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 "config.h"
  23 #include <ctype.h>
  24 #include <dirent.h>
  25 #include <endian.h>
  26 #include <errno.h>
  27 #include <fcntl.h>
  28 #include <ftw.h>
  29 #include <limits.h>
  30 #include <mntent.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35 #include <ext2fs/ext2_types.h>
  36 #include <ext2fs/ext2fs.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/vfs.h>
  43
  44 #include "../version.h"
  45
  46 /* A relatively new ioctl interface ... */
  47 #ifndef EXT4_IOC_MOVE_EXT
  48 #define EXT4_IOC_MOVE_EXT      _IOWR('f', 15, struct move_extent)
  49 #endif
  50
  51 /* Macro functions */
  52 #define PRINT_ERR_MSG(msg)      fprintf(stderr, "%s\n", (msg))
  53 #define IN_FTW_PRINT_ERR_MSG(msg)       \
  54         fprintf(stderr, "\t%s\t\t[ NG ]\n", (msg))
  55 #define PRINT_FILE_NAME(file)   fprintf(stderr, " \"%s\"\n", (file))
  56 #define PRINT_ERR_MSG_WITH_ERRNO(msg)   \
  57         fprintf(stderr, "\t%s:%s\t[ NG ]\n", (msg), strerror(errno))
  58 #define STATISTIC_ERR_MSG(msg)  \
  59         fprintf(stderr, "\t%s\n", (msg))
  60 #define STATISTIC_ERR_MSG_WITH_ERRNO(msg)       \
  61         fprintf(stderr, "\t%s:%s\n", (msg), strerror(errno))
  62 #define min(x, y) (((x) > (y)) ? (y) : (x))
  63 #define CALC_SCORE(ratio) \
  64         ((ratio) > 10 ? (80 + 20 * (ratio) / 100) : (8 * (ratio)))
  65 /* Wrap up the free function */
  66 #define FREE(tmp)                               \
  67         do {                                    \
  68                 if ((tmp) != NULL)              \
  69                         free(tmp);              \
  70         } while (0)                             \
  71 /* Insert list2 after list1 */
  72 #define insert(list1, list2)                    \
  73         do {                                    \
  74                 list2->next = list1->next;      \
  75                 list1->next->prev = list2;      \
  76                 list2->prev = list1;            \
  77                 list1->next = list2;            \
  78         } while (0)
  79
  80 /* To delete unused warning */
  81 #ifdef __GNUC__
  82 #define EXT2FS_ATTR(x) __attribute__(x)
  83 #else
  84 #define EXT2FS_ATTR(x)
  85 #endif
  86
  87 /* The mode of defrag */
  88 #define DETAIL                  0x01
  89 #define STATISTIC               0x02
  90
  91 #define DEVNAME                 0
  92 #define DIRNAME                 1
  93 #define FILENAME                2
  94
  95 #define FTW_OPEN_FD             2000
  96
  97 #define FS_EXT4                 "ext4"
  98 #define ROOT_UID                0
  99
 100 #define BOUND_SCORE             55
 101 #define SHOW_FRAG_FILES 5
 102
 103 /* Magic number for ext4 */
 104 #define EXT4_SUPER_MAGIC        0xEF53
 105
 106 /* Definition of flex_bg */
 107 #define EXT4_FEATURE_INCOMPAT_FLEX_BG           0x0200
 108
 109 /* The following macro is used for ioctl FS_IOC_FIEMAP
 110  * EXTENT_MAX_COUNT:    the maximum number of extents for exchanging between
 111  *                      kernel-space and user-space per ioctl
 112  */
 113 #define EXTENT_MAX_COUNT        512
 114
 115 /* The following macros are error message */
 116 #define MSG_USAGE               \
 117 "Usage  : e4defrag [-v] file...| directory...| device...\n\
 118         : e4defrag  -c  file...| directory...| device...\n"
 119
 120 #define NGMSG_EXT4              "Filesystem is not ext4 filesystem"
 121 #define NGMSG_FILE_EXTENT       "Failed to get file extents"
 122 #define NGMSG_FILE_INFO         "Failed to get file information"
 123 #define NGMSG_FILE_OPEN         "Failed to open"
 124 #define NGMSG_FILE_UNREG        "File is not regular file"
 125 #define NGMSG_LOST_FOUND        "Can not process \"lost+found\""
 126
 127 /* Data type for filesystem-wide blocks number */
 128 typedef unsigned long long ext4_fsblk_t;
 129
 130 struct fiemap_extent_data {
 131         __u64 len;                      /* blocks count */
 132         __u64 logical;          /* start logical block number */
 133         ext4_fsblk_t physical;          /* start physical block number */
 134 };
 135
 136 struct fiemap_extent_list {
 137         struct fiemap_extent_list *prev;
 138         struct fiemap_extent_list *next;
 139         struct fiemap_extent_data data; /* extent belong to file */
 140 };
 141
 142 struct fiemap_extent_group {
 143         struct fiemap_extent_group *prev;
 144         struct fiemap_extent_group *next;
 145         __u64 len;      /* length of this continuous region */
 146         struct fiemap_extent_list *start;       /* start ext */
 147         struct fiemap_extent_list *end;         /* end ext */
 148 };
 149
 150 struct move_extent {
 151         __s32 reserved; /* original file descriptor */
 152         __u32 donor_fd; /* donor file descriptor */
 153         __u64 orig_start;       /* logical start offset in block for orig */
 154         __u64 donor_start;      /* logical start offset in block for donor */
 155         __u64 len;      /* block length to be moved */
 156         __u64 moved_len;        /* moved block length */
 157 };
 158
 159 struct frag_statistic_ino {
 160         int now_count;  /* the file's extents count of before defrag */
 161         int best_count; /* the best file's extents count */
 162         __u64 size_per_ext;     /* size(KB) per extent */
 163         float ratio;    /* the ratio of fragmentation */
 164         char msg_buffer[PATH_MAX + 1];  /* pathname of the file */
 165 };
 166
 167 static char     lost_found_dir[PATH_MAX + 1];
 168 static int      block_size;
 169 static int      extents_before_defrag;
 170 static int      extents_after_defrag;
 171 static int      mode_flag;
 172 static unsigned int     current_uid;
 173 static unsigned int     defraged_file_count;
 174 static unsigned int     frag_files_before_defrag;
 175 static unsigned int     frag_files_after_defrag;
 176 static unsigned int     regular_count;
 177 static unsigned int     succeed_cnt;
 178 static unsigned int     total_count;
 179 static __u8 log_groups_per_flex;
 180 static __u32 blocks_per_group;
 181 static __u32 feature_incompat;
 182 static ext4_fsblk_t     files_block_count;
 183 static struct frag_statistic_ino        frag_rank[SHOW_FRAG_FILES];
 184
 185
 186 /*
 187  * We prefer posix_fadvise64 when available, as it allows 64bit offset on
 188  * 32bit systems
 189  */
 190 #if defined(HAVE_POSIX_FADVISE64)
 191 #define posix_fadvise   posix_fadvise64
 192 #elif defined(HAVE_FADVISE64)
 193 #define posix_fadvise   fadvise64
 194 #elif !defined(HAVE_POSIX_FADVISE)
 195 #error posix_fadvise not available!
 196 #endif
 197
 198 #ifndef HAVE_FALLOCATE64
 199 #error fallocate64 not available!
 200 #endif /* ! HAVE_FALLOCATE64 */
 201
 202 /*
 203  * get_mount_point() -  Get device's mount point.
 204  *
 205  * @devname:            the device's name.
 206  * @mount_point:        the mount point.
 207  * @dir_path_len:       the length of directory.
 208  */
 209 static int get_mount_point(const char *devname, char *mount_point,
 210                                                         int dir_path_len)
 211 {
 212         /* Refer to /etc/mtab */
 213         const char      *mtab = MOUNTED;
 214         FILE            *fp = NULL;
 215         struct mntent   *mnt = NULL;
 216         struct stat64   sb;
 217
 218         if (stat64(devname, &sb) < 0) {
 219                 perror(NGMSG_FILE_INFO);
 220                 PRINT_FILE_NAME(devname);
 221                 return -1;
 222         }
 223
 224         fp = setmntent(mtab, "r");
 225         if (fp == NULL) {
 226                 perror("Couldn't access /etc/mtab");
 227                 return -1;
 228         }
 229
 230         while ((mnt = getmntent(fp)) != NULL) {
 231                 struct stat64 ms;
 232
 233                 /*
 234                  * To handle device symlinks, we see if the
 235                  * device number matches, not the name
 236                  */
 237                 if (stat64(mnt->mnt_fsname, &ms) < 0)
 238                         continue;
 239                 if (sb.st_rdev != ms.st_rdev)
 240                         continue;
 241
 242                 endmntent(fp);
 243                 if (strcmp(mnt->mnt_type, FS_EXT4) == 0) {
 244                         strncpy(mount_point, mnt->mnt_dir,
 245                                 dir_path_len);
 246                         return 0;
 247                 }
 248                 PRINT_ERR_MSG(NGMSG_EXT4);
 249                 return -1;
 250         }
 251         endmntent(fp);
 252         PRINT_ERR_MSG("Filesystem is not mounted");
 253         return -1;
 254 }
 255
 256 /*
 257  * is_ext4() -          Whether on an ext4 filesystem.
 258  *
 259  * @file:               the file's name.
