The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_mib.c

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Mike Karels at Berkeley Software Design, Inc.
    7  *
    8  * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
    9  * project, to make these variables more userfriendly.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 4. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  *      @(#)kern_sysctl.c       8.4 (Berkeley) 4/14/94
   36  */
   37 
   38 #include <sys/cdefs.h>
   39 __FBSDID("$FreeBSD: releng/8.1/sys/kern/kern_mib.c 204293 2010-02-24 22:16:16Z brooks $");
   40 
   41 #include "opt_compat.h"
   42 #include "opt_posix.h"
   43 #include "opt_config.h"
   44 
   45 #include <sys/param.h>
   46 #include <sys/kernel.h>
   47 #include <sys/sbuf.h>
   48 #include <sys/systm.h>
   49 #include <sys/sysctl.h>
   50 #include <sys/proc.h>
   51 #include <sys/lock.h>
   52 #include <sys/mutex.h>
   53 #include <sys/jail.h>
   54 #include <sys/smp.h>
   55 #include <sys/sx.h>
   56 #include <sys/unistd.h>
   57 
   58 SYSCTL_NODE(, 0,          sysctl, CTLFLAG_RW, 0,
   59         "Sysctl internal magic");
   60 SYSCTL_NODE(, CTL_KERN,   kern,   CTLFLAG_RW, 0,
   61         "High kernel, proc, limits &c");
   62 SYSCTL_NODE(, CTL_VM,     vm,     CTLFLAG_RW, 0,
   63         "Virtual memory");
   64 SYSCTL_NODE(, CTL_VFS,    vfs,     CTLFLAG_RW, 0,
   65         "File system");
   66 SYSCTL_NODE(, CTL_NET,    net,    CTLFLAG_RW, 0,
   67         "Network, (see socket.h)");
   68 SYSCTL_NODE(, CTL_DEBUG,  debug,  CTLFLAG_RW, 0,
   69         "Debugging");
   70 SYSCTL_NODE(_debug, OID_AUTO,  sizeof,  CTLFLAG_RW, 0,
   71         "Sizeof various things");
   72 SYSCTL_NODE(, CTL_HW,     hw,     CTLFLAG_RW, 0,
   73         "hardware");
   74 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
   75         "machine dependent");
   76 SYSCTL_NODE(, CTL_USER,   user,   CTLFLAG_RW, 0,
   77         "user-level");
   78 SYSCTL_NODE(, CTL_P1003_1B,  p1003_1b,   CTLFLAG_RW, 0,
   79         "p1003_1b, (see p1003_1b.h)");
   80 
   81 SYSCTL_NODE(, OID_AUTO,  compat, CTLFLAG_RW, 0,
   82         "Compatibility code");
   83 SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0, 
   84         "Security");
   85 #ifdef REGRESSION
   86 SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0,
   87      "Regression test MIB");
   88 #endif
   89 
   90 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
   91     kern_ident, 0, "Kernel identifier");
   92 
   93 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD|CTLFLAG_MPSAFE,
   94     osrelease, 0, "Operating system release");
   95 
   96 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
   97     0, BSD, "Operating system revision");
   98 
   99 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
  100     version, 0, "Kernel version");
  101 
  102 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE,
  103     ostype, 0, "Operating system type");
  104 
  105 /*
  106  * NOTICE: The *userland* release date is available in
  107  * /usr/include/osreldate.h
  108  */
  109 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
  110     &osreldate, 0, "Kernel release date");
  111 
  112 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN,
  113     &maxproc, 0, "Maximum number of processes");
  114 
  115 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
  116     &maxprocperuid, 0, "Maximum processes allowed per userid");
  117 
  118 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN,
  119     &maxusers, 0, "Hint for kernel tuning");
  120 
  121 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
  122     0, ARG_MAX, "Maximum bytes of argument to execve(2)");
  123 
  124 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
  125     0, _POSIX_VERSION, "Version of POSIX attempting to comply to");
  126 
  127 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN,
  128     &ngroups_max, 0,
  129     "Maximum number of supplemental groups a user can belong to");
  130 
  131 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
  132     0, 1, "Whether job control is available");
  133 
  134 #ifdef _POSIX_SAVED_IDS
  135 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
  136     0, 1, "Whether saved set-group/user ID is available");
  137 #else
  138 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
