From patchwork Fri Nov 6 23:20:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Winkler X-Patchwork-Id: 321187 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49935C55179 for ; Fri, 6 Nov 2020 23:20:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E241420867 for ; Fri, 6 Nov 2020 23:20:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dpcsma2w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728111AbgKFXUg (ORCPT ); Fri, 6 Nov 2020 18:20:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727859AbgKFXUg (ORCPT ); Fri, 6 Nov 2020 18:20:36 -0500 Received: from mail-qk1-x749.google.com (mail-qk1-x749.google.com [IPv6:2607:f8b0:4864:20::749]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A00AC0613D3 for ; Fri, 6 Nov 2020 15:20:34 -0800 (PST) Received: by mail-qk1-x749.google.com with SMTP id f126so1798124qke.17 for ; Fri, 06 Nov 2020 15:20:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=qCKTIk6ok2nzyOjT+W8oFEMA5y5me/um1ag42Yf+6JI=; b=dpcsma2wgTVriYQHC6IHei1h9amIcKsTw4Q/mORO0om4L6LrnXNZMGYqI4hsDl52gX RKaCieFlwr49xdQApbYQNOy5YAUii/mDjya1B/vV0nh/Ii7srPCpRK1hQ6YxF8gujFZx 0JIRJ5MevFVKr9TVW3RMPLIAgaNHL2DuonyqIrv6RM3foOPcr/RTfj1bUl3pHYskMaJw lxUCCBzWO3ezRtZE6tvLYv+o+RoPSbbBK7h+0zQYcmH4alNZFHEmIFTk8SCv6k/svgef nks7zi6xTsb6DQ/cUp+/goY+worUKmvbETSzcWdXBvkTtjgk1ZTQq5Um/YPkZpKf1dKo 72xg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=qCKTIk6ok2nzyOjT+W8oFEMA5y5me/um1ag42Yf+6JI=; b=efJ8bxQ6AIHHJO/rH/BATQkucv1JrvzbYz0XzAJ0/LNE4I0kUHIpnfPb9jmJu65TlM 8Wxy6VX7guJChoMAuP7QZKwav0gwmMHVscDaKO91PbC7v8agFaTUXEBaB2FlsKLOkN3w zXubOHiYFFUsdvPdixXbGPJYhkC6UnMcsmdoyxLlieIoDpl4RZDXhTaC8XVZ8ppClvUP VttL34TU9/Lm7sgCwBUK9aWHCduOfJ5FBKS+/cMFUAgzX9Hh/UH79CY/Z4qbYEUdpTMS EmR8w22OVFDNrLVTkb2FctTBNkpRxnFTxvdE0umjgqRDbskQQ1mgSxcCygxrH1DC4Mvj 7qUw== X-Gm-Message-State: AOAM53181T59fjT3VmP9ZInF9EBdEoaaMwyrd3I9jA+Otzq5exHYJMni Dsp3vh9Km7F/VP2ghz57w0VD+Ek7YQqWWvlLo7kf X-Google-Smtp-Source: ABdhPJzKUpTPGKEo90bduIJh7AIB7W76777TiJsPZsctXcwbqJ9wLcjlt7quOpcVkxW/faOTr2RuKGm4ksAcmO1ogFmO Sender: "danielwinkler via sendgmr" X-Received: from danielwinkler-linux.mtv.corp.google.com ([2620:15c:202:201:f693:9fff:fef4:4e59]) (user=danielwinkler job=sendgmr) by 2002:a05:6214:1787:: with SMTP id ct7mr3997641qvb.58.1604704833583; Fri, 06 Nov 2020 15:20:33 -0800 (PST) Date: Fri, 6 Nov 2020 15:20:19 -0800 Message-Id: <20201106151937.1.I8362b4cedb0f34b7a88b8dbd3a62155085e02ea7@changeid> Mime-Version: 1.0 X-Mailer: git-send-email 2.29.2.222.g5d2a92d10f8-goog Subject: [PATCH] Bluetooth: Resume advertising after LE connection From: Daniel Winkler To: marcel@holtmann.org Cc: linux-bluetooth@vger.kernel.org, chromeos-bluetooth-upstreaming@chromium.org, Daniel Winkler , Abhishek Pandit-Subedi , "David S. Miller" , Jakub Kicinski , Johan Hedberg , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org When an LE connection request is made, advertising is disabled and never resumed. When a client has an active advertisement, this is disruptive. This change adds resume logic for client-configured (non-directed) advertisements after the connection attempt. The patch was tested by registering an advertisement, initiating an LE connection from a remote peer, and verifying that the advertisement is re-activated after the connection is established. This is performed on Hatch and Kukui Chromebooks. Reviewed-by: Abhishek Pandit-Subedi Signed-off-by: Daniel Winkler --- net/bluetooth/hci_conn.c | 12 ++++++++++-- net/bluetooth/hci_request.c | 21 ++++++++++++++++----- net/bluetooth/hci_request.h | 2 ++ 3 files changed, 28 insertions(+), 7 deletions(-) diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index d0c1024bf60083..4f1cd8063e720a 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -758,6 +758,9 @@ static void