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: Jimi Shah <jimis@qualcomm.com>
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 3d8981f..60e2fa9 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1030,6 +1030,35 @@
}
/*
+ * 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.
*/