[linux-2.6-block.git] / include / linux / sock_diag.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SOCK_DIAG_H__
#define __SOCK_DIAG_H__

#include <linux/netlink.h>
#include <linux/user_namespace.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <uapi/linux/sock_diag.h>

struct sk_buff;
struct nlmsghdr;
struct sock;

struct sock_diag_handler {
	struct module *owner;
	__u8 family;
	int (*dump)(struct sk_buff *skb, struct nlmsghdr *nlh);
	int (*get_info)(struct sk_buff *skb, struct sock *sk);
	int (*destroy)(struct sk_buff *skb, struct nlmsghdr *nlh);
};

int sock_diag_register(const struct sock_diag_handler *h);
void sock_diag_unregister(const struct sock_diag_handler *h);

struct sock_diag_inet_compat {
	struct module *owner;
	int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh);
};

void sock_diag_register_inet_compat(const struct sock_diag_inet_compat *ptr);
void sock_diag_unregister_inet_compat(const struct sock_diag_inet_compat *ptr);

u64 __sock_gen_cookie(struct sock *sk);

static inline u64 sock_gen_cookie(struct sock *sk)
{
	u64 cookie;

	preempt_disable();
	cookie = __sock_gen_cookie(sk);
	preempt_enable();

	return cookie;
}

int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);

int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
			     struct sk_buff *skb, int attrtype);

static inline
enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
{
	switch (sk->sk_family) {
	case AF_INET:
		if (sk->sk_type == SOCK_RAW)
			return SKNLGRP_NONE;

		switch (sk->sk_protocol) {
		case IPPROTO_TCP:
			return SKNLGRP_INET_TCP_DESTROY;
		case IPPROTO_UDP:
			return SKNLGRP_INET_UDP_DESTROY;
		default:
			return SKNLGRP_NONE;
		}
	case AF_INET6:
		if (sk->sk_type == SOCK_RAW)
			return SKNLGRP_NONE;

		switch (sk->sk_protocol) {
		case IPPROTO_TCP:
			return SKNLGRP_INET6_TCP_DESTROY;
		case IPPROTO_UDP:
			return SKNLGRP_INET6_UDP_DESTROY;
		default:
			return SKNLGRP_NONE;
		}
	default:
		return SKNLGRP_NONE;
	}
}

static inline
bool sock_diag_has_destroy_listeners(const struct sock *sk)
{
	const struct net *n = sock_net(sk);
	const enum sknetlink_groups group = sock_diag_destroy_group(sk);

	return group != SKNLGRP_NONE && n->diag_nlsk &&
		netlink_has_listeners(n->diag_nlsk, group);
}
void sock_diag_broadcast_destroy(struct sock *sk);

int sock_diag_destroy(struct sock *sk, int err);
#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
d366477a PE	2	#ifndef __SOCK_DIAG_H__
d366477a PE	3	#define __SOCK_DIAG_H__
e7c466e5	4
eb4cb008	5	#include <linux/netlink.h>
e8d9612c	6	#include <linux/user_namespace.h>
eb4cb008 CG	7	#include <net/net_namespace.h>
eb4cb008 CG	8	#include <net/sock.h>
607ca46e	9	#include <uapi/linux/sock_diag.h>
e7c466e5	10
e6fe2371 PE	11	struct sk_buff;
e6fe2371 PE	12	struct nlmsghdr;
5d2e5f27	13	struct sock;
e6fe2371	14
d366477a	15	struct sock_diag_handler {
114b4bb1	16	struct module *owner;
d366477a PE	17	__u8 family;
d366477a PE	18	int (dump)(struct sk_buff skb, struct nlmsghdr *nlh);
eb4cb008	19	int (get_info)(struct sk_buff skb, struct sock *sk);
64be0aed	20	int (destroy)(struct sk_buff skb, struct nlmsghdr *nlh);
d366477a PE	21	};
d366477a PE	22
8dcf01fc SW	23	int sock_diag_register(const struct sock_diag_handler *h);
8dcf01fc SW	24	void sock_diag_unregister(const struct sock_diag_handler *h);
d366477a	25
86e8921d ED	26	struct sock_diag_inet_compat {
	27	struct module *owner;
	28	int (fn)(struct sk_buff skb, struct nlmsghdr *nlh);
	29	};
	30
	31	void sock_diag_register_inet_compat(const struct sock_diag_inet_compat *ptr);
	32	void sock_diag_unregister_inet_compat(const struct sock_diag_inet_compat *ptr);
d366477a	33
92acdc58 DB	34	u64 __sock_gen_cookie(struct sock *sk);
	35
	36	static inline u64 sock_gen_cookie(struct sock *sk)
	37	{
	38	u64 cookie;
	39
	40	preempt_disable();
	41	cookie = __sock_gen_cookie(sk);
	42	preempt_enable();
	43
	44	return cookie;
	45	}
	46
33cf7c90 ED	47	int sock_diag_check_cookie(struct sock sk, const __u32 cookie);
33cf7c90 ED	48	void sock_diag_save_cookie(struct sock sk, __u32 cookie);
f65c1b53	49
5d2e5f27	50	int sock_diag_put_meminfo(struct sock sk, struct sk_buff skb, int attr);
a53b72c8	51	int sock_diag_put_filterinfo(bool may_report_filterinfo, struct sock *sk,
e8d9612c	52	struct sk_buff *skb, int attrtype);
5d2e5f27	53
eb4cb008 CG	54	static inline
	55	enum sknetlink_groups sock_diag_destroy_group(const struct sock *sk)
	56	{
	57	switch (sk->sk_family) {
	58	case AF_INET:
9a0fee2b WB	59	if (sk->sk_type == SOCK_RAW)
	60	return SKNLGRP_NONE;
	61
eb4cb008 CG	62	switch (sk->sk_protocol) {
	63	case IPPROTO_TCP:
	64	return SKNLGRP_INET_TCP_DESTROY;
	65	case IPPROTO_UDP:
	66	return SKNLGRP_INET_UDP_DESTROY;
	67	default:
	68	return SKNLGRP_NONE;
	69	}
	70	case AF_INET6:
9a0fee2b WB	71	if (sk->sk_type == SOCK_RAW)
	72	return SKNLGRP_NONE;
	73
eb4cb008 CG	74	switch (sk->sk_protocol) {
	75	case IPPROTO_TCP:
	76	return SKNLGRP_INET6_TCP_DESTROY;
	77	case IPPROTO_UDP:
	78	return SKNLGRP_INET6_UDP_DESTROY;
	79	default:
	80	return SKNLGRP_NONE;
	81	}
	82	default:
	83	return SKNLGRP_NONE;
	84	}
	85	}
	86
	87	static inline
	88	bool sock_diag_has_destroy_listeners(const struct sock *sk)
	89	{
	90	const struct net *n = sock_net(sk);
	91	const enum sknetlink_groups group = sock_diag_destroy_group(sk);
	92
	93	return group != SKNLGRP_NONE && n->diag_nlsk &&
	94	netlink_has_listeners(n->diag_nlsk, group);
	95	}
	96	void sock_diag_broadcast_destroy(struct sock *sk);
	97
64be0aed	98	int sock_diag_destroy(struct sock *sk, int err);
d366477a	99	#endif