X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/c18c124eaa464aaaa5549e99e5a70fc9cbb50944..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/bsd/kern/sys_work_interval.c?ds=inline

diff --git a/bsd/kern/sys_work_interval.c b/bsd/kern/sys_work_interval.c
new file mode 100644
index 000000000..45b36c717
--- /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);
+}