mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 14:14:01 +08:00
446066724c
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>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
#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BH_Revoked, /* Has been revoked from the log */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
|