[SERVER] iscsi: Restore proper padding of DataSegment

This broke when sending ds payload was refactored to avoid copying the
buffer into the PDU's buffer before sending. iscsi_connection_pdu_create
took care of this before, but now that we send the source buffer
directly, pad the packet manually after sending the buffer contents if
required.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/server/iscsi.c b/src/server/iscsi.c
index 26c19eb..c1fc01f 100644
--- a/src/server/iscsi.c
+++ b/src/server/iscsi.c
@@ -448,6 +448,13 @@ static uint32_t iscsi_scsi_data_in_send(iscsi_connection *conn, iscsi_task *task
 			// Set error
 			return data_sn;
 		}
+		if ( len % ISCSI_ALIGN_SIZE != 0 ) {
+			const size_t padding = ISCSI_ALIGN_SIZE - (len % ISCSI_ALIGN_SIZE);
+			if ( !sock_sendPadding( conn->client->sock, padding ) ) {
+				// Set error
+				return data_sn;
+			}
+		}
 	} else {
 		const off_t off = task->scsi_task.file_offset + pos;
 		size_t padding = 0;