  139     0, 0, "Whether saved set-group/user ID is available");
  140 #endif
  141 
  142 char kernelname[MAXPATHLEN] = "/kernel";        /* XXX bloat */
  143 
  144 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
  145     kernelname, sizeof kernelname, "Name of kernel file booted");
  146 
  147 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
  148     &mp_ncpus, 0, "Number of active CPUs");
  149 
  150 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
  151     0, BYTE_ORDER, "System byte order");
  152 
  153 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
  154     0, PAGE_SIZE, "System memory page size");
  155 
  156 static int
  157 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
  158 {
  159         char buf[256];
  160         size_t len;
  161 
  162         len = req->oldlen;
  163         if (len > sizeof(buf))
  164                 len = sizeof(buf);
  165         arc4rand(buf, len, 0);
  166         return (SYSCTL_OUT(req, buf, len));
  167 }
  168 
  169 SYSCTL_PROC(_kern, KERN_ARND, arandom,
  170     CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
  171     sysctl_kern_arnd, "", "arc4rand");
  172 
  173 static int
  174 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
  175 {
  176         u_long val;
  177 
  178         val = ctob(physmem);
  179         return (sysctl_handle_long(oidp, &val, 0, req));
  180 }
  181 
  182 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
  183         0, 0, sysctl_hw_physmem, "LU", "");
  184 
  185 static int
  186 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
  187 {
  188         u_long val;
  189         val = ctob(realmem);
  190         return (sysctl_handle_long(oidp, &val, 0, req));
  191 }
  192 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
  193         0, 0, sysctl_hw_realmem, "LU", "");
  194 static int
  195 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
  196 {
  197         u_long val;
  198 
  199         val = ctob(physmem - cnt.v_wire_count);
  200         return (sysctl_handle_long(oidp, &val, 0, req));
  201 }
  202 
  203 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
  204         0, 0, sysctl_hw_usermem, "LU", "");
  205 
  206 SYSCTL_ULONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
  207 
  208 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
  209 
  210 static int
  211 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
  212 {
  213         int error;
  214 #ifdef SCTL_MASK32
  215         int i;
  216         uint32_t pagesizes32[MAXPAGESIZES];
  217 
  218         if (req->flags & SCTL_MASK32) {
  219                 /*
  220                  * Recreate the "pagesizes" array with 32-bit elements.  Truncate
  221                  * any page size greater than UINT32_MAX to zero.
  222                  */
  223                 for (i = 0; i < MAXPAGESIZES; i++)
  224                         pagesizes32[i] = (uint32_t)pagesizes[i];
  225 
  226                 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
  227         } else
  228 #endif
  229                 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
  230         return (error);
  231 }
  232 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
  233     NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
  234 
  235 static char     machine_arch[] = MACHINE_ARCH;
  236 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
  237     machine_arch, 0, "System architecture");
  238 
  239 static int
  240 sysctl_hostname(SYSCTL_HANDLER_ARGS)
  241 {
  242         struct prison *pr, *cpr;
  243         size_t pr_offset;
  244         char tmpname[MAXHOSTNAMELEN];
  245         int descend, error, len;
  246 
  247         /*
  248          * This function can set: hostname domainname hostuuid.
  249          * Keep that in mind when comments say "hostname".
  250          */
  251         pr_offset = (size_t)arg1;
  252         len = arg2;
  253         KASSERT(len <= sizeof(tmpname),
  254             ("length %d too long for %s", len, __func__));
  255 
  256         pr = req->td->td_ucred->cr_prison;
  257         if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
  258                 return (EPERM);
  259         /*
  260          * Make a local copy of hostname to get/set so we don't have to hold
  261          * the jail mutex during the sysctl copyin/copyout activities.
