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)
58 struct dlm_lock_name
{
60 u8 name
[DLM_LOCKID_NAME_MAX
];
63 struct dlm_master_list_entry
{
64 struct list_head list
;
65 struct list_head hb_events
;
72 unsigned long maybe_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
73 unsigned long vote_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
74 unsigned long response_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
75 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
78 enum dlm_mle_type type
;
79 struct o2hb_callback_func mle_hb_up
;
80 struct o2hb_callback_func mle_hb_down
;
82 struct dlm_lock_resource
*res
;
83 struct dlm_lock_name name
;
94 #define LKM_VALID_FLAGS (LKM_VALBLK | LKM_CONVERT | LKM_UNLOCK | \
95 LKM_CANCEL | LKM_INVVALBLK | LKM_FORCE | \
96 LKM_RECOVERY | LKM_LOCAL | LKM_NOQUEUE)
98 #define DLM_RECOVERY_LOCK_NAME "$RECOVERY"
99 #define DLM_RECOVERY_LOCK_NAME_LEN 9
101 static inline int dlm_is_recovery_lock(const char *lock_name
, int name_len
)
103 if (name_len
== DLM_RECOVERY_LOCK_NAME_LEN
&&
104 memcmp(lock_name
, DLM_RECOVERY_LOCK_NAME
, name_len
)==0)
109 #define DLM_RECO_STATE_ACTIVE 0x0001
110 #define DLM_RECO_STATE_FINALIZE 0x0002
112 struct dlm_recovery_ctxt
114 struct list_head resources
;
115 struct list_head received
;
116 struct list_head node_data
;
120 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
121 wait_queue_head_t event
;
124 enum dlm_ctxt_state
{
127 DLM_CTXT_IN_SHUTDOWN
,
133 struct list_head list
;
134 struct hlist_head
**lockres_hash
;
135 struct list_head dirty_list
;
136 struct list_head purge_list
;
137 struct list_head pending_asts
;
138 struct list_head pending_basts
;
139 struct list_head tracking_list
;
140 unsigned int purge_count
;
143 spinlock_t track_lock
;
148 wait_queue_head_t dlm_join_events
;
149 unsigned long live_nodes_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
150 unsigned long domain_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
151 unsigned long recovery_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
152 struct dlm_recovery_ctxt reco
;
153 spinlock_t master_lock
;
154 struct list_head master_list
;
155 struct list_head mle_hb_events
;
157 /* these give a really vague idea of the system load */
158 atomic_t local_resources
;
159 atomic_t remote_resources
;
160 atomic_t unknown_resources
;
162 struct dlm_debug_ctxt
*dlm_debug_ctxt
;
163 struct dentry
*dlm_debugfs_subroot
;
165 /* NOTE: Next three are protected by dlm_domain_lock */
166 struct kref dlm_refs
;
167 enum dlm_ctxt_state dlm_state
;
168 unsigned int num_joins
;
170 struct o2hb_callback_func dlm_hb_up
;
171 struct o2hb_callback_func dlm_hb_down
;
172 struct task_struct
*dlm_thread_task
;
173 struct task_struct
*dlm_reco_thread_task
;
174 struct workqueue_struct
*dlm_worker
;
175 wait_queue_head_t dlm_thread_wq
;
176 wait_queue_head_t dlm_reco_thread_wq
;
177 wait_queue_head_t ast_wq
;
178 wait_queue_head_t migration_wq
;
180 struct work_struct dispatched_work
;
181 struct list_head work_list
;
182 spinlock_t work_lock
;
183 struct list_head dlm_domain_handlers
;
184 struct list_head dlm_eviction_callbacks
;
186 /* The filesystem specifies this at domain registration. We
187 * cache it here to know what to tell other nodes. */
188 struct dlm_protocol_version fs_locking_proto
;
189 /* This is the inter-dlm communication version */
190 struct dlm_protocol_version dlm_locking_proto
;
193 static inline struct hlist_head
*dlm_lockres_hash(struct dlm_ctxt
*dlm
, unsigned i
)
195 return dlm
->lockres_hash
[(i
/ DLM_BUCKETS_PER_PAGE
) % DLM_HASH_PAGES
] + (i
% DLM_BUCKETS_PER_PAGE
);
198 /* these keventd work queue items are for less-frequently
