machine: enum AcquireMetadata

src/machine/machine.c

@@ -967,3 +967,11 @@ static const char* const kill_whom_table[_KILL_WHOM_MAX] = {
 };
 
 DEFINE_STRING_TABLE_LOOKUP(kill_whom, KillWhom);
+
+static const char* const acquire_metadata_table[_ACQUIRE_METADATA_MAX] = {
+        [ACQUIRE_METADATA_NO]       = "no",
+        [ACQUIRE_METADATA_YES]      = "yes",
+        [ACQUIRE_METADATA_GRACEFUL] = "graceful"
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(acquire_metadata, AcquireMetadata, ACQUIRE_METADATA_YES);

src/machine/machine.h

@@ -110,3 +110,17 @@ int machine_owns_gid(Machine *m, gid_t host_gid, gid_t *ret_internal_gid);
 
 int machine_translate_uid(Machine *m, uid_t internal_uid, uid_t *ret_host_uid);
 int machine_translate_gid(Machine *m, gid_t internal_gid, gid_t *ret_host_gid);
+
+typedef enum AcquireMetadata {
+        ACQUIRE_METADATA_NO,
+        ACQUIRE_METADATA_YES,
+        ACQUIRE_METADATA_GRACEFUL,
+        _ACQUIRE_METADATA_MAX,
+        _ACQUIRE_METADATA_INVALID = -EINVAL,
+} AcquireMetadata;
+
+AcquireMetadata acquire_metadata_from_string(const char *s) _pure_;
+const char* acquire_metadata_to_string(AcquireMetadata am) _const_;
+inline static bool should_acquire_metadata(AcquireMetadata am) {
+        return am == ACQUIRE_METADATA_YES || am == ACQUIRE_METADATA_GRACEFUL;
+}

src/machine/machined-varlink.c

@@ -432,6 +432,8 @@ static void machine_lookup_parameters_done(MachineLookupParameters *p) {
         pidref_done(&p->pidref);
 }
 
+static JSON_DISPATCH_ENUM_DEFINE(json_dispatch_acquire_metadata, AcquireMetadata, acquire_metadata_from_string);
+
 static int vl_method_list(sd_varlink *link, sd_json_variant *parameters, sd_varlink_method_flags_t flags, void *userdata) {
         static const sd_json_dispatch_field dispatch_table[] = {
                 VARLINK_DISPATCH_MACHINE_LOOKUP_FIELDS(MachineLookupParameters),