[Ocfs2-tools-devel] [PATCH 03/19] Ocfs2-tools: Add fiemap kernel header for o2info.

[Sunil Mushran]

This is not needed. We are looking to use standard tools for this.


Tristan Ye wrote:
> We've got fiemap ioctl support in new kernel, some old
> distros however don't have the fiemap header, we therefore
> include here to work around the problem without hurting
> any part of ocfs2-tools codes.
>
> We may later uniformly use an installed header, but until then,
> It's worth adding this kernel header into ocfs2-tools.
>
> Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
> ---
>  include/ocfs2-kernel/fiemap.h |   72 +++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 72 insertions(+), 0 deletions(-)
>  create mode 100644 include/ocfs2-kernel/fiemap.h
>
> diff --git a/include/ocfs2-kernel/fiemap.h b/include/ocfs2-kernel/fiemap.h
> new file mode 100644
> index 0000000..4563e2d
> --- /dev/null
> +++ b/include/ocfs2-kernel/fiemap.h
> @@ -0,0 +1,72 @@
> +/*
> + * FS_IOC_FIEMAP ioctl infrastructure.
> + *
> + * Some portions copyright (C) 2007 Cluster File Systems, Inc
> + *
> + * Authors: Mark Fasheh <mfasheh at suse.com>
> + *          Kalpak Shah <kalpak.shah at sun.com>
> + *          Andreas Dilger <adilger at sun.com>
> + */
> +
> +#ifndef _LINUX_FIEMAP_H
> +#define _LINUX_FIEMAP_H
> +
> +#include <linux/types.h>
> +
> +struct fiemap_extent {
> +	__u64 fe_logical;  /* logical offset in bytes for the start of
> +			    * the extent from the beginning of the file */
> +	__u64 fe_physical; /* physical offset in bytes for the start
> +			    * of the extent from the beginning of the disk */
> +	__u64 fe_length;   /* length in bytes for this extent */
> +	__u64 fe_reserved64[2];
> +	__u32 fe_flags;    /* FIEMAP_EXTENT_* flags for this extent */
> +	__u32 fe_reserved[3];
> +};
> +
> +struct fiemap {
> +	__u64 fm_start;		/* logical offset (inclusive) at
> +				 * which to start mapping (in) */
> +	__u64 fm_length;	/* logical length of mapping which
> +				 * userspace wants (in) */
> +	__u32 fm_flags;		/* FIEMAP_FLAG_* flags for request (in/out) */
> +	__u32 fm_mapped_extents;/* number of extents that were mapped (out) */
> +	__u32 fm_extent_count;  /* size of fm_extents array (in) */
> +	__u32 fm_reserved;
> +	struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
> +};
> +
> +#ifndef FS_IOC_FIEMAP
> +#define FS_IOC_FIEMAP	_IOWR('f', 11, struct fiemap)
> +#endif
> +
> +#define FIEMAP_MAX_OFFSET	(~0ULL)
> +
> +#define FIEMAP_FLAG_SYNC	0x00000001 /* sync file data before map */
> +#define FIEMAP_FLAG_XATTR	0x00000002 /* map extended attribute tree */
> +
> +#define FIEMAP_FLAGS_COMPAT	(FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
> +
> +#define FIEMAP_EXTENT_LAST		0x00000001 /* Last extent in file. */
> +#define FIEMAP_EXTENT_UNKNOWN		0x00000002 /* Data location unknown. */
> +#define FIEMAP_EXTENT_DELALLOC		0x00000004 /* Location still pending.
> +						    * Sets EXTENT_UNKNOWN. */
> +#define FIEMAP_EXTENT_ENCODED		0x00000008 /* Data can not be read
> +						    * while fs is unmounted */
> +#define FIEMAP_EXTENT_DATA_ENCRYPTED	0x00000080 /* Data is encrypted by fs.
> +						    * Sets EXTENT_NO_BYPASS. */
> +#define FIEMAP_EXTENT_NOT_ALIGNED	0x00000100 /* Extent offsets may not be
> +						    * block aligned. */
> +#define FIEMAP_EXTENT_DATA_INLINE	0x00000200 /* Data mixed with metadata.
> +						    * Sets EXTENT_NOT_ALIGNED.*/
> +#define FIEMAP_EXTENT_DATA_TAIL		0x00000400 /* Multiple files in block.
> +						    * Sets EXTENT_NOT_ALIGNED.*/
> +#define FIEMAP_EXTENT_UNWRITTEN		0x00000800 /* Space allocated, but
> +						    * no data (i.e. zero). */
> +#define FIEMAP_EXTENT_MERGED		0x00001000 /* File does not natively
> +						    * support extents. Result
> +						    * merged for efficiency. */
> +#define FIEMAP_EXTENT_SHARED		0x00002000 /* Space shared with other
> +						    * files. */
> +
> +#endif /* _LINUX_FIEMAP_H */
>