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 <[email protected]>
Signed-off-by: Sander Vrijders <[email protected]>

1 files changed, 0 insertions, 47 deletions

diff --git a/src/irmd/utils.h b/src/irmd/utils.h
deleted file mode 100644
index 698028ee..00000000
--- a/src/irmd/utils.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2024
- *
- * Utils of the IPC Resource Manager
- *
- *    Dimitri Staessens <[email protected]>
- *    Sander Vrijders   <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#ifndef OUROBOROS_IRMD_UTILS_H
-#define OUROBOROS_IRMD_UTILS_H
-
-#include <ouroboros/list.h>
-
-#include <sys/types.h>
-
-struct str_el {
-        struct list_head next;
-        char *           str;
-};
-
-struct pid_el {
-        struct list_head next;
-        pid_t            pid;
-};
-
-/* functions for copying and destroying arguments list */
-size_t  argvlen(char ** argv);
-
-char ** argvdup(char ** argv);
-
-void    argvfree(char ** argv);
-
-#endif /* OUROBOROS_IRM_UTILS_H */