ENUM NLMSGERR_ATTRS(9)

✨ enum nlmsgerr_attrs(9) ✨

okay so bestie, this is a page from the Kernel API Manual — we're talking about enum nlmsgerr_attrs, which is literally the enum that holds the netlink error message attributes. yes netlink. yes kernel. we're doing this. 💅

---

🌸 NAME 🌸

enum nlmsgerr_attrs — the nlmsgerr attributes, bestie. that's it. that's the whole vibe. 🎀

---

🦋 SYNOPSIS 🦋

enum nlmsgerr_attrs {
    NLMSGERR_ATTR_UNUSED ,
    NLMSGERR_ATTR_MSG ,
    NLMSGERR_ATTR_OFFS ,
    NLMSGERR_ATTR_COOKIE ,
    __NLMSGERR_ATTR_MAX ,
    NLMSGERR_ATTR_MAX

};

look at that enum slay. six whole members. no cap. 🔥

---

👑 Constants 👑

okay so let's meet the cast, one by one, main character energy only:

• NLMSGERR_ATTR_UNUSED — literally unused. that's its whole deal. it's just there. respect. 🙈
• NLMSGERR_ATTR_MSG — the error message string, and it's a string. giving "here's what went wrong" energy, honestly iconic. 💬
• NLMSGERR_ATTR_OFFS — this one's the offset of the invalid attribute in the original message, and politely, it's counting from the beginning of the header. type is a u32. so useful, so precise. 📍
• NLMSGERR_ATTR_COOKIE — ngl the name alone ate. it's an arbitrary subsystem specific cookie to be used — in the success case — to identify a created object or operation or similar. type is binary. it's giving little identity token, lowkey obsessed. 🍪
• __NLMSGERR_ATTR_MAX — the number of attributes. that's it. that's what it is. ✨
• NLMSGERR_ATTR_MAX — the highest attribute number. different from the one above, bestie, don't mix them up, i'm begging. 👑

fr fr, notice that __NLMSGERR_ATTR_MAX ("number of attributes") and NLMSGERR_ATTR_MAX ("highest attribute number") are two separate things — keep your eye on which is which, iykyk. 🫶

---

🔍 SEE ALSO 🔍

• Kernel file ./tools/include/uapi/linux/netlink.h — go read it, bestie, the source never lies. 📖

---

and that's the whole page, periodt. 💜 this one's from ./tools/include/uapi/linux and it's dated October 2026 — so go forth and handle your netlink errors with confidence, you gorgeous kernel dev you. 🌈⭐🦋 🫶