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/seqlock.h> 13 #include <linux/siphash.h> 14 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 refcount_t tw_refcount; 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 struct inet_timewait_death_row *tcp_death_row; 45 46 #ifdef CONFIG_SYSCTL 47 struct ctl_table_header *forw_hdr; 48 struct ctl_table_header *frags_hdr; 49 struct ctl_table_header *ipv4_hdr; 50 struct ctl_table_header *route_hdr; 51 struct ctl_table_header *xfrm4_hdr; 52 #endif 53 struct ipv4_devconf *devconf_all; 54 struct ipv4_devconf *devconf_dflt; 55 struct ip_ra_chain __rcu *ra_chain; 56 struct mutex ra_mutex; 57 #ifdef CONFIG_IP_MULTIPLE_TABLES 58 struct fib_rules_ops *rules_ops; 59 struct fib_table __rcu *fib_main; 60 struct fib_table __rcu *fib_default; 61 unsigned int fib_rules_require_fldissect; 62 bool fib_has_custom_rules; 63 #endif 64 bool fib_has_custom_local_routes; 65 bool fib_offload_disabled; 66 #ifdef CONFIG_IP_ROUTE_CLASSID 67 atomic_t fib_num_tclassid_users; 68 #endif 69 struct hlist_head *fib_table_hash; 70 struct sock *fibnl; 71 72 struct sock *mc_autojoin_sk; 73 74 struct inet_peer_base *peers; 75 struct fqdir *fqdir; 76 77 u8 sysctl_icmp_echo_ignore_all; 78 u8 sysctl_icmp_echo_enable_probe; 79 u8 sysctl_icmp_echo_ignore_broadcasts; 80 u8 sysctl_icmp_ignore_bogus_error_responses; 81 u8 sysctl_icmp_errors_use_inbound_ifaddr; 82 int sysctl_icmp_ratelimit; 83 int sysctl_icmp_ratemask; 84 85 u32 ip_rt_min_pmtu; 86 int ip_rt_mtu_expires; 87 int ip_rt_min_advmss; 88 89 struct local_ports ip_local_ports; 90 91 u8 sysctl_tcp_ecn; 92 u8 sysctl_tcp_ecn_fallback; 93 94 u8 sysctl_ip_default_ttl; 95 u8 sysctl_ip_no_pmtu_disc; 96 u8 sysctl_ip_fwd_use_pmtu; 97 u8 sysctl_ip_fwd_update_priority; 98 u8 sysctl_ip_nonlocal_bind; 99 u8 sysctl_ip_autobind_reuse; 100 /* Shall we try to damage output packets if routing dev changes? */ 101 u8 sysctl_ip_dynaddr; 102 u8 sysctl_ip_early_demux; 103 #ifdef CONFIG_NET_L3_MASTER_DEV 104 u8 sysctl_raw_l3mdev_accept; 105 #endif 106 u8 sysctl_tcp_early_demux; 107 u8 sysctl_udp_early_demux; 108 109 u8 sysctl_nexthop_compat_mode; 110 111 u8 sysctl_fwmark_reflect; 112 u8 sysctl_tcp_fwmark_accept; 113 #ifdef CONFIG_NET_L3_MASTER_DEV 114 u8 sysctl_tcp_l3mdev_accept; 115 #endif 116 u8 sysctl_tcp_mtu_probing; 117 int sysctl_tcp_mtu_probe_floor; 118 int sysctl_tcp_base_mss; 119 int sysctl_tcp_min_snd_mss; 120 int sysctl_tcp_probe_threshold; 121 u32 sysctl_tcp_probe_interval; 122 123 int sysctl_tcp_keepalive_time; 124 int sysctl_tcp_keepalive_intvl; 125 u8 sysctl_tcp_keepalive_probes; 126 127 u8 sysctl_tcp_syn_retries; 128 u8 sysctl_tcp_synack_retries; 129 u8 sysctl_tcp_syncookies; 130 u8 sysctl_tcp_migrate_req; 131 u8 sysctl_tcp_comp_sack_nr; 132 int sysctl_tcp_reordering; 133 u8 sysctl_tcp_retries1; 134 u8 sysctl_tcp_retries2; 135 u8 sysctl_tcp_orphan_retries; 136 u8 sysctl_tcp_tw_reuse; 