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 int osl_errno;
  13
  14 /** Command line and config file options. */
  15 static struct gengetopt_args_info conf;
  16
  17 enum uid_info_flags {
  18         /** whether this slot of the hash table is used. */
  19         UI_FL_SLOT_USED = 1,
  20         /** whether this uid should be taken into account. */
  21         UI_FL_ADMISSIBLE = 2,
  22 };
  23
  24 struct user_info {
  25         uint32_t uid;
  26         uint32_t flags;
  27         struct osl_table *table;
  28         uint64_t files;
  29         uint64_t bytes;
  30         uint64_t dirs;
  31         struct osl_table_description *desc;
  32 };
  33
  34 /**
  35  * Contains info for each user that owns at least one regular file.
  36  *
  37  * Even users that are not taken into account because of the --uid
  38  * option occupy a slot in this hash table. This allows to find out
  39  * quicky whether a uid is admissible. And yes, this has to be fast.
  40  */
  41 static struct user_info *uid_hash_table;
  42
  43 static inline int ui_used(struct user_info *ui)
  44 {
  45         return ui->flags & UI_FL_SLOT_USED;
  46 }
  47
  48 static inline int ui_admissible(struct user_info *ui)
  49 {
  50         return ui->flags & UI_FL_ADMISSIBLE;
  51 }
  52
  53 struct uid_range {
  54         uint32_t low;
  55         uint32_t high;
  56 };
  57
  58 static struct uid_range *admissible_uids;
  59
  60 static inline int check_uid_arg(const char *arg, uint32_t *uid)
  61 {
  62         const uint32_t max = ~0U;
  63         /*
  64          * we need an 64-bit int for string -> uid conversion because strtoll()
  65          * returns a signed value.
  66          */
  67         int64_t val;
  68         int ret = para_atoi64(arg, &val);
  69
  70         if (ret < 0)
  71                 return ret;
  72         if (val < 0 || val > max)
  73                 return -ERRNO_TO_ERROR(EINVAL);
  74         *uid = val;
  75         return 1;
  76 }
  77
  78 static int parse_uid_range(const char *orig_arg, struct uid_range *ur)
  79 {
  80         int ret;
  81         char *arg = para_strdup(orig_arg), *p = strchr(arg, '-');
  82
  83         if (!p || p == arg) {
  84                 if (p == arg) /* -42 */
  85                         p++;
  86                 ret = check_uid_arg(p, &ur->high);
  87                 if (ret < 0)
  88                         goto out;
  89                 ur->low = p? 0 : ur->high;
  90                 ret = 1;
  91                 goto out;
  92         }
  93         /* 42- or 42-4711 */
  94         *p = '\0';
  95         p++;
  96         ret = check_uid_arg(arg, &ur->low);
  97         if (ret < 0)
  98                 goto out;
  99         ur->high = ~0U;
 100         if (*p) { /* 42-4711 */
 101                 ret = check_uid_arg(p, &ur->high);
 102                 if (ret < 0)
 103                         goto out;
 104         }
 105         if (ur->low > ur->high)
 106                 ret = -ERRNO_TO_ERROR(EINVAL);
 107 out:
 108         if (ret < 0)
 109                 ERROR_LOG("bad uid option: %s\n", orig_arg);
 110         else
 111                 INFO_LOG("admissible uid range: %u - %u\n", ur->low,
 112                         ur->high);
 113         free(arg);
 114         return ret;
 115 }
 116
 117
 118 /** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
 119 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
 120
 121 /**
 122  * The log function.
 123  *
 124  * \param ll Loglevel.
 125  * \param fml Usual format string.
 126  *
 127  * All XXX_LOG() macros use this function.
 128  */
 129 __printf_2_3 void __log(int ll, const char* fmt,...)
 130 {
 131         va_list argp;
 132         FILE *outfd;
 133         struct tm *tm;
 134         time_t t1;
 135         char str[255] = "";
 136
 137         if (ll < conf.loglevel_arg)
 138                 return;
 139         outfd = stderr;
 140         time(&t1);
 141         tm = localtime(&t1);
 142         strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
 143         fprintf(outfd, "%s ", str);
 144         va_start(argp, fmt);
 145         vfprintf(outfd, fmt, argp);
 146         va_end(argp);
 147 }
 148
 149 /**
 150  * Compare the size of two directories
 151  *
 152  * \param obj1 Pointer to the first object.
 153  * \param obj2 Pointer to the second object.
 154  *
 155  * This function first compares the size values as usual integers. If they compare as
 156  * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
 157  * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
 158  */
 159 static int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
 160 {
 161         uint64_t d1 = *(uint64_t *)obj1->data;
 162         uint64_t d2 = *(uint64_t *)obj2->data;
 163         int ret = NUM_COMPARE(d2, d1);
 164
 165         if (ret)
 166                 return ret;
 167         //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
 168         return NUM_COMPARE(obj2->data, obj1->data);
 169 }
 170
 171 /**
 172  * Compare two osl objects pointing to unsigned integers of 64 bit size.
