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 unsigned char 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 *mleres;
83 struct dlm_lock_name mlename;
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 hlist_head **master_hash;
155 struct list_head master_list;
156 struct list_head mle_hb_events;
158 /* these give a really vague idea of the system load */
159 atomic_t local_resources;
160 atomic_t remote_resources;
161 atomic_t unknown_resources;
163 struct dlm_debug_ctxt *dlm_debug_ctxt;
164 struct dentry *dlm_debugfs_subroot;
166 /* NOTE: Next three are protected by dlm_domain_lock */
167 struct kref dlm_refs;
168 enum dlm_ctxt_state dlm_state;
169 unsigned int num_joins;
171 struct o2hb_callback_func dlm_hb_up;
172 struct o2hb_callback_func dlm_hb_down;
173 struct task_struct *dlm_thread_task;
174 struct task_struct *dlm_reco_thread_task;
175 struct workqueue_struct *dlm_worker;
176 wait_queue_head_t dlm_thread_wq;
177 wait_queue_head_t dlm_reco_thread_wq;
178 wait_queue_head_t ast_wq;
179 wait_queue_head_t migration_wq;
181 struct work_struct dispatched_work;
182 struct list_head work_list;
183 spinlock_t work_lock;
184 struct list_head dlm_domain_handlers;
185 struct list_head dlm_eviction_callbacks;
187 /* The filesystem specifies this at domain registration. We
188 * cache it here to know what to tell other nodes. */
189 struct dlm_protocol_version fs_locking_proto;
190 /* This is the inter-dlm communication version */
191 struct dlm_protocol_version dlm_locking_proto;
194 static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
196 return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE);
199 static inline struct hlist_head *dlm_master_hash(struct dlm_ctxt *dlm,
202 return dlm->master_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] +
203 (i % DLM_BUCKETS_PER_PAGE);
206 /* these keventd work queue items are for less-frequently
207 * called functions that cannot be directly called from the
208 * net message handlers for some reason, usually because
209 * they need to send net messages of their own. */
210 void dlm_dispatch_work(struct work_struct *work);
212 struct dlm_lock_resource;
213 struct dlm_work_item;
215 typedef void (dlm_workfunc_t)(struct dlm_work_item *, void *);
217 struct dlm_request_all_locks_priv
223 struct dlm_mig_lockres_priv
225 struct dlm_lock_resource *lockres;
230 struct dlm_assert_master_priv
232 struct dlm_lock_resource *lockres;
235 unsigned ignore_higher:1;
238 struct dlm_deref_lockres_priv
240 struct dlm_lock_resource *deref_res;
246 struct list_head list;
247 dlm_workfunc_t *func;
248 struct dlm_ctxt *dlm;
251 struct dlm_request_all_locks_priv ral;
252 struct dlm_mig_lockres_priv ml;
253 struct dlm_assert_master_priv am;
254 struct dlm_deref_lockres_priv dl;
258 static inline void dlm_init_work_item(struct dlm_ctxt *dlm,
259 struct dlm_work_item *i,
260 dlm_workfunc_t *f, void *data)
262 memset(i, 0, sizeof(*i));
264 INIT_LIST_HEAD(&i->list);
266 i->dlm = dlm; /* must have already done a dlm_grab on this! */
271 static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm,
274 assert_spin_locked(&dlm->spinlock);
276 dlm->joining_node = node;
277 wake_up(&dlm->dlm_join_events);
280 #define DLM_LOCK_RES_UNINITED 0x00000001
281 #define DLM_LOCK_RES_RECOVERING 0x00000002
282 #define DLM_LOCK_RES_READY 0x00000004
283 #define DLM_LOCK_RES_DIRTY 0x00000008
284 #define DLM_LOCK_RES_IN_PROGRESS 0x00000010
285 #define DLM_LOCK_RES_MIGRATING 0x00000020
286 #define DLM_LOCK_RES_DROPPING_REF 0x00000040
287 #define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000
288 #define DLM_LOCK_RES_SETREF_INPROG 0x00002000
290 /* max milliseconds to wait to sync up a network failure with a node death */
291 #define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
293 #define DLM_PURGE_INTERVAL_MS (8 * 1000)
295 struct dlm_lock_resource
297 /* WARNING: Please see the comment in dlm_init_lockres before
298 * adding fields here. */
299 struct hlist_node hash_node;
300 struct qstr lockname;
304 * Please keep granted, converting, and blocked in this order,
305 * as some funcs want to iterate over all lists.
