batadv_netli...from_ifindex(9)

💅 batadv_netli...from_ifindex(9) — kernel API manual, but make it make sense ✨

okay so real talk, bestie: this is a page out of the Kernel API Manual (yes, that kernel manual), and the star of the show is batadv_netlink_get_hardif_from_ifindex. it lives in ./net/batman-adv, the date on it is October 2026, and it's giving "quiet little helper function that everyone depends on" energy. let's get into it 🫶

---

🌸 NAME 🌸

batadv_netlink_get_hardif_from_ifindex — Get hard-iface from ifindex. literally what it says on the tin, no cap.

---

🦋 SYNOPSIS 🦋

struct batadv_hard_iface * batadv_netlink_get_hardif_from_ifindex
(struct batadv_priv *bat_priv , struct net *net , int ifindex );

that's the whole signature, bestie. three args, one pointer back. iconic.

---

🎀 ARGUMENTS 🎀

• bat_priv — the bat priv 🦇 with all the mesh interface information in it. it's the main character of this whole situation.
• net — the applicable net namespace. which world are we in, yknow?
• ifindex — index of the hard interface. the number that finds your fave.

---

🔥 RETURN 🔥

Pointer to the hard interface (with increased refcnt — yes, it bumps the refcount, so mind your cleanup, bestie 💀) on success. On error? you get an error pointer. that's it, that's the deal. 🙈

ngl the refcnt bump is the part people forget — treat that pointer like borrowed merch, you gotta give it back.

---

⭐ SEE ALSO ⭐

Kernel file ./net/batman-adv/netlink.c enum — that's the neighborhood, go say hi 👋

and the whole friend group, in order:

• batadv_netlink_multicast_groups(9)
• batadv_genl_ops_flags(9)
• batadv_netlink_get_ifindex(9)
• batadv_netlink_mesh_fill_ap_isolation(9)
• batadv_netlink_set_mesh_ap_isolation(9)
• batadv_netlink_mesh_fill(9)
• batadv_netlink_notify_mesh(9)
• batadv_netlink_get_mesh(9)
• batadv_netlink_set_mesh(9)
• batadv_netlink_tp_meter_put(9)
• batadv_netlink_tpmeter_notify(9)
• batadv_netlink_tp_meter_start(9)
• batadv_netlink_tp_meter_cancel(9)
• batadv_netlink_hardif_fill(9)
• batadv_netlink_notify_hardif(9)
• batadv_netlink_cmd_get_hardif(9)
• batadv_netlink_set_hardif(9)
• batadv_netlink_dump_hardif(9)
• batadv_netlink_vlan_fill(9)
• batadv_netlink_notify_vlan(9)
• batadv_netlink_get_vlan(9)
• batadv_netlink_set_vlan(9)
• batadv_netlink_get_meshif_from_ifindex(9)
• batadv_netlink_get_meshif_from_info(9)
• batadv_netlink_get_meshif(9)
• batadv_netlink_get_hardif_from_info(9)
• batadv_netlink_get_hardif(9)
• batadv_get_vlan_from_info(9)
• batadv_pre_doit(9)
• batadv_post_doit(9)
• batadv_netlink_register(9)
• batadv_netlink_unregister(9)

like, the whole netlink family reunion 😭 every single one of them, we did not skip a single cousin. periodt.

---

anyway that's the page!! go forth and resolve those ifindexes responsibly 💖 hope this slayed for you. source is ./net/batman-adv, manual dated October 2026, and the page header do be batadv_netli...from_ifindex(9) (yes, truncated, that's just how it ships — iykyk 💅). mwah, bye bestie! 🌈👑