4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/sunrpc/gss_api.h>
45 #include <linux/nfs.h>
46 #include <linux/nfs4.h>
47 #include <linux/nfs_fs.h>
48 #include <linux/nfs_page.h>
49 #include <linux/nfs_mount.h>
50 #include <linux/namei.h>
51 #include <linux/mount.h>
52 #include <linux/module.h>
53 #include <linux/sunrpc/bc_xprt.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
58 #include "delegation.h"
64 #define NFSDBG_FACILITY NFSDBG_PROC
66 #define NFS4_POLL_RETRY_MIN (HZ/10)
67 #define NFS4_POLL_RETRY_MAX (15*HZ)
69 #define NFS4_MAX_LOOP_ON_RECOVER (10)
72 static int _nfs4_proc_open(struct nfs4_opendata *data);
73 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
74 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
75 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
76 static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
77 const struct qstr *name, struct nfs_fh *fhandle,
78 struct nfs_fattr *fattr);
79 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
80 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
84 /* Prevent leaks of NFSv4 errors into userland */
85 static int nfs4_map_errors(int err)
90 case -NFS4ERR_RESOURCE:
92 case -NFS4ERR_WRONGSEC:
94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
98 dprintk("%s could not handle NFSv4 error %d\n",
106 * This is our standard bitmap for GETATTR requests.
108 const u32 nfs4_fattr_bitmap[2] = {
110 | FATTR4_WORD0_CHANGE
113 | FATTR4_WORD0_FILEID,
115 | FATTR4_WORD1_NUMLINKS
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
125 const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
134 const u32 nfs4_pathconf_bitmap[2] = {
136 | FATTR4_WORD0_MAXNAME,
140 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
144 FATTR4_WORD1_TIME_DELTA
145 | FATTR4_WORD1_FS_LAYOUT_TYPES
148 const u32 nfs4_fs_locations_bitmap[2] = {
150 | FATTR4_WORD0_CHANGE
153 | FATTR4_WORD0_FILEID
154 | FATTR4_WORD0_FS_LOCATIONS,
156 | FATTR4_WORD1_NUMLINKS
158 | FATTR4_WORD1_OWNER_GROUP
159 | FATTR4_WORD1_RAWDEV
160 | FATTR4_WORD1_SPACE_USED
161 | FATTR4_WORD1_TIME_ACCESS
162 | FATTR4_WORD1_TIME_METADATA
163 | FATTR4_WORD1_TIME_MODIFY
164 | FATTR4_WORD1_MOUNTED_ON_FILEID
167 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
168 struct nfs4_readdir_arg *readdir)
172 BUG_ON(readdir->count < 80);
174 readdir->cookie = cookie;
175 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
180 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
185 * NFSv4 servers do not return entries for '.' and '..'
186 * Therefore, we fake these entries here. We let '.'
187 * have cookie 0 and '..' have cookie 1. Note that
188 * when talking to the server, we always send cookie 0
191 start = p = kmap_atomic(*readdir->pages, KM_USER0);
194 *p++ = xdr_one; /* next */
195 *p++ = xdr_zero; /* cookie, first word */
196 *p++ = xdr_one; /* cookie, second word */
197 *p++ = xdr_one; /* entry len */
198 memcpy(p, ".\0\0\0", 4); /* entry */
200 *p++ = xdr_one; /* bitmap length */
201 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
202 *p++ = htonl(8); /* attribute buffer length */
203 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
206 *p++ = xdr_one; /* next */
207 *p++ = xdr_zero; /* cookie, first word */
208 *p++ = xdr_two; /* cookie, second word */
209 *p++ = xdr_two; /* entry len */
210 memcpy(p, "..\0\0", 4); /* entry */
212 *p++ = xdr_one; /* bitmap length */
213 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
214 *p++ = htonl(8); /* attribute buffer length */
215 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
217 readdir->pgbase = (char *)p - (char *)start;
218 readdir->count -= readdir->pgbase;
219 kunmap_atomic(start, KM_USER0);
222 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
228 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
229 nfs_wait_bit_killable, TASK_KILLABLE);
233 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
240 *timeout = NFS4_POLL_RETRY_MIN;
241 if (*timeout > NFS4_POLL_RETRY_MAX)
242 *timeout = NFS4_POLL_RETRY_MAX;
243 schedule_timeout_killable(*timeout);
244 if (fatal_signal_pending(current))
250 /* This is the error handling routine for processes that are allowed
253 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
255 struct nfs_client *clp = server->nfs_client;
256 struct nfs4_state *state = exception->state;
259 exception->retry = 0;
263 case -NFS4ERR_ADMIN_REVOKED:
264 case -NFS4ERR_BAD_STATEID:
265 case -NFS4ERR_OPENMODE:
268 nfs4_schedule_stateid_recovery(server, state);
269 goto wait_on_recovery;
270 case -NFS4ERR_STALE_STATEID:
271 case -NFS4ERR_STALE_CLIENTID:
272 case -NFS4ERR_EXPIRED:
273 nfs4_schedule_lease_recovery(clp);
274 goto wait_on_recovery;
275 #if defined(CONFIG_NFS_V4_1)
276 case -NFS4ERR_BADSESSION:
277 case -NFS4ERR_BADSLOT:
278 case -NFS4ERR_BAD_HIGH_SLOT:
279 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
280 case -NFS4ERR_DEADSESSION:
281 case -NFS4ERR_SEQ_FALSE_RETRY:
282 case -NFS4ERR_SEQ_MISORDERED:
283 dprintk("%s ERROR: %d Reset session\n", __func__,
285 nfs4_schedule_session_recovery(clp->cl_session);
286 exception->retry = 1;
288 #endif /* defined(CONFIG_NFS_V4_1) */
289 case -NFS4ERR_FILE_OPEN:
290 if (exception->timeout > HZ) {
291 /* We have retried a decent amount, time to
300 ret = nfs4_delay(server->client, &exception->timeout);
303 case -NFS4ERR_RETRY_UNCACHED_REP:
304 case -NFS4ERR_OLD_STATEID:
305 exception->retry = 1;
307 case -NFS4ERR_BADOWNER:
308 /* The following works around a Linux server bug! */
309 case -NFS4ERR_BADNAME:
310 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
311 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
312 exception->retry = 1;
313 printk(KERN_WARNING "NFS: v4 server %s "
314 "does not accept raw "
316 "Reenabling the idmapper.\n",
317 server->nfs_client->cl_hostname);
320 /* We failed to handle the error */
321 return nfs4_map_errors(ret);
323 ret = nfs4_wait_clnt_recover(clp);
325 exception->retry = 1;
330 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
332 spin_lock(&clp->cl_lock);
333 if (time_before(clp->cl_last_renewal,timestamp))
334 clp->cl_last_renewal = timestamp;
335 spin_unlock(&clp->cl_lock);
338 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
340 do_renew_lease(server->nfs_client, timestamp);
343 #if defined(CONFIG_NFS_V4_1)
346 * nfs4_free_slot - free a slot and efficiently update slot table.
348 * freeing a slot is trivially done by clearing its respective bit
350 * If the freed slotid equals highest_used_slotid we want to update it
351 * so that the server would be able to size down the slot table if needed,
352 * otherwise we know that the highest_used_slotid is still in use.
353 * When updating highest_used_slotid there may be "holes" in the bitmap
354 * so we need to scan down from highest_used_slotid to 0 looking for the now
355 * highest slotid in use.
356 * If none found, highest_used_slotid is set to -1.
358 * Must be called while holding tbl->slot_tbl_lock
361 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
363 int free_slotid = free_slot - tbl->slots;
364 int slotid = free_slotid;
366 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
367 /* clear used bit in bitmap */
368 __clear_bit(slotid, tbl->used_slots);
370 /* update highest_used_slotid when it is freed */
371 if (slotid == tbl->highest_used_slotid) {
372 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
373 if (slotid < tbl->max_slots)
374 tbl->highest_used_slotid = slotid;
376 tbl->highest_used_slotid = -1;
378 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
379 free_slotid, tbl->highest_used_slotid);
383 * Signal state manager thread if session fore channel is drained
385 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
387 struct rpc_task *task;
389 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
390 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
392 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
396 if (ses->fc_slot_table.highest_used_slotid != -1)
399 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
400 complete(&ses->fc_slot_table.complete);
404 * Signal state manager thread if session back channel is drained
406 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
408 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
409 ses->bc_slot_table.highest_used_slotid != -1)
411 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
412 complete(&ses->bc_slot_table.complete);
415 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
417 struct nfs4_slot_table *tbl;
419 tbl = &res->sr_session->fc_slot_table;
421 /* just wake up the next guy waiting since
422 * we may have not consumed a slot after all */
423 dprintk("%s: No slot\n", __func__);
427 spin_lock(&tbl->slot_tbl_lock);
428 nfs4_free_slot(tbl, res->sr_slot);
429 nfs4_check_drain_fc_complete(res->sr_session);
430 spin_unlock(&tbl->slot_tbl_lock);
434 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
436 unsigned long timestamp;
437 struct nfs_client *clp;
440 * sr_status remains 1 if an RPC level error occurred. The server
441 * may or may not have processed the sequence operation..
442 * Proceed as if the server received and processed the sequence
445 if (res->sr_status == 1)
446 res->sr_status = NFS_OK;
448 /* don't increment the sequence number if the task wasn't sent */
449 if (!RPC_WAS_SENT(task))
452 /* Check the SEQUENCE operation status */
453 switch (res->sr_status) {
455 /* Update the slot's sequence and clientid lease timer */
456 ++res->sr_slot->seq_nr;
457 timestamp = res->sr_renewal_time;
458 clp = res->sr_session->clp;
459 do_renew_lease(clp, timestamp);
460 /* Check sequence flags */
461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
465 /* The server detected a resend of the RPC call and
466 * returned NFS4ERR_DELAY as per Section 2.10.6.2
469 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
471 res->sr_slot - res->sr_session->fc_slot_table.slots,
472 res->sr_slot->seq_nr);
475 /* Just update the slot sequence no. */
476 ++res->sr_slot->seq_nr;
479 /* The session may be reset by one of the error handlers. */
480 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
481 nfs41_sequence_free_slot(res);
484 if (!rpc_restart_call(task))
486 rpc_delay(task, NFS4_POLL_RETRY_MAX);
490 static int nfs4_sequence_done(struct rpc_task *task,
491 struct nfs4_sequence_res *res)
493 if (res->sr_session == NULL)
495 return nfs41_sequence_done(task, res);
499 * nfs4_find_slot - efficiently look for a free slot
501 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
502 * If found, we mark the slot as used, update the highest_used_slotid,
503 * and respectively set up the sequence operation args.
504 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
506 * Note: must be called with under the slot_tbl_lock.
509 nfs4_find_slot(struct nfs4_slot_table *tbl)
512 u8 ret_id = NFS4_MAX_SLOT_TABLE;
513 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
515 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
516 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
518 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
519 if (slotid >= tbl->max_slots)
521 __set_bit(slotid, tbl->used_slots);
522 if (slotid > tbl->highest_used_slotid)
523 tbl->highest_used_slotid = slotid;
526 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
527 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
531 int nfs41_setup_sequence(struct nfs4_session *session,
532 struct nfs4_sequence_args *args,
533 struct nfs4_sequence_res *res,
535 struct rpc_task *task)
537 struct nfs4_slot *slot;
538 struct nfs4_slot_table *tbl;
541 dprintk("--> %s\n", __func__);
542 /* slot already allocated? */
543 if (res->sr_slot != NULL)
546 tbl = &session->fc_slot_table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
550 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
552 * The state manager will wait until the slot table is empty.
553 * Schedule the reset thread
555 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
556 spin_unlock(&tbl->slot_tbl_lock);
557 dprintk("%s Schedule Session Reset\n", __func__);
561 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
562 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
563 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
564 spin_unlock(&tbl->slot_tbl_lock);
565 dprintk("%s enforce FIFO order\n", __func__);
569 slotid = nfs4_find_slot(tbl);
570 if (slotid == NFS4_MAX_SLOT_TABLE) {
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("<-- %s: no free slots\n", __func__);
576 spin_unlock(&tbl->slot_tbl_lock);
578 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
579 slot = tbl->slots + slotid;
580 args->sa_session = session;
581 args->sa_slotid = slotid;
582 args->sa_cache_this = cache_reply;
584 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
586 res->sr_session = session;
588 res->sr_renewal_time = jiffies;
589 res->sr_status_flags = 0;
591 * sr_status is only set in decode_sequence, and so will remain
592 * set to 1 if an rpc level failure occurs.
597 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
599 int nfs4_setup_sequence(const struct nfs_server *server,
600 struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res,
603 struct rpc_task *task)
605 struct nfs4_session *session = nfs4_get_session(server);
608 if (session == NULL) {
609 args->sa_session = NULL;
610 res->sr_session = NULL;
614 dprintk("--> %s clp %p session %p sr_slot %td\n",
615 __func__, session->clp, session, res->sr_slot ?
