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[thirdparty/e2fsprogs.git] / misc / e4defrag.c
1 /*
2 * e4defrag.c - ext4 filesystem defragmenter
3 *
4 * Copyright (C) 2009 NEC Software Tohoku, Ltd.
5 *
6 * Author: Akira Fujita <a-fujita@rs.jp.nec.com>
7 * Takashi Sato <t-sato@yk.jp.nec.com>
8 */
9
10 #ifndef _LARGEFILE_SOURCE
11 #define _LARGEFILE_SOURCE
12 #endif
13
14 #ifndef _LARGEFILE64_SOURCE
15 #define _LARGEFILE64_SOURCE
16 #endif
17
18 #ifndef _GNU_SOURCE
19 #define _GNU_SOURCE
20 #endif
21
22 #include <ctype.h>
23 #include <dirent.h>
24 #include <endian.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <ftw.h>
28 #include <limits.h>
29 #include <mntent.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <ext2fs/ext2_types.h>
35 #include <ext2fs/ext2fs.h>
36 #include <linux/fs.h>
37 #include <sys/ioctl.h>
38 #include <ext2fs/fiemap.h>
39 #include <sys/mman.h>
40 #include <sys/stat.h>
41 #include <sys/statfs.h>
42 #include <sys/syscall.h>
43 #include <sys/vfs.h>
44
45 /* A relatively new ioctl interface ... */
46 #ifndef EXT4_IOC_MOVE_EXT
47 #define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent)
48 #endif
49
50 /* Macro functions */
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 SECTOR_TO_BLOCK(sectors, blocksize) \
63 ((sectors) / ((blocksize) >> 9))
64 #define CALC_SCORE(ratio) \
65 ((ratio) > 10 ? (80 + 20 * (ratio) / 100) : (8 * (ratio)))
66 /* Wrap up the free function */
67 #define FREE(tmp) \
68 do { \
69 if ((tmp) != NULL) \
70 free(tmp); \
71 } while (0) \
72 /* Insert list2 after list1 */
73 #define insert(list1, list2) \
74 do { \
75 list2->next = list1->next; \
76 list1->next->prev = list2; \
77 list2->prev = list1; \
78 list1->next = list2; \
79 } while (0)
80
81 /* To delete unused warning */
82 #ifdef __GNUC__
83 #define EXT2FS_ATTR(x) __attribute__(x)
84 #else
85 #define EXT2FS_ATTR(x)
86 #endif
87
88 /* The mode of defrag */
89 #define DETAIL 0x01
90 #define STATISTIC 0x02
91
92 #define DEVNAME 0
93 #define DIRNAME 1
94 #define FILENAME 2
95
96 #define FTW_OPEN_FD 2000
97
98 #define FS_EXT4 "ext4"
99 #define ROOT_UID 0
100
101 #define BOUND_SCORE 55
102 #define SHOW_FRAG_FILES 5
103
104 /* Magic number for ext4 */
105 #define EXT4_SUPER_MAGIC 0xEF53
106
107 /* Definition of flex_bg */
108 #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
109
110 /* The following macro is used for ioctl FS_IOC_FIEMAP
111 * EXTENT_MAX_COUNT: the maximum number of extents for exchanging between
112 * kernel-space and user-space per ioctl
113 */
114 #define EXTENT_MAX_COUNT 512
115
116 /* The following macros are error message */
117 #define MSG_USAGE \
118 "Usage : e4defrag [-v] file...| directory...| device...\n\
119 : e4defrag -c file...| directory...| device...\n"
120
121 #define NGMSG_EXT4 "Filesystem is not ext4 filesystem"
122 #define NGMSG_FILE_EXTENT "Failed to get file extents"
123 #define NGMSG_FILE_INFO "Failed to get file information"
124 #define NGMSG_FILE_OPEN "Failed to open"
125 #define NGMSG_FILE_UNREG "File is not regular file"
126 #define NGMSG_LOST_FOUND "Can not process \"lost+found\""
127
128 /* Data type for filesystem-wide blocks number */
129 typedef unsigned long long ext4_fsblk_t;
130
131 struct fiemap_extent_data {
132 __u64 len; /* blocks count */
133 __u64 logical; /* start logical block number */
134 ext4_fsblk_t physical; /* start physical block number */
135 };
136
137 struct fiemap_extent_list {
138 struct fiemap_extent_list *prev;
139 struct fiemap_extent_list *next;
140 struct fiemap_extent_data data; /* extent belong to file */
141 };
142
143 struct fiemap_extent_group {
144 struct fiemap_extent_group *prev;
145 struct fiemap_extent_group *next;
146 __u64 len; /* length of this continuous region */
147 struct fiemap_extent_list *start; /* start ext */
148 struct fiemap_extent_list *end; /* end ext */
149 };
150
151 struct move_extent {
152 __s32 reserved; /* original file descriptor */
153 __u32 donor_fd; /* donor file descriptor */
154 __u64 orig_start; /* logical start offset in block for orig */
155 __u64 donor_start; /* logical start offset in block for donor */
156 __u64 len; /* block length to be moved */
157 __u64 moved_len; /* moved block length */
158 };
159
160 struct frag_statistic_ino {
161 int now_count; /* the file's extents count of before defrag */
162 int best_count; /* the best file's extents count */
163 float ratio; /* the ratio of fragmentation */
164 char msg_buffer[PATH_MAX + 1]; /* pathname of the file */
165 };
166
167 typedef __u16 __le16;
168 typedef __u32 __le32;
169 typedef __u64 __le64;
170
171 /*
172 * Structure of the super block
173 */
174 struct ext4_super_block {
175 /*00*/ __le32 s_inodes_count; /* Inodes count */
176 __le32 s_blocks_count_lo; /* Blocks count */
177 __le32 s_r_blocks_count_lo; /* Reserved blocks count */
178 __le32 s_free_blocks_count_lo; /* Free blocks count */
179 /*10*/ __le32 s_free_inodes_count; /* Free inodes count */
180 __le32 s_first_data_block; /* First Data Block */
181 __le32 s_log_block_size; /* Block size */
182 __le32 s_obso_log_frag_size; /* Obsoleted fragment size */
183 /*20*/ __le32 s_blocks_per_group; /* # Blocks per group */
184 __le32 s_obso_frags_per_group; /* Obsoleted fragments per group */
185 __le32 s_inodes_per_group; /* # Inodes per group */
186 __le32 s_mtime; /* Mount time */
187 /*30*/ __le32 s_wtime; /* Write time */
188 __le16 s_mnt_count; /* Mount count */
189 __le16 s_max_mnt_count; /* Maximal mount count */
190 __le16 s_magic; /* Magic signature */
191 __le16 s_state; /* File system state */
192 __le16 s_errors; /* Behaviour when detecting errors */
193 __le16 s_minor_rev_level; /* minor revision level */
194 /*40*/ __le32 s_lastcheck; /* time of last check */
195 __le32 s_checkinterval; /* max. time between checks */
196 __le32 s_creator_os; /* OS */
197 __le32 s_rev_level; /* Revision level */
198 /*50*/ __le16 s_def_resuid; /* Default uid for reserved blocks */
199 __le16 s_def_resgid; /* Default gid for reserved blocks */
200 /*
201 * These fields are for EXT4_DYNAMIC_REV superblocks only.
202 *
203 * Note: the difference between the compatible feature set and
204 * the incompatible feature set is that if there is a bit set
205 * in the incompatible feature set that the kernel doesn't
206 * know about, it should refuse to mount the filesystem.
207 *
208 * e2fsck's requirements are more strict; if it doesn't know
209 * about a feature in either the compatible or incompatible
210 * feature set, it must abort and not try to meddle with
211 * things it doesn't understand...
