adu.c

   1 #include "adu.h"
   2 #include <dirent.h> /* readdir() */
   3
   4 #include "gcc-compat.h"
   5 #include "cmdline.h"
   6 #include "fd.h"
   7 #include "string.h"
   8 #include "error.h"
   9 #include "portable_io.h"
  10
  11 DEFINE_ERRLIST;
  12
  13 #define DATABASE_DIR "/tmp/adu"
  14 #define UID_LIST DATABASE_DIR "/" "uid_list"
  15
  16 /** Command line and config file options. */
  17 static struct gengetopt_args_info conf;
  18
  19 struct user_info {
  20         uint32_t uid;
  21         struct osl_table *table;
  22         uint64_t files;
  23         uint64_t bytes;
  24         uint64_t dirs;
  25         struct osl_table_description *desc;
  26 };
  27
  28 static struct user_info *uid_hash_table;
  29
  30 /** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
  31 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
  32
  33
  34 /**
  35  * The log function.
  36  *
  37  * \param ll Loglevel.
  38  * \param fml Usual format string.
  39  *
  40  * All XXX_LOG() macros use this function.
  41  */
  42 __printf_2_3 void __log(int ll, const char* fmt,...)
  43 {
  44         va_list argp;
  45         FILE *outfd;
  46         struct tm *tm;
  47         time_t t1;
  48         char str[255] = "";
  49
  50         if (ll < conf.loglevel_arg)
  51                 return;
  52         outfd = stderr;
  53         time(&t1);
  54         tm = localtime(&t1);
  55         strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
  56         fprintf(outfd, "%s ", str);
  57         va_start(argp, fmt);
  58         vfprintf(outfd, fmt, argp);
  59         va_end(argp);
  60 }
  61
  62 /**
  63  * Compare the size of two directories
  64  *
  65  * \param obj1 Pointer to the first object.
  66  * \param obj2 Pointer to the second object.
  67  *
  68  * This function first compares the size values as usual integers. If they compare as
  69  * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
  70  * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
  71  */
  72 static int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
  73 {
  74         uint64_t d1 = *(uint64_t *)obj1->data;
  75         uint64_t d2 = *(uint64_t *)obj2->data;
  76         int ret = NUM_COMPARE(d2, d1);
  77
  78         if (ret)
  79                 return ret;
  80         //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
  81         return NUM_COMPARE(obj2->data, obj1->data);
  82 }
  83
  84 /**
  85  * Compare two osl objects of string type.
  86  *
  87  * \param obj1 Pointer to the first object.
  88  * \param obj2 Pointer to the second object.
  89  *
  90  * In any case, only \p MIN(obj1->size, obj2->size) characters of each string
  91  * are taken into account.
  92  *
  93  * \return It returns an integer less than, equal to, or greater than zero if
  94  * \a obj1 is found, respectively, to be less than, to match, or be greater
  95  * than obj2.
  96  *
  97  * \sa strcmp(3), strncmp(3), osl_compare_func.
  98  */
  99 static int string_compare(const struct osl_object *obj1,
 100                 const struct osl_object *obj2)
 101 {
 102         const char *str1 = (const char *)obj1->data;
 103         const char *str2 = (const char *)obj2->data;
 104         return strncmp(str1, str2, MIN(obj1->size, obj2->size));
 105 }
 106
 107 /**
 108  * Compare two osl objects pointing to unsigned integers of 64 bit size.
 109  *
 110  * \param obj1 Pointer to the first integer.
 111  * \param obj2 Pointer to the second integer.
 112  *
 113  * \return The values required for an osl compare function.
 114  *
 115  * \sa osl_compare_func, osl_hash_compare().
