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- Index: src/add-ons/kernel/file_systems/ext2/InodeJournal.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/InodeJournal.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/InodeJournal.h (revision 0)
- @@ -0,0 +1,29 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef INODEJOURNAL_H
- +#define INODEJOURNAL_H
- +
- +
- +#include "Inode.h"
- +#include "Journal.h"
- +
- +
- +class InodeJournal : public Journal {
- +public:
- + InodeJournal(Inode* inode);
- + ~InodeJournal();
- +
- + status_t InitCheck();
- +
- + status_t MapBlock(uint32 logical, uint32& physical);
- +private:
- + Inode* fInode;
- + status_t fInitStatus;
- +};
- +
- +#endif // INODEJOURNAL_H
- Index: src/add-ons/kernel/file_systems/ext2/InodeAllocator.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/InodeAllocator.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/InodeAllocator.cpp (revision 0)
- @@ -0,0 +1,123 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "InodeAllocator.h"
- +
- +#include <util/AutoLock.h>
- +
- +#include "BitmapBlock.h"
- +#include "Inode.h"
- +#include "Volume.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +InodeAllocator::InodeAllocator(Volume* volume)
- + :
- + fVolume(volume)
- +{
- + mutex_init(&fLock, "ext2 inode allocator");
- +}
- +
- +
- +InodeAllocator::~InodeAllocator()
- +{
- + mutex_destroy(&fLock);
- +}
- +
- +
- +/*virtual*/ status_t
- +InodeAllocator::New(Transaction& transaction, Inode* parent, int32 mode,
- + ino_t& id)
- +{
- + // Apply allocation policy
- + uint32 preferredBlockGroup = parent == NULL ? parent->ID()
- + / parent->GetVolume()->InodesPerGroup() : 0;
- +
- + return _Allocate(transaction, preferredBlockGroup, id);
- +}
- +
- +
- +status_t
- +InodeAllocator::_Allocate(Transaction& transaction, uint32 preferredBlockGroup,
- + ino_t& id)
- +{
- + MutexLocker lock(fLock);
- +
- + uint32 blockGroup = preferredBlockGroup;
- + uint32 lastBlockGroup = fVolume->NumGroups() - 1;
- +
- + for (int i = 0; i < 2; ++i) {
- + for (; blockGroup < lastBlockGroup; ++blockGroup) {
- + ext2_block_group* group;
- +
- + status_t status = fVolume->GetBlockGroup(blockGroup, &group);
- + if (status != B_OK)
- + return status;
- +
- + if (group->FreeInodes() != 0) {
- + return _MarkInBitmap(transaction, group->InodeBitmap(),
- + blockGroup, fVolume->InodesPerGroup(), id);
- + }
- + }
- +
- + if (i == 0) {
- + ext2_block_group* group;
- +
- + status_t status = fVolume->GetBlockGroup(blockGroup, &group);
- + if (status != B_OK)
- + return status;
- +
- + if (group->FreeInodes() != 0) {
- + return _MarkInBitmap(transaction, group->InodeBitmap(),
- + blockGroup, fVolume->NumInodes()
- + - blockGroup * fVolume->InodesPerGroup(), id);
- + }
- + }
- +
- + blockGroup = 0;
- + lastBlockGroup = preferredBlockGroup;
- + }
- +
- + return B_DEVICE_FULL;
- +}
- +
- +
- +status_t
- +InodeAllocator::_MarkInBitmap(Transaction& transaction, uint32 bitmapBlock,
- + uint32 blockGroup, uint32 numInodes, ino_t& id)
- +{
- + BitmapBlock inodeBitmap(fVolume, numInodes);
- +
- + if (!inodeBitmap.SetToWritable(transaction, bitmapBlock)) {
- + TRACE("Unable to open inode bitmap (block number: %lu) for block group "
- + "%lu\n", bitmapBlock, blockGroup);
- + return B_IO_ERROR;
- + }
- +
- + uint32 pos = 0;
- + inodeBitmap.FindNextUnmarked(pos);
- +
- + if (pos == inodeBitmap.NumBits()) {
- + TRACE("Even though the block group %lu indicates there are free "
- + "inodes, no unmarked bit was found in the inode bitmap at block "
- + "%lu.", blockGroup, bitmapBlock);
- + return B_ERROR;
- + }
- +
- + inodeBitmap.Mark(pos, true);
- + id = pos + blockGroup * fVolume->InodesPerGroup();
- +
- + return B_OK;
- +}
- Property changes on: src/add-ons/kernel/file_systems/ext2/InodeAllocator.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/BlockAllocator.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/BlockAllocator.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/BlockAllocator.h (revision 0)
- @@ -0,0 +1,53 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef BLOCKALLOCATOR_H
- +#define BLOCKALLOCATOR_H
- +
- +#include <lock.h>
- +
- +#include "Transaction.h"
- +
- +
- +class AllocationBlockGroup;
- +class Inode;
- +class Volume;
- +
- +
- +class BlockAllocator {
- +public:
- + BlockAllocator(Volume* volume);
- + ~BlockAllocator();
- +
- + status_t Initialize();
- +
- + status_t AllocateBlocks(Transaction& transaction,
- + uint32 minimum, uint32 maximum, uint32& blockGroup,
- + uint32& start, uint32& length);
- + status_t Allocate(Transaction& transaction, Inode* inode,
- + off_t numBlocks, uint32 minimum, uint32& start,
- + uint32& length);
- + status_t Free(Transaction& transaction, uint32 start,
- + uint32 length);
- +
- + uint32 FreeBlocks();
- +
- +protected:
- + static status_t _Initialize(BlockAllocator* allocator);
- +
- +
- + Volume* fVolume;
- + mutex fLock;
- +
- + AllocationBlockGroup* fGroups;
- + uint32 fBlocksPerGroup;
- + uint32 fNumBlocks;
- + uint32 fNumGroups;
- + uint32 fFirstBlock;
- +};
- +
- +#endif // BLOCKALLOCATOR_H
- Property changes on: src/add-ons/kernel/file_systems/ext2/BlockAllocator.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.cpp (working copy)
- @@ -11,8 +11,8 @@
- #include <new>
- +#include "CachedBlock.h"
- #include "HTree.h"
- -#include "IndexedDirectoryIterator.h"
- #include "Inode.h"
- @@ -27,81 +27,92 @@
- HTreeEntryIterator::HTreeEntryIterator(off_t offset, Inode* directory)
- :
- + fDirectory(directory),
- + fVolume(directory->GetVolume()),
- fHasCollision(false),
- - fDirectory(directory),
- - fOffset(offset),
- + fBlockSize(directory->GetVolume()->BlockSize()),
- fParent(NULL),
- fChild(NULL)
- {
- - fBlockSize = fDirectory->GetVolume()->BlockSize();
- + fInitStatus = fDirectory->FindBlock(offset, fBlockNum);
- +
- + if (fInitStatus == B_OK) {
- + fFirstEntry = offset % fBlockSize / sizeof(HTreeEntry);
- + fCurrentEntry = fFirstEntry;
- + }
- +
- + TRACE("HTreeEntryIterator::HTreeEntryIterator() block %lu entry no. %lu\n",
- + fBlockNum, (uint32)fCurrentEntry);
- }
- HTreeEntryIterator::HTreeEntryIterator(uint32 block, uint32 blockSize,
- Inode* directory, HTreeEntryIterator* parent, bool hasCollision)
- :
- + fDirectory(directory),
- + fVolume(directory->GetVolume()),
- fHasCollision(hasCollision),
- + fFirstEntry(1),
- + fCurrentEntry(1),
- fBlockSize(blockSize),
- - fDirectory(directory),
- - fOffset(block * blockSize + sizeof(HTreeFakeDirEntry)),
- + fBlockNum(block),
- fParent(parent),
- fChild(NULL)
- {
- - TRACE("HTreeEntryIterator::HTreeEntryIterator() block %ld offset %Lx\n",
- - block, fOffset);
- + // fCurrentEntry is initialized to 1 to skip the fake directory entry
- + fInitStatus = B_OK;
- +
- + TRACE("HTreeEntryIterator::HTreeEntryIterator() block %lu\n", block);
- }
- status_t
- HTreeEntryIterator::Init()
- {
- - size_t length = sizeof(HTreeCountLimit);
- - HTreeCountLimit countLimit;
- + TRACE("HTreeEntryIterator::Init() first entry: %lu\n",
- + (uint32)fFirstEntry);
- - status_t status = fDirectory->ReadAt(fOffset, (uint8*)&countLimit,
- - &length);
- -
- - if (status != B_OK)
- - return status;
- -
- - if (length != sizeof(HTreeCountLimit)) {
- - ERROR("HTreeEntryIterator::Init() bad length %ld fOffset 0x%Lx\n",
- - length, fOffset);
- + if (fInitStatus != B_OK)
- + return fInitStatus;
- +
- + CachedBlock cached(fVolume);
- + const uint8* block = cached.SetTo(fBlockNum);
- + if (block == NULL) {
- + ERROR("Failed to read htree entry block.\n");
- fCount = fLimit = 0;
- - return B_ERROR;
- + return B_IO_ERROR;
- }
- -
- - fCount = countLimit.Count();
- - fLimit = countLimit.Limit();
- + HTreeCountLimit* countLimit = (HTreeCountLimit*)(
- + &((HTreeEntry*)block)[fFirstEntry]);
- +
- + fCount = countLimit->Count();
- + fLimit = countLimit->Limit();
- +
- if (fCount >= fLimit) {
- - ERROR("HTreeEntryIterator::Init() bad fCount %d fOffset 0x%Lx\n",
- - fCount, fOffset);
- + ERROR("HTreeEntryIterator::Init() bad fCount %lu\n", (uint32)fCount);
- fCount = fLimit = 0;
- return B_ERROR;
- }
- - if (fParent != NULL &&
- - fLimit != ((fBlockSize - sizeof(HTreeFakeDirEntry))
- - / sizeof(HTreeEntry)) ) {
- - ERROR("HTreeEntryIterator::Init() bad fLimit %d should be %ld "
- - "fOffset 0x%Lx\n", fLimit, (fBlockSize - sizeof(HTreeFakeDirEntry))
- - / sizeof(HTreeEntry), fOffset);
- + if (fLimit != fBlockSize / sizeof(HTreeEntry) - fFirstEntry) {
- + ERROR("HTreeEntryIterator::Init() bad fLimit %lu should be %lu "
- + "at block %lu\n", (uint32)fLimit, fBlockSize / sizeof(HTreeEntry)
- + - fFirstEntry, fBlockNum);
- fCount = fLimit = 0;
- return B_ERROR;
- - }
- + }
- - TRACE("HTreeEntryIterator::Init() count 0x%x limit 0x%x\n", fCount,
- - fLimit);
- + TRACE("HTreeEntryIterator::Init() count %lu limit %lu\n",
- + (uint32)fCount, (uint32)fLimit);
- - fMaxOffset = fOffset + (fCount - 1) * sizeof(HTreeEntry);
- -
- return B_OK;
- }
- HTreeEntryIterator::~HTreeEntryIterator()
- {
- + delete fChild;
- }
- @@ -109,68 +120,80 @@
- HTreeEntryIterator::Lookup(uint32 hash, int indirections,
- DirectoryIterator** directoryIterator)
- {
- - off_t start = fOffset + sizeof(HTreeEntry);
- - off_t end = fMaxOffset;
- - off_t middle = start;
- - size_t entrySize = sizeof(HTreeEntry);
- - HTreeEntry entry;
- + TRACE("HTreeEntryIterator::Lookup()\n");
- +
- + if (fCount == 0)
- + return B_ENTRY_NOT_FOUND;
- +
- + CachedBlock cached(fVolume);
- + const uint8* block = cached.SetTo(fBlockNum);
- + if (block == NULL) {
- + ERROR("Failed to read htree entry block.\n");
- + // Fallback to linear search
- + *directoryIterator = new(std::nothrow)
- + DirectoryIterator(fDirectory);
- +
- + if (*directoryIterator == NULL)
- + return B_NO_MEMORY;
- +
- + return B_OK;
- + }
- +
- + HTreeEntry* start = (HTreeEntry*)block + fCurrentEntry + 1;
- + HTreeEntry* end = (HTreeEntry*)block + fCount + fFirstEntry - 1;
- + HTreeEntry* middle = start;
- + TRACE("HTreeEntryIterator::Lookup() current entry: %lu\n",
- + (uint32)fCurrentEntry);
- + TRACE("HTreeEntryIterator::Lookup() indirections: %d s:%p m:%p e:%p\n",
- + indirections, start, middle, end);
- +
- while (start <= end) {
- - middle = (end - start) / 2;
- - middle -= middle % entrySize; // Alignment
- - middle += start;
- + middle = (HTreeEntry*)((end - start) / 2
- + + start);
- - TRACE("HTreeEntryIterator::Lookup() %d 0x%Lx 0x%Lx 0x%Lx\n",
- - indirections, start, end, middle);
- -
- - status_t status = fDirectory->ReadAt(middle, (uint8*)&entry,
- - &entrySize);
- + TRACE("HTreeEntryIterator::Lookup() indirections: %d s:%p m:%p e:%p\n",
- + indirections, start, middle, end);
- - TRACE("HTreeEntryIterator::Lookup() %lx %lx\n", hash, entry.Hash());
- -
- - if (status != B_OK)
- - return status;
- - else if (entrySize != sizeof(entry)) {
- - // Fallback to linear search
- - *directoryIterator = new(std::nothrow)
- - DirectoryIterator(fDirectory);
- -
- - if (*directoryIterator == NULL)
- - return B_NO_MEMORY;
- -
- - return B_OK;
- - }
- -
- - if (hash >= entry.Hash())
- - start = middle + entrySize;
- + TRACE("HTreeEntryIterator::Lookup() %lx %lx\n", hash, middle->Hash());
- +
- + if (hash >= middle->Hash())
- + start = middle + 1;
- else
- - end = middle - entrySize;
- + end = middle - 1;
- }
- - status_t status = fDirectory->ReadAt(start - entrySize, (uint8*)&entry,
- - &entrySize);
- - if (status != B_OK)
- - return status;
- -
- + --start;
- +
- + fCurrentEntry = ((uint8*)start - block) / sizeof(HTreeEntry);
- +
- if (indirections == 0) {
- + TRACE("HTreeEntryIterator::Lookup(): Creating an indexed directory "
- + "iterator starting at block: %lu, hash: 0x%lX\n", start->Block(),
- + start->Hash());
- *directoryIterator = new(std::nothrow)
- - IndexedDirectoryIterator(entry.Block() * fBlockSize, fBlockSize,
- - fDirectory, this);
- -
- + DirectoryIterator(fDirectory, start->Block() * fBlockSize, this);
- +
- if (*directoryIterator == NULL)
- return B_NO_MEMORY;
- return B_OK;
- }
- + TRACE("HTreeEntryIterator::Lookup(): Creating a HTree entry iterator "
- + "starting at block: %lu, hash: 0x%lX\n", start->Block(), start->Hash());
- + uint32 blockNum;
- + status_t status = fDirectory->FindBlock(start->Block() * fBlockSize,
- + blockNum);
- + if (status != B_OK)
- + return status;
- +
- delete fChild;
- - fChild = new(std::nothrow) HTreeEntryIterator(entry.Block(), fBlockSize,
- - fDirectory, this, entry.Hash() & 1 == 1);
- -
- + fChild = new(std::nothrow) HTreeEntryIterator(blockNum, fBlockSize,
- + fDirectory, this, start->Hash() & 1 == 1);
- if (fChild == NULL)
- return B_NO_MEMORY;
- - fChildDeleter.SetTo(fChild);
- status = fChild->Init();
- if (status != B_OK)
- @@ -181,40 +204,62 @@
- status_t
- -HTreeEntryIterator::GetNext(off_t& childOffset)
- +HTreeEntryIterator::GetNext(uint32& childBlock)
- {
- - size_t entrySize = sizeof(HTreeEntry);
- - fOffset += entrySize;
- - bool firstEntry = fOffset >= fMaxOffset;
- -
- - if (firstEntry) {
- - if (fParent == NULL)
- + fCurrentEntry++;
- + TRACE("HTreeEntryIterator::GetNext(): current entry: %lu\n",
- + (uint32)fCurrentEntry);
- + bool endOfBlock = fCurrentEntry >= (fCount + fFirstEntry);
- +
- + if (endOfBlock) {
- + TRACE("HTreeEntryIterator::GetNext(): end of entries in the block\n");
- + if (fParent == NULL) {
- + TRACE("HTreeEntryIterator::GetNext(): block was the root block\n");
- return B_ENTRY_NOT_FOUND;
- + }
- - status_t status = fParent->GetNext(fOffset);
- + uint32 logicalBlock;
- + status_t status = fParent->GetNext(logicalBlock);
- if (status != B_OK)
- return status;
- + TRACE("HTreeEntryIterator::GetNext(): moving to next block: %lu\n",
- + logicalBlock);
- +
- + status = fDirectory->FindBlock(logicalBlock * fBlockSize, fBlockNum);
- + if (status != B_OK)
- + return status;
- +
- + fFirstEntry = 1; // Skip fake directory entry
- + fCurrentEntry = 1;
- status = Init();
- if (status != B_OK)
- return status;
- fHasCollision = fParent->HasCollision();
- }
- +
- + CachedBlock cached(fVolume);
- + const uint8* block = cached.SetTo(fBlockNum);
- + if (block == NULL)
- + return B_IO_ERROR;
- +
- + HTreeEntry* entry = &((HTreeEntry*)block)[fCurrentEntry];
- +
- + if (!endOfBlock)
- + fHasCollision = (entry[fCurrentEntry].Hash() & 1) == 1;
- - HTreeEntry entry;
- - status_t status = fDirectory->ReadAt(fOffset, (uint8*)&entry, &entrySize);
- - if (status != B_OK)
- - return status;
- - else if (entrySize != sizeof(entry)) {
- - // Weird error, try to skip it
- - return GetNext(childOffset);
- - }
- + TRACE("HTreeEntryIterator::GetNext(): next block: %lu\n",
- + entry->Block());
- +
- + childBlock = entry->Block();
- - if (!firstEntry)
- - fHasCollision = (entry.Hash() & 1) == 1;
- -
- - childOffset = entry.Block() * fBlockSize;
- -
- return B_OK;
- }
- +
- +
- +status_t
- +HTreeEntryIterator::InsertEntry(uint32 hash, uint32 block, bool hasCollision)
- +{
- + return B_OK;
- +}
- Index: src/add-ons/kernel/file_systems/ext2/Inode.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Inode.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/Inode.h (working copy)
- @@ -12,7 +12,7 @@
- #include "Volume.h"
- -class Inode {
- +class Inode : public TransactionListener {
- public:
- Inode(Volume* volume, ino_t id);
- ~Inode();
- @@ -22,7 +22,11 @@
- ino_t ID() const { return fID; }
- rw_lock* Lock() { return &fLock; }
- + void WriteLockInTransaction(Transaction& transaction);
- + status_t UpdateNodeFromDisk();
- + status_t WriteBack(Transaction& transaction);
- +
- bool IsDirectory() const
- { return S_ISDIR(Mode()); }
- bool IsFile() const
- @@ -32,44 +36,166 @@
- status_t CheckPermissions(int accessMode) const;
- - mode_t Mode() const { return fNode->Mode(); }
- - int32 Flags() const { return fNode->Flags(); }
- + mode_t Mode() const { return fNode.Mode(); }
- + int32 Flags() const { return fNode.Flags(); }
- - off_t Size() const { return fNode->Size(); }
- + off_t Size() const { return fNode.Size(); }
- time_t ModificationTime() const
- - { return fNode->ModificationTime(); }
- + { return fNode.ModificationTime(); }
- time_t CreationTime() const
- - { return fNode->CreationTime(); }
- + { return fNode.CreationTime(); }
- time_t AccessTime() const
- - { return fNode->AccessTime(); }
- + { return fNode.AccessTime(); }
- //::Volume* _Volume() const { return fVolume; }
- Volume* GetVolume() const { return fVolume; }
- status_t FindBlock(off_t offset, uint32& block);
- status_t ReadAt(off_t pos, uint8 *buffer, size_t *length);
- + status_t WriteAt(Transaction& transaction, off_t pos, uint8* buffer, size_t* length);
- + status_t FillGapWithZeros(off_t start, off_t end);
- + status_t Resize(Transaction& transaction, off_t size);
- +
- status_t AttributeBlockReadAt(off_t pos, uint8 *buffer,
- size_t *length);
- - ext2_inode& Node() { return *fNode; }
- + ext2_inode& Node() { return fNode; }
- + status_t InitDirectory(Transaction& transaction, Inode* parent);
- +
- + static status_t Create(Transaction& transaction, Inode* parent,
- + const char* name, int32 mode, int openMode,
- + uint32 type, bool* _created = NULL,
- + ino_t* _id = NULL, Inode** _inode = NULL,
- + fs_vnode_ops* vnodeOps = NULL,
- + uint32 publishFlags = 0);
- +
- void* FileCache() const { return fCache; }
- void* Map() const { return fMap; }
- + status_t DisableFileCache();
- + bool IsFileCacheDisabled() const { return !fCached; }
- +protected:
- + virtual void TransactionDone(bool success);
- + virtual void RemovedFromTransaction();
- +
- +
- private:
- + Inode(Volume* volume);
- Inode(const Inode&);
- Inode &operator=(const Inode&);
- // no implementation
- + status_t _EnlargeDataStream(Transaction& transaction,
- + off_t size);
- + status_t _ShrinkDataStream(Transaction& transaction, off_t size);
- +
- + status_t _FreeDirectBlocks(Transaction& transaction,
- + uint32* block, uint32* maxPos);
- + status_t _FreeIndirectBlock(Transaction& transaction,
- + uint32* indirectBlock, uint32* maxIndirectPos);
- + status_t _FreeDoubleIndirectBlock(Transaction& transaction,
- + uint32* doubleIndirectBlock,
- + uint32* maxDoubleIndirectPos);
- + status_t _FreeTripleIndirectBlock(Transaction& transaction,
- + uint32* tripleIndirectBlock,
- + uint32* maxTripleIndirectPos);
- +
- + status_t _GetBlockFromAllocation(Transaction& transaction,
- + uint32& blocksNeeded, uint32& allocated,
- + uint32& allocatedPos, uint32& block);
- + void _MapBlocksInIndirectBlock(uint32* block,
- + uint32* maxPos, uint32 increment, uint32& length,
- + uint32& rangePos);
- + status_t _MapBlocksInDoubleIndirectBlock(
- + Transaction& transaction,
- + uint32* doubleIndirectBlock,
- + uint32* maxDoubleIndirectPos, uint32* indirectBlock,
- + uint32* maxIndirectPos, uint32 increment,
- + uint32& blocksNeeded, uint32& allocated,
- + uint32& allocatedPos, uint32& length,
- + uint32& rangePos);
- + status_t _MapBlocksInDataStream(Transaction& transaction,
- + uint32 mapPos, uint32 rangePos, uint32 length,
- + uint32 preferredBlockGroup);
- +
- +
- + rw_lock fLock;
- + ::Volume* fVolume;
- + ino_t fID;
- + void* fCache;
- + void* fMap;
- + bool fCached;
- + ext2_inode fNode;
- + uint32 fNodeSize;
- + // Inodes have a varible size, but the important
- + // information is always the same size (except in ext4)
- + ext2_xattr_header* fAttributesBlock;
- + status_t fInitStatus;
- +};
- +
- +
- +// The Vnode class provides a convenience layer upon get_vnode(), so that
- +// you don't have to call put_vnode() anymore, which may make code more
- +// readable in some cases
- +
- +class Vnode {
- +public:
- + Vnode(Volume* volume, ino_t id)
- + :
- + fInode(NULL)
- + {
- + SetTo(volume, id);
- + }
- +
- + Vnode()
- + :
- + fStatus(B_NO_INIT),
- + fInode(NULL)
- + {
- + }
- +
- + ~Vnode()
- + {
- + Unset();
- + }
- +
- + status_t InitCheck()
- + {
- + return fStatus;
- + }
- +
- + void Unset()
- + {
- + if (fInode != NULL) {
- + put_vnode(fInode->GetVolume()->FSVolume(), fInode->ID());
- + fInode = NULL;
- + fStatus = B_NO_INIT;
- + }
- + }
- +
- + status_t SetTo(Volume* volume, ino_t id)
- + {
- + Unset();
- +
- + return fStatus = get_vnode(volume->FSVolume(), id, (void**)&fInode);
- + }
- +
- + status_t Get(Inode** _inode)
- + {
- + *_inode = fInode;
- + return fStatus;
- + }
- +
- + void Keep()
- + {
- + fInode = NULL;
- + }
- +
- private:
- - rw_lock fLock;
- - ::Volume* fVolume;
- - ino_t fID;
- - void* fCache;
- - void* fMap;
- - ext2_inode* fNode;
- - ext2_xattr_header* fAttributesBlock;
- + status_t fStatus;
- + Inode* fInode;
- };
- #endif // INODE_H
- Index: src/add-ons/kernel/file_systems/ext2/Volume.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Volume.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/Volume.cpp (working copy)
- @@ -20,7 +20,10 @@
- #include <util/AutoLock.h>
- +#include "CachedBlock.h"
- #include "Inode.h"
- +#include "InodeJournal.h"
- +#include "NoJournal.h"
- //#define TRACE_EXT2
- @@ -199,7 +202,7 @@
- // TODO: check some more values!
- if (Magic() != (uint32)EXT2_SUPER_BLOCK_MAGIC)
- return false;
- -
- +
- return true;
- }
- @@ -210,6 +213,9 @@
- Volume::Volume(fs_volume* volume)
- :
- fFSVolume(volume),
- + fBlockAllocator(this),
- + fInodeAllocator(this),
- + fJournalInode(NULL),
- fFlags(0),
- fGroupBlocks(NULL),
- fRootNode(NULL)
- @@ -220,6 +226,7 @@
- Volume::~Volume()
- {
- + TRACE("Volume destructor.\n");
- if (fGroupBlocks != NULL) {
- uint32 blockCount = (fNumGroups + fGroupsPerBlock - 1)
- / fGroupsPerBlock;
- @@ -252,8 +259,14 @@
- status_t
- Volume::Mount(const char* deviceName, uint32 flags)
- {
- - flags |= B_MOUNT_READ_ONLY;
- + // flags |= B_MOUNT_READ_ONLY;
- // we only support read-only for now
- +
- + if ((flags & B_MOUNT_READ_ONLY) != 0) {
- + TRACE("Volume::Mount(): Read only\n");
- + } else {
- + TRACE("Volume::Mount(): Read write\n");
- + }
- DeviceOpener opener(deviceName, (flags & B_MOUNT_READ_ONLY) != 0
- ? O_RDONLY : O_RDWR);
- @@ -278,10 +291,17 @@
- fBlockSize = 1UL << fSuperBlock.BlockShift();
- fFirstDataBlock = fSuperBlock.FirstDataBlock();
- + fFreeBlocks = fSuperBlock.FreeBlocks();
- + fFreeInodes = fSuperBlock.FreeInodes();
- +
- + uint32 numBlocks = fSuperBlock.NumBlocks() - fFirstDataBlock;
- + uint32 blocksPerGroup = fSuperBlock.BlocksPerGroup();
- + fNumGroups = numBlocks / blocksPerGroup;
- + if (numBlocks % blocksPerGroup != 0)
- + fNumGroups++;
- +
- + fGroupsPerBlock = fBlockSize / sizeof(ext2_block_group);
- fNumInodes = fSuperBlock.NumInodes();
- - fNumGroups = (fSuperBlock.NumBlocks() - fFirstDataBlock - 1)
- - / fSuperBlock.BlocksPerGroup() + 1;
- - fGroupsPerBlock = fBlockSize / sizeof(ext2_block_group);
- TRACE("block size %ld, num groups %ld, groups per block %ld, first %lu\n",
- fBlockSize, fNumGroups, fGroupsPerBlock, fFirstDataBlock);
- @@ -309,7 +329,55 @@
- fBlockCache = opener.InitCache(NumBlocks(), fBlockSize);
- if (fBlockCache == NULL)
- return B_ERROR;
- +
- + TRACE("Volume::Mount(): Initialized block cache: %p\n", fBlockCache);
- + // initialize journal
- + if ((fSuperBlock.CompatibleFeatures() & EXT2_FEATURE_HAS_JOURNAL) != 0) {
- + // TODO: There should be a mount option to ignore the existent journal
- + if (fSuperBlock.JournalInode() != 0) {
- + fJournalInode = new(std::nothrow) Inode(this,
- + fSuperBlock.JournalInode());
- +
- + if (fJournalInode == NULL)
- + return B_NO_MEMORY;
- +
- + TRACE("Opening an on disk, inode mapped journal.\n");
- + fJournal = new(std::nothrow) InodeJournal(fJournalInode);
- + } else {
- + // TODO: external journal
- + TRACE("Can not open an external journal.\n");
- + return B_NOT_SUPPORTED;
- + }
- + } else {
- + TRACE("Opening a fake journal (NoJournal).\n");
- + fJournal = new(std::nothrow) NoJournal(this);
- + }
- +
- + if (fJournal == NULL) {
- + TRACE("No memory to create the journal\n");
- + return B_NO_MEMORY;
- + }
- +
- + status = fJournal->InitCheck();
- + if (status != B_OK)
- + return status;
- +
- + // TODO: Only recover if asked to
- + status = fJournal->Recover();
- + if (status != B_OK)
- + return status;
- +
- + status = fJournal->StartLog();
- + if (status != B_OK)
- + return status;
- +
- + // Initialize allocators
- + status = fBlockAllocator.Initialize();
- + if (status != B_OK)
- + return status;
- +
- + // ready
- status = get_vnode(fFSVolume, EXT2_ROOT_NODE, (void**)&fRootNode);
- if (status != B_OK) {
- TRACE("could not create root node: get_vnode() failed!\n");
- @@ -342,11 +410,22 @@
- status_t
- Volume::Unmount()
- {
- + TRACE("Volume::Unmount()\n");
- +
- + status_t status = fJournal->Deinit();
- +
- + delete fJournal;
- + delete fJournalInode;
- +
- + TRACE("Volume::Unmount(): Putting root node\n");
- put_vnode(fFSVolume, RootNode()->ID());
- + TRACE("Volume::Unmount(): Deleting the block cache\n");
- block_cache_delete(fBlockCache, !IsReadOnly());
- + TRACE("Volume::Unmount(): Closing device\n");
- close(fDevice);
- - return B_OK;
- + TRACE("Volume::Unmount(): Done\n");
- + return status;
- }
- @@ -443,6 +522,122 @@
- }
- +status_t
- +Volume::AllocateInode(Transaction& transaction, Inode* parent, int32 mode,
- + ino_t& id)
- +{
- + if (IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + status_t status = fInodeAllocator.New(transaction, parent, mode, id);
- + if (status == B_OK)
- + --fFreeInodes;
- +
- + return status;
- +}
- +
- +
- +status_t
- +Volume::AllocateBlocks(Transaction& transaction, uint32 minimum, uint32 maximum,
- + uint32& blockGroup, uint32& start, uint32& length)
- +{
- + TRACE("Volume::AllocateBlocks()\n");
- + if (IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + TRACE("Volume::AllocateBlocks(): Calling the block allocator\n");
- +
- + status_t status = fBlockAllocator.AllocateBlocks(transaction, minimum,
- + maximum, blockGroup, start, length);
- + if (status != B_OK)
- + return status;
- +
- + TRACE("Volume::AllocateBlocks(): Allocated %lu blocks\n", length);
- +
- + fFreeBlocks -= length;
- +
- + return WriteSuperBlock(transaction);
- +}
- +
- +
- +status_t
- +Volume::FreeBlocks(Transaction& transaction, uint32 start, uint32 length)
- +{
- + if (IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + status_t status = fBlockAllocator.Free(transaction, start, length);
- + if (status != B_OK)
- + return status;
- +
- + fFreeBlocks += length;
- +
- + return WriteSuperBlock(transaction);
- +}
- +
- +
- +status_t
- +Volume::LoadSuperBlock()
- +{
- + CachedBlock cached(this);
- + const uint8* block = cached.SetTo(fFirstDataBlock);
- +
- + if (block == NULL)
- + return B_IO_ERROR;
- +
- + if (fFirstDataBlock == 0)
- + memcpy(&fSuperBlock, block + 1024, sizeof(fSuperBlock));
- + else
- + memcpy(&fSuperBlock, block, sizeof(fSuperBlock));
- +
- + fFreeBlocks = fSuperBlock.FreeBlocks();
- + fFreeInodes = fSuperBlock.FreeInodes();
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Volume::WriteSuperBlock(Transaction& transaction)
- +{
- + TRACE("Volume::WriteSuperBlock()\n");
- + fSuperBlock.SetFreeBlocks(fFreeBlocks);
- + fSuperBlock.SetFreeInodes(fFreeInodes);
- + // TODO: Rest of fields that can be modified
- +
- + CachedBlock cached(this);
- + uint8* block = cached.SetToWritable(transaction, fFirstDataBlock);
- +
- + if (block == NULL)
- + return B_IO_ERROR;
- +
- + if (fFirstDataBlock == 0)
- + memcpy(block + 1024, &fSuperBlock, sizeof(fSuperBlock));
- + else
- + memcpy(block, &fSuperBlock, sizeof(fSuperBlock));
- +
- + TRACE("Volume::WriteSuperBlock(): Done\n");
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Volume::FlushDevice()
- +{
- + TRACE("Volume::FlushDevice(): %p, %p\n", this, fBlockCache);
- + return block_cache_sync(fBlockCache);
- +}
- +
- +
- +status_t
- +Volume::Sync()
- +{
- + TRACE("Volume::Sync()\n");
- + return fJournal->FlushLogAndBlocks();
- +}
- +
- +
- // #pragma mark - Disk scanning and initialization
- @@ -460,3 +655,18 @@
- ? B_OK : B_NOT_SUPPORTED;
- }
- +
- +void
- +Volume::TransactionDone(bool success)
- +{
- + status_t status = LoadSuperBlock();
- + if (status != B_OK)
- + panic("Failed to relead ext2 superblock.\n");
- +}
- +
- +
- +void
- +Volume::RemovedFromTransaction()
- +{
- + // TODO: Does it make a difference?
