2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #ifndef LOCK_DLM_DOT_H
11 #define LOCK_DLM_DOT_H
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/spinlock.h>
16 #include <linux/types.h>
17 #include <linux/string.h>
18 #include <linux/list.h>
19 #include <linux/socket.h>
20 #include <linux/delay.h>
21 #include <linux/kthread.h>
22 #include <linux/kobject.h>
23 #include <linux/fcntl.h>
24 #include <linux/wait.h>
27 #include <linux/dlm.h>
28 #include <linux/lm_interface.h>
31 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
32 * prefix of lock_dlm_ gets awkward. Externally, GFS refers to this module
36 #define GDLM_STRNAME_BYTES 24
37 #define GDLM_LVB_SIZE 32
38 #define GDLM_DROP_COUNT 0
39 #define GDLM_DROP_PERIOD 60
40 #define GDLM_NAME_LEN 128
42 /* GFS uses 12 bytes to identify a resource (32 bit type + 64 bit number).
43 We sprintf these numbers into a 24 byte string of hex values to make them
44 human-readable (to make debugging simpler.) */
47 unsigned char name[GDLM_STRNAME_BYTES];
48 unsigned short namelen;
64 char clustername[GDLM_NAME_LEN];
65 char fsname[GDLM_NAME_LEN];
67 dlm_lockspace_t *dlm_lockspace;
72 int recover_jid_status;
73 spinlock_t async_lock;
74 struct list_head complete;
75 struct list_head blocking;
76 struct list_head delayed;
77 struct list_head submit;
78 struct list_head all_locks;
80 wait_queue_head_t wait_control;
81 struct task_struct *thread1;
82 struct task_struct *thread2;
83 wait_queue_head_t thread_wait;
84 unsigned long drop_time;
86 int drop_locks_period;
95 LFL_FORCE_PROMOTE = 5,
102 LFL_UNLOCK_DELETE = 12,
108 struct lm_lockname lockname;
109 struct gdlm_strname strname;
111 struct dlm_lksb lksb;
116 u32 lkf; /* dlm flags DLM_LKF_ */
117 unsigned long flags; /* lock_dlm flags LFL_ */
119 int bast_mode; /* protected by async_lock */
121 struct list_head clist; /* complete */
122 struct list_head blist; /* blocking */
123 struct list_head delay_list; /* delayed */
124 struct list_head all_list; /* all locks for the fs */
125 struct gdlm_lock *hold_null; /* NL lock for hold_lvb */
128 #define gdlm_assert(assertion, fmt, args...) \
130 if (unlikely(!(assertion))) { \
131 printk(KERN_EMERG "lock_dlm: fatal assertion failed \"%s\"\n" \
132 "lock_dlm: " fmt "\n", \
133 #assertion, ##args); \
138 #define log_print(lev, fmt, arg...) printk(lev "lock_dlm: " fmt "\n" , ## arg)
139 #define log_info(fmt, arg...) log_print(KERN_INFO , fmt , ## arg)
140 #define log_error(fmt, arg...) log_print(KERN_ERR , fmt , ## arg)
141 #ifdef LOCK_DLM_LOG_DEBUG
142 #define log_debug(fmt, arg...) log_print(KERN_DEBUG , fmt , ## arg)
144 #define log_debug(fmt, arg...)
149 int gdlm_sysfs_init(void);
150 void gdlm_sysfs_exit(void);
151 int gdlm_kobject_setup(struct gdlm_ls *, struct kobject *);
152 void gdlm_kobject_release(struct gdlm_ls *);
156 int gdlm_init_threads(struct gdlm_ls *);
157 void gdlm_release_threads(struct gdlm_ls *);
161 s16 gdlm_make_lmstate(s16);
162 void gdlm_queue_delayed(struct gdlm_lock *);
163 void gdlm_submit_delayed(struct gdlm_ls *);
164 int gdlm_release_all_locks(struct gdlm_ls *);
165 void gdlm_delete_lp(struct gdlm_lock *);
166 unsigned int gdlm_do_lock(struct gdlm_lock *);
168 int gdlm_get_lock(void *, struct lm_lockname *, void **);
169 void gdlm_put_lock(void *);
170 unsigned int gdlm_lock(void *, unsigned int, unsigned int, unsigned int);
171 unsigned int gdlm_unlock(void *, unsigned int);
172 void gdlm_cancel(void *);
173 int gdlm_hold_lvb(void *, char **);
174 void gdlm_unhold_lvb(void *, char *);
178 int gdlm_plock_init(void);
179 void gdlm_plock_exit(void);
180 int gdlm_plock(void *, struct lm_lockname *, struct file *, int,
182 int gdlm_plock_get(void *, struct lm_lockname *, struct file *,
184 int gdlm_punlock(void *, struct lm_lockname *, struct file *,