616 res->sr_slot - session->fc_slot_table.slots : -1);
618 ret = nfs41_setup_sequence(session, args, res, cache_reply,
621 dprintk("<-- %s status=%d\n", __func__, ret);
625 struct nfs41_call_sync_data {
626 const struct nfs_server *seq_server;
627 struct nfs4_sequence_args *seq_args;
628 struct nfs4_sequence_res *seq_res;
632 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
634 struct nfs41_call_sync_data *data = calldata;
636 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
638 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
639 data->seq_res, data->cache_reply, task))
641 rpc_call_start(task);
644 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
646 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
647 nfs41_call_sync_prepare(task, calldata);
650 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
652 struct nfs41_call_sync_data *data = calldata;
654 nfs41_sequence_done(task, data->seq_res);
657 struct rpc_call_ops nfs41_call_sync_ops = {
658 .rpc_call_prepare = nfs41_call_sync_prepare,
659 .rpc_call_done = nfs41_call_sync_done,
662 struct rpc_call_ops nfs41_call_priv_sync_ops = {
663 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
664 .rpc_call_done = nfs41_call_sync_done,
667 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res,
676 struct rpc_task *task;
677 struct nfs41_call_sync_data data = {
678 .seq_server = server,
681 .cache_reply = cache_reply,
683 struct rpc_task_setup task_setup = {
686 .callback_ops = &nfs41_call_sync_ops,
687 .callback_data = &data
692 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
693 task = rpc_run_task(&task_setup);
697 ret = task->tk_status;
703 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
704 struct nfs_server *server,
705 struct rpc_message *msg,
706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
710 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
714 static int nfs4_sequence_done(struct rpc_task *task,
715 struct nfs4_sequence_res *res)
719 #endif /* CONFIG_NFS_V4_1 */
721 int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
725 struct nfs4_sequence_res *res,
728 args->sa_session = res->sr_session = NULL;
729 return rpc_call_sync(clnt, msg, 0);
733 int nfs4_call_sync(struct rpc_clnt *clnt,
734 struct nfs_server *server,
735 struct rpc_message *msg,
736 struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res,
740 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
741 args, res, cache_reply);
744 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
746 struct nfs_inode *nfsi = NFS_I(dir);
748 spin_lock(&dir->i_lock);
749 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
750 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
751 nfs_force_lookup_revalidate(dir);
752 nfsi->change_attr = cinfo->after;
753 spin_unlock(&dir->i_lock);
756 struct nfs4_opendata {
758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
762 struct nfs_fattr f_attr;
763 struct nfs_fattr dir_attr;
766 struct nfs4_state_owner *owner;
767 struct nfs4_state *state;
769 unsigned long timestamp;
770 unsigned int rpc_done : 1;
776 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
778 p->o_res.f_attr = &p->f_attr;
779 p->o_res.dir_attr = &p->dir_attr;
780 p->o_res.seqid = p->o_arg.seqid;
781 p->c_res.seqid = p->c_arg.seqid;
782 p->o_res.server = p->o_arg.server;
783 nfs_fattr_init(&p->f_attr);
784 nfs_fattr_init(&p->dir_attr);
787 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
788 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
789 const struct iattr *attrs,
792 struct dentry *parent = dget_parent(path->dentry);
793 struct inode *dir = parent->d_inode;
794 struct nfs_server *server = NFS_SERVER(dir);
795 struct nfs4_opendata *p;
797 p = kzalloc(sizeof(*p), gfp_mask);
800 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
801 if (p->o_arg.seqid == NULL)
807 atomic_inc(&sp->so_count);
808 p->o_arg.fh = NFS_FH(dir);
809 p->o_arg.open_flags = flags;
810 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
811 p->o_arg.clientid = server->nfs_client->cl_clientid;
812 p->o_arg.id = sp->so_owner_id.id;
813 p->o_arg.name = &p->path.dentry->d_name;
814 p->o_arg.server = server;
815 p->o_arg.bitmask = server->attr_bitmask;
816 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
817 if (flags & O_CREAT) {
820 p->o_arg.u.attrs = &p->attrs;
821 memcpy(&p->attrs, attrs, sizeof(p->attrs));
822 s = (u32 *) p->o_arg.u.verifier.data;
826 p->c_arg.fh = &p->o_res.fh;
827 p->c_arg.stateid = &p->o_res.stateid;
828 p->c_arg.seqid = p->o_arg.seqid;
829 nfs4_init_opendata_res(p);
839 static void nfs4_opendata_free(struct kref *kref)
841 struct nfs4_opendata *p = container_of(kref,
842 struct nfs4_opendata, kref);
844 nfs_free_seqid(p->o_arg.seqid);
845 if (p->state != NULL)
846 nfs4_put_open_state(p->state);
847 nfs4_put_state_owner(p->owner);
853 static void nfs4_opendata_put(struct nfs4_opendata *p)
856 kref_put(&p->kref, nfs4_opendata_free);
859 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
863 ret = rpc_wait_for_completion_task(task);
867 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
871 if (open_mode & O_EXCL)
873 switch (mode & (FMODE_READ|FMODE_WRITE)) {
875 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
876 && state->n_rdonly != 0;
879 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
880 && state->n_wronly != 0;
882 case FMODE_READ|FMODE_WRITE:
883 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
884 && state->n_rdwr != 0;
890 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
892 if ((delegation->type & fmode) != fmode)
894 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
896 nfs_mark_delegation_referenced(delegation);
900 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
909 case FMODE_READ|FMODE_WRITE:
912 nfs4_state_set_mode_locked(state, state->state | fmode);
915 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
917 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
918 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
919 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
922 set_bit(NFS_O_RDONLY_STATE, &state->flags);
925 set_bit(NFS_O_WRONLY_STATE, &state->flags);
927 case FMODE_READ|FMODE_WRITE:
928 set_bit(NFS_O_RDWR_STATE, &state->flags);
932 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
934 write_seqlock(&state->seqlock);
935 nfs_set_open_stateid_locked(state, stateid, fmode);
936 write_sequnlock(&state->seqlock);
939 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
942 * Protect the call to nfs4_state_set_mode_locked and
943 * serialise the stateid update
945 write_seqlock(&state->seqlock);
946 if (deleg_stateid != NULL) {
947 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
948 set_bit(NFS_DELEGATED_STATE, &state->flags);
950 if (open_stateid != NULL)
951 nfs_set_open_stateid_locked(state, open_stateid, fmode);
952 write_sequnlock(&state->seqlock);
953 spin_lock(&state->owner->so_lock);
954 update_open_stateflags(state, fmode);
955 spin_unlock(&state->owner->so_lock);
958 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
960 struct nfs_inode *nfsi = NFS_I(state->inode);
961 struct nfs_delegation *deleg_cur;
964 fmode &= (FMODE_READ|FMODE_WRITE);
967 deleg_cur = rcu_dereference(nfsi->delegation);
968 if (deleg_cur == NULL)
971 spin_lock(&deleg_cur->lock);
972 if (nfsi->delegation != deleg_cur ||
973 (deleg_cur->type & fmode) != fmode)
974 goto no_delegation_unlock;
976 if (delegation == NULL)
977 delegation = &deleg_cur->stateid;
978 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
979 goto no_delegation_unlock;
981 nfs_mark_delegation_referenced(deleg_cur);
982 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
984 no_delegation_unlock:
985 spin_unlock(&deleg_cur->lock);
989 if (!ret && open_stateid != NULL) {
990 __update_open_stateid(state, open_stateid, NULL, fmode);
998 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1000 struct nfs_delegation *delegation;
1003 delegation = rcu_dereference(NFS_I(inode)->delegation);
1004 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1009 nfs_inode_return_delegation(inode);
1012 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1014 struct nfs4_state *state = opendata->state;
1015 struct nfs_inode *nfsi = NFS_I(state->inode);
1016 struct nfs_delegation *delegation;
1017 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1018 fmode_t fmode = opendata->o_arg.fmode;
1019 nfs4_stateid stateid;
1023 if (can_open_cached(state, fmode, open_mode)) {
1024 spin_lock(&state->owner->so_lock);
1025 if (can_open_cached(state, fmode, open_mode)) {
1026 update_open_stateflags(state, fmode);
1027 spin_unlock(&state->owner->so_lock);
1028 goto out_return_state;
1030 spin_unlock(&state->owner->so_lock);
1033 delegation = rcu_dereference(nfsi->delegation);
1034 if (delegation == NULL ||
1035 !can_open_delegated(delegation, fmode)) {
1039 /* Save the delegation */
1040 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1042 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1047 /* Try to update the stateid using the delegation */
1048 if (update_open_stateid(state, NULL, &stateid, fmode))
1049 goto out_return_state;
1052 return ERR_PTR(ret);
1054 atomic_inc(&state->count);
1058 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1060 struct inode *inode;
1061 struct nfs4_state *state = NULL;
1062 struct nfs_delegation *delegation;
1065 if (!data->rpc_done) {
1066 state = nfs4_try_open_cached(data);
1071 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1073 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1074 ret = PTR_ERR(inode);
1078 state = nfs4_get_open_state(inode, data->owner);
1081 if (data->o_res.delegation_type != 0) {
1082 int delegation_flags = 0;
1085 delegation = rcu_dereference(NFS_I(inode)->delegation);
1087 delegation_flags = delegation->flags;
1089 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1090 nfs_inode_set_delegation(state->inode,
1091 data->owner->so_cred,
1094 nfs_inode_reclaim_delegation(state->inode,
1095 data->owner->so_cred,
1099 update_open_stateid(state, &data->o_res.stateid, NULL,
1107 return ERR_PTR(ret);
1110 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1112 struct nfs_inode *nfsi = NFS_I(state->inode);
1113 struct nfs_open_context *ctx;
1115 spin_lock(&state->inode->i_lock);
1116 list_for_each_entry(ctx, &nfsi->open_files, list) {
1117 if (ctx->state != state)
1119 get_nfs_open_context(ctx);
1120 spin_unlock(&state->inode->i_lock);
1123 spin_unlock(&state->inode->i_lock);
1124 return ERR_PTR(-ENOENT);
1127 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1129 struct nfs4_opendata *opendata;
1131 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1132 if (opendata == NULL)
1133 return ERR_PTR(-ENOMEM);
1134 opendata->state = state;
1135 atomic_inc(&state->count);
1139 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1141 struct nfs4_state *newstate;
1144 opendata->o_arg.open_flags = 0;
1145 opendata->o_arg.fmode = fmode;
1146 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1147 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1148 nfs4_init_opendata_res(opendata);
1149 ret = _nfs4_recover_proc_open(opendata);
1152 newstate = nfs4_opendata_to_nfs4_state(opendata);
1153 if (IS_ERR(newstate))
1154 return PTR_ERR(newstate);
1155 nfs4_close_state(&opendata->path, newstate, fmode);
1160 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1162 struct nfs4_state *newstate;
1165 /* memory barrier prior to reading state->n_* */
1166 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1168 if (state->n_rdwr != 0) {
1169 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1170 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1173 if (newstate != state)
1176 if (state->n_wronly != 0) {
1177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1178 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1181 if (newstate != state)
1184 if (state->n_rdonly != 0) {
1185 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1186 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1189 if (newstate != state)
1193 * We may have performed cached opens for all three recoveries.
1194 * Check if we need to update the current stateid.
1196 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1197 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1198 write_seqlock(&state->seqlock);
1199 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1200 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1201 write_sequnlock(&state->seqlock);
1208 * reclaim state on the server after a reboot.
1210 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1212 struct nfs_delegation *delegation;
1213 struct nfs4_opendata *opendata;
1214 fmode_t delegation_type = 0;
1217 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1218 if (IS_ERR(opendata))
1219 return PTR_ERR(opendata);
1220 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1221 opendata->o_arg.fh = NFS_FH(state->inode);
1223 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1224 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1225 delegation_type = delegation->type;
1227 opendata->o_arg.u.delegation_type = delegation_type;
1228 status = nfs4_open_recover(opendata, state);
1229 nfs4_opendata_put(opendata);
1233 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1235 struct nfs_server *server = NFS_SERVER(state->inode);
1236 struct nfs4_exception exception = { };
1239 err = _nfs4_do_open_reclaim(ctx, state);
1240 if (err != -NFS4ERR_DELAY)
1242 nfs4_handle_exception(server, err, &exception);
1243 } while (exception.retry);
1247 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1249 struct nfs_open_context *ctx;
1252 ctx = nfs4_state_find_open_context(state);
1254 return PTR_ERR(ctx);
1255 ret = nfs4_do_open_reclaim(ctx, state);
1256 put_nfs_open_context(ctx);
1260 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1262 struct nfs4_opendata *opendata;
1265 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1266 if (IS_ERR(opendata))
1267 return PTR_ERR(opendata);
1268 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1269 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1270 sizeof(opendata->o_arg.u.delegation.data));
1271 ret = nfs4_open_recover(opendata, state);
1272 nfs4_opendata_put(opendata);
1276 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1278 struct nfs4_exception exception = { };
1279 struct nfs_server *server = NFS_SERVER(state->inode);
1282 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1288 case -NFS4ERR_BADSESSION:
1289 case -NFS4ERR_BADSLOT:
1290 case -NFS4ERR_BAD_HIGH_SLOT:
1291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1292 case -NFS4ERR_DEADSESSION:
1293 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1295 case -NFS4ERR_STALE_CLIENTID:
1296 case -NFS4ERR_STALE_STATEID:
1297 case -NFS4ERR_EXPIRED:
1298 /* Don't recall a delegation if it was lost */
1299 nfs4_schedule_lease_recovery(server->nfs_client);
1303 * The show must go on: exit, but mark the
1304 * stateid as needing recovery.
1306 case -NFS4ERR_ADMIN_REVOKED:
1307 case -NFS4ERR_BAD_STATEID:
1308 nfs4_schedule_stateid_recovery(server, state);
1311 * User RPCSEC_GSS context has expired.
1312 * We cannot recover this stateid now, so
1313 * skip it and allow recovery thread to
1320 err = nfs4_handle_exception(server, err, &exception);
1321 } while (exception.retry);
1326 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1328 struct nfs4_opendata *data = calldata;
1330 data->rpc_status = task->tk_status;
1331 if (data->rpc_status == 0) {
1332 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1333 sizeof(data->o_res.stateid.data));
1334 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1335 renew_lease(data->o_res.server, data->timestamp);
1340 static void nfs4_open_confirm_release(void *calldata)
1342 struct nfs4_opendata *data = calldata;
1343 struct nfs4_state *state = NULL;
1345 /* If this request hasn't been cancelled, do nothing */
1346 if (data->cancelled == 0)
1348 /* In case of error, no cleanup! */
1349 if (!data->rpc_done)
1351 state = nfs4_opendata_to_nfs4_state(data);
1353 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1355 nfs4_opendata_put(data);
1358 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1359 .rpc_call_done = nfs4_open_confirm_done,
1360 .rpc_release = nfs4_open_confirm_release,
1364 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1366 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1368 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1369 struct rpc_task *task;
1370 struct rpc_message msg = {
1371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1372 .rpc_argp = &data->c_arg,
1373 .rpc_resp = &data->c_res,
1374 .rpc_cred = data->owner->so_cred,
1376 struct rpc_task_setup task_setup_data = {
1377 .rpc_client = server->client,
1378 .rpc_message = &msg,
1379 .callback_ops = &nfs4_open_confirm_ops,
1380 .callback_data = data,
1381 .workqueue = nfsiod_workqueue,
1382 .flags = RPC_TASK_ASYNC,
1386 kref_get(&data->kref);
1388 data->rpc_status = 0;
1389 data->timestamp = jiffies;
1390 task = rpc_run_task(&task_setup_data);
1392 return PTR_ERR(task);
1393 status = nfs4_wait_for_completion_rpc_task(task);
1395 data->cancelled = 1;
1398 status = data->rpc_status;
1403 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1405 struct nfs4_opendata *data = calldata;
1406 struct nfs4_state_owner *sp = data->owner;
1408 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1411 * Check if we still need to send an OPEN call, or if we can use
1412 * a delegation instead.
1414 if (data->state != NULL) {
1415 struct nfs_delegation *delegation;
1417 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1420 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1421 if (delegation != NULL &&
1422 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1428 /* Update sequence id. */
1429 data->o_arg.id = sp->so_owner_id.id;
1430 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1431 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1432 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1433 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1435 data->timestamp = jiffies;
1436 if (nfs4_setup_sequence(data->o_arg.server,
1437 &data->o_arg.seq_args,
1438 &data->o_res.seq_res, 1, task))
1440 rpc_call_start(task);
1443 task->tk_action = NULL;
1447 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1449 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1450 nfs4_open_prepare(task, calldata);
1453 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1455 struct nfs4_opendata *data = calldata;
1457 data->rpc_status = task->tk_status;
1459 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1462 if (task->tk_status == 0) {
1463 switch (data->o_res.f_attr->mode & S_IFMT) {
1467 data->rpc_status = -ELOOP;
1470 data->rpc_status = -EISDIR;
1473 data->rpc_status = -ENOTDIR;
1475 renew_lease(data->o_res.server, data->timestamp);
1476 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1477 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1482 static void nfs4_open_release(void *calldata)
1484 struct nfs4_opendata *data = calldata;
1485 struct nfs4_state *state = NULL;
1487 /* If this request hasn't been cancelled, do nothing */
1488 if (data->cancelled == 0)
1490 /* In case of error, no cleanup! */
1491 if (data->rpc_status != 0 || !data->rpc_done)
1493 /* In case we need an open_confirm, no cleanup! */
1494 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1496 state = nfs4_opendata_to_nfs4_state(data);
1498 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1500 nfs4_opendata_put(data);
1503 static const struct rpc_call_ops nfs4_open_ops = {
1504 .rpc_call_prepare = nfs4_open_prepare,
1505 .rpc_call_done = nfs4_open_done,
1506 .rpc_release = nfs4_open_release,
1509 static const struct rpc_call_ops nfs4_recover_open_ops = {
1510 .rpc_call_prepare = nfs4_recover_open_prepare,
1511 .rpc_call_done = nfs4_open_done,
1512 .rpc_release = nfs4_open_release,
1515 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1517 struct inode *dir = data->dir->d_inode;
1518 struct nfs_server *server = NFS_SERVER(dir);
1519 struct nfs_openargs *o_arg = &data->o_arg;
1520 struct nfs_openres *o_res = &data->o_res;
1521 struct rpc_task *task;
1522 struct rpc_message msg = {
1523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1526 .rpc_cred = data->owner->so_cred,
1528 struct rpc_task_setup task_setup_data = {
1529 .rpc_client = server->client,
1530 .rpc_message = &msg,
1531 .callback_ops = &nfs4_open_ops,
1532 .callback_data = data,
1533 .workqueue = nfsiod_workqueue,
1534 .flags = RPC_TASK_ASYNC,
1538 kref_get(&data->kref);
1540 data->rpc_status = 0;
1541 data->cancelled = 0;
1543 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1544 task = rpc_run_task(&task_setup_data);
1546 return PTR_ERR(task);
1547 status = nfs4_wait_for_completion_rpc_task(task);
1549 data->cancelled = 1;
1552 status = data->rpc_status;
1558 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1560 struct inode *dir = data->dir->d_inode;
1561 struct nfs_openres *o_res = &data->o_res;
1564 status = nfs4_run_open_task(data, 1);
1565 if (status != 0 || !data->rpc_done)
1568 nfs_refresh_inode(dir, o_res->dir_attr);
1570 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1571 status = _nfs4_proc_open_confirm(data);
1580 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1582 static int _nfs4_proc_open(struct nfs4_opendata *data)
1584 struct inode *dir = data->dir->d_inode;
1585 struct nfs_server *server = NFS_SERVER(dir);
1586 struct nfs_openargs *o_arg = &data->o_arg;
1587 struct nfs_openres *o_res = &data->o_res;
1590 status = nfs4_run_open_task(data, 0);
1591 if (status != 0 || !data->rpc_done)
1594 if (o_arg->open_flags & O_CREAT) {
1595 update_changeattr(dir, &o_res->cinfo);
1596 nfs_post_op_update_inode(dir, o_res->dir_attr);
1598 nfs_refresh_inode(dir, o_res->dir_attr);
1599 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1600 server->caps &= ~NFS_CAP_POSIX_LOCK;
1601 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1602 status = _nfs4_proc_open_confirm(data);
1606 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1607 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1611 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1616 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1617 ret = nfs4_wait_clnt_recover(clp);
1620 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1621 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1623 nfs4_schedule_state_manager(clp);
1629 static int nfs4_recover_expired_lease(struct nfs_server *server)
1631 return nfs4_client_recover_expired_lease(server->nfs_client);
1636 * reclaim state on the server after a network partition.