199 * called functions that cannot be directly called from the
200 * net message handlers for some reason, usually because
201 * they need to send net messages of their own. */
202 void dlm_dispatch_work(struct work_struct
*work
);
204 struct dlm_lock_resource
;
205 struct dlm_work_item
;
207 typedef void (dlm_workfunc_t
)(struct dlm_work_item
*, void *);
209 struct dlm_request_all_locks_priv
215 struct dlm_mig_lockres_priv
217 struct dlm_lock_resource
*lockres
;
222 struct dlm_assert_master_priv
224 struct dlm_lock_resource
*lockres
;
227 unsigned ignore_higher
:1;
230 struct dlm_deref_lockres_priv
232 struct dlm_lock_resource
*deref_res
;
238 struct list_head list
;
239 dlm_workfunc_t
*func
;
240 struct dlm_ctxt
*dlm
;
243 struct dlm_request_all_locks_priv ral
;
244 struct dlm_mig_lockres_priv ml
;
245 struct dlm_assert_master_priv am
;
246 struct dlm_deref_lockres_priv dl
;
250 static inline void dlm_init_work_item(struct dlm_ctxt
*dlm
,
251 struct dlm_work_item
*i
,
252 dlm_workfunc_t
*f
, void *data
)
254 memset(i
, 0, sizeof(*i
));
256 INIT_LIST_HEAD(&i
->list
);
258 i
->dlm
= dlm
; /* must have already done a dlm_grab on this! */
263 static inline void __dlm_set_joining_node(struct dlm_ctxt
*dlm
,
266 assert_spin_locked(&dlm
->spinlock
);
268 dlm
->joining_node
= node
;
269 wake_up(&dlm
->dlm_join_events
);
272 #define DLM_LOCK_RES_UNINITED 0x00000001
273 #define DLM_LOCK_RES_RECOVERING 0x00000002
274 #define DLM_LOCK_RES_READY 0x00000004
275 #define DLM_LOCK_RES_DIRTY 0x00000008
276 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010
277 #define DLM_LOCK_RES_MIGRATING 0x00000020
278 #define DLM_LOCK_RES_DROPPING_REF 0x00000040
279 #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000
280 #define DLM_LOCK_RES_SETREF_INPROG 0x00002000
282 /* max milliseconds to wait to sync up a network failure with a node death */
283 #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
285 #define DLM_PURGE_INTERVAL_MS (8 * 1000)
287 struct dlm_lock_resource
289 /* WARNING: Please see the comment in dlm_init_lockres before
290 * adding fields here. */
291 struct hlist_node hash_node
;
292 struct qstr lockname
;
296 * Please keep granted, converting, and blocked in this order,
297 * as some funcs want to iterate over all lists.
299 * All four lists are protected by the hash's reference.
301 struct list_head granted
;
302 struct list_head converting
;
303 struct list_head blocked
;
304 struct list_head purge
;
307 * These two lists require you to hold an additional reference
308 * while they are on the list.
310 struct list_head dirty
;
311 struct list_head recovering
; // dlm_recovery_ctxt.resources list
313 /* Added during init and removed during release */
314 struct list_head tracking
; /* dlm->tracking_list */
316 /* unused lock resources have their last_used stamped and are
317 * put on a list for the dlm thread to run. */
318 unsigned long last_used
;
320 struct dlm_ctxt
*dlm
;
322 unsigned migration_pending
:1;
323 atomic_t asts_reserved
;
325 wait_queue_head_t wq
;
326 u8 owner
; //node which owns the lock resource, or unknown
328 char lvb
[DLM_LVB_LEN
];
329 unsigned int inflight_locks
;
330 unsigned long refmap
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
333 struct dlm_migratable_lock
337 /* these 3 are just padding for the in-memory structure, but
338 * list and flags are actually used when sent over the wire */
340 u8 list
; // 0=granted, 1=converting, 2=blocked
351 struct dlm_migratable_lock ml
;
353 struct list_head list
;
354 struct list_head ast_list
;
355 struct list_head bast_list
;
356 struct dlm_lock_resource
*lockres
;
358 struct kref lock_refs
;
360 // ast and bast must be callable while holding a spinlock!
