static BlockDriverAIOCB *
iscsi_aio_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = iscsilun->iscsi;
IscsiAIOCB *acb;
struct unmap_list list[1];
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
acb->iscsilun = iscsilun;
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
list[0].lba = sector_qemu2lun(sector_num, iscsilun);
list[0].num = nb_sectors * BDRV_SECTOR_SIZE / iscsilun->block_size;
acb->task = iscsi_unmap_task(iscsi, iscsilun->lun,
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));
qemu_aio_release(acb);
return NULL;
}
iscsi_set_events(iscsilun);
return &acb->common;
}
static BlockDriverAIOCB *
iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = iscsilun->iscsi;
IscsiAIOCB *acb;
size_t qemu_read_size, lun_read_size;
int i;
qemu_read_size = BDRV_SECTOR_SIZE * (size_t)nb_sectors;
acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
trace_iscsi_aio_readv(iscsi, sector_num, nb_sectors, opaque, acb);
acb->iscsilun = iscsilun;
acb->qiov = qiov;
acb->canceled = 0;
acb->read_size = qemu_read_size;
acb->buf = NULL;
/* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU
* may be misaligned to the LUN, so we may need to read some extra
* data.
*/
acb->read_offset = 0;
if (iscsilun->block_size > BDRV_SECTOR_SIZE) {
uint64_t bdrv_offset = BDRV_SECTOR_SIZE * sector_num;
acb->read_offset = bdrv_offset % iscsilun->block_size;
}
lun_read_size = (qemu_read_size + iscsilun->block_size
+ acb->read_offset - 1)
/ iscsilun->block_size * iscsilun->block_size;
acb->task = iscsi_read10_task(iscsi, iscsilun->lun,
sector_qemu2lun(sector_num, iscsilun),
lun_read_size, iscsilun->block_size,
0, 0, 0, 0, 0,
iscsi_aio_read10_cb, acb);
if (acb->task == NULL) {
error_report("iSCSI: Failed to send read10 command. %s",
iscsi_get_error(iscsi));
qemu_aio_release(acb);
return NULL;
}
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);
}
iscsi_set_events(iscsilun);
return &acb->common;
}
static BlockDriverAIOCB *
iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = iscsilun->iscsi;
IscsiAIOCB *acb;
size_t size;
int fua = 0;
/* set FUA on writes when cache mode is write through */
if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
fua = 1;
}
acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque);
trace_iscsi_aio_writev(iscsi, sector_num, nb_sectors, opaque, acb);
acb->iscsilun = iscsilun;
acb->qiov = qiov;
acb->canceled = 0;
/* XXX we should pass the iovec to write10 to avoid the extra copy */
/* this will allow us to get rid of 'buf' completely */
size = nb_sectors * BDRV_SECTOR_SIZE;
acb->buf = g_malloc(size);
qemu_iovec_to_buffer(acb->qiov, acb->buf);
acb->task = iscsi_write10_task(iscsi, iscsilun->lun,
sector_qemu2lun(sector_num, iscsilun),
acb->buf, size, iscsilun->block_size,
0, 0, fua, 0, 0,
iscsi_aio_write10_cb, acb);
if (acb->task == NULL) {
error_report("iSCSI: Failed to send write10 command. %s",
iscsi_get_error(iscsi));
g_free(acb->buf);
qemu_aio_release(acb);
return NULL;
}
iscsi_set_events(iscsilun);
return &acb->common;
}
static int iscsi_aio_discard_acb(IscsiAIOCB *acb) {
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
struct unmap_list list[1];
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->buf = NULL;
list[0].lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
list[0].num = acb->nb_sectors * BDRV_SECTOR_SIZE / acb->iscsilun->block_size;
acb->task = iscsi_unmap_task(iscsi, acb->iscsilun->lun,
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));
return -1;
}
return 0;
}
static int
iscsi_aio_readv_acb(IscsiAIOCB *acb)
{
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
size_t size;
uint64_t lba;
uint32_t num_sectors;
int ret;
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
int i;
#endif
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->buf = NULL;
size = acb->nb_sectors * BDRV_SECTOR_SIZE;
acb->task = malloc(sizeof(struct scsi_task));
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi READ16 "
"command. %s", iscsi_get_error(iscsi));
return -1;
}
memset(acb->task, 0, sizeof(struct scsi_task));
acb->task->xfer_dir = SCSI_XFER_READ;
acb->task->expxferlen = size;
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun);
switch (acb->iscsilun->type) {
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;
}
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
iscsi_aio_read16_cb,
NULL,
acb);
if (ret != 0) {
scsi_free_scsi_task(acb->task);
return -1;
}
#if defined(LIBISCSI_FEATURE_IOVECTOR)
scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
#else
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);
}
#endif
return 0;
}
static int
iscsi_aio_writev_acb(IscsiAIOCB *acb)
{
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
size_t size;
uint32_t num_sectors;
uint64_t lba;
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
struct iscsi_data data;
#endif
int ret;
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->buf = NULL;
/* this will allow us to get rid of 'buf' completely */
size = acb->nb_sectors * BDRV_SECTOR_SIZE;
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
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;
}
#endif
acb->task = malloc(sizeof(struct scsi_task));
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
"command. %s", iscsi_get_error(iscsi));
return -1;
}
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;
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun);
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
acb->task->expxferlen = size;
#if defined(LIBISCSI_FEATURE_IOVECTOR)
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
iscsi_aio_write16_cb,
NULL,
acb);
#else
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
iscsi_aio_write16_cb,
&data,
acb);
#endif
if (ret != 0) {
scsi_free_scsi_task(acb->task);
g_free(acb->buf);
return -1;
}
#if defined(LIBISCSI_FEATURE_IOVECTOR)
scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
#endif
return 0;
}
static BlockDriverAIOCB *
iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = iscsilun->iscsi;
IscsiAIOCB *acb;
size_t qemu_read_size;
int i;
uint64_t lba;
uint32_t num_sectors;
qemu_read_size = BDRV_SECTOR_SIZE * (size_t)nb_sectors;
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
trace_iscsi_aio_readv(iscsi, sector_num, nb_sectors, opaque, acb);
acb->iscsilun = iscsilun;
acb->qiov = qiov;
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->read_size = qemu_read_size;
acb->buf = NULL;
/* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU
* may be misaligned to the LUN, so we may need to read some extra
* data.
