prop224: Add a init/free_all function for the whole subsystem

Introduces hs_init() located in hs_common.c which initialize the entire HS v3
subsystem. This is done _prior_ to the options being loaded because we need to
allocate global data structure before we load the configuration.

The hs_free_all() is added to release everything from tor_free_all().

Note that both functions do NOT handle v2 service subsystem but does handle
the common interface that both v2 and v3 needs such as the cache and
circuitmap.

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/hs_common.c

@@ -15,7 +15,9 @@
 
 #include "config.h"
 #include "networkstatus.h"
+#include "hs_cache.h"
 #include "hs_common.h"
+#include "hs_service.h"
 #include "rendcommon.h"
 
 /* Make sure that the directory for <b>service</b> is private, using the config
@@ -344,3 +346,23 @@ rend_data_get_pk_digest(const rend_data_t *rend_data, size_t *len_out)
   }
 }
 
+/* Initialize the entire HS subsytem. This is called in tor_init() before any
+ * torrc options are loaded. Only for >= v3. */
+void
+hs_init(void)
+{
+  hs_circuitmap_init();
+  hs_service_init();
+  hs_cache_init();
+}
+
+/* Release and cleanup all memory of the HS subsystem (all version). This is
+ * called by tor_free_all(). */
+void
+hs_free_all(void)
+{
+  hs_circuitmap_free_all();
+  hs_service_free_all();
+  hs_cache_free_all();
+}
+

src/or/hs_common.h

@@ -58,6 +58,9 @@ typedef enum {
   HS_AUTH_KEY_TYPE_ED25519 = 2,
 } hs_auth_key_type_t;
 
+void hs_init(void);
+void hs_free_all(void);
+
 int hs_check_service_private_dir(const char *username, const char *path,
                                  unsigned int dir_group_readable,
                                  unsigned int create);

src/or/hs_service.c

@@ -97,6 +97,13 @@ hs_service_free(hs_service_t *service)
   tor_free(service);
 }
 
+/* Initialize the service HS subsystem. */
+void
+hs_service_init(void)
+{
+  return;
+}
+
 /* Release all global the storage of hidden service subsystem. */
 void
 hs_service_free_all(void)

src/or/hs_service.h

@@ -193,6 +193,7 @@ typedef struct hs_service_t {
 /* API */
 
 int hs_service_config_all(const or_options_t *options, int validate_only);
+void hs_service_init(void);
 void hs_service_free_all(void);
 
 void hs_service_free(hs_service_t *service);

src/or/main.c

@@ -2499,9 +2499,6 @@ do_main_loop(void)
     }
   }
 
-  /* Initialize relay-side HS circuitmap */
-  hs_circuitmap_init();
-
   /* set up once-a-second callback. */
   if (! second_timer) {
     struct timeval one_second;
@@ -3014,9 +3011,10 @@ tor_init(int argc, char *argv[])
   rep_hist_init();
   /* Initialize the service cache. */
   rend_cache_init();
-  hs_cache_init();
   addressmap_init(); /* Init the client dns cache. Do it always, since it's
                       * cheap. */
+  /* Initialize the HS subsystem. */
+  hs_init();
 
   {
   /* We search for the "quiet" option first, since it decides whether we
@@ -3216,10 +3214,8 @@ tor_free_all(int postfork)
   networkstatus_free_all();
   addressmap_free_all();
   dirserv_free_all();
-  hs_service_free_all();
   rend_cache_free_all();
   rend_service_authorization_free_all();
-  hs_cache_free_all();
   rep_hist_free_all();
   dns_free_all();
   clear_pending_onions();
@@ -3232,7 +3228,6 @@ tor_free_all(int postfork)
   connection_edge_free_all();
   scheduler_free_all();
   nodelist_free_all();
-  hs_circuitmap_free_all();
   microdesc_free_all();
   routerparse_free_all();
   ext_orport_free_all();
@@ -3241,6 +3236,7 @@ tor_free_all(int postfork)
   protover_free_all();
   bridges_free_all();
   consdiffmgr_free_all();
+  hs_free_all();
   if (!postfork) {
     config_free_all();
     or_state_free_all();