tb_tunnel_is_active(9)

✨ tb_tunnel_is_active ✨

okay so bestie, welcome to the Kernel API Manual 💅 this little cutie lives in section 9 (that's the kernel API section, iykyk) and it's here to answer one very important question: is this tunnel fully activated or not? 🎀

---

🌸 NAME 🌸

tb_tunnel_is_active — is tunnel fully activated 👑

---

🦋 SYNOPSIS 🦋

bool tb_tunnel_is_active (const struct tb_tunnel *tunnel );

---

💖 ARGUMENTS 💖

• tunnel — the tunnel to check 🔍 like literally just hand over the tunnel and we'll vibe check it for you

---

⭐ RETURN ⭐

Returns true if the tunnel is fully activated. That's it, that's the answer ✨

---

🌈 DESCRIPTION 🌈

okay so here's the tea ☕ — for DP tunnels, this function returns true only once the DPRX capabilities read has been issued successfully. So like, don't come for her before that happens, she's not ready yet 🙈

For other tunnels though? She returns true pretty much once tb_tunnel_activate returns successfully. Easy peasy, no cap 💅

---

🫶 SEE ALSO 🫶

• Kernel file ./drivers/thunderbolt/tunnel.h — go read it bestie, it's giving lore 📖
• enum tb_tunnel_state(9)
• struct tb_tunnel(9)
• enum tb_tunnel_event(9)

---

and that's the whole page, bestie!! 💖 no notes, she ate and left no crumbs 👑

signing off from ./drivers/thunderbolt — this iconic little file was brought to you October 2026 vibes, page tb_tunnel_is_active(9), Kernel API Manual energy all the way 🦋✨🎀