zfcp_diag_adapter_setup(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 zfcp_diag_adapter_setup(9) — kernel API manual, bestie edition 🌸

okay so picture this: it's a zfcp_diag_adapter_setup(9) moment and you're holding the manual from the Kernel API Manual section nine, and honestly? it's giving "small function, big responsibility." let's get into it 💅

✨ NAME ✨

zfcp_diag_adapter_setup — setting up the storage for adapter diagnostics, periodt. that's the whole job and she does it 🎀

🦋 SYNOPSIS 🦋

int zfcp_diag_adapter_setup (struct zfcp_adapter *const adapter );

look at her. one argument, one int return, zero drama (mostly) ✨

💖 ARGUMENTS 💖

  • adapter — the adapter you're setting up diagnostics for. that's your girl. that's the main character of this whole page 👑

🔥 DESCRIPTION 🔥

So what's actually happening here? zfcp_diag_adapter_setup creates the data-structures that store the diagnostics for an adapter. that's it, that's the vibe — it's the setup step, the "let me build you a little home for your diagnostic data" moment 🏠✨

but ngl, here's the part you cannot skip:

⚠️ this overwrites whatever was stored before at zfcp_adapter->diagnostics! like, full replacement. no merge, no "keeps your old stuff safe," nothing. the previous contents are GONE. so if you had something living there before, it's not surviving this call 😭

🌈 RETURN 🌈

  • 0 — everything is OK. we slayed. the setup worked 💖
  • -ENOMEM — could not allocate all of or parts of the data-structures. and here's the good-ish news: zfcp_adapter->diagnostics remains unchanged in that case, so nothing got nuked. she tried, she couldn't allocate, she left your data alone 🫶

👑 SEE ALSO 👑

go read the kernel file ./drivers/s390/scsi/zfcp_diag.c — that's where the actual source lives, iykyk 📁 and then check out her whole friend group:

they all hang out together, it's a whole ecosystem 💜

💀 quick reminder bestie: the overwrite thing is real. zfcp_adapter->diagnostics gets replaced, not merged. do not come crying to me later, I literally told you 🙈

and that's the page!! this one comes to you from ./drivers/s390/scsi, dated October 2026, and it's zfcp_diag_adapter_setup(9) — go forth and set up those diagnostics, you absolute icon ⭐🧚💜

📦 where this page comes from