Ejemplo n.º 1
0
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;
}
Ejemplo n.º 2
0
Archivo: iscsi.c Proyecto: 3a9LL/panda
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;
}
Ejemplo n.º 3
0
Archivo: iscsi.c Proyecto: 3a9LL/panda
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;
}
Ejemplo n.º 4
0
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;
}
Ejemplo n.º 5
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;
}
Ejemplo n.º 6
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;
}
Ejemplo n.º 7
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;
}
Ejemplo n.º 8
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;
    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;
}
Ejemplo n.º 9
0
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;
}