[PATCH 0/2] block;scsi-generic: Fix max transfer size calculation

[Dmitry Fomichev]

When a host-managed zoned device is passed through to the
guest system using scsi-generic driver, the maximum i/o size for the
drive at the guest may end up being larger than at the host, causing
i/o errors while accessing the backing zoned drive at the host system.

Two problems prevent correct setting of the maximum i/o transfer size
at the guest in this configuration. One issue is specific to
host-managed zone devices - scsi-generic driver doesn't recognize the
SCSI type of HM-zoned devices. The other problem is that file-posix
code for finding max_segments system value doesn't correctly handle
SG nodes.

The following two patches fix these problems.

Based-on: <20200424084338.26803-16-armbru@redhat.com>

Dmitry Fomichev (2):
  file-posix: Correctly read max_segments of SG nodes
  scsi-generic: Fix HM-zoned device scan

 block/file-posix.c       | 55 +++++++++++++++++++++++-----------------
 hw/scsi/scsi-generic.c   | 10 +++++---
 include/scsi/constants.h |  1 +
 3 files changed, 39 insertions(+), 27 deletions(-)

-- 
2.21.0