From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02292C3A59F for ; Mon, 26 Aug 2019 20:41:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D496D2184D for ; Mon, 26 Aug 2019 20:41:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729953AbfHZUll (ORCPT ); Mon, 26 Aug 2019 16:41:41 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:37907 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729691AbfHZUlj (ORCPT ); Mon, 26 Aug 2019 16:41:39 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from parav@mellanox.com) with ESMTPS (AES256-SHA encrypted); 26 Aug 2019 23:41:35 +0300 Received: from sw-mtx-036.mtx.labs.mlnx (sw-mtx-036.mtx.labs.mlnx [10.12.150.149]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x7QKfPDR021168; Mon, 26 Aug 2019 23:41:32 +0300 From: Parav Pandit To: alex.williamson@redhat.com, jiri@mellanox.com, kwankhede@nvidia.com, cohuck@redhat.com, davem@davemloft.net Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Parav Pandit Subject: [PATCH 3/4] mdev: Expose mdev alias in sysfs tree Date: Mon, 26 Aug 2019 15:41:18 -0500 Message-Id: <20190826204119.54386-4-parav@mellanox.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190826204119.54386-1-parav@mellanox.com> References: <20190826204119.54386-1-parav@mellanox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Expose mdev alias as string in a sysfs tree so that such attribute can be used to generate netdevice name by systemd/udev or can be used to match other kernel objects based on the alias of the mdev. Signed-off-by: Parav Pandit --- drivers/vfio/mdev/mdev_sysfs.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c index 43afe0e80b76..59f4e3cc5233 100644 --- a/drivers/vfio/mdev/mdev_sysfs.c +++ b/drivers/vfio/mdev/mdev_sysfs.c @@ -246,7 +246,20 @@ static ssize_t remove_store(struct device *dev, struct device_attribute *attr, static DEVICE_ATTR_WO(remove); +static ssize_t alias_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mdev_device *dev = mdev_from_dev(device); + + if (!dev->alias) + return -EOPNOTSUPP; + + return sprintf(buf, "%s\n", dev->alias); +} +static DEVICE_ATTR_RO(alias); + static const struct attribute *mdev_device_attrs[] = { + &dev_attr_alias.attr, &dev_attr_remove.attr, NULL, }; -- 2.19.2