[stgt] [PATCH 0/6] iser new implementation

FUJITA Tomonori fujita.tomonori at lab.ntt.co.jp
Tue Feb 1 01:30:24 CET 2011

On Mon, 31 Jan 2011 17:14:18 -0500
Pete Wyckoff <pw at padd.com> wrote:

> The XDREADWRITE_10 command is also bidi.  This might be easier
> to hack into the disk target if it is not already there.  See
> the implementation in linux scsi_debug.c if it is helpful.

I've attached a patch to add fake XDREADWRITE_10 support.

You can use my makeshift bsg tool to send a XDREADWRITE_10 command:


vine:/home/fujita# ./sgv4-tools/sgv4_xdwriteread /sys/class/bsg/2\:0\:0\:1
driver:0, transport:0, device:0, din_resid: 0, dout_resid: 0

diff --git a/usr/sbc.c b/usr/sbc.c
index d73306b..6f59dc1 100644
--- a/usr/sbc.c
+++ b/usr/sbc.c
@@ -268,6 +268,11 @@ sense:
+static int sbc_xdwriteread(int host_no, struct scsi_cmd *cmd)
+	return SAM_STAT_GOOD;
 static int sbc_lu_init(struct scsi_lu *lu)
 	uint64_t size;
@@ -403,7 +408,7 @@ static struct device_type_template sbc_template = {
-		{spc_illegal_op,},
+		{sbc_xdwriteread,},
 		{sbc_mode_select, NULL, PR_WE_FA|PR_EA_FA|PR_WE_FN|PR_EA_FN},
diff --git a/usr/scsi.h b/usr/scsi.h
index f4d8c11..b4724f0 100644
--- a/usr/scsi.h
+++ b/usr/scsi.h
@@ -63,6 +63,7 @@
 #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
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