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Subject[PATCH v3 6/6] Bluetooth: Add toggle to switch off interleave scan
From
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>
---

(no changes since v1)

include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/hci_core.c | 1 +
net/bluetooth/hci_request.c | 3 ++-
net/bluetooth/mgmt_config.c | 6 ++++++
4 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 179350f869fdb..c3253f1cac0c2 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -363,6 +363,7 @@ struct hci_dev {
__u32 clock;
__u16 advmon_allowlist_duration;
__u16 advmon_no_filter_duration;
+ __u16 enable_advmon_interleave_scan;

__u16 devid_source;
__u16 devid_vendor;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 6c8850149265a..4608715860cce 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3595,6 +3595,7 @@ struct hci_dev *hci_alloc_dev(void)
/* The default values will be chosen in the future */
hdev->advmon_allowlist_duration = 300;
hdev->advmon_no_filter_duration = 500;
+ hdev->enable_advmon_interleave_scan = 0x0001; /* Default to enable */

hdev->sniff_max_interval = 800;
hdev->sniff_min_interval = 80;
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 1fcf6736811e4..bb38e1dead68f 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -500,7 +500,8 @@ static void __hci_update_background_scan(struct hci_request *req)
if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
hci_req_add_le_scan_disable(req, false);

- if (!update_adv_monitor_scan_state(hdev)) {
+ if (!hdev->enable_advmon_interleave_scan ||
+ !update_adv_monitor_scan_state(hdev)) {
hci_req_add_le_passive_scan(req);
bt_dev_dbg(hdev, "%s starting background scanning",
hdev->name);
diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
index 1802f7023158c..b4198c33a1b72 100644
--- a/net/bluetooth/mgmt_config.c
+++ b/net/bluetooth/mgmt_config.c
@@ -69,6 +69,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
def_le_autoconnect_timeout),
HDEV_PARAM_U16(0x001d, advmon_allowlist_duration),
HDEV_PARAM_U16(0x001e, advmon_no_filter_duration),
+ HDEV_PARAM_U16(0x001f, enable_advmon_interleave_scan),
};
struct mgmt_rp_read_def_system_config *rp = (void *)params;

@@ -142,6 +143,7 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
case 0x001b:
case 0x001d:
case 0x001e:
+ case 0x001f:
if (len != sizeof(u16)) {
bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
len, sizeof(u16), type);
@@ -263,6 +265,10 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
hdev->advmon_no_filter_duration =
TLV_GET_LE16(buffer);
break;
+ case 0x0001f:
+ hdev->enable_advmon_interleave_scan =
+ TLV_GET_LE16(buffer);
+ break;
default:
bt_dev_warn(hdev, "unsupported parameter %u", type);
break;
--
2.28.0.681.g6f77f65b4e-goog
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