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scsi: scsi_debug: add resp_write_scat function 

Add resp_write_scat() function to support decoding WRITE SCATTERED
(16 and 32). Also weave resp_write_scat() into the cdb decoding
logic.

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Douglas Gilbert 2017-12-23 12:48:14 -05:00 коммит произвёл Martin K. Petersen
Родитель 46f64e70b8
Коммит 481b5e5c79
1 изменённых файлов: 176 добавлений и 3 удалений
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179
drivers/scsi/scsi_debug.c
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@ -93,6 +93,7 @@ static const char *sdebug_version_date = "20171202";
#define MISCOMPARE_VERIFY_ASC 0x1d
#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
#define WRITE_ERROR_ASC 0xc
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
@ -331,7 +332,7 @@ enum sdeb_opcode_index {
SDEB_I_MAINT_IN = 14,
SDEB_I_MAINT_OUT = 15,
SDEB_I_VERIFY = 16, /* 10 only */
SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32) */
SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
SDEB_I_RESERVE = 18, /* 6, 10 */
SDEB_I_RELEASE = 19, /* 6, 10 */
SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
@ -400,6 +401,7 @@ static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
@ -461,6 +463,9 @@ static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
{0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
{0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
};
static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
@ -532,8 +537,9 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
{16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA_OUT(16) */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
{ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
@ -3050,6 +3056,173 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
return 0;
}
/*
* T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
* No READ GATHERED yet (requires bidi or long cdb holding gather list).
*/
static int resp_write_scat(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u8 *lrdp = NULL;
u8 *up;
u8 wrprotect;
u16 lbdof, num_lrd, k;
u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
u32 lb_size = sdebug_sector_size;
u32 ei_lba;
u64 lba;
unsigned long iflags;
int ret, res;
bool is_16;
static const u32 lrd_size = 32; /* + parameter list header size */
if (cmd[0] == VARIABLE_LENGTH_CMD) {
is_16 = false;
wrprotect = (cmd[10] >> 5) & 0x7;
lbdof = get_unaligned_be16(cmd + 12);
num_lrd = get_unaligned_be16(cmd + 16);
bt_len = get_unaligned_be32(cmd + 28);
} else { /* that leaves WRITE SCATTERED(16) */
is_16 = true;
wrprotect = (cmd[2] >> 5) & 0x7;
lbdof = get_unaligned_be16(cmd + 4);
num_lrd = get_unaligned_be16(cmd + 8);
bt_len = get_unaligned_be32(cmd + 10);
if (unlikely(have_dif_prot)) {
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
wrprotect) {
mk_sense_invalid_opcode(scp);
return illegal_condition_result;
}
if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
wrprotect == 0)
sdev_printk(KERN_ERR, scp->device,
"Unprotected WR to DIF device\n");
}
}
if ((num_lrd == 0) || (bt_len == 0))
return 0; /* T10 says these do-nothings are not errors */
if (lbdof == 0) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: LB Data Offset field bad\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return illegal_condition_result;
}
lbdof_blen = lbdof * lb_size;
if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: LBA range descriptors don't fit\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return illegal_condition_result;
}
lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
if (lrdp == NULL)
return SCSI_MLQUEUE_HOST_BUSY;
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
my_name, __func__, lbdof_blen);
res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
if (res == -1) {
ret = DID_ERROR << 16;
goto err_out;
}
write_lock_irqsave(&atomic_rw, iflags);
sg_off = lbdof_blen;
/* Spec says Buffer xfer Length field in number of LBs in dout */
cum_lb = 0;
for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
lba = get_unaligned_be64(up + 0);
num = get_unaligned_be32(up + 8);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
my_name, __func__, k, lba, num, sg_off);
if (num == 0)
continue;
ret = check_device_access_params(scp, lba, num);
if (ret)
goto err_out_unlock;
num_by = num * lb_size;
ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
if ((cum_lb + num) > bt_len) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: sum of blocks > data provided\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
0);
ret = illegal_condition_result;
goto err_out_unlock;
}
/* DIX + T10 DIF */
if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
int prot_ret = prot_verify_write(scp, lba, num,
ei_lba);
if (prot_ret) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
prot_ret);
ret = illegal_condition_result;
goto err_out_unlock;
}
}
ret = do_device_access(scp, sg_off, lba, num, true);
if (unlikely(scsi_debug_lbp()))
map_region(lba, num);
if (unlikely(-1 == ret)) {
ret = DID_ERROR << 16;
goto err_out_unlock;
} else if (unlikely(sdebug_verbose && (ret < num_by)))
sdev_printk(KERN_INFO, scp->device,
"%s: write: cdb indicated=%u, IO sent=%d bytes\n",
my_name, num_by, ret);
if (unlikely(sdebug_any_injecting_opt)) {
struct sdebug_queued_cmd *sqcp =
(struct sdebug_queued_cmd *)scp->host_scribble;
if (sqcp) {
if (sqcp->inj_recovered) {
mk_sense_buffer(scp, RECOVERED_ERROR,
THRESHOLD_EXCEEDED, 0);
ret = illegal_condition_result;
goto err_out_unlock;
} else if (sqcp->inj_dif) {
/* Logical block guard check failed */
mk_sense_buffer(scp, ABORTED_COMMAND,
0x10, 1);
ret = illegal_condition_result;
goto err_out_unlock;
} else if (sqcp->inj_dix) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
0x10, 1);
ret = illegal_condition_result;
goto err_out_unlock;
}
}
}
sg_off += num_by;
cum_lb += num;
}
ret = 0;
err_out_unlock:
write_unlock_irqrestore(&atomic_rw, iflags);
err_out:
kfree(lrdp);
return ret;
}
static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u32 ei_lba, bool unmap, bool ndob)
{