Commit 7d474e06 authored by Andre Guedes's avatar Andre Guedes Committed by Marcel Holtmann

Bluetooth: Add le_auto_conn file on debugfs

This patch adds to debugfs the le_auto_conn file. This file will be
used to test LE auto connection infrastructure.

This file accept writes in the following format:
  "add <address> <address_type> [auto_connect]"
  "del <address> <address_type>"
  "clr"

The <address type> values are:
  * 0 for public address
  * 1 for random address

The [auto_connect] values are (for more details see struct hci_
conn_params):
  * 0 for disabled (default)
  * 1 for always
  * 2 for link loss

So for instance, if you want the kernel autonomously establishes
connections with device AA:BB:CC:DD:EE:FF (public address) every
time the device enters in connectable mode (starts advertising),
you should run the command:
$ echo "add AA:BB:CC:DD:EE:FF 0 1" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

To delete the connection parameters for that device, run the command:
$ echo "del AA:BB:CC:DD:EE:FF 0" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

To clear the connection parameters list, run the command:
$ echo "clr" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

Finally. to get the list of connection parameters configured in kernel,
read the le_auto_conn file:
$ cat /sys/kernel/debug/bluetooth/hci0/le_auto_conn

This file is created only if LE is enabled.
Signed-off-by: default avatarAndre Guedes <andre.guedes@openbossa.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 5b906a84
......@@ -896,6 +896,115 @@ static const struct file_operations lowpan_debugfs_fops = {
.llseek = default_llseek,
};
static int le_auto_conn_show(struct seq_file *sf, void *ptr)
{
struct hci_dev *hdev = sf->private;
struct hci_conn_params *p;
hci_dev_lock(hdev);
list_for_each_entry(p, &hdev->le_conn_params, list) {
seq_printf(sf, "%pMR %u %u\n", &p->addr, p->addr_type,
p->auto_connect);
}
hci_dev_unlock(hdev);
return 0;
}
static int le_auto_conn_open(struct inode *inode, struct file *file)
{
return single_open(file, le_auto_conn_show, inode->i_private);
}
static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
size_t count, loff_t *offset)
{
struct seq_file *sf = file->private_data;
struct hci_dev *hdev = sf->private;
u8 auto_connect = 0;
bdaddr_t addr;
u8 addr_type;
char *buf;
int err = 0;
int n;
/* Don't allow partial write */
if (*offset != 0)
return -EINVAL;
if (count < 3)
return -EINVAL;
buf = kzalloc(count, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, data, count)) {
err = -EFAULT;
goto done;
}
if (memcmp(buf, "add", 3) == 0) {
n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",
&addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
&addr.b[1], &addr.b[0], &addr_type,
&auto_connect);
if (n < 7) {
err = -EINVAL;
goto done;
}
hci_dev_lock(hdev);
err = hci_conn_params_add(hdev, &addr, addr_type, auto_connect,
hdev->le_conn_min_interval,
hdev->le_conn_max_interval);
hci_dev_unlock(hdev);
if (err)
goto done;
} else if (memcmp(buf, "del", 3) == 0) {
n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
&addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
&addr.b[1], &addr.b[0], &addr_type);
if (n < 7) {
err = -EINVAL;
goto done;
}
hci_dev_lock(hdev);
hci_conn_params_del(hdev, &addr, addr_type);
hci_dev_unlock(hdev);
} else if (memcmp(buf, "clr", 3) == 0) {
hci_dev_lock(hdev);
hci_conn_params_clear(hdev);
hci_pend_le_conns_clear(hdev);
hci_update_background_scan(hdev);
hci_dev_unlock(hdev);
} else {
err = -EINVAL;
}
done:
kfree(buf);
if (err)
return err;
else
return count;
}
static const struct file_operations le_auto_conn_fops = {
.open = le_auto_conn_open,
.read = seq_read,
.write = le_auto_conn_write,
.llseek = seq_lseek,
.release = single_release,
};
/* ---- HCI requests ---- */
static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
......@@ -1694,6 +1803,8 @@ static int __hci_init(struct hci_dev *hdev)
hdev, &adv_channel_map_fops);
debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
&lowpan_debugfs_fops);
debugfs_create_file("le_auto_conn", 0644, hdev->debugfs, hdev,
&le_auto_conn_fops);
}
return 0;
......
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