linux/fs/sysv/ialloc.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/sysv/ialloc.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/ialloc.c
 *  Copyright (C) 1993  Bruno Haible
 *
 *  This file contains code for allocating/freeing inodes.
 */

#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/writeback.h>
#include "sysv.h"

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

/* An inode on disk is considered free if both i_mode == 0 and i_nlink == 0. */

/* return &sb->sv_sb_fic_inodes[i] = &sbd->s_inode[i]; */
static inline sysv_ino_t *
sv_sb_fic_inode(struct super_block * sb, unsigned int i)
{ … }

struct sysv_inode *
sysv_raw_inode(struct super_block *sb, unsigned ino, struct buffer_head **bh)
{ … }

static int refill_free_cache(struct super_block *sb)
{ … }

void sysv_free_inode(struct inode * inode)
{ … }

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

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