From: Maxim Levitsky <mlevi...@redhat.com>
Add scsi_device_get which finds the scsi device
and takes a reference to it.
Suggested-by: Stefan Hajnoczi <stefa...@gmail.com>
Signed-off-by: Maxim Levitsky <mlevi...@redhat.com>
Message-Id: <20200913160259.32145-8-mlevi...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Message-Id: <20201006123904.610658-12-mlevi...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
hw/scsi/scsi-bus.c | 11 +++++++++++
include/hw/scsi/scsi.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index 7599113efe..eda8cb7e70 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -73,6 +73,17 @@ SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int
id, int lun)
return do_scsi_device_find(bus, channel, id, lun, false);
}
+SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int id, int lun)
+{
+ SCSIDevice *d;
+ RCU_READ_LOCK_GUARD();
+ d = do_scsi_device_find(bus, channel, id, lun, false);
+ if (d) {
+ object_ref(d);
+ }
+ return d;
+}
+
static void scsi_device_realize(SCSIDevice *s, Error **errp)
{
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index 7a55cdbd74..09fa5c9d2a 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -190,6 +190,7 @@ int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf,
int len, bool fixed);
int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size,
uint8_t *buf, uint8_t buf_size);
SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
+SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int target, int lun);
/* scsi-generic.c. */
extern const SCSIReqOps scsi_generic_req_ops;
--
2.26.2
