1c346c7092
it assumes all of the data exists in the kernel. Also, fix sysctl_new-kernel (unused until now) which had reversed operands to bcopy(). Reviewed by: phk Poul writes: ... actually the lock/sleep/wakeup cruft shouldn't be needed in the kernel version I think, but just leave it there for now.
1076 lines
23 KiB
C
1076 lines
23 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
|
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* Mike Karels at Berkeley Software Design, Inc.
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*
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* Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
|
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* project, to make these variables more userfriendly.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
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* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
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* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
|
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* without specific prior written permission.
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|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*
|
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* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
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* $Id: kern_sysctl.c,v 1.63 1996/06/06 17:17:54 phk Exp $
|
|
*/
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|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysproto.h>
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <sys/vnode.h>
|
|
|
|
/*
|
|
* Locking and stats
|
|
*/
|
|
static struct sysctl_lock {
|
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int sl_lock;
|
|
int sl_want;
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|
int sl_locked;
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|
} memlock;
|
|
|
|
static int sysctl_root SYSCTL_HANDLER_ARGS;
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|
|
|
extern struct linker_set sysctl_;
|
|
|
|
/*
|
|
* Initialization of the MIB tree.
|
|
*
|
|
* Order by number in each linker_set.
|
|
*/
|
|
|
|
static int
|
|
sysctl_order_cmp(const void *a, const void *b)
|
|
{
|
|
const struct sysctl_oid **pa, **pb;
|
|
|
|
pa = (const struct sysctl_oid **)a;
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|
pb = (const struct sysctl_oid **)b;
|
|
if (*pa == NULL)
|
|
return (1);
|
|
if (*pb == NULL)
|
|
return (-1);
|
|
return ((*pa)->oid_number - (*pb)->oid_number);
|
|
}
|
|
|
|
static void
|
|
sysctl_order(void *arg)
|
|
{
|
|
int j, k;
|
|
struct linker_set *l = (struct linker_set *) arg;
|
|
struct sysctl_oid **oidpp;
|
|
|
|
/* First, find the highest oid we have */
|
|
j = l->ls_length;
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|
oidpp = (struct sysctl_oid **) l->ls_items;
|
|
for (k = 0; j--; oidpp++) {
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|
if ((*oidpp)->oid_arg1 == arg) {
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|
*oidpp = 0;
|
|
continue;
|
|
}
|
|
if (*oidpp && (*oidpp)->oid_number > k)
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|
k = (*oidpp)->oid_number;
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|
}
|
|
|
|
/* Next, replace all OID_AUTO oids with new numbers */
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|
j = l->ls_length;
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|
oidpp = (struct sysctl_oid **) l->ls_items;
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|
k += 100;
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|
for (; j--; oidpp++)
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|
if (*oidpp && (*oidpp)->oid_number == OID_AUTO)
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(*oidpp)->oid_number = k++;
|
|
|
|
/* Finally: sort by oid */
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|
j = l->ls_length;
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|
oidpp = (struct sysctl_oid **) l->ls_items;
|
|
for (; j--; oidpp++) {
|
|
if (!*oidpp)
|
|
continue;
|
|
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE)
|
|
if (!(*oidpp)->oid_handler)
|
|
sysctl_order((*oidpp)->oid_arg1);
|
|
}
|
|
qsort(l->ls_items, l->ls_length, sizeof l->ls_items[0],
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|
sysctl_order_cmp);
|
|
}
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|
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|
SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_order, &sysctl_);
|
|
|
|
/*
|
|
* "Staff-functions"
|
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*
|
|
* These functions implement a presently undocumented interface
|
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* used by the sysctl program to walk the tree, and get the type
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|
* so it can print the value.
|
|
* This interface is under work and consideration, and should probably
|
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* be killed with a big axe by the first person who can find the time.
|
|
* (be aware though, that the proper interface isn't as obvious as it
|
|
* may seem, there are various conflicting requirements.
|
|
*
|
|
* {0,0} printf the entire MIB-tree.
|
|
* {0,1,...} return the name of the "..." OID.
|
|
* {0,2,...} return the next OID.
