mpls: Change reserved label names to be consistent with netbsd

Since these are now visible to userspace it is nice to be consistent
with BSD (sys/netmpls/mpls.h in netBSD).
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/uapi/linux/mpls.h

@@ -32,13 +32,13 @@ struct mpls_label {
 #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_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_OAM_ALERT		14 /* RFC3429 */
+#define MPLS_LABEL_OAMALERT		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 MPLS_LABEL_IMPLICIT_NULL:
+		case MPLS_LABEL_IMPLNULL:
 			/* 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 > MPLS_LABEL_IPV4_EXPLICIT_NULL) {
+	if (limit > MPLS_LABEL_IPV4NULL) {
 		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 > MPLS_LABEL_IPV6_EXPLICIT_NULL) {
+	if (limit > MPLS_LABEL_IPV6NULL) {
 		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 <= MPLS_LABEL_IPV6_EXPLICIT_NULL) &&
-	    (limit > MPLS_LABEL_IPV6_EXPLICIT_NULL)) {
-		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV6_EXPLICIT_NULL], rt2);
+	if ((old_limit <= MPLS_LABEL_IPV6NULL) &&
+	    (limit > MPLS_LABEL_IPV6NULL)) {
+		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV6NULL], rt2);
 		rt2 = NULL;
 	}
 
-	if ((old_limit <= MPLS_LABEL_IPV4_EXPLICIT_NULL) &&
-	    (limit > MPLS_LABEL_IPV4_EXPLICIT_NULL)) {
-		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV4_EXPLICIT_NULL], rt0);
+	if ((old_limit <= MPLS_LABEL_IPV4NULL) &&
+	    (limit > MPLS_LABEL_IPV4NULL)) {
+		RCU_INIT_POINTER(labels[MPLS_LABEL_IPV4NULL], rt0);
 		rt0 = NULL;
 	}