#include "sysemu.h"
#include "blockdev.h"
#include "block_int.h"
+#include "dma.h"
#ifdef __linux
#include <scsi/sg.h>
r->req.aiocb = NULL;
}
-static uint32_t scsi_init_iovec(SCSIDiskReq *r)
+static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
if (!r->iov.iov_base) {
- r->buflen = SCSI_DMA_BUF_SIZE;
+ r->buflen = size;
r->iov.iov_base = qemu_blockalign(s->qdev.conf.bs, r->buflen);
}
r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
return r->qiov.size / 512;
}
-static void scsi_read_complete(void * opaque, int ret)
+static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req)
+{
+ SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
+
+ qemu_put_be64s(f, &r->sector);
+ qemu_put_be32s(f, &r->sector_count);
+ qemu_put_be32s(f, &r->buflen);
+ if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
+ }
+}
+
+static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
+{
+ SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
+
+ qemu_get_be64s(f, &r->sector);
+ qemu_get_be32s(f, &r->sector_count);
+ qemu_get_be32s(f, &r->buflen);
+ if (r->buflen) {
+ scsi_init_iovec(r, r->buflen);
+ if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
+ }
+ }
+
+ qemu_iovec_init_external(&r->qiov, &r->iov, 1);
+}
+
+static void scsi_flush_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
- int n;
- if (r->req.aiocb != NULL) {
- r->req.aiocb = NULL;
- bdrv_acct_done(s->qdev.conf.bs, &r->acct);
- }
+ bdrv_acct_done(s->qdev.conf.bs, &r->acct);
- if (ret) {
+ if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
- DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
+ scsi_req_complete(&r->req, GOOD);
- n = r->qiov.size / 512;
- r->sector += n;
- r->sector_count -= n;
- scsi_req_data(&r->req, r->qiov.size);
+done:
+ if (!r->req.io_canceled) {
+ scsi_req_unref(&r->req);
+ }
+}
+
+static bool scsi_is_cmd_fua(SCSICommand *cmd)
+{
+ switch (cmd->buf[0]) {
+ case READ_10:
+ case READ_12:
+ case READ_16:
+ case WRITE_10:
+ case WRITE_12:
+ case WRITE_16:
+ return (cmd->buf[1] & 8) != 0;
+
+ case WRITE_VERIFY_10:
+ case WRITE_VERIFY_12:
+ case WRITE_VERIFY_16:
+ return true;
+
+ case READ_6:
+ case WRITE_6:
+ default:
+ return false;
+ }
+}
+
+static void scsi_write_do_fua(SCSIDiskReq *r)
+{
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+
+ if (scsi_is_cmd_fua(&r->req.cmd)) {
+ bdrv_acct_start(s->qdev.conf.bs, &r->acct, 0, BDRV_ACCT_FLUSH);
+ r->req.aiocb = bdrv_aio_flush(s->qdev.conf.bs, scsi_flush_complete, r);
+ return;
+ }
+
+ scsi_req_complete(&r->req, GOOD);
+ if (!r->req.io_canceled) {
+ scsi_req_unref(&r->req);
+ }
+}
+
+static void scsi_dma_complete(void *opaque, int ret)
+{
+ SCSIDiskReq *r = (SCSIDiskReq *)opaque;
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+
+ bdrv_acct_done(s->qdev.conf.bs, &r->acct);
+
+ if (ret < 0) {
+ if (scsi_handle_rw_error(r, -ret)) {
+ goto done;
+ }
+ }
+
+ r->sector += r->sector_count;
+ r->sector_count = 0;
+ if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
+ scsi_write_do_fua(r);
+ return;
+ } else {
+ scsi_req_complete(&r->req, GOOD);
+ }
done:
if (!r->req.io_canceled) {
}
}
-static void scsi_flush_complete(void * opaque, int ret)
+static void scsi_read_complete(void * opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
+ int n;
if (r->req.aiocb != NULL) {
r->req.aiocb = NULL;
}
}
- scsi_req_complete(&r->req, GOOD);
+ DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->qiov.size);
+
+ n = r->qiov.size / 512;
+ r->sector += n;
