1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Copyright (C) 2004 Oracle. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public
19 * License along with this program; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 021110-1307, USA.
28 #include <linux/kref.h>
30 #define DLM_HB_NODE_DOWN_PRI (0xf000000)
31 #define DLM_HB_NODE_UP_PRI (0x8000000)
33 #define DLM_LOCKID_NAME_MAX 32
35 #define DLM_DOMAIN_NAME_MAX_LEN 255
36 #define DLM_LOCK_RES_OWNER_UNKNOWN O2NM_MAX_NODES
37 #define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes
38 #define DLM_THREAD_MS 200 // flush at least every 200 ms
40 #define DLM_HASH_BUCKETS (PAGE_SIZE / sizeof(struct hlist_head))
42 /* Intended to make it easier for us to switch out hash functions */
43 #define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
52 #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
53 LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
54 LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
56 #define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
57 #define DLM_RECOVERY_LOCK_NAME_LEN 9
59 static inline int dlm_is_recovery_lock(const char *lock_name
, int name_len
)
61 if (name_len
== DLM_RECOVERY_LOCK_NAME_LEN
&&
62 memcmp(lock_name
, DLM_RECOVERY_LOCK_NAME
, name_len
)==0)
67 #define DLM_RECO_STATE_ACTIVE 0x0001
69 struct dlm_recovery_ctxt
71 struct list_head resources
;
72 struct list_head received
;
73 struct list_head node_data
;
77 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
78 wait_queue_head_t event
;
90 struct list_head list
;
91 struct hlist_head
*lockres_hash
;
92 struct list_head dirty_list
;
93 struct list_head purge_list
;
94 struct list_head pending_asts
;
95 struct list_head pending_basts
;
96 unsigned int purge_count
;
103 wait_queue_head_t dlm_join_events
;
104 unsigned long live_nodes_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
105 unsigned long domain_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
106 unsigned long recovery_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
107 struct dlm_recovery_ctxt reco
;
108 spinlock_t master_lock
;
109 struct list_head master_list
;
110 struct list_head mle_hb_events
;
112 /* these give a really vague idea of the system load */
113 atomic_t local_resources
;
114 atomic_t remote_resources
;
115 atomic_t unknown_resources
;
117 /* NOTE: Next three are protected by dlm_domain_lock */
118 struct kref dlm_refs
;
119 enum dlm_ctxt_state dlm_state
;
120 unsigned int num_joins
;
122 struct o2hb_callback_func dlm_hb_up
;
123 struct o2hb_callback_func dlm_hb_down
;
124 struct task_struct
*dlm_thread_task
;
125 struct task_struct
*dlm_reco_thread_task
;
126 wait_queue_head_t dlm_thread_wq
;
127 wait_queue_head_t dlm_reco_thread_wq
;
128 wait_queue_head_t ast_wq
;
129 wait_queue_head_t migration_wq
;
131 struct work_struct dispatched_work
;
132 struct list_head work_list
;
133 spinlock_t work_lock
;
134 struct list_head dlm_domain_handlers
;
135 struct list_head dlm_eviction_callbacks
;
138 /* these keventd work queue items are for less-frequently
139 * called functions that cannot be directly called from the
140 * net message handlers for some reason, usually because
