2 * e4defrag.c - ext4 filesystem defragmenter
4 * Copyright (C) 2009 NEC Software Tohoku, Ltd.
6 * Author: Akira Fujita <a-fujita@rs.jp.nec.com>
7 * Takashi Sato <t-sato@yk.jp.nec.com>
10 #ifndef _LARGEFILE_SOURCE
11 #define _LARGEFILE_SOURCE
14 #ifndef _LARGEFILE64_SOURCE
15 #define _LARGEFILE64_SOURCE
34 #include <ext2fs/ext2_types.h>
35 #include <ext2fs/ext2fs.h>
37 #include <sys/ioctl.h>
38 #include <ext2fs/fiemap.h>
41 #include <sys/statfs.h>
42 #include <sys/syscall.h>
45 /* A relatively new ioctl interface ... */
46 #ifndef EXT4_IOC_MOVE_EXT
47 #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
51 #define PRINT_ERR_MSG(msg) fprintf(stderr, "%s\n", (msg))
52 #define IN_FTW_PRINT_ERR_MSG(msg) \
53 fprintf(stderr, "\t%s\t\t[ NG ]\n", (msg))
54 #define PRINT_FILE_NAME(file) fprintf(stderr, " \"%s\"\n", (file))
55 #define PRINT_ERR_MSG_WITH_ERRNO(msg) \
56 fprintf(stderr, "\t%s:%s\t[ NG ]\n", (msg), strerror(errno))
57 #define STATISTIC_ERR_MSG(msg) \
58 fprintf(stderr, "\t%s\n", (msg))
59 #define STATISTIC_ERR_MSG_WITH_ERRNO(msg) \
60 fprintf(stderr, "\t%s:%s\n", (msg), strerror(errno))
61 #define min(x, y) (((x) > (y)) ? (y) : (x))
62 #define CALC_SCORE(ratio) \
63 ((ratio) > 10 ? (80 + 20 * (ratio) / 100) : (8 * (ratio)))
64 /* Wrap up the free function */
70 /* Insert list2 after list1 */
71 #define insert(list1, list2) \
73 list2->next = list1->next; \
74 list1->next->prev = list2; \
75 list2->prev = list1; \
76 list1->next = list2; \
79 /* To delete unused warning */
81 #define EXT2FS_ATTR(x) __attribute__(x)
83 #define EXT2FS_ATTR(x)
86 /* The mode of defrag */
88 #define STATISTIC 0x02
94 #define FTW_OPEN_FD 2000
96 #define FS_EXT4 "ext4"
99 #define BOUND_SCORE 55
100 #define SHOW_FRAG_FILES 5
102 /* Magic number for ext4 */
103 #define EXT4_SUPER_MAGIC 0xEF53
105 /* Definition of flex_bg */
106 #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
108 /* The following macro is used for ioctl FS_IOC_FIEMAP
109 * EXTENT_MAX_COUNT: the maximum number of extents for exchanging between
110 * kernel-space and user-space per ioctl
112 #define EXTENT_MAX_COUNT 512
114 /* The following macros are error message */
116 "Usage : e4defrag [-v] file...| directory...| device...\n\
117 : e4defrag -c file...| directory...| device...\n"
119 #define NGMSG_EXT4 "Filesystem is not ext4 filesystem"
120 #define NGMSG_FILE_EXTENT "Failed to get file extents"
121 #define NGMSG_FILE_INFO "Failed to get file information"
122 #define NGMSG_FILE_OPEN "Failed to open"
123 #define NGMSG_FILE_UNREG "File is not regular file"
124 #define NGMSG_LOST_FOUND "Can not process \"lost+found\""
126 /* Data type for filesystem-wide blocks number */
127 typedef unsigned long long ext4_fsblk_t
;
129 struct fiemap_extent_data
{
130 __u64 len
; /* blocks count */
131 __u64 logical
; /* start logical block number */
132 ext4_fsblk_t physical
; /* start physical block number */
135 struct fiemap_extent_list
{
136 struct fiemap_extent_list
*prev
;
137 struct fiemap_extent_list
*next
;
138 struct fiemap_extent_data data
; /* extent belong to file */
141 struct fiemap_extent_group
{
142 struct fiemap_extent_group
*prev
;
143 struct fiemap_extent_group
*next
;
144 __u64 len
; /* length of this continuous region */
145 struct fiemap_extent_list
*start
; /* start ext */
146 struct fiemap_extent_list
*end
; /* end ext */
150 __s32 reserved
; /* original file descriptor */
151 __u32 donor_fd
; /* donor file descriptor */
152 __u64 orig_start
; /* logical start offset in block for orig */
153 __u64 donor_start
; /* logical start offset in block for donor */
154 __u64 len
; /* block length to be moved */
155 __u64 moved_len
; /* moved block length */
158 struct frag_statistic_ino
{
159 int now_count
; /* the file's extents count of before defrag */
160 int best_count
; /* the best file's extents count */
161 __u64 size_per_ext
; /* size(KB) per extent */
162 float ratio
; /* the ratio of fragmentation */
163 char msg_buffer
[PATH_MAX
+ 1]; /* pathname of the file */
166 char lost_found_dir
[PATH_MAX
+ 1];
168 int extents_before_defrag
;
169 int extents_after_defrag
;
171 unsigned int current_uid
;
172 unsigned int defraged_file_count
;
173 unsigned int frag_files_before_defrag
;
174 unsigned int frag_files_after_defrag
;
175 unsigned int regular_count
;
176 unsigned int succeed_cnt
;
177 unsigned int total_count
;
178 __u8 log_groups_per_flex
;
179 __u32 blocks_per_group
;
180 __u32 feature_incompat
;
181 ext4_fsblk_t files_block_count
;
182 struct frag_statistic_ino frag_rank
[SHOW_FRAG_FILES
];
185 /* Local definitions of some syscalls glibc may not yet have */
187 #ifndef HAVE_POSIX_FADVISE
188 #warning Using locally defined posix_fadvise interface.
190 #ifndef __NR_fadvise64_64
191 #error Your kernel headers dont define __NR_fadvise64_64
195 * fadvise() - Give advice about file access.
197 * @fd: defrag target file's descriptor.
198 * @offset: file offset.
200 * @advise: process flag.
202 static int posix_fadvise(int fd
, loff_t offset
, size_t len
, int advise
)
204 return syscall(__NR_fadvise64_64
, fd
, offset
, len
, advise
);
206 #endif /* ! HAVE_FADVISE64_64 */
208 #ifndef HAVE_SYNC_FILE_RANGE
209 #warning Using locally defined sync_file_range interface.
211 #ifndef __NR_sync_file_range
212 #ifndef __NR_sync_file_range2 /* ppc */
213 #error Your kernel headers dont define __NR_sync_file_range
218 * sync_file_range() - Sync file region.
220 * @fd: defrag target file's descriptor.
221 * @offset: file offset.
222 * @length: area length.
223 * @flag: process flag.
225 int sync_file_range(int fd
, loff_t offset
, loff_t length
, unsigned int flag
)
227 #ifdef __NR_sync_file_range
228 return syscall(__NR_sync_file_range
, fd
, offset
, length
, flag
);
230 return syscall(__NR_sync_file_range2
, fd
, flag
, offset
, length
);
233 #endif /* ! HAVE_SYNC_FILE_RANGE */
235 #ifndef HAVE_FALLOCATE64
236 #warning Using locally defined fallocate syscall interface.
238 #ifndef __NR_fallocate
239 #error Your kernel headers dont define __NR_fallocate
243 * fallocate64() - Manipulate file space.
245 * @fd: defrag target file's descriptor.
