This flag was not accepted when fiemap was proposed [2] due to lack of in-kernel users. Btrfs has compression for a long time and we'd like to see that an extent is compressed in the output of 'filefrag' utility once it's taught about it. [1] http://article.gmane.org/gmane.comp.file-systems.ext4/8871 [2] http://thread.gmane.org/gmane.comp.file-systems.ext4/8870 CC: Christoph Hellwig <hch@xxxxxxxxxxxxx> CC: Mark Fasheh <mfasheh@xxxxxxxx> Signed-off-by: David Sterba <dsterba@xxxxxxx> --- include/uapi/linux/fiemap.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/include/uapi/linux/fiemap.h b/include/uapi/linux/fiemap.h index 0f52849..74d1da9 100644 --- a/include/uapi/linux/fiemap.h +++ b/include/uapi/linux/fiemap.h @@ -49,6 +49,8 @@ struct fiemap { * Sets EXTENT_UNKNOWN. */ #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read * while fs is unmounted */ +#define FIEMAP_EXTENT_DATA_COMPRESSED 0x00000040 /* Data is compressed by fs. + * Sets EXTENT_ENCODED */ #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. * Sets EXTENT_ENCODED */ #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be -- 1.7.9 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
