kern_sysctl.c revision 80339
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 * 3. All advertising materials mentioning features or use of this software 201541Srgrimes * must display the following acknowledgement: 211541Srgrimes * This product includes software developed by the University of 221541Srgrimes * California, Berkeley and its contributors. 231541Srgrimes * 4. Neither the name of the University nor the names of its contributors 241541Srgrimes * may be used to endorse or promote products derived from this software 251541Srgrimes * without specific prior written permission. 261541Srgrimes * 271541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 281541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 291541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 301541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 311541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 321541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 331541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 341541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 351541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 361541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 371541Srgrimes * SUCH DAMAGE. 381541Srgrimes * 391541Srgrimes * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 4050477Speter * $FreeBSD: head/sys/kern/kern_sysctl.c 80339 2001-07-25 17:21:18Z roam $ 411541Srgrimes */ 421541Srgrimes 4331778Seivind#include "opt_compat.h" 4431778Seivind 451541Srgrimes#include <sys/param.h> 4648274Speter#include <sys/systm.h> 4748274Speter#include <sys/kernel.h> 481541Srgrimes#include <sys/sysctl.h> 4912623Sphk#include <sys/malloc.h> 5012662Sdg#include <sys/proc.h> 5115103Sphk#include <sys/sysproto.h> 5212645Sbde#include <vm/vm.h> 5312662Sdg#include <vm/vm_extern.h> 5412645Sbde 5530354Sphkstatic MALLOC_DEFINE(M_SYSCTL, "sysctl", "sysctl internal magic"); 5663212Sabialstatic MALLOC_DEFINE(M_SYSCTLOID, "sysctloid", "sysctl dynamic oids"); 5730309Sphk 5812429Sphk/* 5912429Sphk * Locking and stats 6012429Sphk */ 6112429Sphkstatic struct sysctl_lock { 6212429Sphk int sl_lock; 6312429Sphk int sl_want; 6412429Sphk int sl_locked; 6512429Sphk} memlock; 6612429Sphk 6762573Sphkstatic int sysctl_root(SYSCTL_HANDLER_ARGS); 6812429Sphk 6944078Sdfrstruct sysctl_oid_list sysctl__children; /* root list */ 7012152Sphk 7163212Sabialstatic struct sysctl_oid * 7263212Sabialsysctl_find_oidname(const char *name, struct sysctl_oid_list *list) 7363212Sabial{ 7463212Sabial struct sysctl_oid *oidp; 7563212Sabial 7663212Sabial SLIST_FOREACH(oidp, list, oid_link) { 7763212Sabial if (strcmp(oidp->oid_name, name) == 0) { 7863212Sabial return (oidp); 7963212Sabial } 8063212Sabial } 8163212Sabial return (NULL); 8263212Sabial} 8363212Sabial 8412623Sphk/* 8512623Sphk * Initialization of the MIB tree. 8612623Sphk * 8744078Sdfr * Order by number in each list. 8812623Sphk */ 8912429Sphk 9080338Sroamvoid 9180338Sroamsysctl_register_oid(struct sysctl_oid *oidp) 9212152Sphk{ 9344078Sdfr struct sysctl_oid_list *parent = oidp->oid_parent; 9444078Sdfr struct sysctl_oid *p; 9544078Sdfr struct sysctl_oid *q; 9612197Sbde 9744078Sdfr /* 9863212Sabial * First check if another oid with the same name already 9963212Sabial * exists in the parent's list. 10063212Sabial */ 10163212Sabial p = sysctl_find_oidname(oidp->oid_name, parent); 10263212Sabial if (p != NULL) { 10363212Sabial if ((p->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 10463212Sabial p->oid_refcnt++; 10563212Sabial return; 10663212Sabial } else { 10763212Sabial printf("can't re-use a leaf (%s)!\n", p->oid_name); 10863212Sabial return; 10963212Sabial } 11063212Sabial } 11163212Sabial /* 11244078Sdfr * If this oid has a number OID_AUTO, give it a number which 11380339Sroam * is greater than any current oid. 11480339Sroam * NOTE: DO NOT change the starting value here, change it in 11580339Sroam * <sys/sysctl.h>, and make sure it is at least 256 to 11680339Sroam * accomodate e.g. net.inet.raw as a static sysctl node. 11744078Sdfr */ 11844078Sdfr if (oidp->oid_number == OID_AUTO) { 11980339Sroam static int newoid = CTL_AUTO_START; 12071510Smckusick 12171510Smckusick oidp->oid_number = newoid++; 12271510Smckusick if (newoid == 0x7fffffff) 12371510Smckusick panic("out of oids"); 12480339Sroam } else if (oidp->oid_number >= CTL_AUTO_START) { 12580339Sroam panic("static sysctl oid too high: %d", oidp->oid_number); 12644078Sdfr } 12744078Sdfr 12844078Sdfr /* 12944078Sdfr * Insert the oid into the parent's list in order. 13044078Sdfr */ 13144078Sdfr q = NULL; 13244078Sdfr SLIST_FOREACH(p, parent, oid_link) { 13344078Sdfr if (oidp->oid_number < p->oid_number) 13444078Sdfr break; 13544078Sdfr q = p; 13644078Sdfr } 13744078Sdfr if (q) 13844078Sdfr SLIST_INSERT_AFTER(q, oidp, oid_link); 13944078Sdfr else 14044078Sdfr SLIST_INSERT_HEAD(parent, oidp, oid_link); 14112152Sphk} 14212131Sphk 14380338Sroamvoid 14480338Sroamsysctl_unregister_oid(struct sysctl_oid *oidp) 14512152Sphk{ 14660938Sjake SLIST_REMOVE(oidp->oid_parent, oidp, sysctl_oid, oid_link); 14744078Sdfr} 14812152Sphk 14963212Sabial/* Initialize a new context to keep track of dynamically added sysctls. */ 15063212Sabialint 15163212Sabialsysctl_ctx_init(struct sysctl_ctx_list *c) 15263212Sabial{ 15363212Sabial 15463212Sabial if (c == NULL) { 15563212Sabial return (EINVAL); 15663212Sabial } 15763212Sabial TAILQ_INIT(c); 15863212Sabial return (0); 15963212Sabial} 16063212Sabial 16163212Sabial/* Free the context, and destroy all dynamic oids registered in this context */ 16263212Sabialint 16363212Sabialsysctl_ctx_free(struct sysctl_ctx_list *clist) 16463212Sabial{ 16563212Sabial struct sysctl_ctx_entry *e, *e1; 16663212Sabial int error; 16763212Sabial 16863212Sabial error = 0; 16963212Sabial /* 17063212Sabial * First perform a "dry run" to check if it's ok to remove oids. 17163212Sabial * XXX FIXME 17263212Sabial * XXX This algorithm is a hack. But I don't know any 17363212Sabial * XXX better solution for now... 17463212Sabial */ 17563212Sabial TAILQ_FOREACH(e, clist, link) { 17663212Sabial error = sysctl_remove_oid(e->entry, 0, 0); 17763212Sabial if (error) 17863212Sabial break; 17963212Sabial } 18063212Sabial /* 18163212Sabial * Restore deregistered entries, either from the end, 18263212Sabial * or from the place where error occured. 