[vfs PATCH v3 1/4] VFS: move iomap from exportfs.h to iomap.h

[Bob Peterson <rpeterso@redhat.com>]

This patch moves the iomap declares from its current location in
exportfs.h to a new iomap.h. This will facilitate future improvements
such as a more efficient fiemap for holey files. Hopefully it will
one day be used for multipage writes as well.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
---
 include/linux/exportfs.h | 16 +---------------
 include/linux/iomap.h    | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 15 deletions(-)
 create mode 100644 include/linux/iomap.h

diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index fa05e04..bb564c1 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -2,6 +2,7 @@
 #define LINUX_EXPORTFS_H 1
 
 #include <linux/types.h>
+#include <linux/iomap.h>
 
 struct dentry;
 struct iattr;
@@ -181,21 +182,6 @@ struct fid {
  *    get_name is not (which is possibly inconsistent)
  */
 
-/* types of block ranges for multipage write mappings. */
-#define IOMAP_HOLE	0x01	/* no blocks allocated, need allocation */
-#define IOMAP_DELALLOC	0x02	/* delayed allocation blocks */
-#define IOMAP_MAPPED	0x03	/* blocks allocated @blkno */
-#define IOMAP_UNWRITTEN	0x04	/* blocks allocated @blkno in unwritten state */
-
-#define IOMAP_NULL_BLOCK -1LL	/* blkno is not valid */
-
-struct iomap {
-	sector_t	blkno;	/* first sector of mapping */
-	loff_t		offset;	/* file offset of mapping, bytes */
-	u64		length;	/* length of mapping, bytes */
-	int		type;	/* type of mapping */
-};
-
 struct export_operations {
 	int (*encode_fh)(struct inode *inode, __u32 *fh, int *max_len,
 			struct inode *parent);
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
new file mode 100644
index 0000000..161c1c9
--- /dev/null
+++ b/include/linux/iomap.h
@@ -0,0 +1,20 @@
+#ifndef _IOMAP_H
+#define _IOMAP_H
+
+/* types of block ranges for multipage write mappings. */
+#define IOMAP_HOLE	0x01	/* no blocks allocated, need allocation */
+#define IOMAP_DELALLOC	0x02	/* delayed allocation blocks */
+#define IOMAP_MAPPED	0x03	/* blocks allocated @blkno */
+#define IOMAP_UNWRITTEN	0x04	/* blocks allocated @blkno in unwritten state */
+
+#define IOMAP_NULL_BLOCK -1LL	/* blkno is not valid */
+
+struct iomap {
+	sector_t	blkno;	/* first sector of mapping */
+	loff_t		offset;	/* file offset of mapping, bytes */
+	ssize_t		length;	/* length of mapping, bytes */
+	int		type;	/* type of mapping */
+	void		*priv;	/* fs private data associated with map */
+};
+
+#endif /* _IOMAP_H */
-- 
2.5.0