From 03e68060636e05989ea94bcb671ab633948f328c Mon Sep 17 00:00:00 2001 From: James Morris Date: Fri, 23 Jun 2006 02:03:58 -0700 Subject: [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 Acked-by: Stephen Smalley Cc: Jan Engelhardt Cc: Chris Wright Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- security/dummy.c | 6 ++++++ security/selinux/hooks.c | 6 ++++++ 2 files changed, 12 insertions(+) (limited to 'security') diff --git a/security/dummy.c b/security/dummy.c index c98d553..879a985 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 093efba..9dcf298 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, -- cgit v1.1