1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * ipv4 in net namespaces
4 */
5
6#ifndef __NETNS_IPV4_H__
7#define __NETNS_IPV4_H__
8
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>
14
15struct ctl_table_header;
16struct ipv4_devconf;
17struct fib_rules_ops;
18struct hlist_head;
19struct fib_table;
20struct sock;
21struct local_ports {
22 seqlock_t lock;
23 int range[2];
24 bool warned;
25};
26
27struct ping_group_range {
28 seqlock_t lock;
29 kgid_t range[2];
30};
31
32struct inet_hashinfo;
33
34struct inet_timewait_death_row {
35 refcount_t tw_refcount;
36
37 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
38 int sysctl_max_tw_buckets;
39};
40
41struct tcp_fastopen_context;
42
43struct netns_ipv4 {
44 struct inet_timewait_death_row *tcp_death_row;
45
46#ifdef CONFIG_SYSCTL
47 struct ctl_table_header *forw_hdr;
48 struct ctl_table_header *frags_hdr;
49 struct ctl_table_header *ipv4_hdr;
50 struct ctl_table_header *route_hdr;
51 struct ctl_table_header *xfrm4_hdr;
52#endif
53 struct ipv4_devconf *devconf_all;
54 struct ipv4_devconf *devconf_dflt;
55 struct ip_ra_chain __rcu *ra_chain;
56 struct mutex ra_mutex;
57#ifdef CONFIG_IP_MULTIPLE_TABLES
58 struct fib_rules_ops *rules_ops;
59 struct fib_table __rcu *fib_main;
60 struct fib_table __rcu *fib_default;
61 unsigned int fib_rules_require_fldissect;
62 bool fib_has_custom_rules;
63#endif
64 bool fib_has_custom_local_routes;
65 bool fib_offload_disabled;
66#ifdef CONFIG_IP_ROUTE_CLASSID
67 atomic_t fib_num_tclassid_users;
68#endif
69 struct hlist_head *fib_table_hash;
70 struct sock *fibnl;
71
72 struct sock *mc_autojoin_sk;
73
74 struct inet_peer_base *peers;
75 struct fqdir *fqdir;
76
77 u8 sysctl_icmp_echo_ignore_all;
78 u8 sysctl_icmp_echo_enable_probe;
79 u8 sysctl_icmp_echo_ignore_broadcasts;
80 u8 sysctl_icmp_ignore_bogus_error_responses;
81 u8 sysctl_icmp_errors_use_inbound_ifaddr;
82 int sysctl_icmp_ratelimit;
83 int sysctl_icmp_ratemask;
84
85 u32 ip_rt_min_pmtu;
86 int ip_rt_mtu_expires;
87 int ip_rt_min_advmss;
88
89 struct local_ports ip_local_ports;
90
91 u8 sysctl_tcp_ecn;
92 u8 sysctl_tcp_ecn_fallback;
93
94 u8 sysctl_ip_default_ttl;
95 u8 sysctl_ip_no_pmtu_disc;
96 u8 sysctl_ip_fwd_use_pmtu;
97 u8 sysctl_ip_fwd_update_priority;
98 u8 sysctl_ip_nonlocal_bind;
99 u8 sysctl_ip_autobind_reuse;
100 /* Shall we try to damage output packets if routing dev changes? */
101 u8 sysctl_ip_dynaddr;
102 u8 sysctl_ip_early_demux;
103#ifdef CONFIG_NET_L3_MASTER_DEV
104 u8 sysctl_raw_l3mdev_accept;
105#endif
106 u8 sysctl_tcp_early_demux;
107 u8 sysctl_udp_early_demux;
108
109 u8 sysctl_nexthop_compat_mode;
110
111 u8 sysctl_fwmark_reflect;
112 u8 sysctl_tcp_fwmark_accept;
113#ifdef CONFIG_NET_L3_MASTER_DEV
114 u8 sysctl_tcp_l3mdev_accept;
115#endif
116 u8 sysctl_tcp_mtu_probing;
117 int sysctl_tcp_mtu_probe_floor;
118 int sysctl_tcp_base_mss;
119 int sysctl_tcp_min_snd_mss;
120 int sysctl_tcp_probe_threshold;
121 u32 sysctl_tcp_probe_interval;
122
123 int sysctl_tcp_keepalive_time;
124 int sysctl_tcp_keepalive_intvl;
125 u8 sysctl_tcp_keepalive_probes;
