Re: [PATCH 0/3] fanotify support for btrfs sub-volumes

[Josef Bacik <josef@toxicpanda.com>]

On Thu, Nov 02, 2023 at 10:48:35AM +0100, Christian Brauner wrote:
> > We'll be converted to the new mount API tho, so I suppose that's something.
> > Thanks,
> 
> Just in case you forgot about it. I did send a patch to convert btrfs to
> the new mount api in June:
> 
> https://lore.kernel.org/all/20230626-fs-btrfs-mount-api-v1-0-045e9735a00b@kernel.org
> 

Yeah Daan told me about this after I had done the bulk of the work.  I
shamelessly stole the dup idea, I had been doing something uglier.

> Can I ask you to please please copy just two things from that series:
> 
> (1) Please get rid of the second filesystems type.
> (2) Please fix the silent remount behavior when mounting a subvolume.
>

Yeah I've gotten rid of the second file system type, the remount thing is odd,
I'm going to see if I can get away with not bringing that over.  I *think* it's
because the standard distro way of doing things is to do

mount -o ro,subvol=/my/root/vol /
mount -o rw,subvol=/my/home/vol /home
<boot some more>
mount -o remount,rw /

but I haven't messed with it yet to see if it breaks.  That's on the list to
investigate today.  Thanks,

Josef