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/mctp.h> 8 #include <net/mctpdevice.h> 9 #include <net/pkt_sched.h> 10 11 #include "utils.h" 12 13 static netdev_tx_t mctp_test_dev_tx(struct sk_buff *skb, 14 struct net_device *ndev) 15 { 16 kfree_skb(skb); 17 return NETDEV_TX_OK; 18 } 19 20 static const struct net_device_ops mctp_test_netdev_ops = { 21 .ndo_start_xmit = mctp_test_dev_tx, 22 }; 23 24 static void mctp_test_dev_setup(struct net_device *ndev) 25 { 26 ndev->type = ARPHRD_MCTP; 27 ndev->mtu = MCTP_DEV_TEST_MTU; 28 ndev->hard_header_len = 0; 29 ndev->addr_len = 0; 30 ndev->tx_queue_len = DEFAULT_TX_QUEUE_LEN; 31 ndev->flags = IFF_NOARP; 32 ndev->netdev_ops = &mctp_test_netdev_ops; 33 ndev->needs_free_netdev = true; 34 } 35 36 struct mctp_test_dev *mctp_test_create_dev(void) 37 { 38 struct mctp_test_dev *dev; 39 struct net_device *ndev; 40 int rc; 41 42 ndev = alloc_netdev(sizeof(*dev), "mctptest%d", NET_NAME_ENUM, 43 mctp_test_dev_setup); 44 if (!ndev) 45 return NULL; 46 47 dev = netdev_priv(ndev); 48 dev->ndev = ndev; 49 50 rc = register_netdev(ndev); 51 if (rc) { 52 free_netdev(ndev); 53 return NULL; 54 } 55 56 rcu_read_lock(); 57 dev->mdev = __mctp_dev_get(ndev); 58 dev->mdev->net = mctp_default_net(dev_net(ndev)); 59 rcu_read_unlock(); 60 61 return dev; 62 } 63 64 void mctp_test_destroy_dev(struct mctp_test_dev *dev) 65 { 66 mctp_dev_put(dev->mdev); 67 unregister_netdev(dev->ndev); 68 } 69