bpf_get_fsverity_digest(9)

💖 bpf_get_fsverity_digest(9) 💖

okay so welcome to the Kernel API Manual, bestie — today's main character is bpf_get_fsverity_digest(9). It's giving kernel API, it's giving fsverity, and we're reading this page together like the iconic little reference it is. ✨

🌸 NAME 🌸

bpf_get_fsverity_digest — read fsverity digest of file. That's the whole vibe: digest, file, done. 💅

🦋 SYNOPSIS 🦋

__bpf_kfunc int bpf_get_fsverity_digest (struct file *file , const
       struct bpf_dynptr *digest_p );

🎀 ARGUMENTS 🎀

• file — file to get digest from. Like, the actual file, bestie. 🍓
• digest_p — (out) dynptr for struct fsverity_digest. It's the out-param situation, so the digest info goes here. 🫶

🔥 DESCRIPTION 🔥

Read fsverity_digest of file into digest_ptr. That's the sentence, and honestly it ate. No cap. 😭

👑 RETURN 👑

0 on success, a negative value on error. So: happy path = 0; sad path = negative value. Periodt. 💀

🌈 SEE ALSO 🌈

Peep the Kernel file ./fs/verity/measure.c, plus fsverity_ioctl_measure(9) and fsverity_get_digest(9). iykyk. 🧚

xoxo, your Unix bestie 💖 — from the ./fs/verity source/version corner, dated October 2026. 🎀