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authorChangpeng Liu <changpeng.liu@intel.com>2017-07-20 17:16:29 +0800
committerYuanhan Liu <yliu@fridaylinux.org>2017-07-19 22:49:47 +0300
commitdb75c7af19bb989ec18653a997113fcd9e72d485 (patch)
tree9d3566610e7e74cebeae166a27ab857e268cc34c /examples/vhost_scsi
parent78b2e3bae1af7fc8b9994193ff90846fa5520eb7 (diff)
downloaddpdk-db75c7af19bb989ec18653a997113fcd9e72d485.zip
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examples/vhost_scsi: introduce a new sample app
vhost-user protocol is common to many virtio devices, such as virtio_net/virtio_scsi/virtio_blk. Since DPDK vhost library removed the NET specific data structures, the vhost library is common to other virtio devices, such as virtio-scsi. Here we introduce a simple memory based block device that can be presented to Guest VM through vhost-user-scsi-pci controller. Similar with vhost-net, the sample application will process the I/Os sent via virt rings. Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Diffstat (limited to 'examples/vhost_scsi')
-rw-r--r--examples/vhost_scsi/Makefile59
-rw-r--r--examples/vhost_scsi/scsi.c539
-rw-r--r--examples/vhost_scsi/scsi_spec.h493
-rw-r--r--examples/vhost_scsi/vhost_scsi.c474
-rw-r--r--examples/vhost_scsi/vhost_scsi.h108
5 files changed, 1673 insertions, 0 deletions
diff --git a/examples/vhost_scsi/Makefile b/examples/vhost_scsi/Makefile
new file mode 100644
index 0000000..0306a6a
--- /dev/null
+++ b/examples/vhost_scsi/Makefile
@@ -0,0 +1,59 @@
+# BSD LICENSE
+#
+# Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+ifneq ($(CONFIG_RTE_EXEC_ENV),"linuxapp")
+$(info This application can only operate in a linuxapp environment, \
+please change the definition of the RTE_TARGET environment variable)
+all:
+else
+
+# binary name
+APP = vhost-scsi
+
+# all source are stored in SRCS-y
+SRCS-y := scsi.c vhost_scsi.c
+
+CFLAGS += -O2 -D_FILE_OFFSET_BITS=64
+CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -D_GNU_SOURCE
+
+include $(RTE_SDK)/mk/rte.extapp.mk
+
+endif
diff --git a/examples/vhost_scsi/scsi.c b/examples/vhost_scsi/scsi.c
new file mode 100644
index 0000000..54d3104
--- /dev/null
+++ b/examples/vhost_scsi/scsi.c
@@ -0,0 +1,539 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * This work is largely based on the "vhost-user-scsi" implementation by
+ * SPDK(https://github.com/spdk/spdk).
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <assert.h>
+#include <ctype.h>
+#include <string.h>
+#include <stddef.h>
+
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_byteorder.h>
+
+#include "vhost_scsi.h"
+#include "scsi_spec.h"
+
+#define INQ_OFFSET(field) (offsetof(struct scsi_cdb_inquiry_data, field) + \
+ sizeof(((struct scsi_cdb_inquiry_data *)0x0)->field))
+
+static void
+vhost_strcpy_pad(void *dst, const char *src, size_t size, int pad)
+{
+ size_t len;
+
+ len = strlen(src);
+ if (len < size) {
+ memcpy(dst, src, len);
+ memset((char *)dst + len, pad, size - len);
+ } else {
+ memcpy(dst, src, size);
+ }
+}
+
+static int
+vhost_hex2bin(char ch)
+{
+ if ((ch >= '0') && (ch <= '9'))
+ return ch - '0';
+ ch = tolower(ch);
+ if ((ch >= 'a') && (ch <= 'f'))
+ return ch - 'a' + 10;
+ return (int)ch;
+}
+
+static void
+vhost_bdev_scsi_set_naa_ieee_extended(const char *name, uint8_t *buf)
+{
+ int i, value, count = 0;
+ uint64_t *temp64, local_value;
+
+ for (i = 0; (i < 16) && (name[i] != '\0'); i++) {
+ value = vhost_hex2bin(name[i]);
+ if (i % 2)
+ buf[count++] |= value << 4;
+ else
+ buf[count] = value;
+ }
+
+ local_value = *(uint64_t *)buf;
+ /*
+ * see spc3r23 7.6.3.6.2,
+ * NAA IEEE Extended identifer format
+ */
+ local_value &= 0x0fff000000ffffffull;
+ /* NAA 02, and 00 03 47 for IEEE Intel */
+ local_value |= 0x2000000347000000ull;
+
+ temp64 = (uint64_t *)buf;
+ *temp64 = rte_cpu_to_be_64(local_value);
+}
+
+static void
+scsi_task_build_sense_data(struct vhost_scsi_task *task, int sk,
+ int asc, int ascq)
+{
+ uint8_t *cp;
+ int resp_code;
+
+ resp_code = 0x70; /* Current + Fixed format */
+
+ /* Sense Data */
+ cp = (uint8_t *)task->resp->sense;
+
+ /* VALID(7) RESPONSE CODE(6-0) */
+ cp[0] = 0x80 | resp_code;
+ /* Obsolete */
+ cp[1] = 0;
+ /* FILEMARK(7) EOM(6) ILI(5) SENSE KEY(3-0) */
+ cp[2] = sk & 0xf;
+ /* INFORMATION */
+ memset(&cp[3], 0, 4);
+
+ /* ADDITIONAL SENSE LENGTH */
+ cp[7] = 10;
+
+ /* COMMAND-SPECIFIC INFORMATION */
+ memset(&cp[8], 0, 4);
+ /* ADDITIONAL SENSE CODE */
+ cp[12] = asc;
+ /* ADDITIONAL SENSE CODE QUALIFIER */
+ cp[13] = ascq;
+ /* FIELD REPLACEABLE UNIT CODE */
+ cp[14] = 0;
+
+ /* SKSV(7) SENSE KEY SPECIFIC(6-0,7-0,7-0) */
+ cp[15] = 0;
+ cp[16] = 0;
+ cp[17] = 0;
+
+ /* SenseLength */
+ task->resp->sense_len = 18;
+}
+
+static void
+scsi_task_set_status(struct vhost_scsi_task *task, int sc, int sk,
+ int asc, int ascq)
+{
+ if (sc == SCSI_STATUS_CHECK_CONDITION)
+ scsi_task_build_sense_data(task, sk, asc, ascq);
+ task->resp->status = sc;
