// SPDX-License-Identifier: GPL-2.0-only #include #include #include #ifdef CONFIG_DEBUG_VFS static 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); }