diff options
author | Qing Huang <qing.huang@intel.com> | 2007-12-20 09:16:45 +0000 |
---|---|---|
committer | Jordan Justen <jordan.l.justen@intel.com> | 2016-04-06 23:22:43 -0700 |
commit | b9ec93308b33bcb0bb37d6213a76c3fed0b5bc0b (patch) | |
tree | ed4cc299df8f82781a6e6fae2022d2411ddc9c89 /FatPkg/EnhancedFatDxe/Init.c | |
parent | f0dc69e61bf2316dcf7cc75eb7e4ba374a5b2832 (diff) | |
download | edk2-platforms-b9ec93308b33bcb0bb37d6213a76c3fed0b5bc0b.tar.xz |
Add EDK II Prime FatPkg New Feature: Support both Unicode Collation and Unicode Collation 2 Protocols Support both Component Name and Component Name 2 Protocol.
(based on FatPkg commit e51cd032db84a6fb1f44a0605f80d96f5fdf4bc6)
[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>
Diffstat (limited to 'FatPkg/EnhancedFatDxe/Init.c')
-rw-r--r-- | FatPkg/EnhancedFatDxe/Init.c | 431 |
1 files changed, 431 insertions, 0 deletions
diff --git a/FatPkg/EnhancedFatDxe/Init.c b/FatPkg/EnhancedFatDxe/Init.c new file mode 100644 index 0000000000..a532b56b29 --- /dev/null +++ b/FatPkg/EnhancedFatDxe/Init.c @@ -0,0 +1,431 @@ +/*++
+
+Copyright (c) 2005 - 2007, Intel Corporation
+All rights reserved. This program and the accompanying materials are licensed and made available
+under the terms and conditions of the BSD License which accompanies this
+distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+
+Module Name:
+
+ Init.c
+
+Abstract:
+
+ Initialization routines
+
+--*/
+
+#include "Fat.h"
+
+EFI_STATUS
+FatAllocateVolume (
+ IN EFI_HANDLE Handle,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo
+ )
+/*++
+
+Routine Description:
+
+ Allocates volume structure, detects FAT file system, installs protocol,
+ and initialize cache.
+
+Arguments:
+
+ Handle - The handle of parent device.
+ DiskIo - The DiskIo of parent device.
+ BlockIo - The BlockIo of parent devicel
+
+Returns:
+
+ EFI_SUCCESS - Allocate a new volume successfully.
+ EFI_OUT_OF_RESOURCES - Can not allocate the memory.
+ Others - Allocating a new volume failed.
+
+--*/
+{
+ EFI_STATUS Status;
+ FAT_VOLUME *Volume;
+ BOOLEAN LockedByMe;
+ LockedByMe = FALSE;
+ //
+ // Allocate a volume structure
+ //
+ Volume = AllocateZeroPool (sizeof (FAT_VOLUME));
+ if (Volume == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // Acquire the lock.
+ // If caller has already acquired the lock, cannot lock it again.
+ //
+ if (!FatIsLocked ()) {
+ FatAcquireLock ();
+ LockedByMe = TRUE;
+ }
+ //
+ // Initialize the structure
+ //
+ Volume->Signature = FAT_VOLUME_SIGNATURE;
+ Volume->Handle = Handle;
+ Volume->DiskIo = DiskIo;
+ Volume->BlockIo = BlockIo;
+ Volume->MediaId = BlockIo->Media->MediaId;
+ Volume->ReadOnly = BlockIo->Media->ReadOnly;
+ Volume->VolumeInterface.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
+ Volume->VolumeInterface.OpenVolume = FatOpenVolume;
+ InitializeListHead (&Volume->CheckRef);
+ InitializeListHead (&Volume->DirCacheList);
+ //
+ // Initialize Root Directory entry
+ //
+ Volume->RootDirEnt.FileString = Volume->RootFileString;
+ Volume->RootDirEnt.Entry.Attributes = FAT_ATTRIBUTE_DIRECTORY;
+ //
+ // Check to see if there's a file system on the volume
+ //
+ Status = FatOpenDevice (Volume);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // Initialize cache
+ //
+ Status = FatInitializeDiskCache (Volume);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // Install our protocol interfaces on the device's handle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &Volume->Handle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ &Volume->VolumeInterface,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ //
+ // Volume installed
+ //
+ DEBUG ((EFI_D_INIT, "%HInstalled Fat filesystem on %x%N\n", Handle));
+ Volume->Valid = TRUE;
+
+Done:
+ //
+ // Unlock if locked by myself.
