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[SCSI] scsi_debug: add XDWRITEREAD_10 support 

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Douglas Gilbert <dougg@torque.net>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
FUJITA Tomonori 2008-01-23 01:32:01 +09:00 committed by James Bottomley
parent 072d0bb3ce
commit c639d14e2f
2 changed files with 71 additions and 0 deletions
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70
drivers/scsi/scsi_debug.c
View File

@ -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;
}

1
include/scsi/scsi.h
View File

@ -102,6 +102,7 @@ extern const unsigned char scsi_command_size[8];
#define READ_TOC 0x43
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
#define XDWRITEREAD_10 0x53
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
#define RELEASE_10 0x57