forked from Minki/linux
aef7d97cc6
Some of the debug files ended up wrongly in sysfs, because at that point of time, debugfs didn't exist. Convert these files to use debugfs and also seq_file. This patch converts all of these files at once and then removes the exported symbol for the Bluetooth sysfs class. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
512 lines
12 KiB
C
512 lines
12 KiB
C
/* Bluetooth HCI driver model support. */
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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static struct class *bt_class;
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struct dentry *bt_debugfs = NULL;
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EXPORT_SYMBOL_GPL(bt_debugfs);
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static struct workqueue_struct *bt_workq;
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static inline char *link_typetostr(int type)
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{
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switch (type) {
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case ACL_LINK:
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return "ACL";
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case SCO_LINK:
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return "SCO";
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case ESCO_LINK:
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return "eSCO";
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default:
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return "UNKNOWN";
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}
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}
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static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", link_typetostr(conn->type));
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}
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static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &conn->dst);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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conn->features[0], conn->features[1],
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conn->features[2], conn->features[3],
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conn->features[4], conn->features[5],
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conn->features[6], conn->features[7]);
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}
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#define LINK_ATTR(_name,_mode,_show,_store) \
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struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
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static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
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static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
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static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
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static struct attribute *bt_link_attrs[] = {
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&link_attr_type.attr,
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&link_attr_address.attr,
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&link_attr_features.attr,
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NULL
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};
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static struct attribute_group bt_link_group = {
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.attrs = bt_link_attrs,
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};
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static const struct attribute_group *bt_link_groups[] = {
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&bt_link_group,
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NULL
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};
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static void bt_link_release(struct device *dev)
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{
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void *data = dev_get_drvdata(dev);
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kfree(data);
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}
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static struct device_type bt_link = {
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.name = "link",
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.groups = bt_link_groups,
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.release = bt_link_release,
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};
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static void add_conn(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
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struct hci_dev *hdev = conn->hdev;
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dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
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dev_set_drvdata(&conn->dev, conn);
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if (device_add(&conn->dev) < 0) {
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BT_ERR("Failed to register connection device");
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return;
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}
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hci_dev_hold(hdev);
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}
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/*
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* The rfcomm tty device will possibly retain even when conn
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* is down, and sysfs doesn't support move zombie device,
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* so we should move the device before conn device is destroyed.
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*/
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static int __match_tty(struct device *dev, void *data)
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{
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return !strncmp(dev_name(dev), "rfcomm", 6);
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}
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static void del_conn(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
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struct hci_dev *hdev = conn->hdev;
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if (!device_is_registered(&conn->dev))
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return;
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while (1) {
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struct device *dev;
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dev = device_find_child(&conn->dev, NULL, __match_tty);
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if (!dev)
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break;
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device_move(dev, NULL, DPM_ORDER_DEV_LAST);
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put_device(dev);
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}
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device_del(&conn->dev);
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put_device(&conn->dev);
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hci_dev_put(hdev);
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}
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void hci_conn_init_sysfs(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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BT_DBG("conn %p", conn);
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conn->dev.type = &bt_link;
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conn->dev.class = bt_class;
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conn->dev.parent = &hdev->dev;
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device_initialize(&conn->dev);
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INIT_WORK(&conn->work_add, add_conn);
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INIT_WORK(&conn->work_del, del_conn);
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}
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void hci_conn_add_sysfs(struct hci_conn *conn)
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{
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BT_DBG("conn %p", conn);
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queue_work(bt_workq, &conn->work_add);
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}
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void hci_conn_del_sysfs(struct hci_conn *conn)
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{
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BT_DBG("conn %p", conn);
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queue_work(bt_workq, &conn->work_del);
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}
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static inline char *host_bustostr(int bus)
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{
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switch (bus) {
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case HCI_VIRTUAL:
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return "VIRTUAL";
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case HCI_USB:
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return "USB";
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case HCI_PCCARD:
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return "PCCARD";
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case HCI_UART:
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return "UART";
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case HCI_RS232:
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return "RS232";
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case HCI_PCI:
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return "PCI";
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case HCI_SDIO:
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return "SDIO";
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default:
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return "UNKNOWN";
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}
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}
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static inline char *host_typetostr(int type)
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{
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switch (type) {
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case HCI_BREDR:
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return "BR/EDR";
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case HCI_80211:
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return "802.11";
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default:
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return "UNKNOWN";
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}
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}
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static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
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}
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static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
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}
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static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char name[249];
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int i;
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for (i = 0; i < 248; i++)
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name[i] = hdev->dev_name[i];
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name[248] = '\0';
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return sprintf(buf, "%s\n", name);
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}
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static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%.2x%.2x%.2x\n",
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hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
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}
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static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &hdev->bdaddr);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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hdev->features[0], hdev->features[1],