1637 * Assumes caller holds the appropriate lock
1639 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1641 struct nfs4_opendata *opendata;
1644 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1645 if (IS_ERR(opendata))
1646 return PTR_ERR(opendata);
1647 ret = nfs4_open_recover(opendata, state);
1649 d_drop(ctx->path.dentry);
1650 nfs4_opendata_put(opendata);
1654 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1656 struct nfs_server *server = NFS_SERVER(state->inode);
1657 struct nfs4_exception exception = { };
1661 err = _nfs4_open_expired(ctx, state);
1665 case -NFS4ERR_GRACE:
1666 case -NFS4ERR_DELAY:
1667 nfs4_handle_exception(server, err, &exception);
1670 } while (exception.retry);
1675 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1677 struct nfs_open_context *ctx;
1680 ctx = nfs4_state_find_open_context(state);
1682 return PTR_ERR(ctx);
1683 ret = nfs4_do_open_expired(ctx, state);
1684 put_nfs_open_context(ctx);
1689 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1690 * fields corresponding to attributes that were used to store the verifier.
1691 * Make sure we clobber those fields in the later setattr call
1693 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1695 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1696 !(sattr->ia_valid & ATTR_ATIME_SET))
1697 sattr->ia_valid |= ATTR_ATIME;
1699 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1700 !(sattr->ia_valid & ATTR_MTIME_SET))
1701 sattr->ia_valid |= ATTR_MTIME;
1705 * Returns a referenced nfs4_state
1707 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1709 struct nfs4_state_owner *sp;
1710 struct nfs4_state *state = NULL;
1711 struct nfs_server *server = NFS_SERVER(dir);
1712 struct nfs4_opendata *opendata;
1715 /* Protect against reboot recovery conflicts */
1717 if (!(sp = nfs4_get_state_owner(server, cred))) {
1718 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1721 status = nfs4_recover_expired_lease(server);
1723 goto err_put_state_owner;
1724 if (path->dentry->d_inode != NULL)
1725 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1727 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1728 if (opendata == NULL)
1729 goto err_put_state_owner;
1731 if (path->dentry->d_inode != NULL)
1732 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1734 status = _nfs4_proc_open(opendata);
1736 goto err_opendata_put;
1738 state = nfs4_opendata_to_nfs4_state(opendata);
1739 status = PTR_ERR(state);
1741 goto err_opendata_put;
1742 if (server->caps & NFS_CAP_POSIX_LOCK)
1743 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1745 if (opendata->o_arg.open_flags & O_EXCL) {
1746 nfs4_exclusive_attrset(opendata, sattr);
1748 nfs_fattr_init(opendata->o_res.f_attr);
1749 status = nfs4_do_setattr(state->inode, cred,
1750 opendata->o_res.f_attr, sattr,
1753 nfs_setattr_update_inode(state->inode, sattr);
1754 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1756 nfs4_opendata_put(opendata);
1757 nfs4_put_state_owner(sp);
1761 nfs4_opendata_put(opendata);
1762 err_put_state_owner:
1763 nfs4_put_state_owner(sp);
1770 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1772 struct nfs4_exception exception = { };
1773 struct nfs4_state *res;
1777 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1780 /* NOTE: BAD_SEQID means the server and client disagree about the
1781 * book-keeping w.r.t. state-changing operations
1782 * (OPEN/CLOSE/LOCK/LOCKU...)
1783 * It is actually a sign of a bug on the client or on the server.
1785 * If we receive a BAD_SEQID error in the particular case of
1786 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1787 * have unhashed the old state_owner for us, and that we can
1788 * therefore safely retry using a new one. We should still warn
1789 * the user though...
1791 if (status == -NFS4ERR_BAD_SEQID) {
1792 printk(KERN_WARNING "NFS: v4 server %s "
1793 " returned a bad sequence-id error!\n",
1794 NFS_SERVER(dir)->nfs_client->cl_hostname);
1795 exception.retry = 1;
1799 * BAD_STATEID on OPEN means that the server cancelled our
1800 * state before it received the OPEN_CONFIRM.
1801 * Recover by retrying the request as per the discussion
1802 * on Page 181 of RFC3530.
1804 if (status == -NFS4ERR_BAD_STATEID) {
1805 exception.retry = 1;
1808 if (status == -EAGAIN) {
1809 /* We must have found a delegation */
1810 exception.retry = 1;
1813 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1814 status, &exception));
1815 } while (exception.retry);
1819 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1820 struct nfs_fattr *fattr, struct iattr *sattr,
1821 struct nfs4_state *state)
1823 struct nfs_server *server = NFS_SERVER(inode);
1824 struct nfs_setattrargs arg = {
1825 .fh = NFS_FH(inode),
1828 .bitmask = server->attr_bitmask,
1830 struct nfs_setattrres res = {
1834 struct rpc_message msg = {
1835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1840 unsigned long timestamp = jiffies;
1843 nfs_fattr_init(fattr);
1845 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1846 /* Use that stateid */
1847 } else if (state != NULL) {
1848 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1850 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1852 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1853 if (status == 0 && state != NULL)
1854 renew_lease(server, timestamp);
1858 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1859 struct nfs_fattr *fattr, struct iattr *sattr,
1860 struct nfs4_state *state)
1862 struct nfs_server *server = NFS_SERVER(inode);
1863 struct nfs4_exception exception = { };
1866 err = nfs4_handle_exception(server,
1867 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1869 } while (exception.retry);
1873 struct nfs4_closedata {
1875 struct inode *inode;
1876 struct nfs4_state *state;
1877 struct nfs_closeargs arg;
1878 struct nfs_closeres res;
1879 struct nfs_fattr fattr;
1880 unsigned long timestamp;
1885 static void nfs4_free_closedata(void *data)
1887 struct nfs4_closedata *calldata = data;
1888 struct nfs4_state_owner *sp = calldata->state->owner;
1891 pnfs_roc_release(calldata->state->inode);
1892 nfs4_put_open_state(calldata->state);
1893 nfs_free_seqid(calldata->arg.seqid);
1894 nfs4_put_state_owner(sp);
1895 path_put(&calldata->path);
1899 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1902 spin_lock(&state->owner->so_lock);
1903 if (!(fmode & FMODE_READ))
1904 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1905 if (!(fmode & FMODE_WRITE))
1906 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1907 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1908 spin_unlock(&state->owner->so_lock);
1911 static void nfs4_close_done(struct rpc_task *task, void *data)
1913 struct nfs4_closedata *calldata = data;
1914 struct nfs4_state *state = calldata->state;
1915 struct nfs_server *server = NFS_SERVER(calldata->inode);
1917 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1919 /* hmm. we are done with the inode, and in the process of freeing
1920 * the state_owner. we keep this around to process errors
1922 switch (task->tk_status) {
1925 pnfs_roc_set_barrier(state->inode,
1926 calldata->roc_barrier);
1927 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1928 renew_lease(server, calldata->timestamp);
1929 nfs4_close_clear_stateid_flags(state,
1930 calldata->arg.fmode);
1932 case -NFS4ERR_STALE_STATEID:
1933 case -NFS4ERR_OLD_STATEID:
1934 case -NFS4ERR_BAD_STATEID:
1935 case -NFS4ERR_EXPIRED:
1936 if (calldata->arg.fmode == 0)
1939 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1940 rpc_restart_call_prepare(task);
1942 nfs_release_seqid(calldata->arg.seqid);
1943 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1946 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1948 struct nfs4_closedata *calldata = data;
1949 struct nfs4_state *state = calldata->state;
1952 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1955 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1956 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1957 spin_lock(&state->owner->so_lock);
1958 /* Calculate the change in open mode */
1959 if (state->n_rdwr == 0) {
1960 if (state->n_rdonly == 0) {
1961 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1962 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1963 calldata->arg.fmode &= ~FMODE_READ;
1965 if (state->n_wronly == 0) {
1966 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1967 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1968 calldata->arg.fmode &= ~FMODE_WRITE;
1971 spin_unlock(&state->owner->so_lock);
1974 /* Note: exit _without_ calling nfs4_close_done */
1975 task->tk_action = NULL;
1979 if (calldata->arg.fmode == 0) {
1980 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1981 if (calldata->roc &&
1982 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1983 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1989 nfs_fattr_init(calldata->res.fattr);
1990 calldata->timestamp = jiffies;
1991 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1992 &calldata->arg.seq_args, &calldata->res.seq_res,
1995 rpc_call_start(task);
1998 static const struct rpc_call_ops nfs4_close_ops = {
1999 .rpc_call_prepare = nfs4_close_prepare,
2000 .rpc_call_done = nfs4_close_done,
2001 .rpc_release = nfs4_free_closedata,
2005 * It is possible for data to be read/written from a mem-mapped file
2006 * after the sys_close call (which hits the vfs layer as a flush).
2007 * This means that we can't safely call nfsv4 close on a file until
2008 * the inode is cleared. This in turn means that we are not good
2009 * NFSv4 citizens - we do not indicate to the server to update the file's
2010 * share state even when we are done with one of the three share
2011 * stateid's in the inode.
2013 * NOTE: Caller must be holding the sp->so_owner semaphore!
2015 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2017 struct nfs_server *server = NFS_SERVER(state->inode);
2018 struct nfs4_closedata *calldata;
2019 struct nfs4_state_owner *sp = state->owner;
2020 struct rpc_task *task;
2021 struct rpc_message msg = {
2022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2023 .rpc_cred = state->owner->so_cred,
2025 struct rpc_task_setup task_setup_data = {
2026 .rpc_client = server->client,
2027 .rpc_message = &msg,
2028 .callback_ops = &nfs4_close_ops,
2029 .workqueue = nfsiod_workqueue,
2030 .flags = RPC_TASK_ASYNC,
2032 int status = -ENOMEM;
2034 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2035 if (calldata == NULL)
2037 calldata->inode = state->inode;
2038 calldata->state = state;
2039 calldata->arg.fh = NFS_FH(state->inode);
2040 calldata->arg.stateid = &state->open_stateid;
2041 /* Serialization for the sequence id */
2042 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2043 if (calldata->arg.seqid == NULL)
2044 goto out_free_calldata;
2045 calldata->arg.fmode = 0;
2046 calldata->arg.bitmask = server->cache_consistency_bitmask;
2047 calldata->res.fattr = &calldata->fattr;
2048 calldata->res.seqid = calldata->arg.seqid;
2049 calldata->res.server = server;
2050 calldata->roc = roc;
2052 calldata->path = *path;
2054 msg.rpc_argp = &calldata->arg;
2055 msg.rpc_resp = &calldata->res;
2056 task_setup_data.callback_data = calldata;
2057 task = rpc_run_task(&task_setup_data);
2059 return PTR_ERR(task);
2062 status = rpc_wait_for_completion_task(task);
2069 pnfs_roc_release(state->inode);
2070 nfs4_put_open_state(state);
2071 nfs4_put_state_owner(sp);
2075 static struct inode *
2076 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2078 struct nfs4_state *state;
2080 /* Protect against concurrent sillydeletes */
2081 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2083 return ERR_CAST(state);
2085 return igrab(state->inode);
2088 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2090 if (ctx->state == NULL)
2093 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2095 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2098 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2100 struct nfs4_server_caps_arg args = {
2103 struct nfs4_server_caps_res res = {};
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2111 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2113 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2114 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2115 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2116 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2117 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2118 NFS_CAP_CTIME|NFS_CAP_MTIME);
2119 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2120 server->caps |= NFS_CAP_ACLS;
2121 if (res.has_links != 0)
2122 server->caps |= NFS_CAP_HARDLINKS;
2123 if (res.has_symlinks != 0)
2124 server->caps |= NFS_CAP_SYMLINKS;
2125 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2126 server->caps |= NFS_CAP_FILEID;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2128 server->caps |= NFS_CAP_MODE;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2130 server->caps |= NFS_CAP_NLINK;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2132 server->caps |= NFS_CAP_OWNER;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2134 server->caps |= NFS_CAP_OWNER_GROUP;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2136 server->caps |= NFS_CAP_ATIME;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2138 server->caps |= NFS_CAP_CTIME;
2139 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2140 server->caps |= NFS_CAP_MTIME;
2142 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2143 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2144 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2145 server->acl_bitmask = res.acl_bitmask;
2151 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2153 struct nfs4_exception exception = { };
2156 err = nfs4_handle_exception(server,
2157 _nfs4_server_capabilities(server, fhandle),
2159 } while (exception.retry);
2163 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2164 struct nfs_fsinfo *info)
2166 struct nfs4_lookup_root_arg args = {
2167 .bitmask = nfs4_fattr_bitmap,
2169 struct nfs4_lookup_res res = {
2171 .fattr = info->fattr,
2174 struct rpc_message msg = {
2175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2180 nfs_fattr_init(info->fattr);
2181 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2184 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2185 struct nfs_fsinfo *info)
2187 struct nfs4_exception exception = { };
2190 err = _nfs4_lookup_root(server, fhandle, info);
2193 case -NFS4ERR_WRONGSEC:
2196 err = nfs4_handle_exception(server, err, &exception);
2198 } while (exception.retry);
2202 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2203 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2205 struct rpc_auth *auth;
2208 auth = rpcauth_create(flavor, server->client);
2213 ret = nfs4_lookup_root(server, fhandle, info);
2218 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2219 struct nfs_fsinfo *info)
2221 int i, len, status = 0;
2222 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2224 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2225 flav_array[len] = RPC_AUTH_NULL;
2228 for (i = 0; i < len; i++) {
2229 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2230 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2235 * -EACCESS could mean that the user doesn't have correct permissions
2236 * to access the mount. It could also mean that we tried to mount
2237 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2238 * existing mount programs don't handle -EACCES very well so it should
2239 * be mapped to -EPERM instead.
2241 if (status == -EACCES)
2247 * get the file handle for the "/" directory on the server
2249 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2250 struct nfs_fsinfo *info)
2252 int status = nfs4_lookup_root(server, fhandle, info);
2253 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2255 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2256 * by nfs4_map_errors() as this function exits.
2258 status = nfs4_find_root_sec(server, fhandle, info);
2260 status = nfs4_server_capabilities(server, fhandle);
2262 status = nfs4_do_fsinfo(server, fhandle, info);
2263 return nfs4_map_errors(status);
2267 * Get locations and (maybe) other attributes of a referral.
2268 * Note that we'll actually follow the referral later when
2269 * we detect fsid mismatch in inode revalidation
2271 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2273 int status = -ENOMEM;
2274 struct page *page = NULL;
2275 struct nfs4_fs_locations *locations = NULL;
2277 page = alloc_page(GFP_KERNEL);
2280 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2281 if (locations == NULL)
2284 status = nfs4_proc_fs_locations(dir, name, locations, page);
2287 /* Make sure server returned a different fsid for the referral */
2288 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2289 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2294 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2295 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2297 fattr->mode = S_IFDIR;
2298 memset(fhandle, 0, sizeof(struct nfs_fh));
2306 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2308 struct nfs4_getattr_arg args = {
2310 .bitmask = server->attr_bitmask,
2312 struct nfs4_getattr_res res = {
2316 struct rpc_message msg = {
2317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2322 nfs_fattr_init(fattr);
2323 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2326 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2328 struct nfs4_exception exception = { };
2331 err = nfs4_handle_exception(server,
2332 _nfs4_proc_getattr(server, fhandle, fattr),
2334 } while (exception.retry);
2339 * The file is not closed if it is opened due to the a request to change
2340 * the size of the file. The open call will not be needed once the
2341 * VFS layer lookup-intents are implemented.
2343 * Close is called when the inode is destroyed.
