[unix-history] / usr / src / sys / kern / kern_sysctl.c

/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)kern_sysctl.c	7.22 (Berkeley) %G%
 */

#include "param.h"
#include "proc.h"
#include "kinfo.h"
#include "ioctl.h"
#include "tty.h"
#include "buf.h"
#include "file.h"

#include "vm/vm.h"

#include "kinfo_proc.h"

#define snderr(e) { error = (e); goto release;}
extern int kinfo_doproc(), kinfo_rtable(), kinfo_vnode(), kinfo_file();
extern int kinfo_meter(), kinfo_loadavg(), kinfo_clockrate();
struct kinfo_lock kinfo_lock;

/* ARGSUSED */
getkerninfo(p, uap, retval)
	struct proc *p;
	register struct args {
		int	op;
		char	*where;
		int	*size;
		int	arg;
	} *uap;
	int *retval;
{
	int bufsize;		/* max size of users buffer */
	int needed, locked, (*server)(), error = 0;

	switch (ki_type(uap->op)) {

	case KINFO_PROC:
		server = kinfo_doproc;
		break;

	case KINFO_RT:
		server = kinfo_rtable;
		break;

	case KINFO_VNODE:
		server = kinfo_vnode;
		break;

	case KINFO_FILE:
		server = kinfo_file;
		break;

	case KINFO_METER:
		server = kinfo_meter;
		break;

	case KINFO_LOADAVG:
		server = kinfo_loadavg;
		break;

	case KINFO_CLOCKRATE:
		server = kinfo_clockrate;
		break;

	default:
		error = EINVAL;
		goto done;
	}
	if (uap->where == NULL || uap->size == NULL) {
		error = (*server)(uap->op, NULL, NULL, uap->arg, &needed);
		goto done;
	}
	if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize,
	    sizeof (bufsize)))
		goto done;
	while (kinfo_lock.kl_lock) {
		kinfo_lock.kl_want = 1;
		sleep((caddr_t)&kinfo_lock, PRIBIO+1);
		kinfo_lock.kl_locked++;
	}
	kinfo_lock.kl_lock = 1;

	if (!useracc(uap->where, bufsize, B_WRITE))
		snderr(EFAULT);
	if (server != kinfo_vnode)	/* XXX */
		vslock(uap->where, bufsize);
	locked = bufsize;
	error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed);
	if (server != kinfo_vnode)	/* XXX */
		vsunlock(uap->where, locked, B_WRITE);
	if (error == 0)
		error = copyout((caddr_t)&bufsize,
				(caddr_t)uap->size, sizeof (bufsize));
release:
	kinfo_lock.kl_lock = 0;
	if (kinfo_lock.kl_want) {
		kinfo_lock.kl_want = 0;
		wakeup((caddr_t)&kinfo_lock);
	}
done:
	if (!error)
		*retval = needed;
	return (error);
}

/* 
 * try over estimating by 5 procs 
 */
#define KINFO_PROCSLOP	(5 * sizeof (struct kinfo_proc))

kinfo_doproc(op, where, acopysize, arg, aneeded)
	int op;
	char *where;
	int *acopysize, arg, *aneeded;
{
	register struct proc *p;
	register struct kinfo_proc *dp = (struct kinfo_proc *)where;
	register needed = 0;
	int buflen = where != NULL ? *acopysize : 0;
	int doingzomb;
	struct eproc eproc;
	int error = 0;

	p = allproc;
	doingzomb = 0;
again:
	for (; p != NULL; p = p->p_nxt) {
		/*
		 * Skip embryonic processes.
		 */
		if (p->p_stat == SIDL)
			continue;
		/* 
		 * TODO - make more efficient (see notes below).
		 * do by session. 
		 */
		switch (ki_op(op)) {

		case KINFO_PROC_PID:
			/* could do this with just a lookup */
			if (p->p_pid != (pid_t)arg)
				continue;
			break;

		case KINFO_PROC_PGRP:
			/* could do this by traversing pgrp */
			if (p->p_pgrp->pg_id != (pid_t)arg)
				continue;
			break;

		case KINFO_PROC_TTY:
			if ((p->p_flag&SCTTY) == 0 || 
			    p->p_session->s_ttyp == NULL ||
			    p->p_session->s_ttyp->t_dev != (dev_t)arg)
				continue;
			break;

