linux/fs/sysv/balloc.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/sysv/balloc.c
 *
 *  minix/bitmap.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext/freelists.c
 *  Copyright (C) 1992  Remy Card ([email protected])
 *
 *  xenix/alloc.c
 *  Copyright (C) 1992  Doug Evans
 *
 *  coh/alloc.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/balloc.c
 *  Copyright (C) 1993  Bruno Haible
 *
 *  This file contains code for allocating/freeing blocks.
 */

#include <linux/buffer_head.h>
#include <linux/string.h>
#include "sysv.h"

/* We don't trust the value of
   sb->sv_sbd2->s_tfree = *sb->sv_free_blocks
   but we nevertheless keep it up to date. */

static inline sysv_zone_t *get_chunk(struct super_block *sb, struct buffer_head *bh)
{ … }

/* NOTE NOTE NOTE: nr is a block number _as_ _stored_ _on_ _disk_ */

void sysv_free_block(struct super_block * sb, sysv_zone_t nr)
{ … }

sysv_zone_t sysv_new_block(struct super_block * sb)
{ … }

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