dpsw_fdb_add_multicast(9)

💅 dpsw_fdb_add_multicast — the "add your girls to the group chat" syscall ✨

okay so this one's from the Kernel API Manual bestie, section 9 (dpsw_fdb_add_multicast(9)), and it's literally the function that puts interfaces into a multicast group. no cap, it's giving network admin but make it cute 🎀

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🌸 NAME 🌸

dpsw_fdb_add_multicast — adds a whole set of egress interfaces to a multicast group, one by one, slay 💅

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⭐ SYNOPSIS ⭐

int dpsw_fdb_add_multicast (struct fsl_mc_io *mc_io , u32 cmd_flags ,
u16 token , u16 fdb_id , const struct dpsw_fdb_multicast_cfg *cfg );

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🦋 ARGUMENTS 🦋

• mc_io — pointer to the MC portal's I/O object. it's the portal's whole personality, honestly 🫶
• cmd_flags — command flags, and it's one or more of the MC_CMD_FLAG_ crew 🔥
• token — the token of the DPSW object. yes you need it, it's the vibe check for which switch we're talking about ✨
• fdb_id — the Forwarding Database Identifier, aka which fdb we're doing this in 💖
• cfg — the multicast entry configuration. this is the actual content of the group chat invite 🎀

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👑 DESCRIPTION 👑

okay so here's the tea ☕: if the group doesn't exist, it will be created. main character energy, it just makes its own group 😭

it adds only the interfaces that don't belong to this multicast group yet. if you try to sneak in one that's already in there, boom — an error gets generated and the command is just ignored. the audacity, but okay 💀

and the iconic part: this function may be called numerous times, always providing the required interfaces delta. so like, you don't have to re-send the whole roster, just the new girls 🧚✨

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🌈 RETURN 🌈

Completion status, bestie. '0' on Success 🎉 — any error code otherwise 🙈

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💜 SEE ALSO 💜

the kernel file lives at ./drivers/net/ethernet/freescale/dpaa2/dpsw.c — go say hi to it 🫶

and here's the whole friend group, not one of them left out, fr fr:

• dpsw_open(9)
• dpsw_close(9)
• dpsw_enable(9)
• dpsw_disable(9)
• dpsw_reset(9)
• dpsw_set_irq_enable(9)
• dpsw_set_irq_mask(9)
• dpsw_get_irq_status(9)
• dpsw_clear_irq_status(9)
• dpsw_get_attributes(9)
• dpsw_if_set_link_cfg(9)
• dpsw_if_get_link_state(9)
• dpsw_if_set_tci(9)
• dpsw_if_get_tci(9)
• dpsw_if_set_stp(9)
• dpsw_if_get_counter(9)
• dpsw_if_enable(9)
• dpsw_if_disable(9)
• dpsw_if_get_attributes(9)
• dpsw_if_set_max_frame_length(9)
• dpsw_vlan_add(9)
• dpsw_vlan_add_if(9)
• dpsw_vlan_add_if_untagged(9)
• dpsw_vlan_remove_if(9)
• dpsw_vlan_remove_if_untagged(9)
• dpsw_vlan_remove(9)
• dpsw_fdb_add(9)
• dpsw_fdb_remove(9)
• dpsw_fdb_add_unicast(9)
• dpsw_fdb_dump(9)
• dpsw_fdb_remove_unicast(9)
• dpsw_fdb_remove_multicast(9)
• dpsw_ctrl_if_get_attributes(9)
• dpsw_ctrl_if_set_pools(9)
• dpsw_ctrl_if_set_queue(9)
• dpsw_get_api_version(9)
• dpsw_if_get_port_mac_addr(9)
• dpsw_ctrl_if_enable(9)
• dpsw_ctrl_if_disable(9)
• dpsw_set_egress_flood(9)
• dpsw_if_set_learning_mode(9)
• dpsw_acl_add(9)
• dpsw_acl_remove(9)
• dpsw_acl_add_if(9)
• dpsw_acl_remove_if(9)
• dpsw_acl_prepare_entry_cfg(9)
• dpsw_acl_add_entry(9)
• dpsw_acl_remove_entry(9)
• dpsw_set_reflection_if(9)
• dpsw_if_add_reflection(9)
• dpsw_if_remove_reflection(9)
• dpsw_lag_set(9)
• dpsw_if_set_lag_state(9)

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ngl the multicast group is a lifestyle, not just a data structure. add your interfaces, respect the delta, and don't re-add the ones who are already in the chat 💀

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🥺 one last thing before you go — this iconic little page came from ./drivers/net/ethernet/freesca... and it's dated October 2026, and the whole thing is filed under dpsw_fdb_add_multicast(9). periodt. go touch some kernel code bestie, you got this 💖✨🌸