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 #include <linux/android_kabi.h> 14 15 struct tcpm_hash_bucket; 16 struct ctl_table_header; 17 struct ipv4_devconf; 18 struct fib_rules_ops; 19 struct hlist_head; 20 struct fib_table; 21 struct sock; 22 struct local_ports { 23 seqlock_t lock; 24 int range[2]; 25 bool warned; 26 }; 27 28 struct ping_group_range { 29 seqlock_t lock; 30 kgid_t range[2]; 31 }; 32 33 struct inet_hashinfo; 34 35 struct inet_timewait_death_row { 36 atomic_t tw_count; 37 38 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp; 39 int sysctl_max_tw_buckets; 40 }; 41 42 struct tcp_fastopen_context; 43 44 struct netns_ipv4 { 45 #ifdef CONFIG_SYSCTL 46 struct ctl_table_header *forw_hdr; 47 struct ctl_table_header *frags_hdr; 48 struct ctl_table_header *ipv4_hdr; 49 struct ctl_table_header *route_hdr; 50 struct ctl_table_header *xfrm4_hdr; 51 #endif 52 struct ipv4_devconf *devconf_all; 53 struct ipv4_devconf *devconf_dflt; 54 struct ip_ra_chain __rcu *ra_chain; 55 struct mutex ra_mutex; 56 #ifdef CONFIG_IP_MULTIPLE_TABLES 57 struct fib_rules_ops *rules_ops; 58 bool fib_has_custom_rules; 59 unsigned int fib_rules_require_fldissect; 60 struct fib_table __rcu *fib_main; 61 struct fib_table __rcu *fib_default; 62 #endif 63 bool fib_has_custom_local_routes; 64 #ifdef CONFIG_IP_ROUTE_CLASSID 65 atomic_t fib_num_tclassid_users; 66 #endif 67 struct hlist_head *fib_table_hash; 68 bool fib_offload_disabled; 69 struct sock *fibnl; 70 71 struct sock * __percpu *icmp_sk; 72 struct sock *mc_autojoin_sk; 73 74 struct inet_peer_base *peers; 75 struct sock * __percpu *tcp_sk; 76 struct fqdir *fqdir; 77 #ifdef CONFIG_NETFILTER 78 struct xt_table *iptable_filter; 79 struct xt_table *iptable_mangle; 80 struct xt_table *iptable_raw; 81 struct xt_table *arptable_filter; 82 #ifdef CONFIG_SECURITY 83 struct xt_table *iptable_security; 84 #endif 85 struct xt_table *nat_table; 86 #endif 87 88 int sysctl_icmp_echo_ignore_all; 89 int sysctl_icmp_echo_ignore_broadcasts; 90 int sysctl_icmp_ignore_bogus_error_responses; 91 int sysctl_icmp_ratelimit; 92 int sysctl_icmp_ratemask; 93 int sysctl_icmp_errors_use_inbound_ifaddr; 94 95 struct local_ports ip_local_ports; 96 97 int sysctl_tcp_ecn; 98 int sysctl_tcp_ecn_fallback; 99 100 int sysctl_ip_default_ttl; 101 int sysctl_ip_no_pmtu_disc; 102 int sysctl_ip_fwd_use_pmtu; 103 int sysctl_ip_fwd_update_priority; 104 int sysctl_ip_nonlocal_bind; 105 int sysctl_ip_autobind_reuse; 106 /* Shall we try to damage output packets if routing dev changes? */ 107 int sysctl_ip_dynaddr; 108 int sysctl_ip_early_demux; 109 #ifdef CONFIG_NET_L3_MASTER_DEV 110 int sysctl_raw_l3mdev_accept; 111 #endif 112 int sysctl_tcp_early_demux; 113 int sysctl_udp_early_demux; 114 115 int sysctl_nexthop_compat_mode; 116 117 int sysctl_fwmark_reflect; 118 int sysctl_tcp_fwmark_accept; 119 #ifdef CONFIG_NET_L3_MASTER_DEV 120 int sysctl_tcp_l3mdev_accept; 121 #endif 122 int sysctl_tcp_mtu_probing; 123 int sysctl_tcp_mtu_probe_floor; 124 int sysctl_tcp_base_mss; 125 int sysctl_tcp_min_snd_mss; 126 int sysctl_tcp_probe_threshold; 127 u32 sysctl_tcp_probe_interval; 128 129 int sysctl_tcp_keepalive_time; 130 int sysctl_tcp_keepalive_probes; 131 int