void do_dirsearch(int argc, char *argv[])
{
	ext2_ino_t	inode;
	struct process_block_struct pb;

	if (check_fs_open(argv[0]))
		return;

	if (argc != 3) {
		com_err(0, 0, "Usage: dirsearch dir filename");
		return;
	}

	inode = string_to_inode(argv[1]);
	if (!inode)
		return;

	pb.buf = malloc(current_fs->blocksize);
	if (!pb.buf) {
		com_err("dirsearch", 0, "Couldn't allocate buffer");
		return;
	}
	pb.search_name = argv[2];
	pb.len = strlen(pb.search_name);

	ext2fs_block_iterate3(current_fs, inode, BLOCK_FLAG_READ_ONLY, 0,
			      search_dir_block, &pb);

	free(pb.buf);
}
Beispiel #2
0
static int fix_directory(ext2_filsys fs,
			 struct ext2_db_entry2 *db,
			 void *priv_data)
{
	errcode_t	retval;

	empty_dir_info edi = (empty_dir_info) priv_data;

	edi->logblk = 0;
	edi->freed_blocks = 0;
	edi->ino = db->ino;

	retval = ext2fs_read_inode(fs, db->ino, &edi->inode);
	if (retval)
		return 0;

	retval = ext2fs_block_iterate3(fs, db->ino, 0, edi->block_buf,
				       empty_pass1, edi);
	if (retval)
		return 0;

	if (edi->freed_blocks) {
		edi->inode.i_size -= edi->freed_blocks * fs->blocksize;
		ext2fs_iblk_add_blocks(fs, &edi->inode, edi->freed_blocks);
		retval = ext2fs_write_inode(fs, db->ino, &edi->inode);
		if (retval)
			return 0;
	}
	return 0;
}
Beispiel #3
0
/*
 * This fuction deallocates an inode
 */
static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
{
	ext2_filsys fs = ctx->fs;
	struct ext2_inode	inode;
	struct problem_context	pctx;
	__u32			count;
	struct del_block	del_block;

	e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
	e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
	clear_problem_context(&pctx);
	pctx.ino = ino;

	/*
	 * Fix up the bitmaps...
	 */
	e2fsck_read_bitmaps(ctx);
	ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));

	if (ext2fs_file_acl_block(fs, &inode) &&
	    (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
		pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
				ext2fs_file_acl_block(fs, &inode),
				block_buf, -1, &count, ino);
		if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
			pctx.errcode = 0;
			count = 1;
		}
		if (pctx.errcode) {
			pctx.blk = ext2fs_file_acl_block(fs, &inode);
			fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			return;
		}
		if (count == 0) {
			ext2fs_unmark_block_bitmap2(ctx->block_found_map,
					ext2fs_file_acl_block(fs, &inode));
			ext2fs_block_alloc_stats2(fs,
				  ext2fs_file_acl_block(fs, &inode), -1);
		}
		ext2fs_file_acl_block_set(fs, &inode, 0);
	}

	if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
		return;

	if (LINUX_S_ISREG(inode.i_mode) && EXT2_I_SIZE(&inode) >= 0x80000000UL)
		ctx->large_files--;

	del_block.ctx = ctx;
	del_block.num = 0;
	pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
					     deallocate_inode_block,
					     &del_block);
	if (pctx.errcode) {
		fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
}
Beispiel #4
0
static errcode_t write_directory(e2fsck_t ctx, ext2_filsys fs,
				 struct out_dir *outdir,
				 ext2_ino_t ino, int compress)
{
	struct write_dir_struct wd;
	errcode_t	retval;
	struct ext2_inode 	inode;

	retval = e2fsck_expand_directory(ctx, ino, -1, outdir->num);
	if (retval)
		return retval;

	wd.outdir = outdir;
	wd.err = 0;
	wd.ctx = ctx;
	wd.cleared = 0;

	retval = ext2fs_block_iterate3(fs, ino, 0, 0,
				       write_dir_block, &wd);
	if (retval)
		return retval;
	if (wd.err)
		return wd.err;

