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e4defrag: skip "rootfs" entry when checking for ext4 filesystem
[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 if (mnt->mnt_fsname[0] != '/')
434 continue;
435 len = strlen(mnt->mnt_dir);
436 ret = memcmp(file_path, mnt->mnt_dir, len);
437 if (ret != 0)
438 continue;
439
440 if (maxlen >= len)
441 continue;
442
443 maxlen = len;
444
445 mnt_type = realloc(mnt_type, strlen(mnt->mnt_type) + 1);
446 if (mnt_type == NULL) {
447 endmntent(fp);
448 return -1;
449 }
450 memset(mnt_type, 0, strlen(mnt->mnt_type) + 1);
451 strncpy(mnt_type, mnt->mnt_type, strlen(mnt->mnt_type));
452 strncpy(lost_found_dir, mnt->mnt_dir, PATH_MAX);
453 }
454
455 endmntent(fp);
456 if (strcmp(mnt_type, FS_EXT4) == 0) {
457 FREE(mnt_type);
458 return 0;
459 } else {
460 FREE(mnt_type);
461 PRINT_ERR_MSG(NGMSG_EXT4);
462 return -1;
463 }
464 }
465
466 /*
467 * calc_entry_counts() - Calculate file counts.
468 *
469 * @file: file name.
470 * @buf: file info.
471 * @flag: file type.
472 * @ftwbuf: the pointer of a struct FTW.
473 */
474 static int calc_entry_counts(const char *file EXT2FS_ATTR((unused)),
475 const struct stat64 *buf, int flag EXT2FS_ATTR((unused)),
476 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
477 {
478 if (S_ISREG(buf->st_mode))
479 regular_count++;
480
481 total_count++;
482
483 return 0;
484 }
485
486 /*
487 * page_in_core() - Get information on whether pages are in core.
488 *
489 * @fd: defrag target file's descriptor.
490 * @defrag_data: data used for defrag.
491 * @vec: page state array.
492 * @page_num: page number.
493 */
494 static int page_in_core(int fd, struct move_extent defrag_data,
495 unsigned char **vec, unsigned int *page_num)
496 {
497 long pagesize = sysconf(_SC_PAGESIZE);
498 void *page = NULL;
499 loff_t offset, end_offset, length;
500
501 if (vec == NULL || *vec != NULL)
502 return -1;
503
504 /* In mmap, offset should be a multiple of the page size */
505 offset = (loff_t)defrag_data.orig_start * block_size;
506 length = (loff_t)defrag_data.len * block_size;
507 end_offset = offset + length;
508 /* Round the offset down to the nearest multiple of pagesize */
509 offset = (offset / pagesize) * pagesize;
510 length = end_offset - offset;
511
512 page = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, offset);
513 if (page == MAP_FAILED)
514 return -1;
515
516 *page_num = 0;
517 *page_num = (length + pagesize - 1) / pagesize;
518 *vec = (unsigned char *)calloc(*page_num, 1);
519 if (*vec == NULL)
520 return -1;
521
522 /* Get information on whether pages are in core */
523 if (mincore(page, (size_t)length, *vec) == -1 ||
524 munmap(page, length) == -1) {
525 FREE(*vec);
526 return -1;
527 }
528
529 return 0;
530 }
531
532 /*
533 * defrag_fadvise() - Predeclare an access pattern for file data.
534 *
535 * @fd: defrag target file's descriptor.
536 * @defrag_data: data used for defrag.
537 * @vec: page state array.
538 * @page_num: page number.
539 */
540 static int defrag_fadvise(int fd, struct move_extent defrag_data,
541 unsigned char *vec, unsigned int page_num)
542 {
543 int flag = 1;
544 long pagesize = sysconf(_SC_PAGESIZE);
545 int fadvise_flag = POSIX_FADV_DONTNEED;
546 int sync_flag = SYNC_FILE_RANGE_WAIT_BEFORE |
547 SYNC_FILE_RANGE_WRITE |
548 SYNC_FILE_RANGE_WAIT_AFTER;
549 unsigned int i;
550 loff_t offset;
551
552 offset = (loff_t)defrag_data.orig_start * block_size;
553 offset = (offset / pagesize) * pagesize;
554
555 /* Sync file for fadvise process */
556 if (sync_file_range(fd, offset,
557 (loff_t)pagesize * page_num, sync_flag) < 0)
558 return -1;
559
560 /* Try to release buffer cache which this process used,
561 * then other process can use the released buffer
562 */
563 for (i = 0; i < page_num; i++) {
564 if ((vec[i] & 0x1) == 0) {
565 offset += pagesize;
566 continue;
567 }
568 if (posix_fadvise(fd, offset, pagesize, fadvise_flag) < 0) {
569 if ((mode_flag & DETAIL) && flag) {
570 perror("\tFailed to fadvise");
571 flag = 0;
572 }
573 }
574 offset += pagesize;
575 }
576
577 return 0;
578 }
579
580 /*
581 * check_free_size() - Check if there's enough disk space.
582 *
583 * @fd: defrag target file's descriptor.
584 * @file: file name.
585 * @buf: the pointer of the struct stat64.
586 */
587 static int check_free_size(int fd, const char *file, const struct stat64 *buf)
588 {
589 ext4_fsblk_t blk_count;
590 ext4_fsblk_t free_blk_count;
591 struct statfs64 fsbuf;
592
593 if (fstatfs64(fd, &fsbuf) < 0) {
594 if (mode_flag & DETAIL) {
595 PRINT_FILE_NAME(file);
596 PRINT_ERR_MSG_WITH_ERRNO(
597 "Failed to get filesystem information");
598 }
599 return -1;
600 }
601
602 /* Target file size measured by filesystem IO blocksize */
603 blk_count = SECTOR_TO_BLOCK(buf->st_blocks, fsbuf.f_bsize);
604
605 /* Compute free space for root and normal user separately */
606 if (current_uid == ROOT_UID)
607 free_blk_count = fsbuf.f_bfree;
608 else
609 free_blk_count = fsbuf.f_bavail;
610
611 if (free_blk_count >= blk_count)
612 return 0;
613
614 return -ENOSPC;
615 }
616
617 /*
618 * file_frag_count() - Get file fragment count.
619 *
620 * @fd: defrag target file's descriptor.
621 */
622 static int file_frag_count(int fd)
623 {
624 int ret;
625 struct fiemap fiemap_buf;
626
627 /* When fm_extent_count is 0,
628 * ioctl just get file fragment count.
629 */
630 memset(&fiemap_buf, 0, sizeof(struct fiemap));
631 fiemap_buf.fm_start = 0;
632 fiemap_buf.fm_length = FIEMAP_MAX_OFFSET;
633 fiemap_buf.fm_flags |= FIEMAP_FLAG_SYNC;
634
635 ret = ioctl(fd, FS_IOC_FIEMAP, &fiemap_buf);
636 if (ret < 0)
637 return ret;
638
639 return fiemap_buf.fm_mapped_extents;
640 }
641
642 /*
643 * file_check() - Check file's attributes.
644 *
645 * @fd: defrag target file's descriptor.
646 * @buf: a pointer of the struct stat64.
647 * @file: the file's name.
648 * @extents: the file's extents.
