Reworked proto lists -- each proto is now in two lists: the global one

(proto_list) and per-type one (original lists). A lot of things simplified.

Implemented `disable', `enable' and `restart' CLI commands.

TODO

@@ -28,6 +28,7 @@ Core
 - config: useless rules when protocols disabled
 - config: remove protocol startup priority hacks?
 - config: better datetime format
+- config: avoid upper case in default protocol names
 
 - krt: rescan interfaces when route addition fails?
 - krt: does PERSIST mode have any sense if kernel syncer is shut down as last?
@@ -39,14 +40,11 @@ Core
 
 Commands
 ~~~~~~~~
-shutdown			# order system shutdown
-configure [<file>]
 show	<name>			# show everything you know about symbol <name>
 	rip ??? [<name>]
 	ospf ??? [<name>]
 	static ??? [<name>]
 	symbols
-(disable|enable|restart) <protocol>	# or ALL?
 - showing of routing table as seen by given protocol
 - showing of deleted routing tables and filters
 

doc/reply_codes

@@ -16,6 +16,11 @@ Reply codes of BIRD command-line interface
 0005	Reconfiguration already in progress, queueing
 0006	Reconfiguration ignored, shutting down
 0007	Shutdown ordered
+0008	Already disabled
+0009	Disabled
+0010	Already enabled
+0011	Enabled
+0012	Restarted
 
 1000	BIRD version
 1001	Interface list
@@ -31,6 +36,7 @@ Reply codes of BIRD command-line interface
 8000	Reply too long
 8001	Route not found
 8002	Configuration file error
+8003	No protocols match
 
 9000	Command too long
 9001	Parse error

nest/config.Y

@@ -30,6 +30,7 @@ CF_ENUM(T_ENUM_RTS, RTS_, DUMMY, STATIC, INHERIT, DEVICE, STATIC_DEVICE, REDIREC
 %type <s> optsym
 %type <ra> r_args
 %type <i> echo_mask echo_size
+%type <t> proto_patt
 
 CF_GRAMMAR
 
@@ -287,6 +288,19 @@ echo_size:
    }
  ;
 
+CF_CLI(DISABLE, proto_patt, <protocol> | <pattern> | all, [[Disable protocol]])
+{ proto_xxable($2, 0); } ;
+CF_CLI(ENABLE, proto_patt, <protocol> | <pattern> | all, [[Enable protocol]])
+{ proto_xxable($2, 1); } ;
+CF_CLI(RESTART, proto_patt, <protocol> | <pattern> | all, [[Restart protocol]])
+{ proto_xxable($2, 2); } ;
+
+proto_patt:
+   SYM { $$ = $1->name; }
+ | ALL { $$ = "*"; }
+ | TEXT
+ ;
+
 CF_CODE
 
 CF_END

nest/iface.c

@@ -278,7 +278,7 @@ ifa_notify_change(unsigned c, struct ifa *a)
   struct proto *p;
 
   debug("IFA change notification (%x) for %s:%I\n", c, a->iface->name, a->ip);
-  WALK_LIST(p, proto_list)
+  WALK_LIST(p, active_proto_list)
     if (p->ifa_notify)
       p->ifa_notify(p, c, a);
 }
@@ -307,7 +307,7 @@ if_notify_change(unsigned c, struct iface *i)
 	ifa_notify_change(IF_CHANGE_DOWN, a);
       }
 
-  WALK_LIST(p, proto_list)
+  WALK_LIST(p, active_proto_list)
     if (p->if_notify)
       p->if_notify(p, c, i);
 

nest/proto.c

@@ -15,6 +15,7 @@
 #include "lib/resource.h"
 #include "lib/lists.h"
 #include "lib/event.h"
+#include "lib/string.h"
 #include "conf/conf.h"
 #include "nest/route.h"
 #include "nest/iface.h"
@@ -24,8 +25,15 @@
 static pool *proto_pool;
 
 list protocol_list;
-list proto_list;
+static list proto_list;
 
+#define WALK_PROTO_LIST(p) do {							\
+	node *nn;								\
+	WALK_LIST(nn, proto_list) {						\
+		struct proto *p = SKIP_BACK(struct proto, glob_node, nn);
+#define WALK_PROTO_LIST_END } } while(0)
+
+list active_proto_list;
 static list inactive_proto_list;
 static list initial_proto_list;
 static list flush_proto_list;
@@ -64,7 +72,7 @@ proto_relink(struct proto *p)
   switch (p->core_state)
     {
     case FS_HAPPY:
-      l = &proto_list;
+      l = &active_proto_list;
       break;
     case FS_FLUSHING:
       l = &flush_proto_list;
@@ -153,6 +161,7 @@ protos_preconfig(struct config *c)
   struct protocol *p;
 
   init_list(&proto_list);
+  init_list(&active_proto_list);
   init_list(&inactive_proto_list);
   init_list(&initial_proto_list);
   init_list(&flush_proto_list);
@@ -194,6 +203,7 @@ proto_init(struct proto_config *c)
   q->proto_state = PS_DOWN;
   q->core_state = FS_HUNGRY;
   proto_enqueue(&initial_proto_list, q);
+  add_tail(&proto_list, &q->glob_node);
   /*
    *  HACK ALERT!  In case of multiple kernel routing tables,
    *  the kernel syncer acts as multiple protocols which cooperate
