From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- include/net/act_api.h | 297 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 297 insertions(+) create mode 100644 include/net/act_api.h (limited to 'include/net/act_api.h') diff --git a/include/net/act_api.h b/include/net/act_api.h new file mode 100644 index 000000000..4ae0580b6 --- /dev/null +++ b/include/net/act_api.h @@ -0,0 +1,297 @@ +/* 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 +#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_sync tcfa_bstats; + struct gnet_stats_basic_sync 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_sync __percpu *cpu_bstats; + struct gnet_stats_basic_sync __percpu *cpu_bstats_hw; + struct gnet_stats_queue __percpu *cpu_qstats; + struct tc_cookie __rcu *user_cookie; + struct tcf_chain __rcu *goto_chain; + u32 tcfa_flags; + u8 hw_stats; + u8 used_hw_stats; + bool used_hw_stats_valid; + u32 in_hw_count; +}; +#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 + +#define TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \ + TCA_ACT_HW_STATS_DELAYED) + +/* Reserve 16 bits for user-space. See TCA_ACT_FLAGS_NO_PERCPU_STATS. */ +#define TCA_ACT_FLAGS_USER_BITS 16 +#define TCA_ACT_FLAGS_USER_MASK 0xffff +#define TCA_ACT_FLAGS_POLICE (1U << TCA_ACT_FLAGS_USER_BITS) +#define TCA_ACT_FLAGS_BIND (1U << (TCA_ACT_FLAGS_USER_BITS + 1)) +#define TCA_ACT_FLAGS_REPLACE (1U << (TCA_ACT_FLAGS_USER_BITS + 2)) +#define TCA_ACT_FLAGS_NO_RTNL (1U << (TCA_ACT_FLAGS_USER_BITS + 3)) +#define TCA_ACT_FLAGS_AT_INGRESS (1U << (TCA_ACT_FLAGS_USER_BITS + 4)) + +/* 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); +} + +static inline enum flow_action_hw_stats tc_act_hw_stats(u8 hw_stats) +{ + if (WARN_ON_ONCE(hw_stats > TCA_ACT_HW_STATS_ANY)) + return FLOW_ACTION_HW_STATS_DONT_CARE; + else if (!hw_stats) + return FLOW_ACTION_HW_STATS_DISABLED; + + return hw_stats; +} + +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 */ + unsigned int net_id; + 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, + 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, u64, u64, 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); + int (*offload_act_setup)(struct tc_action *act, void *entry_data, + u32 *index_inc, bool bind, + struct netlink_ext_ack *extack); +}; + +#ifdef CONFIG_NET_CLS_ACT + +#define ACT_P_CREATED 1 +#define ACT_P_DELETED 1 + +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_many(struct tc_action *actions[]); +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); + +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, + struct tc_action *actions[], int init_res[], size_t *attr_size, + u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); +struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police, + 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, + struct tc_action_ops *a_o, int *init_res, + u32 flags, struct netlink_ext_ack *extack); +int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, + int ref, bool terse); +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_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, u64 packets, + u64 drops, bool hw); +int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); + +int tcf_action_update_hw_stats(struct tc_action *action); +int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb, + void *cb_priv, bool add); +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); + +#ifdef CONFIG_INET +DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count); +#endif + +int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); + +#else /* !CONFIG_NET_CLS_ACT */ + +static inline int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb, + void *cb_priv, bool add) { + return 0; +} + +#endif /* CONFIG_NET_CLS_ACT */ + +static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, + u64 packets, u64 drops, + u64 lastuse, bool hw) +{ +#ifdef CONFIG_NET_CLS_ACT + if (!a->ops->stats_update) + return; + + a->ops->stats_update(a, bytes, packets, drops, lastuse, hw); +#endif +} + + +#endif -- cgit v1.2.3