a0f75161f9
The p_can(...) construct was a premature (and, it turns out,
awkward) abstraction. The individual calls to p_canxxx() better
reflect differences between the inter-process authorization checks,
such as differing checks based on the type of signal. This has
a side effect of improving code readability.
o Replace direct credential authorization checks in ktrace() with
invocation of p_candebug(), while maintaining the special case
check of KTR_ROOT. This allows ktrace() to "play more nicely"
with new mandatory access control schemes, as well as making its
authorization checks consistent with other "debugging class"
checks.
o Eliminate "privused" construct for p_can*() calls which allowed the
caller to determine if privilege was required for successful
evaluation of the access control check. This primitive is currently
unused, and as such, serves only to complicate the API.
Approved by: ({procfs,linprocfs} changes) des
Obtained from: TrustedBSD Project
269 lines
6.3 KiB
C
269 lines
6.3 KiB
C
/*
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* Copyright (c) 1996, 1997, 1998
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* HD Associates, Inc. All rights reserved.
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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 HD Associates, Inc
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* p1003_1b: Real Time common code.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/sysent.h>
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#include <sys/syslog.h>
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#include <sys/sysproto.h>
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#include <posix4/posix4.h>
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MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
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/* The system calls return ENOSYS if an entry is called that is
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* not run-time supported. I am also logging since some programs
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* start to use this when they shouldn't. That will be removed if annoying.
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*/
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int
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syscall_not_present(struct proc *p, const char *s, struct nosys_args *uap)
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{
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log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
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p->p_comm, p->p_pid, s);
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/* a " return nosys(p, uap); " here causes a core dump.
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*/
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return ENOSYS;
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}
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#if !defined(_KPOSIX_PRIORITY_SCHEDULING)
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/* Not configured but loadable via a module:
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*/
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static int sched_attach(void)
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{
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return 0;
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}
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SYSCALL_NOT_PRESENT_GEN(sched_setparam)
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SYSCALL_NOT_PRESENT_GEN(sched_getparam)
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SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
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SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
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SYSCALL_NOT_PRESENT_GEN(sched_yield)
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SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
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SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
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SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
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#else
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/* Configured in kernel version:
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*/
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static struct ksched *ksched;
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static int sched_attach(void)
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{
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int ret = ksched_attach(&ksched);
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if (ret == 0)
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p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 1);
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return ret;
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}
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int sched_setparam(struct proc *p,
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struct sched_setparam_args *uap)
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{
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struct proc *targetp;
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int e;
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struct sched_param sched_param;
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e = copyin(uap->param, &sched_param, sizeof(sched_param));
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if (e)
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return (e);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL)
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return (ESRCH);
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}
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e = p_cansched(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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return (e);
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e = ksched_setparam(&p->p_retval[0], ksched, targetp,
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(const struct sched_param *)&sched_param);
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return (e);
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}
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int sched_getparam(struct proc *p,
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struct sched_getparam_args *uap)
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{
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int e;
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struct sched_param sched_param;
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struct proc *targetp;
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL)
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return (ESRCH);
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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return (e);
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e = ksched_getparam(&p->p_retval[0], ksched, targetp, &sched_param);
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if (e)
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return (e);
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e = copyout(&sched_param, uap->param, sizeof(sched_param));
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return (e);
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}
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int sched_setscheduler(struct proc *p,
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struct sched_setscheduler_args *uap)
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{
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int e;
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struct sched_param sched_param;
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struct proc *targetp;
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e = copyin(uap->param, &sched_param, sizeof(sched_param));
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if (e)
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return (e);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL)
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return (ESRCH);
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}
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e = p_cansched(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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return (e);
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e = ksched_setscheduler(&p->p_retval[0], ksched, targetp, uap->policy,
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(const struct sched_param *)&sched_param);
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return (e);
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}
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int sched_getscheduler(struct proc *p,
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struct sched_getscheduler_args *uap)
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{
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int e;
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struct proc *targetp;
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL)
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return (ESRCH);
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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return (e);
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e = ksched_getscheduler(&p->p_retval[0], ksched, targetp);
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return (e);
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}
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int sched_yield(struct proc *p,
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struct sched_yield_args *uap)
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{
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return ksched_yield(&p->p_retval[0], ksched);
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}
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int sched_get_priority_max(struct proc *p,
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struct sched_get_priority_max_args *uap)
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{
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return ksched_get_priority_max(&p->p_retval[0],
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ksched, uap->policy);
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}
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int sched_get_priority_min(struct proc *p,
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struct sched_get_priority_min_args *uap)
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{
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return ksched_get_priority_min(&p->p_retval[0],
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ksched, uap->policy);
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}
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int sched_rr_get_interval(struct proc *p,
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struct sched_rr_get_interval_args *uap)
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{
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int e;
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struct proc *targetp;
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL)
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return (ESRCH);
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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return (e);
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e = ksched_rr_get_interval(&p->p_retval[0], ksched, targetp,
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uap->interval);
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return (e);
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}
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#endif
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static void p31binit(void *notused)
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{
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(void) sched_attach();
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p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
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}
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SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);
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