include/net/psample.h

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

File Facts

System
Linux kernel
Corpus path
include/net/psample.h
Extension
.h
Size
1180 bytes
Lines
57
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 psample_group {
	struct list_head list;
	struct net *net;
	u32 group_num;
	u32 refcount;
	u32 seq;
	struct rcu_head rcu;
};

struct psample_metadata {
	u32 trunc_size;
	int in_ifindex;
	int out_ifindex;
	u16 out_tc;
	u64 out_tc_occ;	/* bytes */
	u64 latency;	/* nanoseconds */
	u8 out_tc_valid:1,
	   out_tc_occ_valid:1,
	   latency_valid:1,
	   rate_as_probability:1,
	   unused:4;
	const u8 *user_cookie;
	u32 user_cookie_len;
};

struct psample_group *psample_group_get(struct net *net, u32 group_num);
void psample_group_take(struct psample_group *group);
void psample_group_put(struct psample_group *group);

struct sk_buff;

#if IS_ENABLED(CONFIG_PSAMPLE)

void psample_sample_packet(struct psample_group *group,
			   const struct sk_buff *skb, u32 sample_rate,
			   const struct psample_metadata *md);

#else

static inline void psample_sample_packet(struct psample_group *group,
					 const struct sk_buff *skb,
					 u32 sample_rate,
					 const struct psample_metadata *md)
{
}

#endif

#endif /* __NET_PSAMPLE_H */

Annotation

Implementation Notes