| /* 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 |
