STRUCT BATADV_PRIV_TT(9)

💖 struct batadv_priv_tt(9) 💖

okay so bestie, welcome to the kernel API manual for struct batadv_priv_tt — it's the per mesh interface translation table data, and honestly it's giving very main character energy in the batman-adv world. let's get into it 🦋

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✨ NAME ✨

struct batadv_priv_tt — per mesh interface translation table data 🎀

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🌸 SYNOPSIS 🌸

struct batadv_priv_tt {
    atomic_t vn;
    atomic_t ogm_append_cnt;
    size_t local_changes;
    struct list_head changes_list;
    struct batadv_hashtable *local_hash;
    struct batadv_hashtable *global_hash;
    struct hlist_head req_list;
    struct list_head roam_list;
    spinlock_t changes_list_lock;
    spinlock_t req_list_lock;
    spinlock_t roam_list_lock;
    unsigned char *last_changeset;
    u16 last_changeset_len;
    spinlock_t last_changeset_lock;
    spinlock_t commit_lock;
    struct delayed_work work;
 };

look at her. seventeen fields. absolutely iconic behavior 💅

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👑 MEMBERS 👑

• vn — the translation table version number. it's literally the vibe check number for the whole table ✨
• ogm_append_cnt — a counter of the number of OGMs containing the local tt diff. keeping count, no cap 📊
• local_changes — the changes registered in an originator interval. lowkey tracking everything you did this round 🫶
• changes_list — tracks tt local changes within an originator interval. it's the receipts list for this window 🧾
• local_hash — the local translation table hash table. your home turf 🌸
• global_hash — the global translation table hash table. the whole wide mesh 🌈
• req_list — list of pending & unanswered tt_requests. the "left on read" pile 😭
• roam_list — list of the last roaming events of each client, and it limits the number of roaming events to avoid route flapping. she's setting boundaries so nobody flips out 🦋
• changes_list_lock — lock protecting changes_list & local_changes. do not touch without the lock, fr fr 🔒
• req_list_lock — lock protecting req_list. 🔐
• roam_list_lock — lock protecting roam_list. 🗝️
• last_changeset — the last tt changeset this host has generated. proud of her output ngl ✨
• last_changeset_len — the length of the last tt changeset this host has generated. yes, size matters, it's a u16 📏
• last_changeset_lock — lock protecting last_changeset & last_changeset_len. 🔏
• commit_lock — this one prevents from executing a local TT commit while reading the local table. the local TT commit is made up of two operations (data structure update and metadata -CRC/TTVN- recalculation) and they have to be executed atomically in order to avoid another thread to read the table/metadata between those. that's right — atomically, bestie, no sneaky mid-commit reads allowed 💀🔥
• work — work queue callback item for translation table purging. she cleans up on a delay, on brand 🧹

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🫶 SEE ALSO 🫶

Kernel file ./net/batman-adv/types.h, plus this whole friend group right here:

• batadv_dat_addr_t(9)
• enum batadv_dhcp_recipient(9)
• BATADV_TT_REMOTE_MASK(9)
• BATADV_TT_SYNC_MASK(9)
• struct batadv_ogm_buf(9)
• struct batadv_hard_iface_bat_iv(9)
• enum batadv_v_hard_iface_flags(9)
• struct batadv_hard_iface_bat_v(9)
• enum batadv_hard_iface_wifi_flags(9)
• struct batadv_wifi_net_device_state(9)
• struct batadv_hard_iface(9)
• struct batadv_orig_ifinfo_bat_iv(9)
• struct batadv_orig_ifinfo(9)
• struct batadv_frag_table_entry(9)
• struct batadv_frag_list_entry(9)
• struct batadv_vlan_tt(9)
• struct batadv_orig_node_vlan(9)
• struct batadv_orig_bat_iv(9)
• struct batadv_orig_node(9)
• enum batadv_orig_capabilities(9)
• struct batadv_gw_node(9)
• struct batadv_hardif_neigh_node_bat_v(9)
• struct batadv_hardif_neigh_node(9)
• struct batadv_neigh_node(9)
• struct batadv_neigh_ifinfo_bat_iv(9)
• struct batadv_neigh_ifinfo_bat_v(9)
• struct batadv_neigh_ifinfo(9)
• struct batadv_bcast_duplist_entry(9)
• enum batadv_counters(9)
• struct batadv_priv_bla(9)
• struct batadv_priv_gw(9)
• struct batadv_priv_tvlv(9)
• struct batadv_priv_dat(9)
• struct batadv_mcast_querier_state(9)
• struct batadv_mcast_mla_flags(9)
• struct batadv_priv_mcast(9)
• struct batadv_tp_unacked(9)
• struct batadv_tp_vars_common(9)
• struct batadv_tp_sender_cc(9)
• struct batadv_tp_sender(9)
• struct batadv_tp_receiver(9)
• struct batadv_meshif_vlan(9)
• struct batadv_priv_bat_v(9)
• struct batadv_priv(9)
• enum batadv_bla_backbone_gw_state(9)
• struct batadv_bla_backbone_gw(9)
• struct batadv_bla_claim(9)
• struct batadv_tt_common_entry(9)
• struct batadv_tt_local_entry(9)
• struct batadv_tt_global_entry(9)
• struct batadv_tt_orig_list_entry(9)
• struct batadv_tt_change_node(9)
• struct batadv_tt_req_node(9)
• struct batadv_tt_roam_node(9)
• struct batadv_skb_cb(9)
• struct batadv_forw_packet(9)
• struct batadv_algo_iface_ops(9)
• struct batadv_algo_neigh_ops(9)
• struct batadv_algo_orig_ops(9)
• struct batadv_algo_gw_ops(9)
• struct batadv_algo_ops(9)
• struct batadv_dat_entry(9)
• struct batadv_hw_addr(9)
• struct batadv_dat_candidate(9)
• struct batadv_tvlv_container(9)
• struct batadv_tvlv_handler(9)
• enum batadv_tvlv_handler_flags(9)

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that's the whole list, bestie — every single one of them, no skips, iykyk 🫶

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and that's a wrap! 🌈 this page lives under ./net/batman-adv, and it's dated October 2026 — so yes, she's from the future, and she ate. 💅✨🎀🦋