18363212Sabial * e contains the entry that was not unregistered 18463212Sabial */ 18563212Sabial if (error) 18663212Sabial e1 = TAILQ_PREV(e, sysctl_ctx_list, link); 18763212Sabial else 18863212Sabial e1 = TAILQ_LAST(clist, sysctl_ctx_list); 18963212Sabial while (e1 != NULL) { 19063212Sabial sysctl_register_oid(e1->entry); 19163212Sabial e1 = TAILQ_PREV(e1, sysctl_ctx_list, link); 19263212Sabial } 19363212Sabial if (error) 19463212Sabial return(EBUSY); 19563212Sabial /* Now really delete the entries */ 19663212Sabial e = TAILQ_FIRST(clist); 19763212Sabial while (e != NULL) { 19863212Sabial e1 = TAILQ_NEXT(e, link); 19963212Sabial error = sysctl_remove_oid(e->entry, 1, 0); 20063212Sabial if (error) 20163212Sabial panic("sysctl_remove_oid: corrupt tree, entry: %s", 20263212Sabial e->entry->oid_name); 20363212Sabial free(e, M_SYSCTLOID); 20463212Sabial e = e1; 20563212Sabial } 20663212Sabial return (error); 20763212Sabial} 20863212Sabial 20963212Sabial/* Add an entry to the context */ 21063212Sabialstruct sysctl_ctx_entry * 21163212Sabialsysctl_ctx_entry_add(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 21263212Sabial{ 21363212Sabial struct sysctl_ctx_entry *e; 21463212Sabial 21563212Sabial if (clist == NULL || oidp == NULL) 21663212Sabial return(NULL); 21763978Speter e = malloc(sizeof(struct sysctl_ctx_entry), M_SYSCTLOID, M_WAITOK); 21863212Sabial e->entry = oidp; 21963212Sabial TAILQ_INSERT_HEAD(clist, e, link); 22063212Sabial return (e); 22163212Sabial} 22263212Sabial 22363212Sabial/* Find an entry in the context */ 22463212Sabialstruct sysctl_ctx_entry * 22563212Sabialsysctl_ctx_entry_find(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 22663212Sabial{ 22763212Sabial struct sysctl_ctx_entry *e; 22863212Sabial 22963212Sabial if (clist == NULL || oidp == NULL) 23063212Sabial return(NULL); 23171999Sphk TAILQ_FOREACH(e, clist, link) { 23263212Sabial if(e->entry == oidp) 23363212Sabial return(e); 23463212Sabial } 23563212Sabial return (e); 23663212Sabial} 23763212Sabial 23844078Sdfr/* 23963212Sabial * Delete an entry from the context. 24063212Sabial * NOTE: this function doesn't free oidp! You have to remove it 24163212Sabial * with sysctl_remove_oid(). 24263212Sabial */ 24363212Sabialint 24463212Sabialsysctl_ctx_entry_del(struct sysctl_ctx_list *clist, struct sysctl_oid *oidp) 24563212Sabial{ 24663212Sabial struct sysctl_ctx_entry *e; 24763212Sabial 24863212Sabial if (clist == NULL || oidp == NULL) 24963212Sabial return (EINVAL); 25063212Sabial e = sysctl_ctx_entry_find(clist, oidp); 25163212Sabial if (e != NULL) { 25263212Sabial TAILQ_REMOVE(clist, e, link); 25363212Sabial free(e, M_SYSCTLOID); 25463212Sabial return (0); 25563212Sabial } else 25663212Sabial return (ENOENT); 25763212Sabial} 25863212Sabial 25963212Sabial/* 26063212Sabial * Remove dynamically created sysctl trees. 26163212Sabial * oidp - top of the tree to be removed 26263212Sabial * del - if 0 - just deregister, otherwise free up entries as well 26363212Sabial * recurse - if != 0 traverse the subtree to be deleted 26463212Sabial */ 26563212Sabialint 26663212Sabialsysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse) 26763212Sabial{ 26863212Sabial struct sysctl_oid *p; 26963212Sabial int error; 27063212Sabial 27163212Sabial if (oidp == NULL) 27263212Sabial return(EINVAL); 27363212Sabial if ((oidp->oid_kind & CTLFLAG_DYN) == 0) { 27463212Sabial printf("can't remove non-dynamic nodes!\n"); 27563212Sabial return (EINVAL); 27663212Sabial } 27763212Sabial /* 27863212Sabial * WARNING: normal method to do this should be through 27963212Sabial * sysctl_ctx_free(). Use recursing as the last resort 28063212Sabial * method to purge your sysctl tree of leftovers... 28163212Sabial * However, if some other code still references these nodes, 28263212Sabial * it will panic. 28363212Sabial */ 28463212Sabial if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 28563212Sabial if (oidp->oid_refcnt == 1) { 28663212Sabial SLIST_FOREACH(p, SYSCTL_CHILDREN(oidp), oid_link) { 28763212Sabial if (!recurse) 28863212Sabial return (ENOTEMPTY); 28963212Sabial error = sysctl_remove_oid(p, del, recurse); 29063212Sabial if (error) 29163212Sabial return (error); 29263212Sabial } 29363212Sabial if (del) 29463212Sabial free(SYSCTL_CHILDREN(oidp), M_SYSCTLOID); 29563212Sabial } 29663212Sabial } 29763212Sabial if (oidp->oid_refcnt > 1 ) { 29863212Sabial oidp->oid_refcnt--; 29963212Sabial } else { 30063212Sabial if (oidp->oid_refcnt == 0) { 30163212Sabial printf("Warning: bad oid_refcnt=%u (%s)!\n", 30263212Sabial oidp->oid_refcnt, oidp->oid_name); 30363212Sabial return (EINVAL); 30463212Sabial } 30563212Sabial sysctl_unregister_oid(oidp); 30663212Sabial if (del) { 30763978Speter free((void *)(uintptr_t)(const void *)oidp->oid_name, 30863978Speter M_SYSCTLOID); 30963212Sabial free(oidp, M_SYSCTLOID); 31063212Sabial } 31163212Sabial } 31263212Sabial return (0); 31363212Sabial} 31463212Sabial 31563212Sabial/* 31663212Sabial * Create new sysctls at run time. 31763212Sabial * clist may point to a valid context initialized with sysctl_ctx_init(). 