Esempio n. 1
0
static int expand_dir_proc(ext2_filsys	fs,
			   blk_t	*blocknr,
			   e2_blkcnt_t	blockcnt,
			   blk_t	ref_block EXT2FS_ATTR((unused)),
			   int		ref_offset EXT2FS_ATTR((unused)),
			   void		*priv_data)
{
	struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data;
	blk_t	new_blk;
	static blk_t	last_blk = 0;
	char		*block;
	errcode_t	retval;

	if (*blocknr) {
		last_blk = *blocknr;
		return 0;
	}
	retval = ext2fs_new_block(fs, last_blk, 0, &new_blk);
	if (retval) {
		es->err = retval;
		return BLOCK_ABORT;
	}
	if (blockcnt > 0) {
		retval = ext2fs_new_dir_block(fs, 0, 0, &block);
		if (retval) {
			es->err = retval;
			return BLOCK_ABORT;
		}
		es->done = 1;
		retval = ext2fs_write_dir_block(fs, new_blk, block);
	} else {
		retval = ext2fs_get_mem(fs->blocksize, &block);
		if (retval) {
			es->err = retval;
			return BLOCK_ABORT;
		}
		memset(block, 0, fs->blocksize);
		retval = io_channel_write_blk(fs->io, new_blk, 1, block);
	}
	if (retval) {
		es->err = retval;
		return BLOCK_ABORT;
	}
	ext2fs_free_mem(&block);
	*blocknr = new_blk;
	ext2fs_block_alloc_stats(fs, new_blk, +1);
	es->newblocks++;

	if (es->done)
		return (BLOCK_CHANGED | BLOCK_ABORT);
	else
		return BLOCK_CHANGED;
}
Esempio n. 2
0
/*
 * Helper function which writes out a directory block.
 */
static int write_dir_block(ext2_filsys fs,
			   blk64_t *block_nr,
			   e2_blkcnt_t blockcnt,
			   blk64_t ref_block EXT2FS_ATTR((unused)),
			   int ref_offset EXT2FS_ATTR((unused)),
			   void *priv_data)
{
	struct write_dir_struct	*wd = (struct write_dir_struct *) priv_data;
	blk64_t	blk;
	char	*dir, *buf = 0;

	if (*block_nr == 0)
		return 0;
	if (blockcnt < 0)
		return 0;
	if (blockcnt < wd->outdir->num)
		dir = wd->outdir->buf + (blockcnt * fs->blocksize);
	else if (wd->ctx->lost_and_found == wd->dir) {
		/* Don't release any extra directory blocks for lost+found */
		wd->err = ext2fs_new_dir_block(fs, 0, 0, &buf);
		if (wd->err)
			return BLOCK_ABORT;
		dir = buf;
		wd->outdir->num++;
	} else {
		/* We don't need this block, so release it */
		e2fsck_read_bitmaps(wd->ctx);
		blk = *block_nr;
		/*
		 * In theory, we only release blocks from the end of the
		 * directory file, so it's fine to clobber a whole cluster at
		 * once.
		 */
		if (blk % EXT2FS_CLUSTER_RATIO(fs) == 0) {
			ext2fs_block_alloc_stats2(fs, blk, -1);
			wd->cleared++;
		}
		*block_nr = 0;
		return BLOCK_CHANGED;
	}

	wd->err = ext2fs_write_dir_block4(fs, *block_nr, dir, 0, wd->dir);
	if (buf)
		ext2fs_free_mem(&buf);

	if (wd->err)
		return BLOCK_ABORT;
	return 0;
}
Esempio n. 3
0
/*
 * Helper function which writes out a directory block.
 */
static int write_dir_block(ext2_filsys fs,
			   blk64_t *block_nr,
			   e2_blkcnt_t blockcnt,
			   blk64_t ref_block EXT2FS_ATTR((unused)),
			   int ref_offset EXT2FS_ATTR((unused)),
			   void *priv_data)
{
	struct write_dir_struct	*wd = (struct write_dir_struct *) priv_data;
	blk64_t	blk;
	char	*dir, *buf = 0;

#ifdef REHASH_DEBUG
	printf("%u: write_dir_block %lld:%lld", wd->ino, blockcnt, *block_nr);
#endif
	if ((*block_nr == 0) || (blockcnt < 0)) {
#ifdef REHASH_DEBUG
		printf(" - skip\n");
#endif
		return 0;
	}
	if (blockcnt < wd->outdir->num)
		dir = wd->outdir->buf + (blockcnt * fs->blocksize);
	else if (wd->ctx->lost_and_found == wd->dir) {
		/* Don't release any extra directory blocks for lost+found */
		wd->err = ext2fs_new_dir_block(fs, 0, 0, &buf);
		if (wd->err)
			return BLOCK_ABORT;
		dir = buf;
		wd->outdir->num++;
	} else {
		/* Don't free blocks at the end of the directory, they
		 * will be truncated by the caller. */
#ifdef REHASH_DEBUG
		printf(" - not freed\n");
#endif
		return 0;
	}
	wd->err = ext2fs_write_dir_block4(fs, *block_nr, dir, 0, wd->dir);
	if (buf)
		ext2fs_free_mem(&buf);

