[Qemu-devel] [PATCH 00/12] nbd improvements

[Paolo Bonzini <pbonzini@redhat.com>]

I find nbd quite useful to test migration, but it is limited:
it can only do synchronous operation, it is not safe because it
does not support flush, and it has no discard either.  qemu-nbd
is also limited to 1MB requests, and the nbd block driver does
not take this into account.

Luckily, flush/FUA support is being worked out by upstream,
and discard can also be added with the same framework (patches
1 to 6).

Asynchronous support is also very similar to what sheepdog is
already doing (patches 7 to 12).

Paolo Bonzini (12):
  nbd: support feature negotiation
  nbd: sync API definitions with upstream
  nbd: support NBD_SET_FLAGS ioctl
  nbd: add support for NBD_CMD_FLUSH
  nbd: add support for NBD_CMD_FLAG_FUA
  nbd: support NBD_CMD_TRIM in the server
  sheepdog: add coroutine_fn markers
  add socket_set_block
  sheepdog: move coroutine send/recv function to generic code
  block: add bdrv_co_flush support
  nbd: switch to asynchronous operation
  nbd: split requests

 block.c          |   53 ++++++++++---
 block/nbd.c      |  225 ++++++++++++++++++++++++++++++++++++++++++++--------
 block/sheepdog.c |  235 +++++++-----------------------------------------------
 block_int.h      |    1 +
 cutils.c         |  108 +++++++++++++++++++++++++
 nbd.c            |   80 +++++++++++++++++--
 nbd.h            |   20 ++++-
 oslib-posix.c    |    7 ++
 oslib-win32.c    |    6 ++
 qemu-common.h    |    3 +
 qemu-coroutine.c |   71 ++++++++++++++++
 qemu-coroutine.h |   26 ++++++
 qemu-nbd.c       |   13 ++--
 qemu_socket.h    |    1 +
 14 files changed, 580 insertions(+), 269 deletions(-)

-- 
1.7.6