bpf_cpumask_subset.md

title	description
KFunc 'bpf_cpumask_subset'	This page documents the 'bpf_cpumask_subset' eBPF kfunc, including its defintion, usage, program types that can use it, and examples.

KFunc bpf_cpumask_subset

:octicons-tag-24: v6.3

Check if a cpumask is a subset of another.

Definition

src1: The first cpumask being checked as a subset. src2: The second cpumask being checked as a superset.

Return:

• true - All of the bits of src1 are set in src2.
• false - At least one bit in src1 is not set in src2.

struct bpf_cpumask pointers may be safely passed to src1 and src2.

#!c bool bpf_cpumask_subset(const struct cpumask *src1, const struct cpumask *src2)

Usage

!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome

Program types

The following program types can make use of this kfunc:

• BPF_PROG_TYPE_LSM
• BPF_PROG_TYPE_STRUCT_OPS
• BPF_PROG_TYPE_TRACING

Example

!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome