[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	7.24 (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;

struct getkerninfo_args {
	int	op;
	char	*where;
	int	*size;
	int	arg;
};
/* ARGSUSED */
getkerninfo(p, uap, retval)
	struct proc *p;
	register struct getkerninfo_args *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 = (struct proc *)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	*
9e97623a	7	* @(#)kern_sysctl.c 7.24 (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
9e97623a CT	27	struct getkerninfo_args {
	28	int op;
	29	char *where;
	30	int *size;
	31	int arg;
	32	};
8b24ca5d KM	33	/* ARGSUSED */
	34	getkerninfo(p, uap, retval)
	35	struct proc *p;
9e97623a	36	register struct getkerninfo_args *uap;
8b24ca5d KM	37	int *retval;
8b24ca5d KM	38	{
3789a403 MK	39	int bufsize; /* max size of users buffer */
3789a403 MK	40	int needed, locked, (*server)(), error = 0;
0a4df682	41
4a24f1b0 MT	42	switch (ki_type(uap->op)) {
	43
	44	case KINFO_PROC:
0a4df682 MT	45	server = kinfo_doproc;
	46	break;
	47
	48	case KINFO_RT:
	49	server = kinfo_rtable;
4a24f1b0 MT	50	break;
4a24f1b0 MT	51
452737be MT	52	case KINFO_VNODE:
	53	server = kinfo_vnode;
	54	break;
	55
318784c4 MT	56	case KINFO_FILE:
	57	server = kinfo_file;
	58	break;
	59
15415c71 KM	60	case KINFO_METER:
	61	server = kinfo_meter;
	62	break;
	63
61ece7fc KM	64	case KINFO_LOADAVG:
	65	server = kinfo_loadavg;
	66	break;
	67
	68	case KINFO_CLOCKRATE:
	69	server = kinfo_clockrate;
	70	break;
	71
4a24f1b0	72	default:
2ed8b3ea	73	error = EINVAL;
7acc8d38 MT	74	goto done;
	75	}
	76	if (uap->where == NULL \|\| uap->size == NULL) {
	77	error = (*server)(uap->op, NULL, NULL, uap->arg, &needed);
	78	goto done;
2ed8b3ea	79	}
aae5c50c RC	80	if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize,
	81	sizeof (bufsize)))
	82	goto done;
2ed8b3ea	83	while (kinfo_lock.kl_lock) {
13bbbe63 CT	84	kinfo_lock.kl_want = 1;
13bbbe63 CT	85	sleep((caddr_t)&kinfo_lock, PRIBIO+1);
2ed8b3ea	86	kinfo_lock.kl_locked++;
4a24f1b0	87	}
13bbbe63	88	kinfo_lock.kl_lock = 1;
2ed8b3ea	89
7acc8d38	90	if (!useracc(uap->where, bufsize, B_WRITE))
0a4df682	91	snderr(EFAULT);
452737be MT	92	if (server != kinfo_vnode) /* XXX */
452737be MT	93	vslock(uap->where, bufsize);
7acc8d38 MT	94	locked = bufsize;
7acc8d38 MT	95	error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed);
452737be MT	96	if (server != kinfo_vnode) /* XXX */
452737be MT	97	vsunlock(uap->where, locked, B_WRITE);
7acc8d38 MT	98	if (error == 0)
	99	error = copyout((caddr_t)&bufsize,
	100	(caddr_t)uap->size, sizeof (bufsize));
0a4df682	101	release:
13bbbe63 CT	102	kinfo_lock.kl_lock = 0;
	103	if (kinfo_lock.kl_want) {
	104	kinfo_lock.kl_want = 0;
	105	wakeup((caddr_t)&kinfo_lock);
	106	}
7acc8d38	107	done:
8b24ca5d KM	108	if (!error)
	109	*retval = needed;
	110	return (error);
4a24f1b0 MT	111	}
	112
	113	/*
	114	* try over estimating by 5 procs
	115	*/
	116	#define KINFO_PROCSLOP (5 * sizeof (struct kinfo_proc))
	117
2ed8b3ea	118	kinfo_doproc(op, where, acopysize, arg, aneeded)
13bbbe63	119	int op;
4a24f1b0	120	char *where;
13bbbe63	121	int acopysize, arg, aneeded;
4a24f1b0 MT	122	{
4a24f1b0 MT	123	register struct proc *p;
a65b44f0	124	register struct kinfo_proc dp = (struct kinfo_proc )where;
4a24f1b0	125	register needed = 0;
13bbbe63	126	int buflen = where != NULL ? *acopysize : 0;
4a24f1b0	127	int doingzomb;
7747bd3b	128	struct eproc eproc;
4a24f1b0 MT	129	int error = 0;
4a24f1b0 MT	130
80a8e5e6	131	p = (struct proc *)allproc;
4a24f1b0 MT	132	doingzomb = 0;
	133	again:
	134	for (; p != NULL; p = p->p_nxt) {
02ea4076 KM	135	/*
	136	* Skip embryonic processes.
	137	*/
	138	if (p->p_stat == SIDL)
	139	continue;
4a24f1b0 MT	140	/*
	141	* TODO - make more efficient (see notes below).
	142	* do by session.