 116  */
 117 static int uint64_compare(const struct osl_object *obj1,
 118                 const struct osl_object *obj2)
 119 {
 120         uint64_t d1 = read_u64((const char *)obj1->data);
 121         uint64_t d2 = read_u64((const char *)obj2->data);
 122
 123         if (d1 < d2)
 124                 return 1;
 125         if (d1 > d2)
 126                 return -1;
 127         return 0;
 128 }
 129
 130 /** The columns of the directory table. */
 131 enum dir_table_columns {
 132         /** The name of the directory. */
 133         DT_NAME,
 134         /** The dir count number. */
 135         DT_NUM,
 136         /** The number of bytes of all regular files. */
 137         DT_BYTES,
 138         /** The number of all regular files. */
 139         DT_FILES,
 140         /** Number of columns in this table. */
 141         NUM_DT_COLUMNS
 142 };
 143
 144 static struct osl_column_description dir_table_cols[] = {
 145         [DT_NAME] = {
 146                 .storage_type = OSL_MAPPED_STORAGE,
 147                 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
 148                 .name = "dir",
 149                 .compare_function = string_compare,
 150         },
 151         [DT_NUM] = {
 152                 .storage_type = OSL_MAPPED_STORAGE,
 153                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 154                 .name = "num",
 155                 .compare_function = uint64_compare,
 156                 .data_size = sizeof(uint64_t)
 157         },
 158         [DT_BYTES] = {
 159                 .storage_type = OSL_MAPPED_STORAGE,
 160                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 161                 .compare_function = size_compare,
 162                 .name = "num_bytes",
 163                 .data_size = sizeof(uint64_t)
 164         },
 165         [DT_FILES] = {
 166                 .storage_type = OSL_MAPPED_STORAGE,
 167                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 168                 .compare_function = size_compare,
 169                 .name = "num_files",
 170                 .data_size = sizeof(uint64_t)
 171         }
 172 };
 173
 174 static struct osl_table_description dir_table_desc = {
 175         .name = "dir_table",
 176         .num_columns = NUM_DT_COLUMNS,
 177         .flags = 0,
 178         .column_descriptions = dir_table_cols,
 179         .dir = DATABASE_DIR
 180 };
 181
 182 /** The columns of the id table. */
 183 enum user_table_columns {
 184         /** The numer of the directory. */
 185         UT_DIR_NUM,
 186         /** The number of bytes of all regular files in this dir owned by this id. */
 187         UT_BYTES,
 188         /** The number of files in this dir owned by this id. */
 189         UT_FILES,
 190         /** Number of columns in this table. */
 191         NUM_UT_COLUMNS
 192 };
 193
 194 static struct osl_column_description user_table_cols[] = {
 195         [UT_DIR_NUM] = {
 196                 .storage_type = OSL_MAPPED_STORAGE,
 197                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 198                 .name = "dir_num",
 199                 .compare_function = uint64_compare,
 200                 .data_size = sizeof(uint64_t)
 201         },
 202         [UT_BYTES] = {
 203                 .storage_type = OSL_MAPPED_STORAGE,
 204                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 205                 .compare_function = size_compare,
 206                 .name = "num_bytes",
 207                 .data_size = sizeof(uint64_t)
 208         },
 209         [UT_FILES] = {
 210                 .storage_type = OSL_MAPPED_STORAGE,
 211                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 212                 .compare_function = size_compare,
 213                 .name = "num_files",
 214                 .data_size = sizeof(uint64_t)
 215         },
 216 };
 217
 218 static struct osl_table *dir_table;
 219
 220 static int add_directory(char *dirname, uint64_t dir_num, uint64_t *dir_size,
 221                 uint64_t *dir_files)
 222 {
 223         struct osl_object dir_objects[NUM_DT_COLUMNS];
 224
 225         INFO_LOG("adding #%llu: %s\n", (long long unsigned)dir_num, dirname);
 226         dir_objects[DT_NAME].data = dirname;
 227         dir_objects[DT_NAME].size = strlen(dirname) + 1;
 228         dir_objects[DT_NUM].data = &dir_num;
 229         dir_objects[DT_NUM].size = sizeof(dir_num);
 230         dir_objects[DT_BYTES].data = dir_size;
 231         dir_objects[DT_BYTES].size = sizeof(*dir_size);
 232         dir_objects[DT_FILES].data = dir_files;
 233         dir_objects[DT_FILES].size = sizeof(*dir_files);
