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/file.h>
42 #include <linux/string.h>
43 #include <linux/ratelimit.h>
44 #include <linux/printk.h>
45 #include <linux/slab.h>
46 #include <linux/sunrpc/clnt.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
70 #include "nfs4trace.h"
72 #define NFSDBG_FACILITY NFSDBG_PROC
74 #define NFS4_POLL_RETRY_MIN (HZ/10)
75 #define NFS4_POLL_RETRY_MAX (15*HZ)
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
82 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
85 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
89 #ifdef CONFIG_NFS_V4_1
90 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
92 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
96 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
97 static inline struct nfs4_label *
98 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
117 nfs4_label_release_security(struct nfs4_label *label)
120 security_release_secctx(label->label, label->len);
122 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125 return server->attr_bitmask;
127 return server->attr_bitmask_nl;
130 static inline struct nfs4_label *
131 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
135 nfs4_label_release_security(struct nfs4_label *label)
138 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139 { return server->attr_bitmask; }
142 /* Prevent leaks of NFSv4 errors into userland */
143 static int nfs4_map_errors(int err)
148 case -NFS4ERR_RESOURCE:
149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
152 case -NFS4ERR_WRONGSEC:
153 case -NFS4ERR_WRONG_CRED:
155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
158 case -NFS4ERR_SHARE_DENIED:
160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
162 case -NFS4ERR_FILE_OPEN:
165 dprintk("%s could not handle NFSv4 error %d\n",
173 * This is our standard bitmap for GETATTR requests.
175 const u32 nfs4_fattr_bitmap[3] = {
177 | FATTR4_WORD0_CHANGE
180 | FATTR4_WORD0_FILEID,
182 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
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(d_inode(dentry)));
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(d_inode(dentry->d_parent)));
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
317 static long nfs4_update_delay(long *timeout)
321 return NFS4_POLL_RETRY_MAX;
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
331 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
339 if (fatal_signal_pending(current))
344 /* This is the error handling routine for processes that are allowed
347 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
349 struct nfs_client *clp = server->nfs_client;
350 struct nfs4_state *state = exception->state;
351 struct inode *inode = exception->inode;
354 exception->retry = 0;
358 case -NFS4ERR_OPENMODE:
359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
360 nfs4_inode_return_delegation(inode);
361 exception->retry = 1;
366 ret = nfs4_schedule_stateid_recovery(server, state);
369 goto wait_on_recovery;
370 case -NFS4ERR_DELEG_REVOKED:
371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
375 ret = nfs4_schedule_stateid_recovery(server, state);
378 goto wait_on_recovery;
379 case -NFS4ERR_EXPIRED:
381 ret = nfs4_schedule_stateid_recovery(server, state);
385 case -NFS4ERR_STALE_STATEID:
386 case -NFS4ERR_STALE_CLIENTID:
387 nfs4_schedule_lease_recovery(clp);
388 goto wait_on_recovery;
390 ret = nfs4_schedule_migration_recovery(server);
393 goto wait_on_recovery;
394 case -NFS4ERR_LEASE_MOVED:
395 nfs4_schedule_lease_moved_recovery(clp);
396 goto wait_on_recovery;
397 #if defined(CONFIG_NFS_V4_1)
398 case -NFS4ERR_BADSESSION:
399 case -NFS4ERR_BADSLOT:
400 case -NFS4ERR_BAD_HIGH_SLOT:
401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
402 case -NFS4ERR_DEADSESSION:
403 case -NFS4ERR_SEQ_FALSE_RETRY:
404 case -NFS4ERR_SEQ_MISORDERED:
405 dprintk("%s ERROR: %d Reset session\n", __func__,
407 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
408 goto wait_on_recovery;
409 #endif /* defined(CONFIG_NFS_V4_1) */
410 case -NFS4ERR_FILE_OPEN:
411 if (exception->timeout > HZ) {
412 /* We have retried a decent amount, time to
420 ret = nfs4_delay(server->client, &exception->timeout);
423 case -NFS4ERR_RETRY_UNCACHED_REP:
424 case -NFS4ERR_OLD_STATEID:
425 exception->retry = 1;
427 case -NFS4ERR_BADOWNER:
428 /* The following works around a Linux server bug! */
429 case -NFS4ERR_BADNAME:
430 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
431 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
432 exception->retry = 1;
433 printk(KERN_WARNING "NFS: v4 server %s "
434 "does not accept raw "
436 "Reenabling the idmapper.\n",
437 server->nfs_client->cl_hostname);
440 /* We failed to handle the error */
441 return nfs4_map_errors(ret);
443 ret = nfs4_wait_clnt_recover(clp);
444 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
447 exception->retry = 1;
452 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
453 * or 'false' otherwise.
455 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
457 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
459 if (flavor == RPC_AUTH_GSS_KRB5I ||
460 flavor == RPC_AUTH_GSS_KRB5P)
466 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
468 spin_lock(&clp->cl_lock);
469 if (time_before(clp->cl_last_renewal,timestamp))
470 clp->cl_last_renewal = timestamp;
471 spin_unlock(&clp->cl_lock);
474 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
476 do_renew_lease(server->nfs_client, timestamp);
479 struct nfs4_call_sync_data {
480 const struct nfs_server *seq_server;
481 struct nfs4_sequence_args *seq_args;
482 struct nfs4_sequence_res *seq_res;
485 static void nfs4_init_sequence(struct nfs4_sequence_args *args,
486 struct nfs4_sequence_res *res, int cache_reply)
488 args->sa_slot = NULL;
489 args->sa_cache_this = cache_reply;
490 args->sa_privileged = 0;
495 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
497 args->sa_privileged = 1;
500 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
501 struct nfs4_sequence_args *args,
502 struct nfs4_sequence_res *res,
503 struct rpc_task *task)
505 struct nfs4_slot *slot;
507 /* slot already allocated? */
508 if (res->sr_slot != NULL)
511 spin_lock(&tbl->slot_tbl_lock);
512 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
515 slot = nfs4_alloc_slot(tbl);
517 if (slot == ERR_PTR(-ENOMEM))
518 task->tk_timeout = HZ >> 2;
521 spin_unlock(&tbl->slot_tbl_lock);
523 args->sa_slot = slot;
527 rpc_call_start(task);
531 if (args->sa_privileged)
532 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
533 NULL, RPC_PRIORITY_PRIVILEGED);
535 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
536 spin_unlock(&tbl->slot_tbl_lock);
539 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
541 static int nfs40_sequence_done(struct rpc_task *task,
542 struct nfs4_sequence_res *res)
544 struct nfs4_slot *slot = res->sr_slot;
545 struct nfs4_slot_table *tbl;
551 spin_lock(&tbl->slot_tbl_lock);
552 if (!nfs41_wake_and_assign_slot(tbl, slot))
553 nfs4_free_slot(tbl, slot);
554 spin_unlock(&tbl->slot_tbl_lock);
561 #if defined(CONFIG_NFS_V4_1)
563 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
565 struct nfs4_session *session;
566 struct nfs4_slot_table *tbl;
567 struct nfs4_slot *slot = res->sr_slot;
568 bool send_new_highest_used_slotid = false;
571 session = tbl->session;
573 spin_lock(&tbl->slot_tbl_lock);
574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
580 if (nfs41_wake_and_assign_slot(tbl, slot)) {
581 send_new_highest_used_slotid = false;
584 nfs4_free_slot(tbl, slot);
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
589 spin_unlock(&tbl->slot_tbl_lock);
591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
595 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
597 struct nfs4_session *session;
598 struct nfs4_slot *slot = res->sr_slot;
599 struct nfs_client *clp;
600 bool interrupted = false;
605 /* don't increment the sequence number if the task wasn't sent */
606 if (!RPC_WAS_SENT(task))
609 session = slot->table->session;
611 if (slot->interrupted) {
612 slot->interrupted = 0;
616 trace_nfs4_sequence_done(session, res);
617 /* Check the SEQUENCE operation status */
618 switch (res->sr_status) {
620 /* Update the slot's sequence and clientid lease timer */
623 do_renew_lease(clp, res->sr_timestamp);
624 /* Check sequence flags */
625 if (res->sr_status_flags != 0)
626 nfs4_schedule_lease_recovery(clp);
627 nfs41_update_target_slotid(slot->table, slot, res);
631 * sr_status remains 1 if an RPC level error occurred.
632 * The server may or may not have processed the sequence
634 * Mark the slot as having hosted an interrupted RPC call.
636 slot->interrupted = 1;
639 /* The server detected a resend of the RPC call and
640 * returned NFS4ERR_DELAY as per Section 2.10.6.2
643 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
648 case -NFS4ERR_BADSLOT:
650 * The slot id we used was probably retired. Try again
651 * using a different slot id.
654 case -NFS4ERR_SEQ_MISORDERED:
656 * Was the last operation on this sequence interrupted?
657 * If so, retry after bumping the sequence number.
664 * Could this slot have been previously retired?
665 * If so, then the server may be expecting seq_nr = 1!
667 if (slot->seq_nr != 1) {
672 case -NFS4ERR_SEQ_FALSE_RETRY:
676 /* Just update the slot sequence no. */
680 /* The session may be reset by one of the error handlers. */
681 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
682 nfs41_sequence_free_slot(res);
686 if (rpc_restart_call_prepare(task)) {
692 if (!rpc_restart_call(task))
694 rpc_delay(task, NFS4_POLL_RETRY_MAX);
697 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
699 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
701 if (res->sr_slot == NULL)
703 if (!res->sr_slot->table->session)
704 return nfs40_sequence_done(task, res);
705 return nfs41_sequence_done(task, res);
707 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
709 int nfs41_setup_sequence(struct nfs4_session *session,
710 struct nfs4_sequence_args *args,
711 struct nfs4_sequence_res *res,
712 struct rpc_task *task)
714 struct nfs4_slot *slot;
715 struct nfs4_slot_table *tbl;
717 dprintk("--> %s\n", __func__);
718 /* slot already allocated? */
719 if (res->sr_slot != NULL)
722 tbl = &session->fc_slot_table;
724 task->tk_timeout = 0;
726 spin_lock(&tbl->slot_tbl_lock);
727 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
728 !args->sa_privileged) {
729 /* The state manager will wait until the slot table is empty */
730 dprintk("%s session is draining\n", __func__);
734 slot = nfs4_alloc_slot(tbl);
736 /* If out of memory, try again in 1/4 second */
737 if (slot == ERR_PTR(-ENOMEM))
738 task->tk_timeout = HZ >> 2;
739 dprintk("<-- %s: no free slots\n", __func__);
742 spin_unlock(&tbl->slot_tbl_lock);
744 args->sa_slot = slot;
746 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
747 slot->slot_nr, slot->seq_nr);
750 res->sr_timestamp = jiffies;
751 res->sr_status_flags = 0;
753 * sr_status is only set in decode_sequence, and so will remain
754 * set to 1 if an rpc level failure occurs.
757 trace_nfs4_setup_sequence(session, args);
759 rpc_call_start(task);
762 /* Privileged tasks are queued with top priority */
763 if (args->sa_privileged)
764 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
765 NULL, RPC_PRIORITY_PRIVILEGED);
767 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
768 spin_unlock(&tbl->slot_tbl_lock);
771 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
773 static int nfs4_setup_sequence(const struct nfs_server *server,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 struct rpc_task *task)
778 struct nfs4_session *session = nfs4_get_session(server);
782 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
785 dprintk("--> %s clp %p session %p sr_slot %u\n",
786 __func__, session->clp, session, res->sr_slot ?
787 res->sr_slot->slot_nr : NFS4_NO_SLOT);
789 ret = nfs41_setup_sequence(session, args, res, task);
791 dprintk("<-- %s status=%d\n", __func__, ret);
795 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
797 struct nfs4_call_sync_data *data = calldata;
798 struct nfs4_session *session = nfs4_get_session(data->seq_server);
800 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
802 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
805 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
807 struct nfs4_call_sync_data *data = calldata;
809 nfs41_sequence_done(task, data->seq_res);
812 static const struct rpc_call_ops nfs41_call_sync_ops = {
813 .rpc_call_prepare = nfs41_call_sync_prepare,
814 .rpc_call_done = nfs41_call_sync_done,
817 #else /* !CONFIG_NFS_V4_1 */
819 static int nfs4_setup_sequence(const struct nfs_server *server,
820 struct nfs4_sequence_args *args,
821 struct nfs4_sequence_res *res,
822 struct rpc_task *task)
824 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
828 int nfs4_sequence_done(struct rpc_task *task,
829 struct nfs4_sequence_res *res)
831 return nfs40_sequence_done(task, res);
833 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
835 #endif /* !CONFIG_NFS_V4_1 */
837 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
839 struct nfs4_call_sync_data *data = calldata;
840 nfs4_setup_sequence(data->seq_server,
841 data->seq_args, data->seq_res, task);
844 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
846 struct nfs4_call_sync_data *data = calldata;
847 nfs4_sequence_done(task, data->seq_res);
850 static const struct rpc_call_ops nfs40_call_sync_ops = {
851 .rpc_call_prepare = nfs40_call_sync_prepare,
852 .rpc_call_done = nfs40_call_sync_done,
855 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
856 struct nfs_server *server,
857 struct rpc_message *msg,
858 struct nfs4_sequence_args *args,
859 struct nfs4_sequence_res *res)
862 struct rpc_task *task;
863 struct nfs_client *clp = server->nfs_client;
864 struct nfs4_call_sync_data data = {
865 .seq_server = server,
869 struct rpc_task_setup task_setup = {
872 .callback_ops = clp->cl_mvops->call_sync_ops,
873 .callback_data = &data
876 task = rpc_run_task(&task_setup);
880 ret = task->tk_status;
886 int nfs4_call_sync(struct rpc_clnt *clnt,
887 struct nfs_server *server,
888 struct rpc_message *msg,
889 struct nfs4_sequence_args *args,
890 struct nfs4_sequence_res *res,
893 nfs4_init_sequence(args, res, cache_reply);
894 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
897 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
899 struct nfs_inode *nfsi = NFS_I(dir);
901 spin_lock(&dir->i_lock);
902 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
903 if (!cinfo->atomic || cinfo->before != dir->i_version)
904 nfs_force_lookup_revalidate(dir);
905 dir->i_version = cinfo->after;
906 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
907 nfs_fscache_invalidate(dir);
908 spin_unlock(&dir->i_lock);
911 struct nfs4_opendata {
913 struct nfs_openargs o_arg;
914 struct nfs_openres o_res;
915 struct nfs_open_confirmargs c_arg;
916 struct nfs_open_confirmres c_res;
917 struct nfs4_string owner_name;
918 struct nfs4_string group_name;
919 struct nfs_fattr f_attr;
920 struct nfs4_label *f_label;
922 struct dentry *dentry;
923 struct nfs4_state_owner *owner;
924 struct nfs4_state *state;
926 unsigned long timestamp;
927 unsigned int rpc_done : 1;
928 unsigned int file_created : 1;
929 unsigned int is_recover : 1;
934 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
935 int err, struct nfs4_exception *exception)
939 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
941 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
942 exception->retry = 1;
947 nfs4_map_atomic_open_share(struct nfs_server *server,
948 fmode_t fmode, int openflags)
952 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
954 res = NFS4_SHARE_ACCESS_READ;
957 res = NFS4_SHARE_ACCESS_WRITE;
959 case FMODE_READ|FMODE_WRITE:
960 res = NFS4_SHARE_ACCESS_BOTH;
962 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
964 /* Want no delegation if we're using O_DIRECT */
965 if (openflags & O_DIRECT)
966 res |= NFS4_SHARE_WANT_NO_DELEG;
971 static enum open_claim_type4
972 nfs4_map_atomic_open_claim(struct nfs_server *server,
973 enum open_claim_type4 claim)
975 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
980 case NFS4_OPEN_CLAIM_FH:
981 return NFS4_OPEN_CLAIM_NULL;
982 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
983 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
984 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
985 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
989 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
991 p->o_res.f_attr = &p->f_attr;
992 p->o_res.f_label = p->f_label;
993 p->o_res.seqid = p->o_arg.seqid;
994 p->c_res.seqid = p->c_arg.seqid;
995 p->o_res.server = p->o_arg.server;
996 p->o_res.access_request = p->o_arg.access;
997 nfs_fattr_init(&p->f_attr);
998 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1001 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1002 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1003 const struct iattr *attrs,
1004 struct nfs4_label *label,
1005 enum open_claim_type4 claim,
1008 struct dentry *parent = dget_parent(dentry);
1009 struct inode *dir = d_inode(parent);
1010 struct nfs_server *server = NFS_SERVER(dir);
1011 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1012 struct nfs4_opendata *p;
1014 p = kzalloc(sizeof(*p), gfp_mask);
1018 p->f_label = nfs4_label_alloc(server, gfp_mask);
1019 if (IS_ERR(p->f_label))
1022 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1023 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1024 if (IS_ERR(p->o_arg.seqid))
1025 goto err_free_label;
1026 nfs_sb_active(dentry->d_sb);
1027 p->dentry = dget(dentry);
1030 atomic_inc(&sp->so_count);
1031 p->o_arg.open_flags = flags;
1032 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1033 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1036 * will return permission denied for all bits until close */
1037 if (!(flags & O_EXCL)) {
1038 /* ask server to check for all possible rights as results
1040 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1041 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1043 p->o_arg.clientid = server->nfs_client->cl_clientid;
1044 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1045 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1046 p->o_arg.name = &dentry->d_name;
1047 p->o_arg.server = server;
1048 p->o_arg.bitmask = nfs4_bitmask(server, label);
1049 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1050 p->o_arg.label = label;
1051 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1052 switch (p->o_arg.claim) {
1053 case NFS4_OPEN_CLAIM_NULL:
1054 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1055 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1056 p->o_arg.fh = NFS_FH(dir);
1058 case NFS4_OPEN_CLAIM_PREVIOUS:
1059 case NFS4_OPEN_CLAIM_FH:
1060 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1062 p->o_arg.fh = NFS_FH(d_inode(dentry));
1064 if (attrs != NULL && attrs->ia_valid != 0) {
1067 p->o_arg.u.attrs = &p->attrs;
1068 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1071 verf[1] = current->pid;
1072 memcpy(p->o_arg.u.verifier.data, verf,
1073 sizeof(p->o_arg.u.verifier.data));
1075 p->c_arg.fh = &p->o_res.fh;
1076 p->c_arg.stateid = &p->o_res.stateid;
1077 p->c_arg.seqid = p->o_arg.seqid;
1078 nfs4_init_opendata_res(p);
1079 kref_init(&p->kref);
1083 nfs4_label_free(p->f_label);
1091 static void nfs4_opendata_free(struct kref *kref)
1093 struct nfs4_opendata *p = container_of(kref,
1094 struct nfs4_opendata, kref);
1095 struct super_block *sb = p->dentry->d_sb;
1097 nfs_free_seqid(p->o_arg.seqid);
1098 if (p->state != NULL)
1099 nfs4_put_open_state(p->state);
1100 nfs4_put_state_owner(p->owner);
1102 nfs4_label_free(p->f_label);
1106 nfs_sb_deactive(sb);
1107 nfs_fattr_free_names(&p->f_attr);
1108 kfree(p->f_attr.mdsthreshold);
1112 static void nfs4_opendata_put(struct nfs4_opendata *p)
1115 kref_put(&p->kref, nfs4_opendata_free);
1118 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1122 ret = rpc_wait_for_completion_task(task);
1126 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1130 if (open_mode & (O_EXCL|O_TRUNC))
1132 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1134 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1135 && state->n_rdonly != 0;
1138 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1139 && state->n_wronly != 0;
1141 case FMODE_READ|FMODE_WRITE:
1142 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1143 && state->n_rdwr != 0;
1149 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1151 if (delegation == NULL)
1153 if ((delegation->type & fmode) != fmode)
1155 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1157 nfs_mark_delegation_referenced(delegation);
1161 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1170 case FMODE_READ|FMODE_WRITE:
1173 nfs4_state_set_mode_locked(state, state->state | fmode);
1176 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1178 struct nfs_client *clp = state->owner->so_server->nfs_client;
1179 bool need_recover = false;
1181 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1182 need_recover = true;
1183 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1184 need_recover = true;
1185 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1186 need_recover = true;
1188 nfs4_state_mark_reclaim_nograce(clp, state);
1191 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1192 nfs4_stateid *stateid)
1194 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1196 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1197 nfs_test_and_clear_all_open_stateid(state);
1200 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1205 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1207 if (state->n_wronly)
1208 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1209 if (state->n_rdonly)
1210 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1216 nfs4_stateid *stateid, fmode_t fmode)
1218 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1219 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1221 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1224 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1227 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1229 clear_bit(NFS_OPEN_STATE, &state->flags);
1231 if (stateid == NULL)
1233 /* Handle races with OPEN */
1234 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1235 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1236 nfs_resync_open_stateid_locked(state);
1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1240 nfs4_stateid_copy(&state->stateid, stateid);
1241 nfs4_stateid_copy(&state->open_stateid, stateid);
1244 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1246 write_seqlock(&state->seqlock);
1247 nfs_clear_open_stateid_locked(state, stateid, fmode);
1248 write_sequnlock(&state->seqlock);
1249 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1250 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1253 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1257 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1260 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1262 case FMODE_READ|FMODE_WRITE:
1263 set_bit(NFS_O_RDWR_STATE, &state->flags);
1265 if (!nfs_need_update_open_stateid(state, stateid))
1267 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1268 nfs4_stateid_copy(&state->stateid, stateid);
1269 nfs4_stateid_copy(&state->open_stateid, stateid);
1272 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1275 * Protect the call to nfs4_state_set_mode_locked and
1276 * serialise the stateid update
1278 write_seqlock(&state->seqlock);
1279 if (deleg_stateid != NULL) {
1280 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1281 set_bit(NFS_DELEGATED_STATE, &state->flags);
1283 if (open_stateid != NULL)
1284 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1285 write_sequnlock(&state->seqlock);
1286 spin_lock(&state->owner->so_lock);
1287 update_open_stateflags(state, fmode);
1288 spin_unlock(&state->owner->so_lock);
1291 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1293 struct nfs_inode *nfsi = NFS_I(state->inode);
1294 struct nfs_delegation *deleg_cur;
1297 fmode &= (FMODE_READ|FMODE_WRITE);
1300 deleg_cur = rcu_dereference(nfsi->delegation);
1301 if (deleg_cur == NULL)
1304 spin_lock(&deleg_cur->lock);
1305 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1306 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1307 (deleg_cur->type & fmode) != fmode)
1308 goto no_delegation_unlock;
1310 if (delegation == NULL)
1311 delegation = &deleg_cur->stateid;
1312 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1313 goto no_delegation_unlock;
1315 nfs_mark_delegation_referenced(deleg_cur);
1316 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1318 no_delegation_unlock:
1319 spin_unlock(&deleg_cur->lock);
1323 if (!ret && open_stateid != NULL) {
1324 __update_open_stateid(state, open_stateid, NULL, fmode);
1327 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1328 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1333 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1334 const nfs4_stateid *stateid)
1336 struct nfs4_state *state = lsp->ls_state;
1339 spin_lock(&state->state_lock);
1340 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1342 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1344 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1347 spin_unlock(&state->state_lock);
1351 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1353 struct nfs_delegation *delegation;
1356 delegation = rcu_dereference(NFS_I(inode)->delegation);
1357 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1362 nfs4_inode_return_delegation(inode);
1365 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1367 struct nfs4_state *state = opendata->state;
1368 struct nfs_inode *nfsi = NFS_I(state->inode);
1369 struct nfs_delegation *delegation;
1370 int open_mode = opendata->o_arg.open_flags;
1371 fmode_t fmode = opendata->o_arg.fmode;
1372 nfs4_stateid stateid;
1376 spin_lock(&state->owner->so_lock);
1377 if (can_open_cached(state, fmode, open_mode)) {
1378 update_open_stateflags(state, fmode);
1379 spin_unlock(&state->owner->so_lock);
1380 goto out_return_state;
1382 spin_unlock(&state->owner->so_lock);
1384 delegation = rcu_dereference(nfsi->delegation);
1385 if (!can_open_delegated(delegation, fmode)) {
1389 /* Save the delegation */
1390 nfs4_stateid_copy(&stateid, &delegation->stateid);
1392 nfs_release_seqid(opendata->o_arg.seqid);
1393 if (!opendata->is_recover) {
1394 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1400 /* Try to update the stateid using the delegation */
1401 if (update_open_stateid(state, NULL, &stateid, fmode))
1402 goto out_return_state;
1405 return ERR_PTR(ret);
1407 atomic_inc(&state->count);
1412 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1414 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1415 struct nfs_delegation *delegation;
1416 int delegation_flags = 0;
1419 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1421 delegation_flags = delegation->flags;
1423 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1424 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1425 "returning a delegation for "
1426 "OPEN(CLAIM_DELEGATE_CUR)\n",
1428 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1429 nfs_inode_set_delegation(state->inode,
1430 data->owner->so_cred,
1433 nfs_inode_reclaim_delegation(state->inode,
1434 data->owner->so_cred,
1439 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1440 * and update the nfs4_state.
