diff options
Diffstat (limited to 'FatPkg/EnhancedFatDxe/FileSpace.c')
| -rw-r--r-- | FatPkg/EnhancedFatDxe/FileSpace.c | 281 |
1 files changed, 142 insertions, 139 deletions
diff --git a/FatPkg/EnhancedFatDxe/FileSpace.c b/FatPkg/EnhancedFatDxe/FileSpace.c index 7dd220f837..909d4980d2 100644 --- a/FatPkg/EnhancedFatDxe/FileSpace.c +++ b/FatPkg/EnhancedFatDxe/FileSpace.c @@ -10,7 +10,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include "Fat.h"
-
/**
Get the FAT entry of the volume, which is identified with the Index.
@@ -24,46 +23,48 @@ SPDX-License-Identifier: BSD-2-Clause-Patent STATIC
VOID *
FatLoadFatEntry (
- IN FAT_VOLUME *Volume,
- IN UINTN Index
+ IN FAT_VOLUME *Volume,
+ IN UINTN Index
)
{
UINTN Pos;
EFI_STATUS Status;
if (Index > (Volume->MaxCluster + 1)) {
- Volume->FatEntryBuffer = (UINT32) -1;
+ Volume->FatEntryBuffer = (UINT32)-1;
return &Volume->FatEntryBuffer;
}
+
//
// Compute buffer position needed
//
switch (Volume->FatType) {
- case Fat12:
- Pos = FAT_POS_FAT12 (Index);
- break;
+ case Fat12:
+ Pos = FAT_POS_FAT12 (Index);
+ break;
- case Fat16:
- Pos = FAT_POS_FAT16 (Index);
- break;
+ case Fat16:
+ Pos = FAT_POS_FAT16 (Index);
+ break;
- default:
- Pos = FAT_POS_FAT32 (Index);
+ default:
+ Pos = FAT_POS_FAT32 (Index);
}
+
//
// Set the position and read the buffer
//
Volume->FatEntryPos = Volume->FatPos + Pos;
- Status = FatDiskIo (
- Volume,
- ReadFat,
- Volume->FatEntryPos,
- Volume->FatEntrySize,
- &Volume->FatEntryBuffer,
- NULL
- );
+ Status = FatDiskIo (
+ Volume,
+ ReadFat,
+ Volume->FatEntryPos,
+ Volume->FatEntrySize,
+ &Volume->FatEntryBuffer,
+ NULL
+ );
if (EFI_ERROR (Status)) {
- Volume->FatEntryBuffer = (UINT32) -1;
+ Volume->FatEntryBuffer = (UINT32)-1;
}
return &Volume->FatEntryBuffer;
@@ -82,8 +83,8 @@ FatLoadFatEntry ( STATIC
UINTN
FatGetFatEntry (
- IN FAT_VOLUME *Volume,
- IN UINTN Index
+ IN FAT_VOLUME *Volume,
+ IN UINTN Index
)
{
VOID *Pos;
@@ -95,27 +96,27 @@ FatGetFatEntry ( Pos = FatLoadFatEntry (Volume, Index);
if (Index > (Volume->MaxCluster + 1)) {
- return (UINTN) -1;
+ return (UINTN)-1;
}
switch (Volume->FatType) {
- case Fat12:
- En12 = Pos;
- Accum = En12[0] | (En12[1] << 8);
- Accum = FAT_ODD_CLUSTER_FAT12 (Index) ? (Accum >> 4) : (Accum & FAT_CLUSTER_MASK_FAT12);
- Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT12) ? FAT_CLUSTER_SPECIAL_EXT : 0);
- break;
-
- case Fat16:
- En16 = Pos;
- Accum = *En16;
- Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT16) ? FAT_CLUSTER_SPECIAL_EXT : 0);
- break;
-
- default:
- En32 = Pos;
- Accum = *En32 & FAT_CLUSTER_MASK_FAT32;
- Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT32) ? FAT_CLUSTER_SPECIAL_EXT : 0);
