4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
60 #include "delegation.h"
66 #define NFSDBG_FACILITY NFSDBG_PROC
68 #define NFS4_POLL_RETRY_MIN (HZ/10)
69 #define NFS4_POLL_RETRY_MAX (15*HZ)
71 #define NFS4_MAX_LOOP_ON_RECOVER (10)
74 static int _nfs4_proc_open(struct nfs4_opendata *data);
75 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
76 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
77 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
78 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
79 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
80 struct nfs_fattr *fattr, struct iattr *sattr,
81 struct nfs4_state *state);
82 #ifdef CONFIG_NFS_V4_1
83 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
84 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
86 /* Prevent leaks of NFSv4 errors into userland */
87 static int nfs4_map_errors(int err)
92 case -NFS4ERR_RESOURCE:
94 case -NFS4ERR_WRONGSEC:
96 case -NFS4ERR_BADOWNER:
97 case -NFS4ERR_BADNAME:
99 case -NFS4ERR_SHARE_DENIED:
102 dprintk("%s could not handle NFSv4 error %d\n",
110 * This is our standard bitmap for GETATTR requests.
112 const u32 nfs4_fattr_bitmap[2] = {
114 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_FILEID,
119 | FATTR4_WORD1_NUMLINKS
121 | FATTR4_WORD1_OWNER_GROUP
122 | FATTR4_WORD1_RAWDEV
123 | FATTR4_WORD1_SPACE_USED
124 | FATTR4_WORD1_TIME_ACCESS
125 | FATTR4_WORD1_TIME_METADATA
126 | FATTR4_WORD1_TIME_MODIFY
129 const u32 nfs4_statfs_bitmap[2] = {
130 FATTR4_WORD0_FILES_AVAIL
131 | FATTR4_WORD0_FILES_FREE
132 | FATTR4_WORD0_FILES_TOTAL,
133 FATTR4_WORD1_SPACE_AVAIL
134 | FATTR4_WORD1_SPACE_FREE
135 | FATTR4_WORD1_SPACE_TOTAL
138 const u32 nfs4_pathconf_bitmap[2] = {
140 | FATTR4_WORD0_MAXNAME,
144 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
145 | FATTR4_WORD0_MAXREAD
146 | FATTR4_WORD0_MAXWRITE
147 | FATTR4_WORD0_LEASE_TIME,
148 FATTR4_WORD1_TIME_DELTA
149 | FATTR4_WORD1_FS_LAYOUT_TYPES,
150 FATTR4_WORD2_LAYOUT_BLKSIZE
153 const u32 nfs4_fs_locations_bitmap[2] = {
155 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID
159 | FATTR4_WORD0_FS_LOCATIONS,
161 | FATTR4_WORD1_NUMLINKS
163 | FATTR4_WORD1_OWNER_GROUP
164 | FATTR4_WORD1_RAWDEV
165 | FATTR4_WORD1_SPACE_USED
166 | FATTR4_WORD1_TIME_ACCESS
167 | FATTR4_WORD1_TIME_METADATA
168 | FATTR4_WORD1_TIME_MODIFY
169 | FATTR4_WORD1_MOUNTED_ON_FILEID
172 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
173 struct nfs4_readdir_arg *readdir)
177 BUG_ON(readdir->count < 80);
179 readdir->cookie = cookie;
180 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
185 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
190 * NFSv4 servers do not return entries for '.' and '..'
191 * Therefore, we fake these entries here. We let '.'
192 * have cookie 0 and '..' have cookie 1. Note that
193 * when talking to the server, we always send cookie 0
196 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199 *p++ = xdr_one; /* next */
200 *p++ = xdr_zero; /* cookie, first word */
201 *p++ = xdr_one; /* cookie, second word */
202 *p++ = xdr_one; /* entry len */
203 memcpy(p, ".\0\0\0", 4); /* entry */
205 *p++ = xdr_one; /* bitmap length */
206 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
207 *p++ = htonl(8); /* attribute buffer length */
208 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 *p++ = xdr_one; /* next */
212 *p++ = xdr_zero; /* cookie, first word */
213 *p++ = xdr_two; /* cookie, second word */
214 *p++ = xdr_two; /* entry len */
215 memcpy(p, "..\0\0", 4); /* entry */
217 *p++ = xdr_one; /* bitmap length */
218 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
219 *p++ = htonl(8); /* attribute buffer length */
220 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
222 readdir->pgbase = (char *)p - (char *)start;
223 readdir->count -= readdir->pgbase;
224 kunmap_atomic(start, KM_USER0);
227 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
233 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
234 nfs_wait_bit_killable, TASK_KILLABLE);
238 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
245 *timeout = NFS4_POLL_RETRY_MIN;
246 if (*timeout > NFS4_POLL_RETRY_MAX)
247 *timeout = NFS4_POLL_RETRY_MAX;
248 schedule_timeout_killable(*timeout);
249 if (fatal_signal_pending(current))
255 /* This is the error handling routine for processes that are allowed
258 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
260 struct nfs_client *clp = server->nfs_client;
261 struct nfs4_state *state = exception->state;
262 struct inode *inode = exception->inode;
265 exception->retry = 0;
269 case -NFS4ERR_OPENMODE:
270 if (nfs_have_delegation(inode, FMODE_READ)) {
271 nfs_inode_return_delegation(inode);
272 exception->retry = 1;
277 nfs4_schedule_stateid_recovery(server, state);
278 goto wait_on_recovery;
279 case -NFS4ERR_DELEG_REVOKED:
280 case -NFS4ERR_ADMIN_REVOKED:
281 case -NFS4ERR_BAD_STATEID:
283 nfs_remove_bad_delegation(state->inode);
286 nfs4_schedule_stateid_recovery(server, state);
287 goto wait_on_recovery;
288 case -NFS4ERR_EXPIRED:
290 nfs4_schedule_stateid_recovery(server, state);
291 case -NFS4ERR_STALE_STATEID:
292 case -NFS4ERR_STALE_CLIENTID:
293 nfs4_schedule_lease_recovery(clp);
294 goto wait_on_recovery;
295 #if defined(CONFIG_NFS_V4_1)
296 case -NFS4ERR_BADSESSION:
297 case -NFS4ERR_BADSLOT:
298 case -NFS4ERR_BAD_HIGH_SLOT:
299 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
300 case -NFS4ERR_DEADSESSION:
301 case -NFS4ERR_SEQ_FALSE_RETRY:
302 case -NFS4ERR_SEQ_MISORDERED:
303 dprintk("%s ERROR: %d Reset session\n", __func__,
305 nfs4_schedule_session_recovery(clp->cl_session);
306 exception->retry = 1;
308 #endif /* defined(CONFIG_NFS_V4_1) */
309 case -NFS4ERR_FILE_OPEN:
310 if (exception->timeout > HZ) {
311 /* We have retried a decent amount, time to
320 ret = nfs4_delay(server->client, &exception->timeout);
323 case -NFS4ERR_RETRY_UNCACHED_REP:
324 case -NFS4ERR_OLD_STATEID:
325 exception->retry = 1;
327 case -NFS4ERR_BADOWNER:
328 /* The following works around a Linux server bug! */
329 case -NFS4ERR_BADNAME:
330 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
331 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
332 exception->retry = 1;
333 printk(KERN_WARNING "NFS: v4 server %s "
334 "does not accept raw "
336 "Reenabling the idmapper.\n",
337 server->nfs_client->cl_hostname);
340 /* We failed to handle the error */
341 return nfs4_map_errors(ret);
343 ret = nfs4_wait_clnt_recover(clp);
345 exception->retry = 1;
350 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
352 spin_lock(&clp->cl_lock);
353 if (time_before(clp->cl_last_renewal,timestamp))
354 clp->cl_last_renewal = timestamp;
355 spin_unlock(&clp->cl_lock);
358 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
360 do_renew_lease(server->nfs_client, timestamp);
363 #if defined(CONFIG_NFS_V4_1)
366 * nfs4_free_slot - free a slot and efficiently update slot table.
368 * freeing a slot is trivially done by clearing its respective bit
370 * If the freed slotid equals highest_used_slotid we want to update it
371 * so that the server would be able to size down the slot table if needed,
372 * otherwise we know that the highest_used_slotid is still in use.
373 * When updating highest_used_slotid there may be "holes" in the bitmap
374 * so we need to scan down from highest_used_slotid to 0 looking for the now
375 * highest slotid in use.
376 * If none found, highest_used_slotid is set to -1.
378 * Must be called while holding tbl->slot_tbl_lock
381 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
383 int free_slotid = free_slot - tbl->slots;
384 int slotid = free_slotid;
386 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
387 /* clear used bit in bitmap */
388 __clear_bit(slotid, tbl->used_slots);
390 /* update highest_used_slotid when it is freed */
391 if (slotid == tbl->highest_used_slotid) {
392 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
393 if (slotid < tbl->max_slots)
394 tbl->highest_used_slotid = slotid;
396 tbl->highest_used_slotid = -1;
398 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
399 free_slotid, tbl->highest_used_slotid);
403 * Signal state manager thread if session fore channel is drained
405 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
407 struct rpc_task *task;
409 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
410 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
412 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
416 if (ses->fc_slot_table.highest_used_slotid != -1)
419 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
420 complete(&ses->fc_slot_table.complete);
424 * Signal state manager thread if session back channel is drained
426 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
428 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
429 ses->bc_slot_table.highest_used_slotid != -1)
431 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
432 complete(&ses->bc_slot_table.complete);
435 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
437 struct nfs4_slot_table *tbl;
439 tbl = &res->sr_session->fc_slot_table;
441 /* just wake up the next guy waiting since
442 * we may have not consumed a slot after all */
443 dprintk("%s: No slot\n", __func__);
447 spin_lock(&tbl->slot_tbl_lock);
448 nfs4_free_slot(tbl, res->sr_slot);
449 nfs4_check_drain_fc_complete(res->sr_session);
450 spin_unlock(&tbl->slot_tbl_lock);
454 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
456 unsigned long timestamp;
457 struct nfs_client *clp;
460 * sr_status remains 1 if an RPC level error occurred. The server
461 * may or may not have processed the sequence operation..
462 * Proceed as if the server received and processed the sequence
465 if (res->sr_status == 1)
466 res->sr_status = NFS_OK;
468 /* don't increment the sequence number if the task wasn't sent */
469 if (!RPC_WAS_SENT(task))
472 /* Check the SEQUENCE operation status */
473 switch (res->sr_status) {
475 /* Update the slot's sequence and clientid lease timer */
476 ++res->sr_slot->seq_nr;
477 timestamp = res->sr_renewal_time;
478 clp = res->sr_session->clp;
479 do_renew_lease(clp, timestamp);
480 /* Check sequence flags */
481 if (res->sr_status_flags != 0)
482 nfs4_schedule_lease_recovery(clp);
485 /* The server detected a resend of the RPC call and
486 * returned NFS4ERR_DELAY as per Section 2.10.6.2
489 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
491 res->sr_slot - res->sr_session->fc_slot_table.slots,
492 res->sr_slot->seq_nr);
495 /* Just update the slot sequence no. */
496 ++res->sr_slot->seq_nr;
499 /* The session may be reset by one of the error handlers. */
500 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
501 nfs41_sequence_free_slot(res);
504 if (!rpc_restart_call(task))
506 rpc_delay(task, NFS4_POLL_RETRY_MAX);
510 static int nfs4_sequence_done(struct rpc_task *task,
511 struct nfs4_sequence_res *res)
513 if (res->sr_session == NULL)
515 return nfs41_sequence_done(task, res);
519 * nfs4_find_slot - efficiently look for a free slot
521 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
522 * If found, we mark the slot as used, update the highest_used_slotid,
523 * and respectively set up the sequence operation args.
524 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
526 * Note: must be called with under the slot_tbl_lock.
529 nfs4_find_slot(struct nfs4_slot_table *tbl)
532 u8 ret_id = NFS4_MAX_SLOT_TABLE;
533 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
535 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
536 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
538 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
539 if (slotid >= tbl->max_slots)
541 __set_bit(slotid, tbl->used_slots);
542 if (slotid > tbl->highest_used_slotid)
543 tbl->highest_used_slotid = slotid;
546 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
547 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
551 int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
555 struct rpc_task *task)
557 struct nfs4_slot *slot;
558 struct nfs4_slot_table *tbl;
561 dprintk("--> %s\n", __func__);
562 /* slot already allocated? */
563 if (res->sr_slot != NULL)
566 tbl = &session->fc_slot_table;
568 spin_lock(&tbl->slot_tbl_lock);
569 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
570 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
572 * The state manager will wait until the slot table is empty.
573 * Schedule the reset thread
575 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
576 spin_unlock(&tbl->slot_tbl_lock);
577 dprintk("%s Schedule Session Reset\n", __func__);
581 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
582 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
583 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
584 spin_unlock(&tbl->slot_tbl_lock);
585 dprintk("%s enforce FIFO order\n", __func__);
589 slotid = nfs4_find_slot(tbl);
590 if (slotid == NFS4_MAX_SLOT_TABLE) {
591 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
592 spin_unlock(&tbl->slot_tbl_lock);
593 dprintk("<-- %s: no free slots\n", __func__);
596 spin_unlock(&tbl->slot_tbl_lock);
598 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
599 slot = tbl->slots + slotid;
600 args->sa_session = session;
601 args->sa_slotid = slotid;
602 args->sa_cache_this = cache_reply;
604 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
606 res->sr_session = session;
608 res->sr_renewal_time = jiffies;
609 res->sr_status_flags = 0;
611 * sr_status is only set in decode_sequence, and so will remain
612 * set to 1 if an rpc level failure occurs.
617 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
619 int nfs4_setup_sequence(const struct nfs_server *server,
620 struct nfs4_sequence_args *args,
621 struct nfs4_sequence_res *res,
623 struct rpc_task *task)
625 struct nfs4_session *session = nfs4_get_session(server);
628 if (session == NULL) {
629 args->sa_session = NULL;
630 res->sr_session = NULL;
634 dprintk("--> %s clp %p session %p sr_slot %td\n",
635 __func__, session->clp, session, res->sr_slot ?