361 dlm_astlockfunc_t
*ast
;
362 dlm_bastlockfunc_t
*bast
;
364 struct dlm_lockstatus
*lksb
;
365 unsigned ast_pending
:1,
371 lksb_kernel_allocated
:1;
375 #define DLM_LKSB_UNUSED1 0x01
376 #define DLM_LKSB_PUT_LVB 0x02
377 #define DLM_LKSB_GET_LVB 0x04
378 #define DLM_LKSB_UNUSED2 0x08
379 #define DLM_LKSB_UNUSED3 0x10
380 #define DLM_LKSB_UNUSED4 0x20
381 #define DLM_LKSB_UNUSED5 0x40
382 #define DLM_LKSB_UNUSED6 0x80
385 enum dlm_lockres_list
{
386 DLM_GRANTED_LIST
= 0,
391 static inline int dlm_lvb_is_empty(char *lvb
)
394 for (i
=0; i
<DLM_LVB_LEN
; i
++)
400 static inline struct list_head
*
401 dlm_list_idx_to_ptr(struct dlm_lock_resource
*res
, enum dlm_lockres_list idx
)
403 struct list_head
*ret
= NULL
;
404 if (idx
== DLM_GRANTED_LIST
)
406 else if (idx
== DLM_CONVERTING_LIST
)
407 ret
= &res
->converting
;
408 else if (idx
== DLM_BLOCKED_LIST
)
420 unsigned long node_map
[BITS_TO_LONGS(O2NM_MAX_NODES
)];
426 DLM_MASTER_REQUEST_MSG
= 500,
427 DLM_UNUSED_MSG1
, /* 501 */
428 DLM_ASSERT_MASTER_MSG
, /* 502 */
429 DLM_CREATE_LOCK_MSG
, /* 503 */
430 DLM_CONVERT_LOCK_MSG
, /* 504 */
431 DLM_PROXY_AST_MSG
, /* 505 */
432 DLM_UNLOCK_LOCK_MSG
, /* 506 */
433 DLM_DEREF_LOCKRES_MSG
, /* 507 */
434 DLM_MIGRATE_REQUEST_MSG
, /* 508 */
435 DLM_MIG_LOCKRES_MSG
, /* 509 */
436 DLM_QUERY_JOIN_MSG
, /* 510 */
437 DLM_ASSERT_JOINED_MSG
, /* 511 */
438 DLM_CANCEL_JOIN_MSG
, /* 512 */
439 DLM_EXIT_DOMAIN_MSG
, /* 513 */
440 DLM_MASTER_REQUERY_MSG
, /* 514 */
441 DLM_LOCK_REQUEST_MSG
, /* 515 */
442 DLM_RECO_DATA_DONE_MSG
, /* 516 */
443 DLM_BEGIN_RECO_MSG
, /* 517 */
444 DLM_FINALIZE_RECO_MSG
/* 518 */
447 struct dlm_reco_node_data
451 struct list_head list
;
455 DLM_RECO_NODE_DATA_DEAD
= -1,
456 DLM_RECO_NODE_DATA_INIT
= 0,
457 DLM_RECO_NODE_DATA_REQUESTING
,
458 DLM_RECO_NODE_DATA_REQUESTED
,
459 DLM_RECO_NODE_DATA_RECEIVING
,
460 DLM_RECO_NODE_DATA_DONE
,
461 DLM_RECO_NODE_DATA_FINALIZE_SENT
,
466 DLM_MASTER_RESP_NO
= 0,
468 DLM_MASTER_RESP_MAYBE
,
469 DLM_MASTER_RESP_ERROR
473 struct dlm_master_request
480 u8 name
[O2NM_MAX_NAME_LEN
];
483 #define DLM_ASSERT_RESPONSE_REASSERT 0x00000001
484 #define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002
486 #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
487 #define DLM_ASSERT_MASTER_REQUERY 0x00000002
488 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
489 struct dlm_assert_master
496 u8 name
[O2NM_MAX_NAME_LEN
];
499 #define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001
501 struct dlm_migrate_request
508 u8 name
[O2NM_MAX_NAME_LEN
];
511 struct dlm_master_requery
518 u8 name
[O2NM_MAX_NAME_LEN
];
521 #define DLM_MRES_RECOVERY 0x01
522 #define DLM_MRES_MIGRATION 0x02
523 #define DLM_MRES_ALL_DONE 0x04
526 * We would like to get one whole lockres into a single network
527 * message whenever possible. Generally speaking, there will be
528 * at most one dlm_lock on a lockres for each node in the cluster,
529 * plus (infrequently) any additional locks coming in from userdlm.