212 */
213 __le32 s_first_ino; /* First non-reserved inode */
214 __le16 s_inode_size; /* size of inode structure */
215 __le16 s_block_group_nr; /* block group # of this superblock */
216 __le32 s_feature_compat; /* compatible feature set */
217 /*60*/ __le32 s_feature_incompat; /* incompatible feature set */
218 __le32 s_feature_ro_compat; /* readonly-compatible feature set */
219 /*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
220 /*78*/ char s_volume_name[16]; /* volume name */
221 /*88*/ char s_last_mounted[64]; /* directory where last mounted */
222 /*C8*/ __le32 s_algorithm_usage_bitmap; /* For compression */
223 /*
224 * Performance hints. Directory preallocation should only
225 * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
226 */
227 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
228 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
229 __le16 s_reserved_gdt_blocks; /* Per group desc for online growth */
230 /*
231 * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
232 */
233 /*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
234 /*E0*/ __le32 s_journal_inum; /* inode number of journal file */
235 __le32 s_journal_dev; /* device number of journal file */
236 __le32 s_last_orphan; /* start of list of inodes to delete */
237 __le32 s_hash_seed[4]; /* HTREE hash seed */
238 __u8 s_def_hash_version; /* Default hash version to use */
239 __u8 s_reserved_char_pad;
240 __le16 s_desc_size; /* size of group descriptor */
241 /*100*/ __le32 s_default_mount_opts;
242 __le32 s_first_meta_bg; /* First metablock block group */
243 __le32 s_mkfs_time; /* When the filesystem was created */
244 __le32 s_jnl_blocks[17]; /* Backup of the journal inode */
245 /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
246 /*150*/ __le32 s_blocks_count_hi; /* Blocks count */
247 __le32 s_r_blocks_count_hi; /* Reserved blocks count */
248 __le32 s_free_blocks_count_hi; /* Free blocks count */
249 __le16 s_min_extra_isize; /* All inodes have at least # bytes */
250 __le16 s_want_extra_isize; /* New inodes should reserve # bytes */
251 __le32 s_flags; /* Miscellaneous flags */
252 __le16 s_raid_stride; /* RAID stride */
253 __le16 s_mmp_interval; /* # seconds to wait in MMP checking */
254 __le64 s_mmp_block; /* Block for multi-mount protection */
255 __le32 s_raid_stripe_width; /* blocks on all data disks (N*stride)*/
256 __u8 s_log_groups_per_flex; /* FLEX_BG group size */
257 __u8 s_reserved_char_pad2;
258 __le16 s_reserved_pad;
259 __u32 s_reserved[162]; /* Padding to the end of the block */
260 };
261
262 char lost_found_dir[PATH_MAX + 1];
263 int block_size;
264 int extents_before_defrag;
265 int extents_after_defrag;
266 int mode_flag;
267 unsigned int current_uid;
268 unsigned int defraged_file_count;
269 unsigned int frag_files_before_defrag;
270 unsigned int frag_files_after_defrag;
271 unsigned int regular_count;
272 unsigned int succeed_cnt;
273 unsigned int total_count;
274 __u8 log_groups_per_flex;
275 __le32 blocks_per_group;
276 __le32 feature_incompat;
277 ext4_fsblk_t files_block_count;
278 struct frag_statistic_ino frag_rank[SHOW_FRAG_FILES];
279
280
281 /* Local definitions of some syscalls glibc may not yet have */
282
283 #ifndef HAVE_POSIX_FADVISE
284 #warning Using locally defined posix_fadvise interface.
285
286 #ifndef __NR_fadvise64_64
287 #error Your kernel headers dont define __NR_fadvise64_64
288 #endif
289
290 /*
291 * fadvise() - Give advice about file access.
292 *
293 * @fd: defrag target file's descriptor.
294 * @offset: file offset.
295 * @len: area length.
296 * @advise: process flag.
297 */
298 static int posix_fadvise(int fd, loff_t offset, size_t len, int advise)
299 {
300 return syscall(__NR_fadvise64_64, fd, offset, len, advise);
301 }
302 #endif /* ! HAVE_FADVISE64_64 */
303
304 #ifndef HAVE_SYNC_FILE_RANGE
305 #warning Using locally defined sync_file_range interface.
306
307 #ifndef __NR_sync_file_range
308 #ifndef __NR_sync_file_range2 /* ppc */
309 #error Your kernel headers dont define __NR_sync_file_range
310 #endif
311 #endif
312
313 /*
314 * sync_file_range() - Sync file region.
315 *
316 * @fd: defrag target file's descriptor.
317 * @offset: file offset.
318 * @length: area length.
319 * @flag: process flag.
320 */
321 int sync_file_range(int fd, loff_t offset, loff_t length, unsigned int flag)
322 {
323 #ifdef __NR_sync_file_range
324 return syscall(__NR_sync_file_range, fd, offset, length, flag);
325 #else
326 return syscall(__NR_sync_file_range2, fd, flag, offset, length);
327 #endif
328 }
329 #endif /* ! HAVE_SYNC_FILE_RANGE */
330
331 #ifndef HAVE_FALLOCATE
332 #warning Using locally defined fallocate syscall interface.
333
334 #ifndef __NR_fallocate
335 #error Your kernel headers dont define __NR_fallocate
336 #endif
337
338 /*
339 * fallocate() - Manipulate file space.
340 *
341 * @fd: defrag target file's descriptor.
342 * @mode: process flag.
343 * @offset: file offset.
344 * @len: file size.
345 */
346 static int fallocate(int fd, int mode, loff_t offset, loff_t len)
347 {
348 return syscall(__NR_fallocate, fd, mode, offset, len);
349 }
350 #endif /* ! HAVE_FALLOCATE */
351
352 /*
353 * get_mount_point() - Get device's mount point.
354 *
355 * @devname: the device's name.
356 * @mount_point: the mount point.
357 * @dir_path_len: the length of directory.
358 */
359 static int get_mount_point(const char *devname, char *mount_point,
360 int dir_path_len)
361 {
362 /* Refer to /etc/mtab */
363 const char *mtab = MOUNTED;
364 FILE *fp = NULL;
365 struct mntent *mnt = NULL;
366
367 fp = setmntent(mtab, "r");
368 if (fp == NULL) {
369 perror("Couldn't access /etc/mtab");
370 return -1;
371 }
372
373 while ((mnt = getmntent(fp)) != NULL) {
374 if (strcmp(devname, mnt->mnt_fsname) != 0)
375 continue;
376
377 endmntent(fp);
378 if (strcmp(mnt->mnt_type, FS_EXT4) == 0) {
379 strncpy(mount_point, mnt->mnt_dir,
380 dir_path_len);
381 return 0;
382 }
383 PRINT_ERR_MSG(NGMSG_EXT4);
384 return -1;
385 }
386 endmntent(fp);
387 PRINT_ERR_MSG("Filesystem is not mounted");
388 return -1;
389 }
390
391 /*
392 * is_ext4() - Whether on an ext4 filesystem.
393 *
394 * @file: the file's name.
395 */
396 static int is_ext4(const char *file)
397 {
398 int maxlen = 0;
399 int len, ret;
400 FILE *fp = NULL;
401 char *mnt_type = NULL;
402 /* Refer to /etc/mtab */
403 const char *mtab = MOUNTED;
404 char file_path[PATH_MAX + 1];
405 struct mntent *mnt = NULL;
406 struct statfs64 fsbuf;
407
408 /* Get full path */
409 if (realpath(file, file_path) == NULL) {
410 perror("Couldn't get full path");
411 PRINT_FILE_NAME(file);
412 return -1;
413 }
414
415 if (statfs64(file_path, &fsbuf) < 0) {
416 perror("Failed to get filesystem information");
417 PRINT_FILE_NAME(file);
418 return -1;
419 }
420
421 if (fsbuf.f_type != EXT4_SUPER_MAGIC) {
422 PRINT_ERR_MSG(NGMSG_EXT4);
423 return -1;
424 }
425
426 fp = setmntent(mtab, "r");
427 if (fp == NULL) {
428 perror("Couldn't access /etc/mtab");
429 return -1;
430 }
431
432 while ((mnt = getmntent(fp)) != NULL) {
433 len = strlen(mnt->mnt_dir);
434 ret = memcmp(file_path, mnt->mnt_dir, len);
435 if (ret != 0)
436 continue;
437
438 if (maxlen >= len)
439 continue;
440
441 maxlen = len;
442
443 mnt_type = realloc(mnt_type, strlen(mnt->mnt_type) + 1);
444 if (mnt_type == NULL) {
445 endmntent(fp);
446 return -1;
447 }
448 memset(mnt_type, 0, strlen(mnt->mnt_type) + 1);
449 strncpy(mnt_type, mnt->mnt_type, strlen(mnt->mnt_type));
450 strncpy(lost_found_dir, mnt->mnt_dir, PATH_MAX);
451 }
452
453 endmntent(fp);
454 if (strcmp(mnt_type, FS_EXT4) == 0) {
455 FREE(mnt_type);
456 return 0;
457 } else {
458 FREE(mnt_type);
459 PRINT_ERR_MSG(NGMSG_EXT4);
460 return -1;
461 }
462 }
463
464 /*
465 * calc_entry_counts() - Calculate file counts.
466 *
467 * @file: file name.
468 * @buf: file info.
469 * @flag: file type.
470 * @ftwbuf: the pointer of a struct FTW.
471 */
472 static int calc_entry_counts(const char *file EXT2FS_ATTR((unused)),
473 const struct stat64 *buf, int flag EXT2FS_ATTR((unused)),
474 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
475 {
476 if (S_ISREG(buf->st_mode))
477 regular_count++;
478
479 total_count++;
480
481 return 0;
482 }
483
484 /*
485 * page_in_core() - Get information on whether pages are in core.
486 *
487 * @fd: defrag target file's descriptor.
488 * @defrag_data: data used for defrag.
489 * @vec: page state array.
490 * @page_num: page number.
491 */
492 static int page_in_core(int fd, struct move_extent defrag_data,
493 unsigned char **vec, unsigned int *page_num)
494 {
495 long pagesize = sysconf(_SC_PAGESIZE);
496 void *page = NULL;
497 loff_t offset, end_offset, length;
498
499 if (vec == NULL || *vec != NULL)
500 return -1;
501
502 /* In mmap, offset should be a multiple of the page size */
503 offset = (loff_t)defrag_data.orig_start * block_size;
504 length = (loff_t)defrag_data.len * block_size;
505 end_offset = offset + length;
506 /* Round the offset down to the nearest multiple of pagesize */
507 offset = (offset / pagesize) * pagesize;
508 length = end_offset - offset;
509
510 page = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, offset);
511 if (page == MAP_FAILED)
512 return -1;
513
514 *page_num = 0;
515 *page_num = (length + pagesize - 1) / pagesize;
516 *vec = (unsigned char *)calloc(*page_num, 1);
517 if (*vec == NULL)
518 return -1;
519
520 /* Get information on whether pages are in core */
521 if (mincore(page, (size_t)length, *vec) == -1 ||
522 munmap(page, length) == -1) {
523 FREE(*vec);
524 return -1;
525 }
526
527 return 0;
528 }
529
530 /*
531 * defrag_fadvise() - Predeclare an access pattern for file data.
