kern_sysctl.c revision 174113
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 174113 2007-11-30 21:29:08Z peter $"); 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/* 418174113Speter * Rename an existing oid. 419174113Speter */ 420174113Spetervoid 421174113Spetersysctl_rename_oid(struct sysctl_oid *oidp, const char *name) 422174113Speter{ 423174113Speter ssize_t len; 424174113Speter char *newname; 425174113Speter void *oldname; 426174113Speter 427174113Speter oldname = (void *)(uintptr_t)(const void *)oidp->oid_name; 428174113Speter len = strlen(name); 429174113Speter newname = malloc(len + 1, M_SYSCTLOID, M_WAITOK); 430174113Speter bcopy(name, newname, len + 1); 431174113Speter newname[len] = '\0'; 432174113Speter oidp->oid_name = newname; 433174113Speter free(oldname, M_SYSCTLOID); 434174113Speter} 435174113Speter 436174113Speter/* 437126319Sdes * Reparent an existing oid. 438126319Sdes */ 439126319Sdesint 440126319Sdessysctl_move_oid(struct sysctl_oid *oid, struct sysctl_oid_list *parent) 441126319Sdes{ 442126319Sdes struct sysctl_oid *oidp; 443126319Sdes 444126319Sdes if (oid->oid_parent == parent) 445126319Sdes return (0); 446126319Sdes oidp = sysctl_find_oidname(oid->oid_name, parent); 447126319Sdes if (oidp != NULL) 448126319Sdes return (EEXIST); 449126319Sdes sysctl_unregister_oid(oid); 450126319Sdes oid->oid_parent = parent; 451126319Sdes oid->oid_number = OID_AUTO; 452126319Sdes sysctl_register_oid(oid); 453126319Sdes return (0); 454126319Sdes} 455126319Sdes 456126319Sdes/* 45744078Sdfr * Register the kernel's oids on startup. 45844078Sdfr */ 45978161SpeterSET_DECLARE(sysctl_set, struct sysctl_oid); 46012152Sphk 46180338Sroamstatic void 46280338Sroamsysctl_register_all(void *arg) 46338869Sbde{ 46478161Speter struct sysctl_oid **oidp; 46578161Speter 46693625Srwatson SYSCTL_INIT(); 46778161Speter SET_FOREACH(oidp, sysctl_set) 46878161Speter sysctl_register_oid(*oidp); 46938869Sbde} 47044078SdfrSYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_all, 0); 47144078Sdfr 47212623Sphk/* 47312623Sphk * "Staff-functions" 47412623Sphk * 47512650Sphk * These functions implement a presently undocumented interface 47612650Sphk * used by the sysctl program to walk the tree, and get the type 47712650Sphk * so it can print the value. 47812650Sphk * This interface is under work and consideration, and should probably 47912650Sphk * be killed with a big axe by the first person who can find the time. 48012650Sphk * (be aware though, that the proper interface isn't as obvious as it 48112650Sphk * may seem, there are various conflicting requirements. 48212650Sphk * 48312623Sphk * {0,0} printf the entire MIB-tree. 48412623Sphk * {0,1,...} return the name of the "..." OID. 48542467Sphk * {0,2,...} return the next OID. 48612623Sphk * {0,3} return the OID of the name in "new" 48712650Sphk * {0,4,...} return the kind & format info for the "..." OID. 48888006Sluigi * {0,5,...} return the description the "..." OID. 48912623Sphk */ 49012623Sphk 491136999Srwatson#ifdef SYSCTL_DEBUG 49212152Sphkstatic void 49344078Sdfrsysctl_sysctl_debug_dump_node(struct sysctl_oid_list *l, int i) 49412152Sphk{ 49544078Sdfr int k; 49644078Sdfr struct sysctl_oid *oidp; 49712152Sphk 49844078Sdfr SLIST_FOREACH(oidp, l, oid_link) { 49912152Sphk 50012152Sphk for (k=0; k<i; k++) 50112152Sphk printf(" "); 50212152Sphk 50344078Sdfr printf("%d %s ", oidp->oid_number, oidp->oid_name); 50412152Sphk 50512152Sphk printf("%c%c", 50644078Sdfr oidp->oid_kind & CTLFLAG_RD ? 'R':' ', 50744078Sdfr oidp->oid_kind & CTLFLAG_WR ? 'W':' '); 50812152Sphk 50944078Sdfr if (oidp->oid_handler) 51015241Sphk printf(" *Handler"); 51115241Sphk 51244078Sdfr switch (oidp->oid_kind & CTLTYPE) { 51312243Sphk case CTLTYPE_NODE: 51415241Sphk printf(" Node\n"); 51544078Sdfr if (!oidp->oid_handler) { 51612152Sphk sysctl_sysctl_debug_dump_node( 51744078Sdfr oidp->oid_arg1, i+2); 51812152Sphk } 51912152Sphk break; 52012152Sphk case CTLTYPE_INT: printf(" Int\n"); break; 52112152Sphk case CTLTYPE_STRING: printf(" String\n"); break; 52212152Sphk case CTLTYPE_QUAD: printf(" Quad\n"); break; 52312152Sphk case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; 52412152Sphk default: printf("\n"); 52512152Sphk } 52612152Sphk 52712152Sphk } 52812152Sphk} 52912152Sphk 53012152Sphkstatic int 53162573Sphksysctl_sysctl_debug(SYSCTL_HANDLER_ARGS) 53212152Sphk{ 53387024Speter int error; 53487024Speter 535164033Srwatson error = priv_check(req->td, PRIV_SYSCTL_DEBUG); 53687024Speter if (error) 537139483Spjd return (error); 53844078Sdfr sysctl_sysctl_debug_dump_node(&sysctl__children, 0); 539139483Spjd return (ENOENT); 54012152Sphk} 54112152Sphk 54212152SphkSYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, 54312623Sphk 0, 0, sysctl_sysctl_debug, "-", ""); 544136999Srwatson#endif 54512152Sphk 54612623Sphkstatic int 54762573Sphksysctl_sysctl_name(SYSCTL_HANDLER_ARGS) 54812623Sphk{ 54912623Sphk int *name = (int *) arg1; 55012623Sphk u_int namelen = arg2; 55144078Sdfr int error = 0; 55244078Sdfr struct sysctl_oid *oid; 55344972Sphk struct sysctl_oid_list *lsp = &sysctl__children, *lsp2; 55412623Sphk char buf[10]; 55512131Sphk 55612623Sphk while (namelen) { 55712623Sphk if (!lsp) { 55841514Sarchie snprintf(buf,sizeof(buf),"%d",*name); 55912623Sphk if (req->oldidx) 56012623Sphk error = SYSCTL_OUT(req, ".", 1); 56112623Sphk if (!error) 