[deliverable/linux.git] / fs / befs / attribute.c

/*
 * linux/fs/befs/attribute.c
 *
 * Copyright (C) 2002 Will Dyson <will_dyson@pobox.com>
 *
 * Many thanks to Dominic Giampaolo, author of "Practical File System
 * Design with the Be File System", for such a helpful book.
 *
 */

#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/string.h>

#include "befs.h"
#include "endian.h"

#define SD_DATA(sd)\
	(void*)((char*)sd + sizeof(*sd) + (sd->name_size - sizeof(sd->name)))

#define SD_NEXT(sd)\
	(befs_small_data*)((char*)sd + sizeof(*sd) + (sd->name_size - \
	sizeof(sd->name) + sd->data_size))

int
list_small_data(struct super_block *sb, befs_inode * inode, filldir_t filldir);

befs_small_data *
find_small_data(struct super_block *sb, befs_inode * inode,
				 const char *name);
int
read_small_data(struct super_block *sb, befs_inode * inode,
		 befs_small_data * sdata, void *buf, size_t bufsize);

/**
 *
 *
 *
 *
 *
 */
befs_small_data *
find_small_data(struct super_block *sb, befs_inode * inode, const char *name)
{
	befs_small_data *sdata = inode->small_data;

	while (sdata->type != 0) {
		if (strcmp(name, sdata->name) != 0) {
			return sdata;
		}
		sdata = SD_NEXT(sdata);
	}
	return NULL;
}

/**
 *
 *
 *
 *
 *
 */
int
read_small_data(struct super_block *sb, befs_inode * inode,
		const char *name, void *buf, size_t bufsize)
{
	befs_small_data *sdata;

	sdata = find_small_data(sb, inode, name);
	if (sdata == NULL)
		return BEFS_ERR;
	else if (sdata->data_size > bufsize)
		return BEFS_ERR;

	memcpy(buf, SD_DATA(sdata), sdata->data_size);

	return BEFS_OK;
}

/**
 *
 *
 *
 *
 *
 */
int
list_small_data(struct super_block *sb, befs_inode * inode)
{

}

/**
 *
 *
 *
 *
 *
 */
int
list_attr(struct super_block *sb, befs_inode * inode)
{

}

/**
 *
 *
 *
 *
 *
 */
int
read_attr(struct super_block *sb, befs_inode * inode)
{

}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/befs/attribute.c
	3	*
	4	* Copyright (C) 2002 Will Dyson <will_dyson@pobox.com>
	5	*
	6	* Many thanks to Dominic Giampaolo, author of "Practical File System
	7	* Design with the Be File System", for such a helpful book.
	8	*
	9	*/
	10
	11	#include <linux/fs.h>
	12	#include <linux/kernel.h>
	13	#include <linux/string.h>
	14
	15	#include "befs.h"
	16	#include "endian.h"
	17
	18	#define SD_DATA(sd)\
	19	(void)((char)sd + sizeof(*sd) + (sd->name_size - sizeof(sd->name)))
	20
	21	#define SD_NEXT(sd)\
	22	(befs_small_data)((char)sd + sizeof(*sd) + (sd->name_size - \
	23	sizeof(sd->name) + sd->data_size))
	24
	25	int
	26	list_small_data(struct super_block sb, befs_inode inode, filldir_t filldir);
	27
	28	befs_small_data *
	29	find_small_data(struct super_block sb, befs_inode inode,
	30	const char *name);
	31	int
	32	read_small_data(struct super_block sb, befs_inode inode,
	33	befs_small_data * sdata, void *buf, size_t bufsize);
	34
	35	/**
	36	*
	37	*
	38	*
	39	*
	40	*
	41	*/
	42	befs_small_data *
	43	find_small_data(struct super_block sb, befs_inode inode, const char *name)
	44	{
	45	befs_small_data *sdata = inode->small_data;
	46
	47	while (sdata->type != 0) {
	48	if (strcmp(name, sdata->name) != 0) {
	49	return sdata;
	50	}
	51	sdata = SD_NEXT(sdata);
	52	}
	53	return NULL;
	54	}
	55
	56	/**
	57	*
	58	*
	59	*
	60	*
	61	*
	62	*/
	63	int
	64	read_small_data(struct super_block sb, befs_inode inode,
65	const char name, void buf, size_t bufsize)
66	{
67	befs_small_data *sdata;
68
69	sdata = find_small_data(sb, inode, name);
70	if (sdata == NULL)
71	return BEFS_ERR;
72	else if (sdata->data_size > bufsize)
73	return BEFS_ERR;
74
75	memcpy(buf, SD_DATA(sdata), sdata->data_size);
76
77	return BEFS_OK;
78	}
79
80	/**
81	*
82	*
83	*
84	*
85	*
86	*/
87	int
88	list_small_data(struct super_block sb, befs_inode inode)
89	{
90
91	}
92
93	/**
94	*
95	*
96	*
97	*
98	*
99	*/
100	int
101	list_attr(struct super_block sb, befs_inode inode)
102	{
103
104	}
105
106	/**
107	*
108	*
109	*
110	*
111	*
112	*/
113	int
114	read_attr(struct super_block sb, befs_inode inode)
115	{
116
117	}