2007-12-24 17:11:51 +01:00
|
|
|
/*
|
|
|
|
* Generic SCSI Device support
|
|
|
|
*
|
|
|
|
* Copyright (c) 2007 Bull S.A.S.
|
|
|
|
* Based on code by Paul Brook
|
|
|
|
* Based on code by Fabrice Bellard
|
|
|
|
*
|
|
|
|
* Written by Laurent Vivier <Laurent.Vivier@bull.net>
|
|
|
|
*
|
2011-06-26 04:21:35 +02:00
|
|
|
* This code is licensed under the LGPL.
|
2007-12-24 17:11:51 +01:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2016-01-26 19:17:16 +01:00
|
|
|
#include "qemu/osdep.h"
|
include/qemu/osdep.h: Don't include qapi/error.h
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-14 09:01:28 +01:00
|
|
|
#include "qapi/error.h"
|
2007-12-24 17:11:51 +01:00
|
|
|
#include "qemu-common.h"
|
2012-12-17 18:20:00 +01:00
|
|
|
#include "qemu/error-report.h"
|
2013-02-05 17:06:20 +01:00
|
|
|
#include "hw/scsi/scsi.h"
|
2014-10-07 13:59:18 +02:00
|
|
|
#include "sysemu/block-backend.h"
|
2012-12-17 18:20:04 +01:00
|
|
|
#include "sysemu/blockdev.h"
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2009-08-31 14:24:04 +02:00
|
|
|
#ifdef __linux__
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
//#define DEBUG_SCSI
|
|
|
|
|
|
|
|
#ifdef DEBUG_SCSI
|
2009-05-13 19:53:17 +02:00
|
|
|
#define DPRINTF(fmt, ...) \
|
|
|
|
do { printf("scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
|
2007-12-24 17:11:51 +01:00
|
|
|
#else
|
2009-05-13 19:53:17 +02:00
|
|
|
#define DPRINTF(fmt, ...) do {} while(0)
|
2007-12-24 17:11:51 +01:00
|
|
|
#endif
|
|
|
|
|
2009-05-13 19:53:17 +02:00
|
|
|
#define BADF(fmt, ...) \
|
|
|
|
do { fprintf(stderr, "scsi-generic: " fmt , ## __VA_ARGS__); } while (0)
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
#include <scsi/sg.h>
|
2013-02-05 17:06:20 +01:00
|
|
|
#include "block/scsi.h"
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2011-10-12 14:53:43 +02:00
|
|
|
#define SG_ERR_DRIVER_TIMEOUT 0x06
|
|
|
|
#define SG_ERR_DRIVER_SENSE 0x08
|
|
|
|
|
|
|
|
#define SG_ERR_DID_OK 0x00
|
|
|
|
#define SG_ERR_DID_NO_CONNECT 0x01
|
|
|
|
#define SG_ERR_DID_BUS_BUSY 0x02
|
|
|
|
#define SG_ERR_DID_TIME_OUT 0x03
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
#ifndef MAX_UINT
|
|
|
|
#define MAX_UINT ((unsigned int)-1)
|
|
|
|
#endif
|
|
|
|
|
2009-11-26 15:33:48 +01:00
|
|
|
typedef struct SCSIGenericReq {
|
|
|
|
SCSIRequest req;
|
2007-12-24 17:11:51 +01:00
|
|
|
uint8_t *buf;
|
|
|
|
int buflen;
|
|
|
|
int len;
|
|
|
|
sg_io_hdr_t io_header;
|
2009-11-26 15:33:48 +01:00
|
|
|
} SCSIGenericReq;
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2011-12-15 13:24:30 +01:00
|
|
|
static void scsi_generic_save_request(QEMUFile *f, SCSIRequest *req)
|
|
|
|
{
|
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
|
|
|
|
|
|
|
qemu_put_sbe32s(f, &r->buflen);
|
|
|
|
if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
|
|
|
assert(!r->req.sg);
|
|
|
|
qemu_put_buffer(f, r->buf, r->req.cmd.xfer);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req)
|
|
|
|
{
|
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
|
|
|
|
|
|
|
qemu_get_sbe32s(f, &r->buflen);
|
|
|
|
if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
|
|
|
assert(!r->req.sg);
|
|
|
|
