bpf, docs: Better scale maintenance of BPF subsystem
The BPF subsystem consists of a large number of pieces. There is not a single person that understands it all. Yet reviews are crucially important for the BPF community to provide productive quality feedback to contributors in a timely manner and therefore to ultimately expand the number of active developers in the community. So far, the BPF community had a two-stage review system, that is, a weekly rotation among 7 developers (Alexei, Daniel, Andrii, Martin, Song, Yonghong, John) as a first-level review of all inbound patches accompanied by a BPF CI system which runs the in-tree BPF selftests to check for regressions for every new patch, and then, a final check by Alexei, Daniel, Andrii to apply the patches to either bpf or bpf-next trees. This system worked well for the last ~3.5 years, but clearly reaches its limits these days as it does not scale enough. Especially, as we also need to allow enough room for every developer to contribute patches themselves, integrate with their day to day job, and in particular avoid burnout. We want to better scale both horizontally and vertically going forward. On the horizontal scale, we are adding more developers (KP, Stan, Hao, Jiri) to the overall core reviewer team, thus growing to 11 people in total. The weekly rotation for the horizontal oncall reviewer is shortened to 1/2 week (Mo - Wed and Thur - Fri). Instead of just patches, the coverage however extends also generally to triage and reply to mailing list traffic (e.g. RFCs, questions, etc). On the vertical scale, there is clearly a need for deep expertise areas to assign dedicated maintainer/reviewer teams that are responsible for code reviews and help with design of individual building blocks. To some degree we have been doing this implicitly, but the point is to formalize the teams and commitment. There is an overlap between areas and boundaries are intentionally grey. These additional entries provide a guidance on who has to look at the patches. The patch series which span multiple areas will be looked at by multiple people. The vertical review with areas of deep expertise are bundled at the same time with the horizontal side. This patch cleans up a bit the BPF entries, adds mentioned developers to the horizontal scale and creates new sub-entries with teams for developers committing to the above outlined vertical scale. Also, pw.git tools we use for BPF tree maintenance have been updated with a new pw-schedule script to semi-automate vertical oncall review rotation. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <martin.lau@linux.dev> Acked-by: Song Liu <song@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Mykola Lysenko <mykolal@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Acked-by: KP Singh <kpsingh@kernel.org> Acked-by: Stanislav Fomichev <sdf@google.com> Acked-by: Hao Luo <haoluo@google.com> Acked-by: Quentin Monnet <quentin@isovalent.com> Link: https://git.kernel.org/pub/scm/linux/kernel/git/dborkman/pw.git Link: https://lore.kernel.org/bpf/5bdc73e7f5a087299589944fa074563cdf2c2c1a.1656353995.git.daniel@iogearbox.net
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Коммит
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MAINTAINERS
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MAINTAINERS
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@ -3614,16 +3614,18 @@ S: Maintained
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F: Documentation/devicetree/bindings/iio/accel/bosch,bma400.yaml
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F: drivers/iio/accel/bma400*
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BPF (Safe dynamic programs and tools)
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BPF [GENERAL] (Safe Dynamic Programs and Tools)
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M: Alexei Starovoitov <ast@kernel.org>
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M: Daniel Borkmann <daniel@iogearbox.net>
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M: Andrii Nakryiko <andrii@kernel.org>
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R: Martin KaFai Lau <kafai@fb.com>
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R: Song Liu <songliubraving@fb.com>
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R: Martin KaFai Lau <martin.lau@linux.dev>
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R: Song Liu <song@kernel.org>
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R: Yonghong Song <yhs@fb.com>
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R: John Fastabend <john.fastabend@gmail.com>
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R: KP Singh <kpsingh@kernel.org>
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L: netdev@vger.kernel.org
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R: Stanislav Fomichev <sdf@google.com>
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R: Hao Luo <haoluo@google.com>
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R: Jiri Olsa <jolsa@kernel.org>
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L: bpf@vger.kernel.org
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S: Supported
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W: https://bpf.io/
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@ -3655,12 +3657,9 @@ F: scripts/pahole-version.sh
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F: tools/bpf/
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F: tools/lib/bpf/
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F: tools/testing/selftests/bpf/
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N: bpf
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K: bpf
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BPF JIT for ARM
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M: Shubham Bansal <illusionist.neo@gmail.com>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Odd Fixes
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F: arch/arm/net/
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@ -3669,7 +3668,6 @@ BPF JIT for ARM64
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M: Daniel Borkmann <daniel@iogearbox.net>
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M: Alexei Starovoitov <ast@kernel.org>
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M: Zi Shen Lim <zlim.lnx@gmail.com>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Supported
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F: arch/arm64/net/
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@ -3677,14 +3675,12 @@ F: arch/arm64/net/
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BPF JIT for MIPS (32-BIT AND 64-BIT)
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M: Johan Almbladh <johan.almbladh@anyfinetworks.com>
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M: Paul Burton <paulburton@kernel.org>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Maintained
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F: arch/mips/net/
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BPF JIT for NFP NICs
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M: Jakub Kicinski <kuba@kernel.org>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Odd Fixes
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F: drivers/net/ethernet/netronome/nfp/bpf/
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@ -3692,7 +3688,6 @@ F: drivers/net/ethernet/netronome/nfp/bpf/
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BPF JIT for POWERPC (32-BIT AND 64-BIT)
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M: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
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M: Michael Ellerman <mpe@ellerman.id.au>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Supported
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F: arch/powerpc/net/
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@ -3700,7 +3695,6 @@ F: arch/powerpc/net/
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BPF JIT for RISC-V (32-bit)
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M: Luke Nelson <luke.r.nels@gmail.com>
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M: Xi Wang <xi.wang@gmail.com>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Maintained
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F: arch/riscv/net/
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@ -3708,7 +3702,6 @@ X: arch/riscv/net/bpf_jit_comp64.c
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BPF JIT for RISC-V (64-bit)
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M: Björn Töpel <bjorn@kernel.org>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Maintained
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F: arch/riscv/net/
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@ -3718,7 +3711,6 @@ BPF JIT for S390
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M: Ilya Leoshkevich <iii@linux.ibm.com>
