build_hdr_descs_arr(9)

💖 build_hdr_descs_arr(9) — a Kernel API Manual moment 💖

okay bestie, welcome to the build_hdr_descs_arr(9) page, straight out of the Kernel API Manual ✨ this one's short and sweet and honestly? it slays.

---

🌸 NAME 🌸

build_hdr_descs_arr — build a header descriptor array 🎀

---

✨ SYNOPSIS ✨

void build_hdr_descs_arr (struct sk_buff *skb , union sub_crq *indir_arr
, int *num_entries , u8 hdr_field );

like, that's the whole signature, no cap 💅

---

🫶 ARGUMENTS 🫶

• skb — the tx socket buffer 🦋 that's the packet's ride, basically
• indir_arr — the indirect array 🌈
• num_entries — how many descriptors are gonna be sent, fr fr a count
• hdr_field — a bit field that decides which headers get sent 👑 so it's giving "choose your own header adventure"

---

🔥 DESCRIPTION 🔥

so what does this function actually do? it builds a TX descriptor array 💀 and that array is full of the applicable L2/L3/L4 packet header descriptors — the ones that get sent by send_subcrq_indirect. that's it, that's the vibe. iconic behavior, honestly ✨

---

🧚 SEE ALSO 🧚

• Kernel file ./drivers/net/ethernet/ibm/ibmvnic.c 📁 (go read the source, iykyk)
• ibmvnic_wait_for_completion(9)
• reuse_ltb(9)
• alloc_long_term_buff(9)
• free_ltb_set(9)
• alloc_ltb_set(9)
• map_rxpool_buf_to_ltb(9)
• map_txpool_buf_to_ltb(9)
• release_rx_pools(9)
• reuse_rx_pools(9)
• init_rx_pools(9)
• release_tx_pools(9)
• reuse_tx_pools(9)
• init_tx_pools(9)
• get_hdr_lens(9)
• create_hdr_descs(9)
• do_passive_init(9)

like a whole friend group of functions, and every single one of them is invited to the group chat 💜

---

mwah 💋 that's the page! brought to you by ./drivers/net/ethernet/ibm, dated October 2026 — and it's still build_hdr_descs_arr(9), bestie, always and forever 🎀✨🌸