On Fri, Jun 24, 2011 at 11:51:55PM +0200, Bastian Blank wrote:
> All the Xen backend drivers are assigned to a special bus type
> xen-backend. This allows userspace to load the modules on request.
Is there a specific version of udev that would take advantage of this?
>
> This patch defines xen-backend:* aliases on the modules and exports this
> names through modalias and uevent.
>
> Signed-off-by: Bastian Blank <waldi@xxxxxxxxxx>
> ---
> drivers/block/xen-blkback/blkback.c | 1 +
> drivers/net/xen-netback/netback.c | 1 +
> drivers/xen/xenbus/xenbus_probe.c | 3 ++-
> drivers/xen/xenbus/xenbus_probe_backend.c | 3 +++
> 4 files changed, 7 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/block/xen-blkback/blkback.c
> b/drivers/block/xen-blkback/blkback.c
> index 5cf2993..ed62008 100644
> --- a/drivers/block/xen-blkback/blkback.c
> +++ b/drivers/block/xen-blkback/blkback.c
> @@ -824,3 +824,4 @@ static int __init xen_blkif_init(void)
> module_init(xen_blkif_init);
>
> MODULE_LICENSE("Dual BSD/GPL");
> +MODULE_ALIAS("xen-backend:vbd");
> diff --git a/drivers/net/xen-netback/netback.c
> b/drivers/net/xen-netback/netback.c
> index 0e4851b..fd00f25 100644
> --- a/drivers/net/xen-netback/netback.c
> +++ b/drivers/net/xen-netback/netback.c
> @@ -1743,3 +1743,4 @@ failed_init:
> module_init(netback_init);
>
> MODULE_LICENSE("Dual BSD/GPL");
> +MODULE_ALIAS("xen-backend:vif");
> diff --git a/drivers/xen/xenbus/xenbus_probe.c
> b/drivers/xen/xenbus/xenbus_probe.c
> index 2ed0b04..bd2f90c 100644
> --- a/drivers/xen/xenbus/xenbus_probe.c
> +++ b/drivers/xen/xenbus/xenbus_probe.c
> @@ -393,7 +393,8 @@ static ssize_t devtype_show(struct device *dev,
> static ssize_t modalias_show(struct device *dev,
> struct device_attribute *attr, char *buf)
> {
> - return sprintf(buf, "xen:%s\n", to_xenbus_device(dev)->devicetype);
> + return sprintf(buf, "%s:%s\n", dev->bus->name,
> + to_xenbus_device(dev)->devicetype);
> }
>
> struct device_attribute xenbus_dev_attrs[] = {
> diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c
> b/drivers/xen/xenbus/xenbus_probe_backend.c
> index ec510e5..60adf91 100644
> --- a/drivers/xen/xenbus/xenbus_probe_backend.c
> +++ b/drivers/xen/xenbus/xenbus_probe_backend.c
> @@ -107,6 +107,9 @@ static int xenbus_uevent_backend(struct device *dev,
> if (xdev == NULL)
> return -ENODEV;
>
> + if (add_uevent_var(env, "MODALIAS=xen-backend:%s", xdev->devicetype))
> + return -ENOMEM;
> +
> /* stuff we want to pass to /sbin/hotplug */
> if (add_uevent_var(env, "XENBUS_TYPE=%s", xdev->devicetype))
> return -ENOMEM;
> --
> 1.7.5.4
>
> --
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