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_SIZE_DEFAULT (1 << 14)
41 #if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE
42 # define DLM_HASH_PAGES 1
44 # define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE)
46 #define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head))
47 #define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE)
49 /* Intended to make it easier for us to switch out hash functions */
50 #define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
59 #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
60 LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
61 LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
63 #define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
64 #define DLM_RECOVERY_LOCK_NAME_LEN 9
66 static inline int dlm_is_recovery_lock(const char *lock_name
, int name_len
)
68 if (name_len
== DLM_RECOVERY_LOCK_NAME_LEN
&&
69 memcmp(lock_name
, DLM_RECOVERY_LOCK_NAME
, name_len
)==0)
74 #define DLM_RECO_STATE_ACTIVE 0x0001
76 struct dlm_recovery_ctxt
78 struct list_head resources
;
79 struct list_head received
;
80 struct list_head node_data
;
84 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
85 wait_queue_head_t event
;
97 struct list_head list
;
98 struct hlist_head
**lockres_hash
;
99 struct list_head dirty_list
;
100 struct list_head purge_list
;
101 struct list_head pending_asts
;
102 struct list_head pending_basts
;
103 unsigned int purge_count
;
110 wait_queue_head_t dlm_join_events
;
111 unsigned long live_nodes_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
112 unsigned long domain_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
113 unsigned long recovery_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
114 struct dlm_recovery_ctxt reco
;
115 spinlock_t master_lock
;
116 struct list_head master_list
;
117 struct list_head mle_hb_events
;
119 /* these give a really vague idea of the system load */
120 atomic_t local_resources
;
121 atomic_t remote_resources
;
122 atomic_t unknown_resources
;
124 /* NOTE: Next three are protected by dlm_domain_lock */
125 struct kref dlm_refs
;
126 enum dlm_ctxt_state dlm_state
;
127 unsigned int num_joins
;
129 struct o2hb_callback_func dlm_hb_up
;
130 struct o2hb_callback_func dlm_hb_down
;
131 struct task_struct
*dlm_thread_task
;
132 struct task_struct
*dlm_reco_thread_task
;
133 wait_queue_head_t dlm_thread_wq
;
134 wait_queue_head_t dlm_reco_thread_wq
;
135 wait_queue_head_t ast_wq
;
136 wait_queue_head_t migration_wq
;
138 struct work_struct dispatched_work
;
139 struct list_head work_list
;
140 spinlock_t work_lock
;
141 struct list_head dlm_domain_handlers
;
142 struct list_head dlm_eviction_callbacks
;
145 static inline struct hlist_head
*dlm_lockres_hash(struct dlm_ctxt
*dlm
, unsigned i
)
147 return dlm
->lockres_hash
[(i
/ DLM_BUCKETS_PER_PAGE
) % DLM_HASH_PAGES
] + (i
% DLM_BUCKETS_PER_PAGE
);
150 /* these keventd work queue items are for less-frequently
151 * called functions that cannot be directly called from the
152 * net message handlers for some reason, usually because
153 * they need to send net messages of their own. */
154 void dlm_dispatch_work(void *data
);
