2011-10-25 16:24:24 +08:00
|
|
|
/*
|
|
|
|
* QEMU Block driver for iSCSI images
|
|
|
|
*
|
|
|
|
* Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
|
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* in the Software without restriction, including without limitation the rights
|
|
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice shall be included in
|
|
|
|
* all copies or substantial portions of the Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
|
|
* THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "config-host.h"
|
|
|
|
|
|
|
|
#include <poll.h>
|
2012-05-22 18:10:05 +08:00
|
|
|
#include <arpa/inet.h>
|
2011-10-25 16:24:24 +08:00
|
|
|
#include "qemu-common.h"
|
2012-12-18 01:20:00 +08:00
|
|
|
#include "qemu/config-file.h"
|
|
|
|
#include "qemu/error-report.h"
|
2012-12-18 01:19:44 +08:00
|
|
|
#include "block/block_int.h"
|
2011-10-25 16:24:24 +08:00
|
|
|
#include "trace.h"
|
2013-02-06 00:06:20 +08:00
|
|
|
#include "block/scsi.h"
|
2013-06-23 23:07:08 +08:00
|
|
|
#include "qemu/iov.h"
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
#include <iscsi/iscsi.h>
|
|
|
|
#include <iscsi/scsi-lowlevel.h>
|
|
|
|
|
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 19:59:01 +08:00
|
|
|
#ifdef __linux__
|
|
|
|
#include <scsi/sg.h>
|
2013-02-06 00:06:20 +08:00
|
|
|
#include <block/scsi.h>
|
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 19:59:01 +08:00
|
|
|
#endif
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
typedef struct IscsiLun {
|
|
|
|
struct iscsi_context *iscsi;
|
|
|
|
int lun;
|
2012-05-25 19:59:01 +08:00
|
|
|
enum scsi_inquiry_peripheral_device_type type;
|
2011-10-25 16:24:24 +08:00
|
|
|
int block_size;
|
2012-05-26 15:41:13 +08:00
|
|
|
uint64_t num_blocks;
|
2012-05-22 17:56:36 +08:00
|
|
|
int events;
|
2012-12-06 17:46:47 +08:00
|
|
|
QEMUTimer *nop_timer;
|
2011-10-25 16:24:24 +08:00
|
|
|
} IscsiLun;
|
|
|
|
|
|
|
|
typedef struct IscsiAIOCB {
|
|
|
|
BlockDriverAIOCB common;
|
|
|
|
QEMUIOVector *qiov;
|
|
|
|
QEMUBH *bh;
|
|
|
|
IscsiLun *iscsilun;
|
|
|
|
struct scsi_task *task;
|
|
|
|
uint8_t *buf;
|
|
|
|
int status;
|
|
|
|
int canceled;
|
2013-02-21 23:15:54 +08:00
|
|
|
int retries;
|
|
|
|
int64_t sector_num;
|
|
|
|
int nb_sectors;
|
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 19:59:01 +08:00
|
|
|
#ifdef __linux__
|
|
|
|
sg_io_hdr_t *ioh;
|
|
|
|
#endif
|
2011-10-25 16:24:24 +08:00
|
|
|
} IscsiAIOCB;
|
|
|
|
|
2012-12-06 17:46:47 +08:00
|
|
|
#define NOP_INTERVAL 5000
|
|
|
|
#define MAX_NOP_FAILURES 3
|
2013-02-21 23:15:54 +08:00
|
|
|
#define ISCSI_CMD_RETRIES 5
|
2012-12-06 17:46:47 +08:00
|
|
|
|
2012-08-19 05:37:31 +08:00
|
|
|
static void
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_bh_cb(void *p)
|
2012-08-19 05:37:31 +08:00
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = p;
|
|
|
|
|
|
|
|
qemu_bh_delete(acb->bh);
|
|
|
|
|
2013-01-23 00:34:29 +08:00
|
|
|
g_free(acb->buf);
|
|
|
|
acb->buf = NULL;
|
|
|
|
|
2012-08-19 05:37:31 +08:00
|
|
|
if (acb->canceled == 0) {
|
|
|
|
acb->common.cb(acb->common.opaque, acb->status);
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:35:49 +08:00
|
|
|
if (acb->task != NULL) {
|
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:37:31 +08:00
|
|
|
qemu_aio_release(acb);
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
static void
|
|
|
|
iscsi_schedule_bh(IscsiAIOCB *acb)
|
2012-08-19 05:37:31 +08:00
|
|
|
{
|
2012-08-19 05:35:49 +08:00
|
|
|
if (acb->bh) {
|
|
|
|
return;
|
|
|
|
}
|
2012-08-19 05:38:03 +08:00
|
|
|
acb->bh = qemu_bh_new(iscsi_bh_cb, acb);
|
2012-08-19 05:37:31 +08:00
|
|
|
qemu_bh_schedule(acb->bh);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static void
|
|
|
|
iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data,
|
|
|
|
void *private_data)
|
|
|
|
{
|
2012-08-19 05:35:49 +08:00
|
|
|
IscsiAIOCB *acb = private_data;
|
|
|
|
|
|
|
|
acb->status = -ECANCELED;
|
|
|
|
iscsi_schedule_bh(acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_aio_cancel(BlockDriverAIOCB *blockacb)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = (IscsiAIOCB *)blockacb;
|
|
|
|
IscsiLun *iscsilun = acb->iscsilun;
|
|
|
|
|
2012-08-19 05:35:49 +08:00
|
|
|
if (acb->status != -EINPROGRESS) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
acb->canceled = 1;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
/* send a task mgmt call to the target to cancel the task on the target */
|
2012-08-15 15:09:54 +08:00
|
|
|
iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
|
2012-08-19 05:35:49 +08:00
|
|
|
iscsi_abort_task_cb, acb);
|
2012-08-19 06:12:39 +08:00
|
|
|
|
2012-08-19 05:35:49 +08:00
|
|
|
while (acb->status == -EINPROGRESS) {
|
|
|
|
qemu_aio_wait();
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2012-10-31 23:34:37 +08:00
|
|
|
static const AIOCBInfo iscsi_aiocb_info = {
|
2011-10-25 16:24:24 +08:00
|
|
|
.aiocb_size = sizeof(IscsiAIOCB),
|
|
|
|
.cancel = iscsi_aio_cancel,
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
static void iscsi_process_read(void *arg);
|
|
|
|
static void iscsi_process_write(void *arg);
|
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_set_events(IscsiLun *iscsilun)
|
|
|
|
{
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
2012-05-22 17:56:36 +08:00
|
|
|
int ev;
|
|
|
|
|
|
|
|
/* We always register a read handler. */
|
|
|
|
ev = POLLIN;
|
|
|
|
ev |= iscsi_which_events(iscsi);
|
|
|
|
if (ev != iscsilun->events) {
|
|
|
|
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi),
|
|
|
|
iscsi_process_read,
|
|
|
|
(ev & POLLOUT) ? iscsi_process_write : NULL,
|
|
|
|
