diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-07-11 11:40:00 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-14 18:41:42 -0700 |
| commit | 6c758062c64dfbd61862801fbde4e0702f4f3a23 (patch) | |
| tree | 3fdca354b4409c91707b845139c2534c6c53d4df | |
| parent | 9ca48d616ed76b284f946667a3cb7961205c8ee3 (diff) | |
tcp: add LINUX_MIB_BEYOND_WINDOW
Add a new SNMP MIB : LINUX_MIB_BEYOND_WINDOW
Incremented when an incoming packet is received beyond the
receiver window.
nstat -az | grep TcpExtBeyondWindow
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250711114006.480026-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | Documentation/networking/net_cachelines/snmp.rst | 1 | ||||
| -rw-r--r-- | include/net/dropreason-core.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/snmp.h | 1 | ||||
| -rw-r--r-- | net/ipv4/proc.c | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
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)) |