@@ -282,6 +292,7 @@ proto_rethink_goal(struct proto *p)
       DBG("%s has shut down for reconfiguration\n", p->name);
       config_del_obstacle(p->cf->global);
       rem_node(&p->n);
+      rem_node(&p->glob_node);
       mb_free(p);
       if (!nc)
 	return;
@@ -303,8 +314,8 @@ proto_rethink_goal(struct proto *p)
       if (p->core_state == FS_HUNGRY && p->proto_state == PS_DOWN)
 	{
 	  DBG("Kicking %s up\n", p->name);
-	  ASSERT(q->startup_counter > 0);
-	  q->startup_counter--;
+	  if (q->startup_counter > 0)	/* FIXME: Kill the startup counter hack! */
+	    q->startup_counter--;
 	  proto_init_instance(p);
 	  proto_notify_state(p, (q->start ? q->start(p) : PS_UP));
 	}
@@ -326,7 +337,7 @@ protos_dump_all(void)
 
   debug("Protocols:\n");
 
-  WALK_LIST(p, proto_list)
+  WALK_LIST(p, active_proto_list)
     {
       debug("  protocol %s (pri=%d): state %s/%s\n", p->name, p->proto->priority,
 	    p_states[p->proto_state], c_states[p->core_state]);
@@ -343,6 +354,8 @@ protos_dump_all(void)
     debug("  inactive %s: state %s/%s\n", p->name, p_states[p->proto_state], c_states[p->core_state]);
   WALK_LIST(p, initial_proto_list)
     debug("  initial %s\n", p->name);
+  WALK_LIST(p, flush_proto_list)
+    debug("  flushing %s\n", p->name);
 }
 
 void
@@ -514,15 +527,6 @@ proto_do_show(struct proto *p, int verbose)
     }
 }
 
-static void
-proto_do_show_list(list *l, int verbose)
-{
-  struct proto *p;
-
-  WALK_LIST(p, *l)
-    proto_do_show(p, verbose);
-}
-
 void
 proto_show(struct symbol *s, int verbose)
 {
@@ -536,9 +540,9 @@ proto_show(struct symbol *s, int verbose)
     proto_do_show(((struct proto_config *)s->def)->proto, verbose);
   else
     {
-      proto_do_show_list(&proto_list, verbose);
-      proto_do_show_list(&flush_proto_list, verbose);
-      proto_do_show_list(&inactive_proto_list, verbose);
+      WALK_PROTO_LIST(p)
+	proto_do_show(p, verbose);
+      WALK_PROTO_LIST_END;
     }
   cli_msg(0, "");
 }
@@ -559,7 +563,7 @@ proto_get_named(struct symbol *sym, struct protocol *pr)
   else
     {
       p = NULL;
-      WALK_LIST(q, proto_list)
+      WALK_LIST(q, active_proto_list)
 	if (q->proto == pr)
 	  {
 	    if (p)
@@ -571,3 +575,54 @@ proto_get_named(struct symbol *sym, struct protocol *pr)
     }
   return p;
 }
+
+void
+proto_xxable(char *pattern, int xx)
+{
+  int cnt = 0;
+  WALK_PROTO_LIST(p)
+    if (patmatch(pattern, p->name))
+      {
+	cnt++;
+	switch (xx)
+	  {
+	  case 0:
+	    if (p->disabled)
+	      cli_msg(-8, "%s: already disabled", p->name);
+	    else
+	      {
+		cli_msg(-9, "%s: disabled", p->name);
+		p->disabled = 1;
+	      }
+	    break;
+	  case 1:
+	    if (!p->disabled)
+	      cli_msg(-10, "%s: already enabled", p->name);
+	    else
+	      {
+		cli_msg(-11, "%s: enabled", p->name);
+		p->disabled = 0;
+	      }
+	    break;
+	  case 2:
+	    if (p->disabled)
+	      cli_msg(-8, "%s: already disabled", p->name);
+	    else
+	      {
+		p->disabled = 1;
+		proto_rethink_goal(p);
+		p->disabled = 0;
+		cli_msg(-12, "%s: restarted", p->name);
+	      }
+	    break;
+	  default:
+	    ASSERT(0);
+	  }
+	proto_rethink_goal(p);
+      }
+  WALK_PROTO_LIST_END;
+  if (!cnt)
+    cli_msg(8003, "No protocols match");
+  else
+    cli_msg(0, "");
+}

nest/protocol.h

@@ -87,7 +87,8 @@ struct proto_config {
 };
 
 struct proto {
-  node n;
+  node n;				/* Node in *_proto_list */
+  node glob_node;			/* Node in global proto_list */
   struct protocol *proto;		/* Protocol */
   struct proto_config *cf;		/* Configuration data */
   struct proto_config *cf_new;		/* Configuration we want to switch to after shutdown (NULL=delete) */
@@ -151,10 +152,12 @@ struct proto {
 void proto_build(struct proto_config *);
 void *proto_new(struct proto_config *, unsigned size);
 void *proto_config_new(struct protocol *, unsigned size);
+
 void proto_show(struct symbol *, int);
 struct proto *proto_get_named(struct symbol *, struct protocol *);
+void proto_xxable(char *, int);
 
-extern list proto_list;
+extern list active_proto_list;
 
 /*
  *  Each protocol instance runs two different state machines: