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 goto wait_on_recovery;
307 #endif /* defined(CONFIG_NFS_V4_1) */
308 case -NFS4ERR_FILE_OPEN:
309 if (exception->timeout > HZ) {
310 /* We have retried a decent amount, time to
319 ret = nfs4_delay(server->client, &exception->timeout);
322 case -NFS4ERR_RETRY_UNCACHED_REP:
323 case -NFS4ERR_OLD_STATEID:
324 exception->retry = 1;
326 case -NFS4ERR_BADOWNER:
327 /* The following works around a Linux server bug! */
328 case -NFS4ERR_BADNAME:
329 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
330 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
331 exception->retry = 1;
332 printk(KERN_WARNING "NFS: v4 server %s "
333 "does not accept raw "
335 "Reenabling the idmapper.\n",
336 server->nfs_client->cl_hostname);
339 /* We failed to handle the error */
340 return nfs4_map_errors(ret);
342 ret = nfs4_wait_clnt_recover(clp);
344 exception->retry = 1;
349 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
351 spin_lock(&clp->cl_lock);
352 if (time_before(clp->cl_last_renewal,timestamp))
353 clp->cl_last_renewal = timestamp;
354 spin_unlock(&clp->cl_lock);
357 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
359 do_renew_lease(server->nfs_client, timestamp);
362 #if defined(CONFIG_NFS_V4_1)
365 * nfs4_free_slot - free a slot and efficiently update slot table.
367 * freeing a slot is trivially done by clearing its respective bit
369 * If the freed slotid equals highest_used_slotid we want to update it
370 * so that the server would be able to size down the slot table if needed,
371 * otherwise we know that the highest_used_slotid is still in use.
372 * When updating highest_used_slotid there may be "holes" in the bitmap
373 * so we need to scan down from highest_used_slotid to 0 looking for the now
374 * highest slotid in use.
375 * If none found, highest_used_slotid is set to -1.
377 * Must be called while holding tbl->slot_tbl_lock
380 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
382 int free_slotid = free_slot - tbl->slots;
383 int slotid = free_slotid;
385 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
386 /* clear used bit in bitmap */
387 __clear_bit(slotid, tbl->used_slots);
389 /* update highest_used_slotid when it is freed */
390 if (slotid == tbl->highest_used_slotid) {
391 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
392 if (slotid < tbl->max_slots)
393 tbl->highest_used_slotid = slotid;
395 tbl->highest_used_slotid = -1;
397 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
398 free_slotid, tbl->highest_used_slotid);
402 * Signal state manager thread if session fore channel is drained
404 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
406 struct rpc_task *task;
408 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
409 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
411 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
415 if (ses->fc_slot_table.highest_used_slotid != -1)
418 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
419 complete(&ses->fc_slot_table.complete);
423 * Signal state manager thread if session back channel is drained
425 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
427 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
428 ses->bc_slot_table.highest_used_slotid != -1)
430 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
431 complete(&ses->bc_slot_table.complete);
434 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
436 struct nfs4_slot_table *tbl;
438 tbl = &res->sr_session->fc_slot_table;
440 /* just wake up the next guy waiting since
441 * we may have not consumed a slot after all */
442 dprintk("%s: No slot\n", __func__);
446 spin_lock(&tbl->slot_tbl_lock);
447 nfs4_free_slot(tbl, res->sr_slot);
448 nfs4_check_drain_fc_complete(res->sr_session);
449 spin_unlock(&tbl->slot_tbl_lock);
453 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
455 unsigned long timestamp;
456 struct nfs_client *clp;
459 * sr_status remains 1 if an RPC level error occurred. The server
460 * may or may not have processed the sequence operation..
461 * Proceed as if the server received and processed the sequence
464 if (res->sr_status == 1)
465 res->sr_status = NFS_OK;
467 /* don't increment the sequence number if the task wasn't sent */
468 if (!RPC_WAS_SENT(task))
471 /* Check the SEQUENCE operation status */
472 switch (res->sr_status) {
474 /* Update the slot's sequence and clientid lease timer */
475 ++res->sr_slot->seq_nr;
476 timestamp = res->sr_renewal_time;
477 clp = res->sr_session->clp;
478 do_renew_lease(clp, timestamp);
479 /* Check sequence flags */
480 if (res->sr_status_flags != 0)
481 nfs4_schedule_lease_recovery(clp);
484 /* The server detected a resend of the RPC call and
485 * returned NFS4ERR_DELAY as per Section 2.10.6.2
488 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
490 res->sr_slot - res->sr_session->fc_slot_table.slots,
491 res->sr_slot->seq_nr);
494 /* Just update the slot sequence no. */
495 ++res->sr_slot->seq_nr;
498 /* The session may be reset by one of the error handlers. */
499 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
500 nfs41_sequence_free_slot(res);
503 if (!rpc_restart_call(task))
505 rpc_delay(task, NFS4_POLL_RETRY_MAX);
509 static int nfs4_sequence_done(struct rpc_task *task,
510 struct nfs4_sequence_res *res)
512 if (res->sr_session == NULL)
514 return nfs41_sequence_done(task, res);
518 * nfs4_find_slot - efficiently look for a free slot
520 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
521 * If found, we mark the slot as used, update the highest_used_slotid,
522 * and respectively set up the sequence operation args.
523 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
525 * Note: must be called with under the slot_tbl_lock.
528 nfs4_find_slot(struct nfs4_slot_table *tbl)
531 u8 ret_id = NFS4_MAX_SLOT_TABLE;
532 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
534 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
535 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
537 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
538 if (slotid >= tbl->max_slots)
540 __set_bit(slotid, tbl->used_slots);
541 if (slotid > tbl->highest_used_slotid)
542 tbl->highest_used_slotid = slotid;
545 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
546 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
550 int nfs41_setup_sequence(struct nfs4_session *session,
551 struct nfs4_sequence_args *args,
552 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
560 dprintk("--> %s\n", __func__);
561 /* slot already allocated? */
562 if (res->sr_slot != NULL)
565 tbl = &session->fc_slot_table;
567 spin_lock(&tbl->slot_tbl_lock);
568 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
569 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
571 * The state manager will wait until the slot table is empty.
572 * Schedule the reset thread
574 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
575 spin_unlock(&tbl->slot_tbl_lock);
576 dprintk("%s Schedule Session Reset\n", __func__);
580 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
581 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
582 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
583 spin_unlock(&tbl->slot_tbl_lock);
584 dprintk("%s enforce FIFO order\n", __func__);
588 slotid = nfs4_find_slot(tbl);
589 if (slotid == NFS4_MAX_SLOT_TABLE) {
590 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
591 spin_unlock(&tbl->slot_tbl_lock);
592 dprintk("<-- %s: no free slots\n", __func__);
595 spin_unlock(&tbl->slot_tbl_lock);
597 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
598 slot = tbl->slots + slotid;
599 args->sa_session = session;
600 args->sa_slotid = slotid;
601 args->sa_cache_this = cache_reply;
603 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
605 res->sr_session = session;
607 res->sr_renewal_time = jiffies;
608 res->sr_status_flags = 0;
610 * sr_status is only set in decode_sequence, and so will remain
611 * set to 1 if an rpc level failure occurs.
616 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
618 int nfs4_setup_sequence(const struct nfs_server *server,
619 struct nfs4_sequence_args *args,
620 struct nfs4_sequence_res *res,
622 struct rpc_task *task)
624 struct nfs4_session *session = nfs4_get_session(server);
627 if (session == NULL) {
628 args->sa_session = NULL;
629 res->sr_session = NULL;
633 dprintk("--> %s clp %p session %p sr_slot %td\n",
634 __func__, session->clp, session, res->sr_slot ?
635 res->sr_slot - session->fc_slot_table.slots : -1);
637 ret = nfs41_setup_sequence(session, args, res, cache_reply,
640 dprintk("<-- %s status=%d\n", __func__, ret);
644 struct nfs41_call_sync_data {
645 const struct nfs_server *seq_server;
646 struct nfs4_sequence_args *seq_args;
647 struct nfs4_sequence_res *seq_res;
651 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
653 struct nfs41_call_sync_data *data = calldata;
655 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
657 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
658 data->seq_res, data->cache_reply, task))
660 rpc_call_start(task);
663 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
665 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
666 nfs41_call_sync_prepare(task, calldata);
669 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
671 struct nfs41_call_sync_data *data = calldata;
673 nfs41_sequence_done(task, data->seq_res);
676 struct rpc_call_ops nfs41_call_sync_ops = {
677 .rpc_call_prepare = nfs41_call_sync_prepare,
678 .rpc_call_done = nfs41_call_sync_done,
681 struct rpc_call_ops nfs41_call_priv_sync_ops = {
682 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
683 .rpc_call_done = nfs41_call_sync_done,
686 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
687 struct nfs_server *server,
688 struct rpc_message *msg,
689 struct nfs4_sequence_args *args,
690 struct nfs4_sequence_res *res,
695 struct rpc_task *task;
696 struct nfs41_call_sync_data data = {
697 .seq_server = server,
700 .cache_reply = cache_reply,
702 struct rpc_task_setup task_setup = {
705 .callback_ops = &nfs41_call_sync_ops,
706 .callback_data = &data
711 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
712 task = rpc_run_task(&task_setup);
716 ret = task->tk_status;
722 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
723 struct nfs_server *server,
724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
729 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
733 static int nfs4_sequence_done(struct rpc_task *task,
734 struct nfs4_sequence_res *res)
738 #endif /* CONFIG_NFS_V4_1 */
740 int _nfs4_call_sync(struct rpc_clnt *clnt,
741 struct nfs_server *server,
742 struct rpc_message *msg,
743 struct nfs4_sequence_args *args,
744 struct nfs4_sequence_res *res,
747 args->sa_session = res->sr_session = NULL;
748 return rpc_call_sync(clnt, msg, 0);
752 int nfs4_call_sync(struct rpc_clnt *clnt,
753 struct nfs_server *server,
754 struct rpc_message *msg,
755 struct nfs4_sequence_args *args,
756 struct nfs4_sequence_res *res,
759 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
760 args, res, cache_reply);
763 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
765 struct nfs_inode *nfsi = NFS_I(dir);
767 spin_lock(&dir->i_lock);
768 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
769 if (!cinfo->atomic || cinfo->before != dir->i_version)
770 nfs_force_lookup_revalidate(dir);
771 dir->i_version = cinfo->after;
772 spin_unlock(&dir->i_lock);
775 struct nfs4_opendata {
777 struct nfs_openargs o_arg;
778 struct nfs_openres o_res;
779 struct nfs_open_confirmargs c_arg;
780 struct nfs_open_confirmres c_res;
781 struct nfs_fattr f_attr;
782 struct nfs_fattr dir_attr;
784 struct dentry *dentry;
785 struct nfs4_state_owner *owner;
786 struct nfs4_state *state;
788 unsigned long timestamp;
789 unsigned int rpc_done : 1;
795 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
797 p->o_res.f_attr = &p->f_attr;
798 p->o_res.dir_attr = &p->dir_attr;
799 p->o_res.seqid = p->o_arg.seqid;
800 p->c_res.seqid = p->c_arg.seqid;
801 p->o_res.server = p->o_arg.server;
802 nfs_fattr_init(&p->f_attr);
803 nfs_fattr_init(&p->dir_attr);
806 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
807 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
808 const struct iattr *attrs,
811 struct dentry *parent = dget_parent(dentry);
812 struct inode *dir = parent->d_inode;
813 struct nfs_server *server = NFS_SERVER(dir);
814 struct nfs4_opendata *p;
816 p = kzalloc(sizeof(*p), gfp_mask);
819 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
820 if (p->o_arg.seqid == NULL)
822 nfs_sb_active(dentry->d_sb);
823 p->dentry = dget(dentry);
826 atomic_inc(&sp->so_count);
827 p->o_arg.fh = NFS_FH(dir);
828 p->o_arg.open_flags = flags;
829 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
830 p->o_arg.clientid = server->nfs_client->cl_clientid;
831 p->o_arg.id = sp->so_owner_id.id;
832 p->o_arg.name = &dentry->d_name;
833 p->o_arg.server = server;
834 p->o_arg.bitmask = server->attr_bitmask;
835 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
836 if (flags & O_CREAT) {
839 p->o_arg.u.attrs = &p->attrs;
840 memcpy(&p->attrs, attrs, sizeof(p->attrs));
841 s = (u32 *) p->o_arg.u.verifier.data;
845 p->c_arg.fh = &p->o_res.fh;
846 p->c_arg.stateid = &p->o_res.stateid;
847 p->c_arg.seqid = p->o_arg.seqid;
848 nfs4_init_opendata_res(p);
858 static void nfs4_opendata_free(struct kref *kref)
860 struct nfs4_opendata *p = container_of(kref,
861 struct nfs4_opendata, kref);
862 struct super_block *sb = p->dentry->d_sb;
864 nfs_free_seqid(p->o_arg.seqid);
865 if (p->state != NULL)
866 nfs4_put_open_state(p->state);
867 nfs4_put_state_owner(p->owner);
874 static void nfs4_opendata_put(struct nfs4_opendata *p)
877 kref_put(&p->kref, nfs4_opendata_free);
880 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
884 ret = rpc_wait_for_completion_task(task);
888 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
892 if (open_mode & O_EXCL)
894 switch (mode & (FMODE_READ|FMODE_WRITE)) {
896 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
897 && state->n_rdonly != 0;
900 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
901 && state->n_wronly != 0;
903 case FMODE_READ|FMODE_WRITE:
904 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
905 && state->n_rdwr != 0;
911 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
913 if (delegation == NULL)
915 if ((delegation->type & fmode) != fmode)
917 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
919 nfs_mark_delegation_referenced(delegation);
923 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
932 case FMODE_READ|FMODE_WRITE:
935 nfs4_state_set_mode_locked(state, state->state | fmode);
938 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
941 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
942 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
945 set_bit(NFS_O_RDONLY_STATE, &state->flags);
948 set_bit(NFS_O_WRONLY_STATE, &state->flags);
950 case FMODE_READ|FMODE_WRITE:
951 set_bit(NFS_O_RDWR_STATE, &state->flags);
955 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
957 write_seqlock(&state->seqlock);
958 nfs_set_open_stateid_locked(state, stateid, fmode);
959 write_sequnlock(&state->seqlock);
962 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
965 * Protect the call to nfs4_state_set_mode_locked and
966 * serialise the stateid update
968 write_seqlock(&state->seqlock);
969 if (deleg_stateid != NULL) {
970 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
971 set_bit(NFS_DELEGATED_STATE, &state->flags);
973 if (open_stateid != NULL)
974 nfs_set_open_stateid_locked(state, open_stateid, fmode);
975 write_sequnlock(&state->seqlock);
976 spin_lock(&state->owner->so_lock);
977 update_open_stateflags(state, fmode);
978 spin_unlock(&state->owner->so_lock);
981 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
983 struct nfs_inode *nfsi = NFS_I(state->inode);
984 struct nfs_delegation *deleg_cur;
987 fmode &= (FMODE_READ|FMODE_WRITE);
990 deleg_cur = rcu_dereference(nfsi->delegation);
991 if (deleg_cur == NULL)
994 spin_lock(&deleg_cur->lock);
995 if (nfsi->delegation != deleg_cur ||
996 (deleg_cur->type & fmode) != fmode)
997 goto no_delegation_unlock;
999 if (delegation == NULL)
1000 delegation = &deleg_cur->stateid;
1001 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1002 goto no_delegation_unlock;
1004 nfs_mark_delegation_referenced(deleg_cur);
1005 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1007 no_delegation_unlock:
1008 spin_unlock(&deleg_cur->lock);
1012 if (!ret && open_stateid != NULL) {
1013 __update_open_stateid(state, open_stateid, NULL, fmode);
1021 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1023 struct nfs_delegation *delegation;
1026 delegation = rcu_dereference(NFS_I(inode)->delegation);
1027 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1032 nfs_inode_return_delegation(inode);
1035 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1037 struct nfs4_state *state = opendata->state;
1038 struct nfs_inode *nfsi = NFS_I(state->inode);
1039 struct nfs_delegation *delegation;
1040 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1041 fmode_t fmode = opendata->o_arg.fmode;
1042 nfs4_stateid stateid;
1046 if (can_open_cached(state, fmode, open_mode)) {
1047 spin_lock(&state->owner->so_lock);
1048 if (can_open_cached(state, fmode, open_mode)) {
1049 update_open_stateflags(state, fmode);
1050 spin_unlock(&state->owner->so_lock);
1051 goto out_return_state;
1053 spin_unlock(&state->owner->so_lock);
1056 delegation = rcu_dereference(nfsi->delegation);
1057 if (!can_open_delegated(delegation, fmode)) {
1061 /* Save the delegation */
1062 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1064 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1069 /* Try to update the stateid using the delegation */
1070 if (update_open_stateid(state, NULL, &stateid, fmode))
1071 goto out_return_state;
1074 return ERR_PTR(ret);
1076 atomic_inc(&state->count);
1080 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1082 struct inode *inode;
1083 struct nfs4_state *state = NULL;
1084 struct nfs_delegation *delegation;
1087 if (!data->rpc_done) {
1088 state = nfs4_try_open_cached(data);
1093 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1095 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1096 ret = PTR_ERR(inode);
1100 state = nfs4_get_open_state(inode, data->owner);
1103 if (data->o_res.delegation_type != 0) {
1104 int delegation_flags = 0;
1107 delegation = rcu_dereference(NFS_I(inode)->delegation);
1109 delegation_flags = delegation->flags;
1111 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1112 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1113 "returning a delegation for "
1114 "OPEN(CLAIM_DELEGATE_CUR)\n",
1115 NFS_CLIENT(inode)->cl_server);
1116 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1117 nfs_inode_set_delegation(state->inode,
1118 data->owner->so_cred,
1121 nfs_inode_reclaim_delegation(state->inode,
1122 data->owner->so_cred,
1126 update_open_stateid(state, &data->o_res.stateid, NULL,
1134 return ERR_PTR(ret);
1137 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1139 struct nfs_inode *nfsi = NFS_I(state->inode);
1140 struct nfs_open_context *ctx;
1142 spin_lock(&state->inode->i_lock);
1143 list_for_each_entry(ctx, &nfsi->open_files, list) {
1144 if (ctx->state != state)
1146 get_nfs_open_context(ctx);
1147 spin_unlock(&state->inode->i_lock);
1150 spin_unlock(&state->inode->i_lock);
1151 return ERR_PTR(-ENOENT);
1154 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1156 struct nfs4_opendata *opendata;
1158 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1159 if (opendata == NULL)
1160 return ERR_PTR(-ENOMEM);
1161 opendata->state = state;
1162 atomic_inc(&state->count);
1166 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1168 struct nfs4_state *newstate;
1171 opendata->o_arg.open_flags = 0;
1172 opendata->o_arg.fmode = fmode;
1173 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1174 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1175 nfs4_init_opendata_res(opendata);
1176 ret = _nfs4_recover_proc_open(opendata);
1179 newstate = nfs4_opendata_to_nfs4_state(opendata);
1180 if (IS_ERR(newstate))
1181 return PTR_ERR(newstate);
1182 nfs4_close_state(newstate, fmode);
1187 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1189 struct nfs4_state *newstate;
1192 /* memory barrier prior to reading state->n_* */
1193 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1195 if (state->n_rdwr != 0) {
1196 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1197 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1200 if (newstate != state)
1203 if (state->n_wronly != 0) {
1204 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1205 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1208 if (newstate != state)
1211 if (state->n_rdonly != 0) {
1212 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1216 if (newstate != state)
1220 * We may have performed cached opens for all three recoveries.