636 res->sr_slot - session->fc_slot_table.slots : -1);
638 ret = nfs41_setup_sequence(session, args, res, cache_reply,
641 dprintk("<-- %s status=%d\n", __func__, ret);
645 struct nfs41_call_sync_data {
646 const struct nfs_server *seq_server;
647 struct nfs4_sequence_args *seq_args;
648 struct nfs4_sequence_res *seq_res;
652 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
654 struct nfs41_call_sync_data *data = calldata;
656 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
658 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
659 data->seq_res, data->cache_reply, task))
661 rpc_call_start(task);
664 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
666 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
667 nfs41_call_sync_prepare(task, calldata);
670 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
672 struct nfs41_call_sync_data *data = calldata;
674 nfs41_sequence_done(task, data->seq_res);
677 struct rpc_call_ops nfs41_call_sync_ops = {
678 .rpc_call_prepare = nfs41_call_sync_prepare,
679 .rpc_call_done = nfs41_call_sync_done,
682 struct rpc_call_ops nfs41_call_priv_sync_ops = {
683 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
684 .rpc_call_done = nfs41_call_sync_done,
687 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
688 struct nfs_server *server,
689 struct rpc_message *msg,
690 struct nfs4_sequence_args *args,
691 struct nfs4_sequence_res *res,
696 struct rpc_task *task;
697 struct nfs41_call_sync_data data = {
698 .seq_server = server,
701 .cache_reply = cache_reply,
703 struct rpc_task_setup task_setup = {
706 .callback_ops = &nfs41_call_sync_ops,
707 .callback_data = &data
712 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
713 task = rpc_run_task(&task_setup);
717 ret = task->tk_status;
723 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
724 struct nfs_server *server,
725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res,
730 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
734 static int nfs4_sequence_done(struct rpc_task *task,
735 struct nfs4_sequence_res *res)
739 #endif /* CONFIG_NFS_V4_1 */
741 int _nfs4_call_sync(struct rpc_clnt *clnt,
742 struct nfs_server *server,
743 struct rpc_message *msg,
744 struct nfs4_sequence_args *args,
745 struct nfs4_sequence_res *res,
748 args->sa_session = res->sr_session = NULL;
749 return rpc_call_sync(clnt, msg, 0);
753 int nfs4_call_sync(struct rpc_clnt *clnt,
754 struct nfs_server *server,
755 struct rpc_message *msg,
756 struct nfs4_sequence_args *args,
757 struct nfs4_sequence_res *res,
760 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
761 args, res, cache_reply);
764 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
766 struct nfs_inode *nfsi = NFS_I(dir);
768 spin_lock(&dir->i_lock);
769 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
770 if (!cinfo->atomic || cinfo->before != dir->i_version)
771 nfs_force_lookup_revalidate(dir);
772 dir->i_version = cinfo->after;
773 spin_unlock(&dir->i_lock);
776 struct nfs4_opendata {
778 struct nfs_openargs o_arg;
779 struct nfs_openres o_res;
780 struct nfs_open_confirmargs c_arg;
781 struct nfs_open_confirmres c_res;
782 struct nfs_fattr f_attr;
783 struct nfs_fattr dir_attr;
785 struct dentry *dentry;
786 struct nfs4_state_owner *owner;
787 struct nfs4_state *state;
789 unsigned long timestamp;
790 unsigned int rpc_done : 1;
796 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
798 p->o_res.f_attr = &p->f_attr;
799 p->o_res.dir_attr = &p->dir_attr;
800 p->o_res.seqid = p->o_arg.seqid;
801 p->c_res.seqid = p->c_arg.seqid;
802 p->o_res.server = p->o_arg.server;
803 nfs_fattr_init(&p->f_attr);
804 nfs_fattr_init(&p->dir_attr);
807 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
808 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
809 const struct iattr *attrs,
812 struct dentry *parent = dget_parent(dentry);
813 struct inode *dir = parent->d_inode;
814 struct nfs_server *server = NFS_SERVER(dir);
815 struct nfs4_opendata *p;
817 p = kzalloc(sizeof(*p), gfp_mask);
820 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
821 if (p->o_arg.seqid == NULL)
823 nfs_sb_active(dentry->d_sb);
824 p->dentry = dget(dentry);
827 atomic_inc(&sp->so_count);
828 p->o_arg.fh = NFS_FH(dir);
829 p->o_arg.open_flags = flags;
830 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
831 p->o_arg.clientid = server->nfs_client->cl_clientid;
832 p->o_arg.id = sp->so_owner_id.id;
833 p->o_arg.name = &dentry->d_name;
834 p->o_arg.server = server;
835 p->o_arg.bitmask = server->attr_bitmask;
836 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
837 if (flags & O_CREAT) {
840 p->o_arg.u.attrs = &p->attrs;
841 memcpy(&p->attrs, attrs, sizeof(p->attrs));
842 s = (u32 *) p->o_arg.u.verifier.data;
846 p->c_arg.fh = &p->o_res.fh;
847 p->c_arg.stateid = &p->o_res.stateid;
848 p->c_arg.seqid = p->o_arg.seqid;
849 nfs4_init_opendata_res(p);
859 static void nfs4_opendata_free(struct kref *kref)
861 struct nfs4_opendata *p = container_of(kref,
862 struct nfs4_opendata, kref);
863 struct super_block *sb = p->dentry->d_sb;
865 nfs_free_seqid(p->o_arg.seqid);
866 if (p->state != NULL)
867 nfs4_put_open_state(p->state);
868 nfs4_put_state_owner(p->owner);
875 static void nfs4_opendata_put(struct nfs4_opendata *p)
878 kref_put(&p->kref, nfs4_opendata_free);
881 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
885 ret = rpc_wait_for_completion_task(task);
889 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
893 if (open_mode & O_EXCL)
895 switch (mode & (FMODE_READ|FMODE_WRITE)) {
897 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
898 && state->n_rdonly != 0;
901 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
902 && state->n_wronly != 0;
904 case FMODE_READ|FMODE_WRITE:
905 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
906 && state->n_rdwr != 0;
912 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
914 if (delegation == NULL)
916 if ((delegation->type & fmode) != fmode)
918 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
920 nfs_mark_delegation_referenced(delegation);
924 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
933 case FMODE_READ|FMODE_WRITE:
936 nfs4_state_set_mode_locked(state, state->state | fmode);
939 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
941 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
942 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
943 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
946 set_bit(NFS_O_RDONLY_STATE, &state->flags);
949 set_bit(NFS_O_WRONLY_STATE, &state->flags);
951 case FMODE_READ|FMODE_WRITE:
952 set_bit(NFS_O_RDWR_STATE, &state->flags);
956 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
958 write_seqlock(&state->seqlock);
959 nfs_set_open_stateid_locked(state, stateid, fmode);
960 write_sequnlock(&state->seqlock);
963 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
966 * Protect the call to nfs4_state_set_mode_locked and
967 * serialise the stateid update
969 write_seqlock(&state->seqlock);
970 if (deleg_stateid != NULL) {
971 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
972 set_bit(NFS_DELEGATED_STATE, &state->flags);
974 if (open_stateid != NULL)
975 nfs_set_open_stateid_locked(state, open_stateid, fmode);
976 write_sequnlock(&state->seqlock);
977 spin_lock(&state->owner->so_lock);
978 update_open_stateflags(state, fmode);
979 spin_unlock(&state->owner->so_lock);
982 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
984 struct nfs_inode *nfsi = NFS_I(state->inode);
985 struct nfs_delegation *deleg_cur;
988 fmode &= (FMODE_READ|FMODE_WRITE);
991 deleg_cur = rcu_dereference(nfsi->delegation);
992 if (deleg_cur == NULL)
995 spin_lock(&deleg_cur->lock);
996 if (nfsi->delegation != deleg_cur ||
997 (deleg_cur->type & fmode) != fmode)
998 goto no_delegation_unlock;
1000 if (delegation == NULL)
1001 delegation = &deleg_cur->stateid;
1002 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1003 goto no_delegation_unlock;
1005 nfs_mark_delegation_referenced(deleg_cur);
1006 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1008 no_delegation_unlock:
1009 spin_unlock(&deleg_cur->lock);
1013 if (!ret && open_stateid != NULL) {
1014 __update_open_stateid(state, open_stateid, NULL, fmode);
1022 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1024 struct nfs_delegation *delegation;
1027 delegation = rcu_dereference(NFS_I(inode)->delegation);
1028 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1033 nfs_inode_return_delegation(inode);
1036 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1038 struct nfs4_state *state = opendata->state;
1039 struct nfs_inode *nfsi = NFS_I(state->inode);
1040 struct nfs_delegation *delegation;
1041 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1042 fmode_t fmode = opendata->o_arg.fmode;
1043 nfs4_stateid stateid;
1047 if (can_open_cached(state, fmode, open_mode)) {
1048 spin_lock(&state->owner->so_lock);
1049 if (can_open_cached(state, fmode, open_mode)) {
1050 update_open_stateflags(state, fmode);
1051 spin_unlock(&state->owner->so_lock);
1052 goto out_return_state;
1054 spin_unlock(&state->owner->so_lock);
1057 delegation = rcu_dereference(nfsi->delegation);
1058 if (!can_open_delegated(delegation, fmode)) {
1062 /* Save the delegation */
1063 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1065 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1070 /* Try to update the stateid using the delegation */
1071 if (update_open_stateid(state, NULL, &stateid, fmode))
1072 goto out_return_state;
1075 return ERR_PTR(ret);
1077 atomic_inc(&state->count);
1081 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1083 struct inode *inode;
1084 struct nfs4_state *state = NULL;
1085 struct nfs_delegation *delegation;
1088 if (!data->rpc_done) {
1089 state = nfs4_try_open_cached(data);
1094 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1096 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1097 ret = PTR_ERR(inode);
1101 state = nfs4_get_open_state(inode, data->owner);
1104 if (data->o_res.delegation_type != 0) {
1105 int delegation_flags = 0;
1108 delegation = rcu_dereference(NFS_I(inode)->delegation);
1110 delegation_flags = delegation->flags;
1112 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1113 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1114 "returning a delegation for "
1115 "OPEN(CLAIM_DELEGATE_CUR)\n",
1116 NFS_CLIENT(inode)->cl_server);
1117 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1118 nfs_inode_set_delegation(state->inode,
1119 data->owner->so_cred,
1122 nfs_inode_reclaim_delegation(state->inode,
1123 data->owner->so_cred,
1127 update_open_stateid(state, &data->o_res.stateid, NULL,
1135 return ERR_PTR(ret);
1138 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1140 struct nfs_inode *nfsi = NFS_I(state->inode);
1141 struct nfs_open_context *ctx;
1143 spin_lock(&state->inode->i_lock);
1144 list_for_each_entry(ctx, &nfsi->open_files, list) {
1145 if (ctx->state != state)
1147 get_nfs_open_context(ctx);
1148 spin_unlock(&state->inode->i_lock);
1151 spin_unlock(&state->inode->i_lock);
1152 return ERR_PTR(-ENOENT);
1155 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1157 struct nfs4_opendata *opendata;
1159 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1160 if (opendata == NULL)
1161 return ERR_PTR(-ENOMEM);
1162 opendata->state = state;
1163 atomic_inc(&state->count);
1167 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1169 struct nfs4_state *newstate;
1172 opendata->o_arg.open_flags = 0;
1173 opendata->o_arg.fmode = fmode;
1174 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1175 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1176 nfs4_init_opendata_res(opendata);
1177 ret = _nfs4_recover_proc_open(opendata);
1180 newstate = nfs4_opendata_to_nfs4_state(opendata);
1181 if (IS_ERR(newstate))
1182 return PTR_ERR(newstate);
1183 nfs4_close_state(newstate, fmode);
1188 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1190 struct nfs4_state *newstate;
1193 /* memory barrier prior to reading state->n_* */
1194 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1196 if (state->n_rdwr != 0) {
1197 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1198 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1201 if (newstate != state)
1204 if (state->n_wronly != 0) {
1205 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1206 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1209 if (newstate != state)
1212 if (state->n_rdonly != 0) {
1213 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1214 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1217 if (newstate != state)
1221 * We may have performed cached opens for all three recoveries.
1222 * Check if we need to update the current stateid.
1224 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1225 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1226 write_seqlock(&state->seqlock);
1227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1228 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1229 write_sequnlock(&state->seqlock);
1236 * reclaim state on the server after a reboot.
1238 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1240 struct nfs_delegation *delegation;
1241 struct nfs4_opendata *opendata;
1242 fmode_t delegation_type = 0;
1245 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1246 if (IS_ERR(opendata))
1247 return PTR_ERR(opendata);
1248 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1249 opendata->o_arg.fh = NFS_FH(state->inode);
1251 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1252 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1253 delegation_type = delegation->type;
1255 opendata->o_arg.u.delegation_type = delegation_type;
1256 status = nfs4_open_recover(opendata, state);
1257 nfs4_opendata_put(opendata);
1261 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1263 struct nfs_server *server = NFS_SERVER(state->inode);
1264 struct nfs4_exception exception = { };
1267 err = _nfs4_do_open_reclaim(ctx, state);
1268 if (err != -NFS4ERR_DELAY)
1270 nfs4_handle_exception(server, err, &exception);
1271 } while (exception.retry);
1275 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1277 struct nfs_open_context *ctx;
1280 ctx = nfs4_state_find_open_context(state);
1282 return PTR_ERR(ctx);
1283 ret = nfs4_do_open_reclaim(ctx, state);
1284 put_nfs_open_context(ctx);
1288 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1290 struct nfs4_opendata *opendata;
1293 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1294 if (IS_ERR(opendata))
1295 return PTR_ERR(opendata);
1296 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1297 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1298 sizeof(opendata->o_arg.u.delegation.data));
1299 ret = nfs4_open_recover(opendata, state);
1300 nfs4_opendata_put(opendata);
1304 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1306 struct nfs4_exception exception = { };
1307 struct nfs_server *server = NFS_SERVER(state->inode);
1310 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1316 case -NFS4ERR_BADSESSION:
1317 case -NFS4ERR_BADSLOT:
1318 case -NFS4ERR_BAD_HIGH_SLOT:
1319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1320 case -NFS4ERR_DEADSESSION:
1321 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1323 case -NFS4ERR_STALE_CLIENTID:
1324 case -NFS4ERR_STALE_STATEID:
1325 case -NFS4ERR_EXPIRED:
1326 /* Don't recall a delegation if it was lost */
1327 nfs4_schedule_lease_recovery(server->nfs_client);
1331 * The show must go on: exit, but mark the
1332 * stateid as needing recovery.
1334 case -NFS4ERR_DELEG_REVOKED:
1335 case -NFS4ERR_ADMIN_REVOKED:
1336 case -NFS4ERR_BAD_STATEID:
1337 nfs_inode_find_state_and_recover(state->inode,
1339 nfs4_schedule_stateid_recovery(server, state);
1342 * User RPCSEC_GSS context has expired.
1343 * We cannot recover this stateid now, so
1344 * skip it and allow recovery thread to
1351 err = nfs4_handle_exception(server, err, &exception);
1352 } while (exception.retry);
1357 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1359 struct nfs4_opendata *data = calldata;
1361 data->rpc_status = task->tk_status;
1362 if (data->rpc_status == 0) {
1363 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1364 sizeof(data->o_res.stateid.data));
1365 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1366 renew_lease(data->o_res.server, data->timestamp);
1371 static void nfs4_open_confirm_release(void *calldata)
1373 struct nfs4_opendata *data = calldata;
1374 struct nfs4_state *state = NULL;
1376 /* If this request hasn't been cancelled, do nothing */
1377 if (data->cancelled == 0)
1379 /* In case of error, no cleanup! */
1380 if (!data->rpc_done)
1382 state = nfs4_opendata_to_nfs4_state(data);
1384 nfs4_close_state(state, data->o_arg.fmode);
1386 nfs4_opendata_put(data);
1389 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1390 .rpc_call_done = nfs4_open_confirm_done,
1391 .rpc_release = nfs4_open_confirm_release,
1395 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1397 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1399 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1400 struct rpc_task *task;
1401 struct rpc_message msg = {
1402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1403 .rpc_argp = &data->c_arg,
1404 .rpc_resp = &data->c_res,
1405 .rpc_cred = data->owner->so_cred,
1407 struct rpc_task_setup task_setup_data = {
1408 .rpc_client = server->client,
1409 .rpc_message = &msg,
1410 .callback_ops = &nfs4_open_confirm_ops,
1411 .callback_data = data,
1412 .workqueue = nfsiod_workqueue,
1413 .flags = RPC_TASK_ASYNC,
1417 kref_get(&data->kref);
1419 data->rpc_status = 0;
1420 data->timestamp = jiffies;
1421 task = rpc_run_task(&task_setup_data);
1423 return PTR_ERR(task);
1424 status = nfs4_wait_for_completion_rpc_task(task);
1426 data->cancelled = 1;
1429 status = data->rpc_status;
1434 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1436 struct nfs4_opendata *data = calldata;
1437 struct nfs4_state_owner *sp = data->owner;
1439 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1442 * Check if we still need to send an OPEN call, or if we can use
1443 * a delegation instead.
1445 if (data->state != NULL) {
1446 struct nfs_delegation *delegation;
1448 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1451 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1452 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1453 can_open_delegated(delegation, data->o_arg.fmode))
1454 goto unlock_no_action;
1457 /* Update sequence id. */
1458 data->o_arg.id = sp->so_owner_id.id;
1459 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1460 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1461 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1462 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1464 data->timestamp = jiffies;
1465 if (nfs4_setup_sequence(data->o_arg.server,
1466 &data->o_arg.seq_args,
1467 &data->o_res.seq_res, 1, task))
1469 rpc_call_start(task);
1474 task->tk_action = NULL;
1478 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1480 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1481 nfs4_open_prepare(task, calldata);
1484 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1486 struct nfs4_opendata *data = calldata;
1488 data->rpc_status = task->tk_status;
1490 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1493 if (task->tk_status == 0) {
1494 switch (data->o_res.f_attr->mode & S_IFMT) {
1498 data->rpc_status = -ELOOP;
1501 data->rpc_status = -EISDIR;
1504 data->rpc_status = -ENOTDIR;
1506 renew_lease(data->o_res.server, data->timestamp);
1507 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1508 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1513 static void nfs4_open_release(void *calldata)
1515 struct nfs4_opendata *data = calldata;
1516 struct nfs4_state *state = NULL;
1518 /* If this request hasn't been cancelled, do nothing */
1519 if (data->cancelled == 0)
1521 /* In case of error, no cleanup! */
1522 if (data->rpc_status != 0 || !data->rpc_done)
1524 /* In case we need an open_confirm, no cleanup! */
1525 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1527 state = nfs4_opendata_to_nfs4_state(data);
1529 nfs4_close_state(state, data->o_arg.fmode);
1531 nfs4_opendata_put(data);
1534 static const struct rpc_call_ops nfs4_open_ops = {
1535 .rpc_call_prepare = nfs4_open_prepare,
1536 .rpc_call_done = nfs4_open_done,
1537 .rpc_release = nfs4_open_release,
1540 static const struct rpc_call_ops nfs4_recover_open_ops = {
1541 .rpc_call_prepare = nfs4_recover_open_prepare,
1542 .rpc_call_done = nfs4_open_done,
1543 .rpc_release = nfs4_open_release,
1546 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1548 struct inode *dir = data->dir->d_inode;
1549 struct nfs_server *server = NFS_SERVER(dir);
1550 struct nfs_openargs *o_arg = &data->o_arg;
1551 struct nfs_openres *o_res = &data->o_res;
1552 struct rpc_task *task;
1553 struct rpc_message msg = {
1554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1557 .rpc_cred = data->owner->so_cred,
1559 struct rpc_task_setup task_setup_data = {
1560 .rpc_client = server->client,
1561 .rpc_message = &msg,
1562 .callback_ops = &nfs4_open_ops,
1563 .callback_data = data,
1564 .workqueue = nfsiod_workqueue,
1565 .flags = RPC_TASK_ASYNC,
1569 kref_get(&data->kref);
1571 data->rpc_status = 0;
1572 data->cancelled = 0;
1574 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1575 task = rpc_run_task(&task_setup_data);
1577 return PTR_ERR(task);
1578 status = nfs4_wait_for_completion_rpc_task(task);
1580 data->cancelled = 1;
1583 status = data->rpc_status;
1589 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1591 struct inode *dir = data->dir->d_inode;
1592 struct nfs_openres *o_res = &data->o_res;
1595 status = nfs4_run_open_task(data, 1);
1596 if (status != 0 || !data->rpc_done)
1599 nfs_refresh_inode(dir, o_res->dir_attr);
1601 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1602 status = _nfs4_proc_open_confirm(data);
1611 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1613 static int _nfs4_proc_open(struct nfs4_opendata *data)
1615 struct inode *dir = data->dir->d_inode;
1616 struct nfs_server *server = NFS_SERVER(dir);
1617 struct nfs_openargs *o_arg = &data->o_arg;
1618 struct nfs_openres *o_res = &data->o_res;
1621 status = nfs4_run_open_task(data, 0);
1622 if (!data->rpc_done)
1625 if (status == -NFS4ERR_BADNAME &&
1626 !(o_arg->open_flags & O_CREAT))
1631 if (o_arg->open_flags & O_CREAT) {
1632 update_changeattr(dir, &o_res->cinfo);
1633 nfs_post_op_update_inode(dir, o_res->dir_attr);
1635 nfs_refresh_inode(dir, o_res->dir_attr);
1636 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1637 server->caps &= ~NFS_CAP_POSIX_LOCK;
1638 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1639 status = _nfs4_proc_open_confirm(data);
1643 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1644 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1648 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1654 ret = nfs4_wait_clnt_recover(clp);
1657 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1658 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1660 nfs4_schedule_state_manager(clp);
1666 static int nfs4_recover_expired_lease(struct nfs_server *server)
1668 return nfs4_client_recover_expired_lease(server->nfs_client);
1673 * reclaim state on the server after a network partition.