137 int sysctl_tcp_fin_timeout; 138 unsigned int sysctl_tcp_notsent_lowat; 139 u8 sysctl_tcp_sack; 140 u8 sysctl_tcp_window_scaling; 141 u8 sysctl_tcp_timestamps; 142 u8 sysctl_tcp_early_retrans; 143 u8 sysctl_tcp_recovery; 144 u8 sysctl_tcp_thin_linear_timeouts; 145 u8 sysctl_tcp_slow_start_after_idle; 146 u8 sysctl_tcp_retrans_collapse; 147 u8 sysctl_tcp_stdurg; 148 u8 sysctl_tcp_rfc1337; 149 u8 sysctl_tcp_abort_on_overflow; 150 u8 sysctl_tcp_fack; /* obsolete */ 151 int sysctl_tcp_max_reordering; 152 int sysctl_tcp_adv_win_scale; 153 u8 sysctl_tcp_dsack; 154 u8 sysctl_tcp_app_win; 155 u8 sysctl_tcp_frto; 156 u8 sysctl_tcp_nometrics_save; 157 u8 sysctl_tcp_no_ssthresh_metrics_save; 158 u8 sysctl_tcp_moderate_rcvbuf; 159 u8 sysctl_tcp_tso_win_divisor; 160 u8 sysctl_tcp_workaround_signed_windows; 161 int sysctl_tcp_limit_output_bytes; 162 int sysctl_tcp_challenge_ack_limit; 163 int sysctl_tcp_min_rtt_wlen; 164 u8 sysctl_tcp_min_tso_segs; 165 u8 sysctl_tcp_tso_rtt_log; 166 u8 sysctl_tcp_autocorking; 167 u8 sysctl_tcp_reflect_tos; 168 int sysctl_tcp_invalid_ratelimit; 169 int sysctl_tcp_pacing_ss_ratio; 170 int sysctl_tcp_pacing_ca_ratio; 171 int sysctl_tcp_wmem[3]; 172 int sysctl_tcp_rmem[3]; 173 unsigned long sysctl_tcp_comp_sack_delay_ns; 174 unsigned long sysctl_tcp_comp_sack_slack_ns; 175 int sysctl_max_syn_backlog; 176 int sysctl_tcp_fastopen; 177 const struct tcp_congestion_ops __rcu *tcp_congestion_control; 178 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; 179 unsigned int sysctl_tcp_fastopen_blackhole_timeout; 180 atomic_t tfo_active_disable_times; 181 unsigned long tfo_active_disable_stamp; 182 u32 tcp_challenge_timestamp; 183 u32 tcp_challenge_count; 184 185 int sysctl_udp_wmem_min; 186 int sysctl_udp_rmem_min; 187 188 u8 sysctl_fib_notify_on_flag_change; 189 190 #ifdef CONFIG_NET_L3_MASTER_DEV 191 u8 sysctl_udp_l3mdev_accept; 192 #endif 193 194 u8 sysctl_igmp_llm_reports; 195 int sysctl_igmp_max_memberships; 196 int sysctl_igmp_max_msf; 197 int sysctl_igmp_qrv; 198 199 struct ping_group_range ping_group_range; 200 201 atomic_t dev_addr_genid; 202 203 #ifdef CONFIG_SYSCTL 204 unsigned long *sysctl_local_reserved_ports; 205 int sysctl_ip_prot_sock; 206 #endif 207 208 #ifdef CONFIG_IP_MROUTE 209 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 210 struct mr_table *mrt; 211 #else 212 struct list_head mr_tables; 213 struct fib_rules_ops *mr_rules_ops; 214 #endif 215 #endif 216 #ifdef CONFIG_IP_ROUTE_MULTIPATH 217 u32 sysctl_fib_multipath_hash_fields; 218 u8 sysctl_fib_multipath_use_neigh; 219 u8 sysctl_fib_multipath_hash_policy; 220 #endif 221 222 struct fib_notifier_ops *notifier_ops; 223 unsigned int fib_seq; /* protected by rtnl_mutex */ 224 225 struct fib_notifier_ops *ipmr_notifier_ops; 226 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 227 228 atomic_t rt_genid; 229 siphash_key_t ip_id_key; 230 }; 231 #endif 232