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 {
35 char tw_pad[L1_CACHE_BYTES - sizeof(atomic_t)];
37 struct inet_hashinfo *hashinfo;
38 int sysctl_max_tw_buckets;
41 struct tcp_fastopen_context;
44 /* Please keep tcp_death_row at first field in netns_ipv4 */
45 struct inet_timewait_death_row tcp_death_row ____cacheline_aligned_in_smp;
48 struct ctl_table_header *forw_hdr;
49 struct ctl_table_header *frags_hdr;
50 struct ctl_table_header *ipv4_hdr;
51 struct ctl_table_header *route_hdr;
52 struct ctl_table_header *xfrm4_hdr;
54 struct ipv4_devconf *devconf_all;
55 struct ipv4_devconf *devconf_dflt;
56 struct ip_ra_chain __rcu *ra_chain;
57 struct mutex ra_mutex;
58 #ifdef CONFIG_IP_MULTIPLE_TABLES
59 struct fib_rules_ops *rules_ops;
60 struct fib_table __rcu *fib_main;
61 struct fib_table __rcu *fib_default;
62 unsigned int fib_rules_require_fldissect;
63 bool fib_has_custom_rules;
65 bool fib_has_custom_local_routes;
66 bool fib_offload_disabled;
67 #ifdef CONFIG_IP_ROUTE_CLASSID
68 int fib_num_tclassid_users;
70 struct hlist_head *fib_table_hash;
73 struct sock * __percpu *icmp_sk;
74 struct sock *mc_autojoin_sk;
76 struct inet_peer_base *peers;
77 struct sock * __percpu *tcp_sk;
79 #ifdef CONFIG_NETFILTER
80 struct xt_table *iptable_filter;
81 struct xt_table *iptable_mangle;
82 struct xt_table *iptable_raw;
83 struct xt_table *arptable_filter;
84 #ifdef CONFIG_SECURITY
85 struct xt_table *iptable_security;
87 struct xt_table *nat_table;
90 u8 sysctl_icmp_echo_ignore_all;
91 u8 sysctl_icmp_echo_enable_probe;
92 u8 sysctl_icmp_echo_ignore_broadcasts;
93 u8 sysctl_icmp_ignore_bogus_error_responses;
94 u8 sysctl_icmp_errors_use_inbound_ifaddr;
95 int sysctl_icmp_ratelimit;
96 int sysctl_icmp_ratemask;
98 struct local_ports ip_local_ports;
101 u8 sysctl_tcp_ecn_fallback;
103 u8 sysctl_ip_default_ttl;
104 u8 sysctl_ip_no_pmtu_disc;
105 u8 sysctl_ip_fwd_use_pmtu;
106 u8 sysctl_ip_fwd_update_priority;
107 u8 sysctl_ip_nonlocal_bind;
108 u8 sysctl_ip_autobind_reuse;
109 /* Shall we try to damage output packets if routing dev changes? */
110 u8 sysctl_ip_dynaddr;
111 u8 sysctl_ip_early_demux;
112 #ifdef CONFIG_NET_L3_MASTER_DEV
113 u8 sysctl_raw_l3mdev_accept;
115 u8 sysctl_tcp_early_demux;
116 u8 sysctl_udp_early_demux;
118 u8 sysctl_nexthop_compat_mode;
120 u8 sysctl_fwmark_reflect;
121 u8 sysctl_tcp_fwmark_accept;
122 #ifdef CONFIG_NET_L3_MASTER_DEV
123 u8 sysctl_tcp_l3mdev_accept;
125 u8 sysctl_tcp_mtu_probing;
126 int sysctl_tcp_mtu_probe_floor;
127 int sysctl_tcp_base_mss;
128 int sysctl_tcp_min_snd_mss;
129 int sysctl_tcp_probe_threshold;
130 u32 sysctl_tcp_probe_interval;
132 int sysctl_tcp_keepalive_time;
133 int sysctl_tcp_keepalive_intvl;
134 u8 sysctl_tcp_keepalive_probes;
136 u8 sysctl_tcp_syn_retries;