1674 * Assumes caller holds the appropriate lock
1676 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1678 struct nfs4_opendata *opendata;
1681 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1682 if (IS_ERR(opendata))
1683 return PTR_ERR(opendata);
1684 ret = nfs4_open_recover(opendata, state);
1686 d_drop(ctx->dentry);
1687 nfs4_opendata_put(opendata);
1691 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1693 struct nfs_server *server = NFS_SERVER(state->inode);
1694 struct nfs4_exception exception = { };
1698 err = _nfs4_open_expired(ctx, state);
1702 case -NFS4ERR_GRACE:
1703 case -NFS4ERR_DELAY:
1704 nfs4_handle_exception(server, err, &exception);
1707 } while (exception.retry);
1712 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1714 struct nfs_open_context *ctx;
1717 ctx = nfs4_state_find_open_context(state);
1719 return PTR_ERR(ctx);
1720 ret = nfs4_do_open_expired(ctx, state);
1721 put_nfs_open_context(ctx);
1725 #if defined(CONFIG_NFS_V4_1)
1726 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1729 struct nfs_server *server = NFS_SERVER(state->inode);
1731 status = nfs41_test_stateid(server, state);
1732 if (status == NFS_OK)
1734 nfs41_free_stateid(server, state);
1735 return nfs4_open_expired(sp, state);
1740 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1741 * fields corresponding to attributes that were used to store the verifier.
1742 * Make sure we clobber those fields in the later setattr call
1744 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1746 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1747 !(sattr->ia_valid & ATTR_ATIME_SET))
1748 sattr->ia_valid |= ATTR_ATIME;
1750 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1751 !(sattr->ia_valid & ATTR_MTIME_SET))
1752 sattr->ia_valid |= ATTR_MTIME;
1756 * Returns a referenced nfs4_state
1758 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1760 struct nfs4_state_owner *sp;
1761 struct nfs4_state *state = NULL;
1762 struct nfs_server *server = NFS_SERVER(dir);
1763 struct nfs4_opendata *opendata;
1766 /* Protect against reboot recovery conflicts */
1768 if (!(sp = nfs4_get_state_owner(server, cred))) {
1769 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1772 status = nfs4_recover_expired_lease(server);
1774 goto err_put_state_owner;
1775 if (dentry->d_inode != NULL)
1776 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1778 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1779 if (opendata == NULL)
1780 goto err_put_state_owner;
1782 if (dentry->d_inode != NULL)
1783 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1785 status = _nfs4_proc_open(opendata);
1787 goto err_opendata_put;
1789 state = nfs4_opendata_to_nfs4_state(opendata);
1790 status = PTR_ERR(state);
1792 goto err_opendata_put;
1793 if (server->caps & NFS_CAP_POSIX_LOCK)
1794 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1796 if (opendata->o_arg.open_flags & O_EXCL) {
1797 nfs4_exclusive_attrset(opendata, sattr);
1799 nfs_fattr_init(opendata->o_res.f_attr);
1800 status = nfs4_do_setattr(state->inode, cred,
1801 opendata->o_res.f_attr, sattr,
1804 nfs_setattr_update_inode(state->inode, sattr);
1805 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1807 nfs_revalidate_inode(server, state->inode);
1808 nfs4_opendata_put(opendata);
1809 nfs4_put_state_owner(sp);
1813 nfs4_opendata_put(opendata);
1814 err_put_state_owner:
1815 nfs4_put_state_owner(sp);
1822 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1824 struct nfs4_exception exception = { };
1825 struct nfs4_state *res;
1828 fmode &= FMODE_READ|FMODE_WRITE;
1830 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1833 /* NOTE: BAD_SEQID means the server and client disagree about the
1834 * book-keeping w.r.t. state-changing operations
1835 * (OPEN/CLOSE/LOCK/LOCKU...)
1836 * It is actually a sign of a bug on the client or on the server.
1838 * If we receive a BAD_SEQID error in the particular case of
1839 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1840 * have unhashed the old state_owner for us, and that we can
1841 * therefore safely retry using a new one. We should still warn
1842 * the user though...
1844 if (status == -NFS4ERR_BAD_SEQID) {
1845 pr_warn_ratelimited("NFS: v4 server %s "
1846 " returned a bad sequence-id error!\n",
1847 NFS_SERVER(dir)->nfs_client->cl_hostname);
1848 exception.retry = 1;
1852 * BAD_STATEID on OPEN means that the server cancelled our
1853 * state before it received the OPEN_CONFIRM.
1854 * Recover by retrying the request as per the discussion
1855 * on Page 181 of RFC3530.
1857 if (status == -NFS4ERR_BAD_STATEID) {
1858 exception.retry = 1;
1861 if (status == -EAGAIN) {
1862 /* We must have found a delegation */
1863 exception.retry = 1;
1866 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1867 status, &exception));
1868 } while (exception.retry);
1872 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1873 struct nfs_fattr *fattr, struct iattr *sattr,
1874 struct nfs4_state *state)
1876 struct nfs_server *server = NFS_SERVER(inode);
1877 struct nfs_setattrargs arg = {
1878 .fh = NFS_FH(inode),
1881 .bitmask = server->attr_bitmask,
1883 struct nfs_setattrres res = {
1887 struct rpc_message msg = {
1888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1893 unsigned long timestamp = jiffies;
1896 nfs_fattr_init(fattr);
1898 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1899 /* Use that stateid */
1900 } else if (state != NULL) {
1901 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1903 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1905 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1906 if (status == 0 && state != NULL)
1907 renew_lease(server, timestamp);
1911 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1912 struct nfs_fattr *fattr, struct iattr *sattr,
1913 struct nfs4_state *state)
1915 struct nfs_server *server = NFS_SERVER(inode);
1916 struct nfs4_exception exception = {
1922 err = nfs4_handle_exception(server,
1923 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1925 } while (exception.retry);
1929 struct nfs4_closedata {
1930 struct inode *inode;
1931 struct nfs4_state *state;
1932 struct nfs_closeargs arg;
1933 struct nfs_closeres res;
1934 struct nfs_fattr fattr;
1935 unsigned long timestamp;
1940 static void nfs4_free_closedata(void *data)
1942 struct nfs4_closedata *calldata = data;
1943 struct nfs4_state_owner *sp = calldata->state->owner;
1944 struct super_block *sb = calldata->state->inode->i_sb;
1947 pnfs_roc_release(calldata->state->inode);
1948 nfs4_put_open_state(calldata->state);
1949 nfs_free_seqid(calldata->arg.seqid);
1950 nfs4_put_state_owner(sp);
1951 nfs_sb_deactive(sb);
1955 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1958 spin_lock(&state->owner->so_lock);
1959 if (!(fmode & FMODE_READ))
1960 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1961 if (!(fmode & FMODE_WRITE))
1962 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1963 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1964 spin_unlock(&state->owner->so_lock);
1967 static void nfs4_close_done(struct rpc_task *task, void *data)
1969 struct nfs4_closedata *calldata = data;
1970 struct nfs4_state *state = calldata->state;
1971 struct nfs_server *server = NFS_SERVER(calldata->inode);
1973 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1975 /* hmm. we are done with the inode, and in the process of freeing
1976 * the state_owner. we keep this around to process errors
1978 switch (task->tk_status) {
1981 pnfs_roc_set_barrier(state->inode,
1982 calldata->roc_barrier);
1983 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1984 renew_lease(server, calldata->timestamp);
1985 nfs4_close_clear_stateid_flags(state,
1986 calldata->arg.fmode);
1988 case -NFS4ERR_STALE_STATEID:
1989 case -NFS4ERR_OLD_STATEID:
1990 case -NFS4ERR_BAD_STATEID:
1991 case -NFS4ERR_EXPIRED:
1992 if (calldata->arg.fmode == 0)
1995 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1996 rpc_restart_call_prepare(task);
1998 nfs_release_seqid(calldata->arg.seqid);
1999 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2002 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2004 struct nfs4_closedata *calldata = data;
2005 struct nfs4_state *state = calldata->state;
2008 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2011 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2012 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2013 spin_lock(&state->owner->so_lock);
2014 /* Calculate the change in open mode */
2015 if (state->n_rdwr == 0) {
2016 if (state->n_rdonly == 0) {
2017 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2018 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2019 calldata->arg.fmode &= ~FMODE_READ;
2021 if (state->n_wronly == 0) {
2022 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2023 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2024 calldata->arg.fmode &= ~FMODE_WRITE;
2027 spin_unlock(&state->owner->so_lock);
2030 /* Note: exit _without_ calling nfs4_close_done */
2031 task->tk_action = NULL;
2035 if (calldata->arg.fmode == 0) {
2036 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2037 if (calldata->roc &&
2038 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2039 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2045 nfs_fattr_init(calldata->res.fattr);
2046 calldata->timestamp = jiffies;
2047 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2048 &calldata->arg.seq_args, &calldata->res.seq_res,
2051 rpc_call_start(task);
2054 static const struct rpc_call_ops nfs4_close_ops = {
2055 .rpc_call_prepare = nfs4_close_prepare,
2056 .rpc_call_done = nfs4_close_done,
2057 .rpc_release = nfs4_free_closedata,
2061 * It is possible for data to be read/written from a mem-mapped file
2062 * after the sys_close call (which hits the vfs layer as a flush).
2063 * This means that we can't safely call nfsv4 close on a file until
2064 * the inode is cleared. This in turn means that we are not good
2065 * NFSv4 citizens - we do not indicate to the server to update the file's
2066 * share state even when we are done with one of the three share
2067 * stateid's in the inode.
2069 * NOTE: Caller must be holding the sp->so_owner semaphore!
2071 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2073 struct nfs_server *server = NFS_SERVER(state->inode);
2074 struct nfs4_closedata *calldata;
2075 struct nfs4_state_owner *sp = state->owner;
2076 struct rpc_task *task;
2077 struct rpc_message msg = {
2078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2079 .rpc_cred = state->owner->so_cred,
2081 struct rpc_task_setup task_setup_data = {
2082 .rpc_client = server->client,
2083 .rpc_message = &msg,
2084 .callback_ops = &nfs4_close_ops,
2085 .workqueue = nfsiod_workqueue,
2086 .flags = RPC_TASK_ASYNC,
2088 int status = -ENOMEM;
2090 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2091 if (calldata == NULL)
2093 calldata->inode = state->inode;
2094 calldata->state = state;
2095 calldata->arg.fh = NFS_FH(state->inode);
2096 calldata->arg.stateid = &state->open_stateid;
2097 /* Serialization for the sequence id */
2098 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2099 if (calldata->arg.seqid == NULL)
2100 goto out_free_calldata;
2101 calldata->arg.fmode = 0;
2102 calldata->arg.bitmask = server->cache_consistency_bitmask;
2103 calldata->res.fattr = &calldata->fattr;
2104 calldata->res.seqid = calldata->arg.seqid;
2105 calldata->res.server = server;
2106 calldata->roc = roc;
2107 nfs_sb_active(calldata->inode->i_sb);
2109 msg.rpc_argp = &calldata->arg;
2110 msg.rpc_resp = &calldata->res;
2111 task_setup_data.callback_data = calldata;
2112 task = rpc_run_task(&task_setup_data);
2114 return PTR_ERR(task);
2117 status = rpc_wait_for_completion_task(task);
2124 pnfs_roc_release(state->inode);
2125 nfs4_put_open_state(state);
2126 nfs4_put_state_owner(sp);
2130 static struct inode *
2131 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2133 struct nfs4_state *state;
2135 /* Protect against concurrent sillydeletes */
2136 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2138 return ERR_CAST(state);
2140 return igrab(state->inode);
2143 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2145 if (ctx->state == NULL)
2148 nfs4_close_sync(ctx->state, ctx->mode);
2150 nfs4_close_state(ctx->state, ctx->mode);
2153 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2155 struct nfs4_server_caps_arg args = {
2158 struct nfs4_server_caps_res res = {};
2159 struct rpc_message msg = {
2160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2166 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2168 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2169 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2170 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2171 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2172 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2173 NFS_CAP_CTIME|NFS_CAP_MTIME);
2174 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2175 server->caps |= NFS_CAP_ACLS;
2176 if (res.has_links != 0)
2177 server->caps |= NFS_CAP_HARDLINKS;
2178 if (res.has_symlinks != 0)
2179 server->caps |= NFS_CAP_SYMLINKS;
2180 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2181 server->caps |= NFS_CAP_FILEID;
2182 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2183 server->caps |= NFS_CAP_MODE;
2184 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2185 server->caps |= NFS_CAP_NLINK;
2186 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2187 server->caps |= NFS_CAP_OWNER;
2188 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2189 server->caps |= NFS_CAP_OWNER_GROUP;
2190 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2191 server->caps |= NFS_CAP_ATIME;
2192 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2193 server->caps |= NFS_CAP_CTIME;
2194 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2195 server->caps |= NFS_CAP_MTIME;
2197 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2198 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2199 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2200 server->acl_bitmask = res.acl_bitmask;
2206 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2208 struct nfs4_exception exception = { };
2211 err = nfs4_handle_exception(server,
2212 _nfs4_server_capabilities(server, fhandle),
2214 } while (exception.retry);
2218 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2219 struct nfs_fsinfo *info)
2221 struct nfs4_lookup_root_arg args = {
2222 .bitmask = nfs4_fattr_bitmap,
2224 struct nfs4_lookup_res res = {
2226 .fattr = info->fattr,
2229 struct rpc_message msg = {
2230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2235 nfs_fattr_init(info->fattr);
2236 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2239 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2240 struct nfs_fsinfo *info)
2242 struct nfs4_exception exception = { };
2245 err = _nfs4_lookup_root(server, fhandle, info);
2248 case -NFS4ERR_WRONGSEC:
2251 err = nfs4_handle_exception(server, err, &exception);
2253 } while (exception.retry);
2258 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2259 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2261 struct rpc_auth *auth;
2264 auth = rpcauth_create(flavor, server->client);
2269 ret = nfs4_lookup_root(server, fhandle, info);
2274 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2275 struct nfs_fsinfo *info)
2277 int i, len, status = 0;
2278 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2280 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2281 flav_array[len] = RPC_AUTH_NULL;
2284 for (i = 0; i < len; i++) {
2285 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2286 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2291 * -EACCESS could mean that the user doesn't have correct permissions
2292 * to access the mount. It could also mean that we tried to mount
2293 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2294 * existing mount programs don't handle -EACCES very well so it should
2295 * be mapped to -EPERM instead.
2297 if (status == -EACCES)
2303 * get the file handle for the "/" directory on the server
2305 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2306 struct nfs_fsinfo *info)
2308 int minor_version = server->nfs_client->cl_minorversion;
2309 int status = nfs4_lookup_root(server, fhandle, info);
2310 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2312 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2313 * by nfs4_map_errors() as this function exits.
2315 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2317 status = nfs4_server_capabilities(server, fhandle);
2319 status = nfs4_do_fsinfo(server, fhandle, info);
2320 return nfs4_map_errors(status);
2323 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2325 * Get locations and (maybe) other attributes of a referral.
2326 * Note that we'll actually follow the referral later when
2327 * we detect fsid mismatch in inode revalidation
2329 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2330 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2332 int status = -ENOMEM;
2333 struct page *page = NULL;
2334 struct nfs4_fs_locations *locations = NULL;
2336 page = alloc_page(GFP_KERNEL);
2339 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2340 if (locations == NULL)
2343 status = nfs4_proc_fs_locations(dir, name, locations, page);
2346 /* Make sure server returned a different fsid for the referral */
2347 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2348 dprintk("%s: server did not return a different fsid for"
2349 " a referral at %s\n", __func__, name->name);
2353 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2354 nfs_fixup_referral_attributes(&locations->fattr);
2356 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2357 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2358 memset(fhandle, 0, sizeof(struct nfs_fh));
2366 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2368 struct nfs4_getattr_arg args = {
2370 .bitmask = server->attr_bitmask,
2372 struct nfs4_getattr_res res = {
2376 struct rpc_message msg = {
2377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2382 nfs_fattr_init(fattr);
2383 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2386 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2388 struct nfs4_exception exception = { };
2391 err = nfs4_handle_exception(server,
2392 _nfs4_proc_getattr(server, fhandle, fattr),
2394 } while (exception.retry);
2399 * The file is not closed if it is opened due to the a request to change
2400 * the size of the file. The open call will not be needed once the
2401 * VFS layer lookup-intents are implemented.