#ifdef REHASH_DEBUG
	printf(" - write (%d)\n", wd->err);
#endif
	if (wd->err)
		return BLOCK_ABORT;
	return 0;
}
Esempio n. 4
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk_t			blk;
	char			*block = 0;
	char 			*ext2bp_block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}


	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block(fs, 0, 0, &blk);
	printf("Using block %lu for the dir\n", blk);
	if (retval)
		goto cleanup;


	printf("Writing the dir info into the buffer\n");
	/*
	 * Create a scratch template for the directory
	 */
	/* Vijay: Offset the block address by the backpointer information */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	//ext2bp_block = block + EXT2BP_HEADER_SIZE;
	//retval = ext2fs_new_dir_block(fs, ino, parent, &ext2bp_block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_size = fs->blocksize;

	/* Vijay: Adding backlink to the inode - Modifying position 0
	 * since this is a new inode - It will not have any other links
	 * pointing to it. First, we need to reset all the backlinks.
	 */
	printf("Vijay: Adding the backlink to %s\n", name);

	int i;
	for(i=0; i < EXT2_N_LINKS; i++)
		inode.i_backlinks[i] = 0;
	inode.i_backlinks[0] = parent;

	printf("Going to write the dir block\n");
	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;


	printf("Link the directory into the filesystem hierarchy\n");
	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		printf("Linking done: %lu\n", retval);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Esempio n. 5
0
/*
 * This routine gets the lost_and_found inode, making it a directory
 * if necessary
 */
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t			ino;
	blk64_t			blk;
	errcode_t		retval;
	struct ext2_inode	inode;
	char *			block;
	static const char	name[] = "lost+found";
	struct 	problem_context	pctx;

	if (ctx->lost_and_found)
		return ctx->lost_and_found;

	clear_problem_context(&pctx);

	retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
			       sizeof(name)-1, 0, &ino);
	if (retval && !fix)
		return 0;
	if (!retval) {
		if (ext2fs_check_directory(fs, ino) == 0) {
			ctx->lost_and_found = ino;
			return ino;
		}

		/* Lost+found isn't a directory! */
		if (!fix)
			return 0;
		pctx.ino = ino;
		if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
			return 0;

		/* OK, unlink the old /lost+found file. */
		pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
		if (pctx.errcode) {
			pctx.str = "ext2fs_unlink";
			fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
			return 0;
		}
		(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
		e2fsck_adjust_inode_count(ctx, ino, -1);
	} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
	}
	if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
		return 0;

	/*
	 * Read the inode and block bitmaps in; we'll be messing with
	 * them.
	 */
	e2fsck_read_bitmaps(ctx);

	/*
	 * First, find a free block
	 */
	retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
		return 0;
	}
	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
	ext2fs_block_alloc_stats2(fs, blk, +1);

	/*
	 * Next find a free inode.
	 */
	retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
				  ctx->inode_used_map, &ino);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
		return 0;
	}
	ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
	ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

	/*
	 * Now let's create the actual data block for the inode
	 */
	retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
		return 0;
	}

	retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
	ext2fs_free_mem(&block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
		return 0;
	}

	/*
	 * Set up the inode structure
	 */
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = 040700;
	inode.i_size = fs->blocksize;
	inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
	inode.i_links_count = 2;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;

	/*
	 * Next, write out the inode.
	 */
	pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_inode";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}
	/*
	 * Finally, create the directory link
	 */
	pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
	if (pctx.errcode) {
		pctx.str = "ext2fs_link";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Miscellaneous bookkeeping that needs to be kept straight.
	 */
	e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
	e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
	ext2fs_icount_store(ctx->inode_count, ino, 2);
	ext2fs_icount_store(ctx->inode_link_info, ino, 2);
	ctx->lost_and_found = ino;
	quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
	quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
	printf("/lost+found created; inode #%lu\n", ino);
#endif
	return ino;
}
Esempio n. 6
0
/*
 * This makes sure the root inode is present; if not, we ask if the
 * user wants us to create it.  Not creating it is a fatal error.
 */
static void check_root(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	blk64_t			blk;
	struct ext2_inode	inode;
	char *			block;
	struct problem_context	pctx;

	clear_problem_context(&pctx);

	if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO)) {
		/*
		 * If the root inode is not a directory, die here.  The
		 * user must have answered 'no' in pass1 when we
		 * offered to clear it.
		 */
		if (!(ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
					       EXT2_ROOT_INO))) {
			fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
		}
		return;
	}

	if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) {
		fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	e2fsck_read_bitmaps(ctx);

