2 * Copyright (c) 1996, 1997, 1998
3 * HD Associates, Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by HD Associates, Inc
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 /* p1003_1b: Real Time common code.
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "opt_posix.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
45 #include <sys/module.h>
46 #include <sys/mutex.h>
49 #include <sys/posix4.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/sysctl.h>
52 #include <sys/sysent.h>
53 #include <sys/syslog.h>
54 #include <sys/sysproto.h>
56 MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
58 /* The system calls return ENOSYS if an entry is called that is not run-time
59 * supported. I am also logging since some programs start to use this when
60 * they shouldn't. That will be removed if annoying.
63 syscall_not_present(struct thread *td, const char *s, struct nosys_args *uap)
65 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
66 td->td_name, td->td_proc->p_pid, s);
68 /* a " return nosys(p, uap); " here causes a core dump.
74 #if !defined(_KPOSIX_PRIORITY_SCHEDULING)
76 /* Not configured but loadable via a module:
85 SYSCALL_NOT_PRESENT_GEN(sched_setparam)
86 SYSCALL_NOT_PRESENT_GEN(sched_getparam)
87 SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
88 SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
89 SYSCALL_NOT_PRESENT_GEN(sched_yield)
90 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
91 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
92 SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
95 /* Configured in kernel version:
97 static struct ksched *ksched;
102 int ret = ksched_attach(&ksched);
105 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 200112L);
111 sys_sched_setparam(struct thread *td, struct sched_setparam_args *uap)
113 struct thread *targettd;
114 struct proc *targetp;
116 struct sched_param sched_param;
118 e = copyin(uap->param, &sched_param, sizeof(sched_param));
123 targetp = td->td_proc;
127 targetp = pfind(uap->pid);
130 targettd = FIRST_THREAD_IN_PROC(targetp);
133 e = kern_sched_setparam(td, targettd, &sched_param);
134 PROC_UNLOCK(targetp);
139 kern_sched_setparam(struct thread *td, struct thread *targettd,
140 struct sched_param *param)
142 struct proc *targetp;
145 targetp = targettd->td_proc;
146 PROC_LOCK_ASSERT(targetp, MA_OWNED);
148 error = p_cansched(td, targetp);
150 error = ksched_setparam(ksched, targettd,
151 (const struct sched_param *)param);
156 sys_sched_getparam(struct thread *td, struct sched_getparam_args *uap)
159 struct sched_param sched_param;
160 struct thread *targettd;
161 struct proc *targetp;
164 targetp = td->td_proc;
168 targetp = pfind(uap->pid);
169 if (targetp == NULL) {
172 targettd = FIRST_THREAD_IN_PROC(targetp);
175 e = kern_sched_getparam(td, targettd, &sched_param);
176 PROC_UNLOCK(targetp);
178 e = copyout(&sched_param, uap->param, sizeof(sched_param));
183 kern_sched_getparam(struct thread *td, struct thread *targettd,
184 struct sched_param *param)
186 struct proc *targetp;
189 targetp = targettd->td_proc;
190 PROC_LOCK_ASSERT(targetp, MA_OWNED);
192 error = p_cansee(td, targetp);
194 error = ksched_getparam(ksched, targettd, param);
199 sys_sched_setscheduler(struct thread *td, struct sched_setscheduler_args *uap)
202 struct sched_param sched_param;
203 struct thread *targettd;
204 struct proc *targetp;
206 e = copyin(uap->param, &sched_param, sizeof(sched_param));
211 targetp = td->td_proc;
215 targetp = pfind(uap->pid);
218 targettd = FIRST_THREAD_IN_PROC(targetp);
221 e = kern_sched_setscheduler(td, targettd, uap->policy,
223 PROC_UNLOCK(targetp);
228 kern_sched_setscheduler(struct thread *td, struct thread *targettd,
229 int policy, struct sched_param *param)
231 struct proc *targetp;
234 targetp = targettd->td_proc;
235 PROC_LOCK_ASSERT(targetp, MA_OWNED);
237 /* Don't allow non root user to set a scheduler policy. */
238 error = priv_check(td, PRIV_SCHED_SET);
242 error = p_cansched(td, targetp);
244 error = ksched_setscheduler(ksched, targettd, policy,
245 (const struct sched_param *)param);
250 sys_sched_getscheduler(struct thread *td, struct sched_getscheduler_args *uap)
253 struct thread *targettd;
254 struct proc *targetp;
257 targetp = td->td_proc;
261 targetp = pfind(uap->pid);
264 targettd = FIRST_THREAD_IN_PROC(targetp);
267 e = kern_sched_getscheduler(td, targettd, &policy);
268 PROC_UNLOCK(targetp);
270 td->td_retval[0] = policy;
276 kern_sched_getscheduler(struct thread *td, struct thread *targettd,
279 struct proc *targetp;
282 targetp = targettd->td_proc;
283 PROC_LOCK_ASSERT(targetp, MA_OWNED);
285 error = p_cansee(td, targetp);
287 error = ksched_getscheduler(ksched, targettd, policy);
292 sys_sched_yield(struct thread *td, struct sched_yield_args *uap)
295 sched_relinquish(curthread);
300 sys_sched_get_priority_max(struct thread *td,
301 struct sched_get_priority_max_args *uap)
305 error = ksched_get_priority_max(ksched, uap->policy, &prio);
306 td->td_retval[0] = prio;
311 sys_sched_get_priority_min(struct thread *td,
312 struct sched_get_priority_min_args *uap)
316 error = ksched_get_priority_min(ksched, uap->policy, &prio);
317 td->td_retval[0] = prio;
322 sys_sched_rr_get_interval(struct thread *td,
323 struct sched_rr_get_interval_args *uap)
325 struct timespec timespec;
328 error = kern_sched_rr_get_interval(td, uap->pid, ×pec);
330 error = copyout(×pec, uap->interval, sizeof(timespec));
335 kern_sched_rr_get_interval(struct thread *td, pid_t pid,
339 struct thread *targettd;
340 struct proc *targetp;
344 targetp = td->td_proc;
347 targetp = pfind(pid);
350 targettd = FIRST_THREAD_IN_PROC(targetp);
353 e = kern_sched_rr_get_interval_td(td, targettd, ts);
354 PROC_UNLOCK(targetp);
359 kern_sched_rr_get_interval_td(struct thread *td, struct thread *targettd,
365 p = targettd->td_proc;
366 PROC_LOCK_ASSERT(p, MA_OWNED);
368 error = p_cansee(td, p);
370 error = ksched_rr_get_interval(ksched, targettd, ts);
376 p31binit(void *notused)
378 (void) sched_attach();
379 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
382 SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);