1442 static struct nfs4_state *
1443 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1445 struct inode *inode = data->state->inode;
1446 struct nfs4_state *state = data->state;
1449 if (!data->rpc_done) {
1450 if (data->rpc_status) {
1451 ret = data->rpc_status;
1454 /* cached opens have already been processed */
1458 ret = nfs_refresh_inode(inode, &data->f_attr);
1462 if (data->o_res.delegation_type != 0)
1463 nfs4_opendata_check_deleg(data, state);
1465 update_open_stateid(state, &data->o_res.stateid, NULL,
1467 atomic_inc(&state->count);
1471 return ERR_PTR(ret);
1475 static struct nfs4_state *
1476 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1478 struct inode *inode;
1479 struct nfs4_state *state = NULL;
1482 if (!data->rpc_done) {
1483 state = nfs4_try_open_cached(data);
1488 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1490 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1491 ret = PTR_ERR(inode);
1495 state = nfs4_get_open_state(inode, data->owner);
1498 if (data->o_res.delegation_type != 0)
1499 nfs4_opendata_check_deleg(data, state);
1500 update_open_stateid(state, &data->o_res.stateid, NULL,
1504 nfs_release_seqid(data->o_arg.seqid);
1509 return ERR_PTR(ret);
1512 static struct nfs4_state *
1513 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1515 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1516 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1517 return _nfs4_opendata_to_nfs4_state(data);
1520 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1522 struct nfs_inode *nfsi = NFS_I(state->inode);
1523 struct nfs_open_context *ctx;
1525 spin_lock(&state->inode->i_lock);
1526 list_for_each_entry(ctx, &nfsi->open_files, list) {
1527 if (ctx->state != state)
1529 get_nfs_open_context(ctx);
1530 spin_unlock(&state->inode->i_lock);
1533 spin_unlock(&state->inode->i_lock);
1534 return ERR_PTR(-ENOENT);
1537 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1538 struct nfs4_state *state, enum open_claim_type4 claim)
1540 struct nfs4_opendata *opendata;
1542 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1543 NULL, NULL, claim, GFP_NOFS);
1544 if (opendata == NULL)
1545 return ERR_PTR(-ENOMEM);
1546 opendata->state = state;
1547 atomic_inc(&state->count);
1551 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1553 struct nfs4_state *newstate;
1556 opendata->o_arg.open_flags = 0;
1557 opendata->o_arg.fmode = fmode;
1558 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1559 NFS_SB(opendata->dentry->d_sb),
1561 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1562 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1563 nfs4_init_opendata_res(opendata);
1564 ret = _nfs4_recover_proc_open(opendata);
1567 newstate = nfs4_opendata_to_nfs4_state(opendata);
1568 if (IS_ERR(newstate))
1569 return PTR_ERR(newstate);
1570 nfs4_close_state(newstate, fmode);
1575 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1577 struct nfs4_state *newstate;
1580 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1581 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1582 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1583 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1584 /* memory barrier prior to reading state->n_* */
1585 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1586 clear_bit(NFS_OPEN_STATE, &state->flags);
1588 if (state->n_rdwr != 0) {
1589 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1592 if (newstate != state)
1595 if (state->n_wronly != 0) {
1596 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1599 if (newstate != state)
1602 if (state->n_rdonly != 0) {
1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1606 if (newstate != state)
1610 * We may have performed cached opens for all three recoveries.
1611 * Check if we need to update the current stateid.
1613 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1614 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1615 write_seqlock(&state->seqlock);
1616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1617 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1618 write_sequnlock(&state->seqlock);
1625 * reclaim state on the server after a reboot.
1627 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1629 struct nfs_delegation *delegation;
1630 struct nfs4_opendata *opendata;
1631 fmode_t delegation_type = 0;
1634 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1635 NFS4_OPEN_CLAIM_PREVIOUS);
1636 if (IS_ERR(opendata))
1637 return PTR_ERR(opendata);
1639 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1640 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1641 delegation_type = delegation->type;
1643 opendata->o_arg.u.delegation_type = delegation_type;
1644 status = nfs4_open_recover(opendata, state);
1645 nfs4_opendata_put(opendata);
1649 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1651 struct nfs_server *server = NFS_SERVER(state->inode);
1652 struct nfs4_exception exception = { };
1655 err = _nfs4_do_open_reclaim(ctx, state);
1656 trace_nfs4_open_reclaim(ctx, 0, err);
1657 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1659 if (err != -NFS4ERR_DELAY)
1661 nfs4_handle_exception(server, err, &exception);
1662 } while (exception.retry);
1666 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1668 struct nfs_open_context *ctx;
1671 ctx = nfs4_state_find_open_context(state);
1674 ret = nfs4_do_open_reclaim(ctx, state);
1675 put_nfs_open_context(ctx);
1679 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1683 printk(KERN_ERR "NFS: %s: unhandled error "
1684 "%d.\n", __func__, err);
1689 case -NFS4ERR_BADSESSION:
1690 case -NFS4ERR_BADSLOT:
1691 case -NFS4ERR_BAD_HIGH_SLOT:
1692 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1693 case -NFS4ERR_DEADSESSION:
1694 set_bit(NFS_DELEGATED_STATE, &state->flags);
1695 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1697 case -NFS4ERR_STALE_CLIENTID:
1698 case -NFS4ERR_STALE_STATEID:
1699 set_bit(NFS_DELEGATED_STATE, &state->flags);
1700 case -NFS4ERR_EXPIRED:
1701 /* Don't recall a delegation if it was lost */
1702 nfs4_schedule_lease_recovery(server->nfs_client);
1704 case -NFS4ERR_MOVED:
1705 nfs4_schedule_migration_recovery(server);
1707 case -NFS4ERR_LEASE_MOVED:
1708 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1710 case -NFS4ERR_DELEG_REVOKED:
1711 case -NFS4ERR_ADMIN_REVOKED:
1712 case -NFS4ERR_BAD_STATEID:
1713 case -NFS4ERR_OPENMODE:
1714 nfs_inode_find_state_and_recover(state->inode,
1716 nfs4_schedule_stateid_recovery(server, state);
1718 case -NFS4ERR_DELAY:
1719 case -NFS4ERR_GRACE:
1720 set_bit(NFS_DELEGATED_STATE, &state->flags);
1724 case -NFS4ERR_DENIED:
1725 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1731 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1733 struct nfs_server *server = NFS_SERVER(state->inode);
1734 struct nfs4_opendata *opendata;
1737 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1738 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1739 if (IS_ERR(opendata))
1740 return PTR_ERR(opendata);
1741 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1742 err = nfs4_open_recover(opendata, state);
1743 nfs4_opendata_put(opendata);
1744 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1747 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1749 struct nfs4_opendata *data = calldata;
1751 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1752 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1755 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1757 struct nfs4_opendata *data = calldata;
1759 nfs40_sequence_done(task, &data->c_res.seq_res);
1761 data->rpc_status = task->tk_status;
1762 if (data->rpc_status == 0) {
1763 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1764 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1765 renew_lease(data->o_res.server, data->timestamp);
1770 static void nfs4_open_confirm_release(void *calldata)
1772 struct nfs4_opendata *data = calldata;
1773 struct nfs4_state *state = NULL;
1775 /* If this request hasn't been cancelled, do nothing */
1776 if (data->cancelled == 0)
1778 /* In case of error, no cleanup! */
1779 if (!data->rpc_done)
1781 state = nfs4_opendata_to_nfs4_state(data);
1783 nfs4_close_state(state, data->o_arg.fmode);
1785 nfs4_opendata_put(data);
1788 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1789 .rpc_call_prepare = nfs4_open_confirm_prepare,
1790 .rpc_call_done = nfs4_open_confirm_done,
1791 .rpc_release = nfs4_open_confirm_release,
1795 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1797 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1799 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1800 struct rpc_task *task;
1801 struct rpc_message msg = {
1802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1803 .rpc_argp = &data->c_arg,
1804 .rpc_resp = &data->c_res,
1805 .rpc_cred = data->owner->so_cred,
1807 struct rpc_task_setup task_setup_data = {
1808 .rpc_client = server->client,
1809 .rpc_message = &msg,
1810 .callback_ops = &nfs4_open_confirm_ops,
1811 .callback_data = data,
1812 .workqueue = nfsiod_workqueue,
1813 .flags = RPC_TASK_ASYNC,
1817 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1818 kref_get(&data->kref);
1820 data->rpc_status = 0;
1821 data->timestamp = jiffies;
1822 task = rpc_run_task(&task_setup_data);
1824 return PTR_ERR(task);
1825 status = nfs4_wait_for_completion_rpc_task(task);
1827 data->cancelled = 1;
1830 status = data->rpc_status;
1835 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1837 struct nfs4_opendata *data = calldata;
1838 struct nfs4_state_owner *sp = data->owner;
1839 struct nfs_client *clp = sp->so_server->nfs_client;
1841 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1844 * Check if we still need to send an OPEN call, or if we can use
1845 * a delegation instead.
1847 if (data->state != NULL) {
1848 struct nfs_delegation *delegation;
1850 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1853 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1854 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1855 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
1856 can_open_delegated(delegation, data->o_arg.fmode))
1857 goto unlock_no_action;
1860 /* Update client id. */
1861 data->o_arg.clientid = clp->cl_clientid;
1862 switch (data->o_arg.claim) {
1863 case NFS4_OPEN_CLAIM_PREVIOUS:
1864 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1865 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1866 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1867 case NFS4_OPEN_CLAIM_FH:
1868 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1869 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1871 data->timestamp = jiffies;
1872 if (nfs4_setup_sequence(data->o_arg.server,
1873 &data->o_arg.seq_args,
1874 &data->o_res.seq_res,
1876 nfs_release_seqid(data->o_arg.seqid);
1878 /* Set the create mode (note dependency on the session type) */
1879 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1880 if (data->o_arg.open_flags & O_EXCL) {
1881 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1882 if (nfs4_has_persistent_session(clp))
1883 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1884 else if (clp->cl_mvops->minor_version > 0)
1885 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1891 task->tk_action = NULL;
1893 nfs4_sequence_done(task, &data->o_res.seq_res);
1896 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1898 struct nfs4_opendata *data = calldata;
1900 data->rpc_status = task->tk_status;
1902 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1905 if (task->tk_status == 0) {
1906 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1907 switch (data->o_res.f_attr->mode & S_IFMT) {
1911 data->rpc_status = -ELOOP;
1914 data->rpc_status = -EISDIR;
1917 data->rpc_status = -ENOTDIR;
1920 renew_lease(data->o_res.server, data->timestamp);
1921 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1922 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1927 static void nfs4_open_release(void *calldata)
1929 struct nfs4_opendata *data = calldata;
1930 struct nfs4_state *state = NULL;
1932 /* If this request hasn't been cancelled, do nothing */
1933 if (data->cancelled == 0)
1935 /* In case of error, no cleanup! */
1936 if (data->rpc_status != 0 || !data->rpc_done)
1938 /* In case we need an open_confirm, no cleanup! */
1939 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1941 state = nfs4_opendata_to_nfs4_state(data);
1943 nfs4_close_state(state, data->o_arg.fmode);
1945 nfs4_opendata_put(data);
1948 static const struct rpc_call_ops nfs4_open_ops = {
1949 .rpc_call_prepare = nfs4_open_prepare,
1950 .rpc_call_done = nfs4_open_done,
1951 .rpc_release = nfs4_open_release,
1954 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1956 struct inode *dir = d_inode(data->dir);
1957 struct nfs_server *server = NFS_SERVER(dir);
1958 struct nfs_openargs *o_arg = &data->o_arg;
1959 struct nfs_openres *o_res = &data->o_res;
1960 struct rpc_task *task;
1961 struct rpc_message msg = {
1962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1965 .rpc_cred = data->owner->so_cred,
1967 struct rpc_task_setup task_setup_data = {
1968 .rpc_client = server->client,
1969 .rpc_message = &msg,
1970 .callback_ops = &nfs4_open_ops,
1971 .callback_data = data,
1972 .workqueue = nfsiod_workqueue,
1973 .flags = RPC_TASK_ASYNC,
1977 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1978 kref_get(&data->kref);
1980 data->rpc_status = 0;
1981 data->cancelled = 0;
1982 data->is_recover = 0;
1984 nfs4_set_sequence_privileged(&o_arg->seq_args);
1985 data->is_recover = 1;
1987 task = rpc_run_task(&task_setup_data);
1989 return PTR_ERR(task);
1990 status = nfs4_wait_for_completion_rpc_task(task);
1992 data->cancelled = 1;
1995 status = data->rpc_status;
2001 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2003 struct inode *dir = d_inode(data->dir);
2004 struct nfs_openres *o_res = &data->o_res;
2007 status = nfs4_run_open_task(data, 1);
2008 if (status != 0 || !data->rpc_done)
2011 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2013 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2014 status = _nfs4_proc_open_confirm(data);
2023 * Additional permission checks in order to distinguish between an
2024 * open for read, and an open for execute. This works around the
2025 * fact that NFSv4 OPEN treats read and execute permissions as being
2027 * Note that in the non-execute case, we want to turn off permission
2028 * checking if we just created a new file (POSIX open() semantics).
2030 static int nfs4_opendata_access(struct rpc_cred *cred,
2031 struct nfs4_opendata *opendata,
2032 struct nfs4_state *state, fmode_t fmode,
2035 struct nfs_access_entry cache;
2038 /* access call failed or for some reason the server doesn't
2039 * support any access modes -- defer access call until later */
2040 if (opendata->o_res.access_supported == 0)
2045 * Use openflags to check for exec, because fmode won't
2046 * always have FMODE_EXEC set when file open for exec.
2048 if (openflags & __FMODE_EXEC) {
2049 /* ONLY check for exec rights */
2051 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2055 cache.jiffies = jiffies;
2056 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2057 nfs_access_add_cache(state->inode, &cache);
2059 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2062 /* even though OPEN succeeded, access is denied. Close the file */
2063 nfs4_close_state(state, fmode);
2068 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2070 static int _nfs4_proc_open(struct nfs4_opendata *data)
2072 struct inode *dir = d_inode(data->dir);
2073 struct nfs_server *server = NFS_SERVER(dir);
2074 struct nfs_openargs *o_arg = &data->o_arg;
2075 struct nfs_openres *o_res = &data->o_res;
2078 status = nfs4_run_open_task(data, 0);
2079 if (!data->rpc_done)
2082 if (status == -NFS4ERR_BADNAME &&
2083 !(o_arg->open_flags & O_CREAT))
2088 nfs_fattr_map_and_free_names(server, &data->f_attr);
2090 if (o_arg->open_flags & O_CREAT) {
2091 update_changeattr(dir, &o_res->cinfo);
2092 if (o_arg->open_flags & O_EXCL)
2093 data->file_created = 1;
2094 else if (o_res->cinfo.before != o_res->cinfo.after)
2095 data->file_created = 1;
2097 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2098 server->caps &= ~NFS_CAP_POSIX_LOCK;
2099 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2100 status = _nfs4_proc_open_confirm(data);
2104 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2105 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2109 static int nfs4_recover_expired_lease(struct nfs_server *server)
2111 return nfs4_client_recover_expired_lease(server->nfs_client);
2116 * reclaim state on the server after a network partition.
2117 * Assumes caller holds the appropriate lock
2119 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2121 struct nfs4_opendata *opendata;
2124 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2125 NFS4_OPEN_CLAIM_FH);
2126 if (IS_ERR(opendata))
2127 return PTR_ERR(opendata);
2128 ret = nfs4_open_recover(opendata, state);
2130 d_drop(ctx->dentry);
2131 nfs4_opendata_put(opendata);
2135 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2137 struct nfs_server *server = NFS_SERVER(state->inode);
2138 struct nfs4_exception exception = { };
2142 err = _nfs4_open_expired(ctx, state);
2143 trace_nfs4_open_expired(ctx, 0, err);
2144 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2149 case -NFS4ERR_GRACE:
2150 case -NFS4ERR_DELAY:
2151 nfs4_handle_exception(server, err, &exception);
2154 } while (exception.retry);
2159 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2161 struct nfs_open_context *ctx;
2164 ctx = nfs4_state_find_open_context(state);
2167 ret = nfs4_do_open_expired(ctx, state);
2168 put_nfs_open_context(ctx);
2172 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2174 nfs_remove_bad_delegation(state->inode);
2175 write_seqlock(&state->seqlock);
2176 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2177 write_sequnlock(&state->seqlock);
2178 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2181 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2183 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2184 nfs_finish_clear_delegation_stateid(state);
2187 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2189 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2190 nfs40_clear_delegation_stateid(state);
2191 return nfs4_open_expired(sp, state);
2194 #if defined(CONFIG_NFS_V4_1)
2195 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2197 struct nfs_server *server = NFS_SERVER(state->inode);
2198 nfs4_stateid stateid;
2199 struct nfs_delegation *delegation;
2200 struct rpc_cred *cred;
2203 /* Get the delegation credential for use by test/free_stateid */
2205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2206 if (delegation == NULL) {
2211 nfs4_stateid_copy(&stateid, &delegation->stateid);
2212 cred = get_rpccred(delegation->cred);
2214 status = nfs41_test_stateid(server, &stateid, cred);
2215 trace_nfs4_test_delegation_stateid(state, NULL, status);
2217 if (status != NFS_OK) {
2218 /* Free the stateid unless the server explicitly
2219 * informs us the stateid is unrecognized. */
2220 if (status != -NFS4ERR_BAD_STATEID)
2221 nfs41_free_stateid(server, &stateid, cred);
2222 nfs_finish_clear_delegation_stateid(state);
2229 * nfs41_check_open_stateid - possibly free an open stateid
2231 * @state: NFSv4 state for an inode
2233 * Returns NFS_OK if recovery for this stateid is now finished.
2234 * Otherwise a negative NFS4ERR value is returned.
2236 static int nfs41_check_open_stateid(struct nfs4_state *state)
2238 struct nfs_server *server = NFS_SERVER(state->inode);
2239 nfs4_stateid *stateid = &state->open_stateid;
2240 struct rpc_cred *cred = state->owner->so_cred;
2243 /* If a state reset has been done, test_stateid is unneeded */
2244 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2245 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2246 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2247 return -NFS4ERR_BAD_STATEID;
2249 status = nfs41_test_stateid(server, stateid, cred);
2250 trace_nfs4_test_open_stateid(state, NULL, status);
2251 if (status != NFS_OK) {
2252 /* Free the stateid unless the server explicitly
2253 * informs us the stateid is unrecognized. */
2254 if (status != -NFS4ERR_BAD_STATEID)
2255 nfs41_free_stateid(server, stateid, cred);
2257 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2259 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2260 clear_bit(NFS_OPEN_STATE, &state->flags);
2265 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2269 nfs41_check_delegation_stateid(state);
2270 status = nfs41_check_open_stateid(state);
2271 if (status != NFS_OK)
2272 status = nfs4_open_expired(sp, state);
2278 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2279 * fields corresponding to attributes that were used to store the verifier.
2280 * Make sure we clobber those fields in the later setattr call
2282 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2284 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2285 !(sattr->ia_valid & ATTR_ATIME_SET))
2286 sattr->ia_valid |= ATTR_ATIME;
2288 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2289 !(sattr->ia_valid & ATTR_MTIME_SET))
2290 sattr->ia_valid |= ATTR_MTIME;
2293 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2296 struct nfs_open_context *ctx)
2298 struct nfs4_state_owner *sp = opendata->owner;
2299 struct nfs_server *server = sp->so_server;
2300 struct dentry *dentry;
2301 struct nfs4_state *state;
2305 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2307 ret = _nfs4_proc_open(opendata);
2311 state = nfs4_opendata_to_nfs4_state(opendata);
2312 ret = PTR_ERR(state);
2315 if (server->caps & NFS_CAP_POSIX_LOCK)
2316 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2318 dentry = opendata->dentry;
2319 if (d_really_is_negative(dentry)) {
2320 /* FIXME: Is this d_drop() ever needed? */
2322 dentry = d_add_unique(dentry, igrab(state->inode));
2323 if (dentry == NULL) {
2324 dentry = opendata->dentry;
2325 } else if (dentry != ctx->dentry) {
2327 ctx->dentry = dget(dentry);
2329 nfs_set_verifier(dentry,
2330 nfs_save_change_attribute(d_inode(opendata->dir)));
2333 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2338 if (d_inode(dentry) == state->inode) {
2339 nfs_inode_attach_open_context(ctx);
2340 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2341 nfs4_schedule_stateid_recovery(server, state);
2348 * Returns a referenced nfs4_state
2350 static int _nfs4_do_open(struct inode *dir,
2351 struct nfs_open_context *ctx,
2353 struct iattr *sattr,
2354 struct nfs4_label *label,
2357 struct nfs4_state_owner *sp;
2358 struct nfs4_state *state = NULL;
2359 struct nfs_server *server = NFS_SERVER(dir);
2360 struct nfs4_opendata *opendata;
2361 struct dentry *dentry = ctx->dentry;
2362 struct rpc_cred *cred = ctx->cred;
2363 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2364 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2365 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2366 struct nfs4_label *olabel = NULL;
2369 /* Protect against reboot recovery conflicts */
2371 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2373 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2376 status = nfs4_recover_expired_lease(server);
2378 goto err_put_state_owner;
2379 if (d_really_is_positive(dentry))
2380 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2382 if (d_really_is_positive(dentry))
2383 claim = NFS4_OPEN_CLAIM_FH;
2384 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2385 label, claim, GFP_KERNEL);
2386 if (opendata == NULL)
2387 goto err_put_state_owner;
2390 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2391 if (IS_ERR(olabel)) {
2392 status = PTR_ERR(olabel);
2393 goto err_opendata_put;
2397 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2398 if (!opendata->f_attr.mdsthreshold) {
2399 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2400 if (!opendata->f_attr.mdsthreshold)
2401 goto err_free_label;
2403 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2405 if (d_really_is_positive(dentry))
2406 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2408 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2410 goto err_free_label;
2413 if ((opendata->o_arg.open_flags & O_EXCL) &&
2414 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2415 nfs4_exclusive_attrset(opendata, sattr);
2417 nfs_fattr_init(opendata->o_res.f_attr);
2418 status = nfs4_do_setattr(state->inode, cred,
2419 opendata->o_res.f_attr, sattr,
2420 state, label, olabel);
2422 nfs_setattr_update_inode(state->inode, sattr,
2423 opendata->o_res.f_attr);
2424 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2427 if (opendata->file_created)
2428 *opened |= FILE_CREATED;
2430 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2431 *ctx_th = opendata->f_attr.mdsthreshold;
2432 opendata->f_attr.mdsthreshold = NULL;
2435 nfs4_label_free(olabel);
2437 nfs4_opendata_put(opendata);
2438 nfs4_put_state_owner(sp);
2441 nfs4_label_free(olabel);
2443 nfs4_opendata_put(opendata);
2444 err_put_state_owner:
2445 nfs4_put_state_owner(sp);
2451 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2452 struct nfs_open_context *ctx,
2454 struct iattr *sattr,
2455 struct nfs4_label *label,
2458 struct nfs_server *server = NFS_SERVER(dir);
2459 struct nfs4_exception exception = { };
2460 struct nfs4_state *res;
2464 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2466 trace_nfs4_open_file(ctx, flags, status);
2469 /* NOTE: BAD_SEQID means the server and client disagree about the
2470 * book-keeping w.r.t. state-changing operations
2471 * (OPEN/CLOSE/LOCK/LOCKU...)
