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authorTristan Ye <tristan.ye@oracle.com>2011-05-25 13:37:51 +0800
committerTristan Ye <tristan.ye@oracle.com>2011-05-25 15:17:08 +0800
commit220ebc4334326bc23e4c4c3f076dc5a58ec293f6 (patch)
treeb455859f7a1f53ab3bf54fc377ffd4fbc0425880
parent3e19a25e0591a6248f3ddd2c08566666607d827d (diff)
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>
-rw-r--r--fs/ocfs2/ocfs2_ioctl.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
index 18b6770dc468..5b27ff1fa577 100644
--- a/fs/ocfs2/ocfs2_ioctl.h
+++ b/fs/ocfs2/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 */