summaryrefslogtreecommitdiff
path: root/misc/e4defrag.c
blob: e3011d7cd52c3c510273024462b80a2306ec2bf4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
/*
 * e4defrag.c - ext4 filesystem defragmenter
 *
 * Copyright (C) 2009 NEC Software Tohoku, Ltd.
 *
 * Author: Akira Fujita	<a-fujita@rs.jp.nec.com>
 *         Takashi Sato	<t-sato@yk.jp.nec.com>
 */

#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
#endif

#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
#endif

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include "config.h"
#include <ctype.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <ftw.h>
#include <limits.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ext2fs/ext2_types.h>
#include <ext2fs/ext2fs.h>
#include <sys/ioctl.h>
#include <ext2fs/fiemap.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/vfs.h>

#include "../version.h"

/* A relatively new ioctl interface ... */
#ifndef EXT4_IOC_MOVE_EXT
#define EXT4_IOC_MOVE_EXT      _IOWR('f', 15, struct move_extent)
#endif

/* Macro functions */
#define PRINT_ERR_MSG(msg)	fprintf(stderr, "%s\n", (msg))
#define IN_FTW_PRINT_ERR_MSG(msg)	\
	fprintf(stderr, "\t%s\t\t[ NG ]\n", (msg))
#define PRINT_FILE_NAME(file)	fprintf(stderr, " \"%s\"\n", (file))
#define PRINT_ERR_MSG_WITH_ERRNO(msg)	\
	fprintf(stderr, "\t%s:%s\t[ NG ]\n", (msg), strerror(errno))
#define STATISTIC_ERR_MSG(msg)	\
	fprintf(stderr, "\t%s\n", (msg))
#define STATISTIC_ERR_MSG_WITH_ERRNO(msg)	\
	fprintf(stderr, "\t%s:%s\n", (msg), strerror(errno))
#define min(x, y) (((x) > (y)) ? (y) : (x))
#define CALC_SCORE(ratio) \
	((ratio) > 10 ? (80 + 20 * (ratio) / 100) : (8 * (ratio)))
/* Wrap up the free function */
#define FREE(tmp)				\
	do {					\
		if ((tmp) != NULL)		\
			free(tmp);		\
	} while (0)				\
/* Insert list2 after list1 */
#define insert(list1, list2)			\
	do {					\
		list2->next = list1->next;	\
		list1->next->prev = list2;	\
		list2->prev = list1;		\
		list1->next = list2;		\
	} while (0)

/* To delete unused warning */
#ifdef __GNUC__
#define EXT2FS_ATTR(x) __attribute__(x)
#else
#define EXT2FS_ATTR(x)
#endif

/* The mode of defrag */
#define DETAIL			0x01
#define STATISTIC		0x02

#define DEVNAME			0
#define DIRNAME			1
#define FILENAME		2

#define FTW_OPEN_FD		2000

#define FS_EXT4			"ext4"
#define ROOT_UID		0

#define BOUND_SCORE		55
#define SHOW_FRAG_FILES	5

/* Magic number for ext4 */
#define EXT4_SUPER_MAGIC	0xEF53

/* Definition of flex_bg */
#define EXT4_FEATURE_INCOMPAT_FLEX_BG		0x0200

/* The following macro is used for ioctl FS_IOC_FIEMAP
 * EXTENT_MAX_COUNT:	the maximum number of extents for exchanging between
 *			kernel-space and user-space per ioctl
 */
#define EXTENT_MAX_COUNT	512

/* The following macros are error message */
#define MSG_USAGE		\
"Usage	: e4defrag [-v] file...| directory...| device...\n\
	: e4defrag  -c  file...| directory...| device...\n"

#define NGMSG_EXT4		"Filesystem is not ext4 filesystem"
#define NGMSG_FILE_EXTENT	"Failed to get file extents"
#define NGMSG_FILE_INFO		"Failed to get file information"
#define NGMSG_FILE_OPEN		"Failed to open"
#define NGMSG_FILE_UNREG	"File is not regular file"
#define NGMSG_LOST_FOUND	"Can not process \"lost+found\""

/* Data type for filesystem-wide blocks number */
typedef unsigned long long ext4_fsblk_t;

struct fiemap_extent_data {
	__u64 len;			/* blocks count */
	__u64 logical;		/* start logical block number */
	ext4_fsblk_t physical;		/* start physical block number */
};

struct fiemap_extent_list {
	struct fiemap_extent_list *prev;
	struct fiemap_extent_list *next;
	struct fiemap_extent_data data;	/* extent belong to file */
};

struct fiemap_extent_group {
	struct fiemap_extent_group *prev;
	struct fiemap_extent_group *next;
	__u64 len;	/* length of this continuous region */
	struct fiemap_extent_list *start;	/* start ext */
	struct fiemap_extent_list *end;		/* end ext */
};

struct move_extent {
	__s32 reserved;	/* original file descriptor */
	__u32 donor_fd;	/* donor file descriptor */
	__u64 orig_start;	/* logical start offset in block for orig */
	__u64 donor_start;	/* logical start offset in block for donor */
	__u64 len;	/* block length to be moved */
	__u64 moved_len;	/* moved block length */
};

struct frag_statistic_ino {
	int now_count;	/* the file's extents count of before defrag */
	int best_count; /* the best file's extents count */
	__u64 size_per_ext;	/* size(KB) per extent */
	float ratio;	/* the ratio of fragmentation */
	char msg_buffer[PATH_MAX + 1];	/* pathname of the file */
};

static char	lost_found_dir[PATH_MAX + 1];
static int	block_size;
static int	extents_before_defrag;
static int	extents_after_defrag;
static int	mode_flag;
static unsigned int	current_uid;
static unsigned int	defraged_file_count;
static unsigned int	frag_files_before_defrag;
static unsigned int	frag_files_after_defrag;
static unsigned int	regular_count;
static unsigned int	succeed_cnt;
static unsigned int	total_count;
static __u8 log_groups_per_flex;
static __u32 blocks_per_group;
static __u32 feature_incompat;
static ext4_fsblk_t	files_block_count;
static struct frag_statistic_ino	frag_rank[SHOW_FRAG_FILES];


/*
 * We prefer posix_fadvise64 when available, as it allows 64bit offset on
 * 32bit systems
 */
#if defined(HAVE_POSIX_FADVISE64)
#define posix_fadvise	posix_fadvise64
#elif defined(HAVE_FADVISE64)
#define posix_fadvise	fadvise64
#elif !defined(HAVE_POSIX_FADVISE)
#error posix_fadvise not available!
#endif

/*
 * get_mount_point() -	Get device's mount point.
 *
 * @devname:		the device's name.
 * @mount_point:	the mount point.
 * @dir_path_len:	the length of directory.
 */
static int get_mount_point(const char *devname, char *mount_point,
							int dir_path_len)
{
	/* Refer to /etc/mtab */
	const char	*mtab = MOUNTED;
	FILE		*fp = NULL;
	struct mntent	*mnt = NULL;
	struct stat64	sb;

	if (stat64(devname, &sb) < 0) {
		perror(NGMSG_FILE_INFO);
		PRINT_FILE_NAME(devname);
		return -1;
	}

	fp = setmntent(mtab, "r");
	if (fp == NULL) {
		perror("Couldn't access /etc/mtab");
		return -1;
	}

	while ((mnt = getmntent(fp)) != NULL) {
		struct stat64 ms;

