adu.c

   1 #include "adu.h"
   2 #include <dirent.h> /* readdir() */
   3
   4 #include "gcc-compat.h"
   5 #include "cmdline.h"
   6 #include "osl.h"
   7 #include "fd.h"
   8 #include "hash.h"
   9 #include "string.h"
  10 #include "error.h"
  11
  12 DEFINE_ERRLIST;
  13
  14 #define DATABASE_DIR "/tmp/adu"
  15 #define UID_LIST DATABASE_DIR "/" "uid_list"
  16
  17 /** Command line and config file options. */
  18 static struct gengetopt_args_info conf;
  19
  20 struct user_info {
  21         uint32_t uid;
  22         struct osl_table *table;
  23         uint64_t files;
  24         uint64_t bytes;
  25         uint64_t dirs;
  26         struct osl_table_description *desc;
  27 };
  28
  29 static struct user_info *uid_hash_table;
  30
  31 /** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
  32 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
  33
  34
  35 /**
  36  * The log function.
  37  *
  38  * \param ll Loglevel.
  39  * \param fml Usual format string.
  40  *
  41  * All XXX_LOG() macros use this function.
  42  */
  43 __printf_2_3 void __log(int ll, const char* fmt,...)
  44 {
  45         va_list argp;
  46         FILE *outfd;
  47         struct tm *tm;
  48         time_t t1;
  49         char str[255] = "";
  50
  51         if (ll < 4)
  52                 return;
  53         outfd = stderr;
  54         time(&t1);
  55         tm = localtime(&t1);
  56         strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
  57         fprintf(outfd, "%s ", str);
  58         va_start(argp, fmt);
  59         vfprintf(outfd, fmt, argp);
  60         va_end(argp);
  61 }
  62
  63 /**
  64  * Compare the size of two directories
  65  *
  66  * \param obj1 Pointer to the first object.
  67  * \param obj2 Pointer to the second object.
  68  *
  69  * This function first compares the size values as usual integers. If they compare as
  70  * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
  71  * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
  72  */
  73 static int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
  74 {
  75         uint64_t d1 = *(uint64_t *)obj1->data;
  76         uint64_t d2 = *(uint64_t *)obj2->data;
  77         int ret = NUM_COMPARE(d2, d1);
  78
  79         if (ret)
  80                 return ret;
  81         //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
  82         return NUM_COMPARE(obj2->data, obj1->data);
  83 }
  84
  85 /**
  86  * Compare two osl objects of string type.
  87  *
  88  * \param obj1 Pointer to the first object.
  89  * \param obj2 Pointer to the second object.
  90  *
  91  * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
  92  * are taken into account.
  93  *
  94  * \return It returns an integer less than, equal to, or greater than zero if
  95  * \a obj1 is found, respectively, to be less than, to match, or be greater
  96  * than obj2.
  97  *
  98  * \sa strcmp(3), strncmp(3), osl_compare_func.
  99  */
 100 static int string_compare(const struct osl_object *obj1,
 101                 const struct osl_object *obj2)
 102 {
 103         const char *str1 = (const char *)obj1->data;
 104         const char *str2 = (const char *)obj2->data;
 105         return strncmp(str1, str2, MIN(obj1->size, obj2->size));
 106 }
 107
 108 /**
 109  * Compare two osl objects pointing to unsigned integers of 64 bit size.
 110  *
 111  * \param obj1 Pointer to the first integer.
 112  * \param obj2 Pointer to the second integer.
 113  *
 114  * \return The values required for an osl compare function.
 115  *
 116  * \sa osl_compare_func, osl_hash_compare().
