linux/fs/minix/bitmap.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/minix/bitmap.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */

/*
 * Modified for 680x0 by Hamish Macdonald
 * Fixed for 680x0 by Andreas Schwab
 */

/* bitmap.c contains the code that handles the inode and block bitmaps */

#include "minix.h"
#include <linux/buffer_head.h>
#include <linux/bitops.h>
#include <linux/sched.h>

static DEFINE_SPINLOCK(bitmap_lock);

/*
 * bitmap consists of blocks filled with 16bit words
 * bit set == busy, bit clear == free
 * endianness is a mess, but for counting zero bits it really doesn't matter...
 */
static __u32 count_free(struct buffer_head *map[], unsigned blocksize, __u32 numbits)
{ … }

void minix_free_block(struct inode *inode, unsigned long block)
{ … }

int minix_new_block(struct inode * inode)
{ … }

unsigned long minix_count_free_blocks(struct super_block *sb)
{ … }

struct minix_inode *
minix_V1_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh)
{ … }

struct minix2_inode *
minix_V2_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh)
{ … }

/* Clear the link count and mode of a deleted inode on disk. */

static void minix_clear_inode(struct inode *inode)
{ … }

void minix_free_inode(struct inode * inode)
{ … }

struct inode *minix_new_inode(const struct inode *dir, umode_t mode)
{ … }

unsigned long minix_count_free_inodes(struct super_block *sb)
{ … }