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 #include <linux/android_kabi.h> 15 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 u32 range; /* high << 16 | low */ 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 /* Padding to avoid false sharing, tw_refcount can be often written */ 38 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp; 39 int sysctl_max_tw_buckets; 40 }; 41 42 struct tcp_fastopen_context; 43 44 #ifdef CONFIG_IP_ROUTE_MULTIPATH 45 struct sysctl_fib_multipath_hash_seed { 46 u32 user_seed; 47 u32 mp_seed; 48 }; 49 #endif 50 51 struct netns_ipv4 { 52 /* Cacheline organization can be found documented in 53 * Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst. 54 * Please update the document when adding new fields. 55 */ 56 57 /* TX readonly hotpath cache lines */ 58 __cacheline_group_begin(netns_ipv4_read_tx); 59 u8 sysctl_tcp_early_retrans; 60 u8 sysctl_tcp_tso_win_divisor; 61 u8 sysctl_tcp_tso_rtt_log; 62 u8 sysctl_tcp_autocorking; 63 int sysctl_tcp_min_snd_mss; 64 unsigned int sysctl_tcp_notsent_lowat; 65 int sysctl_tcp_limit_output_bytes; 66 int sysctl_tcp_min_rtt_wlen; 67 int sysctl_tcp_wmem[3]; 68 u8 sysctl_ip_fwd_use_pmtu; 69 __cacheline_group_end(netns_ipv4_read_tx); 70 71 /* TXRX readonly hotpath cache lines */ 72 __cacheline_group_begin(netns_ipv4_read_txrx); 73 u8 sysctl_tcp_moderate_rcvbuf; 74 __cacheline_group_end(netns_ipv4_read_txrx); 75 76 /* RX readonly hotpath cache line */ 77 __cacheline_group_begin(netns_ipv4_read_rx); 78 u8 sysctl_ip_early_demux; 79 u8 sysctl_tcp_early_demux; 80 int sysctl_tcp_reordering; 81 int sysctl_tcp_rmem[3]; 82 __cacheline_group_end(netns_ipv4_read_rx); 83 84 struct inet_timewait_death_row tcp_death_row; 85 struct udp_table *udp_table; 86 87 #ifdef CONFIG_SYSCTL 88 struct ctl_table_header *forw_hdr; 89 struct ctl_table_header *frags_hdr; 90 struct ctl_table_header *ipv4_hdr; 91 struct ctl_table_header *route_hdr; 92 struct ctl_table_header *xfrm4_hdr; 93 #endif 94 struct ipv4_devconf *devconf_all; 95 struct ipv4_devconf *devconf_dflt; 96 struct ip_ra_chain __rcu *ra_chain; 97 struct mutex ra_mutex; 98 #ifdef CONFIG_IP_MULTIPLE_TABLES 99 struct fib_rules_ops *rules_ops; 100 struct fib_table __rcu *fib_main; 101 struct fib_table __rcu *fib_default; 102 unsigned int fib_rules_require_fldissect; 103 bool fib_has_custom_rules; 104 #endif 105 bool fib_has_custom_local_routes; 106 bool fib_offload_disabled; 107 u8 sysctl_tcp_shrink_window; 108 #ifdef CONFIG_IP_ROUTE_CLASSID 109 atomic_t fib_num_tclassid_users; 110 #endif 111 struct hlist_head *fib_table_hash; 112 struct sock *fibnl; 113 114 struct sock *mc_autojoin_sk; 115 116 struct inet_peer_base *peers; 117 struct fqdir *fqdir; 118 119 u8 sysctl_icmp_echo_ignore_all; 120 u8 sysctl_icmp_echo_enable_probe; 121 u8 sysctl_icmp_echo_ignore_broadcasts; 122 u8 sysctl_icmp_ignore_bogus_error_responses; 123 u8 sysctl_icmp_errors_use_inbound_ifaddr; 124 int sysctl_icmp_ratelimit; 125 int sysctl_icmp_ratemask; 126 int sysctl_icmp_msgs_per_sec; 127 int sysctl_icmp_msgs_burst; 128 atomic_t icmp_global_credit; 129 u32 icmp_global_stamp; 130 u32 ip_rt_min_pmtu; 131 int ip_rt_mtu_expires; 132 int ip_rt_min_advmss; 133 134 struct local_ports ip_local_ports; 135 136 u8 sysctl_tcp_ecn; 137 u8 sysctl_tcp_ecn_fallback; 138 139 u8 sysctl_ip_default_ttl; 140 u8 sysctl_ip_no_pmtu_disc; 141 u8 sysctl_ip_fwd_update_priority; 142 u8 sysctl_ip_nonlocal_bind; 143 u8 sysctl_ip_autobind_reuse; 144 /* Shall we try to damage output packets if routing dev changes? */ 145 u8 sysctl_ip_dynaddr; 146 #ifdef CONFIG_NET_L3_MASTER_DEV 147 u8 sysctl_raw_l3mdev_accept; 148 #endif 149 u8 sysctl_udp_early_demux; 150 151 u8 sysctl_nexthop_compat_mode; 152 153 u8 sysctl_fwmark_reflect; 154 u8 sysctl_tcp_fwmark_accept; 