- +}
- Index: src/add-ons/kernel/file_systems/ext2/Journal.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Journal.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/Journal.cpp (revision 0)
- @@ -0,0 +1,1256 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "Journal.h"
- +
- +#include <new>
- +#include <string.h>
- +#include <unistd.h>
- +
- +#include <fs_cache.h>
- +
- +#include "CachedBlock.h"
- +#include "HashRevokeManager.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +class LogEntry : public DoublyLinkedListLinkImpl<LogEntry> {
- +public:
- + LogEntry(Journal* journal, uint32 logStart,
- + uint32 length);
- + ~LogEntry();
- +
- + uint32 Start() const { return fStart; }
- + uint32 CommitID() const { return fCommitID; }
- +
- + Journal* GetJournal() { return fJournal; }
- +
- +private:
- + Journal* fJournal;
- + uint32 fStart;
- + uint32 fCommitID;
- +};
- +
- +
- +LogEntry::LogEntry(Journal* journal, uint32 logStart, uint32 commitID)
- + :
- + fJournal(journal),
- + fStart(logStart),
- + fCommitID(commitID)
- +{
- +}
- +
- +
- +LogEntry::~LogEntry()
- +{
- +}
- +
- +
- +/*void
- +add_to_iovec(iovec* vecs, int32& index, int32 max, const void* address,
- + size_t size)
- +{
- + if (index > 0 && (addr_t)vecs[index - 1].iov_base
- + + vecs[index - 1].iov_len == (addr_t)address) {
- + // the iovec can be combined with the previous one
- + vecs[index - 1].iov_len += size;
- + return;
- + }
- +
- + if (index == max)
- + panic("no more space for iovecs!");
- +
- + // start a new iovec
- + vecs[index].iov_base = const_cast<void*>(address);
- + vecs[index].iov_len = size;
- + index++;
- +}*/
- +
- +
- +void
- +JournalHeader::MakeDescriptor(uint32 sequence)
- +{
- + this->magic = B_HOST_TO_BENDIAN_INT32(JOURNAL_MAGIC);
- + this->sequence = B_HOST_TO_BENDIAN_INT32(sequence);
- + this->block_type = B_HOST_TO_BENDIAN_INT32(JOURNAL_DESCRIPTOR_BLOCK);
- +}
- +
- +
- +void
- +JournalHeader::MakeCommit(uint32 sequence)
- +{
- + this->magic = B_HOST_TO_BENDIAN_INT32(JOURNAL_MAGIC);
- + this->sequence = B_HOST_TO_BENDIAN_INT32(sequence);
- + this->block_type = B_HOST_TO_BENDIAN_INT32(JOURNAL_COMMIT_BLOCK);
- +}
- +
- +
- +Journal::Journal(Volume* fsVolume, Volume* jVolume)
- + :
- + fJournalVolume(jVolume),
- + fJournalBlockCache(jVolume->BlockCache()),
- + fFilesystemVolume(fsVolume),
- + fFilesystemBlockCache(fsVolume->BlockCache()),
- + fRevokeManager(NULL),
- + fInitStatus(B_OK),
- + fBlockSize(sizeof(JournalSuperBlock)),
- + fFirstCommitID(0),
- + fFirstCacheCommitID(0),
- + fFirstLogBlock(1),
- + fLogSize(0),
- + fVersion(0),
- + fLogStart(0),
- + fLogEnd(0),
- + fFreeBlocks(0),
- + fMaxTransactionSize(0),
- + fCurrentCommitID(0),
- + fHasSubTransaction(false),
- + fSeparateSubTransactions(false),
- + fUnwrittenTransactions(0),
- + fTransactionID(0)
- +{
- + recursive_lock_init(&fLock, "ext2 journal");
- + mutex_init(&fLogEntriesLock, "ext2 journal log entries");
- +
- + HashRevokeManager* revokeManager = new(std::nothrow) HashRevokeManager;
- + TRACE("Journal::Journal(): Allocated a hash revoke manager at %p\n",
- + revokeManager);
- +
- + if (revokeManager == NULL)
- + fInitStatus = B_NO_MEMORY;
- + else {
- + fInitStatus = revokeManager->Init();
- +
- + if (fInitStatus == B_OK) {
- + fRevokeManager = revokeManager;
- + fInitStatus = _LoadSuperBlock();
- + }
- + }
- +}
- +
- +
- +Journal::Journal()
- + :
- + fJournalVolume(NULL),
- + fJournalBlockCache(NULL),
- + fFilesystemVolume(NULL),
- + fFilesystemBlockCache(NULL),
- + fRevokeManager(NULL),
- + fInitStatus(B_OK),
- + fBlockSize(sizeof(JournalSuperBlock)),
- + fFirstCommitID(0),
- + fFirstCacheCommitID(0),
- + fFirstLogBlock(1),
- + fLogSize(0),
- + fVersion(0),
- + fLogStart(0),
- + fLogEnd(0),
- + fFreeBlocks(0),
- + fMaxTransactionSize(0),
- + fCurrentCommitID(0),
- + fHasSubTransaction(false),
- + fSeparateSubTransactions(false),
- + fUnwrittenTransactions(0),
- + fTransactionID(0)
- +{
- + recursive_lock_init(&fLock, "ext2 journal");
- + mutex_init(&fLogEntriesLock, "ext2 journal log entries");
- +}
- +
- +
- +Journal::~Journal()
- +{
- + TRACE("Journal destructor.\n");
- +
- + TRACE("Journal::~Journal(): Attempting to delete revoke manager at %p\n",
- + fRevokeManager);
- + delete fRevokeManager;
- +
- + recursive_lock_destroy(&fLock);
- + mutex_destroy(&fLogEntriesLock);
- +}
- +
- +
- +status_t
- +Journal::InitCheck()
- +{
- + return fInitStatus;
- +}
- +
- +
- +status_t
- +Journal::Deinit()
- +{
- + return FlushLogAndBlocks();
- +}
- +
- +
- +/*virtual*/ status_t
- +Journal::StartLog()
- +{
- + fLogStart = fFirstLogBlock;
- + fLogEnd = fFirstLogBlock;
- + fFreeBlocks = 0;
- +
- + fCurrentCommitID = fFirstCommitID;
- + //fNextCommitID = fFirstCommitID;
- +
- + return _SaveSuperBlock();
- +}
- +
- +
- +status_t
- +Journal::RestartLog()
- +{
- + fFirstCommitID = 1;
- +
- + return B_OK;
- +}
- +
- +
- +/*virtual*/ status_t
- +Journal::Lock(Transaction* owner, bool separateSubTransactions)
- +{
- + TRACE("Journal::Lock()\n");
- + status_t status = recursive_lock_lock(&fLock);
- + if (status != B_OK)
- + return status;
- +
- + TRACE("Journal::Lock(): Aquired lock\n");
- +
- + if (!fSeparateSubTransactions && recursive_lock_get_recursion(&fLock) > 1) {
- + // reuse current transaction
- + TRACE("Journal::Lock(): Reusing current transaction\n");
- + return B_OK;
- + }
- +
- + if(separateSubTransactions)
- + fSeparateSubTransactions = true;
- +
- + if (owner != NULL)
- + owner->SetParent(fOwner);
- +
- + fOwner = owner;
- +
- + if (fOwner != NULL) {
- + if (fUnwrittenTransactions > 0) {
- + // start a sub transaction
- + TRACE("Journal::Lock(): Starting sub transaction\n");
- + cache_start_sub_transaction(fFilesystemBlockCache, fTransactionID);
- + fHasSubTransaction = true;
- + } else {
- + TRACE("Journal::Lock(): Starting new transaction\n");
- + fTransactionID = cache_start_transaction(fFilesystemBlockCache);
- + }
- +
- + if (fTransactionID < B_OK) {
- + recursive_lock_unlock(&fLock);
- + return fTransactionID;
- + }
- +
- + cache_add_transaction_listener(fFilesystemBlockCache, fTransactionID,
- + TRANSACTION_IDLE, _TransactionIdle, this);
- + }
- +
- + return B_OK;
- +}
- +
- +
- +/*virtual*/ status_t
- +Journal::Unlock(Transaction* owner, bool success)
- +{
- + TRACE("Journal::Unlock()\n");
- + if (fSeparateSubTransactions
- + || recursive_lock_get_recursion(&fLock) == 1) {
- + // we only end the transaction if we unlock it
- + TRACE("Journal::Unlock(): Last lock holder\n");
- + if (owner != NULL) {
- + TRACE("Journal::Unlock(): Calling _TransactionDone\n");
- + status_t status = _TransactionDone(success);
- + if (status != B_OK)
- + return status;
- +
- + bool separateSubTransactions = fSeparateSubTransactions;
- + fSeparateSubTransactions = true;
- + owner->NotifyListeners(success);
- + fSeparateSubTransactions = separateSubTransactions;
- +
- + fOwner = owner->Parent();
- + } else
- + fOwner = NULL;
- +
- + if (fSeparateSubTransactions
- + && recursive_lock_get_recursion(&fLock) == 1)
- + fSeparateSubTransactions = false;
- + } else
- + owner->MoveListenersTo(fOwner);
- +
- + recursive_lock_unlock(&fLock);
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::MapBlock(uint32 logical, uint32& physical)
- +{
- + TRACE("Journal::MapBlock()\n");
- + physical = logical;
- +
- + return B_OK;
- +}
- +
- +
- +inline uint32
- +Journal::FreeLogBlocks() const
- +{
- + TRACE("Journal::FreeLogBlocks(): start: %lu, end: %lu, size: %lu\n",
- + fLogStart, fLogEnd, fLogSize);
- + return fLogStart <= fLogEnd
- + ? fLogSize - fLogEnd + fLogStart - 1
- + : fLogStart - fLogEnd;
- +}
- +
- +
- +status_t
- +Journal::FlushLogAndBlocks()
- +{
- + return _FlushLog(true, true);
- +}
- +
- +
- +int32
- +Journal::TransactionID() const
- +{
- + return fTransactionID;
- +}
- +
- +
- +status_t
- +Journal::_WritePartialTransactionToLog(JournalHeader* descriptorBlock,
- + bool detached, uint8** _escapedData, uint32 &logBlock, off_t& blockNumber,
- + long& cookie, ArrayDeleter<uint8>& escapedDataDeleter, uint32& blockCount,
- + bool& finished)
- +{
- + TRACE("Journal::_WritePartialTransactionToLog()\n");
- +
- + uint32 descriptorBlockPos = logBlock;
- + uint8* escapedData = *_escapedData;
- +
- + JournalBlockTag* tag = (JournalBlockTag*)descriptorBlock->data;
- + JournalBlockTag* lastTag = (JournalBlockTag*)((uint8*)descriptorBlock
- + + fBlockSize - sizeof(JournalHeader));
- +
- + finished = false;
- + status_t status = B_OK;
- +
- + while (tag < lastTag && status == B_OK) {
- + tag->SetBlockNumber(blockNumber);
- + tag->SetFlags(0);
- +
- + CachedBlock data(fFilesystemVolume);
- + const JournalHeader* blockData = (JournalHeader*)data.SetTo(
- + blockNumber);
- + if (blockData == NULL) {
- + panic("Got a NULL pointer while iterating through transaction "
- + "blocks.\n");
- + return B_ERROR;
- + }
- +
- + void* finalData;
- +
- + if (blockData->CheckMagic()) {
- + // The journaled block starts with the magic value
- + // We must remove it to prevent confusion
- + TRACE("Journal::_WritePartialTransactionToLog(): Block starts with "
- + "magic number. Escaping it\n");
- + tag->SetEscapedFlag();
- +
- + if (escapedData == NULL) {
- + TRACE("Journal::_WritePartialTransactionToLog(): Allocating "
- + "space for escaped block (%lu)\n", fBlockSize);
- + escapedData = new(std::nothrow) uint8[fBlockSize];
- + if (escapedData == NULL) {
- + TRACE("Journal::_WritePartialTransactionToLof(): Failed to "
- + "allocate buffer for escaped data block\n");
- + return B_NO_MEMORY;
- + }
- + escapedDataDeleter.SetTo(escapedData);
- + *_escapedData = escapedData;
- +
- + ((int32*)escapedData)[0] = 0; // Remove magic
- + }
- +
- + memcpy(escapedData + 4, blockData->data, fBlockSize - 4);
- + finalData = escapedData;
- + } else
- + finalData = (void*)blockData;
- +
- + // TODO: use iovecs?
- +
- + logBlock = _WrapAroundLog(logBlock + 1);
- +
- + uint32 physicalBlock;
- + status = MapBlock(logBlock, physicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + off_t logOffset = physicalBlock * fBlockSize;
- +
- + TRACE("Journal::_WritePartialTransactionToLog(): Writing from memory: "
- + "%p, to disk: %ld\n", finalData, (long)logOffset);
- + size_t written = write_pos(fJournalVolume->Device(), logOffset,
- + finalData, fBlockSize);
- + if (written != fBlockSize) {
- + TRACE("Failed to write journal block.\n");
- + return B_IO_ERROR;
- + }
- +
- + TRACE("Journal::_WritePartialTransactionToLog(): Wrote a journal block "
- + "at: %lu\n", logBlock);
- +
- + blockCount++;
- + tag++;
- +
- + status = cache_next_block_in_transaction(fFilesystemBlockCache,
- + fTransactionID, detached, &cookie, &blockNumber, NULL, NULL);
- + }
- +
- + finished = status != B_OK;
- +
- + // Write descriptor block
- + --tag;
- + tag->SetLastTagFlag();
- +
- + uint32 physicalBlock;
- + status = MapBlock(descriptorBlockPos, physicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + off_t descriptorBlockOffset = physicalBlock * fBlockSize;
- +
- + TRACE("Journal::_WritePartialTransactionToLog(): Writing to: %ld\n",
- + (long)descriptorBlockOffset);
- + size_t written = write_pos(fJournalVolume->Device(),
- + descriptorBlockOffset, descriptorBlock, fBlockSize);
- + if (written != fBlockSize) {
- + TRACE("Failed to write journal descriptor block.\n");
- + return B_IO_ERROR;
- + }
- +
- + blockCount++;
- + logBlock = _WrapAroundLog(logBlock + 1);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::_WriteTransactionToLog()
- +{
- + TRACE("Journal::_WriteTransactionToLog()\n");
- + // Transaction enters the Flush state
- + bool detached = false;
- + TRACE("Journal::_WriteTransactionToLog(): Attempting to get transaction "
- + "size\n");
- + size_t size = _FullTransactionSize();
- + TRACE("Journal::_WriteTransactionToLog(): transaction size: %lu\n", size);
- +
- + if (size > fMaxTransactionSize) {
- + TRACE("Journal::_WriteTransactionToLog(): not enough free space "
- + "for the transaction. Attempting to free some space.\n");
- + size = _MainTransactionSize();
- + TRACE("Journal::_WriteTransactionToLog(): main transaction size: %lu\n",
- + size);
- +
- + if(fHasSubTransaction && size < fMaxTransactionSize) {
- + TRACE("Journal::_WriteTransactionToLog(): transaction doesn't fit, "
- + "but it can be separated\n");
- + detached = true;
- + } else {
- + // Error: transaction can't fit in log
- + panic("transaction too large (size: %lu, max size: %lu, log size: "
- + "%lu)\n", size, fMaxTransactionSize, fLogSize);
- + return B_BUFFER_OVERFLOW;
- + }
- + }
- +
- + TRACE("Journal::_WriteTransactionToLog(): free log blocks: %lu\n",
- + FreeLogBlocks());
- + if (size > FreeLogBlocks()) {
- + TRACE("Journal::_WriteTransactionToLog(): Syncing block cache\n");
- + cache_sync_transaction(fFilesystemBlockCache, fTransactionID);
- +
- + if (size > FreeLogBlocks()) {
- + panic("Transaction fits, but sync didn't result in enough"
- + "free space.\n\tGot %ld when at least %ld was expected.",
- + (long)FreeLogBlocks(), (long)size);
- + }
- + }
- +
- + TRACE("Journal::_WriteTransactionToLog(): finished managing space for "
- + "the transaction\n");
- +
- + fHasSubTransaction = false;
- +
- + // Prepare Descriptor block
- + TRACE("Journal::_WriteTransactionToLog(): attempting to allocate space for "
- + "the descriptor block, block size %lu\n", fBlockSize);
- + JournalHeader* descriptorBlock =
- + (JournalHeader*)new(std::nothrow) uint8[fBlockSize];
- + if (descriptorBlock == NULL) {
- + TRACE("Journal::_WriteTransactionToLog(): Failed to allocate a buffer "
- + "for the descriptor block\n");
- + return B_NO_MEMORY;
- + }
- + ArrayDeleter<uint8> descriptorBlockDeleter((uint8*)descriptorBlock);
- +
- + descriptorBlock->MakeDescriptor(fCurrentCommitID);
- +
- + // Prepare Commit block
- + TRACE("Journal::_WriteTransactionToLog(): attempting to allocate space for "
- + "the commit block, block size %lu\n", fBlockSize);
- + JournalHeader* commitBlock =
- + (JournalHeader*)new(std::nothrow) uint8[fBlockSize];
- + if (descriptorBlock == NULL) {
- + TRACE("Journal::_WriteTransactionToLog(): Failed to allocate a buffer "
- + "for the commit block\n");
- + return B_NO_MEMORY;
- + }
- + ArrayDeleter<uint8> commitBlockDeleter((uint8*)commitBlock);
- +
- + commitBlock->MakeCommit(fCurrentCommitID + 1);
- + memset(commitBlock->data, 0, fBlockSize - sizeof(JournalHeader));
- + // TODO: This probably isn't necessary
- +
- + uint8* escapedData = NULL;
- + ArrayDeleter<uint8> escapedDataDeleter;
- +
- + off_t blockNumber;
- + long cookie = 0;
- +
- + status_t status = cache_next_block_in_transaction(fFilesystemBlockCache,
- + fTransactionID, detached, &cookie, &blockNumber, NULL, NULL);
- + if (status != B_OK) {
- + TRACE("Journal::_WriteTransactionToLog(): Transaction has no blocks to
- + write\n");
- + return B_OK;
- + }
- +
- + uint32 blockCount = 0;
- +
- + uint32 logBlock = _WrapAroundLog(fLogEnd);
- +
- + bool finished = false;
- +
- + status = _WritePartialTransactionToLog(descriptorBlock, detached,
- + &escapedData, logBlock, blockNumber, cookie, escapedDataDeleter,
- + blockCount, finished);
- + if (!finished && status != B_OK)
- + return status;
- +
- + uint32 commitBlockPos = logBlock;
- +
- + while (!finished) {
- + descriptorBlock->IncrementSequence();
- +
- + status = _WritePartialTransactionToLog(descriptorBlock, detached,
- + &escapedData, logBlock, blockNumber, cookie, escapedDataDeleter,
- + blockCount, finished);
- + if (!finished && status != B_OK)
- + return status;
- +
- + // It is okay to write the commit blocks of the partial transactions
- + // as long as the commit block of the first partial transaction isn't
- + // written. When it recovery reaches where the first commit should be
- + // and doesn't find it, it considers it found the end of the log.
- +
- + uint32 physicalBlock;
- + status = MapBlock(logBlock, physicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + off_t logOffset = physicalBlock * fBlockSize;
- +
- + TRACE("Journal::_WriteTransactionToLog(): Writting commit block to "
- + "%ld\n", (long)logOffset);
- + off_t written = write_pos(fJournalVolume->Device(), logOffset,
- + commitBlock, fBlockSize);
- + if (written != fBlockSize) {
- + TRACE("Failed to write journal commit block.\n");
- + return B_IO_ERROR;
- + }
- +
- + commitBlock->IncrementSequence();
- + blockCount++;
- +
- + logBlock = _WrapAroundLog(logBlock + 1);
- + }
- +
- + // Transaction will enter the Commit state
- + uint32 physicalBlock;
- + status = MapBlock(commitBlockPos, physicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + off_t logOffset = physicalBlock * fBlockSize;
- +
- + TRACE("Journal::_WriteTansactionToLog(): Writing to: %ld\n",
- + (long)logOffset);
- + off_t written = write_pos(fJournalVolume->Device(), logOffset, commitBlock,
- + fBlockSize);
- + if (written != fBlockSize) {
- + TRACE("Failed to write journal commit block.\n");
- + return B_IO_ERROR;
- + }
- +
- + blockCount++;
- + fLogEnd = _WrapAroundLog(fLogEnd + blockCount);
- +
- + status = _SaveSuperBlock();
- +
- + // Transaction will enter Finished state
- + LogEntry *logEntry = new LogEntry(this, fLogEnd, fCurrentCommitID++);
- + TRACE("Journal::_WriteTransactionToLog(): Allocating log entry at %p\n", logEntry);
- + if (logEntry == NULL) {
- + panic("no memory to allocate log entries!");
- + return B_NO_MEMORY;
- + }
- +
- + mutex_lock(&fLogEntriesLock);
- + fLogEntries.Add(logEntry);
- + mutex_unlock(&fLogEntriesLock);
- +
- + if (detached) {
- + fTransactionID = cache_detach_sub_transaction(fFilesystemBlockCache,
- + fTransactionID, _TransactionWritten, logEntry);
- + fUnwrittenTransactions = 1;
- +
- + if (status == B_OK && _FullTransactionSize() > fLogSize) {
- + // If the transaction is too large after writing, there is no way to
- + // recover, so let this transaction fail.
- + dprintf("transaction too large (%d blocks, log size %d)!\n",
- + (int)_FullTransactionSize(), (int)fLogSize);
- + return B_BUFFER_OVERFLOW;
- + }
- + } else {
- + cache_end_transaction(fFilesystemBlockCache, fTransactionID,
- + _TransactionWritten, logEntry);
- + fUnwrittenTransactions = 0;
- + }
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::_SaveSuperBlock()
- +{
- + TRACE("Journal::_SaveSuperBlock()\n");
- + uint32 physicalBlock;
- + status_t status = MapBlock(0, physicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + off_t superblockPos = physicalBlock * fBlockSize;
- +
- + JournalSuperBlock superblock;
- + size_t bytesRead = read_pos(fJournalVolume->Device(), superblockPos,
- + &superblock, sizeof(superblock));
- +
- + if (bytesRead != sizeof(superblock))
- + return B_IO_ERROR;
- +
- + superblock.SetFirstCommitID(fFirstCommitID);
- + superblock.SetLogStart(fLogStart);
- +
- + TRACE("Journal::SaveSuperBlock(): Write to %ld\n", (long)superblockPos);
- + size_t bytesWritten = write_pos(fJournalVolume->Device(), superblockPos,
- + &superblock, sizeof(superblock));
- +
- + if (bytesWritten != sizeof(superblock))
- + return B_IO_ERROR;
- +
- + TRACE("Journal::_SaveSuperBlock(): Done\n");
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::_LoadSuperBlock()
- +{
- + TRACE("Journal::_LoadSuperBlock()\n");
- + uint32 superblockPos;
- +
- + status_t status = MapBlock(0, superblockPos);
- + if (status != B_OK)
- + return status;
- +
- + TRACE("Journal::_LoadSuperBlock(): super block physical block: %lu\n",
- + superblockPos);
- +
- + JournalSuperBlock superblock;
- + size_t bytesRead = read_pos(fJournalVolume->Device(), superblockPos
- + * fJournalVolume->BlockSize(), &superblock, sizeof(superblock));
- +
- + if (bytesRead != sizeof(superblock)) {
- + TRACE("Journal::_LoadSuperBlock(): failed to read superblock\n");
- + return B_IO_ERROR;
- + }
- +
- + if (!superblock.header.CheckMagic()) {
- + TRACE("Journal::_LoadSuperBlock(): Invalid superblock magic %lX\n",
- + superblock.header.Magic());
- + return B_BAD_VALUE;
- + }
- +
- + if (superblock.header.BlockType() == JOURNAL_SUPERBLOCK_V1) {
- + TRACE("Journal::_LoadSuperBlock(): Journal superblock version 1\n");
- + fVersion = 1;
- + } else if (superblock.header.BlockType() == JOURNAL_SUPERBLOCK_V2) {
- + TRACE("Journal::_LoadSuperBlock(): Journal superblock version 2\n");
- + fVersion = 2;
- + } else {
- + TRACE("Journal::_LoadSuperBlock(): Invalid superblock version\n");
- + return B_BAD_VALUE;
- + }
- +
- + if (fVersion >= 2) {
- + status = _CheckFeatures(&superblock);
- +
- + if (status != B_OK) {
- + TRACE("Journal::_LoadSuperBlock(): Unsupported features\n");
- + return status;
- + }
- + }
- +
- + fBlockSize = superblock.BlockSize();
- + fFirstCommitID = superblock.FirstCommitID();
- + fFirstLogBlock = superblock.FirstLogBlock();
- + fLogStart = superblock.LogStart();
- + fLogSize = superblock.NumBlocks();
- +
- + uint32 descriptorTags = (fBlockSize - sizeof(JournalHeader))
- + / sizeof(JournalBlockTag);
- + // Maximum tags per descriptor block
- + uint32 maxDescriptors = (fLogSize - 1) / (descriptorTags + 2);
- + // Maximum number of full journal transactions
- + fMaxTransactionSize = maxDescriptors * descriptorTags;
- + fMaxTransactionSize += (fLogSize - 1) - fMaxTransactionSize - 2;
- + // Maximum size of a "logical" transaction
- + // TODO: Why is "superblock.MaxTransactionBlocks();" zero?
