e2fsck/pass1b.c

   1 /*
   2  * pass1b.c --- Pass #1b of e2fsck
   3  *
   4  * This file contains pass1B, pass1C, and pass1D of e2fsck.  They are
   5  * only invoked if pass 1 discovered blocks which are in use by more
   6  * than one inode.
   7  *
   8  * Pass1B scans the data blocks of all the inodes again, generating a
   9  * complete list of duplicate blocks and which inodes have claimed
  10  * them.
  11  *
  12  * Pass1C does a tree-traversal of the filesystem, to determine the
  13  * parent directories of these inodes.  This step is necessary so that
  14  * e2fsck can print out the pathnames of affected inodes.
  15  *
  16  * Pass1D is a reconciliation pass.  For each inode with duplicate
  17  * blocks, the user is prompted if s/he would like to clone the file
  18  * (so that the file gets a fresh copy of the duplicated blocks) or
  19  * simply to delete the file.
  20  *
  21  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
  22  *
  23  * %Begin-Header%
  24  * This file may be redistributed under the terms of the GNU Public
  25  * License.
  26  * %End-Header%
  27  *
  28  */
  29
  30 #include <time.h>
  31 #ifdef HAVE_ERRNO_H
  32 #include <errno.h>
  33 #endif
  34
  35 #ifdef HAVE_INTTYPES_H
  36 #include <inttypes.h>
  37 #endif
  38
  39 #ifndef HAVE_INTPTR_T
  40 typedef long intptr_t;
  41 #endif
  42
  43 /* Needed for architectures where sizeof(int) != sizeof(void *) */
  44 #define INT_TO_VOIDPTR(val)  ((void *)(intptr_t)(val))
  45 #define VOIDPTR_TO_INT(ptr)  ((int)(intptr_t)(ptr))
  46
  47 #include <et/com_err.h>
  48 #include "e2fsck.h"
  49
  50 #include "problem.h"
  51 #include "dict.h"
  52
  53 /* Define an extension to the ext2 library's block count information */
  54 #define BLOCK_COUNT_EXTATTR     (-5)
  55
  56 struct cluster_el {
  57         blk64_t cluster;
  58         struct cluster_el *next;
  59 };
  60
  61 struct inode_el {
  62         ext2_ino_t      inode;
  63         struct inode_el *next;
  64 };
  65
  66 struct dup_cluster {
  67         int             num_bad;
  68         struct inode_el *inode_list;
  69 };
  70
  71 /*
  72  * This structure stores information about a particular inode which
  73  * is sharing blocks with other inodes.  This information is collected
  74  * to display to the user, so that the user knows what files he or she
  75  * is dealing with, when trying to decide how to resolve the conflict
  76  * of multiply-claimed blocks.
  77  */
  78 struct dup_inode {
  79         ext2_ino_t              dir;
  80         int                     num_dupblocks;
  81         struct ext2_inode       inode;
  82         struct cluster_el       *cluster_list;
  83 };
  84
  85 static int process_pass1b_block(ext2_filsys fs, blk64_t *blocknr,
  86                                 e2_blkcnt_t blockcnt, blk64_t ref_blk,
  87                                 int ref_offset, void *priv_data);
  88 static void delete_file(e2fsck_t ctx, ext2_ino_t ino,
  89                         struct dup_inode *dp, char *block_buf);
  90 static errcode_t clone_file(e2fsck_t ctx, ext2_ino_t ino,
  91                             struct dup_inode *dp, char* block_buf);
  92 static int check_if_fs_block(e2fsck_t ctx, blk64_t test_block);
  93 static int check_if_fs_cluster(e2fsck_t ctx, blk64_t cluster);
  94
  95 static void pass1b(e2fsck_t ctx, char *block_buf);
  96 static void pass1c(e2fsck_t ctx, char *block_buf);
  97 static void pass1d(e2fsck_t ctx, char *block_buf);
  98
  99 static int dup_inode_count = 0;
 100 static int dup_inode_founddir = 0;
 101
 102 static dict_t clstr_dict, ino_dict;
 103
 104 static ext2fs_inode_bitmap inode_dup_map;
 105
 106 static int dict_int_cmp(const void *a, const void *b)
 107 {
 108         intptr_t        ia, ib;
 109
 110         ia = (intptr_t)a;
 111         ib = (intptr_t)b;
 112
 113         return (ia-ib);
 114 }
 115
 116 /*
 117  * Add a duplicate block record
 118  */
 119 static void add_dupe(e2fsck_t ctx, ext2_ino_t ino, blk64_t cluster,
 120                      struct ext2_inode *inode)
 121 {
 122         dnode_t *n;
 123         struct dup_cluster      *db;
 124         struct dup_inode        *di;
 125         struct cluster_el       *cluster_el;
 126         struct inode_el         *ino_el;
 127
 128         n = dict_lookup(&clstr_dict, INT_TO_VOIDPTR(cluster));
 129         if (n)
 130                 db = (struct dup_cluster *) dnode_get(n);
 131         else {
 132                 db = (struct dup_cluster *) e2fsck_allocate_memory(ctx,
