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/seqlock.h>
13 #include <linux/siphash.h>
15 struct ctl_table_header;
27 struct ping_group_range {
34 struct inet_timewait_death_row {
35 refcount_t tw_refcount;
37 /* Padding to avoid false sharing, tw_refcount can be often written */
38 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
39 int sysctl_max_tw_buckets;
42 struct tcp_fastopen_context;
45 struct inet_timewait_death_row tcp_death_row;
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 atomic_t fib_num_tclassid_users;
70 struct hlist_head *fib_table_hash;
73 struct sock *mc_autojoin_sk;
75 struct inet_peer_base *peers;
78 u8 sysctl_icmp_echo_ignore_all;
79 u8 sysctl_icmp_echo_enable_probe;
80 u8 sysctl_icmp_echo_ignore_broadcasts;
81 u8 sysctl_icmp_ignore_bogus_error_responses;
82 u8 sysctl_icmp_errors_use_inbound_ifaddr;
83 int sysctl_icmp_ratelimit;
84 int sysctl_icmp_ratemask;
87 int ip_rt_mtu_expires;
90 struct local_ports ip_local_ports;
93 u8 sysctl_tcp_ecn_fallback;
95 u8 sysctl_ip_default_ttl;
96 u8 sysctl_ip_no_pmtu_disc;
97 u8 sysctl_ip_fwd_use_pmtu;
98 u8 sysctl_ip_fwd_update_priority;
99 u8 sysctl_ip_nonlocal_bind;
100 u8 sysctl_ip_autobind_reuse;
101 /* Shall we try to damage output packets if routing dev changes? */
102 u8 sysctl_ip_dynaddr;
103 u8 sysctl_ip_early_demux;
104 #ifdef CONFIG_NET_L3_MASTER_DEV
105 u8 sysctl_raw_l3mdev_accept;
107 u8 sysctl_tcp_early_demux;
108 u8 sysctl_udp_early_demux;
110 u8 sysctl_nexthop_compat_mode;
112 u8 sysctl_fwmark_reflect;
113 u8 sysctl_tcp_fwmark_accept;
114 #ifdef CONFIG_NET_L3_MASTER_DEV
115 u8 sysctl_tcp_l3mdev_accept;
117 u8 sysctl_tcp_mtu_probing;
118 int sysctl_tcp_mtu_probe_floor;
119 int sysctl_tcp_base_mss;
120 int sysctl_tcp_min_snd_mss;
121 int sysctl_tcp_probe_threshold;
122 u32 sysctl_tcp_probe_interval;
124 int sysctl_tcp_keepalive_time;
125 int sysctl_tcp_keepalive_intvl;
126 u8 sysctl_tcp_keepalive_probes;
128 u8 sysctl_tcp_syn_retries;
129 u8 sysctl_tcp_synack_retries;
130 u8 sysctl_tcp_syncookies;
131 u8 sysctl_tcp_migrate_req;
132 u8 sysctl_tcp_comp_sack_nr;
133 int sysctl_tcp_reordering;
134 u8 sysctl_tcp_retries1;
135 u8 sysctl_tcp_retries2;
136 u8 sysctl_tcp_orphan_retries;
137 u8 sysctl_tcp_tw_reuse;
138 int sysctl_tcp_fin_timeout;
139 unsigned int sysctl_tcp_notsent_lowat;
141 u8 sysctl_tcp_window_scaling;
142 u8 sysctl_tcp_timestamps;
143 u8 sysctl_tcp_early_retrans;
144 u8 sysctl_tcp_recovery;
145 u8 sysctl_tcp_thin_linear_timeouts;
146 u8 sysctl_tcp_slow_start_after_idle;
147 u8 sysctl_tcp_retrans_collapse;
148 u8 sysctl_tcp_stdurg;
149 u8 sysctl_tcp_rfc1337;
150 u8 sysctl_tcp_abort_on_overflow;
151 u8 sysctl_tcp_fack; /* obsolete */
152 int sysctl_tcp_max_reordering;
153 int sysctl_tcp_adv_win_scale;
155 u8 sysctl_tcp_app_win;
157 u8 sysctl_tcp_nometrics_save;
158 u8 sysctl_tcp_no_ssthresh_metrics_save;
159 u8 sysctl_tcp_moderate_rcvbuf;
160 u8 sysctl_tcp_tso_win_divisor;
161 u8 sysctl_tcp_workaround_signed_windows;
162 int sysctl_tcp_limit_output_bytes;
163 int sysctl_tcp_challenge_ack_limit;
164 int sysctl_tcp_min_rtt_wlen;
165 u8 sysctl_tcp_min_tso_segs;
166 u8 sysctl_tcp_tso_rtt_log;
167 u8 sysctl_tcp_autocorking;
168 u8 sysctl_tcp_reflect_tos;
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 unsigned long sysctl_tcp_comp_sack_delay_ns;
175 unsigned long sysctl_tcp_comp_sack_slack_ns;
176 int sysctl_max_syn_backlog;
177 int sysctl_tcp_fastopen;
178 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
179 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
180 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
181 atomic_t tfo_active_disable_times;
182 unsigned long tfo_active_disable_stamp;
183 u32 tcp_challenge_timestamp;
184 u32 tcp_challenge_count;
186 int sysctl_udp_wmem_min;
187 int sysctl_udp_rmem_min;
189 u8 sysctl_fib_notify_on_flag_change;
191 #ifdef CONFIG_NET_L3_MASTER_DEV
192 u8 sysctl_udp_l3mdev_accept;
195 u8 sysctl_igmp_llm_reports;
196 int sysctl_igmp_max_memberships;
197 int sysctl_igmp_max_msf;
200 struct ping_group_range ping_group_range;
202 atomic_t dev_addr_genid;
205 unsigned long *sysctl_local_reserved_ports;
206 int sysctl_ip_prot_sock;
209 #ifdef CONFIG_IP_MROUTE
210 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
211 struct mr_table *mrt;
213 struct list_head mr_tables;
214 struct fib_rules_ops *mr_rules_ops;
217 #ifdef CONFIG_IP_ROUTE_MULTIPATH
218 u32 sysctl_fib_multipath_hash_fields;
219 u8 sysctl_fib_multipath_use_neigh;
220 u8 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;