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|
* {0,3} return the OID of the name in "new"
|
|
* {0,4,...} return the kind & format info for the "..." OID.
|
|
*/
|
|
|
|
static void
|
|
sysctl_sysctl_debug_dump_node(struct linker_set *l, int i)
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|
{
|
|
int j, k;
|
|
struct sysctl_oid **oidpp;
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|
|
|
j = l->ls_length;
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|
oidpp = (struct sysctl_oid **) l->ls_items;
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|
for (; j--; oidpp++) {
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|
|
|
if (!*oidpp)
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|
continue;
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|
|
|
for (k=0; k<i; k++)
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printf(" ");
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|
|
|
printf("%d %s ", (*oidpp)->oid_number, (*oidpp)->oid_name);
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|
|
|
printf("%c%c",
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(*oidpp)->oid_kind & CTLFLAG_RD ? 'R':' ',
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|
(*oidpp)->oid_kind & CTLFLAG_WR ? 'W':' ');
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|
|
|
if ((*oidpp)->oid_handler)
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|
printf(" *Handler");
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|
|
|
switch ((*oidpp)->oid_kind & CTLTYPE) {
|
|
case CTLTYPE_NODE:
|
|
printf(" Node\n");
|
|
if (!(*oidpp)->oid_handler) {
|
|
sysctl_sysctl_debug_dump_node(
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(*oidpp)->oid_arg1, i+2);
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|
}
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|
break;
|
|
case CTLTYPE_INT: printf(" Int\n"); break;
|
|
case CTLTYPE_STRING: printf(" String\n"); break;
|
|
case CTLTYPE_QUAD: printf(" Quad\n"); break;
|
|
case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break;
|
|
default: printf("\n");
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
static int
|
|
sysctl_sysctl_debug SYSCTL_HANDLER_ARGS
|
|
{
|
|
sysctl_sysctl_debug_dump_node(&sysctl_, 0);
|
|
return ENOENT;
|
|
}
|
|
|
|
SYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD,
|
|
0, 0, sysctl_sysctl_debug, "-", "");
|
|
|
|
static int
|
|
sysctl_sysctl_name SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int *) arg1;
|
|
u_int namelen = arg2;
|
|
int i, j, error = 0;
|
|
struct sysctl_oid **oidpp;
|
|
struct linker_set *lsp = &sysctl_;
|
|
char buf[10];
|
|
|
|
while (namelen) {
|
|
if (!lsp) {
|
|
sprintf(buf,"%d",*name);
|
|
if (req->oldidx)
|
|
error = SYSCTL_OUT(req, ".", 1);
|
|
if (!error)
|
|
error = SYSCTL_OUT(req, buf, strlen(buf));
|
|
if (error)
|
|
return (error);
|
|
namelen--;
|
|
name++;
|
|
continue;
|
|
}
|
|
oidpp = (struct sysctl_oid **) lsp->ls_items;
|
|
j = lsp->ls_length;
|
|
lsp = 0;
|
|
for (i = 0; i < j; i++, oidpp++) {
|
|
if (*oidpp && ((*oidpp)->oid_number != *name))
|
|
continue;
|
|
|
|
if (req->oldidx)
|
|
error = SYSCTL_OUT(req, ".", 1);
|
|
if (!error)
|
|
error = SYSCTL_OUT(req, (*oidpp)->oid_name,
|
|
strlen((*oidpp)->oid_name));
|
|
if (error)
|
|
return (error);
|
|
|
|
namelen--;
|
|
name++;
|
|
|
|
if (((*oidpp)->oid_kind & CTLTYPE) != CTLTYPE_NODE)
