From: Parav Pandit <parav@xxxxxxxxxxxx>
For RoCE, when CM requests are received for RC and UD connections,
netdevice of the incoming request is unavailable. Because of that
CM requests are always forwarded to init_net namespace.
Now that we have the GID attribute available, introduce SGID
attribute in incoming CM requests and refer to the netdevice of it.
This is similar to existing SGID attribute field in outgoing CM
requests for RC and UD transports.
Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx>
Reviewed-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/cm.c | 5 ++++-
drivers/infiniband/core/cma.c | 28 ++++++++++++++++++++++------
include/rdma/ib_cm.h | 13 +++++++++++++
3 files changed, 39 insertions(+), 7 deletions(-)
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 4724cb09b69d..6e39c27dca8e 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1716,6 +1716,7 @@ static void cm_format_req_event(struct cm_work *work,
param->retry_count = cm_req_get_retry_count(req_msg);
param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
param->srq = cm_req_get_srq(req_msg);
+ param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
work->cm_event.private_data = &req_msg->private_data;
}
@@ -3532,6 +3533,7 @@ int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
EXPORT_SYMBOL(ib_send_cm_sidr_req);
static void cm_format_sidr_req_event(struct cm_work *work,
+ const struct cm_id_private *rx_cm_id,
struct ib_cm_id *listen_id)
{
struct cm_sidr_req_msg *sidr_req_msg;
@@ -3545,6 +3547,7 @@ static void cm_format_sidr_req_event(struct cm_work *work,
param->service_id = sidr_req_msg->service_id;
param->bth_pkey = cm_get_bth_pkey(work);
param->port = work->port->port_num;
+ param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr;
work->cm_event.private_data = &sidr_req_msg->private_data;
}
@@ -3602,7 +3605,7 @@ static int cm_sidr_req_handler(struct cm_work *work)
cm_id_priv->id.service_id = sidr_req_msg->service_id;
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
- cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
+ cm_format_sidr_req_event(work, cm_id_priv, &cur_cm_id_priv->id);
cm_process_work(cm_id_priv, work);
cm_deref_id(cur_cm_id_priv);
return 0;
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index f2bf997b62cd..26623f9cff32 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1371,6 +1371,22 @@ static bool validate_net_dev(struct net_device *net_dev,
}
}
+static struct net_device *
+roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
+{
+ const struct ib_gid_attr *sgid_attr = NULL;
+
+ if (ib_event->event == IB_CM_REQ_RECEIVED)
+ sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
+ else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
+ sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
+
+ if (!sgid_attr)
+ return NULL;
+ dev_hold(sgid_attr->ndev);
+ return sgid_attr->ndev;
+}
+
static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
struct cma_req_info *req)
{
@@ -1386,8 +1402,12 @@ static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
if (err)
return ERR_PTR(err);
- net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
- gid, listen_addr);
+ if (rdma_protocol_roce(req->device, req->port))
+ net_dev = roce_get_net_dev_by_cm_event(ib_event);
+ else
+ net_dev = ib_get_net_dev_by_params(req->device, req->port,
+ req->pkey,
+ gid, listen_addr);
if (!net_dev)
return ERR_PTR(-ENODEV);
@@ -1508,10 +1528,6 @@ static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
/* Assuming the protocol is AF_IB */
*net_dev = NULL;
- } else if (rdma_protocol_roce(req.device, req.port)) {
- /* TODO find the net dev matching the request parameters
- * through the RoCE GID table */
- *net_dev = NULL;
} else {
return ERR_CAST(*net_dev);
}
diff --git a/include/rdma/ib_cm.h b/include/rdma/ib_cm.h
index c98d603c0b63..568708a87239 100644
--- a/include/rdma/ib_cm.h
+++ b/include/rdma/ib_cm.h
@@ -120,6 +120,13 @@ struct ib_cm_req_event_param {
struct sa_path_rec *primary_path;
struct sa_path_rec *alternate_path;
+ /*
+ * SGID attribute of the primary path. Currently only
+ * useful for RoCE. Alternate path GID attributes
+ * are not yet supported.
+ */
+ const struct ib_gid_attr *ppath_sgid_attr;
+
__be64 remote_ca_guid;
u32 remote_qkey;
u32 remote_qpn;
@@ -226,6 +233,12 @@ struct ib_cm_apr_event_param {
struct ib_cm_sidr_req_event_param {
struct ib_cm_id *listen_id;
__be64 service_id;
+
+ /*
+ * SGID attribute of the request. Currently only
+ * useful for RoCE.
+ */
+ const struct ib_gid_attr *sgid_attr;
/* P_Key that was used by the GMP's BTH header */
u16 bth_pkey;
u8 port;
--
2.14.4
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