e2fsck/journal.c

   1 /*
   2  * journal.c --- code for handling the "ext3" journal
   3  *
   4  * Copyright (C) 2000 Andreas Dilger
   5  * Copyright (C) 2000 Theodore Ts'o
   6  *
   7  * Parts of the code are based on fs/jfs/journal.c by Stephen C. Tweedie
   8  * Copyright (C) 1999 Red Hat Software
   9  *
  10  * This file may be redistributed under the terms of the
  11  * GNU General Public License version 2 or at your discretion
  12  * any later version.
  13  */
  14
  15 #ifdef HAVE_SYS_MOUNT_H
  16 #include <sys/mount.h>
  17 #define MNT_FL (MS_MGC_VAL | MS_RDONLY)
  18 #endif
  19 #ifdef HAVE_SYS_STAT_H
  20 #include <sys/stat.h>
  21 #endif
  22
  23 #include "jfs.h"
  24 #include "problem.h"
  25 #include "uuid/uuid.h"
  26
  27 #ifdef JFS_DEBUG
  28 static int bh_count = 0;
  29 int journal_enable_debug = 2;
  30 #endif
  31
  32 int bmap(struct inode *inode, int block)
  33 {
  34         int retval;
  35         blk_t phys;
  36
  37         retval = ext2fs_bmap(inode->i_ctx->fs, inode->i_ino, &inode->i_ext2,
  38                              NULL, 0, block, &phys);
  39
  40         if (retval)
  41                 com_err(inode->i_ctx->device_name, retval,
  42                         _("bmap journal inode %ld, block %d\n"),
  43                         inode->i_ino, block);
  44
  45         return phys;
  46 }
  47
  48 struct buffer_head *getblk(e2fsck_t ctx, blk_t blocknr, int blocksize)
  49 {
  50         struct buffer_head *bh;
  51
  52         bh = e2fsck_allocate_memory(ctx, sizeof(*bh), "block buffer");
  53         if (!bh)
  54                 return NULL;
  55
  56         jfs_debug(4, "getblk for block %lu (%d bytes)(total %d)\n",
  57                   blocknr, blocksize, ++bh_count);
  58
  59         bh->b_ctx = ctx;
  60         bh->b_size = blocksize;
  61         bh->b_blocknr = blocknr;
  62
  63         return bh;
  64 }
  65
  66 void ll_rw_block(int rw, int dummy, struct buffer_head *bh)
  67 {
  68         int retval;
  69
  70         if (rw == READ && !bh->b_uptodate) {
  71                 jfs_debug(3, "reading block %lu/%p\n", bh->b_blocknr, bh);
  72                 retval = io_channel_read_blk(bh->b_ctx->fs->io, bh->b_blocknr,
  73                                              1, bh->b_data);
  74                 if (retval) {
  75                         com_err(bh->b_ctx->device_name, retval,
  76                                 "while reading block %ld\n", bh->b_blocknr);
  77                         bh->b_err = retval;
  78                         return;
  79                 }
  80                 bh->b_uptodate = 1;
  81         } else if (rw == WRITE && bh->b_dirty) {
  82                 jfs_debug(3, "writing block %lu/%p\n", bh->b_blocknr, bh);
  83                 retval = io_channel_write_blk(bh->b_ctx->fs->io, bh->b_blocknr,
  84                                               1, bh->b_data);
  85                 if (retval) {
  86                         com_err(bh->b_ctx->device_name, retval,
  87                                 "while writing block %ld\n", bh->b_blocknr);
  88                         bh->b_err = retval;
  89                         return;
  90                 }
  91                 bh->b_dirty = 0;
  92                 bh->b_uptodate = 1;
  93         } else
  94                 jfs_debug(3, "no-op %s for block %lu\n",
  95                           rw == READ ? "read" : "write", bh->b_blocknr);
  96 }
  97
  98 void mark_buffer_dirty(struct buffer_head *bh, int dummy)
  99 {
 100         bh->b_dirty = dummy | 1; /* use dummy to avoid unused variable */
 101 }
 102
 103 void brelse(struct buffer_head *bh)
 104 {
 105         if (bh->b_dirty)
 106                 ll_rw_block(WRITE, 1, bh);
 107         jfs_debug(3, "freeing block %lu/%p (total %d)\n",
 108                   bh->b_blocknr, bh, --bh_count);
