netbsd32_sysctl.c revision 1.23.6.1
1 /* $NetBSD: netbsd32_sysctl.c,v 1.23.6.1 2007/04/10 13:26:30 ad 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 1.23.6.1 2007/04/10 13:26:30 ad Exp $"); 36 37 #if defined(_KERNEL_OPT) 38 #include "opt_ddb.h" 39 #include "opt_ktrace.h" 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 #include <sys/mount.h> 47 #include <sys/stat.h> 48 #include <sys/time.h> 49 #include <sys/vnode.h> 50 #include <sys/syscallargs.h> 51 #include <sys/proc.h> 52 #include <sys/sysctl.h> 53 #include <sys/dirent.h> 54 #ifdef KTRACE 55 #include <sys/ktrace.h> 56 #endif 57 58 #include <uvm/uvm_extern.h> 59 60 #include <compat/netbsd32/netbsd32.h> 61 #include <compat/netbsd32/netbsd32_syscall.h> 62 #include <compat/netbsd32/netbsd32_syscallargs.h> 63 #include <compat/netbsd32/netbsd32_conv.h> 64 65 #if defined(DDB) 66 #include <ddb/ddbvar.h> 67 #endif 68 69 struct sysctlnode netbsd32_sysctl_root = { 70 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, 71 .sysctl_num = 0, 72 .sysctl_name = "(netbsd32_root)", 73 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 74 }; 75 76 /* 77 * sysctl helper routine for netbsd32's kern.boottime node 78 */ 79 static int 80 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 81 { 82 struct sysctlnode node; 83 struct netbsd32_timeval bt32; 84 85 netbsd32_from_timeval(&boottime, &bt32); 86 87 node = *rnode; 88 node.sysctl_data = &bt32; 89 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 90 } 91 92 /* 93 * sysctl helper routine for netbsd32's vm.loadavg node 94 */ 95 static int 96 netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) 97 { 98 struct sysctlnode node; 99 struct netbsd32_loadavg av32; 100 101 netbsd32_from_loadavg(&av32, &averunnable); 102 103 node = *rnode; 104 node.sysctl_data = &av32; 105 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 106 } 107 108 SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "sysctl netbsd32 shadow tree setup") 109 { 110 const struct sysctlnode *_root = &netbsd32_sysctl_root; 111 extern const char machine_arch32[]; 112 extern const char machine32[]; 113 114 sysctl_createv(clog, 0, &_root, NULL, 115 CTLFLAG_PERMANENT, 116 CTLTYPE_NODE, "kern", NULL, 117 NULL, 0, NULL, 0, 118 CTL_KERN, CTL_EOL); 119 sysctl_createv(clog, 0, &_root, NULL, 120 CTLFLAG_PERMANENT, 121 CTLTYPE_STRUCT, "boottime", NULL, 122 netbsd32_sysctl_kern_boottime, 0, NULL, 123 sizeof(struct netbsd32_timeval), 124 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 125 126 sysctl_createv(clog, 0, &_root, NULL, 127 CTLFLAG_PERMANENT, 128 CTLTYPE_NODE, "vm", NULL, 129 NULL, 0, NULL, 0, 130 CTL_VM, CTL_EOL); 131 sysctl_createv(clog, 0, &_root, NULL, 132 CTLFLAG_PERMANENT, 133 CTLTYPE_STRUCT, "loadavg", NULL, 134 netbsd32_sysctl_vm_loadavg, 0, NULL, 135 sizeof(struct netbsd32_loadavg), 136 CTL_VM, VM_LOADAVG, CTL_EOL); 137 138 sysctl_createv(clog, 0, &_root, NULL, 139 CTLFLAG_PERMANENT, 140 CTLTYPE_NODE, "hw", NULL, 141 NULL, 0, NULL, 0, 142 CTL_HW, CTL_EOL); 143 sysctl_createv(clog, 0, &_root, NULL, 144 CTLFLAG_PERMANENT, 145 CTLTYPE_STRING, "machine", NULL, 146 NULL, 0, &machine32, 0, 147 CTL_HW, HW_MACHINE, CTL_EOL); 148 sysctl_createv(clog, 0, &_root, NULL, 149 CTLFLAG_PERMANENT, 150 CTLTYPE_STRING, "machine_arch", NULL, 151 NULL, 0, &machine_arch32, 0, 152 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 153 } 154 155 int 156 netbsd32___sysctl(l, v, retval) 157 struct lwp *l; 158 void *v; 159 register_t *retval; 160 { 161 struct netbsd32___sysctl_args /* { 162 syscallarg(netbsd32_intp) name; 163 syscallarg(u_int) namelen; 164 syscallarg(netbsd32_voidp) old; 165 syscallarg(netbsd32_size_tp) oldlenp; 166 syscallarg(netbsd32_voidp) new; 167 syscallarg(netbsd32_size_t) newlen; 168 } */ *uap = v; 169 const struct sysctlnode *pnode; 170 netbsd32_size_t netbsd32_oldlen; 171 size_t oldlen, *oldlenp, savelen; 172 int name[CTL_MAXNAME], error, nerror, *namep; 173 void *newp, *oldp; 174 175 /* 176 * get and convert 32 bit size_t to native size_t 177 */ 178 namep = SCARG_P32(uap, name); 179 oldp = SCARG_P32(uap, old); 180 newp = SCARG_P32(uap, new); 181 oldlenp = SCARG_P32(uap, oldlenp); 182 oldlen = 0; 183 if (oldlenp != NULL) { 184 error = copyin(oldlenp, &netbsd32_oldlen, 185 sizeof(netbsd32_oldlen)); 186 if (error) 187 return (error); 188 oldlen = netbsd32_oldlen; 189 } 190 savelen = oldlen; 191 192 /* 193 * retrieve name and see if we need to dispatch this query to 194 * the shadow tree. if we find it in the shadow tree, 195 * dispatch to there, otherwise NULL means use the built-in 196 * default main tree. 197 */ 198 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 199 return (EINVAL); 200 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 201 if (error) 202 return (error); 203 204 #ifdef KTRACE 205 if (KTRPOINT(l->l_proc, KTR_MIB)) 206 ktrmib(l, name, SCARG(uap, namelen)); 207 #endif 208 209 /* 210 * wire old so that copyout() is less likely to fail? 211 */ 212 error = sysctl_lock(l, oldp, savelen); 213 if (error) 214 return (error); 215 216 pnode = &netbsd32_sysctl_root; 217 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 218 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 219 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 220 oldp, &oldlen, 221 newp, SCARG(uap, newlen), 222 &name[0], l, pnode); 223 224 /* 225 * release the sysctl lock 226 */ 227 sysctl_unlock(l); 228 229 /* 230 * reset caller's oldlen, even if we got an error 231 */ 232 if (oldlenp) { 233 netbsd32_oldlen = oldlen; 234 nerror = copyout(&netbsd32_oldlen, oldlenp, 235 sizeof(netbsd32_oldlen)); 236 if (error == 0) 237 error = nerror; 238 } 239 240 /* 241 * if the only problem is that we weren't given enough space, 242 * that's an ENOMEM error 243 */ 244 if (error == 0 && oldp != NULL && savelen < oldlen) 245 error = ENOMEM; 246 247 return (error); 248 } 249
Indexes created Mon Sep 29 21:09:56 GMT 2025