141 * they need to send net messages of their own. */
142 void dlm_dispatch_work(void *data
);
144 struct dlm_lock_resource
;
145 struct dlm_work_item
;
147 typedef void (dlm_workfunc_t
)(struct dlm_work_item
*, void *);
149 struct dlm_request_all_locks_priv
155 struct dlm_mig_lockres_priv
157 struct dlm_lock_resource
*lockres
;
161 struct dlm_assert_master_priv
163 struct dlm_lock_resource
*lockres
;
166 unsigned ignore_higher
:1;
172 struct list_head list
;
173 dlm_workfunc_t
*func
;
174 struct dlm_ctxt
*dlm
;
177 struct dlm_request_all_locks_priv ral
;
178 struct dlm_mig_lockres_priv ml
;
179 struct dlm_assert_master_priv am
;
183 static inline void dlm_init_work_item(struct dlm_ctxt
*dlm
,
184 struct dlm_work_item
*i
,
185 dlm_workfunc_t
*f
, void *data
)
187 memset(i
, 0, sizeof(*i
));
189 INIT_LIST_HEAD(&i
->list
);
191 i
->dlm
= dlm
; /* must have already done a dlm_grab on this! */
196 static inline void __dlm_set_joining_node(struct dlm_ctxt
*dlm
,
199 assert_spin_locked(&dlm
->spinlock
);
201 dlm
->joining_node
= node
;
202 wake_up(&dlm
->dlm_join_events
);
205 #define DLM_LOCK_RES_UNINITED 0x00000001
206 #define DLM_LOCK_RES_RECOVERING 0x00000002
207 #define DLM_LOCK_RES_READY 0x00000004
208 #define DLM_LOCK_RES_DIRTY 0x00000008
209 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010
210 #define DLM_LOCK_RES_MIGRATING 0x00000020
212 /* max milliseconds to wait to sync up a network failure with a node death */
213 #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
215 #define DLM_PURGE_INTERVAL_MS (8 * 1000)
217 struct dlm_lock_resource
219 /* WARNING: Please see the comment in dlm_init_lockres before
220 * adding fields here. */
221 struct hlist_node hash_node
;
222 struct qstr lockname
;
225 /* please keep these next 3 in this order
226 * some funcs want to iterate over all lists */
227 struct list_head granted
;
228 struct list_head converting
;
229 struct list_head blocked
;
231 struct list_head dirty
;
232 struct list_head recovering
; // dlm_recovery_ctxt.resources list
234 /* unused lock resources have their last_used stamped and are
235 * put on a list for the dlm thread to run. */
236 struct list_head purge
;
237 unsigned long last_used
;
239 unsigned migration_pending
:1;
240 atomic_t asts_reserved
;
242 wait_queue_head_t wq
;
243 u8 owner
; //node which owns the lock resource, or unknown
245 char lvb
[DLM_LVB_LEN
];
248 struct dlm_migratable_lock
252 /* these 3 are just padding for the in-memory structure, but
253 * list and flags are actually used when sent over the wire */
255 u8 list
; // 0=granted, 1=converting, 2=blocked
266 struct dlm_migratable_lock ml
;
268 struct list_head list
;
269 struct list_head ast_list
;
270 struct list_head bast_list
;
271 struct dlm_lock_resource
*lockres
;
273 struct kref lock_refs
;
275 // ast and bast must be callable while holding a spinlock!
276 dlm_astlockfunc_t
*ast
;
277 dlm_bastlockfunc_t
*bast
;
279 struct dlm_lockstatus
*lksb
;
280 unsigned ast_pending
:1,
286 lksb_kernel_allocated
:1;
290 #define DLM_LKSB_UNUSED1 0x01
291 #define DLM_LKSB_PUT_LVB 0x02
292 #define DLM_LKSB_GET_LVB 0x04
293 #define DLM_LKSB_UNUSED2 0x08
294 #define DLM_LKSB_UNUSED3 0x10
