#define USERNS_INIT_FLAGS USERNS_SETGROUPS_ALLOWED
+struct ucounts;
+
+enum ucount_type {
+ UCOUNT_USER_NAMESPACES,
+ UCOUNT_PID_NAMESPACES,
+ UCOUNT_UTS_NAMESPACES,
+ UCOUNT_IPC_NAMESPACES,
+ UCOUNT_NET_NAMESPACES,
+ UCOUNT_MNT_NAMESPACES,
+ UCOUNT_CGROUP_NAMESPACES,
+ UCOUNT_COUNTS,
+};
+
struct user_namespace {
struct uid_gid_map uid_map;
struct uid_gid_map gid_map;
struct key *persistent_keyring_register;
struct rw_semaphore persistent_keyring_register_sem;
#endif
+ struct work_struct work;
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_set set;
+ struct ctl_table_header *sysctls;
+#endif
+ struct ucounts *ucounts;
+ int ucount_max[UCOUNT_COUNTS];
+};
+
+struct ucounts {
+ struct hlist_node node;
+ struct user_namespace *ns;
+ kuid_t uid;
+ atomic_t count;
+ atomic_t ucount[UCOUNT_COUNTS];
};
extern struct user_namespace init_user_ns;
+bool setup_userns_sysctls(struct user_namespace *ns);
+void retire_userns_sysctls(struct user_namespace *ns);
+struct ucounts *inc_ucount(struct user_namespace *ns, kuid_t uid, enum ucount_type type);
+void dec_ucount(struct ucounts *ucounts, enum ucount_type type);
+
#ifdef CONFIG_USER_NS
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
extern int create_user_ns(struct cred *new);
extern int unshare_userns(unsigned long unshare_flags, struct cred **new_cred);
-extern void free_user_ns(struct user_namespace *ns);
+extern void __put_user_ns(struct user_namespace *ns);
static inline void put_user_ns(struct user_namespace *ns)
{
if (ns && atomic_dec_and_test(&ns->count))
- free_user_ns(ns);
+ __put_user_ns(ns);
}
struct seq_operations;
extern int proc_setgroups_show(struct seq_file *m, void *v);
extern bool userns_may_setgroups(const struct user_namespace *ns);
extern bool current_in_userns(const struct user_namespace *target_ns);
+
+struct ns_common *ns_get_owner(struct ns_common *ns);
#else
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
{
return true;
}
+
+static inline struct ns_common *ns_get_owner(struct ns_common *ns)
+{
+ return ERR_PTR(-EPERM);
+}
#endif
#endif /* _LINUX_USER_H */