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fsctl: FSP_FSCTL_TRANSACT_REQ: add Req.QueryDirectory.Pattern

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This commit is contained in:
Bill Zissimopoulos
2016-04-21 11:49:11 -07:00
parent f1693af6a3
commit 1bf28bdfa4
5 changed files with 24 additions and 8 deletions
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23
src/sys/dirctl.c
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@ -398,13 +398,6 @@ static NTSTATUS FspFsvolQueryDirectoryRetry(
* - If the requsted DirectoryPattern is the MatchAll pattern then we set
* the SystemBufferLength to the requested (IRP) length as it is actually
* counter-productive to try to read more than we need.
*
* Note that we have made the decision not to forward the directory pattern
* to user mode and instead do all pattern matching in kernel mode. The
* primary reason for this decision was considerations about the DirInfo meta
* cache. If it is determined that this was a bad decision in the future,
* we can always start sending the directory pattern to user mode under some
* circumstances (e.g. when doing non-cached reads).
*/
#define GetSystemBufferLengthMaybeCached()\
(0 != FsvolDeviceExtension->VolumeParams.FileInfoTimeout && 0 == FileDesc->DirectoryOffset) ||\
@ -534,7 +527,10 @@ static NTSTATUS FspFsvolQueryDirectoryRetry(
}
/* create request */
Result = FspIopCreateRequestEx(Irp, 0, 0, FspFsvolQueryDirectoryRequestFini, &Request);
Result = FspIopCreateRequestEx(Irp, 0,
FspFileDescDirectoryPatternMatchAll != FileDesc->DirectoryPattern.Buffer ?
FileDesc->DirectoryPattern.Length + sizeof(WCHAR) : 0,
FspFsvolQueryDirectoryRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileNodeRelease(FileNode, Full);
@ -547,6 +543,17 @@ static NTSTATUS FspFsvolQueryDirectoryRetry(
Request->Req.QueryDirectory.Offset = FileDesc->DirectoryOffset;
Request->Req.QueryDirectory.Length = SystemBufferLength;
if (FspFileDescDirectoryPatternMatchAll != FileDesc->DirectoryPattern.Buffer)
{
Request->Req.QueryDirectory.Pattern.Offset = Request->FileName.Size;
Request->Req.QueryDirectory.Pattern.Size =
FileDesc->DirectoryPattern.Length + sizeof(WCHAR);
RtlCopyMemory(Request->Buffer + Request->FileName.Size,
FileDesc->DirectoryPattern.Buffer, FileDesc->DirectoryPattern.Length);
*(PWSTR)(Request->Buffer + Request->FileName.Size + FileDesc->DirectoryPattern.Length) =
L'\0';
}
FspFileNodeSetOwner(FileNode, Full, Request);
FspIopRequestContext(Request, RequestFileNode) = FileNode;