irmd: Revise IRMd internals

This is a full revision of the IRMd internal implementation.

The registry is now a proper subcomponent managing its own internal
lock (a single mutex). Some tests are added for the registry and its
data structures. Some macros for tests are added in <ouroboros/test.h>.

Flow allocation is now more symmetric between the client side (alloc)
and server size (accept). Each will create a flow in pending state
(ALLOC_PENDING/ACCEPT_PENDING) that is potentially fulfilled by an
IPCP using respond_alloc and respond_accept primitives. Deallocation
is split in flow_dealloc (application side) and ipcp_flow_dealloc
(IPCP side) to get the flow in DEALLOC_PENDING and DEALLOCATED state.

Cleanup of failed flow allocation is now properly handled instead of
relying on the sanitizer thread. The new sanitizer only needs to
monitor crashed processes.

On shutdown, the IRMd will now detect hanging processes and SIGKILL
them and clean up their fuse mountpoints if needed.

A lot of other things have been cleaned up and shuffled around a bit.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 8 insertions, 12 deletions

diff --git a/src/irmd/reg/ipcp.h b/src/irmd/reg/ipcp.h
index 6dfdfb6b..375973a7 100644
--- a/src/irmd/reg/ipcp.h
+++ b/src/irmd/reg/ipcp.h
@@ -24,28 +24,24 @@
 #define OUROBOROS_IRMD_REG_IPCP_H
 
 #include <ouroboros/list.h>
+#include <ouroboros/ipcp.h>
 
 struct reg_ipcp {
         struct list_head next;
 
         struct ipcp_info info;
 
-        pid_t            pid;
-        enum hash_algo   dir_hash_algo;
-        char *           layer;
-
-        enum ipcp_state  state;
-        pthread_cond_t   cond;
-        pthread_mutex_t  mtx;
+        struct layer_info layer;
 };
 
 struct reg_ipcp * reg_ipcp_create(const struct ipcp_info * info);
 
-void              reg_ipcp_destroy(struct reg_ipcp * i);
+void              reg_ipcp_destroy(struct reg_ipcp * ipcp);
 
-void              reg_ipcp_set_state(struct reg_ipcp * i,
-                                     enum ipcp_state   state);
+void              reg_ipcp_update(struct reg_ipcp *        ipcp,
+                                  const struct ipcp_info * info);
 
-int               reg_ipcp_wait_boot(struct reg_ipcp * i);
+void              reg_ipcp_set_layer(struct reg_ipcp *         ipcp,
+                                     const struct layer_info * info);
 
-#endif /* OUROBOROS_IRMD_REG_IPCP_H */
\ No newline at end of file
+#endif /* OUROBOROS_IRMD_REG_IPCP_H */