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        <danielwinkler@danielwinkler-linux.mtv.corp.google.com>
Date:   Thu, 29 Oct 2020 16:06:16 -0700
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Message-Id: <20201029160317.Bluez.v6.4.I50d9faa25e9da6e71d77c83c7d47a5b135e88799@changeid>
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Subject: [Bluez PATCH v6 04/10] advertising: Detect if extended advertising
 mgmt commands are supported
From:   Daniel Winkler <danielwinkler@google.com>
To:     luiz.von.dentz@intel.com
Cc:     linux-bluetooth@vger.kernel.org,
        chromeos-bluetooth-upstreaming@chromium.org,
        Daniel Winkler <danielwinkler@google.com>,
        Sonny Sasaka <sonnysasaka@chromium.org>,
        Alain Michaud <alainm@chromium.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

We need to know if kernel supports the new MGMT interface. To do so, we
check the return from adapter's MGMT_OP_READ_COMMANDS call for the new
commands. This will later be used to route our requests for new
advertisements.

The change is tested by manually verifying that the correct MGMT
commands are used when the feature is and is not available in kernel.

Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
---

Changes in v6:
- Reserve new MGMT codes earlier in series to detect support

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2:
- Uses btd_has_kernel_features to detect kernel command support

 lib/mgmt.h        | 4 ++++
 src/adapter.c     | 4 ++++
 src/adapter.h     | 1 +
 src/advertising.c | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/lib/mgmt.h b/lib/mgmt.h
index 6aa0f5f88..59608e7ea 100644
--- a/lib/mgmt.h
+++ b/lib/mgmt.h
@@ -700,6 +700,10 @@ struct mgmt_rp_remove_adv_monitor {
 	uint16_t monitor_handle;
 } __packed;
 
+#define MGMT_OP_ADD_EXT_ADV_PARAMS		0x0054
+
+#define MGMT_OP_ADD_EXT_ADV_DATA		0x0055
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	uint16_t opcode;
diff --git a/src/adapter.c b/src/adapter.c
index 1f075ef5f..90beb897f 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -9566,6 +9566,10 @@ static void read_commands_complete(uint8_t status, uint16_t length,
 			DBG("kernel supports exp features");
 			kernel_features |= KERNEL_EXP_FEATURES;
 			break;
+		case MGMT_OP_ADD_EXT_ADV_PARAMS:
+			DBG("kernel supports ext adv commands");
+			kernel_features |= KERNEL_HAS_EXT_ADV_ADD_CMDS;
+			break;
 		default:
 			break;
 		}
diff --git a/src/adapter.h b/src/adapter.h
index dcc574857..ace72affd 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -233,6 +233,7 @@ enum kernel_features {
 	KERNEL_SET_SYSTEM_CONFIG	= 1 << 2,
 	KERNEL_EXP_FEATURES		= 1 << 3,
 	KERNEL_HAS_RESUME_EVT		= 1 << 4,
+	KERNEL_HAS_EXT_ADV_ADD_CMDS	= 1 << 5,
 };
 
 bool btd_has_kernel_features(uint32_t feature);
diff --git a/src/advertising.c b/src/advertising.c
index c03869e50..7c7599552 100644
--- a/src/advertising.c
+++ b/src/advertising.c
@@ -48,6 +48,7 @@ struct btd_adv_manager {
 	uint8_t max_ads;
 	uint32_t supported_flags;
 	unsigned int instance_bitmap;
+	bool extended_add_cmds;
 };
 
 #define AD_TYPE_BROADCAST 0
@@ -1417,6 +1418,8 @@ static struct btd_adv_manager *manager_create(struct btd_adapter *adapter,
 	manager->mgmt_index = btd_adapter_get_index(adapter);
 	manager->clients = queue_new();
 	manager->supported_flags = MGMT_ADV_FLAG_LOCAL_NAME;
+	manager->extended_add_cmds =
+			btd_has_kernel_features(KERNEL_HAS_EXT_ADV_ADD_CMDS);
 
 	if (!g_dbus_register_interface(btd_get_dbus_connection(),
 					adapter_get_path(manager->adapter),
-- 
2.29.1.341.ge80a0c044ae-goog