 173  *
 174  * \param obj1 Pointer to the first integer.
 175  * \param obj2 Pointer to the second integer.
 176  *
 177  * \return The values required for an osl compare function.
 178  *
 179  * \sa osl_compare_func, osl_hash_compare().
 180  */
 181 static int uint64_compare(const struct osl_object *obj1,
 182                 const struct osl_object *obj2)
 183 {
 184         uint64_t d1 = read_u64((const char *)obj1->data);
 185         uint64_t d2 = read_u64((const char *)obj2->data);
 186
 187         if (d1 < d2)
 188                 return 1;
 189         if (d1 > d2)
 190                 return -1;
 191         return 0;
 192 }
 193
 194 /** The columns of the directory table. */
 195 enum dir_table_columns {
 196         /** The name of the directory. */
 197         DT_NAME,
 198         /** The dir count number. */
 199         DT_NUM,
 200         /** The number of the parent directory. */
 201         DT_PARENT_NUM,
 202         /** The number of bytes of all regular files. */
 203         DT_BYTES,
 204         /** The number of all regular files. */
 205         DT_FILES,
 206         /** Number of columns in this table. */
 207         NUM_DT_COLUMNS
 208 };
 209
 210 static struct osl_column_description dir_table_cols[] = {
 211         [DT_NAME] = {
 212                 .storage_type = OSL_MAPPED_STORAGE,
 213                 .storage_flags = 0,
 214                 .name = "dir",
 215         },
 216         [DT_NUM] = {
 217                 .storage_type = OSL_MAPPED_STORAGE,
 218                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 219                 .name = "num",
 220                 .compare_function = uint64_compare,
 221                 .data_size = sizeof(uint64_t)
 222         },
 223         [DT_PARENT_NUM] = {
 224                 .storage_type = OSL_MAPPED_STORAGE,
 225                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 226                 .name = "parent_num",
 227                 .compare_function = size_compare,
 228                 .data_size = sizeof(uint64_t)
 229         },
 230         [DT_BYTES] = {
 231                 .storage_type = OSL_MAPPED_STORAGE,
 232                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 233                 .compare_function = size_compare,
 234                 .name = "num_bytes",
 235                 .data_size = sizeof(uint64_t)
 236         },
 237         [DT_FILES] = {
 238                 .storage_type = OSL_MAPPED_STORAGE,
 239                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 240                 .compare_function = size_compare,
 241                 .name = "num_files",
 242                 .data_size = sizeof(uint64_t)
 243         }
 244 };
 245
 246 static struct osl_table_description dir_table_desc = {
 247         .name = "dir_table",
 248         .num_columns = NUM_DT_COLUMNS,
 249         .flags = 0,
 250         .column_descriptions = dir_table_cols,
 251 };
 252
 253 /** The columns of the id table. */
 254 enum user_table_columns {
 255         /** The numer of the directory. */
 256         UT_DIR_NUM,
 257         /** The number of bytes of all regular files in this dir owned by this id. */
 258         UT_BYTES,
 259         /** The number of files in this dir owned by this id. */
 260         UT_FILES,
 261         /** Number of columns in this table. */
 262         NUM_UT_COLUMNS
 263 };
 264
 265 static struct osl_column_description user_table_cols[] = {
 266         [UT_DIR_NUM] = {
 267                 .storage_type = OSL_MAPPED_STORAGE,
 268                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 269                 .name = "dir_num",
 270                 .compare_function = uint64_compare,
 271                 .data_size = sizeof(uint64_t)
 272         },
 273         [UT_BYTES] = {
 274                 .storage_type = OSL_MAPPED_STORAGE,
 275                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 276                 .compare_function = size_compare,
 277                 .name = "num_bytes",
 278                 .data_size = sizeof(uint64_t)
 279         },
 280         [UT_FILES] = {