307 * All four lists are protected by the hash's reference.
309 struct list_head granted;
310 struct list_head converting;
311 struct list_head blocked;
312 struct list_head purge;
315 * These two lists require you to hold an additional reference
316 * while they are on the list.
318 struct list_head dirty;
319 struct list_head recovering; // dlm_recovery_ctxt.resources list
321 /* Added during init and removed during release */
322 struct list_head tracking; /* dlm->tracking_list */
324 /* unused lock resources have their last_used stamped and are
325 * put on a list for the dlm thread to run. */
326 unsigned long last_used;
328 struct dlm_ctxt *dlm;
330 unsigned migration_pending:1;
331 atomic_t asts_reserved;
333 wait_queue_head_t wq;
334 u8 owner; //node which owns the lock resource, or unknown
336 char lvb[DLM_LVB_LEN];
337 unsigned int inflight_locks;
338 unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
341 struct dlm_migratable_lock
345 /* these 3 are just padding for the in-memory structure, but
346 * list and flags are actually used when sent over the wire */
348 u8 list; // 0=granted, 1=converting, 2=blocked
359 struct dlm_migratable_lock ml;
361 struct list_head list;
362 struct list_head ast_list;
363 struct list_head bast_list;
364 struct dlm_lock_resource *lockres;
366 struct kref lock_refs;
368 // ast and bast must be callable while holding a spinlock!
369 dlm_astlockfunc_t *ast;
370 dlm_bastlockfunc_t *bast;
372 struct dlm_lockstatus *lksb;
373 unsigned ast_pending:1,
379 lksb_kernel_allocated:1;
383 #define DLM_LKSB_UNUSED1 0x01
384 #define DLM_LKSB_PUT_LVB 0x02
385 #define DLM_LKSB_GET_LVB 0x04
386 #define DLM_LKSB_UNUSED2 0x08
387 #define DLM_LKSB_UNUSED3 0x10
388 #define DLM_LKSB_UNUSED4 0x20
389 #define DLM_LKSB_UNUSED5 0x40
390 #define DLM_LKSB_UNUSED6 0x80
393 enum dlm_lockres_list {
394 DLM_GRANTED_LIST = 0,
399 static inline int dlm_lvb_is_empty(char *lvb)
402 for (i=0; i<DLM_LVB_LEN; i++)
408 static inline struct list_head *
409 dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
411 struct list_head *ret = NULL;
412 if (idx == DLM_GRANTED_LIST)
414 else if (idx == DLM_CONVERTING_LIST)
415 ret = &res->converting;
416 else if (idx == DLM_BLOCKED_LIST)
428 unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
434 DLM_MASTER_REQUEST_MSG = 500,
435 DLM_UNUSED_MSG1, /* 501 */
436 DLM_ASSERT_MASTER_MSG, /* 502 */
437 DLM_CREATE_LOCK_MSG, /* 503 */
438 DLM_CONVERT_LOCK_MSG, /* 504 */
439 DLM_PROXY_AST_MSG, /* 505 */
440 DLM_UNLOCK_LOCK_MSG, /* 506 */
441 DLM_DEREF_LOCKRES_MSG, /* 507 */