531 * struct _dlm_lockres_page
533 * dlm_migratable_lockres mres;
534 * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
535 * u8 pad[DLM_MIG_LOCKRES_RESERVED];
538 * from ../cluster/tcp.h
539 * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
540 * (roughly 4080 bytes)
541 * and sizeof(dlm_migratable_lockres) = 112 bytes
542 * and sizeof(dlm_migratable_lock) = 16 bytes
544 * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
545 * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
547 * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
548 * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
549 * NET_MAX_PAYLOAD_BYTES
550 * (240 * 16) + 112 + 128 = 4080
552 * So a lockres would need more than 240 locks before it would
553 * use more than one network packet to recover. Not too bad.
555 #define DLM_MAX_MIGRATABLE_LOCKS 240
557 struct dlm_migratable_lockres
561 u8 num_locks
; // locks sent in this structure
563 __be32 total_locks
; // locks to be sent for this migration cookie
564 __be64 mig_cookie
; // cookie for this lockres migration
565 // or zero if not needed
567 u8 lockname
[DLM_LOCKID_NAME_MAX
];
571 struct dlm_migratable_lock ml
[0]; // 16 bytes each, begins at byte 112
573 #define DLM_MIG_LOCKRES_MAX_LEN \
574 (sizeof(struct dlm_migratable_lockres) + \
575 (sizeof(struct dlm_migratable_lock) * \
576 DLM_MAX_MIGRATABLE_LOCKS) )
578 /* from above, 128 bytes
579 * for some undetermined future use */
580 #define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
581 DLM_MIG_LOCKRES_MAX_LEN)
583 struct dlm_create_lock
593 u8 name
[O2NM_MAX_NAME_LEN
];
596 struct dlm_convert_lock
606 u8 name
[O2NM_MAX_NAME_LEN
];
610 #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
612 struct dlm_unlock_lock
621 u8 name
[O2NM_MAX_NAME_LEN
];
625 #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
637 u8 name
[O2NM_MAX_NAME_LEN
];
641 #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
643 #define DLM_MOD_KEY (0x666c6172)
644 enum dlm_query_join_response_code
{
648 JOIN_PROTOCOL_MISMATCH
,
651 struct dlm_query_join_packet
{
652 u8 code
; /* Response code. dlm_minor and fs_minor
653 are only valid if this is JOIN_OK */
654 u8 dlm_minor
; /* The minor version of the protocol the
656 u8 fs_minor
; /* The minor version of the protocol the
657 filesystem is speaking. */
661 union dlm_query_join_response
{
663 struct dlm_query_join_packet packet
;
666 struct dlm_lock_request
674 struct dlm_reco_data_done
682 /* eventually we can use this to attempt
683 * lvb recovery based on each node's info */
684 u8 reco_lvb
[DLM_LVB_LEN
];
687 struct dlm_begin_reco
696 #define BITS_PER_BYTE 8
697 #define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE)
699 struct dlm_query_join_request
704 struct dlm_protocol_version dlm_proto
;
705 struct dlm_protocol_version fs_proto
;
706 u8 domain
[O2NM_MAX_NAME_LEN
];
707 u8 node_map
[BITS_TO_BYTES(O2NM_MAX_NODES
)];
710 struct dlm_assert_joined
715 u8 domain
[O2NM_MAX_NAME_LEN
];
718 struct dlm_cancel_join
723 u8 domain
[O2NM_MAX_NAME_LEN
];
726 struct dlm_exit_domain
732 struct dlm_finalize_reco
741 struct dlm_deref_lockres
748 u8 name
[O2NM_MAX_NAME_LEN
];
751 static inline enum dlm_status
752 __dlm_lockres_state_to_status(struct dlm_lock_resource
*res
)
754 enum dlm_status status
= DLM_NORMAL
;
756 assert_spin_locked(&res
->spinlock
);
758 if (res
->state
& DLM_LOCK_RES_RECOVERING
)
759 status
= DLM_RECOVERING
;
760 else if (res
->state
