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 /** Command line and config file options. */
  14 static struct gengetopt_args_info conf;
  15
  16 enum uid_info_flags {
  17         /** whether this slot of the hash table is used. */
  18         UI_FL_SLOT_USED = 1,
  19         /** whether this uid should be taken into account. */
  20         UI_FL_ADMISSIBLE = 2,
  21 };
  22
  23 struct user_info {
  24         uint32_t uid;
  25         uint32_t flags;
  26         struct osl_table *table;
  27         uint64_t files;
  28         uint64_t bytes;
  29         uint64_t dirs;
  30         struct osl_table_description *desc;
  31 };
  32
  33 /**
  34  * Contains info for each user that owns at least one regular file.
  35  *
  36  * Even users that are not taken into account because of the --uid
  37  * option occupy a slot in this hash table. This allows to find out
  38  * quicky whether a uid is admissible. And yes, this has to be fast.
  39  */
  40 static struct user_info *uid_hash_table;
  41
  42 static inline int ui_used(struct user_info *ui)
  43 {
  44         return ui->flags & UI_FL_SLOT_USED;
  45 }
  46
  47 static inline int ui_admissible(struct user_info *ui)
  48 {
  49         return ui->flags & UI_FL_ADMISSIBLE;
  50 }
  51
  52 struct uid_range {
  53         uint32_t low;
  54         uint32_t high;
  55 };
  56
  57 static struct uid_range *admissible_uids;
  58
  59 static inline int check_uid_arg(const char *arg, uint32_t *uid)
  60 {
  61         const uint32_t max = ~0U;
  62         /*
  63          * we need an 64-bit int for string -> uid conversion because strtoll()
  64          * returns a signed value.
  65          */
  66         int64_t val;
  67         int ret = para_atoi64(arg, &val);
  68
  69         if (ret < 0)
  70                 return ret;
  71         if (val < 0 || val > max)
  72                 return -ERRNO_TO_ERROR(EINVAL);
  73         *uid = val;
  74         return 1;
  75 }
  76
  77 static int parse_uid_range(const char *orig_arg, struct uid_range *ur)
  78 {
  79         int ret;
  80         char *arg = para_strdup(orig_arg), *p = strchr(arg, '-');
  81
  82         if (!p || p == arg) {
  83                 if (p == arg) /* -42 */
  84                         p++;
  85                 ret = check_uid_arg(p, &ur->high);
  86                 if (ret < 0)
  87                         goto out;
  88                 ur->low = p? 0 : ur->high;
  89                 ret = 1;
  90                 goto out;
  91         }
  92         /* 42- or 42-4711 */
  93         *p = '\0';
  94         p++;
  95         ret = check_uid_arg(arg, &ur->low);
  96         if (ret < 0)
  97                 goto out;
  98         ur->high = ~0U;
  99         if (*p) { /* 42-4711 */
 100                 ret = check_uid_arg(p, &ur->high);
 101                 if (ret < 0)
 102                         goto out;
 103         }
 104         if (ur->low > ur->high)
 105                 ret = -ERRNO_TO_ERROR(EINVAL);
 106 out:
 107         if (ret < 0)
 108                 ERROR_LOG("bad uid option: %s\n", orig_arg);
 109         else
 110                 INFO_LOG("admissible uid range: %u - %u\n", ur->low,
 111                         ur->high);
 112         free(arg);
 113         return ret;
 114 }
 115
 116
 117 /** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
 118 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
 119
 120 /**
 121  * The log function.
 122  *
 123  * \param ll Loglevel.
 124  * \param fml Usual format string.
 125  *
 126  * All XXX_LOG() macros use this function.
 127  */
 128 __printf_2_3 void __log(int ll, const char* fmt,...)
 129 {
 130         va_list argp;
 131         FILE *outfd;
 132         struct tm *tm;
 133         time_t t1;
 134         char str[255] = "";
 135
 136         if (ll < conf.loglevel_arg)
 137                 return;
 138         outfd = stderr;
 139         time(&t1);
 140         tm = localtime(&t1);
 141         strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
 142         fprintf(outfd, "%s ", str);
 143         va_start(argp, fmt);
 144         vfprintf(outfd, fmt, argp);
 145         va_end(argp);
 146 }
 147
 148 /**
 149  * Compare the size of two directories
 150  *
 151  * \param obj1 Pointer to the first object.
 152  * \param obj2 Pointer to the second object.
