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    Subject[PATCH 23/23] ext4/jbd2: Add metadata checksumming to the list of supported features
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    Activate the metadata checksumming feature by adding it to ext4 and jbd2's
    lists of supported features.

    Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
    ---
    fs/ext4/ext4.h | 6 ++++--
    include/linux/jbd2.h | 3 ++-
    2 files changed, 6 insertions(+), 3 deletions(-)


    diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
    index 325bae0..af756bc 100644
    --- a/fs/ext4/ext4.h
    +++ b/fs/ext4/ext4.h
    @@ -1461,7 +1461,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
    EXT4_FEATURE_INCOMPAT_EXTENTS| \
    EXT4_FEATURE_INCOMPAT_64BIT| \
    EXT4_FEATURE_INCOMPAT_FLEX_BG| \
    - EXT4_FEATURE_INCOMPAT_MMP)
    + EXT4_FEATURE_INCOMPAT_MMP| \
    + EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM)
    #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
    EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \
    EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
    @@ -1469,7 +1470,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
    EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
    EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
    EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
    - EXT4_FEATURE_RO_COMPAT_BIGALLOC)
    + EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
    + EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)

    /*
    * Default values for user and/or group using reserved blocks
    diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
    index 51d4a0b..b1c5857 100644
    --- a/include/linux/jbd2.h
    +++ b/include/linux/jbd2.h
    @@ -296,7 +296,8 @@ typedef struct journal_superblock_s
    #define JBD2_KNOWN_ROCOMPAT_FEATURES 0
    #define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | \
    JBD2_FEATURE_INCOMPAT_64BIT | \
    - JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)
    + JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | \
    + JBD2_FEATURE_INCOMPAT_CSUM_V2)

    #ifdef __KERNEL__



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