272 lines
7.4 KiB
C
272 lines
7.4 KiB
C
/* $NetBSD: freebsd_sched.c,v 1.5 2006/10/12 01:30:47 christos Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center; by Matthias Scheler.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* FreeBSD compatibility module. Try to deal with scheduler related syscalls.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.5 2006/10/12 01:30:47 christos Exp $");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/syscallargs.h>
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#include <sys/kauth.h>
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#include <machine/cpu.h>
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#include <compat/freebsd/freebsd_syscallargs.h>
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#include <compat/freebsd/freebsd_sched.h>
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int
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freebsd_sys_yield(struct lwp *l __unused, void *v __unused,
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register_t *retval __unused)
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{
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yield();
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return 0;
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}
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int
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freebsd_sys_sched_setparam(struct lwp *l, void *v, register_t *retval __unused)
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{
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struct freebsd_sys_sched_setparam_args /* {
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syscallarg(pid_t) pid;
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syscallarg(const struct freebsd_sched_param *) sp;
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} */ *uap = v;
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int error;
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struct freebsd_sched_param lp;
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struct proc *p;
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/*
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* We only check for valid parameters and return afterwards.
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*/
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
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return EINVAL;
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error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
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if (error)
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return error;
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if (SCARG(uap, pid) != 0) {
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kauth_cred_t pc = l->l_cred;
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if ((p = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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if (!(l->l_proc == p ||
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kauth_cred_geteuid(pc) == 0 ||
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kauth_cred_getuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_getuid(pc) == kauth_cred_geteuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_geteuid(p->p_cred)))
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return EPERM;
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}
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return 0;
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}
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int
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freebsd_sys_sched_getparam(struct lwp *l, void *v, register_t *retval __unused)
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{
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struct freebsd_sys_sched_getparam_args /* {
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syscallarg(pid_t) pid;
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syscallarg(struct freebsd_sched_param *) sp;
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} */ *uap = v;
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struct proc *p;
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struct freebsd_sched_param lp;
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/*
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* We only check for valid parameters and return a dummy
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* priority afterwards.
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*/
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
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return EINVAL;
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if (SCARG(uap, pid) != 0) {
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kauth_cred_t pc = l->l_cred;
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if ((p = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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if (!(l->l_proc == p ||
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kauth_cred_geteuid(pc) == 0 ||
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kauth_cred_getuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_getuid(pc) == kauth_cred_geteuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_geteuid(p->p_cred)))
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return EPERM;
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}
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lp.sched_priority = 0;
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return copyout(&lp, SCARG(uap, sp), sizeof(lp));
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}
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int
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freebsd_sys_sched_setscheduler(struct lwp *l, void *v,
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register_t *retval __unused)
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{
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struct freebsd_sys_sched_setscheduler_args /* {
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syscallarg(pid_t) pid;
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syscallarg(int) policy;
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syscallarg(cont struct freebsd_sched_scheduler *) sp;
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} */ *uap = v;
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int error;
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struct freebsd_sched_param lp;
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struct proc *p;
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/*
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* We only check for valid parameters and return afterwards.
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*/
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
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return EINVAL;
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error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
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if (error)
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return error;
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if (SCARG(uap, pid) != 0) {
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kauth_cred_t pc = l->l_cred;
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if ((p = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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if (!(l->l_proc == p ||
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kauth_cred_geteuid(pc) == 0 ||
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kauth_cred_getuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_getuid(pc) == kauth_cred_geteuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_geteuid(p->p_cred)))
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return EPERM;
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}
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER || lp.sched_priority != 0)
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return EINVAL;
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return 0;
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}
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int
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freebsd_sys_sched_getscheduler(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct freebsd_sys_sched_getscheduler_args /* {
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syscallarg(pid_t) pid;
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} */ *uap = v;
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struct proc *p;
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*retval = -1;
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/*
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* We only check for valid parameters and return afterwards.
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*/
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if (SCARG(uap, pid) != 0) {
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kauth_cred_t pc = l->l_cred;
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if ((p = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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if (!(l->l_proc == p ||
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kauth_cred_geteuid(pc) == 0 ||
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kauth_cred_getuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_getuid(p->p_cred) ||
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kauth_cred_getuid(pc) == kauth_cred_geteuid(p->p_cred) ||
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kauth_cred_geteuid(pc) == kauth_cred_geteuid(p->p_cred)))
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return EPERM;
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}
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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*retval = FREEBSD_SCHED_OTHER;
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return 0;
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}
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int
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freebsd_sys_sched_yield(struct lwp *l __unused, void *v __unused,
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register_t *retval __unused)
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{
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yield();
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return 0;
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}
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int
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freebsd_sys_sched_get_priority_max(struct lwp *l __unused, void *v,
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register_t *retval)
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{
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struct freebsd_sys_sched_get_priority_max_args /* {
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syscallarg(int) policy;
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} */ *uap = v;
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
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*retval = -1;
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return EINVAL;
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}
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*retval = 0;
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return 0;
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}
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int
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freebsd_sys_sched_get_priority_min(struct lwp *l __unused, void *v,
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register_t *retval)
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{
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struct freebsd_sys_sched_get_priority_min_args /* {
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syscallarg(int) policy;
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} */ *uap = v;
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
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*retval = -1;
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return EINVAL;
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}
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*retval = 0;
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return 0;
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}
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