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hdev->features[2], hdev->features[3],
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hdev->features[4], hdev->features[5],
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hdev->features[6], hdev->features[7]);
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}
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static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->manufacturer);
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}
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static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_ver);
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}
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static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_rev);
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}
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static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->idle_timeout);
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}
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static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u32 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val != 0 && (val < 500 || val > 3600000))
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return -EINVAL;
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hdev->idle_timeout = val;
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return count;
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}
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static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_max_interval);
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}
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static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val < hdev->sniff_min_interval)
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return -EINVAL;
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hdev->sniff_max_interval = val;
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return count;
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}
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static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_min_interval);
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}
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static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val > hdev->sniff_max_interval)
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return -EINVAL;
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hdev->sniff_min_interval = val;
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return count;
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}
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static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
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static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
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static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
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static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
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static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
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static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
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static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
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static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
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static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
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show_idle_timeout, store_idle_timeout);
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static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
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show_sniff_max_interval, store_sniff_max_interval);
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static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
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show_sniff_min_interval, store_sniff_min_interval);
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static struct attribute *bt_host_attrs[] = {
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&dev_attr_bus.attr,
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&dev_attr_type.attr,
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&dev_attr_name.attr,
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&dev_attr_class.attr,
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&dev_attr_address.attr,
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&dev_attr_features.attr,
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&dev_attr_manufacturer.attr,
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&dev_attr_hci_version.attr,
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&dev_attr_hci_revision.attr,
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&dev_attr_idle_timeout.attr,
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&dev_attr_sniff_max_interval.attr,
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&dev_attr_sniff_min_interval.attr,
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NULL
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};
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static struct attribute_group bt_host_group = {
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.attrs = bt_host_attrs,
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};
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static const struct attribute_group *bt_host_groups[] = {
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&bt_host_group,
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NULL
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};
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static void bt_host_release(struct device *dev)
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{
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void *data = dev_get_drvdata(dev);
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kfree(data);
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}
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static struct device_type bt_host = {
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.name = "host",
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.groups = bt_host_groups,
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.release = bt_host_release,
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};
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static int inquiry_cache_show(struct seq_file *f, void *p)
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{
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struct hci_dev *hdev = f->private;
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struct inquiry_cache *cache = &hdev->inq_cache;
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struct inquiry_entry *e;
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hci_dev_lock_bh(hdev);
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for (e = cache->list; e; e = e->next) {
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struct inquiry_data *data = &e->data;
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bdaddr_t bdaddr;
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baswap(&bdaddr, &data->bdaddr);
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seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
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batostr(&bdaddr),
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data->pscan_rep_mode, data->pscan_period_mode,
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data->pscan_mode, data->dev_class[2],
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data->dev_class[1], data->dev_class[0],
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__le16_to_cpu(data->clock_offset),
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data->rssi, data->ssp_mode, e->timestamp);
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}
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hci_dev_unlock_bh(hdev);
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return 0;
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}
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static int inquiry_cache_open(struct inode *inode, struct file *file)
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{
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return single_open(file, inquiry_cache_show, inode->i_private);
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}
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static const struct file_operations inquiry_cache_fops = {
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.open = inquiry_cache_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int hci_register_sysfs(struct hci_dev *hdev)
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{
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struct device *dev = &hdev->dev;
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int err;
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BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
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dev->type = &bt_host;
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dev->class = bt_class;
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dev->parent = hdev->parent;
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dev_set_name(dev, "%s", hdev->name);
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dev_set_drvdata(dev, hdev);
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err = device_register(dev);
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if (err < 0)
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return err;
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if (!bt_debugfs)
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return 0;
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hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
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if (!hdev->debugfs)
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return 0;
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debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
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hdev, &inquiry_cache_fops);
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return 0;
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}
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void hci_unregister_sysfs(struct hci_dev *hdev)
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{
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BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
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debugfs_remove_recursive(hdev->debugfs);
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device_del(&hdev->dev);
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}
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int __init bt_sysfs_init(void)
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{
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bt_workq = create_singlethread_workqueue("bluetooth");
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if (!bt_workq)
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return -ENOMEM;
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bt_debugfs = debugfs_create_dir("bluetooth", NULL);
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bt_class = class_create(THIS_MODULE, "bluetooth");
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if (IS_ERR(bt_class)) {
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destroy_workqueue(bt_workq);
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return PTR_ERR(bt_class);
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}
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return 0;
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}
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void bt_sysfs_cleanup(void)
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{
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class_destroy(bt_class);
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debugfs_remove_recursive(bt_debugfs);
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destroy_workqueue(bt_workq);
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}
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