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_BITS 7
41 #define DLM_HASH_SIZE (1 << DLM_HASH_BITS)
42 #define DLM_HASH_MASK (DLM_HASH_SIZE - 1)
51 #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
52 LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
53 LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
55 #define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
56 #define DLM_RECOVERY_LOCK_NAME_LEN 9
58 static inline int dlm_is_recovery_lock(const char *lock_name
, int name_len
)
60 if (name_len
== DLM_RECOVERY_LOCK_NAME_LEN
&&
61 memcmp(lock_name
, DLM_RECOVERY_LOCK_NAME
, name_len
)==0)
66 #define DLM_RECO_STATE_ACTIVE 0x0001
68 struct dlm_recovery_ctxt
70 struct list_head resources
;
71 struct list_head received
;
72 struct list_head node_data
;
76 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
77 wait_queue_head_t event
;
89 struct list_head list
;
90 struct list_head
*resources
;
91 struct list_head dirty_list
;
92 struct list_head purge_list
;
93 struct list_head pending_asts
;
94 struct list_head pending_basts
;
95 unsigned int purge_count
;
102 wait_queue_head_t dlm_join_events
;
103 unsigned long live_nodes_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
104 unsigned long domain_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
105 unsigned long recovery_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
106 struct dlm_recovery_ctxt reco
;
107 spinlock_t master_lock
;
108 struct list_head master_list
;
109 struct list_head mle_hb_events
;
111 /* these give a really vague idea of the system load */
112 atomic_t local_resources
;
113 atomic_t remote_resources
;
114 atomic_t unknown_resources
;
116 /* NOTE: Next three are protected by dlm_domain_lock */
117 struct kref dlm_refs
;
118 enum dlm_ctxt_state dlm_state
;
119 unsigned int num_joins
;
121 struct o2hb_callback_func dlm_hb_up
;
122 struct o2hb_callback_func dlm_hb_down
;
123 struct task_struct
*dlm_thread_task
;
124 struct task_struct
*dlm_reco_thread_task
;
125 wait_queue_head_t dlm_thread_wq
;
126 wait_queue_head_t dlm_reco_thread_wq
;
127 wait_queue_head_t ast_wq
;
128 wait_queue_head_t migration_wq
;
130 struct work_struct dispatched_work
;
131 struct list_head work_list
;
132 spinlock_t work_lock
;
133 struct list_head dlm_domain_handlers
;
134 struct list_head dlm_eviction_callbacks
;
137 /* these keventd work queue items are for less-frequently
138 * called functions that cannot be directly called from the
139 * net message handlers for some reason, usually because
140 * they need to send net messages of their own. */
141 void dlm_dispatch_work(void *data
);
143 struct dlm_lock_resource
;
144 struct dlm_work_item
;
146 typedef void (dlm_workfunc_t
)(struct dlm_work_item
*, void *);
148 struct dlm_request_all_locks_priv
154 struct dlm_mig_lockres_priv
156 struct dlm_lock_resource
*lockres
;
160 struct dlm_assert_master_priv
162 struct dlm_lock_resource
*lockres
;
165 unsigned ignore_higher
:1;
171 struct list_head list
;
172 dlm_workfunc_t
*func
;
173 struct dlm_ctxt
*dlm
;
176 struct dlm_request_all_locks_priv ral
;
177 struct dlm_mig_lockres_priv ml
;
178 struct dlm_assert_master_priv am
;
182 static inline void dlm_init_work_item(struct dlm_ctxt
*dlm
,
183 struct dlm_work_item
*i
,
184 dlm_workfunc_t
*f
, void *data
)
186 memset(i
, 0, sizeof(*i
));
188 INIT_LIST_HEAD(&i
->list
);
190 i
->dlm
= dlm
; /* must have already done a dlm_grab on this! */
195 static inline void __dlm_set_joining_node(struct dlm_ctxt
*dlm
,
198 assert_spin_locked(&dlm
->spinlock
);
200 dlm
->joining_node
= node
;
201 wake_up(&dlm
->dlm_join_events
);
204 #define DLM_LOCK_RES_UNINITED 0x00000001
205 #define DLM_LOCK_RES_RECOVERING 0x00000002
206 #define DLM_LOCK_RES_READY 0x00000004
207 #define DLM_LOCK_RES_DIRTY 0x00000008
208 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010
209 #define DLM_LOCK_RES_MIGRATING 0x00000020
211 /* max milliseconds to wait to sync up a network failure with a node death */
212 #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
