[PATCH net 0/2] selftests/bpf: fix ima_setup.sh missing issue

[PATCH net 0/2] selftests/bpf: fix ima_setup.sh missing issue

[Hangbin Liu]

The ima_setup.sh is needed by test_progs test_ima. But the file is
missed if we build test_progs separately or installed bpf test to
another folder. This patch set fixed the issue in 2 different
scenarios.

Hangbin Liu (2):
  selftests/bpf: Fix build error with ima_setup.sh
  selftests/bpf: add missed ima_setup.sh in Makefile

 tools/testing/selftests/bpf/Makefile | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

-- 
2.35.1

[PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Hangbin Liu]

KP fixed ima_setup.sh missing issue when build test_progs separately with
commit 854055c0cf30 ("selftests/bpf: Fix flavored variants of
test_ima"). But the fix is incorrect because the build will failed with
error:

  $ OUTPUT="/tmp/bpf" make test_progs
    [...]
  make: *** No rule to make target '/tmp/bpf/ima_setup.sh', needed by 'ima_setup.sh'.  Stop.

Fix it by adding a new variable TRUNNER_EXTRA_BUILD to build extra binaries.
Left TRUNNER_EXTRA_FILES only for copying files

Fixes: 854055c0cf30 ("selftests/bpf: Fix flavored variants of test_ima")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 tools/testing/selftests/bpf/Makefile | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 3820608faf57..5944d3a8fff6 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -466,10 +466,10 @@ $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:				\
 
 # 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) | $(TRUNNER_OUTPUT)
+$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_BUILD) | $(TRUNNER_OUTPUT)
 ifneq ($2:$(OUTPUT),:$(shell pwd))
 	$$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
-	$(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
+	$(Q)rsync -aq $(TRUNNER_EXTRA_FILES) $(TRUNNER_OUTPUT)/
 endif
 
 $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)			\
@@ -490,9 +490,9 @@ TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c	\
 			 network_helpers.c testing_helpers.c		\
 			 btf_helpers.c flow_dissector_load.h		\
 			 cap_helpers.c
-TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko	\
-		       ima_setup.sh					\
+TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko	\
 		       $(wildcard progs/btf_dump_test_case_*.c)
+TRUNNER_EXTRA_FILES := $(TRUNNER_EXTRA_BUILD) ima_setup.sh
 TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
 TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS) -DENABLE_ATOMICS_TESTS
 $(eval $(call DEFINE_TEST_RUNNER,test_progs))
@@ -513,6 +513,7 @@ endif
 TRUNNER_TESTS_DIR := map_tests
 TRUNNER_BPF_PROGS_DIR := progs
 TRUNNER_EXTRA_SOURCES := test_maps.c
+TRUNNER_EXTRA_BUILD :=
 TRUNNER_EXTRA_FILES :=
 TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
 TRUNNER_BPF_CFLAGS :=
-- 
2.35.1

[PATCH net 2/2] selftests/bpf: add missed ima_setup.sh in Makefile

[Hangbin Liu]

When build bpf test and install it to another folder, e.g.

  make -j10 install -C tools/testing/selftests/ TARGETS="bpf" \
	SKIP_TARGETS="" INSTALL_PATH=/tmp/kselftests

The ima_setup.sh is missed in target folder, which makes test_ima failed.

Fix it by adding ima_setup.sh to TEST_PROGS_EXTENDED.

Fixes: 34b82d3ac105 ("bpf: Add a selftest for bpf_ima_inode_hash")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 tools/testing/selftests/bpf/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 5944d3a8fff6..b4fd1352a2ac 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -75,7 +75,7 @@ TEST_PROGS := test_kmod.sh \
 	test_xsk.sh
 
 TEST_PROGS_EXTENDED := with_addr.sh \
-	with_tunnels.sh \
+	with_tunnels.sh ima_setup.sh \
 	test_xdp_vlan.sh test_bpftool.py
 
 # Compile but not part of 'make run_tests'
-- 
2.35.1

Re: [PATCH net 0/2] selftests/bpf: fix ima_setup.sh missing issue

[Alexei Starovoitov]

On Thu, May 12, 2022 at 12:18 AM Hangbin Liu <liuhangbin@gmail.com> wrote:
>
> The ima_setup.sh is needed by test_progs test_ima. But the file is
> missed if we build test_progs separately or installed bpf test to
> another folder. This patch set fixed the issue in 2 different
> scenarios.

Patch subject is incorrect.
Please use [PATCH bpf-next].