532 *
533 * @fd: defrag target file's descriptor.
534 * @defrag_data: data used for defrag.
535 * @vec: page state array.
536 * @page_num: page number.
537 */
538 static int defrag_fadvise(int fd, struct move_extent defrag_data,
539 unsigned char *vec, unsigned int page_num)
540 {
541 int flag = 1;
542 long pagesize = sysconf(_SC_PAGESIZE);
543 int fadvise_flag = POSIX_FADV_DONTNEED;
544 int sync_flag = SYNC_FILE_RANGE_WAIT_BEFORE |
545 SYNC_FILE_RANGE_WRITE |
546 SYNC_FILE_RANGE_WAIT_AFTER;
547 unsigned int i;
548 loff_t offset;
549
550 offset = (loff_t)defrag_data.orig_start * block_size;
551 offset = (offset / pagesize) * pagesize;
552
553 /* Sync file for fadvise process */
554 if (sync_file_range(fd, offset,
555 (loff_t)pagesize * page_num, sync_flag) < 0)
556 return -1;
557
558 /* Try to release buffer cache which this process used,
559 * then other process can use the released buffer
560 */
561 for (i = 0; i < page_num; i++) {
562 if ((vec[i] & 0x1) == 0) {
563 offset += pagesize;
564 continue;
565 }
566 if (posix_fadvise(fd, offset, pagesize, fadvise_flag) < 0) {
567 if ((mode_flag & DETAIL) && flag) {
568 perror("\tFailed to fadvise");
569 flag = 0;
570 }
571 }
572 offset += pagesize;
573 }
574
575 return 0;
576 }
577
578 /*
579 * check_free_size() - Check if there's enough disk space.
580 *
581 * @fd: defrag target file's descriptor.
582 * @file: file name.
583 * @buf: the pointer of the struct stat64.
584 */
585 static int check_free_size(int fd, const char *file, const struct stat64 *buf)
586 {
587 ext4_fsblk_t blk_count;
588 ext4_fsblk_t free_blk_count;
589 struct statfs64 fsbuf;
590
591 if (fstatfs64(fd, &fsbuf) < 0) {
592 if (mode_flag & DETAIL) {
593 PRINT_FILE_NAME(file);
594 PRINT_ERR_MSG_WITH_ERRNO(
595 "Failed to get filesystem information");
596 }
597 return -1;
598 }
599
600 /* Target file size measured by filesystem IO blocksize */
601 blk_count = SECTOR_TO_BLOCK(buf->st_blocks, fsbuf.f_bsize);
602
603 /* Compute free space for root and normal user separately */
604 if (current_uid == ROOT_UID)
605 free_blk_count = fsbuf.f_bfree;
606 else
607 free_blk_count = fsbuf.f_bavail;
608
609 if (free_blk_count >= blk_count)
610 return 0;
611
612 return -ENOSPC;
613 }
614
615 /*
616 * file_frag_count() - Get file fragment count.
617 *
618 * @fd: defrag target file's descriptor.
619 */
620 static int file_frag_count(int fd)
621 {
622 int ret;
623 struct fiemap fiemap_buf;
624
625 /* When fm_extent_count is 0,
626 * ioctl just get file fragment count.
627 */
628 memset(&fiemap_buf, 0, sizeof(struct fiemap));
629 fiemap_buf.fm_start = 0;
630 fiemap_buf.fm_length = FIEMAP_MAX_OFFSET;
631 fiemap_buf.fm_flags |= FIEMAP_FLAG_SYNC;
632
633 ret = ioctl(fd, FS_IOC_FIEMAP, &fiemap_buf);
634 if (ret < 0)
635 return ret;
636
637 return fiemap_buf.fm_mapped_extents;
638 }
639
640 /*
641 * file_check() - Check file's attributes.
642 *
643 * @fd: defrag target file's descriptor.
644 * @buf: a pointer of the struct stat64.
645 * @file: the file's name.
646 * @extents: the file's extents.
647 */
648 static int file_check(int fd, const struct stat64 *buf, const char *file,
649 int extents)
650 {
651 int ret;
652 struct flock lock;
653
654 /* Write-lock check is more reliable */
655 lock.l_type = F_WRLCK;
656 lock.l_start = 0;
657 lock.l_whence = SEEK_SET;
658 lock.l_len = 0;
659
660 /* Free space */
661 ret = check_free_size(fd, file, buf);
662 if (ret < 0) {
663 if ((mode_flag & DETAIL) && ret == -ENOSPC) {
664 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
665 " extents: %d -> %d\n", defraged_file_count,
666 total_count, file, extents, extents);
667 IN_FTW_PRINT_ERR_MSG(
668 "Defrag size is larger than filesystem's free space");
669 }
670 return -1;
671 }
672
673 /* Access authority */
674 if (current_uid != ROOT_UID &&
675 buf->st_uid != current_uid) {
676 if (mode_flag & DETAIL) {
677 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
678 " extents: %d -> %d\n", defraged_file_count,
679 total_count, file, extents, extents);
680 IN_FTW_PRINT_ERR_MSG(
681 "File is not current user's file"
682 " or current user is not root");
683 }
684 return -1;
685 }
686
687 /* Lock status */
688 if (fcntl(fd, F_GETLK, &lock) < 0) {
689 if (mode_flag & DETAIL) {
690 PRINT_FILE_NAME(file);
691 PRINT_ERR_MSG_WITH_ERRNO(
692 "Failed to get lock information");
693 }
694 return -1;
695 } else if (lock.l_type != F_UNLCK) {
696 if (mode_flag & DETAIL) {
697 PRINT_FILE_NAME(file);
698 IN_FTW_PRINT_ERR_MSG("File has been locked");
699 }
700 return -1;
701 }
702
703 return 0;
704 }
705
706 /*
707 * insert_extent_by_logical() - Sequentially insert extent by logical.
708 *
709 * @ext_list_head: the head of logical extent list.
710 * @ext: the extent element which will be inserted.
711 */
712 static int insert_extent_by_logical(struct fiemap_extent_list **ext_list_head,
713 struct fiemap_extent_list *ext)
714 {
715 struct fiemap_extent_list *ext_list_tmp = *ext_list_head;
716
717 if (ext == NULL)
718 goto out;
719
720 /* First element */
721 if (*ext_list_head == NULL) {
722 (*ext_list_head) = ext;
723 (*ext_list_head)->prev = *ext_list_head;
724 (*ext_list_head)->next = *ext_list_head;
725 return 0;
726 }
727
728 if (ext->data.logical <= ext_list_tmp->data.logical) {
729 /* Insert before head */
730 if (ext_list_tmp->data.logical <
731 ext->data.logical + ext->data.len)
732 /* Overlap */
733 goto out;
734 /* Adjust head */
735 *ext_list_head = ext;
736 } else {
737 /* Insert into the middle or last of the list */
738 do {
739 if (ext->data.logical < ext_list_tmp->data.logical)
740 break;
741 ext_list_tmp = ext_list_tmp->next;
742 } while (ext_list_tmp != (*ext_list_head));
743 if (ext->data.logical <
744 ext_list_tmp->prev->data.logical +
745 ext_list_tmp->prev->data.len)
746 /* Overlap */
747 goto out;
748
749 if (ext_list_tmp != *ext_list_head &&
750 ext_list_tmp->data.logical <
751 ext->data.logical + ext->data.len)
752 /* Overlap */
753 goto out;
754 }
755 ext_list_tmp = ext_list_tmp->prev;
756 /* Insert "ext" after "ext_list_tmp" */
757 insert(ext_list_tmp, ext);
758 return 0;
759 out:
760 errno = EINVAL;
761 return -1;
762 }
763
764 /*
765 * insert_extent_by_physical() - Sequentially insert extent by physical.
766 *
767 * @ext_list_head: the head of physical extent list.
768 * @ext: the extent element which will be inserted.
769 */
770 static int insert_extent_by_physical(struct fiemap_extent_list **ext_list_head,
771 struct fiemap_extent_list *ext)
772 {
773 struct fiemap_extent_list *ext_list_tmp = *ext_list_head;
774
775 if (ext == NULL)
776 goto out;
777
778 /* First element */
779 if (*ext_list_head == NULL) {
780 (*ext_list_head) = ext;
781 (*ext_list_head)->prev = *ext_list_head;
782 (*ext_list_head)->next = *ext_list_head;
783 return 0;
784 }
785
786 if (ext->data.physical <= ext_list_tmp->data.physical) {
787 /* Insert before head */
788 if (ext_list_tmp->data.physical <
789 ext->data.physical + ext->data.len)
790 /* Overlap */
791 goto out;
792 /* Adjust head */
793 *ext_list_head = ext;
794 } else {
795 /* Insert into the middle or last of the list */
796 do {
797 if (ext->data.physical < ext_list_tmp->data.physical)
798 break;
799 ext_list_tmp = ext_list_tmp->next;
800 } while (ext_list_tmp != (*ext_list_head));
801 if (ext->data.physical <
802 ext_list_tmp->prev->data.physical +
803 ext_list_tmp->prev->data.len)
804 /* Overlap */
805 goto out;
806
807 if (ext_list_tmp != *ext_list_head &&
808 ext_list_tmp->data.physical <
809 ext->data.physical + ext->data.len)
810 /* Overlap */
811 goto out;
812 }
813 ext_list_tmp = ext_list_tmp->prev;
814 /* Insert "ext" after "ext_list_tmp" */
815 insert(ext_list_tmp, ext);
816 return 0;
817 out:
818 errno = EINVAL;
819 return -1;
820 }
821
822 /*
823 * insert_exts_group() - Insert a exts_group.
