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Bluetooth: Add debugfs switch for forcing SMP over BR/EDR 

To make it possible to use LE SC functionality over BR/EDR with pre-4.1
controllers (that do not support BR/EDR SC links) it's useful to be able
to force LE SC operations even over a traditional SSP protected link.
This patch adds a debugfs switch to force a special debug flag which is
used to skip the checks for BR/EDR SC support.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-10-16 10:45:31 +02:00 committed by Marcel Holtmann
parent fe8bc5ac67
commit 858cdc78be
2 changed files with 48 additions and 0 deletions
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1
include/net/bluetooth/hci.h
View File

@ -163,6 +163,7 @@ enum {
enum {
HCI_DUT_MODE,
HCI_FORCE_SC,
HCI_FORCE_LESC,
HCI_FORCE_STATIC_ADDR,
};

47
net/bluetooth/hci_core.c
View File

@ -406,6 +406,49 @@ static const struct file_operations force_sc_support_fops = {
.llseek = default_llseek,
};
static ssize_t force_lesc_support_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct hci_dev *hdev = file->private_data;
char buf[3];
buf[0] = test_bit(HCI_FORCE_LESC, &hdev->dbg_flags) ? 'Y': 'N';
buf[1] = '\n';
buf[2] = '\0';
return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}
static ssize_t force_lesc_support_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct hci_dev *hdev = file->private_data;
char buf[32];
size_t buf_size = min(count, (sizeof(buf)-1));
bool enable;
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = '\0';
if (strtobool(buf, &enable))
return -EINVAL;
if (enable == test_bit(HCI_FORCE_LESC, &hdev->dbg_flags))
return -EALREADY;
change_bit(HCI_FORCE_LESC, &hdev->dbg_flags);
return count;
}
static const struct file_operations force_lesc_support_fops = {
.open = simple_open,
.read = force_lesc_support_read,
.write = force_lesc_support_write,
.llseek = default_llseek,
};
static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
@ -1817,6 +1860,10 @@ static int __hci_init(struct hci_dev *hdev)
hdev, &force_sc_support_fops);
debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
hdev, &sc_only_mode_fops);
if (lmp_le_capable(hdev))
debugfs_create_file("force_lesc_support", 0644,
hdev->debugfs, hdev,
&force_lesc_support_fops);
}
if (lmp_sniff_capable(hdev)) {