STRUCT UDP_HSLOT(9)

💅 NAME 💅

okay so welcome to the struct udp_hslot(9) page from the Kernel API Manual, bestie. This is literally all about struct udp_hslot — the UDP hash slot used by udp_table.hash/hash4. no cap, that's the whole vibe. ✨

✨ SYNOPSIS ✨

here's the struct in all its glory, copied exactly so you don't have to squint:

       struct udp_hslot {
           union {
             struct hlist_head       head;
             struct hlist_nulls_head nulls_head;
           };
           int count;
           spinlock_t lock;
        };

🎀 Members 🎀

• {unnamed_union} — anonymous. that's what the page says, bestie: anonymous. it's giving mysterious main character energy. 🫶
• head — head of list of sockets.
• nulls_head — head of list of sockets, only used by hash4.
• count — number of sockets in 'head' list.
• lock — spinlock protecting changes to head/count.

🌈 SEE ALSO 🌈

kernel file ./include/net/udp.h, plus these other pages you should totally go read:

• struct udp_skb_cb(9)
• struct udp_hslot_main(9)
• struct udp_table(9)
• udp_csum_outgoing(9)

okay bye bestie 💖 this page is from ./include/net, dated October 2026, and it's literally struct udp_hslot(9) — periodt. 🌸🦋👑