From 87156518da94a696f2b27ab8945d531af2f1d339 Mon Sep 17 00:00:00 2001 From: David Disseldorp Date: Mon, 2 Jan 2017 18:04:09 +0100 Subject: [PATCH] target: support XCOPY requests without parameters 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 Reviewed-by: Christoph Hellwig Signed-off-by: Bart Van Assche --- 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 a9a6462c66d1..d828b3b5000b 100644 --- a/drivers/target/target_core_xcopy.c +++ b/drivers/target/target_core_xcopy.c @@ -888,6 +888,10 @@ 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); -- 2.39.5