From: Ilya Leoshkevich iii@linux.ibm.com
mainline inclusion from mainline-5.13-rc1 commit 86fd166575c38c17ecd3a6b8fb9c64fa19871486 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Building selftests in a separate directory like this:
make O="$BUILD" -C tools/testing/selftests/bpf
and then running:
cd "$BUILD" && ./test_progs -t btf
causes all the non-flavored btf_dump_test_case_*.c tests to fail, because these files are not copied to where test_progs expects to find them.
Fix by not skipping EXT-COPY when the original $(OUTPUT) is not empty (lib.mk sets it to $(shell pwd) in that case) and using rsync instead of cp: cp fails because e.g. urandom_read is being copied into itself, and rsync simply skips such cases. rsync is already used by kselftests and therefore is not a new dependency.
Signed-off-by: Ilya Leoshkevich iii@linux.ibm.com Signed-off-by: Andrii Nakryiko andrii@kernel.org Link: https://lore.kernel.org/bpf/20210224111445.102342-1-iii@linux.ibm.com (cherry picked from commit 86fd166575c38c17ecd3a6b8fb9c64fa19871486) Signed-off-by: Wang Yufen wangyufen@huawei.com --- tools/testing/selftests/bpf/Makefile | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index c654cbc1f622..cd0e436be9d9 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -387,11 +387,12 @@ $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o: \ $$(call msg,EXT-OBJ,$(TRUNNER_BINARY),$$@) $(Q)$$(CC) $$(CFLAGS) -c $$< $$(LDLIBS) -o $$@
-# only copy extra resources if in flavored build +# non-flavored in-srctree builds receive special treatment, in particular, we +# do not need to copy extra resources (see e.g. test_btf_dump_case()) $(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT) -ifneq ($2,) +ifneq ($2:$(OUTPUT),:$(shell pwd)) $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES)) - $(Q)cp -a $$^ $(TRUNNER_OUTPUT)/ + $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/ endif
$(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS) \