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[SCSI] scsi_debug: DIF/DIX support 

This patch adds support for DIX and DIF in scsi_debug.  A separate
buffer is allocated for the protection information.

 - The dix parameter indicates whether the controller supports DIX
   (protection information DMA)

 - The dif parameter indicates whether the simulated storage device
   supports DIF

 - The guard parameter switches between T10 CRC(0) and IP checksum(1)

 - The ato parameter indicates whether the application tag is owned by
   the disk(0) or the OS(1)

 - DIF and DIX errors can be triggered using the scsi_debug_opts mask

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Martin K. Petersen 2009-01-04 03:08:19 -05:00 committed by James Bottomley
parent 59d3270326
commit c6a4428741
1 changed files with 436 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

443
drivers/scsi/scsi_debug.c
View File

@ -40,6 +40,9 @@
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/blkdev.h>
#include <linux/crc-t10dif.h>
#include <net/checksum.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@ -48,8 +51,7 @@
#include <scsi/scsicam.h>
#include <scsi/scsi_eh.h>
#include <linux/stat.h>
#include "sd.h"
#include "scsi_logging.h"
#define SCSI_DEBUG_VERSION "1.81"
@ -95,6 +97,10 @@ static const char * scsi_debug_version_date = "20070104";
#define DEF_FAKE_RW 0
#define DEF_VPD_USE_HOSTNO 1
#define DEF_SECTOR_SIZE 512
#define DEF_DIX 0
#define DEF_DIF 0
#define DEF_GUARD 0
#define DEF_ATO 1
/* bit mask values for scsi_debug_opts */
#define SCSI_DEBUG_OPT_NOISE 1
@ -102,6 +108,8 @@ static const char * scsi_debug_version_date = "20070104";
#define SCSI_DEBUG_OPT_TIMEOUT 4
#define SCSI_DEBUG_OPT_RECOVERED_ERR 8
#define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
#define SCSI_DEBUG_OPT_DIF_ERR 32
#define SCSI_DEBUG_OPT_DIX_ERR 64
/* When "every_nth" > 0 then modulo "every_nth" commands:
* - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
* - a RECOVERED_ERROR is simulated on successful read and write
@ -144,6 +152,10 @@ static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
static int scsi_debug_fake_rw = DEF_FAKE_RW;
static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
static int scsi_debug_dix = DEF_DIX;
static int scsi_debug_dif = DEF_DIF;
static int scsi_debug_guard = DEF_GUARD;
static int scsi_debug_ato = DEF_ATO;
static int scsi_debug_cmnd_count = 0;
@ -204,11 +216,15 @@ struct sdebug_queued_cmd {
static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
static unsigned char * fake_storep; /* ramdisk storage */
static unsigned char *dif_storep; /* protection info */
static int num_aborts = 0;
static int num_dev_resets = 0;
static int num_bus_resets = 0;
static int num_host_resets = 0;
static int dix_writes;
static int dix_reads;
static int dif_errors;
static DEFINE_SPINLOCK(queued_arr_lock);
static DEFINE_RWLOCK(atomic_rw);
@ -217,6 +233,11 @@ static char sdebug_proc_name[] = "scsi_debug";
static struct bus_type pseudo_lld_bus;
static inline sector_t dif_offset(sector_t sector)
{
return sector << 3;
}
static struct device_driver sdebug_driverfs_driver = {
.name = sdebug_proc_name,
.bus = &pseudo_lld_bus,
@ -225,6 +246,9 @@ static struct device_driver sdebug_driverfs_driver = {
static const int check_condition_result =
(DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
static const int illegal_condition_result =
(DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
@ -726,7 +750,12 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
} else if (0x86 == cmd[2]) { /* extended inquiry */
arr[1] = cmd[2]; /*sanity */
arr[3] = 0x3c; /* number of following entries */
arr[4] = 0x0; /* no protection stuff */