|
|
break;
|
|
|
|
if ((*oidpp)->oid_handler)
|
|
break;
|
|
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
break;
|
|
}
|
|
}
|
|
return (SYSCTL_OUT(req, "", 1));
|
|
}
|
|
|
|
SYSCTL_NODE(_sysctl, 1, name, CTLFLAG_RD, sysctl_sysctl_name, "");
|
|
|
|
static int
|
|
sysctl_sysctl_next_ls (struct linker_set *lsp, int *name, u_int namelen,
|
|
int *next, int *len, int level, struct sysctl_oid **oidp)
|
|
{
|
|
int i, j;
|
|
struct sysctl_oid **oidpp;
|
|
|
|
oidpp = (struct sysctl_oid **) lsp->ls_items;
|
|
j = lsp->ls_length;
|
|
*len = level;
|
|
for (i = 0; i < j; i++, oidpp++) {
|
|
if (!*oidpp)
|
|
continue;
|
|
|
|
*next = (*oidpp)->oid_number;
|
|
*oidp = *oidpp;
|
|
|
|
if (!namelen) {
|
|
if (((*oidpp)->oid_kind & CTLTYPE) != CTLTYPE_NODE)
|
|
return 0;
|
|
if ((*oidpp)->oid_handler)
|
|
/* We really should call the handler here...*/
|
|
return 0;
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
if (!sysctl_sysctl_next_ls (lsp, 0, 0, next+1,
|
|
len, level+1, oidp))
|
|
return 0;
|
|
goto next;
|
|
}
|
|
|
|
if ((*oidpp)->oid_number < *name)
|
|
continue;
|
|
|
|
if ((*oidpp)->oid_number > *name) {
|
|
if (((*oidpp)->oid_kind & CTLTYPE) != CTLTYPE_NODE)
|
|
return 0;
|
|
if ((*oidpp)->oid_handler)
|
|
return 0;
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
if (!sysctl_sysctl_next_ls (lsp, name+1, namelen-1,
|
|
next+1, len, level+1, oidp))
|
|
return (0);
|
|
goto next;
|
|
}
|
|
if (((*oidpp)->oid_kind & CTLTYPE) != CTLTYPE_NODE)
|
|
continue;
|
|
|
|
if ((*oidpp)->oid_handler)
|
|
continue;
|
|
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
if (!sysctl_sysctl_next_ls (lsp, name+1, namelen-1, next+1,
|
|
len, level+1, oidp))
|
|
return (0);
|
|
next:
|
|
namelen = 1;
|
|
*len = level;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
sysctl_sysctl_next SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int *) arg1;
|
|
u_int namelen = arg2;
|
|
int i, j, error;
|
|
struct sysctl_oid *oid;
|
|
struct linker_set *lsp = &sysctl_;
|
|
int newoid[CTL_MAXNAME];
|
|
|
|
i = sysctl_sysctl_next_ls (lsp, name, namelen, newoid, &j, 1, &oid);
|
|
if (i)
|
|
return ENOENT;
|
|
error = SYSCTL_OUT(req, newoid, j * sizeof (int));
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_NODE(_sysctl, 2, next, CTLFLAG_RD, sysctl_sysctl_next, "");
|
|
|
|
static int
|
|
name2oid (char *name, int *oid, int *len, struct sysctl_oid **oidp)
|
|
{
|
|
int i, j;
|
|
struct sysctl_oid **oidpp;
|
|
struct linker_set *lsp = &sysctl_;
|
|
char *p;
|
|
|
|
if (!*name)
|
|
return ENOENT;
|
|
|
|
p = name + strlen(name) - 1 ;
|
|
if (*p == '.')
|
|
*p = '\0';
|
|
|
|
*len = 0;
|
|
|
|
for (p = name; *p && *p != '.'; p++)
|
|
;
|
|
i = *p;
|
|
if (i == '.')
|
|
*p = '\0';
|
|
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **) lsp->ls_items;
|
|
|
|
while (j-- && *len < CTL_MAXNAME) {
|
|
if (!*oidpp)
|
|
continue;
|
|
if (strcmp(name, (*oidpp)->oid_name)) {
|
|
oidpp++;
|
|
continue;
|
|
}
|
|
*oid++ = (*oidpp)->oid_number;
|
|
(*len)++;
|
|
|
|
if (!i) {
|
|
if (oidp)
|
|
*oidp = *oidpp;
|
|
return (0);
|
|
}
|
|
|
|
if (((*oidpp)->oid_kind & CTLTYPE) != CTLTYPE_NODE)
|
|
break;
|
|
|
|
if ((*oidpp)->oid_handler)
|
|
break;
|
|
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **)lsp->ls_items;
|
|
name = p+1;
|
|
for (p = name; *p && *p != '.'; p++)
|
|
;
|
|
i = *p;
|
|
if (i == '.')
|
|
*p = '\0';
|
|
}
|
|
return ENOENT;
|
|
}
|
|
|
|
static int
|
|
sysctl_sysctl_name2oid SYSCTL_HANDLER_ARGS
|
|
{
|
|
char *p;
|
|
int error, oid[CTL_MAXNAME], len;
|
|
struct sysctl_oid *op = 0;
|
|
|
|
if (!req->newlen)
|
|
return ENOENT;
|
|
|
|
p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK);
|
|
|
|
error = SYSCTL_IN(req, p, req->newlen);
|
|
if (error) {
|
|
free(p, M_SYSCTL);
|
|
return (error);
|
|
}
|
|
|
|
p [req->newlen] = '\0';
|
|
|
|
error = name2oid(p, oid, &len, &op);
|
|
|
|
free(p, M_SYSCTL);
|
|
|
|
if (error)
|
|
return (error);
|
|
|
|
error = SYSCTL_OUT(req, oid, len * sizeof *oid);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_sysctl, 3, name2oid, CTLFLAG_RW|CTLFLAG_ANYBODY, 0, 0,
|
|
sysctl_sysctl_name2oid, "I", "");
|
|
|
|
static int
|
|
sysctl_sysctl_oidfmt SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int *) arg1, error;
|
|
u_int namelen = arg2;
|
|
int indx, j;
|
|
struct sysctl_oid **oidpp;
|
|
struct linker_set *lsp = &sysctl_;
|
|
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **) lsp->ls_items;
|
|
|
|
indx = 0;
|
|
while (j-- && indx < CTL_MAXNAME) {
|
|
if (*oidpp && ((*oidpp)->oid_number == name[indx])) {
|
|
indx++;
|
|
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) {
|
|
if ((*oidpp)->oid_handler)
|
|
goto found;
|
|
if (indx == namelen)
|
|
goto found;
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **)lsp->ls_items;
|
|
} else {
|
|
if (indx != namelen)
|
|
return EISDIR;
|
|
goto found;
|
|
}
|
|
} else {
|
|
oidpp++;
|
|
}
|
|
}
|
|
return ENOENT;
|
|
found:
|
|
if (!(*oidpp)->oid_fmt)
|
|
return ENOENT;
|
|
error = SYSCTL_OUT(req,
|
|
&(*oidpp)->oid_kind, sizeof((*oidpp)->oid_kind));
|
|
if (!error)
|
|
error = SYSCTL_OUT(req, (*oidpp)->oid_fmt,
|
|
strlen((*oidpp)->oid_fmt)+1);
|
|
return (error);
|
|
}
|
|
|
|
|
|
SYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, "");
|
|
|
|
/*
|
|
* Default "handler" functions.
|
|
*/
|
|
|
|
/*
|
|
* Handle an integer, signed or unsigned.
|
|
* Two cases:
|
|
* a variable: point arg1 at it.
|
|
* a constant: pass it in arg2.
|
|
*/
|
|
|
|
int
|
|
sysctl_handle_int SYSCTL_HANDLER_ARGS
|
|
{
|
|
int error = 0;
|
|
|
|
if (arg1)
|
|
error = SYSCTL_OUT(req, arg1, sizeof(int));
|
|
else if (arg2)
|
|
error = SYSCTL_OUT(req, &arg2, sizeof(int));
|
|
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
|
|
if (!arg1)
|
|
error = EPERM;
|
|
else
|
|
error = SYSCTL_IN(req, arg1, sizeof(int));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Handle our generic '\0' terminated 'C' string.
|
|
* Two cases:
|
|
* a variable string: point arg1 at it, arg2 is max length.
|
|
* a constant string: point arg1 at it, arg2 is zero.
