From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Wed, 22 Dec 2021 12:22:00 -0800
Subject: Bluetooth: MGMT: Fix LE simultaneous roles UUID if not supported
Patch-mainline: v5.17-rc1
Git-commit: 76d0685bbac8ae017e5d12eba25fb3c4f0ec77ac
References: jsc#PED-1407
If controller/driver don't support LE simultaneous roles its UUID shall
be omitted when responding to MGMT_OP_READ_EXP_FEATURES_INFO.
This also rework the support introducing HCI_LE_SIMULTANEOUS_ROLES flag
so it can be detected when userspace wants to use or not.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
include/net/bluetooth/hci.h | 1
net/bluetooth/hci_sync.c | 10 +--
net/bluetooth/mgmt.c | 114 +++++++++++++++++++++++++++-----------------
3 files changed, 78 insertions(+), 47 deletions(-)
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -341,6 +341,7 @@ enum {
HCI_FORCE_NO_MITM,
HCI_QUALITY_REPORT,
HCI_OFFLOAD_CODECS_ENABLED,
+ HCI_LE_SIMULTANEOUS_ROLES,
__HCI_NUM_FLAGS,
};
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5197,12 +5197,12 @@ int hci_le_create_conn_sync(struct hci_d
/* If requested to connect as peripheral use directed advertising */
if (conn->role == HCI_ROLE_SLAVE) {
- /* If we're active scanning and the controller doesn't support
- * simultaneous roles simply reject the attempt.
+ /* If we're active scanning and simultaneous roles is not
+ * enabled simply reject the attempt.
*/
if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
hdev->le_scan_type == LE_SCAN_ACTIVE &&
- !hci_dev_le_state_simultaneous(hdev)) {
+ !hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES)) {
hci_conn_del(conn);
return -EBUSY;
}
@@ -5214,8 +5214,8 @@ int hci_le_create_conn_sync(struct hci_d
goto done;
}
- /* Disable advertising if simultaneous roles is not supported. */
- if (!hci_dev_le_state_simultaneous(hdev))
+ /* Disable advertising if simultaneous roles is not in use. */
+ if (!hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
hci_pause_advertising_sync(hdev);
params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3882,7 +3882,7 @@ static const u8 offload_codecs_uuid[16]
};
/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */
-static const u8 simult_central_periph_uuid[16] = {
+static const u8 le_simultaneous_roles_uuid[16] = {
0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67,
};
@@ -3915,13 +3915,13 @@ static int read_exp_features_info(struct
}
#endif
- if (hdev) {
- if (hci_dev_le_state_simultaneous(hdev))
+ if (hdev && hci_dev_le_state_simultaneous(hdev)) {
+ if (hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES))
flags = BIT(0);
else
flags = 0;
- memcpy(rp->features[idx].uuid, simult_central_periph_uuid, 16);
+ memcpy(rp->features[idx].uuid, le_simultaneous_roles_uuid, 16);
rp->features[idx].flags = cpu_to_le32(flags);
idx++;
}
@@ -3992,29 +3992,13 @@ static int exp_ll_privacy_feature_change
}
-#ifdef CONFIG_BT_FEATURE_DEBUG
-static int exp_debug_feature_changed(bool enabled, struct sock *skip)
-{
- struct mgmt_ev_exp_feature_changed ev;
-
- memset(&ev, 0, sizeof(ev));
- memcpy(ev.uuid, debug_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 exp_quality_report_feature_changed(bool enabled,
- struct hci_dev *hdev,
- struct sock *skip)
+static int exp_feature_changed(struct hci_dev *hdev, const u8 *uuid,
+ bool enabled, struct sock *skip)
{
struct mgmt_ev_exp_feature_changed ev;
memset(&ev, 0, sizeof(ev));
- memcpy(ev.uuid, quality_report_uuid, 16);
+ memcpy(ev.uuid, uuid, 16);
ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);
return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
@@ -4044,7 +4028,7 @@ static int set_zero_key_func(struct sock
bt_dbg_set(false);
if (changed)
- exp_debug_feature_changed(false, sk);
+ exp_feature_changed(NULL, ZERO_KEY, false, sk);
}
#endif
@@ -4054,7 +4038,8 @@ static int set_zero_key_func(struct sock
changed = hci_dev_test_and_clear_flag(hdev,
HCI_ENABLE_LL_PRIVACY);
if (changed)
- exp_ll_privacy_feature_changed(false, hdev, sk);
+ exp_feature_changed(hdev, rpa_resolution_uuid, false,
+ sk);
}
hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
@@ -4105,7 +4090,7 @@ static int set_debug_func(struct sock *s
&rp, sizeof(rp));
if (changed)
- exp_debug_feature_changed(val, sk);
+ exp_feature_changed(hdev, debug_uuid, val, sk);
return err;
}
@@ -4243,27 +4228,13 @@ static int set_quality_report_func(struc
&rp, sizeof(rp));
if (changed)
- exp_quality_report_feature_changed(val, hdev, sk);
+ exp_feature_changed(hdev, quality_report_uuid, val, sk);
unlock_quality_report:
hci_req_sync_unlock(hdev);
return err;
}
-static int exp_offload_codec_feature_changed(bool enabled, struct hci_dev *hdev,
- struct sock *skip)
-{
- struct mgmt_ev_exp_feature_changed ev;
-
- memset(&ev, 0, sizeof(ev));
- memcpy(ev.uuid, offload_codecs_uuid, 16);
- ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);
-
- return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
- &ev, sizeof(ev),
- HCI_MGMT_EXP_FEATURE_EVENTS, skip);
-}
-
static int set_offload_codec_func(struct sock *sk, struct hci_dev *hdev,
struct mgmt_cp_set_exp_feature *cp,
u16 data_len)
@@ -4317,7 +4288,65 @@ static int set_offload_codec_func(struct
&rp, sizeof(rp));
if (changed)
- exp_offload_codec_feature_changed(val, hdev, sk);
+ exp_feature_changed(hdev, offload_codecs_uuid, val, sk);
+
+ return err;
+}
+
+static int set_le_simultaneous_roles_func(struct sock *sk, struct hci_dev *hdev,
+ struct mgmt_cp_set_exp_feature *cp,
+ u16 data_len)
+{
+ bool val, changed;
+ int err;
+ struct mgmt_rp_set_exp_feature rp;
+
+ /* 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);
+
+ val = !!cp->param[0];
+ changed = (val != hci_dev_test_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES));
+
+ if (!hci_dev_le_state_simultaneous(hdev)) {
+ return mgmt_cmd_status(sk, hdev->id,
+ MGMT_OP_SET_EXP_FEATURE,
+ MGMT_STATUS_NOT_SUPPORTED);
+ }
+
+ if (changed) {
+ if (val)
+ hci_dev_set_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES);
+ else
+ hci_dev_clear_flag(hdev, HCI_LE_SIMULTANEOUS_ROLES);
+ }
+
+ bt_dev_info(hdev, "LE simultanous roles enable %d changed %d",
+ val, changed);
+
+ memcpy(rp.uuid, le_simultaneous_roles_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_feature_changed(hdev, le_simultaneous_roles_uuid, val, sk);
return err;
}
@@ -4334,6 +4363,7 @@ static const struct mgmt_exp_feature {
EXP_FEAT(rpa_resolution_uuid, set_rpa_resolution_func),
EXP_FEAT(quality_report_uuid, set_quality_report_func),
EXP_FEAT(offload_codecs_uuid, set_offload_codec_func),
+ EXP_FEAT(le_simultaneous_roles_uuid, set_le_simultaneous_roles_func),
/* end with a null feature */
EXP_FEAT(NULL, NULL)