iscsilun);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsilun->events = ev;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_process_read(void *arg)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = arg;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
|
|
|
|
iscsi_service(iscsi, POLLIN);
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_process_write(void *arg)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = arg;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
|
|
|
|
iscsi_service(iscsi, POLLOUT);
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_writev_acb(IscsiAIOCB *acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
static void
|
2012-05-22 18:10:05 +08:00
|
|
|
iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status,
|
2011-10-25 16:24:24 +08:00
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
2012-05-22 18:10:05 +08:00
|
|
|
trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled);
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
g_free(acb->buf);
|
2013-01-23 00:34:29 +08:00
|
|
|
acb->buf = NULL;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
if (acb->canceled != 0) {
|
2011-10-25 16:24:24 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (status != 0) {
|
|
|
|
if (status == SCSI_STATUS_CHECK_CONDITION
|
|
|
|
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
|
|
&& acb->retries-- > 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (iscsi_aio_writev_acb(acb) == 0) {
|
|
|
|
iscsi_set_events(acb->iscsilun);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2012-05-22 18:10:05 +08:00
|
|
|
error_report("Failed to write16 data to iSCSI lun. %s",
|
2011-10-25 16:24:24 +08:00
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_schedule_bh(acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2013-07-11 20:16:25 +08:00
|
|
|
static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun)
|
|
|
|
{
|
|
|
|
return sector * iscsilun->block_size / BDRV_SECTOR_SIZE;
|
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
|
|
|
|
{
|
|
|
|
return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
|
|
|
|
}
|
|
|
|
|
2013-07-11 20:16:27 +08:00
|
|
|
static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors,
|
|
|
|
IscsiLun *iscsilun)
|
|
|
|
{
|
|
|
|
if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size ||
|
|
|
|
(nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) {
|
2013-08-01 05:20:26 +08:00
|
|
|
error_report("iSCSI misaligned request: "
|
|
|
|
"iscsilun->block_size %u, sector_num %" PRIi64
|
|
|
|
", nb_sectors %d",
|
2013-07-11 20:16:27 +08:00
|
|
|
iscsilun->block_size, sector_num, nb_sectors);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_writev_acb(IscsiAIOCB *acb)
|
2011-10-25 16:24:24 +08:00
|
|
|
{
|
2013-02-21 23:15:54 +08:00
|
|
|
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
2011-10-25 16:24:24 +08:00
|
|
|
size_t size;
|
2012-05-22 18:10:05 +08:00
|
|
|
uint32_t num_sectors;
|
|
|
|
uint64_t lba;
|
2012-12-04 03:35:15 +08:00
|
|
|
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
2012-05-22 18:10:05 +08:00
|
|
|
struct iscsi_data data;
|
2012-12-04 03:35:15 +08:00
|
|
|
#endif
|
|
|
|
int ret;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
acb->canceled = 0;
|
2012-08-19 05:35:49 +08:00
|
|
|
acb->bh = NULL;
|
|
|
|
acb->status = -EINPROGRESS;
|
2013-01-23 00:34:29 +08:00
|
|
|
acb->buf = NULL;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
/* this will allow us to get rid of 'buf' completely */
|
2013-02-21 23:15:54 +08:00
|
|
|
size = acb->nb_sectors * BDRV_SECTOR_SIZE;
|
2012-12-04 03:35:15 +08:00
|
|
|
|
|
|
|
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
2012-11-19 22:58:31 +08:00
|
|
|
data.size = MIN(size, acb->qiov->size);
|
|
|
|
|
|
|
|
/* if the iovec only contains one buffer we can pass it directly */
|
|
|
|
if (acb->qiov->niov == 1) {
|
|
|
|
data.data = acb->qiov->iov[0].iov_base;
|
|
|
|
} else {
|
|
|
|
acb->buf = g_malloc(data.size);
|
|
|
|
qemu_iovec_to_buf(acb->qiov, 0, acb->buf, data.size);
|
|
|
|
data.data = acb->buf;
|
|
|
|
}
|
2012-12-04 03:35:15 +08:00
|
|
|
#endif
|
2012-05-22 18:10:05 +08:00
|
|
|
|
|
|
|
acb->task = malloc(sizeof(struct scsi_task));
|
2011-10-25 16:24:24 +08:00
|
|
|
if (acb->task == NULL) {
|
2012-05-22 18:10:05 +08:00
|
|
|
error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
|
|
|
|
"command. %s", iscsi_get_error(iscsi));
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
2012-05-22 18:10:05 +08:00
|
|
|
}
|
|
|
|
memset(acb->task, 0, sizeof(struct scsi_task));
|
|
|
|
|
|
|
|
acb->task->xfer_dir = SCSI_XFER_WRITE;
|
|
|
|
acb->task->cdb_size = 16;
|
|
|
|
acb->task->cdb[0] = 0x8a;
|
2013-02-21 23:15:54 +08:00
|
|
|
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
|
2012-05-22 18:10:05 +08:00
|
|
|
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
|
|
|
|
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);
|
2013-07-11 20:16:25 +08:00
|
|
|
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun);
|
2012-05-22 18:10:05 +08:00
|
|
|
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
|
|
|
|
acb->task->expxferlen = size;
|
|
|
|
|
2012-12-04 03:35:15 +08:00
|
|
|
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
2013-02-21 23:15:54 +08:00
|
|
|
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
|
2012-12-04 03:35:15 +08:00
|
|
|
iscsi_aio_write16_cb,
|
|
|
|
NULL,
|
|
|
|
acb);
|
|
|
|
#else
|
2013-02-21 23:15:54 +08:00
|
|
|
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
|
2012-12-04 03:35:15 +08:00
|
|
|
iscsi_aio_write16_cb,
|
|
|
|
&data,
|
|
|
|
acb);
|
|
|
|
#endif
|
|
|
|
if (ret != 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
2011-10-25 16:24:24 +08:00
