nlmsg_notify(9)

📦 version 7.3.1, in nixpkgs unstable

💌 nlmsg_notify(9) — like, the kernel API manual page, bestie

Okay so this is nlmsg_notify(9) straight out of the Kernel API Manual, and it's literally the little function that goes "hey, psst, something happened" over netlink. Not me being obsessed with a notification sender but here we are 🎀

✨ NAME ✨

nlmsg_notify — send a notification netlink message

Like, that's it. That's the whole job. It sends a notification netlink message. Slay 💅

🌸 SYNOPSIS 🌸

int nlmsg_notify (struct sock *sk , struct sk_buff *skb , u32 portid ,
                  unsigned int group , int report , gfp_t flags );

Returns an int. Takes six args. No cap, that's the whole signature 👑

🦋 ARGUMENTS 🦋

Okay bestie, let's go through these one by one, iykyk:

  • sk — the netlink socket to use. Like the phone you're making the call from 📞
  • skb — the notification message itself. The actual tea being delivered ☕
  • portid — destination netlink portid for reports, or 0. So either you name a port, or you put 0 and say "whatever" 🙈
  • group — destination multicast group, or 0. Same energy: name a group or hit it with a 0 💀
  • report — 1 to report back, 0 to disable. Binary icon behaviour, honestly 🌈
  • flags — allocation flags. The boring-but-important ones, ngl 🫶
Fr fr, notice how portid and group both take 0 as a "nope, none" value, and report is a straight 1/0 vibe check. Don't get them twisted 💖

🔥 SEE ALSO 🔥

Kernel file ./net/netlink/af_netlink.c

Go read those if you want the full netlink cinematic universe, it's giving main character energy ✨

💖 and that's the page!! 💖

Little sign-off moment: this icon lives in ./net/netlink, and the page is dated October 2026 — so yeah, future-coded but fully current 💜 Go forth and notify, bestie, you're gonna ate 🎀🦋⭐

📦 where this page comes from