linux/fs/hpfs/anode.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/hpfs/anode.c
 *
 *  Mikulas Patocka ([email protected]), 1998-1999
 *
 *  handling HPFS anode tree that contains file allocation info
 */

#include "hpfs_fn.h"

/* Find a sector in allocation tree */

secno hpfs_bplus_lookup(struct super_block *s, struct inode *inode,
		   struct bplus_header *btree, unsigned sec,
		   struct buffer_head *bh)
{ … }

/* Add a sector to tree */

secno hpfs_add_sector_to_btree(struct super_block *s, secno node, int fnod, unsigned fsecno)
{ … }

/*
 * Remove allocation tree. Recursion would look much nicer but
 * I want to avoid it because it can cause stack overflow.
 */

void hpfs_remove_btree(struct super_block *s, struct bplus_header *btree)
{ … }

/* Just a wrapper around hpfs_bplus_lookup .. used for reading eas */

static secno anode_lookup(struct super_block *s, anode_secno a, unsigned sec)
{ … }

int hpfs_ea_read(struct super_block *s, secno a, int ano, unsigned pos,
	    unsigned len, char *buf)
{ … }

int hpfs_ea_write(struct super_block *s, secno a, int ano, unsigned pos,
	     unsigned len, const char *buf)
{ … }

void hpfs_ea_remove(struct super_block *s, secno a, int ano, unsigned len)
{ … }

/* Truncate allocation tree. Doesn't join anodes - I hope it doesn't matter */

void hpfs_truncate_btree(struct super_block *s, secno f, int fno, unsigned secs)
{ … }

/* Remove file or directory and it's eas - note that directory must
   be empty when this is called. */

void hpfs_remove_fnode(struct super_block *s, fnode_secno fno)
{ … }