[PATCH v3 for-4.2 0/4] Better NBD string length handling

[Eric Blake]

This series was originally posted before soft freeze, but then KVM
Forum interfered. I think that patches 1-3 are bug fixes still
appropriate for -rc2 if they get good reviews, but patch 4 is a new
feature and now only appropriate for 5.0.

Since v2:
- Patch 1, 2: new [Vladimir]
- Patch 3: improve error messages and fix a memleak [Vladimir]
- Patch 3: bump name length from 256 to 4k (R-b dropped)
- Patch 4: add R-b, but tweak to defer to 5.0

Eric Blake (4):
  nbd/server: Prefer heap over stack for parsing client names
  bitmap: Enforce maximum bitmap name length
  nbd: Don't send oversize strings
  nbd: Allow description when creating NBD blockdev

 qapi/block-core.json         |  2 +-
 qapi/block.json              |  9 +++++---
 include/block/dirty-bitmap.h |  2 ++
 include/block/nbd.h          | 12 +++++-----
 block/dirty-bitmap.c         | 12 +++++++---
 block/nbd.c                  | 10 +++++++++
 block/qcow2-bitmap.c         |  2 ++
 blockdev-nbd.c               | 14 +++++++++++-
 monitor/hmp-cmds.c           |  4 ++--
 nbd/client.c                 | 18 ++++++++++++---
 nbd/server.c                 | 43 ++++++++++++++++++++++++------------
 qemu-nbd.c                   |  9 ++++++++
 tests/qemu-iotests/223       |  2 +-
 tests/qemu-iotests/223.out   |  1 +
 14 files changed, 106 insertions(+), 34 deletions(-)

-- 
2.21.0