[Ocfs2-tools-devel] [PATCH 1/1] ocfs2-tools: add definition of ocfs2_move_extents in ocfs2_ioctl.h

[Tristan Ye]

Cool, Tiger.

SOB

BTW, I guess a defrag utility calling ioctl(MOVE_EXT) will be posted later?

On Tue, Aug 30, 2011 at 11:13 AM, Tiger Yang <tiger.yang at oracle.com> wrote:

> This patch update the definition of ocfs2_move_extents from
> kernel head file.
>
> Signed-off-by: Tiger Yang <tiger.yang at oracle.com>
> ---
>  include/ocfs2-kernel/ocfs2_ioctl.h |   34
> ++++++++++++++++++++++++++++++++++
>  1 files changed, 34 insertions(+), 0 deletions(-)
>
> diff --git a/include/ocfs2-kernel/ocfs2_ioctl.h
> b/include/ocfs2-kernel/ocfs2_ioctl.h
> index 05ea113..0ba4f2e 100644
> --- a/include/ocfs2-kernel/ocfs2_ioctl.h
> +++ b/include/ocfs2-kernel/ocfs2_ioctl.h
> @@ -205,4 +205,38 @@ enum ocfs2_info_type {
>
>  #define OCFS2_IOC_INFO         _IOR('o', 5, struct ocfs2_info)
>
> +struct ocfs2_move_extents {
> +/* All values are in bytes */
> +       /* in */
> +       __u64 me_start;         /* Virtual start in the file to move */
> +       __u64 me_len;           /* Length of the extents to be moved */
> +       __u64 me_goal;          /* Physical offset of the goal,
> +                                  it's in block unit */
> +       __u64 me_threshold;     /* Maximum distance from goal or threshold
> +                                  for auto defragmentation */
> +       __u64 me_flags;         /* Flags for the operation:
> +                                * - auto defragmentation.
> +                                * - refcount,xattr cases.
> +                                */
> +       /* out */
> +       __u64 me_moved_len;     /* Moved/defraged length */
> +       __u64 me_new_offset;    /* Resulting physical location */
> +       __u32 me_reserved[2];   /* Reserved for futhure */
> +};
> +
> +#define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG  (0x00000001)    /* Kernel manages
> to
> +                                                          claim new
> clusters
> +                                                          as the goal
> place
> +                                                          for extents
> moving */
> +#define OCFS2_MOVE_EXT_FL_PART_DEFRAG  (0x00000002)    /* Allow partial
> extent
> +                                                          moving, is to
> make
> +                                                          movement less
> likely
> +                                                          to fail, may
> make fs
> +                                                          even more
> fragmented */
> +#define OCFS2_MOVE_EXT_FL_COMPLETE     (0x00000004)    /* Move or
> defragmenation
> +                                                          completely gets
> done.
> +                                                        */
> +
> +#define OCFS2_IOC_MOVE_EXT     _IOW('o', 6, struct ocfs2_move_extents)
> +
>  #endif /* OCFS2_IOCTL_H */
> --
> 1.7.4.4
>
>
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