Version: GnuPG v2 iQEcBAABCAAGBQJX5LZ0AAoJEMo1YkxqkXHGmgAIAKeDTKx0sA76ewIvH9fKdmUu NNatJw59XnVX8lpfOU5yISkJ4BD6oBdN7tbWaOW8yzcAeYu1Ff5iUu4LBEUFb7eW g6zqUCV58XjaCTLmTiAfa19Exfnh6pXZlZMRP4Hr3vUVSCHFmC0EyTEllfHxU/jW aPHtAEge/p6EDAHygHJBTSQzsaXRdyJNyt/AKPreDtblNRT8VgapCDzZQPcCVGH1 F9grWVu0B/VVDS0mfgSRhT0UeF/vtiikuRW92sC4woVVB+brJyG4VwGT8oeUN8RU 30/tGo5p9fpqef3iP669uUrloLfmWcKcIJuPfQ4ZUlZh8kIV+lWK9kZuTVgocGw= =xLJw -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/famz/tags/various-pull-request' into staging # gpg: Signature made Fri 23 Sep 2016 05:58:28 BST # gpg: using RSA key 0xCA35624C6A9171C6 # gpg: Good signature from "Fam Zheng <famz@redhat.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 5003 7CB7 9706 0F76 F021 AD56 CA35 624C 6A91 71C6 * remotes/famz/tags/various-pull-request: (23 commits) docker: exec $CMD docker: Terminate instances at SIGTERM and SIGHUP docker: Support showing environment information docker: Print used options before doing configure docker: Flatten default target list in test-quick docker: Update fedora image to latest docker: Generate /packages.txt in ubuntu image docker: Generate /packages.txt in fedora image docker: Generate /packages.txt in centos6 image tests: Ignore test-uuid Add UUID files to MAINTAINERS tests: Add uuid tests uuid: Tighten uuid parse vl: Switch qemu_uuid to QemuUUID configure: Remove detection code for UUID tests: No longer dependent on CONFIG_UUID crypto: Switch to QEMU UUID API vpc: Use QEMU UUID API vdi: Use QEMU UUID API vhdx: Use QEMU UUID API ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org> # Conflicts: # tests/Makefile.include
2022 lines
61 KiB
C
2022 lines
61 KiB
C
/*
|
|
* QEMU Block driver for iSCSI images
|
|
*
|
|
* Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
|
|
* Copyright (c) 2012-2016 Peter Lieven <pl@kamp.de>
|
|
*
|
|
* 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 "qemu/osdep.h"
|
|
|
|
#include <poll.h>
|
|
#include <math.h>
|
|
#include <arpa/inet.h>
|
|
#include "qemu-common.h"
|
|
#include "qemu/config-file.h"
|
|
#include "qemu/error-report.h"
|
|
#include "qemu/bitops.h"
|
|
#include "qemu/bitmap.h"
|
|
#include "block/block_int.h"
|
|
#include "block/scsi.h"
|
|
#include "qemu/iov.h"
|
|
#include "qemu/uuid.h"
|
|
#include "qmp-commands.h"
|
|
#include "qapi/qmp/qstring.h"
|
|
#include "crypto/secret.h"
|
|
|
|
#include <iscsi/iscsi.h>
|
|
#include <iscsi/scsi-lowlevel.h>
|
|
|
|
#ifdef __linux__
|
|
#include <scsi/sg.h>
|
|
#endif
|
|
|
|
typedef struct IscsiLun {
|
|
struct iscsi_context *iscsi;
|
|
AioContext *aio_context;
|
|
int lun;
|
|
enum scsi_inquiry_peripheral_device_type type;
|
|
int block_size;
|
|
uint64_t num_blocks;
|
|
int events;
|
|
QEMUTimer *nop_timer;
|
|
QEMUTimer *event_timer;
|
|
struct scsi_inquiry_logical_block_provisioning lbp;
|
|
struct scsi_inquiry_block_limits bl;
|
|
unsigned char *zeroblock;
|
|
/* The allocmap tracks which clusters (pages) on the iSCSI target are
|
|
* allocated and which are not. In case a target returns zeros for
|
|
* unallocated pages (iscsilun->lprz) we can directly return zeros instead
|
|
* of reading zeros over the wire if a read request falls within an
|
|
* unallocated block. As there are 3 possible states we need 2 bitmaps to
|
|
* track. allocmap_valid keeps track if QEMU's information about a page is
|
|
* valid. allocmap tracks if a page is allocated or not. In case QEMU has no
|
|
* valid information about a page the corresponding allocmap entry should be
|
|
* switched to unallocated as well to force a new lookup of the allocation
|
|
* status as lookups are generally skipped if a page is suspect to be
|
|
* allocated. If a iSCSI target is opened with cache.direct = on the
|
|
* allocmap_valid does not exist turning all cached information invalid so
|
|
* that a fresh lookup is made for any page even if allocmap entry returns
|
|
* it's unallocated. */
|
|
unsigned long *allocmap;
|
|
unsigned long *allocmap_valid;
|
|
long allocmap_size;
|
|
int cluster_sectors;
|
|
bool use_16_for_rw;
|
|
bool write_protected;
|
|
bool lbpme;
|
|
bool lbprz;
|
|
bool dpofua;
|
|
bool has_write_same;
|
|
bool request_timed_out;
|
|
} IscsiLun;
|
|
|
|
typedef struct IscsiTask {
|
|
int status;
|
|
int complete;
|
|
int retries;
|
|
int do_retry;
|
|
struct scsi_task *task;
|
|
Coroutine *co;
|
|
QEMUBH *bh;
|
|
IscsiLun *iscsilun;
|
|
QEMUTimer retry_timer;
|
|
int err_code;
|
|
} IscsiTask;
|
|
|
|
typedef struct IscsiAIOCB {
|
|
BlockAIOCB common;
|
|
QEMUIOVector *qiov;
|
|
QEMUBH *bh;
|
|
IscsiLun *iscsilun;
|
|
struct scsi_task *task;
|
|
uint8_t *buf;
|
|
int status;
|
|
int64_t sector_num;
|
|
int nb_sectors;
|
|
int ret;
|
|
#ifdef __linux__
|
|
sg_io_hdr_t *ioh;
|
|
#endif
|
|
} IscsiAIOCB;
|
|
|
|
/* libiscsi uses time_t so its enough to process events every second */
|
|
#define EVENT_INTERVAL 1000
|
|
#define NOP_INTERVAL 5000
|
|
#define MAX_NOP_FAILURES 3
|
|
#define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times)
|
|
static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048, 8192, 32768};
|
|
|
|
/* this threshold is a trade-off knob to choose between
|
|
* the potential additional overhead of an extra GET_LBA_STATUS request
|
|
* vs. unnecessarily reading a lot of zero sectors over the wire.
