linux/net/netfilter/nf_conntrack_extend.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Structure dynamic extension infrastructure
 * Copyright (C) 2004 Rusty Russell IBM Corporation
 * Copyright (C) 2007 Netfilter Core Team <[email protected]>
 * Copyright (C) 2007 USAGI/WIDE Project <http://www.linux-ipv6.org>
 */
#include <linux/kernel.h>
#include <linux/kmemleak.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/rcupdate.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack_extend.h>

#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_seqadj.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_timestamp.h>
#include <net/netfilter/nf_conntrack_timeout.h>
#include <net/netfilter/nf_conntrack_labels.h>
#include <net/netfilter/nf_conntrack_synproxy.h>
#include <net/netfilter/nf_conntrack_act_ct.h>
#include <net/netfilter/nf_nat.h>

#define NF_CT_EXT_PREALLOC …

atomic_t nf_conntrack_ext_genid __read_mostly = …;

static const u8 nf_ct_ext_type_len[NF_CT_EXT_NUM] = …;

static __always_inline unsigned int total_extension_size(void)
{ … }

void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
{ … }
EXPORT_SYMBOL(…);

/* Use nf_ct_ext_find wrapper. This is only useful for unconfirmed entries. */
void *__nf_ct_ext_find(const struct nf_ct_ext *ext, u8 id)
{ … }
EXPORT_SYMBOL(…);

void nf_ct_ext_bump_genid(void)
{ … }