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scsi-disk: report media changed via GET EVENT STATUS NOTIFICATION

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This adds support for media change notification via the GET EVENT STATUS
NOTIFICATION command, used by Linux versions 2.6.38 and newer.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-09-13 16:26:51 +02:00 committed by Kevin Wolf
parent ceb792ef29
commit 3c2f7c12c2
1 changed files with 53 additions and 4 deletions
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57
hw/scsi-disk.c
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@ -72,6 +72,7 @@ struct SCSIDiskState
uint32_t removable;
uint64_t max_lba;
bool media_changed;
bool media_event;
QEMUBH *bh;
char *version;
char *serial;
@ -687,11 +688,58 @@ fail:
return -1;
}
static int scsi_get_event_status_notification(SCSIDiskState *s,
SCSIDiskReq *r, uint8_t *outbuf)
static int scsi_event_status_media(SCSIDiskState *s, uint8_t *outbuf)
{
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
return -1;
uint8_t event_code, media_status;
media_status = 0;
if (s->tray_open) {
media_status = MS_TRAY_OPEN;
} else if (bdrv_is_inserted(s->bs)) {
media_status = MS_MEDIA_PRESENT;
}
/* Event notification descriptor */
event_code = MEC_NO_CHANGE;
if (media_status != MS_TRAY_OPEN && s->media_event) {
event_code = MEC_NEW_MEDIA;
s->media_event = false;
}
outbuf[0] = event_code;
outbuf[1] = media_status;
/* These fields are reserved, just clear them. */
outbuf[2] = 0;
outbuf[3] = 0;
return 4;
}
static int scsi_get_event_status_notification(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
int size;
uint8_t *buf = r->req.cmd.buf;
uint8_t notification_class_request = buf[4];
if (s->qdev.type != TYPE_ROM) {
return -1;
}
if ((buf[1] & 1) == 0) {
/* asynchronous */
return -1;
}
size = 4;
outbuf[0] = outbuf[1] = 0;
outbuf[3] = 1 << GESN_MEDIA; /* supported events */
if (notification_class_request & (1 << GESN_MEDIA)) {
outbuf[2] = GESN_MEDIA;
size += scsi_event_status_media(s, &outbuf[size]);
} else {
outbuf[2] = 0x80;
}
stw_be_p(outbuf, size - 4);
return size;
}
static int scsi_get_configuration(SCSIDiskState *s, uint8_t *outbuf)
@ -1442,6 +1490,7 @@ static void scsi_cd_change_media_cb(void *opaque, bool load)
s->media_changed = load;
s->tray_open = !load;
s->qdev.unit_attention = SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM);
s->media_event = true;
}
static bool scsi_cd_is_tray_open(void *opaque)