|
|
* If a read request is greater or equal than ISCSI_CHECKALLOC_THRES
|
|
* sectors we check the allocation status of the area covered by the
|
|
* request first if the allocationmap indicates that the area might be
|
|
* unallocated. */
|
|
#define ISCSI_CHECKALLOC_THRES 64
|
|
|
|
static void
|
|
iscsi_bh_cb(void *p)
|
|
{
|
|
IscsiAIOCB *acb = p;
|
|
|
|
qemu_bh_delete(acb->bh);
|
|
|
|
g_free(acb->buf);
|
|
acb->buf = NULL;
|
|
|
|
acb->common.cb(acb->common.opaque, acb->status);
|
|
|
|
if (acb->task != NULL) {
|
|
scsi_free_scsi_task(acb->task);
|
|
acb->task = NULL;
|
|
}
|
|
|
|
qemu_aio_unref(acb);
|
|
}
|
|
|
|
static void
|
|
iscsi_schedule_bh(IscsiAIOCB *acb)
|
|
{
|
|
if (acb->bh) {
|
|
return;
|
|
}
|
|
acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb);
|
|
qemu_bh_schedule(acb->bh);
|
|
}
|
|
|
|
static void iscsi_co_generic_bh_cb(void *opaque)
|
|
{
|
|
struct IscsiTask *iTask = opaque;
|
|
iTask->complete = 1;
|
|
qemu_bh_delete(iTask->bh);
|
|
qemu_coroutine_enter(iTask->co);
|
|
}
|
|
|
|
static void iscsi_retry_timer_expired(void *opaque)
|
|
{
|
|
struct IscsiTask *iTask = opaque;
|
|
iTask->complete = 1;
|
|
if (iTask->co) {
|
|
qemu_coroutine_enter(iTask->co);
|
|
}
|
|
}
|
|
|
|
static inline unsigned exp_random(double mean)
|
|
{
|
|
return -mean * log((double)rand() / RAND_MAX);
|
|
}
|
|
|
|
/* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in
|
|
* libiscsi 1.10.0, together with other constants we need. Use it as
|
|
* a hint that we have to define them ourselves if needed, to keep the
|
|
* minimum required libiscsi version at 1.9.0. We use an ASCQ macro for
|
|
* the test because SCSI_STATUS_* is an enum.
|
|
*
|
|
* To guard against future changes where SCSI_SENSE_ASCQ_* also becomes
|
|
* an enum, check against the LIBISCSI_API_VERSION macro, which was
|
|
* introduced in 1.11.0. If it is present, there is no need to define
|
|
* anything.
|
|
*/
|
|
#if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \
|
|
!defined(LIBISCSI_API_VERSION)
|
|
#define SCSI_STATUS_TASK_SET_FULL 0x28
|
|
#define SCSI_STATUS_TIMEOUT 0x0f000002
|
|
#define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600
|
|
#define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00
|
|
#endif
|
|
|
|
static int iscsi_translate_sense(struct scsi_sense *sense)
|
|
{
|
|
int ret;
|
|
|
|
switch (sense->key) {
|
|
case SCSI_SENSE_NOT_READY:
|
|
return -EBUSY;
|
|
case SCSI_SENSE_DATA_PROTECTION:
|
|
return -EACCES;
|
|
case SCSI_SENSE_COMMAND_ABORTED:
|
|
return -ECANCELED;
|
|
case SCSI_SENSE_ILLEGAL_REQUEST:
|
|
/* Parse ASCQ */
|
|
break;
|
|
default:
|
|
return -EIO;
|
|
}
|
|
switch (sense->ascq) {
|
|
case SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR:
|
|
case SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE:
|
|
case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB:
|
|
case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST:
|
|
ret = -EINVAL;
|
|
break;
|
|
case SCSI_SENSE_ASCQ_LBA_OUT_OF_RANGE:
|
|
ret = -ENOSPC;
|
|
break;
|
|
case SCSI_SENSE_ASCQ_LOGICAL_UNIT_NOT_SUPPORTED:
|
|
ret = -ENOTSUP;
|
|
break;
|
|
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT:
|
|
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_CLOSED:
|
|
case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_OPEN:
|
|
ret = -ENOMEDIUM;
|
|
break;
|
|
case SCSI_SENSE_ASCQ_WRITE_PROTECTED:
|
|
ret = -EACCES;
|
|
break;
|
|
default:
|
|
ret = -EIO;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
|
|
void *command_data, void *opaque)
|
|
{
|
|
struct IscsiTask *iTask = opaque;
|
|
struct scsi_task *task = command_data;
|
|
|
|
iTask->status = status;
|
|
iTask->do_retry = 0;
|
|
iTask->task = task;
|
|
|
|
if (status != SCSI_STATUS_GOOD) {
|
|
if (iTask->retries++ < ISCSI_CMD_RETRIES) {
|
|
if (status == SCSI_STATUS_CHECK_CONDITION
|
|
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION) {
|
|
error_report("iSCSI CheckCondition: %s",
|
|
iscsi_get_error(iscsi));
|
|
iTask->do_retry = 1;
|
|
goto out;
|
|
}
|
|
if (status == SCSI_STATUS_BUSY ||
|
|
status == SCSI_STATUS_TIMEOUT ||
|
|
status == SCSI_STATUS_TASK_SET_FULL) {
|
|
unsigned retry_time =
|
|
exp_random(iscsi_retry_times[iTask->retries - 1]);
|
|
if (status == SCSI_STATUS_TIMEOUT) {
|
|
/* make sure the request is rescheduled AFTER the
|
|
* reconnect is initiated */
|
|
retry_time = EVENT_INTERVAL * 2;
|
|
iTask->iscsilun->request_timed_out = true;
|
|
}
|
|
error_report("iSCSI Busy/TaskSetFull/TimeOut"
|
|
" (retry #%u in %u ms): %s",
|
|
iTask->retries, retry_time,
|
|
iscsi_get_error(iscsi));
|
|
aio_timer_init(iTask->iscsilun->aio_context,
|
|
&iTask->retry_timer, QEMU_CLOCK_REALTIME,
|
|
SCALE_MS, iscsi_retry_timer_expired, iTask);
|
|
timer_mod(&iTask->retry_timer,
|
|
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time);
|
|
iTask->do_retry = 1;
|
|
return;
|
|
}
|
|
}
|
|
iTask->err_code = iscsi_translate_sense(&task->sense);
|
|
error_report("iSCSI Failure: %s", iscsi_get_error(iscsi));
|
|
}
|
|
|
|
out:
|
|
if (iTask->co) {
|
|
iTask->bh = aio_bh_new(iTask->iscsilun->aio_context,
|
|
iscsi_co_generic_bh_cb, iTask);
|
|
qemu_bh_schedule(iTask->bh);
|
|
} else {
|
|
iTask->complete = 1;
|
|
}
|
|
}
|
|
|
|
static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask)
|
|
{
|
|
*iTask = (struct IscsiTask) {
|
|