 281                 .storage_type = OSL_MAPPED_STORAGE,
 282                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 283                 .compare_function = size_compare,
 284                 .name = "num_files",
 285                 .data_size = sizeof(uint64_t)
 286         },
 287 };
 288
 289 static struct osl_table *dir_table;
 290
 291 static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
 292                 uint64_t *dir_size, uint64_t *dir_files)
 293 {
 294         struct osl_object dir_objects[NUM_DT_COLUMNS];
 295
 296         INFO_LOG("adding #%llu: %s\n", (long long unsigned)*dir_num, dirname);
 297         dir_objects[DT_NAME].data = dirname;
 298         dir_objects[DT_NAME].size = strlen(dirname) + 1;
 299         dir_objects[DT_NUM].data = dir_num;
 300         dir_objects[DT_NUM].size = sizeof(*dir_num);
 301         dir_objects[DT_PARENT_NUM].data = parent_dir_num;
 302         dir_objects[DT_PARENT_NUM].size = sizeof(*parent_dir_num);
 303         dir_objects[DT_BYTES].data = dir_size;
 304         dir_objects[DT_BYTES].size = sizeof(*dir_size);
 305         dir_objects[DT_FILES].data = dir_files;
 306         dir_objects[DT_FILES].size = sizeof(*dir_files);
 307         return osl(osl_add_row(dir_table, dir_objects));
 308 }
 309
 310 static uint32_t num_uids;
 311
 312 static int open_user_table(struct user_info *ui, int create)
 313 {
 314         int ret;
 315
 316         ui->desc = para_malloc(sizeof(*ui->desc));
 317         ui->desc->num_columns = NUM_UT_COLUMNS;
 318         ui->desc->flags = 0;
 319         ui->desc->column_descriptions = user_table_cols;
 320         ui->desc->dir = para_strdup(conf.database_dir_arg);
 321         ui->desc->name = make_message("%u", (unsigned)ui->uid);
 322         INFO_LOG(".............................uid #%u: %u\n",
 323                 (unsigned)num_uids, (unsigned)ui->uid);
 324         if (create) {
 325                 ret = osl(osl_create_table(ui->desc));
 326                 if (ret < 0)
 327                         goto err;
 328                 num_uids++;
 329         }
 330         ret = osl(osl_open_table(ui->desc, &ui->table));
 331         if (ret < 0)
 332                 goto err;
 333         return 1;
 334 err:
 335         free((char *)ui->desc->name);
 336         free((char *)ui->desc->dir);
 337         free(ui->desc);
 338         ui->desc->name = NULL;
 339         ui->desc->dir = NULL;
 340         ui->desc = NULL;
 341         ui->table = NULL;
 342         ui->flags = 0;
 343         return ret;
 344 }
 345
 346 #define uid_hash_bits 8
 347 static uint32_t uid_hash_table_size = 1 << uid_hash_bits;
 348 #define PRIME1 0x811c9dc5
 349 #define PRIME2 0x01000193
 350
 351 static void create_hash_table(void)
 352 {
 353         uid_hash_table = para_calloc(uid_hash_table_size
 354                 * sizeof(struct user_info));
 355 }
 356
 357 static void free_hash_table(void)
 358 {
 359         free(uid_hash_table);
 360         uid_hash_table = NULL;
 361 }
 362
 363 static int create_tables(void)
 364 {
 365         int ret;
 366
 367         dir_table_desc.dir = para_strdup(conf.database_dir_arg);
 368         ret = osl(osl_create_table(&dir_table_desc));
 369         if (ret < 0)
 370                 return ret;
 371         create_hash_table();
 372         return 1;
 373 }
 374
 375 /*
 376  * We use a hash table of size s=2^uid_hash_bits to map the uids into the
 377  * interval [0..s]. Hash collisions are treated by open addressing, i.e.
 378  * unused slots in the table are used to store different uids that hash to the
 379  * same slot.
 380  *
 381  * If a hash collision occurs, different slots are successively probed in order
 382  * to find an unused slot for the new uid. Probing is implemented via a second
 383  * hash function that maps the uid to h=(uid * PRIME2) | 1, which is always an
 384  * odd number.
 385  *
 386  * An odd number is sufficient to make sure each entry of the hash table gets
 387  * probed for probe_num between 0 and s-1 because s is a power of two, hence
 388  * the second hash value has never a common divisor with the hash table size.
 389  * IOW: h is invertible in the ring [0..s].
