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 /* 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;
40};
41
42struct tcp_fastopen_context;
43
44struct netns_ipv4 {
45 struct inet_timewait_death_row tcp_death_row;
46 struct udp_table *udp_table;
47
48#ifdef CONFIG_SYSCTL
49 struct ctl_table_header *forw_hdr;
50 struct ctl_table_header *frags_hdr;
51 struct ctl_table_header *ipv4_hdr;
52 struct ctl_table_header *route_hdr;
53 struct ctl_table_header *xfrm4_hdr;
54#endif
55 struct ipv4_devconf *devconf_all;
56 struct ipv4_devconf *devconf_dflt;
57 struct ip_ra_chain __rcu *ra_chain;
58 struct mutex ra_mutex;
59#ifdef CONFIG_IP_MULTIPLE_TABLES
60 struct fib_rules_ops *rules_ops;
61 struct fib_table __rcu *fib_main;
62 struct fib_table __rcu *fib_default;
63 unsigned int fib_rules_require_fldissect;
64 bool fib_has_custom_rules;
65#endif
66 bool fib_has_custom_local_routes;
67 bool fib_offload_disabled;
68 u8 sysctl_tcp_shrink_window;
69#ifdef CONFIG_IP_ROUTE_CLASSID
70 atomic_t fib_num_tclassid_users;
71#endif
72 struct hlist_head *fib_table_hash;
73 struct sock *fibnl;
74
75 struct sock *mc_autojoin_sk;
76
77 struct inet_peer_base *peers;
78 struct fqdir *fqdir;
79
80 u8 sysctl_icmp_echo_ignore_all;
81 u8 sysctl_icmp_echo_enable_probe;
82 u8 sysctl_icmp_echo_ignore_broadcasts;
83 u8 sysctl_icmp_ignore_bogus_error_responses;
84 u8 sysctl_icmp_errors_use_inbound_ifaddr;
85 int sysctl_icmp_ratelimit;
86 int sysctl_icmp_ratemask;
87
88 u32 ip_rt_min_pmtu;
89 int ip_rt_mtu_expires;
90 int ip_rt_min_advmss;
91
92 struct local_ports ip_local_ports;
93
94 u8 sysctl_tcp_ecn;
95 u8 sysctl_tcp_ecn_fallback;
96
97 u8 sysctl_ip_default_ttl;
98 u8 sysctl_ip_no_pmtu_disc;
99 u8 sysctl_ip_fwd_use_pmtu;
100 u8 sysctl_ip_fwd_update_priority;
101 u8 sysctl_ip_nonlocal_bind;
102 u8 sysctl_ip_autobind_reuse;
103 /* Shall we try to damage output packets if routing dev changes? */
104 u8 sysctl_ip_dynaddr;
105 u8 sysctl_ip_early_demux;
106#ifdef CONFIG_NET_L3_MASTER_DEV
107 u8 sysctl_raw_l3mdev_accept;
108#endif
109 u8 sysctl_tcp_early_demux;
110 u8 sysctl_udp_early_demux;
111
112 u8 sysctl_nexthop_compat_mode;
113
114 u8 sysctl_fwmark_reflect;
115 u8 sysctl_tcp_fwmark_accept;
116#ifdef CONFIG_NET_L3_MASTER_DEV
117 u8 sysctl_tcp_l3mdev_accept;
118#endif
119 u8 sysctl_tcp_mtu_probing;
120 int sysctl_tcp_mtu_probe_floor;
121 int sysctl_tcp_base_mss;
122 int sysctl_tcp_min_snd_mss;
123 int sysctl_tcp_probe_threshold;
124 u32 sysctl_tcp_probe_interval;
125
126 int sysctl_tcp_keepalive_time;
127 int sysctl_tcp_keepalive_intvl;
128 u8 sysctl_tcp_keepalive_probes;
129
130 u8 sysctl_tcp_syn_retries;
131 u8 sysctl_tcp_synack_retries;
132 u8 sysctl_tcp_syncookies;
133 u8 sysctl_tcp_migrate_req;
134 u8 sysctl_tcp_comp_sack_nr;
135 u8 sysctl_tcp_backlog_ack_defer;
136 u8 sysctl_tcp_pingpong_thresh;
137
138 int sysctl_tcp_reordering;
139 u8 sysctl_tcp_retries1;
140 u8 sysctl_tcp_retries2;