 260  */
 261 static int is_ext4(const char *file, char *devname)
 262 {
 263         int     maxlen = 0;
 264         int     len, ret;
 265         FILE    *fp = NULL;
 266         char    *mnt_type = NULL;
 267         /* Refer to /etc/mtab */
 268         const char      *mtab = MOUNTED;
 269         char    file_path[PATH_MAX + 1];
 270         struct mntent   *mnt = NULL;
 271         struct statfs64 fsbuf;
 272
 273         /* Get full path */
 274         if (realpath(file, file_path) == NULL) {
 275                 perror("Couldn't get full path");
 276                 PRINT_FILE_NAME(file);
 277                 return -1;
 278         }
 279
 280         if (statfs64(file_path, &fsbuf) < 0) {
 281                 perror("Failed to get filesystem information");
 282                 PRINT_FILE_NAME(file);
 283                 return -1;
 284         }
 285
 286         if (fsbuf.f_type != EXT4_SUPER_MAGIC) {
 287                 PRINT_ERR_MSG(NGMSG_EXT4);
 288                 return -1;
 289         }
 290
 291         fp = setmntent(mtab, "r");
 292         if (fp == NULL) {
 293                 perror("Couldn't access /etc/mtab");
 294                 return -1;
 295         }
 296
 297         while ((mnt = getmntent(fp)) != NULL) {
 298                 if (mnt->mnt_fsname[0] != '/')
 299                         continue;
 300                 len = strlen(mnt->mnt_dir);
 301                 ret = memcmp(file_path, mnt->mnt_dir, len);
 302                 if (ret != 0)
 303                         continue;
 304
 305                 if (maxlen >= len)
 306                         continue;
 307
 308                 maxlen = len;
 309
 310                 mnt_type = realloc(mnt_type, strlen(mnt->mnt_type) + 1);
 311                 if (mnt_type == NULL) {
 312                         endmntent(fp);
 313                         return -1;
 314                 }
 315                 memset(mnt_type, 0, strlen(mnt->mnt_type) + 1);
 316                 strncpy(mnt_type, mnt->mnt_type, strlen(mnt->mnt_type));
 317                 strncpy(lost_found_dir, mnt->mnt_dir, PATH_MAX);
 318                 strncpy(devname, mnt->mnt_fsname, strlen(mnt->mnt_fsname) + 1);
 319         }
 320
 321         endmntent(fp);
 322         if (mnt_type && strcmp(mnt_type, FS_EXT4) == 0) {
 323                 FREE(mnt_type);
 324                 return 0;
 325         } else {
 326                 FREE(mnt_type);
 327                 PRINT_ERR_MSG(NGMSG_EXT4);
 328                 return -1;
 329         }
 330 }
 331
 332 /*
 333  * calc_entry_counts() -        Calculate file counts.
 334  *
 335  * @file:               file name.
 336  * @buf:                file info.
 337  * @flag:               file type.
 338  * @ftwbuf:             the pointer of a struct FTW.
 339  */
 340 static int calc_entry_counts(const char *file EXT2FS_ATTR((unused)),
 341                 const struct stat64 *buf, int flag EXT2FS_ATTR((unused)),
 342                 struct FTW *ftwbuf EXT2FS_ATTR((unused)))
 343 {
 344         if (S_ISREG(buf->st_mode))
 345                 regular_count++;
 346
 347         total_count++;
 348
 349         return 0;
 350 }
 351
 352 /*
 353  * page_in_core() -     Get information on whether pages are in core.
 354  *
 355  * @fd:                 defrag target file's descriptor.
 356  * @defrag_data:        data used for defrag.
 357  * @vec:                page state array.
 358  * @page_num:           page number.
 359  */
 360 static int page_in_core(int fd, struct move_extent defrag_data,
 361                         unsigned char **vec, unsigned int *page_num)
 362 {
 363         long    pagesize;
 364         void    *page = NULL;
 365         loff_t  offset, end_offset, length;
 366
 367         if (vec == NULL || *vec != NULL)
 368                 return -1;
 369
 370         pagesize = sysconf(_SC_PAGESIZE);
 371         if (pagesize < 0)
 372                 return -1;
 373         /* In mmap, offset should be a multiple of the page size */
 374         offset = (loff_t)defrag_data.orig_start * block_size;
 375         length = (loff_t)defrag_data.len * block_size;
 376         end_offset = offset + length;
 377         /* Round the offset down to the nearest multiple of pagesize */
 378         offset = (offset / pagesize) * pagesize;
 379         length = end_offset - offset;
 380
 381         page = mmap(NULL, length, PROT_READ, MAP_SHARED, fd, offset);
 382         if (page == MAP_FAILED)
 383                 return -1;
 384
 385         *page_num = 0;
 386         *page_num = (length + pagesize - 1) / pagesize;
 387         *vec = (unsigned char *)calloc(*page_num, 1);
 388         if (*vec == NULL) {
 389                 munmap(page, length);
 390                 return -1;
 391         }
 392
 393         /* Get information on whether pages are in core */
 394         if (mincore(page, (size_t)length, *vec) == -1 ||
 395                 munmap(page, length) == -1) {
 396                 FREE(*vec);
 397                 return -1;
 398         }
 399
 400         return 0;
 401 }
 402
 403 /*
 404  * defrag_fadvise() -   Predeclare an access pattern for file data.
 405  *
 406  * @fd:                 defrag target file's descriptor.
 407  * @defrag_data:        data used for defrag.
 408  * @vec:                page state array.
 409  * @page_num:           page number.
 410  */
 411 static int defrag_fadvise(int fd, struct move_extent defrag_data,
 412                    unsigned char *vec, unsigned int page_num)
 413 {
 414         int     flag = 1;
 415         long    pagesize = sysconf(_SC_PAGESIZE);
 416         int     fadvise_flag = POSIX_FADV_DONTNEED;
 417         int     sync_flag = SYNC_FILE_RANGE_WAIT_BEFORE |
 418                             SYNC_FILE_RANGE_WRITE |
 419                             SYNC_FILE_RANGE_WAIT_AFTER;
 420         unsigned int    i;
 421         loff_t  offset;
 422
 423         if (pagesize < 1)
 424                 return -1;
 425
 426         offset = (loff_t)defrag_data.orig_start * block_size;
 427         offset = (offset / pagesize) * pagesize;
 428
 429 #ifdef HAVE_SYNC_FILE_RANGE
 430         /* Sync file for fadvise process */
 431         if (sync_file_range(fd, offset,
 432                 (loff_t)pagesize * page_num, sync_flag) < 0)
 433                 return -1;
 434 #endif
 435
 436         /* Try to release buffer cache which this process used,
 437          * then other process can use the released buffer
 438          */
 439         for (i = 0; i < page_num; i++) {
 440                 if ((vec[i] & 0x1) == 0) {
 441                         offset += pagesize;
 442                         continue;
 443                 }
 444                 if (posix_fadvise(fd, offset, pagesize, fadvise_flag) < 0) {
 445                         if ((mode_flag & DETAIL) && flag) {
 446                                 perror("\tFailed to fadvise");
 447                                 flag = 0;
 448                         }
 449                 }
 450                 offset += pagesize;
 451         }
 452
 453         return 0;
 454 }
 455
 456 /*
 457  * check_free_size() -  Check if there's enough disk space.
 458  *
 459  * @fd:                 defrag target file's descriptor.
 460  * @file:               file name.
 461  * @blk_count:          file blocks.
 462  */
 463 static int check_free_size(int fd, const char *file, ext4_fsblk_t blk_count)
 464 {
 465         ext4_fsblk_t    free_blk_count;
 466         struct statfs64 fsbuf;
 467
 468         if (fstatfs64(fd, &fsbuf) < 0) {
 469                 if (mode_flag & DETAIL) {
 470                         PRINT_FILE_NAME(file);
 471                         PRINT_ERR_MSG_WITH_ERRNO(
 472                                 "Failed to get filesystem information");
 473                 }
 474                 return -1;
 475         }
 476
 477         /* Compute free space for root and normal user separately */
 478         if (current_uid == ROOT_UID)
 479                 free_blk_count = fsbuf.f_bfree;
 480         else
 481                 free_blk_count = fsbuf.f_bavail;
 482
 483         if (free_blk_count >= blk_count)
 484                 return 0;
 485
 486         return -ENOSPC;
 487 }
 488
 489 /*
 490  * file_frag_count() -  Get file fragment count.
 491  *
 492  * @fd:                 defrag target file's descriptor.
 493  */
 494 static int file_frag_count(int fd)
 495 {
 496         int     ret;
 497         struct fiemap   fiemap_buf;
 498
 499         /* When fm_extent_count is 0,
 500          * ioctl just get file fragment count.
 501          */
 502         memset(&fiemap_buf, 0, sizeof(struct fiemap));
 503         fiemap_buf.fm_start = 0;
 504         fiemap_buf.fm_length = FIEMAP_MAX_OFFSET;
 505         fiemap_buf.fm_flags |= FIEMAP_FLAG_SYNC;
 506
 507         ret = ioctl(fd, FS_IOC_FIEMAP, &fiemap_buf);
 508         if (ret < 0)
 509                 return ret;
 510
 511         return fiemap_buf.fm_mapped_extents;
 512 }
 513
 514 /*
 515  * file_check() -       Check file's attributes.
 516  *
 517  * @fd:                 defrag target file's descriptor.
 518  * @buf:                a pointer of the struct stat64.
 519  * @file:               file name.
 520  * @extents:            file extents.
 521  * @blk_count:          file blocks.
