VIRTIO_SCSI(4)

📦 version 15.1, in freebsd 14.5, freebsd 15.1, nixpkgs unstable

💅 VIRTIO_SCSI 💅

okay so bestie, this is the virtio_scsi manual page — it lives in the Kernel Interfaces Manual section, and it's giving very specific "I only talk to virtual machines" energy. Let's get into it ✨

🌸 NAME 🌸

virtio_scsi — the VirtIO SCSI driver, aka the little guy that lets your kernel talk to VirtIO SCSI devices 🦋

🎀 SYNOPSIS 🎀

So you wanna compile this driver into the kernel? iconic. drop these lines into your kernel configuration file:

device virtio_scsi

or, if you'd rather load it as a module at boot time (lowkey the easier vibe), put this line in loader.conf(5):

virtio_scsi_load="YES"

✨ DESCRIPTION ✨

The virtio_scsi device driver provides support for VirtIO SCSI devices. that's it, that's the whole thing, and honestly? she ate. 💅

🧚 LOADER TUNABLES 🧚

Tunables can be set at the loader(8) prompt before booting the kernel, or stored in loader.conf(5). very much your choice, bestie 🌈

  • hw.vtscsi.bus_reset_disable — ngl this one has lore 😭 In the initial QEMU release with VirtIO SCSI support, in-flight operations were not aborted when stopping the device, which rendered bus reset ineffective. so this tunable disables attempts to issue reset bus commands. The default value is 1. periodt.

💀 DEBUGGING 💀

Wanna enable debugging prints from the virtio_scsi driver? set this variable:

hw.vtscsi.X.debug_level

where X is the adapter number — either in loader.conf(5) or via sysctl(8). and here's the bit breakdown, iykyk:

  • 0x01 — Enable informational prints.
  • 0x02 — Enable prints for driver errors.
  • 0x04 — Enable tracing prints.
fr fr, it's a bitmask, so you can stack them. the manpage doesn't say that but like… 0x01 + 0x02 = 0x03. okay moving on 🙈

🫶 SEE ALSO 🫶

👑 HISTORY 👑

The virtio_scsi driver was written by Bryan Venteicher <bryanv@FreeBSD.org>. It first appeared in FreeBSD 10.0. main character energy tbh 🎀

and that's the whole page, bestie 💖 this one came from the Debian gang, dated June 24, 2012, and it's filed under VIRTIO_SCSI(4) in the Kernel Interfaces Manual — go forth and virtualize slayfully 🌸✨

📦 where this page comes from