2472 * It is actually a sign of a bug on the client or on the server.
2474 * If we receive a BAD_SEQID error in the particular case of
2475 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2476 * have unhashed the old state_owner for us, and that we can
2477 * therefore safely retry using a new one. We should still warn
2478 * the user though...
2480 if (status == -NFS4ERR_BAD_SEQID) {
2481 pr_warn_ratelimited("NFS: v4 server %s "
2482 " returned a bad sequence-id error!\n",
2483 NFS_SERVER(dir)->nfs_client->cl_hostname);
2484 exception.retry = 1;
2488 * BAD_STATEID on OPEN means that the server cancelled our
2489 * state before it received the OPEN_CONFIRM.
2490 * Recover by retrying the request as per the discussion
2491 * on Page 181 of RFC3530.
2493 if (status == -NFS4ERR_BAD_STATEID) {
2494 exception.retry = 1;
2497 if (status == -EAGAIN) {
2498 /* We must have found a delegation */
2499 exception.retry = 1;
2502 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2504 res = ERR_PTR(nfs4_handle_exception(server,
2505 status, &exception));
2506 } while (exception.retry);
2510 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2511 struct nfs_fattr *fattr, struct iattr *sattr,
2512 struct nfs4_state *state, struct nfs4_label *ilabel,
2513 struct nfs4_label *olabel)
2515 struct nfs_server *server = NFS_SERVER(inode);
2516 struct nfs_setattrargs arg = {
2517 .fh = NFS_FH(inode),
2520 .bitmask = server->attr_bitmask,
2523 struct nfs_setattrres res = {
2528 struct rpc_message msg = {
2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2534 unsigned long timestamp = jiffies;
2539 arg.bitmask = nfs4_bitmask(server, ilabel);
2541 arg.bitmask = nfs4_bitmask(server, olabel);
2543 nfs_fattr_init(fattr);
2545 /* Servers should only apply open mode checks for file size changes */
2546 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2547 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2549 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2550 /* Use that stateid */
2551 } else if (truncate && state != NULL) {
2552 struct nfs_lockowner lockowner = {
2553 .l_owner = current->files,
2554 .l_pid = current->tgid,
2556 if (!nfs4_valid_open_stateid(state))
2558 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2559 &lockowner) == -EIO)
2562 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2564 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2565 if (status == 0 && state != NULL)
2566 renew_lease(server, timestamp);
2570 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2571 struct nfs_fattr *fattr, struct iattr *sattr,
2572 struct nfs4_state *state, struct nfs4_label *ilabel,
2573 struct nfs4_label *olabel)
2575 struct nfs_server *server = NFS_SERVER(inode);
2576 struct nfs4_exception exception = {
2582 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2583 trace_nfs4_setattr(inode, err);
2585 case -NFS4ERR_OPENMODE:
2586 if (!(sattr->ia_valid & ATTR_SIZE)) {
2587 pr_warn_once("NFSv4: server %s is incorrectly "
2588 "applying open mode checks to "
2589 "a SETATTR that is not "
2590 "changing file size.\n",
2591 server->nfs_client->cl_hostname);
2593 if (state && !(state->state & FMODE_WRITE)) {
2595 if (sattr->ia_valid & ATTR_OPEN)
2600 err = nfs4_handle_exception(server, err, &exception);
2601 } while (exception.retry);
2606 struct nfs4_closedata {
2607 struct inode *inode;
2608 struct nfs4_state *state;
2609 struct nfs_closeargs arg;
2610 struct nfs_closeres res;
2611 struct nfs_fattr fattr;
2612 unsigned long timestamp;
2617 static void nfs4_free_closedata(void *data)
2619 struct nfs4_closedata *calldata = data;
2620 struct nfs4_state_owner *sp = calldata->state->owner;
2621 struct super_block *sb = calldata->state->inode->i_sb;
2624 pnfs_roc_release(calldata->state->inode);
2625 nfs4_put_open_state(calldata->state);
2626 nfs_free_seqid(calldata->arg.seqid);
2627 nfs4_put_state_owner(sp);
2628 nfs_sb_deactive(sb);
2632 static void nfs4_close_done(struct rpc_task *task, void *data)
2634 struct nfs4_closedata *calldata = data;
2635 struct nfs4_state *state = calldata->state;
2636 struct nfs_server *server = NFS_SERVER(calldata->inode);
2637 nfs4_stateid *res_stateid = NULL;
2639 dprintk("%s: begin!\n", __func__);
2640 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2642 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2643 /* hmm. we are done with the inode, and in the process of freeing
2644 * the state_owner. we keep this around to process errors
2646 switch (task->tk_status) {
2648 res_stateid = &calldata->res.stateid;
2649 if (calldata->arg.fmode == 0 && calldata->roc)
2650 pnfs_roc_set_barrier(state->inode,
2651 calldata->roc_barrier);
2652 renew_lease(server, calldata->timestamp);
2654 case -NFS4ERR_ADMIN_REVOKED:
2655 case -NFS4ERR_STALE_STATEID:
2656 case -NFS4ERR_OLD_STATEID:
2657 case -NFS4ERR_BAD_STATEID:
2658 case -NFS4ERR_EXPIRED:
2659 if (!nfs4_stateid_match(&calldata->arg.stateid,
2660 &state->open_stateid)) {
2661 rpc_restart_call_prepare(task);
2664 if (calldata->arg.fmode == 0)
2667 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2668 rpc_restart_call_prepare(task);
2672 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
2674 nfs_release_seqid(calldata->arg.seqid);
2675 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2676 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2679 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2681 struct nfs4_closedata *calldata = data;
2682 struct nfs4_state *state = calldata->state;
2683 struct inode *inode = calldata->inode;
2684 bool is_rdonly, is_wronly, is_rdwr;
2687 dprintk("%s: begin!\n", __func__);
2688 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2691 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2692 spin_lock(&state->owner->so_lock);
2693 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2694 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2695 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2696 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2697 /* Calculate the change in open mode */
2698 calldata->arg.fmode = 0;
2699 if (state->n_rdwr == 0) {
2700 if (state->n_rdonly == 0)
2701 call_close |= is_rdonly;
2703 calldata->arg.fmode |= FMODE_READ;
2704 if (state->n_wronly == 0)
2705 call_close |= is_wronly;
2707 calldata->arg.fmode |= FMODE_WRITE;
2709 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2711 if (calldata->arg.fmode == 0)
2712 call_close |= is_rdwr;
2714 if (!nfs4_valid_open_stateid(state))
2716 spin_unlock(&state->owner->so_lock);
2719 /* Note: exit _without_ calling nfs4_close_done */
2723 if (calldata->arg.fmode == 0) {
2724 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2725 if (calldata->roc &&
2726 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2727 nfs_release_seqid(calldata->arg.seqid);
2731 calldata->arg.share_access =
2732 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2733 calldata->arg.fmode, 0);
2735 nfs_fattr_init(calldata->res.fattr);
2736 calldata->timestamp = jiffies;
2737 if (nfs4_setup_sequence(NFS_SERVER(inode),
2738 &calldata->arg.seq_args,
2739 &calldata->res.seq_res,
2741 nfs_release_seqid(calldata->arg.seqid);
2742 dprintk("%s: done!\n", __func__);
2745 task->tk_action = NULL;
2747 nfs4_sequence_done(task, &calldata->res.seq_res);
2750 static const struct rpc_call_ops nfs4_close_ops = {
2751 .rpc_call_prepare = nfs4_close_prepare,
2752 .rpc_call_done = nfs4_close_done,
2753 .rpc_release = nfs4_free_closedata,
2756 static bool nfs4_roc(struct inode *inode)
2758 if (!nfs_have_layout(inode))
2760 return pnfs_roc(inode);
2764 * It is possible for data to be read/written from a mem-mapped file
2765 * after the sys_close call (which hits the vfs layer as a flush).
2766 * This means that we can't safely call nfsv4 close on a file until
2767 * the inode is cleared. This in turn means that we are not good
2768 * NFSv4 citizens - we do not indicate to the server to update the file's
2769 * share state even when we are done with one of the three share
2770 * stateid's in the inode.
2772 * NOTE: Caller must be holding the sp->so_owner semaphore!
2774 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2776 struct nfs_server *server = NFS_SERVER(state->inode);
2777 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2778 struct nfs4_closedata *calldata;
2779 struct nfs4_state_owner *sp = state->owner;
2780 struct rpc_task *task;
2781 struct rpc_message msg = {
2782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2783 .rpc_cred = state->owner->so_cred,
2785 struct rpc_task_setup task_setup_data = {
2786 .rpc_client = server->client,
2787 .rpc_message = &msg,
2788 .callback_ops = &nfs4_close_ops,
2789 .workqueue = nfsiod_workqueue,
2790 .flags = RPC_TASK_ASYNC,
2792 int status = -ENOMEM;
2794 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2795 &task_setup_data.rpc_client, &msg);
2797 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2798 if (calldata == NULL)
2800 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2801 calldata->inode = state->inode;
2802 calldata->state = state;
2803 calldata->arg.fh = NFS_FH(state->inode);
2804 /* Serialization for the sequence id */
2805 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2806 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2807 if (IS_ERR(calldata->arg.seqid))
2808 goto out_free_calldata;
2809 calldata->arg.fmode = 0;
2810 calldata->arg.bitmask = server->cache_consistency_bitmask;
2811 calldata->res.fattr = &calldata->fattr;
2812 calldata->res.seqid = calldata->arg.seqid;
2813 calldata->res.server = server;
2814 calldata->roc = nfs4_roc(state->inode);
2815 nfs_sb_active(calldata->inode->i_sb);
2817 msg.rpc_argp = &calldata->arg;
2818 msg.rpc_resp = &calldata->res;
2819 task_setup_data.callback_data = calldata;
2820 task = rpc_run_task(&task_setup_data);
2822 return PTR_ERR(task);
2825 status = rpc_wait_for_completion_task(task);
2831 nfs4_put_open_state(state);
2832 nfs4_put_state_owner(sp);
2836 static struct inode *
2837 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2838 int open_flags, struct iattr *attr, int *opened)
2840 struct nfs4_state *state;
2841 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2843 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2845 /* Protect against concurrent sillydeletes */
2846 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2848 nfs4_label_release_security(label);
2851 return ERR_CAST(state);
2852 return state->inode;
2855 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2857 if (ctx->state == NULL)
2860 nfs4_close_sync(ctx->state, ctx->mode);
2862 nfs4_close_state(ctx->state, ctx->mode);
2865 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2866 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2867 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
2869 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2871 struct nfs4_server_caps_arg args = {
2874 struct nfs4_server_caps_res res = {};
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2882 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2884 /* Sanity check the server answers */
2885 switch (server->nfs_client->cl_minorversion) {
2887 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2888 res.attr_bitmask[2] = 0;
2891 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2894 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2896 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2897 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2898 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2899 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2900 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2901 NFS_CAP_CTIME|NFS_CAP_MTIME|
2902 NFS_CAP_SECURITY_LABEL);
2903 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2904 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2905 server->caps |= NFS_CAP_ACLS;
2906 if (res.has_links != 0)
2907 server->caps |= NFS_CAP_HARDLINKS;
2908 if (res.has_symlinks != 0)
2909 server->caps |= NFS_CAP_SYMLINKS;
2910 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2911 server->caps |= NFS_CAP_FILEID;
2912 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2913 server->caps |= NFS_CAP_MODE;
2914 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2915 server->caps |= NFS_CAP_NLINK;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2917 server->caps |= NFS_CAP_OWNER;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2919 server->caps |= NFS_CAP_OWNER_GROUP;
2920 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2921 server->caps |= NFS_CAP_ATIME;
2922 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2923 server->caps |= NFS_CAP_CTIME;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2925 server->caps |= NFS_CAP_MTIME;
2926 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
2927 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2928 server->caps |= NFS_CAP_SECURITY_LABEL;
2930 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2931 sizeof(server->attr_bitmask));
2932 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2934 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2935 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2936 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2937 server->cache_consistency_bitmask[2] = 0;
2938 server->acl_bitmask = res.acl_bitmask;
2939 server->fh_expire_type = res.fh_expire_type;
2945 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2947 struct nfs4_exception exception = { };
2950 err = nfs4_handle_exception(server,
2951 _nfs4_server_capabilities(server, fhandle),
2953 } while (exception.retry);
2957 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *info)
2961 struct nfs4_lookup_root_arg args = {
2964 struct nfs4_lookup_res res = {
2966 .fattr = info->fattr,
2969 struct rpc_message msg = {
2970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2975 bitmask[0] = nfs4_fattr_bitmap[0];
2976 bitmask[1] = nfs4_fattr_bitmap[1];
2978 * Process the label in the upcoming getfattr
2980 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2982 nfs_fattr_init(info->fattr);
2983 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2986 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2987 struct nfs_fsinfo *info)
2989 struct nfs4_exception exception = { };
2992 err = _nfs4_lookup_root(server, fhandle, info);
2993 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
2996 case -NFS4ERR_WRONGSEC:
2999 err = nfs4_handle_exception(server, err, &exception);
3001 } while (exception.retry);
3006 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3007 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3009 struct rpc_auth_create_args auth_args = {
3010 .pseudoflavor = flavor,
3012 struct rpc_auth *auth;
3015 auth = rpcauth_create(&auth_args, server->client);
3020 ret = nfs4_lookup_root(server, fhandle, info);
3026 * Retry pseudoroot lookup with various security flavors. We do this when:
3028 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3029 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3031 * Returns zero on success, or a negative NFS4ERR value, or a
3032 * negative errno value.
3034 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3035 struct nfs_fsinfo *info)
3037 /* Per 3530bis 15.33.5 */
3038 static const rpc_authflavor_t flav_array[] = {
3042 RPC_AUTH_UNIX, /* courtesy */
3045 int status = -EPERM;
3048 if (server->auth_info.flavor_len > 0) {
3049 /* try each flavor specified by user */
3050 for (i = 0; i < server->auth_info.flavor_len; i++) {
3051 status = nfs4_lookup_root_sec(server, fhandle, info,
3052 server->auth_info.flavors[i]);
3053 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3058 /* no flavors specified by user, try default list */
3059 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3060 status = nfs4_lookup_root_sec(server, fhandle, info,
3062 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3069 * -EACCESS could mean that the user doesn't have correct permissions
3070 * to access the mount. It could also mean that we tried to mount
3071 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3072 * existing mount programs don't handle -EACCES very well so it should
3073 * be mapped to -EPERM instead.
3075 if (status == -EACCES)
3080 static int nfs4_do_find_root_sec(struct nfs_server *server,
3081 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3083 int mv = server->nfs_client->cl_minorversion;
3084 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3088 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3089 * @server: initialized nfs_server handle
3090 * @fhandle: we fill in the pseudo-fs root file handle
3091 * @info: we fill in an FSINFO struct
3092 * @auth_probe: probe the auth flavours
3094 * Returns zero on success, or a negative errno.
3096 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3097 struct nfs_fsinfo *info,
3103 status = nfs4_lookup_root(server, fhandle, info);
3105 if (auth_probe || status == NFS4ERR_WRONGSEC)
3106 status = nfs4_do_find_root_sec(server, fhandle, info);
3109 status = nfs4_server_capabilities(server, fhandle);
3111 status = nfs4_do_fsinfo(server, fhandle, info);
3113 return nfs4_map_errors(status);
3116 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3117 struct nfs_fsinfo *info)
3120 struct nfs_fattr *fattr = info->fattr;
3121 struct nfs4_label *label = NULL;
3123 error = nfs4_server_capabilities(server, mntfh);
3125 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3129 label = nfs4_label_alloc(server, GFP_KERNEL);
3131 return PTR_ERR(label);
3133 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3135 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3136 goto err_free_label;
3139 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3140 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3141 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3144 nfs4_label_free(label);
3150 * Get locations and (maybe) other attributes of a referral.
3151 * Note that we'll actually follow the referral later when
3152 * we detect fsid mismatch in inode revalidation
3154 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3155 const struct qstr *name, struct nfs_fattr *fattr,
3156 struct nfs_fh *fhandle)
3158 int status = -ENOMEM;
3159 struct page *page = NULL;
3160 struct nfs4_fs_locations *locations = NULL;
3162 page = alloc_page(GFP_KERNEL);
3165 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3166 if (locations == NULL)
3169 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3174 * If the fsid didn't change, this is a migration event, not a
3175 * referral. Cause us to drop into the exception handler, which
3176 * will kick off migration recovery.
3178 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3179 dprintk("%s: server did not return a different fsid for"
3180 " a referral at %s\n", __func__, name->name);
3181 status = -NFS4ERR_MOVED;
3184 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3185 nfs_fixup_referral_attributes(&locations->fattr);
3187 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3188 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3189 memset(fhandle, 0, sizeof(struct nfs_fh));
3197 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fattr *fattr, struct nfs4_label *label)
3200 struct nfs4_getattr_arg args = {
3202 .bitmask = server->attr_bitmask,
3204 struct nfs4_getattr_res res = {
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3215 args.bitmask = nfs4_bitmask(server, label);
3217 nfs_fattr_init(fattr);
3218 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3221 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3222 struct nfs_fattr *fattr, struct nfs4_label *label)
3224 struct nfs4_exception exception = { };
3227 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3228 trace_nfs4_getattr(server, fhandle, fattr, err);
3229 err = nfs4_handle_exception(server, err,
3231 } while (exception.retry);
3236 * The file is not closed if it is opened due to the a request to change
3237 * the size of the file. The open call will not be needed once the
3238 * VFS layer lookup-intents are implemented.
3240 * Close is called when the inode is destroyed.
3241 * If we haven't opened the file for O_WRONLY, we
3242 * need to in the size_change case to obtain a stateid.
3245 * Because OPEN is always done by name in nfsv4, it is
3246 * possible that we opened a different file by the same
3247 * name. We can recognize this race condition, but we
3248 * can't do anything about it besides returning an error.
3250 * This will be fixed with VFS changes (lookup-intent).
3253 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3254 struct iattr *sattr)
3256 struct inode *inode = d_inode(dentry);
3257 struct rpc_cred *cred = NULL;
3258 struct nfs4_state *state = NULL;
3259 struct nfs4_label *label = NULL;
3262 if (pnfs_ld_layoutret_on_setattr(inode) &&
3263 sattr->ia_valid & ATTR_SIZE &&
3264 sattr->ia_size < i_size_read(inode))
3265 pnfs_commit_and_return_layout(inode);
3267 nfs_fattr_init(fattr);
3269 /* Deal with open(O_TRUNC) */
3270 if (sattr->ia_valid & ATTR_OPEN)
3271 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3273 /* Optimization: if the end result is no change, don't RPC */
3274 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3277 /* Search for an existing open(O_WRITE) file */
3278 if (sattr->ia_valid & ATTR_FILE) {
3279 struct nfs_open_context *ctx;
3281 ctx = nfs_file_open_context(sattr->ia_file);
3288 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3290 return PTR_ERR(label);
3292 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3294 nfs_setattr_update_inode(inode, sattr, fattr);
3295 nfs_setsecurity(inode, fattr, label);
3297 nfs4_label_free(label);
3301 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3302 const struct qstr *name, struct nfs_fh *fhandle,
3303 struct nfs_fattr *fattr, struct nfs4_label *label)
3305 struct nfs_server *server = NFS_SERVER(dir);
3307 struct nfs4_lookup_arg args = {
3308 .bitmask = server->attr_bitmask,
3309 .dir_fh = NFS_FH(dir),
3312 struct nfs4_lookup_res res = {
3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3324 args.bitmask = nfs4_bitmask(server, label);
3326 nfs_fattr_init(fattr);
3328 dprintk("NFS call lookup %s\n", name->name);
3329 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3330 dprintk("NFS reply lookup: %d\n", status);
3334 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3336 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3337 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3338 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3342 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3343 struct qstr *name, struct nfs_fh *fhandle,
3344 struct nfs_fattr *fattr, struct nfs4_label *label)
3346 struct nfs4_exception exception = { };
3347 struct rpc_clnt *client = *clnt;
3350 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3351 trace_nfs4_lookup(dir, name, err);
3353 case -NFS4ERR_BADNAME:
3356 case -NFS4ERR_MOVED:
3357 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3358 if (err == -NFS4ERR_MOVED)
3359 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3361 case -NFS4ERR_WRONGSEC:
3363 if (client != *clnt)
3365 client = nfs4_negotiate_security(client, dir, name);
3367 return PTR_ERR(client);
3369 exception.retry = 1;
3372 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3374 } while (exception.retry);
3379 else if (client != *clnt)
3380 rpc_shutdown_client(client);
3385 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3386 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3387 struct nfs4_label *label)
3390 struct rpc_clnt *client = NFS_CLIENT(dir);
3392 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3393 if (client != NFS_CLIENT(dir)) {
3394 rpc_shutdown_client(client);
3395 nfs_fixup_secinfo_attributes(fattr);
3401 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3402 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3404 struct rpc_clnt *client = NFS_CLIENT(dir);
3407 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3409 return ERR_PTR(status);
3410 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3413 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3415 struct nfs_server *server = NFS_SERVER(inode);
3416 struct nfs4_accessargs args = {
3417 .fh = NFS_FH(inode),
3418 .bitmask = server->cache_consistency_bitmask,
3420 struct nfs4_accessres res = {
3423 struct rpc_message msg = {
3424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3427 .rpc_cred = entry->cred,
3429 int mode = entry->mask;
3433 * Determine which access bits we want to ask for...