 522  */
 523 static int file_check(int fd, const struct stat64 *buf, const char *file,
 524                 int extents, ext4_fsblk_t blk_count)
 525 {
 526         int     ret;
 527         struct flock    lock;
 528
 529         /* Write-lock check is more reliable */
 530         lock.l_type = F_WRLCK;
 531         lock.l_start = 0;
 532         lock.l_whence = SEEK_SET;
 533         lock.l_len = 0;
 534
 535         /* Free space */
 536         ret = check_free_size(fd, file, blk_count);
 537         if (ret < 0) {
 538                 if ((mode_flag & DETAIL) && ret == -ENOSPC) {
 539                         printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
 540                                 "  extents: %d -> %d\n", defraged_file_count,
 541                                 total_count, file, extents, extents);
 542                         IN_FTW_PRINT_ERR_MSG(
 543                         "Defrag size is larger than filesystem's free space");
 544                 }
 545                 return -1;
 546         }
 547
 548         /* Access authority */
 549         if (current_uid != ROOT_UID &&
 550                 buf->st_uid != current_uid) {
 551                 if (mode_flag & DETAIL) {
 552                         printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
 553                                 "  extents: %d -> %d\n", defraged_file_count,
 554                                 total_count, file, extents, extents);
 555                         IN_FTW_PRINT_ERR_MSG(
 556                                 "File is not current user's file"
 557                                 " or current user is not root");
 558                 }
 559                 return -1;
 560         }
 561
 562         /* Lock status */
 563         if (fcntl(fd, F_GETLK, &lock) < 0) {
 564                 if (mode_flag & DETAIL) {
 565                         PRINT_FILE_NAME(file);
 566                         PRINT_ERR_MSG_WITH_ERRNO(
 567                                 "Failed to get lock information");
 568                 }
 569                 return -1;
 570         } else if (lock.l_type != F_UNLCK) {
 571                 if (mode_flag & DETAIL) {
 572                         PRINT_FILE_NAME(file);
 573                         IN_FTW_PRINT_ERR_MSG("File has been locked");
 574                 }
 575                 return -1;
 576         }
 577
 578         return 0;
 579 }
 580
 581 /*
 582  * insert_extent_by_logical() - Sequentially insert extent by logical.
 583  *
 584  * @ext_list_head:      the head of logical extent list.
 585  * @ext:                the extent element which will be inserted.
 586  */
 587 static int insert_extent_by_logical(struct fiemap_extent_list **ext_list_head,
 588                         struct fiemap_extent_list *ext)
 589 {
 590         struct fiemap_extent_list       *ext_list_tmp = *ext_list_head;
 591
 592         if (ext == NULL)
 593                 goto out;
 594
 595         /* First element */
 596         if (*ext_list_head == NULL) {
 597                 (*ext_list_head) = ext;
 598                 (*ext_list_head)->prev = *ext_list_head;
 599                 (*ext_list_head)->next = *ext_list_head;
 600                 return 0;
 601         }
 602
 603         if (ext->data.logical <= ext_list_tmp->data.logical) {
 604                 /* Insert before head */
 605                 if (ext_list_tmp->data.logical <
 606                         ext->data.logical + ext->data.len)
 607                         /* Overlap */
 608                         goto out;
 609                 /* Adjust head */
 610                 *ext_list_head = ext;
 611         } else {
 612                 /* Insert into the middle or last of the list */
 613                 do {
 614                         if (ext->data.logical < ext_list_tmp->data.logical)
 615                                 break;
 616                         ext_list_tmp = ext_list_tmp->next;
 617                 } while (ext_list_tmp != (*ext_list_head));
 618                 if (ext->data.logical <
 619                     ext_list_tmp->prev->data.logical +
 620                         ext_list_tmp->prev->data.len)
 621                         /* Overlap */
 622                         goto out;
 623
 624                 if (ext_list_tmp != *ext_list_head &&
 625                     ext_list_tmp->data.logical <
 626                     ext->data.logical + ext->data.len)
 627                         /* Overlap */
 628                         goto out;
 629         }
 630         ext_list_tmp = ext_list_tmp->prev;
 631         /* Insert "ext" after "ext_list_tmp" */
 632         insert(ext_list_tmp, ext);
 633         return 0;
 634 out:
 635         errno = EINVAL;
 636         return -1;
 637 }
 638
 639 /*
 640  * insert_extent_by_physical() -        Sequentially insert extent by physical.
 641  *
 642  * @ext_list_head:      the head of physical extent list.
 643  * @ext:                the extent element which will be inserted.
 644  */
 645 static int insert_extent_by_physical(struct fiemap_extent_list **ext_list_head,
 646                         struct fiemap_extent_list *ext)
 647 {
 648         struct fiemap_extent_list       *ext_list_tmp = *ext_list_head;
 649
 650         if (ext == NULL)
 651                 goto out;
 652
 653         /* First element */
 654         if (*ext_list_head == NULL) {
 655                 (*ext_list_head) = ext;
 656                 (*ext_list_head)->prev = *ext_list_head;
 657                 (*ext_list_head)->next = *ext_list_head;
 658                 return 0;
 659         }
 660
 661         if (ext->data.physical <= ext_list_tmp->data.physical) {
 662                 /* Insert before head */
 663                 if (ext_list_tmp->data.physical <
 664                                         ext->data.physical + ext->data.len)
 665                         /* Overlap */
 666                         goto out;
 667                 /* Adjust head */
 668                 *ext_list_head = ext;
 669         } else {
 670                 /* Insert into the middle or last of the list */
 671                 do {
 672                         if (ext->data.physical < ext_list_tmp->data.physical)
 673                                 break;
 674                         ext_list_tmp = ext_list_tmp->next;
 675                 } while (ext_list_tmp != (*ext_list_head));
 676                 if (ext->data.physical <
 677                     ext_list_tmp->prev->data.physical +
 678                                 ext_list_tmp->prev->data.len)
 679                         /* Overlap */
 680                         goto out;
 681
 682                 if (ext_list_tmp != *ext_list_head &&
 683                     ext_list_tmp->data.physical <
 684                                 ext->data.physical + ext->data.len)
 685                         /* Overlap */
 686                         goto out;
 687         }
 688         ext_list_tmp = ext_list_tmp->prev;
 689         /* Insert "ext" after "ext_list_tmp" */
 690         insert(ext_list_tmp, ext);
 691         return 0;
 692 out:
 693         errno = EINVAL;
 694         return -1;
 695 }
 696
 697 /*
 698  * insert_exts_group() -        Insert a exts_group.
 699  *
 700  * @ext_group_head:             the head of a exts_group list.
 701  * @exts_group:                 the exts_group element which will be inserted.
 702  */
 703 static int insert_exts_group(struct fiemap_extent_group **ext_group_head,
 704                                 struct fiemap_extent_group *exts_group)
 705 {
 706         struct fiemap_extent_group      *ext_group_tmp = NULL;
 707
 708         if (exts_group == NULL) {
 709                 errno = EINVAL;
 710                 return -1;
 711         }
 712
 713         /* Initialize list */
 714         if (*ext_group_head == NULL) {
 715                 (*ext_group_head) = exts_group;
 716                 (*ext_group_head)->prev = *ext_group_head;
 717                 (*ext_group_head)->next = *ext_group_head;
 718                 return 0;
 719         }
 720
 721         ext_group_tmp = (*ext_group_head)->prev;
 722         insert(ext_group_tmp, exts_group);
 723
 724         return 0;
 725 }
 726
 727 /*
 728  * join_extents() -             Find continuous region(exts_group).
 729  *
 730  * @ext_list_head:              the head of the extent list.
 731  * @ext_group_head:             the head of the target exts_group list.
 732  */
 733 static int join_extents(struct fiemap_extent_list *ext_list_head,
 734                 struct fiemap_extent_group **ext_group_head)
 735 {
 736         __u64   len = ext_list_head->data.len;
 737         struct fiemap_extent_list *ext_list_start = ext_list_head;
 738         struct fiemap_extent_list *ext_list_tmp = ext_list_head->next;
 739
 740         do {
 741                 struct fiemap_extent_group      *ext_group_tmp = NULL;
 742
 743                 /* This extent and previous extent are not continuous,
 744                  * so, all previous extents are treated as an extent group.
 745                  */
 746                 if ((ext_list_tmp->prev->data.logical +
 747                         ext_list_tmp->prev->data.len)
 748                                 != ext_list_tmp->data.logical) {
 749                         ext_group_tmp =
 750                                 malloc(sizeof(struct fiemap_extent_group));
 751                         if (ext_group_tmp == NULL)
 752                                 return -1;
 753
 754                         memset(ext_group_tmp, 0,
 755                                 sizeof(struct fiemap_extent_group));
 756                         ext_group_tmp->len = len;
 757                         ext_group_tmp->start = ext_list_start;
 758                         ext_group_tmp->end = ext_list_tmp->prev;
 759
 760                         if (insert_exts_group(ext_group_head,
 761                                 ext_group_tmp) < 0) {
 762                                 FREE(ext_group_tmp);
 763                                 return -1;
 764                         }
 765                         ext_list_start = ext_list_tmp;
 766                         len = ext_list_tmp->data.len;
 767                         ext_list_tmp = ext_list_tmp->next;
 768                         continue;
 769                 }
 770
 771                 /* This extent and previous extent are continuous,
 772                  * so, they belong to the same extent group, and we check
 773                  * if the next extent belongs to the same extent group.
 774                  */
 775                 len += ext_list_tmp->data.len;
 776                 ext_list_tmp = ext_list_tmp->next;
 777         } while (ext_list_tmp != ext_list_head->next);
 778
 779         return 0;
 780 }
 781
 782 /*
 783  * get_file_extents() - Get file's extent list.
