Skip to content

L
linux
Commit 22017ed2 authored by Douglas Gilbert's avatar Douglas Gilbert Committed by Christoph Hellwig
Browse files
Options

scsi_debug: pinpoint invalid field in sense data 

Use Sense Key Specific field in the sense data of an ILLEGAL REQUEST
to optionally pinpoint the location of the problem field. This may
be either in the cdb or the associated parameter list.
Signed-off-by: default avatarDouglas Gilbert <dgilbert@interlog.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 84021c90
Show whitespace changes
Inline Side-by-side
Showing with 88 additions and 50 deletions
drivers/scsi/scsi_debug.c
View file @ 22017ed2
...@@ -63,31 +63,34 @@ ...@@ -63,31 +63,34 @@
#include "sd.h" #include "sd.h"
#include "scsi_logging.h" #include "scsi_logging.h"
#define SCSI_DEBUG_VERSION "1.84" #define SCSI_DEBUG_VERSION "1.85"
static const char *scsi_debug_version_date = "20140706"; static const char *scsi_debug_version_date = "20141022";
#define MY_NAME "scsi_debug" #define MY_NAME "scsi_debug"
/* Additional Sense Code (ASC) */ /* Additional Sense Code (ASC) */
#define NO_ADDITIONAL_SENSE 0x0 #define NO_ADDITIONAL_SENSE 0x0
#define LOGICAL_UNIT_NOT_READY 0x4 #define LOGICAL_UNIT_NOT_READY 0x4
#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
#define UNRECOVERED_READ_ERR 0x11 #define UNRECOVERED_READ_ERR 0x11
#define PARAMETER_LIST_LENGTH_ERR 0x1a #define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20 #define INVALID_OPCODE 0x20
#define ADDR_OUT_OF_RANGE 0x21
#define INVALID_COMMAND_OPCODE 0x20 #define INVALID_COMMAND_OPCODE 0x20
#define LBA_OUT_OF_RANGE 0x21
#define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26 #define INVALID_FIELD_IN_PARAM_LIST 0x26
#define UA_RESET_ASC 0x29 #define UA_RESET_ASC 0x29
#define UA_CHANGED_ASC 0x2a #define UA_CHANGED_ASC 0x2a
#define INSUFF_RES_ASC 0x55
#define INSUFF_RES_ASCQ 0x3
#define POWER_ON_RESET_ASCQ 0x0 #define POWER_ON_RESET_ASCQ 0x0
#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
#define CAPACITY_CHANGED_ASCQ 0x9
#define SAVING_PARAMS_UNSUP 0x39 #define SAVING_PARAMS_UNSUP 0x39
#define TRANSPORT_PROBLEM 0x4b #define TRANSPORT_PROBLEM 0x4b
#define THRESHOLD_EXCEEDED 0x5d #define THRESHOLD_EXCEEDED 0x5d
#define LOW_POWER_COND_ON 0x5e #define LOW_POWER_COND_ON 0x5e
#define MISCOMPARE_VERIFY_ASC 0x1d
/* Additional Sense Code Qualifier (ASCQ) */ /* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3 #define ACK_NAK_TO 0x3
...@@ -394,6 +397,50 @@ static void sdebug_max_tgts_luns(void) ...@@ -394,6 +397,50 @@ static void sdebug_max_tgts_luns(void)
spin_unlock(&sdebug_host_list_lock); spin_unlock(&sdebug_host_list_lock);
} }
enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
/* Set in_bit to -1 to indicate no bit position of invalid field */
static void
mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
int in_byte, int in_bit)
{
unsigned char *sbuff;
u8 sks[4];
int sl, asc;
sbuff = scp->sense_buffer;
if (!sbuff) {
sdev_printk(KERN_ERR, scp->device,
"%s: sense_buffer is NULL\n", __func__);
return;
}
asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
asc, 0);
memset(sks, 0, sizeof(sks));
sks[0] = 0x80;
if (c_d)
sks[0] |= 0x40;
if (in_bit >= 0) {
sks[0] |= 0x8;
sks[0] |= 0x7 & in_bit;
}
put_unaligned_be16(in_byte, sks + 1);
if (scsi_debug_dsense) {
sl = sbuff[7] + 8;
sbuff[7] = sl;
sbuff[sl] = 0x2;
sbuff[sl + 1] = 0x6;
memcpy(sbuff + sl + 4, sks, 3);
} else
memcpy(sbuff + 15, sks, 3);
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
"]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
}
static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
{ {
unsigned char *sbuff; unsigned char *sbuff;
...@@ -414,6 +461,12 @@ static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) ...@@ -414,6 +461,12 @@ static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
my_name, key, asc, asq); my_name, key, asc, asq);
} }
static void
mk_sense_invalid_opcode(struct scsi_cmnd *scp)
{
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
}
static void get_data_transfer_info(unsigned char *cmd, static void get_data_transfer_info(unsigned char *cmd,
unsigned long long *lba, unsigned int *num, unsigned long long *lba, unsigned int *num,
u32 *ei_lba) u32 *ei_lba)
...@@ -944,8 +997,7 @@ static int resp_inquiry(struct scsi_cmnd *scp, int target, ...@@ -944,8 +997,7 @@ static int resp_inquiry(struct scsi_cmnd *scp, int target,
pq_pdt = (scsi_debug_ptype & 0x1f); pq_pdt = (scsi_debug_ptype & 0x1f);
arr[0] = pq_pdt; arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */ if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
0);
kfree(arr); kfree(arr);
return check_condition_result; return check_condition_result;