		case KINFO_PROC_UID:
			if (p->p_ucred->cr_uid != (uid_t)arg)
				continue;
			break;

		case KINFO_PROC_RUID:
			if (p->p_cred->p_ruid != (uid_t)arg)
				continue;
			break;
		}
		if (buflen >= sizeof (struct kinfo_proc)) {
			fill_eproc(p, &eproc);
			if (error = copyout((caddr_t)p, &dp->kp_proc, 
			    sizeof (struct proc)))
				return (error);
			if (error = copyout((caddr_t)&eproc, &dp->kp_eproc, 
			    sizeof (eproc)))
				return (error);
			dp++;
			buflen -= sizeof (struct kinfo_proc);
		}
		needed += sizeof (struct kinfo_proc);
	}
	if (doingzomb == 0) {
		p = zombproc;
		doingzomb++;
		goto again;
	}
	if (where != NULL)
		*acopysize = (caddr_t)dp - where;
	else
		needed += KINFO_PROCSLOP;
	*aneeded = needed;

	return (0);
}

/*
 * Fill in an eproc structure for the specified process.
 */
void
fill_eproc(p, ep)
	register struct proc *p;
	register struct eproc *ep;
{
	register struct tty *tp;

	ep->e_paddr = p;
	ep->e_sess = p->p_pgrp->pg_session;
	ep->e_pcred = *p->p_cred;
	ep->e_ucred = *p->p_ucred;
	if (p->p_stat == SIDL || p->p_stat == SZOMB) {
		ep->e_vm.vm_rssize = 0;
		ep->e_vm.vm_tsize = 0;
		ep->e_vm.vm_dsize = 0;
		ep->e_vm.vm_ssize = 0;
#ifndef sparc
		/* ep->e_vm.vm_pmap = XXX; */
#endif
	} else {
		register struct vmspace *vm = p->p_vmspace;

		ep->e_vm.vm_rssize = vm->vm_rssize;
		ep->e_vm.vm_tsize = vm->vm_tsize;
		ep->e_vm.vm_dsize = vm->vm_dsize;
		ep->e_vm.vm_ssize = vm->vm_ssize;
#ifndef sparc
		ep->e_vm.vm_pmap = vm->vm_pmap;
#endif
	}
	if (p->p_pptr)
		ep->e_ppid = p->p_pptr->p_pid;
	else
		ep->e_ppid = 0;
	ep->e_pgid = p->p_pgrp->pg_id;
	ep->e_jobc = p->p_pgrp->pg_jobc;
	if ((p->p_flag&SCTTY) && 
	     (tp = ep->e_sess->s_ttyp)) {
		ep->e_tdev = tp->t_dev;
		ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
		ep->e_tsess = tp->t_session;
	} else
		ep->e_tdev = NODEV;
	ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
	if (SESS_LEADER(p))
		ep->e_flag |= EPROC_SLEADER;
	if (p->p_wmesg)
		strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
	ep->e_xsize = ep->e_xrssize = 0;
	ep->e_xccount = ep->e_xswrss = 0;
}

/*
 * Get file structures.
 */
kinfo_file(op, where, acopysize, arg, aneeded)
	int op;
	register char *where;
	int *acopysize, arg, *aneeded;
{
	int buflen, needed, error;
	struct file *fp;
	char *start = where;

	if (where == NULL) {
		/*
		 * overestimate by 10 files
		 */
		*aneeded = sizeof (filehead) + 
			(nfiles + 10) * sizeof (struct file);
		return (0);
	}
	buflen = *acopysize;
	needed = 0;

	/*
	 * first copyout filehead
	 */
	if (buflen > sizeof (filehead)) {
		if (error = copyout((caddr_t)&filehead, where,
		    sizeof (filehead)))
			return (error);
		buflen -= sizeof (filehead);
		where += sizeof (filehead);
	}
	needed += sizeof (filehead);

