LINSYSFS(4)

💅 LINSYSFS(4) — the linsysfs situation, explained

okay bestie, so this is a page from the Kernel Interfaces Manual and it's all about linsysfs — the Linux kernel objects file system. stick with me, it's actually slay 🫶

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✨ NAME ✨

linsysfs — Linux kernel objects file system. yes that's the whole vibe. iconic, brief, to the point 💅

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🌸 SYNOPSIS 🌸

linsysfs                /compat/linux/sys       linsysfs        rw 0 0

that's the fstab-style line, keep it exactly like that, no cap 🎀

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💖 DESCRIPTION 💖

so the Linux system file system (aka linsysfs) emulates a subset of the Linux sys file system, and ngl it's literally required for the complete operation of some Linux binaries. like, without it those binaries are not okay 😭

linsysfs gives you a two-level view of devices, bestie. at the highest level, PCI devices themselves are named, according to their bus, slot and function in the system hierarchy. and PCI storage devices? they're listed in the scsi_host class with a device symlink pointing to the PCI directories of the devices. it's giving organized 💅

so, each device node is a directory containing some files and directories:

• host — a place holder for storage host information. literally just holding space, main character energy 🧚
• pci_id — a directory for the pci_id that contains either the device information or another directory structure for a PCI bridge. nesting!! we love to see it 🦋

and each host node of scsi_host is a directory containing some files and directories:

• proc_name — the Linux registered driver name for these devices. name drop 💅
• device — a symlink to the PCI device directory. follow the link bestie ✨

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🎀 FILES 🎀

• /compat/linux/sys — the normal mount point for linsysfs. your home base 🏠
• /compat/linux/sys/class/scsi_host — the storage host node 👑
• /compat/linux/sys/devices/pci0000:00 — the PCI device hierarchy node 🌈

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🔥 EXAMPLES 🔥

the most common usage follows:

mount -t linsysfs linsysfs /compat/linux/sys

where /compat/linux/sys is a mount point. that's it, that's the whole move 💅

fr fr just copy that line and you're set, no gatekeeping here 🫶

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💜 SEE ALSO 💜

nmount(2), unmount(2), linprocfs(4), linux(4), pseudofs(9)

go read those next, iykyk 📚

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⭐ HISTORY ⭐

the linsysfs driver first appeared in FreeBSD 6.2. vintage but make it current 💀✨

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🌸 AUTHORS 🌸

the linsysfs driver was derived from linprocfs by Doug Ambrisko. and this manual page was edited by Doug Ambrisko, based on the linprocfs(4) manual page by Garrett Wollman. team effort, we love a collab 🫶👑

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and that's the tea, bestie 🍓 this page came from Debian and it's dated November 13, 2019 — so if anyone asks, you heard it here first. mwah 💋💖