netdev - Re: [PATCH net 1/3] selftests: net: remove dependency on ebpf tests

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Date: Wed, 24 Jan 2024 20:10:01 -0500
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: Paolo Abeni <pabeni@...hat.com>, 
 netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, 
 Shuah Khan <shuah@...nel.org>, 
 Willem de Bruijn <willemb@...gle.com>, 
 Lucas Karpinski <lkarpins@...hat.com>, 
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net 1/3] selftests: net: remove dependency on ebpf tests

Paolo Abeni wrote:
> Several net tests requires an XDP program build under the ebpf
> directory, and error out if such program is not available.
> 
> That makes running successful net test hard, let's duplicate into the
> net dir the [very small] program, re-using the existing rules to build
> it, and finally dropping the bogus dependency.
> 
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> ---
>  tools/testing/selftests/net/Makefile          |  5 +++--
>  tools/testing/selftests/net/udpgro.sh         |  4 ++--
>  tools/testing/selftests/net/udpgro_bench.sh   |  4 ++--
>  tools/testing/selftests/net/udpgro_frglist.sh |  6 +++---
>  tools/testing/selftests/net/udpgro_fwd.sh     |  2 +-
>  tools/testing/selftests/net/veth.sh           |  4 ++--
>  tools/testing/selftests/net/xdp_dummy.c       | 13 +++++++++++++
>  7 files changed, 26 insertions(+), 12 deletions(-)
>  create mode 100644 tools/testing/selftests/net/xdp_dummy.c
> 
> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> index 50818075e566..304d8b852ef0 100644
> --- a/tools/testing/selftests/net/Makefile
> +++ b/tools/testing/selftests/net/Makefile
> @@ -84,6 +84,7 @@ TEST_PROGS += sctp_vrf.sh
>  TEST_GEN_FILES += sctp_hello
>  TEST_GEN_FILES += csum
>  TEST_GEN_FILES += nat6to4.o
> +TEST_GEN_FILES += xdp_dummy.o
>  TEST_GEN_FILES += ip_local_port_range
>  TEST_GEN_FILES += bind_wildcard
>  TEST_PROGS += test_vxlan_mdb.sh
> @@ -104,7 +105,7 @@ $(OUTPUT)/tcp_inq: LDLIBS += -lpthread
>  $(OUTPUT)/bind_bhash: LDLIBS += -lpthread
>  $(OUTPUT)/io_uring_zerocopy_tx: CFLAGS += -I../../../include/
>  
> -# Rules to generate bpf obj nat6to4.o
> +# Rules to generate bpf objs
>  CLANG ?= clang
>  SCRATCH_DIR := $(OUTPUT)/tools
>  BUILD_DIR := $(SCRATCH_DIR)/build
> @@ -139,7 +140,7 @@ endif
>  
>  CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
>  
> -$(OUTPUT)/nat6to4.o: nat6to4.c $(BPFOBJ) | $(MAKE_DIRS)
> +$(OUTPUT)/nat6to4.o $(OUTPUT)/xdp_dummy.o: $(OUTPUT)/%.o : %.c $(BPFOBJ) | $(MAKE_DIRS)
>  	$(CLANG) -O2 --target=bpf -c $< $(CCINCLUDE) $(CLANG_SYS_INCLUDES) -o $@

is the "$(OUTPUT)/%.o :" intentional or a leftover from editing?