Commit d4ce5808 authored by Maciej Żenczykowski's avatar Maciej Żenczykowski Committed by David S. Miller

net-tcp: /proc/sys/net/ipv4/tcp_probe_interval is a u32 not int

(fix documentation and sysctl access to treat it as such)

Tested:
  # zcat /proc/config.gz | egrep ^CONFIG_HZ
  CONFIG_HZ_1000=y
  CONFIG_HZ=1000
  # echo $[(1<<32)/1000 + 1] | tee /proc/sys/net/ipv4/tcp_probe_interval
  4294968
  tee: /proc/sys/net/ipv4/tcp_probe_interval: Invalid argument
  # echo $[(1<<32)/1000] | tee /proc/sys/net/ipv4/tcp_probe_interval
  4294967
  # echo 0 | tee /proc/sys/net/ipv4/tcp_probe_interval
  # echo -1 | tee /proc/sys/net/ipv4/tcp_probe_interval
  -1
  tee: /proc/sys/net/ipv4/tcp_probe_interval: Invalid argument
Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 73f21c65
......@@ -425,7 +425,7 @@ tcp_mtu_probing - INTEGER
1 - Disabled by default, enabled when an ICMP black hole detected
2 - Always enabled, use initial MSS of tcp_base_mss.
tcp_probe_interval - INTEGER
tcp_probe_interval - UNSIGNED INTEGER
Controls how often to start TCP Packetization-Layer Path MTU
Discovery reprobe. The default is reprobing every 10 minutes as
per RFC4821.
......
......@@ -48,6 +48,7 @@ static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
static int ip_ping_group_range_min[] = { 0, 0 };
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
static int comp_sack_nr_max = 255;
static u32 u32_max_div_HZ = UINT_MAX / HZ;
/* obsolete */
static int sysctl_tcp_low_latency __read_mostly;
......@@ -745,9 +746,10 @@ static struct ctl_table ipv4_net_table[] = {
{
.procname = "tcp_probe_interval",
.data = &init_net.ipv4.sysctl_tcp_probe_interval,
.maxlen = sizeof(int),
.maxlen = sizeof(u32),
.mode = 0644,
.proc_handler = proc_dointvec,
.proc_handler = proc_douintvec_minmax,
.extra2 = &u32_max_div_HZ,
},
{
.procname = "igmp_link_local_mcast_reports",
......
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