source3/utils/net_idmap_check.c

   1 /*
   2  * Samba Unix/Linux SMB client library
   3  *
   4  * Copyright (C) Gregor Beck 2011
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /**
  21  * @brief  Check the idmap database.
  22  * @author Gregor Beck <gb@sernet.de>
  23  * @date   Mar 2011
  24  */
  25
  26 #include "net_idmap_check.h"
  27 #include "includes.h"
  28 #include "system/filesys.h"
  29 #include "dbwrap/dbwrap.h"
  30 #include "dbwrap/dbwrap_open.h"
  31 #include "dbwrap/dbwrap_rbt.h"
  32 #include "net.h"
  33 #include "../libcli/security/dom_sid.h"
  34 #include "cbuf.h"
  35 #include "srprs.h"
  36 #include "util_tdb.h"
  37 #include "interact.h"
  38
  39 static int traverse_commit(struct db_record *diff_rec, void* data);
  40 static int traverse_check(struct db_record *rec, void* data);
  41
  42 /* TDB_DATA *******************************************************************/
  43 static char*    print_data(TALLOC_CTX* mem_ctx, TDB_DATA d);
  44 static TDB_DATA parse_data(TALLOC_CTX* mem_ctx, const char** ptr);
  45 static TDB_DATA talloc_copy(TALLOC_CTX* mem_ctx, TDB_DATA data);
  46 static bool is_empty(TDB_DATA data) {
  47         return (data.dsize == 0) || (data.dptr == NULL);
  48 }
  49
  50 /* record *********************************************************************/
  51
  52 enum DT {
  53         DT_INV = 0,
  54         DT_SID, DT_UID, DT_GID,
  55         DT_HWM, DT_VER, DT_SEQ,
  56 };
  57
  58 struct record {
  59         enum DT key_type, val_type;
  60         TDB_DATA key, val;
  61         struct dom_sid sid;
  62         long unsigned  id;
  63 };
  64
  65 static struct record* parse_record(TALLOC_CTX* ctx, TDB_DATA key, TDB_DATA val);
  66 static struct record* reverse_record(struct record* rec);
  67
  68 static bool is_invalid(const struct record* r) {
  69         return (r->key_type == DT_INV) || (r->val_type == DT_INV);
  70 }
  71
  72 static bool is_map(const struct record* r) {
  73         return (r->key_type == DT_SID)
  74                 || (r->key_type == DT_UID) || (r->key_type == DT_GID);
  75 }
  76
  77 /* action *********************************************************************/
  78
  79 typedef struct check_action {
  80         const char* fmt;
  81         const char* name;
  82         const char* prompt;
  83         const char* answers;
  84         char auto_action;
  85         char default_action;
  86         bool verbose;
  87 } check_action;
  88
  89 struct check_actions {
  90         check_action invalid_record;
  91         check_action missing_reverse;
  92         check_action invalid_mapping;
  93         check_action invalid_edit;
  94         check_action record_exists;
  95         check_action no_version;
  96         check_action wrong_version;
  97         check_action invalid_hwm;
  98         check_action commit;
  99         check_action valid_mapping;
 100         check_action valid_other;
 101         check_action invalid_diff;
 102 };
 103
 104 static struct check_actions
 105 check_actions_init(const struct check_options* opts) {
 106         struct check_actions ret = {
 107                 .invalid_record = (check_action) {
 108                         .name = "Invalid record",
 109                         .prompt = "[e]dit/[d]elete/[D]elete all"
 110                         "/[s]kip/[S]kip all",
 111                         .answers = "eds",
 112                         .default_action = 'e',
 113                         .verbose = true,
 114                 },
 115                 .missing_reverse = (check_action) {
 116                         .name = "Missing reverse mapping for",
 117                         .prompt = "[f]ix/[F]ix all/[e]dit/[d]elete/[D]elete all"
 118                         "/[s]kip/[S]kip all",
 119                         .answers = "feds",
 120                         .default_action = 'f',
 121                         .verbose = true,
 122                 },
 123                 .invalid_mapping = (check_action) {
 124                         .fmt = "%1$s: %2$s -> %3$s\n(%4$s <- %3$s)\n",
 125                         .name = "Invalid mapping",
 126                         .prompt = "[e]dit/[d]elete/[D]elete all"
 127                         "/[s]kip/[S]kip all",
 128                         .answers = "eds",
 129                         .default_action = 'd',
 130                         .verbose = true,
 131                 },
 132                 .invalid_edit = (check_action) {
 133                         .name = "Invalid record",
