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