1 #include <linux/ceph/ceph_debug.h>
4 #include <linux/wait.h>
5 #include <linux/slab.h>
7 #include <linux/sched.h>
8 #include <linux/debugfs.h>
9 #include <linux/seq_file.h>
10 #include <linux/utsname.h>
13 #include "mds_client.h"
15 #include <linux/ceph/ceph_features.h>
16 #include <linux/ceph/messenger.h>
17 #include <linux/ceph/decode.h>
18 #include <linux/ceph/pagelist.h>
19 #include <linux/ceph/auth.h>
20 #include <linux/ceph/debugfs.h>
23 * A cluster of MDS (metadata server) daemons is responsible for
24 * managing the file system namespace (the directory hierarchy and
25 * inodes) and for coordinating shared access to storage. Metadata is
26 * partitioning hierarchically across a number of servers, and that
27 * partition varies over time as the cluster adjusts the distribution
28 * in order to balance load.
30 * The MDS client is primarily responsible to managing synchronous
31 * metadata requests for operations like open, unlink, and so forth.
32 * If there is a MDS failure, we find out about it when we (possibly
33 * request and) receive a new MDS map, and can resubmit affected
36 * For the most part, though, we take advantage of a lossless
37 * communications channel to the MDS, and do not need to worry about
38 * timing out or resubmitting requests.
40 * We maintain a stateful "session" with each MDS we interact with.
41 * Within each session, we sent periodic heartbeat messages to ensure
42 * any capabilities or leases we have been issues remain valid. If
43 * the session times out and goes stale, our leases and capabilities
44 * are no longer valid.
47 struct ceph_reconnect_state
{
49 struct ceph_pagelist
*pagelist
;
53 static void __wake_requests(struct ceph_mds_client
*mdsc
,
54 struct list_head
*head
);
56 static const struct ceph_connection_operations mds_con_ops
;
64 * parse individual inode info
66 static int parse_reply_info_in(void **p
, void *end
,
67 struct ceph_mds_reply_info_in
*info
,
73 *p
+= sizeof(struct ceph_mds_reply_inode
) +
74 sizeof(*info
->in
->fragtree
.splits
) *
75 le32_to_cpu(info
->in
->fragtree
.nsplits
);
77 ceph_decode_32_safe(p
, end
, info
->symlink_len
, bad
);
78 ceph_decode_need(p
, end
, info
->symlink_len
, bad
);
80 *p
+= info
->symlink_len
;
82 if (features
& CEPH_FEATURE_DIRLAYOUTHASH
)
83 ceph_decode_copy_safe(p
, end
, &info
->dir_layout
,
84 sizeof(info
->dir_layout
), bad
);
86 memset(&info
->dir_layout
, 0, sizeof(info
->dir_layout
));
88 ceph_decode_32_safe(p
, end
, info
->xattr_len
, bad
);
89 ceph_decode_need(p
, end
, info
->xattr_len
, bad
);
90 info
->xattr_data
= *p
;
91 *p
+= info
->xattr_len
;
93 if (features
& CEPH_FEATURE_MDS_INLINE_DATA
) {
94 ceph_decode_64_safe(p
, end
, info
->inline_version
, bad
);
95 ceph_decode_32_safe(p
, end
, info
->inline_len
, bad
);
96 ceph_decode_need(p
, end
, info
->inline_len
, bad
);
97 info
->inline_data
= *p
;
98 *p
+= info
->inline_len
;
100 info
->inline_version
= CEPH_INLINE_NONE
;
108 * parse a normal reply, which may contain a (dir+)dentry and/or a
111 static int parse_reply_info_trace(void **p
, void *end
,
112 struct ceph_mds_reply_info_parsed
*info
,
117 if (info
->head
->is_dentry
) {
118 err
= parse_reply_info_in(p
, end
, &info
->diri
, features
);
122 if (unlikely(*p
+ sizeof(*info
->dirfrag
) > end
))
125 *p
+= sizeof(*info
->dirfrag
) +
126 sizeof(u32
)*le32_to_cpu(info
->dirfrag
->ndist
);
127 if (unlikely(*p
> end
))
130 ceph_decode_32_safe(p
, end
, info
->dname_len
, bad
);
131 ceph_decode_need(p
, end
, info
->dname_len
, bad
);
133 *p
+= info
->dname_len
;
135 *p
+= sizeof(*info
->dlease
);
138 if (info
->head
->is_target
) {
139 err
= parse_reply_info_in(p
, end
, &info
->targeti
, features
);
144 if (unlikely(*p
!= end
))
151 pr_err("problem parsing mds trace %d\n", err
);
156 * parse readdir results
158 static int parse_reply_info_dir(void **p
, void *end
,
159 struct ceph_mds_reply_info_parsed
*info
,
166 if (*p
+ sizeof(*info
->dir_dir
) > end
)
168 *p
+= sizeof(*info
->dir_dir
) +
169 sizeof(u32
)*le32_to_cpu(info
->dir_dir
->ndist
);
173 ceph_decode_need(p
, end
, sizeof(num
) + 2, bad
);
174 num
= ceph_decode_32(p
);
175 info
->dir_end
= ceph_decode_8(p
);
176 info
->dir_complete
= ceph_decode_8(p
);
180 BUG_ON(!info
->dir_in
);
181 info
->dir_dname
= (void *)(info
->dir_in
+ num
);
182 info
->dir_dname_len
= (void *)(info
->dir_dname
+ num
);
183 info
->dir_dlease
= (void *)(info
->dir_dname_len
+ num
);
184 if ((unsigned long)(info
->dir_dlease
+ num
) >
185 (unsigned long)info
->dir_in
+ info
->dir_buf_size
) {
186 pr_err("dir contents are larger than expected\n");
194 ceph_decode_need(p
, end
, sizeof(u32
)*2, bad
);
195 info
->dir_dname_len
[i
] = ceph_decode_32(p
);
196 ceph_decode_need(p
, end
, info
->dir_dname_len
[i
], bad
);
197 info
->dir_dname
[i
] = *p
;
198 *p
+= info
->dir_dname_len
[i
];
199 dout("parsed dir dname '%.*s'\n", info
->dir_dname_len
[i
],
201 info
->dir_dlease
[i
] = *p
;
202 *p
+= sizeof(struct ceph_mds_reply_lease
);
205 err
= parse_reply_info_in(p
, end
, &info
->dir_in
[i
], features
);
220 pr_err("problem parsing dir contents %d\n", err
);
225 * parse fcntl F_GETLK results
227 static int parse_reply_info_filelock(void **p
, void *end
,
228 struct ceph_mds_reply_info_parsed
*info
,
231 if (*p
+ sizeof(*info
->filelock_reply
) > end
)
234 info
->filelock_reply
= *p
;
235 *p
+= sizeof(*info
->filelock_reply
);
237 if (unlikely(*p
!= end
))
246 * parse create results
248 static int parse_reply_info_create(void **p
, void *end
,
249 struct ceph_mds_reply_info_parsed
*info
,
252 if (features
& CEPH_FEATURE_REPLY_CREATE_INODE
) {
254 info
->has_create_ino
= false;
256 info
->has_create_ino
= true;
257 info
->ino
= ceph_decode_64(p
);
261 if (unlikely(*p
!= end
))
270 * parse extra results
272 static int parse_reply_info_extra(void **p
, void *end
,
273 struct ceph_mds_reply_info_parsed
*info
,
276 if (info
->head
->op
== CEPH_MDS_OP_GETFILELOCK
)
277 return parse_reply_info_filelock(p
, end
, info
, features
);
278 else if (info
->head
->op
== CEPH_MDS_OP_READDIR
||
279 info
->head
->op
== CEPH_MDS_OP_LSSNAP
)
280 return parse_reply_info_dir(p
, end
, info
, features
);
281 else if (info
->head
->op
== CEPH_MDS_OP_CREATE
)
282 return parse_reply_info_create(p
, end
, info
, features
);
288 * parse entire mds reply
290 static int parse_reply_info(struct ceph_msg
*msg
,
291 struct ceph_mds_reply_info_parsed
*info
,
298 info
->head
= msg
->front
.iov_base
;
299 p
= msg
->front
.iov_base
+ sizeof(struct ceph_mds_reply_head
);
300 end
= p
+ msg
->front
.iov_len
- sizeof(struct ceph_mds_reply_head
);
303 ceph_decode_32_safe(&p
, end
, len
, bad
);
305 ceph_decode_need(&p
, end
, len
, bad
);
306 err
= parse_reply_info_trace(&p
, p
+len
, info
, features
);
312 ceph_decode_32_safe(&p
, end
, len
, bad
);
314 ceph_decode_need(&p
, end
, len
, bad
);
315 err
= parse_reply_info_extra(&p
, p
+len
, info
, features
);
321 ceph_decode_32_safe(&p
, end
, len
, bad
);
322 info
->snapblob_len
= len
;
333 pr_err("mds parse_reply err %d\n", err
);
337 static void destroy_reply_info(struct ceph_mds_reply_info_parsed
*info
)
341 free_pages((unsigned long)info
->dir_in
, get_order(info
->dir_buf_size
));
348 const char *ceph_session_state_name(int s
)
351 case CEPH_MDS_SESSION_NEW
: return "new";
352 case CEPH_MDS_SESSION_OPENING
: return "opening";
353 case CEPH_MDS_SESSION_OPEN
: return "open";
354 case CEPH_MDS_SESSION_HUNG
: return "hung";
355 case CEPH_MDS_SESSION_CLOSING
: return "closing";
356 case CEPH_MDS_SESSION_RESTARTING
: return "restarting";
357 case CEPH_MDS_SESSION_RECONNECTING
: return "reconnecting";
358 default: return "???";
362 static struct ceph_mds_session
*get_session(struct ceph_mds_session
*s
)
364 if (atomic_inc_not_zero(&s
->s_ref
)) {
365 dout("mdsc get_session %p %d -> %d\n", s
,
366 atomic_read(&s
->s_ref
)-1, atomic_read(&s
->s_ref
));
369 dout("mdsc get_session %p 0 -- FAIL", s
);
374 void ceph_put_mds_session(struct ceph_mds_session
*s
)
376 dout("mdsc put_session %p %d -> %d\n", s
,
377 atomic_read(&s
->s_ref
), atomic_read(&s
->s_ref
)-1);
378 if (atomic_dec_and_test(&s
->s_ref
)) {
379 if (s
->s_auth
.authorizer
)
380 ceph_auth_destroy_authorizer(
381 s
->s_mdsc
->fsc
->client
->monc
.auth
,
382 s
->s_auth
.authorizer
);
388 * called under mdsc->mutex
390 struct ceph_mds_session
*__ceph_lookup_mds_session(struct ceph_mds_client
*mdsc
,
393 struct ceph_mds_session
*session
;
395 if (mds
>= mdsc
->max_sessions
|| mdsc
->sessions
[mds
] == NULL
)
397 session
= mdsc
->sessions
[mds
];
398 dout("lookup_mds_session %p %d\n", session
,
399 atomic_read(&session
->s_ref
));
400 get_session(session
);
404 static bool __have_session(struct ceph_mds_client
*mdsc
, int mds
)
406 if (mds
>= mdsc
->max_sessions
)
408 return mdsc
->sessions
[mds
];
411 static int __verify_registered_session(struct ceph_mds_client
*mdsc
,
412 struct ceph_mds_session
*s
)
414 if (s
->s_mds
>= mdsc
->max_sessions
||
415 mdsc
->sessions
[s
->s_mds
] != s
)
421 * create+register a new session for given mds.
422 * called under mdsc->mutex.
424 static struct ceph_mds_session
*register_session(struct ceph_mds_client
*mdsc
,
427 struct ceph_mds_session
*s
;
429 if (mds
>= mdsc
->mdsmap
->m_max_mds
)
430 return ERR_PTR(-EINVAL
);
432 s
= kzalloc(sizeof(*s
), GFP_NOFS
);
434 return ERR_PTR(-ENOMEM
);
437 s
->s_state
= CEPH_MDS_SESSION_NEW
;
440 mutex_init(&s
->s_mutex
);
442 ceph_con_init(&s
->s_con
, s
, &mds_con_ops
, &mdsc
->fsc
->client
->msgr
);
444 spin_lock_init(&s
->s_gen_ttl_lock
);
446 s
->s_cap_ttl
= jiffies
- 1;
448 spin_lock_init(&s
->s_cap_lock
);
449 s
->s_renew_requested
= 0;
451 INIT_LIST_HEAD(&s
->s_caps
);
454 atomic_set(&s
->s_ref
, 1);
455 INIT_LIST_HEAD(&s
->s_waiting
);
456 INIT_LIST_HEAD(&s
->s_unsafe
);
457 s
->s_num_cap_releases
= 0;
458 s
->s_cap_reconnect
= 0;
459 s
->s_cap_iterator
= NULL
;
460 INIT_LIST_HEAD(&s
->s_cap_releases
);
461 INIT_LIST_HEAD(&s
->s_cap_releases_done
);
462 INIT_LIST_HEAD(&s
->s_cap_flushing
);
463 INIT_LIST_HEAD(&s
->s_cap_snaps_flushing
);
465 dout("register_session mds%d\n", mds
);
466 if (mds
>= mdsc
->max_sessions
) {
467 int newmax
= 1 << get_count_order(mds
+1);
468 struct ceph_mds_session
**sa
;
470 dout("register_session realloc to %d\n", newmax
);
471 sa
= kcalloc(newmax
, sizeof(void *), GFP_NOFS
);
474 if (mdsc
->sessions
) {
475 memcpy(sa
, mdsc
->sessions
,
476 mdsc
->max_sessions
* sizeof(void *));
477 kfree(mdsc
->sessions
);
480 mdsc
->max_sessions
= newmax
;
482 mdsc
->sessions
[mds
] = s
;
483 atomic_inc(&mdsc
->num_sessions
);
484 atomic_inc(&s
->s_ref
); /* one ref to sessions[], one to caller */
486 ceph_con_open(&s
->s_con
, CEPH_ENTITY_TYPE_MDS
, mds
,
487 ceph_mdsmap_get_addr(mdsc
->mdsmap
, mds
));
493 return ERR_PTR(-ENOMEM
);
497 * called under mdsc->mutex
499 static void __unregister_session(struct ceph_mds_client
*mdsc
,
500 struct ceph_mds_session
*s
)
502 dout("__unregister_session mds%d %p\n", s
->s_mds
, s
);
503 BUG_ON(mdsc
->sessions
[s
->s_mds
] != s
);
504 mdsc
->sessions
[s
->s_mds
] = NULL
;
505 ceph_con_close(&s
->s_con
);
506 ceph_put_mds_session(s
);
507 atomic_dec(&mdsc
->num_sessions
);
511 * drop session refs in request.
513 * should be last request ref, or hold mdsc->mutex
515 static void put_request_session(struct ceph_mds_request
*req
)
517 if (req
->r_session
) {
518 ceph_put_mds_session(req
->r_session
);
519 req
->r_session
= NULL
;
523 void ceph_mdsc_release_request(struct kref
*kref
)
525 struct ceph_mds_request
*req
= container_of(kref
,
526 struct ceph_mds_request
,
528 destroy_reply_info(&req
->r_reply_info
);
530 ceph_msg_put(req
->r_request
);
532 ceph_msg_put(req
->r_reply
);
534 ceph_put_cap_refs(ceph_inode(req
->r_inode
), CEPH_CAP_PIN
);
537 if (req
->r_locked_dir
)
538 ceph_put_cap_refs(ceph_inode(req
->r_locked_dir
), CEPH_CAP_PIN
);
539 iput(req
->r_target_inode
);
542 if (req
->r_old_dentry
)
543 dput(req
->r_old_dentry
);
544 if (req
->r_old_dentry_dir
) {
546 * track (and drop pins for) r_old_dentry_dir
547 * separately, since r_old_dentry's d_parent may have
548 * changed between the dir mutex being dropped and
549 * this request being freed.
551 ceph_put_cap_refs(ceph_inode(req
->r_old_dentry_dir
),
553 iput(req
->r_old_dentry_dir
);
558 ceph_pagelist_release(req
->r_pagelist
);
559 put_request_session(req
);
560 ceph_unreserve_caps(req
->r_mdsc
, &req
->r_caps_reservation
);
565 * lookup session, bump ref if found.
567 * called under mdsc->mutex.
569 static struct ceph_mds_request
*__lookup_request(struct ceph_mds_client
*mdsc
,
572 struct ceph_mds_request
*req
;
573 struct rb_node
*n
= mdsc
->request_tree
.rb_node
;
576 req
= rb_entry(n
, struct ceph_mds_request
, r_node
);
577 if (tid
< req
->r_tid
)
579 else if (tid
> req
->r_tid
)
582 ceph_mdsc_get_request(req
);
589 static void __insert_request(struct ceph_mds_client
*mdsc
,
590 struct ceph_mds_request
*new)
592 struct rb_node
**p
= &mdsc
->request_tree
.rb_node
;
593 struct rb_node
*parent
= NULL
;
594 struct ceph_mds_request
*req
= NULL
;
598 req
= rb_entry(parent
, struct ceph_mds_request
, r_node
);
599 if (new->r_tid
< req
->r_tid
)
601 else if (new->r_tid
> req
->r_tid
)
607 rb_link_node(&new->r_node
, parent
, p
);
608 rb_insert_color(&new->r_node
, &mdsc
->request_tree
);
612 * Register an in-flight request, and assign a tid. Link to directory
613 * are modifying (if any).
615 * Called under mdsc->mutex.
617 static void __register_request(struct ceph_mds_client
*mdsc
,
618 struct ceph_mds_request
*req
,
621 req
->r_tid
= ++mdsc
->last_tid
;
623 ceph_reserve_caps(mdsc
, &req
->r_caps_reservation
,
625 dout("__register_request %p tid %lld\n", req
, req
->r_tid
);
626 ceph_mdsc_get_request(req
);
627 __insert_request(mdsc
, req
);
629 req
->r_uid
= current_fsuid();
630 req
->r_gid
= current_fsgid();
633 struct ceph_inode_info
*ci
= ceph_inode(dir
);
636 spin_lock(&ci
->i_unsafe_lock
);
637 req
->r_unsafe_dir
= dir
;
638 list_add_tail(&req
->r_unsafe_dir_item
, &ci
->i_unsafe_dirops
);
639 spin_unlock(&ci
->i_unsafe_lock
);
643 static void __unregister_request(struct ceph_mds_client
*mdsc
,
644 struct ceph_mds_request
*req
)
646 dout("__unregister_request %p tid %lld\n", req
, req
->r_tid
);
647 rb_erase(&req
->r_node
, &mdsc
->request_tree
);
648 RB_CLEAR_NODE(&req
->r_node
);
650 if (req
->r_unsafe_dir
) {
651 struct ceph_inode_info
*ci
= ceph_inode(req
->r_unsafe_dir
);
653 spin_lock(&ci
->i_unsafe_lock
);
654 list_del_init(&req
->r_unsafe_dir_item
);
655 spin_unlock(&ci
->i_unsafe_lock
);
657 iput(req
->r_unsafe_dir
);
658 req
->r_unsafe_dir
= NULL
;
661 complete_all(&req
->r_safe_completion
);
663 ceph_mdsc_put_request(req
);
667 * Choose mds to send request to next. If there is a hint set in the
668 * request (e.g., due to a prior forward hint from the mds), use that.
669 * Otherwise, consult frag tree and/or caps to identify the
670 * appropriate mds. If all else fails, choose randomly.
672 * Called under mdsc->mutex.
674 static struct dentry
*get_nonsnap_parent(struct dentry
*dentry
)
677 * we don't need to worry about protecting the d_parent access
678 * here because we never renaming inside the snapped namespace
679 * except to resplice to another snapdir, and either the old or new
680 * result is a valid result.
682 while (!IS_ROOT(dentry
) && ceph_snap(dentry
->d_inode
) != CEPH_NOSNAP
)
683 dentry
= dentry
->d_parent
;
687 static int __choose_mds(struct ceph_mds_client
*mdsc
,
688 struct ceph_mds_request
*req
)
691 struct ceph_inode_info
*ci
;
692 struct ceph_cap
*cap
;
693 int mode
= req
->r_direct_mode
;
695 u32 hash
= req
->r_direct_hash
;
696 bool is_hash
= req
->r_direct_is_hash
;
699 * is there a specific mds we should try? ignore hint if we have
700 * no session and the mds is not up (active or recovering).
702 if (req
->r_resend_mds
>= 0 &&
703 (__have_session(mdsc
, req
->r_resend_mds
) ||
704 ceph_mdsmap_get_state(mdsc
->mdsmap
, req
->r_resend_mds
) > 0)) {
705 dout("choose_mds using resend_mds mds%d\n",
707 return req
->r_resend_mds
;
710 if (mode
== USE_RANDOM_MDS
)
715 inode
= req
->r_inode
;
716 } else if (req
->r_dentry
) {
717 /* ignore race with rename; old or new d_parent is okay */
718 struct dentry
*parent
= req
->r_dentry
->d_parent
;
719 struct inode
*dir
= parent
->d_inode
;
721 if (dir
->i_sb
!= mdsc
->fsc
->sb
) {
723 inode
= req
->r_dentry
->d_inode
;
724 } else if (ceph_snap(dir
) != CEPH_NOSNAP
) {
725 /* direct snapped/virtual snapdir requests
726 * based on parent dir inode */
727 struct dentry
*dn
= get_nonsnap_parent(parent
);
729 dout("__choose_mds using nonsnap parent %p\n", inode
);
732 inode
= req
->r_dentry
->d_inode
;
733 if (!inode
|| mode
== USE_AUTH_MDS
) {
736 hash
= ceph_dentry_hash(dir
, req
->r_dentry
);
742 dout("__choose_mds %p is_hash=%d (%d) mode %d\n", inode
, (int)is_hash
,
746 ci
= ceph_inode(inode
);
748 if (is_hash
&& S_ISDIR(inode
->i_mode
)) {
749 struct ceph_inode_frag frag
;
752 ceph_choose_frag(ci
, hash
, &frag
, &found
);
754 if (mode
== USE_ANY_MDS
&& frag
.ndist
> 0) {
757 /* choose a random replica */
758 get_random_bytes(&r
, 1);
761 dout("choose_mds %p %llx.%llx "
762 "frag %u mds%d (%d/%d)\n",
763 inode
, ceph_vinop(inode
),
766 if (ceph_mdsmap_get_state(mdsc
->mdsmap
, mds
) >=
767 CEPH_MDS_STATE_ACTIVE
)
771 /* since this file/dir wasn't known to be
772 * replicated, then we want to look for the
773 * authoritative mds. */
776 /* choose auth mds */
778 dout("choose_mds %p %llx.%llx "
779 "frag %u mds%d (auth)\n",
780 inode
, ceph_vinop(inode
), frag
.frag
, mds
);
781 if (ceph_mdsmap_get_state(mdsc
->mdsmap
, mds
) >=
782 CEPH_MDS_STATE_ACTIVE
)
788 spin_lock(&ci
->i_ceph_lock
);
790 if (mode
== USE_AUTH_MDS
)
791 cap
= ci
->i_auth_cap
;
792 if (!cap
&& !RB_EMPTY_ROOT(&ci
->i_caps
))
793 cap
= rb_entry(rb_first(&ci
->i_caps
), struct ceph_cap
, ci_node
);
795 spin_unlock(&ci
->i_ceph_lock
);
798 mds
= cap
->session
->s_mds
;
799 dout("choose_mds %p %llx.%llx mds%d (%scap %p)\n",
800 inode
, ceph_vinop(inode
), mds
,
801 cap
== ci
->i_auth_cap
? "auth " : "", cap
);
802 spin_unlock(&ci
->i_ceph_lock
);
806 mds
= ceph_mdsmap_get_random_mds(mdsc
->mdsmap
);
807 dout("choose_mds chose random mds%d\n", mds
);
815 static struct ceph_msg
*create_session_msg(u32 op
, u64 seq
)
817 struct ceph_msg
*msg
;
818 struct ceph_mds_session_head
*h
;
820 msg
= ceph_msg_new(CEPH_MSG_CLIENT_SESSION
, sizeof(*h
), GFP_NOFS
,
823 pr_err("create_session_msg ENOMEM creating msg\n");
826 h
= msg
->front
.iov_base
;
827 h
->op
= cpu_to_le32(op
);
828 h
->seq
= cpu_to_le64(seq
);
834 * session message, specialization for CEPH_SESSION_REQUEST_OPEN
835 * to include additional client metadata fields.
837 static struct ceph_msg
*create_session_open_msg(struct ceph_mds_client
*mdsc
, u64 seq
)
839 struct ceph_msg
*msg
;
840 struct ceph_mds_session_head
*h
;
842 int metadata_bytes
= 0;
843 int metadata_key_count
= 0;
844 struct ceph_options
*opt
= mdsc
->fsc
->client
->options
;
847 const char* metadata
[][2] = {
848 {"hostname", utsname()->nodename
},
849 {"kernel_version", utsname()->release
},
850 {"entity_id", opt
->name
? opt
->name
: ""},
854 /* Calculate serialized length of metadata */
855 metadata_bytes
= 4; /* map length */
856 for (i
= 0; metadata
[i
][0] != NULL
; ++i
) {
857 metadata_bytes
+= 8 + strlen(metadata
[i
][0]) +
858 strlen(metadata
[i
][1]);
859 metadata_key_count
++;
862 /* Allocate the message */
863 msg
= ceph_msg_new(CEPH_MSG_CLIENT_SESSION
, sizeof(*h
) + metadata_bytes
,
866 pr_err("create_session_msg ENOMEM creating msg\n");
869 h
= msg
->front
.iov_base
;
870 h
->op
= cpu_to_le32(CEPH_SESSION_REQUEST_OPEN
);
871 h
->seq
= cpu_to_le64(seq
);
874 * Serialize client metadata into waiting buffer space, using
875 * the format that userspace expects for map<string, string>
877 * ClientSession messages with metadata are v2
879 msg
->hdr
.version
= cpu_to_le16(2);
880 msg
->hdr
.compat_version
= cpu_to_le16(1);
882 /* The write pointer, following the session_head structure */
883 p
= msg
->front
.iov_base
+ sizeof(*h
);
885 /* Number of entries in the map */
886 ceph_encode_32(&p
, metadata_key_count
);
888 /* Two length-prefixed strings for each entry in the map */
889 for (i
= 0; metadata
[i
][0] != NULL
; ++i
) {
890 size_t const key_len
= strlen(metadata
[i
][0]);
891 size_t const val_len
= strlen(metadata
[i
][1]);
893 ceph_encode_32(&p
, key_len
);
894 memcpy(p
, metadata
[i
][0], key_len
);
896 ceph_encode_32(&p
, val_len
);
897 memcpy(p
, metadata
[i
][1], val_len
);
905 * send session open request.
907 * called under mdsc->mutex
909 static int __open_session(struct ceph_mds_client
*mdsc
,
910 struct ceph_mds_session
*session
)
912 struct ceph_msg
*msg
;
914 int mds
= session
->s_mds
;
916 /* wait for mds to go active? */
917 mstate
= ceph_mdsmap_get_state(mdsc
->mdsmap
, mds
);
918 dout("open_session to mds%d (%s)\n", mds
,
919 ceph_mds_state_name(mstate
));
920 session
->s_state
= CEPH_MDS_SESSION_OPENING
;
921 session
->s_renew_requested
= jiffies
;
923 /* send connect message */
924 msg
= create_session_open_msg(mdsc
, session
->s_seq
);
927 ceph_con_send(&session
->s_con
, msg
);
932 * open sessions for any export targets for the given mds
934 * called under mdsc->mutex
936 static struct ceph_mds_session
*
937 __open_export_target_session(struct ceph_mds_client
*mdsc
, int target
)
939 struct ceph_mds_session
*session
;
941 session
= __ceph_lookup_mds_session(mdsc
, target
);
943 session
= register_session(mdsc
, target
);
947 if (session
->s_state
== CEPH_MDS_SESSION_NEW
||
948 session
->s_state
== CEPH_MDS_SESSION_CLOSING
)
949 __open_session(mdsc
, session
);
954 struct ceph_mds_session
*
955 ceph_mdsc_open_export_target_session(struct ceph_mds_client
*mdsc
, int target
)
957 struct ceph_mds_session
*session
;
959 dout("open_export_target_session to mds%d\n", target
);
961 mutex_lock(&mdsc
->mutex
);
962 session
= __open_export_target_session(mdsc
, target
);
963 mutex_unlock(&mdsc
->mutex
);
968 static void __open_export_target_sessions(struct ceph_mds_client
*mdsc
,
969 struct ceph_mds_session
*session
)
971 struct ceph_mds_info
*mi
;
972 struct ceph_mds_session
*ts
;
973 int i
, mds
= session
->s_mds
;
975 if (mds
>= mdsc
->mdsmap
->m_max_mds
)
978 mi
= &mdsc
->mdsmap
->m_info
[mds
];
979 dout("open_export_target_sessions for mds%d (%d targets)\n",
980 session
->s_mds
, mi
->num_export_targets
);
982 for (i
= 0; i
< mi
->num_export_targets
; i
++) {
983 ts
= __open_export_target_session(mdsc
, mi
->export_targets
[i
]);
985 ceph_put_mds_session(ts
);
989 void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client
*mdsc
,
990 struct ceph_mds_session
*session
)
992 mutex_lock(&mdsc
->mutex
);
993 __open_export_target_sessions(mdsc
, session
);
994 mutex_unlock(&mdsc
->mutex
);
1002 * Free preallocated cap messages assigned to this session
1004 static void cleanup_cap_releases(struct ceph_mds_session
*session
)
1006 struct ceph_msg
*msg
;
1008 spin_lock(&session
->s_cap_lock
);
1009 while (!list_empty(&session
->s_cap_releases
)) {
1010 msg
= list_first_entry(&session
->s_cap_releases
,
1011 struct ceph_msg
, list_head
);
1012 list_del_init(&msg
->list_head
);
1015 while (!list_empty(&session
->s_cap_releases_done
)) {
1016 msg
= list_first_entry(&session
->s_cap_releases_done
,
1017 struct ceph_msg
, list_head
);
1018 list_del_init(&msg
->list_head
);
1021 spin_unlock(&session
->s_cap_lock
);
1025 * Helper to safely iterate over all caps associated with a session, with
1026 * special care taken to handle a racing __ceph_remove_cap().
1028 * Caller must hold session s_mutex.
