kern_sysctl.c revision 172930
11541Srgrimes/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This code is derived from software contributed to Berkeley by 61541Srgrimes * Mike Karels at Berkeley Software Design, Inc. 71541Srgrimes * 812623Sphk * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 912623Sphk * project, to make these variables more userfriendly. 1012623Sphk * 111541Srgrimes * Redistribution and use in source and binary forms, with or without 121541Srgrimes * modification, are permitted provided that the following conditions 131541Srgrimes * are met: 141541Srgrimes * 1. Redistributions of source code must retain the above copyright 151541Srgrimes * notice, this list of conditions and the following disclaimer. 161541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171541Srgrimes * notice, this list of conditions and the following disclaimer in the 181541Srgrimes * documentation and/or other materials provided with the distribution. 191541Srgrimes * 4. Neither the name of the University nor the names of its contributors 201541Srgrimes * may be used to endorse or promote products derived from this software 211541Srgrimes * without specific prior written permission. 221541Srgrimes * 231541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 241541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 251541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 261541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 271541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 281541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 291541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 301541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 311541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 321541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 331541Srgrimes * SUCH DAMAGE. 341541Srgrimes * 351541Srgrimes * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 361541Srgrimes */ 371541Srgrimes 38116182Sobrien#include <sys/cdefs.h> 39116182Sobrien__FBSDID("$FreeBSD: head/sys/kern/kern_sysctl.c 172930 2007-10-24 19:04:04Z rwatson $"); 40116182Sobrien 4131778Seivind#include "opt_compat.h" 42106025Srwatson#include "opt_mac.h" 4331778Seivind 441541Srgrimes#include <sys/param.h> 4548274Speter#include <sys/systm.h> 4648274Speter#include <sys/kernel.h> 471541Srgrimes#include <sys/sysctl.h> 4812623Sphk#include <sys/malloc.h> 49164033Srwatson#include <sys/priv.h> 5012662Sdg#include <sys/proc.h> 5182746Sdillon#include <sys/lock.h> 5282746Sdillon#include <sys/mutex.h> 5393616Salfred#include <sys/sx.h> 5415103Sphk#include <sys/sysproto.h> 55163606Srwatson 56163606Srwatson#include <security/mac/mac_framework.h> 57163606Srwatson 5812645Sbde#include <vm/vm.h> 5912662Sdg#include <vm/vm_extern.h> 6012645Sbde 6130354Sphkstatic MALLOC_DEFINE(M_SYSCTL, "sysctl", "sysctl internal magic"); 6263212Sabialstatic MALLOC_DEFINE(M_SYSCTLOID, "sysctloid", "sysctl dynamic oids"); 63100833Struckmanstatic MALLOC_DEFINE(M_SYSCTLTMP, "sysctltmp", "sysctl temp output buffer"); 6430309Sphk 6512429Sphk/* 6693625Srwatson * Locking - this locks the sysctl tree in memory. 6712429Sphk */ 6893625Srwatsonstatic struct sx sysctllock; 6912429Sphk 7093625Srwatson#define SYSCTL_LOCK() sx_xlock(&sysctllock) 71105999Smux#define SYSCTL_UNLOCK() sx_xunlock(&sysctllock) 72112107Sjhb#define SYSCTL_INIT() sx_init(&sysctllock, "sysctl lock") 7393616Salfred 7462573Sphkstatic int sysctl_root(SYSCTL_HANDLER_ARGS); 7512429Sphk 7644078Sdfrstruct sysctl_oid_list sysctl__children; /* root list */ 7712152Sphk 7863212Sabialstatic struct sysctl_oid * 7963212Sabialsysctl_find_oidname(const char *name, struct sysctl_oid_list *list) 8063212Sabial{ 8163212Sabial struct sysctl_oid *oidp; 8263212Sabial 8363212Sabial SLIST_FOREACH(oidp, list, oid_link) { 8463212Sabial if (strcmp(oidp->oid_name, name) == 0) { 8563212Sabial return (oidp); 8663212Sabial } 8763212Sabial } 8863212Sabial return (NULL); 8963212Sabial} 9063212Sabial 9112623Sphk/* 9212623Sphk * Initialization of the MIB tree. 9312623Sphk * 9444078Sdfr * Order by number in each list. 9512623Sphk */ 9612429Sphk 9780338Sroamvoid 9880338Sroamsysctl_register_oid(struct sysctl_oid *oidp) 9912152Sphk{ 10044078Sdfr struct sysctl_oid_list *parent = oidp->oid_parent; 10144078Sdfr struct sysctl_oid *p; 10244078Sdfr struct sysctl_oid *q; 10312197Sbde 10444078Sdfr /* 10563212Sabial * First check if another oid with the same name already 10663212Sabial * exists in the parent's list. 10763212Sabial */ 10863212Sabial p = sysctl_find_oidname(oidp->oid_name, parent); 10963212Sabial if (p != NULL) { 11063212Sabial if ((p->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 11163212Sabial p->oid_refcnt++; 11263212Sabial return; 11363212Sabial } else { 11463212Sabial printf("can't re-use a leaf (%s)!\n", p->oid_name); 11563212Sabial return; 11663212Sabial } 11763212Sabial } 11863212Sabial /* 11944078Sdfr * If this oid has a number OID_AUTO, give it a number which 12080339Sroam * is greater than any current oid. 12180339Sroam * NOTE: DO NOT change the starting value here, change it in 12280339Sroam * <sys/sysctl.h>, and make sure it is at least 256 to 12380339Sroam * accomodate e.g. net.inet.raw as a static sysctl node. 12444078Sdfr */ 12544078Sdfr if (oidp->oid_number == OID_AUTO) { 12680339Sroam static int newoid = CTL_AUTO_START; 12771510Smckusick 12871510Smckusick oidp->oid_number = newoid++; 12971510Smckusick if (newoid == 0x7fffffff) 13071510Smckusick panic("out of oids"); 13144078Sdfr } 13284832Sroam#if 0 13384832Sroam else if (oidp->oid_number >= CTL_AUTO_START) { 13484832Sroam /* do not panic; this happens when unregistering sysctl sets */ 13584832Sroam printf("static sysctl oid too high: %d", oidp->oid_number); 13684832Sroam } 13784832Sroam#endif 13844078Sdfr 13944078Sdfr /* 14044078Sdfr * Insert the oid into the parent's list in order. 14144078Sdfr */ 14244078Sdfr q = NULL; 14344078Sdfr SLIST_FOREACH(p, parent, oid_link) { 14444078Sdfr if (oidp->oid_number < p->oid_number) 14544078Sdfr break; 14644078Sdfr q = p; 14744078Sdfr } 14844078Sdfr if (q) 14944078Sdfr SLIST_INSERT_AFTER(q, oidp, oid_link); 15044078Sdfr else 15144078Sdfr SLIST_INSERT_HEAD(parent, oidp, oid_link); 15212152Sphk} 15312131Sphk 15480338Sroamvoid 15580338Sroamsysctl_unregister_oid(struct sysctl_oid *oidp) 15612152Sphk{ 157115391Smux struct sysctl_oid *p; 158115391Smux int error; 159115391Smux 160115391Smux error = ENOENT; 161115391Smux if (oidp->oid_number == OID_AUTO) { 162115391Smux error = EINVAL; 163115391Smux } else { 164115391Smux SLIST_FOREACH(p, oidp->oid_parent, oid_link) { 165115391Smux if (p == oidp) { 166115391Smux SLIST_REMOVE(oidp->oid_parent, oidp, 167115391Smux sysctl_oid, oid_link); 168115391Smux error = 0; 169115391Smux break; 170115391Smux } 171115391Smux } 172115391Smux } 173115391Smux 174115391Smux /* 175115391Smux * This can happen when a module fails to register and is 176115391Smux * being unloaded afterwards. It should not be a panic() 177115391Smux * for normal use. 178115391Smux */ 179115391Smux if (error) 180115391Smux printf("%s: failed to unregister sysctl\n", __func__); 18144078Sdfr} 18212152Sphk 18363212Sabial/* Initialize a new context to keep track of dynamically added sysctls. */ 18463212Sabialint 18563212Sabialsysctl_ctx_init(struct