btrfs: uapi/linux/btrfs.h migration, move struct btrfs_ioctl_defrag_range_args

struct btrfs_ioctl_defrag_range_args is used by the BTRFS_IOC_DEFRAG_RANGE
ioctl.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 37 insertions, 1 deletions

diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index abae362d4ec7..98aff38a70d3 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -474,9 +474,45 @@ struct btrfs_ioctl_clone_range_args {
   __u64 dest_offset;
 };
 
-/* flags for the defrag range ioctl */
+/*
+ * flags definition for the defrag range ioctl
+ *
+ * Used by:
+ * struct btrfs_ioctl_defrag_range_args.flags
+ */
 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
 #define BTRFS_DEFRAG_RANGE_START_IO 2
+struct btrfs_ioctl_defrag_range_args {
+        /* start of the defrag operation */
+        __u64 start;
+
+        /* number of bytes to defrag, use (u64)-1 to say all */
+        __u64 len;
+
+        /*
+         * flags for the operation, which can include turning
+         * on compression for this one defrag
+         */
+        __u64 flags;
+
+        /*
+         * any extent bigger than this will be considered
+         * already defragged.  Use 0 to take the kernel default
+         * Use 1 to say every single extent must be rewritten
+         */
+        __u32 extent_thresh;
+
+        /*
+         * which compression method to use if turning on compression
+         * for this defrag operation.  If unspecified, zlib will
+         * be used
+         */
+        __u32 compress_type;
+
+        /* spare for later */
+        __u32 unused[4];
+};
+
 
 #define BTRFS_SAME_DATA_DIFFERS 1
 /* For extent-same ioctl */