diff options
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 15be2d96b06d..f232512505f8 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -599,6 +599,7 @@ get_default_qdisc_ops(const struct net_device *dev, int ntx) struct Qdisc_class_common { u32 classid; + unsigned int filter_cnt; struct hlist_node hnode; }; @@ -633,6 +634,31 @@ qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) return NULL; } +static inline bool qdisc_class_in_use(const struct Qdisc_class_common *cl) +{ + return cl->filter_cnt > 0; +} + +static inline void qdisc_class_get(struct Qdisc_class_common *cl) +{ + unsigned int res; + + if (check_add_overflow(cl->filter_cnt, 1, &res)) + WARN(1, "Qdisc class overflow"); + + cl->filter_cnt = res; +} + +static inline void qdisc_class_put(struct Qdisc_class_common *cl) +{ + unsigned int res; + + if (check_sub_overflow(cl->filter_cnt, 1, &res)) + WARN(1, "Qdisc class underflow"); + + cl->filter_cnt = res; +} + static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) { u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; |