56212623Sphk error = SYSCTL_OUT(req, buf, strlen(buf)); 56312623Sphk if (error) 56412623Sphk return (error); 56512623Sphk namelen--; 56612623Sphk name++; 56712623Sphk continue; 56812623Sphk } 56944972Sphk lsp2 = 0; 57044078Sdfr SLIST_FOREACH(oid, lsp, oid_link) { 57144078Sdfr if (oid->oid_number != *name) 57212623Sphk continue; 57312131Sphk 57412623Sphk if (req->oldidx) 57512623Sphk error = SYSCTL_OUT(req, ".", 1); 57612623Sphk if (!error) 57744078Sdfr error = SYSCTL_OUT(req, oid->oid_name, 57844078Sdfr strlen(oid->oid_name)); 57912623Sphk if (error) 58012623Sphk return (error); 58112623Sphk 58212623Sphk namelen--; 58312623Sphk name++; 58412623Sphk 58544972Sphk if ((oid->oid_kind & CTLTYPE) != CTLTYPE_NODE) 58612623Sphk break; 58712623Sphk 58844078Sdfr if (oid->oid_handler) 58912623Sphk break; 59012623Sphk 59144972Sphk lsp2 = (struct sysctl_oid_list *)oid->oid_arg1; 59212623Sphk break; 59312623Sphk } 59444972Sphk lsp = lsp2; 59512623Sphk } 59612623Sphk return (SYSCTL_OUT(req, "", 1)); 59712623Sphk} 59812623Sphk 599141626Sphkstatic SYSCTL_NODE(_sysctl, 1, name, CTLFLAG_RD, sysctl_sysctl_name, ""); 60012623Sphk 60112623Sphkstatic int 60263978Spetersysctl_sysctl_next_ls(struct sysctl_oid_list *lsp, int *name, u_int namelen, 60344078Sdfr int *next, int *len, int level, struct sysctl_oid **oidpp) 60412623Sphk{ 60544078Sdfr struct sysctl_oid *oidp; 60612623Sphk 60712623Sphk *len = level; 60844078Sdfr SLIST_FOREACH(oidp, lsp, oid_link) { 60944078Sdfr *next = oidp->oid_number; 61044078Sdfr *oidpp = oidp; 61112623Sphk 612101650Smux if (oidp->oid_kind & CTLFLAG_SKIP) 613101650Smux continue; 614101650Smux 61512623Sphk if (!namelen) { 61644078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 617139483Spjd return (0); 61844078Sdfr if (oidp->oid_handler) 61912623Sphk /* We really should call the handler here...*/ 620139483Spjd return (0); 62144078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 62263978Speter if (!sysctl_sysctl_next_ls(lsp, 0, 0, next+1, 62344078Sdfr len, level+1, oidpp)) 624139483Spjd return (0); 625111260Srwatson goto emptynode; 62612623Sphk } 62712623Sphk 62844078Sdfr if (oidp->oid_number < *name) 62912623Sphk continue; 63012623Sphk 63144078Sdfr if (oidp->oid_number > *name) { 63244078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 633139483Spjd return (0); 63444078Sdfr if (oidp->oid_handler) 635139483Spjd return (0); 63644078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 63763978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, 63844078Sdfr next+1, len, level+1, oidpp)) 63912623Sphk return (0); 64015241Sphk goto next; 64112623Sphk } 64244078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 64312623Sphk continue; 64412623Sphk 64544078Sdfr if (oidp->oid_handler) 64612623Sphk continue; 64712623Sphk 64844078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 64963978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, next+1, 65044078Sdfr len, level+1, oidpp)) 65112623Sphk return (0); 65215241Sphk next: 65312623Sphk namelen = 1; 654111260Srwatson emptynode: 65512623Sphk *len = level; 65612623Sphk } 657139483Spjd return (1); 65812623Sphk} 65912623Sphk 66012623Sphkstatic int 66162573Sphksysctl_sysctl_next(SYSCTL_HANDLER_ARGS) 66212623Sphk{ 66312623Sphk int *name = (int *) arg1; 66412623Sphk u_int namelen = arg2; 66512623Sphk int i, j, error; 66612623Sphk struct sysctl_oid *oid; 66744078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 66812623Sphk int newoid[CTL_MAXNAME]; 66912623Sphk 67063978Speter i = sysctl_sysctl_next_ls(lsp, name, namelen, newoid, &j, 1, &oid); 67112623Sphk if (i) 672139483Spjd return (ENOENT); 67312650Sphk error = SYSCTL_OUT(req, newoid, j * sizeof (int)); 67412623Sphk return (error); 67512623Sphk} 67612623Sphk 677141626Sphkstatic SYSCTL_NODE(_sysctl, 2, next, CTLFLAG_RD, sysctl_sysctl_next, ""); 67812623Sphk 67912623Sphkstatic int 68044078Sdfrname2oid (char *name, int *oid, int *len, struct sysctl_oid **oidpp) 68112623Sphk{ 68244078Sdfr int i; 68344078Sdfr struct sysctl_oid *oidp; 68444078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 68512623Sphk char *p; 68612623Sphk 68712623Sphk if (!*name) 688139483Spjd return (ENOENT); 68912623Sphk 69012623Sphk p = name + strlen(name) - 1 ; 69112623Sphk if (*p == '.') 69212623Sphk *p = '\0'; 69312623Sphk 69412623Sphk *len = 0; 69512623Sphk 69612623Sphk for (p = name; *p && *p != '.'; p++) 69712623Sphk ; 69812623Sphk i = *p; 69912623Sphk if (i == '.') 70012623Sphk *p = '\0'; 70112623Sphk 70244078Sdfr oidp = SLIST_FIRST(lsp); 70312623Sphk 70444078Sdfr while (oidp && *len < CTL_MAXNAME) { 70544078Sdfr if (strcmp(name, oidp->oid_name)) { 70644078Sdfr oidp = SLIST_NEXT(oidp, oid_link); 70712623Sphk continue; 70812623Sphk } 70944078Sdfr *oid++ = oidp->oid_number; 71012623Sphk (*len)++; 71112623Sphk 71212623Sphk if (!i) { 71344078Sdfr if (oidpp) 71444078Sdfr *oidpp = oidp; 71512623Sphk return (0); 71612623Sphk } 71712623Sphk 71844078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 71912623Sphk break; 72012623Sphk 72144078Sdfr if (oidp->oid_handler) 72212623Sphk break; 72312623Sphk 72444078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 72544078Sdfr oidp = SLIST_FIRST(lsp); 72612623Sphk name = p+1; 72712623Sphk for (p = name; *p && *p != '.'; p++) 72812623Sphk ; 72912623Sphk i = *p; 73012623Sphk if (i == '.') 