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 fqdir *fqdir; 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 #ifdef CONFIG_NET_L3_MASTER_DEV 108 int sysctl_raw_l3mdev_accept; 109 #endif 110 int sysctl_tcp_early_demux; 111 int sysctl_udp_early_demux; 112 113 int sysctl_fwmark_reflect; 114 int sysctl_tcp_fwmark_accept; 115 #ifdef CONFIG_NET_L3_MASTER_DEV 116 int sysctl_tcp_l3mdev_accept; 117 #endif 118 int sysctl_tcp_mtu_probing; 119 int sysctl_tcp_base_mss; 120 int sysctl_tcp_min_snd_mss; 121 int sysctl_tcp_probe_threshold; 122 u32 sysctl_tcp_probe_interval; 123 124 int sysctl_tcp_keepalive_time; 125 int sysctl_tcp_keepalive_probes; 126 int sysctl_tcp_keepalive_intvl; 127 128 int sysctl_tcp_syn_retries; 129 int sysctl_tcp_synack_retries; 130 int sysctl_tcp_syncookies; 131 int sysctl_tcp_reordering; 132 int sysctl_tcp_retries1; 133 int sysctl_tcp_retries2; 134 int sysctl_tcp_orphan_retries; 135 int sysctl_tcp_fin_timeout; 136 unsigned int sysctl_tcp_notsent_lowat; 137 int sysctl_tcp_tw_reuse; 138 int sysctl_tcp_sack; 139 int sysctl_tcp_window_scaling; 140 int sysctl_tcp_timestamps; 141 int sysctl_tcp_early_retrans; 142 int sysctl_tcp_recovery; 143 int sysctl_tcp_thin_linear_timeouts; 144 int sysctl_tcp_slow_start_after_idle; 145 int sysctl_tcp_retrans_collapse; 146 int sysctl_tcp_stdurg; 147 int sysctl_tcp_rfc1337; 148 int sysctl_tcp_abort_on_overflow; 149 int sysctl_tcp_fack; 150 int sysctl_tcp_max_reordering; 151 int sysctl_tcp_dsack; 152 int sysctl_tcp_app_win; 153 int sysctl_tcp_adv_win_scale; 154 int sysctl_tcp_frto; 155 int sysctl_tcp_nometrics_save; 156 int sysctl_tcp_moderate_rcvbuf; 157 int sysctl_tcp_tso_win_divisor; 158 int sysctl_tcp_workaround_signed_windows; 159 int sysctl_tcp_limit_output_bytes; 160 int sysctl_tcp_challenge_ack_limit; 161 int sysctl_tcp_min_tso_segs; 162 int sysctl_tcp_min_rtt_wlen; 163 int sysctl_tcp_autocorking; 164 int sysctl_tcp_invalid_ratelimit; 165 int sysctl_tcp_pacing_ss_ratio; 166 int sysctl_tcp_pacing_ca_ratio; 167 int sysctl_tcp_wmem[3]; 168 int sysctl_tcp_rmem[3]; 169 int sysctl_tcp_comp_sack_nr; 170 unsigned long sysctl_tcp_comp_sack_delay_ns; 171 struct inet_timewait_death_row tcp_death_row; 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 #ifdef CONFIG_NET_L3_MASTER_DEV 185 int sysctl_udp_l3mdev_accept; 186 #endif 187 188 int sysctl_igmp_max_memberships; 189 int sysctl_igmp_max_msf; 190 int sysctl_igmp_llm_reports; 191 int sysctl_igmp_qrv; 192 193 struct ping_group_range ping_group_range; 194 195 atomic_t dev_addr_genid; 196 197 #ifdef CONFIG_SYSCTL 198 unsigned long *sysctl_local_reserved_ports; 199 int sysctl_ip_prot_sock; 200 #endif 201 202 #ifdef CONFIG_IP_MROUTE 203 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 204 struct mr_table *mrt; 205 #else 206 struct list_head mr_tables; 207 struct fib_rules_ops *mr_rules_ops; 208 #endif 209 #endif 210 #ifdef CONFIG_IP_ROUTE_MULTIPATH 211 int sysctl_fib_multipath_use_neigh; 212 int sysctl_fib_multipath_hash_policy; 213 #endif 214 215 struct fib_notifier_ops *notifier_ops; 216 unsigned int fib_seq; /* protected by rtnl_mutex */ 217 218 struct fib_notifier_ops *ipmr_notifier_ops; 219 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 220 221 atomic_t rt_genid; 222 siphash_key_t ip_id_key; 223 }; 224 #endif 225