From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 89D16340D9D; Tue, 26 Aug 2025 11:33:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756208000; cv=none; b=LMxKNbVTznViSYn38yV5LDVzr0CgprKr25AL3Vfc0Hm9O4F52DdtTmZI7lSzlRUy70kl8qgH81lBss2mcN8Iuyc/+qgUiaCpw8fI+qgEenPkuT02oLjVvBP68VJ85RTeYTvCJxqzAejZE/3xm+soRWUpzgwfYtJdttk3ooxb7RI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756208000; c=relaxed/simple; bh=UKwFZdChy1i2LUunsALR+S+WaIQmuC16jzi2BmyZPWU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tUKApBibVcbACxAFRAUBXE+uXMrx3ZyxgljEDbsT5pyuyEdIOnJ9bjePrZPjMauUAoGzyLAgSqVBxez87TWKsmpwUVzXB+UYDKX12oEHGz+CGT6eMizMdpcpbN08AzKBSmizYG35d+H3fmjgsU0aTap11y8ecW4cVTWiKyxGFfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cca4DvCv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="cca4DvCv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4BE4C4CEF1; Tue, 26 Aug 2025 11:33:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756208000; bh=UKwFZdChy1i2LUunsALR+S+WaIQmuC16jzi2BmyZPWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cca4DvCvksbeXz8SeeWyRGA/EOBg0XbGS9qDO/C8vwRGxqssxVrlTFSavA0sBylqp SmLa72KDj3pomEP1ToWL+lL8CrnSnwOlR2aCAqZ5CMByP166qdHCGOWRzJ5xjKws0I qEgiCicYABRfimx/MWtVAJzgJLFwRkePlFNoNb24= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zoey Mertes , Ido Schimmel , Petr Machata , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.16 382/457] mlxsw: spectrum: Forward packets with an IPv4 link-local source IP Date: Tue, 26 Aug 2025 13:11:06 +0200 Message-ID: <20250826110946.737691452@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110937.289866482@linuxfoundation.org> References: <20250826110937.289866482@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ido Schimmel [ Upstream commit f604d3aaf64ff0d90cc875295474d3abf4155629 ] By default, the device does not forward IPv4 packets with a link-local source IP (i.e., 169.254.0.0/16). This behavior does not align with the kernel which does forward them. Fix by instructing the device to forward such packets instead of dropping them. Fixes: ca360db4b825 ("mlxsw: spectrum: Disable DIP_LINK_LOCAL check in hardware pipeline") Reported-by: Zoey Mertes Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Signed-off-by: Petr Machata Link: https://patch.msgid.link/6721e6b2c96feb80269e72ce8d0b426e2f32d99c.1755174341.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 2 ++ drivers/net/ethernet/mellanox/mlxsw/trap.h | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 618957d65663..9a2d64a0a858 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -2375,6 +2375,8 @@ static const struct mlxsw_listener mlxsw_sp_listener[] = { ROUTER_EXP, false), MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_DIP_LINK_LOCAL, FORWARD, ROUTER_EXP, false), + MLXSW_SP_RXL_NO_MARK(DISCARD_ING_ROUTER_SIP_LINK_LOCAL, FORWARD, + ROUTER_EXP, false), /* Multicast Router Traps */ MLXSW_SP_RXL_MARK(ACL1, TRAP_TO_CPU, MULTICAST, false), MLXSW_SP_RXL_L3_MARK(ACL2, TRAP_TO_CPU, MULTICAST, false), diff --git a/drivers/net/ethernet/mellanox/mlxsw/trap.h b/drivers/net/ethernet/mellanox/mlxsw/trap.h index 80ee5c4825dc..9962dc157901 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/trap.h +++ b/drivers/net/ethernet/mellanox/mlxsw/trap.h @@ -94,6 +94,7 @@ enum { MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_SIP_BC = 0x16A, MLXSW_TRAP_ID_DISCARD_ING_ROUTER_IPV4_DIP_LOCAL_NET = 0x16B, MLXSW_TRAP_ID_DISCARD_ING_ROUTER_DIP_LINK_LOCAL = 0x16C, + MLXSW_TRAP_ID_DISCARD_ING_ROUTER_SIP_LINK_LOCAL = 0x16D, MLXSW_TRAP_ID_DISCARD_ROUTER_IRIF_EN = 0x178, MLXSW_TRAP_ID_DISCARD_ROUTER_ERIF_EN = 0x179, MLXSW_TRAP_ID_DISCARD_ROUTER_LPM4 = 0x17B, -- 2.50.1