Пример #1
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;

	if (*block_nr == 0)
		return 0;
	if (blockcnt >= wd->outdir->num) {
		e2fsck_read_bitmaps(wd->ctx);
		blk = *block_nr;
		ext2fs_unmark_block_bitmap2(wd->ctx->block_found_map, blk);
		ext2fs_block_alloc_stats2(fs, blk, -1);
		*block_nr = 0;
		wd->cleared++;
		return BLOCK_CHANGED;
	}
	if (blockcnt < 0)
		return 0;

	dir = wd->outdir->buf + (blockcnt * fs->blocksize);
	wd->err = ext2fs_write_dir_block3(fs, *block_nr, dir, 0);
	if (wd->err)
		return BLOCK_ABORT;
	return 0;
}
Пример #2
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;
	}
}
static int set_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
			      e2_blkcnt_t blockcnt,
			      blk_t ref_block EXT2FS_ATTR((unused)),
			      int ref_offset EXT2FS_ATTR((unused)),
			      void *priv_data)
{
	struct set_badblock_record *rec = (struct set_badblock_record *)
		priv_data;
	errcode_t	retval;
	blk_t		blk;

	if (blockcnt >= 0) {
		/*
		 * Get the next bad block.
		 */
		if (!ext2fs_badblocks_list_iterate(rec->bb_iter, &blk))
			return BLOCK_ABORT;
		rec->bad_block_count++;
	} else {
		/*
		 * An indirect block; fetch a block from the
		 * previously used indirect block list.  The block
		 * most be not marked as used; if so, get another one.
		 * If we run out of reserved indirect blocks, allocate
		 * a new one.
		 */
	retry:
		if (rec->ind_blocks_ptr < rec->ind_blocks_size) {
			blk = rec->ind_blocks[rec->ind_blocks_ptr++];
			if (ext2fs_test_block_bitmap2(fs->block_map, blk))
				goto retry;
		} else {
			retval = ext2fs_new_block(fs, 0, 0, &blk);
			if (retval) {
				rec->err = retval;
				return BLOCK_ABORT;
			}
		}
		retval = io_channel_write_blk64(fs->io, blk, 1, rec->block_buf);
		if (retval) {
			rec->err = retval;
			return BLOCK_ABORT;
		}
	}

	/*
	 * Update block counts
	 */
	ext2fs_block_alloc_stats2(fs, blk, +1);

	*block_nr = blk;
	return BLOCK_CHANGED;
}
Пример #4
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;
}
static int clear_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
				e2_blkcnt_t blockcnt,
				blk_t ref_block EXT2FS_ATTR((unused)),
				int ref_offset EXT2FS_ATTR((unused)),
				void *priv_data)
{
	struct set_badblock_record *rec = (struct set_badblock_record *)
		priv_data;
	errcode_t	retval;
	unsigned long 	old_size;

	if (!*block_nr)
		return 0;

	/*
	 * If the block number is outrageous, clear it and ignore it.
	 */
	if (*block_nr >= ext2fs_blocks_count(fs->super) ||
	    *block_nr < fs->super->s_first_data_block) {
		*block_nr = 0;
		return BLOCK_CHANGED;
	}

	if (blockcnt < 0) {
		if (rec->ind_blocks_size >= rec->max_ind_blocks) {
			old_size = rec->max_ind_blocks * sizeof(blk_t);
			rec->max_ind_blocks += 10;
			retval = ext2fs_resize_mem(old_size,
				   rec->max_ind_blocks * sizeof(blk_t),
				   &rec->ind_blocks);
			if (retval) {
				rec->max_ind_blocks -= 10;
				rec->err = retval;
				return BLOCK_ABORT;
			}
		}
		rec->ind_blocks[rec->ind_blocks_size++] = *block_nr;
	}

	/*
	 * Mark the block as unused, and update accounting information
	 */
	ext2fs_block_alloc_stats2(fs, *block_nr, -1);

