scsi_device_lookup(9)

📦 version 7.3.1, in nixpkgs unstable

✨ scsi_device_lookup(9) ✨

okay so real talk, this one is from the Kernel API Manual (yes, the kernel has lore 💅) and it's genuinely iconic: scsi_device_lookup — find a device given the host. bestie, it's giving "where's my SCSI device" but make it a function call 🦋

🌸 NAME 🌸

scsi_device_lookup — find a device given the host 🔍

🎀 SYNOPSIS 🎀

struct scsi_device * scsi_device_lookup (struct Scsi_Host *shost , uint
channel , uint id , u64 lun );

💖 ARGUMENTS 💖

  • shost — the SCSI host pointer, aka the main character of this whole operation 👑
  • channel — the SCSI channel (it's zero if there's only one channel, so don't overthink it)
  • id — the SCSI target number (the physical unit number, for the record)
  • lun — the SCSI Logical Unit Number, no cap

🌈 DESCRIPTION 🌈

So what it does: it looks up the scsi_device with the specified channel, id, lun for a given host. literally that's it, that's the vibe check ✨

⚠️ okay listen, this part is important: the returned scsi_device has an additional reference that needs to be released with scsi_device_put once you're done with it. not me reminding you to clean up your references 😭 if you forget, that's a leak and the kernel will simply not be slaying. release it, periodt 💅

🦋 SEE ALSO 🦋

Kernel file ./drivers/scsi/scsi.c — and like, all of these besties:

and that's the whole page, bestie 🫶 this one lives in ./drivers/scsi and it's dated October 2026 — so mark your calendars, screenshot it, whatever you gotta do 💜 iykyk 🧚

📦 where this page comes from