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Ocfs2/move_extents: Adding new ioctl code 'OCFS2_IOC_MOVE_EXT' to ocfs2. 

Patch also manages to add a manipulative struture for this ioctl.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
This commit is contained in:
Tristan Ye 2011-05-25 13:37:51 +08:00
parent 3e19a25e05
commit 220ebc4334
1 changed files with 34 additions and 0 deletions
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34
fs/ocfs2/ocfs2_ioctl.h
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@ -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 */