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[v2,bpf-next] selftests/bpf: Copy extras in out-of-srctree builds

Message ID 20210224111445.102342-1-iii@linux.ibm.com (mailing list archive)
State Accepted
Commit 86fd166575c38c17ecd3a6b8fb9c64fa19871486
Delegated to: BPF
Headers show
Series [v2,bpf-next] selftests/bpf: Copy extras in out-of-srctree builds | expand

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netdev/tree_selection success Clearly marked for bpf-next
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netdev/cc_maintainers warning 8 maintainers not CCed: netdev@vger.kernel.org shuah@kernel.org kpsingh@kernel.org linux-kselftest@vger.kernel.org songliubraving@fb.com yhs@fb.com kafai@fb.com john.fastabend@gmail.com
netdev/source_inline success Was 0 now: 0
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 15 lines checked
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Commit Message

Ilya Leoshkevich Feb. 24, 2021, 11:14 a.m. UTC
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>
---

v1: https://lore.kernel.org/bpf/20210222232451.84574-1-iii@linux.ibm.com/
v1 -> v2: Andrii has noticed that unconditional EXT-COPY pollutes the
          srctree in non-flavored in-srctree builds. Fix by making
          EXT-COPY conditional again, but this time skip it only for
          non-flavored in-srctree builds.

 tools/testing/selftests/bpf/Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Feb. 26, 2021, 9:30 p.m. UTC | #1
Hello:

This patch was applied to bpf/bpf-next.git (refs/heads/master):

On Wed, 24 Feb 2021 12:14:45 +0100 you wrote:
> 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
> 
> [...]

Here is the summary with links:
  - [v2,bpf-next] selftests/bpf: Copy extras in out-of-srctree builds
    https://git.kernel.org/bpf/bpf-next/c/86fd166575c3

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 044bfdcf5b74..a81af15e4ded 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -382,11 +382,12 @@  $(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)			\