udev: move NamePolicy to netif-naming-scheme.[ch]

src/shared/netif-naming-scheme.c

@@ -4,6 +4,7 @@
 #include "netif-naming-scheme.h"
 #include "proc-cmdline.h"
 #include "string-util.h"
+#include "string-table.h"
 
 #ifdef _DEFAULT_NET_NAMING_SCHEME_TEST
 /* The primary purpose of this check is to verify that _DEFAULT_NET_NAMING_SCHEME_TEST
@@ -80,3 +81,25 @@ const NamingScheme* naming_scheme(void) {
 
         return cache;
 }
+
+static const char* const name_policy_table[_NAMEPOLICY_MAX] = {
+        [NAMEPOLICY_KERNEL] = "kernel",
+        [NAMEPOLICY_KEEP] = "keep",
+        [NAMEPOLICY_DATABASE] = "database",
+        [NAMEPOLICY_ONBOARD] = "onboard",
+        [NAMEPOLICY_SLOT] = "slot",
+        [NAMEPOLICY_PATH] = "path",
+        [NAMEPOLICY_MAC] = "mac",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
+
+static const char* const alternative_names_policy_table[_NAMEPOLICY_MAX] = {
+        [NAMEPOLICY_DATABASE] = "database",
+        [NAMEPOLICY_ONBOARD] = "onboard",
+        [NAMEPOLICY_SLOT] = "slot",
+        [NAMEPOLICY_PATH] = "path",
+        [NAMEPOLICY_MAC] = "mac",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(alternative_names_policy, NamePolicy);

src/shared/netif-naming-scheme.h

@@ -64,3 +64,21 @@ const NamingScheme* naming_scheme(void);
 static inline bool naming_scheme_has(NamingSchemeFlags flags) {
         return FLAGS_SET(naming_scheme()->flags, flags);
 }
+
+typedef enum NamePolicy {
+        NAMEPOLICY_KERNEL,
+        NAMEPOLICY_KEEP,
+        NAMEPOLICY_DATABASE,
+        NAMEPOLICY_ONBOARD,
+        NAMEPOLICY_SLOT,
+        NAMEPOLICY_PATH,
+        NAMEPOLICY_MAC,
+        _NAMEPOLICY_MAX,
+        _NAMEPOLICY_INVALID = -EINVAL,
+} NamePolicy;
+
+const char *name_policy_to_string(NamePolicy p) _const_;
+NamePolicy name_policy_from_string(const char *p) _pure_;
+
+const char *alternative_names_policy_to_string(NamePolicy p) _const_;
+NamePolicy alternative_names_policy_from_string(const char *p) _pure_;