__rcu_deref...a_with_flags(9)

🌸 NAME 🌸

okay so bestie, welcome to the __rcu_deref...a_with_flags(9) page in the Kernel API Manual — yes, the manual name is doing the absolute most, but we move. 💅 This function is __rcu_dereference_sk_user_data_with_flags, and its whole vibe is: return the pointer only if the argument flags all has been set in sk_user_data. Otherwise? It returns NULL. No cap. Periodt. 😭✨

✨ SYNOPSIS ✨

void * __rcu_dereference_sk_user_data_with_flags (const struct sock *sk
, uintptr_t flags );

🎀 ARGUMENTS 🎀

• sk — socket. That’s the socket we’re inspecting, the main character of this little pointer check. 🧚
• flags — flag bits. These are the bits that all have to be set in sk_user_data for the pointer to come through; otherwise it’s a NULL situation. 🫶

🔥 SEE ALSO 🔥

aww yes, the friend group — every single one of these cuties is linked from the original page, so here they all are:

• Kernel file ./include/net/sock.h
• struct sock_common(9)
• struct sock(9)
• sk_user_data_is_nocopy(9)
• __locked_read_sk_user_data_with_flags(9)
• sk_for_each_entry_offset_rcu(9)
• SOCK_CONNECT_BIND(9)
• lock_sock_fast(9)
• unlock_sock_fast(9)
• sk_wmem_alloc_get(9)
• sk_rmem_alloc_get(9)
• sk_has_allocations(9)
• skwq_has_sleeper(9)
• sock_poll_wait(9)
• sk_page_frag(9)
• _sock_tx_timestamp(9)
• sk_eat_skb(9)

signed off from ./include/net, dated October 2026, with the __rcu_deref...a_with_flags(9) manual name glittered across the bottom. mwah 💋✨