fanotify: Track permission event state
Track whether permission event got already reported to userspace and whether userspace already answered to the permission event. Protect stores to this field together with updates to ->response field by group->notification_lock. This will allow aborting wait for reply to permission event from userspace. Reviewed-by:Amir Goldstein <amir73il@gmail.com> Signed-off-by:
Jan Kara <jack@suse.cz>
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