		/*
		 * To handle device symlinks, we see if the
		 * device number matches, not the name
		 */
		if (stat64(mnt->mnt_fsname, &ms) < 0)
			continue;
		if (sb.st_rdev != ms.st_rdev)
			continue;

		endmntent(fp);
		if (strcmp(mnt->mnt_type, FS_EXT4) == 0) {
			strncpy(mount_point, mnt->mnt_dir,
				dir_path_len);
			return 0;
		}
		PRINT_ERR_MSG(NGMSG_EXT4);
		return -1;
	}
	endmntent(fp);
	PRINT_ERR_MSG("Filesystem is not mounted");
	return -1;
}

/*
 * is_ext4() -		Whether on an ext4 filesystem.
 *
 * @file:		the file's name.
 */
static int is_ext4(const char *file, char devname[PATH_MAX + 1])
{
	int 	maxlen = 0;
	int	len, ret;
	int	type_is_ext4 = 0;
	FILE	*fp = NULL;
	/* Refer to /etc/mtab */
	const char	*mtab = MOUNTED;
	char	file_path[PATH_MAX + 1];
	struct mntent	*mnt = NULL;
	struct statfs64	fsbuf;

	/* Get full path */
	if (realpath(file, file_path) == NULL) {
		perror("Couldn't get full path");
		PRINT_FILE_NAME(file);
		return -1;
	}

	if (statfs64(file_path, &fsbuf) < 0) {
		perror("Failed to get filesystem information");
		PRINT_FILE_NAME(file);
		return -1;
	}

	if (fsbuf.f_type != EXT4_SUPER_MAGIC) {
		PRINT_ERR_MSG(NGMSG_EXT4);
		return -1;
	}

	fp = setmntent(mtab, "r");
	if (fp == NULL) {
		perror("Couldn't access /etc/mtab");
		return -1;
	}

	while ((mnt = getmntent(fp)) != NULL) {
		if (mnt->mnt_fsname[0] != '/')
			continue;
		len = strlen(mnt->mnt_dir);
		ret = memcmp(file_path, mnt->mnt_dir, len);
		if (ret != 0)
			continue;

		if (maxlen >= len)
			continue;

		maxlen = len;

		type_is_ext4 = !strcmp(mnt->mnt_type, FS_EXT4);
		strncpy(lost_found_dir, mnt->mnt_dir, PATH_MAX);
		strncpy(devname, mnt->mnt_fsname, PATH_MAX);
	}

	endmntent(fp);
	if (type_is_ext4)
		return 0;
	PRINT_ERR_MSG(NGMSG_EXT4);
	return -1;
}

/*
 * calc_entry_counts() -	Calculate file counts.
 *
 * @file:		file name.
 * @buf:		file info.
 * @flag:		file type.
 * @ftwbuf:		the pointer of a struct FTW.
 */
static int calc_entry_counts(const char *file EXT2FS_ATTR((unused)),
		const struct stat64 *buf, int flag EXT2FS_ATTR((unused)),
		struct FTW *ftwbuf EXT2FS_ATTR((unused)))
{
	if (S_ISREG(buf->st_mode))
		regular_count++;

	total_count++;

	return 0;
}

/*
 * page_in_core() -	Get information on whether pages are in core.
 *
 * @fd:			defrag target file's descriptor.
 * @defrag_data:	data used for defrag.
 * @vec:		page state array.
 * @page_num:		page number.
 */
static int page_in_core(int fd, struct move_extent defrag_data,
			unsigned char **vec, unsigned int *page_num)
{
	long	pagesize;
	void	*page = NULL;
	ext2_loff_t offset, end_offset, length;

	if (vec == NULL || *vec != NULL)
		return -1;

	pagesize = sysconf(_SC_PAGESIZE);
	if (pagesize < 0)
		return -1;
	/* In mmap, offset should be a multiple of the page size */
	offset = (ext2_loff_t)defrag_data.orig_start * block_size;
	length = (ext2_loff_t)defrag_data.len * block_size;
	end_offset = offset + length;
	/* Round the offset down to the nearest multiple of pagesize */
	offset = (offset / pagesize) * pagesize;
	length = end_offset - offset;

	page = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, offset);
	if (page == MAP_FAILED)
		return -1;

	*page_num = 0;
	*page_num = (length + pagesize - 1) / pagesize;
	*vec = (unsigned char *)calloc(*page_num, 1);
	if (*vec == NULL) {
		munmap(page, length);
		return -1;
	}

	/* Get information on whether pages are in core */
	if (mincore(page, (size_t)length, *vec) == -1 ||
		munmap(page, length) == -1) {
		FREE(*vec);
		return -1;
	}

	return 0;
}

/*
 * defrag_fadvise() -	Predeclare an access pattern for file data.
 *
 * @fd:			defrag target file's descriptor.
 * @defrag_data:	data used for defrag.
 * @vec:		page state array.
 * @page_num:		page number.
 */
static int defrag_fadvise(int fd, struct move_extent defrag_data,
		   unsigned char *vec, unsigned int page_num)
{
	int	flag = 1;
	long	pagesize = sysconf(_SC_PAGESIZE);
	int	fadvise_flag = POSIX_FADV_DONTNEED;
	int	sync_flag = SYNC_FILE_RANGE_WAIT_BEFORE |
			    SYNC_FILE_RANGE_WRITE |
			    SYNC_FILE_RANGE_WAIT_AFTER;
	unsigned int	i;
	ext2_loff_t	offset;

	if (pagesize < 1)
		return -1;

	offset = (ext2_loff_t)defrag_data.orig_start * block_size;
	offset = (offset / pagesize) * pagesize;

#ifdef HAVE_SYNC_FILE_RANGE
	/* Sync file for fadvise process */
	if (sync_file_range(fd, offset,
		(ext2_loff_t)pagesize * page_num, sync_flag) < 0)
		return -1;
#endif

	/* Try to release buffer cache which this process used,
	 * then other process can use the released buffer
	 */
	for (i = 0; i < page_num; i++) {
		if ((vec[i] & 0x1) == 0) {
			offset += pagesize;
			continue;
		}
		if ((errno = posix_fadvise(fd, offset,
					   pagesize, fadvise_flag)) != 0) {
			if ((mode_flag & DETAIL) && flag) {
				perror("\tFailed to fadvise");
				flag = 0;
			}
		}
		offset += pagesize;
	}

	return 0;
}

/*
 * check_free_size() -	Check if there's enough disk space.
 *
 * @fd:			defrag target file's descriptor.
 * @file:		file name.
 * @blk_count:		file blocks.
 */
static int check_free_size(int fd, const char *file, ext4_fsblk_t blk_count)
{
	ext4_fsblk_t	free_blk_count;
	struct statfs64	fsbuf;

	if (fstatfs64(fd, &fsbuf) < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(
				"Failed to get filesystem information");
		}
		return -1;
	}

	/* Compute free space for root and normal user separately */
	if (current_uid == ROOT_UID)
		free_blk_count = fsbuf.f_bfree;
	else
		free_blk_count = fsbuf.f_bavail;

	if (free_blk_count >= blk_count)
		return 0;

	return -ENOSPC;
}

/*
 * file_frag_count() -	Get file fragment count.
 *
 * @fd:			defrag target file's descriptor.
 */
static int file_frag_count(int fd)
{
	int	ret;
	struct fiemap	fiemap_buf;