|
|
|
g_free(acb->buf);
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2012-12-04 03:35:15 +08:00
|
|
|
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
|
|
|
scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
|
|
|
#endif
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
|
|
|
|
QEMUIOVector *qiov, int nb_sectors,
|
|
|
|
BlockDriverCompletionFunc *cb,
|
|
|
|
void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
IscsiAIOCB *acb;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2013-07-11 20:16:27 +08:00
|
|
|
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
|
|
|
trace_iscsi_aio_writev(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb);
|
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->qiov = qiov;
|
|
|
|
acb->nb_sectors = nb_sectors;
|
|
|
|
acb->sector_num = sector_num;
|
|
|
|
acb->retries = ISCSI_CMD_RETRIES;
|
|
|
|
|
|
|
|
if (iscsi_aio_writev_acb(acb) != 0) {
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
2011-10-25 16:24:24 +08:00
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_readv_acb(IscsiAIOCB *acb);
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static void
|
2012-05-22 18:10:05 +08:00
|
|
|
iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status,
|
2011-10-25 16:24:24 +08:00
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
2012-05-22 18:10:05 +08:00
|
|
|
trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled);
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
if (acb->canceled != 0) {
|
2011-10-25 16:24:24 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
|
|
|
if (status != 0) {
|
2013-02-21 23:15:54 +08:00
|
|
|
if (status == SCSI_STATUS_CHECK_CONDITION
|
|
|
|
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
|
|
&& acb->retries-- > 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (iscsi_aio_readv_acb(acb) == 0) {
|
|
|
|
iscsi_set_events(acb->iscsilun);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2012-05-22 18:10:05 +08:00
|
|
|
error_report("Failed to read16 data from iSCSI lun. %s",
|
2011-10-25 16:24:24 +08:00
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_schedule_bh(acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_readv_acb(IscsiAIOCB *acb)
|
2011-10-25 16:24:24 +08:00
|
|
|
{
|
2013-02-21 23:15:54 +08:00
|
|
|
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
2013-07-11 20:16:26 +08:00
|
|
|
size_t size;
|
2013-02-21 23:15:54 +08:00
|
|
|
uint64_t lba;
|
|
|
|
uint32_t num_sectors;
|
|
|
|
int ret;
|
2012-12-04 03:35:15 +08:00
|
|
|
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
2011-10-25 16:24:24 +08:00
|
|
|
int i;
|
2012-12-04 03:35:15 +08:00
|
|
|
#endif
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
acb->canceled = 0;
|
2012-08-19 05:35:49 +08:00
|
|
|
acb->bh = NULL;
|
|
|
|
acb->status = -EINPROGRESS;
|
2011-10-25 16:24:24 +08:00
|
|
|
acb->buf = NULL;
|
|
|
|
|
2013-07-11 20:16:26 +08:00
|
|
|
size = acb->nb_sectors * BDRV_SECTOR_SIZE;
|
2012-05-22 18:10:05 +08:00
|
|
|
|
|
|
|
acb->task = malloc(sizeof(struct scsi_task));
|
2011-10-25 16:24:24 +08:00
|
|
|
if (acb->task == NULL) {
|
2012-05-22 18:10:05 +08:00
|
|
|
error_report("iSCSI: Failed to allocate task for scsi READ16 "
|
|
|
|
"command. %s", iscsi_get_error(iscsi));
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
2012-05-22 18:10:05 +08:00
|
|
|
}
|
|
|
|
memset(acb->task, 0, sizeof(struct scsi_task));
|
|
|
|
|
|
|
|
acb->task->xfer_dir = SCSI_XFER_READ;
|
2013-07-11 20:16:26 +08:00
|
|
|
acb->task->expxferlen = size;
|
2013-02-21 23:15:54 +08:00
|
|
|
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
|
2013-07-11 20:16:26 +08:00
|
|
|
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun);
|
2012-05-22 18:10:05 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
switch (acb->iscsilun->type) {
|
2012-05-22 18:10:05 +08:00
|
|
|
case TYPE_DISK:
|
|
|
|
acb->task->cdb_size = 16;
|
|
|
|
acb->task->cdb[0] = 0x88;
|
|
|
|
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
|
|
|
|
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);
|
|
|
|
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
acb->task->cdb_size = 10;
|
|
|
|
acb->task->cdb[0] = 0x28;
|
|
|
|
*(uint32_t *)&acb->task->cdb[2] = htonl(lba);
|
|
|
|
*(uint16_t *)&acb->task->cdb[7] = htons(num_sectors);
|
|
|
|
break;
|
|
|
|
}
|
2012-11-17 21:37:39 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
|
2012-12-04 03:35:15 +08:00
|
|
|
iscsi_aio_read16_cb,
|
|
|
|
NULL,
|
|
|
|
acb);
|
|
|
|
if (ret != 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2012-12-04 03:35:15 +08:00
|
|
|
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
|
|
|
scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
|
|
|
#else
|
2011-10-25 16:24:24 +08:00
|
|
|
for (i = 0; i < acb->qiov->niov; i++) {
|
|
|
|
scsi_task_add_data_in_buffer(acb->task,
|
|
|
|
acb->qiov->iov[i].iov_len,
|
|
|
|
acb->qiov->iov[i].iov_base);
|
|
|
|
}
|
2012-12-04 03:35:15 +08:00
|
|
|
#endif
|
2013-02-21 23:15:54 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
|
|
|
|
QEMUIOVector *qiov, int nb_sectors,
|
|
|
|
BlockDriverCompletionFunc *cb,
|
|
|
|
void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
|
2013-07-11 20:16:27 +08:00
|
|
|
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
|
|
|
trace_iscsi_aio_readv(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb);
|
|
|
|
|
|
|
|
acb->nb_sectors = nb_sectors;
|
|
|
|
acb->sector_num = sector_num;
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->qiov = qiov;
|
|
|
|
acb->retries = ISCSI_CMD_RETRIES;
|
|
|
|
|
|
|
|
if (iscsi_aio_readv_acb(acb) != 0) {
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
