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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-01-08 23:38:23 -0800 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-01-08 23:38:23 -0800 |
commit | da733563be5a9da26fe81d9f007262d00b846e22 (patch) | |
tree | db28291df94a2043af2123911984c5c173da4e6f /include/linux/jbd_common.h | |
parent | 6ccbcf2cb41131f8d56ef0723bf3f7c1f8486076 (diff) | |
parent | dab78d7924598ea4031663dd10db814e2e324928 (diff) | |
download | lwn-da733563be5a9da26fe81d9f007262d00b846e22.tar.gz lwn-da733563be5a9da26fe81d9f007262d00b846e22.zip |
Merge branch 'next' into for-linus
Diffstat (limited to 'include/linux/jbd_common.h')
-rw-r--r-- | include/linux/jbd_common.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/jbd_common.h b/include/linux/jbd_common.h new file mode 100644 index 000000000000..6230f8556a4e --- /dev/null +++ b/include/linux/jbd_common.h @@ -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BH_JWrite, /* Being written to log (@@@ DEBUGGING) */ + BH_Freed, /* Has been freed (truncated) */ + BH_Revoked, /* Has been revoked from the log */ + BH_RevokeValid, /* Revoked flag is valid */ + BH_JBDDirty, /* Is dirty but journaled */ + BH_State, /* Pins most journal_head state */ +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) + +static inline struct buffer_head *jh2bh(struct journal_head *jh) +{ + return jh->b_bh; +} + +static inline struct journal_head *bh2jh(struct buffer_head *bh) +{ + return bh->b_private; +} + +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); +} + +static inline int jbd_is_locked_bh_state(struct buffer_head *bh) +{ + return bit_spin_is_locked(BH_State, &bh->b_state); +} + +static inline void jbd_unlock_bh_state(struct buffer_head *bh) +{ + bit_spin_unlock(BH_State, &bh->b_state); +} + +static inline void jbd_lock_bh_journal_head(struct buffer_head *bh) +{ + bit_spin_lock(BH_JournalHead, &bh->b_state); +} + +static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) +{ + bit_spin_unlock(BH_JournalHead, &bh->b_state); +} + +#endif |