	/* When fm_extent_count is 0,
	 * ioctl just get file fragment count.
	 */
	memset(&fiemap_buf, 0, sizeof(struct fiemap));
	fiemap_buf.fm_start = 0;
	fiemap_buf.fm_length = FIEMAP_MAX_OFFSET;
	fiemap_buf.fm_flags |= FIEMAP_FLAG_SYNC;

	ret = ioctl(fd, FS_IOC_FIEMAP, &fiemap_buf);
	if (ret < 0)
		return ret;

	return fiemap_buf.fm_mapped_extents;
}

/*
 * file_check() -	Check file's attributes.
 *
 * @fd:			defrag target file's descriptor.
 * @buf:		a pointer of the struct stat64.
 * @file:		file name.
 * @extents:		file extents.
 * @blk_count:		file blocks.
 */
static int file_check(int fd, const struct stat64 *buf, const char *file,
		int extents, ext4_fsblk_t blk_count)
{
	int	ret;
	struct flock	lock;

	/* Write-lock check is more reliable */
	lock.l_type = F_WRLCK;
	lock.l_start = 0;
	lock.l_whence = SEEK_SET;
	lock.l_len = 0;

	/* Free space */
	ret = check_free_size(fd, file, blk_count);
	if (ret < 0) {
		if ((mode_flag & DETAIL) && ret == -ENOSPC) {
			printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
				"  extents: %d -> %d\n", defraged_file_count,
				total_count, file, extents, extents);
			IN_FTW_PRINT_ERR_MSG(
			"Defrag size is larger than filesystem's free space");
		}
		return -1;
	}

	/* Access authority */
	if (current_uid != ROOT_UID &&
		buf->st_uid != current_uid) {
		if (mode_flag & DETAIL) {
			printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
				"  extents: %d -> %d\n", defraged_file_count,
				total_count, file, extents, extents);
			IN_FTW_PRINT_ERR_MSG(
				"File is not current user's file"
				" or current user is not root");
		}
		return -1;
	}

	/* Lock status */
	if (fcntl(fd, F_GETLK, &lock) < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(
				"Failed to get lock information");
		}
		return -1;
	} else if (lock.l_type != F_UNLCK) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			IN_FTW_PRINT_ERR_MSG("File has been locked");
		}
		return -1;
	}

	return 0;
}

/*
 * insert_extent_by_logical() -	Sequentially insert extent by logical.
 *
 * @ext_list_head:	the head of logical extent list.
 * @ext:		the extent element which will be inserted.
 */
static int insert_extent_by_logical(struct fiemap_extent_list **ext_list_head,
			struct fiemap_extent_list *ext)
{
	struct fiemap_extent_list	*ext_list_tmp = *ext_list_head;

	if (ext == NULL)
		goto out;

	/* First element */
	if (*ext_list_head == NULL) {
		(*ext_list_head) = ext;
		(*ext_list_head)->prev = *ext_list_head;
		(*ext_list_head)->next = *ext_list_head;
		return 0;
	}

	if (ext->data.logical <= ext_list_tmp->data.logical) {
		/* Insert before head */
		if (ext_list_tmp->data.logical <
			ext->data.logical + ext->data.len)
			/* Overlap */
			goto out;
		/* Adjust head */
		*ext_list_head = ext;
	} else {
		/* Insert into the middle or last of the list */
		do {
			if (ext->data.logical < ext_list_tmp->data.logical)
				break;
			ext_list_tmp = ext_list_tmp->next;
		} while (ext_list_tmp != (*ext_list_head));
		if (ext->data.logical <
		    ext_list_tmp->prev->data.logical +
			ext_list_tmp->prev->data.len)
			/* Overlap */
			goto out;

		if (ext_list_tmp != *ext_list_head &&
		    ext_list_tmp->data.logical <
		    ext->data.logical + ext->data.len)
			/* Overlap */
			goto out;
	}
	ext_list_tmp = ext_list_tmp->prev;
	/* Insert "ext" after "ext_list_tmp" */
	insert(ext_list_tmp, ext);
	return 0;
out:
	errno = EINVAL;
	return -1;
}

/*
 * insert_extent_by_physical() -	Sequentially insert extent by physical.
 *
 * @ext_list_head:	the head of physical extent list.
 * @ext:		the extent element which will be inserted.
 */
static int insert_extent_by_physical(struct fiemap_extent_list **ext_list_head,
			struct fiemap_extent_list *ext)
{
	struct fiemap_extent_list	*ext_list_tmp = *ext_list_head;

	if (ext == NULL)
		goto out;

	/* First element */
	if (*ext_list_head == NULL) {
		(*ext_list_head) = ext;
		(*ext_list_head)->prev = *ext_list_head;
		(*ext_list_head)->next = *ext_list_head;
		return 0;
	}

	if (ext->data.physical <= ext_list_tmp->data.physical) {
		/* Insert before head */
		if (ext_list_tmp->data.physical <
					ext->data.physical + ext->data.len)
			/* Overlap */
			goto out;
		/* Adjust head */
		*ext_list_head = ext;
	} else {
		/* Insert into the middle or last of the list */
		do {
			if (ext->data.physical < ext_list_tmp->data.physical)
				break;
			ext_list_tmp = ext_list_tmp->next;
		} while (ext_list_tmp != (*ext_list_head));
		if (ext->data.physical <
		    ext_list_tmp->prev->data.physical +
				ext_list_tmp->prev->data.len)
			/* Overlap */
			goto out;

		if (ext_list_tmp != *ext_list_head &&
		    ext_list_tmp->data.physical <
				ext->data.physical + ext->data.len)
			/* Overlap */
			goto out;
	}
	ext_list_tmp = ext_list_tmp->prev;
	/* Insert "ext" after "ext_list_tmp" */
	insert(ext_list_tmp, ext);
	return 0;
out:
	errno = EINVAL;
	return -1;
}

/*
 * insert_exts_group() -	Insert a exts_group.
 *
 * @ext_group_head:		the head of a exts_group list.
 * @exts_group:			the exts_group element which will be inserted.
 */
static int insert_exts_group(struct fiemap_extent_group **ext_group_head,
				struct fiemap_extent_group *exts_group)
{
	struct fiemap_extent_group	*ext_group_tmp = NULL;

	if (exts_group == NULL) {
		errno = EINVAL;
		return -1;
	}

	/* Initialize list */
	if (*ext_group_head == NULL) {
		(*ext_group_head) = exts_group;
		(*ext_group_head)->prev = *ext_group_head;
		(*ext_group_head)->next = *ext_group_head;
		return 0;
	}

	ext_group_tmp = (*ext_group_head)->prev;
	insert(ext_group_tmp, exts_group);

	return 0;
}

/*
 * join_extents() -		Find continuous region(exts_group).
 *
 * @ext_list_head:		the head of the extent list.
 * @ext_group_head:		the head of the target exts_group list.
 */
static int join_extents(struct fiemap_extent_list *ext_list_head,
		struct fiemap_extent_group **ext_group_head)
{
	__u64	len = ext_list_head->data.len;
	struct fiemap_extent_list *ext_list_start = ext_list_head;
	struct fiemap_extent_list *ext_list_tmp = ext_list_head->next;

	do {
		struct fiemap_extent_group	*ext_group_tmp = NULL;