	/*
	 * First, find a free block
	 */
	pctx.errcode = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
	if (pctx.errcode) {
		pctx.str = "ext2fs_new_block";
		fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
	ext2fs_mark_block_bitmap2(fs->block_map, blk);
	ext2fs_mark_bb_dirty(fs);

	/*
	 * Now let's create the actual data block for the inode
	 */
	pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO,
					    &block);
	if (pctx.errcode) {
		pctx.str = "ext2fs_new_dir_block";
		fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	pctx.errcode = ext2fs_write_dir_block4(fs, blk, block, 0,
					       EXT2_ROOT_INO);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_dir_block";
		fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
	ext2fs_free_mem(&block);

	/*
	 * Set up the inode structure
	 */
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = 040755;
	inode.i_size = fs->blocksize;
	inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
	inode.i_links_count = 2;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;

	/*
	 * Write out the inode.
	 */
	pctx.errcode = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_inode";
		fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

	/*
	 * Miscellaneous bookkeeping...
	 */
	e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);
	ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2);
	ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2);

	ext2fs_mark_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO);
	ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, EXT2_ROOT_INO);
	ext2fs_mark_inode_bitmap2(fs->inode_map, EXT2_ROOT_INO);
	ext2fs_mark_ib_dirty(fs);
}
Esempio n. 7
0
static int check_dir_block(ext2_filsys fs,
			   struct ext2_db_entry2 *db,
			   void *priv_data)
{
 	struct dx_dir_info	*dx_dir;
#ifdef ENABLE_HTREE
	struct dx_dirblock_info	*dx_db = 0;
#endif /* ENABLE_HTREE */
	struct ext2_dir_entry 	*dirent, *prev;
	ext2_dirhash_t		hash;
	unsigned int		offset = 0;
	int			dir_modified = 0;
	int			dot_state;
	unsigned int		rec_len;
	blk64_t			block_nr = db->blk;
	ext2_ino_t 		ino = db->ino;
	ext2_ino_t 		subdir_parent;
	__u16			links;
	struct check_dir_struct	*cd;
	char 			*buf;
	e2fsck_t		ctx;
	int			problem;
	struct ext2_dx_root_info *root;
	struct ext2_dx_countlimit *limit;
	static dict_t de_dict;
	struct problem_context	pctx;
	int	dups_found = 0;
	int	ret;
	int	dx_csum_size = 0, de_csum_size = 0;
	int	failed_csum = 0;
	int	is_leaf = 1;

	cd = (struct check_dir_struct *) priv_data;
	buf = cd->buf;
	ctx = cd->ctx;

	if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
		return DIRENT_ABORT;

	if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
		return DIRENT_ABORT;

	if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
				       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
		dx_csum_size = sizeof(struct ext2_dx_tail);
		de_csum_size = sizeof(struct ext2_dir_entry_tail);
	}

	/*
	 * Make sure the inode is still in use (could have been
	 * deleted in the duplicate/bad blocks pass.
	 */
	if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
		return 0;

	cd->pctx.ino = ino;
	cd->pctx.blk = block_nr;
	cd->pctx.blkcount = db->blockcnt;
	cd->pctx.ino2 = 0;
	cd->pctx.dirent = 0;
	cd->pctx.num = 0;

	if (db->blk == 0) {
		if (allocate_dir_block(ctx, db, buf, &cd->pctx))
			return 0;
		block_nr = db->blk;
	}

	if (db->blockcnt)
		dot_state = 2;
	else
		dot_state = 0;

	if (ctx->dirs_to_hash &&
	    ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
		dups_found++;

#if 0
	printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
	       db->blockcnt, ino);
#endif

