On Mon, Jun 19, 2017 at 10:22:14PM -0700, Darrick J. Wong wrote: <> > Fourth, the VFS entry points for things like read, write, truncate, > utimes, fallocate, etc. all just bail out if S_IOMAP_FROZEN is set on a > file, so that the block map cannot be modified. mmap is still allowed, > as we've discussed. /Maybe/ we can allow fallocate to extend a file > with zeroed extents (it will be slow) as I've heard murmurs about > wanting to be able to extend a file, maybe not. Read and write should still be allowed, right?