	/*
	 * followed by an array of file structures
	 */
	for (fp = filehead; fp != NULL; fp = fp->f_filef) {
		if (buflen > sizeof (struct file)) {
			if (error = copyout((caddr_t)fp, where,
			    sizeof (struct file)))
				return (error);
			buflen -= sizeof (struct file);
			where += sizeof (struct file);
		}
		needed += sizeof (struct file);
	}
	*acopysize = where - start;
	*aneeded = needed;

	return (0);
}
Commit	Line	Data
4a24f1b0 MT	1	/*
	2	* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
	3	* All rights reserved.
	4	*
dbf0c423	5	* %sccs.include.redist.c%
4a24f1b0	6	*
02ea4076	7	* @(#)kern_sysctl.c 7.22 (Berkeley) %G%
4a24f1b0 MT	8	*/
4a24f1b0 MT	9
9fbbcc07	10	#include "param.h"
9fbbcc07	11	#include "proc.h"
4a24f1b0	12	#include "kinfo.h"
4a24f1b0 MT	13	#include "ioctl.h"
	14	#include "tty.h"
	15	#include "buf.h"
318784c4	16	#include "file.h"
4a24f1b0	17
32041eb1 MK	18	#include "vm/vm.h"
	19
	20	#include "kinfo_proc.h"
	21
0a4df682	22	#define snderr(e) { error = (e); goto release;}
318784c4	23	extern int kinfo_doproc(), kinfo_rtable(), kinfo_vnode(), kinfo_file();
61ece7fc	24	extern int kinfo_meter(), kinfo_loadavg(), kinfo_clockrate();
0a4df682 MT	25	struct kinfo_lock kinfo_lock;
0a4df682 MT	26
8b24ca5d KM	27	/* ARGSUSED */
	28	getkerninfo(p, uap, retval)
	29	struct proc *p;
	30	register struct args {
4a24f1b0 MT	31	int op;
	32	char *where;
	33	int *size;
	34	int arg;
8b24ca5d KM	35	} *uap;
	36	int *retval;
	37	{
3789a403 MK	38	int bufsize; /* max size of users buffer */
3789a403 MK	39	int needed, locked, (*server)(), error = 0;
0a4df682	40
4a24f1b0 MT	41	switch (ki_type(uap->op)) {
	42
	43	case KINFO_PROC:
0a4df682 MT	44	server = kinfo_doproc;
	45	break;
	46
	47	case KINFO_RT:
	48	server = kinfo_rtable;
4a24f1b0 MT	49	break;
4a24f1b0 MT	50
452737be MT	51	case KINFO_VNODE:
	52	server = kinfo_vnode;
	53	break;
	54
318784c4 MT	55	case KINFO_FILE:
	56	server = kinfo_file;
	57	break;
	58
15415c71 KM	59	case KINFO_METER:
	60	server = kinfo_meter;
	61	break;
	62
61ece7fc KM	63	case KINFO_LOADAVG:
	64	server = kinfo_loadavg;
	65	break;
	66
	67	case KINFO_CLOCKRATE:
	68	server = kinfo_clockrate;
	69	break;
	70
4a24f1b0	71	default:
2ed8b3ea	72	error = EINVAL;
7acc8d38 MT	73	goto done;
	74	}
	75	if (uap->where == NULL \|\| uap->size == NULL) {
	76	error = (*server)(uap->op, NULL, NULL, uap->arg, &needed);
	77	goto done;
2ed8b3ea	78	}
aae5c50c RC	79	if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize,
	80	sizeof (bufsize)))
	81	goto done;
2ed8b3ea	82	while (kinfo_lock.kl_lock) {
13bbbe63 CT	83	kinfo_lock.kl_want = 1;
13bbbe63 CT	84	sleep((caddr_t)&kinfo_lock, PRIBIO+1);
2ed8b3ea	85	kinfo_lock.kl_locked++;
4a24f1b0	86	}
13bbbe63	87	kinfo_lock.kl_lock = 1;
2ed8b3ea	88
7acc8d38	89	if (!useracc(uap->where, bufsize, B_WRITE))
0a4df682	90	snderr(EFAULT);
452737be MT	91	if (server != kinfo_vnode) /* XXX */
452737be MT	92	vslock(uap->where, bufsize);
7acc8d38 MT	93	locked = bufsize;
