capabilities: implement per-process securebits

[mirror_ubuntu-artful-kernel.git] / include / linux / security.h

diff --git a/include/linux/security.h b/include/linux/security.h
index 53a34539382aee1f94e34a677d20838a4aba9d6f..e6299e50e210dc7f99dc56afe4812bb49d09bd8f 100644 (file)
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -34,8 +34,6 @@
 #include <linux/xfrm.h>
 #include <net/flow.h>
 
-extern unsigned securebits;
-
 /* Maximum number of letters for an LSM name string */
 #define SECURITY_NAME_MAX      10
 
@@ -61,6 +59,8 @@ extern int cap_inode_need_killpriv(struct dentry *dentry);
 extern int cap_inode_killpriv(struct dentry *dentry);
 extern int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid, int flags);
 extern void cap_task_reparent_to_init (struct task_struct *p);
+extern int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
+                         unsigned long arg4, unsigned long arg5, long *rc_p);
 extern int cap_task_setscheduler (struct task_struct *p, int policy, struct sched_param *lp);
 extern int cap_task_setioprio (struct task_struct *p, int ioprio);
 extern int cap_task_setnice (struct task_struct *p, int nice);
@@ -720,7 +720,9 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     @arg3 contains a argument.
  *     @arg4 contains a argument.
  *     @arg5 contains a argument.
- *     Return 0 if permission is granted.
+ *      @rc_p contains a pointer to communicate back the forced return code
+ *     Return 0 if permission is granted, and non-zero if the security module
+ *      has taken responsibility (setting *rc_p) for the prctl call.
  * @task_reparent_to_init:
  *     Set the security attributes in @p->security for a kernel thread that
  *     is being reparented to the init task.
@@ -1420,7 +1422,7 @@ struct security_operations {
        int (*task_wait) (struct task_struct * p);
        int (*task_prctl) (int option, unsigned long arg2,
                           unsigned long arg3, unsigned long arg4,
-                          unsigned long arg5);
+                          unsigned long arg5, long *rc_p);
        void (*task_reparent_to_init) (struct task_struct * p);
        void (*task_to_inode)(struct task_struct *p, struct inode *inode);
 
@@ -1684,7 +1686,7 @@ int security_task_kill(struct task_struct *p, struct siginfo *info,
                        int sig, u32 secid);
 int security_task_wait(struct task_struct *p);
 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-                        unsigned long arg4, unsigned long arg5);
+                        unsigned long arg4, unsigned long arg5, long *rc_p);
 void security_task_reparent_to_init(struct task_struct *p);
 void security_task_to_inode(struct task_struct *p, struct inode *inode);
 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
@@ -2271,9 +2273,9 @@ static inline int security_task_wait (struct task_struct *p)
 static inline int security_task_prctl (int option, unsigned long arg2,
                                       unsigned long arg3,
                                       unsigned long arg4,
-                                      unsigned long arg5)
+                                      unsigned long arg5, long *rc_p)
 {
-       return 0;
+       return cap_task_prctl(option, arg2, arg3, arg3, arg5, rc_p);
 }
 
 static inline void security_task_reparent_to_init (struct task_struct *p)