3435 if (mode & MAY_READ)
3436 args.access |= NFS4_ACCESS_READ;
3437 if (S_ISDIR(inode->i_mode)) {
3438 if (mode & MAY_WRITE)
3439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3440 if (mode & MAY_EXEC)
3441 args.access |= NFS4_ACCESS_LOOKUP;
3443 if (mode & MAY_WRITE)
3444 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3445 if (mode & MAY_EXEC)
3446 args.access |= NFS4_ACCESS_EXECUTE;
3449 res.fattr = nfs_alloc_fattr();
3450 if (res.fattr == NULL)
3453 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3455 nfs_access_set_mask(entry, res.access);
3456 nfs_refresh_inode(inode, res.fattr);
3458 nfs_free_fattr(res.fattr);
3462 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3464 struct nfs4_exception exception = { };
3467 err = _nfs4_proc_access(inode, entry);
3468 trace_nfs4_access(inode, err);
3469 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3471 } while (exception.retry);
3476 * TODO: For the time being, we don't try to get any attributes
3477 * along with any of the zero-copy operations READ, READDIR,
3480 * In the case of the first three, we want to put the GETATTR
3481 * after the read-type operation -- this is because it is hard
3482 * to predict the length of a GETATTR response in v4, and thus
3483 * align the READ data correctly. This means that the GETATTR
3484 * may end up partially falling into the page cache, and we should
3485 * shift it into the 'tail' of the xdr_buf before processing.
3486 * To do this efficiently, we need to know the total length
3487 * of data received, which doesn't seem to be available outside
3490 * In the case of WRITE, we also want to put the GETATTR after
3491 * the operation -- in this case because we want to make sure
3492 * we get the post-operation mtime and size.
3494 * Both of these changes to the XDR layer would in fact be quite
3495 * minor, but I decided to leave them for a subsequent patch.
3497 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3498 unsigned int pgbase, unsigned int pglen)
3500 struct nfs4_readlink args = {
3501 .fh = NFS_FH(inode),
3506 struct nfs4_readlink_res res;
3507 struct rpc_message msg = {
3508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3513 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3516 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3517 unsigned int pgbase, unsigned int pglen)
3519 struct nfs4_exception exception = { };
3522 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3523 trace_nfs4_readlink(inode, err);
3524 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3526 } while (exception.retry);
3531 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3534 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3537 struct nfs4_label l, *ilabel = NULL;
3538 struct nfs_open_context *ctx;
3539 struct nfs4_state *state;
3543 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3545 return PTR_ERR(ctx);
3547 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3549 sattr->ia_mode &= ~current_umask();
3550 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
3551 if (IS_ERR(state)) {
3552 status = PTR_ERR(state);
3556 nfs4_label_release_security(ilabel);
3557 put_nfs_open_context(ctx);
3561 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3563 struct nfs_server *server = NFS_SERVER(dir);
3564 struct nfs_removeargs args = {
3568 struct nfs_removeres res = {
3571 struct rpc_message msg = {
3572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3578 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3580 update_changeattr(dir, &res.cinfo);
3584 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3586 struct nfs4_exception exception = { };
3589 err = _nfs4_proc_remove(dir, name);
3590 trace_nfs4_remove(dir, name, err);
3591 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3593 } while (exception.retry);
3597 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3599 struct nfs_server *server = NFS_SERVER(dir);
3600 struct nfs_removeargs *args = msg->rpc_argp;
3601 struct nfs_removeres *res = msg->rpc_resp;
3603 res->server = server;
3604 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3605 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3607 nfs_fattr_init(res->dir_attr);
3610 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3612 nfs4_setup_sequence(NFS_SERVER(data->dir),
3613 &data->args.seq_args,
3618 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3620 struct nfs_unlinkdata *data = task->tk_calldata;
3621 struct nfs_removeres *res = &data->res;
3623 if (!nfs4_sequence_done(task, &res->seq_res))
3625 if (nfs4_async_handle_error(task, res->server, NULL,
3626 &data->timeout) == -EAGAIN)
3628 update_changeattr(dir, &res->cinfo);
3632 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3634 struct nfs_server *server = NFS_SERVER(dir);
3635 struct nfs_renameargs *arg = msg->rpc_argp;
3636 struct nfs_renameres *res = msg->rpc_resp;
3638 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3639 res->server = server;
3640 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3643 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3645 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3646 &data->args.seq_args,
3651 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3652 struct inode *new_dir)
3654 struct nfs_renamedata *data = task->tk_calldata;
3655 struct nfs_renameres *res = &data->res;
3657 if (!nfs4_sequence_done(task, &res->seq_res))
3659 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3662 update_changeattr(old_dir, &res->old_cinfo);
3663 update_changeattr(new_dir, &res->new_cinfo);
3667 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3669 struct nfs_server *server = NFS_SERVER(inode);
3670 struct nfs4_link_arg arg = {
3671 .fh = NFS_FH(inode),
3672 .dir_fh = NFS_FH(dir),
3674 .bitmask = server->attr_bitmask,
3676 struct nfs4_link_res res = {
3680 struct rpc_message msg = {
3681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3685 int status = -ENOMEM;
3687 res.fattr = nfs_alloc_fattr();
3688 if (res.fattr == NULL)
3691 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3692 if (IS_ERR(res.label)) {
3693 status = PTR_ERR(res.label);
3696 arg.bitmask = nfs4_bitmask(server, res.label);
3698 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3700 update_changeattr(dir, &res.cinfo);
3701 status = nfs_post_op_update_inode(inode, res.fattr);
3703 nfs_setsecurity(inode, res.fattr, res.label);
3707 nfs4_label_free(res.label);
3710 nfs_free_fattr(res.fattr);
3714 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3716 struct nfs4_exception exception = { };
3719 err = nfs4_handle_exception(NFS_SERVER(inode),
3720 _nfs4_proc_link(inode, dir, name),
3722 } while (exception.retry);
3726 struct nfs4_createdata {
3727 struct rpc_message msg;
3728 struct nfs4_create_arg arg;
3729 struct nfs4_create_res res;
3731 struct nfs_fattr fattr;
3732 struct nfs4_label *label;
3735 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3736 struct qstr *name, struct iattr *sattr, u32 ftype)
3738 struct nfs4_createdata *data;
3740 data = kzalloc(sizeof(*data), GFP_KERNEL);
3742 struct nfs_server *server = NFS_SERVER(dir);
3744 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3745 if (IS_ERR(data->label))
3748 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3749 data->msg.rpc_argp = &data->arg;
3750 data->msg.rpc_resp = &data->res;
3751 data->arg.dir_fh = NFS_FH(dir);
3752 data->arg.server = server;
3753 data->arg.name = name;
3754 data->arg.attrs = sattr;
3755 data->arg.ftype = ftype;
3756 data->arg.bitmask = nfs4_bitmask(server, data->label);
3757 data->res.server = server;
3758 data->res.fh = &data->fh;
3759 data->res.fattr = &data->fattr;
3760 data->res.label = data->label;
3761 nfs_fattr_init(data->res.fattr);
3769 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3771 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3772 &data->arg.seq_args, &data->res.seq_res, 1);
3774 update_changeattr(dir, &data->res.dir_cinfo);
3775 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3780 static void nfs4_free_createdata(struct nfs4_createdata *data)
3782 nfs4_label_free(data->label);
3786 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3787 struct page *page, unsigned int len, struct iattr *sattr,
3788 struct nfs4_label *label)
3790 struct nfs4_createdata *data;
3791 int status = -ENAMETOOLONG;
3793 if (len > NFS4_MAXPATHLEN)
3797 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3801 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3802 data->arg.u.symlink.pages = &page;
3803 data->arg.u.symlink.len = len;
3804 data->arg.label = label;
3806 status = nfs4_do_create(dir, dentry, data);
3808 nfs4_free_createdata(data);
3813 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3814 struct page *page, unsigned int len, struct iattr *sattr)
3816 struct nfs4_exception exception = { };
3817 struct nfs4_label l, *label = NULL;
3820 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3823 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3824 trace_nfs4_symlink(dir, &dentry->d_name, err);
3825 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3827 } while (exception.retry);
3829 nfs4_label_release_security(label);
3833 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3834 struct iattr *sattr, struct nfs4_label *label)
3836 struct nfs4_createdata *data;
3837 int status = -ENOMEM;
3839 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3843 data->arg.label = label;
3844 status = nfs4_do_create(dir, dentry, data);
3846 nfs4_free_createdata(data);
3851 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3852 struct iattr *sattr)
3854 struct nfs4_exception exception = { };
3855 struct nfs4_label l, *label = NULL;
3858 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3860 sattr->ia_mode &= ~current_umask();
3862 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3863 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3864 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3866 } while (exception.retry);
3867 nfs4_label_release_security(label);
3872 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3873 u64 cookie, struct page **pages, unsigned int count, int plus)
3875 struct inode *dir = d_inode(dentry);
3876 struct nfs4_readdir_arg args = {
3881 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
3884 struct nfs4_readdir_res res;
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3893 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3895 (unsigned long long)cookie);
3896 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3897 res.pgbase = args.pgbase;
3898 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3900 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3901 status += args.pgbase;
3904 nfs_invalidate_atime(dir);
3906 dprintk("%s: returns %d\n", __func__, status);
3910 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3911 u64 cookie, struct page **pages, unsigned int count, int plus)
3913 struct nfs4_exception exception = { };
3916 err = _nfs4_proc_readdir(dentry, cred, cookie,
3917 pages, count, plus);
3918 trace_nfs4_readdir(d_inode(dentry), err);
3919 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
3921 } while (exception.retry);
3925 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3926 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
3928 struct nfs4_createdata *data;
3929 int mode = sattr->ia_mode;
3930 int status = -ENOMEM;
3932 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3937 data->arg.ftype = NF4FIFO;
3938 else if (S_ISBLK(mode)) {
3939 data->arg.ftype = NF4BLK;
3940 data->arg.u.device.specdata1 = MAJOR(rdev);
3941 data->arg.u.device.specdata2 = MINOR(rdev);
3943 else if (S_ISCHR(mode)) {
3944 data->arg.ftype = NF4CHR;
3945 data->arg.u.device.specdata1 = MAJOR(rdev);
3946 data->arg.u.device.specdata2 = MINOR(rdev);
3947 } else if (!S_ISSOCK(mode)) {
3952 data->arg.label = label;
3953 status = nfs4_do_create(dir, dentry, data);
3955 nfs4_free_createdata(data);
3960 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3961 struct iattr *sattr, dev_t rdev)
3963 struct nfs4_exception exception = { };
3964 struct nfs4_label l, *label = NULL;
3967 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3969 sattr->ia_mode &= ~current_umask();
3971 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3972 trace_nfs4_mknod(dir, &dentry->d_name, err);
3973 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3975 } while (exception.retry);
3977 nfs4_label_release_security(label);
3982 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3983 struct nfs_fsstat *fsstat)
3985 struct nfs4_statfs_arg args = {
3987 .bitmask = server->attr_bitmask,
3989 struct nfs4_statfs_res res = {
3992 struct rpc_message msg = {
3993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3998 nfs_fattr_init(fsstat->fattr);
3999 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4002 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4004 struct nfs4_exception exception = { };
4007 err = nfs4_handle_exception(server,
4008 _nfs4_proc_statfs(server, fhandle, fsstat),
4010 } while (exception.retry);
4014 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4015 struct nfs_fsinfo *fsinfo)
4017 struct nfs4_fsinfo_arg args = {
4019 .bitmask = server->attr_bitmask,
4021 struct nfs4_fsinfo_res res = {
4024 struct rpc_message msg = {
4025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4030 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4033 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4035 struct nfs4_exception exception = { };
4036 unsigned long now = jiffies;
4040 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4041 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4043 struct nfs_client *clp = server->nfs_client;
4045 spin_lock(&clp->cl_lock);
4046 clp->cl_lease_time = fsinfo->lease_time * HZ;
4047 clp->cl_last_renewal = now;
4048 spin_unlock(&clp->cl_lock);
4051 err = nfs4_handle_exception(server, err, &exception);
4052 } while (exception.retry);
4056 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4060 nfs_fattr_init(fsinfo->fattr);
4061 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4063 /* block layout checks this! */
4064 server->pnfs_blksize = fsinfo->blksize;
4065 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4071 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4072 struct nfs_pathconf *pathconf)
4074 struct nfs4_pathconf_arg args = {
4076 .bitmask = server->attr_bitmask,
4078 struct nfs4_pathconf_res res = {
4079 .pathconf = pathconf,
4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4087 /* None of the pathconf attributes are mandatory to implement */
4088 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4089 memset(pathconf, 0, sizeof(*pathconf));
4093 nfs_fattr_init(pathconf->fattr);
4094 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4097 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4098 struct nfs_pathconf *pathconf)
4100 struct nfs4_exception exception = { };
4104 err = nfs4_handle_exception(server,
4105 _nfs4_proc_pathconf(server, fhandle, pathconf),
4107 } while (exception.retry);
4111 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4112 const struct nfs_open_context *ctx,
4113 const struct nfs_lock_context *l_ctx,
4116 const struct nfs_lockowner *lockowner = NULL;
4119 lockowner = &l_ctx->lockowner;
4120 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4122 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4124 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4125 const struct nfs_open_context *ctx,
4126 const struct nfs_lock_context *l_ctx,
4129 nfs4_stateid current_stateid;
4131 /* If the current stateid represents a lost lock, then exit */
4132 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4134 return nfs4_stateid_match(stateid, ¤t_stateid);
4137 static bool nfs4_error_stateid_expired(int err)
4140 case -NFS4ERR_DELEG_REVOKED:
4141 case -NFS4ERR_ADMIN_REVOKED:
4142 case -NFS4ERR_BAD_STATEID:
4143 case -NFS4ERR_STALE_STATEID:
4144 case -NFS4ERR_OLD_STATEID:
4145 case -NFS4ERR_OPENMODE:
4146 case -NFS4ERR_EXPIRED:
4152 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4154 nfs_invalidate_atime(hdr->inode);
4157 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4159 struct nfs_server *server = NFS_SERVER(hdr->inode);
4161 trace_nfs4_read(hdr, task->tk_status);
4162 if (nfs4_async_handle_error(task, server,
4163 hdr->args.context->state,
4165 rpc_restart_call_prepare(task);
4169 __nfs4_read_done_cb(hdr);
4170 if (task->tk_status > 0)
4171 renew_lease(server, hdr->timestamp);
4175 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4176 struct nfs_pgio_args *args)
4179 if (!nfs4_error_stateid_expired(task->tk_status) ||
4180 nfs4_stateid_is_current(&args->stateid,
4185 rpc_restart_call_prepare(task);
4189 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4192 dprintk("--> %s\n", __func__);
4194 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4196 if (nfs4_read_stateid_changed(task, &hdr->args))
4198 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4199 nfs4_read_done_cb(task, hdr);
4202 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4203 struct rpc_message *msg)
4205 hdr->timestamp = jiffies;
4206 hdr->pgio_done_cb = nfs4_read_done_cb;
4207 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4208 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4211 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4212 struct nfs_pgio_header *hdr)
4214 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4215 &hdr->args.seq_args,
4219 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4220 hdr->args.lock_context,
4221 hdr->rw_ops->rw_mode) == -EIO)
4223 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4228 static int nfs4_write_done_cb(struct rpc_task *task,
4229 struct nfs_pgio_header *hdr)
4231 struct inode *inode = hdr->inode;
4233 trace_nfs4_write(hdr, task->tk_status);
4234 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4235 hdr->args.context->state,
4237 rpc_restart_call_prepare(task);
4240 if (task->tk_status >= 0) {
4241 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4242 nfs_writeback_update_inode(hdr);
4247 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4248 struct nfs_pgio_args *args)
4251 if (!nfs4_error_stateid_expired(task->tk_status) ||
4252 nfs4_stateid_is_current(&args->stateid,
4257 rpc_restart_call_prepare(task);
4261 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4263 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4265 if (nfs4_write_stateid_changed(task, &hdr->args))
4267 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4268 nfs4_write_done_cb(task, hdr);
4272 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4274 /* Don't request attributes for pNFS or O_DIRECT writes */
4275 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4277 /* Otherwise, request attributes if and only if we don't hold
4280 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4283 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4284 struct rpc_message *msg)
4286 struct nfs_server *server = NFS_SERVER(hdr->inode);
4288 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4289 hdr->args.bitmask = NULL;
4290 hdr->res.fattr = NULL;
4292 hdr->args.bitmask = server->cache_consistency_bitmask;
4294 if (!hdr->pgio_done_cb)
4295 hdr->pgio_done_cb = nfs4_write_done_cb;
4296 hdr->res.server = server;
4297 hdr->timestamp = jiffies;
4299 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4300 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4303 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4305 nfs4_setup_sequence(NFS_SERVER(data->inode),
4306 &data->args.seq_args,
4311 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4313 struct inode *inode = data->inode;
4315 trace_nfs4_commit(data, task->tk_status);
4316 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4317 NULL, NULL) == -EAGAIN) {
4318 rpc_restart_call_prepare(task);
4324 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4326 if (!nfs4_sequence_done(task, &data->res.seq_res))
4328 return data->commit_done_cb(task, data);
4331 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4333 struct nfs_server *server = NFS_SERVER(data->inode);
4335 if (data->commit_done_cb == NULL)
4336 data->commit_done_cb = nfs4_commit_done_cb;
4337 data->res.server = server;
4338 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4339 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4342 struct nfs4_renewdata {
4343 struct nfs_client *client;
4344 unsigned long timestamp;
4348 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4349 * standalone procedure for queueing an asynchronous RENEW.
4351 static void nfs4_renew_release(void *calldata)
4353 struct nfs4_renewdata *data = calldata;
4354 struct nfs_client *clp = data->client;
4356 if (atomic_read(&clp->cl_count) > 1)
4357 nfs4_schedule_state_renewal(clp);
4358 nfs_put_client(clp);
4362 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4364 struct nfs4_renewdata *data = calldata;
4365 struct nfs_client *clp = data->client;
4366 unsigned long timestamp = data->timestamp;
4368 trace_nfs4_renew_async(clp, task->tk_status);
4369 switch (task->tk_status) {
4372 case -NFS4ERR_LEASE_MOVED:
4373 nfs4_schedule_lease_moved_recovery(clp);
4376 /* Unless we're shutting down, schedule state recovery! */
4377 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4379 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4380 nfs4_schedule_lease_recovery(clp);
4383 nfs4_schedule_path_down_recovery(clp);
4385 do_renew_lease(clp, timestamp);
4388 static const struct rpc_call_ops nfs4_renew_ops = {
4389 .rpc_call_done = nfs4_renew_done,
4390 .rpc_release = nfs4_renew_release,
4393 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4395 struct rpc_message msg = {
4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4400 struct nfs4_renewdata *data;
4402 if (renew_flags == 0)
4404 if (!atomic_inc_not_zero(&clp->cl_count))
4406 data = kmalloc(sizeof(*data), GFP_NOFS);
4410 data->timestamp = jiffies;
4411 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4412 &nfs4_renew_ops, data);
4415 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4417 struct rpc_message msg = {
4418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4422 unsigned long now = jiffies;
4425 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4428 do_renew_lease(clp, now);
4432 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4434 return server->caps & NFS_CAP_ACLS;
4437 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4438 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4441 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4443 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4444 struct page **pages, unsigned int *pgbase)
4446 struct page *newpage, **spages;
4452 len = min_t(size_t, PAGE_SIZE, buflen);
4453 newpage = alloc_page(GFP_KERNEL);
4455 if (newpage == NULL)
4457 memcpy(page_address(newpage), buf, len);
4462 } while (buflen != 0);
4468 __free_page(spages[rc-1]);
4472 struct nfs4_cached_acl {
4478 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4480 struct nfs_inode *nfsi = NFS_I(inode);
4482 spin_lock(&inode->i_lock);
4483 kfree(nfsi->nfs4_acl);
4484 nfsi->nfs4_acl = acl;
4485 spin_unlock(&inode->i_lock);
4488 static void nfs4_zap_acl_attr(struct inode *inode)
4490 nfs4_set_cached_acl(inode, NULL);
4493 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4495 struct nfs_inode *nfsi = NFS_I(inode);
4496 struct nfs4_cached_acl *acl;
4499 spin_lock(&inode->i_lock);
4500 acl = nfsi->nfs4_acl;
4503 if (buf == NULL) /* user is just asking for length */
4505 if (acl->cached == 0)
4507 ret = -ERANGE; /* see getxattr(2) man page */
4508 if (acl->len > buflen)
4510 memcpy(buf, acl->data, acl->len);
4514 spin_unlock(&inode->i_lock);
4518 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4520 struct nfs4_cached_acl *acl;
4521 size_t buflen = sizeof(*acl) + acl_len;
4523 if (buflen <= PAGE_SIZE) {
4524 acl = kmalloc(buflen, GFP_KERNEL);
4528 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4530 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4537 nfs4_set_cached_acl(inode, acl);
4541 * The getxattr API returns the required buffer length when called with a
4542 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4543 * the required buf. On a NULL buf, we send a page of data to the server
4544 * guessing that the ACL request can be serviced by a page. If so, we cache
4545 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4546 * the cache. If not so, we throw away the page, and cache the required
4547 * length. The next getxattr call will then produce another round trip to
4548 * the server, this time with the input buf of the required size.
4550 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4552 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4553 struct nfs_getaclargs args = {
4554 .fh = NFS_FH(inode),
4558 struct nfs_getaclres res = {
4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4566 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4567 int ret = -ENOMEM, i;
4569 /* As long as we're doing a round trip to the server anyway,
4570 * let's be prepared for a page of acl data. */
4573 if (npages > ARRAY_SIZE(pages))
4576 for (i = 0; i < npages; i++) {
4577 pages[i] = alloc_page(GFP_KERNEL);
4582 /* for decoding across pages */
4583 res.acl_scratch = alloc_page(GFP_KERNEL);
4584 if (!res.acl_scratch)
4587 args.acl_len = npages * PAGE_SIZE;
4588 args.acl_pgbase = 0;
4590 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4591 __func__, buf, buflen, npages, args.acl_len);
4592 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4593 &msg, &args.seq_args, &res.seq_res, 0);
4597 /* Handle the case where the passed-in buffer is too short */
4598 if (res.acl_flags & NFS4_ACL_TRUNC) {
4599 /* Did the user only issue a request for the acl length? */
4605 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4607 if (res.acl_len > buflen) {
4611 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4616 for (i = 0; i < npages; i++)
4618 __free_page(pages[i]);
4619 if (res.acl_scratch)
4620 __free_page(res.acl_scratch);
4624 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4626 struct nfs4_exception exception = { };
4629 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4630 trace_nfs4_get_acl(inode, ret);
4633 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4634 } while (exception.retry);
4638 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4640 struct nfs_server *server = NFS_SERVER(inode);
4643 if (!nfs4_server_supports_acls(server))
4645 ret = nfs_revalidate_inode(server, inode);
4648 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4649 nfs_zap_acl_cache(inode);
4650 ret = nfs4_read_cached_acl(inode, buf, buflen);
4652 /* -ENOENT is returned if there is no ACL or if there is an ACL
4653 * but no cached acl data, just the acl length */
4655 return nfs4_get_acl_uncached(inode, buf, buflen);
4658 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4660 struct nfs_server *server = NFS_SERVER(inode);
4661 struct page *pages[NFS4ACL_MAXPAGES];
4662 struct nfs_setaclargs arg = {
4663 .fh = NFS_FH(inode),
4667 struct nfs_setaclres res;
4668 struct rpc_message msg = {
4669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4673 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4676 if (!nfs4_server_supports_acls(server))
4678 if (npages > ARRAY_SIZE(pages))
4680 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4683 nfs4_inode_return_delegation(inode);
4684 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4687 * Free each page after tx, so the only ref left is
4688 * held by the network stack
4691 put_page(pages[i-1]);
4694 * Acl update can result in inode attribute update.