 234
 235         return osl_add_row(dir_table, dir_objects);
 236 }
 237
 238 static uint32_t num_uids;
 239
 240 static int open_user_table(struct user_info *ui, int create)
 241 {
 242         int ret;
 243
 244         ui->desc = para_malloc(sizeof(*ui->desc));
 245         ui->desc->num_columns = NUM_UT_COLUMNS;
 246         ui->desc->flags = 0;
 247         ui->desc->column_descriptions = user_table_cols;
 248         ui->desc->dir = para_strdup(DATABASE_DIR);
 249         ui->desc->name = make_message("%u", (unsigned)ui->uid);
 250         num_uids++;
 251         INFO_LOG(".............................uid #%u: %u\n",
 252                 (unsigned)num_uids, (unsigned)ui->uid);
 253         if (create) {
 254                 ret = osl_create_table(ui->desc);
 255                 if (ret < 0)
 256                         goto err;
 257         }
 258         ret = osl_open_table(ui->desc, &ui->table);
 259         if (ret < 0)
 260                 goto err;
 261         return 1;
 262 err:
 263         free((char *)ui->desc->name);
 264         free((char *)ui->desc->dir);
 265         free(ui->desc);
 266         ui->desc->name = NULL;
 267         ui->desc->dir = NULL;
 268         ui->desc = NULL;
 269         ui->table = NULL;
 270         return ret;
 271 }
 272
 273 #define uid_hash_bits 8
 274 static uint32_t uid_hash_table_size = 1 << uid_hash_bits;
 275 #define PRIME1 0x811c9dc5
 276 #define PRIME2 0x01000193
 277
 278 static void create_hash_table(void)
 279 {
 280         uid_hash_table = para_calloc(uid_hash_table_size
 281                 * sizeof(struct user_info));
 282 }
 283
 284 static void free_hash_table(void)
 285 {
 286         free(uid_hash_table);
 287         uid_hash_table = NULL;
 288 }
 289
 290 static int create_tables(void)
 291 {
 292         int ret;
 293
 294         ret = osl_create_table(&dir_table_desc);
 295         if (ret < 0)
 296                 return ret;
 297         create_hash_table();
 298         return 1;
 299 }
 300
 301 /*
 302  * We use a hash table of size s=2^uid_hash_bits to map the uids into the
 303  * interval [0..s]. Hash collisions are treated by open addressing, i.e.
 304  * unused slots in the table are used to store different uids that hash to the
 305  * same slot.
 306  *
 307  * If a hash collision occurs, different slots are successively probed in order
 308  * to find an unused slot for the new uid. Probing is implemented via a second
 309  * hash function that maps the uid to h=(uid * PRIME2) | 1, which is always an
 310  * odd number.
 311  *
 312  * An odd number is sufficient to make sure each entry of the hash table gets
 313  * probed for probe_num between 0 and s-1 because s is a power of two, hence
 314  * the second hash value never hash a common divisor with the hash table size.
 315  * IOW: h is invertible in the ring [0..s].
 316  */
 317 static uint32_t double_hash(uint32_t uid, uint32_t probe_num)
 318 {
 319         return (uid * PRIME1 + ((uid * PRIME2) | 1) * probe_num)
 320                 % uid_hash_table_size;
 321 }
 322
 323 #define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
 324                 + uid_hash_table_size; ui++)
 325
 326 enum search_uid_flags {
 327         OPEN_USER_TABLE = 1,
 328         CREATE_USER_TABLE = 2,
 329 };
 330
 331 static int search_uid(uint32_t uid, enum search_uid_flags flags,
 332                 struct user_info **ui_ptr)
 333 {
 334         uint32_t p;
 335
 336         for (p = 0; p < uid_hash_table_size; p++) {
 337                 struct user_info *ui = uid_hash_table + double_hash(uid, p);
 338
 339                 if (!ui->table) {
 340                         int ret;
 341
 342                         if (!flags)
 343                                 return -E_BAD_UID;
 344                         ui->uid = uid;
 345                         ret = open_user_table(ui, flags & CREATE_USER_TABLE);
 346                         if (ret < 0)
 347                                 return ret;
 348                         if (ui_ptr)
 349                                 *ui_ptr = ui;
 350                         return 1;
 351                 }
 352                 if (ui->uid != uid)
 353                         continue;
 354                 if (ui_ptr)
 355                         *ui_ptr = ui;
 356                 return 0;
 357         }
 358         return flags? -E_HASH_TABLE_OVERFLOW : -E_BAD_UID;
 359 }
 360
 361 static int update_user_row(struct osl_table *t, uint64_t dir_num,
 362                 uint64_t *add)
 363 {
 364         struct osl_row *row;
 365         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
 366
