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