824 *
825 * @ext_group_head: the head of a exts_group list.
826 * @exts_group: the exts_group element which will be inserted.
827 */
828 static int insert_exts_group(struct fiemap_extent_group **ext_group_head,
829 struct fiemap_extent_group *exts_group)
830 {
831 struct fiemap_extent_group *ext_group_tmp = NULL;
832
833 if (exts_group == NULL) {
834 errno = EINVAL;
835 return -1;
836 }
837
838 /* Initialize list */
839 if (*ext_group_head == NULL) {
840 (*ext_group_head) = exts_group;
841 (*ext_group_head)->prev = *ext_group_head;
842 (*ext_group_head)->next = *ext_group_head;
843 return 0;
844 }
845
846 ext_group_tmp = (*ext_group_head)->prev;
847 insert(ext_group_tmp, exts_group);
848
849 return 0;
850 }
851
852 /*
853 * join_extents() - Find continuous region(exts_group).
854 *
855 * @ext_list_head: the head of the extent list.
856 * @ext_group_head: the head of the target exts_group list.
857 */
858 static int join_extents(struct fiemap_extent_list *ext_list_head,
859 struct fiemap_extent_group **ext_group_head)
860 {
861 __u64 len = ext_list_head->data.len;
862 struct fiemap_extent_list *ext_list_start = ext_list_head;
863 struct fiemap_extent_list *ext_list_tmp = ext_list_head->next;
864
865 do {
866 struct fiemap_extent_group *ext_group_tmp = NULL;
867
868 /* This extent and previous extent are not continuous,
869 * so, all previous extents are treated as an extent group.
870 */
871 if ((ext_list_tmp->prev->data.logical +
872 ext_list_tmp->prev->data.len)
873 != ext_list_tmp->data.logical) {
874 ext_group_tmp =
875 malloc(sizeof(struct fiemap_extent_group));
876 if (ext_group_tmp == NULL)
877 return -1;
878
879 memset(ext_group_tmp, 0,
880 sizeof(struct fiemap_extent_group));
881 ext_group_tmp->len = len;
882 ext_group_tmp->start = ext_list_start;
883 ext_group_tmp->end = ext_list_tmp->prev;
884
885 if (insert_exts_group(ext_group_head,
886 ext_group_tmp) < 0) {
887 FREE(ext_group_tmp);
888 return -1;
889 }
890 ext_list_start = ext_list_tmp;
891 len = ext_list_tmp->data.len;
892 ext_list_tmp = ext_list_tmp->next;
893 continue;
894 }
895
896 /* This extent and previous extent are continuous,
897 * so, they belong to the same extent group, and we check
898 * if the next extent belongs to the same extent group.
899 */
900 len += ext_list_tmp->data.len;
901 ext_list_tmp = ext_list_tmp->next;
902 } while (ext_list_tmp != ext_list_head->next);
903
904 return 0;
905 }
906
907 /*
908 * get_file_extents() - Get file's extent list.
909 *
910 * @fd: defrag target file's descriptor.
911 * @ext_list_head: the head of the extent list.
912 */
913 static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
914 {
915 __u32 i;
916 int ret;
917 int ext_buf_size, fie_buf_size;
918 __u64 pos = 0;
919 struct fiemap *fiemap_buf = NULL;
920 struct fiemap_extent *ext_buf = NULL;
921 struct fiemap_extent_list *ext_list = NULL;
922
923 /* Convert units, in bytes.
924 * Be careful : now, physical block number in extent is 48bit,
925 * and the maximum blocksize for ext4 is 4K(12bit),
926 * so there is no overflow, but in future it may be changed.
927 */
928
929 /* Alloc space for fiemap */
930 ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
931 fie_buf_size = sizeof(struct fiemap) + ext_buf_size;
932
933 fiemap_buf = malloc(fie_buf_size);
934 if (fiemap_buf == NULL)
935 return -1;
936
937 ext_buf = fiemap_buf->fm_extents;
938 memset(fiemap_buf, 0, fie_buf_size);
939 fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
940 fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
941 fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;
942
943 do {
944 fiemap_buf->fm_start = pos;
945 memset(ext_buf, 0, ext_buf_size);
946 ret = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
947 if (ret < 0)
948 goto out;
949 for (i = 0; i < fiemap_buf->fm_mapped_extents; i++) {
950 ext_list = NULL;
951 ext_list = malloc(sizeof(struct fiemap_extent_list));
952 if (ext_list == NULL)
953 goto out;
954
955 ext_list->data.physical = ext_buf[i].fe_physical
956 / block_size;
957 ext_list->data.logical = ext_buf[i].fe_logical
958 / block_size;
959 ext_list->data.len = ext_buf[i].fe_length
960 / block_size;
961
962 ret = insert_extent_by_physical(
963 ext_list_head, ext_list);
964 if (ret < 0) {
965 FREE(ext_list);
966 goto out;
967 }
968 }
969 /* Record file's logical offset this time */
970 pos = ext_buf[EXTENT_MAX_COUNT-1].fe_logical +
971 ext_buf[EXTENT_MAX_COUNT-1].fe_length;
972 /*
973 * If fm_extents array has been filled and
974 * there are extents left, continue to cycle.
975 */
976 } while (fiemap_buf->fm_mapped_extents
977 == EXTENT_MAX_COUNT &&
978 !(ext_buf[EXTENT_MAX_COUNT-1].fe_flags
979 & FIEMAP_EXTENT_LAST));
980
981 FREE(fiemap_buf);
982 return 0;
983 out:
984 FREE(fiemap_buf);
985 return -1;
986 }
987
988 /*
989 * get_logical_count() - Get the file logical extents count.
990 *
991 * @logical_list_head: the head of the logical extent list.
992 */
993 static int get_logical_count(struct fiemap_extent_list *logical_list_head)
994 {
995 int ret = 0;
996 struct fiemap_extent_list *ext_list_tmp = logical_list_head;
997
998 do {
999 ret++;
1000 ext_list_tmp = ext_list_tmp->next;
1001 } while (ext_list_tmp != logical_list_head);
1002
1003 return ret;
1004 }
1005
1006 /*
1007 * get_physical_count() - Get the file physical extents count.
1008 *
1009 * @physical_list_head: the head of the physical extent list.
1010 */
1011 static int get_physical_count(struct fiemap_extent_list *physical_list_head)
1012 {
1013 int ret = 0;
1014 struct fiemap_extent_list *ext_list_tmp = physical_list_head;
1015
1016 do {
1017 if ((ext_list_tmp->data.physical + ext_list_tmp->data.len)
1018 != ext_list_tmp->next->data.physical) {
1019 /* This extent and next extent are not continuous. */
1020 ret++;
1021 }
1022
1023 ext_list_tmp = ext_list_tmp->next;
1024 } while (ext_list_tmp != physical_list_head);
1025
1026 return ret;
1027 }
1028
1029 /*
1030 * change_physical_to_logical() - Change list from physical to logical.
1031 *
1032 * @physical_list_head: the head of physical extent list.
1033 * @logical_list_head: the head of logical extent list.
1034 */
1035 static int change_physical_to_logical(
1036 struct fiemap_extent_list **physical_list_head,
1037 struct fiemap_extent_list **logical_list_head)
1038 {
1039 int ret;
1040 struct fiemap_extent_list *ext_list_tmp = *physical_list_head;
1041 struct fiemap_extent_list *ext_list_next = ext_list_tmp->next;
1042
1043 while (1) {
1044 if (ext_list_tmp == ext_list_next) {
1045 ret = insert_extent_by_logical(
1046 logical_list_head, ext_list_tmp);
1047 if (ret < 0)
1048 return -1;
1049
1050 *physical_list_head = NULL;
1051 break;
1052 }
1053
1054 ext_list_tmp->prev->next = ext_list_tmp->next;
1055 ext_list_tmp->next->prev = ext_list_tmp->prev;
1056 *physical_list_head = ext_list_next;
1057
1058 ret = insert_extent_by_logical(
1059 logical_list_head, ext_list_tmp);
1060 if (ret < 0) {
1061 FREE(ext_list_tmp);
1062 return -1;
1063 }
1064 ext_list_tmp = ext_list_next;
1065 ext_list_next = ext_list_next->next;
1066 }
1067
1068 return 0;
1069 }
1070
1071 /*
1072 * free_ext() - Free the extent list.
1073 *
1074 * @ext_list_head: the extent list head of which will be free.
