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.
Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
fs/ext2/ext2.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
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
--
2.20.1
