selftests: Add install target

This adds make install support to selftests. The basic usage is:

$ cd tools/testing/selftests
$ make install

That installs into tools/testing/selftests/install, which can then be
copied where ever necessary.

The install destination is also configurable using eg:

$ INSTALL_PATH=/mnt/selftests make install

The implementation uses two targets in the child makefiles. The first
"install" is expected to install all files into $(INSTALL_PATH).

The second, "emit_tests", is expected to emit the test instructions (ie.
bash script) on stdout. Separating this from install means the child
makefiles need no knowledge of the location of the test script.

Signed-off-by: Michael Ellerman <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/Makefile

···
 		make -C $$TARGET clean; \
 	done;
 
+INSTALL_PATH ?= install
+INSTALL_PATH := $(abspath $(INSTALL_PATH))
+ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh
+
+install:
+ifdef INSTALL_PATH
+	@# Ask all targets to install their files
+	mkdir -p $(INSTALL_PATH)
+	for TARGET in $(TARGETS); do \
+		mkdir -p $(INSTALL_PATH)/$$TARGET ; \
+		make -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
+	done;
+
+	@# Ask all targets to emit their test scripts
+	echo "#!/bin/bash" > $(ALL_SCRIPT)
+	echo "cd \$$(dirname \$$0)" >> $(ALL_SCRIPT)
+	echo "ROOT=\$$PWD" >> $(ALL_SCRIPT)
+
+	for TARGET in $(TARGETS); do \
+		echo "echo ; echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \
+		echo "echo ========================================" >> $(ALL_SCRIPT); \
+		echo "cd $$TARGET" >> $(ALL_SCRIPT); \
+		make -s --no-print-directory -C $$TARGET emit_tests >> $(ALL_SCRIPT); \
+		echo "cd \$$ROOT" >> $(ALL_SCRIPT); \
+	done;
+
+	chmod u+x $(ALL_SCRIPT)
+else
+	$(error Error: set INSTALL_PATH to use install)
+endif
+
 clean:
 	for TARGET in $(TARGETS); do \
 		make -C $$TARGET clean; \
 	done;
+
+.PHONY: install

tools/testing/selftests/efivarfs/Makefile

···
 all: $(test_objs)
 
 TEST_PROGS := efivarfs.sh
+TEST_FILES := $(test_objs)
 
 include ../lib.mk
 

tools/testing/selftests/exec/Makefile

···
 	$(CC) $(CFLAGS) -o $@ $^
 
 TEST_PROGS := execveat
+TEST_FILES := $(DEPS)
 
 include ../lib.mk
+
+override EMIT_TESTS := echo "mkdir -p subdir; (./execveat && echo \"selftests: execveat [PASS]\") || echo \"selftests: execveat [FAIL]\""
 
 clean:
 	rm -rf $(BINARIES) $(DEPS) subdir.moved execveat.moved xxxxx*

tools/testing/selftests/lib.mk

···
 run_tests: all
 	$(RUN_TESTS)
 
-.PHONY: run_tests all clean
+define INSTALL_RULE
+	mkdir -p $(INSTALL_PATH)
+	install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_FILES)
+endef
+
+install: all
+ifdef INSTALL_PATH
+	$(INSTALL_RULE)
+else
+	$(error Error: set INSTALL_PATH to use install)
+endif
+
+define EMIT_TESTS
+	@for TEST in $(TEST_PROGS); do \
+		echo "(./$$TEST && echo \"selftests: $$TEST [PASS]\") || echo \"selftests: $$TEST [FAIL]\""; \
+	done;
+endef
+
+emit_tests:
+	$(EMIT_TESTS)
+
+.PHONY: run_tests all clean install emit_tests

tools/testing/selftests/memory-hotplug/Makefile

···
 
 include ../lib.mk
 
+TEST_PROGS := on-off-test.sh
 override RUN_TESTS := ./on-off-test.sh -r 2 || echo "selftests: memory-hotplug [FAIL]"
+override EMIT_TESTS := echo "$(RUN_TESTS)"
 
 run_full_test:
 	@/bin/bash ./on-off-test.sh || echo "memory-hotplug selftests: [FAIL]"

tools/testing/selftests/mount/Makefile

···
 
 include ../lib.mk
 
+TEST_PROGS := unprivileged-remount-test
 override RUN_TESTS := if [ -f /proc/self/uid_map ] ; then ./unprivileged-remount-test ; fi
+override EMIT_TESTS := echo "$(RUN_TESTS)"
 
 clean:
 	rm -f unprivileged-remount-test

tools/testing/selftests/mqueue/Makefile

···
 	@./mq_perf_tests || echo "selftests: mq_perf_tests [FAIL]"
 endef
 
+TEST_PROGS := mq_open_tests mq_perf_tests
+
+override define EMIT_TESTS
+	echo "./mq_open_tests /test1 || echo \"selftests: mq_open_tests [FAIL]\""
+	echo "./mq_perf_tests || echo \"selftests: mq_perf_tests [FAIL]\""
+endef
+
 clean:
 	rm -f mq_open_tests mq_perf_tests

tools/testing/selftests/net/Makefile

···
 	$(CC) $(CFLAGS) -o $@ $^
 
 TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh
+TEST_FILES := $(NET_PROGS)
 
 include ../lib.mk
 

tools/testing/selftests/sysctl/Makefile

···
 all:
 
 TEST_PROGS := run_numerictests run_stringtests
+TEST_FILES := common_tests
 
 include ../lib.mk
 

tools/testing/selftests/vm/Makefile

···
 	$(CC) $(CFLAGS) -o $@ $^ -lrt
 
 TEST_PROGS := run_vmtests
+TEST_FILES := $(BINARIES)
 
 include ../lib.mk