		/* This extent and previous extent are not continuous,
		 * so, all previous extents are treated as an extent group.
		 */
		if ((ext_list_tmp->prev->data.logical +
			ext_list_tmp->prev->data.len)
				!= ext_list_tmp->data.logical) {
			ext_group_tmp =
				malloc(sizeof(struct fiemap_extent_group));
			if (ext_group_tmp == NULL)
				return -1;

			memset(ext_group_tmp, 0,
				sizeof(struct fiemap_extent_group));
			ext_group_tmp->len = len;
			ext_group_tmp->start = ext_list_start;
			ext_group_tmp->end = ext_list_tmp->prev;

			if (insert_exts_group(ext_group_head,
				ext_group_tmp) < 0) {
				FREE(ext_group_tmp);
				return -1;
			}
			ext_list_start = ext_list_tmp;
			len = ext_list_tmp->data.len;
			ext_list_tmp = ext_list_tmp->next;
			continue;
		}

		/* This extent and previous extent are continuous,
		 * so, they belong to the same extent group, and we check
		 * if the next extent belongs to the same extent group.
		 */
		len += ext_list_tmp->data.len;
		ext_list_tmp = ext_list_tmp->next;
	} while (ext_list_tmp != ext_list_head->next);

	return 0;
}

/*
 * get_file_extents() -	Get file's extent list.
 *
 * @fd:			defrag target file's descriptor.
 * @ext_list_head:	the head of the extent list.
 */
static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
{
	__u32	i;
	int	ret;
	int	ext_buf_size, fie_buf_size;
	__u64	pos = 0;
	struct fiemap	*fiemap_buf = NULL;
	struct fiemap_extent	*ext_buf = NULL;
	struct fiemap_extent_list	*ext_list = NULL;

	/* Convert units, in bytes.
	 * Be careful : now, physical block number in extent is 48bit,
	 * and the maximum blocksize for ext4 is 4K(12bit),
	 * so there is no overflow, but in future it may be changed.
	 */

	/* Alloc space for fiemap */
	ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
	fie_buf_size = sizeof(struct fiemap) + ext_buf_size;

	fiemap_buf = malloc(fie_buf_size);
	if (fiemap_buf == NULL)
		return -1;

	ext_buf = fiemap_buf->fm_extents;
	memset(fiemap_buf, 0, fie_buf_size);
	fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
	fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
	fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;

	do {
		fiemap_buf->fm_start = pos;
		memset(ext_buf, 0, ext_buf_size);
		ret = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
		if (ret < 0 || fiemap_buf->fm_mapped_extents == 0)
			goto out;
		for (i = 0; i < fiemap_buf->fm_mapped_extents; i++) {
			ext_list = NULL;
			ext_list = malloc(sizeof(struct fiemap_extent_list));
			if (ext_list == NULL)
				goto out;

			ext_list->data.physical = ext_buf[i].fe_physical
						/ block_size;
			ext_list->data.logical = ext_buf[i].fe_logical
						/ block_size;
			ext_list->data.len = ext_buf[i].fe_length
						/ block_size;

			ret = insert_extent_by_physical(
					ext_list_head, ext_list);
			if (ret < 0) {
				FREE(ext_list);
				goto out;
			}
		}
		/* Record file's logical offset this time */
		pos = ext_buf[EXTENT_MAX_COUNT-1].fe_logical +
			ext_buf[EXTENT_MAX_COUNT-1].fe_length;
		/*
		 * If fm_extents array has been filled and
		 * there are extents left, continue to cycle.
		 */
	} while (fiemap_buf->fm_mapped_extents
					== EXTENT_MAX_COUNT &&
		!(ext_buf[EXTENT_MAX_COUNT-1].fe_flags
					& FIEMAP_EXTENT_LAST));

	FREE(fiemap_buf);
	return 0;
out:
	FREE(fiemap_buf);
	return -1;
}

/*
 * get_logical_count() -	Get the file logical extents count.
 *
 * @logical_list_head:	the head of the logical extent list.
 */
static int get_logical_count(struct fiemap_extent_list *logical_list_head)
{
	int ret = 0;
	struct fiemap_extent_list *ext_list_tmp  = logical_list_head;

	do {
		ret++;
		ext_list_tmp = ext_list_tmp->next;
	} while (ext_list_tmp != logical_list_head);

	return ret;
}

/*
 * get_physical_count() -	Get the file physical extents count.
 *
 * @physical_list_head:	the head of the physical extent list.
 */
static int get_physical_count(struct fiemap_extent_list *physical_list_head)
{
	int ret = 0;
	struct fiemap_extent_list *ext_list_tmp = physical_list_head;

	do {
		if ((ext_list_tmp->data.physical + ext_list_tmp->data.len)
				!= ext_list_tmp->next->data.physical ||
		    (ext_list_tmp->data.logical + ext_list_tmp->data.len)
				!= ext_list_tmp->next->data.logical) {
			/* This extent and next extent are not continuous. */
			ret++;
		}

		ext_list_tmp = ext_list_tmp->next;
	} while (ext_list_tmp != physical_list_head);

	return ret;
}

/*
 * change_physical_to_logical() -	Change list from physical to logical.
 *
 * @physical_list_head:	the head of physical extent list.
 * @logical_list_head:	the head of logical extent list.
 */
static int change_physical_to_logical(
			struct fiemap_extent_list **physical_list_head,
			struct fiemap_extent_list **logical_list_head)
{
	int ret;
	struct fiemap_extent_list *ext_list_tmp = *physical_list_head;
	struct fiemap_extent_list *ext_list_next = ext_list_tmp->next;

	while (1) {
		if (ext_list_tmp == ext_list_next) {
			ret = insert_extent_by_logical(
				logical_list_head, ext_list_tmp);
			if (ret < 0)
				return -1;

			*physical_list_head = NULL;
			break;
		}

		ext_list_tmp->prev->next = ext_list_tmp->next;
		ext_list_tmp->next->prev = ext_list_tmp->prev;
		*physical_list_head = ext_list_next;

		ret = insert_extent_by_logical(
			logical_list_head, ext_list_tmp);
		if (ret < 0) {
			FREE(ext_list_tmp);
			return -1;
		}
		ext_list_tmp = ext_list_next;
		ext_list_next = ext_list_next->next;
	}

	return 0;
}

/* get_file_blocks() -  Get total file blocks.
 *
 * @ext_list_head:	the extent list head of the target file
 */
static ext4_fsblk_t get_file_blocks(struct fiemap_extent_list *ext_list_head)
{
	ext4_fsblk_t blk_count = 0;
	struct fiemap_extent_list *ext_list_tmp = ext_list_head;

	do {
		blk_count += ext_list_tmp->data.len;
		ext_list_tmp = ext_list_tmp->next;
	} while (ext_list_tmp != ext_list_head);

	return blk_count;
}

/*
 * free_ext() -		Free the extent list.
 *
 * @ext_list_head:	the extent list head of which will be free.
 */
static void free_ext(struct fiemap_extent_list *ext_list_head)
{
	struct fiemap_extent_list	*ext_list_tmp = NULL;

	if (ext_list_head == NULL)
		return;

	while (ext_list_head->next != ext_list_head) {
		ext_list_tmp = ext_list_head;
		ext_list_head->prev->next = ext_list_head->next;
		ext_list_head->next->prev = ext_list_head->prev;
		ext_list_head = ext_list_head->next;
		free(ext_list_tmp);
	}
	free(ext_list_head);
}