 117  */
 118 static int uint64_compare(const struct osl_object *obj1,
 119                 const struct osl_object *obj2)
 120 {
 121         uint64_t d1 = read_u64((const char *)obj1->data);
 122         uint64_t d2 = read_u64((const char *)obj2->data);
 123
 124         if (d1 < d2)
 125                 return 1;
 126         if (d1 > d2)
 127                 return -1;
 128         return 0;
 129 }
 130
 131 /** The columns of the directory table. */
 132 enum dir_table_columns {
 133         /** The name of the directory. */
 134         DT_NAME,
 135         /** The dir count number. */
 136         DT_NUM,
 137         /** The number of bytes of all regular files. */
 138         DT_BYTES,
 139         /** The number of all regular files. */
 140         DT_FILES,
 141         /** Number of columns in this table. */
 142         NUM_DT_COLUMNS
 143 };
 144
 145 static struct osl_column_description dir_table_cols[] = {
 146         [DT_NAME] = {
 147                 .storage_type = OSL_MAPPED_STORAGE,
 148                 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
 149                 .name = "dir",
 150                 .compare_function = string_compare,
 151         },
 152         [DT_NUM] = {
 153                 .storage_type = OSL_MAPPED_STORAGE,
 154                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 155                 .name = "num",
 156                 .compare_function = uint64_compare,
 157                 .data_size = sizeof(uint64_t)
 158         },
 159         [DT_BYTES] = {
 160                 .storage_type = OSL_MAPPED_STORAGE,
 161                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 162                 .compare_function = size_compare,
 163                 .name = "num_bytes",
 164                 .data_size = sizeof(uint64_t)
 165         },
 166         [DT_FILES] = {
 167                 .storage_type = OSL_MAPPED_STORAGE,
 168                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 169                 .compare_function = size_compare,
 170                 .name = "num_files",
 171                 .data_size = sizeof(uint64_t)
 172         }
 173 };
 174
 175 static struct osl_table_description dir_table_desc = {
 176         .name = "dir_table",
 177         .num_columns = NUM_DT_COLUMNS,
 178         .flags = 0,
 179         .column_descriptions = dir_table_cols,
 180         .dir = DATABASE_DIR
 181 };
 182
 183 /** The columns of the id table. */
 184 enum user_table_columns {
 185         /** The numer of the directory. */
 186         UT_DIR_NUM,
 187         /** The number of bytes of all regular files in this dir owned by this id. */
 188         UT_BYTES,
 189         /** The number of files in this dir owned by this id. */
 190         UT_FILES,
 191         /** Number of columns in this table. */
 192         NUM_UT_COLUMNS
 193 };
 194
 195 static struct osl_column_description user_table_cols[] = {
 196         [UT_DIR_NUM] = {
 197                 .storage_type = OSL_MAPPED_STORAGE,
 198                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 199                 .name = "dir_num",
 200                 .compare_function = uint64_compare,
 201                 .data_size = sizeof(uint64_t)
 202         },
 203         [UT_BYTES] = {
 204                 .storage_type = OSL_MAPPED_STORAGE,
 205                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 206                 .compare_function = size_compare,
 207                 .name = "num_bytes",
 208                 .data_size = sizeof(uint64_t)
 209         },
 210         [UT_FILES] = {
 211                 .storage_type = OSL_MAPPED_STORAGE,
 212                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 213                 .compare_function = size_compare,
 214                 .name = "num_files",
 215                 .data_size = sizeof(uint64_t)
 216         },
 217 };
 218
 219 static struct osl_table *dir_table;
 220
 221 static int add_directory(char *dirname, uint64_t dir_num, uint64_t *dir_size,
 222                 uint64_t *dir_files)
 223 {
 224         struct osl_object dir_objects[NUM_DT_COLUMNS];
 225
 226         INFO_LOG("adding #%llu: %s\n", (long long unsigned)dir_num, dirname);
 227         dir_objects[DT_NAME].data = dirname;
 228         dir_objects[DT_NAME].size = strlen(dirname) + 1;
 229         dir_objects[DT_NUM].data = &dir_num;
 230         dir_objects[DT_NUM].size = sizeof(dir_num);
 231         dir_objects[DT_BYTES].data = dir_size;
 232         dir_objects[DT_BYTES].size = sizeof(*dir_size);
 233         dir_objects[DT_FILES].data = dir_files;
 234         dir_objects[DT_FILES].size = sizeof(*dir_files);
 235
 236         return osl_add_row(dir_table, dir_objects);
 237 }
 238
 239 static uint32_t num_uids;
 240
