@@ -1222,6 +1222,9 @@ struct ext4_sb_info {
/* record the last minlen when FITRIM is called. */
atomic_t s_last_trim_minblks;
+
+ /* Precomputed FS UUID checksum */
+ __u32 s_uuid_crc;
};
static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@@ -1360,6 +1363,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
+#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
#define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001
#define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002
@@ -1402,7 +1406,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
/*
* Default values for user and/or group using reserved blocks
This patch introduces a rocompat feature flag to signal the presence of checksums for metadata blocks. It also provides storage for a precomputed UUID checksum. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> --- fs/ext4/ext4.h | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html