STRUCT TB(9)

🌸 NAME 🌸

Okay so, bestie, this is the struct tb(9) page from the Kernel API Manual — and it's literally the main thunderbolt bus structure. Main character energy, no cap. 💅

🦋 SYNOPSIS 🦋

Here's the whole struct in all its glory, fr fr — every field accounted for and copied exactly:

struct tb {
    struct device dev;
    struct mutex lock;
    struct tb_nhi *nhi;
    struct tb_ctl *ctl;
    struct workqueue_struct *wq;
    struct tb_switch *root_switch;
    const struct tb_cm_ops *cm_ops;
    int index;
    enum tb_security_level security_level;
    size_t nboot_acl;
    unsigned long privdata[];
};

🎀 Members 🎀

Now let's do a vibe check on each member, because every single one matters:

• dev — domain device. It's giving core device representation, periodt.
• lock — the Big lock. Must be held when accessing any struct tb_switch / struct tb_port. Respect the lock, bestie. 🔒
• nhi — pointer to the NHI structure.
• ctl — control channel for this domain.
• wq — ordered workqueue for all domain specific work.
• root_switch — root switch of this domain.
• cm_ops — connection manager specific operations vector.
• index — Linux assigned domain number.
• security_level — current security level.
• nboot_acl — number of boot ACLs the domain supports.
• privdata — private connection manager specific data.

💅 SEE ALSO 💅

Go be nosy in these, bestie — Kernel file ./include/linux/thunderbolt.h and all these cross-refs:

• enum tb_security_level(9)
• struct tb_property_dir(9)
• struct tb_property(9)
• enum tb_link_width(9)
• struct tb_xdomain(9)
• struct tb_protocol_handler(9)
• struct tb_service(9)
• struct tb_service_driver(9)
• struct tb_nhi(9)
• struct tb_ring(9)
• enum ring_desc_flags(9)
• struct ring_frame(9)
• tb_ring_rx(9)
• tb_ring_tx(9)
• tb_ring_dma_device(9)

Source/version: ./include/linux · date: October 2026 — that's the footer, and we're closing it out with a little sparkle. Bye bestie, go hold that lock 💖✨