	e2fsck_read_inode(ctx, ino, &inode, "rehash_dir");
	if (compress)
		inode.i_flags &= ~EXT2_INDEX_FL;
	else
		inode.i_flags |= EXT2_INDEX_FL;
	inode.i_size = outdir->num * fs->blocksize;
	ext2fs_iblk_sub_blocks(fs, &inode, wd.cleared);
	e2fsck_write_inode(ctx, ino, &inode, "rehash_dir");

	return 0;
}
Beispiel #5
0
errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir)
{
	errcode_t	retval;
	struct expand_dir_struct es;
	struct ext2_inode	inode;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	if (!(fs->flags & EXT2_FLAG_RW))
		return EXT2_ET_RO_FILSYS;

	if (!fs->block_map)
		return EXT2_ET_NO_BLOCK_BITMAP;

	retval = ext2fs_check_directory(fs, dir);
	if (retval)
		return retval;

	es.done = 0;
	es.err = 0;
	es.goal = 0;
	es.newblocks = 0;
	es.dir = dir;

	retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_APPEND,
				       0, expand_dir_proc, &es);

	if (es.err)
		return es.err;
	if (!es.done)
		return EXT2_ET_EXPAND_DIR_ERR;

	/*
	 * Update the size and block count fields in the inode.
	 */
	retval = ext2fs_read_inode(fs, dir, &inode);
	if (retval)
		return retval;

	inode.i_size += fs->blocksize;
	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);

	retval = ext2fs_write_inode(fs, dir, &inode);
	if (retval)
		return retval;

	return 0;
}
Beispiel #6
0
static errcode_t write_directory(e2fsck_t ctx, ext2_filsys fs,
				 struct out_dir *outdir,
				 ext2_ino_t ino, struct ext2_inode *inode,
				 int compress)
{
	struct write_dir_struct wd;
	errcode_t	retval;

	retval = e2fsck_expand_directory(ctx, ino, -1, outdir->num);
	if (retval)
		return retval;

	wd.outdir = outdir;
	wd.err = 0;
	wd.ino = ino;
	wd.ctx = ctx;
	wd.dir = ino;

	retval = ext2fs_block_iterate3(fs, ino, 0, NULL,
				       write_dir_block, &wd);
	if (retval)
		return retval;
	if (wd.err)
		return wd.err;

	e2fsck_read_inode(ctx, ino, inode, "rehash_dir");
	if (compress)
		inode->i_flags &= ~EXT2_INDEX_FL;
	else
		inode->i_flags |= EXT2_INDEX_FL;
#ifdef REHASH_DEBUG
	printf("%u: set inode size to %u blocks = %u bytes\n",
	       ino, outdir->num, outdir->num * fs->blocksize);
#endif
	retval = ext2fs_inode_size_set(fs, inode, (ext2_off64_t)outdir->num *
						   fs->blocksize);
	if (retval)
		return retval;

	/* ext2fs_punch() calls ext2fs_write_inode() which writes the size */
	return ext2fs_punch(fs, ino, inode, NULL, outdir->num, ~0ULL);
}
Beispiel #7
0
/*
 * This function creates a journal using direct I/O routines.
 */
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
				     blk_t num_blocks, int flags)
{
	char			*buf;
	dgrp_t			group, start, end, i, log_flex;
	errcode_t		retval;
	struct ext2_inode	inode;
	unsigned long long	inode_size;
	struct mkjournal_struct	es;

	if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
						       &buf)))
		return retval;

	if ((retval = ext2fs_read_bitmaps(fs)))
		goto out2;

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto out2;

	if (inode.i_blocks > 0) {
		retval = EEXIST;
		goto out2;
	}

	es.num_blocks = num_blocks;
	es.newblocks = 0;
	es.buf = buf;
	es.err = 0;
	es.flags = flags;
	es.zero_count = 0;

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		inode.i_flags |= EXT4_EXTENTS_FL;
		if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
			goto out2;
	}

