From e865b795a4b0eaae50745ad7dd694447c72600c9 Mon Sep 17 00:00:00 2001
Message-Id: <e865b795a4b0eaae50745ad7dd694447c72600c9.1418766606.git.jen@redhat.com>
In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
From: Fam Zheng <famz@redhat.com>
Date: Thu, 4 Dec 2014 00:05:13 -0600
Subject: [CHANGE 19/31] vmdk: Implement .bdrv_write_compressed
To: rhvirt-patches@redhat.com,
jen@redhat.com
RH-Author: Fam Zheng <famz@redhat.com>
Message-id: <1417651524-18041-20-git-send-email-famz@redhat.com>
Patchwork-id: 62692
O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 19/30] vmdk: Implement .bdrv_write_compressed
Bugzilla: 1134283
RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
RH-Acked-by: Markus Armbruster <armbru@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
Add a wrapper function to support "compressed" path in qemu-img convert.
Only support streamOptimized subformat case for now (num_extents == 1
and extent compression is true).
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit ba0ad89e2c3316ce26ca6576a3c5051f91bfc0fe)
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Jeff E. Nelson <jen@redhat.com>
---
block/vmdk.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/block/vmdk.c b/block/vmdk.c
index 4cd2795..157db7e 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1495,6 +1495,19 @@ static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
return ret;
}
+static int vmdk_write_compressed(BlockDriverState *bs,
+ int64_t sector_num,
+ const uint8_t *buf,
+ int nb_sectors)
+{
+ BDRVVmdkState *s = bs->opaque;
+ if (s->num_extents == 1 && s->extents[0].compressed) {
+ return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
+ } else {
+ return -ENOTSUP;
+ }
+}
+
static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors,
@@ -2104,6 +2117,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
+ .bdrv_write_compressed = vmdk_write_compressed,
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
--
2.1.0