295 #define DLM_LKSB_UNUSED4 0x20
296 #define DLM_LKSB_UNUSED5 0x40
297 #define DLM_LKSB_UNUSED6 0x80
300 enum dlm_lockres_list
{
301 DLM_GRANTED_LIST
= 0,
306 static inline struct list_head
*
307 dlm_list_idx_to_ptr(struct dlm_lock_resource
*res
, enum dlm_lockres_list idx
)
309 struct list_head
*ret
= NULL
;
310 if (idx
== DLM_GRANTED_LIST
)
312 else if (idx
== DLM_CONVERTING_LIST
)
313 ret
= &res
->converting
;
314 else if (idx
== DLM_BLOCKED_LIST
)
326 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
332 DLM_MASTER_REQUEST_MSG
= 500,
333 DLM_UNUSED_MSG1
, /* 501 */
334 DLM_ASSERT_MASTER_MSG
, /* 502 */
335 DLM_CREATE_LOCK_MSG
, /* 503 */
336 DLM_CONVERT_LOCK_MSG
, /* 504 */
337 DLM_PROXY_AST_MSG
, /* 505 */
338 DLM_UNLOCK_LOCK_MSG
, /* 506 */
339 DLM_UNUSED_MSG2
, /* 507 */
340 DLM_MIGRATE_REQUEST_MSG
, /* 508 */
341 DLM_MIG_LOCKRES_MSG
, /* 509 */
342 DLM_QUERY_JOIN_MSG
, /* 510 */
343 DLM_ASSERT_JOINED_MSG
, /* 511 */
344 DLM_CANCEL_JOIN_MSG
, /* 512 */
345 DLM_EXIT_DOMAIN_MSG
, /* 513 */
346 DLM_MASTER_REQUERY_MSG
, /* 514 */
347 DLM_LOCK_REQUEST_MSG
, /* 515 */
348 DLM_RECO_DATA_DONE_MSG
, /* 516 */
349 DLM_BEGIN_RECO_MSG
, /* 517 */
350 DLM_FINALIZE_RECO_MSG
/* 518 */
353 struct dlm_reco_node_data
357 struct list_head list
;
361 DLM_RECO_NODE_DATA_DEAD
= -1,
362 DLM_RECO_NODE_DATA_INIT
= 0,
363 DLM_RECO_NODE_DATA_REQUESTING
,
364 DLM_RECO_NODE_DATA_REQUESTED
,
365 DLM_RECO_NODE_DATA_RECEIVING
,
366 DLM_RECO_NODE_DATA_DONE
,
367 DLM_RECO_NODE_DATA_FINALIZE_SENT
,
372 DLM_MASTER_RESP_NO
= 0,
374 DLM_MASTER_RESP_MAYBE
,
375 DLM_MASTER_RESP_ERROR
379 struct dlm_master_request
386 u8 name
[O2NM_MAX_NAME_LEN
];
389 #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
390 #define DLM_ASSERT_MASTER_REQUERY 0x00000002
391 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
392 struct dlm_assert_master
399 u8 name
[O2NM_MAX_NAME_LEN
];
402 struct dlm_migrate_request
409 u8 name
[O2NM_MAX_NAME_LEN
];
412 struct dlm_master_requery
419 u8 name
[O2NM_MAX_NAME_LEN
];
422 #define DLM_MRES_RECOVERY 0x01
423 #define DLM_MRES_MIGRATION 0x02
424 #define DLM_MRES_ALL_DONE 0x04
427 * We would like to get one whole lockres into a single network
428 * message whenever possible. Generally speaking, there will be
429 * at most one dlm_lock on a lockres for each node in the cluster,
430 * plus (infrequently) any additional locks coming in from userdlm.
432 * struct _dlm_lockres_page
434 * dlm_migratable_lockres mres;
435 * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
436 * u8 pad[DLM_MIG_LOCKRES_RESERVED];
439 * from ../cluster/tcp.h
440 * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
441 * (roughly 4080 bytes)
442 * and sizeof(dlm_migratable_lockres) = 112 bytes
443 * and sizeof(dlm_migratable_lock) = 16 bytes
445 * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
446 * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
448 * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
449 * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
450 * NET_MAX_PAYLOAD_BYTES
451 * (240 * 16) + 112 + 128 = 4080
453 * So a lockres would need more than 240 locks before it would
454 * use more than one network packet to recover. Not too bad.
