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sys: FSP_META_CACHE: initial implementation

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Bill Zissimopoulos
2016-02-17 16:55:14 -08:00
parent 93fb3a9934
commit 0abd173898
4 changed files with 268 additions and 0 deletions
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23
src/sys/driver.h
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@ -384,6 +384,29 @@ PIRP FspIoqEndProcessingIrp(FSP_IOQ *Ioq, UINT_PTR IrpHint);
BOOLEAN FspIoqRetryCompleteIrp(FSP_IOQ *Ioq, PIRP Irp, NTSTATUS *PResult);
PIRP FspIoqNextCompleteIrp(FSP_IOQ *Ioq, PIRP BoundaryIrp);
/* meta cache */
typedef struct
{
KSPIN_LOCK SpinLock;
UINT64 MetaTimeout;
ULONG MetaCapacity, ItemCount;
ULONG ItemSizeMax;
UINT64 ItemIndex;
LIST_ENTRY ItemList;
ULONG ItemBucketCount;
PVOID ItemBuckets[];
} FSP_META_CACHE;
NTSTATUS MetaCacheCreate(
ULONG MetaCapacity, ULONG ItemSizeMax, PLARGE_INTEGER MetaTimeout,
FSP_META_CACHE **PMetaCache);
VOID MetaCacheDelete(FSP_META_CACHE *MetaCache);
VOID MetaCacheInvalidateAll(FSP_META_CACHE *MetaCache);
VOID MetaCacheInvalidateExpired(FSP_META_CACHE *MetaCache);
PVOID MetaCacheReferenceItemBuffer(FSP_META_CACHE *MetaCache, UINT64 ItemIndex, PULONG PSize);
VOID MetaCacheDereferenceItemBuffer(PVOID Buffer);
UINT64 MetaCacheAddItem(FSP_META_CACHE *MetaCache, PVOID Buffer, ULONG Size);
VOID MetaCacheInvalidateItem(FSP_META_CACHE *MetaCache, UINT64 ItemIndex);
/* I/O processing */
#define FSP_FSCTL_WORK \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'W', METHOD_NEITHER, FILE_ANY_ACCESS)