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Kernel: Rewrite and optimize DiskCache

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DiskCache now consists of PageCaches which are caches of contiguous
sectors. This allows the disk cache to be ordered and faster traversal.

We seem to have a problem somewhere during reading. The stack gets
corrupted.
This commit is contained in:
Bananymous
2023-06-19 10:31:47 +03:00
parent 328d67f551
commit 7d254c26bc
2 changed files with 142 additions and 137 deletions
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18
kernel/include/kernel/Storage/DiskCache.h
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@@ -18,30 +18,28 @@ namespace Kernel
BAN::ErrorOr<void> read_sector(uint64_t sector, uint8_t* buffer);
BAN::ErrorOr<void> write_sector(uint64_t sector, const uint8_t* buffer);
void sync();
size_t release_clean_pages(size_t);
size_t release_pages(size_t);
void release_all_pages();
private:
struct SectorCache
{
uint64_t sector { 0 };
bool dirty { false };
};
struct CacheBlock
struct PageCache
{
paddr_t paddr { 0 };
BAN::Array<SectorCache, 4> sectors;
uint64_t first_sector { 0 };
uint8_t sector_mask { 0 };
uint8_t dirty_mask { 0 };
void sync(StorageDevice&);
void read_sector(StorageDevice&, size_t, uint8_t*);
void write_sector(StorageDevice&, size_t, const uint8_t*);
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<CacheBlock> m_cache;
BAN::Vector<PageCache> m_cache;
};
}