/*
 * free_exts_group() -		Free the exts_group.
 *
 * @*ext_group_head:	the exts_group list head which will be free.
 */
static void free_exts_group(struct fiemap_extent_group *ext_group_head)
{
	struct fiemap_extent_group	*ext_group_tmp = NULL;

	if (ext_group_head == NULL)
		return;

	while (ext_group_head->next != ext_group_head) {
		ext_group_tmp = ext_group_head;
		ext_group_head->prev->next = ext_group_head->next;
		ext_group_head->next->prev = ext_group_head->prev;
		ext_group_head = ext_group_head->next;
		free(ext_group_tmp);
	}
	free(ext_group_head);
}

/*
 * get_best_count() -	Get the file best extents count.
 *
 * @block_count:		the file's physical block count.
 */
static int get_best_count(ext4_fsblk_t block_count)
{
	int ret;
	unsigned int flex_bg_num;

	if (blocks_per_group == 0)
		return 1;

	if (feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
		flex_bg_num = 1U << log_groups_per_flex;
		ret = ((block_count - 1) /
			((ext4_fsblk_t)blocks_per_group *
				flex_bg_num)) + 1;
	} else
		ret = ((block_count - 1) / blocks_per_group) + 1;

	return ret;
}


/*
 * file_statistic() -	Get statistic info of the file's fragments.
 *
 * @file:		the file's name.
 * @buf:		the pointer of the struct stat64.
 * @flag:		file type.
 * @ftwbuf:		the pointer of a struct FTW.
 */
static int file_statistic(const char *file, const struct stat64 *buf,
			int flag EXT2FS_ATTR((unused)),
			struct FTW *ftwbuf EXT2FS_ATTR((unused)))
{
	int	fd;
	int	ret;
	int	now_ext_count, best_ext_count = 0, physical_ext_count;
	int	i, j;
	__u64	size_per_ext = 0;
	float	ratio = 0.0;
	ext4_fsblk_t	blk_count = 0;
	char	msg_buffer[PATH_MAX + 48];
	struct fiemap_extent_list *physical_list_head = NULL;
	struct fiemap_extent_list *logical_list_head = NULL;

	defraged_file_count++;
	if (defraged_file_count > total_count)
		total_count = defraged_file_count;

	if (mode_flag & DETAIL) {
		if (total_count == 1 && regular_count == 1)
			printf("<File>\n");
		else {
			printf("[%u/%u]", defraged_file_count, total_count);
			fflush(stdout);
		}
	}
	if (lost_found_dir[0] != '\0' &&
	    !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG(NGMSG_LOST_FOUND);
		}
			return 0;
	}

	if (!S_ISREG(buf->st_mode)) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG(NGMSG_FILE_UNREG);
		}
		return 0;
	}

	/* Access authority */
	if (current_uid != ROOT_UID &&
		buf->st_uid != current_uid) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG(
				"File is not current user's file"
				" or current user is not root");
		}
		return 0;
	}

	/* Empty file */
	if (buf->st_size == 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG("File size is 0");
		}
		return 0;
	}

	/* Has no blocks */
	if (buf->st_blocks == 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG("File has no blocks");
		}
		return 0;
	}

	fd = open64(file, O_RDONLY);
	if (fd < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
		}
		return 0;
	}

	/* Get file's physical extents  */
	ret = get_file_extents(fd, &physical_list_head);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Get the count of file's continuous physical region */
	physical_ext_count = get_physical_count(physical_list_head);

	/* Change list from physical to logical */
	ret = change_physical_to_logical(&physical_list_head,
							&logical_list_head);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Count file fragments before defrag */
	now_ext_count = get_logical_count(logical_list_head);

	if (current_uid == ROOT_UID) {
		/* Calculate the size per extent */
		blk_count = get_file_blocks(logical_list_head);

		best_ext_count = get_best_count(blk_count);

		/* e4defrag rounds size_per_ext up to a block size boundary */
		size_per_ext = blk_count * (buf->st_blksize / 1024) /
							now_ext_count;

		ratio = (float)(physical_ext_count - best_ext_count) * 100 /
							blk_count;

		extents_before_defrag += now_ext_count;
		extents_after_defrag += best_ext_count;
		files_block_count += blk_count;
	}

	if (total_count == 1 && regular_count == 1) {
		/* File only */
		if (mode_flag & DETAIL) {
			int count = 0;
			struct fiemap_extent_list *ext_list_tmp =
						logical_list_head;

			/* Print extents info */
			do {
				count++;
				printf("[ext %d]:\tstart %llu:\tlogical "
				       "%llu:\tlen %llu\n", count,
				       (unsigned long long)
				       ext_list_tmp->data.physical,
				       (unsigned long long)
				       ext_list_tmp->data.logical,
				       (unsigned long long)
				       ext_list_tmp->data.len);
				ext_list_tmp = ext_list_tmp->next;
			} while (ext_list_tmp != logical_list_head);

		} else {
			printf("%-40s%10s/%-10s%9s\n",
					"<File>", "now", "best", "size/ext");
			if (current_uid == ROOT_UID) {
				if (strlen(file) > 40)
					printf("%s\n%50d/%-10d%6llu KB\n",
					       file, now_ext_count,
					       best_ext_count,
					       (unsigned long long) size_per_ext);
				else
					printf("%-40s%10d/%-10d%6llu KB\n",
					       file, now_ext_count,
					       best_ext_count,
					       (unsigned long long) size_per_ext);
			} else {
				if (strlen(file) > 40)
					printf("%s\n%50d/%-10s%7s\n",
							file, now_ext_count,
							"-", "-");
				else
					printf("%-40s%10d/%-10s%7s\n",
							file, now_ext_count,
							"-", "-");
			}
		}
		succeed_cnt++;
		goto out;
	}

	if (mode_flag & DETAIL) {
		/* Print statistic info */
		sprintf(msg_buffer, "[%u/%u]%.*s",
				defraged_file_count, total_count,
			PATH_MAX, file);
		if (current_uid == ROOT_UID) {
			if (strlen(msg_buffer) > 40)
				printf("\033[79;0H\033[K%s\n"
				       "%50d/%-10d%6llu KB\n",
				       msg_buffer, now_ext_count,
				       best_ext_count,
				       (unsigned long long) size_per_ext);
			else
				printf("\033[79;0H\033[K%-40s"
				       "%10d/%-10d%6llu KB\n",
				       msg_buffer, now_ext_count,
				       best_ext_count,
				       (unsigned long long) size_per_ext);
		} else {
			if (strlen(msg_buffer) > 40)
				printf("\033[79;0H\033[K%s\n%50d/%-10s%7s\n",
						msg_buffer, now_ext_count,
							"-", "-");
			else
				printf("\033[79;0H\033[K%-40s%10d/%-10s%7s\n",
						msg_buffer, now_ext_count,
							"-", "-");
		}
	}

	for (i = 0; i < SHOW_FRAG_FILES; i++) {
		if (ratio >= frag_rank[i].ratio) {
			for (j = SHOW_FRAG_FILES - 1; j > i; j--) {
				memset(&frag_rank[j], 0,
					sizeof(struct frag_statistic_ino));
				strncpy(frag_rank[j].msg_buffer,
					frag_rank[j - 1].msg_buffer,
					strnlen(frag_rank[j - 1].msg_buffer,
					PATH_MAX));
				frag_rank[j].now_count =
					frag_rank[j - 1].now_count;
				frag_rank[j].best_count =
					frag_rank[j - 1].best_count;
				frag_rank[j].size_per_ext =
					frag_rank[j - 1].size_per_ext;
				frag_rank[j].ratio =
					frag_rank[j - 1].ratio;
			}
			memset(&frag_rank[i], 0,
					sizeof(struct frag_statistic_ino));
			strncpy(frag_rank[i].msg_buffer, file,
						strnlen(file, PATH_MAX));
			frag_rank[i].now_count = now_ext_count;
			frag_rank[i].best_count = best_ext_count;
			frag_rank[i].size_per_ext = size_per_ext;
			frag_rank[i].ratio = ratio;
			break;
		}
	}

	succeed_cnt++;

out:
	close(fd);
	free_ext(physical_list_head);
	free_ext(logical_list_head);
	return 0;
}

