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vhost scsi: fix lun reset completion handling

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vhost scsi owns the scsi se_cmd but lio frees the se_cmd->se_tmr
before calling release_cmd, so while with normal cmd completion we
can access the se_cmd from the vhost work, we can't do the same with
se_cmd->se_tmr. This has us copy the tmf response in
vhost_scsi_queue_tm_rsp to our internal vhost-scsi tmf struct for
when it gets sent to the guest from our worker thread.

Fixes: efd838fec1 ("vhost scsi: Add support for LUN resets.")
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/1605887459-3864-1-git-send-email-michael.christie@oracle.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mike Christie 2020-11-20 09:50:59 -06:00 committed by Michael S. Tsirkin
parent 418baf2c28
commit b4fffc177f
1 changed files with 3 additions and 1 deletions
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4
drivers/vhost/scsi.c
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@ -220,6 +220,7 @@ struct vhost_scsi_tmf {
struct list_head queue_entry;
struct se_cmd se_cmd;
u8 scsi_resp;
struct vhost_scsi_inflight *inflight;
struct iovec resp_iov;
int in_iovs;
@ -426,6 +427,7 @@ static void vhost_scsi_queue_tm_rsp(struct se_cmd *se_cmd)
struct vhost_scsi_tmf *tmf = container_of(se_cmd, struct vhost_scsi_tmf,
se_cmd);
tmf->scsi_resp = se_cmd->se_tmr_req->response;
transport_generic_free_cmd(&tmf->se_cmd, 0);
}
@ -1183,7 +1185,7 @@ static void vhost_scsi_tmf_resp_work(struct vhost_work *work)
vwork);
int resp_code;
if (tmf->se_cmd.se_tmr_req->response == TMR_FUNCTION_COMPLETE)
if (tmf->scsi_resp == TMR_FUNCTION_COMPLETE)
resp_code = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
else
resp_code = VIRTIO_SCSI_S_FUNCTION_REJECTED;