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[107.146.107.67]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-4eafecbab81sm1231658e0c.0.2024.06.03.11.53.16 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 11:53:16 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH BlueZ v2 3/3] set: Attempt to use existing set gatt-db Date: Mon, 3 Jun 2024 14:53:12 -0400 Message-ID: <20240603185312.162337-3-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240603185312.162337-1-luiz.dentz@gmail.com> References: <20240603185312.162337-1-luiz.dentz@gmail.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Luiz Augusto von Dentz Most sets should be clone of each other, or at least very similar, so this attempts to clone the existing gatt-db of the first member found when connecting new sets, this substantially speed up the process of bonding sets if their database matches which is something that is currently ranging from 20-30 seconds depending on the manufacturer and with this changes it cuts 5-10 seconds by bypassing discovery all procedure of other members. If the dbs don't really match bt_gatt_client instance will attempt to rediscover the ranges that don't match. --- src/device.c | 21 +++++++++++++++++++++ src/device.h | 1 + src/set.c | 22 ++++++++++++++++++++-- src/shared/gatt-db.c | 4 ++-- 4 files changed, 44 insertions(+), 4 deletions(-) diff --git a/src/device.c b/src/device.c index 620bbd55ebad..5dc1cd0cdbf2 100644 --- a/src/device.c +++ b/src/device.c @@ -6994,6 +6994,27 @@ struct gatt_db *btd_device_get_gatt_db(struct btd_device *device) return device->db; } +bool btd_device_set_gatt_db(struct btd_device *device, struct gatt_db *db) +{ + struct gatt_db *clone; + + if (!device) + return false; + + clone = gatt_db_clone(db); + if (clone) + return false; + + gatt_db_unregister(device->db, device->db_id); + gatt_db_unref(device->db); + + device->db = clone; + device->db_id = gatt_db_register(device->db, gatt_service_added, + gatt_service_removed, device, NULL); + + return true; +} + struct bt_gatt_client *btd_device_get_gatt_client(struct btd_device *device) { if (!device) diff --git a/src/device.h b/src/device.h index a2b7bb15d200..0794f92d0178 100644 --- a/src/device.h +++ b/src/device.h @@ -66,6 +66,7 @@ struct gatt_primary *btd_device_get_primary(struct btd_device *device, const char *uuid); GSList *btd_device_get_primaries(struct btd_device *device); struct gatt_db *btd_device_get_gatt_db(struct btd_device *device); +bool btd_device_set_gatt_db(struct btd_device *device, struct gatt_db *db); struct bt_gatt_client *btd_device_get_gatt_client(struct btd_device *device); struct bt_gatt_server *btd_device_get_gatt_server(struct btd_device *device); bool btd_device_is_initiator(struct btd_device *device); diff --git a/src/set.c b/src/set.c index bf35ee403b39..4ca2f78c3702 100644 --- a/src/set.c +++ b/src/set.c @@ -28,6 +28,8 @@ #include "src/shared/queue.h" #include "src/shared/ad.h" #include "src/shared/crypto.h" +#include "src/shared/att.h" +#include "src/shared/gatt-db.h" #include "log.h" #include "error.h" @@ -277,8 +279,24 @@ static void foreach_rsi(void *data, void *user_data) bt_crypto_unref(crypto); - if (!memcmp(ad->data, res, sizeof(res))) - device_connect_le(set->device); + if (memcmp(ad->data, res, sizeof(res))) + return; + + /* Attempt to use existing gatt_db from set if device has never been + * connected before. + * + * If dbs don't really match bt_gatt_client will attempt to rediscover + * the ranges that don't match. + */ + if (gatt_db_isempty(btd_device_get_gatt_db(set->device))) { + struct btd_device *device; + + device = queue_get_entries(set->devices)->data; + btd_device_set_gatt_db(set->device, + btd_device_get_gatt_db(device)); + } + + device_connect_le(set->device); } static void foreach_device(struct btd_device *device, void *data) diff --git a/src/shared/gatt-db.c b/src/shared/gatt-db.c index d8d21392fee6..16abcba2ec1c 100644 --- a/src/shared/gatt-db.c +++ b/src/shared/gatt-db.c @@ -278,8 +278,8 @@ static void service_clone(void *data, void *user_data) for (i = 0; i < service->num_handles; i++) { struct gatt_db_attribute *attr = service->attributes[i]; - /* Only clone values for characteristics since that is - * cacheable. + /* Only clone values for characteristics declaration since that + * is considered when calculating the db hash. */ if (bt_uuid_len(&attr->uuid) == 2 && attr->uuid.value.u16 == GATT_CHARAC_UUID)