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-rw-r--r--drivers/infiniband/core/device.c46
-rw-r--r--include/rdma/ib_verbs.h27
2 files changed, 73 insertions, 0 deletions
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index ce317e623862..a9a27816991a 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -38,6 +38,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/netdevice.h>
#include <rdma/rdma_netlink.h>
#include "core_priv.h"
@@ -780,6 +781,51 @@ int ib_find_pkey(struct ib_device *device,
}
EXPORT_SYMBOL(ib_find_pkey);
+/**
+ * ib_get_net_dev_by_params() - Return the appropriate net_dev
+ * for a received CM request
+ * @dev: An RDMA device on which the request has been received.
+ * @port: Port number on the RDMA device.
+ * @pkey: The Pkey the request came on.
+ * @gid: A GID that the net_dev uses to communicate.
+ * @addr: Contains the IP address that the request specified as its
+ * destination.
+ */
+struct net_device *ib_get_net_dev_by_params(struct ib_device *dev,
+ u8 port,
+ u16 pkey,
+ const union ib_gid *gid,
+ const struct sockaddr *addr)
+{
+ struct net_device *net_dev = NULL;
+ struct ib_client_data *context;
+
+ if (!rdma_protocol_ib(dev, port))
+ return NULL;
+
+ down_read(&lists_rwsem);
+
+ list_for_each_entry(context, &dev->client_data_list, list) {
+ struct ib_client *client = context->client;
+
+ if (context->going_down)
+ continue;
+
+ if (client->get_net_dev_by_params) {
+ net_dev = client->get_net_dev_by_params(dev, port, pkey,
+ gid, addr,
+ context->data);
+ if (net_dev)
+ break;
+ }
+ }
+
+ up_read(&lists_rwsem);
+
+ return net_dev;
+}
+EXPORT_SYMBOL(ib_get_net_dev_by_params);
+
static int __init ib_core_init(void)
{
int ret;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 449609b70928..fd7a6950df75 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -48,6 +48,7 @@
#include <linux/rwsem.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
+#include <linux/socket.h>
#include <uapi/linux/if_ether.h>
#include <linux/atomic.h>
@@ -1765,6 +1766,28 @@ struct ib_client {
void (*add) (struct ib_device *);
void (*remove)(struct ib_device *, void *client_data);
+ /* Returns the net_dev belonging to this ib_client and matching the
+ * given parameters.
+ * @dev: An RDMA device that the net_dev use for communication.
+ * @port: A physical port number on the RDMA device.
+ * @pkey: P_Key that the net_dev uses if applicable.
+ * @gid: A GID that the net_dev uses to communicate.
+ * @addr: An IP address the net_dev is configured with.
+ * @client_data: The device's client data set by ib_set_client_data().
+ *
+ * An ib_client that implements a net_dev on top of RDMA devices
+ * (such as IP over IB) should implement this callback, allowing the
+ * rdma_cm module to find the right net_dev for a given request.
+ *
+ * The caller is responsible for calling dev_put on the returned
+ * netdev. */
+ struct net_device *(*get_net_dev_by_params)(
+ struct ib_device *dev,
+ u8 port,
+ u16 pkey,
+ const union ib_gid *gid,
+ const struct sockaddr *addr,
+ void *client_data);
struct list_head list;
};
@@ -3014,4 +3037,8 @@ static inline int ib_check_mr_access(int flags)
int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
struct ib_mr_status *mr_status);
+struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port,
+ u16 pkey, const union ib_gid *gid,
+ const struct sockaddr *addr);
+
#endif /* IB_VERBS_H */

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