[V2,0/7] block/rbd: migrate to coroutines and add write zeroes support

Message

Peter Lieven Jan. 26, 2021, 11:25 a.m. UTC

this series migrates the qemu rbd driver from the old aio emulation
to native coroutines and adds write zeroes support which is important
for block operations.

To achive this we first bump the librbd requirement to the already
outdated luminous release of ceph to get rid of some wrappers and
ifdef'ry in the code.

V1->V2:
 - this patch is now rebased on top of current master with Paolos
   upcoming fixes for the meson.build script included:
    - meson: accept either shared or static libraries if --disable-static
    - meson: honor --enable-rbd if cc.links test fails
 - Patch 1: adjusted to meson.build script
 - Patch 2: unchanged
 - Patch 3: new patch
 - Patch 4: do not implement empty detach_aio_context callback [Jason]
 - Patch 5: - fix aio completion cleanup in error case [Jason]
            - return error codes from librbd
 - Patch 6: - add support for thick provisioning [Jason]
            - do not set write zeroes alignment
 - Patch 7: new patch

Peter Lieven (7):
  block/rbd: bump librbd requirement to luminous release
  block/rbd: store object_size in BDRVRBDState
  block/rbd: update s->image_size in qemu_rbd_getlength
  block/rbd: add bdrv_attach_aio_context
  block/rbd: migrate from aio to coroutines
  block/rbd: add write zeroes support
  block/rbd: drop qemu_rbd_refresh_limits

 block/rbd.c | 418 +++++++++++++++++-----------------------------------
 meson.build |  13 +-
 2 files changed, 142 insertions(+), 289 deletions(-)