/* Bluetooth HCI driver model support. */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/module.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> static struct class *bt_class; struct dentry *bt_debugfs; EXPORT_SYMBOL_GPL(bt_debugfs); static inline char *link_typetostr(int type) { switch (type) { case ACL_LINK: return "ACL"; case SCO_LINK: return "SCO"; case ESCO_LINK: return "eSCO"; case LE_LINK: return "LE"; default: return "UNKNOWN"; } } static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); return sprintf(buf, "%s\n", link_typetostr(conn->type)); } static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); return sprintf(buf, "%s\n", batostr(&conn->dst)); } static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", conn->features[0], conn->features[1], conn->features[2], conn->features[3], conn->features[4], conn->features[5], conn->features[6], conn->features[7]); } #define LINK_ATTR(_name, _mode, _show, _store) \ struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store) static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); static struct attribute *bt_link_attrs[] = { &link_attr_type.attr, &link_attr_address.attr, &link_attr_features.attr, NULL }; static struct attribute_group bt_link_group = { .attrs = bt_link_attrs, }; static const struct attribute_group *bt_link_groups[] = { &bt_link_group, NULL }; static void bt_link_release(struct device *dev) { void *data = dev_get_drvdata(dev); kfree(data); } static struct device_type bt_link = { .name = "link", .groups = bt_link_groups, .release = bt_link_release, }; /* * The rfcomm tty device will possibly retain even when conn * is down, and sysfs doesn't support move zombie device, * so we should move the device before conn device is destroyed. */ static int __match_tty(struct device *dev, void *data) { return !strncmp(dev_name(dev), "rfcomm", 6); } void hci_conn_init_sysfs(struct hci_conn *conn) { struct hci_dev *hdev = conn->hdev; BT_DBG("conn %p", conn); conn->dev.type = &bt_link; conn->dev.class = bt_class; conn->dev.parent = &hdev->dev; device_initialize(&conn->dev); } void hci_conn_add_sysfs(struct hci_conn *conn) { struct hci_dev *hdev = conn->hdev; BT_DBG("conn %p", conn); dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); dev_set_drvdata(&conn->dev, conn); if (device_add(&conn->dev) < 0) { BT_ERR("Failed to register connection device"); return; } hci_dev_hold(hdev); } void hci_conn_del_sysfs(struct hci_conn *conn) { struct hci_dev *hdev = conn->hdev; if (!device_is_registered(&conn->dev)) return; while (1) { struct device *dev; dev = device_find_child(&conn->dev, NULL, __match_tty); if (!dev) break; device_move(dev, NULL, DPM_ORDER_DEV_LAST); put_device(dev); } device_del(&conn->dev); put_device(&conn->dev); hci_dev_put(hdev); } static inline char *host_bustostr(int bus) { switch (bus) { case HCI_VIRTUAL: return "VIRTUAL"; case HCI_USB: return "USB"; case HCI_PCCARD: return "PCCARD"; case HCI_UART: return "UART"; case HCI_RS232: return "RS232"; case HCI_PCI: return "PCI"; case HCI_SDIO: return "SDIO"; default: return "UNKNOWN"; } } static inline char *host_typetostr(int type) { switch (type) { case HCI_BREDR: return "BR/EDR"; case HCI_AMP: return "AMP"; default: return "UNKNOWN"; } } static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); } static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); } static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); char name[HCI_MAX_NAME_LENGTH + 1]; int i; for (i = 0; i < HCI_MAX_NAME_LENGTH; i++) name[i] = hdev->dev_name[i]; name[HCI_MAX_NAME_LENGTH] = '\0'; return sprintf(buf, "%s\n", name); } static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); } static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); } static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", hdev->features[0], hdev->features[1], hdev->features[2], hdev->features[3], hdev->features[4], hdev->features[5], hdev->features[6], hdev->features[7]); } static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->manufacturer); } static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->hci_ver); } static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->hci_rev); } static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->idle_timeout); } static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); unsigned int val; int rv; rv = kstrtouint(buf, 0, &val); if (rv < 0) return rv; if (val != 0 && (val < 500 || val > 3600000)) return -EINVAL; hdev->idle_timeout = val; return count; } static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->sniff_max_interval); } static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); u16 val; int rv; rv = kstrtou16(buf, 0, &val); if (rv < 0) return rv; if (val == 0 || val % 2 || val < hdev->sniff_min_interval) return -EINVAL; hdev->sniff_max_interval = val; return count; } static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->sniff_min_interval); } static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); u16 val; int rv; rv = kstrtou16(buf, 0, &val); if (rv < 0) return rv; if (val == 0 || val % 2 || val > hdev->sniff_max_interval) return -EINVAL; hdev->sniff_min_interval = val; return count; } static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, show_idle_timeout, store_idle_timeout); static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, show_sniff_max_interval, store_sniff_max_interval); static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, show_sniff_min_interval, store_sniff_min_interval); static struct attribute *bt_host_attrs[] = { &dev_attr_bus.attr, &dev_attr_type.attr, &dev_attr_name.attr, &dev_attr_class.attr, &dev_attr_address.attr, &dev_attr_features.attr, &dev_attr_manufacturer.attr, &dev_attr_hci_version.attr, &dev_attr_hci_revision.attr, &dev_attr_idle_timeout.attr, &dev_attr_sniff_max_interval.attr, &dev_attr_sniff_min_interval.attr, NULL }; static struct attribute_group bt_host_group = { .attrs = bt_host_attrs, }; static const struct attribute_group *bt_host_groups[] = { &bt_host_group, NULL }; static void bt_host_release(struct device *dev) { void *data = dev_get_drvdata(dev); kfree(data); } static struct device_type bt_host = { .name = "host", .groups = bt_host_groups, .release = bt_host_release, }; static int inquiry_cache_show(struct seq_file *f, void *p) { struct hci_dev *hdev = f->private; struct inquiry_cache *cache = &hdev->inq_cache; struct inquiry_entry *e; hci_dev_lock(hdev); for (e = cache->list; e; e = e->next) { struct inquiry_data *data = &e->data; seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", batostr(&data->bdaddr), data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode, data->dev_class[2], data->dev_class[1], data->dev_class[0], __le16_to_cpu(data->clock_offset), data->rssi, data->ssp_mode, e->timestamp); } hci_dev_unlock(hdev); return 0; } static int inquiry_cache_open(struct inode *inode, struct file *file) { return single_open(file, inquiry_cache_show, inode->i_private); } static const struct file_operations inquiry_cache_fops = { .open = inquiry_cache_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int blacklist_show(struct seq_file *f, void *p) { struct hci_dev *hdev = f->private; struct bdaddr_list *b; hci_dev_lock(hdev); list_for_each_entry(b, &hdev->blacklist, list) seq_printf(f, "%s\n", batostr(&b->bdaddr)); hci_dev_unlock(hdev); return 0; } static int blacklist_open(struct inode *inode, struct file *file) { return single_open(file, blacklist_show, inode->i_private); } static const struct file_operations blacklist_fops = { .open = blacklist_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void print_bt_uuid(struct seq_file *f, u8 *uuid) { u32 data0, data4; u16 data1, data2, data3, data5; memcpy(&data0, &uuid[0], 4); memcpy(&data1, &uuid[4], 2); memcpy(&data2, &uuid[6], 2); memcpy(&data3, &uuid[8], 2); memcpy(&data4, &uuid[10], 4); memcpy(&data5, &uuid[14], 2); seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n", ntohl(data0), ntohs(data1), ntohs(data2), ntohs(data3), ntohl(data4), ntohs(data5)); } static int uuids_show(struct seq_file *f, void *p) { struct hci_dev *hdev = f->private; struct bt_uuid *uuid; hci_dev_lock(hdev); list_for_each_entry(uuid, &hdev->uuids, list) print_bt_uuid(f, uuid->uuid); hci_dev_unlock(hdev); return 0; } static int uuids_open(struct inode *inode, struct file *file) { return single_open(file, uuids_show, inode->i_private); } static const struct file_operations uuids_fops = { .open = uuids_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int auto_accept_delay_set(void *data, u64 val) { struct hci_dev *hdev = data; hci_dev_lock(hdev); hdev->auto_accept_delay = val; hci_dev_unlock(hdev); return 0; } static int auto_accept_delay_get(void *data, u64 *val) { struct hci_dev *hdev = data; hci_dev_lock(hdev); *val = hdev->auto_accept_delay; hci_dev_unlock(hdev); return 0; } DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get, auto_accept_delay_set, "%llu\n"); void hci_init_sysfs(struct hci_dev *hdev) { struct device *dev = &hdev->dev; dev->type = &bt_host; dev->class = bt_class; dev_set_drvdata(dev, hdev); device_initialize(dev); } int hci_add_sysfs(struct hci_dev *hdev) { struct device *dev = &hdev->dev; int err; BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); dev->parent = hdev->parent; dev_set_name(dev, "%s", hdev->name); err = device_add(dev); if (err < 0) return err; if (!bt_debugfs) return 0; hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); if (!hdev->debugfs) return 0; debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, hdev, &inquiry_cache_fops); debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev, &blacklist_fops); debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops); debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev, &auto_accept_delay_fops); return 0; } void hci_del_sysfs(struct hci_dev *hdev) { BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); debugfs_remove_recursive(hdev->debugfs); device_del(&hdev->dev); } int __init bt_sysfs_init(void) { bt_debugfs = debugfs_create_dir("bluetooth", NULL); bt_class = class_create(THIS_MODULE, "bluetooth"); if (IS_ERR(bt_class)) return PTR_ERR(bt_class); return 0; } void bt_sysfs_cleanup(void) { class_destroy(bt_class); debugfs_remove_recursive(bt_debugfs); }