1030 static int iterate_session_caps(struct ceph_mds_session
*session
,
1031 int (*cb
)(struct inode
*, struct ceph_cap
*,
1034 struct list_head
*p
;
1035 struct ceph_cap
*cap
;
1036 struct inode
*inode
, *last_inode
= NULL
;
1037 struct ceph_cap
*old_cap
= NULL
;
1040 dout("iterate_session_caps %p mds%d\n", session
, session
->s_mds
);
1041 spin_lock(&session
->s_cap_lock
);
1042 p
= session
->s_caps
.next
;
1043 while (p
!= &session
->s_caps
) {
1044 cap
= list_entry(p
, struct ceph_cap
, session_caps
);
1045 inode
= igrab(&cap
->ci
->vfs_inode
);
1050 session
->s_cap_iterator
= cap
;
1051 spin_unlock(&session
->s_cap_lock
);
1058 ceph_put_cap(session
->s_mdsc
, old_cap
);
1062 ret
= cb(inode
, cap
, arg
);
1065 spin_lock(&session
->s_cap_lock
);
1067 if (cap
->ci
== NULL
) {
1068 dout("iterate_session_caps finishing cap %p removal\n",
1070 BUG_ON(cap
->session
!= session
);
1071 list_del_init(&cap
->session_caps
);
1072 session
->s_nr_caps
--;
1073 cap
->session
= NULL
;
1074 old_cap
= cap
; /* put_cap it w/o locks held */
1081 session
->s_cap_iterator
= NULL
;
1082 spin_unlock(&session
->s_cap_lock
);
1086 ceph_put_cap(session
->s_mdsc
, old_cap
);
1091 static int remove_session_caps_cb(struct inode
*inode
, struct ceph_cap
*cap
,
1094 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1097 dout("removing cap %p, ci is %p, inode is %p\n",
1098 cap
, ci
, &ci
->vfs_inode
);
1099 spin_lock(&ci
->i_ceph_lock
);
1100 __ceph_remove_cap(cap
, false);
1101 if (!__ceph_is_any_real_caps(ci
)) {
1102 struct ceph_mds_client
*mdsc
=
1103 ceph_sb_to_client(inode
->i_sb
)->mdsc
;
1105 spin_lock(&mdsc
->cap_dirty_lock
);
1106 if (!list_empty(&ci
->i_dirty_item
)) {
1107 pr_info(" dropping dirty %s state for %p %lld\n",
1108 ceph_cap_string(ci
->i_dirty_caps
),
1109 inode
, ceph_ino(inode
));
1110 ci
->i_dirty_caps
= 0;
1111 list_del_init(&ci
->i_dirty_item
);
1114 if (!list_empty(&ci
->i_flushing_item
)) {
1115 pr_info(" dropping dirty+flushing %s state for %p %lld\n",
1116 ceph_cap_string(ci
->i_flushing_caps
),
1117 inode
, ceph_ino(inode
));
1118 ci
->i_flushing_caps
= 0;
1119 list_del_init(&ci
->i_flushing_item
);
1120 mdsc
->num_cap_flushing
--;
1123 if (drop
&& ci
->i_wrbuffer_ref
) {
1124 pr_info(" dropping dirty data for %p %lld\n",
1125 inode
, ceph_ino(inode
));
1126 ci
->i_wrbuffer_ref
= 0;
1127 ci
->i_wrbuffer_ref_head
= 0;
1130 spin_unlock(&mdsc
->cap_dirty_lock
);
1132 spin_unlock(&ci
->i_ceph_lock
);
1139 * caller must hold session s_mutex
1141 static void remove_session_caps(struct ceph_mds_session
*session
)
1143 dout("remove_session_caps on %p\n", session
);
1144 iterate_session_caps(session
, remove_session_caps_cb
, NULL
);
1146 spin_lock(&session
->s_cap_lock
);
1147 if (session
->s_nr_caps
> 0) {
1148 struct super_block
*sb
= session
->s_mdsc
->fsc
->sb
;
1149 struct inode
*inode
;
1150 struct ceph_cap
*cap
, *prev
= NULL
;
1151 struct ceph_vino vino
;
1153 * iterate_session_caps() skips inodes that are being
1154 * deleted, we need to wait until deletions are complete.
1155 * __wait_on_freeing_inode() is designed for the job,
1156 * but it is not exported, so use lookup inode function
1159 while (!list_empty(&session
->s_caps
)) {
1160 cap
= list_entry(session
->s_caps
.next
,
1161 struct ceph_cap
, session_caps
);
1165 vino
= cap
->ci
->i_vino
;
1166 spin_unlock(&session
->s_cap_lock
);
1168 inode
= ceph_find_inode(sb
, vino
);
1171 spin_lock(&session
->s_cap_lock
);
1174 spin_unlock(&session
->s_cap_lock
);
1176 BUG_ON(session
->s_nr_caps
> 0);
1177 BUG_ON(!list_empty(&session
->s_cap_flushing
));
1178 cleanup_cap_releases(session
);
1182 * wake up any threads waiting on this session's caps. if the cap is
1183 * old (didn't get renewed on the client reconnect), remove it now.
1185 * caller must hold s_mutex.
1187 static int wake_up_session_cb(struct inode
*inode
, struct ceph_cap
*cap
,
1190 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1192 wake_up_all(&ci
->i_cap_wq
);
1194 spin_lock(&ci
->i_ceph_lock
);
1195 ci
->i_wanted_max_size
= 0;
1196 ci
->i_requested_max_size
= 0;
1197 spin_unlock(&ci
->i_ceph_lock
);
1202 static void wake_up_session_caps(struct ceph_mds_session
*session
,
1205 dout("wake_up_session_caps %p mds%d\n", session
, session
->s_mds
);
1206 iterate_session_caps(session
, wake_up_session_cb
,
1207 (void *)(unsigned long)reconnect
);
1211 * Send periodic message to MDS renewing all currently held caps. The
1212 * ack will reset the expiration for all caps from this session.
1214 * caller holds s_mutex
1216 static int send_renew_caps(struct ceph_mds_client
*mdsc
,
1217 struct ceph_mds_session
*session
)
1219 struct ceph_msg
*msg
;
1222 if (time_after_eq(jiffies
, session
->s_cap_ttl
) &&
1223 time_after_eq(session
->s_cap_ttl
, session
->s_renew_requested
))
1224 pr_info("mds%d caps stale\n", session
->s_mds
);
1225 session
->s_renew_requested
= jiffies
;
1227 /* do not try to renew caps until a recovering mds has reconnected
1228 * with its clients. */
1229 state
= ceph_mdsmap_get_state(mdsc
->mdsmap
, session
->s_mds
);
1230 if (state
< CEPH_MDS_STATE_RECONNECT
) {
1231 dout("send_renew_caps ignoring mds%d (%s)\n",
1232 session
->s_mds
, ceph_mds_state_name(state
));
1236 dout("send_renew_caps to mds%d (%s)\n", session
->s_mds
,
1237 ceph_mds_state_name(state
));
1238 msg
= create_session_msg(CEPH_SESSION_REQUEST_RENEWCAPS
,
1239 ++session
->s_renew_seq
);
1242 ceph_con_send(&session
->s_con
, msg
);
1246 static int send_flushmsg_ack(struct ceph_mds_client
*mdsc
,
1247 struct ceph_mds_session
*session
, u64 seq
)
1249 struct ceph_msg
*msg
;
1251 dout("send_flushmsg_ack to mds%d (%s)s seq %lld\n",
1252 session
->s_mds
, ceph_session_state_name(session
->s_state
), seq
);
1253 msg
= create_session_msg(CEPH_SESSION_FLUSHMSG_ACK
, seq
);
1256 ceph_con_send(&session
->s_con
, msg
);
1262 * Note new cap ttl, and any transition from stale -> not stale (fresh?).
1264 * Called under session->s_mutex
1266 static void renewed_caps(struct ceph_mds_client
*mdsc
,
1267 struct ceph_mds_session
*session
, int is_renew
)
1272 spin_lock(&session
->s_cap_lock
);
1273 was_stale
= is_renew
&& time_after_eq(jiffies
, session
->s_cap_ttl
);
1275 session
->s_cap_ttl
= session
->s_renew_requested
+
1276 mdsc
->mdsmap
->m_session_timeout
*HZ
;
1279 if (time_before(jiffies
, session
->s_cap_ttl
)) {
1280 pr_info("mds%d caps renewed\n", session
->s_mds
);
1283 pr_info("mds%d caps still stale\n", session
->s_mds
);
1286 dout("renewed_caps mds%d ttl now %lu, was %s, now %s\n",
1287 session
->s_mds
, session
->s_cap_ttl
, was_stale
? "stale" : "fresh",
1288 time_before(jiffies
, session
->s_cap_ttl
) ? "stale" : "fresh");
1289 spin_unlock(&session
->s_cap_lock
);
1292 wake_up_session_caps(session
, 0);
1296 * send a session close request
1298 static int request_close_session(struct ceph_mds_client
*mdsc
,
1299 struct ceph_mds_session
*session
)
1301 struct ceph_msg
*msg
;
1303 dout("request_close_session mds%d state %s seq %lld\n",
1304 session
->s_mds
, ceph_session_state_name(session
->s_state
),
1306 msg
= create_session_msg(CEPH_SESSION_REQUEST_CLOSE
, session
->s_seq
);
1309 ceph_con_send(&session
->s_con
, msg
);
1314 * Called with s_mutex held.
1316 static int __close_session(struct ceph_mds_client
*mdsc
,
1317 struct ceph_mds_session
*session
)
1319 if (session
->s_state
>= CEPH_MDS_SESSION_CLOSING
)
1321 session
->s_state
= CEPH_MDS_SESSION_CLOSING
;
1322 return request_close_session(mdsc
, session
);
1326 * Trim old(er) caps.
1328 * Because we can't cache an inode without one or more caps, we do
1329 * this indirectly: if a cap is unused, we prune its aliases, at which
1330 * point the inode will hopefully get dropped to.
1332 * Yes, this is a bit sloppy. Our only real goal here is to respond to
1333 * memory pressure from the MDS, though, so it needn't be perfect.
1335 static int trim_caps_cb(struct inode
*inode
, struct ceph_cap
*cap
, void *arg
)
1337 struct ceph_mds_session
*session
= arg
;
1338 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1339 int used
, wanted
, oissued
, mine
;
1341 if (session
->s_trim_caps
<= 0)
1344 spin_lock(&ci
->i_ceph_lock
);
1345 mine
= cap
->issued
| cap
->implemented
;
1346 used
= __ceph_caps_used(ci
);
1347 wanted
= __ceph_caps_file_wanted(ci
);
1348 oissued
= __ceph_caps_issued_other(ci
, cap
);
1350 dout("trim_caps_cb %p cap %p mine %s oissued %s used %s wanted %s\n",
1351 inode
, cap
, ceph_cap_string(mine
), ceph_cap_string(oissued
),
1352 ceph_cap_string(used
), ceph_cap_string(wanted
));
1353 if (cap
== ci
->i_auth_cap
) {
1354 if (ci
->i_dirty_caps
| ci
->i_flushing_caps
)
1356 if ((used
| wanted
) & CEPH_CAP_ANY_WR
)
1359 if ((used
| wanted
) & ~oissued
& mine
)
1360 goto out
; /* we need these caps */
1362 session
->s_trim_caps
--;
1364 /* we aren't the only cap.. just remove us */
1365 __ceph_remove_cap(cap
, true);
1367 /* try to drop referring dentries */
1368 spin_unlock(&ci
->i_ceph_lock
);
1369 d_prune_aliases(inode
);
1370 dout("trim_caps_cb %p cap %p pruned, count now %d\n",
1371 inode
, cap
, atomic_read(&inode
->i_count
));
1376 spin_unlock(&ci
->i_ceph_lock
);
1381 * Trim session cap count down to some max number.
1383 static int trim_caps(struct ceph_mds_client
*mdsc
,
1384 struct ceph_mds_session
*session
,
1387 int trim_caps
= session
->s_nr_caps
- max_caps
;
1389 dout("trim_caps mds%d start: %d / %d, trim %d\n",
1390 session
->s_mds
, session
->s_nr_caps
, max_caps
, trim_caps
);
1391 if (trim_caps
> 0) {
1392 session
->s_trim_caps
= trim_caps
;
1393 iterate_session_caps(session
, trim_caps_cb
, session
);
1394 dout("trim_caps mds%d done: %d / %d, trimmed %d\n",
1395 session
->s_mds
, session
->s_nr_caps
, max_caps
,
1396 trim_caps
- session
->s_trim_caps
);
1397 session
->s_trim_caps
= 0;
1400 ceph_add_cap_releases(mdsc
, session
);
1401 ceph_send_cap_releases(mdsc
, session
);
1406 * Allocate cap_release messages. If there is a partially full message
1407 * in the queue, try to allocate enough to cover it's remainder, so that
1408 * we can send it immediately.
1410 * Called under s_mutex.
1412 int ceph_add_cap_releases(struct ceph_mds_client
*mdsc
,
1413 struct ceph_mds_session
*session
)
1415 struct ceph_msg
*msg
, *partial
= NULL
;
1416 struct ceph_mds_cap_release
*head
;
1418 int extra
= mdsc
->fsc
->mount_options
->cap_release_safety
;
1421 dout("add_cap_releases %p mds%d extra %d\n", session
, session
->s_mds
,
1424 spin_lock(&session
->s_cap_lock
);
1426 if (!list_empty(&session
->s_cap_releases
)) {
1427 msg
= list_first_entry(&session
->s_cap_releases
,
1430 head
= msg
->front
.iov_base
;
1431 num
= le32_to_cpu(head
->num
);
1433 dout(" partial %p with (%d/%d)\n", msg
, num
,
1434 (int)CEPH_CAPS_PER_RELEASE
);
1435 extra
+= CEPH_CAPS_PER_RELEASE
- num
;
1439 while (session
->s_num_cap_releases
< session
->s_nr_caps
+ extra
) {
1440 spin_unlock(&session
->s_cap_lock
);
1441 msg
= ceph_msg_new(CEPH_MSG_CLIENT_CAPRELEASE
, PAGE_CACHE_SIZE
,
1445 dout("add_cap_releases %p msg %p now %d\n", session
, msg
,
1446 (int)msg
->front
.iov_len
);
1447 head
= msg
->front
.iov_base
;
1448 head
->num
= cpu_to_le32(0);
1449 msg
->front
.iov_len
= sizeof(*head
);
1450 spin_lock(&session
->s_cap_lock
);
1451 list_add(&msg
->list_head
, &session
->s_cap_releases
);
1452 session
->s_num_cap_releases
+= CEPH_CAPS_PER_RELEASE
;
1456 head
= partial
->front
.iov_base
;
1457 num
= le32_to_cpu(head
->num
);
1458 dout(" queueing partial %p with %d/%d\n", partial
, num
,
1459 (int)CEPH_CAPS_PER_RELEASE
);
1460 list_move_tail(&partial
->list_head
,
1461 &session
->s_cap_releases_done
);
1462 session
->s_num_cap_releases
-= CEPH_CAPS_PER_RELEASE
- num
;
1465 spin_unlock(&session
->s_cap_lock
);
1470 static int check_cap_flush(struct inode
*inode
, u64 want_flush_seq
)
1472 struct ceph_inode_info
*ci
= ceph_inode(inode
);
1474 spin_lock(&ci
->i_ceph_lock
);
1475 if (ci
->i_flushing_caps
)
1476 ret
= ci
->i_cap_flush_seq
>= want_flush_seq
;
1479 spin_unlock(&ci
->i_ceph_lock
);
1484 * flush all dirty inode data to disk.
