On Mon, Feb 01, 2016 at 04:20:30PM +0100, Stanislav Brabec wrote:
> Karel Zak wrote:
> > It's safe, but "mount -a" is going to call the btrfs ioctl or each
> > "auto" fstab entry :-)
> >
> I am aware of it. Guessing what is more effective: search for all
> candidates in mountinfo and checking whether it is btrfs, or blindly
> issuing ioctl() that will:
> - quickly fail with EINVAL for non-btrfs
> - wil be needed for btrfs anyway
I think the EINVAL based solution is good enough. It's one syscall, be
smart in mountinfo (and canonicalize paths, etc.) is more expensive in
some use-cases.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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