 134                         .prompt = "[e]dit/[d]elete/[D]elete all"
 135                         "/[s]kip/[S]kip all",
 136                         .answers = "eds",
 137                         .default_action = 'e',
 138                         .verbose = true,
 139                 },
 140                 .record_exists = (check_action) {
 141                         .fmt = "%1$s: %2$s\n-%4$s\n+%3$s\n",
 142                         .name = "Record exists",
 143                         .prompt = "[o]verwrite/[O]verwrite all/[e]dit"
 144                         "/[d]elete/[D]elete all/[s]kip/[S]kip all",
 145                         .answers = "oeds",
 146                         .default_action = 'o',
 147                         .verbose = true,
 148                 },
 149                 .no_version = (check_action) {
 150                         .prompt = "[f]ix/[s]kip/[a]bort",
 151                         .answers = "fsa",
 152                         .default_action = 'f',
 153                 },
 154                 .wrong_version = (check_action) {
 155                         .prompt = "[f]ix/[s]kip/[a]bort",
 156                         .answers = "fsa",
 157                         .default_action = 'a',
 158                 },
 159                 .invalid_hwm = (check_action) {
 160                         .prompt = "[f]ix/[s]kip",
 161                         .answers = "fs",
 162                         .default_action = 'f',
 163                 },
 164                 .commit = (check_action) {
 165                         .prompt = "[c]ommit/[l]ist/[s]kip",
 166                         .answers = "cls",
 167                         .default_action = 'l',
 168                         .verbose = true,
 169                 },
 170                 .valid_mapping = (check_action) {
 171                         .fmt = "%1$s: %2$s <-> %3$s\n",
 172                         .name = "Mapping",
 173                         .auto_action = 's',
 174                         .verbose = opts->verbose,
 175                 },
 176                 .valid_other = (check_action) {
 177                         .name = "Other",
 178                         .auto_action = 's',
 179                         .verbose = opts->verbose,
 180                 },
 181                 .invalid_diff = (check_action) {
 182                         .prompt = "[s]kip/[S]kip all/[c]ommit/[C]ommit all"
 183                         "/[a]bort",
 184                         .answers = "sca",
 185                         .default_action = 's',
 186                 },
 187         };
 188
 189         if (!opts->repair) {
 190                 ret.invalid_record.auto_action  = 's';
 191                 ret.missing_reverse.auto_action = 's';
 192                 ret.invalid_mapping.auto_action = 's';
 193                 ret.no_version.auto_action      = 's';
 194                 ret.wrong_version.auto_action   = 's';
 195                 ret.invalid_hwm.auto_action     = 's';
 196                 ret.commit.auto_action          = 's';
 197         }
 198
 199         if (opts->automatic) {
 200                 ret.invalid_record.auto_action  = 'd'; /* delete */
 201                 ret.missing_reverse.auto_action = 'f'; /* fix */
 202                 ret.invalid_mapping.auto_action = 'd'; /* delete */
 203                 ret.no_version.auto_action      = 'f'; /* fix */
 204                 ret.wrong_version.auto_action   = 'a'; /* abort */
 205                 ret.invalid_hwm.auto_action     = 'f'; /* fix */
 206                 ret.commit.auto_action          = 'c'; /* commit */
 207                 ret.invalid_diff.auto_action    = 'a'; /* abort */
 208                 if (opts->force) {
 209                         ret.wrong_version.auto_action   = 'f'; /* fix */
 210                         ret.invalid_diff.auto_action    = 'c'; /* commit */
 211                 }
 212         }
 213         if (opts->test) {
 214                 ret.invalid_diff.auto_action    = 'c'; /* commit */
 215 /*              ret.commit.auto_action          = 'c';*/ /* commit */
 216         }
 217
 218         return ret;
 219 }
 220
 221 static char get_action(struct check_action* a, struct record* r, TDB_DATA* v) {
 222         char ret;
 223         if (a->verbose && (r != NULL)) {
 224                 if (!a->fmt) {
 225                         d_printf("%s: %s ", a->name, print_data(r, r->key));
 226                         if (is_map(r)) {
 227                                 d_printf("-> %s\n", print_data(r, r->val));