1221 * Check if we need to update the current stateid.
1223 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1224 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1225 write_seqlock(&state->seqlock);
1226 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1227 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1228 write_sequnlock(&state->seqlock);
1235 * reclaim state on the server after a reboot.
1237 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1239 struct nfs_delegation *delegation;
1240 struct nfs4_opendata *opendata;
1241 fmode_t delegation_type = 0;
1244 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1245 if (IS_ERR(opendata))
1246 return PTR_ERR(opendata);
1247 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1248 opendata->o_arg.fh = NFS_FH(state->inode);
1250 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1251 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1252 delegation_type = delegation->type;
1254 opendata->o_arg.u.delegation_type = delegation_type;
1255 status = nfs4_open_recover(opendata, state);
1256 nfs4_opendata_put(opendata);
1260 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1262 struct nfs_server *server = NFS_SERVER(state->inode);
1263 struct nfs4_exception exception = { };
1266 err = _nfs4_do_open_reclaim(ctx, state);
1267 if (err != -NFS4ERR_DELAY)
1269 nfs4_handle_exception(server, err, &exception);
1270 } while (exception.retry);
1274 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1276 struct nfs_open_context *ctx;
1279 ctx = nfs4_state_find_open_context(state);
1281 return PTR_ERR(ctx);
1282 ret = nfs4_do_open_reclaim(ctx, state);
1283 put_nfs_open_context(ctx);
1287 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1289 struct nfs4_opendata *opendata;
1292 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1293 if (IS_ERR(opendata))
1294 return PTR_ERR(opendata);
1295 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1296 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1297 sizeof(opendata->o_arg.u.delegation.data));
1298 ret = nfs4_open_recover(opendata, state);
1299 nfs4_opendata_put(opendata);
1303 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1305 struct nfs4_exception exception = { };
1306 struct nfs_server *server = NFS_SERVER(state->inode);
1309 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1315 case -NFS4ERR_BADSESSION:
1316 case -NFS4ERR_BADSLOT:
1317 case -NFS4ERR_BAD_HIGH_SLOT:
1318 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1319 case -NFS4ERR_DEADSESSION:
1320 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1322 case -NFS4ERR_STALE_CLIENTID:
1323 case -NFS4ERR_STALE_STATEID:
1324 case -NFS4ERR_EXPIRED:
1325 /* Don't recall a delegation if it was lost */
1326 nfs4_schedule_lease_recovery(server->nfs_client);
1330 * The show must go on: exit, but mark the
1331 * stateid as needing recovery.
1333 case -NFS4ERR_DELEG_REVOKED:
1334 case -NFS4ERR_ADMIN_REVOKED:
1335 case -NFS4ERR_BAD_STATEID:
1336 nfs_inode_find_state_and_recover(state->inode,
1338 nfs4_schedule_stateid_recovery(server, state);
1341 * User RPCSEC_GSS context has expired.
1342 * We cannot recover this stateid now, so
1343 * skip it and allow recovery thread to
1350 err = nfs4_handle_exception(server, err, &exception);
1351 } while (exception.retry);
1356 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1358 struct nfs4_opendata *data = calldata;
1360 data->rpc_status = task->tk_status;
1361 if (data->rpc_status == 0) {
1362 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1363 sizeof(data->o_res.stateid.data));
1364 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1365 renew_lease(data->o_res.server, data->timestamp);
1370 static void nfs4_open_confirm_release(void *calldata)
1372 struct nfs4_opendata *data = calldata;
1373 struct nfs4_state *state = NULL;
1375 /* If this request hasn't been cancelled, do nothing */
1376 if (data->cancelled == 0)
1378 /* In case of error, no cleanup! */
1379 if (!data->rpc_done)
1381 state = nfs4_opendata_to_nfs4_state(data);
1383 nfs4_close_state(state, data->o_arg.fmode);
1385 nfs4_opendata_put(data);
1388 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1389 .rpc_call_done = nfs4_open_confirm_done,
1390 .rpc_release = nfs4_open_confirm_release,
1394 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1396 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1398 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1399 struct rpc_task *task;
1400 struct rpc_message msg = {
1401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1402 .rpc_argp = &data->c_arg,
1403 .rpc_resp = &data->c_res,
1404 .rpc_cred = data->owner->so_cred,
1406 struct rpc_task_setup task_setup_data = {
1407 .rpc_client = server->client,
1408 .rpc_message = &msg,
1409 .callback_ops = &nfs4_open_confirm_ops,
1410 .callback_data = data,
1411 .workqueue = nfsiod_workqueue,
1412 .flags = RPC_TASK_ASYNC,
1416 kref_get(&data->kref);
1418 data->rpc_status = 0;
1419 data->timestamp = jiffies;
1420 task = rpc_run_task(&task_setup_data);
1422 return PTR_ERR(task);
1423 status = nfs4_wait_for_completion_rpc_task(task);
1425 data->cancelled = 1;
1428 status = data->rpc_status;
1433 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1435 struct nfs4_opendata *data = calldata;
1436 struct nfs4_state_owner *sp = data->owner;
1438 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1441 * Check if we still need to send an OPEN call, or if we can use
1442 * a delegation instead.
1444 if (data->state != NULL) {
1445 struct nfs_delegation *delegation;
1447 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1450 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1451 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1452 can_open_delegated(delegation, data->o_arg.fmode))
1453 goto unlock_no_action;
1456 /* Update sequence id. */
1457 data->o_arg.id = sp->so_owner_id.id;
1458 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1459 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1460 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1461 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1463 data->timestamp = jiffies;
1464 if (nfs4_setup_sequence(data->o_arg.server,
1465 &data->o_arg.seq_args,
1466 &data->o_res.seq_res, 1, task))
1468 rpc_call_start(task);
1473 task->tk_action = NULL;
1477 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1479 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1480 nfs4_open_prepare(task, calldata);
1483 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1485 struct nfs4_opendata *data = calldata;
1487 data->rpc_status = task->tk_status;
1489 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1492 if (task->tk_status == 0) {
1493 switch (data->o_res.f_attr->mode & S_IFMT) {
1497 data->rpc_status = -ELOOP;
1500 data->rpc_status = -EISDIR;
1503 data->rpc_status = -ENOTDIR;
1505 renew_lease(data->o_res.server, data->timestamp);
1506 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1507 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1512 static void nfs4_open_release(void *calldata)
1514 struct nfs4_opendata *data = calldata;
1515 struct nfs4_state *state = NULL;
1517 /* If this request hasn't been cancelled, do nothing */
1518 if (data->cancelled == 0)
1520 /* In case of error, no cleanup! */
1521 if (data->rpc_status != 0 || !data->rpc_done)
1523 /* In case we need an open_confirm, no cleanup! */
1524 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1526 state = nfs4_opendata_to_nfs4_state(data);
1528 nfs4_close_state(state, data->o_arg.fmode);
1530 nfs4_opendata_put(data);
1533 static const struct rpc_call_ops nfs4_open_ops = {
1534 .rpc_call_prepare = nfs4_open_prepare,
1535 .rpc_call_done = nfs4_open_done,
1536 .rpc_release = nfs4_open_release,
1539 static const struct rpc_call_ops nfs4_recover_open_ops = {
1540 .rpc_call_prepare = nfs4_recover_open_prepare,
1541 .rpc_call_done = nfs4_open_done,
1542 .rpc_release = nfs4_open_release,
1545 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1547 struct inode *dir = data->dir->d_inode;
1548 struct nfs_server *server = NFS_SERVER(dir);
1549 struct nfs_openargs *o_arg = &data->o_arg;
1550 struct nfs_openres *o_res = &data->o_res;
1551 struct rpc_task *task;
1552 struct rpc_message msg = {
1553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1556 .rpc_cred = data->owner->so_cred,
1558 struct rpc_task_setup task_setup_data = {
1559 .rpc_client = server->client,
1560 .rpc_message = &msg,
1561 .callback_ops = &nfs4_open_ops,
1562 .callback_data = data,
1563 .workqueue = nfsiod_workqueue,
1564 .flags = RPC_TASK_ASYNC,
1568 kref_get(&data->kref);
1570 data->rpc_status = 0;
1571 data->cancelled = 0;
1573 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1574 task = rpc_run_task(&task_setup_data);
1576 return PTR_ERR(task);
1577 status = nfs4_wait_for_completion_rpc_task(task);
1579 data->cancelled = 1;
1582 status = data->rpc_status;
1588 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1590 struct inode *dir = data->dir->d_inode;
1591 struct nfs_openres *o_res = &data->o_res;
1594 status = nfs4_run_open_task(data, 1);
1595 if (status != 0 || !data->rpc_done)
1598 nfs_refresh_inode(dir, o_res->dir_attr);
1600 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1601 status = _nfs4_proc_open_confirm(data);
1610 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1612 static int _nfs4_proc_open(struct nfs4_opendata *data)
1614 struct inode *dir = data->dir->d_inode;
1615 struct nfs_server *server = NFS_SERVER(dir);
1616 struct nfs_openargs *o_arg = &data->o_arg;
1617 struct nfs_openres *o_res = &data->o_res;
1620 status = nfs4_run_open_task(data, 0);
1621 if (!data->rpc_done)
1624 if (status == -NFS4ERR_BADNAME &&
1625 !(o_arg->open_flags & O_CREAT))
1630 if (o_arg->open_flags & O_CREAT) {
1631 update_changeattr(dir, &o_res->cinfo);
1632 nfs_post_op_update_inode(dir, o_res->dir_attr);
1634 nfs_refresh_inode(dir, o_res->dir_attr);
1635 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1636 server->caps &= ~NFS_CAP_POSIX_LOCK;
1637 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1642 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1643 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1647 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1652 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1653 ret = nfs4_wait_clnt_recover(clp);
1656 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1657 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1659 nfs4_schedule_state_manager(clp);
1665 static int nfs4_recover_expired_lease(struct nfs_server *server)
1667 return nfs4_client_recover_expired_lease(server->nfs_client);
1672 * reclaim state on the server after a network partition.
1673 * Assumes caller holds the appropriate lock
1675 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1677 struct nfs4_opendata *opendata;
1680 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1681 if (IS_ERR(opendata))
1682 return PTR_ERR(opendata);
1683 ret = nfs4_open_recover(opendata, state);
1685 d_drop(ctx->dentry);
1686 nfs4_opendata_put(opendata);
1690 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1692 struct nfs_server *server = NFS_SERVER(state->inode);
1693 struct nfs4_exception exception = { };
1697 err = _nfs4_open_expired(ctx, state);
1701 case -NFS4ERR_GRACE:
1702 case -NFS4ERR_DELAY:
1703 nfs4_handle_exception(server, err, &exception);
1706 } while (exception.retry);
1711 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1713 struct nfs_open_context *ctx;
1716 ctx = nfs4_state_find_open_context(state);
1718 return PTR_ERR(ctx);
1719 ret = nfs4_do_open_expired(ctx, state);
1720 put_nfs_open_context(ctx);
1724 #if defined(CONFIG_NFS_V4_1)
1725 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1728 struct nfs_server *server = NFS_SERVER(state->inode);
1730 status = nfs41_test_stateid(server, state);
1731 if (status == NFS_OK)
1733 nfs41_free_stateid(server, state);
1734 return nfs4_open_expired(sp, state);
1739 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1740 * fields corresponding to attributes that were used to store the verifier.
1741 * Make sure we clobber those fields in the later setattr call
1743 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1745 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1746 !(sattr->ia_valid & ATTR_ATIME_SET))
1747 sattr->ia_valid |= ATTR_ATIME;
1749 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1750 !(sattr->ia_valid & ATTR_MTIME_SET))
1751 sattr->ia_valid |= ATTR_MTIME;
1755 * Returns a referenced nfs4_state
1757 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)
1759 struct nfs4_state_owner *sp;
1760 struct nfs4_state *state = NULL;
1761 struct nfs_server *server = NFS_SERVER(dir);
1762 struct nfs4_opendata *opendata;
1765 /* Protect against reboot recovery conflicts */
1767 if (!(sp = nfs4_get_state_owner(server, cred))) {
1768 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1771 status = nfs4_recover_expired_lease(server);
1773 goto err_put_state_owner;
1774 if (dentry->d_inode != NULL)
1775 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1777 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1778 if (opendata == NULL)
1779 goto err_put_state_owner;
1781 if (dentry->d_inode != NULL)
1782 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1784 status = _nfs4_proc_open(opendata);
1786 goto err_opendata_put;
1788 state = nfs4_opendata_to_nfs4_state(opendata);
1789 status = PTR_ERR(state);
1791 goto err_opendata_put;
1792 if (server->caps & NFS_CAP_POSIX_LOCK)
1793 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1795 if (opendata->o_arg.open_flags & O_EXCL) {
1796 nfs4_exclusive_attrset(opendata, sattr);
1798 nfs_fattr_init(opendata->o_res.f_attr);
1799 status = nfs4_do_setattr(state->inode, cred,
1800 opendata->o_res.f_attr, sattr,
1803 nfs_setattr_update_inode(state->inode, sattr);
1804 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1806 nfs_revalidate_inode(server, state->inode);
1807 nfs4_opendata_put(opendata);
1808 nfs4_put_state_owner(sp);
1812 nfs4_opendata_put(opendata);
1813 err_put_state_owner:
1814 nfs4_put_state_owner(sp);
1821 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)
1823 struct nfs4_exception exception = { };
1824 struct nfs4_state *res;
1827 fmode &= FMODE_READ|FMODE_WRITE;
1829 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1832 /* NOTE: BAD_SEQID means the server and client disagree about the
1833 * book-keeping w.r.t. state-changing operations
1834 * (OPEN/CLOSE/LOCK/LOCKU...)
1835 * It is actually a sign of a bug on the client or on the server.
