STRUCT MESH_TX_CACHE(9)

💅 struct mesh_tx_cache(9)

okay bestie, welcome to the Kernel API Manual, section 9 — we're doing a little tour of struct mesh_tx_cache today and honestly? it's giving "small struct, big job" energy ✨

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🌸 NAME 🌸

struct mesh_tx_cache — the mesh fast xmit header cache 🚀

like, it literally caches headers so mesh transmission can go zoom. no cap.

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🎀 SYNOPSIS 🎀

struct mesh_tx_cache {
    struct rhashtable rht;
    struct hlist_head walk_head;
    spinlock_t walk_lock;
 };

three fields. that's it. she's compact and she knows it 💅

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🦋 Members 🦋

• rht — the hash table holding struct ieee80211_mesh_fast_tx objects, and it's keyed on the skb DA. yep, destination address as the key, iykyk 🔑
• walk_head — a linked list that contains all the ieee80211_mesh_fast_tx objects. every single one. she keeps track of everybody 🫶
• walk_lock — the lock protecting walk_head and rht. both of them. do not touch either one without her, fr fr 🔒

ok so quick vibe check: walk_lock guards two things at once, so if you're poking at the list or the table, that's the lock you need. no skipping 💀

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🌈 SEE ALSO 🌈

the whole friend group, in order:

• Kernel file ./net/mac80211/ieee80211_i.h enum
• ieee80211_bss_corrupt_data_flags(9)
• enum ieee80211_bss_valid_data_flags(9)
• enum ieee80211_packet_rx_flags(9)
• enum ieee80211_rx_flags(9)
• struct ieee80211_if_ocb(9)
• struct ieee80211_mesh_sync_ops(9)
• struct mesh_table(9)
• enum ieee80211_sub_if_data_flags(9)
• enum ieee80211_sdata_state_bits(9)
• enum ieee80211_chanctx_mode(9)
• enum ieee80211_chanctx_replace_state(9)
• struct txq_info(9)
• struct ieee80211_if_nan(9)
• struct ieee80211_if_nan_data(9)
• enum mac80211_scan_flags(9)
• enum mac80211_scan_state(9)
• ieee80211_parse_ch_switch_ie(9)
• struct ieee80211_elems_parse_params(9)

go read them all bestie, they're all main characters in their own way 👑

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anyway that's the whole page, you ate that 🍓 this little icon lives over in ./net/mac80211, and she was documented in October 2026 under the title struct mesh_tx_cache(9) — mwah, see you in the next manpage 💖✨🎀