4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
77 static int _nfs4_proc_open(struct nfs4_opendata *data);
78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
116 nfs4_label_release_security(struct nfs4_label *label)
119 security_release_secctx(label->label, label->len);
121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
124 return server->attr_bitmask;
126 return server->attr_bitmask_nl;
129 static inline struct nfs4_label *
130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
134 nfs4_label_release_security(struct nfs4_label *label)
137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 { return server->attr_bitmask; }
141 /* Prevent leaks of NFSv4 errors into userland */
142 static int nfs4_map_errors(int err)
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
157 case -NFS4ERR_SHARE_DENIED:
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_ACCESS:
163 case -NFS4ERR_FILE_OPEN:
166 dprintk("%s could not handle NFSv4 error %d\n",
174 * This is our standard bitmap for GETATTR requests.
176 const u32 nfs4_fattr_bitmap[3] = {
178 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_FILEID,
183 | FATTR4_WORD1_NUMLINKS
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
190 | FATTR4_WORD1_TIME_MODIFY,
191 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
196 static const u32 nfs4_pnfs_open_bitmap[3] = {
198 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_FILEID,
203 | FATTR4_WORD1_NUMLINKS
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
214 static const u32 nfs4_open_noattr_bitmap[3] = {
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
220 const u32 nfs4_statfs_bitmap[3] = {
221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
229 const u32 nfs4_pathconf_bitmap[3] = {
231 | FATTR4_WORD0_MAXNAME,
235 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
239 FATTR4_WORD1_TIME_DELTA
240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
244 const u32 nfs4_fs_locations_bitmap[3] = {
246 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
252 | FATTR4_WORD1_NUMLINKS
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
269 readdir->cookie = cookie;
270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
286 start = p = kmap_atomic(*readdir->pages);
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
317 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
327 freezable_schedule_timeout_killable_unsafe(*timeout);
328 if (fatal_signal_pending(current))
334 /* This is the error handling routine for processes that are allowed
337 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
339 struct nfs_client *clp = server->nfs_client;
340 struct nfs4_state *state = exception->state;
341 struct inode *inode = exception->inode;
344 exception->retry = 0;
348 case -NFS4ERR_OPENMODE:
349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
350 nfs4_inode_return_delegation(inode);
351 exception->retry = 1;
356 ret = nfs4_schedule_stateid_recovery(server, state);
359 goto wait_on_recovery;
360 case -NFS4ERR_DELEG_REVOKED:
361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
370 ret = nfs4_schedule_stateid_recovery(server, state);
373 goto wait_on_recovery;
374 case -NFS4ERR_EXPIRED:
376 ret = nfs4_schedule_stateid_recovery(server, state);
380 case -NFS4ERR_STALE_STATEID:
381 case -NFS4ERR_STALE_CLIENTID:
382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
385 ret = nfs4_schedule_migration_recovery(server);
388 goto wait_on_recovery;
389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
392 #if defined(CONFIG_NFS_V4_1)
393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
403 goto wait_on_recovery;
404 #endif /* defined(CONFIG_NFS_V4_1) */
405 case -NFS4ERR_FILE_OPEN:
406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
415 ret = nfs4_delay(server->client, &exception->timeout);
418 case -NFS4ERR_RETRY_UNCACHED_REP:
419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
438 ret = nfs4_wait_clnt_recover(clp);
439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
442 exception->retry = 1;
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
450 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
461 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
469 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
471 do_renew_lease(server->nfs_client, timestamp);
474 struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
480 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
490 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
492 args->sa_privileged = 1;
495 static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 slot = nfs4_alloc_slot(tbl);
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
517 spin_unlock(&tbl->slot_tbl_lock);
519 args->sa_slot = slot;
523 rpc_call_start(task);
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
536 static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
556 #if defined(CONFIG_NFS_V4_1)
558 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
560 struct nfs4_session *session;
561 struct nfs4_slot_table *tbl;
562 struct nfs4_slot *slot = res->sr_slot;
563 bool send_new_highest_used_slotid = false;
566 session = tbl->session;
568 spin_lock(&tbl->slot_tbl_lock);
569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
576 send_new_highest_used_slotid = false;
579 nfs4_free_slot(tbl, slot);
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
584 spin_unlock(&tbl->slot_tbl_lock);
586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
590 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
592 struct nfs4_session *session;
593 struct nfs4_slot *slot = res->sr_slot;
594 struct nfs_client *clp;
595 bool interrupted = false;
600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
604 session = slot->table->session;
606 if (slot->interrupted) {
607 slot->interrupted = 0;
611 trace_nfs4_sequence_done(session, res);
612 /* Check the SEQUENCE operation status */
613 switch (res->sr_status) {
615 /* Update the slot's sequence and clientid lease timer */
618 do_renew_lease(clp, res->sr_timestamp);
619 /* Check sequence flags */
620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
622 nfs41_update_target_slotid(slot->table, slot, res);
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
629 * Mark the slot as having hosted an interrupted RPC call.
631 slot->interrupted = 1;
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
643 case -NFS4ERR_BADSLOT:
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
649 case -NFS4ERR_SEQ_MISORDERED:
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
662 if (slot->seq_nr != 1) {
667 case -NFS4ERR_SEQ_FALSE_RETRY:
671 /* Just update the slot sequence no. */
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
677 nfs41_sequence_free_slot(res);
681 if (rpc_restart_call_prepare(task)) {
687 if (!rpc_restart_call(task))
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
692 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
694 static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
697 if (res->sr_slot == NULL)
699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
701 return nfs41_sequence_done(task, res);
704 int nfs41_setup_sequence(struct nfs4_session *session,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 struct rpc_task *task)
709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
712 dprintk("--> %s\n", __func__);
713 /* slot already allocated? */
714 if (res->sr_slot != NULL)
717 tbl = &session->fc_slot_table;
719 task->tk_timeout = 0;
721 spin_lock(&tbl->slot_tbl_lock);
722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
723 !args->sa_privileged) {
724 /* The state manager will wait until the slot table is empty */
725 dprintk("%s session is draining\n", __func__);
729 slot = nfs4_alloc_slot(tbl);
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
734 dprintk("<-- %s: no free slots\n", __func__);
737 spin_unlock(&tbl->slot_tbl_lock);
739 args->sa_slot = slot;
741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
742 slot->slot_nr, slot->seq_nr);
745 res->sr_timestamp = jiffies;
746 res->sr_status_flags = 0;
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
752 trace_nfs4_setup_sequence(session, args);
754 rpc_call_start(task);
757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
763 spin_unlock(&tbl->slot_tbl_lock);
766 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
768 static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
773 struct nfs4_session *session = nfs4_get_session(server);
777 return nfs40_setup_sequence(server, args, res, task);
779 dprintk("--> %s clp %p session %p sr_slot %u\n",
780 __func__, session->clp, session, res->sr_slot ?
781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
783 ret = nfs41_setup_sequence(session, args, res, task);
785 dprintk("<-- %s status=%d\n", __func__, ret);
789 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
791 struct nfs4_call_sync_data *data = calldata;
792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
799 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
801 struct nfs4_call_sync_data *data = calldata;
803 nfs41_sequence_done(task, data->seq_res);
806 static const struct rpc_call_ops nfs41_call_sync_ops = {
807 .rpc_call_prepare = nfs41_call_sync_prepare,
808 .rpc_call_done = nfs41_call_sync_done,
811 #else /* !CONFIG_NFS_V4_1 */
813 static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
818 return nfs40_setup_sequence(server, args, res, task);
821 static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
824 return nfs40_sequence_done(task, res);
827 #endif /* !CONFIG_NFS_V4_1 */
829 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
836 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
842 static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
847 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
851 struct nfs4_sequence_res *res)
854 struct rpc_task *task;
855 struct nfs_client *clp = server->nfs_client;
856 struct nfs4_call_sync_data data = {
857 .seq_server = server,
861 struct rpc_task_setup task_setup = {
864 .callback_ops = clp->cl_mvops->call_sync_ops,
865 .callback_data = &data
868 task = rpc_run_task(&task_setup);
872 ret = task->tk_status;
879 int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
886 nfs4_init_sequence(args, res, cache_reply);
887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
890 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
892 struct nfs_inode *nfsi = NFS_I(dir);
894 spin_lock(&dir->i_lock);
895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
896 if (!cinfo->atomic || cinfo->before != dir->i_version)
897 nfs_force_lookup_revalidate(dir);
898 dir->i_version = cinfo->after;
899 nfs_fscache_invalidate(dir);
900 spin_unlock(&dir->i_lock);
903 struct nfs4_opendata {
905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
911 struct nfs_fattr f_attr;
912 struct nfs4_label *f_label;
914 struct dentry *dentry;
915 struct nfs4_state_owner *owner;
916 struct nfs4_state *state;
918 unsigned long timestamp;
919 unsigned int rpc_done : 1;
920 unsigned int file_created : 1;
921 unsigned int is_recover : 1;
926 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
938 static enum open_claim_type4
939 nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
956 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
958 p->o_res.f_attr = &p->f_attr;
959 p->o_res.f_label = p->f_label;
960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
962 p->o_res.server = p->o_arg.server;
963 p->o_res.access_request = p->o_arg.access;
964 nfs_fattr_init(&p->f_attr);
965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
968 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
970 const struct iattr *attrs,
971 struct nfs4_label *label,
972 enum open_claim_type4 claim,
975 struct dentry *parent = dget_parent(dentry);
976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
980 p = kzalloc(sizeof(*p), gfp_mask);
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
989 if (p->o_arg.seqid == NULL)
991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
995 atomic_inc(&sp->so_count);
996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1009 p->o_arg.name = &dentry->d_name;
1010 p->o_arg.server = server;
1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1013 p->o_arg.label = label;
1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1027 if (attrs != NULL && attrs->ia_valid != 0) {
1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
1041 nfs4_init_opendata_res(p);
1042 kref_init(&p->kref);
1046 nfs4_label_free(p->f_label);
1054 static void nfs4_opendata_free(struct kref *kref)
1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
1058 struct super_block *sb = p->dentry->d_sb;
1060 nfs_free_seqid(p->o_arg.seqid);
1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
1063 nfs4_put_state_owner(p->owner);
1065 nfs4_label_free(p->f_label);
1069 nfs_sb_deactive(sb);
1070 nfs_fattr_free_names(&p->f_attr);
1071 kfree(p->f_attr.mdsthreshold);
1075 static void nfs4_opendata_put(struct nfs4_opendata *p)
1078 kref_put(&p->kref, nfs4_opendata_free);
1081 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1085 ret = rpc_wait_for_completion_task(task);
1089 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1093 if (open_mode & (O_EXCL|O_TRUNC))
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
1104 case FMODE_READ|FMODE_WRITE:
1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
1112 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1114 if (delegation == NULL)
1116 if ((delegation->type & fmode) != fmode)
1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 nfs_mark_delegation_referenced(delegation);
1126 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1135 case FMODE_READ|FMODE_WRITE:
1138 nfs4_state_set_mode_locked(state, state->state | fmode);
1141 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1156 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1170 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1186 if (stateid == NULL)
1188 if (!nfs_need_update_open_stateid(state, stateid))
1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
1195 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1204 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1216 if (!nfs_need_update_open_stateid(state, stateid))
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
1223 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1229 write_seqlock(&state->seqlock);
1230 if (deleg_stateid != NULL) {
1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1234 if (open_stateid != NULL)
1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
1238 update_open_stateflags(state, fmode);
1239 spin_unlock(&state->owner->so_lock);
1242 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1248 fmode &= (FMODE_READ|FMODE_WRITE);
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1255 spin_lock(&deleg_cur->lock);
1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1258 (deleg_cur->type & fmode) != fmode)
1259 goto no_delegation_unlock;
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1264 goto no_delegation_unlock;
1266 nfs_mark_delegation_referenced(deleg_cur);
1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1269 no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1274 if (!ret && open_stateid != NULL) {
1275 __update_open_stateid(state, open_stateid, NULL, fmode);
1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1285 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1287 struct nfs_delegation *delegation;
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1296 nfs4_inode_return_delegation(inode);
1299 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
1304 int open_mode = opendata->o_arg.open_flags;
1305 fmode_t fmode = opendata->o_arg.fmode;
1306 nfs4_stateid stateid;
1310 spin_lock(&state->owner->so_lock);
1311 if (can_open_cached(state, fmode, open_mode)) {
1312 update_open_stateflags(state, fmode);
1313 spin_unlock(&state->owner->so_lock);
1314 goto out_return_state;
1316 spin_unlock(&state->owner->so_lock);
1318 delegation = rcu_dereference(nfsi->delegation);
1319 if (!can_open_delegated(delegation, fmode)) {
1323 /* Save the delegation */
1324 nfs4_stateid_copy(&stateid, &delegation->stateid);
1326 nfs_release_seqid(opendata->o_arg.seqid);
1327 if (!opendata->is_recover) {
1328 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1334 /* Try to update the stateid using the delegation */
1335 if (update_open_stateid(state, NULL, &stateid, fmode))
1336 goto out_return_state;
1339 return ERR_PTR(ret);
1341 atomic_inc(&state->count);
1346 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1348 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1349 struct nfs_delegation *delegation;
1350 int delegation_flags = 0;
1353 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1355 delegation_flags = delegation->flags;
1357 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1358 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1359 "returning a delegation for "
1360 "OPEN(CLAIM_DELEGATE_CUR)\n",
1362 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1363 nfs_inode_set_delegation(state->inode,
1364 data->owner->so_cred,
1367 nfs_inode_reclaim_delegation(state->inode,
1368 data->owner->so_cred,
1373 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1374 * and update the nfs4_state.
1376 static struct nfs4_state *
1377 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1379 struct inode *inode = data->state->inode;
1380 struct nfs4_state *state = data->state;
1383 if (!data->rpc_done) {
1384 if (data->rpc_status) {
1385 ret = data->rpc_status;
1388 /* cached opens have already been processed */
1392 ret = nfs_refresh_inode(inode, &data->f_attr);
1396 if (data->o_res.delegation_type != 0)
1397 nfs4_opendata_check_deleg(data, state);
1399 update_open_stateid(state, &data->o_res.stateid, NULL,
1401 atomic_inc(&state->count);
1405 return ERR_PTR(ret);
1409 static struct nfs4_state *
1410 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1412 struct inode *inode;
1413 struct nfs4_state *state = NULL;
1416 if (!data->rpc_done) {
1417 state = nfs4_try_open_cached(data);
1422 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1424 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1425 ret = PTR_ERR(inode);
1429 state = nfs4_get_open_state(inode, data->owner);
1432 if (data->o_res.delegation_type != 0)
1433 nfs4_opendata_check_deleg(data, state);
1434 update_open_stateid(state, &data->o_res.stateid, NULL,
1438 nfs_release_seqid(data->o_arg.seqid);
1443 return ERR_PTR(ret);
1446 static struct nfs4_state *
1447 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1449 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1450 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1451 return _nfs4_opendata_to_nfs4_state(data);
1454 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1456 struct nfs_inode *nfsi = NFS_I(state->inode);
1457 struct nfs_open_context *ctx;
1459 spin_lock(&state->inode->i_lock);
1460 list_for_each_entry(ctx, &nfsi->open_files, list) {
1461 if (ctx->state != state)
1463 get_nfs_open_context(ctx);
1464 spin_unlock(&state->inode->i_lock);
1467 spin_unlock(&state->inode->i_lock);
1468 return ERR_PTR(-ENOENT);
1471 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1472 struct nfs4_state *state, enum open_claim_type4 claim)
1474 struct nfs4_opendata *opendata;
1476 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1477 NULL, NULL, claim, GFP_NOFS);
1478 if (opendata == NULL)
1479 return ERR_PTR(-ENOMEM);
1480 opendata->state = state;
1481 atomic_inc(&state->count);
1485 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1487 struct nfs4_state *newstate;
1490 opendata->o_arg.open_flags = 0;
1491 opendata->o_arg.fmode = fmode;
1492 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1493 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1494 nfs4_init_opendata_res(opendata);
1495 ret = _nfs4_recover_proc_open(opendata);
1498 newstate = nfs4_opendata_to_nfs4_state(opendata);
1499 if (IS_ERR(newstate))
1500 return PTR_ERR(newstate);
1501 nfs4_close_state(newstate, fmode);
1506 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1508 struct nfs4_state *newstate;
1511 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1512 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1513 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1514 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1515 /* memory barrier prior to reading state->n_* */
1516 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1517 clear_bit(NFS_OPEN_STATE, &state->flags);
1519 if (state->n_rdwr != 0) {
1520 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1523 if (newstate != state)
1526 if (state->n_wronly != 0) {
1527 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1530 if (newstate != state)
1533 if (state->n_rdonly != 0) {
1534 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1537 if (newstate != state)
1541 * We may have performed cached opens for all three recoveries.
1542 * Check if we need to update the current stateid.
1544 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1545 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1546 write_seqlock(&state->seqlock);
1547 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1548 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1549 write_sequnlock(&state->seqlock);
1556 * reclaim state on the server after a reboot.
1558 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1560 struct nfs_delegation *delegation;
1561 struct nfs4_opendata *opendata;
1562 fmode_t delegation_type = 0;
1565 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1566 NFS4_OPEN_CLAIM_PREVIOUS);
1567 if (IS_ERR(opendata))
1568 return PTR_ERR(opendata);
1570 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1571 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1572 delegation_type = delegation->type;
1574 opendata->o_arg.u.delegation_type = delegation_type;
1575 status = nfs4_open_recover(opendata, state);
1576 nfs4_opendata_put(opendata);
1580 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1582 struct nfs_server *server = NFS_SERVER(state->inode);
1583 struct nfs4_exception exception = { };
1586 err = _nfs4_do_open_reclaim(ctx, state);
1587 trace_nfs4_open_reclaim(ctx, 0, err);
1588 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1590 if (err != -NFS4ERR_DELAY)
1592 nfs4_handle_exception(server, err, &exception);
1593 } while (exception.retry);
1597 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1599 struct nfs_open_context *ctx;
1602 ctx = nfs4_state_find_open_context(state);
1605 ret = nfs4_do_open_reclaim(ctx, state);
1606 put_nfs_open_context(ctx);
1610 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1614 printk(KERN_ERR "NFS: %s: unhandled error "
1615 "%d.\n", __func__, err);
1620 case -NFS4ERR_BADSESSION:
1621 case -NFS4ERR_BADSLOT:
1622 case -NFS4ERR_BAD_HIGH_SLOT:
1623 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1624 case -NFS4ERR_DEADSESSION:
1625 set_bit(NFS_DELEGATED_STATE, &state->flags);
1626 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1628 case -NFS4ERR_STALE_CLIENTID:
1629 case -NFS4ERR_STALE_STATEID:
1630 set_bit(NFS_DELEGATED_STATE, &state->flags);
1631 case -NFS4ERR_EXPIRED:
1632 /* Don't recall a delegation if it was lost */
1633 nfs4_schedule_lease_recovery(server->nfs_client);
1635 case -NFS4ERR_MOVED:
1636 nfs4_schedule_migration_recovery(server);
1638 case -NFS4ERR_LEASE_MOVED:
1639 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1641 case -NFS4ERR_DELEG_REVOKED:
1642 case -NFS4ERR_ADMIN_REVOKED:
1643 case -NFS4ERR_BAD_STATEID:
1644 case -NFS4ERR_OPENMODE:
1645 nfs_inode_find_state_and_recover(state->inode,
1647 nfs4_schedule_stateid_recovery(server, state);
1649 case -NFS4ERR_DELAY:
1650 case -NFS4ERR_GRACE:
1651 set_bit(NFS_DELEGATED_STATE, &state->flags);
1655 case -NFS4ERR_DENIED:
1656 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1662 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1664 struct nfs_server *server = NFS_SERVER(state->inode);
1665 struct nfs4_opendata *opendata;
1668 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1669 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1670 if (IS_ERR(opendata))
1671 return PTR_ERR(opendata);
1672 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1673 err = nfs4_open_recover(opendata, state);
1674 nfs4_opendata_put(opendata);
1675 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1680 struct nfs4_opendata *data = calldata;
1682 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1683 &data->c_res.seq_res, task);
1686 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1688 struct nfs4_opendata *data = calldata;
1690 nfs40_sequence_done(task, &data->c_res.seq_res);
1692 data->rpc_status = task->tk_status;
1693 if (data->rpc_status == 0) {
1694 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1696 renew_lease(data->o_res.server, data->timestamp);
1701 static void nfs4_open_confirm_release(void *calldata)
1703 struct nfs4_opendata *data = calldata;
1704 struct nfs4_state *state = NULL;
1706 /* If this request hasn't been cancelled, do nothing */
1707 if (data->cancelled == 0)
1709 /* In case of error, no cleanup! */
1710 if (!data->rpc_done)
1712 state = nfs4_opendata_to_nfs4_state(data);
1714 nfs4_close_state(state, data->o_arg.fmode);
1716 nfs4_opendata_put(data);
1719 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1720 .rpc_call_prepare = nfs4_open_confirm_prepare,
1721 .rpc_call_done = nfs4_open_confirm_done,
1722 .rpc_release = nfs4_open_confirm_release,
1726 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1728 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1730 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1731 struct rpc_task *task;
1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1734 .rpc_argp = &data->c_arg,
1735 .rpc_resp = &data->c_res,
1736 .rpc_cred = data->owner->so_cred,
1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
1740 .rpc_message = &msg,
1741 .callback_ops = &nfs4_open_confirm_ops,
1742 .callback_data = data,
1743 .workqueue = nfsiod_workqueue,
1744 .flags = RPC_TASK_ASYNC,
1748 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1749 kref_get(&data->kref);
1751 data->rpc_status = 0;
1752 data->timestamp = jiffies;
1753 task = rpc_run_task(&task_setup_data);
1755 return PTR_ERR(task);
1756 status = nfs4_wait_for_completion_rpc_task(task);
1758 data->cancelled = 1;
1761 status = data->rpc_status;
1766 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1768 struct nfs4_opendata *data = calldata;
1769 struct nfs4_state_owner *sp = data->owner;
1770 struct nfs_client *clp = sp->so_server->nfs_client;
1772 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1775 * Check if we still need to send an OPEN call, or if we can use
1776 * a delegation instead.