sysctl_ctx_list *c) 18663212Sabial{ 18763212Sabial 18863212Sabial if (c == NULL) { 18963212Sabial return (EINVAL); 19063212Sabial } 19163212Sabial TAILQ_INIT(c); 19263212Sabial return (0); 19363212Sabial} 19463212Sabial 19563212Sabial/* Free the context, and destroy all dynamic oids registered in this context */ 19663212Sabialint 19763212Sabialsysctl_ctx_free(struct sysctl_ctx_list *clist) 19863212Sabial{ 19963212Sabial struct sysctl_ctx_entry *e, *e1; 20063212Sabial int error; 20163212Sabial 20263212Sabial error = 0; 20363212Sabial /* 20463212Sabial * First perform a "dry run" to check if it's ok to remove oids. 20563212Sabial * XXX FIXME 20663212Sabial * XXX This algorithm is a hack. But I don't know any 20763212Sabial * XXX better solution for now... 20863212Sabial */ 20963212Sabial TAILQ_FOREACH(e, clist, link) { 21063212Sabial error = sysctl_remove_oid(e->entry, 0, 0); 21163212Sabial if (error) 21263212Sabial break; 21363212Sabial } 21463212Sabial /* 21563212Sabial * Restore deregistered entries, either from the end, 21663212Sabial * or from the place where error occured. 21763212Sabial * e contains the entry that was not unregistered 21863212Sabial */ 21963212Sabial if (error) 22063212Sabial e1 = TAILQ_PREV(e, sysctl_ctx_list, link); 22163212Sabial else 22263212Sabial e1 = TAILQ_LAST(clist, sysctl_ctx_list); 22363212Sabial while (e1 != NULL) { 22463212Sabial sysctl_register_oid(e1->entry); 22563212Sabial e1 = TAILQ_PREV(e1, sysctl_ctx_list, link); 22663212Sabial } 22763212Sabial if (error) 22863212Sabial return(EBUSY); 22963212Sabial /* Now really delete the entries */ 23063212Sabial e = TAILQ_FIRST(clist); 23163212Sabial while (e != NULL) { 23263212Sabial e1 = TAILQ_NEXT(e, link); 23363212Sabial error = sysctl_remove_oid(e->entry, 1, 0); 23463212Sabial if (error) 23563212Sabial panic("sysctl_remove_oid: corrupt tree, entry: %s", 23663212Sabial e->entry->oid_name); 23763212Sabial free(e, M_SYSCTLOID); 23863212Sabial e = e1; 23963212Sabial } 24063212Sabial return (error); 24163212Sabial} 24263212Sabial 24363212Sabial/* Add an entry to the context */ 24463212Sabialstruct sysctl_ctx_entry * 24563212Sabialsysctl_ctx_entry_add(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 24663212Sabial{ 24763212Sabial struct sysctl_ctx_entry *e; 24863212Sabial 24963212Sabial if (clist == NULL || oidp == NULL) 25063212Sabial return(NULL); 251111119Simp e = malloc(sizeof(struct sysctl_ctx_entry), M_SYSCTLOID, M_WAITOK); 25263212Sabial e->entry = oidp; 25363212Sabial TAILQ_INSERT_HEAD(clist, e, link); 25463212Sabial return (e); 25563212Sabial} 25663212Sabial 25763212Sabial/* Find an entry in the context */ 25863212Sabialstruct sysctl_ctx_entry * 25963212Sabialsysctl_ctx_entry_find(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 26063212Sabial{ 26163212Sabial struct sysctl_ctx_entry *e; 26263212Sabial 26363212Sabial if (clist == NULL || oidp == NULL) 26463212Sabial return(NULL); 26571999Sphk TAILQ_FOREACH(e, clist, link) { 26663212Sabial if(e->entry == oidp) 26763212Sabial return(e); 26863212Sabial } 26963212Sabial return (e); 27063212Sabial} 27163212Sabial 27244078Sdfr/* 27363212Sabial * Delete an entry from the context. 27463212Sabial * NOTE: this function doesn't free oidp! You have to remove it 27563212Sabial * with sysctl_remove_oid(). 27663212Sabial */ 27763212Sabialint 27863212Sabialsysctl_ctx_entry_del(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 27963212Sabial{ 28063212Sabial struct sysctl_ctx_entry *e; 28163212Sabial 28263212Sabial if (clist == NULL || oidp == NULL) 28363212Sabial return (EINVAL); 28463212Sabial e = sysctl_ctx_entry_find(clist, oidp); 28563212Sabial if (e != NULL) { 28663212Sabial TAILQ_REMOVE(clist, e, link); 28763212Sabial free(e, M_SYSCTLOID); 28863212Sabial return (0); 28963212Sabial } else 29063212Sabial return (ENOENT); 29163212Sabial} 29263212Sabial 29363212Sabial/* 29463212Sabial * Remove dynamically created sysctl trees. 29563212Sabial * oidp - top of the tree to be removed 29663212Sabial * del - if 0 - just deregister, otherwise free up entries as well 29763212Sabial * recurse - if != 0 traverse the subtree to be deleted 29863212Sabial */ 29963212Sabialint 30063212Sabialsysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse) 30163212Sabial{ 30263212Sabial struct sysctl_oid *p; 30363212Sabial int error; 30463212Sabial 30563212Sabial if (oidp == NULL) 30663212Sabial return(EINVAL); 30763212Sabial if ((oidp->oid_kind & CTLFLAG_DYN) == 0) { 30863212Sabial printf("can't remove non-dynamic nodes!\n"); 30963212Sabial return (EINVAL); 31063212Sabial } 31163212Sabial /* 31263212Sabial * WARNING: normal method to do this should be through 31363212Sabial * sysctl_ctx_free(). Use recursing as the last resort 31463212Sabial * method to purge your sysctl tree of leftovers... 31563212Sabial * However, if some other code still references these nodes, 31663212Sabial * it will panic. 31763212Sabial */ 31863212Sabial if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 31963212Sabial if (oidp->oid_refcnt == 1) { 32063212Sabial SLIST_FOREACH(p, SYSCTL_CHILDREN(oidp), oid_link) { 32163212Sabial if (!recurse) 32263212Sabial return (ENOTEMPTY); 32363212Sabial error = sysctl_remove_oid(p, del, recurse); 32463212Sabial if (error) 32563212Sabial return (error); 32663212Sabial } 32763212Sabial if (del) 32863212Sabial free(SYSCTL_CHILDREN(oidp), M_SYSCTLOID); 32963212Sabial } 33063212Sabial } 33163212Sabial if (oidp->oid_refcnt > 1 ) { 33263212Sabial oidp->oid_refcnt--; 33363212Sabial } else { 33463212Sabial if (oidp->oid_refcnt == 0) { 33563212Sabial printf("Warning: bad oid_refcnt=%u (%s)!\n", 33663212Sabial oidp->oid_refcnt, oidp->oid_name); 33763212Sabial return (EINVAL); 33863212Sabial } 33963212Sabial sysctl_unregister_oid(oidp); 34063212Sabial if (del) { 341141433Sphk if (oidp->oid_descr) 342141433Sphk free((void *)(uintptr_t)(const void *)oidp->oid_descr, M_SYSCTLOID); 34363978Speter free((void *)(uintptr_t)(const void *)oidp->oid_name, 34463978Speter M_SYSCTLOID); 34563212Sabial free(oidp, M_SYSCTLOID); 34663212Sabial } 34763212Sabial } 34863212Sabial return (0); 34963212Sabial} 35063212Sabial 35163212Sabial/* 35263212Sabial * Create new sysctls at run time. 35363212Sabial * clist may point to a valid context initialized with sysctl_ctx_init(). 35463212Sabial */ 35563212Sabialstruct sysctl_oid * 35663212Sabialsysctl_add_oid(struct sysctl_ctx_list *clist, struct sysctl_oid_list *parent, 35770679Sjhb int number, const char *name, int kind, void *arg1, int arg2, 35870679Sjhb int (*handler)(SYSCTL_HANDLER_ARGS), const char *fmt, const char *descr) 35963212Sabial{ 36063212Sabial struct sysctl_oid *oidp; 36163212Sabial ssize_t len; 36263978Speter char *newname; 36363212Sabial 36463212Sabial /* You have to hook up somewhere.. */ 36563212Sabial if (parent == NULL) 36663212Sabial return(NULL); 36763212Sabial /* Check if the node already exists, otherwise create it */ 36863212Sabial oidp = sysctl_find_oidname(name, parent); 36963212Sabial if (oidp != NULL) { 37063212Sabial if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 37163212Sabial oidp->oid_refcnt++; 37263212Sabial /* Update the context */ 37363212Sabial if (clist != NULL) 37463212Sabial sysctl_ctx_entry_add(clist, oidp); 37563212Sabial return (oidp); 37663212Sabial } else { 37763212Sabial printf("can't re-use a leaf (%s)!