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sysctl net: Keep tcp_syn_retries inside the boundary

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Limit the min/max value passed to the
/proc/sys/net/ipv4/tcp_syn_retries.

Signed-off-by: Michal Tesar <mtesar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Tesar 2013-07-19 14:09:01 +02:00 • committed by David S. Miller
parent 087d273caf
commit 651e92716a
1 changed files with 5 additions and 1 deletions
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6
net/ipv4/sysctl_net_ipv4.c
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@ -36,6 +36,8 @@ static int tcp_adv_win_scale_min = -31;
static int tcp_adv_win_scale_max = 31; static int tcp_adv_win_scale_max = 31;
static int ip_ttl_min = 1; static int ip_ttl_min = 1;
static int ip_ttl_max = 255; static int ip_ttl_max = 255;
static int tcp_syn_retries_min = 1;
static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
static int ip_ping_group_range_min[] = { 0, 0 }; static int ip_ping_group_range_min[] = { 0, 0 };
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX }; static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
@ -332,7 +334,9 @@ static struct ctl_table ipv4_table[] = {
.data = &sysctl_tcp_syn_retries, .data = &sysctl_tcp_syn_retries,
.maxlen = sizeof(int), .maxlen = sizeof(int),
.mode = 0644, .mode = 0644,
.proc_handler = proc_dointvec .proc_handler = proc_dointvec_minmax,
.extra1 = &tcp_syn_retries_min,
.extra2 = &tcp_syn_retries_max
}, },
{ {
.procname = "tcp_synack_retries", .procname = "tcp_synack_retries",