DPDK  18.11.11
examples/vhost_scsi/scsi.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2017 Intel Corporation
*/
#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 <rte_string_fns.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;
strlcpy((char *)vpage->params, bdev->name,
sizeof(vpage->params));
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;
strlcpy((char *)desig->desig, "INTEL", 8);
vhost_strcpy_pad((char *)&desig->desig[8],
bdev->product_name, 16, ' ');
strlcpy((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 */
strlcpy((char *)inqdata->t10_vendor_id, "INTEL",
sizeof(inqdata->t10_vendor_id));
/* PRODUCT IDENTIFICATION */
snprintf((char *)inqdata->product_id,
RTE_DIM(inqdata->product_id), "%s",
bdev->product_name);
/* PRODUCT REVISION LEVEL */
strlcpy((char *)inqdata->product_rev, "0001",
sizeof(inqdata->product_rev));
/* 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;
}