From: MORITA Kazutaka <morita.kazut...@gmail.com>
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 <morita.kazut...@gmail.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
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;
--
1.7.6.5