246 * @mode: process flag.
247 * @offset: file offset.
250 static int fallocate64(int fd
, int mode
, loff_t offset
, loff_t len
)
252 return syscall(__NR_fallocate
, fd
, mode
, offset
, len
);
254 #endif /* ! HAVE_FALLOCATE */
257 * get_mount_point() - Get device's mount point.
259 * @devname: the device's name.
260 * @mount_point: the mount point.
261 * @dir_path_len: the length of directory.
263 static int get_mount_point(const char *devname
, char *mount_point
,
266 /* Refer to /etc/mtab */
267 const char *mtab
= MOUNTED
;
269 struct mntent
*mnt
= NULL
;
271 fp
= setmntent(mtab
, "r");
273 perror("Couldn't access /etc/mtab");
277 while ((mnt
= getmntent(fp
)) != NULL
) {
278 if (strcmp(devname
, mnt
->mnt_fsname
) != 0)
282 if (strcmp(mnt
->mnt_type
, FS_EXT4
) == 0) {
283 strncpy(mount_point
, mnt
->mnt_dir
,
287 PRINT_ERR_MSG(NGMSG_EXT4
);
291 PRINT_ERR_MSG("Filesystem is not mounted");
296 * is_ext4() - Whether on an ext4 filesystem.
298 * @file: the file's name.
300 static int is_ext4(const char *file
, char *devname
)
305 char *mnt_type
= NULL
;
306 /* Refer to /etc/mtab */
307 const char *mtab
= MOUNTED
;
308 char file_path
[PATH_MAX
+ 1];
309 struct mntent
*mnt
= NULL
;
310 struct statfs64 fsbuf
;
313 if (realpath(file
, file_path
) == NULL
) {
314 perror("Couldn't get full path");
315 PRINT_FILE_NAME(file
);
319 if (statfs64(file_path
, &fsbuf
) < 0) {
320 perror("Failed to get filesystem information");
321 PRINT_FILE_NAME(file
);
325 if (fsbuf
.f_type
!= EXT4_SUPER_MAGIC
) {
326 PRINT_ERR_MSG(NGMSG_EXT4
);
330 fp
= setmntent(mtab
, "r");
332 perror("Couldn't access /etc/mtab");
336 while ((mnt
= getmntent(fp
)) != NULL
) {
337 if (mnt
->mnt_fsname
[0] != '/')
339 len
= strlen(mnt
->mnt_dir
);
340 ret
= memcmp(file_path
, mnt
->mnt_dir
, len
);
349 mnt_type
= realloc(mnt_type
, strlen(mnt
->mnt_type
) + 1);
350 if (mnt_type
== NULL
) {
354 memset(mnt_type
, 0, strlen(mnt
->mnt_type
) + 1);
355 strncpy(mnt_type
, mnt
->mnt_type
, strlen(mnt
->mnt_type
));
356 strncpy(lost_found_dir
, mnt
->mnt_dir
, PATH_MAX
);
357 strncpy(devname
, mnt
->mnt_fsname
, strlen(mnt
->mnt_fsname
) + 1);
361 if (strcmp(mnt_type
, FS_EXT4
) == 0) {
366 PRINT_ERR_MSG(NGMSG_EXT4
);
372 * calc_entry_counts() - Calculate file counts.
377 * @ftwbuf: the pointer of a struct FTW.
379 static int calc_entry_counts(const char *file
EXT2FS_ATTR((unused
)),
380 const struct stat64
*buf
, int flag
EXT2FS_ATTR((unused
)),
381 struct FTW
*ftwbuf
EXT2FS_ATTR((unused
)))
383 if (S_ISREG(buf
->st_mode
))
392 * page_in_core() - Get information on whether pages are in core.
394 * @fd: defrag target file's descriptor.
395 * @defrag_data: data used for defrag.
396 * @vec: page state array.
397 * @page_num: page number.
399 static int page_in_core(int fd
, struct move_extent defrag_data
,
400 unsigned char **vec
, unsigned int *page_num
)
402 long pagesize
= sysconf(_SC_PAGESIZE
);
404 loff_t offset
, end_offset
, length
;
406 if (vec
== NULL
|| *vec
!= NULL
)
409 /* In mmap, offset should be a multiple of the page size */
410 offset
= (loff_t
)defrag_data
.orig_start
* block_size
;
411 length
= (loff_t
)defrag_data
.len
* block_size
;
412 end_offset
= offset
+ length
;
413 /* Round the offset down to the nearest multiple of pagesize */
414 offset
= (offset
/ pagesize
) * pagesize
;
415 length
= end_offset
- offset
;
417 page
= mmap(NULL
, length
, PROT_READ
, MAP_SHARED
, fd
, offset
);
418 if (page
== MAP_FAILED
)
422 *page_num
= (length
+ pagesize
- 1) / pagesize
;
423 *vec
= (unsigned char *)calloc(*page_num
, 1);
427 /* Get information on whether pages are in core */
428 if (mincore(page
, (size_t)length
, *vec
) == -1 ||
429 munmap(page
, length
) == -1) {
438 * defrag_fadvise() - Predeclare an access pattern for file data.
440 * @fd: defrag target file's descriptor.
441 * @defrag_data: data used for defrag.
442 * @vec: page state array.
443 * @page_num: page number.
445 static int defrag_fadvise(int fd
, struct move_extent defrag_data
,
446 unsigned char *vec
, unsigned int page_num
)
449 long pagesize
= sysconf(_SC_PAGESIZE
);
450 int fadvise_flag
= POSIX_FADV_DONTNEED
;
451 int sync_flag
= SYNC_FILE_RANGE_WAIT_BEFORE
|
452 SYNC_FILE_RANGE_WRITE
|
453 SYNC_FILE_RANGE_WAIT_AFTER
;
457 offset
= (loff_t
)defrag_data
.orig_start
* block_size
;
458 offset
= (offset
/ pagesize
) * pagesize
;
460 /* Sync file for fadvise process */
461 if (sync_file_range(fd
, offset
,
462 (loff_t
)pagesize
* page_num
, sync_flag
) < 0)
465 /* Try to release buffer cache which this process used,
466 * then other process can use the released buffer
468 for (i
= 0; i
< page_num
; i
++) {
469 if ((vec
[i
] & 0x1) == 0) {
473 if (posix_fadvise(fd
, offset
, pagesize
, fadvise_flag
) < 0) {
474 if ((mode_flag
& DETAIL
) && flag
) {
475 perror("\tFailed to fadvise");
486 * check_free_size() - Check if there's enough disk space.
488 * @fd: defrag target file's descriptor.
490 * @blk_count: file blocks.
492 static int check_free_size(int fd
, const char *file
, ext4_fsblk_t blk_count
)
494 ext4_fsblk_t free_blk_count
;
495 struct statfs64 fsbuf
;
497 if (fstatfs64(fd
, &fsbuf
) < 0) {
498 if (mode_flag
& DETAIL
) {
499 PRINT_FILE_NAME(file
);
500 PRINT_ERR_MSG_WITH_ERRNO(
501 "Failed to get filesystem information");
506 /* Compute free space for root and normal user separately */
507 if (current_uid
== ROOT_UID
)
508 free_blk_count
= fsbuf
.f_bfree
;
510 free_blk_count
= fsbuf
.f_bavail
;
512 if (free_blk_count
>= blk_count
)
519 * file_frag_count() - Get file fragment count.
521 * @fd: defrag target file's descriptor.
523 static int file_frag_count(int fd
)
526 struct fiemap fiemap_buf
;
528 /* When fm_extent_count is 0,
529 * ioctl just get file fragment count.
