From ff2998f29f390d963299103f0b247cc79106ced5 Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Thu, 26 Feb 2026 14:44:12 +0100 Subject: net: sched: introduce qdisc-specific drop reason tracing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Create new enum qdisc_drop_reason and trace_qdisc_drop tracepoint for qdisc layer drop diagnostics with direct qdisc context visibility. The new tracepoint includes qdisc handle, parent, kind (name), and device information. Existing SKB_DROP_REASON_QDISC_DROP is retained for backwards compatibility via kfree_skb_reason(). Convert qdiscs with drop reasons to use the new infrastructure. Change CAKE's cobalt_should_drop() return type from enum skb_drop_reason to enum qdisc_drop_reason to fix implicit enum conversion warnings. Use QDISC_DROP_UNSPEC as the 'not dropped' sentinel instead of SKB_NOT_DROPPED_YET. Both have the same compiled value (0), so the comparison logic remains semantically equivalent. Signed-off-by: Jesper Dangaard Brouer Reviewed-by: Toke Høiland-Jørgensen Link: https://patch.msgid.link/177211345275.3011628.1974310302645218067.stgit@firesoul Signed-off-by: Jakub Kicinski --- include/net/dropreason.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/net/dropreason.h') diff --git a/include/net/dropreason.h b/include/net/dropreason.h index 7d3b1a2a6fec..1df60645fb27 100644 --- a/include/net/dropreason.h +++ b/include/net/dropreason.h @@ -23,6 +23,12 @@ enum skb_drop_reason_subsys { */ SKB_DROP_REASON_SUBSYS_OPENVSWITCH, + /** + * @SKB_DROP_REASON_SUBSYS_QDISC: TC qdisc drop reasons, + * see include/net/dropreason-qdisc.h + */ + SKB_DROP_REASON_SUBSYS_QDISC, + /** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */ SKB_DROP_REASON_SUBSYS_NUM }; -- cgit v1.2.3