+ case Fat12:
+ En12 = Pos;
+ Accum = En12[0] | (En12[1] << 8);
+ Accum = FAT_ODD_CLUSTER_FAT12 (Index) ? (Accum >> 4) : (Accum & FAT_CLUSTER_MASK_FAT12);
+ Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT12) ? FAT_CLUSTER_SPECIAL_EXT : 0);
+ break;
+
+ case Fat16:
+ En16 = Pos;
+ Accum = *En16;
+ Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT16) ? FAT_CLUSTER_SPECIAL_EXT : 0);
+ break;
+
+ default:
+ En32 = Pos;
+ Accum = *En32 & FAT_CLUSTER_MASK_FAT32;
+ Accum = Accum | ((Accum >= FAT_CLUSTER_SPECIAL_FAT32) ? FAT_CLUSTER_SPECIAL_EXT : 0);
}
return Accum;
@@ -137,9 +138,9 @@ FatGetFatEntry ( STATIC
EFI_STATUS
FatSetFatEntry (
- IN FAT_VOLUME *Volume,
- IN UINTN Index,
- IN UINTN Value
+ IN FAT_VOLUME *Volume,
+ IN UINTN Index,
+ IN UINTN Value
)
{
VOID *Pos;
@@ -155,16 +156,17 @@ FatSetFatEntry ( }
OriginalVal = FatGetFatEntry (Volume, Index);
- if (Value == FAT_CLUSTER_FREE && OriginalVal != FAT_CLUSTER_FREE) {
+ if ((Value == FAT_CLUSTER_FREE) && (OriginalVal != FAT_CLUSTER_FREE)) {
Volume->FatInfoSector.FreeInfo.ClusterCount += 1;
if (Index < Volume->FatInfoSector.FreeInfo.NextCluster) {
- Volume->FatInfoSector.FreeInfo.NextCluster = (UINT32) Index;
+ Volume->FatInfoSector.FreeInfo.NextCluster = (UINT32)Index;
}
- } else if (Value != FAT_CLUSTER_FREE && OriginalVal == FAT_CLUSTER_FREE) {
+ } else if ((Value != FAT_CLUSTER_FREE) && (OriginalVal == FAT_CLUSTER_FREE)) {
if (Volume->FatInfoSector.FreeInfo.ClusterCount != 0) {
Volume->FatInfoSector.FreeInfo.ClusterCount -= 1;
}
}
+
//
// Make sure the entry is in memory
//
@@ -174,37 +176,39 @@ FatSetFatEntry ( // Update the value
//
switch (Volume->FatType) {
- case Fat12:
- En12 = Pos;
- Accum = En12[0] | (En12[1] << 8);
- Value = Value & FAT_CLUSTER_MASK_FAT12;
-
- if (FAT_ODD_CLUSTER_FAT12 (Index)) {
- Accum = (Value << 4) | (Accum & 0xF);
- } else {
- Accum = Value | (Accum & FAT_CLUSTER_UNMASK_FAT12);
- }
+ case Fat12:
+ En12 = Pos;
+ Accum = En12[0] | (En12[1] << 8);
+ Value = Value & FAT_CLUSTER_MASK_FAT12;
- En12[0] = (UINT8) (Accum & 0xFF);
- En12[1] = (UINT8) (Accum >> 8);
- break;
+ if (FAT_ODD_CLUSTER_FAT12 (Index)) {
+ Accum = (Value << 4) | (Accum & 0xF);
+ } else {
+ Accum = Value | (Accum & FAT_CLUSTER_UNMASK_FAT12);
+ }
- case Fat16:
- En16 = Pos;
- *En16 = (UINT16) Value;
- break;
+ En12[0] = (UINT8)(Accum & 0xFF);
+ En12[1] = (UINT8)(Accum >> 8);
+ break;
+
+ case Fat16:
+ En16 = Pos;
+ *En16 = (UINT16)Value;
+ break;
- default:
- En32 = Pos;
- *En32 = (*En32 & FAT_CLUSTER_UNMASK_FAT32) | (UINT32) (Value & FAT_CLUSTER_MASK_FAT32);
+ default:
+ En32 = Pos;