141 u8 sysctl_tcp_orphan_retries;
142 u8 sysctl_tcp_tw_reuse;
143 int sysctl_tcp_fin_timeout;
144 unsigned int sysctl_tcp_notsent_lowat;
145 u8 sysctl_tcp_sack;
146 u8 sysctl_tcp_window_scaling;
147 u8 sysctl_tcp_timestamps;
148 u8 sysctl_tcp_early_retrans;
149 u8 sysctl_tcp_recovery;
150 u8 sysctl_tcp_thin_linear_timeouts;
151 u8 sysctl_tcp_slow_start_after_idle;
152 u8 sysctl_tcp_retrans_collapse;
153 u8 sysctl_tcp_stdurg;
154 u8 sysctl_tcp_rfc1337;
155 u8 sysctl_tcp_abort_on_overflow;
156 u8 sysctl_tcp_fack; /* obsolete */
157 int sysctl_tcp_max_reordering;
158 int sysctl_tcp_adv_win_scale; /* obsolete */
159 u8 sysctl_tcp_dsack;
160 u8 sysctl_tcp_app_win;
161 u8 sysctl_tcp_frto;
162 u8 sysctl_tcp_nometrics_save;
163 u8 sysctl_tcp_no_ssthresh_metrics_save;
164 u8 sysctl_tcp_moderate_rcvbuf;
165 u8 sysctl_tcp_tso_win_divisor;
166 u8 sysctl_tcp_workaround_signed_windows;
167 int sysctl_tcp_limit_output_bytes;
168 int sysctl_tcp_challenge_ack_limit;
169 int sysctl_tcp_min_rtt_wlen;
170 u8 sysctl_tcp_min_tso_segs;
171 u8 sysctl_tcp_tso_rtt_log;
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 unsigned int sysctl_tcp_child_ehash_entries;
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 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
187 atomic_t tfo_active_disable_times;
188 unsigned long tfo_active_disable_stamp;
189 u32 tcp_challenge_timestamp;
190 u32 tcp_challenge_count;
191 u8 sysctl_tcp_plb_enabled;
192 u8 sysctl_tcp_plb_idle_rehash_rounds;
193 u8 sysctl_tcp_plb_rehash_rounds;
194 u8 sysctl_tcp_plb_suspend_rto_sec;
195 int sysctl_tcp_plb_cong_thresh;
196
197 int sysctl_udp_wmem_min;
198 int sysctl_udp_rmem_min;
199
200 u8 sysctl_fib_notify_on_flag_change;
201 u8 sysctl_tcp_syn_linear_timeouts;
202
203#ifdef CONFIG_NET_L3_MASTER_DEV
204 u8 sysctl_udp_l3mdev_accept;
205#endif
206
207 u8 sysctl_igmp_llm_reports;
208 int sysctl_igmp_max_memberships;
209 int sysctl_igmp_max_msf;
210 int sysctl_igmp_qrv;
211
212 struct ping_group_range ping_group_range;
213
214 atomic_t dev_addr_genid;
215
216 unsigned int sysctl_udp_child_hash_entries;
217
218#ifdef CONFIG_SYSCTL
219 unsigned long *sysctl_local_reserved_ports;
220 int sysctl_ip_prot_sock;
221#endif
222
223#ifdef CONFIG_IP_MROUTE
224#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
225 struct mr_table *mrt;
226#else
227 struct list_head mr_tables;
228 struct fib_rules_ops *mr_rules_ops;
229#endif
230#endif
231#ifdef CONFIG_IP_ROUTE_MULTIPATH
232 u32 sysctl_fib_multipath_hash_fields;
233 u8 sysctl_fib_multipath_use_neigh;
234 u8 sysctl_fib_multipath_hash_policy;
235#endif
236
237 struct fib_notifier_ops *notifier_ops;
238 unsigned int fib_seq; /* protected by rtnl_mutex */
239
240 struct fib_notifier_ops *ipmr_notifier_ops;
241 unsigned int ipmr_seq; /* protected by rtnl_mutex */
242
243 atomic_t rt_genid;
244 siphash_key_t ip_id_key;
245};
246#endif
247

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