C++ scsi_free_scsi_task函数代码示例

void write10_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
	struct write_task *wt = (struct write_task *)private_data;
	struct scsi_task *task = command_data;
	struct client *client = wt->client;

	if (status == SCSI_STATUS_CHECK_CONDITION) {
		printf("Write10 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq);
		scsi_free_scsi_task(task);
		exit(10);
	}
	if (status != SCSI_STATUS_GOOD) {
		printf("Write10 failed with %s\n", iscsi_get_error(iscsi));
		scsi_free_scsi_task(task);
		exit(10);
	}

	client->in_flight--;
	fill_read_queue(client);

	if ((client->in_flight == 0) && (client->pos == client->src_num_blocks)) {
		client->finished = 1;
	}
	scsi_free_scsi_task(wt->rt);
	scsi_free_scsi_task(task);
	free(wt);
}

static void
iscsi_aio_read10_cb(struct iscsi_context *iscsi, int status,
                    void *command_data, void *opaque)
{
    IscsiAIOCB *acb = opaque;

    trace_iscsi_aio_read10_cb(iscsi, status, acb, acb->canceled);

    if (acb->canceled != 0) {
        qemu_aio_release(acb);
        scsi_free_scsi_task(acb->task);
        acb->task = NULL;
        return;
    }

    acb->status = 0;
    if (status != 0) {
        error_report("Failed to read10 data from iSCSI lun. %s",
                     iscsi_get_error(iscsi));
        acb->status = -EIO;
    }

    iscsi_schedule_bh(iscsi_readv_writev_bh_cb, acb);
    scsi_free_scsi_task(acb->task);
    acb->task = NULL;
}

static void
iscsi_readcapacity10_cb(struct iscsi_context *iscsi, int status,
                        void *command_data, void *opaque)
{
    struct IscsiTask *itask = opaque;
    struct scsi_readcapacity10 *rc10;
    struct scsi_task *task = command_data;

    if (status != 0) {
        error_report("iSCSI: Failed to read capacity of iSCSI lun. %s",
                     iscsi_get_error(iscsi));
        itask->status   = 1;
        itask->complete = 1;
        scsi_free_scsi_task(task);
        return;
    }

    rc10 = scsi_datain_unmarshall(task);
    if (rc10 == NULL) {
        error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
        itask->status   = 1;
        itask->complete = 1;
        scsi_free_scsi_task(task);
        return;
    }

    itask->iscsilun->block_size = rc10->block_size;
    itask->iscsilun->num_blocks = rc10->lba;
    itask->bs->total_sectors = (uint64_t)rc10->lba *
                               rc10->block_size / BDRV_SECTOR_SIZE ;

    itask->status   = 0;
    itask->complete = 1;
    scsi_free_scsi_task(task);
}

void list_luns(const char *target, const char *portal)
{
	struct iscsi_context *iscsi;
	struct scsi_task *task;
	struct scsi_reportluns_list *list;
	int full_report_size;
	int i;

	iscsi = iscsi_create_context(initiator);
	if (iscsi == NULL) {
		printf("Failed to create context\n");
		exit(10);
	}
	if (iscsi_set_targetname(iscsi, target)) {
		fprintf(stderr, "Failed to set target name\n");
		exit(10);
	}
	iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL);
	iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
	if (iscsi_connect_sync(iscsi, portal) != 0) {
		printf("iscsi_connect failed. %s\n", iscsi_get_error(iscsi));
		exit(10);
	}

	if (iscsi_login_sync(iscsi) != 0) {
		fprintf(stderr, "login failed :%s\n", iscsi_get_error(iscsi));
		exit(10);
	}


	/* get initial reportluns data, all targets can report 16 bytes but some
	 * fail if we ask for too much.
	 */
	if ((task = iscsi_reportluns_sync(iscsi, 0, 16)) == NULL) {
		fprintf(stderr, "reportluns failed : %s\n", iscsi_get_error(iscsi));
		exit(10);
	}
	full_report_size = scsi_datain_getfullsize(task);
	if (full_report_size > task->datain.size) {
		scsi_free_scsi_task(task);