iscsi_set_events(iscsilun);
|
2011-10-25 16:24:24 +08:00
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_flush_acb(IscsiAIOCB *acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
static void
|
|
|
|
iscsi_synccache10_cb(struct iscsi_context *iscsi, int status,
|
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
if (acb->canceled != 0) {
|
2011-10-25 16:24:24 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (status != 0) {
|
|
|
|
if (status == SCSI_STATUS_CHECK_CONDITION
|
|
|
|
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
|
|
&& acb->retries-- > 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (iscsi_aio_flush_acb(acb) == 0) {
|
|
|
|
iscsi_set_events(acb->iscsilun);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
error_report("Failed to sync10 data on iSCSI lun. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_schedule_bh(acb);
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int
|
|
|
|
iscsi_aio_flush_acb(IscsiAIOCB *acb)
|
2011-10-25 16:24:24 +08:00
|
|
|
{
|
2013-02-21 23:15:54 +08:00
|
|
|
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
acb->canceled = 0;
|
2012-08-19 05:35:49 +08:00
|
|
|
acb->bh = NULL;
|
|
|
|
acb->status = -EINPROGRESS;
|
2013-01-23 00:34:29 +08:00
|
|
|
acb->buf = NULL;
|
2011-10-25 16:24:24 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
acb->task = iscsi_synchronizecache10_task(iscsi, acb->iscsilun->lun,
|
2011-10-25 16:24:24 +08:00
|
|
|
0, 0, 0, 0,
|
|
|
|
iscsi_synccache10_cb,
|
|
|
|
acb);
|
|
|
|
if (acb->task == NULL) {
|
|
|
|
error_report("iSCSI: Failed to send synchronizecache10 command. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_flush(BlockDriverState *bs,
|
|
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
|
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->retries = ISCSI_CMD_RETRIES;
|
|
|
|
|
|
|
|
if (iscsi_aio_flush_acb(acb) != 0) {
|
2011-10-25 16:24:24 +08:00
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
|
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int iscsi_aio_discard_acb(IscsiAIOCB *acb);
|
|
|
|
|
2012-04-24 14:29:04 +08:00
|
|
|
static void
|
|
|
|
iscsi_unmap_cb(struct iscsi_context *iscsi, int status,
|
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
if (acb->canceled != 0) {
|
2012-04-24 14:29:04 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (status != 0) {
|
|
|
|
if (status == SCSI_STATUS_CHECK_CONDITION
|
|
|
|
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
|
|
&& acb->retries-- > 0) {
|
2013-05-31 19:47:08 +08:00
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
acb->task = NULL;
|
2013-02-21 23:15:54 +08:00
|
|
|
if (iscsi_aio_discard_acb(acb) == 0) {
|
|
|
|
iscsi_set_events(acb->iscsilun);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
2012-04-24 14:29:04 +08:00
|
|
|
error_report("Failed to unmap data on iSCSI lun. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_schedule_bh(acb);
|
2012-04-24 14:29:04 +08:00
|
|
|
}
|
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
static int iscsi_aio_discard_acb(IscsiAIOCB *acb) {
|
|
|
|
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
2012-04-24 14:29:04 +08:00
|
|
|
struct unmap_list list[1];
|
|
|
|
|
|
|
|
acb->canceled = 0;
|
2012-08-19 05:35:49 +08:00
|
|
|
acb->bh = NULL;
|
|
|
|
acb->status = -EINPROGRESS;
|
2013-01-23 00:34:29 +08:00
|
|
|
acb->buf = NULL;
|
2012-04-24 14:29:04 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
list[0].lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
|
|
|
|
list[0].num = acb->nb_sectors * BDRV_SECTOR_SIZE / acb->iscsilun->block_size;
|
2012-04-24 14:29:04 +08:00
|
|
|
|
2013-02-21 23:15:54 +08:00
|
|
|
acb->task = iscsi_unmap_task(iscsi, acb->iscsilun->lun,
|
2012-04-24 14:29:04 +08:00
|
|
|
0, 0, &list[0], 1,
|
|
|
|
iscsi_unmap_cb,
|
|
|
|
acb);
|
|
|
|
if (acb->task == NULL) {
|
|
|
|
error_report("iSCSI: Failed to send unmap command. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
2013-02-21 23:15:54 +08:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *
|
|
|
|
iscsi_aio_discard(BlockDriverState *bs,
|
|
|
|
int64_t sector_num, int nb_sectors,
|
|
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
|
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->nb_sectors = nb_sectors;
|
|
|
|
acb->sector_num = sector_num;
|
|
|
|
acb->retries = ISCSI_CMD_RETRIES;
|
|
|
|
|
|
|
|
if (iscsi_aio_discard_acb(acb) != 0) {
|
2012-04-24 14:29:04 +08:00
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
|
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
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 19:59:01 +08:00
|
|
|
#ifdef __linux__
|
|
|
|
static void
|
|
|
|
iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status,
|
|
|
|
void *command_data, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
|
2013-06-23 23:07:08 +08:00
|
|
|
g_free(acb->buf);
|
|
|
|
acb->buf = NULL;
|
|
|
|
|
2012-08-19 06:12:39 +08:00
|
|
|
if (acb->canceled != 0) {
|
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 19:59:01 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->status = 0;
|
|
|
|
if (status < 0) {
|
|
|
|
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
acb->status = -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->ioh->driver_status = 0;
|
|
|
|
acb->ioh->host_status = 0;
|
|
|
|
acb->ioh->resid = 0;
|
|
|
|
|
|
|
|
#define SG_ERR_DRIVER_SENSE 0x08
|
|
|
|
|
|
|
|
if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) {
|
|
|
|
int ss;
|
|
|
|
|
|
|
|
acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE;
|
|
|
|
|
|
|
|
acb->ioh->sb_len_wr = acb->task->datain.size - 2;
|
|
|
|
ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ?
