move_addr_to_kernel(9)

💅 move_addr_to_kernel(9) — a Kernel API Manual moment

okay bestie, welcome to the Kernel API Manual 💖 this one's a little kernel-space baddie called move_addr_to_kernel and tbh she's giving "small function, big responsibilities." let's get into it 🎀

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✨ NAME ✨

move_addr_to_kernel — copy a socket address into kernel space 🫶

like, she takes your lil user-space address and yeets it over to kernel space. that's the whole vibe. no cap.

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✨ SYNOPSIS ✨

int move_addr_to_kernel (void __user *uaddr , int ulen , struct
       sockaddr_storage *kaddr );

lowkey iconic signature ngl 💅

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✨ ARGUMENTS ✨

• uaddr — the address in user space 🌸 this is the one you're handing over
• ulen — the length in user space 📏 how much of it we're dealing with
• kaddr — the address in kernel space 👑 this is where it's going, bestie

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✨ DESCRIPTION ✨

so here's the tea ☕ the address gets copied into kernel space. that's it, that's the job, and honestly? she ate.

but listen, there are rules (there are always rules 🙈):

• if the address you provided is too long, you get an error code of -EINVAL back 💀
• if the copy gives invalid addresses, you get -EFAULT 😭
• and on a success, you get 0 back ✨ slay

heads up bestie: those first two are error paths, not victories. don't go celebrating a -EINVAL, i'm begging 🙏

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✨ SEE ALSO ✨

she doesn't work alone, she's got a whole friend group 🫶 and it is long, so buckle up:

Kernel file ./net/socket.c move_addr_to_user(9), sock_read_xattr(9), sock_alloc_file(9), sock_from_file(9), sockfd_lookup(9), sock_alloc(9), sock_release(9), sock_sendmsg(9), kernel_sendmsg(9), sock_recvmsg(9), kernel_recvmsg(9), sock_create_lite(9), __sock_create(9), sock_create(9), sock_create_kern(9), sock_register(9), sock_unregister(9), kernel_bind(9), kernel_listen(9), kernel_accept(9), kernel_connect(9), kernel_getsockname(9), kernel_getpeername(9), kernel_sock_shutdown(9), kernel_sock_ip_overhead(9)

like i said. whole friend group. main character energy all around 👑

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💖 that's the whole page bestie, go forth and copy those socket addresses responsibly 💖

this little love letter lives in the ./net source tree, dated October 2026, and it's filed under move_addr_to_kernel(9) 🦋 mwah, bye ✨