[1/5] SCSI: Add disk reset handler

Ensure that pending requests of an SCSI disk are purged on system reset
and also restore max_lba. The latter is no only present in the reset
handler as that one is called after init as well.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hw/scsi-disk.c |   35 +++++++++++++++++++++++++++--------
 1 files changed, 27 insertions(+), 8 deletions(-)

On 05/04/2010 07:20 AM, Jan Kiszka wrote:
> Ensure that pending requests of an SCSI disk are purged on system reset
> and also restore max_lba. The latter is no only present in the reset
> handler as that one is called after init as well.
>
> Signed-off-by: Jan Kiszka<jan.kiszka@siemens.com>
>    

Applied all (including v2 of 5/5).  Thanks.

Regards,

Anthony Liguori

> ---
>   hw/scsi-disk.c |   35 +++++++++++++++++++++++++++--------
>   1 files changed, 27 insertions(+), 8 deletions(-)
>
> diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
> index 77cb1da..b8d805f 100644
> --- a/hw/scsi-disk.c
> +++ b/hw/scsi-disk.c
> @@ -1010,22 +1010,45 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
>       }
>   }
>
> -static void scsi_destroy(SCSIDevice *dev)
> +static void scsi_disk_purge_requests(SCSIDiskState *s)
>   {
> -    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
>       SCSIDiskReq *r;
>
>       while (!QTAILQ_EMPTY(&s->qdev.requests)) {
>           r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests));
> +        if (r->req.aiocb) {
> +            bdrv_aio_cancel(r->req.aiocb);
> +        }
>           scsi_remove_request(r);
>       }
> +}
> +
> +static void scsi_disk_reset(DeviceState *dev)
> +{
> +    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
> +    uint64_t nb_sectors;
> +
> +    scsi_disk_purge_requests(s);
> +
> +    bdrv_get_geometry(s->bs,&nb_sectors);
> +    nb_sectors /= s->cluster_size;
> +    if (nb_sectors) {
> +        nb_sectors--;
> +    }
> +    s->max_lba = nb_sectors;
> +}
> +
> +static void scsi_destroy(SCSIDevice *dev)
> +{
> +    SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
> +
> +    scsi_disk_purge_requests(s);
>       drive_uninit(s->qdev.conf.dinfo);
>   }
>
>   static int scsi_disk_initfn(SCSIDevice *dev)
>   {
>       SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
> -    uint64_t nb_sectors;
>
>       if (!s->qdev.conf.dinfo || !s->qdev.conf.dinfo->bdrv) {
>           error_report("scsi-disk: drive property not set");
> @@ -1046,11 +1069,6 @@ static int scsi_disk_initfn(SCSIDevice *dev)
>       s->cluster_size = s->qdev.blocksize / 512;
>
>       s->qdev.type = TYPE_DISK;
> -    bdrv_get_geometry(s->bs,&nb_sectors);
> -    nb_sectors /= s->cluster_size;
> -    if (nb_sectors)
> -        nb_sectors--;
> -    s->max_lba = nb_sectors;
>       qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s);
>       return 0;
>   }
> @@ -1059,6 +1077,7 @@ static SCSIDeviceInfo scsi_disk_info = {
>       .qdev.name    = "scsi-disk",
>       .qdev.desc    = "virtual scsi disk or cdrom",
>       .qdev.size    = sizeof(SCSIDiskState),
> +    .qdev.reset   = scsi_disk_reset,
>       .init         = scsi_disk_initfn,
>       .destroy      = scsi_destroy,
>       .send_command = scsi_send_command,
>