mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-19 10:53:58 +00:00
c175d2226f
'regression.*'. o Add 'regression.securelevel_nonmonotonic', conditional on 'options REGRESSION', which allows the securelevel to be lowered for the purposes of efficient regression testing of securelevel policy decisions. Regression tests for securelevels will be committed shortly. NOTE: 'options REGRESSION' should never be used on production machines, as it permits violation of system invariants so as to improve the ability to effectively test edge cases, and improve testing efficiency.
302 lines
11 KiB
C
302 lines
11 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Mike Karels at Berkeley Software Design, Inc.
|
|
*
|
|
* Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
|
|
* project, to make these variables more userfriendly.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_global.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/jail.h>
|
|
#include <sys/smp.h>
|
|
|
|
SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
|
|
"Sysctl internal magic");
|
|
SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0,
|
|
"High kernel, proc, limits &c");
|
|
SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
|
|
"Virtual memory");
|
|
SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0,
|
|
"File system");
|
|
SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
|
|
"Network, (see socket.h)");
|
|
SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
|
|
"Debugging");
|
|
SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
|
|
"Sizeof various things");
|
|
SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
|
|
"hardware");
|
|
SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
|
|
"machine dependent");
|
|
SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
|
|
"user-level");
|
|
SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
|
|
"p1003_1b, (see p1003_1b.h)");
|
|
|
|
SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
|
|
"Compatibility code");
|
|
|
|
SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
|
|
osrelease, 0, "Operating system type");
|
|
|
|
SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
|
|
0, BSD, "Operating system revision");
|
|
|
|
SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
|
|
version, 0, "Kernel version");
|
|
|
|
SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
|
|
ostype, 0, "Operating system type");
|
|
|
|
extern int osreldate;
|
|
SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
|
|
&osreldate, 0, "Operating system release date");
|
|
|
|
SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD,
|
|
&maxproc, 0, "Maximum number of processes");
|
|
|
|
SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
|
|
&maxprocperuid, 0, "Maximum processes allowed per userid");
|
|
|
|
SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD,
|
|
&maxusers, 0, "Hint for kernel tuning");
|
|
|
|
SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
|
|
0, ARG_MAX, "Maximum bytes of argument to execve(2)");
|
|
|
|
SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
|
|
0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to");
|
|
|
|
SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
|
|
0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
|
|
|
|
SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
|
|
0, 1, "Whether job control is available");
|
|
|
|
#ifdef _POSIX_SAVED_IDS
|
|
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
|
|
0, 1, "Whether saved set-group/user ID is available");
|
|
#else
|
|
SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
|
|
0, 0, "Whether saved set-group/user ID is available");
|
|
#endif
|
|
|
|
char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
|
|
|
|
SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
|
|
kernelname, sizeof kernelname, "Name of kernel file booted");
|
|
|
|
#ifdef SMP
|
|
SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
|
|
&mp_ncpus, 0, "Number of active CPUs");
|
|
#else
|
|
SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
|
|
0, 1, "Number of active CPUs");
|
|
#endif
|
|
|
|
SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
|
|
0, BYTE_ORDER, "System byte order");
|
|
|
|
SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
|
|
0, PAGE_SIZE, "System memory page size");
|
|
|
|
static char machine_arch[] = MACHINE_ARCH;
|
|
SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
|
|
machine_arch, 0, "System architecture");
|
|
|
|
#ifdef REGRESSION
|
|
SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0, "Regression test MIB");
|
|
#endif /* !REGRESSION */
|
|
|
|
char hostname[MAXHOSTNAMELEN];
|
|
|
|
static int
|
|
sysctl_hostname(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
|
|
if (jailed(req->p->p_ucred)) {
|
|
if (!jail_set_hostname_allowed && req->newptr)
|
|
return(EPERM);
|
|
error = sysctl_handle_string(oidp,
|
|
req->p->p_ucred->cr_prison->pr_host,
|
|
sizeof req->p->p_ucred->cr_prison->pr_host, req);
|
|
} else
|
|
error = sysctl_handle_string(oidp,
|
|
hostname, sizeof hostname, req);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
|
|
CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
|
|
0, 0, sysctl_hostname, "A", "Hostname");
|
|
|
|
#ifdef REGRESSION
|
|
int regression_securelevel_nonmonotonic=0;
|
|
|
|
SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
|
|
®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
|
|
#endif /* !REGRESSION */
|
|
|
|
int securelevel = -1;
|
|
|
|
static int
|
|
sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error, level;
|
|
|
|
/*
|
|
* If the process is in jail, return the maximum of the
|
|
* global and local levels; otherwise, return the global
|
|
* level.
