[PATCH v4 00/10] qcow2 check: check some reserved bits and subcluster bitmaps

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Hi all!

Here are some good refactorings and new (qemu-img check) checks for
qcow2.

06  qcow2-refcount: check_refcounts_l2(): check l2_bitmap
      don't fix unallocated cluster with allocated subclusters (no strong opinion how to do it correctly)
      drop Eric's r-b
      keep Kirill's t-b (I believe it still applies, my original task didn't include error fixing)
      define l2_bitmap near l2_entry
      add separate assertion and "break;" for QCOW2_CLUSTER_ZERO_PLAIN
others: add r-b: Hanna


Vladimir Sementsov-Ogievskiy (10):
  qcow2-refcount: improve style of check_refcounts_l2()
  qcow2: compressed read: simplify cluster descriptor passing
  qcow2: introduce qcow2_parse_compressed_l2_entry() helper
  qcow2-refcount: introduce fix_l2_entry_by_zero()
  qcow2-refcount: fix_l2_entry_by_zero(): also zero L2 entry bitmap
  qcow2-refcount: check_refcounts_l2(): check l2_bitmap
  qcow2-refcount: check_refcounts_l2(): check reserved bits
  qcow2-refcount: improve style of check_refcounts_l1()
  qcow2-refcount: check_refcounts_l1(): check reserved bits
  qcow2-refcount: check_refblocks(): add separate message for reserved

 block/qcow2.h          |   7 +-
 block/qcow2-cluster.c  |  20 ++-
 block/qcow2-refcount.c | 324 ++++++++++++++++++++++++++---------------
 block/qcow2.c          |  13 +-
 4 files changed, 236 insertions(+), 128 deletions(-)

-- 
2.29.2