qemu_get_buffer(f, r->buf, r->req.cmd.xfer);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-04-18 16:01:56 +02:00
|
|
|
static void scsi_free_request(SCSIRequest *req)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-04-18 16:01:56 +02:00
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
|
|
|
|
2011-08-21 05:09:37 +02:00
|
|
|
g_free(r->buf);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Helper function for command completion. */
|
2015-07-19 19:15:26 +02:00
|
|
|
static void scsi_command_complete_noio(SCSIGenericReq *r, int ret)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-08-03 10:49:06 +02:00
|
|
|
int status;
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2015-07-19 19:15:26 +02:00
|
|
|
assert(r->req.aiocb == NULL);
|
|
|
|
|
2014-09-24 10:27:53 +02:00
|
|
|
if (r->req.io_canceled) {
|
2014-09-25 04:20:47 +02:00
|
|
|
scsi_req_cancel_complete(&r->req);
|
2014-09-24 10:27:53 +02:00
|
|
|
goto done;
|
|
|
|
}
|
2011-10-12 14:53:43 +02:00
|
|
|
if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
|
2011-08-03 10:49:07 +02:00
|
|
|
r->req.sense_len = r->io_header.sb_len_wr;
|
2011-10-12 14:53:43 +02:00
|
|
|
}
|
2008-10-17 10:08:56 +02:00
|
|
|
|
2011-04-18 12:53:14 +02:00
|
|
|
if (ret != 0) {
|
|
|
|
switch (ret) {
|
2011-04-18 14:29:16 +02:00
|
|
|
case -EDOM:
|
2011-08-03 10:49:06 +02:00
|
|
|
status = TASK_SET_FULL;
|
2011-04-18 14:29:16 +02:00
|
|
|
break;
|
2011-04-18 12:53:14 +02:00
|
|
|
case -ENOMEM:
|
2011-08-03 10:49:06 +02:00
|
|
|
status = CHECK_CONDITION;
|
2011-08-03 10:49:07 +02:00
|
|
|
scsi_req_build_sense(&r->req, SENSE_CODE(TARGET_FAILURE));
|
2011-04-18 12:53:14 +02:00
|
|
|
break;
|
|
|
|
default:
|
2011-08-03 10:49:06 +02:00
|
|
|
status = CHECK_CONDITION;
|
2011-08-03 10:49:07 +02:00
|
|
|
scsi_req_build_sense(&r->req, SENSE_CODE(IO_ERROR));
|
2011-04-18 12:53:14 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
2011-10-12 14:53:43 +02:00
|
|
|
if (r->io_header.host_status == SG_ERR_DID_NO_CONNECT ||
|
|
|
|
r->io_header.host_status == SG_ERR_DID_BUS_BUSY ||
|
|
|
|
r->io_header.host_status == SG_ERR_DID_TIME_OUT ||
|
|
|
|
(r->io_header.driver_status & SG_ERR_DRIVER_TIMEOUT)) {
|
2011-08-03 10:49:06 +02:00
|
|
|
status = BUSY;
|
2007-12-24 17:11:51 +01:00
|
|
|
BADF("Driver Timeout\n");
|
2011-10-12 14:53:43 +02:00
|
|
|
} else if (r->io_header.host_status) {
|
|
|
|
status = CHECK_CONDITION;
|
|
|
|
scsi_req_build_sense(&r->req, SENSE_CODE(I_T_NEXUS_LOSS));
|
2011-08-03 10:49:06 +02:00
|
|
|
} else if (r->io_header.status) {
|
|
|
|
status = r->io_header.status;
|
2011-08-03 10:49:07 +02:00
|
|
|
} else if (r->io_header.driver_status & SG_ERR_DRIVER_SENSE) {
|
2011-08-03 10:49:06 +02:00
|
|
|
status = CHECK_CONDITION;
|
|
|
|
} else {
|
|
|
|
status = GOOD;
|
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
2008-10-17 10:08:56 +02:00
|
|
|
DPRINTF("Command complete 0x%p tag=0x%x status=%d\n",
|
2011-08-03 10:49:06 +02:00
|
|
|
r, r->req.tag, status);
|
2009-11-26 15:34:00 +01:00
|
|
|
|
2011-08-03 10:49:06 +02:00
|
|
|
scsi_req_complete(&r->req, status);
|
2014-09-24 10:27:53 +02:00
|
|
|
done:
|
2014-09-24 10:27:54 +02:00
|
|
|
scsi_req_unref(&r->req);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
