Looking at the transmission source, it is using Q_GETQUOTA and Q_XGETQUOTA. As such, we can adjust mount-observe to use quotactl with Q_GET* seccomp argument filtering.
Setting quotas would be a separate, privileged separate interface since that would affect other snaps (since quotactl is user-specific, not snap-specific).
Looking at the transmission source, it is using Q_GETQUOTA and Q_XGETQUOTA. As such, we can adjust mount-observe to use quotactl with Q_GET* seccomp argument filtering.
Setting quotas would be a separate, privileged separate interface since that would affect other snaps (since quotactl is user-specific, not snap-specific).