	/*
	 * Set the initial goal block to be roughly at the middle of
	 * the filesystem.  Pick a group that has the largest number
	 * of free blocks.
	 */
	group = ext2fs_group_of_blk2(fs, (ext2fs_blocks_count(fs->super) -
					 fs->super->s_first_data_block) / 2);
	log_flex = 1 << fs->super->s_log_groups_per_flex;
	if (fs->super->s_log_groups_per_flex && (group > log_flex)) {
		group = group & ~(log_flex - 1);
		while ((group < fs->group_desc_count) &&
		       ext2fs_bg_free_blocks_count(fs, group) == 0)
			group++;
		if (group == fs->group_desc_count)
			group = 0;
		start = group;
	} else
		start = (group > 0) ? group-1 : group;
	end = ((group+1) < fs->group_desc_count) ? group+1 : group;
	group = start;
	for (i=start+1; i <= end; i++)
		if (ext2fs_bg_free_blocks_count(fs, i) >
		    ext2fs_bg_free_blocks_count(fs, group))
			group = i;

	es.goal = ext2fs_group_first_block2(fs, group);
	retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
				       0, mkjournal_proc, &es);
	if (es.err) {
		retval = es.err;
		goto errout;
	}
	if (es.zero_count) {
		retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
					    es.zero_count, 0, 0);
		if (retval)
			goto errout;
	}

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto errout;

	inode_size = (unsigned long long)fs->blocksize * num_blocks;
	inode.i_size = inode_size & 0xFFFFFFFF;
	inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF;
	if (ext2fs_needs_large_file_feature(inode_size))
		fs->super->s_feature_ro_compat |=
			EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	inode.i_mode = LINUX_S_IFREG | 0600;

	if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
		goto errout;
	retval = 0;

	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
	fs->super->s_jnl_blocks[15] = inode.i_size_high;
	fs->super->s_jnl_blocks[16] = inode.i_size;
	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
	ext2fs_mark_super_dirty(fs);

errout:
	ext2fs_zero_blocks2(0, 0, 0, 0, 0);
out2:
	ext2fs_free_mem(&buf);
	return retval;
}
Beispiel #8
0
errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino,
			    struct problem_context *pctx)
{
	ext2_filsys 		fs = ctx->fs;
	errcode_t		retval;
	struct ext2_inode 	inode;
	char			*dir_buf = 0;
	struct fill_dir_struct	fd;
	struct out_dir		outdir;

	outdir.max = outdir.num = 0;
	outdir.buf = 0;
	outdir.hashes = 0;
	e2fsck_read_inode(ctx, ino, &inode, "rehash_dir");

	if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
				      EXT4_FEATURE_INCOMPAT_INLINE_DATA) &&
	   (inode.i_flags & EXT4_INLINE_DATA_FL))
		return 0;

	retval = ENOMEM;
	fd.harray = 0;
	dir_buf = malloc(inode.i_size);
	if (!dir_buf)
		goto errout;

	fd.max_array = inode.i_size / 32;
	fd.num_array = 0;
	fd.harray = malloc(fd.max_array * sizeof(struct hash_entry));
	if (!fd.harray)
		goto errout;

	fd.ctx = ctx;
	fd.buf = dir_buf;
	fd.inode = &inode;
	fd.ino = ino;
	fd.err = 0;
	fd.dir_size = 0;
	fd.compress = 0;
	fd.dir = ino;
	if (!(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
	    (inode.i_size / fs->blocksize) < 2)
		fd.compress = 1;
	fd.parent = 0;

retry_nohash:
	/* Read in the entire directory into memory */
	retval = ext2fs_block_iterate3(fs, ino, 0, 0,
				       fill_dir_block, &fd);
	if (fd.err) {
		retval = fd.err;
		goto errout;
	}

	/* 
	 * If the entries read are less than a block, then don't index
	 * the directory
	 */
	if (!fd.compress && (fd.dir_size < (fs->blocksize - 24))) {
		fd.compress = 1;
		fd.dir_size = 0;
		fd.num_array = 0;
		goto retry_nohash;
	}

#if 0
	printf("%d entries (%d bytes) found in inode %d\n",
	       fd.num_array, fd.dir_size, ino);
#endif

	/* Sort the list */
resort:
	if (fd.compress && fd.num_array > 1)
		qsort(fd.harray+2, fd.num_array-2, sizeof(struct hash_entry),
		      hash_cmp);
	else
		qsort(fd.harray, fd.num_array, sizeof(struct hash_entry),
		      hash_cmp);

	/*
	 * Look for duplicates
	 */
	if (duplicate_search_and_fix(ctx, fs, ino, &fd))
		goto resort;

	if (ctx->options & E2F_OPT_NO) {
		retval = 0;
		goto errout;
	}

	/* Sort non-hashed directories by inode number */
	if (fd.compress && fd.num_array > 1)
		qsort(fd.harray+2, fd.num_array-2,
		      sizeof(struct hash_entry), ino_cmp);