 241 static int open_user_table(struct user_info *ui, int create)
 242 {
 243         int ret;
 244
 245         ui->desc = para_malloc(sizeof(*ui->desc));
 246         ui->desc->num_columns = NUM_UT_COLUMNS;
 247         ui->desc->flags = 0;
 248         ui->desc->column_descriptions = user_table_cols;
 249         ui->desc->dir = para_strdup(DATABASE_DIR);
 250         ui->desc->name = make_message("%u", (unsigned)ui->uid);
 251         num_uids++;
 252         INFO_LOG(".............................uid #%u: %u\n",
 253                 (unsigned)num_uids, (unsigned)ui->uid);
 254         if (create) {
 255                 ret = osl_create_table(ui->desc);
 256                 if (ret < 0)
 257                         goto err;
 258         }
 259         ret = osl_open_table(ui->desc, &ui->table);
 260         if (ret < 0)
 261                 goto err;
 262         return 1;
 263 err:
 264         free((char *)ui->desc->name);
 265         free((char *)ui->desc->dir);
 266         free(ui->desc);
 267         ui->desc->name = NULL;
 268         ui->desc->dir = NULL;
 269         ui->desc = NULL;
 270         ui->table = NULL;
 271         return ret;
 272 }
 273
 274 #define uid_hash_bits 8
 275 static uint32_t uid_hash_table_size = 1 << uid_hash_bits;
 276 #define PRIME1 0x811c9dc5
 277 #define PRIME2 0x01000193
 278
 279 static void create_hash_table(void)
 280 {
 281         uid_hash_table = para_calloc(uid_hash_table_size
 282                 * sizeof(struct user_info));
 283 }
 284
 285 static void free_hash_table(void)
 286 {
 287         free(uid_hash_table);
 288         uid_hash_table = NULL;
 289 }
 290
 291 static int create_tables(void)
 292 {
 293         int ret;
 294
 295         ret = osl_create_table(&dir_table_desc);
 296         if (ret < 0)
 297                 return ret;
 298         create_hash_table();
 299         return 1;
 300 }
 301
 302
 303 static uint32_t double_hash(uint32_t uid, uint32_t probe_num)
 304 {
 305         return (uid * PRIME1 + ((uid * PRIME2) | 1) * probe_num)
 306                 % uid_hash_table_size;
 307 }
 308
 309 #define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
 310                 + uid_hash_table_size; ui++)
 311
 312 enum search_uid_flags {
 313         OPEN_USER_TABLE = 1,
 314         CREATE_USER_TABLE = 2,
 315 };
 316
 317 static int search_uid(uint32_t uid, enum search_uid_flags flags,
 318                 struct user_info **ui_ptr)
 319 {
 320         uint32_t p;
 321
 322         for (p = 0; p < uid_hash_table_size; p++) {
 323                 struct user_info *ui = uid_hash_table + double_hash(uid, p);
 324
 325                 if (!ui->table) {
 326                         int ret;
 327
 328                         if (!flags)
 329                                 return -E_BAD_UID;
 330                         ui->uid = uid;
 331                         ret = open_user_table(ui, flags & CREATE_USER_TABLE);
 332                         if (ret < 0)
 333                                 return ret;
 334                         if (ui_ptr)
 335                                 *ui_ptr = ui;
 336                         return 1;
 337                 }
 338                 if (ui->uid != uid)
 339                         continue;
 340                 if (ui_ptr)
 341                         *ui_ptr = ui;
 342                 return 0;
 343         }
 344         return flags? -E_HASH_TABLE_OVERFLOW : -E_BAD_UID;
 345 }
 346
 347 static int update_user_row(struct osl_table *t, uint64_t dir_num,
 348                 uint64_t *add)
 349 {
 350         struct osl_row *row;
 351         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
 352
 353         int ret = osl_get_row(t, UT_DIR_NUM, &obj, &row);
 354
 355         if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
 356                 return ret;
 357         if (ret < 0) { /* this is the first file we add */
 358                 struct osl_object objects[NUM_UT_COLUMNS];
 359                 uint64_t num_files = 1;
 360
 361                 objects[UT_DIR_NUM].data = &dir_num;
 362                 objects[UT_DIR_NUM].size = sizeof(dir_num);
 363                 objects[UT_BYTES].data = add;
 364                 objects[UT_BYTES].size = sizeof(*add);
 365                 objects[UT_FILES].data = &num_files;
 366                 objects[UT_FILES].size = sizeof(num_files);
 367                 INFO_LOG("######################### ret: %d\n", ret);
 368                 ret = osl_add_row(t, objects);
 369                 INFO_LOG("######################### ret: %d\n", ret);
 370                 return ret;
 371         } else { /* add size and increment file count */
 372                 uint64_t num;
 373                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
 374
