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rds: rdma: add consumer reject

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For legacy protocol version incompatibility with non linux RDS,
consumer reject reason being used to convey it to peer. But the
choice of reject reason value as '1' was really poor.

Anyway for interoperability reasons with shipping products,
it needs to be supported. For any future versions, properly
encoded reject reason should to be used.

Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
[yanjun.zhu@oracle.com: Adapted original patch with ipv6 changes]
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
This commit is contained in:
Santosh Shilimkar
2018-10-23 23:09:00 -04:00
parent cdc306a5c9
commit d021fabf52
3 changed files with 22 additions and 2 deletions
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12
net/rds/rdma_transport.c
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@@ -51,6 +51,8 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id,
struct rds_connection *conn = cm_id->context;
struct rds_transport *trans;
int ret = 0;
int *err;
u8 len;
rdsdebug("conn %p id %p handling event %u (%s)\n", conn, cm_id,
event->event, rdma_event_msg(event->event));
@@ -106,8 +108,18 @@ static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id,
break;
case RDMA_CM_EVENT_REJECTED:
if (!conn)
break;
err = (int *)rdma_consumer_reject_data(cm_id, event, &len);
if (!err || (err && ((*err) == RDS_RDMA_REJ_INCOMPAT))) {
pr_warn("RDS/RDMA: conn <%pI6c, %pI6c> rejected, dropping connection\n",
&conn->c_laddr, &conn->c_faddr);
conn->c_proposed_version = RDS_PROTOCOL_COMPAT_VERSION;
rds_conn_drop(conn);
}
rdsdebug("Connection rejected: %s\n",
rdma_reject_msg(cm_id, event->status));
break;
/* FALLTHROUGH */
case RDMA_CM_EVENT_ADDR_ERROR:
case RDMA_CM_EVENT_ROUTE_ERROR: