[PATCH 3/7] vfs: Add a mount-notification facility
dhowells at redhat.com
Wed May 29 11:16:27 UTC 2019
Jann Horn <jannh at google.com> wrote:
> I don't really know. I guess it depends on how it's being used? If
> someone decides to e.g. make a file browser that installs watches for
> a bunch of mountpoints for some fancy sidebar showing the device
> mounts on the system, or something like that, that probably shouldn't
> inhibit unmounting... I don't know if that's a realistic use case.
In such a use case, I would envision the browser putting a watch on "/". A
watch sees all events in the subtree rooted at that point and you must apply a
filter that filters them out if you're not interested (filter on
WATCH_INFO_IN_SUBTREE using info_filter and info_mask).
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