137 u8 sysctl_tcp_synack_retries;
138 u8 sysctl_tcp_syncookies;
139 int sysctl_tcp_reordering;
140 u8 sysctl_tcp_retries1;
141 u8 sysctl_tcp_retries2;
142 u8 sysctl_tcp_orphan_retries;
143 u8 sysctl_tcp_tw_reuse;
144 int sysctl_tcp_fin_timeout;
145 unsigned int sysctl_tcp_notsent_lowat;
147 u8 sysctl_tcp_window_scaling;
148 u8 sysctl_tcp_timestamps;
149 u8 sysctl_tcp_early_retrans;
150 u8 sysctl_tcp_recovery;
151 u8 sysctl_tcp_thin_linear_timeouts;
152 u8 sysctl_tcp_slow_start_after_idle;
153 u8 sysctl_tcp_retrans_collapse;
154 u8 sysctl_tcp_stdurg;
155 u8 sysctl_tcp_rfc1337;
156 u8 sysctl_tcp_abort_on_overflow;
157 u8 sysctl_tcp_fack; /* obsolete */
158 int sysctl_tcp_max_reordering;
159 int sysctl_tcp_adv_win_scale;
161 u8 sysctl_tcp_app_win;
163 u8 sysctl_tcp_nometrics_save;
164 u8 sysctl_tcp_no_ssthresh_metrics_save;
165 u8 sysctl_tcp_moderate_rcvbuf;
166 u8 sysctl_tcp_tso_win_divisor;
167 u8 sysctl_tcp_workaround_signed_windows;
168 int sysctl_tcp_limit_output_bytes;
169 int sysctl_tcp_challenge_ack_limit;
170 int sysctl_tcp_min_rtt_wlen;
171 u8 sysctl_tcp_min_tso_segs;
172 u8 sysctl_tcp_autocorking;
173 u8 sysctl_tcp_reflect_tos;
174 int sysctl_tcp_invalid_ratelimit;
175 int sysctl_tcp_pacing_ss_ratio;
176 int sysctl_tcp_pacing_ca_ratio;
177 int sysctl_tcp_wmem[3];
178 int sysctl_tcp_rmem[3];
179 int sysctl_tcp_comp_sack_nr;
180 unsigned long sysctl_tcp_comp_sack_delay_ns;
181 unsigned long sysctl_tcp_comp_sack_slack_ns;
182 int sysctl_max_syn_backlog;
183 int sysctl_tcp_fastopen;
184 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
185 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
186 spinlock_t tcp_fastopen_ctx_lock;
187 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
188 atomic_t tfo_active_disable_times;
189 unsigned long tfo_active_disable_stamp;
191 int sysctl_udp_wmem_min;
192 int sysctl_udp_rmem_min;
194 u8 sysctl_fib_notify_on_flag_change;
196 #ifdef CONFIG_NET_L3_MASTER_DEV
197 int sysctl_udp_l3mdev_accept;
200 int sysctl_igmp_max_memberships;
201 int sysctl_igmp_max_msf;
202 int sysctl_igmp_llm_reports;
205 struct ping_group_range ping_group_range;
207 atomic_t dev_addr_genid;
210 unsigned long *sysctl_local_reserved_ports;
211 int sysctl_ip_prot_sock;
214 #ifdef CONFIG_IP_MROUTE
215 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
216 struct mr_table *mrt;
218 struct list_head mr_tables;
219 struct fib_rules_ops *mr_rules_ops;
222 #ifdef CONFIG_IP_ROUTE_MULTIPATH
223 int sysctl_fib_multipath_use_neigh;
224 int sysctl_fib_multipath_hash_policy;
227 struct fib_notifier_ops *notifier_ops;
228 unsigned int fib_seq; /* protected by rtnl_mutex */
230 struct fib_notifier_ops *ipmr_notifier_ops;
231 unsigned int ipmr_seq; /* protected by rtnl_mutex */
234 siphash_key_t ip_id_key;