	/*
	 * Copy the directory entries.  In a htree directory these
	 * will become the leaf nodes.
	 */
	retval = copy_dir_entries(ctx, &fd, &outdir);
	if (retval)
		goto errout;

	free(dir_buf); dir_buf = 0;

	if (!fd.compress) {
		/* Calculate the interior nodes */
		retval = calculate_tree(fs, &outdir, ino, fd.parent);
		if (retval)
			goto errout;
	}

	retval = write_directory(ctx, fs, &outdir, ino, &inode, fd.compress);
	if (retval)
		goto errout;

	if (ctx->options & E2F_OPT_CONVERT_BMAP)
		retval = e2fsck_rebuild_extents_later(ctx, ino);
	else
		retval = e2fsck_check_rebuild_extents(ctx, ino, &inode, pctx);
errout:
	free(dir_buf);
	free(fd.harray);

	free_out_dir(&outdir);
	return retval;
}
static errcode_t e2fsck_get_journal(e2fsck_t ctx, journal_t **ret_journal)
{
	struct process_block_struct pb;
	struct ext2_super_block *sb = ctx->fs->super;
	struct ext2_super_block jsuper;
	struct problem_context	pctx;
	struct buffer_head 	*bh;
	struct inode		*j_inode = NULL;
	struct kdev_s		*dev_fs = NULL, *dev_journal;
	const char		*journal_name = 0;
	journal_t		*journal = NULL;
	errcode_t		retval = 0;
	io_manager		io_ptr = 0;
	unsigned long long	start = 0;
	int			ext_journal = 0;
	int			tried_backup_jnl = 0;

	clear_problem_context(&pctx);

	journal = e2fsck_allocate_memory(ctx, sizeof(journal_t), "journal");
	if (!journal) {
		return EXT2_ET_NO_MEMORY;
	}

	dev_fs = e2fsck_allocate_memory(ctx, 2*sizeof(struct kdev_s), "kdev");
	if (!dev_fs) {
		retval = EXT2_ET_NO_MEMORY;
		goto errout;
	}
	dev_journal = dev_fs+1;

	dev_fs->k_ctx = dev_journal->k_ctx = ctx;
	dev_fs->k_dev = K_DEV_FS;
	dev_journal->k_dev = K_DEV_JOURNAL;

	journal->j_dev = dev_journal;
	journal->j_fs_dev = dev_fs;
	journal->j_inode = NULL;
	journal->j_blocksize = ctx->fs->blocksize;

	if (uuid_is_null(sb->s_journal_uuid)) {
		if (!sb->s_journal_inum) {
			retval = EXT2_ET_BAD_INODE_NUM;
			goto errout;
		}
		j_inode = e2fsck_allocate_memory(ctx, sizeof(*j_inode),
						 "journal inode");
		if (!j_inode) {
			retval = EXT2_ET_NO_MEMORY;
			goto errout;
		}

		j_inode->i_ctx = ctx;
		j_inode->i_ino = sb->s_journal_inum;

		if ((retval = ext2fs_read_inode(ctx->fs,
						sb->s_journal_inum,
						&j_inode->i_ext2))) {
		try_backup_journal:
			if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS ||
			    tried_backup_jnl)
				goto errout;
			memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode));
			memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks,
			       EXT2_N_BLOCKS*4);
			j_inode->i_ext2.i_size_high = sb->s_jnl_blocks[15];
			j_inode->i_ext2.i_size = sb->s_jnl_blocks[16];
			j_inode->i_ext2.i_links_count = 1;
			j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600;
			e2fsck_use_inode_shortcuts(ctx, 1);
			ctx->stashed_ino = j_inode->i_ino;
			ctx->stashed_inode = &j_inode->i_ext2;
			tried_backup_jnl++;
		}
		if (!j_inode->i_ext2.i_links_count ||
		    !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) {
			retval = EXT2_ET_NO_JOURNAL;
			goto try_backup_journal;
		}
		if (EXT2_I_SIZE(&j_inode->i_ext2) / journal->j_blocksize <
		    JFS_MIN_JOURNAL_BLOCKS) {
			retval = EXT2_ET_JOURNAL_TOO_SMALL;
			goto try_backup_journal;
		}
		pb.last_block = -1;
		retval = ext2fs_block_iterate3(ctx->fs, j_inode->i_ino,
					       BLOCK_FLAG_HOLE, 0,
					       process_journal_block, &pb);
		if ((pb.last_block + 1) * ctx->fs->blocksize <
		    EXT2_I_SIZE(&j_inode->i_ext2)) {
			retval = EXT2_ET_JOURNAL_TOO_SMALL;
			goto try_backup_journal;
		}
		if (tried_backup_jnl && !(ctx->options & E2F_OPT_READONLY)) {
			retval = ext2fs_write_inode(ctx->fs, sb->s_journal_inum,
						    &j_inode->i_ext2);
			if (retval)
				goto errout;
		}

