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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>
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1 changed files with 3 additions and 4 deletions
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@ -1249,9 +1249,8 @@ iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf,
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int rc;
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if (!payload_length) {
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pr_err("DataOUT payload is ZERO, protocol error.\n");
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return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
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buf);
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pr_warn("DataOUT payload is ZERO, ignoring.\n");
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return 0;
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}
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/* iSCSI write */
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@ -1481,7 +1480,7 @@ EXPORT_SYMBOL(iscsit_check_dataout_payload);
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static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
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{
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struct iscsi_cmd *cmd;
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struct iscsi_cmd *cmd = NULL;
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struct iscsi_data *hdr = (struct iscsi_data *)buf;
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int rc;
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bool data_crc_failed = false;
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