Re: [PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Andrii Nakryiko]

On Thu, May 12, 2022 at 12:18 AM Hangbin Liu <liuhangbin@gmail.com> wrote:
>
> KP fixed ima_setup.sh missing issue when build test_progs separately with
> commit 854055c0cf30 ("selftests/bpf: Fix flavored variants of
> test_ima"). But the fix is incorrect because the build will failed with
> error:
>
>   $ OUTPUT="/tmp/bpf" make test_progs
>     [...]
>   make: *** No rule to make target '/tmp/bpf/ima_setup.sh', needed by 'ima_setup.sh'.  Stop.
>
> Fix it by adding a new variable TRUNNER_EXTRA_BUILD to build extra binaries.
> Left TRUNNER_EXTRA_FILES only for copying files
>
> Fixes: 854055c0cf30 ("selftests/bpf: Fix flavored variants of test_ima")
> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
> ---
>  tools/testing/selftests/bpf/Makefile | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 3820608faf57..5944d3a8fff6 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -466,10 +466,10 @@ $(TRUNNER_EXTRA_OBJS): $(TRUNNER_OUTPUT)/%.o:                             \
>
>  # non-flavored in-srctree builds receive special treatment, in particular, we
>  # do not need to copy extra resources (see e.g. test_btf_dump_case())
> -$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_FILES) | $(TRUNNER_OUTPUT)
> +$(TRUNNER_BINARY)-extras: $(TRUNNER_EXTRA_BUILD) | $(TRUNNER_OUTPUT)
>  ifneq ($2:$(OUTPUT),:$(shell pwd))
>         $$(call msg,EXT-COPY,$(TRUNNER_BINARY),$(TRUNNER_EXTRA_FILES))
> -       $(Q)rsync -aq $$^ $(TRUNNER_OUTPUT)/
> +       $(Q)rsync -aq $(TRUNNER_EXTRA_FILES) $(TRUNNER_OUTPUT)/
>  endif
>
>  $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS)                      \
> @@ -490,9 +490,9 @@ TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c      \
>                          network_helpers.c testing_helpers.c            \
>                          btf_helpers.c flow_dissector_load.h            \
>                          cap_helpers.c
> -TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> -                      ima_setup.sh                                     \
> +TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
>                        $(wildcard progs/btf_dump_test_case_*.c)


note that progs/btf_dump_test_case_*.c are not built, they are just
copied over (C source files), so I don't think this fix is necessary.

btw, I tried running `OUTPUT="/tmp/bpf" make test_progs` and it didn't
error out. But tbh, I'd recommend building everything instead of
building individual targets.


> +TRUNNER_EXTRA_FILES := $(TRUNNER_EXTRA_BUILD) ima_setup.sh
>  TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
>  TRUNNER_BPF_CFLAGS := $(BPF_CFLAGS) $(CLANG_CFLAGS) -DENABLE_ATOMICS_TESTS
>  $(eval $(call DEFINE_TEST_RUNNER,test_progs))
> @@ -513,6 +513,7 @@ endif
>  TRUNNER_TESTS_DIR := map_tests
>  TRUNNER_BPF_PROGS_DIR := progs
>  TRUNNER_EXTRA_SOURCES := test_maps.c
> +TRUNNER_EXTRA_BUILD :=
>  TRUNNER_EXTRA_FILES :=
>  TRUNNER_BPF_BUILD_RULE := $$(error no BPF objects should be built)
>  TRUNNER_BPF_CFLAGS :=
> --
> 2.35.1
>

Re: [PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Hangbin Liu]

On Fri, May 13, 2022 at 02:58:05PM -0700, Andrii Nakryiko wrote:
> > -TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > -                      ima_setup.sh                                     \
> > +TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> >                        $(wildcard progs/btf_dump_test_case_*.c)
> 
> 
> note that progs/btf_dump_test_case_*.c are not built, they are just
> copied over (C source files), so I don't think this fix is necessary.
> 
> btw, I tried running `OUTPUT="/tmp/bpf" make test_progs` and it didn't
> error out. But tbh, I'd recommend building everything instead of
> building individual targets.

After update the code to latest bpf-next. It works this time, the ima_setup.sh
was copied to target folder correctly. 

  EXT-COPY [test_progs] urandom_read bpf_testmod.ko liburandom_read.so ima_setup.sh btf_dump_test_case_bitfields.c btf_dump_test_case_multidim.c btf_dump_test_case_namespacing.c btf_dump_test_case_ordering.c btf_dump_test_case_packing.c btf_dump_test_case_padding.c btf_dump_test_case_syntax.c
  BINARY   test_progs

Not sure why the previous kernel doesn't work. But anyway I will drop this patch.

On the other hand, when I build with latest bpf-next. I got error like:

"""
# OUTPUT="/tmp/bpf" make test_progs
  BINARY   urandom_read                                                                                                                                                       gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR  -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c  \
          liburandom_read.so -lelf -lz -lrt -lpthread   \
          -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read
/usr/bin/ld: cannot find liburandom_read.so: No such file or directory                                                                                                        collect2: error: ld returned 1 exit status
make: *** [Makefile:177: /tmp/bpf/urandom_read] Error 1

# ls /tmp/bpf/liburandom_read.so
/tmp/bpf/liburandom_read.so
"""

after I copy to liburandom_read.so back to tools/testing/selftests/bpf the build
success.

