[Qemu-devel] [PATCH for-4.0 v3 0/6] NBD server alignment improvement

[Eric Blake]

I'm tired of nbdkit being able to trigger an assertion failure
in qemu-img convert.  Let's get this into 4.0-rc2.

Since v2:
- add more patches, including a respin of a separately-posted
nbd/client: Deal with unaligned size from server
- Don't make unaligned sector from server inaccessible; instead,
round our requests down and handle the tail locally
- fix another issue reported by Rich where 'qemu-img map' output
was less than stellar

Eric Blake (6):
  iotests: Add 241 to test NBD on unaligned images
  nbd/client: Lower min_block for block-status, unaligned size
  nbd/client: Report offsets in bdrv_block_status
  nbd/client: Support qemu-img convert from unaligned size
  block: Add bdrv_get_request_alignment()
  nbd/server: Advertise actual minimum block size

 include/sysemu/block-backend.h |  1 +
 block/block-backend.c          |  7 ++++
 block/nbd-client.c             | 48 +++++++++++++++++++++--
 block/nbd.c                    | 19 ++++++++-
 nbd/server.c                   | 13 ++++---
 tests/qemu-iotests/209.out     |  4 +-
 tests/qemu-iotests/223.out     | 18 ++++-----
 tests/qemu-iotests/241         | 70 ++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/241.out     |  8 ++++
 tests/qemu-iotests/group       |  1 +
 10 files changed, 169 insertions(+), 20 deletions(-)
 create mode 100755 tests/qemu-iotests/241
 create mode 100644 tests/qemu-iotests/241.out

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2.20.1