2015-07-19 19:15:26 +02:00
|
|
|
static void scsi_command_complete(void *opaque, int ret)
|
|
|
|
{
|
|
|
|
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
|
|
|
|
|
|
|
|
assert(r->req.aiocb != NULL);
|
|
|
|
r->req.aiocb = NULL;
|
|
|
|
scsi_command_complete_noio(r, ret);
|
|
|
|
}
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
static int execute_command(BlockBackend *blk,
|
2009-11-26 15:33:48 +01:00
|
|
|
SCSIGenericReq *r, int direction,
|
2014-10-07 13:59:15 +02:00
|
|
|
BlockCompletionFunc *complete)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
|
|
|
r->io_header.interface_id = 'S';
|
|
|
|
r->io_header.dxfer_direction = direction;
|
|
|
|
r->io_header.dxferp = r->buf;
|
|
|
|
r->io_header.dxfer_len = r->buflen;
|
2009-11-26 15:33:51 +01:00
|
|
|
r->io_header.cmdp = r->req.cmd.buf;
|
|
|
|
r->io_header.cmd_len = r->req.cmd.len;
|
2011-08-03 10:49:07 +02:00
|
|
|
r->io_header.mx_sb_len = sizeof(r->req.sense);
|
|
|
|
r->io_header.sbp = r->req.sense;
|
2007-12-24 17:11:51 +01:00
|
|
|
r->io_header.timeout = MAX_UINT;
|
|
|
|
r->io_header.usr_ptr = r;
|
|
|
|
r->io_header.flags |= SG_FLAG_DIRECT_IO;
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
r->req.aiocb = blk_aio_ioctl(blk, SG_IO, &r->io_header, complete, r);
|
2013-05-29 14:12:10 +02:00
|
|
|
if (r->req.aiocb == NULL) {
|
|
|
|
return -EIO;
|
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void scsi_read_complete(void * opaque, int ret)
|
|
|
|
{
|
2009-11-26 15:33:48 +01:00
|
|
|
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
|
2011-10-13 10:36:27 +02:00
|
|
|
SCSIDevice *s = r->req.dev;
|
2007-12-24 17:11:51 +01:00
|
|
|
int len;
|
|
|
|
|
2015-07-19 19:15:26 +02:00
|
|
|
assert(r->req.aiocb != NULL);
|
2011-05-25 16:53:46 +02:00
|
|
|
r->req.aiocb = NULL;
|
2015-07-19 19:15:26 +02:00
|
|
|
|
2014-09-24 10:27:53 +02:00
|
|
|
if (ret || r->req.io_canceled) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2007-12-24 17:11:51 +01:00
|
|
|
return;
|
|
|
|
}
|
2015-07-19 19:15:26 +02:00
|
|
|
|
2007-12-24 17:11:51 +01:00
|
|
|
len = r->io_header.dxfer_len - r->io_header.resid;
|
2009-11-26 15:33:48 +01:00
|
|
|
DPRINTF("Data ready tag=0x%x len=%d\n", r->req.tag, len);
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
r->len = -1;
|
2011-05-03 14:15:59 +02:00
|
|
|
if (len == 0) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, 0);
|
|
|
|
return;
|
|
|
|
}
|
2011-10-13 10:36:27 +02:00
|
|
|
|
2015-07-19 19:15:26 +02:00
|
|
|
/* Snoop READ CAPACITY output to set the blocksize. */
|
|
|
|
if (r->req.cmd.buf[0] == READ_CAPACITY_10 &&
|
|
|
|
(ldl_be_p(&r->buf[0]) != 0xffffffffU || s->max_lba == 0)) {
|
|
|
|
s->blocksize = ldl_be_p(&r->buf[4]);
|
|
|
|
s->max_lba = ldl_be_p(&r->buf[0]) & 0xffffffffULL;
|
|
|
|
} else if (r->req.cmd.buf[0] == SERVICE_ACTION_IN_16 &&
|
|
|
|
(r->req.cmd.buf[1] & 31) == SAI_READ_CAPACITY_16) {
|
|
|
|
s->blocksize = ldl_be_p(&r->buf[8]);
|
|
|
|
s->max_lba = ldq_be_p(&r->buf[0]);
|
2011-05-03 14:15:59 +02:00
|
|
|
}
|
2015-07-19 19:15:26 +02:00
|
|
|
blk_set_guest_block_size(s->conf.blk, s->blocksize);
|
|
|
|
|
2015-09-16 17:26:16 +02:00
|
|
|
/* Patch MODE SENSE device specific parameters if the BDS is opened
|
|
|
|
* readonly.
