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udev: hwdb - fix OUI lookup

This commit is contained in:
Kay Sievers 2012-12-02 02:00:57 +01:00
parent 7e15bd3362
commit 472780d8b1
1 changed files with 20 additions and 8 deletions
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28
src/udev/udev-builtin-net_id.c
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@ -18,18 +18,27 @@
***/
/*
* prefixes:
* predictable network interface device names based on:
* - firmware/bios-provided index numbers for on-board devices
* - firmware-provided pci-express hotplug slot index number
* - physical/geographical location of the hardware
* - the interface's MAC address
*
* two character prefixes based on the type of interface:
* en -- ethernet
* wl -- wlan
* ww -- wwan
*
* types:
* o<index> -- on-board device index
* s<slot>[f<function>] -- hotplug slot number
* type of names:
* o<index> -- on-board device index number
* s<slot>[f<function>] -- hotplug slot index number
* x<MAC> -- MAC address
* p<bus>s<slot>[f<function>] -- PCI/physical location
* p<bus>s<slot>[f<function>] -- PCI geographical location
*
* example:
* All multi-function devices will carry the [f<function>] number in the
* device name, including the function 0 device.
*
* examples:
* ID_NET_NAME_ONBOARD=eno1
* ID_NET_NAME_SLOT=ens1
* ID_NET_NAME_SLOT=ens2f0
@ -82,6 +91,7 @@ static int dev_pci_onboard(struct udev_device *dev, struct udev_device *parent,
return 0;
}
/* read the 256 bytes PCI configuration space to check for multi-function */
static bool is_pci_singlefunction(struct udev_device *dev) {
char filename[256];
FILE *f;
@ -215,8 +225,10 @@ static int dev_mac(struct udev_device *dev, const char *prefix, bool test) {
return -EINVAL;
/* add IEEE Organizationally Unique Identifier */
snprintf(str, sizeof(str), "OUI:%X%X%X", a1, a2, a3);
udev_builtin_hwdb_lookup(dev, str, test);
if (a1 + a2 + a3 > 0) {
snprintf(str, sizeof(str), "OUI:%02X%02X%02X", a1, a2, a3);
udev_builtin_hwdb_lookup(dev, str, test);
}
snprintf(str, sizeof(str), "%sx%02x%02x%02x%02x%02x%02x", prefix, a1, a2, a3, a4, a5, a6);
return udev_builtin_add_property(dev, test, "ID_NET_NAME_MAC", str);