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(syn-107-146-107-067.res.spectrum.com. [107.146.107.67]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-4806cb6c492sm282866137.14.2024.05.09.13.59.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 May 2024 13:59:05 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [RFC v1] Bluetooth: MGMT: Make MGMT_OP_LOAD_CONN_PARAM update existing connection Date: Thu, 9 May 2024 16:59:04 -0400 Message-ID: <20240509205904.1275416-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.44.0 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 This makes MGMT_OP_LOAD_CONN_PARAM update existing connection by dectecting the request is just for one connection, parameters already exists and there is a connection. Since this is a new behavior the revision is also updated to enable userspace to detect it. Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_sync.c | 18 +++++++++++++++ net/bluetooth/mgmt.c | 47 ++++++++++++++++++++++++++++++++++++++-- 2 files changed, 63 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 891cae8a30da..9f8ef175c251 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -6712,3 +6712,21 @@ int hci_cancel_connect_sync(struct hci_dev *hdev, struct hci_conn *conn) return -ENOENT; } + +int hci_le_conn_update_sync(struct hci_dev *hdev, struct hci_conn *conn, + struct hci_conn_params *params) +{ + struct hci_cp_le_conn_update cp; + + memset(&cp, 0, sizeof(cp)); + cp.handle = cpu_to_le16(conn->handle); + cp.conn_interval_min = cpu_to_le16(params->conn_min_interval); + cp.conn_interval_max = cpu_to_le16(params->conn_max_interval); + cp.conn_latency = cpu_to_le16(params->conn_latency); + cp.supervision_timeout = cpu_to_le16(params->supervision_timeout); + cp.min_ce_len = cpu_to_le16(0x0000); + cp.max_ce_len = cpu_to_le16(0x0000); + + return __hci_cmd_sync_status(hdev, HCI_OP_LE_CONN_UPDATE, + sizeof(cp), &cp, HCI_CMD_TIMEOUT); +} diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 64e66d911c74..7e81eaddba85 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -42,7 +42,7 @@ #include "aosp.h" #define MGMT_VERSION 1 -#define MGMT_REVISION 22 +#define MGMT_REVISION 23 static const u16 mgmt_commands[] = { MGMT_OP_READ_INDEX_LIST, @@ -7874,6 +7874,18 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev, return err; } +static int conn_update_sync(struct hci_dev *hdev, void *data) +{ + struct hci_conn_params *params = data; + + conn = hci_conn_hash_lookup_le(hdev, params->addr.bdaddr, + params->addr_type); + if (!conn) + return -ECANCELED + + return hci_le_conn_update_sync(hdev, conn, params); +} + static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data, u16 len) { @@ -7907,13 +7919,15 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data, hci_dev_lock(hdev); - hci_conn_params_clear_disabled(hdev); + if (i > 1) + hci_conn_params_clear_disabled(hdev); for (i = 0; i < param_count; i++) { struct mgmt_conn_param *param = &cp->params[i]; struct hci_conn_params *hci_param; u16 min, max, latency, timeout; u8 addr_type; + bool update; bt_dev_dbg(hdev, "Adding %pMR (type %u)", ¶m->addr.bdaddr, param->addr.type); @@ -7940,6 +7954,19 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data, continue; } + /* Detect when the loading is for an existing parameter then + * attempt to trigger the connection update procedure. + */ + if (!i && params == 1) { + hci_param = hci_conn_params_lookup(hdev, + ¶m->addr.bdaddr, + addr_type); + if (hci_param) + update = true; + else + hci_conn_params_clear_disabled(hdev); + } + hci_param = hci_conn_params_add(hdev, ¶m->addr.bdaddr, addr_type); if (!hci_param) { @@ -7951,6 +7978,22 @@ static int load_conn_param(struct sock *sk, struct hci_dev *hdev, void *data, hci_param->conn_max_interval = max; hci_param->conn_latency = latency; hci_param->supervision_timeout = timeout; + + if (update) { + struct hci_conn *conn; + + conn = hci_conn_hash_lookup_le(hdev, + params->addr.bdaddr, + addr_type); + if (conn && conn->role == HCI_ROLE_MASTER && + (conn->le_conn_min_interval != min || + conn->le_conn_max_interval != max || + conn->le_conn_latency != latency || + conn->le_supervision_timeout != timeout)) + hci_cmd_sync_queue(hdev, conn_update_sync, + hci_params, NULL); + } + } } hci_dev_unlock(hdev);