From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47628) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dmUCF-0000yq-L7 for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:16:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dmUCC-0005DU-M7 for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:15:59 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:51083) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dmUCC-0005Ca-BQ for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:15:56 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v7T0Eesg078680 for ; Mon, 28 Aug 2017 20:15:55 -0400 Received: from e15.ny.us.ibm.com (e15.ny.us.ibm.com [129.33.205.205]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cmnx0yuma-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 28 Aug 2017 20:15:55 -0400 Received: from localhost by e15.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 28 Aug 2017 20:15:53 -0400 From: Michael Roth Date: Mon, 28 Aug 2017 19:13:57 -0500 In-Reply-To: <1503965694-10794-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1503965694-10794-1-git-send-email-mdroth@linux.vnet.ibm.com> Message-Id: <1503965694-10794-23-git-send-email-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 22/79] qemu-img: wait for convert coroutines to complete List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Anton Nefedov , Kevin Wolf From: Anton Nefedov On error path (like i/o error in one of the coroutines), it's required to - wait for coroutines completion before cleaning the common structures - reenter dependent coroutines so they ever finish Introduced in 2d9187bc65. Cc: qemu-stable@nongnu.org Signed-off-by: Anton Nefedov Reviewed-by: Peter Lieven Signed-off-by: Kevin Wolf (cherry picked from commit b91127edd0ff96f27f1e58e47f4e9f9d6a0fed02) Signed-off-by: Michael Roth --- qemu-img.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 2e61561..26ded22 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1761,13 +1761,13 @@ static void coroutine_fn convert_co_do_copy(void *opaque) qemu_co_mutex_lock(&s->lock); if (s->ret != -EINPROGRESS || s->sector_num >= s->total_sectors) { qemu_co_mutex_unlock(&s->lock); - goto out; + break; } n = convert_iteration_sectors(s, s->sector_num); if (n < 0) { qemu_co_mutex_unlock(&s->lock); s->ret = n; - goto out; + break; } /* save current sector and allocation status to local variables */ sector_num = s->sector_num; @@ -1792,7 +1792,6 @@ static void coroutine_fn convert_co_do_copy(void *opaque) error_report("error while reading sector %" PRId64 ": %s", sector_num, strerror(-ret)); s->ret = ret; - goto out; } } else if (!s->min_sparse && status == BLK_ZERO) { status = BLK_DATA; @@ -1801,22 +1800,20 @@ static void coroutine_fn convert_co_do_copy(void *opaque) if (s->wr_in_order) { /* keep writes in order */ - while (s->wr_offs != sector_num) { - if (s->ret != -EINPROGRESS) { - goto out; - } + while (s->wr_offs != sector_num && s->ret == -EINPROGRESS) { s->wait_sector_num[index] = sector_num; qemu_coroutine_yield(); } s->wait_sector_num[index] = -1; } - ret = convert_co_write(s, sector_num, n, buf, status); - if (ret < 0) { - error_report("error while writing sector %" PRId64 - ": %s", sector_num, strerror(-ret)); - s->ret = ret; - goto out; + if (s->ret == -EINPROGRESS) { + ret = convert_co_write(s, sector_num, n, buf, status); + if (ret < 0) { + error_report("error while writing sector %" PRId64 + ": %s", sector_num, strerror(-ret)); + s->ret = ret; + } } if (s->wr_in_order) { @@ -1837,7 +1834,6 @@ static void coroutine_fn convert_co_do_copy(void *opaque) } } -out: qemu_vfree(buf); s->co[index] = NULL; s->running_coroutines--; @@ -1899,7 +1895,7 @@ static int convert_do_copy(ImgConvertState *s) qemu_coroutine_enter(s->co[i]); } - while (s->ret == -EINPROGRESS) { + while (s->running_coroutines) { main_loop_wait(false); } -- 2.7.4