1075 */
1076 static void free_ext(struct fiemap_extent_list *ext_list_head)
1077 {
1078 struct fiemap_extent_list *ext_list_tmp = NULL;
1079
1080 if (ext_list_head == NULL)
1081 return;
1082
1083 while (ext_list_head->next != ext_list_head) {
1084 ext_list_tmp = ext_list_head;
1085 ext_list_head->prev->next = ext_list_head->next;
1086 ext_list_head->next->prev = ext_list_head->prev;
1087 ext_list_head = ext_list_head->next;
1088 free(ext_list_tmp);
1089 }
1090 free(ext_list_head);
1091 }
1092
1093 /*
1094 * free_exts_group() - Free the exts_group.
1095 *
1096 * @*ext_group_head: the exts_group list head which will be free.
1097 */
1098 static void free_exts_group(struct fiemap_extent_group *ext_group_head)
1099 {
1100 struct fiemap_extent_group *ext_group_tmp = NULL;
1101
1102 if (ext_group_head == NULL)
1103 return;
1104
1105 while (ext_group_head->next != ext_group_head) {
1106 ext_group_tmp = ext_group_head;
1107 ext_group_head->prev->next = ext_group_head->next;
1108 ext_group_head->next->prev = ext_group_head->prev;
1109 ext_group_head = ext_group_head->next;
1110 free(ext_group_tmp);
1111 }
1112 free(ext_group_head);
1113 }
1114
1115 /*
1116 * get_superblock_info() - Get superblock info by the file name.
1117 *
1118 * @file: the file's name.
1119 * @sb: the pointer of the struct ext4_super_block.
1120 */
1121 static int get_superblock_info(const char *file, struct ext4_super_block *sb)
1122 {
1123 /* Refer to /etc/mtab */
1124 const char *mtab = MOUNTED;
1125 FILE *fp = NULL;
1126
1127 int fd = -1;
1128 int ret;
1129 size_t maxlen = 0;
1130 size_t len;
1131 char dev_name[PATH_MAX + 1];
1132 struct mntent *mnt = NULL;
1133
1134 fp = setmntent(mtab, "r");
1135 if (fp == NULL)
1136 return -1;
1137
1138 while ((mnt = getmntent(fp)) != NULL) {
1139 len = strlen(mnt->mnt_dir);
1140 ret = memcmp(file, mnt->mnt_dir, len);
1141 if (ret != 0)
1142 continue;
1143
1144 if (len < maxlen)
1145 continue;
1146
1147 maxlen = len;
1148
1149 memset(dev_name, 0, PATH_MAX + 1);
1150 strncpy(dev_name, mnt->mnt_fsname,
1151 strnlen(mnt->mnt_fsname, PATH_MAX));
1152 }
1153
1154 fd = open64(dev_name, O_RDONLY);
1155 if (fd < 0) {
1156 ret = -1;
1157 goto out;
1158 }
1159
1160 /* Set offset to read superblock */
1161 ret = lseek64(fd, SUPERBLOCK_OFFSET, SEEK_SET);
1162 if (ret < 0)
1163 goto out;
1164
1165 ret = read(fd, sb, sizeof(struct ext4_super_block));
1166 if (ret < 0)
1167 goto out;
1168
1169 out:
1170 if (fd != -1)
1171 close(fd);
1172 endmntent(fp);
1173 return ret;
1174 }
1175
1176 /*
1177 * get_best_count() - Get the file best extents count.
1178 *
1179 * @block_count: the file's physical block count.
1180 */
1181 static int get_best_count(ext4_fsblk_t block_count)
1182 {
1183 int ret;
1184 unsigned int flex_bg_num;
1185
1186 /* Calcuate best extents count */
1187 if (feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
1188 flex_bg_num = 1 << log_groups_per_flex;
1189 ret = ((block_count - 1) /
1190 ((ext4_fsblk_t)blocks_per_group *
1191 flex_bg_num)) + 1;
1192 } else
1193 ret = ((block_count - 1) / blocks_per_group) + 1;
1194
1195 return ret;
1196 }
1197
1198
1199 /*
1200 * file_statistic() - Get statistic info of the file's fragments.
1201 *
1202 * @file: the file's name.
1203 * @buf: the pointer of the struct stat64.
1204 * @flag: file type.
1205 * @ftwbuf: the pointer of a struct FTW.
1206 */
1207 static int file_statistic(const char *file, const struct stat64 *buf,
1208 int flag EXT2FS_ATTR((unused)),
1209 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1210 {
1211 int fd;
1212 int ret;
1213 int now_ext_count, best_ext_count = 0, physical_ext_count;
1214 int i, j;
1215 float ratio = 0.0;
1216 ext4_fsblk_t blk_count = 0;
1217 char msg_buffer[PATH_MAX + 24];
1218 struct fiemap_extent_list *physical_list_head = NULL;
1219 struct fiemap_extent_list *logical_list_head = NULL;
1220
1221 defraged_file_count++;
1222
1223 if (mode_flag & DETAIL) {
1224 if (total_count == 1 && regular_count == 1)
1225 printf("<File>\n");
1226 else {
1227 printf("[%u/%u]", defraged_file_count, total_count);
1228 fflush(stdout);
1229 }
1230 }
1231 if (lost_found_dir[0] != '\0' &&
1232 !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1233 if (mode_flag & DETAIL) {
1234 PRINT_FILE_NAME(file);
1235 STATISTIC_ERR_MSG(NGMSG_LOST_FOUND);
1236 }
1237 return 0;
1238 }
1239
1240 if (!S_ISREG(buf->st_mode)) {
1241 if (mode_flag & DETAIL) {
1242 PRINT_FILE_NAME(file);
1243 STATISTIC_ERR_MSG(NGMSG_FILE_UNREG);
1244 }
1245 return 0;
1246 }
1247
1248 /* Access authority */
1249 if (current_uid != ROOT_UID &&
1250 buf->st_uid != current_uid) {
1251 if (mode_flag & DETAIL) {
1252 PRINT_FILE_NAME(file);
1253 STATISTIC_ERR_MSG(
1254 "File is not current user's file"
1255 " or current user is not root");
1256 }
1257 return 0;
1258 }
1259
1260 /* Empty file */
1261 if (buf->st_size == 0) {
1262 if (mode_flag & DETAIL) {
1263 PRINT_FILE_NAME(file);
1264 STATISTIC_ERR_MSG("File size is 0");
1265 }
1266 return 0;
1267 }
1268
1269 /* Has no blocks */
1270 if (buf->st_blocks == 0) {
1271 if (mode_flag & DETAIL) {
1272 PRINT_FILE_NAME(file);
1273 STATISTIC_ERR_MSG("File has no blocks");
1274 }
1275 return 0;
1276 }
1277
1278 fd = open64(file, O_RDONLY);
1279 if (fd < 0) {
1280 if (mode_flag & DETAIL) {
1281 PRINT_FILE_NAME(file);
1282 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1283 }
1284 return 0;
1285 }
1286
1287 /* Get file's physical extents */
1288 ret = get_file_extents(fd, &physical_list_head);
1289 if (ret < 0) {
1290 if (mode_flag & DETAIL) {
1291 PRINT_FILE_NAME(file);
1292 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1293 }
1294 goto out;
1295 }
1296
1297 /* Get the count of file's continuous physical region */
1298 physical_ext_count = get_physical_count(physical_list_head);
1299
1300 /* Change list from physical to logical */
1301 ret = change_physical_to_logical(&physical_list_head,
1302 &logical_list_head);
1303 if (ret < 0) {
1304 if (mode_flag & DETAIL) {
1305 PRINT_FILE_NAME(file);
1306 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1307 }
1308 goto out;
1309 }
1310
1311 /* Count file fragments before defrag */
1312 now_ext_count = get_logical_count(logical_list_head);
1313
1314 if (current_uid == ROOT_UID) {
1315 /* Calculate fragment ratio */
1316 blk_count =
1317 SECTOR_TO_BLOCK(buf->st_blocks, block_size);
1318
1319 best_ext_count = get_best_count(blk_count);
1320
1321 ratio = (float)(physical_ext_count - best_ext_count) * 100 /
1322 blk_count;
1323
1324 extents_before_defrag += now_ext_count;
1325 extents_after_defrag += best_ext_count;
1326 files_block_count += blk_count;
1327 }
1328
1329 if (total_count == 1 && regular_count == 1) {
1330 /* File only */
1331 if (mode_flag & DETAIL) {
1332 int count = 0;
1333 struct fiemap_extent_list *ext_list_tmp =
1334 logical_list_head;
1335
1336 /* Print extents info */
1337 do {
1338 count++;
1339 printf("[ext %d]:\tstart %llu:\tlogical "
1340 "%llu:\tlen %llu\n", count,
1341 ext_list_tmp->data.physical,
1342 ext_list_tmp->data.logical,
1343 ext_list_tmp->data.len);
1344 ext_list_tmp = ext_list_tmp->next;
1345 } while (ext_list_tmp != logical_list_head);
1346
1347 } else {
1348 printf("%-40s%10s/%-10s%9s\n",
1349 "<File>", "now", "best", "ratio");
1350 if (current_uid == ROOT_UID) {
1351 if (strlen(file) > 40)
1352 printf("%s\n%50d/%-10d%8.2f%%\n",
1353 file, now_ext_count,
1354 best_ext_count, ratio);
1355 else
1356 printf("%-40s%10d/%-10d%8.2f%%\n",
1357 file, now_ext_count,
1358 best_ext_count, ratio);
1359 } else {
1360 if (strlen(file) > 40)
1361 printf("%s\n%50d/%-10s%7s\n",
1362 file, now_ext_count,
1363 "-", "-");
1364 else
1365 printf("%-40s%10d/%-10s%7s\n",
1366 file, now_ext_count,
1367 "-", "-");
1368 }
1369 }
1370 succeed_cnt++;
1371 goto out;
1372 }
1373
1374 if (mode_flag & DETAIL) {
1375 /* Print statistic info */
1376 sprintf(msg_buffer, "[%u/%u]%s",
1377 defraged_file_count, total_count, file);
1378 if (current_uid == ROOT_UID) {
1379 if (strlen(msg_buffer) > 40)
1380 printf("\033[79;0H\033[K%s\n"
1381 "%50d/%-10d%8.2f%%\n",
1382 msg_buffer, now_ext_count,
1383 best_ext_count, ratio);
1384 else
1385 printf("\033[79;0H\033[K%-40s"
1386 "%10d/%-10d%8.2f%%\n",
1387 msg_buffer, now_ext_count,
1388 best_ext_count, ratio);
1389 } else {
1390 if (strlen(msg_buffer) > 40)
1391 printf("\033[79;0H\033[K%s\n%50d/%-10s%7s\n",
1392 msg_buffer, now_ext_count,
1393 "-", "-");
1394 else
1395 printf("\033[79;0H\033[K%-40s%10d/%-10s%7s\n",
1396 msg_buffer, now_ext_count,
1397 "-", "-");
1398 }
1399 }
1400
1401 for (i = 0; i < SHOW_FRAG_FILES; i++) {
1402 if (ratio >= frag_rank[i].ratio) {
1403 for (j = SHOW_FRAG_FILES - 1; j > i; j--) {
1404 memcpy(&frag_rank[j], &frag_rank[j - 1],
1405 sizeof(struct frag_statistic_ino));
1406 }
1407 memset(&frag_rank[i], 0,
1408 sizeof(struct frag_statistic_ino));
1409 strncpy(frag_rank[i].msg_buffer, file,
1410 strnlen(file, PATH_MAX));
1411 frag_rank[i].now_count = now_ext_count;
1412 frag_rank[i].best_count = best_ext_count;
1413 frag_rank[i].ratio = ratio;
1414 break;
1415 }
1416 }
1417
1418 succeed_cnt++;
1419
1420 out:
1421 close(fd);
1422 free_ext(physical_list_head);
1423 free_ext(logical_list_head);
1424 return 0;
1425 }
1426
1427 /*
1428 * print_progress - Print defrag progress
1429 *
1430 * @file: file name.