1486 * returns true if we've flushed through want_flush_seq
1488 static void wait_caps_flush(struct ceph_mds_client
*mdsc
, u64 want_flush_seq
)
1492 dout("check_cap_flush want %lld\n", want_flush_seq
);
1493 mutex_lock(&mdsc
->mutex
);
1494 for (mds
= 0; mds
< mdsc
->max_sessions
; mds
++) {
1495 struct ceph_mds_session
*session
= mdsc
->sessions
[mds
];
1496 struct inode
*inode
= NULL
;
1500 get_session(session
);
1501 mutex_unlock(&mdsc
->mutex
);
1503 mutex_lock(&session
->s_mutex
);
1504 if (!list_empty(&session
->s_cap_flushing
)) {
1505 struct ceph_inode_info
*ci
=
1506 list_entry(session
->s_cap_flushing
.next
,
1507 struct ceph_inode_info
,
1510 if (!check_cap_flush(&ci
->vfs_inode
, want_flush_seq
)) {
1511 dout("check_cap_flush still flushing %p "
1512 "seq %lld <= %lld to mds%d\n",
1513 &ci
->vfs_inode
, ci
->i_cap_flush_seq
,
1514 want_flush_seq
, session
->s_mds
);
1515 inode
= igrab(&ci
->vfs_inode
);
1518 mutex_unlock(&session
->s_mutex
);
1519 ceph_put_mds_session(session
);
1522 wait_event(mdsc
->cap_flushing_wq
,
1523 check_cap_flush(inode
, want_flush_seq
));
1527 mutex_lock(&mdsc
->mutex
);
1530 mutex_unlock(&mdsc
->mutex
);
1531 dout("check_cap_flush ok, flushed thru %lld\n", want_flush_seq
);
1535 * called under s_mutex
1537 void ceph_send_cap_releases(struct ceph_mds_client
*mdsc
,
1538 struct ceph_mds_session
*session
)
1540 struct ceph_msg
*msg
;
1542 dout("send_cap_releases mds%d\n", session
->s_mds
);
1543 spin_lock(&session
->s_cap_lock
);
1544 while (!list_empty(&session
->s_cap_releases_done
)) {
1545 msg
= list_first_entry(&session
->s_cap_releases_done
,
1546 struct ceph_msg
, list_head
);
1547 list_del_init(&msg
->list_head
);
1548 spin_unlock(&session
->s_cap_lock
);
1549 msg
->hdr
.front_len
= cpu_to_le32(msg
->front
.iov_len
);
1550 dout("send_cap_releases mds%d %p\n", session
->s_mds
, msg
);
1551 ceph_con_send(&session
->s_con
, msg
);
1552 spin_lock(&session
->s_cap_lock
);
1554 spin_unlock(&session
->s_cap_lock
);
1557 static void discard_cap_releases(struct ceph_mds_client
*mdsc
,
1558 struct ceph_mds_session
*session
)
1560 struct ceph_msg
*msg
;
1561 struct ceph_mds_cap_release
*head
;
1564 dout("discard_cap_releases mds%d\n", session
->s_mds
);
1566 if (!list_empty(&session
->s_cap_releases
)) {
1567 /* zero out the in-progress message */
1568 msg
= list_first_entry(&session
->s_cap_releases
,
1569 struct ceph_msg
, list_head
);
1570 head
= msg
->front
.iov_base
;
1571 num
= le32_to_cpu(head
->num
);
1572 dout("discard_cap_releases mds%d %p %u\n",
1573 session
->s_mds
, msg
, num
);
1574 head
->num
= cpu_to_le32(0);
1575 msg
->front
.iov_len
= sizeof(*head
);
1576 session
->s_num_cap_releases
+= num
;
1579 /* requeue completed messages */
1580 while (!list_empty(&session
->s_cap_releases_done
)) {
1581 msg
= list_first_entry(&session
->s_cap_releases_done
,
1582 struct ceph_msg
, list_head
);
1583 list_del_init(&msg
->list_head
);
1585 head
= msg
->front
.iov_base
;
1586 num
= le32_to_cpu(head
->num
);
1587 dout("discard_cap_releases mds%d %p %u\n", session
->s_mds
, msg
,
1589 session
->s_num_cap_releases
+= num
;
1590 head
->num
= cpu_to_le32(0);
1591 msg
->front
.iov_len
= sizeof(*head
);
1592 list_add(&msg
->list_head
, &session
->s_cap_releases
);
1600 int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request
*req
,
1603 struct ceph_inode_info
*ci
= ceph_inode(dir
);
1604 struct ceph_mds_reply_info_parsed
*rinfo
= &req
->r_reply_info
;
1605 struct ceph_mount_options
*opt
= req
->r_mdsc
->fsc
->mount_options
;
1606 size_t size
= sizeof(*rinfo
->dir_in
) + sizeof(*rinfo
->dir_dname_len
) +
1607 sizeof(*rinfo
->dir_dname
) + sizeof(*rinfo
->dir_dlease
);
1608 int order
, num_entries
;
1610 spin_lock(&ci
->i_ceph_lock
);
1611 num_entries
= ci
->i_files
+ ci
->i_subdirs
;
1612 spin_unlock(&ci
->i_ceph_lock
);
1613 num_entries
= max(num_entries
, 1);
1614 num_entries
= min(num_entries
, opt
->max_readdir
);
1616 order
= get_order(size
* num_entries
);
1617 while (order
>= 0) {
1618 rinfo
->dir_in
= (void*)__get_free_pages(GFP_NOFS
| __GFP_NOWARN
,
1627 num_entries
= (PAGE_SIZE
<< order
) / size
;
1628 num_entries
= min(num_entries
, opt
->max_readdir
);
1630 rinfo
->dir_buf_size
= PAGE_SIZE
<< order
;
1631 req
->r_num_caps
= num_entries
+ 1;
1632 req
->r_args
.readdir
.max_entries
= cpu_to_le32(num_entries
);
1633 req
->r_args
.readdir
.max_bytes
= cpu_to_le32(opt
->max_readdir_bytes
);
1638 * Create an mds request.
1640 struct ceph_mds_request
*
1641 ceph_mdsc_create_request(struct ceph_mds_client
*mdsc
, int op
, int mode
)
1643 struct ceph_mds_request
*req
= kzalloc(sizeof(*req
), GFP_NOFS
);
1646 return ERR_PTR(-ENOMEM
);
1648 mutex_init(&req
->r_fill_mutex
);
1650 req
->r_started
= jiffies
;
1651 req
->r_resend_mds
= -1;
1652 INIT_LIST_HEAD(&req
->r_unsafe_dir_item
);
1654 kref_init(&req
->r_kref
);
1655 INIT_LIST_HEAD(&req
->r_wait
);
1656 init_completion(&req
->r_completion
);
1657 init_completion(&req
->r_safe_completion
);
1658 INIT_LIST_HEAD(&req
->r_unsafe_item
);
1660 req
->r_stamp
= CURRENT_TIME
;
1663 req
->r_direct_mode
= mode
;
1668 * return oldest (lowest) request, tid in request tree, 0 if none.
1670 * called under mdsc->mutex.
1672 static struct ceph_mds_request
*__get_oldest_req(struct ceph_mds_client
*mdsc
)
1674 if (RB_EMPTY_ROOT(&mdsc
->request_tree
))
1676 return rb_entry(rb_first(&mdsc
->request_tree
),
1677 struct ceph_mds_request
, r_node
);
1680 static u64
__get_oldest_tid(struct ceph_mds_client
*mdsc
)
1682 struct ceph_mds_request
*req
= __get_oldest_req(mdsc
);
1690 * Build a dentry's path. Allocate on heap; caller must kfree. Based
1691 * on build_path_from_dentry in fs/cifs/dir.c.
1693 * If @stop_on_nosnap, generate path relative to the first non-snapped
1696 * Encode hidden .snap dirs as a double /, i.e.
1697 * foo/.snap/bar -> foo//bar
1699 char *ceph_mdsc_build_path(struct dentry
*dentry
, int *plen
, u64
*base
,
1702 struct dentry
*temp
;
1708 return ERR_PTR(-EINVAL
);
1712 seq
= read_seqbegin(&rename_lock
);
1714 for (temp
= dentry
; !IS_ROOT(temp
);) {
1715 struct inode
*inode
= temp
->d_inode
;
1716 if (inode
&& ceph_snap(inode
) == CEPH_SNAPDIR
)
1717 len
++; /* slash only */
1718 else if (stop_on_nosnap
&& inode
&&
1719 ceph_snap(inode
) == CEPH_NOSNAP
)
1722 len
+= 1 + temp
->d_name
.len
;
1723 temp
= temp
->d_parent
;
1727 len
--; /* no leading '/' */
1729 path
= kmalloc(len
+1, GFP_NOFS
);
1731 return ERR_PTR(-ENOMEM
);
1733 path
[pos
] = 0; /* trailing null */
1735 for (temp
= dentry
; !IS_ROOT(temp
) && pos
!= 0; ) {
1736 struct inode
*inode
;
1738 spin_lock(&temp
->d_lock
);
1739 inode
= temp
->d_inode
;
1740 if (inode
&& ceph_snap(inode
) == CEPH_SNAPDIR
) {
1741 dout("build_path path+%d: %p SNAPDIR\n",
1743 } else if (stop_on_nosnap
&& inode
&&
1744 ceph_snap(inode
) == CEPH_NOSNAP
) {
1745 spin_unlock(&temp
->d_lock
);
1748 pos
-= temp
->d_name
.len
;
1750 spin_unlock(&temp
->d_lock
);
1753 strncpy(path
+ pos
, temp
->d_name
.name
,
1756 spin_unlock(&temp
->d_lock
);
1759 temp
= temp
->d_parent
;
1762 if (pos
!= 0 || read_seqretry(&rename_lock
, seq
)) {
1763 pr_err("build_path did not end path lookup where "
1764 "expected, namelen is %d, pos is %d\n", len
, pos
);
1765 /* presumably this is only possible if racing with a
1766 rename of one of the parent directories (we can not
1767 lock the dentries above us to prevent this, but
1768 retrying should be harmless) */
1773 *base
= ceph_ino(temp
->d_inode
);
1775 dout("build_path on %p %d built %llx '%.*s'\n",
1776 dentry
, d_count(dentry
), *base
, len
, path
);
1780 static int build_dentry_path(struct dentry
*dentry
,
1781 const char **ppath
, int *ppathlen
, u64
*pino
,
1786 if (ceph_snap(dentry
->d_parent
->d_inode
) == CEPH_NOSNAP
) {
1787 *pino
= ceph_ino(dentry
->d_parent
->d_inode
);
1788 *ppath
= dentry
->d_name
.name
;
1789 *ppathlen
= dentry
->d_name
.len
;
1792 path
= ceph_mdsc_build_path(dentry
, ppathlen
, pino
, 1);
1794 return PTR_ERR(path
);
1800 static int build_inode_path(struct inode
*inode
,
1801 const char **ppath
, int *ppathlen
, u64
*pino
,
1804 struct dentry
*dentry
;
1807 if (ceph_snap(inode
) == CEPH_NOSNAP
) {
1808 *pino
= ceph_ino(inode
);
1812 dentry
= d_find_alias(inode
);
1813 path
= ceph_mdsc_build_path(dentry
, ppathlen
, pino
, 1);
1816 return PTR_ERR(path
);
1823 * request arguments may be specified via an inode *, a dentry *, or
1824 * an explicit ino+path.
1826 static int set_request_path_attr(struct inode
*rinode
, struct dentry
*rdentry
,
1827 const char *rpath
, u64 rino
,
1828 const char **ppath
, int *pathlen
,
1829 u64
*ino
, int *freepath
)
1834 r
= build_inode_path(rinode
, ppath
, pathlen
, ino
, freepath
);
1835 dout(" inode %p %llx.%llx\n", rinode
, ceph_ino(rinode
),
1837 } else if (rdentry
) {
1838 r
= build_dentry_path(rdentry
, ppath
, pathlen
, ino
, freepath
);
1839 dout(" dentry %p %llx/%.*s\n", rdentry
, *ino
, *pathlen
,
1841 } else if (rpath
|| rino
) {
1844 *pathlen
= rpath
? strlen(rpath
) : 0;
1845 dout(" path %.*s\n", *pathlen
, rpath
);
1852 * called under mdsc->mutex
1854 static struct ceph_msg
*create_request_message(struct ceph_mds_client
*mdsc
,
1855 struct ceph_mds_request
*req
,
1858 struct ceph_msg
*msg
;
1859 struct ceph_mds_request_head
*head
;
1860 const char *path1
= NULL
;
1861 const char *path2
= NULL
;
1862 u64 ino1
= 0, ino2
= 0;
1863 int pathlen1
= 0, pathlen2
= 0;
1864 int freepath1
= 0, freepath2
= 0;
1870 ret
= set_request_path_attr(req
->r_inode
, req
->r_dentry
,
1871 req
->r_path1
, req
->r_ino1
.ino
,
1872 &path1
, &pathlen1
, &ino1
, &freepath1
);
1878 ret
= set_request_path_attr(NULL
, req
->r_old_dentry
,
1879 req
->r_path2
, req
->r_ino2
.ino
,
1880 &path2
, &pathlen2
, &ino2
, &freepath2
);
1886 len
= sizeof(*head
) +
1887 pathlen1
+ pathlen2
+ 2*(1 + sizeof(u32
) + sizeof(u64
)) +
1888 sizeof(struct timespec
);
1890 /* calculate (max) length for cap releases */
1891 len
+= sizeof(struct ceph_mds_request_release
) *
1892 (!!req
->r_inode_drop
+ !!req
->r_dentry_drop
+
1893 !!req
->r_old_inode_drop
+ !!req
->r_old_dentry_drop
);
1894 if (req
->r_dentry_drop
)
1895 len
+= req
->r_dentry
->d_name
.len
;
1896 if (req
->r_old_dentry_drop
)
1897 len
+= req
->r_old_dentry
->d_name
.len
;
1899 msg
= ceph_msg_new(CEPH_MSG_CLIENT_REQUEST
, len
, GFP_NOFS
, false);
1901 msg
= ERR_PTR(-ENOMEM
);
1905 msg
->hdr
.version
= cpu_to_le16(2);
1906 msg
->hdr
.tid
= cpu_to_le64(req
->r_tid
);
1908 head
= msg
->front
.iov_base
;
1909 p
= msg
->front
.iov_base
+ sizeof(*head
);
1910 end
= msg
->front
.iov_base
+ msg
->front
.iov_len
;
1912 head
->mdsmap_epoch
= cpu_to_le32(mdsc
->mdsmap
->m_epoch
);
1913 head
->op
= cpu_to_le32(req
->r_op
);
1914 head
->caller_uid
= cpu_to_le32(from_kuid(&init_user_ns
, req
->r_uid
));
1915 head
->caller_gid
= cpu_to_le32(from_kgid(&init_user_ns
, req
->r_gid
));
1916 head
->args
= req
->r_args
;
1918 ceph_encode_filepath(&p
, end
, ino1
, path1
);
1919 ceph_encode_filepath(&p
, end
, ino2
, path2
);
1921 /* make note of release offset, in case we need to replay */
1922 req
->r_request_release_offset
= p
- msg
->front
.iov_base
;
1926 if (req
->r_inode_drop
)
1927 releases
+= ceph_encode_inode_release(&p
,
1928 req
->r_inode
? req
->r_inode
: req
->r_dentry
->d_inode
,
1929 mds
, req
->r_inode_drop
, req
->r_inode_unless
, 0);
1930 if (req
->r_dentry_drop
)
1931 releases
+= ceph_encode_dentry_release(&p
, req
->r_dentry
,
1932 mds
, req
->r_dentry_drop
, req
->r_dentry_unless
);
1933 if (req
->r_old_dentry_drop
)
1934 releases
+= ceph_encode_dentry_release(&p
, req
->r_old_dentry
,
1935 mds
, req
->r_old_dentry_drop
, req
->r_old_dentry_unless
);
1936 if (req
->r_old_inode_drop
)
1937 releases
+= ceph_encode_inode_release(&p
,
1938 req
->r_old_dentry
->d_inode
,
1939 mds
, req
->r_old_inode_drop
, req
->r_old_inode_unless
, 0);
1940 head
->num_releases
= cpu_to_le16(releases
);
1944 struct ceph_timespec ts
;
1945 ceph_encode_timespec(&ts
, &req
->r_stamp
);
1946 ceph_encode_copy(&p
, &ts
, sizeof(ts
));
1950 msg
->front
.iov_len
= p
- msg
->front
.iov_base
;
1951 msg
->hdr
.front_len
= cpu_to_le32(msg
->front
.iov_len
);
1953 if (req
->r_pagelist
) {
1954 struct ceph_pagelist
*pagelist
= req
->r_pagelist
;
1955 atomic_inc(&pagelist
->refcnt
);
1956 ceph_msg_data_add_pagelist(msg
, pagelist
);
1957 msg
->hdr
.data_len
= cpu_to_le32(pagelist
->length
);
1959 msg
->hdr
.data_len
= 0;
1962 msg
->hdr
.data_off
= cpu_to_le16(0);
1966 kfree((char *)path2
);
1969 kfree((char *)path1
);
1975 * called under mdsc->mutex if error, under no mutex if
1978 static void complete_request(struct ceph_mds_client
*mdsc
,
1979 struct ceph_mds_request
*req
)
1981 if (req
->r_callback
)
1982 req
->r_callback(mdsc
, req
);
1984 complete_all(&req
->r_completion
);
1988 * called under mdsc->mutex
1990 static int __prepare_send_request(struct ceph_mds_client
*mdsc
,
1991 struct ceph_mds_request
*req
,
1994 struct ceph_mds_request_head
*rhead
;
1995 struct ceph_msg
*msg
;
2000 struct ceph_cap
*cap
=
2001 ceph_get_cap_for_mds(ceph_inode(req
->r_inode
), mds
);
2004 req
->r_sent_on_mseq
= cap
->mseq
;
2006 req
->r_sent_on_mseq
= -1;
2008 dout("prepare_send_request %p tid %lld %s (attempt %d)\n", req
,
2009 req
->r_tid
, ceph_mds_op_name(req
->r_op
), req
->r_attempts
);
2011 if (req
->r_got_unsafe
) {
2014 * Replay. Do not regenerate message (and rebuild
2015 * paths, etc.); just use the original message.