- + //fFirstCacheCommitID = fFirstCommitID - fTransactionID /*+ 1*/;
- +
- + TRACE("Journal::_LoadSuperBlock(): block size: %lu, first commit id: %lu, "
- + "first log block: %lu, log start: %lu, log size: %lu, max transaction "
- + "size: %lu\n", fBlockSize, fFirstCommitID, fFirstLogBlock, fLogStart,
- + fLogSize, fMaxTransactionSize);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::_CheckFeatures(JournalSuperBlock* superblock)
- +{
- + if ((superblock->ReadOnlyCompatibleFeatures()
- + & ~JOURNAL_KNOWN_READ_ONLY_COMPATIBLE_FEATURES) != 0
- + || (superblock->IncompatibleFeatures()
- + & ~JOURNAL_KNOWN_INCOMPATIBLE_FEATURES) != 0)
- + return B_NOT_SUPPORTED;
- +
- + return B_OK;
- +}
- +
- +
- +uint32
- +Journal::_CountTags(JournalHeader* descriptorBlock)
- +{
- + uint32 count = 0;
- +
- + JournalBlockTag* tags = (JournalBlockTag*)descriptorBlock->data;
- + // Skip the header
- + JournalBlockTag* lastTag = (JournalBlockTag*)
- + (descriptorBlock + fBlockSize - sizeof(JournalBlockTag));
- +
- + while (tags < lastTag && (tags->Flags() & JOURNAL_FLAG_LAST_TAG) == 0) {
- + if ((tags->Flags() & JOURNAL_FLAG_SAME_UUID) == 0) {
- + // sizeof(UUID) = 16 = 2*sizeof(JournalBlockTag)
- + tags += 2; // Skip new UUID
- + }
- +
- + TRACE("Journal::_CountTags(): Tag block: %lu\n", tags->BlockNumber());
- +
- + tags++; // Go to next tag
- + count++;
- + }
- +
- + TRACE("Journal::_CountTags(): counted tags: %lu\n", count);
- +
- + return count;
- +}
- +
- +
- +/*virtual*/ status_t
- +Journal::Recover()
- +{
- + TRACE("Journal::Recover()\n");
- + if (fLogStart == 0) // Journal was cleanly unmounted
- + return B_OK;
- +
- + TRACE("Journal::Recover(): Journal needs recovery\n");
- +
- + uint32 lastCommitID;
- +
- + status_t status = _RecoverPassScan(lastCommitID);
- + if (status != B_OK)
- + return status;
- +
- + status = _RecoverPassRevoke(lastCommitID);
- + if (status != B_OK)
- + return status;
- +
- + return _RecoverPassReplay(lastCommitID);
- +}
- +
- +
- +// First pass: Find the end of the log
- +status_t
- +Journal::_RecoverPassScan(uint32& lastCommitID)
- +{
- + TRACE("Journal Recover: 1st Pass: Scan\n");
- +
- + CachedBlock cached(fJournalVolume);
- + JournalHeader* header;
- + uint32 nextCommitID = fFirstCommitID;
- + uint32 nextBlock = fLogStart;
- + uint32 nextBlockPos;
- +
- + status_t status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + header = (JournalHeader*)cached.SetTo(nextBlockPos);
- +
- + while (header->CheckMagic() && header->Sequence() == nextCommitID) {
- + uint32 blockType = header->BlockType();
- +
- + if (blockType == JOURNAL_DESCRIPTOR_BLOCK)
- + nextBlock += nextBlock - 1;
- + else if (blockType == JOURNAL_COMMIT_BLOCK)
- + nextCommitID++;
- + else if (blockType != JOURNAL_REVOKE_BLOCK) {
- + // TODO: Warn that we found an unrecognized block
- + break;
- + } // If blockType == JOURNAL_REVOKE_BLOCK we just skip it
- +
- + nextBlock = _WrapAroundLog(nextBlock + 1);
- +
- + status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + header = (JournalHeader*)cached.SetTo(nextBlockPos);
- + }
- +
- + TRACE("Journal Recovery pass scan: Last detected transaction ID: %lu\n",
- + nextCommitID);
- +
- + lastCommitID = nextCommitID;
- + return B_OK;
- +}
- +
- +
- +// Second pass: Collect all revoked blocks
- +status_t
- +Journal::_RecoverPassRevoke(uint32 lastCommitID)
- +{
- + TRACE("Journal Recover: 2nd Pass: Revoke\n");
- +
- + CachedBlock cached(fJournalVolume);
- + JournalHeader* header;
- + uint32 nextCommitID = fFirstCommitID;
- + uint32 nextBlock = fLogStart;
- + uint32 nextBlockPos;
- +
- + status_t status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + header = (JournalHeader*)cached.SetTo(nextBlockPos);
- +
- + while (nextCommitID < lastCommitID) {
- + if (!header->CheckMagic() || header->Sequence() != nextCommitID) {
- + // Somehow the log is different than the expexted
- + return B_ERROR;
- + }
- +
- + uint32 blockType = header->BlockType();
- +
- + if (blockType == JOURNAL_DESCRIPTOR_BLOCK)
- + nextBlock += _CountTags(header) - 1;
- + else if (blockType == JOURNAL_COMMIT_BLOCK)
- + nextCommitID++;
- + else if (blockType == JOURNAL_REVOKE_BLOCK) {
- + TRACE("Journal::_RecoverPassRevoke(): Found a revoke block\n");
- + status = fRevokeManager->ScanRevokeBlock(
- + (JournalRevokeHeader*)header, nextCommitID);
- +
- + if (status != B_OK)
- + return status;
- + } else {
- + // TODO: Warn that we found an unrecognized block
- + break;
- + }
- +
- + nextBlock = _WrapAroundLog(nextBlock + 1);
- +
- + status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + header = (JournalHeader*)cached.SetTo(nextBlockPos);
- + }
- +
- + if (nextCommitID != lastCommitID) {
- + // Possibly because of some sort of IO error
- + TRACE("Journal::_RecoverPassRevoke(): Incompatible commit IDs\n");
- + return B_ERROR;
- + }
- +
- + TRACE("Journal recovery pass revoke: Revoked blocks: %lu\n",
- + fRevokeManager->NumRevokes());
- +
- + return B_OK;
- +}
- +
- +
- +// Third pass: Replay log
- +status_t
- +Journal::_RecoverPassReplay(uint32 lastCommitID)
- +{
- + TRACE("Journal Recover: 3rd Pass: Replay\n");
- +
- + uint32 nextCommitID = fFirstCommitID;
- + uint32 nextBlock = fLogStart;
- + uint32 nextBlockPos;
- +
- + status_t status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + CachedBlock cached(fJournalVolume);
- + JournalHeader* header = (JournalHeader*)cached.SetTo(nextBlockPos);
- +
- + int count = 0;
- +
- + uint8* data = new(std::nothrow) uint8[fBlockSize];
- + if (data == NULL) {
- + TRACE("Journal::_RecoverPassReplay(): Failed to allocate memory for "
- + "data\n");
- + return B_NO_MEMORY;
- + }
- +
- + ArrayDeleter<uint8> dataDeleter(data);
- +
- + while (nextCommitID < lastCommitID) {
- + if (!header->CheckMagic() || header->Sequence() != nextCommitID) {
- + // Somehow the log is different than the expexted
- + TRACE("Journal::_RecoverPassReplay(): Wierd problem with block\n");
- + return B_ERROR;
- + }
- +
- + uint32 blockType = header->BlockType();
- +
- + if (blockType == JOURNAL_DESCRIPTOR_BLOCK) {
- + JournalBlockTag* last_tag = (JournalBlockTag*)((uint8*)header
- + + fBlockSize - sizeof(JournalBlockTag));
- +
- + for (JournalBlockTag* tag = (JournalBlockTag*)header->data;
- + tag <= last_tag; ++tag) {
- + nextBlock = _WrapAroundLog(nextBlock + 1);
- +
- + status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + if (!fRevokeManager->Lookup(tag->BlockNumber(),
- + nextCommitID)) {
- + // Block isn't revoked
- + size_t read = read_pos(fJournalVolume->Device(),
- + nextBlockPos * fBlockSize, data, fBlockSize);
- + if (read != fBlockSize)
- + return B_IO_ERROR;
- +
- + if ((tag->Flags() & JOURNAL_FLAG_ESCAPED) != 0) {
- + // Block is escaped
- + ((int32*)data)[0]
- + = B_HOST_TO_BENDIAN_INT32(JOURNAL_MAGIC);
- + }
- +
- + TRACE("Journal::_RevoverPassReplay(): Write to %lu\n",
- + tag->BlockNumber() * fBlockSize);
- + size_t written = write_pos(fFilesystemVolume->Device(),
- + tag->BlockNumber() * fBlockSize, data, fBlockSize);
- +
- + if (written != fBlockSize)
- + return B_IO_ERROR;
- +
- + ++count;
- + }
- +
- + if ((tag->Flags() & JOURNAL_FLAG_LAST_TAG) != 0)
- + break;
- + if ((tag->Flags() & JOURNAL_FLAG_SAME_UUID) == 0) {
- + // TODO: Check new UUID with file system UUID
- + tag += 2;
- + // sizeof(JournalBlockTag) = 8
- + // sizeof(UUID) = 16
- + }
- + }
- + }
- + else if (blockType == JOURNAL_COMMIT_BLOCK)
- + nextCommitID++;
- + else if (blockType != JOURNAL_REVOKE_BLOCK) {
- + // TODO: Warn that we found an unrecognized block
- + break;
- + } // If blockType == JOURNAL_REVOKE_BLOCK we just skip it
- +
- + nextBlock = _WrapAroundLog(nextBlock + 1);
- +
- + status = MapBlock(nextBlock, nextBlockPos);
- + if (status != B_OK)
- + return status;
- +
- + header = (JournalHeader*)cached.SetTo(nextBlockPos);
- + }
- +
- + if (nextCommitID != lastCommitID) {
- + // Possibly because of some sort of IO error
- + return B_ERROR;
- + }
- +
- + TRACE("Journal recovery pass replay: Replayed blocks: %u\n", count);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Journal::_FlushLog(bool canWait, bool flushBlocks)
- +{
- + TRACE("Journal::_FlushLog()\n");
- + status_t status = canWait ? recursive_lock_lock(&fLock)
- + : recursive_lock_trylock(&fLock);
- + if (status != B_OK)
- + return status;
- +
- + TRACE("Journal::_FlushLog(): Acquired fLock, recursion: %ld\n",
- + recursive_lock_get_recursion(&fLock));
- +
- + if (recursive_lock_get_recursion(&fLock) > 1) {
- + // Called from inside a transaction
- + recursive_lock_unlock(&fLock);
- + TRACE("Journal::_FlushLog(): Called from a transaction. Leaving...\n");
- + return B_OK;
- + }
- +
- + if (fUnwrittenTransactions != 0 && _FullTransactionSize() != 0) {
- + status = _WriteTransactionToLog();
- + if (status < B_OK)
- + panic("Failed flushing transaction: %s\n", strerror(status));
- + }
- +
- + TRACE("Journal::_FlushLog(): Attempting to flush journal volume at %p\n",
- + fJournalVolume);
- +
- + // TODO: Not sure this is correct. Need to review...
- + // NOTE: Not correct. Causes double lock of a block cache mutex
- + // TODO: Need some other way to synchronize the journal...
- + /*status = fJournalVolume->FlushDevice();
- + if (status != B_OK)
- + return status;*/
- +
- + TRACE("Journal::_FlushLog(): Flushed journal volume\n");
- +
- + if (flushBlocks) {
- + TRACE("Journal::_FlushLog(): Attempting to flush file system volume "
- + "at %p\n", fFilesystemVolume);
- + status = fFilesystemVolume->FlushDevice();
- + if (status == B_OK)
- + TRACE("Journal::_FlushLog(): Flushed file system volume\n");
- + }
- +
- + TRACE("Journal::_FlushLog(): Finished. Releasing lock\n");
- +
- + recursive_lock_unlock(&fLock);
- +
- + TRACE("Journal::_FlushLog(): Done, final status: %s\n", strerror(status));
- + return status;
- +}
- +
- +
- +inline uint32
- +Journal::_WrapAroundLog(uint32 block)
- +{
- + TRACE("Journal::_WrapAroundLog()\n");
- + if (block >= fLogSize)
- + return block - fLogSize + fFirstLogBlock;
- + else
- + return block;
- +}
- +
- +
- +size_t
- +Journal::_CurrentTransactionSize() const
- +{
- + TRACE("Journal::_CurrentTransactionSize(): transaction %ld\n",
- + fTransactionID);
- +
- + size_t count;
- +
- + if (fHasSubTransaction) {
- + count = cache_blocks_in_sub_transaction(fFilesystemBlockCache,
- + fTransactionID);
- +
- + TRACE("\tSub transaction size: %ld\n", count);
- + } else {
- + count = cache_blocks_in_transaction(fFilesystemBlockCache,
- + fTransactionID);
- +
- + TRACE("\tTransaction size: %ld\n", count);
- + }
- +
- + return count;
- +}
- +
- +
- +size_t
- +Journal::_FullTransactionSize() const
- +{
- + TRACE("Journal::_FullTransactionSize(): transaction %ld\n", fTransactionID);
- + TRACE("\tFile sytem block cache: %p\n", fFilesystemBlockCache);
- +
- + size_t count = cache_blocks_in_transaction(fFilesystemBlockCache,
- + fTransactionID);
- +
- + TRACE("\tFull transaction size: %ld\n", count);
- +
- + return count;
- +}
- +
- +
- +size_t
- +Journal::_MainTransactionSize() const
- +{
- + TRACE("Journal::_MainTransactionSize(): transaction %ld\n", fTransactionID);
- +
- + size_t count = cache_blocks_in_main_transaction(fFilesystemBlockCache,
- + fTransactionID);
- +
- + TRACE("\tMain transaction size: %ld\n", count);
- +
- + return count;
- +}
- +
- +
- +status_t
- +Journal::_TransactionDone(bool success)
- +{
- + if (!success) {
- + if (fHasSubTransaction) {
- + TRACE("Journal::_TransactionDone(): transaction %ld failed, "
- + "aborting subtransaction\n", fTransactionID);
- + cache_abort_sub_transaction(fFilesystemBlockCache, fTransactionID);
- + // parent is unaffected
- + } else {
- + TRACE("Journal::_TransactionDone(): transaction %ld failed,"
- + " aborting\n", fTransactionID);
- + cache_abort_transaction(fFilesystemBlockCache, fTransactionID);
- + fUnwrittenTransactions = 0;
- + }
- +
- + return B_OK;
- + }
- +
- + // If possible, delay flushing the transaction
- + uint32 size = _FullTransactionSize();
- + TRACE("Journal::_TransactionDone(): full transaction size: %lu, max "
- + "transaction size: %lu, free log blocks: %lu\n", size,
- + fMaxTransactionSize, FreeLogBlocks());
- + if (fMaxTransactionSize > 0 && size < fMaxTransactionSize) {
- + TRACE("Journal::_TransactionDone(): delaying flush of transaction "
- + "%ld\n", fTransactionID);
- +
- + // Make sure the transaction fits in the log
- + if (size < FreeLogBlocks())
- + cache_sync_transaction(fFilesystemBlockCache, fTransactionID);
- +
- + fUnwrittenTransactions++;
- + return B_OK;
- + }
- +
- + return _WriteTransactionToLog();
- +}
- +
- +
- +/*static*/ void
- +Journal::_TransactionWritten(int32 transactionID, int32 event, void* _logEntry)
- +{
- + LogEntry* logEntry = (LogEntry*)_logEntry;
- +
- + TRACE("Journal::_TransactionWritten(): Transaction %ld checkpointed\n",
- + transactionID);
- +
- + Journal* journal = logEntry->GetJournal();
- +
- + TRACE("Journal::_TransactionWritten(): log entry: %p, journal: %p\n",
- + logEntry, journal);
- + TRACE("Journal::_TransactionWritten(): log entries: %p\n",
- + &journal->fLogEntries);
- +
- + mutex_lock(&journal->fLogEntriesLock);
- +
- + TRACE("Journal::_TransactionWritten(): first log entry: %p\n",
- + journal->fLogEntries.First());
- + if (logEntry == journal->fLogEntries.First()) {
- + TRACE("Journal::_TransactionWritten(): Moving start of log to %lu\n",
- + logEntry->Start());
- + journal->fLogStart = logEntry->Start();
- + journal->fFirstCommitID = logEntry->CommitID();
- + TRACE("Journal::_TransactionWritten(): Setting commit ID to %lu\n",
- + logEntry->CommitID());
- +
- + if (journal->_SaveSuperBlock() != B_OK)
- + panic("ext2: Failed to write journal superblock\n");
- + }
- +
- + TRACE("Journal::_TransactionWritten(): Removing log entry\n");
- + journal->fLogEntries.Remove(logEntry);
- +
- + TRACE("Journal::_TransactionWritten(): Unlocking entries list\n");
- + mutex_unlock(&journal->fLogEntriesLock);
- +
- + TRACE("Journal::_TransactionWritten(): Deleting log entry at %p\n", logEntry);
- + delete logEntry;
- +}
- +
- +
- +/*static*/ void
- +Journal::_TransactionIdle(int32 transactionID, int32 event, void* _journal)
- +{
- + Journal* journal = (Journal*)_journal;
- + journal->_FlushLog(false, false);
- +}
- Property changes on: src/add-ons/kernel/file_systems/ext2/Journal.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/NoJournal.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/NoJournal.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/NoJournal.h (revision 0)
- @@ -0,0 +1,34 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef NOJOURNAL_H
- +#define NOJOURNAL_H
- +
- +
- +#include "Journal.h"
- +
- +
- +class NoJournal : public Journal {
- +public:
- + NoJournal(Volume* volume);
- + ~NoJournal();
- +
- + status_t InitCheck();
- + status_t Recover();
- + status_t StartLog();
- +
- + status_t Lock(Transaction* owner, bool separateSubTransactions);
- + status_t Unlock(Transaction* owner, bool success);
- +
- +private:
- + status_t _WriteTransactionToLog();
- +
- + static void _TransactionWritten(int32 transactionID,
- + int32 event, void* param);
- +};
- +
- +#endif // NOJOURNAL_H
- Index: src/add-ons/kernel/file_systems/ext2/HTree.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HTree.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/HTree.h (working copy)
- @@ -9,8 +9,6 @@
- #define HTREE_H
- -#include <AutoDeleter.h>
- -
- #include "ext2.h"
- #include "DirectoryIterator.h"
- #include "HTreeEntryIterator.h"
- @@ -26,14 +24,14 @@
- struct HTreeFakeDirEntry {
- - uint32 inode_num;
- + uint32 inode_id;
- uint16 entry_length;
- uint8 name_length;
- uint8 file_type;
- char file_name[0];
- uint32 Inode()
- - { return B_LENDIAN_TO_HOST_INT32(inode_num); }
- + { return B_LENDIAN_TO_HOST_INT32(inode_id); }
- } _PACKED;
- struct HTreeCountLimit {
- @@ -41,9 +39,15 @@
- uint16 count;
- uint16 Limit() const
- - { return B_LENDIAN_TO_HOST_INT32(limit); }
- + { return B_LENDIAN_TO_HOST_INT16(limit); }
- uint16 Count() const
- - { return B_LENDIAN_TO_HOST_INT32(count); }
- + { return B_LENDIAN_TO_HOST_INT16(count); }
- +
- + void SetLimit(uint16 value)
- + { limit = B_HOST_TO_LENDIAN_INT16(value); }
- +
- + void SetCount(uint16 value)
- + { count = B_HOST_TO_LENDIAN_INT16(value); }
- } _PACKED;
- struct HTreeEntry {
- @@ -54,6 +58,12 @@
- { return B_LENDIAN_TO_HOST_INT32(hash); }
- uint32 Block() const
- { return B_LENDIAN_TO_HOST_INT32(block); }
- +
- + void SetHash(uint32 newHash)
- + { hash = B_HOST_TO_LENDIAN_INT32(newHash); }
- +
- + void SetBlock(uint32 newBlock)
- + { block = B_HOST_TO_LENDIAN_INT32(newBlock); }
- } _PACKED;
- struct HTreeRoot {
- @@ -67,6 +77,8 @@
- uint8 root_info_length;
- uint8 indirection_levels;
- uint8 flags;
- +
- + HTreeCountLimit count_limit[0];
- bool IsValid() const;
- // Implemented in HTree.cpp
- @@ -94,17 +106,21 @@
- HTree(Volume* volume, Inode* directory);
- ~HTree();
- + status_t PrepareForHash();
- + uint32 Hash(const char* name, uint8 length);
- +
- status_t Lookup(const char* name,
- DirectoryIterator** directory);
- + static status_t InitDir(Transaction& transaction, Inode* inode,
- + Inode* parent);
- +
- private:
- status_t _LookupInNode(uint32 hash, off_t& firstEntry,
- off_t& lastEntry,
- uint32 remainingIndirects);
- - uint32 _Hash(const char* name, uint8 version);
- -
- - uint32 _HashLegacy(const char* name);
- + uint32 _HashLegacy(const char* name, uint8 length);
- inline uint32 _MD4F(uint32 x, uint32 y, uint32 z);
- inline uint32 _MD4G(uint32 x, uint32 y, uint32 z);
- @@ -113,21 +129,24 @@
- uint32& c, uint32& d);
- void _HalfMD4Transform(uint32 buffer[4],
- uint32 blocks[8]);
- - uint32 _HashHalfMD4(const char* name);
- + uint32 _HashHalfMD4(const char* name, uint8 length);
- void _TEATransform(uint32 buffer[4],
- uint32 blocks[4]);
- - uint32 _HashTEA(const char* name);
- + uint32 _HashTEA(const char* name, uint8 length);
- void _PrepareBlocksForHash(const char* string,
- - int length, uint32* blocks, int numBlocks);
- + uint32 length, uint32* blocks, uint32 numBlocks);
- + inline status_t _FallbackToLinearIteration(
- + DirectoryIterator** iterator);
- +
- bool fIndexed;
- uint32 fBlockSize;
- Inode* fDirectory;
- uint32 fHashSeed[4];
- HTreeEntryIterator* fRootEntry;
- - ObjectDeleter<HTreeEntryIterator> fRootDeleter;
- + uint8 fHashVersion;
- };
- #endif // HTREE_H
- Property changes on: src/add-ons/kernel/file_systems/ext2/HTree.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.cpp (working copy)
- @@ -1,75 +0,0 @@
- -/*
- - * Copyright 2010, Haiku Inc. All rights reserved.
- - * This file may be used under the terms of the MIT License.
- - *
- - * Authors:
- - * Janito V. Ferreira Filho
- - */
- -
- -
- -#include "IndexedDirectoryIterator.h"
- -
- -#include "ext2.h"
- -#include "HTree.h"
- -#include "HTreeEntryIterator.h"
- -#include "Inode.h"
- -
- -
- -//#define TRACE_EXT2
- -#ifdef TRACE_EXT2
- -# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- -#else
- -# define TRACE(x...) ;
- -#endif
- -
- -
- -IndexedDirectoryIterator::IndexedDirectoryIterator(off_t start,
- - uint32 blockSize, Inode* directory, HTreeEntryIterator* parent)
- - :
- - DirectoryIterator(directory),
- - fIndexing(true),
- -
- - fParent(parent),
- - fMaxOffset(start + blockSize),
- - fBlockSize(blockSize),
- - fMaxAttempts(0)
- -{
- - fOffset = start;
- -}
- -
- -
- -IndexedDirectoryIterator::~IndexedDirectoryIterator()
- -{
- -}
- -
- -
- -status_t
- -IndexedDirectoryIterator::GetNext(char* name, size_t* nameLength, ino_t* id)
- -{
- - if (fIndexing && fOffset + sizeof(HTreeFakeDirEntry) >= fMaxOffset) {
- - TRACE("IndexedDirectoryIterator::GetNext() calling next block\n");
- - status_t status = fParent->GetNext(fOffset);
- - if (status != B_OK)
- - return status;
- -
- - if (fMaxAttempts++ > 4)
- - return B_ERROR;
- -
- - fMaxOffset = fOffset + fBlockSize;
- - }
- -
- - return DirectoryIterator::GetNext(name, nameLength, id);
- -}
- -
- -
- -status_t
- -IndexedDirectoryIterator::Rewind()
- -{
- - // The only way to rewind it is too loose indexing
- -
- - fOffset = 0;
- - fMaxOffset = fInode->Size();
- - fIndexing = false;
- -
- - return B_OK;
- -}
- Index: src/add-ons/kernel/file_systems/ext2/DirectoryIterator.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/DirectoryIterator.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/DirectoryIterator.h (working copy)
- @@ -6,28 +6,68 @@
- #define DIRECTORY_ITERATOR_H
- +#include <AutoDeleter.h>
- #include <SupportDefs.h>
- +#include "Transaction.h"
- +
- +class HTreeEntryIterator;
- class Inode;
- class DirectoryIterator {
- public:
- - DirectoryIterator(Inode* inode);
- - virtual ~DirectoryIterator();
- + DirectoryIterator(Inode* inode, off_t start = 0,
- + HTreeEntryIterator* parent = NULL);
- + ~DirectoryIterator();
- - virtual status_t GetNext(char* name, size_t* _nameLength, ino_t* id);
- + status_t InitCheck();
- - virtual status_t Rewind();
- + status_t Next();
- + status_t Get(char* name, size_t* _nameLength, ino_t* id);
- +
- + status_t Rewind();
- +
- + status_t AddEntry(Transaction& transaction, const char* name,
- + size_t nameLength, ino_t id);
- + status_t FindEntry(const char* name, ino_t* id = NULL);
- + status_t RemoveEntry(Transaction& transaction);
- +
- private:
- DirectoryIterator(const DirectoryIterator&);
- DirectoryIterator &operator=(const DirectoryIterator&);
- // no implementation
- +
- protected:
- - Inode* fInode;
- - off_t fOffset;
- + status_t _AllocateBestEntryInBlock(uint8 nameLength, uint16& pos,
- + uint16& newLength);
- + status_t _AddEntry(Transaction& transaction, const char* name,
- + uint8 nameLength, ino_t id, uint16 newLength,
- + uint16 pos, bool hasPrevious = true);
- + status_t _SplitIndexedBlock(Transaction& transaction,
- + const char* name, uint8 nameLength, ino_t id,
- + bool firstSplit = false);
- +
- + status_t _NextBlock();
- +
- +
- + Inode* fDirectory;
- + Volume* fVolume;
- + uint32 fBlockSize;
- + HTreeEntryIterator* fParent;
- + bool fIndexing;
- +
- + uint32 fLogicalBlock;
- + uint32 fPhysicalBlock;
- + uint32 fDisplacement;
- + uint32 fPreviousDisplacement;
- +
- + ObjectDeleter<HTreeEntryIterator> fParentDeleter;
- +
- + status_t fInitStatus;
- };
- #endif // DIRECTORY_ITERATOR_H
- +
- Index: src/add-ons/kernel/file_systems/ext2/RevokeManager.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/RevokeManager.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/RevokeManager.cpp (revision 0)
- @@ -0,0 +1,51 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "RevokeManager.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +RevokeManager::RevokeManager()
- + :
- + fRevokeCount(0)
- +{
- +}
- +
- +
- +RevokeManager::~RevokeManager()
- +{
- +}
- +
- +
- +status_t
- +RevokeManager::ScanRevokeBlock(JournalRevokeHeader* revokeBlock, uint32 commitID)
- +{
- + TRACE("RevokeManager::ScanRevokeBlock(): Commit ID: %lu\n", commitID);
- + int count = revokeBlock->NumBytes() >> 3;
- +
- + for (int i = 0; i < count; ++i) {
- + TRACE("RevokeManager::ScanRevokeBlock(): Found a revoke block: %lu\n",
- + revokeBlock->RevokeBlock(i));
- + status_t status = Insert(revokeBlock->RevokeBlock(i), commitID);
- +
- + if (status != B_OK) {
- + TRACE("RevokeManager::ScanRevokeBlock(): Error inserting\n");
- + return status;
- + }
- + }
- +
- + return B_OK;
- +}
- +
- Property changes on: src/add-ons/kernel/file_systems/ext2/RevokeManager.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/Jamfile
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Jamfile (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/Jamfile (working copy)
- @@ -7,6 +7,7 @@
- }
- #UsePrivateHeaders [ FDirName kernel disk_device_manager ] ;
- +UsePrivateHeaders [ FDirName kernel util ] ;
- UsePrivateHeaders shared storage ;
- UsePrivateKernelHeaders ;
- @@ -15,9 +16,17 @@
- Inode.cpp
- AttributeIterator.cpp
- DirectoryIterator.cpp
- - IndexedDirectoryIterator.cpp
- HTree.cpp
- HTreeEntryIterator.cpp
- + RevokeManager.cpp
- + HashRevokeManager.cpp
- + Journal.cpp
- + NoJournal.cpp
- + InodeJournal.cpp
- + Transaction.cpp
- + BitmapBlock.cpp
- + BlockAllocator.cpp
- + InodeAllocator.cpp
- kernel_interface.cpp
- ;
- Index: src/add-ons/kernel/file_systems/ext2/BitmapBlock.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/BitmapBlock.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/BitmapBlock.cpp (revision 0)
- @@ -0,0 +1,639 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "BitmapBlock.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +BitmapBlock::BitmapBlock(Volume* volume, uint32 numBits)
- + :
- + CachedBlock(volume),
- + fData(NULL),
- + fReadOnlyData(NULL),
- + fNumBits(numBits)
- +{
- + TRACE("BitmapBlock::BitmapBlock(): num bits: %lu\n", fNumBits);
- +}
- +
- +
- +BitmapBlock::~BitmapBlock()
- +{
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::SetTo(uint32 block)
- +{
- + fData = NULL;
- + fReadOnlyData = (uint32*)CachedBlock::SetTo(block);
- +
- + return fReadOnlyData != NULL;
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::SetToWritable(Transaction& transaction, uint32 block, bool empty)
- +{
- + fReadOnlyData = NULL;
- + fData = (uint32*)CachedBlock::SetToWritable(transaction, block, empty);
- +
- + return fData != NULL;
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::CheckUnmarked(uint32 start, uint32 length)
- +{
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return false;
- +
- + if (start + length > fNumBits)
- + return false;
- +
- + uint32 startIndex = start >> 5;
- + uint32 startBit = start & 0x1F;
- + uint32 remainingBits = (length - startBit) & 0x1F;
- +
- + uint32 iterations;
- +
- + if (length < 32) {
- + if (startBit + length < 32) {
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[startIndex]);
- +
- + uint32 mask = (1 << startBit + length) - 1;
- + mask &= ~((1 << startBit) - 1);
- +
- + return (bits & mask) == 0;
- + } else
- + iterations = 0;
- + } else
- + iterations = (length - 32 + startBit) >> 5;
- +
- + uint32 index = startIndex;
- + uint32 mask = 0;
- +
- + if (startBit != 0) {
- + mask = ~((1 << startBit) - 1);
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- +
- + if ((bits & mask) != 0)
- + return false;
- +
- + index += 1;
- + }
- +
- + for (; iterations > 0; --iterations) {
- + if (data[index++] != 0)
- + return false;
- + }
- +
- + if (remainingBits != 0) {
- + mask = (1 << remainingBits + 1) - 1;
- +
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + if ((bits & mask) != 0)
- + return false;
- + }
- +
- + return true;
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::CheckMarked(uint32 start, uint32 length)
- +{
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return false;
- +
- + if (start + length > fNumBits)
- + return false;
- +
- + uint32 startIndex = start >> 5;
- + uint32 startBit = start & 0x1F;
- + uint32 remainingBits = (length - startBit) & 0x1F;
- +
- + uint32 iterations;
- +
- + if (length < 32) {
- + if (startBit + length < 32) {
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[startIndex]);
- +
- + uint32 mask = (1 << startBit + length) - 1;
- + mask &= ~((1 << startBit) - 1);
- +
- + return (bits & mask) != 0;
- + } else
- + iterations = 0;
- + } else
- + iterations = (length - 32 + startBit) >> 5;
- +
- + uint32 index = startIndex;
- + uint32 mask = 0;
- +
- + if (startBit != 0) {
- + mask = ~((1 << startBit) - 1);
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- +
- + if ((bits & mask) != mask)
- + return false;
- +
- + index += 1;
- + }
- +
- + mask = 0xFFFFFFFF;
- + for (; iterations > 0; --iterations) {
- + if (data[index++] != mask)
- + return false;
- + }
- +
- + if (remainingBits != 0) {
