zfcp_diag_u..._data_buffer(9)

📦 version 7.3.1, in nixpkgs unstable

💅 zfcp_diag_update_config_data_buffer(9) 💅

okay so bestie, we're in the Kernel API Manual today (yes, the zfcp_diag_u..._data_buffer(9) one, the name's a little truncated but she's iconic, we don't judge) and honestly? this one's lowkey important. sit down, hydrate, let's get into it 🫶

✨ NAME ✨

zfcp_diag_update_config_data_buffer — the actual implementation of &typedef zfcp_diag_update_buffer_func, here to collect and update Config Data. that's her job, that's what she does 💅

🌸 SYNOPSIS 🌸

int zfcp_diag_update_config_data_buffer (struct zfcp_adapter *const
adapter );

🎀 ARGUMENTS 🎀

  • adapter — the Adapter we're collecting Config Data from. that's the one. the source of truth. the main character of this function call ✨

🔥 DESCRIPTION 🔥

so here's the thing you NEED to know, and I mean need:

this call is SYNCHRONOUS 🚨

not me having to say it with the exclamation mark and everything — the original does This call is SYNCHRONOUS ! and honestly the drama is justified. it blocks until the respective command has finished completely, or has failed in some way. so no, you can't just yeet this off and go do something else. she will hold you there until she's done. periodt 💀

⭐ RETURN ⭐

  • 0 — Successfully retrieved new Diagnostics and Updated the buffer, which also includes the cases where data was retrieved but came back incomplete 😭. bestie, that means you'll have to check the flag incomplete of struct zfcp_diag_header yourself. zero doesn't always mean "perfect", it means "she did her thing" 🫶
  • see zfcp_fsf_exchange_config_data_sync for possible error-codes (💀 excluding -EAGAIN 💀 — she's not even invited to the error-code party)

🦋 SEE ALSO 🦋

go check out the Kernel file ./drivers/s390/scsi/zfcp_diag.c, and while you're there, give some love to the whole friend group:

all of them serve 💜

kisses and best of luck with your synchronous blocking, bye bestie 🧚✨ — sourced straight from ./drivers/s390/scsi, dated October 2026, and your girl zfcp_diag_u..._data_buffer(9) says goodnight 🌈👑

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