73112623Sphk *p = '\0'; 73212623Sphk } 733139483Spjd return (ENOENT); 73412623Sphk} 73512623Sphk 73612623Sphkstatic int 73762573Sphksysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) 73812623Sphk{ 73912623Sphk char *p; 74012623Sphk int error, oid[CTL_MAXNAME], len; 74112623Sphk struct sysctl_oid *op = 0; 74212623Sphk 74312623Sphk if (!req->newlen) 744139483Spjd return (ENOENT); 74545140Sphk if (req->newlen >= MAXPATHLEN) /* XXX arbitrary, undocumented */ 74645140Sphk return (ENAMETOOLONG); 74712623Sphk 748111119Simp p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); 74912623Sphk 75012623Sphk error = SYSCTL_IN(req, p, req->newlen); 75112623Sphk if (error) { 75212623Sphk free(p, M_SYSCTL); 75312623Sphk return (error); 75412623Sphk } 75512623Sphk 75612623Sphk p [req->newlen] = '\0'; 75712623Sphk 75812623Sphk error = name2oid(p, oid, &len, &op); 75912623Sphk 76012623Sphk free(p, M_SYSCTL); 76112623Sphk 76212623Sphk if (error) 76312623Sphk return (error); 76412623Sphk 76512650Sphk error = SYSCTL_OUT(req, oid, len * sizeof *oid); 76612623Sphk return (error); 76712623Sphk} 76812623Sphk 76912910SphkSYSCTL_PROC(_sysctl, 3, name2oid, CTLFLAG_RW|CTLFLAG_ANYBODY, 0, 0, 77012623Sphk sysctl_sysctl_name2oid, "I", ""); 77112623Sphk 77212623Sphkstatic int 77362573Sphksysctl_sysctl_oidfmt(SYSCTL_HANDLER_ARGS) 77412623Sphk{ 77544078Sdfr struct sysctl_oid *oid; 77653977Sgreen int error; 77712623Sphk 77853977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); 77953977Sgreen if (error) 78053977Sgreen return (error); 78112623Sphk 78244078Sdfr if (!oid->oid_fmt) 78353977Sgreen return (ENOENT); 78453977Sgreen error = SYSCTL_OUT(req, &oid->oid_kind, sizeof(oid->oid_kind)); 78553977Sgreen if (error) 78653977Sgreen return (error); 78753977Sgreen error = SYSCTL_OUT(req, oid->oid_fmt, strlen(oid->oid_fmt) + 1); 78812650Sphk return (error); 78912623Sphk} 79012623Sphk 79142467Sphk 792141626Sphkstatic SYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, ""); 79312623Sphk 79488006Sluigistatic int 79588006Sluigisysctl_sysctl_oiddescr(SYSCTL_HANDLER_ARGS) 79688006Sluigi{ 79788006Sluigi struct sysctl_oid *oid; 79888006Sluigi int error; 79988006Sluigi 80088006Sluigi error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); 80188006Sluigi if (error) 80288006Sluigi return (error); 80388006Sluigi 804141433Sphk if (!oid->oid_descr) 80588006Sluigi return (ENOENT); 806141433Sphk error = SYSCTL_OUT(req, oid->oid_descr, strlen(oid->oid_descr) + 1); 80788006Sluigi return (error); 80888006Sluigi} 80988006Sluigi 810141626Sphkstatic SYSCTL_NODE(_sysctl, 5, oiddescr, CTLFLAG_RD, sysctl_sysctl_oiddescr, ""); 81188006Sluigi 81212243Sphk/* 81312623Sphk * Default "handler" functions. 81412623Sphk */ 81512623Sphk 81612623Sphk/* 81742095Sdfr * Handle an int, signed or unsigned. 81812243Sphk * Two cases: 81912243Sphk * a variable: point arg1 at it. 82012243Sphk * a constant: pass it in arg2. 82112243Sphk */ 82212243Sphk 82311865Sphkint 82462573Sphksysctl_handle_int(SYSCTL_HANDLER_ARGS) 82511863Sphk{ 826100833Struckman int tmpout, error = 0; 82711863Sphk 828100833Struckman /* 829100833Struckman * Attempt to get a coherent snapshot by making a copy of the data. 830100833Struckman */ 83112243Sphk if (arg1) 832100833Struckman tmpout = *(int *)arg1; 83320506Sbde else 834100833Struckman tmpout = arg2; 835100833Struckman error = SYSCTL_OUT(req, &tmpout, sizeof(int)); 83611863Sphk 83712243Sphk if (error || !req->newptr) 83812243Sphk return (error); 83911863Sphk 84012243Sphk if (!arg1) 84112243Sphk error = EPERM; 84212243Sphk else 84312243Sphk error = SYSCTL_IN(req, arg1, sizeof(int)); 84412243Sphk return (error); 84511863Sphk} 84611863Sphk 847155758Sandre 84812243Sphk/* 849155758Sandre * Based on on sysctl_handle_int() convert milliseconds into ticks. 850155758Sandre */ 851155758Sandre 852155758Sandreint 853155758Sandresysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS) 854155758Sandre{ 855155758Sandre int error, s, tt; 856155758Sandre 857155758Sandre tt = *(int *)oidp->oid_arg1; 858155758Sandre s = (int)((int64_t)tt * 1000 / hz); 859155758Sandre 860155758Sandre error = sysctl_handle_int(oidp, &s, 0, req); 861155758Sandre if (error || !req->newptr) 862155758Sandre return (error); 863155758Sandre 864155758Sandre tt = (int)((int64_t)s * hz / 1000); 865155758Sandre if (tt < 1) 866155758Sandre return (EINVAL); 867155758Sandre 868155758Sandre *(int *)oidp->oid_arg1 = tt; 869155758Sandre return (0); 870155758Sandre} 871155758Sandre 872155758Sandre 873155758Sandre/* 87445140Sphk * Handle a long, signed or unsigned. arg1 points to it. 87538517Sdfr */ 87638517Sdfr 87738517Sdfrint 87862573Sphksysctl_handle_long(SYSCTL_HANDLER_ARGS) 87938517Sdfr{ 88038517Sdfr int error = 0; 881136404Speter long tmplong; 882136404Speter#ifdef SCTL_MASK32 883136404Speter int tmpint; 884136404Speter#endif 88538517Sdfr 886100833Struckman /* 887100833Struckman * Attempt to get a coherent snapshot by making a copy of the data. 888100833Struckman */ 88945140Sphk if (!arg1) 89045140Sphk return (EINVAL); 891136404Speter tmplong = *(long *)arg1; 892136404Speter#ifdef SCTL_MASK32 893136404Speter if (req->flags & SCTL_MASK32) { 894136404Speter tmpint = tmplong; 895136404Speter error = SYSCTL_OUT(req, &tmpint, sizeof(int)); 896136404Speter } else 897136404Speter#endif 898136404Speter error = SYSCTL_OUT(req, &tmplong, sizeof(long)); 89938517Sdfr 90038517Sdfr if (error || !req->newptr) 90138517Sdfr return (error); 90238517Sdfr 903136404Speter#ifdef SCTL_MASK32 904136404Speter if (req->flags & SCTL_MASK32) { 905136404Speter error = SYSCTL_IN(req, &tmpint, sizeof(int)); 906136404Speter *(long *)arg1 = (long)tmpint; 907136404Speter } else 908136404Speter#endif 909136404Speter error = SYSCTL_IN(req, arg1, sizeof(long)); 91038517Sdfr return (error); 91138517Sdfr} 91238517Sdfr 91338517Sdfr/* 914170288Sdwmalone * Handle a 64 bit int, signed or unsigned. arg1 points to it. 915170288Sdwmalone */ 916170288Sdwmalone 917170288Sdwmaloneint 918170288Sdwmalonesysctl_handle_quad(SYSCTL_HANDLER_ARGS) 919170288Sdwmalone{ 920170288Sdwmalone int error = 0; 921170288Sdwmalone uint64_t tmpout; 922170288Sdwmalone 923170288Sdwmalone /* 924170288Sdwmalone * Attempt to get a coherent snapshot by making a copy of the data. 925170288Sdwmalone */ 926170288Sdwmalone if (!arg1) 927170288Sdwmalone return (EINVAL); 928170288Sdwmalone tmpout = *(uint64_t *)arg1; 929170288Sdwmalone error = SYSCTL_OUT(req, &tmpout, sizeof(uint64_t)); 930170288Sdwmalone 931170288Sdwmalone if (error || !req->newptr) 932170288Sdwmalone return (error); 933170288Sdwmalone 934170288Sdwmalone error = SYSCTL_IN(req, arg1, sizeof(uint64_t)); 935170288Sdwmalone return (error); 936170288Sdwmalone} 937170288Sdwmalone 938170288Sdwmalone/* 93912243Sphk * Handle our generic '\0' terminated 'C' string. 94012243Sphk * Two cases: 94112243Sphk * a variable string: point arg1 at it, arg2 is max length. 94212243Sphk * a constant string: point arg1 at it, arg2 is zero. 94312243Sphk */ 94412243Sphk 94511865Sphkint 94662573Sphksysctl_handle_string(SYSCTL_HANDLER_ARGS) 94711863Sphk{ 94812243Sphk int error=0; 949100833Struckman char *tmparg; 950100833Struckman size_t outlen; 95111863Sphk 952100833Struckman /* 953100833Struckman * Attempt to get a coherent snapshot by copying to a 954100833Struckman * temporary kernel buffer. 955100833Struckman */ 956100833Struckmanretry: 957100833Struckman outlen = strlen((char *)arg1)+1; 958111119Simp tmparg = malloc(outlen, M_SYSCTLTMP, M_WAITOK); 959105354Srobert 960105354Srobert if (strlcpy(tmparg, (char *)arg1, outlen) >= outlen) { 961100833Struckman free(tmparg, M_SYSCTLTMP); 962100833Struckman goto retry; 963100833Struckman } 964105354Srobert 965100833Struckman error = SYSCTL_OUT(req, tmparg, outlen); 966100833Struckman free(tmparg, M_SYSCTLTMP); 96711863Sphk 96845140Sphk if (error || !req->newptr) 96912243Sphk return (error); 97011863Sphk 97145140Sphk if ((req->newlen - req->newidx) >= arg2) { 97245140Sphk error = EINVAL; 97312243Sphk } else { 97412243Sphk arg2 = (req->newlen - req->newidx); 97512243Sphk error = SYSCTL_IN(req, arg1, arg2); 97612243Sphk ((char *)arg1)[arg2] = '\0'; 97711863Sphk } 97812131Sphk 97912131Sphk return (error); 98011863Sphk} 98111863Sphk 98212243Sphk/* 98312243Sphk * Handle any kind of opaque data. 98412243Sphk * arg1 points to it, arg2 is the size. 98512243Sphk */ 98612243Sphk 98711865Sphkint 98862573Sphksysctl_handle_opaque(SYSCTL_HANDLER_ARGS) 98911863Sphk{ 990120803Sbms int error, tries; 991120803Sbms u_int generation; 992120813Sbms struct sysctl_req req2; 99312243Sphk 994100833Struckman /* 995120803Sbms * Attempt to get a coherent snapshot, by using the thread 996120803Sbms * pre-emption counter updated from within mi_switch() to 997120803Sbms * determine if we were pre-empted during a bcopy() or 998120803Sbms * copyout(). Make 3 attempts at doing this before giving up. 999120803Sbms * If we encounter an error, stop immediately. 1000100833Struckman */ 1001120803Sbms tries = 0; 1002120813Sbms req2 = *req; 1003120813Sbmsretry: 1004120813Sbms generation = curthread->td_generation; 1005120813Sbms error = SYSCTL_OUT(req, arg1, arg2); 1006120813Sbms if (error) 1007120813Sbms return (error); 1008120813Sbms tries++; 1009120813Sbms if (generation != curthread->td_generation && tries < 3) { 1010120813Sbms *req = req2; 1011120813Sbms goto retry; 1012120813Sbms } 101312243Sphk 101412243Sphk error = SYSCTL_IN(req, arg1, arg2); 101512243Sphk 101612243Sphk return (error); 101712243Sphk} 101812243Sphk 101912260Sphk/* 102012260Sphk * Transfer functions to/from kernel space. 102112260Sphk * XXX: rather untested at this point 102212260Sphk */ 102312260Sphkstatic int 102438517Sdfrsysctl_old_kernel(struct sysctl_req *req, const void *p, size_t l) 102512243Sphk{ 102638517Sdfr size_t i = 0; 102712260Sphk 102812260Sphk if (req->oldptr) { 102938517Sdfr i = l; 103073971Stmm if (req->oldlen <= req->oldidx) 103173971Stmm i = 0; 103273971Stmm else 103373971Stmm if (i > req->oldlen - req->oldidx) 103473971Stmm i = req->oldlen - req->oldidx; 103512260Sphk if (i > 0) 103617971Sbde bcopy(p, (char *)req->oldptr + req->oldidx, i); 103712243Sphk } 103812260Sphk req->oldidx += l; 103916282Snate if (req->oldptr && i != l) 104011863Sphk return (ENOMEM); 104112260Sphk return (0); 104212243Sphk} 104312243Sphk 104412260Sphkstatic int 104538517Sdfrsysctl_new_kernel(struct sysctl_req *req, void *p, size_t l) 104612243Sphk{ 104712260Sphk if (!req->newptr) 1048139483Spjd return (0); 104912260Sphk if (req->newlen - req->newidx < l) 105011863Sphk return (EINVAL); 105117971Sbde bcopy((char *)req->newptr + req->newidx, p, l); 105212243Sphk req->newidx += l; 105312131Sphk return (0); 105411863Sphk} 105511863Sphk 105616282Snateint 105783366Sjuliankernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, 