-static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
- unsigned int num, struct sdebug_dev_info *devip)
-{
- int j;
- unsigned char *kaddr, *buf;
- unsigned int offset;
- struct scsi_data_buffer *sdb = scsi_in(scp);
- struct sg_mapping_iter miter;
-
- /* better not to use temporary buffer. */
- buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
- if (!buf) {
- mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
- INSUFF_RES_ASCQ);
- return check_condition_result;
- }
-
- scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
-
- offset = 0;
- sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
- SG_MITER_ATOMIC | SG_MITER_TO_SG);
-
- while (sg_miter_next(&miter)) {
- kaddr = miter.addr;
- for (j = 0; j < miter.length; j++)
- *(kaddr + j) ^= *(buf + offset + j);
-
- offset += miter.length;
- }
- sg_miter_stop(&miter);
- kfree(buf);
-
- return 0;
-}
-
-static int resp_xdwriteread_10(struct scsi_cmnd *scp,
- struct sdebug_dev_info *devip)
-{
- u8 *cmd = scp->cmnd;
- u64 lba;
- u32 num;
- int errsts;
-
- if (!scsi_bidi_cmnd(scp)) {
- mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
- INSUFF_RES_ASCQ);
- return check_condition_result;
- }
- errsts = resp_read_dt0(scp, devip);
- if (errsts)
- return errsts;
- if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
- errsts = resp_write_dt0(scp, devip);
- if (errsts)
- return errsts;
- }
- lba = get_unaligned_be32(cmd + 2);
- num = get_unaligned_be16(cmd + 7);
- return resp_xdwriteread(scp, lba, num, devip);
-}
-