[SCSI] scsi_debug: Implement support for DIF Type 2
Add support for 32-byte READ/WRITE as well as DIF Type 2 protection.
Reject protected 10/12/16 byte READ/WRITE commands when Type 2 is
enabled.
Verify Type 2 reference tag according to Expected Initial LBA in 32-byte
CDB.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index fb9af20..c4103be 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -50,6 +50,7 @@
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_eh.h>
+#include <scsi/scsi_dbg.h>
#include "sd.h"
#include "scsi_logging.h"
@@ -64,6 +65,7 @@
#define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20
#define ADDR_OUT_OF_RANGE 0x21
+#define INVALID_COMMAND_OPCODE 0x20
#define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26
#define POWERON_RESET 0x29
@@ -180,7 +182,7 @@
#define SDEBUG_SENSE_LEN 32
#define SCSI_DEBUG_CANQUEUE 255
-#define SCSI_DEBUG_MAX_CMD_LEN 16
+#define SCSI_DEBUG_MAX_CMD_LEN 32
struct sdebug_dev_info {
struct list_head dev_list;
@@ -296,9 +298,25 @@
}
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)
{
+ *ei_lba = 0;
+
switch (*cmd) {
+ case VARIABLE_LENGTH_CMD:
+ *lba = (u64)cmd[19] | (u64)cmd[18] << 8 |
+ (u64)cmd[17] << 16 | (u64)cmd[16] << 24 |
+ (u64)cmd[15] << 32 | (u64)cmd[14] << 40 |
+ (u64)cmd[13] << 48 | (u64)cmd[12] << 56;
+
+ *ei_lba = (u32)cmd[23] | (u32)cmd[22] << 8 |
+ (u32)cmd[21] << 16 | (u32)cmd[20] << 24;
+
+ *num = (u32)cmd[31] | (u32)cmd[30] << 8 | (u32)cmd[29] << 16 |
+ (u32)cmd[28] << 24;
+ break;
+
case WRITE_16:
case READ_16:
*lba = (u64)cmd[9] | (u64)cmd[8] << 8 |
@@ -1589,7 +1607,7 @@
}
static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
- unsigned int sectors)
+ unsigned int sectors, u32 ei_lba)
{
unsigned int i, resid;
struct scatterlist *psgl;
@@ -1636,13 +1654,23 @@
return 0x01;
}
- if (scsi_debug_dif != SD_DIF_TYPE3_PROTECTION &&
+ if (scsi_debug_dif == SD_DIF_TYPE1_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;
}
+
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ be32_to_cpu(sdt[i].ref_tag) != ei_lba) {
+ printk(KERN_ERR "%s: REF check failed on sector %lu\n",
+ __func__, (unsigned long)sector);
+ dif_errors++;
+ return 0x03;
+ }
+
+ ei_lba++;
}
resid = sectors * 8; /* Bytes of protection data to copy into sgl */
@@ -1670,7 +1698,8 @@
}
static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
- unsigned int num, struct sdebug_dev_info *devip)
+ unsigned int num, struct sdebug_dev_info *devip,
+ u32 ei_lba)
{
unsigned long iflags;
int ret;
@@ -1699,7 +1728,7 @@
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
- int prot_ret = prot_verify_read(SCpnt, lba, num);
+ int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
if (prot_ret) {
mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
@@ -1735,7 +1764,7 @@
}
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
- unsigned int sectors)
+ unsigned int sectors, u32 ei_lba)
{
int i, j, ret;
struct sd_dif_tuple *sdt;
@@ -1749,11 +1778,6 @@
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);
@@ -1808,7 +1832,7 @@
goto out;
}
- if (scsi_debug_dif != SD_DIF_TYPE3_PROTECTION &&
+ if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
be32_to_cpu(sdt->ref_tag)
!= (start_sec & 0xffffffff)) {
printk(KERN_ERR
@@ -1819,6 +1843,16 @@
goto out;
}
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ be32_to_cpu(sdt->ref_tag) != ei_lba) {
+ 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
@@ -1832,6 +1866,7 @@
sector = 0; /* Force wrap */
start_sec++;
+ ei_lba++;
daddr += scsi_debug_sector_size;
ppage_offset += sizeof(struct sd_dif_tuple);
}
@@ -1853,7 +1888,8 @@
}
static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
- unsigned int num, struct sdebug_dev_info *devip)