  262          */
  263         mtx_lock(&pr->pr_mtx);
  264         bcopy((char *)pr + pr_offset, tmpname, len);
  265         mtx_unlock(&pr->pr_mtx);
  266 
  267         error = sysctl_handle_string(oidp, tmpname, len, req);
  268 
  269         if (req->newptr != NULL && error == 0) {
  270                 /*
  271                  * Copy the locally set hostname to all jails that share
  272                  * this host info.
  273                  */
  274                 sx_slock(&allprison_lock);
  275                 while (!(pr->pr_flags & PR_HOST))
  276                         pr = pr->pr_parent;
  277                 mtx_lock(&pr->pr_mtx);
  278                 bcopy(tmpname, (char *)pr + pr_offset, len);
  279                 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
  280                         if (cpr->pr_flags & PR_HOST)
  281                                 descend = 0;
  282                         else
  283                                 bcopy(tmpname, (char *)cpr + pr_offset, len);
  284                 mtx_unlock(&pr->pr_mtx);
  285                 sx_sunlock(&allprison_lock);
  286         }
  287         return (error);
  288 }
  289 
  290 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
  291     CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
  292     (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
  293     sysctl_hostname, "A", "Hostname");
  294 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
  295     CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
  296     (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
  297     sysctl_hostname, "A", "Name of the current YP/NIS domain");
  298 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
  299     CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
  300     (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
  301     sysctl_hostname, "A", "Host UUID");
  302 
  303 static int      regression_securelevel_nonmonotonic = 0;
  304 
  305 #ifdef REGRESSION
  306 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
  307     &regression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
  308 #endif
  309 
  310 static int
  311 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
  312 {
  313         struct prison *pr, *cpr;
  314         int descend, error, level;
  315 
  316         pr = req->td->td_ucred->cr_prison;
  317 
  318         /*
  319          * Reading the securelevel is easy, since the current jail's level
  320          * is known to be at least as secure as any higher levels.  Perform
  321          * a lockless read since the securelevel is an integer.
  322          */
  323         level = pr->pr_securelevel;
  324         error = sysctl_handle_int(oidp, &level, 0, req);
  325         if (error || !req->newptr)
  326                 return (error);
  327         /* Permit update only if the new securelevel exceeds the old. */
  328         sx_slock(&allprison_lock);
  329         mtx_lock(&pr->pr_mtx);
  330         if (!regression_securelevel_nonmonotonic &&
  331             level < pr->pr_securelevel) {
  332                 mtx_unlock(&pr->pr_mtx);
  333                 sx_sunlock(&allprison_lock);
  334                 return (EPERM);
  335         }
  336         pr->pr_securelevel = level;
  337         /*
  338          * Set all child jails to be at least this level, but do not lower
  339          * them (even if regression_securelevel_nonmonotonic).
  340          */
  341         FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
  342                 if (cpr->pr_securelevel < level)
  343                         cpr->pr_securelevel = level;
  344         }
  345         mtx_unlock(&pr->pr_mtx);
  346         sx_sunlock(&allprison_lock);
  347         return (error);
  348 }
  349 
  350 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
  351     CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
  352     "I", "Current secure level");
  353 
  354 #ifdef INCLUDE_CONFIG_FILE
  355 /* Actual kernel configuration options. */
  356 extern char kernconfstring[];
  357 
  358 static int
  359 sysctl_kern_config(SYSCTL_HANDLER_ARGS)
  360 {
  361         return (sysctl_handle_string(oidp, kernconfstring,
  362             strlen(kernconfstring), req));
  363 }
  364 
  365 SYSCTL_PROC(_kern, OID_AUTO, conftxt, CTLTYPE_STRING|CTLFLAG_RW, 
  366     0, 0, sysctl_kern_config, "", "Kernel configuration file");
  367 #endif
  368 
  369 static int
  370 sysctl_hostid(SYSCTL_HANDLER_ARGS)
  371 {
  372         struct prison *pr, *cpr;
  373         u_long tmpid;
  374         int descend, error;
  375 
  376         /*
  377          * Like sysctl_hostname, except it operates on a u_long
  378          * instead of a string, and is used only for hostid.