1837 * If we receive a BAD_SEQID error in the particular case of
1838 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1839 * have unhashed the old state_owner for us, and that we can
1840 * therefore safely retry using a new one. We should still warn
1841 * the user though...
1843 if (status == -NFS4ERR_BAD_SEQID) {
1844 pr_warn_ratelimited("NFS: v4 server %s "
1845 " returned a bad sequence-id error!\n",
1846 NFS_SERVER(dir)->nfs_client->cl_hostname);
1847 exception.retry = 1;
1851 * BAD_STATEID on OPEN means that the server cancelled our
1852 * state before it received the OPEN_CONFIRM.
1853 * Recover by retrying the request as per the discussion
1854 * on Page 181 of RFC3530.
1856 if (status == -NFS4ERR_BAD_STATEID) {
1857 exception.retry = 1;
1860 if (status == -EAGAIN) {
1861 /* We must have found a delegation */
1862 exception.retry = 1;
1865 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1866 status, &exception));
1867 } while (exception.retry);
1871 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1872 struct nfs_fattr *fattr, struct iattr *sattr,
1873 struct nfs4_state *state)
1875 struct nfs_server *server = NFS_SERVER(inode);
1876 struct nfs_setattrargs arg = {
1877 .fh = NFS_FH(inode),
1880 .bitmask = server->attr_bitmask,
1882 struct nfs_setattrres res = {
1886 struct rpc_message msg = {
1887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1892 unsigned long timestamp = jiffies;
1895 nfs_fattr_init(fattr);
1897 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1898 /* Use that stateid */
1899 } else if (state != NULL) {
1900 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1902 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1904 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1905 if (status == 0 && state != NULL)
1906 renew_lease(server, timestamp);
1910 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1911 struct nfs_fattr *fattr, struct iattr *sattr,
1912 struct nfs4_state *state)
1914 struct nfs_server *server = NFS_SERVER(inode);
1915 struct nfs4_exception exception = {
1921 err = nfs4_handle_exception(server,
1922 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1924 } while (exception.retry);
1928 struct nfs4_closedata {
1929 struct inode *inode;
1930 struct nfs4_state *state;
1931 struct nfs_closeargs arg;
1932 struct nfs_closeres res;
1933 struct nfs_fattr fattr;
1934 unsigned long timestamp;
1939 static void nfs4_free_closedata(void *data)
1941 struct nfs4_closedata *calldata = data;
1942 struct nfs4_state_owner *sp = calldata->state->owner;
1943 struct super_block *sb = calldata->state->inode->i_sb;
1946 pnfs_roc_release(calldata->state->inode);
1947 nfs4_put_open_state(calldata->state);
1948 nfs_free_seqid(calldata->arg.seqid);
1949 nfs4_put_state_owner(sp);
1950 nfs_sb_deactive(sb);
1954 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1957 spin_lock(&state->owner->so_lock);
1958 if (!(fmode & FMODE_READ))
1959 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1960 if (!(fmode & FMODE_WRITE))
1961 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1962 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1963 spin_unlock(&state->owner->so_lock);
1966 static void nfs4_close_done(struct rpc_task *task, void *data)
1968 struct nfs4_closedata *calldata = data;
1969 struct nfs4_state *state = calldata->state;
1970 struct nfs_server *server = NFS_SERVER(calldata->inode);
1972 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1974 /* hmm. we are done with the inode, and in the process of freeing
1975 * the state_owner. we keep this around to process errors
1977 switch (task->tk_status) {
1980 pnfs_roc_set_barrier(state->inode,
1981 calldata->roc_barrier);
1982 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1983 renew_lease(server, calldata->timestamp);
1984 nfs4_close_clear_stateid_flags(state,
1985 calldata->arg.fmode);
1987 case -NFS4ERR_STALE_STATEID:
1988 case -NFS4ERR_OLD_STATEID:
1989 case -NFS4ERR_BAD_STATEID:
1990 case -NFS4ERR_EXPIRED:
1991 if (calldata->arg.fmode == 0)
1994 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1995 rpc_restart_call_prepare(task);
1997 nfs_release_seqid(calldata->arg.seqid);
1998 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2001 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2003 struct nfs4_closedata *calldata = data;
2004 struct nfs4_state *state = calldata->state;
2007 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2010 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2011 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2012 spin_lock(&state->owner->so_lock);
2013 /* Calculate the change in open mode */
2014 if (state->n_rdwr == 0) {
2015 if (state->n_rdonly == 0) {
2016 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2017 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2018 calldata->arg.fmode &= ~FMODE_READ;
2020 if (state->n_wronly == 0) {
2021 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2022 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2023 calldata->arg.fmode &= ~FMODE_WRITE;
2026 spin_unlock(&state->owner->so_lock);
2029 /* Note: exit _without_ calling nfs4_close_done */
2030 task->tk_action = NULL;
2034 if (calldata->arg.fmode == 0) {
2035 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2036 if (calldata->roc &&
2037 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2038 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2044 nfs_fattr_init(calldata->res.fattr);
2045 calldata->timestamp = jiffies;
2046 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2047 &calldata->arg.seq_args, &calldata->res.seq_res,
2050 rpc_call_start(task);
2053 static const struct rpc_call_ops nfs4_close_ops = {
2054 .rpc_call_prepare = nfs4_close_prepare,
2055 .rpc_call_done = nfs4_close_done,
2056 .rpc_release = nfs4_free_closedata,
2060 * It is possible for data to be read/written from a mem-mapped file
2061 * after the sys_close call (which hits the vfs layer as a flush).
2062 * This means that we can't safely call nfsv4 close on a file until
2063 * the inode is cleared. This in turn means that we are not good
2064 * NFSv4 citizens - we do not indicate to the server to update the file's
2065 * share state even when we are done with one of the three share
2066 * stateid's in the inode.
2068 * NOTE: Caller must be holding the sp->so_owner semaphore!
2070 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2072 struct nfs_server *server = NFS_SERVER(state->inode);
2073 struct nfs4_closedata *calldata;
2074 struct nfs4_state_owner *sp = state->owner;
2075 struct rpc_task *task;
2076 struct rpc_message msg = {
2077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2078 .rpc_cred = state->owner->so_cred,
2080 struct rpc_task_setup task_setup_data = {
2081 .rpc_client = server->client,
2082 .rpc_message = &msg,
2083 .callback_ops = &nfs4_close_ops,
2084 .workqueue = nfsiod_workqueue,
2085 .flags = RPC_TASK_ASYNC,
2087 int status = -ENOMEM;
2089 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2090 if (calldata == NULL)
2092 calldata->inode = state->inode;
2093 calldata->state = state;
2094 calldata->arg.fh = NFS_FH(state->inode);
2095 calldata->arg.stateid = &state->open_stateid;
2096 /* Serialization for the sequence id */
2097 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2098 if (calldata->arg.seqid == NULL)
2099 goto out_free_calldata;
2100 calldata->arg.fmode = 0;
2101 calldata->arg.bitmask = server->cache_consistency_bitmask;
2102 calldata->res.fattr = &calldata->fattr;
2103 calldata->res.seqid = calldata->arg.seqid;
2104 calldata->res.server = server;
2105 calldata->roc = roc;
2106 nfs_sb_active(calldata->inode->i_sb);
2108 msg.rpc_argp = &calldata->arg;
2109 msg.rpc_resp = &calldata->res;
2110 task_setup_data.callback_data = calldata;
2111 task = rpc_run_task(&task_setup_data);
2113 return PTR_ERR(task);
2116 status = rpc_wait_for_completion_task(task);
2123 pnfs_roc_release(state->inode);
2124 nfs4_put_open_state(state);
2125 nfs4_put_state_owner(sp);
2129 static struct inode *
2130 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2132 struct nfs4_state *state;
2134 /* Protect against concurrent sillydeletes */
2135 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2137 return ERR_CAST(state);
2139 return igrab(state->inode);
2142 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2144 if (ctx->state == NULL)
2147 nfs4_close_sync(ctx->state, ctx->mode);
2149 nfs4_close_state(ctx->state, ctx->mode);
2152 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2154 struct nfs4_server_caps_arg args = {
2157 struct nfs4_server_caps_res res = {};
2158 struct rpc_message msg = {
2159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2165 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2167 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2168 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2169 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2170 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2171 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2172 NFS_CAP_CTIME|NFS_CAP_MTIME);
2173 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2174 server->caps |= NFS_CAP_ACLS;
2175 if (res.has_links != 0)
2176 server->caps |= NFS_CAP_HARDLINKS;
2177 if (res.has_symlinks != 0)
2178 server->caps |= NFS_CAP_SYMLINKS;
2179 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2180 server->caps |= NFS_CAP_FILEID;
2181 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2182 server->caps |= NFS_CAP_MODE;
2183 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2184 server->caps |= NFS_CAP_NLINK;
2185 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2186 server->caps |= NFS_CAP_OWNER;
2187 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2188 server->caps |= NFS_CAP_OWNER_GROUP;
2189 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2190 server->caps |= NFS_CAP_ATIME;
2191 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2192 server->caps |= NFS_CAP_CTIME;
2193 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2194 server->caps |= NFS_CAP_MTIME;
2196 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2197 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2198 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2199 server->acl_bitmask = res.acl_bitmask;
2205 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2207 struct nfs4_exception exception = { };
2210 err = nfs4_handle_exception(server,
2211 _nfs4_server_capabilities(server, fhandle),
2213 } while (exception.retry);
2217 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2218 struct nfs_fsinfo *info)
2220 struct nfs4_lookup_root_arg args = {
2221 .bitmask = nfs4_fattr_bitmap,
2223 struct nfs4_lookup_res res = {
2225 .fattr = info->fattr,
2228 struct rpc_message msg = {
2229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2234 nfs_fattr_init(info->fattr);
2235 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2238 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2239 struct nfs_fsinfo *info)
2241 struct nfs4_exception exception = { };
2244 err = _nfs4_lookup_root(server, fhandle, info);
2247 case -NFS4ERR_WRONGSEC:
2250 err = nfs4_handle_exception(server, err, &exception);
2252 } while (exception.retry);
2257 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2258 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2260 struct rpc_auth *auth;
2263 auth = rpcauth_create(flavor, server->client);
2268 ret = nfs4_lookup_root(server, fhandle, info);
2273 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2274 struct nfs_fsinfo *info)
2276 int i, len, status = 0;
2277 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2279 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2280 flav_array[len] = RPC_AUTH_NULL;
2283 for (i = 0; i < len; i++) {
2284 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2285 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2290 * -EACCESS could mean that the user doesn't have correct permissions
2291 * to access the mount. It could also mean that we tried to mount
2292 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2293 * existing mount programs don't handle -EACCES very well so it should
2294 * be mapped to -EPERM instead.
2296 if (status == -EACCES)
2302 * get the file handle for the "/" directory on the server
2304 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2305 struct nfs_fsinfo *info)
2307 int minor_version = server->nfs_client->cl_minorversion;
2308 int status = nfs4_lookup_root(server, fhandle, info);
2309 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2311 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2312 * by nfs4_map_errors() as this function exits.
2314 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2316 status = nfs4_server_capabilities(server, fhandle);
2318 status = nfs4_do_fsinfo(server, fhandle, info);
2319 return nfs4_map_errors(status);
2322 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2324 * Get locations and (maybe) other attributes of a referral.
2325 * Note that we'll actually follow the referral later when
2326 * we detect fsid mismatch in inode revalidation
2328 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2329 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2331 int status = -ENOMEM;
2332 struct page *page = NULL;
2333 struct nfs4_fs_locations *locations = NULL;
2335 page = alloc_page(GFP_KERNEL);
2338 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2339 if (locations == NULL)
2342 status = nfs4_proc_fs_locations(dir, name, locations, page);
2345 /* Make sure server returned a different fsid for the referral */
2346 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2347 dprintk("%s: server did not return a different fsid for"
2348 " a referral at %s\n", __func__, name->name);
2352 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2353 nfs_fixup_referral_attributes(&locations->fattr);
2355 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2356 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2357 memset(fhandle, 0, sizeof(struct nfs_fh));
2365 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2367 struct nfs4_getattr_arg args = {
2369 .bitmask = server->attr_bitmask,
2371 struct nfs4_getattr_res res = {
2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2381 nfs_fattr_init(fattr);
2382 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2385 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2387 struct nfs4_exception exception = { };
2390 err = nfs4_handle_exception(server,
2391 _nfs4_proc_getattr(server, fhandle, fattr),
2393 } while (exception.retry);
2398 * The file is not closed if it is opened due to the a request to change
2399 * the size of the file. The open call will not be needed once the
2400 * VFS layer lookup-intents are implemented.
2402 * Close is called when the inode is destroyed.
2403 * If we haven't opened the file for O_WRONLY, we
2404 * need to in the size_change case to obtain a stateid.
2407 * Because OPEN is always done by name in nfsv4, it is
2408 * possible that we opened a different file by the same
2409 * name. We can recognize this race condition, but we
2410 * can't do anything about it besides returning an error.
2412 * This will be fixed with VFS changes (lookup-intent).
2415 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2416 struct iattr *sattr)
2418 struct inode *inode = dentry->d_inode;
2419 struct rpc_cred *cred = NULL;
2420 struct nfs4_state *state = NULL;
2423 if (pnfs_ld_layoutret_on_setattr(inode))
2424 pnfs_return_layout(inode);
2426 nfs_fattr_init(fattr);
2428 /* Search for an existing open(O_WRITE) file */
2429 if (sattr->ia_valid & ATTR_FILE) {
2430 struct nfs_open_context *ctx;
2432 ctx = nfs_file_open_context(sattr->ia_file);
2439 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2441 nfs_setattr_update_inode(inode, sattr);
2445 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2446 const struct qstr *name, struct nfs_fh *fhandle,
2447 struct nfs_fattr *fattr)
2449 struct nfs_server *server = NFS_SERVER(dir);
2451 struct nfs4_lookup_arg args = {
2452 .bitmask = server->attr_bitmask,
2453 .dir_fh = NFS_FH(dir),
2456 struct nfs4_lookup_res res = {
2461 struct rpc_message msg = {
2462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2467 nfs_fattr_init(fattr);
2469 dprintk("NFS call lookup %s\n", name->name);
2470 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2471 dprintk("NFS reply lookup: %d\n", status);
2475 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2477 memset(fh, 0, sizeof(struct nfs_fh));
2478 fattr->fsid.major = 1;
2479 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2480 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2481 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2485 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2486 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2488 struct nfs4_exception exception = { };
2493 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2495 case -NFS4ERR_BADNAME:
2497 case -NFS4ERR_MOVED:
2498 return nfs4_get_referral(dir, name, fattr, fhandle);
2499 case -NFS4ERR_WRONGSEC:
2500 nfs_fixup_secinfo_attributes(fattr, fhandle);
2502 err = nfs4_handle_exception(NFS_SERVER(dir),
2503 status, &exception);
2504 } while (exception.retry);
2508 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2510 struct nfs_server *server = NFS_SERVER(inode);
2511 struct nfs4_accessargs args = {
2512 .fh = NFS_FH(inode),
2513 .bitmask = server->attr_bitmask,
2515 struct nfs4_accessres res = {
2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2522 .rpc_cred = entry->cred,
2524 int mode = entry->mask;
2528 * Determine which access bits we want to ask for...
2530 if (mode & MAY_READ)
2531 args.access |= NFS4_ACCESS_READ;
2532 if (S_ISDIR(inode->i_mode)) {
2533 if (mode & MAY_WRITE)
2534 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2535 if (mode & MAY_EXEC)
2536 args.access |= NFS4_ACCESS_LOOKUP;
2538 if (mode & MAY_WRITE)
2539 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2540 if (mode & MAY_EXEC)
2541 args.access |= NFS4_ACCESS_EXECUTE;
2544 res.fattr = nfs_alloc_fattr();
2545 if (res.fattr == NULL)
2548 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2551 if (res.access & NFS4_ACCESS_READ)
2552 entry->mask |= MAY_READ;
2553 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2554 entry->mask |= MAY_WRITE;
2555 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2556 entry->mask |= MAY_EXEC;
2557 nfs_refresh_inode(inode, res.fattr);
2559 nfs_free_fattr(res.fattr);
2563 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2565 struct nfs4_exception exception = { };
2568 err = nfs4_handle_exception(NFS_SERVER(inode),
2569 _nfs4_proc_access(inode, entry),
2571 } while (exception.retry);
2576 * TODO: For the time being, we don't try to get any attributes
2577 * along with any of the zero-copy operations READ, READDIR,
2580 * In the case of the first three, we want to put the GETATTR
2581 * after the read-type operation -- this is because it is hard
2582 * to predict the length of a GETATTR response in v4, and thus
2583 * align the READ data correctly. This means that the GETATTR
2584 * may end up partially falling into the page cache, and we should
2585 * shift it into the 'tail' of the xdr_buf before processing.