|
|
|
|
acb->ioh->mx_sb_len : acb->ioh->sb_len_wr;
|
|
|
|
memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
|
|
|
|
}
|
|
|
|
|
2012-08-19 05:38:03 +08:00
|
|
|
iscsi_schedule_bh(acb);
|
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 19:59:01 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
|
|
|
|
unsigned long int req, void *buf,
|
|
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
struct iscsi_data data;
|
|
|
|
IscsiAIOCB *acb;
|
|
|
|
|
|
|
|
assert(req == SG_IO);
|
|
|
|
|
2012-10-31 23:34:37 +08:00
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
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 19:59:01 +08:00
|
|
|
|
|
|
|
acb->iscsilun = iscsilun;
|
|
|
|
acb->canceled = 0;
|
2012-08-19 05:35:49 +08:00
|
|
|
acb->bh = NULL;
|
|
|
|
acb->status = -EINPROGRESS;
|
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 19:59:01 +08:00
|
|
|
acb->buf = NULL;
|
|
|
|
acb->ioh = buf;
|
|
|
|
|
|
|
|
acb->task = malloc(sizeof(struct scsi_task));
|
|
|
|
if (acb->task == NULL) {
|
|
|
|
error_report("iSCSI: Failed to allocate task for scsi command. %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
memset(acb->task, 0, sizeof(struct scsi_task));
|
|
|
|
|
|
|
|
switch (acb->ioh->dxfer_direction) {
|
|
|
|
case SG_DXFER_TO_DEV:
|
|
|
|
acb->task->xfer_dir = SCSI_XFER_WRITE;
|
|
|
|
break;
|
|
|
|
case SG_DXFER_FROM_DEV:
|
|
|
|
acb->task->xfer_dir = SCSI_XFER_READ;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
acb->task->xfer_dir = SCSI_XFER_NONE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
acb->task->cdb_size = acb->ioh->cmd_len;
|
|
|
|
memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
|
|
|
|
acb->task->expxferlen = acb->ioh->dxfer_len;
|
|
|
|
|
2013-06-23 23:07:08 +08:00
|
|
|
data.size = 0;
|
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 19:59:01 +08:00
|
|
|
if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
|
2013-06-23 23:07:08 +08:00
|
|
|
if (acb->ioh->iovec_count == 0) {
|
|
|
|
data.data = acb->ioh->dxferp;
|
|
|
|
data.size = acb->ioh->dxfer_len;
|
|
|
|
} else {
|
|
|
|
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
|
|
|
scsi_task_set_iov_out(acb->task,
|
|
|
|
(struct scsi_iovec *) acb->ioh->dxferp,
|
|
|
|
acb->ioh->iovec_count);
|
|
|
|
#else
|
|
|
|
struct iovec *iov = (struct iovec *)acb->ioh->dxferp;
|
|
|
|
|
|
|
|
acb->buf = g_malloc(acb->ioh->dxfer_len);
|
|
|
|
data.data = acb->buf;
|
|
|
|
data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0,
|
|
|
|
acb->buf, acb->ioh->dxfer_len);
|
|
|
|
#endif
|
|
|
|
}
|
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 19:59:01 +08:00
|
|
|
}
|
2013-06-23 23:07:08 +08:00
|
|
|
|
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 19:59:01 +08:00
|
|
|
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
|
|
|
|
iscsi_aio_ioctl_cb,
|
2013-06-23 23:07:08 +08:00
|
|
|
(data.size > 0) ? &data : NULL,
|
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 19:59:01 +08:00
|
|
|
acb) != 0) {
|
|
|
|
scsi_free_scsi_task(acb->task);
|
|
|
|
qemu_aio_release(acb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* tell libiscsi to read straight into the buffer we got from ioctl */
|
|
|
|
if (acb->task->xfer_dir == SCSI_XFER_READ) {
|
2013-06-23 23:07:08 +08:00
|
|
|
if (acb->ioh->iovec_count == 0) {
|
|
|
|
scsi_task_add_data_in_buffer(acb->task,
|
|
|
|
acb->ioh->dxfer_len,
|
|
|
|
acb->ioh->dxferp);
|
|
|
|
} else {
|
|
|
|
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
|
|
|
scsi_task_set_iov_in(acb->task,
|
|
|
|
(struct scsi_iovec *) acb->ioh->dxferp,
|
|
|
|
acb->ioh->iovec_count);
|
|
|
|
#else
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < acb->ioh->iovec_count; i++) {
|
|
|
|
struct iovec *iov = (struct iovec *)acb->ioh->dxferp;
|
|
|
|
|
|
|
|
scsi_task_add_data_in_buffer(acb->task,
|
|
|
|
iov[i].iov_len,
|
|
|
|
iov[i].iov_base);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
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 19:59:01 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
|
|
|
|
return &acb->common;
|
|
|
|
}
|
|
|
|
|
2012-08-31 08:28:40 +08:00
|
|
|
|
|
|
|
static void ioctl_cb(void *opaque, int status)
|
|
|
|
{
|
|
|
|
int *p_status = opaque;
|
|
|
|
*p_status = status;
|
|
|
|
}
|
|
|
|
|
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 19:59:01 +08:00
|
|
|
static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
2012-08-31 08:28:40 +08:00
|
|
|
int status;
|
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 19:59:01 +08:00
|
|
|
|
|
|
|
switch (req) {
|
|
|
|
case SG_GET_VERSION_NUM:
|
|
|
|
*(int *)buf = 30000;
|
|
|
|
break;
|
|
|
|
case SG_GET_SCSI_ID:
|
|
|
|
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
|
|
|
|
break;
|
2012-08-31 08:28:40 +08:00
|
|
|
case SG_IO:
|
|
|
|
status = -EINPROGRESS;
|
|
|
|
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status);
|
|
|
|
|
|
|
|
while (status == -EINPROGRESS) {
|
|
|
|
qemu_aio_wait();
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
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 19:59:01 +08:00
|
|
|
default:
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static int64_t
|
|
|
|
iscsi_getlength(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
int64_t len;
|
|
|
|
|
|
|
|
len = iscsilun->num_blocks;
|
|
|
|
len *= iscsilun->block_size;
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
static int parse_chap(struct iscsi_context *iscsi, const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *user = NULL;
|
|
|
|
const char *password = NULL;
|
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
|
|
if (!list) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
opts = qemu_opts_find(list, target);
