tun: fix LSM/SELinux labeling of tun/tap devices

[~andy/linux] / include / linux / security.h

diff --git a/include/linux/security.h b/include/linux/security.h
index 05e88bdcf7d95cbe493bfa8ed890010bd0094890..eee7478cda701ddeabc00150f607f368a4239350 100644 (file)
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -694,6 +694,12 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     userspace to load a kernel module with the given name.
  *     @kmod_name name of the module requested by the kernel
  *     Return 0 if successful.
+ * @kernel_module_from_file:
+ *     Load a kernel module from userspace.
+ *     @file contains the file structure pointing to the file containing
+ *     the kernel module to load. If the module is being loaded from a blob,
+ *     this argument will be NULL.
+ *     Return 0 if permission is granted.
  * @task_fix_setuid:
  *     Update the module's state after setting one or more of the user
  *     identity attributes of the current process.  The @flags parameter
@@ -983,17 +989,29 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     tells the LSM to decrement the number of secmark labeling rules loaded
  * @req_classify_flow:
  *     Sets the flow's sid to the openreq sid.
+ * @tun_dev_alloc_security:
+ *     This hook allows a module to allocate a security structure for a TUN
+ *     device.
+ *     @security pointer to a security structure pointer.
+ *     Returns a zero on success, negative values on failure.
+ * @tun_dev_free_security:
+ *     This hook allows a module to free the security structure for a TUN
+ *     device.
+ *     @security pointer to the TUN device's security structure
  * @tun_dev_create:
  *     Check permissions prior to creating a new TUN device.
- * @tun_dev_post_create:
- *     This hook allows a module to update or allocate a per-socket security
- *     structure.
- *     @sk contains the newly created sock structure.
+ * @tun_dev_attach_queue:
+ *     Check permissions prior to attaching to a TUN device queue.
+ *     @security pointer to the TUN device's security structure.
  * @tun_dev_attach:
- *     Check permissions prior to attaching to a persistent TUN device.  This
- *     hook can also be used by the module to update any security state
+ *     This hook can be used by the module to update any security state
  *     associated with the TUN device's sock structure.
  *     @sk contains the existing sock structure.
+ *     @security pointer to the TUN device's security structure.
+ * @tun_dev_open:
+ *     This hook can be used by the module to update any security state
+ *     associated with the TUN device's security structure.
+ *     @security pointer to the TUN devices's security structure.
  *
  * Security hooks for XFRM operations.
  *
@@ -1508,6 +1526,7 @@ struct security_operations {
        int (*kernel_act_as)(struct cred *new, u32 secid);
        int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
        int (*kernel_module_request)(char *kmod_name);
+       int (*kernel_module_from_file)(struct file *file);
        int (*task_fix_setuid) (struct cred *new, const struct cred *old,
                                int flags);
        int (*task_setpgid) (struct task_struct *p, pid_t pgid);
@@ -1613,9 +1632,12 @@ struct security_operations {
        void (*secmark_refcount_inc) (void);
        void (*secmark_refcount_dec) (void);
        void (*req_classify_flow) (const struct request_sock *req, struct flowi *fl);
-       int (*tun_dev_create)(void);
-       void (*tun_dev_post_create)(struct sock *sk);
-       int (*tun_dev_attach)(struct sock *sk);
+       int (*tun_dev_alloc_security) (void **security);
+       void (*tun_dev_free_security) (void *security);
+       int (*tun_dev_create) (void);
+       int (*tun_dev_attach_queue) (void *security);
+       int (*tun_dev_attach) (struct sock *sk, void *security);
+       int (*tun_dev_open) (void *security);
 #endif /* CONFIG_SECURITY_NETWORK */
 
 #ifdef CONFIG_SECURITY_NETWORK_XFRM
@@ -1765,6 +1787,7 @@ void security_transfer_creds(struct cred *new, const struct cred *old);
 int security_kernel_act_as(struct cred *new, u32 secid);
 int security_kernel_create_files_as(struct cred *new, struct inode *inode);
 int security_kernel_module_request(char *kmod_name);
+int security_kernel_module_from_file(struct file *file);
 int security_task_fix_setuid(struct cred *new, const struct cred *old,
                             int flags);
 int security_task_setpgid(struct task_struct *p, pid_t pgid);
@@ -2278,6 +2301,11 @@ static inline int security_kernel_module_request(char *kmod_name)
        return 0;
 }
 
+static inline int security_kernel_module_from_file(struct file *file)
+{
+       return 0;
+}
+
 static inline int security_task_fix_setuid(struct cred *new,
                                           const struct cred *old,
                                           int flags)
@@ -2553,9 +2581,12 @@ void security_inet_conn_established(struct sock *sk,
 int security_secmark_relabel_packet(u32 secid);
 void security_secmark_refcount_inc(void);
 void security_secmark_refcount_dec(void);
+int security_tun_dev_alloc_security(void **security);
+void security_tun_dev_free_security(void *security);
 int security_tun_dev_create(void);
-void security_tun_dev_post_create(struct sock *sk);
-int security_tun_dev_attach(struct sock *sk);
+int security_tun_dev_attach_queue(void *security);
+int security_tun_dev_attach(struct sock *sk, void *security);
+int security_tun_dev_open(void *security);
 
 #else  /* CONFIG_SECURITY_NETWORK */
 static inline int security_unix_stream_connect(struct sock *sock,
@@ -2720,16 +2751,31 @@ static inline void security_secmark_refcount_dec(void)
 {
 }
 
+static inline int security_tun_dev_alloc_security(void **security)
+{
+       return 0;
+}
+
+static inline void security_tun_dev_free_security(void *security)
+{
+}
+
 static inline int security_tun_dev_create(void)
 {
        return 0;
 }
 
-static inline void security_tun_dev_post_create(struct sock *sk)
+static inline int security_tun_dev_attach_queue(void *security)
 {
+       return 0;
+}
+
+static inline int security_tun_dev_attach(struct sock *sk, void *security)
+{
+       return 0;
 }
 
-static inline int security_tun_dev_attach(struct sock *sk)
+static inline int security_tun_dev_open(void *security)
 {
        return 0;
 }