/*
 * print_progress -	Print defrag progress
 *
 * @file:		file name.
 * @start:		logical offset for defrag target file
 * @file_size:		defrag target filesize
 */
static void print_progress(const char *file, ext2_loff_t start,
			   ext2_loff_t file_size)
{
	int percent = (start * 100) / file_size;
	printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
		defraged_file_count, total_count, file, min(percent, 100));
	fflush(stdout);

	return;
}

/*
 * call_defrag() -	Execute the defrag program.
 *
 * @fd:			target file descriptor.
 * @donor_fd:		donor file descriptor.
 * @file:			target file name.
 * @buf:			pointer of the struct stat64.
 * @ext_list_head:	head of the extent list.
 */
static int call_defrag(int fd, int donor_fd, const char *file,
	const struct stat64 *buf, struct fiemap_extent_list *ext_list_head)
{
	ext2_loff_t	start = 0;
	unsigned int	page_num;
	unsigned char	*vec = NULL;
	int	defraged_ret = 0;
	int	ret;
	struct move_extent	move_data;
	struct fiemap_extent_list	*ext_list_tmp = NULL;

	memset(&move_data, 0, sizeof(struct move_extent));
	move_data.donor_fd = donor_fd;

	/* Print defrag progress */
	print_progress(file, start, buf->st_size);

	ext_list_tmp = ext_list_head;
	do {
		move_data.orig_start = ext_list_tmp->data.logical;
		/* Logical offset of orig and donor should be same */
		move_data.donor_start = move_data.orig_start;
		move_data.len = ext_list_tmp->data.len;
		move_data.moved_len = 0;

		ret = page_in_core(fd, move_data, &vec, &page_num);
		if (ret < 0) {
			if (mode_flag & DETAIL) {
				printf("\n");
				PRINT_ERR_MSG_WITH_ERRNO(
						"Failed to get file map");
			} else {
				printf("\t[ NG ]\n");
			}
			return -1;
		}

		/* EXT4_IOC_MOVE_EXT */
		defraged_ret =
			ioctl(fd, EXT4_IOC_MOVE_EXT, &move_data);

		/* Free pages */
		ret = defrag_fadvise(fd, move_data, vec, page_num);
		if (vec) {
			free(vec);
			vec = NULL;
		}
		if (ret < 0) {
			if (mode_flag & DETAIL) {
				printf("\n");
				PRINT_ERR_MSG_WITH_ERRNO(
					"Failed to free page");
			} else {
				printf("\t[ NG ]\n");
			}
			return -1;
		}

		if (defraged_ret < 0) {
			if (mode_flag & DETAIL) {
				printf("\n");
				PRINT_ERR_MSG_WITH_ERRNO(
					"Failed to defrag with "
					"EXT4_IOC_MOVE_EXT ioctl");
				if (errno == ENOTTY)
					printf("\tAt least 2.6.31-rc1 of "
						"vanilla kernel is required\n");
			} else {
				printf("\t[ NG ]\n");
			}
			return -1;
		}
		/* Adjust logical offset for next ioctl */
		move_data.orig_start += move_data.moved_len;
		move_data.donor_start = move_data.orig_start;

		start = move_data.orig_start * buf->st_blksize;

		/* Print defrag progress */
		print_progress(file, start, buf->st_size);

		/* End of file */
		if (start >= buf->st_size)
			break;

		ext_list_tmp = ext_list_tmp->next;
	} while (ext_list_tmp != ext_list_head);

	return 0;
}

/*
 * file_defrag() -		Check file attributes and call ioctl to defrag.
 *
 * @file:		the file's name.
 * @buf:		the pointer of the struct stat64.
 * @flag:		file type.
 * @ftwbuf:		the pointer of a struct FTW.
 */
static int file_defrag(const char *file, const struct stat64 *buf,
			int flag EXT2FS_ATTR((unused)),
			struct FTW *ftwbuf EXT2FS_ATTR((unused)))
{
	int	fd;
	int	donor_fd = -1;
	int	ret;
	int	best;
	int	file_frags_start, file_frags_end;
	int	orig_physical_cnt, donor_physical_cnt = 0;
	char	tmp_inode_name[PATH_MAX + 8];
	ext4_fsblk_t			blk_count = 0;
	struct fiemap_extent_list	*orig_list_physical = NULL;
	struct fiemap_extent_list	*orig_list_logical = NULL;
	struct fiemap_extent_list	*donor_list_physical = NULL;
	struct fiemap_extent_list	*donor_list_logical = NULL;
	struct fiemap_extent_group	*orig_group_head = NULL;
	struct fiemap_extent_group	*orig_group_tmp = NULL;

	defraged_file_count++;
	if (defraged_file_count > total_count)
		total_count = defraged_file_count;

	if (mode_flag & DETAIL) {
		printf("[%u/%u]", defraged_file_count, total_count);
		fflush(stdout);
	}

	if (lost_found_dir[0] != '\0' &&
	    !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			IN_FTW_PRINT_ERR_MSG(NGMSG_LOST_FOUND);
		}
		return 0;
	}

	if (!S_ISREG(buf->st_mode)) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			IN_FTW_PRINT_ERR_MSG(NGMSG_FILE_UNREG);
		}
		return 0;
	}

	/* Empty file */
	if (buf->st_size == 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			IN_FTW_PRINT_ERR_MSG("File size is 0");
		}
		return 0;
	}

	/* Has no blocks */
	if (buf->st_blocks == 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			STATISTIC_ERR_MSG("File has no blocks");
		}
		return 0;
	}

	fd = open64(file, O_RDWR);
	if (fd < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
		}
		return 0;
	}

	/* Get file's extents */
	ret = get_file_extents(fd, &orig_list_physical);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Get the count of file's continuous physical region */
	orig_physical_cnt = get_physical_count(orig_list_physical);

	/* Change list from physical to logical */
	ret = change_physical_to_logical(&orig_list_physical,
							&orig_list_logical);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Count file fragments before defrag */
	file_frags_start = get_logical_count(orig_list_logical);

	blk_count = get_file_blocks(orig_list_logical);
	if (file_check(fd, buf, file, file_frags_start, blk_count) < 0)
		goto out;

	if (fsync(fd) < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO("Failed to sync(fsync)");
		}
		goto out;
	}

	best = get_best_count(blk_count);

	if (file_frags_start <= best)
		goto check_improvement;

	/* Combine extents to group */
	ret = join_extents(orig_list_logical, &orig_group_head);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Create donor inode */
	memset(tmp_inode_name, 0, PATH_MAX + 8);
	sprintf(tmp_inode_name, "%.*s.defrag",
				(int)strnlen(file, PATH_MAX), file);
	donor_fd = open64(tmp_inode_name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR);
	if (donor_fd < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			if (errno == EEXIST)
				PRINT_ERR_MSG_WITH_ERRNO(
				"File is being defraged by other program");
			else
				PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
		}
		goto out;
	}

