diff options
Diffstat (limited to 'drivers/staging/lustre/include/uapi/linux/lustre/lustre_fiemap.h')
| -rw-r--r-- | drivers/staging/lustre/include/uapi/linux/lustre/lustre_fiemap.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/uapi/linux/lustre/lustre_fiemap.h b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_fiemap.h new file mode 100644 index 000000000000..f5214dc33c60 --- /dev/null +++ b/drivers/staging/lustre/include/uapi/linux/lustre/lustre_fiemap.h @@ -0,0 +1,72 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.gnu.org/licenses/gpl-2.0.html + * + * GPL HEADER END + */ +/* + * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2014, 2015, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * FIEMAP data structures and flags. This header file will be used until + * fiemap.h is available in the upstream kernel. + * + * Author: Kalpak Shah <kalpak.shah@sun.com> + * Author: Andreas Dilger <adilger@sun.com> + */ + +#ifndef _LUSTRE_FIEMAP_H +#define _LUSTRE_FIEMAP_H + +#include <stddef.h> +#include <linux/fiemap.h> + +/* XXX: We use fiemap_extent::fe_reserved[0] */ +#define fe_device fe_reserved[0] + +static inline size_t fiemap_count_to_size(size_t extent_count) +{ + return sizeof(struct fiemap) + extent_count * + sizeof(struct fiemap_extent); +} + +static inline unsigned fiemap_size_to_count(size_t array_size) +{ + return (array_size - sizeof(struct fiemap)) / + sizeof(struct fiemap_extent); +} + +#define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */ + +#ifdef FIEMAP_FLAGS_COMPAT +#undef FIEMAP_FLAGS_COMPAT +#endif + +/* Lustre specific flags - use a high bit, don't conflict with upstream flag */ +#define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */ +#define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely. + * Sets NO_DIRECT flag + */ + +#endif /* _LUSTRE_FIEMAP_H */ |