Hello, Obviously ext3 doesn't have extents, however it would still be usefull to use it on sparse files in order to find data/holes within a file. What I'm thinking is treat contigous allocated blocks as an extent, and contiguous non-allocated blocks as extents. So for example, with Eric's fiemap test program, on a normal non-sparse file you would only see one large extent for the entire file. In the case of a file that has data, hole and then data you would see 3 extents, two for the two spans of data and one for the span of holes. FIEMAP_FLAG_NUM_EXTENTS would in that case return 3. Does this sound like an acceptable thing to do? If not, are there any other suggestions on how to do fiemap in ext3? Thanks much, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
