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-rw-r--r--Documentation/networking/net_cachelines/snmp.rst1
-rw-r--r--include/net/dropreason-core.h1
-rw-r--r--include/uapi/linux/snmp.h1
-rw-r--r--net/ipv4/proc.c1
-rw-r--r--net/ipv4/tcp_input.c1
5 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/networking/net_cachelines/snmp.rst b/Documentation/networking/net_cachelines/snmp.rst
index bd44b3eebbef..bce4eb35ec48 100644
--- a/Documentation/networking/net_cachelines/snmp.rst
+++ b/Documentation/networking/net_cachelines/snmp.rst
@@ -36,6 +36,7 @@ unsigned_long LINUX_MIB_TIMEWAITRECYCLED
unsigned_long LINUX_MIB_TIMEWAITKILLED
unsigned_long LINUX_MIB_PAWSACTIVEREJECTED
unsigned_long LINUX_MIB_PAWSESTABREJECTED
+unsigned_long LINUX_MIB_BEYOND_WINDOW
unsigned_long LINUX_MIB_TSECR_REJECTED
unsigned_long LINUX_MIB_PAWS_OLD_ACK
unsigned_long LINUX_MIB_PAWS_TW_REJECTED
diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h
index beb134d55747..229bb1826f2a 100644
--- a/include/net/dropreason-core.h
+++ b/include/net/dropreason-core.h
@@ -309,6 +309,7 @@ enum skb_drop_reason {
/**
* @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE:
* Not acceptable END_SEQ field.
+ * Corresponds to LINUX_MIB_BEYOND_WINDOW.
*/
SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE,
/**
diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
index 1d234d7e1892..49f5640092a0 100644
--- a/include/uapi/linux/snmp.h
+++ b/include/uapi/linux/snmp.h
@@ -186,6 +186,7 @@ enum
LINUX_MIB_TIMEWAITKILLED, /* TimeWaitKilled */
LINUX_MIB_PAWSACTIVEREJECTED, /* PAWSActiveRejected */
LINUX_MIB_PAWSESTABREJECTED, /* PAWSEstabRejected */
+ LINUX_MIB_BEYOND_WINDOW, /* BeyondWindow */
LINUX_MIB_TSECRREJECTED, /* TSEcrRejected */
LINUX_MIB_PAWS_OLD_ACK, /* PAWSOldAck */
LINUX_MIB_PAWS_TW_REJECTED, /* PAWSTimewait */
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index ea2f01584379..65b0d0ab0084 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -189,6 +189,7 @@ static const struct snmp_mib snmp4_net_list[] = {
SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
+ SNMP_MIB_ITEM("BeyondWindow", LINUX_MIB_BEYOND_WINDOW),
SNMP_MIB_ITEM("TSEcrRejected", LINUX_MIB_TSECRREJECTED),
SNMP_MIB_ITEM("PAWSOldAck", LINUX_MIB_PAWS_OLD_ACK),
SNMP_MIB_ITEM("PAWSTimewait", LINUX_MIB_PAWS_TW_REJECTED),
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index f0f9c78654b4..5e2d82c273e2 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5900,6 +5900,7 @@ step1:
if (!th->rst) {
if (th->syn)
goto syn_challenge;
+ NET_INC_STATS(sock_net(sk), LINUX_MIB_BEYOND_WINDOW);
if (!tcp_oow_rate_limited(sock_net(sk), skb,
LINUX_MIB_TCPACKSKIPPEDSEQ,
&tp->last_oow_ack_time))