create_le_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode) conn = hci_lookup_le_connect(hdev); + if (hdev->adv_instance_cnt) + hci_req_resume_adv_instances(hdev); + if (!status) { hci_connect_le_scan_cleanup(conn); goto done; @@ -1067,10 +1070,11 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, * connections most controllers will refuse to connect if * advertising is enabled, and for slave role connections we * anyway have to disable it in order to start directed - * advertising. + * advertising. Any registered advertisements will be + * re-enabled after the connection attempt is finished. */ if (hci_dev_test_flag(hdev, HCI_LE_ADV)) - __hci_req_disable_advertising(&req); + __hci_req_pause_adv_instances(&req); /* If requested to connect as slave use directed advertising */ if (conn->role == HCI_ROLE_SLAVE) { @@ -1118,6 +1122,10 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst, err = hci_req_run(&req, create_le_conn_complete); if (err) { hci_conn_del(conn); + + if (hdev->adv_instance_cnt) + hci_req_resume_adv_instances(hdev); + return ERR_PTR(err); } diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c index 6f12bab4d2fa6b..fdc6eccef9d107 100644 --- a/net/bluetooth/hci_request.c +++ b/net/bluetooth/hci_request.c @@ -1123,9 +1123,9 @@ static void cancel_adv_timeout(struct hci_dev *hdev) } /* This function requires the caller holds hdev->lock */ -static void hci_suspend_adv_instances(struct hci_request *req) +void __hci_req_pause_adv_instances(struct hci_request *req) { - bt_dev_dbg(req->hdev, "Suspending advertising instances"); + bt_dev_dbg(req->hdev, "Pausing advertising instances"); /* Call to disable any advertisements active on the controller. * This will succeed even if no advertisements are configured. @@ -1138,7 +1138,7 @@ static void hci_suspend_adv_instances(struct hci_request *req) } /* This function requires the caller holds hdev->lock */ -static void hci_resume_adv_instances(struct hci_request *req) +static void __hci_req_resume_adv_instances(struct hci_request *req) { struct adv_info *adv; @@ -1161,6 +1161,17 @@ static void hci_resume_adv_instances(struct hci_request *req) } } +/* This function requires the caller holds hdev->lock */ +int hci_req_resume_adv_instances(struct hci_dev *hdev) +{ + struct hci_request req; + + hci_req_init(&req, hdev); + __hci_req_resume_adv_instances(&req); + + return hci_req_run(&req, NULL); +} + static void suspend_req_complete(struct hci_dev *hdev, u8 status, u16 opcode) { bt_dev_dbg(hdev, "Request complete opcode=0x%x, status=0x%x", opcode, @@ -1214,7 +1225,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next) /* Pause other advertisements */ if (hdev->adv_instance_cnt) - hci_suspend_adv_instances(&req); + __hci_req_pause_adv_instances(&req); hdev->advertising_paused = true; hdev->advertising_old_state = old_state; @@ -1279,7 +1290,7 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next) /* Resume other advertisements */ if (hdev->adv_instance_cnt) - hci_resume_adv_instances(&req); + __hci_req_resume_adv_instances(&req); /* Unpause discovery */ hdev->discovery_paused = false; diff --git a/net/bluetooth/hci_request.h b/net/bluetooth/hci_request.h index 6a12e84c66c404..39ee8a18087a28 100644 --- a/net/bluetooth/hci_request.h +++ b/net/bluetooth/hci_request.h @@ -71,6 +71,8 @@ void hci_req_add_le_passive_scan(struct hci_request *req); void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next); void hci_req_disable_address_resolution(struct hci_dev *hdev); +void __hci_req_pause_adv_instances(struct hci_request *req); +int hci_req_resume_adv_instances(struct hci_dev *hdev); void hci_req_reenable_advertising(struct hci_dev *hdev); void __hci_req_enable_advertising(struct hci_request *req); void __hci_req_disable_advertising(struct hci_request *req);