		/* we need more data for the full list */
		if ((task = iscsi_reportluns_sync(iscsi, 0, full_report_size)) == NULL) {
			fprintf(stderr, "reportluns failed : %s\n", iscsi_get_error(iscsi));
			exit(10);
		}
	}

	list = scsi_datain_unmarshall(task);
	if (list == NULL) {
		fprintf(stderr, "failed to unmarshall reportluns datain blob\n");
		exit(10);
	}
	for (i=0; i < (int)list->num; i++) {
		show_lun(iscsi, list->luns[i]);
	}

	scsi_free_scsi_task(task);
	iscsi_destroy_context(iscsi);
}

void do_inquiry(struct iscsi_context *iscsi, int lun, int evpd, int pc)
{
	struct scsi_task *task;
	int full_size;
	void *inq;

	/* See how big this inquiry data is */
	task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
	if (task == NULL || task->status != SCSI_STATUS_GOOD) {
		fprintf(stderr, "Inquiry command failed : %s\n", iscsi_get_error(iscsi));
		exit(10);
	}

	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 */
		if ((task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size)) == NULL) {
			fprintf(stderr, "Inquiry command failed : %s\n", iscsi_get_error(iscsi));
			exit(10);
		}
	}

	inq = scsi_datain_unmarshall(task);
	if (inq == NULL) {
		fprintf(stderr, "failed to unmarshall inquiry datain blob\n");
		exit(10);
	}

	if (evpd == 0) {
		inquiry_standard(inq);
	} else {
		switch (pc) {
		case SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES:
			inquiry_supported_pages(inq);
			break;
		case SCSI_INQUIRY_PAGECODE_UNIT_SERIAL_NUMBER:
			inquiry_unit_serial_number(inq);
			break;
		case SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION:
			inquiry_device_identification(inq);
			break;
		case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS:
			inquiry_block_limits(inq);
			break;
		case SCSI_INQUIRY_PAGECODE_BLOCK_DEVICE_CHARACTERISTICS:
			inquiry_block_device_characteristics(inq);
			break;
		case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
			inquiry_logical_block_provisioning(inq);
			break;
		default:
			fprintf(stderr, "Usupported pagecode:0x%02x\n", pc);
		}
	}
	scsi_free_scsi_task(task);
}

void
test_report_supported_opcodes_servactv(void)
{
	int i, ret;
	struct scsi_task *rso_task;
	struct scsi_report_supported_op_codes *rsoc;

	logging(LOG_VERBOSE, LOG_BLANK_LINE);
	logging(LOG_VERBOSE, "Test READ_SUPPORTED_OPCODES SERVACTV flag");


	ret = report_supported_opcodes(
		sd, &rso_task,
		0, SCSI_REPORT_SUPPORTING_OPS_ALL, 0, 0,
		65535,
		EXPECT_STATUS_GOOD);
	if (ret == -2) {
		logging(LOG_NORMAL, "[SKIPPED] READ_SUPPORTED_OPCODES is not "
			"implemented.");
		CU_PASS("READ_SUPPORTED_OPCODES is not implemented.");
		scsi_free_scsi_task(rso_task);
		return;
	}
	CU_ASSERT_EQUAL(ret, 0);
	if (ret != 0) {
		scsi_free_scsi_task(rso_task);
		return;
	}
	
	logging(LOG_VERBOSE, "Unmarshall the DATA-IN buffer");
	rsoc = scsi_datain_unmarshall(rso_task);
	CU_ASSERT_NOT_EQUAL(rsoc, NULL);
	if (!rsoc) {
		logging(LOG_NORMAL, "[FAILED] Target did not return any data "
			"for ReportSupportedOpcodes\n");
		CU_FAIL("Target did not return any data for "
			"ReportSupportedOpcodes");
		return;
	}