2016 * Rebuilding paths will break for renames because
2017 * d_move mangles the src name.
2019 msg
= req
->r_request
;
2020 rhead
= msg
->front
.iov_base
;
2022 flags
= le32_to_cpu(rhead
->flags
);
2023 flags
|= CEPH_MDS_FLAG_REPLAY
;
2024 rhead
->flags
= cpu_to_le32(flags
);
2026 if (req
->r_target_inode
)
2027 rhead
->ino
= cpu_to_le64(ceph_ino(req
->r_target_inode
));
2029 rhead
->num_retry
= req
->r_attempts
- 1;
2031 /* remove cap/dentry releases from message */
2032 rhead
->num_releases
= 0;
2035 p
= msg
->front
.iov_base
+ req
->r_request_release_offset
;
2037 struct ceph_timespec ts
;
2038 ceph_encode_timespec(&ts
, &req
->r_stamp
);
2039 ceph_encode_copy(&p
, &ts
, sizeof(ts
));
2042 msg
->front
.iov_len
= p
- msg
->front
.iov_base
;
2043 msg
->hdr
.front_len
= cpu_to_le32(msg
->front
.iov_len
);
2047 if (req
->r_request
) {
2048 ceph_msg_put(req
->r_request
);
2049 req
->r_request
= NULL
;
2051 msg
= create_request_message(mdsc
, req
, mds
);
2053 req
->r_err
= PTR_ERR(msg
);
2054 complete_request(mdsc
, req
);
2055 return PTR_ERR(msg
);
2057 req
->r_request
= msg
;
2059 rhead
= msg
->front
.iov_base
;
2060 rhead
->oldest_client_tid
= cpu_to_le64(__get_oldest_tid(mdsc
));
2061 if (req
->r_got_unsafe
)
2062 flags
|= CEPH_MDS_FLAG_REPLAY
;
2063 if (req
->r_locked_dir
)
2064 flags
|= CEPH_MDS_FLAG_WANT_DENTRY
;
2065 rhead
->flags
= cpu_to_le32(flags
);
2066 rhead
->num_fwd
= req
->r_num_fwd
;
2067 rhead
->num_retry
= req
->r_attempts
- 1;
2070 dout(" r_locked_dir = %p\n", req
->r_locked_dir
);
2075 * send request, or put it on the appropriate wait list.
2077 static int __do_request(struct ceph_mds_client
*mdsc
,
2078 struct ceph_mds_request
*req
)
2080 struct ceph_mds_session
*session
= NULL
;
2084 if (req
->r_err
|| req
->r_got_result
) {
2086 __unregister_request(mdsc
, req
);
2090 if (req
->r_timeout
&&
2091 time_after_eq(jiffies
, req
->r_started
+ req
->r_timeout
)) {
2092 dout("do_request timed out\n");
2097 put_request_session(req
);
2099 mds
= __choose_mds(mdsc
, req
);
2101 ceph_mdsmap_get_state(mdsc
->mdsmap
, mds
) < CEPH_MDS_STATE_ACTIVE
) {
2102 dout("do_request no mds or not active, waiting for map\n");
2103 list_add(&req
->r_wait
, &mdsc
->waiting_for_map
);
2107 /* get, open session */
2108 session
= __ceph_lookup_mds_session(mdsc
, mds
);
2110 session
= register_session(mdsc
, mds
);
2111 if (IS_ERR(session
)) {
2112 err
= PTR_ERR(session
);
2116 req
->r_session
= get_session(session
);
2118 dout("do_request mds%d session %p state %s\n", mds
, session
,
2119 ceph_session_state_name(session
->s_state
));
2120 if (session
->s_state
!= CEPH_MDS_SESSION_OPEN
&&
2121 session
->s_state
!= CEPH_MDS_SESSION_HUNG
) {
2122 if (session
->s_state
== CEPH_MDS_SESSION_NEW
||
2123 session
->s_state
== CEPH_MDS_SESSION_CLOSING
)
2124 __open_session(mdsc
, session
);
2125 list_add(&req
->r_wait
, &session
->s_waiting
);
2130 req
->r_resend_mds
= -1; /* forget any previous mds hint */
2132 if (req
->r_request_started
== 0) /* note request start time */
2133 req
->r_request_started
= jiffies
;
2135 err
= __prepare_send_request(mdsc
, req
, mds
);
2137 ceph_msg_get(req
->r_request
);
2138 ceph_con_send(&session
->s_con
, req
->r_request
);
2142 ceph_put_mds_session(session
);
2148 complete_request(mdsc
, req
);
2153 * called under mdsc->mutex
2155 static void __wake_requests(struct ceph_mds_client
*mdsc
,
2156 struct list_head
*head
)
2158 struct ceph_mds_request
*req
;
2159 LIST_HEAD(tmp_list
);
2161 list_splice_init(head
, &tmp_list
);
2163 while (!list_empty(&tmp_list
)) {
2164 req
= list_entry(tmp_list
.next
,
2165 struct ceph_mds_request
, r_wait
);
2166 list_del_init(&req
->r_wait
);
2167 dout(" wake request %p tid %llu\n", req
, req
->r_tid
);
2168 __do_request(mdsc
, req
);
2173 * Wake up threads with requests pending for @mds, so that they can
2174 * resubmit their requests to a possibly different mds.
2176 static void kick_requests(struct ceph_mds_client
*mdsc
, int mds
)
2178 struct ceph_mds_request
*req
;
2179 struct rb_node
*p
= rb_first(&mdsc
->request_tree
);
2181 dout("kick_requests mds%d\n", mds
);
2183 req
= rb_entry(p
, struct ceph_mds_request
, r_node
);
2185 if (req
->r_got_unsafe
)
2187 if (req
->r_attempts
> 0)
2188 continue; /* only new requests */
2189 if (req
->r_session
&&
2190 req
->r_session
->s_mds
== mds
) {
2191 dout(" kicking tid %llu\n", req
->r_tid
);
2192 list_del_init(&req
->r_wait
);
2193 __do_request(mdsc
, req
);
2198 void ceph_mdsc_submit_request(struct ceph_mds_client
*mdsc
,
2199 struct ceph_mds_request
*req
)
2201 dout("submit_request on %p\n", req
);
2202 mutex_lock(&mdsc
->mutex
);
2203 __register_request(mdsc
, req
, NULL
);
2204 __do_request(mdsc
, req
);
2205 mutex_unlock(&mdsc
->mutex
);
2209 * Synchrously perform an mds request. Take care of all of the
2210 * session setup, forwarding, retry details.
2212 int ceph_mdsc_do_request(struct ceph_mds_client
*mdsc
,
2214 struct ceph_mds_request
*req
)
2218 dout("do_request on %p\n", req
);
2220 /* take CAP_PIN refs for r_inode, r_locked_dir, r_old_dentry */
2222 ceph_get_cap_refs(ceph_inode(req
->r_inode
), CEPH_CAP_PIN
);
2223 if (req
->r_locked_dir
)
2224 ceph_get_cap_refs(ceph_inode(req
->r_locked_dir
), CEPH_CAP_PIN
);
2225 if (req
->r_old_dentry_dir
)
2226 ceph_get_cap_refs(ceph_inode(req
->r_old_dentry_dir
),
2230 mutex_lock(&mdsc
->mutex
);
2231 __register_request(mdsc
, req
, dir
);
2232 __do_request(mdsc
, req
);
2236 __unregister_request(mdsc
, req
);
2237 dout("do_request early error %d\n", err
);
2242 mutex_unlock(&mdsc
->mutex
);
2243 dout("do_request waiting\n");
2244 if (req
->r_timeout
) {
2245 err
= (long)wait_for_completion_killable_timeout(
2246 &req
->r_completion
, req
->r_timeout
);
2249 } else if (req
->r_wait_for_completion
) {
2250 err
= req
->r_wait_for_completion(mdsc
, req
);
2252 err
= wait_for_completion_killable(&req
->r_completion
);
2254 dout("do_request waited, got %d\n", err
);
2255 mutex_lock(&mdsc
->mutex
);
2257 /* only abort if we didn't race with a real reply */
2258 if (req
->r_got_result
) {
2259 err
= le32_to_cpu(req
->r_reply_info
.head
->result
);
2260 } else if (err
< 0) {
2261 dout("aborted request %lld with %d\n", req
->r_tid
, err
);
2264 * ensure we aren't running concurrently with
2265 * ceph_fill_trace or ceph_readdir_prepopulate, which
2266 * rely on locks (dir mutex) held by our caller.
2268 mutex_lock(&req
->r_fill_mutex
);
2270 req
->r_aborted
= true;
2271 mutex_unlock(&req
->r_fill_mutex
);
2273 if (req
->r_locked_dir
&&
2274 (req
->r_op
& CEPH_MDS_OP_WRITE
))
2275 ceph_invalidate_dir_request(req
);
2281 mutex_unlock(&mdsc
->mutex
);
2282 dout("do_request %p done, result %d\n", req
, err
);
2287 * Invalidate dir's completeness, dentry lease state on an aborted MDS
2288 * namespace request.
2290 void ceph_invalidate_dir_request(struct ceph_mds_request
*req
)
2292 struct inode
*inode
= req
->r_locked_dir
;
2294 dout("invalidate_dir_request %p (complete, lease(s))\n", inode
);
2296 ceph_dir_clear_complete(inode
);
2298 ceph_invalidate_dentry_lease(req
->r_dentry
);
2299 if (req
->r_old_dentry
)
2300 ceph_invalidate_dentry_lease(req
->r_old_dentry
);
2306 * We take the session mutex and parse and process the reply immediately.
2307 * This preserves the logical ordering of replies, capabilities, etc., sent
2308 * by the MDS as they are applied to our local cache.
2310 static void handle_reply(struct ceph_mds_session
*session
, struct ceph_msg
*msg
)
2312 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
2313 struct ceph_mds_request
*req
;
2314 struct ceph_mds_reply_head
*head
= msg
->front
.iov_base
;
2315 struct ceph_mds_reply_info_parsed
*rinfo
; /* parsed reply info */
2316 struct ceph_snap_realm
*realm
;
2319 int mds
= session
->s_mds
;
2321 if (msg
->front
.iov_len
< sizeof(*head
)) {
2322 pr_err("mdsc_handle_reply got corrupt (short) reply\n");
2327 /* get request, session */
2328 tid
= le64_to_cpu(msg
->hdr
.tid
);
2329 mutex_lock(&mdsc
->mutex
);
2330 req
= __lookup_request(mdsc
, tid
);
2332 dout("handle_reply on unknown tid %llu\n", tid
);
2333 mutex_unlock(&mdsc
->mutex
);
2336 dout("handle_reply %p\n", req
);
2338 /* correct session? */
2339 if (req
->r_session
!= session
) {
2340 pr_err("mdsc_handle_reply got %llu on session mds%d"
2341 " not mds%d\n", tid
, session
->s_mds
,
2342 req
->r_session
? req
->r_session
->s_mds
: -1);
2343 mutex_unlock(&mdsc
->mutex
);
2348 if ((req
->r_got_unsafe
&& !head
->safe
) ||
2349 (req
->r_got_safe
&& head
->safe
)) {
2350 pr_warn("got a dup %s reply on %llu from mds%d\n",
2351 head
->safe
? "safe" : "unsafe", tid
, mds
);
2352 mutex_unlock(&mdsc
->mutex
);
2355 if (req
->r_got_safe
&& !head
->safe
) {
2356 pr_warn("got unsafe after safe on %llu from mds%d\n",
2358 mutex_unlock(&mdsc
->mutex
);
2362 result
= le32_to_cpu(head
->result
);
2366 * if we're not talking to the authority, send to them
2367 * if the authority has changed while we weren't looking,
2368 * send to new authority
2369 * Otherwise we just have to return an ESTALE
2371 if (result
== -ESTALE
) {
2372 dout("got ESTALE on request %llu", req
->r_tid
);
2373 req
->r_resend_mds
= -1;
2374 if (req
->r_direct_mode
!= USE_AUTH_MDS
) {
2375 dout("not using auth, setting for that now");
2376 req
->r_direct_mode
= USE_AUTH_MDS
;
2377 __do_request(mdsc
, req
);
2378 mutex_unlock(&mdsc
->mutex
);
2381 int mds
= __choose_mds(mdsc
, req
);
2382 if (mds
>= 0 && mds
!= req
->r_session
->s_mds
) {
2383 dout("but auth changed, so resending");
2384 __do_request(mdsc
, req
);
2385 mutex_unlock(&mdsc
->mutex
);
2389 dout("have to return ESTALE on request %llu", req
->r_tid
);
2394 req
->r_got_safe
= true;
2395 __unregister_request(mdsc
, req
);
2397 if (req
->r_got_unsafe
) {
2399 * We already handled the unsafe response, now do the
2400 * cleanup. No need to examine the response; the MDS
2401 * doesn't include any result info in the safe
2402 * response. And even if it did, there is nothing
2403 * useful we could do with a revised return value.
2405 dout("got safe reply %llu, mds%d\n", tid
, mds
);
2406 list_del_init(&req
->r_unsafe_item
);
2408 /* last unsafe request during umount? */
2409 if (mdsc
->stopping
&& !__get_oldest_req(mdsc
))
2410 complete_all(&mdsc
->safe_umount_waiters
);
2411 mutex_unlock(&mdsc
->mutex
);
2415 req
->r_got_unsafe
= true;
2416 list_add_tail(&req
->r_unsafe_item
, &req
->r_session
->s_unsafe
);
2419 dout("handle_reply tid %lld result %d\n", tid
, result
);
2420 rinfo
= &req
->r_reply_info
;
2421 err
= parse_reply_info(msg
, rinfo
, session
->s_con
.peer_features
);
2422 mutex_unlock(&mdsc
->mutex
);
2424 mutex_lock(&session
->s_mutex
);
2426 pr_err("mdsc_handle_reply got corrupt reply mds%d(tid:%lld)\n", mds
, tid
);
2433 if (rinfo
->snapblob_len
) {
2434 down_write(&mdsc
->snap_rwsem
);
2435 ceph_update_snap_trace(mdsc
, rinfo
->snapblob
,
2436 rinfo
->snapblob
+ rinfo
->snapblob_len
,
2437 le32_to_cpu(head
->op
) == CEPH_MDS_OP_RMSNAP
,
2439 downgrade_write(&mdsc
->snap_rwsem
);
2441 down_read(&mdsc
->snap_rwsem
);
2444 /* insert trace into our cache */
2445 mutex_lock(&req
->r_fill_mutex
);
2446 err
= ceph_fill_trace(mdsc
->fsc
->sb
, req
, req
->r_session
);
2448 if (result
== 0 && (req
->r_op
== CEPH_MDS_OP_READDIR
||
2449 req
->r_op
== CEPH_MDS_OP_LSSNAP
))
2450 ceph_readdir_prepopulate(req
, req
->r_session
);
2451 ceph_unreserve_caps(mdsc
, &req
->r_caps_reservation
);
2453 mutex_unlock(&req
->r_fill_mutex
);
2455 up_read(&mdsc
->snap_rwsem
);
2457 ceph_put_snap_realm(mdsc
, realm
);
2459 mutex_lock(&mdsc
->mutex
);
2460 if (!req
->r_aborted
) {
2466 req
->r_got_result
= true;
2469 dout("reply arrived after request %lld was aborted\n", tid
);
2471 mutex_unlock(&mdsc
->mutex
);
2473 ceph_add_cap_releases(mdsc
, req
->r_session
);
2474 mutex_unlock(&session
->s_mutex
);
2476 /* kick calling process */
2477 complete_request(mdsc
, req
);
2479 ceph_mdsc_put_request(req
);
2486 * handle mds notification that our request has been forwarded.