	*block_nr = 0;
	return BLOCK_CHANGED;
}
Пример #6
0
/*
 * This function zeros out the allocated block, and updates all of the
 * appropriate filesystem records.
 */
errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
			     char *block_buf, blk64_t *ret)
{
	errcode_t	retval;
	blk64_t		block;
	char		*buf = 0;

	if (!block_buf) {
		retval = ext2fs_get_mem(fs->blocksize, &buf);
		if (retval)
			return retval;
		block_buf = buf;
	}
	memset(block_buf, 0, fs->blocksize);

	if (fs->get_alloc_block) {
		retval = (fs->get_alloc_block)(fs, goal, &block);
		if (retval)
			goto fail;
	} else {
		if (!fs->block_map) {
			retval = ext2fs_read_block_bitmap(fs);
			if (retval)
				goto fail;
		}

		retval = ext2fs_new_block2(fs, goal, 0, &block);
		if (retval)
			goto fail;
	}

	retval = io_channel_write_blk64(fs->io, block, 1, block_buf);
	if (retval)
		goto fail;

	ext2fs_block_alloc_stats2(fs, block, +1);
	*ret = block;

fail:
	if (buf)
		ext2fs_free_mem(&buf);
	return retval;
}
Пример #7
0
/*
 * This function is called to deallocate a block, and is an interator
 * functioned called by deallocate inode via ext2fs_iterate_block().
 */
static int deallocate_inode_block(ext2_filsys fs,
				  blk64_t	*block_nr,
				  e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
				  blk64_t ref_block EXT2FS_ATTR((unused)),
				  int ref_offset EXT2FS_ATTR((unused)),
				  void *priv_data)
{
	struct del_block *p = priv_data;

	if (HOLE_BLKADDR(*block_nr))
		return 0;
	if ((*block_nr < fs->super->s_first_data_block) ||
	    (*block_nr >= ext2fs_blocks_count(fs->super)))
		return 0;
	ext2fs_unmark_block_bitmap2(p->ctx->block_found_map, *block_nr);
	ext2fs_block_alloc_stats2(fs, *block_nr, -1);
	p->num++;
	return 0;
}
Пример #8
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;

    if (*block_nr == 0)
        return 0;
    if (blockcnt >= wd->outdir->num) {
        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_unmark_block_bitmap2(wd->ctx->block_found_map,
                                        blk);
            ext2fs_block_alloc_stats2(fs, blk, -1);
            wd->cleared++;
        }
        *block_nr = 0;
        return BLOCK_CHANGED;
    }
    if (blockcnt < 0)
        return 0;

    dir = wd->outdir->buf + (blockcnt * fs->blocksize);
    wd->err = ext2fs_write_dir_block3(fs, *block_nr, dir, 0);
    if (wd->err)
        return BLOCK_ABORT;
    return 0;
}
Пример #9
0
/*
 * This function zeros out the allocated block, and updates all of the
 * appropriate filesystem records.
 */
errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
			     char *block_buf, blk64_t *ret)
{
	errcode_t	retval;
	blk64_t		block;

	if (fs->get_alloc_block) {
		retval = (fs->get_alloc_block)(fs, goal, &block);
		if (retval)
			goto fail;
	} else {
		if (!fs->block_map) {
			retval = ext2fs_read_block_bitmap(fs);
			if (retval)
				goto fail;
		}

		retval = ext2fs_new_block2(fs, goal, 0, &block);
		if (retval)
			goto fail;
	}

	if (block_buf) {
		memset(block_buf, 0, fs->blocksize);
		retval = io_channel_write_blk64(fs->io, block, 1, block_buf);
	} else
		retval = ext2fs_zero_blocks2(fs, block, 1, NULL, NULL);
	if (retval)
		goto fail;

	ext2fs_block_alloc_stats2(fs, block, +1);
	*ret = block;

fail:
	return retval;
}
Пример #10
0
static int mkjournal_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 mkjournal_struct *es = (struct mkjournal_struct *) priv_data;
	blk64_t	new_blk;
	errcode_t	retval;

	if (*blocknr) {
		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;
		}
		ext2fs_block_alloc_stats2(fs, new_blk, +1);
		es->newblocks++;
	}
	if (blockcnt >= 0)
		es->num_blocks--;