1431 * @start: logical offset for defrag target file
1432 * @file_size: defrag target filesize
1433 */
1434 static void print_progress(const char *file, loff_t start, loff_t file_size)
1435 {
1436 int percent = (start * 100) / file_size;
1437 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1438 defraged_file_count, total_count, file, min(percent, 100));
1439 fflush(stdout);
1440
1441 return;
1442 }
1443
1444 /*
1445 * call_defrag() - Execute the defrag program.
1446 *
1447 * @fd: target file descriptor.
1448 * @donor_fd: donor file descriptor.
1449 * @file: target file name.
1450 * @buf: pointer of the struct stat64.
1451 * @ext_list_head: head of the extent list.
1452 */
1453 static int call_defrag(int fd, int donor_fd, const char *file,
1454 const struct stat64 *buf, struct fiemap_extent_list *ext_list_head)
1455 {
1456 loff_t start = 0;
1457 unsigned int page_num;
1458 unsigned char *vec = NULL;
1459 int defraged_ret = 0;
1460 int ret;
1461 struct move_extent move_data;
1462 struct fiemap_extent_list *ext_list_tmp = NULL;
1463
1464 memset(&move_data, 0, sizeof(struct move_extent));
1465 move_data.donor_fd = donor_fd;
1466
1467 /* Print defrag progress */
1468 print_progress(file, start, buf->st_size);
1469
1470 ext_list_tmp = ext_list_head;
1471 do {
1472 move_data.orig_start = ext_list_tmp->data.logical;
1473 /* Logical offset of orig and donor should be same */
1474 move_data.donor_start = move_data.orig_start;
1475 move_data.len = ext_list_tmp->data.len;
1476 move_data.moved_len = 0;
1477
1478 ret = page_in_core(fd, move_data, &vec, &page_num);
1479 if (ret < 0) {
1480 if (mode_flag & DETAIL) {
1481 printf("\n");
1482 PRINT_ERR_MSG_WITH_ERRNO(
1483 "Failed to get file map");
1484 } else {
1485 printf("\t[ NG ]\n");
1486 }
1487 return -1;
1488 }
1489
1490 /* EXT4_IOC_MOVE_EXT */
1491 defraged_ret =
1492 ioctl(fd, EXT4_IOC_MOVE_EXT, &move_data);
1493
1494 /* Free pages */
1495 ret = defrag_fadvise(fd, move_data, vec, page_num);
1496 if (vec) {
1497 free(vec);
1498 vec = NULL;
1499 }
1500 if (ret < 0) {
1501 if (mode_flag & DETAIL) {
1502 printf("\n");
1503 PRINT_ERR_MSG_WITH_ERRNO(
1504 "Failed to free page");
1505 } else {
1506 printf("\t[ NG ]\n");
1507 }
1508 return -1;
1509 }
1510
1511 if (defraged_ret < 0) {
1512 if (mode_flag & DETAIL) {
1513 printf("\n");
1514 PRINT_ERR_MSG_WITH_ERRNO(
1515 "Failed to defrag");
1516 } else {
1517 printf("\t[ NG ]\n");
1518 }
1519 return -1;
1520 }
1521 /* Adjust logical offset for next ioctl */
1522 move_data.orig_start += move_data.moved_len;
1523 move_data.donor_start = move_data.orig_start;
1524
1525 start = move_data.orig_start * buf->st_blksize;
1526
1527 /* Print defrag progress */
1528 print_progress(file, start, buf->st_size);
1529
1530 /* End of file */
1531 if (start >= buf->st_size)
1532 break;
1533
1534 ext_list_tmp = ext_list_tmp->next;
1535 } while (ext_list_tmp != ext_list_head);
1536
1537 return 0;
1538 }
1539
1540 /*
1541 * file_defrag() - Check file attributes and call ioctl to defrag.
1542 *
1543 * @file: the file's name.
1544 * @buf: the pointer of the struct stat64.
1545 * @flag: file type.
1546 * @ftwbuf: the pointer of a struct FTW.
