diff options
| author | Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2020-11-20 21:22:32 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-12-17 19:30:45 +0100 |
| commit | 9bd23c31f392bda88618008f27fd52ee9e0fac38 (patch) | |
| tree | f49df76debd74e9dac011a19cc59e0668b5247c5 /include | |
| parent | ext4: make fast_commit.h byte identical with e2fsprogs/fast_commit.h (diff) | |
| download | linux-9bd23c31f392bda88618008f27fd52ee9e0fac38.tar.xz linux-9bd23c31f392bda88618008f27fd52ee9e0fac38.zip | |
jbd2: add a helper to find out number of fast commit blocks
Add a helper to read number of fast commit blocks from jbd2 superblock
and also rename the JBD2_MIN_FC_BLKS to
JBD2_DEFAULT_FAST_COMMIT_BLOCKS since this constant is just the
default number of fast commit blocks to use in case number of fast
commit blocks isn't set in jbd2 superblock.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201120202232.2240293-2-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/jbd2.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index d2a4860feb72..99d3cd051ac3 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -68,7 +68,7 @@ extern void *jbd2_alloc(size_t size, gfp_t flags); extern void jbd2_free(void *ptr, size_t size); #define JBD2_MIN_JOURNAL_BLOCKS 1024 -#define JBD2_MIN_FC_BLOCKS 256 +#define JBD2_DEFAULT_FAST_COMMIT_BLOCKS 256 #ifdef __KERNEL__ @@ -1692,6 +1692,13 @@ static inline int jbd2_journal_has_csum_v2or3(journal_t *journal) return journal->j_chksum_driver != NULL; } +static inline int jbd2_journal_get_num_fc_blks(journal_superblock_t *jsb) +{ + int num_fc_blocks = be32_to_cpu(jsb->s_num_fc_blks); + + return num_fc_blocks ? num_fc_blocks : JBD2_DEFAULT_FAST_COMMIT_BLOCKS; +} + /* * Return number of free blocks in the log. Must be called under j_state_lock. */ |