sys: fast I/O and resource acquisition callbacks

2025-07-03 09:22:57 -05:00 · 2016-02-23 22:39:15 -08:00
parent f87eeb9db5
commit e040c4d3cf
5 changed files with 77 additions and 14 deletions
--- a/src/sys/callbacks.c
+++ b/src/sys/callbacks.c
@ -0,0 +1,158 @@
+/**
+ * @file sys/callbacks.c
+ * Fast I/O and resource acquisition callbacks.
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <sys/driver.h>
+
+FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
+FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
+FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
+FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
+FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
+FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
+FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
+BOOLEAN FspAcquireForLazyWrite(
+    PVOID Context,
+    BOOLEAN Wait);
+VOID FspReleaseFromLazyWrite(
+    PVOID Context);
+BOOLEAN FspAcquireForReadAhead(
+    PVOID Context,
+    BOOLEAN Wait);
+VOID FspReleaseFromReadAhead(
+    PVOID Context);
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, FspFastIoCheckIfPossible)
+#pragma alloc_text(PAGE, FspAcquireFileForNtCreateSection)
+#pragma alloc_text(PAGE, FspReleaseFileForNtCreateSection)
+#pragma alloc_text(PAGE, FspAcquireForModWrite)
+#pragma alloc_text(PAGE, FspReleaseForModWrite)
+#pragma alloc_text(PAGE, FspAcquireForCcFlush)
+#pragma alloc_text(PAGE, FspReleaseForCcFlush)
+#pragma alloc_text(PAGE, FspAcquireForLazyWrite)
+#pragma alloc_text(PAGE, FspReleaseFromLazyWrite)
+#pragma alloc_text(PAGE, FspAcquireForReadAhead)
+#pragma alloc_text(PAGE, FspReleaseFromReadAhead)
+#endif
+
+BOOLEAN FspFastIoCheckIfPossible(
+    PFILE_OBJECT FileObject,
+    PLARGE_INTEGER FileOffset,
+    ULONG Length,
+    BOOLEAN Wait,
+    ULONG LockKey,
+    BOOLEAN CheckForReadOperation,
+    PIO_STATUS_BLOCK IoStatus,
+    PDEVICE_OBJECT DeviceObject)
+{
+    FSP_ENTER_BOOL(PAGED_CODE());
+
+    Result = FALSE;
+
+    FSP_LEAVE_BOOL("FileObject=%p", FileObject);
+}
+
+VOID FspAcquireFileForNtCreateSection(
+    PFILE_OBJECT FileObject)
+{
+    FSP_ENTER_VOID(PAGED_CODE());
+
+    FSP_LEAVE_VOID("FileObject=%p", FileObject);
+}
+
+VOID FspReleaseFileForNtCreateSection(
+    PFILE_OBJECT FileObject)
+{
+    FSP_ENTER_VOID(PAGED_CODE());
+
+    FSP_LEAVE_VOID("FileObject=%p", FileObject);
+}
+
+NTSTATUS FspAcquireForModWrite(
+    PFILE_OBJECT FileObject,
+    PLARGE_INTEGER EndingOffset,
+    PERESOURCE *ResourceToRelease,
+    PDEVICE_OBJECT DeviceObject)
+{
+    FSP_ENTER(PAGED_CODE());
+
+    Result = STATUS_NOT_IMPLEMENTED;
+
+    FSP_LEAVE("FileObject=%p", FileObject);
+}
+
+NTSTATUS FspReleaseForModWrite(
+    PFILE_OBJECT FileObject,
+    PERESOURCE ResourceToRelease,
+    PDEVICE_OBJECT DeviceObject)
+{
+    FSP_ENTER(PAGED_CODE());
+
+    Result = STATUS_NOT_IMPLEMENTED;
+
+    FSP_LEAVE("FileObject=%p", FileObject);
+}
+
+NTSTATUS FspAcquireForCcFlush(
+    PFILE_OBJECT FileObject,
+    PDEVICE_OBJECT DeviceObject)
+{
+    FSP_ENTER(PAGED_CODE());
+
+    Result = STATUS_NOT_IMPLEMENTED;
+
+    FSP_LEAVE("FileObject=%p", FileObject);
+}
+
+NTSTATUS FspReleaseForCcFlush(
+    PFILE_OBJECT FileObject,
+    PDEVICE_OBJECT DeviceObject)
+{
+    FSP_ENTER(PAGED_CODE());
+
+    Result = STATUS_NOT_IMPLEMENTED;
+
+    FSP_LEAVE("FileObject=%p", FileObject);
+}
+
+BOOLEAN FspAcquireForLazyWrite(
+    PVOID Context,
+    BOOLEAN Wait)
+{
+    FSP_ENTER_BOOL(PAGED_CODE());
+
+    Result = FALSE;
+
+    FSP_LEAVE_BOOL("Context=%p, Wait=%d", Context, Wait);
+}
+
+VOID FspReleaseFromLazyWrite(
+    PVOID Context)
+{
+    FSP_ENTER_VOID(PAGED_CODE());
+
+    FSP_LEAVE_VOID("Context=%p", Context);
+}
+
+BOOLEAN FspAcquireForReadAhead(
+    PVOID Context,
+    BOOLEAN Wait)
+{
+    FSP_ENTER_BOOL(PAGED_CODE());
+
+    Result = FALSE;
+
+    FSP_LEAVE_BOOL("Context=%p, Wait=%d", Context, Wait);
+}
+
+VOID FspReleaseFromReadAhead(
+    PVOID Context)
+{
+    FSP_ENTER_VOID(PAGED_CODE());
+
+    FSP_LEAVE_VOID("Context=%p", Context);
+}