tree b834d3ea66baeeab145c1c11dd15addf732b567f
parent 232cad8413a0bfbd25f11cc19fd13dfd85e1d8ad
author Davide Italiano <dccitaliano@gmail.com> 1428383355 -0700
committer David Sterba <dsterba@suse.com> 1459779928 +0200

Btrfs: Improve FL_KEEP_SIZE handling in fallocate

- We call inode_size_ok() only if FL_KEEP_SIZE isn't specified.
- As an optimisation we can skip the call if (off + len)
  isn't greater than the current size of the file. This operation
  is called under the lock so the less work we do, the better.
- If we call inode_size_ok() pass to it the correct value rather
  than a more conservative estimation.

Signed-off-by: Davide Italiano <dccitaliano@gmail.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>