• Theodore Ts'o's avatar
    ext4: call ext4_forget() from ext4_free_blocks() · e6362609
    Theodore Ts'o authored
    Add the facility for ext4_forget() to be called from
    ext4_free_blocks().  This simplifies the code in a large number of
    places, and centralizes most of the work of calling ext4_forget() into
    a single place.
    
    Also fix a bug in the extents migration code; it wasn't calling
    ext4_forget() when releasing the indirect blocks during the
    conversion.  As a result, if the system cashed during or shortly after
    the extents migration, and the released indirect blocks get reused as
    data blocks, the journal replay would corrupt the data blocks.  With
    this new patch, fixing this bug was as simple as adding the
    EXT4_FREE_BLOCKS_FORGET flags to the call to ext4_free_blocks().
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
    e6362609
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