linux-kernel - [PATCH 0/3] fs/ntfs3: Fixes for big endian systems

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Message-Id: <20211207102454.576906-1-thomas.kuehnel@avm.de>
Date:   Tue, 7 Dec 2021 11:24:52 +0100
From:   Thomas Kühnel <thomas.kuehnel@....de>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Thomas Kühnel <thomas.kuehnel@....de>
Subject: [PATCH 0/3] fs/ntfs3: Fixes for big endian systems

I tried running the NTFS3 driver on a MIPS big endian system and
noticed various errors when it tried to access bitmaps structures
that are stored as little endian on disk.

These patches were mainly tested in a qemu mips environment.

I'm open for suggestions how to better implement the second patch
"add functions to modify LE bitmaps". It adds copies of two functions
from lib/bitmap.c but modified to work with little endian bitmaps.
Other filesystems seem to have similar functions defined locally like
le_bitmap_set in btrfs or ext4_set_bits in ext4 but no global
implementation exists.

Thomas Kühnel (3):
  fs/ntfs3: fix endian conversion in ni_fname_name
  fs/ntfs3: add functions to modify LE bitmaps
  fs/ntfs3: use _le variants of bitops functions

 fs/ntfs3/bitmap.c  | 56 +++++++++++++++++++++++++++++++++++++++-------
 fs/ntfs3/frecord.c |  4 +++-
 fs/ntfs3/fslog.c   |  4 ++--
 fs/ntfs3/fsntfs.c  |  8 +++----
 fs/ntfs3/index.c   | 14 ++++++------
 fs/ntfs3/ntfs_fs.h |  3 +++
 6 files changed, 67 insertions(+), 22 deletions(-)

base-commit: 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1
-- 
2.25.1