|
|
|
|
if (opts == NULL) {
|
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
if (!opts) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
user = qemu_opt_get(opts, "user");
|
|
|
|
if (!user) {
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
password = qemu_opt_get(opts, "password");
|
|
|
|
if (!password) {
|
|
|
|
error_report("CHAP username specified but no password was given");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
|
|
|
error_report("Failed to set initiator username and password");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void parse_header_digest(struct iscsi_context *iscsi, const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *digest = NULL;
|
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
|
|
if (!list) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
opts = qemu_opts_find(list, target);
|
|
|
|
if (opts == NULL) {
|
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
if (!opts) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
digest = qemu_opt_get(opts, "header-digest");
|
|
|
|
if (!digest) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(digest, "CRC32C")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C);
|
|
|
|
} else if (!strcmp(digest, "NONE")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE);
|
|
|
|
} else if (!strcmp(digest, "CRC32C-NONE")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE);
|
|
|
|
} else if (!strcmp(digest, "NONE-CRC32C")) {
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
|
|
|
|
} else {
|
|
|
|
error_report("Invalid header-digest setting : %s", digest);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *parse_initiator_name(const char *target)
|
|
|
|
{
|
|
|
|
QemuOptsList *list;
|
|
|
|
QemuOpts *opts;
|
|
|
|
const char *name = NULL;
|
2012-08-06 16:24:55 +08:00
|
|
|
const char *iscsi_name = qemu_get_vm_name();
|
2012-01-26 06:39:02 +08:00
|
|
|
|
|
|
|
list = qemu_find_opts("iscsi");
|
2012-08-06 16:54:41 +08:00
|
|
|
if (list) {
|
|
|
|
opts = qemu_opts_find(list, target);
|
2012-01-26 06:39:02 +08:00
|
|
|
if (!opts) {
|
2012-08-06 16:54:41 +08:00
|
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
|
|
}
|
|
|
|
if (opts) {
|
|
|
|
name = qemu_opt_get(opts, "initiator-name");
|
2012-01-26 06:39:02 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-08-06 16:54:41 +08:00
|
|
|
if (name) {
|
|
|
|
return g_strdup(name);
|
|
|
|
} else {
|
2012-08-06 16:24:55 +08:00
|
|
|
return g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
|
|
|
|
iscsi_name ? ":" : "",
|
|
|
|
iscsi_name ? iscsi_name : "");
|
2012-01-26 06:39:02 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-12-06 17:46:47 +08:00
|
|
|
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
|
|
|
static void iscsi_nop_timed_event(void *opaque)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = opaque;
|
|
|
|
|
|
|
|
if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) {
|
|
|
|
error_report("iSCSI: NOP timeout. Reconnecting...");
|
|
|
|
iscsi_reconnect(iscsilun->iscsi);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) {
|
|
|
|
error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2013-08-21 23:03:08 +08:00
|
|
|
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
|
2012-12-06 17:46:47 +08:00
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2013-02-18 21:50:46 +08:00
|
|
|
static int iscsi_readcapacity_sync(IscsiLun *iscsilun)
|
|
|
|
{
|
|
|
|
struct scsi_task *task = NULL;
|
|
|
|
struct scsi_readcapacity10 *rc10 = NULL;
|
|
|
|
struct scsi_readcapacity16 *rc16 = NULL;
|
|
|
|
int ret = 0;
|
|
|
|
int retries = ISCSI_CMD_RETRIES;
|
|
|
|
|
2013-05-31 19:56:24 +08:00
|
|
|
do {
|
|
|
|
if (task != NULL) {
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
task = NULL;
|
2013-02-18 21:50:46 +08:00
|
|
|
}
|
2013-05-31 19:56:24 +08:00
|
|
|
|
|
|
|
switch (iscsilun->type) {
|
|
|
|
case TYPE_DISK:
|
|
|
|
task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun);
|
|
|
|
if (task != NULL && task->status == SCSI_STATUS_GOOD) {
|
|
|
|
rc16 = scsi_datain_unmarshall(task);
|
|
|
|
if (rc16 == NULL) {
|
|
|
|
error_report("iSCSI: Failed to unmarshall readcapacity16 data.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
} else {
|
|
|
|
iscsilun->block_size = rc16->block_length;
|
|
|
|
iscsilun->num_blocks = rc16->returned_lba + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case TYPE_ROM:
|
|
|
|
task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0);
|
|
|
|
if (task != NULL && task->status == SCSI_STATUS_GOOD) {
|
|
|
|
rc10 = scsi_datain_unmarshall(task);
|
|
|
|
if (rc10 == NULL) {
|
|
|
|
error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
} else {
|
|
|
|
iscsilun->block_size = rc10->block_size;
|
|
|
|
if (rc10->lba == 0) {
|
|
|
|
/* blank disk loaded */
|
|
|
|
iscsilun->num_blocks = 0;
|
|
|
|
} else {
|
|
|
|
iscsilun->num_blocks = rc10->lba + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return 0;
|
2013-02-18 21:50:46 +08:00
|
|
|
}
|
2013-05-31 19:56:24 +08:00
|
|
|
} while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
|
|
|
|
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
|
|
&& retries-- > 0);
|
2013-02-18 21:50:46 +08:00
|
|
|
|
2013-05-31 19:56:24 +08:00
|
|
|
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
|
|
|
|
error_report("iSCSI: failed to send readcapacity10 command.");
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
2013-02-18 21:50:46 +08:00
|
|
|
if (task) {
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-04-12 23:59:59 +08:00
|
|
|
/* TODO Convert to fine grained options */
|
|
|
|
static QemuOptsList runtime_opts = {
|
|
|
|
.name = "iscsi",
|
|
|
|
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