|
|
|
|
*/
|
|
|
|
if ((s->type == TYPE_DISK || s->type == TYPE_TAPE) &&
|
|
|
|
blk_is_read_only(s->conf.blk) &&
|
|
|
|
(r->req.cmd.buf[0] == MODE_SENSE ||
|
|
|
|
r->req.cmd.buf[0] == MODE_SENSE_10) &&
|
|
|
|
(r->req.cmd.buf[1] & 0x8) == 0) {
|
|
|
|
if (r->req.cmd.buf[0] == MODE_SENSE) {
|
|
|
|
r->buf[2] |= 0x80;
|
|
|
|
} else {
|
|
|
|
r->buf[3] |= 0x80;
|
|
|
|
}
|
|
|
|
}
|
2016-05-26 08:15:05 +02:00
|
|
|
if (s->type == TYPE_DISK &&
|
|
|
|
r->req.cmd.buf[0] == INQUIRY &&
|
|
|
|
r->req.cmd.buf[2] == 0xb0) {
|
2016-06-24 00:37:19 +02:00
|
|
|
uint32_t max_transfer =
|
|
|
|
blk_get_max_transfer(s->conf.blk) / s->blocksize;
|
2016-06-24 00:37:12 +02:00
|
|
|
|
2016-06-24 00:37:19 +02:00
|
|
|
assert(max_transfer);
|
|
|
|
stl_be_p(&r->buf[8], max_transfer);
|
2016-06-24 00:37:12 +02:00
|
|
|
/* Also take care of the opt xfer len. */
|
2016-06-24 00:37:19 +02:00
|
|
|
if (ldl_be_p(&r->buf[12]) > max_transfer) {
|
|
|
|
stl_be_p(&r->buf[12], max_transfer);
|
2016-05-26 08:15:05 +02:00
|
|
|
}
|
|
|
|
}
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_req_data(&r->req, len);
|
|
|
|
scsi_req_unref(&r->req);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Read more data from scsi device into buffer. */
|
2011-04-18 12:35:39 +02:00
|
|
|
static void scsi_read_data(SCSIRequest *req)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-04-18 12:35:39 +02:00
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
2011-10-12 12:49:35 +02:00
|
|
|
SCSIDevice *s = r->req.dev;
|
2007-12-24 17:11:51 +01:00
|
|
|
int ret;
|
|
|
|
|
2011-04-18 12:35:39 +02:00
|
|
|
DPRINTF("scsi_read_data 0x%x\n", req->tag);
|
2011-10-25 12:53:35 +02:00
|
|
|
|
|
|
|
/* The request is used as the AIO opaque value, so add a ref. */
|
|
|
|
scsi_req_ref(&r->req);
|
2007-12-24 17:11:51 +01:00
|
|
|
if (r->len == -1) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, 0);
|
2007-12-24 17:11:51 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
ret = execute_command(s->conf.blk, r, SG_DXFER_FROM_DEV,
|
|
|
|
scsi_read_complete);
|
2011-04-18 12:53:14 +02:00
|
|
|
if (ret < 0) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void scsi_write_complete(void * opaque, int ret)
|
|
|
|
{
|
2009-11-26 15:33:48 +01:00
|
|
|
SCSIGenericReq *r = (SCSIGenericReq *)opaque;
|
2011-10-12 12:49:35 +02:00
|
|
|
SCSIDevice *s = r->req.dev;
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
DPRINTF("scsi_write_complete() ret = %d\n", ret);
|
2015-07-19 19:15:26 +02:00
|
|
|
|
|
|
|
assert(r->req.aiocb != NULL);
|
2011-05-25 16:53:46 +02:00
|
|
|
r->req.aiocb = NULL;
|
2015-07-19 19:15:26 +02:00
|
|
|
|
2014-09-24 10:27:53 +02:00
|
|
|
if (ret || r->req.io_canceled) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2007-12-24 17:11:51 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2009-11-26 15:33:51 +01:00
|
|
|
if (r->req.cmd.buf[0] == MODE_SELECT && r->req.cmd.buf[4] == 12 &&
|
2011-10-12 12:49:35 +02:00
|
|
|
s->type == TYPE_TAPE) {
|
|
|
|
s->blocksize = (r->buf[9] << 16) | (r->buf[10] << 8) | r->buf[11];
|
|
|
|
DPRINTF("block size %d\n", s->blocksize);
|
2008-10-17 10:08:56 +02:00
|
|
|
}
|
|
|
|
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Write data to a scsi device. Returns nonzero on failure.