2403 * Close is called when the inode is destroyed.
2404 * If we haven't opened the file for O_WRONLY, we
2405 * need to in the size_change case to obtain a stateid.
2408 * Because OPEN is always done by name in nfsv4, it is
2409 * possible that we opened a different file by the same
2410 * name. We can recognize this race condition, but we
2411 * can't do anything about it besides returning an error.
2413 * This will be fixed with VFS changes (lookup-intent).
2416 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2417 struct iattr *sattr)
2419 struct inode *inode = dentry->d_inode;
2420 struct rpc_cred *cred = NULL;
2421 struct nfs4_state *state = NULL;
2424 if (pnfs_ld_layoutret_on_setattr(inode))
2425 pnfs_return_layout(inode);
2427 nfs_fattr_init(fattr);
2429 /* Search for an existing open(O_WRITE) file */
2430 if (sattr->ia_valid & ATTR_FILE) {
2431 struct nfs_open_context *ctx;
2433 ctx = nfs_file_open_context(sattr->ia_file);
2440 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2442 nfs_setattr_update_inode(inode, sattr);
2446 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2447 const struct qstr *name, struct nfs_fh *fhandle,
2448 struct nfs_fattr *fattr)
2450 struct nfs_server *server = NFS_SERVER(dir);
2452 struct nfs4_lookup_arg args = {
2453 .bitmask = server->attr_bitmask,
2454 .dir_fh = NFS_FH(dir),
2457 struct nfs4_lookup_res res = {
2462 struct rpc_message msg = {
2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2468 nfs_fattr_init(fattr);
2470 dprintk("NFS call lookup %s\n", name->name);
2471 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2472 dprintk("NFS reply lookup: %d\n", status);
2476 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2478 memset(fh, 0, sizeof(struct nfs_fh));
2479 fattr->fsid.major = 1;
2480 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2481 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2482 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2486 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2487 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2489 struct nfs4_exception exception = { };
2494 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2496 case -NFS4ERR_BADNAME:
2498 case -NFS4ERR_MOVED:
2499 return nfs4_get_referral(dir, name, fattr, fhandle);
2500 case -NFS4ERR_WRONGSEC:
2501 nfs_fixup_secinfo_attributes(fattr, fhandle);
2503 err = nfs4_handle_exception(NFS_SERVER(dir),
2504 status, &exception);
2505 } while (exception.retry);
2509 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2511 struct nfs_server *server = NFS_SERVER(inode);
2512 struct nfs4_accessargs args = {
2513 .fh = NFS_FH(inode),
2514 .bitmask = server->attr_bitmask,
2516 struct nfs4_accessres res = {
2519 struct rpc_message msg = {
2520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2523 .rpc_cred = entry->cred,
2525 int mode = entry->mask;
2529 * Determine which access bits we want to ask for...
2531 if (mode & MAY_READ)
2532 args.access |= NFS4_ACCESS_READ;
2533 if (S_ISDIR(inode->i_mode)) {
2534 if (mode & MAY_WRITE)
2535 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2536 if (mode & MAY_EXEC)
2537 args.access |= NFS4_ACCESS_LOOKUP;
2539 if (mode & MAY_WRITE)
2540 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2541 if (mode & MAY_EXEC)
2542 args.access |= NFS4_ACCESS_EXECUTE;
2545 res.fattr = nfs_alloc_fattr();
2546 if (res.fattr == NULL)
2549 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2552 if (res.access & NFS4_ACCESS_READ)
2553 entry->mask |= MAY_READ;
2554 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2555 entry->mask |= MAY_WRITE;
2556 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2557 entry->mask |= MAY_EXEC;
2558 nfs_refresh_inode(inode, res.fattr);
2560 nfs_free_fattr(res.fattr);
2564 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2566 struct nfs4_exception exception = { };
2569 err = nfs4_handle_exception(NFS_SERVER(inode),
2570 _nfs4_proc_access(inode, entry),
2572 } while (exception.retry);
2577 * TODO: For the time being, we don't try to get any attributes
2578 * along with any of the zero-copy operations READ, READDIR,
2581 * In the case of the first three, we want to put the GETATTR
2582 * after the read-type operation -- this is because it is hard
2583 * to predict the length of a GETATTR response in v4, and thus
2584 * align the READ data correctly. This means that the GETATTR
2585 * may end up partially falling into the page cache, and we should
2586 * shift it into the 'tail' of the xdr_buf before processing.
2587 * To do this efficiently, we need to know the total length
2588 * of data received, which doesn't seem to be available outside
2591 * In the case of WRITE, we also want to put the GETATTR after
2592 * the operation -- in this case because we want to make sure
2593 * we get the post-operation mtime and size. This means that
2594 * we can't use xdr_encode_pages() as written: we need a variant
2595 * of it which would leave room in the 'tail' iovec.
2597 * Both of these changes to the XDR layer would in fact be quite
2598 * minor, but I decided to leave them for a subsequent patch.
2600 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2601 unsigned int pgbase, unsigned int pglen)
2603 struct nfs4_readlink args = {
2604 .fh = NFS_FH(inode),
2609 struct nfs4_readlink_res res;
2610 struct rpc_message msg = {
2611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2616 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2619 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2620 unsigned int pgbase, unsigned int pglen)
2622 struct nfs4_exception exception = { };
2625 err = nfs4_handle_exception(NFS_SERVER(inode),
2626 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2628 } while (exception.retry);
2634 * We will need to arrange for the VFS layer to provide an atomic open.
2635 * Until then, this create/open method is prone to inefficiency and race
2636 * conditions due to the lookup, create, and open VFS calls from sys_open()
2637 * placed on the wire.
2639 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2640 * The file will be opened again in the subsequent VFS open call
2641 * (nfs4_proc_file_open).
2643 * The open for read will just hang around to be used by any process that
2644 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2648 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2649 int flags, struct nfs_open_context *ctx)
2651 struct dentry *de = dentry;
2652 struct nfs4_state *state;
2653 struct rpc_cred *cred = NULL;
2662 sattr->ia_mode &= ~current_umask();
2663 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2665 if (IS_ERR(state)) {
2666 status = PTR_ERR(state);
2669 d_add(dentry, igrab(state->inode));
2670 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2674 nfs4_close_sync(state, fmode);
2679 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2681 struct nfs_server *server = NFS_SERVER(dir);
2682 struct nfs_removeargs args = {
2684 .name.len = name->len,
2685 .name.name = name->name,
2686 .bitmask = server->attr_bitmask,
2688 struct nfs_removeres res = {
2691 struct rpc_message msg = {
2692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2696 int status = -ENOMEM;
2698 res.dir_attr = nfs_alloc_fattr();
2699 if (res.dir_attr == NULL)
2702 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2704 update_changeattr(dir, &res.cinfo);
2705 nfs_post_op_update_inode(dir, res.dir_attr);
2707 nfs_free_fattr(res.dir_attr);
2712 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2714 struct nfs4_exception exception = { };
2717 err = nfs4_handle_exception(NFS_SERVER(dir),
2718 _nfs4_proc_remove(dir, name),
2720 } while (exception.retry);
2724 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2726 struct nfs_server *server = NFS_SERVER(dir);
2727 struct nfs_removeargs *args = msg->rpc_argp;
2728 struct nfs_removeres *res = msg->rpc_resp;
2730 args->bitmask = server->cache_consistency_bitmask;
2731 res->server = server;
2732 res->seq_res.sr_slot = NULL;
2733 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2736 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2738 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2740 if (!nfs4_sequence_done(task, &res->seq_res))
2742 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2744 update_changeattr(dir, &res->cinfo);
2745 nfs_post_op_update_inode(dir, res->dir_attr);
2749 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2751 struct nfs_server *server = NFS_SERVER(dir);
2752 struct nfs_renameargs *arg = msg->rpc_argp;
2753 struct nfs_renameres *res = msg->rpc_resp;
2755 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2756 arg->bitmask = server->attr_bitmask;
2757 res->server = server;
2760 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2761 struct inode *new_dir)
2763 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2765 if (!nfs4_sequence_done(task, &res->seq_res))
2767 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2770 update_changeattr(old_dir, &res->old_cinfo);
2771 nfs_post_op_update_inode(old_dir, res->old_fattr);
2772 update_changeattr(new_dir, &res->new_cinfo);
2773 nfs_post_op_update_inode(new_dir, res->new_fattr);
2777 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2778 struct inode *new_dir, struct qstr *new_name)
2780 struct nfs_server *server = NFS_SERVER(old_dir);
2781 struct nfs_renameargs arg = {
2782 .old_dir = NFS_FH(old_dir),
2783 .new_dir = NFS_FH(new_dir),
2784 .old_name = old_name,
2785 .new_name = new_name,
2786 .bitmask = server->attr_bitmask,
2788 struct nfs_renameres res = {
2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2796 int status = -ENOMEM;
2798 res.old_fattr = nfs_alloc_fattr();
2799 res.new_fattr = nfs_alloc_fattr();
2800 if (res.old_fattr == NULL || res.new_fattr == NULL)
2803 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2805 update_changeattr(old_dir, &res.old_cinfo);
2806 nfs_post_op_update_inode(old_dir, res.old_fattr);
2807 update_changeattr(new_dir, &res.new_cinfo);
2808 nfs_post_op_update_inode(new_dir, res.new_fattr);
2811 nfs_free_fattr(res.new_fattr);
2812 nfs_free_fattr(res.old_fattr);
2816 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2817 struct inode *new_dir, struct qstr *new_name)
2819 struct nfs4_exception exception = { };
2822 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2823 _nfs4_proc_rename(old_dir, old_name,
2826 } while (exception.retry);
2830 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2832 struct nfs_server *server = NFS_SERVER(inode);
2833 struct nfs4_link_arg arg = {
2834 .fh = NFS_FH(inode),
2835 .dir_fh = NFS_FH(dir),
2837 .bitmask = server->attr_bitmask,
2839 struct nfs4_link_res res = {
2842 struct rpc_message msg = {
2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2847 int status = -ENOMEM;
2849 res.fattr = nfs_alloc_fattr();
2850 res.dir_attr = nfs_alloc_fattr();
2851 if (res.fattr == NULL || res.dir_attr == NULL)
2854 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2856 update_changeattr(dir, &res.cinfo);
2857 nfs_post_op_update_inode(dir, res.dir_attr);
2858 nfs_post_op_update_inode(inode, res.fattr);
2861 nfs_free_fattr(res.dir_attr);
2862 nfs_free_fattr(res.fattr);
2866 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2868 struct nfs4_exception exception = { };
2871 err = nfs4_handle_exception(NFS_SERVER(inode),
2872 _nfs4_proc_link(inode, dir, name),
2874 } while (exception.retry);
2878 struct nfs4_createdata {
2879 struct rpc_message msg;
2880 struct nfs4_create_arg arg;
2881 struct nfs4_create_res res;
2883 struct nfs_fattr fattr;
2884 struct nfs_fattr dir_fattr;
2887 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2888 struct qstr *name, struct iattr *sattr, u32 ftype)
2890 struct nfs4_createdata *data;
2892 data = kzalloc(sizeof(*data), GFP_KERNEL);
2894 struct nfs_server *server = NFS_SERVER(dir);
2896 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2897 data->msg.rpc_argp = &data->arg;
2898 data->msg.rpc_resp = &data->res;
2899 data->arg.dir_fh = NFS_FH(dir);
2900 data->arg.server = server;
2901 data->arg.name = name;
2902 data->arg.attrs = sattr;
2903 data->arg.ftype = ftype;
2904 data->arg.bitmask = server->attr_bitmask;
2905 data->res.server = server;
2906 data->res.fh = &data->fh;
2907 data->res.fattr = &data->fattr;
2908 data->res.dir_fattr = &data->dir_fattr;
2909 nfs_fattr_init(data->res.fattr);
2910 nfs_fattr_init(data->res.dir_fattr);
2915 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2917 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2918 &data->arg.seq_args, &data->res.seq_res, 1);
2920 update_changeattr(dir, &data->res.dir_cinfo);
2921 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2922 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2927 static void nfs4_free_createdata(struct nfs4_createdata *data)
2932 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2933 struct page *page, unsigned int len, struct iattr *sattr)
2935 struct nfs4_createdata *data;
2936 int status = -ENAMETOOLONG;
2938 if (len > NFS4_MAXPATHLEN)
2942 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2946 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2947 data->arg.u.symlink.pages = &page;
2948 data->arg.u.symlink.len = len;
2950 status = nfs4_do_create(dir, dentry, data);
2952 nfs4_free_createdata(data);
2957 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2958 struct page *page, unsigned int len, struct iattr *sattr)
2960 struct nfs4_exception exception = { };
2963 err = nfs4_handle_exception(NFS_SERVER(dir),
2964 _nfs4_proc_symlink(dir, dentry, page,
2967 } while (exception.retry);
2971 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2972 struct iattr *sattr)
2974 struct nfs4_createdata *data;
2975 int status = -ENOMEM;
2977 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2981 status = nfs4_do_create(dir, dentry, data);
2983 nfs4_free_createdata(data);
2988 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2989 struct iattr *sattr)
2991 struct nfs4_exception exception = { };
2994 sattr->ia_mode &= ~current_umask();
2996 err = nfs4_handle_exception(NFS_SERVER(dir),
2997 _nfs4_proc_mkdir(dir, dentry, sattr),
2999 } while (exception.retry);
3003 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3004 u64 cookie, struct page **pages, unsigned int count, int plus)
3006 struct inode *dir = dentry->d_inode;
3007 struct nfs4_readdir_arg args = {
3012 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3015 struct nfs4_readdir_res res;
3016 struct rpc_message msg = {
3017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3024 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3025 dentry->d_parent->d_name.name,
3026 dentry->d_name.name,
3027 (unsigned long long)cookie);
3028 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3029 res.pgbase = args.pgbase;
3030 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3032 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3033 status += args.pgbase;
3036 nfs_invalidate_atime(dir);
3038 dprintk("%s: returns %d\n", __func__, status);
3042 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3043 u64 cookie, struct page **pages, unsigned int count, int plus)
3045 struct nfs4_exception exception = { };
3048 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3049 _nfs4_proc_readdir(dentry, cred, cookie,
3050 pages, count, plus),
3052 } while (exception.retry);
3056 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3057 struct iattr *sattr, dev_t rdev)
3059 struct nfs4_createdata *data;
3060 int mode = sattr->ia_mode;
3061 int status = -ENOMEM;
3063 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3064 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3066 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3071 data->arg.ftype = NF4FIFO;
3072 else if (S_ISBLK(mode)) {
3073 data->arg.ftype = NF4BLK;
3074 data->arg.u.device.specdata1 = MAJOR(rdev);
3075 data->arg.u.device.specdata2 = MINOR(rdev);
3077 else if (S_ISCHR(mode)) {
3078 data->arg.ftype = NF4CHR;
3079 data->arg.u.device.specdata1 = MAJOR(rdev);
3080 data->arg.u.device.specdata2 = MINOR(rdev);
3083 status = nfs4_do_create(dir, dentry, data);
3085 nfs4_free_createdata(data);
3090 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3091 struct iattr *sattr, dev_t rdev)
3093 struct nfs4_exception exception = { };
3096 sattr->ia_mode &= ~current_umask();
3098 err = nfs4_handle_exception(NFS_SERVER(dir),
3099 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3101 } while (exception.retry);
3105 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3106 struct nfs_fsstat *fsstat)
3108 struct nfs4_statfs_arg args = {
3110 .bitmask = server->attr_bitmask,
3112 struct nfs4_statfs_res res = {
3115 struct rpc_message msg = {
3116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3121 nfs_fattr_init(fsstat->fattr);
3122 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3125 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3127 struct nfs4_exception exception = { };
3130 err = nfs4_handle_exception(server,
3131 _nfs4_proc_statfs(server, fhandle, fsstat),
3133 } while (exception.retry);
3137 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3138 struct nfs_fsinfo *fsinfo)
3140 struct nfs4_fsinfo_arg args = {
3142 .bitmask = server->attr_bitmask,
3144 struct nfs4_fsinfo_res res = {
3147 struct rpc_message msg = {
3148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3153 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3156 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3158 struct nfs4_exception exception = { };
3162 err = nfs4_handle_exception(server,
3163 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3165 } while (exception.retry);
3169 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3171 nfs_fattr_init(fsinfo->fattr);
3172 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3175 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_pathconf *pathconf)
3178 struct nfs4_pathconf_arg args = {
3180 .bitmask = server->attr_bitmask,
3182 struct nfs4_pathconf_res res = {
3183 .pathconf = pathconf,
3185 struct rpc_message msg = {
3186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3191 /* None of the pathconf attributes are mandatory to implement */
3192 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3193 memset(pathconf, 0, sizeof(*pathconf));
3197 nfs_fattr_init(pathconf->fattr);
3198 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3201 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3202 struct nfs_pathconf *pathconf)
3204 struct nfs4_exception exception = { };
3208 err = nfs4_handle_exception(server,
3209 _nfs4_proc_pathconf(server, fhandle, pathconf),
3211 } while (exception.retry);
3215 void __nfs4_read_done_cb(struct nfs_read_data *data)
3217 nfs_invalidate_atime(data->inode);
3220 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3222 struct nfs_server *server = NFS_SERVER(data->inode);
3224 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3225 rpc_restart_call_prepare(task);
3229 __nfs4_read_done_cb(data);
3230 if (task->tk_status > 0)
3231 renew_lease(server, data->timestamp);
3235 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3238 dprintk("--> %s\n", __func__);
3240 if (!nfs4_sequence_done(task, &data->res.seq_res))
3243 return data->read_done_cb ? data->read_done_cb(task, data) :
3244 nfs4_read_done_cb(task, data);
3247 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3249 data->timestamp = jiffies;
3250 data->read_done_cb = nfs4_read_done_cb;
3251 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3254 /* Reset the the nfs_read_data to send the read to the MDS. */
3255 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3257 dprintk("%s Reset task for i/o through\n", __func__);
3258 put_lseg(data->lseg);
3260 /* offsets will differ in the dense stripe case */
3261 data->args.offset = data->mds_offset;
3262 data->ds_clp = NULL;
3263 data->args.fh = NFS_FH(data->inode);
3264 data->read_done_cb = nfs4_read_done_cb;
3265 task->tk_ops = data->mds_ops;
3266 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3268 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3270 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3272 struct inode *inode = data->inode;
3274 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3275 rpc_restart_call_prepare(task);
3278 if (task->tk_status >= 0) {
3279 renew_lease(NFS_SERVER(inode), data->timestamp);
3280 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3285 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3287 if (!nfs4_sequence_done(task, &data->res.seq_res))
3289 return data->write_done_cb ? data->write_done_cb(task, data) :
3290 nfs4_write_done_cb(task, data);
3293 /* Reset the the nfs_write_data to send the write to the MDS. */
3294 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3296 dprintk("%s Reset task for i/o through\n", __func__);
3297 put_lseg(data->lseg);
3299 data->ds_clp = NULL;
3300 data->write_done_cb = nfs4_write_done_cb;
3301 data->args.fh = NFS_FH(data->inode);
3302 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3303 data->args.offset = data->mds_offset;
3304 data->res.fattr = &data->fattr;
3305 task->tk_ops = data->mds_ops;
3306 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3308 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3310 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3312 struct nfs_server *server = NFS_SERVER(data->inode);
3315 data->args.bitmask = NULL;
3316 data->res.fattr = NULL;
3318 data->args.bitmask = server->cache_consistency_bitmask;
3319 if (!data->write_done_cb)
3320 data->write_done_cb = nfs4_write_done_cb;
3321 data->res.server = server;
3322 data->timestamp = jiffies;
3324 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3327 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3329 struct inode *inode = data->inode;
3331 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3332 rpc_restart_call_prepare(task);
3335 nfs_refresh_inode(inode, data->res.fattr);
3339 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3341 if (!nfs4_sequence_done(task, &data->res.seq_res))
3343 return data->write_done_cb(task, data);
3346 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3348 struct nfs_server *server = NFS_SERVER(data->inode);
3351 data->args.bitmask = NULL;
3352 data->res.fattr = NULL;
3354 data->args.bitmask = server->cache_consistency_bitmask;
3355 if (!data->write_done_cb)
3356 data->write_done_cb = nfs4_commit_done_cb;
3357 data->res.server = server;
3358 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3361 struct nfs4_renewdata {
3362 struct nfs_client *client;
3363 unsigned long timestamp;
3367 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3368 * standalone procedure for queueing an asynchronous RENEW.
