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[PATCH] SELinux: Add security hook definition for getioprio and insert hooks

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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>
This commit is contained in:
David Quigley 2006-06-30 01:55:49 -07:00 • committed by Linus Torvalds
parent 7a01955f99
commit a1836a42da
4 changed files with 51 additions and 5 deletions
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15
include/linux/security.h
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@ -585,6 +585,10 @@ struct swap_info_struct;
* @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 @@ struct security_operations {
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 @@ static inline int security_task_setioprio (struct task_struct *p, int ioprio)
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 @@ static inline int security_task_setioprio (struct task_struct *p, int ioprio)
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)
{