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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-11-13 01:58:13 +0300
committerDavid S. Miller <davem@davemloft.net>2018-11-14 19:51:28 +0300
commitbf2a752bea027ec5a0bc5b4042d78b32715ad198 (patch)
tree1c92e4f9cc3f90974cb33e2579dfc1f867cb2d46 /net/sched
parentaee7539c5876cc65f5ffa88615a88eb724358cc1 (diff)
downloadlinux-bf2a752bea027ec5a0bc5b4042d78b32715ad198.tar.xz
net: sched: red: offload a graft notification
Drivers offloading Qdiscs should have reasonable certainty the offloaded behaviour matches the SW path. This is impossible if the driver does not know about all Qdiscs or when Qdiscs move and are reused. Send a graft notification from RED. The drivers are expected to simply stop offloading the Qdisc, if a non-standard child is ever grafted onto it. 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>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_red.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index a1d08bdd9357..4b5ca172ee2d 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -367,6 +367,21 @@ static int red_dump_class(struct Qdisc *sch, unsigned long cl,
return 0;
}
+static void red_graft_offload(struct Qdisc *sch,
+ struct Qdisc *new, struct Qdisc *old,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_red_qopt_offload graft_offload = {
+ .handle = sch->handle,
+ .parent = sch->parent,
+ .child_handle = new->handle,
+ .command = TC_RED_GRAFT,
+ };
+
+ qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, old,
+ TC_SETUP_QDISC_RED, &graft_offload, extack);
+}
+
static int red_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
struct Qdisc **old, struct netlink_ext_ack *extack)
{
@@ -376,6 +391,8 @@ static int red_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
new = &noop_qdisc;
*old = qdisc_replace(sch, new, &q->qdisc);
+
+ red_graft_offload(sch, new, *old, extack);
return 0;
}