[Qemu-devel] [PATCH v5 0/6] block/qcow2: Image file option amendment

[Max Reitz]

This series adds support to qemu-img, block and qcow2 for amending image
options on existing image files.

Depends on:
 - option: Add assigned flag to QEMUOptionParameter
 - qcow2-refcount: Snapshot update for zero clusters (series, v3)
 - Add metadata overlap checks (series, v5)

v5:
 - added a new function for emptying a cache (patch 2)
 - fixed rounding for the bitmap size in qcow2_expand_zero_clusters
 - now empties the cache in qcow2_expand_zero_clusters instead of simply
   flushing it
 - factored out assignment check in qcow2_amend_options
 - fixed resizing by moving it to the end of qcow2_amend_options
 - fixed expected test result for resizing in addition to a version
   upgrade

v4:
 - rebased on the metadata overlap check series (and fit to it)
 - split patch 2 into three distinct patches (2, 3 and 4)
 - extended test for zero expansion on backed and inactive backed clusters
   (and fixed according to the metadata overlap check series (i.e.,
   adjusted header length))
 - fixed zero expansion with shared L2 tables

v3:
 - deallocate non-preallocated zero clusters on non-backed images instead
   of zero expanding them
 - qcow2 version downgrade: error out on refcount_order != 4
 - implemented Eric's comments regarding the qemu-img amend and img_amend
   itself

v2:
 - Generally implemented Kevin's comments, especially:
   - Zero cluster expansion for inactive L2 tables
   - Correct handling of preallocated zero clusters
   - More test cases

Max Reitz (6):
  block: Image file option amendment
  qcow2-cache: Empty cache
  qcow2-cluster: Expand zero clusters
  qcow2: Save refcount order in BDRVQcowState
  qcow2: Implement bdrv_amend_options
  qemu-iotest: qcow2 image option amendment

 block.c                    |   8 ++
 block/qcow2-cache.c        |  18 +++
 block/qcow2-cluster.c      | 233 ++++++++++++++++++++++++++++++
 block/qcow2-refcount.c     |  29 ++--
 block/qcow2.c              | 197 ++++++++++++++++++++++++-
 block/qcow2.h              |   8 ++
 include/block/block.h      |   2 +
 include/block/block_int.h  |   3 +
 qemu-img-cmds.hx           |   6 +
 qemu-img.c                 |  84 +++++++++++
 qemu-img.texi              |   5 +
 tests/qemu-iotests/061     | 178 +++++++++++++++++++++++
 tests/qemu-iotests/061.out | 349 +++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/group   |   1 +
 14 files changed, 1106 insertions(+), 15 deletions(-)
 create mode 100755 tests/qemu-iotests/061
 create mode 100644 tests/qemu-iotests/061.out

-- 
1.8.3.1