MaxOS::filesystem::partition::MSDOSPartition Class Reference

Handles mounting of partitions documented in an MSDOS partition table. More...

#include <msdos.h>

Static Public Member Functions
static void	mount_partitions (drivers::disk::Disk *disk)
	read the partition table of a given hard disk

Detailed Description

Handles mounting of partitions documented in an MSDOS partition table.

Todo:

Abstract some of this into a base class and use it for GPT and other partition tables

Definition at line 350 of file msdos.h.

Member Function Documentation

mount_partitions()

void MSDOSPartition::mount_partitions ( drivers::disk::Disk *  disk )

static

read the partition table of a given hard disk

Parameters

disk	The hard disk to read the partition table from

Definition at line 23 of file msdos.cpp.

                                                {
 
    // 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";
 
        }
    }
}

References MaxOS::filesystem::VirtualFileSystem::current_file_system(), MaxOS::Logger::DEBUG(), MaxOS::Logger::Out(), MaxOS::drivers::disk::Disk::read(), and MaxOS::Logger::WARNING().

Referenced by MaxOS::drivers::disk::IntegratedDriveElectronicsController::activate().

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The documentation for this class was generated from the following files:

• /home/runner/work/MaxOS/MaxOS/kernel/include/filesystem/partition/msdos.h
• /home/runner/work/MaxOS/MaxOS/kernel/src/filesystem/partition/msdos.cpp