156 struct dlm_lock_resource
;
157 struct dlm_work_item
;
159 typedef void (dlm_workfunc_t
)(struct dlm_work_item
*, void *);
161 struct dlm_request_all_locks_priv
167 struct dlm_mig_lockres_priv
169 struct dlm_lock_resource
*lockres
;
173 struct dlm_assert_master_priv
175 struct dlm_lock_resource
*lockres
;
178 unsigned ignore_higher
:1;
184 struct list_head list
;
185 dlm_workfunc_t
*func
;
186 struct dlm_ctxt
*dlm
;
189 struct dlm_request_all_locks_priv ral
;
190 struct dlm_mig_lockres_priv ml
;
191 struct dlm_assert_master_priv am
;
195 static inline void dlm_init_work_item(struct dlm_ctxt
*dlm
,
196 struct dlm_work_item
*i
,
197 dlm_workfunc_t
*f
, void *data
)
199 memset(i
, 0, sizeof(*i
));
201 INIT_LIST_HEAD(&i
->list
);
203 i
->dlm
= dlm
; /* must have already done a dlm_grab on this! */
208 static inline void __dlm_set_joining_node(struct dlm_ctxt
*dlm
,
211 assert_spin_locked(&dlm
->spinlock
);
213 dlm
->joining_node
= node
;
214 wake_up(&dlm
->dlm_join_events
);
217 #define DLM_LOCK_RES_UNINITED 0x00000001
218 #define DLM_LOCK_RES_RECOVERING 0x00000002
219 #define DLM_LOCK_RES_READY 0x00000004
220 #define DLM_LOCK_RES_DIRTY 0x00000008
221 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010
222 #define DLM_LOCK_RES_MIGRATING 0x00000020
224 /* max milliseconds to wait to sync up a network failure with a node death */
225 #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
227 #define DLM_PURGE_INTERVAL_MS (8 * 1000)
229 struct dlm_lock_resource
231 /* WARNING: Please see the comment in dlm_init_lockres before
232 * adding fields here. */
233 struct hlist_node hash_node
;
234 struct qstr lockname
;
237 /* please keep these next 3 in this order
238 * some funcs want to iterate over all lists */
239 struct list_head granted
;
240 struct list_head converting
;
241 struct list_head blocked
;
243 struct list_head dirty
;
244 struct list_head recovering
; // dlm_recovery_ctxt.resources list
246 /* unused lock resources have their last_used stamped and are
247 * put on a list for the dlm thread to run. */
248 struct list_head purge
;
249 unsigned long last_used
;
251 unsigned migration_pending
:1;
252 atomic_t asts_reserved
;
254 wait_queue_head_t wq
;
255 u8 owner
; //node which owns the lock resource, or unknown
257 char lvb
[DLM_LVB_LEN
];
260 struct dlm_migratable_lock
264 /* these 3 are just padding for the in-memory structure, but
265 * list and flags are actually used when sent over the wire */
267 u8 list
; // 0=granted, 1=converting, 2=blocked
278 struct dlm_migratable_lock ml
;
280 struct list_head list
;
281 struct list_head ast_list
;
282 struct list_head bast_list
;
283 struct dlm_lock_resource
*lockres
;
285 struct kref lock_refs
;
287 // ast and bast must be callable while holding a spinlock!
288 dlm_astlockfunc_t
*ast
;
289 dlm_bastlockfunc_t
*bast
;
291 struct dlm_lockstatus
*lksb
;
292 unsigned ast_pending
:1,
298 lksb_kernel_allocated
:1;
302 #define DLM_LKSB_UNUSED1 0x01
303 #define DLM_LKSB_PUT_LVB 0x02
304 #define DLM_LKSB_GET_LVB 0x04
305 #define DLM_LKSB_UNUSED2 0x08
306 #define DLM_LKSB_UNUSED3 0x10
307 #define DLM_LKSB_UNUSED4 0x20
308 #define DLM_LKSB_UNUSED5 0x40
309 #define DLM_LKSB_UNUSED6 0x80
