diff options
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 31b8ea66a47d..85993d7efee6 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -341,6 +341,8 @@ struct qdisc_skb_cb { typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); struct tcf_chain { + /* Protects filter_chain. */ + struct mutex filter_chain_lock; struct tcf_proto __rcu *filter_chain; struct list_head list; struct tcf_block *block; @@ -374,6 +376,21 @@ struct tcf_block { struct rcu_head rcu; }; +#ifdef CONFIG_PROVE_LOCKING +static inline bool lockdep_tcf_chain_is_locked(struct tcf_chain *chain) +{ + return lockdep_is_held(&chain->filter_chain_lock); +} +#else +static inline bool lockdep_tcf_chain_is_locked(struct tcf_block *chain) +{ + return true; +} +#endif /* #ifdef CONFIG_PROVE_LOCKING */ + +#define tcf_chain_dereference(p, chain) \ + rcu_dereference_protected(p, lockdep_tcf_chain_is_locked(chain)) + static inline void tcf_block_offload_inc(struct tcf_block *block, u32 *flags) { if (*flags & TCA_CLS_FLAGS_IN_HW) |