531 memset(&fiemap_buf
, 0, sizeof(struct fiemap
));
532 fiemap_buf
.fm_start
= 0;
533 fiemap_buf
.fm_length
= FIEMAP_MAX_OFFSET
;
534 fiemap_buf
.fm_flags
|= FIEMAP_FLAG_SYNC
;
536 ret
= ioctl(fd
, FS_IOC_FIEMAP
, &fiemap_buf
);
540 return fiemap_buf
.fm_mapped_extents
;
544 * file_check() - Check file's attributes.
546 * @fd: defrag target file's descriptor.
547 * @buf: a pointer of the struct stat64.
549 * @extents: file extents.
550 * @blk_count: file blocks.
552 static int file_check(int fd
, const struct stat64
*buf
, const char *file
,
553 int extents
, ext4_fsblk_t blk_count
)
558 /* Write-lock check is more reliable */
559 lock
.l_type
= F_WRLCK
;
561 lock
.l_whence
= SEEK_SET
;
565 ret
= check_free_size(fd
, file
, blk_count
);
567 if ((mode_flag
& DETAIL
) && ret
== -ENOSPC
) {
568 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
569 " extents: %d -> %d\n", defraged_file_count
,
570 total_count
, file
, extents
, extents
);
571 IN_FTW_PRINT_ERR_MSG(
572 "Defrag size is larger than filesystem's free space");
577 /* Access authority */
578 if (current_uid
!= ROOT_UID
&&
579 buf
->st_uid
!= current_uid
) {
580 if (mode_flag
& DETAIL
) {
581 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
582 " extents: %d -> %d\n", defraged_file_count
,
583 total_count
, file
, extents
, extents
);
584 IN_FTW_PRINT_ERR_MSG(
585 "File is not current user's file"
586 " or current user is not root");
592 if (fcntl(fd
, F_GETLK
, &lock
) < 0) {
593 if (mode_flag
& DETAIL
) {
594 PRINT_FILE_NAME(file
);
595 PRINT_ERR_MSG_WITH_ERRNO(
596 "Failed to get lock information");
599 } else if (lock
.l_type
!= F_UNLCK
) {
600 if (mode_flag
& DETAIL
) {
601 PRINT_FILE_NAME(file
);
602 IN_FTW_PRINT_ERR_MSG("File has been locked");
611 * insert_extent_by_logical() - Sequentially insert extent by logical.
613 * @ext_list_head: the head of logical extent list.
614 * @ext: the extent element which will be inserted.
616 static int insert_extent_by_logical(struct fiemap_extent_list
**ext_list_head
,
617 struct fiemap_extent_list
*ext
)
619 struct fiemap_extent_list
*ext_list_tmp
= *ext_list_head
;
625 if (*ext_list_head
== NULL
) {
626 (*ext_list_head
) = ext
;
627 (*ext_list_head
)->prev
= *ext_list_head
;
628 (*ext_list_head
)->next
= *ext_list_head
;
632 if (ext
->data
.logical
<= ext_list_tmp
->data
.logical
) {
633 /* Insert before head */
634 if (ext_list_tmp
->data
.logical
<
635 ext
->data
.logical
+ ext
->data
.len
)
639 *ext_list_head
= ext
;
641 /* Insert into the middle or last of the list */
643 if (ext
->data
.logical
< ext_list_tmp
->data
.logical
)
645 ext_list_tmp
= ext_list_tmp
->next
;
646 } while (ext_list_tmp
!= (*ext_list_head
));
647 if (ext
->data
.logical
<
648 ext_list_tmp
->prev
->data
.logical
+
649 ext_list_tmp
->prev
->data
.len
)
653 if (ext_list_tmp
!= *ext_list_head
&&
654 ext_list_tmp
->data
.logical
<
655 ext
->data
.logical
+ ext
->data
.len
)
659 ext_list_tmp
= ext_list_tmp
->prev
;
660 /* Insert "ext" after "ext_list_tmp" */
661 insert(ext_list_tmp
, ext
);
669 * insert_extent_by_physical() - Sequentially insert extent by physical.
671 * @ext_list_head: the head of physical extent list.
672 * @ext: the extent element which will be inserted.
674 static int insert_extent_by_physical(struct fiemap_extent_list
**ext_list_head
,
675 struct fiemap_extent_list
*ext
)
677 struct fiemap_extent_list
*ext_list_tmp
= *ext_list_head
;
683 if (*ext_list_head
== NULL
) {
684 (*ext_list_head
) = ext
;
685 (*ext_list_head
)->prev
= *ext_list_head
;
686 (*ext_list_head
)->next
= *ext_list_head
;
690 if (ext
->data
.physical
<= ext_list_tmp
->data
.physical
) {
691 /* Insert before head */
692 if (ext_list_tmp
->data
.physical
<
693 ext
->data
.physical
+ ext
->data
.len
)
697 *ext_list_head
= ext
;
699 /* Insert into the middle or last of the list */
701 if (ext
->data
.physical
< ext_list_tmp
->data
.physical
)
703 ext_list_tmp
= ext_list_tmp
->next
;
704 } while (ext_list_tmp
!= (*ext_list_head
));
705 if (ext
->data
.physical
<
706 ext_list_tmp
->prev
->data
.physical
+
707 ext_list_tmp
->prev
->data
.len
)
711 if (ext_list_tmp
!= *ext_list_head
&&
712 ext_list_tmp
->data
.physical
<
713 ext
->data
.physical
+ ext
->data
.len
)
717 ext_list_tmp
= ext_list_tmp
->prev
;
718 /* Insert "ext" after "ext_list_tmp" */
719 insert(ext_list_tmp
, ext
);
727 * insert_exts_group() - Insert a exts_group.
729 * @ext_group_head: the head of a exts_group list.
730 * @exts_group: the exts_group element which will be inserted.
732 static int insert_exts_group(struct fiemap_extent_group
**ext_group_head
,
733 struct fiemap_extent_group
*exts_group
)
735 struct fiemap_extent_group
*ext_group_tmp
= NULL
;
737 if (exts_group
== NULL
) {
742 /* Initialize list */
743 if (*ext_group_head
== NULL
) {
744 (*ext_group_head
) = exts_group
;
745 (*ext_group_head
)->prev
= *ext_group_head
;
746 (*ext_group_head
)->next
= *ext_group_head
;
750 ext_group_tmp
= (*ext_group_head
)->prev
;
751 insert(ext_group_tmp
, exts_group
);
757 * join_extents() - Find continuous region(exts_group).
759 * @ext_list_head: the head of the extent list.
760 * @ext_group_head: the head of the target exts_group list.
762 static int join_extents(struct fiemap_extent_list
*ext_list_head
,
763 struct fiemap_extent_group
**ext_group_head
)
765 __u64 len
= ext_list_head
->data
.len
;
766 struct fiemap_extent_list
*ext_list_start
= ext_list_head
;
767 struct fiemap_extent_list
*ext_list_tmp
= ext_list_head
->next
;
770 struct fiemap_extent_group
*ext_group_tmp
= NULL
;
772 /* This extent and previous extent are not continuous,
773 * so, all previous extents are treated as an extent group.
775 if ((ext_list_tmp
->prev
->data
.logical
+
776 ext_list_tmp
->prev
->data
.len
)
777 != ext_list_tmp
->data
.logical
) {
779 malloc(sizeof(struct fiemap_extent_group
));
780 if (ext_group_tmp
== NULL
)
783 memset(ext_group_tmp
, 0,
784 sizeof(struct fiemap_extent_group
));
785 ext_group_tmp
->len
= len
;
786 ext_group_tmp
->start
= ext_list_start
;
787 ext_group_tmp
->end
= ext_list_tmp
->prev
;
789 if (insert_exts_group(ext_group_head
,
790 ext_group_tmp
) < 0) {
794 ext_list_start
= ext_list_tmp
;
795 len
= ext_list_tmp
->data
.len
;
796 ext_list_tmp
= ext_list_tmp
->next
;
800 /* This extent and previous extent are continuous,
801 * so, they belong to the same extent group, and we check
802 * if the next extent belongs to the same extent group.
