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
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/sys/posix4/p1003_1b.c,v 1.5.2.2 2003/03/25 06:13:35 rwatson Exp $
35 /* p1003_1b: Real Time common code.
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/sysent.h>
42 #include <sys/malloc.h>
43 #include <sys/posix4.h>
45 #include <sys/syslog.h>
46 #include <sys/module.h>
47 #include <sys/sysmsg.h>
48 #include <sys/sysctl.h>
49 #include <sys/unistd.h>
51 MALLOC_DEFINE(M_P31B
, "p1003.1b", "Posix 1003.1B");
54 * p31b_proc: Return a proc struct corresponding to a pid to operate on.
56 * Enforce permission policy.
58 * The policy is the same as for sending signals except there
59 * is no notion of process groups.
61 * pid == 0 means my process.
63 * This is disabled until I've got a permission gate in again:
64 * only root can do this.
69 * This is stolen from CANSIGNAL in kern_sig:
71 * Can process p, with pcred pc, do "write flavor" operations to process q?
73 #define CAN_AFFECT(p, cr, q) \
74 ((cr)->cr_uid == 0 || \
75 (cr)->cr_ruid == (q)->p_ucred->cr_ruid || \
76 (cr)->cr_uid == (q)->p_ucred->cr_ruid || \
77 (cr)->cr_ruid == (q)->p_ucred->cr_uid || \
78 (cr)->cr_uid == (q)->p_ucred->cr_uid)
80 #define CAN_AFFECT(p, cr, q) ((cr)->cr_uid == 0)
83 #if !defined(_KPOSIX_PRIORITY_SCHEDULING)
85 int syscall_not_present(const char *s
);
87 /* The system calls return ENOSYS if an entry is called that is
88 * not run-time supported. I am also logging since some programs
89 * start to use this when they shouldn't. That will be removed if annoying.
91 int syscall_not_present(const char *s
)
93 struct proc
*p
= curproc
;
94 log(LOG_ERR
, "cmd %s pid %d tried to use non-present %s\n",
95 p
->p_comm
, p
->p_pid
, s
);
97 /* a " return nosys(p, uap); " here causes a core dump.
103 /* Not configured but loadable via a module:
106 static int sched_attach(void)
111 #define SYSCALL_NOT_PRESENT_GEN(SC) \
112 int sys_##SC (struct sysmsg *sysmsg, const struct SC##_args *uap) \
114 return syscall_not_present(#SC); \
117 SYSCALL_NOT_PRESENT_GEN(sched_setparam
)
118 SYSCALL_NOT_PRESENT_GEN(sched_getparam
)
119 SYSCALL_NOT_PRESENT_GEN(sched_setscheduler
)
120 SYSCALL_NOT_PRESENT_GEN(sched_getscheduler
)
121 SYSCALL_NOT_PRESENT_GEN(sched_yield
)
122 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max
)
123 SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min
)
124 SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval
)
129 * p31b_proc: Look up a proc from a PID. If proc is 0 it is
132 * Returns a held process in *pp.
136 p31b_proc(pid_t pid
, struct proc
**pp
)
139 struct proc
*p
= curproc
;
140 struct proc
*other_proc
;
147 other_proc
= pfind(pid
);
148 /* ref from pfind() */
152 /* Enforce permission policy.
154 if (CAN_AFFECT(p
, p
->p_ucred
, other_proc
)) {
156 lwkt_gettoken(&other_proc
->p_token
);
171 p31b_proc_done(struct proc
*other_proc
)
174 lwkt_reltoken(&other_proc
->p_token
);
179 /* Configured in kernel version:
181 static struct ksched
*ksched
;
183 static int sched_attach(void)
185 int ret
= ksched_attach(&ksched
);
188 p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING
, 1);
194 sys_sched_setparam(struct sysmsg
*sysmsg
,
195 const struct sched_setparam_args
*uap
)
199 struct sched_param sched_param
;
202 copyin(uap
->param
, &sched_param
, sizeof(sched_param
));
204 if ((e
= p31b_proc(uap
->pid
, &p
)) == 0) {
205 lp
= FIRST_LWP_IN_PROC(p
); /* XXX lwp */
208 lwkt_gettoken(&lp
->lwp_token
);
209 e
= ksched_setparam(&sysmsg
->sysmsg_reg
, ksched
, lp
,
210 (const struct sched_param
*)&sched_param
);
211 lwkt_reltoken(&lp
->lwp_token
);
222 sys_sched_getparam(struct sysmsg
*sysmsg
,
223 const struct sched_getparam_args