 109         ext2fs_free_mem((void **) &bh);
 110 }
 111
 112 int buffer_uptodate(struct buffer_head *bh)
 113 {
 114         return bh->b_uptodate;
 115 }
 116
 117 void wait_on_buffer(struct buffer_head *bh)
 118 {
 119         if (!bh->b_uptodate)
 120                 ll_rw_block(READ, 1, bh);
 121 }
 122
 123
 124 static void e2fsck_clear_recover(e2fsck_t ctx, int error)
 125 {
 126         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 127
 128         s->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
 129
 130         /* if we had an error doing journal recovery, we need a full fsck */
 131         if (error)
 132                 s->s_state &= ~EXT2_VALID_FS;
 133         ext2fs_mark_super_dirty(ctx->fs);
 134 }
 135
 136 static int e2fsck_journal_init_inode(e2fsck_t ctx, struct ext2fs_sb *s,
 137                                      ino_t journal_inum, journal_t **journal)
 138 {
 139         struct inode *inode;
 140         const char *cmdname = ctx->program_name;
 141         struct buffer_head *bh;
 142         blk_t start;
 143         int retval;
 144
 145         jfs_debug(1, "Using journal inode %lu\n", journal_inum);
 146         *journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal");
 147         if (!*journal) {
 148                 return EXT2_ET_NO_MEMORY;
 149         }
 150
 151         inode = e2fsck_allocate_memory(ctx, sizeof(*inode), "journal inode");
 152         if (!inode) {
 153                 retval = EXT2_ET_NO_MEMORY;
 154                 goto exit_journal;
 155         }
 156
 157         inode->i_ctx = ctx;
 158         inode->i_ino = journal_inum;
 159         retval = ext2fs_read_inode(ctx->fs, journal_inum, &inode->i_ext2);
 160         if (retval)
 161                 goto exit_inode;
 162
 163         (*journal)->j_dev = ctx;
 164         (*journal)->j_inode = inode;
 165         (*journal)->j_blocksize = ctx->fs->blocksize;
 166         (*journal)->j_maxlen = inode->i_ext2.i_size / (*journal)->j_blocksize;
 167
 168         if (!inode->i_ext2.i_links_count ||
 169             !LINUX_S_ISREG(inode->i_ext2.i_mode) ||
 170             (*journal)->j_maxlen < JFS_MIN_JOURNAL_BLOCKS ||
 171             (start = bmap(inode, 0)) == 0) {
 172                 retval = EXT2_ET_BAD_INODE_NUM;
 173                 goto exit_inode;
 174         }
 175
 176         bh = getblk(ctx, start, (*journal)->j_blocksize);
 177         if (!bh) {
 178                 retval = EXT2_ET_NO_MEMORY;
 179                 goto exit_inode;
 180         }
 181         (*journal)->j_sb_buffer = bh;
 182         (*journal)->j_superblock = (journal_superblock_t *)bh->b_data;
 183
 184         return 0;
 185
 186 exit_inode:
 187         ext2fs_free_mem((void **)&inode);
 188 exit_journal:
 189         ext2fs_free_mem((void **)journal);
 190
 191         return retval;
 192 }
 193
 194 static int e2fsck_get_journal(e2fsck_t ctx, journal_t **journal)
 195 {
 196         char uuid_str[40];
 197         struct problem_context pctx;
 198         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 199         int recover = s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
 200
 201         clear_problem_context(&pctx);
 202
 203         if (s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 204                 if (s->s_journal_dev) {
 205                         pctx.num = s->s_journal_dev;
 206                         /* this problem aborts on -y, -p, unsupported on -n */
 207                         if (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_DEV, &pctx))
 208                                 return EXT2_ET_UNSUPP_FEATURE;
 209                         s->s_journal_dev = 0;
 210                         s->s_state &= ~EXT2_VALID_FS;
 211                         ext2fs_mark_super_dirty(ctx->fs);
