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probe: raw_tp: fix cookie support detection #562

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Merged
merged 1 commit into from
Aug 25, 2025
Merged

probe: raw_tp: fix cookie support detection #562

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13 changes: 10 additions & 3 deletions retis/src/core/probe/kernel/raw_tracepoint.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -95,13 +95,20 @@ impl<'a> ProbeBuilder for RawTracepointBuilder<'a> {

impl<'a> RawTracepointBuilder<'a> {
// Checks whether the underlying kernel supports setting/retrieving cookies
// in raw tracepoints.
// in raw tracepoints. We both check the availability of the get cookie API
// as well as the cookie support itself, as the two are part of unrelated
// commits that could be backported separately.
fn cookie_support() -> Result<bool> {
Ok(inspect::inspector()?
let get_cookie = inspect::inspector()?
.kernel
.btf
.resolve_types_by_name("bpf_get_attach_cookie_tracing")
.is_ok())
.is_ok();
let raw_tp_cookie = inspect::parse_struct("bpf_raw_tp_link")?
.iter()
.any(|field| field == "cookie");

Ok(get_cookie && raw_tp_cookie)
}

fn init_skel(
Expand Down