ext4_blks_to_allocate(9)

📦 version 7.3.1, in nixpkgs unstable

✨ ext4_blks_to_allocate ✨

okay bestie, so this one lives in the Kernel API Manual and honestly? it's giving "small function, big responsibilities" 💅 the way it just... peeks at the block map and counts up how many direct blocks you're gonna need for whatever branch you hand it. icon behavior, no cap 🎀

🌸 SYNOPSIS 🌸

int ext4_blks_to_allocate (Indirect *branch , int k , unsigned int blks
, int blocks_to_boundary );

like, that's the whole signature. four args, one int back, zero drama ✨

🦋 ARGUMENTS 🦋

  • branch — the chain of indirect blocks, aka the little lineup you're working with 🫶
  • k — how many blocks you need for the indirect blocks themselves
  • blks — the number of data blocks to be mapped
  • blocks_to_boundary — the offset inside the indirect block 📍

💖 DESCRIPTION 💖

so what does it actually do? it returns the total number of blocks to be allocated, and yes that includes both the direct blocks and the indirect blocks — it's an all-inclusive count, bestie, nothing left out 👑

literally just: "how many blocks am I allocating here, total?" and it tells you. main character energy fr fr 💅

🔥 SEE ALSO 🔥

the whole squad, all in the kernel file ./fs/ext4/indirect.c:

like, go read those too, they're all part of the same friend group 🌈

that's the whole page, bestie — shoutout to the ./fs/ext4 gang, this one's dated October 2026, and the manual section is ext4_blks_to_allocate(9) for whenever you need to find her again 💜🦋✨

📦 where this page comes from