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 tcpm_hash_bucket;
15 struct ctl_table_header;
27 struct ping_group_range {
34 struct inet_timewait_death_row {
37 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
38 int sysctl_max_tw_buckets;
41 struct tcp_fastopen_context;
45 struct ctl_table_header *forw_hdr;
46 struct ctl_table_header *frags_hdr;
47 struct ctl_table_header *ipv4_hdr;
48 struct ctl_table_header *route_hdr;
49 struct ctl_table_header *xfrm4_hdr;
51 struct ipv4_devconf *devconf_all;
52 struct ipv4_devconf *devconf_dflt;
53 struct ip_ra_chain __rcu *ra_chain;
54 struct mutex ra_mutex;
55 #ifdef CONFIG_IP_MULTIPLE_TABLES
56 struct fib_rules_ops *rules_ops;
57 bool fib_has_custom_rules;
58 unsigned int fib_rules_require_fldissect;
59 struct fib_table __rcu *fib_main;
60 struct fib_table __rcu *fib_default;
62 bool fib_has_custom_local_routes;
63 #ifdef CONFIG_IP_ROUTE_CLASSID
64 int fib_num_tclassid_users;
66 struct hlist_head *fib_table_hash;
67 bool fib_offload_disabled;
70 struct sock * __percpu *icmp_sk;
71 struct sock *mc_autojoin_sk;
73 struct inet_peer_base *peers;
74 struct sock * __percpu *tcp_sk;
76 #ifdef CONFIG_NETFILTER
77 struct xt_table *iptable_filter;
78 struct xt_table *iptable_mangle;
79 struct xt_table *iptable_raw;
80 struct xt_table *arptable_filter;
81 #ifdef CONFIG_SECURITY
82 struct xt_table *iptable_security;
84 struct xt_table *nat_table;
87 int sysctl_icmp_echo_ignore_all;
88 int sysctl_icmp_echo_ignore_broadcasts;
89 int sysctl_icmp_ignore_bogus_error_responses;
90 int sysctl_icmp_ratelimit;
91 int sysctl_icmp_ratemask;
92 int sysctl_icmp_errors_use_inbound_ifaddr;
94 struct local_ports ip_local_ports;
97 int sysctl_tcp_ecn_fallback;
99 int sysctl_ip_default_ttl;
100 int sysctl_ip_no_pmtu_disc;
101 int sysctl_ip_fwd_use_pmtu;
102 int sysctl_ip_fwd_update_priority;
103 int sysctl_ip_nonlocal_bind;
104 int sysctl_ip_autobind_reuse;
105 /* Shall we try to damage output packets if routing dev changes? */
106 int sysctl_ip_dynaddr;
107 int sysctl_ip_early_demux;
108 #ifdef CONFIG_NET_L3_MASTER_DEV
109 int sysctl_raw_l3mdev_accept;
111 int sysctl_tcp_early_demux;
112 int sysctl_udp_early_demux;
114 int sysctl_nexthop_compat_mode;
116 int sysctl_fwmark_reflect;
117 int sysctl_tcp_fwmark_accept;
118 #ifdef CONFIG_NET_L3_MASTER_DEV
119 int sysctl_tcp_l3mdev_accept;
121 int sysctl_tcp_mtu_probing;
122 int sysctl_tcp_mtu_probe_floor;
123 int sysctl_tcp_base_mss;
124 int sysctl_tcp_min_snd_mss;
125 int sysctl_tcp_probe_threshold;
126 u32 sysctl_tcp_probe_interval;
128 int sysctl_tcp_keepalive_time;
129 int sysctl_tcp_keepalive_probes;
130 int sysctl_tcp_keepalive_intvl;
132 int sysctl_tcp_syn_retries;
133 int sysctl_tcp_synack_retries;
134 int sysctl_tcp_syncookies;
135 int sysctl_tcp_reordering;
136 int sysctl_tcp_retries1;
137 int sysctl_tcp_retries2;
138 int sysctl_tcp_orphan_retries;
139 int sysctl_tcp_fin_timeout;
140 unsigned int sysctl_tcp_notsent_lowat;
141 int sysctl_tcp_tw_reuse;
143 int sysctl_tcp_window_scaling;
144 int sysctl_tcp_timestamps;
145 int sysctl_tcp_early_retrans;
146 int sysctl_tcp_recovery;
147 int sysctl_tcp_thin_linear_timeouts;
148 int sysctl_tcp_slow_start_after_idle;
149 int sysctl_tcp_retrans_collapse;
150 int sysctl_tcp_stdurg;
151 int sysctl_tcp_rfc1337;
152 int sysctl_tcp_abort_on_overflow;
154 int sysctl_tcp_max_reordering;
155 int sysctl_tcp_dsack;
156 int sysctl_tcp_app_win;
157 int sysctl_tcp_adv_win_scale;
159 int sysctl_tcp_nometrics_save;
160 int sysctl_tcp_no_ssthresh_metrics_save;
161 int sysctl_tcp_moderate_rcvbuf;
162 int sysctl_tcp_tso_win_divisor;
163 int sysctl_tcp_workaround_signed_windows;
164 int sysctl_tcp_limit_output_bytes;
165 int sysctl_tcp_challenge_ack_limit;
166 int sysctl_tcp_min_tso_segs;
167 int sysctl_tcp_min_rtt_wlen;
168 int sysctl_tcp_autocorking;
169 int sysctl_tcp_invalid_ratelimit;
170 int sysctl_tcp_pacing_ss_ratio;
171 int sysctl_tcp_pacing_ca_ratio;
172 int sysctl_tcp_wmem[3];
173 int sysctl_tcp_rmem[3];
174 int sysctl_tcp_comp_sack_nr;
175 unsigned long sysctl_tcp_comp_sack_delay_ns;
176 unsigned long sysctl_tcp_comp_sack_slack_ns;
177 struct inet_timewait_death_row tcp_death_row;
178 int sysctl_max_syn_backlog;
179 int sysctl_tcp_fastopen;
180 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
181 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
182 spinlock_t tcp_fastopen_ctx_lock;
183 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
184 atomic_t tfo_active_disable_times;
185 unsigned long tfo_active_disable_stamp;
186 int sysctl_tcp_reflect_tos;
188 int sysctl_udp_wmem_min;
189 int sysctl_udp_rmem_min;
191 int sysctl_fib_notify_on_flag_change;
193 #ifdef CONFIG_NET_L3_MASTER_DEV
194 int sysctl_udp_l3mdev_accept;
197 int sysctl_igmp_max_memberships;
198 int sysctl_igmp_max_msf;
199 int sysctl_igmp_llm_reports;
202 struct ping_group_range ping_group_range;
204 atomic_t dev_addr_genid;
207 unsigned long *sysctl_local_reserved_ports;
208 int sysctl_ip_prot_sock;
211 #ifdef CONFIG_IP_MROUTE
212 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
213 struct mr_table *mrt;
215 struct list_head mr_tables;
216 struct fib_rules_ops *mr_rules_ops;
219 #ifdef CONFIG_IP_ROUTE_MULTIPATH
220 int sysctl_fib_multipath_use_neigh;
221 int sysctl_fib_multipath_hash_policy;
224 struct fib_notifier_ops *notifier_ops;
225 unsigned int fib_seq; /* protected by rtnl_mutex */
227 struct fib_notifier_ops *ipmr_notifier_ops;
228 unsigned int ipmr_seq; /* protected by rtnl_mutex */
231 siphash_key_t ip_id_key;