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Replaced filesystem list spinlock by an executive resource.

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svn path=/trunk/; revision=4148
This commit is contained in:
Eric Kohl 2003-02-14 22:54:38 +00:00
parent 75e27edb71
commit e8f191a72e
1 changed files with 53 additions and 49 deletions
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102
reactos/ntoskrnl/io/fs.c
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@ -1,4 +1,4 @@
/* $Id: fs.c,v 1.29 2002/09/08 10:23:25 chorns Exp $
/* $Id: fs.c,v 1.30 2003/02/14 22:54:38 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -38,7 +38,7 @@ typedef struct _FS_CHANGE_NOTIFY_ENTRY
/* GLOBALS ******************************************************************/
static KSPIN_LOCK FileSystemListLock;
static ERESOURCE FileSystemListLock;
static LIST_ENTRY FileSystemListHead;
static KSPIN_LOCK FsChangeNotifyListLock;
@ -159,7 +159,7 @@ VOID
IoInitFileSystemImplementation(VOID)
{
InitializeListHead(&FileSystemListHead);
KeInitializeSpinLock(&FileSystemListLock);
ExInitializeResourceLite(&FileSystemListLock);
InitializeListHead(&FsChangeNotifyListHead);
KeInitializeSpinLock(&FsChangeNotifyListLock);
@ -169,43 +169,48 @@ IoInitFileSystemImplementation(VOID)
VOID
IoShutdownRegisteredFileSystems(VOID)
{
KIRQL oldlvl;
PLIST_ENTRY current_entry;
FILE_SYSTEM_OBJECT* current;
PIRP Irp;
KEVENT Event;
IO_STATUS_BLOCK IoStatusBlock;
NTSTATUS Status;
PLIST_ENTRY current_entry;
FILE_SYSTEM_OBJECT* current;
PIRP Irp;
KEVENT Event;
IO_STATUS_BLOCK IoStatusBlock;
NTSTATUS Status;
DPRINT("IoShutdownRegisteredFileSystems()\n");
DPRINT("IoShutdownRegisteredFileSystems()\n");
KeAcquireSpinLock(&FileSystemListLock,&oldlvl);
KeInitializeEvent(&Event,NotificationEvent,FALSE);
ExAcquireResourceSharedLite(&FileSystemListLock,TRUE);
KeInitializeEvent(&Event,
NotificationEvent,
FALSE);
current_entry = FileSystemListHead.Flink;
while (current_entry!=(&FileSystemListHead))
{
current = CONTAINING_RECORD(current_entry,FILE_SYSTEM_OBJECT,Entry);
current_entry = FileSystemListHead.Flink;
while (current_entry!=(&FileSystemListHead))
{
current = CONTAINING_RECORD(current_entry,FILE_SYSTEM_OBJECT,Entry);
/* send IRP_MJ_SHUTDOWN */
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_SHUTDOWN,
current->DeviceObject,
NULL,
0,
0,
&Event,
&IoStatusBlock);
/* send IRP_MJ_SHUTDOWN */
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_SHUTDOWN,
current->DeviceObject,
NULL,
0,
0,
&Event,
&IoStatusBlock);
Status = IoCallDriver(current->DeviceObject,Irp);
if (Status==STATUS_PENDING)
{
KeWaitForSingleObject(&Event,Executive,KernelMode,FALSE,NULL);
}
Status = IoCallDriver(current->DeviceObject,Irp);
if (Status == STATUS_PENDING)
{
KeWaitForSingleObject(&Event,
Executive,
KernelMode,
FALSE,
NULL);
}
current_entry = current_entry->Flink;
}
current_entry = current_entry->Flink;
}
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
ExReleaseResourceLite(&FileSystemListLock);
}
@ -330,7 +335,6 @@ IoMountVolume(IN PDEVICE_OBJECT DeviceObject,
* RETURNS: Status
*/
{
KIRQL oldlvl;
PLIST_ENTRY current_entry;
FILE_SYSTEM_OBJECT* current;
NTSTATUS Status;
@ -366,7 +370,7 @@ IoMountVolume(IN PDEVICE_OBJECT DeviceObject,
return(STATUS_UNRECOGNIZED_VOLUME);
}
KeAcquireSpinLock(&FileSystemListLock,&oldlvl);
ExAcquireResourceSharedLite(&FileSystemListLock,TRUE);
current_entry = FileSystemListHead.Flink;
while (current_entry!=(&FileSystemListHead))
{
@ -376,27 +380,24 @@ IoMountVolume(IN PDEVICE_OBJECT DeviceObject,
current_entry = current_entry->Flink;
continue;
}
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
Status = IopMountFileSystem(current->DeviceObject,
DeviceObject);
KeAcquireSpinLock(&FileSystemListLock,&oldlvl);
switch (Status)
{
case STATUS_FS_DRIVER_REQUIRED:
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
Status = IopLoadFileSystem(current->DeviceObject);
if (!NT_SUCCESS(Status))
{
return(Status);
ExReleaseResourceLite(&FileSystemListLock);
return(Status);
}
KeAcquireSpinLock(&FileSystemListLock,&oldlvl);
current_entry = FileSystemListHead.Flink;
continue;
case STATUS_SUCCESS:
DeviceObject->Vpb->Flags = DeviceObject->Vpb->Flags |
VPB_MOUNTED;
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
ExReleaseResourceLite(&FileSystemListLock);
return(STATUS_SUCCESS);
case STATUS_UNRECOGNIZED_VOLUME:
@ -404,7 +405,7 @@ IoMountVolume(IN PDEVICE_OBJECT DeviceObject,
current_entry = current_entry->Flink;
}
}
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
ExReleaseResourceLite(&FileSystemListLock);
return(STATUS_UNRECOGNIZED_VOLUME);
}
@ -565,9 +566,13 @@ IoRegisterFileSystem(IN PDEVICE_OBJECT DeviceObject)
assert(Fs!=NULL);
Fs->DeviceObject = DeviceObject;
ExInterlockedInsertTailList(&FileSystemListHead,
&Fs->Entry,
&FileSystemListLock);
ExAcquireResourceExclusiveLite(&FileSystemListLock, TRUE);
InsertTailList(&FileSystemListHead,
&Fs->Entry);
ExReleaseResourceLite(&FileSystemListLock);
IopNotifyFileSystemChange(DeviceObject,
TRUE);
}
@ -576,13 +581,12 @@ IoRegisterFileSystem(IN PDEVICE_OBJECT DeviceObject)
VOID STDCALL
IoUnregisterFileSystem(IN PDEVICE_OBJECT DeviceObject)
{
KIRQL oldlvl;
PLIST_ENTRY current_entry;
PFILE_SYSTEM_OBJECT current;
DPRINT("IoUnregisterFileSystem(DeviceObject %x)\n",DeviceObject);
KeAcquireSpinLock(&FileSystemListLock,&oldlvl);
ExAcquireResourceExclusiveLite(&FileSystemListLock, TRUE);
current_entry = FileSystemListHead.Flink;
while (current_entry!=(&FileSystemListHead))
{
@ -591,13 +595,13 @@ IoUnregisterFileSystem(IN PDEVICE_OBJECT DeviceObject)
{
RemoveEntryList(current_entry);
ExFreePool(current);
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
ExReleaseResourceLite(&FileSystemListLock);
IopNotifyFileSystemChange(DeviceObject, FALSE);
return;
}
current_entry = current_entry->Flink;
}
KeReleaseSpinLock(&FileSystemListLock,oldlvl);
ExReleaseResourceLite(&FileSystemListLock);
}