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Commit c639d14e authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by James Bottomley
Browse files

[SCSI] scsi_debug: add XDWRITEREAD_10 support 



Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: default avatarDouglas Gilbert <dougg@torque.net>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 072d0bb3

drivers/scsi/scsi_debug.c

+70 −0
Original line number Diff line number Diff line
@@ -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;

}

include/scsi/scsi.h

+1 −0
Original line number Diff line number Diff line
@@ -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