diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index d810aa7aee4..1541c174937 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -280,6 +280,8 @@ static int resp_write(struct scsi_cmnd * SCpnt, unsigned long long lba, unsigned int num, struct sdebug_dev_info * devip); static int resp_report_luns(struct scsi_cmnd * SCpnt, struct sdebug_dev_info * devip); +static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, + unsigned int num, struct sdebug_dev_info *devip); static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, int arr_len); static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, @@ -334,6 +336,7 @@ static void get_data_transfer_info(unsigned char *cmd, break; case WRITE_10: case READ_10: + case XDWRITEREAD_10: *lba = cmd[5] + (cmd[4] << 8) + (cmd[3] << 16) + (cmd[2] << 24); *num = cmd[8] + (cmd[7] << 8); break; @@ -542,6 +545,28 @@ int scsi_debug_queuecommand(struct scsi_cmnd * SCpnt, done_funct_t done) case WRITE_BUFFER: errsts = check_readiness(SCpnt, 1, devip); break; + case XDWRITEREAD_10: + if (!scsi_bidi_cmnd(SCpnt)) { + mk_sense_buffer(devip, ILLEGAL_REQUEST, + INVALID_FIELD_IN_CDB, 0); + errsts = check_condition_result; + break; + } + + 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); + if (errsts) + break; + errsts = resp_write(SCpnt, lba, num, devip); + if (errsts) + break; + errsts = resp_xdwriteread(SCpnt, lba, num, devip); + break; default: if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: Opcode: 0x%x not " @@ -1948,6 +1973,50 @@ static int resp_report_luns(struct scsi_cmnd * scp, min((int)alloc_len, SDEBUG_RLUN_ARR_SZ)); } +static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba, + unsigned int num, struct sdebug_dev_info *devip) +{ + int i, j, ret = -1; + unsigned char *kaddr, *buf; + unsigned int offset; + struct scatterlist *sg; + struct scsi_data_buffer *sdb = scsi_in(scp); + + /* better not to use temporary buffer. */ + buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC); + if (!buf) + return ret; + + offset = 0; + scsi_for_each_sg(scp, sg, scsi_sg_count(scp), i) { + kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0); + if (!kaddr) + goto out; + + memcpy(buf + offset, kaddr + sg->offset, sg->length); + offset += sg->length; + kunmap_atomic(kaddr, KM_USER0); + } + + offset = 0; + for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) { + kaddr = (unsigned char *)kmap_atomic(sg_page(sg), KM_USER0); + if (!kaddr) + goto out; + + for (j = 0; j < sg->length; j++) + *(kaddr + sg->offset + j) ^= *(buf + offset + j); + + offset += sg->length; + kunmap_atomic(kaddr, KM_USER0); + } + ret = 0; +out: + kfree(buf); + + return ret; +} + /* When timer goes off this function is called. */ static void timer_intr_handler(unsigned long indx) { @@ -1981,6 +2050,7 @@ static int scsi_debug_slave_alloc(struct scsi_device * sdp) if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %u>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); + set_bit(QUEUE_FLAG_BIDI, &sdp->request_queue->queue_flags); return 0; } |