|
|
|
|
The transfer may complete asynchronously. */
|
2011-04-22 09:39:16 +02:00
|
|
|
static void scsi_write_data(SCSIRequest *req)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-04-18 12:35:39 +02:00
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
2011-10-12 12:49:35 +02:00
|
|
|
SCSIDevice *s = r->req.dev;
|
2007-12-24 17:11:51 +01:00
|
|
|
int ret;
|
|
|
|
|
2011-04-18 12:35:39 +02:00
|
|
|
DPRINTF("scsi_write_data 0x%x\n", req->tag);
|
2007-12-24 17:11:51 +01:00
|
|
|
if (r->len == 0) {
|
|
|
|
r->len = r->buflen;
|
2011-04-18 14:59:13 +02:00
|
|
|
scsi_req_data(&r->req, r->len);
|
2011-04-22 09:39:16 +02:00
|
|
|
return;
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
2011-10-25 12:53:35 +02:00
|
|
|
/* The request is used as the AIO opaque value, so add a ref. */
|
|
|
|
scsi_req_ref(&r->req);
|
2014-10-07 13:59:18 +02:00
|
|
|
ret = execute_command(s->conf.blk, r, SG_DXFER_TO_DEV, scsi_write_complete);
|
2011-04-18 12:53:14 +02:00
|
|
|
if (ret < 0) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return a pointer to the data buffer. */
|
2011-04-18 12:35:39 +02:00
|
|
|
static uint8_t *scsi_get_buf(SCSIRequest *req)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-04-18 12:35:39 +02:00
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
|
|
|
|
2007-12-24 17:11:51 +01:00
|
|
|
return r->buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Execute a scsi command. Returns the length of the data expected by the
|
|
|
|
command. This will be Positive for data transfers from the device
|
|
|
|
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
|
|
|
and zero if the command does not transfer any data. */
|
|
|
|
|
2011-04-18 12:35:39 +02:00
|
|
|
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *cmd)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2011-04-18 12:35:39 +02:00
|
|
|
SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);
|
2011-10-12 12:49:35 +02:00
|
|
|
SCSIDevice *s = r->req.dev;
|
2007-12-24 17:11:51 +01:00
|
|
|
int ret;
|
|
|
|
|
2010-09-01 16:33:21 +02:00
|
|
|
#ifdef DEBUG_SCSI
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
for (i = 1; i < r->req.cmd.len; i++) {
|
|
|
|
printf(" 0x%02x", cmd[i]);
|
|
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
}
|
|
|
|
#endif
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2009-11-26 15:33:55 +01:00
|
|
|
if (r->req.cmd.xfer == 0) {
|
2014-12-04 14:12:43 +01:00
|
|
|
g_free(r->buf);
|
2007-12-24 17:11:51 +01:00
|
|
|
r->buflen = 0;
|
|
|
|
r->buf = NULL;
|
2011-10-25 12:53:35 +02:00
|
|
|
/* The request is used as the AIO opaque value, so add a ref. */
|
|
|
|
scsi_req_ref(&r->req);
|
2014-10-07 13:59:18 +02:00
|
|
|
ret = execute_command(s->conf.blk, r, SG_DXFER_NONE,
|
|
|
|
scsi_command_complete);
|
2011-04-18 12:53:14 +02:00
|
|
|
if (ret < 0) {
|
2015-07-19 19:15:26 +02:00
|
|
|
scsi_command_complete_noio(r, ret);
|
2011-04-18 12:53:14 +02:00
|
|
|
return 0;
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-11-26 15:33:55 +01:00
|
|
|
if (r->buflen != r->req.cmd.xfer) {
|
2014-12-04 14:12:43 +01:00
|
|
|
g_free(r->buf);
|
2011-08-21 05:09:37 +02:00
|
|
|
r->buf = g_malloc(r->req.cmd.xfer);
|
2009-11-26 15:33:55 +01:00
|
|
|
r->buflen = r->req.cmd.xfer;
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
memset(r->buf, 0, r->buflen);
|
2009-11-26 15:33:55 +01:00
|
|
|
r->len = r->req.cmd.xfer;
|
2009-11-26 15:33:57 +01:00
|
|
|
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
2007-12-24 17:11:51 +01:00
|
|
|
r->len = 0;
|
2011-04-18 12:35:39 +02:00
|
|
|
return -r->req.cmd.xfer;
|
2011-04-18 16:01:56 +02:00
|
|
|
} else {
|
2011-04-18 12:35:39 +02:00
|
|
|
return r->req.cmd.xfer;
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-01-12 12:29:57 +01:00
|
|
|
static int read_naa_id(const uint8_t *p, uint64_t *p_wwn)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if ((p[1] & 0xF) == 3) {