 153  *
 154  * This function first compares the size values as usual integers. If they compare as
 155  * equal, the address of \a obj1 and \a obj2 are compared. So this compare function
 156  * returns zero if and only if \a obj1 and \a obj2 point to the same memory area.
 157  */
 158 static int size_compare(const struct osl_object *obj1, const struct osl_object *obj2)
 159 {
 160         uint64_t d1 = *(uint64_t *)obj1->data;
 161         uint64_t d2 = *(uint64_t *)obj2->data;
 162         int ret = NUM_COMPARE(d2, d1);
 163
 164         if (ret)
 165                 return ret;
 166         //INFO_LOG("addresses: %p, %p\n", obj1->data, obj2->data);
 167         return NUM_COMPARE(obj2->data, obj1->data);
 168 }
 169
 170 /**
 171  * Compare two osl objects pointing to unsigned integers of 64 bit size.
 172  *
 173  * \param obj1 Pointer to the first integer.
 174  * \param obj2 Pointer to the second integer.
 175  *
 176  * \return The values required for an osl compare function.
 177  *
 178  * \sa osl_compare_func, osl_hash_compare().
 179  */
 180 static int uint64_compare(const struct osl_object *obj1,
 181                 const struct osl_object *obj2)
 182 {
 183         uint64_t d1 = read_u64((const char *)obj1->data);
 184         uint64_t d2 = read_u64((const char *)obj2->data);
 185
 186         if (d1 < d2)
 187                 return 1;
 188         if (d1 > d2)
 189                 return -1;
 190         return 0;
 191 }
 192
 193 /** The columns of the directory table. */
 194 enum dir_table_columns {
 195         /** The name of the directory. */
 196         DT_NAME,
 197         /** The dir count number. */
 198         DT_NUM,
 199         /** The number of the parent directory. */
 200         DT_PARENT_NUM,
 201         /** The number of bytes of all regular files. */
 202         DT_BYTES,
 203         /** The number of all regular files. */
 204         DT_FILES,
 205         /** Number of columns in this table. */
 206         NUM_DT_COLUMNS
 207 };
 208
 209 static struct osl_column_description dir_table_cols[] = {
 210         [DT_NAME] = {
 211                 .storage_type = OSL_MAPPED_STORAGE,
 212                 .storage_flags = 0,
 213                 .name = "dir",
 214         },
 215         [DT_NUM] = {
 216                 .storage_type = OSL_MAPPED_STORAGE,
 217                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 218                 .name = "num",
 219                 .compare_function = uint64_compare,
 220                 .data_size = sizeof(uint64_t)
 221         },
 222         [DT_PARENT_NUM] = {
 223                 .storage_type = OSL_MAPPED_STORAGE,
 224                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 225                 .name = "parent_num",
 226                 .compare_function = size_compare,
 227                 .data_size = sizeof(uint64_t)
 228         },
 229         [DT_BYTES] = {
 230                 .storage_type = OSL_MAPPED_STORAGE,
 231                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 232                 .compare_function = size_compare,
 233                 .name = "num_bytes",
 234                 .data_size = sizeof(uint64_t)
 235         },
 236         [DT_FILES] = {
 237                 .storage_type = OSL_MAPPED_STORAGE,
 238                 .storage_flags =  OSL_RBTREE | OSL_FIXED_SIZE,
 239                 .compare_function = size_compare,
 240                 .name = "num_files",
 241                 .data_size = sizeof(uint64_t)
 242         }
 243 };
 244
 245 static struct osl_table_description dir_table_desc = {
 246         .name = "dir_table",
 247         .num_columns = NUM_DT_COLUMNS,
 248         .flags = 0,
 249         .column_descriptions = dir_table_cols,
 250 };
 251
 252 /** The columns of the id table. */
 253 enum user_table_columns {
 254         /** The numer of the directory. */
 255         UT_DIR_NUM,
 256         /** The number of bytes of all regular files in this dir owned by this id. */
 257         UT_BYTES,
 258         /** The number of files in this dir owned by this id. */
 259         UT_FILES,
 260         /** Number of columns in this table. */
 261         NUM_UT_COLUMNS
 262 };
 263
