Add a new object for shared test utilities
Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxxxxxxxxxxxx>
---
v2: defer mdev initialisation until after netdev register
---
net/mctp/Makefile | 3 ++
net/mctp/test/utils.c | 67 +++++++++++++++++++++++++++++++++++++++++++
net/mctp/test/utils.h | 20 +++++++++++++
3 files changed, 90 insertions(+)
create mode 100644 net/mctp/test/utils.c
create mode 100644 net/mctp/test/utils.h
diff --git a/net/mctp/Makefile b/net/mctp/Makefile
index 0171333384d7..6cd55233e685 100644
--- 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
index 000000000000..cc6b8803aa9d
--- /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
index 000000000000..df6aa1c03440
--- /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 */
--
2.33.0