+}
+
+static int
+vhost_bdev_scsi_inquiry_command(struct vhost_block_dev *bdev,
+ struct vhost_scsi_task *task)
+{
+ int hlen = 0;
+ uint32_t alloc_len = 0;
+ uint16_t len = 0;
+ uint16_t *temp16;
+ int pc;
+ int pd;
+ int evpd;
+ int i;
+ uint8_t *buf;
+ struct scsi_cdb_inquiry *inq;
+
+ inq = (struct scsi_cdb_inquiry *)task->req->cdb;
+
+ assert(task->iovs_cnt == 1);
+
+ /* At least 36Bytes for inquiry command */
+ if (task->data_len < 0x24)
+ goto inq_error;
+
+ pd = SPC_PERIPHERAL_DEVICE_TYPE_DISK;
+ pc = inq->page_code;
+ evpd = inq->evpd & 0x1;
+
+ if (!evpd && pc)
+ goto inq_error;
+
+ if (evpd) {
+ struct scsi_vpd_page *vpage = (struct scsi_vpd_page *)
+ task->iovs[0].iov_base;
+
+ /* PERIPHERAL QUALIFIER(7-5) PERIPHERAL DEVICE TYPE(4-0) */
+ vpage->peripheral = pd;
+ /* PAGE CODE */
+ vpage->page_code = pc;
+
+ switch (pc) {
+ case SPC_VPD_SUPPORTED_VPD_PAGES:
+ hlen = 4;
+ vpage->params[0] = SPC_VPD_SUPPORTED_VPD_PAGES;
+ vpage->params[1] = SPC_VPD_UNIT_SERIAL_NUMBER;
+ vpage->params[2] = SPC_VPD_DEVICE_IDENTIFICATION;
+ len = 3;
+ /* PAGE LENGTH */
+ vpage->alloc_len = rte_cpu_to_be_16(len);
+ break;
+ case SPC_VPD_UNIT_SERIAL_NUMBER:
+ hlen = 4;
+ strncpy((char *)vpage->params, bdev->name, 32);
+ vpage->alloc_len = rte_cpu_to_be_16(32);
+ break;
+ case SPC_VPD_DEVICE_IDENTIFICATION:
+ buf = vpage->params;
+ struct scsi_desig_desc *desig;
+
+ hlen = 4;
+ /* NAA designator */
+ desig = (struct scsi_desig_desc *)buf;
+ desig->code_set = SPC_VPD_CODE_SET_BINARY;
+ desig->protocol_id = SPC_PROTOCOL_IDENTIFIER_ISCSI;
+ desig->type = SPC_VPD_IDENTIFIER_TYPE_NAA;
+ desig->association = SPC_VPD_ASSOCIATION_LOGICAL_UNIT;
+ desig->reserved0 = 0;
+ desig->piv = 1;
+ desig->reserved1 = 0;
+ desig->len = 8;
+ vhost_bdev_scsi_set_naa_ieee_extended(bdev->name,
+ desig->desig);
+ len = sizeof(struct scsi_desig_desc) + 8;
+
+ buf += sizeof(struct scsi_desig_desc) + desig->len;
+
+ /* T10 Vendor ID designator */
+ desig = (struct scsi_desig_desc *)buf;
+ desig->code_set = SPC_VPD_CODE_SET_ASCII;
+ desig->protocol_id = SPC_PROTOCOL_IDENTIFIER_ISCSI;
+ desig->type = SPC_VPD_IDENTIFIER_TYPE_T10_VENDOR_ID;
+ desig->association = SPC_VPD_ASSOCIATION_LOGICAL_UNIT;
+ desig->reserved0 = 0;
+ desig->piv = 1;
+ desig->reserved1 = 0;
+ desig->len = 8 + 16 + 32;
+ strncpy((char *)desig->desig, "INTEL", 8);
+ vhost_strcpy_pad((char *)&desig->desig[8],
+ bdev->product_name, 16, ' ');
+ strncpy((char *)&desig->desig[24], bdev->name, 32);
+ len += sizeof(struct scsi_desig_desc) + 8 + 16 + 32;
+
+ buf += sizeof(struct scsi_desig_desc) + desig->len;
+
+ /* SCSI Device Name designator */
+ desig = (struct scsi_desig_desc *)buf;
+ desig->code_set = SPC_VPD_CODE_SET_UTF8;
+ desig->protocol_id = SPC_PROTOCOL_IDENTIFIER_ISCSI;
+ desig->type = SPC_VPD_IDENTIFIER_TYPE_SCSI_NAME;
+ desig->association = SPC_VPD_ASSOCIATION_TARGET_DEVICE;
+ desig->reserved0 = 0;
+ desig->piv = 1;
+ desig->reserved1 = 0;
+ desig->len = snprintf((char *)desig->desig,
+ 255, "%s", bdev->name);
+ len += sizeof(struct scsi_desig_desc) + desig->len;
+
+ buf += sizeof(struct scsi_desig_desc) + desig->len;
+ vpage->alloc_len = rte_cpu_to_be_16(len);
+ break;
+ default:
+ goto inq_error;
+ }
+
+ } else {
+ struct scsi_cdb_inquiry_data *inqdata =
+ (struct scsi_cdb_inquiry_data *)task->iovs[0].iov_base;
+ /* Standard INQUIRY data */
+ /* PERIPHERAL QUALIFIER(7-5) PERIPHERAL DEVICE TYPE(4-0) */
+ inqdata->peripheral = pd;
+
+ /* RMB(7) */
+ inqdata->rmb = 0;
+
+ /* VERSION */
+ /* See SPC3/SBC2/MMC4/SAM2 for more details */
+ inqdata->version = SPC_VERSION_SPC3;
+
+ /* NORMACA(5) HISUP(4) RESPONSE DATA FORMAT(3-0) */
+ /* format 2 */ /* hierarchical support */
+ inqdata->response = 2 | 1 << 4;
+
+ hlen = 5;
+
+ /* SCCS(7) ACC(6) TPGS(5-4) 3PC(3) PROTECT(0) */
+ /* Not support TPGS */
+ inqdata->flags = 0;
+
+ /* MULTIP */
+ inqdata->flags2 = 0x10;
+
+ /* WBUS16(5) SYNC(4) LINKED(3) CMDQUE(1) VS(0) */
+ /* CMDQUE */
+ inqdata->flags3 = 0x2;
+
+ /* T10 VENDOR IDENTIFICATION */
+ strncpy((char *)inqdata->t10_vendor_id, "INTEL", 8);
+
+ /* PRODUCT IDENTIFICATION */
+ strncpy((char *)inqdata->product_id, bdev->product_name, 16);
+
+ /* PRODUCT REVISION LEVEL */
+ strncpy((char *)inqdata->product_rev, "0001", 4);
+
+ /* Standard inquiry data ends here. Only populate
+ * remaining fields if alloc_len indicates enough
+ * space to hold it.
+ */
+ len = INQ_OFFSET(product_rev) - 5;
+
+ if (alloc_len >= INQ_OFFSET(vendor)) {
+ /* Vendor specific */
+ memset(inqdata->vendor, 0x20, 20);
+ len += sizeof(inqdata->vendor);
+ }
+
+ if (alloc_len >= INQ_OFFSET(ius)) {
+ /* CLOCKING(3-2) QAS(1) IUS(0) */
+ inqdata->ius = 0;
+ len += sizeof(inqdata->ius);
+ }
+
+ if (alloc_len >= INQ_OFFSET(reserved)) {
+ /* Reserved */
+ inqdata->reserved = 0;
+ len += sizeof(inqdata->reserved);
+ }
+
+ /* VERSION DESCRIPTOR 1-8 */
+ if (alloc_len >= INQ_OFFSET(reserved) + 2) {
+ temp16 = (uint16_t *)&inqdata->desc[0];