1778 if (data->state != NULL) {
1779 struct nfs_delegation *delegation;
1781 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1784 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1785 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1786 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1787 can_open_delegated(delegation, data->o_arg.fmode))
1788 goto unlock_no_action;
1791 /* Update client id. */
1792 data->o_arg.clientid = clp->cl_clientid;
1793 switch (data->o_arg.claim) {
1794 case NFS4_OPEN_CLAIM_PREVIOUS:
1795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1796 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1797 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1798 case NFS4_OPEN_CLAIM_FH:
1799 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1800 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1802 data->timestamp = jiffies;
1803 if (nfs4_setup_sequence(data->o_arg.server,
1804 &data->o_arg.seq_args,
1805 &data->o_res.seq_res,
1807 nfs_release_seqid(data->o_arg.seqid);
1809 /* Set the create mode (note dependency on the session type) */
1810 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1811 if (data->o_arg.open_flags & O_EXCL) {
1812 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1813 if (nfs4_has_persistent_session(clp))
1814 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1815 else if (clp->cl_mvops->minor_version > 0)
1816 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1822 task->tk_action = NULL;
1824 nfs4_sequence_done(task, &data->o_res.seq_res);
1827 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1829 struct nfs4_opendata *data = calldata;
1831 data->rpc_status = task->tk_status;
1833 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 if (task->tk_status == 0) {
1837 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1838 switch (data->o_res.f_attr->mode & S_IFMT) {
1842 data->rpc_status = -ELOOP;
1845 data->rpc_status = -EISDIR;
1848 data->rpc_status = -ENOTDIR;
1851 renew_lease(data->o_res.server, data->timestamp);
1852 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1853 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1858 static void nfs4_open_release(void *calldata)
1860 struct nfs4_opendata *data = calldata;
1861 struct nfs4_state *state = NULL;
1863 /* If this request hasn't been cancelled, do nothing */
1864 if (data->cancelled == 0)
1866 /* In case of error, no cleanup! */
1867 if (data->rpc_status != 0 || !data->rpc_done)
1869 /* In case we need an open_confirm, no cleanup! */
1870 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1872 state = nfs4_opendata_to_nfs4_state(data);
1874 nfs4_close_state(state, data->o_arg.fmode);
1876 nfs4_opendata_put(data);
1879 static const struct rpc_call_ops nfs4_open_ops = {
1880 .rpc_call_prepare = nfs4_open_prepare,
1881 .rpc_call_done = nfs4_open_done,
1882 .rpc_release = nfs4_open_release,
1885 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1887 struct inode *dir = data->dir->d_inode;
1888 struct nfs_server *server = NFS_SERVER(dir);
1889 struct nfs_openargs *o_arg = &data->o_arg;
1890 struct nfs_openres *o_res = &data->o_res;
1891 struct rpc_task *task;
1892 struct rpc_message msg = {
1893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_cred = data->owner->so_cred,
1898 struct rpc_task_setup task_setup_data = {
1899 .rpc_client = server->client,
1900 .rpc_message = &msg,
1901 .callback_ops = &nfs4_open_ops,
1902 .callback_data = data,
1903 .workqueue = nfsiod_workqueue,
1904 .flags = RPC_TASK_ASYNC,
1908 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1909 kref_get(&data->kref);
1911 data->rpc_status = 0;
1912 data->cancelled = 0;
1913 data->is_recover = 0;
1915 nfs4_set_sequence_privileged(&o_arg->seq_args);
1916 data->is_recover = 1;
1918 task = rpc_run_task(&task_setup_data);
1920 return PTR_ERR(task);
1921 status = nfs4_wait_for_completion_rpc_task(task);
1923 data->cancelled = 1;
1926 status = data->rpc_status;
1932 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1934 struct inode *dir = data->dir->d_inode;
1935 struct nfs_openres *o_res = &data->o_res;
1938 status = nfs4_run_open_task(data, 1);
1939 if (status != 0 || !data->rpc_done)
1942 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1944 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1945 status = _nfs4_proc_open_confirm(data);
1954 * Additional permission checks in order to distinguish between an
1955 * open for read, and an open for execute. This works around the
1956 * fact that NFSv4 OPEN treats read and execute permissions as being
1958 * Note that in the non-execute case, we want to turn off permission
1959 * checking if we just created a new file (POSIX open() semantics).
1961 static int nfs4_opendata_access(struct rpc_cred *cred,
1962 struct nfs4_opendata *opendata,
1963 struct nfs4_state *state, fmode_t fmode,
1966 struct nfs_access_entry cache;
1969 /* access call failed or for some reason the server doesn't
1970 * support any access modes -- defer access call until later */
1971 if (opendata->o_res.access_supported == 0)
1976 * Use openflags to check for exec, because fmode won't
1977 * always have FMODE_EXEC set when file open for exec.
1979 if (openflags & __FMODE_EXEC) {
1980 /* ONLY check for exec rights */
1982 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1986 cache.jiffies = jiffies;
1987 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1988 nfs_access_add_cache(state->inode, &cache);
1990 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1993 /* even though OPEN succeeded, access is denied. Close the file */
1994 nfs4_close_state(state, fmode);
1999 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2001 static int _nfs4_proc_open(struct nfs4_opendata *data)
2003 struct inode *dir = data->dir->d_inode;
2004 struct nfs_server *server = NFS_SERVER(dir);
2005 struct nfs_openargs *o_arg = &data->o_arg;
2006 struct nfs_openres *o_res = &data->o_res;
2009 status = nfs4_run_open_task(data, 0);
2010 if (!data->rpc_done)
2013 if (status == -NFS4ERR_BADNAME &&
2014 !(o_arg->open_flags & O_CREAT))
2019 nfs_fattr_map_and_free_names(server, &data->f_attr);
2021 if (o_arg->open_flags & O_CREAT) {
2022 update_changeattr(dir, &o_res->cinfo);
2023 if (o_arg->open_flags & O_EXCL)
2024 data->file_created = 1;
2025 else if (o_res->cinfo.before != o_res->cinfo.after)
2026 data->file_created = 1;
2028 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2029 server->caps &= ~NFS_CAP_POSIX_LOCK;
2030 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2031 status = _nfs4_proc_open_confirm(data);
2035 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2036 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2040 static int nfs4_recover_expired_lease(struct nfs_server *server)
2042 return nfs4_client_recover_expired_lease(server->nfs_client);
2047 * reclaim state on the server after a network partition.
2048 * Assumes caller holds the appropriate lock
2050 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2052 struct nfs4_opendata *opendata;
2055 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2056 NFS4_OPEN_CLAIM_FH);
2057 if (IS_ERR(opendata))
2058 return PTR_ERR(opendata);
2059 ret = nfs4_open_recover(opendata, state);
2061 d_drop(ctx->dentry);
2062 nfs4_opendata_put(opendata);
2066 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2068 struct nfs_server *server = NFS_SERVER(state->inode);
2069 struct nfs4_exception exception = { };
2073 err = _nfs4_open_expired(ctx, state);
2074 trace_nfs4_open_expired(ctx, 0, err);
2075 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2080 case -NFS4ERR_GRACE:
2081 case -NFS4ERR_DELAY:
2082 nfs4_handle_exception(server, err, &exception);
2085 } while (exception.retry);
2090 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2092 struct nfs_open_context *ctx;
2095 ctx = nfs4_state_find_open_context(state);
2098 ret = nfs4_do_open_expired(ctx, state);
2099 put_nfs_open_context(ctx);
2103 #if defined(CONFIG_NFS_V4_1)
2104 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
2106 struct nfs_server *server = NFS_SERVER(state->inode);
2107 nfs4_stateid *stateid = &state->stateid;
2108 struct nfs_delegation *delegation;
2109 struct rpc_cred *cred = NULL;
2110 int status = -NFS4ERR_BAD_STATEID;
2112 /* If a state reset has been done, test_stateid is unneeded */
2113 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2116 /* Get the delegation credential for use by test/free_stateid */
2118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2119 if (delegation != NULL &&
2120 nfs4_stateid_match(&delegation->stateid, stateid)) {
2121 cred = get_rpccred(delegation->cred);
2123 status = nfs41_test_stateid(server, stateid, cred);
2124 trace_nfs4_test_delegation_stateid(state, NULL, status);
2128 if (status != NFS_OK) {
2129 /* Free the stateid unless the server explicitly
2130 * informs us the stateid is unrecognized. */
2131 if (status != -NFS4ERR_BAD_STATEID)
2132 nfs41_free_stateid(server, stateid, cred);
2133 nfs_remove_bad_delegation(state->inode);
2135 write_seqlock(&state->seqlock);
2136 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2137 write_sequnlock(&state->seqlock);
2138 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2146 * nfs41_check_open_stateid - possibly free an open stateid
2148 * @state: NFSv4 state for an inode
2150 * Returns NFS_OK if recovery for this stateid is now finished.
2151 * Otherwise a negative NFS4ERR value is returned.
2153 static int nfs41_check_open_stateid(struct nfs4_state *state)
2155 struct nfs_server *server = NFS_SERVER(state->inode);
2156 nfs4_stateid *stateid = &state->open_stateid;
2157 struct rpc_cred *cred = state->owner->so_cred;
2160 /* If a state reset has been done, test_stateid is unneeded */
2161 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2162 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2163 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2164 return -NFS4ERR_BAD_STATEID;
2166 status = nfs41_test_stateid(server, stateid, cred);
2167 trace_nfs4_test_open_stateid(state, NULL, status);
2168 if (status != NFS_OK) {
2169 /* Free the stateid unless the server explicitly
2170 * informs us the stateid is unrecognized. */
2171 if (status != -NFS4ERR_BAD_STATEID)
2172 nfs41_free_stateid(server, stateid, cred);
2174 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2175 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2176 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2177 clear_bit(NFS_OPEN_STATE, &state->flags);
2182 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2186 nfs41_clear_delegation_stateid(state);
2187 status = nfs41_check_open_stateid(state);
2188 if (status != NFS_OK)
2189 status = nfs4_open_expired(sp, state);
2195 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2196 * fields corresponding to attributes that were used to store the verifier.
2197 * Make sure we clobber those fields in the later setattr call
2199 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2201 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2202 !(sattr->ia_valid & ATTR_ATIME_SET))
2203 sattr->ia_valid |= ATTR_ATIME;
2205 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2206 !(sattr->ia_valid & ATTR_MTIME_SET))
2207 sattr->ia_valid |= ATTR_MTIME;
2210 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2213 struct nfs_open_context *ctx)
2215 struct nfs4_state_owner *sp = opendata->owner;
2216 struct nfs_server *server = sp->so_server;
2217 struct dentry *dentry;
2218 struct nfs4_state *state;
2222 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2224 ret = _nfs4_proc_open(opendata);
2226 if (ret == -ENOENT) {
2227 d_drop(opendata->dentry);
2228 d_add(opendata->dentry, NULL);
2229 nfs_set_verifier(opendata->dentry,
2230 nfs_save_change_attribute(opendata->dir->d_inode));
2235 state = nfs4_opendata_to_nfs4_state(opendata);
2236 ret = PTR_ERR(state);
2239 if (server->caps & NFS_CAP_POSIX_LOCK)
2240 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2242 dentry = opendata->dentry;
2243 if (dentry->d_inode == NULL) {
2244 /* FIXME: Is this d_drop() ever needed? */
2246 dentry = d_add_unique(dentry, igrab(state->inode));
2247 if (dentry == NULL) {
2248 dentry = opendata->dentry;
2249 } else if (dentry != ctx->dentry) {
2251 ctx->dentry = dget(dentry);
2253 nfs_set_verifier(dentry,
2254 nfs_save_change_attribute(opendata->dir->d_inode));
2257 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2262 if (dentry->d_inode == state->inode) {
2263 nfs_inode_attach_open_context(ctx);
2264 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2265 nfs4_schedule_stateid_recovery(server, state);
2272 * Returns a referenced nfs4_state
2274 static int _nfs4_do_open(struct inode *dir,
2275 struct nfs_open_context *ctx,
2277 struct iattr *sattr,
2278 struct nfs4_label *label,
2281 struct nfs4_state_owner *sp;
2282 struct nfs4_state *state = NULL;
2283 struct nfs_server *server = NFS_SERVER(dir);
2284 struct nfs4_opendata *opendata;
2285 struct dentry *dentry = ctx->dentry;
2286 struct rpc_cred *cred = ctx->cred;
2287 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2288 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2289 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2290 struct nfs4_label *olabel = NULL;
2293 /* Protect against reboot recovery conflicts */
2295 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2297 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2300 status = nfs4_recover_expired_lease(server);
2302 goto err_put_state_owner;
2303 if (dentry->d_inode != NULL)
2304 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2306 if (dentry->d_inode)
2307 claim = NFS4_OPEN_CLAIM_FH;
2308 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2309 label, claim, GFP_KERNEL);
2310 if (opendata == NULL)
2311 goto err_put_state_owner;
2314 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2315 if (IS_ERR(olabel)) {
2316 status = PTR_ERR(olabel);
2317 goto err_opendata_put;
2321 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2322 if (!opendata->f_attr.mdsthreshold) {
2323 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2324 if (!opendata->f_attr.mdsthreshold)
2325 goto err_free_label;
2327 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2329 if (dentry->d_inode != NULL)
2330 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2332 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2334 goto err_free_label;
2337 if ((opendata->o_arg.open_flags & O_EXCL) &&
2338 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2339 nfs4_exclusive_attrset(opendata, sattr);
2341 nfs_fattr_init(opendata->o_res.f_attr);
2342 status = nfs4_do_setattr(state->inode, cred,
2343 opendata->o_res.f_attr, sattr,
2344 state, label, olabel);
2346 nfs_setattr_update_inode(state->inode, sattr);
2347 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2348 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2351 if (opendata->file_created)
2352 *opened |= FILE_CREATED;
2354 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2355 *ctx_th = opendata->f_attr.mdsthreshold;
2356 opendata->f_attr.mdsthreshold = NULL;
2359 nfs4_label_free(olabel);
2361 nfs4_opendata_put(opendata);
2362 nfs4_put_state_owner(sp);
2365 nfs4_label_free(olabel);
2367 nfs4_opendata_put(opendata);
2368 err_put_state_owner:
2369 nfs4_put_state_owner(sp);
2375 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2376 struct nfs_open_context *ctx,
2378 struct iattr *sattr,
2379 struct nfs4_label *label,
2382 struct nfs_server *server = NFS_SERVER(dir);
2383 struct nfs4_exception exception = { };
2384 struct nfs4_state *res;
2388 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2390 trace_nfs4_open_file(ctx, flags, status);
2393 /* NOTE: BAD_SEQID means the server and client disagree about the
2394 * book-keeping w.r.t. state-changing operations
2395 * (OPEN/CLOSE/LOCK/LOCKU...)
2396 * It is actually a sign of a bug on the client or on the server.
2398 * If we receive a BAD_SEQID error in the particular case of
2399 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2400 * have unhashed the old state_owner for us, and that we can
2401 * therefore safely retry using a new one. We should still warn
2402 * the user though...
2404 if (status == -NFS4ERR_BAD_SEQID) {
2405 pr_warn_ratelimited("NFS: v4 server %s "
2406 " returned a bad sequence-id error!\n",
2407 NFS_SERVER(dir)->nfs_client->cl_hostname);
2408 exception.retry = 1;
2412 * BAD_STATEID on OPEN means that the server cancelled our
2413 * state before it received the OPEN_CONFIRM.
2414 * Recover by retrying the request as per the discussion
2415 * on Page 181 of RFC3530.
2417 if (status == -NFS4ERR_BAD_STATEID) {
2418 exception.retry = 1;
2421 if (status == -EAGAIN) {
2422 /* We must have found a delegation */
2423 exception.retry = 1;
2426 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2428 res = ERR_PTR(nfs4_handle_exception(server,
2429 status, &exception));
2430 } while (exception.retry);
2434 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2435 struct nfs_fattr *fattr, struct iattr *sattr,
2436 struct nfs4_state *state, struct nfs4_label *ilabel,
2437 struct nfs4_label *olabel)
2439 struct nfs_server *server = NFS_SERVER(inode);
2440 struct nfs_setattrargs arg = {
2441 .fh = NFS_FH(inode),
2444 .bitmask = server->attr_bitmask,
2447 struct nfs_setattrres res = {
2452 struct rpc_message msg = {
2453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2458 unsigned long timestamp = jiffies;
2463 arg.bitmask = nfs4_bitmask(server, ilabel);
2465 arg.bitmask = nfs4_bitmask(server, olabel);
2467 nfs_fattr_init(fattr);
2469 /* Servers should only apply open mode checks for file size changes */
2470 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2471 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2473 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2474 /* Use that stateid */
2475 } else if (truncate && state != NULL) {
2476 struct nfs_lockowner lockowner = {
2477 .l_owner = current->files,
2478 .l_pid = current->tgid,
2480 if (!nfs4_valid_open_stateid(state))
2482 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2483 &lockowner) == -EIO)
2486 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2488 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2489 if (status == 0 && state != NULL)
2490 renew_lease(server, timestamp);
2494 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2495 struct nfs_fattr *fattr, struct iattr *sattr,
2496 struct nfs4_state *state, struct nfs4_label *ilabel,
2497 struct nfs4_label *olabel)
2499 struct nfs_server *server = NFS_SERVER(inode);
2500 struct nfs4_exception exception = {
2506 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2507 trace_nfs4_setattr(inode, err);
2509 case -NFS4ERR_OPENMODE:
2510 if (!(sattr->ia_valid & ATTR_SIZE)) {
2511 pr_warn_once("NFSv4: server %s is incorrectly "
2512 "applying open mode checks to "
2513 "a SETATTR that is not "
2514 "changing file size.\n",
2515 server->nfs_client->cl_hostname);
2517 if (state && !(state->state & FMODE_WRITE)) {
2519 if (sattr->ia_valid & ATTR_OPEN)
2524 err = nfs4_handle_exception(server, err, &exception);
2525 } while (exception.retry);
2530 struct nfs4_closedata {
2531 struct inode *inode;
2532 struct nfs4_state *state;
2533 struct nfs_closeargs arg;
2534 struct nfs_closeres res;
2535 struct nfs_fattr fattr;
2536 unsigned long timestamp;
2541 static void nfs4_free_closedata(void *data)
2543 struct nfs4_closedata *calldata = data;
2544 struct nfs4_state_owner *sp = calldata->state->owner;
2545 struct super_block *sb = calldata->state->inode->i_sb;
2548 pnfs_roc_release(calldata->state->inode);
2549 nfs4_put_open_state(calldata->state);
2550 nfs_free_seqid(calldata->arg.seqid);
2551 nfs4_put_state_owner(sp);
2552 nfs_sb_deactive(sb);
2556 static void nfs4_close_done(struct rpc_task *task, void *data)
2558 struct nfs4_closedata *calldata = data;
2559 struct nfs4_state *state = calldata->state;
2560 struct nfs_server *server = NFS_SERVER(calldata->inode);
2561 nfs4_stateid *res_stateid = NULL;
2563 dprintk("%s: begin!\n", __func__);
2564 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2566 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2567 /* hmm. we are done with the inode, and in the process of freeing
2568 * the state_owner. we keep this around to process errors
2570 switch (task->tk_status) {
2572 res_stateid = &calldata->res.stateid;
2573 if (calldata->arg.fmode == 0 && calldata->roc)
2574 pnfs_roc_set_barrier(state->inode,
2575 calldata->roc_barrier);
2576 renew_lease(server, calldata->timestamp);
2578 case -NFS4ERR_ADMIN_REVOKED:
2579 case -NFS4ERR_STALE_STATEID:
2580 case -NFS4ERR_OLD_STATEID:
2581 case -NFS4ERR_BAD_STATEID:
2582 case -NFS4ERR_EXPIRED:
2583 if (calldata->arg.fmode == 0)
2586 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
2587 rpc_restart_call_prepare(task);
2591 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2593 nfs_release_seqid(calldata->arg.seqid);
2594 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2595 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2598 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2600 struct nfs4_closedata *calldata = data;
2601 struct nfs4_state *state = calldata->state;
2602 struct inode *inode = calldata->inode;
2603 bool is_rdonly, is_wronly, is_rdwr;
2606 dprintk("%s: begin!\n", __func__);
2607 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2610 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2611 spin_lock(&state->owner->so_lock);
2612 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2613 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2614 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2615 /* Calculate the current open share mode */
2616 calldata->arg.fmode = 0;
2617 if (is_rdonly || is_rdwr)
2618 calldata->arg.fmode |= FMODE_READ;
2619 if (is_wronly || is_rdwr)
2620 calldata->arg.fmode |= FMODE_WRITE;
2621 /* Calculate the change in open mode */
2622 if (state->n_rdwr == 0) {
2623 if (state->n_rdonly == 0) {
2624 call_close |= is_rdonly || is_rdwr;
2625 calldata->arg.fmode &= ~FMODE_READ;
2627 if (state->n_wronly == 0) {
2628 call_close |= is_wronly || is_rdwr;
2629 calldata->arg.fmode &= ~FMODE_WRITE;
2632 if (!nfs4_valid_open_stateid(state))
2634 spin_unlock(&state->owner->so_lock);
2637 /* Note: exit _without_ calling nfs4_close_done */
2641 if (calldata->arg.fmode == 0) {
2642 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2643 if (calldata->roc &&
2644 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2645 nfs_release_seqid(calldata->arg.seqid);
2650 nfs_fattr_init(calldata->res.fattr);
2651 calldata->timestamp = jiffies;
2652 if (nfs4_setup_sequence(NFS_SERVER(inode),
2653 &calldata->arg.seq_args,
2654 &calldata->res.seq_res,
2656 nfs_release_seqid(calldata->arg.seqid);
2657 dprintk("%s: done!\n", __func__);
2660 task->tk_action = NULL;
2662 nfs4_sequence_done(task, &calldata->res.seq_res);
2665 static const struct rpc_call_ops nfs4_close_ops = {
2666 .rpc_call_prepare = nfs4_close_prepare,
2667 .rpc_call_done = nfs4_close_done,
2668 .rpc_release = nfs4_free_closedata,
2671 static bool nfs4_state_has_opener(struct nfs4_state *state)
2673 /* first check existing openers */
2674 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2675 state->n_rdonly != 0)
2678 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2679 state->n_wronly != 0)
2682 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2689 static bool nfs4_roc(struct inode *inode)
2691 struct nfs_inode *nfsi = NFS_I(inode);
2692 struct nfs_open_context *ctx;
2693 struct nfs4_state *state;
2695 spin_lock(&inode->i_lock);
2696 list_for_each_entry(ctx, &nfsi->open_files, list) {
2700 if (nfs4_state_has_opener(state)) {
2701 spin_unlock(&inode->i_lock);
2705 spin_unlock(&inode->i_lock);
2707 if (nfs4_check_delegation(inode, FMODE_READ))
2710 return pnfs_roc(inode);
2714 * It is possible for data to be read/written from a mem-mapped file
2715 * after the sys_close call (which hits the vfs layer as a flush).
