Fix CPU stats percentages formatting
[dragonfly.git] / sys / kern / kern_p1003_1b.c
CommitLineData
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1/*
2 * Copyright (c) 1996, 1997, 1998
3 * HD Associates, Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
19 *
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
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: src/sys/posix4/p1003_1b.c,v 1.5.2.2 2003/03/25 06:13:35 rwatson Exp $
90b9818c 33 * $DragonFly: src/sys/kern/kern_p1003_1b.c,v 1.4 2003/07/26 18:12:45 dillon Exp $
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34 */
35
36/* p1003_1b: Real Time common code.
37 */
38
39#include <sys/param.h>
40#include <sys/systm.h>
41#include <sys/kernel.h>
42#include <sys/sysent.h>
43#include <sys/proc.h>
44#include <sys/syslog.h>
45#include <sys/module.h>
46#include <sys/sysproto.h>
47#include <sys/sysctl.h>
48
49#include <posix4/posix4.h>
50
51MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
52
53/* p31b_proc: Return a proc struct corresponding to a pid to operate on.
54 *
55 * Enforce permission policy.
56 *
57 * The policy is the same as for sending signals except there
58 * is no notion of process groups.
59 *
60 * pid == 0 means my process.
61 *
62 * This is disabled until I've got a permission gate in again:
63 * only root can do this.
64 */
65
66#if 0
67/*
68 * This is stolen from CANSIGNAL in kern_sig:
69 *
70 * Can process p, with pcred pc, do "write flavor" operations to process q?
71 */
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72#define CAN_AFFECT(p, cr, q) \
73 ((cr)->cr_uid == 0 || \
74 (cr)->cr_ruid == (q)->p_ucred->cr_ruid || \
75 (cr)->cr_uid == (q)->p_ucred->cr_ruid || \
76 (cr)->cr_ruid == (q)->p_ucred->cr_uid || \
77 (cr)->cr_uid == (q)->p_ucred->cr_uid)
984263bc 78#else
41c20dac 79#define CAN_AFFECT(p, cr, q) ((cr)->cr_uid == 0)
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80#endif
81
82/*
83 * p31b_proc: Look up a proc from a PID. If proc is 0 it is
84 * my own proc.
85 */
86int p31b_proc(struct proc *p, pid_t pid, struct proc **pp)
87{
88 int ret = 0;
89 struct proc *other_proc = 0;
90
91 if (pid == 0)
92 other_proc = p;
93 else
94 other_proc = pfind(pid);
95
96 if (other_proc)
97 {
98 /* Enforce permission policy.
99 */
41c20dac 100 if (CAN_AFFECT(p, p->p_ucred, other_proc))
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101 *pp = other_proc;
102 else
103 ret = EPERM;
104 }
105 else
106 ret = ESRCH;
107
108 return ret;
109}
110
111/* The system calls return ENOSYS if an entry is called that is
112 * not run-time supported. I am also logging since some programs
113 * start to use this when they shouldn't. That will be removed if annoying.
114 */
115int
116syscall_not_present(struct proc *p, const char *s, struct nosys_args *uap)
117{
118 log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
119 p->p_comm, p->p_pid, s);
120
121 /* a " return nosys(p, uap); " here causes a core dump.