+ *temp16 = rte_cpu_to_be_16(0x0960);
+ len += 2;
+ }
+
+ if (alloc_len >= INQ_OFFSET(reserved) + 4) {
+ /* SPC-3 (no version claimed) */
+ temp16 = (uint16_t *)&inqdata->desc[2];
+ *temp16 = rte_cpu_to_be_16(0x0300);
+ len += 2;
+ }
+
+ if (alloc_len >= INQ_OFFSET(reserved) + 6) {
+ /* SBC-2 (no version claimed) */
+ temp16 = (uint16_t *)&inqdata->desc[4];
+ *temp16 = rte_cpu_to_be_16(0x0320);
+ len += 2;
+ }
+
+ if (alloc_len >= INQ_OFFSET(reserved) + 8) {
+ /* SAM-2 (no version claimed) */
+ temp16 = (uint16_t *)&inqdata->desc[6];
+ *temp16 = rte_cpu_to_be_16(0x0040);
+ len += 2;
+ }
+
+ if (alloc_len > INQ_OFFSET(reserved) + 8) {
+ i = alloc_len - (INQ_OFFSET(reserved) + 8);
+ if (i > 30)
+ i = 30;
+ memset(&inqdata->desc[8], 0, i);
+ len += i;
+ }
+
+ /* ADDITIONAL LENGTH */
+ inqdata->add_len = len;
+ }
+
+ /* STATUS GOOD */
+ scsi_task_set_status(task, SCSI_STATUS_GOOD, 0, 0, 0);
+ return hlen + len;
+
+inq_error:
+ scsi_task_set_status(task, SCSI_STATUS_CHECK_CONDITION,
+ SCSI_SENSE_ILLEGAL_REQUEST,
+ SCSI_ASC_INVALID_FIELD_IN_CDB,
+ SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
+ return 0;
+}
+
+static int
+vhost_bdev_scsi_readwrite(struct vhost_block_dev *bdev,
+ struct vhost_scsi_task *task,
+ uint64_t lba, __rte_unused uint32_t xfer_len)
+{
+ uint32_t i;
+ uint64_t offset;
+ uint32_t nbytes = 0;
+
+ offset = lba * bdev->blocklen;
+
+ for (i = 0; i < task->iovs_cnt; i++) {
+ if (task->dxfer_dir == SCSI_DIR_TO_DEV)
+ memcpy(bdev->data + offset, task->iovs[i].iov_base,
+ task->iovs[i].iov_len);
+ else
+ memcpy(task->iovs[i].iov_base, bdev->data + offset,
+ task->iovs[i].iov_len);
+ offset += task->iovs[i].iov_len;
+ nbytes += task->iovs[i].iov_len;
+ }
+
+ return nbytes;
+}
+
+static int
+vhost_bdev_scsi_process_block(struct vhost_block_dev *bdev,
+ struct vhost_scsi_task *task)
+{
+ uint64_t lba, *temp64;
+ uint32_t xfer_len, *temp32;
+ uint16_t *temp16;
+ uint8_t *cdb = (uint8_t *)task->req->cdb;
+
+ switch (cdb[0]) {
+ case SBC_READ_6:
+ case SBC_WRITE_6:
+ lba = (uint64_t)cdb[1] << 16;
+ lba |= (uint64_t)cdb[2] << 8;
+ lba |= (uint64_t)cdb[3];
+ xfer_len = cdb[4];
+ if (xfer_len == 0)
+ xfer_len = 256;
+ return vhost_bdev_scsi_readwrite(bdev, task, lba, xfer_len);
+
+ case SBC_READ_10:
+ case SBC_WRITE_10:
+ temp32 = (uint32_t *)&cdb[2];
+ lba = rte_be_to_cpu_32(*temp32);
+ temp16 = (uint16_t *)&cdb[7];
+ xfer_len = rte_be_to_cpu_16(*temp16);
+ return vhost_bdev_scsi_readwrite(bdev, task, lba, xfer_len);
+
+ case SBC_READ_12:
+ case SBC_WRITE_12:
+ temp32 = (uint32_t *)&cdb[2];
+ lba = rte_be_to_cpu_32(*temp32);
+ temp32 = (uint32_t *)&cdb[6];
+ xfer_len = rte_be_to_cpu_32(*temp32);
+ return vhost_bdev_scsi_readwrite(bdev, task, lba, xfer_len);
+
+ case SBC_READ_16:
+ case SBC_WRITE_16:
+ temp64 = (uint64_t *)&cdb[2];
+ lba = rte_be_to_cpu_64(*temp64);
+ temp32 = (uint32_t *)&cdb[10];
+ xfer_len = rte_be_to_cpu_32(*temp32);
+ return vhost_bdev_scsi_readwrite(bdev, task, lba, xfer_len);
+
+ case SBC_READ_CAPACITY_10: {
+ uint8_t buffer[8];
+
+ if (bdev->blockcnt - 1 > 0xffffffffULL)
+ memset(buffer, 0xff, 4);
+ else {
+ temp32 = (uint32_t *)buffer;
+ *temp32 = rte_cpu_to_be_32(bdev->blockcnt - 1);
+ }
+ temp32 = (uint32_t *)&buffer[4];
+ *temp32 = rte_cpu_to_be_32(bdev->blocklen);
+ memcpy(task->iovs[0].iov_base, buffer, sizeof(buffer));
+ task->resp->status = SCSI_STATUS_GOOD;
+ return sizeof(buffer);
+ }
+
+ case SBC_SYNCHRONIZE_CACHE_10:
+ case SBC_SYNCHRONIZE_CACHE_16:
+ task->resp->status = SCSI_STATUS_GOOD;
+ return 0;
+ }
+
+ scsi_task_set_status(task, SCSI_STATUS_CHECK_CONDITION,
+ SCSI_SENSE_ILLEGAL_REQUEST,
+ SCSI_ASC_INVALID_FIELD_IN_CDB,
+ SCSI_ASCQ_CAUSE_NOT_REPORTABLE);
+ return 0;
+}
+
+int
+vhost_bdev_process_scsi_commands(struct vhost_block_dev *bdev,
+ struct vhost_scsi_task *task)
+{
+ int len;
+ uint8_t *data;
+ uint64_t *temp64, fmt_lun = 0;
+ uint32_t *temp32;
+ const uint8_t *lun;
+ uint8_t *cdb = (uint8_t *)task->req->cdb;
+
+ lun = (const uint8_t *)task->req->lun;
+ /* only 1 LUN supported */
+ if (lun[0] != 1 || lun[1] >= 1)
+ return -1;
+
+ switch (cdb[0]) {
+ case SPC_INQUIRY:
+ len = vhost_bdev_scsi_inquiry_command(bdev, task);
+ task->data_len = len;
+ break;
+ case SPC_REPORT_LUNS:
+ data = (uint8_t *)task->iovs[0].iov_base;
+ fmt_lun |= (0x0ULL & 0x00ffULL) << 48;
+ temp64 = (uint64_t *)&data[8];
+ *temp64 = rte_cpu_to_be_64(fmt_lun);
+ temp32 = (uint32_t *)data;
+ *temp32 = rte_cpu_to_be_32(8);
+ task->data_len = 16;
+ scsi_task_set_status(task, SCSI_STATUS_GOOD, 0, 0, 0);
+ break;
+ case SPC_MODE_SELECT_6:
+ case SPC_MODE_SELECT_10:
+ /* don't support it now */
+ scsi_task_set_status(task, SCSI_STATUS_GOOD, 0, 0, 0);
+ break;
+ case SPC_MODE_SENSE_6:
+ case SPC_MODE_SENSE_10:
+ /* don't support it now */
+ scsi_task_set_status(task, SCSI_STATUS_GOOD, 0, 0, 0);
+ break;
+ case SPC_TEST_UNIT_READY:
+ scsi_task_set_status(task, SCSI_STATUS_GOOD, 0, 0, 0);
+ break;
+ default:
+ len = vhost_bdev_scsi_process_block(bdev, task);
