l3mdev_link_scope_lookup(9)

💅 l3mdev_link_scope_lookup(9) — Kernel API Manual ✨

okay so we're in the Kernel API Manual, bestie, and this one is l3mdev_link_scope_lookup. no cap, it's giving very specific IPv6 route-lookup energy 🦋

🎀 NAME 🎀

l3mdev_link_scope_lookup — IPv6 route lookup based on flow for link local and multicast addresses. literally her whole job 💖

✨ SYNOPSIS ✨

struct dst_entry * l3mdev_link_scope_lookup (struct net *net , struct flowi6 *fl6 );

🦋 ARGUMENTS 🦋

• net — network namespace for device index lookup. yep, that's the context she's checking the device index in 🌸
• fl6 — IPv6 flow struct for lookup. this is the flow she's working with 🫶

⚠️ okay important caveat bestie: This function does not hold refcnt on the returned dst. Caller must hold rcu_read_lock. do not skip this, fr fr 😭

🔥 SEE ALSO 🔥

• Kernel file ./net/l3mdev/l3mdev.c
• l3mdev_master_ifindex_rcu(9)
• l3mdev_master_upper_ifindex_by_index_rcu(9)
• l3mdev_fib_table_rcu(9)
• l3mdev_fib_rule_match(9)

that's the whole vibe, bestie 💜 source/version is ./net/l3mdev, dated October 2026 — l3mdev_link_scope_lookup(9) signing off, mwah 🎀✨