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BH_JWrite, /* Being written to log (@@@ DEBUGGING) */ 8 BH_Freed, /* Has been freed (truncated) */ 9 BH_Revoked, /* Has been revoked from the log */ 10 BH_RevokeValid, /* Revoked flag is valid */ 11 BH_JBDDirty, /* Is dirty but journaled */ 12 BH_State, /* Pins most journal_head state */ 13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