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 < conf.loglevel_arg)
  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  * We use a hash table of size s=2^uid_hash_bits to map the uids into the
 304  * interval [0..s]. Hash collisions are treated by open addressing, i.e.
 305  * unused slots in the table are used to store different uids that hash to the
 306  * same slot.
 307  *
 308  * If a hash collision occurs, different slots are successively probed in order
 309  * to find an unused slot for the new uid. Probing is implemented via a second
 310  * hash function that maps the uid to h=(uid * PRIME2) | 1, which is always an
 311  * odd number.
 312  *
 313  * An odd number is sufficient to make sure each entry of the hash table gets
 314  * probed for probe_num between 0 and s-1 because s is a power of two, hence
 315  * the second hash value never hash a common divisor with the hash table size.
 316  * IOW: h is invertible in the ring [0..s].
 317  */
 318 static uint32_t double_hash(uint32_t uid, uint32_t probe_num)
 319 {
 320         return (uid * PRIME1 + ((uid * PRIME2) | 1) * probe_num)
 321                 % uid_hash_table_size;
 322 }
 323
 324 #define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
 325                 + uid_hash_table_size; ui++)
 326
 327 enum search_uid_flags {
 328         OPEN_USER_TABLE = 1,
 329         CREATE_USER_TABLE = 2,
 330 };
 331
 332 static int search_uid(uint32_t uid, enum search_uid_flags flags,
 333                 struct user_info **ui_ptr)
 334 {
 335         uint32_t p;
 336
 337         for (p = 0; p < uid_hash_table_size; p++) {
 338                 struct user_info *ui = uid_hash_table + double_hash(uid, p);
 339
 340                 if (!ui->table) {
 341                         int ret;
 342
 343                         if (!flags)
 344                                 return -E_BAD_UID;
 345                         ui->uid = uid;
 346                         ret = open_user_table(ui, flags & CREATE_USER_TABLE);
 347                         if (ret < 0)
 348                                 return ret;
 349                         if (ui_ptr)
 350                                 *ui_ptr = ui;
 351                         return 1;
 352                 }
 353                 if (ui->uid != uid)
 354                         continue;
 355                 if (ui_ptr)
 356                         *ui_ptr = ui;
 357                 return 0;
 358         }
 359         return flags? -E_HASH_TABLE_OVERFLOW : -E_BAD_UID;
 360 }
 361
 362 static int update_user_row(struct osl_table *t, uint64_t dir_num,
 363                 uint64_t *add)
 364 {
 365         struct osl_row *row;
 366         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
 367
 368         int ret = osl_get_row(t, UT_DIR_NUM, &obj, &row);
 369
 370         if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND)
 371                 return ret;
 372         if (ret < 0) { /* this is the first file we add */
 373                 struct osl_object objects[NUM_UT_COLUMNS];
 374                 uint64_t num_files = 1;
 375
 376                 objects[UT_DIR_NUM].data = &dir_num;
 377                 objects[UT_DIR_NUM].size = sizeof(dir_num);
 378                 objects[UT_BYTES].data = add;
 379                 objects[UT_BYTES].size = sizeof(*add);
 380                 objects[UT_FILES].data = &num_files;
 381                 objects[UT_FILES].size = sizeof(num_files);
 382                 INFO_LOG("######################### ret: %d\n", ret);
 383                 ret = osl_add_row(t, objects);
 384                 INFO_LOG("######################### ret: %d\n", ret);
 385                 return ret;
 386         } else { /* add size and increment file count */
 387                 uint64_t num;
 388                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
 389
 390                 ret = osl_get_object(t, row, UT_BYTES, &obj1);
 391                 if (ret < 0)
 392                         return ret;
 393                 num = *(uint64_t *)obj1.data + *add;
 394                 ret = osl_update_object(t, row, UT_BYTES, &obj2);
 395                 if (ret < 0)
 396                         return ret;
 397                 ret = osl_get_object(t, row, UT_FILES, &obj1);
 398                 if (ret < 0)
 399                         return ret;
 400                 num = *(uint64_t *)obj1.data + 1;
 401                 return osl_update_object(t, row, UT_FILES, &obj2);
 402         }
 403 }
 404
 405 static uint64_t num_dirs;
 406 static uint64_t num_files;
 407 static uint64_t num_bytes;
 408
 409 int scan_dir(char *dirname)
 410 {
 411         DIR *dir;
 412         struct dirent *entry;
 413         int ret, cwd_fd, ret2;
 414         uint64_t dir_size = 0, dir_files = 0;
 415         uint64_t this_dir_num = num_dirs++;
 416
 417         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)num_dirs, dirname);
 418         ret = para_opendir(dirname, &dir, &cwd_fd);
 419         if (ret < 0) {
 420                 if (ret != -ERRNO_TO_ERROR(EACCES))
 421                         return ret;
 422                 WARNING_LOG("permission denied for %s\n", dirname);
 423                 return 1;
 424         }
 425         while ((entry = readdir(dir))) {
 426                 mode_t m;
 427                 char *tmp;
 428                 struct stat s;
 429                 uint32_t uid;
 430                 uint64_t size;
 431                 struct user_info *ui;
 432
 433                 if (!strcmp(entry->d_name, "."))
