kernel/fs/vfs.cpp

132 	safe if a reference to vnode is held (note that for the root mount
253 /*!	\brief Guards io_context::root.
255 	Must be held when setting or getting the io_context::root field.
257 	setting the field is inc_vnode_ref_count() on io_context::root.
259 static mutex sIOContextRootLock = MUTEX_INITIALIZER("io_context::root lock");
1929 		replace_vnode_if_disconnected(mount, vnodeToDisconnect, context->root,
1957 /*!	\brief Gets the root node of the current IO context.
1970 		struct vnode* root = context->root;
1971 		if (root != NULL)
1972 			inc_vnode_ref_count(root);
1976 		if (root != NULL)
1977 			return root;
1981 			"have a root\n", team_get_current_team_id());
2031 				// This path points to the root of the file system
2171 		// Also prevent breaking the root of the IO context.
2173 			if (vnode.Get() == ioContext->root) {
2242 			// Check if we start from the root directory or the current
2244 			// Cut off all leading slashes if it's the root directory
2255 				vnode.SetTo(ioContext->root);
2326 	// figure out if we need to start at root or at cwd
2590 		// If the node is the context's root, bail out. Otherwise resolve mount
2592 		if (vnode == ioContext->root)
2608 			// context's root. Now we've hit the global root.
2648 	// the root dir will result in an empty path: fix it
2924 				// root
2955 	// Make sure the IO context root is not bypassed.
2956 	if (parent == ioContext->root) {
3210 		B_PRINTF_POINTER_WIDTH, "address", B_PRINTF_POINTER_WIDTH, "root",
3373 	kprintf(" root vnode:\t%p\n", context->root);
3629 	if (context->root)
3630 		put_vnode(context->root);
3988 		// user is root
3989 		// root has always read/write permission, but at least one of the
4493 		in which case the node is created without an entry in the root FS -- it
4535 		// No path. Create the node in the root FS.
4853 		// insert a directory separator if this is not the file system root
4971 		context->root = parentContext->root;
4972 		if (context->root)
4973 			inc_vnode_ref_count(context->root);
5005 		context->root = sRoot;
5008 		if (context->root)
5009 			inc_vnode_ref_count(context->root);
7586 	// the root node is supposed to be owned by the file system - it must
7591 		panic("fs_mount: file system does not own its root node!\n");
7597 	// set up the links between the root vnode and the vnode it covers
7617 		get_current_io_context(true)->root = sRoot;
7677 		panic("fs_unmount: find_mount() failed on root vnode @%p of mount\n",
7979 		info->root = mount->root_vnode->id;
8941 	// only root can do this
10013 	// only root is allowed to chroot()
10038 	// set the new root
10041 	struct vnode* oldRoot = context->root;
10042 	context->root = vnode.Detach();