iscsi-target: Do not generate REJECTs for zero-length DataOUT
This patch changes iscsit_check_dataout_hdr() to no longer generate
REJECTs for zero-length DataOUTs, and instead simply ignore these
requests.
This follows RFC-3720, Section 10.7.7. DataSegmentLength
"This is the data payload length of a SCSI Data-In or SCSI Data-Out PDU.
The sending of 0 length data segments should be avoided, but initiators
and targets MUST be able to properly receive 0 length data segments."
Reported-by: Santosh Kulkarni <santosh.kulkarni@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index e183352..ab64cbb 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1249,9 +1249,8 @@
int rc;
if (!payload_length) {
- pr_err("DataOUT payload is ZERO, protocol error.\n");
- return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
- buf);
+ pr_warn("DataOUT payload is ZERO, ignoring.\n");
+ return 0;
}
/* iSCSI write */
@@ -1481,7 +1480,7 @@
static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
{
- struct iscsi_cmd *cmd;
+ struct iscsi_cmd *cmd = NULL;
struct iscsi_data *hdr = (struct iscsi_data *)buf;
int rc;
bool data_crc_failed = false;