include/net/tc_act/tc_tunnel_key.h

Source file repositories/reference/linux-study-clean/include/net/tc_act/tc_tunnel_key.h

File Facts

System
Linux kernel
Corpus path
include/net/tc_act/tc_tunnel_key.h
Extension
.h
Size
2179 bytes
Lines
88
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

struct tcf_tunnel_key_params {
	struct rcu_head		rcu;
	int			tcft_action;
	int			action;
	struct metadata_dst     *tcft_enc_metadata;
};

struct tcf_tunnel_key {
	struct tc_action	      common;
	struct tcf_tunnel_key_params __rcu *params;
};

#define to_tunnel_key(a) ((struct tcf_tunnel_key *)a)

static inline bool is_tcf_tunnel_set(const struct tc_action *a)
{
#ifdef CONFIG_NET_CLS_ACT
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;

	params = rcu_dereference_protected(t->params,
					   lockdep_is_held(&a->tcfa_lock));
	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
		return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
#endif
	return false;
}

static inline bool is_tcf_tunnel_release(const struct tc_action *a)
{
#ifdef CONFIG_NET_CLS_ACT
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;

	params = rcu_dereference_protected(t->params,
					   lockdep_is_held(&a->tcfa_lock));
	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
		return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
#endif
	return false;
}

static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
{
#ifdef CONFIG_NET_CLS_ACT
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;

	params = rcu_dereference_protected(t->params,
					   lockdep_is_held(&a->tcfa_lock));

	return &params->tcft_enc_metadata->u.tun_info;
#else
	return NULL;
#endif
}

static inline struct ip_tunnel_info *
tcf_tunnel_info_copy(const struct tc_action *a)
{
#ifdef CONFIG_NET_CLS_ACT
	struct ip_tunnel_info *tun = tcf_tunnel_info(a);

	if (tun) {
		size_t tun_size = sizeof(*tun) + tun->options_len;
		struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
							  GFP_ATOMIC);

		return tun_copy;
	}
#endif
	return NULL;
}
#endif /* __NET_TC_TUNNEL_KEY_H */

Annotation

Implementation Notes