From patchwork Thu Aug 29 11:19:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Parav Pandit X-Patchwork-Id: 11121057 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E25C14F7 for ; Thu, 29 Aug 2019 11:20:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 18EC623405 for ; Thu, 29 Aug 2019 11:20:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727435AbfH2LUM (ORCPT ); Thu, 29 Aug 2019 07:20:12 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:43766 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728171AbfH2LTT (ORCPT ); Thu, 29 Aug 2019 07:19:19 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from parav@mellanox.com) with ESMTPS (AES256-SHA encrypted); 29 Aug 2019 14:19:17 +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 x7TBJ8v4020002; Thu, 29 Aug 2019 14:19:15 +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 v2 3/6] mdev: Expose mdev alias in sysfs tree Date: Thu, 29 Aug 2019 06:19:01 -0500 Message-Id: <20190829111904.16042-4-parav@mellanox.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190829111904.16042-1-parav@mellanox.com> References: <20190826204119.54386-1-parav@mellanox.com> <20190829111904.16042-1-parav@mellanox.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Expose the optional alias for an mdev device as a sysfs attribute. This way, userspace tools such as udev may make use of the alias, for example to create a netdevice name for the mdev. Signed-off-by: Parav Pandit --- Changelog: v0->v1: - Addressed comments from Cornelia Huck - Updated commit description --- 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, };