| Thomas Gleixner | 4460667 | 2011-10-27 04:38:18 -0400 | [diff] [blame] | 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| 9 | BH_Revoked, /* Has been revoked from the log */ |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 | |
| 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 | |
| 33 | static inline struct journal_head *bh2jh(struct buffer_head *bh) |
| 34 | { |
| 35 | return bh->b_private; |
| 36 | } |
| 37 | |
| 38 | static inline void jbd_lock_bh_state(struct buffer_head *bh) |
| 39 | { |
| 40 | bit_spin_lock(BH_State, &bh->b_state); |
| 41 | } |
| 42 | |
| 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 | |
| 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 | |
| 53 | static inline void jbd_unlock_bh_state(struct buffer_head *bh) |
| 54 | { |
| 55 | bit_spin_unlock(BH_State, &bh->b_state); |
| 56 | } |
| 57 | |
| 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 | |
| 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 |