 133                         sizeof(struct dup_cluster), "duplicate cluster header");
 134                 db->num_bad = 0;
 135                 db->inode_list = 0;
 136                 dict_alloc_insert(&clstr_dict, INT_TO_VOIDPTR(cluster), db);
 137         }
 138         ino_el = (struct inode_el *) e2fsck_allocate_memory(ctx,
 139                          sizeof(struct inode_el), "inode element");
 140         ino_el->inode = ino;
 141         ino_el->next = db->inode_list;
 142         db->inode_list = ino_el;
 143         db->num_bad++;
 144
 145         n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(ino));
 146         if (n)
 147                 di = (struct dup_inode *) dnode_get(n);
 148         else {
 149                 di = (struct dup_inode *) e2fsck_allocate_memory(ctx,
 150                          sizeof(struct dup_inode), "duplicate inode header");
 151                 if (ino == EXT2_ROOT_INO) {
 152                         di->dir = EXT2_ROOT_INO;
 153                         dup_inode_founddir++;
 154                 } else
 155                         di->dir = 0;
 156
 157                 di->num_dupblocks = 0;
 158                 di->cluster_list = 0;
 159                 di->inode = *inode;
 160                 dict_alloc_insert(&ino_dict, INT_TO_VOIDPTR(ino), di);
 161         }
 162         cluster_el = (struct cluster_el *) e2fsck_allocate_memory(ctx,
 163                          sizeof(struct cluster_el), "cluster element");
 164         cluster_el->cluster = cluster;
 165         cluster_el->next = di->cluster_list;
 166         di->cluster_list = cluster_el;
 167         di->num_dupblocks++;
 168 }
 169
 170 /*
 171  * Free a duplicate inode record
 172  */
 173 static void inode_dnode_free(dnode_t *node,
 174                              void *context EXT2FS_ATTR((unused)))
 175 {
 176         struct dup_inode        *di;
 177         struct cluster_el               *p, *next;
 178
 179         di = (struct dup_inode *) dnode_get(node);
 180         for (p = di->cluster_list; p; p = next) {
 181                 next = p->next;
 182                 free(p);
 183         }
 184         free(di);
 185         free(node);
 186 }
 187
 188 /*
 189  * Free a duplicate cluster record
 190  */
 191 static void cluster_dnode_free(dnode_t *node,
 192                                void *context EXT2FS_ATTR((unused)))
 193 {
 194         struct dup_cluster      *dc;
 195         struct inode_el         *p, *next;
 196
 197         dc = (struct dup_cluster *) dnode_get(node);
 198         for (p = dc->inode_list; p; p = next) {
 199                 next = p->next;
 200                 free(p);
 201         }
 202         free(dc);
 203         free(node);
 204 }
 205
 206
 207 /*
 208  * Main procedure for handling duplicate blocks
 209  */
 210 void e2fsck_pass1_dupblocks(e2fsck_t ctx, char *block_buf)
 211 {
 212         ext2_filsys             fs = ctx->fs;
 213         struct problem_context  pctx;
 214 #ifdef RESOURCE_TRACK
 215         struct resource_track   rtrack;
 216 #endif
 217
 218         clear_problem_context(&pctx);
 219
 220         pctx.errcode = e2fsck_allocate_inode_bitmap(fs,
 221                         _("multiply claimed inode map"),
 222                         EXT2FS_BMAP64_RBTREE, "inode_dup_map",
 223                         &inode_dup_map);
 224         if (pctx.errcode) {
 225                 fix_problem(ctx, PR_1B_ALLOCATE_IBITMAP_ERROR, &pctx);
 226                 ctx->flags |= E2F_FLAG_ABORT;
 227                 return;
 228         }
 229
 230         dict_init(&ino_dict, DICTCOUNT_T_MAX, dict_int_cmp);
 231         dict_init(&clstr_dict, DICTCOUNT_T_MAX, dict_int_cmp);
 232         dict_set_allocator(&ino_dict, NULL, inode_dnode_free, NULL);
 233         dict_set_allocator(&clstr_dict, NULL, cluster_dnode_free, NULL);
 234
 235         init_resource_track(&rtrack, ctx->fs->io);
 236         pass1b(ctx, block_buf);
 237         print_resource_track(ctx, "Pass 1b", &rtrack, ctx->fs->io);
 238
 239         init_resource_track(&rtrack, ctx->fs->io);
 240         pass1c(ctx, block_buf);
 241         print_resource_track(ctx, "Pass 1c", &rtrack, ctx->fs->io);
 242
 243         init_resource_track(&rtrack, ctx->fs->io);
 244         pass1d(ctx, block_buf);
 245         print_resource_track(ctx, "Pass 1d", &rtrack, ctx->fs->io);
 246
 247         /*
 248          * Time to free all of the accumulated data structures that we
 249          * don't need anymore.