|
|
*/
|
|
if (req->p->p_ucred->cr_prison != NULL)
|
|
level = imax(securelevel,
|
|
req->p->p_ucred->cr_prison->pr_securelevel);
|
|
else
|
|
level = securelevel;
|
|
error = sysctl_handle_int(oidp, &level, 0, req);
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
/*
|
|
* Permit update only if the new securelevel exceeds the
|
|
* global level, and local level if any.
|
|
*/
|
|
if (req->p->p_ucred->cr_prison != NULL) {
|
|
#ifdef REGRESSION
|
|
if (!regression_securelevel_nonmonotonic)
|
|
#endif /* !REGRESSION */
|
|
if (level < imax(securelevel,
|
|
req->p->p_ucred->cr_prison->pr_securelevel))
|
|
return (EPERM);
|
|
req->p->p_ucred->cr_prison->pr_securelevel = level;
|
|
} else {
|
|
#ifdef REGRESSION
|
|
if (!regression_securelevel_nonmonotonic)
|
|
#endif /* !REGRESSION */
|
|
if (level < securelevel)
|
|
return (EPERM);
|
|
securelevel = level;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
|
|
CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
|
|
"I", "Current secure level");
|
|
|
|
char domainname[MAXHOSTNAMELEN];
|
|
SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
|
|
&domainname, sizeof(domainname), "Name of the current YP/NIS domain");
|
|
|
|
unsigned long hostid;
|
|
SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
|
|
|
|
/*
|
|
* This is really cheating. These actually live in the libc, something
|
|
* which I'm not quite sure is a good idea anyway, but in order for
|
|
* getnext and friends to actually work, we define dummies here.
|
|
*/
|
|
SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
|
|
"", 0, "PATH that finds all the standard utilities");
|
|
SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
|
|
0, 0, "Max ibase/obase values in bc(1)");
|
|
SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
|
|
0, 0, "Max array size in bc(1)");
|
|
SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
|
|
0, 0, "Max scale value in bc(1)");
|
|
SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
|
|
0, 0, "Max string length in bc(1)");
|
|
SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
|
|
0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
|
|
SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
|
|
SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
|
|
0, 0, "Max length (bytes) of a text-processing utility's input line");
|
|
SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
|
|
0, 0, "Maximum number of repeats of a regexp permitted");
|
|
SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
|
|
0, 0,
|
|
"The version of POSIX 1003.2 with which the system attempts to comply");
|
|
SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
|
|
0, 0, "Whether C development supports the C bindings option");
|
|
SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
|
|
0, 0, "Whether system supports the C development utilities option");
|
|
SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
|
|
0, 0, "");
|
|
SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
|
|
0, 0, "Whether system supports FORTRAN development utilities");
|
|
SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
|
|
0, 0, "Whether system supports FORTRAN runtime utilities");
|
|
SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
|
|
0, 0, "Whether system supports creation of locales");
|
|
SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
|
|
0, 0, "Whether system supports software development utilities");
|
|
SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
|
|
0, 0, "Whether system supports the user portability utilities");
|
|
SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
|
|
0, 0, "Min Maximum number of streams a process may have open at one time");
|
|
SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
|
|
0, 0, "Min Maximum number of types supported for timezone names");
|
|
|
|
#include <sys/vnode.h>
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
|
|
0, sizeof(struct vnode), "sizeof(struct vnode)");
|
|
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
|
|
0, sizeof(struct proc), "sizeof(struct proc)");
|
|
|
|
#include <sys/conf.h>
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD,
|
|
0, sizeof(struct specinfo), "sizeof(struct specinfo)");
|
|
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
|
|
0, sizeof(struct bio), "sizeof(struct bio)");
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
|
|
0, sizeof(struct buf), "sizeof(struct buf)");
|
|
|
|
#include <sys/user.h>
|
|
SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
|
|
0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
|