Re: [PATCH bpf-next v4 1/2] bpf: add CHECKSUM_COMPLETE to bpf test progs

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On 6/13/24 1:18 PM, Vadim Fedorenko wrote:
On 12/06/2024 15:49, Jakub Kicinski wrote:
On Thu, 6 Jun 2024 07:58:50 -0700 Vadim Fedorenko wrote:
@@ -1060,9 +1062,19 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
          __skb_push(skb, hh_len);
      if (is_direct_pkt_access)
          bpf_compute_data_pointers(skb);
+
      ret = convert___skb_to_skb(skb, ctx);
      if (ret)
          goto out;
+
+    if (kattr->test.flags & BPF_F_TEST_SKB_CHECKSUM_COMPLETE) {
+        const int off = skb_network_offset(skb);
+        int len = skb->len - off;
+
+        skb->csum = skb_checksum(skb, off, len, 0);
+        skb->ip_summed = CHECKSUM_COMPLETE;
+    }

Looks good, overall, although I'd be tempted to place this before
the L2 is pushed, a few lines up, so that we don't need to worry
about network offset. Then again, with you approach there is a nice
symmetry between the pre- and post- if blocks so either way is fine:

Reviewed-by: Jakub Kicinski <kuba@xxxxxxxxxx>

Could you please take a look and merge the series?

Looks good, done now, thanks Vadim!




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