ceph_fscrypt_decrypt_pages(9)

💖 ceph_fscrypt_decrypt_pages(9) 💖

okay bestie, welcome to the Kernel API Manual entry for ceph_fscrypt_decrypt_pages — yes that's a mouthful, yes it's iconic, let's get into it 🫶

---

✨ NAME ✨

ceph_fscrypt_decrypt_pages — decrypt an array of pages 💅

---

✨ SYNOPSIS ✨

int ceph_fscrypt_decrypt_pages (struct inode *inode , struct page **page
, u64 off , int len );

like, that's the whole vibe check right there ✨

---

✨ ARGUMENTS ✨

• inode — pointer to the inode that's associated with these pages 🎀
• page — pointer to the page array, aka the whole squad of pages 🌸
• off — offset into the file where the read data starts, so it knows where the party begins 💫
• len — max length to decrypt, the ceiling on how much we're doing here 🦋

---

✨ DESCRIPTION ✨

so basically: decrypt an array of fscrypt'ed pages and return the amount of data decrypted ✨ like it hands you back a number and you're like "slay, thank you" 💖

here's the tea though — any data in the page prior to the start of the first complete block in the read is ignored 🙈. and any incomplete crypto blocks at the end of the array are ignored too — and ngl, the caller should probably zero those out, that's on you bestie 😭

Returns the length of the decrypted data or a negative errno. no cap, that's the return value. 🔥

---

✨ SEE ALSO ✨

kernel file ./fs/ceph/crypto.c — go read it, it's giving main character energy 👑

• ceph_fname_to_usr(9)
• ceph_fscrypt_prepare_readdir(9)
• ceph_fscrypt_decrypt_extents(9)
• ceph_fscrypt_encrypt_pages(9)

---

and that's the page, bestie 🎀 sign-off time: this lil beauty lives in ./fs/ceph, dated October 2026, and it's literally the ceph_fscrypt_decrypt_pages(9) manual page — periodt 💅✨💜