[PATCH bpf-next v1 10/13] bpf: net_sched: Allow writing to more Qdisc members

[Amery Hung <amery.hung@xxxxxxxxxxxxx>]

Allow bpf qdisc to write to Qdisc->limit and Qdisc->q.qlen.

Signed-off-by: Amery Hung <amery.hung@xxxxxxxxxxxxx>
---
 net/sched/bpf_qdisc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/sched/bpf_qdisc.c b/net/sched/bpf_qdisc.c
index 3901f855effc..1caa9f696d2d 100644
--- a/net/sched/bpf_qdisc.c
+++ b/net/sched/bpf_qdisc.c
@@ -89,6 +89,12 @@ static int bpf_qdisc_qdisc_access(struct bpf_verifier_log *log,
 	size_t end;
 
 	switch (off) {
+	case offsetof(struct Qdisc, limit):
+		end = offsetofend(struct Qdisc, limit);
+		break;
+	case offsetof(struct Qdisc, q) + offsetof(struct qdisc_skb_head, qlen):
+		end = offsetof(struct Qdisc, q) + offsetofend(struct qdisc_skb_head, qlen);
+		break;
 	case offsetof(struct Qdisc, qstats) ... offsetofend(struct Qdisc, qstats) - 1:
 		end = offsetofend(struct Qdisc, qstats);
 		break;
-- 
2.20.1