From 858cdc78be8be19b7176cafe06d3db3acfb345d4 Mon Sep 17 00:00:00 2001 From: Johan Hedberg Date: Thu, 16 Oct 2014 10:45:31 +0200 Subject: [PATCH] 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 Signed-off-by: Marcel Holtmann --- include/net/bluetooth/hci.h | 1 + net/bluetooth/hci_core.c | 47 +++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index e56f9099f8e3..569c077778b6 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -163,6 +163,7 @@ enum { enum { HCI_DUT_MODE, HCI_FORCE_SC, + HCI_FORCE_LESC, HCI_FORCE_STATIC_ADDR, }; diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 2fa9f2b2bee3..581e13e9dc32 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -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)) { -- 2.20.1