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net: sched: provide notification for graft on root

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Drivers are currently not notified when a Qdisc is grafted as root.
This requires special casing Qdiscs added with parent = TC_H_ROOT in
the driver.  Also there is no notification sent to the driver when
an existing Qdisc is grafted as root.

Add this very simple notifications, drivers should now be able to
track their Qdisc tree fully.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2018-11-12 14:58:10 -08:00
committed by David S. Miller
parent 4f5681d088
commit 98b0e5f684
3 changed files with 28 additions and 0 deletions
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include/linux/netdevice.h
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@@ -845,6 +845,7 @@ enum tc_setup_type {
TC_SETUP_QDISC_PRIO,
TC_SETUP_QDISC_MQ,
TC_SETUP_QDISC_ETF,
TC_SETUP_ROOT_QDISC,
};
/* These structures hold the attributes of bpf state that are being passed