Allow rdma_cm/ipoib multicast inter operability for RDMA_PS_IPOIB IDs. This is
implemented by
having the rdma cm use the --same-- qkey and multicast gid used by ipoib where
for RDMA_UD_UDP
IDs the rdma cm uses a qkey of its own and adds a signature byte to the
multicast gid.
Signed-off-by: Or Gerlitz <[EMAIL PROTECTED]>
Index: rdma-dev/drivers/infiniband/core/cma.c
===================================================================
--- rdma-dev.orig/drivers/infiniband/core/cma.c 2007-01-23 15:56:01.000000000
+0200
+++ rdma-dev/drivers/infiniband/core/cma.c 2007-01-23 15:56:23.000000000
+0200
@@ -2473,7 +2473,10 @@ static int cma_join_ib_multicast(struct
return ret;
ip_ib_mc_map(sin->sin_addr.s_addr, mc_map);
- mc_map[7] = 0x01; /* Use RDMA CM signature */
+ if (id_priv->id.ps == RDMA_PS_UDP) {
+ rec.qkey = RDMA_UD_QKEY; /* Use RDMA CM QKEY */
+ mc_map[7] = 0x01; /* Use RDMA CM signature */
+ }
mc_map[8] = ib_addr_get_pkey(dev_addr) >> 8;
mc_map[9] = (unsigned char) ib_addr_get_pkey(dev_addr);
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