SPC4r37 6.4.1 EXTENDED COPY(LID4) states (also applying to LID1 reqs):
A parameter list length of zero specifies that the copy manager shall
not transfer any data or alter any internal state, and this shall not
be considered an error.
This behaviour can be tested using the libiscsi ExtendedCopy.ParamHdr
test.
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
drivers/target/target_core_xcopy.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c
index 93f0dcc..ee6013c 100644
--- a/drivers/target/target_core_xcopy.c
+++ b/drivers/target/target_core_xcopy.c
@@ -889,6 +889,10 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd)
return TCM_UNSUPPORTED_SCSI_OPCODE;
}
+ if (se_cmd->data_length == 0) {
+ target_complete_cmd(se_cmd, SAM_STAT_GOOD);
+ return TCM_NO_SENSE;
+ }
if (se_cmd->data_length < XCOPY_HDR_LEN) {
pr_err("XCOPY parameter truncation: length %u < hdr_len %u\n",
se_cmd->data_length, XCOPY_HDR_LEN);
--
2.10.2
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