2586 * To do this efficiently, we need to know the total length
2587 * of data received, which doesn't seem to be available outside
2590 * In the case of WRITE, we also want to put the GETATTR after
2591 * the operation -- in this case because we want to make sure
2592 * we get the post-operation mtime and size. This means that
2593 * we can't use xdr_encode_pages() as written: we need a variant
2594 * of it which would leave room in the 'tail' iovec.
2596 * Both of these changes to the XDR layer would in fact be quite
2597 * minor, but I decided to leave them for a subsequent patch.
2599 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2600 unsigned int pgbase, unsigned int pglen)
2602 struct nfs4_readlink args = {
2603 .fh = NFS_FH(inode),
2608 struct nfs4_readlink_res res;
2609 struct rpc_message msg = {
2610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2615 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2618 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2619 unsigned int pgbase, unsigned int pglen)
2621 struct nfs4_exception exception = { };
2624 err = nfs4_handle_exception(NFS_SERVER(inode),
2625 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2627 } while (exception.retry);
2633 * We will need to arrange for the VFS layer to provide an atomic open.
2634 * Until then, this create/open method is prone to inefficiency and race
2635 * conditions due to the lookup, create, and open VFS calls from sys_open()
2636 * placed on the wire.
2638 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2639 * The file will be opened again in the subsequent VFS open call
2640 * (nfs4_proc_file_open).
2642 * The open for read will just hang around to be used by any process that
2643 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2647 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2648 int flags, struct nfs_open_context *ctx)
2650 struct dentry *de = dentry;
2651 struct nfs4_state *state;
2652 struct rpc_cred *cred = NULL;
2661 sattr->ia_mode &= ~current_umask();
2662 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2664 if (IS_ERR(state)) {
2665 status = PTR_ERR(state);
2668 d_add(dentry, igrab(state->inode));
2669 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2673 nfs4_close_sync(state, fmode);
2678 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2680 struct nfs_server *server = NFS_SERVER(dir);
2681 struct nfs_removeargs args = {
2683 .name.len = name->len,
2684 .name.name = name->name,
2685 .bitmask = server->attr_bitmask,
2687 struct nfs_removeres res = {
2690 struct rpc_message msg = {
2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2695 int status = -ENOMEM;
2697 res.dir_attr = nfs_alloc_fattr();
2698 if (res.dir_attr == NULL)
2701 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2703 update_changeattr(dir, &res.cinfo);
2704 nfs_post_op_update_inode(dir, res.dir_attr);
2706 nfs_free_fattr(res.dir_attr);
2711 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2713 struct nfs4_exception exception = { };
2716 err = nfs4_handle_exception(NFS_SERVER(dir),
2717 _nfs4_proc_remove(dir, name),
2719 } while (exception.retry);
2723 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2725 struct nfs_server *server = NFS_SERVER(dir);
2726 struct nfs_removeargs *args = msg->rpc_argp;
2727 struct nfs_removeres *res = msg->rpc_resp;
2729 args->bitmask = server->cache_consistency_bitmask;
2730 res->server = server;
2731 res->seq_res.sr_slot = NULL;
2732 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2735 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2737 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2739 if (!nfs4_sequence_done(task, &res->seq_res))
2741 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2743 update_changeattr(dir, &res->cinfo);
2744 nfs_post_op_update_inode(dir, res->dir_attr);
2748 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2750 struct nfs_server *server = NFS_SERVER(dir);
2751 struct nfs_renameargs *arg = msg->rpc_argp;
2752 struct nfs_renameres *res = msg->rpc_resp;
2754 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2755 arg->bitmask = server->attr_bitmask;
2756 res->server = server;
2759 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2760 struct inode *new_dir)
2762 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2764 if (!nfs4_sequence_done(task, &res->seq_res))
2766 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2769 update_changeattr(old_dir, &res->old_cinfo);
2770 nfs_post_op_update_inode(old_dir, res->old_fattr);
2771 update_changeattr(new_dir, &res->new_cinfo);
2772 nfs_post_op_update_inode(new_dir, res->new_fattr);
2776 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2777 struct inode *new_dir, struct qstr *new_name)
2779 struct nfs_server *server = NFS_SERVER(old_dir);
2780 struct nfs_renameargs arg = {
2781 .old_dir = NFS_FH(old_dir),
2782 .new_dir = NFS_FH(new_dir),
2783 .old_name = old_name,
2784 .new_name = new_name,
2785 .bitmask = server->attr_bitmask,
2787 struct nfs_renameres res = {
2790 struct rpc_message msg = {
2791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2795 int status = -ENOMEM;
2797 res.old_fattr = nfs_alloc_fattr();
2798 res.new_fattr = nfs_alloc_fattr();
2799 if (res.old_fattr == NULL || res.new_fattr == NULL)
2802 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2804 update_changeattr(old_dir, &res.old_cinfo);
2805 nfs_post_op_update_inode(old_dir, res.old_fattr);
2806 update_changeattr(new_dir, &res.new_cinfo);
2807 nfs_post_op_update_inode(new_dir, res.new_fattr);
2810 nfs_free_fattr(res.new_fattr);
2811 nfs_free_fattr(res.old_fattr);
2815 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2816 struct inode *new_dir, struct qstr *new_name)
2818 struct nfs4_exception exception = { };
2821 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2822 _nfs4_proc_rename(old_dir, old_name,
2825 } while (exception.retry);
2829 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2831 struct nfs_server *server = NFS_SERVER(inode);
2832 struct nfs4_link_arg arg = {
2833 .fh = NFS_FH(inode),
2834 .dir_fh = NFS_FH(dir),
2836 .bitmask = server->attr_bitmask,
2838 struct nfs4_link_res res = {
2841 struct rpc_message msg = {
2842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2846 int status = -ENOMEM;
2848 res.fattr = nfs_alloc_fattr();
2849 res.dir_attr = nfs_alloc_fattr();
2850 if (res.fattr == NULL || res.dir_attr == NULL)
2853 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2855 update_changeattr(dir, &res.cinfo);
2856 nfs_post_op_update_inode(dir, res.dir_attr);
2857 nfs_post_op_update_inode(inode, res.fattr);
2860 nfs_free_fattr(res.dir_attr);
2861 nfs_free_fattr(res.fattr);
2865 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2867 struct nfs4_exception exception = { };
2870 err = nfs4_handle_exception(NFS_SERVER(inode),
2871 _nfs4_proc_link(inode, dir, name),
2873 } while (exception.retry);
2877 struct nfs4_createdata {
2878 struct rpc_message msg;
2879 struct nfs4_create_arg arg;
2880 struct nfs4_create_res res;
2882 struct nfs_fattr fattr;
2883 struct nfs_fattr dir_fattr;
2886 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2887 struct qstr *name, struct iattr *sattr, u32 ftype)
2889 struct nfs4_createdata *data;
2891 data = kzalloc(sizeof(*data), GFP_KERNEL);
2893 struct nfs_server *server = NFS_SERVER(dir);
2895 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2896 data->msg.rpc_argp = &data->arg;
2897 data->msg.rpc_resp = &data->res;
2898 data->arg.dir_fh = NFS_FH(dir);
2899 data->arg.server = server;
2900 data->arg.name = name;
2901 data->arg.attrs = sattr;
2902 data->arg.ftype = ftype;
2903 data->arg.bitmask = server->attr_bitmask;
2904 data->res.server = server;
2905 data->res.fh = &data->fh;
2906 data->res.fattr = &data->fattr;
2907 data->res.dir_fattr = &data->dir_fattr;
2908 nfs_fattr_init(data->res.fattr);
2909 nfs_fattr_init(data->res.dir_fattr);
2914 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2916 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2917 &data->arg.seq_args, &data->res.seq_res, 1);
2919 update_changeattr(dir, &data->res.dir_cinfo);
2920 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2921 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2926 static void nfs4_free_createdata(struct nfs4_createdata *data)
2931 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2932 struct page *page, unsigned int len, struct iattr *sattr)
2934 struct nfs4_createdata *data;
2935 int status = -ENAMETOOLONG;
2937 if (len > NFS4_MAXPATHLEN)
2941 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2945 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2946 data->arg.u.symlink.pages = &page;
2947 data->arg.u.symlink.len = len;
2949 status = nfs4_do_create(dir, dentry, data);
2951 nfs4_free_createdata(data);
2956 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2957 struct page *page, unsigned int len, struct iattr *sattr)
2959 struct nfs4_exception exception = { };
2962 err = nfs4_handle_exception(NFS_SERVER(dir),
2963 _nfs4_proc_symlink(dir, dentry, page,
2966 } while (exception.retry);
2970 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2971 struct iattr *sattr)
2973 struct nfs4_createdata *data;
2974 int status = -ENOMEM;
2976 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2980 status = nfs4_do_create(dir, dentry, data);
2982 nfs4_free_createdata(data);
2987 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2988 struct iattr *sattr)
2990 struct nfs4_exception exception = { };
2993 sattr->ia_mode &= ~current_umask();
2995 err = nfs4_handle_exception(NFS_SERVER(dir),
2996 _nfs4_proc_mkdir(dir, dentry, sattr),
2998 } while (exception.retry);
3002 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3003 u64 cookie, struct page **pages, unsigned int count, int plus)
3005 struct inode *dir = dentry->d_inode;
3006 struct nfs4_readdir_arg args = {
3011 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3014 struct nfs4_readdir_res res;
3015 struct rpc_message msg = {
3016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3023 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3024 dentry->d_parent->d_name.name,
3025 dentry->d_name.name,
3026 (unsigned long long)cookie);
3027 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3028 res.pgbase = args.pgbase;
3029 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3031 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3032 status += args.pgbase;
3035 nfs_invalidate_atime(dir);
3037 dprintk("%s: returns %d\n", __func__, status);
3041 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3042 u64 cookie, struct page **pages, unsigned int count, int plus)
3044 struct nfs4_exception exception = { };
3047 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3048 _nfs4_proc_readdir(dentry, cred, cookie,
3049 pages, count, plus),
3051 } while (exception.retry);
3055 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3056 struct iattr *sattr, dev_t rdev)
3058 struct nfs4_createdata *data;
3059 int mode = sattr->ia_mode;
3060 int status = -ENOMEM;
3062 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3063 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3065 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3070 data->arg.ftype = NF4FIFO;
3071 else if (S_ISBLK(mode)) {
3072 data->arg.ftype = NF4BLK;
3073 data->arg.u.device.specdata1 = MAJOR(rdev);
3074 data->arg.u.device.specdata2 = MINOR(rdev);
3076 else if (S_ISCHR(mode)) {
3077 data->arg.ftype = NF4CHR;
3078 data->arg.u.device.specdata1 = MAJOR(rdev);
3079 data->arg.u.device.specdata2 = MINOR(rdev);
3082 status = nfs4_do_create(dir, dentry, data);
3084 nfs4_free_createdata(data);
3089 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3090 struct iattr *sattr, dev_t rdev)
3092 struct nfs4_exception exception = { };
3095 sattr->ia_mode &= ~current_umask();
3097 err = nfs4_handle_exception(NFS_SERVER(dir),
3098 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3100 } while (exception.retry);
3104 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3105 struct nfs_fsstat *fsstat)
3107 struct nfs4_statfs_arg args = {
3109 .bitmask = server->attr_bitmask,
3111 struct nfs4_statfs_res res = {
3114 struct rpc_message msg = {
3115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3120 nfs_fattr_init(fsstat->fattr);
3121 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3124 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3126 struct nfs4_exception exception = { };
3129 err = nfs4_handle_exception(server,
3130 _nfs4_proc_statfs(server, fhandle, fsstat),
3132 } while (exception.retry);
3136 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3137 struct nfs_fsinfo *fsinfo)
3139 struct nfs4_fsinfo_arg args = {
3141 .bitmask = server->attr_bitmask,
3143 struct nfs4_fsinfo_res res = {
3146 struct rpc_message msg = {
3147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3152 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3155 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3157 struct nfs4_exception exception = { };
3161 err = nfs4_handle_exception(server,
3162 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3164 } while (exception.retry);
3168 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3170 nfs_fattr_init(fsinfo->fattr);
3171 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3174 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3175 struct nfs_pathconf *pathconf)
3177 struct nfs4_pathconf_arg args = {
3179 .bitmask = server->attr_bitmask,
3181 struct nfs4_pathconf_res res = {
3182 .pathconf = pathconf,
3184 struct rpc_message msg = {
3185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3190 /* None of the pathconf attributes are mandatory to implement */
3191 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3192 memset(pathconf, 0, sizeof(*pathconf));
3196 nfs_fattr_init(pathconf->fattr);
3197 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3200 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3201 struct nfs_pathconf *pathconf)
3203 struct nfs4_exception exception = { };
3207 err = nfs4_handle_exception(server,
3208 _nfs4_proc_pathconf(server, fhandle, pathconf),
3210 } while (exception.retry);
3214 void __nfs4_read_done_cb(struct nfs_read_data *data)
3216 nfs_invalidate_atime(data->inode);
3219 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3221 struct nfs_server *server = NFS_SERVER(data->inode);
3223 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3224 rpc_restart_call_prepare(task);
3228 __nfs4_read_done_cb(data);
3229 if (task->tk_status > 0)
3230 renew_lease(server, data->timestamp);
3234 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3237 dprintk("--> %s\n", __func__);
3239 if (!nfs4_sequence_done(task, &data->res.seq_res))
3242 return data->read_done_cb ? data->read_done_cb(task, data) :
3243 nfs4_read_done_cb(task, data);
3246 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3248 data->timestamp = jiffies;
3249 data->read_done_cb = nfs4_read_done_cb;
3250 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3253 /* Reset the the nfs_read_data to send the read to the MDS. */
3254 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3256 dprintk("%s Reset task for i/o through\n", __func__);
3257 put_lseg(data->lseg);
3259 /* offsets will differ in the dense stripe case */
3260 data->args.offset = data->mds_offset;
3261 data->ds_clp = NULL;
3262 data->args.fh = NFS_FH(data->inode);
3263 data->read_done_cb = nfs4_read_done_cb;
3264 task->tk_ops = data->mds_ops;
3265 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3267 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3269 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3271 struct inode *inode = data->inode;
3273 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3274 rpc_restart_call_prepare(task);
3277 if (task->tk_status >= 0) {
3278 renew_lease(NFS_SERVER(inode), data->timestamp);
3279 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3284 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3286 if (!nfs4_sequence_done(task, &data->res.seq_res))
3288 return data->write_done_cb ? data->write_done_cb(task, data) :
3289 nfs4_write_done_cb(task, data);
3292 /* Reset the the nfs_write_data to send the write to the MDS. */
3293 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3295 dprintk("%s Reset task for i/o through\n", __func__);
3296 put_lseg(data->lseg);
3298 data->ds_clp = NULL;
3299 data->write_done_cb = nfs4_write_done_cb;
3300 data->args.fh = NFS_FH(data->inode);
3301 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3302 data->args.offset = data->mds_offset;
3303 data->res.fattr = &data->fattr;
3304 task->tk_ops = data->mds_ops;
3305 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3307 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3309 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3311 struct nfs_server *server = NFS_SERVER(data->inode);
3314 data->args.bitmask = NULL;
3315 data->res.fattr = NULL;
3317 data->args.bitmask = server->cache_consistency_bitmask;
3318 if (!data->write_done_cb)
3319 data->write_done_cb = nfs4_write_done_cb;
3320 data->res.server = server;
3321 data->timestamp = jiffies;
3323 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3326 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3328 struct inode *inode = data->inode;
3330 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3331 rpc_restart_call_prepare(task);
3334 nfs_refresh_inode(inode, data->res.fattr);
3338 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3340 if (!nfs4_sequence_done(task, &data->res.seq_res))
3342 return data->write_done_cb(task, data);
3345 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3347 struct nfs_server *server = NFS_SERVER(data->inode);
3350 data->args.bitmask = NULL;
3351 data->res.fattr = NULL;
3353 data->args.bitmask = server->cache_consistency_bitmask;
3354 if (!data->write_done_cb)
3355 data->write_done_cb = nfs4_commit_done_cb;
3356 data->res.server = server;
3357 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3360 struct nfs4_renewdata {
3361 struct nfs_client *client;
3362 unsigned long timestamp;
3366 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3367 * standalone procedure for queueing an asynchronous RENEW.