442 DLM_MIGRATE_REQUEST_MSG, /* 508 */
443 DLM_MIG_LOCKRES_MSG, /* 509 */
444 DLM_QUERY_JOIN_MSG, /* 510 */
445 DLM_ASSERT_JOINED_MSG, /* 511 */
446 DLM_CANCEL_JOIN_MSG, /* 512 */
447 DLM_EXIT_DOMAIN_MSG, /* 513 */
448 DLM_MASTER_REQUERY_MSG, /* 514 */
449 DLM_LOCK_REQUEST_MSG, /* 515 */
450 DLM_RECO_DATA_DONE_MSG, /* 516 */
451 DLM_BEGIN_RECO_MSG, /* 517 */
452 DLM_FINALIZE_RECO_MSG /* 518 */
455 struct dlm_reco_node_data
459 struct list_head list;
463 DLM_RECO_NODE_DATA_DEAD = -1,
464 DLM_RECO_NODE_DATA_INIT = 0,
465 DLM_RECO_NODE_DATA_REQUESTING,
466 DLM_RECO_NODE_DATA_REQUESTED,
467 DLM_RECO_NODE_DATA_RECEIVING,
468 DLM_RECO_NODE_DATA_DONE,
469 DLM_RECO_NODE_DATA_FINALIZE_SENT,
474 DLM_MASTER_RESP_NO = 0,
476 DLM_MASTER_RESP_MAYBE,
477 DLM_MASTER_RESP_ERROR
481 struct dlm_master_request
488 u8 name[O2NM_MAX_NAME_LEN];
491 #define DLM_ASSERT_RESPONSE_REASSERT 0x00000001
492 #define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002
494 #define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
495 #define DLM_ASSERT_MASTER_REQUERY 0x00000002
496 #define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
497 struct dlm_assert_master
504 u8 name[O2NM_MAX_NAME_LEN];
507 #define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001
509 struct dlm_migrate_request
516 u8 name[O2NM_MAX_NAME_LEN];
519 struct dlm_master_requery
526 u8 name[O2NM_MAX_NAME_LEN];
529 #define DLM_MRES_RECOVERY 0x01
530 #define DLM_MRES_MIGRATION 0x02
531 #define DLM_MRES_ALL_DONE 0x04
534 * We would like to get one whole lockres into a single network
535 * message whenever possible. Generally speaking, there will be
536 * at most one dlm_lock on a lockres for each node in the cluster,
537 * plus (infrequently) any additional locks coming in from userdlm.
539 * struct _dlm_lockres_page
541 * dlm_migratable_lockres mres;
542 * dlm_migratable_lock ml[DLM_MAX_MIGRATABLE_LOCKS];
543 * u8 pad[DLM_MIG_LOCKRES_RESERVED];
546 * from ../cluster/tcp.h
547 * NET_MAX_PAYLOAD_BYTES (4096 - sizeof(net_msg))
548 * (roughly 4080 bytes)
549 * and sizeof(dlm_migratable_lockres) = 112 bytes
550 * and sizeof(dlm_migratable_lock) = 16 bytes
552 * Choosing DLM_MAX_MIGRATABLE_LOCKS=240 and
553 * DLM_MIG_LOCKRES_RESERVED=128 means we have this:
555 * (DLM_MAX_MIGRATABLE_LOCKS * sizeof(dlm_migratable_lock)) +
556 * sizeof(dlm_migratable_lockres) + DLM_MIG_LOCKRES_RESERVED =
557 * NET_MAX_PAYLOAD_BYTES
558 * (240 * 16) + 112 + 128 = 4080
560 * So a lockres would need more than 240 locks before it would
561 * use more than one network packet to recover. Not too bad.