|
|
|
|
/* NAA designator type */
|
|
|
|
if (p[3] != 8) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
*p_wwn = ldq_be_p(p + 4);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((p[1] & 0xF) == 8) {
|
|
|
|
/* SCSI name string designator type */
|
|
|
|
if (p[3] < 20 || memcmp(&p[4], "naa.", 4)) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (p[3] > 20 && p[24] != ',') {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
*p_wwn = 0;
|
|
|
|
for (i = 8; i < 24; i++) {
|
|
|
|
char c = toupper(p[i]);
|
|
|
|
c -= (c >= '0' && c <= '9' ? '0' : 'A' - 10);
|
|
|
|
*p_wwn = (*p_wwn << 4) | c;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void scsi_generic_read_device_identification(SCSIDevice *s)
|
|
|
|
{
|
|
|
|
uint8_t cmd[6];
|
|
|
|
uint8_t buf[250];
|
|
|
|
uint8_t sensebuf[8];
|
|
|
|
sg_io_hdr_t io_header;
|
|
|
|
int ret;
|
|
|
|
int i, len;
|
|
|
|
|
|
|
|
memset(cmd, 0, sizeof(cmd));
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
|
|
cmd[0] = INQUIRY;
|
|
|
|
cmd[1] = 1;
|
|
|
|
cmd[2] = 0x83;
|
|
|
|
cmd[4] = sizeof(buf);
|
|
|
|
|
|
|
|
memset(&io_header, 0, sizeof(io_header));
|
|
|
|
io_header.interface_id = 'S';
|
|
|
|
io_header.dxfer_direction = SG_DXFER_FROM_DEV;
|
|
|
|
io_header.dxfer_len = sizeof(buf);
|
|
|
|
io_header.dxferp = buf;
|
|
|
|
io_header.cmdp = cmd;
|
|
|
|
io_header.cmd_len = sizeof(cmd);
|
|
|
|
io_header.mx_sb_len = sizeof(sensebuf);
|
|
|
|
io_header.sbp = sensebuf;
|
|
|
|
io_header.timeout = 6000; /* XXX */
|
|
|
|
|
|
|
|
ret = blk_ioctl(s->conf.blk, SG_IO, &io_header);
|
|
|
|
if (ret < 0 || io_header.driver_status || io_header.host_status) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = MIN((buf[2] << 8) | buf[3], sizeof(buf) - 4);
|
|
|
|
for (i = 0; i + 3 <= len; ) {
|
|
|
|
const uint8_t *p = &buf[i + 4];
|
|
|
|
uint64_t wwn;
|
|
|
|
|
|
|
|
if (i + (p[3] + 4) > len) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((p[1] & 0x10) == 0) {
|
|
|
|
/* Associated with the logical unit */
|
|
|
|
if (read_naa_id(p, &wwn) == 0) {
|
|
|
|
s->wwn = wwn;
|
|
|
|
}
|
|
|
|
} else if ((p[1] & 0x10) == 0x10) {
|
|
|
|
/* Associated with the target port */
|
|
|
|
if (read_naa_id(p, &wwn) == 0) {
|
|
|
|
s->port_wwn = wwn;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
i += p[3] + 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
static int get_stream_blocksize(BlockBackend *blk)
|
2008-10-17 10:08:56 +02:00
|
|
|
{
|
|
|
|
uint8_t cmd[6];
|
|
|
|
uint8_t buf[12];
|
|
|
|
uint8_t sensebuf[8];
|
|
|
|
sg_io_hdr_t io_header;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
memset(cmd, 0, sizeof(cmd));
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
|
|
cmd[0] = MODE_SENSE;
|
|
|
|
cmd[4] = sizeof(buf);
|
|
|
|
|
|
|
|
memset(&io_header, 0, sizeof(io_header));
|
|
|
|
io_header.interface_id = 'S';
|
|
|
|
io_header.dxfer_direction = SG_DXFER_FROM_DEV;
|
|
|
|
io_header.dxfer_len = sizeof(buf);
|
|
|
|
io_header.dxferp = buf;
|
|
|
|
io_header.cmdp = cmd;
|
|
|
|
io_header.cmd_len = sizeof(cmd);
|
|
|
|
io_header.mx_sb_len = sizeof(sensebuf);
|
|
|
|
io_header.sbp = sensebuf;
|
|
|
|
io_header.timeout = 6000; /* XXX */
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
ret = blk_ioctl(blk, SG_IO, &io_header);
|
2011-10-12 14:49:48 +02:00
|
|
|
if (ret < 0 || io_header.driver_status || io_header.host_status) {
|
2008-10-17 10:08:56 +02:00
|
|
|
return -1;
|
2011-10-12 14:49:48 +02:00
|
|
|
}
|
2008-10-17 10:08:56 +02:00
|
|
|
return (buf[9] << 16) | (buf[10] << 8) | buf[11];
|
|
|
|
}
|
|
|
|
|
2010-09-06 16:07:33 +02:00
|
|
|
static void scsi_generic_reset(DeviceState *dev)
|
|
|
|
{
|
2011-12-15 21:50:08 +01:00
|
|
|
SCSIDevice *s = SCSI_DEVICE(dev);
|
2010-09-06 16:07:33 +02:00
|
|
|
|
2011-10-12 12:49:35 +02:00
|
|
|
scsi_device_purge_requests(s, SENSE_CODE(RESET));
|
2010-09-06 16:07:33 +02:00