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M: Heiko Carstens <hca@linux.ibm.com>
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M: Vasily Gorbik <gor@linux.ibm.com>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Supported
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F: arch/s390/net/
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@ -3726,14 +3718,12 @@ X: arch/s390/net/pnet.c
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BPF JIT for SPARC (32-BIT AND 64-BIT)
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M: David S. Miller <davem@davemloft.net>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Odd Fixes
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F: arch/sparc/net/
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BPF JIT for X86 32-BIT
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M: Wang YanQing <udknight@gmail.com>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Odd Fixes
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F: arch/x86/net/bpf_jit_comp32.c
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@ -3741,13 +3731,60 @@ F: arch/x86/net/bpf_jit_comp32.c
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BPF JIT for X86 64-BIT
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M: Alexei Starovoitov <ast@kernel.org>
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M: Daniel Borkmann <daniel@iogearbox.net>
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L: netdev@vger.kernel.org
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L: bpf@vger.kernel.org
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S: Supported
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F: arch/x86/net/
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X: arch/x86/net/bpf_jit_comp32.c
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BPF LSM (Security Audit and Enforcement using BPF)
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BPF [CORE]
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M: Alexei Starovoitov <ast@kernel.org>
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M: Daniel Borkmann <daniel@iogearbox.net>
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R: John Fastabend <john.fastabend@gmail.com>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/verifier.c
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F: kernel/bpf/tnum.c
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F: kernel/bpf/core.c
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F: kernel/bpf/syscall.c
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F: kernel/bpf/dispatcher.c
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F: kernel/bpf/trampoline.c
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F: include/linux/bpf*
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F: include/linux/filter.h
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BPF [BTF]
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M: Martin KaFai Lau <martin.lau@linux.dev>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/btf.c
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F: include/linux/btf*
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BPF [TRACING]
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M: Song Liu <song@kernel.org>
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R: Jiri Olsa <jolsa@kernel.org>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/trace/bpf_trace.c
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F: kernel/bpf/stackmap.c
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BPF [NETWORKING] (tc BPF, sock_addr)
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M: Martin KaFai Lau <martin.lau@linux.dev>
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M: Daniel Borkmann <daniel@iogearbox.net>
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R: John Fastabend <john.fastabend@gmail.com>
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L: bpf@vger.kernel.org
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L: netdev@vger.kernel.org
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S: Maintained
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F: net/core/filter.c
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F: net/sched/act_bpf.c
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F: net/sched/cls_bpf.c
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BPF [NETWORKING] (struct_ops, reuseport)
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M: Martin KaFai Lau <martin.lau@linux.dev>
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L: bpf@vger.kernel.org
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L: netdev@vger.kernel.org
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S: Maintained
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F: kernel/bpf/bpf_struct*
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BPF [SECURITY & LSM] (Security Audit and Enforcement using BPF)
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M: KP Singh <kpsingh@kernel.org>
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R: Florent Revest <revest@chromium.org>
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R: Brendan Jackman <jackmanb@chromium.org>
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@ -3758,7 +3795,27 @@ F: include/linux/bpf_lsm.h
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F: kernel/bpf/bpf_lsm.c
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F: security/bpf/
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BPF L7 FRAMEWORK
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BPF [STORAGE & CGROUPS]
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M: Martin KaFai Lau <martin.lau@linux.dev>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/cgroup.c
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F: kernel/bpf/*storage.c
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F: kernel/bpf/bpf_lru*
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BPF [RINGBUF]
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M: Andrii Nakryiko <andrii@kernel.org>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/ringbuf.c
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BPF [ITERATOR]
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M: Yonghong Song <yhs@fb.com>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/*iter.c
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BPF [L7 FRAMEWORK] (sockmap)
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M: John Fastabend <john.fastabend@gmail.com>
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M: Jakub Sitnicki <jakub@cloudflare.com>
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L: netdev@vger.kernel.org
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@ -3771,13 +3828,31 @@ F: net/ipv4/tcp_bpf.c
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F: net/ipv4/udp_bpf.c
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F: net/unix/unix_bpf.c
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BPFTOOL
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BPF [LIBRARY] (libbpf)
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M: Andrii Nakryiko <andrii@kernel.org>
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L: bpf@vger.kernel.org
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S: Maintained
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F: tools/lib/bpf/
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BPF [TOOLING] (bpftool)
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M: Quentin Monnet <quentin@isovalent.com>
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L: bpf@vger.kernel.org
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S: Maintained
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F: kernel/bpf/disasm.*
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F: tools/bpf/bpftool/
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BPF [SELFTESTS] (Test Runners & Infrastructure)
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M: Andrii Nakryiko <andrii@kernel.org>
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R: Mykola Lysenko <mykolal@fb.com>
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L: bpf@vger.kernel.org
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S: Maintained
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F: tools/testing/selftests/bpf/
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BPF [MISC]
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L: bpf@vger.kernel.org
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S: Odd Fixes
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K: (?:\b|_)bpf(?:\b|_)
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BROADCOM B44 10/100 ETHERNET DRIVER
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M: Michael Chan <michael.chan@broadcom.com>
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L: netdev@vger.kernel.org
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