|
|
*/
|
|
|
|
int
|
|
sysctl_handle_string SYSCTL_HANDLER_ARGS
|
|
{
|
|
int error=0;
|
|
|
|
error = SYSCTL_OUT(req, arg1, strlen((char *)arg1)+1);
|
|
|
|
if (error || !req->newptr || !arg2)
|
|
return (error);
|
|
|
|
if ((req->newlen - req->newidx) > arg2) {
|
|
error = E2BIG;
|
|
} else {
|
|
arg2 = (req->newlen - req->newidx);
|
|
error = SYSCTL_IN(req, arg1, arg2);
|
|
((char *)arg1)[arg2] = '\0';
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Handle any kind of opaque data.
|
|
* arg1 points to it, arg2 is the size.
|
|
*/
|
|
|
|
int
|
|
sysctl_handle_opaque SYSCTL_HANDLER_ARGS
|
|
{
|
|
int error;
|
|
|
|
error = SYSCTL_OUT(req, arg1, arg2);
|
|
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
|
|
error = SYSCTL_IN(req, arg1, arg2);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Transfer functions to/from kernel space.
|
|
* XXX: rather untested at this point
|
|
*/
|
|
static int
|
|
sysctl_old_kernel(struct sysctl_req *req, const void *p, int l)
|
|
{
|
|
int i = 0;
|
|
|
|
if (req->oldptr) {
|
|
i = min(req->oldlen - req->oldidx, l);
|
|
if (i > 0)
|
|
bcopy(p, req->oldptr + req->oldidx, i);
|
|
}
|
|
req->oldidx += l;
|
|
if (req->oldptr && i != l)
|
|
return (ENOMEM);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_new_kernel(struct sysctl_req *req, void *p, int l)
|
|
{
|
|
if (!req->newptr)
|
|
return 0;
|
|
if (req->newlen - req->newidx < l)
|
|
return (EINVAL);
|
|
bcopy(req->newptr + req->newidx, p, l);
|
|
req->newidx += l;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
kernel_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, void *new, size_t newlen, int *retval)
|
|
{
|
|
int error = 0;
|
|
struct sysctl_req req;
|
|
|
|
bzero(&req, sizeof req);
|
|
|
|
req.p = p;
|
|
|
|
if (oldlenp) {
|
|
req.oldlen = *oldlenp;
|
|
}
|
|
|
|
if (old) {
|
|
req.oldptr= old;
|
|
}
|
|
|
|
if (newlen) {
|
|
req.newlen = newlen;
|
|
req.newptr = new;
|
|
}
|
|
|
|
req.oldfunc = sysctl_old_kernel;
|
|
req.newfunc = sysctl_new_kernel;
|
|
req.lock = 1;
|
|
|
|
/* XXX this should probably be done in a general way */
|
|
while (memlock.sl_lock) {
|
|
memlock.sl_want = 1;
|
|
(void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0);
|
|
memlock.sl_locked++;
|
|
}
|
|
memlock.sl_lock = 1;
|
|
|
|
error = sysctl_root(0, name, namelen, &req);
|
|
|
|
if (req.lock == 2)
|
|
vsunlock(req.oldptr, req.oldlen, B_WRITE);
|
|
|
|
memlock.sl_lock = 0;
|
|
|
|
if (memlock.sl_want) {
|
|
memlock.sl_want = 0;
|
|
wakeup((caddr_t)&memlock);
|
|
}
|
|
|
|
if (error && error != ENOMEM)
|
|
return (error);
|
|
|
|
if (retval) {
|
|
if (req.oldptr && req.oldidx > req.oldlen)
|
|
*retval = req.oldlen;
|
|
else
|
|
*retval = req.oldidx;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Transfer function to/from user space.
