netbsd32_sysctl.c revision 1.13
1 /* $NetBSD: netbsd32_sysctl.c,v 1.13 2004/03/09 03:11:39 atatat Exp $ */ 2 3 /* 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Brown. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: netbsd32_sysctl.c,v 1.13 2004/03/09 03:11:39 atatat Exp $"); 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_ddb.h" 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 #include <sys/mount.h> 46 #include <sys/stat.h> 47 #include <sys/time.h> 48 #include <sys/vnode.h> 49 #include <sys/sa.h> 50 #include <sys/syscallargs.h> 51 #include <sys/proc.h> 52 #include <sys/sysctl.h> 53 54 #include <uvm/uvm_extern.h> 55 56 #include <compat/netbsd32/netbsd32.h> 57 #include <compat/netbsd32/netbsd32_syscall.h> 58 #include <compat/netbsd32/netbsd32_syscallargs.h> 59 #include <compat/netbsd32/netbsd32_conv.h> 60 61 #if defined(DDB) 62 #include <ddb/ddbvar.h> 63 #endif 64 65 struct sysctlnode netbsd32_sysctl_root = { 66 .sysctl_flags = SYSCTL_ROOT|CTLTYPE_NODE, 67 .sysctl_num = 0, 68 .sysctl_size = sizeof(struct sysctlnode), 69 .sysctl_name = "(netbsd32_root)", 70 }; 71 72 /* 73 * sysctl helper routine for netbsd32's kern.boottime node 74 */ 75 static int 76 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 77 { 78 struct sysctlnode node; 79 struct netbsd32_timeval bt32; 80 81 netbsd32_from_timeval(&boottime, &bt32); 82 83 node = *rnode; 84 node.sysctl_data = &bt32; 85 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 86 } 87 88 /* 89 * sysctl helper routine for netbsd32's vm.loadavg node 90 */ 91 static int 92 netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) 93 { 94 struct sysctlnode node; 95 struct netbsd32_loadavg av32; 96 97 netbsd32_from_loadavg(&av32, &averunnable); 98 99 node = *rnode; 100 node.sysctl_data = &av32; 101 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 102 } 103 104 SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "sysctl netbsd32 shadow tree setup") 105 { 106 extern char machine_arch32[]; 107 struct sysctlnode *r; 108 109 r = &netbsd32_sysctl_root; 110 sysctl_createv(SYSCTL_PERMANENT, 111 CTLTYPE_NODE, "kern", &r, 112 NULL, 0, NULL, 0, 113 CTL_KERN, CTL_EOL); 114 r = &netbsd32_sysctl_root; 115 sysctl_createv(SYSCTL_PERMANENT, 116 CTLTYPE_STRUCT, "boottime", &r, 117 netbsd32_sysctl_kern_boottime, 0, NULL, 118 sizeof(struct netbsd32_timeval), 119 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 120 121 r = &netbsd32_sysctl_root; 122 sysctl_createv(SYSCTL_PERMANENT, 123 CTLTYPE_NODE, "vm", &r, 124 NULL, 0, NULL, 0, 125 CTL_VM, CTL_EOL); 126 r = &netbsd32_sysctl_root; 127 sysctl_createv(SYSCTL_PERMANENT, 128 CTLTYPE_STRUCT, "loadavg", &r, 129 netbsd32_sysctl_vm_loadavg, 0, NULL, 130 sizeof(struct netbsd32_loadavg), 131 CTL_VM, VM_LOADAVG, CTL_EOL); 132 133 r = &netbsd32_sysctl_root; 134 sysctl_createv(SYSCTL_PERMANENT, 135 CTLTYPE_NODE, "hw", &r, 136 NULL, 0, NULL, 0, 137 CTL_HW, CTL_EOL); 138 r = &netbsd32_sysctl_root; 139 sysctl_createv(SYSCTL_PERMANENT, 140 CTLTYPE_STRING, "machine_arch", &r, 141 NULL, 0, machine_arch32, 0, 142 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 143 } 144 145 int 146 netbsd32___sysctl(l, v, retval) 147 struct lwp *l; 148 void *v; 149 register_t *retval; 150 { 151 struct netbsd32___sysctl_args /* { 152 syscallarg(netbsd32_intp) name; 153 syscallarg(u_int) namelen; 154 syscallarg(netbsd32_voidp) old; 155 syscallarg(netbsd32_size_tp) oldlenp; 156 syscallarg(netbsd32_voidp) new; 157 syscallarg(netbsd32_size_t) newlen; 158 } */ *uap = v; 159 struct sysctlnode *pnode; 160 netbsd32_size_t netbsd32_oldlen; 161 size_t oldlen, *oldlenp, savelen; 162 int name[CTL_MAXNAME], error, nerror, *namep; 163 void *newp, *oldp; 164 165 /* 166 * get and convert 32 bit size_t to native size_t 167 */ 168 namep = NETBSD32PTR64(SCARG(uap, name)); 169 oldp = NETBSD32PTR64(SCARG(uap, old)); 170 newp = NETBSD32PTR64(SCARG(uap, new)); 171 oldlenp = NETBSD32PTR64(SCARG(uap, oldlenp)); 172 oldlen = 0; 173 if (oldlenp != NULL) { 174 error = copyin(oldlenp, &netbsd32_oldlen, 175 sizeof(netbsd32_oldlen)); 176 if (error) 177 return (error); 178 oldlen = netbsd32_oldlen; 179 } 180 savelen = oldlen; 181 182 /* 183 * retrieve name and see if we need to dispatch this query to 184 * the shadow tree. if we find it in the shadow tree, 185 * dispatch to there, otherwise NULL means use the built-in 186 * default main tree. 187 */ 188 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 189 return (EINVAL); 190 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 191 if (error) 192 return (error); 193 194 /* 195 * wire old so that copyout() is less likely to fail? 196 */ 197 error = sysctl_lock(l, oldp, savelen); 198 if (error) 199 return (error); 200 201 pnode = &netbsd32_sysctl_root; 202 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 203 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 204 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 205 oldp, &oldlen, 206 newp, SCARG(uap, newlen), 207 &name[0], l, pnode); 208 209 /* 210 * release the sysctl lock 211 */ 212 sysctl_unlock(l); 213 214 /* 215 * reset caller's oldlen, even if we got an error 216 */ 217 if (oldlenp) { 218 netbsd32_oldlen = oldlen; 219 nerror = copyout(&netbsd32_oldlen, oldlenp, 220 sizeof(netbsd32_oldlen)); 221 if (error == 0) 222 error = nerror; 223 } 224 225 /* 226 * if the only problem is that we weren't given enough space, 227 * that's an ENOMEM error 228 */ 229 if (error == 0 && oldp != NULL && savelen < oldlen) 230 error = ENOMEM; 231 232 return (error); 233 } 234
Indexes created Mon Sep 29 21:09:56 GMT 2025