netlbl_unlhsh_free_iface(9)

💖 netlbl_unlhsh_free_iface(9) — the kernel API manual, but make it make sense 💖

Okay bestie, gather round, because today we're reading netlbl_unlhsh_free_iface(9) from the Kernel API Manual, and honestly? She's a tiny function with a big job. ✨

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🎀 NAME 🎀

netlbl_unlhsh_free_iface — literally just frees an interface entry from the hash table. That's the whole vibe. 💅

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🦋 SYNOPSIS 🦋

void netlbl_unlhsh_free_iface (struct rcu_head *entry );

Yes, that's it. One argument. No cap. 🫶

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🌸 ARGUMENTS 🌸

• entry — the entry's RCU field, babe. That's the thing you're handing over. 🎀

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⭐ DESCRIPTION ⭐

So here's the tea, bestie: this function is designed to be used as a callback to the call_rcu function, so that the memory allocated to a hash table interface entry can be released safely. Safety first, always. 👑

But like — and this is the important part, so pay attention — this function does not free the IPv4 and IPv6 address lists that are contained as part of an interface entry. She said "not my department." 😭 It is up to the rest of the code to make sure an interface entry is only freed once its address lists are empty.

Fr fr, lowkey the biggest gotcha on this whole page: a non-empty address list + a free = bad vibes. The rest of the code has to handle that part. Don't @ me, @ the rest of the code. 💀

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🌈 SEE ALSO 🌈

The whole friend group, in the order the page lists them, because we don't do anyone dirty here:

• Kernel file ./net/netlabel/netlabel_unlabeled.c
• netlbl_unlhsh_hash(9)
• netlbl_unlhsh_search_iface(9)
• netlbl_unlhsh_add_addr4(9)
• netlbl_unlhsh_add_addr6(9)
• netlbl_unlhsh_add_iface(9)
• netlbl_unlhsh_add(9)
• netlbl_unlhsh_remove_addr4(9)
• netlbl_unlhsh_remove_addr6(9)
• netlbl_unlhsh_condremove_iface(9)
• netlbl_unlhsh_remove(9)
• netlbl_unlhsh_netdev_handler(9)
• netlbl_unlabel_acceptflg_set(9)
• netlbl_unlabel_addrinfo_get(9)
• netlbl_unlabel_accept(9)
• netlbl_unlabel_list(9)
• netlbl_unlabel_staticadd(9)
• netlbl_unlabel_staticadddef(9)
• netlbl_unlabel_staticremove(9)
• netlbl_unlabel_staticremovedef(9)
• netlbl_unlabel_staticlist_gen(9)
• netlbl_unlabel_staticlist(9)
• netlbl_unlabel_staticlistdef(9)
• netlbl_unlabel_genl_init(9)
• netlbl_unlabel_init(9)
• netlbl_unlabel_getattr(9)
• netlbl_unlabel_defconf(9)

Go read them. All of them. It's giving study group. 📚💜

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Sign-off time, besties 🧚‍♀️💖 — this lil' page lives in ./net/netlabel, and it's dated October 2026. Slay, see you in the next call_rcu callback. Periodt. 👑✨