+ r->sector_count -= n;
+ scsi_req_data(&r->req, r->qiov.size);
done:
if (!r->req.io_canceled) {
return;
}
- n = scsi_init_iovec(r);
- bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
- r->req.aiocb = bdrv_aio_readv(s->qdev.conf.bs, r->sector, &r->qiov, n,
- scsi_read_complete, r);
+ if (r->req.sg) {
+ dma_acct_start(s->qdev.conf.bs, &r->acct, r->req.sg, BDRV_ACCT_READ);
+ r->req.resid -= r->req.sg->size;
+ r->req.aiocb = dma_bdrv_read(s->qdev.conf.bs, r->req.sg, r->sector,
+ scsi_dma_complete, r);
+ } else {
+ n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
+ bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
+ r->req.aiocb = bdrv_aio_readv(s->qdev.conf.bs, r->sector, &r->qiov, n,
+ scsi_read_complete, r);
+ }
}
/*
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
}
- if (ret) {
+ if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
r->sector += n;
r->sector_count -= n;
if (r->sector_count == 0) {
- scsi_req_complete(&r->req, GOOD);
+ scsi_write_do_fua(r);
+ return;
} else {
- scsi_init_iovec(r);
+ scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, r->qiov.size);
scsi_req_data(&r->req, r->qiov.size);
}
return;
}
- n = r->qiov.size / 512;
- if (n) {
- if (s->tray_open) {
- scsi_write_complete(r, -ENOMEDIUM);
- return;
- }
+ if (!r->req.sg && !r->qiov.size) {
+ /* Called for the first time. Ask the driver to send us more data. */
+ scsi_write_complete(r, 0);
+ return;
+ }
+ if (s->tray_open) {
+ scsi_write_complete(r, -ENOMEDIUM);
+ return;
+ }
+
+ if (r->req.sg) {
+ dma_acct_start(s->qdev.conf.bs, &r->acct, r->req.sg, BDRV_ACCT_WRITE);
+ r->req.resid -= r->req.sg->size;
+ r->req.aiocb = dma_bdrv_write(s->qdev.conf.bs, r->req.sg, r->sector,
+ scsi_dma_complete, r);
+ } else {
+ n = r->qiov.size / 512;
bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_WRITE);
r->req.aiocb = bdrv_aio_writev(s->qdev.conf.bs, r->sector, &r->qiov, n,
scsi_write_complete, r);
- } else {
- /* Called for the first time. Ask the driver to send us more data. */
- scsi_write_complete(r, 0);
}
}
case 0x83: /* Device identification page, mandatory */
{
- int max_len = 255 - 8;
- int id_len = strlen(bdrv_get_device_name(s->qdev.conf.bs));
+ const char *str = s->serial ?: bdrv_get_device_name(s->qdev.conf.bs);
+ int max_len = s->serial ? 20 : 255 - 8;
+ int id_len = strlen(str);
if (id_len > max_len) {
id_len = max_len;
outbuf[buflen++] = 0; // reserved
outbuf[buflen++] = id_len; // length of data following
- memcpy(outbuf+buflen, bdrv_get_device_name(s->qdev.conf.bs), id_len);
+ memcpy(outbuf+buflen, str, id_len);
buflen += id_len;
break;
}
: SENSE_CODE(NOT_READY_REMOVAL_PREVENTED));
return -1;
}
- bdrv_eject(s->qdev.conf.bs, !start);
- s->tray_open = !start;
+
+ if (s->tray_open != !start) {
+ bdrv_eject(s->qdev.conf.bs, !start);
+ s->tray_open = !start;
+ }
}
return 0;
}
outbuf = r->iov.iov_base;
switch (req->cmd.buf[0]) {
case TEST_UNIT_READY:
- if (s->tray_open || !bdrv_is_inserted(s->qdev.conf.bs)) {
- goto not_ready;
- }
+ assert(!s->tray_open && bdrv_is_inserted(s->qdev.conf.bs));
break;
case INQUIRY:
buflen = scsi_disk_emulate_inquiry(req, outbuf);
memset(outbuf, 0, 8);
bdrv_get_geometry(s->qdev.conf.bs, &nb_sectors);
if (!nb_sectors) {
- goto not_ready;
+ scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
+ return -1;
}
if ((req->cmd.buf[8] & 1) == 0 && req->cmd.lba) {
goto illegal_request;
memset(outbuf, 0, req->cmd.xfer);
bdrv_get_geometry(s->qdev.conf.bs, &nb_sectors);
if (!nb_sectors) {
