STRUCT QRTR_NODE(9)

✨ struct qrtr_node(9) — endpoint node ✨

okay so this is a page from the Kernel API Manual, and it's literally about struct qrtr_node, which is the endpoint node struct. yes bestie, the whole page is one struct. she's iconic like that 💅

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🌸 NAME 🌸

struct qrtr_node — endpoint node

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🎀 SYNOPSIS 🎀

ok so here's the whole struct, copied exactly, no edits, i promise 🫶

struct qrtr_node {
    struct mutex ep_lock;
    struct qrtr_endpoint *ep;
    struct kref ref;
    unsigned int nid;
    struct xarray qrtr_tx_flow;
    struct mutex qrtr_tx_lock;
    bool hello_sent;
    struct sk_buff_head rx_queue;
    struct list_head item;
    struct delayed_work say_hello;
 };

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💖 Members 💖

nine members, no skips, let's go 🌈

• ep_lock — the lock for endpoint management and callbacks. she's guarding the ep situation, respect her 🫡
• ep — the endpoint. that's it. that's the whole description, and honestly? valid.
• ref — reference count for node. keep track of who's still holding on, bestie 🔥
• nid — node id. short name, big job 💜
• qrtr_tx_flow — an xarray of qrtr_tx_flow, keyed by node << 32 | port. yes the shift is real, write it down exactly like that 📝
• qrtr_tx_lock — lock for qrtr_tx_flow inserts. the bouncer at the insert door 🚪
• hello_sent — hello packet send successful. a bool that's just out here keeping receipts on whether the hello actually went through 🎀
• rx_queue — receive queue. the incoming mail pile 📬
• item — list item for broadcast list. she's on the list, literally 🧚
• say_hello — delayed work for sending hello packet. not me setting a whole delayed work just to say hi 😭 adorable

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🦋 SEE ALSO 🦋

Kernel file ./net/qrtr/af_qrtr.c, plus all her friends:

• struct qrtr_hdr_v1(9)
• struct qrtr_hdr_v2(9)
• struct qrtr_tx_flow(9)
• qrtr_tx_resume(9)
• qrtr_tx_wait(9)
• qrtr_tx_flow_failed(9)
• qrtr_endpoint_post(9)
• qrtr_alloc_ctrl_packet(9)
• qrtr_endpoint_register(9)
• qrtr_endpoint_unregister(9)

go read them, iykyk 👑

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and that's the page bestie, you ate that 💅

sign-off szn: this was from ./net/qrtr, dated October 2026, and it's the struct qrtr_node(9) page — mwah, no cap 💖