diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ns/ns_common_types.h | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/include/linux/ns/ns_common_types.h b/include/linux/ns/ns_common_types.h index 0014fbc1c626..ea45c54e4435 100644 --- a/include/linux/ns/ns_common_types.h +++ b/include/linux/ns/ns_common_types.h @@ -7,6 +7,7 @@ #include <linux/rbtree.h> #include <linux/refcount.h> #include <linux/types.h> +#include <uapi/linux/sched.h> struct cgroup_namespace; struct dentry; @@ -184,15 +185,38 @@ struct ns_common { struct user_namespace *: (IS_ENABLED(CONFIG_USER_NS) ? &userns_operations : NULL), \ struct uts_namespace *: (IS_ENABLED(CONFIG_UTS_NS) ? &utsns_operations : NULL)) -#define ns_common_type(__ns) \ - _Generic((__ns), \ - struct cgroup_namespace *: CLONE_NEWCGROUP, \ - struct ipc_namespace *: CLONE_NEWIPC, \ - struct mnt_namespace *: CLONE_NEWNS, \ - struct net *: CLONE_NEWNET, \ - struct pid_namespace *: CLONE_NEWPID, \ - struct time_namespace *: CLONE_NEWTIME, \ - struct user_namespace *: CLONE_NEWUSER, \ - struct uts_namespace *: CLONE_NEWUTS) +/* + * FOR_EACH_NS_TYPE - Canonical list of namespace types + * + * Enumerates all (struct type, CLONE_NEW* flag) pairs. This is the + * single source of truth used to derive ns_common_type() and + * CLONE_NS_ALL. When adding a new namespace type, add a single entry + * here; all consumers update automatically. + * + * @X: Callback macro taking (struct_name, clone_flag) as arguments. + */ +#define FOR_EACH_NS_TYPE(X) \ + X(cgroup_namespace, CLONE_NEWCGROUP) \ + X(ipc_namespace, CLONE_NEWIPC) \ + X(mnt_namespace, CLONE_NEWNS) \ + X(net, CLONE_NEWNET) \ + X(pid_namespace, CLONE_NEWPID) \ + X(time_namespace, CLONE_NEWTIME) \ + X(user_namespace, CLONE_NEWUSER) \ + X(uts_namespace, CLONE_NEWUTS) + +/* Bitmask of all known CLONE_NEW* flags. */ +#define _NS_TYPE_FLAG_OR(struct_name, flag) | (flag) +#define CLONE_NS_ALL (0 FOR_EACH_NS_TYPE(_NS_TYPE_FLAG_OR)) + +/* + * ns_common_type - Map a namespace struct pointer to its CLONE_NEW* flag + * + * Uses a leading-comma pattern so the FOR_EACH_NS_TYPE expansion + * produces ", struct foo *: FLAG" entries without a trailing comma. + */ +#define _NS_TYPE_ASSOC(struct_name, flag) , struct struct_name *: (flag) + +#define ns_common_type(__ns) _Generic((__ns)FOR_EACH_NS_TYPE(_NS_TYPE_ASSOC)) #endif /* _LINUX_NS_COMMON_TYPES_H */ |