3370 static void nfs4_renew_release(void *calldata)
3372 struct nfs4_renewdata *data = calldata;
3373 struct nfs_client *clp = data->client;
3375 if (atomic_read(&clp->cl_count) > 1)
3376 nfs4_schedule_state_renewal(clp);
3377 nfs_put_client(clp);
3381 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3383 struct nfs4_renewdata *data = calldata;
3384 struct nfs_client *clp = data->client;
3385 unsigned long timestamp = data->timestamp;
3387 if (task->tk_status < 0) {
3388 /* Unless we're shutting down, schedule state recovery! */
3389 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3391 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3392 nfs4_schedule_lease_recovery(clp);
3395 nfs4_schedule_path_down_recovery(clp);
3397 do_renew_lease(clp, timestamp);
3400 static const struct rpc_call_ops nfs4_renew_ops = {
3401 .rpc_call_done = nfs4_renew_done,
3402 .rpc_release = nfs4_renew_release,
3405 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3407 struct rpc_message msg = {
3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3412 struct nfs4_renewdata *data;
3414 if (renew_flags == 0)
3416 if (!atomic_inc_not_zero(&clp->cl_count))
3418 data = kmalloc(sizeof(*data), GFP_NOFS);
3422 data->timestamp = jiffies;
3423 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3424 &nfs4_renew_ops, data);
3427 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3429 struct rpc_message msg = {
3430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3434 unsigned long now = jiffies;
3437 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3440 do_renew_lease(clp, now);
3444 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3446 return (server->caps & NFS_CAP_ACLS)
3447 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3448 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3451 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3452 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3455 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3457 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3458 struct page **pages, unsigned int *pgbase)
3460 struct page *newpage, **spages;
3466 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3467 newpage = alloc_page(GFP_KERNEL);
3469 if (newpage == NULL)
3471 memcpy(page_address(newpage), buf, len);
3476 } while (buflen != 0);
3482 __free_page(spages[rc-1]);
3486 struct nfs4_cached_acl {
3492 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3494 struct nfs_inode *nfsi = NFS_I(inode);
3496 spin_lock(&inode->i_lock);
3497 kfree(nfsi->nfs4_acl);
3498 nfsi->nfs4_acl = acl;
3499 spin_unlock(&inode->i_lock);
3502 static void nfs4_zap_acl_attr(struct inode *inode)
3504 nfs4_set_cached_acl(inode, NULL);
3507 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3509 struct nfs_inode *nfsi = NFS_I(inode);
3510 struct nfs4_cached_acl *acl;
3513 spin_lock(&inode->i_lock);
3514 acl = nfsi->nfs4_acl;
3517 if (buf == NULL) /* user is just asking for length */
3519 if (acl->cached == 0)
3521 ret = -ERANGE; /* see getxattr(2) man page */
3522 if (acl->len > buflen)
3524 memcpy(buf, acl->data, acl->len);
3528 spin_unlock(&inode->i_lock);
3532 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3534 struct nfs4_cached_acl *acl;
3536 if (pages && acl_len <= PAGE_SIZE) {
3537 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3541 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3543 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3550 nfs4_set_cached_acl(inode, acl);
3554 * The getxattr API returns the required buffer length when called with a
3555 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3556 * the required buf. On a NULL buf, we send a page of data to the server
3557 * guessing that the ACL request can be serviced by a page. If so, we cache
3558 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3559 * the cache. If not so, we throw away the page, and cache the required
3560 * length. The next getxattr call will then produce another round trip to
3561 * the server, this time with the input buf of the required size.
3563 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3565 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3566 struct nfs_getaclargs args = {
3567 .fh = NFS_FH(inode),
3571 struct nfs_getaclres res = {
3574 struct rpc_message msg = {
3575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3579 int ret = -ENOMEM, npages, i, acl_len = 0;
3581 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3582 /* As long as we're doing a round trip to the server anyway,
3583 * let's be prepared for a page of acl data. */
3587 /* Add an extra page to handle the bitmap returned */
3590 for (i = 0; i < npages; i++) {
3591 pages[i] = alloc_page(GFP_KERNEL);
3596 /* for decoding across pages */
3597 res.acl_scratch = alloc_page(GFP_KERNEL);
3598 if (!res.acl_scratch)
3601 args.acl_len = npages * PAGE_SIZE;
3602 args.acl_pgbase = 0;
3604 /* Let decode_getfacl know not to fail if the ACL data is larger than
3605 * the page we send as a guess */
3607 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3609 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3610 __func__, buf, buflen, npages, args.acl_len);
3611 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3612 &msg, &args.seq_args, &res.seq_res, 0);
3616 acl_len = res.acl_len - res.acl_data_offset;
3617 if (acl_len > args.acl_len)
3618 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3620 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3624 if (acl_len > buflen)
3626 _copy_from_pages(buf, pages, res.acl_data_offset,
3631 for (i = 0; i < npages; i++)
3633 __free_page(pages[i]);
3634 if (res.acl_scratch)
3635 __free_page(res.acl_scratch);
3639 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3641 struct nfs4_exception exception = { };
3644 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3647 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3648 } while (exception.retry);
3652 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3654 struct nfs_server *server = NFS_SERVER(inode);
3657 if (!nfs4_server_supports_acls(server))
3659 ret = nfs_revalidate_inode(server, inode);
3662 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3663 nfs_zap_acl_cache(inode);
3664 ret = nfs4_read_cached_acl(inode, buf, buflen);
3666 /* -ENOENT is returned if there is no ACL or if there is an ACL
3667 * but no cached acl data, just the acl length */
3669 return nfs4_get_acl_uncached(inode, buf, buflen);
3672 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3674 struct nfs_server *server = NFS_SERVER(inode);
3675 struct page *pages[NFS4ACL_MAXPAGES];
3676 struct nfs_setaclargs arg = {
3677 .fh = NFS_FH(inode),
3681 struct nfs_setaclres res;
3682 struct rpc_message msg = {
3683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3689 if (!nfs4_server_supports_acls(server))
3691 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3694 nfs_inode_return_delegation(inode);
3695 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3698 * Free each page after tx, so the only ref left is
3699 * held by the network stack
3702 put_page(pages[i-1]);
3705 * Acl update can result in inode attribute update.
3706 * so mark the attribute cache invalid.
3708 spin_lock(&inode->i_lock);
3709 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3710 spin_unlock(&inode->i_lock);
3711 nfs_access_zap_cache(inode);
3712 nfs_zap_acl_cache(inode);
3716 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3718 struct nfs4_exception exception = { };
3721 err = nfs4_handle_exception(NFS_SERVER(inode),
3722 __nfs4_proc_set_acl(inode, buf, buflen),
3724 } while (exception.retry);
3729 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3731 struct nfs_client *clp = server->nfs_client;
3733 if (task->tk_status >= 0)
3735 switch(task->tk_status) {
3736 case -NFS4ERR_DELEG_REVOKED:
3737 case -NFS4ERR_ADMIN_REVOKED:
3738 case -NFS4ERR_BAD_STATEID:
3740 nfs_remove_bad_delegation(state->inode);
3741 case -NFS4ERR_OPENMODE:
3744 nfs4_schedule_stateid_recovery(server, state);
3745 goto wait_on_recovery;
3746 case -NFS4ERR_EXPIRED:
3748 nfs4_schedule_stateid_recovery(server, state);
3749 case -NFS4ERR_STALE_STATEID:
3750 case -NFS4ERR_STALE_CLIENTID:
3751 nfs4_schedule_lease_recovery(clp);
3752 goto wait_on_recovery;
3753 #if defined(CONFIG_NFS_V4_1)
3754 case -NFS4ERR_BADSESSION:
3755 case -NFS4ERR_BADSLOT:
3756 case -NFS4ERR_BAD_HIGH_SLOT:
3757 case -NFS4ERR_DEADSESSION:
3758 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3759 case -NFS4ERR_SEQ_FALSE_RETRY:
3760 case -NFS4ERR_SEQ_MISORDERED:
3761 dprintk("%s ERROR %d, Reset session\n", __func__,
3763 nfs4_schedule_session_recovery(clp->cl_session);
3764 task->tk_status = 0;
3766 #endif /* CONFIG_NFS_V4_1 */
3767 case -NFS4ERR_DELAY:
3768 nfs_inc_server_stats(server, NFSIOS_DELAY);
3769 case -NFS4ERR_GRACE:
3771 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3772 task->tk_status = 0;
3774 case -NFS4ERR_RETRY_UNCACHED_REP:
3775 case -NFS4ERR_OLD_STATEID:
3776 task->tk_status = 0;
3779 task->tk_status = nfs4_map_errors(task->tk_status);
3782 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3783 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3784 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3785 task->tk_status = 0;
3789 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3790 unsigned short port, struct rpc_cred *cred,
3791 struct nfs4_setclientid_res *res)
3793 nfs4_verifier sc_verifier;
3794 struct nfs4_setclientid setclientid = {
3795 .sc_verifier = &sc_verifier,
3797 .sc_cb_ident = clp->cl_cb_ident,
3799 struct rpc_message msg = {
3800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3801 .rpc_argp = &setclientid,
3809 p = (__be32*)sc_verifier.data;
3810 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3811 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3814 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3815 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3817 rpc_peeraddr2str(clp->cl_rpcclient,
3819 rpc_peeraddr2str(clp->cl_rpcclient,
3821 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3822 clp->cl_id_uniquifier);
3823 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3824 sizeof(setclientid.sc_netid),
3825 rpc_peeraddr2str(clp->cl_rpcclient,
3826 RPC_DISPLAY_NETID));
3827 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3828 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3829 clp->cl_ipaddr, port >> 8, port & 255);
3831 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3832 if (status != -NFS4ERR_CLID_INUSE)
3835 ++clp->cl_id_uniquifier;
3839 ssleep(clp->cl_lease_time / HZ + 1);
3844 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3845 struct nfs4_setclientid_res *arg,
3846 struct rpc_cred *cred)
3848 struct nfs_fsinfo fsinfo;
3849 struct rpc_message msg = {
3850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3852 .rpc_resp = &fsinfo,
3859 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3861 spin_lock(&clp->cl_lock);
3862 clp->cl_lease_time = fsinfo.lease_time * HZ;
3863 clp->cl_last_renewal = now;
3864 spin_unlock(&clp->cl_lock);
3869 struct nfs4_delegreturndata {
3870 struct nfs4_delegreturnargs args;
3871 struct nfs4_delegreturnres res;
3873 nfs4_stateid stateid;
3874 unsigned long timestamp;
3875 struct nfs_fattr fattr;
3879 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3881 struct nfs4_delegreturndata *data = calldata;
3883 if (!nfs4_sequence_done(task, &data->res.seq_res))
3886 switch (task->tk_status) {
3887 case -NFS4ERR_STALE_STATEID:
3888 case -NFS4ERR_EXPIRED:
3890 renew_lease(data->res.server, data->timestamp);
3893 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3895 rpc_restart_call_prepare(task);
3899 data->rpc_status = task->tk_status;
3902 static void nfs4_delegreturn_release(void *calldata)
3907 #if defined(CONFIG_NFS_V4_1)
3908 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3910 struct nfs4_delegreturndata *d_data;
3912 d_data = (struct nfs4_delegreturndata *)data;
3914 if (nfs4_setup_sequence(d_data->res.server,
3915 &d_data->args.seq_args,
3916 &d_data->res.seq_res, 1, task))
3918 rpc_call_start(task);
3920 #endif /* CONFIG_NFS_V4_1 */
3922 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3923 #if defined(CONFIG_NFS_V4_1)
3924 .rpc_call_prepare = nfs4_delegreturn_prepare,
3925 #endif /* CONFIG_NFS_V4_1 */
3926 .rpc_call_done = nfs4_delegreturn_done,
3927 .rpc_release = nfs4_delegreturn_release,
3930 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3932 struct nfs4_delegreturndata *data;
3933 struct nfs_server *server = NFS_SERVER(inode);
3934 struct rpc_task *task;
3935 struct rpc_message msg = {
3936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3939 struct rpc_task_setup task_setup_data = {
3940 .rpc_client = server->client,
3941 .rpc_message = &msg,
3942 .callback_ops = &nfs4_delegreturn_ops,
3943 .flags = RPC_TASK_ASYNC,
3947 data = kzalloc(sizeof(*data), GFP_NOFS);
3950 data->args.fhandle = &data->fh;
3951 data->args.stateid = &data->stateid;
3952 data->args.bitmask = server->attr_bitmask;
3953 nfs_copy_fh(&data->fh, NFS_FH(inode));
3954 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3955 data->res.fattr = &data->fattr;
3956 data->res.server = server;
3957 nfs_fattr_init(data->res.fattr);
3958 data->timestamp = jiffies;
3959 data->rpc_status = 0;
3961 task_setup_data.callback_data = data;
3962 msg.rpc_argp = &data->args;
3963 msg.rpc_resp = &data->res;
3964 task = rpc_run_task(&task_setup_data);
3966 return PTR_ERR(task);
3969 status = nfs4_wait_for_completion_rpc_task(task);
3972 status = data->rpc_status;
3975 nfs_refresh_inode(inode, &data->fattr);
3981 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3983 struct nfs_server *server = NFS_SERVER(inode);
3984 struct nfs4_exception exception = { };
3987 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3989 case -NFS4ERR_STALE_STATEID:
3990 case -NFS4ERR_EXPIRED:
3994 err = nfs4_handle_exception(server, err, &exception);
3995 } while (exception.retry);
3999 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4000 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4003 * sleep, with exponential backoff, and retry the LOCK operation.
