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ed2dfd9009
After commit 07f4c90062 ("tcp/dccp: try to not exhaust
ip_local_port_range in connect()") it is advised to have an even number
of ports described in /proc/sys/net/ipv4/ip_local_port_range
This means start/end values should have a different parity.
Let's warn sysadmins of this, so that they can update their settings
if they want to.
Suggested-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
113 lines
2.4 KiB
C
113 lines
2.4 KiB
C
/*
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* ipv4 in net namespaces
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*/
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#ifndef __NETNS_IPV4_H__
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#define __NETNS_IPV4_H__
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#include <linux/uidgid.h>
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#include <net/inet_frag.h>
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#include <linux/rcupdate.h>
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struct tcpm_hash_bucket;
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struct ctl_table_header;
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struct ipv4_devconf;
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struct fib_rules_ops;
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struct hlist_head;
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struct fib_table;
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struct sock;
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struct local_ports {
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seqlock_t lock;
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int range[2];
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bool warned;
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};
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struct ping_group_range {
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seqlock_t lock;
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kgid_t range[2];
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};
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struct netns_ipv4 {
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#ifdef CONFIG_SYSCTL
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struct ctl_table_header *forw_hdr;
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struct ctl_table_header *frags_hdr;
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struct ctl_table_header *ipv4_hdr;
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struct ctl_table_header *route_hdr;
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struct ctl_table_header *xfrm4_hdr;
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#endif
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struct ipv4_devconf *devconf_all;
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struct ipv4_devconf *devconf_dflt;
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#ifdef CONFIG_IP_MULTIPLE_TABLES
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struct fib_rules_ops *rules_ops;
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bool fib_has_custom_rules;
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struct fib_table __rcu *fib_local;
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struct fib_table __rcu *fib_main;
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struct fib_table __rcu *fib_default;
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#endif
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#ifdef CONFIG_IP_ROUTE_CLASSID
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int fib_num_tclassid_users;
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#endif
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struct hlist_head *fib_table_hash;
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bool fib_offload_disabled;
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struct sock *fibnl;
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struct sock * __percpu *icmp_sk;
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struct sock *mc_autojoin_sk;
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struct inet_peer_base *peers;
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struct sock * __percpu *tcp_sk;
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struct netns_frags frags;
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#ifdef CONFIG_NETFILTER
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struct xt_table *iptable_filter;
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struct xt_table *iptable_mangle;
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struct xt_table *iptable_raw;
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struct xt_table *arptable_filter;
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#ifdef CONFIG_SECURITY
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struct xt_table *iptable_security;
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#endif
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struct xt_table *nat_table;
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#endif
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int sysctl_icmp_echo_ignore_all;
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int sysctl_icmp_echo_ignore_broadcasts;
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int sysctl_icmp_ignore_bogus_error_responses;
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int sysctl_icmp_ratelimit;
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int sysctl_icmp_ratemask;
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int sysctl_icmp_errors_use_inbound_ifaddr;
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struct local_ports ip_local_ports;
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int sysctl_tcp_ecn;
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int sysctl_tcp_ecn_fallback;
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int sysctl_ip_no_pmtu_disc;
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int sysctl_ip_fwd_use_pmtu;
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int sysctl_ip_nonlocal_bind;
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int sysctl_fwmark_reflect;
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int sysctl_tcp_fwmark_accept;
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int sysctl_tcp_mtu_probing;
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int sysctl_tcp_base_mss;
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int sysctl_tcp_probe_threshold;
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u32 sysctl_tcp_probe_interval;
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struct ping_group_range ping_group_range;
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atomic_t dev_addr_genid;
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#ifdef CONFIG_SYSCTL
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unsigned long *sysctl_local_reserved_ports;
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#endif
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#ifdef CONFIG_IP_MROUTE
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#ifndef CONFIG_IP_MROUTE_MULTIPLE_TABLES
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struct mr_table *mrt;
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#else
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struct list_head mr_tables;
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struct fib_rules_ops *mr_rules_ops;
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#endif
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#endif
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atomic_t rt_genid;
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};
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#endif
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