From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1B87AA046B for ; Wed, 24 Jul 2019 17:35:06 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 361901C21D; Wed, 24 Jul 2019 17:34:55 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 629CF1C21D for ; Wed, 24 Jul 2019 17:34:50 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Jul 2019 08:34:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,303,1559545200"; d="scan'208";a="163880276" Received: from silpixa00399498.ir.intel.com (HELO silpixa00399498.ger.corp.intel.com) ([10.237.223.125]) by orsmga008.jf.intel.com with ESMTP; 24 Jul 2019 08:34:48 -0700 From: Anatoly Burakov To: dev@dpdk.org Cc: john.mcnamara@intel.com, thomas@monjalon.net Date: Wed, 24 Jul 2019 16:34:44 +0100 Message-Id: <1862ad94e15a61121aea75a2933dc8a44bb12623.1563982007.git.anatoly.burakov@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [PATCH 2/2] usertools/devbind: check if module is loaded before binding X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Currently, if an attempt is made to bind a device to a driver that is not loaded, a confusing and misleading error message appears. Fix it so that, before binding to the driver, we actually check if it is loaded in the kernel first. Signed-off-by: Anatoly Burakov --- usertools/dpdk-devbind.py | 48 ++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 21 deletions(-) diff --git a/usertools/dpdk-devbind.py b/usertools/dpdk-devbind.py index f7c4c6434..53112c999 100755 --- a/usertools/dpdk-devbind.py +++ b/usertools/dpdk-devbind.py @@ -146,6 +146,25 @@ def check_output(args, stderr=None): return subprocess.Popen(args, stdout=subprocess.PIPE, stderr=stderr).communicate()[0] +# check if a specific kernel module is loaded +def module_is_loaded(module): + # Get list of sysfs modules (both built-in and dynamically loaded) + sysfs_path = '/sys/module/' + + # Get the list of directories in sysfs_path + sysfs_mods = [os.path.join(sysfs_path, o) for o + in os.listdir(sysfs_path) + if os.path.isdir(os.path.join(sysfs_path, o))] + + # get module names + sysfs_mods = [os.path.basename(a) for a in sysfs_mods] + + # special case for vfio_pci (module is named vfio-pci, + # but its .ko is named vfio_pci) + sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods] + + return module in sysfs_mods + def check_modules(): '''Checks that igb_uio is loaded''' @@ -155,27 +174,9 @@ def check_modules(): mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers] # first check if module is loaded - try: - # Get list of sysfs modules (both built-in and dynamically loaded) - sysfs_path = '/sys/module/' - - # Get the list of directories in sysfs_path - sysfs_mods = [os.path.join(sysfs_path, o) for o - in os.listdir(sysfs_path) - if os.path.isdir(os.path.join(sysfs_path, o))] - - # Extract the last element of '/sys/module/abc' in the array - sysfs_mods = [a.split('/')[-1] for a in sysfs_mods] - - # special case for vfio_pci (module is named vfio-pci, - # but its .ko is named vfio_pci) - sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods] - - for mod in mods: - if mod["Name"] in sysfs_mods: - mod["Found"] = True - except: - pass + for mod in mods: + if module_is_loaded(mod["Name"]): + mod["Found"] = True # check if we have at least one loaded module if True not in [mod["Found"] for mod in mods] and b_flag is not None: @@ -521,6 +522,11 @@ def bind_all(dev_list, driver, force=False): # driver generated error - it's not a valid device ID, so all is well pass + # check if we're attempting to bind to a driver that isn't loaded + if not module_is_loaded(driver): + print("ERROR: Driver '%s' is not loaded." % driver) + sys.exit(1) + try: dev_list = map(dev_id_from_dev_name, dev_list) except ValueError as ex: -- 2.17.1