 212                 }
 213                 if (!uuid_is_null(s->s_journal_uuid)) {
 214                         uuid_unparse(s->s_journal_uuid, uuid_str);
 215                         pctx.str = uuid_str;
 216                         /* this problem aborts on -y, -p, unsupported on -n */
 217                         if (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_UUID, &pctx))
 218                                 return EXT2_ET_UNSUPP_FEATURE;
 219                         uuid_clear(s->s_journal_uuid);
 220                         s->s_state &= ~EXT2_VALID_FS;
 221                         ext2fs_mark_super_dirty(ctx->fs);
 222                 }
 223                 if (!s->s_journal_inum)
 224                         return EXT2_ET_BAD_INODE_NUM;
 225         }
 226
 227         if (s->s_journal_dev) {
 228                 pctx.num = s->s_journal_dev;
 229                 if (!fix_problem(ctx, PR_0_JOURNAL_BAD_DEV, &pctx))
 230                         return EXT2_ET_UNSUPP_FEATURE;
 231                 s->s_journal_dev = 0;
 232                 s->s_state &= ~EXT2_VALID_FS;
 233                 ext2fs_mark_super_dirty(ctx->fs);
 234         }
 235         if (!uuid_is_null(s->s_journal_uuid)) {
 236                 uuid_unparse(s->s_journal_uuid, uuid_str);
 237                 pctx.str = uuid_str;
 238                 if (!fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx))
 239                         return EXT2_ET_UNSUPP_FEATURE;
 240                 uuid_clear(s->s_journal_uuid);
 241                 s->s_state &= ~EXT2_VALID_FS;
 242                 ext2fs_mark_super_dirty(ctx->fs);
 243         }
 244
 245         return e2fsck_journal_init_inode(ctx, s, s->s_journal_inum, journal);
 246 }
 247
 248 static int e2fsck_journal_fix_bad_inode(e2fsck_t ctx,
 249                                         struct problem_context *pctx)
 250 {
 251         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 252         int recover = s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
 253         int has_journal = s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 254
 255         if (has_journal || s->s_journal_inum) {
 256                 /* The journal inode is bogus, remove and force full fsck */
 257                 if (fix_problem(ctx, PR_0_JOURNAL_BAD_INODE, pctx)) {
 258                         struct ext2fs_sb *s =(struct ext2fs_sb *)ctx->fs->super;
 259
 260                         if (has_journal && s->s_journal_inum)
 261                                 printf("*** ext3 journal has been deleted - "
 262                                        "filesystem is now ext2 only ***\n\n");
 263                         s->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 264                         s->s_journal_inum = 0;
 265                         e2fsck_clear_recover(ctx, 1);
 266                         return 0;
 267                 }
 268                 return EXT2_ET_BAD_INODE_NUM;
 269         } else if (recover) {
 270                 if (fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, pctx)) {
 271                         e2fsck_clear_recover(ctx, 1);
 272                         return 0;
 273                 }
 274                 return EXT2_ET_UNSUPP_FEATURE;
 275         }
 276         return 0;
 277 }
 278
 279 static int e2fsck_journal_fix_unsupported_super(e2fsck_t ctx,
 280                                                 struct problem_context *pctx)
 281 {
 282         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 283
 284         /* Unsupported journal superblock - first choice is abort.
 285          * Declining that gives the option to reset the superblock.
 286          *
 287          * Otherwise we get the chance to delete the journal, and
 288          * failing that we abort because we can't handle this.