	/* Unlink donor inode */
	ret = unlink(tmp_inode_name);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO("Failed to unlink");
		}
		goto out;
	}

	/* Allocate space for donor inode */
	orig_group_tmp = orig_group_head;
	do {
		ret = fallocate(donor_fd, 0,
		  (ext2_loff_t)orig_group_tmp->start->data.logical * block_size,
		  (ext2_loff_t)orig_group_tmp->len * block_size);
		if (ret < 0) {
			if (mode_flag & DETAIL) {
				PRINT_FILE_NAME(file);
				PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
			}
			goto out;
		}

		orig_group_tmp = orig_group_tmp->next;
	} while (orig_group_tmp != orig_group_head);

	/* Get donor inode's extents */
	ret = get_file_extents(donor_fd, &donor_list_physical);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

	/* Calculate donor inode's continuous physical region */
	donor_physical_cnt = get_physical_count(donor_list_physical);

	/* Change donor extent list from physical to logical */
	ret = change_physical_to_logical(&donor_list_physical,
							&donor_list_logical);
	if (ret < 0) {
		if (mode_flag & DETAIL) {
			PRINT_FILE_NAME(file);
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
		}
		goto out;
	}

check_improvement:
	if (mode_flag & DETAIL) {
		if (file_frags_start != 1)
			frag_files_before_defrag++;

		extents_before_defrag += file_frags_start;
	}

	if (file_frags_start <= best ||
			orig_physical_cnt <= donor_physical_cnt) {
		printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
			defraged_file_count, total_count, file, 100);
		if (mode_flag & DETAIL)
			printf("  extents: %d -> %d",
				file_frags_start, file_frags_start);

		printf("\t[ OK ]\n");
		succeed_cnt++;

		if (file_frags_start != 1)
			frag_files_after_defrag++;

		extents_after_defrag += file_frags_start;
		goto out;
	}

	/* Defrag the file */
	ret = call_defrag(fd, donor_fd, file, buf, donor_list_logical);

	/* Count file fragments after defrag and print extents info */
	if (mode_flag & DETAIL) {
		file_frags_end = file_frag_count(fd);
		if (file_frags_end < 0) {
			printf("\n");
			PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_INFO);
			goto out;
		}

		if (file_frags_end != 1)
			frag_files_after_defrag++;

		extents_after_defrag += file_frags_end;

		if (ret < 0)
			goto out;

		printf("  extents: %d -> %d",
			file_frags_start, file_frags_end);
		fflush(stdout);
	}

	if (ret < 0)
		goto out;

	printf("\t[ OK ]\n");
	fflush(stdout);
	succeed_cnt++;

out:
	close(fd);
	if (donor_fd != -1)
		close(donor_fd);
	free_ext(orig_list_physical);
	free_ext(orig_list_logical);
	free_ext(donor_list_physical);
	free_exts_group(orig_group_head);
	return 0;
}

/*
 * main() -		Ext4 online defrag.
 *
 * @argc:		the number of parameter.
 * @argv[]:		the pointer array of parameter.
 */
int main(int argc, char *argv[])
{
	int	opt;
	int	i, j, ret = 0;
	int	flags = FTW_PHYS | FTW_MOUNT;
	int	arg_type = -1;
	int	mount_dir_len = 0;
	int	success_flag = 0;
	char	dir_name[PATH_MAX + 1];
	char	dev_name[PATH_MAX + 1];
	struct stat64	buf;
	ext2_filsys fs = NULL;

	printf("e4defrag %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);

	/* Parse arguments */
	if (argc == 1)
		goto out;

	while ((opt = getopt(argc, argv, "vc")) != EOF) {
		switch (opt) {
		case 'v':
			mode_flag |= DETAIL;
			break;
		case 'c':
			mode_flag |= STATISTIC;
			break;
		default:
			goto out;
		}
	}

	if (argc == optind)
		goto out;

	current_uid = getuid();

	/* Main process */
	for (i = optind; i < argc; i++) {
		succeed_cnt = 0;
		regular_count = 0;
		total_count = 0;
		frag_files_before_defrag = 0;
		frag_files_after_defrag = 0;
		extents_before_defrag = 0;
		extents_after_defrag = 0;
		defraged_file_count = 0;
		files_block_count = 0;
		blocks_per_group = 0;
		feature_incompat = 0;
		log_groups_per_flex = 0;

		memset(dir_name, 0, PATH_MAX + 1);
		memset(dev_name, 0, PATH_MAX + 1);
		memset(lost_found_dir, 0, PATH_MAX + 1);
		memset(frag_rank, 0,
			sizeof(struct frag_statistic_ino) * SHOW_FRAG_FILES);

		if ((mode_flag & STATISTIC) && i > optind)
			printf("\n");

#if BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN
		PRINT_ERR_MSG("Endian's type is not big/little endian");
		PRINT_FILE_NAME(argv[i]);
		continue;
#endif

		if (lstat64(argv[i], &buf) < 0) {
			perror(NGMSG_FILE_INFO);
			PRINT_FILE_NAME(argv[i]);
			continue;
		}

		/* Handle i.e. lvm device symlinks */
		if (S_ISLNK(buf.st_mode)) {
			struct stat64	buf2;

			if (stat64(argv[i], &buf2) == 0 &&
			    S_ISBLK(buf2.st_mode))
				buf = buf2;
		}

		if (S_ISBLK(buf.st_mode)) {
			/* Block device */
			strncpy(dev_name, argv[i], strnlen(argv[i], PATH_MAX));
			if (get_mount_point(argv[i], dir_name, PATH_MAX) < 0)
				continue;
			if (lstat64(dir_name, &buf) < 0) {
				perror(NGMSG_FILE_INFO);
				PRINT_FILE_NAME(argv[i]);
				continue;
			}
			arg_type = DEVNAME;
			if (!(mode_flag & STATISTIC))
				printf("ext4 defragmentation for device(%s)\n",
					argv[i]);
		} else if (S_ISDIR(buf.st_mode)) {
			/* Directory */
			if (access(argv[i], R_OK) < 0) {
				perror(argv[i]);
				continue;
			}
			arg_type = DIRNAME;
			strncpy(dir_name, argv[i], strnlen(argv[i], PATH_MAX));
		} else if (S_ISREG(buf.st_mode)) {
			/* Regular file */
			arg_type = FILENAME;
		} else {
			/* Irregular file */
			PRINT_ERR_MSG(NGMSG_FILE_UNREG);
			PRINT_FILE_NAME(argv[i]);
			continue;
		}

		/* Set blocksize */
		block_size = buf.st_blksize;