if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
else if (scsi_debug_dif)
arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
else
arr[4] = 0x0; /* no protection stuff */
arr[5] = 0x7; /* head of q, ordered + simple q's */
} else if (0x87 == cmd[2]) { /* mode page policy */
arr[1] = cmd[2]; /*sanity */
@ -767,6 +796,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
arr[2] = scsi_debug_scsi_level;
arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
if (0 == scsi_debug_vpd_use_hostno)
arr[5] = 0x10; /* claim: implicit TGPS */
arr[6] = 0x10; /* claim: MultiP */
@ -915,6 +945,12 @@ static int resp_readcap16(struct scsi_cmnd * scp,
arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
arr[11] = scsi_debug_sector_size & 0xff;
if (scsi_debug_dif) {
arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
arr[12] |= 1; /* PROT_EN */
}
return fill_from_dev_buffer(scp, arr,
min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
}
@ -1066,6 +1102,10 @@ static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
ctrl_m_pg[2] |= 0x4;
else
ctrl_m_pg[2] &= ~0x4;
if (scsi_debug_ato)
ctrl_m_pg[5] |= 0x80; /* ATO=1 */
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
@ -1536,6 +1576,87 @@ static int do_device_access(struct scsi_cmnd *scmd,
return ret;
}
static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors)
{
unsigned int i, resid;
struct scatterlist *psgl;
struct sd_dif_tuple *sdt;
sector_t sector;
sector_t tmp_sec = start_sec;
void *paddr;
start_sec = do_div(tmp_sec, sdebug_store_sectors);
sdt = (struct sd_dif_tuple *)(dif_storep + dif_offset(start_sec));
for (i = 0 ; i < sectors ; i++) {
u16 csum;
if (sdt[i].app_tag == 0xffff)
continue;
sector = start_sec + i;
switch (scsi_debug_guard) {
case 1:
csum = ip_compute_csum(fake_storep +
sector * scsi_debug_sector_size,
scsi_debug_sector_size);
break;
case 0:
csum = crc_t10dif(fake_storep +
sector * scsi_debug_sector_size,
scsi_debug_sector_size);
csum = cpu_to_be16(csum);
break;
default:
BUG();
}
if (sdt[i].guard_tag != csum) {
printk(KERN_ERR "%s: GUARD check failed on sector %lu" \
" rcvd 0x%04x, data 0x%04x\n", __func__,
(unsigned long)sector,
be16_to_cpu(sdt[i].guard_tag),
be16_to_cpu(csum));
dif_errors++;
return 0x01;
}
if (scsi_debug_dif != SD_DIF_TYPE3_PROTECTION &&
be32_to_cpu(sdt[i].ref_tag) != (sector & 0xffffffff)) {
printk(KERN_ERR "%s: REF check failed on sector %lu\n",
__func__, (unsigned long)sector);
dif_errors++;
return 0x03;
}
}
resid = sectors * 8; /* Bytes of protection data to copy into sgl */
sector = start_sec;
scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
int len = min(psgl->length, resid);
paddr = kmap_atomic(sg_page(psgl), KM_IRQ0) + psgl->offset;
memcpy(paddr, dif_storep + dif_offset(sector), len);
sector += len >> 3;
if (sector >= sdebug_store_sectors) {
/* Force wrap */
tmp_sec = sector;
sector = do_div(tmp_sec, sdebug_store_sectors);
}
resid -= len;
kunmap_atomic(paddr, KM_IRQ0);
}
dix_reads++;
return 0;
}
static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
@ -1563,12 +1684,162 @@ static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
}
return check_condition_result;
}
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_read(SCpnt, lba, num);
if (prot_ret) {
mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
return illegal_condition_result;
}
}
read_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 0);
read_unlock_irqrestore(&atomic_rw, iflags);
return ret;
}
void dump_sector(unsigned char *buf, int len)
{
int i, j;
printk(KERN_ERR ">>> Sector Dump <<<\n");
for (i = 0 ; i < len ; i += 16) {
printk(KERN_ERR "%04d: ", i);
for (j = 0 ; j < 16 ; j++) {
unsigned char c = buf[i+j];
if (c >= 0x20 && c < 0x7e)
printk(" %c ", buf[i+j]);