122 */
123
124 return ENOSYS;
125}
126
127#if !defined(_KPOSIX_PRIORITY_SCHEDULING)
128
129/* Not configured but loadable via a module:
130 */
131
132static int sched_attach(void)
133{
134 return 0;
135}
136
137SYSCALL_NOT_PRESENT_GEN(sched_setparam)
138SYSCALL_NOT_PRESENT_GEN(sched_getparam)
139SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
140SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
141SYSCALL_NOT_PRESENT_GEN(sched_yield)
142SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
143SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
144SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
145
146#else
147
148/* Configured in kernel version:
149 */
150static struct ksched *ksched;
151
152static int sched_attach(void)
153{
154 int ret = ksched_attach(&ksched);
155
156 if (ret == 0)
157 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 1);
158
159 return ret;
160}
161
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162int
163sched_setparam(struct sched_setparam_args *uap)
984263bc 164{
41c20dac 165 struct proc *p = curproc;
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166 int e;
167
168 struct sched_param sched_param;
169 copyin(uap->param, &sched_param, sizeof(sched_param));
170
41c20dac 171 if ((e = p31b_proc(p, uap->pid, &p)) == 0) {
90b9818c 172 e = ksched_setparam(&uap->lmsg.u.ms_result, ksched, p,
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173 (const struct sched_param *)&sched_param);
174 }
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175 return e;
176}
177
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178int
179sched_getparam(struct sched_getparam_args *uap)
984263bc 180{
41c20dac 181 struct proc *p = curproc;
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182 struct proc *targetp;
183 struct sched_param sched_param;
184 int e;
185
186 if (uap->pid != 0 && uap->pid != p->p_pid) {
187 e = p31b_proc(p, uap->pid, &targetp);
188 if (e)
189 return e;
41c20dac 190 } else {
984263bc 191 targetp = p;
41c20dac 192 }
984263bc 193
90b9818c 194 e = ksched_getparam(&uap->lmsg.u.ms_result, ksched, targetp, &sched_param);
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195
196 if (!e)
197 copyout(&sched_param, uap->param, sizeof(sched_param));
198
199 return e;
200}
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201
202int
203sched_setscheduler(struct sched_setscheduler_args *uap)
984263bc 204{
41c20dac 205 struct proc *p = curproc;
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206 int e;
207
208 struct sched_param sched_param;
209 copyin(uap->param, &sched_param, sizeof(sched_param));
210
41c20dac 211 if ((e = p31b_proc(p, uap->pid, &p)) == 0) {
90b9818c 212 e = ksched_setscheduler(&uap->lmsg.u.ms_result, ksched, p,
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213 uap->policy, (const struct sched_param *)&sched_param);
214 }
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215 return e;
216}
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217
218int
219sched_getscheduler(struct sched_getscheduler_args *uap)
984263bc 220{
41c20dac 221 struct proc *p = curproc;
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222 struct proc *targetp;
223 int e;
224
225 if (uap->pid != 0 && uap->pid != p->p_pid) {
226 e = p31b_proc(p, uap->pid, &targetp);
227 if (e)
228 return e;
41c20dac 229 } else {
984263bc 230 targetp = p;
41c20dac 231 }
984263bc 232
90b9818c 233 e = ksched_getscheduler(&uap->lmsg.u.ms_result, ksched, targetp);
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234
235 return e;
236}
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237
238int
239sched_yield(struct sched_yield_args *uap)
984263bc 240{
90b9818c 241 return ksched_yield(&uap->lmsg.u.ms_result, ksched);
984263bc 242}
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243
244int
245sched_get_priority_max(struct sched_get_priority_max_args *uap)
984263bc 246{
90b9818c 247 return ksched_get_priority_max(&uap->lmsg.u.ms_result, ksched, uap->policy);
984263bc 248}
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249
250int
251sched_get_priority_min(struct sched_get_priority_min_args *uap)
984263bc 252{
90b9818c 253 return ksched_get_priority_min(&uap->lmsg.u.ms_result, ksched, uap->policy);
984263bc 254}
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255
256int
257sched_rr_get_interval(struct sched_rr_get_interval_args *uap)
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258{
259 int e;
41c20dac 260 struct proc *p = curproc;
984263bc 261
41c20dac 262 if ((e = p31b_proc(p, uap->pid, &p)) == 0) {
90b9818c 263 e = ksched_rr_get_interval(&uap->lmsg.u.ms_result, ksched,
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264 p, uap->interval);
265 }
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266 return e;
267}
268
269#endif
270
271static void p31binit(void *notused)
272{
273 (void) sched_attach();
274 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
275}
276
277SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);