1058136404Speter size_t *oldlenp, void *new, size_t newlen, size_t *retval, int flags) 105916282Snate{ 106016282Snate int error = 0; 106116282Snate struct sysctl_req req; 106216282Snate 106316282Snate bzero(&req, sizeof req); 106416282Snate 106586183Srwatson req.td = td; 1066136404Speter req.flags = flags; 106716282Snate 106816282Snate if (oldlenp) { 106916282Snate req.oldlen = *oldlenp; 107016282Snate } 1071127052Struckman req.validlen = req.oldlen; 107216282Snate 107316282Snate if (old) { 107416282Snate req.oldptr= old; 107516282Snate } 107616282Snate 107777646Sdd if (new != NULL) { 107816282Snate req.newlen = newlen; 107916282Snate req.newptr = new; 108016282Snate } 108116282Snate 108216282Snate req.oldfunc = sysctl_old_kernel; 108316282Snate req.newfunc = sysctl_new_kernel; 1084120781Sbms req.lock = REQ_LOCKED; 108516282Snate 108693625Srwatson SYSCTL_LOCK(); 108716282Snate 108816282Snate error = sysctl_root(0, name, namelen, &req); 1089120813Sbms 1090127052Struckman if (req.lock == REQ_WIRED && req.validlen > 0) 1091127052Struckman vsunlock(req.oldptr, req.validlen); 109216282Snate 109393625Srwatson SYSCTL_UNLOCK(); 109416282Snate 109516282Snate if (error && error != ENOMEM) 109616282Snate return (error); 109716282Snate 109816282Snate if (retval) { 1099127052Struckman if (req.oldptr && req.oldidx > req.validlen) 1100127052Struckman *retval = req.validlen; 110116282Snate else 110216282Snate *retval = req.oldidx; 110316282Snate } 110416282Snate return (error); 110516282Snate} 110616282Snate 110776834Sjlemonint 110883366Sjuliankernel_sysctlbyname(struct thread *td, char *name, void *old, size_t *oldlenp, 1109136404Speter void *new, size_t newlen, size_t *retval, int flags) 111076834Sjlemon{ 111176834Sjlemon int oid[CTL_MAXNAME]; 111278620Smjacob size_t oidlen, plen; 111378620Smjacob int error; 111476834Sjlemon 111576834Sjlemon oid[0] = 0; /* sysctl internal magic */ 111676834Sjlemon oid[1] = 3; /* name2oid */ 111776834Sjlemon oidlen = sizeof(oid); 111876834Sjlemon 111983366Sjulian error = kernel_sysctl(td, oid, 2, oid, &oidlen, 1120136404Speter (void *)name, strlen(name), &plen, flags); 112176834Sjlemon if (error) 112276834Sjlemon return (error); 112376834Sjlemon 112483366Sjulian error = kernel_sysctl(td, oid, plen / sizeof(int), old, oldlenp, 1125136404Speter new, newlen, retval, flags); 112676834Sjlemon return (error); 112776834Sjlemon} 112876834Sjlemon 112912260Sphk/* 113012260Sphk * Transfer function to/from user space. 113112260Sphk */ 113212260Sphkstatic int 113338517Sdfrsysctl_old_user(struct sysctl_req *req, const void *p, size_t l) 113412243Sphk{ 113538517Sdfr int error = 0; 1136126253Struckman size_t i, len, origidx; 113712243Sphk 1138126253Struckman origidx = req->oldidx; 1139126253Struckman req->oldidx += l; 1140126253Struckman if (req->oldptr == NULL) 1141126253Struckman return (0); 1142148864Scsjp /* 1143148864Scsjp * If we have not wired the user supplied buffer and we are currently 1144148864Scsjp * holding locks, drop a witness warning, as it's possible that 1145148864Scsjp * write operations to the user page can sleep. 1146148864Scsjp */ 1147148864Scsjp if (req->lock != REQ_WIRED) 1148111883Sjhb WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1149111883Sjhb "sysctl_old_user()"); 1150126253Struckman i = l; 1151127052Struckman len = req->validlen; 1152126253Struckman if (len <= origidx) 1153126253Struckman i = 0; 1154126253Struckman else { 1155126253Struckman if (i > len - origidx) 1156126253Struckman i = len - origidx; 1157126253Struckman error = copyout(p, (char *)req->oldptr + origidx, i); 115812260Sphk } 115912243Sphk if (error) 116012243Sphk return (error); 1161126253Struckman if (i < l) 116212243Sphk return (ENOMEM); 116312260Sphk return (0); 116412243Sphk} 116512243Sphk 116612260Sphkstatic int 116738517Sdfrsysctl_new_user(struct sysctl_req *req, void *p, size_t l) 116812243Sphk{ 116912285Sphk int error; 117012260Sphk 117112260Sphk if (!req->newptr) 1172139483Spjd return (0); 117312260Sphk if (req->newlen - req->newidx < l) 117412243Sphk return (EINVAL); 1175148873Scsjp WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1176148873Scsjp "sysctl_new_user()"); 117717971Sbde error = copyin((char *)req->newptr + req->newidx, p, l); 117812243Sphk req->newidx += l; 117912243Sphk return (error); 118012243Sphk} 118112243Sphk 1182100487Struckman/* 1183100487Struckman * Wire the user space destination buffer. If set to a value greater than 1184100487Struckman * zero, the len parameter limits the maximum amount of wired memory. 1185100487Struckman */ 1186126253Struckmanint 1187100487Struckmansysctl_wire_old_buffer(struct sysctl_req *req, size_t len) 1188100487Struckman{ 1189126253Struckman int ret; 1190154792Struckman size_t i, wiredlen; 1191154792Struckman char *cp, dummy; 1192126253Struckman 1193126253Struckman wiredlen = (len > 0 && len < req->oldlen) ? len : req->oldlen; 1194126253Struckman ret = 0; 1195120781Sbms if (req->lock == REQ_LOCKED && req->oldptr && 1196120781Sbms req->oldfunc == sysctl_old_user) { 1197127050Struckman if (wiredlen != 0) { 1198127050Struckman ret = vslock(req->oldptr, wiredlen); 1199130327Sgreen if (ret != 0) { 1200130327Sgreen if (ret != ENOMEM) 1201130327Sgreen return (ret); 1202130327Sgreen wiredlen = 0; 1203130327Sgreen } 1204154792Struckman /* 1205154792Struckman * Touch all the wired pages to avoid PTE modified 1206154792Struckman * bit emulation traps on Alpha while holding locks 1207154792Struckman * in the sysctl handler. 