From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-167.mta0.migadu.com [91.218.175.167]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE62E41B354 for ; Tue, 18 Aug 2026 09:14:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.167 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787044469; cv=none; b=bxptDoVca4CKXuMWaG/E+UMNpW7c70rvWPnfbLp8iMJFKCIeN8MBGPyCTslWtrTurQlTDcx6CEWMAQtfVziuFML2lwy66WGdDOnpDB/HSEiTo6GtNBABBhApByLFlJN2Yy+O1CrS+bmCLut3QwkqhqTz1MJSGWV+WbFCxLeIOGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787044469; c=relaxed/simple; bh=gQ/r96649+HxdrOBIVmVKoPWGJNkZ30qmqEWGiQfM+M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TziLUwxfcZg9f+YU3rXD9HSHWruJ/vhfcBqQHZB62JpWH0fI/qBkvAzzowfabZcWR8UbkxMEvllJaNmTDxLHIeTCZI1rF/rWDKI4rgAJ13Vnbrw8vJzm5hMLZmok9qHIxp86MgewwrngYAJlglc5LGOnhYXKinJ7fdb5FdP1j+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Ao7UnHh2; arc=none smtp.client-ip=91.218.175.167 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Ao7UnHh2" X-Envelope-To: mptcp@lists.linux.dev DKIM-Signature: a=rsa-sha256; bh=gQ/r96649+HxdrOBIVmVKoPWGJNkZ30qmqEWGiQfM+M=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1787044462; v=1; x=1787649262; b=Ao7UnHh2VpNLTMt9GNpYVzgbakSwB7WgF0lE98uvxQmxoA9NFNmEL5s7T2g7KV1vZCLHxHdh ZDJbII8aUaehcwhmyP3kVANGvovuKZD7bdwmHNfaUDEJN2wyr1AsMMGxXY/DgYjfmqUoz++7s70 1vsUzdUPNrhEMiao/AEzFEAI= X-Envelope-To: mptcp@lists.linux.dev Received: from localhost.localdomain (240a:4281:fe00:1ace:7fcd:c486:d361:c952) by smtp.migadu.com with ESMTPS id bfad146502604034; Tue, 18 Aug 2026 09:14:22 +0000 X-Migadu-Flow: FLOW_OUT From: Chenguang Zhao To: mptcp@lists.linux.dev Cc: chenguang.zhao@linux.dev, Chenguang Zhao Subject: [PATCH mptcp-next RFC v4 1/2] mptcp: add MPFailFallback MIB Date: Tue, 18 Aug 2026 17:14:16 +0800 Message-Id: <20260818091417.2200986-2-chenguang.zhao@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260818091417.2200986-1-chenguang.zhao@linux.dev> References: <20260818091417.2200986-1-chenguang.zhao@linux.dev> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chenguang Zhao Add a counter for TCP fallback after accepting MP_FAIL. Signed-off-by: Chenguang Zhao --- net/mptcp/mib.c | 1 + net/mptcp/mib.h | 1 + 2 files changed, 2 insertions(+) diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c index 608cb568897c..648d4dbca764 100644 --- a/net/mptcp/mib.c +++ b/net/mptcp/mib.c @@ -88,6 +88,7 @@ static const struct snmp_mib mptcp_snmp_list[] = { SNMP_MIB_ITEM("MD5SigFallback", MPTCP_MIB_MD5SIGFALLBACK), SNMP_MIB_ITEM("MD5SigReset", MPTCP_MIB_MD5SIGRESET), SNMP_MIB_ITEM("DssFallback", MPTCP_MIB_DSSFALLBACK), + SNMP_MIB_ITEM("MPFailFallback", MPTCP_MIB_MPFAILFALLBACK), SNMP_MIB_ITEM("DssReset", MPTCP_MIB_DSSRESET), SNMP_MIB_ITEM("SimultConnectFallback", MPTCP_MIB_SIMULTCONNFALLBACK), SNMP_MIB_ITEM("FallbackFailed", MPTCP_MIB_FALLBACKFAILED), diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h index 1ebdb55e9534..075e21e20a80 100644 --- a/net/mptcp/mib.h +++ b/net/mptcp/mib.h @@ -91,6 +91,7 @@ enum linux_mptcp_mib_field { MPTCP_MIB_MD5SIGFALLBACK, /* Conflicting TCP option enabled */ MPTCP_MIB_MD5SIGRESET, /* MP_RST: MD5SIG enabled on listener */ MPTCP_MIB_DSSFALLBACK, /* Bad or missing DSS */ + MPTCP_MIB_MPFAILFALLBACK, /* Received MP_FAIL, fallback */ MPTCP_MIB_DSSRESET, /* MP_RST: bad data mapping */ MPTCP_MIB_SIMULTCONNFALLBACK, /* Simultaneous connect */ MPTCP_MIB_FALLBACKFAILED, /* Can't fallback due to msk status */ -- 2.25.1