456 #define DLM_MAX_MIGRATABLE_LOCKS 240
458 struct dlm_migratable_lockres
462 u8 num_locks
; // locks sent in this structure
464 __be32 total_locks
; // locks to be sent for this migration cookie
465 __be64 mig_cookie
; // cookie for this lockres migration
466 // or zero if not needed
468 u8 lockname
[DLM_LOCKID_NAME_MAX
];
472 struct dlm_migratable_lock ml
[0]; // 16 bytes each, begins at byte 112
474 #define DLM_MIG_LOCKRES_MAX_LEN \
475 (sizeof(struct dlm_migratable_lockres) + \
476 (sizeof(struct dlm_migratable_lock) * \
477 DLM_MAX_MIGRATABLE_LOCKS) )
479 /* from above, 128 bytes
480 * for some undetermined future use */
481 #define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
482 DLM_MIG_LOCKRES_MAX_LEN)
484 struct dlm_create_lock
494 u8 name
[O2NM_MAX_NAME_LEN
];
497 struct dlm_convert_lock
507 u8 name
[O2NM_MAX_NAME_LEN
];
511 #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
513 struct dlm_unlock_lock
522 u8 name
[O2NM_MAX_NAME_LEN
];
526 #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
538 u8 name
[O2NM_MAX_NAME_LEN
];
542 #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
544 #define DLM_MOD_KEY (0x666c6172)
545 enum dlm_query_join_response
{
551 struct dlm_lock_request
559 struct dlm_reco_data_done
567 /* eventually we can use this to attempt
568 * lvb recovery based on each node's info */
569 u8 reco_lvb
[DLM_LVB_LEN
];
572 struct dlm_begin_reco
581 struct dlm_query_join_request
586 u8 domain
[O2NM_MAX_NAME_LEN
];
589 struct dlm_assert_joined
594 u8 domain
[O2NM_MAX_NAME_LEN
];
597 struct dlm_cancel_join
602 u8 domain
[O2NM_MAX_NAME_LEN
];
605 struct dlm_exit_domain
611 struct dlm_finalize_reco
619 static inline enum dlm_status
620 __dlm_lockres_state_to_status(struct dlm_lock_resource
*res
)
622 enum dlm_status status
= DLM_NORMAL
;
624 assert_spin_locked(&res
->spinlock
);
626 if (res
->state
& DLM_LOCK_RES_RECOVERING
)
627 status
= DLM_RECOVERING
;
628 else if (res
->state
& DLM_LOCK_RES_MIGRATING
)
629 status
= DLM_MIGRATING
;
630 else if (res
->state
& DLM_LOCK_RES_IN_PROGRESS
)
631 status
= DLM_FORWARD
;
636 static inline u8
dlm_get_lock_cookie_node(u64 cookie
)
640 ret
= (u8
)(cookie
& 0xffULL
);
644 static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie
)
646 unsigned long long ret
;
647 ret
= ((unsigned long long)cookie
) & 0x00ffffffffffffffULL
;
651 struct dlm_lock
* dlm_new_lock(int type
, u8 node
, u64 cookie
,
652 struct dlm_lockstatus
*lksb
);
653 void dlm_lock_get(struct dlm_lock
*lock
);
654 void dlm_lock_put(struct dlm_lock
*lock
);
656 void dlm_lock_attach_lockres(struct dlm_lock
*lock
,
657 struct dlm_lock_resource
*res
);
659 int dlm_create_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
660 int dlm_convert_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
661 int dlm_proxy_ast_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
663 void dlm_revert_pending_convert(struct dlm_lock_resource
*res
,
664 struct dlm_lock
*lock
);
665 void dlm_revert_pending_lock(struct dlm_lock_resource
*res
,
666 struct dlm_lock
*lock
);
668 int dlm_unlock_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
669 void dlm_commit_pending_cancel(struct dlm_lock_resource
*res
,
670 struct dlm_lock
*lock
);
671 void dlm_commit_pending_unlock(struct dlm_lock_resource
*res
,
672 struct dlm_lock
*lock
);
674 int dlm_launch_thread(struct dlm_ctxt
*dlm
);
675 void dlm_complete_thread(struct dlm_ctxt
*dlm
);
676 int dlm_launch_recovery_thread(struct dlm_ctxt
