kern_mib.c revision 91406
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 91406 2002-02-27 18:32:23Z jhb $ 4115103Sphk */ 4215103Sphk 4386190Srwatson#include "opt_posix.h" 4484611Srwatson 4515103Sphk#include <sys/param.h> 4615103Sphk#include <sys/kernel.h> 4715103Sphk#include <sys/systm.h> 4815103Sphk#include <sys/sysctl.h> 4915103Sphk#include <sys/proc.h> 5087275Srwatson#include <sys/lock.h> 5187275Srwatson#include <sys/mutex.h> 5246155Sphk#include <sys/jail.h> 5376078Sjhb#include <sys/smp.h> 5428918Skato 5515103SphkSYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 5615103Sphk "Sysctl internal magic"); 5715103SphkSYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 5815103Sphk "High kernel, proc, limits &c"); 5915103SphkSYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 6015103Sphk "Virtual memory"); 6123382SbdeSYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, 6215103Sphk "File system"); 6315103SphkSYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 6415103Sphk "Network, (see socket.h)"); 6515103SphkSYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 6615103Sphk "Debugging"); 6748891SphkSYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 6848891Sphk "Sizeof various things"); 6915103SphkSYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 7015103Sphk "hardware"); 7115103SphkSYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 7215103Sphk "machine dependent"); 7315103SphkSYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 7415103Sphk "user-level"); 7534925SdufaultSYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 7634925Sdufault "p1003_1b, (see p1003_1b.h)"); 7734029Sdufault 7850465SmarcelSYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, 7950465Smarcel "Compatibility code"); 8089414SarrSYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0, 8189414Sarr "Security"); 8286190Srwatson#ifdef REGRESSION 8386190SrwatsonSYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0, 8486190Srwatson "Regression test MIB"); 8586190Srwatson#endif 8650465Smarcel 8786189SrwatsonSYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, 8888019Sluigi osrelease, 0, "Operating system release"); 8915103Sphk 9086189SrwatsonSYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 9146381Sbillf 0, BSD, "Operating system revision"); 9215103Sphk 9386189SrwatsonSYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, 9446381Sbillf version, 0, "Kernel version"); 9515103Sphk 9686189SrwatsonSYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, 9746381Sbillf ostype, 0, "Operating system type"); 9815103Sphk 9915103Sphkextern int osreldate; 10086189SrwatsonSYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, 10146381Sbillf &osreldate, 0, "Operating system release date"); 10215103Sphk 10386189SrwatsonSYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, 10446381Sbillf &maxproc, 0, "Maximum number of processes"); 10515103Sphk 10686189SrwatsonSYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 10746381Sbillf &maxprocperuid, 0, "Maximum processes allowed per userid"); 10815103Sphk 10986189SrwatsonSYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD, 11080418Speter &maxusers, 0, "Hint for kernel tuning"); 11180418Speter 11286189SrwatsonSYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 11346381Sbillf 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); 11415103Sphk 11586189SrwatsonSYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 11646381Sbillf 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to"); 11715103Sphk 11886189SrwatsonSYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 11946381Sbillf 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); 12015103Sphk 12186189SrwatsonSYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 12246381Sbillf 0, 1, "Whether job control is available"); 12315103Sphk 12415103Sphk#ifdef _POSIX_SAVED_IDS 12586189SrwatsonSYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 12646381Sbillf 0, 1, "Whether saved set-group/user ID is available"); 12715103Sphk#else 12886189SrwatsonSYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 12946381Sbillf 0, 0, "Whether saved set-group/user ID is available"); 13015103Sphk#endif 13115103Sphk 13215103Sphkchar kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 13315103Sphk 13486189SrwatsonSYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 13546381Sbillf kernelname, sizeof kernelname, "Name of kernel file booted"); 13615103Sphk 13731990Sgpalmer#ifdef SMP 13886189SrwatsonSYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 