Commit 6b3efbfa authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

net: sch_tbf: Add a graft command 



As another qdisc is linked to the TBF, the latter should issue an event to
give drivers a chance to react to the grafting. In other qdiscs, this event
is called GRAFT, so follow suit with TBF as well.

Signed-off-by: default avatarPetr Machata <petrm@nvidia.com>
Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aaa55706

include/net/pkt_cls.h

+2 −0
Original line number Diff line number Diff line
@@ -977,6 +977,7 @@ enum tc_tbf_command { 
	TC_TBF_REPLACE,

	TC_TBF_DESTROY,

	TC_TBF_STATS,

	TC_TBF_GRAFT,

};



struct tc_tbf_qopt_offload_replace_params {
@@ -992,6 +993,7 @@ struct tc_tbf_qopt_offload { 
	union {

		struct tc_tbf_qopt_offload_replace_params replace_params;

		struct tc_qopt_offload_stats stats;

		u32 child_handle;

	};

};

net/sched/sch_tbf.c

+16 −0
Original line number Diff line number Diff line
@@ -184,6 +184,20 @@ static int tbf_offload_dump(struct Qdisc *sch) 
	return qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_TBF, &qopt);

}



static void tbf_offload_graft(struct Qdisc *sch, struct Qdisc *new,

			      struct Qdisc *old, struct netlink_ext_ack *extack)

{

	struct tc_tbf_qopt_offload graft_offload = {

		.handle		= sch->handle,

		.parent		= sch->parent,

		.child_handle	= new->handle,

		.command	= TC_TBF_GRAFT,

	};



	qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, old,

				   TC_SETUP_QDISC_TBF, &graft_offload, extack);

}



/* GSO packet is too big, segment it so that tbf can transmit

 * each segment in time

 */
@@ -547,6 +561,8 @@ static int tbf_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, 
		new = &noop_qdisc;



	*old = qdisc_replace(sch, new, &q->qdisc);



	tbf_offload_graft(sch, new, *old, extack);

	return 0;

}