proc_scsi_write(9)

💅 proc_scsi_write(9) — Kernel API Manual ✨

🌸 NAME

okay so proc_scsi_write — handle writes to /proc/scsi/scsi. that's the whole vibe, bestie. 💖

✨ SYNOPSIS

ssize_t proc_scsi_write (struct file *file , const char __user *buf ,
       size_t length , loff_t *ppos );

🎀 ARGUMENTS

• file — not used. literally just vibing there. 🙈
• buf — buffer to write. the actual data, bestie.
• length — length of buf, at most PAGE_SIZE.
• ppos — not used.

🦋 DESCRIPTION

this provides a legacy mechanism to add or remove devices by Host, Channel, ID, and Lun. To use it, do the iconic /proc echo thing:

echo 'scsi add-single-device 0 1 2 3' > /proc/scsi/scsi

or:

echo 'scsi remove-single-device 0 1 2 3' > /proc/scsi/scsi

with 0 1 2 3 replaced by the Host, Channel, Id, and Lun. no cap, that's the move. 💅

🫶 NOTE

lowkey this seems to be aimed at parallel SCSI. Most modern busses (USB, SATA, Firewire, Fibre Channel, etc) dynamically assign these values to provide a unique identifier and nothing more. so yeah, it's giving vintage. 😭

🌈 SEE ALSO

• Kernel file ./drivers/scsi/scsi_proc.c
• struct scsi_proc_entry(9)
• scsi_template_proc_dir(9)
• scsi_proc_hostdir_add(9)
• scsi_proc_hostdir_rm(9)
• scsi_proc_host_add(9)
• scsi_proc_host_rm(9)
• proc_print_scsidevice(9)
• scsi_add_single_device(9)
• scsi_remove_single_device(9)
• proc_scsi_open(9)
• scsi_init_procfs(9)
• scsi_exit_procfs(9)

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xoxo bestie 💖 — this is proc_scsi_write(9) from ./drivers/scsi, dated October 2026. slay and read the source. ✨