Hi -
Is there any interest in a repo or something for reusable BPF code bits?
I've got some stuff that I do in my programs that might be useful to
others, but not to the level of a full bpf helper.
For instance, one technique I've developed is to have list-like data
structures for *mmappable* data that are e.g. per-cpu and per-task.
Internally, it's an Array map, and each element is identified by its
index in the array instead of by point. And the linked-list is built
with index integers instead of pointers.
Anyway, that's just an example, and I imagine other people have their
own techniques. I've got the code sitting in an open-source repo
elsewhere, and had a couple people off-list ask me about it. I could
email it to the list, but it'd get lost in the noise.
If you're curious about specifics, the linked list code is here [1], and
I briefly mentioned the data structures in my LPC 22 talk [2]. I've got
an AVL tree that works with this stuff too.
Thanks,
Barret
[1] https://github.com/google/ghost-userspace/blob/main/lib/queue.bpf.h
[2]
https://lpc.events/event/16/contributions/1365/attachments/986/1912/lpc22-ebpf-kernel-scheduling-with-ghost.pdf