+ unsigned int num, struct sdebug_dev_info *devip,
+ u32 ei_lba)
{
unsigned long iflags;
int ret;
@@ -1864,7 +1900,7 @@
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
- int prot_ret = prot_verify_write(SCpnt, lba, num);
+ int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
if (prot_ret) {
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
@@ -2872,11 +2908,12 @@
case SD_DIF_TYPE0_PROTECTION:
case SD_DIF_TYPE1_PROTECTION:
+ case SD_DIF_TYPE2_PROTECTION:
case SD_DIF_TYPE3_PROTECTION:
break;
default:
- printk(KERN_ERR "scsi_debug_init: dif must be 0, 1 or 3\n");
+ printk(KERN_ERR "scsi_debug_init: dif must be 0, 1, 2 or 3\n");
return -EINVAL;
}
@@ -3121,6 +3158,7 @@
int len, k;
unsigned int num;
unsigned long long lba;
+ u32 ei_lba;
int errsts = 0;
int target = SCpnt->device->id;
struct sdebug_dev_info *devip = NULL;
@@ -3254,14 +3292,30 @@
case READ_16:
case READ_12:
case READ_10:
+ /* READ{10,12,16} and DIF Type 2 are natural enemies */
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ cmd[1] & 0xe0) {
+ mk_sense_buffer(devip, ILLEGAL_REQUEST,
+ INVALID_COMMAND_OPCODE, 0);
+ errsts = check_condition_result;
+ break;
+ }
+
+ if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
+ scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
+ (cmd[1] & 0xe0) == 0)
+ printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
+
+ /* fall through */
case READ_6:
+read:
errsts = check_readiness(SCpnt, 0, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
- get_data_transfer_info(cmd, &lba, &num);
- errsts = resp_read(SCpnt, lba, num, devip);
+ get_data_transfer_info(cmd, &lba, &num, &ei_lba);
+ errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
@@ -3288,14 +3342,30 @@
case WRITE_16:
case WRITE_12:
case WRITE_10:
+ /* WRITE{10,12,16} and DIF Type 2 are natural enemies */
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
+ cmd[1] & 0xe0) {
+ mk_sense_buffer(devip, ILLEGAL_REQUEST,
+ INVALID_COMMAND_OPCODE, 0);
+ errsts = check_condition_result;
+ break;
+ }
+
+ if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
+ scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
+ (cmd[1] & 0xe0) == 0)
+ printk(KERN_ERR "Unprotected RD/WR to DIF device\n");
+
+ /* fall through */
case WRITE_6:
+write:
errsts = check_readiness(SCpnt, 0, devip);
if (errsts)
break;
if (scsi_debug_fake_rw)
break;
- get_data_transfer_info(cmd, &lba, &num);
- errsts = resp_write(SCpnt, lba, num, devip);
+ get_data_transfer_info(cmd, &lba, &num, &ei_lba);
+ errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
if (inj_recovered && (0 == errsts)) {
mk_sense_buffer(devip, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
@@ -3341,15 +3411,38 @@
break;
if (scsi_debug_fake_rw)
break;
- get_data_transfer_info(cmd, &lba, &num);
- errsts = resp_read(SCpnt, lba, num, devip);
+ get_data_transfer_info(cmd, &lba, &num, &ei_lba);
+ errsts = resp_read(SCpnt, lba, num, devip, ei_lba);
if (errsts)
break;
- errsts = resp_write(SCpnt, lba, num, devip);
+ errsts = resp_write(SCpnt, lba, num, devip, ei_lba);
if (errsts)
break;
errsts = resp_xdwriteread(SCpnt, lba, num, devip);
break;
+ case VARIABLE_LENGTH_CMD:
+ if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION) {
+
+ if ((cmd[10] & 0xe0) == 0)
+ printk(KERN_ERR
+ "Unprotected RD/WR to DIF device\n");
+
+ if (cmd[9] == READ_32) {
+ BUG_ON(SCpnt->cmd_len < 32);
+ goto read;
+ }
+
+ if (cmd[9] == WRITE_32) {
+ BUG_ON(SCpnt->cmd_len < 32);
+ goto write;
+ }
+ }
+
+ mk_sense_buffer(devip, ILLEGAL_REQUEST,
+ INVALID_FIELD_IN_CDB, 0);
+ errsts = check_condition_result;
+ break;
+
default:
if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
printk(KERN_INFO "scsi_debug: Opcode: 0x%x not "