linux/fs/affs/bitmap.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/affs/bitmap.c
 *
 *  (c) 1996 Hans-Joachim Widmaier
 *
 *  bitmap.c contains the code that handles all bitmap related stuff -
 *  block allocation, deallocation, calculation of free space.
 */

#include <linux/slab.h>
#include "affs.h"

u32
affs_count_free_blocks(struct super_block *sb)
{ … }

void
affs_free_block(struct super_block *sb, u32 block)
{ … }

/*
 * Allocate a block in the given allocation zone.
 * Since we have to byte-swap the bitmap on little-endian
 * machines, this is rather expensive. Therefore we will
 * preallocate up to 16 blocks from the same word, if
 * possible. We are not doing preallocations in the
 * header zone, though.
 */

u32
affs_alloc_block(struct inode *inode, u32 goal)
{ … }

int affs_init_bitmap(struct super_block *sb, int *flags)
{ … }

void affs_free_bitmap(struct super_block *sb)
{ … }