 228                         } else if (r->key_type == DT_HWM ||
 229                                    r->key_type == DT_VER ||
 230                                    r->key_type == DT_SEQ)
 231                         {
 232                                 d_printf(": %ld\n", r->id);
 233                         } else {
 234                                 d_printf("\n");
 235                         }
 236                 } else {
 237                         d_printf(a->fmt, a->name,
 238                                  print_data(r, r->key),
 239                                  print_data(r, r->val),
 240                                  (v ? print_data(r, *v) : ""));
 241                 }
 242         }
 243
 244         if (a->auto_action != '\0') {
 245                 return a->auto_action;
 246         }
 247
 248         ret = interact_prompt(a->prompt, a->answers, a->default_action);
 249
 250         if (isupper(ret)) {
 251                 ret = tolower(ret);
 252                 a->auto_action = ret;
 253         }
 254         a->default_action = ret;
 255         return ret;
 256 }
 257
 258 /*  *************************************************************************/
 259
 260 typedef struct {
 261         TDB_DATA oval, nval;
 262 } TDB_DATA_diff;
 263
 264 static TDB_DATA pack_diff(TDB_DATA_diff* diff) {
 265         return (TDB_DATA) {
 266                 .dptr = (uint8_t *)diff,
 267                 .dsize = sizeof(TDB_DATA_diff),
 268         };
 269 }
 270
 271 static TDB_DATA_diff unpack_diff(TDB_DATA data) {
 272         assert(data.dsize == sizeof(TDB_DATA_diff));
 273         return *(TDB_DATA_diff*)data.dptr;
 274 }
 275
 276 #define DEBUG_DIFF(LEV,MEM,MSG,KEY,OLD,NEW)                     \
 277         DEBUG(LEV, ("%s: %s\n", MSG, print_data(MEM, KEY)));    \
 278         if (!is_empty(OLD)) {                                   \
 279                 DEBUGADD(LEV, ("-%s\n", print_data(MEM, OLD))); \
 280         }                                                       \
 281         if (!is_empty(NEW)) {                                   \
 282                 DEBUGADD(LEV, ("+%s\n", print_data(MEM, NEW))); \
 283         }
 284
 285 struct check_ctx {
 286         int oflags;
 287         char* name;
 288         bool transaction;
 289         struct db_context *db;
 290         struct db_context *diff;
 291         struct check_actions action;
 292
 293         uint32_t uid_hwm;
 294         uint32_t gid_hwm;
 295
 296         unsigned n_invalid_record;
 297         unsigned n_missing_reverse;
 298         unsigned n_invalid_mappping;
 299         unsigned n_map;
 300         unsigned n_other;
 301         unsigned n_diff;
 302         struct check_options opts;
 303 };
 304
 305
 306 static void adjust_hwm(struct check_ctx* ctx, const struct record* r);
 307
 308 static int add_record(struct check_ctx* ctx, TDB_DATA key, TDB_DATA value)
 309 {
 310         NTSTATUS status;
 311         TDB_DATA_diff diff;
 312         TALLOC_CTX* mem = talloc_new(ctx->diff);
 313         TDB_DATA recvalue;
 314         struct db_record *rec = dbwrap_fetch_locked(ctx->diff, mem, key);
 315
 316         if (rec == NULL) {
 317                 return -1;
 318         }
 319
 320         recvalue = dbwrap_record_get_value(rec);
 321
 322         if (recvalue.dptr == 0) { /* first entry */
 323                 status = dbwrap_fetch(ctx->db, ctx->diff, key, &diff.oval);
 324                 if (!NT_STATUS_IS_OK(status)) {
 325                         diff.oval = tdb_null;
 326                 }
 327         } else {
 328                 diff = unpack_diff(recvalue);
 329                 talloc_free(diff.nval.dptr);
 330         }
 331         diff.nval = talloc_copy(ctx->diff, value);
 332
 333         DEBUG_DIFF(2, mem, "TDB DIFF", key, diff.oval, diff.nval);
 334
 335         status = dbwrap_record_store(rec, pack_diff(&diff), 0);
 336
 337         talloc_free(mem);
 338
 339         if (!NT_STATUS_IS_OK(status)) {
 340                 DEBUG(0, ("could not store record %s\n", nt_errstr(status)));
 341                 return -1;
 342         }
 343         ctx->n_diff ++;
 344         return 0;
 345 }
 346
 347 static int del_record(struct check_ctx* ctx, TDB_DATA key) {
 348         return add_record(ctx, key, tdb_null);
 349 }
 350
 351 static TDB_DATA
 352 fetch_record(struct check_ctx* ctx, TALLOC_CTX* mem_ctx, TDB_DATA key)
 353 {
 354         TDB_DATA tmp;
 355         NTSTATUS status;
 356
 357         status = dbwrap_fetch(ctx->diff, mem_ctx, key, &tmp);
 358         if (!NT_STATUS_IS_OK(status)) {
