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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, vsementsov@virtuozzo.com, eblake@redhat.com, mreitz@redhat.com, kwolf@redhat.com, rvkagan@yandex-team.ru, den@openvz.org Subject: [PATCH v3 13/33] block/nbd: introduce nbd_client_connection_release() Date: Fri, 16 Apr 2021 11:08:51 +0300 Message-Id: <20210416080911.83197-14-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210416080911.83197-1-vsementsov@virtuozzo.com> References: <20210416080911.83197-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-Originating-IP: [185.215.60.206] X-ClientProxiedBy: HE1P189CA0030.EURP189.PROD.OUTLOOK.COM (2603:10a6:7:53::43) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d6841c93-6f43-4eff-db06-08d900aefe6e X-MS-TrafficTypeDiagnostic: AM6PR08MB4691: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:114; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.14.137; envelope-from=vsementsov@virtuozzo.com; helo=EUR01-VE1-obe.outbound.protection.outlook.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Signed-off-by: Vladimir Sementsov-Ogievskiy --- block/nbd.c | 43 ++++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 21a4039359..8531d019b2 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -118,7 +118,7 @@ typedef struct BDRVNBDState { NBDClientConnection *conn; } BDRVNBDState; =20 -static void nbd_free_connect_thread(NBDClientConnection *conn); +static void nbd_client_connection_release(NBDClientConnection *conn); static int nbd_establish_connection(BlockDriverState *bs, SocketAddress *s= addr, Error **errp); static coroutine_fn QIOChannelSocket * @@ -130,20 +130,9 @@ static void nbd_yank(void *opaque); static void nbd_clear_bdrvstate(BlockDriverState *bs) { BDRVNBDState *s =3D (BDRVNBDState *)bs->opaque; - NBDClientConnection *conn =3D s->conn; - bool do_free; - - qemu_mutex_lock(&conn->mutex); - if (conn->running) { - conn->detached =3D true; - } - do_free =3D !conn->running && !conn->detached; - qemu_mutex_unlock(&conn->mutex); =20 - /* the runaway thread will clean it up itself */ - if (do_free) { - nbd_free_connect_thread(conn); - } + nbd_client_connection_release(s->conn); + s->conn =3D NULL; =20 yank_unregister_instance(BLOCKDEV_YANK_INSTANCE(bs->node_name)); =20 @@ -365,7 +354,7 @@ nbd_client_connection_new(const SocketAddress *saddr) return conn; } =20 -static void nbd_free_connect_thread(NBDClientConnection *conn) +static void nbd_client_connection_do_free(NBDClientConnection *conn) { if (conn->sioc) { qio_channel_close(QIO_CHANNEL(conn->sioc), NULL); @@ -379,8 +368,8 @@ static void nbd_free_connect_thread(NBDClientConnection= *conn) static void *connect_thread_func(void *opaque) { NBDClientConnection *conn =3D opaque; + bool do_free; int ret; - bool do_free =3D false; =20 conn->sioc =3D qio_channel_socket_new(); =20 @@ -405,12 +394,32 @@ static void *connect_thread_func(void *opaque) qemu_mutex_unlock(&conn->mutex); =20 if (do_free) { - nbd_free_connect_thread(conn); + nbd_client_connection_do_free(conn); } =20 return NULL; } =20 +static void nbd_client_connection_release(NBDClientConnection *conn) +{ + bool do_free; + + if (!conn) { + return; + } + + qemu_mutex_lock(&conn->mutex); + if (conn->running) { + conn->detached =3D true; + } + do_free =3D !conn->running && !conn->detached; + qemu_mutex_unlock(&conn->mutex); + + if (do_free) { + nbd_client_connection_do_free(conn); + } +} + /* * Get a new connection in context of @conn: * if thread is running, wait for completion --=20 2.29.2