[openib-general] SLES10 /sbin/ip shows wrong multicast addresses for IPoIB devices

[Or Gerlitz]

I see now that /sbin/ip that comes with SLES10 iproute2-2.6.15-14.4 shows wrong
multicast hardware (L2) addresses for IPoIB devices, where on SLES9 it works
just fine (and the package is iproute2-2.4.7-866.8)

With strac-ing it, i can see that utility uses /proc/net/dev_mcast as the
source for the hw mcast addresses, where these are reported fine, but then
the lower 32 bits are somehow chopped and replaced by zeros, see below.

Or.

sage:~ # /sbin/ip a s ib1
6: ib1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 128
    link/infiniband 00:00:04:05:fe:80:00:00:00:00:00:00:00:02:c9:02:00:20:13:f2 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
    inet 192.168.10.153/24 brd 192.168.10.255 scope global ib1
    inet6 fe80::202:c902:20:13f2/64 scope link
       valid_lft forever preferred_lft forever

sage:~ # /sbin/ip m s ib1

6:      ib1
        link  00:ff:ff:ff:ff:12:40:1b:00:00:00:00:00:00:00:00:00:00:00:00
        link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:01:00:00:00:00
        link  00:ff:ff:ff:ff:12:60:1b:00:00:00:00:00:00:00:00:00:00:00:00
        link  00:ff:ff:ff:ff:12:40:1b:00:00:00:00:00:00:00:00:00:00:00:00
        inet  224.5.5.5
        inet  224.0.0.1
        inet6 ff02::1:ff20:13f2
        inet6 ff02::1

sage:~ # strace /sbin/ip m s ib1 2>&1 | grep open

open("/etc/ld.so.cache", O_RDONLY)      = 3
open("/lib64/libresolv.so.2", O_RDONLY) = 3
open("/lib64/libc.so.6", O_RDONLY)      = 3
open("/proc/net/dev_mcast", O_RDONLY)   = 4
open("/proc/net/igmp", O_RDONLY)        = 4
open("/proc/net/igmp6", O_RDONLY)       = 4

sage:~ # cat /proc/net/dev_mcast | grep ib1

6    ib1             1     0     00ffffffff12401b000000000000000000050505
6    ib1             1     0     00ffffffff12601b0000000000000001ff2013f2
6    ib1             1     0     00ffffffff12601b000000000000000000000001
6    ib1             1     0     00ffffffff12401b000000000000000000000001