2344 * If we haven't opened the file for O_WRONLY, we
2345 * need to in the size_change case to obtain a stateid.
2348 * Because OPEN is always done by name in nfsv4, it is
2349 * possible that we opened a different file by the same
2350 * name. We can recognize this race condition, but we
2351 * can't do anything about it besides returning an error.
2353 * This will be fixed with VFS changes (lookup-intent).
2356 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2357 struct iattr *sattr)
2359 struct inode *inode = dentry->d_inode;
2360 struct rpc_cred *cred = NULL;
2361 struct nfs4_state *state = NULL;
2364 if (pnfs_ld_layoutret_on_setattr(inode))
2365 pnfs_return_layout(inode);
2367 nfs_fattr_init(fattr);
2369 /* Search for an existing open(O_WRITE) file */
2370 if (sattr->ia_valid & ATTR_FILE) {
2371 struct nfs_open_context *ctx;
2373 ctx = nfs_file_open_context(sattr->ia_file);
2380 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2382 nfs_setattr_update_inode(inode, sattr);
2386 static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2387 const struct nfs_fh *dirfh, const struct qstr *name,
2388 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2391 struct nfs4_lookup_arg args = {
2392 .bitmask = server->attr_bitmask,
2396 struct nfs4_lookup_res res = {
2401 struct rpc_message msg = {
2402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2407 nfs_fattr_init(fattr);
2409 dprintk("NFS call lookupfh %s\n", name->name);
2410 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2411 dprintk("NFS reply lookupfh: %d\n", status);
2415 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2416 struct qstr *name, struct nfs_fh *fhandle,
2417 struct nfs_fattr *fattr)
2419 struct nfs4_exception exception = { };
2422 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
2424 if (err == -NFS4ERR_MOVED) {
2428 err = nfs4_handle_exception(server, err, &exception);
2429 } while (exception.retry);
2433 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2434 const struct qstr *name, struct nfs_fh *fhandle,
2435 struct nfs_fattr *fattr)
2439 dprintk("NFS call lookup %s\n", name->name);
2440 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2441 if (status == -NFS4ERR_MOVED)
2442 status = nfs4_get_referral(dir, name, fattr, fhandle);
2443 dprintk("NFS reply lookup: %d\n", status);
2447 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2449 memset(fh, 0, sizeof(struct nfs_fh));
2450 fattr->fsid.major = 1;
2451 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2452 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2453 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2457 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2458 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2460 struct nfs4_exception exception = { };
2463 err = nfs4_handle_exception(NFS_SERVER(dir),
2464 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
2467 nfs_fixup_secinfo_attributes(fattr, fhandle);
2468 } while (exception.retry);
2472 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2474 struct nfs_server *server = NFS_SERVER(inode);
2475 struct nfs4_accessargs args = {
2476 .fh = NFS_FH(inode),
2477 .bitmask = server->attr_bitmask,
2479 struct nfs4_accessres res = {
2482 struct rpc_message msg = {
2483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2486 .rpc_cred = entry->cred,
2488 int mode = entry->mask;
2492 * Determine which access bits we want to ask for...
2494 if (mode & MAY_READ)
2495 args.access |= NFS4_ACCESS_READ;
2496 if (S_ISDIR(inode->i_mode)) {
2497 if (mode & MAY_WRITE)
2498 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2499 if (mode & MAY_EXEC)
2500 args.access |= NFS4_ACCESS_LOOKUP;
2502 if (mode & MAY_WRITE)
2503 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2504 if (mode & MAY_EXEC)
2505 args.access |= NFS4_ACCESS_EXECUTE;
2508 res.fattr = nfs_alloc_fattr();
2509 if (res.fattr == NULL)
2512 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2515 if (res.access & NFS4_ACCESS_READ)
2516 entry->mask |= MAY_READ;
2517 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2518 entry->mask |= MAY_WRITE;
2519 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2520 entry->mask |= MAY_EXEC;
2521 nfs_refresh_inode(inode, res.fattr);
2523 nfs_free_fattr(res.fattr);
2527 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2529 struct nfs4_exception exception = { };
2532 err = nfs4_handle_exception(NFS_SERVER(inode),
2533 _nfs4_proc_access(inode, entry),
2535 } while (exception.retry);
2540 * TODO: For the time being, we don't try to get any attributes
2541 * along with any of the zero-copy operations READ, READDIR,
2544 * In the case of the first three, we want to put the GETATTR
2545 * after the read-type operation -- this is because it is hard
2546 * to predict the length of a GETATTR response in v4, and thus
2547 * align the READ data correctly. This means that the GETATTR
2548 * may end up partially falling into the page cache, and we should
2549 * shift it into the 'tail' of the xdr_buf before processing.
2550 * To do this efficiently, we need to know the total length
2551 * of data received, which doesn't seem to be available outside
2554 * In the case of WRITE, we also want to put the GETATTR after
2555 * the operation -- in this case because we want to make sure
2556 * we get the post-operation mtime and size. This means that
2557 * we can't use xdr_encode_pages() as written: we need a variant
2558 * of it which would leave room in the 'tail' iovec.
2560 * Both of these changes to the XDR layer would in fact be quite
2561 * minor, but I decided to leave them for a subsequent patch.
2563 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2564 unsigned int pgbase, unsigned int pglen)
2566 struct nfs4_readlink args = {
2567 .fh = NFS_FH(inode),
2572 struct nfs4_readlink_res res;
2573 struct rpc_message msg = {
2574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2579 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2582 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2583 unsigned int pgbase, unsigned int pglen)
2585 struct nfs4_exception exception = { };
2588 err = nfs4_handle_exception(NFS_SERVER(inode),
2589 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2591 } while (exception.retry);
2597 * We will need to arrange for the VFS layer to provide an atomic open.
2598 * Until then, this create/open method is prone to inefficiency and race
2599 * conditions due to the lookup, create, and open VFS calls from sys_open()
2600 * placed on the wire.
2602 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2603 * The file will be opened again in the subsequent VFS open call
2604 * (nfs4_proc_file_open).
2606 * The open for read will just hang around to be used by any process that
2607 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2611 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2612 int flags, struct nfs_open_context *ctx)
2614 struct path my_path = {
2617 struct path *path = &my_path;
2618 struct nfs4_state *state;
2619 struct rpc_cred *cred = NULL;
2628 sattr->ia_mode &= ~current_umask();
2629 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2631 if (IS_ERR(state)) {
2632 status = PTR_ERR(state);
2635 d_add(dentry, igrab(state->inode));
2636 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2640 nfs4_close_sync(path, state, fmode);
2645 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2647 struct nfs_server *server = NFS_SERVER(dir);
2648 struct nfs_removeargs args = {
2650 .name.len = name->len,
2651 .name.name = name->name,
2652 .bitmask = server->attr_bitmask,
2654 struct nfs_removeres res = {
2657 struct rpc_message msg = {
2658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2662 int status = -ENOMEM;
2664 res.dir_attr = nfs_alloc_fattr();
2665 if (res.dir_attr == NULL)
2668 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2670 update_changeattr(dir, &res.cinfo);
2671 nfs_post_op_update_inode(dir, res.dir_attr);
2673 nfs_free_fattr(res.dir_attr);
2678 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2680 struct nfs4_exception exception = { };
2683 err = nfs4_handle_exception(NFS_SERVER(dir),
2684 _nfs4_proc_remove(dir, name),
2686 } while (exception.retry);
2690 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2692 struct nfs_server *server = NFS_SERVER(dir);
2693 struct nfs_removeargs *args = msg->rpc_argp;
2694 struct nfs_removeres *res = msg->rpc_resp;
2696 args->bitmask = server->cache_consistency_bitmask;
2697 res->server = server;
2698 res->seq_res.sr_slot = NULL;
2699 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2702 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2704 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2706 if (!nfs4_sequence_done(task, &res->seq_res))
2708 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2710 update_changeattr(dir, &res->cinfo);
2711 nfs_post_op_update_inode(dir, res->dir_attr);
2715 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2717 struct nfs_server *server = NFS_SERVER(dir);
2718 struct nfs_renameargs *arg = msg->rpc_argp;
2719 struct nfs_renameres *res = msg->rpc_resp;
2721 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2722 arg->bitmask = server->attr_bitmask;
2723 res->server = server;
2726 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2727 struct inode *new_dir)
2729 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2731 if (!nfs4_sequence_done(task, &res->seq_res))
2733 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2736 update_changeattr(old_dir, &res->old_cinfo);
2737 nfs_post_op_update_inode(old_dir, res->old_fattr);
2738 update_changeattr(new_dir, &res->new_cinfo);
2739 nfs_post_op_update_inode(new_dir, res->new_fattr);
2743 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2744 struct inode *new_dir, struct qstr *new_name)
2746 struct nfs_server *server = NFS_SERVER(old_dir);
2747 struct nfs_renameargs arg = {
2748 .old_dir = NFS_FH(old_dir),
2749 .new_dir = NFS_FH(new_dir),
2750 .old_name = old_name,
2751 .new_name = new_name,
2752 .bitmask = server->attr_bitmask,
2754 struct nfs_renameres res = {
2757 struct rpc_message msg = {
2758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2762 int status = -ENOMEM;
2764 res.old_fattr = nfs_alloc_fattr();
2765 res.new_fattr = nfs_alloc_fattr();
2766 if (res.old_fattr == NULL || res.new_fattr == NULL)
2769 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2771 update_changeattr(old_dir, &res.old_cinfo);
2772 nfs_post_op_update_inode(old_dir, res.old_fattr);
2773 update_changeattr(new_dir, &res.new_cinfo);
2774 nfs_post_op_update_inode(new_dir, res.new_fattr);
2777 nfs_free_fattr(res.new_fattr);
2778 nfs_free_fattr(res.old_fattr);
2782 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2783 struct inode *new_dir, struct qstr *new_name)
2785 struct nfs4_exception exception = { };
2788 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2789 _nfs4_proc_rename(old_dir, old_name,
2792 } while (exception.retry);
2796 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2798 struct nfs_server *server = NFS_SERVER(inode);
2799 struct nfs4_link_arg arg = {
2800 .fh = NFS_FH(inode),
2801 .dir_fh = NFS_FH(dir),
2803 .bitmask = server->attr_bitmask,
2805 struct nfs4_link_res res = {
2808 struct rpc_message msg = {
2809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2813 int status = -ENOMEM;
2815 res.fattr = nfs_alloc_fattr();
2816 res.dir_attr = nfs_alloc_fattr();
2817 if (res.fattr == NULL || res.dir_attr == NULL)
2820 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2822 update_changeattr(dir, &res.cinfo);
2823 nfs_post_op_update_inode(dir, res.dir_attr);
2824 nfs_post_op_update_inode(inode, res.fattr);
2827 nfs_free_fattr(res.dir_attr);
2828 nfs_free_fattr(res.fattr);
2832 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2834 struct nfs4_exception exception = { };
2837 err = nfs4_handle_exception(NFS_SERVER(inode),
2838 _nfs4_proc_link(inode, dir, name),
2840 } while (exception.retry);
2844 struct nfs4_createdata {
2845 struct rpc_message msg;
2846 struct nfs4_create_arg arg;
2847 struct nfs4_create_res res;
2849 struct nfs_fattr fattr;
2850 struct nfs_fattr dir_fattr;
2853 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2854 struct qstr *name, struct iattr *sattr, u32 ftype)
2856 struct nfs4_createdata *data;
2858 data = kzalloc(sizeof(*data), GFP_KERNEL);
2860 struct nfs_server *server = NFS_SERVER(dir);
2862 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2863 data->msg.rpc_argp = &data->arg;
2864 data->msg.rpc_resp = &data->res;
2865 data->arg.dir_fh = NFS_FH(dir);
2866 data->arg.server = server;
2867 data->arg.name = name;
2868 data->arg.attrs = sattr;
2869 data->arg.ftype = ftype;
2870 data->arg.bitmask = server->attr_bitmask;
2871 data->res.server = server;
2872 data->res.fh = &data->fh;
2873 data->res.fattr = &data->fattr;
2874 data->res.dir_fattr = &data->dir_fattr;
2875 nfs_fattr_init(data->res.fattr);
2876 nfs_fattr_init(data->res.dir_fattr);
2881 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2883 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2884 &data->arg.seq_args, &data->res.seq_res, 1);
2886 update_changeattr(dir, &data->res.dir_cinfo);
2887 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2888 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2893 static void nfs4_free_createdata(struct nfs4_createdata *data)
2898 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2899 struct page *page, unsigned int len, struct iattr *sattr)
2901 struct nfs4_createdata *data;
2902 int status = -ENAMETOOLONG;
2904 if (len > NFS4_MAXPATHLEN)
2908 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2912 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2913 data->arg.u.symlink.pages = &page;
2914 data->arg.u.symlink.len = len;
2916 status = nfs4_do_create(dir, dentry, data);
2918 nfs4_free_createdata(data);
2923 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2924 struct page *page, unsigned int len, struct iattr *sattr)
2926 struct nfs4_exception exception = { };
2929 err = nfs4_handle_exception(NFS_SERVER(dir),
2930 _nfs4_proc_symlink(dir, dentry, page,
2933 } while (exception.retry);
2937 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2938 struct iattr *sattr)
2940 struct nfs4_createdata *data;
2941 int status = -ENOMEM;
2943 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2947 status = nfs4_do_create(dir, dentry, data);
2949 nfs4_free_createdata(data);
2954 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2955 struct iattr *sattr)
2957 struct nfs4_exception exception = { };
2960 sattr->ia_mode &= ~current_umask();
2962 err = nfs4_handle_exception(NFS_SERVER(dir),
2963 _nfs4_proc_mkdir(dir, dentry, sattr),
2965 } while (exception.retry);
2969 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2970 u64 cookie, struct page **pages, unsigned int count, int plus)
2972 struct inode *dir = dentry->d_inode;
2973 struct nfs4_readdir_arg args = {
2978 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2981 struct nfs4_readdir_res res;
2982 struct rpc_message msg = {
2983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2990 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2991 dentry->d_parent->d_name.name,
2992 dentry->d_name.name,
2993 (unsigned long long)cookie);
2994 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2995 res.pgbase = args.pgbase;
2996 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
2998 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2999 status += args.pgbase;
3002 nfs_invalidate_atime(dir);
3004 dprintk("%s: returns %d\n", __func__, status);
3008 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3009 u64 cookie, struct page **pages, unsigned int count, int plus)
3011 struct nfs4_exception exception = { };
3014 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3015 _nfs4_proc_readdir(dentry, cred, cookie,
3016 pages, count, plus),
3018 } while (exception.retry);
3022 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3023 struct iattr *sattr, dev_t rdev)
3025 struct nfs4_createdata *data;
3026 int mode = sattr->ia_mode;
3027 int status = -ENOMEM;
3029 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3030 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3032 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3037 data->arg.ftype = NF4FIFO;
3038 else if (S_ISBLK(mode)) {
3039 data->arg.ftype = NF4BLK;
3040 data->arg.u.device.specdata1 = MAJOR(rdev);
3041 data->arg.u.device.specdata2 = MINOR(rdev);
3043 else if (S_ISCHR(mode)) {
3044 data->arg.ftype = NF4CHR;
3045 data->arg.u.device.specdata1 = MAJOR(rdev);
3046 data->arg.u.device.specdata2 = MINOR(rdev);
3049 status = nfs4_do_create(dir, dentry, data);
3051 nfs4_free_createdata(data);
3056 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3057 struct iattr *sattr, dev_t rdev)
3059 struct nfs4_exception exception = { };
3062 sattr->ia_mode &= ~current_umask();
3064 err = nfs4_handle_exception(NFS_SERVER(dir),
3065 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3067 } while (exception.retry);
3071 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3072 struct nfs_fsstat *fsstat)
3074 struct nfs4_statfs_arg args = {
3076 .bitmask = server->attr_bitmask,
3078 struct nfs4_statfs_res res = {
3081 struct rpc_message msg = {
3082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3087 nfs_fattr_init(fsstat->fattr);
3088 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3091 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3093 struct nfs4_exception exception = { };
3096 err = nfs4_handle_exception(server,
3097 _nfs4_proc_statfs(server, fhandle, fsstat),
3099 } while (exception.retry);
3103 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3104 struct nfs_fsinfo *fsinfo)
3106 struct nfs4_fsinfo_arg args = {
3108 .bitmask = server->attr_bitmask,
3110 struct nfs4_fsinfo_res res = {
3113 struct rpc_message msg = {
3114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3119 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3122 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3124 struct nfs4_exception exception = { };
3128 err = nfs4_handle_exception(server,
3129 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3131 } while (exception.retry);
3135 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3137 nfs_fattr_init(fsinfo->fattr);
3138 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3141 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3142 struct nfs_pathconf *pathconf)
3144 struct nfs4_pathconf_arg args = {
3146 .bitmask = server->attr_bitmask,
3148 struct nfs4_pathconf_res res = {
3149 .pathconf = pathconf,
3151 struct rpc_message msg = {
3152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3157 /* None of the pathconf attributes are mandatory to implement */
3158 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3159 memset(pathconf, 0, sizeof(*pathconf));
3163 nfs_fattr_init(pathconf->fattr);
3164 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3167 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3168 struct nfs_pathconf *pathconf)
3170 struct nfs4_exception exception = { };
3174 err = nfs4_handle_exception(server,
3175 _nfs4_proc_pathconf(server, fhandle, pathconf),
3177 } while (exception.retry);
3181 void __nfs4_read_done_cb(struct nfs_read_data *data)
3183 nfs_invalidate_atime(data->inode);
3186 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3188 struct nfs_server *server = NFS_SERVER(data->inode);
3190 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3191 nfs_restart_rpc(task, server->nfs_client);
3195 __nfs4_read_done_cb(data);
3196 if (task->tk_status > 0)
3197 renew_lease(server, data->timestamp);
3201 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3204 dprintk("--> %s\n", __func__);
3206 if (!nfs4_sequence_done(task, &data->res.seq_res))
3209 return data->read_done_cb ? data->read_done_cb(task, data) :
3210 nfs4_read_done_cb(task, data);
3213 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3215 data->timestamp = jiffies;
3216 data->read_done_cb = nfs4_read_done_cb;
3217 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3220 /* Reset the the nfs_read_data to send the read to the MDS. */
3221 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3223 dprintk("%s Reset task for i/o through\n", __func__);
3224 put_lseg(data->lseg);
3226 /* offsets will differ in the dense stripe case */
3227 data->args.offset = data->mds_offset;
3228 data->ds_clp = NULL;
3229 data->args.fh = NFS_FH(data->inode);
3230 data->read_done_cb = nfs4_read_done_cb;
3231 task->tk_ops = data->mds_ops;
3232 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3234 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3236 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3238 struct inode *inode = data->inode;
3240 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3241 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3244 if (task->tk_status >= 0) {
3245 renew_lease(NFS_SERVER(inode), data->timestamp);
3246 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3251 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3253 if (!nfs4_sequence_done(task, &data->res.seq_res))
3255 return data->write_done_cb ? data->write_done_cb(task, data) :
3256 nfs4_write_done_cb(task, data);
3259 /* Reset the the nfs_write_data to send the write to the MDS. */
3260 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3262 dprintk("%s Reset task for i/o through\n", __func__);
3263 put_lseg(data->lseg);
3265 data->ds_clp = NULL;
3266 data->write_done_cb = nfs4_write_done_cb;
3267 data->args.fh = NFS_FH(data->inode);
3268 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3269 data->args.offset = data->mds_offset;
3270 data->res.fattr = &data->fattr;
3271 task->tk_ops = data->mds_ops;
3272 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3274 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3276 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3278 struct nfs_server *server = NFS_SERVER(data->inode);
3281 data->args.bitmask = NULL;
3282 data->res.fattr = NULL;
3284 data->args.bitmask = server->cache_consistency_bitmask;
3285 if (!data->write_done_cb)
3286 data->write_done_cb = nfs4_write_done_cb;
3287 data->res.server = server;
3288 data->timestamp = jiffies;
3290 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3293 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3295 struct inode *inode = data->inode;
3297 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3298 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3301 nfs_refresh_inode(inode, data->res.fattr);
3305 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3307 if (!nfs4_sequence_done(task, &data->res.seq_res))
3309 return data->write_done_cb(task, data);
3312 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3314 struct nfs_server *server = NFS_SERVER(data->inode);
3317 data->args.bitmask = NULL;
3318 data->res.fattr = NULL;
3320 data->args.bitmask = server->cache_consistency_bitmask;
3321 if (!data->write_done_cb)
3322 data->write_done_cb = nfs4_commit_done_cb;
3323 data->res.server = server;
3324 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3327 struct nfs4_renewdata {
3328 struct nfs_client *client;
3329 unsigned long timestamp;
3333 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3334 * standalone procedure for queueing an asynchronous RENEW.
