On Fri, Mar 04, 2016 at 07:13:25PM -0800, Linus Torvalds wrote: > > + /* We can't change the bdev size from here */ > > + if (!(mode & FALLOC_FL_KEEP_SIZE)) > > + return -EOPNOTSUPP; > > Oh, and this I think is wrong. > > The thing is, FALLOC_FL_KEEP_SIZE is only supposed to matter if the > region is outside the existing length.
For allocations... > So if y ou punch a hole in the middle of a file, you don't need > FALLOC_FL_KEEP_SIZE. For FALLOC_FL_PUNCH_HOLE we always require FALLOC_FL_KEEP_SIZE so far, and I'd rather not change things for block devices just because we can.