 250          */
 251         dict_free_nodes(&ino_dict);
 252         dict_free_nodes(&clstr_dict);
 253         ext2fs_free_inode_bitmap(inode_dup_map);
 254 }
 255
 256 /*
 257  * Scan the inodes looking for inodes that contain duplicate blocks.
 258  */
 259 struct process_block_struct {
 260         e2fsck_t        ctx;
 261         ext2_ino_t      ino;
 262         int             dup_blocks;
 263         blk64_t         cur_cluster;
 264         struct ext2_inode *inode;
 265         struct problem_context *pctx;
 266 };
 267
 268 static void pass1b(e2fsck_t ctx, char *block_buf)
 269 {
 270         ext2_filsys fs = ctx->fs;
 271         ext2_ino_t ino = 0;
 272         struct ext2_inode inode;
 273         ext2_inode_scan scan;
 274         struct process_block_struct pb;
 275         struct problem_context pctx;
 276
 277         clear_problem_context(&pctx);
 278
 279         if (!(ctx->options & E2F_OPT_PREEN))
 280                 fix_problem(ctx, PR_1B_PASS_HEADER, &pctx);
 281         pctx.errcode = ext2fs_open_inode_scan(fs, ctx->inode_buffer_blocks,
 282                                               &scan);
 283         if (pctx.errcode) {
 284                 fix_problem(ctx, PR_1B_ISCAN_ERROR, &pctx);
 285                 ctx->flags |= E2F_FLAG_ABORT;
 286                 return;
 287         }
 288         ctx->stashed_inode = &inode;
 289         pb.ctx = ctx;
 290         pb.pctx = &pctx;
 291         pctx.str = "pass1b";
 292         while (1) {
 293                 if (ino % (fs->super->s_inodes_per_group * 4) == 1) {
 294                         if (e2fsck_mmp_update(fs))
 295                                 fatal_error(ctx, 0);
 296                 }
 297                 pctx.errcode = ext2fs_get_next_inode(scan, &ino, &inode);
 298                 if (pctx.errcode == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
 299                         continue;
 300                 if (pctx.errcode) {
 301                         fix_problem(ctx, PR_1B_ISCAN_ERROR, &pctx);
 302                         ctx->flags |= E2F_FLAG_ABORT;
 303                         return;
 304                 }
 305                 if (!ino)
 306                         break;
 307                 pctx.ino = ctx->stashed_ino = ino;
 308                 if ((ino != EXT2_BAD_INO) &&
 309                     !ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino))
 310                         continue;
 311
 312                 pb.ino = ino;
 313                 pb.dup_blocks = 0;
 314                 pb.inode = &inode;
 315                 pb.cur_cluster = ~0;
 316
 317                 if (ext2fs_inode_has_valid_blocks2(fs, &inode) ||
 318                     (ino == EXT2_BAD_INO))
 319                         pctx.errcode = ext2fs_block_iterate3(fs, ino,
 320                                              BLOCK_FLAG_READ_ONLY, block_buf,
 321                                              process_pass1b_block, &pb);
 322                 /* If the feature is not set, attrs will be cleared later anyway */
 323                 if ((fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR) &&
 324                     ext2fs_file_acl_block(fs, &inode)) {
 325                         blk64_t blk = ext2fs_file_acl_block(fs, &inode);
 326                         process_pass1b_block(fs, &blk,
 327                                              BLOCK_COUNT_EXTATTR, 0, 0, &pb);
 328                         ext2fs_file_acl_block_set(fs, &inode, blk);
 329                 }
 330                 if (pb.dup_blocks) {
 331                         end_problem_latch(ctx, PR_LATCH_DBLOCK);
 332                         if (ino >= EXT2_FIRST_INODE(fs->super) ||
 333                             ino == EXT2_ROOT_INO)
 334                                 dup_inode_count++;
 335                 }
 336                 if (pctx.errcode)
 337                         fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx);
 338         }
 339         ext2fs_close_inode_scan(scan);
 340         e2fsck_use_inode_shortcuts(ctx, 0);
 341 }
 342
 343 static int process_pass1b_block(ext2_filsys fs EXT2FS_ATTR((unused)),
 344                                 blk64_t *block_nr,
 345                                 e2_blkcnt_t blockcnt,
 346                                 blk64_t ref_blk EXT2FS_ATTR((unused)),
 347                                 int ref_offset EXT2FS_ATTR((unused)),
 348                                 void *priv_data)
 349 {
 350         struct process_block_struct *p;
 351         e2fsck_t ctx;
 352         blk64_t lc;
 353
 354         if (HOLE_BLKADDR(*block_nr))
 355                 return 0;
 356         p = (struct process_block_struct *) priv_data;
 357         ctx = p->ctx;
 358         lc = EXT2FS_B2C(fs, blockcnt);
 359
 360         if (!ext2fs_test_block_bitmap2(ctx->block_dup_map, *block_nr))
 361                 goto finish;
 362
 363         /* OK, this is a duplicate block */
 364         if (p->ino != EXT2_BAD_INO) {
 365                 p->pctx->blk = *block_nr;
 366                 fix_problem(ctx, PR_1B_DUP_BLOCK, p->pctx);
 367         }
 368         p->dup_blocks++;
 369         ext2fs_mark_inode_bitmap2(inode_dup_map, p->ino);
 370
 371         if (lc != p->cur_cluster)
 372                 add_dupe(ctx, p->ino, EXT2FS_B2C(fs, *block_nr), p->inode);
 373
 374 finish:
 375         p->cur_cluster = lc;
 376         return 0;
 377 }
 378
 379 /*
 380  * Pass 1c: Scan directories for inodes with duplicate blocks.  This
 381  * is used so that we can print pathnames when prompting the user for
 382  * what to do.