& DLM_LOCK_RES_MIGRATING
)
761 status
= DLM_MIGRATING
;
762 else if (res
->state
& DLM_LOCK_RES_IN_PROGRESS
)
763 status
= DLM_FORWARD
;
768 static inline u8
dlm_get_lock_cookie_node(u64 cookie
)
772 ret
= (u8
)(cookie
& 0xffULL
);
776 static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie
)
778 unsigned long long ret
;
779 ret
= ((unsigned long long)cookie
) & 0x00ffffffffffffffULL
;
783 struct dlm_lock
* dlm_new_lock(int type
, u8 node
, u64 cookie
,
784 struct dlm_lockstatus
*lksb
);
785 void dlm_lock_get(struct dlm_lock
*lock
);
786 void dlm_lock_put(struct dlm_lock
*lock
);
788 void dlm_lock_attach_lockres(struct dlm_lock
*lock
,
789 struct dlm_lock_resource
*res
);
791 int dlm_create_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
793 int dlm_convert_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
795 int dlm_proxy_ast_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
798 void dlm_revert_pending_convert(struct dlm_lock_resource
*res
,
799 struct dlm_lock
*lock
);
800 void dlm_revert_pending_lock(struct dlm_lock_resource
*res
,
801 struct dlm_lock
*lock
);
803 int dlm_unlock_lock_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
805 void dlm_commit_pending_cancel(struct dlm_lock_resource
*res
,
806 struct dlm_lock
*lock
);
807 void dlm_commit_pending_unlock(struct dlm_lock_resource
*res
,
808 struct dlm_lock
*lock
);
810 int dlm_launch_thread(struct dlm_ctxt
*dlm
);
811 void dlm_complete_thread(struct dlm_ctxt
*dlm
);
812 int dlm_launch_recovery_thread(struct dlm_ctxt
*dlm
);
813 void dlm_complete_recovery_thread(struct dlm_ctxt
*dlm
);
814 void dlm_wait_for_recovery(struct dlm_ctxt
*dlm
);
815 void dlm_kick_recovery_thread(struct dlm_ctxt
*dlm
);
816 int dlm_is_node_dead(struct dlm_ctxt
*dlm
, u8 node
);
817 int dlm_wait_for_node_death(struct dlm_ctxt
*dlm
, u8 node
, int timeout
);
818 int dlm_wait_for_node_recovery(struct dlm_ctxt
*dlm
, u8 node
, int timeout
);
820 void dlm_put(struct dlm_ctxt
*dlm
);
821 struct dlm_ctxt
*dlm_grab(struct dlm_ctxt
*dlm
);
822 int dlm_domain_fully_joined(struct dlm_ctxt
*dlm
);
824 void __dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
825 struct dlm_lock_resource
*res
);
826 void dlm_lockres_calc_usage(struct dlm_ctxt
*dlm
,
827 struct dlm_lock_resource
*res
);
828 static inline void dlm_lockres_get(struct dlm_lock_resource
*res
)
830 /* This is called on every lookup, so it might be worth
832 kref_get(&res
->refs
);
834 void dlm_lockres_put(struct dlm_lock_resource
*res
);
835 void __dlm_unhash_lockres(struct dlm_lock_resource
*res
);
836 void __dlm_insert_lockres(struct dlm_ctxt
*dlm
,
837 struct dlm_lock_resource
*res
);
838 struct dlm_lock_resource
* __dlm_lookup_lockres_full(struct dlm_ctxt
*dlm
,
842 struct dlm_lock_resource
* __dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
846 struct dlm_lock_resource
* dlm_lookup_lockres(struct dlm_ctxt
*dlm
,
850 int dlm_is_host_down(int errno
);
851 void dlm_change_lockres_owner(struct dlm_ctxt
*dlm
,
852 struct dlm_lock_resource
*res
,
854 struct dlm_lock_resource
* dlm_get_lock_resource(struct dlm_ctxt
*dlm
,
858 struct dlm_lock_resource
*dlm_new_lockres(struct dlm_ctxt
*dlm
,
860 unsigned int namelen
);
862 #define dlm_lockres_set_refmap_bit(bit,res) \
863 __dlm_lockres_set_refmap_bit(bit,res,__FILE__,__LINE__)
864 #define dlm_lockres_clear_refmap_bit(bit,res) \
865 __dlm_lockres_clear_refmap_bit(bit,res,__FILE__,__LINE__)
867 static inline void __dlm_lockres_set_refmap_bit(int bit