 434                         continue;
 435                 if (!strcmp(entry->d_name, ".."))
 436                         continue;
 437                 if (lstat(entry->d_name, &s) == -1) {
 438                         WARNING_LOG("lstat error for %s/%s\n", dirname,
 439                                 entry->d_name);
 440                         continue;
 441                 }
 442                 m = s.st_mode;
 443                 if (!S_ISREG(m) && !S_ISDIR(m))
 444                         continue;
 445                 if (S_ISDIR(m)) {
 446                         tmp = make_message("%s/%s", dirname, entry->d_name);
 447                         ret = scan_dir(tmp);
 448                         free(tmp);
 449                         if (ret < 0)
 450                                 goto out;
 451                         continue;
 452                 }
 453                 /* regular file */
 454                 size = s.st_size;
 455                 dir_size += size;
 456                 num_bytes += size;
 457                 dir_files++;
 458                 num_files++;
 459                 uid = s.st_uid;
 460                 ret = search_uid(uid, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 461                 if (ret < 0)
 462                         goto out;
 463                 ui->bytes += size;
 464                 ui->files++;
 465                 ret = update_user_row(ui->table, this_dir_num, &size);
 466                 if (ret < 0)
 467                         goto out;
 468         }
 469         ret = add_directory(dirname, this_dir_num, &dir_size, &dir_files);
 470 out:
 471         closedir(dir);
 472         ret2 = para_fchdir(cwd_fd);
 473         if (ret2 < 0 && ret >= 0)
 474                 ret = ret2;
 475         close(cwd_fd);
 476         return ret;
 477 }
 478
 479 static int get_dir_name(struct osl_row *row, char **name)
 480 {
 481         struct osl_object obj;
 482         int ret = osl_get_object(dir_table, row, DT_NAME, &obj);
 483
 484         if (ret < 0)
 485                 return ret;
 486         *name = obj.data;
 487         return 1;
 488 }
 489
 490 enum global_stats_flags {
 491         GSF_PRINT_DIRNAME = 1,
 492         GSF_PRINT_BYTES = 2,
 493         GSF_PRINT_FILES = 4,
 494         GSF_COMPUTE_SUMMARY = 8,
 495 };
 496
 497 struct global_stats_info {
 498         uint32_t count;
 499         enum global_stats_flags flags;
 500 };
 501
 502 static int global_stats_loop_function(struct osl_row *row, void *data)
 503 {
 504         struct global_stats_info *gsi = data;
 505         struct osl_object obj;
 506         char *dirname;
 507         int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
 508
 509         if (!gsi->count && !summary)
 510                 return -E_LOOP_COMPLETE;
 511         if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
 512                 ret = get_dir_name(row, &dirname);
 513                 if (ret < 0)
 514                         return ret;
 515                 printf("%s%s", dirname,
 516                         (gsi->flags & (GSF_PRINT_FILES | GSF_PRINT_BYTES))?
 517                                 "\t" : "\n"
 518                 );
 519         }
 520         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
 521                 uint64_t files;
 522                 ret = osl_get_object(dir_table, row, DT_FILES, &obj);
 523                 if (ret < 0)
 524                         return ret;
 525                 files = *(uint64_t *)obj.data;
 526                 if (gsi->count && (gsi->flags & GSF_PRINT_FILES))
 527                         printf("%llu%s", (long long unsigned)files,
 528                                 (gsi->flags & GSF_PRINT_BYTES)? "\t" : "\n");
 529                 if (summary)
 530                         num_files += files;
 531         }
 532         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
 533                 uint64_t bytes;
 534                 ret = osl_get_object(dir_table, row, DT_BYTES, &obj);
 535                 if (ret < 0)
 536                         return ret;
 537                 bytes = *(uint64_t *)obj.data;
 538                 if (gsi->count && (gsi->flags & GSF_PRINT_BYTES))
 539                         printf("%llu\n", (long long unsigned)bytes);
 540                 if (summary) {
 541                         num_bytes += bytes;
 542                         num_dirs++;
 543                 }
 544         }
 545         if (gsi->count)
 546                 gsi->count--;
 547         return 1;
 548 }
 549
 550 static void print_id_stats(void)
 551 {
 552         struct user_info *ui;
 553
 554         printf("--------------------- user summary (uid/dirs/files/bytes):\n");
 555         FOR_EACH_USER(ui) {
 556                 if (!ui->table)
 557                         continue;
 558                 printf("%u\t%llu\t%llu\t%llu\n", (unsigned)ui->uid,
 559                         (long long unsigned)ui->dirs,
 560                         (long long unsigned)ui->files,
 561                         (long long unsigned)ui->bytes);
