STRUCT MUX_QLTH(9)

💅 struct mux_qlth(9) — the Kernel API Manual glow-up 💅

okay so bestie, you know the kernel API manual? yeah — this page is from it, and it's literally about struct mux_qlth, iykyk. it's the Structure of Aggregated Datagram Queue Level Table Header. yes that's a whole mouthful, hydrate before you say it. 🫶

---

✨ NAME ✨

struct mux_qlth — Structure of Aggregated Datagram Queue Level Table Header. that's it, that's the name, and it ate. 👑

---

🦋 SYNOPSIS 🦋

here's the whole struct, copy it exactly bestie, no typos or it's over for you:

struct mux_qlth {
    __le32 signature;
    __le16 table_length;
    u8 if_id;
    u8 reserved;
    __le32 next_table_index;
    __le32 reserved2;
    struct mux_qlth_ql ql;
 };

---

🎀 Members 🎀

okay so let's meet the whole cast, they're all main characters in their own way:

• signature — the Signature of the Queue Level Table Header. the value is 0x48544C51, which in ASCII characters is 'Q' 'L' 'T' 'H'. it's giving personalized license plate fr fr. 💖
• table_length — Length (in bytes) of the datagram table. and listen, this length shall include the queue level table header size, okay? Minimum value: 0x10. don't come in under that, it's not the vibe. 😭
• if_id — ID of the interface the queue levels in the table belong to. that's its whole job and it does it. 🦋
• reserved — Reserved byte. Set to zero. that's it. that's the task. zero. 🙈
• next_table_index — the Index (in bytes) to the next table in the buffer. and the index shall count from the start of the block including the 16-byte header, so don't get cute with it. a value of zero indicates end of the list — that's the "no more tables, we're done here" signal. ⭐
• reserved2 — Reserved bytes. Set to zero. (no period after that one in the original, and honestly? iconic of it. 💀) still zero tho. always zero.
• ql — Queue level table with variable length. variable! length! she's flexible, she's mysterious, she's not like other tables. 🌸

---

🔥 SEE ALSO 🔥

bestie, the lore goes deep, here's the whole friend group:

• Kernel file ./drivers/net/wwan/iosm/iosm_ipc_mux.h
• union mux_cmd_param(9)
• struct mux_adth_dg(9)
• struct mux_qlth_ql(9)
• struct mux_adb(9)
• struct mux_acb(9)
• struct iosm_mux(9)
• ipc_mux_init(9)
• ipc_mux_deinit(9)
• ipc_mux_check_n_restart_tx(9)
• ipc_mux_get_active_protocol(9)
• ipc_mux_open_session(9)
• ipc_mux_close_session(9)
• ipc_mux_get_max_sessions(9)

go read them all, i'll wait. 🧚

---

and that's the whole page, bestie!! 💜 it lives over in ./drivers/net/wwan/iosm, it's dated October 2026, and it will forever be known as struct mux_qlth(9). slay, periodt, go read a header file for fun. 👑✨