示例#1
0
文件: xfs_attr.c 项目: Lyude/linux
/* Retrieve an extended attribute and its value.  Must have ilock. */
int
xfs_attr_get_ilocked(
	struct xfs_inode	*ip,
	struct xfs_da_args	*args)
{
	ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));

	if (!xfs_inode_hasattr(ip))
		return -ENOATTR;
	else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL)
		return xfs_attr_shortform_getvalue(args);
	else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK))
		return xfs_attr_leaf_get(args);
	else
		return xfs_attr_node_get(args);
}
示例#2
0
文件: xfs_attr.c 项目: AK101111/linux
int
xfs_attr_get(
	struct xfs_inode	*ip,
	const unsigned char	*name,
	unsigned char		*value,
	int			*valuelenp,
	int			flags)
{
	struct xfs_da_args	args;
	uint			lock_mode;
	int			error;

	XFS_STATS_INC(ip->i_mount, xs_attr_get);

	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
		return -EIO;

	if (!xfs_inode_hasattr(ip))
		return -ENOATTR;

	error = xfs_attr_args_init(&args, ip, name, flags);
	if (error)
		return error;

	args.value = value;
	args.valuelen = *valuelenp;
	/* Entirely possible to look up a name which doesn't exist */
	args.op_flags = XFS_DA_OP_OKNOENT;

	lock_mode = xfs_ilock_attr_map_shared(ip);
	if (!xfs_inode_hasattr(ip))
		error = -ENOATTR;
	else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL)
		error = xfs_attr_shortform_getvalue(&args);
	else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK))
		error = xfs_attr_leaf_get(&args);
	else
		error = xfs_attr_node_get(&args);
	xfs_iunlock(ip, lock_mode);

	*valuelenp = args.valuelen;
	return error == -EEXIST ? 0 : error;
}