tree 519458581cf3b8dd7c7a6d19c29572efb3405df1
parent 755807a296f77ca7c31dc000afdfe1e5172bbf72
author Rolf Manderscheid <rvm@obsidianresearch.com> 1197319121 -0700
committer Roland Dreier <rolandd@cisco.com> 1201299337 -0800

IPoIB: improve IPv4/IPv6 to IB mcast mapping functions

An IPoIB subnet on an IB fabric that spans multiple IB subnets can't
use link-local scope in multicast GIDs.  The existing routines that
map IP/IPv6 multicast addresses into IB link-level addresses hard-code
the scope to link-local, and they also leave the partition key field
uninitialised.  This patch adds a parameter (the link-level broadcast
address) to the mapping routines, allowing them to initialise both the
scope and the P_Key appropriately, and fixes up the call sites.

The next step will be to add a way to configure the scope for an IPoIB
interface.

Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>