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SCSI: Add disk reset handler

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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>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2010-05-04 14:20:59 +02:00 committed by Anthony Liguori
parent 4c64d5b52e
commit e9447f3571
1 changed files with 27 additions and 8 deletions
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35
hw/scsi-disk.c
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@ -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,