https://git.reactos.org/?p=reactos.git;a=commitdiff;h=a1401a75772f489bb59c895b33e1f192ebde5fc8
commit a1401a75772f489bb59c895b33e1f192ebde5fc8 Author: Pierre Schweitzer <[email protected]> AuthorDate: Wed Oct 3 10:21:39 2018 +0200 Commit: Pierre Schweitzer <[email protected]> CommitDate: Wed Oct 3 10:22:33 2018 +0200 [NTOSKRNL] Use faster internal helper to query name This only applies if we're called from kernel mode with a synchronous file. --- ntoskrnl/include/internal/io.h | 10 ++++++++++ ntoskrnl/io/iomgr/file.c | 22 +++++++++++++++++----- 2 files changed, 27 insertions(+), 5 deletions(-) diff --git a/ntoskrnl/include/internal/io.h b/ntoskrnl/include/internal/io.h index 29ecb808f9..95e3607bb5 100644 --- a/ntoskrnl/include/internal/io.h +++ b/ntoskrnl/include/internal/io.h @@ -1276,6 +1276,16 @@ IoComputeDesiredAccessFileObject( IN PACCESS_MASK DesiredAccess ); +NTSTATUS +NTAPI +IopGetFileInformation( + IN PFILE_OBJECT FileObject, + IN ULONG Length, + IN FILE_INFORMATION_CLASS FileInfoClass, + OUT PVOID Buffer, + OUT PULONG ReturnedLength +); + // // I/O Timer Routines // diff --git a/ntoskrnl/io/iomgr/file.c b/ntoskrnl/io/iomgr/file.c index 4cbdb640a1..e877888c74 100644 --- a/ntoskrnl/io/iomgr/file.c +++ b/ntoskrnl/io/iomgr/file.c @@ -1941,11 +1941,23 @@ IopQueryNameInternal(IN PVOID ObjectBody, FIELD_OFFSET(FILE_NAME_INFORMATION, FileName); /* Query the File name */ - Status = IoQueryFileInformation(FileObject, - FileNameInformation, - LengthMismatch ? Length : FileLength, - LocalFileInfo, - &LocalReturnLength); + if (PreviousMode == KernelMode && + BooleanFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO)) + { + Status = IopGetFileInformation(FileObject, + LengthMismatch ? Length : FileLength, + FileNameInformation, + LocalFileInfo, + &LocalReturnLength); + } + else + { + Status = IoQueryFileInformation(FileObject, + FileNameInformation, + LengthMismatch ? Length : FileLength, + LocalFileInfo, + &LocalReturnLength); + } if (NT_ERROR(Status)) { /* Fail on errors only, allow warnings */
