[Qemu-devel] [PATCH v4 0/6] Provide additional info through qemu-img info

[Max Reitz]

qemu-img info provides only pretty general information about an image.
For any image format, there might be specific options which cannot be
represented in a universal way; for instance, qcow2 provides the
compatibility and lazy_refcount options whose values are certainly
interesting but currently cannot be output by qemu-img info.

Therefore, this series adds a new ImageInfoSpecific union type to
ImageInfo and BlockDriverInfo which may be used by block drivers as a
template for new types dedicated to the specific information they can
provide. It also adds support to qemu-img info and qemu-io -c info to
print the content of these specific structures.

v4:
 - changed dirty "grep -A 42" for grepping all lines until EOF in test
   064 to cleaner "sed -n '//,$p'" (patch 6)
 - rebased on Kevin's block branch (affects line numbers in patches 2, 3
   and 4 as well as the group file change in patch 6)

v3:
 - implemented Fam's remarks:
   - bdrv_get_info already initializes all fields to NULL, no need to do
     this manually (patch 2)
   - implemented bdrv_put_info as a wrapper to
     qapi_free_ImageInfoSpecific, though this may change with further
     extensions to BlockDriverInfo (patch 2)
   - changed one occurence of puts("foo") to printf("foo\n") in order to
     be consistent with the surrounding code (patch 3)
   - other patches (1, 4, 5, 6) remain unmodified

v2:
 - following Eric's recommendation: changed the representation of the
   format specific information from an uninterpreted blobbed string to a
   union of format specific types

Max Reitz (6):
  qapi: Add ImageInfoSpecific type
  block: Add ImageInfoSpecific to BlockDriverInfo
  block/qapi: Human-readable ImageInfoSpecific dump
  qcow2: Add support for ImageInfoSpecific
  qemu-iotests: Discard specific info in _img_info
  qemu-iotests: Additional info from qemu-img info

 block.c                      |  16 +++++-
 block/mirror.c               |  16 ++++--
 block/qapi.c                 | 125 +++++++++++++++++++++++++++++++++++++++++++
 block/qcow2.c                |  12 +++++
 include/block/block.h        |   3 ++
 include/block/qapi.h         |   2 +
 qapi-schema.json             |  34 +++++++++++-
 qemu-img.c                   |   1 +
 qemu-io-cmds.c               |   8 +++
 tests/qemu-iotests/064       |  72 +++++++++++++++++++++++++
 tests/qemu-iotests/064.out   |  22 ++++++++
 tests/qemu-iotests/common.rc |  19 ++++++-
 tests/qemu-iotests/group     |   1 +
 13 files changed, 323 insertions(+), 8 deletions(-)
 create mode 100755 tests/qemu-iotests/064
 create mode 100644 tests/qemu-iotests/064.out

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1.8.3.1