.co = qemu_coroutine_self(),
|
|
.iscsilun = iscsilun,
|
|
};
|
|
}
|
|
|
|
static void
|
|
iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data,
|
|
void *private_data)
|
|
{
|
|
IscsiAIOCB *acb = private_data;
|
|
|
|
acb->status = -ECANCELED;
|
|
iscsi_schedule_bh(acb);
|
|
}
|
|
|
|
static void
|
|
iscsi_aio_cancel(BlockAIOCB *blockacb)
|
|
{
|
|
IscsiAIOCB *acb = (IscsiAIOCB *)blockacb;
|
|
IscsiLun *iscsilun = acb->iscsilun;
|
|
|
|
if (acb->status != -EINPROGRESS) {
|
|
return;
|
|
}
|
|
|
|
/* send a task mgmt call to the target to cancel the task on the target */
|
|
iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
|
|
iscsi_abort_task_cb, acb);
|
|
|
|
}
|
|
|
|
static const AIOCBInfo iscsi_aiocb_info = {
|
|
.aiocb_size = sizeof(IscsiAIOCB),
|
|
.cancel_async = 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;
|
|
int ev = iscsi_which_events(iscsi);
|
|
|
|
if (ev != iscsilun->events) {
|
|
aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsi),
|
|
false,
|
|
(ev & POLLIN) ? iscsi_process_read : NULL,
|
|
(ev & POLLOUT) ? iscsi_process_write : NULL,
|
|
iscsilun);
|
|
iscsilun->events = ev;
|
|
}
|
|
}
|
|
|
|
static void iscsi_timed_check_events(void *opaque)
|
|
{
|
|
IscsiLun *iscsilun = opaque;
|
|
|
|
/* check for timed out requests */
|
|
iscsi_service(iscsilun->iscsi, 0);
|
|
|
|
if (iscsilun->request_timed_out) {
|
|
iscsilun->request_timed_out = false;
|
|
iscsi_reconnect(iscsilun->iscsi);
|
|
}
|
|
|
|
/* newer versions of libiscsi may return zero events. Ensure we are able
|
|
* to return to service once this situation changes. */
|
|
iscsi_set_events(iscsilun);
|
|
|
|
timer_mod(iscsilun->event_timer,
|
|
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun)
|
|
{
|
|
return sector * iscsilun->block_size / BDRV_SECTOR_SIZE;
|
|
}
|
|
|
|
static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
|
|
{
|
|
return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
|
|
}
|
|
|
|
static bool is_byte_request_lun_aligned(int64_t offset, int count,
|
|
IscsiLun *iscsilun)
|
|
{
|
|
if (offset % iscsilun->block_size || count % iscsilun->block_size) {
|
|
error_report("iSCSI misaligned request: "
|
|
"iscsilun->block_size %u, offset %" PRIi64
|
|
", count %d",
|
|
iscsilun->block_size, offset, count);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool is_sector_request_lun_aligned(int64_t sector_num, int nb_sectors,
|
|
IscsiLun *iscsilun)
|
|
{
|
|
assert(nb_sectors <= BDRV_REQUEST_MAX_SECTORS);
|
|
return is_byte_request_lun_aligned(sector_num << BDRV_SECTOR_BITS,
|
|
nb_sectors << BDRV_SECTOR_BITS,
|
|
iscsilun);
|
|
}
|
|
|
|
static void iscsi_allocmap_free(IscsiLun *iscsilun)
|
|
{
|
|
g_free(iscsilun->allocmap);
|
|
g_free(iscsilun->allocmap_valid);
|
|
iscsilun->allocmap = NULL;
|
|
iscsilun->allocmap_valid = NULL;
|
|
}
|
|
|
|
|
|
static int iscsi_allocmap_init(IscsiLun *iscsilun, int open_flags)
|
|
{
|
|
iscsi_allocmap_free(iscsilun);
|
|
|
|
iscsilun->allocmap_size =
|
|
DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks, iscsilun),
|
|
iscsilun->cluster_sectors);
|
|
|
|
iscsilun->allocmap = bitmap_try_new(iscsilun->allocmap_size);
|
|
if (!iscsilun->allocmap) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (open_flags & BDRV_O_NOCACHE) {
|
|
/* in case that cache.direct = on all allocmap entries are
|
|
* treated as invalid to force a relookup of the block
|
|
* status on every read request */
|
|
return 0;
|
|
}
|
|
|
|
iscsilun->allocmap_valid = bitmap_try_new(iscsilun->allocmap_size);
|
|
if (!iscsilun->allocmap_valid) {
|
|
/* if we are under memory pressure free the allocmap as well */
|
|
iscsi_allocmap_free(iscsilun);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
iscsi_allocmap_update(IscsiLun *iscsilun, int64_t sector_num,
|
|
int nb_sectors, bool allocated, bool valid)
|
|
{
|
|
int64_t cl_num_expanded, nb_cls_expanded, cl_num_shrunk, nb_cls_shrunk;
|
|
|
|
if (iscsilun->allocmap == NULL) {
|
|
return;
|
|
}
|
|
/* expand to entirely contain all affected clusters */
|
|
cl_num_expanded = sector_num / iscsilun->cluster_sectors;
|
|
nb_cls_expanded = DIV_ROUND_UP(sector_num + nb_sectors,
|
|
iscsilun->cluster_sectors) - cl_num_expanded;
|
|
/* shrink to touch only completely contained clusters */
|
|
cl_num_shrunk = DIV_ROUND_UP(sector_num, iscsilun->cluster_sectors);
|
|
nb_cls_shrunk = (sector_num + nb_sectors) / iscsilun->cluster_sectors
|
|
- cl_num_shrunk;
|
|
if (allocated) {
|
|
bitmap_set(iscsilun->allocmap, cl_num_expanded, nb_cls_expanded);
|
|
} else {
|
|
bitmap_clear(iscsilun->allocmap, cl_num_shrunk, nb_cls_shrunk);
|
|
}
|
|
|
|
if (iscsilun->allocmap_valid == NULL) {
|
|
return;
|
|
}
|
|
if (valid) {
|
|
bitmap_set(iscsilun->allocmap_valid, cl_num_shrunk, nb_cls_shrunk);
|
|
} else {
|
|
bitmap_clear(iscsilun->allocmap_valid, cl_num_expanded,
|
|
nb_cls_expanded);
|
|
}
|
|
}
|
|
|
|
static void
|
|
iscsi_allocmap_set_allocated(IscsiLun *iscsilun, int64_t sector_num,
|
|
int nb_sectors)
|
|
{
|
|
iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, true, true);
|
|
}
|
|
|
|
static void
|
|
iscsi_allocmap_set_unallocated(IscsiLun *iscsilun, int64_t sector_num,
|
|
int nb_sectors)
|
|
{
|
|
/* Note: if cache.direct=on the fifth argument to iscsi_allocmap_update
|
|
* is ignored, so this will in effect be an iscsi_allocmap_set_invalid.