4695 * so mark the attribute cache invalid.
4697 spin_lock(&inode->i_lock);
4698 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4699 spin_unlock(&inode->i_lock);
4700 nfs_access_zap_cache(inode);
4701 nfs_zap_acl_cache(inode);
4705 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4707 struct nfs4_exception exception = { };
4710 err = __nfs4_proc_set_acl(inode, buf, buflen);
4711 trace_nfs4_set_acl(inode, err);
4712 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4714 } while (exception.retry);
4718 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4719 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4722 struct nfs_server *server = NFS_SERVER(inode);
4723 struct nfs_fattr fattr;
4724 struct nfs4_label label = {0, 0, buflen, buf};
4726 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4727 struct nfs4_getattr_arg arg = {
4728 .fh = NFS_FH(inode),
4731 struct nfs4_getattr_res res = {
4736 struct rpc_message msg = {
4737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4743 nfs_fattr_init(&fattr);
4745 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4748 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4750 if (buflen < label.len)
4755 static int nfs4_get_security_label(struct inode *inode, void *buf,
4758 struct nfs4_exception exception = { };
4761 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4765 err = _nfs4_get_security_label(inode, buf, buflen);
4766 trace_nfs4_get_security_label(inode, err);
4767 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4769 } while (exception.retry);
4773 static int _nfs4_do_set_security_label(struct inode *inode,
4774 struct nfs4_label *ilabel,
4775 struct nfs_fattr *fattr,
4776 struct nfs4_label *olabel)
4779 struct iattr sattr = {0};
4780 struct nfs_server *server = NFS_SERVER(inode);
4781 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4782 struct nfs_setattrargs arg = {
4783 .fh = NFS_FH(inode),
4789 struct nfs_setattrres res = {
4794 struct rpc_message msg = {
4795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4801 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4803 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4805 dprintk("%s failed: %d\n", __func__, status);
4810 static int nfs4_do_set_security_label(struct inode *inode,
4811 struct nfs4_label *ilabel,
4812 struct nfs_fattr *fattr,
4813 struct nfs4_label *olabel)
4815 struct nfs4_exception exception = { };
4819 err = _nfs4_do_set_security_label(inode, ilabel,
4821 trace_nfs4_set_security_label(inode, err);
4822 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4824 } while (exception.retry);
4829 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4831 struct nfs4_label ilabel, *olabel = NULL;
4832 struct nfs_fattr fattr;
4833 struct rpc_cred *cred;
4834 struct inode *inode = d_inode(dentry);
4837 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4840 nfs_fattr_init(&fattr);
4844 ilabel.label = (char *)buf;
4845 ilabel.len = buflen;
4847 cred = rpc_lookup_cred();
4849 return PTR_ERR(cred);
4851 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4852 if (IS_ERR(olabel)) {
4853 status = -PTR_ERR(olabel);
4857 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4859 nfs_setsecurity(inode, &fattr, olabel);
4861 nfs4_label_free(olabel);
4866 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4870 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4871 struct nfs4_state *state, long *timeout)
4873 struct nfs_client *clp = server->nfs_client;
4875 if (task->tk_status >= 0)
4877 switch(task->tk_status) {
4878 case -NFS4ERR_DELEG_REVOKED:
4879 case -NFS4ERR_ADMIN_REVOKED:
4880 case -NFS4ERR_BAD_STATEID:
4881 case -NFS4ERR_OPENMODE:
4884 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4885 goto recovery_failed;
4886 goto wait_on_recovery;
4887 case -NFS4ERR_EXPIRED:
4888 if (state != NULL) {
4889 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4890 goto recovery_failed;
4892 case -NFS4ERR_STALE_STATEID:
4893 case -NFS4ERR_STALE_CLIENTID:
4894 nfs4_schedule_lease_recovery(clp);
4895 goto wait_on_recovery;
4896 case -NFS4ERR_MOVED:
4897 if (nfs4_schedule_migration_recovery(server) < 0)
4898 goto recovery_failed;
4899 goto wait_on_recovery;
4900 case -NFS4ERR_LEASE_MOVED:
4901 nfs4_schedule_lease_moved_recovery(clp);
4902 goto wait_on_recovery;
4903 #if defined(CONFIG_NFS_V4_1)
4904 case -NFS4ERR_BADSESSION:
4905 case -NFS4ERR_BADSLOT:
4906 case -NFS4ERR_BAD_HIGH_SLOT:
4907 case -NFS4ERR_DEADSESSION:
4908 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4909 case -NFS4ERR_SEQ_FALSE_RETRY:
4910 case -NFS4ERR_SEQ_MISORDERED:
4911 dprintk("%s ERROR %d, Reset session\n", __func__,
4913 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4914 goto wait_on_recovery;
4915 #endif /* CONFIG_NFS_V4_1 */
4916 case -NFS4ERR_DELAY:
4917 nfs_inc_server_stats(server, NFSIOS_DELAY);
4918 rpc_delay(task, nfs4_update_delay(timeout));
4920 case -NFS4ERR_GRACE:
4921 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4922 case -NFS4ERR_RETRY_UNCACHED_REP:
4923 case -NFS4ERR_OLD_STATEID:
4926 task->tk_status = nfs4_map_errors(task->tk_status);
4929 task->tk_status = -EIO;
4932 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4933 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4934 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4935 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4936 goto recovery_failed;
4938 task->tk_status = 0;
4942 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4943 nfs4_verifier *bootverf)
4947 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4948 /* An impossible timestamp guarantees this value
4949 * will never match a generated boot time. */
4951 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
4953 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4954 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4955 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
4957 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4961 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
4966 bool retried = false;
4968 if (clp->cl_owner_id != NULL)
4972 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4973 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4975 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4979 if (len > NFS4_OPAQUE_LIMIT + 1)
4983 * Since this string is allocated at mount time, and held until the
4984 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4985 * about a memory-reclaim deadlock.
4987 str = kmalloc(len, GFP_KERNEL);
4992 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
4994 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
4995 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
4998 /* Did something change? */
4999 if (result >= len) {
5006 clp->cl_owner_id = str;
5011 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5017 len = 10 + 10 + 1 + 10 + 1 +
5018 strlen(nfs4_client_id_uniquifier) + 1 +
5019 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5021 if (len > NFS4_OPAQUE_LIMIT + 1)
5025 * Since this string is allocated at mount time, and held until the
5026 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5027 * about a memory-reclaim deadlock.
5029 str = kmalloc(len, GFP_KERNEL);
5033 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5034 clp->rpc_ops->version, clp->cl_minorversion,
5035 nfs4_client_id_uniquifier,
5036 clp->cl_rpcclient->cl_nodename);
5037 if (result >= len) {
5041 clp->cl_owner_id = str;
5046 nfs4_init_uniform_client_string(struct nfs_client *clp)
5052 if (clp->cl_owner_id != NULL)
5055 if (nfs4_client_id_uniquifier[0] != '\0')
5056 return nfs4_init_uniquifier_client_string(clp);
5058 len = 10 + 10 + 1 + 10 + 1 +
5059 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5061 if (len > NFS4_OPAQUE_LIMIT + 1)
5065 * Since this string is allocated at mount time, and held until the
5066 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5067 * about a memory-reclaim deadlock.
5069 str = kmalloc(len, GFP_KERNEL);
5073 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5074 clp->rpc_ops->version, clp->cl_minorversion,
5075 clp->cl_rpcclient->cl_nodename);
5076 if (result >= len) {
5080 clp->cl_owner_id = str;
5085 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5086 * services. Advertise one based on the address family of the
5090 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5092 if (strchr(clp->cl_ipaddr, ':') != NULL)
5093 return scnprintf(buf, len, "tcp6");
5095 return scnprintf(buf, len, "tcp");
5098 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5100 struct nfs4_setclientid *sc = calldata;
5102 if (task->tk_status == 0)
5103 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5106 static const struct rpc_call_ops nfs4_setclientid_ops = {
5107 .rpc_call_done = nfs4_setclientid_done,
5111 * nfs4_proc_setclientid - Negotiate client ID
5112 * @clp: state data structure
5113 * @program: RPC program for NFSv4 callback service
5114 * @port: IP port number for NFS4 callback service
5115 * @cred: RPC credential to use for this call
5116 * @res: where to place the result
5118 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5120 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5121 unsigned short port, struct rpc_cred *cred,
5122 struct nfs4_setclientid_res *res)
5124 nfs4_verifier sc_verifier;
5125 struct nfs4_setclientid setclientid = {
5126 .sc_verifier = &sc_verifier,
5130 struct rpc_message msg = {
5131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5132 .rpc_argp = &setclientid,
5136 struct rpc_task *task;
5137 struct rpc_task_setup task_setup_data = {
5138 .rpc_client = clp->cl_rpcclient,
5139 .rpc_message = &msg,
5140 .callback_ops = &nfs4_setclientid_ops,
5141 .callback_data = &setclientid,
5142 .flags = RPC_TASK_TIMEOUT,
5146 /* nfs_client_id4 */
5147 nfs4_init_boot_verifier(clp, &sc_verifier);
5149 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5150 status = nfs4_init_uniform_client_string(clp);
5152 status = nfs4_init_nonuniform_client_string(clp);
5158 setclientid.sc_netid_len =
5159 nfs4_init_callback_netid(clp,
5160 setclientid.sc_netid,
5161 sizeof(setclientid.sc_netid));
5162 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5163 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5164 clp->cl_ipaddr, port >> 8, port & 255);
5166 dprintk("NFS call setclientid auth=%s, '%s'\n",
5167 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5169 task = rpc_run_task(&task_setup_data);
5171 status = PTR_ERR(task);
5174 status = task->tk_status;
5175 if (setclientid.sc_cred) {
5176 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5177 put_rpccred(setclientid.sc_cred);
5181 trace_nfs4_setclientid(clp, status);
5182 dprintk("NFS reply setclientid: %d\n", status);
5187 * nfs4_proc_setclientid_confirm - Confirm client ID
5188 * @clp: state data structure
5189 * @res: result of a previous SETCLIENTID
5190 * @cred: RPC credential to use for this call
5192 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5194 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5195 struct nfs4_setclientid_res *arg,
5196 struct rpc_cred *cred)
5198 struct rpc_message msg = {
5199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5205 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5206 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5208 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5209 trace_nfs4_setclientid_confirm(clp, status);
5210 dprintk("NFS reply setclientid_confirm: %d\n", status);
5214 struct nfs4_delegreturndata {
5215 struct nfs4_delegreturnargs args;
5216 struct nfs4_delegreturnres res;
5218 nfs4_stateid stateid;
5219 unsigned long timestamp;
5220 struct nfs_fattr fattr;
5222 struct inode *inode;
5227 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5229 struct nfs4_delegreturndata *data = calldata;
5231 if (!nfs4_sequence_done(task, &data->res.seq_res))
5234 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5235 switch (task->tk_status) {
5237 renew_lease(data->res.server, data->timestamp);
5238 case -NFS4ERR_ADMIN_REVOKED:
5239 case -NFS4ERR_DELEG_REVOKED:
5240 case -NFS4ERR_BAD_STATEID:
5241 case -NFS4ERR_OLD_STATEID:
5242 case -NFS4ERR_STALE_STATEID:
5243 case -NFS4ERR_EXPIRED:
5244 task->tk_status = 0;
5246 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5249 if (nfs4_async_handle_error(task, data->res.server,
5250 NULL, NULL) == -EAGAIN) {
5251 rpc_restart_call_prepare(task);
5255 data->rpc_status = task->tk_status;
5258 static void nfs4_delegreturn_release(void *calldata)
5260 struct nfs4_delegreturndata *data = calldata;
5261 struct inode *inode = data->inode;
5265 pnfs_roc_release(inode);
5266 nfs_iput_and_deactive(inode);
5271 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5273 struct nfs4_delegreturndata *d_data;
5275 d_data = (struct nfs4_delegreturndata *)data;
5278 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5281 nfs4_setup_sequence(d_data->res.server,
5282 &d_data->args.seq_args,
5283 &d_data->res.seq_res,
5287 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5288 .rpc_call_prepare = nfs4_delegreturn_prepare,
5289 .rpc_call_done = nfs4_delegreturn_done,
5290 .rpc_release = nfs4_delegreturn_release,
5293 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5295 struct nfs4_delegreturndata *data;
5296 struct nfs_server *server = NFS_SERVER(inode);
5297 struct rpc_task *task;
5298 struct rpc_message msg = {
5299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5302 struct rpc_task_setup task_setup_data = {
5303 .rpc_client = server->client,
5304 .rpc_message = &msg,
5305 .callback_ops = &nfs4_delegreturn_ops,
5306 .flags = RPC_TASK_ASYNC,
5310 data = kzalloc(sizeof(*data), GFP_NOFS);
5313 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5314 data->args.fhandle = &data->fh;
5315 data->args.stateid = &data->stateid;
5316 data->args.bitmask = server->cache_consistency_bitmask;
5317 nfs_copy_fh(&data->fh, NFS_FH(inode));
5318 nfs4_stateid_copy(&data->stateid, stateid);
5319 data->res.fattr = &data->fattr;
5320 data->res.server = server;
5321 nfs_fattr_init(data->res.fattr);
5322 data->timestamp = jiffies;
5323 data->rpc_status = 0;
5324 data->inode = nfs_igrab_and_active(inode);
5326 data->roc = nfs4_roc(inode);
5328 task_setup_data.callback_data = data;
5329 msg.rpc_argp = &data->args;
5330 msg.rpc_resp = &data->res;
5331 task = rpc_run_task(&task_setup_data);
5333 return PTR_ERR(task);
5336 status = nfs4_wait_for_completion_rpc_task(task);
5339 status = data->rpc_status;
5341 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5343 nfs_refresh_inode(inode, &data->fattr);
5349 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5351 struct nfs_server *server = NFS_SERVER(inode);
5352 struct nfs4_exception exception = { };
5355 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5356 trace_nfs4_delegreturn(inode, err);
5358 case -NFS4ERR_STALE_STATEID:
5359 case -NFS4ERR_EXPIRED:
5363 err = nfs4_handle_exception(server, err, &exception);
5364 } while (exception.retry);
5368 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5369 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5372 * sleep, with exponential backoff, and retry the LOCK operation.
5374 static unsigned long
5375 nfs4_set_lock_task_retry(unsigned long timeout)
5377 freezable_schedule_timeout_killable_unsafe(timeout);
5379 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5380 return NFS4_LOCK_MAXTIMEOUT;
5384 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5386 struct inode *inode = state->inode;
5387 struct nfs_server *server = NFS_SERVER(inode);
5388 struct nfs_client *clp = server->nfs_client;
5389 struct nfs_lockt_args arg = {
5390 .fh = NFS_FH(inode),
5393 struct nfs_lockt_res res = {
5396 struct rpc_message msg = {
5397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5400 .rpc_cred = state->owner->so_cred,
5402 struct nfs4_lock_state *lsp;
5405 arg.lock_owner.clientid = clp->cl_clientid;
5406 status = nfs4_set_lock_state(state, request);
5409 lsp = request->fl_u.nfs4_fl.owner;
5410 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5411 arg.lock_owner.s_dev = server->s_dev;
5412 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5415 request->fl_type = F_UNLCK;
5417 case -NFS4ERR_DENIED:
5420 request->fl_ops->fl_release_private(request);
5421 request->fl_ops = NULL;
5426 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5428 struct nfs4_exception exception = { };
5432 err = _nfs4_proc_getlk(state, cmd, request);
5433 trace_nfs4_get_lock(request, state, cmd, err);
5434 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5436 } while (exception.retry);
5440 static int do_vfs_lock(struct file *file, struct file_lock *fl)
5443 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5445 res = posix_lock_file_wait(file, fl);
5448 res = flock_lock_file_wait(file, fl);
5456 struct nfs4_unlockdata {
5457 struct nfs_locku_args arg;
5458 struct nfs_locku_res res;
5459 struct nfs4_lock_state *lsp;
5460 struct nfs_open_context *ctx;
5461 struct file_lock fl;
5462 const struct nfs_server *server;
5463 unsigned long timestamp;
5466 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5467 struct nfs_open_context *ctx,
5468 struct nfs4_lock_state *lsp,
5469 struct nfs_seqid *seqid)
5471 struct nfs4_unlockdata *p;
5472 struct inode *inode = lsp->ls_state->inode;
5474 p = kzalloc(sizeof(*p), GFP_NOFS);
5477 p->arg.fh = NFS_FH(inode);
5479 p->arg.seqid = seqid;
5480 p->res.seqid = seqid;
5482 atomic_inc(&lsp->ls_count);
5483 /* Ensure we don't close file until we're done freeing locks! */
5484 p->ctx = get_nfs_open_context(ctx);
5485 memcpy(&p->fl, fl, sizeof(p->fl));
5486 p->server = NFS_SERVER(inode);
5490 static void nfs4_locku_release_calldata(void *data)
5492 struct nfs4_unlockdata *calldata = data;
5493 nfs_free_seqid(calldata->arg.seqid);
5494 nfs4_put_lock_state(calldata->lsp);
5495 put_nfs_open_context(calldata->ctx);
5499 static void nfs4_locku_done(struct rpc_task *task, void *data)
5501 struct nfs4_unlockdata *calldata = data;
5503 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5505 switch (task->tk_status) {
5507 renew_lease(calldata->server, calldata->timestamp);
5508 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5509 if (nfs4_update_lock_stateid(calldata->lsp,
5510 &calldata->res.stateid))
5512 case -NFS4ERR_BAD_STATEID:
5513 case -NFS4ERR_OLD_STATEID:
5514 case -NFS4ERR_STALE_STATEID:
5515 case -NFS4ERR_EXPIRED:
5516 if (!nfs4_stateid_match(&calldata->arg.stateid,
5517 &calldata->lsp->ls_stateid))
5518 rpc_restart_call_prepare(task);
5521 if (nfs4_async_handle_error(task, calldata->server,
5522 NULL, NULL) == -EAGAIN)
5523 rpc_restart_call_prepare(task);
5525 nfs_release_seqid(calldata->arg.seqid);
5528 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5530 struct nfs4_unlockdata *calldata = data;
5532 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5534 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5535 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5536 /* Note: exit _without_ running nfs4_locku_done */
5539 calldata->timestamp = jiffies;
5540 if (nfs4_setup_sequence(calldata->server,
5541 &calldata->arg.seq_args,
5542 &calldata->res.seq_res,
5544 nfs_release_seqid(calldata->arg.seqid);
5547 task->tk_action = NULL;
5549 nfs4_sequence_done(task, &calldata->res.seq_res);
5552 static const struct rpc_call_ops nfs4_locku_ops = {
5553 .rpc_call_prepare = nfs4_locku_prepare,
5554 .rpc_call_done = nfs4_locku_done,
5555 .rpc_release = nfs4_locku_release_calldata,
5558 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5559 struct nfs_open_context *ctx,
5560 struct nfs4_lock_state *lsp,
5561 struct nfs_seqid *seqid)
5563 struct nfs4_unlockdata *data;
5564 struct rpc_message msg = {
5565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5566 .rpc_cred = ctx->cred,
5568 struct rpc_task_setup task_setup_data = {
5569 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5570 .rpc_message = &msg,
5571 .callback_ops = &nfs4_locku_ops,
5572 .workqueue = nfsiod_workqueue,
5573 .flags = RPC_TASK_ASYNC,
5576 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5577 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5579 /* Ensure this is an unlock - when canceling a lock, the
5580 * canceled lock is passed in, and it won't be an unlock.
