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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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/* * Public action API for classifiers/qdiscs*/
#include <linux/refcount.h>#include <net/flow_offload.h>#include <net/sch_generic.h>#include <net/pkt_sched.h>#include <net/net_namespace.h>#include <net/netns/generic.h>
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;
atomic_t tcfa_drops; atomic_t tcfa_overlimits;
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; struct rcu_head tcfa_rcu; 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_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))#define TCA_ACT_FLAGS_AT_INGRESS_OR_CLSACT (1U << (TCA_ACT_FLAGS_USER_BITS + 5))
/* 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 (READ_ONCE(tm->lastuse) != now) WRITE_ONCE(tm->lastuse, now); if (unlikely(!READ_ONCE(tm->firstuse))) WRITE_ONCE(tm->firstuse, now);}
static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm){ unsigned long firstuse, now = jiffies;
dtm->install = jiffies_to_clock_t(now - READ_ONCE(stm->install)); dtm->lastuse = jiffies_to_clock_t(now - READ_ONCE(stm->lastuse));
firstuse = READ_ONCE(stm->firstuse); dtm->firstuse = firstuse ? jiffies_to_clock_t(now - firstuse) : 0;
dtm->expires = jiffies_to_clock_t(READ_ONCE(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_BOUND 0#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 inlineint tc_action_net_init(struct net *net, struct tc_action_net *tn, const struct tc_action_ops *ops){ int err = 0;
tn->idrinfo = kmalloc_obj(*tn->idrinfo); 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;
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); }}
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[], int init_res[]);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);#define NET_ACT_ALIAS_PREFIX "net-act-"#define MODULE_ALIAS_NET_ACT(kind) MODULE_ALIAS(NET_ACT_ALIAS_PREFIX kind)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, u32 flags, 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);
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_cpu_drop_inc(a->cpu_qstats); return; } atomic_inc(&a->tcfa_drops);}
static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a){ if (likely(a->cpu_qstats)) { qstats_cpu_overlimit_inc(a->cpu_qstats); return; } atomic_inc(&a->tcfa_overlimits);}
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);
/* Range check for a control action supplied by user space. * * This is the same test tcf_action_check_ctrlact() applies to the primary * control action, factored out for the *fallback* control actions * (act_gact's TCA_GACT_PROB.paction and act_police's TCA_POLICE_RESULT), * which must not reach tcf_action_check_ctrlact() because they have no * goto_chain to allocate. Without it, user space can store kernel-internal * verdicts such as TC_ACT_CONSUMED, which is TC_ACT_VALUE_MAX + 1 and is * deliberately not part of the UAPI value range. */static inline bool tcf_action_valid(int action){ int opcode = TC_ACT_EXT_OPCODE(action);
if (!opcode) return action <= TC_ACT_VALUE_MAX; return opcode <= TC_ACT_EXT_OPCODE_MAX || action == TC_ACT_UNSPEC;}
#ifdef CONFIG_INETDECLARE_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