1208154792Struckman */ 1209154792Struckman for (i = (wiredlen + PAGE_SIZE - 1) / PAGE_SIZE, 1210154792Struckman cp = req->oldptr; i > 0; i--, cp += PAGE_SIZE) { 1211154792Struckman copyin(cp, &dummy, 1); 1212154792Struckman copyout(&dummy, cp, 1); 1213154792Struckman } 1214126253Struckman } 1215127050Struckman req->lock = REQ_WIRED; 1216127052Struckman req->validlen = wiredlen; 1217100487Struckman } 1218127050Struckman return (0); 1219100487Struckman} 1220100487Struckman 12211541Srgrimesint 122253977Sgreensysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 122353977Sgreen int *nindx, struct sysctl_req *req) 122412131Sphk{ 122544078Sdfr struct sysctl_oid *oid; 122653977Sgreen int indx; 122712131Sphk 122853977Sgreen oid = SLIST_FIRST(&sysctl__children); 122912131Sphk indx = 0; 123044078Sdfr while (oid && indx < CTL_MAXNAME) { 123144078Sdfr if (oid->oid_number == name[indx]) { 123212131Sphk indx++; 123344078Sdfr if (oid->oid_kind & CTLFLAG_NOLOCK) 1234120781Sbms req->lock = REQ_UNLOCKED; 123544078Sdfr if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 123653977Sgreen if (oid->oid_handler != NULL || 123753977Sgreen indx == namelen) { 123853977Sgreen *noid = oid; 123953977Sgreen if (nindx != NULL) 124053977Sgreen *nindx = indx; 124153977Sgreen return (0); 124253977Sgreen } 124353977Sgreen oid = SLIST_FIRST( 124453977Sgreen (struct sysctl_oid_list *)oid->oid_arg1); 124553977Sgreen } else if (indx == namelen) { 124653977Sgreen *noid = oid; 124753977Sgreen if (nindx != NULL) 124853977Sgreen *nindx = indx; 124953977Sgreen return (0); 125012131Sphk } else { 125153977Sgreen return (ENOTDIR); 125212131Sphk } 125312131Sphk } else { 125444078Sdfr oid = SLIST_NEXT(oid, oid_link); 125512131Sphk } 125612131Sphk } 125753977Sgreen return (ENOENT); 125853977Sgreen} 125953977Sgreen 126053977Sgreen/* 126153977Sgreen * Traverse our tree, and find the right node, execute whatever it points 126253977Sgreen * to, and return the resulting error code. 126353977Sgreen */ 126453977Sgreen 1265104094Sphkstatic int 126662573Sphksysctl_root(SYSCTL_HANDLER_ARGS) 126753977Sgreen{ 126853977Sgreen struct sysctl_oid *oid; 1269109246Sdillon int error, indx, lvl; 127053977Sgreen 127153977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, &indx, req); 127253977Sgreen if (error) 127353977Sgreen return (error); 127453977Sgreen 127553977Sgreen if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 127653977Sgreen /* 127753977Sgreen * You can't call a sysctl when it's a node, but has 127853977Sgreen * no handler. Inform the user that it's a node. 127953977Sgreen * The indx may or may not be the same as namelen. 128053977Sgreen */ 128153977Sgreen if (oid->oid_handler == NULL) 128253977Sgreen return (EISDIR); 128353977Sgreen } 128453977Sgreen 128583968Srwatson /* Is this sysctl writable? */ 128683968Srwatson if (req->newptr && !(oid->oid_kind & CTLFLAG_WR)) 128712131Sphk return (EPERM); 128812131Sphk 128992953Srwatson KASSERT(req->td != NULL, ("sysctl_root(): req->td == NULL")); 129092953Srwatson 129183968Srwatson /* Is this sysctl sensitive to securelevels? */ 129283968Srwatson if (req->newptr && (oid->oid_kind & CTLFLAG_SECURE)) { 1293109246Sdillon lvl = (oid->oid_kind & CTLMASK_SECURE) >> CTLSHIFT_SECURE; 1294109246Sdillon error = securelevel_gt(req->td->td_ucred, lvl); 129592953Srwatson if (error) 129692953Srwatson return (error); 129783968Srwatson } 129812910Sphk 129983968Srwatson /* Is this sysctl writable by only privileged users? */ 130083968Srwatson if (req->newptr && !(oid->oid_kind & CTLFLAG_ANYBODY)) { 130192953Srwatson if (oid->oid_kind & CTLFLAG_PRISON) 1302170587Srwatson error = priv_check(req->td, PRIV_SYSCTL_WRITEJAIL); 130392953Srwatson else 1304164033Srwatson error = priv_check(req->td, PRIV_SYSCTL_WRITE); 130592953Srwatson if (error) 130692953Srwatson return (error); 130783968Srwatson } 130883968Srwatson 130944078Sdfr if (!oid->oid_handler) 1310139483Spjd return (EINVAL); 131112131Sphk 1312126121Spjd if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 1313132776Skan arg1 = (int *)arg1 + indx; 1314126121Spjd arg2 -= indx; 1315126121Spjd } else { 1316126121Spjd arg1 = oid->oid_arg1; 1317126121Spjd arg2 = oid->oid_arg2; 1318126121Spjd } 1319126121Spjd#ifdef MAC 1320172930Srwatson error = mac_system_check_sysctl(req->td->td_ucred, oid, arg1, arg2, 1321126121Spjd req); 1322126121Spjd if (error != 0) 1323126121Spjd return (error); 1324126121Spjd#endif 1325126121Spjd error = oid->oid_handler(oid, arg1, arg2, req); 1326126121Spjd 132753977Sgreen return (error); 132812131Sphk} 132912131Sphk 133012221Sbde#ifndef _SYS_SYSPROTO_H_ 133112171Sphkstruct sysctl_args { 133212171Sphk int *name; 133312171Sphk u_int namelen; 133412171Sphk void *old; 133512171Sphk size_t *oldlenp; 133612171Sphk void *new; 133712171Sphk size_t newlen; 133812171Sphk}; 133912221Sbde#endif 134012131Sphkint 134183366Sjulian__sysctl(struct thread *td, struct sysctl_args *uap) 13421541Srgrimes{ 134382746Sdillon int error, name[CTL_MAXNAME]; 134438517Sdfr size_t j; 13451541Srgrimes 13461541Srgrimes if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) 13471541Srgrimes return (EINVAL); 134811863Sphk 13493308Sphk error = copyin(uap->name, &name, uap->namelen * sizeof(int)); 13503308Sphk if (error) 13511541Srgrimes return (error); 13521541Srgrimes 135382746Sdillon mtx_lock(&Giant); 135482746Sdillon 135583366Sjulian error = userland_sysctl(td, name, uap->namelen, 135612171Sphk uap->old, uap->oldlenp, 0, 1357136404Speter uap->new, uap->newlen, &j, 0); 135812260Sphk if (error && error != ENOMEM) 135982746Sdillon goto done2; 136012260Sphk if (uap->oldlenp) { 136182746Sdillon int i = copyout(&j, uap->oldlenp, sizeof(j)); 136212260Sphk if (i) 136382746Sdillon error = i; 136412260Sphk } 136582746Sdillondone2: 136682746Sdillon mtx_unlock(&Giant); 136712260Sphk return (error); 136812171Sphk} 136912171Sphk 137012171Sphk/* 137112171Sphk * This is used from various compatibility syscalls too. That's why name 137212171Sphk * must be in kernel space. 