ipv4: Namespaceify tcp syn retries sysctl knob
Signed-off-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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9d1eb21b59
commit
6fa2516630
6 changed files with 17 additions and 13 deletions
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@ -98,6 +98,8 @@ struct netns_ipv4 {
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int sysctl_tcp_keepalive_probes;
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int sysctl_tcp_keepalive_intvl;
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int sysctl_tcp_syn_retries;
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struct ping_group_range ping_group_range;
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atomic_t dev_addr_genid;
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@ -240,7 +240,6 @@ extern int sysctl_tcp_timestamps;
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extern int sysctl_tcp_window_scaling;
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extern int sysctl_tcp_sack;
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extern int sysctl_tcp_fin_timeout;
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extern int sysctl_tcp_syn_retries;
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extern int sysctl_tcp_synack_retries;
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extern int sysctl_tcp_retries1;
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extern int sysctl_tcp_retries2;
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@ -291,15 +291,6 @@ static struct ctl_table ipv4_table[] = {
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.extra1 = &ip_ttl_min,
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.extra2 = &ip_ttl_max,
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},
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{
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.procname = "tcp_syn_retries",
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.data = &sysctl_tcp_syn_retries,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &tcp_syn_retries_min,
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.extra2 = &tcp_syn_retries_max
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},
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{
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.procname = "tcp_synack_retries",
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.data = &sysctl_tcp_synack_retries,
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@ -960,6 +951,15 @@ static struct ctl_table ipv4_net_table[] = {
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.mode = 0644,
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.proc_handler = proc_dointvec_jiffies,
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},
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{
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.procname = "tcp_syn_retries",
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.data = &init_net.ipv4.sysctl_tcp_syn_retries,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = proc_dointvec_minmax,
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.extra1 = &tcp_syn_retries_min,
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.extra2 = &tcp_syn_retries_max
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},
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{ }
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};
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@ -2731,6 +2731,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
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{
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struct inet_connection_sock *icsk = inet_csk(sk);
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struct tcp_sock *tp = tcp_sk(sk);
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struct net *net = sock_net(sk);
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int val, len;
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if (get_user(len, optlen))
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@ -2765,7 +2766,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
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val = keepalive_probes(tp);
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break;
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case TCP_SYNCNT:
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val = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
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val = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_syn_retries;
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break;
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case TCP_LINGER2:
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val = tp->linger2;
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@ -2388,6 +2388,8 @@ static int __net_init tcp_sk_init(struct net *net)
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net->ipv4.sysctl_tcp_keepalive_probes = TCP_KEEPALIVE_PROBES;
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net->ipv4.sysctl_tcp_keepalive_intvl = TCP_KEEPALIVE_INTVL;
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net->ipv4.sysctl_tcp_syn_retries = TCP_SYN_RETRIES;
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return 0;
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fail:
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tcp_sk_exit(net);
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@ -22,7 +22,6 @@
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#include <linux/gfp.h>
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#include <net/tcp.h>
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int sysctl_tcp_syn_retries __read_mostly = TCP_SYN_RETRIES;
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int sysctl_tcp_synack_retries __read_mostly = TCP_SYNACK_RETRIES;
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int sysctl_tcp_retries1 __read_mostly = TCP_RETR1;
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int sysctl_tcp_retries2 __read_mostly = TCP_RETR2;
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@ -157,6 +156,7 @@ static int tcp_write_timeout(struct sock *sk)
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{
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struct inet_connection_sock *icsk = inet_csk(sk);
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struct tcp_sock *tp = tcp_sk(sk);
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struct net *net = sock_net(sk);
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int retry_until;
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bool do_reset, syn_set = false;
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@ -169,7 +169,7 @@ static int tcp_write_timeout(struct sock *sk)
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NET_INC_STATS_BH(sock_net(sk),
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LINUX_MIB_TCPFASTOPENACTIVEFAIL);
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}
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retry_until = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
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retry_until = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_syn_retries;
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syn_set = true;
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} else {
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if (retransmits_timed_out(sk, sysctl_tcp_retries1, 0, 0)) {
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