2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1996, 1997, 1998
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17 * This product includes software developed by HD Associates, Inc
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35 /* p1003_1b: Real Time common code.
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include "opt_posix.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
47 #include <sys/module.h>
48 #include <sys/mutex.h>
51 #include <sys/posix4.h>
52 #include <sys/syscallsubr.h>
53 #include <sys/sysctl.h>
54 #include <sys/sysent.h>
55 #include <sys/syslog.h>
56 #include <sys/sysproto.h>
58 MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
60 /* The system calls return ENOSYS if an entry is called that is not run-time
61 * supported. I am also logging since some programs start to use this when
62 * they shouldn't. That will be removed if annoying.
65 syscall_not_present(struct thread *td, const char *s, struct nosys_args *uap)
67 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
68 td->td_name, td->td_proc->p_pid, s);
70 /* a " return nosys(p, uap); " here causes a core dump.
76 #if !defined(_KPOSIX_PRIORITY_SCHEDULING)
78 /* Not configured but loadable via a module:
87 SYSCALL_NOT_PRESENT_GEN(sched_setparam)
88 SYSCALL_NOT_PRESENT_GEN(sched_getparam)
89 SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
90 SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
91 SYSCALL_NOT_PRESENT_GEN(sched_yield)
92 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
93 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
94 SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
97 /* Configured in kernel version:
99 static struct ksched *ksched;
104 int ret = ksched_attach(&ksched);
107 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 200112L);
113 sys_sched_setparam(struct thread *td, struct sched_setparam_args *uap)
115 struct thread *targettd;
116 struct proc *targetp;
118 struct sched_param sched_param;
120 e = copyin(uap->param, &sched_param, sizeof(sched_param));
125 targetp = td->td_proc;
129 targetp = pfind(uap->pid);
132 targettd = FIRST_THREAD_IN_PROC(targetp);
135 e = kern_sched_setparam(td, targettd, &sched_param);
136 PROC_UNLOCK(targetp);
141 kern_sched_setparam(struct thread *td, struct thread *targettd,
142 struct sched_param *param)
144 struct proc *targetp;
147 targetp = targettd->td_proc;
148 PROC_LOCK_ASSERT(targetp, MA_OWNED);
150 error = p_cansched(td, targetp);
152 error = ksched_setparam(ksched, targettd,
153 (const struct sched_param *)param);
158 sys_sched_getparam(struct thread *td, struct sched_getparam_args *uap)
161 struct sched_param sched_param;
162 struct thread *targettd;
163 struct proc *targetp;
166 targetp = td->td_proc;
170 targetp = pfind(uap->pid);
171 if (targetp == NULL) {
174 targettd = FIRST_THREAD_IN_PROC(targetp);
177 e = kern_sched_getparam(td, targettd, &sched_param);
178 PROC_UNLOCK(targetp);
180 e = copyout(&sched_param, uap->param, sizeof(sched_param));
185 kern_sched_getparam(struct thread *td, struct thread *targettd,
186 struct sched_param *param)
188 struct proc *targetp;
191 targetp = targettd->td_proc;
192 PROC_LOCK_ASSERT(targetp, MA_OWNED);
194 error = p_cansee(td, targetp);
196 error = ksched_getparam(ksched, targettd, param);
201 sys_sched_setscheduler(struct thread *td, struct sched_setscheduler_args *uap)
204 struct sched_param sched_param;
205 struct thread *targettd;
206 struct proc *targetp;
208 e = copyin(uap->param, &sched_param, sizeof(sched_param));
213 targetp = td->td_proc;
217 targetp = pfind(uap->pid);
220 targettd = FIRST_THREAD_IN_PROC(targetp);
223 e = kern_sched_setscheduler(td, targettd, uap->policy,
225 PROC_UNLOCK(targetp);
230 kern_sched_setscheduler(struct thread *td, struct thread *targettd,
231 int policy, struct sched_param *param)
233 struct proc *targetp;
236 targetp = targettd->td_proc;
237 PROC_LOCK_ASSERT(targetp, MA_OWNED);
239 /* Don't allow non root user to set a scheduler policy. */
240 error = priv_check(td, PRIV_SCHED_SET);
244 error = p_cansched(td, targetp);
246 error = ksched_setscheduler(ksched, targettd, policy,
247 (const struct sched_param *)param);
252 sys_sched_getscheduler(struct thread *td, struct sched_getscheduler_args *uap)
255 struct thread *targettd;
256 struct proc *targetp;
259 targetp = td->td_proc;
263 targetp = pfind(uap->pid);
266 targettd = FIRST_THREAD_IN_PROC(targetp);
269 e = kern_sched_getscheduler(td, targettd, &policy);
270 PROC_UNLOCK(targetp);
272 td->td_retval[0] = policy;
278 kern_sched_getscheduler(struct thread *td, struct thread *targettd,
281 struct proc *targetp;
284 targetp = targettd->td_proc;
285 PROC_LOCK_ASSERT(targetp, MA_OWNED);
287 error = p_cansee(td, targetp);
289 error = ksched_getscheduler(ksched, targettd, policy);
294 sys_sched_yield(struct thread *td, struct sched_yield_args *uap)
297 sched_relinquish(td);
302 sys_sched_get_priority_max(struct thread *td,
303 struct sched_get_priority_max_args *uap)
307 error = ksched_get_priority_max(ksched, uap->policy, &prio);
308 td->td_retval[0] = prio;
313 sys_sched_get_priority_min(struct thread *td,
314 struct sched_get_priority_min_args *uap)
318 error = ksched_get_priority_min(ksched, uap->policy, &prio);
319 td->td_retval[0] = prio;
324 sys_sched_rr_get_interval(struct thread *td,
325 struct sched_rr_get_interval_args *uap)
327 struct timespec timespec;
330 error = kern_sched_rr_get_interval(td, uap->pid, ×pec);
332 error = copyout(×pec, uap->interval, sizeof(timespec));
337 kern_sched_rr_get_interval(struct thread *td, pid_t pid,
341 struct thread *targettd;
342 struct proc *targetp;
346 targetp = td->td_proc;
349 targetp = pfind(pid);
352 targettd = FIRST_THREAD_IN_PROC(targetp);
355 e = kern_sched_rr_get_interval_td(td, targettd, ts);
356 PROC_UNLOCK(targetp);
361 kern_sched_rr_get_interval_td(struct thread *td, struct thread *targettd,
367 p = targettd->td_proc;
368 PROC_LOCK_ASSERT(p, MA_OWNED);
370 error = p_cansee(td, p);
372 error = ksched_rr_get_interval(ksched, targettd, ts);
378 p31binit(void *notused)
380 (void) sched_attach();
381 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
384 SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);