rtl83xx_port_mdb_add(9)

💖 NAME 💖

okay so welcome to the rtl83xx_port_mdb_add(9) page, straight outta the Kernel API Manual 💖 bestie, this one is literally:

rtl83xx_port_mdb_add — add a multicast database entry to a port database ✨

That's the whole vibe: it's the function that adds a multicast database entry into a port database. Cute, focused, no cap.

✨ SYNOPSIS ✨

int rtl83xx_port_mdb_add (struct dsa_switch *ds , int port , const
       struct switchdev_obj_port_mdb *mdb , struct dsa_db db );

🎀 ARGUMENTS 🎀

Here's what you're feeding it, bestie:

• ds — DSA switch instance. Like, the switch situation you're working with.
• port — port index. Which port we're talking about.
• mdb — multicast database entry to add. The actual entry, hello.
• db — database where the entry should be added. This is the “where does it go” parameter.

🌸 DESCRIPTION 🌸

This function adds a multicast database entry to the standalone port database or to a bridge database. That's it, that's the whole job — it's giving “put the multicast database entry in its rightful database home” energy. 🦋

🫶 CONTEXT 🫶

Can sleep. Yep, that's the context note, and it's iconic in its brevity. 😴

💅 RETURN 💅

• 0 on success
• negative value for failure

So: happy path gives you 0, and anything negative means it did not slay. 😭

🌈 SEE ALSO 🌈

Kernel file: ./drivers/net/dsa/realtek/rtl83xx.c — that's the source spot for this whole situation.

• rtl83xx_lock(9)
• rtl83xx_unlock(9)
• rtl83xx_setup_user_mdio(9)
• rtl83xx_probe(9)
• rtl83xx_register_switch(9)
• rtl83xx_unregister_switch(9)
• rtl83xx_shutdown(9)
• rtl83xx_remove(9)
• rtl83xx_port_bridge_join(9)
• rtl83xx_port_bridge_leave(9)
• rtl83xx_port_fast_age(9)
• rtl83xx_port_fdb_add(9)
• rtl83xx_port_fdb_del(9)
• rtl83xx_port_fdb_dump(9)
• rtl83xx_port_mdb_del(9)
• rtl83xx_port_bridge_flags(9)
• rtl83xx_setup_port_flood_control(9)

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mwah 💋 — signing off from ./drivers/net/dsa/realtek, dated October 2026, on the rtl83xx_port_mdb_add(9) page. 🫶