On Sat, Jan 18, 2020 at 05:38:51PM +0800, Murphy Zhou wrote: > > But do those tests require filefrag -B?? > > Not really. But filefrag will fall back to use fibmap. But that means it requires either FIEMAP or FIBMAP, and your patch will cause regressions for file systems only implementing FIEMAP. So the fix isn't to ask for FIBMAP, but to implement FIEMAP in any file system missing that support.
