From patchwork Wed May 9 14:58:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 10389721 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 C27AD60318 for ; Wed, 9 May 2018 15:06:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B16A428FB5 for ; Wed, 9 May 2018 15:06:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A526229048; Wed, 9 May 2018 15:06:49 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, 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 401E028FB5 for ; Wed, 9 May 2018 15:06:49 +0000 (UTC) Received: from localhost ([::1]:57009 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fGQg4-000789-B3 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 09 May 2018 11:06:48 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56846) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fGQYn-0007UP-7Z for qemu-devel@nongnu.org; Wed, 09 May 2018 10:59:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fGQYm-0007Hj-9N for qemu-devel@nongnu.org; Wed, 09 May 2018 10:59:17 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:45916 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fGQYe-00072j-Pz; Wed, 09 May 2018 10:59:08 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4AD174059FEB; Wed, 9 May 2018 14:59:08 +0000 (UTC) Received: from lemon.usersys.redhat.com (ovpn-12-170.pek2.redhat.com [10.72.12.170]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0FF95D74B9; Wed, 9 May 2018 14:58:59 +0000 (UTC) From: Fam Zheng To: qemu-devel@nongnu.org Date: Wed, 9 May 2018 22:58:12 +0800 Message-Id: <20180509145815.3330-7-famz@redhat.com> In-Reply-To: <20180509145815.3330-1-famz@redhat.com> References: <20180509145815.3330-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Wed, 09 May 2018 14:59:08 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Wed, 09 May 2018 14:59:08 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'famz@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v3 6/9] iscsi: Create and use iscsi_co_wait_for_task 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: Kevin Wolf , Fam Zheng , Stefan Hajnoczi , qemu-block@nongnu.org, Peter Lieven , Max Reitz , Ronnie Sahlberg , Paolo Bonzini Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This loop is repeated a growing number times. Make a helper. Signed-off-by: Fam Zheng Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi --- block/iscsi.c | 54 +++++++++++++++++------------------------------------- 1 file changed, 17 insertions(+), 37 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index 5811ff1d51..32e755c021 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -556,6 +556,17 @@ static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun, offset / iscsilun->cluster_size) == size); } +static void coroutine_fn iscsi_co_wait_for_task(IscsiTask *iTask, + IscsiLun *iscsilun) +{ + while (!iTask->complete) { + iscsi_set_events(iscsilun); + qemu_mutex_unlock(&iscsilun->mutex); + qemu_coroutine_yield(); + qemu_mutex_lock(&iscsilun->mutex); + } +} + static int coroutine_fn iscsi_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *iov, int flags) @@ -617,12 +628,7 @@ retry: scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); #endif - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); @@ -693,13 +699,7 @@ retry: ret = -ENOMEM; goto out_unlock; } - - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.do_retry) { if (iTask.task != NULL) { @@ -863,13 +863,8 @@ retry: #if LIBISCSI_API_VERSION < (20160603) scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); #endif - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); iTask.task = NULL; @@ -906,12 +901,7 @@ retry: return -ENOMEM; } - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); @@ -1143,12 +1133,7 @@ retry: goto out_unlock; } - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); @@ -1244,12 +1229,7 @@ retry: return -ENOMEM; } - while (!iTask.complete) { - iscsi_set_events(iscsilun); - qemu_mutex_unlock(&iscsilun->mutex); - qemu_coroutine_yield(); - qemu_mutex_lock(&iscsilun->mutex); - } + iscsi_co_wait_for_task(&iTask, iscsilun); if (iTask.status == SCSI_STATUS_CHECK_CONDITION && iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&