| #ifndef __NET_ACT_API_H |
| #define __NET_ACT_API_H |
| |
| /* |
| * Public action API for classifiers/qdiscs |
| */ |
| |
| #include <net/sch_generic.h> |
| #include <net/pkt_sched.h> |
| #include <net/net_namespace.h> |
| #include <net/netns/generic.h> |
| |
| struct tcf_common { |
| struct hlist_node tcfc_head; |
| u32 tcfc_index; |
| int tcfc_refcnt; |
| int tcfc_bindcnt; |
| u32 tcfc_capab; |
| int tcfc_action; |
| struct tcf_t tcfc_tm; |
| struct gnet_stats_basic_packed tcfc_bstats; |
| struct gnet_stats_queue tcfc_qstats; |
| struct gnet_stats_rate_est64 tcfc_rate_est; |
| spinlock_t tcfc_lock; |
| struct rcu_head tcfc_rcu; |
| struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
| struct gnet_stats_queue __percpu *cpu_qstats; |
| }; |
| #define tcf_head common.tcfc_head |
| #define tcf_index common.tcfc_index |
| #define tcf_refcnt common.tcfc_refcnt |
| #define tcf_bindcnt common.tcfc_bindcnt |
| #define tcf_capab common.tcfc_capab |
| #define tcf_action common.tcfc_action |
| #define tcf_tm common.tcfc_tm |
| #define tcf_bstats common.tcfc_bstats |
| #define tcf_qstats common.tcfc_qstats |
| #define tcf_rate_est common.tcfc_rate_est |
| #define tcf_lock common.tcfc_lock |
| #define tcf_rcu common.tcfc_rcu |
| |
| struct tcf_hashinfo { |
| struct hlist_head *htab; |
| unsigned int hmask; |
| spinlock_t lock; |
| u32 index; |
| }; |
| |
| static inline unsigned int tcf_hash(u32 index, unsigned int hmask) |
| { |
| return index & hmask; |
| } |
| |
| static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask) |
| { |
| int i; |
| |
| spin_lock_init(&hf->lock); |
| hf->index = 0; |
| hf->hmask = mask; |
| hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head), |
| GFP_KERNEL); |
| if (!hf->htab) |
| return -ENOMEM; |
| for (i = 0; i < mask + 1; i++) |
| INIT_HLIST_HEAD(&hf->htab[i]); |
| return 0; |
| } |
| |
| /* Update lastuse only if needed, to avoid dirtying a cache line. |
| * We use a temp variable to avoid fetching jiffies twice. |
| */ |
| static inline void tcf_lastuse_update(struct tcf_t *tm) |
| { |
| unsigned long now = jiffies; |
| |
| if (tm->lastuse != now) |
| tm->lastuse = now; |
| if (unlikely(!tm->firstuse)) |
| tm->firstuse = now; |
| } |
| |
| static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) |
| { |
| dtm->install = jiffies_to_clock_t(jiffies - stm->install); |
| dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); |
| dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); |
| dtm->expires = jiffies_to_clock_t(stm->expires); |
| } |
| |
| struct tc_action { |
| void *priv; |
| const struct tc_action_ops *ops; |
| __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
| __u32 order; |
| struct list_head list; |
| struct tcf_hashinfo *hinfo; |
| }; |
| |
| #ifdef CONFIG_NET_CLS_ACT |
| |
| #define ACT_P_CREATED 1 |
| #define ACT_P_DELETED 1 |
| |
| struct tc_action_ops { |
| struct list_head head; |
| char kind[IFNAMSIZ]; |
| __u32 type; /* TBD to match kind */ |
| struct module *owner; |
| int (*act)(struct sk_buff *, const struct tc_action *, |
| struct tcf_result *); |
| int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
| void (*cleanup)(struct tc_action *, int bind); |
| int (*lookup)(struct net *, struct tc_action *, u32); |
| int (*init)(struct net *net, struct nlattr *nla, |
| struct nlattr *est, struct tc_action *act, int ovr, |
| int bind); |
| int (*walk)(struct net *, struct sk_buff *, |
| struct netlink_callback *, int, struct tc_action *); |
| void (*stats_update)(struct tc_action *, u64, u32, u64); |
| }; |
| |
| struct tc_action_net { |
| struct tcf_hashinfo *hinfo; |
| const struct tc_action_ops *ops; |
| }; |
| |
| static inline |
| int tc_action_net_init(struct tc_action_net *tn, |
| const struct tc_action_ops *ops, unsigned int mask) |
| { |
| int err = 0; |
| |
| tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL); |
| if (!tn->hinfo) |
| return -ENOMEM; |
| tn->ops = ops; |
| err = tcf_hashinfo_init(tn->hinfo, mask); |
| if (err) |
| kfree(tn->hinfo); |
| return err; |
| } |
| |
| void tcf_hashinfo_destroy(const struct tc_action_ops *ops, |
| struct tcf_hashinfo *hinfo); |
| |
| static inline void tc_action_net_exit(struct tc_action_net *tn) |
| { |
| tcf_hashinfo_destroy(tn->ops, tn->hinfo); |
| kfree(tn->hinfo); |
| } |
| |
| int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, |
| struct netlink_callback *cb, int type, |
| struct tc_action *a); |
| int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index); |
| u32 tcf_hash_new_index(struct tc_action_net *tn); |
| int tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a, |
| int bind); |
| int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
| struct tc_action *a, int size, int bind, bool cpustats); |
| void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est); |
| void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a); |
| |
| int __tcf_hash_release(struct tc_action *a, bool bind, bool strict); |
| |
| static inline int tcf_hash_release(struct tc_action *a, bool bind) |
| { |
| return __tcf_hash_release(a, bind, false); |
| } |
| |
| int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
| int tcf_unregister_action(struct tc_action_ops *a, |
| struct pernet_operations *ops); |
| int tcf_action_destroy(struct list_head *actions, int bind); |
| int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, |
| struct tcf_result *res); |
| int tcf_action_init(struct net *net, struct nlattr *nla, |
| struct nlattr *est, char *n, int ovr, |
| int bind, struct list_head *); |
| struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, |
| struct nlattr *est, char *n, int ovr, |
| int bind); |
| int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); |
| int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
| int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); |
| int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); |
| |
| #define tc_no_actions(_exts) \ |
| (list_empty(&(_exts)->actions)) |
| |
| #define tc_for_each_action(_a, _exts) \ |
| list_for_each_entry(a, &(_exts)->actions, list) |
| |
| static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
| u64 packets, u64 lastuse) |
| { |
| if (!a->ops->stats_update) |
| return; |
| |
| a->ops->stats_update(a, bytes, packets, lastuse); |
| } |
| |
| #else /* CONFIG_NET_CLS_ACT */ |
| |
| #define tc_no_actions(_exts) true |
| #define tc_for_each_action(_a, _exts) while ((void)(_a), 0) |
| #define tcf_action_stats_update(a, bytes, packets, lastuse) |
| |
| #endif /* CONFIG_NET_CLS_ACT */ |
| #endif |