xfs: consolidate extent swap code

So we don't need xfs_dfrag.h in userspace anymore, move the extent
swap ioctl structure definition to xfs_fs.h where most of the other
ioctl structure definitions are.

Now that we don't need separate files for extent swapping, separate
the basic file descriptor checking code to xfs_ioctl.c, and the code
that does the extent swap operation to xfs_bmap_util.c.  This
cleanly separates the user interface code from the physical
mechanism used to do the extent swap.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 68c2e18f7e07..74b24b2ecd07 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -461,6 +461,21 @@ typedef struct xfs_handle {
                                  + (handle).ha_fid.fid_len)
 
 /*
+ * Structure passed to XFS_IOC_SWAPEXT
+ */
+typedef struct xfs_swapext
+{
+        __int64_t       sx_version;     /* version */
+#define XFS_SX_VERSION          0
+        __int64_t       sx_fdtarget;    /* fd of target file */
+        __int64_t       sx_fdtmp;       /* fd of tmp file */
+        xfs_off_t       sx_offset;      /* offset into file */
+        xfs_off_t       sx_length;      /* leng from offset */
+        char            sx_pad[16];     /* pad space, unused */
+        xfs_bstat_t     sx_stat;        /* stat of target b4 copy */
+} xfs_swapext_t;
+
+/*
  * Flags for going down operation
  */
 #define XFS_FSOP_GOING_FLAGS_DEFAULT            0x0     /* going down */