3336 static void nfs4_renew_release(void *calldata)
3338 struct nfs4_renewdata *data = calldata;
3339 struct nfs_client *clp = data->client;
3341 if (atomic_read(&clp->cl_count) > 1)
3342 nfs4_schedule_state_renewal(clp);
3343 nfs_put_client(clp);
3347 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3349 struct nfs4_renewdata *data = calldata;
3350 struct nfs_client *clp = data->client;
3351 unsigned long timestamp = data->timestamp;
3353 if (task->tk_status < 0) {
3354 /* Unless we're shutting down, schedule state recovery! */
3355 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3356 nfs4_schedule_lease_recovery(clp);
3359 do_renew_lease(clp, timestamp);
3362 static const struct rpc_call_ops nfs4_renew_ops = {
3363 .rpc_call_done = nfs4_renew_done,
3364 .rpc_release = nfs4_renew_release,
3367 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3369 struct rpc_message msg = {
3370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3374 struct nfs4_renewdata *data;
3376 if (!atomic_inc_not_zero(&clp->cl_count))
3378 data = kmalloc(sizeof(*data), GFP_KERNEL);
3382 data->timestamp = jiffies;
3383 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3384 &nfs4_renew_ops, data);
3387 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3394 unsigned long now = jiffies;
3397 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3400 do_renew_lease(clp, now);
3404 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3406 return (server->caps & NFS_CAP_ACLS)
3407 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3408 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3411 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3412 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3415 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3417 static void buf_to_pages(const void *buf, size_t buflen,
3418 struct page **pages, unsigned int *pgbase)
3420 const void *p = buf;
3422 *pgbase = offset_in_page(buf);
3424 while (p < buf + buflen) {
3425 *(pages++) = virt_to_page(p);
3426 p += PAGE_CACHE_SIZE;
3430 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3431 struct page **pages, unsigned int *pgbase)
3433 struct page *newpage, **spages;
3439 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3440 newpage = alloc_page(GFP_KERNEL);
3442 if (newpage == NULL)
3444 memcpy(page_address(newpage), buf, len);
3449 } while (buflen != 0);
3455 __free_page(spages[rc-1]);
3459 struct nfs4_cached_acl {
3465 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3467 struct nfs_inode *nfsi = NFS_I(inode);
3469 spin_lock(&inode->i_lock);
3470 kfree(nfsi->nfs4_acl);
3471 nfsi->nfs4_acl = acl;
3472 spin_unlock(&inode->i_lock);
3475 static void nfs4_zap_acl_attr(struct inode *inode)
3477 nfs4_set_cached_acl(inode, NULL);
3480 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3482 struct nfs_inode *nfsi = NFS_I(inode);
3483 struct nfs4_cached_acl *acl;
3486 spin_lock(&inode->i_lock);
3487 acl = nfsi->nfs4_acl;
3490 if (buf == NULL) /* user is just asking for length */
3492 if (acl->cached == 0)
3494 ret = -ERANGE; /* see getxattr(2) man page */
3495 if (acl->len > buflen)
3497 memcpy(buf, acl->data, acl->len);
3501 spin_unlock(&inode->i_lock);
3505 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3507 struct nfs4_cached_acl *acl;
3509 if (buf && acl_len <= PAGE_SIZE) {
3510 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3514 memcpy(acl->data, buf, acl_len);
3516 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3523 nfs4_set_cached_acl(inode, acl);
3526 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3528 struct page *pages[NFS4ACL_MAXPAGES];
3529 struct nfs_getaclargs args = {
3530 .fh = NFS_FH(inode),
3534 struct nfs_getaclres res = {
3538 struct rpc_message msg = {
3539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3543 struct page *localpage = NULL;
3546 if (buflen < PAGE_SIZE) {
3547 /* As long as we're doing a round trip to the server anyway,
3548 * let's be prepared for a page of acl data. */
3549 localpage = alloc_page(GFP_KERNEL);
3550 resp_buf = page_address(localpage);
3551 if (localpage == NULL)
3553 args.acl_pages[0] = localpage;
3554 args.acl_pgbase = 0;
3555 args.acl_len = PAGE_SIZE;
3558 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3560 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3563 if (res.acl_len > args.acl_len)
3564 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3566 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3569 if (res.acl_len > buflen)
3572 memcpy(buf, resp_buf, res.acl_len);
3577 __free_page(localpage);
3581 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3583 struct nfs4_exception exception = { };
3586 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3589 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3590 } while (exception.retry);
3594 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3596 struct nfs_server *server = NFS_SERVER(inode);
3599 if (!nfs4_server_supports_acls(server))
3601 ret = nfs_revalidate_inode(server, inode);
3604 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3605 nfs_zap_acl_cache(inode);
3606 ret = nfs4_read_cached_acl(inode, buf, buflen);
3609 return nfs4_get_acl_uncached(inode, buf, buflen);
3612 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3614 struct nfs_server *server = NFS_SERVER(inode);
3615 struct page *pages[NFS4ACL_MAXPAGES];
3616 struct nfs_setaclargs arg = {
3617 .fh = NFS_FH(inode),
3621 struct nfs_setaclres res;
3622 struct rpc_message msg = {
3623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3629 if (!nfs4_server_supports_acls(server))
3631 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3634 nfs_inode_return_delegation(inode);
3635 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3638 * Free each page after tx, so the only ref left is
3639 * held by the network stack
3642 put_page(pages[i-1]);
3645 * Acl update can result in inode attribute update.
3646 * so mark the attribute cache invalid.
3648 spin_lock(&inode->i_lock);
3649 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3650 spin_unlock(&inode->i_lock);
3651 nfs_access_zap_cache(inode);
3652 nfs_zap_acl_cache(inode);
3656 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3658 struct nfs4_exception exception = { };
3661 err = nfs4_handle_exception(NFS_SERVER(inode),
3662 __nfs4_proc_set_acl(inode, buf, buflen),
3664 } while (exception.retry);
3669 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3671 struct nfs_client *clp = server->nfs_client;
3673 if (task->tk_status >= 0)
3675 switch(task->tk_status) {
3676 case -NFS4ERR_ADMIN_REVOKED:
3677 case -NFS4ERR_BAD_STATEID:
3678 case -NFS4ERR_OPENMODE:
3681 nfs4_schedule_stateid_recovery(server, state);
3682 goto wait_on_recovery;
3683 case -NFS4ERR_STALE_STATEID:
3684 case -NFS4ERR_STALE_CLIENTID:
3685 case -NFS4ERR_EXPIRED:
3686 nfs4_schedule_lease_recovery(clp);
3687 goto wait_on_recovery;
3688 #if defined(CONFIG_NFS_V4_1)
3689 case -NFS4ERR_BADSESSION:
3690 case -NFS4ERR_BADSLOT:
3691 case -NFS4ERR_BAD_HIGH_SLOT:
3692 case -NFS4ERR_DEADSESSION:
3693 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3694 case -NFS4ERR_SEQ_FALSE_RETRY:
3695 case -NFS4ERR_SEQ_MISORDERED:
3696 dprintk("%s ERROR %d, Reset session\n", __func__,
3698 nfs4_schedule_session_recovery(clp->cl_session);
3699 task->tk_status = 0;
3701 #endif /* CONFIG_NFS_V4_1 */
3702 case -NFS4ERR_DELAY:
3703 nfs_inc_server_stats(server, NFSIOS_DELAY);
3704 case -NFS4ERR_GRACE:
3706 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3707 task->tk_status = 0;
3709 case -NFS4ERR_RETRY_UNCACHED_REP:
3710 case -NFS4ERR_OLD_STATEID:
3711 task->tk_status = 0;
3714 task->tk_status = nfs4_map_errors(task->tk_status);
3717 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3718 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3719 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3720 task->tk_status = 0;
3724 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3725 unsigned short port, struct rpc_cred *cred,
3726 struct nfs4_setclientid_res *res)
3728 nfs4_verifier sc_verifier;
3729 struct nfs4_setclientid setclientid = {
3730 .sc_verifier = &sc_verifier,
3732 .sc_cb_ident = clp->cl_cb_ident,
3734 struct rpc_message msg = {
3735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3736 .rpc_argp = &setclientid,
3744 p = (__be32*)sc_verifier.data;
3745 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3746 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3749 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3750 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3752 rpc_peeraddr2str(clp->cl_rpcclient,
3754 rpc_peeraddr2str(clp->cl_rpcclient,
3756 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3757 clp->cl_id_uniquifier);
3758 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3759 sizeof(setclientid.sc_netid),
3760 rpc_peeraddr2str(clp->cl_rpcclient,
3761 RPC_DISPLAY_NETID));
3762 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3763 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3764 clp->cl_ipaddr, port >> 8, port & 255);
3766 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3767 if (status != -NFS4ERR_CLID_INUSE)
3770 ++clp->cl_id_uniquifier;
3774 ssleep(clp->cl_lease_time / HZ + 1);
3779 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3780 struct nfs4_setclientid_res *arg,
3781 struct rpc_cred *cred)
3783 struct nfs_fsinfo fsinfo;
3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3787 .rpc_resp = &fsinfo,
3794 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3796 spin_lock(&clp->cl_lock);
3797 clp->cl_lease_time = fsinfo.lease_time * HZ;
3798 clp->cl_last_renewal = now;
3799 spin_unlock(&clp->cl_lock);
3804 struct nfs4_delegreturndata {
3805 struct nfs4_delegreturnargs args;
3806 struct nfs4_delegreturnres res;
3808 nfs4_stateid stateid;
3809 unsigned long timestamp;
3810 struct nfs_fattr fattr;
3814 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3816 struct nfs4_delegreturndata *data = calldata;
3818 if (!nfs4_sequence_done(task, &data->res.seq_res))
3821 switch (task->tk_status) {
3822 case -NFS4ERR_STALE_STATEID:
3823 case -NFS4ERR_EXPIRED:
3825 renew_lease(data->res.server, data->timestamp);
3828 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3830 nfs_restart_rpc(task, data->res.server->nfs_client);
3834 data->rpc_status = task->tk_status;
3837 static void nfs4_delegreturn_release(void *calldata)
3842 #if defined(CONFIG_NFS_V4_1)
3843 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3845 struct nfs4_delegreturndata *d_data;
3847 d_data = (struct nfs4_delegreturndata *)data;
3849 if (nfs4_setup_sequence(d_data->res.server,
3850 &d_data->args.seq_args,
3851 &d_data->res.seq_res, 1, task))
3853 rpc_call_start(task);
3855 #endif /* CONFIG_NFS_V4_1 */
3857 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3858 #if defined(CONFIG_NFS_V4_1)
3859 .rpc_call_prepare = nfs4_delegreturn_prepare,
3860 #endif /* CONFIG_NFS_V4_1 */
3861 .rpc_call_done = nfs4_delegreturn_done,
3862 .rpc_release = nfs4_delegreturn_release,
3865 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3867 struct nfs4_delegreturndata *data;
3868 struct nfs_server *server = NFS_SERVER(inode);
3869 struct rpc_task *task;
3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3874 struct rpc_task_setup task_setup_data = {
3875 .rpc_client = server->client,
3876 .rpc_message = &msg,
3877 .callback_ops = &nfs4_delegreturn_ops,
3878 .flags = RPC_TASK_ASYNC,
3882 data = kzalloc(sizeof(*data), GFP_NOFS);
3885 data->args.fhandle = &data->fh;
3886 data->args.stateid = &data->stateid;
3887 data->args.bitmask = server->attr_bitmask;
3888 nfs_copy_fh(&data->fh, NFS_FH(inode));
3889 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3890 data->res.fattr = &data->fattr;
3891 data->res.server = server;
3892 nfs_fattr_init(data->res.fattr);
3893 data->timestamp = jiffies;
3894 data->rpc_status = 0;
3896 task_setup_data.callback_data = data;
3897 msg.rpc_argp = &data->args;
3898 msg.rpc_resp = &data->res;
3899 task = rpc_run_task(&task_setup_data);
3901 return PTR_ERR(task);
3904 status = nfs4_wait_for_completion_rpc_task(task);
3907 status = data->rpc_status;
3910 nfs_refresh_inode(inode, &data->fattr);
3916 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3918 struct nfs_server *server = NFS_SERVER(inode);
3919 struct nfs4_exception exception = { };
3922 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3924 case -NFS4ERR_STALE_STATEID:
3925 case -NFS4ERR_EXPIRED:
3929 err = nfs4_handle_exception(server, err, &exception);
3930 } while (exception.retry);
3934 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3935 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3938 * sleep, with exponential backoff, and retry the LOCK operation.