126
127 u8 sysctl_tcp_syn_retries;
128 u8 sysctl_tcp_synack_retries;
129 u8 sysctl_tcp_syncookies;
130 u8 sysctl_tcp_migrate_req;
131 u8 sysctl_tcp_comp_sack_nr;
132 int sysctl_tcp_reordering;
133 u8 sysctl_tcp_retries1;
134 u8 sysctl_tcp_retries2;
135 u8 sysctl_tcp_orphan_retries;
136 u8 sysctl_tcp_tw_reuse;
137 int sysctl_tcp_fin_timeout;
138 unsigned int sysctl_tcp_notsent_lowat;
139 u8 sysctl_tcp_sack;
140 u8 sysctl_tcp_window_scaling;
141 u8 sysctl_tcp_timestamps;
142 u8 sysctl_tcp_early_retrans;
143 u8 sysctl_tcp_recovery;
144 u8 sysctl_tcp_thin_linear_timeouts;
145 u8 sysctl_tcp_slow_start_after_idle;
146 u8 sysctl_tcp_retrans_collapse;
147 u8 sysctl_tcp_stdurg;
148 u8 sysctl_tcp_rfc1337;
149 u8 sysctl_tcp_abort_on_overflow;
150 u8 sysctl_tcp_fack; /* obsolete */
151 int sysctl_tcp_max_reordering;
152 int sysctl_tcp_adv_win_scale;
153 u8 sysctl_tcp_dsack;
154 u8 sysctl_tcp_app_win;
155 u8 sysctl_tcp_frto;
156 u8 sysctl_tcp_nometrics_save;
157 u8 sysctl_tcp_no_ssthresh_metrics_save;
158 u8 sysctl_tcp_moderate_rcvbuf;
159 u8 sysctl_tcp_tso_win_divisor;
160 u8 sysctl_tcp_workaround_signed_windows;
161 int sysctl_tcp_limit_output_bytes;
162 int sysctl_tcp_challenge_ack_limit;
163 int sysctl_tcp_min_rtt_wlen;
164 u8 sysctl_tcp_min_tso_segs;
165 u8 sysctl_tcp_tso_rtt_log;
166 u8 sysctl_tcp_autocorking;
167 u8 sysctl_tcp_reflect_tos;
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 unsigned long sysctl_tcp_comp_sack_delay_ns;
174 unsigned long sysctl_tcp_comp_sack_slack_ns;
175 int sysctl_max_syn_backlog;
176 int sysctl_tcp_fastopen;
177 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
178 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
179 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
180 atomic_t tfo_active_disable_times;
181 unsigned long tfo_active_disable_stamp;
182
183 int sysctl_udp_wmem_min;
184 int sysctl_udp_rmem_min;
185
186 u8 sysctl_fib_notify_on_flag_change;
187
188#ifdef CONFIG_NET_L3_MASTER_DEV
189 u8 sysctl_udp_l3mdev_accept;
190#endif
191
192 u8 sysctl_igmp_llm_reports;
193 int sysctl_igmp_max_memberships;
194 int sysctl_igmp_max_msf;
195 int sysctl_igmp_qrv;
196
197 struct ping_group_range ping_group_range;
198
199 atomic_t dev_addr_genid;
200
201#ifdef CONFIG_SYSCTL
202 unsigned long *sysctl_local_reserved_ports;
203 int sysctl_ip_prot_sock;
204#endif
205
206#ifdef CONFIG_IP_MROUTE
207#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
208 struct mr_table *mrt;
209#else
210 struct list_head mr_tables;
211 struct fib_rules_ops *mr_rules_ops;
212#endif
213#endif
214#ifdef CONFIG_IP_ROUTE_MULTIPATH
215 u32 sysctl_fib_multipath_hash_fields;
216 u8 sysctl_fib_multipath_use_neigh;
217 u8 sysctl_fib_multipath_hash_policy;
218#endif
219
220 struct fib_notifier_ops *notifier_ops;
221 unsigned int fib_seq; /* protected by rtnl_mutex */
222
223 struct fib_notifier_ops *ipmr_notifier_ops;
224 unsigned int ipmr_seq; /* protected by rtnl_mutex */
225
226 atomic_t rt_genid;
227 siphash_key_t ip_id_key;
228};
229#endif
230

source code of linux/include/net/netns/ipv4.h