4005 static unsigned long
4006 nfs4_set_lock_task_retry(unsigned long timeout)
4008 schedule_timeout_killable(timeout);
4010 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4011 return NFS4_LOCK_MAXTIMEOUT;
4015 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4017 struct inode *inode = state->inode;
4018 struct nfs_server *server = NFS_SERVER(inode);
4019 struct nfs_client *clp = server->nfs_client;
4020 struct nfs_lockt_args arg = {
4021 .fh = NFS_FH(inode),
4024 struct nfs_lockt_res res = {
4027 struct rpc_message msg = {
4028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4031 .rpc_cred = state->owner->so_cred,
4033 struct nfs4_lock_state *lsp;
4036 arg.lock_owner.clientid = clp->cl_clientid;
4037 status = nfs4_set_lock_state(state, request);
4040 lsp = request->fl_u.nfs4_fl.owner;
4041 arg.lock_owner.id = lsp->ls_id.id;
4042 arg.lock_owner.s_dev = server->s_dev;
4043 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4046 request->fl_type = F_UNLCK;
4048 case -NFS4ERR_DENIED:
4051 request->fl_ops->fl_release_private(request);
4056 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4058 struct nfs4_exception exception = { };
4062 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4063 _nfs4_proc_getlk(state, cmd, request),
4065 } while (exception.retry);
4069 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4072 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4074 res = posix_lock_file_wait(file, fl);
4077 res = flock_lock_file_wait(file, fl);
4085 struct nfs4_unlockdata {
4086 struct nfs_locku_args arg;
4087 struct nfs_locku_res res;
4088 struct nfs4_lock_state *lsp;
4089 struct nfs_open_context *ctx;
4090 struct file_lock fl;
4091 const struct nfs_server *server;
4092 unsigned long timestamp;
4095 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4096 struct nfs_open_context *ctx,
4097 struct nfs4_lock_state *lsp,
4098 struct nfs_seqid *seqid)
4100 struct nfs4_unlockdata *p;
4101 struct inode *inode = lsp->ls_state->inode;
4103 p = kzalloc(sizeof(*p), GFP_NOFS);
4106 p->arg.fh = NFS_FH(inode);
4108 p->arg.seqid = seqid;
4109 p->res.seqid = seqid;
4110 p->arg.stateid = &lsp->ls_stateid;
4112 atomic_inc(&lsp->ls_count);
4113 /* Ensure we don't close file until we're done freeing locks! */
4114 p->ctx = get_nfs_open_context(ctx);
4115 memcpy(&p->fl, fl, sizeof(p->fl));
4116 p->server = NFS_SERVER(inode);
4120 static void nfs4_locku_release_calldata(void *data)
4122 struct nfs4_unlockdata *calldata = data;
4123 nfs_free_seqid(calldata->arg.seqid);
4124 nfs4_put_lock_state(calldata->lsp);
4125 put_nfs_open_context(calldata->ctx);
4129 static void nfs4_locku_done(struct rpc_task *task, void *data)
4131 struct nfs4_unlockdata *calldata = data;
4133 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4135 switch (task->tk_status) {
4137 memcpy(calldata->lsp->ls_stateid.data,
4138 calldata->res.stateid.data,
4139 sizeof(calldata->lsp->ls_stateid.data));
4140 renew_lease(calldata->server, calldata->timestamp);
4142 case -NFS4ERR_BAD_STATEID:
4143 case -NFS4ERR_OLD_STATEID:
4144 case -NFS4ERR_STALE_STATEID:
4145 case -NFS4ERR_EXPIRED:
4148 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4149 rpc_restart_call_prepare(task);
4153 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4155 struct nfs4_unlockdata *calldata = data;
4157 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4159 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4160 /* Note: exit _without_ running nfs4_locku_done */
4161 task->tk_action = NULL;
4164 calldata->timestamp = jiffies;
4165 if (nfs4_setup_sequence(calldata->server,
4166 &calldata->arg.seq_args,
4167 &calldata->res.seq_res, 1, task))
4169 rpc_call_start(task);
4172 static const struct rpc_call_ops nfs4_locku_ops = {
4173 .rpc_call_prepare = nfs4_locku_prepare,
4174 .rpc_call_done = nfs4_locku_done,
4175 .rpc_release = nfs4_locku_release_calldata,
4178 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4179 struct nfs_open_context *ctx,
4180 struct nfs4_lock_state *lsp,
4181 struct nfs_seqid *seqid)
4183 struct nfs4_unlockdata *data;
4184 struct rpc_message msg = {
4185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4186 .rpc_cred = ctx->cred,
4188 struct rpc_task_setup task_setup_data = {
4189 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4190 .rpc_message = &msg,
4191 .callback_ops = &nfs4_locku_ops,
4192 .workqueue = nfsiod_workqueue,
4193 .flags = RPC_TASK_ASYNC,
4196 /* Ensure this is an unlock - when canceling a lock, the
4197 * canceled lock is passed in, and it won't be an unlock.
4199 fl->fl_type = F_UNLCK;
4201 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4203 nfs_free_seqid(seqid);
4204 return ERR_PTR(-ENOMEM);
4207 msg.rpc_argp = &data->arg;
4208 msg.rpc_resp = &data->res;
4209 task_setup_data.callback_data = data;
4210 return rpc_run_task(&task_setup_data);
4213 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4215 struct nfs_inode *nfsi = NFS_I(state->inode);
4216 struct nfs_seqid *seqid;
4217 struct nfs4_lock_state *lsp;
4218 struct rpc_task *task;
4220 unsigned char fl_flags = request->fl_flags;
4222 status = nfs4_set_lock_state(state, request);
4223 /* Unlock _before_ we do the RPC call */
4224 request->fl_flags |= FL_EXISTS;
4225 down_read(&nfsi->rwsem);
4226 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4227 up_read(&nfsi->rwsem);
4230 up_read(&nfsi->rwsem);
4233 /* Is this a delegated lock? */
4234 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4236 lsp = request->fl_u.nfs4_fl.owner;
4237 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4241 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4242 status = PTR_ERR(task);
4245 status = nfs4_wait_for_completion_rpc_task(task);
4248 request->fl_flags = fl_flags;
4252 struct nfs4_lockdata {
4253 struct nfs_lock_args arg;
4254 struct nfs_lock_res res;
4255 struct nfs4_lock_state *lsp;
4256 struct nfs_open_context *ctx;
4257 struct file_lock fl;
4258 unsigned long timestamp;
4261 struct nfs_server *server;
4264 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4265 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4268 struct nfs4_lockdata *p;
4269 struct inode *inode = lsp->ls_state->inode;
4270 struct nfs_server *server = NFS_SERVER(inode);
4272 p = kzalloc(sizeof(*p), gfp_mask);
4276 p->arg.fh = NFS_FH(inode);
4278 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4279 if (p->arg.open_seqid == NULL)
4281 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4282 if (p->arg.lock_seqid == NULL)
4283 goto out_free_seqid;
4284 p->arg.lock_stateid = &lsp->ls_stateid;
4285 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4286 p->arg.lock_owner.id = lsp->ls_id.id;
4287 p->arg.lock_owner.s_dev = server->s_dev;
4288 p->res.lock_seqid = p->arg.lock_seqid;
4291 atomic_inc(&lsp->ls_count);
4292 p->ctx = get_nfs_open_context(ctx);
4293 memcpy(&p->fl, fl, sizeof(p->fl));
4296 nfs_free_seqid(p->arg.open_seqid);
4302 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4304 struct nfs4_lockdata *data = calldata;
4305 struct nfs4_state *state = data->lsp->ls_state;
4307 dprintk("%s: begin!\n", __func__);
4308 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4310 /* Do we need to do an open_to_lock_owner? */
4311 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4312 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4314 data->arg.open_stateid = &state->stateid;
4315 data->arg.new_lock_owner = 1;
4316 data->res.open_seqid = data->arg.open_seqid;
4318 data->arg.new_lock_owner = 0;
4319 data->timestamp = jiffies;
4320 if (nfs4_setup_sequence(data->server,
4321 &data->arg.seq_args,
4322 &data->res.seq_res, 1, task))
4324 rpc_call_start(task);
4325 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4328 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4330 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4331 nfs4_lock_prepare(task, calldata);
4334 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4336 struct nfs4_lockdata *data = calldata;
4338 dprintk("%s: begin!\n", __func__);
4340 if (!nfs4_sequence_done(task, &data->res.seq_res))
4343 data->rpc_status = task->tk_status;
4344 if (data->arg.new_lock_owner != 0) {
4345 if (data->rpc_status == 0)
4346 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4350 if (data->rpc_status == 0) {
4351 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4352 sizeof(data->lsp->ls_stateid.data));
4353 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4354 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4357 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4360 static void nfs4_lock_release(void *calldata)
4362 struct nfs4_lockdata *data = calldata;
4364 dprintk("%s: begin!\n", __func__);
4365 nfs_free_seqid(data->arg.open_seqid);
4366 if (data->cancelled != 0) {
4367 struct rpc_task *task;
4368 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4369 data->arg.lock_seqid);
4371 rpc_put_task_async(task);
4372 dprintk("%s: cancelling lock!\n", __func__);
4374 nfs_free_seqid(data->arg.lock_seqid);
4375 nfs4_put_lock_state(data->lsp);
4376 put_nfs_open_context(data->ctx);
4378 dprintk("%s: done!\n", __func__);
4381 static const struct rpc_call_ops nfs4_lock_ops = {
4382 .rpc_call_prepare = nfs4_lock_prepare,
4383 .rpc_call_done = nfs4_lock_done,
4384 .rpc_release = nfs4_lock_release,
4387 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4388 .rpc_call_prepare = nfs4_recover_lock_prepare,
4389 .rpc_call_done = nfs4_lock_done,
4390 .rpc_release = nfs4_lock_release,
4393 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4396 case -NFS4ERR_ADMIN_REVOKED:
4397 case -NFS4ERR_BAD_STATEID:
4398 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4399 if (new_lock_owner != 0 ||
4400 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4401 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4403 case -NFS4ERR_STALE_STATEID:
4404 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4405 case -NFS4ERR_EXPIRED:
4406 nfs4_schedule_lease_recovery(server->nfs_client);
4410 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4412 struct nfs4_lockdata *data;
4413 struct rpc_task *task;
4414 struct rpc_message msg = {
4415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4416 .rpc_cred = state->owner->so_cred,
4418 struct rpc_task_setup task_setup_data = {
4419 .rpc_client = NFS_CLIENT(state->inode),
4420 .rpc_message = &msg,
4421 .callback_ops = &nfs4_lock_ops,
4422 .workqueue = nfsiod_workqueue,
4423 .flags = RPC_TASK_ASYNC,
4427 dprintk("%s: begin!\n", __func__);
4428 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4429 fl->fl_u.nfs4_fl.owner,
4430 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4434 data->arg.block = 1;
4435 if (recovery_type > NFS_LOCK_NEW) {
4436 if (recovery_type == NFS_LOCK_RECLAIM)
4437 data->arg.reclaim = NFS_LOCK_RECLAIM;
4438 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4440 msg.rpc_argp = &data->arg;
4441 msg.rpc_resp = &data->res;
4442 task_setup_data.callback_data = data;
4443 task = rpc_run_task(&task_setup_data);
4445 return PTR_ERR(task);
4446 ret = nfs4_wait_for_completion_rpc_task(task);
4448 ret = data->rpc_status;
4450 nfs4_handle_setlk_error(data->server, data->lsp,
4451 data->arg.new_lock_owner, ret);
4453 data->cancelled = 1;
4455 dprintk("%s: done, ret = %d!\n", __func__, ret);
4459 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4461 struct nfs_server *server = NFS_SERVER(state->inode);
4462 struct nfs4_exception exception = {
4463 .inode = state->inode,
4468 /* Cache the lock if possible... */
4469 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4471 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4472 if (err != -NFS4ERR_DELAY)
4474 nfs4_handle_exception(server, err, &exception);
4475 } while (exception.retry);
4479 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4481 struct nfs_server *server = NFS_SERVER(state->inode);
4482 struct nfs4_exception exception = {
4483 .inode = state->inode,
4487 err = nfs4_set_lock_state(state, request);
4491 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4493 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4497 case -NFS4ERR_GRACE:
4498 case -NFS4ERR_DELAY:
4499 nfs4_handle_exception(server, err, &exception);
4502 } while (exception.retry);
4507 #if defined(CONFIG_NFS_V4_1)
4508 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4511 struct nfs_server *server = NFS_SERVER(state->inode);
4513 status = nfs41_test_stateid(server, state);
4514 if (status == NFS_OK)
4516 nfs41_free_stateid(server, state);
4517 return nfs4_lock_expired(state, request);
4521 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4523 struct nfs_inode *nfsi = NFS_I(state->inode);
4524 unsigned char fl_flags = request->fl_flags;
4525 int status = -ENOLCK;
4527 if ((fl_flags & FL_POSIX) &&
4528 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4530 /* Is this a delegated open? */
4531 status = nfs4_set_lock_state(state, request);
4534 request->fl_flags |= FL_ACCESS;
4535 status = do_vfs_lock(request->fl_file, request);
4538 down_read(&nfsi->rwsem);
4539 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4540 /* Yes: cache locks! */
4541 /* ...but avoid races with delegation recall... */
4542 request->fl_flags = fl_flags & ~FL_SLEEP;
4543 status = do_vfs_lock(request->fl_file, request);
4546 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4549 /* Note: we always want to sleep here! */
4550 request->fl_flags = fl_flags | FL_SLEEP;
4551 if (do_vfs_lock(request->fl_file, request) < 0)
4552 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4554 up_read(&nfsi->rwsem);
4556 request->fl_flags = fl_flags;
4560 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4562 struct nfs4_exception exception = {
4564 .inode = state->inode,
4569 err = _nfs4_proc_setlk(state, cmd, request);
4570 if (err == -NFS4ERR_DENIED)
4572 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4574 } while (exception.retry);
4579 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4581 struct nfs_open_context *ctx;
4582 struct nfs4_state *state;
4583 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4586 /* verify open state */
4587 ctx = nfs_file_open_context(filp);
4590 if (request->fl_start < 0 || request->fl_end < 0)
4593 if (IS_GETLK(cmd)) {
4595 return nfs4_proc_getlk(state, F_GETLK, request);
4599 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4602 if (request->fl_type == F_UNLCK) {
4604 return nfs4_proc_unlck(state, cmd, request);
4611 * Don't rely on the VFS having checked the file open mode,
4612 * since it won't do this for flock() locks.
4614 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4616 if (!(filp->f_mode & FMODE_READ))
4620 if (!(filp->f_mode & FMODE_WRITE))
4625 status = nfs4_proc_setlk(state, cmd, request);
4626 if ((status != -EAGAIN) || IS_SETLK(cmd))
4628 timeout = nfs4_set_lock_task_retry(timeout);
4629 status = -ERESTARTSYS;
4632 } while(status < 0);
4636 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4638 struct nfs_server *server = NFS_SERVER(state->inode);
4639 struct nfs4_exception exception = { };
4642 err = nfs4_set_lock_state(state, fl);
4646 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4649 printk(KERN_ERR "%s: unhandled error %d.\n",
4654 case -NFS4ERR_EXPIRED:
4655 nfs4_schedule_stateid_recovery(server, state);
4656 case -NFS4ERR_STALE_CLIENTID:
4657 case -NFS4ERR_STALE_STATEID:
4658 nfs4_schedule_lease_recovery(server->nfs_client);
4660 case -NFS4ERR_BADSESSION:
4661 case -NFS4ERR_BADSLOT:
4662 case -NFS4ERR_BAD_HIGH_SLOT:
4663 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4664 case -NFS4ERR_DEADSESSION:
4665 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4669 * The show must go on: exit, but mark the
4670 * stateid as needing recovery.
4672 case -NFS4ERR_DELEG_REVOKED:
4673 case -NFS4ERR_ADMIN_REVOKED:
4674 case -NFS4ERR_BAD_STATEID:
4675 case -NFS4ERR_OPENMODE:
4676 nfs4_schedule_stateid_recovery(server, state);
4681 * User RPCSEC_GSS context has expired.
4682 * We cannot recover this stateid now, so
4683 * skip it and allow recovery thread to
4689 case -NFS4ERR_DENIED:
4690 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4693 case -NFS4ERR_DELAY:
4696 err = nfs4_handle_exception(server, err, &exception);
4697 } while (exception.retry);
4702 static void nfs4_release_lockowner_release(void *calldata)
4707 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4708 .rpc_release = nfs4_release_lockowner_release,
4711 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4713 struct nfs_server *server = lsp->ls_state->owner->so_server;
4714 struct nfs_release_lockowner_args *args;
4715 struct rpc_message msg = {
4716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4719 if (server->nfs_client->cl_mvops->minor_version != 0)
4721 args = kmalloc(sizeof(*args), GFP_NOFS);
4724 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4725 args->lock_owner.id = lsp->ls_id.id;
4726 args->lock_owner.s_dev = server->s_dev;
4727 msg.rpc_argp = args;
4728 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4731 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4733 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4734 const void *buf, size_t buflen,
4735 int flags, int type)
4737 if (strcmp(key, "") != 0)
4740 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4743 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4744 void *buf, size_t buflen, int type)
4746 if (strcmp(key, "") != 0)
4749 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4752 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4753 size_t list_len, const char *name,
4754 size_t name_len, int type)
4756 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4758 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4761 if (list && len <= list_len)
4762 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4767 * nfs_fhget will use either the mounted_on_fileid or the fileid
4769 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4771 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4772 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4773 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4774 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4777 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4778 NFS_ATTR_FATTR_NLINK;
4779 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4783 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4784 struct nfs4_fs_locations *fs_locations, struct page *page)
4786 struct nfs_server *server = NFS_SERVER(dir);
4788 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4790 struct nfs4_fs_locations_arg args = {
4791 .dir_fh = NFS_FH(dir),
4796 struct nfs4_fs_locations_res res = {
4797 .fs_locations = fs_locations,
4799 struct rpc_message msg = {
4800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4806 dprintk("%s: start\n", __func__);
4808 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4809 * is not supported */
4810 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4811 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4813 bitmask[0] |= FATTR4_WORD0_FILEID;
4815 nfs_fattr_init(&fs_locations->fattr);
4816 fs_locations->server = server;
4817 fs_locations->nlocations = 0;
4818 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4819 dprintk("%s: returned status = %d\n", __func__, status);
4823 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4826 struct nfs4_secinfo_arg args = {
4827 .dir_fh = NFS_FH(dir),
4830 struct nfs4_secinfo_res res = {
4833 struct rpc_message msg = {
4834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4839 dprintk("NFS call secinfo %s\n", name->name);
4840 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4841 dprintk("NFS reply secinfo: %d\n", status);
4845 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4847 struct nfs4_exception exception = { };
4850 err = nfs4_handle_exception(NFS_SERVER(dir),
4851 _nfs4_proc_secinfo(dir, name, flavors),
4853 } while (exception.retry);
4857 #ifdef CONFIG_NFS_V4_1
4859 * Check the exchange flags returned by the server for invalid flags, having
4860 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4863 static int nfs4_check_cl_exchange_flags(u32 flags)
4865 if (flags & ~EXCHGID4_FLAG_MASK_R)
4867 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4868 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4870 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4874 return -NFS4ERR_INVAL;
4878 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4880 if (a->server_scope_sz == b->server_scope_sz &&
4881 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4888 * nfs4_proc_exchange_id()
4890 * Since the clientid has expired, all compounds using sessions
4891 * associated with the stale clientid will be returning
4892 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4893 * be in some phase of session reset.