 784  *
 785  * @fd:                 defrag target file's descriptor.
 786  * @ext_list_head:      the head of the extent list.
 787  */
 788 static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
 789 {
 790         __u32   i;
 791         int     ret;
 792         int     ext_buf_size, fie_buf_size;
 793         __u64   pos = 0;
 794         struct fiemap   *fiemap_buf = NULL;
 795         struct fiemap_extent    *ext_buf = NULL;
 796         struct fiemap_extent_list       *ext_list = NULL;
 797
 798         /* Convert units, in bytes.
 799          * Be careful : now, physical block number in extent is 48bit,
 800          * and the maximum blocksize for ext4 is 4K(12bit),
 801          * so there is no overflow, but in future it may be changed.
 802          */
 803
 804         /* Alloc space for fiemap */
 805         ext_buf_size = EXTENT_MAX_COUNT * sizeof(struct fiemap_extent);
 806         fie_buf_size = sizeof(struct fiemap) + ext_buf_size;
 807
 808         fiemap_buf = malloc(fie_buf_size);
 809         if (fiemap_buf == NULL)
 810                 return -1;
 811
 812         ext_buf = fiemap_buf->fm_extents;
 813         memset(fiemap_buf, 0, fie_buf_size);
 814         fiemap_buf->fm_length = FIEMAP_MAX_OFFSET;
 815         fiemap_buf->fm_flags |= FIEMAP_FLAG_SYNC;
 816         fiemap_buf->fm_extent_count = EXTENT_MAX_COUNT;
 817
 818         do {
 819                 fiemap_buf->fm_start = pos;
 820                 memset(ext_buf, 0, ext_buf_size);
 821                 ret = ioctl(fd, FS_IOC_FIEMAP, fiemap_buf);
 822                 if (ret < 0 || fiemap_buf->fm_mapped_extents == 0)
 823                         goto out;
 824                 for (i = 0; i < fiemap_buf->fm_mapped_extents; i++) {
 825                         ext_list = NULL;
 826                         ext_list = malloc(sizeof(struct fiemap_extent_list));
 827                         if (ext_list == NULL)
 828                                 goto out;
 829
 830                         ext_list->data.physical = ext_buf[i].fe_physical
 831                                                 / block_size;
 832                         ext_list->data.logical = ext_buf[i].fe_logical
 833                                                 / block_size;
 834                         ext_list->data.len = ext_buf[i].fe_length
 835                                                 / block_size;
 836
 837                         ret = insert_extent_by_physical(
 838                                         ext_list_head, ext_list);
 839                         if (ret < 0) {
 840                                 FREE(ext_list);
 841                                 goto out;
 842                         }
 843                 }
 844                 /* Record file's logical offset this time */
 845                 pos = ext_buf[EXTENT_MAX_COUNT-1].fe_logical +
 846                         ext_buf[EXTENT_MAX_COUNT-1].fe_length;
 847                 /*
 848                  * If fm_extents array has been filled and
 849                  * there are extents left, continue to cycle.
 850                  */
 851         } while (fiemap_buf->fm_mapped_extents
 852                                         == EXTENT_MAX_COUNT &&
 853                 !(ext_buf[EXTENT_MAX_COUNT-1].fe_flags
 854                                         & FIEMAP_EXTENT_LAST));
 855
 856         FREE(fiemap_buf);
 857         return 0;
 858 out:
 859         FREE(fiemap_buf);
 860         return -1;
 861 }
 862
 863 /*
 864  * get_logical_count() -        Get the file logical extents count.
 865  *
 866  * @logical_list_head:  the head of the logical extent list.
 867  */
 868 static int get_logical_count(struct fiemap_extent_list *logical_list_head)
 869 {
 870         int ret = 0;
 871         struct fiemap_extent_list *ext_list_tmp  = logical_list_head;
 872
 873         do {
 874                 ret++;
 875                 ext_list_tmp = ext_list_tmp->next;
 876         } while (ext_list_tmp != logical_list_head);
 877
 878         return ret;
 879 }
 880
 881 /*
 882  * get_physical_count() -       Get the file physical extents count.
 883  *
 884  * @physical_list_head: the head of the physical extent list.
 885  */
 886 static int get_physical_count(struct fiemap_extent_list *physical_list_head)
 887 {
 888         int ret = 0;
 889         struct fiemap_extent_list *ext_list_tmp = physical_list_head;
 890
 891         do {
 892                 if ((ext_list_tmp->data.physical + ext_list_tmp->data.len)
 893                                 != ext_list_tmp->next->data.physical ||
 894                     (ext_list_tmp->data.logical + ext_list_tmp->data.len)
 895                                 != ext_list_tmp->next->data.logical) {
 896                         /* This extent and next extent are not continuous. */
 897                         ret++;
 898                 }
 899
 900                 ext_list_tmp = ext_list_tmp->next;
 901         } while (ext_list_tmp != physical_list_head);
 902
 903         return ret;
 904 }
 905
 906 /*
 907  * change_physical_to_logical() -       Change list from physical to logical.
 908  *
 909  * @physical_list_head: the head of physical extent list.
 910  * @logical_list_head:  the head of logical extent list.
 911  */
 912 static int change_physical_to_logical(
 913                         struct fiemap_extent_list **physical_list_head,
 914                         struct fiemap_extent_list **logical_list_head)
 915 {
 916         int ret;
 917         struct fiemap_extent_list *ext_list_tmp = *physical_list_head;
 918         struct fiemap_extent_list *ext_list_next = ext_list_tmp->next;
 919
 920         while (1) {
 921                 if (ext_list_tmp == ext_list_next) {
 922                         ret = insert_extent_by_logical(
 923                                 logical_list_head, ext_list_tmp);
 924                         if (ret < 0)
 925                                 return -1;
 926
 927                         *physical_list_head = NULL;
 928                         break;
 929                 }
 930
 931                 ext_list_tmp->prev->next = ext_list_tmp->next;
 932                 ext_list_tmp->next->prev = ext_list_tmp->prev;
 933                 *physical_list_head = ext_list_next;
 934
 935                 ret = insert_extent_by_logical(
 936                         logical_list_head, ext_list_tmp);
 937                 if (ret < 0) {
 938                         FREE(ext_list_tmp);
 939                         return -1;
 940                 }
 941                 ext_list_tmp = ext_list_next;
 942                 ext_list_next = ext_list_next->next;
 943         }
 944
 945         return 0;
 946 }
 947
 948 /* get_file_blocks() -  Get total file blocks.
 949  *
 950  * @ext_list_head:      the extent list head of the target file
 951  */
 952 static ext4_fsblk_t get_file_blocks(struct fiemap_extent_list *ext_list_head)
 953 {
 954         ext4_fsblk_t blk_count = 0;
 955         struct fiemap_extent_list *ext_list_tmp = ext_list_head;
 956
 957         do {
 958                 blk_count += ext_list_tmp->data.len;
 959                 ext_list_tmp = ext_list_tmp->next;
 960         } while (ext_list_tmp != ext_list_head);
 961
 962         return blk_count;
 963 }
 964
 965 /*
 966  * free_ext() -         Free the extent list.
 967  *
 968  * @ext_list_head:      the extent list head of which will be free.
 969  */
 970 static void free_ext(struct fiemap_extent_list *ext_list_head)
 971 {
 972         struct fiemap_extent_list       *ext_list_tmp = NULL;
 973
 974         if (ext_list_head == NULL)
 975                 return;
 976
 977         while (ext_list_head->next != ext_list_head) {
 978                 ext_list_tmp = ext_list_head;
 979                 ext_list_head->prev->next = ext_list_head->next;
 980                 ext_list_head->next->prev = ext_list_head->prev;
 981                 ext_list_head = ext_list_head->next;
 982                 free(ext_list_tmp);
 983         }
 984         free(ext_list_head);
 985 }
 986
 987 /*
 988  * free_exts_group() -          Free the exts_group.
 989  *
 990  * @*ext_group_head:    the exts_group list head which will be free.
 991  */
 992 static void free_exts_group(struct fiemap_extent_group *ext_group_head)
 993 {
 994         struct fiemap_extent_group      *ext_group_tmp = NULL;
 995
 996         if (ext_group_head == NULL)
 997                 return;
 998
 999         while (ext_group_head->next != ext_group_head) {
1000                 ext_group_tmp = ext_group_head;
1001                 ext_group_head->prev->next = ext_group_head->next;
1002                 ext_group_head->next->prev = ext_group_head->prev;
1003                 ext_group_head = ext_group_head->next;
1004                 free(ext_group_tmp);
1005         }
1006         free(ext_group_head);
1007 }
1008
1009 /*
1010  * get_best_count() -   Get the file best extents count.
1011  *
1012  * @block_count:                the file's physical block count.
1013  */
1014 static int get_best_count(ext4_fsblk_t block_count)
1015 {
1016         int ret;
1017         unsigned int flex_bg_num;
1018
1019         /* Calculate best extents count */
1020         if (feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
1021                 flex_bg_num = 1 << log_groups_per_flex;
1022                 ret = ((block_count - 1) /
1023                         ((ext4_fsblk_t)blocks_per_group *
1024                                 flex_bg_num)) + 1;
1025         } else
1026                 ret = ((block_count - 1) / blocks_per_group) + 1;
1027
1028         return ret;
1029 }
1030
1031
1032 /*
1033  * file_statistic() -   Get statistic info of the file's fragments.
