On 3/2/21 5:44 PM, Ilya Leoshkevich wrote:

Currently the following command produces an error message:

 linux# make kselftest TARGETS=bpf O=/mnt/linux-build
 # selftests: bpf: test_libbpf.sh
 # ./test_libbpf.sh: line 23: ./test_libbpf_open: No such file or directory
 # test_libbpf: failed at file test_l4lb.o
 # selftests: test_libbpf [FAILED]

The error message might not affect the return code of make, therefore one needs to grep make output in order to detect it.

This is not the only instance of the same underlying problem; any test with more than one element in $(TEST_PROGS) fails the same way. Another example:

 linux# make O=/mnt/linux-build TARGETS=splice kselftest
 [...]
 # ./short_splice_read.sh: 15: ./splice_read: not found
 # FAIL: /sys/module/test_module/sections/.init.text 2
 not ok 2 selftests: splice: short_splice_read.sh # exit=1

The current logic prepends $(OUTPUT) only to the first member of $(TEST_PROGS). After that, run_one() does

cd `dirname $TEST`

For all tests except the first one, `dirname $TEST` is ., which means they cannot access the files generated in $(OUTPUT).

Fix by using $(addprefix) to prepend $(OUTPUT)/ to each member of $(TEST_PROGS).

Fixes: 1a940687e424 ("selftests: lib.mk: copy test scripts and test files for make O=dir run") Signed-off-by: Ilya Leoshkevich iii@linux.ibm.com

---

v1->v2:

• Append / to $(OUTPUT).
• Use $(addprefix) instead of $(foreach).

v2->v3:

• Split the patch in two.
• Improve the commit message.

v3: https://lore.kernel.org/linux-kselftest/20191024121347.22189-1-iii@linux.ibm... v3->v4:

• Drop the first patch.
• Add a note regarding make return code to the commit message.

v4: https://lore.kernel.org/linux-kselftest/20191115150428.61131-1-iii@linux.ibm... v4->v5:

• Add another reproducer to the commit message.

  tools/testing/selftests/lib.mk | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index a5ce26d548e4..be17462fe146 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -74,7 +74,8 @@ ifdef building_out_of_srctree rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \ fi @if [ "X$(TEST_PROGS)" != "X" ]; then \

• $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS)) ; \
  

• $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
  

• 		  $(addprefix $(OUTPUT)/,$(TEST_PROGS))) ; \
  

  else \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \ fi

Thank you. Will apply it for 5.13-rc1

thanks, -- Shuah