cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hci_sysfs.c (2310B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Bluetooth HCI driver model support. */
      3
      4#include <linux/module.h>
      5
      6#include <net/bluetooth/bluetooth.h>
      7#include <net/bluetooth/hci_core.h>
      8
      9static struct class *bt_class;
     10
     11static void bt_link_release(struct device *dev)
     12{
     13	struct hci_conn *conn = to_hci_conn(dev);
     14	kfree(conn);
     15}
     16
     17static const struct device_type bt_link = {
     18	.name    = "link",
     19	.release = bt_link_release,
     20};
     21
     22/*
     23 * The rfcomm tty device will possibly retain even when conn
     24 * is down, and sysfs doesn't support move zombie device,
     25 * so we should move the device before conn device is destroyed.
     26 */
     27static int __match_tty(struct device *dev, void *data)
     28{
     29	return !strncmp(dev_name(dev), "rfcomm", 6);
     30}
     31
     32void hci_conn_init_sysfs(struct hci_conn *conn)
     33{
     34	struct hci_dev *hdev = conn->hdev;
     35
     36	BT_DBG("conn %p", conn);
     37
     38	conn->dev.type = &bt_link;
     39	conn->dev.class = bt_class;
     40	conn->dev.parent = &hdev->dev;
     41
     42	device_initialize(&conn->dev);
     43}
     44
     45void hci_conn_add_sysfs(struct hci_conn *conn)
     46{
     47	struct hci_dev *hdev = conn->hdev;
     48
     49	BT_DBG("conn %p", conn);
     50
     51	dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
     52
     53	if (device_add(&conn->dev) < 0) {
     54		bt_dev_err(hdev, "failed to register connection device");
     55		return;
     56	}
     57
     58	hci_dev_hold(hdev);
     59}
     60
     61void hci_conn_del_sysfs(struct hci_conn *conn)
     62{
     63	struct hci_dev *hdev = conn->hdev;
     64
     65	if (!device_is_registered(&conn->dev))
     66		return;
     67
     68	while (1) {
     69		struct device *dev;
     70
     71		dev = device_find_child(&conn->dev, NULL, __match_tty);
     72		if (!dev)
     73			break;
     74		device_move(dev, NULL, DPM_ORDER_DEV_LAST);
     75		put_device(dev);
     76	}
     77
     78	device_del(&conn->dev);
     79
     80	hci_dev_put(hdev);
     81}
     82
     83static void bt_host_release(struct device *dev)
     84{
     85	struct hci_dev *hdev = to_hci_dev(dev);
     86
     87	if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
     88		hci_release_dev(hdev);
     89	else
     90		kfree(hdev);
     91	module_put(THIS_MODULE);
     92}
     93
     94static const struct device_type bt_host = {
     95	.name    = "host",
     96	.release = bt_host_release,
     97};
     98
     99void hci_init_sysfs(struct hci_dev *hdev)
    100{
    101	struct device *dev = &hdev->dev;
    102
    103	dev->type = &bt_host;
    104	dev->class = bt_class;
    105
    106	__module_get(THIS_MODULE);
    107	device_initialize(dev);
    108}
    109
    110int __init bt_sysfs_init(void)
    111{
    112	bt_class = class_create(THIS_MODULE, "bluetooth");
    113
    114	return PTR_ERR_OR_ZERO(bt_class);
    115}
    116
    117void bt_sysfs_cleanup(void)
    118{
    119	class_destroy(bt_class);
    120}