upper_size_to_lower_size(9)

💖 NAME 💖

okay so bestie, welcome to the Kernel API Manual 💅 this page is upper_size_to_lower_size(9), and the name line is literally upper_size_to_lower_size - — yes, the description after that dash is empty, and honestly? mysterious main character energy 🕵️‍♀️✨.

📐 SYNOPSIS 📐

loff_t upper_size_to_lower_size (struct ecryptfs_crypt_stat *crypt_stat
, loff_t upper_size );

🧸 ARGUMENTS 🧸

• crypt_stat — Crypt_stat associated with file 🫶
• upper_size — size of the upper file 🌸

🧮 DESCRIPTION 🧮

So the whole vibe is: calculate the required size of the lower file based on the specified size of the upper file ✨. This calculation is based on the number of headers in the underlying file and the extent size — no cap, that's the math 🧚💜.

Returns Calculated size of the lower file. periodt 💅

👀 SEE ALSO 👀

Kernel file ./fs/ecryptfs/inode.c plus the whole friend group:

• ecryptfs_interpose(9)
• ecryptfs_do_create(9)
• ecryptfs_lookup(9)
• __ecryptfs_truncate(9)
• ecryptfs_truncate(9)
• ecryptfs_setattr(9)

and that's the tea ☕ source/version is ./fs/ecryptfs, dated October 2026, title upper_size_to_lower_size(9). bye bestie, go calculate those sizes 💖🦋✨