\n", name); 37863212Sabial return (NULL); 37963212Sabial } 38063212Sabial } 381111119Simp oidp = malloc(sizeof(struct sysctl_oid), M_SYSCTLOID, M_WAITOK|M_ZERO); 38263212Sabial oidp->oid_parent = parent; 38363212Sabial SLIST_NEXT(oidp, oid_link) = NULL; 38463212Sabial oidp->oid_number = number; 38563212Sabial oidp->oid_refcnt = 1; 38663212Sabial len = strlen(name); 387111119Simp newname = malloc(len + 1, M_SYSCTLOID, M_WAITOK); 38863978Speter bcopy(name, newname, len + 1); 38963978Speter newname[len] = '\0'; 39063978Speter oidp->oid_name = newname; 39163212Sabial oidp->oid_handler = handler; 39263212Sabial oidp->oid_kind = CTLFLAG_DYN | kind; 39363212Sabial if ((kind & CTLTYPE) == CTLTYPE_NODE) { 39463212Sabial /* Allocate space for children */ 395132776Skan SYSCTL_CHILDREN_SET(oidp, malloc(sizeof(struct sysctl_oid_list), 396132776Skan M_SYSCTLOID, M_WAITOK)); 39763212Sabial SLIST_INIT(SYSCTL_CHILDREN(oidp)); 39863212Sabial } else { 39963212Sabial oidp->oid_arg1 = arg1; 40063212Sabial oidp->oid_arg2 = arg2; 40163212Sabial } 40263212Sabial oidp->oid_fmt = fmt; 40388006Sluigi if (descr) { 40488006Sluigi int len = strlen(descr) + 1; 405141433Sphk oidp->oid_descr = malloc(len, M_SYSCTLOID, M_WAITOK); 406141433Sphk if (oidp->oid_descr) 407141433Sphk strcpy((char *)(uintptr_t)(const void *)oidp->oid_descr, descr); 40888006Sluigi } 40963212Sabial /* Update the context, if used */ 41063212Sabial if (clist != NULL) 41163212Sabial sysctl_ctx_entry_add(clist, oidp); 41263212Sabial /* Register this oid */ 41363212Sabial sysctl_register_oid(oidp); 41463212Sabial return (oidp); 41563212Sabial} 41663212Sabial 41763212Sabial/* 418126319Sdes * Reparent an existing oid. 419126319Sdes */ 420126319Sdesint 421126319Sdessysctl_move_oid(struct sysctl_oid *oid, struct sysctl_oid_list *parent) 422126319Sdes{ 423126319Sdes struct sysctl_oid *oidp; 424126319Sdes 425126319Sdes if (oid->oid_parent == parent) 426126319Sdes return (0); 427126319Sdes oidp = sysctl_find_oidname(oid->oid_name, parent); 428126319Sdes if (oidp != NULL) 429126319Sdes return (EEXIST); 430126319Sdes sysctl_unregister_oid(oid); 431126319Sdes oid->oid_parent = parent; 432126319Sdes oid->oid_number = OID_AUTO; 433126319Sdes sysctl_register_oid(oid); 434126319Sdes return (0); 435126319Sdes} 436126319Sdes 437126319Sdes/* 43844078Sdfr * Register the kernel's oids on startup. 43944078Sdfr */ 44078161SpeterSET_DECLARE(sysctl_set, struct sysctl_oid); 44112152Sphk 44280338Sroamstatic void 44380338Sroamsysctl_register_all(void *arg) 44438869Sbde{ 44578161Speter struct sysctl_oid **oidp; 44678161Speter 44793625Srwatson SYSCTL_INIT(); 44878161Speter SET_FOREACH(oidp, sysctl_set) 44978161Speter sysctl_register_oid(*oidp); 45038869Sbde} 45144078SdfrSYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_all, 0); 45244078Sdfr 45312623Sphk/* 45412623Sphk * "Staff-functions" 45512623Sphk * 45612650Sphk * These functions implement a presently undocumented interface 45712650Sphk * used by the sysctl program to walk the tree, and get the type 45812650Sphk * so it can print the value. 45912650Sphk * This interface is under work and consideration, and should probably 46012650Sphk * be killed with a big axe by the first person who can find the time. 46112650Sphk * (be aware though, that the proper interface isn't as obvious as it 46212650Sphk * may seem, there are various conflicting requirements. 46312650Sphk * 46412623Sphk * {0,0} printf the entire MIB-tree. 46512623Sphk * {0,1,...} return the name of the "..." OID. 46642467Sphk * {0,2,...} return the next OID. 46712623Sphk * {0,3} return the OID of the name in "new" 46812650Sphk * {0,4,...} return the kind & format info for the "..." OID. 46988006Sluigi * {0,5,...} return the description the "..." OID. 47012623Sphk */ 47112623Sphk 472136999Srwatson#ifdef SYSCTL_DEBUG 47312152Sphkstatic void 47444078Sdfrsysctl_sysctl_debug_dump_node(struct sysctl_oid_list *l, int i) 47512152Sphk{ 47644078Sdfr int k; 47744078Sdfr struct sysctl_oid *oidp; 47812152Sphk 47944078Sdfr SLIST_FOREACH(oidp, l, oid_link) { 48012152Sphk 48112152Sphk for (k=0; k<i; k++) 48212152Sphk printf(" "); 48312152Sphk 48444078Sdfr printf("%d %s ", oidp->oid_number, oidp->oid_name); 48512152Sphk 48612152Sphk printf("%c%c", 48744078Sdfr oidp->oid_kind & CTLFLAG_RD ? 'R':' ', 48844078Sdfr oidp->oid_kind & CTLFLAG_WR ? 'W':' '); 48912152Sphk 49044078Sdfr if (oidp->oid_handler) 49115241Sphk printf(" *Handler"); 49215241Sphk 49344078Sdfr switch (oidp->oid_kind & CTLTYPE) { 49412243Sphk case CTLTYPE_NODE: 49515241Sphk printf(" Node\n"); 49644078Sdfr if (!oidp->oid_handler) { 49712152Sphk sysctl_sysctl_debug_dump_node( 49844078Sdfr oidp->oid_arg1, i+2); 49912152Sphk } 50012152Sphk break; 50112152Sphk case CTLTYPE_INT: printf(" Int\n"); break; 50212152Sphk case CTLTYPE_STRING: printf(" String\n"); break; 50312152Sphk case CTLTYPE_QUAD: printf(" Quad\n"); break; 50412152Sphk case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; 50512152Sphk default: printf("\n"); 50612152Sphk } 50712152Sphk 50812152Sphk } 50912152Sphk} 51012152Sphk 51112152Sphkstatic int 51262573Sphksysctl_sysctl_debug(SYSCTL_HANDLER_ARGS) 51312152Sphk{ 51487024Speter int error; 51587024Speter 516164033Srwatson error = priv_check(req->td, PRIV_SYSCTL_DEBUG); 51787024Speter if (error) 518139483Spjd return (error); 51944078Sdfr sysctl_sysctl_debug_dump_node(&sysctl__children, 0); 520139483Spjd return (ENOENT); 52112152Sphk} 52212152Sphk 52312152SphkSYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, 52412623Sphk 0, 0, sysctl_sysctl_debug, "-", ""); 525136999Srwatson#endif 52612152Sphk 52712623Sphkstatic int 52862573Sphksysctl_sysctl_name(SYSCTL_HANDLER_ARGS) 52912623Sphk{ 53012623Sphk int *name = (int *) arg1; 53112623Sphk u_int namelen = arg2; 53244078Sdfr int error = 0; 53344078Sdfr struct sysctl_oid *oid; 53444972Sphk struct sysctl_oid_list *lsp = &sysctl__children, *lsp2; 53512623Sphk char buf[10]; 53612131Sphk 53712623Sphk while (namelen) { 53812623Sphk if (!lsp) { 53941514Sarchie snprintf(buf,sizeof(buf),"%d",*name); 54012623Sphk if (req->oldidx) 54112623Sphk error = SYSCTL_OUT(req, ".", 1); 54212623Sphk if (!error) 54312623Sphk error = SYSCTL_OUT(req, buf, strlen(buf)); 54412623Sphk if (error) 54512623Sphk return (error); 54612623Sphk namelen--; 54712623Sphk name++; 54812623Sphk continue; 54912623Sphk } 55044972Sphk lsp2 = 0; 55144078Sdfr SLIST_FOREACH(oid, lsp, oid_link) { 55244078Sdfr if (oid->oid_number != *name) 55312623Sphk continue; 55412131Sphk 55512623Sphk if (req->oldidx) 55612623Sphk error = SYSCTL_OUT(req, ".", 1); 55712623Sphk if (!error) 55844078Sdfr error = SYSCTL_OUT(req, oid->oid_name, 55944078Sdfr strlen(oid->oid_name)); 56012623Sphk if (error) 56112623Sphk return (error); 56212623Sphk 56312623Sphk namelen--; 56412623Sphk name++; 56512623Sphk 56644972Sphk if ((oid->oid_kind & CTLTYPE) != CTLTYPE_NODE) 56712623Sphk break; 56812623Sphk 56944078Sdfr if (oid->oid_handler) 57012623Sphk break; 57112623Sphk 57244972Sphk lsp2 = (struct sysctl_oid_list *)oid->oid_arg1; 57312623Sphk break; 57412623Sphk } 57544972Sphk lsp = lsp2; 57612623Sphk } 57712623Sphk return (SYSCTL_OUT(req, "", 1)); 57812623Sphk} 57912623Sphk 580141626Sphkstatic SYSCTL_NODE(_sysctl, 1, name, CTLFLAG_RD, sysctl_sysctl_name, ""); 58112623Sphk 58212623Sphkstatic int 58363978Spetersysctl_sysctl_next_ls(struct sysctl_oid_list *lsp, int *name, u_int namelen, 58444078Sdfr int *next, int *len, int level, struct sysctl_oid **oidpp) 58512623Sphk{ 58644078Sdfr struct sysctl_oid *oidp; 58712623Sphk 58812623Sphk *len = level; 58944078Sdfr SLIST_FOREACH(oidp, lsp, oid_link) { 59044078Sdfr *next = oidp->oid_number; 59144078Sdfr *oidpp = oidp; 59212623Sphk 593101650Smux if (oidp->oid_kind & CTLFLAG_SKIP) 594101650Smux continue; 595101650Smux 59612623Sphk if (!namelen) { 59744078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 598139483Spjd return (0); 59944078Sdfr if (oidp->oid_handler) 60012623Sphk /* We really should call the handler here...