linux-dev/kernel/bpf/preload/iterators, branch master

bpf: iterators: Build and use lightweight bootstrap version of bpftool

2022-07-15T19:01:30Z

kernel/bpf/preload/iterators 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/20220714024612.944071-4-pulehui@huawei.com

bpf: Convert bpf_preload.ko to use light skeleton.

2022-02-10T22:31:51Z

The main change is a move of the single line #include "iterators.lskel.h" from iterators/iterators.c to bpf_preload_kern.c. Which means that generated light skeleton can be used from user space or user mode driver like iterators.c or from the kernel module or the kernel itself. The direct use of light skeleton from the kernel module simplifies the code, since UMD is no longer necessary. The libbpf.a required user space and UMD. The CO-RE in the kernel and generated "loader bpf program" used by the light skeleton are capable to perform complex loading operations traditionally provided by libbpf. In addition UMD approach was launching UMD process every time bpffs has to be mounted. With light skeleton in the kernel the bpf_preload kernel module loads bpf iterators once and pins them multiple times into different bpffs mounts. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220209232001.27490-6-alexei.starovoitov@gmail.com

bpf: Update iterators.lskel.h.

2022-02-10T22:31:51Z

Light skeleton and skel_internal.h have changed. Update iterators.lskel.h. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20220209232001.27490-5-alexei.starovoitov@gmail.com

bpf: Open code obj_get_info_by_fd in bpf preload.

2022-02-01T22:56:18Z

Open code obj_get_info_by_fd in bpf preload. It's the last part of libbpf that preload/iterators were using. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20220131220528.98088-7-alexei.starovoitov@gmail.com

bpf: Convert bpf preload to light skeleton.

2022-02-01T22:56:18Z

Convert bpffs preload iterators to light skeleton. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20220131220528.98088-6-alexei.starovoitov@gmail.com

bpf: Remove unnecessary setrlimit from bpf preload.

2022-02-01T22:56:18Z

BPF programs and maps are memcg accounted. setrlimit is obsolete. Remove its use from bpf preload. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20220131220528.98088-5-alexei.starovoitov@gmail.com

bpftool: Add install-bin target to install binary only

2021-10-08T19:02:40Z

With "make install", bpftool installs its binary and its bash completion file. Usually, this is what we want. But a few components in the kernel repository (namely, BPF iterators and selftests) also install bpftool locally before using it. In such a case, bash completion is not necessary and is just a useless build artifact. Let's add an "install-bin" target to bpftool, to offer a way to install the binary only. Signed-off-by: Quentin Monnet Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211007194438.34443-13-quentin@isovalent.com

bpf: iterators: Install libbpf headers when building

2021-10-08T18:58:54Z

API headers from libbpf should not be accessed directly from the library's source directory. Instead, they should be exported with "make install_headers". Let's make sure that bpf/preload/iterators/Makefile installs the headers properly when building. Signed-off-by: Quentin Monnet Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211007194438.34443-8-quentin@isovalent.com

libbpf: Move BPF_SEQ_PRINTF and BPF_SNPRINTF to bpf_helpers.h

2021-05-26T17:45:41Z

These macros are convenient wrappers around the bpf_seq_printf and bpf_snprintf helpers. They are currently provided by bpf_tracing.h which targets low level tracing primitives. bpf_helpers.h is a better fit. The __bpf_narg and __bpf_apply are needed in both files and provided twice. __bpf_empty isn't used anywhere and is removed from bpf_tracing.h Reported-by: Andrii Nakryiko Signed-off-by: Florent Revest Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210526164643.2881368-1-revest@chromium.org

bpf: Remove unnecessary include from preload/iterators

2021-01-08T21:39:24Z

This program does not use argp (which is a glibcism). Instead include directly, which was pulled in by . Signed-off-by: Leah Neukirchen Signed-off-by: Daniel Borkmann Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20201216100306.30942-1-leah@vuxu.org Signed-off-by: Alexei Starovoitov