155 #ifdef CONFIG_NET_L3_MASTER_DEV 156 u8 sysctl_tcp_l3mdev_accept; 157 #endif 158 u8 sysctl_tcp_mtu_probing; 159 int sysctl_tcp_mtu_probe_floor; 160 int sysctl_tcp_base_mss; 161 int sysctl_tcp_probe_threshold; 162 u32 sysctl_tcp_probe_interval; 163 164 int sysctl_tcp_keepalive_time; 165 int sysctl_tcp_keepalive_intvl; 166 u8 sysctl_tcp_keepalive_probes; 167 168 u8 sysctl_tcp_syn_retries; 169 u8 sysctl_tcp_synack_retries; 170 u8 sysctl_tcp_syncookies; 171 u8 sysctl_tcp_migrate_req; 172 u8 sysctl_tcp_comp_sack_nr; 173 u8 sysctl_tcp_backlog_ack_defer; 174 u8 sysctl_tcp_pingpong_thresh; 175 176 u8 sysctl_tcp_retries1; 177 u8 sysctl_tcp_retries2; 178 u8 sysctl_tcp_orphan_retries; 179 u8 sysctl_tcp_tw_reuse; 180 int sysctl_tcp_fin_timeout; 181 u8 sysctl_tcp_sack; 182 u8 sysctl_tcp_window_scaling; 183 u8 sysctl_tcp_timestamps; 184 int sysctl_tcp_rto_min_us; 185 u8 sysctl_tcp_recovery; 186 u8 sysctl_tcp_thin_linear_timeouts; 187 u8 sysctl_tcp_slow_start_after_idle; 188 u8 sysctl_tcp_retrans_collapse; 189 u8 sysctl_tcp_stdurg; 190 u8 sysctl_tcp_rfc1337; 191 u8 sysctl_tcp_abort_on_overflow; 192 u8 sysctl_tcp_fack; /* obsolete */ 193 int sysctl_tcp_max_reordering; 194 int sysctl_tcp_adv_win_scale; /* obsolete */ 195 u8 sysctl_tcp_dsack; 196 u8 sysctl_tcp_app_win; 197 u8 sysctl_tcp_frto; 198 u8 sysctl_tcp_nometrics_save; 199 u8 sysctl_tcp_no_ssthresh_metrics_save; 200 u8 sysctl_tcp_workaround_signed_windows; 201 int sysctl_tcp_challenge_ack_limit; 202 u8 sysctl_tcp_min_tso_segs; 203 u8 sysctl_tcp_reflect_tos; 204 int sysctl_tcp_invalid_ratelimit; 205 int sysctl_tcp_pacing_ss_ratio; 206 int sysctl_tcp_pacing_ca_ratio; 207 unsigned int sysctl_tcp_child_ehash_entries; 208 unsigned long sysctl_tcp_comp_sack_delay_ns; 209 unsigned long sysctl_tcp_comp_sack_slack_ns; 210 int sysctl_max_syn_backlog; 211 int sysctl_tcp_fastopen; 212 const struct tcp_congestion_ops __rcu *tcp_congestion_control; 213 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; 214 unsigned int sysctl_tcp_fastopen_blackhole_timeout; 215 atomic_t tfo_active_disable_times; 216 unsigned long tfo_active_disable_stamp; 217 u32 tcp_challenge_timestamp; 218 u32 tcp_challenge_count; 219 u8 sysctl_tcp_plb_enabled; 220 u8 sysctl_tcp_plb_idle_rehash_rounds; 221 u8 sysctl_tcp_plb_rehash_rounds; 222 u8 sysctl_tcp_plb_suspend_rto_sec; 223 int sysctl_tcp_plb_cong_thresh; 224 225 int sysctl_udp_wmem_min; 226 int sysctl_udp_rmem_min; 227 228 u8 sysctl_fib_notify_on_flag_change; 229 u8 sysctl_tcp_syn_linear_timeouts; 230 231 #ifdef CONFIG_NET_L3_MASTER_DEV 232 u8 sysctl_udp_l3mdev_accept; 233 #endif 234 235 u8 sysctl_igmp_llm_reports; 236 int sysctl_igmp_max_memberships; 237 int sysctl_igmp_max_msf; 238 int sysctl_igmp_qrv; 239 240 struct ping_group_range ping_group_range; 241 242 atomic_t dev_addr_genid; 243 244 unsigned int sysctl_udp_child_hash_entries; 245 246 #ifdef CONFIG_SYSCTL 247 unsigned long *sysctl_local_reserved_ports; 248 int sysctl_ip_prot_sock; 249 #endif 250 251 #ifdef CONFIG_IP_MROUTE 252 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 253 struct mr_table *mrt; 254 #else 255 struct list_head mr_tables; 256 struct fib_rules_ops *mr_rules_ops; 257 #endif 258 #endif 259 #ifdef CONFIG_IP_ROUTE_MULTIPATH 260 struct sysctl_fib_multipath_hash_seed sysctl_fib_multipath_hash_seed; 261 u32 sysctl_fib_multipath_hash_fields; 262 u8 sysctl_fib_multipath_use_neigh; 263 u8 sysctl_fib_multipath_hash_policy; 264 #endif 265 266 struct fib_notifier_ops *notifier_ops; 267 unsigned int fib_seq; /* protected by rtnl_mutex */ 268 269 struct fib_notifier_ops *ipmr_notifier_ops; 270 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 271 272 atomic_t rt_genid; 273 siphash_key_t ip_id_key; 274 275 ANDROID_KABI_RESERVE(1); 276 }; 277 #endif 278