Add TEST_GEN_MODS_DIR variable for kselftests. It can point to a directory containing kernel modules that will be used by selftest scripts.
The modules are built as external modules for the running kernel. As a result they are always binary compatible and the same tests can be used for older or newer kernels.
The build requires "kernel-devel" package to be installed. For example, in the upstream sources, the rpm devel package is produced by "make rpm-pkg"
The modules can be built independently by
make -C tools/testing/selftests/livepatch/
or they will be automatically built before running the tests via
make -C tools/testing/selftests/livepatch/ run_tests
Note that they are _not_ built when running the standalone tests by calling, for example, ./test-state.sh.
Along with TEST_GEN_MODS_DIR, it was necessary to create a new install rule. INSTALL_MODS_RULE is needed because INSTALL_SINGLE_RULE would copy the entire TEST_GEN_MODS_DIR directory to the destination, even the files created by Kbuild to compile the modules. The new install rule copies only the .ko files, as we would expect the gen_tar to work.
Reviewed-by: Joe Lawrence joe.lawrence@redhat.com Signed-off-by: Marcos Paulo de Souza mpdesouza@suse.com --- Documentation/dev-tools/kselftest.rst | 4 ++++ tools/testing/selftests/lib.mk | 25 ++++++++++++++++++++----- 2 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst index ab376b316c36..7f3582a67318 100644 --- a/Documentation/dev-tools/kselftest.rst +++ b/Documentation/dev-tools/kselftest.rst @@ -245,6 +245,10 @@ Contributing new tests (details) TEST_PROGS, TEST_GEN_PROGS mean it is the executable tested by default.
+ TEST_GEN_MODS_DIR should be used by tests that require modules to be built + before the test starts. The variable will contain the name of the directory + containing the modules. + TEST_CUSTOM_PROGS should be used by tests that require custom build rules and prevent common build rule use.
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 118e0964bda9..d77dda59f6a2 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -70,12 +70,15 @@ KHDR_INCLUDES := -isystem $(KHDR_DIR) # TEST_PROGS are for test shell scripts. # TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests # and install targets. Common clean doesn't touch them. +# TEST_GEN_MODS_DIR is used to specify a directory with modules to be built +# before the test executes. These modules are cleaned on the clean target as well. TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS)) TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED)) TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES)) +TEST_GEN_MODS_DIR := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_MODS_DIR))
all: kernel_header_files $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) \ - $(TEST_GEN_FILES) + $(TEST_GEN_FILES) $(if $(TEST_GEN_MODS_DIR),gen_mods_dir)
kernel_header_files: @ls $(KHDR_DIR)/linux/*.h >/dev/null 2>/dev/null; \ @@ -105,8 +108,8 @@ endef
run_tests: all ifdef building_out_of_srctree - @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \ - rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \ + @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)$(TEST_GEN_MODS_DIR)" != "X" ]; then \ + rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(TEST_GEN_MODS_DIR) $(OUTPUT); \ fi @if [ "X$(TEST_PROGS)" != "X" ]; then \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \ @@ -118,11 +121,22 @@ else @$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS)) endif
+gen_mods_dir: + $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) + +clean_mods_dir: + $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean + define INSTALL_SINGLE_RULE $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)) $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/) endef
+define INSTALL_MODS_RULE + $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)/$(INSTALL_LIST)) + $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST)/*.ko $(INSTALL_PATH)/$(INSTALL_LIST)) +endef + define INSTALL_RULE $(eval INSTALL_LIST = $(TEST_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE) @@ -131,6 +145,7 @@ define INSTALL_RULE $(eval INSTALL_LIST = $(TEST_CUSTOM_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_FILES)) $(INSTALL_SINGLE_RULE) + $(eval INSTALL_LIST = $(notdir $(TEST_GEN_MODS_DIR))) $(INSTALL_MODS_RULE) $(eval INSTALL_LIST = $(wildcard config settings)) $(INSTALL_SINGLE_RULE) endef
@@ -156,7 +171,7 @@ define CLEAN $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN) endef
-clean: +clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir) $(CLEAN)
# Enables to extend CFLAGS and LDFLAGS from command line, e.g. @@ -187,4 +202,4 @@ $(OUTPUT)/%:%.S $(LINK.S) $^ $(LDLIBS) -o $@ endif
-.PHONY: run_tests all clean install emit_tests +.PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir