@@ -134,6 +134,8 @@ struct hci_dev {
atomic_t promisc;
+ struct dentry *debugfs;
+
struct device *parent;
struct device dev;
@@ -2,6 +2,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/debugfs.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -9,6 +10,9 @@
struct class *bt_class = NULL;
EXPORT_SYMBOL_GPL(bt_class);
+struct dentry *bt_debugfs = NULL;
+EXPORT_SYMBOL_GPL(bt_debugfs);
+
static struct workqueue_struct *bt_workq;
static inline char *link_typetostr(int type)
@@ -251,32 +255,6 @@ static ssize_t show_hci_revision(struct device *dev, struct device_attribute *at
return sprintf(buf, "%d\n", hdev->hci_rev);
}
-static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct hci_dev *hdev = dev_get_drvdata(dev);
- struct inquiry_cache *cache = &hdev->inq_cache;
- struct inquiry_entry *e;
- int n = 0;
-
- hci_dev_lock_bh(hdev);
-
- for (e = cache->list; e; e = e->next) {
- struct inquiry_data *data = &e->data;
- bdaddr_t bdaddr;
- baswap(&bdaddr, &data->bdaddr);
- n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
- batostr(&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_bh(hdev);
- return n;
-}
-
static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
{
struct hci_dev *hdev = dev_get_drvdata(dev);
@@ -363,7 +341,6 @@ 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(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
show_idle_timeout, store_idle_timeout);
@@ -381,7 +358,6 @@ static struct attribute *bt_host_attrs[] = {
&dev_attr_manufacturer.attr,
&dev_attr_hci_version.attr,
&dev_attr_hci_revision.attr,
- &dev_attr_inquiry_cache.attr,
&dev_attr_idle_timeout.attr,
&dev_attr_sniff_max_interval.attr,
&dev_attr_sniff_min_interval.attr,
@@ -409,6 +385,46 @@ static struct device_type bt_host = {
.release = bt_host_release,
};
+static int inquiry_cache_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t inquiry_cache_read(struct file *file, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct hci_dev *hdev = file->private_data;
+ struct inquiry_cache *cache = &hdev->inq_cache;
+ struct inquiry_entry *e;
+ char buf[4096];
+ int n = 0;
+
+ hci_dev_lock_bh(hdev);
+
+ for (e = cache->list; e; e = e->next) {
+ struct inquiry_data *data = &e->data;
+ bdaddr_t bdaddr;
+ baswap(&bdaddr, &data->bdaddr);
+ n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
+ batostr(&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_bh(hdev);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, n);
+}
+
+static const struct file_operations inquiry_cache_fops = {
+ .open = inquiry_cache_open,
+ .read = inquiry_cache_read,
+};
+
int hci_register_sysfs(struct hci_dev *hdev)
{
struct device *dev = &hdev->dev;
@@ -428,6 +444,16 @@ int hci_register_sysfs(struct hci_dev *hdev)
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);
+
return 0;
}
@@ -435,6 +461,8 @@ void hci_unregister_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);
}
@@ -444,6 +472,8 @@ int __init bt_sysfs_init(void)
if (!bt_workq)
return -ENOMEM;
+ bt_debugfs = debugfs_create_dir("bluetooth", NULL);
+
bt_class = class_create(THIS_MODULE, "bluetooth");
if (IS_ERR(bt_class)) {
destroy_workqueue(bt_workq);
@@ -455,7 +485,9 @@ int __init bt_sysfs_init(void)
void bt_sysfs_cleanup(void)
{
- destroy_workqueue(bt_workq);
-
class_destroy(bt_class);
+
+ debugfs_remove_recursive(bt_debugfs);
+
+ destroy_workqueue(bt_workq);
}
The output of the inquiry cache is only useful for debugging purposes and so move it into debugfs. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> --- include/net/bluetooth/hci_core.h | 2 + net/bluetooth/hci_sysfs.c | 92 +++++++++++++++++++++++++------------ 2 files changed, 64 insertions(+), 30 deletions(-)