312 enum dlm_lockres_list
{
313 DLM_GRANTED_LIST
= 0,
318 static inline int dlm_lvb_is_empty(char *lvb
)
321 for (i
=0; i
<DLM_LVB_LEN
; i
++)
327 static inline struct list_head
*
328 dlm_list_idx_to_ptr(struct dlm_lock_resource
*res
, enum dlm_lockres_list idx
)
330 struct list_head
*ret
= NULL
;
331 if (idx
== DLM_GRANTED_LIST
)
333 else if (idx
== DLM_CONVERTING_LIST
)
334 ret
= &res
->converting
;
335 else if (idx
== DLM_BLOCKED_LIST
)
347 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
353 DLM_MASTER_REQUEST_MSG
= 500,
354 DLM_UNUSED_MSG1
, /* 501 */
355 DLM_ASSERT_MASTER_MSG
, /* 502 */
356 DLM_CREATE_LOCK_MSG
, /* 503 */
357 DLM_CONVERT_LOCK_MSG
, /* 504 */
358 DLM_PROXY_AST_MSG
, /* 505 */
359 DLM_UNLOCK_LOCK_MSG
, /* 506 */
360 DLM_UNUSED_MSG2
, /* 507 */
361 DLM_MIGRATE_REQUEST_MSG
, /* 508 */
362 DLM_MIG_LOCKRES_MSG
, /* 509 */
363 DLM_QUERY_JOIN_MSG
, /* 510 */
364 DLM_ASSERT_JOINED_MSG
, /* 511 */
365 DLM_CANCEL_JOIN_MSG
, /* 512 */
366 DLM_EXIT_DOMAIN_MSG
, /* 513 */
367 DLM_MASTER_REQUERY_MSG
, /* 514 */
368 DLM_LOCK_REQUEST_MSG
, /* 515 */
369 DLM_RECO_DATA_DONE_MSG
, /* 516 */
370 DLM_BEGIN_RECO_MSG
, /* 517 */
371 DLM_FINALIZE_RECO_MSG
/* 518 */
374 struct dlm_reco_node_data
378 struct list_head list
;
382 DLM_RECO_NODE_DATA_DEAD
= -1,
383 DLM_RECO_NODE_DATA_INIT
= 0,
384 DLM_RECO_NODE_DATA_REQUESTING
,
385 DLM_RECO_NODE_DATA_REQUESTED
,
386 DLM_RECO_NODE_DATA_RECEIVING
,
387 DLM_RECO_NODE_DATA_DONE
,
388 DLM_RECO_NODE_DATA_FINALIZE_SENT
,
393 DLM_MASTER_RESP_NO
= 0,
395 DLM_MASTER_RESP_MAYBE
,
396 DLM_MASTER_RESP_ERROR
400 struct dlm_master_request
407 u8 name
[O2NM_MAX_NAME_LEN
];
410 #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
411 #define DLM_ASSERT_MASTER_REQUERY 0x00000002
412 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
413 struct dlm_assert_master
420 u8 name
[O2NM_MAX_NAME_LEN
];
423 struct dlm_migrate_request
430 u8 name
[O2NM_MAX_NAME_LEN
];
433 struct dlm_master_requery
440 u8 name
[O2NM_MAX_NAME_LEN
];
443 #define DLM_MRES_RECOVERY 0x01
444 #define DLM_MRES_MIGRATION 0x02
445 #define DLM_MRES_ALL_DONE 0x04
448 * We would like to get one whole lockres into a single network
449 * message whenever possible. Generally speaking, there will be
450 * at most one dlm_lock on a lockres for each node in the cluster,
451 * plus (infrequently) any additional locks coming in from userdlm.
453 * struct _dlm_lockres_page
455 * dlm_migratable_lockres mres;
456 * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
457 * u8 pad[DLM_MIG_LOCKRES_RESERVED];
460 * from ../cluster/tcp.h
461 * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
462 * (roughly 4080 bytes)
463 * and sizeof(dlm_migratable_lockres) = 112 bytes
464 * and sizeof(dlm_migratable_lock) = 16 bytes
466 * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
467 * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
469 * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
470 * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
471 * NET_MAX_PAYLOAD_BYTES
472 * (240 * 16) + 112 + 128 = 4080
474 * So a lockres would need more than 240 locks before it would
475 * use more than one network packet to recover. Not too bad.
