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