 */
5808 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5809 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5810 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5811 .recover_open = nfs4_open_reclaim,
5812 .recover_lock = nfs4_lock_reclaim,
5813 .establish_clid = nfs4_init_clientid,
5814 .get_clid_cred = nfs4_get_setclientid_cred,
5817 #if defined(CONFIG_NFS_V4_1)
5818 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5819 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5820 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5821 .recover_open = nfs4_open_reclaim,
5822 .recover_lock = nfs4_lock_reclaim,
5823 .establish_clid = nfs41_init_clientid,
5824 .get_clid_cred = nfs4_get_exchange_id_cred,
5825 .reclaim_complete = nfs41_proc_reclaim_complete,
5827 #endif /* CONFIG_NFS_V4_1 */
5829 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5830 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5831 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5832 .recover_open = nfs4_open_expired,
5833 .recover_lock = nfs4_lock_expired,
5834 .establish_clid = nfs4_init_clientid,
5835 .get_clid_cred = nfs4_get_setclientid_cred,
5838 #if defined(CONFIG_NFS_V4_1)
5839 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5840 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5841 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5842 .recover_open = nfs4_open_expired,
5843 .recover_lock = nfs4_lock_expired,
5844 .establish_clid = nfs41_init_clientid,
5845 .get_clid_cred = nfs4_get_exchange_id_cred,
5847 #endif /* CONFIG_NFS_V4_1 */
5849 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5850 .sched_state_renewal = nfs4_proc_async_renew,
5851 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5852 .renew_lease = nfs4_proc_renew,
5855 #if defined(CONFIG_NFS_V4_1)
5856 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5857 .sched_state_renewal = nfs41_proc_async_sequence,
5858 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5859 .renew_lease = nfs4_proc_sequence,
5863 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5865 .call_sync = _nfs4_call_sync,
5866 .validate_stateid = nfs4_validate_delegation_stateid,
5867 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5868 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5869 .state_renewal_ops = &nfs40_state_renewal_ops,
5872 #if defined(CONFIG_NFS_V4_1)
5873 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5875 .call_sync = _nfs4_call_sync_session,
5876 .validate_stateid = nfs41_validate_delegation_stateid,
5877 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5878 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5879 .state_renewal_ops = &nfs41_state_renewal_ops,
5883 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5884 [0] = &nfs_v4_0_minor_ops,
5885 #if defined(CONFIG_NFS_V4_1)
5886 [1] = &nfs_v4_1_minor_ops,
5890 static const struct inode_operations nfs4_file_inode_operations = {
5891 .permission = nfs_permission,
5892 .getattr = nfs_getattr,
5893 .setattr = nfs_setattr,
5894 .getxattr = generic_getxattr,
5895 .setxattr = generic_setxattr,
5896 .listxattr = generic_listxattr,
5897 .removexattr = generic_removexattr,
5900 const struct nfs_rpc_ops nfs_v4_clientops = {
5901 .version = 4, /* protocol version */
5902 .dentry_ops = &nfs4_dentry_operations,
5903 .dir_inode_ops = &nfs4_dir_inode_operations,
5904 .file_inode_ops = &nfs4_file_inode_operations,
5905 .getroot = nfs4_proc_get_root,
5906 .getattr = nfs4_proc_getattr,
5907 .setattr = nfs4_proc_setattr,
5908 .lookupfh = nfs4_proc_lookupfh,
5909 .lookup = nfs4_proc_lookup,
5910 .access = nfs4_proc_access,
5911 .readlink = nfs4_proc_readlink,
5912 .create = nfs4_proc_create,
5913 .remove = nfs4_proc_remove,
5914 .unlink_setup = nfs4_proc_unlink_setup,
5915 .unlink_done = nfs4_proc_unlink_done,
5916 .rename = nfs4_proc_rename,
5917 .rename_setup = nfs4_proc_rename_setup,
5918 .rename_done = nfs4_proc_rename_done,
5919 .link = nfs4_proc_link,
5920 .symlink = nfs4_proc_symlink,
5921 .mkdir = nfs4_proc_mkdir,
5922 .rmdir = nfs4_proc_remove,
5923 .readdir = nfs4_proc_readdir,
5924 .mknod = nfs4_proc_mknod,
5925 .statfs = nfs4_proc_statfs,
5926 .fsinfo = nfs4_proc_fsinfo,
5927 .pathconf = nfs4_proc_pathconf,
5928 .set_capabilities = nfs4_server_capabilities,
5929 .decode_dirent = nfs4_decode_dirent,
5930 .read_setup = nfs4_proc_read_setup,
5931 .read_done = nfs4_read_done,
5932 .write_setup = nfs4_proc_write_setup,
5933 .write_done = nfs4_write_done,
5934 .commit_setup = nfs4_proc_commit_setup,
5935 .commit_done = nfs4_commit_done,
5936 .lock = nfs4_proc_lock,
5937 .clear_acl_cache = nfs4_zap_acl_attr,
5938 .close_context = nfs4_close_context,
5939 .open_context = nfs4_atomic_open,
5940 .init_client = nfs4_init_client,
5941 .secinfo = nfs4_proc_secinfo,
5944 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5945 .prefix = XATTR_NAME_NFSV4_ACL,
5946 .list = nfs4_xattr_list_nfs4_acl,
5947 .get = nfs4_xattr_get_nfs4_acl,
5948 .set = nfs4_xattr_set_nfs4_acl,
5951 const struct xattr_handler *nfs4_xattr_handlers[] = {
5952 &nfs4_xattr_nfs4_acl_handler,