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jdb/jbd2: factor out common functions from the jbd[2] header files
The state bits and the lock functions of jbd and jbd2 are identical. Share them. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Thomas Gleixner
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Theodore Ts'o
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Oct 27, 2011
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| #ifndef _LINUX_JBD_STATE_H | ||
| #define _LINUX_JBD_STATE_H | ||
|
|
||
| enum jbd_state_bits { | ||
| BH_JBD /* Has an attached ext3 journal_head */ | ||
| = BH_PrivateStart, | ||
| BH_JWrite, /* Being written to log (@@@ DEBUGGING) */ | ||
| BH_Freed, /* Has been freed (truncated) */ | ||
| BH_Revoked, /* Has been revoked from the log */ | ||
| BH_RevokeValid, /* Revoked flag is valid */ | ||
| BH_JBDDirty, /* Is dirty but journaled */ | ||
| BH_State, /* Pins most journal_head state */ | ||
| BH_JournalHead, /* Pins bh->b_private and jh->b_bh */ | ||
| BH_Unshadow, /* Dummy bit, for BJ_Shadow wakeup filtering */ | ||
| BH_JBDPrivateStart, /* First bit available for private use by FS */ | ||
| }; | ||
|
|
||
| BUFFER_FNS(JBD, jbd) | ||
| BUFFER_FNS(JWrite, jwrite) | ||
| BUFFER_FNS(JBDDirty, jbddirty) | ||
| TAS_BUFFER_FNS(JBDDirty, jbddirty) | ||
| BUFFER_FNS(Revoked, revoked) | ||
| TAS_BUFFER_FNS(Revoked, revoked) | ||
| BUFFER_FNS(RevokeValid, revokevalid) | ||
| TAS_BUFFER_FNS(RevokeValid, revokevalid) | ||
| BUFFER_FNS(Freed, freed) | ||
|
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||
| static inline struct buffer_head *jh2bh(struct journal_head *jh) | ||
| { | ||
| return jh->b_bh; | ||
| } | ||
|
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||
| static inline struct journal_head *bh2jh(struct buffer_head *bh) | ||
| { | ||
| return bh->b_private; | ||
| } | ||
|
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||
| static inline void jbd_lock_bh_state(struct buffer_head *bh) | ||
| { | ||
| bit_spin_lock(BH_State, &bh->b_state); | ||
| } | ||
|
|
||
| static inline int jbd_trylock_bh_state(struct buffer_head *bh) | ||
| { | ||
| return bit_spin_trylock(BH_State, &bh->b_state); | ||
| } | ||
|
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||
| static inline int jbd_is_locked_bh_state(struct buffer_head *bh) | ||
| { | ||
| return bit_spin_is_locked(BH_State, &bh->b_state); | ||
| } | ||
|
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||
| static inline void jbd_unlock_bh_state(struct buffer_head *bh) | ||
| { | ||
| bit_spin_unlock(BH_State, &bh->b_state); | ||
| } | ||
|
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||
| static inline void jbd_lock_bh_journal_head(struct buffer_head *bh) | ||
| { | ||
| bit_spin_lock(BH_JournalHead, &bh->b_state); | ||
| } | ||
|
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| static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) | ||
| { | ||
| bit_spin_unlock(BH_JournalHead, &bh->b_state); | ||
| } | ||
|
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||
| #endif |