+ task->data_len = len;
+ }
+
+ return 0;
+}
diff --git a/examples/vhost_scsi/scsi_spec.h b/examples/vhost_scsi/scsi_spec.h
new file mode 100644
index 0000000..60d761c
--- /dev/null
+++ b/examples/vhost_scsi/scsi_spec.h
@@ -0,0 +1,493 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) Intel Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * SCSI specification definition
+ * refer http://www.t10.org/drafts.htm#SPC_Family for SPC-3 and SBC-3
+ */
+
+#ifndef _SCSI_SPEC_H
+#define _SCSI_SPEC_H
+
+#include <stdint.h>
+
+enum scsi_group_code {
+ SCSI_6BYTE_CMD = 0x00,
+ SCSI_10BYTE_CMD = 0x20,
+ SCSI_10BYTE_CMD2 = 0x40,
+ SCSI_16BYTE_CMD = 0x80,
+ SCSI_12BYTE_CMD = 0xa0,
+};
+
+#define SCSI_GROUP_MASK 0xe0
+#define SCSI_OPCODE_MASK 0x1f
+
+enum scsi_status {
+ SCSI_STATUS_GOOD = 0x00,
+ SCSI_STATUS_CHECK_CONDITION = 0x02,
+ SCSI_STATUS_CONDITION_MET = 0x04,
+ SCSI_STATUS_BUSY = 0x08,
+ SCSI_STATUS_INTERMEDIATE = 0x10,
+ SCSI_STATUS_INTERMEDIATE_CONDITION_MET = 0x14,
+ SCSI_STATUS_RESERVATION_CONFLICT = 0x18,
+ SCSI_STATUS_Obsolete = 0x22,
+ SCSI_STATUS_TASK_SET_FULL = 0x28,
+ SCSI_STATUS_ACA_ACTIVE = 0x30,
+ SCSI_STATUS_TASK_ABORTED = 0x40,
+};
+
+enum scsi_sense {
+ SCSI_SENSE_NO_SENSE = 0x00,
+ SCSI_SENSE_RECOVERED_ERROR = 0x01,
+ SCSI_SENSE_NOT_READY = 0x02,
+ SCSI_SENSE_MEDIUM_ERROR = 0x03,
+ SCSI_SENSE_HARDWARE_ERROR = 0x04,
+ SCSI_SENSE_ILLEGAL_REQUEST = 0x05,
+ SCSI_SENSE_UNIT_ATTENTION = 0x06,
+ SCSI_SENSE_DATA_PROTECT = 0x07,
+ SCSI_SENSE_BLANK_CHECK = 0x08,
+ SCSI_SENSE_VENDOR_SPECIFIC = 0x09,
+ SCSI_SENSE_COPY_ABORTED = 0x0a,
+ SCSI_SENSE_ABORTED_COMMAND = 0x0b,
+ SCSI_SENSE_VOLUME_OVERFLOW = 0x0d,
+ SCSI_SENSE_MISCOMPARE = 0x0e,
+};
+
+enum scsi_asc {
+ SCSI_ASC_NO_ADDITIONAL_SENSE = 0x00,
+ SCSI_ASC_PERIPHERAL_DEVICE_WRITE_FAULT = 0x03,
+ SCSI_ASC_LOGICAL_UNIT_NOT_READY = 0x04,
+ SCSI_ASC_WARNING = 0x0b,
+ SCSI_ASC_LOGICAL_BLOCK_GUARD_CHECK_FAILED = 0x10,
+ SCSI_ASC_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = 0x10,
+ SCSI_ASC_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = 0x10,
+ SCSI_ASC_UNRECOVERED_READ_ERROR = 0x11,
+ SCSI_ASC_MISCOMPARE_DURING_VERIFY_OPERATION = 0x1d,
+ SCSI_ASC_INVALID_COMMAND_OPERATION_CODE = 0x20,
+ SCSI_ASC_ACCESS_DENIED = 0x20,
+ SCSI_ASC_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE = 0x21,
+ SCSI_ASC_INVALID_FIELD_IN_CDB = 0x24,
+ SCSI_ASC_LOGICAL_UNIT_NOT_SUPPORTED = 0x25,
+ SCSI_ASC_WRITE_PROTECTED = 0x27,
+ SCSI_ASC_FORMAT_COMMAND_FAILED = 0x31,
+ SCSI_ASC_INTERNAL_TARGET_FAILURE = 0x44,
+};
+
+enum scsi_ascq {
+ SCSI_ASCQ_CAUSE_NOT_REPORTABLE = 0x00,
+ SCSI_ASCQ_BECOMING_READY = 0x01,
+ SCSI_ASCQ_FORMAT_COMMAND_FAILED = 0x01,
+ SCSI_ASCQ_LOGICAL_BLOCK_GUARD_CHECK_FAILED = 0x01,
+ SCSI_ASCQ_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = 0x02,
+ SCSI_ASCQ_NO_ACCESS_RIGHTS = 0x02,
+ SCSI_ASCQ_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = 0x03,
+ SCSI_ASCQ_POWER_LOSS_EXPECTED = 0x08,
+ SCSI_ASCQ_INVALID_LU_IDENTIFIER = 0x09,
+};
+
+enum spc_opcode {
+ /* SPC3 related */
+ SPC_ACCESS_CONTROL_IN = 0x86,
+ SPC_ACCESS_CONTROL_OUT = 0x87,
+ SPC_EXTENDED_COPY = 0x83,
+ SPC_INQUIRY = 0x12,
+ SPC_LOG_SELECT = 0x4c,
+ SPC_LOG_SENSE = 0x4d,
+ SPC_MODE_SELECT_6 = 0x15,
+ SPC_MODE_SELECT_10 = 0x55,
+ SPC_MODE_SENSE_6 = 0x1a,
+ SPC_MODE_SENSE_10 = 0x5a,
+ SPC_PERSISTENT_RESERVE_IN = 0x5e,
+ SPC_PERSISTENT_RESERVE_OUT = 0x5f,
+ SPC_PREVENT_ALLOW_MEDIUM_REMOVAL = 0x1e,
+ SPC_READ_ATTRIBUTE = 0x8c,
+ SPC_READ_BUFFER = 0x3c,
+ SPC_RECEIVE_COPY_RESULTS = 0x84,
+ SPC_RECEIVE_DIAGNOSTIC_RESULTS = 0x1c,
+ SPC_REPORT_LUNS = 0xa0,
+ SPC_REQUEST_SENSE = 0x03,
+ SPC_SEND_DIAGNOSTIC = 0x1d,
+ SPC_TEST_UNIT_READY = 0x00,
+ SPC_WRITE_ATTRIBUTE = 0x8d,
+ SPC_WRITE_BUFFER = 0x3b,
+
+ SPC_SERVICE_ACTION_IN_12 = 0xab,
+ SPC_SERVICE_ACTION_OUT_12 = 0xa9,
+ SPC_SERVICE_ACTION_IN_16 = 0x9e,
+ SPC_SERVICE_ACTION_OUT_16 = 0x9f,
+
+ SPC_VARIABLE_LENGTH = 0x7f,
+
+ SPC_MO_CHANGE_ALIASES = 0x0b,
+ SPC_MO_SET_DEVICE_IDENTIFIER = 0x06,
+ SPC_MO_SET_PRIORITY = 0x0e,
+ SPC_MO_SET_TARGET_PORT_GROUPS = 0x0a,
+ SPC_MO_SET_TIMESTAMP = 0x0f,
+ SPC_MI_REPORT_ALIASES = 0x0b,
+ SPC_MI_REPORT_DEVICE_IDENTIFIER = 0x05,
+ SPC_MI_REPORT_PRIORITY = 0x0e,
+ SPC_MI_REPORT_SUPPORTED_OPERATION_CODES = 0x0c,
+ SPC_MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS = 0x0d,
+ SPC_MI_REPORT_TARGET_PORT_GROUPS = 0x0a,
+ SPC_MI_REPORT_TIMESTAMP = 0x0f,
+
+ /* SPC2 related (Obsolete) */
+ SPC2_RELEASE_6 = 0x17,
+ SPC2_RELEASE_10 = 0x57,
+ SPC2_RESERVE_6 = 0x16,
+ SPC2_RESERVE_10 = 0x56,
+};
+
+enum scc_opcode {
+ SCC_MAINTENANCE_IN = 0xa3,
+ SCC_MAINTENANCE_OUT = 0xa4,
+};
+
+enum sbc_opcode {
+ SBC_COMPARE_AND_WRITE = 0x89,
+ SBC_FORMAT_UNIT = 0x04,
+ SBC_GET_LBA_STATUS = 0x0012009e,
+ SBC_ORWRITE_16 = 0x8b,
+ SBC_PRE_FETCH_10 = 0x34,
+ SBC_PRE_FETCH_16 = 0x90,
+ SBC_READ_6 = 0x08,
+ SBC_READ_10 = 0x28,
+ SBC_READ_12 = 0xa8,
+ SBC_READ_16 = 0x88,
+ SBC_READ_ATTRIBUTE = 0x8c,
+ SBC_READ_BUFFER = 0x3c,
