ixgbe_devlink_nvm_snapshot(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ixgbe_devlink_nvm_snapshot(9) — like, the whole Kernel API Manual page, but make it make sense

okay so bestie, this is a page straight out of the Kernel API Manual, and the star of the show is ixgbe_devlink_nvm_snapshot(9). yes it's a mouthful. no you don't have to say it out loud. let's get into it 💖

✨ NAME ✨

ixgbe_devlink_nvm_snapshot — Capture a snapshot of the NVM content 🎀

like, it takes a pic of your NVM. that's the whole vibe. iconic behavior honestly.

🌸 SYNOPSIS 🌸

int ixgbe_devlink_nvm_snapshot (struct devlink *devlink , const struct
       devlink_region_ops *ops , struct netlink_ext_ack *extack , u8 **data );

four args, one int coming back at you. she's giving "small function, big responsibility" energy fr fr 😭

🦋 ARGUMENTS 🦋

so here's the friend group, one by one:

  • devlink — the devlink instance itself. the main character of this whole situation 👑
  • ops — the devlink region being snapshotted. the specific region, like the specific friend in the group chat 💅
  • extack — the extended ACK response structure. yes it's real, no it's not a typo, it's literally called extack 🫶
  • data — on exit, this points to the snapshot data buffer. so like, it's empty-ish going in and it's holding the bag coming out ✨

💜 DESCRIPTION 💜

bestie. listen. this function is called in response to the DEVLINK_CMD_REGION_NEW cmd. that's the trigger. that's the bat signal 🦋

what it does: it captures a snapshot of the whole requested NVM region. the entire thing. not a lil peek, not a sample — the whole region, no cap 🔥

and here's the bestie part: no need to worry with freeing data — devlink core takes care of it. so like, do NOT go freeing that buffer yourself, that's not your job, that's devlink core's job and she's got it handled 🙈💖

⭐ RETURN ⭐

the return value tea, in order:

  • 0 on success — slay, we did it 🎀
  • -EOPNOTSUPP for unsupported regions — like, she can't, she won't 💀
  • -EBUSY when it cannot lock NVM — busy busy busy, try again later 🐝
  • -ENOMEM when it cannot alloc mem — the memory's gone, it's giving broke 😭
  • -EIO when an error occurs during reading — the read did NOT eat, I fear 🌸
fr fr memorize these, they're literally the whole diagnostic story. each one maps to exactly one situation, no guessing.

🌈 SEE ALSO 🌈

go read these next, bestie, the lore is deep:

(the init and destroy ones are literally the setup-and-teardown girlies. love a full lifecycle 💜)

and that's the page!! source is ./drivers/net/ethernet/intel/i... (yes the manpage footer literally truncates it with dots, we're keeping it exactly like that 🎀), dated October 2026, and it's ixgbe_devlink_nvm_snapshot(9) in the Kernel API Manual — periodt, go snapshot some NVM responsibly 💅✨

📦 where this page comes from