137312171Sphk */ 137412171Sphkint 137583366Sjulianuserland_sysctl(struct thread *td, int *name, u_int namelen, void *old, 1376136404Speter size_t *oldlenp, int inkernel, void *new, size_t newlen, size_t *retval, 1377136404Speter int flags) 137812171Sphk{ 137912429Sphk int error = 0; 1380127052Struckman struct sysctl_req req; 138112171Sphk 138212243Sphk bzero(&req, sizeof req); 138312243Sphk 138486183Srwatson req.td = td; 1385136404Speter req.flags = flags; 138612285Sphk 138712171Sphk if (oldlenp) { 138812171Sphk if (inkernel) { 138912243Sphk req.oldlen = *oldlenp; 139012171Sphk } else { 139112260Sphk error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); 139212171Sphk if (error) 139312171Sphk return (error); 139412171Sphk } 139512171Sphk } 1396127052Struckman req.validlen = req.oldlen; 139712171Sphk 139812243Sphk if (old) { 139952644Sphk if (!useracc(old, req.oldlen, VM_PROT_WRITE)) 140012243Sphk return (EFAULT); 140112243Sphk req.oldptr= old; 140212243Sphk } 140312131Sphk 140477646Sdd if (new != NULL) { 1405172038Srwatson if (!useracc(new, newlen, VM_PROT_READ)) 140612243Sphk return (EFAULT); 140712243Sphk req.newlen = newlen; 140812243Sphk req.newptr = new; 140911863Sphk } 141012131Sphk 141112243Sphk req.oldfunc = sysctl_old_user; 141212243Sphk req.newfunc = sysctl_new_user; 1413120781Sbms req.lock = REQ_LOCKED; 141411863Sphk 141593625Srwatson SYSCTL_LOCK(); 141612429Sphk 141716159Sphk do { 1418127052Struckman req.oldidx = 0; 1419127052Struckman req.newidx = 0; 1420127052Struckman error = sysctl_root(0, name, namelen, &req); 142116159Sphk } while (error == EAGAIN); 142212243Sphk 1423127052Struckman if (req.lock == REQ_WIRED && req.validlen > 0) 1424127052Struckman vsunlock(req.oldptr, req.validlen); 142512429Sphk 142693625Srwatson SYSCTL_UNLOCK(); 142712429Sphk 142812260Sphk if (error && error != ENOMEM) 142912260Sphk return (error); 143012260Sphk 143112260Sphk if (retval) { 1432127052Struckman if (req.oldptr && req.oldidx > req.validlen) 1433127052Struckman *retval = req.validlen; 143412260Sphk else 143512260Sphk *retval = req.oldidx; 143611863Sphk } 143712260Sphk return (error); 14381541Srgrimes} 14391541Srgrimes 14401541Srgrimes#ifdef COMPAT_43 14411541Srgrimes#include <sys/socket.h> 144215103Sphk#include <vm/vm_param.h> 144315103Sphk 14441541Srgrimes#define KINFO_PROC (0<<8) 14451541Srgrimes#define KINFO_RT (1<<8) 14461541Srgrimes#define KINFO_VNODE (2<<8) 14471541Srgrimes#define KINFO_FILE (3<<8) 14481541Srgrimes#define KINFO_METER (4<<8) 14491541Srgrimes#define KINFO_LOADAVG (5<<8) 14501541Srgrimes#define KINFO_CLOCKRATE (6<<8) 14511541Srgrimes 14529455Speter/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 14539455Speter#define KINFO_BSDI_SYSINFO (101<<8) 14549455Speter 14559455Speter/* 14569455Speter * XXX this is bloat, but I hope it's better here than on the potentially 14579455Speter * limited kernel stack... -Peter 14589455Speter */ 14599455Speter 146012819Sphkstatic struct { 14619455Speter int bsdi_machine; /* "i386" on BSD/386 */ 14629455Speter/* ^^^ this is an offset to the string, relative to the struct start */ 14639455Speter char *pad0; 14649455Speter long pad1; 14659455Speter long pad2; 14669455Speter long pad3; 14679455Speter u_long pad4; 14689455Speter u_long pad5; 14699455Speter u_long pad6; 14709455Speter 14719455Speter int bsdi_ostype; /* "BSD/386" on BSD/386 */ 14729455Speter int bsdi_osrelease; /* "1.1" on BSD/386 */ 14739455Speter long pad7; 14749455Speter long pad8; 14759455Speter char *pad9; 14769455Speter 14779455Speter long pad10; 14789455Speter long pad11; 14799455Speter int pad12; 14809455Speter long pad13; 14819455Speter quad_t pad14; 14829455Speter long pad15; 14839455Speter 14849455Speter struct timeval pad16; 14859455Speter /* we dont set this, because BSDI's uname used gethostname() instead */ 14869455Speter int bsdi_hostname; /* hostname on BSD/386 */ 14879455Speter 14889455Speter /* the actual string data is appended here */ 14899455Speter 14909455Speter} bsdi_si; 1491167232Srwatson 14929455Speter/* 14939455Speter * this data is appended to the end of the bsdi_si structure during copyout. 14949455Speter * The "char *" offsets are relative to the base of the bsdi_si struct. 