// SPDX-License-Identifier: GPL-2.0-only #include <linux/ns_common.h>#include <linux/proc_ns.h>#include <linux/vfsdebug.h> #ifdef CONFIG_DEBUG_VFSstatic void ns_debug(struct ns_common *ns, const struct proc_ns_operations *ops){	switch (ns->ns_type) {#ifdef CONFIG_CGROUPS	case CLONE_NEWCGROUP:		VFS_WARN_ON_ONCE(ops != &cgroupns_operations);		break;#endif#ifdef CONFIG_IPC_NS	case CLONE_NEWIPC:		VFS_WARN_ON_ONCE(ops != &ipcns_operations);		break;#endif	case CLONE_NEWNS:		VFS_WARN_ON_ONCE(ops != &mntns_operations);		break;#ifdef CONFIG_NET_NS	case CLONE_NEWNET:		VFS_WARN_ON_ONCE(ops != &netns_operations);		break;#endif#ifdef CONFIG_PID_NS	case CLONE_NEWPID:		VFS_WARN_ON_ONCE(ops != &pidns_operations);		break;#endif#ifdef CONFIG_TIME_NS	case CLONE_NEWTIME:		VFS_WARN_ON_ONCE(ops != &timens_operations);		break;#endif#ifdef CONFIG_USER_NS	case CLONE_NEWUSER:		VFS_WARN_ON_ONCE(ops != &userns_operations);		break;#endif#ifdef CONFIG_UTS_NS	case CLONE_NEWUTS:		VFS_WARN_ON_ONCE(ops != &utsns_operations);		break;#endif	}}#endif int __ns_common_init(struct ns_common *ns, u32 ns_type, const struct proc_ns_operations *ops, int inum){	refcount_set(&ns->__ns_ref, 1);	ns->stashed = NULL;	ns->ops = ops;	ns->ns_id = 0;	ns->ns_type = ns_type;	RB_CLEAR_NODE(&ns->ns_tree_node);	INIT_LIST_HEAD(&ns->ns_list_node); #ifdef CONFIG_DEBUG_VFS	ns_debug(ns, ops);#endif 	if (inum) {		ns->inum = inum;		return 0;	}	return proc_alloc_inum(&ns->inum);} void __ns_common_free(struct ns_common *ns){	proc_free_inum(ns->inum);}