3940 static unsigned long
3941 nfs4_set_lock_task_retry(unsigned long timeout)
3943 schedule_timeout_killable(timeout);
3945 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3946 return NFS4_LOCK_MAXTIMEOUT;
3950 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3952 struct inode *inode = state->inode;
3953 struct nfs_server *server = NFS_SERVER(inode);
3954 struct nfs_client *clp = server->nfs_client;
3955 struct nfs_lockt_args arg = {
3956 .fh = NFS_FH(inode),
3959 struct nfs_lockt_res res = {
3962 struct rpc_message msg = {
3963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3966 .rpc_cred = state->owner->so_cred,
3968 struct nfs4_lock_state *lsp;
3971 arg.lock_owner.clientid = clp->cl_clientid;
3972 status = nfs4_set_lock_state(state, request);
3975 lsp = request->fl_u.nfs4_fl.owner;
3976 arg.lock_owner.id = lsp->ls_id.id;
3977 arg.lock_owner.s_dev = server->s_dev;
3978 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3981 request->fl_type = F_UNLCK;
3983 case -NFS4ERR_DENIED:
3986 request->fl_ops->fl_release_private(request);
3991 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3993 struct nfs4_exception exception = { };
3997 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3998 _nfs4_proc_getlk(state, cmd, request),
4000 } while (exception.retry);
4004 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4007 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4009 res = posix_lock_file_wait(file, fl);
4012 res = flock_lock_file_wait(file, fl);
4020 struct nfs4_unlockdata {
4021 struct nfs_locku_args arg;
4022 struct nfs_locku_res res;
4023 struct nfs4_lock_state *lsp;
4024 struct nfs_open_context *ctx;
4025 struct file_lock fl;
4026 const struct nfs_server *server;
4027 unsigned long timestamp;
4030 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4031 struct nfs_open_context *ctx,
4032 struct nfs4_lock_state *lsp,
4033 struct nfs_seqid *seqid)
4035 struct nfs4_unlockdata *p;
4036 struct inode *inode = lsp->ls_state->inode;
4038 p = kzalloc(sizeof(*p), GFP_NOFS);
4041 p->arg.fh = NFS_FH(inode);
4043 p->arg.seqid = seqid;
4044 p->res.seqid = seqid;
4045 p->arg.stateid = &lsp->ls_stateid;
4047 atomic_inc(&lsp->ls_count);
4048 /* Ensure we don't close file until we're done freeing locks! */
4049 p->ctx = get_nfs_open_context(ctx);
4050 memcpy(&p->fl, fl, sizeof(p->fl));
4051 p->server = NFS_SERVER(inode);
4055 static void nfs4_locku_release_calldata(void *data)
4057 struct nfs4_unlockdata *calldata = data;
4058 nfs_free_seqid(calldata->arg.seqid);
4059 nfs4_put_lock_state(calldata->lsp);
4060 put_nfs_open_context(calldata->ctx);
4064 static void nfs4_locku_done(struct rpc_task *task, void *data)
4066 struct nfs4_unlockdata *calldata = data;
4068 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4070 switch (task->tk_status) {
4072 memcpy(calldata->lsp->ls_stateid.data,
4073 calldata->res.stateid.data,
4074 sizeof(calldata->lsp->ls_stateid.data));
4075 renew_lease(calldata->server, calldata->timestamp);
4077 case -NFS4ERR_BAD_STATEID:
4078 case -NFS4ERR_OLD_STATEID:
4079 case -NFS4ERR_STALE_STATEID:
4080 case -NFS4ERR_EXPIRED:
4083 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4084 nfs_restart_rpc(task,
4085 calldata->server->nfs_client);
4089 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4091 struct nfs4_unlockdata *calldata = data;
4093 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4095 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4096 /* Note: exit _without_ running nfs4_locku_done */
4097 task->tk_action = NULL;
4100 calldata->timestamp = jiffies;
4101 if (nfs4_setup_sequence(calldata->server,
4102 &calldata->arg.seq_args,
4103 &calldata->res.seq_res, 1, task))
4105 rpc_call_start(task);
4108 static const struct rpc_call_ops nfs4_locku_ops = {
4109 .rpc_call_prepare = nfs4_locku_prepare,
4110 .rpc_call_done = nfs4_locku_done,
4111 .rpc_release = nfs4_locku_release_calldata,
4114 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4115 struct nfs_open_context *ctx,
4116 struct nfs4_lock_state *lsp,
4117 struct nfs_seqid *seqid)
4119 struct nfs4_unlockdata *data;
4120 struct rpc_message msg = {
4121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4122 .rpc_cred = ctx->cred,
4124 struct rpc_task_setup task_setup_data = {
4125 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4126 .rpc_message = &msg,
4127 .callback_ops = &nfs4_locku_ops,
4128 .workqueue = nfsiod_workqueue,
4129 .flags = RPC_TASK_ASYNC,
4132 /* Ensure this is an unlock - when canceling a lock, the
4133 * canceled lock is passed in, and it won't be an unlock.
4135 fl->fl_type = F_UNLCK;
4137 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4139 nfs_free_seqid(seqid);
4140 return ERR_PTR(-ENOMEM);
4143 msg.rpc_argp = &data->arg;
4144 msg.rpc_resp = &data->res;
4145 task_setup_data.callback_data = data;
4146 return rpc_run_task(&task_setup_data);
4149 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4151 struct nfs_inode *nfsi = NFS_I(state->inode);
4152 struct nfs_seqid *seqid;
4153 struct nfs4_lock_state *lsp;
4154 struct rpc_task *task;
4156 unsigned char fl_flags = request->fl_flags;
4158 status = nfs4_set_lock_state(state, request);
4159 /* Unlock _before_ we do the RPC call */
4160 request->fl_flags |= FL_EXISTS;
4161 down_read(&nfsi->rwsem);
4162 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4163 up_read(&nfsi->rwsem);
4166 up_read(&nfsi->rwsem);
4169 /* Is this a delegated lock? */
4170 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4172 lsp = request->fl_u.nfs4_fl.owner;
4173 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4177 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4178 status = PTR_ERR(task);
4181 status = nfs4_wait_for_completion_rpc_task(task);
4184 request->fl_flags = fl_flags;
4188 struct nfs4_lockdata {
4189 struct nfs_lock_args arg;
4190 struct nfs_lock_res res;
4191 struct nfs4_lock_state *lsp;
4192 struct nfs_open_context *ctx;
4193 struct file_lock fl;
4194 unsigned long timestamp;
4197 struct nfs_server *server;
4200 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4201 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4204 struct nfs4_lockdata *p;
4205 struct inode *inode = lsp->ls_state->inode;
4206 struct nfs_server *server = NFS_SERVER(inode);
4208 p = kzalloc(sizeof(*p), gfp_mask);
4212 p->arg.fh = NFS_FH(inode);
4214 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4215 if (p->arg.open_seqid == NULL)
4217 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4218 if (p->arg.lock_seqid == NULL)
4219 goto out_free_seqid;
4220 p->arg.lock_stateid = &lsp->ls_stateid;
4221 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4222 p->arg.lock_owner.id = lsp->ls_id.id;
4223 p->arg.lock_owner.s_dev = server->s_dev;
4224 p->res.lock_seqid = p->arg.lock_seqid;
4227 atomic_inc(&lsp->ls_count);
4228 p->ctx = get_nfs_open_context(ctx);
4229 memcpy(&p->fl, fl, sizeof(p->fl));
4232 nfs_free_seqid(p->arg.open_seqid);
4238 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4240 struct nfs4_lockdata *data = calldata;
4241 struct nfs4_state *state = data->lsp->ls_state;
4243 dprintk("%s: begin!\n", __func__);
4244 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4246 /* Do we need to do an open_to_lock_owner? */
4247 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4248 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4250 data->arg.open_stateid = &state->stateid;
4251 data->arg.new_lock_owner = 1;
4252 data->res.open_seqid = data->arg.open_seqid;
4254 data->arg.new_lock_owner = 0;
4255 data->timestamp = jiffies;
4256 if (nfs4_setup_sequence(data->server,
4257 &data->arg.seq_args,
4258 &data->res.seq_res, 1, task))
4260 rpc_call_start(task);
4261 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4264 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4266 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4267 nfs4_lock_prepare(task, calldata);
4270 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4272 struct nfs4_lockdata *data = calldata;
4274 dprintk("%s: begin!\n", __func__);
4276 if (!nfs4_sequence_done(task, &data->res.seq_res))
4279 data->rpc_status = task->tk_status;
4280 if (data->arg.new_lock_owner != 0) {
4281 if (data->rpc_status == 0)
4282 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4286 if (data->rpc_status == 0) {
4287 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4288 sizeof(data->lsp->ls_stateid.data));
4289 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4290 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4293 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4296 static void nfs4_lock_release(void *calldata)
4298 struct nfs4_lockdata *data = calldata;
4300 dprintk("%s: begin!\n", __func__);
4301 nfs_free_seqid(data->arg.open_seqid);
4302 if (data->cancelled != 0) {
4303 struct rpc_task *task;
4304 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4305 data->arg.lock_seqid);
4307 rpc_put_task_async(task);
4308 dprintk("%s: cancelling lock!\n", __func__);
4310 nfs_free_seqid(data->arg.lock_seqid);
4311 nfs4_put_lock_state(data->lsp);
4312 put_nfs_open_context(data->ctx);
4314 dprintk("%s: done!\n", __func__);
4317 static const struct rpc_call_ops nfs4_lock_ops = {
4318 .rpc_call_prepare = nfs4_lock_prepare,
4319 .rpc_call_done = nfs4_lock_done,
4320 .rpc_release = nfs4_lock_release,
4323 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4324 .rpc_call_prepare = nfs4_recover_lock_prepare,
4325 .rpc_call_done = nfs4_lock_done,
4326 .rpc_release = nfs4_lock_release,
4329 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4332 case -NFS4ERR_ADMIN_REVOKED:
4333 case -NFS4ERR_BAD_STATEID:
4334 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4335 if (new_lock_owner != 0 ||
4336 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4337 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4339 case -NFS4ERR_STALE_STATEID:
4340 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4341 case -NFS4ERR_EXPIRED:
4342 nfs4_schedule_lease_recovery(server->nfs_client);
4346 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4348 struct nfs4_lockdata *data;
4349 struct rpc_task *task;
4350 struct rpc_message msg = {
4351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4352 .rpc_cred = state->owner->so_cred,
4354 struct rpc_task_setup task_setup_data = {
4355 .rpc_client = NFS_CLIENT(state->inode),
4356 .rpc_message = &msg,
4357 .callback_ops = &nfs4_lock_ops,
4358 .workqueue = nfsiod_workqueue,
4359 .flags = RPC_TASK_ASYNC,
4363 dprintk("%s: begin!\n", __func__);
4364 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4365 fl->fl_u.nfs4_fl.owner,
4366 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4370 data->arg.block = 1;
4371 if (recovery_type > NFS_LOCK_NEW) {
4372 if (recovery_type == NFS_LOCK_RECLAIM)
4373 data->arg.reclaim = NFS_LOCK_RECLAIM;
4374 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4376 msg.rpc_argp = &data->arg;
4377 msg.rpc_resp = &data->res;
4378 task_setup_data.callback_data = data;
4379 task = rpc_run_task(&task_setup_data);
4381 return PTR_ERR(task);
4382 ret = nfs4_wait_for_completion_rpc_task(task);
4384 ret = data->rpc_status;
4386 nfs4_handle_setlk_error(data->server, data->lsp,
4387 data->arg.new_lock_owner, ret);
4389 data->cancelled = 1;
4391 dprintk("%s: done, ret = %d!\n", __func__, ret);
4395 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4397 struct nfs_server *server = NFS_SERVER(state->inode);
4398 struct nfs4_exception exception = { };
4402 /* Cache the lock if possible... */
4403 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4405 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4406 if (err != -NFS4ERR_DELAY)
4408 nfs4_handle_exception(server, err, &exception);
4409 } while (exception.retry);
4413 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4415 struct nfs_server *server = NFS_SERVER(state->inode);
4416 struct nfs4_exception exception = { };
4419 err = nfs4_set_lock_state(state, request);
4423 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4425 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4429 case -NFS4ERR_GRACE:
4430 case -NFS4ERR_DELAY:
4431 nfs4_handle_exception(server, err, &exception);
4434 } while (exception.retry);
4439 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4441 struct nfs_inode *nfsi = NFS_I(state->inode);
4442 unsigned char fl_flags = request->fl_flags;
4443 int status = -ENOLCK;
4445 if ((fl_flags & FL_POSIX) &&
4446 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4448 /* Is this a delegated open? */
4449 status = nfs4_set_lock_state(state, request);
4452 request->fl_flags |= FL_ACCESS;
4453 status = do_vfs_lock(request->fl_file, request);
4456 down_read(&nfsi->rwsem);
4457 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4458 /* Yes: cache locks! */
4459 /* ...but avoid races with delegation recall... */
4460 request->fl_flags = fl_flags & ~FL_SLEEP;
4461 status = do_vfs_lock(request->fl_file, request);
4464 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4467 /* Note: we always want to sleep here! */
4468 request->fl_flags = fl_flags | FL_SLEEP;
4469 if (do_vfs_lock(request->fl_file, request) < 0)
4470 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4472 up_read(&nfsi->rwsem);
4474 request->fl_flags = fl_flags;
4478 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4480 struct nfs4_exception exception = { };
4484 err = _nfs4_proc_setlk(state, cmd, request);
4485 if (err == -NFS4ERR_DENIED)
4487 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4489 } while (exception.retry);
4494 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4496 struct nfs_open_context *ctx;
4497 struct nfs4_state *state;
4498 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4501 /* verify open state */
4502 ctx = nfs_file_open_context(filp);
4505 if (request->fl_start < 0 || request->fl_end < 0)
4508 if (IS_GETLK(cmd)) {
4510 return nfs4_proc_getlk(state, F_GETLK, request);
4514 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4517 if (request->fl_type == F_UNLCK) {
4519 return nfs4_proc_unlck(state, cmd, request);
4526 status = nfs4_proc_setlk(state, cmd, request);
4527 if ((status != -EAGAIN) || IS_SETLK(cmd))
4529 timeout = nfs4_set_lock_task_retry(timeout);
4530 status = -ERESTARTSYS;
4533 } while(status < 0);
4537 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4539 struct nfs_server *server = NFS_SERVER(state->inode);
4540 struct nfs4_exception exception = { };
4543 err = nfs4_set_lock_state(state, fl);
4547 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4550 printk(KERN_ERR "%s: unhandled error %d.\n",
4555 case -NFS4ERR_EXPIRED:
4556 case -NFS4ERR_STALE_CLIENTID:
4557 case -NFS4ERR_STALE_STATEID:
4558 nfs4_schedule_lease_recovery(server->nfs_client);
4560 case -NFS4ERR_BADSESSION:
4561 case -NFS4ERR_BADSLOT:
4562 case -NFS4ERR_BAD_HIGH_SLOT:
4563 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4564 case -NFS4ERR_DEADSESSION:
4565 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4569 * The show must go on: exit, but mark the
4570 * stateid as needing recovery.
4572 case -NFS4ERR_ADMIN_REVOKED:
4573 case -NFS4ERR_BAD_STATEID:
4574 case -NFS4ERR_OPENMODE:
4575 nfs4_schedule_stateid_recovery(server, state);
4580 * User RPCSEC_GSS context has expired.