3369 static void nfs4_renew_release(void *calldata)
3371 struct nfs4_renewdata *data = calldata;
3372 struct nfs_client *clp = data->client;
3374 if (atomic_read(&clp->cl_count) > 1)
3375 nfs4_schedule_state_renewal(clp);
3376 nfs_put_client(clp);
3380 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3382 struct nfs4_renewdata *data = calldata;
3383 struct nfs_client *clp = data->client;
3384 unsigned long timestamp = data->timestamp;
3386 if (task->tk_status < 0) {
3387 /* Unless we're shutting down, schedule state recovery! */
3388 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3390 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3391 nfs4_schedule_lease_recovery(clp);
3394 nfs4_schedule_path_down_recovery(clp);
3396 do_renew_lease(clp, timestamp);
3399 static const struct rpc_call_ops nfs4_renew_ops = {
3400 .rpc_call_done = nfs4_renew_done,
3401 .rpc_release = nfs4_renew_release,
3404 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3406 struct rpc_message msg = {
3407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3411 struct nfs4_renewdata *data;
3413 if (renew_flags == 0)
3415 if (!atomic_inc_not_zero(&clp->cl_count))
3417 data = kmalloc(sizeof(*data), GFP_NOFS);
3421 data->timestamp = jiffies;
3422 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3423 &nfs4_renew_ops, data);
3426 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3428 struct rpc_message msg = {
3429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3433 unsigned long now = jiffies;
3436 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3439 do_renew_lease(clp, now);
3443 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3445 return (server->caps & NFS_CAP_ACLS)
3446 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3447 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3450 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3451 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3454 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3456 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3457 struct page **pages, unsigned int *pgbase)
3459 struct page *newpage, **spages;
3465 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3466 newpage = alloc_page(GFP_KERNEL);
3468 if (newpage == NULL)
3470 memcpy(page_address(newpage), buf, len);
3475 } while (buflen != 0);
3481 __free_page(spages[rc-1]);
3485 struct nfs4_cached_acl {
3491 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3493 struct nfs_inode *nfsi = NFS_I(inode);
3495 spin_lock(&inode->i_lock);
3496 kfree(nfsi->nfs4_acl);
3497 nfsi->nfs4_acl = acl;
3498 spin_unlock(&inode->i_lock);
3501 static void nfs4_zap_acl_attr(struct inode *inode)
3503 nfs4_set_cached_acl(inode, NULL);
3506 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3508 struct nfs_inode *nfsi = NFS_I(inode);
3509 struct nfs4_cached_acl *acl;
3512 spin_lock(&inode->i_lock);
3513 acl = nfsi->nfs4_acl;
3516 if (buf == NULL) /* user is just asking for length */
3518 if (acl->cached == 0)
3520 ret = -ERANGE; /* see getxattr(2) man page */
3521 if (acl->len > buflen)
3523 memcpy(buf, acl->data, acl->len);
3527 spin_unlock(&inode->i_lock);
3531 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3533 struct nfs4_cached_acl *acl;
3535 if (pages && acl_len <= PAGE_SIZE) {
3536 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3540 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3542 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3549 nfs4_set_cached_acl(inode, acl);
3553 * The getxattr API returns the required buffer length when called with a
3554 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3555 * the required buf. On a NULL buf, we send a page of data to the server
3556 * guessing that the ACL request can be serviced by a page. If so, we cache
3557 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3558 * the cache. If not so, we throw away the page, and cache the required
3559 * length. The next getxattr call will then produce another round trip to
3560 * the server, this time with the input buf of the required size.
3562 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3564 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3565 struct nfs_getaclargs args = {
3566 .fh = NFS_FH(inode),
3570 struct nfs_getaclres res = {
3573 struct rpc_message msg = {
3574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3578 int ret = -ENOMEM, npages, i, acl_len = 0;
3580 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3581 /* As long as we're doing a round trip to the server anyway,
3582 * let's be prepared for a page of acl data. */
3586 /* Add an extra page to handle the bitmap returned */
3589 for (i = 0; i < npages; i++) {
3590 pages[i] = alloc_page(GFP_KERNEL);
3595 /* for decoding across pages */
3596 res.acl_scratch = alloc_page(GFP_KERNEL);
3597 if (!res.acl_scratch)
3600 args.acl_len = npages * PAGE_SIZE;
3601 args.acl_pgbase = 0;
3603 /* Let decode_getfacl know not to fail if the ACL data is larger than
3604 * the page we send as a guess */
3606 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3608 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3609 __func__, buf, buflen, npages, args.acl_len);
3610 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3611 &msg, &args.seq_args, &res.seq_res, 0);
3615 acl_len = res.acl_len - res.acl_data_offset;
3616 if (acl_len > args.acl_len)
3617 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3619 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3623 if (acl_len > buflen)
3625 _copy_from_pages(buf, pages, res.acl_data_offset,
3630 for (i = 0; i < npages; i++)
3632 __free_page(pages[i]);
3633 if (res.acl_scratch)
3634 __free_page(res.acl_scratch);
3638 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3640 struct nfs4_exception exception = { };
3643 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3646 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3647 } while (exception.retry);
3651 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3653 struct nfs_server *server = NFS_SERVER(inode);
3656 if (!nfs4_server_supports_acls(server))
3658 ret = nfs_revalidate_inode(server, inode);
3661 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3662 nfs_zap_acl_cache(inode);
3663 ret = nfs4_read_cached_acl(inode, buf, buflen);
3665 /* -ENOENT is returned if there is no ACL or if there is an ACL
3666 * but no cached acl data, just the acl length */
3668 return nfs4_get_acl_uncached(inode, buf, buflen);
3671 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3673 struct nfs_server *server = NFS_SERVER(inode);
3674 struct page *pages[NFS4ACL_MAXPAGES];
3675 struct nfs_setaclargs arg = {
3676 .fh = NFS_FH(inode),
3680 struct nfs_setaclres res;
3681 struct rpc_message msg = {
3682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3688 if (!nfs4_server_supports_acls(server))
3690 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3693 nfs_inode_return_delegation(inode);
3694 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3697 * Free each page after tx, so the only ref left is
3698 * held by the network stack
3701 put_page(pages[i-1]);
3704 * Acl update can result in inode attribute update.
3705 * so mark the attribute cache invalid.
3707 spin_lock(&inode->i_lock);
3708 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3709 spin_unlock(&inode->i_lock);
3710 nfs_access_zap_cache(inode);
3711 nfs_zap_acl_cache(inode);
3715 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3717 struct nfs4_exception exception = { };
3720 err = nfs4_handle_exception(NFS_SERVER(inode),
3721 __nfs4_proc_set_acl(inode, buf, buflen),
3723 } while (exception.retry);
3728 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3730 struct nfs_client *clp = server->nfs_client;
3732 if (task->tk_status >= 0)
3734 switch(task->tk_status) {
3735 case -NFS4ERR_DELEG_REVOKED:
3736 case -NFS4ERR_ADMIN_REVOKED:
3737 case -NFS4ERR_BAD_STATEID:
3739 nfs_remove_bad_delegation(state->inode);
3740 case -NFS4ERR_OPENMODE:
3743 nfs4_schedule_stateid_recovery(server, state);
3744 goto wait_on_recovery;
3745 case -NFS4ERR_EXPIRED:
3747 nfs4_schedule_stateid_recovery(server, state);
3748 case -NFS4ERR_STALE_STATEID:
3749 case -NFS4ERR_STALE_CLIENTID:
3750 nfs4_schedule_lease_recovery(clp);
3751 goto wait_on_recovery;
3752 #if defined(CONFIG_NFS_V4_1)
3753 case -NFS4ERR_BADSESSION:
3754 case -NFS4ERR_BADSLOT:
3755 case -NFS4ERR_BAD_HIGH_SLOT:
3756 case -NFS4ERR_DEADSESSION:
3757 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3758 case -NFS4ERR_SEQ_FALSE_RETRY:
3759 case -NFS4ERR_SEQ_MISORDERED:
3760 dprintk("%s ERROR %d, Reset session\n", __func__,
3762 nfs4_schedule_session_recovery(clp->cl_session);
3763 task->tk_status = 0;
3765 #endif /* CONFIG_NFS_V4_1 */
3766 case -NFS4ERR_DELAY:
3767 nfs_inc_server_stats(server, NFSIOS_DELAY);
3768 case -NFS4ERR_GRACE:
3770 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3771 task->tk_status = 0;
3773 case -NFS4ERR_RETRY_UNCACHED_REP:
3774 case -NFS4ERR_OLD_STATEID:
3775 task->tk_status = 0;
3778 task->tk_status = nfs4_map_errors(task->tk_status);
3781 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3782 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3783 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3784 task->tk_status = 0;
3788 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3789 unsigned short port, struct rpc_cred *cred,
3790 struct nfs4_setclientid_res *res)
3792 nfs4_verifier sc_verifier;
3793 struct nfs4_setclientid setclientid = {
3794 .sc_verifier = &sc_verifier,
3796 .sc_cb_ident = clp->cl_cb_ident,
3798 struct rpc_message msg = {
3799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3800 .rpc_argp = &setclientid,
3808 p = (__be32*)sc_verifier.data;
3809 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3810 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3813 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3814 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3816 rpc_peeraddr2str(clp->cl_rpcclient,
3818 rpc_peeraddr2str(clp->cl_rpcclient,
3820 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3821 clp->cl_id_uniquifier);
3822 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3823 sizeof(setclientid.sc_netid),
3824 rpc_peeraddr2str(clp->cl_rpcclient,
3825 RPC_DISPLAY_NETID));
3826 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3827 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3828 clp->cl_ipaddr, port >> 8, port & 255);
3830 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3831 if (status != -NFS4ERR_CLID_INUSE)
3834 ++clp->cl_id_uniquifier;
3838 ssleep(clp->cl_lease_time / HZ + 1);
3843 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3844 struct nfs4_setclientid_res *arg,
3845 struct rpc_cred *cred)
3847 struct nfs_fsinfo fsinfo;
3848 struct rpc_message msg = {
3849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3851 .rpc_resp = &fsinfo,
3858 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3860 spin_lock(&clp->cl_lock);
3861 clp->cl_lease_time = fsinfo.lease_time * HZ;
3862 clp->cl_last_renewal = now;
3863 spin_unlock(&clp->cl_lock);
3868 struct nfs4_delegreturndata {
3869 struct nfs4_delegreturnargs args;
3870 struct nfs4_delegreturnres res;
3872 nfs4_stateid stateid;
3873 unsigned long timestamp;
3874 struct nfs_fattr fattr;
3878 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3880 struct nfs4_delegreturndata *data = calldata;
3882 if (!nfs4_sequence_done(task, &data->res.seq_res))
3885 switch (task->tk_status) {
3886 case -NFS4ERR_STALE_STATEID:
3887 case -NFS4ERR_EXPIRED:
3889 renew_lease(data->res.server, data->timestamp);
3892 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3894 rpc_restart_call_prepare(task);
3898 data->rpc_status = task->tk_status;
3901 static void nfs4_delegreturn_release(void *calldata)
3906 #if defined(CONFIG_NFS_V4_1)
3907 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3909 struct nfs4_delegreturndata *d_data;
3911 d_data = (struct nfs4_delegreturndata *)data;
3913 if (nfs4_setup_sequence(d_data->res.server,
3914 &d_data->args.seq_args,
3915 &d_data->res.seq_res, 1, task))
3917 rpc_call_start(task);
3919 #endif /* CONFIG_NFS_V4_1 */
3921 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3922 #if defined(CONFIG_NFS_V4_1)
3923 .rpc_call_prepare = nfs4_delegreturn_prepare,
3924 #endif /* CONFIG_NFS_V4_1 */
3925 .rpc_call_done = nfs4_delegreturn_done,
3926 .rpc_release = nfs4_delegreturn_release,
3929 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3931 struct nfs4_delegreturndata *data;
3932 struct nfs_server *server = NFS_SERVER(inode);
3933 struct rpc_task *task;
3934 struct rpc_message msg = {
3935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3938 struct rpc_task_setup task_setup_data = {
3939 .rpc_client = server->client,
3940 .rpc_message = &msg,
3941 .callback_ops = &nfs4_delegreturn_ops,
3942 .flags = RPC_TASK_ASYNC,
3946 data = kzalloc(sizeof(*data), GFP_NOFS);
3949 data->args.fhandle = &data->fh;
3950 data->args.stateid = &data->stateid;
3951 data->args.bitmask = server->attr_bitmask;
3952 nfs_copy_fh(&data->fh, NFS_FH(inode));
3953 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3954 data->res.fattr = &data->fattr;
3955 data->res.server = server;
3956 nfs_fattr_init(data->res.fattr);
3957 data->timestamp = jiffies;
3958 data->rpc_status = 0;
3960 task_setup_data.callback_data = data;
3961 msg.rpc_argp = &data->args;
3962 msg.rpc_resp = &data->res;
3963 task = rpc_run_task(&task_setup_data);
3965 return PTR_ERR(task);
3968 status = nfs4_wait_for_completion_rpc_task(task);
3971 status = data->rpc_status;
3974 nfs_refresh_inode(inode, &data->fattr);
3980 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3982 struct nfs_server *server = NFS_SERVER(inode);
3983 struct nfs4_exception exception = { };
3986 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3988 case -NFS4ERR_STALE_STATEID:
3989 case -NFS4ERR_EXPIRED:
3993 err = nfs4_handle_exception(server, err, &exception);
3994 } while (exception.retry);
3998 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3999 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4002 * sleep, with exponential backoff, and retry the LOCK operation.
4004 static unsigned long
4005 nfs4_set_lock_task_retry(unsigned long timeout)
4007 schedule_timeout_killable(timeout);
4009 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4010 return NFS4_LOCK_MAXTIMEOUT;
4014 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4016 struct inode *inode = state->inode;
4017 struct nfs_server *server = NFS_SERVER(inode);
4018 struct nfs_client *clp = server->nfs_client;
4019 struct nfs_lockt_args arg = {
4020 .fh = NFS_FH(inode),
4023 struct nfs_lockt_res res = {
4026 struct rpc_message msg = {
4027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4030 .rpc_cred = state->owner->so_cred,
4032 struct nfs4_lock_state *lsp;
4035 arg.lock_owner.clientid = clp->cl_clientid;
4036 status = nfs4_set_lock_state(state, request);
4039 lsp = request->fl_u.nfs4_fl.owner;
4040 arg.lock_owner.id = lsp->ls_id.id;
4041 arg.lock_owner.s_dev = server->s_dev;
4042 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4045 request->fl_type = F_UNLCK;
4047 case -NFS4ERR_DENIED:
4050 request->fl_ops->fl_release_private(request);
4055 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4057 struct nfs4_exception exception = { };
4061 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4062 _nfs4_proc_getlk(state, cmd, request),
4064 } while (exception.retry);
4068 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4071 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4073 res = posix_lock_file_wait(file, fl);
4076 res = flock_lock_file_wait(file, fl);
4084 struct nfs4_unlockdata {
4085 struct nfs_locku_args arg;
4086 struct nfs_locku_res res;
4087 struct nfs4_lock_state *lsp;
4088 struct nfs_open_context *ctx;
4089 struct file_lock fl;
4090 const struct nfs_server *server;
4091 unsigned long timestamp;
4094 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4095 struct nfs_open_context *ctx,
4096 struct nfs4_lock_state *lsp,
4097 struct nfs_seqid *seqid)
4099 struct nfs4_unlockdata *p;
4100 struct inode *inode = lsp->ls_state->inode;
4102 p = kzalloc(sizeof(*p), GFP_NOFS);
4105 p->arg.fh = NFS_FH(inode);
4107 p->arg.seqid = seqid;
4108 p->res.seqid = seqid;
4109 p->arg.stateid = &lsp->ls_stateid;
4111 atomic_inc(&lsp->ls_count);
4112 /* Ensure we don't close file until we're done freeing locks! */
4113 p->ctx = get_nfs_open_context(ctx);
4114 memcpy(&p->fl, fl, sizeof(p->fl));
4115 p->server = NFS_SERVER(inode);
4119 static void nfs4_locku_release_calldata(void *data)
4121 struct nfs4_unlockdata *calldata = data;
4122 nfs_free_seqid(calldata->arg.seqid);
4123 nfs4_put_lock_state(calldata->lsp);
4124 put_nfs_open_context(calldata->ctx);
4128 static void nfs4_locku_done(struct rpc_task *task, void *data)
4130 struct nfs4_unlockdata *calldata = data;
4132 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4134 switch (task->tk_status) {
4136 memcpy(calldata->lsp->ls_stateid.data,
4137 calldata->res.stateid.data,
4138 sizeof(calldata->lsp->ls_stateid.data));
4139 renew_lease(calldata->server, calldata->timestamp);
4141 case -NFS4ERR_BAD_STATEID:
4142 case -NFS4ERR_OLD_STATEID:
4143 case -NFS4ERR_STALE_STATEID:
4144 case -NFS4ERR_EXPIRED:
4147 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4148 rpc_restart_call_prepare(task);
4152 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4154 struct nfs4_unlockdata *calldata = data;
4156 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4158 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4159 /* Note: exit _without_ running nfs4_locku_done */
4160 task->tk_action = NULL;
4163 calldata->timestamp = jiffies;
4164 if (nfs4_setup_sequence(calldata->server,
4165 &calldata->arg.seq_args,
4166 &calldata->res.seq_res, 1, task))
4168 rpc_call_start(task);
4171 static const struct rpc_call_ops nfs4_locku_ops = {
4172 .rpc_call_prepare = nfs4_locku_prepare,
4173 .rpc_call_done = nfs4_locku_done,
4174 .rpc_release = nfs4_locku_release_calldata,
4177 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4178 struct nfs_open_context *ctx,
4179 struct nfs4_lock_state *lsp,
4180 struct nfs_seqid *seqid)
4182 struct nfs4_unlockdata *data;
4183 struct rpc_message msg = {
4184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4185 .rpc_cred = ctx->cred,
4187 struct rpc_task_setup task_setup_data = {
4188 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4189 .rpc_message = &msg,
4190 .callback_ops = &nfs4_locku_ops,
4191 .workqueue = nfsiod_workqueue,
4192 .flags = RPC_TASK_ASYNC,
4195 /* Ensure this is an unlock - when canceling a lock, the
4196 * canceled lock is passed in, and it won't be an unlock.
