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Message-Id: <20210618160016.v4.4.I20c79eef4f36c4a3802e1068e59ec4a9f4ded940@changeid>
Date: Fri, 18 Jun 2021 16:00:39 +0800
From: Joseph Hwang <josephsih@...omium.org>
To: linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
luiz.dentz@...il.com, pali@...nel.org
Cc: josephsih@...gle.com, chromeos-bluetooth-upstreaming@...omium.org,
Joseph Hwang <josephsih@...omium.org>,
Miao-chen Chou <mcchou@...omium.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Johan Hedberg <johan.hedberg@...il.com>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v4 4/4] Bluetooth: Support the quality report events
This patch allows a user space process to enable/disable the quality
report events dynamically through the set experimental feature mgmt
interface if CONFIG_BT_FEATURE_QUALITY_REPORT is enabled.
Since the quality report feature needs to invoke the callback function
provided by the driver, i.e., hdev->set_quality_report, a valid
controller index is required.
Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
Signed-off-by: Joseph Hwang <josephsih@...omium.org>
---
(no changes since v1)
include/net/bluetooth/hci.h | 4 ++
include/net/bluetooth/hci_core.h | 22 ++++--
net/bluetooth/Kconfig | 11 +++
net/bluetooth/mgmt.c | 118 ++++++++++++++++++++++++++++++-
4 files changed, 148 insertions(+), 7 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index b80415011dcd..2811b60e1acc 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -331,6 +331,10 @@ enum {
HCI_CMD_PENDING,
HCI_FORCE_NO_MITM,
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+ HCI_QUALITY_REPORT,
+#endif
+
__HCI_NUM_FLAGS,
};
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a53e94459ecd..c25de25a7036 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -605,6 +605,9 @@ struct hci_dev {
int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
void (*cmd_timeout)(struct hci_dev *hdev);
bool (*prevent_wake)(struct hci_dev *hdev);
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+ int (*set_quality_report)(struct hci_dev *hdev, bool enable);
+#endif
};
#define HCI_PHY_HANDLE(handle) (handle & 0xff)
@@ -752,12 +755,19 @@ extern struct mutex hci_cb_list_lock;
#define hci_dev_test_and_clear_flag(hdev, nr) test_and_clear_bit((nr), (hdev)->dev_flags)
#define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
-#define hci_dev_clear_volatile_flags(hdev) \
- do { \
- hci_dev_clear_flag(hdev, HCI_LE_SCAN); \
- hci_dev_clear_flag(hdev, HCI_LE_ADV); \
- hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
- hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+#define hci_dev_clear_flag_quality_report(x) { hci_dev_clear_flag(hdev, x); }
+#else
+#define hci_dev_clear_flag_quality_report(x) {}
+#endif
+
+#define hci_dev_clear_volatile_flags(hdev) \
+ do { \
+ hci_dev_clear_flag(hdev, HCI_LE_SCAN); \
+ hci_dev_clear_flag(hdev, HCI_LE_ADV); \
+ hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION); \
+ hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \
+ hci_dev_clear_flag_quality_report(HCI_QUALITY_REPORT) \
} while (0)
/* ----- HCI interface to upper protocols ----- */
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index e0ab4cd7afc3..d63c3cdf2d6f 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -148,4 +148,15 @@ config BT_FEATURE_DEBUG
This provides an option to enable/disable debugging statements
at runtime via the experimental features interface.
+config BT_FEATURE_QUALITY_REPORT
+ bool "Runtime option for logging controller quality report events"
+ depends on BT
+ default n
+ help
+ This provides an option to enable/disable controller quality report
+ events logging at runtime via the experimental features interface.
+ The quality report events may include the categories of system
+ exceptions, connections/disconnection, the link quality statistics,
+ etc.