 359                 DEBUG(0, ("Out of memory!\n"));
 360                 return tdb_null;
 361         }
 362         if (tmp.dptr != NULL) {
 363                 TDB_DATA_diff diff = unpack_diff(tmp);
 364                 TDB_DATA ret = talloc_copy(mem_ctx, diff.nval);
 365                 talloc_free(tmp.dptr);
 366                 return ret;
 367         }
 368
 369         status = dbwrap_fetch(ctx->db, mem_ctx, key, &tmp);
 370         if (!NT_STATUS_IS_OK(status)) {
 371                 DEBUG(0, ("Out of memory!\n"));
 372                 return tdb_null;
 373         }
 374
 375         return tmp;
 376 }
 377
 378 static void edit_record(struct record* r) {
 379         TALLOC_CTX* mem = talloc_new(r);
 380         cbuf* ost = cbuf_new(mem);
 381         const char* str;
 382         struct record* nr;
 383         TDB_DATA key;
 384         TDB_DATA val;
 385         cbuf_printf(ost, "%s %s\n",
 386                     print_data(mem, r->key), print_data(mem, r->val));
 387         str = interact_edit(mem, cbuf_gets(ost, 0));
 388         key = parse_data(mem, &str);
 389         val = parse_data(mem, &str);
 390         nr = parse_record(talloc_parent(r), key, val);
 391         if (nr != NULL) {
 392                 *r = *nr;
 393         }
 394         talloc_free(mem);
 395 }
 396
 397 static bool check_version(struct check_ctx* ctx) {
 398         static const char* key = "IDMAP_VERSION";
 399         uint32_t version;
 400         NTSTATUS status;
 401         char action = 's';
 402         struct check_actions* act = &ctx->action;
 403
 404         status = dbwrap_fetch_uint32(ctx->db, key, &version);
 405         if (!NT_STATUS_IS_OK(status)) {
 406                 d_printf("No version number, assume 2\n");
 407                 action = get_action(&act->no_version, NULL, NULL);
 408         } else if (version != 2) {
 409                 d_printf("Wrong version number %d, should be 2\n", version);
 410                 action = get_action(&act->wrong_version, NULL, NULL);
 411         }
 412         switch (action) {
 413         case 's':
 414                 break;
 415         case 'f':
 416                 SIVAL(&version, 0, 2);
 417                 add_record(ctx, string_term_tdb_data(key),
 418                            make_tdb_data((uint8_t *)&version, sizeof(uint32_t)));
 419                 break;
 420         case 'a':
 421                 return false;
 422         default:
 423                 assert(false);
 424         }
 425         return true;
 426 }
 427
 428 static void check_hwm(struct check_ctx* ctx, const char* key, uint32_t target) {
 429         uint32_t hwm;
 430         char action = 's';
 431         NTSTATUS status;
 432         struct check_actions* act = &ctx->action;
 433
 434         status = dbwrap_fetch_uint32(ctx->db, key, &hwm);
 435         if (!NT_STATUS_IS_OK(status)) {
 436                 d_printf("No %s should be %d\n", key, target);
 437                 action = get_action(&act->invalid_hwm, NULL, NULL);
 438         } else if (target < hwm) {
 439                 d_printf("Invalid %s %d: should be %d\n", key, hwm, target);
 440                 action = get_action(&act->invalid_hwm, NULL, NULL);
 441         }
 442         if (action == 'f') {
 443                 SIVAL(&hwm, 0, target);
 444                 add_record(ctx, string_term_tdb_data(key),
 445                            make_tdb_data((uint8_t *)&hwm, sizeof(uint32_t)));
 446         }
 447 }
 448
 449 int traverse_check(struct db_record *rec, void* data) {
 450         struct check_ctx* ctx = (struct check_ctx*)data;
 451         struct check_actions* act = &ctx->action;
 452         TALLOC_CTX* mem = talloc_new(ctx->diff);
 453         TDB_DATA key;
 454         TDB_DATA value;
 455         struct record *r;
 456         char action = 's';
 457
 458         key = dbwrap_record_get_key(rec);
 459         value = dbwrap_record_get_value(rec);
 460
 461         r = parse_record(mem, key, value);
 462
 463         if (is_invalid(r)) {
 464                 action = get_action(&act->invalid_record, r, NULL);
 465                 ctx->n_invalid_record++;
 466         } else if (is_map(r)) {
 467                 TDB_DATA back = fetch_record(ctx, mem, r->val);
 468                 if (back.dptr == NULL) {
 469                         action = get_action(&act->missing_reverse, r, NULL);
 470                         ctx->n_missing_reverse++;
 471                 } else if (!tdb_data_equal(r->key, back)) {
 472                         action = get_action(&act->invalid_mapping, r, &back);
