We already have a lot of bdrv_getlength() fixes in -rc2; so I think
this is still okay for -rc3.

v1 was here (with a typo'd subject line):

Since v1:
- patch 1: fix error message capitalization (Kevin, R-b kept)
- fix locking bug in original patch 2 (Kevin)
- split original patch 2 into two parts: signature update, and
added error checking (Kevin)
- check for unlikely integer overflow before bdrv_truncate (Jeff)

001/5:[0002] [FC] 'vpc: Check failure of bdrv_getlength()'
002/5:[down] 'qcow: Change signature of get_cluster_offset()'
003/5:[0048] [FC] 'qcow: Check failure of bdrv_getlength() and bdrv_truncate()'
004/5:[----] [--] 'qcow2: Drop debugging dump_refcounts()'
005/5:[----] [--] 'qcow2: Check failure of bdrv_getlength()'

Eric Blake (5):
  vpc: Check failure of bdrv_getlength()
  qcow: Change signature of get_cluster_offset()
  qcow: Check failure of bdrv_getlength() and bdrv_truncate()
  qcow2: Drop debugging dump_refcounts()
  qcow2: Check failure of bdrv_getlength()

 block/qcow.c  | 165 ++++++++++++++++++++++++++++++++++------------------------
 block/qcow2.c |  26 ++-------
 block/vpc.c   |   9 +++-
 3 files changed, 110 insertions(+), 90 deletions(-)


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