"""
# cp /tmp/bpf/liburandom_read.so /home/net/tools/testing/selftests/bpf/
# gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c liburandom_read.so -lelf -lz -lrt -lpthread -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read
# echo $?
0
"""

Do you know why this happens?

Thanks
Hangbin

Re: [PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Andrii Nakryiko]

On Sun, May 15, 2022 at 8:53 PM Hangbin Liu <liuhangbin@gmail.com> wrote:
>
> On Fri, May 13, 2022 at 02:58:05PM -0700, Andrii Nakryiko wrote:
> > > -TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > > -                      ima_setup.sh                                     \
> > > +TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > >                        $(wildcard progs/btf_dump_test_case_*.c)
> >
> >
> > note that progs/btf_dump_test_case_*.c are not built, they are just
> > copied over (C source files), so I don't think this fix is necessary.
> >
> > btw, I tried running `OUTPUT="/tmp/bpf" make test_progs` and it didn't
> > error out. But tbh, I'd recommend building everything instead of
> > building individual targets.
>
> After update the code to latest bpf-next. It works this time, the ima_setup.sh
> was copied to target folder correctly.
>
>   EXT-COPY [test_progs] urandom_read bpf_testmod.ko liburandom_read.so ima_setup.sh btf_dump_test_case_bitfields.c btf_dump_test_case_multidim.c btf_dump_test_case_namespacing.c btf_dump_test_case_ordering.c btf_dump_test_case_packing.c btf_dump_test_case_padding.c btf_dump_test_case_syntax.c
>   BINARY   test_progs
>
> Not sure why the previous kernel doesn't work. But anyway I will drop this patch.
>
> On the other hand, when I build with latest bpf-next. I got error like:
>
> """
> # OUTPUT="/tmp/bpf" make test_progs
>   BINARY   urandom_read                                                                                                                                                       gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR  -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c  \
>           liburandom_read.so -lelf -lz -lrt -lpthread   \
>           -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read

we assume liburandom_read.so is going to be under selftests/bpf here,
but it's actually under $(OUTPUT)/

Can you try $(OUTPUT)/liburandom_read.so? I suspect this might break
-rpath=., though, but let's try this first?


> /usr/bin/ld: cannot find liburandom_read.so: No such file or directory                                                                                                        collect2: error: ld returned 1 exit status
> make: *** [Makefile:177: /tmp/bpf/urandom_read] Error 1
>
> # ls /tmp/bpf/liburandom_read.so
> /tmp/bpf/liburandom_read.so
> """
>
> after I copy to liburandom_read.so back to tools/testing/selftests/bpf the build
> success.
>
> """
> # cp /tmp/bpf/liburandom_read.so /home/net/tools/testing/selftests/bpf/
> # gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c liburandom_read.so -lelf -lz -lrt -lpthread -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read
> # echo $?
> 0
> """
>
> Do you know why this happens?
>
> Thanks
> Hangbin

Re: [PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Hangbin Liu]

On Wed, May 18, 2022 at 03:36:53PM -0700, Andrii Nakryiko wrote:
> > On Fri, May 13, 2022 at 02:58:05PM -0700, Andrii Nakryiko wrote:
> > > > -TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > > > -                      ima_setup.sh                                     \
> > > > +TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > > >                        $(wildcard progs/btf_dump_test_case_*.c)
> > >
> > >
> > > note that progs/btf_dump_test_case_*.c are not built, they are just
> > > copied over (C source files), so I don't think this fix is necessary.
> > >
> > > btw, I tried running `OUTPUT="/tmp/bpf" make test_progs` and it didn't
> > > error out. But tbh, I'd recommend building everything instead of
> > > building individual targets.
> >
> > After update the code to latest bpf-next. It works this time, the ima_setup.sh
> > was copied to target folder correctly.
> >
> >   EXT-COPY [test_progs] urandom_read bpf_testmod.ko liburandom_read.so ima_setup.sh btf_dump_test_case_bitfields.c btf_dump_test_case_multidim.c btf_dump_test_case_namespacing.c btf_dump_test_case_ordering.c btf_dump_test_case_packing.c btf_dump_test_case_padding.c btf_dump_test_case_syntax.c
> >   BINARY   test_progs
> >
> > Not sure why the previous kernel doesn't work. But anyway I will drop this patch.
> >
> > On the other hand, when I build with latest bpf-next. I got error like:
> >
> > """
> > # OUTPUT="/tmp/bpf" make test_progs
> >   BINARY   urandom_read                                                                                                                                                       gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR  -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c  \
> >           liburandom_read.so -lelf -lz -lrt -lpthread   \
> >           -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read
> 
> we assume liburandom_read.so is going to be under selftests/bpf here,
> but it's actually under $(OUTPUT)/
> 
> Can you try $(OUTPUT)/liburandom_read.so? I suspect this might break
> -rpath=., though, but let's try this first?

