IB/umad: Add P_Key index support
authorRoland Dreier <rolandd@cisco.com>
Wed, 10 Oct 2007 02:59:15 +0000 (19:59 -0700)
committerRoland Dreier <rolandd@cisco.com>
Wed, 10 Oct 2007 02:59:15 +0000 (19:59 -0700)
commit2be8e3ee8efd6f99ce454115c29d09750915021a
tree00e21e061a18c7bd1339ebbb637de9701863312d
parentc01759cee91379cc3cb551bfd7c76f1b51f91ca2
IB/umad: Add P_Key index support

Add support for setting the P_Key index of sent MADs and getting the
P_Key index of received MADs.  This requires a change to the layout of
the ABI structure struct ib_user_mad_hdr, so to avoid breaking
compatibility, we default to the old (unchanged) ABI and add a new
ioctl IB_USER_MAD_ENABLE_PKEY that allows applications that are aware
of the new ABI to opt into using it.

We plan on switching to the new ABI by default in a year or so, and
this patch adds a warning that is printed when an application uses the
old ABI, to push people towards converting to the new ABI.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Hal Rosenstock <hal@xsigo.com>
Documentation/infiniband/user_mad.txt
drivers/infiniband/core/user_mad.c
include/rdma/ib_user_mad.h