tb_register_property_dir(9)

💖 tb_register_property_dir — Kernel API Manual ✨

okay bestie, welcome to the group chat 💅 this one's from the Kernel API Manual, and it's literally about telling the host "hey, here's a new property directory, come look 👀".

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🌸 NAME 🌸

tb_register_property_dir — Register property directory to the host 🫶

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⭐ SYNOPSIS ⭐

int tb_register_property_dir (const char *key , struct tb_property_dir
*dir );

like, that's the whole vibe. two args, one int coming back at you ✨

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🎀 ARGUMENTS 🎀

• key — the Key (name) of the directory you're adding, i.e. the label your new directory is gonna rock 🏷️
• dir — the Directory to add. yes literally the thing itself 💖

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🦋 DESCRIPTION 🦋

so here's the tea ☕ — service drivers can use this function to add a new property directory to the host available properties. that's the whole point, no cap.

and then the iconic part: the other connected hosts get notified 📣 so they can re-read properties of this host if they're interested. like, you're not forcing anyone to look, you're just being like "new drop just landed, iykyk 💅". if they care, they re-read. if not, whatever, main character energy 🌈

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🔥 RETURN 🔥

• 0 on success 🎉
• negative errno otherwise 😭 (yeah, it's giving failure, but at least you get an errno to debug with)

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👑 SEE ALSO 👑

Kernel file ./drivers/thunderbolt/xdomain.c — go read the source, bestie, it's all there 📖

and then the whole friend group of related calls, in order:

• tb_xdomain_response(9)
• tb_xdomain_request(9)
• tb_register_protocol_handler(9)
• tb_unregister_protocol_handler(9)
• tb_register_service_driver(9)
• tb_unregister_service_driver(9)
• tb_service_properties_changed(9)
• tb_xdomain_alloc(9)
• tb_xdomain_add(9)
• tb_xdomain_remove(9)
• tb_xdomain_unregister(9)
• tb_xdomain_lane_bonding_enable(9)
• tb_xdomain_lane_bonding_disable(9)
• tb_xdomain_alloc_in_hopid(9)
• tb_xdomain_alloc_out_hopid(9)
• tb_xdomain_release_in_hopid(9)
• tb_xdomain_release_out_hopid(9)
• tb_xdomain_enable_paths(9)
• tb_xdomain_disable_paths(9)
• tb_xdomain_find_by_uuid(9)
• tb_xdomain_find_by_link_depth(9)
• tb_xdomain_find_by_route(9)
• tb_unregister_property_dir(9)

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ngl, if you're registering stuff, you're probably gonna want tb_unregister_property_dir(9) too. balance, bestie 🧚

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and that's the page!! 💜 source lives over in ./drivers/thunderbolt, dated October 2026, and that's the sign-off — mwah, go ship it 🍓✨