Sockets: Unified API for main and other loops

Now sk_open() requires an explicit IO loop to open the socket in. Also
specific functions for socket RX pause / resume are added to allow for
BGP corking.

And last but not least, socket reloop is now synchronous to resolve
weird cases of the target loop stopping before actually picking up the
relooped socket. Now the caller must ensure that both loops are locked
while relooping, and this way all sockets always have their respective
loop.

1 files changed, 5 insertions, 4 deletions

diff --git a/sysdep/unix/io-loop.h b/sysdep/unix/io-loop.h
index e606f07e..7ec903af 100644
--- a/sysdep/unix/io-loop.h
+++ b/sysdep/unix/io-loop.h
@@ -22,6 +22,7 @@ struct pfd {
 };
 
 void sockets_prepare(struct birdloop *, struct pfd *);
+void socket_changed(struct birdsock *);
 
 void pipe_new(struct pipe *);
 void pipe_pollin(struct pipe *, struct pfd *);
@@ -40,12 +41,12 @@ struct birdloop
   struct timeloop time;
   event_list event_list;
   list sock_list;
+  struct birdsock *sock_active;
   int sock_num;
+  uint sock_changed;
 
   uint ping_pending;
 
-  uint links;
-
   _Atomic u32 thread_transition;
 #define LTT_PING  1
 #define LTT_MOVE  2
@@ -66,8 +67,6 @@ struct bird_thread
 {
   node n;
 
-  _Atomic u32 poll_changed;
-
   struct pipe wakeup;
   event_list priority_events;
 
@@ -83,6 +82,8 @@ struct bird_thread
   struct pfd *pfd;
 
   event cleanup_event;
+
+  int sock_changed;
 };
 
 #endif