From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50823) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SPg8J-0003yD-I5 for qemu-devel@nongnu.org; Wed, 02 May 2012 16:26:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SPg8H-00049m-Dl for qemu-devel@nongnu.org; Wed, 02 May 2012 16:26:43 -0400 Received: from sh.osrg.net ([192.16.179.4]:36490) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SPg8G-00048l-US for qemu-devel@nongnu.org; Wed, 02 May 2012 16:26:41 -0400 From: MORITA Kazutaka Date: Thu, 3 May 2012 05:26:07 +0900 Message-Id: <1335990367-18749-1-git-send-email-morita.kazutaka@gmail.com> Sender: kazutaka Subject: [Qemu-devel] [PATCH] sheepdog: switch to writethrough mode if cluster doesn't support flush List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kwolf@redhat.com Cc: morita.kazutaka@gmail.com, namei.unix@gmail.com, hch@lst.de, qemu-devel@nongnu.org This is necessary for qemu to work with the older version of Sheepdog which doesn't support SD_OP_FLUSH_VDI. Signed-off-by: MORITA Kazutaka --- block/sheepdog.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/block/sheepdog.c b/block/sheepdog.c index 0ed6b19..e01d371 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -1678,6 +1678,14 @@ static int coroutine_fn sd_co_flush_to_disk(BlockDriverState *bs) return ret; } + if (rsp->result == SD_RES_INVALID_PARMS) { + dprintf("disable write cache since the server doesn't support it\n"); + + s->cache_enabled = 0; + closesocket(s->flush_fd); + return 0; + } + if (rsp->result != SD_RES_SUCCESS) { error_report("%s", sd_strerror(rsp->result)); return -EIO; -- 1.7.2.5