 289          */
 290         if (s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
 291             fix_problem(ctx, PR_0_JOURNAL_UNSUPP_SUPER, pctx))
 292                 return EXT2_ET_CORRUPT_SUPERBLOCK;
 293
 294         if (e2fsck_journal_fix_bad_inode(ctx, pctx))
 295                 return EXT2_ET_UNSUPP_FEATURE;
 296
 297         return 0;
 298 }
 299
 300 static int e2fsck_journal_load(journal_t *journal)
 301 {
 302         e2fsck_t ctx = journal->j_dev;
 303         journal_superblock_t *jsb;
 304         struct buffer_head *jbh = journal->j_sb_buffer;
 305         struct problem_context pctx;
 306
 307         clear_problem_context(&pctx);
 308
 309         ll_rw_block(READ, 1, jbh);
 310         if (jbh->b_err) {
 311                 com_err(ctx->device_name, jbh->b_err,
 312                         _("reading journal superblock\n"));
 313                 return jbh->b_err;
 314         }
 315
 316         jsb = journal->j_superblock;
 317         /* If we don't even have JFS_MAGIC, we probably have a wrong inode */
 318         if (jsb->s_header.h_magic != htonl(JFS_MAGIC_NUMBER))
 319                 return e2fsck_journal_fix_bad_inode(ctx, &pctx);
 320
 321         if (jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1) ||
 322             jsb->s_blocksize != htonl(journal->j_blocksize)) {
 323                 com_err(ctx->device_name, EXT2_ET_CORRUPT_SUPERBLOCK,
 324                         _("%s: no valid journal superblock found\n"));
 325                 return EXT2_ET_CORRUPT_SUPERBLOCK;
 326         }
 327
 328         if (jsb->s_header.h_blocktype != htonl(JFS_SUPERBLOCK_V1)) {
 329                 pctx.num = ntohl(jsb->s_header.h_blocktype);
 330                 return e2fsck_journal_fix_unsupported_super(ctx, &pctx);
 331         }
 332
 333         if (ntohl(jsb->s_maxlen) < journal->j_maxlen)
 334                 journal->j_maxlen = ntohl(jsb->s_maxlen);
 335         else if (ntohl(jsb->s_maxlen) > journal->j_maxlen) {
 336                 com_err(ctx->device_name, EXT2_ET_CORRUPT_SUPERBLOCK,
 337                         _("%s: journal too short\n"));
 338                 return EXT2_ET_CORRUPT_SUPERBLOCK;
 339         }
 340
 341         journal->j_tail_sequence = ntohl(jsb->s_sequence);
 342         journal->j_transaction_sequence = journal->j_tail_sequence;
 343         journal->j_tail = ntohl(jsb->s_start);
 344         journal->j_first = ntohl(jsb->s_first);
 345         journal->j_last = ntohl(jsb->s_maxlen);
 346
 347         return 0;
 348 }
 349
 350 void e2fsck_journal_reset_super(e2fsck_t ctx, journal_superblock_t *jsb,
 351                                      blk_t size)
 352 {
 353         jsb->s_header.h_magic = htonl(JFS_MAGIC_NUMBER);
 354         jsb->s_header.h_blocktype = htonl(JFS_SUPERBLOCK_V1);
 355         jsb->s_blocksize = htonl(ctx->fs->blocksize);
 356         jsb->s_maxlen = htonl(size);
 357         jsb->s_first = 1;
 358         jsb->s_sequence = htonl(1);
 359 }
 360
 361 static int e2fsck_journal_fix_corrupt_super(e2fsck_t ctx, journal_t *journal,
 362                                             struct problem_context *pctx)
 363 {
 364         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 365         int recover = s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
 366
 367         pctx->num = journal->j_inode->i_ino;
 368
 369         if (s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
 370                 if (fix_problem(ctx, PR_0_JOURNAL_BAD_SUPER, pctx)) {
 371                         journal_superblock_t *jsb = journal->j_superblock;
 372
 373                         e2fsck_journal_reset_super(ctx, jsb, journal->j_maxlen);
 374
 375                         journal->j_transaction_sequence = 1;
 376                         e2fsck_clear_recover(ctx, recover);
 377                         return 0;
 378                 }
 379                 return EXT2_ET_CORRUPT_SUPERBLOCK;
 380         } else if (e2fsck_journal_fix_bad_inode(ctx, pctx))
 381                 return EXT2_ET_CORRUPT_SUPERBLOCK;
 382
 383         return 0;
 384 }
 385
 386 static void e2fsck_journal_release(e2fsck_t ctx, journal_t *journal, int reset)
 387 {
 388         journal_superblock_t *jsb;
 389
 390         if (!(ctx->options & E2F_OPT_READONLY)) {
 391                 jsb = journal->j_superblock;
 392                 jsb->s_sequence = htonl(journal->j_transaction_sequence);
 393                 if (reset)
 394                         jsb->s_start = 0; /* this marks the journal as empty */
 395                 mark_buffer_dirty(journal->j_sb_buffer, 1);
 396         }
 397         brelse(journal->j_sb_buffer);
 398
 399         if (journal->j_inode)
 400                 free(journal->j_inode);
 401         ext2fs_free_mem((void **)&journal);
