tb_tunnel_activate(9)

📦 version 7.3.1, in nixpkgs unstable

✨ NAME ✨

okay so this is tb_tunnel_activate (from the Kernel API Manual, bestie, we're in the kernel docs now 💅) — it activates a tunnel. that's it. that's the whole vibe. it wakes the tunnel up and tells it to go be a tunnel 🦋

🌸 SYNOPSIS 🌸

int tb_tunnel_activate (struct tb_tunnel *tunnel );

like literally one function, one argument, returns an int, no cap ✨

🎀 ARGUMENTS 🎀

  • tunnel — the tunnel you want to activate. the main character. you hand it over and it gets activated 🫶

💖 RETURN 💖

so here's what you might get back, and yes you gotta check it:

  • 0 — on success 🎉 slay, the tunnel is activated, we love to see it
  • -EINPROGRESS — if the tunnel activation is still in progress. and before you panic, that's specifically for DP tunnels to complete the DPRX capabilities read 👀 so it's not a fail, it's a "girl give it a sec" 😭
  • Negative errno — another error occurred 💀 something else went wrong, negative errno is your sign to go look
ngl if you get -EINPROGRESS don't just sit there assuming it worked — that's the "still loading" of the kernel world bestie, keep an eye on it 💅

🦋 SEE ALSO 🦋

the whole friend group, all of them, in the kernel file ./drivers/thunderbolt/tunnel.c:

and that's the page bb 💜 lived in ./drivers/thunderbolt, dropped October 2026, and we are obsessed with her 🌈✨ go activate ur tunnels responsibly 🧚

📦 where this page comes from