649 */
650 static int file_check(int fd, const struct stat64 *buf, const char *file,
651 int extents)
652 {
653 int ret;
654 struct flock lock;
655
656 /* Write-lock check is more reliable */
657 lock.l_type = F_WRLCK;
658 lock.l_start = 0;
659 lock.l_whence = SEEK_SET;
660 lock.l_len = 0;
661
662 /* Free space */
663 ret = check_free_size(fd, file, buf);
664 if (ret < 0) {
665 if ((mode_flag & DETAIL) && ret == -ENOSPC) {
666 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
667 " extents: %d -> %d\n", defraged_file_count,
668 total_count, file, extents, extents);
669 IN_FTW_PRINT_ERR_MSG(
670 "Defrag size is larger than filesystem's free space");
671 }
672 return -1;
673 }
674
675 /* Access authority */
676 if (current_uid != ROOT_UID &&
677 buf->st_uid != current_uid) {
678 if (mode_flag & DETAIL) {
679 printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
680 " extents: %d -> %d\n", defraged_file_count,
681 total_count, file, extents, extents);
682 IN_FTW_PRINT_ERR_MSG(
683 "File is not current user's file"
684 " or current user is not root");
685 }
686 return -1;
687 }
688
689 /* Lock status */
690 if (fcntl(fd, F_GETLK, &lock) < 0) {
691 if (mode_flag & DETAIL) {
692 PRINT_FILE_NAME(file);
693 PRINT_ERR_MSG_WITH_ERRNO(
694 "Failed to get lock information");
695 }
696 return -1;
697 } else if (lock.l_type != F_UNLCK) {
698 if (mode_flag & DETAIL) {
699 PRINT_FILE_NAME(file);
700 IN_FTW_PRINT_ERR_MSG("File has been locked");
701 }
702 return -1;
703 }
704
705 return 0;
706 }
707
708 /*
709 * insert_extent_by_logical() - Sequentially insert extent by logical.
710 *
711 * @ext_list_head: the head of logical extent list.
712 * @ext: the extent element which will be inserted.
713 */
714 static int insert_extent_by_logical(struct fiemap_extent_list **ext_list_head,
715 struct fiemap_extent_list *ext)
716 {
717 struct fiemap_extent_list *ext_list_tmp = *ext_list_head;
718
719 if (ext == NULL)
720 goto out;
721
722 /* First element */
723 if (*ext_list_head == NULL) {
724 (*ext_list_head) = ext;
725 (*ext_list_head)->prev = *ext_list_head;
726 (*ext_list_head)->next = *ext_list_head;
727 return 0;
728 }
729
730 if (ext->data.logical <= ext_list_tmp->data.logical) {
731 /* Insert before head */
732 if (ext_list_tmp->data.logical <
733 ext->data.logical + ext->data.len)
734 /* Overlap */
735 goto out;
736 /* Adjust head */
737 *ext_list_head = ext;
738 } else {
739 /* Insert into the middle or last of the list */
740 do {
741 if (ext->data.logical < ext_list_tmp->data.logical)
742 break;
743 ext_list_tmp = ext_list_tmp->next;
744 } while (ext_list_tmp != (*ext_list_head));
745 if (ext->data.logical <
746 ext_list_tmp->prev->data.logical +
747 ext_list_tmp->prev->data.len)
748 /* Overlap */
749 goto out;
750
751 if (ext_list_tmp != *ext_list_head &&
752 ext_list_tmp->data.logical <
753 ext->data.logical + ext->data.len)
754 /* Overlap */
755 goto out;
756 }
757 ext_list_tmp = ext_list_tmp->prev;
758 /* Insert "ext" after "ext_list_tmp" */
759 insert(ext_list_tmp, ext);
760 return 0;
761 out:
762 errno = EINVAL;
763 return -1;
764 }
765
766 /*
767 * insert_extent_by_physical() - Sequentially insert extent by physical.
768 *
769 * @ext_list_head: the head of physical extent list.
770 * @ext: the extent element which will be inserted.
771 */
772 static int insert_extent_by_physical(struct fiemap_extent_list **ext_list_head,
773 struct fiemap_extent_list *ext)
774 {
775 struct fiemap_extent_list *ext_list_tmp = *ext_list_head;
776
777 if (ext == NULL)
778 goto out;
779
780 /* First element */
781 if (*ext_list_head == NULL) {
782 (*ext_list_head) = ext;
783 (*ext_list_head)->prev = *ext_list_head;
784 (*ext_list_head)->next = *ext_list_head;
785 return 0;
786 }
787
788 if (ext->data.physical <= ext_list_tmp->data.physical) {
789 /* Insert before head */
790 if (ext_list_tmp->data.physical <
791 ext->data.physical + ext->data.len)
792 /* Overlap */
793 goto out;
794 /* Adjust head */
795 *ext_list_head = ext;
796 } else {
797 /* Insert into the middle or last of the list */
798 do {
799 if (ext->data.physical < ext_list_tmp->data.physical)
800 break;
801 ext_list_tmp = ext_list_tmp->next;
802 } while (ext_list_tmp != (*ext_list_head));
803 if (ext->data.physical <
804 ext_list_tmp->prev->data.physical +
805 ext_list_tmp->prev->data.len)
806 /* Overlap */
807 goto out;
808
809 if (ext_list_tmp != *ext_list_head &&
810 ext_list_tmp->data.physical <
811 ext->data.physical + ext->data.len)
812 /* Overlap */
813 goto out;
814 }
815 ext_list_tmp = ext_list_tmp->prev;
816 /* Insert "ext" after "ext_list_tmp" */
817 insert(ext_list_tmp, ext);
818 return 0;
819 out:
820 errno = EINVAL;
821 return -1;
822 }
823
824 /*
825 * insert_exts_group() - Insert a exts_group.
826 *
827 * @ext_group_head: the head of a exts_group list.
828 * @exts_group: the exts_group element which will be inserted.
829 */
830 static int insert_exts_group(struct fiemap_extent_group **ext_group_head,
831 struct fiemap_extent_group *exts_group)
832 {
833 struct fiemap_extent_group *ext_group_tmp = NULL;
834
835 if (exts_group == NULL) {
836 errno = EINVAL;
837 return -1;
838 }
839
840 /* Initialize list */
841 if (*ext_group_head == NULL) {
842 (*ext_group_head) = exts_group;
843 (*ext_group_head)->prev = *ext_group_head;
844 (*ext_group_head)->next = *ext_group_head;
845 return 0;
846 }
847
848 ext_group_tmp = (*ext_group_head)->prev;
849 insert(ext_group_tmp, exts_group);
850
851 return 0;
852 }
853
854 /*
855 * join_extents() - Find continuous region(exts_group).
856 *
857 * @ext_list_head: the head of the extent list.
858 * @ext_group_head: the head of the target exts_group list.
859 */
860 static int join_extents(struct fiemap_extent_list *ext_list_head,
861 struct fiemap_extent_group **ext_group_head)
862 {
863 __u64 len = ext_list_head->data.len;
864 struct fiemap_extent_list *ext_list_start = ext_list_head;
865 struct fiemap_extent_list *ext_list_tmp = ext_list_head->next;
866
867 do {
868 struct fiemap_extent_group *ext_group_tmp = NULL;
869
870 /* This extent and previous extent are not continuous,
871 * so, all previous extents are treated as an extent group.
