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platform: add nm_platform_link_get_dev_id()

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Some devices (s390 OSA and ipvlan) use the same link layer address
for different interfaces, and dev_id is what differentiates them.
This commit is contained in:
Dan Williams
2015-03-24 12:35:36 -05:00
parent 32e1d6a9a9
commit 25a286e999
4 changed files with 60 additions and 1 deletions
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25
src/platform/nm-linux-platform.c
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@@ -2744,6 +2744,30 @@ link_get_physical_port_id (NMPlatform *platform, int ifindex)
return id;
}
static guint
link_get_dev_id (NMPlatform *platform, int ifindex)
{
const char *ifname;
gs_free char *path = NULL, *id = NULL;
gint64 int_val;
ifname = nm_platform_link_get_name (ifindex);
if (!ifname)
return 0;
ifname = ASSERT_VALID_PATH_COMPONENT (ifname);
path = g_strdup_printf ("/sys/class/net/%s/dev_id", ifname);
id = sysctl_get (platform, path);
if (!id || !*id)
return 0;
/* Value is reported as hex */
int_val = _nm_utils_ascii_str_to_int64 (id, 16, 0, G_MAXUINT16, 0);
return errno ? 0 : (int) int_val;
}
static int
vlan_add (NMPlatform *platform, const char *name, int parent, int vlan_id, guint32 vlan_flags)
{
@@ -4608,6 +4632,7 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
platform_class->link_set_mtu = link_set_mtu;
platform_class->link_get_physical_port_id = link_get_physical_port_id;
platform_class->link_get_dev_id = link_get_dev_id;
platform_class->link_get_wake_on_lan = link_get_wake_on_lan;
platform_class->link_supports_carrier_detect = link_supports_carrier_detect;