else
printk("%02x ", buf[i+j]);
}
printk("\n");
}
}
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors)
{
int i, j, ret;
struct sd_dif_tuple *sdt;
struct scatterlist *dsgl = scsi_sglist(SCpnt);
struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
void *daddr, *paddr;
sector_t tmp_sec = start_sec;
sector_t sector;
int ppage_offset;
unsigned short csum;
sector = do_div(tmp_sec, sdebug_store_sectors);
if (((SCpnt->cmnd[1] >> 5) & 7) != 1) {
printk(KERN_WARNING "scsi_debug: WRPROTECT != 1\n");
return 0;
}
BUG_ON(scsi_sg_count(SCpnt) == 0);
BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
paddr = kmap_atomic(sg_page(psgl), KM_IRQ1) + psgl->offset;
ppage_offset = 0;
/* For each data page */
scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
daddr = kmap_atomic(sg_page(dsgl), KM_IRQ0) + dsgl->offset;
/* For each sector-sized chunk in data page */
for (j = 0 ; j < dsgl->length ; j += scsi_debug_sector_size) {
/* If we're at the end of the current
* protection page advance to the next one
*/
if (ppage_offset >= psgl->length) {
kunmap_atomic(paddr, KM_IRQ1);
psgl = sg_next(psgl);
BUG_ON(psgl == NULL);
paddr = kmap_atomic(sg_page(psgl), KM_IRQ1)
+ psgl->offset;
ppage_offset = 0;
}
sdt = paddr + ppage_offset;
switch (scsi_debug_guard) {
case 1:
csum = ip_compute_csum(daddr,
scsi_debug_sector_size);
break;
case 0:
csum = cpu_to_be16(crc_t10dif(daddr,
scsi_debug_sector_size));
break;
default:
BUG();
ret = 0;
goto out;
}
if (sdt->guard_tag != csum) {
printk(KERN_ERR
"%s: GUARD check failed on sector %lu " \
"rcvd 0x%04x, calculated 0x%04x\n",
__func__, (unsigned long)sector,
be16_to_cpu(sdt->guard_tag),
be16_to_cpu(csum));
ret = 0x01;
dump_sector(daddr, scsi_debug_sector_size);
goto out;
}
if (scsi_debug_dif != SD_DIF_TYPE3_PROTECTION &&
be32_to_cpu(sdt->ref_tag)
!= (start_sec & 0xffffffff)) {
printk(KERN_ERR
"%s: REF check failed on sector %lu\n",
__func__, (unsigned long)sector);
ret = 0x03;
dump_sector(daddr, scsi_debug_sector_size);
goto out;
}
/* Would be great to copy this in bigger
* chunks. However, for the sake of
* correctness we need to verify each sector
* before writing it to "stable" storage
*/
memcpy(dif_storep + dif_offset(sector), sdt, 8);
sector++;
if (sector == sdebug_store_sectors)
sector = 0; /* Force wrap */
start_sec++;
daddr += scsi_debug_sector_size;
ppage_offset += sizeof(struct sd_dif_tuple);
}
kunmap_atomic(daddr, KM_IRQ0);
}
kunmap_atomic(paddr, KM_IRQ1);
dix_writes++;
return 0;
out:
dif_errors++;
kunmap_atomic(daddr, KM_IRQ0);
kunmap_atomic(paddr, KM_IRQ1);
return ret;
}
static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
@ -1579,6 +1850,16 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
if (ret)
return ret;
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_write(SCpnt, lba, num);
if (prot_ret) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
return illegal_condition_result;
}
}
write_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 1);
write_unlock_irqrestore(&atomic_rw, iflags);
@ -2095,6 +2376,10 @@ module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
S_IRUGO | S_IWUSR);
module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
module_param_named(guard, scsi_debug_guard, int, S_IRUGO);
module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
@ -2117,7 +2402,10 @@ MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=5[SPC-3])");
MODULE_PARM_DESC(virtual_gb, "virtual gigabyte size (def=0 -> use dev_size_mb)");
MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
MODULE_PARM_DESC(sector_size, "hardware sector size in bytes (def=512)");
MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
static char sdebug_info[256];
@ -2164,14 +2452,14 @@ static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **sta