*dlm
);
677 void dlm_complete_recovery_thread(struct dlm_ctxt
*dlm
);
678 void dlm_wait_for_recovery(struct dlm_ctxt
*dlm
);
679 void dlm_kick_recovery_thread(struct dlm_ctxt
*dlm
);
680 int dlm_is_node_dead(struct dlm_ctxt
*dlm
, u8 node
);
681 int dlm_wait_for_node_death(struct dlm_ctxt
*dlm
, u8 node
, int timeout
);
683 void dlm_put(struct dlm_ctxt
*dlm
);
684 struct dlm_ctxt
*dlm_grab(struct dlm_ctxt
*dlm
);
685 int dlm_domain_fully_joined(struct dlm_ctxt
*dlm
);
687 void __dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
688 struct dlm_lock_resource
*res
);
689 void dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
690 struct dlm_lock_resource
*res
);
691 void dlm_purge_lockres(struct dlm_ctxt
*dlm
,
692 struct dlm_lock_resource
*lockres
);
693 void dlm_lockres_get(struct dlm_lock_resource
*res
);
694 void dlm_lockres_put(struct dlm_lock_resource
*res
);
695 void __dlm_unhash_lockres(struct dlm_lock_resource
*res
);
696 void __dlm_insert_lockres(struct dlm_ctxt
*dlm
,
697 struct dlm_lock_resource
*res
);
698 struct dlm_lock_resource
* __dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
702 struct dlm_lock_resource
* dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
706 int dlm_is_host_down(int errno
);
707 void dlm_change_lockres_owner(struct dlm_ctxt
*dlm
,
708 struct dlm_lock_resource
*res
,
710 struct dlm_lock_resource
* dlm_get_lock_resource(struct dlm_ctxt
*dlm
,
713 struct dlm_lock_resource
*dlm_new_lockres(struct dlm_ctxt
*dlm
,
715 unsigned int namelen
);
717 void dlm_queue_ast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
718 void dlm_queue_bast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
719 void dlm_do_local_ast(struct dlm_ctxt
*dlm
,
720 struct dlm_lock_resource
*res
,
721 struct dlm_lock
*lock
);
722 int dlm_do_remote_ast(struct dlm_ctxt
*dlm
,
723 struct dlm_lock_resource
*res
,
724 struct dlm_lock
*lock
);
725 void dlm_do_local_bast(struct dlm_ctxt
*dlm
,
726 struct dlm_lock_resource
*res
,
727 struct dlm_lock
*lock
,
729 int dlm_send_proxy_ast_msg(struct dlm_ctxt
*dlm
,
730 struct dlm_lock_resource
*res
,
731 struct dlm_lock
*lock
,
733 int blocked_type
, int flags
);
734 static inline int dlm_send_proxy_bast(struct dlm_ctxt
*dlm
,
735 struct dlm_lock_resource
*res
,
736 struct dlm_lock
*lock
,
739 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_BAST
,
743 static inline int dlm_send_proxy_ast(struct dlm_ctxt
*dlm
,
744 struct dlm_lock_resource
*res
,
745 struct dlm_lock
*lock
,
748 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_AST
,
752 void dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
753 void __dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
755 u8
dlm_nm_this_node(struct dlm_ctxt
*dlm
);
756 void dlm_kick_thread(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
757 void __dlm_dirty_lockres(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
760 int dlm_nm_init(struct dlm_ctxt
*dlm
);
761 int dlm_heartbeat_init(struct dlm_ctxt
*dlm
);
762 void dlm_hb_node_down_cb(struct o2nm_node
*node
, int idx
, void *data
);
763 void dlm_hb_node_up_cb(struct o2nm_node
*node
, int idx
, void *data
);
765 int dlm_lockres_is_dirty(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
766 int dlm_migrate_lockres(struct dlm_ctxt
*dlm
,
767 struct dlm_lock_resource
*res
,
769 int dlm_finish_migration(struct dlm_ctxt
*dlm
,
770 struct dlm_lock_resource
*res
,
772 void dlm_lockres_release_ast(struct dlm_ctxt
