From dbcbc95cd85854588ac80c0a6d98586fa2129418 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 6 Nov 2013 20:55:39 -0800 Subject: 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 Signed-off-by: Nicholas Bellinger --- drivers/target/iscsi/iscsi_target.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index e183352a0645..ab64cbbb4976 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1249,9 +1249,8 @@ iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, 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 @@ EXPORT_SYMBOL(iscsit_check_dataout_payload); 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; -- cgit v1.2.3