do_truncation(9)

🎀 do_truncation(9) 🎀

okay so we’re in the Kernel API Manual, bestie, and this page is all about do_truncation(9) — the little function that handles truncating an inode. no cap, it’s giving kernel-internals realness. 💖

✨ NAME ✨

do_truncation — truncate an inode.

✨ SYNOPSIS ✨

int do_truncation (struct ubifs_info *c , struct inode *inode , const
       struct iattr *attr );

✨ ARGUMENTS ✨

• c — UBIFS file-system description object.
• inode — inode to truncate. yes bestie, that exact inode.
• attr — inode attribute changes description.

✨ DESCRIPTION ✨

This function implements the VFS '->setattr' call when the inode is truncated to a smaller size. that’s the whole assignment, and it ate. 💅

✨ RETURN ✨

Returns 0 in case of success and a negative error code in case of failure. slay when it works, negative error code when it doesn’t. 😭

✨ SEE ALSO ✨

Kernel file ./fs/ubifs/file.c — that’s the file to peek at. the reference squad is:

• release_new_page_budget(9)
• release_existing_page_budget(9)
• allocate_budget(9)
• cancel_budget(9)
• populate_page(9)
• ubifs_do_bulk_read(9)
• ubifs_bulk_read(9)
• do_attr_changes(9)
• do_setattr(9)
• mctime_update_needed(9)
• update_mctime(9)

byeee bestie 💖 — this page came from ./fs/ubifs, dated October 2026, and do_truncation(9) is signing off. 🫶✨