|
|
|
}
|
|
|
|
|
2014-08-12 04:12:55 +02:00
|
|
|
static void scsi_generic_realize(SCSIDevice *s, Error **errp)
|
2007-12-24 17:11:51 +01:00
|
|
|
{
|
2014-04-28 12:14:57 +02:00
|
|
|
int rc;
|
2007-12-24 17:11:51 +01:00
|
|
|
int sg_version;
|
|
|
|
struct sg_scsi_id scsiid;
|
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
if (!s->conf.blk) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "drive property not set");
|
|
|
|
return;
|
2009-08-31 14:24:04 +02:00
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2014-10-07 13:59:18 +02:00
|
|
|
if (blk_get_on_error(s->conf.blk, 0) != BLOCKDEV_ON_ERROR_ENOSPC) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "Device doesn't support drive option werror");
|
|
|
|
return;
|
2010-05-27 20:02:28 +02:00
|
|
|
}
|
2014-10-07 13:59:18 +02:00
|
|
|
if (blk_get_on_error(s->conf.blk, 1) != BLOCKDEV_ON_ERROR_REPORT) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "Device doesn't support drive option rerror");
|
|
|
|
return;
|
2010-05-27 20:02:28 +02:00
|
|
|
}
|
|
|
|
|
2007-12-24 17:11:51 +01:00
|
|
|
/* check we are using a driver managing SG_IO (version 3 and after */
|
2014-10-07 13:59:18 +02:00
|
|
|
rc = blk_ioctl(s->conf.blk, SG_GET_VERSION_NUM, &sg_version);
|
2014-04-28 12:14:57 +02:00
|
|
|
if (rc < 0) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "cannot get SG_IO version number: %s. "
|
|
|
|
"Is this a SCSI device?",
|
|
|
|
strerror(-rc));
|
|
|
|
return;
|
ISCSI: Add SCSI passthrough via scsi-generic to libiscsi
Update iscsi to allow passthrough of SG_IO scsi commands when the iscsi
device is forced to be scsi-generic.
Implement both bdrv_ioctl() and bdrv_aio_ioctl() in the iscsi backend,
emulate the SG_IO ioctl and pass the SCSI commands across to the
iscsi target.
This allows end-to-end passthrough of SCSI all the way from the guest,
to qemu, via scsi-generic, then libiscsi all the way to the iscsi target.
To activate this you need to specify that the iscsi lun should be treated
as a scsi-generic device.
Example:
-device lsi -device scsi-generic,drive=MyISCSI \
-drive file=iscsi://10.1.1.125/iqn.ronnie.test/1,if=none,id=MyISCSI
Note, you can currently not boot a qemu guest from a scsi device.
Note,
This only works when the host is linux, since the emulation relies on
definitions of SG_IO from the scsi-generic implementation in the
linux kernel.
It should be fairly easy to re-implement some structures similar enough
for non-linux hosts to do the same style of passthrough via a fake
scsi generic layer and libiscsi if need be.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-05-25 13:59:01 +02:00
|
|
|
}
|
|
|
|
if (sg_version < 30000) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "scsi generic interface too old");
|
|
|
|
return;
|
2009-08-31 14:24:04 +02:00
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
/* get LUN of the /dev/sg? */
|
2014-10-07 13:59:18 +02:00
|
|
|
if (blk_ioctl(s->conf.blk, SG_GET_SCSI_ID, &scsiid)) {
|
2014-08-12 04:12:55 +02:00
|
|
|
error_setg(errp, "SG_GET_SCSI_ID ioctl failed");
|
|
|
|
return;
|
2009-08-31 14:24:04 +02:00
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
|
|
|
|
/* define device state */
|
2011-10-12 12:49:35 +02:00
|
|
|
s->type = scsiid.scsi_type;
|
|
|
|
DPRINTF("device type %d\n", s->type);
|
2011-11-18 16:32:02 +01:00
|
|
|
|
2011-10-13 10:36:27 +02:00
|
|
|
switch (s->type) {
|
|
|
|
case TYPE_TAPE:
|
2014-10-07 13:59:18 +02:00
|
|
|
s->blocksize = get_stream_blocksize(s->conf.blk);
|
2011-10-12 12:49:35 +02:00
|
|
|
if (s->blocksize == -1) {
|
|
|
|
s->blocksize = 0;
|
|
|
|
}
|
2011-10-13 10:36:27 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* Make a guess for block devices, we'll fix it when the guest sends.
|
|
|
|
* READ CAPACITY. If they don't, they likely would assume these sizes
|
|
|
|
* anyway. (TODO: they could also send MODE SENSE).
