errcode_t ext2fs_open_journal(ext2_filsys fs, journal_t **j)
{
journal_t *journal;
errcode_t retval;
journal_init_revoke_caches();
retval = ext2fs_get_journal(fs, &journal);
if (retval)
return retval;
retval = ext2fs_journal_load(journal);
if (retval)
goto errout;
retval = journal_init_revoke(journal, 1024);
if (retval)
goto errout;
if (journal->j_failed_commit) {
journal->j_superblock->s_errno = -EINVAL;
mark_buffer_dirty(journal->j_sb_buffer);
}
*j = journal;
return 0;
errout:
journal_destroy_revoke(journal);
journal_destroy_revoke_caches();
ext2fs_journal_release(fs, journal, 1, 0);
return retval;
}
/*
* This function makes sure that the superblock fields regarding the
* journal are consistent.
*/
errcode_t ext2fs_check_ext3_journal(ext2_filsys fs)
{
struct ext2_super_block *sb = fs->super;
journal_t *journal;
int recover = fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_RECOVER;
errcode_t retval;
/* If we don't have any journal features, don't do anything more */
if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
!recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 &&
uuid_is_null(sb->s_journal_uuid))
return 0;
retval = ext2fs_get_journal(fs, &journal);
if (retval)
return retval;
retval = ext2fs_journal_load(journal);
if (retval)
goto err;
/*
* We want to make the flags consistent here. We will not leave with
* needs_recovery set but has_journal clear. We can't get in a loop
* with -y, -n, or -p, only if a user isn't making up their mind.
*/
if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
retval = EXT2_ET_JOURNAL_FLAGS_WRONG;
goto err;
}
if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
!(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) &&
journal->j_superblock->s_start != 0) {
retval = EXT2_ET_JOURNAL_FLAGS_WRONG;
goto err;
}
/*
* If we don't need to do replay the journal, check to see if
* the journal's errno is set; if so, we need to mark the file
* system as being corrupt and clear the journal's s_errno.
*/
if (!(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) &&
journal->j_superblock->s_errno) {
fs->super->s_state |= EXT2_ERROR_FS;
ext2fs_mark_super_dirty(fs);
journal->j_superblock->s_errno = 0;
ext2fs_journal_sb_csum_set(journal, journal->j_superblock);
mark_buffer_dirty(journal->j_sb_buffer);
}
err:
ext2fs_journal_release(fs, journal, 0, retval ? 1 : 0);
return retval;
}
errcode_t ext2fs_close_journal(ext2_filsys fs, journal_t **j)
{
journal_t *journal = *j;
journal_destroy_revoke(journal);
journal_destroy_revoke_caches();
ext2fs_journal_release(fs, journal, 0, 0);
*j = NULL;
return 0;
}