[Bug]: Support a partial last block group to avoid expanding the EXT4 filesystem size · apple/containerization#647

(2 Kommentare) (0 Reaktionen) (1 zugewiesene Person)Swift (278 Forks)batch import

help wanted

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Beschreibung

I have done the following

I have searched the existing issues
If possible, I've reproduced the issue using the 'main' branch of this project

Steps to reproduce

Create an EXT4 filesystem with 160 MiB:

container volume create -s 160M size-test
stat -f%z ~/Library/Application\ Support/com.apple.container/volumes/size-test/volume.img

Current behavior

When creating an EXT4 filesystem, the requested size is expanded to the nearest block group boundary. A filesystem whose requested size falls between two block group boundaries ends up larger than requested - 256 MiB:

268435456

Expected behavior

The fix is to support a partial last block group so the filesystem uses exactly the requested size - 160 MiB:

167772160

Environment

N/A

Relevant log output

N/A

Code of Conduct

I agree to follow this project's Code of Conduct

Contributor Guide

Research-Richtung: Untersuche den EXT4 Dateisystem Erstellungscode im containerization Projekt, um eine partielle letzte Blockgruppe zu unterstützen. Konzentriere dich darauf, wie Blockgruppengrenzen berechnet werden, und ändere die Zuordnung, um die exakt angeforderte Größe zu verwenden.
Tech Stack: swift
Domain: backend
Issue Type: Fehler
Schwierigkeit: 2
Geschätzte Zeit: 1-3 Stunden
Aktivitätsstatus: Aktiv
Klarheit: Klar
Voraussetzungen: Git
Einsteigerfreundlichkeit: 65