+ *En32 = (*En32 & FAT_CLUSTER_UNMASK_FAT32) | (UINT32)(Value & FAT_CLUSTER_MASK_FAT32);
}
+
//
// If the volume's dirty bit is not set, set it now
//
- if (!Volume->FatDirty && Volume->FatType != Fat12) {
+ if (!Volume->FatDirty && (Volume->FatType != Fat12)) {
Volume->FatDirty = TRUE;
FatAccessVolumeDirty (Volume, WriteFat, &Volume->DirtyValue);
}
+
//
// Write the updated fat entry value to the volume
// The fat is the first fat, and other fat will be in sync
@@ -235,15 +239,14 @@ FatSetFatEntry ( STATIC
EFI_STATUS
FatFreeClusters (
- IN FAT_VOLUME *Volume,
- IN UINTN Cluster
+ IN FAT_VOLUME *Volume,
+ IN UINTN Cluster
)
{
- UINTN LastCluster;
+ UINTN LastCluster;
while (!FAT_END_OF_FAT_CHAIN (Cluster)) {
- if (Cluster == FAT_CLUSTER_FREE || Cluster >= FAT_CLUSTER_SPECIAL) {
-
+ if ((Cluster == FAT_CLUSTER_FREE) || (Cluster >= FAT_CLUSTER_SPECIAL)) {
DEBUG ((DEBUG_INIT | DEBUG_ERROR, "FatShrinkEof: cluster chain corrupt\n"));
return EFI_VOLUME_CORRUPTED;
}
@@ -268,30 +271,30 @@ FatFreeClusters ( STATIC
UINTN
FatAllocateCluster (
- IN FAT_VOLUME *Volume
+ IN FAT_VOLUME *Volume
)
{
- UINTN Cluster;
+ UINTN Cluster;
//
// Start looking at FatFreePos for the next unallocated cluster
//
if (Volume->DiskError) {
- return (UINTN) FAT_CLUSTER_LAST;
+ return (UINTN)FAT_CLUSTER_LAST;
}
- for (;;) {
+ for ( ; ;) {
//
// If the end of the list, return no available cluster
//
if (Volume->FatInfoSector.FreeInfo.NextCluster > (Volume->MaxCluster + 1)) {
- if (Volume->FreeInfoValid && 0 < (INT32) (Volume->FatInfoSector.FreeInfo.ClusterCount)) {
+ if (Volume->FreeInfoValid && (0 < (INT32)(Volume->FatInfoSector.FreeInfo.ClusterCount))) {
Volume->FreeInfoValid = FALSE;
}
FatComputeFreeInfo (Volume);
if (Volume->FatInfoSector.FreeInfo.NextCluster > (Volume->MaxCluster + 1)) {
- return (UINTN) FAT_CLUSTER_LAST;
+ return (UINTN)FAT_CLUSTER_LAST;
}
}
@@ -299,13 +302,14 @@ FatAllocateCluster ( if (Cluster == FAT_CLUSTER_FREE) {
break;
}
+
//
// Try the next cluster
//
Volume->FatInfoSector.FreeInfo.NextCluster += 1;
}
- Cluster = Volume->FatInfoSector.FreeInfo.NextCluster;
+ Cluster = Volume->FatInfoSector.FreeInfo.NextCluster;
Volume->FatInfoSector.FreeInfo.NextCluster += 1;
return Cluster;
}
@@ -323,11 +327,11 @@ FatAllocateCluster ( STATIC
UINTN
FatSizeToClusters (
- IN FAT_VOLUME *Volume,
- IN UINTN Size
+ IN FAT_VOLUME *Volume,
+ IN UINTN Size
)
{
- UINTN Clusters;
+ UINTN Clusters;
Clusters = Size >> Volume->ClusterAlignment;
if ((Size & (Volume->ClusterSize - 1)) > 0) {
@@ -349,7 +353,7 @@ FatSizeToClusters ( **/
EFI_STATUS
FatShrinkEof (
- IN FAT_OFILE *OFile
+ IN FAT_OFILE *OFile
)
{
FAT_VOLUME *Volume;
@@ -358,7 +362,7 @@ FatShrinkEof ( UINTN Cluster;
