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
13struct tcpm_hash_bucket;
14struct ctl_table_header;
15struct ipv4_devconf;
16struct fib_rules_ops;
17struct hlist_head;
18struct fib_table;
19struct sock;
20struct local_ports {
21 seqlock_t lock;
22 int range[2];
23 bool warned;
24};
25
26struct ping_group_range {
27 seqlock_t lock;
28 kgid_t range[2];
29};
30
31struct inet_hashinfo;
32
33struct inet_timewait_death_row {
34 atomic_t tw_count;
35
36 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
37 int sysctl_max_tw_buckets;
38};
39
40struct tcp_fastopen_context;
41
42struct netns_ipv4 {
43#ifdef CONFIG_SYSCTL
44 struct ctl_table_header *forw_hdr;
45 struct ctl_table_header *frags_hdr;
46 struct ctl_table_header *ipv4_hdr;
47 struct ctl_table_header *route_hdr;
48 struct ctl_table_header *xfrm4_hdr;
49#endif
50 struct ipv4_devconf *devconf_all;
51 struct ipv4_devconf *devconf_dflt;
52 struct ip_ra_chain __rcu *ra_chain;
53 struct mutex ra_mutex;
54#ifdef CONFIG_IP_MULTIPLE_TABLES
55 struct fib_rules_ops *rules_ops;
56 bool fib_has_custom_rules;
57 unsigned int fib_rules_require_fldissect;
58 struct fib_table __rcu *fib_main;
59 struct fib_table __rcu *fib_default;
60#endif
61 bool fib_has_custom_local_routes;
62#ifdef CONFIG_IP_ROUTE_CLASSID
63 int fib_num_tclassid_users;
64#endif
65 struct hlist_head *fib_table_hash;
66 bool fib_offload_disabled;
67 struct sock *fibnl;
68
69 struct sock * __percpu *icmp_sk;
70 struct sock *mc_autojoin_sk;
71
72 struct inet_peer_base *peers;
73 struct sock * __percpu *tcp_sk;
74 struct netns_frags frags;
75#ifdef CONFIG_NETFILTER
76 struct xt_table *iptable_filter;
77 struct xt_table *iptable_mangle;
78 struct xt_table *iptable_raw;
79 struct xt_table *arptable_filter;
80#ifdef CONFIG_SECURITY
81 struct xt_table *iptable_security;
82#endif
83 struct xt_table *nat_table;
84#endif
85
86 int sysctl_icmp_echo_ignore_all;
87 int sysctl_icmp_echo_ignore_broadcasts;
88 int sysctl_icmp_ignore_bogus_error_responses;
89 int sysctl_icmp_ratelimit;
90 int sysctl_icmp_ratemask;
91 int sysctl_icmp_errors_use_inbound_ifaddr;
92
93 struct local_ports ip_local_ports;
94
95 int sysctl_tcp_ecn;
96 int sysctl_tcp_ecn_fallback;
97
98 int sysctl_ip_default_ttl;
99 int sysctl_ip_no_pmtu_disc;
100 int sysctl_ip_fwd_use_pmtu;
101 int sysctl_ip_fwd_update_priority;
102 int sysctl_ip_nonlocal_bind;
103 /* Shall we try to damage output packets if routing dev changes? */
104 int sysctl_ip_dynaddr;
105 int sysctl_ip_early_demux;
106 int sysctl_tcp_early_demux;
107 int sysctl_udp_early_demux;
108
109 int sysctl_fwmark_reflect;
110 int sysctl_tcp_fwmark_accept;
111#ifdef CONFIG_NET_L3_MASTER_DEV
112 int sysctl_tcp_l3mdev_accept;
113#endif
114 int sysctl_tcp_mtu_probing;
115 int sysctl_tcp_base_mss;
116 int sysctl_tcp_probe_threshold;
117 u32 sysctl_tcp_probe_interval;
118
119 int sysctl_tcp_keepalive_time;
120 int sysctl_tcp_keepalive_probes;
121 int sysctl_tcp_keepalive_intvl;