1034  *
1035  * @file:               the file's name.
1036  * @buf:                the pointer of the struct stat64.
1037  * @flag:               file type.
1038  * @ftwbuf:             the pointer of a struct FTW.
1039  */
1040 static int file_statistic(const char *file, const struct stat64 *buf,
1041                         int flag EXT2FS_ATTR((unused)),
1042                         struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1043 {
1044         int     fd;
1045         int     ret;
1046         int     now_ext_count, best_ext_count = 0, physical_ext_count;
1047         int     i, j;
1048         __u64   size_per_ext = 0;
1049         float   ratio = 0.0;
1050         ext4_fsblk_t    blk_count = 0;
1051         char    msg_buffer[PATH_MAX + 24];
1052         struct fiemap_extent_list *physical_list_head = NULL;
1053         struct fiemap_extent_list *logical_list_head = NULL;
1054
1055         defraged_file_count++;
1056
1057         if (mode_flag & DETAIL) {
1058                 if (total_count == 1 && regular_count == 1)
1059                         printf("<File>\n");
1060                 else {
1061                         printf("[%u/%u]", defraged_file_count, total_count);
1062                         fflush(stdout);
1063                 }
1064         }
1065         if (lost_found_dir[0] != '\0' &&
1066             !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1067                 if (mode_flag & DETAIL) {
1068                         PRINT_FILE_NAME(file);
1069                         STATISTIC_ERR_MSG(NGMSG_LOST_FOUND);
1070                 }
1071                         return 0;
1072         }
1073
1074         if (!S_ISREG(buf->st_mode)) {
1075                 if (mode_flag & DETAIL) {
1076                         PRINT_FILE_NAME(file);
1077                         STATISTIC_ERR_MSG(NGMSG_FILE_UNREG);
1078                 }
1079                 return 0;
1080         }
1081
1082         /* Access authority */
1083         if (current_uid != ROOT_UID &&
1084                 buf->st_uid != current_uid) {
1085                 if (mode_flag & DETAIL) {
1086                         PRINT_FILE_NAME(file);
1087                         STATISTIC_ERR_MSG(
1088                                 "File is not current user's file"
1089                                 " or current user is not root");
1090                 }
1091                 return 0;
1092         }
1093
1094         /* Empty file */
1095         if (buf->st_size == 0) {
1096                 if (mode_flag & DETAIL) {
1097                         PRINT_FILE_NAME(file);
1098                         STATISTIC_ERR_MSG("File size is 0");
1099                 }
1100                 return 0;
1101         }
1102
1103         /* Has no blocks */
1104         if (buf->st_blocks == 0) {
1105                 if (mode_flag & DETAIL) {
1106                         PRINT_FILE_NAME(file);
1107                         STATISTIC_ERR_MSG("File has no blocks");
1108                 }
1109                 return 0;
1110         }
1111
1112         fd = open64(file, O_RDONLY);
1113         if (fd < 0) {
1114                 if (mode_flag & DETAIL) {
1115                         PRINT_FILE_NAME(file);
1116                         STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1117                 }
1118                 return 0;
1119         }
1120
1121         /* Get file's physical extents  */
1122         ret = get_file_extents(fd, &physical_list_head);
1123         if (ret < 0) {
1124                 if (mode_flag & DETAIL) {
1125                         PRINT_FILE_NAME(file);
1126                         STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1127                 }
1128                 goto out;
1129         }
1130
1131         /* Get the count of file's continuous physical region */
1132         physical_ext_count = get_physical_count(physical_list_head);
1133
1134         /* Change list from physical to logical */
1135         ret = change_physical_to_logical(&physical_list_head,
1136                                                         &logical_list_head);
1137         if (ret < 0) {
1138                 if (mode_flag & DETAIL) {
1139                         PRINT_FILE_NAME(file);
1140                         STATISTIC_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1141                 }
1142                 goto out;
1143         }
1144
1145         /* Count file fragments before defrag */
1146         now_ext_count = get_logical_count(logical_list_head);
1147
1148         if (current_uid == ROOT_UID) {
1149                 /* Calculate the size per extent */
1150                 blk_count = get_file_blocks(logical_list_head);
1151
1152                 best_ext_count = get_best_count(blk_count);
1153
1154                 /* e4defrag rounds size_per_ext up to a block size boundary */
1155                 size_per_ext = blk_count * (buf->st_blksize / 1024) /
1156                                                         now_ext_count;
1157
1158                 ratio = (float)(physical_ext_count - best_ext_count) * 100 /
1159                                                         blk_count;
1160
1161                 extents_before_defrag += now_ext_count;
1162                 extents_after_defrag += best_ext_count;
1163                 files_block_count += blk_count;
1164         }
1165
1166         if (total_count == 1 && regular_count == 1) {
1167                 /* File only */
1168                 if (mode_flag & DETAIL) {
1169                         int count = 0;
1170                         struct fiemap_extent_list *ext_list_tmp =
1171                                                 logical_list_head;
1172
1173                         /* Print extents info */
1174                         do {
1175                                 count++;
1176                                 printf("[ext %d]:\tstart %llu:\tlogical "
1177                                                 "%llu:\tlen %llu\n", count,
1178                                                 ext_list_tmp->data.physical,
1179                                                 ext_list_tmp->data.logical,
1180                                                 ext_list_tmp->data.len);
1181                                 ext_list_tmp = ext_list_tmp->next;
1182                         } while (ext_list_tmp != logical_list_head);
1183
1184                 } else {
1185                         printf("%-40s%10s/%-10s%9s\n",
1186                                         "<File>", "now", "best", "size/ext");
1187                         if (current_uid == ROOT_UID) {
1188                                 if (strlen(file) > 40)
1189                                         printf("%s\n%50d/%-10d%6llu KB\n",
1190                                                 file, now_ext_count,
1191                                                 best_ext_count, size_per_ext);
1192                                 else
1193                                         printf("%-40s%10d/%-10d%6llu KB\n",
1194                                                 file, now_ext_count,
1195                                                 best_ext_count, size_per_ext);
1196                         } else {
1197                                 if (strlen(file) > 40)
1198                                         printf("%s\n%50d/%-10s%7s\n",
1199                                                         file, now_ext_count,
1200                                                         "-", "-");
1201                                 else
1202                                         printf("%-40s%10d/%-10s%7s\n",
1203                                                         file, now_ext_count,
1204                                                         "-", "-");
1205                         }
1206                 }
1207                 succeed_cnt++;
1208                 goto out;
1209         }
1210
1211         if (mode_flag & DETAIL) {
1212                 /* Print statistic info */
1213                 sprintf(msg_buffer, "[%u/%u]%s",
1214                                 defraged_file_count, total_count, file);
1215                 if (current_uid == ROOT_UID) {
1216                         if (strlen(msg_buffer) > 40)
1217                                 printf("\033[79;0H\033[K%s\n"
1218                                                 "%50d/%-10d%6llu KB\n",
1219                                                 msg_buffer, now_ext_count,
1220                                                 best_ext_count, size_per_ext);
1221                         else
1222                                 printf("\033[79;0H\033[K%-40s"
1223                                                 "%10d/%-10d%6llu KB\n",
1224                                                 msg_buffer, now_ext_count,
1225                                                 best_ext_count, size_per_ext);
1226                 } else {
1227                         if (strlen(msg_buffer) > 40)
1228                                 printf("\033[79;0H\033[K%s\n%50d/%-10s%7s\n",
1229                                                 msg_buffer, now_ext_count,
1230                                                         "-", "-");
1231                         else
1232                                 printf("\033[79;0H\033[K%-40s%10d/%-10s%7s\n",
1233                                                 msg_buffer, now_ext_count,
1234                                                         "-", "-");
1235                 }
1236         }
1237
1238         for (i = 0; i < SHOW_FRAG_FILES; i++) {
1239                 if (ratio >= frag_rank[i].ratio) {
1240                         for (j = SHOW_FRAG_FILES - 1; j > i; j--) {
1241                                 memset(&frag_rank[j], 0,
1242                                         sizeof(struct frag_statistic_ino));
1243                                 strncpy(frag_rank[j].msg_buffer,
1244                                         frag_rank[j - 1].msg_buffer,
1245                                         strnlen(frag_rank[j - 1].msg_buffer,
1246                                         PATH_MAX));
1247                                 frag_rank[j].now_count =
1248                                         frag_rank[j - 1].now_count;
1249                                 frag_rank[j].best_count =
1250                                         frag_rank[j - 1].best_count;
1251                                 frag_rank[j].size_per_ext =
1252                                         frag_rank[j - 1].size_per_ext;
1253                                 frag_rank[j].ratio =
1254                                         frag_rank[j - 1].ratio;
1255                         }
1256                         memset(&frag_rank[i], 0,
1257                                         sizeof(struct frag_statistic_ino));
1258                         strncpy(frag_rank[i].msg_buffer, file,
1259                                                 strnlen(file, PATH_MAX));
1260                         frag_rank[i].now_count = now_ext_count;
1261                         frag_rank[i].best_count = best_ext_count;
1262                         frag_rank[i].size_per_ext = size_per_ext;
1263                         frag_rank[i].ratio = ratio;
1264                         break;
1265                 }
1266         }
1267
1268         succeed_cnt++;
1269
1270 out:
1271         close(fd);
1272         free_ext(physical_list_head);
1273         free_ext(logical_list_head);
1274         return 0;
1275 }
1276
1277 /*
1278  * print_progress -     Print defrag progress
1279  *
1280  * @file:               file name.