7acc8d38 MT	94	error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed);
452737be MT	95	if (server != kinfo_vnode) /* XXX */
452737be MT	96	vsunlock(uap->where, locked, B_WRITE);
7acc8d38 MT	97	if (error == 0)
	98	error = copyout((caddr_t)&bufsize,
	99	(caddr_t)uap->size, sizeof (bufsize));
0a4df682	100	release:
13bbbe63 CT	101	kinfo_lock.kl_lock = 0;
	102	if (kinfo_lock.kl_want) {
	103	kinfo_lock.kl_want = 0;
	104	wakeup((caddr_t)&kinfo_lock);
	105	}
7acc8d38	106	done:
8b24ca5d KM	107	if (!error)
	108	*retval = needed;
	109	return (error);
4a24f1b0 MT	110	}
	111
	112	/*
	113	* try over estimating by 5 procs
	114	*/
	115	#define KINFO_PROCSLOP (5 * sizeof (struct kinfo_proc))
	116
2ed8b3ea	117	kinfo_doproc(op, where, acopysize, arg, aneeded)
13bbbe63	118	int op;
4a24f1b0	119	char *where;
13bbbe63	120	int acopysize, arg, aneeded;
4a24f1b0 MT	121	{
4a24f1b0 MT	122	register struct proc *p;
a65b44f0	123	register struct kinfo_proc dp = (struct kinfo_proc )where;
4a24f1b0	124	register needed = 0;
13bbbe63	125	int buflen = where != NULL ? *acopysize : 0;
4a24f1b0	126	int doingzomb;
7747bd3b	127	struct eproc eproc;
4a24f1b0 MT	128	int error = 0;
4a24f1b0 MT	129
4a24f1b0 MT	130	p = allproc;
	131	doingzomb = 0;
	132	again:
	133	for (; p != NULL; p = p->p_nxt) {
02ea4076 KM	134	/*
	135	* Skip embryonic processes.
	136	*/
	137	if (p->p_stat == SIDL)
	138	continue;
4a24f1b0 MT	139	/*
	140	* TODO - make more efficient (see notes below).
	141	* do by session.
	142	*/
	143	switch (ki_op(op)) {
	144
	145	case KINFO_PROC_PID:
	146	/* could do this with just a lookup */
	147	if (p->p_pid != (pid_t)arg)
	148	continue;
	149	break;
	150
	151	case KINFO_PROC_PGRP:
	152	/* could do this by traversing pgrp */
	153	if (p->p_pgrp->pg_id != (pid_t)arg)
	154	continue;
	155	break;
	156
	157	case KINFO_PROC_TTY:
	158	if ((p->p_flag&SCTTY) == 0 \|\|
	159	p->p_session->s_ttyp == NULL \|\|
	160	p->p_session->s_ttyp->t_dev != (dev_t)arg)
	161	continue;
	162	break;
	163
	164	case KINFO_PROC_UID:
3789a403	165	if (p->p_ucred->cr_uid != (uid_t)arg)
4a24f1b0 MT	166	continue;
	167	break;
	168
	169	case KINFO_PROC_RUID:
3789a403	170	if (p->p_cred->p_ruid != (uid_t)arg)
4a24f1b0 MT	171	continue;
	172	break;
	173	}
13bbbe63	174	if (buflen >= sizeof (struct kinfo_proc)) {
32041eb1	175	fill_eproc(p, &eproc);
a65b44f0	176	if (error = copyout((caddr_t)p, &dp->kp_proc,
4a24f1b0 MT	177	sizeof (struct proc)))
4a24f1b0 MT	178	return (error);
a65b44f0	179	if (error = copyout((caddr_t)&eproc, &dp->kp_eproc,
7747bd3b	180	sizeof (eproc)))
4a24f1b0	181	return (error);
a65b44f0	182	dp++;
4a24f1b0 MT	183	buflen -= sizeof (struct kinfo_proc);
	184	}
	185	needed += sizeof (struct kinfo_proc);
	186	}
	187	if (doingzomb == 0) {
	188	p = zombproc;
	189	doingzomb++;
	190	goto again;
	191	}
	192	if (where != NULL)
a65b44f0	193	*acopysize = (caddr_t)dp - where;
0a4df682 MT	194	else
0a4df682 MT	195	needed += KINFO_PROCSLOP;
4a24f1b0 MT	196	*aneeded = needed;