2488 static void handle_forward(struct ceph_mds_client
*mdsc
,
2489 struct ceph_mds_session
*session
,
2490 struct ceph_msg
*msg
)
2492 struct ceph_mds_request
*req
;
2493 u64 tid
= le64_to_cpu(msg
->hdr
.tid
);
2497 void *p
= msg
->front
.iov_base
;
2498 void *end
= p
+ msg
->front
.iov_len
;
2500 ceph_decode_need(&p
, end
, 2*sizeof(u32
), bad
);
2501 next_mds
= ceph_decode_32(&p
);
2502 fwd_seq
= ceph_decode_32(&p
);
2504 mutex_lock(&mdsc
->mutex
);
2505 req
= __lookup_request(mdsc
, tid
);
2507 dout("forward tid %llu to mds%d - req dne\n", tid
, next_mds
);
2508 goto out
; /* dup reply? */
2511 if (req
->r_aborted
) {
2512 dout("forward tid %llu aborted, unregistering\n", tid
);
2513 __unregister_request(mdsc
, req
);
2514 } else if (fwd_seq
<= req
->r_num_fwd
) {
2515 dout("forward tid %llu to mds%d - old seq %d <= %d\n",
2516 tid
, next_mds
, req
->r_num_fwd
, fwd_seq
);
2518 /* resend. forward race not possible; mds would drop */
2519 dout("forward tid %llu to mds%d (we resend)\n", tid
, next_mds
);
2521 BUG_ON(req
->r_got_result
);
2522 req
->r_attempts
= 0;
2523 req
->r_num_fwd
= fwd_seq
;
2524 req
->r_resend_mds
= next_mds
;
2525 put_request_session(req
);
2526 __do_request(mdsc
, req
);
2528 ceph_mdsc_put_request(req
);
2530 mutex_unlock(&mdsc
->mutex
);
2534 pr_err("mdsc_handle_forward decode error err=%d\n", err
);
2538 * handle a mds session control message
2540 static void handle_session(struct ceph_mds_session
*session
,
2541 struct ceph_msg
*msg
)
2543 struct ceph_mds_client
*mdsc
= session
->s_mdsc
;
2546 int mds
= session
->s_mds
;
2547 struct ceph_mds_session_head
*h
= msg
->front
.iov_base
;
2551 if (msg
->front
.iov_len
!= sizeof(*h
))
2553 op
= le32_to_cpu(h
->op
);
2554 seq
= le64_to_cpu(h
->seq
);
2556 mutex_lock(&mdsc
->mutex
);
2557 if (op
== CEPH_SESSION_CLOSE
)
2558 __unregister_session(mdsc
, session
);
2559 /* FIXME: this ttl calculation is generous */
2560 session
->s_ttl
= jiffies
+ HZ
*mdsc
->mdsmap
->m_session_autoclose
;
2561 mutex_unlock(&mdsc
->mutex
);
2563 mutex_lock(&session
->s_mutex
);
2565 dout("handle_session mds%d %s %p state %s seq %llu\n",
2566 mds
, ceph_session_op_name(op
), session
,
2567 ceph_session_state_name(session
->s_state
), seq
);
2569 if (session
->s_state
== CEPH_MDS_SESSION_HUNG
) {
2570 session
->s_state
= CEPH_MDS_SESSION_OPEN
;
2571 pr_info("mds%d came back\n", session
->s_mds
);
2575 case CEPH_SESSION_OPEN
:
2576 if (session
->s_state
== CEPH_MDS_SESSION_RECONNECTING
)
2577 pr_info("mds%d reconnect success\n", session
->s_mds
);
2578 session
->s_state
= CEPH_MDS_SESSION_OPEN
;
2579 renewed_caps(mdsc
, session
, 0);
2582 __close_session(mdsc
, session
);
2585 case CEPH_SESSION_RENEWCAPS
:
2586 if (session
->s_renew_seq
== seq
)
2587 renewed_caps(mdsc
, session
, 1);
2590 case CEPH_SESSION_CLOSE
:
2591 if (session
->s_state
== CEPH_MDS_SESSION_RECONNECTING
)
2592 pr_info("mds%d reconnect denied\n", session
->s_mds
);
2593 remove_session_caps(session
);
2594 wake
= 2; /* for good measure */
2595 wake_up_all(&mdsc
->session_close_wq
);
2598 case CEPH_SESSION_STALE
:
2599 pr_info("mds%d caps went stale, renewing\n",
2601 spin_lock(&session
->s_gen_ttl_lock
);
2602 session
->s_cap_gen
++;
2603 session
->s_cap_ttl
= jiffies
- 1;
2604 spin_unlock(&session
->s_gen_ttl_lock
);
2605 send_renew_caps(mdsc
, session
);
2608 case CEPH_SESSION_RECALL_STATE
:
2609 trim_caps(mdsc
, session
, le32_to_cpu(h
->max_caps
));
2612 case CEPH_SESSION_FLUSHMSG
:
2613 send_flushmsg_ack(mdsc
, session
, seq
);
2616 case CEPH_SESSION_FORCE_RO
:
2617 dout("force_session_readonly %p\n", session
);
2618 spin_lock(&session
->s_cap_lock
);
2619 session
->s_readonly
= true;
2620 spin_unlock(&session
->s_cap_lock
);
2621 wake_up_session_caps(session
, 0);
2625 pr_err("mdsc_handle_session bad op %d mds%d\n", op
, mds
);
2629 mutex_unlock(&session
->s_mutex
);
2631 mutex_lock(&mdsc
->mutex
);
2632 __wake_requests(mdsc
, &session
->s_waiting
);
2634 kick_requests(mdsc
, mds
);
2635 mutex_unlock(&mdsc
->mutex
);
2640 pr_err("mdsc_handle_session corrupt message mds%d len %d\n", mds
,
2641 (int)msg
->front
.iov_len
);
2648 * called under session->mutex.
2650 static void replay_unsafe_requests(struct ceph_mds_client
*mdsc
,
2651 struct ceph_mds_session
*session
)
2653 struct ceph_mds_request
*req
, *nreq
;
2657 dout("replay_unsafe_requests mds%d\n", session
->s_mds
);
2659 mutex_lock(&mdsc
->mutex
);
2660 list_for_each_entry_safe(req
, nreq
, &session
->s_unsafe
, r_unsafe_item
) {
2661 err
= __prepare_send_request(mdsc
, req
, session
->s_mds
);
2663 ceph_msg_get(req
->r_request
);
2664 ceph_con_send(&session
->s_con
, req
->r_request
);
2669 * also re-send old requests when MDS enters reconnect stage. So that MDS
2670 * can process completed request in clientreplay stage.
2672 p
= rb_first(&mdsc
->request_tree
);
2674 req
= rb_entry(p
, struct ceph_mds_request
, r_node
);
2676 if (req
->r_got_unsafe
)
2678 if (req
->r_attempts
== 0)
2679 continue; /* only old requests */
2680 if (req
->r_session
&&
2681 req
->r_session
->s_mds
== session
->s_mds
) {
2682 err
= __prepare_send_request(mdsc
, req
, session
->s_mds
);
2684 ceph_msg_get(req
->r_request
);
2685 ceph_con_send(&session
->s_con
, req
->r_request
);
2689 mutex_unlock(&mdsc
->mutex
);
2693 * Encode information about a cap for a reconnect with the MDS.
2695 static int encode_caps_cb(struct inode
*inode
, struct ceph_cap
*cap
,
2699 struct ceph_mds_cap_reconnect v2
;
2700 struct ceph_mds_cap_reconnect_v1 v1
;
2703 struct ceph_inode_info
*ci
;
2704 struct ceph_reconnect_state
*recon_state
= arg
;
2705 struct ceph_pagelist
*pagelist
= recon_state
->pagelist
;
2709 struct dentry
*dentry
;
2713 dout(" adding %p ino %llx.%llx cap %p %lld %s\n",
2714 inode
, ceph_vinop(inode
), cap
, cap
->cap_id
,
2715 ceph_cap_string(cap
->issued
));
2716 err
= ceph_pagelist_encode_64(pagelist
, ceph_ino(inode
));
2720 dentry
= d_find_alias(inode
);
2722 path
= ceph_mdsc_build_path(dentry
, &pathlen
, &pathbase
, 0);
2724 err
= PTR_ERR(path
);
2731 err
= ceph_pagelist_encode_string(pagelist
, path
, pathlen
);
2735 spin_lock(&ci
->i_ceph_lock
);
2736 cap
->seq
= 0; /* reset cap seq */
2737 cap
->issue_seq
= 0; /* and issue_seq */
2738 cap
->mseq
= 0; /* and migrate_seq */
2739 cap
->cap_gen
= cap
->session
->s_cap_gen
;
2741 if (recon_state
->flock
) {
2742 rec
.v2
.cap_id
= cpu_to_le64(cap
->cap_id
);
2743 rec
.v2
.wanted
= cpu_to_le32(__ceph_caps_wanted(ci
));
2744 rec
.v2
.issued
= cpu_to_le32(cap
->issued
);
2745 rec
.v2
.snaprealm
= cpu_to_le64(ci
->i_snap_realm
->ino
);
2746 rec
.v2
.pathbase
= cpu_to_le64(pathbase
);
2747 rec
.v2
.flock_len
= 0;
2748 reclen
= sizeof(rec
.v2
);
2750 rec
.v1
.cap_id
= cpu_to_le64(cap
->cap_id
);
2751 rec
.v1
.wanted
= cpu_to_le32(__ceph_caps_wanted(ci
));
2752 rec
.v1
.issued
= cpu_to_le32(cap
->issued
);
2753 rec
.v1
.size
= cpu_to_le64(inode
->i_size
);
2754 ceph_encode_timespec(&rec
.v1
.mtime
, &inode
->i_mtime
);
2755 ceph_encode_timespec(&rec
.v1
.atime
, &inode
->i_atime
);
2756 rec
.v1
.snaprealm
= cpu_to_le64(ci
->i_snap_realm
->ino
);
2757 rec
.v1
.pathbase
= cpu_to_le64(pathbase
);
2758 reclen
= sizeof(rec
.v1
);
2760 spin_unlock(&ci
->i_ceph_lock
);
2762 if (recon_state
->flock
) {
2763 int num_fcntl_locks
, num_flock_locks
;
2764 struct ceph_filelock
*flocks
;
2767 ceph_count_locks(inode
, &num_fcntl_locks
, &num_flock_locks
);
2768 flocks
= kmalloc((num_fcntl_locks
+num_flock_locks
) *
2769 sizeof(struct ceph_filelock
), GFP_NOFS
);
2774 err
= ceph_encode_locks_to_buffer(inode
, flocks
,
2784 * number of encoded locks is stable, so copy to pagelist
2786 rec
.v2
.flock_len
= cpu_to_le32(2*sizeof(u32
) +
2787 (num_fcntl_locks
+num_flock_locks
) *
2788 sizeof(struct ceph_filelock
));
2789 err
= ceph_pagelist_append(pagelist
, &rec
, reclen
);
2791 err
= ceph_locks_to_pagelist(flocks
, pagelist
,
2796 err
= ceph_pagelist_append(pagelist
, &rec
, reclen
);
2799 recon_state
->nr_caps
++;
2809 * If an MDS fails and recovers, clients need to reconnect in order to
2810 * reestablish shared state. This includes all caps issued through
2811 * this session _and_ the snap_realm hierarchy. Because it's not
2812 * clear which snap realms the mds cares about, we send everything we
2813 * know about.. that ensures we'll then get any new info the
2814 * recovering MDS might have.
2816 * This is a relatively heavyweight operation, but it's rare.
2818 * called with mdsc->mutex held.
2820 static void send_mds_reconnect(struct ceph_mds_client
*mdsc
,
2821 struct ceph_mds_session
*session
)
2823 struct ceph_msg
*reply
;
2825 int mds
= session
->s_mds
;
2828 struct ceph_pagelist
*pagelist
;
2829 struct ceph_reconnect_state recon_state
;
2831 pr_info("mds%d reconnect start\n", mds
);
2833 pagelist
= kmalloc(sizeof(*pagelist
), GFP_NOFS
);
2835 goto fail_nopagelist
;
2836 ceph_pagelist_init(pagelist
);
2838 reply
= ceph_msg_new(CEPH_MSG_CLIENT_RECONNECT
, 0, GFP_NOFS
, false);
2842 mutex_lock(&session
->s_mutex
);
2843 session
->s_state
= CEPH_MDS_SESSION_RECONNECTING
;
2846 dout("session %p state %s\n", session
,
2847 ceph_session_state_name(session
->s_state
));
2849 spin_lock(&session
->s_gen_ttl_lock
);
2850 session
->s_cap_gen
++;
2851 spin_unlock(&session
->s_gen_ttl_lock
);
2853 spin_lock(&session
->s_cap_lock
);
2854 /* don't know if session is readonly */
2855 session
->s_readonly
= 0;
2857 * notify __ceph_remove_cap() that we are composing cap reconnect.
2858 * If a cap get released before being added to the cap reconnect,
2859 * __ceph_remove_cap() should skip queuing cap release.
2861 session
->s_cap_reconnect
= 1;
2862 /* drop old cap expires; we're about to reestablish that state */
2863 discard_cap_releases(mdsc
, session
);
2864 spin_unlock(&session
->s_cap_lock
);
2866 /* trim unused caps to reduce MDS's cache rejoin time */
2867 shrink_dcache_parent(mdsc
->fsc
->sb
->s_root
);
2869 ceph_con_close(&session
->s_con
);
2870 ceph_con_open(&session
->s_con
,
2871 CEPH_ENTITY_TYPE_MDS
, mds
,
2872 ceph_mdsmap_get_addr(mdsc
->mdsmap
, mds
));
2874 /* replay unsafe requests */
2875 replay_unsafe_requests(mdsc
, session
);
2877 down_read(&mdsc
->snap_rwsem
);
2879 /* traverse this session's caps */
2880 s_nr_caps
= session
->s_nr_caps
;
2881 err
= ceph_pagelist_encode_32(pagelist
, s_nr_caps
);
2885 recon_state
.nr_caps
= 0;
2886 recon_state
.pagelist
= pagelist
;
2887 recon_state
.flock
= session
->s_con
.peer_features
& CEPH_FEATURE_FLOCK
;
2888 err
= iterate_session_caps(session
, encode_caps_cb
, &recon_state
);
2892 spin_lock(&session
->s_cap_lock
);
2893 session
->s_cap_reconnect
= 0;
2894 spin_unlock(&session
->s_cap_lock
);
2897 * snaprealms. we provide mds with the ino, seq (version), and
2898 * parent for all of our realms. If the mds has any newer info,
2901 for (p
= rb_first(&mdsc
->snap_realms
); p
; p
= rb_next(p
)) {
2902 struct ceph_snap_realm
*realm
=
2903 rb_entry(p
, struct ceph_snap_realm
, node
);
2904 struct ceph_mds_snaprealm_reconnect sr_rec
;
2906 dout(" adding snap realm %llx seq %lld parent %llx\n",
2907 realm
->ino
, realm
->seq
, realm
->parent_ino
);
2908 sr_rec
.ino
= cpu_to_le64(realm
->ino
);
2909 sr_rec
.seq
= cpu_to_le64(realm
->seq
);
2910 sr_rec
.parent
= cpu_to_le64(realm
->parent_ino
);
2911 err
= ceph_pagelist_append(pagelist
, &sr_rec
, sizeof(sr_rec
));
2916 if (recon_state
.flock
)
2917 reply
->hdr
.version
= cpu_to_le16(2);
2919 /* raced with cap release? */
2920 if (s_nr_caps
!= recon_state
.nr_caps
) {
2921 struct page
*page
= list_first_entry(&pagelist
->head
,
2923 __le32
*addr
= kmap_atomic(page
);
2924 *addr
= cpu_to_le32(recon_state
.nr_caps
);
2925 kunmap_atomic(addr
);
2928 reply
->hdr
.data_len
= cpu_to_le32(pagelist
->length
);
2929 ceph_msg_data_add_pagelist(reply
, pagelist
);
2930 ceph_con_send(&session
->s_con
, reply
);
2932 mutex_unlock(&session
->s_mutex
);
2934 mutex_lock(&mdsc
->mutex
);
2935 __wake_requests(mdsc
, &session
->s_waiting
);
2936 mutex_unlock(&mdsc
->mutex
);
2938 up_read(&mdsc
->snap_rwsem
);
2942 ceph_msg_put(reply
);
2943 up_read(&mdsc
->snap_rwsem
);
2944 mutex_unlock(&session
->s_mutex
);
2946 ceph_pagelist_release(pagelist
);
2948 pr_err("error %d preparing reconnect for mds%d\n", err
, mds
);
2954 * compare old and new mdsmaps, kicking requests
2955 * and closing out old connections as necessary
2957 * called under mdsc->mutex.
