A name property, if set by the host, is exposed in
/sys/class/virtio-console/vconNN/name
that can be used to create symlinks by udev scripts, example:
/dev/vcon/org.libvirt.channel.0 -> /dev/vcon1
Signed-off-by: Amit Shah <amit.shah@xxxxxxxxxx>
---
drivers/char/virtio_console.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 3458340..c3498ec 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -153,6 +153,17 @@ static struct virtio_console_port *get_port_from_vtermno(u32 vtermno)
return NULL;
}
+static struct virtio_console_port *get_port_from_devt(dev_t devt)
+{
+ struct virtio_console_port *port;
+
+ list_for_each_entry(port, &virtconsole.port_head, list) {
+ if (port->dev->devt == devt)
+ return port;
+ }
+ return NULL;
+}
+
static struct virtio_console_port *get_port_from_id(u32 id)
{
struct virtio_console_port *port;
@@ -883,6 +894,30 @@ static void config_intr(struct virtio_device *vdev)
virtcons_apply_config(get_port_from_id(0));
}
+static ssize_t show_port_name(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ struct virtio_console_port *port;
+
+ port = get_port_from_devt(dev->devt);
+ if (!port || !port->name)
+ return 0;
+
+ return sprintf(buffer, "%s\n", port->name);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_port_name, NULL);
+
+static struct attribute *virtcon_sysfs_entries[] = {
+ &dev_attr_name.attr,
+ NULL
+};
+
+static struct attribute_group virtcon_attribute_group = {
+ .name = NULL, /* put in device directory */
+ .attrs = virtcon_sysfs_entries,
+};
+
static int virtconsole_add_port(u32 port_nr)
{
struct virtio_console_port *port;
@@ -917,6 +952,12 @@ static int virtconsole_add_port(u32 port_nr)
pr_err("%s: error creating device, ret = %d\n", __func__, ret);
goto free_cdev;
}
+ ret = sysfs_create_group(&port->dev->kobj, &virtcon_attribute_group);
+ if (ret) {
+ pr_err("%s: error creating sysfs device attributes, ret = %d\n",
+ __func__, ret);
+ goto free_cdev;
+ }
/*
* If we're not using multiport support, this has to be a console port
*/
--
1.6.2.5
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