2716 * This means that we can't safely call nfsv4 close on a file until
2717 * the inode is cleared. This in turn means that we are not good
2718 * NFSv4 citizens - we do not indicate to the server to update the file's
2719 * share state even when we are done with one of the three share
2720 * stateid's in the inode.
2722 * NOTE: Caller must be holding the sp->so_owner semaphore!
2724 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2726 struct nfs_server *server = NFS_SERVER(state->inode);
2727 struct nfs4_closedata *calldata;
2728 struct nfs4_state_owner *sp = state->owner;
2729 struct rpc_task *task;
2730 struct rpc_message msg = {
2731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2732 .rpc_cred = state->owner->so_cred,
2734 struct rpc_task_setup task_setup_data = {
2735 .rpc_client = server->client,
2736 .rpc_message = &msg,
2737 .callback_ops = &nfs4_close_ops,
2738 .workqueue = nfsiod_workqueue,
2739 .flags = RPC_TASK_ASYNC,
2741 int status = -ENOMEM;
2743 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2744 &task_setup_data.rpc_client, &msg);
2746 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2747 if (calldata == NULL)
2749 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2750 calldata->inode = state->inode;
2751 calldata->state = state;
2752 calldata->arg.fh = NFS_FH(state->inode);
2753 calldata->arg.stateid = &state->open_stateid;
2754 /* Serialization for the sequence id */
2755 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2756 if (calldata->arg.seqid == NULL)
2757 goto out_free_calldata;
2758 calldata->arg.fmode = 0;
2759 calldata->arg.bitmask = server->cache_consistency_bitmask;
2760 calldata->res.fattr = &calldata->fattr;
2761 calldata->res.seqid = calldata->arg.seqid;
2762 calldata->res.server = server;
2763 calldata->roc = nfs4_roc(state->inode);
2764 nfs_sb_active(calldata->inode->i_sb);
2766 msg.rpc_argp = &calldata->arg;
2767 msg.rpc_resp = &calldata->res;
2768 task_setup_data.callback_data = calldata;
2769 task = rpc_run_task(&task_setup_data);
2771 return PTR_ERR(task);
2774 status = rpc_wait_for_completion_task(task);
2780 nfs4_put_open_state(state);
2781 nfs4_put_state_owner(sp);
2785 static struct inode *
2786 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2787 int open_flags, struct iattr *attr, int *opened)
2789 struct nfs4_state *state;
2790 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2792 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2794 /* Protect against concurrent sillydeletes */
2795 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2797 nfs4_label_release_security(label);
2800 return ERR_CAST(state);
2801 return state->inode;
2804 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2806 if (ctx->state == NULL)
2809 nfs4_close_sync(ctx->state, ctx->mode);
2811 nfs4_close_state(ctx->state, ctx->mode);
2814 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2815 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2816 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2818 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2820 struct nfs4_server_caps_arg args = {
2823 struct nfs4_server_caps_res res = {};
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2831 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2833 /* Sanity check the server answers */
2834 switch (server->nfs_client->cl_minorversion) {
2836 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2837 res.attr_bitmask[2] = 0;
2840 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2843 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2845 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2846 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2847 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2848 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2849 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2850 NFS_CAP_CTIME|NFS_CAP_MTIME|
2851 NFS_CAP_SECURITY_LABEL);
2852 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2853 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2854 server->caps |= NFS_CAP_ACLS;
2855 if (res.has_links != 0)
2856 server->caps |= NFS_CAP_HARDLINKS;
2857 if (res.has_symlinks != 0)
2858 server->caps |= NFS_CAP_SYMLINKS;
2859 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2860 server->caps |= NFS_CAP_FILEID;
2861 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2862 server->caps |= NFS_CAP_MODE;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2864 server->caps |= NFS_CAP_NLINK;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2866 server->caps |= NFS_CAP_OWNER;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2868 server->caps |= NFS_CAP_OWNER_GROUP;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2870 server->caps |= NFS_CAP_ATIME;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2872 server->caps |= NFS_CAP_CTIME;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2874 server->caps |= NFS_CAP_MTIME;
2875 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2876 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2877 server->caps |= NFS_CAP_SECURITY_LABEL;
2879 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2880 sizeof(server->attr_bitmask));
2881 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2883 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2884 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2885 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2886 server->cache_consistency_bitmask[2] = 0;
2887 server->acl_bitmask = res.acl_bitmask;
2888 server->fh_expire_type = res.fh_expire_type;
2894 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2896 struct nfs4_exception exception = { };
2899 err = nfs4_handle_exception(server,
2900 _nfs4_server_capabilities(server, fhandle),
2902 } while (exception.retry);
2906 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2907 struct nfs_fsinfo *info)
2910 struct nfs4_lookup_root_arg args = {
2913 struct nfs4_lookup_res res = {
2915 .fattr = info->fattr,
2918 struct rpc_message msg = {
2919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2924 bitmask[0] = nfs4_fattr_bitmap[0];
2925 bitmask[1] = nfs4_fattr_bitmap[1];
2927 * Process the label in the upcoming getfattr
2929 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2931 nfs_fattr_init(info->fattr);
2932 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2935 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2936 struct nfs_fsinfo *info)
2938 struct nfs4_exception exception = { };
2941 err = _nfs4_lookup_root(server, fhandle, info);
2942 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2945 case -NFS4ERR_WRONGSEC:
2948 err = nfs4_handle_exception(server, err, &exception);
2950 } while (exception.retry);
2955 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2958 struct rpc_auth_create_args auth_args = {
2959 .pseudoflavor = flavor,
2961 struct rpc_auth *auth;
2964 auth = rpcauth_create(&auth_args, server->client);
2969 ret = nfs4_lookup_root(server, fhandle, info);
2975 * Retry pseudoroot lookup with various security flavors. We do this when:
2977 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2978 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2980 * Returns zero on success, or a negative NFS4ERR value, or a
2981 * negative errno value.
2983 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2984 struct nfs_fsinfo *info)
2986 /* Per 3530bis 15.33.5 */
2987 static const rpc_authflavor_t flav_array[] = {
2991 RPC_AUTH_UNIX, /* courtesy */
2994 int status = -EPERM;
2997 if (server->auth_info.flavor_len > 0) {
2998 /* try each flavor specified by user */
2999 for (i = 0; i < server->auth_info.flavor_len; i++) {
3000 status = nfs4_lookup_root_sec(server, fhandle, info,
3001 server->auth_info.flavors[i]);
3002 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3007 /* no flavors specified by user, try default list */
3008 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3009 status = nfs4_lookup_root_sec(server, fhandle, info,
3011 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3018 * -EACCESS could mean that the user doesn't have correct permissions
3019 * to access the mount. It could also mean that we tried to mount
3020 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3021 * existing mount programs don't handle -EACCES very well so it should
3022 * be mapped to -EPERM instead.
3024 if (status == -EACCES)
3029 static int nfs4_do_find_root_sec(struct nfs_server *server,
3030 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3032 int mv = server->nfs_client->cl_minorversion;
3033 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3037 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3038 * @server: initialized nfs_server handle
3039 * @fhandle: we fill in the pseudo-fs root file handle
3040 * @info: we fill in an FSINFO struct
3041 * @auth_probe: probe the auth flavours
3043 * Returns zero on success, or a negative errno.
3045 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3046 struct nfs_fsinfo *info,
3051 switch (auth_probe) {
3053 status = nfs4_lookup_root(server, fhandle, info);
3054 if (status != -NFS4ERR_WRONGSEC)
3057 status = nfs4_do_find_root_sec(server, fhandle, info);
3061 status = nfs4_server_capabilities(server, fhandle);
3063 status = nfs4_do_fsinfo(server, fhandle, info);
3065 return nfs4_map_errors(status);
3068 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3069 struct nfs_fsinfo *info)
3072 struct nfs_fattr *fattr = info->fattr;
3073 struct nfs4_label *label = NULL;
3075 error = nfs4_server_capabilities(server, mntfh);
3077 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3081 label = nfs4_label_alloc(server, GFP_KERNEL);
3083 return PTR_ERR(label);
3085 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3087 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3088 goto err_free_label;
3091 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3092 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3093 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3096 nfs4_label_free(label);
3102 * Get locations and (maybe) other attributes of a referral.
3103 * Note that we'll actually follow the referral later when
3104 * we detect fsid mismatch in inode revalidation
3106 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3107 const struct qstr *name, struct nfs_fattr *fattr,
3108 struct nfs_fh *fhandle)
3110 int status = -ENOMEM;
3111 struct page *page = NULL;
3112 struct nfs4_fs_locations *locations = NULL;
3114 page = alloc_page(GFP_KERNEL);
3117 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3118 if (locations == NULL)
3121 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3126 * If the fsid didn't change, this is a migration event, not a
3127 * referral. Cause us to drop into the exception handler, which
3128 * will kick off migration recovery.
3130 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3131 dprintk("%s: server did not return a different fsid for"
3132 " a referral at %s\n", __func__, name->name);
3133 status = -NFS4ERR_MOVED;
3136 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3137 nfs_fixup_referral_attributes(&locations->fattr);
3139 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3140 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3141 memset(fhandle, 0, sizeof(struct nfs_fh));
3149 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3150 struct nfs_fattr *fattr, struct nfs4_label *label)
3152 struct nfs4_getattr_arg args = {
3154 .bitmask = server->attr_bitmask,
3156 struct nfs4_getattr_res res = {
3161 struct rpc_message msg = {
3162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3167 args.bitmask = nfs4_bitmask(server, label);
3169 nfs_fattr_init(fattr);
3170 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3173 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3174 struct nfs_fattr *fattr, struct nfs4_label *label)
3176 struct nfs4_exception exception = { };
3179 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3180 trace_nfs4_getattr(server, fhandle, fattr, err);
3181 err = nfs4_handle_exception(server, err,
3183 } while (exception.retry);
3188 * The file is not closed if it is opened due to the a request to change
3189 * the size of the file. The open call will not be needed once the
3190 * VFS layer lookup-intents are implemented.
3192 * Close is called when the inode is destroyed.
3193 * If we haven't opened the file for O_WRONLY, we
3194 * need to in the size_change case to obtain a stateid.
3197 * Because OPEN is always done by name in nfsv4, it is
3198 * possible that we opened a different file by the same
3199 * name. We can recognize this race condition, but we
3200 * can't do anything about it besides returning an error.
3202 * This will be fixed with VFS changes (lookup-intent).
3205 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3206 struct iattr *sattr)
3208 struct inode *inode = dentry->d_inode;
3209 struct rpc_cred *cred = NULL;
3210 struct nfs4_state *state = NULL;
3211 struct nfs4_label *label = NULL;
3214 if (pnfs_ld_layoutret_on_setattr(inode))
3215 pnfs_commit_and_return_layout(inode);
3217 nfs_fattr_init(fattr);
3219 /* Deal with open(O_TRUNC) */
3220 if (sattr->ia_valid & ATTR_OPEN)
3221 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3223 /* Optimization: if the end result is no change, don't RPC */
3224 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3227 /* Search for an existing open(O_WRITE) file */
3228 if (sattr->ia_valid & ATTR_FILE) {
3229 struct nfs_open_context *ctx;
3231 ctx = nfs_file_open_context(sattr->ia_file);
3238 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3240 return PTR_ERR(label);
3242 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3244 nfs_setattr_update_inode(inode, sattr);
3245 nfs_setsecurity(inode, fattr, label);
3247 nfs4_label_free(label);
3251 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3252 const struct qstr *name, struct nfs_fh *fhandle,
3253 struct nfs_fattr *fattr, struct nfs4_label *label)
3255 struct nfs_server *server = NFS_SERVER(dir);
3257 struct nfs4_lookup_arg args = {
3258 .bitmask = server->attr_bitmask,
3259 .dir_fh = NFS_FH(dir),
3262 struct nfs4_lookup_res res = {
3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3274 args.bitmask = nfs4_bitmask(server, label);
3276 nfs_fattr_init(fattr);
3278 dprintk("NFS call lookup %s\n", name->name);
3279 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3280 dprintk("NFS reply lookup: %d\n", status);
3284 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3286 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3287 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3288 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3292 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3293 struct qstr *name, struct nfs_fh *fhandle,
3294 struct nfs_fattr *fattr, struct nfs4_label *label)
3296 struct nfs4_exception exception = { };
3297 struct rpc_clnt *client = *clnt;
3300 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3301 trace_nfs4_lookup(dir, name, err);
3303 case -NFS4ERR_BADNAME:
3306 case -NFS4ERR_MOVED:
3307 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3309 case -NFS4ERR_WRONGSEC:
3311 if (client != *clnt)
3313 client = nfs4_negotiate_security(client, dir, name);
3315 return PTR_ERR(client);
3317 exception.retry = 1;
3320 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3322 } while (exception.retry);
3327 else if (client != *clnt)
3328 rpc_shutdown_client(client);
3333 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3334 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3335 struct nfs4_label *label)
3338 struct rpc_clnt *client = NFS_CLIENT(dir);
3340 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3341 if (client != NFS_CLIENT(dir)) {
3342 rpc_shutdown_client(client);
3343 nfs_fixup_secinfo_attributes(fattr);
3349 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3350 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3352 struct rpc_clnt *client = NFS_CLIENT(dir);
3355 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3357 return ERR_PTR(status);
3358 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3361 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3363 struct nfs_server *server = NFS_SERVER(inode);
3364 struct nfs4_accessargs args = {
3365 .fh = NFS_FH(inode),
3366 .bitmask = server->cache_consistency_bitmask,
3368 struct nfs4_accessres res = {
3371 struct rpc_message msg = {
3372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3375 .rpc_cred = entry->cred,
3377 int mode = entry->mask;
3381 * Determine which access bits we want to ask for...
3383 if (mode & MAY_READ)
3384 args.access |= NFS4_ACCESS_READ;
3385 if (S_ISDIR(inode->i_mode)) {
3386 if (mode & MAY_WRITE)
3387 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3388 if (mode & MAY_EXEC)
3389 args.access |= NFS4_ACCESS_LOOKUP;
3391 if (mode & MAY_WRITE)
3392 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3393 if (mode & MAY_EXEC)
3394 args.access |= NFS4_ACCESS_EXECUTE;
3397 res.fattr = nfs_alloc_fattr();
3398 if (res.fattr == NULL)
3401 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3403 nfs_access_set_mask(entry, res.access);
3404 nfs_refresh_inode(inode, res.fattr);
3406 nfs_free_fattr(res.fattr);
3410 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3412 struct nfs4_exception exception = { };
3415 err = _nfs4_proc_access(inode, entry);
3416 trace_nfs4_access(inode, err);
3417 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3419 } while (exception.retry);
3424 * TODO: For the time being, we don't try to get any attributes
3425 * along with any of the zero-copy operations READ, READDIR,
3428 * In the case of the first three, we want to put the GETATTR
3429 * after the read-type operation -- this is because it is hard
3430 * to predict the length of a GETATTR response in v4, and thus
3431 * align the READ data correctly. This means that the GETATTR
3432 * may end up partially falling into the page cache, and we should
3433 * shift it into the 'tail' of the xdr_buf before processing.
3434 * To do this efficiently, we need to know the total length
3435 * of data received, which doesn't seem to be available outside
3438 * In the case of WRITE, we also want to put the GETATTR after
3439 * the operation -- in this case because we want to make sure
3440 * we get the post-operation mtime and size.
3442 * Both of these changes to the XDR layer would in fact be quite
3443 * minor, but I decided to leave them for a subsequent patch.