2959 static void check_new_map(struct ceph_mds_client
*mdsc
,
2960 struct ceph_mdsmap
*newmap
,
2961 struct ceph_mdsmap
*oldmap
)
2964 int oldstate
, newstate
;
2965 struct ceph_mds_session
*s
;
2967 dout("check_new_map new %u old %u\n",
2968 newmap
->m_epoch
, oldmap
->m_epoch
);
2970 for (i
= 0; i
< oldmap
->m_max_mds
&& i
< mdsc
->max_sessions
; i
++) {
2971 if (mdsc
->sessions
[i
] == NULL
)
2973 s
= mdsc
->sessions
[i
];
2974 oldstate
= ceph_mdsmap_get_state(oldmap
, i
);
2975 newstate
= ceph_mdsmap_get_state(newmap
, i
);
2977 dout("check_new_map mds%d state %s%s -> %s%s (session %s)\n",
2978 i
, ceph_mds_state_name(oldstate
),
2979 ceph_mdsmap_is_laggy(oldmap
, i
) ? " (laggy)" : "",
2980 ceph_mds_state_name(newstate
),
2981 ceph_mdsmap_is_laggy(newmap
, i
) ? " (laggy)" : "",
2982 ceph_session_state_name(s
->s_state
));
2984 if (i
>= newmap
->m_max_mds
||
2985 memcmp(ceph_mdsmap_get_addr(oldmap
, i
),
2986 ceph_mdsmap_get_addr(newmap
, i
),
2987 sizeof(struct ceph_entity_addr
))) {
2988 if (s
->s_state
== CEPH_MDS_SESSION_OPENING
) {
2989 /* the session never opened, just close it
2991 __wake_requests(mdsc
, &s
->s_waiting
);
2992 __unregister_session(mdsc
, s
);
2995 mutex_unlock(&mdsc
->mutex
);
2996 mutex_lock(&s
->s_mutex
);
2997 mutex_lock(&mdsc
->mutex
);
2998 ceph_con_close(&s
->s_con
);
2999 mutex_unlock(&s
->s_mutex
);
3000 s
->s_state
= CEPH_MDS_SESSION_RESTARTING
;
3002 } else if (oldstate
== newstate
) {
3003 continue; /* nothing new with this mds */
3009 if (s
->s_state
== CEPH_MDS_SESSION_RESTARTING
&&
3010 newstate
>= CEPH_MDS_STATE_RECONNECT
) {
3011 mutex_unlock(&mdsc
->mutex
);
3012 send_mds_reconnect(mdsc
, s
);
3013 mutex_lock(&mdsc
->mutex
);
3017 * kick request on any mds that has gone active.
3019 if (oldstate
< CEPH_MDS_STATE_ACTIVE
&&
3020 newstate
>= CEPH_MDS_STATE_ACTIVE
) {
3021 if (oldstate
!= CEPH_MDS_STATE_CREATING
&&
3022 oldstate
!= CEPH_MDS_STATE_STARTING
)
3023 pr_info("mds%d recovery completed\n", s
->s_mds
);
3024 kick_requests(mdsc
, i
);
3025 ceph_kick_flushing_caps(mdsc
, s
);
3026 wake_up_session_caps(s
, 1);
3030 for (i
= 0; i
< newmap
->m_max_mds
&& i
< mdsc
->max_sessions
; i
++) {
3031 s
= mdsc
->sessions
[i
];
3034 if (!ceph_mdsmap_is_laggy(newmap
, i
))
3036 if (s
->s_state
== CEPH_MDS_SESSION_OPEN
||
3037 s
->s_state
== CEPH_MDS_SESSION_HUNG
||
3038 s
->s_state
== CEPH_MDS_SESSION_CLOSING
) {
3039 dout(" connecting to export targets of laggy mds%d\n",
3041 __open_export_target_sessions(mdsc
, s
);
3053 * caller must hold session s_mutex, dentry->d_lock
3055 void __ceph_mdsc_drop_dentry_lease(struct dentry
*dentry
)
3057 struct ceph_dentry_info
*di
= ceph_dentry(dentry
);
3059 ceph_put_mds_session(di
->lease_session
);
3060 di
->lease_session
= NULL
;
3063 static void handle_lease(struct ceph_mds_client
*mdsc
,
3064 struct ceph_mds_session
*session
,
3065 struct ceph_msg
*msg
)
3067 struct super_block
*sb
= mdsc
->fsc
->sb
;
3068 struct inode
*inode
;
3069 struct dentry
*parent
, *dentry
;
3070 struct ceph_dentry_info
*di
;
3071 int mds
= session
->s_mds
;
3072 struct ceph_mds_lease
*h
= msg
->front
.iov_base
;
3074 struct ceph_vino vino
;
3078 dout("handle_lease from mds%d\n", mds
);
3081 if (msg
->front
.iov_len
< sizeof(*h
) + sizeof(u32
))
3083 vino
.ino
= le64_to_cpu(h
->ino
);
3084 vino
.snap
= CEPH_NOSNAP
;
3085 seq
= le32_to_cpu(h
->seq
);
3086 dname
.name
= (void *)h
+ sizeof(*h
) + sizeof(u32
);
3087 dname
.len
= msg
->front
.iov_len
- sizeof(*h
) - sizeof(u32
);
3088 if (dname
.len
!= get_unaligned_le32(h
+1))
3092 inode
= ceph_find_inode(sb
, vino
);
3093 dout("handle_lease %s, ino %llx %p %.*s\n",
3094 ceph_lease_op_name(h
->action
), vino
.ino
, inode
,
3095 dname
.len
, dname
.name
);
3097 mutex_lock(&session
->s_mutex
);
3100 if (inode
== NULL
) {
3101 dout("handle_lease no inode %llx\n", vino
.ino
);
3106 parent
= d_find_alias(inode
);
3108 dout("no parent dentry on inode %p\n", inode
);
3110 goto release
; /* hrm... */
3112 dname
.hash
= full_name_hash(dname
.name
, dname
.len
);
3113 dentry
= d_lookup(parent
, &dname
);
3118 spin_lock(&dentry
->d_lock
);
3119 di
= ceph_dentry(dentry
);
3120 switch (h
->action
) {
3121 case CEPH_MDS_LEASE_REVOKE
:
3122 if (di
->lease_session
== session
) {
3123 if (ceph_seq_cmp(di
->lease_seq
, seq
) > 0)
3124 h
->seq
= cpu_to_le32(di
->lease_seq
);
3125 __ceph_mdsc_drop_dentry_lease(dentry
);
3130 case CEPH_MDS_LEASE_RENEW
:
3131 if (di
->lease_session
== session
&&
3132 di
->lease_gen
== session
->s_cap_gen
&&
3133 di
->lease_renew_from
&&
3134 di
->lease_renew_after
== 0) {
3135 unsigned long duration
=
3136 le32_to_cpu(h
->duration_ms
) * HZ
/ 1000;
3138 di
->lease_seq
= seq
;
3139 dentry
->d_time
= di
->lease_renew_from
+ duration
;
3140 di
->lease_renew_after
= di
->lease_renew_from
+
3142 di
->lease_renew_from
= 0;
3146 spin_unlock(&dentry
->d_lock
);
3153 /* let's just reuse the same message */
3154 h
->action
= CEPH_MDS_LEASE_REVOKE_ACK
;
3156 ceph_con_send(&session
->s_con
, msg
);
3160 mutex_unlock(&session
->s_mutex
);
3164 pr_err("corrupt lease message\n");
3168 void ceph_mdsc_lease_send_msg(struct ceph_mds_session
*session
,
3169 struct inode
*inode
,
3170 struct dentry
*dentry
, char action
,
3173 struct ceph_msg
*msg
;
3174 struct ceph_mds_lease
*lease
;
3175 int len
= sizeof(*lease
) + sizeof(u32
);
3178 dout("lease_send_msg inode %p dentry %p %s to mds%d\n",
3179 inode
, dentry
, ceph_lease_op_name(action
), session
->s_mds
);
3180 dnamelen
= dentry
->d_name
.len
;
3183 msg
= ceph_msg_new(CEPH_MSG_CLIENT_LEASE
, len
, GFP_NOFS
, false);
3186 lease
= msg
->front
.iov_base
;
3187 lease
->action
= action
;
3188 lease
->ino
= cpu_to_le64(ceph_vino(inode
).ino
);
3189 lease
->first
= lease
->last
= cpu_to_le64(ceph_vino(inode
).snap
);
3190 lease
->seq
= cpu_to_le32(seq
);
3191 put_unaligned_le32(dnamelen
, lease
+ 1);
3192 memcpy((void *)(lease
+ 1) + 4, dentry
->d_name
.name
, dnamelen
);
3195 * if this is a preemptive lease RELEASE, no need to
3196 * flush request stream, since the actual request will
3199 msg
->more_to_follow
= (action
== CEPH_MDS_LEASE_RELEASE
);
3201 ceph_con_send(&session
->s_con
, msg
);
3205 * Preemptively release a lease we expect to invalidate anyway.
3206 * Pass @inode always, @dentry is optional.
3208 void ceph_mdsc_lease_release(struct ceph_mds_client
*mdsc
, struct inode
*inode
,
3209 struct dentry
*dentry
)
3211 struct ceph_dentry_info
*di
;
3212 struct ceph_mds_session
*session
;
3215 BUG_ON(inode
== NULL
);
3216 BUG_ON(dentry
== NULL
);
3218 /* is dentry lease valid? */
3219 spin_lock(&dentry
->d_lock
);
3220 di
= ceph_dentry(dentry
);
3221 if (!di
|| !di
->lease_session
||
3222 di
->lease_session
->s_mds
< 0 ||
3223 di
->lease_gen
!= di
->lease_session
->s_cap_gen
||
3224 !time_before(jiffies
, dentry
->d_time
)) {
3225 dout("lease_release inode %p dentry %p -- "
3228 spin_unlock(&dentry
->d_lock
);
3232 /* we do have a lease on this dentry; note mds and seq */
3233 session
= ceph_get_mds_session(di
->lease_session
);
3234 seq
= di
->lease_seq
;
3235 __ceph_mdsc_drop_dentry_lease(dentry
);
3236 spin_unlock(&dentry
->d_lock
);
3238 dout("lease_release inode %p dentry %p to mds%d\n",
3239 inode
, dentry
, session
->s_mds
);
3240 ceph_mdsc_lease_send_msg(session
, inode
, dentry
,
3241 CEPH_MDS_LEASE_RELEASE
, seq
);
3242 ceph_put_mds_session(session
);
3246 * drop all leases (and dentry refs) in preparation for umount
3248 static void drop_leases(struct ceph_mds_client
*mdsc
)
3252 dout("drop_leases\n");
3253 mutex_lock(&mdsc
->mutex
);
3254 for (i
= 0; i
< mdsc
->max_sessions
; i
++) {
3255 struct ceph_mds_session
*s
= __ceph_lookup_mds_session(mdsc
, i
);
3258 mutex_unlock(&mdsc
->mutex
);
3259 mutex_lock(&s
->s_mutex
);
3260 mutex_unlock(&s
->s_mutex
);
3261 ceph_put_mds_session(s
);
3262 mutex_lock(&mdsc
->mutex
);
3264 mutex_unlock(&mdsc
->mutex
);
3270 * delayed work -- periodically trim expired leases, renew caps with mds
3272 static void schedule_delayed(struct ceph_mds_client
*mdsc
)
3275 unsigned hz
= round_jiffies_relative(HZ
* delay
);
3276 schedule_delayed_work(&mdsc
->delayed_work
, hz
);
3279 static void delayed_work(struct work_struct
*work
)
3282 struct ceph_mds_client
*mdsc
=
3283 container_of(work
, struct ceph_mds_client
, delayed_work
.work
);
3287 dout("mdsc delayed_work\n");
3288 ceph_check_delayed_caps(mdsc
);
3290 mutex_lock(&mdsc
->mutex
);
3291 renew_interval
= mdsc
->mdsmap
->m_session_timeout
>> 2;
3292 renew_caps
= time_after_eq(jiffies
, HZ
*renew_interval
+
3293 mdsc
->last_renew_caps
);
3295 mdsc
->last_renew_caps
= jiffies
;
3297 for (i
= 0; i
< mdsc
->max_sessions
; i
++) {
3298 struct ceph_mds_session
*s
= __ceph_lookup_mds_session(mdsc
, i
);
3301 if (s
->s_state
== CEPH_MDS_SESSION_CLOSING
) {
3302 dout("resending session close request for mds%d\n",
3304 request_close_session(mdsc
, s
);
3305 ceph_put_mds_session(s
);
3308 if (s
->s_ttl
&& time_after(jiffies
, s
->s_ttl
)) {
3309 if (s
->s_state
== CEPH_MDS_SESSION_OPEN
) {
3310 s
->s_state
= CEPH_MDS_SESSION_HUNG
;
3311 pr_info("mds%d hung\n", s
->s_mds
);
3314 if (s
->s_state
< CEPH_MDS_SESSION_OPEN
) {
3315 /* this mds is failed or recovering, just wait */
3316 ceph_put_mds_session(s
);
3319 mutex_unlock(&mdsc
->mutex
);
3321 mutex_lock(&s
->s_mutex
);
3323 send_renew_caps(mdsc
, s
);
3325 ceph_con_keepalive(&s
->s_con
);
3326 ceph_add_cap_releases(mdsc
, s
);
3327 if (s
->s_state
== CEPH_MDS_SESSION_OPEN
||
3328 s
->s_state
== CEPH_MDS_SESSION_HUNG
)
3329 ceph_send_cap_releases(mdsc
, s
);
3330 mutex_unlock(&s
->s_mutex
);
3331 ceph_put_mds_session(s
);
3333 mutex_lock(&mdsc
->mutex
);
3335 mutex_unlock(&mdsc
->mutex
);
3337 schedule_delayed(mdsc
);
3340 int ceph_mdsc_init(struct ceph_fs_client
*fsc
)
3343 struct ceph_mds_client
*mdsc
;
3345 mdsc
= kzalloc(sizeof(struct ceph_mds_client
), GFP_NOFS
);
3350 mutex_init(&mdsc
->mutex
);
3351 mdsc
->mdsmap
= kzalloc(sizeof(*mdsc
->mdsmap
), GFP_NOFS
);
3352 if (mdsc
->mdsmap
== NULL
) {
3357 init_completion(&mdsc
->safe_umount_waiters
);
3358 init_waitqueue_head(&mdsc
->session_close_wq
);
3359 INIT_LIST_HEAD(&mdsc
->waiting_for_map
);
3360 mdsc
->sessions
= NULL
;
3361 atomic_set(&mdsc
->num_sessions
, 0);
3362 mdsc
->max_sessions
= 0;
3364 init_rwsem(&mdsc
->snap_rwsem
);
3365 mdsc
->snap_realms
= RB_ROOT
;
3366 INIT_LIST_HEAD(&mdsc
->snap_empty
);
3367 spin_lock_init(&mdsc
->snap_empty_lock
);
3369 mdsc
->request_tree
= RB_ROOT
;
3370 INIT_DELAYED_WORK(&mdsc
->delayed_work
, delayed_work
);
3371 mdsc
->last_renew_caps
= jiffies
;
3372 INIT_LIST_HEAD(&mdsc
->cap_delay_list
);
3373 spin_lock_init(&mdsc
->cap_delay_lock
);
3374 INIT_LIST_HEAD(&mdsc
->snap_flush_list
);
3375 spin_lock_init(&mdsc
->snap_flush_lock
);
3376 mdsc
->cap_flush_seq
= 0;
3377 INIT_LIST_HEAD(&mdsc
->cap_dirty
);
3378 INIT_LIST_HEAD(&mdsc
->cap_dirty_migrating
);
3379 mdsc
->num_cap_flushing
= 0;
3380 spin_lock_init(&mdsc
->cap_dirty_lock
);
3381 init_waitqueue_head(&mdsc
->cap_flushing_wq
);
3382 spin_lock_init(&mdsc
->dentry_lru_lock
);
3383 INIT_LIST_HEAD(&mdsc
->dentry_lru
);
3385 ceph_caps_init(mdsc
);
3386 ceph_adjust_min_caps(mdsc
, fsc
->min_caps
);
3392 * Wait for safe replies on open mds requests. If we time out, drop
3393 * all requests from the tree to avoid dangling dentry refs.