 264 static struct osl_column_description user_table_cols[] = {
 265         [UT_DIR_NUM] = {
 266                 .storage_type = OSL_MAPPED_STORAGE,
 267                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
 268                 .name = "dir_num",
 269                 .compare_function = uint64_compare,
 270                 .data_size = sizeof(uint64_t)
 271         },
 272         [UT_BYTES] = {
 273                 .storage_type = OSL_MAPPED_STORAGE,
 274                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 275                 .compare_function = size_compare,
 276                 .name = "num_bytes",
 277                 .data_size = sizeof(uint64_t)
 278         },
 279         [UT_FILES] = {
 280                 .storage_type = OSL_MAPPED_STORAGE,
 281                 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE,
 282                 .compare_function = size_compare,
 283                 .name = "num_files",
 284                 .data_size = sizeof(uint64_t)
 285         },
 286 };
 287
 288 static struct osl_table *dir_table;
 289
 290 static int add_directory(char *dirname, uint64_t *dir_num, uint64_t *parent_dir_num,
 291                 uint64_t *dir_size, uint64_t *dir_files)
 292 {
 293         struct osl_object dir_objects[NUM_DT_COLUMNS];
 294
 295         INFO_LOG("adding #%llu: %s\n", (long long unsigned)*dir_num, dirname);
 296         dir_objects[DT_NAME].data = dirname;
 297         dir_objects[DT_NAME].size = strlen(dirname) + 1;
 298         dir_objects[DT_NUM].data = dir_num;
 299         dir_objects[DT_NUM].size = sizeof(*dir_num);
 300         dir_objects[DT_PARENT_NUM].data = parent_dir_num;
 301         dir_objects[DT_PARENT_NUM].size = sizeof(*parent_dir_num);
 302         dir_objects[DT_BYTES].data = dir_size;
 303         dir_objects[DT_BYTES].size = sizeof(*dir_size);
 304         dir_objects[DT_FILES].data = dir_files;
 305         dir_objects[DT_FILES].size = sizeof(*dir_files);
 306
 307         return 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_create_table(ui->desc);
 326                 if (ret < 0)
 327                         goto err;
 328                 num_uids++;
 329         }
 330         ret = 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_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_get_row(t, UT_DIR_NUM, &obj, &row);
 462
 463         if (ret < 0 && ret != -E_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_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_get_object(t, row, UT_BYTES, &obj1);
 484                 if (ret < 0)
 485                         return ret;
 486                 num = *(uint64_t *)obj1.data + *add;
 487                 ret = osl_update_object(t, row, UT_BYTES, &obj2);
 488                 if (ret < 0)
 489                         return ret;
 490                 ret = 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_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_get_row(dir_table, DT_NUM, &obj, &row);
 580         if (ret < 0)
 581                 goto out;
 582         ret = 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_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_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_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_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_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_row *dir_row;
 778         struct osl_object obj;
 779         int ret, summary = usi->flags & GSF_COMPUTE_SUMMARY;
 780         char formated_value[25];
 781
 782         if (!usi->count && !summary)
 783                 return -E_LOOP_COMPLETE;
 784         if (usi->count && (usi->flags & USF_PRINT_DIRNAME)) {
 785                 char *dirname;
 786                 ret = osl_get_object(usi->ui->table, row, UT_DIR_NUM, &obj);
 787                 if (ret < 0)
 788                         return ret;
 789                 ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
 790                 if (ret < 0)
 791                         return ret;
 792                 printf("%s%s",
 793                         dirname,
 794                         (usi->flags & (USF_PRINT_FILES | USF_PRINT_BYTES))?