+
source "drivers/bluetooth/Kconfig"
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index d1bf5a55ff85..0de089524d74 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3791,6 +3791,14 @@ static const u8 debug_uuid[16] = {
};
#endif
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+/* 330859bc-7506-492d-9370-9a6f0614037f */
+static const u8 quality_report_uuid[16] = {
+ 0x7f, 0x03, 0x14, 0x06, 0x6f, 0x9a, 0x70, 0x93,
+ 0x2d, 0x49, 0x06, 0x75, 0xbc, 0x59, 0x08, 0x33,
+};
+#endif
+
/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */
static const u8 simult_central_periph_uuid[16] = {
0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
@@ -3806,7 +3814,7 @@ static const u8 rpa_resolution_uuid[16] = {
static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len)
{
- char buf[62]; /* Enough space for 3 features */
+ char buf[82]; /* Enough space for 4 features: 2 + 20 * 4 */
struct mgmt_rp_read_exp_features_info *rp = (void *)buf;
u16 idx = 0;
u32 flags;
@@ -3850,6 +3858,26 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
idx++;
}
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+ if (hdev) {
+ if (hdev->set_quality_report) {
+ /* BIT(0): indicating if set_quality_report is
+ * supported by controller.
+ */
+ flags = BIT(0);
+
+ /* BIT(1): indicating if the feature is enabled. */
+ if (hci_dev_test_flag(hdev, HCI_QUALITY_REPORT))
+ flags |= BIT(1);
+ } else {
+ flags = 0;
+ }
+ memcpy(rp->features[idx].uuid, quality_report_uuid, 16);
+ rp->features[idx].flags = cpu_to_le32(flags);
+ idx++;
+ }
+#endif
+
rp->feature_count = cpu_to_le16(idx);
/* After reading the experimental features information, enable
@@ -3892,6 +3920,23 @@ static int exp_debug_feature_changed(bool enabled, struct sock *skip)
}
#endif
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+static int exp_quality_report_feature_changed(bool enabled, struct sock *skip)
+{
+ struct mgmt_ev_exp_feature_changed ev;
+
+ BT_INFO("enabled %d", enabled);
+
+ memset(&ev, 0, sizeof(ev));
+ memcpy(ev.uuid, quality_report_uuid, 16);
+ ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);
+
+ return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL,
+ &ev, sizeof(ev),
+ HCI_MGMT_EXP_FEATURE_EVENTS, skip);
+}
+#endif
+
static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
void *data, u16 data_len)
{
@@ -4038,6 +4083,77 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
return err;
}
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+ if (!memcmp(cp->uuid, quality_report_uuid, 16)) {
+ bool val, changed;
+ int err;
+
+ /* Command requires to use a valid controller index */
+ if (!hdev)
+ return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_INDEX);
+
+ /* Parameters are limited to a single octet */
+ if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ /* Only boolean on/off is supported */
+ if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ hci_req_sync_lock(hdev);
+
+ val = !!cp->param[0];
+ changed = (val != hci_dev_test_flag(hdev, HCI_QUALITY_REPORT));
+
+ if (!hdev->set_quality_report) {
+ BT_INFO("quality report not supported");
+ err = mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_NOT_SUPPORTED);
+ goto unlock_quality_report;
+ }
+
+ if (changed) {
+ err = hdev->set_quality_report(hdev, val);
+ if (err) {
+ BT_ERR("set_quality_report value %d err %d",
+ val, err);
+ err = mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_FAILED);
+ goto unlock_quality_report;
+ }
+ if (val)
+ hci_dev_set_flag(hdev, HCI_QUALITY_REPORT);
+ else
+ hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);
+ }
+
+ BT_INFO("quality report enable %d changed %d",
+ val, changed);
+
+ memcpy(rp.uuid, quality_report_uuid, 16);
+ rp.flags = cpu_to_le32(val ? BIT(0) : 0);
+ hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
+ err = mgmt_cmd_complete(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE, 0,
+ &rp, sizeof(rp));
+
+ if (changed)
+ exp_quality_report_feature_changed(val, sk);
+
+unlock_quality_report:
+ hci_req_sync_unlock(hdev);
+ return err;
+ }
+#endif
+
return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
MGMT_OP_SET_EXP_FEATURE,
MGMT_STATUS_NOT_SUPPORTED);
--
2.32.0.288.g62a8d224e6-goog
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