diff options
Diffstat (limited to 'include/net/act_api.h')
| -rw-r--r-- | include/net/act_api.h | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/include/net/act_api.h b/include/net/act_api.h new file mode 100644 index 000000000..c48b750de --- /dev/null +++ b/include/net/act_api.h @@ -0,0 +1,230 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NET_ACT_API_H +#define __NET_ACT_API_H + +/* + * Public action API for classifiers/qdiscs +*/ + +#include <linux/refcount.h> +#include <net/sch_generic.h> +#include <net/pkt_sched.h> +#include <net/net_namespace.h> +#include <net/netns/generic.h> + +struct tcf_idrinfo { + spinlock_t 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) */ + __u32 order; + 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_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_queue __percpu *cpu_qstats; + struct tc_cookie __rcu *act_cookie; + struct tcf_chain *goto_chain; +}; +#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 = stm->firstuse ? + jiffies_to_clock_t(jiffies - stm->firstuse) : 0; + dtm->expires = jiffies_to_clock_t(stm->expires); +} + +#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 */ + 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, + struct netlink_ext_ack *extack); + int (*init)(struct net *net, struct nlattr *nla, + struct nlattr *est, struct tc_action **act, int ovr, + int bind, bool rtnl_held, + 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); + size_t (*get_fill_size)(const struct tc_action *act); + struct net_device *(*get_dev)(const struct tc_action *a); + void (*put_dev)(struct net_device *dev); +}; + +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; + spin_lock_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); +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); +int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); + +#endif /* CONFIG_NET_CLS_ACT */ + +static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, + u64 packets, u64 lastuse) +{ +#ifdef CONFIG_NET_CLS_ACT + if (!a->ops->stats_update) + return; + + a->ops->stats_update(a, bytes, packets, lastuse); +#endif +} + +#ifdef CONFIG_NET_CLS_ACT +int tc_setup_cb_egdev_register(const struct net_device *dev, + tc_setup_cb_t *cb, void *cb_priv); +void tc_setup_cb_egdev_unregister(const struct net_device *dev, + tc_setup_cb_t *cb, void *cb_priv); +int tc_setup_cb_egdev_call(const struct net_device *dev, + enum tc_setup_type type, void *type_data, + bool err_stop); +#else +static inline +int tc_setup_cb_egdev_register(const struct net_device *dev, + tc_setup_cb_t *cb, void *cb_priv) +{ + return 0; +} + +static inline +void tc_setup_cb_egdev_unregister(const struct net_device *dev, + tc_setup_cb_t *cb, void *cb_priv) +{ +} + +static inline +int tc_setup_cb_egdev_call(const struct net_device *dev, + enum tc_setup_type type, void *type_data, + bool err_stop) +{ + return 0; +} +#endif + +#endif |