*/ 601139483Spjd return (0); 60244078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 60363978Speter if (!sysctl_sysctl_next_ls(lsp, 0, 0, next+1, 60444078Sdfr len, level+1, oidpp)) 605139483Spjd return (0); 606111260Srwatson goto emptynode; 60712623Sphk } 60812623Sphk 60944078Sdfr if (oidp->oid_number < *name) 61012623Sphk continue; 61112623Sphk 61244078Sdfr if (oidp->oid_number > *name) { 61344078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 614139483Spjd return (0); 61544078Sdfr if (oidp->oid_handler) 616139483Spjd return (0); 61744078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 61863978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, 61944078Sdfr next+1, len, level+1, oidpp)) 62012623Sphk return (0); 62115241Sphk goto next; 62212623Sphk } 62344078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 62412623Sphk continue; 62512623Sphk 62644078Sdfr if (oidp->oid_handler) 62712623Sphk continue; 62812623Sphk 62944078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 63063978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, next+1, 63144078Sdfr len, level+1, oidpp)) 63212623Sphk return (0); 63315241Sphk next: 63412623Sphk namelen = 1; 635111260Srwatson emptynode: 63612623Sphk *len = level; 63712623Sphk } 638139483Spjd return (1); 63912623Sphk} 64012623Sphk 64112623Sphkstatic int 64262573Sphksysctl_sysctl_next(SYSCTL_HANDLER_ARGS) 64312623Sphk{ 64412623Sphk int *name = (int *) arg1; 64512623Sphk u_int namelen = arg2; 64612623Sphk int i, j, error; 64712623Sphk struct sysctl_oid *oid; 64844078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 64912623Sphk int newoid[CTL_MAXNAME]; 65012623Sphk 65163978Speter i = sysctl_sysctl_next_ls(lsp, name, namelen, newoid, &j, 1, &oid); 65212623Sphk if (i) 653139483Spjd return (ENOENT); 65412650Sphk error = SYSCTL_OUT(req, newoid, j * sizeof (int)); 65512623Sphk return (error); 65612623Sphk} 65712623Sphk 658141626Sphkstatic SYSCTL_NODE(_sysctl, 2, next, CTLFLAG_RD, sysctl_sysctl_next, ""); 65912623Sphk 66012623Sphkstatic int 66144078Sdfrname2oid (char *name, int *oid, int *len, struct sysctl_oid **oidpp) 66212623Sphk{ 66344078Sdfr int i; 66444078Sdfr struct sysctl_oid *oidp; 66544078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 66612623Sphk char *p; 66712623Sphk 66812623Sphk if (!*name) 669139483Spjd return (ENOENT); 67012623Sphk 67112623Sphk p = name + strlen(name) - 1 ; 67212623Sphk if (*p == '.') 67312623Sphk *p = '\0'; 67412623Sphk 67512623Sphk *len = 0; 67612623Sphk 67712623Sphk for (p = name; *p && *p != '.'; p++) 67812623Sphk ; 67912623Sphk i = *p; 68012623Sphk if (i == '.') 68112623Sphk *p = '\0'; 68212623Sphk 68344078Sdfr oidp = SLIST_FIRST(lsp); 68412623Sphk 68544078Sdfr while (oidp && *len < CTL_MAXNAME) { 68644078Sdfr if (strcmp(name, oidp->oid_name)) { 68744078Sdfr oidp = SLIST_NEXT(oidp, oid_link); 68812623Sphk continue; 68912623Sphk } 69044078Sdfr *oid++ = oidp->oid_number; 69112623Sphk (*len)++; 69212623Sphk 69312623Sphk if (!i) { 69444078Sdfr if (oidpp) 69544078Sdfr *oidpp = oidp; 69612623Sphk return (0); 69712623Sphk } 69812623Sphk 69944078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 70012623Sphk break; 70112623Sphk 70244078Sdfr if (oidp->oid_handler) 70312623Sphk break; 70412623Sphk 70544078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 70644078Sdfr oidp = SLIST_FIRST(lsp); 70712623Sphk name = p+1; 70812623Sphk for (p = name; *p && *p != '.'; p++) 70912623Sphk ; 71012623Sphk i = *p; 71112623Sphk if (i == '.') 71212623Sphk *p = '\0'; 71312623Sphk } 714139483Spjd return (ENOENT); 71512623Sphk} 71612623Sphk 71712623Sphkstatic int 71862573Sphksysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) 71912623Sphk{ 72012623Sphk char *p; 72112623Sphk int error, oid[CTL_MAXNAME], len; 72212623Sphk struct sysctl_oid *op = 0; 72312623Sphk 72412623Sphk if (!req->newlen) 725139483Spjd return (ENOENT); 72645140Sphk if (req->newlen >= MAXPATHLEN) /* XXX arbitrary, undocumented */ 72745140Sphk return (ENAMETOOLONG); 72812623Sphk 729111119Simp p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); 73012623Sphk 73112623Sphk error = SYSCTL_IN(req, p, req->newlen); 73212623Sphk if (error) { 73312623Sphk free(p, M_SYSCTL); 73412623Sphk return (error); 73512623Sphk } 73612623Sphk 73712623Sphk p [req->newlen] = '\0'; 73812623Sphk 73912623Sphk error = name2oid(p, oid, &len, &op); 74012623Sphk 74112623Sphk free(p, M_SYSCTL); 74212623Sphk 74312623Sphk if (error) 74412623Sphk return (error); 74512623Sphk 74612650Sphk error = SYSCTL_OUT(req, oid, len * sizeof *oid); 74712623Sphk return (error); 74812623Sphk} 74912623Sphk 75012910SphkSYSCTL_PROC(_sysctl, 3, name2oid, CTLFLAG_RW|CTLFLAG_ANYBODY, 0, 0, 75112623Sphk sysctl_sysctl_name2oid, "I", ""); 75212623Sphk 75312623Sphkstatic int 75462573Sphksysctl_sysctl_oidfmt(SYSCTL_HANDLER_ARGS) 75512623Sphk{ 75644078Sdfr struct sysctl_oid *oid; 75753977Sgreen int error; 75812623Sphk 75953977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); 76053977Sgreen if (error) 76153977Sgreen return (error); 76212623Sphk 76344078Sdfr if (!oid->oid_fmt) 76453977Sgreen return (ENOENT); 76553977Sgreen error = SYSCTL_OUT(req, &oid->oid_kind, sizeof(oid->oid_kind)); 76653977Sgreen if (error) 76753977Sgreen return (error); 76853977Sgreen error = SYSCTL_OUT(req, oid->oid_fmt, strlen(oid->oid_fmt) + 1); 76912650Sphk return (error); 77012623Sphk} 77112623Sphk 77242467Sphk 773141626Sphkstatic SYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, ""); 77412623Sphk 77588006Sluigistatic int 77688006Sluigisysctl_sysctl_oiddescr(SYSCTL_HANDLER_ARGS) 77788006Sluigi{ 77888006Sluigi struct sysctl_oid *oid; 77988006Sluigi int error; 78088006Sluigi 78188006Sluigi error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); 78288006Sluigi if (error) 78388006Sluigi return (error); 78488006Sluigi 785141433Sphk if (!oid->oid_descr) 78688006Sluigi return (ENOENT); 787141433Sphk error = SYSCTL_OUT(req, oid->oid_descr, strlen(oid->oid_descr) + 1); 78888006Sluigi return (error); 78988006Sluigi} 79088006Sluigi 791141626Sphkstatic SYSCTL_NODE(_sysctl, 5, oiddescr, CTLFLAG_RD, sysctl_sysctl_oiddescr, ""); 79288006Sluigi 79312243Sphk/* 79412623Sphk * Default "handler" functions. 79512623Sphk */ 79612623Sphk 79712623Sphk/* 79842095Sdfr * Handle an int, signed or unsigned. 79912243Sphk * Two cases: 80012243Sphk * a variable: point arg1 at it. 80112243Sphk * a constant: pass it in arg2. 