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jbd: Provide function to check whether transaction will issue data barrier

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Provide a function which returns whether a transaction with given tid
will send a barrier to the filesystem device. The function will be used
by ext3 to detect whether fsync needs to send a separate barrier or not.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2010-04-15 22:16:24 +02:00
parent 311b9549ed
commit 03f4d804a1
3 changed files with 42 additions and 2 deletions
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3
include/linux/jbd.h
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@@ -427,9 +427,9 @@ struct transaction_s
enum {
T_RUNNING,
T_LOCKED,
T_RUNDOWN,
T_FLUSH,
T_COMMIT,
T_COMMIT_RECORD,
T_FINISHED
} t_state;
@@ -991,6 +991,7 @@ int journal_start_commit(journal_t *journal, tid_t *tid);
int journal_force_commit_nested(journal_t *journal);
int log_wait_commit(journal_t *journal, tid_t tid);
int log_do_checkpoint(journal_t *journal);
int journal_trans_will_send_data_barrier(journal_t *journal, tid_t tid);
void __log_wait_for_space(journal_t *journal);
extern void __journal_drop_transaction(journal_t *, transaction_t *);