Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / uapi / linux / mpls.h

diff --git a/kernel/include/uapi/linux/mpls.h b/kernel/include/uapi/linux/mpls.h
new file mode 100644 (file)
index 0000000..139d4dd
--- /dev/null
+++ b/kernel/include/uapi/linux/mpls.h
@@ -0,0 +1,44 @@
+#ifndef _UAPI_MPLS_H
+#define _UAPI_MPLS_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+/* Reference: RFC 5462, RFC 3032
+ *
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                Label                  | TC  |S|       TTL     |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *     Label:  Label Value, 20 bits
+ *     TC:     Traffic Class field, 3 bits
+ *     S:      Bottom of Stack, 1 bit
+ *     TTL:    Time to Live, 8 bits
+ */
+
+struct mpls_label {
+       __be32 entry;
+};
+
+#define MPLS_LS_LABEL_MASK      0xFFFFF000
+#define MPLS_LS_LABEL_SHIFT     12
+#define MPLS_LS_TC_MASK         0x00000E00
+#define MPLS_LS_TC_SHIFT        9
+#define MPLS_LS_S_MASK          0x00000100
+#define MPLS_LS_S_SHIFT         8
+#define MPLS_LS_TTL_MASK        0x000000FF
+#define MPLS_LS_TTL_SHIFT       0
+
+/* Reserved labels */
+#define MPLS_LABEL_IPV4NULL            0 /* RFC3032 */
+#define MPLS_LABEL_RTALERT             1 /* RFC3032 */
+#define MPLS_LABEL_IPV6NULL            2 /* RFC3032 */
+#define MPLS_LABEL_IMPLNULL            3 /* RFC3032 */
+#define MPLS_LABEL_ENTROPY             7 /* RFC6790 */
+#define MPLS_LABEL_GAL                 13 /* RFC5586 */
+#define MPLS_LABEL_OAMALERT            14 /* RFC3429 */
+#define MPLS_LABEL_EXTENSION           15 /* RFC7274 */
+
+#endif /* _UAPI_MPLS_H */