netlbl_cipsov4_list(9)

💅 netlbl_cipsov4_list(9) — the Kernel API Manual, but make it make sense

okay so bestie, buckle up 🎀 this one's from the Kernel API Manual, and it's literally called netlbl_cipsov4_list — say that five times fast, i dare you 😭

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✨ NAME ✨

netlbl_cipsov4_list — the girl whose whole job is handling a LIST message 🫶

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🦋 SYNOPSIS 🦋

int netlbl_cipsov4_list (struct sk_buff *skb , struct genl_info *info );

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🌸 ARGUMENTS 🌸

• skb — the NETLINK buffer 💌 (this is where the message lives, no cap)
• info — the Generic NETLINK info block ✨ (the little sidecar of metadata)

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👑 DESCRIPTION 👑

So here's the vibe: this function processes a user generated LIST message and responds accordingly, periodt. 💅

Now, the response message the kernel generates? Straightforward, easy, ate. 🔥 But figuring out beforehand what size buffer to allocate? Not it. Not even a little bit. Because like… we literally have to generate the message first to know the size 💀 it's giving catch-22, it's giving circular dependency, it's giving main character energy.

So to keep this function sane (a noble goal tbh), here's what we do: allocate a buffer of NLMSG_GOODSIZE and try to fit the response in that size. If we fail? We restart with a larger buffer and try again. 🔁 And we continue in this manner until we hit a limit of failed attempts — then we give up and just send an error message 🙈 (bestie said enough).

Returns zero on success and negative values on error. That's it, that's the contract. 🌈

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🎀 SEE ALSO 🎀

• Kernel file ./net/netlabel/netlabel_cipso_v4.c — go read the source, iykyk 💜
• netlbl_cipsov4_add_common(9)
• netlbl_cipsov4_add_std(9)
• netlbl_cipsov4_add_pass(9)
• netlbl_cipsov4_add_local(9)
• netlbl_cipsov4_add(9)
• netlbl_cipsov4_listall_cb(9)
• netlbl_cipsov4_listall(9)
• netlbl_cipsov4_remove_cb(9)
• netlbl_cipsov4_remove(9)
• netlbl_cipsov4_genl_init(9)

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and that's the page, bestie 🍓 mwah 💋 — brought to you by ./net/netlabel, dated October 2026, answering to the name netlbl_cipsov4_list(9) ⭐ slay.