872 */
873 if ((ext_list_tmp->prev->data.logical +
874 ext_list_tmp->prev->data.len)
875 != ext_list_tmp->data.logical) {
876 ext_group_tmp =
877 malloc(sizeof(struct fiemap_extent_group));
878 if (ext_group_tmp == NULL)
879 return -1;
880
881 memset(ext_group_tmp, 0,
882 sizeof(struct fiemap_extent_group));
883 ext_group_tmp->len = len;
884 ext_group_tmp->start = ext_list_start;
885 ext_group_tmp->end = ext_list_tmp->prev;
886
887 if (insert_exts_group(ext_group_head,
888 ext_group_tmp) < 0) {
889 FREE(ext_group_tmp);
890 return -1;
891 }
892 ext_list_start = ext_list_tmp;
893 len = ext_list_tmp->data.len;
894 ext_list_tmp = ext_list_tmp->next;
895 continue;
896 }
897
898 /* This extent and previous extent are continuous,
899 * so, they belong to the same extent group, and we check
900 * if the next extent belongs to the same extent group.
901 */
902 len += ext_list_tmp->data.len;
903 ext_list_tmp = ext_list_tmp->next;
904 } while (ext_list_tmp != ext_list_head->next);
905
906 return 0;
907 }
908
909 /*
910 * get_file_extents() - Get file's extent list.
911 *
912 * @fd: defrag target file's descriptor.
913 * @ext_list_head: the head of the extent list.
914 */
915 static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
916 {
917 __u32 i;
918 int ret;
919 int ext_buf_size, fie_buf_size;
920 __u64 pos = 0;
921 struct fiemap *fiemap_buf = NULL;
922 struct fiemap_extent *ext_buf = NULL;
923 struct fiemap_extent_list *ext_list = NULL;
924
925 /* Convert units, in bytes.
926 * Be careful : now, physical block number in extent is 48bit,
927 * and the maximum blocksize for ext4 is 4K(12bit),
928 * so there is no overflow, but in future it may be changed.
929 */
930
931 /* Alloc space for fiemap */
932 ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
933 fie_buf_size = sizeof(struct fiemap) + ext_buf_size;
934
935 fiemap_buf = malloc(fie_buf_size);
936 if (fiemap_buf == NULL)
937 return -1;
938
939 ext_buf = fiemap_buf->fm_extents;
940 memset(fiemap_buf, 0, fie_buf_size);
941 fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
942 fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
943 fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;
944
945 do {
946 fiemap_buf->fm_start = pos;
947 memset(ext_buf, 0, ext_buf_size);
948 ret = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
949 if (ret < 0)
950 goto out;
951 for (i = 0; i < fiemap_buf->fm_mapped_extents; i++) {
952 ext_list = NULL;
953 ext_list = malloc(sizeof(struct fiemap_extent_list));
954 if (ext_list == NULL)
955 goto out;
956
957 ext_list->data.physical = ext_buf[i].fe_physical
958 / block_size;
959 ext_list->data.logical = ext_buf[i].fe_logical
960 / block_size;
961 ext_list->data.len = ext_buf[i].fe_length
962 / block_size;
963
964 ret = insert_extent_by_physical(
965 ext_list_head, ext_list);
966 if (ret < 0) {
967 FREE(ext_list);
968 goto out;
969 }
970 }
971 /* Record file's logical offset this time */
972 pos = ext_buf[EXTENT_MAX_COUNT-1].fe_logical +
973 ext_buf[EXTENT_MAX_COUNT-1].fe_length;
974 /*
975 * If fm_extents array has been filled and
976 * there are extents left, continue to cycle.
977 */
978 } while (fiemap_buf->fm_mapped_extents
979 == EXTENT_MAX_COUNT &&
980 !(ext_buf[EXTENT_MAX_COUNT-1].fe_flags
981 & FIEMAP_EXTENT_LAST));
982
983 FREE(fiemap_buf);
984 return 0;
985 out:
986 FREE(fiemap_buf);
987 return -1;
988 }
989
990 /*
991 * get_logical_count() - Get the file logical extents count.
992 *
993 * @logical_list_head: the head of the logical extent list.
994 */
995 static int get_logical_count(struct fiemap_extent_list *logical_list_head)
996 {
997 int ret = 0;
998 struct fiemap_extent_list *ext_list_tmp = logical_list_head;
999
1000 do {
1001 ret++;
1002 ext_list_tmp = ext_list_tmp->next;
1003 } while (ext_list_tmp != logical_list_head);
1004
1005 return ret;
1006 }
1007
1008 /*
1009 * get_physical_count() - Get the file physical extents count.
1010 *
1011 * @physical_list_head: the head of the physical extent list.
1012 */
1013 static int get_physical_count(struct fiemap_extent_list *physical_list_head)
1014 {
1015 int ret = 0;
1016 struct fiemap_extent_list *ext_list_tmp = physical_list_head;
1017
1018 do {
1019 if ((ext_list_tmp->data.physical + ext_list_tmp->data.len)
1020 != ext_list_tmp->next->data.physical) {
1021 /* This extent and next extent are not continuous. */
1022 ret++;
1023 }
1024
1025 ext_list_tmp = ext_list_tmp->next;
1026 } while (ext_list_tmp != physical_list_head);
1027
1028 return ret;
1029 }
1030
1031 /*
1032 * change_physical_to_logical() - Change list from physical to logical.
1033 *
1034 * @physical_list_head: the head of physical extent list.
1035 * @logical_list_head: the head of logical extent list.
1036 */
1037 static int change_physical_to_logical(
1038 struct fiemap_extent_list **physical_list_head,
1039 struct fiemap_extent_list **logical_list_head)
1040 {
1041 int ret;
1042 struct fiemap_extent_list *ext_list_tmp = *physical_list_head;
1043 struct fiemap_extent_list *ext_list_next = ext_list_tmp->next;
1044
1045 while (1) {
1046 if (ext_list_tmp == ext_list_next) {
1047 ret = insert_extent_by_logical(
1048 logical_list_head, ext_list_tmp);
1049 if (ret < 0)
1050 return -1;
1051
1052 *physical_list_head = NULL;
1053 break;
1054 }
1055
1056 ext_list_tmp->prev->next = ext_list_tmp->next;
1057 ext_list_tmp->next->prev = ext_list_tmp->prev;
1058 *physical_list_head = ext_list_next;
1059
1060 ret = insert_extent_by_logical(
1061 logical_list_head, ext_list_tmp);
1062 if (ret < 0) {
1063 FREE(ext_list_tmp);
1064 return -1;
1065 }
1066 ext_list_tmp = ext_list_next;
1067 ext_list_next = ext_list_next->next;
1068 }
1069
1070 return 0;
1071 }
1072
1073 /*
1074 * free_ext() - Free the extent list.
1075 *
1076 * @ext_list_head: the extent list head of which will be free.
1077 */
1078 static void free_ext(struct fiemap_extent_list *ext_list_head)
1079 {
1080 struct fiemap_extent_list *ext_list_tmp = NULL;
1081
1082 if (ext_list_head == NULL)
1083 return;
1084
1085 while (ext_list_head->next != ext_list_head) {
1086 ext_list_tmp = ext_list_head;
1087 ext_list_head->prev->next = ext_list_head->next;
1088 ext_list_head->next->prev = ext_list_head->prev;
1089 ext_list_head = ext_list_head->next;
1090 free(ext_list_tmp);
1091 }
1092 free(ext_list_head);
1093 }
1094
1095 /*
1096 * free_exts_group() - Free the exts_group.
