nla_nest_end(9)

💅 nla_nest_end(9) — the Kernel API Manual, bestie edition 🌸

Okay so picture this: you're deep in the Linux kernel, you're building netlink attributes, and you've been nesting them like little Russian dolls. This is the function that closes the doll. 🎀

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✨ NAME ✨

nla_nest_end — Finalize nesting of attributes. That's it. That's the whole vibe. It wraps up your nesting arc like the season finale it deserves. 👑

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🦋 SYNOPSIS 🦋

int nla_nest_end (struct sk_buff *skb , struct nlattr *start );

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🌸 ARGUMENTS 🌸

• skb — the socket buffer the attributes are stored in. Lowkey the whole party venue. Everything you've been appending lives in here. 💜
• start — container attribute. This is the parent doll, the one that's about to get its little header updated. Main character energy, honestly. ✨

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🧚 DESCRIPTION 🧚

So here's the tea, bestie: you already nested stuff. You called nla_nest_start (or one of the many cousins in SEE ALSO, iykyk), you shoved a bunch of attributes inside, and now the container attribute is just sitting there with a header that does not know about any of them. Embarrassing for it, ngl. 😭

nla_nest_end corrects the container attribute header to include the all appended attributes. That's literally the assignment. It goes back and fixes the header so it finally reflects all the attributes you appended — like updating your bio after a whole rebrand. Periodt. 💅

No cap, that's the entire job. Simple, iconic, essential. 🫶

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⭐ RETURN ⭐

It returns the total data length of the skb. Yep — the whole thing's data length, served fresh. Take it, use it, slay. 🔥

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🌈 SEE ALSO 🌈

Right, bestie, buckle up — this is the extended universe, and I mean extended. The kernel file is ./include/net/netlink.h, and it comes with an entire friend group:

struct nla_policy(9), struct nl_info(9), enum netlink_validation(9), nlmsg_msg_size(9), nlmsg_total_size(9), nlmsg_padlen(9), nlmsg_data(9), nlmsg_len(9), nlmsg_payload(9), nlmsg_attrdata(9), nlmsg_attrlen(9), nlmsg_ok(9), nlmsg_next(9), nla_parse(9), nla_parse_deprecated(9), nla_parse_deprecated_strict(9), __nlmsg_parse(9), nlmsg_parse(9), nlmsg_parse_deprecated(9), nlmsg_parse_deprecated_strict(9), nlmsg_find_attr(9), nla_validate_deprecated(9), nla_validate(9), nlmsg_validate_deprecated(9), nlmsg_report(9), nlmsg_seq(9), nlmsg_for_each_attr(9), nlmsg_for_each_attr_type(9), nlmsg_put(9), nlmsg_append(9), nlmsg_put_answer(9), nlmsg_new(9), nlmsg_new_large(9), nlmsg_end(9), nlmsg_get_pos(9), nlmsg_trim(9), nlmsg_cancel(9), nlmsg_free(9), nlmsg_consume(9), nlmsg_multicast_filtered(9), nlmsg_multicast(9), nlmsg_unicast(9), nlmsg_for_each_msg(9), nl_dump_check_consistent(9), nla_attr_size(9), nla_total_size(9), nla_padlen(9), nla_type(9), nla_data(9), nla_len(9), nla_ok(9), nla_next(9), nla_find_nested(9), nla_parse_nested(9), nla_parse_nested_deprecated(9), nla_put_u8(9), nla_put_u16(9), nla_put_be16(9), nla_put_net16(9), nla_put_le16(9), nla_put_u32(9), nla_put_uint(9), nla_put_be32(9), nla_put_net32(9), nla_put_le32(9), nla_put_u64_64bit(9), nla_put_be64(9), nla_put_net64(9), nla_put_le64(9), nla_put_s8(9), nla_put_s16(9), nla_put_s32(9), nla_put_s64(9), nla_put_sint(9), nla_put_string(9), nla_put_flag(9), nla_put_msecs(9), nla_put_in_addr(9), nla_put_in6_addr(9), nla_put_bitfield32(9), nla_get_u32(9), nla_get_u32_default(9), nla_get_be32(9), nla_get_be32_default(9), nla_get_le32(9), nla_get_le32_default(9), nla_get_u16(9), nla_get_u16_default(9), nla_get_be16(9), nla_get_be16_default(9), nla_get_le16(9), nla_get_le16_default(9), nla_get_u8(9), nla_get_u8_default(9), nla_get_u64(9), nla_get_u64_default(9), nla_get_uint(9), nla_get_uint_default(9), nla_get_be64(9), nla_get_be64_default(9), nla_get_le64(9), nla_get_le64_default(9), nla_get_s32(9), nla_get_s32_default(9), nla_get_s16(9), nla_get_s16_default(9), nla_get_s8(9), nla_get_s8_default(9), nla_get_s64(9), nla_get_s64_default(9), nla_get_sint(9), nla_get_sint_default(9), nla_get_flag(9), nla_get_msecs(9), nla_get_msecs_default(9), nla_get_in_addr(9), nla_get_in_addr_default(9), nla_get_in6_addr(9), nla_get_bitfield32(9), nla_memdup(9), nla_nest_start_noflag(9), nla_nest_start(9), nla_nest_end_safe(9), nla_nest_cancel(9), nla_put_empty_nest(9), __nla_validate_nested(9), nla_need_padding_for_64bit(9), nla_align_64bit(9), nla_total_size_64bit(9), nla_for_each_attr(9), nla_for_each_attr_type(9), nla_for_each_nested(9), nla_for_each_nested_type(9), nla_is_last(9).

Like I said. Extended universe. Go read all of them, bestie, I believe in you. 📚💖

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🎀 tiny sign-off, and it's a whole mood: this page lives in ./include/net and it's stamped October 2026. Screenshot it, frame it, put it on the fridge. 💅✨🦋