3445 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3446 unsigned int pgbase, unsigned int pglen)
3448 struct nfs4_readlink args = {
3449 .fh = NFS_FH(inode),
3454 struct nfs4_readlink_res res;
3455 struct rpc_message msg = {
3456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3461 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3464 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3465 unsigned int pgbase, unsigned int pglen)
3467 struct nfs4_exception exception = { };
3470 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3471 trace_nfs4_readlink(inode, err);
3472 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3474 } while (exception.retry);
3479 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3482 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3485 struct nfs4_label l, *ilabel = NULL;
3486 struct nfs_open_context *ctx;
3487 struct nfs4_state *state;
3491 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3493 return PTR_ERR(ctx);
3495 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3497 sattr->ia_mode &= ~current_umask();
3498 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3499 if (IS_ERR(state)) {
3500 status = PTR_ERR(state);
3504 nfs4_label_release_security(ilabel);
3505 put_nfs_open_context(ctx);
3509 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3511 struct nfs_server *server = NFS_SERVER(dir);
3512 struct nfs_removeargs args = {
3516 struct nfs_removeres res = {
3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3526 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3528 update_changeattr(dir, &res.cinfo);
3532 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3534 struct nfs4_exception exception = { };
3537 err = _nfs4_proc_remove(dir, name);
3538 trace_nfs4_remove(dir, name, err);
3539 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3541 } while (exception.retry);
3545 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3547 struct nfs_server *server = NFS_SERVER(dir);
3548 struct nfs_removeargs *args = msg->rpc_argp;
3549 struct nfs_removeres *res = msg->rpc_resp;
3551 res->server = server;
3552 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3553 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3555 nfs_fattr_init(res->dir_attr);
3558 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3560 nfs4_setup_sequence(NFS_SERVER(data->dir),
3561 &data->args.seq_args,
3566 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3568 struct nfs_unlinkdata *data = task->tk_calldata;
3569 struct nfs_removeres *res = &data->res;
3571 if (!nfs4_sequence_done(task, &res->seq_res))
3573 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3575 update_changeattr(dir, &res->cinfo);
3579 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3581 struct nfs_server *server = NFS_SERVER(dir);
3582 struct nfs_renameargs *arg = msg->rpc_argp;
3583 struct nfs_renameres *res = msg->rpc_resp;
3585 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3586 res->server = server;
3587 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3590 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3592 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3593 &data->args.seq_args,
3598 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3599 struct inode *new_dir)
3601 struct nfs_renamedata *data = task->tk_calldata;
3602 struct nfs_renameres *res = &data->res;
3604 if (!nfs4_sequence_done(task, &res->seq_res))
3606 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3609 update_changeattr(old_dir, &res->old_cinfo);
3610 update_changeattr(new_dir, &res->new_cinfo);
3614 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3616 struct nfs_server *server = NFS_SERVER(inode);
3617 struct nfs4_link_arg arg = {
3618 .fh = NFS_FH(inode),
3619 .dir_fh = NFS_FH(dir),
3621 .bitmask = server->attr_bitmask,
3623 struct nfs4_link_res res = {
3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3632 int status = -ENOMEM;
3634 res.fattr = nfs_alloc_fattr();
3635 if (res.fattr == NULL)
3638 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3639 if (IS_ERR(res.label)) {
3640 status = PTR_ERR(res.label);
3643 arg.bitmask = nfs4_bitmask(server, res.label);
3645 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3647 update_changeattr(dir, &res.cinfo);
3648 status = nfs_post_op_update_inode(inode, res.fattr);
3650 nfs_setsecurity(inode, res.fattr, res.label);
3654 nfs4_label_free(res.label);
3657 nfs_free_fattr(res.fattr);
3661 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3663 struct nfs4_exception exception = { };
3666 err = nfs4_handle_exception(NFS_SERVER(inode),
3667 _nfs4_proc_link(inode, dir, name),
3669 } while (exception.retry);
3673 struct nfs4_createdata {
3674 struct rpc_message msg;
3675 struct nfs4_create_arg arg;
3676 struct nfs4_create_res res;
3678 struct nfs_fattr fattr;
3679 struct nfs4_label *label;
3682 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3683 struct qstr *name, struct iattr *sattr, u32 ftype)
3685 struct nfs4_createdata *data;
3687 data = kzalloc(sizeof(*data), GFP_KERNEL);
3689 struct nfs_server *server = NFS_SERVER(dir);
3691 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3692 if (IS_ERR(data->label))
3695 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3696 data->msg.rpc_argp = &data->arg;
3697 data->msg.rpc_resp = &data->res;
3698 data->arg.dir_fh = NFS_FH(dir);
3699 data->arg.server = server;
3700 data->arg.name = name;
3701 data->arg.attrs = sattr;
3702 data->arg.ftype = ftype;
3703 data->arg.bitmask = nfs4_bitmask(server, data->label);
3704 data->res.server = server;
3705 data->res.fh = &data->fh;
3706 data->res.fattr = &data->fattr;
3707 data->res.label = data->label;
3708 nfs_fattr_init(data->res.fattr);
3716 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3718 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3719 &data->arg.seq_args, &data->res.seq_res, 1);
3721 update_changeattr(dir, &data->res.dir_cinfo);
3722 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3727 static void nfs4_free_createdata(struct nfs4_createdata *data)
3729 nfs4_label_free(data->label);
3733 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3734 struct page *page, unsigned int len, struct iattr *sattr,
3735 struct nfs4_label *label)
3737 struct nfs4_createdata *data;
3738 int status = -ENAMETOOLONG;
3740 if (len > NFS4_MAXPATHLEN)
3744 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3748 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3749 data->arg.u.symlink.pages = &page;
3750 data->arg.u.symlink.len = len;
3751 data->arg.label = label;
3753 status = nfs4_do_create(dir, dentry, data);
3755 nfs4_free_createdata(data);
3760 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3761 struct page *page, unsigned int len, struct iattr *sattr)
3763 struct nfs4_exception exception = { };
3764 struct nfs4_label l, *label = NULL;
3767 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3770 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3771 trace_nfs4_symlink(dir, &dentry->d_name, err);
3772 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3774 } while (exception.retry);
3776 nfs4_label_release_security(label);
3780 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3781 struct iattr *sattr, struct nfs4_label *label)
3783 struct nfs4_createdata *data;
3784 int status = -ENOMEM;
3786 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3790 data->arg.label = label;
3791 status = nfs4_do_create(dir, dentry, data);
3793 nfs4_free_createdata(data);
3798 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3799 struct iattr *sattr)
3801 struct nfs4_exception exception = { };
3802 struct nfs4_label l, *label = NULL;
3805 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3807 sattr->ia_mode &= ~current_umask();
3809 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3810 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3811 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3813 } while (exception.retry);
3814 nfs4_label_release_security(label);
3819 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3820 u64 cookie, struct page **pages, unsigned int count, int plus)
3822 struct inode *dir = dentry->d_inode;
3823 struct nfs4_readdir_arg args = {
3828 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3831 struct nfs4_readdir_res res;
3832 struct rpc_message msg = {
3833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3840 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3842 (unsigned long long)cookie);
3843 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3844 res.pgbase = args.pgbase;
3845 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3847 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3848 status += args.pgbase;
3851 nfs_invalidate_atime(dir);
3853 dprintk("%s: returns %d\n", __func__, status);
3857 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3858 u64 cookie, struct page **pages, unsigned int count, int plus)
3860 struct nfs4_exception exception = { };
3863 err = _nfs4_proc_readdir(dentry, cred, cookie,
3864 pages, count, plus);
3865 trace_nfs4_readdir(dentry->d_inode, err);
3866 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
3868 } while (exception.retry);
3872 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3873 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3875 struct nfs4_createdata *data;
3876 int mode = sattr->ia_mode;
3877 int status = -ENOMEM;
3879 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3884 data->arg.ftype = NF4FIFO;
3885 else if (S_ISBLK(mode)) {
3886 data->arg.ftype = NF4BLK;
3887 data->arg.u.device.specdata1 = MAJOR(rdev);
3888 data->arg.u.device.specdata2 = MINOR(rdev);
3890 else if (S_ISCHR(mode)) {
3891 data->arg.ftype = NF4CHR;
3892 data->arg.u.device.specdata1 = MAJOR(rdev);
3893 data->arg.u.device.specdata2 = MINOR(rdev);
3894 } else if (!S_ISSOCK(mode)) {
3899 data->arg.label = label;
3900 status = nfs4_do_create(dir, dentry, data);
3902 nfs4_free_createdata(data);
3907 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3908 struct iattr *sattr, dev_t rdev)
3910 struct nfs4_exception exception = { };
3911 struct nfs4_label l, *label = NULL;
3914 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3916 sattr->ia_mode &= ~current_umask();
3918 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3919 trace_nfs4_mknod(dir, &dentry->d_name, err);
3920 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3922 } while (exception.retry);
3924 nfs4_label_release_security(label);
3929 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3930 struct nfs_fsstat *fsstat)
3932 struct nfs4_statfs_arg args = {
3934 .bitmask = server->attr_bitmask,
3936 struct nfs4_statfs_res res = {
3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3945 nfs_fattr_init(fsstat->fattr);
3946 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3949 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3951 struct nfs4_exception exception = { };
3954 err = nfs4_handle_exception(server,
3955 _nfs4_proc_statfs(server, fhandle, fsstat),
3957 } while (exception.retry);
3961 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3962 struct nfs_fsinfo *fsinfo)
3964 struct nfs4_fsinfo_arg args = {
3966 .bitmask = server->attr_bitmask,
3968 struct nfs4_fsinfo_res res = {
3971 struct rpc_message msg = {
3972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3977 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3980 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3982 struct nfs4_exception exception = { };
3983 unsigned long now = jiffies;
3987 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3988 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
3990 struct nfs_client *clp = server->nfs_client;
3992 spin_lock(&clp->cl_lock);
3993 clp->cl_lease_time = fsinfo->lease_time * HZ;
3994 clp->cl_last_renewal = now;
3995 spin_unlock(&clp->cl_lock);
3998 err = nfs4_handle_exception(server, err, &exception);
3999 } while (exception.retry);
4003 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4007 nfs_fattr_init(fsinfo->fattr);
4008 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4010 /* block layout checks this! */
4011 server->pnfs_blksize = fsinfo->blksize;
4012 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4018 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4019 struct nfs_pathconf *pathconf)
4021 struct nfs4_pathconf_arg args = {
4023 .bitmask = server->attr_bitmask,
4025 struct nfs4_pathconf_res res = {
4026 .pathconf = pathconf,
4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4034 /* None of the pathconf attributes are mandatory to implement */
4035 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4036 memset(pathconf, 0, sizeof(*pathconf));
4040 nfs_fattr_init(pathconf->fattr);
4041 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4044 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4045 struct nfs_pathconf *pathconf)
4047 struct nfs4_exception exception = { };
4051 err = nfs4_handle_exception(server,
4052 _nfs4_proc_pathconf(server, fhandle, pathconf),
4054 } while (exception.retry);
4058 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4059 const struct nfs_open_context *ctx,
4060 const struct nfs_lock_context *l_ctx,
4063 const struct nfs_lockowner *lockowner = NULL;
4066 lockowner = &l_ctx->lockowner;
4067 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4069 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4071 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4072 const struct nfs_open_context *ctx,
4073 const struct nfs_lock_context *l_ctx,
4076 nfs4_stateid current_stateid;
4078 /* If the current stateid represents a lost lock, then exit */
4079 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4081 return nfs4_stateid_match(stateid, ¤t_stateid);
4084 static bool nfs4_error_stateid_expired(int err)
4087 case -NFS4ERR_DELEG_REVOKED:
4088 case -NFS4ERR_ADMIN_REVOKED:
4089 case -NFS4ERR_BAD_STATEID:
4090 case -NFS4ERR_STALE_STATEID:
4091 case -NFS4ERR_OLD_STATEID:
4092 case -NFS4ERR_OPENMODE:
4093 case -NFS4ERR_EXPIRED:
4099 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4101 nfs_invalidate_atime(hdr->inode);
4104 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4106 struct nfs_server *server = NFS_SERVER(hdr->inode);
4108 trace_nfs4_read(hdr, task->tk_status);
4109 if (nfs4_async_handle_error(task, server,
4110 hdr->args.context->state) == -EAGAIN) {
4111 rpc_restart_call_prepare(task);
4115 __nfs4_read_done_cb(hdr);
4116 if (task->tk_status > 0)
4117 renew_lease(server, hdr->timestamp);
4121 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4122 struct nfs_pgio_args *args)
4125 if (!nfs4_error_stateid_expired(task->tk_status) ||
4126 nfs4_stateid_is_current(&args->stateid,
4131 rpc_restart_call_prepare(task);
4135 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4138 dprintk("--> %s\n", __func__);
4140 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4142 if (nfs4_read_stateid_changed(task, &hdr->args))
4144 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4145 nfs4_read_done_cb(task, hdr);
4148 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4149 struct rpc_message *msg)
4151 hdr->timestamp = jiffies;
4152 hdr->pgio_done_cb = nfs4_read_done_cb;
4153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4154 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4157 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4158 struct nfs_pgio_header *hdr)
4160 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4161 &hdr->args.seq_args,
4165 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4166 hdr->args.lock_context,
4167 hdr->rw_ops->rw_mode) == -EIO)
4169 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4174 static int nfs4_write_done_cb(struct rpc_task *task,
4175 struct nfs_pgio_header *hdr)
4177 struct inode *inode = hdr->inode;
4179 trace_nfs4_write(hdr, task->tk_status);
4180 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4181 hdr->args.context->state) == -EAGAIN) {
4182 rpc_restart_call_prepare(task);
4185 if (task->tk_status >= 0) {
4186 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4187 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4192 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4193 struct nfs_pgio_args *args)
4196 if (!nfs4_error_stateid_expired(task->tk_status) ||
4197 nfs4_stateid_is_current(&args->stateid,
4202 rpc_restart_call_prepare(task);
4206 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4208 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4210 if (nfs4_write_stateid_changed(task, &hdr->args))
4212 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4213 nfs4_write_done_cb(task, hdr);
4217 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4219 /* Don't request attributes for pNFS or O_DIRECT writes */
4220 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4222 /* Otherwise, request attributes if and only if we don't hold
4225 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4228 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4229 struct rpc_message *msg)
4231 struct nfs_server *server = NFS_SERVER(hdr->inode);
4233 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4234 hdr->args.bitmask = NULL;
4235 hdr->res.fattr = NULL;
4237 hdr->args.bitmask = server->cache_consistency_bitmask;
4239 if (!hdr->pgio_done_cb)
4240 hdr->pgio_done_cb = nfs4_write_done_cb;
4241 hdr->res.server = server;
4242 hdr->timestamp = jiffies;
4244 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4245 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4248 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4250 nfs4_setup_sequence(NFS_SERVER(data->inode),
4251 &data->args.seq_args,
4256 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4258 struct inode *inode = data->inode;
4260 trace_nfs4_commit(data, task->tk_status);
4261 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
4262 rpc_restart_call_prepare(task);
4268 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4270 if (!nfs4_sequence_done(task, &data->res.seq_res))
4272 return data->commit_done_cb(task, data);
4275 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4277 struct nfs_server *server = NFS_SERVER(data->inode);
4279 if (data->commit_done_cb == NULL)
4280 data->commit_done_cb = nfs4_commit_done_cb;
4281 data->res.server = server;
4282 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4283 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4286 struct nfs4_renewdata {
4287 struct nfs_client *client;
4288 unsigned long timestamp;
4292 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4293 * standalone procedure for queueing an asynchronous RENEW.
4295 static void nfs4_renew_release(void *calldata)
4297 struct nfs4_renewdata *data = calldata;
4298 struct nfs_client *clp = data->client;
4300 if (atomic_read(&clp->cl_count) > 1)
4301 nfs4_schedule_state_renewal(clp);
4302 nfs_put_client(clp);
4306 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4308 struct nfs4_renewdata *data = calldata;
4309 struct nfs_client *clp = data->client;
4310 unsigned long timestamp = data->timestamp;
4312 trace_nfs4_renew_async(clp, task->tk_status);
4313 switch (task->tk_status) {
4316 case -NFS4ERR_LEASE_MOVED:
4317 nfs4_schedule_lease_moved_recovery(clp);
4320 /* Unless we're shutting down, schedule state recovery! */
4321 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4323 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4324 nfs4_schedule_lease_recovery(clp);
4327 nfs4_schedule_path_down_recovery(clp);
4329 do_renew_lease(clp, timestamp);
4332 static const struct rpc_call_ops nfs4_renew_ops = {
4333 .rpc_call_done = nfs4_renew_done,
4334 .rpc_release = nfs4_renew_release,
4337 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4339 struct rpc_message msg = {
4340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4344 struct nfs4_renewdata *data;
4346 if (renew_flags == 0)
4348 if (!atomic_inc_not_zero(&clp->cl_count))
4350 data = kmalloc(sizeof(*data), GFP_NOFS);
4354 data->timestamp = jiffies;
4355 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4356 &nfs4_renew_ops, data);
4359 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4366 unsigned long now = jiffies;
4369 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4372 do_renew_lease(clp, now);
4376 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4378 return server->caps & NFS_CAP_ACLS;
4381 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4382 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4385 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4387 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4388 struct page **pages, unsigned int *pgbase)
4390 struct page *newpage, **spages;
4396 len = min_t(size_t, PAGE_SIZE, buflen);
4397 newpage = alloc_page(GFP_KERNEL);
4399 if (newpage == NULL)
4401 memcpy(page_address(newpage), buf, len);
4406 } while (buflen != 0);
4412 __free_page(spages[rc-1]);
4416 struct nfs4_cached_acl {
4422 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4424 struct nfs_inode *nfsi = NFS_I(inode);
4426 spin_lock(&inode->i_lock);
4427 kfree(nfsi->nfs4_acl);
4428 nfsi->nfs4_acl = acl;
4429 spin_unlock(&inode->i_lock);
4432 static void nfs4_zap_acl_attr(struct inode *inode)
4434 nfs4_set_cached_acl(inode, NULL);
4437 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4439 struct nfs_inode *nfsi = NFS_I(inode);
4440 struct nfs4_cached_acl *acl;
4443 spin_lock(&inode->i_lock);
4444 acl = nfsi->nfs4_acl;
4447 if (buf == NULL) /* user is just asking for length */
4449 if (acl->cached == 0)
4451 ret = -ERANGE; /* see getxattr(2) man page */
4452 if (acl->len > buflen)
4454 memcpy(buf, acl->data, acl->len);
4458 spin_unlock(&inode->i_lock);
4462 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4464 struct nfs4_cached_acl *acl;
4465 size_t buflen = sizeof(*acl) + acl_len;
4467 if (buflen <= PAGE_SIZE) {
4468 acl = kmalloc(buflen, GFP_KERNEL);
4472 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4474 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4481 nfs4_set_cached_acl(inode, acl);
4485 * The getxattr API returns the required buffer length when called with a
4486 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4487 * the required buf. On a NULL buf, we send a page of data to the server
4488 * guessing that the ACL request can be serviced by a page. If so, we cache
4489 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4490 * the cache. If not so, we throw away the page, and cache the required
4491 * length. The next getxattr call will then produce another round trip to
4492 * the server, this time with the input buf of the required size.
4494 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4496 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4497 struct nfs_getaclargs args = {
4498 .fh = NFS_FH(inode),
4502 struct nfs_getaclres res = {
4505 struct rpc_message msg = {
4506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4510 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4511 int ret = -ENOMEM, i;
4513 /* As long as we're doing a round trip to the server anyway,
4514 * let's be prepared for a page of acl data. */
4517 if (npages > ARRAY_SIZE(pages))
4520 for (i = 0; i < npages; i++) {
4521 pages[i] = alloc_page(GFP_KERNEL);
4526 /* for decoding across pages */
4527 res.acl_scratch = alloc_page(GFP_KERNEL);
4528 if (!res.acl_scratch)
4531 args.acl_len = npages * PAGE_SIZE;
4532 args.acl_pgbase = 0;
4534 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4535 __func__, buf, buflen, npages, args.acl_len);
4536 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4537 &msg, &args.seq_args, &res.seq_res, 0);
4541 /* Handle the case where the passed-in buffer is too short */
4542 if (res.acl_flags & NFS4_ACL_TRUNC) {
4543 /* Did the user only issue a request for the acl length? */
4549 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4551 if (res.acl_len > buflen) {
4555 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4560 for (i = 0; i < npages; i++)
4562 __free_page(pages[i]);
4563 if (res.acl_scratch)
4564 __free_page(res.acl_scratch);
4568 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4570 struct nfs4_exception exception = { };
4573 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4574 trace_nfs4_get_acl(inode, ret);
4577 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4578 } while (exception.retry);
4582 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4584 struct nfs_server *server = NFS_SERVER(inode);
4587 if (!nfs4_server_supports_acls(server))
4589 ret = nfs_revalidate_inode(server, inode);
4592 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4593 nfs_zap_acl_cache(inode);
4594 ret = nfs4_read_cached_acl(inode, buf, buflen);
4596 /* -ENOENT is returned if there is no ACL or if there is an ACL
4597 * but no cached acl data, just the acl length */
4599 return nfs4_get_acl_uncached(inode, buf, buflen);
4602 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4604 struct nfs_server *server = NFS_SERVER(inode);
4605 struct page *pages[NFS4ACL_MAXPAGES];
4606 struct nfs_setaclargs arg = {
4607 .fh = NFS_FH(inode),
4611 struct nfs_setaclres res;
4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4617 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4620 if (!nfs4_server_supports_acls(server))
4622 if (npages > ARRAY_SIZE(pages))
4624 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4627 nfs4_inode_return_delegation(inode);
4628 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4631 * Free each page after tx, so the only ref left is
4632 * held by the network stack
4635 put_page(pages[i-1]);
4638 * Acl update can result in inode attribute update.
4639 * so mark the attribute cache invalid.