14959455Speter * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 14969455Speter * should not exceed the length of the buffer here... (or else!! :-) 14979455Speter */ 149812819Sphkstatic char bsdi_strings[80]; /* It had better be less than this! */ 14999455Speter 150012221Sbde#ifndef _SYS_SYSPROTO_H_ 15011541Srgrimesstruct getkerninfo_args { 15021541Srgrimes int op; 15031541Srgrimes char *where; 150438864Sbde size_t *size; 15051541Srgrimes int arg; 15061541Srgrimes}; 150712221Sbde#endif 15081549Srgrimesint 150983366Sjulianogetkerninfo(struct thread *td, struct getkerninfo_args *uap) 15101541Srgrimes{ 151112171Sphk int error, name[6]; 151238517Sdfr size_t size; 151382494Speter u_int needed = 0; 15141541Srgrimes 151582746Sdillon mtx_lock(&Giant); 151682746Sdillon 15171541Srgrimes switch (uap->op & 0xff00) { 15181541Srgrimes 15191541Srgrimes case KINFO_RT: 152012171Sphk name[0] = CTL_NET; 152112171Sphk name[1] = PF_ROUTE; 152212171Sphk name[2] = 0; 152312171Sphk name[3] = (uap->op & 0xff0000) >> 16; 152412171Sphk name[4] = uap->op & 0xff; 152512171Sphk name[5] = uap->arg; 152683366Sjulian error = userland_sysctl(td, name, 6, uap->where, uap->size, 1527136417Sphk 0, 0, 0, &size, 0); 15281541Srgrimes break; 15291541Srgrimes 15301541Srgrimes case KINFO_VNODE: 153112171Sphk name[0] = CTL_KERN; 153212171Sphk name[1] = KERN_VNODE; 153383366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1534136417Sphk 0, 0, 0, &size, 0); 15351541Srgrimes break; 15361541Srgrimes 15371541Srgrimes case KINFO_PROC: 153812171Sphk name[0] = CTL_KERN; 153912171Sphk name[1] = KERN_PROC; 154012171Sphk name[2] = uap->op & 0xff; 154112171Sphk name[3] = uap->arg; 154283366Sjulian error = userland_sysctl(td, name, 4, uap->where, uap->size, 1543136417Sphk 0, 0, 0, &size, 0); 15441541Srgrimes break; 15451541Srgrimes 15461541Srgrimes case KINFO_FILE: 154712171Sphk name[0] = CTL_KERN; 154812171Sphk name[1] = KERN_FILE; 154983366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1550136417Sphk 0, 0, 0, &size, 0); 15511541Srgrimes break; 15521541Srgrimes 15531541Srgrimes case KINFO_METER: 155412171Sphk name[0] = CTL_VM; 1555109102Smux name[1] = VM_TOTAL; 155683366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1557136417Sphk 0, 0, 0, &size, 0); 15581541Srgrimes break; 15591541Srgrimes 15601541Srgrimes case KINFO_LOADAVG: 156112171Sphk name[0] = CTL_VM; 156212171Sphk name[1] = VM_LOADAVG; 156383366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1564136417Sphk 0, 0, 0, &size, 0); 15651541Srgrimes break; 15661541Srgrimes 15671541Srgrimes case KINFO_CLOCKRATE: 156812171Sphk name[0] = CTL_KERN; 156912171Sphk name[1] = KERN_CLOCKRATE; 157083366Sjulian error = userland_sysctl(td, name, 2, uap->where, uap->size, 1571136417Sphk 0, 0, 0, &size, 0); 15721541Srgrimes break; 15731541Srgrimes 15749455Speter case KINFO_BSDI_SYSINFO: { 15759455Speter /* 15769455Speter * this is pretty crude, but it's just enough for uname() 15779455Speter * from BSDI's 1.x libc to work. 15789455Speter * 157982494Speter * *size gives the size of the buffer before the call, and 158082494Speter * the amount of data copied after a successful call. 158182494Speter * If successful, the return value is the amount of data 158282494Speter * available, which can be larger than *size. 158382494Speter * 158482494Speter * BSDI's 2.x product apparently fails with ENOMEM if *size 158582494Speter * is too small. 15869455Speter */ 15879455Speter 15889455Speter u_int left; 15899455Speter char *s; 15909455Speter 15919455Speter bzero((char *)&bsdi_si, sizeof(bsdi_si)); 15929455Speter bzero(bsdi_strings, sizeof(bsdi_strings)); 15939455Speter 15949455Speter s = bsdi_strings; 15959455Speter 15969455Speter bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 15979455Speter strcpy(s, ostype); 15989455Speter s += strlen(s) + 1; 15999455Speter 16009455Speter bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 16019455Speter strcpy(s, osrelease); 16029455Speter s += strlen(s) + 1; 16039455Speter 16049455Speter bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 16059455Speter strcpy(s, machine); 16069455Speter s += strlen(s) + 1; 16079455Speter 16089455Speter needed = sizeof(bsdi_si) + (s - bsdi_strings); 16099455Speter 161082494Speter if ((uap->where == NULL) || (uap->size == NULL)) { 16119455Speter /* process is asking how much buffer to supply.. */ 16129455Speter size = needed; 16139455Speter error = 0; 16149455Speter break; 16159455Speter } 16169455Speter 161782494Speter if ((error = copyin(uap->size, &size, sizeof(size))) != 0) 161882494Speter break; 16199455Speter 16209455Speter /* if too much buffer supplied, trim it down */ 16219455Speter if (size > needed) 16229455Speter size = needed; 16239455Speter 16249455Speter /* how much of the buffer is remaining */ 16259455Speter left = size; 16269455Speter 16279455Speter if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 16289455Speter break; 16299455Speter 16309455Speter /* is there any point in continuing? */ 16319455Speter if (left > sizeof(bsdi_si)) { 16329455Speter left -= sizeof(bsdi_si); 16339455Speter error = copyout(&bsdi_strings, 16349455Speter uap->where + sizeof(bsdi_si), left); 16359455Speter } 16369455Speter break; 16379455Speter } 16389455Speter 16391541Srgrimes default: 164082746Sdillon error = EOPNOTSUPP; 164182746Sdillon break; 16421541Srgrimes } 164382746Sdillon if (error == 0) { 164483366Sjulian td->td_retval[0] = needed ? needed : size; 164582746Sdillon if (uap->size) { 164699012Salfred error = copyout(&size, uap->size, sizeof(size)); 164782746Sdillon } 164882746Sdillon } 164982746Sdillon mtx_unlock(&Giant); 16501541Srgrimes return (error); 16511541Srgrimes} 16521541Srgrimes#endif /* COMPAT_43 */ 1653