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authorPeter Lieven <pl@kamp.de>2014-05-30 23:36:47 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2014-06-18 08:47:10 +0200
commitefc6de0d0eb21bbd8fbc90da1faf7dd8ed9f5321 (patch)
treedd2613c96ba44edc642e594f2625fa76d4748a9e /include/qemu-common.h
parentaf44da87e926ff64260b95f4350d338c4fc113ca (diff)
downloadfocaccia-qemu-efc6de0d0eb21bbd8fbc90da1faf7dd8ed9f5321.tar.gz
focaccia-qemu-efc6de0d0eb21bbd8fbc90da1faf7dd8ed9f5321.zip
block/iscsi: handle BUSY condition
this patch adds handling of BUSY status reponse from an iSCSI target.
Currently, we fail with -EIO in case of SCSI_STATUS_BUSY while the
obvious reaction would be to retry the operation after some time.
The retry time is randomly choosen from a range with exponential
growth increasing with each retry.

This patch includes most of the changes by a an upcoming patch
from Stefan Hajnoczi:

 iscsi: implement .bdrv_detach/attach_aio_context()

because I also need the reference to the aio_context for
the retry timer to work. I included the changes to maintain
better mergeability.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/qemu-common.h')
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