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RDMA/cm: Fix missing RDMA_CM_EVENT_REJECTED event after receiving REJ message 

The cm_reset_to_idle() call before formatting event changed the CM_ID
state from IB_CM_REQ_RCVD to be IB_CM_IDLE. It caused to wrong value of
CM_REJ_MESSAGE_REJECTED field.

The result of that was that rdma_reject() calls in the passive side didn't
generate RDMA_CM_EVENT_REJECTED event in the active side.

Fixes: 81ddb41f87 ("RDMA/cm: Allow ib_send_cm_rej() to be done under lock")
Link: https://lore.kernel.org/r/20200406173242.1465911-1-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky 2020-04-06 20:32:42 +03:00 committed by Jason Gunthorpe
parent f70968f05d
commit 0c6949c3d1
1 changed files with 13 additions and 11 deletions
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24
drivers/infiniband/core/cm.c
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@ -1828,11 +1828,9 @@ static void cm_format_mra(struct cm_mra_msg *mra_msg,
static void cm_format_rej(struct cm_rej_msg *rej_msg,
struct cm_id_private *cm_id_priv,
enum ib_cm_rej_reason reason,
void *ari,
u8 ari_length,
const void *private_data,
u8 private_data_len)
enum ib_cm_rej_reason reason, void *ari,
u8 ari_length, const void *private_data,
u8 private_data_len, enum ib_cm_state state)
{
lockdep_assert_held(&cm_id_priv->lock);
@ -1840,7 +1838,7 @@ static void cm_format_rej(struct cm_rej_msg *rej_msg,
IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
be32_to_cpu(cm_id_priv->id.remote_id));
switch(cm_id_priv->id.state) {
switch (state) {
case IB_CM_REQ_RCVD:
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0));
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
@ -1905,8 +1903,9 @@ static void cm_dup_req_handler(struct cm_work *work,
cm_id_priv->private_data_len);
break;
case IB_CM_TIMEWAIT:
cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv,
IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0,
IB_CM_TIMEWAIT);
break;
default:
goto unlock;
@ -2904,6 +2903,7 @@ static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
u8 ari_length, const void *private_data,
u8 private_data_len)
{
enum ib_cm_state state = cm_id_priv->id.state;
struct ib_mad_send_buf *msg;
int ret;
@ -2913,7 +2913,7 @@ static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
(ari && ari_length > IB_CM_REJ_ARI_LENGTH))
return -EINVAL;
switch (cm_id_priv->id.state) {
switch (state) {
case IB_CM_REQ_SENT:
case IB_CM_MRA_REQ_RCVD:
case IB_CM_REQ_RCVD:
@ -2925,7 +2925,8 @@ static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
if (ret)
return ret;
cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
ari, ari_length, private_data, private_data_len);
ari, ari_length, private_data, private_data_len,
state);
break;
case IB_CM_REP_SENT:
case IB_CM_MRA_REP_RCVD:
@ -2934,7 +2935,8 @@ static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
if (ret)
return ret;
cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
ari, ari_length, private_data, private_data_len);
ari, ari_length, private_data, private_data_len,
state);
break;
default:
pr_debug("%s: local_id %d, cm_id->state: %d\n", __func__,