xenbus_switch_state(9)

🌸 NAME 🌸

Okay so bestie, welcome to the xenbus_switch_state(9) page from the Kernel API Manual ✨ — and the whole mood is: save the new state of a driver 💅. That's literally the function's job, no cap.

---

🦋 SYNOPSIS 🦋

int xenbus_switch_state (struct xenbus_device *dev , enum xenbus_state
state );

---

🎀 ARGUMENTS 🎀

• dev — the xenbus device 👑
• state — the new state we're switching to, periodt 💫

---

💖 DESCRIPTION 💖

So what this does is advertise in the store that the given driver is changing to the given new_state 🫶. That's the main character move.

And if something goes wrong? On error, the device will switch to XenbusStateClosing, and the error will be saved in the store 😭. Like, the store keeps the receipts, fr fr.

---

⭐ RETURN ⭐

You get 0 on success, or -errno on error. Slay when it's 0, sigh when it's -errno 💀.

---

🌈 SEE ALSO 🌈

Kernel file ./drivers/xen/xenbus/xenbus_client.c is the spot 👀 — then go peek at these besties:

• xenbus_watch_path(9)
• xenbus_watch_pathfmt(9)
• xenbus_dev_error(9)
• xenbus_dev_fatal(9)
• xenbus_map_ring_valloc(9)
• xenbus_unmap_ring(9)
• xenbus_unmap_ring_vfree(9)
• xenbus_read_driver_state(9)

---

Mwah 💋 this little icon lives under ./drivers/xen/xenbus, got stamped October 2026, and it's forever the xenbus_switch_state(9) page — bye bestie, go switch some states responsibly 🧚💜