} else if (0x1 & cmd[1]) { /* EVPD bit set */ } else if (0x1 & cmd[1]) { /* EVPD bit set */
...@@ -1029,9 +1081,7 @@ static int resp_inquiry(struct scsi_cmnd *scp, int target, ...@@ -1029,9 +1081,7 @@ static int resp_inquiry(struct scsi_cmnd *scp, int target,
arr[1] = cmd[2]; /*sanity */ arr[1] = cmd[2]; /*sanity */
arr[3] = inquiry_evpd_b2(&arr[4]); arr[3] = inquiry_evpd_b2(&arr[4]);
} else { } else {
/* Illegal request, invalid field in cdb */ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
kfree(arr); kfree(arr);
return check_condition_result; return check_condition_result;
} }
...@@ -1123,8 +1173,7 @@ static int resp_start_stop(struct scsi_cmnd * scp, ...@@ -1123,8 +1173,7 @@ static int resp_start_stop(struct scsi_cmnd * scp,
return errsts; return errsts;
power_cond = (cmd[4] & 0xf0) >> 4; power_cond = (cmd[4] & 0xf0) >> 4;
if (power_cond) { if (power_cond) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
0);
return check_condition_result; return check_condition_result;
} }
start = cmd[4] & 1; start = cmd[4] & 1;
...@@ -1542,8 +1591,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, ...@@ -1542,8 +1591,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
/* TODO: Control Extension page */ /* TODO: Control Extension page */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
0);
return check_condition_result; return check_condition_result;
} }
switch (pcode) { switch (pcode) {
...@@ -1569,8 +1617,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, ...@@ -1569,8 +1617,7 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
break; break;
case 0x19: /* if spc==1 then sas phy, control+discover */ case 0x19: /* if spc==1 then sas phy, control+discover */
if ((subpcode > 0x2) && (subpcode < 0xff)) { if ((subpcode > 0x2) && (subpcode < 0xff)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
len = 0; len = 0;
...@@ -1602,15 +1649,13 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target, ...@@ -1602,15 +1649,13 @@ static int resp_mode_sense(struct scsi_cmnd * scp, int target,
} }
len += resp_iec_m_pg(ap + len, pcontrol, target); len += resp_iec_m_pg(ap + len, pcontrol, target);
} else { } else {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
offset += len; offset += len;
break; break;
default: default:
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
0);
return check_condition_result; return check_condition_result;
} }
if (msense_6) if (msense_6)
...@@ -1640,8 +1685,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, ...@@ -1640,8 +1685,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
sp = cmd[1] & 0x1; sp = cmd[1] & 0x1;
param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]); param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
res = fetch_to_dev_buffer(scp, arr, param_len); res = fetch_to_dev_buffer(scp, arr, param_len);
...@@ -1655,16 +1699,14 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, ...@@ -1655,16 +1699,14 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2); md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]); bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
if (md_len > 2) { if (md_len > 2) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result; return check_condition_result;
} }
off = bd_len + (mselect6 ? 4 : 8); off = bd_len + (mselect6 ? 4 : 8);
mpage = arr[off] & 0x3f; mpage = arr[off] & 0x3f;
ps = !!(arr[off] & 0x80); ps = !!(arr[off] & 0x80);
if (ps) { if (ps) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result; return check_condition_result;
} }
spf = !!(arr[off] & 0x40); spf = !!(arr[off] & 0x40);
...@@ -1701,8 +1743,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6, ...@@ -1701,8 +1743,7 @@ static int resp_mode_select(struct scsi_cmnd * scp, int mselect6,
default: default:
break; break;
} }
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
INVALID_FIELD_IN_PARAM_LIST, 0);
return check_condition_result; return check_condition_result;
set_mode_changed_ua: set_mode_changed_ua:
set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
...@@ -1748,8 +1789,7 @@ static int resp_log_sense(struct scsi_cmnd * scp, ...@@ -1748,8 +1789,7 @@ static int resp_log_sense(struct scsi_cmnd * scp,
ppc = cmd[1] & 0x2; ppc = cmd[1] & 0x2;
sp = cmd[1] & 0x1; sp = cmd[1] & 0x1;
if (ppc || sp) { if (ppc || sp) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
pcontrol = (cmd[2] & 0xc0) >> 6; pcontrol = (cmd[2] & 0xc0) >> 6;
...@@ -1773,8 +1813,7 @@ static int resp_log_sense(struct scsi_cmnd * scp, ...@@ -1773,8 +1813,7 @@ static int resp_log_sense(struct scsi_cmnd * scp,
arr[3] = resp_ie_l_pg(arr + 4); arr[3] = resp_ie_l_pg(arr + 4);
break; break;
default: default:
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
} else if (0xff == subpcode) { } else if (0xff == subpcode) {
