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authorNicholas Bellinger <nab@linux-iscsi.org>2013-11-06 20:55:39 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2013-11-07 12:08:56 -0800
commitdbcbc95cd85854588ac80c0a6d98586fa2129418 (patch)
tree7f8921a0cc0fa357e680ab7d4938bb84afb9d9c1
parent95b60f078899a9680688bab909d02169e1fd632e (diff)
downloadop-kernel-dev-dbcbc95cd85854588ac80c0a6d98586fa2129418.zip
op-kernel-dev-dbcbc95cd85854588ac80c0a6d98586fa2129418.tar.gz
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>
-rw-r--r--drivers/target/iscsi/iscsi_target.c7
1 files changed, 3 insertions, 4 deletions
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 @@ 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;
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