Sigh.. After rebase to latest bpf-next, to make clean and re-do
`OUTPUT="/tmp/bpf" make test_progs`, There is no liburandom_read.so build
issue but the ima_setup.sh error come up again...

  LINK     resolve_btfids
  LIB      liburandom_read.so
  BINARY   urandom_read
  MOD      bpf_testmod.ko
  CC [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.o
  MODPOST /home/net/tools/testing/selftests/bpf/bpf_testmod/Module.symvers
  CC [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.mod.o
  LD [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
  BTF [M] /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
make: *** No rule to make target '/tmp/bpf/ima_setup.sh', needed by 'ima_setup.sh'.  Stop.

Not sure if it's a build environment setup issue or others.

Hangbin

Re: [PATCH net 1/2] selftests/bpf: Fix build error with ima_setup.sh

[Andrii Nakryiko]

On Wed, May 18, 2022 at 7:44 PM Hangbin Liu <liuhangbin@gmail.com> wrote:
>
> On Wed, May 18, 2022 at 03:36:53PM -0700, Andrii Nakryiko wrote:
> > > On Fri, May 13, 2022 at 02:58:05PM -0700, Andrii Nakryiko wrote:
> > > > > -TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > > > > -                      ima_setup.sh                                     \
> > > > > +TRUNNER_EXTRA_BUILD := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
> > > > >                        $(wildcard progs/btf_dump_test_case_*.c)
> > > >
> > > >
> > > > note that progs/btf_dump_test_case_*.c are not built, they are just
> > > > copied over (C source files), so I don't think this fix is necessary.
> > > >
> > > > btw, I tried running `OUTPUT="/tmp/bpf" make test_progs` and it didn't
> > > > error out. But tbh, I'd recommend building everything instead of
> > > > building individual targets.
> > >
> > > After update the code to latest bpf-next. It works this time, the ima_setup.sh
> > > was copied to target folder correctly.
> > >
> > >   EXT-COPY [test_progs] urandom_read bpf_testmod.ko liburandom_read.so ima_setup.sh btf_dump_test_case_bitfields.c btf_dump_test_case_multidim.c btf_dump_test_case_namespacing.c btf_dump_test_case_ordering.c btf_dump_test_case_packing.c btf_dump_test_case_padding.c btf_dump_test_case_syntax.c
> > >   BINARY   test_progs
> > >
> > > Not sure why the previous kernel doesn't work. But anyway I will drop this patch.
> > >
> > > On the other hand, when I build with latest bpf-next. I got error like:
> > >
> > > """
> > > # OUTPUT="/tmp/bpf" make test_progs
> > >   BINARY   urandom_read                                                                                                                                                       gcc -g -O0 -rdynamic -Wall -Werror -DHAVE_GENHDR  -I/home/net/tools/testing/selftests/bpf -I/tmp/bpf/tools/include -I/home/net/include/generated -I/home/net/tools/lib -I/home/net/tools/include -I/home/net/tools/include/uapi -I/tmp/bpf  urandom_read.c urandom_read_aux.c  \
> > >           liburandom_read.so -lelf -lz -lrt -lpthread   \
> > >           -Wl,-rpath=. -Wl,--build-id=sha1 -o /tmp/bpf/urandom_read
> >
> > we assume liburandom_read.so is going to be under selftests/bpf here,
> > but it's actually under $(OUTPUT)/
> >
> > Can you try $(OUTPUT)/liburandom_read.so? I suspect this might break
> > -rpath=., though, but let's try this first?
>
> Sigh.. After rebase to latest bpf-next, to make clean and re-do
> `OUTPUT="/tmp/bpf" make test_progs`, There is no liburandom_read.so build
> issue but the ima_setup.sh error come up again...
>
>   LINK     resolve_btfids
>   LIB      liburandom_read.so
>   BINARY   urandom_read
>   MOD      bpf_testmod.ko
>   CC [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.o
>   MODPOST /home/net/tools/testing/selftests/bpf/bpf_testmod/Module.symvers
>   CC [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.mod.o
>   LD [M]  /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
>   BTF [M] /home/net/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko
> make: *** No rule to make target '/tmp/bpf/ima_setup.sh', needed by 'ima_setup.sh'.  Stop.
>
> Not sure if it's a build environment setup issue or others.

I don't use OUTPUT when building selftests and see no issues, so this
must be related. If you care about OUTPUT working please try to debug
and figure this out.

>
> Hangbin