xt_unregister_table_exit(9)

✨ NAME ✨

okay so bestie, this is xt_unregister_table_exit from the Kernel API Manual — the little function that removes a table during namespace teardown 💅 not me learning kernel teardown and lowkey thriving.

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🌸 SYNOPSIS 🌸

struct xt_table * xt_unregister_table_exit (struct net *net , u8 af ,
const char *name );

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🎀 ARGUMENTS 🎀

• net — the network namespace from which to unregister the table. literally where the table is getting unregistered from, bestie.
• af — address family (e.g., NFPROTO_IPV4, NFPROTO_IPV6). so you're telling it which family vibe we're on.
• name — name of the table to unregister. the actual table's name, no cap.

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🦋 DESCRIPTION 🦋

This one completes the unregister process for a table, periodt. It must be called from the pernet ops .exit callback — like, this is not optional, okay? It's the second stage after xt_unregister_table_pre_exit, so think sequel energy: you pair it with xt_unregister_table_pre_exit during namespace shutdown. 💖

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🌈 RETURN 🌈

You get back the unregistered table, or NULL if the table was never instantiated. The caller needs to kfree the table after it has removed the family specific matches/targets. no cap, that cleanup step is on you. ✨

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👑 SEE ALSO 👑

Kernel file ./net/netfilter/x_tables.c and the whole bestie squad:

• xt_check_proc_name(9)
• xt_check_entry_offsets(9)
• xt_alloc_entry_offsets(9)
• xt_find_jump_offset(9)
• xt_copy_counters(9)
• xt_unregister_table_pre_exit(9)
• xt_hook_ops_alloc(9)
• xt_percpu_counter_alloc(9)

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mwah 💋 source/version ./net/netfilter, dated October 2026 — that's the xt_unregister_table_exit(9) sign-off, bye bestie! 🫶