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jbd2: add fast commit machinery

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This functions adds necessary APIs needed in JBD2 layer for fast
commits.

Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201015203802.3597742-5-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar 2020-10-15 13:37:56 -07:00 • committed by Theodore Ts'o
parent 6866d7b3f2
commit ff780b91ef
4 changed files with 268 additions and 1 deletions
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27
include/linux/jbd2.h
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@ -861,6 +861,13 @@ struct journal_s
*/
wait_queue_head_t j_wait_reserved;
/**
* @j_fc_wait:
*
* Wait queue to wait for completion of async fast commits.
*/
wait_queue_head_t j_fc_wait;
/**
* @j_checkpoint_mutex:
*
@ -1232,6 +1239,15 @@ struct journal_s
*/
struct lockdep_map j_trans_commit_map;
#endif
/**
* @j_fc_cleanup_callback:
*
* Clean-up after fast commit or full commit. JBD2 calls this function
* after every commit operation.
*/
void (*j_fc_cleanup_callback)(struct journal_s *journal, int);
};
#define jbd2_might_wait_for_commit(j) \
@ -1316,6 +1332,8 @@ JBD2_FEATURE_INCOMPAT_FUNCS(fast_commit, FAST_COMMIT)
#define JBD2_ABORT_ON_SYNCDATA_ERR 0x040 /* Abort the journal on file
* data write error in ordered
* mode */
#define JBD2_FAST_COMMIT_ONGOING 0x100 /* Fast commit is ongoing */
#define JBD2_FULL_COMMIT_ONGOING 0x200 /* Full commit is ongoing */
/*
* Function declarations for the journaling transaction and buffer
@ -1574,6 +1592,15 @@ extern int jbd2_cleanup_journal_tail(journal_t *);
/* Fast commit related APIs */
int jbd2_fc_init(journal_t *journal, int num_fc_blks);
int jbd2_fc_begin_commit(journal_t *journal, tid_t tid);
int jbd2_fc_end_commit(journal_t *journal);
int jbd2_fc_end_commit_fallback(journal_t *journal, tid_t tid);
int jbd2_fc_get_buf(journal_t *journal, struct buffer_head **bh_out);
int jbd2_submit_inode_data(struct jbd2_inode *jinode);
int jbd2_wait_inode_data(journal_t *journal, struct jbd2_inode *jinode);
int jbd2_fc_wait_bufs(journal_t *journal, int num_blks);
int jbd2_fc_release_bufs(journal_t *journal);
/*
* is_journal_abort
*