31863212Sabial */ 31963212Sabialstruct sysctl_oid * 32063212Sabialsysctl_add_oid(struct sysctl_ctx_list *clist, struct sysctl_oid_list *parent, 32170679Sjhb int number, const char *name, int kind, void *arg1, int arg2, 32270679Sjhb int (*handler)(SYSCTL_HANDLER_ARGS), const char *fmt, const char *descr) 32363212Sabial{ 32463212Sabial struct sysctl_oid *oidp; 32563212Sabial ssize_t len; 32663978Speter char *newname; 32763212Sabial 32863212Sabial /* You have to hook up somewhere.. */ 32963212Sabial if (parent == NULL) 33063212Sabial return(NULL); 33163212Sabial /* Check if the node already exists, otherwise create it */ 33263212Sabial oidp = sysctl_find_oidname(name, parent); 33363212Sabial if (oidp != NULL) { 33463212Sabial if ((oidp->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 33563212Sabial oidp->oid_refcnt++; 33663212Sabial /* Update the context */ 33763212Sabial if (clist != NULL) 33863212Sabial sysctl_ctx_entry_add(clist, oidp); 33963212Sabial return (oidp); 34063212Sabial } else { 34163212Sabial printf("can't re-use a leaf (%s)!\n", name); 34263212Sabial return (NULL); 34363212Sabial } 34463212Sabial } 34569781Sdwmalone oidp = malloc(sizeof(struct sysctl_oid), M_SYSCTLOID, M_WAITOK|M_ZERO); 34663212Sabial oidp->oid_parent = parent; 34763212Sabial SLIST_NEXT(oidp, oid_link) = NULL; 34863212Sabial oidp->oid_number = number; 34963212Sabial oidp->oid_refcnt = 1; 35063212Sabial len = strlen(name); 35163978Speter newname = malloc(len + 1, M_SYSCTLOID, M_WAITOK); 35263978Speter bcopy(name, newname, len + 1); 35363978Speter newname[len] = '\0'; 35463978Speter oidp->oid_name = newname; 35563212Sabial oidp->oid_handler = handler; 35663212Sabial oidp->oid_kind = CTLFLAG_DYN | kind; 35763212Sabial if ((kind & CTLTYPE) == CTLTYPE_NODE) { 35863212Sabial /* Allocate space for children */ 35963212Sabial SYSCTL_CHILDREN(oidp) = malloc(sizeof(struct sysctl_oid_list), 36063212Sabial M_SYSCTLOID, M_WAITOK); 36163212Sabial SLIST_INIT(SYSCTL_CHILDREN(oidp)); 36263212Sabial } else { 36363212Sabial oidp->oid_arg1 = arg1; 36463212Sabial oidp->oid_arg2 = arg2; 36563212Sabial } 36663212Sabial oidp->oid_fmt = fmt; 36763212Sabial /* Update the context, if used */ 36863212Sabial if (clist != NULL) 36963212Sabial sysctl_ctx_entry_add(clist, oidp); 37063212Sabial /* Register this oid */ 37163212Sabial sysctl_register_oid(oidp); 37263212Sabial return (oidp); 37363212Sabial} 37463212Sabial 37563212Sabial/* 37644078Sdfr * Register the kernel's oids on startup. 37744078Sdfr */ 37878161SpeterSET_DECLARE(sysctl_set, struct sysctl_oid); 37912152Sphk 38080338Sroamstatic void 38180338Sroamsysctl_register_all(void *arg) 38238869Sbde{ 38378161Speter struct sysctl_oid **oidp; 38478161Speter 38578161Speter SET_FOREACH(oidp, sysctl_set) 38678161Speter sysctl_register_oid(*oidp); 38738869Sbde} 38844078SdfrSYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_all, 0); 38944078Sdfr 39012623Sphk/* 39112623Sphk * "Staff-functions" 39212623Sphk * 39312650Sphk * These functions implement a presently undocumented interface 39412650Sphk * used by the sysctl program to walk the tree, and get the type 39512650Sphk * so it can print the value. 39612650Sphk * This interface is under work and consideration, and should probably 39712650Sphk * be killed with a big axe by the first person who can find the time. 39812650Sphk * (be aware though, that the proper interface isn't as obvious as it 39912650Sphk * may seem, there are various conflicting requirements. 40012650Sphk * 40112623Sphk * {0,0} printf the entire MIB-tree. 40212623Sphk * {0,1,...} return the name of the "..." OID. 40342467Sphk * {0,2,...} return the next OID. 40412623Sphk * {0,3} return the OID of the name in "new" 40512650Sphk * {0,4,...} return the kind & format info for the "..." OID. 40612623Sphk */ 40712623Sphk 40812152Sphkstatic void 40944078Sdfrsysctl_sysctl_debug_dump_node(struct sysctl_oid_list *l, int i) 41012152Sphk{ 41144078Sdfr int k; 41244078Sdfr struct sysctl_oid *oidp; 41312152Sphk 41444078Sdfr SLIST_FOREACH(oidp, l, oid_link) { 41512152Sphk 41612152Sphk for (k=0; k<i; k++) 41712152Sphk printf(" "); 41812152Sphk 41944078Sdfr printf("%d %s ", oidp->oid_number, oidp->oid_name); 42012152Sphk 42112152Sphk printf("%c%c", 42244078Sdfr oidp->oid_kind & CTLFLAG_RD ? 'R':' ', 42344078Sdfr oidp->oid_kind & CTLFLAG_WR ? 'W':' '); 42412152Sphk 42544078Sdfr if (oidp->oid_handler) 42615241Sphk printf(" *Handler"); 42715241Sphk 42844078Sdfr switch (oidp->oid_kind & CTLTYPE) { 42912243Sphk case CTLTYPE_NODE: 43015241Sphk printf(" Node\n"); 43144078Sdfr if (!oidp->oid_handler) { 43212152Sphk sysctl_sysctl_debug_dump_node( 43344078Sdfr oidp->oid_arg1, i+2); 43412152Sphk } 43512152Sphk break; 43612152Sphk case CTLTYPE_INT: printf(" Int\n"); break; 43712152Sphk case CTLTYPE_STRING: printf(" String\n"); break; 43812152Sphk case CTLTYPE_QUAD: printf(" Quad\n"); break; 43912152Sphk case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; 44012152Sphk default: printf("\n"); 44112152Sphk } 44212152Sphk 44312152Sphk } 44412152Sphk} 44512152Sphk 44612152Sphkstatic int 44762573Sphksysctl_sysctl_debug(SYSCTL_HANDLER_ARGS) 44812152Sphk{ 44944078Sdfr sysctl_sysctl_debug_dump_node(&sysctl__children, 0); 45012152Sphk return ENOENT; 45112152Sphk} 45212152Sphk 45312152SphkSYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, 45412623Sphk 0, 0, sysctl_sysctl_debug, "-", ""); 45512152Sphk 45612623Sphkstatic int 45762573Sphksysctl_sysctl_name(SYSCTL_HANDLER_ARGS) 45812623Sphk{ 45912623Sphk int *name = (int *) arg1; 46012623Sphk u_int namelen = arg2; 46144078Sdfr int error = 0; 46244078Sdfr struct sysctl_oid *oid; 46344972Sphk struct sysctl_oid_list *lsp = &sysctl__children, *lsp2; 46412623Sphk char buf[10]; 46512131Sphk 46612623Sphk while (namelen) { 46712623Sphk if (!lsp) { 46841514Sarchie snprintf(buf,sizeof(buf),"%d",*name); 46912623Sphk if (req->oldidx) 47012623Sphk error = SYSCTL_OUT(req, ".", 1); 47112623Sphk if (!error) 47212623Sphk error = SYSCTL_OUT(req, buf, strlen(buf)); 47312623Sphk if (error) 47412623Sphk return (error); 47512623Sphk namelen--; 47612623Sphk name++; 47712623Sphk continue; 47812623Sphk } 47944972Sphk lsp2 = 0; 48044078Sdfr