 390  */
 391 static uint32_t double_hash(uint32_t uid, uint32_t probe_num)
 392 {
 393         return (uid * PRIME1 + ((uid * PRIME2) | 1) * probe_num)
 394                 % uid_hash_table_size;
 395 }
 396
 397 #define FOR_EACH_USER(ui) for (ui = uid_hash_table; ui && ui < uid_hash_table \
 398                 + uid_hash_table_size; ui++)
 399
 400 enum search_uid_flags {
 401         OPEN_USER_TABLE = 1,
 402         CREATE_USER_TABLE = 2,
 403 };
 404
 405 static int uid_is_admissible(uint32_t uid)
 406 {
 407         int i;
 408
 409         for (i = 0; i < conf.uid_given; i++) {
 410                 struct uid_range *ur = admissible_uids + i;
 411
 412                 if (ur->low <= uid && ur->high >= uid)
 413                         break;
 414         }
 415         i = !conf.uid_given || i < conf.uid_given;
 416         DEBUG_LOG("uid %u is %sadmissible\n", (unsigned)uid,
 417                 i? "" : "not ");
 418         return i;
 419 }
 420
 421 static int search_uid(uint32_t uid, enum search_uid_flags flags,
 422                 struct user_info **ui_ptr)
 423 {
 424         uint32_t p;
 425
 426         for (p = 0; p < uid_hash_table_size; p++) {
 427                 struct user_info *ui = uid_hash_table + double_hash(uid, p);
 428
 429                 if (!ui_used(ui)) {
 430                         int ret;
 431                         if (!flags)
 432                                 return -E_BAD_UID;
 433                         ui->uid = uid;
 434                         ui->flags |= UI_FL_SLOT_USED;
 435                         if (!uid_is_admissible(uid))
 436                                 return 0;
 437                         ui->flags |= UI_FL_ADMISSIBLE;
 438                         ret = open_user_table(ui, flags & CREATE_USER_TABLE);
 439                         if (ret < 0)
 440                                 return ret;
 441
 442                         if (ui_ptr)
 443                                 *ui_ptr = ui;
 444                         return 1;
 445                 }
 446                 if (ui->uid != uid)
 447                         continue;
 448                 if (ui_ptr)
 449                         *ui_ptr = ui;
 450                 return 0;
 451         }
 452         return flags? -E_HASH_TABLE_OVERFLOW : -E_BAD_UID;
 453 }
 454
 455 static int update_user_row(struct osl_table *t, uint64_t dir_num,
 456                 uint64_t *add)
 457 {
 458         struct osl_row *row;
 459         struct osl_object obj = {.data = &dir_num, .size = sizeof(dir_num)};
 460
 461         int ret = osl(osl_get_row(t, UT_DIR_NUM, &obj, &row));
 462
 463         if (ret == -E_OSL && osl_errno != E_OSL_RB_KEY_NOT_FOUND)
 464                 return ret;
 465         if (ret < 0) { /* this is the first file we add */
 466                 struct osl_object objects[NUM_UT_COLUMNS];
 467                 uint64_t num_files = 1;
 468
 469                 objects[UT_DIR_NUM].data = &dir_num;
 470                 objects[UT_DIR_NUM].size = sizeof(dir_num);
 471                 objects[UT_BYTES].data = add;
 472                 objects[UT_BYTES].size = sizeof(*add);
 473                 objects[UT_FILES].data = &num_files;
 474                 objects[UT_FILES].size = sizeof(num_files);
 475                 INFO_LOG("######################### ret: %d\n", ret);
 476                 ret = osl(osl_add_row(t, objects));
 477                 INFO_LOG("######################### ret: %d\n", ret);
 478                 return ret;
 479         } else { /* add size and increment file count */
 480                 uint64_t num;
 481                 struct osl_object obj1, obj2 = {.data = &num, .size = sizeof(num)};
 482
 483                 ret = osl(osl_get_object(t, row, UT_BYTES, &obj1));
 484                 if (ret < 0)
 485                         return ret;
 486                 num = *(uint64_t *)obj1.data + *add;
 487                 ret = osl(osl_update_object(t, row, UT_BYTES, &obj2));
 488                 if (ret < 0)
 489                         return ret;
 490                 ret = osl(osl_get_object(t, row, UT_FILES, &obj1));
 491                 if (ret < 0)
 492                         return ret;
 493                 num = *(uint64_t *)obj1.data + 1;
 494                 return osl(osl_update_object(t, row, UT_FILES, &obj2));
 495         }
 496 }
 497
 498 static uint64_t num_dirs;
 499 static uint64_t num_files;
 500 static uint64_t num_bytes;
 501
 502 int scan_dir(char *dirname, uint64_t *parent_dir_num)
 503 {
 504         DIR *dir;
 505         struct dirent *entry;
 506         int ret, cwd_fd, ret2;
 507         uint64_t dir_size = 0, dir_files = 0;
 508         uint64_t this_dir_num = ++num_dirs;
 509
 510         DEBUG_LOG("----------------- %llu: %s\n", (long long unsigned)num_dirs, dirname);
 511         ret = para_opendir(dirname, &dir, &cwd_fd);
 512         if (ret < 0) {
 513                 if (ret != -ERRNO_TO_ERROR(EACCES))
 514                         return ret;
 515                 WARNING_LOG("permission denied for %s\n", dirname);
 516                 return 1;
 517         }
 518         while ((entry = readdir(dir))) {
 519                 mode_t m;
 520                 struct stat s;
 521                 uint32_t uid;
 522                 uint64_t size;
 523                 struct user_info *ui;
 524
 525                 if (!strcmp(entry->d_name, "."))
 526                         continue;
 527                 if (!strcmp(entry->d_name, ".."))