	retval = 0;
	if (blockcnt <= 0)
		retval = io_channel_write_blk64(fs->io, new_blk, 1, es->buf);
	else if (!(es->flags & EXT2_MKJOURNAL_LAZYINIT)) {
		if (es->zero_count) {
			if ((es->blk_to_zero + es->zero_count == new_blk) &&
			    (es->zero_count < 1024))
				es->zero_count++;
			else {
				retval = ext2fs_zero_blocks2(fs,
							     es->blk_to_zero,
							     es->zero_count,
							     0, 0);
				es->zero_count = 0;
			}
		}
		if (es->zero_count == 0) {
			es->blk_to_zero = new_blk;
			es->zero_count = 1;
		}
	}

	if (blockcnt == 0)
		memset(es->buf, 0, fs->blocksize);

	if (retval) {
		es->err = retval;
		return BLOCK_ABORT;
	}
	*blocknr = es->goal = new_blk;

	if (es->num_blocks == 0)
		return (BLOCK_CHANGED | BLOCK_ABORT);
	else
		return BLOCK_CHANGED;

}
Пример #11
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;
}
Пример #12
0
errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
			 const char *name, char *target)
{
	ext2_extent_handle_t	handle;
	errcode_t		retval;
	struct ext2_inode	inode;
	ext2_ino_t		scratch_ino;
	blk64_t			blk;
	int			fastlink;
	unsigned int		target_len;
	char			*block_buf = 0;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	/* The Linux kernel doesn't allow for links longer than a block */
	target_len = strlen(target);
	if (target_len > fs->blocksize) {
		retval = EXT2_ET_INVALID_ARGUMENT;
		goto cleanup;
	}

	/*
	 * Allocate a data block for slow links
	 */
	fastlink = (target_len < sizeof(inode.i_block));
	if (!fastlink) {
		retval = ext2fs_new_block2(fs, 0, 0, &blk);
		if (retval)
			goto cleanup;
		retval = ext2fs_get_mem(fs->blocksize, &block_buf);
		if (retval)
			goto cleanup;
	}

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

	/*
	 * Create the inode structure....
	 */
	memset(&inode, 0, sizeof(struct ext2_inode));
	inode.i_mode = LINUX_S_IFLNK | 0777;
	inode.i_uid = inode.i_gid = 0;
	ext2fs_iblk_set(fs, &inode, fastlink ? 0 : 1);
	inode.i_links_count = 1;
	inode.i_size = target_len;
	/* The time fields are set by ext2fs_write_new_inode() */

	if (fastlink) {
		/* Fast symlinks, target stored in inode */
		strcpy((char *)&inode.i_block, target);
	} else {
		/* Slow symlinks, target stored in the first block */
		memset(block_buf, 0, fs->blocksize);
		strcpy(block_buf, target);
		if (fs->super->s_feature_incompat &
		    EXT3_FEATURE_INCOMPAT_EXTENTS) {
			/*
			 * The extent bmap is setup after the inode and block
			 * have been written out below.
			 */
			inode.i_flags |= EXT4_EXTENTS_FL;
		}
	}

	/*
	 * Write out the inode and inode data block.  The inode generation
	 * number is assigned by write_new_inode, which means that the
	 * operations using ino must come after it.
	 */
	retval = ext2fs_write_new_inode(fs, ino, &inode);
	if (retval)
		goto cleanup;

	if (!fastlink) {
		retval = ext2fs_bmap2(fs, ino, &inode, NULL, BMAP_SET, 0, NULL,
				      &blk);
		if (retval)
			goto cleanup;

		retval = io_channel_write_blk64(fs->io, blk, 1, block_buf);
		if (retval)
			goto cleanup;
	}

	/*
	 * Link the symlink into the filesystem hierarchy
	 */
	if (name) {
		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
				       &scratch_ino);
		if (!retval) {
			retval = EXT2_ET_FILE_EXISTS;
			goto cleanup;
		}
		if (retval != EXT2_ET_FILE_NOT_FOUND)
			goto cleanup;
		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_SYMLINK);
		if (retval)
			goto cleanup;
	}

	/*
	 * Update accounting....
	 */
	if (!fastlink)
		ext2fs_block_alloc_stats2(fs, blk, +1);
	ext2fs_inode_alloc_stats2(fs, ino, +1, 0);

cleanup:
	if (block_buf)
		ext2fs_free_mem(&block_buf);
	return retval;
}
Пример #13
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;
}
Пример #14
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;

}
Пример #15
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;
}