drivers/net/wireguard/allowedips.h

Source file repositories/reference/linux-study-clean/drivers/net/wireguard/allowedips.h

File Facts

System
Linux kernel
Corpus path
drivers/net/wireguard/allowedips.h
Extension
.h
Size
2153 bytes
Lines
64
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct allowedips_node {
	struct wg_peer __rcu *peer;
	struct allowedips_node __rcu *bit[2];
	u8 cidr, bit_at_a, bit_at_b, bitlen;
	u8 bits[16] __aligned(__alignof(u64));

	/* Keep rarely used members at bottom to be beyond cache line. */
	unsigned long parent_bit_packed;
	union {
		struct list_head peer_list;
		struct rcu_head rcu;
	};
};

struct allowedips {
	struct allowedips_node __rcu *root4;
	struct allowedips_node __rcu *root6;
	u64 seq;
} __aligned(4); /* We pack the lower 2 bits of &root, but m68k only gives 16-bit alignment. */

void wg_allowedips_init(struct allowedips *table);
void wg_allowedips_free(struct allowedips *table, struct mutex *mutex);
int wg_allowedips_insert_v4(struct allowedips *table, const struct in_addr *ip,
			    u8 cidr, struct wg_peer *peer, struct mutex *lock);
int wg_allowedips_insert_v6(struct allowedips *table, const struct in6_addr *ip,
			    u8 cidr, struct wg_peer *peer, struct mutex *lock);
int wg_allowedips_remove_v4(struct allowedips *table, const struct in_addr *ip,
			    u8 cidr, struct wg_peer *peer, struct mutex *lock);
int wg_allowedips_remove_v6(struct allowedips *table, const struct in6_addr *ip,
			    u8 cidr, struct wg_peer *peer, struct mutex *lock);
void wg_allowedips_remove_by_peer(struct allowedips *table,
				  struct wg_peer *peer, struct mutex *lock);
/* The ip input pointer should be __aligned(__alignof(u64))) */
int wg_allowedips_read_node(struct allowedips_node *node, u8 ip[16], u8 *cidr);

/* These return a strong reference to a peer: */
struct wg_peer *wg_allowedips_lookup_dst(struct allowedips *table,
					 struct sk_buff *skb);
struct wg_peer *wg_allowedips_lookup_src(struct allowedips *table,
					 struct sk_buff *skb);

#ifdef DEBUG
bool wg_allowedips_selftest(void);
#endif

int wg_allowedips_slab_init(void);
void wg_allowedips_slab_uninit(void);

#endif /* _WG_ALLOWEDIPS_H */

Annotation

Implementation Notes