From e865b795a4b0eaae50745ad7dd694447c72600c9 Mon Sep 17 00:00:00 2001 Message-Id: In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com> References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com> From: Fam Zheng 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 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 RH-Acked-by: Markus Armbruster RH-Acked-by: Max Reitz 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 Signed-off-by: Stefan Hajnoczi (cherry picked from commit ba0ad89e2c3316ce26ca6576a3c5051f91bfc0fe) Signed-off-by: Fam Zheng Signed-off-by: Jeff E. Nelson --- 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