linux.git/tools/bpf/runqslower, branch for-next

tools/bpf: Remove unused variable from runqslower

2024-10-04T00:47:35+00:00

This variable is never referenced in the code, just remove it.

Signed-off-by: Zhu Jun 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20240925100005.3989-1-zhujun2@cmss.chinamobile.com
Signed-off-by: Alexei Starovoitov

tools/runqslower: Fix LDFLAGS and add LDLIBS support

2024-07-29T22:05:05+00:00

Actually use previously defined LDFLAGS during build and add support for
LDLIBS to link extra standalone libraries e.g. 'argp' which is not provided
by musl libc.

Fixes: 585bf4640ebe ("tools: runqslower: Add EXTRA_CFLAGS and EXTRA_LDFLAGS support")
Signed-off-by: Tony Ambardar 
Signed-off-by: Andrii Nakryiko 
Acked-by: Ilya Leoshkevich 
Link: https://lore.kernel.org/bpf/20240723003045.2273499-1-tony.ambardar@gmail.com

bpf: Replace deprecated -target with --target= for Clang

2023-06-29T13:46:17+00:00

The -target option has been deprecated since clang 3.4 in 2013. Therefore, use
the preferred --target=bpf form instead. This also matches how we use --target=
in scripts/Makefile.clang.

Signed-off-by: Fangrui Song 
Signed-off-by: Daniel Borkmann 
Acked-by: Yonghong Song 
Acked-by: Quentin Monnet 
Link: https://github.com/llvm/llvm-project/commit/274b6f0c87a6a1798de0a68135afc7f95def6277
Link: https://lore.kernel.org/bpf/20230624001856.1903733-1-maskray@google.com

tools: runqslower: Add EXTRA_CFLAGS and EXTRA_LDFLAGS support

2023-02-10T23:21:26+00:00

This makes it possible to add sanitizer flags.

Signed-off-by: Ilya Leoshkevich 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20230210001210.395194-3-iii@linux.ibm.com

tools: runqslower: Build and use lightweight bootstrap version of bpftool

2022-07-15T19:01:30+00:00

tools/runqslower use bpftool for vmlinux.h, skeleton, and static linking
only. So we can use lightweight bootstrap version of bpftool to handle
these, and it will be faster.

Suggested-by: Andrii Nakryiko 
Signed-off-by: Pu Lehui 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20220714024612.944071-3-pulehui@huawei.com

tools/runqslower: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK

2022-04-11T03:17:16+00:00

Explicitly set libbpf 1.0 API mode, then we can avoid using the deprecated
RLIMIT_MEMLOCK.

Signed-off-by: Yafang Shao 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20220409125958.92629-5-laoar.shao@gmail.com

tools/bpf: Rename 'struct event' to avoid naming conflict

2022-01-15T01:21:25+00:00

On ppc64le, trying to build bpf seltests throws the below warning:
  In file included from runqslower.bpf.c:5:
  ./runqslower.h:7:8: error: redefinition of 'event'
  struct event {
	 ^
  /home/naveen/linux/tools/testing/selftests/bpf/tools/build/runqslower/vmlinux.h:156602:8:
  note: previous definition is here
  struct event {
	 ^

This happens since 'struct event' is defined in
drivers/net/ethernet/alteon/acenic.h . Rename the one in runqslower to a
more appropriate 'runq_event' to avoid the naming conflict.

Signed-off-by: Naveen N. Rao 
Acked-by: Daniel Borkmann 
Signed-off-by: Michael Ellerman 
Link: https://lore.kernel.org/r/c13cb3767d26257ca4387b8296b632b433a58db6.1641468127.git.naveen.n.rao@linux.vnet.ibm.com

tools/runqslower: Enable cross-building with clang

2021-12-16T20:15:05+00:00

Cross-building using clang requires passing the "-target" flag rather
than using the CROSS_COMPILE prefix. Makefile.include transforms
CROSS_COMPILE into CLANG_CROSS_FLAGS. Add them to CFLAGS, and erase
CROSS_COMPILE for the bpftool build, since it needs to be executed on
the host.

Signed-off-by: Jean-Philippe Brucker 
Signed-off-by: Andrii Nakryiko 
Acked-by: Quentin Monnet 
Link: https://lore.kernel.org/bpf/20211216163842.829836-6-jean-philippe@linaro.org

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2021-11-18T21:13:16+00:00

Signed-off-by: Jakub Kicinski

tools/runqslower: Fix cross-build

2021-11-13T01:23:16+00:00

Commit be79505caf3f ("tools/runqslower: Install libbpf headers when
building") uses the target libbpf to build the host bpftool, which
doesn't work when cross-building:

  make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -C tools/bpf/runqslower O=/tmp/runqslower
  ...
    LINK    /tmp/runqslower/bpftool/bpftool
  /usr/bin/ld: /tmp/runqslower/libbpf/libbpf.a(libbpf-in.o): Relocations in generic ELF (EM: 183)
  /usr/bin/ld: /tmp/runqslower/libbpf/libbpf.a: error adding symbols: file in wrong format
  collect2: error: ld returned 1 exit status

When cross-building, the target architecture differs from the host. The
bpftool used for building runqslower is executed on the host, and thus
must use a different libbpf than that used for runqslower itself.
Remove the LIBBPF_OUTPUT and LIBBPF_DESTDIR parameters, so the bpftool
build makes its own library if necessary.

In the selftests, pass the host bpftool, already a prerequisite for the
runqslower recipe, as BPFTOOL_OUTPUT. The runqslower Makefile will use
the bpftool that's already built for selftests instead of making a new
one.

Fixes: be79505caf3f ("tools/runqslower: Install libbpf headers when building")
Signed-off-by: Jean-Philippe Brucker 
Signed-off-by: Daniel Borkmann 
Reviewed-by: Quentin Monnet 
Link: https://lore.kernel.org/bpf/20211112155128.565680-1-jean-philippe@linaro.org
Signed-off-by: Alexei Starovoitov