+ //
+ if (LockedByMe) {
+ FatReleaseLock ();
+ }
+
+ if (EFI_ERROR (Status)) {
+ FatFreeVolume (Volume);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+FatAbandonVolume (
+ IN FAT_VOLUME *Volume
+ )
+/*++
+
+Routine Description:
+
+ Called by FatDriverBindingStop(), Abandon the volume.
+
+Arguments:
+
+ Volume - The volume to be abandoned.
+
+Returns:
+
+ EFI_SUCCESS - Abandoned the volume successfully.
+ Others - Can not uninstall the protocol interfaces.
+
+--*/
+{
+ EFI_STATUS Status;
+ BOOLEAN LockedByMe;
+
+ //
+ // Uninstall the protocol interface.
+ //
+ if (Volume->Handle != NULL) {
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ Volume->Handle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ &Volume->VolumeInterface,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ LockedByMe = FALSE;
+
+ //
+ // Acquire the lock.
+ // If the caller has already acquired the lock (which
+ // means we are in the process of some Fat operation),
+ // we can not acquire again.
+ //
+ if (!FatIsLocked ()) {
+ LockedByMe = TRUE;
+ FatAcquireLock ();
+ }
+ //
+ // The volume is still being used. Hence, set error flag for all OFiles still in
+ // use. In two cases, we could get here. One is EFI_MEDIA_CHANGED, the other is
+ // EFI_NO_MEDIA.
+ //
+ if (Volume->Root != NULL) {
+ FatSetVolumeError (
+ Volume->Root,
+ Volume->BlockIo->Media->MediaPresent ? EFI_MEDIA_CHANGED : EFI_NO_MEDIA
+ );
+ }
+
+ Volume->Valid = FALSE;
+
+ //
+ // Release the lock.
+ // If locked by me, this means DriverBindingStop is NOT
+ // called within an on-going Fat operation, so we should
+ // take responsibility to cleanup and free the volume.
+ // Otherwise, the DriverBindingStop is called within an on-going
+ // Fat operation, we shouldn't check reference, so just let outer
+ // FatCleanupVolume do the task.
+ //
+ if (LockedByMe) {
+ FatCleanupVolume (Volume, NULL, EFI_SUCCESS);
+ FatReleaseLock ();
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+FatOpenDevice (
+ IN OUT FAT_VOLUME *Volume
+ )
+/*++
+
+Routine Description:
+
+ Detects FAT file system on Disk and set relevant fields of Volume
+
+Arguments:
+
+ Volume - The volume structure.
+
+Returns:
+
+ EFI_SUCCESS - The Fat File System is detected successfully
+ EFI_UNSUPPORTED - The volume is not FAT file system.
+ EFI_VOLUME_CORRUPTED - The volume is corrupted.
+
+--*/
+{
+ EFI_STATUS Status;
+ UINT32 BlockSize;
+ UINT32 DirtyMask;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+ FAT_BOOT_SECTOR FatBs;
+ FAT_VOLUME_TYPE FatType;
+ UINTN RootDirSectors;
+ UINTN FatLba;
+ UINTN RootLba;
+ UINTN FirstClusterLba;
+ UINTN Sectors;
+ UINTN SectorsPerFat;
+ UINT8 SectorsPerClusterAlignment;
+ UINT8 BlockAlignment;
+
+ //
+ // Read the FAT_BOOT_SECTOR BPB info
+ // This is the only part of FAT code that uses parent DiskIo,
+ // Others use FatDiskIo which utilizes a Cache.
