[mirror_ubuntu-kernels.git] / include / net / netfilter / nf_conntrack_timeout.h

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

#include <net/net_namespace.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <linux/refcount.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>

#define CTNL_TIMEOUT_NAME_MAX	32

struct ctnl_timeout {
	struct list_head	head;
	struct rcu_head		rcu_head;
	refcount_t		refcnt;
	char			name[CTNL_TIMEOUT_NAME_MAX];
	__u16			l3num;
	const struct nf_conntrack_l4proto *l4proto;
	char			data[0];
};

struct nf_conn_timeout {
	struct ctnl_timeout __rcu *timeout;
};

static inline unsigned int *
nf_ct_timeout_data(struct nf_conn_timeout *t)
{
	struct ctnl_timeout *timeout;

	timeout = rcu_dereference(t->timeout);
	if (timeout == NULL)
		return NULL;

	return (unsigned int *)timeout->data;
}

static inline
struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT);
#else
	return NULL;
#endif
}

static inline
struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct,
					      struct ctnl_timeout *timeout,
					      gfp_t gfp)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	struct nf_conn_timeout *timeout_ext;

	timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp);
	if (timeout_ext == NULL)
		return NULL;

	rcu_assign_pointer(timeout_ext->timeout, timeout);

	return timeout_ext;
#else
	return NULL;
#endif
};

static inline unsigned int *
nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct,
		     const struct nf_conntrack_l4proto *l4proto)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	struct nf_conn_timeout *timeout_ext;
	unsigned int *timeouts;

	timeout_ext = nf_ct_timeout_find(ct);
	if (timeout_ext) {
		timeouts = nf_ct_timeout_data(timeout_ext);
		if (unlikely(!timeouts))
			timeouts = l4proto->get_timeouts(net);
	} else {
		timeouts = l4proto->get_timeouts(net);
	}

	return timeouts;
#else
	return l4proto->get_timeouts(net);
#endif
}

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
int nf_conntrack_timeout_init(void);
void nf_conntrack_timeout_fini(void);
#else
static inline int nf_conntrack_timeout_init(void)
{
        return 0;
}

static inline void nf_conntrack_timeout_fini(void)
{
        return;
}
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */

#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name);
extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout);
#endif

#endif /* _NF_CONNTRACK_TIMEOUT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
dd705072 PNA	2	#ifndef _NF_CONNTRACK_TIMEOUT_H
	3	#define _NF_CONNTRACK_TIMEOUT_H
	4
	5	#include <net/net_namespace.h>
	6	#include <linux/netfilter/nf_conntrack_common.h>
	7	#include <linux/netfilter/nf_conntrack_tuple_common.h>
b54ab92b	8	#include <linux/refcount.h>
dd705072 PNA	9	#include <net/netfilter/nf_conntrack.h>
	10	#include <net/netfilter/nf_conntrack_extend.h>
	11
	12	#define CTNL_TIMEOUT_NAME_MAX 32
	13
	14	struct ctnl_timeout {
	15	struct list_head head;
	16	struct rcu_head rcu_head;
b54ab92b	17	refcount_t refcnt;
dd705072 PNA	18	char name[CTNL_TIMEOUT_NAME_MAX];
dd705072 PNA	19	__u16 l3num;
b3480fe0	20	const struct nf_conntrack_l4proto *l4proto;
dd705072 PNA	21	char data[0];
	22	};
	23
	24	struct nf_conn_timeout {
ae2d708e	25	struct ctnl_timeout __rcu *timeout;
dd705072 PNA	26	};
dd705072 PNA	27
ae2d708e PNA	28	static inline unsigned int *
	29	nf_ct_timeout_data(struct nf_conn_timeout *t)
	30	{
	31	struct ctnl_timeout *timeout;
	32
	33	timeout = rcu_dereference(t->timeout);
	34	if (timeout == NULL)
	35	return NULL;
	36
	37	return (unsigned int *)timeout->data;
	38	}
dd705072 PNA	39
	40	static inline
	41	struct nf_conn_timeout nf_ct_timeout_find(const struct nf_conn ct)
	42	{
	43	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	44	return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT);
	45	#else
	46	return NULL;
	47	#endif
	48	}
	49
	50	static inline
	51	struct nf_conn_timeout nf_ct_timeout_ext_add(struct nf_conn ct,
	52	struct ctnl_timeout *timeout,
	53	gfp_t gfp)
	54	{
	55	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	56	struct nf_conn_timeout *timeout_ext;
	57
	58	timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp);
	59	if (timeout_ext == NULL)
	60	return NULL;
	61
ae2d708e	62	rcu_assign_pointer(timeout_ext->timeout, timeout);
dd705072 PNA	63
	64	return timeout_ext;
	65	#else
	66	return NULL;
	67	#endif
	68	};
	69
84b5ee93 PNA	70	static inline unsigned int *
84b5ee93 PNA	71	nf_ct_timeout_lookup(struct net net, struct nf_conn ct,
2a04aabf	72	const struct nf_conntrack_l4proto *l4proto)
84b5ee93 PNA	73	{
	74	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
	75	struct nf_conn_timeout *timeout_ext;
	76	unsigned int *timeouts;
	77
	78	timeout_ext = nf_ct_timeout_find(ct);
ae2d708e PNA	79	if (timeout_ext) {
	80	timeouts = nf_ct_timeout_data(timeout_ext);
	81	if (unlikely(!timeouts))
	82	timeouts = l4proto->get_timeouts(net);
	83	} else {
84b5ee93	84	timeouts = l4proto->get_timeouts(net);
ae2d708e	85	}
84b5ee93 PNA	86
	87	return timeouts;
	88	#else
	89	return l4proto->get_timeouts(net);
	90	#endif
	91	}
	92
dd705072	93	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
4e77be46 JP	94	int nf_conntrack_timeout_init(void);
4e77be46 JP	95	void nf_conntrack_timeout_fini(void);
dd705072	96	#else
8684094c	97	static inline int nf_conntrack_timeout_init(void)
dd705072 PNA	98	{
	99	return 0;
	100	}
	101
8684094c	102	static inline void nf_conntrack_timeout_fini(void)
dd705072 PNA	103	{
	104	return;
	105	}
	106	#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
	107
	108	#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
19576c94	109	extern struct ctnl_timeout (nf_ct_timeout_find_get_hook)(struct net net, const char name);
dd705072 PNA	110	extern void (nf_ct_timeout_put_hook)(struct ctnl_timeout timeout);
	111	#endif
	112
	113	#endif /* _NF_CONNTRACK_TIMEOUT_H */