4641 spin_lock(&inode->i_lock);
4642 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4643 spin_unlock(&inode->i_lock);
4644 nfs_access_zap_cache(inode);
4645 nfs_zap_acl_cache(inode);
4649 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4651 struct nfs4_exception exception = { };
4654 err = __nfs4_proc_set_acl(inode, buf, buflen);
4655 trace_nfs4_set_acl(inode, err);
4656 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4658 } while (exception.retry);
4662 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4663 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4666 struct nfs_server *server = NFS_SERVER(inode);
4667 struct nfs_fattr fattr;
4668 struct nfs4_label label = {0, 0, buflen, buf};
4670 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4671 struct nfs4_getattr_arg arg = {
4672 .fh = NFS_FH(inode),
4675 struct nfs4_getattr_res res = {
4680 struct rpc_message msg = {
4681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4687 nfs_fattr_init(&fattr);
4689 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4692 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4694 if (buflen < label.len)
4699 static int nfs4_get_security_label(struct inode *inode, void *buf,
4702 struct nfs4_exception exception = { };
4705 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4709 err = _nfs4_get_security_label(inode, buf, buflen);
4710 trace_nfs4_get_security_label(inode, err);
4711 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4713 } while (exception.retry);
4717 static int _nfs4_do_set_security_label(struct inode *inode,
4718 struct nfs4_label *ilabel,
4719 struct nfs_fattr *fattr,
4720 struct nfs4_label *olabel)
4723 struct iattr sattr = {0};
4724 struct nfs_server *server = NFS_SERVER(inode);
4725 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4726 struct nfs_setattrargs arg = {
4727 .fh = NFS_FH(inode),
4733 struct nfs_setattrres res = {
4738 struct rpc_message msg = {
4739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4745 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4747 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4749 dprintk("%s failed: %d\n", __func__, status);
4754 static int nfs4_do_set_security_label(struct inode *inode,
4755 struct nfs4_label *ilabel,
4756 struct nfs_fattr *fattr,
4757 struct nfs4_label *olabel)
4759 struct nfs4_exception exception = { };
4763 err = _nfs4_do_set_security_label(inode, ilabel,
4765 trace_nfs4_set_security_label(inode, err);
4766 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4768 } while (exception.retry);
4773 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4775 struct nfs4_label ilabel, *olabel = NULL;
4776 struct nfs_fattr fattr;
4777 struct rpc_cred *cred;
4778 struct inode *inode = dentry->d_inode;
4781 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4784 nfs_fattr_init(&fattr);
4788 ilabel.label = (char *)buf;
4789 ilabel.len = buflen;
4791 cred = rpc_lookup_cred();
4793 return PTR_ERR(cred);
4795 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4796 if (IS_ERR(olabel)) {
4797 status = -PTR_ERR(olabel);
4801 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4803 nfs_setsecurity(inode, &fattr, olabel);
4805 nfs4_label_free(olabel);
4810 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4814 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4816 struct nfs_client *clp = server->nfs_client;
4818 if (task->tk_status >= 0)
4820 switch(task->tk_status) {
4821 case -NFS4ERR_DELEG_REVOKED:
4822 case -NFS4ERR_ADMIN_REVOKED:
4823 case -NFS4ERR_BAD_STATEID:
4826 nfs_remove_bad_delegation(state->inode);
4827 case -NFS4ERR_OPENMODE:
4830 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4831 goto recovery_failed;
4832 goto wait_on_recovery;
4833 case -NFS4ERR_EXPIRED:
4834 if (state != NULL) {
4835 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4836 goto recovery_failed;
4838 case -NFS4ERR_STALE_STATEID:
4839 case -NFS4ERR_STALE_CLIENTID:
4840 nfs4_schedule_lease_recovery(clp);
4841 goto wait_on_recovery;
4842 case -NFS4ERR_MOVED:
4843 if (nfs4_schedule_migration_recovery(server) < 0)
4844 goto recovery_failed;
4845 goto wait_on_recovery;
4846 case -NFS4ERR_LEASE_MOVED:
4847 nfs4_schedule_lease_moved_recovery(clp);
4848 goto wait_on_recovery;
4849 #if defined(CONFIG_NFS_V4_1)
4850 case -NFS4ERR_BADSESSION:
4851 case -NFS4ERR_BADSLOT:
4852 case -NFS4ERR_BAD_HIGH_SLOT:
4853 case -NFS4ERR_DEADSESSION:
4854 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4855 case -NFS4ERR_SEQ_FALSE_RETRY:
4856 case -NFS4ERR_SEQ_MISORDERED:
4857 dprintk("%s ERROR %d, Reset session\n", __func__,
4859 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4860 goto wait_on_recovery;
4861 #endif /* CONFIG_NFS_V4_1 */
4862 case -NFS4ERR_DELAY:
4863 nfs_inc_server_stats(server, NFSIOS_DELAY);
4864 case -NFS4ERR_GRACE:
4865 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4866 case -NFS4ERR_RETRY_UNCACHED_REP:
4867 case -NFS4ERR_OLD_STATEID:
4870 task->tk_status = nfs4_map_errors(task->tk_status);
4873 task->tk_status = -EIO;
4876 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4877 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4878 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4879 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4880 goto recovery_failed;
4882 task->tk_status = 0;
4886 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4887 nfs4_verifier *bootverf)
4891 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4892 /* An impossible timestamp guarantees this value
4893 * will never match a generated boot time. */
4895 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4897 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4898 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4899 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4901 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4905 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4906 char *buf, size_t len)
4908 unsigned int result;
4911 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4913 rpc_peeraddr2str(clp->cl_rpcclient,
4915 rpc_peeraddr2str(clp->cl_rpcclient,
4916 RPC_DISPLAY_PROTO));
4922 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4923 char *buf, size_t len)
4925 const char *nodename = clp->cl_rpcclient->cl_nodename;
4927 if (nfs4_client_id_uniquifier[0] != '\0')
4928 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4929 clp->rpc_ops->version,
4930 clp->cl_minorversion,
4931 nfs4_client_id_uniquifier,
4933 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4934 clp->rpc_ops->version, clp->cl_minorversion,
4939 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4940 * services. Advertise one based on the address family of the
4944 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4946 if (strchr(clp->cl_ipaddr, ':') != NULL)
4947 return scnprintf(buf, len, "tcp6");
4949 return scnprintf(buf, len, "tcp");
4952 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4954 struct nfs4_setclientid *sc = calldata;
4956 if (task->tk_status == 0)
4957 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4960 static const struct rpc_call_ops nfs4_setclientid_ops = {
4961 .rpc_call_done = nfs4_setclientid_done,
4965 * nfs4_proc_setclientid - Negotiate client ID
4966 * @clp: state data structure
4967 * @program: RPC program for NFSv4 callback service
4968 * @port: IP port number for NFS4 callback service
4969 * @cred: RPC credential to use for this call
4970 * @res: where to place the result
4972 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4974 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4975 unsigned short port, struct rpc_cred *cred,
4976 struct nfs4_setclientid_res *res)
4978 nfs4_verifier sc_verifier;
4979 struct nfs4_setclientid setclientid = {
4980 .sc_verifier = &sc_verifier,
4982 .sc_cb_ident = clp->cl_cb_ident,
4984 struct rpc_message msg = {
4985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4986 .rpc_argp = &setclientid,
4990 struct rpc_task *task;
4991 struct rpc_task_setup task_setup_data = {
4992 .rpc_client = clp->cl_rpcclient,
4993 .rpc_message = &msg,
4994 .callback_ops = &nfs4_setclientid_ops,
4995 .callback_data = &setclientid,
4996 .flags = RPC_TASK_TIMEOUT,
5000 /* nfs_client_id4 */
5001 nfs4_init_boot_verifier(clp, &sc_verifier);
5002 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5003 setclientid.sc_name_len =
5004 nfs4_init_uniform_client_string(clp,
5005 setclientid.sc_name,
5006 sizeof(setclientid.sc_name));
5008 setclientid.sc_name_len =
5009 nfs4_init_nonuniform_client_string(clp,
5010 setclientid.sc_name,
5011 sizeof(setclientid.sc_name));
5013 setclientid.sc_netid_len =
5014 nfs4_init_callback_netid(clp,
5015 setclientid.sc_netid,
5016 sizeof(setclientid.sc_netid));
5017 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5018 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5019 clp->cl_ipaddr, port >> 8, port & 255);
5021 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5022 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5023 setclientid.sc_name_len, setclientid.sc_name);
5024 task = rpc_run_task(&task_setup_data);
5026 status = PTR_ERR(task);
5029 status = task->tk_status;
5030 if (setclientid.sc_cred) {
5031 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5032 put_rpccred(setclientid.sc_cred);
5036 trace_nfs4_setclientid(clp, status);
5037 dprintk("NFS reply setclientid: %d\n", status);
5042 * nfs4_proc_setclientid_confirm - Confirm client ID
5043 * @clp: state data structure
5044 * @res: result of a previous SETCLIENTID
5045 * @cred: RPC credential to use for this call
5047 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5049 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5050 struct nfs4_setclientid_res *arg,
5051 struct rpc_cred *cred)
5053 struct rpc_message msg = {
5054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5060 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5061 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5063 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5064 trace_nfs4_setclientid_confirm(clp, status);
5065 dprintk("NFS reply setclientid_confirm: %d\n", status);
5069 struct nfs4_delegreturndata {
5070 struct nfs4_delegreturnargs args;
5071 struct nfs4_delegreturnres res;
5073 nfs4_stateid stateid;
5074 unsigned long timestamp;
5075 struct nfs_fattr fattr;
5077 struct inode *inode;
5082 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5084 struct nfs4_delegreturndata *data = calldata;
5086 if (!nfs4_sequence_done(task, &data->res.seq_res))
5089 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5090 switch (task->tk_status) {
5092 renew_lease(data->res.server, data->timestamp);
5093 case -NFS4ERR_ADMIN_REVOKED:
5094 case -NFS4ERR_DELEG_REVOKED:
5095 case -NFS4ERR_BAD_STATEID:
5096 case -NFS4ERR_OLD_STATEID:
5097 case -NFS4ERR_STALE_STATEID:
5098 case -NFS4ERR_EXPIRED:
5099 task->tk_status = 0;
5101 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5104 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5106 rpc_restart_call_prepare(task);
5110 data->rpc_status = task->tk_status;
5113 static void nfs4_delegreturn_release(void *calldata)
5115 struct nfs4_delegreturndata *data = calldata;
5118 pnfs_roc_release(data->inode);
5122 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5124 struct nfs4_delegreturndata *d_data;
5126 d_data = (struct nfs4_delegreturndata *)data;
5129 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5132 nfs4_setup_sequence(d_data->res.server,
5133 &d_data->args.seq_args,
5134 &d_data->res.seq_res,
5138 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5139 .rpc_call_prepare = nfs4_delegreturn_prepare,
5140 .rpc_call_done = nfs4_delegreturn_done,
5141 .rpc_release = nfs4_delegreturn_release,
5144 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5146 struct nfs4_delegreturndata *data;
5147 struct nfs_server *server = NFS_SERVER(inode);
5148 struct rpc_task *task;
5149 struct rpc_message msg = {
5150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5153 struct rpc_task_setup task_setup_data = {
5154 .rpc_client = server->client,
5155 .rpc_message = &msg,
5156 .callback_ops = &nfs4_delegreturn_ops,
5157 .flags = RPC_TASK_ASYNC,
5161 data = kzalloc(sizeof(*data), GFP_NOFS);
5164 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5165 data->args.fhandle = &data->fh;
5166 data->args.stateid = &data->stateid;
5167 data->args.bitmask = server->cache_consistency_bitmask;
5168 nfs_copy_fh(&data->fh, NFS_FH(inode));
5169 nfs4_stateid_copy(&data->stateid, stateid);
5170 data->res.fattr = &data->fattr;
5171 data->res.server = server;
5172 nfs_fattr_init(data->res.fattr);
5173 data->timestamp = jiffies;
5174 data->rpc_status = 0;
5175 data->inode = inode;
5176 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5177 pnfs_roc(inode) : false;
5179 task_setup_data.callback_data = data;
5180 msg.rpc_argp = &data->args;
5181 msg.rpc_resp = &data->res;
5182 task = rpc_run_task(&task_setup_data);
5184 return PTR_ERR(task);
5187 status = nfs4_wait_for_completion_rpc_task(task);
5190 status = data->rpc_status;
5192 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5194 nfs_refresh_inode(inode, &data->fattr);
5200 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5202 struct nfs_server *server = NFS_SERVER(inode);
5203 struct nfs4_exception exception = { };
5206 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5207 trace_nfs4_delegreturn(inode, err);
5209 case -NFS4ERR_STALE_STATEID:
5210 case -NFS4ERR_EXPIRED:
5214 err = nfs4_handle_exception(server, err, &exception);
5215 } while (exception.retry);
5219 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5220 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5223 * sleep, with exponential backoff, and retry the LOCK operation.
5225 static unsigned long
5226 nfs4_set_lock_task_retry(unsigned long timeout)
5228 freezable_schedule_timeout_killable_unsafe(timeout);
5230 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5231 return NFS4_LOCK_MAXTIMEOUT;
5235 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5237 struct inode *inode = state->inode;
5238 struct nfs_server *server = NFS_SERVER(inode);
5239 struct nfs_client *clp = server->nfs_client;
5240 struct nfs_lockt_args arg = {
5241 .fh = NFS_FH(inode),
5244 struct nfs_lockt_res res = {
5247 struct rpc_message msg = {
5248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5251 .rpc_cred = state->owner->so_cred,
5253 struct nfs4_lock_state *lsp;
5256 arg.lock_owner.clientid = clp->cl_clientid;
5257 status = nfs4_set_lock_state(state, request);
5260 lsp = request->fl_u.nfs4_fl.owner;
5261 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5262 arg.lock_owner.s_dev = server->s_dev;
5263 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5266 request->fl_type = F_UNLCK;
5268 case -NFS4ERR_DENIED:
5271 request->fl_ops->fl_release_private(request);
5272 request->fl_ops = NULL;
5277 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5279 struct nfs4_exception exception = { };
5283 err = _nfs4_proc_getlk(state, cmd, request);
5284 trace_nfs4_get_lock(request, state, cmd, err);
5285 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5287 } while (exception.retry);
5291 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5294 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5296 res = posix_lock_file_wait(file, fl);
5299 res = flock_lock_file_wait(file, fl);
5307 struct nfs4_unlockdata {
5308 struct nfs_locku_args arg;
5309 struct nfs_locku_res res;
5310 struct nfs4_lock_state *lsp;
5311 struct nfs_open_context *ctx;
5312 struct file_lock fl;
5313 const struct nfs_server *server;
5314 unsigned long timestamp;
5317 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5318 struct nfs_open_context *ctx,
5319 struct nfs4_lock_state *lsp,
5320 struct nfs_seqid *seqid)
5322 struct nfs4_unlockdata *p;
5323 struct inode *inode = lsp->ls_state->inode;
5325 p = kzalloc(sizeof(*p), GFP_NOFS);
5328 p->arg.fh = NFS_FH(inode);
5330 p->arg.seqid = seqid;
5331 p->res.seqid = seqid;
5332 p->arg.stateid = &lsp->ls_stateid;
5334 atomic_inc(&lsp->ls_count);
5335 /* Ensure we don't close file until we're done freeing locks! */
5336 p->ctx = get_nfs_open_context(ctx);
5337 memcpy(&p->fl, fl, sizeof(p->fl));
5338 p->server = NFS_SERVER(inode);
5342 static void nfs4_locku_release_calldata(void *data)
5344 struct nfs4_unlockdata *calldata = data;
5345 nfs_free_seqid(calldata->arg.seqid);
5346 nfs4_put_lock_state(calldata->lsp);
5347 put_nfs_open_context(calldata->ctx);
5351 static void nfs4_locku_done(struct rpc_task *task, void *data)
5353 struct nfs4_unlockdata *calldata = data;
5355 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5357 switch (task->tk_status) {
5359 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5360 &calldata->res.stateid);
5361 renew_lease(calldata->server, calldata->timestamp);
5363 case -NFS4ERR_BAD_STATEID:
5364 case -NFS4ERR_OLD_STATEID:
5365 case -NFS4ERR_STALE_STATEID:
5366 case -NFS4ERR_EXPIRED:
5369 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
5370 rpc_restart_call_prepare(task);
5372 nfs_release_seqid(calldata->arg.seqid);
5375 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5377 struct nfs4_unlockdata *calldata = data;
5379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5381 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5382 /* Note: exit _without_ running nfs4_locku_done */
5385 calldata->timestamp = jiffies;
5386 if (nfs4_setup_sequence(calldata->server,
5387 &calldata->arg.seq_args,
5388 &calldata->res.seq_res,
5390 nfs_release_seqid(calldata->arg.seqid);
5393 task->tk_action = NULL;
5395 nfs4_sequence_done(task, &calldata->res.seq_res);
5398 static const struct rpc_call_ops nfs4_locku_ops = {
5399 .rpc_call_prepare = nfs4_locku_prepare,
5400 .rpc_call_done = nfs4_locku_done,
5401 .rpc_release = nfs4_locku_release_calldata,
5404 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5405 struct nfs_open_context *ctx,
5406 struct nfs4_lock_state *lsp,
5407 struct nfs_seqid *seqid)
5409 struct nfs4_unlockdata *data;
5410 struct rpc_message msg = {
5411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5412 .rpc_cred = ctx->cred,
5414 struct rpc_task_setup task_setup_data = {
5415 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5416 .rpc_message = &msg,
5417 .callback_ops = &nfs4_locku_ops,
5418 .workqueue = nfsiod_workqueue,
5419 .flags = RPC_TASK_ASYNC,
5422 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5423 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5425 /* Ensure this is an unlock - when canceling a lock, the
5426 * canceled lock is passed in, and it won't be an unlock.
5428 fl->fl_type = F_UNLCK;
5430 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5432 nfs_free_seqid(seqid);
5433 return ERR_PTR(-ENOMEM);
5436 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5437 msg.rpc_argp = &data->arg;
5438 msg.rpc_resp = &data->res;
5439 task_setup_data.callback_data = data;
5440 return rpc_run_task(&task_setup_data);
5443 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5445 struct inode *inode = state->inode;
5446 struct nfs4_state_owner *sp = state->owner;
5447 struct nfs_inode *nfsi = NFS_I(inode);
5448 struct nfs_seqid *seqid;
5449 struct nfs4_lock_state *lsp;
5450 struct rpc_task *task;
5452 unsigned char fl_flags = request->fl_flags;
5454 status = nfs4_set_lock_state(state, request);
5455 /* Unlock _before_ we do the RPC call */
5456 request->fl_flags |= FL_EXISTS;
5457 /* Exclude nfs_delegation_claim_locks() */
5458 mutex_lock(&sp->so_delegreturn_mutex);
5459 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5460 down_read(&nfsi->rwsem);
5461 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5462 up_read(&nfsi->rwsem);
5463 mutex_unlock(&sp->so_delegreturn_mutex);
5466 up_read(&nfsi->rwsem);
5467 mutex_unlock(&sp->so_delegreturn_mutex);
5470 /* Is this a delegated lock? */
5471 lsp = request->fl_u.nfs4_fl.owner;
5472 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5474 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5478 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5479 status = PTR_ERR(task);
5482 status = nfs4_wait_for_completion_rpc_task(task);
5485 request->fl_flags = fl_flags;
5486 trace_nfs4_unlock(request, state, F_SETLK, status);
5490 struct nfs4_lockdata {
5491 struct nfs_lock_args arg;
5492 struct nfs_lock_res res;
5493 struct nfs4_lock_state *lsp;
5494 struct nfs_open_context *ctx;
5495 struct file_lock fl;
5496 unsigned long timestamp;
5499 struct nfs_server *server;
5502 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5503 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5506 struct nfs4_lockdata *p;
5507 struct inode *inode = lsp->ls_state->inode;
5508 struct nfs_server *server = NFS_SERVER(inode);
5510 p = kzalloc(sizeof(*p), gfp_mask);
5514 p->arg.fh = NFS_FH(inode);
5516 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5517 if (p->arg.open_seqid == NULL)
5519 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
5520 if (p->arg.lock_seqid == NULL)
5521 goto out_free_seqid;
5522 p->arg.lock_stateid = &lsp->ls_stateid;
5523 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5524 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5525 p->arg.lock_owner.s_dev = server->s_dev;
5526 p->res.lock_seqid = p->arg.lock_seqid;
5529 atomic_inc(&lsp->ls_count);
5530 p->ctx = get_nfs_open_context(ctx);
5531 memcpy(&p->fl, fl, sizeof(p->fl));
5534 nfs_free_seqid(p->arg.open_seqid);
5540 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5542 struct nfs4_lockdata *data = calldata;
5543 struct nfs4_state *state = data->lsp->ls_state;
5545 dprintk("%s: begin!\n", __func__);
5546 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5548 /* Do we need to do an open_to_lock_owner? */
5549 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
5550 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5551 goto out_release_lock_seqid;
5553 data->arg.open_stateid = &state->open_stateid;
5554 data->arg.new_lock_owner = 1;
5555 data->res.open_seqid = data->arg.open_seqid;
5557 data->arg.new_lock_owner = 0;
5558 if (!nfs4_valid_open_stateid(state)) {
5559 data->rpc_status = -EBADF;
5560 task->tk_action = NULL;
5561 goto out_release_open_seqid;
5563 data->timestamp = jiffies;
5564 if (nfs4_setup_sequence(data->server,
5565 &data->arg.seq_args,
5569 out_release_open_seqid:
5570 nfs_release_seqid(data->arg.open_seqid);
5571 out_release_lock_seqid:
5572 nfs_release_seqid(data->arg.lock_seqid);
5574 nfs4_sequence_done(task, &data->res.seq_res);
5575 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5578 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5580 struct nfs4_lockdata *data = calldata;
5582 dprintk("%s: begin!\n", __func__);
5584 if (!nfs4_sequence_done(task, &data->res.seq_res))
5587 data->rpc_status = task->tk_status;
5588 if (data->arg.new_lock_owner != 0) {
5589 if (data->rpc_status == 0)
5590 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5594 if (data->rpc_status == 0) {
5595 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
5596 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
5597 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
5600 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5603 static void nfs4_lock_release(void *calldata)
5605 struct nfs4_lockdata *data = calldata;
5607 dprintk("%s: begin!\n", __func__);
5608 nfs_free_seqid(data->arg.open_seqid);
5609 if (data->cancelled != 0) {
5610 struct rpc_task *task;
5611 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5612 data->arg.lock_seqid);
5614 rpc_put_task_async(task);
5615 dprintk("%s: cancelling lock!\n", __func__);
5617 nfs_free_seqid(data->arg.lock_seqid);
5618 nfs4_put_lock_state(data->lsp);
5619 put_nfs_open_context(data->ctx);
5621 dprintk("%s: done!\n", __func__);
5624 static const struct rpc_call_ops nfs4_lock_ops = {
5625 .rpc_call_prepare = nfs4_lock_prepare,
5626 .rpc_call_done = nfs4_lock_done,
5627 .rpc_release = nfs4_lock_release,
5630 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5633 case -NFS4ERR_ADMIN_REVOKED:
5634 case -NFS4ERR_BAD_STATEID:
5635 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5636 if (new_lock_owner != 0 ||
5637 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5638 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5640 case -NFS4ERR_STALE_STATEID:
5641 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5642 case -NFS4ERR_EXPIRED:
5643 nfs4_schedule_lease_recovery(server->nfs_client);
5647 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5649 struct nfs4_lockdata *data;
5650 struct rpc_task *task;
5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5653 .rpc_cred = state->owner->so_cred,
5655 struct rpc_task_setup task_setup_data = {
5656 .rpc_client = NFS_CLIENT(state->inode),
5657 .rpc_message = &msg,
5658 .callback_ops = &nfs4_lock_ops,
5659 .workqueue = nfsiod_workqueue,
5660 .flags = RPC_TASK_ASYNC,
5664 dprintk("%s: begin!\n", __func__);
5665 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5666 fl->fl_u.nfs4_fl.owner,
5667 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5671 data->arg.block = 1;
5672 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5673 msg.rpc_argp = &data->arg;
5674 msg.rpc_resp = &data->res;
5675 task_setup_data.callback_data = data;
5676 if (recovery_type > NFS_LOCK_NEW) {
5677 if (recovery_type == NFS_LOCK_RECLAIM)
5678 data->arg.reclaim = NFS_LOCK_RECLAIM;
5679 nfs4_set_sequence_privileged(&data->arg.seq_args);
5681 task = rpc_run_task(&task_setup_data);
5683 return PTR_ERR(task);
5684 ret = nfs4_wait_for_completion_rpc_task(task);
5686 ret = data->rpc_status;
5688 nfs4_handle_setlk_error(data->server, data->lsp,
5689 data->arg.new_lock_owner, ret);
5691 data->cancelled = 1;
5693 dprintk("%s: done, ret = %d!\n", __func__, ret);
5697 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5699 struct nfs_server *server = NFS_SERVER(state->inode);
5700 struct nfs4_exception exception = {
5701 .inode = state->inode,
5706 /* Cache the lock if possible... */
5707 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5709 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5710 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5711 if (err != -NFS4ERR_DELAY)
5713 nfs4_handle_exception(server, err, &exception);
5714 } while (exception.retry);
5718 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5720 struct nfs_server *server = NFS_SERVER(state->inode);
5721 struct nfs4_exception exception = {
5722 .inode = state->inode,
5726 err = nfs4_set_lock_state(state, request);
5729 if (!recover_lost_locks) {
5730 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5736 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5737 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5741 case -NFS4ERR_GRACE:
5742 case -NFS4ERR_DELAY:
5743 nfs4_handle_exception(server, err, &exception);
5746 } while (exception.retry);
5751 #if defined(CONFIG_NFS_V4_1)
5753 * nfs41_check_expired_locks - possibly free a lock stateid
5755 * @state: NFSv4 state for an inode
5757 * Returns NFS_OK if recovery for this stateid is now finished.