|
|
|
|
*/
|
|
|
|
case TYPE_ROM:
|
|
|
|
case TYPE_WORM:
|
|
|
|
s->blocksize = 2048;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
s->blocksize = 512;
|
|
|
|
break;
|
2008-10-17 10:08:56 +02:00
|
|
|
}
|
2011-10-12 12:49:35 +02:00
|
|
|
|
|
|
|
DPRINTF("block size %d\n", s->blocksize);
|
2016-01-12 12:29:57 +01:00
|
|
|
|
|
|
|
scsi_generic_read_device_identification(s);
|
2009-08-31 14:24:04 +02:00
|
|
|
}
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2011-10-12 12:54:31 +02:00
|
|
|
const SCSIReqOps scsi_generic_req_ops = {
|
2011-08-03 10:49:08 +02:00
|
|
|
.size = sizeof(SCSIGenericReq),
|
2011-08-03 10:49:09 +02:00
|
|
|
.free_req = scsi_free_request,
|
|
|
|
.send_command = scsi_send_command,
|
|
|
|
.read_data = scsi_read_data,
|
|
|
|
.write_data = scsi_write_data,
|
|
|
|
.get_buf = scsi_get_buf,
|
2011-12-15 13:24:30 +01:00
|
|
|
.load_request = scsi_generic_load_request,
|
|
|
|
.save_request = scsi_generic_save_request,
|
2011-08-03 10:49:08 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
|
2011-10-12 12:58:31 +02:00
|
|
|
uint8_t *buf, void *hba_private)
|
2011-08-03 10:49:08 +02:00
|
|
|
{
|
2016-06-13 23:57:58 +02:00
|
|
|
return scsi_req_alloc(&scsi_generic_req_ops, d, tag, lun, hba_private);
|
2011-08-03 10:49:08 +02:00
|
|
|
}
|
|
|
|
|
2011-12-08 04:34:16 +01:00
|
|
|
static Property scsi_generic_properties[] = {
|
2014-10-07 13:59:18 +02:00
|
|
|
DEFINE_PROP_DRIVE("drive", SCSIDevice, conf.blk),
|
2011-12-08 04:34:16 +01:00
|
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
|
|
};
|
|
|
|
|
2014-07-16 12:22:26 +02:00
|
|
|
static int scsi_generic_parse_cdb(SCSIDevice *dev, SCSICommand *cmd,
|
|
|
|
uint8_t *buf, void *hba_private)
|
|
|
|
{
|
|
|
|
return scsi_bus_parse_cdb(dev, cmd, buf, hba_private);
|
|
|
|
}
|
|
|
|
|
2011-12-15 21:50:08 +01:00
|
|
|
static void scsi_generic_class_initfn(ObjectClass *klass, void *data)
|
|
|
|
{
|
2011-12-08 04:34:16 +01:00
|
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
2011-12-15 21:50:08 +01:00
|
|
|
SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
|
|
|
|
|
2014-08-12 04:12:55 +02:00
|
|
|
sc->realize = scsi_generic_realize;
|
2011-12-15 21:50:08 +01:00
|
|
|
sc->alloc_req = scsi_new_request;
|
2014-07-16 12:22:26 +02:00
|
|
|
sc->parse_cdb = scsi_generic_parse_cdb;
|
2011-12-08 04:34:16 +01:00
|
|
|
dc->fw_name = "disk";
|
|
|
|
dc->desc = "pass through generic scsi device (/dev/sg*)";
|
|
|
|
dc->reset = scsi_generic_reset;
|
|
|
|
dc->props = scsi_generic_properties;
|
2011-12-15 13:24:30 +01:00
|
|
|
dc->vmsd = &vmstate_scsi_device;
|
2011-12-15 21:50:08 +01:00
|
|
|
}
|
|
|
|
|
2013-01-10 16:19:07 +01:00
|
|
|
static const TypeInfo scsi_generic_info = {
|
2011-12-08 04:34:16 +01:00
|
|
|
.name = "scsi-generic",
|
|
|
|
.parent = TYPE_SCSI_DEVICE,
|
|
|
|
.instance_size = sizeof(SCSIDevice),
|
|
|
|
.class_init = scsi_generic_class_initfn,
|
2009-08-31 14:24:04 +02:00
|
|
|
};
|
2007-12-24 17:11:51 +01:00
|
|
|
|
2012-02-09 15:20:55 +01:00
|
|
|
static void scsi_generic_register_types(void)
|
2009-08-31 14:24:04 +02:00
|
|
|
{
|
2011-12-08 04:34:16 +01:00
|
|
|
type_register_static(&scsi_generic_info);
|
2007-12-24 17:11:51 +01:00
|
|
|
}
|
2012-02-09 15:20:55 +01:00
|
|
|
|
|
|
|
type_init(scsi_generic_register_types)
|
2009-08-31 14:24:04 +02:00
|
|
|
|
2007-12-24 17:11:51 +01:00
|
|
|
#endif /* __linux__ */
|