1097 *
1098 * @*ext_group_head: the exts_group list head which will be free.
1099 */
1100 static void free_exts_group(struct fiemap_extent_group *ext_group_head)
1101 {
1102 struct fiemap_extent_group *ext_group_tmp = NULL;
1103
1104 if (ext_group_head == NULL)
1105 return;
1106
1107 while (ext_group_head->next != ext_group_head) {
1108 ext_group_tmp = ext_group_head;
1109 ext_group_head->prev->next = ext_group_head->next;
1110 ext_group_head->next->prev = ext_group_head->prev;
1111 ext_group_head = ext_group_head->next;
1112 free(ext_group_tmp);
1113 }
1114 free(ext_group_head);
1115 }
1116
1117 /*
1118 * get_superblock_info() - Get superblock info by the file name.
1119 *
1120 * @file: the file's name.
1121 * @sb: the pointer of the struct ext4_super_block.
1122 */
1123 static int get_superblock_info(const char *file, struct ext4_super_block *sb)
1124 {
1125 /* Refer to /etc/mtab */
1126 const char *mtab = MOUNTED;
1127 FILE *fp = NULL;
1128
1129 int fd = -1;
1130 int ret;
1131 size_t maxlen = 0;
1132 size_t len;
1133 char dev_name[PATH_MAX + 1];
1134 struct mntent *mnt = NULL;
1135
1136 fp = setmntent(mtab, "r");
1137 if (fp == NULL)
1138 return -1;
1139
1140 while ((mnt = getmntent(fp)) != NULL) {
1141 len = strlen(mnt->mnt_dir);
1142 ret = memcmp(file, mnt->mnt_dir, len);
1143 if (ret != 0)
1144 continue;
1145
1146 if (len < maxlen)
1147 continue;
1148
1149 maxlen = len;
1150
1151 memset(dev_name, 0, PATH_MAX + 1);
1152 strncpy(dev_name, mnt->mnt_fsname,
1153 strnlen(mnt->mnt_fsname, PATH_MAX));
1154 }
1155
1156 fd = open64(dev_name, O_RDONLY);
1157 if (fd < 0) {
1158 ret = -1;
1159 goto out;
1160 }
1161
1162 /* Set offset to read superblock */
1163 ret = lseek64(fd, SUPERBLOCK_OFFSET, SEEK_SET);
1164 if (ret < 0)
1165 goto out;
1166
1167 ret = read(fd, sb, sizeof(struct ext4_super_block));
1168 if (ret < 0)
1169 goto out;
1170
1171 out:
1172 if (fd != -1)
1173 close(fd);
1174 endmntent(fp);
1175 return ret;
1176 }
1177
1178 /*
1179 * get_best_count() - Get the file best extents count.
1180 *
1181 * @block_count: the file's physical block count.
1182 */
1183 static int get_best_count(ext4_fsblk_t block_count)
1184 {
1185 int ret;
1186 unsigned int flex_bg_num;
1187
1188 /* Calcuate best extents count */
1189 if (feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
1190 flex_bg_num = 1 << log_groups_per_flex;
1191 ret = ((block_count - 1) /
1192 ((ext4_fsblk_t)blocks_per_group *
1193 flex_bg_num)) + 1;
1194 } else
1195 ret = ((block_count - 1) / blocks_per_group) + 1;
1196
1197 return ret;
1198 }
1199
1200
1201 /*
1202 * file_statistic() - Get statistic info of the file's fragments.
1203 *
1204 * @file: the file's name.
1205 * @buf: the pointer of the struct stat64.
1206 * @flag: file type.
1207 * @ftwbuf: the pointer of a struct FTW.
1208 */
1209 static int file_statistic(const char *file, const struct stat64 *buf,
1210 int flag EXT2FS_ATTR((unused)),
1211 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1212 {
1213 int fd;
1214 int ret;
1215 int now_ext_count, best_ext_count = 0, physical_ext_count;
1216 int i, j;
1217 float ratio = 0.0;
1218 ext4_fsblk_t blk_count = 0;
1219 char msg_buffer[PATH_MAX + 24];
1220 struct fiemap_extent_list *physical_list_head = NULL;
1221 struct fiemap_extent_list *logical_list_head = NULL;
1222
1223 defraged_file_count++;
1224
1225 if (mode_flag & DETAIL) {
1226 if (total_count == 1 && regular_count == 1)
1227 printf("<File>\n");
1228 else {
1229 printf("[%u/%u]", defraged_file_count, total_count);
1230 fflush(stdout);
1231 }
1232 }
1233 if (lost_found_dir[0] != '\0' &&
1234 !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1235 if (mode_flag & DETAIL) {
1236 PRINT_FILE_NAME(file);
1237 STATISTIC_ERR_MSG(NGMSG_LOST_FOUND);
1238 }
1239 return 0;
1240 }
1241
1242 if (!S_ISREG(buf->st_mode)) {
1243 if (mode_flag & DETAIL) {
1244 PRINT_FILE_NAME(file);
1245 STATISTIC_ERR_MSG(NGMSG_FILE_UNREG);
1246 }
1247 return 0;
1248 }
1249
1250 /* Access authority */
1251 if (current_uid != ROOT_UID &&
1252 buf->st_uid != current_uid) {
1253 if (mode_flag & DETAIL) {
1254 PRINT_FILE_NAME(file);
1255 STATISTIC_ERR_MSG(
1256 "File is not current user's file"
1257 " or current user is not root");
1258 }
1259 return 0;
1260 }
1261
1262 /* Empty file */
1263 if (buf->st_size == 0) {
1264 if (mode_flag & DETAIL) {
1265 PRINT_FILE_NAME(file);
1266 STATISTIC_ERR_MSG("File size is 0");
1267 }
1268 return 0;
1269 }
1270
1271 /* Has no blocks */
1272 if (buf->st_blocks == 0) {
1273 if (mode_flag & DETAIL) {
1274 PRINT_FILE_NAME(file);
1275 STATISTIC_ERR_MSG("File has no blocks");
1276 }
1277 return 0;
1278 }
1279
1280 fd = open64(file, O_RDONLY);
1281 if (fd < 0) {
1282 if (mode_flag & DETAIL) {
1283 PRINT_FILE_NAME(file);
1284 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1285 }
1286 return 0;
1287 }
1288
1289 /* Get file's physical extents */
1290 ret = get_file_extents(fd, &physical_list_head);
1291 if (ret < 0) {
1292 if (mode_flag & DETAIL) {
1293 PRINT_FILE_NAME(file);
1294 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1295 }
1296 goto out;
1297 }
1298
1299 /* Get the count of file's continuous physical region */
1300 physical_ext_count = get_physical_count(physical_list_head);
1301
1302 /* Change list from physical to logical */
1303 ret = change_physical_to_logical(&physical_list_head,
1304 &logical_list_head);
1305 if (ret < 0) {
1306 if (mode_flag & DETAIL) {
1307 PRINT_FILE_NAME(file);
1308 STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1309 }
1310 goto out;
1311 }
1312
1313 /* Count file fragments before defrag */
1314 now_ext_count = get_logical_count(logical_list_head);
1315
1316 if (current_uid == ROOT_UID) {
1317 /* Calculate fragment ratio */
1318 blk_count =
1319 SECTOR_TO_BLOCK(buf->st_blocks, block_size);
1320
1321 best_ext_count = get_best_count(blk_count);
1322