	logging(LOG_VERBOSE, "Verify that when SERVACTV is clear then "
		"ServiceAction must be zero.");
	for (i = 0; i < rsoc->num_descriptors; i++) {
		if (!rsoc->descriptors[i].servactv && rsoc->descriptors[i].sa) {
			logging(LOG_NORMAL, "[FAILED] ServiceAction is "
				"non-zero but SERVACTV is clear");
			CU_FAIL("[FAILED] ServiceAction is "
				"non-zero but SERVACTV is clear");
		}
	}

	scsi_free_scsi_task(rso_task);
}

int T0211_read12_rdprotect(const char *initiator, const char *url)
{
    struct iscsi_context *iscsi;
    struct scsi_task *task;
    int ret = 0, i, lun;

    printf("0211_read12_rdprotect:\n");
    printf("======================\n");
    if (show_info) {
        printf("Test how READ12 handles the rdprotect bits\n");
        printf("1, Any non-zero valued for rdprotect should fail.\n");
        printf("\n");
        return 0;
    }

    iscsi = iscsi_context_login(initiator, url, &lun);
    if (iscsi == NULL) {
        printf("Failed to login to target\n");
        return -1;
    }


    printf("Read12 with RDPROTECT ");
    for (i = 1; i <= 7; i++) {
        task = iscsi_read12_sync(iscsi, lun, 0, block_size, block_size, i, 0, 0, 0, 0);
        if (task == NULL) {
            printf("[FAILED]\n");
            printf("Failed to send read12 command: %s\n", iscsi_get_error(iscsi));
            ret = -1;
            goto finished;
        }
        if (task->status        != SCSI_STATUS_CHECK_CONDITION
                || task->sense.key  != SCSI_SENSE_ILLEGAL_REQUEST
                || task->sense.ascq != SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB) {
            printf("[FAILED]\n");
            printf("Read12 with RDPROTECT!=0 should have failed with CHECK_CONDITION/ILLEGAL_REQUEST/INVALID_FIELD_IN_CDB\n");
            ret = -1;
            scsi_free_scsi_task(task);
            goto finished;
        }
        scsi_free_scsi_task(task);
    }
    printf("[OK]\n");


finished:
    iscsi_logout_sync(iscsi);
    iscsi_destroy_context(iscsi);
    return ret;
}

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;

    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->read_size   = BDRV_SECTOR_SIZE * (size_t)acb->nb_sectors;
    acb->retries     = ISCSI_CMD_RETRIES;

    if (iscsi_aio_readv_acb(acb) != 0) {
        if (acb->task) {
            scsi_free_scsi_task(acb->task);
        }
        qemu_aio_release(acb);
        return NULL;
    }

    iscsi_set_events(iscsilun);
    return &acb->common;
}

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) {
        if (acb->task) {
            scsi_free_scsi_task(acb->task);
        }
        qemu_aio_release(acb);
        return NULL;
    }

    iscsi_set_events(iscsilun);

    return &acb->common;
}

static void
iscsi_unmap_cb(struct iscsi_context *iscsi, int status,
                     void *command_data, void *opaque)
{
    IscsiAIOCB *acb = opaque;

    if (acb->canceled != 0) {
        return;
    }

    acb->status = 0;
    if (status != 0) {
        if (status == SCSI_STATUS_CHECK_CONDITION
            && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION
            && acb->retries-- > 0) {
            scsi_free_scsi_task(acb->task);
            acb->task = NULL;
            if (iscsi_aio_discard_acb(acb) == 0) {
                iscsi_set_events(acb->iscsilun);
                return;
            }
        }
        error_report("Failed to unmap data on iSCSI lun. %s",
                     iscsi_get_error(iscsi));
        acb->status = -EIO;
    }

    iscsi_schedule_bh(acb);
}

void read10_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
	struct client *client = (struct client *)private_data;
	struct scsi_task *task = command_data;
	struct write_task *wt;