		journal->j_maxlen = EXT2_I_SIZE(&j_inode->i_ext2) /
			journal->j_blocksize;

#ifdef USE_INODE_IO
		retval = ext2fs_inode_io_intern2(ctx->fs, sb->s_journal_inum,
						 &j_inode->i_ext2,
						 &journal_name);
		if (retval)
			goto errout;

		io_ptr = inode_io_manager;
#else
		journal->j_inode = j_inode;
		ctx->journal_io = ctx->fs->io;
		if ((retval = journal_bmap(journal, 0, &start)) != 0)
			goto errout;
#endif
	} else {
		ext_journal = 1;
		if (!ctx->journal_name) {
			char uuid[37];

			uuid_unparse(sb->s_journal_uuid, uuid);
			ctx->journal_name = blkid_get_devname(ctx->blkid,
							      "UUID", uuid);
			if (!ctx->journal_name)
				ctx->journal_name = blkid_devno_to_devname(sb->s_journal_dev);
		}
		journal_name = ctx->journal_name;

		if (!journal_name) {
			fix_problem(ctx, PR_0_CANT_FIND_JOURNAL, &pctx);
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			goto errout;
		}

		jfs_debug(1, "Using journal file %s\n", journal_name);
		io_ptr = unix_io_manager;
	}

#if 0
	test_io_backing_manager = io_ptr;
	io_ptr = test_io_manager;
#endif
#ifndef USE_INODE_IO
	if (ext_journal)
#endif
		retval = io_ptr->open(journal_name,
				      IO_FLAG_RW | IO_FLAG_EXCLUSIVE,
				      &ctx->journal_io);
	if (retval)
		goto errout;

	io_channel_set_blksize(ctx->journal_io, ctx->fs->blocksize);

	if (ext_journal) {
		if (ctx->fs->blocksize == 1024)
			start = 1;
		bh = getblk(dev_journal, start, ctx->fs->blocksize);
		if (!bh) {
			retval = EXT2_ET_NO_MEMORY;
			goto errout;
		}
		ll_rw_block(READ, 1, &bh);
		if ((retval = bh->b_err) != 0) {
			brelse(bh);
			goto errout;
		}
		memcpy(&jsuper, start ? bh->b_data :  bh->b_data + 1024,
		       sizeof(jsuper));
		brelse(bh);
#ifdef WORDS_BIGENDIAN
		if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
			ext2fs_swap_super(&jsuper);
#endif
		if (jsuper.s_magic != EXT2_SUPER_MAGIC ||
		    !(jsuper.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
			fix_problem(ctx, PR_0_EXT_JOURNAL_BAD_SUPER, &pctx);
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			goto errout;
		}
		/* Make sure the journal UUID is correct */
		if (memcmp(jsuper.s_uuid, ctx->fs->super->s_journal_uuid,
			   sizeof(jsuper.s_uuid))) {
			fix_problem(ctx, PR_0_JOURNAL_BAD_UUID, &pctx);
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			goto errout;
		}

		journal->j_maxlen = ext2fs_blocks_count(&jsuper);
		start++;
	}

	if (!(bh = getblk(dev_journal, start, journal->j_blocksize))) {
		retval = EXT2_ET_NO_MEMORY;
		goto errout;
	}

	journal->j_sb_buffer = bh;
	journal->j_superblock = (journal_superblock_t *)bh->b_data;

