[PATCH] SELinux: Add security hook definition for getioprio and insert hooks
Add a new security hook definition for the sys_ioprio_get operation. At
present, the SELinux hook function implementation for this hook is
identical to the getscheduler implementation but a separate hook is
introduced to allow this check to be specialized in the future if
necessary.
This patch also creates a helper function get_task_ioprio which handles the
access check in addition to retrieving the ioprio value for the task.
Signed-off-by: David Quigley <dpquigl@tycho.nsa.gov>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/security.h b/include/linux/security.h
index d4b13d6..f753038 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -585,6 +585,10 @@
* @p contains the task_struct of process.
* @ioprio contains the new ioprio value
* Return 0 if permission is granted.
+ * @task_getioprio
+ * Check permission before getting the ioprio value of @p.
+ * @p contains the task_struct of process.
+ * Return 0 if permission is granted.
* @task_setrlimit:
* Check permission before setting the resource limits of the current
* process for @resource to @new_rlim. The old resource limit values can
@@ -1227,6 +1231,7 @@
int (*task_setgroups) (struct group_info *group_info);
int (*task_setnice) (struct task_struct * p, int nice);
int (*task_setioprio) (struct task_struct * p, int ioprio);
+ int (*task_getioprio) (struct task_struct * p);
int (*task_setrlimit) (unsigned int resource, struct rlimit * new_rlim);
int (*task_setscheduler) (struct task_struct * p, int policy,
struct sched_param * lp);
@@ -1864,6 +1869,11 @@
return security_ops->task_setioprio (p, ioprio);
}
+static inline int security_task_getioprio (struct task_struct *p)
+{
+ return security_ops->task_getioprio (p);
+}
+
static inline int security_task_setrlimit (unsigned int resource,
struct rlimit *new_rlim)
{
@@ -2520,6 +2530,11 @@
return 0;
}
+static inline int security_task_getioprio (struct task_struct *p)
+{
+ return 0;
+}
+
static inline int security_task_setrlimit (unsigned int resource,
struct rlimit *new_rlim)
{