linux_kernel/fs/reiserfs/xattr_user.c

#include "reiserfs.h"
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include "xattr.h"
#include <linux/uaccess.h>

static int
user_get(const struct xattr_handler *handler, struct dentry *dentry,
	 const char *name, void *buffer, size_t size)
{

	if (strlen(name) < sizeof(XATTR_USER_PREFIX))
		return -EINVAL;
	if (!reiserfs_xattrs_user(dentry->d_sb))
		return -EOPNOTSUPP;
	return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
}

static int
user_set(const struct xattr_handler *handler, struct dentry *dentry,
	 const char *name, const void *buffer, size_t size, int flags)
{
	if (strlen(name) < sizeof(XATTR_USER_PREFIX))
		return -EINVAL;

	if (!reiserfs_xattrs_user(dentry->d_sb))
		return -EOPNOTSUPP;
	return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
}

static bool user_list(struct dentry *dentry)
{
	return reiserfs_xattrs_user(dentry->d_sb);
}

const struct xattr_handler reiserfs_xattr_user_handler = {
	.prefix = XATTR_USER_PREFIX,
	.get = user_get,
	.set = user_set,
	.list = user_list,
};