kern_mib.c revision 87275
115103Sphk/*- 215103Sphk * Copyright (c) 1982, 1986, 1989, 1993 315103Sphk * The Regents of the University of California. All rights reserved. 415103Sphk * 515103Sphk * This code is derived from software contributed to Berkeley by 615103Sphk * Mike Karels at Berkeley Software Design, Inc. 715103Sphk * 815103Sphk * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 915103Sphk * project, to make these variables more userfriendly. 1015103Sphk * 1115103Sphk * Redistribution and use in source and binary forms, with or without 1215103Sphk * modification, are permitted provided that the following conditions 1315103Sphk * are met: 1415103Sphk * 1. Redistributions of source code must retain the above copyright 1515103Sphk * notice, this list of conditions and the following disclaimer. 1615103Sphk * 2. Redistributions in binary form must reproduce the above copyright 1715103Sphk * notice, this list of conditions and the following disclaimer in the 1815103Sphk * documentation and/or other materials provided with the distribution. 1915103Sphk * 3. All advertising materials mentioning features or use of this software 2015103Sphk * must display the following acknowledgement: 2115103Sphk * This product includes software developed by the University of 2215103Sphk * California, Berkeley and its contributors. 2315103Sphk * 4. Neither the name of the University nor the names of its contributors 2415103Sphk * may be used to endorse or promote products derived from this software 2515103Sphk * without specific prior written permission. 2615103Sphk * 2715103Sphk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2815103Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2915103Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3015103Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3115103Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3215103Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3315103Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3415103Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3515103Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3615103Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3715103Sphk * SUCH DAMAGE. 3815103Sphk * 3915103Sphk * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 4050477Speter * $FreeBSD: head/sys/kern/kern_mib.c 87275 2001-12-03 16:12:27Z rwatson $ 4115103Sphk */ 4215103Sphk 4384611Srwatson#include "opt_global.h" 4486190Srwatson#include "opt_posix.h" 4584611Srwatson 4615103Sphk#include <sys/param.h> 4715103Sphk#include <sys/kernel.h> 4815103Sphk#include <sys/systm.h> 4915103Sphk#include <sys/sysctl.h> 5015103Sphk#include <sys/proc.h> 5187275Srwatson#include <sys/lock.h> 5287275Srwatson#include <sys/mutex.h> 5346155Sphk#include <sys/jail.h> 5476078Sjhb#include <sys/smp.h> 5528918Skato 5615103SphkSYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 5715103Sphk "Sysctl internal magic"); 5815103SphkSYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 5915103Sphk "High kernel, proc, limits &c"); 6015103SphkSYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 6115103Sphk "Virtual memory"); 6223382SbdeSYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, 6315103Sphk "File system"); 6415103SphkSYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 6515103Sphk "Network, (see socket.h)"); 6615103SphkSYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 6715103Sphk "Debugging"); 6848891SphkSYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 6948891Sphk "Sizeof various things"); 7015103SphkSYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 7115103Sphk "hardware"); 7215103SphkSYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 7315103Sphk "machine dependent"); 7415103SphkSYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 7515103Sphk "user-level"); 7634925SdufaultSYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 7734925Sdufault "p1003_1b, (see p1003_1b.h)"); 7834029Sdufault 7950465SmarcelSYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, 8050465Smarcel "Compatibility code"); 8186190Srwatson#ifdef REGRESSION 8286190SrwatsonSYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0, 8386190Srwatson "Regression test MIB"); 8486190Srwatson#endif 8550465Smarcel 8686189SrwatsonSYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, 8746381Sbillf osrelease, 0, "Operating system type"); 8815103Sphk 8986189SrwatsonSYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 9046381Sbillf 0, BSD, "Operating system revision"); 9115103Sphk 9286189SrwatsonSYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, 9346381Sbillf version, 0, "Kernel version"); 9415103Sphk 9586189SrwatsonSYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, 9646381Sbillf ostype, 0, "Operating system type"); 9715103Sphk 9815103Sphkextern int osreldate; 9986189SrwatsonSYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, 10046381Sbillf &osreldate, 0, "Operating system release date"); 10115103Sphk 10286189SrwatsonSYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, 10346381Sbillf &maxproc, 0, "Maximum number of processes"); 10415103Sphk 10586189SrwatsonSYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 10646381Sbillf &maxprocperuid, 0, "Maximum processes allowed per userid"); 10715103Sphk 