v4.19.13 snapshot.
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
new file mode 100644
index 0000000..e47503b
--- /dev/null
+++ b/include/net/netns/ipv4.h
@@ -0,0 +1,218 @@
+/* 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>
+
+struct tcpm_hash_bucket;
+struct ctl_table_header;
+struct ipv4_devconf;
+struct fib_rules_ops;
+struct hlist_head;
+struct fib_table;
+struct sock;
+struct local_ports {
+ seqlock_t lock;
+ int range[2];
+ bool warned;
+};
+
+struct ping_group_range {
+ seqlock_t lock;
+ kgid_t range[2];
+};
+
+struct inet_hashinfo;
+
+struct inet_timewait_death_row {
+ atomic_t tw_count;
+
+ struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
+ int sysctl_max_tw_buckets;
+};
+
+struct tcp_fastopen_context;
+
+struct netns_ipv4 {
+#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;
+ bool fib_has_custom_rules;
+ unsigned int fib_rules_require_fldissect;
+ struct fib_table __rcu *fib_main;
+ struct fib_table __rcu *fib_default;
+#endif
+ bool fib_has_custom_local_routes;
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ int fib_num_tclassid_users;
+#endif
+ struct hlist_head *fib_table_hash;
+ bool fib_offload_disabled;
+ struct sock *fibnl;
+
+ struct sock * __percpu *icmp_sk;
+ struct sock *mc_autojoin_sk;
+
+ struct inet_peer_base *peers;
+ struct sock * __percpu *tcp_sk;
+ struct netns_frags frags;
+#ifdef CONFIG_NETFILTER
+ struct xt_table *iptable_filter;
+ struct xt_table *iptable_mangle;
+ struct xt_table *iptable_raw;
+ struct xt_table *arptable_filter;
+#ifdef CONFIG_SECURITY
+ struct xt_table *iptable_security;
+#endif
+ struct xt_table *nat_table;
+#endif
+
+ int sysctl_icmp_echo_ignore_all;
+ int sysctl_icmp_echo_ignore_broadcasts;
+ int sysctl_icmp_ignore_bogus_error_responses;
+ int sysctl_icmp_ratelimit;
+ int sysctl_icmp_ratemask;
+ int sysctl_icmp_errors_use_inbound_ifaddr;
+
+ struct local_ports ip_local_ports;
+
+ int sysctl_tcp_ecn;
+ int sysctl_tcp_ecn_fallback;
+
+ int sysctl_ip_default_ttl;
+ int sysctl_ip_no_pmtu_disc;
+ int sysctl_ip_fwd_use_pmtu;
+ int sysctl_ip_fwd_update_priority;
+ int sysctl_ip_nonlocal_bind;
+ /* Shall we try to damage output packets if routing dev changes? */
+ int sysctl_ip_dynaddr;
+ int sysctl_ip_early_demux;
+ int sysctl_tcp_early_demux;
+ int sysctl_udp_early_demux;
+
+ int sysctl_fwmark_reflect;
+ int sysctl_tcp_fwmark_accept;
+#ifdef CONFIG_NET_L3_MASTER_DEV
+ int sysctl_tcp_l3mdev_accept;
+#endif
+ int sysctl_tcp_mtu_probing;
+ int sysctl_tcp_base_mss;
+ int sysctl_tcp_probe_threshold;
+ u32 sysctl_tcp_probe_interval;
+
+ int sysctl_tcp_keepalive_time;
+ int sysctl_tcp_keepalive_probes;
+ int sysctl_tcp_keepalive_intvl;
+
+ int sysctl_tcp_syn_retries;
+ int sysctl_tcp_synack_retries;
+ int sysctl_tcp_syncookies;
+ int sysctl_tcp_reordering;
+ int sysctl_tcp_retries1;
+ int sysctl_tcp_retries2;
+ int sysctl_tcp_orphan_retries;
+ int sysctl_tcp_fin_timeout;
+ unsigned int sysctl_tcp_notsent_lowat;
+ int sysctl_tcp_tw_reuse;
+ int sysctl_tcp_sack;
+ int sysctl_tcp_window_scaling;
+ int sysctl_tcp_timestamps;
+ int sysctl_tcp_early_retrans;
+ int sysctl_tcp_recovery;
+ int sysctl_tcp_thin_linear_timeouts;
+ int sysctl_tcp_slow_start_after_idle;
+ int sysctl_tcp_retrans_collapse;
+ int sysctl_tcp_stdurg;
+ int sysctl_tcp_rfc1337;
+ int sysctl_tcp_abort_on_overflow;
+ int sysctl_tcp_fack;
+ int sysctl_tcp_max_reordering;
+ int sysctl_tcp_dsack;
+ int sysctl_tcp_app_win;
+ int sysctl_tcp_adv_win_scale;
+ int sysctl_tcp_frto;
+ int sysctl_tcp_nometrics_save;
+ int sysctl_tcp_moderate_rcvbuf;
+ int sysctl_tcp_tso_win_divisor;
+ int sysctl_tcp_workaround_signed_windows;
+ int sysctl_tcp_limit_output_bytes;
+ int sysctl_tcp_challenge_ack_limit;
+ int sysctl_tcp_min_tso_segs;
+ int sysctl_tcp_min_rtt_wlen;
+ int sysctl_tcp_autocorking;
+ int sysctl_tcp_invalid_ratelimit;
+ int sysctl_tcp_pacing_ss_ratio;
+ int sysctl_tcp_pacing_ca_ratio;
+ int sysctl_tcp_wmem[3];
+ int sysctl_tcp_rmem[3];
+ int sysctl_tcp_comp_sack_nr;
+ unsigned long sysctl_tcp_comp_sack_delay_ns;
+ struct inet_timewait_death_row tcp_death_row;
+ 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;
+ spinlock_t tcp_fastopen_ctx_lock;
+ unsigned int sysctl_tcp_fastopen_blackhole_timeout;
+ atomic_t tfo_active_disable_times;
+ unsigned long tfo_active_disable_stamp;
+
+ int sysctl_udp_wmem_min;
+ int sysctl_udp_rmem_min;
+
+#ifdef CONFIG_NET_L3_MASTER_DEV
+ int sysctl_udp_l3mdev_accept;
+#endif
+
+ int sysctl_igmp_max_memberships;
+ int sysctl_igmp_max_msf;
+ int sysctl_igmp_llm_reports;
+ int sysctl_igmp_qrv;
+
+ struct ping_group_range ping_group_range;
+
+ atomic_t dev_addr_genid;
+
+#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
+ int sysctl_fib_multipath_use_neigh;
+ int 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;
+};
+#endif