Allow callers to create VariableSpecs #1882
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VariableSpec is the only component of CollectionSpec with unexported fields. This makes it awkward to use during testing outside of package ebpf. Fix this by exporting and documenting the fields of variable spec. To achieve this, VariableSpec.Set doesn't immediately copy data into MapSpec.Contents. Instead VariableSpec.Value holds the marshaled data. The collection loader ensures that VariableSpec.Value is copied into MapSpec.Contents before loading. A nice side-effect is that this ends up creating a lot less copies of MapSpec.Contents. Fixes: cilium#1868 Signed-off-by: Lorenz Bauer <[email protected]>
Using RewriteConstants currently enforces the presence of BTF, even though the code doesn't explicitly rely on it. Remove this restriciton. Signed-off-by: Lorenz Bauer <[email protected]>
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Fixes: #1868