genlmsg_mult...tns_filtered(9)

💅 genlmsg_mult...tns_filtered(9) 💅

okay so bestie, this is a page from the Kernel API Manual — yes, the kernel, that big scary thing, but you've got this 🫶. Buckle up, we're sending netlink messages to a specific netns with a filter function and honestly? it's giving main character energy ✨

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🌸 NAME 🌸

genlmsg_multicast_netns_filtered — multicast a netlink message to a specific netns with filter function 💌

Like, you're broadcasting a message, but only to one net namespace, and there's a filter function deciding who actually gets it. icon behavior, no cap.

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🎀 SYNOPSIS 🎀

int genlmsg_multicast_netns_filtered (const struct genl_family *family ,
struct net *net , struct sk_buff *skb , u32 portid , unsigned int group
, gfp_t flags , netlink_filter_fn filter , void *filter_data );

she takes eight arguments. eight! and every single one matters, bestie 🌈.

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✨ ARGUMENTS ✨

• family — the generic netlink family 🧚 this is the whole family situation you're repping.
• net — the net namespace 🌐 the specific one. not all of them. this one.
• skb — netlink message as socket buffer 📦 your message, packaged up all cute in a socket buffer.
• portid — own netlink portid to avoid sending to yourself 🙈 like, hi, please don't text yourself, that's what this is for.
• group — offset of multicast group in groups array 🔢 an offset, bestie, not the group itself. keep that in mind, iykyk.
• flags — allocation flags ⚙️ the usual allocation flags situation.
• filter — filter function 🕵️ the vibe check, basically. decides who's worthy.
• filter_data — filter function private data 🔒 private data that gets passed along to that filter function. very exclusive, very private.

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🌟 RETURN 🌟

0 on success 🎉, negative error code for failure 😭.

that's it. that's the deal. zero equals slay, negative equals not slay.

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🦋 SEE ALSO 🦋

bestie there is so much here, and you know we're listing every single one 💜 — from the kernel file ./include/net/genetlink.h:

• struct genl_multicast_group(9)
• struct genl_family(9)
• struct genl_info(9)
• struct genl_small_ops(9)
• struct genl_ops(9)
• struct genl_split_ops(9)
• struct genl_dumpit_info(9)
• genl_info_init_ntf(9)
• genlmsg_iput(9)
• genlmsg_nlhdr(9)
• genlmsg_parse_deprecated(9)
• genlmsg_parse(9)
• genl_dump_check_consistent(9)
• genlmsg_put_reply(9)
• genlmsg_end(9)
• genlmsg_cancel(9)
• genlmsg_multicast_netns(9)
• genlmsg_multicast(9)
• genlmsg_multicast_allns(9)
• genlmsg_unicast(9)
• genlmsg_reply(9)
• genlmsg_data(9)
• genlmsg_len(9)
• genlmsg_msg_size(9)
• genlmsg_total_size(9)
• genlmsg_new(9)
• genl_set_err(9)

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💀 reminder: genlmsg_parse_deprecated is literally called deprecated — the name is not subtle, bestie. it's right there in the name. don't say i didn't warn you.

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okay that's the whole page!! every argument, every option, every single SEE ALSO reference — nothing skipped, nothing merged, we ate and left no crumbs 👑

this lil gem lives in <code>./include/net</code>, dated October 2026 — mwah, love that for us 💖✨