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 ctl_table_header; 15 struct ipv4_devconf; 16 struct fib_rules_ops; 17 struct hlist_head; 18 struct fib_table; 19 struct sock; 20 struct local_ports { 21 seqlock_t lock; 22 int range[2]; 23 bool warned; 24 }; 25 26 struct ping_group_range { 27 seqlock_t lock; 28 kgid_t range[2]; 29 }; 30 31 struct inet_hashinfo; 32 33 struct 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 40 struct tcp_fastopen_context; 41 42 struct 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 fqdir *fqdir; 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 u8 sysctl_icmp_echo_ignore_all; 87 u8 sysctl_icmp_echo_enable_probe; 88 u8 sysctl_icmp_echo_ignore_broadcasts; 89 u8 sysctl_icmp_ignore_bogus_error_responses; 90 u8 sysctl_icmp_errors_use_inbound_ifaddr; 91 int sysctl_icmp_ratelimit; 92 int sysctl_icmp_ratemask; 93 94 struct local_ports ip_local_ports; 95 96 u8 sysctl_tcp_ecn; 97 u8 sysctl_tcp_ecn_fallback; 98 99 u8 sysctl_ip_default_ttl; 100 u8 sysctl_ip_no_pmtu_disc; 101 u8 sysctl_ip_fwd_use_pmtu; 102 u8 sysctl_ip_fwd_update_priority; 103 u8 sysctl_ip_nonlocal_bind; 104 u8 sysctl_ip_autobind_reuse; 105 /* Shall we try to damage output packets if routing dev changes? */ 106 u8 sysctl_ip_dynaddr; 107 u8 sysctl_ip_early_demux; 108 #ifdef CONFIG_NET_L3_MASTER_DEV 109 u8 sysctl_raw_l3mdev_accept; 110 #endif 111 u8 sysctl_tcp_early_demux; 112 u8 sysctl_udp_early_demux; 113 114 u8 sysctl_nexthop_compat_mode; 115 116 u8 sysctl_fwmark_reflect; 117 u8 sysctl_tcp_fwmark_accept; 118 #ifdef CONFIG_NET_L3_MASTER_DEV 119 u8 sysctl_tcp_l3mdev_accept; 120 #endif 121 u8 sysctl_tcp_mtu_probing; 122 int sysctl_tcp_mtu_probe_floor; 123 int sysctl_tcp_base_mss; 124 int sysctl_tcp_min_snd_mss; 125 int sysctl_tcp_probe_threshold; 126 u32 sysctl_tcp_probe_interval; 127 128 int sysctl_tcp_keepalive_time; 129 int sysctl_tcp_keepalive_intvl; 130 u8 sysctl_tcp_keepalive_probes; 131 132 u8 sysctl_tcp_syn_retries; 133 u8 sysctl_tcp_synack_retries; 134 u8 sysctl_tcp_syncookies; 135 int sysctl_tcp_reordering; 136 u8 sysctl_tcp_retries1; 137 u8 sysctl_tcp_retries2; 138 u8 sysctl_tcp_orphan_retries; 139 u8 sysctl_tcp_tw_reuse; 140 int sysctl_tcp_fin_timeout; 141 unsigned int sysctl_tcp_notsent_lowat; 142 u8 sysctl_tcp_sack; 143 u8 sysctl_tcp_window_scaling; 144 u8 sysctl_tcp_timestamps; 145 u8 sysctl_tcp_early_retrans; 146 u8 sysctl_tcp_recovery; 147 u8 sysctl_tcp_thin_linear_timeouts; 148 u8 sysctl_tcp_slow_start_after_idle; 149 u8 sysctl_tcp_retrans_collapse; 150 u8 sysctl_tcp_stdurg; 151 u8 sysctl_tcp_rfc1337; 152 u8 sysctl_tcp_abort_on_overflow; 153 u8 sysctl_tcp_fack; /* obsolete */ 154 int sysctl_tcp_max_reordering; 155 int sysctl_tcp_adv_win_scale; 156 u8 sysctl_tcp_dsack; 157 u8 sysctl_tcp_app_win; 158 u8 sysctl_tcp_frto; 159 u8 sysctl_tcp_nometrics_save; 160 u8 sysctl_tcp_no_ssthresh_metrics_save; 161 u8 sysctl_tcp_moderate_rcvbuf; 162 u8 sysctl_tcp_tso_win_divisor; 163 u8 sysctl_tcp_workaround_signed_windows; 164 int sysctl_tcp_limit_output_bytes; 165 int sysctl_tcp_challenge_ack_limit; 166 int sysctl_tcp_min_rtt_wlen; 167 u8 sysctl_tcp_min_tso_segs; 168 u8 sysctl_tcp_autocorking; 169 u8 sysctl_tcp_reflect_tos; 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; 187 188 int sysctl_udp_wmem_min; 189 int sysctl_udp_rmem_min; 190 191 int sysctl_fib_notify_on_flag_change; 192 193 #ifdef CONFIG_NET_L3_MASTER_DEV 194 int sysctl_udp_l3mdev_accept; 195 #endif 196 197 int sysctl_igmp_max_memberships; 198 int sysctl_igmp_max_msf; 199 int sysctl_igmp_llm_reports; 200 int sysctl_igmp_qrv; 201 202 struct ping_group_range ping_group_range; 203 204 atomic_t dev_addr_genid; 205 206 #ifdef CONFIG_SYSCTL 207 unsigned long *sysctl_local_reserved_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 #endif 234