3395 static void wait_requests(struct ceph_mds_client
*mdsc
)
3397 struct ceph_mds_request
*req
;
3398 struct ceph_fs_client
*fsc
= mdsc
->fsc
;
3400 mutex_lock(&mdsc
->mutex
);
3401 if (__get_oldest_req(mdsc
)) {
3402 mutex_unlock(&mdsc
->mutex
);
3404 dout("wait_requests waiting for requests\n");
3405 wait_for_completion_timeout(&mdsc
->safe_umount_waiters
,
3406 fsc
->client
->options
->mount_timeout
* HZ
);
3408 /* tear down remaining requests */
3409 mutex_lock(&mdsc
->mutex
);
3410 while ((req
= __get_oldest_req(mdsc
))) {
3411 dout("wait_requests timed out on tid %llu\n",
3413 __unregister_request(mdsc
, req
);
3416 mutex_unlock(&mdsc
->mutex
);
3417 dout("wait_requests done\n");
3421 * called before mount is ro, and before dentries are torn down.
3422 * (hmm, does this still race with new lookups?)
3424 void ceph_mdsc_pre_umount(struct ceph_mds_client
*mdsc
)
3426 dout("pre_umount\n");
3430 ceph_flush_dirty_caps(mdsc
);
3431 wait_requests(mdsc
);
3434 * wait for reply handlers to drop their request refs and
3435 * their inode/dcache refs
3441 * wait for all write mds requests to flush.
3443 static void wait_unsafe_requests(struct ceph_mds_client
*mdsc
, u64 want_tid
)
3445 struct ceph_mds_request
*req
= NULL
, *nextreq
;
3448 mutex_lock(&mdsc
->mutex
);
3449 dout("wait_unsafe_requests want %lld\n", want_tid
);
3451 req
= __get_oldest_req(mdsc
);
3452 while (req
&& req
->r_tid
<= want_tid
) {
3453 /* find next request */
3454 n
= rb_next(&req
->r_node
);
3456 nextreq
= rb_entry(n
, struct ceph_mds_request
, r_node
);
3459 if ((req
->r_op
& CEPH_MDS_OP_WRITE
)) {
3461 ceph_mdsc_get_request(req
);
3463 ceph_mdsc_get_request(nextreq
);
3464 mutex_unlock(&mdsc
->mutex
);
3465 dout("wait_unsafe_requests wait on %llu (want %llu)\n",
3466 req
->r_tid
, want_tid
);
3467 wait_for_completion(&req
->r_safe_completion
);
3468 mutex_lock(&mdsc
->mutex
);
3469 ceph_mdsc_put_request(req
);
3471 break; /* next dne before, so we're done! */
3472 if (RB_EMPTY_NODE(&nextreq
->r_node
)) {
3473 /* next request was removed from tree */
3474 ceph_mdsc_put_request(nextreq
);
3477 ceph_mdsc_put_request(nextreq
); /* won't go away */
3481 mutex_unlock(&mdsc
->mutex
);
3482 dout("wait_unsafe_requests done\n");
3485 void ceph_mdsc_sync(struct ceph_mds_client
*mdsc
)
3487 u64 want_tid
, want_flush
;
3489 if (mdsc
->fsc
->mount_state
== CEPH_MOUNT_SHUTDOWN
)
3493 mutex_lock(&mdsc
->mutex
);
3494 want_tid
= mdsc
->last_tid
;
3495 mutex_unlock(&mdsc
->mutex
);
3497 ceph_flush_dirty_caps(mdsc
);
3498 spin_lock(&mdsc
->cap_dirty_lock
);
3499 want_flush
= mdsc
->cap_flush_seq
;
3500 spin_unlock(&mdsc
->cap_dirty_lock
);
3502 dout("sync want tid %lld flush_seq %lld\n", want_tid
, want_flush
);
3504 wait_unsafe_requests(mdsc
, want_tid
);
3505 wait_caps_flush(mdsc
, want_flush
);
3509 * true if all sessions are closed, or we force unmount
3511 static bool done_closing_sessions(struct ceph_mds_client
*mdsc
)
3513 if (mdsc
->fsc
->mount_state
== CEPH_MOUNT_SHUTDOWN
)
3515 return atomic_read(&mdsc
->num_sessions
) == 0;
3519 * called after sb is ro.
3521 void ceph_mdsc_close_sessions(struct ceph_mds_client
*mdsc
)
3523 struct ceph_mds_session
*session
;
3525 struct ceph_fs_client
*fsc
= mdsc
->fsc
;
3526 unsigned long timeout
= fsc
->client
->options
->mount_timeout
* HZ
;
3528 dout("close_sessions\n");
3530 /* close sessions */
3531 mutex_lock(&mdsc
->mutex
);
3532 for (i
= 0; i
< mdsc
->max_sessions
; i
++) {
3533 session
= __ceph_lookup_mds_session(mdsc
, i
);
3536 mutex_unlock(&mdsc
->mutex
);
3537 mutex_lock(&session
->s_mutex
);
3538 __close_session(mdsc
, session
);
3539 mutex_unlock(&session
->s_mutex
);
3540 ceph_put_mds_session(session
);
3541 mutex_lock(&mdsc
->mutex
);
3543 mutex_unlock(&mdsc
->mutex
);
3545 dout("waiting for sessions to close\n");
3546 wait_event_timeout(mdsc
->session_close_wq
, done_closing_sessions(mdsc
),
3549 /* tear down remaining sessions */
3550 mutex_lock(&mdsc
->mutex
);
3551 for (i
= 0; i
< mdsc
->max_sessions
; i
++) {
3552 if (mdsc
->sessions
[i
]) {
3553 session
= get_session(mdsc
->sessions
[i
]);
3554 __unregister_session(mdsc
, session
);
3555 mutex_unlock(&mdsc
->mutex
);
3556 mutex_lock(&session
->s_mutex
);
3557 remove_session_caps(session
);
3558 mutex_unlock(&session
->s_mutex
);
3559 ceph_put_mds_session(session
);
3560 mutex_lock(&mdsc
->mutex
);
3563 WARN_ON(!list_empty(&mdsc
->cap_delay_list
));
3564 mutex_unlock(&mdsc
->mutex
);
3566 ceph_cleanup_empty_realms(mdsc
);
3568 cancel_delayed_work_sync(&mdsc
->delayed_work
); /* cancel timer */
3573 static void ceph_mdsc_stop(struct ceph_mds_client
*mdsc
)
3576 cancel_delayed_work_sync(&mdsc
->delayed_work
); /* cancel timer */
3578 ceph_mdsmap_destroy(mdsc
->mdsmap
);
3579 kfree(mdsc
->sessions
);
3580 ceph_caps_finalize(mdsc
);
3583 void ceph_mdsc_destroy(struct ceph_fs_client
*fsc
)
3585 struct ceph_mds_client
*mdsc
= fsc
->mdsc
;
3587 dout("mdsc_destroy %p\n", mdsc
);
3588 ceph_mdsc_stop(mdsc
);
3590 /* flush out any connection work with references to us */
3595 dout("mdsc_destroy %p done\n", mdsc
);
3600 * handle mds map update.
3602 void ceph_mdsc_handle_map(struct ceph_mds_client
*mdsc
, struct ceph_msg
*msg
)
3606 void *p
= msg
->front
.iov_base
;
3607 void *end
= p
+ msg
->front
.iov_len
;
3608 struct ceph_mdsmap
*newmap
, *oldmap
;
3609 struct ceph_fsid fsid
;
3612 ceph_decode_need(&p
, end
, sizeof(fsid
)+2*sizeof(u32
), bad
);
3613 ceph_decode_copy(&p
, &fsid
, sizeof(fsid
));
3614 if (ceph_check_fsid(mdsc
->fsc
->client
, &fsid
) < 0)
3616 epoch
= ceph_decode_32(&p
);
3617 maplen
= ceph_decode_32(&p
);
3618 dout("handle_map epoch %u len %d\n", epoch
, (int)maplen
);
3620 /* do we need it? */
3621 ceph_monc_got_mdsmap(&mdsc
->fsc
->client
->monc
, epoch
);
3622 mutex_lock(&mdsc
->mutex
);
3623 if (mdsc
->mdsmap
&& epoch
<= mdsc
->mdsmap
->m_epoch
) {
3624 dout("handle_map epoch %u <= our %u\n",
3625 epoch
, mdsc
->mdsmap
->m_epoch
);
3626 mutex_unlock(&mdsc
->mutex
);
3630 newmap
= ceph_mdsmap_decode(&p
, end
);
3631 if (IS_ERR(newmap
)) {
3632 err
= PTR_ERR(newmap
);
3636 /* swap into place */
3638 oldmap
= mdsc
->mdsmap
;
3639 mdsc
->mdsmap
= newmap
;
3640 check_new_map(mdsc
, newmap
, oldmap
);
3641 ceph_mdsmap_destroy(oldmap
);
3643 mdsc
->mdsmap
= newmap
; /* first mds map */
3645 mdsc
->fsc
->sb
->s_maxbytes
= mdsc
->mdsmap
->m_max_file_size
;
3647 __wake_requests(mdsc
, &mdsc
->waiting_for_map
);
3649 mutex_unlock(&mdsc
->mutex
);
3650 schedule_delayed(mdsc
);
3654 mutex_unlock(&mdsc
->mutex
);
3656 pr_err("error decoding mdsmap %d\n", err
);
3660 static struct ceph_connection
*con_get(struct ceph_connection
*con
)
3662 struct ceph_mds_session
*s
= con
->private;
3664 if (get_session(s
)) {
3665 dout("mdsc con_get %p ok (%d)\n", s
, atomic_read(&s
->s_ref
));
3668 dout("mdsc con_get %p FAIL\n", s
);
3672 static void con_put(struct ceph_connection
*con
)
3674 struct ceph_mds_session
*s
= con
->private;
3676 dout("mdsc con_put %p (%d)\n", s
, atomic_read(&s
->s_ref
) - 1);
3677 ceph_put_mds_session(s
);
3681 * if the client is unresponsive for long enough, the mds will kill
3682 * the session entirely.
3684 static void peer_reset(struct ceph_connection
*con
)
3686 struct ceph_mds_session
*s
= con
->private;
3687 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
3689 pr_warn("mds%d closed our session\n", s
->s_mds
);
3690 send_mds_reconnect(mdsc
, s
);
3693 static void dispatch(struct ceph_connection
*con
, struct ceph_msg
*msg
)
3695 struct ceph_mds_session
*s
= con
->private;
3696 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
3697 int type
= le16_to_cpu(msg
->hdr
.type
);
3699 mutex_lock(&mdsc
->mutex
);
3700 if (__verify_registered_session(mdsc
, s
) < 0) {
3701 mutex_unlock(&mdsc
->mutex
);
3704 mutex_unlock(&mdsc
->mutex
);
3707 case CEPH_MSG_MDS_MAP
:
3708 ceph_mdsc_handle_map(mdsc
, msg
);
3710 case CEPH_MSG_CLIENT_SESSION
:
3711 handle_session(s
, msg
);
3713 case CEPH_MSG_CLIENT_REPLY
:
3714 handle_reply(s
, msg
);
3716 case CEPH_MSG_CLIENT_REQUEST_FORWARD
:
3717 handle_forward(mdsc
, s
, msg
);
3719 case CEPH_MSG_CLIENT_CAPS
:
3720 ceph_handle_caps(s
, msg
);
3722 case CEPH_MSG_CLIENT_SNAP
:
3723 ceph_handle_snap(mdsc
, s
, msg
);
3725 case CEPH_MSG_CLIENT_LEASE
:
3726 handle_lease(mdsc
, s
, msg
);
3730 pr_err("received unknown message type %d %s\n", type
,
3731 ceph_msg_type_name(type
));
3742 * Note: returned pointer is the address of a structure that's
3743 * managed separately. Caller must *not* attempt to free it.
3745 static struct ceph_auth_handshake
*get_authorizer(struct ceph_connection
*con
,
3746 int *proto
, int force_new
)
3748 struct ceph_mds_session
*s
= con
->private;
3749 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
3750 struct ceph_auth_client
*ac
= mdsc
->fsc
->client
->monc
.auth
;
3751 struct ceph_auth_handshake
*auth
= &s
->s_auth
;
3753 if (force_new
&& auth
->authorizer
) {
3754 ceph_auth_destroy_authorizer(ac
, auth
->authorizer
);
3755 auth
->authorizer
= NULL
;
3757 if (!auth
->authorizer
) {
3758 int ret
= ceph_auth_create_authorizer(ac
, CEPH_ENTITY_TYPE_MDS
,
3761 return ERR_PTR(ret
);
3763 int ret
= ceph_auth_update_authorizer(ac
, CEPH_ENTITY_TYPE_MDS
,
3766 return ERR_PTR(ret
);
3768 *proto
= ac
->protocol
;
3774 static int verify_authorizer_reply(struct ceph_connection
*con
, int len
)
3776 struct ceph_mds_session
*s
= con
->private;
3777 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
3778 struct ceph_auth_client
*ac
= mdsc
->fsc
->client
->monc
.auth
;
3780 return ceph_auth_verify_authorizer_reply(ac
, s
->s_auth
.authorizer
, len
);
3783 static int invalidate_authorizer(struct ceph_connection
*con
)
3785 struct ceph_mds_session
*s
= con
->private;
3786 struct ceph_mds_client
*mdsc
= s
->s_mdsc
;
3787 struct ceph_auth_client
*ac
= mdsc
->fsc
->client
->monc
.auth
;
3789 ceph_auth_invalidate_authorizer(ac
, CEPH_ENTITY_TYPE_MDS
);
3791 return ceph_monc_validate_auth(&mdsc
->fsc
->client
->monc
);
3794 static struct ceph_msg
*mds_alloc_msg(struct ceph_connection
*con
,
3795 struct ceph_msg_header
*hdr
, int *skip
)
3797 struct ceph_msg
*msg
;
3798 int type
= (int) le16_to_cpu(hdr
->type
);
3799 int front_len
= (int) le32_to_cpu(hdr
->front_len
);
3805 msg
= ceph_msg_new(type
, front_len
, GFP_NOFS
, false);
3807 pr_err("unable to allocate msg type %d len %d\n",
3815 static int sign_message(struct ceph_connection
*con
, struct ceph_msg
*msg
)
3817 struct ceph_mds_session
*s
= con
->private;
3818 struct ceph_auth_handshake
*auth
= &s
->s_auth
;
3819 return ceph_auth_sign_message(auth
, msg
);
3822 static int check_message_signature(struct ceph_connection
*con
, struct ceph_msg
*msg
)
3824 struct ceph_mds_session
*s
= con
->private;
3825 struct ceph_auth_handshake
*auth
= &s
->s_auth
;
3826 return ceph_auth_check_message_signature(auth
, msg
);
3829 static const struct ceph_connection_operations mds_con_ops
= {
3832 .dispatch
= dispatch
,
3833 .get_authorizer
= get_authorizer
,
3834 .verify_authorizer_reply
= verify_authorizer_reply
,
3835 .invalidate_authorizer
= invalidate_authorizer
,
3836 .peer_reset
= peer_reset
,
3837 .alloc_msg
= mds_alloc_msg
,
3838 .sign_message
= sign_message
,
3839 .check_message_signature
= check_message_signature
,