// 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);
}
