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tcp: Namespace-ify sysctl_tcp_rmem and sysctl_tcp_wmem

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Note that when a new netns is created, it inherits its
sysctl_tcp_rmem and sysctl_tcp_wmem from initial netns.

This change is needed so that we can refine TCP rcvbuf autotuning,
to take RTT into consideration.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2017-11-07 00:29:28 -08:00
committed by David S. Miller
parent a3dcaf17ee
commit 356d1833b6
8 changed files with 47 additions and 43 deletions
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32
net/ipv4/sysctl_net_ipv4.c
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@@ -440,22 +440,6 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
},
{
.procname = "tcp_wmem",
.data = &sysctl_tcp_wmem,
.maxlen = sizeof(sysctl_tcp_wmem),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one,
},
{
.procname = "tcp_rmem",
.data = &sysctl_tcp_rmem,
.maxlen = sizeof(sysctl_tcp_rmem),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one,
},
{
.procname = "tcp_low_latency",
.data = &sysctl_tcp_low_latency,
@@ -1164,6 +1148,22 @@ static struct ctl_table ipv4_net_table[] = {
.extra1 = &zero,
.extra2 = &thousand,
},
{
.procname = "tcp_wmem",
.data = &init_net.ipv4.sysctl_tcp_wmem,
.maxlen = sizeof(init_net.ipv4.sysctl_tcp_wmem),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one,
},
{
.procname = "tcp_rmem",
.data = &init_net.ipv4.sysctl_tcp_rmem,
.maxlen = sizeof(init_net.ipv4.sysctl_tcp_rmem),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &one,
},
{ }
};