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platform: give the platform an opportunity to override default-unmanaged

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Some out of tree drivers add Ethernet devices that are supposed to be managed
by other their tooling, e.g. VirtualBox or VMWare.

Rather than hardcoding their drivers (at least VirtualBox doesn't even set a
"driver" property in sysfs) or hardcoding a logic that identifies such devices
let's just add a possibility to blacklist them in udev. This makes it possible
for whoever who ships such a driver to ship rules that prevent NetworkManager
from managing the device itself.

Furthermore it makes it possible for the user with special needs leverage the
flexibility of udev rules to override the defaults. In the end the user can
decide to let NetworkManager manage default-unmanaged interfaces such as VEth
or turn on default-unmanaged for devices on a particular bus.

An udev rule for VirtualBox would look like this:

  SUBSYSTEM=="net", ENV{INTERFACE}=="vboxnet[0-9]*", ENV{NM_UNMANAGED}="1"
This commit is contained in:
Lubomir Rintel
2015-01-22 16:41:15 +01:00
parent 4a05869557
commit 85ee1f4a9c
6 changed files with 75 additions and 1 deletions
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15
src/platform/nm-linux-platform.c
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@@ -2395,6 +2395,20 @@ link_get_type_name (NMPlatform *platform, int ifindex)
return type;
}
static gboolean
link_get_unmanaged (NMPlatform *platform, int ifindex, gboolean *managed)
{
NMLinuxPlatformPrivate *priv = NM_LINUX_PLATFORM_GET_PRIVATE (platform);
GUdevDevice *udev_device = g_hash_table_lookup (priv->udev_devices, GINT_TO_POINTER (ifindex));
if (g_udev_device_get_property (udev_device, "NM_UNMANAGED")) {
*managed = g_udev_device_get_property_as_boolean (udev_device, "NM_UNMANAGED");
return TRUE;
}
return FALSE;
}
static guint32
link_get_flags (NMPlatform *platform, int ifindex)
{
@@ -4571,6 +4585,7 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
platform_class->link_get_name = link_get_name;
platform_class->link_get_type = link_get_type;
platform_class->link_get_type_name = link_get_type_name;
platform_class->link_get_unmanaged = link_get_unmanaged;
platform_class->link_refresh = link_refresh;