Re: [PATCH] selftests/landlock: fix broken include of linux/landlock.h

From: Mickaël Salaün
Date: Thu Aug 25 2022 - 05:31:38 EST



On 22/08/2022 16:00, Anders Roxell wrote:
On Sat, 13 Aug 2022 at 14:31, Mickaël Salaün <mic@xxxxxxxxxxx> wrote:


On 13/08/2022 12:01, Anders Roxell wrote:
On Wed, 3 Aug 2022 at 22:14, Guillaume Tucker
<guillaume.tucker@xxxxxxxxxxxxx> wrote:

Revert part of the earlier changes to fix the kselftest build when
using a sub-directory from the top of the tree as this broke the
landlock test build as a side-effect when building with "make -C
tools/testing/selftests/landlock".

Reported-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Fixes: a917dd94b832 ("selftests/landlock: drop deprecated headers dependency")
Fixes: f2745dc0ba3d ("selftests: stop using KSFT_KHDR_INSTALL")
Signed-off-by: Guillaume Tucker <guillaume.tucker@xxxxxxxxxxxxx>

Building with this patch doesn't work, it gives this output:
make[3]: Entering directory
'/home/anders/src/kernel/next/tools/testing/selftests/landlock'
make[3]: Leaving directory
'/home/anders/src/kernel/next/tools/testing/selftests/landlock'
make[3]: *** No rule to make target
'/home/anders/.cache/tuxmake/builds/78/build/kselftest/landlock/base_test',
needed by 'all'. Stop.

I'm building like this:
tuxmake --runtime podman --target-arch x86_64 --toolchain gcc-12
--kconfig defconfig kselftest

which translates into this make command:
make --silent --keep-going --jobs=32
O=/home/anders/.cache/tuxmake/builds/78/build
INSTALL_PATH=/home/anders/.cache/tuxmake/builds/78/build/kselftest_install
ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- kselftest-install

This works well for me.

Interesting

I used this command (inspired by yours):

make --silent --keep-going --jobs=32 "O=${HOME}/build" "INSTALL_PATH=${HOME}/build/kselftest_install" ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- kselftest-install

Can you run this command without using tuxmake?



Which commit is checkout?

I used the latest next tag, I tried to on todays tag as well
next-20220822 and I see
the same issue.
building without 'O=...' I can build the landlock tests...

Can you test it with Linux v5.19 and v6.0-rc2 and see if there is a difference?

Is your workspace clean?
What is the version of your make?

Can you replace this line from the Makefile with static names?
"src_test := $(wildcard *_test.c)"







building without this patch works, see below:

make[3]: Entering directory
'/home/anders/src/kernel/next/tools/testing/selftests/landlock'
x86_64-linux-gnu-gcc -Wall -O2 -isystem
/home/anders/.cache/tuxmake/builds/77/build/usr/include base_test.c
-o /home/anders/.cache/tuxmake/builds/77/build/kselftest/landlock/base_test
-lcap
x86_64-linux-gnu-gcc -Wall -O2 -isystem
/home/anders/.cache/tuxmake/builds/77/build/usr/include fs_test.c
-o /home/anders/.cache/tuxmake/builds/77/build/kselftest/landlock/fs_test
-lcap
x86_64-linux-gnu-gcc -Wall -O2 -isystem
/home/anders/.cache/tuxmake/builds/77/build/usr/include
ptrace_test.c -o
/home/anders/.cache/tuxmake/builds/77/build/kselftest/landlock/ptrace_test
-lcap
x86_64-linux-gnu-gcc -Wall -O2 -isystem
/home/anders/.cache/tuxmake/builds/77/build/usr/include true.c -o
/home/anders/.cache/tuxmake/builds/77/build/kselftest/landlock/true
-static
make[3]: Leaving directory
'/home/anders/src/kernel/next/tools/testing/selftests/landlock'
Does this work if you revert this patch, commit a917dd94b832
("selftests/landlock: drop deprecated headers dependency") and commit
f2745dc0ba3d ("selftests: stop using KSFT_KHDR_INSTALL")?

This patch mainly revert commit a917dd94b832, so I don't see the issue.



Cheers,
Anders

---
tools/testing/selftests/landlock/Makefile | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile
index a6959df28eb0..02868ac3bc71 100644
--- a/tools/testing/selftests/landlock/Makefile
+++ b/tools/testing/selftests/landlock/Makefile
@@ -9,10 +9,13 @@ TEST_GEN_PROGS := $(src_test:.c=)
TEST_GEN_PROGS_EXTENDED := true

OVERRIDE_TARGETS := 1
+top_srcdir := ../../../..
include ../lib.mk

+khdr_dir = $(top_srcdir)/usr/include
+
$(OUTPUT)/true: true.c
$(LINK.c) $< $(LDLIBS) -o $@ -static

-$(OUTPUT)/%_test: %_test.c ../kselftest_harness.h common.h
- $(LINK.c) $< $(LDLIBS) -o $@ -lcap
+$(OUTPUT)/%_test: %_test.c $(khdr_dir)/linux/landlock.h ../kselftest_harness.h common.h
+ $(LINK.c) $< $(LDLIBS) -o $@ -lcap -I$(khdr_dir)
--
2.30.2