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 15struct ctl_table_header; 16struct ipv4_devconf; 17struct fib_rules_ops; 18struct hlist_head; 19struct fib_table; 20struct sock; 21struct local_ports { 22 seqlock_t lock; 23 int range[2]; 24 bool warned; 25}; 26 27struct ping_group_range { 28 seqlock_t lock; 29 kgid_t range[2]; 30}; 31 32struct inet_hashinfo; 33 34struct 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 42struct tcp_fastopen_context; 43 44struct netns_ipv4 { 45 struct inet_timewait_death_row tcp_death_row; 46 struct udp_table *udp_table; 47 48#ifdef CONFIG_SYSCTL 49 struct ctl_table_header *forw_hdr; 50 struct ctl_table_header *frags_hdr; 51 struct ctl_table_header *ipv4_hdr; 52 struct ctl_table_header *route_hdr; 53 struct ctl_table_header *xfrm4_hdr; 54#endif 55 struct ipv4_devconf *devconf_all; 56 struct ipv4_devconf *devconf_dflt; 57 struct ip_ra_chain __rcu *ra_chain; 58 struct mutex ra_mutex; 59#ifdef CONFIG_IP_MULTIPLE_TABLES 60 struct fib_rules_ops *rules_ops; 61 struct fib_table __rcu *fib_main; 62 struct fib_table __rcu *fib_default; 63 unsigned int fib_rules_require_fldissect; 64 bool fib_has_custom_rules; 65#endif 66 bool fib_has_custom_local_routes; 67 bool fib_offload_disabled; 68 u8 sysctl_tcp_shrink_window; 69#ifdef CONFIG_IP_ROUTE_CLASSID 70 atomic_t fib_num_tclassid_users; 71#endif 72 struct hlist_head *fib_table_hash; 73 struct sock *fibnl; 74 75 struct sock *mc_autojoin_sk; 76 77 struct inet_peer_base *peers; 78 struct fqdir *fqdir; 79 80 u8 sysctl_icmp_echo_ignore_all; 81 u8 sysctl_icmp_echo_enable_probe; 82 u8 sysctl_icmp_echo_ignore_broadcasts; 83 u8 sysctl_icmp_ignore_bogus_error_responses; 84 u8 sysctl_icmp_errors_use_inbound_ifaddr; 85 int sysctl_icmp_ratelimit; 86 int sysctl_icmp_ratemask; 87 88 u32 ip_rt_min_pmtu; 89 int ip_rt_mtu_expires; 90 int ip_rt_min_advmss; 91 92 struct local_ports ip_local_ports; 93 94 u8 sysctl_tcp_ecn; 95 u8 sysctl_tcp_ecn_fallback; 96 97 u8 sysctl_ip_default_ttl; 98 u8 sysctl_ip_no_pmtu_disc; 99 u8 sysctl_ip_fwd_use_pmtu; 100 u8 sysctl_ip_fwd_update_priority; 101 u8 sysctl_ip_nonlocal_bind; 102 u8 sysctl_ip_autobind_reuse; 103 /* Shall we try to damage output packets if routing dev changes? */ 104 u8 sysctl_ip_dynaddr; 105 u8 sysctl_ip_early_demux; 106#ifdef CONFIG_NET_L3_MASTER_DEV 107 u8 sysctl_raw_l3mdev_accept; 108#endif 109 u8 sysctl_tcp_early_demux; 110 u8 sysctl_udp_early_demux; 111 112 u8 sysctl_nexthop_compat_mode; 113 114 u8 sysctl_fwmark_reflect; 115 u8 sysctl_tcp_fwmark_accept; 116#ifdef CONFIG_NET_L3_MASTER_DEV 117 u8 sysctl_tcp_l3mdev_accept; 118#endif 119 u8 sysctl_tcp_mtu_probing; 120 int sysctl_tcp_mtu_probe_floor; 121 int sysctl_tcp_base_mss; 122 int sysctl_tcp_min_snd_mss; 123 int sysctl_tcp_probe_threshold; 124 u32 sysctl_tcp_probe_interval; 125 126 int sysctl_tcp_keepalive_time; 127 int sysctl_tcp_keepalive_intvl; 128 u8 sysctl_tcp_keepalive_probes; 129 130 u8 sysctl_tcp_syn_retries; 131 u8 sysctl_tcp_synack_retries; 132 u8 sysctl_tcp_syncookies; 133 u8 sysctl_tcp_migrate_req; 134 u8 sysctl_tcp_comp_sack_nr; 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; /* obsolete */ 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_tso_rtt_log; 169 u8 sysctl_tcp_autocorking; 170 u8 sysctl_tcp_reflect_tos; 171 int sysctl_tcp_invalid_ratelimit; 172 int sysctl_tcp_pacing_ss_ratio; 173 int sysctl_tcp_pacing_ca_ratio; 174 int sysctl_tcp_wmem[3]; 175 int sysctl_tcp_rmem[3]; 176 unsigned int sysctl_tcp_child_ehash_entries; 177 unsigned long sysctl_tcp_comp_sack_delay_ns; 178 unsigned long sysctl_tcp_comp_sack_slack_ns; 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 unsigned int sysctl_tcp_fastopen_blackhole_timeout; 184 atomic_t tfo_active_disable_times; 185 unsigned long tfo_active_disable_stamp; 186 u32 tcp_challenge_timestamp; 187 u32 tcp_challenge_count; 188 u8 sysctl_tcp_plb_enabled; 189 u8 sysctl_tcp_plb_idle_rehash_rounds; 190 u8 sysctl_tcp_plb_rehash_rounds; 191 u8 sysctl_tcp_plb_suspend_rto_sec; 192 int sysctl_tcp_plb_cong_thresh; 193 194 int sysctl_udp_wmem_min; 195 int sysctl_udp_rmem_min; 196 197 u8 sysctl_fib_notify_on_flag_change; 198 u8 sysctl_tcp_syn_linear_timeouts; 199 200#ifdef CONFIG_NET_L3_MASTER_DEV 201 u8 sysctl_udp_l3mdev_accept; 202#endif 203 204 u8 sysctl_igmp_llm_reports; 205 int sysctl_igmp_max_memberships; 206 int sysctl_igmp_max_msf; 207 int sysctl_igmp_qrv; 208 209 struct ping_group_range ping_group_range; 210 211 atomic_t dev_addr_genid; 212 213 unsigned int sysctl_udp_child_hash_entries; 214 215#ifdef CONFIG_SYSCTL 216 unsigned long *sysctl_local_reserved_ports; 217 int sysctl_ip_prot_sock; 218#endif 219 220#ifdef CONFIG_IP_MROUTE 221#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 222 struct mr_table *mrt; 223#else 224 struct list_head mr_tables; 225 struct fib_rules_ops *mr_rules_ops; 226#endif 227#endif 228#ifdef CONFIG_IP_ROUTE_MULTIPATH 229 u32 sysctl_fib_multipath_hash_fields; 230 u8 sysctl_fib_multipath_use_neigh; 231 u8 sysctl_fib_multipath_hash_policy; 232#endif 233 234 struct fib_notifier_ops *notifier_ops; 235 unsigned int fib_seq; /* protected by rtnl_mutex */ 236 237 struct fib_notifier_ops *ipmr_notifier_ops; 238 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 239 240 atomic_t rt_genid; 241 siphash_key_t ip_id_key; 242}; 243#endif 244