*uap
)
225 struct proc
*targetp
;
227 struct sched_param sched_param
;
230 if ((e
= p31b_proc(uap
->pid
, &targetp
)) == 0) {
231 lp
= FIRST_LWP_IN_PROC(targetp
); /* XXX lwp */
234 lwkt_gettoken(&lp
->lwp_token
);
235 e
= ksched_getparam(&sysmsg
->sysmsg_reg
, ksched
,
237 lwkt_reltoken(&lp
->lwp_token
);
242 p31b_proc_done(targetp
);
245 copyout(&sched_param
, uap
->param
, sizeof(sched_param
));
250 sys_sched_setscheduler(struct sysmsg
*sysmsg
,
251 const struct sched_setscheduler_args
*uap
)
256 struct sched_param sched_param
;
258 copyin(uap
->param
, &sched_param
, sizeof(sched_param
));
260 if ((e
= p31b_proc(uap
->pid
, &p
)) == 0) {
261 lp
= FIRST_LWP_IN_PROC(p
); /* XXX lwp */
264 lwkt_gettoken(&lp
->lwp_token
);
265 e
= ksched_setscheduler(&sysmsg
->sysmsg_reg
, ksched
,
267 (const struct sched_param
*)&sched_param
);
268 lwkt_reltoken(&lp
->lwp_token
);
279 sys_sched_getscheduler(struct sysmsg
*sysmsg
,
280 const struct sched_getscheduler_args
*uap
)
282 struct proc
*targetp
;
286 if ((e
= p31b_proc(uap
->pid
, &targetp
)) == 0) {
287 lp
= FIRST_LWP_IN_PROC(targetp
); /* XXX lwp */
290 lwkt_gettoken(&lp
->lwp_token
);
291 e
= ksched_getscheduler(&sysmsg
->sysmsg_reg
, ksched
, lp
);
292 lwkt_reltoken(&lp
->lwp_token
);
297 p31b_proc_done(targetp
);
306 sys_sched_yield(struct sysmsg
*sysmsg
,
307 const struct sched_yield_args
*uap
)
309 return ksched_yield(&sysmsg
->sysmsg_reg
, ksched
);
316 sys_sched_get_priority_max(struct sysmsg
*sysmsg
,
317 const struct sched_get_priority_max_args
*uap
)
319 return ksched_get_priority_max(&sysmsg
->sysmsg_reg
, ksched
, uap
->policy
);
326 sys_sched_get_priority_min(struct sysmsg
*sysmsg
,
327 const struct sched_get_priority_min_args
*uap
)
329 return ksched_get_priority_min(&sysmsg
->sysmsg_reg
, ksched
, uap
->policy
);
333 sys_sched_rr_get_interval(struct sysmsg
*sysmsg
,
334 const struct sched_rr_get_interval_args
*uap
)
341 if ((e
= p31b_proc(uap
->pid
, &p
)) == 0) {
342 lp
= FIRST_LWP_IN_PROC(p
); /* XXX lwp */
345 lwkt_gettoken(&lp
->lwp_token
);
346 e
= ksched_rr_get_interval(&sysmsg
->sysmsg_reg
, ksched
,
349 e
= copyout(&ts
, uap
->interval
, sizeof(ts
));
350 lwkt_reltoken(&lp
->lwp_token
);
363 p31binit(void *notused
)
366 p31b_setcfg(CTL_P1003_1B_ASYNCHRONOUS_IO
, -1);
367 p31b_setcfg(CTL_P1003_1B_FSYNC
, _POSIX_FSYNC
);
368 p31b_setcfg(CTL_P1003_1B_MAPPED_FILES
, _POSIX_MAPPED_FILES
);
369 p31b_setcfg(CTL_P1003_1B_MESSAGE_PASSING
, _POSIX_MESSAGE_PASSING
);
370 p31b_setcfg(CTL_P1003_1B_PAGESIZE
, PAGE_SIZE
);
371 p31b_setcfg(CTL_P1003_1B_SEMAPHORES
, _POSIX_SEMAPHORES
);
372 p31b_setcfg(CTL_P1003_1B_SEM_NSEMS_MAX
, 256);
373 p31b_setcfg(CTL_P1003_1B_SHARED_MEMORY_OBJECTS
,
374 _POSIX_SHARED_MEMORY_OBJECTS
);
376 #if 0 /* XXX missing */
377 p31b_setcfg(CTL_P1003_1B_ASYNCHRONOUS_IO
, _POSIX_ASYNCHRONOUS_IO
);
378 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX
, 0);
379 p31b_setcfg(CTL_P1003_1B_AIO_MAX
, 0);
380 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX
, 0);
381 p31b_setcfg(CTL_P1003_1B_DELAYTIMER_MAX
, 0);
382 p31b_setcfg(CTL_P1003_1B_MEMLOCK
, 0);
383 p31b_setcfg(CTL_P1003_1B_MEMLOCK_RANGE
, 0);
384 p31b_setcfg(CTL_P1003_1B_MEMORY_PROTECTION
, 0);
385 p31b_setcfg(CTL_P1003_1B_PRIORITIZED_IO
, _POSIX_PRIORITIZED_IO
);
386 p31b_setcfg(CTL_P1003_1B_REALTIME_SIGNALS
, _POSIX_REALTIME_SIGNALS
);
387 p31b_setcfg(CTL_P1003_1B_RTSIG_MAX
, SIGRTMAX
- SIGRTMIN
+ 1);
388 p31b_setcfg(CTL_P1003_1B_SIGQUEUE_MAX
, 0);
389 p31b_setcfg(CTL_P1003_1B_SYNCHRONIZED_IO
, _POSIX_SYNCHRONIZED_IO
);
390 p31b_setcfg(CTL_P1003_1B_TIMERS
, _POSIX_TIMERS
);
391 p31b_setcfg(CTL_P1003_1B_TIMER_MAX
, 0);
395 SYSINIT(p31b
, SI_SUB_P1003_1B
, SI_ORDER_FIRST
, p31binit
, NULL
);