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Kernel: Update the ".." inode for directories after a rename

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Because the ".." entry in a directory is a separate inode, if a
directory is renamed to a new location, then we should update this entry
the point to the new parent directory as well.

Co-authored-by: Liav A <liavalb@gmail.com>
This commit is contained in:
sin-ack 2022-10-08 11:22:12 +02:00 • committed by Andreas Kling
parent 2b246d980a
commit 3b03077abb
18 changed files with 128 additions and 0 deletions
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20
Kernel/FileSystem/TmpFS/Inode.cpp
View file

@ -60,6 +60,26 @@ ErrorOr<void> TmpFSInode::traverse_as_directory(Function<ErrorOr<void>(FileSyste
return {};
}
ErrorOr<void> TmpFSInode::replace_child(StringView name, Inode& new_child)
{
MutexLocker locker(m_inode_lock);
VERIFY(is_directory());
VERIFY(new_child.fsid() == fsid());
auto* child = find_child_by_name(name);
if (!child)
return ENOENT;
auto old_child = child->inode;
child->inode = static_cast<TmpFSInode&>(new_child);
old_child->did_delete_self();
// TODO: Emit a did_replace_child event.
return {};
}
ErrorOr<NonnullOwnPtr<TmpFSInode::DataBlock>> TmpFSInode::DataBlock::create()
{
auto data_block_buffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_size(DataBlock::block_size, AllocationStrategy::AllocateNow));