+ SBC_READ_CAPACITY_10 = 0x25,
+ SBC_READ_DEFECT_DATA_10 = 0x37,
+ SBC_READ_DEFECT_DATA_12 = 0xb7,
+ SBC_READ_LONG_10 = 0x3e,
+ SBC_REASSIGN_BLOCKS = 0x07,
+ SBC_SANITIZE = 0x48,
+ SBC_START_STOP_UNIT = 0x1b,
+ SBC_SYNCHRONIZE_CACHE_10 = 0x35,
+ SBC_SYNCHRONIZE_CACHE_16 = 0x91,
+ SBC_UNMAP = 0x42,
+ SBC_VERIFY_10 = 0x2f,
+ SBC_VERIFY_12 = 0xaf,
+ SBC_VERIFY_16 = 0x8f,
+ SBC_WRITE_6 = 0x0a,
+ SBC_WRITE_10 = 0x2a,
+ SBC_WRITE_12 = 0xaa,
+ SBC_WRITE_16 = 0x8a,
+ SBC_WRITE_AND_VERIFY_10 = 0x2e,
+ SBC_WRITE_AND_VERIFY_12 = 0xae,
+ SBC_WRITE_AND_VERIFY_16 = 0x8e,
+ SBC_WRITE_LONG_10 = 0x3f,
+ SBC_WRITE_SAME_10 = 0x41,
+ SBC_WRITE_SAME_16 = 0x93,
+ SBC_XDREAD_10 = 0x52,
+ SBC_XDWRITE_10 = 0x50,
+ SBC_XDWRITEREAD_10 = 0x53,
+ SBC_XPWRITE_10 = 0x51,
+
+ SBC_SAI_READ_CAPACITY_16 = 0x10,
+ SBC_SAI_READ_LONG_16 = 0x11,
+ SBC_SAO_WRITE_LONG_16 = 0x11,
+
+ SBC_VL_READ_32 = 0x0009,
+ SBC_VL_VERIFY_32 = 0x000a,
+ SBC_VL_WRITE_32 = 0x000b,
+ SBC_VL_WRITE_AND_VERIFY_32 = 0x000c,
+ SBC_VL_WRITE_SAME_32 = 0x000d,
+ SBC_VL_XDREAD_32 = 0x0003,
+ SBC_VL_XDWRITE_32 = 0x0004,
+ SBC_VL_XDWRITEREAD_32 = 0x0007,
+ SBC_VL_XPWRITE_32 = 0x0006,
+};
+
+enum mmc_opcode {
+ /* MMC6 */
+ MMC_READ_DISC_STRUCTURE = 0xad,
+
+ /* MMC4 */
+ MMC_BLANK = 0xa1,
+ MMC_CLOSE_TRACK_SESSION = 0x5b,
+ MMC_ERASE_10 = 0x2c,
+ MMC_FORMAT_UNIT = 0x04,
+ MMC_GET_CONFIGURATION = 0x46,
+ MMC_GET_EVENT_STATUS_NOTIFICATION = 0x4a,
+ MMC_GET_PERFORMANCE = 0xac,
+ MMC_INQUIRY = 0x12,
+ MMC_LOAD_UNLOAD_MEDIUM = 0xa6,
+ MMC_MECHANISM_STATUS = 0xbd,
+ MMC_MODE_SELECT_10 = 0x55,
+ MMC_MODE_SENSE_10 = 0x5a,
+ MMC_PAUSE_RESUME = 0x4b,
+ MMC_PLAY_AUDIO_10 = 0x45,
+ MMC_PLAY_AUDIO_12 = 0xa5,
+ MMC_PLAY_AUDIO_MSF = 0x47,
+ MMC_PREVENT_ALLOW_MEDIUM_REMOVAL = 0x1e,
+ MMC_READ_10 = 0x28,
+ MMC_READ_12 = 0xa8,
+ MMC_READ_BUFFER = 0x3c,
+ MMC_READ_BUFFER_CAPACITY = 0x5c,
+ MMC_READ_CAPACITY = 0x25,
+ MMC_READ_CD = 0xbe,
+ MMC_READ_CD_MSF = 0xb9,
+ MMC_READ_DISC_INFORMATION = 0x51,
+ MMC_READ_DVD_STRUCTURE = 0xad,
+ MMC_READ_FORMAT_CAPACITIES = 0x23,
+ MMC_READ_SUB_CHANNEL = 0x42,
+ MMC_READ_TOC_PMA_ATIP = 0x43,
+ MMC_READ_TRACK_INFORMATION = 0x52,
+ MMC_REPAIR_TRACK = 0x58,
+ MMC_REPORT_KEY = 0xa4,
+ MMC_REQUEST_SENSE = 0x03,
+ MMC_RESERVE_TRACK = 0x53,
+ MMC_SCAN = 0xba,
+ MMC_SEEK_10 = 0x2b,
+ MMC_SEND_CUE_SHEET = 0x5d,
+ MMC_SEND_DVD_STRUCTURE = 0xbf,
+ MMC_SEND_KEY = 0xa3,
+ MMC_SEND_OPC_INFORMATION = 0x54,
+ MMC_SET_CD_SPEED = 0xbb,
+ MMC_SET_READ_AHEAD = 0xa7,
+ MMC_SET_STREAMING = 0xb6,
+ MMC_START_STOP_UNIT = 0x1b,
+ MMC_STOP_PLAY_SCAN = 0x4e,
+ MMC_SYNCHRONIZE_CACHE = 0x35,
+ MMC_TEST_UNIT_READY = 0x00,
+ MMC_VERIFY_10 = 0x2f,
+ MMC_WRITE_10 = 0xa2,
+ MMC_WRITE_12 = 0xaa,
+ MMC_WRITE_AND_VERIFY_10 = 0x2e,
+ MMC_WRITE_BUFFER = 0x3b,
+};
+
+enum ssc_opcode {
+ SSC_ERASE_6 = 0x19,
+ SSC_FORMAT_MEDIUM = 0x04,
+ SSC_LOAD_UNLOAD = 0x1b,
+ SSC_LOCATE_10 = 0x2b,
+ SSC_LOCATE_16 = 0x92,
+ SSC_MOVE_MEDIUM_ATTACHED = 0xa7,
+ SSC_READ_6 = 0x08,
+ SSC_READ_BLOCK_LIMITS = 0x05,
+ SSC_READ_ELEMENT_STATUS_ATTACHED = 0xb4,
+ SSC_READ_POSITION = 0x34,
+ SSC_READ_REVERSE_6 = 0x0f,
+ SSC_RECOVER_BUFFERED_DATA = 0x14,
+ SSC_REPORT_DENSITY_SUPPORT = 0x44,
+ SSC_REWIND = 0x01,
+ SSC_SET_CAPACITY = 0x0b,
+ SSC_SPACE_6 = 0x11,
+ SSC_SPACE_16 = 0x91,
+ SSC_VERIFY_6 = 0x13,
+ SSC_WRITE_6 = 0x0a,
+ SSC_WRITE_FILEMARKS_6 = 0x10,
+};
+
+enum spc_vpd {
+ SPC_VPD_DEVICE_IDENTIFICATION = 0x83,
+ SPC_VPD_EXTENDED_INQUIRY_DATA = 0x86,
+ SPC_VPD_MANAGEMENT_NETWORK_ADDRESSES = 0x85,
+ SPC_VPD_MODE_PAGE_POLICY = 0x87,
+ SPC_VPD_SCSI_PORTS = 0x88,
+ SPC_VPD_SOFTWARE_INTERFACE_IDENTIFICATION = 0x84,
+ SPC_VPD_SUPPORTED_VPD_PAGES = 0x00,
+ SPC_VPD_UNIT_SERIAL_NUMBER = 0x80,
+ SPC_VPD_BLOCK_LIMITS = 0xb0,
+ SPC_VPD_BLOCK_DEV_CHARS = 0xb1,
+ SPC_VPD_BLOCK_THIN_PROVISION = 0xb2,
+};
+
+enum {
+ SPC_PERIPHERAL_DEVICE_TYPE_DISK = 0x00,
+ SPC_PERIPHERAL_DEVICE_TYPE_TAPE = 0x01,
+ SPC_PERIPHERAL_DEVICE_TYPE_DVD = 0x05,
+ SPC_PERIPHERAL_DEVICE_TYPE_CHANGER = 0x08,
+
+ SPC_VERSION_NONE = 0x00,
+ SPC_VERSION_SPC = 0x03,
+ SPC_VERSION_SPC2 = 0x04,
+ SPC_VERSION_SPC3 = 0x05,
+ SPC_VERSION_SPC4 = 0x06,
+
+ SPC_PROTOCOL_IDENTIFIER_FC = 0x00,
+ SPC_PROTOCOL_IDENTIFIER_PSCSI = 0x01,
+ SPC_PROTOCOL_IDENTIFIER_SSA = 0x02,
+ SPC_PROTOCOL_IDENTIFIER_IEEE1394 = 0x03,
+ SPC_PROTOCOL_IDENTIFIER_RDMA = 0x04,
+ SPC_PROTOCOL_IDENTIFIER_ISCSI = 0x05,
+ SPC_PROTOCOL_IDENTIFIER_SAS = 0x06,
+ SPC_PROTOCOL_IDENTIFIER_ADT = 0x07,
+ SPC_PROTOCOL_IDENTIFIER_ATA = 0x08,
+
+ SPC_VPD_CODE_SET_BINARY = 0x01,
+ SPC_VPD_CODE_SET_ASCII = 0x02,
+ SPC_VPD_CODE_SET_UTF8 = 0x03,
+
+ SPC_VPD_ASSOCIATION_LOGICAL_UNIT = 0x00,
+ SPC_VPD_ASSOCIATION_TARGET_PORT = 0x01,
+ SPC_VPD_ASSOCIATION_TARGET_DEVICE = 0x02,
+
+ SPC_VPD_IDENTIFIER_TYPE_VENDOR_SPECIFIC = 0x00,
+ SPC_VPD_IDENTIFIER_TYPE_T10_VENDOR_ID = 0x01,
+ SPC_VPD_IDENTIFIER_TYPE_EUI64 = 0x02,
+ SPC_VPD_IDENTIFIER_TYPE_NAA = 0x03,
+ SPC_VPD_IDENTIFIER_TYPE_RELATIVE_TARGET_PORT = 0x04,
+ SPC_VPD_IDENTIFIER_TYPE_TARGET_PORT_GROUP = 0x05,