477 #define DLM_MAX_MIGRATABLE_LOCKS 240
479 struct dlm_migratable_lockres
483 u8 num_locks
; // locks sent in this structure
485 __be32 total_locks
; // locks to be sent for this migration cookie
486 __be64 mig_cookie
; // cookie for this lockres migration
487 // or zero if not needed
489 u8 lockname
[DLM_LOCKID_NAME_MAX
];
493 struct dlm_migratable_lock ml
[0]; // 16 bytes each, begins at byte 112
495 #define DLM_MIG_LOCKRES_MAX_LEN \
496 (sizeof(struct dlm_migratable_lockres) + \
497 (sizeof(struct dlm_migratable_lock) * \
498 DLM_MAX_MIGRATABLE_LOCKS) )
500 /* from above, 128 bytes
501 * for some undetermined future use */
502 #define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
503 DLM_MIG_LOCKRES_MAX_LEN)
505 struct dlm_create_lock
515 u8 name
[O2NM_MAX_NAME_LEN
];
518 struct dlm_convert_lock
528 u8 name
[O2NM_MAX_NAME_LEN
];
532 #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
534 struct dlm_unlock_lock
543 u8 name
[O2NM_MAX_NAME_LEN
];
547 #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
559 u8 name
[O2NM_MAX_NAME_LEN
];
563 #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
565 #define DLM_MOD_KEY (0x666c6172)
566 enum dlm_query_join_response
{
572 struct dlm_lock_request
580 struct dlm_reco_data_done
588 /* eventually we can use this to attempt
589 * lvb recovery based on each node's info */
590 u8 reco_lvb
[DLM_LVB_LEN
];
593 struct dlm_begin_reco
602 struct dlm_query_join_request
607 u8 domain
[O2NM_MAX_NAME_LEN
];
610 struct dlm_assert_joined
615 u8 domain
[O2NM_MAX_NAME_LEN
];
618 struct dlm_cancel_join
623 u8 domain
[O2NM_MAX_NAME_LEN
];
626 struct dlm_exit_domain
632 struct dlm_finalize_reco
640 static inline enum dlm_status
641 __dlm_lockres_state_to_status(struct dlm_lock_resource
*res
)
643 enum dlm_status status
= DLM_NORMAL
;
645 assert_spin_locked(&res
->spinlock
);
647 if (res
->state
& DLM_LOCK_RES_RECOVERING
)
648 status
= DLM_RECOVERING
;
649 else if (res
->state
& DLM_LOCK_RES_MIGRATING
)
650 status
= DLM_MIGRATING
;
651 else if (res
->state
& DLM_LOCK_RES_IN_PROGRESS
)
652 status
= DLM_FORWARD
;
657 static inline u8
dlm_get_lock_cookie_node(u64 cookie
)
661 ret
= (u8
)(cookie
& 0xffULL
);
665 static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie
)
667 unsigned long long ret
;
668 ret
= ((unsigned long long)cookie
) & 0x00ffffffffffffffULL
;
672 struct dlm_lock
* dlm_new_lock(int type
, u8 node
, u64 cookie
,
673 struct dlm_lockstatus
*lksb
);
674 void dlm_lock_get(struct dlm_lock
*lock
);
675 void dlm_lock_put(struct dlm_lock
*lock
);
677 void dlm_lock_attach_lockres(struct dlm_lock
*lock
,
678 struct dlm_lock_resource
*res
);
680 int dlm_create_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
681 int dlm_convert_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
682 int dlm_proxy_ast_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
684 void dlm_revert_pending_convert(struct dlm_lock_resource
*res
,
685 struct dlm_lock
*lock
);
686 void dlm_revert_pending_lock(struct dlm_lock_resource
*res
,
687 struct dlm_lock
*lock
);
689 int dlm_unlock_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
690 void dlm_commit_pending_cancel(struct dlm_lock_resource
*res
,
691 struct dlm_lock
*lock
);
692 void dlm_commit_pending_unlock(struct dlm_lock_resource
*res
,
693 struct dlm_lock
*lock
);
695 int dlm_launch_thread(struct dlm_ctxt
*dlm
);
696 void dlm_complete_thread(struct dlm_ctxt
*dlm
);
697 int dlm_launch_recovery_thread(struct dlm_ctxt
*dlm
);
