1 /* SPDX-License-Identifier: GPL-2.0 */
3 * ipv4 in net namespaces
6 #ifndef __NETNS_IPV4_H__
7 #define __NETNS_IPV4_H__
9 #include <linux/uidgid.h>
10 #include <net/inet_frag.h>
11 #include <linux/rcupdate.h>
12 #include <linux/siphash.h>
14 struct ctl_table_header;
26 struct ping_group_range {
33 struct inet_timewait_death_row {
36 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
37 int sysctl_max_tw_buckets;
40 struct tcp_fastopen_context;
44 struct ctl_table_header *forw_hdr;
45 struct ctl_table_header *frags_hdr;
46 struct ctl_table_header *ipv4_hdr;
47 struct ctl_table_header *route_hdr;
48 struct ctl_table_header *xfrm4_hdr;
50 struct ipv4_devconf *devconf_all;
51 struct ipv4_devconf *devconf_dflt;
52 struct ip_ra_chain __rcu *ra_chain;
53 struct mutex ra_mutex;
54 #ifdef CONFIG_IP_MULTIPLE_TABLES
55 struct fib_rules_ops *rules_ops;
56 bool fib_has_custom_rules;
57 unsigned int fib_rules_require_fldissect;
58 struct fib_table __rcu *fib_main;
59 struct fib_table __rcu *fib_default;
61 bool fib_has_custom_local_routes;
62 #ifdef CONFIG_IP_ROUTE_CLASSID
63 int fib_num_tclassid_users;
65 struct hlist_head *fib_table_hash;
66 bool fib_offload_disabled;
69 struct sock * __percpu *icmp_sk;
70 struct sock *mc_autojoin_sk;
72 struct inet_peer_base *peers;
73 struct sock * __percpu *tcp_sk;
75 #ifdef CONFIG_NETFILTER
76 struct xt_table *iptable_filter;
77 struct xt_table *iptable_mangle;
78 struct xt_table *iptable_raw;
79 struct xt_table *arptable_filter;
80 #ifdef CONFIG_SECURITY
81 struct xt_table *iptable_security;
83 struct xt_table *nat_table;
86 int sysctl_icmp_echo_ignore_all;
87 int sysctl_icmp_echo_ignore_broadcasts;
88 int sysctl_icmp_ignore_bogus_error_responses;
89 int sysctl_icmp_ratelimit;
90 int sysctl_icmp_ratemask;
91 int sysctl_icmp_errors_use_inbound_ifaddr;
93 struct local_ports ip_local_ports;
96 int sysctl_tcp_ecn_fallback;
98 int sysctl_ip_default_ttl;
99 int sysctl_ip_no_pmtu_disc;
100 int sysctl_ip_fwd_use_pmtu;
101 int sysctl_ip_fwd_update_priority;
102 int sysctl_ip_nonlocal_bind;
103 int sysctl_ip_autobind_reuse;
104 /* Shall we try to damage output packets if routing dev changes? */
105 int sysctl_ip_dynaddr;
106 int sysctl_ip_early_demux;
107 #ifdef CONFIG_NET_L3_MASTER_DEV
108 int sysctl_raw_l3mdev_accept;
110 int sysctl_tcp_early_demux;
111 int sysctl_udp_early_demux;
113 int sysctl_nexthop_compat_mode;
115 int sysctl_fwmark_reflect;
116 int sysctl_tcp_fwmark_accept;
117 #ifdef CONFIG_NET_L3_MASTER_DEV
118 int sysctl_tcp_l3mdev_accept;
120 int sysctl_tcp_mtu_probing;
121 int sysctl_tcp_mtu_probe_floor;
122 int sysctl_tcp_base_mss;
123 int sysctl_tcp_min_snd_mss;
124 int sysctl_tcp_probe_threshold;
125 u32 sysctl_tcp_probe_interval;
127 int sysctl_tcp_keepalive_time;
128 int sysctl_tcp_keepalive_probes;
129 int sysctl_tcp_keepalive_intvl;