 795                                 "\t" : "\n"
 796                 );
 797         }
 798         if (summary || (usi->count && (usi->flags & USF_PRINT_FILES))) {
 799                 uint64_t files;
 800                 ret = osl_get_object(usi->ui->table, row, UT_FILES, &obj);
 801                 if (ret < 0)
 802                         return ret;
 803                 files = *(uint64_t *)obj.data;
 804                 if (usi->count && (usi->flags & USF_PRINT_FILES)) {
 805                         format_size_value(conf.size_unit_arg, files,
 806                                 formated_value);
 807                         printf("%s%s", formated_value,
 808                                 (usi->flags & USF_PRINT_BYTES)? "\t" : "\n"
 809                         );
 810                 }
 811                 if (summary)
 812                         usi->ui->files += files;
 813         }
 814         if (summary || (usi->count && (usi->flags & USF_PRINT_BYTES))) {
 815                 uint64_t bytes;
 816                 ret = osl_get_object(usi->ui->table, row, UT_BYTES, &obj);
 817                 if (ret < 0)
 818                         return ret;
 819                 bytes = *(uint64_t *)obj.data;
 820                 if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
 821                         format_size_value(conf.size_unit_arg, bytes,
 822                                 formated_value);
 823                         printf("%s\n", formated_value);
 824                 }
 825                 if (summary) {
 826                         usi->ui->bytes += bytes;
 827                         usi->ui->dirs++;
 828                 }
 829
 830         }
 831         if (usi->count > 0)
 832                 usi->count--;
 833         return 1;
 834 }
 835
 836 static void print_user_stats(void)
 837 {
 838         struct user_info *ui;
 839
 840         FOR_EACH_USER(ui) {
 841                 struct user_stats_info usi = {
 842                         .count = conf.limit_arg,
 843                         .ui = ui
 844                 };
 845                 if (!ui_used(ui) || !ui_admissible(ui))
 846                         continue;
 847                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
 848                 printf("************************************************ uid %u\n",
 849                         (unsigned) ui->uid);
 850                 printf("----------------- Largest dirs -------------------\n");
 851                 osl_rbtree_loop_reverse(ui->table, UT_BYTES, &usi,
 852                         user_stats_loop_function);
 853                 printf("---------- dirs containing most files ------------\n");
 854                 usi.count = conf.limit_arg,
 855                 usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 856                 osl_rbtree_loop_reverse(ui->table, UT_FILES, &usi,
 857                         user_stats_loop_function);
 858         }
 859 }
 860
 861 static int print_statistics(void)
 862 {
 863         int ret;
 864         struct global_stats_info gsi = {
 865                 .count = conf.limit_arg,
 866                 .flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
 867         };
 868
 869         printf("----------------- Largest dirs -------------------\n");
 870         ret = osl_rbtree_loop_reverse(dir_table, DT_BYTES, &gsi,
 871                 global_stats_loop_function);
 872         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 873                 return ret;
 874         gsi.count = conf.limit_arg;
 875
 876         gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
 877         printf("---------- dirs containing most files ------------\n");
 878         ret = osl_rbtree_loop_reverse(dir_table, DT_FILES, &gsi,
 879                 global_stats_loop_function);
 880         if (ret < 0 && ret != -E_LOOP_COMPLETE)
 881                 return ret;
 882
 883         printf("------------------ Global summary (dirs/files/bytes)\n"
 884                 "%llu\t%llu\t%llu\n",
 885                 (long long unsigned)num_dirs, (long long unsigned)num_files,
 886                 (long long unsigned)num_bytes);
 887         print_user_stats();
 888         print_id_stats();
 889         return 1;
 890 }
 891
 892 static char *get_uid_list_name(void)
 893 {
 894         return make_message("%s/uid_list", conf.database_dir_arg);
 895 }
 896
 897 static int write_uid_list(void)
 898 {
 899         char *buf, *filename;
 900         uint32_t count = 0;
 901         struct user_info *ui;
 902         size_t size = num_uids * sizeof(uint32_t);
 903         int ret;
 904
 905         if (!num_uids)
 906                 return 0;
 907         buf = para_malloc(size);
 908         FOR_EACH_USER(ui) {
 909                 if (!ui_used(ui) || !ui_admissible(ui))
 910                         continue;
 911                 DEBUG_LOG("saving uid %u\n", (unsigned) ui->uid);
 912                 write_u32(buf + count++ * sizeof(uint32_t), ui->uid);
 913         }
 914         filename = get_uid_list_name();
 915         ret = para_write_file(filename, buf, size);
 916         free(filename);
 917         free(buf);
 918         return ret;
 919 }
 920