80212243Sphk */ 80312243Sphk 80411865Sphkint 80562573Sphksysctl_handle_int(SYSCTL_HANDLER_ARGS) 80611863Sphk{ 807100833Struckman int tmpout, error = 0; 80811863Sphk 809100833Struckman /* 810100833Struckman * Attempt to get a coherent snapshot by making a copy of the data. 811100833Struckman */ 81212243Sphk if (arg1) 813100833Struckman tmpout = *(int *)arg1; 81420506Sbde else 815100833Struckman tmpout = arg2; 816100833Struckman error = SYSCTL_OUT(req, &tmpout, sizeof(int)); 81711863Sphk 81812243Sphk if (error || !req->newptr) 81912243Sphk return (error); 82011863Sphk 82112243Sphk if (!arg1) 82212243Sphk error = EPERM; 82312243Sphk else 82412243Sphk error = SYSCTL_IN(req, arg1, sizeof(int)); 82512243Sphk return (error); 82611863Sphk} 82711863Sphk 828155758Sandre 82912243Sphk/* 830155758Sandre * Based on on sysctl_handle_int() convert milliseconds into ticks. 831155758Sandre */ 832155758Sandre 833155758Sandreint 834155758Sandresysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS) 835155758Sandre{ 836155758Sandre int error, s, tt; 837155758Sandre 838155758Sandre tt = *(int *)oidp->oid_arg1; 839155758Sandre s = (int)((int64_t)tt * 1000 / hz); 840155758Sandre 841155758Sandre error = sysctl_handle_int(oidp, &s, 0, req); 842155758Sandre if (error || !req->newptr) 843155758Sandre return (error); 844155758Sandre 845155758Sandre tt = (int)((int64_t)s * hz / 1000); 846155758Sandre if (tt < 1) 847155758Sandre return (EINVAL); 848155758Sandre 849155758Sandre *(int *)oidp->oid_arg1 = tt; 850155758Sandre return (0); 851155758Sandre} 852155758Sandre 853155758Sandre 854155758Sandre/* 85545140Sphk * Handle a long, signed or unsigned. arg1 points to it. 85638517Sdfr */ 85738517Sdfr 85838517Sdfrint 85962573Sphksysctl_handle_long(SYSCTL_HANDLER_ARGS) 86038517Sdfr{ 86138517Sdfr int error = 0; 862136404Speter long tmplong; 863136404Speter#ifdef SCTL_MASK32 864136404Speter int tmpint; 865136404Speter#endif 86638517Sdfr 867100833Struckman /* 868100833Struckman * Attempt to get a coherent snapshot by making a copy of the data. 869100833Struckman */ 87045140Sphk if (!arg1) 87145140Sphk return (EINVAL); 872136404Speter tmplong = *(long *)arg1; 873136404Speter#ifdef SCTL_MASK32 874136404Speter if (req->flags & SCTL_MASK32) { 875136404Speter tmpint = tmplong; 876136404Speter error = SYSCTL_OUT(req, &tmpint, sizeof(int)); 877136404Speter } else 878136404Speter#endif 879136404Speter error = SYSCTL_OUT(req, &tmplong, sizeof(long)); 88038517Sdfr 88138517Sdfr if (error || !req->newptr) 88238517Sdfr return (error); 88338517Sdfr 884136404Speter#ifdef SCTL_MASK32 885136404Speter if (req->flags & SCTL_MASK32) { 886136404Speter error = SYSCTL_IN(req, &tmpint, sizeof(int)); 887136404Speter *(long *)arg1 = (long)tmpint; 888136404Speter } else 889136404Speter#endif 890136404Speter error = SYSCTL_IN(req, arg1, sizeof(long)); 89138517Sdfr return (error); 89238517Sdfr} 89338517Sdfr 89438517Sdfr/* 895170288Sdwmalone * Handle a 64 bit int, signed or unsigned. arg1 points to it. 896170288Sdwmalone */ 897170288Sdwmalone 898170288Sdwmaloneint 899170288Sdwmalonesysctl_handle_quad(SYSCTL_HANDLER_ARGS) 900170288Sdwmalone{ 901170288Sdwmalone int error = 0; 902170288Sdwmalone uint64_t tmpout; 903170288Sdwmalone 904170288Sdwmalone /* 905170288Sdwmalone * Attempt to get a coherent snapshot by making a copy of the data. 906170288Sdwmalone */ 907170288Sdwmalone if (!arg1) 908170288Sdwmalone return (EINVAL); 909170288Sdwmalone tmpout = *(uint64_t *)arg1; 910170288Sdwmalone error = SYSCTL_OUT(req, &tmpout, sizeof(uint64_t)); 911170288Sdwmalone 912170288Sdwmalone if (error || !req->newptr) 913170288Sdwmalone return (error); 914170288Sdwmalone 915170288Sdwmalone error = SYSCTL_IN(req, arg1, sizeof(uint64_t)); 916170288Sdwmalone return (error); 917170288Sdwmalone} 918170288Sdwmalone 919170288Sdwmalone/* 92012243Sphk * Handle our generic '\0' terminated 'C' string. 92112243Sphk * Two cases: 92212243Sphk * a variable string: point arg1 at it, arg2 is max length. 92312243Sphk * a constant string: point arg1 at it, arg2 is zero. 92412243Sphk */ 92512243Sphk 92611865Sphkint 92762573Sphksysctl_handle_string(SYSCTL_HANDLER_ARGS) 92811863Sphk{ 92912243Sphk int error=0; 930100833Struckman char *tmparg; 931100833Struckman size_t outlen; 93211863Sphk 933100833Struckman /* 934100833Struckman * Attempt to get a coherent snapshot by copying to a 935100833Struckman * temporary kernel buffer. 936100833Struckman */ 937100833Struckmanretry: 938100833Struckman outlen = strlen((char *)arg1)+1; 939111119Simp tmparg = malloc(outlen, M_SYSCTLTMP, M_WAITOK); 940105354Srobert 941105354Srobert if (strlcpy(tmparg, (char *)arg1, outlen) >= outlen) { 942100833Struckman free(tmparg, M_SYSCTLTMP); 943100833Struckman goto retry; 944100833Struckman } 945105354Srobert 946100833Struckman error = SYSCTL_OUT(req, tmparg, outlen); 947100833Struckman free(tmparg, M_SYSCTLTMP); 94811863Sphk 94945140Sphk if (error || !req->newptr) 95012243Sphk return (error); 95111863Sphk 95245140Sphk if ((req->newlen - req->newidx) >= arg2) { 95345140Sphk error = EINVAL; 95412243Sphk } else { 95512243Sphk arg2 = (req->newlen - req->newidx); 95612243Sphk error = SYSCTL_IN(req, arg1, arg2); 95712243Sphk ((char *)arg1)[arg2] = '\0'; 95811863Sphk } 95912131Sphk 96012131Sphk return (error); 96111863Sphk} 96211863Sphk 96312243Sphk/* 96412243Sphk * Handle any kind of opaque data. 96512243Sphk * arg1 points to it, arg2 is the size. 96612243Sphk */ 96712243Sphk 96811865Sphkint 96962573Sphksysctl_handle_opaque(SYSCTL_HANDLER_ARGS) 97011863Sphk{ 971120803Sbms int error, tries; 972120803Sbms u_int generation; 973120813Sbms struct sysctl_req req2; 97412243Sphk 975100833Struckman /* 976120803Sbms * Attempt to get a coherent snapshot, by using the thread 977120803Sbms * pre-emption counter updated from within mi_switch() to 978120803Sbms * determine if we were pre-empted during a bcopy() or 979120803Sbms * copyout(). Make 3 attempts at doing this before giving up. 980120803Sbms * If we encounter an error, stop immediately. 981100833Struckman */ 982120803Sbms tries = 0; 983120813Sbms req2 = *req; 984120813Sbmsretry: 985120813Sbms generation = curthread->td_generation; 986120813Sbms error = SYSCTL_OUT(req, arg1, arg2); 987120813Sbms if (error) 988120813Sbms return (error); 989120813Sbms tries++; 990120813Sbms if (generation != curthread->td_generation && tries < 3) { 991120813Sbms *req = req2; 992120813Sbms goto retry; 993120813Sbms } 99412243Sphk 99512243Sphk error = SYSCTL_IN(req, arg1, arg2); 99612243Sphk 99712243Sphk return (error); 99812243Sphk} 99912243Sphk 100012260Sphk/* 100112260Sphk * Transfer functions to/from kernel space. 