698 void dlm_complete_recovery_thread(struct dlm_ctxt
*dlm
);
699 void dlm_wait_for_recovery(struct dlm_ctxt
*dlm
);
700 void dlm_kick_recovery_thread(struct dlm_ctxt
*dlm
);
701 int dlm_is_node_dead(struct dlm_ctxt
*dlm
, u8 node
);
702 int dlm_wait_for_node_death(struct dlm_ctxt
*dlm
, u8 node
, int timeout
);
704 void dlm_put(struct dlm_ctxt
*dlm
);
705 struct dlm_ctxt
*dlm_grab(struct dlm_ctxt
*dlm
);
706 int dlm_domain_fully_joined(struct dlm_ctxt
*dlm
);
708 void __dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
709 struct dlm_lock_resource
*res
);
710 void dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
711 struct dlm_lock_resource
*res
);
712 void dlm_purge_lockres(struct dlm_ctxt
*dlm
,
713 struct dlm_lock_resource
*lockres
);
714 static inline void dlm_lockres_get(struct dlm_lock_resource
*res
)
716 /* This is called on every lookup, so it might be worth
718 kref_get(&res
->refs
);
720 void dlm_lockres_put(struct dlm_lock_resource
*res
);
721 void __dlm_unhash_lockres(struct dlm_lock_resource
*res
);
722 void __dlm_insert_lockres(struct dlm_ctxt
*dlm
,
723 struct dlm_lock_resource
*res
);
724 struct dlm_lock_resource
* __dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
728 struct dlm_lock_resource
* dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
732 int dlm_is_host_down(int errno
);
733 void dlm_change_lockres_owner(struct dlm_ctxt
*dlm
,
734 struct dlm_lock_resource
*res
,
736 struct dlm_lock_resource
* dlm_get_lock_resource(struct dlm_ctxt
*dlm
,
739 struct dlm_lock_resource
*dlm_new_lockres(struct dlm_ctxt
*dlm
,
741 unsigned int namelen
);
743 void dlm_queue_ast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
744 void dlm_queue_bast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
745 void dlm_do_local_ast(struct dlm_ctxt
*dlm
,
746 struct dlm_lock_resource
*res
,
747 struct dlm_lock
*lock
);
748 int dlm_do_remote_ast(struct dlm_ctxt
*dlm
,
749 struct dlm_lock_resource
*res
,
750 struct dlm_lock
*lock
);
751 void dlm_do_local_bast(struct dlm_ctxt
*dlm
,
752 struct dlm_lock_resource
*res
,
753 struct dlm_lock
*lock
,
755 int dlm_send_proxy_ast_msg(struct dlm_ctxt
*dlm
,
756 struct dlm_lock_resource
*res
,
757 struct dlm_lock
*lock
,
759 int blocked_type
, int flags
);
760 static inline int dlm_send_proxy_bast(struct dlm_ctxt
*dlm
,
761 struct dlm_lock_resource
*res
,
762 struct dlm_lock
*lock
,
765 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_BAST
,
769 static inline int dlm_send_proxy_ast(struct dlm_ctxt
*dlm
,
770 struct dlm_lock_resource
*res
,
771 struct dlm_lock
*lock
,
774 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_AST
,
778 void dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
779 void __dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
781 u8
dlm_nm_this_node(struct dlm_ctxt
*dlm
);
782 void dlm_kick_thread(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
783 void __dlm_dirty_lockres(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
786 int dlm_nm_init(struct dlm_ctxt
*dlm
);
787 int dlm_heartbeat_init(struct dlm_ctxt
*dlm
);
788 void dlm_hb_node_down_cb(struct o2nm_node
*node
, int idx
, void *data
);
789 void dlm_hb_node_up_cb(struct o2nm_node
*node
, int idx
, void *data
);
791 int dlm_lockres_is_dirty(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
792 int dlm_migrate_lockres(struct dlm_ctxt
*dlm
,
793 struct dlm_lock_resource
*res
,
795 int dlm_finish_migration(struct dlm_ctxt
*dlm
,
796 struct dlm_lock_resource
*res
