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authorPaolo Bonzini <pbonzini@redhat.com>2018-04-05 18:09:51 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2018-04-09 16:36:39 +0200
commit2343be0d7ee8a6e02c2bf99d0243492085c8d399 (patch)
tree9b93823a3f0e4283a7082aec69932d49343d6d6a /hw/scsi
parent37c51741892a89cf5710f5ac231091fb0a6352c7 (diff)
scsi-disk: allow customizing the SCSI version
We would like to have different behavior for passthrough devices depending on the SCSI version they expose. To prepare for that, allow the user of emulated devices to specify the desired SCSI level, and adjust the emulation according to the property value. The next patch will set the level for scsi-block and scsi-generic devices. Based on a patch by Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi')
-rw-r--r--hw/scsi/scsi-disk.c29
-rw-r--r--hw/scsi/scsi-generic.c1
2 files changed, 25 insertions, 5 deletions
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index f8ed8cf2b4..9400b97387 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -825,7 +825,7 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
* block characteristics VPD page by default. Not all of SPC-3
* is actually implemented, but we're good enough.
*/
- outbuf[2] = 5;
+ outbuf[2] = s->qdev.default_scsi_version;
outbuf[3] = 2 | 0x10; /* Format 2, HiSup */
if (buflen > 36) {
@@ -2193,7 +2193,11 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
case READ_12:
case READ_16:
DPRINTF("Read (sector %" PRId64 ", count %u)\n", r->req.cmd.lba, len);
- if (r->req.cmd.buf[1] & 0xe0) {
+ /* Protection information is not supported. For SCSI versions 2 and
+ * older (as determined by snooping the guest's INQUIRY commands),
+ * there is no RD/WR/VRPROTECT, so skip this check in these versions.
+ */
+ if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) {
goto illegal_request;
}
if (!check_lba_range(s, r->req.cmd.lba, len)) {
@@ -2224,7 +2228,7 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
* As far as DMA is concerned, we can treat it the same as a write;
* scsi_block_do_sgio will send VERIFY commands.
*/
- if (r->req.cmd.buf[1] & 0xe0) {
+ if (s->qdev.scsi_version > 2 && (r->req.cmd.buf[1] & 0xe0)) {
goto illegal_request;
}
if (!check_lba_range(s, r->req.cmd.lba, len)) {
@@ -2270,6 +2274,8 @@ static void scsi_disk_reset(DeviceState *dev)
/* reset tray statuses */
s->tray_locked = 0;
s->tray_open = 0;
+
+ s->qdev.scsi_version = s->qdev.default_scsi_version;
}
static void scsi_disk_resize_cb(void *opaque)
@@ -2814,6 +2820,8 @@ static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf)
{
SCSIBlockReq *r = (SCSIBlockReq *)req;
+ SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
+
r->cmd = req->cmd.buf[0];
switch (r->cmd >> 5) {
case 0:
@@ -2839,8 +2847,11 @@ static int32_t scsi_block_dma_command(SCSIRequest *req, uint8_t *buf)
abort();
}
- if (r->cdb1 & 0xe0) {
- /* Protection information is not supported. */
+ /* Protection information is not supported. For SCSI versions 2 and
+ * older (as determined by snooping the guest's INQUIRY commands),
+ * there is no RD/WR/VRPROTECT, so skip this check in these versions.
+ */
+ if (s->qdev.scsi_version > 2 && (req->cmd.buf[1] & 0xe0)) {
scsi_check_condition(&r->req, SENSE_CODE(INVALID_FIELD));
return 0;
}
@@ -2952,6 +2963,8 @@ static Property scsi_hd_properties[] = {
DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
DEFAULT_MAX_IO_SIZE),
DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0),
+ DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
+ 5),
DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState, qdev.conf),
DEFINE_PROP_END_OF_LIST(),
};
@@ -2997,6 +3010,8 @@ static Property scsi_cd_properties[] = {
DEFINE_PROP_UINT16("port_index", SCSIDiskState, port_index, 0),
DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
DEFAULT_MAX_IO_SIZE),
+ DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
+ 5),
DEFINE_PROP_END_OF_LIST(),
};
@@ -3025,6 +3040,8 @@ static Property scsi_block_properties[] = {
DEFINE_PROP_DRIVE("drive", SCSIDiskState, qdev.conf.blk),
DEFINE_PROP_BOOL("share-rw", SCSIDiskState, qdev.conf.share_rw, false),
DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState, rotation_rate, 0),
+ DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
+ 5),
DEFINE_PROP_END_OF_LIST(),
};
@@ -3065,6 +3082,8 @@ static Property scsi_disk_properties[] = {
DEFAULT_MAX_UNMAP_SIZE),
DEFINE_PROP_UINT64("max_io_size", SCSIDiskState, max_io_size,
DEFAULT_MAX_IO_SIZE),
+ DEFINE_PROP_INT32("scsi_version", SCSIDiskState, qdev.default_scsi_version,
+ 5),
DEFINE_PROP_END_OF_LIST(),
};
diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index 4753f8738f..1870085762 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -474,6 +474,7 @@ static void scsi_generic_reset(DeviceState *dev)
{
SCSIDevice *s = SCSI_DEVICE(dev);
+ s->scsi_version = s->default_scsi_version;
scsi_device_purge_requests(s, SENSE_CODE(RESET));
}