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scsi-disk: restruct emulation: READ_TOC 

Move READ_TOC emulation from scsi_send_command() to
scsi_disk_emulate_command().  Add scsi_disk_emulate_read_toc() function
which holds the longisch READ_TOC emulation code.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-11-26 15:34:11 +01:00 committed by Anthony Liguori
parent fc903943f8
commit 02880f4349
1 changed files with 42 additions and 38 deletions
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80
hw/scsi-disk.c
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@ -615,6 +615,42 @@ static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf)
return buflen;
}
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
BlockDriverState *bdrv = req->dev->dinfo->bdrv;
int start_track, format, msf, toclen;
uint64_t nb_sectors;
msf = req->cmd.buf[1] & 2;
format = req->cmd.buf[2] & 0xf;
start_track = req->cmd.buf[6];
bdrv_get_geometry(bdrv, &nb_sectors);
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
nb_sectors /= s->cluster_size;
switch (format) {
case 0:
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
break;
case 1:
/* multi session : only a single session defined */
toclen = 12;
memset(outbuf, 0, 12);
outbuf[1] = 0x0a;
outbuf[2] = 0x01;
outbuf[3] = 0x01;
break;
case 2:
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
break;
default:
return -1;
}
if (toclen > req->cmd.xfer)
toclen = req->cmd.xfer;
return toclen;
}
static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
@ -656,6 +692,11 @@ static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf)
if (buflen < 0)
goto illegal_request;
break;
case READ_TOC:
buflen = scsi_disk_emulate_read_toc(req, outbuf);
if (buflen < 0)
goto illegal_request;
break;
case RESERVE:
if (req->cmd.buf[1] & 1)
goto illegal_request;
@ -823,6 +864,7 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
case ALLOW_MEDIUM_REMOVAL:
case READ_CAPACITY:
case SYNCHRONIZE_CACHE:
case READ_TOC:
rc = scsi_disk_emulate_command(&r->req, outbuf);
if (rc > 0) {
r->iov.iov_len = rc;
@ -851,44 +893,6 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
r->sector_count = len * s->cluster_size;
is_write = 1;
break;
case READ_TOC:
{
int start_track, format, msf, toclen;
msf = buf[1] & 2;
format = buf[2] & 0xf;
start_track = buf[6];
bdrv_get_geometry(s->qdev.dinfo->bdrv, &nb_sectors);
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
nb_sectors /= s->cluster_size;
switch(format) {
case 0:
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track);
break;
case 1:
/* multi session : only a single session defined */
toclen = 12;
memset(outbuf, 0, 12);
outbuf[1] = 0x0a;
outbuf[2] = 0x01;
outbuf[3] = 0x01;
break;
case 2:
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track);
break;
default:
goto error_cmd;
}
if (toclen > 0) {
if (len > toclen)
len = toclen;
r->iov.iov_len = len;
break;
}
error_cmd:
DPRINTF("Read TOC error\n");
goto fail;
}
case 0x46:
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len);
memset(outbuf, 0, 8);