"delay=%d, max_luns=%d, scsi_level=%d\n"
"sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
"number of aborts=%d, device_reset=%d, bus_resets=%d, "
"host_resets=%d\n",
"host_resets=%d\ndix_reads=%d dix_writes=%d dif_errors=%d\n",
SCSI_DEBUG_VERSION, scsi_debug_version_date, scsi_debug_num_tgts,
scsi_debug_dev_size_mb, scsi_debug_opts, scsi_debug_every_nth,
scsi_debug_cmnd_count, scsi_debug_delay,
scsi_debug_max_luns, scsi_debug_scsi_level,
scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
num_host_resets);
num_host_resets, dix_reads, dix_writes, dif_errors);
if (pos < offset) {
len = 0;
begin = pos;
@ -2452,6 +2740,31 @@ static ssize_t sdebug_sector_size_show(struct device_driver * ddp, char * buf)
}
DRIVER_ATTR(sector_size, S_IRUGO, sdebug_sector_size_show, NULL);
static ssize_t sdebug_dix_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
}
DRIVER_ATTR(dix, S_IRUGO, sdebug_dix_show, NULL);
static ssize_t sdebug_dif_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
}
DRIVER_ATTR(dif, S_IRUGO, sdebug_dif_show, NULL);
static ssize_t sdebug_guard_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_guard);
}
DRIVER_ATTR(guard, S_IRUGO, sdebug_guard_show, NULL);
static ssize_t sdebug_ato_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
}
DRIVER_ATTR(ato, S_IRUGO, sdebug_ato_show, NULL);
/* Note: The following function creates attribute files in the
/sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
files (over those found in the /sys/module/scsi_debug/parameters
@ -2478,11 +2791,19 @@ static int do_create_driverfs_files(void)
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dix);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_dif);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_guard);
ret |= driver_create_file(&sdebug_driverfs_driver, &driver_attr_ato);
return ret;
}
static void do_remove_driverfs_files(void)
{
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_ato);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_guard);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dif);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_dix);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_sector_size);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_vpd_use_hostno);
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_virtual_gb);
@ -2526,11 +2847,33 @@ static int __init scsi_debug_init(void)
case 4096:
break;
default:
printk(KERN_ERR "scsi_debug_init: invalid sector_size %u\n",
printk(KERN_ERR "scsi_debug_init: invalid sector_size %d\n",
scsi_debug_sector_size);
return -EINVAL;
}
switch (scsi_debug_dif) {
case SD_DIF_TYPE0_PROTECTION:
case SD_DIF_TYPE1_PROTECTION:
case SD_DIF_TYPE3_PROTECTION:
break;
default:
printk(KERN_ERR "scsi_debug_init: dif must be 0, 1 or 3\n");
return -EINVAL;
}
if (scsi_debug_guard > 1) {
printk(KERN_ERR "scsi_debug_init: guard must be 0 or 1\n");
return -EINVAL;
}
if (scsi_debug_ato > 1) {
printk(KERN_ERR "scsi_debug_init: ato must be 0 or 1\n");
return -EINVAL;
}
if (scsi_debug_dev_size_mb < 1)
scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
@ -2563,6 +2906,24 @@ static int __init scsi_debug_init(void)
if (scsi_debug_num_parts > 0)
sdebug_build_parts(fake_storep, sz);
if (scsi_debug_dif) {
int dif_size;
dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
dif_storep = vmalloc(dif_size);
printk(KERN_ERR "scsi_debug_init: dif_storep %u bytes @ %p\n",
dif_size, dif_storep);
if (dif_storep == NULL) {
printk(KERN_ERR "scsi_debug_init: out of mem. (DIX)\n");
ret = -ENOMEM;
goto free_vm;
}
memset(dif_storep, 0xff, dif_size);
}
ret = device_register(&pseudo_primary);
if (ret < 0) {
printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
