tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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/siphash.h>
13
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 char tw_pad[L1_CACHE_BYTES - sizeof(atomic_t)];
36
37 struct inet_hashinfo *hashinfo;
38 int sysctl_max_tw_buckets;
39};
40
41struct tcp_fastopen_context;
42
43struct netns_ipv4 {
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;
46
47#ifdef CONFIG_SYSCTL
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;
53#endif
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;
64#endif
65 bool fib_has_custom_local_routes;
66 bool fib_offload_disabled;
67#ifdef CONFIG_IP_ROUTE_CLASSID
68 int fib_num_tclassid_users;
69#endif
70 struct hlist_head *fib_table_hash;
71 struct sock *fibnl;
72
73 struct sock * __percpu *icmp_sk;
74 struct sock *mc_autojoin_sk;
75
76 struct inet_peer_base *peers;
77 struct sock * __percpu *tcp_sk;
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 struct local_ports ip_local_ports;
89
90 u8 sysctl_tcp_ecn;
91 u8 sysctl_tcp_ecn_fallback;
92
93 u8 sysctl_ip_default_ttl;
94 u8 sysctl_ip_no_pmtu_disc;
95 u8 sysctl_ip_fwd_use_pmtu;
96 u8 sysctl_ip_fwd_update_priority;
97 u8 sysctl_ip_nonlocal_bind;
98 u8 sysctl_ip_autobind_reuse;
99 /* Shall we try to damage output packets if routing dev changes? */
100 u8 sysctl_ip_dynaddr;
101 u8 sysctl_ip_early_demux;
102#ifdef CONFIG_NET_L3_MASTER_DEV
103 u8 sysctl_raw_l3mdev_accept;
104#endif
105 u8 sysctl_tcp_early_demux;
106 u8 sysctl_udp_early_demux;
107
108 u8 sysctl_nexthop_compat_mode;
109
110 u8 sysctl_fwmark_reflect;
111 u8 sysctl_tcp_fwmark_accept;
112#ifdef CONFIG_NET_L3_MASTER_DEV
113 u8 sysctl_tcp_l3mdev_accept;
114#endif
115 u8 sysctl_tcp_mtu_probing;
116 int sysctl_tcp_mtu_probe_floor;
117 int sysctl_tcp_base_mss;
118 int sysctl_tcp_min_snd_mss;
119 int sysctl_tcp_probe_threshold;
120 u32 sysctl_tcp_probe_interval;
121
122 int sysctl_tcp_keepalive_time;
123 int sysctl_tcp_keepalive_intvl;
124 u8 sysctl_tcp_keepalive_probes;
125
126 u8 sysctl_tcp_syn_retries;
127 u8 sysctl_tcp_synack_retries;
128 u8 sysctl_tcp_syncookies;
129 int sysctl_tcp_reordering;
130 u8 sysctl_tcp_retries1;
131 u8 sysctl_tcp_retries2;
132 u8 sysctl_tcp_orphan_retries;
133 u8 sysctl_tcp_tw_reuse;
134 int sysctl_tcp_fin_timeout;
135 unsigned int sysctl_tcp_notsent_lowat;
136 u8 sysctl_tcp_sack;
137 u8 sysctl_tcp_window_scaling;
138 u8 sysctl_tcp_timestamps;
139 u8 sysctl_tcp_early_retrans;
140 u8 sysctl_tcp_recovery;
141 u8 sysctl_tcp_thin_linear_timeouts;
142 u8 sysctl_tcp_slow_start_after_idle;
143 u8 sysctl_tcp_retrans_collapse;
144 u8 sysctl_tcp_stdurg;
145 u8 sysctl_tcp_rfc1337;
146 u8 sysctl_tcp_abort_on_overflow;
147 u8 sysctl_tcp_fack; /* obsolete */
148 int sysctl_tcp_max_reordering;
149 int sysctl_tcp_adv_win_scale;
150 u8 sysctl_tcp_dsack;
151 u8 sysctl_tcp_app_win;
152 u8 sysctl_tcp_frto;
153 u8 sysctl_tcp_nometrics_save;
154 u8 sysctl_tcp_no_ssthresh_metrics_save;
155 u8 sysctl_tcp_moderate_rcvbuf;
156 u8 sysctl_tcp_tso_win_divisor;
157 u8 sysctl_tcp_workaround_signed_windows;
158 int sysctl_tcp_limit_output_bytes;
159 int sysctl_tcp_challenge_ack_limit;
160 int sysctl_tcp_min_rtt_wlen;
161 u8 sysctl_tcp_min_tso_segs;
162 u8 sysctl_tcp_autocorking;
163 u8 sysctl_tcp_reflect_tos;
164 u8 sysctl_tcp_comp_sack_nr;
165 int sysctl_tcp_invalid_ratelimit;
166 int sysctl_tcp_pacing_ss_ratio;
167 int sysctl_tcp_pacing_ca_ratio;
168 int sysctl_tcp_wmem[3];
169 int sysctl_tcp_rmem[3];
170 unsigned long sysctl_tcp_comp_sack_delay_ns;
171 unsigned long sysctl_tcp_comp_sack_slack_ns;
172 int sysctl_max_syn_backlog;
173 int sysctl_tcp_fastopen;
174 const struct tcp_congestion_ops __rcu *tcp_congestion_control;
175 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
176 spinlock_t tcp_fastopen_ctx_lock;
177 unsigned int sysctl_tcp_fastopen_blackhole_timeout;
178 atomic_t tfo_active_disable_times;
179 unsigned long tfo_active_disable_stamp;
180
181 int sysctl_udp_wmem_min;
182 int sysctl_udp_rmem_min;
183
184 u8 sysctl_fib_notify_on_flag_change;
185
186#ifdef CONFIG_NET_L3_MASTER_DEV
187 u8 sysctl_udp_l3mdev_accept;
188#endif
189
190 u8 sysctl_igmp_llm_reports;
191 int sysctl_igmp_max_memberships;
192 int sysctl_igmp_max_msf;
193 int sysctl_igmp_qrv;
194
195 struct ping_group_range ping_group_range;
196
197 atomic_t dev_addr_genid;
198
199#ifdef CONFIG_SYSCTL
200 unsigned long *sysctl_local_reserved_ports;
201 int sysctl_ip_prot_sock;
202#endif
203
204#ifdef CONFIG_IP_MROUTE
205#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
206 struct mr_table *mrt;
207#else
208 struct list_head mr_tables;
209 struct fib_rules_ops *mr_rules_ops;
210#endif
211#endif
212#ifdef CONFIG_IP_ROUTE_MULTIPATH
213 u8 sysctl_fib_multipath_use_neigh;
214 u8 sysctl_fib_multipath_hash_policy;
215#endif
216
217 struct fib_notifier_ops *notifier_ops;
218 unsigned int fib_seq; /* protected by rtnl_mutex */
219
220 struct fib_notifier_ops *ipmr_notifier_ops;
221 unsigned int ipmr_seq; /* protected by rtnl_mutex */
222
223 atomic_t rt_genid;
224 siphash_key_t ip_id_key;
225};
226#endif