|
|
*/
|
|
iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, true);
|
|
}
|
|
|
|
static void iscsi_allocmap_set_invalid(IscsiLun *iscsilun, int64_t sector_num,
|
|
int nb_sectors)
|
|
{
|
|
iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, false);
|
|
}
|
|
|
|
static void iscsi_allocmap_invalidate(IscsiLun *iscsilun)
|
|
{
|
|
if (iscsilun->allocmap) {
|
|
bitmap_zero(iscsilun->allocmap, iscsilun->allocmap_size);
|
|
}
|
|
if (iscsilun->allocmap_valid) {
|
|
bitmap_zero(iscsilun->allocmap_valid, iscsilun->allocmap_size);
|
|
}
|
|
}
|
|
|
|
static inline bool
|
|
iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_t sector_num,
|
|
int nb_sectors)
|
|
{
|
|
unsigned long size;
|
|
if (iscsilun->allocmap == NULL) {
|
|
return true;
|
|
}
|
|
size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors);
|
|
return !(find_next_bit(iscsilun->allocmap, size,
|
|
sector_num / iscsilun->cluster_sectors) == size);
|
|
}
|
|
|
|
static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun,
|
|
int64_t sector_num, int nb_sectors)
|
|
{
|
|
unsigned long size;
|
|
if (iscsilun->allocmap_valid == NULL) {
|
|
return false;
|
|
}
|
|
size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors);
|
|
return (find_next_zero_bit(iscsilun->allocmap_valid, size,
|
|
sector_num / iscsilun->cluster_sectors) == size);
|
|
}
|
|
|
|
static int coroutine_fn
|
|
iscsi_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
|
|
QEMUIOVector *iov, int flags)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct IscsiTask iTask;
|
|
uint64_t lba;
|
|
uint32_t num_sectors;
|
|
bool fua = flags & BDRV_REQ_FUA;
|
|
|
|
if (fua) {
|
|
assert(iscsilun->dpofua);
|
|
}
|
|
if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bs->bl.max_transfer) {
|
|
assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer);
|
|
}
|
|
|
|
lba = sector_qemu2lun(sector_num, iscsilun);
|
|
num_sectors = sector_qemu2lun(nb_sectors, iscsilun);
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
retry:
|
|
if (iscsilun->use_16_for_rw) {
|
|
iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
NULL, num_sectors * iscsilun->block_size,
|
|
iscsilun->block_size, 0, 0, fua, 0, 0,
|
|
iscsi_co_generic_cb, &iTask);
|
|
} else {
|
|
iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
NULL, num_sectors * iscsilun->block_size,
|
|
iscsilun->block_size, 0, 0, fua, 0, 0,
|
|
iscsi_co_generic_cb, &iTask);
|
|
}
|
|
if (iTask.task == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov,
|
|
iov->niov);
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
iscsi_allocmap_set_invalid(iscsilun, sector_num, nb_sectors);
|
|
return iTask.err_code;
|
|
}
|
|
|
|
iscsi_allocmap_set_allocated(iscsilun, sector_num, nb_sectors);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs,
|
|
int64_t sector_num,
|
|
int nb_sectors, int *pnum,
|
|
BlockDriverState **file)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct scsi_get_lba_status *lbas = NULL;
|
|
struct scsi_lba_status_descriptor *lbasd = NULL;
|
|
struct IscsiTask iTask;
|
|
int64_t ret;
|
|
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
|
|
if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* default to all sectors allocated */
|
|
ret = BDRV_BLOCK_DATA;
|
|
ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID;
|
|
*pnum = nb_sectors;
|
|
|
|
/* LUN does not support logical block provisioning */
|
|
if (!iscsilun->lbpme) {
|
|
goto out;
|
|
}
|
|
|
|
retry:
|
|
if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun,
|
|
sector_qemu2lun(sector_num, iscsilun),
|
|
8 + 16, iscsi_co_generic_cb,
|
|
&iTask) == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
/* in case the get_lba_status_callout fails (i.e.
|
|
* because the device is busy or the cmd is not
|
|
* supported) we pretend all blocks are allocated
|
|
* for backwards compatibility */
|
|
goto out;
|
|
}
|
|
|
|
lbas = scsi_datain_unmarshall(iTask.task);
|
|
if (lbas == NULL) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
lbasd = &lbas->descriptors[0];
|
|
|
|
if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
*pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun);
|
|
|
|
if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED ||
|
|
lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) {
|
|
ret &= ~BDRV_BLOCK_DATA;
|
|
if (iscsilun->lbprz) {
|
|
ret |= BDRV_BLOCK_ZERO;
|
|
}
|
|
}
|
|
|
|
if (ret & BDRV_BLOCK_ZERO) {
|
|
iscsi_allocmap_set_unallocated(iscsilun, sector_num, *pnum);
|
|
} else {
|
|
iscsi_allocmap_set_allocated(iscsilun, sector_num, *pnum);
|
|
}
|
|
|
|
if (*pnum > nb_sectors) {
|
|
*pnum = nb_sectors;
|
|
}
|
|
out:
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
}
|
|
if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) {
|
|
*file = bs;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int coroutine_fn iscsi_co_readv(BlockDriverState *bs,
|
|
int64_t sector_num, int nb_sectors,
|
|
QEMUIOVector *iov)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct IscsiTask iTask;
|
|
uint64_t lba;
|
|
uint32_t num_sectors;
|
|
|
|
if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bs->bl.max_transfer) {
|
|
assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer);
|
|
}
|
|
|
|
/* if cache.direct is off and we have a valid entry in our allocation map
|
|
* we can skip checking the block status and directly return zeroes if
|
|
* the request falls within an unallocated area */
|
|
if (iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) &&
|
|
!iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) {
|
|
qemu_iovec_memset(iov, 0, 0x00, iov->size);
|
|
return 0;
|
|
}
|
|
|
|
if (nb_sectors >= ISCSI_CHECKALLOC_THRES &&
|
|
!iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) &&
|
|
!iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) {
|
|
int pnum;
|
|
BlockDriverState *file;
|
|
/* check the block status from the beginning of the cluster
|
|
* containing the start sector */
|
|
int64_t ret = iscsi_co_get_block_status(bs,
|
|
sector_num - sector_num % iscsilun->cluster_sectors,
|
|
BDRV_REQUEST_MAX_SECTORS, &pnum, &file);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
/* if the whole request falls into an unallocated area we can avoid
|
|
* to read and directly return zeroes instead */
|
|
if (ret & BDRV_BLOCK_ZERO &&
|
|
pnum >= nb_sectors + sector_num % iscsilun->cluster_sectors) {
|
|
qemu_iovec_memset(iov, 0, 0x00, iov->size);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
lba = sector_qemu2lun(sector_num, iscsilun);
|
|
num_sectors = sector_qemu2lun(nb_sectors, iscsilun);
|
|
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
retry:
|
|
if (iscsilun->use_16_for_rw) {
|
|
iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
num_sectors * iscsilun->block_size,
|
|
iscsilun->block_size, 0, 0, 0, 0, 0,
|
|
iscsi_co_generic_cb, &iTask);
|
|
} else {
|
|
iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
num_sectors * iscsilun->block_size,
|
|
iscsilun->block_size,
|
|
0, 0, 0, 0, 0,
|
|
iscsi_co_generic_cb, &iTask);
|
|
}
|
|
if (iTask.task == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov);
|
|
