[Qemu-devel] [PATCH v2 0/3] block: pause block jobs for bdrv_drain_begin/end

[John Snow]

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1367369#c8

It's possible to wedge QEMU if the guest tries to reset a virtio-pci
device as QEMU is also using the drive for a blockjob. This patchset
aims to allow us to safely pause/resume jobs attached to individual
nodes in a manner similar to how bdrv_drain_all_begin/end do.

John Snow (3):
  blockjob: add block_job_start_shim
  block-backend: add drained_begin / drained_end ops
  blockjob: add devops to blockjob backends

 block/block-backend.c          | 24 ++++++++++++++++--
 blockjob.c                     | 55 +++++++++++++++++++++++++++++++++---------
 include/sysemu/block-backend.h |  8 ++++++
 3 files changed, 73 insertions(+), 14 deletions(-)

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2.9.3