The original FIEMAP patch did not define this bit, btrfs will make use of it. The defined constant maintains the same value as originally proposed.
Currently, the 'filefrag' utility has no way to recognize and denote a compressed extent. As implemented in btrfs right now, the compression step splits a big extent into smaller chunks and this is reported as a heavily fragmented file. Adding the flag to filefrag will at least give some explanation why, this has been confusing users for some time already. fiemap_fill_next_extent is extended and takes argument to fill the physical length. V4: The physical length is always set and equal to logical, or different and then sets the COMPRESSED flag. fiemap_extent::fe_length renamed to fe_logi_length V3: Based on feedback from Andreas, implement #1 from V2, current users of fiemap_fill_next_extent (fs/, ext4, gfs2, ocfs2, nilfs2, xfs) updated accordingly, no functional change. V2: Based on feedback from Andreas, the fiemap_extent is now able to hold the physical extent length, to be filled by the filesystem callback. 1) extend fiemap_fill_next_extent to take phys_length and update all users (ext4, gfs2, ocfs2, nilfs2, xfs) David Sterba (5): fiemap: fix comment at EXTENT_DATA_ENCRYPTED fiemap: add EXTENT_DATA_COMPRESSED flag btrfs: set FIEMAP_EXTENT_DATA_COMPRESSED for compressed extents Documentation/fiemap: Document the DATA_COMPRESSED flag fiemap: rename fe_length to fe_logi_length Documentation/filesystems/fiemap.txt | 19 +++++++++++++++---- fs/btrfs/extent_io.c | 8 ++++++-- fs/ext4/extents.c | 3 ++- fs/ext4/inline.c | 2 +- fs/gfs2/inode.c | 2 +- fs/ioctl.c | 29 ++++++++++++++++++++++------- fs/nilfs2/inode.c | 8 +++++--- fs/ocfs2/extent_map.c | 4 ++-- fs/xfs/xfs_iops.c | 2 +- include/linux/fs.h | 2 +- include/uapi/linux/fiemap.h | 13 ++++++++++--- 11 files changed, 66 insertions(+), 26 deletions(-) -- 18.104.22.168 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html