[PATCH] IB CM: support CM redir

Changes to CM to support CM and port redirection (REJ reason 24).

Signed-off-by: John Kingman <kingman <at> storagegear.com>
Signed-off-by: Sean Hefty <[e-mail]>
Signed-off-by: Roland Dreier <[e-mail]>

drivers/infiniband/core/cm.c

···
 	if (IS_ERR(ah))
 		return PTR_ERR(ah);
 
-	m = ib_create_send_mad(mad_agent, 1, cm_id_priv->av.pkey_index,
+	m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, 
+			       cm_id_priv->av.pkey_index,
 			       ah, 0, sizeof(struct ib_mad_hdr),
 			       sizeof(struct ib_mad)-sizeof(struct ib_mad_hdr),
 			       GFP_ATOMIC);
···
 	cm_id_priv->id.state = IB_CM_IDLE;
 	cm_id_priv->id.cm_handler = cm_handler;
 	cm_id_priv->id.context = context;
+	cm_id_priv->id.remote_cm_qpn = 1;
 	ret = cm_alloc_id(cm_id_priv);
 	if (ret)
 		goto error;

include/rdma/ib_cm.h

···
 	enum ib_cm_lap_state	lap_state;	/* internal CM/debug use */
 	__be32			local_id;
 	__be32			remote_id;
+	u32			remote_cm_qpn;  /* 1 unless redirected */
 };
 
 /**