- + mask = (1 << remainingBits + 1) - 1;
- + uint32 bits = B_HOST_TO_LENDIAN_INT32(data[index]);
- +
- + if ((bits & mask) != mask)
- + return false;
- + }
- +
- + return true;
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::Mark(uint32 start, uint32 length, bool force)
- +{
- + if (fData == NULL || start + length > fNumBits)
- + return false;
- +
- + uint32 startIndex = start >> 5;
- + uint32 startBit = start & 0x1F;
- + uint32 remainingBits = (length - 32 + startBit) & 0x1F;
- +
- + uint32 iterations;
- +
- + if (length < 32) {
- + if (startBit + length < 32) {
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[startIndex]);
- +
- + uint32 mask = (1 << startBit + length) - 1;
- + mask &= ~((1 << startBit) - 1);
- +
- + if ((bits & mask) != 0)
- + return false;
- +
- + bits |= mask;
- +
- + fData[startIndex] = B_HOST_TO_LENDIAN_INT32(bits);
- +
- + return true;
- + } else
- + iterations = 0;
- + } else
- + iterations = (length - 32 + startBit) >> 5;
- +
- + uint32 index = startIndex;
- + uint32 mask = 0;
- +
- + TRACE("BitmapBlock::Mark(): start: %lu, length: %lu, startIndex: %lu, "
- + "startBit: %lu, iterations: %lu, remainingBits: %lu\n", start, length,
- + startIndex, startBit, iterations, remainingBits);
- +
- + if (startBit != 0) {
- + mask = ~((1 << startBit) - 1);
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[index]);
- +
- + TRACE("BitmapBlock::Mark(): mask: %lX, bits: %lX\n", mask, bits);
- +
- + if (!force && (bits & mask) != 0)
- + return false;
- +
- + bits |= mask;
- + fData[index] = B_HOST_TO_LENDIAN_INT32(bits);
- +
- + index += 1;
- + }
- +
- + mask = 0xFFFFFFFF;
- + for (; iterations > 0; --iterations) {
- + if (!force && fData[index] != 0)
- + return false;
- + fData[index++] |= mask;
- + }
- +
- + if (remainingBits != 0) {
- + mask = (1 << remainingBits) - 1;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[index]);
- + TRACE("BitmapBlock::(): marking remaining %lu bits: %lX, mask: %lX\n",
- + remainingBits, bits, mask);
- +
- + if (!force && (bits & mask) != 0)
- + return false;
- +
- + bits |= mask;
- + fData[index] = B_HOST_TO_LENDIAN_INT32(bits);
- + }
- +
- + return true;
- +}
- +
- +
- +/*virtual*/ bool
- +BitmapBlock::Unmark(uint32 start, uint32 length, bool force)
- +{
- + if (fData == NULL || start + length > fNumBits)
- + return false;
- +
- + uint32 startIndex = start >> 5;
- + uint32 startBit = start & 0x1F;
- + uint32 remainingBits = (length - 32 + startBit) & 0x1F;
- +
- + uint32 iterations;
- +
- + if (length < 32) {
- + if (startBit + length < 32) {
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[startIndex]);
- +
- + uint32 mask = (1 << startBit + length) - 1;
- + mask &= ~((1 << startBit) - 1);
- +
- + if ((bits & mask) != mask)
- + return false;
- +
- + bits &= ~mask;
- +
- + fData[startIndex] = B_HOST_TO_LENDIAN_INT32(bits);
- +
- + return true;
- + } else
- + iterations = 0;
- + } else
- + iterations = (length - 32 + startBit) >> 5;
- +
- + uint32 index = startIndex;
- + uint32 mask = 0;
- +
- + if (startBit != 0) {
- + mask = ~((1 << startBit) - 1);
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[index]);
- +
- + if (!force && (bits & mask) != mask)
- + return false;
- +
- + bits &= ~mask;
- + fData[index] = B_HOST_TO_LENDIAN_INT32(bits);
- +
- + index += 1;
- + }
- +
- + mask = 0xFFFFFFFF;
- + for (; iterations > 0; --iterations) {
- + if (!force && fData[index] != mask)
- + return false;
- + fData[index++] = 0;
- + }
- +
- + if (remainingBits != 0) {
- + mask = (1 << remainingBits) - 1;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(fData[index]);
- +
- + if (!force && (bits & mask) != mask)
- + return false;
- +
- + bits &= ~mask;
- + fData[index] = B_HOST_TO_LENDIAN_INT32(bits);
- + }
- +
- + return true;
- +}
- +
- +
- +void
- +BitmapBlock::FindNextMarked(uint32& pos)
- +{
- + TRACE("BitmapBlock::FindNextMarked(): pos: %lu\n", pos);
- +
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return;
- +
- + if (pos >= fNumBits) {
- + pos = fNumBits;
- + return;
- + }
- +
- + uint32 index = pos >> 5;
- + uint32 bit = pos & 0x1F;
- +
- + uint32 mask = (1 << bit) - 1;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- +
- + TRACE("BitmapBlock::FindNextMarked(): index: %lu, bit: %lu, mask: %lX, "
- + "bits: %lX\n", index, bit, mask, bits);
- +
- + bits = bits & ~mask;
- +
- + if (bits == 0) {
- + // Find an block of 32 bits that has a marked bit
- + uint32 maxIndex = fNumBits >> 5;
- + TRACE("BitmapBlock::FindNextMarked(): max index: %lu\n", maxIndex);
- +
- + do {
- + index++;
- + } while (index < maxIndex && data[index] == 0);
- +
- + if (index >= maxIndex) {
- + // Not found
- + TRACE("BitmapBlock::FindNextMarked(): reached end of block, num "
- + "bits: %lu\n", fNumBits);
- + pos = fNumBits;
- + return;
- + }
- +
- + bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + bit = 0;
- + }
- +
- + for (; bit < 32; ++bit) {
- + // Find the marked bit
- + if ((bits >> bit & 1) != 0) {
- + pos = index << 5 | bit;
- + TRACE("BitmapBlock::FindNextMarked(): found bit: %lu\n", pos);
- + return;
- + }
- + }
- +
- + panic("Couldn't find marked bit inside an int32 which is different than "
- + "zero!?\n");
- +}
- +
- +
- +void
- +BitmapBlock::FindNextUnmarked(uint32& pos)
- +{
- + TRACE("BitmapBlock::FindNextUnmarked(): pos: %lu\n", pos);
- +
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return;
- +
- + if (pos >= fNumBits) {
- + pos = fNumBits;
- + return;
- + }
- +
- + uint32 index = pos >> 5;
- + uint32 bit = pos & 0x1F;
- +
- + uint32 mask = (1 << bit) - 1;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- +
- + TRACE("BitmapBlock::FindNextUnmarked(): index: %lu, bit: %lu, mask: %lX, "
- + "bits: %lX\n", index, bit, mask, bits);
- +
- + bits &= ~mask;
- +
- + if (bits == ~mask) {
- + // Find an block of 32 bits that has a unmarked bit
- + uint32 maxIndex = fNumBits >> 5;
- + TRACE("BitmapBlock::FindNextUnmarked(): max index: %lu\n", maxIndex);
- +
- + do {
- + index++;
- + } while (index < maxIndex && data[index] == 0xFFFFFFFF);
- +
- + if (index >= maxIndex) {
- + // Not found
- + TRACE("BitmapBlock::FindNextUnmarked(): reached end of block, num "
- + "bits: %lu\n", fNumBits);
- + pos = fNumBits;
- + return;
- + }
- +
- + bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + bit = 0;
- + }
- +
- + for (; bit < 32; ++bit) {
- + // Find the unmarked bit
- + if ((bits >> bit & 1) == 0) {
- + pos = index << 5 | bit;
- + TRACE("BitmapBlock::FindNextUnmarked(): found bit: %lu\n", pos);
- + return;
- + }
- + }
- +
- + panic("Couldn't find unmarked bit inside an int32 whith value zero!?\n");
- +}
- +
- +
- +void
- +BitmapBlock::FindPreviousMarked(uint32& pos)
- +{
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return;
- +
- + if (pos >= fNumBits)
- + pos = fNumBits;
- +
- + if (pos == 0)
- + return;
- +
- + uint32 index = pos >> 5;
- + uint32 bit = pos & 0x1F;
- +
- + uint32 mask = (1 << bit + 1) - 1;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + bits = bits & mask;
- +
- + if (bits == 0) {
- + // Find an block of 32 bits that has a marked bit
- + do { index--; }
- + while (data[index] == 0 && index >= 0);
- +
- + bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + if (bits == 0) {
- + // Not found
- + pos = 0;
- + return;
- + }
- +
- + bit = 31;
- + }
- +
- + for (; bit >= 0; --bit) {
- + // Find the unmarked bit
- + if ((bits >> bit & 1) == 0) {
- + pos = index << 5 | bit;
- + return;
- + }
- + }
- +
- + panic("Couldn't find marked bit inside an int32 whith value different than "
- + "zero!?\n");
- +}
- +
- +
- +void
- +BitmapBlock::FindLargestUnmarkedRange(uint32& start, uint32& length)
- +{
- + const uint32* data = fData == NULL ? fReadOnlyData : fData;
- + if (data == NULL)
- + return;
- +
- + uint32 wordSpan = length >> 5;
- + uint32 lastIndex = fNumBits >> 5;
- + uint32 startIndex = 0;
- + uint32 index = 0;
- + uint32 bits = B_LENDIAN_TO_HOST_INT32(data[0]);
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): word span: %lu, last "
- + "index: %lu, start index: %lu, index: %lu, bits: %lX, start: %lu, "
- + "length: %lu\n", wordSpan, lastIndex, startIndex, index, bits, start,
- + length);
- +
- + if (wordSpan == 0) {
- + uint32 startPos = 0;
- + uint32 endPos = 0;
- +
- + while (endPos < fNumBits) {
- + FindNextUnmarked(startPos);
- + endPos = startPos;
- +
- + if (startPos != fNumBits) {
- + FindNextMarked(endPos);
- +
- + uint32 newLength = endPos - startPos;
- +
- + if (newLength > length) {
- + start = startPos;
- + length = newLength;
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): Found "
- + "larger length %lu starting at %lu\n", length, start);
- + }
- +
- + startPos = endPos;
- +
- + if (newLength >= 32)
- + break;
- + }
- + }
- +
- + if (endPos >= fNumBits)
- + return;
- +
- + wordSpan = length >> 5;
- + startIndex = startPos >> 5;
- + index = (endPos >> 5) + 1;
- + bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- + }
- +
- + for (; index < lastIndex; ++index) {
- + bits = B_LENDIAN_TO_HOST_INT32(data[index]);
- +
- + if (bits != 0) {
- + // Contains marked bits
- + if (index - startIndex >= wordSpan) {
- + uint32 newLength = index - startIndex - 1 << 5;
- + uint32 newStart = startIndex + 1 << 5;
- +
- + uint32 startBits =
- + B_LENDIAN_TO_HOST_INT32(data[startIndex]);
- +
- + for (int32 bit = 31; bit >= 0; --bit) {
- + if ((startBits >> bit & 1) != 0)
- + break;
- +
- + ++newLength;
- + --newStart;
- + }
- +
- + for (int32 bit = 0; bit < 32; ++bit) {
- + if ((bits >> bit & 1) != 0)
- + break;
- +
- + ++newLength;
- + }
- +
- + if (newLength > length) {
- + start = newStart;
- + length = newLength;
- + wordSpan = length >> 5;
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): Found "
- + "larger length %lu starting at %lu; word span: "
- + "%lu\n", length, start, wordSpan);
- + }
- + }
- +
- + startIndex = index;
- + }
- + }
- +
- + --index;
- +
- + if (index - startIndex >= wordSpan) {
- + uint32 newLength = index - startIndex << 5;
- + uint32 newStart = startIndex + 1 << 5;
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): Possibly found a "
- + "larger range. index: %lu, start index: %lu, word span: %lu, "
- + "new length: %lu, new start: %lu\n", index, startIndex, wordSpan,
- + newLength, newStart);
- +
- + if (newStart != 0) {
- + uint32 startBits = B_LENDIAN_TO_HOST_INT32(data[startIndex]);
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): start bits: %lu\n",
- + startBits);
- +
- + for (int32 bit = 31; bit >= 0; --bit) {
- + if ((startBits >> bit & 1) != 0)
- + break;
- +
- + ++newLength;
- + --newStart;
- + }
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): updated new start "
- + "to %lu and new length to %lu\n", newStart, newLength);
- + }
- +
- + for (int32 bit = 0; bit < 32; ++bit) {
- + if ((bits >> bit & 1) == 0)
- + break;
- +
- + ++newLength;
- + }
- +
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): updated new length to "
- + "%lu\n", newLength);
- +
- + if (newLength > length) {
- + start = newStart;
- + length = newLength;
- + TRACE("BitmapBlock::FindLargestUnmarkedRange(): Found "
- + "largest length %lu starting at %lu\n", length, start);
- + }
- + }
- +}
- +
- +
- +uint32
- +BitmapBlock::NumBits() const
- +{
- + return fNumBits;
- +}
- Property changes on: src/add-ons/kernel/file_systems/ext2/BitmapBlock.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/InodeJournal.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/InodeJournal.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/InodeJournal.cpp (revision 0)
- @@ -0,0 +1,90 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "InodeJournal.h"
- +
- +#include <new>
- +
- +#include <fs_cache.h>
- +
- +#include "HashRevokeManager.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +InodeJournal::InodeJournal(Inode* inode)
- + :
- + Journal(),
- + fInode(inode)
- +{
- + if (inode == NULL)
- + fInitStatus = B_BAD_DATA;
- + else {
- + Volume* volume = inode->GetVolume();
- +
- + fFilesystemVolume = volume;
- + fFilesystemBlockCache = volume->BlockCache();
- + fJournalVolume = volume;
- + fJournalBlockCache = volume->BlockCache();
- +
- + if (!inode->IsFileCacheDisabled())
- + fInitStatus = inode->DisableFileCache();
- + else
- + fInitStatus = B_OK;
- +
- + if (fInitStatus == B_OK) {
- + TRACE("InodeJournal::InodeJournal(): Inode's file cache disabled "
- + "successfully\n");
- + HashRevokeManager* revokeManager = new(std::nothrow)
- + HashRevokeManager;
- + TRACE("InodeJournal::InodeJournal(): Allocated a hash revoke "
- + "manager at %p\n", revokeManager);
- +
- + if (revokeManager == NULL) {
- + TRACE("InodeJournal::InodeJournal(): Insufficient memory to "
- + "create the hash revoke manager\n");
- + fInitStatus = B_NO_MEMORY;
- + } else {
- + fInitStatus = revokeManager->Init();
- +
- + if (fInitStatus == B_OK) {
- + fRevokeManager = revokeManager;
- + fInitStatus = _LoadSuperBlock();
- + }
- + }
- + }
- + }
- +}
- +
- +
- +InodeJournal::~InodeJournal()
- +{
- +}
- +
- +
- +status_t
- +InodeJournal::InitCheck()
- +{
- + if (fInitStatus != B_OK)
- + TRACE("InodeJournal: Initialization error\n");
- + return fInitStatus;
- +}
- +
- +
- +status_t
- +InodeJournal::MapBlock(uint32 logical, uint32& physical)
- +{
- + TRACE("InodeJournal::MapBlock()\n");
- + return fInode->FindBlock(logical * fBlockSize, physical);
- +}
- Index: src/add-ons/kernel/file_systems/ext2/Transaction.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Transaction.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/Transaction.h (revision 0)
- @@ -0,0 +1,72 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef TRANSACTION_H
- +#define TRANSACTION_H
- +
- +
- +#include <util/DoublyLinkedList.h>
- +
- +
- +class Journal;
- +class Volume;
- +
- +
- +class TransactionListener
- + : public DoublyLinkedListLinkImpl<TransactionListener> {
- +public:
- + TransactionListener();
- + virtual ~TransactionListener();
- +
- + virtual void TransactionDone(bool success) = 0;
- + virtual void RemovedFromTransaction() = 0;
- +};
- +
- +typedef DoublyLinkedList<TransactionListener> TransactionListeners;
- +
- +
- +class Transaction {
- +public:
- + Transaction();
- + Transaction(Journal* journal);
- + ~Transaction();
- +
- + status_t Start(Journal* journal);
- + status_t Done(bool success = true);
- +
- + bool IsStarted() const;
- + bool HasParent() const;
- +
- + status_t WriteBlocks(off_t blockNumber,
- + const uint8* buffer,
- + size_t numBlocks = 1);
- +
- + void Split();
- +
- + Volume* GetVolume() const;
- + int32 ID() const;
- +
- + void AddListener(TransactionListener* listener);
- + void RemoveListener(
- + TransactionListener* listener);
- +
- + void NotifyListeners(bool success);
- + void MoveListenersTo(Transaction* transaction);
- +
- + void SetParent(Transaction* transaction);
- + Transaction* Parent() const;
- +private:
- + Transaction(const Transaction& other);
- + Transaction& operator=(const Transaction& other);
- + // no implementation
- +
- + Journal* fJournal;
- + TransactionListeners fListeners;
- + Transaction* fParent;
- +};
- +
- +#endif // TRANSACTION_H
- Index: src/add-ons/kernel/file_systems/ext2/BlockAllocator.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/BlockAllocator.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/BlockAllocator.cpp (revision 0)
- @@ -0,0 +1,661 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "BlockAllocator.h"
- +
- +#include <util/AutoLock.h>
- +
- +#include "BitmapBlock.h"
- +#include "Inode.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +class AllocationBlockGroup : public TransactionListener {
- +public:
- + AllocationBlockGroup();
- + ~AllocationBlockGroup();
- +
- + status_t Initialize(Volume* v, uint32 blockGroup,
- + uint32 numBits);
- +
- + status_t ScanFreeRanges();
- + bool IsFull() const;
- +
- + status_t Allocate(Transaction& transaction, uint32 start,
- + uint32 length);
- + status_t Free(Transaction& transaction, uint32 start,
- + uint32 length);
- + status_t FreeAll(Transaction& transaction);
- + status_t Check(uint32 start, uint32 length);
- +
- + uint32 NumBits() const;
- + uint32 FreeBits() const;
- + uint32 Start() const;
- +
- + uint32 LargestStart() const;
- + uint32 LargestLength() const;
- +
- + // TransactionListener implementation
- + void TransactionDone(bool success);
- + void RemovedFromTransaction();
- +
- +private:
- + void _AddFreeRange(uint32 start, uint32 length);
- +
- +
- + Volume* fVolume;
- +
- + uint32 fStart;
- + uint32 fNumBits;
- + uint32 fBitmapBlock;
- +
- + uint32 fFreeBits;
- + uint32 fFirstFree;
- + uint32 fLargestStart;
- + uint32 fLargestLength;
- +
- + uint32 fPreviousFreeBits;
- + uint32 fPreviousFirstFree;
- + uint32 fPreviousLargestStart;
- + uint32 fPreviousLargestLength;
- +};
- +
- +
- +class BlockAllocatorTransactionListener : public TransactionListener {
- +public:
- + BlockAllocatorTransactionListener(
- + BlockAllocator* allocator, uint32 blocks);
- + ~BlockAllocatorTransactionListener();
- +
- + void TransactionDone(bool success);
- + void RemovedFromTransaction();
- +private:
- + BlockAllocator* fAllocator;
- + uint32 fBlockAffected;
- +};
- +
- +
- +AllocationBlockGroup::AllocationBlockGroup()
- + :
- + fStart(0),
- + fNumBits(0),
- + fBitmapBlock(0),
- + fFreeBits(0),
- + fFirstFree(0),
- + fLargestStart(0),
- + fLargestLength(0),
- + fPreviousFreeBits(0),
- + fPreviousFirstFree(0),
- + fPreviousLargestStart(0),
- + fPreviousLargestLength(0)
- +{
- +}
- +
- +
- +AllocationBlockGroup::~AllocationBlockGroup()
- +{
- +}
- +
- +
- +status_t
- +AllocationBlockGroup::Initialize(Volume* volume, uint32 blockGroup,
- + uint32 numBits)
- +{
- + fVolume = volume;
- + fNumBits = numBits;
- +
- + ext2_block_group* group;
- + status_t status = fVolume->GetBlockGroup(blockGroup, &group);
- + if (status != B_OK)
- + return status;
- +
- + fBitmapBlock = group->BlockBitmap();
- +
- + status = ScanFreeRanges();
- +
- + fPreviousFreeBits = fFreeBits;
- + fPreviousFirstFree = fFirstFree;
- + fPreviousLargestStart = fLargestStart;
- + fPreviousLargestLength = fLargestLength;
- +
- + return status;
- +}
- +
- +
- +status_t
- +AllocationBlockGroup::ScanFreeRanges()
- +{
- + TRACE("AllocationBlockGroup::ScanFreeRanges()\n");
- + BitmapBlock block(fVolume, fNumBits);
- +
- + if (!block.SetTo(fBitmapBlock))
- + return B_ERROR;
- +
- + uint32 start = 0;
- + uint32 end = 0;
- +
- + while (end < fNumBits) {
- + block.FindNextUnmarked(start);
- + end = start;
- +
- + if (start != block.NumBits()) {
- + block.FindNextMarked(end);
- + _AddFreeRange(start, end - start);
- + start = end;
- + }
- + }
- +
- + return B_OK;
- +}
- +
- +
- +bool
- +AllocationBlockGroup::IsFull() const
- +{
- + return fFreeBits == 0;
- +}
- +
- +
- +status_t
- +AllocationBlockGroup::Allocate(Transaction& transaction, uint32 start,
- + uint32 length)
- +{
- + TRACE("AllocationBlockGroup::Allocate()\n");
- + uint32 end = start + length;
- + if (end > fLargestLength + fLargestStart)
- + return B_BAD_DATA;
- +
- + BitmapBlock block(fVolume, fNumBits);
- +
- + if (!block.SetToWritable(transaction, fBitmapBlock))
- + return B_ERROR;
- +
- + if (!block.Mark(start, length)) {
- + TRACE("Failed to allocate blocks from %lu to %lu. Some were "
- + "already allocated.\n", start, start + length);
- + return B_ERROR;
- + }
- +
- + transaction.AddListener(this);
- +
- + fFreeBits -= length;
- +
- + if (start == fLargestStart) {
- + if (fFirstFree == fLargestStart)
- + fFirstFree += length;
- +
- + fLargestStart += length;
- + fLargestLength -= length;
- + } else if (start + length == fLargestStart + fLargestLength) {
- + fLargestLength -= length;
- + } else if (start < fLargestStart + fLargestLength
- + && start > fLargestStart) {
- + uint32 firstLength = start - fLargestStart;
- + uint32 secondLength = fLargestStart + fLargestLength
- + - (start + length);
- +
- + if (firstLength >= secondLength) {
- + fLargestLength = firstLength;
- + } else {
- + fLargestLength = secondLength;
- + fLargestStart = start + length;
- + }
- + } else {
- + // No need to revalidate the largest free range
- + return B_OK;
- + }
- +
- + if (fLargestLength < fNumBits / 2)
- + block.FindLargestUnmarkedRange(fLargestStart, fLargestLength);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +AllocationBlockGroup::Free(Transaction& transaction, uint32 start,
- + uint32 length)
- +{
- + uint32 end = start + length;
- +
- + if (end > fLargestLength)
- + return B_BAD_DATA;
- +
- + BitmapBlock block(fVolume, fNumBits);
- +
- + if (!block.SetToWritable(transaction, fBitmapBlock))
- + return B_ERROR;
- +
- + if (!block.Unmark(start, length)) {
- + TRACE("Failed to free blocks from %lu to %lu. Some were "
- + "already freed.\n", start, start + length);
- + return B_ERROR;
- + }
- +
- + transaction.AddListener(this);
- +
- + if (fFirstFree > start)
- + fFirstFree = start;
- +
- + if (start + length == fLargestStart) {
- + fLargestStart = start;
- + fLargestLength += length;
- + } else if (start == fLargestStart + fLargestLength) {
- + fLargestLength += length;
- + } else if (fLargestLength >= fNumBits / 2) {
- + // May have merged with some free blocks, becoming the largest
- + uint32 newEnd = start + length;
- + block.FindNextMarked(newEnd);
- +
- + uint32 newStart = start;
- + block.FindPreviousMarked(newStart);
- +
- + if (newEnd - newStart > fLargestLength) {
- + fLargestLength = newEnd - newStart;
- + fLargestStart = newStart;
- + }
- + }
- +
- + fFreeBits += length;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +AllocationBlockGroup::FreeAll(Transaction& transaction)
- +{
- + return Free(transaction, 0, fNumBits);
- +}
- +
- +
- +uint32
- +AllocationBlockGroup::NumBits() const
- +{
- + return fNumBits;
- +}
- +
- +
- +uint32
- +AllocationBlockGroup::FreeBits() const
- +{
- + return fFreeBits;
- +}
- +
- +
- +uint32
- +AllocationBlockGroup::Start() const
- +{
- + return fStart;
- +}
- +
- +
- +uint32
- +AllocationBlockGroup::LargestStart() const
- +{
- + return fLargestStart;
- +}
- +
- +
- +uint32
- +AllocationBlockGroup::LargestLength() const
- +{
- + return fLargestLength;
- +}
- +
- +
- +void
- +AllocationBlockGroup::_AddFreeRange(uint32 start, uint32 length)
- +{
- + if (IsFull()) {
- + fFirstFree = start;
- + fLargestStart = start;
- + fLargestLength = length;
- + } else if (length > fLargestLength) {
- + fLargestStart = start;
- + fLargestLength = length;
- + }
- +
- + fFreeBits += length;
- +}
- +
- +
- +void
- +AllocationBlockGroup::TransactionDone(bool success)
- +{
- + if (success) {
- + TRACE("AllocationBlockGroup::TransactionDone(): The transaction "
- + "succeeded, discarding previous state\n");
- + fPreviousFreeBits = fFreeBits;
- + fPreviousFirstFree = fFirstFree;
- + fPreviousLargestStart = fLargestStart;
- + fPreviousLargestLength = fLargestLength;
- + } else {
- + TRACE("AllocationBlockGroup::TransactionDone(): The transaction "
- + "failed, restoring to previous state\n");
- + fFreeBits = fPreviousFreeBits;
- + fFirstFree = fPreviousFirstFree;
- + fLargestStart = fPreviousLargestStart;
- + fLargestLength = fPreviousLargestLength;
- + }
- +}
- +
- +
- +void
- +AllocationBlockGroup::RemovedFromTransaction()
- +{
- + // TODO: What to do here?
- +}
- +
- +
- +BlockAllocator::BlockAllocator(Volume* volume)
- + :
- + fVolume(volume),
- + fGroups(NULL),
- + fBlocksPerGroup(0),
- + fNumBlocks(0),
- + fNumGroups(0)
- +{
- + mutex_init(&fLock, "ext2 block allocator");
- +}
- +
- +
- +BlockAllocator::~BlockAllocator()
- +{
- + mutex_destroy(&fLock);
- +
- + if (fGroups != NULL)
- + delete [] fGroups;
- +}
- +
- +
- +status_t
- +BlockAllocator::Initialize()
- +{
- + fBlocksPerGroup = fVolume->BlocksPerGroup();
- + fNumGroups = fVolume->NumGroups();
- + fFirstBlock = fVolume->FirstDataBlock();
- + fNumBlocks = fVolume->NumBlocks();
- +
- + TRACE("BlockAllocator::Initialize(): blocks per group: %lu, block groups: "
- + "%lu, first block: %lu, num blocks: %lu\n", fBlocksPerGroup,
- + fNumGroups, fFirstBlock, fNumBlocks);
- +
- + fGroups = new(std::nothrow) AllocationBlockGroup[fNumGroups];
- + if (fGroups == NULL)
- + return B_NO_MEMORY;
- +
- + TRACE("BlockAllocator::Initialize(): allocated allocation block groups\n");
- +
- + mutex_lock(&fLock);
- + // Released by _Initialize
- +
- + thread_id id = -1; // spawn_kernel_thread(
- + // (thread_func)BlockAllocator::_Initialize, "ext2 block allocator",
- + // B_LOW_PRIORITY, this);
- + if (id < B_OK)
- + return _Initialize(this);
- +
- + // mutex_transfer_lock(&fLock, id);
- +
- + // return resume_thread(id);
- + panic("Failed to fall back to synchronous block allocator"
- + "initialization.\n");
- + return B_ERROR;
- +}
- +
- +
- +status_t
- +BlockAllocator::AllocateBlocks(Transaction& transaction, uint32 minimum,
- + uint32 maximum, uint32& blockGroup, uint32& start, uint32& length)
- +{
- + TRACE("BlockAllocator::AllocateBlocks()\n");
- + MutexLocker lock(fLock);
- + TRACE("BlockAllocator::AllocateBlocks(): Aquired lock\n");
- +
- + TRACE("BlockAllocator::AllocateBlocks(): transaction: %ld, min: %lu, "
- + "max: %lu, block group: %lu, start: %lu, num groups: %lu\n",
- + transaction.ID(), minimum, maximum, blockGroup, start, fNumGroups);
- +
- + uint32 bestStart = 0;
- + uint32 bestLength = 0;
- + uint32 bestGroup = 0;
- +
- + uint32 groupNum = blockGroup;
- +
- + AllocationBlockGroup* last = &fGroups[fNumGroups];
- + AllocationBlockGroup* group = &fGroups[blockGroup];
- +
- + for (int32 iterations = 0; iterations < 2; iterations++) {
- + for (; group < last; ++group, ++groupNum) {
- + TRACE("BlockAllocator::AllocateBlocks(): Group %lu has largest "
- + "length of %lu\n", groupNum, group->LargestLength());
- +
- + if (group->LargestLength() > bestLength) {
- + if (start <= group->LargestStart()) {
- + bestStart = group->LargestStart();
- + bestLength = group->LargestLength();
- + bestGroup = groupNum;
- +
- + TRACE("BlockAllocator::AllocateBlocks(): Found a better "
- + "range: block group: %lu, %lu-%lu\n", groupNum,
- + bestStart, bestStart + bestLength);
- +
- + if (bestLength >= maximum)
- + break;
- + }
- + }
- +
- + start = 0;
- + }
- +
- + if (bestLength >= maximum)
- + break;
- +
- + groupNum = 0;
- +
- + group = &fGroups[0];
- + last = &fGroups[blockGroup + 1];
- + }
- +
- + if (bestLength < minimum) {
- + TRACE("BlockAllocator::AllocateBlocks(): best range (length %lu) "
- + "doesn't have minimum length of %lu\n", bestLength, minimum);
- + return B_DEVICE_FULL;
- + }
- +
- + if (bestLength > maximum)
- + bestLength = maximum;
- +
- + TRACE("BlockAllocator::AllocateBlocks(): Selected range: block group %lu, "
- + "%lu-%lu\n", bestGroup, bestStart, bestStart + bestLength);
- +
- + status_t status = fGroups[bestGroup].Allocate(transaction, bestStart,
- + bestLength);
- + if (status != B_OK) {
- + TRACE("BlockAllocator::AllocateBlocks(): Failed to allocate %lu blocks "
- + "inside block group %lu.\n", bestLength, bestGroup);
- + return status;
- + }
- +
- + start = bestStart;
- + length = bestLength;
- + blockGroup = bestGroup;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +BlockAllocator::Allocate(Transaction& transaction, Inode* inode,
- + off_t numBlocks, uint32 minimum, uint32& start, uint32& allocated)
- +{
- + if (numBlocks <= 0)
- + return B_ERROR;
- +
- + uint32 group = inode->ID() / fVolume->InodesPerGroup();
- + uint32 preferred = 0;
- +
- + if (inode->Size() > 0) {
- + // Try to allocate near it's last blocks
- + ext2_data_stream* dataStream = &inode->Node().stream;
- + uint32 numBlocks = inode->Size() / fVolume->BlockSize() + 1;
- + uint32 lastBlock = 0;
- +
- + // DANGER! What happens with sparse files?
