mpls: Move reserved label definitions

Move to include/uapi/linux/mpls.h to be externally visibile.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/mpls.h

@@ -31,4 +31,14 @@ struct mpls_label {
 #define MPLS_LS_TTL_MASK        0x000000FF
 #define MPLS_LS_TTL_SHIFT       0
 
+/* Reserved labels */
+#define MPLS_LABEL_IPV4_EXPLICIT_NULL	0 /* RFC3032 */
+#define MPLS_LABEL_ROUTER_ALERT		1 /* RFC3032 */
+#define MPLS_LABEL_IPV6_EXPLICIT_NULL	2 /* RFC3032 */
+#define MPLS_LABEL_IMPLICIT_NULL	3 /* RFC3032 */
+#define MPLS_LABEL_ENTROPY_INDICATOR	7 /* RFC6790 */
+#define MPLS_LABEL_GAL			13 /* RFC5586 */
+#define MPLS_LABEL_OAM_ALERT		14 /* RFC3429 */
+#define MPLS_LABEL_EXTENSION		15 /* RFC7274 */
+
 #endif /* _UAPI_MPLS_H */

net/mpls/af_mpls.c

@@ -647,7 +647,7 @@ int nla_get_labels(const struct nlattr *nla,
 			return -EINVAL;
 
 		switch (dec.label) {
-		case LABEL_IMPLICIT_NULL:
+		case MPLS_LABEL_IMPLICIT_NULL:
 			/* RFC3032: This is a label that an LSR may
 			 * assign and distribute, but which never
 			 * actually appears in the encapsulation.
@@ -935,7 +935,7 @@ static int resize_platform_label_table(struct net *net, size_t limit)
 	}
 
 	/* In case the predefined labels need to be populated */
-	if (limit > LABEL_IPV4_EXPLICIT_NULL) {
+	if (limit > MPLS_LABEL_IPV4_EXPLICIT_NULL) {
 		struct net_device *lo = net->loopback_dev;
 		rt0 = mpls_rt_alloc(lo->addr_len);
 		if (!rt0)
@@ -945,7 +945,7 @@ static int resize_platform_label_table(struct net *net, size_t limit)
 		rt0->rt_via_table = NEIGH_LINK_TABLE;
 		memcpy(rt0->rt_via, lo->dev_addr, lo->addr_len);
 	}
-	if (limit > LABEL_IPV6_EXPLICIT_NULL) {
+	if (limit > MPLS_LABEL_IPV6_EXPLICIT_NULL) {
 		struct net_device *lo = net->loopback_dev;
 		rt2 = mpls_rt_alloc(lo->addr_len);
 		if (!rt2)
@@ -973,15 +973,15 @@ static int resize_platform_label_table(struct net *net, size_t limit)
 	memcpy(labels, old, cp_size);
 
 	/* If needed set the predefined labels */
-	if ((old_limit <= LABEL_IPV6_EXPLICIT_NULL) &&
-	    (limit > LABEL_IPV6_EXPLICIT_NULL)) {
-		RCU_INIT_POINTER(labels[LABEL_IPV6_EXPLICIT_NULL], rt2);
+	if ((old_limit <= MPLS_LABEL_IPV6_EXPLICIT_NULL) &&
+	    (limit > MPLS_LABEL_IPV6_EXPLICIT_NULL)) {
+		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV6_EXPLICIT_NULL], rt2);
 		rt2 = NULL;
 	}
 
-	if ((old_limit <= LABEL_IPV4_EXPLICIT_NULL) &&
-	    (limit > LABEL_IPV4_EXPLICIT_NULL)) {
-		RCU_INIT_POINTER(labels[LABEL_IPV4_EXPLICIT_NULL], rt0);
+	if ((old_limit <= MPLS_LABEL_IPV4_EXPLICIT_NULL) &&
+	    (limit > MPLS_LABEL_IPV4_EXPLICIT_NULL)) {
+		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV4_EXPLICIT_NULL], rt0);
 		rt0 = NULL;
 	}
 

net/mpls/internal.h

 #ifndef MPLS_INTERNAL_H
 #define MPLS_INTERNAL_H
 
-#define LABEL_IPV4_EXPLICIT_NULL	0 /* RFC3032 */
-#define LABEL_ROUTER_ALERT_LABEL	1 /* RFC3032 */
-#define LABEL_IPV6_EXPLICIT_NULL	2 /* RFC3032 */
-#define LABEL_IMPLICIT_NULL		3 /* RFC3032 */
-#define LABEL_ENTROPY_INDICATOR		7 /* RFC6790 */
-#define LABEL_GAL			13 /* RFC5586 */
-#define LABEL_OAM_ALERT			14 /* RFC3429 */
-#define LABEL_EXTENSION			15 /* RFC7274 */
-
-
 struct mpls_shim_hdr {
 	__be32 label_stack_entry;
 };