 367         int ret = osl_get_row(t, UT_DIR_NUM, &obj, &row);
 368
 369         if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
 370                 return ret;
 371         if (ret < 0) { /* this is the first file we add */
 372                 struct osl_object objects[NUM_UT_COLUMNS];
 373                 uint64_t num_files = 1;
 374
 375                 objects[UT_DIR_NUM].data = &dir_num;
 376                 objects[UT_DIR_NUM].size = sizeof(dir_num);
 377                 objects[UT_BYTES].data = add;
 378                 objects[UT_BYTES].size = sizeof(*add);
 379                 objects[UT_FILES].data = &num_files;
 380                 objects[UT_FILES].size = sizeof(num_files);
 381                 INFO_LOG("######################### ret: %d\n", ret);
 382                 ret = osl_add_row(t, objects);
 383                 INFO_LOG("######################### ret: %d\n", ret);
 384                 return ret;
 385         } else { /* add size and increment file count */
 386                 uint64_t num;
 387                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
 388
 389                 ret = osl_get_object(t, row, UT_BYTES, &obj1);
 390                 if (ret < 0)
 391                         return ret;
 392                 num = *(uint64_t *)obj1.data + *add;
 393                 ret = osl_update_object(t, row, UT_BYTES, &obj2);
 394                 if (ret < 0)
 395                         return ret;
 396                 ret = osl_get_object(t, row, UT_FILES, &obj1);
 397                 if (ret < 0)
 398                         return ret;
 399                 num = *(uint64_t *)obj1.data + 1;
 400                 return osl_update_object(t, row, UT_FILES, &obj2);
 401         }
 402 }
 403
 404 static uint64_t num_dirs;
 405 static uint64_t num_files;
 406 static uint64_t num_bytes;
 407
 408 int scan_dir(char *dirname)
 409 {
 410         DIR *dir;
 411         struct dirent *entry;
 412         int ret, cwd_fd, ret2;
 413         uint64_t dir_size = 0, dir_files = 0;
 414         uint64_t this_dir_num = num_dirs++;
 415
 416         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)num_dirs, dirname);
 417         ret = para_opendir(dirname, &dir, &cwd_fd);
 418         if (ret < 0) {
 419                 if (ret != -ERRNO_TO_ERROR(EACCES))
 420                         return ret;
 421                 WARNING_LOG("permission denied for %s\n", dirname);
 422                 return 1;
 423         }
 424         while ((entry = readdir(dir))) {
 425                 mode_t m;
 426                 char *tmp;
 427                 struct stat s;
 428                 uint32_t uid;
 429                 uint64_t size;
 430                 struct user_info *ui;
 431
 432                 if (!strcmp(entry->d_name, "."))
 433                         continue;
 434                 if (!strcmp(entry->d_name, ".."))
 435                         continue;
 436                 if (lstat(entry->d_name, &s) == -1) {
 437                         WARNING_LOG("lstat error for %s/%s\n", dirname,
 438                                 entry->d_name);
 439                         continue;
 440                 }
 441                 m = s.st_mode;
 442                 if (!S_ISREG(m) && !S_ISDIR(m))
 443                         continue;
 444                 if (S_ISDIR(m)) {
 445                         tmp = make_message("%s/%s", dirname, entry->d_name);
 446                         ret = scan_dir(tmp);
 447                         free(tmp);
 448                         if (ret < 0)
 449                                 goto out;
 450                         continue;
 451                 }
 452                 /* regular file */
 453                 size = s.st_size;
 454                 dir_size += size;
 455                 num_bytes += size;
 456                 dir_files++;
 457                 num_files++;
 458                 uid = s.st_uid;
 459                 ret = search_uid(uid, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 460                 if (ret < 0)
 461                         goto out;
 462                 ui->bytes += size;
 463                 ui->files++;
 464                 ret = update_user_row(ui->table, this_dir_num, &size);
 465                 if (ret < 0)
 466                         goto out;
 467         }
 468         ret = add_directory(dirname, this_dir_num, &dir_size, &dir_files);
 469 out:
 470         closedir(dir);
 471         ret2 = para_fchdir(cwd_fd);
 472         if (ret2 < 0 && ret >= 0)
 473                 ret = ret2;
 474         close(cwd_fd);
 475         return ret;
 476 }
 477
 478 static int get_dir_name(struct osl_row *row, char **name)
