xnu-3247.1.106.tar.gz

[apple/xnu.git] / bsd / kern / sys_work_interval.c

diff --git a/bsd/kern/sys_work_interval.c b/bsd/kern/sys_work_interval.c
new file mode 100644 (file)
index 0000000..45b36c7
--- /dev/null
+++ b/bsd/kern/sys_work_interval.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/kernel_types.h>
+#include <sys/sysproto.h>
+#include <sys/priv.h>
+#include <sys/work_interval.h>
+#include <kern/sched_prim.h>
+#include <kern/thread.h>
+#include <libkern/libkern.h>
+
+int
+work_interval_ctl(__unused proc_t p, struct work_interval_ctl_args *uap, __unused int32_t *retval)
+{
+       uint32_t        operation = uap->operation;
+       int                     error = 0;
+       kern_return_t   kret = KERN_SUCCESS;
+       uint64_t        work_interval_id;
+       struct work_interval_notification       notification;
+
+       switch (operation) {
+               case WORK_INTERVAL_OPERATION_CREATE:
+                       if (uap->arg == USER_ADDR_NULL || uap->work_interval_id != 0) {
+                               return EINVAL;
+                       }
+                       if (uap->len < sizeof(work_interval_id)) {
+                               return ERANGE;
+                       }
+
+                       /*
+                        * Privilege check performed up-front, and then the work
+                        * ID is allocated for use by the thread
+                        */
+                       error = priv_check_cred(kauth_cred_get(), PRIV_WORK_INTERVAL, 0);
+                       if (error) {
+                               return (error);
+                       }
+
+                       kret = thread_policy_create_work_interval(current_thread(),
+                                                                                                         &work_interval_id);
+                       if (kret == KERN_SUCCESS) {
+                               error = copyout(&work_interval_id, uap->arg, sizeof(work_interval_id));
+                       } else {
+                               error = EINVAL;
+                       }
+
+                       break;
+               case WORK_INTERVAL_OPERATION_DESTROY:
+                       if (uap->arg != USER_ADDR_NULL || uap->work_interval_id == 0) {
+                               return EINVAL;
+                       }
+
+                       /*
+                        * No privilege check, we assume a previous WORK_INTERVAL_OPERATION_CREATE
+                        * operation would have allocated a work interval ID for the current
+                        * thread, which the scheduler will validate.
+                        */
+                       kret = thread_policy_destroy_work_interval(current_thread(),
+                                                                                                          uap->work_interval_id);
+                       if (kret != KERN_SUCCESS) {
+                               error = EINVAL;
+                       }
+
+                       break;
+               case WORK_INTERVAL_OPERATION_NOTIFY:
+                       if (uap->arg == USER_ADDR_NULL || uap->work_interval_id == 0) {
+                               return EINVAL;
+                       }
+                       if (uap->len < sizeof(notification)) {
+                               return EINVAL;
+                       }
+
+                       /*
+                        * No privilege check, we assume a previous WORK_INTERVAL_OPERATION_CREATE
+                        * operation would have allocated a work interval ID for the current
+                        * thread, which the scheduler will validate.
+                        */
+                       error = copyin(uap->arg, &notification, sizeof(notification));
+                       if (error) {
+                               break;
+                       }
+
+                       kret = sched_work_interval_notify(current_thread(),
+                                                                                         uap->work_interval_id,
+                                                                                         notification.start,
+                                                                                         notification.finish,
+                                                                                         notification.deadline,
+                                                                                         notification.next_start,
+                                                                                         notification.flags);
+                       if (kret != KERN_SUCCESS) {
+                               error = EINVAL;
+                               break;
+                       }
+
+                       break;
+               default:
+                       error = ENOTSUP;
+                       break;
+       }
+
+       return (error);
+}