SLIST_FOREACH(oid, lsp, oid_link) { 48144078Sdfr if (oid->oid_number != *name) 48212623Sphk continue; 48312131Sphk 48412623Sphk if (req->oldidx) 48512623Sphk error = SYSCTL_OUT(req, ".", 1); 48612623Sphk if (!error) 48744078Sdfr error = SYSCTL_OUT(req, oid->oid_name, 48844078Sdfr strlen(oid->oid_name)); 48912623Sphk if (error) 49012623Sphk return (error); 49112623Sphk 49212623Sphk namelen--; 49312623Sphk name++; 49412623Sphk 49544972Sphk if ((oid->oid_kind & CTLTYPE) != CTLTYPE_NODE) 49612623Sphk break; 49712623Sphk 49844078Sdfr if (oid->oid_handler) 49912623Sphk break; 50012623Sphk 50144972Sphk lsp2 = (struct sysctl_oid_list *)oid->oid_arg1; 50212623Sphk break; 50312623Sphk } 50444972Sphk lsp = lsp2; 50512623Sphk } 50612623Sphk return (SYSCTL_OUT(req, "", 1)); 50712623Sphk} 50812623Sphk 50912623SphkSYSCTL_NODE(_sysctl, 1, name, CTLFLAG_RD, sysctl_sysctl_name, ""); 51012623Sphk 51112623Sphkstatic int 51263978Spetersysctl_sysctl_next_ls(struct sysctl_oid_list *lsp, int *name, u_int namelen, 51344078Sdfr int *next, int *len, int level, struct sysctl_oid **oidpp) 51412623Sphk{ 51544078Sdfr struct sysctl_oid *oidp; 51612623Sphk 51712623Sphk *len = level; 51844078Sdfr SLIST_FOREACH(oidp, lsp, oid_link) { 51944078Sdfr *next = oidp->oid_number; 52044078Sdfr *oidpp = oidp; 52112623Sphk 52212623Sphk if (!namelen) { 52344078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 52412623Sphk return 0; 52544078Sdfr if (oidp->oid_handler) 52612623Sphk /* We really should call the handler here...*/ 52712623Sphk return 0; 52844078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 52963978Speter if (!sysctl_sysctl_next_ls(lsp, 0, 0, next+1, 53044078Sdfr len, level+1, oidpp)) 53115241Sphk return 0; 53215241Sphk goto next; 53312623Sphk } 53412623Sphk 53544078Sdfr if (oidp->oid_number < *name) 53612623Sphk continue; 53712623Sphk 53844078Sdfr if (oidp->oid_number > *name) { 53944078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 54012623Sphk return 0; 54144078Sdfr if (oidp->oid_handler) 54212623Sphk return 0; 54344078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 54463978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, 54544078Sdfr next+1, len, level+1, oidpp)) 54612623Sphk return (0); 54715241Sphk goto next; 54812623Sphk } 54944078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 55012623Sphk continue; 55112623Sphk 55244078Sdfr if (oidp->oid_handler) 55312623Sphk continue; 55412623Sphk 55544078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 55663978Speter if (!sysctl_sysctl_next_ls(lsp, name+1, namelen-1, next+1, 55744078Sdfr len, level+1, oidpp)) 55812623Sphk return (0); 55915241Sphk next: 56012623Sphk namelen = 1; 56112623Sphk *len = level; 56212623Sphk } 56312623Sphk return 1; 56412623Sphk} 56512623Sphk 56612623Sphkstatic int 56762573Sphksysctl_sysctl_next(SYSCTL_HANDLER_ARGS) 56812623Sphk{ 56912623Sphk int *name = (int *) arg1; 57012623Sphk u_int namelen = arg2; 57112623Sphk int i, j, error; 57212623Sphk struct sysctl_oid *oid; 57344078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 57412623Sphk int newoid[CTL_MAXNAME]; 57512623Sphk 57663978Speter i = sysctl_sysctl_next_ls(lsp, name, namelen, newoid, &j, 1, &oid); 57712623Sphk if (i) 57812623Sphk return ENOENT; 57912650Sphk error = SYSCTL_OUT(req, newoid, j * sizeof (int)); 58012623Sphk return (error); 58112623Sphk} 58212623Sphk 58312623SphkSYSCTL_NODE(_sysctl, 2, next, CTLFLAG_RD, sysctl_sysctl_next, ""); 58412623Sphk 58512623Sphkstatic int 58644078Sdfrname2oid (char *name, int *oid, int *len, struct sysctl_oid **oidpp) 58712623Sphk{ 58844078Sdfr int i; 58944078Sdfr struct sysctl_oid *oidp; 59044078Sdfr struct sysctl_oid_list *lsp = &sysctl__children; 59112623Sphk char *p; 59212623Sphk 59312623Sphk if (!*name) 59412623Sphk return ENOENT; 59512623Sphk 59612623Sphk p = name + strlen(name) - 1 ; 59712623Sphk if (*p == '.') 59812623Sphk *p = '\0'; 59912623Sphk 60012623Sphk *len = 0; 60112623Sphk 60212623Sphk for (p = name; *p && *p != '.'; p++) 60312623Sphk ; 60412623Sphk i = *p; 60512623Sphk if (i == '.') 60612623Sphk *p = '\0'; 60712623Sphk 60844078Sdfr oidp = SLIST_FIRST(lsp); 60912623Sphk 61044078Sdfr while (oidp && *len < CTL_MAXNAME) { 61144078Sdfr if (strcmp(name, oidp->oid_name)) { 61244078Sdfr oidp = SLIST_NEXT(oidp, oid_link); 61312623Sphk continue; 61412623Sphk } 61544078Sdfr *oid++ = oidp->oid_number; 61612623Sphk (*len)++; 61712623Sphk 61812623Sphk if (!i) { 61944078Sdfr if (oidpp) 62044078Sdfr *oidpp = oidp; 62112623Sphk return (0); 62212623Sphk } 62312623Sphk 62444078Sdfr if ((oidp->oid_kind & CTLTYPE) != CTLTYPE_NODE) 62512623Sphk break; 62612623Sphk 62744078Sdfr if (oidp->oid_handler) 62812623Sphk break; 62912623Sphk 63044078Sdfr lsp = (struct sysctl_oid_list *)oidp->oid_arg1; 63144078Sdfr oidp = SLIST_FIRST(lsp); 63212623Sphk name = p+1; 63312623Sphk for (p = name; *p && *p != '.'; p++) 63412623Sphk ; 63512623Sphk i = *p; 63612623Sphk if (i == '.') 63712623Sphk *p = '\0'; 63812623Sphk } 63912623Sphk return ENOENT; 64012623Sphk} 64112623Sphk 64212623Sphkstatic int 64362573Sphksysctl_sysctl_name2oid(SYSCTL_HANDLER_ARGS) 64412623Sphk{ 64512623Sphk char *p; 64612623Sphk int error, oid[CTL_MAXNAME], len; 64712623Sphk struct sysctl_oid *op = 0; 64812623Sphk 64912623Sphk if (!req->newlen) 65012623Sphk return ENOENT; 65145140Sphk if (req->newlen >= MAXPATHLEN) /* XXX arbitrary, undocumented */ 65245140Sphk return (ENAMETOOLONG); 65312623Sphk 65412623Sphk p = malloc(req->newlen+1, M_SYSCTL, M_WAITOK); 65512623Sphk 65612623Sphk error = SYSCTL_IN(req, p, req->newlen); 65712623Sphk if (error) { 65812623Sphk free(p, M_SYSCTL); 65912623Sphk return (error); 66012623Sphk } 66112623Sphk 66212623Sphk p [req->newlen] = '\0'; 66312623Sphk 66412623Sphk error = name2oid(p, oid, &len, &op); 66512623Sphk 66612623Sphk free(p, M_SYSCTL); 66712623Sphk 66812623Sphk if (error) 66912623Sphk return (error); 