|
|
|
|
.desc = {
|
|
|
|
{
|
|
|
|
.name = "filename",
|
|
|
|
.type = QEMU_OPT_STRING,
|
|
|
|
.help = "URL to the iscsi image",
|
|
|
|
},
|
|
|
|
{ /* end of list */ }
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
/*
|
|
|
|
* We support iscsi url's on the form
|
|
|
|
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
|
|
|
*/
|
2013-04-13 02:02:37 +08:00
|
|
|
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags)
|
2011-10-25 16:24:24 +08:00
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = NULL;
|
|
|
|
struct iscsi_url *iscsi_url = NULL;
|
2012-11-17 21:37:39 +08:00
|
|
|
struct scsi_task *task = NULL;
|
|
|
|
struct scsi_inquiry_standard *inq = NULL;
|
2012-01-26 06:39:02 +08:00
|
|
|
char *initiator_name = NULL;
|
2013-04-12 23:59:59 +08:00
|
|
|
QemuOpts *opts;
|
|
|
|
Error *local_err = NULL;
|
|
|
|
const char *filename;
|
2011-10-25 16:24:24 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if ((BDRV_SECTOR_SIZE % 512) != 0) {
|
|
|
|
error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. "
|
|
|
|
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
|
|
|
|
"of 512", BDRV_SECTOR_SIZE);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2013-04-12 23:59:59 +08:00
|
|
|
opts = qemu_opts_create_nofail(&runtime_opts);
|
|
|
|
qemu_opts_absorb_qdict(opts, options, &local_err);
|
|
|
|
if (error_is_set(&local_err)) {
|
|
|
|
qerror_report_err(local_err);
|
|
|
|
error_free(local_err);
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
filename = qemu_opt_get(opts, "filename");
|
|
|
|
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
iscsi_url = iscsi_parse_full_url(iscsi, filename);
|
|
|
|
if (iscsi_url == NULL) {
|
2012-11-15 22:42:06 +08:00
|
|
|
error_report("Failed to parse URL : %s", filename);
|
2011-10-25 16:24:24 +08:00
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
|
|
|
|
initiator_name = parse_initiator_name(iscsi_url->target);
|
|
|
|
|
|
|
|
iscsi = iscsi_create_context(initiator_name);
|
|
|
|
if (iscsi == NULL) {
|
|
|
|
error_report("iSCSI: Failed to create iSCSI context.");
|
|
|
|
ret = -ENOMEM;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2012-01-26 06:39:02 +08:00
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
|
|
|
error_report("iSCSI: Failed to set target name.");
|
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if (iscsi_url->user != NULL) {
|
|
|
|
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user,
|
|
|
|
iscsi_url->passwd);
|
|
|
|
if (ret != 0) {
|
|
|
|
error_report("Failed to set initiator username and password");
|
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
}
|
2012-01-26 06:39:02 +08:00
|
|
|
|
|
|
|
/* check if we got CHAP username/password via the options */
|
|
|
|
if (parse_chap(iscsi, iscsi_url->target) != 0) {
|
|
|
|
error_report("iSCSI: Failed to set CHAP user/password");
|
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2012-01-26 06:39:02 +08:00
|
|
|
}
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
|
|
|
|
error_report("iSCSI: Failed to set session type to normal.");
|
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
|
|
|
|
|
2012-01-26 06:39:02 +08:00
|
|
|
/* check if we got HEADER_DIGEST via the options */
|
|
|
|
parse_header_digest(iscsi, iscsi_url->target);
|
|
|
|
|
2012-11-17 21:37:39 +08:00
|
|
|
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
|
|
|
|
error_report("iSCSI: Failed to connect to LUN : %s",
|
|
|
|
iscsi_get_error(iscsi));
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
iscsilun->iscsi = iscsi;
|
|
|
|
iscsilun->lun = iscsi_url->lun;
|
|
|
|
|
2012-11-17 21:37:39 +08:00
|
|
|
task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36);
|
|
|
|
|
|
|
|
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
|
|
|
|
error_report("iSCSI: failed to send inquiry command.");
|
2011-10-25 16:24:24 +08:00
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
2012-11-17 21:37:39 +08:00
|
|
|
inq = scsi_datain_unmarshall(task);
|
|
|
|
if (inq == NULL) {
|
|
|
|
error_report("iSCSI: Failed to unmarshall inquiry data.");
|
2011-10-25 16:24:24 +08:00
|
|
|
ret = -EINVAL;
|
2012-08-06 16:52:22 +08:00
|
|
|
goto out;
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
2012-05-26 12:56:41 +08:00
|
|
|
|
2012-11-17 21:37:39 +08:00
|
|
|
iscsilun->type = inq->periperal_device_type;
|
|
|
|
|
2013-02-18 21:50:46 +08:00
|
|
|
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) {
|
|
|
|
goto out;
|
2012-11-17 21:37:39 +08:00
|
|
|
}
|
2013-07-11 20:16:25 +08:00
|
|
|
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun);
|
2012-11-17 21:37:39 +08:00
|
|
|
|
2012-05-26 12:56:41 +08:00
|
|
|
/* Medium changer or tape. We dont have any emulation for this so this must
|
|
|
|
* be sg ioctl compatible. We force it to be sg, otherwise qemu will try
|
|
|
|
* to read from the device to guess the image format.
|
|
|
|
*/
|
|
|
|
if (iscsilun->type == TYPE_MEDIUM_CHANGER ||
|
|
|
|
iscsilun->type == TYPE_TAPE) {
|
|
|
|
bs->sg = 1;
|
|
|
|
}
|
|
|
|
|
2012-12-06 17:46:47 +08:00
|
|
|
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
|
|
|
/* Set up a timer for sending out iSCSI NOPs */
|
2013-08-21 23:03:08 +08:00
|
|
|
iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun);
|
|
|
|
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
|
2012-12-06 17:46:47 +08:00
|
|
|
#endif
|
|
|
|
|
2012-08-06 16:52:22 +08:00
|
|
|
out:
|
2013-04-12 23:59:59 +08:00
|
|
|
qemu_opts_del(opts);
|
2012-01-26 06:39:02 +08:00
|
|
|
if (initiator_name != NULL) {
|
|
|
|
g_free(initiator_name);
|
|
|
|
}
|
2011-10-25 16:24:24 +08:00
|
|
|
if (iscsi_url != NULL) {
|
|
|
|
iscsi_destroy_url(iscsi_url);
|
|
|
|
}
|
2012-11-17 21:37:39 +08:00
|
|
|