214 #define DLM_PURGE_INTERVAL_MS (8 * 1000)
216 struct dlm_lock_resource
218 /* WARNING: Please see the comment in dlm_init_lockres before
219 * adding fields here. */
220 struct list_head list
;
223 /* please keep these next 3 in this order
224 * some funcs want to iterate over all lists */
225 struct list_head granted
;
226 struct list_head converting
;
227 struct list_head blocked
;
229 struct list_head dirty
;
230 struct list_head recovering
; // dlm_recovery_ctxt.resources list
232 /* unused lock resources have their last_used stamped and are
233 * put on a list for the dlm thread to run. */
234 struct list_head purge
;
235 unsigned long last_used
;
237 unsigned migration_pending
:1;
238 atomic_t asts_reserved
;
240 wait_queue_head_t wq
;
241 u8 owner
; //node which owns the lock resource, or unknown
243 struct qstr lockname
;
244 char lvb
[DLM_LVB_LEN
];
247 struct dlm_migratable_lock
251 /* these 3 are just padding for the in-memory structure, but
252 * list and flags are actually used when sent over the wire */
254 u8 list
; // 0=granted, 1=converting, 2=blocked
265 struct dlm_migratable_lock ml
;
267 struct list_head list
;
268 struct list_head ast_list
;
269 struct list_head bast_list
;
270 struct dlm_lock_resource
*lockres
;
272 struct kref lock_refs
;
274 // ast and bast must be callable while holding a spinlock!
275 dlm_astlockfunc_t
*ast
;
276 dlm_bastlockfunc_t
*bast
;
278 struct dlm_lockstatus
*lksb
;
279 unsigned ast_pending
:1,
285 lksb_kernel_allocated
:1;
289 #define DLM_LKSB_UNUSED1 0x01
290 #define DLM_LKSB_PUT_LVB 0x02
291 #define DLM_LKSB_GET_LVB 0x04
292 #define DLM_LKSB_UNUSED2 0x08
293 #define DLM_LKSB_UNUSED3 0x10
294 #define DLM_LKSB_UNUSED4 0x20
295 #define DLM_LKSB_UNUSED5 0x40
296 #define DLM_LKSB_UNUSED6 0x80
299 enum dlm_lockres_list
{
300 DLM_GRANTED_LIST
= 0,
305 static inline struct list_head
*
306 dlm_list_idx_to_ptr(struct dlm_lock_resource
*res
, enum dlm_lockres_list idx
)
308 struct list_head
*ret
= NULL
;
309 if (idx
== DLM_GRANTED_LIST
)
311 else if (idx
== DLM_CONVERTING_LIST
)
312 ret
= &res
->converting
;
313 else if (idx
== DLM_BLOCKED_LIST
)
325 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
331 DLM_MASTER_REQUEST_MSG
= 500,
332 DLM_UNUSED_MSG1
, /* 501 */
333 DLM_ASSERT_MASTER_MSG
, /* 502 */
334 DLM_CREATE_LOCK_MSG
, /* 503 */
335 DLM_CONVERT_LOCK_MSG
, /* 504 */
336 DLM_PROXY_AST_MSG
, /* 505 */
337 DLM_UNLOCK_LOCK_MSG
, /* 506 */
338 DLM_UNUSED_MSG2
, /* 507 */
339 DLM_MIGRATE_REQUEST_MSG
, /* 508 */
340 DLM_MIG_LOCKRES_MSG
, /* 509 */
341 DLM_QUERY_JOIN_MSG
, /* 510 */
342 DLM_ASSERT_JOINED_MSG
, /* 511 */
343 DLM_CANCEL_JOIN_MSG
, /* 512 */
344 DLM_EXIT_DOMAIN_MSG
, /* 513 */
345 DLM_MASTER_REQUERY_MSG
, /* 514 */
346 DLM_LOCK_REQUEST_MSG
, /* 515 */
347 DLM_RECO_DATA_DONE_MSG
, /* 516 */
348 DLM_BEGIN_RECO_MSG
, /* 517 */
349 DLM_FINALIZE_RECO_MSG
/* 518 */
352 struct dlm_reco_node_data
356 struct list_head list
;
360 DLM_RECO_NODE_DATA_DEAD
= -1,
361 DLM_RECO_NODE_DATA_INIT
= 0,
362 DLM_RECO_NODE_DATA_REQUESTING
,
363 DLM_RECO_NODE_DATA_REQUESTED
,
364 DLM_RECO_NODE_DATA_RECEIVING
,
365 DLM_RECO_NODE_DATA_DONE
,
366 DLM_RECO_NODE_DATA_FINALIZE_SENT
,
371 DLM_MASTER_RESP_NO
= 0,
373 DLM_MASTER_RESP_MAYBE
,
374 DLM_MASTER_RESP_ERROR
378 struct dlm_master_request
385 u8 name
[O2NM_MAX_NAME_LEN
];
388 #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
389 #define DLM_ASSERT_MASTER_REQUERY 0x00000002
390 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
391 struct dlm_assert_master
398 u8 name
[O2NM_MAX_NAME_LEN
];
401 struct dlm_migrate_request
408 u8 name
[O2NM_MAX_NAME_LEN
];
411 struct dlm_master_requery
418 u8 name
[O2NM_MAX_NAME_LEN
];
421 #define DLM_MRES_RECOVERY 0x01
422 #define DLM_MRES_MIGRATION 0x02
423 #define DLM_MRES_ALL_DONE 0x04
426 * We would like to get one whole lockres into a single network
427 * message whenever possible. Generally speaking, there will be
428 * at most one dlm_lock on a lockres for each node in the cluster,
429 * plus (infrequently) any additional locks coming in from userdlm.
