On 28.03.2017 22:51, Max Reitz wrote:
> Having an Error parameter for these functions makes sense because we
> sometimes want a bit more information than just "Something failed". Some
> drivers already use error_report() and the like to emit this additional
> information, so it's rather obvious that we do want a real error object
> here.
> 
> 
> v3:
> - Patch 2: Keep "Could not resize image" message in qcow2_create2() by
>            using error_prepend() [Kevin]
> - Patch 3: Dropped archipelago
> - Patch 4:
>   - Keep errno information where available [Kevin]
>   - Make all drivers generate error messages [Stefan/Eric]
>   - Drop generic error message from bdrv_truncate() [Stefan/Eric]
> 
> 
> Max Reitz (4):
>   block/vhdx: Make vhdx_create() always set errp
>   block: Add errp to b{lk,drv}_truncate()
>   block: Add errp to BD.bdrv_truncate()
>   block: Add .bdrv_truncate() error messages
> 
>  include/block/block.h          |  2 +-
>  include/block/block_int.h      |  2 +-
>  include/sysemu/block-backend.h |  2 +-
>  block.c                        | 16 +++++++++++-----
>  block/blkdebug.c               |  4 ++--
>  block/block-backend.c          |  5 +++--
>  block/commit.c                 |  5 +++--
>  block/crypto.c                 |  5 +++--
>  block/file-posix.c             | 19 +++++++++++++------
>  block/file-win32.c             |  6 +++---
>  block/gluster.c                |  7 +++++--
>  block/iscsi.c                  |  6 ++++--
>  block/mirror.c                 |  2 +-
>  block/nfs.c                    | 12 ++++++++++--
>  block/parallels.c              | 13 ++++++++-----
>  block/qcow.c                   |  6 +++---
>  block/qcow2-refcount.c         |  5 ++++-
>  block/qcow2.c                  | 24 +++++++++++++++---------
>  block/qed.c                    |  8 +++++---
>  block/raw-format.c             |  6 ++++--
>  block/rbd.c                    |  3 ++-
>  block/sheepdog.c               | 14 ++++++--------
>  block/vdi.c                    |  4 ++--
>  block/vhdx-log.c               |  2 +-
>  block/vhdx.c                   | 25 ++++++++++++++++++-------
>  block/vmdk.c                   | 13 +++----------
>  block/vpc.c                    | 13 +++++++------
>  blockdev.c                     | 21 +--------------------
>  qemu-img.c                     | 17 ++++-------------
>  qemu-io-cmds.c                 |  5 +++--
>  30 files changed, 147 insertions(+), 125 deletions(-)

Applied to my block-next branch:

https://github.com/XanClic/qemu/commits/block-next

Max