Section: User Commands (1)
Updated: Nov 28, 2010
biosdevname - give BIOS-given name of a device
biosdevname takes a kernel device name as an
argument, and returns the BIOS-given name it "should" be.
- -i, --interface
Treat [args] as ethernet devs
- -d, --debug
- -p, --policy [physical|all_ethN]
- -P, --prefix [string]
string use for embedded NICs in the physical policy (default=em)
- -x, --nopirq
Do not use $PIR table for mapping PCI device to slot. Some BIOS have
- -s, --smbios [x.y]
Require minimum SMBIOS version x.y
policy is the current default. However, when invoking biosdevname in
udev rules, one should always specify the policy you want, as the
default has changed over time.
policy uses the following scheme:
- em<port>[_<virtual instance>]
for embedded NICs
- p<slot>p<port>[_<virtual instance>]
for cards in PCI slots
policy makes a best guess at what the device order should be, with
embedded devices first, PCI cards in ascending slot order, and ports
in ascending PCI bus/device/function order breadth-first. However,
does not work
if your PCI devices are hot-plugged or hot-pluggable, including the
virtual functions on an SR-IOV device. In a hot-plug scenario, each separate
udev instance will be invoked in parallel, while the device tree is
still being populated with new devices. Each udev instance will see a
different PCI tree, and thus cannot provide consistent enumeration.
Use of this policy should be limited to only scenarios where all PCI
devices are present at boot (cold-plug).
Returns 0 on success, with BIOS-suggested name printed to stdout.
Returns 1 on provided device name lookup failure.
Returns 2 if system BIOS does not provide naming information.
biosdevname requires system BIOS to provide naming information, either
via SMBIOS or sysfs files.
Returns 3 if not run as root but requires root privileges.
Returns 4 if running in a virtual machine.
package contains two tools useful for debugging BIOS features that
biosdevname uses, specifically
to read the SMBIOS Type 9 and Type 41 tables, and
to read the PCI IRQ Routing Table. Please include the output of each
of these programs in any bug reports.
biosdevname was written by Matt Domsch <Matt_Domsch@dell.com
This manual page was written by Rudy Gevaert <Rudy.Gevaert@UGent.be>,
for the Debian project (but may be used by others).