1323 ratio = (float)(physical_ext_count - best_ext_count) * 100 /
1324 blk_count;
1325
1326 extents_before_defrag += now_ext_count;
1327 extents_after_defrag += best_ext_count;
1328 files_block_count += blk_count;
1329 }
1330
1331 if (total_count == 1 && regular_count == 1) {
1332 /* File only */
1333 if (mode_flag & DETAIL) {
1334 int count = 0;
1335 struct fiemap_extent_list *ext_list_tmp =
1336 logical_list_head;
1337
1338 /* Print extents info */
1339 do {
1340 count++;
1341 printf("[ext %d]:\tstart %llu:\tlogical "
1342 "%llu:\tlen %llu\n", count,
1343 ext_list_tmp->data.physical,
1344 ext_list_tmp->data.logical,
1345 ext_list_tmp->data.len);
1346 ext_list_tmp = ext_list_tmp->next;
1347 } while (ext_list_tmp != logical_list_head);
1348
1349 } else {
1350 printf("%-40s%10s/%-10s%9s\n",
1351 "<File>", "now", "best", "ratio");
1352 if (current_uid == ROOT_UID) {
1353 if (strlen(file) > 40)
1354 printf("%s\n%50d/%-10d%8.2f%%\n",
1355 file, now_ext_count,
1356 best_ext_count, ratio);
1357 else
1358 printf("%-40s%10d/%-10d%8.2f%%\n",
1359 file, now_ext_count,
1360 best_ext_count, ratio);
1361 } else {
1362 if (strlen(file) > 40)
1363 printf("%s\n%50d/%-10s%7s\n",
1364 file, now_ext_count,
1365 "-", "-");
1366 else
1367 printf("%-40s%10d/%-10s%7s\n",
1368 file, now_ext_count,
1369 "-", "-");
1370 }
1371 }
1372 succeed_cnt++;
1373 goto out;
1374 }
1375
1376 if (mode_flag & DETAIL) {
1377 /* Print statistic info */
1378 sprintf(msg_buffer, "[%u/%u]%s",
1379 defraged_file_count, total_count, file);
1380 if (current_uid == ROOT_UID) {
1381 if (strlen(msg_buffer) > 40)
1382 printf("\033[79;0H\033[K%s\n"
1383 "%50d/%-10d%8.2f%%\n",
1384 msg_buffer, now_ext_count,
1385 best_ext_count, ratio);
1386 else
1387 printf("\033[79;0H\033[K%-40s"
1388 "%10d/%-10d%8.2f%%\n",
1389 msg_buffer, now_ext_count,
1390 best_ext_count, ratio);
1391 } else {
1392 if (strlen(msg_buffer) > 40)
1393 printf("\033[79;0H\033[K%s\n%50d/%-10s%7s\n",
1394 msg_buffer, now_ext_count,
1395 "-", "-");
1396 else
1397 printf("\033[79;0H\033[K%-40s%10d/%-10s%7s\n",
1398 msg_buffer, now_ext_count,
1399 "-", "-");
1400 }
1401 }
1402
1403 for (i = 0; i < SHOW_FRAG_FILES; i++) {
1404 if (ratio >= frag_rank[i].ratio) {
1405 for (j = SHOW_FRAG_FILES - 1; j > i; j--) {
1406 memcpy(&frag_rank[j], &frag_rank[j - 1],
1407 sizeof(struct frag_statistic_ino));
1408 }
1409 memset(&frag_rank[i], 0,
1410 sizeof(struct frag_statistic_ino));
1411 strncpy(frag_rank[i].msg_buffer, file,
1412 strnlen(file, PATH_MAX));
1413 frag_rank[i].now_count = now_ext_count;
1414 frag_rank[i].best_count = best_ext_count;
1415 frag_rank[i].ratio = ratio;
1416 break;
1417 }
1418 }
1419
1420 succeed_cnt++;
1421
1422 out:
1423 close(fd);
1424 free_ext(physical_list_head);
1425 free_ext(logical_list_head);
1426 return 0;
1427 }
1428
1429 /*
1430 * print_progress - Print defrag progress
1431 *
1432 * @file: file name.
1433 * @start: logical offset for defrag target file
1434 * @file_size: defrag target filesize
1435 */
1436 static void print_progress(const char *file, loff_t start, loff_t file_size)
1437 {
1438 int percent = (start * 100) / file_size;
1439 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1440 defraged_file_count, total_count, file, min(percent, 100));
1441 fflush(stdout);
1442
1443 return;
1444 }
1445
1446 /*
1447 * call_defrag() - Execute the defrag program.
1448 *
1449 * @fd: target file descriptor.
1450 * @donor_fd: donor file descriptor.
1451 * @file: target file name.
1452 * @buf: pointer of the struct stat64.
1453 * @ext_list_head: head of the extent list.
1454 */
1455 static int call_defrag(int fd, int donor_fd, const char *file,
1456 const struct stat64 *buf, struct fiemap_extent_list *ext_list_head)
1457 {
1458 loff_t start = 0;
1459 unsigned int page_num;
1460 unsigned char *vec = NULL;
1461 int defraged_ret = 0;
1462 int ret;
1463 struct move_extent move_data;
1464 struct fiemap_extent_list *ext_list_tmp = NULL;
1465
1466 memset(&move_data, 0, sizeof(struct move_extent));
1467 move_data.donor_fd = donor_fd;
1468
1469 /* Print defrag progress */
1470 print_progress(file, start, buf->st_size);
1471
1472 ext_list_tmp = ext_list_head;
1473 do {
1474 move_data.orig_start = ext_list_tmp->data.logical;
1475 /* Logical offset of orig and donor should be same */
1476 move_data.donor_start = move_data.orig_start;
1477 move_data.len = ext_list_tmp->data.len;
1478 move_data.moved_len = 0;
1479
1480 ret = page_in_core(fd, move_data, &vec, &page_num);
1481 if (ret < 0) {
1482 if (mode_flag & DETAIL) {
1483 printf("\n");
1484 PRINT_ERR_MSG_WITH_ERRNO(
1485 "Failed to get file map");
1486 } else {
1487 printf("\t[ NG ]\n");
1488 }
1489 return -1;
1490 }
1491
1492 /* EXT4_IOC_MOVE_EXT */
1493 defraged_ret =
1494 ioctl(fd, EXT4_IOC_MOVE_EXT, &move_data);
1495
1496 /* Free pages */
1497 ret = defrag_fadvise(fd, move_data, vec, page_num);
1498 if (vec) {
1499 free(vec);
1500 vec = NULL;
1501 }
1502 if (ret < 0) {
1503 if (mode_flag & DETAIL) {
1504 printf("\n");
1505 PRINT_ERR_MSG_WITH_ERRNO(
1506 "Failed to free page");
1507 } else {
1508 printf("\t[ NG ]\n");
1509 }
1510 return -1;
1511 }
1512
1513 if (defraged_ret < 0) {
1514 if (mode_flag & DETAIL) {
1515 printf("\n");
1516 PRINT_ERR_MSG_WITH_ERRNO(
1517 "Failed to defrag");
1518 } else {
1519 printf("\t[ NG ]\n");
1520 }
1521 return -1;
1522 }
1523 /* Adjust logical offset for next ioctl */
1524 move_data.orig_start += move_data.moved_len;
1525 move_data.donor_start = move_data.orig_start;
1526
1527 start = move_data.orig_start * buf->st_blksize;
1528
1529 /* Print defrag progress */
1530 print_progress(file, start, buf->st_size);
1531
1532 /* End of file */
1533 if (start >= buf->st_size)
1534 break;
1535
1536 ext_list_tmp = ext_list_tmp->next;
1537 } while (ext_list_tmp != ext_list_head);
1538
1539 return 0;
1540 }
1541
1542 /*
1543 * file_defrag() - Check file attributes and call ioctl to defrag.