*/
acb->read_offset = 0;
if (iscsilun->block_size > BDRV_SECTOR_SIZE) {
uint64_t bdrv_offset = BDRV_SECTOR_SIZE * sector_num;
acb->read_offset = bdrv_offset % iscsilun->block_size;
}
num_sectors = (qemu_read_size + iscsilun->block_size
+ acb->read_offset - 1)
/ iscsilun->block_size;
acb->task = malloc(sizeof(struct scsi_task));
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi READ16 "
"command. %s", iscsi_get_error(iscsi));
qemu_aio_release(acb);
return NULL;
}
memset(acb->task, 0, sizeof(struct scsi_task));
acb->task->xfer_dir = SCSI_XFER_READ;
lba = sector_qemu2lun(sector_num, iscsilun);
acb->task->expxferlen = qemu_read_size;
switch (iscsilun->type) {
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;
}
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
iscsi_aio_read16_cb,
NULL,
acb) != 0) {
scsi_free_scsi_task(acb->task);
qemu_aio_release(acb);
return NULL;
}
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);
}
iscsi_set_events(iscsilun);
return &acb->common;
}
static BlockDriverAIOCB *
iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = iscsilun->iscsi;
IscsiAIOCB *acb;
size_t size;
uint32_t num_sectors;
uint64_t lba;
struct iscsi_data data;
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
trace_iscsi_aio_writev(iscsi, sector_num, nb_sectors, opaque, acb);
acb->iscsilun = iscsilun;
acb->qiov = qiov;
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
/* XXX we should pass the iovec to write16 to avoid the extra copy */
/* this will allow us to get rid of 'buf' completely */
size = nb_sectors * BDRV_SECTOR_SIZE;
data.size = MIN(size, acb->qiov->size);
/* if the iovec only contains one buffer we can pass it directly */
if (acb->qiov->niov == 1) {
acb->buf = NULL;
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;
}
acb->task = malloc(sizeof(struct scsi_task));
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
"command. %s", iscsi_get_error(iscsi));
qemu_aio_release(acb);
return NULL;
}
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;
lba = sector_qemu2lun(sector_num, iscsilun);
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);
num_sectors = size / iscsilun->block_size;
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
acb->task->expxferlen = size;
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
iscsi_aio_write16_cb,
&data,
acb) != 0) {
scsi_free_scsi_task(acb->task);
g_free(acb->buf);
qemu_aio_release(acb);
return NULL;
}
iscsi_set_events(iscsilun);
return &acb->common;
}
static int
iscsi_aio_readv_acb(IscsiAIOCB *acb)
{
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
uint64_t lba;
uint32_t num_sectors;
int ret;
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
int i;
#endif
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->buf = NULL;
/* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU
* may be misaligned to the LUN, so we may need to read some extra
* data.
*/
acb->read_offset = 0;
if (acb->iscsilun->block_size > BDRV_SECTOR_SIZE) {
uint64_t bdrv_offset = BDRV_SECTOR_SIZE * acb->sector_num;
acb->read_offset = bdrv_offset % acb->iscsilun->block_size;
}
num_sectors = (acb->read_size + acb->iscsilun->block_size
+ acb->read_offset - 1)
/ acb->iscsilun->block_size;
acb->task = malloc(sizeof(struct scsi_task));
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi READ16 "
"command. %s", iscsi_get_error(iscsi));
return -1;
}
memset(acb->task, 0, sizeof(struct scsi_task));
acb->task->xfer_dir = SCSI_XFER_READ;
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun);
acb->task->expxferlen = acb->read_size;
switch (acb->iscsilun->type) {
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;
}
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task,
iscsi_aio_read16_cb,
NULL,
acb);
if (ret != 0) {
return -1;
}
#if defined(LIBISCSI_FEATURE_IOVECTOR)
scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
#else
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);
}
#endif
return 0;
}