5582 fl->fl_type = F_UNLCK;
5584 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5586 nfs_free_seqid(seqid);
5587 return ERR_PTR(-ENOMEM);
5590 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5591 msg.rpc_argp = &data->arg;
5592 msg.rpc_resp = &data->res;
5593 task_setup_data.callback_data = data;
5594 return rpc_run_task(&task_setup_data);
5597 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5599 struct inode *inode = state->inode;
5600 struct nfs4_state_owner *sp = state->owner;
5601 struct nfs_inode *nfsi = NFS_I(inode);
5602 struct nfs_seqid *seqid;
5603 struct nfs4_lock_state *lsp;
5604 struct rpc_task *task;
5605 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5607 unsigned char fl_flags = request->fl_flags;
5609 status = nfs4_set_lock_state(state, request);
5610 /* Unlock _before_ we do the RPC call */
5611 request->fl_flags |= FL_EXISTS;
5612 /* Exclude nfs_delegation_claim_locks() */
5613 mutex_lock(&sp->so_delegreturn_mutex);
5614 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5615 down_read(&nfsi->rwsem);
5616 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5617 up_read(&nfsi->rwsem);
5618 mutex_unlock(&sp->so_delegreturn_mutex);
5621 up_read(&nfsi->rwsem);
5622 mutex_unlock(&sp->so_delegreturn_mutex);
5625 /* Is this a delegated lock? */
5626 lsp = request->fl_u.nfs4_fl.owner;
5627 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5629 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5630 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5634 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5635 status = PTR_ERR(task);
5638 status = nfs4_wait_for_completion_rpc_task(task);
5641 request->fl_flags = fl_flags;
5642 trace_nfs4_unlock(request, state, F_SETLK, status);
5646 struct nfs4_lockdata {
5647 struct nfs_lock_args arg;
5648 struct nfs_lock_res res;
5649 struct nfs4_lock_state *lsp;
5650 struct nfs_open_context *ctx;
5651 struct file_lock fl;
5652 unsigned long timestamp;
5655 struct nfs_server *server;
5658 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5659 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5662 struct nfs4_lockdata *p;
5663 struct inode *inode = lsp->ls_state->inode;
5664 struct nfs_server *server = NFS_SERVER(inode);
5665 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5667 p = kzalloc(sizeof(*p), gfp_mask);
5671 p->arg.fh = NFS_FH(inode);
5673 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5674 if (IS_ERR(p->arg.open_seqid))
5676 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5677 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5678 if (IS_ERR(p->arg.lock_seqid))
5679 goto out_free_seqid;
5680 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5681 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5682 p->arg.lock_owner.s_dev = server->s_dev;
5683 p->res.lock_seqid = p->arg.lock_seqid;
5686 atomic_inc(&lsp->ls_count);
5687 p->ctx = get_nfs_open_context(ctx);
5688 get_file(fl->fl_file);
5689 memcpy(&p->fl, fl, sizeof(p->fl));
5692 nfs_free_seqid(p->arg.open_seqid);
5698 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5700 struct nfs4_lockdata *data = calldata;
5701 struct nfs4_state *state = data->lsp->ls_state;
5703 dprintk("%s: begin!\n", __func__);
5704 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5706 /* Do we need to do an open_to_lock_owner? */
5707 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5708 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5709 goto out_release_lock_seqid;
5711 nfs4_stateid_copy(&data->arg.open_stateid,
5712 &state->open_stateid);
5713 data->arg.new_lock_owner = 1;
5714 data->res.open_seqid = data->arg.open_seqid;
5716 data->arg.new_lock_owner = 0;
5717 nfs4_stateid_copy(&data->arg.lock_stateid,
5718 &data->lsp->ls_stateid);
5720 if (!nfs4_valid_open_stateid(state)) {
5721 data->rpc_status = -EBADF;
5722 task->tk_action = NULL;
5723 goto out_release_open_seqid;
5725 data->timestamp = jiffies;
5726 if (nfs4_setup_sequence(data->server,
5727 &data->arg.seq_args,
5731 out_release_open_seqid:
5732 nfs_release_seqid(data->arg.open_seqid);
5733 out_release_lock_seqid:
5734 nfs_release_seqid(data->arg.lock_seqid);
5736 nfs4_sequence_done(task, &data->res.seq_res);
5737 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5740 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5742 struct nfs4_lockdata *data = calldata;
5743 struct nfs4_lock_state *lsp = data->lsp;
5745 dprintk("%s: begin!\n", __func__);
5747 if (!nfs4_sequence_done(task, &data->res.seq_res))
5750 data->rpc_status = task->tk_status;
5751 switch (task->tk_status) {
5753 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
5755 if (data->arg.new_lock) {
5756 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5757 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5758 rpc_restart_call_prepare(task);
5762 if (data->arg.new_lock_owner != 0) {
5763 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5764 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5765 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5766 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5767 rpc_restart_call_prepare(task);
5769 case -NFS4ERR_BAD_STATEID:
5770 case -NFS4ERR_OLD_STATEID:
5771 case -NFS4ERR_STALE_STATEID:
5772 case -NFS4ERR_EXPIRED:
5773 if (data->arg.new_lock_owner != 0) {
5774 if (!nfs4_stateid_match(&data->arg.open_stateid,
5775 &lsp->ls_state->open_stateid))
5776 rpc_restart_call_prepare(task);
5777 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5779 rpc_restart_call_prepare(task);
5781 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5784 static void nfs4_lock_release(void *calldata)
5786 struct nfs4_lockdata *data = calldata;
5788 dprintk("%s: begin!\n", __func__);
5789 nfs_free_seqid(data->arg.open_seqid);
5790 if (data->cancelled != 0) {
5791 struct rpc_task *task;
5792 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5793 data->arg.lock_seqid);
5795 rpc_put_task_async(task);
5796 dprintk("%s: cancelling lock!\n", __func__);
5798 nfs_free_seqid(data->arg.lock_seqid);
5799 nfs4_put_lock_state(data->lsp);
5800 put_nfs_open_context(data->ctx);
5801 fput(data->fl.fl_file);
5803 dprintk("%s: done!\n", __func__);
5806 static const struct rpc_call_ops nfs4_lock_ops = {
5807 .rpc_call_prepare = nfs4_lock_prepare,
5808 .rpc_call_done = nfs4_lock_done,
5809 .rpc_release = nfs4_lock_release,
5812 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5815 case -NFS4ERR_ADMIN_REVOKED:
5816 case -NFS4ERR_BAD_STATEID:
5817 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5818 if (new_lock_owner != 0 ||
5819 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5820 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5822 case -NFS4ERR_STALE_STATEID:
5823 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5824 case -NFS4ERR_EXPIRED:
5825 nfs4_schedule_lease_recovery(server->nfs_client);
5829 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5831 struct nfs4_lockdata *data;
5832 struct rpc_task *task;
5833 struct rpc_message msg = {
5834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5835 .rpc_cred = state->owner->so_cred,
5837 struct rpc_task_setup task_setup_data = {
5838 .rpc_client = NFS_CLIENT(state->inode),
5839 .rpc_message = &msg,
5840 .callback_ops = &nfs4_lock_ops,
5841 .workqueue = nfsiod_workqueue,
5842 .flags = RPC_TASK_ASYNC,
5846 dprintk("%s: begin!\n", __func__);
5847 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5848 fl->fl_u.nfs4_fl.owner,
5849 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5853 data->arg.block = 1;
5854 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5855 msg.rpc_argp = &data->arg;
5856 msg.rpc_resp = &data->res;
5857 task_setup_data.callback_data = data;
5858 if (recovery_type > NFS_LOCK_NEW) {
5859 if (recovery_type == NFS_LOCK_RECLAIM)
5860 data->arg.reclaim = NFS_LOCK_RECLAIM;
5861 nfs4_set_sequence_privileged(&data->arg.seq_args);
5863 data->arg.new_lock = 1;
5864 task = rpc_run_task(&task_setup_data);
5866 return PTR_ERR(task);
5867 ret = nfs4_wait_for_completion_rpc_task(task);
5869 ret = data->rpc_status;
5871 nfs4_handle_setlk_error(data->server, data->lsp,
5872 data->arg.new_lock_owner, ret);
5874 data->cancelled = 1;
5876 dprintk("%s: done, ret = %d!\n", __func__, ret);
5880 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5882 struct nfs_server *server = NFS_SERVER(state->inode);
5883 struct nfs4_exception exception = {
5884 .inode = state->inode,
5889 /* Cache the lock if possible... */
5890 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5892 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5893 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5894 if (err != -NFS4ERR_DELAY)
5896 nfs4_handle_exception(server, err, &exception);
5897 } while (exception.retry);
5901 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5903 struct nfs_server *server = NFS_SERVER(state->inode);
5904 struct nfs4_exception exception = {
5905 .inode = state->inode,
5909 err = nfs4_set_lock_state(state, request);
5912 if (!recover_lost_locks) {
5913 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5917 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5919 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5920 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5924 case -NFS4ERR_GRACE:
5925 case -NFS4ERR_DELAY:
5926 nfs4_handle_exception(server, err, &exception);
5929 } while (exception.retry);
5934 #if defined(CONFIG_NFS_V4_1)
5936 * nfs41_check_expired_locks - possibly free a lock stateid
5938 * @state: NFSv4 state for an inode
5940 * Returns NFS_OK if recovery for this stateid is now finished.
5941 * Otherwise a negative NFS4ERR value is returned.
5943 static int nfs41_check_expired_locks(struct nfs4_state *state)
5945 int status, ret = -NFS4ERR_BAD_STATEID;
5946 struct nfs4_lock_state *lsp;
5947 struct nfs_server *server = NFS_SERVER(state->inode);
5949 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5950 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5951 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5953 status = nfs41_test_stateid(server,
5956 trace_nfs4_test_lock_stateid(state, lsp, status);
5957 if (status != NFS_OK) {
5958 /* Free the stateid unless the server
5959 * informs us the stateid is unrecognized. */
5960 if (status != -NFS4ERR_BAD_STATEID)
5961 nfs41_free_stateid(server,
5964 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5973 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5975 int status = NFS_OK;
5977 if (test_bit(LK_STATE_IN_USE, &state->flags))
5978 status = nfs41_check_expired_locks(state);
5979 if (status != NFS_OK)
5980 status = nfs4_lock_expired(state, request);
5985 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5987 struct nfs_inode *nfsi = NFS_I(state->inode);
5988 unsigned char fl_flags = request->fl_flags;
5989 int status = -ENOLCK;
5991 if ((fl_flags & FL_POSIX) &&
5992 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5994 /* Is this a delegated open? */
5995 status = nfs4_set_lock_state(state, request);
5998 request->fl_flags |= FL_ACCESS;
5999 status = do_vfs_lock(request->fl_file, request);
6002 down_read(&nfsi->rwsem);
6003 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6004 /* Yes: cache locks! */
6005 /* ...but avoid races with delegation recall... */
6006 request->fl_flags = fl_flags & ~FL_SLEEP;
6007 status = do_vfs_lock(request->fl_file, request);
6008 up_read(&nfsi->rwsem);
6011 up_read(&nfsi->rwsem);
6012 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6014 request->fl_flags = fl_flags;
6018 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6020 struct nfs4_exception exception = {
6022 .inode = state->inode,
6027 err = _nfs4_proc_setlk(state, cmd, request);
6028 trace_nfs4_set_lock(request, state, cmd, err);
6029 if (err == -NFS4ERR_DENIED)
6031 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6033 } while (exception.retry);
6038 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6040 struct nfs_open_context *ctx;
6041 struct nfs4_state *state;
6042 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6045 /* verify open state */
6046 ctx = nfs_file_open_context(filp);
6049 if (request->fl_start < 0 || request->fl_end < 0)
6052 if (IS_GETLK(cmd)) {
6054 return nfs4_proc_getlk(state, F_GETLK, request);
6058 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6061 if (request->fl_type == F_UNLCK) {
6063 return nfs4_proc_unlck(state, cmd, request);
6070 * Don't rely on the VFS having checked the file open mode,
6071 * since it won't do this for flock() locks.
6073 switch (request->fl_type) {
6075 if (!(filp->f_mode & FMODE_READ))
6079 if (!(filp->f_mode & FMODE_WRITE))
6084 status = nfs4_proc_setlk(state, cmd, request);
6085 if ((status != -EAGAIN) || IS_SETLK(cmd))
6087 timeout = nfs4_set_lock_task_retry(timeout);
6088 status = -ERESTARTSYS;
6091 } while(status < 0);
6095 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6097 struct nfs_server *server = NFS_SERVER(state->inode);
6100 err = nfs4_set_lock_state(state, fl);
6103 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6104 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6107 struct nfs_release_lockowner_data {
6108 struct nfs4_lock_state *lsp;
6109 struct nfs_server *server;
6110 struct nfs_release_lockowner_args args;
6111 struct nfs_release_lockowner_res res;
6112 unsigned long timestamp;
6115 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6117 struct nfs_release_lockowner_data *data = calldata;
6118 struct nfs_server *server = data->server;
6119 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6120 &data->args.seq_args, &data->res.seq_res, task);
6121 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6122 data->timestamp = jiffies;
6125 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6127 struct nfs_release_lockowner_data *data = calldata;
6128 struct nfs_server *server = data->server;
6130 nfs40_sequence_done(task, &data->res.seq_res);
6132 switch (task->tk_status) {
6134 renew_lease(server, data->timestamp);
6136 case -NFS4ERR_STALE_CLIENTID:
6137 case -NFS4ERR_EXPIRED:
6138 nfs4_schedule_lease_recovery(server->nfs_client);
6140 case -NFS4ERR_LEASE_MOVED:
6141 case -NFS4ERR_DELAY:
6142 if (nfs4_async_handle_error(task, server,
6143 NULL, NULL) == -EAGAIN)
6144 rpc_restart_call_prepare(task);
6148 static void nfs4_release_lockowner_release(void *calldata)
6150 struct nfs_release_lockowner_data *data = calldata;
6151 nfs4_free_lock_state(data->server, data->lsp);
6155 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6156 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6157 .rpc_call_done = nfs4_release_lockowner_done,
6158 .rpc_release = nfs4_release_lockowner_release,
6162 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6164 struct nfs_release_lockowner_data *data;
6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6169 if (server->nfs_client->cl_mvops->minor_version != 0)
6172 data = kmalloc(sizeof(*data), GFP_NOFS);
6176 data->server = server;
6177 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6178 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6179 data->args.lock_owner.s_dev = server->s_dev;
6181 msg.rpc_argp = &data->args;
6182 msg.rpc_resp = &data->res;
6183 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6184 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6187 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6189 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6190 const void *buf, size_t buflen,
6191 int flags, int type)
6193 if (strcmp(key, "") != 0)
6196 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6199 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6200 void *buf, size_t buflen, int type)
6202 if (strcmp(key, "") != 0)
6205 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6208 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6209 size_t list_len, const char *name,
6210 size_t name_len, int type)
6212 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6214 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
6217 if (list && len <= list_len)
6218 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6222 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6223 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6225 return server->caps & NFS_CAP_SECURITY_LABEL;
6228 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6229 const void *buf, size_t buflen,
6230 int flags, int type)
6232 if (security_ismaclabel(key))
6233 return nfs4_set_security_label(dentry, buf, buflen);
6238 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6239 void *buf, size_t buflen, int type)
6241 if (security_ismaclabel(key))
6242 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6246 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6247 size_t list_len, const char *name,
6248 size_t name_len, int type)
6252 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6253 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
6254 if (list && len <= list_len)
6255 security_inode_listsecurity(d_inode(dentry), list, len);
6260 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6261 .prefix = XATTR_SECURITY_PREFIX,
6262 .list = nfs4_xattr_list_nfs4_label,
6263 .get = nfs4_xattr_get_nfs4_label,
6264 .set = nfs4_xattr_set_nfs4_label,
6270 * nfs_fhget will use either the mounted_on_fileid or the fileid
6272 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6274 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6275 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6276 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6277 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6280 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6281 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6282 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6286 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6287 const struct qstr *name,
6288 struct nfs4_fs_locations *fs_locations,
6291 struct nfs_server *server = NFS_SERVER(dir);
6293 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6295 struct nfs4_fs_locations_arg args = {
6296 .dir_fh = NFS_FH(dir),
6301 struct nfs4_fs_locations_res res = {
6302 .fs_locations = fs_locations,
6304 struct rpc_message msg = {
6305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6311 dprintk("%s: start\n", __func__);
6313 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6314 * is not supported */
6315 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6316 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6318 bitmask[0] |= FATTR4_WORD0_FILEID;
6320 nfs_fattr_init(&fs_locations->fattr);
6321 fs_locations->server = server;
6322 fs_locations->nlocations = 0;
6323 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6324 dprintk("%s: returned status = %d\n", __func__, status);
6328 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6329 const struct qstr *name,
6330 struct nfs4_fs_locations *fs_locations,
6333 struct nfs4_exception exception = { };
6336 err = _nfs4_proc_fs_locations(client, dir, name,
6337 fs_locations, page);
6338 trace_nfs4_get_fs_locations(dir, name, err);
6339 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6341 } while (exception.retry);
6346 * This operation also signals the server that this client is
6347 * performing migration recovery. The server can stop returning
6348 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6349 * appended to this compound to identify the client ID which is
6350 * performing recovery.
6352 static int _nfs40_proc_get_locations(struct inode *inode,
6353 struct nfs4_fs_locations *locations,
6354 struct page *page, struct rpc_cred *cred)
6356 struct nfs_server *server = NFS_SERVER(inode);
6357 struct rpc_clnt *clnt = server->client;
6359 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6361 struct nfs4_fs_locations_arg args = {
6362 .clientid = server->nfs_client->cl_clientid,
6363 .fh = NFS_FH(inode),
6366 .migration = 1, /* skip LOOKUP */
6367 .renew = 1, /* append RENEW */
6369 struct nfs4_fs_locations_res res = {
6370 .fs_locations = locations,
6374 struct rpc_message msg = {
6375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6380 unsigned long now = jiffies;
6383 nfs_fattr_init(&locations->fattr);
6384 locations->server = server;
6385 locations->nlocations = 0;
6387 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6388 nfs4_set_sequence_privileged(&args.seq_args);
6389 status = nfs4_call_sync_sequence(clnt, server, &msg,
6390 &args.seq_args, &res.seq_res);
6394 renew_lease(server, now);
6398 #ifdef CONFIG_NFS_V4_1
6401 * This operation also signals the server that this client is
6402 * performing migration recovery. The server can stop asserting
6403 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6404 * performing this operation is identified in the SEQUENCE
6405 * operation in this compound.
6407 * When the client supports GETATTR(fs_locations_info), it can
6408 * be plumbed in here.
6410 static int _nfs41_proc_get_locations(struct inode *inode,
6411 struct nfs4_fs_locations *locations,
6412 struct page *page, struct rpc_cred *cred)
6414 struct nfs_server *server = NFS_SERVER(inode);
6415 struct rpc_clnt *clnt = server->client;
6417 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6419 struct nfs4_fs_locations_arg args = {
6420 .fh = NFS_FH(inode),
6423 .migration = 1, /* skip LOOKUP */
6425 struct nfs4_fs_locations_res res = {
6426 .fs_locations = locations,
6429 struct rpc_message msg = {
6430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6437 nfs_fattr_init(&locations->fattr);
6438 locations->server = server;
6439 locations->nlocations = 0;
6441 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6442 nfs4_set_sequence_privileged(&args.seq_args);
6443 status = nfs4_call_sync_sequence(clnt, server, &msg,
6444 &args.seq_args, &res.seq_res);
6445 if (status == NFS4_OK &&
6446 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6447 status = -NFS4ERR_LEASE_MOVED;
6451 #endif /* CONFIG_NFS_V4_1 */
6454 * nfs4_proc_get_locations - discover locations for a migrated FSID
6455 * @inode: inode on FSID that is migrating
6456 * @locations: result of query
6458 * @cred: credential to use for this operation
6460 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6461 * operation failed, or a negative errno if a local error occurred.
6463 * On success, "locations" is filled in, but if the server has
6464 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6467 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6468 * from this client that require migration recovery.
6470 int nfs4_proc_get_locations(struct inode *inode,
6471 struct nfs4_fs_locations *locations,
6472 struct page *page, struct rpc_cred *cred)
6474 struct nfs_server *server = NFS_SERVER(inode);
6475 struct nfs_client *clp = server->nfs_client;
6476 const struct nfs4_mig_recovery_ops *ops =
6477 clp->cl_mvops->mig_recovery_ops;
6478 struct nfs4_exception exception = { };
6481 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6482 (unsigned long long)server->fsid.major,
6483 (unsigned long long)server->fsid.minor,
6485 nfs_display_fhandle(NFS_FH(inode), __func__);
6488 status = ops->get_locations(inode, locations, page, cred);
6489 if (status != -NFS4ERR_DELAY)
6491 nfs4_handle_exception(server, status, &exception);
6492 } while (exception.retry);
6497 * This operation also signals the server that this client is
6498 * performing "lease moved" recovery. The server can stop
6499 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6500 * is appended to this compound to identify the client ID which is
6501 * performing recovery.
6503 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6505 struct nfs_server *server = NFS_SERVER(inode);
6506 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6507 struct rpc_clnt *clnt = server->client;
6508 struct nfs4_fsid_present_arg args = {
6509 .fh = NFS_FH(inode),
6510 .clientid = clp->cl_clientid,
6511 .renew = 1, /* append RENEW */
6513 struct nfs4_fsid_present_res res = {
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6522 unsigned long now = jiffies;
6525 res.fh = nfs_alloc_fhandle();
6529 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6530 nfs4_set_sequence_privileged(&args.seq_args);
6531 status = nfs4_call_sync_sequence(clnt, server, &msg,
6532 &args.seq_args, &res.seq_res);
6533 nfs_free_fhandle(res.fh);
6537 do_renew_lease(clp, now);
6541 #ifdef CONFIG_NFS_V4_1
6544 * This operation also signals the server that this client is
6545 * performing "lease moved" recovery. The server can stop asserting
6546 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6547 * this operation is identified in the SEQUENCE operation in this
6550 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6552 struct nfs_server *server = NFS_SERVER(inode);
6553 struct rpc_clnt *clnt = server->client;
6554 struct nfs4_fsid_present_arg args = {
6555 .fh = NFS_FH(inode),
6557 struct nfs4_fsid_present_res res = {
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6567 res.fh = nfs_alloc_fhandle();
6571 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6572 nfs4_set_sequence_privileged(&args.seq_args);
6573 status = nfs4_call_sync_sequence(clnt, server, &msg,
6574 &args.seq_args, &res.seq_res);
6575 nfs_free_fhandle(res.fh);
6576 if (status == NFS4_OK &&
6577 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6578 status = -NFS4ERR_LEASE_MOVED;
6582 #endif /* CONFIG_NFS_V4_1 */
6585 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6586 * @inode: inode on FSID to check
6587 * @cred: credential to use for this operation
6589 * Server indicates whether the FSID is present, moved, or not
6590 * recognized. This operation is necessary to clear a LEASE_MOVED
6591 * condition for this client ID.
6593 * Returns NFS4_OK if the FSID is present on this server,
6594 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6595 * NFS4ERR code if some error occurred on the server, or a
6596 * negative errno if a local failure occurred.
6598 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6600 struct nfs_server *server = NFS_SERVER(inode);
6601 struct nfs_client *clp = server->nfs_client;
6602 const struct nfs4_mig_recovery_ops *ops =
6603 clp->cl_mvops->mig_recovery_ops;
6604 struct nfs4_exception exception = { };
6607 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6608 (unsigned long long)server->fsid.major,
6609 (unsigned long long)server->fsid.minor,
6611 nfs_display_fhandle(NFS_FH(inode), __func__);
6614 status = ops->fsid_present(inode, cred);
6615 if (status != -NFS4ERR_DELAY)
6617 nfs4_handle_exception(server, status, &exception);
6618 } while (exception.retry);
6623 * If 'use_integrity' is true and the state managment nfs_client
6624 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6625 * and the machine credential as per RFC3530bis and RFC5661 Security
6626 * Considerations sections. Otherwise, just use the user cred with the
6627 * filesystem's rpc_client.
6629 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6632 struct nfs4_secinfo_arg args = {
6633 .dir_fh = NFS_FH(dir),
6636 struct nfs4_secinfo_res res = {
6639 struct rpc_message msg = {
6640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6644 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6645 struct rpc_cred *cred = NULL;
6647 if (use_integrity) {
6648 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6649 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6650 msg.rpc_cred = cred;
6653 dprintk("NFS call secinfo %s\n", name->name);
6655 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6656 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6658 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6660 dprintk("NFS reply secinfo: %d\n", status);
6668 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6669 struct nfs4_secinfo_flavors *flavors)
6671 struct nfs4_exception exception = { };
6674 err = -NFS4ERR_WRONGSEC;
6676 /* try to use integrity protection with machine cred */
6677 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6678 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6681 * if unable to use integrity protection, or SECINFO with
6682 * integrity protection returns NFS4ERR_WRONGSEC (which is
6683 * disallowed by spec, but exists in deployed servers) use
6684 * the current filesystem's rpc_client and the user cred.
6686 if (err == -NFS4ERR_WRONGSEC)
6687 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6689 trace_nfs4_secinfo(dir, name, err);
6690 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6692 } while (exception.retry);
6696 #ifdef CONFIG_NFS_V4_1
6698 * Check the exchange flags returned by the server for invalid flags, having
6699 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6702 static int nfs4_check_cl_exchange_flags(u32 flags)
6704 if (flags & ~EXCHGID4_FLAG_MASK_R)
6706 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6707 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6709 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6713 return -NFS4ERR_INVAL;
6717 nfs41_same_server_scope(struct nfs41_server_scope *a,
6718 struct nfs41_server_scope *b)
6720 if (a->server_scope_sz == b->server_scope_sz &&
6721 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6728 * nfs4_proc_bind_conn_to_session()
6730 * The 4.1 client currently uses the same TCP connection for the
6731 * fore and backchannel.
