linux net中bluetooth 部分流程代码

subsys_initcall(bt_init);net，linux net中bluetooth 部分流程代码，主要是是bt部分的初始化

subsys_initcall(bt_init); net/bluetooth/af_bluetooth.c

• bt_init
  • sock_skb_cb_check_size(sizeof(struct bt_skb_cb));
  • err = bt_selftest();
    • return run_selftest(); net/bluetooth/selftest.c
      • err = test_ecdh(); ECDH一种加密算法
      • err = bt_selftest_smp(); 其他的算法加密，具体检查项展开比较复杂
  • bt_debugfs = debugfs_create_dir("bluetooth", NULL); 在/sys/kernel/debug下建立bluetooth 目录
  • err = bt_sysfs_init();
    • bt_class = class_create(THIS_MODULE, "bluetooth"); net/bluetooth/hci_sysfs.c
  • err = sock_register(&bt_sock_family_ops); net/sock.c
    • .create = bt_sock_create,
  • err = hci_sock_init();
    • err = proto_register(&hci_sk_proto, 0); net/bluetooth/hci_sock.c
    • err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
      • .create = hci_sock_create,
        • sock->ops = &hci_sock_ops;
          • .release = hci_sock_release,
          • .mmap = sock_no_mmap
          • .getname = hci_sock_getname,
          • .sendmsg = hci_sock_sendmsg,
          • .recvmsg = hci_sock_recvmsg,
          • .ioctl = hci_sock_ioctl,
          • .poll = datagram_poll,
          • .bind = hci_sock_bind,
          • .shutdown = sock_no_shutdown,
          • .setsockopt = hci_sock_setsockopt,
          • .getsockopt = hci_sock_getsockopt,
          • .connect = sock_no_connect,
          • .socketpair = sock_no_socketpair,
          • .accept = sock_no_accept,
          • .listen = sock_no_listen,
        • sock_init_data(sock, sk);
          • init_timer(&sk->sk_timer);
          • sock_set_flag(sk, SOCK_ZAPPED);
          • rwlock_init(&sk->sk_callback_lock);
          • lockdep_set_class_and_name(&sk->sk_callback_lock, af_callback_keys + sk->sk_family, af_family_clock_key_strings[sk->sk_family]);
          • sk->sk_state_change = sock_def_wakeup; net/core/sock.c
          • sk->sk_data_ready = sock_def_readable;
          • sk->sk_write_space = sock_def_write_space;
          • sk->sk_error_report = sock_def_error_report;
          • sk->sk_destruct = sock_def_destruct;
          • smp_wmb();
        • sock_reset_flag(sk, SOCK_ZAPPED);
        • bt_sock_link(&hci_sk_list, sk);
          • sk_add_node(sk, &l->head);
    • err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
  • err = l2cap_init();
    • err = l2cap_init_sockets(); net/bluetooth/l2cap_core.c
      • err = proto_register(&l2cap_proto, 0); net/bluetooth/i2cap_sock.c
      • err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
        • .create = l2cap_sock_create,
          • sock->ops = &l2cap_sock_ops;
            • .release = l2cap_sock_release,
            • .getsockopt = l2cap_sock_getsockopt
            • .connect = l2cap_sock_connect,
            • .listen = l2cap_sock_listen,
            • .accept = l2cap_sock_accept,
            • .getname = l2cap_sock_getname,
            • .sendmsg = l2cap_sock_sendmsg,
            • .bind = l2cap_sock_bind,
            • .poll = bt_sock_poll,
            • .ioctl = bt_sock_ioctl,
            • .mmap = sock_no_mmap,
            • .socketpair = sock_no_socketpair,
            • .shutdown = l2cap_sock_shutdown,
            • .setsockopt = l2cap_sock_setsockopt,
            • .recvmsg = l2cap_sock_recvmsg,
          • sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
            • sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern);
            • sock_init_data(sock, sk);
            • sock_reset_flag(sk, SOCK_ZAPPED);
            • chan = l2cap_chan_create();
            • l2cap_chan_hold(chan);
            • l2cap_pi(sk)->chan = chan;
          • l2cap_sock_init(sk, NULL);
          • bt_sock_link(&l2cap_sk_list, sk);
            • sk_add_node(sk, &l->head);
      • err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, NULL);
    • hci_register_cb(&l2cap_cb);
      • .connect_cfm = l2cap_connect_cfm,
      • .disconn_cfm = l2cap_disconn_cfm,
      • .security_cfm = l2cap_security_cfm,
    • l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs, NULL, &l2cap_debugfs_fops);
  • err = sco_init();
    • err = proto_register(&sco_proto, 0); net/bluetooth/sco.c
    • err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
      • .create = sco_sock_create,
        • sock->ops = &sco_sock_ops;
          • .release = sco_sock_release,
          • .getsockopt = sco_sock_getsockopt
          • .connect = sco_sock_connect,
          • .listen = sco_sock_listen,
          • .accept = sco_sock_accept,
          • .getname = sco_sock_getname,
          • .sendmsg = sco_sock_sendmsg,
          • .bind = sco_sock_bind,
          • .poll = bt_sock_poll,
          • .ioctl = bt_sock_ioctl,
          • .mmap = sock_no_mmap,
          • .socketpair = sock_no_socketpair,
          • .shutdown = sco_sock_shutdown,
          • .setsockopt = sco_sock_setsockopt,
          • .recvmsg = sco_sock_recvmsg,
        • sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
          • sock_init_data(sock, sk);
          • sock_reset_flag(sk, SOCK_ZAPPED);
          • setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
          • bt_sock_link(&sco_sk_list, sk);
            • sk_add_node(sk, &l->head);
        • sco_sock_init(sk, NULL);
          • security_sk_clone(parent, sk);
    • err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
    • hci_register_cb(&sco_cb);
      • .connect_cfm = sco_connect_cfm,
      • .disconn_cfm = sco_disconn_cfm,
    • sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, NULL, &sco_debugfs_fops);
  • err = mgmt_init();
    • return hci_mgmt_chan_register(&chan); net/bluetooth/mgmt.c
      • .handlers = mgmt_handlers, 注册mgmt相关操作句柄
      • .hdev_init = mgmt_init_hdev,
        • hci_dev_test_and_set_flag(hdev, HCI_MGMT)
        • INIT_DELAYED_WORK(&hdev->service_cache, service_cache_off);
          • hci_req_init(&req, hdev);
          • hci_dev_lock(hdev);
          • update_eir(&req);
          • update_class(&req);
          • hci_dev_unlock(hdev);
          • hci_req_run(&req, NULL);
        • INIT_DELAYED_WORK(&hdev->rpa_expired, rpa_expired);
          • hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
          • hci_req_init(&req, hdev);
          • enable_advertising(&req);
            • hci_dev_clear_flag(hdev, HCI_LE_ADV);
            • instance = get_current_adv_instance(hdev);
            • flags = get_adv_instance_flags(hdev, instance);
          • hci_req_run(&req, NULL);
        • hci_dev_clear_flag(hdev, HCI_BONDABLE);