msdos.cpp

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#include <filesystem/partition/msdos.h>
 
using namespace MaxOS;
using namespace MaxOS::common;
using namespace MaxOS::filesystem;
using namespace MaxOS::filesystem::partition;
using namespace MaxOS::filesystem::format;
using namespace MaxOS::drivers::disk;
 
void MSDOSPartition::mount_partitions(Disk* disk) {
 
    // Read the MBR from the hard disk
    MasterBootRecord mbr = {};
    buffer_t mbr_buffer(&mbr, sizeof(MasterBootRecord));
    disk->read(0, &mbr_buffer);
 
    // Check if the magic number is correct
    if (mbr.magic != 0xAA55) {
        Logger::WARNING() << "Could not find valid MBR on disk 0x" << (uint64_t) disk << "\n";
        return;
    }
 
    // Get the VFS
    VirtualFileSystem *vfs = VirtualFileSystem::current_file_system();
 
    // Loop through the primary partitions
    for (auto &entry: mbr.primary_partition) {
 
        // Empty entry
        if (entry.type == 0)
            continue;
 
        Logger::DEBUG() << "Partition 0x" << (uint64_t) entry.type << " at 0x" << (uint64_t) entry.start_LBA << ": ";
 
        // Create a file system for the partition
        switch ((PartitionType) entry.type) {
            case PartitionType::EMPTY:
                Logger::Out() << "Empty partition\n";
                break;
 
            case PartitionType::FAT32:
                Logger::Out() << "FAT32 partition\n";
                vfs->mount_filesystem(new Fat32FileSystem(disk, entry.start_LBA));
                break;
 
            case PartitionType::LINUX_EXT2:
                Logger::Out() << "EXT2 partition\n";
                vfs->mount_filesystem(new ext2::Ext2FileSystem(disk, entry.start_LBA));
                break;
 
            default:
                Logger::Out() << "Unknown or unimplemented partition type: 0x" << (uint64_t) entry.type << "\n";
 
        }
    }
}