 528                         continue;
 529                 if (lstat(entry->d_name, &s) == -1) {
 530                         WARNING_LOG("lstat error for %s/%s\n", dirname,
 531                                 entry->d_name);
 532                         continue;
 533                 }
 534                 m = s.st_mode;
 535                 if (!S_ISREG(m) && !S_ISDIR(m))
 536                         continue;
 537                 if (S_ISDIR(m)) {
 538                         ret = scan_dir(entry->d_name, &this_dir_num);
 539                         if (ret < 0)
 540                                 goto out;
 541                         continue;
 542                 }
 543                 /* regular file */
 544                 size = s.st_size;
 545                 dir_size += size;
 546                 num_bytes += size;
 547                 dir_files++;
 548                 num_files++;
 549                 uid = s.st_uid;
 550                 ret = search_uid(uid, CREATE_USER_TABLE | OPEN_USER_TABLE, &ui);
 551                 if (ret < 0)
 552                         goto out;
 553                 ui->bytes += size;
 554                 ui->files++;
 555                 ret = update_user_row(ui->table, this_dir_num, &size);
 556                 if (ret < 0)
 557                         goto out;
 558         }
 559         ret = add_directory(dirname, &this_dir_num, parent_dir_num,
 560                         &dir_size, &dir_files);
 561 out:
 562         closedir(dir);
 563         ret2 = para_fchdir(cwd_fd);
 564         if (ret2 < 0 && ret >= 0)
 565                 ret = ret2;
 566         close(cwd_fd);
 567         return ret;
 568 }
 569
 570 static int get_dir_name_by_number(uint64_t *dirnum, char **name)
 571 {
 572         char *result = NULL, *tmp;
 573         struct osl_row *row;
 574         uint64_t val = *dirnum;
 575         struct osl_object obj = {.data = &val, .size = sizeof(val)};
 576         int ret;
 577
 578 again:
 579         ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
 580         if (ret < 0)
 581                 goto out;
 582         ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
 583         if (ret < 0)
 584                 goto out;
 585         if (result) {
 586                 tmp = make_message("%s/%s", (char *)obj.data, result);
 587                 free(result);
 588                 result = tmp;
 589         } else
 590                 result = para_strdup((char *)obj.data);
 591         ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
 592         if (ret < 0)
 593                 goto out;
 594         val = *(uint64_t *)obj.data;
 595         if (val)
 596                 goto again;
 597 out:
 598         if (ret < 0) {
 599                 free(result);
 600                 *name = NULL;
 601         } else
 602                 *name = result;
 603         return ret;
 604 }
 605
 606 static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
 607 {
 608         struct osl_object obj;
 609         int ret;
 610         char *this_dir, *prefix = NULL;
 611
 612         *name = NULL;
 613         ret = osl(osl_get_object(dir_table, dir_table_row, DT_NAME, &obj));
 614         if (ret < 0)
 615                 return ret;
 616         this_dir = para_strdup((char *)obj.data);
 617         ret = osl(osl_get_object(dir_table, dir_table_row, DT_PARENT_NUM, &obj));
 618         if (ret < 0)
 619                 goto out;
 620         if (!*(uint64_t *)obj.data) {
 621                 *name = this_dir;
 622                 return 1;
 623         }
 624         ret = get_dir_name_by_number((uint64_t *)obj.data, &prefix);
 625         if (ret < 0)
 626                 goto out;
 627         *name = make_message("%s/%s", prefix, this_dir);
 628         free(prefix);
 629         ret = 1;
 630 out:
 631         free(this_dir);
 632         return ret;
 633 }
 634
 635 const uint64_t size_unit_divisors[] = {
 636         [size_unit_arg_b] = 1ULL,
 637         [size_unit_arg_k] = 1024ULL,
 638         [size_unit_arg_m] = 1024ULL * 1024ULL,
 639         [size_unit_arg_g] = 1024ULL * 1024ULL * 1024ULL,
 640         [size_unit_arg_t] = 1024ULL * 1024ULL * 1024ULL * 1024ULL,
 641 };
 642
 643 const uint64_t count_unit_divisors[] = {
 644
 645         [count_unit_arg_n] = 1ULL,
 646         [count_unit_arg_k] = 1000ULL,
 647         [count_unit_arg_m] = 1000ULL * 1000ULL,
 648         [count_unit_arg_g] = 1000ULL * 1000ULL * 1000ULL,
 649         [count_unit_arg_t] = 1000ULL * 1000ULL * 1000ULL * 1000ULL,
 650 };
 651
 652 const char size_unit_abbrevs[] = " BKMGT";
 653 const char count_unit_abbrevs[] = "  KMGT";
 654
 655 static void format_size_value(enum enum_size_unit unit, uint64_t value, char *result)
 656 {
 657         if (unit == size_unit_arg_h) /* human readable */
 658                 for (unit = size_unit_arg_b; unit < size_unit_arg_t && value > size_unit_divisors[unit + 1]; unit++)
 659                                 ; /* nothing */
 660         sprintf(result, "%llu%c", (long long unsigned)value / size_unit_divisors[unit], size_unit_abbrevs[unit]);
 661 }
 662
 663 static void format_count_value(enum enum_count_unit unit, uint64_t value, char *result)
 664 {
 665         if (unit == count_unit_arg_h) /* human readable */
 666                 for (unit = count_unit_arg_n; unit < count_unit_arg_t && value > count_unit_divisors[unit + 1]; unit++)
 667                                 ; /* nothing */
 668         sprintf(result, "%llu%c", (long long unsigned)value / count_unit_divisors[unit], count_unit_abbrevs[unit]);
 669 }
 670
 671 enum global_stats_flags {
 672         GSF_PRINT_DIRNAME = 1,
 673         GSF_PRINT_BYTES = 2,
 674         GSF_PRINT_FILES = 4,
 675         GSF_COMPUTE_SUMMARY = 8,
 676 };
 677
 678 struct global_stats_info {
 679         uint32_t count;
 680         enum global_stats_flags flags;
 681 };
 682
 683 static int global_stats_loop_function(struct osl_row *row, void *data)
 684 {
 685         struct global_stats_info *gsi = data;
 686         struct osl_object obj;
 687         char *dirname, formated_value[25];
 688         int ret, summary = gsi->flags & GSF_COMPUTE_SUMMARY;
 689
 690         if (!gsi->count && !summary)
 691                 return -E_LOOP_COMPLETE;
 692         if (gsi->count && (gsi->flags & GSF_PRINT_DIRNAME)) {
 693                 ret = get_dir_name_of_row(row, &dirname);
 694                 if (ret < 0)
 695                         return ret;
 696                 printf("%s%s", dirname,
 697                         (gsi->flags & (GSF_PRINT_FILES | GSF_PRINT_BYTES))?
