[coreutils] Patch FIEMAP support for effieicent sparse file copy v1

[jeff.liu]

The fiemap header file is not exposed so far, so I copy it from kernel and add 
to src/ for now.

>From b0422f452d989863d2c339ec2cb2a6fa89015997 Mon Sep 17 00:00:00 2001
From: Jie Liu <address@hidden>
Date: Sat, 20 Mar 2010 20:32:25 +0800
Subject: [PATCH] since the filemap header does not exposed to user now, copy it 
from kernel.

Signed-off-by: Jie Liu <address@hidden>
---
 src/fiemap.h |   59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 59 insertions(+), 0 deletions(-)
 create mode 100644 src/fiemap.h

diff --git a/src/fiemap.h b/src/fiemap.h
new file mode 100644
index 0000000..3d85001
--- /dev/null
+++ b/src/fiemap.h
@@ -0,0 +1,59 @@
+/*
+ * FS_IOC_FIEMAP ioctl infrastructure.
+ *
+ * Some portions copyright (C) 2007 Cluster File Systems, Inc
+ *
+ * Authors: Mark Fasheh <address@hidden>
+ *          Kalpak Shah <address@hidden>
+ *          Andreas Dilger <address@hidden>
+*/
+
+#ifndef _LINUX_FIEMAP_H
+#define _LINUX_FIEMAP_H
+
+#include <linux/types.h>
+
+struct fiemap_extent {
+  uint64_t fe_logical;  /* logical offset in bytes for the start of
+                           the extent from the beginning of the file.  */
+  uint64_t fe_physical; /* physical offset in bytes for the start
+                           of the extent from the beginning of the disk.  */
+  uint64_t fe_length;   /* length in bytes for this extent.  */
+  uint64_t fe_reserved64[2];
+  uint32_t fe_flags;    /* FIEMAP_EXTENT_* flags for this extent.  */
+  uint32_t fe_reserved[3];
+};
+
+struct fiemap {
+  uint64_t fm_start;                  /* logical offset (inclusive) at
+                                         which to start mapping (in).  */
+  uint64_t fm_length;                 /* logical length of mapping which
+                                        userspace wants (in).  */
+  uint32_t fm_flags;                  /* FIEMAP_FLAG_* flags for request 
(in/out).  */
+  uint32_t fm_mapped_extents;         /* number of extents that were mapped 
(out).  */
+  uint32_t fm_extent_count;           /* size of fm_extents array (in).  */
+  uint32_t fm_reserved;
+  struct fiemap_extent fm_extents[0]; /* array of mapped extents (out).  */
+};
+
+#define FIEMAP_MAX_OFFSET      (~0ULL)
+
+#define FIEMAP_FLAG_SYNC       0x00000001 /* sync file data before map.  */
+#define FIEMAP_FLAG_XATTR      0x00000002 /* map extended attribute tree.  */
+
+#define FIEMAP_FLAGS_COMPAT    (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
+
+#define FIEMAP_EXTENT_LAST             0x00000001 /* Last extent in file.  */
+#define FIEMAP_EXTENT_UNKNOWN          0x00000002 /* Data location unknown.  */
+#define FIEMAP_EXTENT_DELALLOC         0x00000004 /* Location still pending, 
Sets EXTENT_UNKNOWN.  */
+#define FIEMAP_EXTENT_ENCODED          0x00000008 /* Data can not be read 
while fs is unmounted.  */
+#define FIEMAP_EXTENT_DATA_ENCRYPTED   0x00000080 /* Data is encrypted by fs. 
Sets EXTENT_NO_BYPASS.  */
+#define FIEMAP_EXTENT_NOT_ALIGNED      0x00000100 /* Extent offsets may not be 
block aligned.  */
+#define FIEMAP_EXTENT_DATA_INLINE      0x00000200 /* Data mixed with metadata. 
Sets EXTENT_NOT_ALIGNED.  */
+#define FIEMAP_EXTENT_DATA_TAIL                0x00000400 /* Multiple files in 
block. Sets EXTENT_NOT_ALIGNED.  */
+#define FIEMAP_EXTENT_UNWRITTEN                0x00000800 /* Space allocated, 
but no data (i.e. zero).  */
+#define FIEMAP_EXTENT_MERGED           0x00001000 /* File does not natively 
support extents. Result
+                                                      merged for efficiency. */
+#define FIEMAP_EXTENT_SHARED           0x00002000 /* Space shared with other 
files.  */
+
+#endif /* _LINUX_FIEMAP_H */
-- 
1.5.4.3