804 len
+= ext_list_tmp
->data
.len
;
805 ext_list_tmp
= ext_list_tmp
->next
;
806 } while (ext_list_tmp
!= ext_list_head
->next
);
812 * get_file_extents() - Get file's extent list.
814 * @fd: defrag target file's descriptor.
815 * @ext_list_head: the head of the extent list.
817 static int get_file_extents(int fd
, struct fiemap_extent_list
**ext_list_head
)
821 int ext_buf_size
, fie_buf_size
;
823 struct fiemap
*fiemap_buf
= NULL
;
824 struct fiemap_extent
*ext_buf
= NULL
;
825 struct fiemap_extent_list
*ext_list
= NULL
;
827 /* Convert units, in bytes.
828 * Be careful : now, physical block number in extent is 48bit,
829 * and the maximum blocksize for ext4 is 4K(12bit),
830 * so there is no overflow, but in future it may be changed.
833 /* Alloc space for fiemap */
834 ext_buf_size
= EXTENT_MAX_COUNT
* sizeof(struct fiemap_extent
);
835 fie_buf_size
= sizeof(struct fiemap
) + ext_buf_size
;
837 fiemap_buf
= malloc(fie_buf_size
);
838 if (fiemap_buf
== NULL
)
841 ext_buf
= fiemap_buf
->fm_extents
;
842 memset(fiemap_buf
, 0, fie_buf_size
);
843 fiemap_buf
->fm_length
= FIEMAP_MAX_OFFSET
;
844 fiemap_buf
->fm_flags
|= FIEMAP_FLAG_SYNC
;
845 fiemap_buf
->fm_extent_count
= EXTENT_MAX_COUNT
;
848 fiemap_buf
->fm_start
= pos
;
849 memset(ext_buf
, 0, ext_buf_size
);
850 ret
= ioctl(fd
, FS_IOC_FIEMAP
, fiemap_buf
);
851 if (ret
< 0 || fiemap_buf
->fm_mapped_extents
== 0)
853 for (i
= 0; i
< fiemap_buf
->fm_mapped_extents
; i
++) {
855 ext_list
= malloc(sizeof(struct fiemap_extent_list
));
856 if (ext_list
== NULL
)
859 ext_list
->data
.physical
= ext_buf
[i
].fe_physical
861 ext_list
->data
.logical
= ext_buf
[i
].fe_logical
863 ext_list
->data
.len
= ext_buf
[i
].fe_length
866 ret
= insert_extent_by_physical(
867 ext_list_head
, ext_list
);
873 /* Record file's logical offset this time */
874 pos
= ext_buf
[EXTENT_MAX_COUNT
-1].fe_logical
+
875 ext_buf
[EXTENT_MAX_COUNT
-1].fe_length
;
877 * If fm_extents array has been filled and
878 * there are extents left, continue to cycle.
880 } while (fiemap_buf
->fm_mapped_extents
881 == EXTENT_MAX_COUNT
&&
882 !(ext_buf
[EXTENT_MAX_COUNT
-1].fe_flags
883 & FIEMAP_EXTENT_LAST
));
893 * get_logical_count() - Get the file logical extents count.
895 * @logical_list_head: the head of the logical extent list.
897 static int get_logical_count(struct fiemap_extent_list
*logical_list_head
)
900 struct fiemap_extent_list
*ext_list_tmp
= logical_list_head
;
904 ext_list_tmp
= ext_list_tmp
->next
;
905 } while (ext_list_tmp
!= logical_list_head
);
911 * get_physical_count() - Get the file physical extents count.
913 * @physical_list_head: the head of the physical extent list.
915 static int get_physical_count(struct fiemap_extent_list
*physical_list_head
)
918 struct fiemap_extent_list
*ext_list_tmp
= physical_list_head
;
921 if ((ext_list_tmp
->data
.physical
+ ext_list_tmp
->data
.len
)
922 != ext_list_tmp
->next
->data
.physical
) {
923 /* This extent and next extent are not continuous. */
927 ext_list_tmp
= ext_list_tmp
->next
;
928 } while (ext_list_tmp
!= physical_list_head
);
934 * change_physical_to_logical() - Change list from physical to logical.
936 * @physical_list_head: the head of physical extent list.
937 * @logical_list_head: the head of logical extent list.
939 static int change_physical_to_logical(
940 struct fiemap_extent_list
**physical_list_head
,
941 struct fiemap_extent_list
**logical_list_head
)
944 struct fiemap_extent_list
*ext_list_tmp
= *physical_list_head
;
945 struct fiemap_extent_list
*ext_list_next
= ext_list_tmp
->next
;
948 if (ext_list_tmp
== ext_list_next
) {
949 ret
= insert_extent_by_logical(
950 logical_list_head
, ext_list_tmp
);
954 *physical_list_head
= NULL
;
958 ext_list_tmp
->prev
->next
= ext_list_tmp
->next
;
959 ext_list_tmp
->next
->prev
= ext_list_tmp
->prev
;
960 *physical_list_head
= ext_list_next
;
962 ret
= insert_extent_by_logical(
963 logical_list_head
, ext_list_tmp
);
968 ext_list_tmp
= ext_list_next
;
969 ext_list_next
= ext_list_next
->next
;
975 /* get_file_blocks() - Get total file blocks.
977 * @ext_list_head: the extent list head of the target file
979 static ext4_fsblk_t
get_file_blocks(struct fiemap_extent_list
*ext_list_head
)
981 ext4_fsblk_t blk_count
= 0;
982 struct fiemap_extent_list
*ext_list_tmp
= ext_list_head
;
985 blk_count
+= ext_list_tmp
->data
.len
;
986 ext_list_tmp
= ext_list_tmp
->next
;
987 } while (ext_list_tmp
!= ext_list_head
);
993 * free_ext() - Free the extent list.
995 * @ext_list_head: the extent list head of which will be free.
997 static void free_ext(struct fiemap_extent_list
*ext_list_head
)
999 struct fiemap_extent_list
*ext_list_tmp
= NULL
;
1001 if (ext_list_head
== NULL
)
1004 while (ext_list_head
->next
!= ext_list_head
) {
1005 ext_list_tmp
= ext_list_head
;
1006 ext_list_head
->prev
->next
= ext_list_head
->next
;
1007 ext_list_head
->next
->prev
= ext_list_head
->prev
;
1008 ext_list_head
= ext_list_head
->next
;
1011 free(ext_list_head
);
1015 * free_exts_group() - Free the exts_group.
1017 * @*ext_group_head: the exts_group list head which will be free.
1019 static void free_exts_group(struct fiemap_extent_group
*ext_group_head
)
1021 struct fiemap_extent_group
*ext_group_tmp
= NULL
;
1023 if (ext_group_head
== NULL
)
1026 while (ext_group_head
->next
!= ext_group_head
) {
1027 ext_group_tmp
= ext_group_head
;
1028 ext_group_head
->prev
->next
= ext_group_head
->next
;
1029 ext_group_head
->next
->prev
= ext_group_head
->prev
;
1030 ext_group_head
= ext_group_head
->next
;
1031 free(ext_group_tmp
);
1033 free(ext_group_head
);
1037 * get_best_count() - Get the file best extents count.
