e1000e_hwtstamp_set(9)

📦 version 7.3.1, in nixpkgs unstable

💅 e1000e_hwtstamp_set(9)

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for e1000e_hwtstamp_set, and honestly? it's giving "small function, big responsibilities." let's get into it 🫶

✨ NAME ✨

e1000e_hwtstamp_set — control hardware time stamping ⏱️💖

🌸 SYNOPSIS 🌸

int e1000e_hwtstamp_set (struct net_device *netdev , struct
       kernel_hwtstamp_config *config , struct netlink_ext_ack *extack );

like yeah that's the whole signature, no cap. three args, one int coming back atcha 💫

🎀 ARGUMENTS 🎀

  • netdev — the network interface device structure 🦋 (yes, the whole device, she's the main character here)
  • config — the timestamp configuration 👑 (this is the vibe check for what you actually want stamped)
  • extack — the netlink extended ACK report 💌 (where the receipts go if something goes sideways)

🔥 DESCRIPTION 🔥

okay so, outgoing time stamping: you can enable it and you can disable it. and listen — play nice and disable it when requested, bestie 🙏 even though it shouldn't cause any overhead when no packet actually needs it. like, it's polite. it costs nothing. be that girl.

at most one packet in the queue may be marked for time stamping — and this is a hard limit, fr fr. why? because otherwise it would be impossible to tell for sure which packet the hardware time stamp belongs to 😭 like imagine two packets both claiming the stamp, chaos, drama, absolutely not.

now for incoming time stamping — that one has to be configured via the hardware filters 🧚 no shortcuts, the filters are the moment.

and here's the fine print: not all combinations are supported. in particular, event type has to be specified — no event type, no service 💅

matching the kind of event packet? yeah, that's not supported 🙈 with exactly one exception: "all V2 events regardless of level 2 or 4" — that one slays, that one works 🌈⭐

ngl, read the constraints twice. "not all combinations are supported" is doing a lot of heavy lifting in that sentence 💀

🔮 SEE ALSO 🔮

like okay that's a lot of friends but they're all real and they're all in the list, no skips, we don't do that here 🫶

and that's the page!! mwah 💋 this gem ships from the Kernel API Manual, source file ./drivers/net/ethernet/intel/e..., dated October 2026 🗓️✨ go forth and stamp responsibly, bestie 🦋💖🌸

📦 where this page comes from