bpf: Add BPF_F_CPU and BPF_F_ALL_CPUS flags support for percpu_cgroup_storage maps

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Introduce BPF_F_ALL_CPUS flag support for percpu_cgroup_storage maps to
allow updating values for all CPUs with a single value for update_elem
API.

Introduce BPF_F_CPU flag support for percpu_cgroup_storage maps to
allow:

* update value for specified CPU for update_elem API.
* lookup value for specified CPU for lookup_elem API.

The BPF_F_CPU flag is passed via map_flags along with embedded cpu info.

Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20260107022022.12843-6-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Leon Hwang 2026-01-07 10:20:20 +08:00 • committed by Alexei Starovoitov

parent 8526397c3c

commit 47c79f05aa

4 changed files with 22 additions and 8 deletions

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4

include/linux/bpf-cgroup.h

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1

include/linux/bpf.h

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23

kernel/bpf/local_storage.c

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2

kernel/bpf/syscall.c

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