1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/netdevice.h> 4 #include <linux/mctp.h> 5 #include <linux/if_arp.h> 6 7 #include <net/mctpdevice.h> 8 #include <net/pkt_sched.h> 9 10 #include "utils.h" 11 12 static netdev_tx_t mctp_test_dev_tx(struct sk_buff *skb, 13 struct net_device *ndev) 14 { 15 kfree(skb); 16 return NETDEV_TX_OK; 17 } 18 19 static const struct net_device_ops mctp_test_netdev_ops = { 20 .ndo_start_xmit = mctp_test_dev_tx, 21 }; 22 23 static void mctp_test_dev_setup(struct net_device *ndev) 24 { 25 ndev->type = ARPHRD_MCTP; 26 ndev->mtu = MCTP_DEV_TEST_MTU; 27 ndev->hard_header_len = 0; 28 ndev->addr_len = 0; 29 ndev->tx_queue_len = DEFAULT_TX_QUEUE_LEN; 30 ndev->flags = IFF_NOARP; 31 ndev->netdev_ops = &mctp_test_netdev_ops; 32 ndev->needs_free_netdev = true; 33 } 34 35 struct mctp_test_dev *mctp_test_create_dev(void) 36 { 37 struct mctp_test_dev *dev; 38 struct net_device *ndev; 39 int rc; 40 41 ndev = alloc_netdev(sizeof(*dev), "mctptest%d", NET_NAME_ENUM, 42 mctp_test_dev_setup); 43 if (!ndev) 44 return NULL; 45 46 dev = netdev_priv(ndev); 47 dev->ndev = ndev; 48 49 rc = register_netdev(ndev); 50 if (rc) { 51 free_netdev(ndev); 52 return NULL; 53 } 54 55 rcu_read_lock(); 56 dev->mdev = __mctp_dev_get(ndev); 57 mctp_dev_hold(dev->mdev); 58 rcu_read_unlock(); 59 60 return dev; 61 } 62 63 void mctp_test_destroy_dev(struct mctp_test_dev *dev) 64 { 65 mctp_dev_put(dev->mdev); 66 unregister_netdev(dev->ndev); 67 } 68