[PATCH rdma-next 11/31] IB/cm: Add debug prints to ib_cm

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

From: Daniel Jurgens <danielj-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

Add debug prints to the error paths in the connection manager control
flows, to help debug connection management problems.

Signed-off-by: Daniel Jurgens <danielj-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/infiniband/core/cm.c | 51 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index fe7a5e0d79b0..cbb385e02947 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1841,6 +1841,8 @@ static int cm_req_handler(struct cm_work *work)
 
 	listen_cm_id_priv = cm_match_req(work, cm_id_priv);
 	if (!listen_cm_id_priv) {
+		pr_debug("%s: local_id %d, no listen_cm_id_priv\n", __func__,
+			 be32_to_cpu(cm_id->local_id));
 		ret = -EINVAL;
 		goto free_timeinfo;
 	}
@@ -1998,6 +2000,8 @@ int ib_send_cm_rep(struct ib_cm_id *cm_id,
 	spin_lock_irqsave(&cm_id_priv->lock, flags);
 	if (cm_id->state != IB_CM_REQ_RCVD &&
 	    cm_id->state != IB_CM_MRA_REQ_SENT) {
+		pr_debug("%s: local_comm_id %d, cm_id->state: %d\n", __func__,
+			 be32_to_cpu(cm_id_priv->id.local_id), cm_id->state);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -2064,6 +2068,8 @@ int ib_send_cm_rtu(struct ib_cm_id *cm_id,
 	spin_lock_irqsave(&cm_id_priv->lock, flags);
 	if (cm_id->state != IB_CM_REP_RCVD &&
 	    cm_id->state != IB_CM_MRA_REP_SENT) {
+		pr_debug("%s: local_id %d, cm_id->state %d\n", __func__,
+			 be32_to_cpu(cm_id->local_id), cm_id->state);
 		ret = -EINVAL;
 		goto error;
 	}
@@ -2171,6 +2177,8 @@ static int cm_rep_handler(struct cm_work *work)
 	cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
 	if (!cm_id_priv) {
 		cm_dup_rep_handler(work);
+		pr_debug("%s: remote_comm_id %d, no cm_id_priv\n", __func__,
+			 be32_to_cpu(rep_msg->remote_comm_id));
 		return -EINVAL;
 	}
 
@@ -2184,6 +2192,10 @@ static int cm_rep_handler(struct cm_work *work)
 	default:
 		spin_unlock_irq(&cm_id_priv->lock);
 		ret = -EINVAL;
+		pr_debug("%s: cm_id_priv->id.state: %d, local_comm_id %d, remote_comm_id %d\n",
+			 __func__, cm_id_priv->id.state,
+			 be32_to_cpu(rep_msg->local_comm_id),
+			 be32_to_cpu(rep_msg->remote_comm_id));
 		goto error;
 	}
 
@@ -2197,6 +2209,8 @@ static int cm_rep_handler(struct cm_work *work)
 		spin_unlock(&cm.lock);
 		spin_unlock_irq(&cm_id_priv->lock);
 		ret = -EINVAL;
+		pr_debug("%s: Failed to insert remote id %d\n", __func__,
+			 be32_to_cpu(rep_msg->remote_comm_id));
 		goto error;
 	}
 	/* Check for a stale connection. */
@@ -2214,6 +2228,10 @@ static int cm_rep_handler(struct cm_work *work)
 			     IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
 			     NULL, 0);
 		ret = -EINVAL;
+		pr_debug("%s: Stale connection. local_comm_id %d, remote_comm_id %d\n",
+			 __func__, be32_to_cpu(rep_msg->local_comm_id),
+			 be32_to_cpu(rep_msg->remote_comm_id));
+
 		if (cur_cm_id_priv) {
 			cm_id = &cur_cm_id_priv->id;
 			ib_send_cm_dreq(cm_id, NULL, 0);
@@ -2360,6 +2378,8 @@ int ib_send_cm_dreq(struct ib_cm_id *cm_id,
 	cm_id_priv = container_of(cm_id, struct cm_id_private, id);
 	spin_lock_irqsave(&cm_id_priv->lock, flags);
 	if (cm_id->state != IB_CM_ESTABLISHED) {
+		pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__,
+			 be32_to_cpu(cm_id->local_id), cm_id->state);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -2429,6 +2449,8 @@ int ib_send_cm_drep(struct ib_cm_id *cm_id,
 	if (cm_id->state != IB_CM_DREQ_RCVD) {
 		spin_unlock_irqrestore(&cm_id_priv->lock, flags);
 		kfree(data);
+		pr_debug("%s: local_id %d, cm_idcm_id->state(%d) != IB_CM_DREQ_RCVD\n",
+			 __func__, be32_to_cpu(cm_id->local_id), cm_id->state);
 		return -EINVAL;
 	}
 
