Re: [RFC PATCH net-next 0/6] seccomp filter JIT

[Xi Wang]

On Fri, Apr 26, 2013 at 7:46 AM, Daniel Borkmann <dborkman@xxxxxxxxxx> wrote:
> I think BPF JIT for seccomp on ARM recently got applied to -mm tree
> if I'm not mistaken. It was from Nicolas Schichan (cc):
>
> http://thread.gmane.org/gmane.linux.ports.arm.kernel/233416/

Thanks for the pointer.

For the ARM part, looks like Nicolas's patch requires to implement two
wrappers for each arch:

  void seccomp_jit_compile(struct seccomp_filter *fp);
  void seccomp_jit_free(struct seccomp_filter *fp);

The implementation of these wrappers is almost identical to:

  void bpf_jit_compile(struct sk_filter *fp);
  void bpf_jit_free(struct sk_filter *fp);

While this patch uses a unified interface for both packet & seccomp filters.

  bpf_func_t bpf_jit_compile(struct sock_filter *filter, unsigned int flen);
  void bpf_jit_free(bpf_func_t bpf_func);

Shouldn't be hard to merge though.

- xi
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