Bluetooth: MGMT: Fix LE simultaneous roles UUID if not supported

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>

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 7f5f00f..e2b06bb 100644 (file)
--- 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,
 };

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 61d8a07..0feb68f 100644 (file)
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5197,12 +5197,12 @@ int hci_le_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn)
 
        /* 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_dev *hdev, struct hci_conn *conn)
                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);

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 3326d94..6f192ef 100644 (file)
--- 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 sock *sk, struct hci_dev *hdev,
        }
 #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_changed(bool enabled, struct hci_dev *hdev,
 
 }
 
-#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 *sk, struct hci_dev *hdev,
                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 *sk, struct hci_dev *hdev,
                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 *sk, struct hci_dev *hdev,
                                &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(struct sock *sk, struct hci_dev *hdev,
                                &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 sock *sk, struct hci_dev *hdev,
                                &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)