100212260Sphk * XXX: rather untested at this point 100312260Sphk */ 100412260Sphkstatic int 100538517Sdfrsysctl_old_kernel(struct sysctl_req *req, const void *p, size_t l) 100612243Sphk{ 100738517Sdfr size_t i = 0; 100812260Sphk 100912260Sphk if (req->oldptr) { 101038517Sdfr i = l; 101173971Stmm if (req->oldlen <= req->oldidx) 101273971Stmm i = 0; 101373971Stmm else 101473971Stmm if (i > req->oldlen - req->oldidx) 101573971Stmm i = req->oldlen - req->oldidx; 101612260Sphk if (i > 0) 101717971Sbde bcopy(p, (char *)req->oldptr + req->oldidx, i); 101812243Sphk } 101912260Sphk req->oldidx += l; 102016282Snate if (req->oldptr && i != l) 102111863Sphk return (ENOMEM); 102212260Sphk return (0); 102312243Sphk} 102412243Sphk 102512260Sphkstatic int 102638517Sdfrsysctl_new_kernel(struct sysctl_req *req, void *p, size_t l) 102712243Sphk{ 102812260Sphk if (!req->newptr) 1029139483Spjd return (0); 103012260Sphk if (req->newlen - req->newidx < l) 103111863Sphk return (EINVAL); 103217971Sbde bcopy((char *)req->newptr + req->newidx, p, l); 103312243Sphk req->newidx += l; 103412131Sphk return (0); 103511863Sphk} 103611863Sphk 103716282Snateint 103883366Sjuliankernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, 1039136404Speter size_t *oldlenp, void *new, size_t newlen, size_t *retval, int flags) 104016282Snate{ 104116282Snate int error = 0; 104216282Snate struct sysctl_req req; 104316282Snate 104416282Snate bzero(&req, sizeof req); 104516282Snate 104686183Srwatson req.td = td; 1047136404Speter req.flags = flags; 104816282Snate 104916282Snate if (oldlenp) { 105016282Snate req.oldlen = *oldlenp; 105116282Snate } 1052127052Struckman req.validlen = req.oldlen; 105316282Snate 105416282Snate if (old) { 105516282Snate req.oldptr= old; 105616282Snate } 105716282Snate 105877646Sdd if (new != NULL) { 105916282Snate req.newlen = newlen; 106016282Snate req.newptr = new; 106116282Snate } 106216282Snate 106316282Snate req.oldfunc = sysctl_old_kernel; 106416282Snate req.newfunc = sysctl_new_kernel; 1065120781Sbms req.lock = REQ_LOCKED; 106616282Snate 106793625Srwatson SYSCTL_LOCK(); 106816282Snate 106916282Snate error = sysctl_root(0, name, namelen, &req); 1070120813Sbms 1071127052Struckman if (req.lock == REQ_WIRED && req.validlen > 0) 1072127052Struckman vsunlock(req.oldptr, req.validlen); 107316282Snate 107493625Srwatson SYSCTL_UNLOCK(); 107516282Snate 107616282Snate if (error && error != ENOMEM) 107716282Snate return (error); 107816282Snate 107916282Snate if (retval) { 1080127052Struckman if (req.oldptr && req.oldidx > req.validlen) 1081127052Struckman *retval = req.validlen; 108216282Snate else 108316282Snate *retval = req.oldidx; 108416282Snate } 108516282Snate return (error); 108616282Snate} 108716282Snate 108876834Sjlemonint 108983366Sjuliankernel_sysctlbyname(struct thread *td, char *name, void *old, size_t *oldlenp, 1090136404Speter void *new, size_t newlen, size_t *retval, int flags) 109176834Sjlemon{ 109276834Sjlemon int oid[CTL_MAXNAME]; 109378620Smjacob size_t oidlen, plen; 109478620Smjacob int error; 109576834Sjlemon 109676834Sjlemon oid[0] = 0; /* sysctl internal magic */ 109776834Sjlemon oid[1] = 3; /* name2oid */ 109876834Sjlemon oidlen = sizeof(oid); 109976834Sjlemon 110083366Sjulian error = kernel_sysctl(td, oid, 2, oid, &oidlen, 1101136404Speter (void *)name, strlen(name), &plen, flags); 110276834Sjlemon if (error) 110376834Sjlemon return (error); 110476834Sjlemon 110583366Sjulian error = kernel_sysctl(td, oid, plen / sizeof(int), old, oldlenp, 1106136404Speter new, newlen, retval, flags); 110776834Sjlemon return (error); 110876834Sjlemon} 110976834Sjlemon 111012260Sphk/* 111112260Sphk * Transfer function to/from user space. 111212260Sphk */ 111312260Sphkstatic int 111438517Sdfrsysctl_old_user(struct sysctl_req *req, const void *p, size_t l) 111512243Sphk{ 111638517Sdfr int error = 0; 1117126253Struckman size_t i, len, origidx; 111812243Sphk 1119126253Struckman origidx = req->oldidx; 1120126253Struckman req->oldidx += l; 1121126253Struckman if (req->oldptr == NULL) 1122126253Struckman return (0); 1123148864Scsjp /* 1124148864Scsjp * If we have not wired the user supplied buffer and we are currently 1125148864Scsjp * holding locks, drop a witness warning, as it's possible that 1126148864Scsjp * write operations to the user page can sleep. 1127148864Scsjp */ 1128148864Scsjp if (req->lock != REQ_WIRED) 1129111883Sjhb WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1130111883Sjhb "sysctl_old_user()"); 1131126253Struckman i = l; 1132127052Struckman len = req->validlen; 1133126253Struckman if (len <= origidx) 1134126253Struckman i = 0; 1135126253Struckman else { 1136126253Struckman if (i > len - origidx) 1137126253Struckman i = len - origidx; 1138126253Struckman error = copyout(p, (char *)req->oldptr + origidx, i); 113912260Sphk } 114012243Sphk if (error) 114112243Sphk return (error); 1142126253Struckman if (i < l) 114312243Sphk return (ENOMEM); 114412260Sphk return (0); 114512243Sphk} 114612243Sphk 114712260Sphkstatic int 114838517Sdfrsysctl_new_user(struct sysctl_req *req, void *p, size_t l) 114912243Sphk{ 115012285Sphk int error; 115112260Sphk 115212260Sphk if (!req->newptr) 1153139483Spjd return (0); 115412260Sphk if (req->newlen - req->newidx < l) 115512243Sphk return (EINVAL); 1156148873Scsjp WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1157148873Scsjp "sysctl_new_user()"); 115817971Sbde error = copyin((char *)req->newptr + req->newidx, p, l); 115912243Sphk req->newidx += l; 116012243Sphk return (error); 116112243Sphk} 116212243Sphk 1163100487Struckman/* 1164100487Struckman * Wire the user space destination buffer. If set to a value greater than 1165100487Struckman * zero, the len parameter limits the maximum amount of wired memory. 1166100487Struckman */ 1167126253Struckmanint 1168100487Struckmansysctl_wire_old_buffer(struct sysctl_req *req, size_t len) 1169100487Struckman{ 1170126253Struckman int ret; 1171154792Struckman size_t i, wiredlen; 1172154792Struckman char *cp, dummy; 1173126253Struckman 1174126253Struckman wiredlen = (len > 0 && len < req->oldlen) ? len : req->oldlen; 1175126253Struckman ret = 0; 1176120781Sbms if (req->lock == REQ_LOCKED && req->oldptr && 1177120781Sbms req->oldfunc == sysctl_old_user) { 1178127050Struckman if (wiredlen != 0) { 1179127050Struckman ret = vslock(req->oldptr, wiredlen); 1180130327Sgreen if (ret != 0) { 1181130327Sgreen if (ret != ENOMEM) 1182130327Sgreen return (ret); 1183130327Sgreen wiredlen = 0; 1184130327Sgreen } 1185154792Struckman /* 1186154792Struckman * Touch all the wired pages to avoid PTE modified 1187154792Struckman * bit emulation traps on Alpha while holding locks 1188154792Struckman * in the sysctl handler. 1189154792Struckman */ 1190154792Struckman for (i = (wiredlen + PAGE_SIZE - 1) / PAGE_SIZE, 1191154792Struckman cp = req->oldptr; i > 0; i--, cp += PAGE_SIZE) { 1192154792Struckman copyin(cp, &dummy, 1); 1193154792Struckman copyout(&dummy, cp, 1); 1194154792Struckman } 1195126253Struckman } 1196127050Struckman req->lock = REQ_WIRED; 1197127052Struckman req->validlen = wiredlen; 1198100487Struckman } 1199127050Struckman return (0); 1200100487Struckman} 1201100487Struckman 12021541Srgrimesint 120353977Sgreensysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 120453977Sgreen int *nindx, struct sysctl_req *req) 120512131Sphk{ 120644078Sdfr struct sysctl_oid *oid; 120753977Sgreen int indx; 120812131Sphk 120953977Sgreen oid = SLIST_FIRST(&sysctl__children); 121012131Sphk indx = 0; 121144078Sdfr while (oid && indx < CTL_MAXNAME) { 121244078Sdfr if (oid->oid_number == name[indx]) { 121312131Sphk indx++; 121444078Sdfr if (oid->oid_kind & CTLFLAG_NOLOCK) 1215120781Sbms req->lock = REQ_UNLOCKED; 121644078Sdfr if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 121753977Sgreen if (oid->oid_handler != NULL || 121853977Sgreen indx == namelen) { 121953977Sgreen *noid = oid; 122053977Sgreen if (nindx != NULL) 122153977Sgreen *nindx = indx; 122253977Sgreen return (0); 122353977Sgreen } 122453977Sgreen oid = SLIST_FIRST( 