How do I find module implementing a net interface, when there is no device at /sys/class/net/eth0?
ls /sys/class/net/eth0/
addr_assign_type carrier iflink speed
addr_len dev_id link_mode statistics/
address dormant mtu subsystem@
brforward duplex netdev_group tx_queue_len
bridge/ flags operstate type
brif/ ifalias power/ uevent
broadcast ifindex queues/
The dev_id seems promising at first but the dev_id for eth0 is the same as for lo, the loopback interface.
The "linux" I'm dealing with seems modern enough (having a 3.3.x kernel) but it doesn't align in this particular detail with the descriptions I've seen, which apparently support things like lspci and other handy but rarely-used utilities.
I've read this popular, related question but its answer relies on the device symlink which the system in question doesn't have.