	if (status == SCSI_STATUS_CHECK_CONDITION) {
		printf("Read10 failed with sense key:%d ascq:%04x\n", task->sense.key, task->sense.ascq);
		exit(10);
	}

	wt = malloc(sizeof(struct write_task));
	wt->rt = task;
	wt->client = client;

	if (iscsi_write10_task(client->dst_iscsi,
			client->dst_lun,
			task->params.read10.lba,
			task->datain.data,
			task->datain.size,
			client->dst_blocksize,
			0, 0, 0, 0, 0,
			write10_cb, wt) == NULL) {
		printf("failed to send read10 command\n");
		scsi_free_scsi_task(task);
		exit(10);
	}
}

void
test_teardown(void)
{
	free(read_write_buf);
	read_write_buf = NULL;
	scsi_free_scsi_task(task);
	task = NULL;
}

void iscsi_free_scsi_cbdata(struct iscsi_scsi_cbdata *scsi_cbdata)
{
    if (scsi_cbdata == NULL) {
        return;
    }
    if (scsi_cbdata->task == NULL) {
        scsi_free_scsi_task(scsi_cbdata->task);
        scsi_cbdata->task = NULL;
    }
    free(scsi_cbdata);
}

ssize_t write(int fd, const void *buf, size_t count)
{
	if ((iscsi_fd_list[fd].is_iscsi == 1) && (iscsi_fd_list[fd].in_flight == 0)) {
		uint64_t offset;
		uint64_t num_blocks, lba;
		struct scsi_task *task;

		if (iscsi_fd_list[fd].dup2fd >= 0) {
			return write(iscsi_fd_list[fd].dup2fd, buf, count);
		}
		if (iscsi_fd_list[fd].offset%iscsi_fd_list[fd].block_size) {
			errno = EINVAL;
			return -1;
		}
		if (count%iscsi_fd_list[fd].block_size) {
			errno = EINVAL;
			return -1;
		}

                iscsi_fd_list[fd].lbasd_cache_valid = 0;

		offset = iscsi_fd_list[fd].offset;
		num_blocks = count/iscsi_fd_list[fd].block_size;
		lba = offset / iscsi_fd_list[fd].block_size;

		/* Don't try to read beyond the last LBA */
		if (lba >= iscsi_fd_list[fd].num_blocks) {
			return 0;
		}
		/* Trim num_blocks requested to last lba */
		if ((lba + num_blocks) > iscsi_fd_list[fd].num_blocks) {
			num_blocks = iscsi_fd_list[fd].num_blocks - lba;
			count = num_blocks * iscsi_fd_list[fd].block_size;
		}

		iscsi_fd_list[fd].in_flight = 1;
		LD_ISCSI_DPRINTF(4,"write16_sync: lun %d, lba %"PRIu64", num_blocks: %"PRIu64", block_size: %d, offset: %"PRIu64" count: %lu",iscsi_fd_list[fd].lun,lba,num_blocks,iscsi_fd_list[fd].block_size,offset,(unsigned long)count);
		task = iscsi_write16_sync(iscsi_fd_list[fd].iscsi, iscsi_fd_list[fd].lun, lba, (unsigned char *) buf, count, iscsi_fd_list[fd].block_size, 0, 0, 0, 0, 0);
		iscsi_fd_list[fd].in_flight = 0;
		if (task == NULL || task->status != SCSI_STATUS_GOOD) {
			LD_ISCSI_DPRINTF(0,"failed to send write16 command");
			errno = EIO;
			return -1;
		}

		iscsi_fd_list[fd].offset += count;
		scsi_free_scsi_task(task);

		return count;
	}

	return real_write(fd, buf, count);
}

static void
iscsi_bh_cb(void *p)
{
    IscsiAIOCB *acb = p;

    qemu_bh_delete(acb->bh);

    if (acb->canceled == 0) {
        acb->common.cb(acb->common.opaque, acb->status);
    }

    if (acb->task != NULL) {
        scsi_free_scsi_task(acb->task);
        acb->task = NULL;
    }

    qemu_aio_release(acb);
}