1544 *
1545 * @file: the file's name.
1546 * @buf: the pointer of the struct stat64.
1547 * @flag: file type.
1548 * @ftwbuf: the pointer of a struct FTW.
1549 */
1550 static int file_defrag(const char *file, const struct stat64 *buf,
1551 int flag EXT2FS_ATTR((unused)),
1552 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1553 {
1554 int fd;
1555 int donor_fd = -1;
1556 int ret;
1557 int best;
1558 int file_frags_start, file_frags_end;
1559 int orig_physical_cnt, donor_physical_cnt = 0;
1560 char tmp_inode_name[PATH_MAX + 8];
1561 struct fiemap_extent_list *orig_list_physical = NULL;
1562 struct fiemap_extent_list *orig_list_logical = NULL;
1563 struct fiemap_extent_list *donor_list_physical = NULL;
1564 struct fiemap_extent_list *donor_list_logical = NULL;
1565 struct fiemap_extent_group *orig_group_head = NULL;
1566 struct fiemap_extent_group *orig_group_tmp = NULL;
1567
1568 defraged_file_count++;
1569
1570 if (mode_flag & DETAIL) {
1571 printf("[%u/%u]", defraged_file_count, total_count);
1572 fflush(stdout);
1573 }
1574
1575 if (lost_found_dir[0] != '\0' &&
1576 !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1577 if (mode_flag & DETAIL) {
1578 PRINT_FILE_NAME(file);
1579 IN_FTW_PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1580 }
1581 return 0;
1582 }
1583
1584 if (!S_ISREG(buf->st_mode)) {
1585 if (mode_flag & DETAIL) {
1586 PRINT_FILE_NAME(file);
1587 IN_FTW_PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1588 }
1589 return 0;
1590 }
1591
1592 /* Empty file */
1593 if (buf->st_size == 0) {
1594 if (mode_flag & DETAIL) {
1595 PRINT_FILE_NAME(file);
1596 IN_FTW_PRINT_ERR_MSG("File size is 0");
1597 }
1598 return 0;
1599 }
1600
1601 /* Has no blocks */
1602 if (buf->st_blocks == 0) {
1603 if (mode_flag & DETAIL) {
1604 PRINT_FILE_NAME(file);
1605 STATISTIC_ERR_MSG("File has no blocks");
1606 }
1607 return 0;
1608 }
1609
1610 fd = open64(file, O_RDWR);
1611 if (fd < 0) {
1612 if (mode_flag & DETAIL) {
1613 PRINT_FILE_NAME(file);
1614 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1615 }
1616 return 0;
1617 }
1618
1619 /* Get file's extents */
1620 ret = get_file_extents(fd, &orig_list_physical);
1621 if (ret < 0) {
1622 if (mode_flag & DETAIL) {
1623 PRINT_FILE_NAME(file);
1624 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1625 }
1626 goto out;
1627 }
1628
1629 /* Get the count of file's continuous physical region */
1630 orig_physical_cnt = get_physical_count(orig_list_physical);
1631
1632 /* Change list from physical to logical */
1633 ret = change_physical_to_logical(&orig_list_physical,
1634 &orig_list_logical);
1635 if (ret < 0) {
1636 if (mode_flag & DETAIL) {
1637 PRINT_FILE_NAME(file);
1638 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1639 }
1640 goto out;
1641 }
1642
1643 /* Count file fragments before defrag */
1644 file_frags_start = get_logical_count(orig_list_logical);
1645
1646 if (file_check(fd, buf, file, file_frags_start) < 0)
1647 goto out;
1648
1649 if (fsync(fd) < 0) {
1650 if (mode_flag & DETAIL) {
1651 PRINT_FILE_NAME(file);
1652 PRINT_ERR_MSG_WITH_ERRNO("Failed to sync(fsync)");
1653 }
1654 goto out;
1655 }
1656
1657 if (current_uid == ROOT_UID)
1658 best =
1659 get_best_count(SECTOR_TO_BLOCK(buf->st_blocks, block_size));
1660 else
1661 best = 1;
1662
1663 if (file_frags_start <= best)
1664 goto check_improvement;
1665
1666 /* Combine extents to group */
1667 ret = join_extents(orig_list_logical, &orig_group_head);
1668 if (ret < 0) {
1669 if (mode_flag & DETAIL) {
1670 PRINT_FILE_NAME(file);
1671 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1672 }
1673 goto out;
1674 }
1675
1676 /* Create donor inode */
1677 memset(tmp_inode_name, 0, PATH_MAX + 8);
1678 sprintf(tmp_inode_name, "%.*s.defrag",
1679 (int)strnlen(file, PATH_MAX), file);
1680 donor_fd = open64(tmp_inode_name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR);
1681 if (donor_fd < 0) {
1682 if (mode_flag & DETAIL) {
1683 PRINT_FILE_NAME(file);
1684 if (errno == EEXIST)
1685 PRINT_ERR_MSG_WITH_ERRNO(
1686 "File is being defraged by other program");
1687 else
1688 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1689 }
1690 goto out;
1691 }
1692
1693 /* Unlink donor inode */
1694 ret = unlink(tmp_inode_name);
1695 if (ret < 0) {
1696 if (mode_flag & DETAIL) {
1697 PRINT_FILE_NAME(file);
1698 PRINT_ERR_MSG_WITH_ERRNO("Failed to unlink");
1699 }
1700 goto out;
1701 }
1702
1703 /* Allocate space for donor inode */
1704 orig_group_tmp = orig_group_head;
1705 do {
1706 ret = fallocate(donor_fd, 0,
1707 (loff_t)orig_group_tmp->start->data.logical * block_size,
1708 (loff_t)orig_group_tmp->len * block_size);
1709 if (ret < 0) {
1710 if (mode_flag & DETAIL) {
1711 PRINT_FILE_NAME(file);
1712 PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
1713 }
1714 goto out;
1715 }
1716
1717 orig_group_tmp = orig_group_tmp->next;
1718 } while (orig_group_tmp != orig_group_head);
1719
1720 /* Get donor inode's extents */
1721 ret = get_file_extents(donor_fd, &donor_list_physical);
1722 if (ret < 0) {
1723 if (mode_flag & DETAIL) {
1724 PRINT_FILE_NAME(file);
1725 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1726 }
1727 goto out;
1728 }
1729
1730 /* Calcuate donor inode's continuous physical region */
1731 donor_physical_cnt = get_physical_count(donor_list_physical);
1732
1733 /* Change donor extent list from physical to logical */
1734 ret = change_physical_to_logical(&donor_list_physical,
