tb_domain_approve_switch(9)

🌸 NAME 🌸

okay bestie, welcome to tb_domain_approve_switch(9) from the Kernel API Manual 💖 this one is literally called tb_domain_approve_switch — aka Approve switch — and yes, it’s giving “do what it says on the tin” energy.

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💅 SYNOPSIS 💅

int tb_domain_approve_switch (struct tb *tb , struct tb_switch *sw );

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🫶 ARGUMENTS 🫶

• tb — the domain the switch belongs to.
• sw — the switch to approve.

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✨ DESCRIPTION ✨

so the way this works is: tb_domain_approve_switch() approves the switch by connection-manager-specific means 🦋 and if that succeeds, the connection manager will create a PCIe tunnel from the parent to sw. slay, honestly.

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💖 RETURN 💖

• 0 on success ✨
• a negative errno otherwise 😭

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👑 SEE ALSO 👑

Kernel file: ./drivers/thunderbolt/domain.c — the whole squad is here, no cap:

• tb_domain_alloc(9)
• tb_domain_add(9)
• tb_domain_remove(9)
• tb_domain_suspend_noirq(9)
• tb_domain_resume_noirq(9)
• tb_domain_disapprove_switch(9)
• tb_domain_approve_switch_key(9)
• tb_domain_challenge_switch_key(9)
• tb_domain_disconnect_pcie_paths(9)
• tb_domain_approve_xdomain_paths(9)
• tb_domain_disconnect_xdomain_paths(9)
• tb_domain_disconnect_all_paths(9)

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mwah 💋 this cutie comes from the ./drivers/thunderbolt source/version, dated October 2026, and it’s literally page tb_domain_approve_switch(9). periodt 🎀