122553977Sgreen (struct sysctl_oid_list *)oid->oid_arg1); 122653977Sgreen } else if (indx == namelen) { 122753977Sgreen *noid = oid; 122853977Sgreen if (nindx != NULL) 122953977Sgreen *nindx = indx; 123053977Sgreen return (0); 123112131Sphk } else { 123253977Sgreen return (ENOTDIR); 123312131Sphk } 123412131Sphk } else { 123544078Sdfr oid = SLIST_NEXT(oid, oid_link); 123612131Sphk } 123712131Sphk } 123853977Sgreen return (ENOENT); 123953977Sgreen} 124053977Sgreen 124153977Sgreen/* 124253977Sgreen * Traverse our tree, and find the right node, execute whatever it points 124353977Sgreen * to, and return the resulting error code. 124453977Sgreen */ 124553977Sgreen 1246104094Sphkstatic int 124762573Sphksysctl_root(SYSCTL_HANDLER_ARGS) 124853977Sgreen{ 124953977Sgreen struct sysctl_oid *oid; 1250109246Sdillon int error, indx, lvl; 125153977Sgreen 125253977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, &indx, req); 125353977Sgreen if (error) 125453977Sgreen return (error); 125553977Sgreen 125653977Sgreen if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 125753977Sgreen /* 125853977Sgreen * You can't call a sysctl when it's a node, but has 125953977Sgreen * no handler. Inform the user that it's a node. 126053977Sgreen * The indx may or may not be the same as namelen. 126153977Sgreen */ 126253977Sgreen if (oid->oid_handler == NULL) 126353977Sgreen return (EISDIR); 126453977Sgreen } 126553977Sgreen 126683968Srwatson /* Is this sysctl writable? */ 126783968Srwatson if (req->newptr && !(oid->oid_kind & CTLFLAG_WR)) 126812131Sphk return (EPERM); 126912131Sphk 127092953Srwatson KASSERT(req->td != NULL, ("sysctl_root(): req->td == NULL")); 127192953Srwatson 127283968Srwatson /* Is this sysctl sensitive to securelevels? */ 127383968Srwatson if (req->newptr && (oid->oid_kind & CTLFLAG_SECURE)) { 1274109246Sdillon lvl = (oid->oid_kind & CTLMASK_SECURE) >> CTLSHIFT_SECURE; 1275109246Sdillon error = securelevel_gt(req->td->td_ucred, lvl); 127692953Srwatson if (error) 127792953Srwatson return (error); 127883968Srwatson } 127912910Sphk 128083968Srwatson /* Is this sysctl writable by only privileged users? */ 128183968Srwatson if (req->newptr && !(oid->oid_kind & CTLFLAG_ANYBODY)) { 128292953Srwatson if (oid->oid_kind & CTLFLAG_PRISON) 1283170587Srwatson error = priv_check(req->td, PRIV_SYSCTL_WRITEJAIL); 128492953Srwatson else 1285164033Srwatson error = priv_check(req->td, PRIV_SYSCTL_WRITE); 128692953Srwatson if (error) 128792953Srwatson return (error); 128883968Srwatson } 128983968Srwatson 129044078Sdfr if (!oid->oid_handler) 1291139483Spjd return (EINVAL); 129212131Sphk 1293126121Spjd if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 1294132776Skan arg1 = (int *)arg1 + indx; 1295126121Spjd arg2 -= indx; 1296126121Spjd } else { 1297126121Spjd arg1 = oid->oid_arg1; 1298126121Spjd arg2 = oid->oid_arg2; 1299126121Spjd } 1300126121Spjd#ifdef MAC 1301172930Srwatson error = mac_system_check_sysctl(req->td->td_ucred, oid, arg1, arg2, 1302126121Spjd req); 1303126121Spjd if (error != 0) 1304126121Spjd return (error); 1305126121Spjd#endif 1306126121Spjd error = oid->oid_handler(oid, arg1, arg2, req); 1307126121Spjd 130853977Sgreen return (error); 130912131Sphk} 131012131Sphk 131112221Sbde#ifndef _SYS_SYSPROTO_H_ 131212171Sphkstruct sysctl_args { 131312171Sphk int *name; 131412171Sphk u_int namelen; 131512171Sphk void *old; 131612171Sphk size_t *oldlenp; 131712171Sphk void *new; 131812171Sphk size_t newlen; 131912171Sphk}; 132012221Sbde#endif 132112131Sphkint 132283366Sjulian__sysctl(struct thread *td, struct sysctl_args *uap) 13231541Srgrimes{ 132482746Sdillon int error, name[CTL_MAXNAME]; 132538517Sdfr size_t j; 13261541Srgrimes 13271541Srgrimes if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) 13281541Srgrimes return (EINVAL); 132911863Sphk 13303308Sphk error = copyin(uap->name, &name, uap->namelen * sizeof(int)); 13313308Sphk if (error) 13321541Srgrimes return (error); 13331541Srgrimes 133482746Sdillon mtx_lock(&Giant); 133582746Sdillon 133683366Sjulian error = userland_sysctl(td, name, uap->namelen, 133712171Sphk uap->old, uap->oldlenp, 0, 1338136404Speter uap->new, uap->newlen, &j, 0); 133912260Sphk if (error && error != ENOMEM) 134082746Sdillon goto done2; 134112260Sphk if (uap->oldlenp) { 134282746Sdillon int i = copyout(&j, uap->oldlenp, sizeof(j)); 134312260Sphk if (i) 134482746Sdillon error = i; 134512260Sphk } 134682746Sdillondone2: 134782746Sdillon mtx_unlock(&Giant); 134812260Sphk return (error); 134912171Sphk} 135012171Sphk 135112171Sphk/* 135212171Sphk * This is used from various compatibility syscalls too. That's why name 135312171Sphk * must be in kernel space. 135412171Sphk */ 135512171Sphkint 135683366Sjulianuserland_sysctl(struct thread *td, int *name, u_int namelen, void *old, 1357136404Speter size_t *oldlenp, int inkernel, void *new, size_t newlen, size_t *retval, 1358136404Speter int flags) 135912171Sphk{ 136012429Sphk int error = 0; 1361127052Struckman struct sysctl_req req; 136212171Sphk 136312243Sphk bzero(&req, sizeof req); 136412243Sphk 136586183Srwatson req.td = td; 1366136404Speter req.flags = flags; 136712285Sphk 136812171Sphk if (oldlenp) { 136912171Sphk if (inkernel) { 137012243Sphk req.oldlen = *oldlenp; 137112171Sphk } else { 137212260Sphk error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); 137312171Sphk if (error) 137412171Sphk return (error); 137512171Sphk } 137612171Sphk } 1377127052Struckman req.validlen = req.oldlen; 137812171Sphk 137912243Sphk if (old) { 138052644Sphk if (!useracc(old, req.oldlen, VM_PROT_WRITE)) 138112243Sphk return (EFAULT); 138212243Sphk req.oldptr= old; 138312243Sphk } 138412131Sphk 138577646Sdd if (new != NULL) { 1386172038Srwatson if (!useracc(new, newlen, VM_PROT_READ)) 138712243Sphk return (EFAULT); 138812243Sphk req.newlen = newlen; 138912243Sphk req.newptr = new; 139011863Sphk } 139112131Sphk 139212243Sphk req.oldfunc = sysctl_old_user; 139312243Sphk req.newfunc = sysctl_new_user; 1394120781Sbms req.lock = REQ_LOCKED; 139511863Sphk 139693625Srwatson SYSCTL_LOCK(); 139712429Sphk 139816159Sphk do { 1399127052Struckman req.oldidx = 0; 1400127052Struckman req.newidx = 0; 1401127052Struckman error = sysctl_root(0, name, namelen, &req); 140216159Sphk } while (error == EAGAIN); 140312243Sphk 1404127052Struckman if (req.lock == REQ_WIRED && req.validlen > 0) 1405127052Struckman vsunlock(req.oldptr, req.validlen); 140612429Sphk 140793625Srwatson SYSCTL_UNLOCK(); 140812429Sphk 140912260Sphk if (error && error != ENOMEM) 141012260Sphk return (error); 141112260Sphk 141212260Sphk if (retval) { 1413127052Struckman if (req.oldptr && req.oldidx > req.validlen) 1414127052Struckman *retval = req.validlen; 141512260Sphk else 141612260Sphk *retval = req.oldidx; 141711863Sphk } 141812260Sphk return (error); 14191541Srgrimes} 14201541Srgrimes 14211541Srgrimes#ifdef COMPAT_43 14221541Srgrimes#include <sys/socket.h> 142315103Sphk#include <vm/vm_param.h> 142415103Sphk 14251541Srgrimes#define KINFO_PROC (0<<8) 14261541Srgrimes#define KINFO_RT (1<<8) 14271541Srgrimes#define KINFO_VNODE (2<<8) 14281541Srgrimes#define KINFO_FILE (3<<8) 14291541Srgrimes#define KINFO_METER (4<<8) 14301541Srgrimes#define KINFO_LOADAVG (5<<8) 14311541Srgrimes#define KINFO_CLOCKRATE (6<<8) 14321541Srgrimes 