• Christoph Hellwig's avatar
    xfs: remove the i_size field in struct xfs_inode · ce7ae151
    Christoph Hellwig authored
    
    
    There is no fundamental need to keep an in-memory inode size copy in the XFS
    inode.  We already have the on-disk value in the dinode, and the separate
    in-memory copy that we need for regular files only in the XFS inode.
    
    Remove the xfs_inode i_size field and change the XFS_ISIZE macro to use the
    VFS inode i_size field for regular files.  Switch code that was directly
    accessing the i_size field in the xfs_inode to XFS_ISIZE, or in cases where
    we are limited to regular files direct access of the VFS inode i_size field.
    
    This also allows dropping some fairly complicated code in the write path
    which dealt with keeping the xfs_inode i_size uptodate with the VFS i_size
    that is getting updated inside ->write_end.
    
    Note that we do not bother resetting the VFS i_size when truncating a file
    that gets freed to zero as there is no point in doing so because the VFS inode
    is no longer in use at this point.  Just relax the assert in xfs_ifree to
    only check the on-disk size instead.
    Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarBen Myers <bpm@sgi.com>
    ce7ae151
xfs_qm_syscalls.c 24.9 KB