fsverity_ioctl_measure(9)

👑 fsverity_ioctl_measure(9) — Kernel API Manual 👑

okay bestie, welcome to the fsverity_ioctl_measure(9) page in the Kernel API Manual ✨ this one is short, sweet, and very “kernel said measure the vibes” 💅

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💖 NAME 💖

fsverity_ioctl_measure — get a verity file’s digest 🎀

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✨ SYNOPSIS ✨

int fsverity_ioctl_measure (struct file *filp , void __user *_uarg );

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🎀 ARGUMENTS 🎀

• filp — the file to get the digest of 🫶
• _uarg — user pointer to fsverity_digest 🌸

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🦋 DESCRIPTION 🦋

Retrieve the file digest that the kernel is enforcing for reads from a verity file 🔥

The full documentation lives in the FS_IOC_MEASURE_VERITY section of Documentation/filesystems/fsverity.rst — go read that for the details, iykyk 📚✨

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🔥 RETURN 🔥

• 0 on success 🎉
• -errno on failure 😭

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🌈 SEE ALSO 🌈

• Kernel file ./fs/verity/measure.c 🧚
• fsverity_get_digest(9) ⭐
• bpf_get_fsverity_digest(9) 💜

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Bye bestie! This page comes from ./fs/verity, dated October 2026, and it’s the fsverity_ioctl_measure(9) manual page — mwah 💖💅