,
798 void dlm_lockres_release_ast(struct dlm_ctxt
*dlm
,
799 struct dlm_lock_resource
*res
);
800 void __dlm_lockres_reserve_ast(struct dlm_lock_resource
*res
);
802 int dlm_master_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
803 int dlm_assert_master_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
804 int dlm_migrate_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
805 int dlm_mig_lockres_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
806 int dlm_master_requery_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
807 int dlm_request_all_locks_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
808 int dlm_reco_data_done_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
809 int dlm_begin_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
810 int dlm_finalize_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
);
811 int dlm_do_master_requery(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
,
812 u8 nodenum
, u8
*real_master
);
813 int dlm_lockres_master_requery(struct dlm_ctxt
*dlm
,
814 struct dlm_lock_resource
*res
, u8
*real_master
);
817 int dlm_dispatch_assert_master(struct dlm_ctxt
*dlm
,
818 struct dlm_lock_resource
*res
,
824 int dlm_send_one_lockres(struct dlm_ctxt
*dlm
,
825 struct dlm_lock_resource
*res
,
826 struct dlm_migratable_lockres
*mres
,
829 void dlm_move_lockres_to_recovery_list(struct dlm_ctxt
*dlm
,
830 struct dlm_lock_resource
*res
);
832 /* will exit holding res->spinlock, but may drop in function */
833 void __dlm_wait_on_lockres_flags(struct dlm_lock_resource
*res
, int flags
);
834 void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource
*res
, int flags
);
836 /* will exit holding res->spinlock, but may drop in function */
837 static inline void __dlm_wait_on_lockres(struct dlm_lock_resource
*res
)
839 __dlm_wait_on_lockres_flags(res
, (DLM_LOCK_RES_IN_PROGRESS
|
840 DLM_LOCK_RES_RECOVERING
|
841 DLM_LOCK_RES_MIGRATING
));
845 int dlm_init_mle_cache(void);
846 void dlm_destroy_mle_cache(void);
847 void dlm_hb_event_notify_attached(struct dlm_ctxt
*dlm
, int idx
, int node_up
);
848 void dlm_clean_master_list(struct dlm_ctxt
*dlm
,
850 int dlm_lock_basts_flushed(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
853 static inline const char * dlm_lock_mode_name(int mode
)
867 static inline int dlm_lock_compatible(int existing
, int request
)
869 /* NO_LOCK compatible with all */
870 if (request
== LKM_NLMODE
||
871 existing
== LKM_NLMODE
)
874 /* EX incompatible with all non-NO_LOCK */
875 if (request
== LKM_EXMODE
)
878 /* request must be PR, which is compatible with PR */
879 if (existing
== LKM_PRMODE
)
885 static inline int dlm_lock_on_list(struct list_head
*head
,
886 struct dlm_lock
*lock
)
888 struct list_head
*iter
;
889 struct dlm_lock
*tmplock
;
891 list_for_each(iter
, head
) {
892 tmplock
= list_entry(iter
, struct dlm_lock
, list
);
900 static inline enum dlm_status
dlm_err_to_dlm_status(int err
)
905 else if (err
== -ETIMEDOUT
|| o2net_link_down(err
, NULL
))
907 else if (err
== -EINVAL
)
909 else if (err
== -ENAMETOOLONG
)
917 static inline void dlm_node_iter_init(unsigned long *map
,
918 struct dlm_node_iter
*iter
)
920 memcpy(iter
->node_map
, map
, sizeof(iter
->node_map
));
924 static inline int dlm_node_iter_next(struct dlm_node_iter
*iter
)
927 bit
= find_next_bit(iter
->node_map
, O2NM_MAX_NODES
, iter
->curnode
+1);
928 if (bit
>= O2NM_MAX_NODES
) {
929 iter
->curnode
= O2NM_MAX_NODES
;
938 #endif /* DLMCOMMON_H */