	143	*/
	144	switch (ki_op(op)) {
	145
	146	case KINFO_PROC_PID:
	147	/* could do this with just a lookup */
	148	if (p->p_pid != (pid_t)arg)
	149	continue;
	150	break;
	151
	152	case KINFO_PROC_PGRP:
	153	/* could do this by traversing pgrp */
	154	if (p->p_pgrp->pg_id != (pid_t)arg)
	155	continue;
	156	break;
	157
	158	case KINFO_PROC_TTY:
	159	if ((p->p_flag&SCTTY) == 0 \|\|
	160	p->p_session->s_ttyp == NULL \|\|
	161	p->p_session->s_ttyp->t_dev != (dev_t)arg)
	162	continue;
	163	break;
	164
	165	case KINFO_PROC_UID:
3789a403	166	if (p->p_ucred->cr_uid != (uid_t)arg)
4a24f1b0 MT	167	continue;
	168	break;
	169
	170	case KINFO_PROC_RUID:
3789a403	171	if (p->p_cred->p_ruid != (uid_t)arg)
4a24f1b0 MT	172	continue;
	173	break;
	174	}
13bbbe63	175	if (buflen >= sizeof (struct kinfo_proc)) {
32041eb1	176	fill_eproc(p, &eproc);
a65b44f0	177	if (error = copyout((caddr_t)p, &dp->kp_proc,
4a24f1b0 MT	178	sizeof (struct proc)))
4a24f1b0 MT	179	return (error);
a65b44f0	180	if (error = copyout((caddr_t)&eproc, &dp->kp_eproc,
7747bd3b	181	sizeof (eproc)))
4a24f1b0	182	return (error);
a65b44f0	183	dp++;
4a24f1b0 MT	184	buflen -= sizeof (struct kinfo_proc);
	185	}
	186	needed += sizeof (struct kinfo_proc);
	187	}
	188	if (doingzomb == 0) {
	189	p = zombproc;
	190	doingzomb++;
	191	goto again;
	192	}
	193	if (where != NULL)
a65b44f0	194	*acopysize = (caddr_t)dp - where;
0a4df682 MT	195	else
0a4df682 MT	196	needed += KINFO_PROCSLOP;
4a24f1b0 MT	197	*aneeded = needed;
	198
	199	return (0);
	200	}
32041eb1 MK	201
	202	/*
	203	* Fill in an eproc structure for the specified process.
	204	*/
	205	void
	206	fill_eproc(p, ep)
	207	register struct proc *p;
	208	register struct eproc *ep;
	209	{
	210	register struct tty *tp;
	211
	212	ep->e_paddr = p;
	213	ep->e_sess = p->p_pgrp->pg_session;
	214	ep->e_pcred = *p->p_cred;
	215	ep->e_ucred = *p->p_ucred;
13bbbe63 CT	216	if (p->p_stat == SIDL \|\| p->p_stat == SZOMB) {
	217	ep->e_vm.vm_rssize = 0;
	218	ep->e_vm.vm_tsize = 0;
	219	ep->e_vm.vm_dsize = 0;
	220	ep->e_vm.vm_ssize = 0;
	221	#ifndef sparc
	222	/* ep->e_vm.vm_pmap = XXX; */
	223	#endif
	224	} else {
	225	register struct vmspace *vm = p->p_vmspace;
	226
	227	ep->e_vm.vm_rssize = vm->vm_rssize;
	228	ep->e_vm.vm_tsize = vm->vm_tsize;
	229	ep->e_vm.vm_dsize = vm->vm_dsize;
	230	ep->e_vm.vm_ssize = vm->vm_ssize;
	231	#ifndef sparc
	232	ep->e_vm.vm_pmap = vm->vm_pmap;
	233	#endif
	234	}
31c481fa MK	235	if (p->p_pptr)
	236	ep->e_ppid = p->p_pptr->p_pid;
	237	else
	238	ep->e_ppid = 0;
32041eb1 MK	239	ep->e_pgid = p->p_pgrp->pg_id;
	240	ep->e_jobc = p->p_pgrp->pg_jobc;
	241	if ((p->p_flag&SCTTY) &&
	242	(tp = ep->e_sess->s_ttyp)) {
	243	ep->e_tdev = tp->t_dev;
51d82109	244	ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
32041eb1 MK	245	ep->e_tsess = tp->t_session;
	246	} else
	247	ep->e_tdev = NODEV;
	248	ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
	249	if (SESS_LEADER(p))
	250	ep->e_flag \|= EPROC_SLEADER;
	251	if (p->p_wmesg)
	252	strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
	253	ep->e_xsize = ep->e_xrssize = 0;
	254	ep->e_xccount = ep->e_xswrss = 0;
	255	}
318784c4 MT	256
	257	/*
	258	* Get file structures.
	259	*/
	260	kinfo_file(op, where, acopysize, arg, aneeded)
13bbbe63	261	int op;
318784c4	262	register char *where;
13bbbe63	263	int acopysize, arg, aneeded;
318784c4 MT	264	{
	265	int buflen, needed, error;
	266	struct file *fp;
	267	char *start = where;
	268
	269	if (where == NULL) {
	270	/*
	271	* overestimate by 10 files
	272	*/
	273	*aneeded = sizeof (filehead) +
	274	(nfiles + 10) * sizeof (struct file);
	275	return (0);
	276	}
	277	buflen = *acopysize;
	278	needed = 0;
	279
	280	/*
	281	* first copyout filehead
	282	*/
	283	if (buflen > sizeof (filehead)) {
	284	if (error = copyout((caddr_t)&filehead, where,
	285	sizeof (filehead)))
	286	return (error);
	287	buflen -= sizeof (filehead);
	288	where += sizeof (filehead);
	289	}
	290	needed += sizeof (filehead);
	291
	292	/*
	293	* followed by an array of file structures
	294	*/
	295	for (fp = filehead; fp != NULL; fp = fp->f_filef) {
	296	if (buflen > sizeof (struct file)) {
	297	if (error = copyout((caddr_t)fp, where,
	298	sizeof (struct file)))
	299	return (error);
	300	buflen -= sizeof (struct file);
	301	where += sizeof (struct file);
	302	}
	303	needed += sizeof (struct file);
	304	}
	305	*acopysize = where - start;
	306	*aneeded = needed;
	307
	308	return (0);
	309	}