- goto not_ready;
+ scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
+ return -1;
}
if ((req->cmd.buf[14] & 1) == 0 && req->cmd.lba) {
goto illegal_request;
buflen = MIN(buflen, req->cmd.xfer);
return buflen;
-not_ready:
- if (s->tray_open || !bdrv_is_inserted(s->qdev.conf.bs)) {
- scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
- } else {
- scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY));
- }
- return -1;
-
illegal_request:
if (r->req.status == -1) {
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
}
#endif
+ switch (command) {
+ case INQUIRY:
+ case MODE_SENSE:
+ case MODE_SENSE_10:
+ case RESERVE:
+ case RESERVE_10:
+ case RELEASE:
+ case RELEASE_10:
+ case START_STOP:
+ case ALLOW_MEDIUM_REMOVAL:
+ case GET_CONFIGURATION:
+ case GET_EVENT_STATUS_NOTIFICATION:
+ case MECHANISM_STATUS:
+ case REQUEST_SENSE:
+ break;
+
+ default:
+ if (s->tray_open || !bdrv_is_inserted(s->qdev.conf.bs)) {
+ scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
+ return 0;
+ }
+ break;
+ }
+
switch (command) {
case TEST_UNIT_READY:
case INQUIRY:
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
+ .load_request = scsi_disk_load_request,
+ .save_request = scsi_disk_save_request,
};
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
case WRITE_VERIFY_10:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
+ /* If we are not using O_DIRECT, we might read stale data from the
+ * host cache if writes were made using other commands than these
+ * ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without
+ * O_DIRECT everything must go through SG_IO.
+ */
+ if (!(s->qdev.conf.bs->open_flags & BDRV_O_NOCACHE)) {
+ break;
+ }
+
/* MMC writing cannot be done via pread/pwrite, because it sometimes
* involves writing beyond the maximum LBA or to negative LBA (lead-in).
* And once you do these writes, reading from the block device is
* seen, but performance usually isn't paramount on optical media. So,
* just make scsi-block operate the same as scsi-generic for them.
*/
- if (s->qdev.type != TYPE_ROM) {
- return scsi_req_alloc(&scsi_disk_reqops, &s->qdev, tag, lun,
- hba_private);
- }
+ if (s->qdev.type == TYPE_ROM) {
+ break;
+ }
+ return scsi_req_alloc(&scsi_disk_reqops, &s->qdev, tag, lun,
+ hba_private);
}
return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
DEFINE_PROP_END_OF_LIST(),
};
+static const VMStateDescription vmstate_scsi_disk_state = {
+ .name = "scsi-disk",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState),
+ VMSTATE_BOOL(media_changed, SCSIDiskState),
+ VMSTATE_BOOL(media_event, SCSIDiskState),
+ VMSTATE_BOOL(eject_request, SCSIDiskState),
+ VMSTATE_BOOL(tray_open, SCSIDiskState),
+ VMSTATE_BOOL(tray_locked, SCSIDiskState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "virtual SCSI disk";
dc->reset = scsi_disk_reset;
dc->props = scsi_hd_properties;
+ dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_hd_info = {
dc->desc = "virtual SCSI CD-ROM";
dc->reset = scsi_disk_reset;
dc->props = scsi_cd_properties;
+ dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_cd_info = {
dc->desc = "SCSI block device passthrough";
dc->reset = scsi_disk_reset;
dc->props = scsi_block_properties;
+ dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_block_info = {
dc->desc = "virtual SCSI disk or CD-ROM (legacy)";
dc->reset = scsi_disk_reset;
dc->props = scsi_disk_properties;
+ dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_disk_info = {
projects / qemu.git / blobdiff