122
123 int sysctl_tcp_syn_retries;
124 int sysctl_tcp_synack_retries;
125 int sysctl_tcp_syncookies;
126 int sysctl_tcp_reordering;
127 int sysctl_tcp_retries1;
128 int sysctl_tcp_retries2;
129 int sysctl_tcp_orphan_retries;
130 int sysctl_tcp_fin_timeout;
131 unsigned int sysctl_tcp_notsent_lowat;
132 int sysctl_tcp_tw_reuse;
133 int sysctl_tcp_sack;
134 int sysctl_tcp_window_scaling;
135 int sysctl_tcp_timestamps;
136 int sysctl_tcp_early_retrans;
137 int sysctl_tcp_recovery;
138 int sysctl_tcp_thin_linear_timeouts;
139 int sysctl_tcp_slow_start_after_idle;
140 int sysctl_tcp_retrans_collapse;
141 int sysctl_tcp_stdurg;
142 int sysctl_tcp_rfc1337;
143 int sysctl_tcp_abort_on_overflow;
144 int sysctl_tcp_fack;
145 int sysctl_tcp_max_reordering;
146 int sysctl_tcp_dsack;
147 int sysctl_tcp_app_win;
148 int sysctl_tcp_adv_win_scale;
149 int sysctl_tcp_frto;
150 int sysctl_tcp_nometrics_save;
151 int sysctl_tcp_moderate_rcvbuf;
152 int sysctl_tcp_tso_win_divisor;
153 int sysctl_tcp_workaround_signed_windows;
154 int sysctl_tcp_limit_output_bytes;
155 int sysctl_tcp_challenge_ack_limit;
156 int sysctl_tcp_min_tso_segs;
157 int sysctl_tcp_min_rtt_wlen;
158 int sysctl_tcp_autocorking;
159 int sysctl_tcp_invalid_ratelimit;
160 int sysctl_tcp_pacing_ss_ratio;
161 int sysctl_tcp_pacing_ca_ratio;
162 int sysctl_tcp_wmem[3];
163 int sysctl_tcp_rmem[3];
164 int sysctl_tcp_comp_sack_nr;
165 unsigned long sysctl_tcp_comp_sack_delay_ns;
166 struct inet_timewait_death_row tcp_death_row;
167 int sysctl_max_syn_backlog;
168 int sysctl_tcp_fastopen;
169 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
170 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
171 spinlock_t tcp_fastopen_ctx_lock;
172 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
173 atomic_t tfo_active_disable_times;
174 unsigned long tfo_active_disable_stamp;
175
176 int sysctl_udp_wmem_min;
177 int sysctl_udp_rmem_min;
178
179#ifdef CONFIG_NET_L3_MASTER_DEV
180 int sysctl_udp_l3mdev_accept;
181#endif
182
183 int sysctl_igmp_max_memberships;
184 int sysctl_igmp_max_msf;
185 int sysctl_igmp_llm_reports;
186 int sysctl_igmp_qrv;
187
188 struct ping_group_range ping_group_range;
189
190 atomic_t dev_addr_genid;
191
192#ifdef CONFIG_SYSCTL
193 unsigned long *sysctl_local_reserved_ports;
194 int sysctl_ip_prot_sock;
195#endif
196
197#ifdef CONFIG_IP_MROUTE
198#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
199 struct mr_table *mrt;
200#else
201 struct list_head mr_tables;
202 struct fib_rules_ops *mr_rules_ops;
203#endif
204#endif
205#ifdef CONFIG_IP_ROUTE_MULTIPATH
206 int sysctl_fib_multipath_use_neigh;
207 int sysctl_fib_multipath_hash_policy;
208#endif
209
210 struct fib_notifier_ops *notifier_ops;
211 unsigned int fib_seq; /* protected by rtnl_mutex */
212
213 struct fib_notifier_ops *ipmr_notifier_ops;
214 unsigned int ipmr_seq; /* protected by rtnl_mutex */
215
216 atomic_t rt_genid;
217};
218#endif
219