4895 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4897 nfs4_verifier verifier;
4898 struct nfs41_exchange_id_args args = {
4900 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4902 struct nfs41_exchange_id_res res = {
4906 struct rpc_message msg = {
4907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4914 dprintk("--> %s\n", __func__);
4915 BUG_ON(clp == NULL);
4917 p = (u32 *)verifier.data;
4918 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4919 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4920 args.verifier = &verifier;
4922 args.id_len = scnprintf(args.id, sizeof(args.id),
4925 init_utsname()->nodename,
4926 init_utsname()->domainname,
4927 clp->cl_rpcclient->cl_auth->au_flavor);
4929 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4930 if (unlikely(!res.server_scope)) {
4935 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4937 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4940 if (clp->server_scope &&
4941 !nfs41_same_server_scope(clp->server_scope,
4942 res.server_scope)) {
4943 dprintk("%s: server_scope mismatch detected\n",
4945 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4946 kfree(clp->server_scope);
4947 clp->server_scope = NULL;
4950 if (!clp->server_scope) {
4951 clp->server_scope = res.server_scope;
4955 kfree(res.server_scope);
4957 dprintk("<-- %s status= %d\n", __func__, status);
4961 struct nfs4_get_lease_time_data {
4962 struct nfs4_get_lease_time_args *args;
4963 struct nfs4_get_lease_time_res *res;
4964 struct nfs_client *clp;
4967 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4971 struct nfs4_get_lease_time_data *data =
4972 (struct nfs4_get_lease_time_data *)calldata;
4974 dprintk("--> %s\n", __func__);
4975 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4976 /* just setup sequence, do not trigger session recovery
4977 since we're invoked within one */
4978 ret = nfs41_setup_sequence(data->clp->cl_session,
4979 &data->args->la_seq_args,
4980 &data->res->lr_seq_res, 0, task);
4982 BUG_ON(ret == -EAGAIN);
4983 rpc_call_start(task);
4984 dprintk("<-- %s\n", __func__);
4988 * Called from nfs4_state_manager thread for session setup, so don't recover
4989 * from sequence operation or clientid errors.
4991 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4993 struct nfs4_get_lease_time_data *data =
4994 (struct nfs4_get_lease_time_data *)calldata;
4996 dprintk("--> %s\n", __func__);
4997 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4999 switch (task->tk_status) {
5000 case -NFS4ERR_DELAY:
5001 case -NFS4ERR_GRACE:
5002 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5003 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5004 task->tk_status = 0;
5006 case -NFS4ERR_RETRY_UNCACHED_REP:
5007 rpc_restart_call_prepare(task);
5010 dprintk("<-- %s\n", __func__);
5013 struct rpc_call_ops nfs4_get_lease_time_ops = {
5014 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5015 .rpc_call_done = nfs4_get_lease_time_done,
5018 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5020 struct rpc_task *task;
5021 struct nfs4_get_lease_time_args args;
5022 struct nfs4_get_lease_time_res res = {
5023 .lr_fsinfo = fsinfo,
5025 struct nfs4_get_lease_time_data data = {
5030 struct rpc_message msg = {
5031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5035 struct rpc_task_setup task_setup = {
5036 .rpc_client = clp->cl_rpcclient,
5037 .rpc_message = &msg,
5038 .callback_ops = &nfs4_get_lease_time_ops,
5039 .callback_data = &data,
5040 .flags = RPC_TASK_TIMEOUT,
5044 dprintk("--> %s\n", __func__);
5045 task = rpc_run_task(&task_setup);
5048 status = PTR_ERR(task);
5050 status = task->tk_status;
5053 dprintk("<-- %s return %d\n", __func__, status);
5059 * Reset a slot table
5061 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5064 struct nfs4_slot *new = NULL;
5068 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5069 max_reqs, tbl->max_slots);
5071 /* Does the newly negotiated max_reqs match the existing slot table? */
5072 if (max_reqs != tbl->max_slots) {
5074 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5081 spin_lock(&tbl->slot_tbl_lock);
5084 tbl->max_slots = max_reqs;
5086 for (i = 0; i < tbl->max_slots; ++i)
5087 tbl->slots[i].seq_nr = ivalue;
5088 spin_unlock(&tbl->slot_tbl_lock);
5089 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5090 tbl, tbl->slots, tbl->max_slots);
5092 dprintk("<-- %s: return %d\n", __func__, ret);
5097 * Reset the forechannel and backchannel slot tables
5099 static int nfs4_reset_slot_tables(struct nfs4_session *session)
5103 status = nfs4_reset_slot_table(&session->fc_slot_table,
5104 session->fc_attrs.max_reqs, 1);
5108 status = nfs4_reset_slot_table(&session->bc_slot_table,
5109 session->bc_attrs.max_reqs, 0);
5113 /* Destroy the slot table */
5114 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5116 if (session->fc_slot_table.slots != NULL) {
5117 kfree(session->fc_slot_table.slots);
5118 session->fc_slot_table.slots = NULL;
5120 if (session->bc_slot_table.slots != NULL) {
5121 kfree(session->bc_slot_table.slots);
5122 session->bc_slot_table.slots = NULL;
5128 * Initialize slot table
5130 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5131 int max_slots, int ivalue)
5133 struct nfs4_slot *slot;
5136 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5138 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5140 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5145 spin_lock(&tbl->slot_tbl_lock);
5146 tbl->max_slots = max_slots;
5148 tbl->highest_used_slotid = -1; /* no slot is currently used */
5149 spin_unlock(&tbl->slot_tbl_lock);
5150 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5151 tbl, tbl->slots, tbl->max_slots);
5153 dprintk("<-- %s: return %d\n", __func__, ret);
5158 * Initialize the forechannel and backchannel tables
5160 static int nfs4_init_slot_tables(struct nfs4_session *session)
5162 struct nfs4_slot_table *tbl;
5165 tbl = &session->fc_slot_table;
5166 if (tbl->slots == NULL) {
5167 status = nfs4_init_slot_table(tbl,
5168 session->fc_attrs.max_reqs, 1);
5173 tbl = &session->bc_slot_table;
5174 if (tbl->slots == NULL) {
5175 status = nfs4_init_slot_table(tbl,
5176 session->bc_attrs.max_reqs, 0);
5178 nfs4_destroy_slot_tables(session);
5184 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5186 struct nfs4_session *session;
5187 struct nfs4_slot_table *tbl;
5189 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5193 tbl = &session->fc_slot_table;
5194 tbl->highest_used_slotid = -1;
5195 spin_lock_init(&tbl->slot_tbl_lock);
5196 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5197 init_completion(&tbl->complete);
5199 tbl = &session->bc_slot_table;
5200 tbl->highest_used_slotid = -1;
5201 spin_lock_init(&tbl->slot_tbl_lock);
5202 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5203 init_completion(&tbl->complete);
5205 session->session_state = 1<<NFS4_SESSION_INITING;
5211 void nfs4_destroy_session(struct nfs4_session *session)
5213 nfs4_proc_destroy_session(session);
5214 dprintk("%s Destroy backchannel for xprt %p\n",
5215 __func__, session->clp->cl_rpcclient->cl_xprt);
5216 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5217 NFS41_BC_MIN_CALLBACKS);
5218 nfs4_destroy_slot_tables(session);
5223 * Initialize the values to be used by the client in CREATE_SESSION
5224 * If nfs4_init_session set the fore channel request and response sizes,
5227 * Set the back channel max_resp_sz_cached to zero to force the client to
5228 * always set csa_cachethis to FALSE because the current implementation
5229 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5231 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5233 struct nfs4_session *session = args->client->cl_session;
5234 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5235 mxresp_sz = session->fc_attrs.max_resp_sz;
5238 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5240 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5241 /* Fore channel attributes */
5242 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5243 args->fc_attrs.max_resp_sz = mxresp_sz;
5244 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5245 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5247 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5248 "max_ops=%u max_reqs=%u\n",
5250 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5251 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5253 /* Back channel attributes */
5254 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5255 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5256 args->bc_attrs.max_resp_sz_cached = 0;
5257 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5258 args->bc_attrs.max_reqs = 1;
5260 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5261 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5263 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5264 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5265 args->bc_attrs.max_reqs);
5268 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5270 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5271 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5273 if (rcvd->max_resp_sz > sent->max_resp_sz)
5276 * Our requested max_ops is the minimum we need; we're not
5277 * prepared to break up compounds into smaller pieces than that.
5278 * So, no point even trying to continue if the server won't
5281 if (rcvd->max_ops < sent->max_ops)
5283 if (rcvd->max_reqs == 0)
5288 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5290 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5291 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5293 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5295 if (rcvd->max_resp_sz < sent->max_resp_sz)
5297 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5299 /* These would render the backchannel useless: */
5300 if (rcvd->max_ops == 0)
5302 if (rcvd->max_reqs == 0)
5307 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5308 struct nfs4_session *session)
5312 ret = nfs4_verify_fore_channel_attrs(args, session);
5315 return nfs4_verify_back_channel_attrs(args, session);
5318 static int _nfs4_proc_create_session(struct nfs_client *clp)
5320 struct nfs4_session *session = clp->cl_session;
5321 struct nfs41_create_session_args args = {
5323 .cb_program = NFS4_CALLBACK,
5325 struct nfs41_create_session_res res = {
5328 struct rpc_message msg = {
5329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5335 nfs4_init_channel_attrs(&args);
5336 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5338 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5341 /* Verify the session's negotiated channel_attrs values */
5342 status = nfs4_verify_channel_attrs(&args, session);
5344 /* Increment the clientid slot sequence id */
5352 * Issues a CREATE_SESSION operation to the server.
5353 * It is the responsibility of the caller to verify the session is
5354 * expired before calling this routine.
5356 int nfs4_proc_create_session(struct nfs_client *clp)
5360 struct nfs4_session *session = clp->cl_session;
5362 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5364 status = _nfs4_proc_create_session(clp);
5368 /* Init and reset the fore channel */
5369 status = nfs4_init_slot_tables(session);
5370 dprintk("slot table initialization returned %d\n", status);
5373 status = nfs4_reset_slot_tables(session);
5374 dprintk("slot table reset returned %d\n", status);
5378 ptr = (unsigned *)&session->sess_id.data[0];
5379 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5380 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5382 dprintk("<-- %s\n", __func__);
5387 * Issue the over-the-wire RPC DESTROY_SESSION.
5388 * The caller must serialize access to this routine.
5390 int nfs4_proc_destroy_session(struct nfs4_session *session)
5393 struct rpc_message msg;
5395 dprintk("--> nfs4_proc_destroy_session\n");
5397 /* session is still being setup */
5398 if (session->clp->cl_cons_state != NFS_CS_READY)
5401 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5402 msg.rpc_argp = session;
5403 msg.rpc_resp = NULL;
5404 msg.rpc_cred = NULL;
5405 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5409 "Got error %d from the server on DESTROY_SESSION. "
5410 "Session has been destroyed regardless...\n", status);
5412 dprintk("<-- nfs4_proc_destroy_session\n");
5416 int nfs4_init_session(struct nfs_server *server)
5418 struct nfs_client *clp = server->nfs_client;
5419 struct nfs4_session *session;
5420 unsigned int rsize, wsize;
5423 if (!nfs4_has_session(clp))
5426 session = clp->cl_session;
5427 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5430 rsize = server->rsize;
5432 rsize = NFS_MAX_FILE_IO_SIZE;
5433 wsize = server->wsize;
5435 wsize = NFS_MAX_FILE_IO_SIZE;
5437 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5438 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5440 ret = nfs4_recover_expired_lease(server);
5442 ret = nfs4_check_client_ready(clp);
5446 int nfs4_init_ds_session(struct nfs_client *clp)
5448 struct nfs4_session *session = clp->cl_session;
5451 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5454 ret = nfs4_client_recover_expired_lease(clp);
5456 /* Test for the DS role */
5457 if (!is_ds_client(clp))
5460 ret = nfs4_check_client_ready(clp);
5464 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5468 * Renew the cl_session lease.
5470 struct nfs4_sequence_data {
5471 struct nfs_client *clp;
5472 struct nfs4_sequence_args args;
5473 struct nfs4_sequence_res res;
5476 static void nfs41_sequence_release(void *data)
5478 struct nfs4_sequence_data *calldata = data;
5479 struct nfs_client *clp = calldata->clp;
5481 if (atomic_read(&clp->cl_count) > 1)
5482 nfs4_schedule_state_renewal(clp);
5483 nfs_put_client(clp);
5487 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5489 switch(task->tk_status) {
5490 case -NFS4ERR_DELAY:
5491 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5494 nfs4_schedule_lease_recovery(clp);
5499 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5501 struct nfs4_sequence_data *calldata = data;
5502 struct nfs_client *clp = calldata->clp;
5504 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5507 if (task->tk_status < 0) {
5508 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5509 if (atomic_read(&clp->cl_count) == 1)
5512 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5513 rpc_restart_call_prepare(task);
5517 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5519 dprintk("<-- %s\n", __func__);
5522 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5524 struct nfs4_sequence_data *calldata = data;
5525 struct nfs_client *clp = calldata->clp;
5526 struct nfs4_sequence_args *args;
5527 struct nfs4_sequence_res *res;
5529 args = task->tk_msg.rpc_argp;
5530 res = task->tk_msg.rpc_resp;
5532 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5534 rpc_call_start(task);
5537 static const struct rpc_call_ops nfs41_sequence_ops = {
5538 .rpc_call_done = nfs41_sequence_call_done,
5539 .rpc_call_prepare = nfs41_sequence_prepare,
5540 .rpc_release = nfs41_sequence_release,
5543 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5545 struct nfs4_sequence_data *calldata;
5546 struct rpc_message msg = {
5547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5550 struct rpc_task_setup task_setup_data = {
5551 .rpc_client = clp->cl_rpcclient,
5552 .rpc_message = &msg,
5553 .callback_ops = &nfs41_sequence_ops,
5554 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5557 if (!atomic_inc_not_zero(&clp->cl_count))
5558 return ERR_PTR(-EIO);
5559 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5560 if (calldata == NULL) {
5561 nfs_put_client(clp);
5562 return ERR_PTR(-ENOMEM);
5564 msg.rpc_argp = &calldata->args;
5565 msg.rpc_resp = &calldata->res;
5566 calldata->clp = clp;
5567 task_setup_data.callback_data = calldata;
5569 return rpc_run_task(&task_setup_data);
5572 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5574 struct rpc_task *task;
5577 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5579 task = _nfs41_proc_sequence(clp, cred);
5581 ret = PTR_ERR(task);
5583 rpc_put_task_async(task);
5584 dprintk("<-- %s status=%d\n", __func__, ret);
5588 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5590 struct rpc_task *task;
5593 task = _nfs41_proc_sequence(clp, cred);
5595 ret = PTR_ERR(task);
5598 ret = rpc_wait_for_completion_task(task);
5600 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5602 if (task->tk_status == 0)
5603 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5604 ret = task->tk_status;
5608 dprintk("<-- %s status=%d\n", __func__, ret);
5612 struct nfs4_reclaim_complete_data {
5613 struct nfs_client *clp;
5614 struct nfs41_reclaim_complete_args arg;
5615 struct nfs41_reclaim_complete_res res;
5618 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5620 struct nfs4_reclaim_complete_data *calldata = data;
5622 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5623 if (nfs41_setup_sequence(calldata->clp->cl_session,
5624 &calldata->arg.seq_args,
5625 &calldata->res.seq_res, 0, task))
5628 rpc_call_start(task);
5631 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5633 switch(task->tk_status) {
5635 case -NFS4ERR_COMPLETE_ALREADY:
5636 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5638 case -NFS4ERR_DELAY:
5639 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5641 case -NFS4ERR_RETRY_UNCACHED_REP:
5644 nfs4_schedule_lease_recovery(clp);
5649 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5651 struct nfs4_reclaim_complete_data *calldata = data;
5652 struct nfs_client *clp = calldata->clp;
5653 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5655 dprintk("--> %s\n", __func__);
5656 if (!nfs41_sequence_done(task, res))
5659 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5660 rpc_restart_call_prepare(task);
5663 dprintk("<-- %s\n", __func__);
5666 static void nfs4_free_reclaim_complete_data(void *data)
5668 struct nfs4_reclaim_complete_data *calldata = data;
5673 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5674 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5675 .rpc_call_done = nfs4_reclaim_complete_done,
5676 .rpc_release = nfs4_free_reclaim_complete_data,
5680 * Issue a global reclaim complete.