|
|
*/
|
|
static int
|
|
sysctl_old_user(struct sysctl_req *req, const void *p, int l)
|
|
{
|
|
int error = 0, i = 0;
|
|
|
|
if (req->lock == 1 && req->oldptr) {
|
|
vslock(req->oldptr, req->oldlen);
|
|
req->lock = 2;
|
|
}
|
|
if (req->oldptr) {
|
|
i = min(req->oldlen - req->oldidx, l);
|
|
if (i > 0)
|
|
error = copyout(p, req->oldptr + req->oldidx, i);
|
|
}
|
|
req->oldidx += l;
|
|
if (error)
|
|
return (error);
|
|
if (req->oldptr && i < l)
|
|
return (ENOMEM);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_new_user(struct sysctl_req *req, void *p, int l)
|
|
{
|
|
int error;
|
|
|
|
if (!req->newptr)
|
|
return 0;
|
|
if (req->newlen - req->newidx < l)
|
|
return (EINVAL);
|
|
error = copyin(req->newptr + req->newidx, p, l);
|
|
req->newidx += l;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Traverse our tree, and find the right node, execute whatever it points
|
|
* at, and return the resulting error code.
|
|
*/
|
|
|
|
int
|
|
sysctl_root SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int *) arg1;
|
|
u_int namelen = arg2;
|
|
int indx, i, j;
|
|
struct sysctl_oid **oidpp;
|
|
struct linker_set *lsp = &sysctl_;
|
|
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **) lsp->ls_items;
|
|
|
|
indx = 0;
|
|
while (j-- && indx < CTL_MAXNAME) {
|
|
if (*oidpp && ((*oidpp)->oid_number == name[indx])) {
|
|
indx++;
|
|
if ((*oidpp)->oid_kind & CTLFLAG_NOLOCK)
|
|
req->lock = 0;
|
|
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) {
|
|
if ((*oidpp)->oid_handler)
|
|
goto found;
|
|
if (indx == namelen)
|
|
return ENOENT;
|
|
lsp = (struct linker_set*)(*oidpp)->oid_arg1;
|
|
j = lsp->ls_length;
|
|
oidpp = (struct sysctl_oid **)lsp->ls_items;
|
|
} else {
|
|
if (indx != namelen)
|
|
return EISDIR;
|
|
goto found;
|
|
}
|
|
} else {
|
|
oidpp++;
|
|
}
|
|
}
|
|
return ENOENT;
|
|
found:
|
|
/* If writing isn't allowed */
|
|
if (req->newptr && !((*oidpp)->oid_kind & CTLFLAG_WR))
|
|
return (EPERM);
|
|
|
|
/* Most likely only root can write */
|
|
if (!((*oidpp)->oid_kind & CTLFLAG_ANYBODY) &&
|
|
req->newptr && req->p &&
|
|
(i = suser(req->p->p_ucred, &req->p->p_acflag)))
|
|
return (i);
|
|
|
|
if (!(*oidpp)->oid_handler)
|
|
return EINVAL;
|
|
|
|
if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) {
|
|
i = ((*oidpp)->oid_handler) (*oidpp,
|
|
name + indx, namelen - indx,
|
|
req);
|
|
} else {
|
|
i = ((*oidpp)->oid_handler) (*oidpp,
|
|
(*oidpp)->oid_arg1, (*oidpp)->oid_arg2,
|
|
req);
|
|
}
|
|
return (i);
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sysctl_args {
|
|
int *name;
|
|
u_int namelen;
|
|
void *old;
|
|
size_t *oldlenp;
|
|
void *new;
|
|
size_t newlen;
|
|
};
|
|
#endif
|
|
|
|
int
|
|
__sysctl(struct proc *p, struct sysctl_args *uap, int *retval)
|
|
{
|
|
int error, i, j, name[CTL_MAXNAME];
|
|
|
|
if (uap->namelen > CTL_MAXNAME || uap->namelen < 2)
|
|
return (EINVAL);
|
|
|
|
error = copyin(uap->name, &name, uap->namelen * sizeof(int));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = userland_sysctl(p, name, uap->namelen,
|
|
uap->old, uap->oldlenp, 0,
|
|
uap->new, uap->newlen, &j);
|
|
if (error && error != ENOMEM)
|
|
return (error);
|
|
if (uap->oldlenp) {
|
|
i = copyout(&j, uap->oldlenp, sizeof(j));
|
|
if (i)
|
|
return (i);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This is used from various compatibility syscalls too. That's why name
|
|
* must be in kernel space.
