On Thu, Oct 18, 2012 at 04:11:17PM +1100, Dave Chinner wrote: > So, I was bored a few days ago, and I was sick of having to run > xfs_db incorrectly report free space extents when the filesytem is > mounted, so I decided to extend fiemap to export freespace mappings > to userspace so I could get the information coherently through the > mounted filesystem. > > Yes, this could probably be considered interface abuse but, well, it > was simple to do because extent mapping is exactly what fiemap is > designed to do. Hence I didn't have to write new walkers/formatters > and I was using code I knew worked correctly. I think the right way to handle this is to introduce a new ioctl which uses the same structures. That way we have a reasonable interface, without issue like which file does it need to be called on because the VFS glue can turn it into a superblock op. -- 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