 473                         ctx->n_invalid_mappping++;
 474                 } else {
 475                         if (r->key_type == DT_SID) {
 476                                 action = get_action(&act->valid_mapping, r, NULL);
 477                                 ctx->n_map++;
 478                         } else {
 479                                 action = get_action(&act->valid_mapping, NULL,
 480                                                     NULL);
 481                         }
 482                 }
 483                 adjust_hwm(ctx, r);
 484         } else {
 485                 action = get_action(&act->valid_other, r, NULL);
 486                 ctx->n_other++;
 487         }
 488
 489         while (action) {
 490                 switch (action) {
 491                 case 's': /* skip */
 492                         break;
 493                 case 'd': /* delete */
 494                         del_record(ctx, key);
 495                         break;
 496                 case 'f': /* add reverse mapping */
 497                         add_record(ctx, value, key);
 498                         break;
 499                 case 'e': /* edit */
 500                         edit_record(r);
 501                         action = 'o';
 502                         if (is_invalid(r)) {
 503                                 action = get_action(&act->invalid_edit, r,NULL);
 504                                 continue;
 505                         }
 506                         if (!tdb_data_equal(key, r->key)) {
 507                                 TDB_DATA oval = fetch_record(ctx, mem, r->key);
 508                                 if (!is_empty(oval) &&
 509                                     !tdb_data_equal(oval, r->val))
 510                                 {
 511                                         action = get_action(&act->record_exists,
 512                                                             r, &oval);
 513                                         if (action != 'o') {
 514                                                 continue;
 515                                         }
 516                                 }
 517                         }
 518                         if (is_map(r)) {
 519                                 TDB_DATA okey = fetch_record(ctx, mem, r->val);
 520                                 if (!is_empty(okey) &&
 521                                     !tdb_data_equal(okey, r->key))
 522                                 {
 523                                         action = get_action(&act->record_exists,
 524                                                             reverse_record(r),
 525                                                             &okey);
 526                                 }
 527                         }
 528                         continue;
 529                 case 'o': /* overwrite */
 530                         adjust_hwm(ctx, r);
 531                         if (!tdb_data_equal(key, r->key)) {
 532                                 del_record(ctx, key);
 533                         }
 534                         add_record(ctx, r->key, r->val);
 535                         if (is_map(r)) {
 536                                 add_record(ctx, r->val, r->key);
 537                         }
 538                 }
 539                 action = '\0';
 540         };
 541
 542         talloc_free(mem);
 543
 544         return 0;
 545 }
 546
 547 /******************************************************************************/
 548
 549 void adjust_hwm(struct check_ctx* ctx, const struct record* r) {
 550         enum DT type = (r->key_type == DT_SID) ? r->val_type : r->key_type;
 551         if (type == DT_UID) {
 552                 ctx->uid_hwm = MAX(ctx->uid_hwm, r->id);
 553         } else if (type == DT_GID) {
 554                 ctx->gid_hwm = MAX(ctx->gid_hwm, r->id);
 555         }
 556 }
 557
 558 TDB_DATA talloc_copy(TALLOC_CTX* mem_ctx, TDB_DATA data) {
 559         TDB_DATA ret = {
 560                 .dptr  = (uint8_t *)talloc_size(mem_ctx, data.dsize+1),
 561                 .dsize = data.dsize
 562         };
 563         if (ret.dptr == NULL) {
 564                 ret.dsize = 0;
 565         } else {
 566                 memcpy(ret.dptr, data.dptr, data.dsize);
 567                 ret.dptr[ret.dsize] = '\0';
 568         }
 569         return ret;
 570 }
 571
 572 static bool is_cstr(TDB_DATA str) {
 573         return !is_empty(str) && str.dptr[str.dsize-1] == '\0';
 574 }