@ -2615,6 +2976,8 @@ static int __init scsi_debug_init(void)
dev_unreg:
device_unregister(&pseudo_primary);
free_vm:
if (dif_storep)
vfree(dif_storep);
vfree(fake_storep);
return ret;
@ -2632,6 +2995,9 @@ static void __exit scsi_debug_exit(void)
bus_unregister(&pseudo_lld_bus);
device_unregister(&pseudo_primary);
if (dif_storep)
vfree(dif_storep);
vfree(fake_storep);
}
@ -2732,6 +3098,8 @@ int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
struct sdebug_dev_info *devip = NULL;
int inj_recovered = 0;
int inj_transport = 0;
int inj_dif = 0;
int inj_dix = 0;
int delay_override = 0;
scsi_set_resid(SCpnt, 0);
@ -2769,6 +3137,10 @@ int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
inj_recovered = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & scsi_debug_opts)
inj_transport = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_DIF_ERR & scsi_debug_opts)
inj_dif = 1; /* to reads and writes below */
else if (SCSI_DEBUG_OPT_DIX_ERR & scsi_debug_opts)
inj_dix = 1; /* to reads and writes below */
}
if (devip->wlun) {
@ -2870,6 +3242,12 @@ int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
mk_sense_buffer(devip, ABORTED_COMMAND,
TRANSPORT_PROBLEM, ACK_NAK_TO);
errsts = check_condition_result;
} else if (inj_dif && (0 == errsts)) {
mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
errsts = illegal_condition_result;
} else if (inj_dix && (0 == errsts)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
errsts = illegal_condition_result;
}
break;
case REPORT_LUNS: /* mandatory, ignore unit attention */
@ -2894,6 +3272,12 @@ int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
mk_sense_buffer(devip, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
errsts = check_condition_result;
} else if (inj_dif && (0 == errsts)) {
mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, 1);
errsts = illegal_condition_result;
} else if (inj_dix && (0 == errsts)) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, 1);
errsts = illegal_condition_result;
}
break;
case MODE_SENSE:
@ -2982,6 +3366,7 @@ static int sdebug_driver_probe(struct device * dev)
int error = 0;
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *hpnt;
int host_prot;
sdbg_host = to_sdebug_host(dev);
@ -3000,6 +3385,50 @@ static int sdebug_driver_probe(struct device * dev)
hpnt->max_id = scsi_debug_num_tgts;
hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
host_prot = 0;
switch (scsi_debug_dif) {
case SD_DIF_TYPE1_PROTECTION:
host_prot = SHOST_DIF_TYPE1_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE1_PROTECTION;
break;
case SD_DIF_TYPE2_PROTECTION:
host_prot = SHOST_DIF_TYPE2_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE2_PROTECTION;
break;
case SD_DIF_TYPE3_PROTECTION:
host_prot = SHOST_DIF_TYPE3_PROTECTION;
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE3_PROTECTION;
break;
default:
if (scsi_debug_dix)
host_prot |= SHOST_DIX_TYPE0_PROTECTION;
break;
}
scsi_host_set_prot(hpnt, host_prot);
printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
(host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
(host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
(host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
(host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
(host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
(host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
(host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
if (scsi_debug_guard == 1)
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
else
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
error = scsi_add_host(hpnt, &sdbg_host->dev);
if (error) {
printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);