		/* For device case,
		 * filesystem type checked in get_mount_point()
		 */
		if (arg_type == FILENAME || arg_type == DIRNAME) {
			if (is_ext4(argv[i], dev_name) < 0)
				continue;
			if (realpath(argv[i], dir_name) == NULL) {
				perror("Couldn't get full path");
				PRINT_FILE_NAME(argv[i]);
				continue;
			}
		}

		if (current_uid == ROOT_UID) {
			/* Get super block info */
			ret = ext2fs_open(dev_name, EXT2_FLAG_64BITS, 0,
					  block_size, unix_io_manager, &fs);
			if (ret) {
				if (mode_flag & DETAIL)
					fprintf(stderr,
						"Warning: couldn't get file "
						"system details for %s: %s\n",
						dev_name, error_message(ret));
			} else {
				blocks_per_group = fs->super->s_blocks_per_group;
				feature_incompat = fs->super->s_feature_incompat;
				log_groups_per_flex = fs->super->s_log_groups_per_flex;
				ext2fs_close_free(&fs);
			}
		}

		switch (arg_type) {

		case DIRNAME:
			if (!(mode_flag & STATISTIC))
				printf("ext4 defragmentation "
					"for directory(%s)\n", argv[i]);

			mount_dir_len = strnlen(lost_found_dir, PATH_MAX);

			strncat(lost_found_dir, "/lost+found",
				PATH_MAX - strnlen(lost_found_dir, PATH_MAX));

			/* Not the case("e4defrag  mount_point_dir") */
			if (dir_name[mount_dir_len] != '\0') {
				/*
				 * "e4defrag mount_point_dir/lost+found"
				 * or "e4defrag mount_point_dir/lost+found/"
				 */
				if (strncmp(lost_found_dir, dir_name,
					    strnlen(lost_found_dir,
						    PATH_MAX)) == 0 &&
				    (dir_name[strnlen(lost_found_dir,
						      PATH_MAX)] == '\0' ||
				     dir_name[strnlen(lost_found_dir,
						      PATH_MAX)] == '/')) {
					PRINT_ERR_MSG(NGMSG_LOST_FOUND);
					PRINT_FILE_NAME(argv[i]);
					continue;
				}

				/* "e4defrag mount_point_dir/else_dir" */
				memset(lost_found_dir, 0, PATH_MAX + 1);
			}
			/* fall through */
		case DEVNAME:
			if (arg_type == DEVNAME) {
				strcpy(lost_found_dir, dir_name);
				strncat(lost_found_dir, "/lost+found/",
					PATH_MAX - strlen(lost_found_dir));
			}

			nftw64(dir_name, calc_entry_counts, FTW_OPEN_FD, flags);

			if (mode_flag & STATISTIC) {
				if (mode_flag & DETAIL)
					printf("%-40s%10s/%-10s%9s\n",
					"<File>", "now", "best", "size/ext");

				if (!(mode_flag & DETAIL) &&
						current_uid != ROOT_UID) {
					printf(" Done.\n");
					success_flag = 1;
					continue;
				}

				nftw64(dir_name, file_statistic,
							FTW_OPEN_FD, flags);

				if (succeed_cnt != 0 &&
					current_uid == ROOT_UID) {
					if (mode_flag & DETAIL)
						printf("\n");
					printf("%-40s%10s/%-10s%9s\n",
						"<Fragmented files>", "now",
						"best", "size/ext");
					for (j = 0; j < SHOW_FRAG_FILES; j++) {
						if (strlen(frag_rank[j].
							msg_buffer) > 37) {
							printf("%d. %s\n%50d/"
							"%-10d%6llu KB\n",
							j + 1,
							frag_rank[j].msg_buffer,
							frag_rank[j].now_count,
							frag_rank[j].best_count,
							(unsigned long long)
							frag_rank[j].
								size_per_ext);
						} else if (strlen(frag_rank[j].
							msg_buffer) > 0) {
							printf("%d. %-37s%10d/"
							"%-10d%6llu KB\n",
							j + 1,
							frag_rank[j].msg_buffer,
							frag_rank[j].now_count,
							frag_rank[j].best_count,
							(unsigned long long)
							frag_rank[j].
								size_per_ext);
						} else
							break;
					}
				}
				break;
			}
			/* File tree walk */
			nftw64(dir_name, file_defrag, FTW_OPEN_FD, flags);
			printf("\n\tSuccess:\t\t\t[ %u/%u ]\n", succeed_cnt,
				total_count);
			printf("\tFailure:\t\t\t[ %u/%u ]\n",
				total_count - succeed_cnt, total_count);
			if (mode_flag & DETAIL) {
				printf("\tTotal extents:\t\t\t%4d->%d\n",
					extents_before_defrag,
					extents_after_defrag);
				printf("\tFragmented percentage:\t\t"
					"%3llu%%->%llu%%\n",
					!regular_count ? 0 :
					((unsigned long long)
					frag_files_before_defrag * 100) /
					regular_count,
					!regular_count ? 0 :
					((unsigned long long)
					frag_files_after_defrag * 100) /
					regular_count);
			}
			break;
		case FILENAME:
			total_count = 1;
			regular_count = 1;
			strncat(lost_found_dir, "/lost+found/",
				PATH_MAX - strnlen(lost_found_dir,
						   PATH_MAX));
			if (strncmp(lost_found_dir, dir_name,
				    strnlen(lost_found_dir,
					    PATH_MAX)) == 0) {
				PRINT_ERR_MSG(NGMSG_LOST_FOUND);
				PRINT_FILE_NAME(argv[i]);
				continue;
			}

			if (mode_flag & STATISTIC) {
				file_statistic(argv[i], &buf, FTW_F, NULL);
				break;
			} else
				printf("ext4 defragmentation for %s\n",
								 argv[i]);
			/* Defrag single file process */
			file_defrag(argv[i], &buf, FTW_F, NULL);
			if (succeed_cnt != 0)
				printf(" Success:\t\t\t[1/1]\n");
			else
				printf(" Success:\t\t\t[0/1]\n");

			break;
		}

		if (succeed_cnt != 0)
			success_flag = 1;
		if (mode_flag & STATISTIC) {
			if (current_uid != ROOT_UID) {
				printf(" Done.\n");
				continue;
			}

			if (!succeed_cnt) {
				if (mode_flag & DETAIL)
					printf("\n");

				if (arg_type == DEVNAME)
					printf(" In this device(%s), "
					"none can be defragmented.\n", argv[i]);
				else if (arg_type == DIRNAME)
					printf(" In this directory(%s), "
					"none can be defragmented.\n", argv[i]);
				else
					printf(" This file(%s) "
					"can't be defragmented.\n", argv[i]);
			} else {
				float files_ratio = 0.0;
				float score = 0.0;
				__u64 size_per_ext = files_block_count *
						(buf.st_blksize / 1024) /
						extents_before_defrag;
				files_ratio = (float)(extents_before_defrag -
						extents_after_defrag) *
						100 / files_block_count;
				score = CALC_SCORE(files_ratio);
				printf("\n Total/best extents\t\t\t\t%d/%d\n"
				       " Average size per extent"
				       "\t\t\t%llu KB\n"
				       " Fragmentation score\t\t\t\t%.0f\n",
				       extents_before_defrag,
				       extents_after_defrag,
				       (unsigned long long) size_per_ext, score);
				printf(" [0-30 no problem:"
					" 31-55 a little bit fragmented:"
					" 56- needs defrag]\n");

				if (arg_type == DEVNAME)
					printf(" This device (%s) ", argv[i]);
				else if (arg_type == DIRNAME)
					printf(" This directory (%s) ",
								argv[i]);
				else
					printf(" This file (%s) ", argv[i]);

				if (score > BOUND_SCORE)
					printf("needs defragmentation.\n");
				else
					printf("does not need "
							"defragmentation.\n");
			}
			printf(" Done.\n");
		}

	}

	if (success_flag)
		return 0;

	exit(1);

out:
	printf(MSG_USAGE);
	exit(1);
}