dev_mc_sync(9)

🌸 NAME

dev_mc_sync — Synchronize device's multicast list to another device ✨

hii bestie, welcome to dev_mc_sync(9), straight out of the Kernel API Manual 💅 this is the page for syncing one device’s multicast list over to another device, and yes it’s giving very “sharing is caring” energy 🫶

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✨ SYNOPSIS

int dev_mc_sync (struct net_device *to , struct net_device *from );

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🎀 ARGUMENTS

• to — destination device 🎯 the one receiving the addresses
• from — source device 🛫 the one they’re coming from

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🦋 DESCRIPTION

okay so here’s the vibe: this function adds newly added addresses to the destination device and releases addresses that have no users left 💖 it’s literally keeping the multicast list in sync, no cap.

bestie, the source device must be locked by netif_addr_lock_bh before you call this — fr fr, don’t skip the lock 🔒😭

This function is intended to be called from the ndo_set_rx_mode function of layered software devices 👑 that’s its whole main character moment.

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🔥 SEE ALSO

Kernel file: ./net/core/dev_addr_lists.c 🌈

• __hw_addr_sync_dev(9)
• __hw_addr_ref_sync_dev(9)
• __hw_addr_ref_unsync_dev(9)
• __hw_addr_unsync_dev(9)
• __hw_addr_list_snapshot(9)
• __hw_addr_list_reconcile(9)
• dev_addr_flush(9)
• dev_addr_init(9)
• dev_addr_add(9)
• dev_addr_del(9)
• dev_uc_add_excl(9)
• dev_uc_add(9)
• dev_uc_del(9)
• dev_uc_sync(9)
• dev_uc_sync_multiple(9)
• dev_uc_unsync(9)
• dev_uc_flush(9)
• dev_uc_init(9)
• dev_mc_add_excl(9)
• dev_mc_add(9)
• dev_mc_add_global(9)
• dev_mc_del(9)
• dev_mc_del_global(9)
• dev_mc_sync_multiple(9)
• dev_mc_unsync(9)
• dev_mc_flush(9)
• dev_mc_init(9)
• netif_uc_promisc_update(9)
• __dev_set_rx_mode(9)
• netif_rx_mode_sync(9)

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later bestie 🫶 this page’s home base is ./net/core, its date stamp is October 2026, and the footer is still out here saying dev_mc_sync(9) ✨💜