 479 {
 480         struct osl_object obj;
 481         int ret = osl_get_object(dir_table, row, DT_NAME, &obj);
 482
 483         if (ret < 0)
 484                 return ret;
 485         *name = obj.data;
 486         return 1;
 487 }
 488
 489 enum global_stats_flags {
 490         GSF_PRINT_DIRNAME = 1,
 491         GSF_PRINT_BYTES = 2,
 492         GSF_PRINT_FILES = 4,
 493         GSF_COMPUTE_SUMMARY = 8,
 494 };
 495
 496 struct global_stats_info {
 497         uint32_t count;
 498         enum global_stats_flags flags;
 499 };
 500
 501 static int global_stats_loop_function(struct osl_row *row, void *data)
 502 {
 503         struct global_stats_info *gsi = data;
 504         struct osl_object obj;
 505         char *dirname;
 506         int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
 507
 508         if (!gsi->count && !summary)
 509                 return -E_LOOP_COMPLETE;
 510         if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
 511                 ret = get_dir_name(row, &dirname);
 512                 if (ret < 0)
 513                         return ret;
 514                 printf("%s%s", dirname,
 515                         (gsi->flags & (GSF_PRINT_FILES | GSF_PRINT_BYTES))?
 516                                 "\t" : "\n"
 517                 );
 518         }
 519         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
 520                 uint64_t files;
 521                 ret = osl_get_object(dir_table, row, DT_FILES, &obj);
 522                 if (ret < 0)
 523                         return ret;
 524                 files = *(uint64_t *)obj.data;
 525                 if (gsi->count && (gsi->flags & GSF_PRINT_FILES))
 526                         printf("%llu%s", (long long unsigned)files,
 527                                 (gsi->flags & GSF_PRINT_BYTES)? "\t" : "\n");
 528                 if (summary)
 529                         num_files += files;
 530         }
 531         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
 532                 uint64_t bytes;
 533                 ret = osl_get_object(dir_table, row, DT_BYTES, &obj);
 534                 if (ret < 0)
 535                         return ret;
 536                 bytes = *(uint64_t *)obj.data;
 537                 if (gsi->count && (gsi->flags & GSF_PRINT_BYTES))
 538                         printf("%llu\n", (long long unsigned)bytes);
 539                 if (summary) {
 540                         num_bytes += bytes;
 541                         num_dirs++;
 542                 }
 543         }
 544         if (gsi->count)
 545                 gsi->count--;
 546         return 1;
 547 }
 548
 549 static void print_id_stats(void)
 550 {
 551         struct user_info *ui;
 552
 553         printf("--------------------- user summary (uid/dirs/files/bytes):\n");
 554         FOR_EACH_USER(ui) {
 555                 if (!ui->table)
 556                         continue;
 557                 printf("%u\t%llu\t%llu\t%llu\n", (unsigned)ui->uid,
 558                         (long long unsigned)ui->dirs,
 559                         (long long unsigned)ui->files,
 560                         (long long unsigned)ui->bytes);
 561         }
 562 }
 563
 564 enum user_stats_flags {
 565         USF_PRINT_DIRNAME = 1,
 566         USF_PRINT_BYTES = 2,
 567         USF_PRINT_FILES = 4,
 568         USF_COMPUTE_SUMMARY = 8,
 569 };
 570
 571 struct user_stats_info {
 572         uint32_t count;
 573         enum user_stats_flags flags;
 574         struct user_info *ui;
 575 };
 576
 577 static int user_stats_loop_function(struct osl_row *row, void *data)
 578 {
 579         struct user_stats_info *usi = data;
 580         struct osl_row *dir_row;
 581         struct osl_object obj;
 582         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 583
 584         if (!usi->count && !summary)
 585                 return -E_LOOP_COMPLETE;
 586         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 587                 char *dirname;
 588                 ret = osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj);
 589                 if (ret < 0)
 590                         return ret;
 591                 ret = osl_get_row(dir_table, DT_NUM, &obj, &dir_row);
 592                 if (ret < 0)
 593                         return ret;
 594                 ret = osl_get_object(dir_table, dir_row, DT_NAME, &obj);
 595                 if (ret < 0)
 596                         return ret;
 597                 dirname = obj.data;
 598                 printf("%s%s",
 599                         dirname,
 600                         (usi->flags & (USF_PRINT_FILES | USF_PRINT_BYTES))?
