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