// GetNode status_t Tree::GetNode(uint64 blockNumber, Node **node) { status_t error = (node ? InitCheck() : B_BAD_VALUE); if (error == B_OK) { Block *block; error = fBlockCache->GetBlock(blockNumber, &block); if (error == B_OK) { if (block->GetKind() == Block::KIND_UNKNOWN) block->SetKind(Block::KIND_FORMATTED); if (block->GetKind() == Block::KIND_FORMATTED) { *node = block->ToNode(); // check the node if (!(*node)->IsChecked()) { if ((*node)->IsInternal()) error = (*node)->ToInternalNode()->Check(); else if ((*node)->IsLeaf()) error = (*node)->ToLeafNode()->Check(); else error = B_BAD_DATA; if (error == B_OK) (*node)->SetChecked(true); } } else { block->Put(); error = B_BAD_DATA; } } } return error; }
// Mount status_t Volume::Mount(fs_volume *fsVolume, const char *path) { Unmount(); status_t error = (path ? B_OK : B_BAD_VALUE); fFSVolume = fsVolume; // load the settings if (error == B_OK) { fSettings = new(nothrow) Settings; if (fSettings) error = fSettings->SetTo(path); else error = B_NO_MEMORY; } // copy the device name if (error == B_OK) { fDeviceName = new(nothrow) char[strlen(path) + 1]; if (fDeviceName) strcpy(fDeviceName, path); else error = B_NO_MEMORY; } // open disk if (error == B_OK) { fDevice = open(path, O_RDONLY); if (fDevice < 0) SET_ERROR(error, errno); } // read and analyze super block if (error == B_OK) error = _ReadSuperBlock(); if (error == B_OK) UpdateName(fsVolume->partition); // create and init block cache if (error == B_OK) { fBlockCache = new(nothrow) BlockCache; if (fBlockCache) error = fBlockCache->Init(fDevice, CountBlocks(), GetBlockSize()); else error = B_NO_MEMORY; } // create the tree if (error == B_OK) { fTree = new(nothrow) Tree; if (!fTree) error = B_NO_MEMORY; } // get the root node and init the tree if (error == B_OK) { Block *rootBlock = NULL; error = fBlockCache->GetBlock(fSuperBlock->GetRootBlock(), &rootBlock); REPORT_ERROR(error); if (error == B_OK) { rootBlock->SetKind(Block::KIND_FORMATTED); error = fTree->Init(this, rootBlock->ToNode(), fSuperBlock->GetTreeHeight()); REPORT_ERROR(error); rootBlock->Put(); } } // get the root VNode (i.e. the root dir) if (error == B_OK) { fRootVNode = new(nothrow) VNode; if (fRootVNode) { error = FindVNode(REISERFS_ROOT_PARENT_OBJECTID, REISERFS_ROOT_OBJECTID, fRootVNode); REPORT_ERROR(error); if (error == B_OK) { error = publish_vnode(fFSVolume, fRootVNode->GetID(), fRootVNode, &gReiserFSVnodeOps, S_IFDIR, 0); } REPORT_ERROR(error); } else error = B_NO_MEMORY; } // init the hash function if (error == B_OK) _InitHashFunction(); // init the negative entry list if (error == B_OK) _InitNegativeEntries(); // cleanup on error if (error != B_OK) Unmount(); RETURN_ERROR(error); }