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authorNogah Frankel <nogahf@mellanox.com>2018-02-28 10:45:06 +0100
committerDavid S. Miller <davem@davemloft.net>2018-02-28 12:06:01 -0500
commitb9c7a7acc749f3d0667a2ab44ea38110d5a1f286 (patch)
tree7fb0bf4b0fd4bdf02b88c29f69bb68388565ef66 /net/sched/sch_prio.c
parentmlxsw: spectrum: qdiscs: prio: Delete child qdiscs when removing bands (diff)
downloadlinux-dev-b9c7a7acc749f3d0667a2ab44ea38110d5a1f286.tar.xz
linux-dev-b9c7a7acc749f3d0667a2ab44ea38110d5a1f286.zip
net: sch: prio: Add offload ability for grafting a child
Offload sch_prio graft command for capable drivers. Warn in case of a failure, unless the graft was done as part of a destroy operation (the new qdisc is a noop) or if all the qdiscs (the parent, the old child, and the new one) are not offloaded. Signed-off-by: Nogah Frankel <nogahf@mellanox.com> Reviewed-by: Yuval Mintz <yuvalm@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--net/sched/sch_prio.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index ba2d6d17d95a..222e53d3d27a 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -308,12 +308,44 @@ static int prio_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
struct Qdisc **old, struct netlink_ext_ack *extack)
{
struct prio_sched_data *q = qdisc_priv(sch);
+ struct tc_prio_qopt_offload graft_offload;
+ struct net_device *dev = qdisc_dev(sch);
unsigned long band = arg - 1;
+ bool any_qdisc_is_offloaded;
+ int err;
if (new == NULL)
new = &noop_qdisc;
*old = qdisc_replace(sch, new, &q->queues[band]);
+
+ if (!tc_can_offload(dev))
+ return 0;
+
+ graft_offload.handle = sch->handle;
+ graft_offload.parent = sch->parent;
+ graft_offload.graft_params.band = band;
+ graft_offload.graft_params.child_handle = new->handle;
+ graft_offload.command = TC_PRIO_GRAFT;
+
+ err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_PRIO,
+ &graft_offload);
+
+ /* Don't report error if the graft is part of destroy operation. */
+ if (err && new != &noop_qdisc) {
+ /* Don't report error if the parent, the old child and the new
+ * one are not offloaded.
+ */
+ any_qdisc_is_offloaded = sch->flags & TCQ_F_OFFLOADED;
+ any_qdisc_is_offloaded |= new->flags & TCQ_F_OFFLOADED;
+ if (*old)
+ any_qdisc_is_offloaded |= (*old)->flags &
+ TCQ_F_OFFLOADED;
+
+ if (any_qdisc_is_offloaded)
+ NL_SET_ERR_MSG(extack, "Offloading graft operation failed.");
+ }
+
return 0;
}