Linux bridge STP long path cost (802.1t-2001)

A few years ago, we had to implement STP on Linux boxes, using the long path cost standard. If changing the cost values from userspace is not really your thing, here's a patched br_if.c source (mind you, it's for an old kernel version, probably 2.6.17 or something).

Edit: for those who are interested in the actual numbers, not the Linux code:

http://en.wikipedia.org/wiki/Spanning_tree_protocol#Data_rate_and_STP_path_cost