1039 * @block_count: the file's physical block count.
1041 static int get_best_count(ext4_fsblk_t block_count
)
1044 unsigned int flex_bg_num
;
1046 /* Calcuate best extents count */
1047 if (feature_incompat
& EXT4_FEATURE_INCOMPAT_FLEX_BG
) {
1048 flex_bg_num
= 1 << log_groups_per_flex
;
1049 ret
= ((block_count
- 1) /
1050 ((ext4_fsblk_t
)blocks_per_group
*
1053 ret
= ((block_count
- 1) / blocks_per_group
) + 1;
1060 * file_statistic() - Get statistic info of the file's fragments.
1062 * @file: the file's name.
1063 * @buf: the pointer of the struct stat64.
1065 * @ftwbuf: the pointer of a struct FTW.
1067 static int file_statistic(const char *file
, const struct stat64
*buf
,
1068 int flag
EXT2FS_ATTR((unused
)),
1069 struct FTW
*ftwbuf
EXT2FS_ATTR((unused
)))
1073 int now_ext_count
, best_ext_count
= 0, physical_ext_count
;
1075 __u64 size_per_ext
= 0;
1077 ext4_fsblk_t blk_count
= 0;
1078 char msg_buffer
[PATH_MAX
+ 24];
1079 struct fiemap_extent_list
*physical_list_head
= NULL
;
1080 struct fiemap_extent_list
*logical_list_head
= NULL
;
1082 defraged_file_count
++;
1084 if (mode_flag
& DETAIL
) {
1085 if (total_count
== 1 && regular_count
== 1)
1088 printf("[%u/%u]", defraged_file_count
, total_count
);
1092 if (lost_found_dir
[0] != '\0' &&
1093 !memcmp(file
, lost_found_dir
, strnlen(lost_found_dir
, PATH_MAX
))) {
1094 if (mode_flag
& DETAIL
) {
1095 PRINT_FILE_NAME(file
);
1096 STATISTIC_ERR_MSG(NGMSG_LOST_FOUND
);
1101 if (!S_ISREG(buf
->st_mode
)) {
1102 if (mode_flag
& DETAIL
) {
1103 PRINT_FILE_NAME(file
);
1104 STATISTIC_ERR_MSG(NGMSG_FILE_UNREG
);
1109 /* Access authority */
1110 if (current_uid
!= ROOT_UID
&&
1111 buf
->st_uid
!= current_uid
) {
1112 if (mode_flag
& DETAIL
) {
1113 PRINT_FILE_NAME(file
);
1115 "File is not current user's file"
1116 " or current user is not root");
1122 if (buf
->st_size
== 0) {
1123 if (mode_flag
& DETAIL
) {
1124 PRINT_FILE_NAME(file
);
1125 STATISTIC_ERR_MSG("File size is 0");
1131 if (buf
->st_blocks
== 0) {
1132 if (mode_flag
& DETAIL
) {
1133 PRINT_FILE_NAME(file
);
1134 STATISTIC_ERR_MSG("File has no blocks");
1139 fd
= open64(file
, O_RDONLY
);
1141 if (mode_flag
& DETAIL
) {
1142 PRINT_FILE_NAME(file
);
1143 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN
);
1148 /* Get file's physical extents */
1149 ret
= get_file_extents(fd
, &physical_list_head
);
1151 if (mode_flag
& DETAIL
) {
1152 PRINT_FILE_NAME(file
);
1153 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1158 /* Get the count of file's continuous physical region */
1159 physical_ext_count
= get_physical_count(physical_list_head
);
1161 /* Change list from physical to logical */
1162 ret
= change_physical_to_logical(&physical_list_head
,
1163 &logical_list_head
);
1165 if (mode_flag
& DETAIL
) {
1166 PRINT_FILE_NAME(file
);
1167 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1172 /* Count file fragments before defrag */
1173 now_ext_count
= get_logical_count(logical_list_head
);
1175 if (current_uid
== ROOT_UID
) {
1176 /* Calculate the size per extent */
1177 blk_count
= get_file_blocks(logical_list_head
);
1179 best_ext_count
= get_best_count(blk_count
);
1181 /* e4defrag rounds size_per_ext up to a block size boundary */
1182 size_per_ext
= blk_count
* (buf
->st_blksize
/ 1024) /
1185 ratio
= (float)(physical_ext_count
- best_ext_count
) * 100 /
1188 extents_before_defrag
+= now_ext_count
;
1189 extents_after_defrag
+= best_ext_count
;
1190 files_block_count
+= blk_count
;
1193 if (total_count
== 1 && regular_count
== 1) {
1195 if (mode_flag
& DETAIL
) {
1197 struct fiemap_extent_list
*ext_list_tmp
=
1200 /* Print extents info */
1203 printf("[ext %d]:\tstart %llu:\tlogical "
1204 "%llu:\tlen %llu\n", count
,
1205 ext_list_tmp
->data
.physical
,
1206 ext_list_tmp
->data
.logical
,
1207 ext_list_tmp
->data
.len
);
1208 ext_list_tmp
= ext_list_tmp
->next
;
1209 } while (ext_list_tmp
!= logical_list_head
);
1212 printf("%-40s%10s/%-10s%9s\n",
1213 "<File>", "now", "best", "size/ext");
1214 if (current_uid
== ROOT_UID
) {
1215 if (strlen(file
) > 40)
1216 printf("%s\n%50d/%-10d%6llu KB\n",
1217 file
, now_ext_count
,
1218 best_ext_count
, size_per_ext
);
1220 printf("%-40s%10d/%-10d%6llu KB\n",
1221 file
, now_ext_count
,
1222 best_ext_count
, size_per_ext
);
1224 if (strlen(file
) > 40)
1225 printf("%s\n%50d/%-10s%7s\n",
1226 file
, now_ext_count
,
1229 printf("%-40s%10d/%-10s%7s\n",
1230 file
, now_ext_count
,
1238 if (mode_flag
& DETAIL
) {
1239 /* Print statistic info */
1240 sprintf(msg_buffer
, "[%u/%u]%s",
1241 defraged_file_count
, total_count
, file
);
1242 if (current_uid
== ROOT_UID
) {
1243 if (strlen(msg_buffer
) > 40)
1244 printf("\033[79;0H\033[K%s\n"
1245 "%50d/%-10d%6llu KB\n",
1246 msg_buffer
, now_ext_count
,
1247 best_ext_count
, size_per_ext
);
1249 printf("\033[79;0H\033[K%-40s"
1250 "%10d/%-10d%6llu KB\n",
1251 msg_buffer
, now_ext_count
,
1252 best_ext_count
, size_per_ext
);
1254 if (strlen(msg_buffer
) > 40)
1255 printf("\033[79;0H\033[K%s\n%50d/%-10s%7s\n",
1256 msg_buffer
, now_ext_count
,
1259 printf("\033[79;0H\033[K%-40s%10d/%-10s%7s\n",
1260 msg_buffer
, now_ext_count
,
1265 for (i
= 0; i
< SHOW_FRAG_FILES
; i
++) {
1266 if (ratio
>= frag_rank
[i
].ratio
) {
1267 for (j
= SHOW_FRAG_FILES
- 1; j
> i
; j
--) {
1268 memset(&frag_rank
[j
], 0,
1269 sizeof(struct frag_statistic_ino
));
1270 strncpy(frag_rank
[j
].msg_buffer
,
1271 frag_rank
[j
- 1].msg_buffer
,
1272 strnlen(frag_rank
[j
- 1].msg_buffer
,
1274 frag_rank
[j
].now_count
=
1275 frag_rank
[j
- 1].now_count
;
1276 frag_rank
[j
].best_count
=
1277 frag_rank
[j
- 1].best_count
;
1278 frag_rank
[j
].size_per_ext
=
1279 frag_rank
[j
- 1].size_per_ext
;
1280 frag_rank
[j
].ratio
=
1281 frag_rank
[j
- 1].ratio
;
1283 memset(&frag_rank
[i
], 0,
1284 sizeof(struct frag_statistic_ino
));
1285 strncpy(frag_rank
[i
].msg_buffer
, file
,
1286 strnlen(file
, PATH_MAX
));
1287 frag_rank
[i
].now_count
= now_ext_count
;
1288 frag_rank
[i
].best_count
= best_ext_count
;
1289 frag_rank
[i
].size_per_ext
= size_per_ext
;
1290 frag_rank
[i
].ratio
= ratio
;
1299 free_ext(physical_list_head
);
1300 free_ext(logical_list_head
);
1305 * print_progress - Print defrag progress
1308 * @start: logical offset for defrag target file
1309 * @file_size: defrag target filesize
1311 static void print_progress(const char *file
, loff_t start
, loff_t file_size
)
1313 int percent
= (start
* 100) / file_size
;
1314 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1315 defraged_file_count
, total_count
, file
, min(percent
, 100));
1322 * call_defrag() - Execute the defrag program.
