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Commit 858cdc78 authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
Browse files

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: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent fe8bc5ac

include/net/bluetooth/hci.h

+1 −0
Original line number Diff line number Diff line
@@ -163,6 +163,7 @@ enum { 
enum {

	HCI_DUT_MODE,

	HCI_FORCE_SC,

	HCI_FORCE_LESC,

	HCI_FORCE_STATIC_ADDR,

};

net/bluetooth/hci_core.c

+47 −0
Original line number Diff line number Diff line
@@ -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)) {