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authorJames Morris <jmorris@namei.org>2006-06-23 02:03:58 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:42:53 -0700
commit03e68060636e05989ea94bcb671ab633948f328c (patch)
treeaee5e7b55f31998536dd3a4f54f38caeee6105d6 /security
parent9216dfad4fc97ab639ef0885efc713f3d7a20d5b (diff)
downloadlinux-stericsson-03e68060636e05989ea94bcb671ab633948f328c.tar.gz
[PATCH] lsm: add task_setioprio hook
Implement an LSM hook for setting a task's IO priority, similar to the hook for setting a tasks's nice value. A previous version of this LSM hook was included in an older version of multiadm by Jan Engelhardt, although I don't recall it being submitted upstream. Also included is the corresponding SELinux hook, which re-uses the setsched permission in the proccess class. Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security')
-rw-r--r--security/dummy.c6
-rw-r--r--security/selinux/hooks.c6
2 files changed, 12 insertions, 0 deletions
diff --git a/security/dummy.c b/security/dummy.c
index c98d553984ec..879a98523b1b 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -516,6 +516,11 @@ static int dummy_task_setnice (struct task_struct *p, int nice)
return 0;
}
+static int dummy_task_setioprio (struct task_struct *p, int ioprio)
+{
+ return 0;
+}
+
static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
{
return 0;
@@ -972,6 +977,7 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, task_getsid);
set_to_dummy_if_null(ops, task_setgroups);
set_to_dummy_if_null(ops, task_setnice);
+ set_to_dummy_if_null(ops, task_setioprio);
set_to_dummy_if_null(ops, task_setrlimit);
set_to_dummy_if_null(ops, task_setscheduler);
set_to_dummy_if_null(ops, task_getscheduler);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 093efba4d9b6..9dcf298921d4 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2645,6 +2645,11 @@ static int selinux_task_setnice(struct task_struct *p, int nice)
return task_has_perm(current,p, PROCESS__SETSCHED);
}
+static int selinux_task_setioprio(struct task_struct *p, int ioprio)
+{
+ return task_has_perm(current, p, PROCESS__SETSCHED);
+}
+
static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
{
struct rlimit *old_rlim = current->signal->rlim + resource;
@@ -4383,6 +4388,7 @@ static struct security_operations selinux_ops = {
.task_getsid = selinux_task_getsid,
.task_setgroups = selinux_task_setgroups,
.task_setnice = selinux_task_setnice,
+ .task_setioprio = selinux_task_setioprio,
.task_setrlimit = selinux_task_setrlimit,
.task_setscheduler = selinux_task_setscheduler,
.task_getscheduler = selinux_task_getscheduler,