563 #define DLM_MAX_MIGRATABLE_LOCKS 240
565 struct dlm_migratable_lockres
569 u8 num_locks; // locks sent in this structure
571 __be32 total_locks; // locks to be sent for this migration cookie
572 __be64 mig_cookie; // cookie for this lockres migration
573 // or zero if not needed
575 u8 lockname[DLM_LOCKID_NAME_MAX];
579 struct dlm_migratable_lock ml[0]; // 16 bytes each, begins at byte 112
581 #define DLM_MIG_LOCKRES_MAX_LEN \
582 (sizeof(struct dlm_migratable_lockres) + \
583 (sizeof(struct dlm_migratable_lock) * \
584 DLM_MAX_MIGRATABLE_LOCKS) )
586 /* from above, 128 bytes
587 * for some undetermined future use */
588 #define DLM_MIG_LOCKRES_RESERVED (NET_MAX_PAYLOAD_BYTES - \
589 DLM_MIG_LOCKRES_MAX_LEN)
591 struct dlm_create_lock
601 u8 name[O2NM_MAX_NAME_LEN];
604 struct dlm_convert_lock
614 u8 name[O2NM_MAX_NAME_LEN];
618 #define DLM_CONVERT_LOCK_MAX_LEN (sizeof(struct dlm_convert_lock)+DLM_LVB_LEN)
620 struct dlm_unlock_lock
629 u8 name[O2NM_MAX_NAME_LEN];
633 #define DLM_UNLOCK_LOCK_MAX_LEN (sizeof(struct dlm_unlock_lock)+DLM_LVB_LEN)
645 u8 name[O2NM_MAX_NAME_LEN];
649 #define DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
651 #define DLM_MOD_KEY (0x666c6172)
652 enum dlm_query_join_response_code {
656 JOIN_PROTOCOL_MISMATCH,
659 struct dlm_query_join_packet {
660 u8 code; /* Response code. dlm_minor and fs_minor
661 are only valid if this is JOIN_OK */
662 u8 dlm_minor; /* The minor version of the protocol the
664 u8 fs_minor; /* The minor version of the protocol the
665 filesystem is speaking. */
669 union dlm_query_join_response {
671 struct dlm_query_join_packet packet;
674 struct dlm_lock_request
682 struct dlm_reco_data_done
690 /* eventually we can use this to attempt
691 * lvb recovery based on each node's info */
692 u8 reco_lvb[DLM_LVB_LEN];
695 struct dlm_begin_reco
704 #define BITS_PER_BYTE 8
705 #define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE)
707 struct dlm_query_join_request
712 struct dlm_protocol_version dlm_proto;
713 struct dlm_protocol_version fs_proto;
714 u8 domain[O2NM_MAX_NAME_LEN];
715 u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)];
718 struct dlm_assert_joined
723 u8 domain[O2NM_MAX_NAME_LEN];
726 struct dlm_cancel_join
731 u8 domain[O2NM_MAX_NAME_LEN];
734 struct dlm_exit_domain
740 struct dlm_finalize_reco
749 struct dlm_deref_lockres
756 u8 name[O2NM_MAX_NAME_LEN];
759 static inline enum dlm_status
760 __dlm_lockres_state_to_status(struct dlm_lock_resource *res)
762 enum dlm_status status = DLM_NORMAL;
764 assert_spin_locked(&res->spinlock);
766 if (res->state & DLM_LOCK_RES_RECOVERING)
767 status = DLM_RECOVERING;
768 else if (res->state & DLM_LOCK_RES_MIGRATING)
769 status = DLM_MIGRATING;
770 else if (res->state & DLM_LOCK_RES_IN_PROGRESS)
771 status = DLM_FORWARD;
776 static inline u8 dlm_get_lock_cookie_node(u64 cookie)
780 ret = (u8)(cookie & 0xffULL);
784 static inline unsigned long long dlm_get_lock_cookie_seq(u64 cookie)
786 unsigned long long ret;
787 ret = ((unsigned long long)cookie) & 0x00ffffffffffffffULL;
791 struct dlm_lock * dlm_new_lock(int type, u8 node, u64 cookie,
792 struct dlm_lockstatus *lksb);
793 void dlm_lock_get(struct dlm_lock *lock);
794 void dlm_lock_put(struct dlm_lock *lock);
796 void dlm_lock_attach_lockres(struct dlm_lock *lock,
797 struct dlm_lock_resource *res);
799 int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data,
801 int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
803 int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data,
806 void dlm_revert_pending_convert(struct dlm_lock_resource *res,
807 struct dlm_lock *lock);
808 void dlm_revert_pending_lock(struct dlm_lock_resource *res,
809 struct dlm_lock *lock);
811 int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data,
813 void dlm_commit_pending_cancel(struct dlm_lock_resource *res,
814 struct dlm_lock *lock);
815 void dlm_commit_pending_unlock(struct dlm_lock_resource *res,
816 struct dlm_lock *lock);
818 int dlm_launch_thread(struct dlm_ctxt *dlm);
819 void dlm_complete_thread(struct dlm_ctxt *dlm);
820 int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
821 void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
