Re: [PATCH] ntfs: mount read-only when mft records are smaller than the device block

[Hyunchul Lee]

Hi Dennis,

2026년 8월 24일 (월) 오전 2:45, Dennis Tighe <dennis.tighe@xxxxxxxxx>님이 작성:

> +       if (vol->mft_record_size < bdev_logical_block_size(sb->s_bdev)) {
> +               if (!sb_rdonly(sb)) {
> +                       ntfs_error(sb,
> +                                  "mft record size (%i) is smaller than the device logical block size (%u).  Mft records cannot be written.  Mounting read-only.",
> +                                  vol->mft_record_size,
> +                                  bdev_logical_block_size(sb->s_bdev));
> +                       sb->s_flags |= SB_RDONLY;
> +               }
> +       }

This check is performed only during the initial mount.
A file system can be remounted read-write through
ntfs_reconfigure().

Please add this check to ntfs_reconfigure().


> +
>         /* Initialize the cluster and mft allocators. */
>         ntfs_setup_allocators(vol);
>         /* Setup remaining fields in the super block. */
> --
> 2.43.0
>


--
Thanks,
Hyunchul