diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/dropreason-qdisc.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/include/net/dropreason-qdisc.h b/include/net/dropreason-qdisc.h index 80a2d557e5f7..02a9f580411b 100644 --- a/include/net/dropreason-qdisc.h +++ b/include/net/dropreason-qdisc.h @@ -9,10 +9,11 @@ FN(GENERIC) \ FN(OVERLIMIT) \ FN(CONGESTED) \ + FN(MAXFLOWS) \ FN(CAKE_FLOOD) \ FN(FQ_BAND_LIMIT) \ FN(FQ_HORIZON_LIMIT) \ - FN(FQ_FLOW_LIMIT) \ + FN(FLOW_LIMIT) \ FNe(MAX) #undef FN @@ -60,6 +61,13 @@ enum qdisc_drop_reason { */ QDISC_DROP_CONGESTED, /** + * @QDISC_DROP_MAXFLOWS: packet dropped because the qdisc's flow + * tracking table is full and no free slots are available to allocate + * for a new flow. This indicates flow table exhaustion in flow-based + * qdiscs that maintain per-flow state (e.g., SFQ). + */ + QDISC_DROP_MAXFLOWS, + /** * @QDISC_DROP_CAKE_FLOOD: CAKE qdisc dropped packet due to flood * protection mechanism (BLUE algorithm). This indicates potential * DoS/flood attack or unresponsive flow behavior. @@ -77,10 +85,12 @@ enum qdisc_drop_reason { */ QDISC_DROP_FQ_HORIZON_LIMIT, /** - * @QDISC_DROP_FQ_FLOW_LIMIT: FQ dropped packet because an individual - * flow exceeded its per-flow packet limit. + * @QDISC_DROP_FLOW_LIMIT: packet dropped because an individual flow + * exceeded its per-flow packet/depth limit. Used by FQ and SFQ qdiscs + * to enforce per-flow fairness and prevent a single flow from + * monopolizing queue resources. */ - QDISC_DROP_FQ_FLOW_LIMIT, + QDISC_DROP_FLOW_LIMIT, /** * @QDISC_DROP_MAX: the maximum of qdisc drop reasons, which * shouldn't be used as a real 'reason' - only for tracing code gen |