 921 static int open_dir_table(void)
 922 {
 923         if (!dir_table_desc.dir) /* we did not create the table */
 924                 dir_table_desc.dir = para_strdup(conf.database_dir_arg);
 925         return osl_open_table(&dir_table_desc, &dir_table);
 926 }
 927
 928 static void close_dir_table(void)
 929 {
 930         int ret;
 931
 932         if (!dir_table)
 933                 return;
 934         ret = osl_close_table(dir_table, OSL_MARK_CLEAN);
 935         if (ret < 0)
 936                 ERROR_LOG("failed to close dir table: %s\n", error_txt(-ret));
 937         free((char *)dir_table_desc.dir);
 938         dir_table = NULL;
 939 }
 940
 941 static void close_user_table(struct user_info *ui)
 942 {
 943         int ret;
 944
 945         if (!ui || !ui_used(ui) || !ui_admissible(ui))
 946                 return;
 947         ret = osl_close_table(ui->table, OSL_MARK_CLEAN);
 948         if (ret < 0)
 949                 ERROR_LOG("failed to close user table %u: %s\n",
 950                         (unsigned) ui->uid, error_txt(-ret));
 951         free((char *)ui->desc->name);
 952         ui->desc->name = NULL;
 953         free((char *)ui->desc->dir);
 954         ui->desc->dir = NULL;
 955         free(ui->desc);
 956         ui->desc = NULL;
 957         ui->table = NULL;
 958         ui->flags = 0;
 959 }
 960
 961 static void close_user_tables(void)
 962 {
 963         struct user_info *ui;
 964
 965         FOR_EACH_USER(ui)
 966                 close_user_table(ui);
 967 }
 968
 969 static void close_all_tables(void)
 970 {
 971         close_dir_table();
 972         close_user_tables();
 973         free_hash_table();
 974 }
 975
 976 static int com_create()
 977 {
 978         uint64_t zero = 0ULL;
 979         int ret = create_tables();
 980
 981         if (ret < 0)
 982                 return ret;
 983         ret = open_dir_table();
 984         if (ret < 0)
 985                 return ret;
 986         ret = scan_dir(conf.base_dir_arg, &zero);
 987         if (ret < 0)
 988                 goto out;
 989         ret = write_uid_list();
 990 out:
 991         close_all_tables();
 992         return ret;
 993 }
 994
 995 static int read_uid_file(void)
 996 {
 997         size_t size;
 998         uint32_t n;
 999         char *filename = get_uid_list_name(), *map;
1000         int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
1001
1002         if (ret < 0) {
1003                 INFO_LOG("failed to map %s\n", filename);
1004                 free(filename);
1005                 return ret;
1006         }
1007         num_uids = size / 4;
1008         INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
1009         free(filename);
1010         /* hash table size should be a power of two and larger than the number of uids */
1011         uid_hash_table_size = 4;
1012         while (uid_hash_table_size < num_uids)
1013                 uid_hash_table_size *= 2;
1014         create_hash_table();
1015         for (n = 0; n < num_uids; n++) {
1016                 uint32_t uid = read_u32(map + n * sizeof(uid));
1017                 ret = search_uid(uid, OPEN_USER_TABLE, NULL);
1018                 if (ret < 0)
1019                         goto out;
1020         }
1021 out:
1022         para_munmap(map, size);
1023         return ret;
1024 }
1025
1026 static int com_select(void)
1027 {
1028         int ret;
1029
1030         ret = open_dir_table();
1031         if (ret < 0)
1032                 return ret;
1033         ret = read_uid_file();
1034         if (ret < 0)
1035                 return ret;
1036         ret = print_statistics();
1037         close_all_tables();
1038         return ret;
1039 }
1040
1041 static int check_args(void)
1042 {
1043         int i, ret;
1044
1045         if (!conf.uid_given)
1046                 return 0;
1047
1048         admissible_uids = para_malloc(conf.uid_given * sizeof(*admissible_uids));
1049
1050         for (i = 0; i < conf.uid_given; i++) {
1051                 ret = parse_uid_range(conf.uid_arg[i], admissible_uids + i);
1052                 if (ret < 0)
1053                         goto err;
1054         }
1055         return 1;
1056 err:
1057         free(admissible_uids);
1058         admissible_uids = NULL;
1059         return ret;
1060 }
1061
1062 int main(int argc, char **argv)
1063 {
1064         int ret;
1065         struct cmdline_parser_params params = {
1066                 .override = 0,
1067                 .initialize = 1,
1068                 .check_required = 0,
1069                 .check_ambiguity = 0,
1070                 .print_errors = 1
1071         };
1072
1073         cmdline_parser_ext(argc, argv, &conf, &params); /* aborts on errors */
1074         ret = check_args();
1075         if (ret < 0)
1076                 goto out;
1077         ret = -E_SYNTAX;
1078         if (conf.select_given)
1079                 ret = com_select();
1080         else
1081                 ret = com_create();
1082         if (ret < 0)
1083                 goto out;
1084 out:
1085         free(admissible_uids);
1086         if (ret < 0) {
1087                 ERROR_LOG("%s\n", error_txt(-ret));
1088                 return -EXIT_FAILURE;
1089         }
1090         return EXIT_SUCCESS;
1091 }