4198 fl->fl_type = F_UNLCK;
4200 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4202 nfs_free_seqid(seqid);
4203 return ERR_PTR(-ENOMEM);
4206 msg.rpc_argp = &data->arg;
4207 msg.rpc_resp = &data->res;
4208 task_setup_data.callback_data = data;
4209 return rpc_run_task(&task_setup_data);
4212 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4214 struct nfs_inode *nfsi = NFS_I(state->inode);
4215 struct nfs_seqid *seqid;
4216 struct nfs4_lock_state *lsp;
4217 struct rpc_task *task;
4219 unsigned char fl_flags = request->fl_flags;
4221 status = nfs4_set_lock_state(state, request);
4222 /* Unlock _before_ we do the RPC call */
4223 request->fl_flags |= FL_EXISTS;
4224 down_read(&nfsi->rwsem);
4225 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4226 up_read(&nfsi->rwsem);
4229 up_read(&nfsi->rwsem);
4232 /* Is this a delegated lock? */
4233 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4235 lsp = request->fl_u.nfs4_fl.owner;
4236 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4240 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4241 status = PTR_ERR(task);
4244 status = nfs4_wait_for_completion_rpc_task(task);
4247 request->fl_flags = fl_flags;
4251 struct nfs4_lockdata {
4252 struct nfs_lock_args arg;
4253 struct nfs_lock_res res;
4254 struct nfs4_lock_state *lsp;
4255 struct nfs_open_context *ctx;
4256 struct file_lock fl;
4257 unsigned long timestamp;
4260 struct nfs_server *server;
4263 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4264 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4267 struct nfs4_lockdata *p;
4268 struct inode *inode = lsp->ls_state->inode;
4269 struct nfs_server *server = NFS_SERVER(inode);
4271 p = kzalloc(sizeof(*p), gfp_mask);
4275 p->arg.fh = NFS_FH(inode);
4277 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4278 if (p->arg.open_seqid == NULL)
4280 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4281 if (p->arg.lock_seqid == NULL)
4282 goto out_free_seqid;
4283 p->arg.lock_stateid = &lsp->ls_stateid;
4284 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4285 p->arg.lock_owner.id = lsp->ls_id.id;
4286 p->arg.lock_owner.s_dev = server->s_dev;
4287 p->res.lock_seqid = p->arg.lock_seqid;
4290 atomic_inc(&lsp->ls_count);
4291 p->ctx = get_nfs_open_context(ctx);
4292 memcpy(&p->fl, fl, sizeof(p->fl));
4295 nfs_free_seqid(p->arg.open_seqid);
4301 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4303 struct nfs4_lockdata *data = calldata;
4304 struct nfs4_state *state = data->lsp->ls_state;
4306 dprintk("%s: begin!\n", __func__);
4307 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4309 /* Do we need to do an open_to_lock_owner? */
4310 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4311 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4313 data->arg.open_stateid = &state->stateid;
4314 data->arg.new_lock_owner = 1;
4315 data->res.open_seqid = data->arg.open_seqid;
4317 data->arg.new_lock_owner = 0;
4318 data->timestamp = jiffies;
4319 if (nfs4_setup_sequence(data->server,
4320 &data->arg.seq_args,
4321 &data->res.seq_res, 1, task))
4323 rpc_call_start(task);
4324 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4327 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4329 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4330 nfs4_lock_prepare(task, calldata);
4333 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4335 struct nfs4_lockdata *data = calldata;
4337 dprintk("%s: begin!\n", __func__);
4339 if (!nfs4_sequence_done(task, &data->res.seq_res))
4342 data->rpc_status = task->tk_status;
4343 if (data->arg.new_lock_owner != 0) {
4344 if (data->rpc_status == 0)
4345 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4349 if (data->rpc_status == 0) {
4350 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4351 sizeof(data->lsp->ls_stateid.data));
4352 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4353 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4356 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4359 static void nfs4_lock_release(void *calldata)
4361 struct nfs4_lockdata *data = calldata;
4363 dprintk("%s: begin!\n", __func__);
4364 nfs_free_seqid(data->arg.open_seqid);
4365 if (data->cancelled != 0) {
4366 struct rpc_task *task;
4367 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4368 data->arg.lock_seqid);
4370 rpc_put_task_async(task);
4371 dprintk("%s: cancelling lock!\n", __func__);
4373 nfs_free_seqid(data->arg.lock_seqid);
4374 nfs4_put_lock_state(data->lsp);
4375 put_nfs_open_context(data->ctx);
4377 dprintk("%s: done!\n", __func__);
4380 static const struct rpc_call_ops nfs4_lock_ops = {
4381 .rpc_call_prepare = nfs4_lock_prepare,
4382 .rpc_call_done = nfs4_lock_done,
4383 .rpc_release = nfs4_lock_release,
4386 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4387 .rpc_call_prepare = nfs4_recover_lock_prepare,
4388 .rpc_call_done = nfs4_lock_done,
4389 .rpc_release = nfs4_lock_release,
4392 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4395 case -NFS4ERR_ADMIN_REVOKED:
4396 case -NFS4ERR_BAD_STATEID:
4397 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4398 if (new_lock_owner != 0 ||
4399 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4400 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4402 case -NFS4ERR_STALE_STATEID:
4403 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4404 case -NFS4ERR_EXPIRED:
4405 nfs4_schedule_lease_recovery(server->nfs_client);
4409 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4411 struct nfs4_lockdata *data;
4412 struct rpc_task *task;
4413 struct rpc_message msg = {
4414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4415 .rpc_cred = state->owner->so_cred,
4417 struct rpc_task_setup task_setup_data = {
4418 .rpc_client = NFS_CLIENT(state->inode),
4419 .rpc_message = &msg,
4420 .callback_ops = &nfs4_lock_ops,
4421 .workqueue = nfsiod_workqueue,
4422 .flags = RPC_TASK_ASYNC,
4426 dprintk("%s: begin!\n", __func__);
4427 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4428 fl->fl_u.nfs4_fl.owner,
4429 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4433 data->arg.block = 1;
4434 if (recovery_type > NFS_LOCK_NEW) {
4435 if (recovery_type == NFS_LOCK_RECLAIM)
4436 data->arg.reclaim = NFS_LOCK_RECLAIM;
4437 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4439 msg.rpc_argp = &data->arg;
4440 msg.rpc_resp = &data->res;
4441 task_setup_data.callback_data = data;
4442 task = rpc_run_task(&task_setup_data);
4444 return PTR_ERR(task);
4445 ret = nfs4_wait_for_completion_rpc_task(task);
4447 ret = data->rpc_status;
4449 nfs4_handle_setlk_error(data->server, data->lsp,
4450 data->arg.new_lock_owner, ret);
4452 data->cancelled = 1;
4454 dprintk("%s: done, ret = %d!\n", __func__, ret);
4458 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4460 struct nfs_server *server = NFS_SERVER(state->inode);
4461 struct nfs4_exception exception = {
4462 .inode = state->inode,
4467 /* Cache the lock if possible... */
4468 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4470 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4471 if (err != -NFS4ERR_DELAY)
4473 nfs4_handle_exception(server, err, &exception);
4474 } while (exception.retry);
4478 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4480 struct nfs_server *server = NFS_SERVER(state->inode);
4481 struct nfs4_exception exception = {
4482 .inode = state->inode,
4486 err = nfs4_set_lock_state(state, request);
4490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4492 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4496 case -NFS4ERR_GRACE:
4497 case -NFS4ERR_DELAY:
4498 nfs4_handle_exception(server, err, &exception);
4501 } while (exception.retry);
4506 #if defined(CONFIG_NFS_V4_1)
4507 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4510 struct nfs_server *server = NFS_SERVER(state->inode);
4512 status = nfs41_test_stateid(server, state);
4513 if (status == NFS_OK)
4515 nfs41_free_stateid(server, state);
4516 return nfs4_lock_expired(state, request);
4520 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4522 struct nfs_inode *nfsi = NFS_I(state->inode);
4523 unsigned char fl_flags = request->fl_flags;
4524 int status = -ENOLCK;
4526 if ((fl_flags & FL_POSIX) &&
4527 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4529 /* Is this a delegated open? */
4530 status = nfs4_set_lock_state(state, request);
4533 request->fl_flags |= FL_ACCESS;
4534 status = do_vfs_lock(request->fl_file, request);
4537 down_read(&nfsi->rwsem);
4538 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4539 /* Yes: cache locks! */
4540 /* ...but avoid races with delegation recall... */
4541 request->fl_flags = fl_flags & ~FL_SLEEP;
4542 status = do_vfs_lock(request->fl_file, request);
4545 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4548 /* Note: we always want to sleep here! */
4549 request->fl_flags = fl_flags | FL_SLEEP;
4550 if (do_vfs_lock(request->fl_file, request) < 0)
4551 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4553 up_read(&nfsi->rwsem);
4555 request->fl_flags = fl_flags;
4559 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4561 struct nfs4_exception exception = {
4563 .inode = state->inode,
4568 err = _nfs4_proc_setlk(state, cmd, request);
4569 if (err == -NFS4ERR_DENIED)
4571 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4573 } while (exception.retry);
4578 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4580 struct nfs_open_context *ctx;
4581 struct nfs4_state *state;
4582 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4585 /* verify open state */
4586 ctx = nfs_file_open_context(filp);
4589 if (request->fl_start < 0 || request->fl_end < 0)
4592 if (IS_GETLK(cmd)) {
4594 return nfs4_proc_getlk(state, F_GETLK, request);
4598 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4601 if (request->fl_type == F_UNLCK) {
4603 return nfs4_proc_unlck(state, cmd, request);
4610 * Don't rely on the VFS having checked the file open mode,
4611 * since it won't do this for flock() locks.
4613 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4615 if (!(filp->f_mode & FMODE_READ))
4619 if (!(filp->f_mode & FMODE_WRITE))
4624 status = nfs4_proc_setlk(state, cmd, request);
4625 if ((status != -EAGAIN) || IS_SETLK(cmd))
4627 timeout = nfs4_set_lock_task_retry(timeout);
4628 status = -ERESTARTSYS;
4631 } while(status < 0);
4635 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4637 struct nfs_server *server = NFS_SERVER(state->inode);
4638 struct nfs4_exception exception = { };
4641 err = nfs4_set_lock_state(state, fl);
4645 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4648 printk(KERN_ERR "%s: unhandled error %d.\n",
4653 case -NFS4ERR_EXPIRED:
4654 nfs4_schedule_stateid_recovery(server, state);
4655 case -NFS4ERR_STALE_CLIENTID:
4656 case -NFS4ERR_STALE_STATEID:
4657 nfs4_schedule_lease_recovery(server->nfs_client);
4659 case -NFS4ERR_BADSESSION:
4660 case -NFS4ERR_BADSLOT:
4661 case -NFS4ERR_BAD_HIGH_SLOT:
4662 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4663 case -NFS4ERR_DEADSESSION:
4664 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4668 * The show must go on: exit, but mark the
4669 * stateid as needing recovery.
4671 case -NFS4ERR_DELEG_REVOKED:
4672 case -NFS4ERR_ADMIN_REVOKED:
4673 case -NFS4ERR_BAD_STATEID:
4674 case -NFS4ERR_OPENMODE:
4675 nfs4_schedule_stateid_recovery(server, state);
4680 * User RPCSEC_GSS context has expired.
4681 * We cannot recover this stateid now, so
4682 * skip it and allow recovery thread to
4688 case -NFS4ERR_DENIED:
4689 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4692 case -NFS4ERR_DELAY:
4695 err = nfs4_handle_exception(server, err, &exception);
4696 } while (exception.retry);
4701 static void nfs4_release_lockowner_release(void *calldata)
4706 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4707 .rpc_release = nfs4_release_lockowner_release,
4710 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4712 struct nfs_server *server = lsp->ls_state->owner->so_server;
4713 struct nfs_release_lockowner_args *args;
4714 struct rpc_message msg = {
4715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4718 if (server->nfs_client->cl_mvops->minor_version != 0)
4720 args = kmalloc(sizeof(*args), GFP_NOFS);
4723 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4724 args->lock_owner.id = lsp->ls_id.id;
4725 args->lock_owner.s_dev = server->s_dev;
4726 msg.rpc_argp = args;
4727 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4730 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4732 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4733 const void *buf, size_t buflen,
4734 int flags, int type)
4736 if (strcmp(key, "") != 0)
4739 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4742 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4743 void *buf, size_t buflen, int type)
4745 if (strcmp(key, "") != 0)
4748 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4751 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4752 size_t list_len, const char *name,
4753 size_t name_len, int type)
4755 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4757 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4760 if (list && len <= list_len)
4761 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4766 * nfs_fhget will use either the mounted_on_fileid or the fileid
4768 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4770 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4771 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4772 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4773 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4776 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4777 NFS_ATTR_FATTR_NLINK;
4778 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4782 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4783 struct nfs4_fs_locations *fs_locations, struct page *page)
4785 struct nfs_server *server = NFS_SERVER(dir);
4787 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4789 struct nfs4_fs_locations_arg args = {
4790 .dir_fh = NFS_FH(dir),
4795 struct nfs4_fs_locations_res res = {
4796 .fs_locations = fs_locations,
4798 struct rpc_message msg = {
4799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4805 dprintk("%s: start\n", __func__);
4807 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4808 * is not supported */
4809 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4810 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4812 bitmask[0] |= FATTR4_WORD0_FILEID;
4814 nfs_fattr_init(&fs_locations->fattr);
4815 fs_locations->server = server;
4816 fs_locations->nlocations = 0;
4817 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4818 dprintk("%s: returned status = %d\n", __func__, status);
4822 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4825 struct nfs4_secinfo_arg args = {
4826 .dir_fh = NFS_FH(dir),
4829 struct nfs4_secinfo_res res = {
4832 struct rpc_message msg = {
4833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4838 dprintk("NFS call secinfo %s\n", name->name);
4839 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4840 dprintk("NFS reply secinfo: %d\n", status);
4844 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4846 struct nfs4_exception exception = { };
4849 err = nfs4_handle_exception(NFS_SERVER(dir),
4850 _nfs4_proc_secinfo(dir, name, flavors),
4852 } while (exception.retry);
4856 #ifdef CONFIG_NFS_V4_1
4858 * Check the exchange flags returned by the server for invalid flags, having
4859 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4862 static int nfs4_check_cl_exchange_flags(u32 flags)
4864 if (flags & ~EXCHGID4_FLAG_MASK_R)
4866 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4867 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4869 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4873 return -NFS4ERR_INVAL;
4877 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4879 if (a->server_scope_sz == b->server_scope_sz &&
4880 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4887 * nfs4_proc_exchange_id()
4889 * Since the clientid has expired, all compounds using sessions
4890 * associated with the stale clientid will be returning
4891 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4892 * be in some phase of session reset.