 601                                 "\t" : "\n"
 602                 );
 603         }
 604         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 605                 uint64_t files;
 606                 ret = osl_get_object(usi->ui->table, row, UT_FILES, &obj);
 607                 if (ret < 0)
 608                         return ret;
 609                 files = *(uint64_t *)obj.data;
 610                 if (usi->count && (usi->flags & USF_PRINT_FILES))
 611                         printf("%llu%s",
 612                                 (long long unsigned)files,
 613                                 (usi->flags & USF_PRINT_BYTES)? "\t" : "\n"
 614                         );
 615                 if (summary)
 616                         usi->ui->files += files;
 617         }
 618         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 619                 uint64_t bytes;
 620                 ret = osl_get_object(usi->ui->table, row, UT_BYTES, &obj);
 621                 if (ret < 0)
 622                         return ret;
 623                 bytes = *(uint64_t *)obj.data;
 624                 if (usi->count && (usi->flags & USF_PRINT_BYTES))
 625                         printf("%llu\n", (long long unsigned)bytes);
 626                 if (summary) {
 627                         usi->ui->bytes += bytes;
 628                         usi->ui->dirs++;
 629                 }
 630
 631         }
 632         if (usi->count)
 633                 usi->count--;
 634         return 1;
 635 }
 636
 637 static void print_user_stats(void)
 638 {
 639         struct user_info *ui;
 640
 641         FOR_EACH_USER(ui) {
 642                 struct user_stats_info usi = {
 643                         .count = 10,
 644                         .ui = ui
 645                 };
 646                 if (!ui->table)
 647                         continue;
 648                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 649                 printf("************************************************ uid %u\n",
 650                         (unsigned) ui->uid);
 651                 if (!ui->table)
 652                         continue;
 653                 printf("----------------- Largest dirs -------------------\n");
 654                 osl_rbtree_loop_reverse(ui->table, UT_BYTES, &usi,
 655                         user_stats_loop_function);
 656                 printf("---------- dirs containing most files ------------\n");
 657                 usi.count = 10;
 658                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 659                 osl_rbtree_loop_reverse(ui->table, UT_FILES, &usi,
 660                         user_stats_loop_function);
 661         }
 662 }
 663
 664 static int print_statistics(void)
 665 {
 666         int ret;
 667         struct global_stats_info gsi = {
 668                 .count = 10,
 669                 .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
 670         };
 671
 672         printf("----------------- Largest dirs -------------------\n");
 673         ret = osl_rbtree_loop_reverse(dir_table, DT_BYTES, &gsi,
 674                 global_stats_loop_function);
 675         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 676                 return ret;
 677         gsi.count = 10;
 678
 679         gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 680         printf("---------- dirs containing most files ------------\n");
 681         ret = osl_rbtree_loop_reverse(dir_table, DT_FILES, &gsi,
 682                 global_stats_loop_function);
 683         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 684                 return ret;
 685
 686         printf("------------------ Global summary (dirs/files/bytes)\n"
 687                 "%llu\t%llu\t%llu\n",
 688                 (long long unsigned)num_dirs, (long long unsigned)num_files,
 689                 (long long unsigned)num_bytes);
 690         print_user_stats();
 691         print_id_stats();
 692         return 1;
 693 }
 694
 695 static int write_uid_list(void)
 696 {
 697         char *buf;
 698         uint32_t count = 0;
 699         struct user_info *ui;
 700         size_t size = num_uids * sizeof(uint32_t);
 701         int ret;
 702
 703         if (!num_uids)
 704                 return 0;
 705         buf = para_malloc(size);
