On 13.06.2016 23:14, Eric Blake wrote:
On 05/31/2016 03:15 AM, Denis V. Lunev wrote:
From: Pavel Butsykin <pbutsy...@virtuozzo.com>
Added implementation of the qcow2_co_write_compressed function that
will allow us to safely use compressed writes for the qcow2 from running VMs.
Signed-off-by: Pavel Butsykin <pbutsy...@virtuozzo.com>
Signed-off-by: Denis V. Lunev <d...@openvz.org>
CC: Jeff Cody <jc...@redhat.com>
CC: Markus Armbruster <arm...@redhat.com>
CC: Eric Blake <ebl...@redhat.com>
CC: John Snow <js...@redhat.com>
CC: Stefan Hajnoczi <stefa...@redhat.com>
CC: Kevin Wolf <kw...@redhat.com>
---
block/qcow2.c | 89 ++++++++++++++++++++++++++++++++++-------------------------
1 file changed, 52 insertions(+), 37 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index c9306a7..38caa66 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2535,13 +2535,16 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t
offset)
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
-static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors)
+static coroutine_fn int
+qcow2_co_write_compressed(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, QEMUIOVector *qiov)
Is it worth converting to a byte-based qcow2_co_pwrite_compressed()
while at it?
Yes, I'll do it for the next version.
