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/* SPDX-License-Identifier: GPL-2.0 */ /* * ipv4 in net namespaces */ #ifndef __NETNS_IPV4_H__ #define __NETNS_IPV4_H__ #include <linux/uidgid.h> #include <net/inet_frag.h> #include <linux/rcupdate.h> #include <linux/seqlock.h> #include <linux/siphash.h> struct ctl_table_header; struct ipv4_devconf; struct fib_rules_ops; struct hlist_head; struct fib_table; struct sock; struct local_ports { u32 range; /* high << 16 | low */ bool warned; }; struct ping_group_range { seqlock_t lock; kgid_t range[2]; }; struct inet_hashinfo; struct inet_timewait_death_row { refcount_t tw_refcount; /* Padding to avoid false sharing, tw_refcount can be often written */ struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp; int sysctl_max_tw_buckets; }; struct tcp_fastopen_context; #ifdef CONFIG_IP_ROUTE_MULTIPATH struct sysctl_fib_multipath_hash_seed { u32 user_seed; u32 mp_seed; }; #endif struct netns_ipv4 { /* Cacheline organization can be found documented in * Documentation/networking/net_cachelines/netns_ipv4_sysctl.rst. * Please update the document when adding new fields. */ /* TX readonly hotpath cache lines */ __cacheline_group_begin(netns_ipv4_read_tx); u8 sysctl_tcp_early_retrans; u8 sysctl_tcp_tso_win_divisor; u8 sysctl_tcp_tso_rtt_log; u8 sysctl_tcp_autocorking; int sysctl_tcp_min_snd_mss; unsigned int sysctl_tcp_notsent_lowat; int sysctl_tcp_limit_output_bytes; int sysctl_tcp_min_rtt_wlen; int sysctl_tcp_wmem[3]; u8 sysctl_ip_fwd_use_pmtu; __cacheline_group_end(netns_ipv4_read_tx); /* TXRX readonly hotpath cache lines */ __cacheline_group_begin(netns_ipv4_read_txrx); u8 sysctl_tcp_moderate_rcvbuf; __cacheline_group_end(netns_ipv4_read_txrx); /* RX readonly hotpath cache line */ __cacheline_group_begin(netns_ipv4_read_rx); u8 sysctl_ip_early_demux; u8 sysctl_tcp_early_demux; int sysctl_tcp_reordering; int sysctl_tcp_rmem[3]; __cacheline_group_end(netns_ipv4_read_rx); struct inet_timewait_death_row tcp_death_row; struct udp_table *udp_table; #ifdef CONFIG_SYSCTL struct ctl_table_header *forw_hdr; struct ctl_table_header *frags_hdr; struct ctl_table_header *ipv4_hdr; struct ctl_table_header *route_hdr; struct ctl_table_header *xfrm4_hdr; #endif struct ipv4_devconf *devconf_all; struct ipv4_devconf *devconf_dflt; struct ip_ra_chain __rcu *ra_chain; struct mutex ra_mutex; #ifdef CONFIG_IP_MULTIPLE_TABLES struct fib_rules_ops *rules_ops; struct fib_table __rcu *fib_main; struct fib_table __rcu *fib_default; unsigned int fib_rules_require_fldissect; bool fib_has_custom_rules; #endif bool fib_has_custom_local_routes; bool fib_offload_disabled; u8 sysctl_tcp_shrink_window; #ifdef CONFIG_IP_ROUTE_CLASSID atomic_t fib_num_tclassid_users; #endif struct hlist_head *fib_table_hash; struct sock *fibnl; struct sock *mc_autojoin_sk; struct inet_peer_base *peers; struct fqdir *fqdir; u8 sysctl_icmp_echo_ignore_all; u8 sysctl_icmp_echo_enable_probe; u8 sysctl_icmp_echo_ignore_broadcasts; u8 sysctl_icmp_ignore_bogus_error_responses; u8 sysctl_icmp_errors_use_inbound_ifaddr; int sysctl_icmp_ratelimit; int sysctl_icmp_ratemask; int sysctl_icmp_msgs_per_sec; int sysctl_icmp_msgs_burst; atomic_t icmp_global_credit; u32 icmp_global_stamp; u32 ip_rt_min_pmtu; int ip_rt_mtu_expires; int ip_rt_min_advmss; struct local_ports ip_local_ports; u8 sysctl_tcp_ecn; u8 sysctl_tcp_ecn_fallback; u8 sysctl_ip_default_ttl; u8 sysctl_ip_no_pmtu_disc; u8 sysctl_ip_fwd_update_priority; u8 sysctl_ip_nonlocal_bind; u8 sysctl_ip_autobind_reuse; /* Shall