5758 * Otherwise a negative NFS4ERR value is returned.
5760 static int nfs41_check_expired_locks(struct nfs4_state *state)
5762 int status, ret = -NFS4ERR_BAD_STATEID;
5763 struct nfs4_lock_state *lsp;
5764 struct nfs_server *server = NFS_SERVER(state->inode);
5766 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5767 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5768 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5770 status = nfs41_test_stateid(server,
5773 trace_nfs4_test_lock_stateid(state, lsp, status);
5774 if (status != NFS_OK) {
5775 /* Free the stateid unless the server
5776 * informs us the stateid is unrecognized. */
5777 if (status != -NFS4ERR_BAD_STATEID)
5778 nfs41_free_stateid(server,
5781 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5790 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5792 int status = NFS_OK;
5794 if (test_bit(LK_STATE_IN_USE, &state->flags))
5795 status = nfs41_check_expired_locks(state);
5796 if (status != NFS_OK)
5797 status = nfs4_lock_expired(state, request);
5802 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5804 struct nfs4_state_owner *sp = state->owner;
5805 struct nfs_inode *nfsi = NFS_I(state->inode);
5806 unsigned char fl_flags = request->fl_flags;
5808 int status = -ENOLCK;
5810 if ((fl_flags & FL_POSIX) &&
5811 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5813 /* Is this a delegated open? */
5814 status = nfs4_set_lock_state(state, request);
5817 request->fl_flags |= FL_ACCESS;
5818 status = do_vfs_lock(request->fl_file, request);
5821 down_read(&nfsi->rwsem);
5822 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5823 /* Yes: cache locks! */
5824 /* ...but avoid races with delegation recall... */
5825 request->fl_flags = fl_flags & ~FL_SLEEP;
5826 status = do_vfs_lock(request->fl_file, request);
5829 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5830 up_read(&nfsi->rwsem);
5831 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5834 down_read(&nfsi->rwsem);
5835 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5836 status = -NFS4ERR_DELAY;
5839 /* Note: we always want to sleep here! */
5840 request->fl_flags = fl_flags | FL_SLEEP;
5841 if (do_vfs_lock(request->fl_file, request) < 0)
5842 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5843 "manager!\n", __func__);
5845 up_read(&nfsi->rwsem);
5847 request->fl_flags = fl_flags;
5851 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5853 struct nfs4_exception exception = {
5855 .inode = state->inode,
5860 err = _nfs4_proc_setlk(state, cmd, request);
5861 trace_nfs4_set_lock(request, state, cmd, err);
5862 if (err == -NFS4ERR_DENIED)
5864 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5866 } while (exception.retry);
5871 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5873 struct nfs_open_context *ctx;
5874 struct nfs4_state *state;
5875 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5878 /* verify open state */
5879 ctx = nfs_file_open_context(filp);
5882 if (request->fl_start < 0 || request->fl_end < 0)
5885 if (IS_GETLK(cmd)) {
5887 return nfs4_proc_getlk(state, F_GETLK, request);
5891 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5894 if (request->fl_type == F_UNLCK) {
5896 return nfs4_proc_unlck(state, cmd, request);
5903 * Don't rely on the VFS having checked the file open mode,
5904 * since it won't do this for flock() locks.
5906 switch (request->fl_type) {
5908 if (!(filp->f_mode & FMODE_READ))
5912 if (!(filp->f_mode & FMODE_WRITE))
5917 status = nfs4_proc_setlk(state, cmd, request);
5918 if ((status != -EAGAIN) || IS_SETLK(cmd))
5920 timeout = nfs4_set_lock_task_retry(timeout);
5921 status = -ERESTARTSYS;
5924 } while(status < 0);
5928 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
5930 struct nfs_server *server = NFS_SERVER(state->inode);
5933 err = nfs4_set_lock_state(state, fl);
5936 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5937 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
5940 struct nfs_release_lockowner_data {
5941 struct nfs4_lock_state *lsp;
5942 struct nfs_server *server;
5943 struct nfs_release_lockowner_args args;
5944 struct nfs_release_lockowner_res res;
5945 unsigned long timestamp;
5948 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5950 struct nfs_release_lockowner_data *data = calldata;
5951 struct nfs_server *server = data->server;
5952 nfs40_setup_sequence(server, &data->args.seq_args,
5953 &data->res.seq_res, task);
5954 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5955 data->timestamp = jiffies;
5958 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5960 struct nfs_release_lockowner_data *data = calldata;
5961 struct nfs_server *server = data->server;
5963 nfs40_sequence_done(task, &data->res.seq_res);
5965 switch (task->tk_status) {
5967 renew_lease(server, data->timestamp);
5969 case -NFS4ERR_STALE_CLIENTID:
5970 case -NFS4ERR_EXPIRED:
5971 nfs4_schedule_lease_recovery(server->nfs_client);
5973 case -NFS4ERR_LEASE_MOVED:
5974 case -NFS4ERR_DELAY:
5975 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5976 rpc_restart_call_prepare(task);
5980 static void nfs4_release_lockowner_release(void *calldata)
5982 struct nfs_release_lockowner_data *data = calldata;
5983 nfs4_free_lock_state(data->server, data->lsp);
5987 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5988 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5989 .rpc_call_done = nfs4_release_lockowner_done,
5990 .rpc_release = nfs4_release_lockowner_release,
5994 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
5996 struct nfs_release_lockowner_data *data;
5997 struct rpc_message msg = {
5998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6001 if (server->nfs_client->cl_mvops->minor_version != 0)
6004 data = kmalloc(sizeof(*data), GFP_NOFS);
6008 data->server = server;
6009 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6010 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6011 data->args.lock_owner.s_dev = server->s_dev;
6013 msg.rpc_argp = &data->args;
6014 msg.rpc_resp = &data->res;
6015 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6016 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6019 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6021 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6022 const void *buf, size_t buflen,
6023 int flags, int type)
6025 if (strcmp(key, "") != 0)
6028 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6031 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6032 void *buf, size_t buflen, int type)
6034 if (strcmp(key, "") != 0)
6037 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6040 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6041 size_t list_len, const char *name,
6042 size_t name_len, int type)
6044 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6046 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6049 if (list && len <= list_len)
6050 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6054 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6055 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6057 return server->caps & NFS_CAP_SECURITY_LABEL;
6060 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6061 const void *buf, size_t buflen,
6062 int flags, int type)
6064 if (security_ismaclabel(key))
6065 return nfs4_set_security_label(dentry, buf, buflen);
6070 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6071 void *buf, size_t buflen, int type)
6073 if (security_ismaclabel(key))
6074 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6078 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6079 size_t list_len, const char *name,
6080 size_t name_len, int type)
6084 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6085 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6086 if (list && len <= list_len)
6087 security_inode_listsecurity(dentry->d_inode, list, len);
6092 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6093 .prefix = XATTR_SECURITY_PREFIX,
6094 .list = nfs4_xattr_list_nfs4_label,
6095 .get = nfs4_xattr_get_nfs4_label,
6096 .set = nfs4_xattr_set_nfs4_label,
6102 * nfs_fhget will use either the mounted_on_fileid or the fileid
6104 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6106 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6107 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6108 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6109 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6112 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6113 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6114 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6118 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6119 const struct qstr *name,
6120 struct nfs4_fs_locations *fs_locations,
6123 struct nfs_server *server = NFS_SERVER(dir);
6125 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6127 struct nfs4_fs_locations_arg args = {
6128 .dir_fh = NFS_FH(dir),
6133 struct nfs4_fs_locations_res res = {
6134 .fs_locations = fs_locations,
6136 struct rpc_message msg = {
6137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6143 dprintk("%s: start\n", __func__);
6145 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6146 * is not supported */
6147 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6148 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6150 bitmask[0] |= FATTR4_WORD0_FILEID;
6152 nfs_fattr_init(&fs_locations->fattr);
6153 fs_locations->server = server;
6154 fs_locations->nlocations = 0;
6155 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6156 dprintk("%s: returned status = %d\n", __func__, status);
6160 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6161 const struct qstr *name,
6162 struct nfs4_fs_locations *fs_locations,
6165 struct nfs4_exception exception = { };
6168 err = _nfs4_proc_fs_locations(client, dir, name,
6169 fs_locations, page);
6170 trace_nfs4_get_fs_locations(dir, name, err);
6171 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6173 } while (exception.retry);
6178 * This operation also signals the server that this client is
6179 * performing migration recovery. The server can stop returning
6180 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6181 * appended to this compound to identify the client ID which is
6182 * performing recovery.
6184 static int _nfs40_proc_get_locations(struct inode *inode,
6185 struct nfs4_fs_locations *locations,
6186 struct page *page, struct rpc_cred *cred)
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct rpc_clnt *clnt = server->client;
6191 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6193 struct nfs4_fs_locations_arg args = {
6194 .clientid = server->nfs_client->cl_clientid,
6195 .fh = NFS_FH(inode),
6198 .migration = 1, /* skip LOOKUP */
6199 .renew = 1, /* append RENEW */
6201 struct nfs4_fs_locations_res res = {
6202 .fs_locations = locations,
6206 struct rpc_message msg = {
6207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6212 unsigned long now = jiffies;
6215 nfs_fattr_init(&locations->fattr);
6216 locations->server = server;
6217 locations->nlocations = 0;
6219 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6220 nfs4_set_sequence_privileged(&args.seq_args);
6221 status = nfs4_call_sync_sequence(clnt, server, &msg,
6222 &args.seq_args, &res.seq_res);
6226 renew_lease(server, now);
6230 #ifdef CONFIG_NFS_V4_1
6233 * This operation also signals the server that this client is
6234 * performing migration recovery. The server can stop asserting
6235 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6236 * performing this operation is identified in the SEQUENCE
6237 * operation in this compound.
6239 * When the client supports GETATTR(fs_locations_info), it can
6240 * be plumbed in here.
6242 static int _nfs41_proc_get_locations(struct inode *inode,
6243 struct nfs4_fs_locations *locations,
6244 struct page *page, struct rpc_cred *cred)
6246 struct nfs_server *server = NFS_SERVER(inode);
6247 struct rpc_clnt *clnt = server->client;
6249 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6251 struct nfs4_fs_locations_arg args = {
6252 .fh = NFS_FH(inode),
6255 .migration = 1, /* skip LOOKUP */
6257 struct nfs4_fs_locations_res res = {
6258 .fs_locations = locations,
6261 struct rpc_message msg = {
6262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6269 nfs_fattr_init(&locations->fattr);
6270 locations->server = server;
6271 locations->nlocations = 0;
6273 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6274 nfs4_set_sequence_privileged(&args.seq_args);
6275 status = nfs4_call_sync_sequence(clnt, server, &msg,
6276 &args.seq_args, &res.seq_res);
6277 if (status == NFS4_OK &&
6278 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6279 status = -NFS4ERR_LEASE_MOVED;
6283 #endif /* CONFIG_NFS_V4_1 */
6286 * nfs4_proc_get_locations - discover locations for a migrated FSID
6287 * @inode: inode on FSID that is migrating
6288 * @locations: result of query
6290 * @cred: credential to use for this operation
6292 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6293 * operation failed, or a negative errno if a local error occurred.
6295 * On success, "locations" is filled in, but if the server has
6296 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6299 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6300 * from this client that require migration recovery.
6302 int nfs4_proc_get_locations(struct inode *inode,
6303 struct nfs4_fs_locations *locations,
6304 struct page *page, struct rpc_cred *cred)
6306 struct nfs_server *server = NFS_SERVER(inode);
6307 struct nfs_client *clp = server->nfs_client;
6308 const struct nfs4_mig_recovery_ops *ops =
6309 clp->cl_mvops->mig_recovery_ops;
6310 struct nfs4_exception exception = { };
6313 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6314 (unsigned long long)server->fsid.major,
6315 (unsigned long long)server->fsid.minor,
6317 nfs_display_fhandle(NFS_FH(inode), __func__);
6320 status = ops->get_locations(inode, locations, page, cred);
6321 if (status != -NFS4ERR_DELAY)
6323 nfs4_handle_exception(server, status, &exception);
6324 } while (exception.retry);
6329 * This operation also signals the server that this client is
6330 * performing "lease moved" recovery. The server can stop
6331 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6332 * is appended to this compound to identify the client ID which is
6333 * performing recovery.
6335 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6337 struct nfs_server *server = NFS_SERVER(inode);
6338 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6339 struct rpc_clnt *clnt = server->client;
6340 struct nfs4_fsid_present_arg args = {
6341 .fh = NFS_FH(inode),
6342 .clientid = clp->cl_clientid,
6343 .renew = 1, /* append RENEW */
6345 struct nfs4_fsid_present_res res = {
6348 struct rpc_message msg = {
6349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6354 unsigned long now = jiffies;
6357 res.fh = nfs_alloc_fhandle();
6361 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6362 nfs4_set_sequence_privileged(&args.seq_args);
6363 status = nfs4_call_sync_sequence(clnt, server, &msg,
6364 &args.seq_args, &res.seq_res);
6365 nfs_free_fhandle(res.fh);
6369 do_renew_lease(clp, now);
6373 #ifdef CONFIG_NFS_V4_1
6376 * This operation also signals the server that this client is
6377 * performing "lease moved" recovery. The server can stop asserting
6378 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6379 * this operation is identified in the SEQUENCE operation in this
6382 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6384 struct nfs_server *server = NFS_SERVER(inode);
6385 struct rpc_clnt *clnt = server->client;
6386 struct nfs4_fsid_present_arg args = {
6387 .fh = NFS_FH(inode),
6389 struct nfs4_fsid_present_res res = {
6391 struct rpc_message msg = {
6392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6399 res.fh = nfs_alloc_fhandle();
6403 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6404 nfs4_set_sequence_privileged(&args.seq_args);
6405 status = nfs4_call_sync_sequence(clnt, server, &msg,
6406 &args.seq_args, &res.seq_res);
6407 nfs_free_fhandle(res.fh);
6408 if (status == NFS4_OK &&
6409 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6410 status = -NFS4ERR_LEASE_MOVED;
6414 #endif /* CONFIG_NFS_V4_1 */
6417 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6418 * @inode: inode on FSID to check
6419 * @cred: credential to use for this operation
6421 * Server indicates whether the FSID is present, moved, or not
6422 * recognized. This operation is necessary to clear a LEASE_MOVED
6423 * condition for this client ID.
6425 * Returns NFS4_OK if the FSID is present on this server,
6426 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6427 * NFS4ERR code if some error occurred on the server, or a
6428 * negative errno if a local failure occurred.
6430 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6432 struct nfs_server *server = NFS_SERVER(inode);
6433 struct nfs_client *clp = server->nfs_client;
6434 const struct nfs4_mig_recovery_ops *ops =
6435 clp->cl_mvops->mig_recovery_ops;
6436 struct nfs4_exception exception = { };
6439 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6440 (unsigned long long)server->fsid.major,
6441 (unsigned long long)server->fsid.minor,
6443 nfs_display_fhandle(NFS_FH(inode), __func__);
6446 status = ops->fsid_present(inode, cred);
6447 if (status != -NFS4ERR_DELAY)
6449 nfs4_handle_exception(server, status, &exception);
6450 } while (exception.retry);
6455 * If 'use_integrity' is true and the state managment nfs_client
6456 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6457 * and the machine credential as per RFC3530bis and RFC5661 Security
6458 * Considerations sections. Otherwise, just use the user cred with the
6459 * filesystem's rpc_client.
6461 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6464 struct nfs4_secinfo_arg args = {
6465 .dir_fh = NFS_FH(dir),
6468 struct nfs4_secinfo_res res = {
6471 struct rpc_message msg = {
6472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6476 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6477 struct rpc_cred *cred = NULL;
6479 if (use_integrity) {
6480 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6481 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6482 msg.rpc_cred = cred;
6485 dprintk("NFS call secinfo %s\n", name->name);
6487 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6488 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6490 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6492 dprintk("NFS reply secinfo: %d\n", status);
6500 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6501 struct nfs4_secinfo_flavors *flavors)
6503 struct nfs4_exception exception = { };
6506 err = -NFS4ERR_WRONGSEC;
6508 /* try to use integrity protection with machine cred */
6509 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6510 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6513 * if unable to use integrity protection, or SECINFO with
6514 * integrity protection returns NFS4ERR_WRONGSEC (which is
6515 * disallowed by spec, but exists in deployed servers) use
6516 * the current filesystem's rpc_client and the user cred.
6518 if (err == -NFS4ERR_WRONGSEC)
6519 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6521 trace_nfs4_secinfo(dir, name, err);
6522 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6524 } while (exception.retry);
6528 #ifdef CONFIG_NFS_V4_1
6530 * Check the exchange flags returned by the server for invalid flags, having
6531 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6534 static int nfs4_check_cl_exchange_flags(u32 flags)
6536 if (flags & ~EXCHGID4_FLAG_MASK_R)
6538 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6539 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6541 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6545 return -NFS4ERR_INVAL;
6549 nfs41_same_server_scope(struct nfs41_server_scope *a,
6550 struct nfs41_server_scope *b)
6552 if (a->server_scope_sz == b->server_scope_sz &&
6553 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6560 * nfs4_proc_bind_conn_to_session()
6562 * The 4.1 client currently uses the same TCP connection for the
6563 * fore and backchannel.
6565 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6568 struct nfs41_bind_conn_to_session_res res;
6569 struct rpc_message msg = {
6571 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6577 dprintk("--> %s\n", __func__);
6579 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6580 if (unlikely(res.session == NULL)) {
6585 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6586 trace_nfs4_bind_conn_to_session(clp, status);
6588 if (memcmp(res.session->sess_id.data,
6589 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6590 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6594 if (res.dir != NFS4_CDFS4_BOTH) {
6595 dprintk("NFS: %s: Unexpected direction from server\n",
6600 if (res.use_conn_in_rdma_mode) {
6601 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6610 dprintk("<-- %s status= %d\n", __func__, status);
6615 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6616 * and operations we'd like to see to enable certain features in the allow map
6618 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6619 .how = SP4_MACH_CRED,
6620 .enforce.u.words = {
6621 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6622 1 << (OP_EXCHANGE_ID - 32) |
6623 1 << (OP_CREATE_SESSION - 32) |
6624 1 << (OP_DESTROY_SESSION - 32) |
6625 1 << (OP_DESTROY_CLIENTID - 32)
6628 [0] = 1 << (OP_CLOSE) |
6631 [1] = 1 << (OP_SECINFO - 32) |
6632 1 << (OP_SECINFO_NO_NAME - 32) |
6633 1 << (OP_TEST_STATEID - 32) |
6634 1 << (OP_FREE_STATEID - 32) |
6635 1 << (OP_WRITE - 32)
6640 * Select the state protection mode for client `clp' given the server results
6641 * from exchange_id in `sp'.
6643 * Returns 0 on success, negative errno otherwise.
6645 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6646 struct nfs41_state_protection *sp)
6648 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6649 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6650 1 << (OP_EXCHANGE_ID - 32) |
6651 1 << (OP_CREATE_SESSION - 32) |
6652 1 << (OP_DESTROY_SESSION - 32) |
6653 1 << (OP_DESTROY_CLIENTID - 32)
6657 if (sp->how == SP4_MACH_CRED) {
6658 /* Print state protect result */
6659 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6660 for (i = 0; i <= LAST_NFS4_OP; i++) {
6661 if (test_bit(i, sp->enforce.u.longs))
6662 dfprintk(MOUNT, " enforce op %d\n", i);
6663 if (test_bit(i, sp->allow.u.longs))
6664 dfprintk(MOUNT, " allow op %d\n", i);
6667 /* make sure nothing is on enforce list that isn't supported */
6668 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6669 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6670 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6676 * Minimal mode - state operations are allowed to use machine
6677 * credential. Note this already happens by default, so the
6678 * client doesn't have to do anything more than the negotiation.