 383  */
 384 struct search_dir_struct {
 385         int             count;
 386         ext2_ino_t      first_inode;
 387         ext2_ino_t      max_inode;
 388 };
 389
 390 static int search_dirent_proc(ext2_ino_t dir, int entry,
 391                               struct ext2_dir_entry *dirent,
 392                               int offset EXT2FS_ATTR((unused)),
 393                               int blocksize EXT2FS_ATTR((unused)),
 394                               char *buf EXT2FS_ATTR((unused)),
 395                               void *priv_data)
 396 {
 397         struct search_dir_struct *sd;
 398         struct dup_inode        *p;
 399         dnode_t                 *n;
 400
 401         sd = (struct search_dir_struct *) priv_data;
 402
 403         if (dirent->inode > sd->max_inode)
 404                 /* Should abort this inode, but not everything */
 405                 return 0;
 406
 407         if ((dirent->inode < sd->first_inode) || (entry < DIRENT_OTHER_FILE) ||
 408             !ext2fs_test_inode_bitmap2(inode_dup_map, dirent->inode))
 409                 return 0;
 410
 411         n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(dirent->inode));
 412         if (!n)
 413                 return 0;
 414         p = (struct dup_inode *) dnode_get(n);
 415         if (!p->dir) {
 416                 p->dir = dir;
 417                 sd->count--;
 418         }
 419
 420         return(sd->count ? 0 : DIRENT_ABORT);
 421 }
 422
 423
 424 static void pass1c(e2fsck_t ctx, char *block_buf)
 425 {
 426         ext2_filsys fs = ctx->fs;
 427         struct search_dir_struct sd;
 428         struct problem_context pctx;
 429
 430         clear_problem_context(&pctx);
 431
 432         if (!(ctx->options & E2F_OPT_PREEN))
 433                 fix_problem(ctx, PR_1C_PASS_HEADER, &pctx);
 434
 435         /*
 436          * Search through all directories to translate inodes to names
 437          * (by searching for the containing directory for that inode.)
 438          */
 439         sd.count = dup_inode_count - dup_inode_founddir;
 440         sd.first_inode = EXT2_FIRST_INODE(fs->super);
 441         sd.max_inode = fs->super->s_inodes_count;
 442         ext2fs_dblist_dir_iterate(fs->dblist, 0, block_buf,
 443                                   search_dirent_proc, &sd);
 444 }
 445
 446 static void pass1d(e2fsck_t ctx, char *block_buf)
 447 {
 448         ext2_filsys fs = ctx->fs;
 449         struct dup_inode        *p, *t;
 450         struct dup_cluster      *q;
 451         ext2_ino_t              *shared, ino;
 452         int     shared_len;
 453         int     i;
 454         int     file_ok;
 455         int     meta_data = 0;
 456         struct problem_context pctx;
 457         dnode_t *n, *m;
 458         struct cluster_el       *s;
 459         struct inode_el *r;
 460
 461         clear_problem_context(&pctx);
 462
 463         if (!(ctx->options & E2F_OPT_PREEN))
 464                 fix_problem(ctx, PR_1D_PASS_HEADER, &pctx);
 465         e2fsck_read_bitmaps(ctx);
 466
 467         pctx.num = dup_inode_count; /* dict_count(&ino_dict); */
 468         fix_problem(ctx, PR_1D_NUM_DUP_INODES, &pctx);
 469         shared = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
 470                                 sizeof(ext2_ino_t) * dict_count(&ino_dict),
 471                                 "Shared inode list");
 472         for (n = dict_first(&ino_dict); n; n = dict_next(&ino_dict, n)) {
 473                 p = (struct dup_inode *) dnode_get(n);
 474                 shared_len = 0;
 475                 file_ok = 1;
 476                 ino = (ext2_ino_t)VOIDPTR_TO_INT(dnode_getkey(n));
 477                 if (ino == EXT2_BAD_INO || ino == EXT2_RESIZE_INO)
 478                         continue;
 479
 480                 /*
 481                  * Find all of the inodes which share blocks with this
 482                  * one.  First we find all of the duplicate blocks
 483                  * belonging to this inode, and then search each block
 484                  * get the list of inodes, and merge them together.