 575
 576 static bool parse_sid (TDB_DATA str, enum DT* type, struct dom_sid* sid) {
 577         struct dom_sid tmp;
 578         const char* s = (const char*)str.dptr;
 579         if ((s[0] == 'S') && string_to_sid(&tmp, s)) {
 580                 *sid = tmp;
 581                 *type = DT_SID;
 582                 return true;
 583         }
 584         return false;
 585 }
 586
 587 static bool parse_xid(TDB_DATA str, enum DT* type, unsigned long* id) {
 588         char c, t;
 589         unsigned long tmp;
 590         if (sscanf((const char*)str.dptr, "%cID %lu%c", &c, &tmp, &t) == 2) {
 591                 if (c == 'U') {
 592                         *id = tmp;
 593                         *type = DT_UID;
 594                         return true;
 595                 } else if (c == 'G') {
 596                         *id = tmp;
 597                         *type = DT_GID;
 598                         return true;
 599                 }
 600         }
 601         return false;
 602 }
 603
 604
 605 struct record*
 606 parse_record(TALLOC_CTX* mem_ctx, TDB_DATA key, TDB_DATA val)
 607 {
 608         struct record* ret = talloc_zero(mem_ctx, struct record);
 609         if (ret == NULL) {
 610                 DEBUG(0, ("Out of memory.\n"));
 611                 return NULL;
 612         }
 613         ret->key = talloc_copy(ret, key);
 614         ret->val = talloc_copy(ret, val);
 615         if ((ret->key.dptr == NULL && key.dptr != NULL) ||
 616             (ret->val.dptr == NULL && val.dptr != NULL))
 617         {
 618                 talloc_free(ret);
 619                 DEBUG(0, ("Out of memory.\n"));
 620                 return NULL;
 621         }
 622         assert((ret->key_type == DT_INV) && (ret->val_type == DT_INV));
 623
 624         if (!is_cstr(key)) {
 625                 return ret;
 626         }
 627         if (parse_sid(key, &ret->key_type, &ret->sid)) {
 628                 parse_xid(val, &ret->val_type, &ret->id);
 629         } else if (parse_xid(key, &ret->key_type, &ret->id)) {
 630                 if (is_cstr(val)) {
 631                         parse_sid(val, &ret->val_type, &ret->sid);
 632                 }
 633         } else if (strcmp((const char*)key.dptr, "USER HWM") == 0) {
 634                 ret->key_type = DT_HWM;
 635                 if (val.dsize == 4) {
 636                         ret->id = IVAL(val.dptr,0);
 637                         ret->val_type = DT_UID;
 638                 }
 639         } else if (strcmp((const char*)key.dptr, "GROUP HWM") == 0) {
 640                 ret->key_type = DT_HWM;
 641                 if (val.dsize == 4) {
 642                         ret->id = IVAL(val.dptr,0);
 643                         ret->val_type = DT_GID;
 644                 }
 645         } else if (strcmp((const char*)key.dptr, "IDMAP_VERSION") == 0) {
 646                 ret->key_type = DT_VER;
 647                 if (val.dsize == 4) {
 648                         ret->id = IVAL(val.dptr,0);
 649                         ret->val_type = DT_VER;
 650                 }
 651         } else if (strcmp((const char*)key.dptr, "__db_sequence_number__") == 0) {
 652                 ret->key_type = DT_SEQ;
 653                 if (val.dsize == 8) {
 654                         ret->id = *(uint64_t*)val.dptr;
 655                         ret->val_type = DT_SEQ;
 656                 }
 657         }
 658
 659         return ret;
 660 }
 661
 662 struct record* reverse_record(struct record* in)
 663 {
 664         return parse_record(talloc_parent(in), in->val, in->key);
 665 }
 666
 667
 668 /******************************************************************************/
 669
 670
 671 char* print_data(TALLOC_CTX* mem_ctx, TDB_DATA d)
 672 {
 673         if (!is_empty(d)) {
 674                 char* ret = NULL;
 675                 cbuf* ost = cbuf_new(mem_ctx);
 676                 int len = cbuf_print_quoted(ost, (const char*)d.dptr, d.dsize);
 677                 if (len != -1) {
 678                         cbuf_swapptr(ost, &ret, 0);
 679                         talloc_steal(mem_ctx, ret);
 680                 }
 681                 talloc_free(ost);
 682                 return ret;
 683         }
 684         return talloc_strdup(mem_ctx, "<NULL>");
 685 }
 686
 687
 688 TDB_DATA parse_data(TALLOC_CTX* mem_ctx, const char** ptr) {
 689         cbuf* ost = cbuf_new(mem_ctx);
 690         TDB_DATA ret = tdb_null;
 691         srprs_skipws(ptr);
 692         if (srprs_quoted(ptr, ost)) {
 693                 ret.dsize = cbuf_getpos(ost);
