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scsi-disk: separate read_data/write_data implementation for emulate_reqops

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The previous patch only separated the send_command callback.
Use different implementations also for read_data and write_data.
The latter is still unreachable, so it aborts for now.

read_data passes the data buffer that was prepared and completes
the command.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-02-08 10:26:21 +01:00
parent b08d0ea044
commit 314a329906
1 changed files with 25 additions and 11 deletions
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36
hw/scsi-disk.c
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@ -343,13 +343,6 @@ static void scsi_read_data(SCSIRequest *req)
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
bool first;
if (r->sector_count == (uint32_t)-1) {
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
r->sector_count = 0;
r->started = true;
scsi_req_data(&r->req, r->iov.iov_len);
return;
}
DPRINTF("Read sector_count=%d\n", r->sector_count);
if (r->sector_count == 0) {
/* This also clears the sense buffer for REQUEST SENSE. */
@ -1262,6 +1255,28 @@ static int scsi_disk_emulate_start_stop(SCSIDiskReq *r)
return 0;
}
static void scsi_disk_emulate_read_data(SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
int buflen = r->iov.iov_len;
if (buflen) {
DPRINTF("Read buf_len=%zd\n", buflen);
r->iov.iov_len = 0;
r->started = true;
scsi_req_data(&r->req, buflen);
return;
}
/* This also clears the sense buffer for REQUEST SENSE. */
scsi_req_complete(&r->req, GOOD);
}
static void scsi_disk_emulate_write_data(SCSIRequest *req)
{
abort();
}
static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
@ -1532,9 +1547,8 @@ static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
return 0;
}
assert(!r->req.aiocb && r->sector_count == 0);
assert(!r->req.aiocb);
r->iov.iov_len = MIN(buflen, req->cmd.xfer);
r->sector_count = -1;
if (r->iov.iov_len == 0) {
scsi_req_complete(&r->req, GOOD);
}
@ -1785,8 +1799,8 @@ static const SCSIReqOps scsi_disk_emulate_reqops = {
.size = sizeof(SCSIDiskReq),
.free_req = scsi_free_request,
.send_command = scsi_disk_emulate_command,
.read_data = scsi_read_data,
.write_data = scsi_write_data,
.read_data = scsi_disk_emulate_read_data,
.write_data = scsi_disk_emulate_write_data,
.get_buf = scsi_get_buf,
};