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7#ifndef __GLOCK_DOT_H__
8#define __GLOCK_DOT_H__
9
10#include <linux/sched.h>
11#include <linux/parser.h>
12#include "incore.h"
13#include "util.h"
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15
16
17enum {
18 Opt_jid,
19 Opt_id,
20 Opt_first,
21 Opt_nodir,
22 Opt_err,
23};
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28
29#define LM_TYPE_RESERVED 0x00
30#define LM_TYPE_NONDISK 0x01
31#define LM_TYPE_INODE 0x02
32#define LM_TYPE_RGRP 0x03
33#define LM_TYPE_META 0x04
34#define LM_TYPE_IOPEN 0x05
35#define LM_TYPE_FLOCK 0x06
36#define LM_TYPE_PLOCK 0x07
37#define LM_TYPE_QUOTA 0x08
38#define LM_TYPE_JOURNAL 0x09
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46
47#define LM_ST_UNLOCKED 0
48#define LM_ST_EXCLUSIVE 1
49#define LM_ST_DEFERRED 2
50#define LM_ST_SHARED 3
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80#define LM_FLAG_TRY 0x0001
81#define LM_FLAG_TRY_1CB 0x0002
82#define LM_FLAG_NOEXP 0x0004
83#define LM_FLAG_ANY 0x0008
84#define LM_FLAG_PRIORITY 0x0010
85#define GL_ASYNC 0x0040
86#define GL_EXACT 0x0080
87#define GL_SKIP 0x0100
88#define GL_NOCACHE 0x0400
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101#define LM_OUT_ST_MASK 0x00000003
102#define LM_OUT_CANCELED 0x00000008
103#define LM_OUT_ERROR 0x00000004
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108
109#define LM_RD_GAVEUP 308
110#define LM_RD_SUCCESS 309
111
112#define GLR_TRYFAILED 13
113
114#define GL_GLOCK_MAX_HOLD (long)(HZ / 5)
115#define GL_GLOCK_DFT_HOLD (long)(HZ / 5)
116#define GL_GLOCK_MIN_HOLD (long)(10)
117#define GL_GLOCK_HOLD_INCR (long)(HZ / 20)
118#define GL_GLOCK_HOLD_DECR (long)(HZ / 40)
119
120struct lm_lockops {
121 const char *lm_proto_name;
122 int (*lm_mount) (struct gfs2_sbd *sdp, const char *table);
123 void (*lm_first_done) (struct gfs2_sbd *sdp);
124 void (*lm_recovery_result) (struct gfs2_sbd *sdp, unsigned int jid,
125 unsigned int result);
126 void (*lm_unmount) (struct gfs2_sbd *sdp);
127 void (*lm_withdraw) (struct gfs2_sbd *sdp);
128 void (*lm_put_lock) (struct gfs2_glock *gl);
129 int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state,
130 unsigned int flags);
131 void (*lm_cancel) (struct gfs2_glock *gl);
132 const match_table_t *lm_tokens;
133};
134
135extern struct workqueue_struct *gfs2_delete_workqueue;
136static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
137{
138 struct gfs2_holder *gh;
139 struct pid *pid;
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141
142 spin_lock(&gl->gl_lockref.lock);
143 pid = task_pid(current);
144 list_for_each_entry(gh, &gl->gl_holders, gh_list) {
145 if (!test_bit(HIF_HOLDER, &gh->gh_iflags))
146 break;
147 if (gh->gh_owner_pid == pid)
148 goto out;
149 }
150 gh = NULL;
151out:
152 spin_unlock(&gl->gl_lockref.lock);
153
154 return gh;
155}
156
157static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
158{
159 return gl->gl_state == LM_ST_EXCLUSIVE;
160}
161
162static inline int gfs2_glock_is_held_dfrd(struct gfs2_glock *gl)
163{
164 return gl->gl_state == LM_ST_DEFERRED;
165}
166
167static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
168{
169 return gl->gl_state == LM_ST_SHARED;
170}
171
172static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl)
173{
174 if (gl->gl_ops->go_flags & GLOF_ASPACE)
175 return (struct address_space *)(gl + 1);
176 return NULL;
177}
178
179extern int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
180 const struct gfs2_glock_operations *glops,
181 int create, struct gfs2_glock **glp);
182extern void gfs2_glock_hold(struct gfs2_glock *gl);
183extern void gfs2_glock_put(struct gfs2_glock *gl);
184extern void gfs2_glock_queue_put(struct gfs2_glock *gl);
185extern void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
186 u16 flags, struct gfs2_holder *gh);
187extern void gfs2_holder_reinit(unsigned int state, u16 flags,
188 struct gfs2_holder *gh);
189extern void gfs2_holder_uninit(struct gfs2_holder *gh);
190extern int gfs2_glock_nq(struct gfs2_holder *gh);
191extern int gfs2_glock_poll(struct gfs2_holder *gh);
192extern int gfs2_glock_wait(struct gfs2_holder *gh);
193extern int gfs2_glock_async_wait(unsigned int num_gh, struct gfs2_holder *ghs);
194extern void gfs2_glock_dq(struct gfs2_holder *gh);
195extern void gfs2_glock_dq_wait(struct gfs2_holder *gh);
196extern void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
197extern int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number,
198 const struct gfs2_glock_operations *glops,
199 unsigned int state, u16 flags,
200 struct gfs2_holder *gh);
201extern int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
202extern void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
203extern void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl,
204 bool fsid);
205#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { \
206 gfs2_dump_glock(NULL, gl, true); \
207 BUG(); } } while(0)
208extern __printf(2, 3)
209void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
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221static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
222 unsigned int state, u16 flags,
223 struct gfs2_holder *gh)
224{
225 int error;
226
227 gfs2_holder_init(gl, state, flags, gh);
228
229 error = gfs2_glock_nq(gh);
230 if (error)
231 gfs2_holder_uninit(gh);
232
233 return error;
234}
235
236extern void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
237extern void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
238extern void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
239extern void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
240extern void gfs2_glock_thaw(struct gfs2_sbd *sdp);
241extern void gfs2_glock_add_to_lru(struct gfs2_glock *gl);
242extern void gfs2_glock_free(struct gfs2_glock *gl);
243
244extern int __init gfs2_glock_init(void);
245extern void gfs2_glock_exit(void);
246
247extern void gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
248extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
249extern void gfs2_register_debugfs(void);
250extern void gfs2_unregister_debugfs(void);
251
252extern const struct lm_lockops gfs2_dlm_ops;
253
254static inline void gfs2_holder_mark_uninitialized(struct gfs2_holder *gh)
255{
256 gh->gh_gl = NULL;
257}
258
259static inline bool gfs2_holder_initialized(struct gfs2_holder *gh)
260{
261 return gh->gh_gl;
262}
263
264static inline bool gfs2_holder_queued(struct gfs2_holder *gh)
265{
266 return !list_empty(&gh->gh_list);
267}
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274static inline void glock_set_object(struct gfs2_glock *gl, void *object)
275{
276 spin_lock(&gl->gl_lockref.lock);
277 if (gfs2_assert_warn(gl->gl_name.ln_sbd, gl->gl_object == NULL))
278 gfs2_dump_glock(NULL, gl, true);
279 gl->gl_object = object;
280 spin_unlock(&gl->gl_lockref.lock);
281}
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301static inline void glock_clear_object(struct gfs2_glock *gl, void *object)
302{
303 spin_lock(&gl->gl_lockref.lock);
304 if (gl->gl_object == object)
305 gl->gl_object = NULL;
306 spin_unlock(&gl->gl_lockref.lock);
307}
308
309#endif
310