4894 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4896 nfs4_verifier verifier;
4897 struct nfs41_exchange_id_args args = {
4899 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4901 struct nfs41_exchange_id_res res = {
4905 struct rpc_message msg = {
4906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4913 dprintk("--> %s\n", __func__);
4914 BUG_ON(clp == NULL);
4916 p = (u32 *)verifier.data;
4917 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4918 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4919 args.verifier = &verifier;
4921 args.id_len = scnprintf(args.id, sizeof(args.id),
4924 init_utsname()->nodename,
4925 init_utsname()->domainname,
4926 clp->cl_rpcclient->cl_auth->au_flavor);
4928 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4929 if (unlikely(!res.server_scope)) {
4934 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4936 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4939 if (clp->server_scope &&
4940 !nfs41_same_server_scope(clp->server_scope,
4941 res.server_scope)) {
4942 dprintk("%s: server_scope mismatch detected\n",
4944 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4945 kfree(clp->server_scope);
4946 clp->server_scope = NULL;
4949 if (!clp->server_scope) {
4950 clp->server_scope = res.server_scope;
4954 kfree(res.server_scope);
4956 dprintk("<-- %s status= %d\n", __func__, status);
4960 struct nfs4_get_lease_time_data {
4961 struct nfs4_get_lease_time_args *args;
4962 struct nfs4_get_lease_time_res *res;
4963 struct nfs_client *clp;
4966 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4970 struct nfs4_get_lease_time_data *data =
4971 (struct nfs4_get_lease_time_data *)calldata;
4973 dprintk("--> %s\n", __func__);
4974 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4975 /* just setup sequence, do not trigger session recovery
4976 since we're invoked within one */
4977 ret = nfs41_setup_sequence(data->clp->cl_session,
4978 &data->args->la_seq_args,
4979 &data->res->lr_seq_res, 0, task);
4981 BUG_ON(ret == -EAGAIN);
4982 rpc_call_start(task);
4983 dprintk("<-- %s\n", __func__);
4987 * Called from nfs4_state_manager thread for session setup, so don't recover
4988 * from sequence operation or clientid errors.
4990 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4992 struct nfs4_get_lease_time_data *data =
4993 (struct nfs4_get_lease_time_data *)calldata;
4995 dprintk("--> %s\n", __func__);
4996 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4998 switch (task->tk_status) {
4999 case -NFS4ERR_DELAY:
5000 case -NFS4ERR_GRACE:
5001 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5002 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5003 task->tk_status = 0;
5005 case -NFS4ERR_RETRY_UNCACHED_REP:
5006 rpc_restart_call_prepare(task);
5009 dprintk("<-- %s\n", __func__);
5012 struct rpc_call_ops nfs4_get_lease_time_ops = {
5013 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5014 .rpc_call_done = nfs4_get_lease_time_done,
5017 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5019 struct rpc_task *task;
5020 struct nfs4_get_lease_time_args args;
5021 struct nfs4_get_lease_time_res res = {
5022 .lr_fsinfo = fsinfo,
5024 struct nfs4_get_lease_time_data data = {
5029 struct rpc_message msg = {
5030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5034 struct rpc_task_setup task_setup = {
5035 .rpc_client = clp->cl_rpcclient,
5036 .rpc_message = &msg,
5037 .callback_ops = &nfs4_get_lease_time_ops,
5038 .callback_data = &data,
5039 .flags = RPC_TASK_TIMEOUT,
5043 dprintk("--> %s\n", __func__);
5044 task = rpc_run_task(&task_setup);
5047 status = PTR_ERR(task);
5049 status = task->tk_status;
5052 dprintk("<-- %s return %d\n", __func__, status);
5058 * Reset a slot table
5060 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5063 struct nfs4_slot *new = NULL;
5067 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5068 max_reqs, tbl->max_slots);
5070 /* Does the newly negotiated max_reqs match the existing slot table? */
5071 if (max_reqs != tbl->max_slots) {
5073 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5080 spin_lock(&tbl->slot_tbl_lock);
5083 tbl->max_slots = max_reqs;
5085 for (i = 0; i < tbl->max_slots; ++i)
5086 tbl->slots[i].seq_nr = ivalue;
5087 spin_unlock(&tbl->slot_tbl_lock);
5088 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5089 tbl, tbl->slots, tbl->max_slots);
5091 dprintk("<-- %s: return %d\n", __func__, ret);
5096 * Reset the forechannel and backchannel slot tables
5098 static int nfs4_reset_slot_tables(struct nfs4_session *session)
5102 status = nfs4_reset_slot_table(&session->fc_slot_table,
5103 session->fc_attrs.max_reqs, 1);
5107 status = nfs4_reset_slot_table(&session->bc_slot_table,
5108 session->bc_attrs.max_reqs, 0);
5112 /* Destroy the slot table */
5113 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5115 if (session->fc_slot_table.slots != NULL) {
5116 kfree(session->fc_slot_table.slots);
5117 session->fc_slot_table.slots = NULL;
5119 if (session->bc_slot_table.slots != NULL) {
5120 kfree(session->bc_slot_table.slots);
5121 session->bc_slot_table.slots = NULL;
5127 * Initialize slot table
5129 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5130 int max_slots, int ivalue)
5132 struct nfs4_slot *slot;
5135 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5137 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5139 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5144 spin_lock(&tbl->slot_tbl_lock);
5145 tbl->max_slots = max_slots;
5147 tbl->highest_used_slotid = -1; /* no slot is currently used */
5148 spin_unlock(&tbl->slot_tbl_lock);
5149 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5150 tbl, tbl->slots, tbl->max_slots);
5152 dprintk("<-- %s: return %d\n", __func__, ret);
5157 * Initialize the forechannel and backchannel tables
5159 static int nfs4_init_slot_tables(struct nfs4_session *session)
5161 struct nfs4_slot_table *tbl;
5164 tbl = &session->fc_slot_table;
5165 if (tbl->slots == NULL) {
5166 status = nfs4_init_slot_table(tbl,
5167 session->fc_attrs.max_reqs, 1);
5172 tbl = &session->bc_slot_table;
5173 if (tbl->slots == NULL) {
5174 status = nfs4_init_slot_table(tbl,
5175 session->bc_attrs.max_reqs, 0);
5177 nfs4_destroy_slot_tables(session);
5183 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5185 struct nfs4_session *session;
5186 struct nfs4_slot_table *tbl;
5188 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5192 tbl = &session->fc_slot_table;
5193 tbl->highest_used_slotid = -1;
5194 spin_lock_init(&tbl->slot_tbl_lock);
5195 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5196 init_completion(&tbl->complete);
5198 tbl = &session->bc_slot_table;
5199 tbl->highest_used_slotid = -1;
5200 spin_lock_init(&tbl->slot_tbl_lock);
5201 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5202 init_completion(&tbl->complete);
5204 session->session_state = 1<<NFS4_SESSION_INITING;
5210 void nfs4_destroy_session(struct nfs4_session *session)
5212 nfs4_proc_destroy_session(session);
5213 dprintk("%s Destroy backchannel for xprt %p\n",
5214 __func__, session->clp->cl_rpcclient->cl_xprt);
5215 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5216 NFS41_BC_MIN_CALLBACKS);
5217 nfs4_destroy_slot_tables(session);
5222 * Initialize the values to be used by the client in CREATE_SESSION
5223 * If nfs4_init_session set the fore channel request and response sizes,
5226 * Set the back channel max_resp_sz_cached to zero to force the client to
5227 * always set csa_cachethis to FALSE because the current implementation
5228 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5230 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5232 struct nfs4_session *session = args->client->cl_session;
5233 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5234 mxresp_sz = session->fc_attrs.max_resp_sz;
5237 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5239 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5240 /* Fore channel attributes */
5241 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5242 args->fc_attrs.max_resp_sz = mxresp_sz;
5243 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5244 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5246 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5247 "max_ops=%u max_reqs=%u\n",
5249 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5250 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5252 /* Back channel attributes */
5253 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5254 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5255 args->bc_attrs.max_resp_sz_cached = 0;
5256 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5257 args->bc_attrs.max_reqs = 1;
5259 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5260 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5262 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5263 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5264 args->bc_attrs.max_reqs);
5267 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5269 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5270 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5272 if (rcvd->max_resp_sz > sent->max_resp_sz)
5275 * Our requested max_ops is the minimum we need; we're not
5276 * prepared to break up compounds into smaller pieces than that.
5277 * So, no point even trying to continue if the server won't
5280 if (rcvd->max_ops < sent->max_ops)
5282 if (rcvd->max_reqs == 0)
5287 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5289 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5290 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5292 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5294 if (rcvd->max_resp_sz < sent->max_resp_sz)
5296 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5298 /* These would render the backchannel useless: */
5299 if (rcvd->max_ops == 0)
5301 if (rcvd->max_reqs == 0)
5306 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5307 struct nfs4_session *session)
5311 ret = nfs4_verify_fore_channel_attrs(args, session);
5314 return nfs4_verify_back_channel_attrs(args, session);
5317 static int _nfs4_proc_create_session(struct nfs_client *clp)
5319 struct nfs4_session *session = clp->cl_session;
5320 struct nfs41_create_session_args args = {
5322 .cb_program = NFS4_CALLBACK,
5324 struct nfs41_create_session_res res = {
5327 struct rpc_message msg = {
5328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5334 nfs4_init_channel_attrs(&args);
5335 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5337 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5340 /* Verify the session's negotiated channel_attrs values */
5341 status = nfs4_verify_channel_attrs(&args, session);
5343 /* Increment the clientid slot sequence id */
5351 * Issues a CREATE_SESSION operation to the server.
5352 * It is the responsibility of the caller to verify the session is
5353 * expired before calling this routine.
5355 int nfs4_proc_create_session(struct nfs_client *clp)
5359 struct nfs4_session *session = clp->cl_session;
5361 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5363 status = _nfs4_proc_create_session(clp);
5367 /* Init and reset the fore channel */
5368 status = nfs4_init_slot_tables(session);
5369 dprintk("slot table initialization returned %d\n", status);
5372 status = nfs4_reset_slot_tables(session);
5373 dprintk("slot table reset returned %d\n", status);
5377 ptr = (unsigned *)&session->sess_id.data[0];
5378 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5379 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5381 dprintk("<-- %s\n", __func__);
5386 * Issue the over-the-wire RPC DESTROY_SESSION.
5387 * The caller must serialize access to this routine.
5389 int nfs4_proc_destroy_session(struct nfs4_session *session)
5392 struct rpc_message msg;
5394 dprintk("--> nfs4_proc_destroy_session\n");
5396 /* session is still being setup */
5397 if (session->clp->cl_cons_state != NFS_CS_READY)
5400 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5401 msg.rpc_argp = session;
5402 msg.rpc_resp = NULL;
5403 msg.rpc_cred = NULL;
5404 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5408 "Got error %d from the server on DESTROY_SESSION. "
5409 "Session has been destroyed regardless...\n", status);
5411 dprintk("<-- nfs4_proc_destroy_session\n");
5415 int nfs4_init_session(struct nfs_server *server)
5417 struct nfs_client *clp = server->nfs_client;
5418 struct nfs4_session *session;
5419 unsigned int rsize, wsize;
5422 if (!nfs4_has_session(clp))
5425 session = clp->cl_session;
5426 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5429 rsize = server->rsize;
5431 rsize = NFS_MAX_FILE_IO_SIZE;
5432 wsize = server->wsize;
5434 wsize = NFS_MAX_FILE_IO_SIZE;
5436 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5437 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5439 ret = nfs4_recover_expired_lease(server);
5441 ret = nfs4_check_client_ready(clp);
5445 int nfs4_init_ds_session(struct nfs_client *clp)
5447 struct nfs4_session *session = clp->cl_session;
5450 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5453 ret = nfs4_client_recover_expired_lease(clp);
5455 /* Test for the DS role */
5456 if (!is_ds_client(clp))
5459 ret = nfs4_check_client_ready(clp);
5463 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5467 * Renew the cl_session lease.
5469 struct nfs4_sequence_data {
5470 struct nfs_client *clp;
5471 struct nfs4_sequence_args args;
5472 struct nfs4_sequence_res res;
5475 static void nfs41_sequence_release(void *data)
5477 struct nfs4_sequence_data *calldata = data;
5478 struct nfs_client *clp = calldata->clp;
5480 if (atomic_read(&clp->cl_count) > 1)
5481 nfs4_schedule_state_renewal(clp);
5482 nfs_put_client(clp);
5486 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5488 switch(task->tk_status) {
5489 case -NFS4ERR_DELAY:
5490 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5493 nfs4_schedule_lease_recovery(clp);
5498 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5500 struct nfs4_sequence_data *calldata = data;
5501 struct nfs_client *clp = calldata->clp;
5503 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5506 if (task->tk_status < 0) {
5507 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5508 if (atomic_read(&clp->cl_count) == 1)
5511 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5512 rpc_restart_call_prepare(task);
5516 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5518 dprintk("<-- %s\n", __func__);
5521 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5523 struct nfs4_sequence_data *calldata = data;
5524 struct nfs_client *clp = calldata->clp;
5525 struct nfs4_sequence_args *args;
5526 struct nfs4_sequence_res *res;
5528 args = task->tk_msg.rpc_argp;
5529 res = task->tk_msg.rpc_resp;
5531 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5533 rpc_call_start(task);
5536 static const struct rpc_call_ops nfs41_sequence_ops = {
5537 .rpc_call_done = nfs41_sequence_call_done,
5538 .rpc_call_prepare = nfs41_sequence_prepare,
5539 .rpc_release = nfs41_sequence_release,
5542 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5544 struct nfs4_sequence_data *calldata;
5545 struct rpc_message msg = {
5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5549 struct rpc_task_setup task_setup_data = {
5550 .rpc_client = clp->cl_rpcclient,
5551 .rpc_message = &msg,
5552 .callback_ops = &nfs41_sequence_ops,
5553 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5556 if (!atomic_inc_not_zero(&clp->cl_count))
5557 return ERR_PTR(-EIO);
5558 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5559 if (calldata == NULL) {
5560 nfs_put_client(clp);
5561 return ERR_PTR(-ENOMEM);
5563 msg.rpc_argp = &calldata->args;
5564 msg.rpc_resp = &calldata->res;
5565 calldata->clp = clp;
5566 task_setup_data.callback_data = calldata;
5568 return rpc_run_task(&task_setup_data);
5571 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5573 struct rpc_task *task;
5576 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5578 task = _nfs41_proc_sequence(clp, cred);
5580 ret = PTR_ERR(task);
5582 rpc_put_task_async(task);
5583 dprintk("<-- %s status=%d\n", __func__, ret);
5587 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5589 struct rpc_task *task;
5592 task = _nfs41_proc_sequence(clp, cred);
5594 ret = PTR_ERR(task);
5597 ret = rpc_wait_for_completion_task(task);
5599 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5601 if (task->tk_status == 0)
5602 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5603 ret = task->tk_status;
5607 dprintk("<-- %s status=%d\n", __func__, ret);
5611 struct nfs4_reclaim_complete_data {
5612 struct nfs_client *clp;
5613 struct nfs41_reclaim_complete_args arg;
5614 struct nfs41_reclaim_complete_res res;
5617 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5619 struct nfs4_reclaim_complete_data *calldata = data;
5621 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5622 if (nfs41_setup_sequence(calldata->clp->cl_session,
5623 &calldata->arg.seq_args,
5624 &calldata->res.seq_res, 0, task))
5627 rpc_call_start(task);
5630 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5632 switch(task->tk_status) {
5634 case -NFS4ERR_COMPLETE_ALREADY:
5635 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5637 case -NFS4ERR_DELAY:
5638 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5640 case -NFS4ERR_RETRY_UNCACHED_REP:
5643 nfs4_schedule_lease_recovery(clp);
5648 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5650 struct nfs4_reclaim_complete_data *calldata = data;
5651 struct nfs_client *clp = calldata->clp;
5652 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5654 dprintk("--> %s\n", __func__);
5655 if (!nfs41_sequence_done(task, res))
5658 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5659 rpc_restart_call_prepare(task);
5662 dprintk("<-- %s\n", __func__);
5665 static void nfs4_free_reclaim_complete_data(void *data)
5667 struct nfs4_reclaim_complete_data *calldata = data;
5672 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5673 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5674 .rpc_call_done = nfs4_reclaim_complete_done,
5675 .rpc_release = nfs4_free_reclaim_complete_data,
5679 * Issue a global reclaim complete.
5681 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5683 struct nfs4_reclaim_complete_data *calldata;
5684 struct rpc_task *task;
5685 struct rpc_message msg = {
5686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5688 struct rpc_task_setup task_setup_data = {
5689 .rpc_client = clp->cl_rpcclient,
5690 .rpc_message = &msg,
5691 .callback_ops = &nfs4_reclaim_complete_call_ops,
5692 .flags = RPC_TASK_ASYNC,
5694 int status = -ENOMEM;
5696 dprintk("--> %s\n", __func__);
5697 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5698 if (calldata == NULL)
5700 calldata->clp = clp;
5701 calldata->arg.one_fs = 0;
5703 msg.rpc_argp = &calldata->arg;
5704 msg.rpc_resp = &calldata->res;
5705 task_setup_data.callback_data = calldata;
5706 task = rpc_run_task(&task_setup_data);
5708 status = PTR_ERR(task);
5711 status = nfs4_wait_for_completion_rpc_task(task);
5713 status = task->tk_status;
5717 dprintk("<-- %s status=%d\n", __func__, status);
5722 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5724 struct nfs4_layoutget *lgp = calldata;
5725 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5727 dprintk("--> %s\n", __func__);
5728 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5729 * right now covering the LAYOUTGET we are about to send.