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
return iTask.err_code;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int coroutine_fn iscsi_co_flush(BlockDriverState *bs)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct IscsiTask iTask;
|
|
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
retry:
|
|
if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0,
|
|
0, iscsi_co_generic_cb, &iTask) == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
return iTask.err_code;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef __linux__
|
|
static void
|
|
iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status,
|
|
void *command_data, void *opaque)
|
|
{
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
g_free(acb->buf);
|
|
acb->buf = NULL;
|
|
|
|
acb->status = 0;
|
|
if (status < 0) {
|
|
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
|
|
iscsi_get_error(iscsi));
|
|
acb->status = iscsi_translate_sense(&acb->task->sense);
|
|
}
|
|
|
|
acb->ioh->driver_status = 0;
|
|
acb->ioh->host_status = 0;
|
|
acb->ioh->resid = 0;
|
|
acb->ioh->status = status;
|
|
|
|
#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);
|
|
}
|
|
|
|
iscsi_schedule_bh(acb);
|
|
}
|
|
|
|
static void iscsi_ioctl_bh_completion(void *opaque)
|
|
{
|
|
IscsiAIOCB *acb = opaque;
|
|
|
|
qemu_bh_delete(acb->bh);
|
|
acb->common.cb(acb->common.opaque, acb->ret);
|
|
qemu_aio_unref(acb);
|
|
}
|
|
|
|
static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf)
|
|
{
|
|
BlockDriverState *bs = acb->common.bs;
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
int ret = 0;
|
|
|
|
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;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
assert(!acb->bh);
|
|
acb->bh = aio_bh_new(bdrv_get_aio_context(bs),
|
|
iscsi_ioctl_bh_completion, acb);
|
|
acb->ret = ret;
|
|
qemu_bh_schedule(acb->bh);
|
|
}
|
|
|
|
static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
|
|
unsigned long int req, void *buf,
|
|
BlockCompletionFunc *cb, void *opaque)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
struct iscsi_data data;
|
|
IscsiAIOCB *acb;
|
|
|
|
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
|
|
|
|
acb->iscsilun = iscsilun;
|
|
acb->bh = NULL;
|
|
acb->status = -EINPROGRESS;
|
|
acb->buf = NULL;
|
|
acb->ioh = buf;
|
|
|
|
if (req != SG_IO) {
|
|
iscsi_ioctl_handle_emulated(acb, req, buf);
|
|
return &acb->common;
|
|
}
|
|
|
|
if (acb->ioh->cmd_len > SCSI_CDB_MAX_SIZE) {
|
|
error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)",
|
|
acb->ioh->cmd_len, SCSI_CDB_MAX_SIZE);
|
|
qemu_aio_unref(acb);
|
|
return NULL;
|
|
}
|
|
|
|
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_unref(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;
|
|
|
|
data.size = 0;
|
|
if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
|
|
if (acb->ioh->iovec_count == 0) {
|
|
data.data = acb->ioh->dxferp;
|
|
data.size = acb->ioh->dxfer_len;
|
|
} else {
|
|
scsi_task_set_iov_out(acb->task,
|
|
(struct scsi_iovec *) acb->ioh->dxferp,
|
|
acb->ioh->iovec_count);
|
|
}
|
|
}
|
|
|
|
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
|
|
iscsi_aio_ioctl_cb,
|
|
(data.size > 0) ? &data : NULL,
|
|
acb) != 0) {
|
|
scsi_free_scsi_task(acb->task);
|
|
qemu_aio_unref(acb);
|
|
return NULL;
|
|
}
|
|
|
|
/* tell libiscsi to read straight into the buffer we got from ioctl */
|
|
if (acb->task->xfer_dir == SCSI_XFER_READ) {
|
|
if (acb->ioh->iovec_count == 0) {
|
|
scsi_task_add_data_in_buffer(acb->task,
|
|
acb->ioh->dxfer_len,
|
|
acb->ioh->dxferp);
|
|
} else {
|
|
scsi_task_set_iov_in(acb->task,
|
|
(struct scsi_iovec *) acb->ioh->dxferp,
|
|
acb->ioh->iovec_count);
|
|
}
|
|
}
|
|
|
|
iscsi_set_events(iscsilun);
|
|
|
|
return &acb->common;
|
|
}
|
|
|
|
#endif
|
|
|
|
static int64_t
|
|
iscsi_getlength(BlockDriverState *bs)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
int64_t len;
|
|
|
|
len = iscsilun->num_blocks;
|
|
len *= iscsilun->block_size;
|
|
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int count)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct IscsiTask iTask;
|
|
struct unmap_list list;
|
|
|
|
assert(is_byte_request_lun_aligned(offset, count, iscsilun));
|
|
|
|
if (!iscsilun->lbp.lbpu) {
|
|
/* UNMAP is not supported by the target */
|
|
return 0;
|
|
}
|
|
|
|
list.lba = offset / iscsilun->block_size;
|
|
list.num = count / iscsilun->block_size;
|
|
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
retry:
|
|
if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1,
|
|
iscsi_co_generic_cb, &iTask) == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
|
|
/* the target might fail with a check condition if it
|
|
is not happy with the alignment of the UNMAP request
|
|
we silently fail in this case */
|
|
return 0;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
return iTask.err_code;
|
|
}
|
|
|
|
iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS,
|
|
count >> BDRV_SECTOR_BITS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
|
|
int count, BdrvRequestFlags flags)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct IscsiTask iTask;
|
|
uint64_t lba;
|
|
uint32_t nb_blocks;
|
|
bool use_16_for_ws = iscsilun->use_16_for_rw;
|
|
|
|
if (!is_byte_request_lun_aligned(offset, count, iscsilun)) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (flags & BDRV_REQ_MAY_UNMAP) {
|
|
if (!use_16_for_ws && !iscsilun->lbp.lbpws10) {
|
|
/* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */
|
|
use_16_for_ws = true;
|
|
}
|
|
if (use_16_for_ws && !iscsilun->lbp.lbpws) {
|
|
/* WRITESAME16 with UNMAP is not supported by the target,
|
|
* fall back and try WRITESAME10/16 without UNMAP */
|
|
flags &= ~BDRV_REQ_MAY_UNMAP;
|
|
use_16_for_ws = iscsilun->use_16_for_rw;
|
|
}
|
|
}
|
|
|
|
if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
|
|
/* WRITESAME without UNMAP is not supported by the target */
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
lba = offset / iscsilun->block_size;
|
|
nb_blocks = count / iscsilun->block_size;
|
|
|
|
if (iscsilun->zeroblock == NULL) {
|
|
iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size);
|
|
if (iscsilun->zeroblock == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
iscsi_co_init_iscsitask(iscsilun, &iTask);
|
|
retry:
|
|
if (use_16_for_ws) {
|
|
iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
iscsilun->zeroblock, iscsilun->block_size,
|
|
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
|
|
0, 0, iscsi_co_generic_cb, &iTask);
|
|
} else {
|
|
iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba,
|
|
iscsilun->zeroblock, iscsilun->block_size,
|
|
nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP),
|
|
0, 0, iscsi_co_generic_cb, &iTask);
|
|
}
|
|
if (iTask.task == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
while (!iTask.complete) {
|
|
iscsi_set_events(iscsilun);
|
|
qemu_coroutine_yield();
|
|
}
|
|
|
|
if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
|
|
iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&
|
|
(iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE ||
|
|
iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) {
|
|
/* WRITE SAME is not supported by the target */
|
|
iscsilun->has_write_same = false;
|
|
scsi_free_scsi_task(iTask.task);
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
if (iTask.task != NULL) {
|
|
scsi_free_scsi_task(iTask.task);
|
|
iTask.task = NULL;
|
|
}
|
|
|
|
if (iTask.do_retry) {
|
|
iTask.complete = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (iTask.status != SCSI_STATUS_GOOD) {
|
|
iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS,
|
|
count >> BDRV_SECTOR_BITS);
|
|
return iTask.err_code;
|
|
}
|
|
|
|
if (flags & BDRV_REQ_MAY_UNMAP) {
|
|
iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS,
|
|
count >> BDRV_SECTOR_BITS);
|
|
} else {
|
|
iscsi_allocmap_set_allocated(iscsilun, offset >> BDRV_SECTOR_BITS,
|
|
count >> BDRV_SECTOR_BITS);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void parse_chap(struct iscsi_context *iscsi, const char *target,
|
|
Error **errp)
|
|
{
|
|
QemuOptsList *list;
|
|
QemuOpts *opts;
|
|
const char *user = NULL;
|
|
const char *password = NULL;
|
|
const char *secretid;
|
|
char *secret = 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;
|
|
}
|
|
}
|
|
|
|
user = qemu_opt_get(opts, "user");
|
|
if (!user) {
|
|
return;
|
|
}
|
|
|
|
secretid = qemu_opt_get(opts, "password-secret");
|
|
password = qemu_opt_get(opts, "password");
|
|
if (secretid && password) {
|
|
error_setg(errp, "'password' and 'password-secret' properties are "
|
|
"mutually exclusive");
|
|
return;
|
|
}
|
|
if (secretid) {
|
|
secret = qcrypto_secret_lookup_as_utf8(secretid, errp);
|
|
if (!secret) {
|
|
return;
|
|
}
|
|
password = secret;
|
|
} else if (!password) {
|
|
error_setg(errp, "CHAP username specified but no password was given");
|
|
return;
|
|
}
|
|
|
|
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
|
error_setg(errp, "Failed to set initiator username and password");
|
|
}
|
|
|
|
g_free(secret);
|
|
}
|
|
|
|
static void parse_header_digest(struct iscsi_context *iscsi, const char *target,
|
|
Error **errp)
|
|
{
|
|
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_setg(errp, "Invalid header-digest setting : %s", digest);
|
|
}
|
|
}
|
|
|
|
static char *parse_initiator_name(const char *target)
|
|
{
|
|
QemuOptsList *list;
|
|
QemuOpts *opts;
|
|
const char *name;
|
|
char *iscsi_name;
|
|
UuidInfo *uuid_info;
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
if (list) {
|
|
opts = qemu_opts_find(list, target);
|
|
if (!opts) {
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
}
|
|
if (opts) {
|
|
name = qemu_opt_get(opts, "initiator-name");
|
|
if (name) {
|
|
return g_strdup(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
uuid_info = qmp_query_uuid(NULL);
|
|
if (strcmp(uuid_info->UUID, UUID_NONE) == 0) {
|
|
name = qemu_get_vm_name();
|
|
} else {
|
|
name = uuid_info->UUID;
|
|
}
|
|
iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
|
|
name ? ":" : "", name ? name : "");
|
|
qapi_free_UuidInfo(uuid_info);
|
|
return iscsi_name;
|
|
}
|
|
|
|
static int parse_timeout(const char *target)
|
|
{
|
|
QemuOptsList *list;
|
|
QemuOpts *opts;
|
|
const char *timeout;
|
|
|
|
list = qemu_find_opts("iscsi");
|
|
if (list) {
|
|
opts = qemu_opts_find(list, target);
|
|
if (!opts) {
|
|
opts = QTAILQ_FIRST(&list->head);
|
|
}
|
|
if (opts) {
|
|
timeout = qemu_opt_get(opts, "timeout");
|
|
if (timeout) {
|
|
return atoi(timeout);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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...");
|
|
iscsilun->request_timed_out = true;
|
|
} else if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) {
|
|
error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
|
|
return;
|
|
}
|
|
|
|
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
|
|
iscsi_set_events(iscsilun);
|
|
}
|
|
|
|
static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp)
|
|
{
|
|
struct scsi_task *task = NULL;
|
|
struct scsi_readcapacity10 *rc10 = NULL;
|
|
struct scsi_readcapacity16 *rc16 = NULL;
|
|
int retries = ISCSI_CMD_RETRIES;
|
|
|
|
do {
|
|
if (task != NULL) {
|
|
scsi_free_scsi_task(task);
|
|
task = NULL;
|
|
}
|
|
|
|
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_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data.");
|
|
} else {
|
|
iscsilun->block_size = rc16->block_length;
|
|
iscsilun->num_blocks = rc16->returned_lba + 1;
|
|
iscsilun->lbpme = !!rc16->lbpme;
|
|
iscsilun->lbprz = !!rc16->lbprz;
|
|
iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff);
|
|
}
|
|
break;
|
|
}
|
|
if (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
|
|
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION) {
|
|
break;
|
|
}
|
|
/* Fall through and try READ CAPACITY(10) instead. */
|
|
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_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data.");
|
|
} 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;
|
|
}
|
|
} while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION
|
|
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION
|
|
&& retries-- > 0);
|
|
|
|
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
|
|
error_setg(errp, "iSCSI: failed to send readcapacity10/16 command");
|
|
} else if (!iscsilun->block_size ||
|
|
iscsilun->block_size % BDRV_SECTOR_SIZE) {
|
|
error_setg(errp, "iSCSI: the target returned an invalid "
|
|
"block size of %d.", iscsilun->block_size);
|
|
}
|
|
if (task) {
|
|
scsi_free_scsi_task(task);
|
|
}
|
|
}
|
|
|
|
/* 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 */ }
|
|
},
|
|
};
|
|
|
|
static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun,
|
|
int evpd, int pc, void **inq, Error **errp)
|
|
{
|
|
int full_size;
|
|
struct scsi_task *task = NULL;
|
|
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
|
|
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
|
|
goto fail;
|
|
}
|
|
full_size = scsi_datain_getfullsize(task);
|
|
if (full_size > task->datain.size) {
|
|
scsi_free_scsi_task(task);
|
|
|
|
/* we need more data for the full list */
|
|
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size);
|
|
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
*inq = scsi_datain_unmarshall(task);
|
|
if (*inq == NULL) {
|
|
error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob");
|
|
goto fail_with_err;
|
|
}
|
|
|
|
return task;
|
|
|
|
fail:
|
|
error_setg(errp, "iSCSI: Inquiry command failed : %s",
|
|
iscsi_get_error(iscsi));
|
|
fail_with_err:
|
|
if (task != NULL) {
|
|
scsi_free_scsi_task(task);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void iscsi_detach_aio_context(BlockDriverState *bs)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsilun->iscsi),
|
|
false, NULL, NULL, NULL);
|
|
iscsilun->events = 0;
|
|
|
|
if (iscsilun->nop_timer) {
|
|
timer_del(iscsilun->nop_timer);
|
|
timer_free(iscsilun->nop_timer);
|
|
iscsilun->nop_timer = NULL;
|
|
}
|
|
if (iscsilun->event_timer) {
|
|
timer_del(iscsilun->event_timer);
|
|
timer_free(iscsilun->event_timer);
|
|
iscsilun->event_timer = NULL;
|
|
}
|
|
}
|
|
|
|
static void iscsi_attach_aio_context(BlockDriverState *bs,