- + if (numBlocks < EXT2_DIRECT_BLOCKS) {
- + // Only direct blocks
- + lastBlock = dataStream->direct[numBlocks];
- + } else {
- + numBlocks -= EXT2_DIRECT_BLOCKS - 1;
- + uint32 numIndexes = fVolume->BlockSize() / 4;
- + // block size / sizeof(int32)
- + uint32 numIndexes2 = numIndexes * numIndexes;
- + uint32 numIndexes3 = numIndexes2 * numIndexes;
- + uint32 indexesInIndirect = numIndexes;
- + uint32 indexesInDoubleIndirect = indexesInIndirect
- + + numIndexes2;
- + // uint32 indexesInTripleIndirect = indexesInDoubleIndirect
- + // + numIndexes3;
- +
- + uint32 doubleIndirectBlock = EXT2_DIRECT_BLOCKS + 1;
- + uint32 indirectBlock = EXT2_DIRECT_BLOCKS;
- +
- + CachedBlock cached(fVolume);
- + uint32* indirectData;
- +
- + if (numBlocks > indexesInDoubleIndirect) {
- + // Triple indirect blocks
- + indirectData = (uint32*)cached.SetTo(EXT2_DIRECT_BLOCKS + 2);
- + if (indirectData == NULL)
- + return B_IO_ERROR;
- +
- + uint32 index = (numBlocks - indexesInDoubleIndirect)
- + / numIndexes3;
- + doubleIndirectBlock = indirectData[index];
- + }
- +
- + if (numBlocks > indexesInIndirect) {
- + // Double indirect blocks
- + indirectData = (uint32*)cached.SetTo(doubleIndirectBlock);
- + if (indirectData == NULL)
- + return B_IO_ERROR;
- +
- + uint32 index = (numBlocks - indexesInIndirect) / numIndexes2;
- + indirectBlock = indirectData[index];
- + }
- +
- + indirectData = (uint32*)cached.SetTo(indirectBlock);
- + if (indirectData == NULL)
- + return B_IO_ERROR;
- +
- + uint32 index = numBlocks / numIndexes;
- + lastBlock = indirectData[index];
- + }
- +
- + group = (lastBlock - fFirstBlock) / fBlocksPerGroup;
- + preferred = (lastBlock - fFirstBlock) % fBlocksPerGroup + 1;
- + }
- +
- + // TODO: Apply some more policies
- +
- + return AllocateBlocks(transaction, minimum, minimum + 8, group, start,
- + allocated);
- +}
- +
- +
- +status_t
- +BlockAllocator::Free(Transaction& transaction, uint32 start, uint32 length)
- +{
- + MutexLocker lock(fLock);
- +
- + if (start == 0) {
- + panic("Trying to free superblock!\n");
- + return B_BAD_DATA;
- + }
- +
- + if (length == 0)
- + return B_OK;
- +
- + uint32 group = (start - fFirstBlock) / fBlocksPerGroup;
- + start = (start - fFirstBlock) % fBlocksPerGroup;
- + uint32 lastGroup = (start + length - fFirstBlock) / fBlocksPerGroup;
- +
- + if (group == lastGroup)
- + return fGroups[group].Free(transaction, start, length);
- +
- + status_t status = fGroups[group].Free(transaction, start,
- + fGroups[group].NumBits());
- + if (status != B_OK)
- + return status;
- +
- + for (++group; group < lastGroup; ++group) {
- + status = fGroups[group].FreeAll(transaction);
- + if (status != B_OK)
- + return status;
- + }
- +
- + return fGroups[group].Free(transaction, 0, (start + length - fFirstBlock)
- + % fBlocksPerGroup);
- +}
- +
- +
- +/*static*/ status_t
- +BlockAllocator::_Initialize(BlockAllocator* allocator)
- +{
- + TRACE("BlockAllocator::_Initialize()\n");
- + // fLock is already heald
- + Volume* volume = allocator->fVolume;
- +
- + AllocationBlockGroup* groups = allocator->fGroups;
- + uint32 numGroups = allocator->fNumGroups - 1;
- +
- + uint32 freeBlocks = 0;
- + TRACE("BlockAllocator::_Initialize(): free blocks: %lu\n", freeBlocks);
- +
- + for (uint32 i = 0; i < numGroups; ++i) {
- + status_t status = groups[i].Initialize(volume, i,
- + allocator->fBlocksPerGroup);
- + if (status != B_OK) {
- + mutex_unlock(&allocator->fLock);
- + return status;
- + }
- +
- + freeBlocks += groups[i].FreeBits();
- + TRACE("BlockAllocator::_Initialize(): free blocks: %lu\n", freeBlocks);
- + }
- +
- + // Last block group may have less blocks
- + status_t status = groups[numGroups].Initialize(volume, numGroups,
- + allocator->fNumBlocks - allocator->fBlocksPerGroup * numGroups
- + - allocator->fFirstBlock);
- + if (status != B_OK) {
- + mutex_unlock(&allocator->fLock);
- + return status;
- + }
- +
- + freeBlocks += groups[numGroups].FreeBits();
- +
- + TRACE("BlockAllocator::_Initialize(): free blocks: %lu\n", freeBlocks);
- +
- + mutex_unlock(&allocator->fLock);
- +
- + if (freeBlocks != volume->NumFreeBlocks()) {
- + TRACE("Counted free blocks doesn't match value in the superblock.\n");
- + return B_BAD_DATA;
- + }
- +
- + return B_OK;
- +}
- Property changes on: src/add-ons/kernel/file_systems/ext2/BlockAllocator.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/Inode.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Inode.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/Inode.cpp (working copy)
- @@ -8,8 +8,12 @@
- #include <fs_cache.h>
- #include <string.h>
- +#include <util/AutoLock.h>
- #include "CachedBlock.h"
- +#include "DirectoryIterator.h"
- +#include "HTree.h"
- +#include "Utility.h"
- //#define TRACE_EXT2
- @@ -26,56 +30,131 @@
- fID(id),
- fCache(NULL),
- fMap(NULL),
- - fNode(NULL),
- fAttributesBlock(NULL)
- {
- rw_lock_init(&fLock, "ext2 inode");
- - uint32 block;
- - if (volume->GetInodeBlock(id, block) == B_OK) {
- - TRACE("inode %Ld at block %lu\n", ID(), block);
- - uint8* inodeBlock = (uint8*)block_cache_get(volume->BlockCache(),
- - block);
- - if (inodeBlock != NULL) {
- - fNode = (ext2_inode*)(inodeBlock + volume->InodeBlockIndex(id)
- - * volume->InodeSize());
- + fInitStatus = UpdateNodeFromDisk();
- + if (fInitStatus == B_OK) {
- + if (Size() == 0 || IsDirectory() || (IsSymLink() && Size() < 60)) {
- + fCached = false;
- + } else {
- + fCache = file_cache_create(fVolume->ID(), ID(), Size());
- + fMap = file_map_create(fVolume->ID(), ID(), Size());
- +
- + if (fCache != NULL)
- + fCached = true;
- + else {
- + fCached = false;
- + fInitStatus = B_ERROR;
- + }
- }
- + } else {
- + TRACE("Inode: Failed initialization\n");
- + fCached = false;
- }
- -
- - if (fNode != NULL) {
- - // TODO: we don't need a cache for short symlinks
- - fCache = file_cache_create(fVolume->ID(), ID(), Size());
- - fMap = file_map_create(fVolume->ID(), ID(), Size());
- - }
- }
- Inode::~Inode()
- {
- - file_cache_delete(FileCache());
- - file_map_delete(Map());
- + TRACE("Inode destructor\n");
- + if (fCached) {
- + TRACE("Deleting the file cache and file map\n");
- + file_cache_delete(FileCache());
- + file_map_delete(Map());
- + }
- +
- if (fAttributesBlock) {
- + TRACE("Returning the attributes block\n");
- uint32 block = B_LENDIAN_TO_HOST_INT32(Node().file_access_control);
- block_cache_put(fVolume->BlockCache(), block);
- }
- - if (fNode != NULL) {
- - uint32 block;
- - if (fVolume->GetInodeBlock(ID(), block) == B_OK)
- - block_cache_put(fVolume->BlockCache(), block);
- - }
- + TRACE("Inode destructor: Done\n");
- }
- status_t
- Inode::InitCheck()
- {
- - return fNode != NULL ? B_OK : B_ERROR;
- + return fInitStatus;
- }
- +void
- +Inode::WriteLockInTransaction(Transaction& transaction)
- +{
- + acquire_vnode(fVolume->FSVolume(), ID());
- +
- + rw_lock_write_lock(&fLock);
- +
- + transaction.AddListener(this);
- +}
- +
- +
- status_t
- +Inode::WriteBack(Transaction& transaction)
- +{
- + WriteLockInTransaction(transaction);
- +
- + uint32 inodeBlock;
- +
- + status_t status = fVolume->GetInodeBlock(fID, inodeBlock);
- + if (status != B_OK)
- + return status;
- +
- + CachedBlock cached(fVolume);
- + uint8* inodeBlockData = cached.SetToWritable(transaction, inodeBlock);
- + if (inodeBlockData == NULL)
- + return B_IO_ERROR;
- +
- + memcpy(inodeBlockData +
- + fVolume->InodeBlockIndex(fID) * fVolume->InodeSize(),
- + (uint8*)&fNode, fNodeSize);
- +
- + TRACE("Inode::WriteBack() finished\n");
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::UpdateNodeFromDisk()
- +{
- + uint32 block;
- +
- + status_t status = fVolume->GetInodeBlock(fID, block);
- + if (status != B_OK)
- + return status;
- +
- + TRACE("inode %Ld at block %lu\n", fID, block);
- +
- + CachedBlock cached(fVolume);
- + const uint8* inodeBlock = cached.SetTo(block);
- +
- + if (inodeBlock == NULL)
- + return B_IO_ERROR;
- +
- + TRACE("Inode size: %lu, inode index: %lu\n", fVolume->InodeSize(),
- + fVolume->InodeBlockIndex(fID));
- + ext2_inode* inode = (ext2_inode*)(inodeBlock
- + + fVolume->InodeBlockIndex(fID) * fVolume->InodeSize());
- +
- + fNodeSize = sizeof(ext2_inode) > fVolume->InodeSize()
- + ? fVolume->InodeSize() : sizeof(ext2_inode);
- +
- + TRACE("Attempting to copy inode data from %p to %p, ext2_inode "
- + "size: %lu\n", inode, &fNode, fNodeSize);
- +
- + memcpy(&fNode, inode, fNodeSize);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- Inode::CheckPermissions(int accessMode) const
- {
- uid_t user = geteuid();
- @@ -95,9 +174,9 @@
- // shift mode bits, to check directly against accessMode
- mode_t mode = Mode();
- - if (user == (uid_t)fNode->UserID())
- + if (user == (uid_t)fNode.UserID())
- mode >>= 6;
- - else if (group == (gid_t)fNode->GroupID())
- + else if (group == (gid_t)fNode.GroupID())
- mode >>= 3;
- if (accessMode & ~(mode & S_IRWXO))
- @@ -114,8 +193,10 @@
- uint32 perIndirectBlock = perBlock * perBlock;
- uint32 index = offset >> fVolume->BlockShift();
- - if (offset >= Size())
- + if (offset >= Size()) {
- + TRACE("FindBlock: offset larger than inode size\n");
- return B_ENTRY_NOT_FOUND;
- + }
- // TODO: we could return the size of the sparse range, as this might be more
- // than just a block
- @@ -186,7 +267,7 @@
- }
- }
- } else {
- - // outside of the possible data stream
- + // Outside of the possible data stream
- dprintf("ext2: block outside datastream!\n");
- return B_ERROR;
- }
- @@ -203,7 +284,8 @@
- // set/check boundaries for pos/length
- if (pos < 0) {
- - TRACE("inode %Ld: ReadAt failed(pos %Ld, length %lu)\n", ID(), pos, length);
- + TRACE("inode %Ld: ReadAt failed(pos %Ld, length %lu)\n", ID(), pos,
- + length);
- return B_BAD_VALUE;
- }
- @@ -218,6 +300,120 @@
- status_t
- +Inode::WriteAt(Transaction& transaction, off_t pos, uint8* buffer,
- + size_t* _length)
- +{
- + ReadLocker readLocker(fLock);
- +
- + if (pos < 0)
- + return B_BAD_DATA;
- +
- + readLocker.Unlock();
- +
- + transaction.Start(fVolume->GetJournal());
- + // We will update the modified time anyway
- +
- + WriteLocker writeLocker(fLock);
- +
- + size_t length = *_length;
- + off_t end = pos + length;
- + off_t oldSize = Size();
- +
- + if (end > oldSize) {
- + status_t status = Resize(transaction, end);
- + if (status != B_OK) {
- + *_length = 0;
- + WriteLockInTransaction(transaction);
- + return status;
- + }
- +
- + status = WriteBack(transaction);
- + if (status != B_OK) {
- + *_length = 0;
- + WriteLockInTransaction(transaction);
- + return status;
- + }
- + }
- +
- + writeLocker.Unlock();
- +
- + if (oldSize < pos)
- + FillGapWithZeros(oldSize, pos);
- +
- + if (length == 0) {
- + // Probably just changed the file size with the pos parameter
- + return B_OK;
- + }
- +
- + status_t status = file_cache_write(FileCache(), NULL, pos, buffer, _length);
- +
- + WriteLockInTransaction(transaction);
- +
- + return status;
- +}
- +
- +
- +status_t
- +Inode::FillGapWithZeros(off_t start, off_t end)
- +{
- + while (start < end) {
- + size_t size;
- +
- + if (end > start + 1024 * 1024 * 1024)
- + size = 1024 * 1024 * 1024;
- + else
- + size = end - start;
- +
- + status_t status = file_cache_write(FileCache(), NULL, start, NULL,
- + &size);
- + if (status != B_OK)
- + return status;
- +
- + start += size;
- + }
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::Resize(Transaction& transaction, off_t size)
- +{
- + TRACE("Inode::Resize() size: %ld\n", (long)size);
- + if (size < 0)
- + return B_BAD_VALUE;
- +
- + off_t oldSize = Size();
- +
- + if (size == oldSize)
- + return B_OK;
- +
- + status_t status;
- + if (size > oldSize) {
- + status = _EnlargeDataStream(transaction, size);
- + if (status != B_OK) {
- + // Restore original size
- + _ShrinkDataStream(transaction, oldSize);
- + }
- + } else
- + status = _ShrinkDataStream(transaction, size);
- +
- + TRACE("Inode::Resize(): Updating file map and cache\n");
- +
- + if (status != B_OK)
- + return status;
- +
- + file_cache_set_size(FileCache(), size);
- + file_map_set_size(Map(), size);
- +
- + TRACE("Inode::Resize(): Writing back inode changes. Size: %ld\n",
- + (long)Size());
- +
- + return WriteBack(transaction);
- +}
- +
- +
- +status_t
- Inode::AttributeBlockReadAt(off_t pos, uint8* buffer, size_t* _length)
- {
- TRACE("Inode::%s(%Ld, , %lu)\n", __FUNCTION__, pos, *_length);
- @@ -245,3 +441,816 @@
- *_length = length;
- return B_NO_ERROR;
- }
- +
- +
- +status_t
- +Inode::InitDirectory(Transaction& transaction, Inode* parent)
- +{
- + uint32 blockSize = fVolume->BlockSize();
- +
- + status_t status = Resize(transaction, blockSize);
- + if (status != B_OK)
- + return status;
- +
- + uint32 blockNum;
- + status = FindBlock(0, blockNum);
- + if (status != B_OK)
- + return status;
- +
- + CachedBlock cached(fVolume);
- + uint8* block = cached.SetToWritable(transaction, blockNum, true);
- +
- + HTreeRoot* root = (HTreeRoot*)block;
- + root->dot.inode_id = fID;
- + root->dot.entry_length = 12;
- + root->dot.name_length = 1;
- + root->dot.file_type = EXT2_TYPE_DIRECTORY;
- + root->dot_entry_name[0] = '.';
- +
- + root->dotdot.inode_id = parent == NULL ? fID : parent->ID();
- + root->dotdot.entry_length = blockSize - 12;
- + root->dotdot.name_length = 2;
- + root->dotdot.file_type = EXT2_TYPE_DIRECTORY;
- + root->dotdot_entry_name[0] = '.';
- + root->dotdot_entry_name[1] = '.';
- +
- + return B_OK;
- +}
- +
- +
- +/*static*/ status_t
- +Inode::Create(Transaction& transaction, Inode* parent, const char* name,
- + int32 mode, int openMode, uint32 type, bool* _created, ino_t* _id,
- + Inode** _inode, fs_vnode_ops* vnodeOps, uint32 publishFlags)
- +{
- + Volume* volume = transaction.GetVolume();
- +
- + DirectoryIterator* entries = NULL;
- + ObjectDeleter<DirectoryIterator> entriesDeleter;
- +
- + if (parent != NULL) {
- + parent->WriteLockInTransaction(transaction);
- +
- + HTree htree(volume, parent);
- +
- + status_t status = htree.Lookup(name, &entries);
- + if (status == B_ENTRY_NOT_FOUND) {
- + panic("We need to add the first node.\n");
- + return B_ERROR;
- + }
- + if (status != B_OK)
- + return status;
- + entriesDeleter.SetTo(entries);
- +
- + ino_t entryID;
- +
- + status = entries->FindEntry(name, &entryID);
- + if (status == B_OK) {
- + // File already exists
- + if (S_ISDIR(mode) || S_ISLNK(mode) || (openMode & O_EXCL) != 0)
- + return B_FILE_EXISTS;
- +
- + Vnode vnode(volume, entryID);
- + Inode* inode;
- +
- + status = vnode.Get(&inode);
- + if (status != B_OK) {
- + TRACE("Inode::Create() Failed to get the inode from the "
- + "vnode\n");
- + return B_ENTRY_NOT_FOUND;
- + }
- +
- + if (inode->IsDirectory() && (openMode & O_RWMASK) != O_RDONLY)
- + return B_IS_A_DIRECTORY;
- + if ((openMode & O_DIRECTORY) != 0 && !inode->IsDirectory())
- + return B_NOT_A_DIRECTORY;
- +
- + if (inode->CheckPermissions(open_mode_to_access(openMode)
- + | ((openMode & O_TRUNC) != 0 ? W_OK : 0)) != B_OK)
- + return B_NOT_ALLOWED;
- +
- + if ((openMode & O_TRUNC) != 0) {
- + // Truncate requested
- + inode->WriteLockInTransaction(transaction);
- +
- + status = inode->Resize(transaction, 0);
- + if (status != B_OK)
- + return status;
- + }
- +
- + if (_created != NULL)
- + *_created = false;
- + if (_id != NULL)
- + *_id = inode->ID();
- + if (_inode != NULL)
- + *_inode = inode;
- +
- + if (_id != NULL || _inode != NULL)
- + vnode.Keep();
- +
- + return B_OK;
- + } else if ((mode & S_ATTR_DIR) == 0) {
- + return B_BAD_VALUE;
- + } else if ((openMode & O_DIRECTORY) != 0) {
- + return B_ENTRY_NOT_FOUND;
- + } else {
- + // Return to initial position
- + status_t status = htree.Lookup(name, &entries);
- + // TODO: We need a LookupForInsertion method, that allocates
- + // any blocks that are necessary
- + if (status != B_OK)
- + return status;
- + entriesDeleter.SetTo(entries);
- + }
- + }
- +
- + status_t status;
- + if (parent != NULL) {
- + status = parent->CheckPermissions(W_OK);
- + if (status != B_OK)
- + return status;
- + }
- +
- + ino_t id;
- + status = volume->AllocateInode(transaction, parent, mode, id);
- + if (status != B_OK)
- + return status;
- +
- + if (entries != NULL) {
- + size_t nameLength = strlen(name);
- + status = entries->AddEntry(transaction, name, nameLength, id);
- + if (status != B_OK)
- + return status;
- + }
- +
- + Inode* inode = new(std::nothrow) Inode(volume, id);
- + if (inode == NULL)
- + return B_NO_MEMORY;
- +
- + ext2_inode& node = inode->Node();
- + node.SetMode(mode);
- + node.SetUserID(geteuid());
- + node.SetGroupID(parent != NULL ? parent->Node().GroupID() : getegid());
- + node.SetSize(0);
- + node.SetNumLinks(1);
- + node.SetNumBlocks(volume->BlockSize() / 512);
- +
- + time_t creationTime = real_time_clock();
- + node.SetCreationTime(creationTime);
- + node.SetModificationTime(creationTime);
- + node.SetFlags(0);
- +
- + if (inode->IsDirectory()) {
- + status = inode->InitDirectory(transaction, parent);
- + if (status != B_OK)
- + return status;
- + }
- +
- + inode->WriteBack(transaction);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::DisableFileCache()
- +{
- + TRACE("Inode::DisableFileCache()\n");
- +
- + if (!fCached)
- + return B_OK;
- +
- + file_cache_delete(FileCache());
- + file_map_delete(Map());
- +
- + fCached = false;
- +
- + return B_OK;
- +}
- +
- +
- +void
- +Inode::TransactionDone(bool success)
- +{
- + if (!success) {
- + // Revert any changes to the inode
- + if (UpdateNodeFromDisk() != B_OK)
- + panic("Failed to reload inode from disk!\n");
- + }
- +}
- +
- +
- +void
- +Inode::RemovedFromTransaction()
- +{
- + rw_lock_write_unlock(&fLock);
- +
- + put_vnode(fVolume->FSVolume(), ID());
- +}
- +
- +
- +status_t
- +Inode::_EnlargeDataStream(Transaction& transaction, off_t size)
- +{
- + // TODO: Update fNode.num_blocks
- + if (size < 0)
- + return B_BAD_DATA;
- +
- + TRACE("Inode::_EnlargeDataStream()\n");
- +
- + uint32 blockSize = fVolume->BlockSize();
- + off_t oldSize = Size();
- + off_t maxSize = oldSize;
- + if (maxSize % blockSize != 0)
- + maxSize += blockSize - maxSize % blockSize;
- +
- + if (size <= maxSize) {
- + // No need to allocate more blocks
- + TRACE("Inode::_EnlargeDataStream(): No need to allocate more blocks\n");
- + TRACE("Inode::_EnlargeDataStream(): Setting size to %ld\n", (long)size);
- + fNode.SetSize(size);
- + TRACE("Inode::_EnlargeDataStream(): Size: %ld\n", (long)Size());
- + return B_OK;
- + }
- +
- + off_t bytesNeeded = size - maxSize;
- + uint32 blocksNeeded = (bytesNeeded - 1) / blockSize + 1;
- +
- + if (blocksNeeded > fVolume->NumFreeBlocks()) {
- + TRACE("Inode::_EnlargeDataStream(): Insufficient free blocks. Needed: "
- + "%lu, available: %lu\n", blocksNeeded,
- + (uint32)fVolume->NumFreeBlocks());
- + return B_DEVICE_FULL;
- + }
- +
- + // Discover the last mapped block
- + uint32 pos = 0;
- + off_t lastByte = oldSize == 0 ? 0 : oldSize - 1;
- + if (oldSize != 0) {
- + status_t status = FindBlock(lastByte, pos);
- + if (status != B_OK)
- + return status;
- + }
- +
- + uint32 blockGroup = pos / fVolume->BlocksPerGroup();
- + pos %= fVolume->BlocksPerGroup();
- +
- + // Allocate the required blocks (currently no preallocation)
- + // if we fail, it is assumed the transaction fails, and everything is
- + // reverted
- + while (blocksNeeded > 0) {
- + uint32 length;
- + status_t status = fVolume->AllocateBlocks(transaction, 1, blocksNeeded,
- + blockGroup, pos, length);
- + if (status != B_OK)
- + return status;
- +
- + blocksNeeded -= length;
- +
- + uint32 numBlocks = lastByte / fVolume->BlockSize() + 1;
- + status = _MapBlocksInDataStream(transaction, numBlocks, pos,
- + length, blockGroup);
- + if (status != B_OK)
- + return status;
- + }
- +
- + TRACE("Inode::_EnlargeDataStream(): Setting size to %ld\n", (long)size);
- + fNode.SetSize(size);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::_ShrinkDataStream(Transaction& transaction, off_t size)
- +{
- + TRACE("Inode::_ShrinkDataStream()\n");
- +
- + if (size < 0)
- + return B_BAD_DATA;
- +
- + uint32 blockSize = fVolume->BlockSize();
- + off_t oldSize = Size();
- + off_t lastByte = oldSize == 0 ? 0 : oldSize - 1;
- + off_t minSize = (lastByte / blockSize + 1) * blockSize;
- + // Minimum size that doesn't require freeing blocks
- +
- + if (size > minSize) {
- + // No need to allocate more blocks
- + fNode.SetSize(size);
- + return B_OK;
- + }
- +
- + // Discover the last mapped block
- + uint32 lastBlock;
- + if (oldSize != 0) {
- + status_t status = FindBlock(lastByte, lastBlock);
- + if (status != B_OK)
- + return status;
- + }
- +
- + uint32 freeStart = minSize + 1;
- +
- + uint32 indirectsPerBlock = fVolume->BlockSize() / 4; // 32 bits
- + uint32 indirectsPerBlock2 = indirectsPerBlock * indirectsPerBlock;
- +
- + uint32 maxDirect = EXT2_DIRECT_BLOCKS;
- + uint32 maxIndirect = maxDirect + indirectsPerBlock;
- + uint32 maxDoubleIndirect = maxDirect + indirectsPerBlock + indirectsPerBlock2;
- +
- + ext2_data_stream* dataStream = &fNode.stream;
- +
- + status_t status;
- +
- + if (freeStart < maxDirect) {
- + uint32 directEnd = lastBlock < maxDirect ? lastBlock + 1 : maxDirect;
- +
- + status = _FreeDirectBlocks(transaction, (uint32*)&dataStream[freeStart],
- + (uint32*)&dataStream[directEnd]);
- + if (status != B_OK)
- + return status;
- +
- + if (directEnd != maxDirect) {
- + fNode.SetSize(size);
- + return B_OK;
- + }
- + }
- +
- + CachedBlock cached(fVolume);
- +
- + if (freeStart < maxIndirect && dataStream->Indirect() != 0) {
- + uint32* indirectBlock = (uint32*)cached.SetToWritable(transaction,
- + dataStream->Indirect());
- +
- + if (freeStart >= maxDirect)
- + indirectBlock += freeStart - maxDirect;
- +
- + uint32* indirectBlockEnd = lastBlock < maxIndirect
- + ? &indirectBlock[lastBlock + 1] : &indirectBlock[maxIndirect];
- +
- + status = _FreeIndirectBlock(transaction, indirectBlock,
- + indirectBlockEnd);
- + if (status != B_OK)
- + return status;
- +
- + if (freeStart < maxDirect) {
- + status = fVolume->FreeBlocks(transaction, dataStream->Indirect(), 1);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetIndirect(0);
- + }
- + }
- +
- + if (lastBlock < maxIndirect) {
- + fNode.SetSize(size);
- + return B_OK;
- + }
- +
- + if (freeStart < maxDoubleIndirect && dataStream->DoubleIndirect() != 0) {
- + uint32* doubleIndirectBlock = (uint32*)cached.SetToWritable(
- + transaction, dataStream->DoubleIndirect());
- +
- + if (freeStart >= maxIndirect)
- + doubleIndirectBlock += freeStart - maxIndirect;
- +
- + uint32* doubleIndirectBlockEnd = lastBlock < maxDoubleIndirect
- + ? &doubleIndirectBlock[lastBlock + 1]
- + : &doubleIndirectBlock[maxDoubleIndirect];
- +
- + status = _FreeDoubleIndirectBlock(transaction, doubleIndirectBlock,
- + doubleIndirectBlockEnd);
- + if (status != B_OK)
- + return status;
- +
- + if (freeStart < maxIndirect) {
- + status = fVolume->FreeBlocks(transaction,
- + dataStream->DoubleIndirect(), 1);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetDoubleIndirect(0);
- + }
- + }
- +
- + if (lastBlock < maxDoubleIndirect) {
- + fNode.SetSize(size);
- + return B_OK;
- + }
- +
- + if (dataStream->TripleIndirect() != 0) {
- + uint32* tripleIndirectBlock = (uint32*)cached.SetToWritable(
- + transaction, dataStream->TripleIndirect());
- +
- + if (freeStart >= maxDoubleIndirect)
- + tripleIndirectBlock += freeStart - maxDoubleIndirect;
- +
- + uint32* tripleIndirectBlockEnd = &tripleIndirectBlock[lastBlock + 1];
- +
- + status = _FreeTripleIndirectBlock(transaction, tripleIndirectBlock,
- + tripleIndirectBlockEnd);
- + if (status != B_OK)
- + return status;
- +
- + if (freeStart < maxDoubleIndirect) {
- + status = fVolume->FreeBlocks(transaction,
- + dataStream->TripleIndirect(), 1);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetTripleIndirect(0);
- + }
- + }
- +
- + fNode.SetSize(size);
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::_FreeDirectBlocks(Transaction& transaction, uint32* block,
- + uint32* maxPos)
- +{
- + uint32 start, value, expected;
- +
- + value = B_LENDIAN_TO_HOST_INT32(*block);
- + ++block;
- +
- + status_t status = B_OK;
- + while (status == B_OK && block < maxPos) {
- + start = value;
- + expected = value;
- +
- + while (block < maxPos && expected == value) {
- + value = B_LENDIAN_TO_HOST_INT32(*block);
- + *block = 0;
- +
- + expected++;
- + block++;
- + }
- +
- + status = fVolume->FreeBlocks(transaction, start, expected - start);
- + }
- +
- + return status;
- +}
- +
- +
- +status_t
- +Inode::_FreeIndirectBlock(Transaction& transaction, uint32* indirectBlock,
- + uint32* maxIndirectPos)
- +{
- + // TODO: Ideally, we should group all blocks to be freed to minimize the
- + // number of calls to the block allocator
- +
- + CachedBlock cached(fVolume);
- + uint32 *indirectPos = indirectBlock;
- + uint32 *directBlock;
- + uint32 *directMaxPos;
- +
- + status_t status = B_OK;
- + while (status == B_OK && indirectPos < maxIndirectPos) {
- + uint32 block = B_LENDIAN_TO_HOST_INT32(*indirectPos);
- + *indirectPos = 0;
- +
- + directBlock = (uint32*)cached.SetToWritable(transaction, block);
- + if (directBlock == NULL)
- + return B_IO_ERROR;
- +
- + directMaxPos = (uint32*)((uint8*)directBlock + fVolume->BlockSize());
- +
- + status = _FreeDirectBlocks(transaction, directBlock, directMaxPos);
- + }
- +
- + if (status == B_OK)
- + status = _FreeDirectBlocks(transaction, indirectBlock, maxIndirectPos);
- +
- + return status;
- +}
- +
- +
- +status_t
- +Inode::_FreeDoubleIndirectBlock(Transaction& transaction,
- + uint32* doubleIndirectBlock, uint32* maxDoubleIndirectPos)
- +{
- + // TODO: Ideally, we should group all blocks to be freed to minimize the
- + // number of calls to the block allocator
- +
- + CachedBlock cached(fVolume);
- + uint32 *doubleIndirectPos = doubleIndirectBlock;
- + uint32 *indirectBlock;
- + uint32 *maxIndirectPos;
- +
- + status_t status = B_OK;
- + while (status == B_OK && doubleIndirectPos < maxDoubleIndirectPos) {
- + uint32 block = B_LENDIAN_TO_HOST_INT32(*doubleIndirectPos);
- + *doubleIndirectPos = 0;
- +
- + indirectBlock = (uint32*)cached.SetToWritable(transaction, block);
- + if (indirectBlock == NULL)
- + return B_IO_ERROR;
- +
- + maxIndirectPos = (uint32*)((uint8*)indirectBlock + fVolume->BlockSize());
- +
- + status = _FreeIndirectBlock(transaction, indirectBlock, maxIndirectPos);
- + }
- +
- + if (status == B_OK) {
- + status = _FreeDirectBlocks(transaction, doubleIndirectBlock,
- + maxDoubleIndirectPos);
- + }
- +
- + return status;
- +}
- +
- +
- +status_t
- +Inode::_FreeTripleIndirectBlock(Transaction& transaction,
- + uint32* tripleIndirectBlock, uint32* maxTripleIndirectPos)
- +{
- + // TODO: Ideally, we should group all blocks to be freed to minimize the
- + // number of calls to the block allocator
- +
- + CachedBlock cached(fVolume);
- + uint32 *tripleIndirectPos = tripleIndirectBlock;
- + uint32 *doubleIndirectBlock;
- + uint32 *maxDoubleIndirectPos;
- +
- + status_t status = B_OK;
- + while (status == B_OK && tripleIndirectPos < maxTripleIndirectPos) {
- + uint32 block = B_LENDIAN_TO_HOST_INT32(*tripleIndirectPos);
- + *tripleIndirectPos = 0;
- +
- + doubleIndirectBlock = (uint32*)cached.SetToWritable(transaction, block);
- + if (doubleIndirectBlock == NULL)
- + return B_IO_ERROR;
- +
- + maxDoubleIndirectPos = (uint32*)((uint8*)doubleIndirectBlock
- + + fVolume->BlockSize());
- +
- + status = _FreeDoubleIndirectBlock(transaction, doubleIndirectBlock,
- + maxDoubleIndirectPos);
- + }
- +
- + if (status == B_OK) {
- + status = _FreeDirectBlocks(transaction, tripleIndirectBlock,
- + maxTripleIndirectPos);
- + }
- +
- + return status;
- +}
- +
- +
- +status_t
- +Inode::_GetBlockFromAllocation(Transaction& transaction, uint32& blocksNeeded,
- + uint32& allocated, uint32& allocatedPos, uint32& block)
- +{
- + TRACE("Inode::_GetBlockFromAllocation()\n");
- +
- + if (allocated > 0) {
- + if (blocksNeeded == 0)
- + TRACE("Failed to allocate enough blocks\n");
- +
- + allocated--;
- + block = allocatedPos++;
- +
- + return B_OK;
- + }
- +
- + uint32 blockGroup = allocatedPos / fVolume->BlocksPerGroup();
- + allocatedPos %= fVolume->BlocksPerGroup();
- +
- + status_t status = fVolume->AllocateBlocks(transaction, 1, blocksNeeded,
- + blockGroup, allocatedPos, allocated);
- +
- + allocatedPos += fVolume->BlockSize() * blockGroup;
- +
- + return status;
- +}
- +
- +
- +void
- +Inode::_MapBlocksInIndirectBlock(uint32* block, uint32* maxPos,
- + uint32 increment, uint32& length, uint32& rangePos)
- +{
- + uint32 rangeStart = rangePos;
- +
- + while (length > 0 && block < maxPos) {
- + *block = B_HOST_TO_LENDIAN_INT32(rangePos);
- +
- + rangePos += increment;
- + ++block;
- + --length;
- + }
- +
- + TRACE("Inode::_MapBlocksInIndirectBlock(): Mapped %lu-%lu\n", rangeStart,
- + rangePos);
- +}
- +
- +
- +status_t
- +Inode::_MapBlocksInDoubleIndirectBlock(Transaction& transaction,
- + uint32* doubleIndirectBlock, uint32* maxDoubleIndirectPos,
- + uint32* indirectBlock, uint32* maxIndirectPos, uint32 increment,
- + uint32& blocksNeeded, uint32& allocated, uint32& allocatedPos,
- + uint32& length, uint32& rangePos)
- +{
- + _MapBlocksInIndirectBlock(indirectBlock, maxIndirectPos, increment, length,
- + rangePos);
- + ++doubleIndirectBlock;
- +
- + CachedBlock cached(fVolume);
- +
- + while (length > 0 && doubleIndirectBlock < maxDoubleIndirectPos) {
- + uint32 block = B_LENDIAN_TO_HOST_INT32(*doubleIndirectBlock);
- +
- + if (block == 0) {
- + status_t status = _GetBlockFromAllocation(transaction, blocksNeeded,
- + allocated, allocatedPos, block);
- + if (status != B_OK)
- + return status;
- +
- + *doubleIndirectBlock = B_HOST_TO_LENDIAN_INT32(block);
- + }
- +
- + indirectBlock = (uint32*)cached.SetToWritable(transaction, block);
- + if (indirectBlock == NULL)
- + return B_IO_ERROR;
- +
- + maxIndirectPos = (uint32*)((uint8*)indirectBlock
- + + fVolume->BlockSize());
- +
- + _MapBlocksInIndirectBlock(indirectBlock, maxIndirectPos, increment,
- + length, rangePos);
- + ++doubleIndirectBlock;
- + }
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +Inode::_MapBlocksInDataStream(Transaction& transaction, uint32 mapPos,
- + uint32 rangePos, uint32 length, uint32 preferredBlockGroup)
- +{
- + TRACE("Inode::_MapBlocksInDataStream(): map pos: %lu, range pos: %lu, "
- + "length: %lu, preferred block group: %lu\n", mapPos, rangePos, length,
- + preferredBlockGroup);
- + if (length == 0)
- + return B_OK;
- +
- + uint32 increment = rangePos == 0 ? 0 : 1;
- + uint32 indirectsPerBlock = fVolume->BlockSize() / 4; // 32 bits
- + uint32 indirectsPerBlock2 = indirectsPerBlock * indirectsPerBlock;
- +
- + uint32 maxDirect = EXT2_DIRECT_BLOCKS - 1;
- + uint32 maxIndirect = maxDirect + indirectsPerBlock;
- + uint32 maxDoubleIndirect = maxDirect + indirectsPerBlock + indirectsPerBlock2;
- +
- + ext2_data_stream* dataStream = &fNode.stream;
- + _MapBlocksInIndirectBlock(&dataStream->direct[mapPos],
- + &dataStream->direct[maxDirect], increment, length, rangePos);
- +
- + if (length == 0)
- + return B_OK;
- +
- + // Count the number of blocks that need to be allocated
- + uint32 blocksNeeded = 0;
- + uint32 end = mapPos + length;
- +
- + off_t size = Size();
- + uint32 numBlocks = size == 0 ? 0 : (size - 1) / fVolume->BlockSize() + 1;
- +
- + if (end > numBlocks) {
- + if (dataStream->Indirect() == 0)
- + blocksNeeded++;
- + if (end > maxIndirect) {
- + if (dataStream->DoubleIndirect() == 0)
- + blocksNeeded += 1 + (end - maxIndirect) / indirectsPerBlock;
- + else
- + blocksNeeded += (end - numBlocks) / indirectsPerBlock;
- + }
- + if (end > maxDoubleIndirect) {
- + if (dataStream->TripleIndirect() == 0)
- + blocksNeeded += 1 + (end - maxDoubleIndirect) / indirectsPerBlock2;
- + else
- + blocksNeeded += (end - numBlocks) / indirectsPerBlock2;
- + }
- + }
- +
- + // Prepare for block allocation
- + if (fVolume->NumFreeBlocks() < blocksNeeded) {
- + TRACE("Not enough blocks to enlarge data stream\n");
- + return B_DEVICE_FULL;
- + }
- +
- + uint32 allocated = 0;
- + uint32 allocatedPos = preferredBlockGroup * fVolume->BlockSize();
- +
- + // Prepare blocks
- + uint32* indirectBlock = NULL;
- + uint32* doubleIndirectBlock = NULL;
- + uint32* tripleIndirectBlock = NULL;
- +
- + uint32* maxIndirectPos = NULL;
- + uint32* maxDoubleIndirectPos = NULL;
- + uint32* maxTripleIndirectPos = NULL;
- +
- + CachedBlock cachedIndirect(fVolume);
- + CachedBlock cachedDoubleIndirect(fVolume);
- + CachedBlock cachedTripleIndirect(fVolume);
- +
- + uint32 block = dataStream->Indirect();
- + if (block == 0) {
- + status_t status = _GetBlockFromAllocation(transaction, blocksNeeded,
- + allocated, allocatedPos, block);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetIndirect(block);
- + }
- + indirectBlock = (uint32*)cachedIndirect.SetToWritable(transaction, block);
- + maxIndirectPos = (uint32*)((uint8*)indirectBlock + fVolume->BlockSize());
- +
- + if (end > maxIndirect) {
- + // Reaches double indirect blocks
- + block = dataStream->DoubleIndirect();
- + if (block == 0) {
- + status_t status = _GetBlockFromAllocation(transaction,
- + blocksNeeded, allocated, allocatedPos, block);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetDoubleIndirect(block);
- + }
- +
- + doubleIndirectBlock = (uint32*)cachedDoubleIndirect.SetToWritable(
- + transaction, block);
- + maxDoubleIndirectPos = (uint32*)((uint8*)doubleIndirectBlock
- + + fVolume->BlockSize());
- +
- + if (end > maxDoubleIndirect) {
- + // Reaches triple indirect blocks
- + block = dataStream->TripleIndirect();
- + if (block == 0) {
- + status_t status = _GetBlockFromAllocation(transaction,
- + blocksNeeded, allocated, allocatedPos, block);
- + if (status != B_OK)
- + return status;
- +
- + dataStream->SetTripleIndirect(block);
- + }
- +
- + tripleIndirectBlock = (uint32*)cachedTripleIndirect.SetToWritable(
- + transaction, block);
- + maxTripleIndirectPos = (uint32*)((uint8*)tripleIndirectBlock
- + + fVolume->BlockSize());
- + }
- + }
- +
- + indirectBlock += mapPos - maxDirect;
- + doubleIndirectBlock += (mapPos - maxIndirect) / indirectsPerBlock;
- + tripleIndirectBlock += (mapPos - maxDoubleIndirect) / indirectsPerBlock2;
- +
- + // Perform the mapping
- + status_t status = _MapBlocksInDoubleIndirectBlock(transaction,
- + doubleIndirectBlock, maxDoubleIndirectPos, indirectBlock,
- + maxIndirectPos, increment, blocksNeeded, allocated, allocatedPos,
- + length, rangePos);
- + if (status != B_OK)
- + return status;
- +
- + ++tripleIndirectBlock;
- +
- + while (length > 0 && tripleIndirectBlock < maxTripleIndirectPos) {
- + uint32 block = B_LENDIAN_TO_HOST_INT32(*tripleIndirectBlock);
- +
- + if (block == 0) {
- + status = _GetBlockFromAllocation(transaction, blocksNeeded,
- + allocated, allocatedPos, block);
- + if (status != B_OK)
- + return status;
- +
- + *tripleIndirectBlock = B_HOST_TO_LENDIAN_INT32(block);
- + }
- +
- + doubleIndirectBlock = (uint32*)cachedDoubleIndirect.SetToWritable(
- + transaction, block);
- + if (doubleIndirectBlock == NULL)
- + return B_IO_ERROR;
- +
- + maxDoubleIndirectPos = (uint32*)((uint8*)doubleIndirectBlock
- + + fVolume->BlockSize());
- +
- + status_t status = _MapBlocksInDoubleIndirectBlock(transaction,
- + doubleIndirectBlock, maxDoubleIndirectPos, indirectBlock,
- + maxIndirectPos, increment, blocksNeeded, allocated, allocatedPos,
- + length, rangePos);
- + if (status != B_OK)
- + return status;
- +
- + ++tripleIndirectBlock;
- + }
- +
- + return B_OK;
- +}
- Index: src/add-ons/kernel/file_systems/ext2/HashRevokeManager.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HashRevokeManager.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/HashRevokeManager.h (revision 0)
- @@ -0,0 +1,47 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef HASHREVOKEMANAGER_H
- +#define HASHREVOKEMANAGER_H
- +
- +#include <util/khash.h>
- +
- +#include "RevokeManager.h"
- +
- +
- +struct RevokeElement {
- + RevokeElement* next; // Next in hash
- + uint32 block;
- + uint32 commitID;
- +};
- +
- +
- +class HashRevokeManager : public RevokeManager {
- +public:
- + HashRevokeManager();
- + virtual ~HashRevokeManager();
- +
- + status_t Init();
- +
- + virtual status_t Insert(uint32 block, uint32 commitID);
- + virtual status_t Remove(uint32 block);
- + virtual bool Lookup(uint32 block, uint32 commitID);
- +
- + static int Compare(void* element, const void* key);
- + static uint32 Hash(void* element, const void* key, uint32 range);
- +
- +protected:
- + status_t _ForceInsert(uint32 block, uint32 commitID);
- +
- +private:
- + hash_table* fHash;
- +
- + const int kInitialHashSize;
- +};
- +
- +#endif // HASHREVOKEMANAGER_H
- +
- Property changes on: src/add-ons/kernel/file_systems/ext2/HashRevokeManager.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp (working copy)
- @@ -11,12 +11,17 @@
- #include <AutoDeleter.h>
- #include <fs_cache.h>
- #include <fs_info.h>
- +#include <io_requests.h>
- +#include <NodeMonitor.h>
- #include "AttributeIterator.h"
- +#include "CachedBlock.h"
- #include "DirectoryIterator.h"
- #include "ext2.h"
- #include "HTree.h"
- #include "Inode.h"
- +#include "Journal.h"
- +#include "Utility.h"
- //#define TRACE_EXT2
- @@ -35,23 +40,29 @@
- };
- -/*! Converts the open mode, the open flags given to bfs_open(), into
- - access modes, e.g. since O_RDONLY requires read access to the
- - file, it will be converted to R_OK.