we try to damage output packets if routing dev changes? */ u8 sysctl_ip_dynaddr; #ifdef CONFIG_NET_L3_MASTER_DEV u8 sysctl_raw_l3mdev_accept; #endif u8 sysctl_udp_early_demux; u8 sysctl_nexthop_compat_mode; u8 sysctl_fwmark_reflect; u8 sysctl_tcp_fwmark_accept; #ifdef CONFIG_NET_L3_MASTER_DEV u8 sysctl_tcp_l3mdev_accept; #endif u8 sysctl_tcp_mtu_probing; int sysctl_tcp_mtu_probe_floor; int sysctl_tcp_base_mss; int sysctl_tcp_probe_threshold; u32 sysctl_tcp_probe_interval; int sysctl_tcp_keepalive_time; int sysctl_tcp_keepalive_intvl; u8 sysctl_tcp_keepalive_probes; u8 sysctl_tcp_syn_retries; u8 sysctl_tcp_synack_retries; u8 sysctl_tcp_syncookies; u8 sysctl_tcp_migrate_req; u8 sysctl_tcp_comp_sack_nr; u8 sysctl_tcp_backlog_ack_defer; u8 sysctl_tcp_pingpong_thresh; u8 sysctl_tcp_retries1; u8 sysctl_tcp_retries2; u8 sysctl_tcp_orphan_retries; u8 sysctl_tcp_tw_reuse; int sysctl_tcp_fin_timeout; u8 sysctl_tcp_sack; u8 sysctl_tcp_window_scaling; u8 sysctl_tcp_timestamps; int sysctl_tcp_rto_min_us; u8 sysctl_tcp_recovery; u8 sysctl_tcp_thin_linear_timeouts; u8 sysctl_tcp_slow_start_after_idle; u8 sysctl_tcp_retrans_collapse; u8 sysctl_tcp_stdurg; u8 sysctl_tcp_rfc1337; u8 sysctl_tcp_abort_on_overflow; u8 sysctl_tcp_fack; /* obsolete */ int sysctl_tcp_max_reordering; int sysctl_tcp_adv_win_scale; /* obsolete */ u8 sysctl_tcp_dsack; u8 sysctl_tcp_app_win; u8 sysctl_tcp_frto; u8 sysctl_tcp_nometrics_save; u8 sysctl_tcp_no_ssthresh_metrics_save; u8 sysctl_tcp_workaround_signed_windows; int sysctl_tcp_challenge_ack_limit; u8 sysctl_tcp_min_tso_segs; u8 sysctl_tcp_reflect_tos; int sysctl_tcp_invalid_ratelimit; int sysctl_tcp_pacing_ss_ratio; int sysctl_tcp_pacing_ca_ratio; unsigned int sysctl_tcp_child_ehash_entries; unsigned long sysctl_tcp_comp_sack_delay_ns; unsigned long sysctl_tcp_comp_sack_slack_ns; int sysctl_max_syn_backlog; int sysctl_tcp_fastopen; const struct tcp_congestion_ops __rcu *tcp_congestion_control; struct tcp_fastopen_context __rcu *tcp_fastopen_ctx; unsigned int sysctl_tcp_fastopen_blackhole_timeout; atomic_t tfo_active_disable_times; unsigned long tfo_active_disable_stamp; u32 tcp_challenge_timestamp; u32 tcp_challenge_count; u8 sysctl_tcp_plb_enabled; u8 sysctl_tcp_plb_idle_rehash_rounds; u8 sysctl_tcp_plb_rehash_rounds; u8 sysctl_tcp_plb_suspend_rto_sec; int sysctl_tcp_plb_cong_thresh; int sysctl_udp_wmem_min; int sysctl_udp_rmem_min; u8 sysctl_fib_notify_on_flag_change; u8 sysctl_tcp_syn_linear_timeouts; #ifdef CONFIG_NET_L3_MASTER_DEV u8 sysctl_udp_l3mdev_accept; #endif u8 sysctl_igmp_llm_reports; int sysctl_igmp_max_memberships; int sysctl_igmp_max_msf; int sysctl_igmp_qrv; struct ping_group_range ping_group_range; atomic_t dev_addr_genid; unsigned int sysctl_udp_child_hash_entries; #ifdef CONFIG_SYSCTL unsigned long *sysctl_local_reserved_ports; int sysctl_ip_prot_sock; #endif #ifdef CONFIG_IP_MROUTE #ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES struct mr_table *mrt; #else struct list_head mr_tables; struct fib_rules_ops *mr_rules_ops; #endif #endif #ifdef CONFIG_IP_ROUTE_MULTIPATH struct sysctl_fib_multipath_hash_seed sysctl_fib_multipath_hash_seed; u32 sysctl_fib_multipath_hash_fields; u8 sysctl_fib_multipath_use_neigh; u8 sysctl_fib_multipath_hash_policy; #endif struct fib_notifier_ops *notifier_ops; unsigned int fib_seq; /* protected by rtnl_mutex */ struct fib_notifier_ops *ipmr_notifier_ops; unsigned int ipmr_seq; /* protected by rtnl_mutex */ atomic_t rt_genid; siphash_key_t ip_id_key; }; #endif