67012623Sphk 67112650Sphk error = SYSCTL_OUT(req, oid, len * sizeof *oid); 67212623Sphk return (error); 67312623Sphk} 67412623Sphk 67512910SphkSYSCTL_PROC(_sysctl, 3, name2oid, CTLFLAG_RW|CTLFLAG_ANYBODY, 0, 0, 67612623Sphk sysctl_sysctl_name2oid, "I", ""); 67712623Sphk 67812623Sphkstatic int 67962573Sphksysctl_sysctl_oidfmt(SYSCTL_HANDLER_ARGS) 68012623Sphk{ 68144078Sdfr struct sysctl_oid *oid; 68253977Sgreen int error; 68312623Sphk 68453977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, NULL, req); 68553977Sgreen if (error) 68653977Sgreen return (error); 68712623Sphk 68844078Sdfr if (!oid->oid_fmt) 68953977Sgreen return (ENOENT); 69053977Sgreen error = SYSCTL_OUT(req, &oid->oid_kind, sizeof(oid->oid_kind)); 69153977Sgreen if (error) 69253977Sgreen return (error); 69353977Sgreen error = SYSCTL_OUT(req, oid->oid_fmt, strlen(oid->oid_fmt) + 1); 69412650Sphk return (error); 69512623Sphk} 69612623Sphk 69742467Sphk 69812623SphkSYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, ""); 69912623Sphk 70012243Sphk/* 70112623Sphk * Default "handler" functions. 70212623Sphk */ 70312623Sphk 70412623Sphk/* 70542095Sdfr * Handle an int, signed or unsigned. 70612243Sphk * Two cases: 70712243Sphk * a variable: point arg1 at it. 70812243Sphk * a constant: pass it in arg2. 70912243Sphk */ 71012243Sphk 71111865Sphkint 71262573Sphksysctl_handle_int(SYSCTL_HANDLER_ARGS) 71311863Sphk{ 71412243Sphk int error = 0; 71511863Sphk 71612243Sphk if (arg1) 71712243Sphk error = SYSCTL_OUT(req, arg1, sizeof(int)); 71820506Sbde else 71912243Sphk error = SYSCTL_OUT(req, &arg2, sizeof(int)); 72011863Sphk 72112243Sphk if (error || !req->newptr) 72212243Sphk return (error); 72311863Sphk 72412243Sphk if (!arg1) 72512243Sphk error = EPERM; 72612243Sphk else 72712243Sphk error = SYSCTL_IN(req, arg1, sizeof(int)); 72812243Sphk return (error); 72911863Sphk} 73011863Sphk 73112243Sphk/* 73245140Sphk * Handle a long, signed or unsigned. arg1 points to it. 73338517Sdfr */ 73438517Sdfr 73538517Sdfrint 73662573Sphksysctl_handle_long(SYSCTL_HANDLER_ARGS) 73738517Sdfr{ 73838517Sdfr int error = 0; 73938517Sdfr 74045140Sphk if (!arg1) 74145140Sphk return (EINVAL); 74242095Sdfr error = SYSCTL_OUT(req, arg1, sizeof(long)); 74338517Sdfr 74438517Sdfr if (error || !req->newptr) 74538517Sdfr return (error); 74638517Sdfr 74745140Sphk error = SYSCTL_IN(req, arg1, sizeof(long)); 74838517Sdfr return (error); 74938517Sdfr} 75038517Sdfr 75138517Sdfr/* 75212243Sphk * Handle our generic '\0' terminated 'C' string. 75312243Sphk * Two cases: 75412243Sphk * a variable string: point arg1 at it, arg2 is max length. 75512243Sphk * a constant string: point arg1 at it, arg2 is zero. 75612243Sphk */ 75712243Sphk 75811865Sphkint 75962573Sphksysctl_handle_string(SYSCTL_HANDLER_ARGS) 76011863Sphk{ 76112243Sphk int error=0; 76211863Sphk 76312297Sphk error = SYSCTL_OUT(req, arg1, strlen((char *)arg1)+1); 76411863Sphk 76545140Sphk if (error || !req->newptr) 76612243Sphk return (error); 76711863Sphk 76845140Sphk if ((req->newlen - req->newidx) >= arg2) { 76945140Sphk error = EINVAL; 77012243Sphk } else { 77112243Sphk arg2 = (req->newlen - req->newidx); 77212243Sphk error = SYSCTL_IN(req, arg1, arg2); 77312243Sphk ((char *)arg1)[arg2] = '\0'; 77411863Sphk } 77512131Sphk 77612131Sphk return (error); 77711863Sphk} 77811863Sphk 77912243Sphk/* 78012243Sphk * Handle any kind of opaque data. 78112243Sphk * arg1 points to it, arg2 is the size. 78212243Sphk */ 78312243Sphk 78411865Sphkint 78562573Sphksysctl_handle_opaque(SYSCTL_HANDLER_ARGS) 78611863Sphk{ 78712243Sphk int error; 78812243Sphk 78912243Sphk error = SYSCTL_OUT(req, arg1, arg2); 79012243Sphk 79112243Sphk if (error || !req->newptr) 79212243Sphk return (error); 79312243Sphk 79412243Sphk error = SYSCTL_IN(req, arg1, arg2); 79512243Sphk 79612243Sphk return (error); 79712243Sphk} 79812243Sphk 79912260Sphk/* 80012260Sphk * Transfer functions to/from kernel space. 80112260Sphk * XXX: rather untested at this point 80212260Sphk */ 80312260Sphkstatic int 80438517Sdfrsysctl_old_kernel(struct sysctl_req *req, const void *p, size_t l) 80512243Sphk{ 80638517Sdfr size_t i = 0; 80712260Sphk 80812260Sphk if (req->oldptr) { 80938517Sdfr i = l; 81073971Stmm if (req->oldlen <= req->oldidx) 81173971Stmm i = 0; 81273971Stmm else 81373971Stmm if (i > req->oldlen - req->oldidx) 81473971Stmm i = req->oldlen - req->oldidx; 81512260Sphk if (i > 0) 81617971Sbde bcopy(p, (char *)req->oldptr + req->oldidx, i); 81712243Sphk } 81812260Sphk req->oldidx += l; 81916282Snate if (req->oldptr && i != l) 82011863Sphk return (ENOMEM); 82112260Sphk return (0); 82212243Sphk} 82312243Sphk 82412260Sphkstatic int 82538517Sdfrsysctl_new_kernel(struct sysctl_req *req, void *p, size_t l) 82612243Sphk{ 82712260Sphk if (!req->newptr) 82812260Sphk return 0; 82912260Sphk if (req->newlen - req->newidx < l) 83011863Sphk return (EINVAL); 83117971Sbde bcopy((char *)req->newptr + req->newidx, p, l); 83212243Sphk req->newidx += l; 83312131Sphk return (0); 83411863Sphk} 83511863Sphk 83616282Snateint 83776834Sjlemonkernel_sysctl(struct proc *p, int *name, u_int namelen, void *old, 83876834Sjlemon size_t *oldlenp, void *new, size_t newlen, size_t *retval) 83916282Snate{ 84016282Snate int error = 0; 84116282Snate struct sysctl_req req; 84216282Snate 84316282Snate bzero(&req, sizeof req); 84416282Snate 84516282Snate req.p = p; 84616282Snate 84716282Snate if (oldlenp) { 84816282Snate req.oldlen = *oldlenp; 84916282Snate } 85016282Snate 85116282Snate if (old) { 85216282Snate req.oldptr= old; 85316282Snate } 85416282Snate 85577646Sdd if (new != NULL) { 85616282Snate req.newlen = newlen; 85716282Snate req.newptr = new; 85816282Snate } 85916282Snate 86016282Snate req.oldfunc = sysctl_old_kernel; 86116282Snate req.newfunc = sysctl_new_kernel; 86216282Snate req.lock = 1; 86316282Snate 86416282Snate /* XXX this should probably be done in a general