1281  * @start:              logical offset for defrag target file
1282  * @file_size:          defrag target filesize
1283  */
1284 static void print_progress(const char *file, loff_t start, loff_t file_size)
1285 {
1286         int percent = (start * 100) / file_size;
1287         printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1288                 defraged_file_count, total_count, file, min(percent, 100));
1289         fflush(stdout);
1290
1291         return;
1292 }
1293
1294 /*
1295  * call_defrag() -      Execute the defrag program.
1296  *
1297  * @fd:                 target file descriptor.
1298  * @donor_fd:           donor file descriptor.
1299  * @file:                       target file name.
1300  * @buf:                        pointer of the struct stat64.
1301  * @ext_list_head:      head of the extent list.
1302  */
1303 static int call_defrag(int fd, int donor_fd, const char *file,
1304         const struct stat64 *buf, struct fiemap_extent_list *ext_list_head)
1305 {
1306         loff_t  start = 0;
1307         unsigned int    page_num;
1308         unsigned char   *vec = NULL;
1309         int     defraged_ret = 0;
1310         int     ret;
1311         struct move_extent      move_data;
1312         struct fiemap_extent_list       *ext_list_tmp = NULL;
1313
1314         memset(&move_data, 0, sizeof(struct move_extent));
1315         move_data.donor_fd = donor_fd;
1316
1317         /* Print defrag progress */
1318         print_progress(file, start, buf->st_size);
1319
1320         ext_list_tmp = ext_list_head;
1321         do {
1322                 move_data.orig_start = ext_list_tmp->data.logical;
1323                 /* Logical offset of orig and donor should be same */
1324                 move_data.donor_start = move_data.orig_start;
1325                 move_data.len = ext_list_tmp->data.len;
1326                 move_data.moved_len = 0;
1327
1328                 ret = page_in_core(fd, move_data, &vec, &page_num);
1329                 if (ret < 0) {
1330                         if (mode_flag & DETAIL) {
1331                                 printf("\n");
1332                                 PRINT_ERR_MSG_WITH_ERRNO(
1333                                                 "Failed to get file map");
1334                         } else {
1335                                 printf("\t[ NG ]\n");
1336                         }
1337                         return -1;
1338                 }
1339
1340                 /* EXT4_IOC_MOVE_EXT */
1341                 defraged_ret =
1342                         ioctl(fd, EXT4_IOC_MOVE_EXT, &move_data);
1343
1344                 /* Free pages */
1345                 ret = defrag_fadvise(fd, move_data, vec, page_num);
1346                 if (vec) {
1347                         free(vec);
1348                         vec = NULL;
1349                 }
1350                 if (ret < 0) {
1351                         if (mode_flag & DETAIL) {
1352                                 printf("\n");
1353                                 PRINT_ERR_MSG_WITH_ERRNO(
1354                                         "Failed to free page");
1355                         } else {
1356                                 printf("\t[ NG ]\n");
1357                         }
1358                         return -1;
1359                 }
1360
1361                 if (defraged_ret < 0) {
1362                         if (mode_flag & DETAIL) {
1363                                 printf("\n");
1364                                 PRINT_ERR_MSG_WITH_ERRNO(
1365                                         "Failed to defrag with "
1366                                         "EXT4_IOC_MOVE_EXT ioctl");
1367                                 if (errno == ENOTTY)
1368                                         printf("\tAt least 2.6.31-rc1 of "
1369                                                 "vanilla kernel is required\n");
1370                         } else {
1371                                 printf("\t[ NG ]\n");
1372                         }
1373                         return -1;
1374                 }
1375                 /* Adjust logical offset for next ioctl */
1376                 move_data.orig_start += move_data.moved_len;
1377                 move_data.donor_start = move_data.orig_start;
1378
1379                 start = move_data.orig_start * buf->st_blksize;
1380
1381                 /* Print defrag progress */
1382                 print_progress(file, start, buf->st_size);
1383
1384                 /* End of file */
1385                 if (start >= buf->st_size)
1386                         break;
1387
1388                 ext_list_tmp = ext_list_tmp->next;
1389         } while (ext_list_tmp != ext_list_head);
1390
1391         return 0;
1392 }
1393
1394 /*
1395  * file_defrag() -              Check file attributes and call ioctl to defrag.
1396  *
1397  * @file:               the file's name.
1398  * @buf:                the pointer of the struct stat64.
1399  * @flag:               file type.
1400  * @ftwbuf:             the pointer of a struct FTW.
1401  */
1402 static int file_defrag(const char *file, const struct stat64 *buf,
1403                         int flag EXT2FS_ATTR((unused)),
1404                         struct FTW *ftwbuf EXT2FS_ATTR((unused)))
1405 {
1406         int     fd;
1407         int     donor_fd = -1;
1408         int     ret;
1409         int     best;
1410         int     file_frags_start, file_frags_end;
1411         int     orig_physical_cnt, donor_physical_cnt = 0;
1412         char    tmp_inode_name[PATH_MAX + 8];
1413         ext4_fsblk_t                    blk_count = 0;
1414         struct fiemap_extent_list       *orig_list_physical = NULL;
1415         struct fiemap_extent_list       *orig_list_logical = NULL;
1416         struct fiemap_extent_list       *donor_list_physical = NULL;
1417         struct fiemap_extent_list       *donor_list_logical = NULL;
1418         struct fiemap_extent_group      *orig_group_head = NULL;
1419         struct fiemap_extent_group      *orig_group_tmp = NULL;
1420
1421         defraged_file_count++;
1422
1423         if (mode_flag & DETAIL) {
1424                 printf("[%u/%u]", defraged_file_count, total_count);
1425                 fflush(stdout);
1426         }
1427
1428         if (lost_found_dir[0] != '\0' &&
1429             !memcmp(file, lost_found_dir, strnlen(lost_found_dir, PATH_MAX))) {
1430                 if (mode_flag & DETAIL) {
1431                         PRINT_FILE_NAME(file);
1432                         IN_FTW_PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1433                 }
1434                 return 0;
1435         }
1436
1437         if (!S_ISREG(buf->st_mode)) {
1438                 if (mode_flag & DETAIL) {
1439                         PRINT_FILE_NAME(file);
1440                         IN_FTW_PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1441                 }
1442                 return 0;
1443         }
1444
1445         /* Empty file */
1446         if (buf->st_size == 0) {
1447                 if (mode_flag & DETAIL) {
1448                         PRINT_FILE_NAME(file);
1449                         IN_FTW_PRINT_ERR_MSG("File size is 0");
1450                 }
1451                 return 0;
1452         }
1453
1454         /* Has no blocks */
1455         if (buf->st_blocks == 0) {
1456                 if (mode_flag & DETAIL) {
1457                         PRINT_FILE_NAME(file);
1458                         STATISTIC_ERR_MSG("File has no blocks");
1459                 }
1460                 return 0;
1461         }
1462
1463         fd = open64(file, O_RDWR);
1464         if (fd < 0) {
1465                 if (mode_flag & DETAIL) {
1466                         PRINT_FILE_NAME(file);
1467                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1468                 }
1469                 return 0;
1470         }
1471
1472         /* Get file's extents */
1473         ret = get_file_extents(fd, &orig_list_physical);
1474         if (ret < 0) {
1475                 if (mode_flag & DETAIL) {
1476                         PRINT_FILE_NAME(file);
1477                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1478                 }
1479                 goto out;
1480         }
1481
1482         /* Get the count of file's continuous physical region */
1483         orig_physical_cnt = get_physical_count(orig_list_physical);
1484
1485         /* Change list from physical to logical */
1486         ret = change_physical_to_logical(&orig_list_physical,
1487                                                         &orig_list_logical);
1488         if (ret < 0) {
1489                 if (mode_flag & DETAIL) {
1490                         PRINT_FILE_NAME(file);
1491                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1492                 }
1493                 goto out;
1494         }
1495
1496         /* Count file fragments before defrag */
1497         file_frags_start = get_logical_count(orig_list_logical);
1498
1499         blk_count = get_file_blocks(orig_list_logical);
1500         if (file_check(fd, buf, file, file_frags_start, blk_count) < 0)
1501                 goto out;
1502
1503         if (fsync(fd) < 0) {
1504                 if (mode_flag & DETAIL) {
1505                         PRINT_FILE_NAME(file);
1506                         PRINT_ERR_MSG_WITH_ERRNO("Failed to sync(fsync)");
1507                 }
1508                 goto out;
1509         }
1510
1511         if (current_uid == ROOT_UID)
1512                 best = get_best_count(blk_count);
1513         else
1514                 best = 1;
1515
1516         if (file_frags_start <= best)
1517                 goto check_improvement;
1518
1519         /* Combine extents to group */
1520         ret = join_extents(orig_list_logical, &orig_group_head);
1521         if (ret < 0) {
1522                 if (mode_flag & DETAIL) {
1523                         PRINT_FILE_NAME(file);
1524                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1525                 }
1526                 goto out;
1527         }
1528
1529         /* Create donor inode */
1530         memset(tmp_inode_name, 0, PATH_MAX + 8);
1531         sprintf(tmp_inode_name, "%.*s.defrag",
1532                                 (int)strnlen(file, PATH_MAX), file);
1533         donor_fd = open64(tmp_inode_name, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR);
1534         if (donor_fd < 0) {
1535                 if (mode_flag & DETAIL) {
1536                         PRINT_FILE_NAME(file);
1537                         if (errno == EEXIST)
1538                                 PRINT_ERR_MSG_WITH_ERRNO(
1539                                 "File is being defraged by other program");
1540                         else
1541                                 PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_OPEN);
1542                 }
1543                 goto out;
1544         }
1545
1546         /* Unlink donor inode */
1547         ret = unlink(tmp_inode_name);
1548         if (ret < 0) {
1549                 if (mode_flag & DETAIL) {
1550                         PRINT_FILE_NAME(file);
1551                         PRINT_ERR_MSG_WITH_ERRNO("Failed to unlink");
1552                 }
1553                 goto out;
1554         }
1555
1556         /* Allocate space for donor inode */
1557         orig_group_tmp = orig_group_head;
1558         do {
1559                 ret = fallocate64(donor_fd, 0,
1560                   (loff_t)orig_group_tmp->start->data.logical * block_size,