 562         }
 563 }
 564
 565 enum user_stats_flags {
 566         USF_PRINT_DIRNAME = 1,
 567         USF_PRINT_BYTES = 2,
 568         USF_PRINT_FILES = 4,
 569         USF_COMPUTE_SUMMARY = 8,
 570 };
 571
 572 struct user_stats_info {
 573         uint32_t count;
 574         enum user_stats_flags flags;
 575         struct user_info *ui;
 576 };
 577
 578 static int user_stats_loop_function(struct osl_row *row, void *data)
 579 {
 580         struct user_stats_info *usi = data;
 581         struct osl_row *dir_row;
 582         struct osl_object obj;
 583         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 584
 585         if (!usi->count && !summary)
 586                 return -E_LOOP_COMPLETE;
 587         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 588                 char *dirname;
 589                 ret = osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj);
 590                 if (ret < 0)
 591                         return ret;
 592                 ret = osl_get_row(dir_table, DT_NUM, &obj, &dir_row);
 593                 if (ret < 0)
 594                         return ret;
 595                 ret = osl_get_object(dir_table, dir_row, DT_NAME, &obj);
 596                 if (ret < 0)
 597                         return ret;
 598                 dirname = obj.data;
 599                 printf("%s%s",
 600                         dirname,
 601                         (usi->flags & (USF_PRINT_FILES | USF_PRINT_BYTES))?
 602                                 "\t" : "\n"
 603                 );
 604         }
 605         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 606                 uint64_t files;
 607                 ret = osl_get_object(usi->ui->table, row, UT_FILES, &obj);
 608                 if (ret < 0)
 609                         return ret;
 610                 files = *(uint64_t *)obj.data;
 611                 if (usi->count && (usi->flags & USF_PRINT_FILES))
 612                         printf("%llu%s",
 613                                 (long long unsigned)files,
 614                                 (usi->flags & USF_PRINT_BYTES)? "\t" : "\n"
 615                         );
 616                 if (summary)
 617                         usi->ui->files += files;
 618         }
 619         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 620                 uint64_t bytes;
 621                 ret = osl_get_object(usi->ui->table, row, UT_BYTES, &obj);
 622                 if (ret < 0)
 623                         return ret;
 624                 bytes = *(uint64_t *)obj.data;
 625                 if (usi->count && (usi->flags & USF_PRINT_BYTES))
 626                         printf("%llu\n", (long long unsigned)bytes);
 627                 if (summary) {
 628                         usi->ui->bytes += bytes;
 629                         usi->ui->dirs++;
 630                 }
 631
 632         }
 633         if (usi->count)
 634                 usi->count--;
 635         return 1;
 636 }
 637
 638 static void print_user_stats(void)
 639 {
 640         struct user_info *ui;
 641
 642         FOR_EACH_USER(ui) {
 643                 struct user_stats_info usi = {
 644                         .count = 10,
 645                         .ui = ui
 646                 };
 647                 if (!ui->table)
 648                         continue;
 649                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 650                 printf("************************************************ uid %u\n",
 651                         (unsigned) ui->uid);
 652                 if (!ui->table)
 653                         continue;
 654                 printf("----------------- Largest dirs -------------------\n");
 655                 osl_rbtree_loop_reverse(ui->table, UT_BYTES, &usi,
 656                         user_stats_loop_function);
 657                 printf("---------- dirs containing most files ------------\n");
 658                 usi.count = 10;
 659                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 660                 osl_rbtree_loop_reverse(ui->table, UT_FILES, &usi,
 661                         user_stats_loop_function);
 662         }
 663 }
 664
 665 static int print_statistics(void)
 666 {
 667         int ret;
 668         struct global_stats_info gsi = {
 669                 .count = 10,
 670                 .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
 671         };
 672
 673         printf("----------------- Largest dirs -------------------\n");
 674         ret = osl_rbtree_loop_reverse(dir_table, DT_BYTES, &gsi,
 675                 global_stats_loop_function);
 676         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 677                 return ret;
 678         gsi.count = 10;
 679
 680         gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 681         printf("---------- dirs containing most files ------------\n");
 682         ret = osl_rbtree_loop_reverse(dir_table, DT_FILES, &gsi,
 683                 global_stats_loop_function);
