1 #ifndef _LINUX_JBD_STATE_H
2 #define _LINUX_JBD_STATE_H
3
4 enum 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9 BH_Revoked, /* Has been revoked from the log */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
BUFFER_FNS(JBD,jbd)18 BUFFER_FNS(JBD, jbd)
19 BUFFER_FNS(JWrite, jwrite)
20 BUFFER_FNS(JBDDirty, jbddirty)
21 TAS_BUFFER_FNS(JBDDirty, jbddirty)
22 BUFFER_FNS(Revoked, revoked)
23 TAS_BUFFER_FNS(Revoked, revoked)
24 BUFFER_FNS(RevokeValid, revokevalid)
25 TAS_BUFFER_FNS(RevokeValid, revokevalid)
26 BUFFER_FNS(Freed, freed)
27
28 static inline struct buffer_head *jh2bh(struct journal_head *jh)
29 {
30 return jh->b_bh;
31 }
32
bh2jh(struct buffer_head * bh)33 static inline struct journal_head *bh2jh(struct buffer_head *bh)
34 {
35 return bh->b_private;
36 }
37
jbd_lock_bh_state(struct buffer_head * bh)38 static inline void jbd_lock_bh_state(struct buffer_head *bh)
39 {
40 bit_spin_lock(BH_State, &bh->b_state);
41 }
42
jbd_trylock_bh_state(struct buffer_head * bh)43 static inline int jbd_trylock_bh_state(struct buffer_head *bh)
44 {
45 return bit_spin_trylock(BH_State, &bh->b_state);
46 }
47
jbd_is_locked_bh_state(struct buffer_head * bh)48 static 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
jbd_unlock_bh_state(struct buffer_head * bh)53 static inline void jbd_unlock_bh_state(struct buffer_head *bh)
54 {
55 bit_spin_unlock(BH_State, &bh->b_state);
56 }
57
jbd_lock_bh_journal_head(struct buffer_head * bh)58 static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
59 {
60 bit_spin_lock(BH_JournalHead, &bh->b_state);
61 }
62
jbd_unlock_bh_journal_head(struct buffer_head * bh)63 static 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