ib_no_udata_io(9)

💖 ib_no_udata_io(9) 💖

Okay so bestie, welcome to the Kernel API Manual side of the group chat. This page is about ib_no_udata_io, and its whole thing is: Ensure no input data and zero fill the response buffer. Main character energy for a compatibility helper, honestly. ✨

🌸 NAME 🌸

ib_no_udata_io — Ensure no input data and zero fill the response buffer

🎀 SYNOPSIS 🎀

int ib_no_udata_io (struct ib_udata *udata );

💅 ARGUMENTS 💅

• udata — The system call's ib_udata struct. That's the one and only argument, bestie. 🫶

🦋 DESCRIPTION 🦋

Driver ops that don't accept any input data and don't provide any response data may call this at the beginning of their handler. Why? To fully adhere to the uAPI forward/backward compatibility rules. That's the whole vibe: no input data, no response data, just compatibility excellence. 😌

💜 RETURN 💜

Negative failure code if the op should be denied, 0 otherwise. So if it's a no-go, you get a negative failure code; if it's all good, you get 0. Slay, fr fr. 💀

🌈 SEE ALSO 🌈

Kernel file ./include/rdma/uverbs_ioctl.h — and the see-also squad is uverbs_attr_get_uobjs_arr(9), ib_copy_validate_udata_in(9), ib_copy_validate_udata_in_cm(9), ib_is_udata_in_empty(9), ib_respond_udata(9), and ib_respond_empty_udata(9). Go read those next, iykyk. 🧚

With love from ./include/rdma, dated October 2026, for ib_no_udata_io(9) 💖