@@ -2494,6 +2516,9 @@ static int cm_dreq_handler(struct cm_work *work)
 		atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
 				counter[CM_DREQ_COUNTER]);
 		cm_issue_drep(work->port, work->mad_recv_wc);
+		pr_debug("%s: no cm_id_priv, local_comm_id %d, remote_comm_id %d\n",
+			 __func__, be32_to_cpu(dreq_msg->local_comm_id),
+			 be32_to_cpu(dreq_msg->remote_comm_id));
 		return -EINVAL;
 	}
 
@@ -2536,6 +2561,9 @@ static int cm_dreq_handler(struct cm_work *work)
 				counter[CM_DREQ_COUNTER]);
 		goto unlock;
 	default:
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		goto unlock;
 	}
 	cm_id_priv->id.state = IB_CM_DREQ_RCVD;
@@ -2639,6 +2667,8 @@ int ib_send_cm_rej(struct ib_cm_id *cm_id,
 		cm_enter_timewait(cm_id_priv);
 		break;
 	default:
+		pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__,
+			 be32_to_cpu(cm_id_priv->id.local_id), cm_id->state);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -2749,6 +2779,9 @@ static int cm_rej_handler(struct cm_work *work)
 		/* fall through */
 	default:
 		spin_unlock_irq(&cm_id_priv->lock);
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		ret = -EINVAL;
 		goto out;
 	}
@@ -2812,6 +2845,9 @@ int ib_send_cm_mra(struct ib_cm_id *cm_id,
 		}
 		/* fall through */
 	default:
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		ret = -EINVAL;
 		goto error1;
 	}
@@ -2913,6 +2949,9 @@ static int cm_mra_handler(struct cm_work *work)
 				counter[CM_MRA_COUNTER]);
 		/* fall through */
 	default:
+		pr_debug("%s local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		goto out;
 	}
 
@@ -3693,6 +3732,7 @@ static void cm_work_handler(struct work_struct *_work)
 		ret = cm_timewait_handler(work);
 		break;
 	default:
+		pr_debug("cm_event.event: 0x%x\n", work->cm_event.event);
 		ret = -EINVAL;
 		break;
 	}
@@ -3728,6 +3768,8 @@ static int cm_establish(struct ib_cm_id *cm_id)
 		ret = -EISCONN;
 		break;
 	default:
+		pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__,
+			 be32_to_cpu(cm_id->local_id), cm_id->state);
 		ret = -EINVAL;
 		break;
 	}
@@ -3925,6 +3967,9 @@ static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
 		ret = 0;
 		break;
 	default:
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		ret = -EINVAL;
 		break;
 	}
@@ -3972,6 +4017,9 @@ static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
 		ret = 0;
 		break;
 	default:
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		ret = -EINVAL;
 		break;
 	}
@@ -4031,6 +4079,9 @@ static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
 		ret = 0;
 		break;
 	default:
+		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
+			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
+			 cm_id_priv->id.state);
 		ret = -EINVAL;
 		break;
 	}
-- 
2.15.0

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