netdev - [PATCH v2 4/6] mdev: Introduce an API mdev

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Message-Id: <20190829111904.16042-5-parav@mellanox.com>
Date:   Thu, 29 Aug 2019 06:19:02 -0500
From:   Parav Pandit <parav@...lanox.com>
To:     alex.williamson@...hat.com, jiri@...lanox.com,
        kwankhede@...dia.com, cohuck@...hat.com, davem@...emloft.net
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Parav Pandit <parav@...lanox.com>
Subject: [PATCH v2 4/6] mdev: Introduce an API mdev_alias

Introduce an API mdev_alias() to provide access to optionally generated
alias.

Signed-off-by: Parav Pandit <parav@...lanox.com>
---
 drivers/vfio/mdev/mdev_core.c | 12 ++++++++++++
 include/linux/mdev.h          |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index c9bf2ac362b9..5399ed6f1612 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -517,6 +517,18 @@ struct device *mdev_get_iommu_device(struct device *dev)
 }
 EXPORT_SYMBOL(mdev_get_iommu_device);
 
+/**
+ * mdev_alias: Return alias string of a mdev device
+ * @mdev:	Pointer to the mdev device
+ * mdev_alias() returns alias string of a mdev device if alias is present,
+ * returns NULL otherwise.
+ */
+const char *mdev_alias(struct mdev_device *mdev)
+{
+	return mdev->alias;
+}
+EXPORT_SYMBOL(mdev_alias);
+
 static int __init mdev_init(void)
 {
 	int ret;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index f036fe9854ee..6da82213bc4e 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -148,5 +148,6 @@ void mdev_unregister_driver(struct mdev_driver *drv);
 struct device *mdev_parent_dev(struct mdev_device *mdev);
 struct device *mdev_dev(struct mdev_device *mdev);
 struct mdev_device *mdev_from_dev(struct device *dev);
+const char *mdev_alias(struct mdev_device *mdev);
 
 #endif /* MDEV_H */
-- 
2.19.2