switchdev_port_attr_set(9)

📦 version 7.3.1, in nixpkgs unstable

💅 switchdev_port_attr_set(9) 💅

Okay bestie, welcome to the Kernel API Manual ✨ — this is the page for switchdev_port_attr_set, and yes it's a function, yes it's in the kernel, and yes we're gonna get through it together 🫶

🌸 NAME 🌸

switchdev_port_attr_set — set a port attribute, that's literally the whole job, no cap 💅

🎀 SYNOPSIS 🎀

int switchdev_port_attr_set (struct net_device *dev , const struct
       switchdev_attr *attr , struct netlink_ext_ack *extack );

That's the whole signature, keep it exactly like that, don't be weird about it 🦋

✨ ARGUMENTS ✨

  • dev — the port device. the actual thing we're poking at 🎯
  • attr — the attribute you wanna set. like, the whole point of calling this fr fr
  • extack — the netlink extended ack. it's here purely so error messages can propagate back up the chain so you actually find out why things went sideways 😭

🔥 DESCRIPTION 🔥

Okay this is the part where you gotta pay attention, bestie, because it's a real rule and not a vibe:

rtnl_lock must be held, and you must not be in an atomic section — unless the SWITCHDEV_F_DEFER flag is set. that's the loophole, that's the exception, respect it 💀

Highkey important, lowkey easy to forget. Don't be that person 🙈

🦋 SEE ALSO 🦋

Kernel file ./net/switchdev/switchdev.c — and also go look at these icons 👑

That's the page!! 💖 This little gem lives in ./net/switchdev, dated October 2026, and the manual name is switchdev_port_attr_set(9) in case you forgot already 🧚 mwah, go set some attributes responsibly 👑⭐

📦 where this page comes from