aboutsummaryrefslogtreecommitdiffstats
path: root/fs/gfs2/locking/dlm/lock_dlm.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/gfs2/locking/dlm/lock_dlm.h')
-rw-r--r--fs/gfs2/locking/dlm/lock_dlm.h187
1 files changed, 187 insertions, 0 deletions
diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
new file mode 100644
index 000000000000..33af707a4d3f
--- /dev/null
+++ b/fs/gfs2/locking/dlm/lock_dlm.h
@@ -0,0 +1,187 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
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.
8 */
9
10#ifndef LOCK_DLM_DOT_H
11#define LOCK_DLM_DOT_H
12
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/spinlock.h>
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/string.h>
19#include <linux/list.h>
20#include <linux/socket.h>
21#include <linux/delay.h>
22#include <linux/kthread.h>
23#include <linux/kobject.h>
24#include <linux/fcntl.h>
25#include <linux/wait.h>
26#include <net/sock.h>
27
28#include <linux/dlm.h>
29#include <linux/lm_interface.h>
30
31/*
32 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
33 * prefix of lock_dlm_ gets awkward. Externally, GFS refers to this module
34 * as "lock_dlm".
35 */
36
37#define GDLM_STRNAME_BYTES 24
38#define GDLM_LVB_SIZE 32
39#define GDLM_DROP_COUNT 50000
40#define GDLM_DROP_PERIOD 60
41#define GDLM_NAME_LEN 128
42
43/* GFS uses 12 bytes to identify a resource (32 bit type + 64 bit number).
44 We sprintf these numbers into a 24 byte string of hex values to make them
45 human-readable (to make debugging simpler.) */
46
47struct gdlm_strname {
48 unsigned char name[GDLM_STRNAME_BYTES];
49 unsigned short namelen;
50};
51
52enum {
53 DFL_BLOCK_LOCKS = 0,
54 DFL_SPECTATOR = 1,
55 DFL_WITHDRAW = 2,
56};
57
58struct gdlm_ls {
59 u32 id;
60 int jid;
61 int first;
62 int first_done;
63 unsigned long flags;
64 struct kobject kobj;
65 char clustername[GDLM_NAME_LEN];
66 char fsname[GDLM_NAME_LEN];
67 int fsflags;
68 dlm_lockspace_t *dlm_lockspace;
69 lm_callback_t fscb;
70 struct gfs2_sbd *sdp;
71 int recover_jid;
72 int recover_jid_done;
73 int recover_jid_status;
74 spinlock_t async_lock;
75 struct list_head complete;
76 struct list_head blocking;
77 struct list_head delayed;
78 struct list_head submit;
79 struct list_head all_locks;
80 u32 all_locks_count;
81 wait_queue_head_t wait_control;
82 struct task_struct *thread1;
83 struct task_struct *thread2;
84 wait_queue_head_t thread_wait;
85 unsigned long drop_time;
86 int drop_locks_count;
87 int drop_locks_period;
88};
89
90enum {
91 LFL_NOBLOCK = 0,
92 LFL_NOCACHE = 1,
93 LFL_DLM_UNLOCK = 2,
94 LFL_DLM_CANCEL = 3,
95 LFL_SYNC_LVB = 4,
96 LFL_FORCE_PROMOTE = 5,
97 LFL_REREQUEST = 6,
98 LFL_ACTIVE = 7,
99 LFL_INLOCK = 8,
100 LFL_CANCEL = 9,
101 LFL_NOBAST = 10,
102 LFL_HEADQUE = 11,
103 LFL_UNLOCK_DELETE = 12,
104};
105
106struct gdlm_lock {
107 struct gdlm_ls *ls;
108 struct lm_lockname lockname;
109 char *lvb;
110 struct dlm_lksb lksb;
111
112 s16 cur;
113 s16 req;
114 s16 prev_req;
115 u32 lkf; /* dlm flags DLM_LKF_ */
116 unsigned long flags; /* lock_dlm flags LFL_ */
117
118 int bast_mode; /* protected by async_lock */
119 struct completion ast_wait;
120
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 */
126};
127
128#define gdlm_assert(assertion, fmt, args...) \
129do { \
130 if (unlikely(!(assertion))) { \
131 printk(KERN_EMERG "lock_dlm: fatal assertion failed \"%s\"\n" \
132 "lock_dlm: " fmt "\n", \
133 #assertion, ##args); \
134 BUG(); \
135 } \
136} while (0)
137
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)
143#else
144#define log_debug(fmt, arg...)
145#endif
146
147/* sysfs.c */
148
149int gdlm_sysfs_init(void);
150void gdlm_sysfs_exit(void);
151int gdlm_kobject_setup(struct gdlm_ls *, struct kobject *);
152void gdlm_kobject_release(struct gdlm_ls *);
153
154/* thread.c */
155
156int gdlm_init_threads(struct gdlm_ls *);
157void gdlm_release_threads(struct gdlm_ls *);
158
159/* lock.c */
160
161s16 gdlm_make_lmstate(s16);
162void gdlm_queue_delayed(struct gdlm_lock *);
163void gdlm_submit_delayed(struct gdlm_ls *);
164int gdlm_release_all_locks(struct gdlm_ls *);
165void gdlm_delete_lp(struct gdlm_lock *);
166unsigned int gdlm_do_lock(struct gdlm_lock *);
167
168int gdlm_get_lock(void *, struct lm_lockname *, void **);
169void gdlm_put_lock(void *);
170unsigned int gdlm_lock(void *, unsigned int, unsigned int, unsigned int);
171unsigned int gdlm_unlock(void *, unsigned int);
172void gdlm_cancel(void *);
173int gdlm_hold_lvb(void *, char **);
174void gdlm_unhold_lvb(void *, char *);
175
176/* plock.c */
177
178int gdlm_plock_init(void);
179void gdlm_plock_exit(void);
180int gdlm_plock(void *, struct lm_lockname *, struct file *, int,
181 struct file_lock *);
182int gdlm_plock_get(void *, struct lm_lockname *, struct file *,
183 struct file_lock *);
184int gdlm_punlock(void *, struct lm_lockname *, struct file *,
185 struct file_lock *);
186#endif
187
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-13 21:12:09 -0500