1547 */
1548 static int file_defrag(const char *file, const struct stat64 *buf,
1549 int flag EXT2FS_ATTR((unused)),
1550 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1551 {
1552 int fd;
1553 int donor_fd = -1;
1554 int ret;
1555 int best;
1556 int file_frags_start, file_frags_end;
1557 int orig_physical_cnt, donor_physical_cnt = 0;
1558 char tmp_inode_name[PATH_MAX + 8];
1559 struct fiemap_extent_list *orig_list_physical = NULL;
1560 struct fiemap_extent_list *orig_list_logical = NULL;
1561 struct fiemap_extent_list *donor_list_physical = NULL;
1562 struct fiemap_extent_list *donor_list_logical = NULL;
1563 struct fiemap_extent_group *orig_group_head = NULL;
1564 struct fiemap_extent_group *orig_group_tmp = NULL;
1565
1566 defraged_file_count++;
1567
1568 if (mode_flag & DETAIL) {
1569 printf("[%u/%u]", defraged_file_count, total_count);
1570 fflush(stdout);
1571 }
1572
1573 if (lost_found_dir[0] != '\0' &&
1574 !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1575 if (mode_flag & DETAIL) {
1576 PRINT_FILE_NAME(file);
1577 IN_FTW_PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1578 }
1579 return 0;
1580 }
1581
1582 if (!S_ISREG(buf->st_mode)) {
1583 if (mode_flag & DETAIL) {
1584 PRINT_FILE_NAME(file);
1585 IN_FTW_PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1586 }
1587 return 0;
1588 }
1589
1590 /* Empty file */
1591 if (buf->st_size == 0) {
1592 if (mode_flag & DETAIL) {
1593 PRINT_FILE_NAME(file);
1594 IN_FTW_PRINT_ERR_MSG("File size is 0");
1595 }
1596 return 0;
1597 }
1598
1599 /* Has no blocks */
1600 if (buf->st_blocks == 0) {
1601 if (mode_flag & DETAIL) {
1602 PRINT_FILE_NAME(file);
1603 STATISTIC_ERR_MSG("File has no blocks");
1604 }
1605 return 0;
1606 }
1607
1608 fd = open64(file, O_RDONLY);
1609 if (fd < 0) {
1610 if (mode_flag & DETAIL) {
1611 PRINT_FILE_NAME(file);
1612 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1613 }
1614 return 0;
1615 }
1616
1617 /* Get file's extents */
1618 ret = get_file_extents(fd, &orig_list_physical);
1619 if (ret < 0) {
1620 if (mode_flag & DETAIL) {
1621 PRINT_FILE_NAME(file);
1622 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1623 }
1624 goto out;
1625 }
1626
1627 /* Get the count of file's continuous physical region */
1628 orig_physical_cnt = get_physical_count(orig_list_physical);
1629
1630 /* Change list from physical to logical */
1631 ret = change_physical_to_logical(&orig_list_physical,
1632 &orig_list_logical);
1633 if (ret < 0) {
1634 if (mode_flag & DETAIL) {
1635 PRINT_FILE_NAME(file);
1636 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1637 }
1638 goto out;
1639 }
1640
1641 /* Count file fragments before defrag */
1642 file_frags_start = get_logical_count(orig_list_logical);
1643
1644 if (file_check(fd, buf, file, file_frags_start) < 0)
1645 goto out;
1646
1647 if (fsync(fd) < 0) {
1648 if (mode_flag & DETAIL) {
1649 PRINT_FILE_NAME(file);
1650 PRINT_ERR_MSG_WITH_ERRNO("Failed to sync(fsync)");
1651 }
1652 goto out;
1653 }
1654
1655 if (current_uid == ROOT_UID)
1656 best =
1657 get_best_count(SECTOR_TO_BLOCK(buf->st_blocks, block_size));
1658 else
1659 best = 1;
1660
1661 if (file_frags_start <= best)
1662 goto check_improvement;
1663
1664 /* Combine extents to group */
1665 ret = join_extents(orig_list_logical, &orig_group_head);
1666 if (ret < 0) {
1667 if (mode_flag & DETAIL) {
1668 PRINT_FILE_NAME(file);
1669 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1670 }
1671 goto out;
1672 }
1673
1674 /* Create donor inode */
1675 memset(tmp_inode_name, 0, PATH_MAX + 8);
1676 sprintf(tmp_inode_name, "%.*s.defrag",
1677 (int)strnlen(file, PATH_MAX), file);
1678 donor_fd = open64(tmp_inode_name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR);
1679 if (donor_fd < 0) {
1680 if (mode_flag & DETAIL) {
1681 PRINT_FILE_NAME(file);
1682 if (errno == EEXIST)
1683 PRINT_ERR_MSG_WITH_ERRNO(
1684 "File is being defraged by other program");
1685 else
1686 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1687 }
1688 goto out;
1689 }
1690
1691 /* Unlink donor inode */
1692 ret = unlink(tmp_inode_name);
1693 if (ret < 0) {
1694 if (mode_flag & DETAIL) {
1695 PRINT_FILE_NAME(file);
1696 PRINT_ERR_MSG_WITH_ERRNO("Failed to unlink");
1697 }
1698 goto out;
1699 }
1700
1701 /* Allocate space for donor inode */
1702 orig_group_tmp = orig_group_head;
1703 do {
1704 ret = fallocate(donor_fd, 0,
1705 (loff_t)orig_group_tmp->start->data.logical * block_size,
1706 (loff_t)orig_group_tmp->len * block_size);
1707 if (ret < 0) {
1708 if (mode_flag & DETAIL) {
1709 PRINT_FILE_NAME(file);
1710 PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
1711 }
1712 goto out;
1713 }
1714
1715 orig_group_tmp = orig_group_tmp->next;
1716 } while (orig_group_tmp != orig_group_head);
1717
1718 /* Get donor inode's extents */
1719 ret = get_file_extents(donor_fd, &donor_list_physical);
1720 if (ret < 0) {
1721 if (mode_flag & DETAIL) {
1722 PRINT_FILE_NAME(file);
1723 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1724 }
1725 goto out;
1726 }
1727
1728 /* Calcuate donor inode's continuous physical region */
1729 donor_physical_cnt = get_physical_count(donor_list_physical);
1730
1731 /* Change donor extent list from physical to logical */
1732 ret = change_physical_to_logical(&donor_list_physical,
1733 &donor_list_logical);
1734 if (ret < 0) {
1735 if (mode_flag & DETAIL) {
1736 PRINT_FILE_NAME(file);
1737 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1738 }
1739 goto out;
1740 }
1741
1742 check_improvement:
1743 if (mode_flag & DETAIL) {
1744 if (file_frags_start != 1)
1745 frag_files_before_defrag++;
1746
1747 extents_before_defrag += file_frags_start;
1748 }
1749
1750 if (file_frags_start <= best ||
1751 orig_physical_cnt <= donor_physical_cnt) {
1752 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1753 defraged_file_count, total_count, file, 100);
1754 if (mode_flag & DETAIL)
1755 printf(" extents: %d -> %d",
1756 file_frags_start, file_frags_start);
1757
1758 printf("\t[ OK ]\n");
1759 succeed_cnt++;
1760
1761 if (file_frags_start != 1)
1762 frag_files_after_defrag++;
1763
1764 extents_after_defrag += file_frags_start;
1765 goto out;
1766 }
1767
1768 /* Defrag the file */
1769 ret = call_defrag(fd, donor_fd, file, buf, donor_list_logical);
1770
1771 /* Count file fragments after defrag and print extents info */
1772 if (mode_flag & DETAIL) {
1773 file_frags_end = file_frag_count(fd);
1774 if (file_frags_end < 0) {
1775 printf("\n");
1776 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_INFO);
1777 goto out;
1778 }
1779
1780 if (file_frags_end != 1)
1781 frag_files_after_defrag++;
1782
1783 extents_after_defrag += file_frags_end;
1784
1785 if (ret < 0)
1786 goto out;
1787
1788 printf(" extents: %d -> %d",
1789 file_frags_start, file_frags_end);
1790 fflush(stdout);
1791 }
1792
1793 if (ret < 0)
1794 goto out;
1795
1796 printf("\t[ OK ]\n");
1797 fflush(stdout);
1798 succeed_cnt++;
1799
1800 out:
1801 close(fd);
1802 if (donor_fd != -1)
1803 close(donor_fd);
1804 free_ext(orig_list_physical);
1805 free_ext(orig_list_logical);
1806 free_ext(donor_list_physical);
1807 free_exts_group(orig_group_head);
1808 return 0;
1809 }
1810
1811 /*
1812 * main() - Ext4 online defrag.
1813 *
1814 * @argc: the number of parameter.
1815 * @argv[]: the pointer array of parameter.
1816 */
1817 int main(int argc, char *argv[])
1818 {
1819 int opt;
1820 int i, j;
1821 int flags = FTW_PHYS | FTW_MOUNT;
1822 int arg_type = -1;
1823 int success_flag = 0;
1824 char dir_name[PATH_MAX + 1];
1825 struct stat64 buf;
1826 struct ext4_super_block sb;
1827
1828 /* Parse arguments */
1829 if (argc == 1)
1830 goto out;
1831
1832 while ((opt = getopt(argc, argv, "vc")) != EOF) {
1833 switch (opt) {
1834 case 'v':
1835 mode_flag |= DETAIL;
1836 break;
1837 case 'c':
1838 mode_flag |= STATISTIC;
1839 break;
1840 default:
1841 goto out;
1842 }
1843 }
1844
1845 if (argc == optind)
1846 goto out;
1847
1848 current_uid = getuid();
1849
1850 /* Main process */
1851 for (i = optind; i < argc; i++) {
1852 succeed_cnt = 0;
1853 regular_count = 0;
1854 total_count = 0;
1855 frag_files_before_defrag = 0;