5730 * However, that is not so catastrophic, and there seems
5731 * to be no way to prevent it completely.
5733 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5734 &lgp->res.seq_res, 0, task))
5736 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5737 NFS_I(lgp->args.inode)->layout,
5738 lgp->args.ctx->state)) {
5739 rpc_exit(task, NFS4_OK);
5742 rpc_call_start(task);
5745 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5747 struct nfs4_layoutget *lgp = calldata;
5748 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5750 dprintk("--> %s\n", __func__);
5752 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5755 switch (task->tk_status) {
5758 case -NFS4ERR_LAYOUTTRYLATER:
5759 case -NFS4ERR_RECALLCONFLICT:
5760 task->tk_status = -NFS4ERR_DELAY;
5763 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5764 rpc_restart_call_prepare(task);
5768 dprintk("<-- %s\n", __func__);
5771 static size_t max_response_pages(struct nfs_server *server)
5773 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
5774 return nfs_page_array_len(0, max_resp_sz);
5777 static void nfs4_free_pages(struct page **pages, size_t size)
5784 for (i = 0; i < size; i++) {
5787 __free_page(pages[i]);
5792 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
5794 struct page **pages;
5797 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
5799 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
5803 for (i = 0; i < size; i++) {
5804 pages[i] = alloc_page(gfp_flags);
5806 dprintk("%s: failed to allocate page\n", __func__);
5807 nfs4_free_pages(pages, size);
5815 static void nfs4_layoutget_release(void *calldata)
5817 struct nfs4_layoutget *lgp = calldata;
5818 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5819 size_t max_pages = max_response_pages(server);
5821 dprintk("--> %s\n", __func__);
5822 nfs4_free_pages(lgp->args.layout.pages, max_pages);
5823 put_nfs_open_context(lgp->args.ctx);
5825 dprintk("<-- %s\n", __func__);
5828 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5829 .rpc_call_prepare = nfs4_layoutget_prepare,
5830 .rpc_call_done = nfs4_layoutget_done,
5831 .rpc_release = nfs4_layoutget_release,
5834 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
5836 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5837 size_t max_pages = max_response_pages(server);
5838 struct rpc_task *task;
5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5841 .rpc_argp = &lgp->args,
5842 .rpc_resp = &lgp->res,
5844 struct rpc_task_setup task_setup_data = {
5845 .rpc_client = server->client,
5846 .rpc_message = &msg,
5847 .callback_ops = &nfs4_layoutget_call_ops,
5848 .callback_data = lgp,
5849 .flags = RPC_TASK_ASYNC,
5853 dprintk("--> %s\n", __func__);
5855 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
5856 if (!lgp->args.layout.pages) {
5857 nfs4_layoutget_release(lgp);
5860 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
5862 lgp->res.layoutp = &lgp->args.layout;
5863 lgp->res.seq_res.sr_slot = NULL;
5864 task = rpc_run_task(&task_setup_data);
5866 return PTR_ERR(task);
5867 status = nfs4_wait_for_completion_rpc_task(task);
5869 status = task->tk_status;
5871 status = pnfs_layout_process(lgp);
5873 dprintk("<-- %s status=%d\n", __func__, status);
5878 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5880 struct nfs4_layoutreturn *lrp = calldata;
5882 dprintk("--> %s\n", __func__);
5883 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5884 &lrp->res.seq_res, 0, task))
5886 rpc_call_start(task);
5889 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5891 struct nfs4_layoutreturn *lrp = calldata;
5892 struct nfs_server *server;
5893 struct pnfs_layout_hdr *lo = lrp->args.layout;
5895 dprintk("--> %s\n", __func__);
5897 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5900 server = NFS_SERVER(lrp->args.inode);
5901 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5902 rpc_restart_call_prepare(task);
5905 spin_lock(&lo->plh_inode->i_lock);
5906 if (task->tk_status == 0) {
5907 if (lrp->res.lrs_present) {
5908 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5910 BUG_ON(!list_empty(&lo->plh_segs));
5912 lo->plh_block_lgets--;
5913 spin_unlock(&lo->plh_inode->i_lock);
5914 dprintk("<-- %s\n", __func__);
5917 static void nfs4_layoutreturn_release(void *calldata)
5919 struct nfs4_layoutreturn *lrp = calldata;
5921 dprintk("--> %s\n", __func__);
5922 put_layout_hdr(lrp->args.layout);
5924 dprintk("<-- %s\n", __func__);
5927 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5928 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5929 .rpc_call_done = nfs4_layoutreturn_done,
5930 .rpc_release = nfs4_layoutreturn_release,
5933 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5935 struct rpc_task *task;
5936 struct rpc_message msg = {
5937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5938 .rpc_argp = &lrp->args,
5939 .rpc_resp = &lrp->res,
5941 struct rpc_task_setup task_setup_data = {
5942 .rpc_client = lrp->clp->cl_rpcclient,
5943 .rpc_message = &msg,
5944 .callback_ops = &nfs4_layoutreturn_call_ops,
5945 .callback_data = lrp,
5949 dprintk("--> %s\n", __func__);
5950 task = rpc_run_task(&task_setup_data);
5952 return PTR_ERR(task);
5953 status = task->tk_status;
5954 dprintk("<-- %s status=%d\n", __func__, status);
5960 * Retrieve the list of Data Server devices from the MDS.
5962 static int _nfs4_getdevicelist(struct nfs_server *server,
5963 const struct nfs_fh *fh,
5964 struct pnfs_devicelist *devlist)
5966 struct nfs4_getdevicelist_args args = {
5968 .layoutclass = server->pnfs_curr_ld->id,
5970 struct nfs4_getdevicelist_res res = {
5973 struct rpc_message msg = {
5974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5980 dprintk("--> %s\n", __func__);
5981 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5983 dprintk("<-- %s status=%d\n", __func__, status);
5987 int nfs4_proc_getdevicelist(struct nfs_server *server,
5988 const struct nfs_fh *fh,
5989 struct pnfs_devicelist *devlist)
5991 struct nfs4_exception exception = { };
5995 err = nfs4_handle_exception(server,
5996 _nfs4_getdevicelist(server, fh, devlist),
5998 } while (exception.retry);
6000 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6001 err, devlist->num_devs);
6005 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6008 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6010 struct nfs4_getdeviceinfo_args args = {
6013 struct nfs4_getdeviceinfo_res res = {
6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6023 dprintk("--> %s\n", __func__);
6024 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6025 dprintk("<-- %s status=%d\n", __func__, status);
6030 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6032 struct nfs4_exception exception = { };
6036 err = nfs4_handle_exception(server,
6037 _nfs4_proc_getdeviceinfo(server, pdev),
6039 } while (exception.retry);
6042 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6044 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6046 struct nfs4_layoutcommit_data *data = calldata;
6047 struct nfs_server *server = NFS_SERVER(data->args.inode);
6049 if (nfs4_setup_sequence(server, &data->args.seq_args,
6050 &data->res.seq_res, 1, task))
6052 rpc_call_start(task);
6056 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6058 struct nfs4_layoutcommit_data *data = calldata;
6059 struct nfs_server *server = NFS_SERVER(data->args.inode);
6061 if (!nfs4_sequence_done(task, &data->res.seq_res))
6064 switch (task->tk_status) { /* Just ignore these failures */
6065 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6066 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6067 case -NFS4ERR_BADLAYOUT: /* no layout */
6068 case -NFS4ERR_GRACE: /* loca_recalim always false */
6069 task->tk_status = 0;
6072 nfs_post_op_update_inode_force_wcc(data->args.inode,
6076 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6077 rpc_restart_call_prepare(task);
6083 static void nfs4_layoutcommit_release(void *calldata)
6085 struct nfs4_layoutcommit_data *data = calldata;
6086 struct pnfs_layout_segment *lseg, *tmp;
6087 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6089 pnfs_cleanup_layoutcommit(data);
6090 /* Matched by references in pnfs_set_layoutcommit */
6091 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6092 list_del_init(&lseg->pls_lc_list);
6093 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6098 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6099 smp_mb__after_clear_bit();
6100 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6102 put_rpccred(data->cred);
6106 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6107 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6108 .rpc_call_done = nfs4_layoutcommit_done,
6109 .rpc_release = nfs4_layoutcommit_release,
6113 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6115 struct rpc_message msg = {
6116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6117 .rpc_argp = &data->args,
6118 .rpc_resp = &data->res,
6119 .rpc_cred = data->cred,
6121 struct rpc_task_setup task_setup_data = {
6122 .task = &data->task,
6123 .rpc_client = NFS_CLIENT(data->args.inode),
6124 .rpc_message = &msg,
6125 .callback_ops = &nfs4_layoutcommit_ops,
6126 .callback_data = data,
6127 .flags = RPC_TASK_ASYNC,
6129 struct rpc_task *task;
6132 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6133 "lbw: %llu inode %lu\n",
6134 data->task.tk_pid, sync,
6135 data->args.lastbytewritten,
6136 data->args.inode->i_ino);
6138 task = rpc_run_task(&task_setup_data);
6140 return PTR_ERR(task);
6143 status = nfs4_wait_for_completion_rpc_task(task);
6146 status = task->tk_status;
6148 dprintk("%s: status %d\n", __func__, status);
6154 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6155 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6157 struct nfs41_secinfo_no_name_args args = {
6158 .style = SECINFO_STYLE_CURRENT_FH,
6160 struct nfs4_secinfo_res res = {
6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6168 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6172 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6173 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6175 struct nfs4_exception exception = { };
6178 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6181 case -NFS4ERR_WRONGSEC:
6182 case -NFS4ERR_NOTSUPP:
6185 err = nfs4_handle_exception(server, err, &exception);
6187 } while (exception.retry);
6193 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6194 struct nfs_fsinfo *info)
6198 rpc_authflavor_t flavor;
6199 struct nfs4_secinfo_flavors *flavors;
6201 page = alloc_page(GFP_KERNEL);
6207 flavors = page_address(page);
6208 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6211 * Fall back on "guess and check" method if
6212 * the server doesn't support SECINFO_NO_NAME
6214 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6215 err = nfs4_find_root_sec(server, fhandle, info);
6221 flavor = nfs_find_best_sec(flavors);
6223 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6232 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6235 struct nfs41_test_stateid_args args = {
6236 .stateid = &state->stateid,
6238 struct nfs41_test_stateid_res res;
6239 struct rpc_message msg = {
6240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6244 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6245 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6249 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6251 struct nfs4_exception exception = { };
6254 err = nfs4_handle_exception(server,
6255 _nfs41_test_stateid(server, state),
6257 } while (exception.retry);
6261 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6264 struct nfs41_free_stateid_args args = {
6265 .stateid = &state->stateid,
6267 struct nfs41_free_stateid_res res;
6268 struct rpc_message msg = {
6269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6274 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6275 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6279 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6281 struct nfs4_exception exception = { };
6284 err = nfs4_handle_exception(server,
6285 _nfs4_free_stateid(server, state),
6287 } while (exception.retry);
6290 #endif /* CONFIG_NFS_V4_1 */
6292 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6293 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6294 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6295 .recover_open = nfs4_open_reclaim,
6296 .recover_lock = nfs4_lock_reclaim,
6297 .establish_clid = nfs4_init_clientid,
6298 .get_clid_cred = nfs4_get_setclientid_cred,
6301 #if defined(CONFIG_NFS_V4_1)
6302 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6303 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6304 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6305 .recover_open = nfs4_open_reclaim,
6306 .recover_lock = nfs4_lock_reclaim,
6307 .establish_clid = nfs41_init_clientid,
6308 .get_clid_cred = nfs4_get_exchange_id_cred,
6309 .reclaim_complete = nfs41_proc_reclaim_complete,
6311 #endif /* CONFIG_NFS_V4_1 */
6313 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6314 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6315 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6316 .recover_open = nfs4_open_expired,
6317 .recover_lock = nfs4_lock_expired,
6318 .establish_clid = nfs4_init_clientid,
6319 .get_clid_cred = nfs4_get_setclientid_cred,
6322 #if defined(CONFIG_NFS_V4_1)
6323 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6324 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6325 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6326 .recover_open = nfs41_open_expired,
6327 .recover_lock = nfs41_lock_expired,
6328 .establish_clid = nfs41_init_clientid,
6329 .get_clid_cred = nfs4_get_exchange_id_cred,
6331 #endif /* CONFIG_NFS_V4_1 */
6333 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6334 .sched_state_renewal = nfs4_proc_async_renew,
6335 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6336 .renew_lease = nfs4_proc_renew,
6339 #if defined(CONFIG_NFS_V4_1)
6340 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6341 .sched_state_renewal = nfs41_proc_async_sequence,
6342 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6343 .renew_lease = nfs4_proc_sequence,
6347 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6349 .call_sync = _nfs4_call_sync,
6350 .validate_stateid = nfs4_validate_delegation_stateid,
6351 .find_root_sec = nfs4_find_root_sec,
6352 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6353 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6354 .state_renewal_ops = &nfs40_state_renewal_ops,
6357 #if defined(CONFIG_NFS_V4_1)
6358 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6360 .call_sync = _nfs4_call_sync_session,
6361 .validate_stateid = nfs41_validate_delegation_stateid,
6362 .find_root_sec = nfs41_find_root_sec,
6363 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6364 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6365 .state_renewal_ops = &nfs41_state_renewal_ops,
6369 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6370 [0] = &nfs_v4_0_minor_ops,
6371 #if defined(CONFIG_NFS_V4_1)
6372 [1] = &nfs_v4_1_minor_ops,
6376 static const struct inode_operations nfs4_file_inode_operations = {
6377 .permission = nfs_permission,
6378 .getattr = nfs_getattr,
6379 .setattr = nfs_setattr,
6380 .getxattr = generic_getxattr,
6381 .setxattr = generic_setxattr,
6382 .listxattr = generic_listxattr,
6383 .removexattr = generic_removexattr,
6386 const struct nfs_rpc_ops nfs_v4_clientops = {
6387 .version = 4, /* protocol version */
6388 .dentry_ops = &nfs4_dentry_operations,
6389 .dir_inode_ops = &nfs4_dir_inode_operations,
6390 .file_inode_ops = &nfs4_file_inode_operations,
6391 .file_ops = &nfs4_file_operations,
6392 .getroot = nfs4_proc_get_root,
6393 .getattr = nfs4_proc_getattr,
6394 .setattr = nfs4_proc_setattr,
6395 .lookup = nfs4_proc_lookup,
6396 .access = nfs4_proc_access,
6397 .readlink = nfs4_proc_readlink,
6398 .create = nfs4_proc_create,
6399 .remove = nfs4_proc_remove,
6400 .unlink_setup = nfs4_proc_unlink_setup,
6401 .unlink_done = nfs4_proc_unlink_done,
6402 .rename = nfs4_proc_rename,
6403 .rename_setup = nfs4_proc_rename_setup,
6404 .rename_done = nfs4_proc_rename_done,
6405 .link = nfs4_proc_link,
6406 .symlink = nfs4_proc_symlink,
6407 .mkdir = nfs4_proc_mkdir,
6408 .rmdir = nfs4_proc_remove,
6409 .readdir = nfs4_proc_readdir,
6410 .mknod = nfs4_proc_mknod,
6411 .statfs = nfs4_proc_statfs,
6412 .fsinfo = nfs4_proc_fsinfo,
6413 .pathconf = nfs4_proc_pathconf,
6414 .set_capabilities = nfs4_server_capabilities,
6415 .decode_dirent = nfs4_decode_dirent,
6416 .read_setup = nfs4_proc_read_setup,
6417 .read_done = nfs4_read_done,
6418 .write_setup = nfs4_proc_write_setup,
6419 .write_done = nfs4_write_done,
6420 .commit_setup = nfs4_proc_commit_setup,
6421 .commit_done = nfs4_commit_done,
6422 .lock = nfs4_proc_lock,
6423 .clear_acl_cache = nfs4_zap_acl_attr,
6424 .close_context = nfs4_close_context,
6425 .open_context = nfs4_atomic_open,
6426 .init_client = nfs4_init_client,
6427 .secinfo = nfs4_proc_secinfo,
6430 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6431 .prefix = XATTR_NAME_NFSV4_ACL,
6432 .list = nfs4_xattr_list_nfs4_acl,
6433 .get = nfs4_xattr_get_nfs4_acl,
6434 .set = nfs4_xattr_set_nfs4_acl,
6437 const struct xattr_handler *nfs4_xattr_handlers[] = {
6438 &nfs4_xattr_nfs4_acl_handler,