This patchset adds reconnect support for vhost-user-scsi. 
At the same time, improve the error messages and silent errors are now reported.
And fix a lost reconnect issue for all vhost-user backend.

Changes for v4:
- Merge
  https://lore.kernel.org/all/20230830045722.611224-1-fengli@smartx.com/ to
  this series.
- Add ERRP_GUARD in vhost_user_scsi_realize;
- Reword the commit messages.

Changes for v3:
- Split the vhost_user_scsi_handle_output to a separate patch;
- Move the started_vu from vhost scsi common header to vhost-user-scsi header;
- Fix a log print error;

Changes for v2:
- Split the v1 patch to small separate patchset;
- New patch for fixing fd leak, which has sent to reviewers in another
  mail;
- Implement the `vhost_user_scsi_handle_output`;
- Add the started_vu safe check;
- Fix error handler;
- Check the inflight before set/get inflight fd.

Li Feng (5):
  vhost-user-common: send get_inflight_fd once
  vhost: move and rename the conn retry times
  vhost-user-scsi: support reconnect to backend
  vhost-user-scsi: start vhost when guest kicks
  vhost-user: fix lost reconnect

 hw/block/vhost-user-blk.c             |   6 +-
 hw/scsi/vhost-scsi-common.c           |  47 ++---
 hw/scsi/vhost-scsi.c                  |   5 +-
 hw/scsi/vhost-user-scsi.c             | 253 +++++++++++++++++++++++---
 hw/virtio/vhost-user-gpio.c           |   5 +-
 hw/virtio/vhost-user.c                |   9 +-
 include/hw/virtio/vhost-scsi-common.h |   2 +-
 include/hw/virtio/vhost-user-scsi.h   |   4 +
 include/hw/virtio/vhost-user.h        |   3 +-
 include/hw/virtio/vhost.h             |   2 +
 10 files changed, 276 insertions(+), 60 deletions(-)

-- 
2.41.0