13946381Sbillf &mp_ncpus, 0, "Number of active CPUs"); 14031990Sgpalmer#else 14186189SrwatsonSYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 14246381Sbillf 0, 1, "Number of active CPUs"); 14331990Sgpalmer#endif 14415103Sphk 14586189SrwatsonSYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 14646381Sbillf 0, BYTE_ORDER, "System byte order"); 14715103Sphk 14886189SrwatsonSYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 14946381Sbillf 0, PAGE_SIZE, "System memory page size"); 15015103Sphk 15128885Skatostatic char machine_arch[] = MACHINE_ARCH; 15228885SkatoSYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, 15346381Sbillf machine_arch, 0, "System architecture"); 15428885Skato 15515103Sphkchar hostname[MAXHOSTNAMELEN]; 15615103Sphk 15746155Sphkstatic int 15862573Sphksysctl_hostname(SYSCTL_HANDLER_ARGS) 15946155Sphk{ 16087072Srwatson struct prison *pr; 16187275Srwatson char tmphostname[MAXHOSTNAMELEN]; 16246155Sphk int error; 16315103Sphk 16491406Sjhb pr = req->td->td_ucred->cr_prison; 16587072Srwatson if (pr != NULL) { 16657163Srwatson if (!jail_set_hostname_allowed && req->newptr) 16786190Srwatson return (EPERM); 16887275Srwatson /* 16987275Srwatson * Process is in jail, so make a local copy of jail 17087275Srwatson * hostname to get/set so we don't have to hold the jail 17187275Srwatson * mutex during the sysctl copyin/copyout activities. 17287275Srwatson */ 17387275Srwatson mtx_lock(&pr->pr_mtx); 17487275Srwatson bcopy(pr->pr_host, tmphostname, MAXHOSTNAMELEN); 17587275Srwatson mtx_unlock(&pr->pr_mtx); 17687275Srwatson 17787275Srwatson error = sysctl_handle_string(oidp, tmphostname, 17887072Srwatson sizeof pr->pr_host, req); 17987275Srwatson 18087275Srwatson if (req->newptr != NULL && error == 0) { 18187275Srwatson /* 18287275Srwatson * Copy the locally set hostname to the jail, if 18387275Srwatson * appropriate. 18487275Srwatson */ 18587275Srwatson mtx_lock(&pr->pr_mtx); 18687275Srwatson bcopy(tmphostname, pr->pr_host, MAXHOSTNAMELEN); 18787275Srwatson mtx_unlock(&pr->pr_mtx); 18887275Srwatson } 18957111Srwatson } else 19086189Srwatson error = sysctl_handle_string(oidp, 19146155Sphk hostname, sizeof hostname, req); 19246155Sphk return (error); 19346155Sphk} 19446155Sphk 19586189SrwatsonSYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 19646155Sphk CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, 19746381Sbillf 0, 0, sysctl_hostname, "A", "Hostname"); 19846155Sphk 19986190Srwatsonstatic int regression_securelevel_nonmonotonic = 0; 20084611Srwatson 20187072Srwatson#ifdef REGRESSION 20284611SrwatsonSYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 20384611Srwatson ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 20486190Srwatson#endif 20584611Srwatson 20615103Sphkint securelevel = -1; 20715103Sphk 20815103Sphkstatic int 20962573Sphksysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 21015103Sphk{ 21186145Srwatson struct prison *pr; 21286140Srwatson int error, level; 21315103Sphk 21491406Sjhb pr = req->td->td_ucred->cr_prison; 21586145Srwatson 21686140Srwatson /* 21786140Srwatson * If the process is in jail, return the maximum of the global and 21886140Srwatson * local levels; otherwise, return the global level. 21986140Srwatson */ 22087275Srwatson if (pr != NULL) { 22187275Srwatson mtx_lock(&pr->pr_mtx); 22286145Srwatson level = imax(securelevel, pr->pr_securelevel); 22387275Srwatson mtx_unlock(&pr->pr_mtx); 22487275Srwatson } else 22586140Srwatson level = securelevel; 22686140Srwatson error = sysctl_handle_int(oidp, &level, 0, req); 22786140Srwatson if (error || !req->newptr) 22886140Srwatson return (error); 22986140Srwatson /* 23086140Srwatson * Permit update only if the new securelevel exceeds the 23186140Srwatson * global level, and local level if any. 23286140Srwatson */ 23386145Srwatson if (pr != NULL) { 23487275Srwatson mtx_lock(&pr->pr_mtx); 23587072Srwatson if (!regression_securelevel_nonmonotonic && 23687275Srwatson (level < imax(securelevel, pr->pr_securelevel))) { 23787275Srwatson mtx_unlock(&pr->pr_mtx); 23886140Srwatson return (EPERM); 23987275Srwatson } 24086145Srwatson pr->pr_securelevel = level; 24187275Srwatson mtx_unlock(&pr->pr_mtx); 24286140Srwatson } else { 24387072Srwatson if (!regression_securelevel_nonmonotonic && 24487072Srwatson (level < securelevel)) 24586140Srwatson return (EPERM); 24686140Srwatson securelevel = level; 24786140Srwatson } 24886140Srwatson return (error); 24915103Sphk} 25015103Sphk 25183990SrwatsonSYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 25283990Srwatson CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 25383990Srwatson "I", "Current secure level"); 25461370Srwatson 25515103Sphkchar domainname[MAXHOSTNAMELEN]; 25617281SwollmanSYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, 25746381Sbillf &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); 25815103Sphk 25986190Srwatsonu_long hostid; 26078609SpirzykSYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); 26115103Sphk 26215103Sphk/* 26315103Sphk * This is really cheating. These actually live in the libc, something 26486189Srwatson * which I'm not quite sure is a good idea anyway, but in order for 26515103Sphk * getnext and friends to actually work, we define dummies here. 26615103Sphk */ 26786189SrwatsonSYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 26846381Sbillf "", 0, "PATH that finds all the standard utilities"); 26986189SrwatsonSYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 27046381Sbillf 0, 0, "Max ibase/obase values in bc(1)"); 27186189SrwatsonSYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 27246381Sbillf 0, 0, "Max array size in bc(1)"); 27386189SrwatsonSYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 27446381Sbillf 0, 0, "Max scale value in bc(1)"); 27586189SrwatsonSYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 27646381Sbillf 0, 0, "Max string length in bc(1)"); 27786189SrwatsonSYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 27846381Sbillf 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 27918540SbdeSYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 28086189SrwatsonSYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 28146381Sbillf 0, 0, "Max length (bytes) of a text-processing utility's input line"); 28286189SrwatsonSYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 28346381Sbillf 0, 0, "Maximum number of repeats of a regexp permitted"); 28486189SrwatsonSYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 28586189Srwatson 0, 0, 28646381Sbillf "The version of POSIX 1003.2 with which the system attempts to comply"); 28786189SrwatsonSYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 28846381Sbillf 0, 0, "Whether C development supports the C bindings option"); 28986189SrwatsonSYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 29046381Sbillf 0, 0, "Whether system supports the C development utilities option"); 29186189SrwatsonSYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 29246381Sbillf 0, 0, ""); 29386189SrwatsonSYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 29446381Sbillf 0, 0, "Whether system supports FORTRAN development utilities"); 29586189SrwatsonSYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 29646381Sbillf 0, 0, "Whether system supports FORTRAN runtime utilities"); 29786189SrwatsonSYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 29846381Sbillf 0, 0, "Whether system supports creation of locales"); 29986189SrwatsonSYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 30046381Sbillf 0, 0, "Whether system supports software development utilities"); 30186189SrwatsonSYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 30246381Sbillf 0, 0, "Whether system supports the user portability utilities"); 30386189SrwatsonSYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 30446381Sbillf 0, 0, "Min Maximum number of streams a process may have open at one time"); 30586189SrwatsonSYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 30646381Sbillf 0, 0, "Min Maximum number of types supported for timezone names"); 30748891Sphk 30848891Sphk#include <sys/vnode.h> 30986189SrwatsonSYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 31048891Sphk 0, sizeof(struct vnode), "sizeof(struct vnode)"); 31148891Sphk 31286189SrwatsonSYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 31348891Sphk 0, sizeof(struct proc), "sizeof(struct proc)"); 31448927Sphk 31549535Sphk#include <sys/conf.h> 31648927SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD, 31748927Sphk 0, sizeof(struct specinfo), "sizeof(struct specinfo)"); 31858926Sphk 31960041Sphk#include <sys/bio.h> 32058926Sphk#include <sys/buf.h> 32158926SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 32258926Sphk 0, sizeof(struct bio), "sizeof(struct bio)"); 32358926SphkSYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 32458926Sphk 0, sizeof(struct buf), "sizeof(struct buf)"); 32572376Sjake 32672376Sjake#include <sys/user.h> 32772376SjakeSYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 32872376Sjake 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 329