 706         FOR_EACH_USER(ui) {
 707                 if (!ui->table)
 708                         continue;
 709                 write_u32(buf + count++ * sizeof(uint32_t), ui->uid);
 710         }
 711         ret = para_write_file(UID_LIST, buf, size);
 712         free(buf);
 713         return ret;
 714 }
 715
 716 static int open_dir_table(void)
 717 {
 718         return osl_open_table(&dir_table_desc, &dir_table);
 719 }
 720
 721 static void close_dir_table(void)
 722 {
 723         int ret;
 724
 725         if (!dir_table)
 726                 return;
 727         ret = osl_close_table(dir_table, OSL_MARK_CLEAN);
 728         if (ret < 0)
 729                 ERROR_LOG("failed to close dir table: %s\n", error_txt(-ret));
 730         dir_table = NULL;
 731 }
 732
 733 static void close_user_table(struct user_info *ui)
 734 {
 735         int ret;
 736
 737         if (!ui || !ui->table)
 738                 return;
 739         ret = osl_close_table(ui->table, OSL_MARK_CLEAN);
 740         if (ret < 0)
 741                 ERROR_LOG("failed to close user table %u: %s\n",
 742                         (unsigned) ui->uid, error_txt(-ret));
 743         free((char *)ui->desc->name);
 744         ui->desc->name = NULL;
 745         free((char *)ui->desc->dir);
 746         ui->desc->dir = NULL;
 747         free(ui->desc);
 748         ui->desc = NULL;
 749         ui->table = NULL;
 750 }
 751
 752 static void close_user_tables(void)
 753 {
 754         struct user_info *ui;
 755
 756         FOR_EACH_USER(ui)
 757                 close_user_table(ui);
 758 }
 759
 760 static void close_all_tables(void)
 761 {
 762         close_dir_table();
 763         close_user_tables();
 764         free_hash_table();
 765 }
 766
 767 static int com_create()
 768 {
 769         int ret = create_tables();
 770         if (ret < 0)
 771                 return ret;
 772         ret = open_dir_table();
 773         if (ret < 0)
 774                 return ret;
 775         ret = scan_dir(conf.base_dir_arg);
 776         if (ret < 0)
 777                 goto out;
 778         ret = write_uid_list();
 779 out:
 780         close_all_tables();
 781         return ret;
 782 }
 783
 784 static int read_uid_file(void)
 785 {
 786         char *map;
 787         size_t size;
 788         int ret = mmap_full_file(UID_LIST, O_RDONLY, (void **)&map, &size, NULL);
 789         uint32_t n;
 790
 791         if (ret < 0)
 792                 return ret;
 793         num_uids = size / 4;
 794         /* hash table size should be a power of two and larger than the number of uids */
 795         uid_hash_table_size = 4;
 796         while (uid_hash_table_size < num_uids)
 797                 uid_hash_table_size *= 2;
 798         create_hash_table();
 799         for (n = 0; n < num_uids; n++) {
 800                 uint32_t uid = read_u32(map + n * sizeof(uid));
 801                 ret = search_uid(uid, OPEN_USER_TABLE, NULL);
 802                 if (ret < 0)
 803                         goto out;
 804         }
 805 out:
 806         para_munmap(map, size);
 807         return ret;
 808 }
 809
 810 static int com_select(void)
 811 {
 812         int ret;
 813
 814         ret = open_dir_table();
 815         if (ret < 0)
 816                 return ret;
 817         ret = read_uid_file();
 818         if (ret < 0)
 819                 return ret;
 820         print_statistics();
 821         close_all_tables();
 822         return 1;
 823 }
 824
 825 int main(int argc, char **argv)
 826 {
 827         int ret;
 828         struct cmdline_parser_params params = {
 829                 .override = 0,
 830                 .initialize = 1,
 831                 .check_required = 0,
 832                 .check_ambiguity = 0,
 833                 .print_errors = 1
 834         };
 835
 836         cmdline_parser_ext(argc, argv, &conf, &params); /* aborts on errors */
 837         ret = -E_SYNTAX;
 838         if (conf.select_given)
 839                 ret = com_select();
 840         else
 841                 ret = com_create();
 842         if (ret < 0)
 843                 goto out;
 844 out:
 845         if (ret < 0) {
 846                 ERROR_LOG("%s\n", error_txt(-ret));
 847                 return -EXIT_FAILURE;
 848         }
 849         return EXIT_SUCCESS;
 850 }