 402 }
 403
 404 int e2fsck_check_ext3_journal(e2fsck_t ctx)
 405 {
 406         struct ext2fs_sb *s = (struct ext2fs_sb *)ctx->fs->super;
 407         journal_t *journal;
 408         int recover = s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
 409         struct problem_context pctx;
 410         int reset = 0;
 411         int retval;
 412
 413         /* If we don't have any journal features, don't do anything more */
 414         if (!(s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
 415             !recover && s->s_journal_inum == 0 && s->s_journal_dev == 0 &&
 416             uuid_is_null(s->s_journal_uuid))
 417                 return 0;
 418
 419         clear_problem_context(&pctx);
 420         pctx.num = s->s_journal_inum;
 421
 422         retval = e2fsck_get_journal(ctx, &journal);
 423         if (retval) {
 424                 if (retval == EXT2_ET_BAD_INODE_NUM)
 425                         return e2fsck_journal_fix_bad_inode(ctx, &pctx);
 426                 return retval;
 427         }
 428
 429         retval = e2fsck_journal_load(journal);
 430         if (retval) {
 431                 if (retval == EXT2_ET_CORRUPT_SUPERBLOCK)
 432                         return e2fsck_journal_fix_corrupt_super(ctx, journal,
 433                                                                 &pctx);
 434                 return retval;
 435         }
 436
 437         /*
 438          * We want to make the flags consistent here.  We will not leave with
 439          * needs_recovery set but has_journal clear.  We can't get in a loop
 440          * with -y, -n, or -p, only if a user isn't making up their mind.
 441          */
 442 no_has_journal:
 443         if (!(s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
 444                 recover = s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
 445                 pctx.str = "inode";
 446                 if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) {
 447                         if (recover &&
 448                             !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx))
 449                                 goto no_has_journal;
 450                         s->s_journal_inum = 0;
 451                         e2fsck_clear_recover(ctx, recover);
 452                 } else if (!(ctx->options & E2F_OPT_READONLY)) {
 453                         s->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
 454                         ext2fs_mark_super_dirty(ctx->fs);
 455                 }
 456         }
 457
 458         if (s->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
 459             !(s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) &&
 460             journal->j_superblock->s_start != 0) {
 461                 if (fix_problem(ctx, PR_0_JOURNAL_RESET_JOURNAL, &pctx))
 462                         reset = 1;
 463                 /* I refuse to enable recovery for journal */
 464         }
 465
 466         e2fsck_journal_release(ctx, journal, reset);
 467         return retval;
 468 }
 469
 470 static int recover_ext3_journal(e2fsck_t ctx)
 471 {
 472         ext2_filsys fs = ctx->fs;
 473         journal_t *journal;
 474         int retval;
 475
 476         retval = e2fsck_get_journal(ctx, &journal);
 477         if (retval)
 478                 return retval;
 479
 480         retval = e2fsck_journal_load(journal);
 481         if (retval)
 482                 return retval;
 483
 484         retval = -journal_recover(journal);
 485         e2fsck_journal_release(ctx, journal, 1);
 486         return retval;
 487 }
 488
 489
 490 #if 0
 491 #define TEMPLATE "/tmp/ext3.XXXXXX"
 492
 493 /*
 494  * This function attempts to mount and unmount an ext3 filesystem,
 495  * which is a cheap way to force the kernel to run the journal and
 496  * handle the recovery for us.
 497  */
 498 static int recover_ext3_journal_via_mount(e2fsck_t ctx)
 499 {
 500         ext2_filsys fs = ctx->fs;
 501         char    *dirlist[] = {"/mnt","/lost+found","/tmp","/root","/boot",0};
 502         errcode_t        retval, retval2;
 503         int      count = 0;
 504         char     template[] = TEMPLATE;
 505         struct stat buf;
 506         char    *tmpdir;
 507
 508         if (ctx->options & E2F_OPT_READONLY) {
 509                 printf("%s: won't do journal recovery while read-only\n",
 510                        ctx->device_name);
 511                 return EXT2_ET_FILE_RO;
 512         }
 513
 514         printf(_("%s: trying for ext3 kernel journal recovery\n"),
 515                ctx->device_name);
 516         /*
 517          * First try to make a temporary directory.  This may fail if
 518          * the root partition is still mounted read-only.
