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scsi: Implement 'get_sense' callback

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The get_sense callback copies existing sense information into
the provided buffer. This is required if sense information
should be transferred together with the command response.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke 2011-04-18 13:36:02 +02:00 committed by Paolo Bonzini
parent 0c34459b6a
commit 74382217ca
5 changed files with 49 additions and 1 deletions
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9
hw/scsi-bus.c
View File

@ -156,6 +156,15 @@ uint8_t *scsi_req_get_buf(SCSIRequest *req)
return req->dev->info->get_buf(req);
}
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
{
if (req->dev->info->get_sense) {
return req->dev->info->get_sense(req, buf, len);
} else {
return 0;
}
}
int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf)
{
int32_t rc;

11
hw/scsi-disk.c
View File

@ -340,6 +340,14 @@ static uint8_t *scsi_get_buf(SCSIRequest *req)
return (uint8_t *)r->iov.iov_base;
}
/* Copy sense information into the provided buffer */
static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
return scsi_build_sense(s->sense, outbuf, len, len > 14);
}
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
@ -1257,6 +1265,7 @@ static SCSIDeviceInfo scsi_disk_info[] = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.get_sense = scsi_get_sense,
.qdev.props = (Property[]) {
DEFINE_SCSI_DISK_PROPERTIES(),
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false),
@ -1277,6 +1286,7 @@ static SCSIDeviceInfo scsi_disk_info[] = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.get_sense = scsi_get_sense,
.qdev.props = (Property[]) {
DEFINE_SCSI_DISK_PROPERTIES(),
DEFINE_PROP_END_OF_LIST(),
@ -1296,6 +1306,7 @@ static SCSIDeviceInfo scsi_disk_info[] = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.get_sense = scsi_get_sense,
.qdev.props = (Property[]) {
DEFINE_SCSI_DISK_PROPERTIES(),
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false),

18
hw/scsi-generic.c
View File

@ -79,6 +79,23 @@ static void scsi_clear_sense(SCSIGenericState *s)
s->driver_status = 0;
}
static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len)
{
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
int size = SCSI_SENSE_BUF_SIZE;
if (!(s->driver_status & SG_ERR_DRIVER_SENSE)) {
size = scsi_build_sense(SENSE_CODE(NO_SENSE), s->sensebuf,
SCSI_SENSE_BUF_SIZE, 0);
}
if (size > len) {
size = len;
}
memcpy(outbuf, s->sensebuf, size);
return size;
}
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
{
SCSIRequest *req;
@ -535,6 +552,7 @@ static SCSIDeviceInfo scsi_generic_info = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.get_sense = scsi_get_sense,
.qdev.props = (Property[]) {
DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf),
DEFINE_PROP_END_OF_LIST(),

2
hw/scsi.h
View File

@ -80,6 +80,7 @@ struct SCSIDeviceInfo {
int (*write_data)(SCSIRequest *req);
void (*cancel_io)(SCSIRequest *req);
uint8_t *(*get_buf)(SCSIRequest *req);
int (*get_sense)(SCSIRequest *req, uint8_t *buf, int len);
};
struct SCSIBusOps {
@ -155,6 +156,7 @@ void scsi_req_continue(SCSIRequest *req);
void scsi_req_data(SCSIRequest *req, int len);
void scsi_req_complete(SCSIRequest *req);
uint8_t *scsi_req_get_buf(SCSIRequest *req);
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
void scsi_req_abort(SCSIRequest *req, int status);
void scsi_req_cancel(SCSIRequest *req);
void scsi_device_purge_requests(SCSIDevice *sdev);

10
hw/spapr_vscsi.c
View File

@ -450,6 +450,15 @@ static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
uint8_t *cdb = req->iu.srp.cmd.cdb;
int n;
n = scsi_req_get_sense(req->sreq, req->sense, sizeof(req->sense));
if (n) {
req->senselen = n;
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
vscsi_put_req(s, req);
return;
}
dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
cdb[0] = 3;
cdb[1] = 0;
cdb[2] = 0;
@ -522,7 +531,6 @@ static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg)
}
vscsi_send_rsp(s, req, 0, res_in, res_out);
} else if (arg == CHECK_CONDITION) {
dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
vscsi_send_request_sense(s, req);
return;
} else {