batadv_bla_loopdetect_check(9)

💖 batadv_bla_loopdetect_check(9) — check and handle a detected loop 💖

okay bestie, welcome to the batadv_bla_loopdetect_check(9) page, straight out of the Kernel API Manual ✨ this one's short and sweet, so grab your iced coffee and let's go 🧚

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✨ NAME ✨

batadv_bla_loopdetect_check — check and handle a detected loop 🌀

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🌸 SYNOPSIS 🌸

bool batadv_bla_loopdetect_check (struct batadv_priv *bat_priv , struct
       sk_buff *skb , struct batadv_hard_iface *primary_if , unsigned short vid
       );

like, that's the whole signature, no cap. it hands you back a bool 🫶

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🎀 ARGUMENTS 🎀

• bat_priv — the bat priv, aka the one holding all the mesh interface information 👑 it's giving main character energy, everything lives in here.
• skb — the packet to check 📦 the lil guy we're investigating.
• primary_if — the interface where the request came on 🦋 lowkey important context.
• vid — the VLAN ID of the frame 🏷️ yes, the VLAN. don't skip it.

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💅 DESCRIPTION 💅

so here's the vibe: this function checks if this packet is a loop detect frame which has been sent by us 👀 like, did we send this? is this our own reflection in the mirror? 🪞

and if that's the case — if it really is one of ours — it throws an uevent and logs the event 🔥 that's it, that's the job. it notices and it makes noise about it, periodt.

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⭐ RETURN ⭐

• true — yup, it is a loop detect frame which is to be dropped 💀 bye bestie.
• false — nope, not one of those, carry on 🌈

literally that simple.

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🦋 SEE ALSO 🦋

the kernel file it lives in: ./net/batman-adv/bridge_loop_avoidance.c 📁 and honestly? the whole friend group is here, so let's name them all:

• batadv_choose_claim(9)
• batadv_choose_backbone_gw(9)
• batadv_compare_backbone_gw(9)
• batadv_compare_claim(9)
• batadv_backbone_gw_release(9)
• batadv_backbone_gw_put(9)
• batadv_claim_release(9)
• batadv_claim_put(9)
• batadv_claim_hash_find(9)
• batadv_backbone_hash_find(9)
• batadv_bla_del_backbone_claims(9)
• batadv_bla_send_claim(9)
• batadv_bla_loopdetect_report(9)
• batadv_bla_get_backbone_gw(9)
• batadv_bla_update_own_backbone_gw(9)
• batadv_bla_answer_request(9)
• batadv_bla_send_request(9)
• batadv_bla_send_announce(9)
• batadv_bla_add_claim(9)
• batadv_bla_claim_get_backbone_gw(9)
• batadv_bla_del_claim(9)
• batadv_handle_announce(9)
• batadv_handle_request(9)
• batadv_handle_unclaim(9)
• batadv_handle_claim(9)
• batadv_check_claim_group(9)
• batadv_bla_process_claim(9)
• batadv_bla_purge_backbone_gw(9)
• batadv_bla_purge_claims(9)
• batadv_bla_update_orig_address(9)
• batadv_bla_send_loopdetect(9)
• batadv_bla_status_update(9)
• batadv_bla_periodic_work(9)
• batadv_bla_init(9)
• batadv_bla_check_duplist(9)
• batadv_bla_check_ucast_duplist(9)
• batadv_bla_check_bcast_duplist(9)
• batadv_bla_is_backbone_gw_orig(9)
• batadv_bla_is_backbone_gw(9)
• batadv_bla_free(9)
• batadv_bla_rx(9)
• batadv_bla_tx(9)
• batadv_bla_claim_dump_entry(9)
• batadv_bla_claim_dump_bucket(9)
• batadv_bla_claim_dump(9)
• batadv_bla_backbone_dump_entry(9)
• batadv_bla_backbone_dump_bucket(9)
• batadv_bla_backbone_dump(9)
• batadv_bla_check_claim(9)

fr fr that's the entire list, i didn't skip a single one 💖 iykyk.

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okay that's the whole page bestie, go be iconic with it 💅✨ this came from ./net/batman-adv, dated October 2026, and it's the batadv_bla_loopdetect_check(9) page — mwah, love u, bye 🫶🎀