Method ReadDir

Kernel/src/fs/ext2.cpp:861–950

    }

    int Ext2Volume::ReadDir(Ext2Node* node, DirectoryEntry* dirent, uint32_t index){
        if((node->flags & FS_NODE_TYPE) != FS_NODE_DIRECTORY){
            return -ENOTDIR;
        }

        if(node->inode < 1){
            Log::Warning("[Ext2] ReadDir: Invalid inode: %d", node->inode);
            return -1;
        }

        ext2_inode_t& ino = node->e2inode;

        uint8_t buffer[blocksize];
        uint32_t currentBlockIndex = 0;
        uint32_t blockOffset = 0;
        uint32_t totalOffset = 0;

        ext2_directory_entry_t* e2dirent = (ext2_directory_entry_t*)buffer;

        if(ReadBlockCached(GetInodeBlock(currentBlockIndex, ino), buffer)){
            Log::Warning("[Ext2] Failed to read block %d", GetInodeBlock(currentBlockIndex, ino));
            error = DiskReadError;
            return -1;
        }

        for(unsigned i = 0; i < index; i++){
            if(e2dirent->recordLength == 0) return 0;

            blockOffset += e2dirent->recordLength;
            totalOffset += e2dirent->recordLength;

            if(e2dirent->recordLength < 8) {
                IF_DEBUG(debugLevelExt2 >= DebugLevelNormal, {
                    Log::Warning("[Ext2] Error (inode: %d) record length of directory entry is invalid (value: %d)!", node->inode, e2dirent->recordLength);
                });
                break;
            }

            if(e2dirent->inode == 0){
                index--; // Ignore the entry
            }

            if(blockOffset >= blocksize){
                currentBlockIndex++;

                if(currentBlockIndex >= ino.blockCount / (blocksize / 512)){
                    // End of dir
                    return 0;
                }

                blockOffset = 0;
                if(ReadBlockCached(GetInodeBlock(currentBlockIndex, ino), buffer)){
                    Log::Warning("[Ext2] Failed to read block");
                    return -1;
                }
            }

            e2dirent = (ext2_directory_entry_t*)(buffer + blockOffset);