mctp: Add test utils

Add a new object for shared test utilities

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/mctp/Makefile b/net/mctp/Makefile
index 0171333..6cd5523 100644 (file)
--- a/net/mctp/Makefile
+++ b/net/mctp/Makefile
@@ -1,3 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_MCTP) += mctp.o
 mctp-objs := af_mctp.o device.o route.o neigh.o
+
+# tests
+obj-$(CONFIG_MCTP_TEST) += test/utils.o

diff --git a/net/mctp/test/utils.c b/net/mctp/test/utils.c
new file mode 100644 (file)
index 0000000..cc6b880
--- /dev/null
+++ b/net/mctp/test/utils.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/netdevice.h>
+#include <linux/mctp.h>
+#include <linux/if_arp.h>
+
+#include <net/mctpdevice.h>
+#include <net/pkt_sched.h>
+
+#include "utils.h"
+
+static netdev_tx_t mctp_test_dev_tx(struct sk_buff *skb,
+                                   struct net_device *ndev)
+{
+       kfree(skb);
+       return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops mctp_test_netdev_ops = {
+       .ndo_start_xmit = mctp_test_dev_tx,
+};
+
+static void mctp_test_dev_setup(struct net_device *ndev)
+{
+       ndev->type = ARPHRD_MCTP;
+       ndev->mtu = MCTP_DEV_TEST_MTU;
+       ndev->hard_header_len = 0;
+       ndev->addr_len = 0;
+       ndev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;
+       ndev->flags = IFF_NOARP;
+       ndev->netdev_ops = &mctp_test_netdev_ops;
+       ndev->needs_free_netdev = true;
+}
+
+struct mctp_test_dev *mctp_test_create_dev(void)
+{
+       struct mctp_test_dev *dev;
+       struct net_device *ndev;
+       int rc;
+
+       ndev = alloc_netdev(sizeof(*dev), "mctptest%d", NET_NAME_ENUM,
+                           mctp_test_dev_setup);
+       if (!ndev)
+               return NULL;
+
+       dev = netdev_priv(ndev);
+       dev->ndev = ndev;
+
+       rc = register_netdev(ndev);
+       if (rc) {
+               free_netdev(ndev);
+               return NULL;
+       }
+
+       rcu_read_lock();
+       dev->mdev = __mctp_dev_get(ndev);
+       mctp_dev_hold(dev->mdev);
+       rcu_read_unlock();
+
+       return dev;
+}
+
+void mctp_test_destroy_dev(struct mctp_test_dev *dev)
+{
+       mctp_dev_put(dev->mdev);
+       unregister_netdev(dev->ndev);
+}

diff --git a/net/mctp/test/utils.h b/net/mctp/test/utils.h
new file mode 100644 (file)
index 0000000..df6aa1c
--- /dev/null
+++ b/net/mctp/test/utils.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __NET_MCTP_TEST_UTILS_H
+#define __NET_MCTP_TEST_UTILS_H
+
+#include <kunit/test.h>
+
+#define MCTP_DEV_TEST_MTU      68
+
+struct mctp_test_dev {
+       struct net_device *ndev;
+       struct mctp_dev *mdev;
+};
+
+struct mctp_test_dev;
+
+struct mctp_test_dev *mctp_test_create_dev(void);
+void mctp_test_destroy_dev(struct mctp_test_dev *dev);
+
+#endif /* __NET_MCTP_TEST_UTILS_H */