+ SPC_VPD_IDENTIFIER_TYPE_LOGICAL_UNIT_GROUP = 0x06,
+ SPC_VPD_IDENTIFIER_TYPE_MD5_LOGICAL_UNIT = 0x07,
+ SPC_VPD_IDENTIFIER_TYPE_SCSI_NAME = 0x08,
+};
+
+struct scsi_cdb_inquiry {
+ uint8_t opcode;
+ uint8_t evpd;
+ uint8_t page_code;
+ uint16_t alloc_len;
+ uint8_t control;
+};
+
+struct scsi_cdb_inquiry_data {
+ uint8_t peripheral;
+ uint8_t rmb;
+ uint8_t version;
+ uint8_t response;
+ uint8_t add_len;
+ uint8_t flags;
+ uint8_t flags2;
+ uint8_t flags3;
+ uint8_t t10_vendor_id[8];
+ uint8_t product_id[16];
+ uint8_t product_rev[4];
+ uint8_t vendor[20];
+ uint8_t ius;
+ uint8_t reserved;
+ uint8_t desc[];
+};
+
+struct scsi_vpd_page {
+ uint8_t peripheral;
+ uint8_t page_code;
+ uint16_t alloc_len;
+ uint8_t params[];
+};
+
+#define SCSI_VEXT_REF_CHK 0x01
+#define SCSI_VEXT_APP_CHK 0x02
+#define SCSI_VEXT_GRD_CHK 0x04
+#define SCSI_VEXT_SIMPSUP 0x01
+#define SCSI_VEXT_ORDSUP 0x02
+#define SCSI_VEXT_HEADSUP 0x04
+#define SCSI_VEXT_PRIOR_SUP 0x08
+#define SCSI_VEXT_GROUP_SUP 0x10
+#define SCSI_VEXT_UASK_SUP 0x20
+#define SCSI_VEXT_V_SUP 0x01
+#define SCSI_VEXT_NV_SUP 0x02
+#define SCSI_VEXT_CRD_SUP 0x04
+#define SCSI_VEXT_WU_SUP 0x08
+
+struct scsi_vpd_ext_inquiry {
+ uint8_t peripheral;
+ uint8_t page_code;
+ uint16_t alloc_len;
+ uint8_t check;
+ uint8_t sup;
+ uint8_t sup2;
+ uint8_t luiclr;
+ uint8_t cbcs;
+ uint8_t micro_dl;
+ uint8_t reserved[54];
+};
+
+#define SPC_VPD_DESIG_PIV 0x80
+
+/* designation descriptor */
+struct scsi_desig_desc {
+ uint8_t code_set : 4;
+ uint8_t protocol_id : 4;
+ uint8_t type : 4;
+ uint8_t association : 2;
+ uint8_t reserved0 : 1;
+ uint8_t piv : 1;
+ uint8_t reserved1;
+ uint8_t len;
+ uint8_t desig[];
+};
+
+/* mode page policy descriptor */
+struct scsi_mpage_policy_desc {
+ uint8_t page_code;
+ uint8_t sub_page_code;
+ uint8_t policy;
+ uint8_t reserved;
+};
+
+/* target port descriptor */
+struct scsi_tgt_port_desc {
+ uint8_t code_set;
+ uint8_t desig_type;
+ uint8_t reserved;
+ uint8_t len;
+ uint8_t designator[];
+};
+
+/* SCSI port designation descriptor */
+struct scsi_port_desc {
+ uint16_t reserved;
+ uint16_t rel_port_id;
+ uint16_t reserved2;
+ uint16_t init_port_len;
+ uint16_t init_port_id;
+ uint16_t reserved3;
+ uint16_t tgt_desc_len;
+ uint8_t tgt_desc[];
+};
+
+/* SCSI UNMAP block descriptor */
+struct scsi_unmap_bdesc {
+ /* UNMAP LOGICAL BLOCK ADDRESS */
+ uint64_t lba;
+
+ /* NUMBER OF LOGICAL BLOCKS */
+ uint32_t block_count;
+
+ /* RESERVED */
+ uint32_t reserved;
+};
+
+#define SCSI_UNMAP_LBPU (1 << 7)
+#define SCSI_UNMAP_LBPWS (1 << 6)
+#define SCSI_UNMAP_LBPWS10 (1 << 5)
+
+#define SCSI_UNMAP_FULL_PROVISIONING 0x00
+#define SCSI_UNMAP_RESOURCE_PROVISIONING 0x01
+#define SCSI_UNMAP_THIN_PROVISIONING 0x02
+
+#endif /* _SCSI_SPEC_H */
diff --git a/examples/vhost_scsi/vhost_scsi.c b/examples/vhost_scsi/vhost_scsi.c
new file mode 100644
index 0000000..b4f1f8d
--- /dev/null
+++ b/examples/vhost_scsi/vhost_scsi.c
@@ -0,0 +1,474 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <signal.h>
+#include <assert.h>
+#include <semaphore.h>
+#include <linux/virtio_scsi.h>
+#include <linux/virtio_ring.h>
+
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_vhost.h>
+
+#include "vhost_scsi.h"
+#include "scsi_spec.h"
+
+#define VIRTIO_SCSI_FEATURES ((1 << VIRTIO_F_NOTIFY_ON_EMPTY) |\
+ (1 << VIRTIO_RING_F_EVENT_IDX) |\
+ (1 << VIRTIO_SCSI_F_INOUT) |\
+ (1 << VIRTIO_SCSI_F_CHANGE))
+
+/* Path to folder where character device will be created. Can be set by user. */
+static char dev_pathname[PATH_MAX] = "";
+
+static struct vhost_scsi_ctrlr *g_vhost_ctrlr;
+static int g_should_stop;
+static sem_t exit_sem;
+
+static struct vhost_scsi_ctrlr *
+vhost_scsi_ctrlr_find(__rte_unused const char *ctrlr_name)
+{
+ /* currently we only support 1 socket file fd */
+ return g_vhost_ctrlr;
+}
+
+static uint64_t gpa_to_vva(int vid, uint64_t gpa)
+{
+ char path[PATH_MAX];
+ struct vhost_scsi_ctrlr *ctrlr;
+ int ret = 0;
+
+ ret = rte_vhost_get_ifname(vid, path, PATH_MAX);
+ if (ret) {
+ fprintf(stderr, "Cannot get socket name\n");
+ assert(ret != 0);
+ }
+
+ ctrlr = vhost_scsi_ctrlr_find(path);
+ if (!ctrlr) {
+ fprintf(stderr, "Controller is not ready\n");
+ assert(ctrlr != NULL);
+ }
+
+ assert(ctrlr->mem != NULL);
+
+ return rte_vhost_gpa_to_vva(ctrlr->mem, gpa);
+}
+
+static struct vring_desc *
+descriptor_get_next(struct vring_desc *vq_desc, struct vring_desc *cur_desc)
+{
+ return &vq_desc[cur_desc->next];
+}
+
+static bool
+descriptor_has_next(struct vring_desc *cur_desc)
+{
+ return !!(cur_desc->flags & VRING_DESC_F_NEXT);
+}
+
+static bool
+descriptor_is_wr(struct vring_desc *cur_desc)
+{
+ return !!(cur_desc->flags & VRING_DESC_F_WRITE);
+}
+
+static void
+submit_completion(struct vhost_scsi_task *task)
+{
+ struct rte_vhost_vring *vq;
+ struct vring_used *used;
+
+ vq = task->vq;
+ used = vq->used;
+ /* Fill out the next entry in the "used" ring. id = the
+ * index of the descriptor that contained the SCSI request.
