From 871111d1bf38bc391728793f898527823717ed6d Mon Sep 17 00:00:00 2001 Message-Id: <871111d1bf38bc391728793f898527823717ed6d.1418766606.git.jen@redhat.com> In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com> References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com> From: Fam Zheng Date: Thu, 4 Dec 2014 00:05:12 -0600 Subject: [CHANGE 18/31] qemu-img: Convert by cluster size if target is compressed To: rhvirt-patches@redhat.com, jen@redhat.com RH-Author: Fam Zheng Message-id: <1417651524-18041-19-git-send-email-famz@redhat.com> Patchwork-id: 62691 O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 18/30] qemu-img: Convert by cluster size if target is compressed Bugzilla: 1134283 RH-Acked-by: Jeffrey Cody RH-Acked-by: Markus Armbruster RH-Acked-by: Max Reitz If target block driver forces compression, qemu-img convert needs to write by cluster size as well as "-c" option. Particularly, this applies for converting to VMDK streamOptimized format. Signed-off-by: Fam Zheng Signed-off-by: Stefan Hajnoczi (cherry picked from commit 85f49cad879adfb5c3cbdc47ca3c3b50eb8f40bc) Signed-off-by: Fam Zheng Signed-off-by: Jeff E. Nelson --- include/block/block.h | 4 ++++ qemu-img.c | 1 + 2 files changed, 5 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index 3651bd9..b06a9dc 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -34,6 +34,10 @@ typedef struct BlockDriverInfo { * opened with BDRV_O_UNMAP flag for this to work. */ bool can_write_zeroes_with_unmap; + /* + * True if this block driver only supports compressed writes + */ + bool needs_compressed_writes; } BlockDriverInfo; typedef struct BlockFragInfo { diff --git a/qemu-img.c b/qemu-img.c index f14890f..9c021e7 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1477,6 +1477,7 @@ static int img_convert(int argc, char **argv) goto out; } } else { + compress = compress || bdi.needs_compressed_writes; cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; } -- 2.1.0