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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-07 08:55:39 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-08 00:08:56 +0400 |
| commit | dbcbc95cd85854588ac80c0a6d98586fa2129418 (patch) | |
| tree | 7f8921a0cc0fa357e680ab7d4938bb84afb9d9c1 | |
| parent | 95b60f078899a9680688bab909d02169e1fd632e (diff) | |
| download | linux-dbcbc95cd85854588ac80c0a6d98586fa2129418.tar.xz | |
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.c | 7 |
1 files changed, 3 insertions, 4 deletions
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; |