+ * len = the total amount of data transferred for the SCSI
+ * request. We must report the correct len, for variable
+ * length SCSI CDBs, where we may return less data than
+ * allocated by the guest VM.
+ */
+ used->ring[used->idx & (vq->size - 1)].id = task->req_idx;
+ used->ring[used->idx & (vq->size - 1)].len = task->data_len;
+ used->idx++;
+
+ /* Send an interrupt back to the guest VM so that it knows
+ * a completion is ready to be processed.
+ */
+ eventfd_write(vq->callfd, (eventfd_t)1);
+}
+
+static void
+vhost_process_read_payload_chain(struct vhost_scsi_task *task)
+{
+ void *data;
+
+ task->iovs_cnt = 0;
+ task->resp = (void *)(uintptr_t)gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+
+ while (descriptor_has_next(task->desc)) {
+ task->desc = descriptor_get_next(task->vq->desc, task->desc);
+ data = (void *)(uintptr_t)gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+ task->iovs[task->iovs_cnt].iov_base = data;
+ task->iovs[task->iovs_cnt].iov_len = task->desc->len;
+ task->data_len += task->desc->len;
+ task->iovs_cnt++;
+ }
+}
+
+static void
+vhost_process_write_payload_chain(struct vhost_scsi_task *task)
+{
+ void *data;
+
+ task->iovs_cnt = 0;
+
+ do {
+ data = (void *)(uintptr_t)gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+ task->iovs[task->iovs_cnt].iov_base = data;
+ task->iovs[task->iovs_cnt].iov_len = task->desc->len;
+ task->data_len += task->desc->len;
+ task->iovs_cnt++;
+ task->desc = descriptor_get_next(task->vq->desc, task->desc);
+ } while (descriptor_has_next(task->desc));
+
+ task->resp = (void *)(uintptr_t)gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+}
+
+static struct vhost_block_dev *
+vhost_scsi_bdev_construct(const char *bdev_name, const char *bdev_serial,
+ uint32_t blk_size, uint64_t blk_cnt,
+ bool wce_enable)
+{
+ struct vhost_block_dev *bdev;
+
+ bdev = rte_zmalloc(NULL, sizeof(*bdev), RTE_CACHE_LINE_SIZE);
+ if (!bdev)
+ return NULL;
+
+ strncpy(bdev->name, bdev_name, sizeof(bdev->name));
+ strncpy(bdev->product_name, bdev_serial, sizeof(bdev->product_name));
+ bdev->blocklen = blk_size;
+ bdev->blockcnt = blk_cnt;
+ bdev->write_cache = wce_enable;
+
+ /* use memory as disk storage space */
+ bdev->data = rte_zmalloc(NULL, blk_cnt * blk_size, 0);
+ if (!bdev->data) {
+ fprintf(stderr, "no enough reseverd huge memory for disk\n");
+ return NULL;
+ }
+
+ return bdev;
+}
+
+static void
+process_requestq(struct vhost_scsi_ctrlr *ctrlr, uint32_t q_idx)
+{
+ int ret;
+ struct vhost_scsi_queue *scsi_vq;
+ struct rte_vhost_vring *vq;
+
+ scsi_vq = &ctrlr->bdev->queues[q_idx];
+ vq = &scsi_vq->vq;
+ ret = rte_vhost_get_vhost_vring(ctrlr->bdev->vid, q_idx, vq);
+ assert(ret == 0);
+
+ while (vq->avail->idx != scsi_vq->last_used_idx) {
+ int req_idx;
+ uint16_t last_idx;
+ struct vhost_scsi_task *task;
+
+ last_idx = scsi_vq->last_used_idx & (vq->size - 1);
+ req_idx = vq->avail->ring[last_idx];
+
+ task = rte_zmalloc(NULL, sizeof(*task), 0);
+ assert(task != NULL);
+
+ task->ctrlr = ctrlr;
+ task->bdev = ctrlr->bdev;
+ task->vq = vq;
+ task->req_idx = req_idx;
+ task->desc = &task->vq->desc[task->req_idx];
+
+ /* does not support indirect descriptors */
+ assert((task->desc->flags & VRING_DESC_F_INDIRECT) == 0);
+ scsi_vq->last_used_idx++;
+
+ task->req = (void *)(uintptr_t)gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+
+ task->desc = descriptor_get_next(task->vq->desc, task->desc);
+ if (!descriptor_has_next(task->desc)) {
+ task->dxfer_dir = SCSI_DIR_NONE;
+ task->resp = (void *)(uintptr_t)
+ gpa_to_vva(task->bdev->vid,
+ task->desc->addr);
+
+ } else if (!descriptor_is_wr(task->desc)) {
+ task->dxfer_dir = SCSI_DIR_TO_DEV;
+ vhost_process_write_payload_chain(task);
+ } else {
+ task->dxfer_dir = SCSI_DIR_FROM_DEV;
+ vhost_process_read_payload_chain(task);
+ }
+
+ ret = vhost_bdev_process_scsi_commands(ctrlr->bdev, task);
+ if (ret) {
+ /* invalid response */
+ task->resp->response = VIRTIO_SCSI_S_BAD_TARGET;
+ } else {
+ /* successfully */
+ task->resp->response = VIRTIO_SCSI_S_OK;
+ task->resp->status = 0;
+ task->resp->resid = 0;
+ }
+ submit_completion(task);
+ rte_free(task);
+ }
+}
+
+/* Main framework for processing IOs */
+static void *
+ctrlr_worker(void *arg)
+{
+ uint32_t idx, num;
+ struct vhost_scsi_ctrlr *ctrlr = (struct vhost_scsi_ctrlr *)arg;
+ cpu_set_t cpuset;
+ pthread_t thread;
+
+ thread = pthread_self();
+ CPU_ZERO(&cpuset);
+ CPU_SET(0, &cpuset);
+ pthread_setaffinity_np(thread, sizeof(cpu_set_t), &cpuset);
+
+ num = rte_vhost_get_vring_num(ctrlr->bdev->vid);
+ fprintf(stdout, "Ctrlr Worker Thread Started with %u Vring\n", num);
+
+ if (num != NUM_OF_SCSI_QUEUES) {
+ fprintf(stderr, "Only 1 IO queue are supported\n");
+ exit(0);
+ }
+
+ while (!g_should_stop && ctrlr->bdev != NULL) {
+ /* At least 3 vrings, currently only can support 1 IO queue
+ * Queue 2 for IO queue, does not support TMF and hotplug
+ * for the example application now
+ */
+ for (idx = 2; idx < num; idx++)
+ process_requestq(ctrlr, idx);
+ }
+
+ fprintf(stdout, "Ctrlr Worker Thread Exiting\n");
+ sem_post(&exit_sem);
+ return NULL;
+}
+
+static int
+new_device(int vid)
+{
+ char path[PATH_MAX];
+ struct vhost_scsi_ctrlr *ctrlr;
+ struct vhost_scsi_queue *scsi_vq;
+ struct rte_vhost_vring *vq;
+ pthread_t tid;
+ int i, ret;
+
+ ret = rte_vhost_get_ifname(vid, path, PATH_MAX);
+ if (ret) {
+ fprintf(stderr, "Cannot get socket name\n");
+ return -1;
+ }
+
+ ctrlr = vhost_scsi_ctrlr_find(path);