131 int sysctl_tcp_syn_retries;
132 int sysctl_tcp_synack_retries;
133 int sysctl_tcp_syncookies;
134 int sysctl_tcp_reordering;
135 int sysctl_tcp_retries1;
136 int sysctl_tcp_retries2;
137 int sysctl_tcp_orphan_retries;
138 int sysctl_tcp_fin_timeout;
139 unsigned int sysctl_tcp_notsent_lowat;
140 int sysctl_tcp_tw_reuse;
142 int sysctl_tcp_window_scaling;
143 int sysctl_tcp_timestamps;
144 int sysctl_tcp_early_retrans;
145 int sysctl_tcp_recovery;
146 int sysctl_tcp_thin_linear_timeouts;
147 int sysctl_tcp_slow_start_after_idle;
148 int sysctl_tcp_retrans_collapse;
149 int sysctl_tcp_stdurg;
150 int sysctl_tcp_rfc1337;
151 int sysctl_tcp_abort_on_overflow;
153 int sysctl_tcp_max_reordering;
154 int sysctl_tcp_dsack;
155 int sysctl_tcp_app_win;
156 int sysctl_tcp_adv_win_scale;
158 int sysctl_tcp_nometrics_save;
159 int sysctl_tcp_no_ssthresh_metrics_save;
160 int sysctl_tcp_moderate_rcvbuf;
161 int sysctl_tcp_tso_win_divisor;
162 int sysctl_tcp_workaround_signed_windows;
163 int sysctl_tcp_limit_output_bytes;
164 int sysctl_tcp_challenge_ack_limit;
165 int sysctl_tcp_min_tso_segs;
166 int sysctl_tcp_min_rtt_wlen;
167 int sysctl_tcp_autocorking;
168 int sysctl_tcp_invalid_ratelimit;
169 int sysctl_tcp_pacing_ss_ratio;
170 int sysctl_tcp_pacing_ca_ratio;
171 int sysctl_tcp_wmem[3];
172 int sysctl_tcp_rmem[3];
173 int sysctl_tcp_comp_sack_nr;
174 unsigned long sysctl_tcp_comp_sack_delay_ns;
175 unsigned long sysctl_tcp_comp_sack_slack_ns;
176 struct inet_timewait_death_row tcp_death_row;
177 int sysctl_max_syn_backlog;
178 int sysctl_tcp_fastopen;
179 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
180 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
181 spinlock_t tcp_fastopen_ctx_lock;
182 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
183 atomic_t tfo_active_disable_times;
184 unsigned long tfo_active_disable_stamp;
185 int sysctl_tcp_reflect_tos;
187 int sysctl_udp_wmem_min;
188 int sysctl_udp_rmem_min;
190 int sysctl_fib_notify_on_flag_change;
192 #ifdef CONFIG_NET_L3_MASTER_DEV
193 int sysctl_udp_l3mdev_accept;
196 int sysctl_igmp_max_memberships;
197 int sysctl_igmp_max_msf;
198 int sysctl_igmp_llm_reports;
201 struct ping_group_range ping_group_range;
203 atomic_t dev_addr_genid;
206 unsigned long *sysctl_local_reserved_ports;
207 int sysctl_ip_prot_sock;
210 #ifdef CONFIG_IP_MROUTE
211 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
212 struct mr_table *mrt;
214 struct list_head mr_tables;
215 struct fib_rules_ops *mr_rules_ops;
218 #ifdef CONFIG_IP_ROUTE_MULTIPATH
219 int sysctl_fib_multipath_use_neigh;
220 int sysctl_fib_multipath_hash_policy;
223 struct fib_notifier_ops *notifier_ops;
224 unsigned int fib_seq; /* protected by rtnl_mutex */
226 struct fib_notifier_ops *ipmr_notifier_ops;
227 unsigned int ipmr_seq; /* protected by rtnl_mutex */
230 siphash_key_t ip_id_key;