diff options
Diffstat (limited to 'kernel/user_namespace.c')
| -rw-r--r-- | kernel/user_namespace.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index aa312b0dc3ec..1491ad00388f 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -86,11 +86,12 @@ int create_user_ns(struct cred *new) if (!ns) return -ENOMEM; - ret = proc_alloc_inum(&ns->proc_inum); + ret = ns_alloc_inum(&ns->ns); if (ret) { kmem_cache_free(user_ns_cachep, ns); return ret; } + ns->ns.ops = &userns_operations; atomic_set(&ns->count, 1); /* Leave the new->user_ns reference with the new user namespace. */ @@ -136,7 +137,7 @@ void free_user_ns(struct user_namespace *ns) #ifdef CONFIG_PERSISTENT_KEYRINGS key_put(ns->persistent_keyring_register); #endif - proc_free_inum(ns->proc_inum); + ns_free_inum(&ns->ns); kmem_cache_free(user_ns_cachep, ns); ns = parent; } while (atomic_dec_and_test(&parent->count)); @@ -841,7 +842,12 @@ static bool new_idmap_permitted(const struct file *file, return false; } -static void *userns_get(struct task_struct *task) +static inline struct user_namespace *to_user_ns(struct ns_common *ns) +{ + return container_of(ns, struct user_namespace, ns); +} + +static struct ns_common *userns_get(struct task_struct *task) { struct user_namespace *user_ns; @@ -849,17 +855,17 @@ static void *userns_get(struct task_struct *task) user_ns = get_user_ns(__task_cred(task)->user_ns); rcu_read_unlock(); - return user_ns; + return user_ns ? &user_ns->ns : NULL; } -static void userns_put(void *ns) +static void userns_put(struct ns_common *ns) { - put_user_ns(ns); + put_user_ns(to_user_ns(ns)); } -static int userns_install(struct nsproxy *nsproxy, void *ns) +static int userns_install(struct nsproxy *nsproxy, struct ns_common *ns) { - struct user_namespace *user_ns = ns; + struct user_namespace *user_ns = to_user_ns(ns); struct cred *cred; /* Don't allow gaining capabilities by reentering @@ -888,19 +894,12 @@ static int userns_install(struct nsproxy *nsproxy, void *ns) return commit_creds(cred); } -static unsigned int userns_inum(void *ns) -{ - struct user_namespace *user_ns = ns; - return user_ns->proc_inum; -} - const struct proc_ns_operations userns_operations = { .name = "user", .type = CLONE_NEWUSER, .get = userns_get, .put = userns_put, .install = userns_install, - .inum = userns_inum, }; static __init int user_namespaces_init(void) |