+ //
+ DiskIo = Volume->DiskIo;
+ Status = DiskIo->ReadDisk (DiskIo, Volume->MediaId, 0, sizeof (FatBs), &FatBs);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_INIT, "FatOpenDevice: read of part_lba failed %r\n", Status));
+ return Status;
+ }
+
+ FatType = FatUndefined;
+
+ //
+ // Use LargeSectors if Sectors is 0
+ //
+ Sectors = FatBs.FatBsb.Sectors;
+ if (Sectors == 0) {
+ Sectors = FatBs.FatBsb.LargeSectors;
+ }
+
+ SectorsPerFat = FatBs.FatBsb.SectorsPerFat;
+ if (SectorsPerFat == 0) {
+ SectorsPerFat = FatBs.FatBse.Fat32Bse.LargeSectorsPerFat;
+ FatType = FAT32;
+ }
+ //
+ // Is boot sector a fat sector?
+ // (Note that so far we only know if the sector is FAT32 or not, we don't
+ // know if the sector is Fat16 or Fat12 until later when we can compute
+ // the volume size)
+ //
+ if (FatBs.FatBsb.ReservedSectors == 0 || FatBs.FatBsb.NumFats == 0 || Sectors == 0) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if ((FatBs.FatBsb.SectorSize & (FatBs.FatBsb.SectorSize - 1)) != 0) {
+ return EFI_UNSUPPORTED;
+ }
+
+ BlockAlignment = (UINT8) HighBitSet32 (FatBs.FatBsb.SectorSize);
+ if (BlockAlignment > MAX_BLOCK_ALIGNMENT || BlockAlignment < MIN_BLOCK_ALIGNMENT) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if ((FatBs.FatBsb.SectorsPerCluster & (FatBs.FatBsb.SectorsPerCluster - 1)) != 0) {
+ return EFI_UNSUPPORTED;
+ }
+
+ SectorsPerClusterAlignment = (UINT8) HighBitSet32 (FatBs.FatBsb.SectorsPerCluster);
+ if (SectorsPerClusterAlignment > MAX_SECTORS_PER_CLUSTER_ALIGNMENT) {
+ return EFI_UNSUPPORTED;
+ }
+
+ if (FatBs.FatBsb.Media <= 0xf7 &&
+ FatBs.FatBsb.Media != 0xf0 &&
+ FatBs.FatBsb.Media != 0x00 &&
+ FatBs.FatBsb.Media != 0x01
+ ) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Initialize fields the volume information for this FatType
+ //
+ if (FatType != FAT32) {
+ if (FatBs.FatBsb.RootEntries == 0) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Unpack fat12, fat16 info
+ //
+ Volume->RootEntries = FatBs.FatBsb.RootEntries;
+ } else {
+ //
+ // If this is fat32, refuse to mount mirror-disabled volumes
+ //
+ if ((SectorsPerFat == 0 || FatBs.FatBse.Fat32Bse.FsVersion != 0) || (FatBs.FatBse.Fat32Bse.ExtendedFlags & 0x80)) {
+ return EFI_UNSUPPORTED;
+ }
+ //
+ // Unpack fat32 info
+ //
+ Volume->RootCluster = FatBs.FatBse.Fat32Bse.RootDirFirstCluster;
+ }
+
+ Volume->NumFats = FatBs.FatBsb.NumFats;
+ //
+ // Compute some fat locations
+ //
+ BlockSize = FatBs.FatBsb.SectorSize;
+ RootDirSectors = ((Volume->RootEntries * sizeof (FAT_DIRECTORY_ENTRY)) + (BlockSize - 1)) / BlockSize;
+
+ FatLba = FatBs.FatBsb.ReservedSectors;
+ RootLba = FatBs.FatBsb.NumFats * SectorsPerFat + FatLba;