 375                 ret = osl_get_object(t, row, UT_BYTES, &obj1);
 376                 if (ret < 0)
 377                         return ret;
 378                 num = *(uint64_t *)obj1.data + *add;
 379                 ret = osl_update_object(t, row, UT_BYTES, &obj2);
 380                 if (ret < 0)
 381                         return ret;
 382                 ret = osl_get_object(t, row, UT_FILES, &obj1);
 383                 if (ret < 0)
 384                         return ret;
 385                 num = *(uint64_t *)obj1.data + 1;
 386                 return osl_update_object(t, row, UT_FILES, &obj2);
 387         }
 388 }
 389
 390 static uint64_t num_dirs;
 391 static uint64_t num_files;
 392 static uint64_t num_bytes;
 393
 394 int scan_dir(char *dirname)
 395 {
 396         DIR *dir;
 397         struct dirent *entry;
 398         int ret, cwd_fd, ret2;
 399         uint64_t dir_size = 0, dir_files = 0;
 400         uint64_t this_dir_num = num_dirs++;
 401
 402         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)num_dirs, dirname);
 403         ret = para_opendir(dirname, &dir, &cwd_fd);
 404         if (ret < 0) {
 405                 if (ret != -ERRNO_TO_ERROR(EACCES))
 406                         return ret;
 407                 WARNING_LOG("permission denied for %s\n", dirname);
 408                 return 1;
 409         }
 410         while ((entry = readdir(dir))) {
 411                 mode_t m;
 412                 char *tmp;
 413                 struct stat s;
 414                 uint32_t uid;
 415                 uint64_t size;
 416                 struct user_info *ui;
 417
 418                 if (!strcmp(entry->d_name, "."))
 419                         continue;
 420                 if (!strcmp(entry->d_name, ".."))
 421                         continue;
 422                 if (lstat(entry->d_name, &s) == -1) {
 423                         WARNING_LOG("lstat error for %s/%s\n", dirname,
 424                                 entry->d_name);
 425                         continue;
 426                 }
 427                 m = s.st_mode;
 428                 if (!S_ISREG(m) && !S_ISDIR(m))
 429                         continue;
 430                 if (S_ISDIR(m)) {
 431                         tmp = make_message("%s/%s", dirname, entry->d_name);
 432                         ret = scan_dir(tmp);
 433                         free(tmp);
 434                         if (ret < 0)
 435                                 goto out;
 436                         continue;
 437                 }
 438                 /* regular file */
 439                 size = s.st_size;
 440                 dir_size += size;
 441                 num_bytes += size;
 442                 dir_files++;
 443                 num_files++;
 444                 uid = s.st_uid;
 445                 ret = search_uid(uid, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 446                 if (ret < 0)
 447                         goto out;
 448                 ui->bytes += size;
 449                 ui->files++;
 450                 ret = update_user_row(ui->table, this_dir_num, &size);
 451                 if (ret < 0)
 452                         goto out;
 453         }
 454         ret = add_directory(dirname, this_dir_num, &dir_size, &dir_files);
 455 out:
 456         closedir(dir);
 457         ret2 = para_fchdir(cwd_fd);
 458         if (ret2 < 0 && ret >= 0)
 459                 ret = ret2;
 460         close(cwd_fd);
 461         return ret;
 462 }
 463
 464 static int get_dir_name(struct osl_row *row, char **name)
 465 {
 466         struct osl_object obj;
 467         int ret = osl_get_object(dir_table, row, DT_NAME, &obj);
 468
 469         if (ret < 0)
 470                 return ret;
 471         *name = obj.data;
 472         return 1;
 473 }
 474
 475 enum global_stats_flags {
 476         GSF_PRINT_DIRNAME = 1,
 477         GSF_PRINT_BYTES = 2,
 478         GSF_PRINT_FILES = 4,
 479         GSF_COMPUTE_SUMMARY = 8,
 480 };
 481
 482 struct global_stats_info {
 483         uint32_t count;
 484         enum global_stats_flags flags;
 485 };
 486
 487 static int global_stats_loop_function(struct osl_row *row, void *data)
 488 {
 489         struct global_stats_info *gsi = data;
 490         struct osl_object obj;
 491         char *dirname;
 492         int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
 493
 494         if (!gsi->count && !summary)
 495                 return -E_LOOP_COMPLETE;
 496         if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
 497                 ret = get_dir_name(row, &dirname);
 498                 if (ret < 0)
 499                         return ret;
 500                 printf("%s%s", dirname,
 501                         (gsi->flags & (GSF_PRINT_FILES | GSF_PRINT_BYTES))?
