[Qemu-block] [PATCH for-4.0 0/2] NBD block status failures

[Eric Blake]

Rich pointed out some fishy corner-case behavior of qemu in dealing
with a non-compliant NBD server on NBD_CMD_BLOCK_STATUS. Fix a real
bug in qemu-img, as well as teaching NBD to be a bit more tolerant of
buggy servers for more interoperability (be strict in what you
produce, but loose in what you accept).

Eric Blake (2):
  qemu-img: Report bdrv_block_status failures
  nbd: Tolerate some server non-compliance in NBD_CMD_BLOCK_STATUS

 block/nbd-client.c | 21 ++++++++++++++++-----
 qemu-img.c         |  2 ++
 block/trace-events |  1 +
 3 files changed, 19 insertions(+), 5 deletions(-)

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2.20.1