+ FirstClusterLba = RootLba + RootDirSectors;
+
+ Volume->FatPos = FatLba * BlockSize;
+ Volume->FatSize = SectorsPerFat * BlockSize;
+
+ Volume->VolumeSize = LShiftU64 (Sectors, BlockAlignment);
+ Volume->RootPos = LShiftU64 (RootLba, BlockAlignment);
+ Volume->FirstClusterPos = LShiftU64 (FirstClusterLba, BlockAlignment);
+ Volume->MaxCluster = (Sectors - FirstClusterLba) >> SectorsPerClusterAlignment;
+ Volume->ClusterAlignment = (UINT8)(BlockAlignment + SectorsPerClusterAlignment);
+ Volume->ClusterSize = (UINTN)1 << (Volume->ClusterAlignment);
+
+ //
+ // If this is not a fat32, determine if it's a fat16 or fat12
+ //
+ if (FatType != FAT32) {
+ if (Volume->MaxCluster >= FAT_MAX_FAT16_CLUSTER) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ FatType = Volume->MaxCluster < FAT_MAX_FAT12_CLUSTER ? FAT12 : FAT16;
+ //
+ // fat12 & fat16 fat-entries are 2 bytes
+ //
+ Volume->FatEntrySize = sizeof (UINT16);
+ DirtyMask = FAT16_DIRTY_MASK;
+ } else {
+ if (Volume->MaxCluster < FAT_MAX_FAT16_CLUSTER) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+ //
+ // fat32 fat-entries are 4 bytes
+ //
+ Volume->FatEntrySize = sizeof (UINT32);
+ DirtyMask = FAT32_DIRTY_MASK;
+ }
+ //
+ // Get the DirtyValue and NotDirtyValue
+ // We should keep the initial value as the NotDirtyValue
+ // in case the volume is dirty already
+ //
+ if (FatType != FAT12) {
+ Status = FatAccessVolumeDirty (Volume, READ_DISK, &Volume->NotDirtyValue);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Volume->DirtyValue = Volume->NotDirtyValue & DirtyMask;
+ }
+ //
+ // If present, read the fat hint info
+ //
+ if (FatType == FAT32) {
+ Volume->FreeInfoPos = FatBs.FatBse.Fat32Bse.FsInfoSector * BlockSize;
+ if (FatBs.FatBse.Fat32Bse.FsInfoSector != 0) {
+ FatDiskIo (Volume, READ_DISK, Volume->FreeInfoPos, sizeof (FAT_INFO_SECTOR), &Volume->FatInfoSector);
+ if (Volume->FatInfoSector.Signature == FAT_INFO_SIGNATURE &&
+ Volume->FatInfoSector.InfoBeginSignature == FAT_INFO_BEGIN_SIGNATURE &&
+ Volume->FatInfoSector.InfoEndSignature == FAT_INFO_END_SIGNATURE &&
+ Volume->FatInfoSector.FreeInfo.ClusterCount <= Volume->MaxCluster
+ ) {
+ Volume->FreeInfoValid = TRUE;
+ }
+ }
+ }
+ //
+ // Just make up a FreeInfo.NextCluster for use by allocate cluster
+ //
+ if (FAT_MIN_CLUSTER > Volume->FatInfoSector.FreeInfo.NextCluster ||
+ Volume->FatInfoSector.FreeInfo.NextCluster > Volume->MaxCluster + 1
+ ) {
+ Volume->FatInfoSector.FreeInfo.NextCluster = FAT_MIN_CLUSTER;
+ }
+ //
+ // We are now defining FAT Type
+ //
+ Volume->FatType = FatType;
+ ASSERT (FatType != FatUndefined);
+
+ return EFI_SUCCESS;
+}
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