	ehandler_operation(_("reading directory block"));
	cd->pctx.errcode = ext2fs_read_dir_block4(fs, block_nr, buf, 0, ino);
	ehandler_operation(0);
	if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
		cd->pctx.errcode = 0; /* We'll handle this ourselves */
	else if (cd->pctx.errcode == EXT2_ET_DIR_CSUM_INVALID) {
		cd->pctx.errcode = 0; /* We'll handle this ourselves */
		failed_csum = 1;
	}
	if (cd->pctx.errcode) {
		char *buf2;
		if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
			ctx->flags |= E2F_FLAG_ABORT;
			return DIRENT_ABORT;
		}
		ext2fs_new_dir_block(fs, db->blockcnt == 0 ? ino : 0,
				     EXT2_ROOT_INO, &buf2);
		memcpy(buf, buf2, fs->blocksize);
		ext2fs_free_mem(&buf2);
	}
#ifdef ENABLE_HTREE
	dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
	if (dx_dir && dx_dir->numblocks) {
		if (db->blockcnt >= dx_dir->numblocks) {
			if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
					&pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
				goto out_htree;
			}
			fatal_error(ctx, _("Can not continue."));
		}
		dx_db = &dx_dir->dx_block[db->blockcnt];
		dx_db->type = DX_DIRBLOCK_LEAF;
		dx_db->phys = block_nr;
		dx_db->min_hash = ~0;
		dx_db->max_hash = 0;

		dirent = (struct ext2_dir_entry *) buf;
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		limit = (struct ext2_dx_countlimit *) (buf+8);
		if (db->blockcnt == 0) {
			root = (struct ext2_dx_root_info *) (buf + 24);
			dx_db->type = DX_DIRBLOCK_ROOT;
			dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
			if ((root->reserved_zero ||
			     root->info_length < 8 ||
			     root->indirect_levels > 1) &&
			    fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
			}
			dx_dir->hashversion = root->hash_version;
			if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
			    (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
				dx_dir->hashversion += 3;
			dx_dir->depth = root->indirect_levels + 1;
		} else if ((dirent->inode == 0) &&
			   (rec_len == fs->blocksize) &&
			   (dirent->name_len == 0) &&
			   (ext2fs_le16_to_cpu(limit->limit) ==
			    ((fs->blocksize - (8 + dx_csum_size)) /
			     sizeof(struct ext2_dx_entry))))
			dx_db->type = DX_DIRBLOCK_NODE;
		is_leaf = 0;
	}
out_htree:
#endif /* ENABLE_HTREE */

	/* Verify checksum. */
	if (is_leaf && de_csum_size) {
		/* No space for csum?  Rebuild dirs in pass 3A. */
		if (!ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
			de_csum_size = 0;
			if (e2fsck_dir_will_be_rehashed(ctx, ino))
				goto skip_checksum;
			if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_MISSING_CSUM,
					 &cd->pctx))
				goto skip_checksum;
			e2fsck_rehash_dir_later(ctx, ino);
			goto skip_checksum;
		}
		if (failed_csum) {
			char *buf2;
			if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_CSUM_INVALID,
					 &cd->pctx))
				goto skip_checksum;
			ext2fs_new_dir_block(fs,
					     db->blockcnt == 0 ? ino : 0,
					     EXT2_ROOT_INO, &buf2);
			memcpy(buf, buf2, fs->blocksize);
			ext2fs_free_mem(&buf2);
			dir_modified++;
			failed_csum = 0;
		}
	}
	/* htree nodes don't use fake dirents to store checksums */
	if (!is_leaf)
		de_csum_size = 0;

skip_checksum:
	dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
	prev = 0;
	do {
		int group;
		ext2_ino_t first_unused_inode;

		problem = 0;
		dirent = (struct ext2_dir_entry *) (buf + offset);
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		cd->pctx.dirent = dirent;
		cd->pctx.num = offset;
		if (((offset + rec_len) > fs->blocksize) ||
		    (rec_len < 12) ||
		    ((rec_len % 4) != 0) ||
		    (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) {
			if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
				salvage_directory(fs, dirent, prev, &offset);
				dir_modified++;
				continue;
			} else
				goto abort_free_dict;
		}

		if (dot_state == 0) {
			if (check_dot(ctx, dirent, ino, &cd->pctx))
				dir_modified++;
		} else if (dot_state == 1) {
			ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
			if (ret < 0)
				goto abort_free_dict;
			if (ret)
				dir_modified++;
		} else if (dirent->inode == ino) {
			problem = PR_2_LINK_DOT;
			if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
		}
		if (!dirent->inode)
			goto next;

		/*
		 * Make sure the inode listed is a legal one.
		 */
		if (((dirent->inode != EXT2_ROOT_INO) &&
		     (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
		    (dirent->inode > fs->super->s_inodes_count)) {
			problem = PR_2_BAD_INO;
		} else if (ctx->inode_bb_map &&
			   (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
						     dirent->inode))) {
			/*
			 * If the inode is in a bad block, offer to
			 * clear it.
			 */
			problem = PR_2_BB_INODE;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 1) &&
			   (dirent->name[0] == '.')) {
			/*
			 * If there's a '.' entry in anything other
			 * than the first directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 2) &&
			   (dirent->name[0] == '.') &&
			   (dirent->name[1] == '.')) {
			/*
			 * If there's a '..' entry in anything other
			 * than the second directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT_DOT;
		} else if ((dot_state > 1) &&
			   (dirent->inode == EXT2_ROOT_INO)) {
			/*
			 * Don't allow links to the root directory.
			 * We check this specially to make sure we
			 * catch this error case even if the root
			 * directory hasn't been created yet.
			 */
			problem = PR_2_LINK_ROOT;
		} else if ((dot_state > 1) &&
			   (dirent->name_len & 0xFF) == 0) {
			/*
			 * Don't allow zero-length directory names.
			 */
			problem = PR_2_NULL_NAME;
		}

