i40e_open(9)

📦 version 7.3.1, in nixpkgs unstable

💅 i40e_open — the Kernel API Manual, section 9, but make it make sense

okay so bestie, buckle up 🎀 we're looking at a page straight out of the Kernel API Manual, and honestly? it's short, it's sweet, and it's doing exactly one (1) thing. let's get into it ✨

🌸 NAME

i40e_open — literally just: called when a network interface is made active. that's the whole job description, and she's thriving 💅

🦋 SYNOPSIS

int i40e_open (struct net_device *netdev );

that's it. one function, one argument, returns an int. minimal, iconic, no notes 👑

✨ ARGUMENTS

  • netdev — the network interface device structure. that's the one thing you hand her 🫶

💖 DESCRIPTION

okay so picture this: the system decides to bring a network interface up — that's IFF_UP, bestie — and this is the function that gets called. she's the open entry point, the "we're going live" moment, the main character walking in slow-mo 🔥

and the way she does it? she sets up everything. at this point all the resources needed for transmit and receive operations get allocated, the interrupt handler gets registered with the OS, the netdev watchdog subtask gets enabled, and the stack gets notified that the interface is ready. like, she's doing the whole group project by herself and ngl she's eating 💀✨

and the return values, iykyk:

  • 0 on success — slay, we're up 🌈
  • a negative value on failure — something went sideways, go check it 😭
real talk though: those are the only two outcomes documented here, so don't go inventing a third one, bestie 🫶

👑 SEE ALSO

first up, the kernel file itself — go touch some source, it's good for you:

  • Kernel file ./drivers/net/ethernet/intel/i40e/i40e_main.c

and now the absolutely enormous friend group. yes, all of them. every single one. no cap, we're not skipping anybody 💀

and that's the whole page, bestie 🫶 if you made it through that entire SEE ALSO list without scrolling past it, you're genuinely built different 💜

ok final sign-off time 🎀 this little beauty lives under ./drivers/net/ethernet/intel/i40e, it's dated October 2026, and it ships in the Kernel API Manual — go be iconic with your NICs ✨💅
📦 where this page comes from