 485                  */
 486                 for (s = p->cluster_list; s; s = s->next) {
 487                         m = dict_lookup(&clstr_dict,
 488                                         INT_TO_VOIDPTR(s->cluster));
 489                         if (!m)
 490                                 continue; /* Should never happen... */
 491                         q = (struct dup_cluster *) dnode_get(m);
 492                         if (q->num_bad > 1)
 493                                 file_ok = 0;
 494                         if (check_if_fs_cluster(ctx, s->cluster)) {
 495                                 file_ok = 0;
 496                                 meta_data = 1;
 497                         }
 498
 499                         /*
 500                          * Add all inodes used by this block to the
 501                          * shared[] --- which is a unique list, so
 502                          * if an inode is already in shared[], don't
 503                          * add it again.
 504                          */
 505                         for (r = q->inode_list; r; r = r->next) {
 506                                 if (r->inode == ino)
 507                                         continue;
 508                                 for (i = 0; i < shared_len; i++)
 509                                         if (shared[i] == r->inode)
 510                                                 break;
 511                                 if (i == shared_len) {
 512                                         shared[shared_len++] = r->inode;
 513                                 }
 514                         }
 515                 }
 516
 517                 /*
 518                  * Report the inode that we are working on
 519                  */
 520                 pctx.inode = &p->inode;
 521                 pctx.ino = ino;
 522                 pctx.dir = p->dir;
 523                 pctx.blkcount = p->num_dupblocks;
 524                 pctx.num = meta_data ? shared_len+1 : shared_len;
 525                 fix_problem(ctx, PR_1D_DUP_FILE, &pctx);
 526                 pctx.blkcount = 0;
 527                 pctx.num = 0;
 528
 529                 if (meta_data)
 530                         fix_problem(ctx, PR_1D_SHARE_METADATA, &pctx);
 531
 532                 for (i = 0; i < shared_len; i++) {
 533                         m = dict_lookup(&ino_dict, INT_TO_VOIDPTR(shared[i]));
 534                         if (!m)
 535                                 continue; /* should never happen */
 536                         t = (struct dup_inode *) dnode_get(m);
 537                         /*
 538                          * Report the inode that we are sharing with
 539                          */
 540                         pctx.inode = &t->inode;
 541                         pctx.ino = shared[i];
 542                         pctx.dir = t->dir;
 543                         fix_problem(ctx, PR_1D_DUP_FILE_LIST, &pctx);
 544                 }
 545                 if (file_ok) {
 546                         fix_problem(ctx, PR_1D_DUP_BLOCKS_DEALT, &pctx);
 547                         continue;
 548                 }
 549                 if (fix_problem(ctx, PR_1D_CLONE_QUESTION, &pctx)) {
 550                         pctx.errcode = clone_file(ctx, ino, p, block_buf);
 551                         if (pctx.errcode)
 552                                 fix_problem(ctx, PR_1D_CLONE_ERROR, &pctx);
 553                         else
 554                                 continue;
 555                 }
 556                 if (fix_problem(ctx, PR_1D_DELETE_QUESTION, &pctx))
 557                         delete_file(ctx, ino, p, block_buf);
 558                 else
 559                         ext2fs_unmark_valid(fs);
 560         }
 561         ext2fs_free_mem(&shared);
 562 }
 563
 564 /*
 565  * Drop the refcount on the dup_block structure, and clear the entry
 566  * in the block_dup_map if appropriate.
 567  */
 568 static void decrement_badcount(e2fsck_t ctx, blk64_t block,
 569                                struct dup_cluster *p)
 570 {
 571         p->num_bad--;
 572         if (p->num_bad <= 0 ||
 573             (p->num_bad == 1 && !check_if_fs_block(ctx, block))) {
 574                 if (check_if_fs_cluster(ctx, EXT2FS_B2C(ctx->fs, block)))
 575                         return;
 576                 ext2fs_unmark_block_bitmap2(ctx->block_dup_map, block);
 577         }
 578 }
 579
 580 static int delete_file_block(ext2_filsys fs,
 581                              blk64_t    *block_nr,
 582                              e2_blkcnt_t blockcnt,
 583                              blk64_t ref_block EXT2FS_ATTR((unused)),
 584                              int ref_offset EXT2FS_ATTR((unused)),
 585                              void *priv_data)
 586 {
 587         struct process_block_struct *pb;
 588         struct dup_cluster *p;
 589         dnode_t *n;
 590         e2fsck_t ctx;
 591         blk64_t c, lc;
 592
 593         pb = (struct process_block_struct *) priv_data;
 594         ctx = pb->ctx;
 595
 596         if (HOLE_BLKADDR(*block_nr))
 597                 return 0;
 598
 599         c = EXT2FS_B2C(fs, *block_nr);
 600         lc = EXT2FS_B2C(fs, blockcnt);
 601         if (ext2fs_test_block_bitmap2(ctx->block_dup_map, *block_nr)) {