...@@ -1806,13 +1845,11 @@ static int resp_log_sense(struct scsi_cmnd * scp, ...@@ -1806,13 +1845,11 @@ static int resp_log_sense(struct scsi_cmnd * scp,
arr[3] = n - 4; arr[3] = n - 4;
break; break;
default: default:
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
} else { } else {
mk_sense_buffer(scp, ILLEGAL_REQUEST, mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len); len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
...@@ -1824,11 +1861,12 @@ static int check_device_access_params(struct scsi_cmnd *scp, ...@@ -1824,11 +1861,12 @@ static int check_device_access_params(struct scsi_cmnd *scp,
unsigned long long lba, unsigned int num) unsigned long long lba, unsigned int num)
{ {
if (lba + num > sdebug_capacity) { if (lba + num > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, ADDR_OUT_OF_RANGE, 0); mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result; return check_condition_result;
} }
/* transfer length excessive (tie in to block limits VPD page) */ /* transfer length excessive (tie in to block limits VPD page) */
if (num > sdebug_store_sectors) { if (num > sdebug_store_sectors) {
/* needs work to find which cdb byte 'num' comes from */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result; return check_condition_result;
} }
...@@ -2412,8 +2450,8 @@ static int resp_report_luns(struct scsi_cmnd * scp, ...@@ -2412,8 +2450,8 @@ static int resp_report_luns(struct scsi_cmnd * scp,
struct sdebug_dev_info * devip) struct sdebug_dev_info * devip)
{ {
unsigned int alloc_len; unsigned int alloc_len;
int lun_cnt, i, upper, num, n; int lun_cnt, i, upper, num, n, want_wlun, shortish;
u64 wlun, lun; u64 lun;
unsigned char *cmd = scp->cmnd; unsigned char *cmd = scp->cmnd;
int select_report = (int)cmd[2]; int select_report = (int)cmd[2];
struct scsi_lun *one_lun; struct scsi_lun *one_lun;
...@@ -2421,9 +2459,9 @@ static int resp_report_luns(struct scsi_cmnd * scp, ...@@ -2421,9 +2459,9 @@ static int resp_report_luns(struct scsi_cmnd * scp,
unsigned char * max_addr; unsigned char * max_addr;
alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24); alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
if ((alloc_len < 4) || (select_report > 2)) { shortish = (alloc_len < 4);
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, if (shortish || (select_report > 2)) {
0); mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
return check_condition_result; return check_condition_result;
} }
/* can produce response with up to 16k luns (lun 0 to lun 16383) */ /* can produce response with up to 16k luns (lun 0 to lun 16383) */
...@@ -2433,14 +2471,14 @@ static int resp_report_luns(struct scsi_cmnd * scp, ...@@ -2433,14 +2471,14 @@ static int resp_report_luns(struct scsi_cmnd * scp,
lun_cnt = 0; lun_cnt = 0;
else if (scsi_debug_no_lun_0 && (lun_cnt > 0)) else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
--lun_cnt; --lun_cnt;
wlun = (select_report > 0) ? 1 : 0; want_wlun = (select_report > 0) ? 1 : 0;
num = lun_cnt + wlun; num = lun_cnt + want_wlun;
arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff; arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
arr[3] = (sizeof(struct scsi_lun) * num) & 0xff; arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) / n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
sizeof(struct scsi_lun)), num); sizeof(struct scsi_lun)), num);
if (n < num) { if (n < num) {
wlun = 0; want_wlun = 0;
lun_cnt = n; lun_cnt = n;
} }
one_lun = (struct scsi_lun *) &arr[8]; one_lun = (struct scsi_lun *) &arr[8];
...@@ -2454,7 +2492,7 @@ static int resp_report_luns(struct scsi_cmnd * scp, ...@@ -2454,7 +2492,7 @@ static int resp_report_luns(struct scsi_cmnd * scp,
(upper | (SAM2_LUN_ADDRESS_METHOD << 6)); (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
one_lun[i].scsi_lun[1] = lun & 0xff; one_lun[i].scsi_lun[1] = lun & 0xff;
} }
if (wlun) { if (want_wlun) {
one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff; one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff; one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
i++; i++;
...@@ -2476,8 +2514,8 @@ static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, ...@@ -2476,8 +2514,8 @@ static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
/* better not to use temporary buffer. */ /* better not to use temporary buffer. */
buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
if (!buf) { if (!buf) {
mk_sense_buffer(scp, NOT_READY, mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
LOGICAL_UNIT_COMMUNICATION_FAILURE, 0); INSUFF_RES_ASCQ);
return check_condition_result; return check_condition_result;
} }
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7