- -*/
- -int
- -open_mode_to_access(int openMode)
- +//! ext2_io() callback hook
- +static status_t
- +iterative_io_get_vecs_hook(void* cookie, io_request* request, off_t offset,
- + size_t size, struct file_io_vec* vecs, size_t* _count)
- {
- - openMode &= O_RWMASK;
- - if (openMode == O_RDONLY)
- - return R_OK;
- - else if (openMode == O_WRONLY)
- - return W_OK;
- + Inode* inode = (Inode*)cookie;
- - return R_OK | W_OK;
- + return file_map_translate(inode->Map(), offset, size, vecs, _count,
- + inode->GetVolume()->BlockSize());
- }
- +//! ext2_io() callback hook
- +static status_t
- +iterative_io_finished_hook(void* cookie, io_request* request, status_t status,
- + bool partialTransfer, size_t bytesTransferred)
- +{
- + Inode* inode = (Inode*)cookie;
- + rw_lock_read_unlock(inode->Lock());
- + return B_OK;
- +}
- +
- +
- // #pragma mark - Scanning
- @@ -116,6 +127,7 @@
- status_t status = volume->Mount(device, flags);
- if (status != B_OK) {
- + TRACE("Failed mounting the volume. Error: %s\n", strerror(status));
- delete volume;
- return status;
- }
- @@ -148,7 +160,7 @@
- info->io_size = EXT2_IO_SIZE;
- info->block_size = volume->BlockSize();
- info->total_blocks = volume->NumBlocks();
- - info->free_blocks = volume->FreeBlocks();
- + info->free_blocks = volume->NumFreeBlocks();
- // Volume name
- strlcpy(info->volume_name, volume->Name(), sizeof(info->volume_name));
- @@ -253,6 +265,81 @@
- static status_t
- +ext2_write_pages(fs_volume* _volume, fs_vnode* _node, void* _cookie,
- + off_t pos, const iovec* vecs, size_t count, size_t* _numBytes)
- +{
- + Volume* volume = (Volume*)_volume->private_volume;
- + Inode* inode = (Inode*)_node->private_node;
- +
- + if (volume->IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + if (inode->FileCache() == NULL)
- + return B_BAD_VALUE;
- +
- + rw_lock_read_lock(inode->Lock());
- +
- + uint32 vecIndex = 0;
- + size_t vecOffset = 0;
- + size_t bytesLeft = *_numBytes;
- + status_t status;
- +
- + while (true) {
- + file_io_vec fileVecs[8];
- + size_t fileVecCount = 8;
- +
- + status = file_map_translate(inode->Map(), pos, bytesLeft, fileVecs,
- + &fileVecCount, 0);
- + if (status != B_OK && status != B_BUFFER_OVERFLOW)
- + break;
- +
- + bool bufferOverflow = status == B_BUFFER_OVERFLOW;
- +
- + size_t bytes = bytesLeft;
- + status = write_file_io_vec_pages(volume->Device(), fileVecs,
- + fileVecCount, vecs, count, &vecIndex, &vecOffset, &bytes);
- + if (status != B_OK || !bufferOverflow)
- + break;
- +
- + pos += bytes;
- + bytesLeft -= bytes;
- + }
- +
- + rw_lock_read_unlock(inode->Lock());
- +
- + return status;
- +}
- +
- +
- +static status_t
- +ext2_io(fs_volume* _volume, fs_vnode* _node, void* _cookie, io_request* request)
- +{
- + Volume* volume = (Volume*)_volume->private_volume;
- + Inode* inode = (Inode*)_node->private_node;
- +
- +#ifndef EXT2_SHELL
- + if (io_request_is_write(request) && volume->IsReadOnly()) {
- + notify_io_request(request, B_READ_ONLY_DEVICE);
- + return B_READ_ONLY_DEVICE;
- + }
- +#endif
- +
- + if (inode->FileCache() == NULL) {
- +#ifndef EXT2_SHELL
- + notify_io_request(request, B_BAD_VALUE);
- +#endif
- + return B_BAD_VALUE;
- + }
- +
- + // We lock the node here and will unlock it in the "finished" hook.
- + rw_lock_read_lock(inode->Lock());
- +
- + return do_iterative_fd_io(volume->Device(), request,
- + iterative_io_get_vecs_hook, iterative_io_finished_hook, inode);
- +}
- +
- +
- +static status_t
- ext2_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
- size_t size, struct file_io_vec* vecs, size_t* _count)
- {
- @@ -294,7 +381,7 @@
- if (size <= vecs[index - 1].length || offset >= inode->Size()) {
- // We're done!
- *_count = index;
- - TRACE("ext2_get_file_map for inode %ld\n", inode->ID());
- + TRACE("ext2_get_file_map for inode %ld\n", (long)inode->ID());
- return B_OK;
- }
- }
- @@ -311,6 +398,8 @@
- ext2_lookup(fs_volume* _volume, fs_vnode* _directory, const char* name,
- ino_t* _vnodeID)
- {
- + TRACE("ext2_lookup: name address: %p\n", name);
- + TRACE("ext2_lookup: name: %s\n", name);
- Volume* volume = (Volume*)_volume->private_volume;
- Inode* directory = (Inode*)_directory->private_node;
- @@ -328,19 +417,71 @@
- ObjectDeleter<DirectoryIterator> iteratorDeleter(iterator);
- - while (true) {
- - char buffer[B_FILE_NAME_LENGTH];
- - size_t length = sizeof(buffer);
- - status = iterator->GetNext(buffer, &length, _vnodeID);
- - if (status != B_OK)
- - return status;
- - TRACE("ext2_lookup() %s\n", buffer);
- + status = iterator->FindEntry(name, _vnodeID);
- + if (status != B_OK)
- + return status;
- +
- + return get_vnode(volume->FSVolume(), *_vnodeID, NULL);
- +}
- - if (!strcmp(buffer, name))
- - break;
- +void
- +transaction_written(int32 id, int32, void*)
- +{
- + TRACE("transaction_written: %ld\n", id);
- +}
- +
- +static status_t
- +ext2_ioctl(fs_volume* _volume, fs_vnode* _node, void* _cookie, uint32 cmd,
- + void* buffer, size_t bufferLength)
- +{
- + TRACE("ioctl: %lu\n", cmd);
- +
- + Volume* volume = (Volume*)_volume->private_volume;
- + switch (cmd) {
- + case 56742:
- + {
- + TRACE("ioctl: Test the block allocator\n");
- + // Test the block allocator
- + TRACE("ioctl: Creating transaction\n");
- + Transaction transaction(volume->GetJournal());
- + TRACE("ioctl: Creating cached block\n");
- + CachedBlock cached(volume);
- + uint32 blocksPerGroup = volume->BlocksPerGroup();
- + uint32 blockSize = volume->BlockSize();
- + uint32 firstBlock = volume->FirstDataBlock();
- + uint32 start = 0;
- + uint32 group = 0;
- + uint32 length;
- +
- + TRACE("ioctl: blocks per group: %lu, block size: %lu, "
- + "first block: %lu, start: %lu, group: %lu\n", blocksPerGroup,
- + blockSize, firstBlock, start, group);
- +
- + while (volume->AllocateBlocks(transaction, 1, 2048, group, start,
- + length) == B_OK) {
- + TRACE("ioctl: Allocated blocks in group %lu: %lu-%lu\n", group,
- + start, start + length);
- + uint32 blockNum = start + group * blocksPerGroup - firstBlock;
- +
- + for (uint32 i = 0; i < length; ++i) {
- + uint8* block = cached.SetToWritable(transaction, blockNum);
- + memset(block, 0, blockSize);
- + blockNum++;
- + }
- +
- + TRACE("ioctl: Blocks cleared\n");
- +
- + transaction.Done();
- + transaction.Start(volume->GetJournal());
- + }
- +
- + TRACE("ioctl: Done\n");
- +
- + return B_OK;
- + }
- }
- - return get_vnode(volume->FSVolume(), *_vnodeID, NULL);
- + return B_OK;
- }
- @@ -371,7 +512,146 @@
- }
- +status_t
- +ext2_write_stat(fs_volume* _volume, fs_vnode* _node, const struct stat* stat,
- + uint32 mask)
- +{
- + TRACE("ext2_write_stat\n");
- + Volume* volume = (Volume*)_volume->private_volume;
- +
- + if (volume->IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + Inode* inode = (Inode*)_node->private_node;
- +
- + status_t status = inode->CheckPermissions(W_OK);
- + if (status < B_OK)
- + return status;
- +
- + TRACE("ext2_write_stat: Starting transaction\n");
- + Transaction transaction(volume->GetJournal());
- + TRACE("ext2_write_stat: Finishing transaction\n");
- + transaction.Done(true);
- + TRACE("ext2_write_stat: Syncing\n");
- + volume->GetJournal()->FlushLogAndBlocks();
- + TRACE("ext2_write_stat: Done\n");
- + //inode->WriteLockInTransaction(transaction);
- +
- + if ((mask & B_STAT_SIZE) != 0) {
- + if (inode->IsDirectory())
- + return B_IS_A_DIRECTORY;
- + if (!inode->IsFile())
- + return B_BAD_VALUE;
- +
- + TRACE("ext2_write_stat: Old size: %ld, new size: %ld\n", (long)inode->Size(),
- + (long)stat->st_size);
- + if (inode->Size() != stat->st_size) {
- + off_t oldSize = inode->Size();
- +
- + //status = inode->Resize(transaction, stat->st_size);
- + // if(status != B_OK)
- + return status;
- + }
- + }
- +
- + return B_NOT_ALLOWED;
- +}
- +
- +
- static status_t
- +ext2_create(fs_volume* _volume, fs_vnode* _directory, const char* name,
- + int openMode, int mode, void** _cookie, ino_t* _vnodeID)
- +{
- + Volume* volume = (Volume*)_volume->private_volume;
- + Inode* directory = (Inode*)_directory->private_node;
- +
- + if (volume->IsReadOnly())
- + return B_READ_ONLY_DEVICE;
- +
- + if (!directory->IsDirectory())
- + return B_BAD_TYPE;
- +
- + // Allocate cookie
- + /*file_cookie* cookie = new(std::nothrow) file_cookie;
- + if (cookie == NULL)
- + return B_NO_MEMORY;
- +
- + cookie->open_mode = openMode;
- + cookie->last_size = 0;
- + cookie->last_notification = system_time();*/
- +
- + Transaction transaction(volume->GetJournal());
- +
- + Inode* inode;
- + bool created;
- + status_t status = Inode::Create(transaction, directory, name,
- + S_FILE | (mode & S_IUMSK), openMode, 0, &created, _vnodeID, &inode);
- +
- + if (status == B_OK && (openMode & O_NOCACHE) != 0
- + && inode->IsFileCacheDisabled()) {
- + status = inode->DisableFileCache();
- + }
- +
- + entry_cache_add(volume->ID(), directory->ID(), name, *_vnodeID);
- +
- + if (status != B_OK) {
- + entry_cache_remove(volume->ID(), directory->ID(), name);
- + //delete cookie;
- +
- + return status;
- + }
- +
- + //*_cookie = cookie;
- +
- + if (created)
- + notify_entry_created(volume->ID(), directory->ID(), name, *_vnodeID);
- +
- + return B_OK;
- +}
- +
- +
- +static status_t
- +ext2_unlink(fs_volume* _volume, fs_vnode* _directory, const char* name)
- +{
- + if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
- + return B_NOT_ALLOWED;
- +
- + Volume* volume = (Volume*)_volume->private_volume;
- + Inode* directory = (Inode*)_directory->private_node;
- +
- + status_t status = directory->CheckPermissions(W_OK);
- + if (status != B_OK)
- + return status;
- +
- + HTree htree(volume, directory);
- + DirectoryIterator* directoryIterator;
- +
- + status = htree.Lookup(name, &directoryIterator);
- + if (status != B_OK)
- + return status;
- +
- + ino_t id;
- +
- + status = directoryIterator->FindEntry(name, &id);
- + if (status != B_OK)
- + return status;
- +
- + Transaction transaction(volume->GetJournal());
- +
- + Inode inode(volume, id);
- + //status = inode.Unlink(transaction);
- + if (status != B_OK)
- + return status;
- +
- + status = directoryIterator->RemoveEntry(transaction);
- + if (status != B_OK)
- + return status;
- +
- + return B_OK;
- +}
- +
- +
- +static status_t
- ext2_open(fs_volume* _volume, fs_vnode* _node, int openMode, void** _cookie)
- {
- Inode* inode = (Inode*)_node->private_node;
- @@ -477,13 +757,17 @@
- size_t length = bufferSize;
- ino_t id;
- - status_t status = iterator->GetNext(dirent->d_name, &length, &id);
- + status_t status = iterator->Get(dirent->d_name, &length, &id);
- if (status == B_ENTRY_NOT_FOUND) {
- *_num = 0;
- return B_OK;
- } else if (status != B_OK)
- return status;
- + status = iterator->Next();
- + if (status != B_OK && status != B_ENTRY_NOT_FOUND)
- + return status;
- +
- Volume* volume = (Volume*)_volume->private_volume;
- dirent->d_dev = volume->ID();
- @@ -748,8 +1032,8 @@
- &ext2_get_file_map,
- + &ext2_ioctl,
- NULL,
- - NULL,
- NULL, // fs_select
- NULL, // fs_deselect
- NULL,
- @@ -763,7 +1047,7 @@
- &ext2_access,
- &ext2_read_stat,
- - NULL,
- + &ext2_write_stat,
- /* file operations */
- NULL,
- Index: src/add-ons/kernel/file_systems/ext2/InodeAllocator.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/InodeAllocator.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/InodeAllocator.h (revision 0)
- @@ -0,0 +1,40 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef INODEALLOCATOR_H
- +#define INODEALLOCATOR_H
- +
- +#include <lock.h>
- +
- +#include "Transaction.h"
- +
- +
- +class Inode;
- +class Volume;
- +
- +
- +class InodeAllocator {
- +public:
- + InodeAllocator(Volume* volume);
- + virtual ~InodeAllocator();
- +
- + virtual status_t New(Transaction& transaction, Inode* parent,
- + int32 mode, ino_t& id);
- +
- +private:
- + status_t _Allocate(Transaction& transaction,
- + uint32 prefferedBlockGroup, ino_t& id);
- + status_t _MarkInBitmap(Transaction& transaction,
- + uint32 bitmapBlock, uint32 blockGroup,
- + uint32 numInodes, ino_t& id);
- +
- +
- + Volume* fVolume;
- + mutex fLock;
- +};
- +
- +#endif // INODEALLOCATOR_H
- Property changes on: src/add-ons/kernel/file_systems/ext2/InodeAllocator.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/NoJournal.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/NoJournal.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/NoJournal.cpp (revision 0)
- @@ -0,0 +1,100 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "NoJournal.h"
- +
- +#include <string.h>
- +
- +#include <fs_cache.h>
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +NoJournal::NoJournal(Volume* volume)
- + :
- + Journal()
- +{
- + fFilesystemVolume = volume;
- + fFilesystemBlockCache = volume->BlockCache();
- + fJournalVolume = volume;
- + fHasSubTransaction = false;
- + fSeparateSubTransactions = false;
- +}
- +
- +
- +NoJournal::~NoJournal()
- +{
- +}
- +
- +
- +status_t
- +NoJournal::InitCheck()
- +{
- + return B_OK;
- +}
- +
- +
- +status_t
- +NoJournal::Recover()
- +{
- + return B_OK;
- +}
- +
- +
- +status_t
- +NoJournal::StartLog()
- +{
- + return B_OK;
- +}
- +
- +
- +status_t
- +NoJournal::Lock(Transaction* owner, bool separateSubTransactions)
- +{
- + status_t status = block_cache_sync(fFilesystemBlockCache);
- + TRACE("NoJournal::Lock(): block_cache_sync: %s\n", strerror(status));
- +
- + if (status == B_OK)
- + status = Journal::Lock(owner, separateSubTransactions);
- +
- + return status;
- +}
- +
- +
- +status_t
- +NoJournal::Unlock(Transaction* owner, bool success)
- +{
- + TRACE("NoJournal::Unlock\n");
- + return Journal::Unlock(owner, success);
- +}
- +
- +
- +status_t
- +NoJournal::_WriteTransactionToLog()
- +{
- + TRACE("NoJournal::_WriteTransactionToLog(): Ending transaction %ld\n",
- + fTransactionID);
- +
- + fTransactionID = cache_end_transaction(fFilesystemBlockCache,
- + fTransactionID, _TransactionWritten, NULL);
- +
- + return B_OK;
- +}
- +
- +
- +/*static*/ void
- +NoJournal::_TransactionWritten(int32 transactionID, int32 event, void* param)
- +{
- + TRACE("Transaction %ld checkpointed\n", transactionID);
- +}
- Index: src/add-ons/kernel/file_systems/ext2/HTree.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HTree.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/HTree.cpp (working copy)
- @@ -7,6 +7,7 @@
- */
- +#include "CachedBlock.h"
- #include "HTree.h"
- #include <new>
- @@ -17,6 +18,8 @@
- #include "Volume.h"
- +//#define COLLISION_TEST
- +
- //#define TRACE_EXT2
- #ifdef TRACE_EXT2
- # define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- @@ -75,90 +78,119 @@
- HTree::~HTree()
- {
- + delete fRootEntry;
- }
- status_t
- +HTree::PrepareForHash()
- +{
- + uint32 blockNum;
- + status_t status = fDirectory->FindBlock(0, blockNum);
- + if (status != B_OK)
- + return status;
- +
- + CachedBlock cached(fDirectory->GetVolume());
- + const uint8* block = cached.SetTo(blockNum);
- +
- + HTreeRoot* root = (HTreeRoot*)block;
- +
- + if (root == NULL)
- + return B_IO_ERROR;
- + if (!root->IsValid())
- + return B_BAD_DATA;
- +
- + fHashVersion = root->hash_version;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- HTree::Lookup(const char* name, DirectoryIterator** iterator)
- {
- + TRACE("HTree::Lookup()\n");
- if (!fIndexed || (name[0] == '.'
- && (name[1] == '\0' || (name[1] == '.' && name[2] == '0')))) {
- // No HTree support or looking for trivial directories
- - // TODO: Does these directories get hashed?