1561                   (loff_t)orig_group_tmp->len * block_size);
1562                 if (ret < 0) {
1563                         if (mode_flag & DETAIL) {
1564                                 PRINT_FILE_NAME(file);
1565                                 PRINT_ERR_MSG_WITH_ERRNO("Failed to fallocate");
1566                         }
1567                         goto out;
1568                 }
1569
1570                 orig_group_tmp = orig_group_tmp->next;
1571         } while (orig_group_tmp != orig_group_head);
1572
1573         /* Get donor inode's extents */
1574         ret = get_file_extents(donor_fd, &donor_list_physical);
1575         if (ret < 0) {
1576                 if (mode_flag & DETAIL) {
1577                         PRINT_FILE_NAME(file);
1578                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1579                 }
1580                 goto out;
1581         }
1582
1583         /* Calculate donor inode's continuous physical region */
1584         donor_physical_cnt = get_physical_count(donor_list_physical);
1585
1586         /* Change donor extent list from physical to logical */
1587         ret = change_physical_to_logical(&donor_list_physical,
1588                                                         &donor_list_logical);
1589         if (ret < 0) {
1590                 if (mode_flag & DETAIL) {
1591                         PRINT_FILE_NAME(file);
1592                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_EXTENT);
1593                 }
1594                 goto out;
1595         }
1596
1597 check_improvement:
1598         if (mode_flag & DETAIL) {
1599                 if (file_frags_start != 1)
1600                         frag_files_before_defrag++;
1601
1602                 extents_before_defrag += file_frags_start;
1603         }
1604
1605         if (file_frags_start <= best ||
1606                         orig_physical_cnt <= donor_physical_cnt) {
1607                 printf("\033[79;0H\033[K[%u/%u]%s:\t%3d%%",
1608                         defraged_file_count, total_count, file, 100);
1609                 if (mode_flag & DETAIL)
1610                         printf("  extents: %d -> %d",
1611                                 file_frags_start, file_frags_start);
1612
1613                 printf("\t[ OK ]\n");
1614                 succeed_cnt++;
1615
1616                 if (file_frags_start != 1)
1617                         frag_files_after_defrag++;
1618
1619                 extents_after_defrag += file_frags_start;
1620                 goto out;
1621         }
1622
1623         /* Defrag the file */
1624         ret = call_defrag(fd, donor_fd, file, buf, donor_list_logical);
1625
1626         /* Count file fragments after defrag and print extents info */
1627         if (mode_flag & DETAIL) {
1628                 file_frags_end = file_frag_count(fd);
1629                 if (file_frags_end < 0) {
1630                         printf("\n");
1631                         PRINT_ERR_MSG_WITH_ERRNO(NGMSG_FILE_INFO);
1632                         goto out;
1633                 }
1634
1635                 if (file_frags_end != 1)
1636                         frag_files_after_defrag++;
1637
1638                 extents_after_defrag += file_frags_end;
1639
1640                 if (ret < 0)
1641                         goto out;
1642
1643                 printf("  extents: %d -> %d",
1644                         file_frags_start, file_frags_end);
1645                 fflush(stdout);
1646         }
1647
1648         if (ret < 0)
1649                 goto out;
1650
1651         printf("\t[ OK ]\n");
1652         fflush(stdout);
1653         succeed_cnt++;
1654
1655 out:
1656         close(fd);
1657         if (donor_fd != -1)
1658                 close(donor_fd);
1659         free_ext(orig_list_physical);
1660         free_ext(orig_list_logical);
1661         free_ext(donor_list_physical);
1662         free_exts_group(orig_group_head);
1663         return 0;
1664 }
1665
1666 /*
1667  * main() -             Ext4 online defrag.
1668  *
1669  * @argc:               the number of parameter.
1670  * @argv[]:             the pointer array of parameter.
1671  */
1672 int main(int argc, char *argv[])
1673 {
1674         int     opt;
1675         int     i, j, ret = 0;
1676         int     flags = FTW_PHYS | FTW_MOUNT;
1677         int     arg_type = -1;
1678         int     mount_dir_len = 0;
1679         int     success_flag = 0;
1680         char    dir_name[PATH_MAX + 1];
1681         char    dev_name[PATH_MAX + 1];
1682         struct stat64   buf;
1683         ext2_filsys fs = NULL;
1684
1685         printf("e4defrag %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
1686
1687         /* Parse arguments */
1688         if (argc == 1)
1689                 goto out;
1690
1691         while ((opt = getopt(argc, argv, "vc")) != EOF) {
1692                 switch (opt) {
1693                 case 'v':
1694                         mode_flag |= DETAIL;
1695                         break;
1696                 case 'c':
1697                         mode_flag |= STATISTIC;
1698                         break;
1699                 default:
1700                         goto out;
1701                 }
1702         }
1703
1704         if (argc == optind)
1705                 goto out;
1706
1707         current_uid = getuid();
1708
1709         /* Main process */
1710         for (i = optind; i < argc; i++) {
1711                 succeed_cnt = 0;
1712                 regular_count = 0;
1713                 total_count = 0;
1714                 frag_files_before_defrag = 0;
1715                 frag_files_after_defrag = 0;
1716                 extents_before_defrag = 0;
1717                 extents_after_defrag = 0;
1718                 defraged_file_count = 0;
1719                 files_block_count = 0;
1720                 blocks_per_group = 0;
1721                 feature_incompat = 0;
1722                 log_groups_per_flex = 0;
1723
1724                 memset(dir_name, 0, PATH_MAX + 1);
1725                 memset(dev_name, 0, PATH_MAX + 1);
1726                 memset(lost_found_dir, 0, PATH_MAX + 1);
1727                 memset(frag_rank, 0,
1728                         sizeof(struct frag_statistic_ino) * SHOW_FRAG_FILES);
1729
1730                 if ((mode_flag & STATISTIC) && i > optind)
1731                         printf("\n");
1732
1733 #if BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN
1734                 PRINT_ERR_MSG("Endian's type is not big/little endian");
1735                 PRINT_FILE_NAME(argv[i]);
1736                 continue;
1737 #endif
1738
1739                 if (lstat64(argv[i], &buf) < 0) {
1740                         perror(NGMSG_FILE_INFO);
1741                         PRINT_FILE_NAME(argv[i]);
1742                         continue;
1743                 }
1744
1745                 /* Handle i.e. lvm device symlinks */
1746                 if (S_ISLNK(buf.st_mode)) {
1747                         struct stat64   buf2;
1748
1749                         if (stat64(argv[i], &buf2) == 0 &&
1750                             S_ISBLK(buf2.st_mode))
1751                                 buf = buf2;
1752                 }
1753
1754                 if (S_ISBLK(buf.st_mode)) {
1755                         /* Block device */
1756                         strncpy(dev_name, argv[i], strnlen(argv[i], PATH_MAX));
1757                         if (get_mount_point(argv[i], dir_name, PATH_MAX) < 0)
1758                                 continue;
1759                         if (lstat64(dir_name, &buf) < 0) {
1760                                 perror(NGMSG_FILE_INFO);
1761                                 PRINT_FILE_NAME(argv[i]);
1762                                 continue;
1763                         }
1764                         arg_type = DEVNAME;
1765                         if (!(mode_flag & STATISTIC))
1766                                 printf("ext4 defragmentation for device(%s)\n",
1767                                         argv[i]);
1768                 } else if (S_ISDIR(buf.st_mode)) {
1769                         /* Directory */
1770                         if (access(argv[i], R_OK) < 0) {
1771                                 perror(argv[i]);
1772                                 continue;
1773                         }
1774                         arg_type = DIRNAME;
1775                         strncpy(dir_name, argv[i], strnlen(argv[i], PATH_MAX));
1776                 } else if (S_ISREG(buf.st_mode)) {
1777                         /* Regular file */
1778                         arg_type = FILENAME;
1779                 } else {
1780                         /* Irregular file */
1781                         PRINT_ERR_MSG(NGMSG_FILE_UNREG);
1782                         PRINT_FILE_NAME(argv[i]);
1783                         continue;
1784                 }
1785
1786                 /* Set blocksize */
1787                 block_size = buf.st_blksize;
1788
1789                 /* For device case,
1790                  * filesystem type checked in get_mount_point()
1791                  */
1792                 if (arg_type == FILENAME || arg_type == DIRNAME) {
1793                         if (is_ext4(argv[i], dev_name) < 0)
1794                                 continue;
1795                         if (realpath(argv[i], dir_name) == NULL) {
1796                                 perror("Couldn't get full path");
1797                                 PRINT_FILE_NAME(argv[i]);
1798                                 continue;
1799                         }
1800                 }
1801
1802                 if (current_uid == ROOT_UID) {
1803                         /* Get super block info */
1804                         ret = ext2fs_open(dev_name, EXT2_FLAG_64BITS, 0,
1805                                           block_size, unix_io_manager, &fs);
1806                         if (ret) {
1807                                 if (mode_flag & DETAIL)
1808                                         com_err(argv[1], ret,
1809                                                 "while trying to open file system: %s",
1810                                                 dev_name);
1811                                 continue;
1812                         }
1813
1814                         blocks_per_group = fs->super->s_blocks_per_group;
1815                         feature_incompat = fs->super->s_feature_incompat;
1816                         log_groups_per_flex = fs->super->s_log_groups_per_flex;
1817
1818                         ext2fs_close_free(&fs);
1819                 }
1820
1821                 switch (arg_type) {
1822
1823                 case DIRNAME:
1824                         if (!(mode_flag & STATISTIC))
1825                                 printf("ext4 defragmentation "
1826                                         "for directory(%s)\n", argv[i]);
1827
1828                         mount_dir_len = strnlen(lost_found_dir, PATH_MAX);
1829
1830                         strncat(lost_found_dir, "/lost+found",
1831                                 PATH_MAX - strnlen(lost_found_dir, PATH_MAX));
1832
1833                         /* Not the case("e4defrag  mount_point_dir") */
1834                         if (dir_name[mount_dir_len] != '\0') {
1835                                 /*
1836                                  * "e4defrag mount_point_dir/lost+found"
1837                                  * or "e4defrag mount_point_dir/lost+found/"
1838                                  */
1839                                 if (strncmp(lost_found_dir, dir_name,