10886189SrwatsonSYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD, 10980418Speter &maxusers, 0, "Hint for kernel tuning"); 11080418Speter 11186189SrwatsonSYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 11246381Sbillf 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); 11315103Sphk 11486189SrwatsonSYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 11546381Sbillf 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to"); 11615103Sphk 11786189SrwatsonSYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 11846381Sbillf 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); 11915103Sphk 12086189SrwatsonSYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 12146381Sbillf 0, 1, "Whether job control is available"); 12215103Sphk 12315103Sphk#ifdef _POSIX_SAVED_IDS 12486189SrwatsonSYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 12546381Sbillf 0, 1, "Whether saved set-group/user ID is available"); 12615103Sphk#else 12786189SrwatsonSYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 12846381Sbillf 0, 0, "Whether saved set-group/user ID is available"); 12915103Sphk#endif 13015103Sphk 13115103Sphkchar kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 13215103Sphk 13386189SrwatsonSYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 13446381Sbillf kernelname, sizeof kernelname, "Name of kernel file booted"); 13515103Sphk 13631990Sgpalmer#ifdef SMP 13786189SrwatsonSYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 13846381Sbillf &mp_ncpus, 0, "Number of active CPUs"); 13931990Sgpalmer#else 14086189SrwatsonSYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 14146381Sbillf 0, 1, "Number of active CPUs"); 14231990Sgpalmer#endif 14315103Sphk 14486189SrwatsonSYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 14546381Sbillf 0, BYTE_ORDER, "System byte order"); 14615103Sphk 14786189SrwatsonSYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 14846381Sbillf 0, PAGE_SIZE, "System memory page size"); 14915103Sphk 15028885Skatostatic char machine_arch[] = MACHINE_ARCH; 15128885SkatoSYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, 15246381Sbillf machine_arch, 0, "System architecture"); 15328885Skato 15415103Sphkchar hostname[MAXHOSTNAMELEN]; 15515103Sphk 15646155Sphkstatic int 15762573Sphksysctl_hostname(SYSCTL_HANDLER_ARGS) 15846155Sphk{ 15987072Srwatson struct prison *pr; 16087275Srwatson char tmphostname[MAXHOSTNAMELEN]; 16146155Sphk int error; 16215103Sphk 16387072Srwatson pr = req->td->td_proc->p_ucred->cr_prison; 16487072Srwatson if (pr != NULL) { 16557163Srwatson if (!jail_set_hostname_allowed && req->newptr) 16686190Srwatson return (EPERM); 16787275Srwatson /* 16887275Srwatson * Process is in jail, so make a local copy of jail 16987275Srwatson * hostname to get/set so we don't have to hold the jail 17087275Srwatson * mutex during the sysctl copyin/copyout activities. 17187275Srwatson */ 17287275Srwatson mtx_lock(&pr->pr_mtx); 17387275Srwatson bcopy(pr->pr_host, tmphostname, MAXHOSTNAMELEN); 17487275Srwatson mtx_unlock(&pr->pr_mtx); 17587275Srwatson 17687275Srwatson error = sysctl_handle_string(oidp, tmphostname, 17787072Srwatson sizeof pr->pr_host, req); 17887275Srwatson 17987275Srwatson if (req->newptr != NULL && error == 0) { 18087275Srwatson /* 18187275Srwatson * Copy the locally set hostname to the jail, if 18287275Srwatson * appropriate. 18387275Srwatson */ 18487275Srwatson mtx_lock(&pr->pr_mtx); 18587275Srwatson bcopy(tmphostname, pr->pr_host, MAXHOSTNAMELEN); 18687275Srwatson mtx_unlock(&pr->pr_mtx); 18787275Srwatson } 18857111Srwatson } else 18986189Srwatson error = sysctl_handle_string(oidp, 19046155Sphk hostname, sizeof hostname, req); 19146155Sphk return (error); 19246155Sphk} 19346155Sphk 19486189SrwatsonSYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 19546155Sphk CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, 19646381Sbillf 0, 0, sysctl_hostname, "A", "Hostname"); 19746155Sphk 19886190Srwatsonstatic int regression_securelevel_nonmonotonic = 0; 19984611Srwatson 20087072Srwatson#ifdef REGRESSION 20184611SrwatsonSYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 20284611Srwatson ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 20386190Srwatson#endif 20484611Srwatson 20515103Sphkint securelevel = -1; 20615103Sphk 20715103Sphkstatic int 20862573Sphksysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 20915103Sphk{ 21086145Srwatson struct prison *pr; 21186140Srwatson int error, level; 21215103Sphk 21386183Srwatson pr = req->td->td_proc->p_ucred->cr_prison; 21486145Srwatson 21586140Srwatson /* 21686140Srwatson * If the process is in jail, return the maximum of the global and 21786140Srwatson * local levels; otherwise, return the global level. 21886140Srwatson */ 21987275Srwatson if (pr != NULL) { 22087275Srwatson mtx_lock(&pr->pr_mtx); 22186145Srwatson level = imax(securelevel, pr->pr_securelevel); 22287275Srwatson mtx_unlock(&pr->pr_mtx); 22387275Srwatson } else 22486140Srwatson level = securelevel; 22586140Srwatson error = sysctl_handle_int(oidp, &level, 0, req); 22686140Srwatson if (error || !req->newptr) 22786140Srwatson return (error); 22886140Srwatson /* 22986140Srwatson * Permit update only if the new securelevel exceeds the 23086140Srwatson * global level, and local level if any. 23186140Srwatson */ 23286145Srwatson if (pr != NULL) { 23387275Srwatson mtx_lock(&pr->pr_mtx); 23487072Srwatson if (!regression_securelevel_nonmonotonic && 23587275Srwatson (level < imax(securelevel, pr->pr_securelevel))) { 23687275Srwatson mtx_unlock(&pr->pr_mtx); 23786140Srwatson return (EPERM); 23887275Srwatson } 23986145Srwatson pr->pr_securelevel = level; 24087275Srwatson mtx_unlock(&pr->pr_mtx); 24186140Srwatson } else { 24287072Srwatson if (!regression_securelevel_nonmonotonic && 24387072Srwatson (level < securelevel)) 24486140Srwatson return (EPERM); 24586140Srwatson securelevel = level; 24686140Srwatson } 24786140Srwatson return (error); 24815103Sphk} 24915103Sphk 25083990SrwatsonSYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 25183990Srwatson CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 25283990Srwatson "I", "Current secure level"); 25361370Srwatson 25415103Sphkchar domainname[MAXHOSTNAMELEN]; 25517281SwollmanSYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, 25646381Sbillf &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); 25715103Sphk 25886190Srwatsonu_long hostid; 25978609SpirzykSYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); 26015103Sphk 26115103Sphk/* 26215103Sphk * This is really cheating. These actually live in the libc, something 26386189Srwatson * which I'm not quite sure is a good idea anyway, but in order for 26415103Sphk * getnext and friends to actually work, we define dummies here. 26515103Sphk */ 26686189SrwatsonSYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 26746381Sbillf "", 0, "PATH that finds all the standard utilities"); 26886189SrwatsonSYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 26946381Sbillf 0, 0, "Max ibase/obase values in bc(1)"); 27086189SrwatsonSYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 27146381Sbillf 0, 0, "Max array size in bc(1)"); 27286189SrwatsonSYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 27346381Sbillf 0, 0, "Max scale value in bc(1)"); 27486189SrwatsonSYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 27546381Sbillf 0, 0, "Max string length in bc(1)"); 27686189SrwatsonSYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 27746381Sbillf 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 27818540SbdeSYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 27986189SrwatsonSYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 28046381Sbillf 0, 0, "Max length (bytes) of a text-processing utility's input line"); 28186189SrwatsonSYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 28246381Sbillf 0, 0, "Maximum number of repeats of a regexp permitted"); 28386189SrwatsonSYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 28486189Srwatson 0, 0, 28546381Sbillf "The version of POSIX 1003.2 with which the system attempts to comply"); 28686189SrwatsonSYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 28746381Sbillf 0, 0, "Whether C development supports the C bindings option"); 28886189SrwatsonSYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 28946381Sbillf 0, 0, "Whether system supports the C development utilities option"); 29086189SrwatsonSYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 29146381Sbillf 0, 0, ""); 29286189SrwatsonSYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 29346381Sbillf 0, 0, "Whether system supports FORTRAN development utilities"); 29486189SrwatsonSYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 29546381Sbillf 0, 0, "Whether system supports FORTRAN runtime utilities"); 29686189SrwatsonSYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 29746381Sbillf 0, 0, "Whether system supports creation of locales"); 29886189SrwatsonSYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 29946381Sbillf 0, 0, "Whether system supports software development utilities"); 30086189SrwatsonSYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 30146381Sbillf 0, 0, "Whether system supports the user portability utilities"); 30286189SrwatsonSYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 30346381Sbillf 0, 0, "Min Maximum number of streams a process may have open at one time"); 30486189SrwatsonSYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 30546381Sbillf 0, 0, "Min Maximum number of types supported for timezone names"); 30648891Sphk 30748891Sphk#include <sys/vnode.h> 30886189SrwatsonSYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 30948891Sphk 0, sizeof(struct vnode), "sizeof(struct vnode)"); 31048891Sphk 31186189SrwatsonSYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 31248891Sphk 0, sizeof(struct proc), "sizeof(struct proc)"); 31348927Sphk 31449535Sphk#include <sys/conf.h> 31548927SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD, 31648927Sphk 0, sizeof(struct specinfo), "sizeof(struct specinfo)"); 31758926Sphk 31860041Sphk#include <sys/bio.h> 31958926Sphk#include <sys/buf.h> 32058926SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 32158926Sphk 0, sizeof(struct bio), "sizeof(struct bio)"); 32258926SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 32358926Sphk 0, sizeof(struct buf), "sizeof(struct buf)"); 32472376Sjake 32572376Sjake#include <sys/user.h> 32672376SjakeSYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 32772376Sjake 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 328