Introduce an in-kernel test module to validate the core logic of the
Live Update Orchestrator's File-Lifecycle-Bound feature. This
provides a low-level, controlled environment to test FLB registration
and callback invocation without requiring userspace interaction or
actual kexec reboots.

The test is enabled by the CONFIG_LIVEUPDATE_TEST Kconfig option.

Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
---
 include/linux/liveupdate/abi/luo.h |   5 +
 kernel/liveupdate/luo_file.c       |   2 +
 kernel/liveupdate/luo_internal.h   |   6 ++
 lib/Kconfig.debug                  |  23 +++++
 lib/tests/Makefile                 |   1 +
 lib/tests/liveupdate.c             | 143 +++++++++++++++++++++++++++++
 6 files changed, 180 insertions(+)
 create mode 100644 lib/tests/liveupdate.c

diff --git a/include/linux/liveupdate/abi/luo.h b/include/linux/liveupdate/abi/luo.h
index 85596ce68c16..cdcace9b48f5 100644
--- a/include/linux/liveupdate/abi/luo.h
+++ b/include/linux/liveupdate/abi/luo.h

@@ -230,4 +230,9 @@ struct luo_flb_ser {
 	u64 count;
 } __packed;
 
+/* Kernel Live Update Test ABI */
+#ifdef CONFIG_LIVEUPDATE_TEST
+#define LIVEUPDATE_TEST_FLB_COMPATIBLE(i)	"liveupdate-test-flb-v" #i
+#endif
+
 #endif /* _LINUX_LIVEUPDATE_ABI_LUO_H */

diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c
index df337c9c4f21..9a531096bdb5 100644
--- a/kernel/liveupdate/luo_file.c
+++ b/kernel/liveupdate/luo_file.c

@@ -834,6 +834,8 @@ int liveupdate_register_file_handler(struct liveupdate_file_handler *fh)
 	INIT_LIST_HEAD(&fh->flb_list);
 	list_add_tail(&fh->list, &luo_file_handler_list);
 
+	liveupdate_test_register(fh);
+