- - *iterator = new(std::nothrow) DirectoryIterator(fDirectory);
- -
- - if (*iterator == NULL)
- - return B_NO_MEMORY;
- - return B_OK;
- + return _FallbackToLinearIteration(iterator);
- }
- - HTreeRoot root;
- - size_t length = sizeof(root);
- + uint32 blockNum;
- + status_t status = fDirectory->FindBlock(0, blockNum);
- + if (status != B_OK)
- + return _FallbackToLinearIteration(iterator);
- +
- + CachedBlock cached(fDirectory->GetVolume());
- + const uint8* block = cached.SetTo(blockNum);
- +
- + HTreeRoot* root = (HTreeRoot*)block;
- - status_t status = fDirectory->ReadAt(0, (uint8*)&root, &length);
- - if (status < B_OK)
- - return status;
- + if (root == NULL || !root->IsValid())
- + return _FallbackToLinearIteration(iterator);
- +
- + fHashVersion = root->hash_version;
- - if (length != sizeof(root) || !root.IsValid()) {
- - // Fallback to linear search
- - *iterator = new(std::nothrow) DirectoryIterator(fDirectory);
- - if (*iterator == NULL)
- - return B_NO_MEMORY;
- -
- - return B_OK;
- - }
- + size_t _nameLength = strlen(name);
- + uint8 nameLength = _nameLength >= 256 ? 255 : (uint8)_nameLength;
- +
- + uint32 hash = Hash(name, nameLength);
- - uint32 hash = _Hash(name, root.hash_version);
- -
- - off_t start = (off_t)root.root_info_length
- + off_t start = (off_t)root->root_info_length
- + 2 * (sizeof(HTreeFakeDirEntry) + 4);
- + delete fRootEntry;
- +
- fRootEntry = new(std::nothrow) HTreeEntryIterator(start, fDirectory);
- if (fRootEntry == NULL)
- return B_NO_MEMORY;
- - fRootDeleter.SetTo(fRootEntry);
- status = fRootEntry->Init();
- if (status != B_OK)
- return status;
- - return fRootEntry->Lookup(hash, (uint32)root.indirection_levels, iterator);
- + return fRootEntry->Lookup(hash, (uint32)root->indirection_levels, iterator);
- }
- uint32
- -HTree::_Hash(const char* name, uint8 version)
- +HTree::Hash(const char* name, uint8 length)
- {
- uint32 hash;
- - switch (version) {
- +#ifndef COLLISION_TEST
- + switch (fHashVersion) {
- case HTREE_HASH_LEGACY:
- - hash = _HashLegacy(name);
- + hash = _HashLegacy(name, length);
- break;
- case HTREE_HASH_HALF_MD4:
- - hash = _HashHalfMD4(name);
- + hash = _HashHalfMD4(name, length);
- break;
- case HTREE_HASH_TEA:
- - hash = _HashTEA(name);
- + hash = _HashTEA(name, length);
- break;
- default:
- panic("Hash verification succeeded but then failed?");
- hash = 0;
- };
- +#else
- + hash = 0;
- +#endif
- - TRACE("Filename hash: %u\n", hash);
- + TRACE("HTree::_Hash(): filename hash 0x%lX\n", hash);
- return hash & ~1;
- }
- uint32
- -HTree::_HashLegacy(const char* name)
- +HTree::_HashLegacy(const char* name, uint8 length)
- {
- + TRACE("HTree::_HashLegacy()\n");
- uint32 hash = 0x12a3fe2d;
- uint32 previous = 0x37abe8f9;
- - for (; *name != '\0'; ++name) {
- + for (; length > 0; --length, ++name) {
- uint32 next = previous + (hash ^ (*name * 7152373));
- if ((next & 0x80000000) != 0)
- @@ -168,7 +200,7 @@
- hash = next;
- }
- - return hash;
- + return hash << 1;
- }
- @@ -230,8 +262,8 @@
- shifts[2] = 9;
- shifts[3] = 13;
- - for (int j = 0; j < 2; ++j) {
- - for (int i = j; i < 4; i += 2) {
- + for (int j = 1; j >= 0; --j) {
- + for (int i = j; i < 8; i += 2) {
- a += _MD4G(b, c, d) + blocks[i] + 013240474631UL;
- uint32 shift = shifts[i / 2];
- a = (a << shift) | (a >> (32 - shift));
- @@ -247,13 +279,13 @@
- for (int i = 0; i < 4; ++i) {
- a += _MD4H(b, c, d) + blocks[3 - i] + 015666365641UL;
- - uint32 shift = shifts[i*2];
- + uint32 shift = shifts[i * 2 % 4];
- a = (a << shift) | (a >> (32 - shift));
- _MD4RotateVars(a, b, c, d);
- a += _MD4H(b, c, d) + blocks[7 - i] + 015666365641UL;
- - shift = shifts[i*2 + 1];
- + shift = shifts[(i * 2 + 1) % 4];
- a = (a << shift) | (a >> (32 - shift));
- _MD4RotateVars(a, b, c, d);
- @@ -267,19 +299,21 @@
- uint32
- -HTree::_HashHalfMD4(const char* name)
- +HTree::_HashHalfMD4(const char* name, uint8 _length)
- {
- + TRACE("HTree::_HashHalfMD4()\n");
- uint32 buffer[4];
- + int32 length = (uint32)_length;
- buffer[0] = fHashSeed[0];
- buffer[1] = fHashSeed[1];
- buffer[2] = fHashSeed[2];
- buffer[3] = fHashSeed[3];
- - for (int length = strlen(name); length > 0; length -= 32) {
- + for (; length > 0; length -= 32) {
- uint32 blocks[8];
- - _PrepareBlocksForHash(name, length, blocks, 8);
- + _PrepareBlocksForHash(name, (uint32)length, blocks, 8);
- _HalfMD4Transform(buffer, blocks);
- name += 32;
- @@ -316,19 +350,21 @@
- uint32
- -HTree::_HashTEA(const char* name)
- +HTree::_HashTEA(const char* name, uint8 _length)
- {
- + TRACE("HTree::_HashTEA()\n");
- uint32 buffer[4];
- + int32 length = _length;
- buffer[0] = fHashSeed[0];
- buffer[1] = fHashSeed[1];
- buffer[2] = fHashSeed[2];
- buffer[3] = fHashSeed[3];
- - for (int length = strlen(name); length > 0; length -= 16) {
- + for (; length > 0; length -= 16) {
- uint32 blocks[4];
- - _PrepareBlocksForHash(name, length, blocks, 4);
- + _PrepareBlocksForHash(name, (uint32)length, blocks, 4);
- TRACE("_HashTEA %lx %lx %lx\n", blocks[0], blocks[1], blocks[2]);
- _TEATransform(buffer, blocks);
- @@ -340,21 +376,21 @@
- void
- -HTree::_PrepareBlocksForHash(const char* string, int length, uint32* blocks,
- - int numBlocks)
- +HTree::_PrepareBlocksForHash(const char* string, uint32 length, uint32* blocks,
- + uint32 numBlocks)
- {
- uint32 padding = (uint32)length;
- padding = (padding << 8) | padding;
- padding = (padding << 16) | padding;
- - int numBytes = numBlocks * 4;
- + uint32 numBytes = numBlocks * 4;
- if (length > numBytes)
- length = numBytes;
- - int completeIterations = length / 4;
- + uint32 completeIterations = length / 4;
- - for (int i = 0; i < completeIterations; ++i) {
- - uint32 value = 0 | *(string++);
- + for (uint32 i = 0; i < completeIterations; ++i) {
- + uint32 value = (padding << 8) | *(string++);
- value = (value << 8) | *(string++);
- value = (value << 8) | *(string++);
- value = (value << 8) | *(string++);
- @@ -362,15 +398,24 @@
- }
- if (completeIterations < numBlocks) {
- - int remainingBytes = length % 4;
- + uint32 remainingBytes = length % 4;
- uint32 value = padding;
- - for (int i = 0; i < remainingBytes; ++i)
- + for (uint32 i = 0; i < remainingBytes; ++i)
- value = (value << 8) + *(string++);
- blocks[completeIterations] = value;
- - for (int i = completeIterations + 1; i < numBlocks; ++i)
- + for (uint32 i = completeIterations + 1; i < numBlocks; ++i)
- blocks[i] = padding;
- }
- }
- +
- +
- +/*inline*/ status_t
- +HTree::_FallbackToLinearIteration(DirectoryIterator** iterator)
- +{
- + *iterator = new(std::nothrow) DirectoryIterator(fDirectory);
- +
- + return *iterator == NULL ? B_NO_MEMORY : B_OK;
- +}
- Property changes on: src/add-ons/kernel/file_systems/ext2/HTree.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/HTreeEntryIterator.h (working copy)
- @@ -14,6 +14,9 @@
- #include "DirectoryIterator.h"
- +class Volume;
- +
- +
- class HTreeEntryIterator {
- public:
- HTreeEntryIterator(off_t offset,
- @@ -26,7 +29,10 @@
- DirectoryIterator** iterator);
- bool HasCollision() { return fHasCollision; }
- - status_t GetNext(off_t& offset);
- + status_t GetNext(uint32& offset);
- +
- + status_t InsertEntry(uint32 hash, uint32 block,
- + bool hasCollision);
- private:
- HTreeEntryIterator(uint32 block,
- uint32 blockSize, Inode* directory,
- @@ -34,17 +40,20 @@
- bool hasCollision);
- private:
- + Inode* fDirectory;
- + Volume* fVolume;
- + status_t fInitStatus;
- +
- bool fHasCollision;
- uint16 fLimit, fCount;
- + uint16 fFirstEntry;
- + uint16 fCurrentEntry;
- uint32 fBlockSize;
- - Inode* fDirectory;
- - off_t fOffset;
- - off_t fMaxOffset;
- + uint32 fBlockNum;
- HTreeEntryIterator* fParent;
- HTreeEntryIterator* fChild;
- - ObjectDeleter<HTreeEntryIterator> fChildDeleter;
- };
- #endif // HTREE_ENTRY_ITERATOR_H
- Index: src/add-ons/kernel/file_systems/ext2/Volume.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Volume.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/Volume.h (working copy)
- @@ -9,8 +9,12 @@
- #include <lock.h>
- #include "ext2.h"
- +#include "BlockAllocator.h"
- +#include "InodeAllocator.h"
- +#include "Transaction.h"
- class Inode;
- +class Journal;
- enum volume_flags {
- @@ -18,7 +22,7 @@
- };
- -class Volume {
- +class Volume : public TransactionListener {
- public:
- Volume(fs_volume* volume);
- ~Volume();
- @@ -40,31 +44,63 @@
- uint32 NumInodes() const
- { return fNumInodes; }
- + uint32 NumGroups() const
- + { return fNumGroups; }
- off_t NumBlocks() const
- { return fSuperBlock.NumBlocks(); }
- - off_t FreeBlocks() const
- - { return fSuperBlock.FreeBlocks(); }
- + off_t NumFreeBlocks() const
- + { return fFreeBlocks; }
- + uint32 FirstDataBlock() const
- + { return fFirstDataBlock; }
- uint32 BlockSize() const { return fBlockSize; }
- uint32 BlockShift() const { return fBlockShift; }
- + uint32 BlocksPerGroup() const
- + { return fSuperBlock.BlocksPerGroup(); }
- uint32 InodeSize() const
- { return fSuperBlock.InodeSize(); }
- + uint32 InodesPerGroup() const
- + { return fSuperBlock.InodesPerGroup(); }
- ext2_super_block& SuperBlock() { return fSuperBlock; }
- status_t GetInodeBlock(ino_t id, uint32& block);
- uint32 InodeBlockIndex(ino_t id) const;
- status_t GetBlockGroup(int32 index,
- ext2_block_group** _group);
- -
- +
- + Journal* GetJournal() { return fJournal; }
- +
- bool IndexedDirectories() const
- { return (fSuperBlock.CompatibleFeatures()
- & EXT2_FEATURE_DIRECTORY_INDEX) != 0; }
- + uint8 DefaultHashVersion() const
- + { return fSuperBlock.default_hash_version; }
- + status_t AllocateInode(Transaction& transaction,
- + Inode* parent, int32 mode, ino_t& id);
- +
- + status_t AllocateBlocks(Transaction& transaction,
- + uint32 minimum, uint32 maximum,
- + uint32& blockGroup, uint32& start,
- + uint32& length);
- + status_t FreeBlocks(Transaction& transaction,
- + uint32 start, uint32 length);
- +
- + status_t LoadSuperBlock();
- + status_t WriteSuperBlock(Transaction& transaction);
- +
- // cache access
- void* BlockCache() { return fBlockCache; }
- + status_t FlushDevice();
- + status_t Sync();
- +
- static status_t Identify(int fd, ext2_super_block* superBlock);
- + // TransactionListener functions
- + void TransactionDone(bool success);
- + void RemovedFromTransaction();
- +
- private:
- static uint32 _UnsupportedIncompatibleFeatures(
- ext2_super_block& superBlock);
- @@ -76,12 +112,21 @@
- int fDevice;
- ext2_super_block fSuperBlock;
- char fName[32];
- +
- + BlockAllocator fBlockAllocator;
- + InodeAllocator fInodeAllocator;
- + Journal* fJournal;
- + Inode* fJournalInode;
- +
- uint32 fFlags;
- uint32 fBlockSize;
- uint32 fBlockShift;
- uint32 fFirstDataBlock;
- +
- uint32 fNumInodes;
- uint32 fNumGroups;
- + uint32 fFreeBlocks;
- + uint32 fFreeInodes;
- uint32 fGroupsPerBlock;
- ext2_block_group** fGroupBlocks;
- uint32 fInodesPerBlock;
- Index: src/add-ons/kernel/file_systems/ext2/DirectoryIterator.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/DirectoryIterator.cpp (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/DirectoryIterator.cpp (working copy)
- @@ -8,6 +8,9 @@
- #include <string.h>
- +#include <util/VectorSet.h>
- +
- +#include "CachedBlock.h"
- #include "HTree.h"
- #include "Inode.h"
- @@ -20,11 +23,36 @@
- #endif
- -DirectoryIterator::DirectoryIterator(Inode* inode)
- +struct HashedEntry
- +{
- + uint8* position;
- + uint32 hash;
- +
- + bool operator<(const HashedEntry& other) const
- + {
- + return hash <= other.hash;
- + }
- +
- + bool operator>(const HashedEntry& other) const
- + {
- + return hash >= other.hash;
- + }
- +};
- +
- +
- +DirectoryIterator::DirectoryIterator(Inode* directory, off_t start,
- + HTreeEntryIterator* parent)
- :
- - fInode(inode),
- - fOffset(0)
- + fDirectory(directory),
- + fVolume(directory->GetVolume()),
- + fBlockSize(fVolume->BlockSize()),
- + fParent(parent),
- + fLogicalBlock(start / fBlockSize),
- + fDisplacement(start % fBlockSize),
- + fPreviousDisplacement(fPreviousDisplacement)
- {
- + fIndexing = parent != NULL;
- + fInitStatus = fDirectory->FindBlock(start, fPhysicalBlock);
- }
- @@ -34,60 +62,597 @@
- status_t
- -DirectoryIterator::GetNext(char* name, size_t* _nameLength, ino_t* _id)
- +DirectoryIterator::InitCheck()
- {
- - if (fOffset + sizeof(ext2_dir_entry) >= fInode->Size()) {
- - TRACE("DirectoryIterator::GetNext() out of entries\n");
- + return fInitStatus;
- +}
- +
- +
- +status_t
- +DirectoryIterator::Get(char* name, size_t* _nameLength, ino_t* _id)
- +{
- + if (fLogicalBlock * fBlockSize + fDisplacement >= fDirectory->Size()) {
- + TRACE("DirectoryIterator::Get() out of entries\n");
- return B_ENTRY_NOT_FOUND;
- }
- - ext2_dir_entry entry;
- + CachedBlock cached(fVolume);
- + const uint8* block = cached.SetTo(fPhysicalBlock);
- + if (block == NULL)
- + return B_IO_ERROR;
- - while (true) {
- - size_t length = ext2_dir_entry::MinimumSize();
- - status_t status = fInode->ReadAt(fOffset, (uint8*)&entry, &length);
- + TRACE("DirectoryIterator::Get(): Displacement: %lu\n", fDisplacement);
- + const ext2_dir_entry* entry = (const ext2_dir_entry*)&block[fDisplacement];
- +
- + if (entry->NameLength() != 0) {
- + size_t length = entry->NameLength();
- +
- + TRACE("block %lu, displacement %lu: entry ino %lu, length %u, "
- + "name length %lu, type %lu\n", fLogicalBlock, fDisplacement,
- + entry->InodeID(), entry->Length(), (uint32)length,
- + (uint32)entry->FileType());
- +
- + if (*_nameLength > 0) {
- + if (*_nameLength < length)
- + length = *_nameLength - 1;
- +
- + memcpy(name, entry->name, length);
- + name[length] = '\0';
- +
- + *_nameLength = length;
- + }
- +
- + *_id = entry->InodeID();
- + } else
- + *_nameLength = 0;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +DirectoryIterator::Next()
- +{
- + TRACE("DirectoryIterator::Next()\n");
- +
- + if (fLogicalBlock * fBlockSize + fDisplacement >= fDirectory->Size()) {
- + TRACE("DirectoryIterator::Next() out of entries\n");
- + return B_ENTRY_NOT_FOUND;
- + }
- +
- + TRACE("DirectoryIterator::Next(): Creating cached block\n");
- +
- + CachedBlock cached(fVolume);
- + ext2_dir_entry* entry;
- +
- + const uint8* block = cached.SetTo(fPhysicalBlock);
- + if (block == NULL)
- + return B_IO_ERROR;
- +
- + entry = (ext2_dir_entry*)(block + fDisplacement);
- +
- + do {
- + TRACE("Checking entry at block %lu, displacement %lu\n", fPhysicalBlock,
- + fDisplacement);
- +
- + if (entry->Length() == 0) {
- + TRACE("empty entry.\n");
- + return B_ENTRY_NOT_FOUND;
- + }
- + if (!entry->IsValid()) {
- + TRACE("invalid entry.\n");
- + return B_BAD_DATA;
- + }
- +
- + fPreviousDisplacement = fDisplacement;
- + fDisplacement += entry->Length();
- +
- + if (fDisplacement == fBlockSize) {
- + TRACE("Reached end of block\n");
- +
- + fDisplacement = 0;
- +
- + status_t status = _NextBlock();
- + if (status != B_OK)
- + return status;
- +
- + if (fLogicalBlock * fBlockSize + ext2_dir_entry::MinimumSize()
- + < fDirectory->Size()) {
- + status_t status = fDirectory->FindBlock(
- + fLogicalBlock * fBlockSize, fPhysicalBlock);
- + if (status != B_OK)
- + return status;
- + } else {
- + TRACE("DirectoryIterator::Next() end of directory file\n");
- + return B_ENTRY_NOT_FOUND;
- + }
- +
- + if (entry->Length() == 0) {
- + block = cached.SetTo(fPhysicalBlock);
- + if (block == NULL)
- + return B_IO_ERROR;
- + }
- + } else if (fDisplacement > fBlockSize) {
- + TRACE("The entry isn't block aligned.\n");
- + // TODO: Is block alignment obligatory?
- + return B_BAD_DATA;
- + }
- +
- + entry = (ext2_dir_entry*)(block + fDisplacement);
- +
- + TRACE("DirectoryIterator::Next() skipping entry\n");
- + } while (entry->Length() == 0);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +DirectoryIterator::Rewind()
- +{
- + fDisplacement = 0;
- + fPreviousDisplacement = 0;
- + fLogicalBlock = 0;
- +
- + return fDirectory->FindBlock(0, fPhysicalBlock);
- +}
- +
- +
- +status_t
- +DirectoryIterator::AddEntry(Transaction& transaction, const char* name,
- + size_t _nameLength, ino_t id)
- +{
- + // TODO: Missing file type
- + off_t inodeSize = fDirectory->Size();
- + uint8 nameLength = _nameLength > EXT2_NAME_LENGTH ? EXT2_NAME_LENGTH
- + : _nameLength;
- +
- + uint32 lastBlock = (uint32)inodeSize / fBlockSize;
- + if (inodeSize % fBlockSize != 0)
- + lastBlock++;
- +
- + while (fLogicalBlock < lastBlock) {
- + uint16 pos = 0;
- + uint16 newLength;
- +
- + if (_AllocateBestEntryInBlock(nameLength, pos, newLength) == B_OK) {
- + return _AddEntry(transaction, name, nameLength, id, newLength,
- + pos);
- + }
- +
- + status_t status = _NextBlock();
- + if (status == B_ENTRY_NOT_FOUND)
- + return _SplitIndexedBlock(transaction, name, nameLength, id);
- + else if(status != B_OK)
- + return status;
- +
- + status = fDirectory->FindBlock(fLogicalBlock, fPhysicalBlock);
- if (status != B_OK)
- return status;
- - if (length < ext2_dir_entry::MinimumSize() || entry.Length() == 0)
- - return B_ENTRY_NOT_FOUND;
- - if (!entry.IsValid())
- + }
- +
- + bool firstSplit = lastBlock == 1 && fVolume->IndexedDirectories();
- + if (firstSplit) {
- + // Allocate another block
- + ++lastBlock;
- + }
- +
- + status_t status = fDirectory->Resize(transaction,
- + (lastBlock + 2) * fBlockSize);
- + if (status != B_OK)
- + return status;
- +
- + if (firstSplit)
- + return _SplitIndexedBlock(transaction, name, nameLength, id, true);
- +
- + fLogicalBlock = lastBlock + 1;
- + status = fDirectory->FindBlock(fLogicalBlock, fPhysicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + return _AddEntry(transaction, name, nameLength, id, fBlockSize, 0, false);
- +}
- +
- +
- +status_t
- +DirectoryIterator::FindEntry(const char* name, ino_t* _id)
- +{
- + TRACE("DirectoryIterator::FindEntry(): %p %p\n", this, name);
- + char buffer[EXT2_NAME_LENGTH + 1];
- + ino_t id;
- +
- + status_t status = B_OK;
- + while (status == B_OK) {
- + size_t nameLength = EXT2_NAME_LENGTH;
- + status = Get(buffer, &nameLength, &id);
- + if (status != B_OK)
- + return status;
- +
- + if (strcmp(name, buffer) == 0) {
- + if (_id != NULL)
- + *_id = id;
- + return B_OK;
- + }
- +
- + status = Next();
- + }
- +
- + return status;
- +}
- +
- +
- +status_t
- +DirectoryIterator::RemoveEntry(Transaction& transaction)
- +{
- + ext2_dir_entry* previousEntry;
- + ext2_dir_entry* dirEntry;
- + CachedBlock cached(fVolume);
- +
- + uint8* block = cached.SetToWritable(transaction, fPhysicalBlock);
- +
- + if (fDisplacement == 0) {
- + previousEntry = (ext2_dir_entry*)&block[fDisplacement];
- +
- + fPreviousDisplacement = fDisplacement;
- + fDisplacement += previousEntry->Length();
- +
- + if (fDisplacement == fBlockSize) {
- + memset(&previousEntry->name_length, 0, fBlockSize - 6);
- + fDisplacement = 0;
- + return Next();
- + } else if (fDisplacement > fBlockSize) {
- + TRACE("DirectoryIterator::RemoveEntry(): Entry isn't aligned to "
- + "block entry.");
- return B_BAD_DATA;
- + }
- - if (entry.NameLength() != 0)
- + dirEntry = (ext2_dir_entry*)&block[fDisplacement];
- + memcpy(&block[fPreviousDisplacement], &block[fDisplacement],
- + dirEntry->Length());
- +
- + previousEntry->SetLength(fDisplacement - fPreviousDisplacement
- + + previousEntry->Length());
- +
- + return B_OK;
- + }
- +
- + if (fPreviousDisplacement == fDisplacement) {
- + char buffer[EXT2_NAME_LENGTH + 1];
- +
- + dirEntry = (ext2_dir_entry*)&block[fDisplacement];
- +
- + memcpy(buffer, dirEntry->name, (uint32)dirEntry->name_length);
- +
- + fDisplacement = 0;
- + status_t status = FindEntry(dirEntry->name);
- + if (status == B_ENTRY_NOT_FOUND)
- + return B_BAD_DATA;
- + if (status != B_OK)
- + return status;
- + }
- +
- + previousEntry = (ext2_dir_entry*)&block[fPreviousDisplacement];
- + dirEntry = (ext2_dir_entry*)&block[fDisplacement];
- +
- + previousEntry->SetLength(previousEntry->Length() + dirEntry->Length());
- +
- + memset(&block[fDisplacement], 0,
- + fPreviousDisplacement + previousEntry->Length() - fDisplacement);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +DirectoryIterator::_AllocateBestEntryInBlock(uint8 nameLength, uint16& pos,
- + uint16& newLength)
- +{
- + CachedBlock cached(fVolume);
- + const uint8* block = cached.SetTo(fPhysicalBlock);
- +
- + uint16 requiredLength = nameLength + 8;
- + if (requiredLength % 4 != 0)
- + requiredLength += 4 - requiredLength % 4;
- +
- + uint16 bestPos = fBlockSize;
- + uint16 bestLength = fBlockSize;
- + ext2_dir_entry* dirEntry;
- +
- + while (pos < fBlockSize) {
- + dirEntry = (ext2_dir_entry*)&block[pos];
- +
- + uint16 realLength = dirEntry->NameLength() + 8;
- +
- + if (realLength % 4 != 0)
- + realLength += 4 - realLength % 4;
- +
- + uint16 emptySpace = dirEntry->Length() - realLength;
- + if (emptySpace == requiredLength) {
- + // Found an exact match
- + newLength = realLength;
- +
- + return B_OK;
- + } else if (emptySpace > requiredLength && emptySpace < bestLength) {
- + bestPos = pos;
- + bestLength = emptySpace;
- + newLength = realLength;
- + }
- +
- + pos += dirEntry->Length();
- + }
- +
- + if (bestPos != fBlockSize) {
- + pos = bestPos;
- + } else
- + return B_DEVICE_FULL;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +DirectoryIterator::_AddEntry(Transaction& transaction, const char* name,
- + uint8 nameLength, ino_t id, uint16 newLength, uint16 pos, bool hasPrevious)
- +{
- + CachedBlock cached(fVolume);
- +
- + uint8* block = cached.SetToWritable(transaction, fPhysicalBlock);
- + if (block == NULL)
- + return B_IO_ERROR;
- +
- + ext2_dir_entry* dirEntry = (ext2_dir_entry*)&block[pos];
- +
- + if (hasPrevious) {
- + uint16 previousLength = dirEntry->Length();
- + dirEntry->SetLength(newLength);
- +
- + dirEntry = (ext2_dir_entry*)&block[pos + newLength];
- + newLength = previousLength - newLength;
- + }
- +
- + dirEntry->SetLength(newLength);
- + dirEntry->name_length = nameLength;
- + dirEntry->SetInodeID(id);
- + memcpy(dirEntry->name, name, nameLength);
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +DirectoryIterator::_SplitIndexedBlock(Transaction& transaction,
- + const char* name, uint8 nameLength, ino_t id, bool firstSplit)
- +{
- + // Block is full, split required
- + // Allocate a buffer for the entries in the block
- + uint8* buffer = new(std::nothrow) uint8[fBlockSize];
- + if (buffer == NULL)
- + return B_NO_MEMORY;
- + ArrayDeleter<uint8> bufferDeleter(buffer);
- +
- + uint32 firstPhysicalBlock = 0;
- +
- + // Prepare block to hold the first half of the entries and fill the buffer
- + CachedBlock cachedFirst(fVolume);
- +
- + if (firstSplit) {
- + // Save all entries to the buffer
- + status_t status = fDirectory->FindBlock(0, firstPhysicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + const uint8* srcBlock = cachedFirst.SetTo(firstPhysicalBlock);
- + if (srcBlock == NULL)
- + return B_IO_ERROR;
- +
- + memcpy(buffer, srcBlock, fBlockSize);
- +
- + status = fDirectory->FindBlock(fBlockSize, fPhysicalBlock);
- + if (status != B_OK)
- + return status;
- + }
- +
- + uint8* firstBlock = cachedFirst.SetToWritable(transaction, fPhysicalBlock);
- + if (firstBlock == NULL)
- + return B_IO_ERROR;
- +
- + if (!firstSplit) {
- + // Save all entries to the buffer
- + memcpy(buffer, firstBlock, fBlockSize);
- + }
- +
- + // Prepare last block to hold the second half of the entries
- + fDisplacement = 0;
- +
- + status_t status = fDirectory->FindBlock(fDirectory->Size() - 1,
- + fPhysicalBlock);
- + if (status != B_OK)
- + return status;
- +
- + CachedBlock cachedSecond(fVolume);
- + uint8* secondBlock = cachedSecond.SetToWritable(transaction,
- + fPhysicalBlock);
- + if (secondBlock == NULL)
- + return B_IO_ERROR;
- +
- + // Sort entries
- + VectorSet<HashedEntry> entrySet;
- +
- + HTree htree(fVolume, fDirectory);
- + status = htree.PrepareForHash();
- + if (status != B_OK)
- + return B_OK;
- +
- + HashedEntry entry;
- +
- + uint32 displacement = 0;
- + ext2_dir_entry* dirEntry = NULL;
- +
- + while (displacement < fBlockSize) {
- + entry.position = &firstBlock[displacement];
- + dirEntry = (ext2_dir_entry*)entry.position;
- +
- + entry.hash = htree.Hash(dirEntry->name, dirEntry->name_length);
- +
- + status = entrySet.Insert(entry);
- + if (status != B_OK)
- + return status;
- +
- + displacement += dirEntry->Length();
- + }
- +
- + // Prepare the new entry to be included as well
- + ext2_dir_entry newEntry;
- +
- + uint16 newLength = (uint16)nameLength;
- + if (newLength % 4 != 0)
- + newLength += 4 - newLength % 4;
- +
- + newEntry.name_length = nameLength;
- + newEntry.SetLength(newLength);
- + newEntry.SetInodeID(id);
- + memcpy(newEntry.name, name, nameLength);
- +
- + entry.position = (uint8*)&newEntry;
- + entry.hash = htree.Hash(name, nameLength);
- +
- + entrySet.Insert(entry);
- +
- + // Move first half of entries to the first block
- + VectorSet<HashedEntry>::Iterator iterator = entrySet.Begin();
- + int32 median = entrySet.Count() / 2;
- + displacement = 0;
- +
- + for (int32 i = 0; i < median; ++i) {
- + dirEntry = (ext2_dir_entry*)(*iterator).position;
- +
- + memcpy(&firstBlock[displacement], dirEntry, dirEntry->Length());
- +
- + displacement += dirEntry->Length();
- + iterator++;
- + }
- +
- + // Save the hash to store in the parent
- + iterator--;
- + uint32 medianHash = (*iterator).hash;
- + iterator++;
- + bool collision = false;
- +
- + while ((*iterator).hash == medianHash) {
- + // Keep collisions on the same block
- + // This isn't the ideal solution, but it is a rare occurance
- + dirEntry = (ext2_dir_entry*)(*iterator).position;
- +
- + if (displacement + dirEntry->Length() > fBlockSize) {
- + // Doesn't fit on the block
- + --iterator;
- + dirEntry = (ext2_dir_entry*)(*iterator).position;
- + ++iterator;
- +
- + collision = true;
- break;
- + }
- - fOffset += entry.Length();
- - TRACE("DirectoryIterator::GetNext() skipping entry\n");
- + memcpy(&firstBlock[displacement], dirEntry, dirEntry->Length());
- +
- + displacement += dirEntry->Length();
- + iterator++;
- }
- - TRACE("offset %Ld: entry ino %lu, length %u, name length %u, type %u\n",
- - fOffset, entry.InodeID(), entry.Length(), entry.NameLength(),
- - entry.FileType());
- + // Update last entry in the block
- + uint16 oldLength = dirEntry->Length();
- + dirEntry = (ext2_dir_entry*)&firstBlock[displacement - oldLength];
- + dirEntry->SetLength(fBlockSize - displacement + oldLength);
- - // read name
- + // Move the second half of the entries to the second block
- + VectorSet<HashedEntry>::Iterator end = entrySet.End();
- + displacement = 0;
- - size_t length = entry.NameLength();
- - status_t status = fInode->ReadAt(fOffset + ext2_dir_entry::MinimumSize(),
- - (uint8*)entry.name, &length);
- - if (status == B_OK) {
- - if (*_nameLength < length)
- - length = *_nameLength - 1;
- - memcpy(name, entry.name, length);
- - name[length] = '\0';
- + while (iterator != end) {
- + dirEntry = (ext2_dir_entry*)(*iterator).position;
- - *_id = entry.InodeID();
- - *_nameLength = length;
- + memcpy(&secondBlock[displacement], dirEntry, dirEntry->Length());
- - fOffset += entry.Length();
- + displacement += dirEntry->Length();
- + iterator++;
- }
- - return status;
- + // Update last entry in the block
- + oldLength = dirEntry->Length();
- + dirEntry = (ext2_dir_entry*)&secondBlock[displacement - oldLength];
- + dirEntry->SetLength(fBlockSize - displacement + oldLength);
- +
- + // Update parent
- + if (firstSplit) {
- + // Prepare the root node
- + fDirectory->Node().SetFlag(EXT2_INODE_INDEXED);
- + HTreeRoot* root;
- +
- + firstBlock = cachedFirst.SetToWritable(transaction, firstPhysicalBlock);
- + if (firstBlock == NULL)
- + return B_IO_ERROR;
- +
- + status = fDirectory->WriteBack(transaction);
- + if (status != B_OK)
- + return status;
- +
- + root = (HTreeRoot*)firstBlock;
- +
- + root->hash_version = fVolume->DefaultHashVersion();
- + root->root_info_length = 4;
- + root->indirection_levels = 0;
- + root->flags = 0;
- +
- + root->count_limit->SetLimit((fBlockSize
- + - ((uint8*)root->count_limit - firstBlock)) / sizeof(HTreeEntry));
- + root->count_limit->SetCount(2);
- +
- + HTreeEntry* htreeEntry = (HTreeEntry*)root->count_limit;
- + htreeEntry->SetBlock(1);
- +
- + ++htreeEntry;
- + htreeEntry->SetBlock(2);
- + htreeEntry->SetHash(medianHash);
- +
- + off_t start = (off_t)root->root_info_length
- + + 2 * (sizeof(HTreeFakeDirEntry) + 4);
- + fParent = new(std::nothrow) HTreeEntryIterator(start, fDirectory);
- + if (fParent == NULL)
- + return B_NO_MEMORY;
- +
- + fParentDeleter.SetTo(fParent);
- +
- + fLogicalBlock = 1;
- + status = fDirectory->FindBlock(fLogicalBlock * fBlockSize,
- + fPhysicalBlock);
- +
- + fPreviousDisplacement = fDisplacement = 0;
- +
- + return fParent->Init();
- + }
- + else
- + return fParent->InsertEntry(medianHash, fLogicalBlock, collision);
- }
- status_t
- -DirectoryIterator::Rewind()
- +DirectoryIterator::_NextBlock()
- {
- - fOffset = 0;
- + TRACE("DirectoryIterator::_NextBlock()\n");
- + if (fIndexing) {
- + TRACE("DirectoryIterator::_NextBlock(): Indexing\n");
- + if (!fParent->HasCollision()) {
- + TRACE("IndexedDirectoryIterator::Next(): next block doesn't "
- + "contain collisions from previous block\n");
- +#ifndef COLLISION_TEST
- + return B_ENTRY_NOT_FOUND;
- +#endif
- + }
- +
- + return fParent->GetNext(fLogicalBlock);
- + }
- +
- + ++fLogicalBlock;
- +
- return B_OK;
- }
- Index: src/add-ons/kernel/file_systems/ext2/Journal.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Journal.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/Journal.h (revision 0)
- @@ -0,0 +1,258 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef JOURNAL_H
- +#define JOURNAL_H
- +
- +
- +#define JOURNAL_MAGIC 0xc03b3998U
- +
- +#define JOURNAL_DESCRIPTOR_BLOCK 1
- +#define JOURNAL_COMMIT_BLOCK 2
- +#define JOURNAL_SUPERBLOCK_V1 3
- +#define JOURNAL_SUPERBLOCK_V2 4
- +#define JOURNAL_REVOKE_BLOCK 5
- +
- +#define JOURNAL_FLAG_ESCAPED 1
- +#define JOURNAL_FLAG_SAME_UUID 2
- +#define JOURNAL_FLAG_DELETED 4
- +#define JOURNAL_FLAG_LAST_TAG 8
- +
- +#define JOURNAL_FEATURE_INCOMPATIBLE_REVOKE 1
- +
- +#define JOURNAL_KNOWN_READ_ONLY_COMPATIBLE_FEATURES 0
- +#define JOURNAL_KNOWN_INCOMPATIBLE_FEATURES \
- + JOURNAL_FEATURE_INCOMPATIBLE_REVOKE
- +
- +
- +#include "Volume.h"
- +
- +#include <AutoDeleter.h>
- +#include <util/DoublyLinkedList.h>
- +
- +#include "Transaction.h"
- +
- +
- +class RevokeManager;
- +
- +
- +struct JournalHeader {
- + uint32 magic;
- + uint32 block_type;
- + uint32 sequence;
- + char data[0];
- +
- + uint32 Magic() const
- + { return B_BENDIAN_TO_HOST_INT32(magic); }
- + uint32 BlockType() const
- + { return B_BENDIAN_TO_HOST_INT32(block_type); }
- + uint32 Sequence() const
- + { return B_BENDIAN_TO_HOST_INT32(sequence); }
- +
- + bool CheckMagic() const
- + { return Magic() == JOURNAL_MAGIC; }
- +
- + void IncrementSequence()
- + { sequence = B_HOST_TO_BENDIAN_INT32(Sequence() + 1); }
- + void DecrementSequence()
- + { sequence = B_HOST_TO_BENDIAN_INT32(Sequence() - 1); }
- + void MakeDescriptor(uint32 sequence);
- + void MakeCommit(uint32 sequence);
- +} _PACKED;
- +
- +
- +struct JournalBlockTag {
- + uint32 block_number;
- + uint32 flags;
- +
- + uint32 BlockNumber() const
- + { return B_BENDIAN_TO_HOST_INT32(block_number); }
- + uint32 Flags() const
- + { return B_BENDIAN_TO_HOST_INT32(flags); }
- +
- + void SetBlockNumber(uint32 block)
- + { block_number = B_HOST_TO_BENDIAN_INT32(block); }
- + void SetFlags(uint32 new_flags)
- + { flags = B_HOST_TO_BENDIAN_INT32(new_flags); }
- + void SetLastTagFlag()
- + { flags |= B_HOST_TO_BENDIAN_INT32(JOURNAL_FLAG_LAST_TAG); }
- + void SetEscapedFlag()
- + { flags |= B_HOST_TO_BENDIAN_INT32(JOURNAL_FLAG_ESCAPED); }
- +} _PACKED;
- +
- +
- +struct JournalRevokeHeader {
- + JournalHeader header;
- + uint32 num_bytes;
- +
- + uint32 revoke_blocks[0];
- +
- + uint32 NumBytes() const
- + { return B_BENDIAN_TO_HOST_INT32(num_bytes); }
- + uint32 RevokeBlock(int offset) const
- + { return B_BENDIAN_TO_HOST_INT32(revoke_blocks[offset]); }
- +} _PACKED;
- +
- +
- +struct JournalSuperBlock {
- + JournalHeader header;
- +
- + uint32 block_size;
- + uint32 num_blocks;
- + uint32 first_log_block;
- +
- + uint32 first_commit_id;
- + uint32 log_start;
- +
- + uint32 error;
- +
- + uint32 compatible_features;
- + uint32 incompatible_features;
- + uint32 read_only_compatible_features;
- +
- + uint8 uuid[16];
- +
- + uint32 num_users;
- + uint32 dynamic_superblock;
- +
- + uint32 max_transaction_blocks;
- + uint32 max_transaction_data;
- +
- + uint32 padding[44];
- +
- + uint8 user_ids[16*48];
- +
- + uint32 BlockSize() const
- + { return B_BENDIAN_TO_HOST_INT32(block_size); }
- + uint32 NumBlocks() const
- + { return B_BENDIAN_TO_HOST_INT32(num_blocks); }
- + uint32 FirstLogBlock() const
- + { return B_BENDIAN_TO_HOST_INT32(first_log_block); }
- + uint32 FirstCommitID() const
- + { return B_BENDIAN_TO_HOST_INT32(first_commit_id); }
- + uint32 LogStart() const
- + { return B_BENDIAN_TO_HOST_INT32(log_start); }
- + uint32 IncompatibleFeatures() const
- + { return B_BENDIAN_TO_HOST_INT32(incompatible_features); }
- + uint32 ReadOnlyCompatibleFeatures() const
- + { return B_BENDIAN_TO_HOST_INT32(read_only_compatible_features); }
- + uint32 MaxTransactionBlocks() const
- + { return B_BENDIAN_TO_HOST_INT32(max_transaction_blocks); }
- + uint32 MaxTransactionData() const
- + { return B_BENDIAN_TO_HOST_INT32(max_transaction_data); }
- +
- + void SetLogStart(uint32 logStart)
- + { log_start = B_HOST_TO_BENDIAN_INT32(logStart); }
- + void SetFirstCommitID(uint32 firstCommitID)
- + { first_commit_id = B_HOST_TO_BENDIAN_INT32(firstCommitID); }
- +} _PACKED;
- +
- +class LogEntry;
- +class Transaction;
- +typedef DoublyLinkedList<LogEntry> LogEntryList;
- +
- +
- +class Journal {
- +public:
- + Journal(Volume *fsVolume, Volume *jVolume);
- + virtual ~Journal();
- +
- + virtual status_t InitCheck();
- + virtual status_t Deinit();
- +
- + virtual status_t Recover();
- + virtual status_t StartLog();
- + status_t RestartLog();
- +
- + virtual status_t Lock(Transaction* owner,
- + bool separateSubTransactions);
- + virtual status_t Unlock(Transaction* owner, bool success);
- +
- + virtual status_t MapBlock(uint32 logical, uint32& physical);
- + inline uint32 FreeLogBlocks() const;
- +
- + status_t FlushLogAndBlocks();
- +
- + int32 TransactionID() const;
- +
- + Volume* GetFilesystemVolume()
- + { return fFilesystemVolume; }
- +protected:
- + Journal();
- +
- + status_t _WritePartialTransactionToLog(
- + JournalHeader* descriptorBlock,
- + bool detached, uint8** escapedBlock,
- + uint32& logBlock, off_t& blockNumber,
- + long& cookie,
- + ArrayDeleter<uint8>& escapedDataDeleter,
- + uint32& blockCount, bool& finished);
- + virtual status_t _WriteTransactionToLog();
- +
- + status_t _SaveSuperBlock();
- + status_t _LoadSuperBlock();
- +
- +
- + Volume* fJournalVolume;
- + void* fJournalBlockCache;
- + Volume* fFilesystemVolume;
- + void* fFilesystemBlockCache;
- +
- + recursive_lock fLock;
- + Transaction* fOwner;
- +
- + RevokeManager* fRevokeManager;
- +
- + status_t fInitStatus;
- + uint32 fBlockSize;
- + uint32 fFirstCommitID;
- + uint32 fFirstCacheCommitID;
- + uint32 fFirstLogBlock;
- + uint32 fLogSize;
- + uint32 fVersion;
- +
- + uint32 fLogStart;
- + uint32 fLogEnd;
- + uint32 fFreeBlocks;
- + uint32 fMaxTransactionSize;
- +
- + uint32 fCurrentCommitID;
- + //uint32 fNextCommitID;
- +
- + LogEntryList fLogEntries;
- + mutex fLogEntriesLock;
- + bool fHasSubTransaction;
- + bool fSeparateSubTransactions;
- + int32 fUnwrittenTransactions;
- + int32 fTransactionID;
- +
- +private:
- + status_t _CheckFeatures(JournalSuperBlock* superblock);
- +
- + uint32 _CountTags(JournalHeader *descriptorBlock);
- + status_t _RecoverPassScan(uint32& lastCommitID);
- + status_t _RecoverPassRevoke(uint32 lastCommitID);
- + status_t _RecoverPassReplay(uint32 lastCommitID);
- +
- + status_t _FlushLog(bool canWait, bool flushBlocks);
- +
- + inline uint32 _WrapAroundLog(uint32 block);
- +
- + size_t _CurrentTransactionSize() const;
- + size_t _FullTransactionSize() const;
- + size_t _MainTransactionSize() const;
- +
- + virtual status_t _TransactionDone(bool success);
- +
- + static void _TransactionWritten(int32 transactionID,
- + int32 event, void* _logEntry);
- + static void _TransactionIdle(int32 transactionID,
- + int32 event, void* _journal);
- +};
- +
- +#endif // JOURNAL_H
- +
- Property changes on: src/add-ons/kernel/file_systems/ext2/Journal.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/IndexedDirectoryIterator.h (working copy)
- @@ -1,36 +0,0 @@
- -/*
- - * Copyright 2010, Haiku Inc. All rights reserved.