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/*
		 * If the inode was marked as having bad fields in
		 * pass1, process it and offer to fix/clear it.
		 * (We wait until now so that we can display the
		 * pathname to the user.)
		 */
		if (ctx->inode_bad_map &&
		    ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
					     dirent->inode)) {
			if (e2fsck_process_bad_inode(ctx, ino,
						     dirent->inode,
						     buf + fs->blocksize)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
				return DIRENT_ABORT;
		}

		group = ext2fs_group_of_ino(fs, dirent->inode);
		first_unused_inode = group * fs->super->s_inodes_per_group +
					1 + fs->super->s_inodes_per_group -
					ext2fs_bg_itable_unused(fs, group);
		cd->pctx.group = group;

		/*
		 * Check if the inode was missed out because
		 * _INODE_UNINIT flag was set or bg_itable_unused was
		 * incorrect.  If so, clear the _INODE_UNINIT flag and
		 * restart e2fsck.  In the future it would be nice if
		 * we could call a function in pass1.c that checks the
		 * newly visible inodes.
		 */
		if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
					&cd->pctx)){
				ext2fs_bg_flags_clear(fs, group,
						      EXT2_BG_INODE_UNINIT);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		} else if (dirent->inode >= first_unused_inode) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
				ext2fs_bg_itable_unused_set(fs, group, 0);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/* 
		 * Offer to clear unused inodes; if we are going to be
		 * restarting the scan due to bg_itable_unused being
		 * wrong, then don't clear any inodes to avoid zapping
		 * inodes that were skipped during pass1 due to an
		 * incorrect bg_itable_unused; we'll get any real
		 * problems after we restart.
		 */
		if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
		    !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
						dirent->inode)))
			problem = PR_2_UNUSED_INODE;

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (check_name(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

		if (check_filetype(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

#ifdef ENABLE_HTREE
		if (dx_db) {
			ext2fs_dirhash(dx_dir->hashversion, dirent->name,
				       (dirent->name_len & 0xFF),
				       fs->super->s_hash_seed, &hash, 0);
			if (hash < dx_db->min_hash)
				dx_db->min_hash = hash;
			if (hash > dx_db->max_hash)
				dx_db->max_hash = hash;
		}
#endif

		/*
		 * If this is a directory, then mark its parent in its
		 * dir_info structure.  If the parent field is already
		 * filled in, then this directory has more than one
		 * hard link.  We assume the first link is correct,
		 * and ask the user if he/she wants to clear this one.
		 */
		if ((dot_state > 1) &&
		    (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
					      dirent->inode))) {
			if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
						       &subdir_parent)) {
				cd->pctx.ino = dirent->inode;
				fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
				goto abort_free_dict;
			}
			if (subdir_parent) {
				cd->pctx.ino2 = subdir_parent;
				if (fix_problem(ctx, PR_2_LINK_DIR,
						&cd->pctx)) {
					dirent->inode = 0;
					dir_modified++;
					goto next;
				}
				cd->pctx.ino2 = 0;
			} else {
				(void) e2fsck_dir_info_set_parent(ctx,
						  dirent->inode, ino);
			}
		}

		if (dups_found) {
			;
		} else if (dict_lookup(&de_dict, dirent)) {
			clear_problem_context(&pctx);
			pctx.ino = ino;
			pctx.dirent = dirent;
			fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
			e2fsck_rehash_dir_later(ctx, ino);
			dups_found++;
		} else
			dict_alloc_insert(&de_dict, dirent, dirent);

		ext2fs_icount_increment(ctx->inode_count, dirent->inode,
					&links);
		if (links > 1)
			ctx->fs_links_count++;
		ctx->fs_total_count++;
	next:
		prev = dirent;
		if (dir_modified)
			(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		offset += rec_len;
		dot_state++;
	} while (offset < fs->blocksize - de_csum_size);
#if 0
	printf("\n");
#endif
#ifdef ENABLE_HTREE
	if (dx_db) {
#ifdef DX_DEBUG
		printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
		       db->blockcnt, dx_db->type,
		       dx_db->min_hash, dx_db->max_hash);
#endif
		cd->pctx.dir = cd->pctx.ino;
		if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
		    (dx_db->type == DX_DIRBLOCK_NODE))
			parse_int_node(fs, db, cd, dx_dir, buf, failed_csum);
	}
#endif /* ENABLE_HTREE */