 684         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 685                 return ret;
 686
 687         printf("------------------ Global summary (dirs/files/bytes)\n"
 688                 "%llu\t%llu\t%llu\n",
 689                 (long long unsigned)num_dirs, (long long unsigned)num_files,
 690                 (long long unsigned)num_bytes);
 691         print_user_stats();
 692         print_id_stats();
 693         return 1;
 694 }
 695
 696 static int write_uid_list(void)
 697 {
 698         char *buf;
 699         uint32_t count = 0;
 700         struct user_info *ui;
 701         size_t size = num_uids * sizeof(uint32_t);
 702         int ret;
 703
 704         if (!num_uids)
 705                 return 0;
 706         buf = para_malloc(size);
 707         FOR_EACH_USER(ui) {
 708                 if (!ui->table)
 709                         continue;
 710                 write_u32(buf + count++ * sizeof(uint32_t), ui->uid);
 711         }
 712         ret = para_write_file(UID_LIST, buf, size);
 713         free(buf);
 714         return ret;
 715 }
 716
 717 static int open_dir_table(void)
 718 {
 719         return osl_open_table(&dir_table_desc, &dir_table);
 720 }
 721
 722 static void close_dir_table(void)
 723 {
 724         int ret;
 725
 726         if (!dir_table)
 727                 return;
 728         ret = osl_close_table(dir_table, OSL_MARK_CLEAN);
 729         if (ret < 0)
 730                 ERROR_LOG("failed to close dir table: %s\n", error_txt(-ret));
 731         dir_table = NULL;
 732 }
 733
 734 static void close_user_table(struct user_info *ui)
 735 {
 736         int ret;
 737
 738         if (!ui || !ui->table)
 739                 return;
 740         ret = osl_close_table(ui->table, OSL_MARK_CLEAN);
 741         if (ret < 0)
 742                 ERROR_LOG("failed to close user table %u: %s\n",
 743                         (unsigned) ui->uid, error_txt(-ret));
 744         free((char *)ui->desc->name);
 745         ui->desc->name = NULL;
 746         free((char *)ui->desc->dir);
 747         ui->desc->dir = NULL;
 748         free(ui->desc);
 749         ui->desc = NULL;
 750         ui->table = NULL;
 751 }
 752
 753 static void close_user_tables(void)
 754 {
 755         struct user_info *ui;
 756
 757         FOR_EACH_USER(ui)
 758                 close_user_table(ui);
 759 }
 760
 761 static void close_all_tables(void)
 762 {
 763         close_dir_table();
 764         close_user_tables();
 765         free_hash_table();
 766 }
 767
 768 static int com_create()
 769 {
 770         int ret = create_tables();
 771         if (ret < 0)
 772                 return ret;
 773         ret = open_dir_table();
 774         if (ret < 0)
 775                 return ret;
 776         ret = scan_dir(conf.base_dir_arg);
 777         if (ret < 0)
 778                 goto out;
 779         ret = write_uid_list();
 780 out:
 781         close_all_tables();
 782         return ret;
 783 }
 784
 785 static int read_uid_file(void)
 786 {
 787         char *map;
 788         size_t size;
 789         int ret = mmap_full_file(UID_LIST, O_RDONLY, (void **)&map, &size, NULL);
 790         uint32_t n;
 791
 792         if (ret < 0)
 793                 return ret;
 794         num_uids = size / 4;
 795         /* hash table size should be a power of two and larger than the number of uids */
 796         uid_hash_table_size = 4;
 797         while (uid_hash_table_size < num_uids)
 798                 uid_hash_table_size *= 2;
 799         create_hash_table();
 800         for (n = 0; n < num_uids; n++) {
 801                 uint32_t uid = read_u32(map + n * sizeof(uid));
 802                 ret = search_uid(uid, OPEN_USER_TABLE, NULL);
 803                 if (ret < 0)
 804                         goto out;
 805         }
 806 out:
 807         para_munmap(map, size);
 808         return ret;
 809 }
 810
 811 static int com_select(void)
 812 {
 813         int ret;
 814
 815         ret = open_dir_table();
 816         if (ret < 0)
 817                 return ret;
 818         ret = read_uid_file();
 819         if (ret < 0)
 820                 return ret;
 821         print_statistics();
 822         close_all_tables();
 823         return 1;
 824 }
 825
 826 int main(int argc, char **argv)
 827 {
 828         int ret;
 829         struct cmdline_parser_params params = {
 830                 .override = 0,
 831                 .initialize = 1,
 832                 .check_required = 0,
 833                 .check_ambiguity = 0,
 834                 .print_errors = 1
 835         };
 836
 837         cmdline_parser_ext(argc, argv, &conf, &params); /* aborts on errors */
 838         ret = -E_SYNTAX;
 839         if (conf.select_given)
 840                 ret = com_select();
 841         else
 842                 ret = com_create();
 843         if (ret < 0)
 844                 goto out;
 845 out:
 846         if (ret < 0) {
 847                 ERROR_LOG("%s\n", error_txt(-ret));
 848                 return -EXIT_FAILURE;
 849         }
 850         return EXIT_SUCCESS;
 851 }