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sys: improve support for FileStatLxInformation

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This commit is contained in:
Bill Zissimopoulos
2019-04-18 15:57:22 -07:00
parent a08fdccb17
commit 969651f5f6
4 changed files with 149 additions and 28 deletions
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115
src/sys/fileinfo.c
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@ -45,13 +45,13 @@ static NTSTATUS FspFsvolQueryPositionInformation(PFILE_OBJECT FileObject,
static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatInformation(PFILE_OBJECT FileObject,
static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatLxInformation(PFILE_OBJECT FileObject,
static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatLxInformationEa(
static NTSTATUS FspFsvolQueryStatLxEaInformation(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd);
static NTSTATUS FspFsvolQueryStreamInformationCopy(
@ -61,6 +61,9 @@ static NTSTATUS FspFsvolQueryStreamInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolQueryStreamInformationSuccess(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PACCESS_MASK PEffectiveAccess);
static NTSTATUS FspFsvolQueryInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
@ -106,12 +109,13 @@ FAST_IO_QUERY_OPEN FspFastIoQueryOpen;
#pragma alloc_text(PAGE, FspFsvolQueryNetworkOpenInformation)
#pragma alloc_text(PAGE, FspFsvolQueryPositionInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStandardInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxInformationEa)
#pragma alloc_text(PAGE, FspFsvolQueryStatBaseInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxBaseInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxEaInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformationCopy)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformationSuccess)
#pragma alloc_text(PAGE, FspFsvolQueryInformationEffectiveAccess)
#pragma alloc_text(PAGE, FspFsvolQueryInformation)
#pragma alloc_text(PAGE, FspFsvolQueryInformationComplete)
#pragma alloc_text(PAGE, FspFsvolQueryInformationRequestFini)
@ -429,7 +433,7 @@ static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatInformation(PFILE_OBJECT FileObject,
static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
@ -460,14 +464,13 @@ static NTSTATUS FspFsvolQueryStatInformation(PFILE_OBJECT FileObject,
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->ReparseTag = FileInfo->ReparseTag;
Info->NumberOfLinks = 1;
Info->EffectiveAccess = FileDesc->GrantedAccess;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatLxInformation(PFILE_OBJECT FileObject,
static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
@ -498,14 +501,13 @@ static NTSTATUS FspFsvolQueryStatLxInformation(PFILE_OBJECT FileObject,
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->ReparseTag = FileInfo->ReparseTag;
Info->NumberOfLinks = 1;
Info->EffectiveAccess = FileDesc->GrantedAccess;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatLxInformationEa(
static NTSTATUS FspFsvolQueryStatLxEaInformation(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd)
{
@ -532,14 +534,14 @@ static NTSTATUS FspFsvolQueryStatLxInformationEa(
union
{
FILE_GET_EA_INFORMATION V;
UINT8 B[256];
UINT8 B[64];
} GetEaBuf;
PFILE_GET_EA_INFORMATION GetEa = &GetEaBuf.V;
ULONG GetEaLength = 0;
union
{
FILE_FULL_EA_INFORMATION V;
UINT8 B[256];
UINT8 B[128];
} EaBuf;
ULONG EaLength = sizeof EaBuf;
STRING EaName, CmpName;
@ -847,6 +849,69 @@ static NTSTATUS FspFsvolQueryStreamInformationSuccess(
return Result;
}
static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PACCESS_MASK PEffectiveAccess)
{
union
{
SECURITY_DESCRIPTOR V;
UINT8 B[256];
} SecurityDescriptorBuf;
PSECURITY_DESCRIPTOR SecurityDescriptor = &SecurityDescriptorBuf.V;
ULONG Length;
SECURITY_SUBJECT_CONTEXT SecuritySubjectContext;
ACCESS_MASK EffectiveAccess;
NTSTATUS Result;
BOOLEAN AccessResult;
*PEffectiveAccess = 0;
Length = sizeof SecurityDescriptorBuf;
Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
SecurityDescriptor, &Length);
if (STATUS_BUFFER_OVERFLOW == Result)
{
SecurityDescriptor = FspAlloc(Length);
if (0 == SecurityDescriptor)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
SecurityDescriptor, &Length);
}
if (!NT_SUCCESS(Result))
goto exit;
SeCaptureSubjectContext(&SecuritySubjectContext);
AccessResult = SeAccessCheck(
SecurityDescriptor,
&SecuritySubjectContext,
FALSE,
MAXIMUM_ALLOWED,
0,
0,
IoGetFileObjectGenericMapping(),
UserMode,
&EffectiveAccess,
&Result);
if (!AccessResult)
goto exit;
*PEffectiveAccess = EffectiveAccess;
exit:
if (&SecurityDescriptorBuf.V != SecurityDescriptor && 0 != SecurityDescriptor)
FspFree(SecurityDescriptor);
return Result;
}
static NTSTATUS FspFsvolQueryInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -922,10 +987,10 @@ static NTSTATUS FspFsvolQueryInformation(
Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case 68/*FileStatInformation*/:
Result = FspFsvolQueryStatInformation(FileObject, &Buffer, BufferEnd, 0);
Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case 70/*FileStatLxInformation*/:
Result = FspFsvolQueryStatLxInformation(FileObject, &Buffer, BufferEnd, 0);
Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, 0);
break;
default:
Result = STATUS_INVALID_PARAMETER;
@ -937,15 +1002,23 @@ static NTSTATUS FspFsvolQueryInformation(
FspFileNodeAcquireShared(FileNode, Main);
if (70/*FileStatLxInformation*/ == FileInformationClass)
switch (FileInformationClass)
{
Result = FspFsvolQueryStatLxInformationEa(
case 68/*FileStatInformation*/:
FspFsvolQueryInformationEffectiveAccess(
FsvolDeviceObject, FileObject, &((FSP_FILE_STAT_INFORMATION *)Buffer)->EffectiveAccess);
break;
case 70/*FileStatLxInformation*/:
FspFsvolQueryInformationEffectiveAccess(
FsvolDeviceObject, FileObject, &((FSP_FILE_STAT_LX_INFORMATION *)Buffer)->EffectiveAccess);
Result = FspFsvolQueryStatLxEaInformation(
FsvolDeviceObject, FileObject, &Buffer, BufferEnd);
if (!NT_SUCCESS(Result))
{
FspFileNodeRelease(FileNode, Main);
return Result;
}
break;
}
if (FspFileNodeTryGetFileInfo(FileNode, &FileInfoBuf))
@ -975,10 +1048,10 @@ static NTSTATUS FspFsvolQueryInformation(
Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
break;
case 68/*FileStatInformation*/:
Result = FspFsvolQueryStatInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
break;
case 70/*FileStatLxInformation*/:
Result = FspFsvolQueryStatLxInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, &FileInfoBuf);
break;
default:
ASSERT(0);
@ -1091,10 +1164,10 @@ NTSTATUS FspFsvolQueryInformationComplete(
Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, FileInfo);
break;
case 68/*FileStatInformation*/:
Result = FspFsvolQueryStatInformation(FileObject, &Buffer, BufferEnd, FileInfo);
Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, FileInfo);
break;
case 70/*FileStatLxInformation*/:
Result = FspFsvolQueryStatLxInformation(FileObject, &Buffer, BufferEnd, FileInfo);
Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, FileInfo);
break;
default:
ASSERT(0);