 694                 ret.dptr = (uint8_t *)talloc_steal(mem_ctx, cbuf_gets(ost,0));
 695         }
 696         talloc_free(ost);
 697         return ret;
 698 }
 699
 700 static int traverse_print_diff(struct db_record *rec, void* data) {
 701         struct check_ctx* ctx = (struct check_ctx*)data;
 702         TDB_DATA key;
 703         TDB_DATA value;
 704         TDB_DATA_diff diff;
 705         TALLOC_CTX* mem = talloc_new(ctx->diff);
 706
 707         key = dbwrap_record_get_key(rec);
 708         value = dbwrap_record_get_value(rec);
 709         diff = unpack_diff(value);
 710
 711         DEBUG_DIFF(0, mem, "DIFF", key, diff.oval, diff.nval);
 712
 713         talloc_free(mem);
 714         return 0;
 715 }
 716
 717
 718 static int traverse_commit(struct db_record *diff_rec, void* data) {
 719         struct check_ctx* ctx = (struct check_ctx*)data;
 720         TDB_DATA key;
 721         TDB_DATA diff_value;
 722         TDB_DATA_diff diff;
 723         TDB_DATA value;
 724         TALLOC_CTX* mem = talloc_new(ctx->diff);
 725         int ret = -1;
 726         NTSTATUS status;
 727         struct check_actions* act = &ctx->action;
 728         struct db_record* rec;
 729
 730         key = dbwrap_record_get_key(diff_rec);
 731         diff_value = dbwrap_record_get_value(diff_rec);
 732         diff = unpack_diff(diff_value);
 733
 734         rec = dbwrap_fetch_locked(ctx->db, mem, key);
 735         if (rec == NULL) {
 736                 goto done;
 737         }
 738
 739         value = dbwrap_record_get_value(rec);
 740
 741         if (!tdb_data_equal(value, diff.oval)) {
 742                 char action;
 743
 744                 d_printf("Warning: record has changed: %s\n"
 745                          "expected: %s got %s\n", print_data(mem, key),
 746                          print_data(mem, diff.oval),
 747                          print_data(mem, value));
 748
 749                 action = get_action(&act->invalid_diff, NULL, NULL);
 750                 if (action == 's') {
 751                         ret = 0;
 752                         goto done;
 753                 } else if (action == 'a') {
 754                         goto done;
 755                 }
 756         }
 757
 758         DEBUG_DIFF(0, mem, "Commit", key, diff.oval, diff.nval);
 759
 760         if (is_empty(diff.nval)) {
 761                 status = dbwrap_record_delete(rec);
 762         } else {
 763                 status = dbwrap_record_store(rec, diff.nval, 0);
 764         }
 765
 766         if (!NT_STATUS_IS_OK(status)) {
 767                 DEBUG(0, ("could not store record %s\n", nt_errstr(status)));
 768                 if (!ctx->opts.force) {
 769                         goto done;
 770                 }
 771         }
 772         ret = 0;
 773 done:
 774         talloc_free(mem);
 775         return  ret;
 776 }
 777
 778 static struct check_ctx*
 779 check_init(TALLOC_CTX* mem_ctx, const struct check_options* o)
 780 {
 781         struct check_ctx* ctx = talloc_zero(mem_ctx, struct check_ctx);
 782         if (ctx == NULL) {
 783                 DEBUG(0, (_("No memory\n")));
 784                 return NULL;
 785         }
 786
 787         ctx->diff = db_open_rbt(ctx);
 788         if (ctx->diff == NULL) {
 789                 talloc_free(ctx);
 790                 DEBUG(0, (_("No memory\n")));
 791                 return NULL;
 792         }
 793
 794         ctx->action = check_actions_init(o);
 795         ctx->opts = *o;
 796         return ctx;
 797 }
 798
 799 static bool check_open_db(struct check_ctx* ctx, const char* name, int oflags)
 800 {
 801         if (name == NULL) {
 802                 d_fprintf(stderr, _("Error: name == NULL in check_open_db().\n"));
 803                 return false;
 804         }
 805
 806         if (ctx->db != NULL) {
 807                 if ((ctx->oflags == oflags) && (strcmp(ctx->name, name))) {
 808                         return true;
 809                 } else {
 810                         TALLOC_FREE(ctx->db);
 811                 }
 812         }
 813
 814         ctx->db = db_open(ctx, name, 0, TDB_DEFAULT, oflags, 0);
 815         if (ctx->db == NULL) {
 816                 d_fprintf(stderr,
 817                           _("Could not open idmap db (%s) for writing: %s\n"),
 818                           name, strerror(errno));
 819                 return false;
 820         }
 821
 822         if (ctx->name != name) {
 823                 TALLOC_FREE(ctx->name);
 824                 ctx->name = talloc_strdup(ctx, name);