 519          */
 520 newtemp:
 521         tmpdir = mktemp(template);
 522         if (tmpdir) {
 523                 jfs_debug(2, "trying %s as ext3 temp mount point\n", tmpdir);
 524                 if (mkdir(template, 0700)) {
 525                         if (errno == EROFS) {
 526                                 tmpdir = NULL;
 527                                 template[0] = '\0';
 528                         } else if (errno == EEXIST && count++ < 10) {
 529                                 strcpy(template, TEMPLATE);
 530                                 goto newtemp;
 531                         }
 532                         return errno;
 533                 }
 534         }
 535
 536         /*
 537          * OK, creating a temporary directory didn't work.
 538          * Let's try a list of possible temporary mountpoints.
 539          */
 540         if (!tmpdir) {
 541                 dev_t   rootdev;
 542                 char    **cpp, *dir;
 543
 544                 if (stat("/", &buf))
 545                         return errno;
 546
 547                 rootdev = buf.st_dev;
 548
 549                 /*
 550                  * Check that dir is on the same device as root (no other
 551                  * filesystem is mounted there), and it's a directory.
 552                  */
 553                 for (cpp = dirlist; (dir = *cpp); cpp++)
 554                         if (stat(dir, &buf) == 0 && buf.st_dev == rootdev &&
 555                             S_ISDIR(buf.st_mode)) {
 556                                 tmpdir = dir;
 557                                 break;
 558                         }
 559         }
 560
 561         if (tmpdir) {
 562                 io_manager      io_ptr = fs->io->manager;
 563                 int             blocksize = fs->blocksize;
 564
 565                 jfs_debug(2, "using %s for ext3 mount\n", tmpdir);
 566                 /* FIXME - need to handle loop devices here */
 567                 if (mount(ctx->device_name, tmpdir, "ext3", MNT_FL, NULL)) {
 568                         retval = errno;
 569                         com_err(ctx->program_name, errno,
 570                                 "when mounting %s", ctx->device_name);
 571                         if (template[0])
 572                                 rmdir(tmpdir);
 573                         return retval;
 574                 }
 575                 /*
 576                  * Now that it mounted cleanly, the filesystem will have been
 577                  * recovered, so we can now unmount it.
 578                  */
 579                 if (umount(tmpdir))
 580                         return errno;
 581
 582                 /*
 583                  * Remove the temporary directory, if it was created.
 584                  */
 585                 if (template[0])
 586                         rmdir(tmpdir);
 587                 return 0;
 588         }
 589 }
 590 #endif
 591
 592 int e2fsck_run_ext3_journal(e2fsck_t ctx)
 593 {
 594         io_manager io_ptr = ctx->fs->io->manager;
 595         int blocksize = ctx->fs->blocksize;
 596         errcode_t       retval, recover_retval;
 597
 598         printf(_("%s: recovering journal\n"), ctx->device_name);
 599         if (ctx->options & E2F_OPT_READONLY) {
 600                 printf(_("%s: won't do journal recovery while read-only\n"),
 601                        ctx->device_name);
 602                 return EXT2_ET_FILE_RO;
 603         }
 604
 605         recover_retval = recover_ext3_journal(ctx);
 606
 607         /*
 608          * Reload the filesystem context to get up-to-date data from disk
 609          * because journal recovery will change the filesystem under us.
 610          */
 611         ext2fs_close(ctx->fs);
 612         retval = ext2fs_open(ctx->filesystem_name, EXT2_FLAG_RW,
 613                              ctx->superblock, blocksize, io_ptr,
 614                              &ctx->fs);
 615
 616         if (retval) {
 617                 com_err(ctx->program_name, retval,
 618                         _("while trying to re-open %s"),
 619                         ctx->device_name);
 620                 fatal_error(ctx, 0);
 621         }
 622         ctx->fs->priv_data = ctx;
 623
 624         /* Set the superblock flags */
 625         e2fsck_clear_recover(ctx, recover_retval);
 626         return recover_retval;
 627 }