#ifdef USE_INODE_IO
	if (j_inode)
		ext2fs_free_mem(&j_inode);
#endif

	*ret_journal = journal;
	e2fsck_use_inode_shortcuts(ctx, 0);
	return 0;

errout:
	e2fsck_use_inode_shortcuts(ctx, 0);
	if (dev_fs)
		ext2fs_free_mem(&dev_fs);
	if (j_inode)
		ext2fs_free_mem(&j_inode);
	if (journal)
		ext2fs_free_mem(&journal);
	return retval;
}
Beispiel #10
0
/*
 * This function creates a journal using direct I/O routines.
 */
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
				     blk_t num_blocks, blk64_t goal, int flags)
{
	char			*buf;
	errcode_t		retval;
	struct ext2_inode	inode;
	unsigned long long	inode_size;
	struct mkjournal_struct	es;

	if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
						       &buf)))
		return retval;

	if ((retval = ext2fs_read_bitmaps(fs)))
		goto out2;

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto out2;

	if (inode.i_blocks > 0) {
		retval = EEXIST;
		goto out2;
	}

	es.num_blocks = num_blocks;
	es.newblocks = 0;
	es.buf = buf;
	es.err = 0;
	es.flags = flags;
	es.zero_count = 0;
	es.goal = (goal != ~0ULL) ? goal : get_midpoint_journal_block(fs);

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		inode.i_flags |= EXT4_EXTENTS_FL;
		if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
			goto out2;
	}

	retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
				       0, mkjournal_proc, &es);
	if (retval)
		goto out2;
	if (es.err) {
		retval = es.err;
		goto out2;
	}
	if (es.zero_count) {
		retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
					    es.zero_count, 0, 0);
		if (retval)
			goto out2;
	}

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto out2;

	inode_size = (unsigned long long)fs->blocksize * num_blocks;
	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	inode.i_mode = LINUX_S_IFREG | 0600;
	retval = ext2fs_inode_size_set(fs, &inode, inode_size);
	if (retval)
		goto out2;

	if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
		goto out2;
	retval = 0;

	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
	fs->super->s_jnl_blocks[15] = inode.i_size_high;
	fs->super->s_jnl_blocks[16] = inode.i_size;
	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
	ext2fs_mark_super_dirty(fs);

out2:
	ext2fs_free_mem(&buf);
	return retval;
}
errcode_t ext2fs_move_blocks(ext2_filsys fs,
			     ext2fs_block_bitmap reserve,
			     ext2fs_block_bitmap alloc_map,
			     int flags)
{
	ext2_ino_t	ino;
	struct ext2_inode inode;
	errcode_t	retval;
	struct process_block_struct pb;
	ext2_inode_scan	scan;
	char		*block_buf;

	retval = ext2fs_open_inode_scan(fs, 0, &scan);
	if (retval)
		return retval;

	pb.reserve = reserve;
	pb.error = 0;
	pb.alloc_map = alloc_map ? alloc_map : fs->block_map;
	pb.flags = flags;

	retval = ext2fs_get_array(4, fs->blocksize, &block_buf);
	if (retval)
		return retval;
	pb.buf = block_buf + fs->blocksize * 3;

	/*
	 * If GET_DBLIST is set in the flags field, then we should
	 * gather directory block information while we're doing the
	 * block move.
	 */
	if (flags & EXT2_BMOVE_GET_DBLIST) {
		if (fs->dblist) {
			ext2fs_free_dblist(fs->dblist);
			fs->dblist = NULL;
		}
		retval = ext2fs_init_dblist(fs, 0);
		if (retval)
			return retval;
	}

	retval = ext2fs_get_next_inode(scan, &ino, &inode);
	if (retval)
		return retval;

	while (ino) {
		if ((inode.i_links_count == 0) ||
		    !ext2fs_inode_has_valid_blocks2(fs, &inode))
			goto next;

		pb.ino = ino;
		pb.inode = &inode;

		pb.add_dir = (LINUX_S_ISDIR(inode.i_mode) &&
			      flags & EXT2_BMOVE_GET_DBLIST);

		retval = ext2fs_block_iterate3(fs, ino, 0, block_buf,
					       process_block, &pb);
		if (retval)
			return retval;
		if (pb.error)
			return pb.error;

