[JFFS2][XATTR] XATTR support on JFFS2 (version. 5)

[deliverable/linux.git] / fs / jffs2 / xattr_user.c

/*-------------------------------------------------------------------------*
 *  File: fs/jffs2/xattr_user.c
 *  XATTR support on JFFS2 FileSystem
 *
 *  Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
 *  Copyright (C) 2006 NEC Corporation
 *
 *  For licensing information, see the file 'LICENCE' in the jffs2 directory.
 *-------------------------------------------------------------------------*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/jffs2.h>
#include <linux/xattr.h>
#include <linux/mtd/mtd.h>
#include "nodelist.h"

static int jffs2_user_getxattr(struct inode *inode, const char *name,
                               void *buffer, size_t size)
{
	if (!strcmp(name, ""))
		return -EINVAL;
	return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size);
}

static int jffs2_user_setxattr(struct inode *inode, const char *name, const void *buffer,
                               size_t size, int flags)
{
	if (!strcmp(name, ""))
		return -EINVAL;
	return do_jffs2_setxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size, flags);
}

static size_t jffs2_user_listxattr(struct inode *inode, char *list, size_t list_size,
				   const char *name, size_t name_len)
{
	size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;

	if (list && retlen <= list_size) {
		strcpy(list, XATTR_USER_PREFIX);
		strcpy(list + XATTR_USER_PREFIX_LEN, name);
	}

	return retlen;
}

struct xattr_handler jffs2_user_xattr_handler = {
	.prefix = XATTR_USER_PREFIX,
	.list = jffs2_user_listxattr,
	.set = jffs2_user_setxattr,
	.get = jffs2_user_getxattr
};