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Only traverse recovery file's FAT table to fast the recovery performance.

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Signed-off-by: erictian
Reviewed-by: niruiyu

(based on FatPkg commit 6e68a62cf0c6b8ecad2bceff4e8d86ff08d1f041)

[jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Acked-by: Mark Doran <mark.doran@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Feng Tian 2011-11-22 03:01:14 +00:00 committed by Jordan Justen
parent 4d0e0c4510
commit 1d951a3086
2 changed files with 17 additions and 6 deletions
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10
FatPkg/FatPei/FatLiteAccess.c
View File

@ -1,7 +1,7 @@
/** @file
FAT file system access routines for FAT recovery PEIM
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
@ -315,7 +315,10 @@ FatSetFilePos (
}
File->CurrentPos += Pos;
//
// Calculate the amount of consecutive cluster occupied by the file.
// FatReadFile() will use it to read these blocks once.
//
File->StraightReadAmount = 0;
Cluster = File->CurrentCluster;
while (!FAT_CLUSTER_FUNCTIONAL (Cluster)) {
@ -517,9 +520,6 @@ FatReadNextDirectoryEntry (
SubFile->StartingCluster = SubFile->CurrentCluster;
SubFile->Volume = ParentDir->Volume;
if (SubFile->StartingCluster != 0) {
Status = FatSetFilePos (PrivateData, SubFile, 0);
}
//
// in Pei phase, time parameters do not need to be filled for minimum use.
//

13
FatPkg/FatPei/FatLiteApi.c
View File

@ -1,7 +1,7 @@
/** @file
FAT recovery PEIM entry point, Ppi Functions and FAT Api functions.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
@ -577,6 +577,7 @@ FindRecoveryFile (
//
// Construct root directory file
//
ZeroMem (&Parent, sizeof (PEI_FAT_FILE));
Parent.IsFixedRootDir = (BOOLEAN) ((PrivateData->Volume[VolumeIndex].FatType == Fat32) ? FALSE : TRUE);
Parent.Attributes = FAT_ATTR_DIRECTORY;
Parent.CurrentPos = 0;
@ -593,6 +594,9 @@ FindRecoveryFile (
//
Status = FatReadNextDirectoryEntry (PrivateData, &Parent, File);
while (Status == EFI_SUCCESS) {
//
// Compare whether the file name is recovery file name.
//
if (EngStriColl (PrivateData, FileName, File->FileName)) {
break;
}
@ -604,6 +608,13 @@ FindRecoveryFile (
return EFI_NOT_FOUND;
}
//
// Get the recovery file, set its file position to 0.
//
if (File->StartingCluster != 0) {
Status = FatSetFilePos (PrivateData, File, 0);
}
*Handle = File;
return EFI_SUCCESS;