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5206 /* 5207 * Initialize the DEV module. At boot time this walks the device list and 5208 * unhooks any devices that fail to initialise (normally hardware not 5209 * present) and leaves us with a valid list of present and active devices. 5210 * 5211 */ 5212 5213 /* 5214 * This is called single threaded during boot, so no need 5215 * to take the rtnl semaphore. 5216 */ 5217 static int __init net_dev_init(void) 5218 { 5219 int i, rc = -ENOMEM; 5220 5221 BUG_ON(!dev_boot_phase); 5222 5223 if (dev_proc_init()) 5224 goto out; 5225 5226 if (netdev_kobject_init()) 5227 goto out; 5228 5229 INIT_LIST_HEAD(&ptype_all); 5230 for (i = 0; i < PTYPE_HASH_SIZE; i++) 5231 INIT_LIST_HEAD(&ptype_base[i]); 5232 5233 if (register_pernet_subsys(&netdev_net_ops)) 5234 goto out; 5235 5236 /* 5237 * Initialise the packet receive queues. 5238 */ 5239 5240 for_each_possible_cpu(i) { 5241 struct softnet_data *queue; 5242 5243 queue = &per_cpu(softnet_data, i); 5244 skb_queue_head_init(&queue->input_pkt_queue); 5245 queue->completion_queue = NULL; 5246 INIT_LIST_HEAD(&queue->poll_list); 5247 5248 queue->backlog.poll = process_backlog; 5249 queue->backlog.weight = weight_p; 5250 queue->backlog.gro_list = NULL; 5251 queue->backlog.gro_count = 0; 5252 } 5253 5254 dev_boot_phase = 0; 5255 5256 /* The loopback device is special if any other network devices 5257 * is present in a network namespace the loopback device must 5258 * be present. Since we now dynamically allocate and free the 5259 * loopback device ensure this invariant is maintained by 5260 * keeping the loopback device as the first device on the 5261 * list of network devices. Ensuring the loopback devices 5262 * is the first device that appears and the last network device 5263 * that disappears. 5264 */ 5265 if (register_pernet_device(&loopback_net_ops)) 5266 goto out; 5267 5268 if (register_pernet_device(&default_device_ops)) 5269 goto out; 5270 5271 open_softirq(NET_TX_SOFTIRQ, net_tx_action); 5272 open_softirq(NET_RX_SOFTIRQ, net_rx_action); 5273 5274 hotcpu_notifier(dev_cpu_callback, 0); 5275 dst_init(); 5276 dev_mcast_init(); 5277 rc = 0; 5278 out: 5279 return rc; 5280 } 5281 5282 subsys_initcall(net_dev_init); 5283 5284 static int __init initialize_hashrnd(void) 5285 { 5286 get_random_bytes(&skb_tx_hashrnd, sizeof(skb_tx_hashrnd)); 5287 return 0; 5288 } 5289 5290 late_initcall_sync(initialize_hashrnd); |