,
868 struct dlm_lock_resource
*res
,
872 //printk("%s:%d:%.*s: setting bit %d\n", file, line,
873 // res->lockname.len, res->lockname.name, bit);
874 set_bit(bit
, res
->refmap
);
877 static inline void __dlm_lockres_clear_refmap_bit(int bit
,
878 struct dlm_lock_resource
*res
,
882 //printk("%s:%d:%.*s: clearing bit %d\n", file, line,
883 // res->lockname.len, res->lockname.name, bit);
884 clear_bit(bit
, res
->refmap
);
887 void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt
*dlm
,
888 struct dlm_lock_resource
*res
,
891 void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt
*dlm
,
892 struct dlm_lock_resource
*res
,
896 #define dlm_lockres_drop_inflight_ref(d,r) \
897 __dlm_lockres_drop_inflight_ref(d,r,__FILE__,__LINE__)
898 #define dlm_lockres_grab_inflight_ref(d,r) \
899 __dlm_lockres_grab_inflight_ref(d,r,0,__FILE__,__LINE__)
900 #define dlm_lockres_grab_inflight_ref_new(d,r) \
901 __dlm_lockres_grab_inflight_ref(d,r,1,__FILE__,__LINE__)
903 void dlm_queue_ast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
904 void dlm_queue_bast(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
905 void dlm_do_local_ast(struct dlm_ctxt
*dlm
,
906 struct dlm_lock_resource
*res
,
907 struct dlm_lock
*lock
);
908 int dlm_do_remote_ast(struct dlm_ctxt
*dlm
,
909 struct dlm_lock_resource
*res
,
910 struct dlm_lock
*lock
);
911 void dlm_do_local_bast(struct dlm_ctxt
*dlm
,
912 struct dlm_lock_resource
*res
,
913 struct dlm_lock
*lock
,
915 int dlm_send_proxy_ast_msg(struct dlm_ctxt
*dlm
,
916 struct dlm_lock_resource
*res
,
917 struct dlm_lock
*lock
,
919 int blocked_type
, int flags
);
920 static inline int dlm_send_proxy_bast(struct dlm_ctxt
*dlm
,
921 struct dlm_lock_resource
*res
,
922 struct dlm_lock
*lock
,
925 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_BAST
,
929 static inline int dlm_send_proxy_ast(struct dlm_ctxt
*dlm
,
930 struct dlm_lock_resource
*res
,
931 struct dlm_lock
*lock
,
934 return dlm_send_proxy_ast_msg(dlm
, res
, lock
, DLM_AST
,
938 void dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
939 void __dlm_print_one_lock_resource(struct dlm_lock_resource
*res
);
941 u8
dlm_nm_this_node(struct dlm_ctxt
*dlm
);
942 void dlm_kick_thread(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
943 void __dlm_dirty_lockres(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
946 int dlm_nm_init(struct dlm_ctxt
*dlm
);
947 int dlm_heartbeat_init(struct dlm_ctxt
*dlm
);
948 void dlm_hb_node_down_cb(struct o2nm_node
*node
, int idx
, void *data
);
949 void dlm_hb_node_up_cb(struct o2nm_node
*node
, int idx
, void *data
);
951 int dlm_empty_lockres(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
);
952 int dlm_finish_migration(struct dlm_ctxt
*dlm
,
953 struct dlm_lock_resource
*res
,
955 void dlm_lockres_release_ast(struct dlm_ctxt
*dlm
,
956 struct dlm_lock_resource
*res
);
957 void __dlm_lockres_reserve_ast(struct dlm_lock_resource
*res
);
959 int dlm_master_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
961 int dlm_assert_master_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
963 void dlm_assert_master_post_handler(int status
, void *data
, void *ret_data
);
964 int dlm_deref_lockres_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
966 int dlm_migrate_request_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
968 int dlm_mig_lockres_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