if (task != NULL) {
|
|
|
|
scsi_free_scsi_task(task);
|
|
|
|
}
|
2012-08-06 16:52:22 +08:00
|
|
|
|
|
|
|
if (ret) {
|
|
|
|
if (iscsi != NULL) {
|
|
|
|
iscsi_destroy_context(iscsi);
|
|
|
|
}
|
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void iscsi_close(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
|
2012-12-06 17:46:47 +08:00
|
|
|
if (iscsilun->nop_timer) {
|
2013-08-21 23:03:08 +08:00
|
|
|
timer_del(iscsilun->nop_timer);
|
|
|
|
timer_free(iscsilun->nop_timer);
|
2012-12-06 17:46:47 +08:00
|
|
|
}
|
2013-04-11 23:26:25 +08:00
|
|
|
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL);
|
2011-10-25 16:24:24 +08:00
|
|
|
iscsi_destroy_context(iscsi);
|
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
}
|
|
|
|
|
2013-02-18 21:50:46 +08:00
|
|
|
static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
|
|
|
|
{
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (iscsilun->type != TYPE_DISK) {
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (offset > iscsi_getlength(bs)) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-11-17 23:20:28 +08:00
|
|
|
static int iscsi_has_zero_init(BlockDriverState *bs)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-11-17 23:13:24 +08:00
|
|
|
static int iscsi_create(const char *filename, QEMUOptionParameter *options)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
int64_t total_size = 0;
|
2013-08-23 09:14:45 +08:00
|
|
|
BlockDriverState *bs;
|
2012-11-17 23:13:24 +08:00
|
|
|
IscsiLun *iscsilun = NULL;
|
2013-04-12 23:59:59 +08:00
|
|
|
QDict *bs_options;
|
2012-11-17 23:13:24 +08:00
|
|
|
|
2013-08-23 09:14:45 +08:00
|
|
|
bs = bdrv_new("");
|
2012-11-17 23:13:24 +08:00
|
|
|
|
|
|
|
/* Read out options */
|
|
|
|
while (options && options->name) {
|
|
|
|
if (!strcmp(options->name, "size")) {
|
|
|
|
total_size = options->value.n / BDRV_SECTOR_SIZE;
|
|
|
|
}
|
|
|
|
options++;
|
|
|
|
}
|
|
|
|
|
2013-08-23 09:14:45 +08:00
|
|
|
bs->opaque = g_malloc0(sizeof(struct IscsiLun));
|
|
|
|
iscsilun = bs->opaque;
|
2012-11-17 23:13:24 +08:00
|
|
|
|
2013-04-12 23:59:59 +08:00
|
|
|
bs_options = qdict_new();
|
|
|
|
qdict_put(bs_options, "filename", qstring_from_str(filename));
|
2013-08-23 09:14:45 +08:00
|
|
|
ret = iscsi_open(bs, bs_options, 0);
|
2013-04-12 23:59:59 +08:00
|
|
|
QDECREF(bs_options);
|
|
|
|
|
2012-11-17 23:13:24 +08:00
|
|
|
if (ret != 0) {
|
|
|
|
goto out;
|
|
|
|
}
|
2012-12-06 17:46:47 +08:00
|
|
|
if (iscsilun->nop_timer) {
|
2013-08-21 23:03:08 +08:00
|
|
|
timer_del(iscsilun->nop_timer);
|
|
|
|
timer_free(iscsilun->nop_timer);
|
2012-12-06 17:46:47 +08:00
|
|
|
}
|
2012-11-17 23:13:24 +08:00
|
|
|
if (iscsilun->type != TYPE_DISK) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
2013-08-23 09:14:45 +08:00
|
|
|
if (bs->total_sectors < total_size) {
|
2012-11-17 23:13:24 +08:00
|
|
|
ret = -ENOSPC;
|
2013-07-11 20:16:24 +08:00
|
|
|
goto out;
|
2012-11-17 23:13:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
|
|
if (iscsilun->iscsi != NULL) {
|
|
|
|
iscsi_destroy_context(iscsilun->iscsi);
|
|
|
|
}
|
2013-08-23 09:14:45 +08:00
|
|
|
g_free(bs->opaque);
|
|
|
|
bs->opaque = NULL;
|
2013-08-23 09:14:47 +08:00
|
|
|
bdrv_unref(bs);
|
2012-11-17 23:13:24 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static QEMUOptionParameter iscsi_create_options[] = {
|
|
|
|
{
|
|
|
|
.name = BLOCK_OPT_SIZE,
|
|
|
|
.type = OPT_SIZE,
|
|
|
|
.help = "Virtual disk size"
|
|
|
|
},
|
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static BlockDriver bdrv_iscsi = {
|
|
|
|
.format_name = "iscsi",
|
|
|
|
.protocol_name = "iscsi",
|
|
|
|
|
|
|
|
.instance_size = sizeof(IscsiLun),
|
|
|
|
.bdrv_file_open = iscsi_open,
|
|
|
|
.bdrv_close = iscsi_close,
|
2012-11-17 23:13:24 +08:00
|
|
|
.bdrv_create = iscsi_create,
|
|
|
|
.create_options = iscsi_create_options,
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
.bdrv_getlength = iscsi_getlength,
|
2013-02-18 21:50:46 +08:00
|
|
|
.bdrv_truncate = iscsi_truncate,
|
2011-10-25 16:24:24 +08:00
|
|
|
|
|
|
|
.bdrv_aio_readv = iscsi_aio_readv,
|
|
|
|
.bdrv_aio_writev = iscsi_aio_writev,
|
|
|
|
.bdrv_aio_flush = iscsi_aio_flush,
|
2012-04-24 14:29:04 +08:00
|
|
|
|
|
|
|
.bdrv_aio_discard = iscsi_aio_discard,
|
2012-11-17 23:20:28 +08:00
|
|
|
.bdrv_has_zero_init = iscsi_has_zero_init,
|
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 19:59:01 +08:00
|
|
|
|
|
|
|
#ifdef __linux__
|
|
|
|
.bdrv_ioctl = iscsi_ioctl,
|
|
|
|
.bdrv_aio_ioctl = iscsi_aio_ioctl,
|
|
|
|
#endif
|
2011-10-25 16:24:24 +08:00
|
|
|
};
|
|
|
|
|
2012-11-26 23:03:42 +08:00
|
|
|
static QemuOptsList qemu_iscsi_opts = {
|
|
|
|
.name = "iscsi",
|
|
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
|
|
|
|
.desc = {
|
|
|
|
{
|
|
|
|
.name = "user",
|
|
|
|
.type = QEMU_OPT_STRING,
|
|
|
|
.help = "username for CHAP authentication to target",
|
|
|
|
},{
|
|
|
|
.name = "password",
|
|
|
|
.type = QEMU_OPT_STRING,
|
|
|
|
.help = "password for CHAP authentication to target",
|
|
|
|
},{
|
|
|
|
.name = "header-digest",
|
|
|
|
.type = QEMU_OPT_STRING,
|
|
|
|
.help = "HeaderDigest setting. "
|
|
|
|
"{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
|
|
|
|
},{
|
|
|
|
.name = "initiator-name",
|
|
|
|
.type = QEMU_OPT_STRING,
|
|
|
|
.help = "Initiator iqn name to use when connecting",
|
|
|
|
},
|
|
|
|
{ /* end of list */ }
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2011-10-25 16:24:24 +08:00
|
|
|
static void iscsi_block_init(void)
|
|
|
|
{
|
|
|
|
bdrv_register(&bdrv_iscsi);
|
2012-11-26 23:03:42 +08:00
|
|
|
qemu_add_opts(&qemu_iscsi_opts);
|
2011-10-25 16:24:24 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
block_init(iscsi_block_init);
|