4581 * We cannot recover this stateid now, so
4582 * skip it and allow recovery thread to
4588 case -NFS4ERR_DENIED:
4589 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4592 case -NFS4ERR_DELAY:
4595 err = nfs4_handle_exception(server, err, &exception);
4596 } while (exception.retry);
4601 static void nfs4_release_lockowner_release(void *calldata)
4606 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4607 .rpc_release = nfs4_release_lockowner_release,
4610 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4612 struct nfs_server *server = lsp->ls_state->owner->so_server;
4613 struct nfs_release_lockowner_args *args;
4614 struct rpc_message msg = {
4615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4618 if (server->nfs_client->cl_mvops->minor_version != 0)
4620 args = kmalloc(sizeof(*args), GFP_NOFS);
4623 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4624 args->lock_owner.id = lsp->ls_id.id;
4625 args->lock_owner.s_dev = server->s_dev;
4626 msg.rpc_argp = args;
4627 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4630 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4632 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4633 const void *buf, size_t buflen,
4634 int flags, int type)
4636 if (strcmp(key, "") != 0)
4639 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4642 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4643 void *buf, size_t buflen, int type)
4645 if (strcmp(key, "") != 0)
4648 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4651 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4652 size_t list_len, const char *name,
4653 size_t name_len, int type)
4655 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4657 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4660 if (list && len <= list_len)
4661 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4665 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4667 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4668 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4669 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4672 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4673 NFS_ATTR_FATTR_NLINK;
4674 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4678 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4679 struct nfs4_fs_locations *fs_locations, struct page *page)
4681 struct nfs_server *server = NFS_SERVER(dir);
4683 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4684 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4686 struct nfs4_fs_locations_arg args = {
4687 .dir_fh = NFS_FH(dir),
4692 struct nfs4_fs_locations_res res = {
4693 .fs_locations = fs_locations,
4695 struct rpc_message msg = {
4696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4702 dprintk("%s: start\n", __func__);
4703 nfs_fattr_init(&fs_locations->fattr);
4704 fs_locations->server = server;
4705 fs_locations->nlocations = 0;
4706 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4707 nfs_fixup_referral_attributes(&fs_locations->fattr);
4708 dprintk("%s: returned status = %d\n", __func__, status);
4712 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4715 struct nfs4_secinfo_arg args = {
4716 .dir_fh = NFS_FH(dir),
4719 struct nfs4_secinfo_res res = {
4722 struct rpc_message msg = {
4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4728 dprintk("NFS call secinfo %s\n", name->name);
4729 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4730 dprintk("NFS reply secinfo: %d\n", status);
4734 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4736 struct nfs4_exception exception = { };
4739 err = nfs4_handle_exception(NFS_SERVER(dir),
4740 _nfs4_proc_secinfo(dir, name, flavors),
4742 } while (exception.retry);
4746 #ifdef CONFIG_NFS_V4_1
4748 * Check the exchange flags returned by the server for invalid flags, having
4749 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4752 static int nfs4_check_cl_exchange_flags(u32 flags)
4754 if (flags & ~EXCHGID4_FLAG_MASK_R)
4756 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4757 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4759 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4763 return -NFS4ERR_INVAL;
4767 * nfs4_proc_exchange_id()
4769 * Since the clientid has expired, all compounds using sessions
4770 * associated with the stale clientid will be returning
4771 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4772 * be in some phase of session reset.
4774 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4776 nfs4_verifier verifier;
4777 struct nfs41_exchange_id_args args = {
4779 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4781 struct nfs41_exchange_id_res res = {
4785 struct rpc_message msg = {
4786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4793 dprintk("--> %s\n", __func__);
4794 BUG_ON(clp == NULL);
4796 p = (u32 *)verifier.data;
4797 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4798 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4799 args.verifier = &verifier;
4801 args.id_len = scnprintf(args.id, sizeof(args.id),
4804 init_utsname()->nodename,
4805 init_utsname()->domainname,
4806 clp->cl_rpcclient->cl_auth->au_flavor);
4808 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4810 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4811 dprintk("<-- %s status= %d\n", __func__, status);
4815 struct nfs4_get_lease_time_data {
4816 struct nfs4_get_lease_time_args *args;
4817 struct nfs4_get_lease_time_res *res;
4818 struct nfs_client *clp;
4821 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4825 struct nfs4_get_lease_time_data *data =
4826 (struct nfs4_get_lease_time_data *)calldata;
4828 dprintk("--> %s\n", __func__);
4829 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4830 /* just setup sequence, do not trigger session recovery
4831 since we're invoked within one */
4832 ret = nfs41_setup_sequence(data->clp->cl_session,
4833 &data->args->la_seq_args,
4834 &data->res->lr_seq_res, 0, task);
4836 BUG_ON(ret == -EAGAIN);
4837 rpc_call_start(task);
4838 dprintk("<-- %s\n", __func__);
4842 * Called from nfs4_state_manager thread for session setup, so don't recover
4843 * from sequence operation or clientid errors.
4845 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4847 struct nfs4_get_lease_time_data *data =
4848 (struct nfs4_get_lease_time_data *)calldata;
4850 dprintk("--> %s\n", __func__);
4851 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4853 switch (task->tk_status) {
4854 case -NFS4ERR_DELAY:
4855 case -NFS4ERR_GRACE:
4856 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4857 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4858 task->tk_status = 0;
4860 case -NFS4ERR_RETRY_UNCACHED_REP:
4861 nfs_restart_rpc(task, data->clp);
4864 dprintk("<-- %s\n", __func__);
4867 struct rpc_call_ops nfs4_get_lease_time_ops = {
4868 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4869 .rpc_call_done = nfs4_get_lease_time_done,
4872 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4874 struct rpc_task *task;
4875 struct nfs4_get_lease_time_args args;
4876 struct nfs4_get_lease_time_res res = {
4877 .lr_fsinfo = fsinfo,
4879 struct nfs4_get_lease_time_data data = {
4884 struct rpc_message msg = {
4885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4889 struct rpc_task_setup task_setup = {
4890 .rpc_client = clp->cl_rpcclient,
4891 .rpc_message = &msg,
4892 .callback_ops = &nfs4_get_lease_time_ops,
4893 .callback_data = &data,
4894 .flags = RPC_TASK_TIMEOUT,
4898 dprintk("--> %s\n", __func__);
4899 task = rpc_run_task(&task_setup);
4902 status = PTR_ERR(task);
4904 status = task->tk_status;
4907 dprintk("<-- %s return %d\n", __func__, status);
4913 * Reset a slot table
4915 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4918 struct nfs4_slot *new = NULL;
4922 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4923 max_reqs, tbl->max_slots);
4925 /* Does the newly negotiated max_reqs match the existing slot table? */
4926 if (max_reqs != tbl->max_slots) {
4928 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4935 spin_lock(&tbl->slot_tbl_lock);
4938 tbl->max_slots = max_reqs;
4940 for (i = 0; i < tbl->max_slots; ++i)
4941 tbl->slots[i].seq_nr = ivalue;
4942 spin_unlock(&tbl->slot_tbl_lock);
4943 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4944 tbl, tbl->slots, tbl->max_slots);
4946 dprintk("<-- %s: return %d\n", __func__, ret);
4951 * Reset the forechannel and backchannel slot tables
4953 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4957 status = nfs4_reset_slot_table(&session->fc_slot_table,
4958 session->fc_attrs.max_reqs, 1);
4962 status = nfs4_reset_slot_table(&session->bc_slot_table,
4963 session->bc_attrs.max_reqs, 0);
4967 /* Destroy the slot table */
4968 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4970 if (session->fc_slot_table.slots != NULL) {
4971 kfree(session->fc_slot_table.slots);
4972 session->fc_slot_table.slots = NULL;
4974 if (session->bc_slot_table.slots != NULL) {
4975 kfree(session->bc_slot_table.slots);
4976 session->bc_slot_table.slots = NULL;
4982 * Initialize slot table
4984 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4985 int max_slots, int ivalue)
4987 struct nfs4_slot *slot;
4990 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4992 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4994 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4999 spin_lock(&tbl->slot_tbl_lock);
5000 tbl->max_slots = max_slots;
5002 tbl->highest_used_slotid = -1; /* no slot is currently used */
5003 spin_unlock(&tbl->slot_tbl_lock);
5004 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5005 tbl, tbl->slots, tbl->max_slots);
5007 dprintk("<-- %s: return %d\n", __func__, ret);
5012 * Initialize the forechannel and backchannel tables
5014 static int nfs4_init_slot_tables(struct nfs4_session *session)
5016 struct nfs4_slot_table *tbl;
5019 tbl = &session->fc_slot_table;
5020 if (tbl->slots == NULL) {
5021 status = nfs4_init_slot_table(tbl,
5022 session->fc_attrs.max_reqs, 1);
5027 tbl = &session->bc_slot_table;
5028 if (tbl->slots == NULL) {
5029 status = nfs4_init_slot_table(tbl,
5030 session->bc_attrs.max_reqs, 0);
5032 nfs4_destroy_slot_tables(session);
5038 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5040 struct nfs4_session *session;
5041 struct nfs4_slot_table *tbl;
5043 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5047 tbl = &session->fc_slot_table;
5048 tbl->highest_used_slotid = -1;
5049 spin_lock_init(&tbl->slot_tbl_lock);
5050 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5051 init_completion(&tbl->complete);
5053 tbl = &session->bc_slot_table;
5054 tbl->highest_used_slotid = -1;
5055 spin_lock_init(&tbl->slot_tbl_lock);
5056 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5057 init_completion(&tbl->complete);
5059 session->session_state = 1<<NFS4_SESSION_INITING;
5065 void nfs4_destroy_session(struct nfs4_session *session)
5067 nfs4_proc_destroy_session(session);
5068 dprintk("%s Destroy backchannel for xprt %p\n",
5069 __func__, session->clp->cl_rpcclient->cl_xprt);
5070 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5071 NFS41_BC_MIN_CALLBACKS);
5072 nfs4_destroy_slot_tables(session);
5077 * Initialize the values to be used by the client in CREATE_SESSION
5078 * If nfs4_init_session set the fore channel request and response sizes,
5081 * Set the back channel max_resp_sz_cached to zero to force the client to
5082 * always set csa_cachethis to FALSE because the current implementation
5083 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5085 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5087 struct nfs4_session *session = args->client->cl_session;
5088 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5089 mxresp_sz = session->fc_attrs.max_resp_sz;
5092 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5094 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5095 /* Fore channel attributes */
5096 args->fc_attrs.headerpadsz = 0;
5097 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5098 args->fc_attrs.max_resp_sz = mxresp_sz;
5099 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5100 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5102 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5103 "max_ops=%u max_reqs=%u\n",
5105 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5106 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5108 /* Back channel attributes */
5109 args->bc_attrs.headerpadsz = 0;
5110 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5111 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5112 args->bc_attrs.max_resp_sz_cached = 0;
5113 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5114 args->bc_attrs.max_reqs = 1;
5116 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5117 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5119 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5120 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5121 args->bc_attrs.max_reqs);
5124 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5126 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5127 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5129 if (rcvd->headerpadsz > sent->headerpadsz)
5131 if (rcvd->max_resp_sz > sent->max_resp_sz)
5134 * Our requested max_ops is the minimum we need; we're not
5135 * prepared to break up compounds into smaller pieces than that.
5136 * So, no point even trying to continue if the server won't
5139 if (rcvd->max_ops < sent->max_ops)
5141 if (rcvd->max_reqs == 0)
5146 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5148 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5149 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5151 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5153 if (rcvd->max_resp_sz < sent->max_resp_sz)
5155 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5157 /* These would render the backchannel useless: */
5158 if (rcvd->max_ops == 0)
5160 if (rcvd->max_reqs == 0)
5165 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5166 struct nfs4_session *session)
5170 ret = nfs4_verify_fore_channel_attrs(args, session);
5173 return nfs4_verify_back_channel_attrs(args, session);
5176 static int _nfs4_proc_create_session(struct nfs_client *clp)
5178 struct nfs4_session *session = clp->cl_session;
5179 struct nfs41_create_session_args args = {
5181 .cb_program = NFS4_CALLBACK,
5183 struct nfs41_create_session_res res = {
5186 struct rpc_message msg = {
5187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5193 nfs4_init_channel_attrs(&args);
5194 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5196 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5199 /* Verify the session's negotiated channel_attrs values */
5200 status = nfs4_verify_channel_attrs(&args, session);
5202 /* Increment the clientid slot sequence id */
5210 * Issues a CREATE_SESSION operation to the server.
5211 * It is the responsibility of the caller to verify the session is
5212 * expired before calling this routine.
5214 int nfs4_proc_create_session(struct nfs_client *clp)
5218 struct nfs4_session *session = clp->cl_session;
5220 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5222 status = _nfs4_proc_create_session(clp);
5226 /* Init and reset the fore channel */
5227 status = nfs4_init_slot_tables(session);
5228 dprintk("slot table initialization returned %d\n", status);
5231 status = nfs4_reset_slot_tables(session);
5232 dprintk("slot table reset returned %d\n", status);
5236 ptr = (unsigned *)&session->sess_id.data[0];
5237 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5238 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5240 dprintk("<-- %s\n", __func__);
5245 * Issue the over-the-wire RPC DESTROY_SESSION.
5246 * The caller must serialize access to this routine.
5248 int nfs4_proc_destroy_session(struct nfs4_session *session)
5251 struct rpc_message msg;
5253 dprintk("--> nfs4_proc_destroy_session\n");
5255 /* session is still being setup */
5256 if (session->clp->cl_cons_state != NFS_CS_READY)
5259 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5260 msg.rpc_argp = session;
5261 msg.rpc_resp = NULL;
5262 msg.rpc_cred = NULL;
5263 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5267 "Got error %d from the server on DESTROY_SESSION. "
5268 "Session has been destroyed regardless...\n", status);
5270 dprintk("<-- nfs4_proc_destroy_session\n");
5274 int nfs4_init_session(struct nfs_server *server)
5276 struct nfs_client *clp = server->nfs_client;
5277 struct nfs4_session *session;
5278 unsigned int rsize, wsize;
5281 if (!nfs4_has_session(clp))
5284 session = clp->cl_session;
5285 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5288 rsize = server->rsize;
5290 rsize = NFS_MAX_FILE_IO_SIZE;
5291 wsize = server->wsize;
5293 wsize = NFS_MAX_FILE_IO_SIZE;
5295 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5296 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5298 ret = nfs4_recover_expired_lease(server);
5300 ret = nfs4_check_client_ready(clp);
5304 int nfs4_init_ds_session(struct nfs_client *clp)
5306 struct nfs4_session *session = clp->cl_session;
5309 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5312 ret = nfs4_client_recover_expired_lease(clp);
5314 /* Test for the DS role */
5315 if (!is_ds_client(clp))
5318 ret = nfs4_check_client_ready(clp);
5322 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5326 * Renew the cl_session lease.