 825         }
 826
 827         ctx->oflags = oflags;
 828         return true;
 829 }
 830
 831 static bool check_do_checks(struct check_ctx* ctx)
 832 {
 833         NTSTATUS status;
 834
 835         if (!check_version(ctx)) {
 836                 return false;
 837         }
 838
 839         status = dbwrap_traverse(ctx->db, traverse_check, ctx, NULL);
 840
 841         if (!NT_STATUS_IS_OK(status)) {
 842                 DEBUG(0, ("failed to traverse %s\n", ctx->name));
 843                 return false;
 844         }
 845
 846         check_hwm(ctx, "USER HWM", ctx->uid_hwm + 1);
 847         check_hwm(ctx, "GROUP HWM", ctx->gid_hwm + 1);
 848
 849         return true;
 850 }
 851
 852 static void check_summary(const struct check_ctx* ctx)
 853 {
 854         d_printf("uid hwm: %d\ngid hwm: %d\n", ctx->uid_hwm, ctx->gid_hwm);
 855         d_printf("mappings: %d\nother: %d\n", ctx->n_map, ctx->n_other);
 856         d_printf("invalid records: %d\nmissing links: %d\ninvalid links: %d\n",
 857                  ctx->n_invalid_record, ctx->n_missing_reverse,
 858                  ctx->n_invalid_mappping);
 859         d_printf("%u changes:\n", ctx->n_diff);
 860 }
 861
 862 static bool check_transaction_start(struct check_ctx* ctx) {
 863         return (dbwrap_transaction_start(ctx->db) == 0);
 864 }
 865
 866 static bool check_transaction_commit(struct check_ctx* ctx) {
 867         return (dbwrap_transaction_commit(ctx->db) == 0);
 868 }
 869
 870 static bool check_transaction_cancel(struct check_ctx* ctx) {
 871         return (dbwrap_transaction_cancel(ctx->db) == 0);
 872 }
 873
 874
 875 static void check_diff_list(struct check_ctx* ctx) {
 876         NTSTATUS status = dbwrap_traverse(ctx->diff, traverse_print_diff, ctx, NULL);
 877
 878         if (!NT_STATUS_IS_OK(status)) {
 879                 DEBUG(0, ("failed to traverse diff\n"));
 880         }
 881
 882 }
 883
 884 static bool check_commit(struct check_ctx* ctx)
 885 {
 886         struct check_actions* act = &ctx->action;
 887         char action;
 888         NTSTATUS status = NT_STATUS_OK;
 889
 890         check_summary(ctx);
 891
 892         if (ctx->n_diff == 0) {
 893                 return true;
 894         }
 895
 896         while ((action = get_action(&act->commit, NULL, NULL)) == 'l') {
 897                 check_diff_list(ctx);
 898         }
 899         if (action == 's') {
 900                 return true;
 901         }
 902         assert(action == 'c');
 903
 904         if (!check_open_db(ctx, ctx->name, O_RDWR)) {
 905                 return false;
 906         }
 907
 908         if (!check_transaction_start(ctx)) {
 909                 return false;
 910         }
 911
 912         status = dbwrap_traverse(ctx->diff, traverse_commit, ctx, NULL);
 913
 914         if (!NT_STATUS_IS_OK(status)) {
 915                 check_transaction_cancel(ctx);
 916                 return false;
 917         }
 918         if (ctx->opts.test) { /*get_action? */
 919                 return check_transaction_cancel(ctx);
 920         } else {
 921                 return check_transaction_commit(ctx);
 922         }
 923 }
 924
 925 int net_idmap_check_db(const char* db, const struct check_options* o)
 926 {
 927         int ret = -1;
 928         TALLOC_CTX* mem_ctx = talloc_stackframe();
 929         struct check_ctx* ctx = check_init(mem_ctx, o);
 930
 931         if (!o->automatic && !isatty(STDIN_FILENO)) {
 932                 DEBUG(0, ("Interactive use needs tty, use --auto\n"));
 933                 goto done;
 934         }
 935         if (o->lock) {
 936                 if (check_open_db(ctx, db, O_RDWR)
 937                     && check_transaction_start(ctx))
 938                 {
 939                         if ( check_do_checks(ctx)
 940                              && check_commit(ctx)
 941                              && check_transaction_commit(ctx))
 942                         {
 943                                 ret = 0;
 944                         } else {
 945                                 check_transaction_cancel(ctx);
 946                         }
 947                 }
 948         } else {
 949                 if (check_open_db(ctx, db, O_RDONLY)
 950                     && check_do_checks(ctx)
 951                     && check_commit(ctx))
 952                 {
 953                         ret = 0;
 954                 }
 955         }
 956 done:
 957         talloc_free(mem_ctx);
 958         return ret;
 959 }
 960
 961
 962 /*Local Variables:*/
 963 /*mode: c*/
 964 /*End:*/