sfp_get_name(9)

📦 version 7.3.1, in nixpkgs unstable

✨ sfp_get_name ✨

okay so bestie, this is a page from the Kernel API Manual — yes, the kernel kernel, the big one 💅 — and it's all about one teeny tiny function that tells you the name of your SFP device. it's giving "small but iconic", fr fr.

🌸 NAME 🌸

sfp_get_name — Get the SFP device name 🎀

like, literally that's the whole job. it gets the name. and it does it so well.

✨ SYNOPSIS ✨

const char * sfp_get_name (struct sfp_bus *bus );

that's it. one function, one arg, one const char * coming back at you. no cap. 🫶

🦋 ARGUMENTS 🦋

  • bus — a pointer to the struct sfp_bus structure for the sfp module. basically the little handle that says "hey, this is the bus we're talking about" 💖

💜 DESCRIPTION 💜

so the way that this works is: sfp_get_name gets the SFP device's name, if bus has a registered socket. that "if" is doing a lot of heavy lifting there, so pay attention 👑

⚠️ okay important part, don't skip this — callers must hold RTNL. that's not a suggestion, that's the rules. and the returned name is only valid until RTNL is released. so like... grab it, use it, don't get attached. it is not yours forever. 😭

🌈 RETURN 🌈

  • the name of the SFP device registered with sfp_register_socket ✨
  • NULL if no device was registered on bus 💀

so either you get a name or you get nothing. vibe check either way. 🍓

🧚 SEE ALSO 🧚

the kernel file ./drivers/net/phy/sfp-bus.c and these absolute legends of the SFP universe:

okay that's a whole friend group right there and honestly? obsessed. go read them too, iykyk 💅

🎀 sign-off 🎀

this little gem lives in ./drivers/net/phy, and it's dated October 2026 ⭐ — so yeah, mark your calendars bestie. mwah, go hold RTNL and stay safe out there 💖🔥👑🙈

📦 where this page comes from