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[Qemu-devel] [PATCH 14/16] scsi: Implement 'get_sense' callback
From: |
Hannes Reinecke |
Subject: |
[Qemu-devel] [PATCH 14/16] scsi: Implement 'get_sense' callback |
Date: |
Thu, 18 Nov 2010 15:47:46 +0100 |
User-agent: |
Heirloom mailx 12.2 01/07/07 |
The get_sense callback copies existing sense information into
the provided buffer. Required if sense information should be
transferred together with the command response.
Signed-off-by: Hannes Reinecke <address@hidden>
---
hw/scsi-disk.c | 9 +++++++++
hw/scsi-generic.c | 17 +++++++++++++++++
hw/scsi.h | 1 +
3 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 4353aaf..f9b66ac 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -370,6 +370,14 @@ static uint8_t *scsi_get_buf(SCSIRequest *req)
return r->iov_buf;
}
+/* 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);
@@ -1215,6 +1223,7 @@ 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_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf),
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index f7cf67d..fa03337 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -83,6 +83,22 @@ 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) {
+ if (len < SCSI_SENSE_BUF_SIZE)
+ size = len;
+ else
+ size = SCSI_SENSE_BUF_SIZE;
+ memcpy(outbuf, s->sensebuf, size);
+ }
+
+ return size;
+}
+
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
{
SCSIRequest *req;
@@ -543,6 +559,7 @@ 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(),
diff --git a/hw/scsi.h b/hw/scsi.h
index a41f53e..6c2540e 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -78,6 +78,7 @@ 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);
};
typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
--
1.7.1
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