	next:
		retval = ext2fs_get_next_inode(scan, &ino, &inode);
		if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)
			goto next;
	}
	return 0;
}
Beispiel #12
0
static errcode_t ext2fs_get_journal(ext2_filsys fs, journal_t **ret_journal)
{
	struct process_block_struct pb;
	struct ext2_super_block *sb = fs->super;
	struct ext2_super_block jsuper;
	struct buffer_head	*bh;
	struct inode		*j_inode = NULL;
	struct kdev_s		*dev_fs = NULL, *dev_journal;
	const char		*journal_name = 0;
	journal_t		*journal = NULL;
	errcode_t		retval = 0;
	io_manager		io_ptr = 0;
	unsigned long long	start = 0;
	int			ext_journal = 0;
	int			tried_backup_jnl = 0;

	retval = ext2fs_get_memzero(sizeof(journal_t), &journal);
	if (retval)
		return retval;

	retval = ext2fs_get_memzero(2 * sizeof(struct kdev_s), &dev_fs);
	if (retval)
		goto errout;
	dev_journal = dev_fs+1;

	dev_fs->k_fs = dev_journal->k_fs = fs;
	dev_fs->k_dev = K_DEV_FS;
	dev_journal->k_dev = K_DEV_JOURNAL;

	journal->j_dev = dev_journal;
	journal->j_fs_dev = dev_fs;
	journal->j_inode = NULL;
	journal->j_blocksize = fs->blocksize;

	if (uuid_is_null(sb->s_journal_uuid)) {
		if (!sb->s_journal_inum) {
			retval = EXT2_ET_BAD_INODE_NUM;
			goto errout;
		}
		retval = ext2fs_get_memzero(sizeof(*j_inode), &j_inode);
		if (retval)
			goto errout;

		j_inode->i_fs = fs;
		j_inode->i_ino = sb->s_journal_inum;

		retval = ext2fs_read_inode(fs, sb->s_journal_inum,
					   &j_inode->i_ext2);
		if (retval) {
try_backup_journal:
			if (sb->s_jnl_backup_type != EXT3_JNL_BACKUP_BLOCKS ||
			    tried_backup_jnl)
				goto errout;
			memset(&j_inode->i_ext2, 0, sizeof(struct ext2_inode));
			memcpy(&j_inode->i_ext2.i_block[0], sb->s_jnl_blocks,
			       EXT2_N_BLOCKS*4);
			j_inode->i_ext2.i_size_high = sb->s_jnl_blocks[15];
			j_inode->i_ext2.i_size = sb->s_jnl_blocks[16];
			j_inode->i_ext2.i_links_count = 1;
			j_inode->i_ext2.i_mode = LINUX_S_IFREG | 0600;
			tried_backup_jnl++;
		}
		if (!j_inode->i_ext2.i_links_count ||
		    !LINUX_S_ISREG(j_inode->i_ext2.i_mode)) {
			retval = EXT2_ET_NO_JOURNAL;
			goto try_backup_journal;
		}
		if (EXT2_I_SIZE(&j_inode->i_ext2) / journal->j_blocksize <
		    JFS_MIN_JOURNAL_BLOCKS) {
			retval = EXT2_ET_JOURNAL_TOO_SMALL;
			goto try_backup_journal;
		}
		pb.last_block = -1;
		retval = ext2fs_block_iterate3(fs, j_inode->i_ino,
					       BLOCK_FLAG_HOLE, 0,
					       process_journal_block, &pb);
		if ((pb.last_block + 1) * fs->blocksize <
		    (int) EXT2_I_SIZE(&j_inode->i_ext2)) {
			retval = EXT2_ET_JOURNAL_TOO_SMALL;
			goto try_backup_journal;
		}
		if (tried_backup_jnl && (fs->flags & EXT2_FLAG_RW)) {
			retval = ext2fs_write_inode(fs, sb->s_journal_inum,
						    &j_inode->i_ext2);
			if (retval)
				goto errout;
		}

		journal->j_maxlen = EXT2_I_SIZE(&j_inode->i_ext2) /
			journal->j_blocksize;

