/* $OpenBSD: linux_sched.c,v 1.5 2004/11/23 19:08:52 miod Exp $ */ /* $NetBSD: linux_sched.c,v 1.6 2000/05/28 05:49:05 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 #include #include #include #include #include #include #include #include #include #include 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 = FORK_RFORK, 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); if (SCARG(uap, flags) & LINUX_CLONE_VM) flags |= FORK_SHAREVM; /* XXX We pretend to support CLONE_FS for the moment. */ if (SCARG(uap, flags) & LINUX_CLONE_FILES) flags |= FORK_SHAREFILES; if (SCARG(uap, flags) & LINUX_CLONE_SIGHAND) flags |= FORK_SIGHAND; 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_bsd_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, sig, flags, 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 but 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 but 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 but 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 but the default scheduling policy. */ if (SCARG(uap, policy) != LINUX_SCHED_OTHER) { *retval = -1; return (EINVAL); } *retval = 0; return (0); }