6680 * NOTE: we don't care if EXCHANGE_ID is in the list -
6681 * we're already using the machine cred for exchange_id
6682 * and will never use a different cred.
6684 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6685 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6686 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6687 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6688 dfprintk(MOUNT, "sp4_mach_cred:\n");
6689 dfprintk(MOUNT, " minimal mode enabled\n");
6690 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6692 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6696 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6697 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6698 dfprintk(MOUNT, " cleanup mode enabled\n");
6699 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6702 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6703 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " secinfo mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6708 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6709 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6710 dfprintk(MOUNT, " stateid mode enabled\n");
6711 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6714 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6715 dfprintk(MOUNT, " write mode enabled\n");
6716 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6719 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6720 dfprintk(MOUNT, " commit mode enabled\n");
6721 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6729 * _nfs4_proc_exchange_id()
6731 * Wrapper for EXCHANGE_ID operation.
6733 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6736 nfs4_verifier verifier;
6737 struct nfs41_exchange_id_args args = {
6738 .verifier = &verifier,
6740 #ifdef CONFIG_NFS_V4_1_MIGRATION
6741 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6742 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6743 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6745 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6746 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6749 struct nfs41_exchange_id_res res = {
6753 struct rpc_message msg = {
6754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6760 nfs4_init_boot_verifier(clp, &verifier);
6761 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6763 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6764 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6765 args.id_len, args.id);
6767 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6769 if (unlikely(res.server_owner == NULL)) {
6774 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6776 if (unlikely(res.server_scope == NULL)) {
6778 goto out_server_owner;
6781 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6782 if (unlikely(res.impl_id == NULL)) {
6784 goto out_server_scope;
6789 args.state_protect.how = SP4_NONE;
6793 args.state_protect = nfs4_sp4_mach_cred_request;
6800 goto out_server_scope;
6803 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6804 trace_nfs4_exchange_id(clp, status);
6806 status = nfs4_check_cl_exchange_flags(res.flags);
6809 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6812 clp->cl_clientid = res.clientid;
6813 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6814 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6815 clp->cl_seqid = res.seqid;
6817 kfree(clp->cl_serverowner);
6818 clp->cl_serverowner = res.server_owner;
6819 res.server_owner = NULL;
6821 /* use the most recent implementation id */
6822 kfree(clp->cl_implid);
6823 clp->cl_implid = res.impl_id;
6825 if (clp->cl_serverscope != NULL &&
6826 !nfs41_same_server_scope(clp->cl_serverscope,
6827 res.server_scope)) {
6828 dprintk("%s: server_scope mismatch detected\n",
6830 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
6831 kfree(clp->cl_serverscope);
6832 clp->cl_serverscope = NULL;
6835 if (clp->cl_serverscope == NULL) {
6836 clp->cl_serverscope = res.server_scope;
6843 kfree(res.server_owner);
6845 kfree(res.server_scope);
6847 if (clp->cl_implid != NULL)
6848 dprintk("NFS reply exchange_id: Server Implementation ID: "
6849 "domain: %s, name: %s, date: %llu,%u\n",
6850 clp->cl_implid->domain, clp->cl_implid->name,
6851 clp->cl_implid->date.seconds,
6852 clp->cl_implid->date.nseconds);
6853 dprintk("NFS reply exchange_id: %d\n", status);
6858 * nfs4_proc_exchange_id()
6860 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6862 * Since the clientid has expired, all compounds using sessions
6863 * associated with the stale clientid will be returning
6864 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6865 * be in some phase of session reset.
6867 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6869 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6871 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6874 /* try SP4_MACH_CRED if krb5i/p */
6875 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6876 authflavor == RPC_AUTH_GSS_KRB5P) {
6877 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6883 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6886 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6887 struct rpc_cred *cred)
6889 struct rpc_message msg = {
6890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6896 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6897 trace_nfs4_destroy_clientid(clp, status);
6899 dprintk("NFS: Got error %d from the server %s on "
6900 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6904 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6905 struct rpc_cred *cred)
6910 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6911 ret = _nfs4_proc_destroy_clientid(clp, cred);
6913 case -NFS4ERR_DELAY:
6914 case -NFS4ERR_CLIENTID_BUSY:
6924 int nfs4_destroy_clientid(struct nfs_client *clp)
6926 struct rpc_cred *cred;
6929 if (clp->cl_mvops->minor_version < 1)
6931 if (clp->cl_exchange_flags == 0)
6933 if (clp->cl_preserve_clid)
6935 cred = nfs4_get_clid_cred(clp);
6936 ret = nfs4_proc_destroy_clientid(clp, cred);
6941 case -NFS4ERR_STALE_CLIENTID:
6942 clp->cl_exchange_flags = 0;
6948 struct nfs4_get_lease_time_data {
6949 struct nfs4_get_lease_time_args *args;
6950 struct nfs4_get_lease_time_res *res;
6951 struct nfs_client *clp;
6954 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6957 struct nfs4_get_lease_time_data *data =
6958 (struct nfs4_get_lease_time_data *)calldata;
6960 dprintk("--> %s\n", __func__);
6961 /* just setup sequence, do not trigger session recovery
6962 since we're invoked within one */
6963 nfs41_setup_sequence(data->clp->cl_session,
6964 &data->args->la_seq_args,
6965 &data->res->lr_seq_res,
6967 dprintk("<-- %s\n", __func__);
6971 * Called from nfs4_state_manager thread for session setup, so don't recover
6972 * from sequence operation or clientid errors.
6974 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6976 struct nfs4_get_lease_time_data *data =
6977 (struct nfs4_get_lease_time_data *)calldata;
6979 dprintk("--> %s\n", __func__);
6980 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6982 switch (task->tk_status) {
6983 case -NFS4ERR_DELAY:
6984 case -NFS4ERR_GRACE:
6985 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6986 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6987 task->tk_status = 0;
6989 case -NFS4ERR_RETRY_UNCACHED_REP:
6990 rpc_restart_call_prepare(task);
6993 dprintk("<-- %s\n", __func__);
6996 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
6997 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6998 .rpc_call_done = nfs4_get_lease_time_done,
7001 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7003 struct rpc_task *task;
7004 struct nfs4_get_lease_time_args args;
7005 struct nfs4_get_lease_time_res res = {
7006 .lr_fsinfo = fsinfo,
7008 struct nfs4_get_lease_time_data data = {
7013 struct rpc_message msg = {
7014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7018 struct rpc_task_setup task_setup = {
7019 .rpc_client = clp->cl_rpcclient,
7020 .rpc_message = &msg,
7021 .callback_ops = &nfs4_get_lease_time_ops,
7022 .callback_data = &data,
7023 .flags = RPC_TASK_TIMEOUT,
7027 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7028 nfs4_set_sequence_privileged(&args.la_seq_args);
7029 dprintk("--> %s\n", __func__);
7030 task = rpc_run_task(&task_setup);
7033 status = PTR_ERR(task);
7035 status = task->tk_status;
7038 dprintk("<-- %s return %d\n", __func__, status);
7044 * Initialize the values to be used by the client in CREATE_SESSION
7045 * If nfs4_init_session set the fore channel request and response sizes,
7048 * Set the back channel max_resp_sz_cached to zero to force the client to
7049 * always set csa_cachethis to FALSE because the current implementation
7050 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7052 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7054 unsigned int max_rqst_sz, max_resp_sz;
7056 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7057 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7059 /* Fore channel attributes */
7060 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7061 args->fc_attrs.max_resp_sz = max_resp_sz;
7062 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7063 args->fc_attrs.max_reqs = max_session_slots;
7065 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7066 "max_ops=%u max_reqs=%u\n",
7068 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7069 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7071 /* Back channel attributes */
7072 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7073 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7074 args->bc_attrs.max_resp_sz_cached = 0;
7075 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7076 args->bc_attrs.max_reqs = 1;
7078 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7079 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7081 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7082 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7083 args->bc_attrs.max_reqs);
7086 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7088 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7089 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7091 if (rcvd->max_resp_sz > sent->max_resp_sz)
7094 * Our requested max_ops is the minimum we need; we're not
7095 * prepared to break up compounds into smaller pieces than that.
7096 * So, no point even trying to continue if the server won't
7099 if (rcvd->max_ops < sent->max_ops)
7101 if (rcvd->max_reqs == 0)
7103 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7104 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7108 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7110 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7111 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
7113 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7115 if (rcvd->max_resp_sz < sent->max_resp_sz)
7117 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7119 /* These would render the backchannel useless: */
7120 if (rcvd->max_ops != sent->max_ops)
7122 if (rcvd->max_reqs != sent->max_reqs)
7127 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7128 struct nfs4_session *session)
7132 ret = nfs4_verify_fore_channel_attrs(args, session);
7135 return nfs4_verify_back_channel_attrs(args, session);
7138 static int _nfs4_proc_create_session(struct nfs_client *clp,
7139 struct rpc_cred *cred)
7141 struct nfs4_session *session = clp->cl_session;
7142 struct nfs41_create_session_args args = {
7144 .cb_program = NFS4_CALLBACK,
7146 struct nfs41_create_session_res res = {
7149 struct rpc_message msg = {
7150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7157 nfs4_init_channel_attrs(&args);
7158 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7160 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7161 trace_nfs4_create_session(clp, status);
7164 /* Verify the session's negotiated channel_attrs values */
7165 status = nfs4_verify_channel_attrs(&args, session);
7166 /* Increment the clientid slot sequence id */
7174 * Issues a CREATE_SESSION operation to the server.
7175 * It is the responsibility of the caller to verify the session is
7176 * expired before calling this routine.
7178 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7182 struct nfs4_session *session = clp->cl_session;
7184 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7186 status = _nfs4_proc_create_session(clp, cred);
7190 /* Init or reset the session slot tables */
7191 status = nfs4_setup_session_slot_tables(session);
7192 dprintk("slot table setup returned %d\n", status);
7196 ptr = (unsigned *)&session->sess_id.data[0];
7197 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7198 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7200 dprintk("<-- %s\n", __func__);
7205 * Issue the over-the-wire RPC DESTROY_SESSION.
7206 * The caller must serialize access to this routine.
7208 int nfs4_proc_destroy_session(struct nfs4_session *session,
7209 struct rpc_cred *cred)
7211 struct rpc_message msg = {
7212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7213 .rpc_argp = session,
7218 dprintk("--> nfs4_proc_destroy_session\n");
7220 /* session is still being setup */
7221 if (session->clp->cl_cons_state != NFS_CS_READY)
7224 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7225 trace_nfs4_destroy_session(session->clp, status);
7228 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7229 "Session has been destroyed regardless...\n", status);
7231 dprintk("<-- nfs4_proc_destroy_session\n");
7236 * Renew the cl_session lease.
7238 struct nfs4_sequence_data {
7239 struct nfs_client *clp;
7240 struct nfs4_sequence_args args;
7241 struct nfs4_sequence_res res;
7244 static void nfs41_sequence_release(void *data)
7246 struct nfs4_sequence_data *calldata = data;
7247 struct nfs_client *clp = calldata->clp;
7249 if (atomic_read(&clp->cl_count) > 1)
7250 nfs4_schedule_state_renewal(clp);
7251 nfs_put_client(clp);
7255 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7257 switch(task->tk_status) {
7258 case -NFS4ERR_DELAY:
7259 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7262 nfs4_schedule_lease_recovery(clp);
7267 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7269 struct nfs4_sequence_data *calldata = data;
7270 struct nfs_client *clp = calldata->clp;
7272 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7275 trace_nfs4_sequence(clp, task->tk_status);
7276 if (task->tk_status < 0) {
7277 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7278 if (atomic_read(&clp->cl_count) == 1)
7281 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7282 rpc_restart_call_prepare(task);
7286 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7288 dprintk("<-- %s\n", __func__);
7291 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7293 struct nfs4_sequence_data *calldata = data;
7294 struct nfs_client *clp = calldata->clp;
7295 struct nfs4_sequence_args *args;
7296 struct nfs4_sequence_res *res;
7298 args = task->tk_msg.rpc_argp;
7299 res = task->tk_msg.rpc_resp;
7301 nfs41_setup_sequence(clp->cl_session, args, res, task);
7304 static const struct rpc_call_ops nfs41_sequence_ops = {
7305 .rpc_call_done = nfs41_sequence_call_done,
7306 .rpc_call_prepare = nfs41_sequence_prepare,
7307 .rpc_release = nfs41_sequence_release,
7310 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7311 struct rpc_cred *cred,
7314 struct nfs4_sequence_data *calldata;
7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7319 struct rpc_task_setup task_setup_data = {
7320 .rpc_client = clp->cl_rpcclient,
7321 .rpc_message = &msg,
7322 .callback_ops = &nfs41_sequence_ops,
7323 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7326 if (!atomic_inc_not_zero(&clp->cl_count))
7327 return ERR_PTR(-EIO);
7328 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7329 if (calldata == NULL) {
7330 nfs_put_client(clp);
7331 return ERR_PTR(-ENOMEM);
7333 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7335 nfs4_set_sequence_privileged(&calldata->args);
7336 msg.rpc_argp = &calldata->args;
7337 msg.rpc_resp = &calldata->res;
7338 calldata->clp = clp;
7339 task_setup_data.callback_data = calldata;
7341 return rpc_run_task(&task_setup_data);
7344 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7346 struct rpc_task *task;
7349 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7351 task = _nfs41_proc_sequence(clp, cred, false);
7353 ret = PTR_ERR(task);
7355 rpc_put_task_async(task);
7356 dprintk("<-- %s status=%d\n", __func__, ret);
7360 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7362 struct rpc_task *task;
7365 task = _nfs41_proc_sequence(clp, cred, true);
7367 ret = PTR_ERR(task);
7370 ret = rpc_wait_for_completion_task(task);
7372 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7374 if (task->tk_status == 0)
7375 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7376 ret = task->tk_status;
7380 dprintk("<-- %s status=%d\n", __func__, ret);
7384 struct nfs4_reclaim_complete_data {
7385 struct nfs_client *clp;
7386 struct nfs41_reclaim_complete_args arg;
7387 struct nfs41_reclaim_complete_res res;
7390 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7392 struct nfs4_reclaim_complete_data *calldata = data;
7394 nfs41_setup_sequence(calldata->clp->cl_session,
7395 &calldata->arg.seq_args,
7396 &calldata->res.seq_res,
7400 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7402 switch(task->tk_status) {
7404 case -NFS4ERR_COMPLETE_ALREADY:
7405 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7407 case -NFS4ERR_DELAY:
7408 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7410 case -NFS4ERR_RETRY_UNCACHED_REP:
7413 nfs4_schedule_lease_recovery(clp);
7418 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7420 struct nfs4_reclaim_complete_data *calldata = data;
7421 struct nfs_client *clp = calldata->clp;
7422 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7424 dprintk("--> %s\n", __func__);
7425 if (!nfs41_sequence_done(task, res))
7428 trace_nfs4_reclaim_complete(clp, task->tk_status);
7429 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7430 rpc_restart_call_prepare(task);
7433 dprintk("<-- %s\n", __func__);
7436 static void nfs4_free_reclaim_complete_data(void *data)
7438 struct nfs4_reclaim_complete_data *calldata = data;
7443 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7444 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7445 .rpc_call_done = nfs4_reclaim_complete_done,
7446 .rpc_release = nfs4_free_reclaim_complete_data,
7450 * Issue a global reclaim complete.
7452 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7453 struct rpc_cred *cred)
7455 struct nfs4_reclaim_complete_data *calldata;
7456 struct rpc_task *task;
7457 struct rpc_message msg = {
7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7461 struct rpc_task_setup task_setup_data = {
7462 .rpc_client = clp->cl_rpcclient,
7463 .rpc_message = &msg,
7464 .callback_ops = &nfs4_reclaim_complete_call_ops,
7465 .flags = RPC_TASK_ASYNC,
7467 int status = -ENOMEM;
7469 dprintk("--> %s\n", __func__);
7470 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7471 if (calldata == NULL)
7473 calldata->clp = clp;
7474 calldata->arg.one_fs = 0;
7476 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7477 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7478 msg.rpc_argp = &calldata->arg;
7479 msg.rpc_resp = &calldata->res;
7480 task_setup_data.callback_data = calldata;
7481 task = rpc_run_task(&task_setup_data);
7483 status = PTR_ERR(task);
7486 status = nfs4_wait_for_completion_rpc_task(task);
7488 status = task->tk_status;
7492 dprintk("<-- %s status=%d\n", __func__, status);
7497 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7499 struct nfs4_layoutget *lgp = calldata;
7500 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7501 struct nfs4_session *session = nfs4_get_session(server);
7503 dprintk("--> %s\n", __func__);
7504 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7505 * right now covering the LAYOUTGET we are about to send.
7506 * However, that is not so catastrophic, and there seems
7507 * to be no way to prevent it completely.
7509 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7510 &lgp->res.seq_res, task))
7512 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7513 NFS_I(lgp->args.inode)->layout,
7514 lgp->args.ctx->state)) {
7515 rpc_exit(task, NFS4_OK);
7519 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7521 struct nfs4_layoutget *lgp = calldata;
7522 struct inode *inode = lgp->args.inode;
7523 struct nfs_server *server = NFS_SERVER(inode);
7524 struct pnfs_layout_hdr *lo;
7525 struct nfs4_state *state = NULL;
7526 unsigned long timeo, now, giveup;
7528 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7530 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7533 switch (task->tk_status) {
7537 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7538 * (or clients) writing to the same RAID stripe
7540 case -NFS4ERR_LAYOUTTRYLATER:
7542 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7543 * existing layout before getting a new one).
7545 case -NFS4ERR_RECALLCONFLICT:
7546 timeo = rpc_get_timeout(task->tk_client);
7547 giveup = lgp->args.timestamp + timeo;
7549 if (time_after(giveup, now)) {
7550 unsigned long delay;
7553 * - Not less then NFS4_POLL_RETRY_MIN.
7554 * - One last time a jiffie before we give up
7555 * - exponential backoff (time_now minus start_attempt)
7557 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7558 min((giveup - now - 1),
7559 now - lgp->args.timestamp));
7561 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7563 rpc_delay(task, delay);
7564 task->tk_status = 0;
7565 rpc_restart_call_prepare(task);
7566 goto out; /* Do not call nfs4_async_handle_error() */
7569 case -NFS4ERR_EXPIRED:
7570 case -NFS4ERR_BAD_STATEID:
7571 spin_lock(&inode->i_lock);
7572 lo = NFS_I(inode)->layout;
7573 if (!lo || list_empty(&lo->plh_segs)) {
7574 spin_unlock(&inode->i_lock);
7575 /* If the open stateid was bad, then recover it. */
7576 state = lgp->args.ctx->state;
7581 * Mark the bad layout state as invalid, then retry
7582 * with the current stateid.
