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[SCSI] virtio-scsi: hotplug support for virtio-scsi

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This patch implements the hotplug support for virtio-scsi.
When there is a device attached/detached, the virtio-scsi driver will be
signaled via event virtual queue and it will add/remove the scsi device
in question automatically.

Signed-off-by: Sen Wang <senwang@linux.vnet.ibm.com>
Signed-off-by: Cong Meng <mc@linux.vnet.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Cong Meng
2012-07-05 17:06:43 +08:00
committed by James Bottomley
parent 2bd37f0fde
commit 365a715009
2 changed files with 132 additions and 1 deletions
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9
include/linux/virtio_scsi.h
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@@ -69,6 +69,10 @@ struct virtio_scsi_config {
u32 max_lun;
} __packed;
/* Feature Bits */
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
/* Response codes */
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
@@ -105,6 +109,11 @@ struct virtio_scsi_config {
#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
/* Reasons of transport reset event */
#define VIRTIO_SCSI_EVT_RESET_HARD 0
#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
#define VIRTIO_SCSI_S_SIMPLE 0
#define VIRTIO_SCSI_S_ORDERED 1
#define VIRTIO_SCSI_S_HEAD 2