970 int dlm_master_requery_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
972 int dlm_request_all_locks_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
974 int dlm_reco_data_done_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
976 int dlm_begin_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
978 int dlm_finalize_reco_handler(struct o2net_msg
*msg
, u32 len
, void *data
,
980 int dlm_do_master_requery(struct dlm_ctxt
*dlm
, struct dlm_lock_resource
*res
,
981 u8 nodenum
, u8
*real_master
);
984 int dlm_dispatch_assert_master(struct dlm_ctxt
*dlm
,
985 struct dlm_lock_resource
*res
,
991 int dlm_send_one_lockres(struct dlm_ctxt
*dlm
,
992 struct dlm_lock_resource
*res
,
993 struct dlm_migratable_lockres
*mres
,
996 void dlm_move_lockres_to_recovery_list(struct dlm_ctxt
*dlm
,
997 struct dlm_lock_resource
*res
);
999 /* will exit holding res->spinlock, but may drop in function */
1000 void __dlm_wait_on_lockres_flags(struct dlm_lock_resource
*res
, int flags
);
1001 void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource
*res
, int flags
);
1003 /* will exit holding res->spinlock, but may drop in function */
1004 static inline void __dlm_wait_on_lockres(struct dlm_lock_resource
*res
)
1006 __dlm_wait_on_lockres_flags(res
, (DLM_LOCK_RES_IN_PROGRESS
|
1007 DLM_LOCK_RES_RECOVERING
|
1008 DLM_LOCK_RES_MIGRATING
));
1011 /* create/destroy slab caches */
1012 int dlm_init_master_caches(void);
1013 void dlm_destroy_master_caches(void);
1015 int dlm_init_lock_cache(void);
1016 void dlm_destroy_lock_cache(void);
1018 int dlm_init_mle_cache(void);
1019 void dlm_destroy_mle_cache(void);
1021 void dlm_hb_event_notify_attached(struct dlm_ctxt
*dlm
, int idx
, int node_up
);
1022 int dlm_drop_lockres_ref(struct dlm_ctxt
*dlm
,
1023 struct dlm_lock_resource
*res
);
1024 void dlm_clean_master_list(struct dlm_ctxt
*dlm
,
1026 int dlm_lock_basts_flushed(struct dlm_ctxt
*dlm
, struct dlm_lock
*lock
);
1027 int __dlm_lockres_has_locks(struct dlm_lock_resource
*res
);
1028 int __dlm_lockres_unused(struct dlm_lock_resource
*res
);
1030 static inline const char * dlm_lock_mode_name(int mode
)
1044 static inline int dlm_lock_compatible(int existing
, int request
)
1046 /* NO_LOCK compatible with all */
1047 if (request
== LKM_NLMODE
||
1048 existing
== LKM_NLMODE
)
1051 /* EX incompatible with all non-NO_LOCK */
1052 if (request
== LKM_EXMODE
)
1055 /* request must be PR, which is compatible with PR */
1056 if (existing
== LKM_PRMODE
)
1062 static inline int dlm_lock_on_list(struct list_head
*head
,
1063 struct dlm_lock
*lock
)
1065 struct list_head
*iter
;
1066 struct dlm_lock
*tmplock
;
1068 list_for_each(iter
, head
) {
1069 tmplock
= list_entry(iter
, struct dlm_lock
, list
);
1070 if (tmplock
== lock
)
1077 static inline enum dlm_status
dlm_err_to_dlm_status(int err
)
1079 enum dlm_status ret
;
1082 else if (err
== -ETIMEDOUT
|| o2net_link_down(err
, NULL
))
1083 ret
= DLM_NOLOCKMGR
;
1084 else if (err
== -EINVAL
)
1086 else if (err
== -ENAMETOOLONG
)
1094 static inline void dlm_node_iter_init(unsigned long *map
,
1095 struct dlm_node_iter
*iter
)
1097 memcpy(iter
->node_map
, map
, sizeof(iter
->node_map
));
1101 static inline int dlm_node_iter_next(struct dlm_node_iter
*iter
)
1104 bit
= find_next_bit(iter
->node_map
, O2NM_MAX_NODES
, iter
->curnode
+1);
1105 if (bit
>= O2NM_MAX_NODES
) {
1106 iter
->curnode
= O2NM_MAX_NODES
;
1109 iter
->curnode
= bit
;
1115 #endif /* DLMCOMMON_H */