1856 frag_files_after_defrag = 0;
1857 extents_before_defrag = 0;
1858 extents_after_defrag = 0;
1859 defraged_file_count = 0;
1860 files_block_count = 0;
1861 blocks_per_group = 0;
1862 feature_incompat = 0;
1863 log_groups_per_flex = 0;
1864
1865 memset(dir_name, 0, PATH_MAX + 1);
1866 memset(lost_found_dir, 0, PATH_MAX + 1);
1867 memset(frag_rank, 0,
1868 sizeof(struct frag_statistic_ino) * SHOW_FRAG_FILES);
1869
1870 if ((mode_flag & STATISTIC) && i > optind)
1871 printf("\n");
1872
1873 #if BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN
1874 PRINT_ERR_MSG("Endian's type is not big/little endian");
1875 PRINT_FILE_NAME(argv[i]);
1876 continue;
1877 #endif
1878
1879 if (lstat64(argv[i], &buf) < 0) {
1880 perror(NGMSG_FILE_INFO);
1881 PRINT_FILE_NAME(argv[i]);
1882 continue;
1883 }
1884
1885 if (S_ISBLK(buf.st_mode)) {
1886 /* Block device */
1887 if (get_mount_point(argv[i], dir_name, PATH_MAX) < 0)
1888 continue;
1889 if (lstat64(dir_name, &buf) < 0) {
1890 perror(NGMSG_FILE_INFO);
1891 PRINT_FILE_NAME(argv[i]);
1892 continue;
1893 }
1894 arg_type = DEVNAME;
1895 if (!(mode_flag & STATISTIC))
1896 printf("ext4 defragmentation for device(%s)\n",
1897 argv[i]);
1898 } else if (S_ISDIR(buf.st_mode)) {
1899 /* Directory */
1900 if (access(argv[i], R_OK) < 0) {
1901 perror(argv[i]);
1902 continue;
1903 }
1904 arg_type = DIRNAME;
1905 strncpy(dir_name, argv[i], strnlen(argv[i], PATH_MAX));
1906 } else if (S_ISREG(buf.st_mode)) {
1907 /* Regular file */
1908 arg_type = FILENAME;
1909 } else {
1910 /* Irregular file */
1911 PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1912 PRINT_FILE_NAME(argv[i]);
1913 continue;
1914 }
1915
1916 /* Set blocksize */
1917 block_size = buf.st_blksize;
1918
1919 /* For device case,
1920 * filesystem type checked in get_mount_point()
1921 */
1922 if (arg_type == FILENAME || arg_type == DIRNAME) {
1923 if (is_ext4(argv[i]) < 0)
1924 continue;
1925 if (realpath(argv[i], dir_name) == NULL) {
1926 perror("Couldn't get full path");
1927 PRINT_FILE_NAME(argv[i]);
1928 continue;
1929 }
1930 }
1931
1932 if (current_uid == ROOT_UID) {
1933 /* Get super block info */
1934 memset(&sb, 0, sizeof(struct ext4_super_block));
1935 if (get_superblock_info(dir_name, &sb) < 0) {
1936 if (mode_flag & DETAIL) {
1937 perror("Can't get super block info");
1938 PRINT_FILE_NAME(argv[i]);
1939 }
1940 continue;
1941 }
1942
1943 blocks_per_group = ext2fs_swab32(sb.s_blocks_per_group);
1944 feature_incompat = ext2fs_swab32(sb.s_feature_incompat);
1945 log_groups_per_flex = sb.s_log_groups_per_flex;
1946 }
1947
1948 switch (arg_type) {
1949 case DIRNAME:
1950 if (!(mode_flag & STATISTIC))
1951 printf("ext4 defragmentation "
1952 "for directory(%s)\n", argv[i]);
1953
1954 int mount_dir_len = 0;
1955 mount_dir_len = strnlen(lost_found_dir, PATH_MAX);
1956
1957 strncat(lost_found_dir, "/lost+found",
1958 PATH_MAX - strnlen(lost_found_dir, PATH_MAX));
1959
1960 /* Not the case("e4defrag mount_piont_dir") */
1961 if (dir_name[mount_dir_len] != '\0') {
1962 /*
1963 * "e4defrag mount_piont_dir/lost+found"
1964 * or "e4defrag mount_piont_dir/lost+found/"
1965 */
1966 if (strncmp(lost_found_dir, dir_name,
1967 strnlen(lost_found_dir,
1968 PATH_MAX)) == 0 &&
1969 (dir_name[strnlen(lost_found_dir,
1970 PATH_MAX)] == '\0' ||
1971 dir_name[strnlen(lost_found_dir,
1972 PATH_MAX)] == '/')) {
1973 PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1974 PRINT_FILE_NAME(argv[i]);
1975 continue;
1976 }
1977
1978 /* "e4defrag mount_piont_dir/else_dir" */
1979 memset(lost_found_dir, 0, PATH_MAX + 1);
1980 }
1981 case DEVNAME:
1982 if (arg_type == DEVNAME) {
1983 strncpy(lost_found_dir, dir_name,
1984 strnlen(dir_name, PATH_MAX));
1985 strncat(lost_found_dir, "/lost+found/",
1986 PATH_MAX - strnlen(lost_found_dir,
1987 PATH_MAX));
1988 }
1989
1990 nftw64(dir_name, calc_entry_counts, FTW_OPEN_FD, flags);
1991
1992 if (mode_flag & STATISTIC) {
1993 if (mode_flag & DETAIL)
1994 printf("%-40s%10s/%-10s%9s\n",
1995 "<File>", "now", "best", "ratio");
1996
1997 if (!(mode_flag & DETAIL) &&
1998 current_uid != ROOT_UID) {
1999 printf(" Done.\n");
2000 continue;
2001 }
2002
2003 nftw64(dir_name, file_statistic,
2004 FTW_OPEN_FD, flags);
2005
2006 if (succeed_cnt != 0 &&
2007 current_uid == ROOT_UID) {
2008 if (mode_flag & DETAIL)
2009 printf("\n");
2010 printf("%-40s%10s/%-10s%9s\n",
2011 "<Fragmented files>", "now",
2012 "best", "ratio");
2013 for (j = 0; j < SHOW_FRAG_FILES; j++) {
2014 if (strlen(frag_rank[j].
2015 msg_buffer) > 37) {
2016 printf("%d. %s\n%50d/"
2017 "%-10d%8.2f%%\n", j + 1,
2018 frag_rank[j].msg_buffer,
2019 frag_rank[j].now_count,
2020 frag_rank[j].best_count,
2021 frag_rank[j].ratio);
2022 } else if (strlen(frag_rank[j].
2023 msg_buffer) > 0) {
2024 printf("%d. %-37s%10d/"
2025 "%-10d%8.2f%%\n", j + 1,
2026 frag_rank[j].msg_buffer,
2027 frag_rank[j].now_count,
2028 frag_rank[j].best_count,
2029 frag_rank[j].ratio);
2030 } else
2031 break;
2032 }
2033 }
2034 break;
2035 }
2036 /* File tree walk */
2037 nftw64(dir_name, file_defrag, FTW_OPEN_FD, flags);
2038 printf("\n\tSuccess:\t\t\t[ %u/%u ]\n", succeed_cnt,
2039 total_count);
2040 printf("\tFailure:\t\t\t[ %u/%u ]\n",
2041 total_count - succeed_cnt, total_count);
2042 if (mode_flag & DETAIL) {
2043 printf("\tTotal extents:\t\t\t%4d->%d\n",
2044 extents_before_defrag,
2045 extents_after_defrag);
2046 printf("\tFragmented percentage:\t\t"
2047 "%3llu%%->%llu%%\n",
2048 !regular_count ? 0 :
2049 ((unsigned long long)
2050 frag_files_before_defrag * 100) /
2051 regular_count,
2052 !regular_count ? 0 :
2053 ((unsigned long long)
2054 frag_files_after_defrag * 100) /
2055 regular_count);
2056 }
2057 break;
2058 case FILENAME:
2059 total_count = 1;
2060 regular_count = 1;
2061 strncat(lost_found_dir, "/lost+found/",
2062 PATH_MAX - strnlen(lost_found_dir,
2063 PATH_MAX));
2064 if (strncmp(lost_found_dir, dir_name,
2065 strnlen(lost_found_dir,
2066 PATH_MAX)) == 0) {
2067 PRINT_ERR_MSG(NGMSG_LOST_FOUND);
2068 PRINT_FILE_NAME(argv[i]);
2069 continue;
2070 }
2071
2072 if (mode_flag & STATISTIC) {
2073 file_statistic(argv[i], &buf, FTW_F, NULL);
2074 break;
2075 } else
2076 printf("ext4 defragmentation for %s\n",
2077 argv[i]);
2078 /* Defrag single file process */
2079 file_defrag(argv[i], &buf, FTW_F, NULL);
2080 if (succeed_cnt != 0)
2081 printf(" Success:\t\t\t[1/1]\n");
2082 else
2083 printf(" Success:\t\t\t[0/1]\n");
2084
2085 break;
2086 }
2087
2088 if (succeed_cnt != 0)
2089 success_flag = 1;
2090 if (mode_flag & STATISTIC) {
2091 if (current_uid != ROOT_UID) {
2092 printf(" Done.\n");
2093 continue;
2094 }
2095
2096 if (!succeed_cnt) {
2097 if (mode_flag & DETAIL)
2098 printf("\n");
2099
2100 if (arg_type == DEVNAME)
2101 printf(" In this device(%s), "
2102 "none can be defragmented.\n", argv[i]);
2103 else if (arg_type == DIRNAME)
2104 printf(" In this directory(%s), "
2105 "none can be defragmented.\n", argv[i]);
2106 else
2107 printf(" This file(%s) "
2108 "can't be defragmented.\n", argv[i]);
2109 } else {
2110 float files_ratio = 0.0;
2111 float score = 0.0;
2112 files_ratio = (float)(extents_before_defrag -
2113 extents_after_defrag) *
2114 100 / files_block_count;
2115 score = CALC_SCORE(files_ratio);
2116 printf("\n Total/best extents\t\t\t\t%d/%d\n"
2117 " Fragmentation ratio\t\t\t\t%.2f%%\n"
2118 " Fragmentation score\t\t\t\t%.2f\n",
2119 extents_before_defrag,
2120 extents_after_defrag,
2121 files_ratio, score);
2122 printf(" [0-30 no problem:"
2123 " 31-55 a little bit fragmented:"
2124 " 55- needs defrag]\n");
2125
2126 if (arg_type == DEVNAME)
2127 printf(" This device(%s) ", argv[i]);
2128 else if (arg_type == DIRNAME)
2129 printf(" This directory(%s) ", argv[i]);
2130 else
2131 printf(" This file(%s) ", argv[i]);
2132
2133 if (score > BOUND_SCORE)
2134 printf("needs defragmentation.\n");
2135 else
2136 printf("does not need "
2137 "defragmentation.\n");
2138 }
2139 printf(" Done.\n");
2140 }
2141
2142 }
2143
2144 if (success_flag)
2145 return 0;
2146
2147 exit(1);
2148
2149 out:
2150 printf(MSG_USAGE);
2151 exit(1);
2152 }
2153
Unnamed repository; edit this file 'description' to name the repository.