5682 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5684 struct nfs4_reclaim_complete_data *calldata;
5685 struct rpc_task *task;
5686 struct rpc_message msg = {
5687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5689 struct rpc_task_setup task_setup_data = {
5690 .rpc_client = clp->cl_rpcclient,
5691 .rpc_message = &msg,
5692 .callback_ops = &nfs4_reclaim_complete_call_ops,
5693 .flags = RPC_TASK_ASYNC,
5695 int status = -ENOMEM;
5697 dprintk("--> %s\n", __func__);
5698 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5699 if (calldata == NULL)
5701 calldata->clp = clp;
5702 calldata->arg.one_fs = 0;
5704 msg.rpc_argp = &calldata->arg;
5705 msg.rpc_resp = &calldata->res;
5706 task_setup_data.callback_data = calldata;
5707 task = rpc_run_task(&task_setup_data);
5709 status = PTR_ERR(task);
5712 status = nfs4_wait_for_completion_rpc_task(task);
5714 status = task->tk_status;
5718 dprintk("<-- %s status=%d\n", __func__, status);
5723 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5725 struct nfs4_layoutget *lgp = calldata;
5726 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5728 dprintk("--> %s\n", __func__);
5729 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5730 * right now covering the LAYOUTGET we are about to send.
5731 * However, that is not so catastrophic, and there seems
5732 * to be no way to prevent it completely.
5734 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5735 &lgp->res.seq_res, 0, task))
5737 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5738 NFS_I(lgp->args.inode)->layout,
5739 lgp->args.ctx->state)) {
5740 rpc_exit(task, NFS4_OK);
5743 rpc_call_start(task);
5746 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5748 struct nfs4_layoutget *lgp = calldata;
5749 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5751 dprintk("--> %s\n", __func__);
5753 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5756 switch (task->tk_status) {
5759 case -NFS4ERR_LAYOUTTRYLATER:
5760 case -NFS4ERR_RECALLCONFLICT:
5761 task->tk_status = -NFS4ERR_DELAY;
5764 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5765 rpc_restart_call_prepare(task);
5769 dprintk("<-- %s\n", __func__);
5772 static void nfs4_layoutget_release(void *calldata)
5774 struct nfs4_layoutget *lgp = calldata;
5776 dprintk("--> %s\n", __func__);
5777 put_nfs_open_context(lgp->args.ctx);
5779 dprintk("<-- %s\n", __func__);
5782 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5783 .rpc_call_prepare = nfs4_layoutget_prepare,
5784 .rpc_call_done = nfs4_layoutget_done,
5785 .rpc_release = nfs4_layoutget_release,
5788 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5790 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5791 struct rpc_task *task;
5792 struct rpc_message msg = {
5793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5794 .rpc_argp = &lgp->args,
5795 .rpc_resp = &lgp->res,
5797 struct rpc_task_setup task_setup_data = {
5798 .rpc_client = server->client,
5799 .rpc_message = &msg,
5800 .callback_ops = &nfs4_layoutget_call_ops,
5801 .callback_data = lgp,
5802 .flags = RPC_TASK_ASYNC,
5806 dprintk("--> %s\n", __func__);
5808 lgp->res.layoutp = &lgp->args.layout;
5809 lgp->res.seq_res.sr_slot = NULL;
5810 task = rpc_run_task(&task_setup_data);
5812 return PTR_ERR(task);
5813 status = nfs4_wait_for_completion_rpc_task(task);
5815 status = task->tk_status;
5817 status = pnfs_layout_process(lgp);
5819 dprintk("<-- %s status=%d\n", __func__, status);
5824 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5826 struct nfs4_layoutreturn *lrp = calldata;
5828 dprintk("--> %s\n", __func__);
5829 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5830 &lrp->res.seq_res, 0, task))
5832 rpc_call_start(task);
5835 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5837 struct nfs4_layoutreturn *lrp = calldata;
5838 struct nfs_server *server;
5839 struct pnfs_layout_hdr *lo = lrp->args.layout;
5841 dprintk("--> %s\n", __func__);
5843 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5846 server = NFS_SERVER(lrp->args.inode);
5847 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5848 rpc_restart_call_prepare(task);
5851 spin_lock(&lo->plh_inode->i_lock);
5852 if (task->tk_status == 0) {
5853 if (lrp->res.lrs_present) {
5854 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5856 BUG_ON(!list_empty(&lo->plh_segs));
5858 lo->plh_block_lgets--;
5859 spin_unlock(&lo->plh_inode->i_lock);
5860 dprintk("<-- %s\n", __func__);
5863 static void nfs4_layoutreturn_release(void *calldata)
5865 struct nfs4_layoutreturn *lrp = calldata;
5867 dprintk("--> %s\n", __func__);
5868 put_layout_hdr(lrp->args.layout);
5870 dprintk("<-- %s\n", __func__);
5873 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5874 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5875 .rpc_call_done = nfs4_layoutreturn_done,
5876 .rpc_release = nfs4_layoutreturn_release,
5879 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5881 struct rpc_task *task;
5882 struct rpc_message msg = {
5883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5884 .rpc_argp = &lrp->args,
5885 .rpc_resp = &lrp->res,
5887 struct rpc_task_setup task_setup_data = {
5888 .rpc_client = lrp->clp->cl_rpcclient,
5889 .rpc_message = &msg,
5890 .callback_ops = &nfs4_layoutreturn_call_ops,
5891 .callback_data = lrp,
5895 dprintk("--> %s\n", __func__);
5896 task = rpc_run_task(&task_setup_data);
5898 return PTR_ERR(task);
5899 status = task->tk_status;
5900 dprintk("<-- %s status=%d\n", __func__, status);
5906 * Retrieve the list of Data Server devices from the MDS.
5908 static int _nfs4_getdevicelist(struct nfs_server *server,
5909 const struct nfs_fh *fh,
5910 struct pnfs_devicelist *devlist)
5912 struct nfs4_getdevicelist_args args = {
5914 .layoutclass = server->pnfs_curr_ld->id,
5916 struct nfs4_getdevicelist_res res = {
5919 struct rpc_message msg = {
5920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5926 dprintk("--> %s\n", __func__);
5927 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5929 dprintk("<-- %s status=%d\n", __func__, status);
5933 int nfs4_proc_getdevicelist(struct nfs_server *server,
5934 const struct nfs_fh *fh,
5935 struct pnfs_devicelist *devlist)
5937 struct nfs4_exception exception = { };
5941 err = nfs4_handle_exception(server,
5942 _nfs4_getdevicelist(server, fh, devlist),
5944 } while (exception.retry);
5946 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5947 err, devlist->num_devs);
5951 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5954 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5956 struct nfs4_getdeviceinfo_args args = {
5959 struct nfs4_getdeviceinfo_res res = {
5962 struct rpc_message msg = {
5963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5969 dprintk("--> %s\n", __func__);
5970 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5971 dprintk("<-- %s status=%d\n", __func__, status);
5976 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5978 struct nfs4_exception exception = { };
5982 err = nfs4_handle_exception(server,
5983 _nfs4_proc_getdeviceinfo(server, pdev),
5985 } while (exception.retry);
5988 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5990 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5992 struct nfs4_layoutcommit_data *data = calldata;
5993 struct nfs_server *server = NFS_SERVER(data->args.inode);
5995 if (nfs4_setup_sequence(server, &data->args.seq_args,
5996 &data->res.seq_res, 1, task))
5998 rpc_call_start(task);
6002 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6004 struct nfs4_layoutcommit_data *data = calldata;
6005 struct nfs_server *server = NFS_SERVER(data->args.inode);
6007 if (!nfs4_sequence_done(task, &data->res.seq_res))
6010 switch (task->tk_status) { /* Just ignore these failures */
6011 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6012 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6013 case -NFS4ERR_BADLAYOUT: /* no layout */
6014 case -NFS4ERR_GRACE: /* loca_recalim always false */
6015 task->tk_status = 0;
6018 nfs_post_op_update_inode_force_wcc(data->args.inode,
6022 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6023 rpc_restart_call_prepare(task);
6029 static void nfs4_layoutcommit_release(void *calldata)
6031 struct nfs4_layoutcommit_data *data = calldata;
6032 struct pnfs_layout_segment *lseg, *tmp;
6033 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6035 pnfs_cleanup_layoutcommit(data);
6036 /* Matched by references in pnfs_set_layoutcommit */
6037 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6038 list_del_init(&lseg->pls_lc_list);
6039 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6044 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6045 smp_mb__after_clear_bit();
6046 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6048 put_rpccred(data->cred);
6052 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6053 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6054 .rpc_call_done = nfs4_layoutcommit_done,
6055 .rpc_release = nfs4_layoutcommit_release,
6059 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6061 struct rpc_message msg = {
6062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6063 .rpc_argp = &data->args,
6064 .rpc_resp = &data->res,
6065 .rpc_cred = data->cred,
6067 struct rpc_task_setup task_setup_data = {
6068 .task = &data->task,
6069 .rpc_client = NFS_CLIENT(data->args.inode),
6070 .rpc_message = &msg,
6071 .callback_ops = &nfs4_layoutcommit_ops,
6072 .callback_data = data,
6073 .flags = RPC_TASK_ASYNC,
6075 struct rpc_task *task;
6078 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6079 "lbw: %llu inode %lu\n",
6080 data->task.tk_pid, sync,
6081 data->args.lastbytewritten,
6082 data->args.inode->i_ino);
6084 task = rpc_run_task(&task_setup_data);
6086 return PTR_ERR(task);
6089 status = nfs4_wait_for_completion_rpc_task(task);
6092 status = task->tk_status;
6094 dprintk("%s: status %d\n", __func__, status);
6100 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6101 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6103 struct nfs41_secinfo_no_name_args args = {
6104 .style = SECINFO_STYLE_CURRENT_FH,
6106 struct nfs4_secinfo_res res = {
6109 struct rpc_message msg = {
6110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6114 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6118 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6119 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6121 struct nfs4_exception exception = { };
6124 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6127 case -NFS4ERR_WRONGSEC:
6128 case -NFS4ERR_NOTSUPP:
6131 err = nfs4_handle_exception(server, err, &exception);
6133 } while (exception.retry);
6139 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6140 struct nfs_fsinfo *info)
6144 rpc_authflavor_t flavor;
6145 struct nfs4_secinfo_flavors *flavors;
6147 page = alloc_page(GFP_KERNEL);
6153 flavors = page_address(page);
6154 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6157 * Fall back on "guess and check" method if
6158 * the server doesn't support SECINFO_NO_NAME
6160 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6161 err = nfs4_find_root_sec(server, fhandle, info);
6167 flavor = nfs_find_best_sec(flavors);
6169 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6178 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6181 struct nfs41_test_stateid_args args = {
6182 .stateid = &state->stateid,
6184 struct nfs41_test_stateid_res res;
6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6190 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6191 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6195 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6197 struct nfs4_exception exception = { };
6200 err = nfs4_handle_exception(server,
6201 _nfs41_test_stateid(server, state),
6203 } while (exception.retry);
6207 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6210 struct nfs41_free_stateid_args args = {
6211 .stateid = &state->stateid,
6213 struct nfs41_free_stateid_res res;
6214 struct rpc_message msg = {
6215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6220 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6221 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6225 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6227 struct nfs4_exception exception = { };
6230 err = nfs4_handle_exception(server,
6231 _nfs4_free_stateid(server, state),
6233 } while (exception.retry);
6236 #endif /* CONFIG_NFS_V4_1 */
6238 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6239 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6240 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6241 .recover_open = nfs4_open_reclaim,
6242 .recover_lock = nfs4_lock_reclaim,
6243 .establish_clid = nfs4_init_clientid,
6244 .get_clid_cred = nfs4_get_setclientid_cred,
6247 #if defined(CONFIG_NFS_V4_1)
6248 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6249 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6250 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6251 .recover_open = nfs4_open_reclaim,
6252 .recover_lock = nfs4_lock_reclaim,
6253 .establish_clid = nfs41_init_clientid,
6254 .get_clid_cred = nfs4_get_exchange_id_cred,
6255 .reclaim_complete = nfs41_proc_reclaim_complete,
6257 #endif /* CONFIG_NFS_V4_1 */
6259 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6260 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6261 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6262 .recover_open = nfs4_open_expired,
6263 .recover_lock = nfs4_lock_expired,
6264 .establish_clid = nfs4_init_clientid,
6265 .get_clid_cred = nfs4_get_setclientid_cred,
6268 #if defined(CONFIG_NFS_V4_1)
6269 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6270 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6271 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6272 .recover_open = nfs41_open_expired,
6273 .recover_lock = nfs41_lock_expired,
6274 .establish_clid = nfs41_init_clientid,
6275 .get_clid_cred = nfs4_get_exchange_id_cred,
6277 #endif /* CONFIG_NFS_V4_1 */
6279 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6280 .sched_state_renewal = nfs4_proc_async_renew,
6281 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6282 .renew_lease = nfs4_proc_renew,
6285 #if defined(CONFIG_NFS_V4_1)
6286 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6287 .sched_state_renewal = nfs41_proc_async_sequence,
6288 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6289 .renew_lease = nfs4_proc_sequence,
6293 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6295 .call_sync = _nfs4_call_sync,
6296 .validate_stateid = nfs4_validate_delegation_stateid,
6297 .find_root_sec = nfs4_find_root_sec,
6298 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6299 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6300 .state_renewal_ops = &nfs40_state_renewal_ops,
6303 #if defined(CONFIG_NFS_V4_1)
6304 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6306 .call_sync = _nfs4_call_sync_session,
6307 .validate_stateid = nfs41_validate_delegation_stateid,
6308 .find_root_sec = nfs41_find_root_sec,
6309 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6310 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6311 .state_renewal_ops = &nfs41_state_renewal_ops,
6315 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6316 [0] = &nfs_v4_0_minor_ops,
6317 #if defined(CONFIG_NFS_V4_1)
6318 [1] = &nfs_v4_1_minor_ops,
6322 static const struct inode_operations nfs4_file_inode_operations = {
6323 .permission = nfs_permission,
6324 .getattr = nfs_getattr,
6325 .setattr = nfs_setattr,
6326 .getxattr = generic_getxattr,
6327 .setxattr = generic_setxattr,
6328 .listxattr = generic_listxattr,
6329 .removexattr = generic_removexattr,
6332 const struct nfs_rpc_ops nfs_v4_clientops = {
6333 .version = 4, /* protocol version */
6334 .dentry_ops = &nfs4_dentry_operations,
6335 .dir_inode_ops = &nfs4_dir_inode_operations,
6336 .file_inode_ops = &nfs4_file_inode_operations,
6337 .file_ops = &nfs4_file_operations,
6338 .getroot = nfs4_proc_get_root,
6339 .getattr = nfs4_proc_getattr,
6340 .setattr = nfs4_proc_setattr,
6341 .lookup = nfs4_proc_lookup,
6342 .access = nfs4_proc_access,
6343 .readlink = nfs4_proc_readlink,
6344 .create = nfs4_proc_create,
6345 .remove = nfs4_proc_remove,
6346 .unlink_setup = nfs4_proc_unlink_setup,
6347 .unlink_done = nfs4_proc_unlink_done,
6348 .rename = nfs4_proc_rename,
6349 .rename_setup = nfs4_proc_rename_setup,
6350 .rename_done = nfs4_proc_rename_done,
6351 .link = nfs4_proc_link,
6352 .symlink = nfs4_proc_symlink,
6353 .mkdir = nfs4_proc_mkdir,
6354 .rmdir = nfs4_proc_remove,
6355 .readdir = nfs4_proc_readdir,
6356 .mknod = nfs4_proc_mknod,
6357 .statfs = nfs4_proc_statfs,
6358 .fsinfo = nfs4_proc_fsinfo,
6359 .pathconf = nfs4_proc_pathconf,
6360 .set_capabilities = nfs4_server_capabilities,
6361 .decode_dirent = nfs4_decode_dirent,
6362 .read_setup = nfs4_proc_read_setup,
6363 .read_done = nfs4_read_done,
6364 .write_setup = nfs4_proc_write_setup,
6365 .write_done = nfs4_write_done,
6366 .commit_setup = nfs4_proc_commit_setup,
6367 .commit_done = nfs4_commit_done,
6368 .lock = nfs4_proc_lock,
6369 .clear_acl_cache = nfs4_zap_acl_attr,
6370 .close_context = nfs4_close_context,
6371 .open_context = nfs4_atomic_open,
6372 .init_client = nfs4_init_client,
6373 .secinfo = nfs4_proc_secinfo,
6376 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6377 .prefix = XATTR_NAME_NFSV4_ACL,
6378 .list = nfs4_xattr_list_nfs4_acl,
6379 .get = nfs4_xattr_get_nfs4_acl,
6380 .set = nfs4_xattr_set_nfs4_acl,
6383 const struct xattr_handler *nfs4_xattr_handlers[] = {
6384 &nfs4_xattr_nfs4_acl_handler,