*dlm
,
773 struct dlm_lock_resource
*res
);
774 void __dlm_lockres_reserve_ast(struct dlm_lock_resource
*res
);
776 int dlm_master_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
777 int dlm_assert_master_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
778 int dlm_migrate_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
779 int dlm_mig_lockres_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
780 int dlm_master_requery_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
781 int dlm_request_all_locks_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
782 int dlm_reco_data_done_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
783 int dlm_begin_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
784 int dlm_finalize_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
785 int dlm_do_master_requery(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
,
786 u8 nodenum
, u8
*real_master
);
787 int dlm_lockres_master_requery(struct dlm_ctxt
*dlm
,
788 struct dlm_lock_resource
*res
, u8
*real_master
);
791 int dlm_dispatch_assert_master(struct dlm_ctxt
*dlm
,
792 struct dlm_lock_resource
*res
,
798 int dlm_send_one_lockres(struct dlm_ctxt
*dlm
,
799 struct dlm_lock_resource
*res
,
800 struct dlm_migratable_lockres
*mres
,
803 void dlm_move_lockres_to_recovery_list(struct dlm_ctxt
*dlm
,
804 struct dlm_lock_resource
*res
);
806 /* will exit holding res->spinlock, but may drop in function */
807 void __dlm_wait_on_lockres_flags(struct dlm_lock_resource
*res
, int flags
);
808 void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource
*res
, int flags
);
810 /* will exit holding res->spinlock, but may drop in function */
811 static inline void __dlm_wait_on_lockres(struct dlm_lock_resource
*res
)
813 __dlm_wait_on_lockres_flags(res
, (DLM_LOCK_RES_IN_PROGRESS
|
814 DLM_LOCK_RES_RECOVERING
|
815 DLM_LOCK_RES_MIGRATING
));
819 int dlm_init_mle_cache(void);
820 void dlm_destroy_mle_cache(void);
821 void dlm_hb_event_notify_attached(struct dlm_ctxt
*dlm
, int idx
, int node_up
);
822 void dlm_clean_master_list(struct dlm_ctxt
*dlm
,
824 int dlm_lock_basts_flushed(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
827 static inline const char * dlm_lock_mode_name(int mode
)
841 static inline int dlm_lock_compatible(int existing
, int request
)
843 /* NO_LOCK compatible with all */
844 if (request
== LKM_NLMODE
||
845 existing
== LKM_NLMODE
)
848 /* EX incompatible with all non-NO_LOCK */
849 if (request
== LKM_EXMODE
)
852 /* request must be PR, which is compatible with PR */
853 if (existing
== LKM_PRMODE
)
859 static inline int dlm_lock_on_list(struct list_head
*head
,
860 struct dlm_lock
*lock
)
862 struct list_head
*iter
;
863 struct dlm_lock
*tmplock
;
865 list_for_each(iter
, head
) {
866 tmplock
= list_entry(iter
, struct dlm_lock
, list
);
874 static inline enum dlm_status
dlm_err_to_dlm_status(int err
)
879 else if (err
== -ETIMEDOUT
|| o2net_link_down(err
, NULL
))
881 else if (err
== -EINVAL
)
883 else if (err
== -ENAMETOOLONG
)
891 static inline void dlm_node_iter_init(unsigned long *map
,
892 struct dlm_node_iter
*iter
)
894 memcpy(iter
->node_map
, map
, sizeof(iter
->node_map
));
898 static inline int dlm_node_iter_next(struct dlm_node_iter
*iter
)
901 bit
= find_next_bit(iter
->node_map
, O2NM_MAX_NODES
, iter
->curnode
+1);
902 if (bit
>= O2NM_MAX_NODES
) {
903 iter
->curnode
= O2NM_MAX_NODES
;
912 #endif /* DLMCOMMON_H */