	if (offset != fs->blocksize - de_csum_size) {
		cd->pctx.num = rec_len - (fs->blocksize - de_csum_size) +
			       offset;
		if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
			dirent->rec_len = cd->pctx.num;
			dir_modified++;
		}
	}
	if (dir_modified) {
		/* leaf block with no tail?  Rehash dirs later. */
		if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
				EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
		    is_leaf &&
		    !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf))
			e2fsck_rehash_dir_later(ctx, ino);

write_and_fix:
		if (e2fsck_dir_will_be_rehashed(ctx, ino))
			ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
		cd->pctx.errcode = ext2fs_write_dir_block4(fs, block_nr, buf,
							   0, ino);
		if (e2fsck_dir_will_be_rehashed(ctx, ino))
			ctx->fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
		if (cd->pctx.errcode) {
			if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
					 &cd->pctx))
				goto abort_free_dict;
		}
		ext2fs_mark_changed(fs);
	} else if (is_leaf && failed_csum && !dir_modified) {
		/*
		 * If a leaf node that fails csum makes it this far without
		 * alteration, ask the user if the checksum should be fixed.
		 */
		if (fix_problem(ctx, PR_2_LEAF_NODE_ONLY_CSUM_INVALID,
				&cd->pctx))
			goto write_and_fix;
	}
	dict_free_nodes(&de_dict);
	return 0;
abort_free_dict:
	ctx->flags |= E2F_FLAG_ABORT;
	dict_free_nodes(&de_dict);
	return DIRENT_ABORT;
}
Esempio n. 8
0
static int expand_dir_proc(ext2_filsys	fs,
			   blk64_t	*blocknr,
			   e2_blkcnt_t	blockcnt,
			   blk64_t	ref_block EXT2FS_ATTR((unused)),
			   int		ref_offset EXT2FS_ATTR((unused)),
			   void		*priv_data)
{
	struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data;
	blk64_t	new_blk;
	char		*block;
	errcode_t	retval;

	if (*blocknr) {
		if (blockcnt >= 0)
			es->goal = *blocknr;
		return 0;
	}
	if (blockcnt &&
	    (EXT2FS_B2C(fs, es->goal) == EXT2FS_B2C(fs, es->goal+1)))
		new_blk = es->goal+1;
	else {
		es->goal &= ~EXT2FS_CLUSTER_MASK(fs);
		retval = ext2fs_new_block2(fs, es->goal, 0, &new_blk);
		if (retval) {
			es->err = retval;
			return BLOCK_ABORT;
		}
		es->newblocks++;
	}
	if (blockcnt > 0) {
		retval = ext2fs_new_dir_block(fs, 0, 0, &block);
		if (retval) {
			es->err = retval;
			return BLOCK_ABORT;
		}
		es->done = 1;
		retval = ext2fs_write_dir_block(fs, new_blk, block);
	} else {
		retval = ext2fs_get_mem(fs->blocksize, &block);
		if (retval) {
			es->err = retval;
			return BLOCK_ABORT;
		}
		memset(block, 0, fs->blocksize);
		retval = io_channel_write_blk64(fs->io, new_blk, 1, block);
	}
	if (blockcnt >= 0)
		es->goal = new_blk;
	if (retval) {
		es->err = retval;
		return BLOCK_ABORT;
	}
	ext2fs_free_mem(&block);
	*blocknr = new_blk;
	ext2fs_block_alloc_stats2(fs, new_blk, +1);

	if (es->done)
		return (BLOCK_CHANGED | BLOCK_ABORT);
	else
		return BLOCK_CHANGED;
}
Esempio n. 9
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk_t			blk;
	char			*block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}

	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block(fs, 0, 0, &blk);
	if (retval)
		goto cleanup;

	/*
	 * Create a scratch template for the directory
	 */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	inode.i_blocks = fs->blocksize / 512;
	inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_ctime = inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(NULL);
	inode.i_size = fs->blocksize;

	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode); 
	if (retval)
		goto cleanup;

	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}
	
	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Esempio n. 10
0
/*
 * allocate_dir_block --- this function allocates a new directory
 * 	block for a particular inode; this is done if a directory has
 * 	a "hole" in it, or if a directory has a illegal block number
 * 	that was zeroed out and now needs to be replaced.
 */
static int allocate_dir_block(e2fsck_t ctx,
                              struct ext2_db_entry *db,
                              char *buf, struct problem_context *pctx)
{
    ext2_filsys fs = ctx->fs;
    blk_t			blk;
    char			*block;
    struct ext2_inode	inode;

    if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
        return 1;

