Make foo_validate() functions call config_validate().

The former foo_validate() functions are now toplevel
legacy_validate_fn callbacks.  The new foo_validate() functions now
call them.

This change lets us remove the old shared_random disk state
validation callback entirely.

scripts/maint/practracker/exceptions.txt

@@ -38,7 +38,7 @@ problem include-count /src/app/config/config.c 89
 problem function-size /src/app/config/config.c:options_act_reversible() 296
 problem function-size /src/app/config/config.c:options_act() 589
 problem function-size /src/app/config/config.c:resolve_my_address() 190
-problem function-size /src/app/config/config.c:options_validate() 1209
+problem function-size /src/app/config/config.c:options_validate_cb() 1209
 problem function-size /src/app/config/config.c:options_init_from_torrc() 207
 problem function-size /src/app/config/config.c:options_init_from_string() 113
 problem function-size /src/app/config/config.c:options_init_logs() 145

src/app/config/config.c

@@ -3239,13 +3239,20 @@ compute_publishserverdescriptor(or_options_t *options)
  * */
 #define RECOMMENDED_MIN_CIRCUIT_BUILD_TIMEOUT (10)
 
-static int
-options_validate_cb(const void *old_options, void *options, char **msg)
+/**
+ * Return 0 if every setting in <b>options</b> is reasonable, is a
+ * permissible transition from <b>old_options</b>, and none of the
+ * testing-only settings differ from <b>default_options</b> unless in
+ * testing mode.  Else return -1.  Should have no side effects, except for
+ * normalizing the contents of <b>options</b>.
+ *
+ * On error, tor_strdup an error explanation into *<b>msg</b>.
+ */
+STATIC int
+options_validate(const or_options_t *old_options, or_options_t *options,
+                 char **msg)
 {
-  in_option_validation = 1;
-  int rv = options_validate(old_options, options, msg);
-  in_option_validation = 0;
-  return rv;
+  return config_validate(get_options_mgr(), old_options, options, msg);
 }
 
 #define REJECT(arg) \
@@ -3431,18 +3438,16 @@ options_validate_single_onion(or_options_t *options, char **msg)
   return 0;
 }
 
-/** Return 0 if every setting in <b>options</b> is reasonable, is a
- * permissible transition from <b>old_options</b>, and none of the
- * testing-only settings differ from <b>default_options</b> unless in
- * testing mode.  Else return -1.  Should have no side effects, except for
- * normalizing the contents of <b>options</b>.
- *
- * On error, tor_strdup an error explanation into *<b>msg</b>.
+/**
+ * Legacy validation/normalization callback for or_options_t.  See
+ * legacy_validate_fn_t for more information.
  */
-STATIC int
-options_validate(const or_options_t *old_options, or_options_t *options,
-                 char **msg)
+static int
+options_validate_cb(const void *old_options_, void *options_, char **msg)
 {
+  const or_options_t *old_options = old_options_;
+  or_options_t *options = options_;
+
   config_line_t *cl;
   const char *uname = get_uname();
   int n_ports=0;

src/app/config/statefile.c

@@ -265,16 +265,6 @@ validate_transports_in_state(or_state_t *state)
   return 0;
 }
 
-static int
-or_state_validate_cb(const void *old_state, void *state, char **msg)
-{
-  /* We don't use these; only options do. Still, we need to match that
-   * signature. */
-  (void) old_state;
-
-  return or_state_validate(state, msg);
-}
-
 /** Return 0 if every setting in <b>state</b> is reasonable, and a
  * permissible transition from <b>old_state</b>.  Else warn and return -1.
  * Should have no side effects, except for normalizing the contents of
@@ -283,6 +273,22 @@ or_state_validate_cb(const void *old_state, void *state, char **msg)
 static int
 or_state_validate(or_state_t *state, char **msg)
 {
+  return config_validate(get_state_mgr(), NULL, state, msg);
+}
+
+/**
+ * Legacy validation/normalization callback for or_state_t.  See
+ * legacy_validate_fn_t for more information.
+ */
+static int
+or_state_validate_cb(const void *old_state, void *state_, char **msg)
+{
+  /* There is not a meaningful concept of a state-to-state transition,
+   * since we do not reload the state after we start. */
+  (void) old_state;
+
+  or_state_t *state = state_;
+
   if (entry_guards_parse_state(state, 0, msg)<0)
     return -1;
 

src/feature/dirauth/shared_random_state.c

@@ -59,9 +59,6 @@ DUMMY_TYPECHECK_INSTANCE(sr_disk_state_t);
 /** Our persistent state magic number. */
 #define SR_DISK_STATE_MAGIC 0x98AB1254
 
-static int
-disk_state_validate_cb(const void *old_state, void *state, char **msg);
-
 /** Array of variables that are saved to disk as a persistent state. */
 static const config_var_t state_vars[] = {
   V(Version,                    POSINT, "0"),
@@ -94,7 +91,6 @@ static const config_format_t state_format = {
    offsetof(sr_disk_state_t, magic_),
   },
   .vars = state_vars,
-  .legacy_validate_fn = disk_state_validate_cb,
   .extra = &state_extra_var,
   .config_suite_offset = -1,
 };
@@ -339,21 +335,6 @@ disk_state_validate(const sr_disk_state_t *state)
   return -1;
 }
 
-/** Validate the disk state (NOP for now). */
-static int
-disk_state_validate_cb(const void *old_state, void *state, char **msg)
-{
-  /* We don't use these; only options do. */
-  (void) old_state;
-
-  /* This is called by config_dump which is just before we are about to
-   * write it to disk. At that point, our global memory state has been
-   * copied to the disk state so it's fair to assume it's trustable. */
-  (void) state;
-  (void) msg;
-  return 0;
-}
-
 /** Parse the Commit line(s) in the disk state and translate them to the
  * the memory state. Return 0 on success else -1 on error. */
 static int

src/lib/confmgt/confparse.c

@@ -1239,7 +1239,7 @@ config_dump(const config_mgr_t *mgr, const void *default_options,
 
   /* XXX use a 1 here so we don't add a new log line while dumping */
   if (default_options == NULL) {
-    if (fmt->legacy_validate_fn(NULL, defaults_tmp, &msg) < 0) {
+    if (config_validate(mgr, NULL, defaults_tmp, &msg) < 0) {
       // LCOV_EXCL_START
       log_err(LD_BUG, "Failed to validate default config: %s", msg);
       tor_free(msg);