 602                 n = dict_lookup(&clstr_dict, INT_TO_VOIDPTR(c));
 603                 if (n) {
 604                         p = (struct dup_cluster *) dnode_get(n);
 605                         if (lc != pb->cur_cluster)
 606                                 decrement_badcount(ctx, *block_nr, p);
 607                 } else
 608                         com_err("delete_file_block", 0,
 609                             _("internal error: can't find dup_blk for %llu\n"),
 610                                 *block_nr);
 611         } else {
 612                 ext2fs_unmark_block_bitmap2(ctx->block_found_map, *block_nr);
 613                 ext2fs_block_alloc_stats2(fs, *block_nr, -1);
 614                 pb->dup_blocks++;
 615         }
 616         pb->cur_cluster = lc;
 617
 618         return 0;
 619 }
 620
 621 static void delete_file(e2fsck_t ctx, ext2_ino_t ino,
 622                         struct dup_inode *dp, char* block_buf)
 623 {
 624         ext2_filsys fs = ctx->fs;
 625         struct process_block_struct pb;
 626         struct problem_context  pctx;
 627         unsigned int            count;
 628
 629         clear_problem_context(&pctx);
 630         pctx.ino = pb.ino = ino;
 631         pb.dup_blocks = 0;
 632         pb.ctx = ctx;
 633         pctx.str = "delete_file";
 634         pb.cur_cluster = ~0;
 635
 636         if (ext2fs_inode_has_valid_blocks2(fs, &dp->inode))
 637                 pctx.errcode = ext2fs_block_iterate3(fs, ino,
 638                                                      BLOCK_FLAG_READ_ONLY,
 639                                                      block_buf,
 640                                                      delete_file_block, &pb);
 641         if (pctx.errcode)
 642                 fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx);
 643         if (ctx->inode_bad_map)
 644                 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
 645         ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(dp->inode.i_mode));
 646         quota_data_sub(ctx->qctx, &dp->inode, ino,
 647                        pb.dup_blocks * fs->blocksize);
 648         quota_data_inodes(ctx->qctx, &dp->inode, ino, -1);
 649
 650         /* Inode may have changed by block_iterate, so reread it */
 651         e2fsck_read_inode(ctx, ino, &dp->inode, "delete_file");
 652         e2fsck_clear_inode(ctx, ino, &dp->inode, 0, "delete_file");
 653         if (ext2fs_file_acl_block(fs, &dp->inode) &&
 654             (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
 655                 count = 1;
 656                 pctx.errcode = ext2fs_adjust_ea_refcount2(fs,
 657                                         ext2fs_file_acl_block(fs, &dp->inode),
 658                                                    block_buf, -1, &count);
 659                 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
 660                         pctx.errcode = 0;
 661                         count = 1;
 662                 }
 663                 if (pctx.errcode) {
 664                         pctx.blk = ext2fs_file_acl_block(fs, &dp->inode);
 665                         fix_problem(ctx, PR_1B_ADJ_EA_REFCOUNT, &pctx);
 666                 }
 667                 /*
 668                  * If the count is zero, then arrange to have the
 669                  * block deleted.  If the block is in the block_dup_map,
 670                  * also call delete_file_block since it will take care
 671                  * of keeping the accounting straight.
 672                  */
 673                 if ((count == 0) ||
 674                     ext2fs_test_block_bitmap2(ctx->block_dup_map,
 675                                         ext2fs_file_acl_block(fs, &dp->inode))) {
 676                         blk64_t blk = ext2fs_file_acl_block(fs, &dp->inode);
 677                         delete_file_block(fs, &blk,
 678                                           BLOCK_COUNT_EXTATTR, 0, 0, &pb);
 679                         ext2fs_file_acl_block_set(fs, &dp->inode, blk);
 680                         quota_data_sub(ctx->qctx, &dp->inode, ino, fs->blocksize);
 681                 }
 682         }
 683 }
 684
 685 struct clone_struct {
 686         errcode_t       errcode;
 687         blk64_t         dup_cluster;
 688         blk64_t         alloc_block;
 689         ext2_ino_t      dir;
 690         char    *buf;
 691         e2fsck_t ctx;
 692 };
 693
 694 static int clone_file_block(ext2_filsys fs,
 695                             blk64_t     *block_nr,
 696                             e2_blkcnt_t blockcnt,
 697                             blk64_t ref_block EXT2FS_ATTR((unused)),
 698                             int ref_offset EXT2FS_ATTR((unused)),
 699                             void *priv_data)
 700 {
 701         struct dup_cluster *p;
 702         blk64_t new_block;
 703         errcode_t       retval;
 704         struct clone_struct *cs = (struct clone_struct *) priv_data;
 705         dnode_t *n;
 706         e2fsck_t ctx;
 707         blk64_t c;
 708         int is_meta = 0;
 709
 710         ctx = cs->ctx;
 711
 712         if (HOLE_BLKADDR(*block_nr))
 713                 return 0;
 714
 715         c = EXT2FS_B2C(fs, blockcnt);
 716         if (check_if_fs_cluster(ctx, EXT2FS_B2C(fs, *block_nr)))