5328 struct nfs4_sequence_data {
5329 struct nfs_client *clp;
5330 struct nfs4_sequence_args args;
5331 struct nfs4_sequence_res res;
5334 static void nfs41_sequence_release(void *data)
5336 struct nfs4_sequence_data *calldata = data;
5337 struct nfs_client *clp = calldata->clp;
5339 if (atomic_read(&clp->cl_count) > 1)
5340 nfs4_schedule_state_renewal(clp);
5341 nfs_put_client(clp);
5345 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5347 switch(task->tk_status) {
5348 case -NFS4ERR_DELAY:
5349 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5352 nfs4_schedule_lease_recovery(clp);
5357 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5359 struct nfs4_sequence_data *calldata = data;
5360 struct nfs_client *clp = calldata->clp;
5362 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5365 if (task->tk_status < 0) {
5366 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5367 if (atomic_read(&clp->cl_count) == 1)
5370 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5371 rpc_restart_call_prepare(task);
5375 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5377 dprintk("<-- %s\n", __func__);
5380 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5382 struct nfs4_sequence_data *calldata = data;
5383 struct nfs_client *clp = calldata->clp;
5384 struct nfs4_sequence_args *args;
5385 struct nfs4_sequence_res *res;
5387 args = task->tk_msg.rpc_argp;
5388 res = task->tk_msg.rpc_resp;
5390 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5392 rpc_call_start(task);
5395 static const struct rpc_call_ops nfs41_sequence_ops = {
5396 .rpc_call_done = nfs41_sequence_call_done,
5397 .rpc_call_prepare = nfs41_sequence_prepare,
5398 .rpc_release = nfs41_sequence_release,
5401 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5403 struct nfs4_sequence_data *calldata;
5404 struct rpc_message msg = {
5405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5408 struct rpc_task_setup task_setup_data = {
5409 .rpc_client = clp->cl_rpcclient,
5410 .rpc_message = &msg,
5411 .callback_ops = &nfs41_sequence_ops,
5412 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5415 if (!atomic_inc_not_zero(&clp->cl_count))
5416 return ERR_PTR(-EIO);
5417 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5418 if (calldata == NULL) {
5419 nfs_put_client(clp);
5420 return ERR_PTR(-ENOMEM);
5422 msg.rpc_argp = &calldata->args;
5423 msg.rpc_resp = &calldata->res;
5424 calldata->clp = clp;
5425 task_setup_data.callback_data = calldata;
5427 return rpc_run_task(&task_setup_data);
5430 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5432 struct rpc_task *task;
5435 task = _nfs41_proc_sequence(clp, cred);
5437 ret = PTR_ERR(task);
5439 rpc_put_task_async(task);
5440 dprintk("<-- %s status=%d\n", __func__, ret);
5444 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5446 struct rpc_task *task;
5449 task = _nfs41_proc_sequence(clp, cred);
5451 ret = PTR_ERR(task);
5454 ret = rpc_wait_for_completion_task(task);
5456 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5458 if (task->tk_status == 0)
5459 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5460 ret = task->tk_status;
5464 dprintk("<-- %s status=%d\n", __func__, ret);
5468 struct nfs4_reclaim_complete_data {
5469 struct nfs_client *clp;
5470 struct nfs41_reclaim_complete_args arg;
5471 struct nfs41_reclaim_complete_res res;
5474 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5476 struct nfs4_reclaim_complete_data *calldata = data;
5478 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5479 if (nfs41_setup_sequence(calldata->clp->cl_session,
5480 &calldata->arg.seq_args,
5481 &calldata->res.seq_res, 0, task))
5484 rpc_call_start(task);
5487 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5489 switch(task->tk_status) {
5491 case -NFS4ERR_COMPLETE_ALREADY:
5492 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5494 case -NFS4ERR_DELAY:
5495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5497 case -NFS4ERR_RETRY_UNCACHED_REP:
5500 nfs4_schedule_lease_recovery(clp);
5505 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5507 struct nfs4_reclaim_complete_data *calldata = data;
5508 struct nfs_client *clp = calldata->clp;
5509 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5511 dprintk("--> %s\n", __func__);
5512 if (!nfs41_sequence_done(task, res))
5515 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5516 rpc_restart_call_prepare(task);
5519 dprintk("<-- %s\n", __func__);
5522 static void nfs4_free_reclaim_complete_data(void *data)
5524 struct nfs4_reclaim_complete_data *calldata = data;
5529 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5530 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5531 .rpc_call_done = nfs4_reclaim_complete_done,
5532 .rpc_release = nfs4_free_reclaim_complete_data,
5536 * Issue a global reclaim complete.
5538 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5540 struct nfs4_reclaim_complete_data *calldata;
5541 struct rpc_task *task;
5542 struct rpc_message msg = {
5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5545 struct rpc_task_setup task_setup_data = {
5546 .rpc_client = clp->cl_rpcclient,
5547 .rpc_message = &msg,
5548 .callback_ops = &nfs4_reclaim_complete_call_ops,
5549 .flags = RPC_TASK_ASYNC,
5551 int status = -ENOMEM;
5553 dprintk("--> %s\n", __func__);
5554 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5555 if (calldata == NULL)
5557 calldata->clp = clp;
5558 calldata->arg.one_fs = 0;
5560 msg.rpc_argp = &calldata->arg;
5561 msg.rpc_resp = &calldata->res;
5562 task_setup_data.callback_data = calldata;
5563 task = rpc_run_task(&task_setup_data);
5565 status = PTR_ERR(task);
5568 status = nfs4_wait_for_completion_rpc_task(task);
5570 status = task->tk_status;
5574 dprintk("<-- %s status=%d\n", __func__, status);
5579 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5581 struct nfs4_layoutget *lgp = calldata;
5582 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5584 dprintk("--> %s\n", __func__);
5585 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5586 * right now covering the LAYOUTGET we are about to send.
5587 * However, that is not so catastrophic, and there seems
5588 * to be no way to prevent it completely.
5590 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5591 &lgp->res.seq_res, 0, task))
5593 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5594 NFS_I(lgp->args.inode)->layout,
5595 lgp->args.ctx->state)) {
5596 rpc_exit(task, NFS4_OK);
5599 rpc_call_start(task);
5602 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5604 struct nfs4_layoutget *lgp = calldata;
5605 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5607 dprintk("--> %s\n", __func__);
5609 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5612 switch (task->tk_status) {
5615 case -NFS4ERR_LAYOUTTRYLATER:
5616 case -NFS4ERR_RECALLCONFLICT:
5617 task->tk_status = -NFS4ERR_DELAY;
5620 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5621 rpc_restart_call_prepare(task);
5625 dprintk("<-- %s\n", __func__);
5628 static void nfs4_layoutget_release(void *calldata)
5630 struct nfs4_layoutget *lgp = calldata;
5632 dprintk("--> %s\n", __func__);
5633 put_nfs_open_context(lgp->args.ctx);
5635 dprintk("<-- %s\n", __func__);
5638 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5639 .rpc_call_prepare = nfs4_layoutget_prepare,
5640 .rpc_call_done = nfs4_layoutget_done,
5641 .rpc_release = nfs4_layoutget_release,
5644 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5646 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5647 struct rpc_task *task;
5648 struct rpc_message msg = {
5649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5650 .rpc_argp = &lgp->args,
5651 .rpc_resp = &lgp->res,
5653 struct rpc_task_setup task_setup_data = {
5654 .rpc_client = server->client,
5655 .rpc_message = &msg,
5656 .callback_ops = &nfs4_layoutget_call_ops,
5657 .callback_data = lgp,
5658 .flags = RPC_TASK_ASYNC,
5662 dprintk("--> %s\n", __func__);
5664 lgp->res.layoutp = &lgp->args.layout;
5665 lgp->res.seq_res.sr_slot = NULL;
5666 task = rpc_run_task(&task_setup_data);
5668 return PTR_ERR(task);
5669 status = nfs4_wait_for_completion_rpc_task(task);
5671 status = task->tk_status;
5673 status = pnfs_layout_process(lgp);
5675 dprintk("<-- %s status=%d\n", __func__, status);
5680 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5682 struct nfs4_layoutreturn *lrp = calldata;
5684 dprintk("--> %s\n", __func__);
5685 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5686 &lrp->res.seq_res, 0, task))
5688 rpc_call_start(task);
5691 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5693 struct nfs4_layoutreturn *lrp = calldata;
5694 struct nfs_server *server;
5696 dprintk("--> %s\n", __func__);
5698 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5701 server = NFS_SERVER(lrp->args.inode);
5702 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5703 nfs_restart_rpc(task, lrp->clp);
5706 if (task->tk_status == 0) {
5707 struct pnfs_layout_hdr *lo = NFS_I(lrp->args.inode)->layout;
5709 if (lrp->res.lrs_present) {
5710 spin_lock(&lo->plh_inode->i_lock);
5711 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5712 spin_unlock(&lo->plh_inode->i_lock);
5714 BUG_ON(!list_empty(&lo->plh_segs));
5716 dprintk("<-- %s\n", __func__);
5719 static void nfs4_layoutreturn_release(void *calldata)
5721 struct nfs4_layoutreturn *lrp = calldata;
5723 dprintk("--> %s\n", __func__);
5724 put_layout_hdr(NFS_I(lrp->args.inode)->layout);
5726 dprintk("<-- %s\n", __func__);
5729 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5730 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5731 .rpc_call_done = nfs4_layoutreturn_done,
5732 .rpc_release = nfs4_layoutreturn_release,
5735 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5737 struct rpc_task *task;
5738 struct rpc_message msg = {
5739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5740 .rpc_argp = &lrp->args,
5741 .rpc_resp = &lrp->res,
5743 struct rpc_task_setup task_setup_data = {
5744 .rpc_client = lrp->clp->cl_rpcclient,
5745 .rpc_message = &msg,
5746 .callback_ops = &nfs4_layoutreturn_call_ops,
5747 .callback_data = lrp,
5751 dprintk("--> %s\n", __func__);
5752 task = rpc_run_task(&task_setup_data);
5754 return PTR_ERR(task);
5755 status = task->tk_status;
5756 dprintk("<-- %s status=%d\n", __func__, status);
5762 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5764 struct nfs4_getdeviceinfo_args args = {
5767 struct nfs4_getdeviceinfo_res res = {
5770 struct rpc_message msg = {
5771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5777 dprintk("--> %s\n", __func__);
5778 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5779 dprintk("<-- %s status=%d\n", __func__, status);
5784 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5786 struct nfs4_exception exception = { };
5790 err = nfs4_handle_exception(server,
5791 _nfs4_proc_getdeviceinfo(server, pdev),
5793 } while (exception.retry);
5796 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5798 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5800 struct nfs4_layoutcommit_data *data = calldata;
5801 struct nfs_server *server = NFS_SERVER(data->args.inode);
5803 if (nfs4_setup_sequence(server, &data->args.seq_args,
5804 &data->res.seq_res, 1, task))
5806 rpc_call_start(task);
5810 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5812 struct nfs4_layoutcommit_data *data = calldata;
5813 struct nfs_server *server = NFS_SERVER(data->args.inode);
5815 if (!nfs4_sequence_done(task, &data->res.seq_res))
5818 switch (task->tk_status) { /* Just ignore these failures */
5819 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5820 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5821 case NFS4ERR_BADLAYOUT: /* no layout */
5822 case NFS4ERR_GRACE: /* loca_recalim always false */
5823 task->tk_status = 0;
5826 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5827 nfs_restart_rpc(task, server->nfs_client);
5831 if (task->tk_status == 0)
5832 nfs_post_op_update_inode_force_wcc(data->args.inode,
5836 static void nfs4_layoutcommit_release(void *calldata)
5838 struct nfs4_layoutcommit_data *data = calldata;
5840 /* Matched by references in pnfs_set_layoutcommit */
5841 put_lseg(data->lseg);
5842 put_rpccred(data->cred);
5846 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5847 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5848 .rpc_call_done = nfs4_layoutcommit_done,
5849 .rpc_release = nfs4_layoutcommit_release,
5853 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
5855 struct rpc_message msg = {
5856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5857 .rpc_argp = &data->args,
5858 .rpc_resp = &data->res,
5859 .rpc_cred = data->cred,
5861 struct rpc_task_setup task_setup_data = {
5862 .task = &data->task,
5863 .rpc_client = NFS_CLIENT(data->args.inode),
5864 .rpc_message = &msg,
5865 .callback_ops = &nfs4_layoutcommit_ops,
5866 .callback_data = data,
5867 .flags = RPC_TASK_ASYNC,
5869 struct rpc_task *task;
5872 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5873 "lbw: %llu inode %lu\n",
5874 data->task.tk_pid, sync,
5875 data->args.lastbytewritten,
5876 data->args.inode->i_ino);
5878 task = rpc_run_task(&task_setup_data);
5880 return PTR_ERR(task);
5883 status = nfs4_wait_for_completion_rpc_task(task);
5886 status = task->tk_status;
5888 dprintk("%s: status %d\n", __func__, status);
5892 #endif /* CONFIG_NFS_V4_1 */
5894 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5895 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5896 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5897 .recover_open = nfs4_open_reclaim,
5898 .recover_lock = nfs4_lock_reclaim,
5899 .establish_clid = nfs4_init_clientid,
5900 .get_clid_cred = nfs4_get_setclientid_cred,
5903 #if defined(CONFIG_NFS_V4_1)
5904 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5905 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5906 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5907 .recover_open = nfs4_open_reclaim,
5908 .recover_lock = nfs4_lock_reclaim,
5909 .establish_clid = nfs41_init_clientid,
5910 .get_clid_cred = nfs4_get_exchange_id_cred,
5911 .reclaim_complete = nfs41_proc_reclaim_complete,
5913 #endif /* CONFIG_NFS_V4_1 */
5915 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5916 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5917 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5918 .recover_open = nfs4_open_expired,
5919 .recover_lock = nfs4_lock_expired,
5920 .establish_clid = nfs4_init_clientid,
5921 .get_clid_cred = nfs4_get_setclientid_cred,
5924 #if defined(CONFIG_NFS_V4_1)
5925 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5926 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5927 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5928 .recover_open = nfs4_open_expired,
5929 .recover_lock = nfs4_lock_expired,
5930 .establish_clid = nfs41_init_clientid,
5931 .get_clid_cred = nfs4_get_exchange_id_cred,
5933 #endif /* CONFIG_NFS_V4_1 */
5935 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5936 .sched_state_renewal = nfs4_proc_async_renew,
5937 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5938 .renew_lease = nfs4_proc_renew,
5941 #if defined(CONFIG_NFS_V4_1)
5942 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5943 .sched_state_renewal = nfs41_proc_async_sequence,
5944 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5945 .renew_lease = nfs4_proc_sequence,
5949 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5951 .call_sync = _nfs4_call_sync,
5952 .validate_stateid = nfs4_validate_delegation_stateid,
5953 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5954 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5955 .state_renewal_ops = &nfs40_state_renewal_ops,
5958 #if defined(CONFIG_NFS_V4_1)
5959 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5961 .call_sync = _nfs4_call_sync_session,
5962 .validate_stateid = nfs41_validate_delegation_stateid,
5963 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5964 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5965 .state_renewal_ops = &nfs41_state_renewal_ops,
5969 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5970 [0] = &nfs_v4_0_minor_ops,
5971 #if defined(CONFIG_NFS_V4_1)
5972 [1] = &nfs_v4_1_minor_ops,
5976 static const struct inode_operations nfs4_file_inode_operations = {
5977 .permission = nfs_permission,
5978 .getattr = nfs_getattr,
5979 .setattr = nfs_setattr,
5980 .getxattr = generic_getxattr,
5981 .setxattr = generic_setxattr,
5982 .listxattr = generic_listxattr,
5983 .removexattr = generic_removexattr,
5986 const struct nfs_rpc_ops nfs_v4_clientops = {
5987 .version = 4, /* protocol version */
5988 .dentry_ops = &nfs4_dentry_operations,
5989 .dir_inode_ops = &nfs4_dir_inode_operations,
5990 .file_inode_ops = &nfs4_file_inode_operations,
5991 .getroot = nfs4_proc_get_root,
5992 .getattr = nfs4_proc_getattr,
5993 .setattr = nfs4_proc_setattr,
5994 .lookupfh = nfs4_proc_lookupfh,
5995 .lookup = nfs4_proc_lookup,
5996 .access = nfs4_proc_access,
5997 .readlink = nfs4_proc_readlink,
5998 .create = nfs4_proc_create,
5999 .remove = nfs4_proc_remove,
6000 .unlink_setup = nfs4_proc_unlink_setup,
6001 .unlink_done = nfs4_proc_unlink_done,
6002 .rename = nfs4_proc_rename,
6003 .rename_setup = nfs4_proc_rename_setup,
6004 .rename_done = nfs4_proc_rename_done,
6005 .link = nfs4_proc_link,
6006 .symlink = nfs4_proc_symlink,
6007 .mkdir = nfs4_proc_mkdir,
6008 .rmdir = nfs4_proc_remove,
6009 .readdir = nfs4_proc_readdir,
6010 .mknod = nfs4_proc_mknod,
6011 .statfs = nfs4_proc_statfs,
6012 .fsinfo = nfs4_proc_fsinfo,
6013 .pathconf = nfs4_proc_pathconf,
6014 .set_capabilities = nfs4_server_capabilities,
6015 .decode_dirent = nfs4_decode_dirent,
6016 .read_setup = nfs4_proc_read_setup,
6017 .read_done = nfs4_read_done,
6018 .write_setup = nfs4_proc_write_setup,
6019 .write_done = nfs4_write_done,
6020 .commit_setup = nfs4_proc_commit_setup,
6021 .commit_done = nfs4_commit_done,
6022 .lock = nfs4_proc_lock,
6023 .clear_acl_cache = nfs4_zap_acl_attr,
6024 .close_context = nfs4_close_context,
6025 .open_context = nfs4_atomic_open,
6026 .init_client = nfs4_init_client,
6027 .secinfo = nfs4_proc_secinfo,
6030 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6031 .prefix = XATTR_NAME_NFSV4_ACL,
6032 .list = nfs4_xattr_list_nfs4_acl,
6033 .get = nfs4_xattr_get_nfs4_acl,
6034 .set = nfs4_xattr_set_nfs4_acl,
6037 const struct xattr_handler *nfs4_xattr_handlers[] = {
6038 &nfs4_xattr_nfs4_acl_handler,