#ifdef USE_INODE_IO
		retval = ext2fs_inode_io_intern2(fs, sb->s_journal_inum,
						 &j_inode->i_ext2,
						 &journal_name);
		if (retval)
			goto errout;

		io_ptr = inode_io_manager;
#else
		journal->j_inode = j_inode;
		fs->journal_io = fs->io;
		retval = (errcode_t)journal_bmap(journal, 0, &start);
		if (retval)
			goto errout;
#endif
	} else {
		ext_journal = 1;
		if (!fs->journal_name) {
			char uuid[37];
			blkid_cache blkid;

			blkid_get_cache(&blkid, NULL);
			uuid_unparse(sb->s_journal_uuid, uuid);
			fs->journal_name = blkid_get_devname(blkid,
							      "UUID", uuid);
			if (!fs->journal_name)
				fs->journal_name = blkid_devno_to_devname(sb->s_journal_dev);
			blkid_put_cache(blkid);
		}
		journal_name = fs->journal_name;

		if (!journal_name) {
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			goto errout;
		}

		jfs_debug(1, "Using journal file %s\n", journal_name);
		io_ptr = unix_io_manager;
	}

#if 0
	test_io_backing_manager = io_ptr;
	io_ptr = test_io_manager;
#endif
#ifndef USE_INODE_IO
	if (ext_journal)
#endif
	{
		retval = io_ptr->open(journal_name, fs->flags & EXT2_FLAG_RW,
				      &fs->journal_io);
	}
	if (retval)
		goto errout;

	io_channel_set_blksize(fs->journal_io, fs->blocksize);

	if (ext_journal) {
		blk64_t maxlen;

		start = ext2fs_journal_sb_start(fs->blocksize) - 1;
		bh = getblk(dev_journal, start, fs->blocksize);
		if (!bh) {
			retval = EXT2_ET_NO_MEMORY;
			goto errout;
		}
		ll_rw_block(READ, 1, &bh);
		retval = bh->b_err;
		if (retval) {
			brelse(bh);
			goto errout;
		}
		memcpy(&jsuper, start ? bh->b_data :
				bh->b_data + SUPERBLOCK_OFFSET,
		       sizeof(jsuper));
#ifdef WORDS_BIGENDIAN
		if (jsuper.s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
			ext2fs_swap_super(&jsuper);
#endif
		if (jsuper.s_magic != EXT2_SUPER_MAGIC ||
		    !ext2fs_has_feature_journal_dev(&jsuper)) {
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			brelse(bh);
			goto errout;
		}
		/* Make sure the journal UUID is correct */
		if (memcmp(jsuper.s_uuid, fs->super->s_journal_uuid,
			   sizeof(jsuper.s_uuid))) {
			retval = EXT2_ET_LOAD_EXT_JOURNAL;
			brelse(bh);
			goto errout;
		}

		/* Check the superblock checksum */
		if (ext2fs_has_feature_metadata_csum(&jsuper)) {
			struct struct_ext2_filsys fsx;
			struct ext2_super_block	superx;
			void *p;

			p = start ? bh->b_data : bh->b_data + SUPERBLOCK_OFFSET;
			memcpy(&fsx, fs, sizeof(fsx));
			memcpy(&superx, fs->super, sizeof(superx));
			fsx.super = &superx;
			ext2fs_set_feature_metadata_csum(fsx.super);
			if (!ext2fs_superblock_csum_verify(&fsx, p)) {
				retval = EXT2_ET_LOAD_EXT_JOURNAL;
				brelse(bh);
				goto errout;
			}
		}
		brelse(bh);

		maxlen = ext2fs_blocks_count(&jsuper);
		journal->j_maxlen = (maxlen < 1ULL << 32) ? maxlen :
				    (1ULL << 32) - 1;
		start++;
	}

	bh = getblk(dev_journal, start, journal->j_blocksize);
	if (!bh) {
		retval = EXT2_ET_NO_MEMORY;
		goto errout;
	}

	journal->j_sb_buffer = bh;
	journal->j_superblock = (journal_superblock_t *)bh->b_data;

#ifdef USE_INODE_IO
	if (j_inode)
		ext2fs_free_mem(&j_inode);
#endif

	*ret_journal = journal;
	return 0;

errout:
	if (dev_fs)
		ext2fs_free_mem(&dev_fs);
	if (j_inode)
		ext2fs_free_mem(&j_inode);
	if (journal)
		ext2fs_free_mem(&journal);
	return retval;
}