linux-kernel - [PATCH v1 5/5] mtty: Optionally support mtty alias

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190827191654.41161-6-parav@mellanox.com>
Date:   Tue, 27 Aug 2019 14:16:54 -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 v1 5/5] mtty: Optionally support mtty alias

Provide a module parameter to set alias length to optionally generate
mdev alias.

Example to request mdev alias.
$ modprobe mtty alias_length=12

Signed-off-by: Parav Pandit <parav@...lanox.com>
---
 samples/vfio-mdev/mtty.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 92e770a06ea2..92208245b057 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -1410,6 +1410,15 @@ static struct attribute_group *mdev_type_groups[] = {
 	NULL,
 };
 
+static unsigned int mtty_alias_length;
+module_param_named(alias_length, mtty_alias_length, uint, 0444);
+MODULE_PARM_DESC(alias_length, "mdev alias length; default=0");
+
+static unsigned int mtty_get_alias_length(void)
+{
+	return mtty_alias_length;
+}
+
 static const struct mdev_parent_ops mdev_fops = {
 	.owner                  = THIS_MODULE,
 	.dev_attr_groups        = mtty_dev_groups,
@@ -1422,6 +1431,7 @@ static const struct mdev_parent_ops mdev_fops = {
 	.read                   = mtty_read,
 	.write                  = mtty_write,
 	.ioctl		        = mtty_ioctl,
+	.get_alias_length	= mtty_get_alias_length
 };
 
 static void mtty_device_release(struct device *dev)
-- 
2.19.2