zerocopy_sg_from_iter(9)

✨ NAME ✨

okay bestie, welcome to zerocopy_sg_from_iter(9) — the kernel API manual page for zerocopy_sg_from_iter, and its whole thing is: Build a zerocopy datagram from an iov_iter. 💅✨

🎀 SYNOPSIS 🎀

int zerocopy_sg_from_iter (struct sk_buff *skb , struct iov_iter *from
);

🫶 ARGUMENTS 🫶

• skb — buffer to copy 🫶
• from — the source to copy from 🌸

💅 DESCRIPTION 💅

okay so the function will first copy up to headlen, and then pin the userspace pages and build frags through them. no cap, that's the sequence. 🧚

It returns 0, -EFAULT or -EMSGSIZE. periodt. 💖

🌈 SEE ALSO 🌈

The kernel file mentioned is ./net/core/datagram.c, and the SEE ALSO crew is:

• __skb_try_recv_datagram(9)
• skb_kill_datagram(9)
• skb_copy_and_crc32c_datagram_iter(9)
• skb_copy_datagram_iter(9)
• skb_copy_datagram_from_iter(9)
• skb_copy_and_csum_datagram(9)
• skb_copy_and_csum_datagram_msg(9)
• datagram_poll_queue(9)
• datagram_poll(9)

Source/version vibe: ./net/core 💜 dated October 2026 🎀 — zerocopy_sg_from_iter(9) out, byeee! 🦋