431 * struct _dlm_lockres_page
433 * dlm_migratable_lockres mres;
434 * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
435 * u8 pad[DLM_MIG_LOCKRES_RESERVED];
438 * from ../cluster/tcp.h
439 * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
440 * (roughly 4080 bytes)
441 * and sizeof(dlm_migratable_lockres) = 112 bytes
442 * and sizeof(dlm_migratable_lock) = 16 bytes
444 * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
445 * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
447 * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
448 * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
449 * NET_MAX_PAYLOAD_BYTES
450 * (240 * 16) + 112 + 128 = 4080
452 * So a lockres would need more than 240 locks before it would
453 * use more than one network packet to recover. Not too bad.
455 #define DLM_MAX_MIGRATABLE_LOCKS 240
457 struct dlm_migratable_lockres
461 u8 num_locks
; // locks sent in this structure
463 __be32 total_locks
; // locks to be sent for this migration cookie
464 __be64 mig_cookie
; // cookie for this lockres migration
465 // or zero if not needed
467 u8 lockname
[DLM_LOCKID_NAME_MAX
];
471 struct dlm_migratable_lock ml
[0]; // 16 bytes each, begins at byte 112
473 #define DLM_MIG_LOCKRES_MAX_LEN \
474 (sizeof(struct dlm_migratable_lockres) + \
475 (sizeof(struct dlm_migratable_lock) * \
476 DLM_MAX_MIGRATABLE_LOCKS) )
478 /* from above, 128 bytes
479 * for some undetermined future use */
480 #define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
481 DLM_MIG_LOCKRES_MAX_LEN)
483 struct dlm_create_lock
493 u8 name
[O2NM_MAX_NAME_LEN
];
496 struct dlm_convert_lock
506 u8 name
[O2NM_MAX_NAME_LEN
];
510 #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
512 struct dlm_unlock_lock
521 u8 name
[O2NM_MAX_NAME_LEN
];
525 #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
537 u8 name
[O2NM_MAX_NAME_LEN
];
541 #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
543 #define DLM_MOD_KEY (0x666c6172)
544 enum dlm_query_join_response
{
550 struct dlm_lock_request
558 struct dlm_reco_data_done
566 /* eventually we can use this to attempt
567 * lvb recovery based on each node's info */
568 u8 reco_lvb
[DLM_LVB_LEN
];
571 struct dlm_begin_reco
580 struct dlm_query_join_request
585 u8 domain
[O2NM_MAX_NAME_LEN
];
588 struct dlm_assert_joined
593 u8 domain
[O2NM_MAX_NAME_LEN
];
596 struct dlm_cancel_join
601 u8 domain
[O2NM_MAX_NAME_LEN
];
604 struct dlm_exit_domain
610 struct dlm_finalize_reco
618 static inline enum dlm_status
619 __dlm_lockres_state_to_status(struct dlm_lock_resource
*res
)
621 enum dlm_status status
= DLM_NORMAL
;
623 assert_spin_locked(&res
->spinlock
);
625 if (res
->state
& DLM_LOCK_RES_RECOVERING
)
626 status
= DLM_RECOVERING
;
627 else if (res
->state
& DLM_LOCK_RES_MIGRATING
)
628 status
= DLM_MIGRATING
;
629 else if (res
->state
& DLM_LOCK_RES_IN_PROGRESS
)
630 status
= DLM_FORWARD
;
635 struct dlm_lock
* dlm_new_lock(int type
, u8 node
, u64 cookie
,
636 struct dlm_lockstatus
*lksb
);
637 void dlm_lock_get(struct dlm_lock
*lock
);
638 void dlm_lock_put(struct dlm_lock
*lock
);
640 void dlm_lock_attach_lockres(struct dlm_lock
*lock
,
641 struct dlm_lock_resource
*res
);
643 int dlm_create_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
644 int dlm_convert_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
645 int dlm_proxy_ast_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
647 void dlm_revert_pending_convert(struct dlm_lock_resource
*res
,
648 struct dlm_lock
*lock
);