|
|
*/
|
|
int
|
|
userland_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen, int *retval)
|
|
{
|
|
int error = 0;
|
|
struct sysctl_req req, req2;
|
|
|
|
bzero(&req, sizeof req);
|
|
|
|
req.p = p;
|
|
|
|
if (oldlenp) {
|
|
if (inkernel) {
|
|
req.oldlen = *oldlenp;
|
|
} else {
|
|
error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
if (old) {
|
|
if (!useracc(old, req.oldlen, B_WRITE))
|
|
return (EFAULT);
|
|
req.oldptr= old;
|
|
}
|
|
|
|
if (newlen) {
|
|
if (!useracc(new, req.newlen, B_READ))
|
|
return (EFAULT);
|
|
req.newlen = newlen;
|
|
req.newptr = new;
|
|
}
|
|
|
|
req.oldfunc = sysctl_old_user;
|
|
req.newfunc = sysctl_new_user;
|
|
req.lock = 1;
|
|
|
|
/* XXX this should probably be done in a general way */
|
|
while (memlock.sl_lock) {
|
|
memlock.sl_want = 1;
|
|
(void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0);
|
|
memlock.sl_locked++;
|
|
}
|
|
memlock.sl_lock = 1;
|
|
|
|
do {
|
|
req2 = req;
|
|
error = sysctl_root(0, name, namelen, &req2);
|
|
} while (error == EAGAIN);
|
|
|
|
req = req2;
|
|
if (req.lock == 2)
|
|
vsunlock(req.oldptr, req.oldlen, B_WRITE);
|
|
|
|
memlock.sl_lock = 0;
|
|
|
|
if (memlock.sl_want) {
|
|
memlock.sl_want = 0;
|
|
wakeup((caddr_t)&memlock);
|
|
}
|
|
|
|
if (error && error != ENOMEM)
|
|
return (error);
|
|
|
|
if (retval) {
|
|
if (req.oldptr && req.oldidx > req.oldlen)
|
|
*retval = req.oldlen;
|
|
else
|
|
*retval = req.oldidx;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
#include <sys/socket.h>
|
|
#include <vm/vm_param.h>
|
|
|
|
#define KINFO_PROC (0<<8)
|
|
#define KINFO_RT (1<<8)
|
|
#define KINFO_VNODE (2<<8)
|
|
#define KINFO_FILE (3<<8)
|
|
#define KINFO_METER (4<<8)
|
|
#define KINFO_LOADAVG (5<<8)
|
|
#define KINFO_CLOCKRATE (6<<8)
|
|
|
|
/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */
|
|
#define KINFO_BSDI_SYSINFO (101<<8)
|
|
|
|
/*
|
|
* XXX this is bloat, but I hope it's better here than on the potentially
|
|
* limited kernel stack... -Peter
|
|
*/
|
|
|
|
static struct {
|
|
int bsdi_machine; /* "i386" on BSD/386 */
|
|
/* ^^^ this is an offset to the string, relative to the struct start */
|
|
char *pad0;
|
|
long pad1;
|
|
long pad2;
|
|
long pad3;
|
|
u_long pad4;
|
|
u_long pad5;
|
|
u_long pad6;
|
|
|
|
int bsdi_ostype; /* "BSD/386" on BSD/386 */
|
|
int bsdi_osrelease; /* "1.1" on BSD/386 */
|
|
long pad7;
|
|
long pad8;
|
|
char *pad9;
|
|
|
|
long pad10;
|
|
long pad11;
|
|
int pad12;
|
|
long pad13;
|
|
quad_t pad14;
|
|
long pad15;
|
|
|
|
struct timeval pad16;
|
|
/* we dont set this, because BSDI's uname used gethostname() instead */
|
|
int bsdi_hostname; /* hostname on BSD/386 */
|
|
|
|
/* the actual string data is appended here */
|
|
|
|
} bsdi_si;
|
|
/*
|
|
* this data is appended to the end of the bsdi_si structure during copyout.
|
|
* The "char *" offsets are relative to the base of the bsdi_si struct.