 502                                 "\t" : "\n"
 503                 );
 504         }
 505         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
 506                 uint64_t files;
 507                 ret = osl_get_object(dir_table, row, DT_FILES, &obj);
 508                 if (ret < 0)
 509                         return ret;
 510                 files = *(uint64_t *)obj.data;
 511                 if (gsi->count && (gsi->flags & GSF_PRINT_FILES))
 512                         printf("%llu%s", (long long unsigned)files,
 513                                 (gsi->flags & GSF_PRINT_BYTES)? "\t" : "\n");
 514                 if (summary)
 515                         num_files += files;
 516         }
 517         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
 518                 uint64_t bytes;
 519                 ret = osl_get_object(dir_table, row, DT_BYTES, &obj);
 520                 if (ret < 0)
 521                         return ret;
 522                 bytes = *(uint64_t *)obj.data;
 523                 if (gsi->count && (gsi->flags & GSF_PRINT_BYTES))
 524                         printf("%llu\n", (long long unsigned)bytes);
 525                 if (summary) {
 526                         num_bytes += bytes;
 527                         num_dirs++;
 528                 }
 529         }
 530         if (gsi->count)
 531                 gsi->count--;
 532         return 1;
 533 }
 534
 535 static void print_id_stats(void)
 536 {
 537         struct user_info *ui;
 538
 539         printf("--------------------- user summary (uid/dirs/files/bytes):\n");
 540         FOR_EACH_USER(ui) {
 541                 if (!ui->table)
 542                         continue;
 543                 printf("%u\t%llu\t%llu\t%llu\n", (unsigned)ui->uid,
 544                         (long long unsigned)ui->dirs,
 545                         (long long unsigned)ui->files,
 546                         (long long unsigned)ui->bytes);
 547         }
 548 }
 549
 550 enum user_stats_flags {
 551         USF_PRINT_DIRNAME = 1,
 552         USF_PRINT_BYTES = 2,
 553         USF_PRINT_FILES = 4,
 554         USF_COMPUTE_SUMMARY = 8,
 555 };
 556
 557 struct user_stats_info {
 558         uint32_t count;
 559         enum user_stats_flags flags;
 560         struct user_info *ui;
 561 };
 562
 563 static int user_stats_loop_function(struct osl_row *row, void *data)
 564 {
 565         struct user_stats_info *usi = data;
 566         struct osl_row *dir_row;
 567         struct osl_object obj;
 568         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 569
 570         if (!usi->count && !summary)
 571                 return -E_LOOP_COMPLETE;
 572         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 573                 char *dirname;
 574                 ret = osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj);
 575                 if (ret < 0)
 576                         return ret;
 577                 ret = osl_get_row(dir_table, DT_NUM, &obj, &dir_row);
 578                 if (ret < 0)
 579                         return ret;
 580                 ret = osl_get_object(dir_table, dir_row, DT_NAME, &obj);
 581                 if (ret < 0)
 582                         return ret;
 583                 dirname = obj.data;
 584                 printf("%s%s",
 585                         dirname,
 586                         (usi->flags & (USF_PRINT_FILES | USF_PRINT_BYTES))?