6733 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6736 struct nfs41_bind_conn_to_session_args args = {
6738 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6740 struct nfs41_bind_conn_to_session_res res;
6741 struct rpc_message msg = {
6743 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6749 dprintk("--> %s\n", __func__);
6751 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6752 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6753 args.dir = NFS4_CDFC4_FORE;
6755 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6756 trace_nfs4_bind_conn_to_session(clp, status);
6758 if (memcmp(res.sessionid.data,
6759 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6760 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6764 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6765 dprintk("NFS: %s: Unexpected direction from server\n",
6770 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6771 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6778 dprintk("<-- %s status= %d\n", __func__, status);
6783 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6784 * and operations we'd like to see to enable certain features in the allow map
6786 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6787 .how = SP4_MACH_CRED,
6788 .enforce.u.words = {
6789 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6790 1 << (OP_EXCHANGE_ID - 32) |
6791 1 << (OP_CREATE_SESSION - 32) |
6792 1 << (OP_DESTROY_SESSION - 32) |
6793 1 << (OP_DESTROY_CLIENTID - 32)
6796 [0] = 1 << (OP_CLOSE) |
6799 [1] = 1 << (OP_SECINFO - 32) |
6800 1 << (OP_SECINFO_NO_NAME - 32) |
6801 1 << (OP_TEST_STATEID - 32) |
6802 1 << (OP_FREE_STATEID - 32) |
6803 1 << (OP_WRITE - 32)
6808 * Select the state protection mode for client `clp' given the server results
6809 * from exchange_id in `sp'.
6811 * Returns 0 on success, negative errno otherwise.
6813 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6814 struct nfs41_state_protection *sp)
6816 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6817 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6818 1 << (OP_EXCHANGE_ID - 32) |
6819 1 << (OP_CREATE_SESSION - 32) |
6820 1 << (OP_DESTROY_SESSION - 32) |
6821 1 << (OP_DESTROY_CLIENTID - 32)
6825 if (sp->how == SP4_MACH_CRED) {
6826 /* Print state protect result */
6827 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6828 for (i = 0; i <= LAST_NFS4_OP; i++) {
6829 if (test_bit(i, sp->enforce.u.longs))
6830 dfprintk(MOUNT, " enforce op %d\n", i);
6831 if (test_bit(i, sp->allow.u.longs))
6832 dfprintk(MOUNT, " allow op %d\n", i);
6835 /* make sure nothing is on enforce list that isn't supported */
6836 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6837 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6838 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6844 * Minimal mode - state operations are allowed to use machine
6845 * credential. Note this already happens by default, so the
6846 * client doesn't have to do anything more than the negotiation.
6848 * NOTE: we don't care if EXCHANGE_ID is in the list -
6849 * we're already using the machine cred for exchange_id
6850 * and will never use a different cred.
6852 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6853 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6854 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6855 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6856 dfprintk(MOUNT, "sp4_mach_cred:\n");
6857 dfprintk(MOUNT, " minimal mode enabled\n");
6858 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6860 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6864 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6865 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6866 dfprintk(MOUNT, " cleanup mode enabled\n");
6867 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6870 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6871 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6872 dfprintk(MOUNT, " secinfo mode enabled\n");
6873 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6876 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6877 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6878 dfprintk(MOUNT, " stateid mode enabled\n");
6879 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6882 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6883 dfprintk(MOUNT, " write mode enabled\n");
6884 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6887 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6888 dfprintk(MOUNT, " commit mode enabled\n");
6889 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6897 * _nfs4_proc_exchange_id()
6899 * Wrapper for EXCHANGE_ID operation.
6901 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6904 nfs4_verifier verifier;
6905 struct nfs41_exchange_id_args args = {
6906 .verifier = &verifier,
6908 #ifdef CONFIG_NFS_V4_1_MIGRATION
6909 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6910 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6911 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6913 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6914 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6917 struct nfs41_exchange_id_res res = {
6921 struct rpc_message msg = {
6922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6928 nfs4_init_boot_verifier(clp, &verifier);
6930 status = nfs4_init_uniform_client_string(clp);
6934 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6935 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6938 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
6940 if (unlikely(res.server_owner == NULL)) {
6945 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
6947 if (unlikely(res.server_scope == NULL)) {
6949 goto out_server_owner;
6952 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
6953 if (unlikely(res.impl_id == NULL)) {
6955 goto out_server_scope;
6960 args.state_protect.how = SP4_NONE;
6964 args.state_protect = nfs4_sp4_mach_cred_request;
6971 goto out_server_scope;
6974 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6975 trace_nfs4_exchange_id(clp, status);
6977 status = nfs4_check_cl_exchange_flags(res.flags);
6980 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6983 clp->cl_clientid = res.clientid;
6984 clp->cl_exchange_flags = res.flags;
6985 /* Client ID is not confirmed */
6986 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6987 clear_bit(NFS4_SESSION_ESTABLISHED,
6988 &clp->cl_session->session_state);
6989 clp->cl_seqid = res.seqid;
6992 kfree(clp->cl_serverowner);
6993 clp->cl_serverowner = res.server_owner;
6994 res.server_owner = NULL;
6996 /* use the most recent implementation id */
6997 kfree(clp->cl_implid);
6998 clp->cl_implid = res.impl_id;
7000 if (clp->cl_serverscope != NULL &&
7001 !nfs41_same_server_scope(clp->cl_serverscope,
7002 res.server_scope)) {
7003 dprintk("%s: server_scope mismatch detected\n",
7005 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7006 kfree(clp->cl_serverscope);
7007 clp->cl_serverscope = NULL;
7010 if (clp->cl_serverscope == NULL) {
7011 clp->cl_serverscope = res.server_scope;
7018 kfree(res.server_owner);
7020 kfree(res.server_scope);
7022 if (clp->cl_implid != NULL)
7023 dprintk("NFS reply exchange_id: Server Implementation ID: "
7024 "domain: %s, name: %s, date: %llu,%u\n",
7025 clp->cl_implid->domain, clp->cl_implid->name,
7026 clp->cl_implid->date.seconds,
7027 clp->cl_implid->date.nseconds);
7028 dprintk("NFS reply exchange_id: %d\n", status);
7033 * nfs4_proc_exchange_id()
7035 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7037 * Since the clientid has expired, all compounds using sessions
7038 * associated with the stale clientid will be returning
7039 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7040 * be in some phase of session reset.
7042 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7044 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7046 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7049 /* try SP4_MACH_CRED if krb5i/p */
7050 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7051 authflavor == RPC_AUTH_GSS_KRB5P) {
7052 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7058 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7061 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7062 struct rpc_cred *cred)
7064 struct rpc_message msg = {
7065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7071 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7072 trace_nfs4_destroy_clientid(clp, status);
7074 dprintk("NFS: Got error %d from the server %s on "
7075 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7079 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7080 struct rpc_cred *cred)
7085 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7086 ret = _nfs4_proc_destroy_clientid(clp, cred);
7088 case -NFS4ERR_DELAY:
7089 case -NFS4ERR_CLIENTID_BUSY:
7099 int nfs4_destroy_clientid(struct nfs_client *clp)
7101 struct rpc_cred *cred;
7104 if (clp->cl_mvops->minor_version < 1)
7106 if (clp->cl_exchange_flags == 0)
7108 if (clp->cl_preserve_clid)
7110 cred = nfs4_get_clid_cred(clp);
7111 ret = nfs4_proc_destroy_clientid(clp, cred);
7116 case -NFS4ERR_STALE_CLIENTID:
7117 clp->cl_exchange_flags = 0;
7123 struct nfs4_get_lease_time_data {
7124 struct nfs4_get_lease_time_args *args;
7125 struct nfs4_get_lease_time_res *res;
7126 struct nfs_client *clp;
7129 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7132 struct nfs4_get_lease_time_data *data =
7133 (struct nfs4_get_lease_time_data *)calldata;
7135 dprintk("--> %s\n", __func__);
7136 /* just setup sequence, do not trigger session recovery
7137 since we're invoked within one */
7138 nfs41_setup_sequence(data->clp->cl_session,
7139 &data->args->la_seq_args,
7140 &data->res->lr_seq_res,
7142 dprintk("<-- %s\n", __func__);
7146 * Called from nfs4_state_manager thread for session setup, so don't recover
7147 * from sequence operation or clientid errors.
7149 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7151 struct nfs4_get_lease_time_data *data =
7152 (struct nfs4_get_lease_time_data *)calldata;
7154 dprintk("--> %s\n", __func__);
7155 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7157 switch (task->tk_status) {
7158 case -NFS4ERR_DELAY:
7159 case -NFS4ERR_GRACE:
7160 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7161 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7162 task->tk_status = 0;
7164 case -NFS4ERR_RETRY_UNCACHED_REP:
7165 rpc_restart_call_prepare(task);
7168 dprintk("<-- %s\n", __func__);
7171 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7172 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7173 .rpc_call_done = nfs4_get_lease_time_done,
7176 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7178 struct rpc_task *task;
7179 struct nfs4_get_lease_time_args args;
7180 struct nfs4_get_lease_time_res res = {
7181 .lr_fsinfo = fsinfo,
7183 struct nfs4_get_lease_time_data data = {
7188 struct rpc_message msg = {
7189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7193 struct rpc_task_setup task_setup = {
7194 .rpc_client = clp->cl_rpcclient,
7195 .rpc_message = &msg,
7196 .callback_ops = &nfs4_get_lease_time_ops,
7197 .callback_data = &data,
7198 .flags = RPC_TASK_TIMEOUT,
7202 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7203 nfs4_set_sequence_privileged(&args.la_seq_args);
7204 dprintk("--> %s\n", __func__);
7205 task = rpc_run_task(&task_setup);
7208 status = PTR_ERR(task);
7210 status = task->tk_status;
7213 dprintk("<-- %s return %d\n", __func__, status);
7219 * Initialize the values to be used by the client in CREATE_SESSION
7220 * If nfs4_init_session set the fore channel request and response sizes,
7223 * Set the back channel max_resp_sz_cached to zero to force the client to
7224 * always set csa_cachethis to FALSE because the current implementation
7225 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7227 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7229 unsigned int max_rqst_sz, max_resp_sz;
7231 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7232 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7234 /* Fore channel attributes */
7235 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7236 args->fc_attrs.max_resp_sz = max_resp_sz;
7237 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7238 args->fc_attrs.max_reqs = max_session_slots;
7240 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7241 "max_ops=%u max_reqs=%u\n",
7243 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7244 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7246 /* Back channel attributes */
7247 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7248 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7249 args->bc_attrs.max_resp_sz_cached = 0;
7250 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7251 args->bc_attrs.max_reqs = 1;
7253 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7254 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7256 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7257 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7258 args->bc_attrs.max_reqs);
7261 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7262 struct nfs41_create_session_res *res)
7264 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7265 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7267 if (rcvd->max_resp_sz > sent->max_resp_sz)
7270 * Our requested max_ops is the minimum we need; we're not
7271 * prepared to break up compounds into smaller pieces than that.
7272 * So, no point even trying to continue if the server won't
7275 if (rcvd->max_ops < sent->max_ops)
7277 if (rcvd->max_reqs == 0)
7279 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7280 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7284 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7285 struct nfs41_create_session_res *res)
7287 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7288 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7290 if (!(res->flags & SESSION4_BACK_CHAN))
7292 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7294 if (rcvd->max_resp_sz < sent->max_resp_sz)
7296 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7298 /* These would render the backchannel useless: */
7299 if (rcvd->max_ops != sent->max_ops)
7301 if (rcvd->max_reqs != sent->max_reqs)
7307 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7308 struct nfs41_create_session_res *res)
7312 ret = nfs4_verify_fore_channel_attrs(args, res);
7315 return nfs4_verify_back_channel_attrs(args, res);
7318 static void nfs4_update_session(struct nfs4_session *session,
7319 struct nfs41_create_session_res *res)
7321 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7322 /* Mark client id and session as being confirmed */
7323 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7324 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7325 session->flags = res->flags;
7326 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7327 if (res->flags & SESSION4_BACK_CHAN)
7328 memcpy(&session->bc_attrs, &res->bc_attrs,
7329 sizeof(session->bc_attrs));
7332 static int _nfs4_proc_create_session(struct nfs_client *clp,
7333 struct rpc_cred *cred)
7335 struct nfs4_session *session = clp->cl_session;
7336 struct nfs41_create_session_args args = {
7338 .clientid = clp->cl_clientid,
7339 .seqid = clp->cl_seqid,
7340 .cb_program = NFS4_CALLBACK,
7342 struct nfs41_create_session_res res;
7344 struct rpc_message msg = {
7345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7352 nfs4_init_channel_attrs(&args);
7353 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7355 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7356 trace_nfs4_create_session(clp, status);
7359 /* Verify the session's negotiated channel_attrs values */
7360 status = nfs4_verify_channel_attrs(&args, &res);
7361 /* Increment the clientid slot sequence id */
7362 if (clp->cl_seqid == res.seqid)
7366 nfs4_update_session(session, &res);
7373 * Issues a CREATE_SESSION operation to the server.
7374 * It is the responsibility of the caller to verify the session is
7375 * expired before calling this routine.
7377 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7381 struct nfs4_session *session = clp->cl_session;
7383 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7385 status = _nfs4_proc_create_session(clp, cred);
7389 /* Init or reset the session slot tables */
7390 status = nfs4_setup_session_slot_tables(session);
7391 dprintk("slot table setup returned %d\n", status);
7395 ptr = (unsigned *)&session->sess_id.data[0];
7396 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7397 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7399 dprintk("<-- %s\n", __func__);
7404 * Issue the over-the-wire RPC DESTROY_SESSION.
7405 * The caller must serialize access to this routine.
7407 int nfs4_proc_destroy_session(struct nfs4_session *session,
7408 struct rpc_cred *cred)
7410 struct rpc_message msg = {
7411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7412 .rpc_argp = session,
7417 dprintk("--> nfs4_proc_destroy_session\n");
7419 /* session is still being setup */
7420 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7423 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7424 trace_nfs4_destroy_session(session->clp, status);
7427 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7428 "Session has been destroyed regardless...\n", status);
7430 dprintk("<-- nfs4_proc_destroy_session\n");
7435 * Renew the cl_session lease.
7437 struct nfs4_sequence_data {
7438 struct nfs_client *clp;
7439 struct nfs4_sequence_args args;
7440 struct nfs4_sequence_res res;
7443 static void nfs41_sequence_release(void *data)
7445 struct nfs4_sequence_data *calldata = data;
7446 struct nfs_client *clp = calldata->clp;
7448 if (atomic_read(&clp->cl_count) > 1)
7449 nfs4_schedule_state_renewal(clp);
7450 nfs_put_client(clp);
7454 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7456 switch(task->tk_status) {
7457 case -NFS4ERR_DELAY:
7458 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7461 nfs4_schedule_lease_recovery(clp);
7466 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7468 struct nfs4_sequence_data *calldata = data;
7469 struct nfs_client *clp = calldata->clp;
7471 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7474 trace_nfs4_sequence(clp, task->tk_status);
7475 if (task->tk_status < 0) {
7476 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7477 if (atomic_read(&clp->cl_count) == 1)
7480 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7481 rpc_restart_call_prepare(task);
7485 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7487 dprintk("<-- %s\n", __func__);
7490 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7492 struct nfs4_sequence_data *calldata = data;
7493 struct nfs_client *clp = calldata->clp;
7494 struct nfs4_sequence_args *args;
7495 struct nfs4_sequence_res *res;
7497 args = task->tk_msg.rpc_argp;
7498 res = task->tk_msg.rpc_resp;
7500 nfs41_setup_sequence(clp->cl_session, args, res, task);
7503 static const struct rpc_call_ops nfs41_sequence_ops = {
7504 .rpc_call_done = nfs41_sequence_call_done,
7505 .rpc_call_prepare = nfs41_sequence_prepare,
7506 .rpc_release = nfs41_sequence_release,
7509 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7510 struct rpc_cred *cred,
7513 struct nfs4_sequence_data *calldata;
7514 struct rpc_message msg = {
7515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7518 struct rpc_task_setup task_setup_data = {
7519 .rpc_client = clp->cl_rpcclient,
7520 .rpc_message = &msg,
7521 .callback_ops = &nfs41_sequence_ops,
7522 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7525 if (!atomic_inc_not_zero(&clp->cl_count))
7526 return ERR_PTR(-EIO);
7527 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7528 if (calldata == NULL) {
7529 nfs_put_client(clp);
7530 return ERR_PTR(-ENOMEM);
7532 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7534 nfs4_set_sequence_privileged(&calldata->args);
7535 msg.rpc_argp = &calldata->args;
7536 msg.rpc_resp = &calldata->res;
7537 calldata->clp = clp;
7538 task_setup_data.callback_data = calldata;
7540 return rpc_run_task(&task_setup_data);
7543 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7545 struct rpc_task *task;
7548 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7550 task = _nfs41_proc_sequence(clp, cred, false);
7552 ret = PTR_ERR(task);
7554 rpc_put_task_async(task);
7555 dprintk("<-- %s status=%d\n", __func__, ret);
7559 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7561 struct rpc_task *task;
7564 task = _nfs41_proc_sequence(clp, cred, true);
7566 ret = PTR_ERR(task);
7569 ret = rpc_wait_for_completion_task(task);
7571 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7573 if (task->tk_status == 0)
7574 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
7575 ret = task->tk_status;
7579 dprintk("<-- %s status=%d\n", __func__, ret);
7583 struct nfs4_reclaim_complete_data {
7584 struct nfs_client *clp;
7585 struct nfs41_reclaim_complete_args arg;
7586 struct nfs41_reclaim_complete_res res;
7589 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7591 struct nfs4_reclaim_complete_data *calldata = data;
7593 nfs41_setup_sequence(calldata->clp->cl_session,
7594 &calldata->arg.seq_args,
7595 &calldata->res.seq_res,
7599 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7601 switch(task->tk_status) {
7603 case -NFS4ERR_COMPLETE_ALREADY:
7604 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7606 case -NFS4ERR_DELAY:
7607 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7609 case -NFS4ERR_RETRY_UNCACHED_REP:
7612 nfs4_schedule_lease_recovery(clp);
7617 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7619 struct nfs4_reclaim_complete_data *calldata = data;
7620 struct nfs_client *clp = calldata->clp;
7621 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7623 dprintk("--> %s\n", __func__);
7624 if (!nfs41_sequence_done(task, res))
7627 trace_nfs4_reclaim_complete(clp, task->tk_status);
7628 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7629 rpc_restart_call_prepare(task);
7632 dprintk("<-- %s\n", __func__);
7635 static void nfs4_free_reclaim_complete_data(void *data)
7637 struct nfs4_reclaim_complete_data *calldata = data;
7642 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7643 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7644 .rpc_call_done = nfs4_reclaim_complete_done,
7645 .rpc_release = nfs4_free_reclaim_complete_data,
7649 * Issue a global reclaim complete.
7651 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7652 struct rpc_cred *cred)
7654 struct nfs4_reclaim_complete_data *calldata;
7655 struct rpc_task *task;
7656 struct rpc_message msg = {
7657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7660 struct rpc_task_setup task_setup_data = {
7661 .rpc_client = clp->cl_rpcclient,
7662 .rpc_message = &msg,
7663 .callback_ops = &nfs4_reclaim_complete_call_ops,
7664 .flags = RPC_TASK_ASYNC,
7666 int status = -ENOMEM;
7668 dprintk("--> %s\n", __func__);
7669 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7670 if (calldata == NULL)
7672 calldata->clp = clp;
7673 calldata->arg.one_fs = 0;
7675 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7676 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7677 msg.rpc_argp = &calldata->arg;
7678 msg.rpc_resp = &calldata->res;
7679 task_setup_data.callback_data = calldata;
7680 task = rpc_run_task(&task_setup_data);
7682 status = PTR_ERR(task);
7685 status = nfs4_wait_for_completion_rpc_task(task);
7687 status = task->tk_status;
7691 dprintk("<-- %s status=%d\n", __func__, status);
7696 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7698 struct nfs4_layoutget *lgp = calldata;
7699 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7700 struct nfs4_session *session = nfs4_get_session(server);
7702 dprintk("--> %s\n", __func__);
7703 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7704 * right now covering the LAYOUTGET we are about to send.
7705 * However, that is not so catastrophic, and there seems
7706 * to be no way to prevent it completely.
7708 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7709 &lgp->res.seq_res, task))
7711 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7712 NFS_I(lgp->args.inode)->layout,
7714 lgp->args.ctx->state)) {
7715 rpc_exit(task, NFS4_OK);
7719 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7721 struct nfs4_layoutget *lgp = calldata;
7722 struct inode *inode = lgp->args.inode;
7723 struct nfs_server *server = NFS_SERVER(inode);
7724 struct pnfs_layout_hdr *lo;
7725 struct nfs4_state *state = NULL;
7726 unsigned long timeo, now, giveup;
7728 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7730 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7733 switch (task->tk_status) {
7737 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7738 * (or clients) writing to the same RAID stripe
7740 case -NFS4ERR_LAYOUTTRYLATER:
7742 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7743 * existing layout before getting a new one).
7745 case -NFS4ERR_RECALLCONFLICT:
7746 timeo = rpc_get_timeout(task->tk_client);
7747 giveup = lgp->args.timestamp + timeo;
7749 if (time_after(giveup, now)) {
7750 unsigned long delay;
7753 * - Not less then NFS4_POLL_RETRY_MIN.
7754 * - One last time a jiffie before we give up
7755 * - exponential backoff (time_now minus start_attempt)
7757 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7758 min((giveup - now - 1),
7759 now - lgp->args.timestamp));
7761 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7763 rpc_delay(task, delay);
7764 task->tk_status = 0;
7765 rpc_restart_call_prepare(task);
7766 goto out; /* Do not call nfs4_async_handle_error() */
7769 case -NFS4ERR_EXPIRED:
7770 case -NFS4ERR_BAD_STATEID:
7771 spin_lock(&inode->i_lock);
7772 lo = NFS_I(inode)->layout;
7773 if (!lo || list_empty(&lo->plh_segs)) {
7774 spin_unlock(&inode->i_lock);
7775 /* If the open stateid was bad, then recover it. */
7776 state = lgp->args.ctx->state;
7781 * Mark the bad layout state as invalid, then retry
7782 * with the current stateid.