649 void dlm_revert_pending_lock(struct dlm_lock_resource
*res
,
650 struct dlm_lock
*lock
);
652 int dlm_unlock_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
653 void dlm_commit_pending_cancel(struct dlm_lock_resource
*res
,
654 struct dlm_lock
*lock
);
655 void dlm_commit_pending_unlock(struct dlm_lock_resource
*res
,
656 struct dlm_lock
*lock
);
658 int dlm_launch_thread(struct dlm_ctxt
*dlm
);
659 void dlm_complete_thread(struct dlm_ctxt
*dlm
);
660 int dlm_launch_recovery_thread(struct dlm_ctxt
*dlm
);
661 void dlm_complete_recovery_thread(struct dlm_ctxt
*dlm
);
662 void dlm_wait_for_recovery(struct dlm_ctxt
*dlm
);
663 int dlm_is_node_dead(struct dlm_ctxt
*dlm
, u8 node
);
664 int dlm_wait_for_node_death(struct dlm_ctxt
*dlm
, u8 node
, int timeout
);
666 void dlm_put(struct dlm_ctxt
*dlm
);
667 struct dlm_ctxt
*dlm_grab(struct dlm_ctxt
*dlm
);
668 int dlm_domain_fully_joined(struct dlm_ctxt
*dlm
);
670 void __dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
671 struct dlm_lock_resource
*res
);
672 void dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
673 struct dlm_lock_resource
*res
);
674 void dlm_purge_lockres(struct dlm_ctxt
*dlm
,
675 struct dlm_lock_resource
*lockres
);
676 void dlm_lockres_get(struct dlm_lock_resource
*res
);
677 void dlm_lockres_put(struct dlm_lock_resource
*res
);
678 void __dlm_unhash_lockres(struct dlm_lock_resource
*res
);
679 void __dlm_insert_lockres(struct dlm_ctxt
*dlm
,
680 struct dlm_lock_resource
*res
);
681 struct dlm_lock_resource
* __dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
684 struct dlm_lock_resource
* dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
688 int dlm_is_host_down(int errno
);
689 void dlm_change_lockres_owner(struct dlm_ctxt
*dlm
,
690 struct dlm_lock_resource
*res
,
692 struct dlm_lock_resource
* dlm_get_lock_resource(struct dlm_ctxt
*dlm
,
695 struct dlm_lock_resource
*dlm_new_lockres(struct dlm_ctxt
*dlm
,
697 unsigned int namelen
);
699 void dlm_queue_ast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
700 void dlm_queue_bast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
701 void dlm_do_local_ast(struct dlm_ctxt
*dlm
,
702 struct dlm_lock_resource
*res
,
703 struct dlm_lock
*lock
);
704 int dlm_do_remote_ast(struct dlm_ctxt
*dlm
,
705 struct dlm_lock_resource
*res
,
706 struct dlm_lock
*lock
);
707 void dlm_do_local_bast(struct dlm_ctxt
*dlm
,
708 struct dlm_lock_resource
*res
,
709 struct dlm_lock
*lock
,
711 int dlm_send_proxy_ast_msg(struct dlm_ctxt
*dlm
,
712 struct dlm_lock_resource
*res
,
713 struct dlm_lock
*lock
,
715 int blocked_type
, int flags
);
716 static inline int dlm_send_proxy_bast(struct dlm_ctxt
*dlm
,
717 struct dlm_lock_resource
*res
,
718 struct dlm_lock
*lock
,
721 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_BAST
,
725 static inline int dlm_send_proxy_ast(struct dlm_ctxt
*dlm
,
726 struct dlm_lock_resource
*res
,
727 struct dlm_lock
*lock
,
730 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_AST
,
734 void dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
735 void __dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
737 u8
dlm_nm_this_node(struct dlm_ctxt
*dlm
);
738 void dlm_kick_thread(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
739 void __dlm_dirty_lockres(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
742 int dlm_nm_init(struct dlm_ctxt
*dlm
);
743 int dlm_heartbeat_init(struct dlm_ctxt
*dlm
);
744 void dlm_hb_node_down_cb(struct o2nm_node
*node
, int idx
, void *data
);
745 void dlm_hb_node_up_cb(struct o2nm_node