 587                                 "\t" : "\n"
 588                 );
 589         }
 590         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 591                 uint64_t files;
 592                 ret = osl_get_object(usi->ui->table, row, UT_FILES, &obj);
 593                 if (ret < 0)
 594                         return ret;
 595                 files = *(uint64_t *)obj.data;
 596                 if (usi->count && (usi->flags & USF_PRINT_FILES))
 597                         printf("%llu%s",
 598                                 (long long unsigned)files,
 599                                 (usi->flags & USF_PRINT_BYTES)? "\t" : "\n"
 600                         );
 601                 if (summary)
 602                         usi->ui->files += files;
 603         }
 604         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 605                 uint64_t bytes;
 606                 ret = osl_get_object(usi->ui->table, row, UT_BYTES, &obj);
 607                 if (ret < 0)
 608                         return ret;
 609                 bytes = *(uint64_t *)obj.data;
 610                 if (usi->count && (usi->flags & USF_PRINT_BYTES))
 611                         printf("%llu\n", (long long unsigned)bytes);
 612                 if (summary) {
 613                         usi->ui->bytes += bytes;
 614                         usi->ui->dirs++;
 615                 }
 616
 617         }
 618         if (usi->count)
 619                 usi->count--;
 620         return 1;
 621 }
 622
 623 static void print_user_stats(void)
 624 {
 625         struct user_info *ui;
 626
 627         FOR_EACH_USER(ui) {
 628                 struct user_stats_info usi = {
 629                         .count = 10,
 630                         .ui = ui
 631                 };
 632                 if (!ui->table)
 633                         continue;
 634                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 635                 printf("************************************************ uid %u\n",
 636                         (unsigned) ui->uid);
 637                 if (!ui->table)
 638                         continue;
 639                 printf("----------------- Largest dirs -------------------\n");
 640                 osl_rbtree_loop_reverse(ui->table, UT_BYTES, &usi,
 641                         user_stats_loop_function);
 642                 printf("---------- dirs containing most files ------------\n");
 643                 usi.count = 10;
 644                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 645                 osl_rbtree_loop_reverse(ui->table, UT_FILES, &usi,
 646                         user_stats_loop_function);
 647         }
 648 }
 649
 650 static int print_statistics(void)
 651 {
 652         int ret;
 653         struct global_stats_info gsi = {
 654                 .count = 10,
 655                 .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
 656         };
 657
 658         printf("----------------- Largest dirs -------------------\n");
 659         ret = osl_rbtree_loop_reverse(dir_table, DT_BYTES, &gsi,
 660                 global_stats_loop_function);
 661         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 662                 return ret;
 663         gsi.count = 10;
 664
 665         gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 666         printf("---------- dirs containing most files ------------\n");
 667         ret = osl_rbtree_loop_reverse(dir_table, DT_FILES, &gsi,
 668                 global_stats_loop_function);
 669         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 670                 return ret;
 671
 672         printf("------------------ Global summary (dirs/files/bytes)\n"
 673                 "%llu\t%llu\t%llu\n",
 674                 (long long unsigned)num_dirs, (long long unsigned)num_files,
 675                 (long long unsigned)num_bytes);
 676         print_user_stats();
 677         print_id_stats();
 678         return 1;
 679 }
 680
 681 static int write_uid_list(void)
 682 {
 683         char *buf;
 684         uint32_t count = 0;
 685         struct user_info *ui;
 686         size_t size = num_uids * sizeof(uint32_t);
 687         int ret;
 688
 689         if (!num_uids)
 690                 return 0;
 691         buf = para_malloc(size);