UINTN LastCluster;
- Volume = OFile->Volume;
+ Volume = OFile->Volume;
ASSERT_VOLUME_LOCKED (Volume);
NewSize = FatSizeToClusters (Volume, OFile->FileSize);
@@ -370,10 +374,8 @@ FatShrinkEof ( LastCluster = FAT_CLUSTER_FREE;
if (NewSize != 0) {
-
for (CurSize = 0; CurSize < NewSize; CurSize++) {
- if (Cluster == FAT_CLUSTER_FREE || Cluster >= FAT_CLUSTER_SPECIAL) {
-
+ if ((Cluster == FAT_CLUSTER_FREE) || (Cluster >= FAT_CLUSTER_SPECIAL)) {
DEBUG ((DEBUG_INIT | DEBUG_ERROR, "FatShrinkEof: cluster chain corrupt\n"));
return EFI_VOLUME_CORRUPTED;
}
@@ -382,8 +384,7 @@ FatShrinkEof ( Cluster = FatGetFatEntry (Volume, Cluster);
}
- FatSetFatEntry (Volume, LastCluster, (UINTN) FAT_CLUSTER_LAST);
-
+ FatSetFatEntry (Volume, LastCluster, (UINTN)FAT_CLUSTER_LAST);
} else {
//
// Check to see if the file is already completely truncated
@@ -391,11 +392,13 @@ FatShrinkEof ( if (Cluster == FAT_CLUSTER_FREE) {
return EFI_SUCCESS;
}
+
//
// The file is being completely truncated.
//
- OFile->FileCluster = FAT_CLUSTER_FREE;
+ OFile->FileCluster = FAT_CLUSTER_FREE;
}
+
//
// Set CurrentCluster == FileCluster
// to force a recalculation of Position related stuffs
@@ -424,8 +427,8 @@ FatShrinkEof ( **/
EFI_STATUS
FatGrowEof (
- IN FAT_OFILE *OFile,
- IN UINT64 NewSizeInBytes
+ IN FAT_OFILE *OFile,
+ IN UINT64 NewSizeInBytes
)
{
FAT_VOLUME *Volume;
@@ -450,42 +453,41 @@ FatGrowEof ( // If the file is already large enough, do nothing
//
CurSize = FatSizeToClusters (Volume, OFile->FileSize);
- NewSize = FatSizeToClusters (Volume, (UINTN) NewSizeInBytes);
+ NewSize = FatSizeToClusters (Volume, (UINTN)NewSizeInBytes);
if (CurSize < NewSize) {
//
// If we haven't found the files last cluster do it now
//
if ((OFile->FileCluster != 0) && (OFile->FileLastCluster == 0)) {
- Cluster = OFile->FileCluster;
- ClusterCount = 0;
+ Cluster = OFile->FileCluster;
+ ClusterCount = 0;
while (!FAT_END_OF_FAT_CHAIN (Cluster)) {
- if (Cluster < FAT_MIN_CLUSTER || Cluster > Volume->MaxCluster + 1) {
-
+ if ((Cluster < FAT_MIN_CLUSTER) || (Cluster > Volume->MaxCluster + 1)) {
DEBUG (
(DEBUG_INIT | DEBUG_ERROR,
- "FatGrowEof: cluster chain corrupt\n")
+ "FatGrowEof: cluster chain corrupt\n")
);
Status = EFI_VOLUME_CORRUPTED;
goto Done;
}
ClusterCount++;
- OFile->FileLastCluster = Cluster;
- Cluster = FatGetFatEntry (Volume, Cluster);
+ OFile->FileLastCluster = Cluster;
+ Cluster = FatGetFatEntry (Volume, Cluster);
}
if (ClusterCount != CurSize) {
DEBUG (
(DEBUG_INIT | DEBUG_ERROR,
- "FatGrowEof: cluster chain size does not match file size\n")
+ "FatGrowEof: cluster chain size does not match file size\n")
);
Status = EFI_VOLUME_CORRUPTED;
