Re: [RFC][PATCH 1/2] fanotify: add support for FAN_UNMOUNT event

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On Wed, Apr 19, 2023 at 4:14 PM Jan Kara <jack@xxxxxxx> wrote:
>
> On Fri 14-04-23 21:29:02, Amir Goldstein wrote:
> > inotify generates unsolicited IN_UNMOUNT events for every inode
> > mark before the filesystem containing the inode is shutdown.
> >
> > Unlike IN_UNMOUNT, FAN_UNMOUNT is an opt-in event that can only be
> > set on a mount mark and is generated when the mount is unmounted.
> >
> > FAN_UNMOUNT requires FAN_REPORT_FID and reports an fid info record
> > with fsid of the filesystem and an empty file handle.
> >
> > Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
>
> Seeing the discussion further in this thread regarding FAN_IGNORED won't
> it be more consistent (extensible) to implement the above functionality as
> FAN_IGNORED delivered to mount mark when it is getting destroyed?
>
> I.e., define FAN_IGNORED as an event that gets delivered when a mark is
> getting destroyed (with the records identifying the mark). For now start
> supporting it on mount marks, later we can add support to other mark types
> if there's demand. Thoughts?

Sounds like a good idea.

I will look into it.

Thanks,
Amir.




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