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scx: Allow calling scx kfuncs from BPF_PROG_TYPE_SYSCALL #172

Merged
merged 2 commits into from
Apr 4, 2024
Merged

scx: Allow calling scx kfuncs from BPF_PROG_TYPE_SYSCALL #172

merged 2 commits into from
Apr 4, 2024

Commits on Apr 4, 2024

  1. scx: Allow calling scx kfuncs from BPF_PROG_TYPE_SYSCALL 

    We'll want to be able to issue BPF_PROG_RUN calls in order to
synchronously call into the kernel from user space scheduling
components. The most natural prog type for this seems to be
BPF_PROG_TYPE_SYSCALL, which is a very safe program type. Let's allow
invoking the core kfuncs from this program type as well.

Signed-off-by: David Vernet <[email protected]>
    @Byte-Lab
    Byte-Lab committed Apr 4, 2024
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  2. scx/selftest: Add testcase invoking a kfunc with BPF_PROG_RUN 

    Now that we can invoke scx kfuncs inside of a BPF_PROG_TYPE_SYSCALL
program, let's add some selftests that validate the behavior.

Signed-off-by: David Vernet <[email protected]>
    @Byte-Lab
    Byte-Lab committed Apr 4, 2024
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