|
|
AioContext *new_context)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
|
|
iscsilun->aio_context = new_context;
|
|
iscsi_set_events(iscsilun);
|
|
|
|
/* Set up a timer for sending out iSCSI NOPs */
|
|
iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context,
|
|
QEMU_CLOCK_REALTIME, SCALE_MS,
|
|
iscsi_nop_timed_event, iscsilun);
|
|
timer_mod(iscsilun->nop_timer,
|
|
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL);
|
|
|
|
/* Set up a timer for periodic calls to iscsi_set_events and to
|
|
* scan for command timeout */
|
|
iscsilun->event_timer = aio_timer_new(iscsilun->aio_context,
|
|
QEMU_CLOCK_REALTIME, SCALE_MS,
|
|
iscsi_timed_check_events, iscsilun);
|
|
timer_mod(iscsilun->event_timer,
|
|
qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL);
|
|
}
|
|
|
|
static void iscsi_modesense_sync(IscsiLun *iscsilun)
|
|
{
|
|
struct scsi_task *task;
|
|
struct scsi_mode_sense *ms = NULL;
|
|
iscsilun->write_protected = false;
|
|
iscsilun->dpofua = false;
|
|
|
|
task = iscsi_modesense6_sync(iscsilun->iscsi, iscsilun->lun,
|
|
1, SCSI_MODESENSE_PC_CURRENT,
|
|
0x3F, 0, 255);
|
|
if (task == NULL) {
|
|
error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s",
|
|
iscsi_get_error(iscsilun->iscsi));
|
|
goto out;
|
|
}
|
|
|
|
if (task->status != SCSI_STATUS_GOOD) {
|
|
error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable");
|
|
goto out;
|
|
}
|
|
ms = scsi_datain_unmarshall(task);
|
|
if (!ms) {
|
|
error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s",
|
|
iscsi_get_error(iscsilun->iscsi));
|
|
goto out;
|
|
}
|
|
iscsilun->write_protected = ms->device_specific_parameter & 0x80;
|
|
iscsilun->dpofua = ms->device_specific_parameter & 0x10;
|
|
|
|
out:
|
|
if (task) {
|
|
scsi_free_scsi_task(task);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We support iscsi url's on the form
|
|
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
|
*/
|
|
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
|
|
Error **errp)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct iscsi_context *iscsi = NULL;
|
|
struct iscsi_url *iscsi_url = NULL;
|
|
struct scsi_task *task = NULL;
|
|
struct scsi_inquiry_standard *inq = NULL;
|
|
struct scsi_inquiry_supported_pages *inq_vpd;
|
|
char *initiator_name = NULL;
|
|
QemuOpts *opts;
|
|
Error *local_err = NULL;
|
|
const char *filename;
|
|
int i, ret = 0, timeout = 0;
|
|
|
|
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
|
|
qemu_opts_absorb_qdict(opts, options, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
filename = qemu_opt_get(opts, "filename");
|
|
|
|
iscsi_url = iscsi_parse_full_url(iscsi, filename);
|
|
if (iscsi_url == NULL) {
|
|
error_setg(errp, "Failed to parse URL : %s", filename);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
|
|
initiator_name = parse_initiator_name(iscsi_url->target);
|
|
|
|
iscsi = iscsi_create_context(initiator_name);
|
|
if (iscsi == NULL) {
|
|
error_setg(errp, "iSCSI: Failed to create iSCSI context.");
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
|
error_setg(errp, "iSCSI: Failed to set target name.");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (iscsi_url->user[0] != '\0') {
|
|
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user,
|
|
iscsi_url->passwd);
|
|
if (ret != 0) {
|
|
error_setg(errp, "Failed to set initiator username and password");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* check if we got CHAP username/password via the options */
|
|
parse_chap(iscsi, iscsi_url->target, &local_err);
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
|
|
error_setg(errp, "iSCSI: Failed to set session type to normal.");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
|
|
|
|
/* check if we got HEADER_DIGEST via the options */
|
|
parse_header_digest(iscsi, iscsi_url->target, &local_err);
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* timeout handling is broken in libiscsi before 1.15.0 */
|
|
timeout = parse_timeout(iscsi_url->target);
|
|
#if defined(LIBISCSI_API_VERSION) && LIBISCSI_API_VERSION >= 20150621
|
|
iscsi_set_timeout(iscsi, timeout);
|
|
#else
|
|
if (timeout) {
|
|
error_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
|
|
}
|
|
#endif
|
|
|
|
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
|
|
error_setg(errp, "iSCSI: Failed to connect to LUN : %s",
|
|
iscsi_get_error(iscsi));
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
iscsilun->iscsi = iscsi;
|
|
iscsilun->aio_context = bdrv_get_aio_context(bs);
|
|
iscsilun->lun = iscsi_url->lun;
|
|
iscsilun->has_write_same = true;
|
|
|
|
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0,
|
|
(void **) &inq, errp);
|
|
if (task == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
iscsilun->type = inq->periperal_device_type;
|
|
scsi_free_scsi_task(task);
|
|
task = NULL;
|
|
|
|
iscsi_modesense_sync(iscsilun);
|
|
if (iscsilun->dpofua) {
|
|
bs->supported_write_flags = BDRV_REQ_FUA;
|
|
}
|
|
bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
|
|
|
|
/* Check the write protect flag of the LUN if we want to write */
|
|
if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) &&
|
|
iscsilun->write_protected) {
|
|
error_setg(errp, "Cannot open a write protected LUN as read-write");
|
|
ret = -EACCES;
|
|
goto out;
|
|
}
|
|
|
|
iscsi_readcapacity_sync(iscsilun, &local_err);
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun);
|
|
|
|
/* We don't have any emulation for devices other than disks and CD-ROMs, 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_DISK && iscsilun->type != TYPE_ROM) {
|
|
bs->sg = true;
|
|
}
|
|
|
|
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
|
SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES,
|
|
(void **) &inq_vpd, errp);
|
|
if (task == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
for (i = 0; i < inq_vpd->num_pages; i++) {
|
|
struct scsi_task *inq_task;
|
|
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
|
|
struct scsi_inquiry_block_limits *inq_bl;
|
|
switch (inq_vpd->pages[i]) {
|
|
case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
|
|
inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
|
SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING,
|
|
(void **) &inq_lbp, errp);
|
|
if (inq_task == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
memcpy(&iscsilun->lbp, inq_lbp,
|
|
sizeof(struct scsi_inquiry_logical_block_provisioning));
|
|
scsi_free_scsi_task(inq_task);
|
|
break;
|
|
case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS:
|
|
inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
|
SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS,
|
|
(void **) &inq_bl, errp);
|
|
if (inq_task == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
memcpy(&iscsilun->bl, inq_bl,
|
|
sizeof(struct scsi_inquiry_block_limits));
|
|
scsi_free_scsi_task(inq_task);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
scsi_free_scsi_task(task);
|
|
task = NULL;
|
|
|
|
iscsi_attach_aio_context(bs, iscsilun->aio_context);
|
|
|
|
/* Guess the internal cluster (page) size of the iscsi target by the means
|
|
* of opt_unmap_gran. Transfer the unmap granularity only if it has a
|
|
* reasonable size */
|
|
if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 &&
|
|
iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) {
|
|
iscsilun->cluster_sectors = (iscsilun->bl.opt_unmap_gran *
|
|
iscsilun->block_size) >> BDRV_SECTOR_BITS;
|
|
if (iscsilun->lbprz) {
|
|
ret = iscsi_allocmap_init(iscsilun, bs->open_flags);
|
|
}
|
|
}
|
|
|
|
out:
|
|
qemu_opts_del(opts);
|
|
g_free(initiator_name);
|
|
if (iscsi_url != NULL) {
|
|
iscsi_destroy_url(iscsi_url);
|
|
}
|
|
if (task != NULL) {
|
|
scsi_free_scsi_task(task);
|
|
}
|
|
|
|
if (ret) {
|
|
if (iscsi != NULL) {
|
|
if (iscsi_is_logged_in(iscsi)) {
|
|
iscsi_logout_sync(iscsi);
|
|
}
|
|
iscsi_destroy_context(iscsi);
|
|
}
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void iscsi_close(BlockDriverState *bs)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
struct iscsi_context *iscsi = iscsilun->iscsi;
|
|
|
|
iscsi_detach_aio_context(bs);
|
|
if (iscsi_is_logged_in(iscsi)) {
|
|
iscsi_logout_sync(iscsi);
|
|
}
|
|
iscsi_destroy_context(iscsi);
|
|
g_free(iscsilun->zeroblock);
|
|
iscsi_allocmap_free(iscsilun);
|
|
memset(iscsilun, 0, sizeof(IscsiLun));
|
|
}
|
|
|
|
static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp)
|
|
{
|
|
/* We don't actually refresh here, but just return data queried in
|
|
* iscsi_open(): iscsi targets don't change their limits. */
|
|
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff;
|
|
unsigned int block_size = MAX(BDRV_SECTOR_SIZE, iscsilun->block_size);
|
|
|
|
assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bs->sg);
|
|
|
|
bs->bl.request_alignment = block_size;
|
|
|
|
if (iscsilun->bl.max_xfer_len) {
|
|
max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len);
|
|
}
|
|
|
|
if (max_xfer_len * block_size < INT_MAX) {
|
|
bs->bl.max_transfer = max_xfer_len * iscsilun->block_size;
|
|
}
|
|
|
|
if (iscsilun->lbp.lbpu) {
|
|
if (iscsilun->bl.max_unmap < 0xffffffff / block_size) {
|
|
bs->bl.max_pdiscard =
|
|
iscsilun->bl.max_unmap * iscsilun->block_size;
|
|
}
|
|
bs->bl.pdiscard_alignment =
|
|
iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
|
|
} else {
|
|
bs->bl.pdiscard_alignment = iscsilun->block_size;
|
|
}
|
|
|
|
if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) {
|
|
bs->bl.max_pwrite_zeroes =
|
|
iscsilun->bl.max_ws_len * iscsilun->block_size;
|
|
}
|
|
if (iscsilun->lbp.lbpws) {
|
|
bs->bl.pwrite_zeroes_alignment =
|
|
iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
|
|
} else {
|
|
bs->bl.pwrite_zeroes_alignment = iscsilun->block_size;
|
|
}
|
|
if (iscsilun->bl.opt_xfer_len &&
|
|
iscsilun->bl.opt_xfer_len < INT_MAX / block_size) {
|
|
bs->bl.opt_transfer = pow2floor(iscsilun->bl.opt_xfer_len *
|
|
iscsilun->block_size);
|
|
}
|
|
}
|
|
|
|
/* Note that this will not re-establish a connection with an iSCSI target - it
|
|
* is effectively a NOP. */
|
|
static int iscsi_reopen_prepare(BDRVReopenState *state,
|
|
BlockReopenQueue *queue, Error **errp)
|
|
{
|
|
IscsiLun *iscsilun = state->bs->opaque;
|
|
|
|
if (state->flags & BDRV_O_RDWR && iscsilun->write_protected) {
|
|
error_setg(errp, "Cannot open a write protected LUN as read-write");
|
|
return -EACCES;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void iscsi_reopen_commit(BDRVReopenState *reopen_state)
|
|
{
|
|
IscsiLun *iscsilun = reopen_state->bs->opaque;
|
|
|
|
/* the cache.direct status might have changed */
|
|
if (iscsilun->allocmap != NULL) {
|
|
iscsi_allocmap_init(iscsilun, reopen_state->flags);
|
|
}
|
|
}
|
|
|
|
static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
Error *local_err = NULL;
|
|
|
|
if (iscsilun->type != TYPE_DISK) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
iscsi_readcapacity_sync(iscsilun, &local_err);
|
|
if (local_err != NULL) {
|
|
error_free(local_err);
|
|
return -EIO;
|
|
}
|
|
|
|
if (offset > iscsi_getlength(bs)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (iscsilun->allocmap != NULL) {
|
|
iscsi_allocmap_init(iscsilun, bs->open_flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp)
|
|
{
|
|
int ret = 0;
|
|
int64_t total_size = 0;
|
|
BlockDriverState *bs;
|
|
IscsiLun *iscsilun = NULL;
|
|
QDict *bs_options;
|
|
|
|
bs = bdrv_new();
|
|
|
|
/* Read out options */
|
|
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
|
|
BDRV_SECTOR_SIZE);
|
|
bs->opaque = g_new0(struct IscsiLun, 1);
|
|
iscsilun = bs->opaque;
|
|
|
|
bs_options = qdict_new();
|
|
qdict_put(bs_options, "filename", qstring_from_str(filename));
|
|
ret = iscsi_open(bs, bs_options, 0, NULL);
|
|
QDECREF(bs_options);
|
|
|
|
if (ret != 0) {
|
|
goto out;
|
|
}
|
|
iscsi_detach_aio_context(bs);
|
|
if (iscsilun->type != TYPE_DISK) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
if (bs->total_sectors < total_size) {
|
|
ret = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
if (iscsilun->iscsi != NULL) {
|
|
iscsi_destroy_context(iscsilun->iscsi);
|
|
}
|
|
g_free(bs->opaque);
|
|
bs->opaque = NULL;
|
|
bdrv_unref(bs);
|
|
return ret;
|
|
}
|
|
|
|
static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
bdi->unallocated_blocks_are_zero = iscsilun->lbprz;
|
|
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws;
|
|
bdi->cluster_size = iscsilun->cluster_sectors * BDRV_SECTOR_SIZE;
|
|
return 0;
|
|
}
|
|
|
|
static void iscsi_invalidate_cache(BlockDriverState *bs,
|
|
Error **errp)
|
|
{
|
|
IscsiLun *iscsilun = bs->opaque;
|
|
iscsi_allocmap_invalidate(iscsilun);
|
|
}
|
|
|
|
static QemuOptsList iscsi_create_opts = {
|
|
.name = "iscsi-create-opts",
|
|
.head = QTAILQ_HEAD_INITIALIZER(iscsi_create_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = BLOCK_OPT_SIZE,
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Virtual disk size"
|
|
},
|
|
{ /* end of list */ }
|
|
}
|
|
};
|
|
|
|
static BlockDriver bdrv_iscsi = {
|
|
.format_name = "iscsi",
|
|
.protocol_name = "iscsi",
|
|
|
|
.instance_size = sizeof(IscsiLun),
|
|
.bdrv_needs_filename = true,
|
|
.bdrv_file_open = iscsi_open,
|
|
.bdrv_close = iscsi_close,
|
|
.bdrv_create = iscsi_create,
|
|
.create_opts = &iscsi_create_opts,
|
|
.bdrv_reopen_prepare = iscsi_reopen_prepare,
|
|
.bdrv_reopen_commit = iscsi_reopen_commit,
|
|
.bdrv_invalidate_cache = iscsi_invalidate_cache,
|
|
|
|
.bdrv_getlength = iscsi_getlength,
|
|
.bdrv_get_info = iscsi_get_info,
|
|
.bdrv_truncate = iscsi_truncate,
|
|
.bdrv_refresh_limits = iscsi_refresh_limits,
|
|
|
|
.bdrv_co_get_block_status = iscsi_co_get_block_status,
|
|
.bdrv_co_pdiscard = iscsi_co_pdiscard,
|
|
.bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes,
|
|
.bdrv_co_readv = iscsi_co_readv,
|
|
.bdrv_co_writev_flags = iscsi_co_writev_flags,
|
|
.bdrv_co_flush_to_disk = iscsi_co_flush,
|
|
|
|
#ifdef __linux__
|
|
.bdrv_aio_ioctl = iscsi_aio_ioctl,
|
|
#endif
|
|
|
|
.bdrv_detach_aio_context = iscsi_detach_aio_context,
|
|
.bdrv_attach_aio_context = iscsi_attach_aio_context,
|
|
};
|
|
|
|
static void iscsi_block_init(void)
|
|
{
|
|
bdrv_register(&bdrv_iscsi);
|
|
}
|
|
|
|
block_init(iscsi_block_init);
|