*node
, int idx
, void *data
);
747 int dlm_lockres_is_dirty(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
748 int dlm_migrate_lockres(struct dlm_ctxt
*dlm
,
749 struct dlm_lock_resource
*res
,
751 int dlm_finish_migration(struct dlm_ctxt
*dlm
,
752 struct dlm_lock_resource
*res
,
754 void dlm_lockres_release_ast(struct dlm_ctxt
*dlm
,
755 struct dlm_lock_resource
*res
);
756 void __dlm_lockres_reserve_ast(struct dlm_lock_resource
*res
);
758 int dlm_master_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
759 int dlm_assert_master_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
760 int dlm_migrate_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
761 int dlm_mig_lockres_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
762 int dlm_master_requery_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
763 int dlm_request_all_locks_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
764 int dlm_reco_data_done_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
765 int dlm_begin_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
766 int dlm_finalize_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
768 int dlm_dispatch_assert_master(struct dlm_ctxt
*dlm
,
769 struct dlm_lock_resource
*res
,
775 int dlm_send_one_lockres(struct dlm_ctxt
*dlm
,
776 struct dlm_lock_resource
*res
,
777 struct dlm_migratable_lockres
*mres
,
780 void dlm_move_lockres_to_recovery_list(struct dlm_ctxt
*dlm
,
781 struct dlm_lock_resource
*res
);
783 /* will exit holding res->spinlock, but may drop in function */
784 void __dlm_wait_on_lockres_flags(struct dlm_lock_resource
*res
, int flags
);
785 void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource
*res
, int flags
);
787 /* will exit holding res->spinlock, but may drop in function */
788 static inline void __dlm_wait_on_lockres(struct dlm_lock_resource
*res
)
790 __dlm_wait_on_lockres_flags(res
, (DLM_LOCK_RES_IN_PROGRESS
|
791 DLM_LOCK_RES_RECOVERING
|
792 DLM_LOCK_RES_MIGRATING
));
796 int dlm_init_mle_cache(void);
797 void dlm_destroy_mle_cache(void);
798 void dlm_hb_event_notify_attached(struct dlm_ctxt
*dlm
, int idx
, int node_up
);
799 void dlm_clean_master_list(struct dlm_ctxt
*dlm
,
801 int dlm_lock_basts_flushed(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
804 static inline const char * dlm_lock_mode_name(int mode
)
818 static inline int dlm_lock_compatible(int existing
, int request
)
820 /* NO_LOCK compatible with all */
821 if (request
== LKM_NLMODE
||
822 existing
== LKM_NLMODE
)
825 /* EX incompatible with all non-NO_LOCK */
826 if (request
== LKM_EXMODE
)
829 /* request must be PR, which is compatible with PR */
830 if (existing
== LKM_PRMODE
)
836 static inline int dlm_lock_on_list(struct list_head
*head
,
837 struct dlm_lock
*lock
)
839 struct list_head
*iter
;
840 struct dlm_lock
*tmplock
;
842 list_for_each(iter
, head
) {
843 tmplock
= list_entry(iter
, struct dlm_lock
, list
);
851 static inline enum dlm_status
dlm_err_to_dlm_status(int err
)
856 else if (err
== -ETIMEDOUT
|| o2net_link_down(err
, NULL
))
858 else if (err
== -EINVAL
)
860 else if (err
== -ENAMETOOLONG
)
868 static inline void dlm_node_iter_init(unsigned long *map
,
869 struct dlm_node_iter
*iter
)
871 memcpy(iter
->node_map
, map
, sizeof(iter
->node_map
));
875 static inline int dlm_node_iter_next(struct dlm_node_iter
*iter
)
878 bit
= find_next_bit(iter
->node_map
, O2NM_MAX_NODES
, iter
->curnode
+1);
879 if (bit
>= O2NM_MAX_NODES
) {
880 iter
->curnode
= O2NM_MAX_NODES
;
889 #endif /* DLMCOMMON_H */