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Commit 60ba24a3 authored by Tianyi Gou's avatar Tianyi Gou Committed by Stephen Boyd
Browse files

net: sched: export an api to enable/disable flow on sch 



Export a function from sch_api.c that will look up
desired qdisc and call it's registered change function
to enable/disable flow.

Change-Id: I5b6dc7a6fd2b09b796c92b3770ba83423d19c864
CRs-Fixed: 355156
Acked-by: default avatarJimi Shah <jimis@qualcomm.com>
Signed-off-by: default avatarTianyi Gou <tgou@codeaurora.org>
parent 3fcdaed4

include/net/pkt_sched.h

+2 −1
Original line number Diff line number Diff line
@@ -109,7 +109,8 @@ extern int tc_classify_compat(struct sk_buff *skb, const struct tcf_proto *tp, 
			      struct tcf_result *res);

extern int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,

		       struct tcf_result *res);



extern void tc_qdisc_flow_control(struct net_device *dev, u32 tcm_handle,

				  int flow_enable);

/* Calculate maximal size of packet seen by hard_start_xmit

   routine of this device.

 */

net/sched/sch_api.c

+29 −0
Original line number Diff line number Diff line
@@ -1036,6 +1036,35 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n) 
	return 0;

}



/*

 * enable/disable flow on qdisc.

 */

void

tc_qdisc_flow_control(struct net_device *dev, u32 tcm_handle, int enable_flow)

{

	struct Qdisc *q;

	struct __qdisc_change_req {

		struct nlattr attr;

		struct tc_prio_qopt data;

	} req =	{

		.attr = {sizeof(struct __qdisc_change_req), TCA_OPTIONS},

		.data = {3, {1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1}, 1}

		};



	/* override flow bit */

	req.data.enable_flow = enable_flow;



	/* look up using tcm handle */

	q = qdisc_lookup(dev, tcm_handle);



	/* call registered change function */

	if (q) {

		if (q->ops->change(q, &(req.attr)) != 0)

			pr_err("tc_qdisc_flow_control: qdisc change failed");

	}

}

EXPORT_SYMBOL(tc_qdisc_flow_control);



/*

 * Create/change qdisc.

 */