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, 5 insertions, 1 deletions

diff --git a/src/irmd/config.h.in b/src/irmd/config.h.in
index a3505038..b25053f7 100644
--- a/src/irmd/config.h.in
+++ b/src/irmd/config.h.in
@@ -49,9 +49,10 @@
 #define IRMD_MIN_THREADS        @IRMD_MIN_THREADS@
 #define IRMD_ADD_THREADS        @IRMD_ADD_THREADS@
 
+
 #cmakedefine HAVE_FUSE
 #ifdef HAVE_FUSE
-#define FUSE_PREFIX "@FUSE_PREFIX@"
+#define FUSE_PREFIX             "@FUSE_PREFIX@"
 #endif
 
 #cmakedefine HAVE_TOML
@@ -60,6 +61,9 @@
 #define OUROBOROS_CONFIG_FILE  "@OUROBOROS_CONFIG_FILE@"
 #endif
 
+#define IRMD_PKILL_TIMEOUT      @IRMD_PKILL_TIMEOUT@
+
+#cmakedefine IRMD_KILL_ALL_PROCESSES
 #cmakedefine HAVE_LIBGCRYPT
 
 #define O7S_ASCII_ART                                                          \