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263 lines
8.1 KiB
263 lines
8.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#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 <linux/refcount.h> |
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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_idrinfo { |
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struct mutex lock; |
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struct idr action_idr; |
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struct net *net; |
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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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struct tcf_idrinfo *idrinfo; |
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u32 tcfa_index; |
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refcount_t tcfa_refcnt; |
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atomic_t tcfa_bindcnt; |
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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_basic_packed tcfa_bstats_hw; |
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struct gnet_stats_queue tcfa_qstats; |
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struct net_rate_estimator __rcu *tcfa_rate_est; |
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spinlock_t tcfa_lock; |
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struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
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struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw; |
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struct gnet_stats_queue __percpu *cpu_qstats; |
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struct tc_cookie __rcu *act_cookie; |
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struct tcf_chain __rcu *goto_chain; |
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u32 tcfa_flags; |
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u8 hw_stats; |
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u8 used_hw_stats; |
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bool used_hw_stats_valid; |
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}; |
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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_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 TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \ |
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TCA_ACT_HW_STATS_DELAYED) |
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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 = stm->firstuse ? |
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jiffies_to_clock_t(jiffies - stm->firstuse) : 0; |
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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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typedef void (*tc_action_priv_destructor)(void *priv); |
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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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enum tca_id id; /* identifier should 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 *); /* called under RCU BH lock*/ |
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int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
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void (*cleanup)(struct tc_action *); |
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int (*lookup)(struct net *net, struct tc_action **a, u32 index); |
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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, bool rtnl_held, struct tcf_proto *tp, |
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u32 flags, struct netlink_ext_ack *extack); |
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int (*walk)(struct net *, struct sk_buff *, |
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struct netlink_callback *, int, |
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const struct tc_action_ops *, |
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struct netlink_ext_ack *); |
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void (*stats_update)(struct tc_action *, u64, u64, u64, u64, bool); |
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size_t (*get_fill_size)(const struct tc_action *act); |
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struct net_device *(*get_dev)(const struct tc_action *a, |
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tc_action_priv_destructor *destructor); |
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struct psample_group * |
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(*get_psample_group)(const struct tc_action *a, |
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tc_action_priv_destructor *destructor); |
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}; |
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struct tc_action_net { |
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struct tcf_idrinfo *idrinfo; |
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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 net *net, struct tc_action_net *tn, |
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const struct tc_action_ops *ops) |
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{ |
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int err = 0; |
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tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); |
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if (!tn->idrinfo) |
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return -ENOMEM; |
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tn->ops = ops; |
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tn->idrinfo->net = net; |
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mutex_init(&tn->idrinfo->lock); |
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idr_init(&tn->idrinfo->action_idr); |
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return err; |
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} |
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void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
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struct tcf_idrinfo *idrinfo); |
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static inline void tc_action_net_exit(struct list_head *net_list, |
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unsigned int id) |
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{ |
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struct net *net; |
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rtnl_lock(); |
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list_for_each_entry(net, net_list, exit_list) { |
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struct tc_action_net *tn = net_generic(net, id); |
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tcf_idrinfo_destroy(tn->ops, tn->idrinfo); |
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kfree(tn->idrinfo); |
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} |
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rtnl_unlock(); |
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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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struct netlink_ext_ack *extack); |
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int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
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int tcf_idr_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, |
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int bind, bool cpustats, u32 flags); |
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int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index, |
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struct nlattr *est, struct tc_action **a, |
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const struct tc_action_ops *ops, int bind, |
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u32 flags); |
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void tcf_idr_insert_many(struct tc_action *actions[]); |
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void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); |
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int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, |
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struct tc_action **a, int bind); |
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int tcf_idr_release(struct tc_action *a, bool bind); |
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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 tc_action *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 tcf_proto *tp, struct nlattr *nla, |
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struct nlattr *est, char *name, int ovr, int bind, |
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struct tc_action *actions[], int init_res[], size_t *attr_size, |
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bool rtnl_held, struct netlink_ext_ack *extack); |
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struct tc_action_ops *tc_action_load_ops(char *name, struct nlattr *nla, |
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bool rtnl_held, |
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struct netlink_ext_ack *extack); |
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struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
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struct nlattr *nla, struct nlattr *est, |
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char *name, int ovr, int bind, |
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struct tc_action_ops *a_o, int *init_res, |
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bool rtnl_held, |
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struct netlink_ext_ack *extack); |
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int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, |
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int ref, bool terse); |
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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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static inline void tcf_action_update_bstats(struct tc_action *a, |
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struct sk_buff *skb) |
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{ |
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if (likely(a->cpu_bstats)) { |
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bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb); |
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return; |
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} |
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spin_lock(&a->tcfa_lock); |
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bstats_update(&a->tcfa_bstats, skb); |
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spin_unlock(&a->tcfa_lock); |
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} |
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static inline void tcf_action_inc_drop_qstats(struct tc_action *a) |
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{ |
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if (likely(a->cpu_qstats)) { |
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qstats_drop_inc(this_cpu_ptr(a->cpu_qstats)); |
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return; |
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} |
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spin_lock(&a->tcfa_lock); |
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qstats_drop_inc(&a->tcfa_qstats); |
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spin_unlock(&a->tcfa_lock); |
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} |
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static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a) |
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{ |
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if (likely(a->cpu_qstats)) { |
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qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats)); |
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return; |
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} |
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spin_lock(&a->tcfa_lock); |
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qstats_overlimit_inc(&a->tcfa_qstats); |
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spin_unlock(&a->tcfa_lock); |
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} |
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void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets, |
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u64 drops, bool hw); |
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int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); |
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int tcf_action_check_ctrlact(int action, struct tcf_proto *tp, |
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struct tcf_chain **handle, |
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struct netlink_ext_ack *newchain); |
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struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, |
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struct tcf_chain *newchain); |
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#ifdef CONFIG_INET |
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DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count); |
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#endif |
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int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); |
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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 drops, |
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u64 lastuse, bool hw) |
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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, drops, lastuse, hw); |
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#endif |
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} |
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#endif
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