 692         FOR_EACH_USER(ui) {
 693                 if (!ui->table)
 694                         continue;
 695                 write_u32(buf + count++ * sizeof(uint32_t), ui->uid);
 696         }
 697         ret = para_write_file(UID_LIST, buf, size);
 698         free(buf);
 699         return ret;
 700 }
 701
 702 static int open_dir_table(void)
 703 {
 704         return osl_open_table(&dir_table_desc, &dir_table);
 705 }
 706
 707 static void close_dir_table(void)
 708 {
 709         int ret;
 710
 711         if (!dir_table)
 712                 return;
 713         ret = osl_close_table(dir_table, OSL_MARK_CLEAN);
 714         if (ret < 0)
 715                 ERROR_LOG("failed to close dir table: %s\n", error_txt(-ret));
 716         dir_table = NULL;
 717 }
 718
 719 static void close_user_table(struct user_info *ui)
 720 {
 721         int ret;
 722
 723         if (!ui || !ui->table)
 724                 return;
 725         ret = osl_close_table(ui->table, OSL_MARK_CLEAN);
 726         if (ret < 0)
 727                 ERROR_LOG("failed to close user table %u: %s\n",
 728                         (unsigned) ui->uid, error_txt(-ret));
 729         free((char *)ui->desc->name);
 730         ui->desc->name = NULL;
 731         free((char *)ui->desc->dir);
 732         ui->desc->dir = NULL;
 733         free(ui->desc);
 734         ui->desc = NULL;
 735         ui->table = NULL;
 736 }
 737
 738 static void close_user_tables(void)
 739 {
 740         struct user_info *ui;
 741
 742         FOR_EACH_USER(ui)
 743                 close_user_table(ui);
 744 }
 745
 746 static void close_all_tables(void)
 747 {
 748         close_dir_table();
 749         close_user_tables();
 750         free_hash_table();
 751 }
 752
 753 static int com_create(char *dirname)
 754 {
 755         int ret = create_tables();
 756         if (ret < 0)
 757                 return ret;
 758         ret = open_dir_table();
 759         if (ret < 0)
 760                 return ret;
 761         ret = scan_dir(dirname);
 762         if (ret < 0)
 763                 goto out;
 764         ret = write_uid_list();
 765 out:
 766         close_all_tables();
 767         return ret;
 768 }
 769
 770 static int read_uid_file(void)
 771 {
 772         char *map;
 773         size_t size;
 774         int ret = mmap_full_file(UID_LIST, O_RDONLY, (void **)&map, &size, NULL);
 775         uint32_t n;
 776
 777         if (ret < 0)
 778                 return ret;
 779         num_uids = size / 4;
 780         /* hash table size should be a power of two and larger than the number of uids */
 781         uid_hash_table_size = 4;
 782         while (uid_hash_table_size < num_uids)
 783                 uid_hash_table_size *= 2;
 784         create_hash_table();
 785         for (n = 0; n < num_uids; n++) {
 786                 uint32_t uid = read_u32(map + n * sizeof(uid));
 787                 ret = search_uid(uid, OPEN_USER_TABLE, NULL);
 788                 if (ret < 0)
 789                         goto out;
 790         }
 791 out:
 792         para_munmap(map, size);
 793         return ret;
 794 }
 795
 796 static int com_select(void)
 797 {
 798         int ret;
 799
 800         ret = open_dir_table();
 801         if (ret < 0)
 802                 return ret;
 803         ret = read_uid_file();
 804         if (ret < 0)
 805                 return ret;
 806         print_statistics();
 807         close_all_tables();
 808         return 1;
 809 }
 810
 811 int main(int argc, char **argv)
 812 {
 813         int ret = -E_SYNTAX;
 814         struct cmdline_parser_params params = {
 815                 .override = 0,
 816                 .initialize = 1,
 817                 .check_required = 0,
 818                 .check_ambiguity = 0,
 819                 .print_errors = 1
 820         };
 821
 822         cmdline_parser_ext(argc, argv, &conf, &params); /* aborts on errors */
 823         if (argc > 2)
 824                 goto out;
 825         if (argc == 1)
 826                 ret = com_select();
 827         else
 828                 ret = com_create(argv[1]);
 829         if (ret < 0)
 830                 goto out;
 831 out:
 832         if (ret < 0) {
 833                 ERROR_LOG("%s\n", error_txt(-ret));
 834                 return -EXIT_FAILURE;
 835         }
 836         return EXIT_SUCCESS;
 837 }