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| author | Chengguang Xu <cgxu519@mykernel.net> | 2019-11-04 19:40:32 +0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-11-06 16:25:12 +0100 |
| commit | eb9e47fc230aafc3ac1e5eeae6d0d8d5e108bbae (patch) | |
| tree | e7ff628531849c3402e3045576de90fa8a8ae7e1 | |
| parent | dae82c7fd0926840c832151f3258ba751f73d348 (diff) | |
| download | linux-eb9e47fc230aafc3ac1e5eeae6d0d8d5e108bbae.tar.gz linux-eb9e47fc230aafc3ac1e5eeae6d0d8d5e108bbae.tar.bz2 linux-eb9e47fc230aafc3ac1e5eeae6d0d8d5e108bbae.zip | |
ext2: introduce new helper ext2_group_last_block_no()
Introduce new helper ext2_group_last_block_no() to calculate
last block num for specific block group, we can replace open
coded logic by calling this common helper.
Link: https://lore.kernel.org/r/20191104114036.9893-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | fs/ext2/ext2.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 10ab238de9a6..8178bd38a9d6 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -813,6 +813,18 @@ ext2_group_first_block_no(struct super_block *sb, unsigned long group_no) le32_to_cpu(EXT2_SB(sb)->s_es->s_first_data_block); } +static inline ext2_fsblk_t +ext2_group_last_block_no(struct super_block *sb, unsigned long group_no) +{ + struct ext2_sb_info *sbi = EXT2_SB(sb); + + if (group_no == sbi->s_groups_count - 1) + return le32_to_cpu(sbi->s_es->s_blocks_count) - 1; + else + return ext2_group_first_block_no(sb, group_no) + + EXT2_BLOCKS_PER_GROUP(sb) - 1; +} + #define ext2_set_bit __test_and_set_bit_le #define ext2_clear_bit __test_and_clear_bit_le #define ext2_test_bit test_bit_le |