 698                                 "\t" : "\n"
 699                 );
 700         }
 701         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_FILES))) {
 702                 uint64_t files;
 703                 ret = osl(osl_get_object(dir_table, row, DT_FILES, &obj));
 704                 if (ret < 0)
 705                         return ret;
 706                 files = *(uint64_t *)obj.data;
 707                 if (gsi->count && (gsi->flags & GSF_PRINT_FILES)) {
 708                         format_size_value(conf.size_unit_arg, files,
 709                                 formated_value);
 710                         printf("%s%s", formated_value,
 711                                 (gsi->flags & GSF_PRINT_BYTES)? "\t" : "\n");
 712                 }
 713                 if (summary)
 714                         num_files += files;
 715         }
 716         if (summary || (gsi->count && (gsi->flags & GSF_PRINT_BYTES))) {
 717                 uint64_t bytes;
 718                 ret = osl(osl_get_object(dir_table, row, DT_BYTES, &obj));
 719                 if (ret < 0)
 720                         return ret;
 721                 bytes = *(uint64_t *)obj.data;
 722                 if (gsi->count && (gsi->flags & GSF_PRINT_BYTES)) {
 723                         format_size_value(conf.size_unit_arg, bytes,
 724                                 formated_value);
 725                         printf("%s\n", formated_value);
 726                 }
 727                 if (summary) {
 728                         num_bytes += bytes;
 729                         num_dirs++;
 730                 }
 731         }
 732         if (gsi->count > 0)
 733                 gsi->count--;
 734         return 1;
 735 }
 736
 737 static void print_id_stats(void)
 738 {
 739         struct user_info *ui;
 740
 741         printf("--------------------- user summary (uid/dirs/files/bytes):\n");
 742         FOR_EACH_USER(ui) {
 743                 char formated_dir_count[25], formated_file_count[25],
 744                         formated_bytes[25];
 745                 if (!ui_used(ui))
 746                         continue;
 747                 format_count_value(conf.count_unit_arg, ui->dirs,
 748                         formated_dir_count);
 749                 format_count_value(conf.count_unit_arg, ui->files,
 750                         formated_file_count);
 751                 format_size_value(conf.size_unit_arg, ui->bytes,
 752                         formated_bytes);
 753                 printf("%u\t%s\t%s\t%s\n", (unsigned)ui->uid,
 754                         formated_dir_count,
 755                         formated_file_count,
 756                         formated_bytes
 757                 );
 758         }
 759 }
 760
 761 enum user_stats_flags {
 762         USF_PRINT_DIRNAME = 1,
 763         USF_PRINT_BYTES = 2,
 764         USF_PRINT_FILES = 4,
 765         USF_COMPUTE_SUMMARY = 8,
 766 };
 767
 768 struct user_stats_info {
 769         uint32_t count;
 770         enum user_stats_flags flags;
 771         struct user_info *ui;
 772 };
 773
 774 static int user_stats_loop_function(struct osl_row *row, void *data)
 775 {
 776         struct user_stats_info *usi = data;
 777         struct osl_object obj;
 778         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 779         char formated_value[25];
 780
 781         if (!usi->count && !summary)
 782                 return -E_LOOP_COMPLETE;
 783         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 784                 char *dirname;
 785                 ret = osl(osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj));
 786                 if (ret < 0)
 787                         return ret;
 788                 ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
 789                 if (ret < 0)
 790                         return ret;
 791                 printf("%s%s",
 792                         dirname,
 793                         (usi->flags & (USF_PRINT_FILES | USF_PRINT_BYTES))?
