netlink_poli...p_write_attr(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, welcome to the Kernel API Manual — yes it's the kernel, yes it's netlink, no you don't have to be scared. this page is all about netlink_policy_dump_write_attr, one little function that does one very specific thing and honestly? it ate. 🔥

✨ NAME ✨

netlink_policy_dump_write_attr — write a given attribute policy 🎀

🌸 SYNOPSIS 🌸

int netlink_policy_dump_write_attr (struct sk_buff *skb , const struct
       nla_policy *pt , int nestattr );

literally that's the whole signature. three args, one int coming back atcha. slay. ✨

🦋 ARGUMENTS 🦋

  • skb — the message skb you're writing to. that's your canvas, your group chat, the place the bytes go. 🫶
  • pt — the attribute's policy. this is the vibe check for the attribute, like the rulebook it has to follow. 👑
  • nestattr — the nested attribute ID to use. yep, it's nested, we love a nested moment. 🪆

💖 RETURN 💖

  • 0 — success, we love to see it, no notes. ⭐
  • an error code — anything other than zero, boo. 🍓
  • -ENODATA — okay this one is special: it means there's no policy data and the attribute is generally rejected. so it's not just "oops an error", it's "there is nothing here and this attribute gets the boot". 😭 keep that in mind, it's doing a lot of work. 💀

🌈 SEE ALSO 🌈

the kernel file, iconic, lives right here:

./net/netlink/policy.c

and the whole friend group: 🧚

okay that's the page!! huge thanks to the <bold>./net/netlink</bold> era and the October 2026 release, where this little netlink function lives its best life. main character energy fr fr. 💜🌸🦋✨

📦 where this page comes from