1735 &donor_list_logical);
1736 if (ret < 0) {
1737 if (mode_flag & DETAIL) {
1738 PRINT_FILE_NAME(file);
1739 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1740 }
1741 goto out;
1742 }
1743
1744 check_improvement:
1745 if (mode_flag & DETAIL) {
1746 if (file_frags_start != 1)
1747 frag_files_before_defrag++;
1748
1749 extents_before_defrag += file_frags_start;
1750 }
1751
1752 if (file_frags_start <= best ||
1753 orig_physical_cnt <= donor_physical_cnt) {
1754 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1755 defraged_file_count, total_count, file, 100);
1756 if (mode_flag & DETAIL)
1757 printf(" extents: %d -> %d",
1758 file_frags_start, file_frags_start);
1759
1760 printf("\t[ OK ]\n");
1761 succeed_cnt++;
1762
1763 if (file_frags_start != 1)
1764 frag_files_after_defrag++;
1765
1766 extents_after_defrag += file_frags_start;
1767 goto out;
1768 }
1769
1770 /* Defrag the file */
1771 ret = call_defrag(fd, donor_fd, file, buf, donor_list_logical);
1772
1773 /* Count file fragments after defrag and print extents info */
1774 if (mode_flag & DETAIL) {
1775 file_frags_end = file_frag_count(fd);
1776 if (file_frags_end < 0) {
1777 printf("\n");
1778 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_INFO);
1779 goto out;
1780 }
1781
1782 if (file_frags_end != 1)
1783 frag_files_after_defrag++;
1784
1785 extents_after_defrag += file_frags_end;
1786
1787 if (ret < 0)
1788 goto out;
1789
1790 printf(" extents: %d -> %d",
1791 file_frags_start, file_frags_end);
1792 fflush(stdout);
1793 }
1794
1795 if (ret < 0)
1796 goto out;
1797
1798 printf("\t[ OK ]\n");
1799 fflush(stdout);
1800 succeed_cnt++;
1801
1802 out:
1803 close(fd);
1804 if (donor_fd != -1)
1805 close(donor_fd);
1806 free_ext(orig_list_physical);
1807 free_ext(orig_list_logical);
1808 free_ext(donor_list_physical);
1809 free_exts_group(orig_group_head);
1810 return 0;
1811 }
1812
1813 /*
1814 * main() - Ext4 online defrag.
1815 *
1816 * @argc: the number of parameter.
1817 * @argv[]: the pointer array of parameter.
1818 */
1819 int main(int argc, char *argv[])
1820 {
1821 int opt;
1822 int i, j;
1823 int flags = FTW_PHYS | FTW_MOUNT;
1824 int arg_type = -1;
1825 int success_flag = 0;
1826 char dir_name[PATH_MAX + 1];
1827 struct stat64 buf;
1828 struct ext4_super_block sb;
1829
1830 /* Parse arguments */
1831 if (argc == 1)
1832 goto out;
1833
1834 while ((opt = getopt(argc, argv, "vc")) != EOF) {
1835 switch (opt) {
1836 case 'v':
1837 mode_flag |= DETAIL;
1838 break;
1839 case 'c':
1840 mode_flag |= STATISTIC;
1841 break;
1842 default:
1843 goto out;
1844 }
1845 }
1846
1847 if (argc == optind)
1848 goto out;
1849
1850 current_uid = getuid();
1851
1852 /* Main process */
1853 for (i = optind; i < argc; i++) {
1854 succeed_cnt = 0;
1855 regular_count = 0;
1856 total_count = 0;
1857 frag_files_before_defrag = 0;
1858 frag_files_after_defrag = 0;
1859 extents_before_defrag = 0;
1860 extents_after_defrag = 0;
1861 defraged_file_count = 0;
1862 files_block_count = 0;
1863 blocks_per_group = 0;
1864 feature_incompat = 0;
1865 log_groups_per_flex = 0;
1866
1867 memset(dir_name, 0, PATH_MAX + 1);
1868 memset(lost_found_dir, 0, PATH_MAX + 1);
1869 memset(frag_rank, 0,
1870 sizeof(struct frag_statistic_ino) * SHOW_FRAG_FILES);
1871
1872 if ((mode_flag & STATISTIC) && i > optind)
1873 printf("\n");
1874
1875 #if BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN
1876 PRINT_ERR_MSG("Endian's type is not big/little endian");
1877 PRINT_FILE_NAME(argv[i]);
1878 continue;
1879 #endif
1880
1881 if (lstat64(argv[i], &buf) < 0) {
1882 perror(NGMSG_FILE_INFO);
1883 PRINT_FILE_NAME(argv[i]);
1884 continue;
1885 }
1886
1887 if (S_ISBLK(buf.st_mode)) {
1888 /* Block device */
1889 if (get_mount_point(argv[i], dir_name, PATH_MAX) < 0)
1890 continue;
1891 if (lstat64(dir_name, &buf) < 0) {
1892 perror(NGMSG_FILE_INFO);
1893 PRINT_FILE_NAME(argv[i]);
1894 continue;
1895 }
1896 arg_type = DEVNAME;
1897 if (!(mode_flag & STATISTIC))
1898 printf("ext4 defragmentation for device(%s)\n",
1899 argv[i]);
1900 } else if (S_ISDIR(buf.st_mode)) {
1901 /* Directory */
1902 if (access(argv[i], R_OK) < 0) {
1903 perror(argv[i]);
1904 continue;
1905 }
1906 arg_type = DIRNAME;
1907 strncpy(dir_name, argv[i], strnlen(argv[i], PATH_MAX));
1908 } else if (S_ISREG(buf.st_mode)) {
1909 /* Regular file */
1910 arg_type = FILENAME;
1911 } else {
1912 /* Irregular file */
1913 PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1914 PRINT_FILE_NAME(argv[i]);
1915 continue;
1916 }
1917
1918 /* Set blocksize */
1919 block_size = buf.st_blksize;
1920
1921 /* For device case,
1922 * filesystem type checked in get_mount_point()
1923 */
1924 if (arg_type == FILENAME || arg_type == DIRNAME) {
1925 if (is_ext4(argv[i]) < 0)
1926 continue;
1927 if (realpath(argv[i], dir_name) == NULL) {
1928 perror("Couldn't get full path");
1929 PRINT_FILE_NAME(argv[i]);
1930 continue;
1931 }
1932 }
1933
1934 if (current_uid == ROOT_UID) {
1935 /* Get super block info */
1936 memset(&sb, 0, sizeof(struct ext4_super_block));
1937 if (get_superblock_info(dir_name, &sb) < 0) {
1938 if (mode_flag & DETAIL) {
1939 perror("Can't get super block info");
1940 PRINT_FILE_NAME(argv[i]);
1941 }
1942 continue;
1943 }
1944
1945 blocks_per_group = ext2fs_swab32(sb.s_blocks_per_group);
1946 feature_incompat = ext2fs_swab32(sb.s_feature_incompat);
1947 log_groups_per_flex = sb.s_log_groups_per_flex;
1948 }
1949
1950 switch (arg_type) {