1840                                             strnlen(lost_found_dir,
1841                                                     PATH_MAX)) == 0 &&
1842                                     (dir_name[strnlen(lost_found_dir,
1843                                                       PATH_MAX)] == '\0' ||
1844                                      dir_name[strnlen(lost_found_dir,
1845                                                       PATH_MAX)] == '/')) {
1846                                         PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1847                                         PRINT_FILE_NAME(argv[i]);
1848                                         continue;
1849                                 }
1850
1851                                 /* "e4defrag mount_point_dir/else_dir" */
1852                                 memset(lost_found_dir, 0, PATH_MAX + 1);
1853                         }
1854                         /* fall through */
1855                 case DEVNAME:
1856                         if (arg_type == DEVNAME) {
1857                                 strncpy(lost_found_dir, dir_name,
1858                                         strnlen(dir_name, PATH_MAX));
1859                                 strncat(lost_found_dir, "/lost+found/",
1860                                         PATH_MAX - strnlen(lost_found_dir,
1861                                                            PATH_MAX));
1862                         }
1863
1864                         nftw64(dir_name, calc_entry_counts, FTW_OPEN_FD, flags);
1865
1866                         if (mode_flag & STATISTIC) {
1867                                 if (mode_flag & DETAIL)
1868                                         printf("%-40s%10s/%-10s%9s\n",
1869                                         "<File>", "now", "best", "size/ext");
1870
1871                                 if (!(mode_flag & DETAIL) &&
1872                                                 current_uid != ROOT_UID) {
1873                                         printf(" Done.\n");
1874                                         success_flag = 1;
1875                                         continue;
1876                                 }
1877
1878                                 nftw64(dir_name, file_statistic,
1879                                                         FTW_OPEN_FD, flags);
1880
1881                                 if (succeed_cnt != 0 &&
1882                                         current_uid == ROOT_UID) {
1883                                         if (mode_flag & DETAIL)
1884                                                 printf("\n");
1885                                         printf("%-40s%10s/%-10s%9s\n",
1886                                                 "<Fragmented files>", "now",
1887                                                 "best", "size/ext");
1888                                         for (j = 0; j < SHOW_FRAG_FILES; j++) {
1889                                                 if (strlen(frag_rank[j].
1890                                                         msg_buffer) > 37) {
1891                                                         printf("%d. %s\n%50d/"
1892                                                         "%-10d%6llu KB\n",
1893                                                         j + 1,
1894                                                         frag_rank[j].msg_buffer,
1895                                                         frag_rank[j].now_count,
1896                                                         frag_rank[j].best_count,
1897                                                         frag_rank[j].
1898                                                                 size_per_ext);
1899                                                 } else if (strlen(frag_rank[j].
1900                                                         msg_buffer) > 0) {
1901                                                         printf("%d. %-37s%10d/"
1902                                                         "%-10d%6llu KB\n",
1903                                                         j + 1,
1904                                                         frag_rank[j].msg_buffer,
1905                                                         frag_rank[j].now_count,
1906                                                         frag_rank[j].best_count,
1907                                                         frag_rank[j].
1908                                                                 size_per_ext);
1909                                                 } else
1910                                                         break;
1911                                         }
1912                                 }
1913                                 break;
1914                         }
1915                         /* File tree walk */
1916                         nftw64(dir_name, file_defrag, FTW_OPEN_FD, flags);
1917                         printf("\n\tSuccess:\t\t\t[ %u/%u ]\n", succeed_cnt,
1918                                 total_count);
1919                         printf("\tFailure:\t\t\t[ %u/%u ]\n",
1920                                 total_count - succeed_cnt, total_count);
1921                         if (mode_flag & DETAIL) {
1922                                 printf("\tTotal extents:\t\t\t%4d->%d\n",
1923                                         extents_before_defrag,
1924                                         extents_after_defrag);
1925                                 printf("\tFragmented percentage:\t\t"
1926                                         "%3llu%%->%llu%%\n",
1927                                         !regular_count ? 0 :
1928                                         ((unsigned long long)
1929                                         frag_files_before_defrag * 100) /
1930                                         regular_count,
1931                                         !regular_count ? 0 :
1932                                         ((unsigned long long)
1933                                         frag_files_after_defrag * 100) /
1934                                         regular_count);
1935                         }
1936                         break;
1937                 case FILENAME:
1938                         total_count = 1;
1939                         regular_count = 1;
1940                         strncat(lost_found_dir, "/lost+found/",
1941                                 PATH_MAX - strnlen(lost_found_dir,
1942                                                    PATH_MAX));
1943                         if (strncmp(lost_found_dir, dir_name,
1944                                     strnlen(lost_found_dir,
1945                                             PATH_MAX)) == 0) {
1946                                 PRINT_ERR_MSG(NGMSG_LOST_FOUND);
1947                                 PRINT_FILE_NAME(argv[i]);
1948                                 continue;
1949                         }
1950
1951                         if (mode_flag & STATISTIC) {
1952                                 file_statistic(argv[i], &buf, FTW_F, NULL);
1953                                 break;
1954                         } else
1955                                 printf("ext4 defragmentation for %s\n",
1956                                                                  argv[i]);
1957                         /* Defrag single file process */
1958                         file_defrag(argv[i], &buf, FTW_F, NULL);
1959                         if (succeed_cnt != 0)
1960                                 printf(" Success:\t\t\t[1/1]\n");
1961                         else
1962                                 printf(" Success:\t\t\t[0/1]\n");
1963
1964                         break;
1965                 }
1966
1967                 if (succeed_cnt != 0)
1968                         success_flag = 1;
1969                 if (mode_flag & STATISTIC) {
1970                         if (current_uid != ROOT_UID) {
1971                                 printf(" Done.\n");
1972                                 continue;
1973                         }
1974
1975                         if (!succeed_cnt) {
1976                                 if (mode_flag & DETAIL)
1977                                         printf("\n");
1978
1979                                 if (arg_type == DEVNAME)
1980                                         printf(" In this device(%s), "
1981                                         "none can be defragmented.\n", argv[i]);
1982                                 else if (arg_type == DIRNAME)
1983                                         printf(" In this directory(%s), "
1984                                         "none can be defragmented.\n", argv[i]);
1985                                 else
1986                                         printf(" This file(%s) "
1987                                         "can't be defragmented.\n", argv[i]);
1988                         } else {
1989                                 float files_ratio = 0.0;
1990                                 float score = 0.0;
1991                                 __u64 size_per_ext = files_block_count *
1992                                                 (buf.st_blksize / 1024) /
1993                                                 extents_before_defrag;
1994                                 files_ratio = (float)(extents_before_defrag -
1995                                                 extents_after_defrag) *
1996                                                 100 / files_block_count;
1997                                 score = CALC_SCORE(files_ratio);
1998                                 printf("\n Total/best extents\t\t\t\t%d/%d\n"
1999                                         " Average size per extent"
2000                                         "\t\t\t%llu KB\n"
2001                                         " Fragmentation score\t\t\t\t%.0f\n",
2002                                                 extents_before_defrag,
2003                                                 extents_after_defrag,
2004                                                 size_per_ext, score);
2005                                 printf(" [0-30 no problem:"
2006                                         " 31-55 a little bit fragmented:"
2007                                         " 56- needs defrag]\n");
2008
2009                                 if (arg_type == DEVNAME)
2010                                         printf(" This device (%s) ", argv[i]);
2011                                 else if (arg_type == DIRNAME)
2012                                         printf(" This directory (%s) ",
2013                                                                 argv[i]);
2014                                 else
2015                                         printf(" This file (%s) ", argv[i]);
2016
2017                                 if (score > BOUND_SCORE)
2018                                         printf("needs defragmentation.\n");
2019                                 else
2020                                         printf("does not need "
2021                                                         "defragmentation.\n");
2022                         }
2023                         printf(" Done.\n");
2024                 }
2025
2026         }
2027
2028         if (success_flag)
2029                 return 0;
2030
2031         exit(1);
2032
2033 out:
2034         printf(MSG_USAGE);
2035         exit(1);
2036 }
2037