    /*
     * Read the inode and block bitmaps in; we'll be messing with
     * them.
     */
    e2fsck_read_bitmaps(ctx);

    /*
     * First, find a free block
     */
    pctx->errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk);
    if (pctx->errcode) {
        pctx->str = "ext2fs_new_block";
        fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
        return 1;
    }
    ext2fs_mark_block_bitmap(ctx->block_found_map, blk);
    ext2fs_mark_block_bitmap(fs->block_map, blk);
    ext2fs_mark_bb_dirty(fs);

    /*
     * Now let's create the actual data block for the inode
     */
    if (db->blockcnt)
        pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
    else
        pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
                                             EXT2_ROOT_INO, &block);

    if (pctx->errcode) {
        pctx->str = "ext2fs_new_dir_block";
        fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
        return 1;
    }

    pctx->errcode = ext2fs_write_dir_block(fs, blk, block);
    ext2fs_free_mem((void **) &block);
    if (pctx->errcode) {
        pctx->str = "ext2fs_write_dir_block";
        fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
        return 1;
    }

    /*
     * Update the inode block count
     */
    e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
    inode.i_blocks += fs->blocksize / 512;
    if (inode.i_size < (db->blockcnt+1) * fs->blocksize)
        inode.i_size = (db->blockcnt+1) * fs->blocksize;
    e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");

    /*
     * Finally, update the block pointers for the inode
     */
    db->blk = blk;
    pctx->errcode = ext2fs_block_iterate2(fs, db->ino, BLOCK_FLAG_HOLE,
                                          0, update_dir_block, db);
    if (pctx->errcode) {
        pctx->str = "ext2fs_block_iterate";
        fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
        return 1;
    }

    return 0;
}
Esempio n. 11
0
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
		       const char *name)
{
	ext2_extent_handle_t	handle;
	errcode_t		retval;
	struct ext2_inode	parent_inode, inode;
	ext2_ino_t		ino = inum;
	ext2_ino_t		scratch_ino;
	blk64_t			blk;
	char			*block = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/*
	 * Allocate an inode, if necessary
	 */
	if (!ino) {
		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
					  0, &ino);
		if (retval)
			goto cleanup;
	}

	/*
	 * Allocate a data block for the directory
	 */
	retval = ext2fs_new_block2(fs, 0, 0, &blk);
	if (retval)
		goto cleanup;

	/*
	 * Create a scratch template for the directory
	 */
	retval = ext2fs_new_dir_block(fs, ino, parent, &block);
	if (retval)
		goto cleanup;

	/*
	 * Get the parent's inode, if necessary
	 */
	if (parent != ino) {
		retval = ext2fs_read_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	} else
		memset(&parent_inode, 0, sizeof(parent_inode));

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, 1);
	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS)
		inode.i_flags |= EXT4_EXTENTS_FL;
	else
		inode.i_block[0] = blk;
	inode.i_links_count = 2;
	inode.i_size = fs->blocksize;

	/*
	 * Write out the inode and inode data block
	 */
	retval = ext2fs_write_dir_block(fs, blk, block);
	if (retval)
		goto cleanup;
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
		if (retval)
			goto cleanup;
		retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
		ext2fs_extent_free(handle);
		if (retval)
			goto cleanup;
	}

	/*
	 * Link the directory into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_DIR_EXISTS;
			name = 0;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update parent inode's counts
	 */
	if (parent != ino) {
		parent_inode.i_links_count++;
		retval = ext2fs_write_inode(fs, parent, &parent_inode);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	ext2fs_block_alloc_stats2(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

cleanup:
	if (block)
		ext2fs_free_mem(&block);
	return retval;

}
Esempio n. 12
0
/*
 * This routine gets the lost_and_found inode, making it a directory
 * if necessary
 */
ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t			ino;
	blk64_t			blk;
	errcode_t		retval;
	struct ext2_inode	inode;
	char *			block;
	static const char	name[] = "lost+found";
	struct 	problem_context	pctx;
	int			will_rehash, flags;

	if (ctx->lost_and_found)
		return ctx->lost_and_found;

	clear_problem_context(&pctx);

	will_rehash = e2fsck_dir_will_be_rehashed(ctx, EXT2_ROOT_INO);
	if (will_rehash) {
		flags = ctx->fs->flags;
		ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
	}
	retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name,
			       sizeof(name)-1, 0, &ino);
	if (will_rehash)
		ctx->fs->flags = (flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) |
			(ctx->fs->flags & ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
	if (retval && !fix)
		return 0;
	if (!retval) {
		/* Lost+found shouldn't have inline data */
		retval = ext2fs_read_inode(fs, ino, &inode);
		if (fix && retval)
			return 0;