way */ 86516282Snate while (memlock.sl_lock) { 86616282Snate memlock.sl_want = 1; 86716282Snate (void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0); 86816282Snate memlock.sl_locked++; 86916282Snate } 87016282Snate memlock.sl_lock = 1; 87116282Snate 87216282Snate error = sysctl_root(0, name, namelen, &req); 87316282Snate 87416282Snate if (req.lock == 2) 87557975Sphk vsunlock(req.oldptr, req.oldlen); 87616282Snate 87716282Snate memlock.sl_lock = 0; 87816282Snate 87916282Snate if (memlock.sl_want) { 88016282Snate memlock.sl_want = 0; 88116282Snate wakeup((caddr_t)&memlock); 88216282Snate } 88316282Snate 88416282Snate if (error && error != ENOMEM) 88516282Snate return (error); 88616282Snate 88716282Snate if (retval) { 88816282Snate if (req.oldptr && req.oldidx > req.oldlen) 88916282Snate *retval = req.oldlen; 89016282Snate else 89116282Snate *retval = req.oldidx; 89216282Snate } 89316282Snate return (error); 89416282Snate} 89516282Snate 89676834Sjlemonint 89776834Sjlemonkernel_sysctlbyname(struct proc *p, char *name, void *old, size_t *oldlenp, 89876834Sjlemon void *new, size_t newlen, size_t *retval) 89976834Sjlemon{ 90076834Sjlemon int oid[CTL_MAXNAME]; 90178620Smjacob size_t oidlen, plen; 90278620Smjacob int error; 90376834Sjlemon 90476834Sjlemon oid[0] = 0; /* sysctl internal magic */ 90576834Sjlemon oid[1] = 3; /* name2oid */ 90676834Sjlemon oidlen = sizeof(oid); 90776834Sjlemon 90876834Sjlemon error = kernel_sysctl(p, oid, 2, oid, &oidlen, 90976834Sjlemon (void *)name, strlen(name), &plen); 91076834Sjlemon if (error) 91176834Sjlemon return (error); 91276834Sjlemon 91376834Sjlemon error = kernel_sysctl(p, oid, plen / sizeof(int), old, oldlenp, 91476834Sjlemon new, newlen, retval); 91576834Sjlemon return (error); 91676834Sjlemon} 91776834Sjlemon 91812260Sphk/* 91912260Sphk * Transfer function to/from user space. 92012260Sphk */ 92112260Sphkstatic int 92238517Sdfrsysctl_old_user(struct sysctl_req *req, const void *p, size_t l) 92312243Sphk{ 92438517Sdfr int error = 0; 92538517Sdfr size_t i = 0; 92612243Sphk 92712429Sphk if (req->lock == 1 && req->oldptr) { 92812429Sphk vslock(req->oldptr, req->oldlen); 92912429Sphk req->lock = 2; 93012429Sphk } 93112260Sphk if (req->oldptr) { 93238517Sdfr i = l; 93373971Stmm if (req->oldlen <= req->oldidx) 93473971Stmm i = 0; 93573971Stmm else 93673971Stmm if (i > req->oldlen - req->oldidx) 93773971Stmm i = req->oldlen - req->oldidx; 93812260Sphk if (i > 0) 93917971Sbde error = copyout(p, (char *)req->oldptr + req->oldidx, 94017971Sbde i); 94112260Sphk } 94212260Sphk req->oldidx += l; 94312243Sphk if (error) 94412243Sphk return (error); 94512260Sphk if (req->oldptr && i < l) 94612243Sphk return (ENOMEM); 94712260Sphk return (0); 94812243Sphk} 94912243Sphk 95012260Sphkstatic int 95138517Sdfrsysctl_new_user(struct sysctl_req *req, void *p, size_t l) 95212243Sphk{ 95312285Sphk int error; 95412260Sphk 95512260Sphk if (!req->newptr) 95612260Sphk return 0; 95712260Sphk if (req->newlen - req->newidx < l) 95812243Sphk return (EINVAL); 95917971Sbde error = copyin((char *)req->newptr + req->newidx, p, l); 96012243Sphk req->newidx += l; 96112243Sphk return (error); 96212243Sphk} 96312243Sphk 9641541Srgrimesint 96553977Sgreensysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 96653977Sgreen int *nindx, struct sysctl_req *req) 96712131Sphk{ 96844078Sdfr struct sysctl_oid *oid; 96953977Sgreen int indx; 97012131Sphk 97153977Sgreen oid = SLIST_FIRST(&sysctl__children); 97212131Sphk indx = 0; 97344078Sdfr while (oid && indx < CTL_MAXNAME) { 97444078Sdfr if (oid->oid_number == name[indx]) { 97512131Sphk indx++; 97644078Sdfr if (oid->oid_kind & CTLFLAG_NOLOCK) 97712429Sphk req->lock = 0; 97844078Sdfr if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 97953977Sgreen if (oid->oid_handler != NULL || 98053977Sgreen indx == namelen) { 98153977Sgreen *noid = oid; 98253977Sgreen if (nindx != NULL) 98353977Sgreen *nindx = indx; 98453977Sgreen return (0); 98553977Sgreen } 98653977Sgreen oid = SLIST_FIRST( 98753977Sgreen (struct sysctl_oid_list *)oid->oid_arg1); 98853977Sgreen } else if (indx == namelen) { 98953977Sgreen *noid = oid; 99053977Sgreen if (nindx != NULL) 99153977Sgreen *nindx = indx; 99253977Sgreen return (0); 99312131Sphk } else { 99453977Sgreen return (ENOTDIR); 99512131Sphk } 99612131Sphk } else { 99744078Sdfr oid = SLIST_NEXT(oid, oid_link); 99812131Sphk } 99912131Sphk } 100053977Sgreen return (ENOENT); 100153977Sgreen} 100253977Sgreen 100353977Sgreen/* 100453977Sgreen * Traverse our tree, and find the right node, execute whatever it points 100553977Sgreen * to, and return the resulting error code. 100653977Sgreen */ 100753977Sgreen 100853977Sgreenint 100962573Sphksysctl_root(SYSCTL_HANDLER_ARGS) 101053977Sgreen{ 101153977Sgreen struct sysctl_oid *oid; 101253977Sgreen int error, indx; 101353977Sgreen 101453977Sgreen error = sysctl_find_oid(arg1, arg2, &oid, &indx, req); 101553977Sgreen if (error) 101653977Sgreen return (error); 101753977Sgreen 101853977Sgreen if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 101953977Sgreen /* 102053977Sgreen * You can't call a sysctl when it's a node, but has 102153977Sgreen * no handler. Inform the user that it's a node. 102253977Sgreen * The indx may or may not be the same as namelen. 102353977Sgreen */ 102453977Sgreen if (oid->oid_handler == NULL) 102553977Sgreen return (EISDIR); 102653977Sgreen } 102753977Sgreen 102812131Sphk /* If writing isn't allowed */ 102944078Sdfr if (req->newptr && (!(oid->oid_kind & CTLFLAG_WR) || 103044078Sdfr ((oid->oid_kind & CTLFLAG_SECURE) && securelevel > 0))) 103112131Sphk return (EPERM); 103212131Sphk 103312910Sphk /* Most likely only root can write */ 103444078Sdfr if (!