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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
Notes: sideshowbarker 2024-07-18 03:20:18 +09:00
18 changed files with 128 additions and 0 deletions
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8
Kernel/FileSystem/VirtualFileSystem.cpp
View file

@ -652,6 +652,14 @@ ErrorOr<void> VirtualFileSystem::rename(Credentials const& credentials, StringVi
TRY(new_parent_inode.add_child(old_inode, new_basename, old_inode.mode()));
TRY(old_parent_inode.remove_child(old_basename));
// If the inode that we moved is a directory and we changed parent
// directories, then we also have to make .. point to the new parent inode,
// because .. is its own inode.
if (old_inode.is_directory() && old_parent_inode.index() != new_parent_inode.index()) {
TRY(old_inode.replace_child(".."sv, new_parent_inode));
}
return {};
}