RDMA/core: Add iterator over ib_devices
The coming nldev needs to iterate over all IB devices in the system
and in order to not expose the ib_devices list outside the devices.c,
it is necessary to provide function iterator.
Current version is written explicitly for nldev callback to avoid
over-engineering at this stage, but it can be easily extended for
other types.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 33a3951..8828f262 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -893,6 +893,31 @@ void ib_enum_all_roce_netdevs(roce_netdev_filter filter,
}
/**
+ * ib_enum_all_devs - enumerate all ib_devices
+ * @cb: Callback to call for each found ib_device
+ *
+ * Enumerates all ib_devices and calls callback() on each device.
+ */
+int ib_enum_all_devs(nldev_callback nldev_cb, struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct ib_device *dev;
+ unsigned int idx = 0;
+ int ret = 0;
+
+ down_read(&lists_rwsem);
+ list_for_each_entry(dev, &device_list, core_list) {
+ ret = nldev_cb(dev, skb, cb, idx);
+ if (ret)
+ break;
+ idx++;
+ }
+
+ up_read(&lists_rwsem);
+ return ret;
+}
+
+/**
* ib_query_pkey - Get P_Key table entry
* @device:Device to query
* @port_num:Port number to query