(oid->oid_kind & CTLFLAG_ANYBODY) && 103512910Sphk req->newptr && req->p && 103653977Sgreen (error = suser_xxx(0, req->p, 103746155Sphk (oid->oid_kind & CTLFLAG_PRISON) ? PRISON_ROOT : 0))) 103853977Sgreen return (error); 103912910Sphk 104044078Sdfr if (!oid->oid_handler) 104112131Sphk return EINVAL; 104212131Sphk 104353977Sgreen if ((oid->oid_kind & CTLTYPE) == CTLTYPE_NODE) 104453977Sgreen error = oid->oid_handler(oid, (int *)arg1 + indx, arg2 - indx, 104553977Sgreen req); 104653977Sgreen else 104753977Sgreen error = oid->oid_handler(oid, oid->oid_arg1, oid->oid_arg2, 104853977Sgreen req); 104953977Sgreen return (error); 105012131Sphk} 105112131Sphk 105212221Sbde#ifndef _SYS_SYSPROTO_H_ 105312171Sphkstruct sysctl_args { 105412171Sphk int *name; 105512171Sphk u_int namelen; 105612171Sphk void *old; 105712171Sphk size_t *oldlenp; 105812171Sphk void *new; 105912171Sphk size_t newlen; 106012171Sphk}; 106112221Sbde#endif 106212171Sphk 106312131Sphkint 106430994Sphk__sysctl(struct proc *p, struct sysctl_args *uap) 10651541Srgrimes{ 106638517Sdfr int error, i, name[CTL_MAXNAME]; 106738517Sdfr size_t j; 10681541Srgrimes 10691541Srgrimes if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) 10701541Srgrimes return (EINVAL); 107111863Sphk 10723308Sphk error = copyin(uap->name, &name, uap->namelen * sizeof(int)); 10733308Sphk if (error) 10741541Srgrimes return (error); 10751541Srgrimes 107612260Sphk error = userland_sysctl(p, name, uap->namelen, 107712171Sphk uap->old, uap->oldlenp, 0, 107812260Sphk uap->new, uap->newlen, &j); 107912260Sphk if (error && error != ENOMEM) 108012260Sphk return (error); 108112260Sphk if (uap->oldlenp) { 108212260Sphk i = copyout(&j, uap->oldlenp, sizeof(j)); 108312260Sphk if (i) 108412260Sphk return (i); 108512260Sphk } 108612260Sphk return (error); 108712171Sphk} 108812171Sphk 108912171Sphk/* 109012171Sphk * This is used from various compatibility syscalls too. That's why name 109112171Sphk * must be in kernel space. 109212171Sphk */ 109312171Sphkint 109480338Sroamuserland_sysctl(struct proc *p, int *name, u_int namelen, void *old, 109580338Sroam size_t *oldlenp, int inkernel, void *new, size_t newlen, size_t *retval) 109612171Sphk{ 109712429Sphk int error = 0; 109816159Sphk struct sysctl_req req, req2; 109912171Sphk 110012243Sphk bzero(&req, sizeof req); 110112243Sphk 110212285Sphk req.p = p; 110312285Sphk 110412171Sphk if (oldlenp) { 110512171Sphk if (inkernel) { 110612243Sphk req.oldlen = *oldlenp; 110712171Sphk } else { 110812260Sphk error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); 110912171Sphk if (error) 111012171Sphk return (error); 111112171Sphk } 111212171Sphk } 111312171Sphk 111412243Sphk if (old) { 111552644Sphk if (!useracc(old, req.oldlen, VM_PROT_WRITE)) 111612243Sphk return (EFAULT); 111712243Sphk req.oldptr= old; 111812243Sphk } 111912131Sphk 112077646Sdd if (new != NULL) { 112152644Sphk if (!useracc(new, req.newlen, VM_PROT_READ)) 112212243Sphk return (EFAULT); 112312243Sphk req.newlen = newlen; 112412243Sphk req.newptr = new; 112511863Sphk } 112612131Sphk 112712243Sphk req.oldfunc = sysctl_old_user; 112812243Sphk req.newfunc = sysctl_new_user; 112912429Sphk req.lock = 1; 113011863Sphk 113112429Sphk /* XXX this should probably be done in a general way */ 113212429Sphk while (memlock.sl_lock) { 113312429Sphk memlock.sl_want = 1; 113412429Sphk (void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0); 113512429Sphk memlock.sl_locked++; 113612429Sphk } 113712429Sphk memlock.sl_lock = 1; 113812429Sphk 113916159Sphk do { 114016159Sphk req2 = req; 114116159Sphk error = sysctl_root(0, name, namelen, &req2); 114216159Sphk } while (error == EAGAIN); 114312243Sphk 114416159Sphk req = req2; 114512429Sphk if (req.lock == 2) 114657975Sphk vsunlock(req.oldptr, req.oldlen); 114712429Sphk 114812429Sphk memlock.sl_lock = 0; 114912429Sphk 115012429Sphk if (memlock.sl_want) { 115112429Sphk memlock.sl_want = 0; 115212429Sphk wakeup((caddr_t)&memlock); 115312429Sphk } 115412429Sphk 115512260Sphk if (error && error != ENOMEM) 115612260Sphk return (error); 115712260Sphk 115812260Sphk if (retval) { 115912260Sphk if (req.oldptr && req.oldidx > req.oldlen) 116012243Sphk *retval = req.oldlen; 116112260Sphk else 116212260Sphk *retval = req.oldidx; 116311863Sphk } 116412260Sphk return (error); 11651541Srgrimes} 11661541Srgrimes 11671541Srgrimes#ifdef COMPAT_43 11681541Srgrimes#include <sys/socket.h> 116915103Sphk#include <vm/vm_param.h> 117015103Sphk 11711541Srgrimes#define KINFO_PROC (0<<8) 11721541Srgrimes#define KINFO_RT (1<<8) 11731541Srgrimes#define KINFO_VNODE (2<<8) 11741541Srgrimes#define KINFO_FILE (3<<8) 11751541Srgrimes#define KINFO_METER (4<<8) 11761541Srgrimes#define KINFO_LOADAVG (5<<8) 11771541Srgrimes#define KINFO_CLOCKRATE (6<<8) 11781541Srgrimes 11799455Speter/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 11809455Speter#define KINFO_BSDI_SYSINFO (101<<8) 11819455Speter 11829455Speter/* 11839455Speter * XXX this is bloat, but I hope it's better here than on the potentially 11849455Speter * limited kernel stack... -Peter 11859455Speter */ 11869455Speter 118712819Sphkstatic struct { 11889455Speter int bsdi_machine; /* "i386" on BSD/386 */ 11899455Speter/* ^^^ this is an offset to the string, relative to the struct start */ 11909455Speter char *pad0; 11919455Speter long pad1; 11929455Speter long pad2; 11939455Speter long pad3; 11949455Speter u_long pad4; 11959455Speter u_long pad5; 11969455Speter u_long pad6; 11979455Speter 11989455Speter int bsdi_ostype; /* "BSD/386" on BSD/386 */ 11999455Speter int bsdi_osrelease; /* "1.1" on BSD/386 */ 12009455Speter long pad7; 12019455Speter long pad8; 12029455Speter char *pad9; 12039455Speter 12049455Speter long pad10; 12059455Speter long pad11; 12069455Speter int pad12; 12079455Speter long pad13; 12089455Speter quad_t pad14; 12099455Speter long pad15; 12109455Speter 12119455Speter struct timeval pad16; 12129455Speter /* we dont set this, because BSDI's uname used gethostname() instead */ 12139455Speter int bsdi_hostname; /* hostname on BSD/386 */ 12149455Speter 12159455Speter /* the actual string data is appended here */ 12169455Speter 12179455Speter} bsdi_si; 12189455Speter/* 12199455Speter * this data is appended to the end of the bsdi_si structure during copyout. 