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Bluetooth: Add toggle to switch off interleave scan 

This patch add a configurable parameter to switch off the interleave
scan feature.

Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Howard Chung 2020-11-26 12:22:25 +08:00 committed by Johan Hedberg
parent 3bc615fa93
commit 80af16a3e4
4 changed files with 37 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/bluetooth/hci_core.h
View File

@ -363,6 +363,7 @@ struct hci_dev {
__u32 clock;
__u16 advmon_allowlist_duration;
__u16 advmon_no_filter_duration;
__u8 enable_advmon_interleave_scan;
__u16 devid_source;
__u16 devid_vendor;

1
net/bluetooth/hci_core.c
View File

@ -3594,6 +3594,7 @@ struct hci_dev *hci_alloc_dev(void)
hdev->advmon_allowlist_duration = 300;
hdev->advmon_no_filter_duration = 500;
hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
hdev->sniff_max_interval = 800;
hdev->sniff_min_interval = 80;

3
net/bluetooth/hci_request.c
View File

@ -1057,7 +1057,8 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
&own_addr_type))
return;
if (__hci_update_interleaved_scan(hdev))
if (hdev->enable_advmon_interleave_scan &&
__hci_update_interleaved_scan(hdev))
return;
bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);

39
net/bluetooth/mgmt_config.c
View File

@ -17,12 +17,24 @@
__le16 value; \
} __packed _param_name_
#define HDEV_PARAM_U8(_param_name_) \
struct {\
struct mgmt_tlv entry; \
__u8 value; \
} __packed _param_name_
#define TLV_SET_U16(_param_code_, _param_name_) \
{ \
{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
cpu_to_le16(hdev->_param_name_) \
}
#define TLV_SET_U8(_param_code_, _param_name_) \
{ \
{ cpu_to_le16(_param_code_), sizeof(__u8) }, \
hdev->_param_name_ \
}
#define TLV_SET_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
{ \
{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
@ -65,6 +77,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
HDEV_PARAM_U16(def_le_autoconnect_timeout);
HDEV_PARAM_U16(advmon_allowlist_duration);
HDEV_PARAM_U16(advmon_no_filter_duration);
HDEV_PARAM_U8(enable_advmon_interleave_scan);
} __packed rp = {
TLV_SET_U16(0x0000, def_page_scan_type),
TLV_SET_U16(0x0001, def_page_scan_int),
@ -97,6 +110,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
def_le_autoconnect_timeout),
TLV_SET_U16(0x001d, advmon_allowlist_duration),
TLV_SET_U16(0x001e, advmon_no_filter_duration),
TLV_SET_U8(0x001f, enable_advmon_interleave_scan),
};
bt_dev_dbg(hdev, "sock %p", sk);
@ -109,6 +123,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
#define TO_TLV(x) ((struct mgmt_tlv *)(x))
#define TLV_GET_LE16(tlv) le16_to_cpu(*((__le16 *)(TO_TLV(tlv)->value)))
#define TLV_GET_U8(tlv) (*((__u8 *)(TO_TLV(tlv)->value)))
int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
u16 data_len)
@ -125,6 +140,7 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
/* First pass to validate the tlv */
while (buffer_left >= sizeof(struct mgmt_tlv)) {
const u8 len = TO_TLV(buffer)->length;
size_t exp_type_len;
const u16 exp_len = sizeof(struct mgmt_tlv) +
len;
const u16 type = le16_to_cpu(TO_TLV(buffer)->type);
@ -170,19 +186,25 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
case 0x001b:
case 0x001d:
case 0x001e:
if (len != sizeof(u16)) {
exp_type_len = sizeof(u16);
break;
case 0x001f:
exp_type_len = sizeof(u8);
break;
default:
exp_type_len = 0;
bt_dev_warn(hdev, "unsupported parameter %u", type);
break;
}
if (exp_type_len && len != exp_type_len) {
bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
len, sizeof(u16), type);
len, exp_type_len, type);
return mgmt_cmd_status(sk, hdev->id,
MGMT_OP_SET_DEF_SYSTEM_CONFIG,
MGMT_STATUS_INVALID_PARAMS);
}
break;
default:
bt_dev_warn(hdev, "unsupported parameter %u", type);
break;
}
buffer_left -= exp_len;
buffer += exp_len;
@ -289,6 +311,9 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
case 0x0001e:
hdev->advmon_no_filter_duration = TLV_GET_LE16(buffer);
break;
case 0x0001f:
hdev->enable_advmon_interleave_scan = TLV_GET_U8(buffer);
break;
default:
bt_dev_warn(hdev, "unsupported parameter %u", type);
break;