+ if (!ctrlr) {
+ fprintf(stderr, "Controller is not ready\n");
+ return -1;
+ }
+
+ ret = rte_vhost_get_mem_table(vid, &ctrlr->mem);
+ if (ret) {
+ fprintf(stderr, "Get Controller memory region failed\n");
+ return -1;
+ }
+ assert(ctrlr->mem != NULL);
+
+ /* hardcoded block device information with 128MiB */
+ ctrlr->bdev = vhost_scsi_bdev_construct("malloc0", "vhost_scsi_malloc0",
+ 4096, 32768, 0);
+ if (!ctrlr->bdev)
+ return -1;
+
+ ctrlr->bdev->vid = vid;
+
+ /* Disable Notifications */
+ for (i = 0; i < NUM_OF_SCSI_QUEUES; i++) {
+ rte_vhost_enable_guest_notification(vid, i, 0);
+ /* restore used index */
+ scsi_vq = &ctrlr->bdev->queues[i];
+ vq = &scsi_vq->vq;
+ ret = rte_vhost_get_vhost_vring(ctrlr->bdev->vid, i, vq);
+ assert(ret == 0);
+ scsi_vq->last_used_idx = vq->used->idx;
+ scsi_vq->last_avail_idx = vq->used->idx;
+ }
+
+ g_should_stop = 0;
+ fprintf(stdout, "New Device %s, Device ID %d\n", path, vid);
+ if (pthread_create(&tid, NULL, &ctrlr_worker, ctrlr) < 0) {
+ fprintf(stderr, "Worker Thread Started Failed\n");
+ return -1;
+ }
+ pthread_detach(tid);
+ return 0;
+}
+
+static void
+destroy_device(int vid)
+{
+ char path[PATH_MAX];
+ struct vhost_scsi_ctrlr *ctrlr;
+
+ rte_vhost_get_ifname(vid, path, PATH_MAX);
+ fprintf(stdout, "Destroy %s Device ID %d\n", path, vid);
+ ctrlr = vhost_scsi_ctrlr_find(path);
+ if (!ctrlr) {
+ fprintf(stderr, "Destroy Ctrlr Failed\n");
+ return;
+ }
+ ctrlr->bdev = NULL;
+ g_should_stop = 1;
+
+ sem_wait(&exit_sem);
+}
+
+static const struct vhost_device_ops vhost_scsi_device_ops = {
+ .new_device = new_device,
+ .destroy_device = destroy_device,
+};
+
+static struct vhost_scsi_ctrlr *
+vhost_scsi_ctrlr_construct(const char *ctrlr_name)
+{
+ int ret;
+ struct vhost_scsi_ctrlr *ctrlr;
+ char *path;
+ char cwd[PATH_MAX];
+
+ /* always use current directory */
+ path = getcwd(cwd, PATH_MAX);
+ if (!path) {
+ fprintf(stderr, "Cannot get current working directory\n");
+ return NULL;
+ }
+ snprintf(dev_pathname, sizeof(dev_pathname), "%s/%s", path, ctrlr_name);
+
+ if (access(dev_pathname, F_OK) != -1) {
+ if (unlink(dev_pathname) != 0)
+ rte_exit(EXIT_FAILURE, "Cannot remove %s.\n",
+ dev_pathname);
+ }
+
+ if (rte_vhost_driver_register(dev_pathname, 0) != 0) {
+ fprintf(stderr, "socket %s already exists\n", dev_pathname);
+ return NULL;
+ }
+
+ fprintf(stdout, "socket file: %s created\n", dev_pathname);
+
+ ret = rte_vhost_driver_set_features(dev_pathname, VIRTIO_SCSI_FEATURES);
+ if (ret != 0) {
+ fprintf(stderr, "Set vhost driver features failed\n");
+ return NULL;
+ }
+
+ ctrlr = rte_zmalloc(NULL, sizeof(*ctrlr), RTE_CACHE_LINE_SIZE);
+ if (!ctrlr)
+ return NULL;
+
+ rte_vhost_driver_callback_register(dev_pathname,
+ &vhost_scsi_device_ops);
+
+ return ctrlr;
+}
+
+static void
+signal_handler(__rte_unused int signum)
+{
+
+ if (access(dev_pathname, F_OK) == 0)
+ unlink(dev_pathname);
+ exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+ int ret;
+
+ signal(SIGINT, signal_handler);
+
+ /* init EAL */
+ ret = rte_eal_init(argc, argv);
+ if (ret < 0)
+ rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+
+ g_vhost_ctrlr = vhost_scsi_ctrlr_construct("vhost.socket");
+ if (g_vhost_ctrlr == NULL) {
+ fprintf(stderr, "Construct vhost scsi controller failed\n");
+ return 0;
+ }
+
+ if (sem_init(&exit_sem, 0, 0) < 0) {
+ fprintf(stderr, "Error init exit_sem\n");
+ return -1;
+ }
+
+ rte_vhost_driver_start(dev_pathname);
+
+ /* loop for exit the application */
+ while (1)
+ sleep(1);
+
+ return 0;
+}
+
diff --git a/examples/vhost_scsi/vhost_scsi.h b/examples/vhost_scsi/vhost_scsi.h
new file mode 100644
index 0000000..edb416d
--- /dev/null
+++ b/examples/vhost_scsi/vhost_scsi.h
@@ -0,0 +1,108 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VHOST_SCSI_H_
+#define _VHOST_SCSI_H_
+
+#include <sys/uio.h>
+#include <stdint.h>
+#include <linux/virtio_scsi.h>
+#include <linux/virtio_ring.h>
+
+#include <rte_vhost.h>
+
+struct vhost_scsi_queue {
+ struct rte_vhost_vring vq;
+ uint16_t last_avail_idx;
+ uint16_t last_used_idx;
+};
+
+#define NUM_OF_SCSI_QUEUES 3
+
+struct vhost_block_dev {
+ /** ID for vhost library. */
+ int vid;
+ /** Queues for the block device */
+ struct vhost_scsi_queue queues[NUM_OF_SCSI_QUEUES];
+ /** Unique name for this block device. */
+ char name[64];
+
+ /** Unique product name for this kind of block device. */
+ char product_name[256];
+
+ /** Size in bytes of a logical block for the backend */
+ uint32_t blocklen;
+
+ /** Number of blocks */
+ uint64_t blockcnt;
+
+ /** write cache enabled, not used at the moment */
+ int write_cache;
+
+ /** use memory as disk storage space */
+ uint8_t *data;
+};
+
+struct vhost_scsi_ctrlr {
+ /** Only support 1 LUN for the example */
+ struct vhost_block_dev *bdev;
+ /** VM memory region */
+ struct rte_vhost_memory *mem;
+} __rte_cache_aligned;
+
+#define VHOST_SCSI_MAX_IOVS 128
+
+enum scsi_data_dir {
+ SCSI_DIR_NONE = 0,
+ SCSI_DIR_TO_DEV = 1,
+ SCSI_DIR_FROM_DEV = 2,
+};
+
+struct vhost_scsi_task {
+ int req_idx;
+ uint32_t dxfer_dir;
+ uint32_t data_len;
+ struct virtio_scsi_cmd_req *req;
+ struct virtio_scsi_cmd_resp *resp;
+ struct iovec iovs[VHOST_SCSI_MAX_IOVS];
+ uint32_t iovs_cnt;
+ struct vring_desc *desc;
+ struct rte_vhost_vring *vq;
+ struct vhost_block_dev *bdev;
+ struct vhost_scsi_ctrlr *ctrlr;
+};
+
+int vhost_bdev_process_scsi_commands(struct vhost_block_dev *bdev,
+ struct vhost_scsi_task *task);
+
+#endif /* _VHOST_SCSI_H_ */