12209455Speter * The "char *" offsets are relative to the base of the bsdi_si struct. 12219455Speter * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 12229455Speter * should not exceed the length of the buffer here... (or else!! :-) 12239455Speter */ 122412819Sphkstatic char bsdi_strings[80]; /* It had better be less than this! */ 12259455Speter 122612221Sbde#ifndef _SYS_SYSPROTO_H_ 12271541Srgrimesstruct getkerninfo_args { 12281541Srgrimes int op; 12291541Srgrimes char *where; 123038864Sbde size_t *size; 12311541Srgrimes int arg; 12321541Srgrimes}; 123312221Sbde#endif 12341541Srgrimes 12351549Srgrimesint 123630994Sphkogetkerninfo(struct proc *p, struct getkerninfo_args *uap) 12371541Srgrimes{ 123812171Sphk int error, name[6]; 123938517Sdfr size_t size; 12401541Srgrimes 12411541Srgrimes switch (uap->op & 0xff00) { 12421541Srgrimes 12431541Srgrimes case KINFO_RT: 124412171Sphk name[0] = CTL_NET; 124512171Sphk name[1] = PF_ROUTE; 124612171Sphk name[2] = 0; 124712171Sphk name[3] = (uap->op & 0xff0000) >> 16; 124812171Sphk name[4] = uap->op & 0xff; 124912171Sphk name[5] = uap->arg; 125012171Sphk error = userland_sysctl(p, name, 6, uap->where, uap->size, 125112429Sphk 0, 0, 0, &size); 12521541Srgrimes break; 12531541Srgrimes 12541541Srgrimes case KINFO_VNODE: 125512171Sphk name[0] = CTL_KERN; 125612171Sphk name[1] = KERN_VNODE; 125712171Sphk error = userland_sysctl(p, name, 2, uap->where, uap->size, 125812429Sphk 0, 0, 0, &size); 12591541Srgrimes break; 12601541Srgrimes 12611541Srgrimes case KINFO_PROC: 126212171Sphk name[0] = CTL_KERN; 126312171Sphk name[1] = KERN_PROC; 126412171Sphk name[2] = uap->op & 0xff; 126512171Sphk name[3] = uap->arg; 126612171Sphk error = userland_sysctl(p, name, 4, uap->where, uap->size, 126712429Sphk 0, 0, 0, &size); 12681541Srgrimes break; 12691541Srgrimes 12701541Srgrimes case KINFO_FILE: 127112171Sphk name[0] = CTL_KERN; 127212171Sphk name[1] = KERN_FILE; 127312171Sphk error = userland_sysctl(p, name, 2, uap->where, uap->size, 127412429Sphk 0, 0, 0, &size); 12751541Srgrimes break; 12761541Srgrimes 12771541Srgrimes case KINFO_METER: 127812171Sphk name[0] = CTL_VM; 127912171Sphk name[1] = VM_METER; 128012171Sphk error = userland_sysctl(p, name, 2, uap->where, uap->size, 128112429Sphk 0, 0, 0, &size); 12821541Srgrimes break; 12831541Srgrimes 12841541Srgrimes case KINFO_LOADAVG: 128512171Sphk name[0] = CTL_VM; 128612171Sphk name[1] = VM_LOADAVG; 128712171Sphk error = userland_sysctl(p, name, 2, uap->where, uap->size, 128812429Sphk 0, 0, 0, &size); 12891541Srgrimes break; 12901541Srgrimes 12911541Srgrimes case KINFO_CLOCKRATE: 129212171Sphk name[0] = CTL_KERN; 129312171Sphk name[1] = KERN_CLOCKRATE; 129412171Sphk error = userland_sysctl(p, name, 2, uap->where, uap->size, 129512429Sphk 0, 0, 0, &size); 12961541Srgrimes break; 12971541Srgrimes 12989455Speter case KINFO_BSDI_SYSINFO: { 12999455Speter /* 13009455Speter * this is pretty crude, but it's just enough for uname() 13019455Speter * from BSDI's 1.x libc to work. 13029455Speter * 13039455Speter * In particular, it doesn't return the same results when 13049455Speter * the supplied buffer is too small. BSDI's version apparently 13059455Speter * will return the amount copied, and set the *size to how 13069455Speter * much was needed. The emulation framework here isn't capable 13079455Speter * of that, so we just set both to the amount copied. 13089455Speter * BSDI's 2.x product apparently fails with ENOMEM in this 13099455Speter * scenario. 13109455Speter */ 13119455Speter 13129455Speter u_int needed; 13139455Speter u_int left; 13149455Speter char *s; 13159455Speter 13169455Speter bzero((char *)&bsdi_si, sizeof(bsdi_si)); 13179455Speter bzero(bsdi_strings, sizeof(bsdi_strings)); 13189455Speter 13199455Speter s = bsdi_strings; 13209455Speter 13219455Speter bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 13229455Speter strcpy(s, ostype); 13239455Speter s += strlen(s) + 1; 13249455Speter 13259455Speter bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 13269455Speter strcpy(s, osrelease); 13279455Speter s += strlen(s) + 1; 13289455Speter 13299455Speter bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 13309455Speter strcpy(s, machine); 13319455Speter s += strlen(s) + 1; 13329455Speter 13339455Speter needed = sizeof(bsdi_si) + (s - bsdi_strings); 13349455Speter 13359455Speter if (uap->where == NULL) { 13369455Speter /* process is asking how much buffer to supply.. */ 13379455Speter size = needed; 13389455Speter error = 0; 13399455Speter break; 13409455Speter } 13419455Speter 13429455Speter 13439455Speter /* if too much buffer supplied, trim it down */ 13449455Speter if (size > needed) 13459455Speter size = needed; 13469455Speter 13479455Speter /* how much of the buffer is remaining */ 13489455Speter left = size; 13499455Speter 13509455Speter if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 13519455Speter break; 13529455Speter 13539455Speter /* is there any point in continuing? */ 13549455Speter if (left > sizeof(bsdi_si)) { 13559455Speter left -= sizeof(bsdi_si); 13569455Speter error = copyout(&bsdi_strings, 13579455Speter uap->where + sizeof(bsdi_si), left); 13589455Speter } 13599455Speter break; 13609455Speter } 13619455Speter 13621541Srgrimes default: 13631541Srgrimes return (EOPNOTSUPP); 13641541Srgrimes } 13651541Srgrimes if (error) 13661541Srgrimes return (error); 136730994Sphk p->p_retval[0] = size; 13681541Srgrimes if (uap->size) 13691541Srgrimes error = copyout((caddr_t)&size, (caddr_t)uap->size, 13701541Srgrimes sizeof(size)); 13711541Srgrimes return (error); 13721541Srgrimes} 13731541Srgrimes#endif /* COMPAT_43 */ 1374