• Tao Ma's avatar
    ocfs2: Add extent tree operation for xattr value btrees · f56654c4
    Tao Ma authored
    Add some thin wrappers around ocfs2_insert_extent() for each of the 3
    different btree types, ocfs2_inode_insert_extent(),
    ocfs2_xattr_value_insert_extent() and ocfs2_xattr_tree_insert_extent(). The
    last is for the xattr index btree, which will be used in a followup patch.
    All the old callers in file.c etc will call ocfs2_dinode_insert_extent(),
    while the other two handle the xattr issue. And the init of extent tree are
    handled by these functions.
    When storing xattr value which is too large, we will allocate some clusters
    for it and here ocfs2_extent_list and ocfs2_extent_rec will also be used. In
    order to re-use the b-tree operation code, a new parameter named "private"
    is added into ocfs2_extent_tree and it is used to indicate the root of
    ocfs2_exent_list. The reason is that we can't deduce the root from the
    buffer_head now. It may be in an inode, an ocfs2_xattr_block or even worse,
    in any place in an ocfs2_xattr_bucket.
    Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
    Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
masklog.c 4.1 KB