 717                 is_meta = 1;
 718
 719         if (c == cs->dup_cluster && cs->alloc_block) {
 720                 new_block = cs->alloc_block;
 721                 goto got_block;
 722         }
 723
 724         if (ext2fs_test_block_bitmap2(ctx->block_dup_map, *block_nr)) {
 725                 n = dict_lookup(&clstr_dict,
 726                                 INT_TO_VOIDPTR(EXT2FS_B2C(fs, *block_nr)));
 727                 if (!n) {
 728                         com_err("clone_file_block", 0,
 729                             _("internal error: can't find dup_blk for %llu\n"),
 730                                 *block_nr);
 731                         return 0;
 732                 }
 733
 734                 p = (struct dup_cluster *) dnode_get(n);
 735                 if (!is_meta)
 736                         decrement_badcount(ctx, *block_nr, p);
 737
 738                 cs->dup_cluster = c;
 739
 740                 retval = ext2fs_new_block2(fs, 0, ctx->block_found_map,
 741                                            &new_block);
 742                 if (retval) {
 743                         cs->errcode = retval;
 744                         return BLOCK_ABORT;
 745                 }
 746                 cs->alloc_block = new_block;
 747
 748         got_block:
 749                 new_block &= ~EXT2FS_CLUSTER_MASK(fs);
 750                 new_block += EXT2FS_CLUSTER_MASK(fs) & blockcnt;
 751                 if (cs->dir && (blockcnt >= 0)) {
 752                         retval = ext2fs_set_dir_block2(fs->dblist,
 753                                         cs->dir, new_block, blockcnt);
 754                         if (retval) {
 755                                 cs->errcode = retval;
 756                                 return BLOCK_ABORT;
 757                         }
 758                 }
 759 #if 0
 760                 printf("Cloning block #%lld from %llu to %llu\n",
 761                        blockcnt, *block_nr, new_block);
 762 #endif
 763                 retval = io_channel_read_blk64(fs->io, *block_nr, 1, cs->buf);
 764                 if (retval) {
 765                         cs->errcode = retval;
 766                         return BLOCK_ABORT;
 767                 }
 768                 retval = io_channel_write_blk64(fs->io, new_block, 1, cs->buf);
 769                 if (retval) {
 770                         cs->errcode = retval;
 771                         return BLOCK_ABORT;
 772                 }
 773                 *block_nr = new_block;
 774                 ext2fs_mark_block_bitmap2(ctx->block_found_map, new_block);
 775                 ext2fs_mark_block_bitmap2(fs->block_map, new_block);
 776                 return BLOCK_CHANGED;
 777         }
 778         return 0;
 779 }
 780
 781 static errcode_t clone_file(e2fsck_t ctx, ext2_ino_t ino,
 782                             struct dup_inode *dp, char* block_buf)
 783 {
 784         ext2_filsys fs = ctx->fs;
 785         errcode_t       retval;
 786         struct clone_struct cs;
 787         struct problem_context  pctx;
 788         blk64_t         blk, new_blk;
 789         dnode_t         *n;
 790         struct inode_el *ino_el;
 791         struct dup_cluster      *dc;
 792         struct dup_inode        *di;
 793
 794         clear_problem_context(&pctx);
 795         cs.errcode = 0;
 796         cs.dir = 0;
 797         cs.dup_cluster = ~0;
 798         cs.alloc_block = 0;
 799         cs.ctx = ctx;
 800         retval = ext2fs_get_mem(fs->blocksize, &cs.buf);
 801         if (retval)
 802                 return retval;
 803
 804         if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino))
 805                 cs.dir = ino;
 806
 807         pctx.ino = ino;
 808         pctx.str = "clone_file";
 809         if (ext2fs_inode_has_valid_blocks2(fs, &dp->inode))
 810                 pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
 811                                                      clone_file_block, &cs);
 812         ext2fs_mark_bb_dirty(fs);
 813         if (pctx.errcode) {
 814                 fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx);
 815                 retval = pctx.errcode;
 816                 goto errout;
 817         }
 818         if (cs.errcode) {
 819                 com_err("clone_file", cs.errcode, "%s",
 820                         _("returned from clone_file_block"));
 821                 retval = cs.errcode;
 822                 goto errout;
 823         }
 824         /* The inode may have changed on disk, so we have to re-read it */
 825         e2fsck_read_inode(ctx, ino, &dp->inode, "clone file EA");
 826         blk = ext2fs_file_acl_block(fs, &dp->inode);
 827         new_blk = blk;
 828         if (blk && (clone_file_block(fs, &new_blk,
 829                                      BLOCK_COUNT_EXTATTR, 0, 0, &cs) ==
 830                     BLOCK_CHANGED)) {
 831                 ext2fs_file_acl_block_set(fs, &dp->inode, new_blk);
 832                 e2fsck_write_inode(ctx, ino, &dp->inode, "clone file EA");
 833                 /*
 834                  * If we cloned the EA block, find all other inodes
 835                  * which refered to that EA block, and modify
 836                  * them to point to the new EA block.
