mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-21 10:05:00 +08:00
2794cdb0b9
At this time, every new conntrack gets the 'event cache extension' enabled for it. This is because the 'net.netfilter.nf_conntrack_events' sysctl defaults to 1. Changing the default to 0 means that commands that rely on the event notification extension, e.g. 'conntrack -E' or conntrackd, stop working. We COULD detect if there is a listener by means of 'nfnetlink_has_listeners()' and only add the extension if this is true. The downside is a dependency from conntrack module to nfnetlink module. This adds a different way: inc/dec a counter whenever a ctnetlink group is being (un)subscribed and toggle a flag in struct net. Next patches will take advantage of this and will only add the event extension if the flag is set. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
116 lines
2.3 KiB
C
116 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __NETNS_CONNTRACK_H
|
|
#define __NETNS_CONNTRACK_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/list_nulls.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/netfilter/nf_conntrack_tcp.h>
|
|
#ifdef CONFIG_NF_CT_PROTO_DCCP
|
|
#include <linux/netfilter/nf_conntrack_dccp.h>
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_SCTP
|
|
#include <linux/netfilter/nf_conntrack_sctp.h>
|
|
#endif
|
|
#include <linux/seqlock.h>
|
|
|
|
struct ctl_table_header;
|
|
struct nf_conntrack_ecache;
|
|
|
|
struct nf_generic_net {
|
|
unsigned int timeout;
|
|
};
|
|
|
|
struct nf_tcp_net {
|
|
unsigned int timeouts[TCP_CONNTRACK_TIMEOUT_MAX];
|
|
u8 tcp_loose;
|
|
u8 tcp_be_liberal;
|
|
u8 tcp_max_retrans;
|
|
u8 tcp_ignore_invalid_rst;
|
|
#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
|
|
unsigned int offload_timeout;
|
|
#endif
|
|
};
|
|
|
|
enum udp_conntrack {
|
|
UDP_CT_UNREPLIED,
|
|
UDP_CT_REPLIED,
|
|
UDP_CT_MAX
|
|
};
|
|
|
|
struct nf_udp_net {
|
|
unsigned int timeouts[UDP_CT_MAX];
|
|
#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
|
|
unsigned int offload_timeout;
|
|
#endif
|
|
};
|
|
|
|
struct nf_icmp_net {
|
|
unsigned int timeout;
|
|
};
|
|
|
|
#ifdef CONFIG_NF_CT_PROTO_DCCP
|
|
struct nf_dccp_net {
|
|
u8 dccp_loose;
|
|
unsigned int dccp_timeout[CT_DCCP_MAX + 1];
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_NF_CT_PROTO_SCTP
|
|
struct nf_sctp_net {
|
|
unsigned int timeouts[SCTP_CONNTRACK_MAX];
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_NF_CT_PROTO_GRE
|
|
enum gre_conntrack {
|
|
GRE_CT_UNREPLIED,
|
|
GRE_CT_REPLIED,
|
|
GRE_CT_MAX
|
|
};
|
|
|
|
struct nf_gre_net {
|
|
struct list_head keymap_list;
|
|
unsigned int timeouts[GRE_CT_MAX];
|
|
};
|
|
#endif
|
|
|
|
struct nf_ip_net {
|
|
struct nf_generic_net generic;
|
|
struct nf_tcp_net tcp;
|
|
struct nf_udp_net udp;
|
|
struct nf_icmp_net icmp;
|
|
struct nf_icmp_net icmpv6;
|
|
#ifdef CONFIG_NF_CT_PROTO_DCCP
|
|
struct nf_dccp_net dccp;
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_SCTP
|
|
struct nf_sctp_net sctp;
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_GRE
|
|
struct nf_gre_net gre;
|
|
#endif
|
|
};
|
|
|
|
struct netns_ct {
|
|
#ifdef CONFIG_NF_CONNTRACK_EVENTS
|
|
bool ctnetlink_has_listener;
|
|
bool ecache_dwork_pending;
|
|
#endif
|
|
u8 sysctl_log_invalid; /* Log invalid packets */
|
|
u8 sysctl_events;
|
|
u8 sysctl_acct;
|
|
u8 sysctl_auto_assign_helper;
|
|
u8 sysctl_tstamp;
|
|
u8 sysctl_checksum;
|
|
|
|
struct ip_conntrack_stat __percpu *stat;
|
|
struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
|
|
struct nf_ip_net nf_ct_proto;
|
|
#if defined(CONFIG_NF_CONNTRACK_LABELS)
|
|
unsigned int labels_used;
|
|
#endif
|
|
};
|
|
#endif
|