14339455Speter/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 14349455Speter#define KINFO_BSDI_SYSINFO (101<<8) 14359455Speter 14369455Speter/* 14379455Speter * XXX this is bloat, but I hope it's better here than on the potentially 14389455Speter * limited kernel stack... -Peter 14399455Speter */ 14409455Speter 144112819Sphkstatic struct { 14429455Speter int bsdi_machine; /* "i386" on BSD/386 */ 14439455Speter/* ^^^ this is an offset to the string, relative to the struct start */ 14449455Speter char *pad0; 14459455Speter long pad1; 14469455Speter long pad2; 14479455Speter long pad3; 14489455Speter u_long pad4; 14499455Speter u_long pad5; 14509455Speter u_long pad6; 14519455Speter 14529455Speter int bsdi_ostype; /* "BSD/386" on BSD/386 */ 14539455Speter int bsdi_osrelease; /* "1.1" on BSD/386 */ 14549455Speter long pad7; 14559455Speter long pad8; 14569455Speter char *pad9; 14579455Speter 14589455Speter long pad10; 14599455Speter long pad11; 14609455Speter int pad12; 14619455Speter long pad13; 14629455Speter quad_t pad14; 14639455Speter long pad15; 14649455Speter 14659455Speter struct timeval pad16; 14669455Speter /* we dont set this, because BSDI's uname used gethostname() instead */ 14679455Speter int bsdi_hostname; /* hostname on BSD/386 */ 14689455Speter 14699455Speter /* the actual string data is appended here */ 14709455Speter 14719455Speter} bsdi_si; 1472167232Srwatson 14739455Speter/* 14749455Speter * this data is appended to the end of the bsdi_si structure during copyout. 14759455Speter * The "char *" offsets are relative to the base of the bsdi_si struct. 14769455Speter * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 14779455Speter * should not exceed the length of the buffer here... (or else!! :-) 14789455Speter */ 147912819Sphkstatic char bsdi_strings[80]; /* It had better be less than this! */ 14809455Speter 148112221Sbde#ifndef _SYS_SYSPROTO_H_ 14821541Srgrimesstruct getkerninfo_args { 14831541Srgrimes int op; 14841541Srgrimes char *where; 148538864Sbde size_t *size; 14861541Srgrimes int arg; 14871541Srgrimes}; 148812221Sbde#endif 14891549Srgrimesint 149083366Sjulianogetkerninfo(struct thread *td, struct getkerninfo_args *uap) 14911541Srgrimes{ 149212171Sphk int error, name[6]; 149338517Sdfr size_t size; 149482494Speter u_int needed = 0; 14951541Srgrimes 149682746Sdillon mtx_lock(&Giant); 149782746Sdillon 14981541Srgrimes switch (uap->op & 0xff00) { 14991541Srgrimes 15001541Srgrimes case KINFO_RT: 150112171Sphk name[0] = CTL_NET; 150212171Sphk name[1] = PF_ROUTE; 150312171Sphk name[2] = 0; 150412171Sphk name[3] = (uap->op & 0xff0000) >> 16; 150512171Sphk name[4] = uap->op & 0xff; 150612171Sphk name[5] = uap->arg; 150783366Sjulian error = userland_sysctl(td, name, 6, uap->where, uap->size, 1508136417Sphk 0, 0, 0, &size, 0); 15091541Srgrimes break; 15101541Srgrimes 15111541Srgrimes case KINFO_VNODE: 151212171Sphk name[0] = CTL_KERN; 151312171Sphk name[1] = KERN_VNODE; 151483366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1515136417Sphk 0, 0, 0, &size, 0); 15161541Srgrimes break; 15171541Srgrimes 15181541Srgrimes case KINFO_PROC: 151912171Sphk name[0] = CTL_KERN; 152012171Sphk name[1] = KERN_PROC; 152112171Sphk name[2] = uap->op & 0xff; 152212171Sphk name[3] = uap->arg; 152383366Sjulian error = userland_sysctl(td, name, 4, uap->where, uap->size, 1524136417Sphk 0, 0, 0, &size, 0); 15251541Srgrimes break; 15261541Srgrimes 15271541Srgrimes case KINFO_FILE: 152812171Sphk name[0] = CTL_KERN; 152912171Sphk name[1] = KERN_FILE; 153083366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1531136417Sphk 0, 0, 0, &size, 0); 15321541Srgrimes break; 15331541Srgrimes 15341541Srgrimes case KINFO_METER: 153512171Sphk name[0] = CTL_VM; 1536109102Smux name[1] = VM_TOTAL; 153783366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1538136417Sphk 0, 0, 0, &size, 0); 15391541Srgrimes break; 15401541Srgrimes 15411541Srgrimes case KINFO_LOADAVG: 154212171Sphk name[0] = CTL_VM; 154312171Sphk name[1] = VM_LOADAVG; 154483366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1545136417Sphk 0, 0, 0, &size, 0); 15461541Srgrimes break; 15471541Srgrimes 15481541Srgrimes case KINFO_CLOCKRATE: 154912171Sphk name[0] = CTL_KERN; 155012171Sphk name[1] = KERN_CLOCKRATE; 155183366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1552136417Sphk 0, 0, 0, &size, 0); 15531541Srgrimes break; 15541541Srgrimes 15559455Speter case KINFO_BSDI_SYSINFO: { 15569455Speter /* 15579455Speter * this is pretty crude, but it's just enough for uname() 15589455Speter * from BSDI's 1.x libc to work. 15599455Speter * 156082494Speter * *size gives the size of the buffer before the call, and 156182494Speter * the amount of data copied after a successful call. 156282494Speter * If successful, the return value is the amount of data 156382494Speter * available, which can be larger than *size. 156482494Speter * 156582494Speter * BSDI's 2.x product apparently fails with ENOMEM if *size 156682494Speter * is too small. 15679455Speter */ 15689455Speter 15699455Speter u_int left; 15709455Speter char *s; 15719455Speter 15729455Speter bzero((char *)&bsdi_si, sizeof(bsdi_si)); 15739455Speter bzero(bsdi_strings, sizeof(bsdi_strings)); 15749455Speter 15759455Speter s = bsdi_strings; 15769455Speter 15779455Speter bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 15789455Speter strcpy(s, ostype); 15799455Speter s += strlen(s) + 1; 15809455Speter 15819455Speter bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 15829455Speter strcpy(s, osrelease); 15839455Speter s += strlen(s) + 1; 15849455Speter 15859455Speter bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 15869455Speter strcpy(s, machine); 15879455Speter s += strlen(s) + 1; 15889455Speter 15899455Speter needed = sizeof(bsdi_si) + (s - bsdi_strings); 15909455Speter 159182494Speter if ((uap->where == NULL) || (uap->size == NULL)) { 15929455Speter /* process is asking how much buffer to supply.. */ 15939455Speter size = needed; 15949455Speter error = 0; 15959455Speter break; 15969455Speter } 15979455Speter 159882494Speter if ((error = copyin(uap->size, &size, sizeof(size))) != 0) 159982494Speter break; 16009455Speter 16019455Speter /* if too much buffer supplied, trim it down */ 16029455Speter if (size > needed) 16039455Speter size = needed; 16049455Speter 16059455Speter /* how much of the buffer is remaining */ 16069455Speter left = size; 16079455Speter 16089455Speter if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 16099455Speter break; 16109455Speter 16119455Speter /* is there any point in continuing? */ 16129455Speter if (left > sizeof(bsdi_si)) { 16139455Speter left -= sizeof(bsdi_si); 16149455Speter error = copyout(&bsdi_strings, 16159455Speter uap->where + sizeof(bsdi_si), left); 16169455Speter } 16179455Speter break; 16189455Speter } 16199455Speter 16201541Srgrimes default: 162182746Sdillon error = EOPNOTSUPP; 162282746Sdillon break; 16231541Srgrimes } 162482746Sdillon if (error == 0) { 162583366Sjulian td->td_retval[0] = needed ? needed : size; 162682746Sdillon if (uap->size) { 162799012Salfred error = copyout(&size, uap->size, sizeof(size)); 162882746Sdillon } 162982746Sdillon } 163082746Sdillon mtx_unlock(&Giant); 16311541Srgrimes return (error); 16321541Srgrimes} 16331541Srgrimes#endif /* COMPAT_43 */ 1634