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 13 struct tcpm_hash_bucket; 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 #ifdef CONFIG_IP_MULTIPLE_TABLES 53 struct fib_rules_ops *rules_ops; 54 bool fib_has_custom_rules; 55 struct fib_table __rcu *fib_main; 56 struct fib_table __rcu *fib_default; 57 #endif 58 bool fib_has_custom_local_routes; 59 #ifdef CONFIG_IP_ROUTE_CLASSID 60 int fib_num_tclassid_users; 61 #endif 62 struct hlist_head *fib_table_hash; 63 bool fib_offload_disabled; 64 struct sock *fibnl; 65 66 struct sock * __percpu *icmp_sk; 67 struct sock *mc_autojoin_sk; 68 69 struct inet_peer_base *peers; 70 struct sock * __percpu *tcp_sk; 71 struct netns_frags frags; 72 #ifdef CONFIG_NETFILTER 73 struct xt_table *iptable_filter; 74 struct xt_table *iptable_mangle; 75 struct xt_table *iptable_raw; 76 struct xt_table *arptable_filter; 77 #ifdef CONFIG_SECURITY 78 struct xt_table *iptable_security; 79 #endif 80 struct xt_table *nat_table; 81 #endif 82 83 int sysctl_icmp_echo_ignore_all; 84 int sysctl_icmp_echo_ignore_broadcasts; 85 int sysctl_icmp_ignore_bogus_error_responses; 86 int sysctl_icmp_ratelimit; 87 int sysctl_icmp_ratemask; 88 int sysctl_icmp_errors_use_inbound_ifaddr; 89 90 struct local_ports ip_local_ports; 91 92 int sysctl_tcp_ecn; 93 int sysctl_tcp_ecn_fallback; 94 95 int sysctl_ip_default_ttl; 96 int sysctl_ip_no_pmtu_disc; 97 int sysctl_ip_fwd_use_pmtu; 98 int sysctl_ip_nonlocal_bind; 99 /* Shall we try to damage output packets if routing dev changes? */ 100 int sysctl_ip_dynaddr; 101 int sysctl_ip_early_demux; 102 int sysctl_tcp_early_demux; 103 int sysctl_udp_early_demux; 104 105 int sysctl_fwmark_reflect; 106 int sysctl_tcp_fwmark_accept; 107 #ifdef CONFIG_NET_L3_MASTER_DEV 108 int sysctl_tcp_l3mdev_accept; 109 #endif 110 int sysctl_tcp_mtu_probing; 111 int sysctl_tcp_base_mss; 112 int sysctl_tcp_probe_threshold; 113 u32 sysctl_tcp_probe_interval; 114 115 int sysctl_tcp_keepalive_time; 116 int sysctl_tcp_keepalive_probes; 117 int sysctl_tcp_keepalive_intvl; 118 119 int sysctl_tcp_syn_retries; 120 int sysctl_tcp_synack_retries; 121 int sysctl_tcp_syncookies; 122 int sysctl_tcp_reordering; 123 int sysctl_tcp_retries1; 124 int sysctl_tcp_retries2; 125 int sysctl_tcp_orphan_retries; 126 int sysctl_tcp_fin_timeout; 127 unsigned int sysctl_tcp_notsent_lowat; 128 int sysctl_tcp_tw_reuse; 129 int sysctl_tcp_sack; 130 int sysctl_tcp_window_scaling; 131 int sysctl_tcp_timestamps; 132 int sysctl_tcp_early_retrans; 133 int sysctl_tcp_recovery; 134 int sysctl_tcp_thin_linear_timeouts; 135 int sysctl_tcp_slow_start_after_idle; 136 int sysctl_tcp_retrans_collapse; 137 int sysctl_tcp_stdurg; 138 int sysctl_tcp_rfc1337; 139 int sysctl_tcp_abort_on_overflow; 140 int sysctl_tcp_fack; 141 int sysctl_tcp_max_reordering; 142 int sysctl_tcp_dsack; 143 int sysctl_tcp_app_win; 144 int sysctl_tcp_adv_win_scale; 145 int sysctl_tcp_frto; 146 int sysctl_tcp_nometrics_save; 147 int sysctl_tcp_moderate_rcvbuf; 148 int sysctl_tcp_tso_win_divisor; 149 int sysctl_tcp_workaround_signed_windows; 150 int sysctl_tcp_limit_output_bytes; 151 int sysctl_tcp_challenge_ack_limit; 152 int sysctl_tcp_min_tso_segs; 153 int sysctl_tcp_min_rtt_wlen; 154 int sysctl_tcp_autocorking; 155 int sysctl_tcp_invalid_ratelimit; 156 int sysctl_tcp_pacing_ss_ratio; 157 int sysctl_tcp_pacing_ca_ratio; 158 struct inet_timewait_death_row tcp_death_row; 159 int sysctl_max_syn_backlog; 160 int sysctl_tcp_fastopen; 161 struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; 162 spinlock_t tcp_fastopen_ctx_lock; 163 unsigned int sysctl_tcp_fastopen_blackhole_timeout; 164 atomic_t tfo_active_disable_times; 165 unsigned long tfo_active_disable_stamp; 166 167 #ifdef CONFIG_NET_L3_MASTER_DEV 168 int sysctl_udp_l3mdev_accept; 169 #endif 170 171 int sysctl_igmp_max_memberships; 172 int sysctl_igmp_max_msf; 173 int sysctl_igmp_llm_reports; 174 int sysctl_igmp_qrv; 175 176 struct ping_group_range ping_group_range; 177 178 atomic_t dev_addr_genid; 179 180 #ifdef CONFIG_SYSCTL 181 unsigned long *sysctl_local_reserved_ports; 182 int sysctl_ip_prot_sock; 183 #endif 184 185 #ifdef CONFIG_IP_MROUTE 186 #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES 187 struct mr_table *mrt; 188 #else 189 struct list_head mr_tables; 190 struct fib_rules_ops *mr_rules_ops; 191 #endif 192 #endif 193 #ifdef CONFIG_IP_ROUTE_MULTIPATH 194 int sysctl_fib_multipath_use_neigh; 195 int sysctl_fib_multipath_hash_policy; 196 #endif 197 198 struct fib_notifier_ops *notifier_ops; 199 unsigned int fib_seq; /* protected by rtnl_mutex */ 200 201 struct fib_notifier_ops *ipmr_notifier_ops; 202 unsigned int ipmr_seq; /* protected by rtnl_mutex */ 203 204 atomic_t rt_genid; 205 }; 206 #endif 207