netdev_is_rx_handler_busy(9)

📦 version 7.3.1, in nixpkgs unstable

💅 netdev_is_rx_handler_busy — check if receive handler is registered ✨

okay so bestie, we're in the netdev_is_rx_handler_busy(9) page of the Kernel API Manual and honestly? it's giving "short but mighty". buckle up 🎀

🌸 SYNOPSIS 🌸

bool netdev_is_rx_handler_busy (struct net_device *dev );

🦋 ARGUMENTS 🦋

  • dev — the device you're checking, queen. that's the whole argument. slay 💅

✨ DESCRIPTION ✨

so the whole vibe here: this function checks whether a receive handler is already registered for a given device. if there's one in there, it hands you back true. no handler? no true. simple as that, no cap 🫶

⚠️ real talk though: the caller must hold the rtnl_mutex. this is not a suggestion, it's not a vibe check you can skip — hold the lock, bestie, or it's over for you 😭

👑 SEE ALSO 👑

the kernel file ./net/core/dev.c says hi, and the whole friend group showed up to the group chat — like, everyone. iconic behavior honestly 🌈

and that's the whole page, bestie — short, sweet, and fully locked behind rtnl_mutex 🔥

this little gem lives in ./net/core and the docs are stamped October 2026 — go forth and read it responsibly 💖✨🎀

📦 where this page comes from