[PATCH v4 0/2] nbd: MULTI_CONN for shared writable exports

[Eric Blake <eblake@redhat.com>]

v3 was here:
https://lists.gnu.org/archive/html/qemu-devel/2022-03/msg03701.html
with additional review here:
https://lists.gnu.org/archive/html/qemu-devel/2022-05/msg00166.html

Since then:
- patch 1 of v3 applied independently
- patch 3 simplified with beefed up commit message (now unconditional,
  because we have convinced ourselves that all shared clients go
  through a single block backend with no cache inconsistency) [kwolf]
- patch 3 rebase iotest addition to recent iotest improvements
- patch 3 s/7.0/7.1/ to match another slip in time

Eric Blake (2):
  qemu-nbd: Pass max connections to blockdev layer
  nbd/server: Allow MULTI_CONN for shared writable exports

 docs/interop/nbd.txt                          |   1 +
 docs/tools/qemu-nbd.rst                       |   3 +-
 qapi/block-export.json                        |   8 +-
 include/block/nbd.h                           |   5 +-
 blockdev-nbd.c                                |  13 +-
 nbd/server.c                                  |  10 +-
 qemu-nbd.c                                    |   2 +-
 MAINTAINERS                                   |   1 +
 tests/qemu-iotests/tests/nbd-multiconn        | 145 ++++++++++++++++++
 tests/qemu-iotests/tests/nbd-multiconn.out    |   5 +
 .../tests/nbd-qemu-allocation.out             |   2 +-
 11 files changed, 178 insertions(+), 17 deletions(-)
 create mode 100755 tests/qemu-iotests/tests/nbd-multiconn
 create mode 100644 tests/qemu-iotests/tests/nbd-multiconn.out

-- 
2.36.1