1324 * @fd: target file descriptor.
1325 * @donor_fd: donor file descriptor.
1326 * @file: target file name.
1327 * @buf: pointer of the struct stat64.
1328 * @ext_list_head: head of the extent list.
1330 static int call_defrag(int fd
, int donor_fd
, const char *file
,
1331 const struct stat64
*buf
, struct fiemap_extent_list
*ext_list_head
)
1334 unsigned int page_num
;
1335 unsigned char *vec
= NULL
;
1336 int defraged_ret
= 0;
1338 struct move_extent move_data
;
1339 struct fiemap_extent_list
*ext_list_tmp
= NULL
;
1341 memset(&move_data
, 0, sizeof(struct move_extent
));
1342 move_data
.donor_fd
= donor_fd
;
1344 /* Print defrag progress */
1345 print_progress(file
, start
, buf
->st_size
);
1347 ext_list_tmp
= ext_list_head
;
1349 move_data
.orig_start
= ext_list_tmp
->data
.logical
;
1350 /* Logical offset of orig and donor should be same */
1351 move_data
.donor_start
= move_data
.orig_start
;
1352 move_data
.len
= ext_list_tmp
->data
.len
;
1353 move_data
.moved_len
= 0;
1355 ret
= page_in_core(fd
, move_data
, &vec
, &page_num
);
1357 if (mode_flag
& DETAIL
) {
1359 PRINT_ERR_MSG_WITH_ERRNO(
1360 "Failed to get file map");
1362 printf("\t[ NG ]\n");
1367 /* EXT4_IOC_MOVE_EXT */
1369 ioctl(fd
, EXT4_IOC_MOVE_EXT
, &move_data
);
1372 ret
= defrag_fadvise(fd
, move_data
, vec
, page_num
);
1378 if (mode_flag
& DETAIL
) {
1380 PRINT_ERR_MSG_WITH_ERRNO(
1381 "Failed to free page");
1383 printf("\t[ NG ]\n");
1388 if (defraged_ret
< 0) {
1389 if (mode_flag
& DETAIL
) {
1391 PRINT_ERR_MSG_WITH_ERRNO(
1392 "Failed to defrag with "
1393 "EXT4_IOC_MOVE_EXT ioctl");
1394 if (errno
== ENOTTY
)
1395 printf("\tAt least 2.6.31-rc1 of "
1396 "vanilla kernel is required\n");
1398 printf("\t[ NG ]\n");
1402 /* Adjust logical offset for next ioctl */
1403 move_data
.orig_start
+= move_data
.moved_len
;
1404 move_data
.donor_start
= move_data
.orig_start
;
1406 start
= move_data
.orig_start
* buf
->st_blksize
;
1408 /* Print defrag progress */
1409 print_progress(file
, start
, buf
->st_size
);
1412 if (start
>= buf
->st_size
)
1415 ext_list_tmp
= ext_list_tmp
->next
;
1416 } while (ext_list_tmp
!= ext_list_head
);
1422 * file_defrag() - Check file attributes and call ioctl to defrag.
1424 * @file: the file's name.
1425 * @buf: the pointer of the struct stat64.
1427 * @ftwbuf: the pointer of a struct FTW.
1429 static int file_defrag(const char *file
, const struct stat64
*buf
,
1430 int flag
EXT2FS_ATTR((unused
)),
1431 struct FTW
*ftwbuf
EXT2FS_ATTR((unused
)))
1437 int file_frags_start
, file_frags_end
;
1438 int orig_physical_cnt
, donor_physical_cnt
= 0;
1439 char tmp_inode_name
[PATH_MAX
+ 8];
1440 ext4_fsblk_t blk_count
= 0;
1441 struct fiemap_extent_list
*orig_list_physical
= NULL
;
1442 struct fiemap_extent_list
*orig_list_logical
= NULL
;
1443 struct fiemap_extent_list
*donor_list_physical
= NULL
;
1444 struct fiemap_extent_list
*donor_list_logical
= NULL
;
1445 struct fiemap_extent_group
*orig_group_head
= NULL
;
1446 struct fiemap_extent_group
*orig_group_tmp
= NULL
;
1448 defraged_file_count
++;
1450 if (mode_flag
& DETAIL
) {
1451 printf("[%u/%u]", defraged_file_count
, total_count
);
1455 if (lost_found_dir
[0] != '\0' &&
1456 !memcmp(file
, lost_found_dir
, strnlen(lost_found_dir
, PATH_MAX
))) {
1457 if (mode_flag
& DETAIL
) {
1458 PRINT_FILE_NAME(file
);
1459 IN_FTW_PRINT_ERR_MSG(NGMSG_LOST_FOUND
);
1464 if (!S_ISREG(buf
->st_mode
)) {
1465 if (mode_flag
& DETAIL
) {
1466 PRINT_FILE_NAME(file
);
1467 IN_FTW_PRINT_ERR_MSG(NGMSG_FILE_UNREG
);
1473 if (buf
->st_size
== 0) {
1474 if (mode_flag
& DETAIL
) {
1475 PRINT_FILE_NAME(file
);
1476 IN_FTW_PRINT_ERR_MSG("File size is 0");
1482 if (buf
->st_blocks
== 0) {
1483 if (mode_flag
& DETAIL
) {
1484 PRINT_FILE_NAME(file
);
1485 STATISTIC_ERR_MSG("File has no blocks");
1490 fd
= open64(file
, O_RDWR
);
1492 if (mode_flag
& DETAIL
) {
1493 PRINT_FILE_NAME(file
);
1494 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN
);
1499 /* Get file's extents */
1500 ret
= get_file_extents(fd
, &orig_list_physical
);
1502 if (mode_flag
& DETAIL
) {
1503 PRINT_FILE_NAME(file
);
1504 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1509 /* Get the count of file's continuous physical region */
1510 orig_physical_cnt
= get_physical_count(orig_list_physical
);
1512 /* Change list from physical to logical */
1513 ret
= change_physical_to_logical(&orig_list_physical
,
1514 &orig_list_logical
);
1516 if (mode_flag
& DETAIL
) {
1517 PRINT_FILE_NAME(file
);
1518 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1523 /* Count file fragments before defrag */
1524 file_frags_start
= get_logical_count(orig_list_logical
);
1526 blk_count
= get_file_blocks(orig_list_logical
);
1527 if (file_check(fd
, buf
, file
, file_frags_start
, blk_count
) < 0)
1530 if (fsync(fd
) < 0) {
1531 if (mode_flag
& DETAIL
) {
1532 PRINT_FILE_NAME(file
);
1533 PRINT_ERR_MSG_WITH_ERRNO("Failed to sync(fsync)");
1538 if (current_uid
== ROOT_UID
)
1539 best
= get_best_count(blk_count
);
1543 if (file_frags_start
<= best
)
1544 goto check_improvement
;
1546 /* Combine extents to group */
1547 ret
= join_extents(orig_list_logical
, &orig_group_head
);
1549 if (mode_flag
& DETAIL
) {
1550 PRINT_FILE_NAME(file
