_ctl_diag_register_2(9)

📦 version 7.3.1, in nixpkgs unstable

💫 _ctl_diag_register_2 — a.k.a. the mpt3sas_ctl(9) page you're literally reading rn ✨

okay bestie, welcome to the kernel API manual for _ctl_diag_register_2 — yes it's a section 9 page, yes it's a mouthful, no we're not skipping it 💅

🌸 NAME 🌸

_ctl_diag_register_2 — the wrapper for registering diag buffer support 🎀

like, it's the little delegating girly whose whole personality is "go ask the real function" and honestly? iconic 🫶

🦋 SYNOPSIS 🦋

long _ctl_diag_register_2 (struct MPT3SAS_ADAPTER *ioc , struct
mpt3_diag_register *diag_register );

that's the whole signature, no cap — a long return, two pointer args, and it's giving "middle manager energy" 😭

✨ ARGUMENTS ✨

  • ioc — the per adapter object 💖 this is your adapter's whole situation, the one and only struct MPT3SAS_ADAPTER * you're working with.
  • diag_register — the diag_register struct passed in from user space 🌈 yes, user space, so be normal about it — this is the struct mpt3_diag_register * travelling down from userspace into the kernel.

lowkey that's the entire argument list, two items, slay 🎀

🔥 SEE ALSO 🔥

okay so this list is long long, but every single one of these is a real reference and we are NOT skipping any of them, periodt 👑

First up, the kernel file itself:

Kernel file ./drivers/scsi/mpt3sas/mpt3sas_ctl.c — that's where the magic lives, bestie 📁

then enum block_state(9), and then the whole extended friend group:

see? told you. all of them. every last one. main character energy from the entire mpt3sas friend group 💀💖

ngl bestie, there aren't any extra flags, exit statuses or environment variables hiding in this one — the whole page is the two arguments and that absolutely enormous SEE ALSO list. don't go inventing options that aren't there 🙈

and that's the vibe check, we're done!! this page ships from ./drivers/scsi/mpt3sas, dated October 2026, and it's filed under the _ctl_diag_register_2(9) section 9 manual — so like, cite it properly when you write your essay 🎀🦋✨

📦 where this page comes from