 794                                 "\t" : "\n"
 795                 );
 796         }
 797         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 798                 uint64_t files;
 799                 ret = osl(osl_get_object(usi->ui->table, row, UT_FILES, &obj));
 800                 if (ret < 0)
 801                         return ret;
 802                 files = *(uint64_t *)obj.data;
 803                 if (usi->count && (usi->flags & USF_PRINT_FILES)) {
 804                         format_size_value(conf.size_unit_arg, files,
 805                                 formated_value);
 806                         printf("%s%s", formated_value,
 807                                 (usi->flags & USF_PRINT_BYTES)? "\t" : "\n"
 808                         );
 809                 }
 810                 if (summary)
 811                         usi->ui->files += files;
 812         }
 813         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 814                 uint64_t bytes;
 815                 ret = osl(osl_get_object(usi->ui->table, row, UT_BYTES, &obj));
 816                 if (ret < 0)
 817                         return ret;
 818                 bytes = *(uint64_t *)obj.data;
 819                 if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
 820                         format_size_value(conf.size_unit_arg, bytes,
 821                                 formated_value);
 822                         printf("%s\n", formated_value);
 823                 }
 824                 if (summary) {
 825                         usi->ui->bytes += bytes;
 826                         usi->ui->dirs++;
 827                 }
 828
 829         }
 830         if (usi->count > 0)
 831                 usi->count--;
 832         return 1;
 833 }
 834
 835 static void print_user_stats(void)
 836 {
 837         struct user_info *ui;
 838
 839         FOR_EACH_USER(ui) {
 840                 struct user_stats_info usi = {
 841                         .count = conf.limit_arg,
 842                         .ui = ui
 843                 };
 844                 if (!ui_used(ui) || !ui_admissible(ui))
 845                         continue;
 846                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 847                 printf("************************************************ uid %u\n",
 848                         (unsigned) ui->uid);
 849                 printf("----------------- Largest dirs -------------------\n");
 850                 osl(osl_rbtree_loop_reverse(ui->table, UT_BYTES, &usi,
 851                         user_stats_loop_function));
 852                 printf("---------- dirs containing most files ------------\n");
 853                 usi.count = conf.limit_arg,
 854                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 855                 osl(osl_rbtree_loop_reverse(ui->table, UT_FILES, &usi,
 856                         user_stats_loop_function));
 857         }
 858 }
 859
 860 static int print_statistics(void)
 861 {
 862         int ret;
 863         struct global_stats_info gsi = {
 864                 .count = conf.limit_arg,
 865                 .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
 866         };
 867
 868         printf("----------------- Largest dirs -------------------\n");
 869         ret = osl(osl_rbtree_loop_reverse(dir_table, DT_BYTES, &gsi,
 870                 global_stats_loop_function));
 871         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 872                 return ret;
 873         gsi.count = conf.limit_arg;
 874
 875         gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 876         printf("---------- dirs containing most files ------------\n");
 877         ret = osl(osl_rbtree_loop_reverse(dir_table, DT_FILES, &gsi,
 878                 global_stats_loop_function));
 879         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 880                 return ret;
 881
 882         printf("------------------ Global summary (dirs/files/bytes)\n"
 883                 "%llu\t%llu\t%llu\n",
 884                 (long long unsigned)num_dirs, (long long unsigned)num_files,
 885                 (long long unsigned)num_bytes);
 886         print_user_stats();
 887         print_id_stats();
 888         return 1;
 889 }
 890
 891 static char *get_uid_list_name(void)
 892 {
 893         return make_message("%s/uid_list", conf.database_dir_arg);
 894 }
 895
 896 static int write_uid_list(void)
 897 {
 898         char *buf, *filename;
 899         uint32_t count = 0;
 900         struct user_info *ui;
 901         size_t size = num_uids * sizeof(uint32_t);
 902         int ret;
 903
 904         if (!num_uids)
 905                 return 0;
 906         buf = para_malloc(size);
 907         FOR_EACH_USER(ui) {
 908                 if (!ui_used(ui) || !ui_admissible(ui))
 909                         continue;
 910                 DEBUG_LOG("saving uid %u\n", (unsigned) ui->uid);
 911                 write_u32(buf + count++ * sizeof(uint32_t), ui->uid);
 912         }
 913         filename = get_uid_list_name();
 914         ret = para_write_file(filename, buf, size);
 915         free(filename);
 916         free(buf);
 917         return ret;
 918 }
 919
 920 static int open_dir_table(void)