7584 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7585 spin_unlock(&inode->i_lock);
7586 pnfs_free_lseg_list(&head);
7588 task->tk_status = 0;
7589 rpc_restart_call_prepare(task);
7592 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7593 rpc_restart_call_prepare(task);
7595 dprintk("<-- %s\n", __func__);
7598 static size_t max_response_pages(struct nfs_server *server)
7600 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7601 return nfs_page_array_len(0, max_resp_sz);
7604 static void nfs4_free_pages(struct page **pages, size_t size)
7611 for (i = 0; i < size; i++) {
7614 __free_page(pages[i]);
7619 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7621 struct page **pages;
7624 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7626 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7630 for (i = 0; i < size; i++) {
7631 pages[i] = alloc_page(gfp_flags);
7633 dprintk("%s: failed to allocate page\n", __func__);
7634 nfs4_free_pages(pages, size);
7642 static void nfs4_layoutget_release(void *calldata)
7644 struct nfs4_layoutget *lgp = calldata;
7645 struct inode *inode = lgp->args.inode;
7646 struct nfs_server *server = NFS_SERVER(inode);
7647 size_t max_pages = max_response_pages(server);
7649 dprintk("--> %s\n", __func__);
7650 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7651 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7652 put_nfs_open_context(lgp->args.ctx);
7654 dprintk("<-- %s\n", __func__);
7657 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7658 .rpc_call_prepare = nfs4_layoutget_prepare,
7659 .rpc_call_done = nfs4_layoutget_done,
7660 .rpc_release = nfs4_layoutget_release,
7663 struct pnfs_layout_segment *
7664 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7666 struct inode *inode = lgp->args.inode;
7667 struct nfs_server *server = NFS_SERVER(inode);
7668 size_t max_pages = max_response_pages(server);
7669 struct rpc_task *task;
7670 struct rpc_message msg = {
7671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7672 .rpc_argp = &lgp->args,
7673 .rpc_resp = &lgp->res,
7674 .rpc_cred = lgp->cred,
7676 struct rpc_task_setup task_setup_data = {
7677 .rpc_client = server->client,
7678 .rpc_message = &msg,
7679 .callback_ops = &nfs4_layoutget_call_ops,
7680 .callback_data = lgp,
7681 .flags = RPC_TASK_ASYNC,
7683 struct pnfs_layout_segment *lseg = NULL;
7686 dprintk("--> %s\n", __func__);
7688 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7689 if (!lgp->args.layout.pages) {
7690 nfs4_layoutget_release(lgp);
7691 return ERR_PTR(-ENOMEM);
7693 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7694 lgp->args.timestamp = jiffies;
7696 lgp->res.layoutp = &lgp->args.layout;
7697 lgp->res.seq_res.sr_slot = NULL;
7698 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7700 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7701 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7703 task = rpc_run_task(&task_setup_data);
7705 return ERR_CAST(task);
7706 status = nfs4_wait_for_completion_rpc_task(task);
7708 status = task->tk_status;
7709 trace_nfs4_layoutget(lgp->args.ctx,
7713 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7714 if (status == 0 && lgp->res.layoutp->len)
7715 lseg = pnfs_layout_process(lgp);
7717 dprintk("<-- %s status=%d\n", __func__, status);
7719 return ERR_PTR(status);
7724 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7726 struct nfs4_layoutreturn *lrp = calldata;
7728 dprintk("--> %s\n", __func__);
7729 nfs41_setup_sequence(lrp->clp->cl_session,
7730 &lrp->args.seq_args,
7735 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7737 struct nfs4_layoutreturn *lrp = calldata;
7738 struct nfs_server *server;
7740 dprintk("--> %s\n", __func__);
7742 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7745 server = NFS_SERVER(lrp->args.inode);
7746 switch (task->tk_status) {
7748 task->tk_status = 0;
7751 case -NFS4ERR_DELAY:
7752 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7754 rpc_restart_call_prepare(task);
7757 dprintk("<-- %s\n", __func__);
7760 static void nfs4_layoutreturn_release(void *calldata)
7762 struct nfs4_layoutreturn *lrp = calldata;
7763 struct pnfs_layout_hdr *lo = lrp->args.layout;
7765 dprintk("--> %s\n", __func__);
7766 spin_lock(&lo->plh_inode->i_lock);
7767 if (lrp->res.lrs_present)
7768 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7769 lo->plh_block_lgets--;
7770 spin_unlock(&lo->plh_inode->i_lock);
7771 pnfs_put_layout_hdr(lrp->args.layout);
7773 dprintk("<-- %s\n", __func__);
7776 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7777 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7778 .rpc_call_done = nfs4_layoutreturn_done,
7779 .rpc_release = nfs4_layoutreturn_release,
7782 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7784 struct rpc_task *task;
7785 struct rpc_message msg = {
7786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7787 .rpc_argp = &lrp->args,
7788 .rpc_resp = &lrp->res,
7789 .rpc_cred = lrp->cred,
7791 struct rpc_task_setup task_setup_data = {
7792 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7793 .rpc_message = &msg,
7794 .callback_ops = &nfs4_layoutreturn_call_ops,
7795 .callback_data = lrp,
7799 dprintk("--> %s\n", __func__);
7800 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
7801 task = rpc_run_task(&task_setup_data);
7803 return PTR_ERR(task);
7804 status = task->tk_status;
7805 trace_nfs4_layoutreturn(lrp->args.inode, status);
7806 dprintk("<-- %s status=%d\n", __func__, status);
7812 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
7813 struct pnfs_device *pdev,
7814 struct rpc_cred *cred)
7816 struct nfs4_getdeviceinfo_args args = {
7819 struct nfs4_getdeviceinfo_res res = {
7822 struct rpc_message msg = {
7823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7830 dprintk("--> %s\n", __func__);
7831 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7832 dprintk("<-- %s status=%d\n", __func__, status);
7837 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7838 struct pnfs_device *pdev,
7839 struct rpc_cred *cred)
7841 struct nfs4_exception exception = { };
7845 err = nfs4_handle_exception(server,
7846 _nfs4_proc_getdeviceinfo(server, pdev, cred),
7848 } while (exception.retry);
7851 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7853 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7855 struct nfs4_layoutcommit_data *data = calldata;
7856 struct nfs_server *server = NFS_SERVER(data->args.inode);
7857 struct nfs4_session *session = nfs4_get_session(server);
7859 nfs41_setup_sequence(session,
7860 &data->args.seq_args,
7866 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7868 struct nfs4_layoutcommit_data *data = calldata;
7869 struct nfs_server *server = NFS_SERVER(data->args.inode);
7871 if (!nfs41_sequence_done(task, &data->res.seq_res))
7874 switch (task->tk_status) { /* Just ignore these failures */
7875 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7876 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7877 case -NFS4ERR_BADLAYOUT: /* no layout */
7878 case -NFS4ERR_GRACE: /* loca_recalim always false */
7879 task->tk_status = 0;
7883 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7884 rpc_restart_call_prepare(task);
7890 static void nfs4_layoutcommit_release(void *calldata)
7892 struct nfs4_layoutcommit_data *data = calldata;
7894 pnfs_cleanup_layoutcommit(data);
7895 nfs_post_op_update_inode_force_wcc(data->args.inode,
7897 put_rpccred(data->cred);
7901 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7902 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7903 .rpc_call_done = nfs4_layoutcommit_done,
7904 .rpc_release = nfs4_layoutcommit_release,
7908 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
7910 struct rpc_message msg = {
7911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7912 .rpc_argp = &data->args,
7913 .rpc_resp = &data->res,
7914 .rpc_cred = data->cred,
7916 struct rpc_task_setup task_setup_data = {
7917 .task = &data->task,
7918 .rpc_client = NFS_CLIENT(data->args.inode),
7919 .rpc_message = &msg,
7920 .callback_ops = &nfs4_layoutcommit_ops,
7921 .callback_data = data,
7922 .flags = RPC_TASK_ASYNC,
7924 struct rpc_task *task;
7927 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7928 "lbw: %llu inode %lu\n",
7929 data->task.tk_pid, sync,
7930 data->args.lastbytewritten,
7931 data->args.inode->i_ino);
7933 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7934 task = rpc_run_task(&task_setup_data);
7936 return PTR_ERR(task);
7939 status = nfs4_wait_for_completion_rpc_task(task);
7942 status = task->tk_status;
7943 trace_nfs4_layoutcommit(data->args.inode, status);
7945 dprintk("%s: status %d\n", __func__, status);
7951 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7952 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7955 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7956 struct nfs_fsinfo *info,
7957 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7959 struct nfs41_secinfo_no_name_args args = {
7960 .style = SECINFO_STYLE_CURRENT_FH,
7962 struct nfs4_secinfo_res res = {
7965 struct rpc_message msg = {
7966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7970 struct rpc_clnt *clnt = server->client;
7971 struct rpc_cred *cred = NULL;
7974 if (use_integrity) {
7975 clnt = server->nfs_client->cl_rpcclient;
7976 cred = nfs4_get_clid_cred(server->nfs_client);
7977 msg.rpc_cred = cred;
7980 dprintk("--> %s\n", __func__);
7981 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7983 dprintk("<-- %s status=%d\n", __func__, status);
7992 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7993 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7995 struct nfs4_exception exception = { };
7998 /* first try using integrity protection */
7999 err = -NFS4ERR_WRONGSEC;
8001 /* try to use integrity protection with machine cred */
8002 if (_nfs4_is_integrity_protected(server->nfs_client))
8003 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8007 * if unable to use integrity protection, or SECINFO with
8008 * integrity protection returns NFS4ERR_WRONGSEC (which is
8009 * disallowed by spec, but exists in deployed servers) use
8010 * the current filesystem's rpc_client and the user cred.
8012 if (err == -NFS4ERR_WRONGSEC)
8013 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8018 case -NFS4ERR_WRONGSEC:
8022 err = nfs4_handle_exception(server, err, &exception);
8024 } while (exception.retry);
8030 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8031 struct nfs_fsinfo *info)
8035 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8036 struct nfs4_secinfo_flavors *flavors;
8037 struct nfs4_secinfo4 *secinfo;
8040 page = alloc_page(GFP_KERNEL);
8046 flavors = page_address(page);
8047 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8050 * Fall back on "guess and check" method if
8051 * the server doesn't support SECINFO_NO_NAME
8053 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8054 err = nfs4_find_root_sec(server, fhandle, info);
8060 for (i = 0; i < flavors->num_flavors; i++) {
8061 secinfo = &flavors->flavors[i];
8063 switch (secinfo->flavor) {
8067 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8068 &secinfo->flavor_info);
8071 flavor = RPC_AUTH_MAXFLAVOR;
8075 if (!nfs_auth_info_match(&server->auth_info, flavor))
8076 flavor = RPC_AUTH_MAXFLAVOR;
8078 if (flavor != RPC_AUTH_MAXFLAVOR) {
8079 err = nfs4_lookup_root_sec(server, fhandle,
8086 if (flavor == RPC_AUTH_MAXFLAVOR)
8097 static int _nfs41_test_stateid(struct nfs_server *server,
8098 nfs4_stateid *stateid,
8099 struct rpc_cred *cred)
8102 struct nfs41_test_stateid_args args = {
8105 struct nfs41_test_stateid_res res;
8106 struct rpc_message msg = {
8107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8112 struct rpc_clnt *rpc_client = server->client;
8114 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8117 dprintk("NFS call test_stateid %p\n", stateid);
8118 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8119 nfs4_set_sequence_privileged(&args.seq_args);
8120 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8121 &args.seq_args, &res.seq_res);
8122 if (status != NFS_OK) {
8123 dprintk("NFS reply test_stateid: failed, %d\n", status);
8126 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8131 * nfs41_test_stateid - perform a TEST_STATEID operation
8133 * @server: server / transport on which to perform the operation
8134 * @stateid: state ID to test
8137 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8138 * Otherwise a negative NFS4ERR value is returned if the operation
8139 * failed or the state ID is not currently valid.
8141 static int nfs41_test_stateid(struct nfs_server *server,
8142 nfs4_stateid *stateid,
8143 struct rpc_cred *cred)
8145 struct nfs4_exception exception = { };
8148 err = _nfs41_test_stateid(server, stateid, cred);
8149 if (err != -NFS4ERR_DELAY)
8151 nfs4_handle_exception(server, err, &exception);
8152 } while (exception.retry);
8156 struct nfs_free_stateid_data {
8157 struct nfs_server *server;
8158 struct nfs41_free_stateid_args args;
8159 struct nfs41_free_stateid_res res;
8162 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8164 struct nfs_free_stateid_data *data = calldata;
8165 nfs41_setup_sequence(nfs4_get_session(data->server),
8166 &data->args.seq_args,
8171 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8173 struct nfs_free_stateid_data *data = calldata;
8175 nfs41_sequence_done(task, &data->res.seq_res);
8177 switch (task->tk_status) {
8178 case -NFS4ERR_DELAY:
8179 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8180 rpc_restart_call_prepare(task);
8184 static void nfs41_free_stateid_release(void *calldata)
8189 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8190 .rpc_call_prepare = nfs41_free_stateid_prepare,
8191 .rpc_call_done = nfs41_free_stateid_done,
8192 .rpc_release = nfs41_free_stateid_release,
8195 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8196 nfs4_stateid *stateid,
8197 struct rpc_cred *cred,
8200 struct rpc_message msg = {
8201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8204 struct rpc_task_setup task_setup = {
8205 .rpc_client = server->client,
8206 .rpc_message = &msg,
8207 .callback_ops = &nfs41_free_stateid_ops,
8208 .flags = RPC_TASK_ASYNC,
8210 struct nfs_free_stateid_data *data;
8212 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8213 &task_setup.rpc_client, &msg);
8215 dprintk("NFS call free_stateid %p\n", stateid);
8216 data = kmalloc(sizeof(*data), GFP_NOFS);
8218 return ERR_PTR(-ENOMEM);
8219 data->server = server;
8220 nfs4_stateid_copy(&data->args.stateid, stateid);
8222 task_setup.callback_data = data;
8224 msg.rpc_argp = &data->args;
8225 msg.rpc_resp = &data->res;
8226 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8228 nfs4_set_sequence_privileged(&data->args.seq_args);
8230 return rpc_run_task(&task_setup);
8234 * nfs41_free_stateid - perform a FREE_STATEID operation
8236 * @server: server / transport on which to perform the operation
8237 * @stateid: state ID to release
8240 * Returns NFS_OK if the server freed "stateid". Otherwise a
8241 * negative NFS4ERR value is returned.
8243 static int nfs41_free_stateid(struct nfs_server *server,
8244 nfs4_stateid *stateid,
8245 struct rpc_cred *cred)
8247 struct rpc_task *task;
8250 task = _nfs41_free_stateid(server, stateid, cred, true);
8252 return PTR_ERR(task);
8253 ret = rpc_wait_for_completion_task(task);
8255 ret = task->tk_status;
8261 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8263 struct rpc_task *task;
8264 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8266 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8267 nfs4_free_lock_state(server, lsp);
8273 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8274 const nfs4_stateid *s2)
8276 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8279 if (s1->seqid == s2->seqid)
8281 if (s1->seqid == 0 || s2->seqid == 0)
8287 #endif /* CONFIG_NFS_V4_1 */
8289 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8290 const nfs4_stateid *s2)
8292 return nfs4_stateid_match(s1, s2);
8296 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8297 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8298 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8299 .recover_open = nfs4_open_reclaim,
8300 .recover_lock = nfs4_lock_reclaim,
8301 .establish_clid = nfs4_init_clientid,
8302 .detect_trunking = nfs40_discover_server_trunking,
8305 #if defined(CONFIG_NFS_V4_1)
8306 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8307 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8308 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8309 .recover_open = nfs4_open_reclaim,
8310 .recover_lock = nfs4_lock_reclaim,
8311 .establish_clid = nfs41_init_clientid,
8312 .reclaim_complete = nfs41_proc_reclaim_complete,
8313 .detect_trunking = nfs41_discover_server_trunking,
8315 #endif /* CONFIG_NFS_V4_1 */
8317 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8318 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8319 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8320 .recover_open = nfs4_open_expired,
8321 .recover_lock = nfs4_lock_expired,
8322 .establish_clid = nfs4_init_clientid,
8325 #if defined(CONFIG_NFS_V4_1)
8326 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8327 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8328 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8329 .recover_open = nfs41_open_expired,
8330 .recover_lock = nfs41_lock_expired,
8331 .establish_clid = nfs41_init_clientid,
8333 #endif /* CONFIG_NFS_V4_1 */
8335 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8336 .sched_state_renewal = nfs4_proc_async_renew,
8337 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8338 .renew_lease = nfs4_proc_renew,
8341 #if defined(CONFIG_NFS_V4_1)
8342 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8343 .sched_state_renewal = nfs41_proc_async_sequence,
8344 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8345 .renew_lease = nfs4_proc_sequence,
8349 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8350 .get_locations = _nfs40_proc_get_locations,
8351 .fsid_present = _nfs40_proc_fsid_present,
8354 #if defined(CONFIG_NFS_V4_1)
8355 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8356 .get_locations = _nfs41_proc_get_locations,
8357 .fsid_present = _nfs41_proc_fsid_present,
8359 #endif /* CONFIG_NFS_V4_1 */
8361 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8363 .init_caps = NFS_CAP_READDIRPLUS
8364 | NFS_CAP_ATOMIC_OPEN
8365 | NFS_CAP_CHANGE_ATTR
8366 | NFS_CAP_POSIX_LOCK,
8367 .init_client = nfs40_init_client,
8368 .shutdown_client = nfs40_shutdown_client,
8369 .match_stateid = nfs4_match_stateid,
8370 .find_root_sec = nfs4_find_root_sec,
8371 .free_lock_state = nfs4_release_lockowner,
8372 .call_sync_ops = &nfs40_call_sync_ops,
8373 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8374 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8375 .state_renewal_ops = &nfs40_state_renewal_ops,
8376 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8379 #if defined(CONFIG_NFS_V4_1)
8380 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8382 .init_caps = NFS_CAP_READDIRPLUS
8383 | NFS_CAP_ATOMIC_OPEN
8384 | NFS_CAP_CHANGE_ATTR
8385 | NFS_CAP_POSIX_LOCK
8386 | NFS_CAP_STATEID_NFSV41
8387 | NFS_CAP_ATOMIC_OPEN_V1,
8388 .init_client = nfs41_init_client,
8389 .shutdown_client = nfs41_shutdown_client,
8390 .match_stateid = nfs41_match_stateid,
8391 .find_root_sec = nfs41_find_root_sec,
8392 .free_lock_state = nfs41_free_lock_state,
8393 .call_sync_ops = &nfs41_call_sync_ops,
8394 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8395 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8396 .state_renewal_ops = &nfs41_state_renewal_ops,
8397 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8401 #if defined(CONFIG_NFS_V4_2)
8402 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8404 .init_caps = NFS_CAP_READDIRPLUS
8405 | NFS_CAP_ATOMIC_OPEN
8406 | NFS_CAP_CHANGE_ATTR
8407 | NFS_CAP_POSIX_LOCK
8408 | NFS_CAP_STATEID_NFSV41
8409 | NFS_CAP_ATOMIC_OPEN_V1,
8410 .init_client = nfs41_init_client,
8411 .shutdown_client = nfs41_shutdown_client,
8412 .match_stateid = nfs41_match_stateid,
8413 .find_root_sec = nfs41_find_root_sec,
8414 .free_lock_state = nfs41_free_lock_state,
8415 .call_sync_ops = &nfs41_call_sync_ops,
8416 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8417 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8418 .state_renewal_ops = &nfs41_state_renewal_ops,
8422 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8423 [0] = &nfs_v4_0_minor_ops,
8424 #if defined(CONFIG_NFS_V4_1)
8425 [1] = &nfs_v4_1_minor_ops,
8427 #if defined(CONFIG_NFS_V4_2)
8428 [2] = &nfs_v4_2_minor_ops,
8432 static const struct inode_operations nfs4_dir_inode_operations = {
8433 .create = nfs_create,
8434 .lookup = nfs_lookup,
8435 .atomic_open = nfs_atomic_open,
8437 .unlink = nfs_unlink,
8438 .symlink = nfs_symlink,
8442 .rename = nfs_rename,
8443 .permission = nfs_permission,
8444 .getattr = nfs_getattr,
8445 .setattr = nfs_setattr,
8446 .getxattr = generic_getxattr,
8447 .setxattr = generic_setxattr,
8448 .listxattr = generic_listxattr,
8449 .removexattr = generic_removexattr,
8452 static const struct inode_operations nfs4_file_inode_operations = {
8453 .permission = nfs_permission,
8454 .getattr = nfs_getattr,
8455 .setattr = nfs_setattr,
8456 .getxattr = generic_getxattr,
8457 .setxattr = generic_setxattr,
8458 .listxattr = generic_listxattr,
8459 .removexattr = generic_removexattr,
8462 const struct nfs_rpc_ops nfs_v4_clientops = {
8463 .version = 4, /* protocol version */
8464 .dentry_ops = &nfs4_dentry_operations,
8465 .dir_inode_ops = &nfs4_dir_inode_operations,
8466 .file_inode_ops = &nfs4_file_inode_operations,
8467 .file_ops = &nfs4_file_operations,
8468 .getroot = nfs4_proc_get_root,
8469 .submount = nfs4_submount,
8470 .try_mount = nfs4_try_mount,
8471 .getattr = nfs4_proc_getattr,
8472 .setattr = nfs4_proc_setattr,
8473 .lookup = nfs4_proc_lookup,
8474 .access = nfs4_proc_access,
8475 .readlink = nfs4_proc_readlink,
8476 .create = nfs4_proc_create,
8477 .remove = nfs4_proc_remove,
8478 .unlink_setup = nfs4_proc_unlink_setup,
8479 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8480 .unlink_done = nfs4_proc_unlink_done,
8481 .rename_setup = nfs4_proc_rename_setup,
8482 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8483 .rename_done = nfs4_proc_rename_done,
8484 .link = nfs4_proc_link,
8485 .symlink = nfs4_proc_symlink,
8486 .mkdir = nfs4_proc_mkdir,
8487 .rmdir = nfs4_proc_remove,
8488 .readdir = nfs4_proc_readdir,
8489 .mknod = nfs4_proc_mknod,
8490 .statfs = nfs4_proc_statfs,
8491 .fsinfo = nfs4_proc_fsinfo,
8492 .pathconf = nfs4_proc_pathconf,
8493 .set_capabilities = nfs4_server_capabilities,
8494 .decode_dirent = nfs4_decode_dirent,
8495 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8496 .read_setup = nfs4_proc_read_setup,
8497 .read_done = nfs4_read_done,
8498 .write_setup = nfs4_proc_write_setup,
8499 .write_done = nfs4_write_done,
8500 .commit_setup = nfs4_proc_commit_setup,
8501 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8502 .commit_done = nfs4_commit_done,
8503 .lock = nfs4_proc_lock,
8504 .clear_acl_cache = nfs4_zap_acl_attr,
8505 .close_context = nfs4_close_context,
8506 .open_context = nfs4_atomic_open,
8507 .have_delegation = nfs4_have_delegation,
8508 .return_delegation = nfs4_inode_return_delegation,
8509 .alloc_client = nfs4_alloc_client,
8510 .init_client = nfs4_init_client,
8511 .free_client = nfs4_free_client,
8512 .create_server = nfs4_create_server,
8513 .clone_server = nfs_clone_server,
8516 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8517 .prefix = XATTR_NAME_NFSV4_ACL,
8518 .list = nfs4_xattr_list_nfs4_acl,
8519 .get = nfs4_xattr_get_nfs4_acl,
8520 .set = nfs4_xattr_set_nfs4_acl,
8523 const struct xattr_handler *nfs4_xattr_handlers[] = {
8524 &nfs4_xattr_nfs4_acl_handler,
8525 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8526 &nfs4_xattr_nfs4_label_handler,