);
1551 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1556 /* Create donor inode */
1557 memset(tmp_inode_name
, 0, PATH_MAX
+ 8);
1558 sprintf(tmp_inode_name
, "%.*s.defrag",
1559 (int)strnlen(file
, PATH_MAX
), file
);
1560 donor_fd
= open64(tmp_inode_name
, O_WRONLY
| O_CREAT
| O_EXCL
, S_IRUSR
);
1562 if (mode_flag
& DETAIL
) {
1563 PRINT_FILE_NAME(file
);
1564 if (errno
== EEXIST
)
1565 PRINT_ERR_MSG_WITH_ERRNO(
1566 "File is being defraged by other program");
1568 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN
);
1573 /* Unlink donor inode */
1574 ret
= unlink(tmp_inode_name
);
1576 if (mode_flag
& DETAIL
) {
1577 PRINT_FILE_NAME(file
);
1578 PRINT_ERR_MSG_WITH_ERRNO("Failed to unlink");
1583 /* Allocate space for donor inode */
1584 orig_group_tmp
= orig_group_head
;
1586 ret
= fallocate64(donor_fd
, 0,
1587 (loff_t
)orig_group_tmp
->start
->data
.logical
* block_size
,
1588 (loff_t
)orig_group_tmp
->len
* block_size
);
1590 if (mode_flag
& DETAIL
) {
1591 PRINT_FILE_NAME(file
);
1592 PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
1597 orig_group_tmp
= orig_group_tmp
->next
;
1598 } while (orig_group_tmp
!= orig_group_head
);
1600 /* Get donor inode's extents */
1601 ret
= get_file_extents(donor_fd
, &donor_list_physical
);
1603 if (mode_flag
& DETAIL
) {
1604 PRINT_FILE_NAME(file
);
1605 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1610 /* Calcuate donor inode's continuous physical region */
1611 donor_physical_cnt
= get_physical_count(donor_list_physical
);
1613 /* Change donor extent list from physical to logical */
1614 ret
= change_physical_to_logical(&donor_list_physical
,
1615 &donor_list_logical
);
1617 if (mode_flag
& DETAIL
) {
1618 PRINT_FILE_NAME(file
);
1619 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT
);
1625 if (mode_flag
& DETAIL
) {
1626 if (file_frags_start
!= 1)
1627 frag_files_before_defrag
++;
1629 extents_before_defrag
+= file_frags_start
;
1632 if (file_frags_start
<= best
||
1633 orig_physical_cnt
<= donor_physical_cnt
) {
1634 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1635 defraged_file_count
, total_count
, file
, 100);
1636 if (mode_flag
& DETAIL
)
1637 printf(" extents: %d -> %d",
1638 file_frags_start
, file_frags_start
);
1640 printf("\t[ OK ]\n");
1643 if (file_frags_start
!= 1)
1644 frag_files_after_defrag
++;
1646 extents_after_defrag
+= file_frags_start
;
1650 /* Defrag the file */
1651 ret
= call_defrag(fd
, donor_fd
, file
, buf
, donor_list_logical
);
1653 /* Count file fragments after defrag and print extents info */
1654 if (mode_flag
& DETAIL
) {
1655 file_frags_end
= file_frag_count(fd
);
1656 if (file_frags_end
< 0) {
1658 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_INFO
);
1662 if (file_frags_end
!= 1)
1663 frag_files_after_defrag
++;
1665 extents_after_defrag
+= file_frags_end
;
1670 printf(" extents: %d -> %d",
1671 file_frags_start
, file_frags_end
);
1678 printf("\t[ OK ]\n");
1686 free_ext(orig_list_physical
);
1687 free_ext(orig_list_logical
);
1688 free_ext(donor_list_physical
);
1689 free_exts_group(orig_group_head
);
1694 * main() - Ext4 online defrag.
1696 * @argc: the number of parameter.
1697 * @argv[]: the pointer array of parameter.
1699 int main(int argc
, char *argv
[])
1703 int flags
= FTW_PHYS
| FTW_MOUNT
;
1705 int success_flag
= 0;
1706 char dir_name
[PATH_MAX
+ 1];
1707 char dev_name
[PATH_MAX
+ 1];
1709 ext2_filsys fs
= NULL
;
1711 /* Parse arguments */
1715 while ((opt
= getopt(argc
, argv
, "vc")) != EOF
) {
1718 mode_flag
|= DETAIL
;
1721 mode_flag
|= STATISTIC
;
1731 current_uid
= getuid();
1734 for (i
= optind
; i
< argc
; i
++) {
1738 frag_files_before_defrag
= 0;
1739 frag_files_after_defrag
= 0;
1740 extents_before_defrag
= 0;
1741 extents_after_defrag
= 0;
1742 defraged_file_count
= 0;
1743 files_block_count
= 0;
1744 blocks_per_group
= 0;
1745 feature_incompat
= 0;
1746 log_groups_per_flex
= 0;
1748 memset(dir_name
, 0, PATH_MAX
+ 1);
1749 memset(dev_name
, 0, PATH_MAX
+ 1);
1750 memset(lost_found_dir
, 0, PATH_MAX
+ 1);
1751 memset(frag_rank
, 0,
1752 sizeof(struct frag_statistic_ino
) * SHOW_FRAG_FILES
);
1754 if ((mode_flag
& STATISTIC
) && i
> optind
)
1757 #if BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN
1758 PRINT_ERR_MSG("Endian's type is not big/little endian");
1759 PRINT_FILE_NAME(argv
[i
]);
1763 if (lstat64(argv
[i
], &buf
) < 0) {
1764 perror(NGMSG_FILE_INFO
);
1765 PRINT_FILE_NAME(argv
[i
]);
1769 if (S_ISBLK(buf
.st_mode
)) {
1771 strncpy(dev_name
, argv
[i
], strnlen(argv
[i
], PATH_MAX
));
1772 if (get_mount_point(argv
[i
], dir_name
, PATH_MAX
) < 0)
1774 if (lstat64(dir_name
, &buf
) < 0) {
1775 perror(NGMSG_FILE_INFO
);
1776 PRINT_FILE_NAME(argv
[i
]);
1780 if (!(mode_flag
& STATISTIC
))
1781 printf("ext4 defragmentation for device(%s)\n",
1783 } else if (S_ISDIR(buf
.st_mode
)) {
1785 if (access(argv
[i
], R_OK
) < 0) {
1790 strncpy(dir_name
, argv
[i
], strnlen(argv
[i
], PATH_MAX
));
1791 } else if (S_ISREG(buf
.st_mode
)) {
1793 arg_type
= FILENAME
;
1795 /* Irregular file */
1796 PRINT_ERR_MSG(NGMSG_FILE_UNREG
);
1797 PRINT_FILE_NAME(argv
[i
]);
1802 block_size
= buf
.st_blksize
;
1805 * filesystem type checked in get_mount_point()
