batadv_tp_b...error_notify(9)

👑 batadv_tp_batctl_error_notify — a whole vibe check 💅

okay so first thing, bestie: this page lives in the Kernel API Manual ✨ (yes the whole big kernel docs situation), and it's about one very specific little function. Let's get into it 🫶

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✨ NAME ✨

batadv_tp_batctl_error_notify — literally just "send client error result to client" 💌 like it's the function whose entire job is telling the client that things went sideways. no cap.

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🌸 SYNOPSIS 🌸

void batadv_tp_batctl_error_notify (enum batadv_tp_meter_reason reason ,
const u8 *dst , struct batadv_priv *bat_priv , u32 cookie );

she returns void (so, no return value, she's giving "my work here is done, I don't owe you a status code" energy 💅) and she takes four arguments. four! not three, not five. we love a consistent queen 👑

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🦋 ARGUMENTS 🦋

• reason — the reason for tp meter session stop. like why are we stopping, bestie, what happened 😭 it's an enum batadv_tp_meter_reason, so it's one of those pre-approved reason vibes.
• dst — destination of tp_meter session. that's the const u8 * bestie, the address of where this whole session was headed 📍
• bat_priv — the bat priv with all the mesh interface information. the main character struct, the whole struct batadv_priv moment, holding literally everything the mesh interface knows 👑
• cookie — cookie of tp_meter session. a u32 cookie!! not a browser cookie, a session identifier, but honestly the metaphor tracks 🍪

ngl the argument list is short and sweet. nothing sketchy here. she knows exactly what she's about 💖

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🔥 SEE ALSO 🔥

okay this is the part where the manpage just absolutely dumps the whole friend group on you. like, every single one. here we go, no skipping, I promised 🫶

the constants (the batadv_tp.c lore) 🎀

• Kernel file ./net/batman-adv/tp_meter.c
• BATADV_TP_DEF_TEST_LENGTH(9)
• BATADV_TP_AWND(9)
• BATADV_TP_RECV_TIMEOUT(9)
• BATADV_TP_MAX_RTO(9)
• BATADV_TP_FIRST_SEQ(9)
• BATADV_TP_PLEN(9)
• BATADV_TP_MAX_UNACKED(9)

the session / window / rto girlies 💅

• batadv_tp_session_cookie(9)
• batadv_tp_cwnd(9)
• batadv_tp_update_cwnd(9)
• batadv_tp_update_rto(9)
• batadv_tp_batctl_notify(9)

sender-side crew 📤

• batadv_tp_list_find_sender(9)
• batadv_tp_list_active(9)
• batadv_tp_list_find_sender_session(9)
• batadv_tp_sender_release(9)
• batadv_tp_sender_put(9)
• batadv_tp_list_detach(9)
• batadv_tp_sender_cleanup(9)
• batadv_tp_sender_end(9)
• batadv_tp_sender_shutdown(9)
• batadv_tp_sender_stopped(9)
• batadv_tp_sender_finish(9)
• batadv_tp_reset_sender_timer(9)
• batadv_tp_sender_timeout(9)
• batadv_tp_fill_prerandom(9)
• batadv_tp_send_msg(9)

ack handling (the ✨drama✨) 🌈

• enum batadv_tp_ack_reaction(9)
• batadv_tp_handle_ack(9)
• batadv_tp_recv_ack(9)

sending + pacing 🧚

• batadv_tp_avail(9)
• batadv_tp_wait_available(9)
• batadv_tp_send(9)
• batadv_tp_start_kthread(9)
• batadv_tp_start(9)
• batadv_tp_stop(9)

receiver-side crew 📥

• batadv_tp_list_find_receiver_session(9)
• batadv_tp_receiver_release(9)
• batadv_tp_receiver_put(9)
• batadv_tp_reset_receiver_timer(9)
• batadv_tp_receiver_shutdown(9)
• batadv_tp_send_ack(9)
• batadv_tp_handle_out_of_order(9)
• batadv_tp_ack_unordered(9)
• batadv_tp_init_recv(9)
• batadv_tp_recv_msg(9)

the top-level meter entry points 🚪

• batadv_tp_meter_recv(9)
• batadv_tp_stop_all(9)
• batadv_tp_meter_init(9)

like I said. the whole group chat. every single one of them is in there, I checked twice 😭💜

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okay that's the page bestie, ily, go read the kernel source, mwah 💋

this lil doc ships from ./net/batman-adv, dated October 2026 — so yeah, fresh out the kernel, iconic behavior only 🎀✨