From patchwork Tue Nov 15 04:14:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Cody X-Patchwork-Id: 9428969 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0692660755 for ; Tue, 15 Nov 2016 04:20:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6810428B41 for ; Tue, 15 Nov 2016 04:20:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5CF9628B2C; Tue, 15 Nov 2016 04:20:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0E8D428B2C for ; Tue, 15 Nov 2016 04:20:35 +0000 (UTC) Received: from localhost ([::1]:44061 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c6VER-00062r-BQ for patchwork-qemu-devel@patchwork.kernel.org; Mon, 14 Nov 2016 23:20:27 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50544) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c6V9G-0002FG-Co for qemu-devel@nongnu.org; Mon, 14 Nov 2016 23:15:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c6V9D-0008Dn-FI for qemu-devel@nongnu.org; Mon, 14 Nov 2016 23:15:06 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33338) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c6V9A-0008BD-J7; Mon, 14 Nov 2016 23:15:00 -0500 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E3093C04B924; Tue, 15 Nov 2016 04:14:59 +0000 (UTC) Received: from localhost (ovpn-112-50.phx2.redhat.com [10.3.112.50]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAF4EwXE028985 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 14 Nov 2016 23:14:59 -0500 From: Jeff Cody To: qemu-block@nongnu.org Date: Mon, 14 Nov 2016 23:14:41 -0500 Message-Id: <1479183291-14086-4-git-send-email-jcody@redhat.com> In-Reply-To: <1479183291-14086-1-git-send-email-jcody@redhat.com> References: <1479183291-14086-1-git-send-email-jcody@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Tue, 15 Nov 2016 04:14:59 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL for-2.8 03/13] blockjob: add .start field X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, jcody@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: John Snow Add an explicit start field to specify the entrypoint. We already have ownership of the coroutine itself AND managing the lifetime of the coroutine, let's take control of creation of the coroutine, too. This will allow us to delay creation of the actual coroutine until we know we'll actually start a BlockJob in block_job_start. This avoids the sticky question of how to "un-create" a Coroutine that hasn't been started yet. Signed-off-by: John Snow Reviewed-by: Kevin Wolf Message-id: 1478587839-9834-4-git-send-email-jsnow@redhat.com Signed-off-by: Jeff Cody --- block/backup.c | 25 +++++++++++++------------ block/commit.c | 3 ++- block/mirror.c | 4 +++- block/stream.c | 3 ++- include/block/blockjob_int.h | 3 +++ 5 files changed, 23 insertions(+), 15 deletions(-) diff --git a/block/backup.c b/block/backup.c index 734a24c..4ed4494 100644 --- a/block/backup.c +++ b/block/backup.c @@ -323,17 +323,6 @@ static void backup_drain(BlockJob *job) } } -static const BlockJobDriver backup_job_driver = { - .instance_size = sizeof(BackupBlockJob), - .job_type = BLOCK_JOB_TYPE_BACKUP, - .set_speed = backup_set_speed, - .commit = backup_commit, - .abort = backup_abort, - .clean = backup_clean, - .attached_aio_context = backup_attached_aio_context, - .drain = backup_drain, -}; - static BlockErrorAction backup_error_action(BackupBlockJob *job, bool read, int error) { @@ -542,6 +531,18 @@ static void coroutine_fn backup_run(void *opaque) block_job_defer_to_main_loop(&job->common, backup_complete, data); } +static const BlockJobDriver backup_job_driver = { + .instance_size = sizeof(BackupBlockJob), + .job_type = BLOCK_JOB_TYPE_BACKUP, + .start = backup_run, + .set_speed = backup_set_speed, + .commit = backup_commit, + .abort = backup_abort, + .clean = backup_clean, + .attached_aio_context = backup_attached_aio_context, + .drain = backup_drain, +}; + void backup_start(const char *job_id, BlockDriverState *bs, BlockDriverState *target, int64_t speed, MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap, @@ -653,7 +654,7 @@ void backup_start(const char *job_id, BlockDriverState *bs, block_job_add_bdrv(&job->common, target); job->common.len = len; - job->common.co = qemu_coroutine_create(backup_run, job); + job->common.co = qemu_coroutine_create(job->common.driver->start, job); block_job_txn_add_job(txn, &job->common); qemu_coroutine_enter(job->common.co); return; diff --git a/block/commit.c b/block/commit.c index e1eda89..20d27e2 100644 --- a/block/commit.c +++ b/block/commit.c @@ -205,6 +205,7 @@ static const BlockJobDriver commit_job_driver = { .instance_size = sizeof(CommitBlockJob), .job_type = BLOCK_JOB_TYPE_COMMIT, .set_speed = commit_set_speed, + .start = commit_run, }; void commit_start(const char *job_id, BlockDriverState *bs, @@ -288,7 +289,7 @@ void commit_start(const char *job_id, BlockDriverState *bs, s->backing_file_str = g_strdup(backing_file_str); s->on_error = on_error; - s->common.co = qemu_coroutine_create(commit_run, s); + s->common.co = qemu_coroutine_create(s->common.driver->start, s); trace_commit_start(bs, base, top, s, s->common.co); qemu_coroutine_enter(s->common.co); diff --git a/block/mirror.c b/block/mirror.c index b2c1fb8..659e09c 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -920,6 +920,7 @@ static const BlockJobDriver mirror_job_driver = { .instance_size = sizeof(MirrorBlockJob), .job_type = BLOCK_JOB_TYPE_MIRROR, .set_speed = mirror_set_speed, + .start = mirror_run, .complete = mirror_complete, .pause = mirror_pause, .attached_aio_context = mirror_attached_aio_context, @@ -930,6 +931,7 @@ static const BlockJobDriver commit_active_job_driver = { .instance_size = sizeof(MirrorBlockJob), .job_type = BLOCK_JOB_TYPE_COMMIT, .set_speed = mirror_set_speed, + .start = mirror_run, .complete = mirror_complete, .pause = mirror_pause, .attached_aio_context = mirror_attached_aio_context, @@ -1007,7 +1009,7 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs, } } - s->common.co = qemu_coroutine_create(mirror_run, s); + s->common.co = qemu_coroutine_create(s->common.driver->start, s); trace_mirror_start(bs, s, s->common.co, opaque); qemu_coroutine_enter(s->common.co); } diff --git a/block/stream.c b/block/stream.c index b05856b..92309ff 100644 --- a/block/stream.c +++ b/block/stream.c @@ -218,6 +218,7 @@ static const BlockJobDriver stream_job_driver = { .instance_size = sizeof(StreamBlockJob), .job_type = BLOCK_JOB_TYPE_STREAM, .set_speed = stream_set_speed, + .start = stream_run, }; void stream_start(const char *job_id, BlockDriverState *bs, @@ -254,7 +255,7 @@ void stream_start(const char *job_id, BlockDriverState *bs, s->bs_flags = orig_bs_flags; s->on_error = on_error; - s->common.co = qemu_coroutine_create(stream_run, s); + s->common.co = qemu_coroutine_create(s->common.driver->start, s); trace_stream_start(bs, base, s, s->common.co); qemu_coroutine_enter(s->common.co); } diff --git a/include/block/blockjob_int.h b/include/block/blockjob_int.h index 60d91a0..8223822 100644 --- a/include/block/blockjob_int.h +++ b/include/block/blockjob_int.h @@ -47,6 +47,9 @@ struct BlockJobDriver { /** Optional callback for job types that need to forward I/O status reset */ void (*iostatus_reset)(BlockJob *job); + /** Mandatory: Entrypoint for the Coroutine. */ + CoroutineEntry *start; + /** * Optional callback for job types whose completion must be triggered * manually.