ib_ud_header_pack(9)

💅 ib_ud_header_pack — the kernel API manual, bestie edition ✨

okay so real talk, we're in the Kernel API Manual today and the star of the show is ib_ud_header_pack(9). she's giving "quiet function that does exactly one thing and does it flawlessly" energy. main character, honestly. 🎀

---

✨ NAME ✨

ib_ud_header_pack — packs the UD header struct into wire format. that's it. that's the whole vibe. 🦋

---

🌸 SYNOPSIS 🌸

int ib_ud_header_pack (struct ib_ud_header *header , void *buf );

like, look at her. two args, returns an int, no drama. iykyk. 💅

---

🫶 ARGUMENTS 🫶

• header — the UD header struct itself. the actual content, the moment, the whole point. 💖
• buf — the buffer you're packing into. this is where everything gets written, so like… make sure it's real and it's big enough, obviously. 🙈

---

🔥 DESCRIPTION 🔥

so ib_ud_header_pack takes the UD header structure header and packs it into wire format inside the buffer buf. no cap, that's literally the entire job. she takes the struct, she does the wire-format glow-up, she puts it in buf, done. iconic behaviour. ✨

it's giving "i don't need a whole personality, i need one (1) responsibility and flawless execution." and honestly? obsessed. 👑

---

👑 SEE ALSO 👑

• the kernel file ./drivers/infiniband/core/ud_header.c — go read the source bestie, it's right there 🌈
• ib_ud_header_init(9) — the init counterpart, the prequel, the origin story 🧚

---

ngl this page is short but she ate. no filler, just facts. 💯

---

and that's the whole page! brought to you by the fine folks over at ./drivers/infiniband/core, dated October 2026 — mwah, love that for us 💜⭐ 🍓