From 115c2b5a6806615206dfa5518509911bfc7b1d07 Mon Sep 17 00:00:00 2001 From: MORITA Kazutaka Date: Thu, 3 May 2012 05:26:07 +0900 Subject: [PATCH] sheepdog: switch to writethrough mode if cluster doesn't support flush 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 Signed-off-by: Kevin Wolf --- block/sheepdog.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/block/sheepdog.c b/block/sheepdog.c index 0ed6b193c9..e01d371680 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; -- GitLab