/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NET_ACT_API_H #define __NET_ACT_API_H /* * Public action API for classifiers/qdiscs */ #include #include #include #include #include struct tcf_idrinfo { struct mutex lock; struct idr action_idr; struct net *net; }; struct tc_action_ops; struct tc_action { const struct tc_action_ops *ops; __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ struct tcf_idrinfo *idrinfo; u32 tcfa_index; refcount_t tcfa_refcnt; atomic_t tcfa_bindcnt; int tcfa_action; struct tcf_t tcfa_tm; struct gnet_stats_basic_packed tcfa_bstats; struct gnet_stats_basic_packed tcfa_bstats_hw; struct gnet_stats_queue tcfa_qstats; struct net_rate_estimator __rcu *tcfa_rate_est; spinlock_t tcfa_lock; struct gnet_stats_basic_cpu __percpu *cpu_bstats; struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw; struct gnet_stats_queue __percpu *cpu_qstats; struct tc_cookie __rcu *act_cookie; struct tcf_chain __rcu *goto_chain; u32 tcfa_flags; }; #define tcf_index common.tcfa_index #define tcf_refcnt common.tcfa_refcnt #define tcf_bindcnt common.tcfa_bindcnt #define tcf_action common.tcfa_action #define tcf_tm common.tcfa_tm #define tcf_bstats common.tcfa_bstats #define tcf_qstats common.tcfa_qstats #define tcf_rate_est common.tcfa_rate_est #define tcf_lock common.tcfa_lock /* 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); } #ifdef CONFIG_NET_CLS_ACT #define ACT_P_CREATED 1 #define ACT_P_DELETED 1 typedef void (*tc_action_priv_destructor)(void *priv); struct tc_action_ops { struct list_head head; char kind[IFNAMSIZ]; enum tca_id id; /* identifier should match kind */ size_t size; struct module *owner; int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *); /* called under RCU BH lock*/ int (*dump)(struct sk_buff *, struct tc_action *, int, int); void (*cleanup)(struct tc_action *); int (*lookup)(struct net *net, struct tc_action **a, u32 index); int (*init)(struct net *net, struct nlattr *nla, struct nlattr *est, struct tc_action **act, int ovr, int bind, bool rtnl_held, struct tcf_proto *tp, u32 flags, struct netlink_ext_ack *extack); int (*walk)(struct net *, struct sk_buff *, struct netlink_callback *, int, const struct tc_action_ops *, struct netlink_ext_ack *); void (*stats_update)(struct tc_action *, u64, u32, u64, bool); size_t (*get_fill_size)(const struct tc_action *act); struct net_device *(*get_dev)(const struct tc_action *a, tc_action_priv_destructor *destructor); struct psample_group * (*get_psample_group)(const struct tc_action *a, tc_action_priv_destructor *destructor); }; struct tc_action_net { struct tcf_idrinfo *idrinfo; const struct tc_action_ops *ops; }; static inline int tc_action_net_init(struct net *net, struct tc_action_net *tn, const struct tc_action_ops *ops) { int err = 0; tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); if (!tn->idrinfo) return -ENOMEM; tn->ops = ops; tn->idrinfo->net = net; mutex_init(&tn->idrinfo->lock); idr_init(&tn->idrinfo->action_idr); return err; } void tcf_idrinfo_destroy(const struct tc_action_ops *ops, struct tcf_idrinfo *idrinfo); static inline void tc_action_net_exit(struct list_head *net_list, unsigned int id) { struct net *net; rtnl_lock(); list_for_each_entry(net, net_list, exit_list) { struct tc_action_net *tn = net_generic(net, id); tcf_idrinfo_destroy(tn->ops, tn->idrinfo); kfree(tn->idrinfo); } rtnl_unlock(); } int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, struct netlink_callback *cb, int type, const struct tc_action_ops *ops, struct netlink_ext_ack *extack); int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, struct tc_action **a, const struct tc_action_ops *ops, int bind, bool cpustats, u32 flags); int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index, struct nlattr *est, struct tc_action **a, const struct tc_action_ops *ops, int bind, u32 flags); void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, struct tc_action **a, int bind); int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); static inline int tcf_idr_release(struct tc_action *a, bool bind) { return __tcf_idr_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 tc_action *actions[], int bind); int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, int nr_actions, struct tcf_result *res); int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, struct nlattr *est, char *name, int ovr, int bind, struct tc_action *actions[], size_t *attr_size, bool rtnl_held, struct netlink_ext_ack *extack); struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, struct nlattr *nla, struct nlattr *est, char *name, int ovr, int bind, bool rtnl_held, struct netlink_ext_ack *extack); int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, int ref); 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); static inline void tcf_action_update_bstats(struct tc_action *a, struct sk_buff *skb) { if (likely(a->cpu_bstats)) { bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb); return; } spin_lock(&a->tcfa_lock); bstats_update(&a->tcfa_bstats, skb); spin_unlock(&a->tcfa_lock); } static inline void tcf_action_inc_drop_qstats(struct tc_action *a) { if (likely(a->cpu_qstats)) { qstats_drop_inc(this_cpu_ptr(a->cpu_qstats)); return; } spin_lock(&a->tcfa_lock); qstats_drop_inc(&a->tcfa_qstats); spin_unlock(&a->tcfa_lock); } static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a) { if (likely(a->cpu_qstats)) { qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats)); return; } spin_lock(&a->tcfa_lock); qstats_overlimit_inc(&a->tcfa_qstats); spin_unlock(&a->tcfa_lock); } void tcf_action_update_stats(struct tc_action *a, u64 bytes, u32 packets, bool drop, bool hw); int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); int tcf_action_check_ctrlact(int action, struct tcf_proto *tp, struct tcf_chain **handle, struct netlink_ext_ack *newchain); struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, struct tcf_chain *newchain); #endif /* CONFIG_NET_CLS_ACT */ static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, u64 packets, u64 lastuse, bool hw) { #ifdef CONFIG_NET_CLS_ACT if (!a->ops->stats_update) return; a->ops->stats_update(a, bytes, packets, lastuse, hw); #endif } #endif