822 void dlm_wait_for_recovery(struct dlm_ctxt *dlm);
823 void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
824 int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node);
825 int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
826 int dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout);
828 void dlm_put(struct dlm_ctxt *dlm);
829 struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm);
830 int dlm_domain_fully_joined(struct dlm_ctxt *dlm);
832 void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
833 struct dlm_lock_resource *res);
834 void dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
835 struct dlm_lock_resource *res);
836 static inline void dlm_lockres_get(struct dlm_lock_resource *res)
838 /* This is called on every lookup, so it might be worth
840 kref_get(&res->refs);
842 void dlm_lockres_put(struct dlm_lock_resource *res);
843 void __dlm_unhash_lockres(struct dlm_lock_resource *res);
844 void __dlm_insert_lockres(struct dlm_ctxt *dlm,
845 struct dlm_lock_resource *res);
846 struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm,
850 struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
854 struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
858 int dlm_is_host_down(int errno);
859 void dlm_change_lockres_owner(struct dlm_ctxt *dlm,
860 struct dlm_lock_resource *res,
862 struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
866 struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
868 unsigned int namelen);
870 #define dlm_lockres_set_refmap_bit(bit,res) \
871 __dlm_lockres_set_refmap_bit(bit,res,__FILE__,__LINE__)
872 #define dlm_lockres_clear_refmap_bit(bit,res) \
873 __dlm_lockres_clear_refmap_bit(bit,res,__FILE__,__LINE__)
875 static inline void __dlm_lockres_set_refmap_bit(int bit,
876 struct dlm_lock_resource *res,
880 //printk("%s:%d:%.*s: setting bit %d\n", file, line,
881 // res->lockname.len, res->lockname.name, bit);
882 set_bit(bit, res->refmap);
885 static inline void __dlm_lockres_clear_refmap_bit(int bit,
886 struct dlm_lock_resource *res,
890 //printk("%s:%d:%.*s: clearing bit %d\n", file, line,
891 // res->lockname.len, res->lockname.name, bit);
892 clear_bit(bit, res->refmap);
895 void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,
896 struct dlm_lock_resource *res,
899 void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,
900 struct dlm_lock_resource *res,
904 #define dlm_lockres_drop_inflight_ref(d,r) \
905 __dlm_lockres_drop_inflight_ref(d,r,__FILE__,__LINE__)
906 #define dlm_lockres_grab_inflight_ref(d,r) \
907 __dlm_lockres_grab_inflight_ref(d,r,0,__FILE__,__LINE__)
908 #define dlm_lockres_grab_inflight_ref_new(d,r) \
909 __dlm_lockres_grab_inflight_ref(d,r,1,__FILE__,__LINE__)
911 void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
912 void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
913 void dlm_do_local_ast(struct dlm_ctxt *dlm,
914 struct dlm_lock_resource *res,
915 struct dlm_lock *lock);
916 int dlm_do_remote_ast(struct dlm_ctxt *dlm,
917 struct dlm_lock_resource *res,
918 struct dlm_lock *lock);
919 void dlm_do_local_bast(struct dlm_ctxt *dlm,
920 struct dlm_lock_resource *res,
921 struct dlm_lock *lock,
923 int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm,
924 struct dlm_lock_resource *res,
925 struct dlm_lock *lock,
927 int blocked_type, int flags);
928 static inline int dlm_send_proxy_bast(struct dlm_ctxt *dlm,
929 struct dlm_lock_resource *res,
930 struct dlm_lock *lock,
933 return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_BAST,
937 static inline int dlm_send_proxy_ast(struct dlm_ctxt *dlm,
938 struct dlm_lock_resource *res,
939 struct dlm_lock *lock,
942 return dlm_send_proxy_ast_msg(dlm, res, lock, DLM_AST,
946 void dlm_print_one_lock_resource(struct dlm_lock_resource *res);
947 void __dlm_print_one_lock_resource(struct dlm_lock_resource *res);
949 u8 dlm_nm_this_node(struct dlm_ctxt *dlm);
950 void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
951 void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
954 int dlm_nm_init(struct dlm_ctxt *dlm);
955 int dlm_heartbeat_init(struct dlm_ctxt *dlm);
956 void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data);
