Re: [PATCH v4 bpf-next 3/3] selftests/bpf: Add selftest for bpf_xdp_flow_lookup kfunc

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On 5/29/24 3:04 PM, Lorenzo Bianconi wrote:
Introduce e2e selftest for bpf_xdp_flow_lookup kfunc through
xdp_flowtable utility.

Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
[...]
+struct flow_offload_tuple_rhash *
+bpf_xdp_flow_lookup(struct xdp_md *, struct bpf_fib_lookup *,
+		    struct bpf_flowtable_opts___local *, u32) __ksym;

Btw, this fails CI build :

https://github.com/kernel-patches/bpf/actions/runs/9499749947/job/26190382116

  [...]
  progs/xdp_flowtable.c:20:1: error: conflicting types for 'bpf_xdp_flow_lookup'
     20 | bpf_xdp_flow_lookup(struct xdp_md *, struct bpf_fib_lookup *,
        | ^
  /tmp/work/bpf/bpf/tools/testing/selftests/bpf/tools/include/vmlinux.h:106755:41: note: previous declaration is here
   106755 | extern struct flow_offload_tuple_rhash *bpf_xdp_flow_lookup(struct xdp_md *ctx, struct bpf_fib_lookup *fib_tuple, struct bpf_flowtable_opts *opts, u32 opts_len) __weak __ksym;
          |                                         ^
  progs/xdp_flowtable.c:134:47: error: incompatible pointer types passing 'struct bpf_flowtable_opts___local *' to parameter of type 'struct bpf_flowtable_opts *' [-Werror,-Wincompatible-pointer-types]
    134 |         tuplehash = bpf_xdp_flow_lookup(ctx, &tuple, &opts, sizeof(opts));
        |                                                      ^~~~~
  /tmp/work/bpf/bpf/tools/testing/selftests/bpf/tools/include/vmlinux.h:106755:142: note: passing argument to parameter 'opts' here
   106755 | extern struct flow_offload_tuple_rhash *bpf_xdp_flow_lookup(struct xdp_md *ctx, struct bpf_fib_lookup *fib_tuple, struct bpf_flowtable_opts *opts, u32 opts_len) __weak __ksym;
          |                                                                                                                                              ^
  2 errors generated.
    CLNG-BPF [test_maps] kprobe_multi_override.bpf.o
    CLNG-BPF [test_maps] tailcall_bpf2bpf1.bpf.o
  make: *** [Makefile:654: /tmp/work/bpf/bpf/tools/testing/selftests/bpf/xdp_flowtable.bpf.o] Error 1
  make: *** Waiting for unfinished jobs....
  make: Leaving directory '/tmp/work/bpf/bpf/tools/testing/selftests/bpf'
  Error: Process completed with exit code 2.




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