  379          */
  380         pr = req->td->td_ucred->cr_prison;
  381         if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
  382                 return (EPERM);
  383         tmpid = pr->pr_hostid;
  384         error = sysctl_handle_long(oidp, &tmpid, 0, req);
  385 
  386         if (req->newptr != NULL && error == 0) {
  387                 sx_slock(&allprison_lock);
  388                 while (!(pr->pr_flags & PR_HOST))
  389                         pr = pr->pr_parent;
  390                 mtx_lock(&pr->pr_mtx);
  391                 pr->pr_hostid = tmpid;
  392                 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
  393                         if (cpr->pr_flags & PR_HOST)
  394                                 descend = 0;
  395                         else
  396                                 cpr->pr_hostid = tmpid;
  397                 mtx_unlock(&pr->pr_mtx);
  398                 sx_sunlock(&allprison_lock);
  399         }
  400         return (error);
  401 }
  402 
  403 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
  404     CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
  405     NULL, 0, sysctl_hostid, "LU", "Host ID");
  406 
  407 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
  408 
  409 #ifdef COMPAT_FREEBSD4
  410 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
  411 #endif
  412 
  413 #ifdef COMPAT_FREEBSD5
  414 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
  415 #endif
  416 
  417 #ifdef COMPAT_FREEBSD6
  418 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
  419 #endif
  420 
  421 #ifdef COMPAT_FREEBSD7
  422 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
  423 #endif
  424 
  425 /*
  426  * This is really cheating.  These actually live in the libc, something
  427  * which I'm not quite sure is a good idea anyway, but in order for
  428  * getnext and friends to actually work, we define dummies here.
  429  */
  430 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
  431     "", 0, "PATH that finds all the standard utilities");
  432 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
  433     0, 0, "Max ibase/obase values in bc(1)");
  434 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
  435     0, 0, "Max array size in bc(1)");
  436 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
  437     0, 0, "Max scale value in bc(1)");
  438 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
  439     0, 0, "Max string length in bc(1)");
  440 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
  441     0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
  442 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
  443 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
  444     0, 0, "Max length (bytes) of a text-processing utility's input line");
  445 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
  446     0, 0, "Maximum number of repeats of a regexp permitted");
  447 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
  448     0, 0,
  449     "The version of POSIX 1003.2 with which the system attempts to comply");
  450 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
  451     0, 0, "Whether C development supports the C bindings option");
  452 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
  453     0, 0, "Whether system supports the C development utilities option");
  454 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
  455     0, 0, "");
  456 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
  457     0, 0, "Whether system supports FORTRAN development utilities");
  458 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
  459     0, 0, "Whether system supports FORTRAN runtime utilities");
  460 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
  461     0, 0, "Whether system supports creation of locales");
  462 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
  463     0, 0, "Whether system supports software development utilities");
  464 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
  465     0, 0, "Whether system supports the user portability utilities");
  466 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
  467     0, 0, "Min Maximum number of streams a process may have open at one time");
  468 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
  469     0, 0, "Min Maximum number of types supported for timezone names");
  470 
  471 #include <sys/vnode.h>
  472 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
  473     0, sizeof(struct vnode), "sizeof(struct vnode)");
  474 
  475 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
  476     0, sizeof(struct proc), "sizeof(struct proc)");
  477 
  478 #include <sys/bio.h>
  479 #include <sys/buf.h>
  480 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
  481     0, sizeof(struct bio), "sizeof(struct bio)");
  482 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
  483     0, sizeof(struct buf), "sizeof(struct buf)");
  484 
  485 #include <sys/user.h>
  486 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
  487     0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
  488 
  489 /* XXX compatibility, remove for 6.0 */
  490 #include <sys/imgact.h>
  491 #include <sys/imgact_elf.h>
  492 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
  493     &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
  494     "compatibility for kern.fallback_elf_brand");

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