		if (fix && (inode.i_flags & EXT4_INLINE_DATA_FL)) {
			if (!fix_problem(ctx, PR_3_LPF_INLINE_DATA, &pctx))
				return 0;
			goto unlink;
		}

		if (fix && (inode.i_flags & EXT4_ENCRYPT_FL)) {
			if (!fix_problem(ctx, PR_3_LPF_ENCRYPTED, &pctx))
				return 0;
			goto unlink;
		}

		if (ext2fs_check_directory(fs, ino) == 0) {
			ctx->lost_and_found = ino;
			return ino;
		}

		/* Lost+found isn't a directory! */
		if (!fix)
			return 0;
		pctx.ino = ino;
		if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx))
			return 0;

unlink:
		/* OK, unlink the old /lost+found file. */
		pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0);
		if (pctx.errcode) {
			pctx.str = "ext2fs_unlink";
			fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
			return 0;
		}
		(void) e2fsck_dir_info_set_parent(ctx, ino, 0);
		e2fsck_adjust_inode_count(ctx, ino, -1);
		/*
		 * If the old lost+found was a directory, we've just
		 * disconnected it from the directory tree, which
		 * means we need to restart the directory tree scan.
		 * The simplest way to do this is restart the whole
		 * e2fsck operation.
		 */
		if (LINUX_S_ISDIR(inode.i_mode))
			ctx->flags |= E2F_FLAG_RESTART;
	} else if (retval != EXT2_ET_FILE_NOT_FOUND) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx);
	}
	if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0))
		return 0;

	/*
	 * Read the inode and block bitmaps in; we'll be messing with
	 * them.
	 */
	e2fsck_read_bitmaps(ctx);

	/*
	 * First, find a free block
	 */
	if (ctx->lnf_repair_block) {
		blk = ctx->lnf_repair_block;
		ctx->lnf_repair_block = 0;
		goto skip_new_block;
	}
	retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk);
	if (retval == EXT2_ET_BLOCK_ALLOC_FAIL &&
	    fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
		fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
		ctx->lost_and_found = EXT2_ROOT_INO;
		return 0;
	}
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx);
		return 0;
	}
	ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
skip_new_block:
	ext2fs_block_alloc_stats2(fs, blk, +1);

	/*
	 * Next find a free inode.
	 */
	retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700,
				  ctx->inode_used_map, &ino);
	if (retval == EXT2_ET_INODE_ALLOC_FAIL &&
	    fix_problem(ctx, PR_3_LPF_NO_SPACE, &pctx)) {
		fix_problem(ctx, PR_3_NO_SPACE_TO_RECOVER, &pctx);
		ctx->lost_and_found = EXT2_ROOT_INO;
		return 0;
	}
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx);
		return 0;
	}
	ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
	ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);

	/*
	 * Set up the inode structure
	 */
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = 040700;
	inode.i_size = fs->blocksize;
	inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now;
	inode.i_links_count = 2;
	ext2fs_iblk_set(fs, &inode, 1);
	inode.i_block[0] = blk;

	/*
	 * Next, write out the inode.
	 */
	pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode);
	if (pctx.errcode) {
		pctx.str = "ext2fs_write_inode";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Now let's create the actual data block for the inode.
	 * Due to metadata_csum, the directory block MUST be written
	 * after the inode is written to disk!
	 */
	retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx);
		return 0;
	}

	retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
	ext2fs_free_mem(&block);
	if (retval) {
		pctx.errcode = retval;
		fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx);
		return 0;
	}

	/*
	 * Finally, create the directory link
	 */
	pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR);
	if (pctx.errcode == EXT2_ET_DIR_NO_SPACE) {
		pctx.errcode = ext2fs_expand_dir(fs, EXT2_ROOT_INO);
		if (pctx.errcode)
			goto link_error;
		pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino,
					   EXT2_FT_DIR);
	}
	if (pctx.errcode) {
link_error:
		pctx.str = "ext2fs_link";
		fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx);
		return 0;
	}

	/*
	 * Miscellaneous bookkeeping that needs to be kept straight.
	 */
	e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO);
	e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1);
	ext2fs_icount_store(ctx->inode_count, ino, 2);
	ext2fs_icount_store(ctx->inode_link_info, ino, 2);
	ctx->lost_and_found = ino;
	quota_data_add(ctx->qctx, &inode, ino, fs->blocksize);
	quota_data_inodes(ctx->qctx, &inode, ino, +1);
#if 0
	printf("/lost+found created; inode #%lu\n", ino);
#endif
	return ino;
}