Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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9 BH_Revoked, /* Has been revoked from the log */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_Verified, /* Metadata block has been verified ok */
16 BH_JBDPrivateStart, /* First bit available for private use by FS */
17};
18
19BUFFER_FNS(JBD, jbd)
20BUFFER_FNS(JWrite, jwrite)
21BUFFER_FNS(JBDDirty, jbddirty)
22TAS_BUFFER_FNS(JBDDirty, jbddirty)
23BUFFER_FNS(Revoked, revoked)
24TAS_BUFFER_FNS(Revoked, revoked)
25BUFFER_FNS(RevokeValid, revokevalid)
26TAS_BUFFER_FNS(RevokeValid, revokevalid)
27BUFFER_FNS(Freed, freed)
28BUFFER_FNS(Verified, verified)
29
30static inline struct buffer_head *jh2bh(struct journal_head *jh)
31{
32 return jh->b_bh;
33}
34
35static inline struct journal_head *bh2jh(struct buffer_head *bh)
36{
37 return bh->b_private;
38}
39
40static inline void jbd_lock_bh_state(struct buffer_head *bh)
41{
42 bit_spin_lock(BH_State, &bh->b_state);
43}
44
45static inline int jbd_trylock_bh_state(struct buffer_head *bh)
46{
47 return bit_spin_trylock(BH_State, &bh->b_state);
48}
49
50static inline int jbd_is_locked_bh_state(struct buffer_head *bh)
51{
52 return bit_spin_is_locked(BH_State, &bh->b_state);
53}
54
55static inline void jbd_unlock_bh_state(struct buffer_head *bh)
56{
57 bit_spin_unlock(BH_State, &bh->b_state);
58}
59
60static inline void jbd_lock_bh_journal_head(struct buffer_head *bh)
61{
62 bit_spin_lock(BH_JournalHead, &bh->b_state);
63}
64
65static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh)
66{
67 bit_spin_unlock(BH_JournalHead, &bh->b_state);
68}
69
70#endif