 837                  */
 838                 n = dict_lookup(&clstr_dict,
 839                                 INT_TO_VOIDPTR(EXT2FS_B2C(fs, blk)));
 840                 if (!n) {
 841                         com_err("clone_file", 0,
 842                                 _("internal error: couldn't lookup EA "
 843                                   "block record for %llu"), blk);
 844                         retval = 0; /* OK to stumble on... */
 845                         goto errout;
 846                 }
 847                 dc = (struct dup_cluster *) dnode_get(n);
 848                 for (ino_el = dc->inode_list; ino_el; ino_el = ino_el->next) {
 849                         if (ino_el->inode == ino)
 850                                 continue;
 851                         n = dict_lookup(&ino_dict, INT_TO_VOIDPTR(ino_el->inode));
 852                         if (!n) {
 853                                 com_err("clone_file", 0,
 854                                         _("internal error: couldn't lookup EA "
 855                                           "inode record for %u"),
 856                                         ino_el->inode);
 857                                 retval = 0; /* OK to stumble on... */
 858                                 goto errout;
 859                         }
 860                         di = (struct dup_inode *) dnode_get(n);
 861                         if (ext2fs_file_acl_block(fs, &di->inode) == blk) {
 862                                 ext2fs_file_acl_block_set(fs, &di->inode,
 863                                         ext2fs_file_acl_block(fs, &dp->inode));
 864                                 e2fsck_write_inode(ctx, ino_el->inode,
 865                                            &di->inode, "clone file EA");
 866                                 decrement_badcount(ctx, blk, dc);
 867                         }
 868                 }
 869         }
 870         retval = 0;
 871 errout:
 872         ext2fs_free_mem(&cs.buf);
 873         return retval;
 874 }
 875
 876 /*
 877  * This routine returns 1 if a block overlaps with one of the superblocks,
 878  * group descriptors, inode bitmaps, or block bitmaps.
 879  */
 880 static int check_if_fs_block(e2fsck_t ctx, blk64_t test_block)
 881 {
 882         ext2_filsys fs = ctx->fs;
 883         blk64_t first_block;
 884         dgrp_t  i;
 885
 886         first_block = fs->super->s_first_data_block;
 887         for (i = 0; i < fs->group_desc_count; i++) {
 888
 889                 /* Check superblocks/block group descriptors */
 890                 if (ext2fs_bg_has_super(fs, i)) {
 891                         if (test_block >= first_block &&
 892                             (test_block <= first_block + fs->desc_blocks))
 893                                 return 1;
 894                 }
 895
 896                 /* Check the inode table */
 897                 if ((ext2fs_inode_table_loc(fs, i)) &&
 898                     (test_block >= ext2fs_inode_table_loc(fs, i)) &&
 899                     (test_block < (ext2fs_inode_table_loc(fs, i) +
 900                                    fs->inode_blocks_per_group)))
 901                         return 1;
 902
 903                 /* Check the bitmap blocks */
 904                 if ((test_block == ext2fs_block_bitmap_loc(fs, i)) ||
 905                     (test_block == ext2fs_inode_bitmap_loc(fs, i)))
 906                         return 1;
 907
 908                 first_block += fs->super->s_blocks_per_group;
 909         }
 910         return 0;
 911 }
 912
 913 /*
 914  * This routine returns 1 if a cluster overlaps with one of the superblocks,
 915  * group descriptors, inode bitmaps, or block bitmaps.
 916  */
 917 static int check_if_fs_cluster(e2fsck_t ctx, blk64_t cluster)
 918 {
 919         ext2_filsys fs = ctx->fs;
 920         blk64_t first_block;
 921         dgrp_t  i;
 922
 923         first_block = fs->super->s_first_data_block;
 924         for (i = 0; i < fs->group_desc_count; i++) {
 925
 926                 /* Check superblocks/block group descriptors */
 927                 if (ext2fs_bg_has_super(fs, i)) {
 928                         if (cluster >= EXT2FS_B2C(fs, first_block) &&
 929                             (cluster <= EXT2FS_B2C(fs, first_block +
 930                                                    fs->desc_blocks)))
 931                                 return 1;
 932                 }
 933
 934                 /* Check the inode table */
 935                 if ((ext2fs_inode_table_loc(fs, i)) &&
 936                     (cluster >= EXT2FS_B2C(fs,
 937                                            ext2fs_inode_table_loc(fs, i))) &&
 938                     (cluster <= EXT2FS_B2C(fs,
 939                                            ext2fs_inode_table_loc(fs, i) +
 940                                            fs->inode_blocks_per_group - 1)))
 941                         return 1;
 942
 943                 /* Check the bitmap blocks */
 944                 if ((cluster == EXT2FS_B2C(fs,
 945                                            ext2fs_block_bitmap_loc(fs, i))) ||
 946                     (cluster == EXT2FS_B2C(fs,
 947                                            ext2fs_inode_bitmap_loc(fs, i))))
 948                         return 1;
 949
 950                 first_block += fs->super->s_blocks_per_group;
 951         }
 952         return 0;
 953 }