[PATCH v2 0/4] block/blkio: fix opening virtio-blk drivers

[Stefano Garzarella <sgarzare@redhat.com>]

There is a problem with virtio-blk-vhost-vdpa.
The first patch does some preparation changes. The second and third patches
fix the issues, the last patch tries to prepare QEMU for a future version of
libblkio where we can use blkio_set_fd() to check whether the property is
supported or not.

While testing, I realized that the main problem was that qemu_open() does not
support UDS, but still the problem with blkio_connect() which can fail remains.

v2:
- added first patch in preparation of the others
- reworked patch 2 retrying blkio_connect [Stefan]
- added patch 3 since qemu_open() fails in UDS
- changed patch 4 commit description [Stefan]

v1: https://lore.kernel.org/qemu-devel/20230724154611.178858-1-sgarzare@redhat.com/

Based on stefanha/block branch.

Stefano Garzarella (4):
  block/blkio: move blkio_connect() in the drivers functions
  block/blkio: retry blkio_connect() if it fails using `fd`
  block/blkio: fall back on using `path` when `fd` setting fails
  block/blkio: use blkio_set_int("fd") to check fd support

 block/blkio.c | 108 +++++++++++++++++++++++++++++++++++---------------
 1 file changed, 75 insertions(+), 33 deletions(-)

-- 
2.41.0