1951 case DIRNAME:
1952 if (!(mode_flag & STATISTIC))
1953 printf("ext4 defragmentation "
1954 "for directory(%s)\n", argv[i]);
1955
1956 int mount_dir_len = 0;
1957 mount_dir_len = strnlen(lost_found_dir, PATH_MAX);
1958
1959 strncat(lost_found_dir, "/lost+found",
1960 PATH_MAX - strnlen(lost_found_dir, PATH_MAX));
1961
1962 /* Not the case("e4defrag mount_piont_dir") */
1963 if (dir_name[mount_dir_len] != '\0') {
1964 /*
1965 * "e4defrag mount_piont_dir/lost+found"
1966 * or "e4defrag mount_piont_dir/lost+found/"
1967 */
1968 if (strncmp(lost_found_dir, dir_name,
1969 strnlen(lost_found_dir,
1970 PATH_MAX)) == 0 &&
1971 (dir_name[strnlen(lost_found_dir,
1972 PATH_MAX)] == '\0' ||
1973 dir_name[strnlen(lost_found_dir,
1974 PATH_MAX)] == '/')) {
1975 PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1976 PRINT_FILE_NAME(argv[i]);
1977 continue;
1978 }
1979
1980 /* "e4defrag mount_piont_dir/else_dir" */
1981 memset(lost_found_dir, 0, PATH_MAX + 1);
1982 }
1983 case DEVNAME:
1984 if (arg_type == DEVNAME) {
1985 strncpy(lost_found_dir, dir_name,
1986 strnlen(dir_name, PATH_MAX));
1987 strncat(lost_found_dir, "/lost+found/",
1988 PATH_MAX - strnlen(lost_found_dir,
1989 PATH_MAX));
1990 }
1991
1992 nftw64(dir_name, calc_entry_counts, FTW_OPEN_FD, flags);
1993
1994 if (mode_flag & STATISTIC) {
1995 if (mode_flag & DETAIL)
1996 printf("%-40s%10s/%-10s%9s\n",
1997 "<File>", "now", "best", "ratio");
1998
1999 if (!(mode_flag & DETAIL) &&
2000 current_uid != ROOT_UID) {
2001 printf(" Done.\n");
2002 continue;
2003 }
2004
2005 nftw64(dir_name, file_statistic,
2006 FTW_OPEN_FD, flags);
2007
2008 if (succeed_cnt != 0 &&
2009 current_uid == ROOT_UID) {
2010 if (mode_flag & DETAIL)
2011 printf("\n");
2012 printf("%-40s%10s/%-10s%9s\n",
2013 "<Fragmented files>", "now",
2014 "best", "ratio");
2015 for (j = 0; j < SHOW_FRAG_FILES; j++) {
2016 if (strlen(frag_rank[j].
2017 msg_buffer) > 37) {
2018 printf("%d. %s\n%50d/"
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 if (strlen(frag_rank[j].
2025 msg_buffer) > 0) {
2026 printf("%d. %-37s%10d/"
2027 "%-10d%8.2f%%\n", j + 1,
2028 frag_rank[j].msg_buffer,
2029 frag_rank[j].now_count,
2030 frag_rank[j].best_count,
2031 frag_rank[j].ratio);
2032 } else
2033 break;
2034 }
2035 }
2036 break;
2037 }
2038 /* File tree walk */
2039 nftw64(dir_name, file_defrag, FTW_OPEN_FD, flags);
2040 printf("\n\tSuccess:\t\t\t[ %u/%u ]\n", succeed_cnt,
2041 total_count);
2042 printf("\tFailure:\t\t\t[ %u/%u ]\n",
2043 total_count - succeed_cnt, total_count);
2044 if (mode_flag & DETAIL) {
2045 printf("\tTotal extents:\t\t\t%4d->%d\n",
2046 extents_before_defrag,
2047 extents_after_defrag);
2048 printf("\tFragmented percentage:\t\t"
2049 "%3llu%%->%llu%%\n",
2050 !regular_count ? 0 :
2051 ((unsigned long long)
2052 frag_files_before_defrag * 100) /
2053 regular_count,
2054 !regular_count ? 0 :
2055 ((unsigned long long)
2056 frag_files_after_defrag * 100) /
2057 regular_count);
2058 }
2059 break;
2060 case FILENAME:
2061 total_count = 1;
2062 regular_count = 1;
2063 strncat(lost_found_dir, "/lost+found/",
2064 PATH_MAX - strnlen(lost_found_dir,
2065 PATH_MAX));
2066 if (strncmp(lost_found_dir, dir_name,
2067 strnlen(lost_found_dir,
2068 PATH_MAX)) == 0) {
2069 PRINT_ERR_MSG(NGMSG_LOST_FOUND);
2070 PRINT_FILE_NAME(argv[i]);
2071 continue;
2072 }
2073
2074 if (mode_flag & STATISTIC) {
2075 file_statistic(argv[i], &buf, FTW_F, NULL);
2076 break;
2077 } else
2078 printf("ext4 defragmentation for %s\n",
2079 argv[i]);
2080 /* Defrag single file process */
2081 file_defrag(argv[i], &buf, FTW_F, NULL);
2082 if (succeed_cnt != 0)
2083 printf(" Success:\t\t\t[1/1]\n");
2084 else
2085 printf(" Success:\t\t\t[0/1]\n");
2086
2087 break;
2088 }
2089
2090 if (succeed_cnt != 0)
2091 success_flag = 1;
2092 if (mode_flag & STATISTIC) {
2093 if (current_uid != ROOT_UID) {
2094 printf(" Done.\n");
2095 continue;
2096 }
2097
2098 if (!succeed_cnt) {
2099 if (mode_flag & DETAIL)
2100 printf("\n");
2101
2102 if (arg_type == DEVNAME)
2103 printf(" In this device(%s), "
2104 "none can be defragmented.\n", argv[i]);
2105 else if (arg_type == DIRNAME)
2106 printf(" In this directory(%s), "
2107 "none can be defragmented.\n", argv[i]);
2108 else
2109 printf(" This file(%s) "
2110 "can't be defragmented.\n", argv[i]);
2111 } else {
2112 float files_ratio = 0.0;
2113 float score = 0.0;
2114 files_ratio = (float)(extents_before_defrag -
2115 extents_after_defrag) *
2116 100 / files_block_count;
2117 score = CALC_SCORE(files_ratio);
2118 printf("\n Total/best extents\t\t\t\t%d/%d\n"
2119 " Fragmentation ratio\t\t\t\t%.2f%%\n"
2120 " Fragmentation score\t\t\t\t%.2f\n",
2121 extents_before_defrag,
2122 extents_after_defrag,
2123 files_ratio, score);
2124 printf(" [0-30 no problem:"
2125 " 31-55 a little bit fragmented:"
2126 " 55- needs defrag]\n");
2127
2128 if (arg_type == DEVNAME)
2129 printf(" This device(%s) ", argv[i]);
2130 else if (arg_type == DIRNAME)
2131 printf(" This directory(%s) ", argv[i]);
2132 else
2133 printf(" This file(%s) ", argv[i]);
2134
2135 if (score > BOUND_SCORE)
2136 printf("needs defragmentation.\n");
2137 else
2138 printf("does not need "
2139 "defragmentation.\n");
2140 }
2141 printf(" Done.\n");
2142 }
2143
2144 }
2145
2146 if (success_flag)
2147 return 0;
2148
2149 exit(1);
2150
2151 out:
2152 printf(MSG_USAGE);
2153 exit(1);
2154 }
2155
Unnamed repository; edit this file 'description' to name the repository.