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lock.h
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1 /******************************************************************************
2 *******************************************************************************
3 **
4 ** Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.
5 **
6 ** This copyrighted material is made available to anyone wishing to use,
7 ** modify, copy, or redistribute it subject to the terms and conditions
8 ** of the GNU General Public License v.2.
9 **
10 *******************************************************************************
11 ******************************************************************************/
12 
13 #ifndef __LOCK_DOT_H__
14 #define __LOCK_DOT_H__
15 
16 void dlm_dump_rsb(struct dlm_rsb *r);
17 void dlm_dump_rsb_name(struct dlm_ls *ls, char *name, int len);
18 void dlm_print_lkb(struct dlm_lkb *lkb);
19 void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms,
20  uint32_t saved_seq);
21 void dlm_receive_buffer(union dlm_packet *p, int nodeid);
22 int dlm_modes_compat(int mode1, int mode2);
23 void dlm_put_rsb(struct dlm_rsb *r);
24 void dlm_hold_rsb(struct dlm_rsb *r);
25 int dlm_put_lkb(struct dlm_lkb *lkb);
26 void dlm_scan_rsbs(struct dlm_ls *ls);
27 int dlm_lock_recovery_try(struct dlm_ls *ls);
28 void dlm_unlock_recovery(struct dlm_ls *ls);
29 void dlm_scan_waiters(struct dlm_ls *ls);
30 void dlm_scan_timeout(struct dlm_ls *ls);
31 void dlm_adjust_timeouts(struct dlm_ls *ls);
32 int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
33  unsigned int flags, int *r_nodeid, int *result);
34 
35 int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
36  struct dlm_rsb **r_ret);
37 
38 void dlm_recover_purge(struct dlm_ls *ls);
39 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
40 void dlm_recover_grant(struct dlm_ls *ls);
41 int dlm_recover_waiters_post(struct dlm_ls *ls);
42 void dlm_recover_waiters_pre(struct dlm_ls *ls);
43 int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
44 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
45 
46 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
47  uint32_t flags, void *name, unsigned int namelen,
48  unsigned long timeout_cs);
49 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
50  int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
51  unsigned long timeout_cs);
52 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
53  uint32_t flags, uint32_t lkid, char *lvb_in);
54 int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
55  uint32_t flags, uint32_t lkid);
56 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
57  int nodeid, int pid);
58 int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
59 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
60 
61 static inline int is_master(struct dlm_rsb *r)
62 {
63  return !r->res_nodeid;
64 }
65 
66 static inline void lock_rsb(struct dlm_rsb *r)
67 {
68  mutex_lock(&r->res_mutex);
69 }
70 
71 static inline void unlock_rsb(struct dlm_rsb *r)
72 {
73  mutex_unlock(&r->res_mutex);
74 }
75 
76 #endif
77 
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