[lvm-devel] [PATCH v1 08/17] tests: Support idm failure injection

[Leo Yan]

When the drive failure occurs, the IDM lock manager and lvmlockd should
handle this case properly.  E.g. when the IDM lock manager detects the
lease renewal failure caused by I/O errors, it should invoke the kill
path which is predefined by lvmlockd, so that the kill path program
(like lvmlockctl) can send requests to lvmlockd to stop and drop lock
for the relevant VG/LVs.

To verify the failure handling flow, this patch introduces an idm
failure injection program, it can input the "percentage" for drive
failures so that can emulate different failure cases.

Signed-off-by: Leo Yan <leo.yan at linaro.org>
---
 test/Makefile.in              |  5 ++++
 test/lib/idm_inject_failure.c | 55 +++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 test/lib/idm_inject_failure.c

diff --git a/test/Makefile.in b/test/Makefile.in
index 662974be6..573df77a7 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -171,6 +171,7 @@ endif
 
 ifeq ("@BUILD_LVMLOCKD@", "yes")
 check_lvmlockd_idm: .tests-stamp
+	$(INSTALL_PROGRAM) lib/idm_inject_failure $(EXECDIR)
 	VERBOSE=$(VERBOSE) ./lib/runner \
 		--testdir . --outdir $(LVM_TEST_RESULTS) \
 		--flavours udev-lvmlockd-idm --only shell/aa-lvmlockd-idm-prepare.sh,$(T),shell/zz-lvmlockd-idm-remove.sh --skip $(S)
@@ -269,6 +270,10 @@ lib/securetest: lib/dmsecuretest.o .lib-dir-stamp
 	@echo "    [CC] $@"
 	$(Q) $(CC) -g $(CFLAGS) $(LDFLAGS) $(EXTRA_EXEC_LDFLAGS) $(ELDFLAGS) -o $@ $< -L$(interfacebuilddir) -ldevmapper $(LIBS)
 
+lib/idm_inject_failure: lib/idm_inject_failure.o .lib-dir-stamp
+	@echo "    [CC] $@"
+	$(Q) $(CC) -g $(CFLAGS) $(LDFLAGS) $(EXTRA_EXEC_LDFLAGS) $(ELDFLAGS) -o $@ $< $(INTERNAL_LIBS) $(LIBS) -lseagate_ilm
+
 lib/runner.o: $(wildcard $(srcdir)/lib/*.h)
 
 CFLAGS_runner.o += $(EXTRA_EXEC_CFLAGS)
diff --git a/test/lib/idm_inject_failure.c b/test/lib/idm_inject_failure.c
new file mode 100644
index 000000000..4998b585a
--- /dev/null
+++ b/test/lib/idm_inject_failure.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020-2021 Seagate Ltd.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/inotify.h>
+#include <uuid/uuid.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <ilm.h>
+
+int main(int argc, char *argv[])
+{
+	int pecent = atoi(argv[1]);
+	int ret, s;
+
+	ret = ilm_connect(&s);
+	if (ret == 0) {
+		printf("ilm_connect: SUCCESS\n");
+	} else {
+		printf("ilm_connect: FAIL\n");
+		exit(-1);
+	}
+
+	ret = ilm_inject_fault(s, pecent);
+	if (ret == 0) {
+		printf("ilm_inject_fault (100): SUCCESS\n");
+	} else {
+		printf("ilm_inject_fault (100): FAIL\n");
+		exit(-1);
+	}
+
+	ret = ilm_disconnect(s);
+	if (ret == 0) {
+		printf("ilm_disconnect: SUCCESS\n");
+	} else {
+		printf("ilm_disconnect: FAIL\n");
+		exit(-1);
+	}
+
+	return 0;
+}
-- 
2.25.1