static void scsi_read_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
SCSIDevice *s = r->req.dev;
int len;
r->req.aiocb = NULL;
if (ret || r->req.io_canceled) {
scsi_command_complete(r, ret);
return;
}
len = r->io_header.dxfer_len - r->io_header.resid;
DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
r->len = -1;
if (len == 0) {
scsi_command_complete(r, 0);
} else {
/* Snoop READ CAPACITY output to set the blocksize. */
if (r->req.cmd.buf[0] == READ_CAPACITY_10 &&
(ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) {
s->blocksize = ldl_be_p(&r->buf[4]);
s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL;
} else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 &&
(r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
s->blocksize = ldl_be_p(&r->buf[8]);
s->max_lba = ldq_be_p(&r->buf[0]);
}
blk_set_guest_block_size(s->conf.blk, s->blocksize);
scsi_req_data(&r->req, len);
scsi_req_unref(&r->req);
}
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
SCSIDevice *s = r->req.dev;
DPRINTF("scsi_write_complete() ret = %d\n", ret);
r->req.aiocb = NULL;
if (ret || r->req.io_canceled) {
scsi_command_complete(r, ret);
return;
}
if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
s->type == TYPE_TAPE) {
s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
DPRINTF("block size %d\n", s->blocksize);
}
scsi_command_complete(r, ret);
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIRequest *req)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
SCSIDevice *s = r->req.dev;
int ret;
DPRINTF("scsi_read_data 0x%x\n", req->tag);
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
if (r->len == -1) {
scsi_command_complete(r, 0);
return;
}
ret = execute_command(s->conf.bs, r, SG_DXFER_FROM_DEV, scsi_read_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
}
}
static void scsi_write_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
DPRINTF("scsi_write_complete() ret = %d\n", ret);
r->req.aiocb = NULL;
if (ret) {
DPRINTF("IO error\n");
scsi_command_complete(r, ret);
return;
}
if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
s->qdev.type == TYPE_TAPE) {
s->qdev.blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
DPRINTF("block size %d\n", s->qdev.blocksize);
}
scsi_command_complete(r, ret);
}
static void scsi_read_complete(void * opaque, int ret)
{
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
int len;
r->req.aiocb = NULL;
if (ret) {
DPRINTF("IO error ret %d\n", ret);
scsi_command_complete(r, ret);
return;
}
len = r->io_header.dxfer_len - r->io_header.resid;
DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
r->len = -1;
if (len == 0) {
scsi_command_complete(r, 0);
} else {
scsi_req_data(&r->req, len);
}
}
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
SCSIDevice *s = r->req.dev;
int ret;
DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
r->req.cmd.xfer, cmd[0]);
#ifdef DEBUG_SCSI
{
int i;
for (i = 1; i < r->req.cmd.len; i++) {
printf(" 0x%02x", cmd[i]);
}
printf("\n");
}
#endif
if (r->req.cmd.xfer == 0) {
if (r->buf != NULL)
g_free(r->buf);
r->buflen = 0;
r->buf = NULL;
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
ret = execute_command(s->conf.bs, r, SG_DXFER_NONE, scsi_command_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
return 0;
}
return 0;
}
if (r->buflen != r->req.cmd.xfer) {
if (r->buf != NULL)
g_free(r->buf);
r->buf = g_malloc(r->req.cmd.xfer);
r->buflen = r->req.cmd.xfer;
}
memset(r->buf, 0, r->buflen);
r->len = r->req.cmd.xfer;
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
r->len = 0;
return -r->req.cmd.xfer;
} else {
return r->req.cmd.xfer;
}
}
/* Read more data from scsi device into buffer. */
static void scsi_read_data(SCSIRequest *req)
{
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, r->req.dev);
int ret;
DPRINTF("scsi_read_data 0x%x\n", req->tag);
if (r->len == -1) {
scsi_command_complete(r, 0);
return;
}
if (r->req.cmd.buf[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE)
{
s->senselen = MIN(r->len, s->senselen);
memcpy(r->buf, s->sensebuf, s->senselen);
r->io_header.driver_status = 0;
r->io_header.status = 0;
r->io_header.dxfer_len = s->senselen;
r->len = -1;
DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, s->senselen);
DPRINTF("Sense: %d %d %d %d %d %d %d %d\n",
r->buf[0], r->buf[1], r->buf[2], r->buf[3],
r->buf[4], r->buf[5], r->buf[6], r->buf[7]);
scsi_req_data(&r->req, s->senselen);
/* Clear sensebuf after REQUEST_SENSE */
scsi_clear_sense(s);
return;
}
ret = execute_command(s->bs, r, SG_DXFER_FROM_DEV, scsi_read_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
return;
}
}
/* Write data to a scsi device. Returns nonzero on failure.
The transfer may complete asynchronously. */
static void scsi_write_data(SCSIRequest *req)
{
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
int ret;
DPRINTF("scsi_write_data 0x%x\n", req->tag);
if (r->len == 0) {
r->len = r->buflen;
scsi_req_data(&r->req, r->len);
return;
}
ret = execute_command(s->bs, r, SG_DXFER_TO_DEV, scsi_write_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
}
}
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
{
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
int ret;
if (cmd[0] != REQUEST_SENSE && req->lun != s->lun) {
DPRINTF("Unimplemented LUN %d\n", req->lun);
scsi_set_sense(s, SENSE_CODE(LUN_NOT_SUPPORTED));
r->req.status = CHECK_CONDITION;
scsi_req_complete(&r->req);
return 0;
}
if (-1 == scsi_req_parse(&r->req, cmd)) {
BADF("Unsupported command length, command %x\n", cmd[0]);
scsi_command_complete(r, -EINVAL);
return 0;
}
scsi_req_fixup(&r->req);
DPRINTF("Command: lun=%d tag=0x%x len %zd data=0x%02x", lun, tag,
r->req.cmd.xfer, cmd[0]);
#ifdef DEBUG_SCSI
{
int i;
for (i = 1; i < r->req.cmd.len; i++) {
printf(" 0x%02x", cmd[i]);
}
printf("\n");
}
#endif
if (r->req.cmd.xfer == 0) {
if (r->buf != NULL)
qemu_free(r->buf);
r->buflen = 0;
r->buf = NULL;
ret = execute_command(s->bs, r, SG_DXFER_NONE, scsi_command_complete);
if (ret < 0) {
scsi_command_complete(r, ret);
return 0;
}
return 0;
}
if (r->buflen != r->req.cmd.xfer) {
if (r->buf != NULL)
qemu_free(r->buf);
r->buf = qemu_malloc(r->req.cmd.xfer);
r->buflen = r->req.cmd.xfer;
}
memset(r->buf, 0, r->buflen);
r->len = r->req.cmd.xfer;
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
r->len = 0;
return -r->req.cmd.xfer;
} else {
return r->req.cmd.xfer;
}
}
