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NetBSD/sys/compat/linux/common/linux_sched.c

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/* $NetBSD: linux_sched.c,v 1.7 2000/08/25 01:04:12 thorpej Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center; by Matthias Scheler.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Linux compatibility module. Try to deal with scheduler related syscalls.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/syscallargs.h>
#include <machine/cpu.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/linux_syscallargs.h>
#include <compat/linux/common/linux_sched.h>
int
linux_sys_clone(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_clone_args /* {
syscallarg(int) flags;
syscallarg(void *) stack;
} */ *uap = v;
int flags, sig;
/*
* We don't support the Linux CLONE_PID or CLONE_PTRACE flags.
*/
if (SCARG(uap, flags) & (LINUX_CLONE_PID|LINUX_CLONE_PTRACE))
return (EINVAL);
flags = 0;
if (SCARG(uap, flags) & LINUX_CLONE_VM)
flags |= FORK_SHAREVM;
if (SCARG(uap, flags) & LINUX_CLONE_FS)
flags |= FORK_SHARECWD;
if (SCARG(uap, flags) & LINUX_CLONE_FILES)
flags |= FORK_SHAREFILES;
if (SCARG(uap, flags) & LINUX_CLONE_SIGHAND)
flags |= FORK_SHARESIGS;
if (SCARG(uap, flags) & LINUX_CLONE_VFORK)
flags |= FORK_PPWAIT;
sig = SCARG(uap, flags) & LINUX_CLONE_CSIGNAL;
if (sig < 0 || sig >= LINUX__NSIG)
return (EINVAL);
sig = linux_to_native_sig[sig];
/*
* Note that Linux does not provide a portable way of specifying
* the stack area; the caller must know if the stack grows up
* or down. So, we pass a stack size of 0, so that the code
* that makes this adjustment is a noop.
*/
return (fork1(p, flags, sig, SCARG(uap, stack), 0,
NULL, NULL, retval, NULL));
}
int
linux_sys_sched_setparam(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_setparam_args /* {
syscallarg(linux_pid_t) pid;
syscallarg(const struct linux_sched_param *) sp;
} */ *uap = v;
int error;
struct linux_sched_param lp;
struct proc *p;
/*
* We only check for valid parameters and return afterwards.
*/
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
return EINVAL;
error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
if (error)
return error;
if (SCARG(uap, pid) != 0) {
struct pcred *pc = cp->p_cred;
if ((p = pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
if (!(cp == p ||
pc->pc_ucred->cr_uid == 0 ||
pc->p_ruid == p->p_cred->p_ruid ||
pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
pc->p_ruid == p->p_ucred->cr_uid ||
pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
return EPERM;
}
return 0;
}
int
linux_sys_sched_getparam(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_getparam_args /* {
syscallarg(linux_pid_t) pid;
syscallarg(struct linux_sched_param *) sp;
} */ *uap = v;
struct proc *p;
struct linux_sched_param lp;
/*
* We only check for valid parameters and return a dummy priority afterwards.
*/
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
return EINVAL;
if (SCARG(uap, pid) != 0) {
struct pcred *pc = cp->p_cred;
if ((p = pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
if (!(cp == p ||
pc->pc_ucred->cr_uid == 0 ||
pc->p_ruid == p->p_cred->p_ruid ||
pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
pc->p_ruid == p->p_ucred->cr_uid ||
pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
return EPERM;
}
lp.sched_priority = 0;
return copyout(&lp, SCARG(uap, sp), sizeof(lp));
}
int
linux_sys_sched_setscheduler(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_setscheduler_args /* {
syscallarg(linux_pid_t) pid;
syscallarg(int) policy;
syscallarg(cont struct linux_sched_scheduler *) sp;
} */ *uap = v;
int error;
struct linux_sched_param lp;
struct proc *p;
/*
* We only check for valid parameters and return afterwards.
*/
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
return EINVAL;
error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
if (error)
return error;
if (SCARG(uap, pid) != 0) {
struct pcred *pc = cp->p_cred;
if ((p = pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
if (!(cp == p ||
pc->pc_ucred->cr_uid == 0 ||
pc->p_ruid == p->p_cred->p_ruid ||
pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
pc->p_ruid == p->p_ucred->cr_uid ||
pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
return EPERM;
}
/*
* We can't emulate anything put the default scheduling policy.
*/
if (SCARG(uap, policy) != LINUX_SCHED_OTHER || lp.sched_priority != 0)
return EINVAL;
return 0;
}
int
linux_sys_sched_getscheduler(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_getscheduler_args /* {
syscallarg(linux_pid_t) pid;
} */ *uap = v;
struct proc *p;
*retval = -1;
/*
* We only check for valid parameters and return afterwards.
*/
if (SCARG(uap, pid) != 0) {
struct pcred *pc = cp->p_cred;
if ((p = pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
if (!(cp == p ||
pc->pc_ucred->cr_uid == 0 ||
pc->p_ruid == p->p_cred->p_ruid ||
pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
pc->p_ruid == p->p_ucred->cr_uid ||
pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
return EPERM;
}
/*
* We can't emulate anything put the default scheduling policy.
*/
*retval = LINUX_SCHED_OTHER;
return 0;
}
int
linux_sys_sched_yield(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
need_resched(curcpu());
return 0;
}
int
linux_sys_sched_get_priority_max(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_get_priority_max_args /* {
syscallarg(int) policy;
} */ *uap = v;
/*
* We can't emulate anything put the default scheduling policy.
*/
if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
*retval = -1;
return EINVAL;
}
*retval = 0;
return 0;
}
int
linux_sys_sched_get_priority_min(cp, v, retval)
struct proc *cp;
void *v;
register_t *retval;
{
struct linux_sys_sched_get_priority_min_args /* {
syscallarg(int) policy;
} */ *uap = v;
/*
* We can't emulate anything put the default scheduling policy.
*/
if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
*retval = -1;
return EINVAL;
}
*retval = 0;
return 0;
}
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