1#ifndef _LINUX_JBD_STATE_H
2#define _LINUX_JBD_STATE_H
3
4enum jbd_state_bits {
5	BH_JBD			/* Has an attached ext3 journal_head */
6	  = BH_PrivateStart,
7	BH_JWrite,		/* Being written to log (@@@ DEBUGGING) */
8	BH_Freed,		/* Has been freed (truncated) */
9	BH_Revoked,		/* Has been revoked from the log */
10	BH_RevokeValid,		/* Revoked flag is valid */
11	BH_JBDDirty,		/* Is dirty but journaled */
12	BH_State,		/* Pins most journal_head state */
13	BH_JournalHead,		/* Pins bh->b_private and jh->b_bh */
14	BH_Unshadow,		/* Dummy bit, for BJ_Shadow wakeup filtering */
15	BH_JBDPrivateStart,	/* First bit available for private use by FS */
16};
17
18BUFFER_FNS(JBD, jbd)
19BUFFER_FNS(JWrite, jwrite)
20BUFFER_FNS(JBDDirty, jbddirty)
21TAS_BUFFER_FNS(JBDDirty, jbddirty)
22BUFFER_FNS(Revoked, revoked)
23TAS_BUFFER_FNS(Revoked, revoked)
24BUFFER_FNS(RevokeValid, revokevalid)
25TAS_BUFFER_FNS(RevokeValid, revokevalid)
26BUFFER_FNS(Freed, freed)
27
28static inline struct buffer_head *jh2bh(struct journal_head *jh)
29{
30	return jh->b_bh;
31}
32
33static inline struct journal_head *bh2jh(struct buffer_head *bh)
34{
35	return bh->b_private;
36}
37
38static inline void jbd_lock_bh_state(struct buffer_head *bh)
39{
40	bit_spin_lock(BH_State, &bh->b_state);
41}
42
43static inline int jbd_trylock_bh_state(struct buffer_head *bh)
44{
45	return bit_spin_trylock(BH_State, &bh->b_state);
46}
47
48static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
49{
50	return bit_spin_is_locked(BH_State, &bh->b_state);
51}
52
53static inline void jbd_unlock_bh_state(struct buffer_head *bh)
54{
55	bit_spin_unlock(BH_State, &bh->b_state);
56}
57
58static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
59{
60	bit_spin_lock(BH_JournalHead, &bh->b_state);
61}
62
63static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
64{
65	bit_spin_unlock(BH_JournalHead, &bh->b_state);
66}
67
68#endif
69