sysctl_tcp_keepalive_intvl; 132 133 int sysctl_tcp_syn_retries; 134 int sysctl_tcp_synack_retries; 135 int sysctl_tcp_syncookies; 136 int sysctl_tcp_reordering; 137 int sysctl_tcp_retries1; 138 int sysctl_tcp_retries2; 139 int sysctl_tcp_orphan_retries; 140 int sysctl_tcp_fin_timeout; 141 unsigned int sysctl_tcp_notsent_lowat; 142 int sysctl_tcp_tw_reuse; 143 int sysctl_tcp_sack; 144 int sysctl_tcp_window_scaling; 145 int sysctl_tcp_timestamps; 146 int sysctl_tcp_early_retrans; 147 int sysctl_tcp_recovery; 148 int sysctl_tcp_thin_linear_timeouts; 149 int sysctl_tcp_slow_start_after_idle; 150 int sysctl_tcp_retrans_collapse; 151 int sysctl_tcp_stdurg; 152 int sysctl_tcp_rfc1337; 153 int sysctl_tcp_abort_on_overflow; 154 int sysctl_tcp_fack; 155 int sysctl_tcp_max_reordering; 156 int sysctl_tcp_dsack; 157 int sysctl_tcp_app_win; 158 int sysctl_tcp_adv_win_scale; 159 int sysctl_tcp_frto; 160 int sysctl_tcp_nometrics_save; 161 int sysctl_tcp_no_ssthresh_metrics_save; 162 int sysctl_tcp_moderate_rcvbuf; 163 int sysctl_tcp_tso_win_divisor; 164 int sysctl_tcp_workaround_signed_windows; 165 int sysctl_tcp_limit_output_bytes; 166 int sysctl_tcp_challenge_ack_limit; 167 int sysctl_tcp_min_tso_segs; 168 int sysctl_tcp_min_rtt_wlen; 169 int sysctl_tcp_autocorking; 170 int sysctl_tcp_invalid_ratelimit; 171 int sysctl_tcp_pacing_ss_ratio; 172 int sysctl_tcp_pacing_ca_ratio; 173 int sysctl_tcp_wmem[3]; 174 int sysctl_tcp_rmem[3]; 175 int sysctl_tcp_comp_sack_nr; 176 unsigned long sysctl_tcp_comp_sack_delay_ns; 177 unsigned long sysctl_tcp_comp_sack_slack_ns; 178 struct inet_timewait_death_row tcp_death_row; 179 int sysctl_max_syn_backlog; 180 int sysctl_tcp_fastopen; 181 const struct tcp_congestion_ops __rcu *tcp_congestion_control; 182 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; 183 spinlock_t tcp_fastopen_ctx_lock; 184 unsigned int sysctl_tcp_fastopen_blackhole_timeout; 185 atomic_t tfo_active_disable_times; 186 unsigned long tfo_active_disable_stamp; 187 int sysctl_tcp_reflect_tos; 188 189 int sysctl_udp_wmem_min; 190 int sysctl_udp_rmem_min; 191 192 #ifdef CONFIG_NET_L3_MASTER_DEV 193 int sysctl_udp_l3mdev_accept; 194 #endif 195 196 int sysctl_igmp_max_memberships; 197 int sysctl_igmp_max_msf; 198 int sysctl_igmp_llm_reports; 199 int sysctl_igmp_qrv; 200 201 struct ping_group_range ping_group_range; 202 203 atomic_t dev_addr_genid; 204 205 #ifdef CONFIG_SYSCTL 206 unsigned long *sysctl_local_reserved_ports; 207 unsigned long *sysctl_local_unbindable_ports; 208 int sysctl_ip_prot_sock; 209 #endif 210 211 #ifdef CONFIG_IP_MROUTE 212 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 213 struct mr_table *mrt; 214 #else 215 struct list_head mr_tables; 216 struct fib_rules_ops *mr_rules_ops; 217 #endif 218 #endif 219 #ifdef CONFIG_IP_ROUTE_MULTIPATH 220 int sysctl_fib_multipath_use_neigh; 221 int sysctl_fib_multipath_hash_policy; 222 #endif 223 224 struct fib_notifier_ops *notifier_ops; 225 unsigned int fib_seq; /* protected by rtnl_mutex */ 226 227 struct fib_notifier_ops *ipmr_notifier_ops; 228 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 229 230 atomic_t rt_genid; 231 siphash_key_t ip_id_key; 232 233 ANDROID_KABI_RESERVE(1); 234 }; 235 #endif 236