STRUCT UDP_HSLOT_MAIN(9)

🦋 NAME 🦋

okay so bestie, welcome to the Kernel API Manual ✨ — this page is struct udp_hslot_main, and it's literally the UDP hash slot used by udp_table.hash2. that's the whole vibe. main character energy for the networking stack fr fr 💅

🌸 SYNOPSIS 🌸

the way it's giving struct realness:

struct udp_hslot_main {
    struct udp_hslot        hslot;
  #if !IS_ENABLED(CONFIG_BASE_SMALL);
    u32 hash4_cnt;
  #endif;
 };

ngl copy this exactly as it's written, semicolons after #if and #endif and all — that's just how it appears here, so keep it character for character, no cap 🎀

🎀 Members 🎀

• hslot — the basic hash slot. that's it, that's the whole thing, she's the foundation 🫶
• hash4_cnt — number of sockets in hslot4 of the same (local port, local address). literally counting her little socket besties 💖

heads up babes: hash4_cnt is wrapped in #if !IS_ENABLED(CONFIG_BASE_SMALL);, so when that config situation flips, she's simply not invited to the struct 🔥

💫 SEE ALSO 💫

go read these next, i'm obsessed:

• Kernel file ./include/net/udp.h
• struct udp_skb_cb(9)
• struct udp_hslot(9)
• struct udp_table(9)
• udp_csum_outgoing(9)

okay that's the page! 🎀 this whole thing lives in ./include/net, dated October 2026, and it's filed under struct udp_hslot_main(9) — slay, go read the other structs now, iykyk ✨💜🌷