goto Done;
}
-
}
+
//
// Loop until we've allocated enough space
//
@@ -495,7 +497,7 @@ FatGrowEof ( NewCluster = FatAllocateCluster (Volume);
if (FAT_END_OF_FAT_CHAIN (NewCluster)) {
if (LastCluster != FAT_CLUSTER_FREE) {
- FatSetFatEntry (Volume, LastCluster, (UINTN) FAT_CLUSTER_LAST);
+ FatSetFatEntry (Volume, LastCluster, (UINTN)FAT_CLUSTER_LAST);
OFile->FileLastCluster = LastCluster;
}
@@ -503,7 +505,7 @@ FatGrowEof ( goto Done;
}
- if (NewCluster < FAT_MIN_CLUSTER || NewCluster > Volume->MaxCluster + 1) {
+ if ((NewCluster < FAT_MIN_CLUSTER) || (NewCluster > Volume->MaxCluster + 1)) {
Status = EFI_VOLUME_CORRUPTED;
goto Done;
}
@@ -516,7 +518,7 @@ FatGrowEof ( }
LastCluster = NewCluster;
- CurSize += 1;
+ CurSize += 1;
//
// Terminate the cluster list
@@ -529,12 +531,12 @@ FatGrowEof ( // a second time. There are other, less predictable scenarios
// where this could happen, as well.
//
- FatSetFatEntry (Volume, LastCluster, (UINTN) FAT_CLUSTER_LAST);
+ FatSetFatEntry (Volume, LastCluster, (UINTN)FAT_CLUSTER_LAST);
OFile->FileLastCluster = LastCluster;
}
}
- OFile->FileSize = (UINTN) NewSizeInBytes;
+ OFile->FileSize = (UINTN)NewSizeInBytes;
OFile->Dirty = TRUE;
return EFI_SUCCESS;
@@ -558,9 +560,9 @@ Done: **/
EFI_STATUS
FatOFilePosition (
- IN FAT_OFILE *OFile,
- IN UINTN Position,
- IN UINTN PosLimit
+ IN FAT_OFILE *OFile,
+ IN UINTN Position,
+ IN UINTN PosLimit
)
{
FAT_VOLUME *Volume;
@@ -579,8 +581,8 @@ FatOFilePosition ( // from its fixed info in the fat bpb
//
if (OFile->IsFixedRootDir) {
- OFile->PosDisk = Volume->RootPos + Position;
- Run = OFile->FileSize - Position;
+ OFile->PosDisk = Volume->RootPos + Position;
+ Run = OFile->FileSize - Position;
} else {
//
// Run the file's cluster chain to find the current position
@@ -594,30 +596,30 @@ FatOFilePosition ( // when OFile->FileCluster is updated, so make a check of this
// and invalidate the original OFile->Position in this case
//
- Cluster = OFile->FileCurrentCluster;
- StartPos = OFile->Position;
- if (Position < StartPos || OFile->FileCluster == Cluster) {
- StartPos = 0;
- Cluster = OFile->FileCluster;
+ Cluster = OFile->FileCurrentCluster;
+ StartPos = OFile->Position;
+ if ((Position < StartPos) || (OFile->FileCluster == Cluster)) {
+ StartPos = 0;
+ Cluster = OFile->FileCluster;
}
while (StartPos + ClusterSize <= Position) {
StartPos += ClusterSize;
- if (Cluster == FAT_CLUSTER_FREE || (Cluster >= FAT_CLUSTER_SPECIAL)) {
- DEBUG ((DEBUG_INIT | DEBUG_ERROR, "FatOFilePosition:"" cluster chain corrupt\n"));
+ if ((Cluster == FAT_CLUSTER_FREE) || (Cluster >= FAT_CLUSTER_SPECIAL)) {
