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Kernel: Rewrite DiskCache

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We now cache only clean pages since I don't want to think about
syncing the disk later.
This commit is contained in:
Bananymous
2023-07-27 21:57:32 +03:00
parent 2f52001c6d
commit 104894c0c7
4 changed files with 110 additions and 217 deletions
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17
kernel/include/kernel/Storage/DiskCache.h
View File

@@ -7,16 +7,14 @@
namespace Kernel
{
class StorageDevice;
class DiskCache
{
public:
DiskCache(StorageDevice&);
DiskCache(size_t sector_size);
~DiskCache();
BAN::ErrorOr<void> read_sector(uint64_t sector, uint8_t* buffer);
BAN::ErrorOr<void> write_sector(uint64_t sector, const uint8_t* buffer);
bool read_from_cache(uint64_t sector, uint8_t* buffer);
BAN::ErrorOr<void> write_to_cache(uint64_t sector, const uint8_t* buffer, bool dirty);
void sync();
size_t release_clean_pages(size_t);
@@ -30,16 +28,11 @@ namespace Kernel
uint64_t first_sector { 0 };
uint8_t sector_mask { 0 };
uint8_t dirty_mask { 0 };
void sync(StorageDevice&);
BAN::ErrorOr<void> read_sector(StorageDevice&, uint64_t sector, uint8_t* buffer);
BAN::ErrorOr<void> write_sector(StorageDevice&, uint64_t sector, const uint8_t* buffer);
};
private:
SpinLock m_lock;
StorageDevice& m_device;
BAN::Vector<PageCache> m_cache;
const size_t m_sector_size;
BAN::Vector<PageCache> m_cache;
};
}

4
kernel/include/kernel/Storage/StorageDevice.h
View File

@@ -81,8 +81,8 @@ namespace Kernel
void add_disk_cache();
private:
DiskCache* m_disk_cache { nullptr };
BAN::Vector<Partition*> m_partitions;
BAN::Optional<DiskCache> m_disk_cache;
BAN::Vector<Partition*> m_partitions;
friend class DiskCache;
};