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 904AA1F4C90; Tue, 26 Aug 2025 14:03:33 +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=1756217013; cv=none; b=gJD5kdTRboVNgV0VpO3SW46xVxHuez66BgmFEAdLFqDSNF3xzFEyjsAz4w32xzE8xzc7IbelUIPAWNEl9sqFX+Jj1OWxy2aoiaQmd4qJHek0S4ooF7XaHBaHDryUB8GwSTZ68Y4s862asf/FIuiBxgVw1v4sJSXcI63i04OCabo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756217013; c=relaxed/simple; bh=D5vpd7UdrrAjJ48N51rsjIKX1Hx1+vRwebC4EVBcajg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iWwDs1dltQ4ThyP2ioORhe+h/jd3yfIRLI6J10lYMV7ZL7ePsAl2/WS6rggWkN6XbSP+jKTL6OWt0X++bImvIjy66q6Gov4ECFQFrD3Zta+E/CccDJBPalF8BBQBXBK9V4YY/MuAVWE/wWCk/KI80VJdxWYBFHC1iMw2UA3TZb4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Uc9Ekhs4; 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="Uc9Ekhs4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E3BEC4CEF1; Tue, 26 Aug 2025 14:03:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756217013; bh=D5vpd7UdrrAjJ48N51rsjIKX1Hx1+vRwebC4EVBcajg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Uc9Ekhs4i8LgI3um8tvQHVBZ9NGScKLEk6qss5SWvg29QHp6771dxNqZIHOfrbCgW Mbd2VXEJmQ68aKh3pcdQQS2SpFcs9T+6pr4JAKrssdyywLQuksAMISVtYiBKXXFuJb 2SgvA2N4BVJWxk3izmYbq2CMcPvGJxjJDypyZlBU= 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 5.15 626/644] mlxsw: spectrum: Forward packets with an IPv4 link-local source IP Date: Tue, 26 Aug 2025 13:11:57 +0200 Message-ID: <20250826111002.069413254@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@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 5.15-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 35908a8c640a..85353042a790 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -2269,6 +2269,8 @@ 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 9e070ab3ed76..eabaca6c240a 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/trap.h +++ b/drivers/net/ethernet/mellanox/mlxsw/trap.h @@ -93,6 +93,7 @@ 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