+ DEBUG ((DEBUG_INIT | DEBUG_ERROR, "FatOFilePosition:" " cluster chain corrupt\n"));
return EFI_VOLUME_CORRUPTED;
}
Cluster = FatGetFatEntry (Volume, Cluster);
}
- if (Cluster < FAT_MIN_CLUSTER || Cluster > Volume->MaxCluster + 1) {
+ if ((Cluster < FAT_MIN_CLUSTER) || (Cluster > Volume->MaxCluster + 1)) {
return EFI_VOLUME_CORRUPTED;
}
- OFile->PosDisk = Volume->FirstClusterPos +
- LShiftU64 (Cluster - FAT_MIN_CLUSTER, Volume->ClusterAlignment) +
- Position - StartPos;
+ OFile->PosDisk = Volume->FirstClusterPos +
+ LShiftU64 (Cluster - FAT_MIN_CLUSTER, Volume->ClusterAlignment) +
+ Position - StartPos;
OFile->FileCurrentCluster = Cluster;
OFile->Position = StartPos;
@@ -650,11 +652,12 @@ FatOFilePosition ( **/
UINTN
FatPhysicalDirSize (
- IN FAT_VOLUME *Volume,
- IN UINTN Cluster
+ IN FAT_VOLUME *Volume,
+ IN UINTN Cluster
)
{
- UINTN Size;
+ UINTN Size;
+
ASSERT_VOLUME_LOCKED (Volume);
//
// Run the cluster chain for the OFile
@@ -666,15 +669,15 @@ FatPhysicalDirSize ( //
if (Cluster != 0) {
while (!FAT_END_OF_FAT_CHAIN (Cluster)) {
- if (Cluster == FAT_CLUSTER_FREE || Cluster >= FAT_CLUSTER_SPECIAL) {
+ if ((Cluster == FAT_CLUSTER_FREE) || (Cluster >= FAT_CLUSTER_SPECIAL)) {
DEBUG (
(DEBUG_INIT | DEBUG_ERROR,
- "FATDirSize: cluster chain corrupt\n")
+ "FATDirSize: cluster chain corrupt\n")
);
return 0;
}
- Size += Volume->ClusterSize;
+ Size += Volume->ClusterSize;
Cluster = FatGetFatEntry (Volume, Cluster);
}
}
@@ -694,14 +697,15 @@ FatPhysicalDirSize ( **/
UINT64
FatPhysicalFileSize (
- IN FAT_VOLUME *Volume,
- IN UINTN RealSize
+ IN FAT_VOLUME *Volume,
+ IN UINTN RealSize
)
{
UINTN ClusterSizeMask;
UINT64 PhysicalSize;
+
ClusterSizeMask = Volume->ClusterSize - 1;
- PhysicalSize = (RealSize + ClusterSizeMask) & (~((UINT64) ClusterSizeMask));
+ PhysicalSize = (RealSize + ClusterSizeMask) & (~((UINT64)ClusterSizeMask));
return PhysicalSize;
}
@@ -714,18 +718,17 @@ FatPhysicalFileSize ( **/
VOID
FatComputeFreeInfo (
- IN FAT_VOLUME *Volume
+ IN FAT_VOLUME *Volume
)
{
- UINTN Index;
+ UINTN Index;
//
// If we don't have valid info, compute it now
//
if (!Volume->FreeInfoValid) {
-
- Volume->FreeInfoValid = TRUE;
- Volume->FatInfoSector.FreeInfo.ClusterCount = 0;
+ Volume->FreeInfoValid = TRUE;
+ Volume->FatInfoSector.FreeInfo.ClusterCount = 0;
for (Index = Volume->MaxCluster + 1; Index >= FAT_MIN_CLUSTER; Index--) {
if (Volume->DiskError) {
break;
@@ -733,7 +736,7 @@ FatComputeFreeInfo ( if (FatGetFatEntry (Volume, Index) == FAT_CLUSTER_FREE) {
Volume->FatInfoSector.FreeInfo.ClusterCount += 1;
- Volume->FatInfoSector.FreeInfo.NextCluster = (UINT32) Index;
+ Volume->FatInfoSector.FreeInfo.NextCluster = (UINT32)Index;
}
}
|