	197
	198	return (0);
	199	}
32041eb1 MK	200
	201	/*
	202	* Fill in an eproc structure for the specified process.
	203	*/
	204	void
	205	fill_eproc(p, ep)
	206	register struct proc *p;
	207	register struct eproc *ep;
	208	{
	209	register struct tty *tp;
	210
	211	ep->e_paddr = p;
	212	ep->e_sess = p->p_pgrp->pg_session;
	213	ep->e_pcred = *p->p_cred;
	214	ep->e_ucred = *p->p_ucred;
13bbbe63 CT	215	if (p->p_stat == SIDL \|\| p->p_stat == SZOMB) {
	216	ep->e_vm.vm_rssize = 0;
	217	ep->e_vm.vm_tsize = 0;
	218	ep->e_vm.vm_dsize = 0;
	219	ep->e_vm.vm_ssize = 0;
	220	#ifndef sparc
	221	/* ep->e_vm.vm_pmap = XXX; */
	222	#endif
	223	} else {
	224	register struct vmspace *vm = p->p_vmspace;
	225
	226	ep->e_vm.vm_rssize = vm->vm_rssize;
	227	ep->e_vm.vm_tsize = vm->vm_tsize;
	228	ep->e_vm.vm_dsize = vm->vm_dsize;
	229	ep->e_vm.vm_ssize = vm->vm_ssize;
	230	#ifndef sparc
	231	ep->e_vm.vm_pmap = vm->vm_pmap;
	232	#endif
	233	}
31c481fa MK	234	if (p->p_pptr)
	235	ep->e_ppid = p->p_pptr->p_pid;
	236	else
	237	ep->e_ppid = 0;
32041eb1 MK	238	ep->e_pgid = p->p_pgrp->pg_id;
	239	ep->e_jobc = p->p_pgrp->pg_jobc;
	240	if ((p->p_flag&SCTTY) &&
	241	(tp = ep->e_sess->s_ttyp)) {
	242	ep->e_tdev = tp->t_dev;
51d82109	243	ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
32041eb1 MK	244	ep->e_tsess = tp->t_session;
	245	} else
	246	ep->e_tdev = NODEV;
	247	ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
	248	if (SESS_LEADER(p))
	249	ep->e_flag \|= EPROC_SLEADER;
	250	if (p->p_wmesg)
	251	strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
	252	ep->e_xsize = ep->e_xrssize = 0;
	253	ep->e_xccount = ep->e_xswrss = 0;
	254	}
318784c4 MT	255
	256	/*
	257	* Get file structures.
	258	*/
	259	kinfo_file(op, where, acopysize, arg, aneeded)
13bbbe63	260	int op;
318784c4	261	register char *where;
13bbbe63	262	int acopysize, arg, aneeded;
318784c4 MT	263	{
	264	int buflen, needed, error;
	265	struct file *fp;
	266	char *start = where;
	267
	268	if (where == NULL) {
	269	/*
	270	* overestimate by 10 files
	271	*/
	272	*aneeded = sizeof (filehead) +
	273	(nfiles + 10) * sizeof (struct file);
	274	return (0);
	275	}
	276	buflen = *acopysize;
	277	needed = 0;
	278
	279	/*
	280	* first copyout filehead
	281	*/
	282	if (buflen > sizeof (filehead)) {
	283	if (error = copyout((caddr_t)&filehead, where,
	284	sizeof (filehead)))
	285	return (error);
	286	buflen -= sizeof (filehead);
	287	where += sizeof (filehead);
	288	}
	289	needed += sizeof (filehead);
	290
	291	/*
	292	* followed by an array of file structures
	293	*/
	294	for (fp = filehead; fp != NULL; fp = fp->f_filef) {
	295	if (buflen > sizeof (struct file)) {
	296	if (error = copyout((caddr_t)fp, where,
	297	sizeof (struct file)))
	298	return (error);
	299	buflen -= sizeof (struct file);
	300	where += sizeof (struct file);
	301	}
	302	needed += sizeof (struct file);
	303	}
	304	*acopysize = where - start;
	305	*aneeded = needed;
	306
	307	return (0);
	308	}