|
|
* This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings
|
|
* should not exceed the length of the buffer here... (or else!! :-)
|
|
*/
|
|
static char bsdi_strings[80]; /* It had better be less than this! */
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getkerninfo_args {
|
|
int op;
|
|
char *where;
|
|
int *size;
|
|
int arg;
|
|
};
|
|
#endif
|
|
|
|
int
|
|
ogetkerninfo(struct proc *p, struct getkerninfo_args *uap, int *retval)
|
|
{
|
|
int error, name[6];
|
|
u_int size;
|
|
|
|
switch (uap->op & 0xff00) {
|
|
|
|
case KINFO_RT:
|
|
name[0] = CTL_NET;
|
|
name[1] = PF_ROUTE;
|
|
name[2] = 0;
|
|
name[3] = (uap->op & 0xff0000) >> 16;
|
|
name[4] = uap->op & 0xff;
|
|
name[5] = uap->arg;
|
|
error = userland_sysctl(p, name, 6, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_VNODE:
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_VNODE;
|
|
error = userland_sysctl(p, name, 2, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_PROC:
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_PROC;
|
|
name[2] = uap->op & 0xff;
|
|
name[3] = uap->arg;
|
|
error = userland_sysctl(p, name, 4, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_FILE:
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_FILE;
|
|
error = userland_sysctl(p, name, 2, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_METER:
|
|
name[0] = CTL_VM;
|
|
name[1] = VM_METER;
|
|
error = userland_sysctl(p, name, 2, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_LOADAVG:
|
|
name[0] = CTL_VM;
|
|
name[1] = VM_LOADAVG;
|
|
error = userland_sysctl(p, name, 2, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_CLOCKRATE:
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_CLOCKRATE;
|
|
error = userland_sysctl(p, name, 2, uap->where, uap->size,
|
|
0, 0, 0, &size);
|
|
break;
|
|
|
|
case KINFO_BSDI_SYSINFO: {
|
|
/*
|
|
* this is pretty crude, but it's just enough for uname()
|
|
* from BSDI's 1.x libc to work.
|
|
*
|
|
* In particular, it doesn't return the same results when
|
|
* the supplied buffer is too small. BSDI's version apparently
|
|
* will return the amount copied, and set the *size to how
|
|
* much was needed. The emulation framework here isn't capable
|
|
* of that, so we just set both to the amount copied.
|
|
* BSDI's 2.x product apparently fails with ENOMEM in this
|
|
* scenario.
|
|
*/
|
|
|
|
u_int needed;
|
|
u_int left;
|
|
char *s;
|
|
|
|
bzero((char *)&bsdi_si, sizeof(bsdi_si));
|
|
bzero(bsdi_strings, sizeof(bsdi_strings));
|
|
|
|
s = bsdi_strings;
|
|
|
|
bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si);
|
|
strcpy(s, ostype);
|
|
s += strlen(s) + 1;
|
|
|
|
bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si);
|
|
strcpy(s, osrelease);
|
|
s += strlen(s) + 1;
|
|
|
|
bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si);
|
|
strcpy(s, machine);
|
|
s += strlen(s) + 1;
|
|
|
|
needed = sizeof(bsdi_si) + (s - bsdi_strings);
|
|
|
|
if (uap->where == NULL) {
|
|
/* process is asking how much buffer to supply.. */
|
|
size = needed;
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
|
|
/* if too much buffer supplied, trim it down */
|
|
if (size > needed)
|
|
size = needed;
|
|
|
|
/* how much of the buffer is remaining */
|
|
left = size;
|
|
|
|
if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0)
|
|
break;
|
|
|
|
/* is there any point in continuing? */
|
|
if (left > sizeof(bsdi_si)) {
|
|
left -= sizeof(bsdi_si);
|
|
error = copyout(&bsdi_strings,
|
|
uap->where + sizeof(bsdi_si), left);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
}
|
|
if (error)
|
|
return (error);
|
|
*retval = size;
|
|
if (uap->size)
|
|
error = copyout((caddr_t)&size, (caddr_t)uap->size,
|
|
sizeof(size));
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|