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* CachedNode::SetToWritable() already needs the updated header, so we need to 

Unset() the header in Allocate() before calling it. This fixes bug #5410.
* CachedNode::Allocate() does not need to revert its changes; the transaction
  will take care of that. However, BPlusTree::fHeader is currently not correctly
  maintained if a transaction fails (working on that now).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35490 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2010-02-16 08:34:55 +00:00
parent 751e92fde1
commit 2a8ae7fb92
1 changed files with 11 additions and 12 deletions
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23
src/add-ons/kernel/file_systems/bfs/BPlusTree.cpp
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@ -227,7 +227,7 @@ CachedNode::InternalSetTo(Transaction* transaction, off_t offset)
fWritable = false;
}
if (block) {
if (block != NULL) {
// The node is somewhere in that block...
// (confusing offset calculation)
fNode = (bplustree_node*)(block + offset
@ -324,18 +324,17 @@ CachedNode::Allocate(Transaction& transaction, bplustree_node** _node,
header->maximum_size = HOST_ENDIAN_TO_BFS_INT64(header->MaximumSize()
+ fTree->fNodeSize);
if (SetToWritable(transaction, offset, false) != NULL) {
fNode->Initialize();
cached.Unset();
// SetToWritable() below needs the new values in the tree's header
*_offset = offset;
*_node = fNode;
return B_OK;
}
if (SetToWritable(transaction, offset, false) == NULL)
RETURN_ERROR(B_ERROR);
// revert header size to old value
header->maximum_size = HOST_ENDIAN_TO_BFS_INT64(header->MaximumSize()
- fTree->fNodeSize);
RETURN_ERROR(B_ERROR);
fNode->Initialize();
*_offset = offset;
*_node = fNode;
return B_OK;
}
@ -423,7 +422,7 @@ BPlusTree::SetTo(Transaction& transaction, Inode* stream, int32 nodeSize)
= HOST_ENDIAN_TO_BFS_INT64((uint64)BPLUSTREE_NULL);
header->maximum_size = HOST_ENDIAN_TO_BFS_INT64(nodeSize * 2);
memcpy(&fHeader, header, sizeof(bplustree_header));
cached.Unset();
// initialize b+tree root node
cached.SetToWritable(transaction, fHeader.RootNode(), false);