957 void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data);
959 int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
960 int dlm_finish_migration(struct dlm_ctxt *dlm,
961 struct dlm_lock_resource *res,
963 void dlm_lockres_release_ast(struct dlm_ctxt *dlm,
964 struct dlm_lock_resource *res);
965 void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res);
967 int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data,
969 int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
971 void dlm_assert_master_post_handler(int status, void *data, void *ret_data);
972 int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
974 int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data,
976 int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
978 int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
980 int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data,
982 int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
984 int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
986 int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data,
988 int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
989 u8 nodenum, u8 *real_master);
992 int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
993 struct dlm_lock_resource *res,
999 int dlm_send_one_lockres(struct dlm_ctxt *dlm,
1000 struct dlm_lock_resource *res,
1001 struct dlm_migratable_lockres *mres,
1004 void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
1005 struct dlm_lock_resource *res);
1007 /* will exit holding res->spinlock, but may drop in function */
1008 void __dlm_wait_on_lockres_flags(struct dlm_lock_resource *res, int flags);
1009 void __dlm_wait_on_lockres_flags_set(struct dlm_lock_resource *res, int flags);
1011 /* will exit holding res->spinlock, but may drop in function */
1012 static inline void __dlm_wait_on_lockres(struct dlm_lock_resource *res)
1014 __dlm_wait_on_lockres_flags(res, (DLM_LOCK_RES_IN_PROGRESS|
1015 DLM_LOCK_RES_RECOVERING|
1016 DLM_LOCK_RES_MIGRATING));
1019 void __dlm_unlink_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle);
1020 void __dlm_insert_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle);
1022 /* create/destroy slab caches */
1023 int dlm_init_master_caches(void);
1024 void dlm_destroy_master_caches(void);
1026 int dlm_init_lock_cache(void);
1027 void dlm_destroy_lock_cache(void);
1029 int dlm_init_mle_cache(void);
1030 void dlm_destroy_mle_cache(void);
1032 void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up);
1033 int dlm_drop_lockres_ref(struct dlm_ctxt *dlm,
1034 struct dlm_lock_resource *res);
1035 void dlm_clean_master_list(struct dlm_ctxt *dlm,
1037 int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock);
1038 int __dlm_lockres_has_locks(struct dlm_lock_resource *res);
1039 int __dlm_lockres_unused(struct dlm_lock_resource *res);
1041 static inline const char * dlm_lock_mode_name(int mode)
1055 static inline int dlm_lock_compatible(int existing, int request)
1057 /* NO_LOCK compatible with all */
1058 if (request == LKM_NLMODE ||
1059 existing == LKM_NLMODE)
1062 /* EX incompatible with all non-NO_LOCK */
1063 if (request == LKM_EXMODE)
1066 /* request must be PR, which is compatible with PR */
1067 if (existing == LKM_PRMODE)
1073 static inline int dlm_lock_on_list(struct list_head *head,
1074 struct dlm_lock *lock)
1076 struct list_head *iter;
1077 struct dlm_lock *tmplock;
1079 list_for_each(iter, head) {
1080 tmplock = list_entry(iter, struct dlm_lock, list);
1081 if (tmplock == lock)
1088 static inline enum dlm_status dlm_err_to_dlm_status(int err)
1090 enum dlm_status ret;
1093 else if (err == -ETIMEDOUT || o2net_link_down(err, NULL))
1094 ret = DLM_NOLOCKMGR;
1095 else if (err == -EINVAL)
1097 else if (err == -ENAMETOOLONG)
1105 static inline void dlm_node_iter_init(unsigned long *map,
1106 struct dlm_node_iter *iter)
1108 memcpy(iter->node_map, map, sizeof(iter->node_map));
1112 static inline int dlm_node_iter_next(struct dlm_node_iter *iter)
1115 bit = find_next_bit(iter->node_map, O2NM_MAX_NODES, iter->curnode+1);
1116 if (bit >= O2NM_MAX_NODES) {
1117 iter->curnode = O2NM_MAX_NODES;
1120 iter->curnode = bit;
1126 #endif /* DLMCOMMON_H */