 921 {
 922         if (!dir_table_desc.dir) /* we did not create the table */
 923                 dir_table_desc.dir = para_strdup(conf.database_dir_arg);
 924         return osl(osl_open_table(&dir_table_desc, &dir_table));
 925 }
 926
 927 static void close_dir_table(void)
 928 {
 929         int ret;
 930
 931         if (!dir_table)
 932                 return;
 933         ret = osl(osl_close_table(dir_table, OSL_MARK_CLEAN));
 934         if (ret < 0)
 935                 ERROR_LOG("failed to close dir table: %s\n", adu_strerror(-ret));
 936         free((char *)dir_table_desc.dir);
 937         dir_table = NULL;
 938 }
 939
 940 static void close_user_table(struct user_info *ui)
 941 {
 942         int ret;
 943
 944         if (!ui || !ui_used(ui) || !ui_admissible(ui))
 945                 return;
 946         ret = osl(osl_close_table(ui->table, OSL_MARK_CLEAN));
 947         if (ret < 0)
 948                 ERROR_LOG("failed to close user table %u: %s\n",
 949                         (unsigned) ui->uid, adu_strerror(-ret));
 950         free((char *)ui->desc->name);
 951         ui->desc->name = NULL;
 952         free((char *)ui->desc->dir);
 953         ui->desc->dir = NULL;
 954         free(ui->desc);
 955         ui->desc = NULL;
 956         ui->table = NULL;
 957         ui->flags = 0;
 958 }
 959
 960 static void close_user_tables(void)
 961 {
 962         struct user_info *ui;
 963
 964         FOR_EACH_USER(ui)
 965                 close_user_table(ui);
 966 }
 967
 968 static void close_all_tables(void)
 969 {
 970         close_dir_table();
 971         close_user_tables();
 972         free_hash_table();
 973 }
 974
 975 static int com_create()
 976 {
 977         uint64_t zero = 0ULL;
 978         int ret = create_tables();
 979
 980         if (ret < 0)
 981                 return ret;
 982         ret = open_dir_table();
 983         if (ret < 0)
 984                 return ret;
 985         ret = scan_dir(conf.base_dir_arg, &zero);
 986         if (ret < 0)
 987                 goto out;
 988         ret = write_uid_list();
 989 out:
 990         close_all_tables();
 991         return ret;
 992 }
 993
 994 static int read_uid_file(void)
 995 {
 996         size_t size;
 997         uint32_t n;
 998         char *filename = get_uid_list_name(), *map;
 999         int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
1000
1001         if (ret < 0) {
1002                 INFO_LOG("failed to map %s\n", filename);
1003                 free(filename);
1004                 return ret;
1005         }
1006         num_uids = size / 4;
1007         INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
1008         free(filename);
1009         /* hash table size should be a power of two and larger than the number of uids */
1010         uid_hash_table_size = 4;
1011         while (uid_hash_table_size < num_uids)
1012                 uid_hash_table_size *= 2;
1013         create_hash_table();
1014         for (n = 0; n < num_uids; n++) {
1015                 uint32_t uid = read_u32(map + n * sizeof(uid));
1016                 ret = search_uid(uid, OPEN_USER_TABLE, NULL);
1017                 if (ret < 0)
1018                         goto out;
1019         }
1020 out:
1021         para_munmap(map, size);
1022         return ret;
1023 }
1024
1025 static int com_select(void)
1026 {
1027         int ret;
1028
1029         ret = open_dir_table();
1030         if (ret < 0)
1031                 return ret;
1032         ret = read_uid_file();
1033         if (ret < 0)
1034                 return ret;
1035         ret = print_statistics();
1036         close_all_tables();
1037         return ret;
1038 }
1039
1040 static int check_args(void)
1041 {
1042         int i, ret;
1043
1044         if (!conf.uid_given)
1045                 return 0;
1046
1047         admissible_uids = para_malloc(conf.uid_given * sizeof(*admissible_uids));
1048
1049         for (i = 0; i < conf.uid_given; i++) {
1050                 ret = parse_uid_range(conf.uid_arg[i], admissible_uids + i);
1051                 if (ret < 0)
1052                         goto err;
1053         }
1054         return 1;
1055 err:
1056         free(admissible_uids);
1057         admissible_uids = NULL;
1058         return ret;
1059 }
1060
1061 int main(int argc, char **argv)
1062 {
1063         int ret;
1064         struct cmdline_parser_params params = {
1065                 .override = 0,
1066                 .initialize = 1,
1067                 .check_required = 0,
1068                 .check_ambiguity = 0,
1069                 .print_errors = 1
1070         };
1071
1072         cmdline_parser_ext(argc, argv, &conf, &params); /* aborts on errors */
1073         ret = check_args();
1074         if (ret < 0)
1075                 goto out;
1076         ret = -E_SYNTAX;
1077         if (conf.select_given)
1078                 ret = com_select();
1079         else
1080                 ret = com_create();
1081         if (ret < 0)
1082                 goto out;
1083 out:
1084         free(admissible_uids);
1085         if (ret < 0) {
1086                 ERROR_LOG("%s\n", adu_strerror(-ret));
1087                 return -EXIT_FAILURE;
1088         }
1089         return EXIT_SUCCESS;
1090 }