1807 if (arg_type
== FILENAME
|| arg_type
== DIRNAME
) {
1808 if (is_ext4(argv
[i
], dev_name
) < 0)
1810 if (realpath(argv
[i
], dir_name
) == NULL
) {
1811 perror("Couldn't get full path");
1812 PRINT_FILE_NAME(argv
[i
]);
1817 if (current_uid
== ROOT_UID
) {
1818 /* Get super block info */
1819 ret
= ext2fs_open(dev_name
, 0, 0, block_size
,
1820 unix_io_manager
, &fs
);
1822 if (mode_flag
& DETAIL
) {
1823 perror("Can't get super block info");
1824 PRINT_FILE_NAME(argv
[i
]);
1829 blocks_per_group
= fs
->super
->s_blocks_per_group
;
1830 feature_incompat
= fs
->super
->s_feature_incompat
;
1831 log_groups_per_flex
= fs
->super
->s_log_groups_per_flex
;
1838 if (!(mode_flag
& STATISTIC
))
1839 printf("ext4 defragmentation "
1840 "for directory(%s)\n", argv
[i
]);
1842 int mount_dir_len
= 0;
1843 mount_dir_len
= strnlen(lost_found_dir
, PATH_MAX
);
1845 strncat(lost_found_dir
, "/lost+found",
1846 PATH_MAX
- strnlen(lost_found_dir
, PATH_MAX
));
1848 /* Not the case("e4defrag mount_piont_dir") */
1849 if (dir_name
[mount_dir_len
] != '\0') {
1851 * "e4defrag mount_piont_dir/lost+found"
1852 * or "e4defrag mount_piont_dir/lost+found/"
1854 if (strncmp(lost_found_dir
, dir_name
,
1855 strnlen(lost_found_dir
,
1857 (dir_name
[strnlen(lost_found_dir
,
1858 PATH_MAX
)] == '\0' ||
1859 dir_name
[strnlen(lost_found_dir
,
1860 PATH_MAX
)] == '/')) {
1861 PRINT_ERR_MSG(NGMSG_LOST_FOUND
);
1862 PRINT_FILE_NAME(argv
[i
]);
1866 /* "e4defrag mount_piont_dir/else_dir" */
1867 memset(lost_found_dir
, 0, PATH_MAX
+ 1);
1870 if (arg_type
== DEVNAME
) {
1871 strncpy(lost_found_dir
, dir_name
,
1872 strnlen(dir_name
, PATH_MAX
));
1873 strncat(lost_found_dir
, "/lost+found/",
1874 PATH_MAX
- strnlen(lost_found_dir
,
1878 nftw64(dir_name
, calc_entry_counts
, FTW_OPEN_FD
, flags
);
1880 if (mode_flag
& STATISTIC
) {
1881 if (mode_flag
& DETAIL
)
1882 printf("%-40s%10s/%-10s%9s\n",
1883 "<File>", "now", "best", "size/ext");
1885 if (!(mode_flag
& DETAIL
) &&
1886 current_uid
!= ROOT_UID
) {
1892 nftw64(dir_name
, file_statistic
,
1893 FTW_OPEN_FD
, flags
);
1895 if (succeed_cnt
!= 0 &&
1896 current_uid
== ROOT_UID
) {
1897 if (mode_flag
& DETAIL
)
1899 printf("%-40s%10s/%-10s%9s\n",
1900 "<Fragmented files>", "now",
1901 "best", "size/ext");
1902 for (j
= 0; j
< SHOW_FRAG_FILES
; j
++) {
1903 if (strlen(frag_rank
[j
].
1905 printf("%d. %s\n%50d/"
1908 frag_rank
[j
].msg_buffer
,
1909 frag_rank
[j
].now_count
,
1910 frag_rank
[j
].best_count
,
1913 } else if (strlen(frag_rank
[j
].
1915 printf("%d. %-37s%10d/"
1918 frag_rank
[j
].msg_buffer
,
1919 frag_rank
[j
].now_count
,
1920 frag_rank
[j
].best_count
,
1929 /* File tree walk */
1930 nftw64(dir_name
, file_defrag
, FTW_OPEN_FD
, flags
);
1931 printf("\n\tSuccess:\t\t\t[ %u/%u ]\n", succeed_cnt
,
1933 printf("\tFailure:\t\t\t[ %u/%u ]\n",
1934 total_count
- succeed_cnt
, total_count
);
1935 if (mode_flag
& DETAIL
) {
1936 printf("\tTotal extents:\t\t\t%4d->%d\n",
1937 extents_before_defrag
,
1938 extents_after_defrag
);
1939 printf("\tFragmented percentage:\t\t"
1940 "%3llu%%->%llu%%\n",
1941 !regular_count
? 0 :
1942 ((unsigned long long)
1943 frag_files_before_defrag
* 100) /
1945 !regular_count
? 0 :
1946 ((unsigned long long)
1947 frag_files_after_defrag
* 100) /
1954 strncat(lost_found_dir
, "/lost+found/",
1955 PATH_MAX
- strnlen(lost_found_dir
,
1957 if (strncmp(lost_found_dir
, dir_name
,
1958 strnlen(lost_found_dir
,
1960 PRINT_ERR_MSG(NGMSG_LOST_FOUND
);
1961 PRINT_FILE_NAME(argv
[i
]);
1965 if (mode_flag
& STATISTIC
) {
1966 file_statistic(argv
[i
], &buf
, FTW_F
, NULL
);
1969 printf("ext4 defragmentation for %s\n",
1971 /* Defrag single file process */
1972 file_defrag(argv
[i
], &buf
, FTW_F
, NULL
);
1973 if (succeed_cnt
!= 0)
1974 printf(" Success:\t\t\t[1/1]\n");
1976 printf(" Success:\t\t\t[0/1]\n");
1981 if (succeed_cnt
!= 0)
1983 if (mode_flag
& STATISTIC
) {
1984 if (current_uid
!= ROOT_UID
) {
1990 if (mode_flag
& DETAIL
)
1993 if (arg_type
== DEVNAME
)
1994 printf(" In this device(%s), "
1995 "none can be defragmented.\n", argv
[i
]);
1996 else if (arg_type
== DIRNAME
)
1997 printf(" In this directory(%s), "
1998 "none can be defragmented.\n", argv
[i
]);
2000 printf(" This file(%s) "
2001 "can't be defragmented.\n", argv
[i
]);
2003 float files_ratio
= 0.0;
2005 __u64 size_per_ext
= files_block_count
*
2006 (buf
.st_blksize
/ 1024) /
2007 extents_before_defrag
;
2008 files_ratio
= (float)(extents_before_defrag
-
2009 extents_after_defrag
) *
2010 100 / files_block_count
;
2011 score
= CALC_SCORE(files_ratio
);
2012 printf("\n Total/best extents\t\t\t\t%d/%d\n"
2013 " Average size per extent"
2015 " Fragmentation score\t\t\t\t%.0f\n",
2016 extents_before_defrag
,
2017 extents_after_defrag
,
2018 size_per_ext
, score
);
2019 printf(" [0-30 no problem:"
2020 " 31-55 a little bit fragmented:"
2021 " 56- needs defrag]\n");
2023 if (arg_type
== DEVNAME
)
2024 printf(" This device (%s) ", argv
[i
]);
2025 else if (arg_type
== DIRNAME
)
2026 printf(" This directory (%s) ",
2029 printf(" This file (%s) ", argv
[i
]);
2031 if (score
> BOUND_SCORE
)
2032 printf("needs defragmentation.\n");
2034 printf("does not need "
2035 "defragmentation.\n");