On Mon, Oct 09, 2023 at 05:10:18PM +0200, Alexander Lobakin wrote:
> bitmap_size() is a pretty generic name and one may want to use it for
> a generic bitmap API function. At the same time, its logic is
> NTFS-specific, as it aligns to the sizeof(u64), not the sizeof(long)
> (although it uses ideologically right ALIGN() instead of division).
> Add the prefix 'ntfs3_' used for that FS (not just 'ntfs_' to not mix
> it with the legacy module).
>
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
> ---
> fs/ntfs3/bitmap.c | 4 ++--
> fs/ntfs3/fsntfs.c | 2 +-
> fs/ntfs3/index.c | 11 ++++++-----
> fs/ntfs3/ntfs_fs.h | 2 +-
> fs/ntfs3/super.c | 2 +-
> 5 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c
> index 107e808e06ea..a2e18f13e93a 100644
> --- a/fs/ntfs3/bitmap.c
> +++ b/fs/ntfs3/bitmap.c
> @@ -653,7 +653,7 @@ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits)
> wnd->total_zeroes = nbits;
> wnd->extent_max = MINUS_ONE_T;
> wnd->zone_bit = wnd->zone_end = 0;
> - wnd->nwnd = bytes_to_block(sb, bitmap_size(nbits));
> + wnd->nwnd = bytes_to_block(sb, ntfs3_bitmap_size(nbits));
> wnd->bits_last = nbits & (wbits - 1);
> if (!wnd->bits_last)
> wnd->bits_last = wbits;
> @@ -1345,7 +1345,7 @@ int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits)
> return -EINVAL;
>
> /* Align to 8 byte boundary. */
> - new_wnd = bytes_to_block(sb, bitmap_size(new_bits));
> + new_wnd = bytes_to_block(sb, ntfs3_bitmap_size(new_bits));
> new_last = new_bits & (wbits - 1);
> if (!new_last)
> new_last = wbits;
> diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
> index 33afee0f5559..7a14d2347f27 100644
> --- a/fs/ntfs3/fsntfs.c
> +++ b/fs/ntfs3/fsntfs.c
> @@ -522,7 +522,7 @@ static int ntfs_extend_mft(struct ntfs_sb_info *sbi)
> ni->mi.dirty = true;
>
> /* Step 2: Resize $MFT::BITMAP. */
> - new_bitmap_bytes = bitmap_size(new_mft_total);
> + new_bitmap_bytes = ntfs3_bitmap_size(new_mft_total);
>
> err = attr_set_size(ni, ATTR_BITMAP, NULL, 0, &sbi->mft.bitmap.run,
> new_bitmap_bytes, &new_bitmap_bytes, true, NULL);
> diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
> index 124c6e822623..ab53a4b6ddf8 100644
> --- a/fs/ntfs3/index.c
> +++ b/fs/ntfs3/index.c
> @@ -1453,8 +1453,8 @@ static int indx_create_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
>
> alloc->nres.valid_size = alloc->nres.data_size = cpu_to_le64(data_size);
>
> - err = ni_insert_resident(ni, bitmap_size(1), ATTR_BITMAP, in->name,
> - in->name_len, &bitmap, NULL, NULL);
> + err = ni_insert_resident(ni, ntfs3_bitmap_size(1), ATTR_BITMAP,
> + in->name, in->name_len, &bitmap, NULL, NULL);
> if (err)
> goto out2;
>
> @@ -1515,8 +1515,9 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
> if (bmp) {
> /* Increase bitmap. */
> err = attr_set_size(ni, ATTR_BITMAP, in->name, in->name_len,
> - &indx->bitmap_run, bitmap_size(bit + 1),
> - NULL, true, NULL);
> + &indx->bitmap_run,
> + ntfs3_bitmap_size(bit + 1), NULL, true,
> + NULL);
> if (err)
> goto out1;
> }
> @@ -2089,7 +2090,7 @@ static int indx_shrink(struct ntfs_index *indx, struct ntfs_inode *ni,
> if (in->name == I30_NAME)
> ni->vfs_inode.i_size = new_data;
>
> - bpb = bitmap_size(bit);
> + bpb = ntfs3_bitmap_size(bit);
> if (bpb * 8 == nbits)
> return 0;
>
> diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
> index 629403ede6e5..93333156aac6 100644
> --- a/fs/ntfs3/ntfs_fs.h
> +++ b/fs/ntfs3/ntfs_fs.h
> @@ -961,7 +961,7 @@ static inline bool run_is_empty(struct runs_tree *run)
> }
>
> /* NTFS uses quad aligned bitmaps. */
> -static inline size_t bitmap_size(size_t bits)
> +static inline size_t ntfs3_bitmap_size(size_t bits)
> {
> return ALIGN((bits + 7) >> 3, 8);
> }
This looks like duplicating BITS_TO_U64(). If so, why not just switch
to using the macro while you're here?
> diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
> index cfec5e0c7f66..b1fb6efe7084 100644
> --- a/fs/ntfs3/super.c
> +++ b/fs/ntfs3/super.c
> @@ -1285,7 +1285,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
>
> /* Check bitmap boundary. */
> tt = sbi->used.bitmap.nbits;
> - if (inode->i_size < bitmap_size(tt)) {
> + if (inode->i_size < ntfs3_bitmap_size(tt)) {
> ntfs_err(sb, "$Bitmap is corrupted.");
> err = -EINVAL;
> goto put_inode_out;
> --
> 2.41.0