- - * This file may be used under the terms of the MIT License.
- - *
- - * Authors:
- - * Janito V. Ferreira Filho
- - */
- -#ifndef INDEXED_DIRECTORY_ITERATOR_H
- -#define INDEXED_DIRECTORY_ITERATOR_H
- -
- -
- -#include "DirectoryIterator.h"
- -
- -
- -class HTreeEntryIterator;
- -
- -class IndexedDirectoryIterator : public DirectoryIterator {
- -public:
- - IndexedDirectoryIterator(off_t start,
- - uint32 blockSize, Inode* directory,
- - HTreeEntryIterator* parent);
- - virtual ~IndexedDirectoryIterator();
- -
- - status_t GetNext(char* name, size_t* nameLength,
- - ino_t* id);
- -
- - status_t Rewind();
- -private:
- - bool fIndexing;
- - HTreeEntryIterator* fParent;
- - off_t fMaxOffset;
- - uint32 fBlockSize;
- - uint32 fMaxAttempts;
- -};
- -
- -#endif // INDEXED_DIRECTORY_ITERATOR_H
- Index: src/add-ons/kernel/file_systems/ext2/Transaction.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/Transaction.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/Transaction.cpp (revision 0)
- @@ -0,0 +1,217 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "Transaction.h"
- +
- +#include <string.h>
- +
- +#include <fs_cache.h>
- +
- +#include "Journal.h"
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +TransactionListener::TransactionListener()
- +{
- +}
- +
- +
- +TransactionListener::~TransactionListener()
- +{
- +}
- +
- +
- +Transaction::Transaction()
- + :
- + fJournal(NULL),
- + fParent(NULL)
- +{
- +}
- +
- +
- +Transaction::Transaction(Journal* journal)
- + :
- + fJournal(NULL),
- + fParent(NULL)
- +{
- + Start(journal);
- +}
- +
- +
- +Transaction::~Transaction()
- +{
- + if (IsStarted())
- + fJournal->Unlock(this, false);
- +}
- +
- +status_t
- +Transaction::Start(Journal* journal)
- +{
- + if (IsStarted())
- + return B_OK;
- +
- + fJournal = journal;
- + if (fJournal == NULL)
- + return B_ERROR;
- +
- + status_t status = fJournal->Lock(this, false);
- + if (status != B_OK)
- + fJournal = NULL;
- +
- + return status;
- +}
- +
- +
- +status_t
- +Transaction::Done(bool success)
- +{
- + if (!IsStarted())
- + return B_OK;
- +
- + status_t status = fJournal->Unlock(this, success);
- +
- + if (status == B_OK)
- + fJournal = NULL;
- +
- + return status;
- +}
- +
- +
- +int32
- +Transaction::ID() const
- +{
- + if (!IsStarted())
- + return -1;
- +
- + return fJournal->TransactionID();
- +}
- +
- +
- +bool
- +Transaction::IsStarted() const
- +{
- + return fJournal != NULL;
- +}
- +
- +
- +bool
- +Transaction::HasParent() const
- +{
- + return fParent != NULL;
- +}
- +
- +
- +status_t
- +Transaction::WriteBlocks(off_t blockNumber, const uint8* buffer,
- + size_t numBlocks)
- +{
- + if (!IsStarted())
- + return B_NO_INIT;
- +
- + void* cache = GetVolume()->BlockCache();
- + size_t blockSize = GetVolume()->BlockSize();
- +
- + for (size_t i = 0; i < numBlocks; ++i) {
- + void* block = block_cache_get_empty(cache, blockNumber + i, ID());
- + if (block == NULL)
- + return B_ERROR;
- +
- + memcpy(block, buffer, blockSize);
- + buffer += blockSize;
- +
- + block_cache_put(cache, blockNumber + i);
- + }
- +
- + return B_OK;
- +}
- +
- +
- +void
- +Transaction::Split()
- +{
- + cache_start_sub_transaction(fJournal->GetFilesystemVolume()->BlockCache(),
- + ID());
- +}
- +
- +
- +Volume*
- +Transaction::GetVolume() const
- +{
- + if (!IsStarted())
- + return NULL;
- +
- + return fJournal->GetFilesystemVolume();
- +}
- +
- +
- +void
- +Transaction::AddListener(TransactionListener* listener)
- +{
- + if (!IsStarted())
- + panic("Transaction is not running!");
- +
- + fListeners.Add(listener);
- +}
- +
- +
- +void
- +Transaction::RemoveListener(TransactionListener* listener)
- +{
- + if (!IsStarted())
- + panic("Transaction is not running!");
- +
- + fListeners.Remove(listener);
- + listener->RemovedFromTransaction();
- +}
- +
- +
- +void
- +Transaction::NotifyListeners(bool success)
- +{
- + if (success) {
- + TRACE("Transaction::NotifyListeners(true): Number of listeners: %ld\n",
- + fListeners.Count());
- + } else {
- + TRACE("Transaction::NotifyListeners(false): Number of listeners: %ld\n",
- + fListeners.Count());
- + }
- +
- + while (TransactionListener* listener = fListeners.RemoveHead()) {
- + listener->TransactionDone(success);
- + listener->RemovedFromTransaction();
- + }
- +}
- +
- +
- +void
- +Transaction::MoveListenersTo(Transaction* transaction)
- +{
- + while (TransactionListener* listener = fListeners.RemoveHead())
- + transaction->fListeners.Add(listener);
- +}
- +
- +
- +void
- +Transaction::SetParent(Transaction* transaction)
- +{
- + fParent = transaction;
- +}
- +
- +
- +Transaction*
- +Transaction::Parent() const
- +{
- + return fParent;
- +}
- Index: src/add-ons/kernel/file_systems/ext2/ext2.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/ext2.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/ext2.h (working copy)
- @@ -13,6 +13,8 @@
- #include <KernelExport.h>
- +#define TRACE_EXT2
- +
- #define EXT2_SUPER_BLOCK_OFFSET 1024
- struct ext2_super_block {
- @@ -108,9 +110,16 @@
- { return B_LENDIAN_TO_HOST_INT32(read_only_features); }
- uint32 IncompatibleFeatures() const
- { return B_LENDIAN_TO_HOST_INT32(incompatible_features); }
- + ino_t JournalInode() const
- + { return B_LENDIAN_TO_HOST_INT32(journal_inode); }
- uint32 HashSeed(uint8 i) const
- { return B_LENDIAN_TO_HOST_INT32(hash_seed[i]); }
- + void SetFreeInodes(uint32 freeInodes)
- + { free_inodes = B_HOST_TO_LENDIAN_INT32(freeInodes); }
- + void SetFreeBlocks(uint32 freeBlocks)
- + { free_blocks = B_HOST_TO_LENDIAN_INT32(freeBlocks); }
- +
- bool IsValid();
- // implemented in Volume.cpp
- } _PACKED;
- @@ -162,8 +171,16 @@
- uint16 _padding;
- uint32 _reserved[3];
- + uint32 BlockBitmap() const
- + { return B_LENDIAN_TO_HOST_INT32(block_bitmap); }
- + uint32 InodeBitmap() const
- + { return B_LENDIAN_TO_HOST_INT32(inode_bitmap); }
- uint32 InodeTable() const
- { return B_LENDIAN_TO_HOST_INT32(inode_table); }
- + uint16 FreeBlocks() const
- + { return B_LENDIAN_TO_HOST_INT16(free_blocks); }
- + uint16 FreeInodes() const
- + { return B_LENDIAN_TO_HOST_INT16(free_inodes); }
- } _PACKED;
- #define EXT2_DIRECT_BLOCKS 12
- @@ -175,6 +192,24 @@
- uint32 indirect;
- uint32 double_indirect;
- uint32 triple_indirect;
- +
- + uint32 Direct(int index) const
- + { return B_LENDIAN_TO_HOST_INT32(direct[index]); }
- + uint32 Indirect() const
- + { return B_LENDIAN_TO_HOST_INT32(indirect); }
- + uint32 DoubleIndirect() const
- + { return B_LENDIAN_TO_HOST_INT32(double_indirect); }
- + uint32 TripleIndirect() const
- + { return B_LENDIAN_TO_HOST_INT32(triple_indirect); }
- +
- + void SetDirect(int index, uint32 value)
- + { direct[index] = B_HOST_TO_LENDIAN_INT32(value); }
- + void SetIndirect(uint32 value)
- + { indirect = B_HOST_TO_LENDIAN_INT32(value); }
- + void SetDoubleIndirect(uint32 value)
- + { double_indirect = B_HOST_TO_LENDIAN_INT32(value); }
- + void SetTripleIndirect(uint32 value)
- + { triple_indirect = B_HOST_TO_LENDIAN_INT32(value); }
- } _PACKED;
- struct ext2_inode {
- @@ -214,6 +249,7 @@
- uint16 Mode() const { return B_LENDIAN_TO_HOST_INT16(mode); }
- uint32 Flags() const { return B_LENDIAN_TO_HOST_INT32(flags); }
- uint16 NumLinks() const { return B_LENDIAN_TO_HOST_INT16(num_links); }
- + uint32 NumBlocks() const { return B_LENDIAN_TO_HOST_INT32(num_blocks); }
- time_t AccessTime() const { return B_LENDIAN_TO_HOST_INT32(access_time); }
- time_t CreationTime() const { return B_LENDIAN_TO_HOST_INT32(creation_time); }
- @@ -241,6 +277,60 @@
- return B_LENDIAN_TO_HOST_INT16(gid)
- | (B_LENDIAN_TO_HOST_INT16(gid_high) << 16);
- }
- +
- + void SetMode(uint16 newMode)
- + {
- + mode = B_LENDIAN_TO_HOST_INT16(newMode);
- + }
- +
- + void SetFlag(uint32 mask)
- + {
- + flags |= B_HOST_TO_LENDIAN_INT32(mask);
- + }
- +
- + void SetFlags(uint32 newFlags)
- + {
- + flags = B_HOST_TO_LENDIAN_INT32(newFlags);
- + }
- +
- + void SetNumLinks(uint16 numLinks)
- + {
- + num_links = B_HOST_TO_LENDIAN_INT16(numLinks);
- + }
- +
- + void SetNumBlocks(uint32 numBlocks)
- + {
- + num_blocks = B_HOST_TO_LENDIAN_INT32(numBlocks);
- + }
- +
- + void SetCreationTime(time_t creationTime)
- + {
- + creation_time = B_HOST_TO_LENDIAN_INT32(creationTime);
- + }
- +
- + void SetModificationTime(time_t modificationTime)
- + {
- + modification_time = B_HOST_TO_LENDIAN_INT32(modificationTime);
- + }
- +
- + void SetSize(off_t newSize)
- + {
- + size = B_HOST_TO_LENDIAN_INT32(newSize & 0xFFFFFFFF);
- + if (S_ISREG(Mode()))
- + size_high = B_HOST_TO_LENDIAN_INT32(newSize >> 32);
- + }
- +
- + void SetUserID(uint32 newUID)
- + {
- + uid = B_HOST_TO_LENDIAN_INT16(newUID & 0xFFFF);
- + uid_high = B_HOST_TO_LENDIAN_INT16(newUID >> 16);
- + }
- +
- + void SetGroupID(uint32 newGID)
- + {
- + gid = B_HOST_TO_LENDIAN_INT16(newGID & 0xFFFF);
- + gid_high = B_HOST_TO_LENDIAN_INT16(newGID >> 16);
- + }
- } _PACKED;
- #define EXT2_SUPER_BLOCK_MAGIC 0xef53
- @@ -270,11 +360,26 @@
- uint8 file_type;
- char name[EXT2_NAME_LENGTH];
- - uint32 InodeID() const { return B_LENDIAN_TO_HOST_INT32(inode_id); }
- - uint16 Length() const { return B_LENDIAN_TO_HOST_INT16(length); }
- - uint8 NameLength() const { return name_length; }
- - uint8 FileType() const { return file_type; }
- + uint32 InodeID() const { return B_LENDIAN_TO_HOST_INT32(inode_id); }
- + uint16 Length() const { return B_LENDIAN_TO_HOST_INT16(length); }
- + uint8 NameLength() const { return name_length; }
- + uint8 FileType() const { return file_type; }
- + void SetInodeID(uint32 id) { inode_id = B_HOST_TO_LENDIAN_INT32(id); }
- +
- + void SetLength(uint8 nameLength)
- + {
- + name_length = nameLength;
- +
- + if (nameLength % 4 == 0) {
- + length = B_HOST_TO_LENDIAN_INT16(
- + (short)(nameLength + MinimumSize()));
- + } else {
- + length = B_HOST_TO_LENDIAN_INT16(
- + (short)(nameLength % 4 + 1 + MinimumSize()));
- + }
- + }
- +
- bool IsValid() const
- {
- return Length() > MinimumSize();
- @@ -370,6 +475,16 @@
- } _PACKED;
- +struct file_cookie {
- + bigtime_t last_notification;
- + off_t last_size;
- + int open_mode;
- +};
- +
- +
- +#define INODE_NOTIFICATION_INTERVAL 10000000LL
- +
- +
- extern fs_volume_ops gExt2VolumeOps;
- extern fs_vnode_ops gExt2VnodeOps;
- Index: src/add-ons/kernel/file_systems/ext2/CachedBlock.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/CachedBlock.h (revision 37957)
- +++ src/add-ons/kernel/file_systems/ext2/CachedBlock.h (working copy)
- @@ -9,32 +9,40 @@
- #include <fs_cache.h>
- +#include "Transaction.h"
- #include "Volume.h"
- class CachedBlock {
- public:
- - CachedBlock(Volume* volume);
- - CachedBlock(Volume* volume, uint32 block);
- - ~CachedBlock();
- + CachedBlock(Volume* volume);
- + CachedBlock(Volume* volume, uint32 block);
- + ~CachedBlock();
- - void Keep();
- - void Unset();
- + void Keep();
- + void Unset();
- - const uint8* SetTo(uint32 block);
- + const uint8* SetTo(uint32 block);
- + uint8* SetToWritable(Transaction& transaction,
- + uint32 block, bool empty = false);
- + uint8* SetToWritableWithoutTransaction(uint32 block,
- + bool empty = false);
- - const uint8* Block() const { return fBlock; }
- - off_t BlockNumber() const { return fBlockNumber; }
- + const uint8* Block() const { return fBlock; }
- + off_t BlockNumber() const { return fBlockNumber; }
- private:
- - CachedBlock(const CachedBlock &);
- - CachedBlock &operator=(const CachedBlock &);
- - // no implementation
- + CachedBlock(const CachedBlock &);
- + CachedBlock &operator=(const CachedBlock &);
- + // no implementation
- +
- + uint8* _SetToWritableEtc(int32 transaction, uint32 block,
- + bool empty);
- protected:
- - Volume* fVolume;
- - uint32 fBlockNumber;
- - uint8* fBlock;
- + Volume* fVolume;
- + uint32 fBlockNumber;
- + uint8* fBlock;
- };
- @@ -94,4 +102,35 @@
- return fBlock = (uint8 *)block_cache_get(fVolume->BlockCache(), block);
- }
- +
- +inline uint8*
- +CachedBlock::SetToWritable(Transaction& transaction, uint32 block, bool empty)
- +{
- + return _SetToWritableEtc(transaction.ID(), block, empty);
- +}
- +
- +
- +inline uint8*
- +CachedBlock::SetToWritableWithoutTransaction(uint32 block, bool empty)
- +{
- + return _SetToWritableEtc((int32)-1, block, empty);
- +}
- +
- +inline uint8*
- +CachedBlock::_SetToWritableEtc(int32 transaction, uint32 block, bool empty)
- +{
- + Unset();
- + fBlockNumber = block;
- +
- + if (empty) {
- + fBlock = (uint8*)block_cache_get_empty(fVolume->BlockCache(),
- + block, transaction);
- + } else {
- + fBlock = (uint8*)block_cache_get_writable(fVolume->BlockCache(),
- + block, transaction);
- + }
- +
- + return fBlock;
- +}
- +
- #endif // CACHED_BLOCK_H
- Index: src/add-ons/kernel/file_systems/ext2/HashRevokeManager.cpp
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/HashRevokeManager.cpp (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/HashRevokeManager.cpp (revision 0)
- @@ -0,0 +1,158 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +
- +#include "HashRevokeManager.h"
- +
- +#include <new>
- +
- +
- +//#define TRACE_EXT2
- +#ifdef TRACE_EXT2
- +# define TRACE(x...) dprintf("\33[34mext2:\33[0m " x)
- +#else
- +# define TRACE(x...) ;
- +#endif
- +
- +
- +HashRevokeManager::HashRevokeManager()
- + :
- + fHash(NULL),
- + kInitialHashSize(128)
- + // TODO: Benchmark and find an optimal value
- +{
- +}
- +
- +
- +HashRevokeManager::~HashRevokeManager()
- +{
- + if (fHash != NULL)
- + hash_uninit(fHash);
- +}
- +
- +
- +status_t
- +HashRevokeManager::Init()
- +{
- + RevokeElement dummyElement;
- +
- + fHash = hash_init(kInitialHashSize, offset_of_member(dummyElement, next),
- + &HashRevokeManager::Compare,
- + &HashRevokeManager::Hash);
- +
- + if (fHash == NULL)
- + return B_NO_MEMORY;
- +
- + return B_OK;
- +}
- +
- +
- +status_t
- +HashRevokeManager::Insert(uint32 block, uint32 commitID)
- +{
- + RevokeElement* element = (RevokeElement*)hash_lookup(fHash, &block);
- +
- + if (element != NULL) {
- + TRACE("HashRevokeManager::Insert(): Already has an element\n");
- + if (element->commitID < commitID) {
- + TRACE("HashRevokeManager::Insert(): Deleting previous element\n");
- + status_t retValue = hash_remove(fHash, element);
- +
- + if (retValue != B_OK)
- + return retValue;
- +
- + delete element;
- + }
- + else {
- + return B_OK;
- + // We already have a newer version of the block
- + }
- + }
- +
- + return _ForceInsert(block, commitID);
- +}
- +
- +
- +status_t
- +HashRevokeManager::Remove(uint32 block)
- +{
- + RevokeElement* element = (RevokeElement*)hash_lookup(fHash, &block);
- +
- + if (element == NULL)
- + return B_ERROR; // TODO: Perhaps we should just ignore?
- +
- + status_t retValue = hash_remove(fHash, element);
- +
- + if (retValue == B_OK)
- + delete element;
- +
- + return retValue;
- +}
- +
- +
- +bool
- +HashRevokeManager::Lookup(uint32 block, uint32 commitID)
- +{
- + RevokeElement* element = (RevokeElement*)hash_lookup(fHash, &block);
- +
- + if (element == NULL)
- + return false;
- +
- + return element->commitID >= commitID;
- +}
- +
- +
- +/*static*/ int
- +HashRevokeManager::Compare(void* _revoked, const void *_block)
- +{
- + RevokeElement* revoked = (RevokeElement*)_revoked;
- + uint32 block = *(uint32*)_block;
- +
- + if (revoked->block == block)
- + return 0;
- +
- + return (revoked->block > block) ? 1 : -1;
- +}
- +
- +
- +/*static*/ uint32
- +HashRevokeManager::Hash(void* _revoked, const void* _block, uint32 range)
- +{
- + TRACE("HashRevokeManager::Hash(): revoked: %p, block: %p, range: %lu\n",
- + _revoked, _block, range);
- + RevokeElement* revoked = (RevokeElement*)_revoked;
- +
- + if (revoked != NULL)
- + return revoked->block % range;
- +
- + uint32 block = *(uint32*)_block;
- + return block % range;
- +}
- +
- +
- +status_t
- +HashRevokeManager::_ForceInsert(uint32 block, uint32 commitID)
- +{
- + RevokeElement* element = new(std::nothrow) RevokeElement;
- +
- + if (element == NULL)
- + return B_NO_MEMORY;
- +
- + element->block = block;
- + element->commitID = commitID;
- +
- + status_t retValue = hash_insert_grow(fHash, element);
- +
- + if (retValue == B_OK) {
- + fRevokeCount++;
- + TRACE("HashRevokeManager::_ForceInsert(): revoke count: %lu\n",
- + fRevokeCount);
- + }
- +
- + return retValue;
- +}
- +
- Property changes on: src/add-ons/kernel/file_systems/ext2/HashRevokeManager.cpp
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/RevokeManager.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/RevokeManager.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/RevokeManager.h (revision 0)
- @@ -0,0 +1,35 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef REVOKEMANAGER_H
- +#define REVOKEMANAGER_H
- +
- +#include "Journal.h"
- +
- +
- +struct JournalRevokeHeader;
- +
- +class RevokeManager {
- +public:
- + RevokeManager();
- + virtual ~RevokeManager() = 0;
- +
- + virtual status_t Insert(uint32 block, uint32 commitID) = 0;
- + virtual status_t Remove(uint32 block) = 0;
- + virtual bool Lookup(uint32 block, uint32 commitID) = 0;
- +
- + uint32 NumRevokes() { return fRevokeCount; }
- +
- + status_t ScanRevokeBlock(JournalRevokeHeader* revokeBlock,
- + uint32 commitID);
- +
- +protected:
- + uint32 fRevokeCount;
- +};
- +
- +#endif // REVOKEMANAGER_H
- +
- Property changes on: src/add-ons/kernel/file_systems/ext2/RevokeManager.h
- ___________________________________________________________________
- Added: svn:executable
- + *
- Index: src/add-ons/kernel/file_systems/ext2/BitmapBlock.h
- ===================================================================
- --- src/add-ons/kernel/file_systems/ext2/BitmapBlock.h (revision 0)
- +++ src/add-ons/kernel/file_systems/ext2/BitmapBlock.h (revision 0)
- @@ -0,0 +1,48 @@
- +/*
- + * Copyright 2001-2010, Haiku Inc. All rights reserved.
- + * This file may be used under the terms of the MIT License.
- + *
- + * Authors:
- + * Janito V. Ferreira Filho
- + */
- +#ifndef BITMAPBLOCK_H
- +#define BITMAPBLOCK_H
- +
- +#include "CachedBlock.h"
- +
- +
- +class BitmapBlock : public CachedBlock {
- +public:
- + BitmapBlock(Volume* volume, uint32 numBits);
- + ~BitmapBlock();
- +
- + bool SetTo(uint32 block);
- + bool SetToWritable(Transaction& transaction,
- + uint32 block, bool empty = false);
- +
- + bool CheckMarked(uint32 start, uint32 length);
- + bool CheckUnmarked(uint32 start, uint32 length);
- +
- + bool Mark(uint32 start, uint32 length,
- + bool force = false);
- + bool Unmark(uint32 start, uint32 length,
- + bool force = false);
- +
- + void FindNextMarked(uint32& pos);
- + void FindNextUnmarked(uint32& pos);
- +
- + void FindPreviousMarked(uint32& pos);
- +
- + void FindLargestUnmarkedRange(uint32& start,
- + uint32& length);
- +
- + uint32 NumBits() const;
- +
- +protected:
- + uint32* fData;
- + const uint32* fReadOnlyData;
- +
- + uint32 fNumBits;
- +};
- +
- +#endif // BITMAPBLOCK_H
- Property changes on: src/add-ons/kernel/file_systems/ext2/BitmapBlock.h
- ___________________________________________________________________
- Added: svn:executable
- + *
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