7784 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7785 spin_unlock(&inode->i_lock);
7786 pnfs_free_lseg_list(&head);
7788 task->tk_status = 0;
7789 rpc_restart_call_prepare(task);
7792 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
7793 rpc_restart_call_prepare(task);
7795 dprintk("<-- %s\n", __func__);
7798 static size_t max_response_pages(struct nfs_server *server)
7800 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7801 return nfs_page_array_len(0, max_resp_sz);
7804 static void nfs4_free_pages(struct page **pages, size_t size)
7811 for (i = 0; i < size; i++) {
7814 __free_page(pages[i]);
7819 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7821 struct page **pages;
7824 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7826 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7830 for (i = 0; i < size; i++) {
7831 pages[i] = alloc_page(gfp_flags);
7833 dprintk("%s: failed to allocate page\n", __func__);
7834 nfs4_free_pages(pages, size);
7842 static void nfs4_layoutget_release(void *calldata)
7844 struct nfs4_layoutget *lgp = calldata;
7845 struct inode *inode = lgp->args.inode;
7846 struct nfs_server *server = NFS_SERVER(inode);
7847 size_t max_pages = max_response_pages(server);
7849 dprintk("--> %s\n", __func__);
7850 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7851 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7852 put_nfs_open_context(lgp->args.ctx);
7854 dprintk("<-- %s\n", __func__);
7857 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7858 .rpc_call_prepare = nfs4_layoutget_prepare,
7859 .rpc_call_done = nfs4_layoutget_done,
7860 .rpc_release = nfs4_layoutget_release,
7863 struct pnfs_layout_segment *
7864 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7866 struct inode *inode = lgp->args.inode;
7867 struct nfs_server *server = NFS_SERVER(inode);
7868 size_t max_pages = max_response_pages(server);
7869 struct rpc_task *task;
7870 struct rpc_message msg = {
7871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7872 .rpc_argp = &lgp->args,
7873 .rpc_resp = &lgp->res,
7874 .rpc_cred = lgp->cred,
7876 struct rpc_task_setup task_setup_data = {
7877 .rpc_client = server->client,
7878 .rpc_message = &msg,
7879 .callback_ops = &nfs4_layoutget_call_ops,
7880 .callback_data = lgp,
7881 .flags = RPC_TASK_ASYNC,
7883 struct pnfs_layout_segment *lseg = NULL;
7886 dprintk("--> %s\n", __func__);
7888 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7889 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7891 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7892 if (!lgp->args.layout.pages) {
7893 nfs4_layoutget_release(lgp);
7894 return ERR_PTR(-ENOMEM);
7896 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7897 lgp->args.timestamp = jiffies;
7899 lgp->res.layoutp = &lgp->args.layout;
7900 lgp->res.seq_res.sr_slot = NULL;
7901 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7903 task = rpc_run_task(&task_setup_data);
7905 return ERR_CAST(task);
7906 status = nfs4_wait_for_completion_rpc_task(task);
7908 status = task->tk_status;
7909 trace_nfs4_layoutget(lgp->args.ctx,
7913 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7914 if (status == 0 && lgp->res.layoutp->len)
7915 lseg = pnfs_layout_process(lgp);
7917 dprintk("<-- %s status=%d\n", __func__, status);
7919 return ERR_PTR(status);
7924 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7926 struct nfs4_layoutreturn *lrp = calldata;
7928 dprintk("--> %s\n", __func__);
7929 nfs41_setup_sequence(lrp->clp->cl_session,
7930 &lrp->args.seq_args,
7935 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7937 struct nfs4_layoutreturn *lrp = calldata;
7938 struct nfs_server *server;
7940 dprintk("--> %s\n", __func__);
7942 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
7945 server = NFS_SERVER(lrp->args.inode);
7946 switch (task->tk_status) {
7948 task->tk_status = 0;
7951 case -NFS4ERR_DELAY:
7952 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
7954 rpc_restart_call_prepare(task);
7957 dprintk("<-- %s\n", __func__);
7960 static void nfs4_layoutreturn_release(void *calldata)
7962 struct nfs4_layoutreturn *lrp = calldata;
7963 struct pnfs_layout_hdr *lo = lrp->args.layout;
7965 dprintk("--> %s\n", __func__);
7966 spin_lock(&lo->plh_inode->i_lock);
7967 if (lrp->res.lrs_present)
7968 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7969 pnfs_clear_layoutreturn_waitbit(lo);
7970 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7971 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
7972 lo->plh_block_lgets--;
7973 spin_unlock(&lo->plh_inode->i_lock);
7974 pnfs_put_layout_hdr(lrp->args.layout);
7975 nfs_iput_and_deactive(lrp->inode);
7977 dprintk("<-- %s\n", __func__);
7980 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7981 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7982 .rpc_call_done = nfs4_layoutreturn_done,
7983 .rpc_release = nfs4_layoutreturn_release,
7986 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
7988 struct rpc_task *task;
7989 struct rpc_message msg = {
7990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7991 .rpc_argp = &lrp->args,
7992 .rpc_resp = &lrp->res,
7993 .rpc_cred = lrp->cred,
7995 struct rpc_task_setup task_setup_data = {
7996 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
7997 .rpc_message = &msg,
7998 .callback_ops = &nfs4_layoutreturn_call_ops,
7999 .callback_data = lrp,
8003 dprintk("--> %s\n", __func__);
8005 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8007 nfs4_layoutreturn_release(lrp);
8010 task_setup_data.flags |= RPC_TASK_ASYNC;
8012 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8013 task = rpc_run_task(&task_setup_data);
8015 return PTR_ERR(task);
8017 status = task->tk_status;
8018 trace_nfs4_layoutreturn(lrp->args.inode, status);
8019 dprintk("<-- %s status=%d\n", __func__, status);
8025 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8026 struct pnfs_device *pdev,
8027 struct rpc_cred *cred)
8029 struct nfs4_getdeviceinfo_args args = {
8031 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8032 NOTIFY_DEVICEID4_DELETE,
8034 struct nfs4_getdeviceinfo_res res = {
8037 struct rpc_message msg = {
8038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8045 dprintk("--> %s\n", __func__);
8046 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8047 if (res.notification & ~args.notify_types)
8048 dprintk("%s: unsupported notification\n", __func__);
8049 if (res.notification != args.notify_types)
8052 dprintk("<-- %s status=%d\n", __func__, status);
8057 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8058 struct pnfs_device *pdev,
8059 struct rpc_cred *cred)
8061 struct nfs4_exception exception = { };
8065 err = nfs4_handle_exception(server,
8066 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8068 } while (exception.retry);
8071 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8073 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8075 struct nfs4_layoutcommit_data *data = calldata;
8076 struct nfs_server *server = NFS_SERVER(data->args.inode);
8077 struct nfs4_session *session = nfs4_get_session(server);
8079 nfs41_setup_sequence(session,
8080 &data->args.seq_args,
8086 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8088 struct nfs4_layoutcommit_data *data = calldata;
8089 struct nfs_server *server = NFS_SERVER(data->args.inode);
8091 if (!nfs41_sequence_done(task, &data->res.seq_res))
8094 switch (task->tk_status) { /* Just ignore these failures */
8095 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8096 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8097 case -NFS4ERR_BADLAYOUT: /* no layout */
8098 case -NFS4ERR_GRACE: /* loca_recalim always false */
8099 task->tk_status = 0;
8103 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8104 rpc_restart_call_prepare(task);
8110 static void nfs4_layoutcommit_release(void *calldata)
8112 struct nfs4_layoutcommit_data *data = calldata;
8114 pnfs_cleanup_layoutcommit(data);
8115 nfs_post_op_update_inode_force_wcc(data->args.inode,
8117 put_rpccred(data->cred);
8118 nfs_iput_and_deactive(data->inode);
8122 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8123 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8124 .rpc_call_done = nfs4_layoutcommit_done,
8125 .rpc_release = nfs4_layoutcommit_release,
8129 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8131 struct rpc_message msg = {
8132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8133 .rpc_argp = &data->args,
8134 .rpc_resp = &data->res,
8135 .rpc_cred = data->cred,
8137 struct rpc_task_setup task_setup_data = {
8138 .task = &data->task,
8139 .rpc_client = NFS_CLIENT(data->args.inode),
8140 .rpc_message = &msg,
8141 .callback_ops = &nfs4_layoutcommit_ops,
8142 .callback_data = data,
8144 struct rpc_task *task;
8147 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8148 "lbw: %llu inode %lu\n",
8149 data->task.tk_pid, sync,
8150 data->args.lastbytewritten,
8151 data->args.inode->i_ino);
8154 data->inode = nfs_igrab_and_active(data->args.inode);
8155 if (data->inode == NULL) {
8156 nfs4_layoutcommit_release(data);
8159 task_setup_data.flags = RPC_TASK_ASYNC;
8161 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8162 task = rpc_run_task(&task_setup_data);
8164 return PTR_ERR(task);
8166 status = task->tk_status;
8167 trace_nfs4_layoutcommit(data->args.inode, status);
8168 dprintk("%s: status %d\n", __func__, status);
8174 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8175 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8178 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8179 struct nfs_fsinfo *info,
8180 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8182 struct nfs41_secinfo_no_name_args args = {
8183 .style = SECINFO_STYLE_CURRENT_FH,
8185 struct nfs4_secinfo_res res = {
8188 struct rpc_message msg = {
8189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8193 struct rpc_clnt *clnt = server->client;
8194 struct rpc_cred *cred = NULL;
8197 if (use_integrity) {
8198 clnt = server->nfs_client->cl_rpcclient;
8199 cred = nfs4_get_clid_cred(server->nfs_client);
8200 msg.rpc_cred = cred;
8203 dprintk("--> %s\n", __func__);
8204 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8206 dprintk("<-- %s status=%d\n", __func__, status);
8215 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8216 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8218 struct nfs4_exception exception = { };
8221 /* first try using integrity protection */
8222 err = -NFS4ERR_WRONGSEC;
8224 /* try to use integrity protection with machine cred */
8225 if (_nfs4_is_integrity_protected(server->nfs_client))
8226 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8230 * if unable to use integrity protection, or SECINFO with
8231 * integrity protection returns NFS4ERR_WRONGSEC (which is
8232 * disallowed by spec, but exists in deployed servers) use
8233 * the current filesystem's rpc_client and the user cred.
8235 if (err == -NFS4ERR_WRONGSEC)
8236 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8241 case -NFS4ERR_WRONGSEC:
8245 err = nfs4_handle_exception(server, err, &exception);
8247 } while (exception.retry);
8253 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8254 struct nfs_fsinfo *info)
8258 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8259 struct nfs4_secinfo_flavors *flavors;
8260 struct nfs4_secinfo4 *secinfo;
8263 page = alloc_page(GFP_KERNEL);
8269 flavors = page_address(page);
8270 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8273 * Fall back on "guess and check" method if
8274 * the server doesn't support SECINFO_NO_NAME
8276 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8277 err = nfs4_find_root_sec(server, fhandle, info);
8283 for (i = 0; i < flavors->num_flavors; i++) {
8284 secinfo = &flavors->flavors[i];
8286 switch (secinfo->flavor) {
8290 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8291 &secinfo->flavor_info);
8294 flavor = RPC_AUTH_MAXFLAVOR;
8298 if (!nfs_auth_info_match(&server->auth_info, flavor))
8299 flavor = RPC_AUTH_MAXFLAVOR;
8301 if (flavor != RPC_AUTH_MAXFLAVOR) {
8302 err = nfs4_lookup_root_sec(server, fhandle,
8309 if (flavor == RPC_AUTH_MAXFLAVOR)
8320 static int _nfs41_test_stateid(struct nfs_server *server,
8321 nfs4_stateid *stateid,
8322 struct rpc_cred *cred)
8325 struct nfs41_test_stateid_args args = {
8328 struct nfs41_test_stateid_res res;
8329 struct rpc_message msg = {
8330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8335 struct rpc_clnt *rpc_client = server->client;
8337 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8340 dprintk("NFS call test_stateid %p\n", stateid);
8341 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8342 nfs4_set_sequence_privileged(&args.seq_args);
8343 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8344 &args.seq_args, &res.seq_res);
8345 if (status != NFS_OK) {
8346 dprintk("NFS reply test_stateid: failed, %d\n", status);
8349 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8354 * nfs41_test_stateid - perform a TEST_STATEID operation
8356 * @server: server / transport on which to perform the operation
8357 * @stateid: state ID to test
8360 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8361 * Otherwise a negative NFS4ERR value is returned if the operation
8362 * failed or the state ID is not currently valid.
8364 static int nfs41_test_stateid(struct nfs_server *server,
8365 nfs4_stateid *stateid,
8366 struct rpc_cred *cred)
8368 struct nfs4_exception exception = { };
8371 err = _nfs41_test_stateid(server, stateid, cred);
8372 if (err != -NFS4ERR_DELAY)
8374 nfs4_handle_exception(server, err, &exception);
8375 } while (exception.retry);
8379 struct nfs_free_stateid_data {
8380 struct nfs_server *server;
8381 struct nfs41_free_stateid_args args;
8382 struct nfs41_free_stateid_res res;
8385 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8387 struct nfs_free_stateid_data *data = calldata;
8388 nfs41_setup_sequence(nfs4_get_session(data->server),
8389 &data->args.seq_args,
8394 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8396 struct nfs_free_stateid_data *data = calldata;
8398 nfs41_sequence_done(task, &data->res.seq_res);
8400 switch (task->tk_status) {
8401 case -NFS4ERR_DELAY:
8402 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8403 rpc_restart_call_prepare(task);
8407 static void nfs41_free_stateid_release(void *calldata)
8412 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8413 .rpc_call_prepare = nfs41_free_stateid_prepare,
8414 .rpc_call_done = nfs41_free_stateid_done,
8415 .rpc_release = nfs41_free_stateid_release,
8418 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8419 nfs4_stateid *stateid,
8420 struct rpc_cred *cred,
8423 struct rpc_message msg = {
8424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8427 struct rpc_task_setup task_setup = {
8428 .rpc_client = server->client,
8429 .rpc_message = &msg,
8430 .callback_ops = &nfs41_free_stateid_ops,
8431 .flags = RPC_TASK_ASYNC,
8433 struct nfs_free_stateid_data *data;
8435 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8436 &task_setup.rpc_client, &msg);
8438 dprintk("NFS call free_stateid %p\n", stateid);
8439 data = kmalloc(sizeof(*data), GFP_NOFS);
8441 return ERR_PTR(-ENOMEM);
8442 data->server = server;
8443 nfs4_stateid_copy(&data->args.stateid, stateid);
8445 task_setup.callback_data = data;
8447 msg.rpc_argp = &data->args;
8448 msg.rpc_resp = &data->res;
8449 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8451 nfs4_set_sequence_privileged(&data->args.seq_args);
8453 return rpc_run_task(&task_setup);
8457 * nfs41_free_stateid - perform a FREE_STATEID operation
8459 * @server: server / transport on which to perform the operation
8460 * @stateid: state ID to release
8463 * Returns NFS_OK if the server freed "stateid". Otherwise a
8464 * negative NFS4ERR value is returned.
8466 static int nfs41_free_stateid(struct nfs_server *server,
8467 nfs4_stateid *stateid,
8468 struct rpc_cred *cred)
8470 struct rpc_task *task;
8473 task = _nfs41_free_stateid(server, stateid, cred, true);
8475 return PTR_ERR(task);
8476 ret = rpc_wait_for_completion_task(task);
8478 ret = task->tk_status;
8484 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8486 struct rpc_task *task;
8487 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8489 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8490 nfs4_free_lock_state(server, lsp);
8496 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8497 const nfs4_stateid *s2)
8499 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8502 if (s1->seqid == s2->seqid)
8504 if (s1->seqid == 0 || s2->seqid == 0)
8510 #endif /* CONFIG_NFS_V4_1 */
8512 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8513 const nfs4_stateid *s2)
8515 return nfs4_stateid_match(s1, s2);
8519 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8520 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8521 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8522 .recover_open = nfs4_open_reclaim,
8523 .recover_lock = nfs4_lock_reclaim,
8524 .establish_clid = nfs4_init_clientid,
8525 .detect_trunking = nfs40_discover_server_trunking,
8528 #if defined(CONFIG_NFS_V4_1)
8529 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8530 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8531 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8532 .recover_open = nfs4_open_reclaim,
8533 .recover_lock = nfs4_lock_reclaim,
8534 .establish_clid = nfs41_init_clientid,
8535 .reclaim_complete = nfs41_proc_reclaim_complete,
8536 .detect_trunking = nfs41_discover_server_trunking,
8538 #endif /* CONFIG_NFS_V4_1 */
8540 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8541 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8542 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8543 .recover_open = nfs40_open_expired,
8544 .recover_lock = nfs4_lock_expired,
8545 .establish_clid = nfs4_init_clientid,
8548 #if defined(CONFIG_NFS_V4_1)
8549 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8550 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8551 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8552 .recover_open = nfs41_open_expired,
8553 .recover_lock = nfs41_lock_expired,
8554 .establish_clid = nfs41_init_clientid,
8556 #endif /* CONFIG_NFS_V4_1 */
8558 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8559 .sched_state_renewal = nfs4_proc_async_renew,
8560 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8561 .renew_lease = nfs4_proc_renew,
8564 #if defined(CONFIG_NFS_V4_1)
8565 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8566 .sched_state_renewal = nfs41_proc_async_sequence,
8567 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8568 .renew_lease = nfs4_proc_sequence,
8572 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8573 .get_locations = _nfs40_proc_get_locations,
8574 .fsid_present = _nfs40_proc_fsid_present,
8577 #if defined(CONFIG_NFS_V4_1)
8578 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8579 .get_locations = _nfs41_proc_get_locations,
8580 .fsid_present = _nfs41_proc_fsid_present,
8582 #endif /* CONFIG_NFS_V4_1 */
8584 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8586 .init_caps = NFS_CAP_READDIRPLUS
8587 | NFS_CAP_ATOMIC_OPEN
8588 | NFS_CAP_CHANGE_ATTR
8589 | NFS_CAP_POSIX_LOCK,
8590 .init_client = nfs40_init_client,
8591 .shutdown_client = nfs40_shutdown_client,
8592 .match_stateid = nfs4_match_stateid,
8593 .find_root_sec = nfs4_find_root_sec,
8594 .free_lock_state = nfs4_release_lockowner,
8595 .alloc_seqid = nfs_alloc_seqid,
8596 .call_sync_ops = &nfs40_call_sync_ops,
8597 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8598 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8599 .state_renewal_ops = &nfs40_state_renewal_ops,
8600 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8603 #if defined(CONFIG_NFS_V4_1)
8604 static struct nfs_seqid *
8605 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8610 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8612 .init_caps = NFS_CAP_READDIRPLUS
8613 | NFS_CAP_ATOMIC_OPEN
8614 | NFS_CAP_CHANGE_ATTR
8615 | NFS_CAP_POSIX_LOCK
8616 | NFS_CAP_STATEID_NFSV41
8617 | NFS_CAP_ATOMIC_OPEN_V1,
8618 .init_client = nfs41_init_client,
8619 .shutdown_client = nfs41_shutdown_client,
8620 .match_stateid = nfs41_match_stateid,
8621 .find_root_sec = nfs41_find_root_sec,
8622 .free_lock_state = nfs41_free_lock_state,
8623 .alloc_seqid = nfs_alloc_no_seqid,
8624 .call_sync_ops = &nfs41_call_sync_ops,
8625 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8626 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8627 .state_renewal_ops = &nfs41_state_renewal_ops,
8628 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8632 #if defined(CONFIG_NFS_V4_2)
8633 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8635 .init_caps = NFS_CAP_READDIRPLUS
8636 | NFS_CAP_ATOMIC_OPEN
8637 | NFS_CAP_CHANGE_ATTR
8638 | NFS_CAP_POSIX_LOCK
8639 | NFS_CAP_STATEID_NFSV41
8640 | NFS_CAP_ATOMIC_OPEN_V1
8642 | NFS_CAP_DEALLOCATE
8644 .init_client = nfs41_init_client,
8645 .shutdown_client = nfs41_shutdown_client,
8646 .match_stateid = nfs41_match_stateid,
8647 .find_root_sec = nfs41_find_root_sec,
8648 .free_lock_state = nfs41_free_lock_state,
8649 .call_sync_ops = &nfs41_call_sync_ops,
8650 .alloc_seqid = nfs_alloc_no_seqid,
8651 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8652 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8653 .state_renewal_ops = &nfs41_state_renewal_ops,
8657 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8658 [0] = &nfs_v4_0_minor_ops,
8659 #if defined(CONFIG_NFS_V4_1)
8660 [1] = &nfs_v4_1_minor_ops,
8662 #if defined(CONFIG_NFS_V4_2)
8663 [2] = &nfs_v4_2_minor_ops,
8667 static const struct inode_operations nfs4_dir_inode_operations = {
8668 .create = nfs_create,
8669 .lookup = nfs_lookup,
8670 .atomic_open = nfs_atomic_open,
8672 .unlink = nfs_unlink,
8673 .symlink = nfs_symlink,
8677 .rename = nfs_rename,
8678 .permission = nfs_permission,
8679 .getattr = nfs_getattr,
8680 .setattr = nfs_setattr,
8681 .getxattr = generic_getxattr,
8682 .setxattr = generic_setxattr,
8683 .listxattr = generic_listxattr,
8684 .removexattr = generic_removexattr,
8687 static const struct inode_operations nfs4_file_inode_operations = {
8688 .permission = nfs_permission,
8689 .getattr = nfs_getattr,
8690 .setattr = nfs_setattr,
8691 .getxattr = generic_getxattr,
8692 .setxattr = generic_setxattr,
8693 .listxattr = generic_listxattr,
8694 .removexattr = generic_removexattr,
8697 const struct nfs_rpc_ops nfs_v4_clientops = {
8698 .version = 4, /* protocol version */
8699 .dentry_ops = &nfs4_dentry_operations,
8700 .dir_inode_ops = &nfs4_dir_inode_operations,
8701 .file_inode_ops = &nfs4_file_inode_operations,
8702 .file_ops = &nfs4_file_operations,
8703 .getroot = nfs4_proc_get_root,
8704 .submount = nfs4_submount,
8705 .try_mount = nfs4_try_mount,
8706 .getattr = nfs4_proc_getattr,
8707 .setattr = nfs4_proc_setattr,
8708 .lookup = nfs4_proc_lookup,
8709 .access = nfs4_proc_access,
8710 .readlink = nfs4_proc_readlink,
8711 .create = nfs4_proc_create,
8712 .remove = nfs4_proc_remove,
8713 .unlink_setup = nfs4_proc_unlink_setup,
8714 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8715 .unlink_done = nfs4_proc_unlink_done,
8716 .rename_setup = nfs4_proc_rename_setup,
8717 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8718 .rename_done = nfs4_proc_rename_done,
8719 .link = nfs4_proc_link,
8720 .symlink = nfs4_proc_symlink,
8721 .mkdir = nfs4_proc_mkdir,
8722 .rmdir = nfs4_proc_remove,
8723 .readdir = nfs4_proc_readdir,
8724 .mknod = nfs4_proc_mknod,
8725 .statfs = nfs4_proc_statfs,
8726 .fsinfo = nfs4_proc_fsinfo,
8727 .pathconf = nfs4_proc_pathconf,
8728 .set_capabilities = nfs4_server_capabilities,
8729 .decode_dirent = nfs4_decode_dirent,
8730 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8731 .read_setup = nfs4_proc_read_setup,
8732 .read_done = nfs4_read_done,
8733 .write_setup = nfs4_proc_write_setup,
8734 .write_done = nfs4_write_done,
8735 .commit_setup = nfs4_proc_commit_setup,
8736 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8737 .commit_done = nfs4_commit_done,
8738 .lock = nfs4_proc_lock,
8739 .clear_acl_cache = nfs4_zap_acl_attr,
8740 .close_context = nfs4_close_context,
8741 .open_context = nfs4_atomic_open,
8742 .have_delegation = nfs4_have_delegation,
8743 .return_delegation = nfs4_inode_return_delegation,
8744 .alloc_client = nfs4_alloc_client,
8745 .init_client = nfs4_init_client,
8746 .free_client = nfs4_free_client,
8747 .create_server = nfs4_create_server,
8748 .clone_server = nfs_clone_server,
8751 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8752 .prefix = XATTR_NAME_NFSV4_ACL,
8753 .list = nfs4_xattr_list_nfs4_acl,
8754 .get = nfs4_xattr_get_nfs4_acl,
8755 .set = nfs4_xattr_set_nfs4_acl,
8758 const struct xattr_handler *nfs4_xattr_handlers[] = {
8759 &nfs4_xattr_nfs4_acl_handler,
8760 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8761 &nfs4_xattr_nfs4_label_handler,