1 /* $NetBSD: netbsd32_sysctl.c,v 1.22 2006/09/23 22:12:00 manu 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 1.22 2006/09/23 22:12:00 manu 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/sa.h> 51 #include <sys/syscallargs.h> 52 #include <sys/proc.h> 53 #include <sys/sysctl.h> 54 #include <sys/dirent.h> 55 #ifdef KTRACE 56 #include <sys/ktrace.h> 57 #endif 58 59 #include <uvm/uvm_extern.h> 60 61 #include <compat/netbsd32/netbsd32.h> 62 #include <compat/netbsd32/netbsd32_syscall.h> 63 #include <compat/netbsd32/netbsd32_syscallargs.h> 64 #include <compat/netbsd32/netbsd32_conv.h> 65 66 #if defined(DDB) 67 #include <ddb/ddbvar.h> 68 #endif 69 70 struct sysctlnode netbsd32_sysctl_root = { 71 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, 72 .sysctl_num = 0, 73 .sysctl_name = "(netbsd32_root)", 74 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 75 }; 76 77 /* 78 * sysctl helper routine for netbsd32's kern.boottime node 79 */ 80 static int 81 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 82 { 83 struct sysctlnode node; 84 struct netbsd32_timeval bt32; 85 86 netbsd32_from_timeval(&boottime, &bt32); 87 88 node = *rnode; 89 node.sysctl_data = &bt32; 90 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 91 } 92 93 /* 94 * sysctl helper routine for netbsd32's vm.loadavg node 95 */ 96 static int 97 netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) 98 { 99 struct sysctlnode node; 100 struct netbsd32_loadavg av32; 101 102 netbsd32_from_loadavg(&av32, &averunnable); 103 104 node = *rnode; 105 node.sysctl_data = &av32; 106 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 107 } 108 109 SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "sysctl netbsd32 shadow tree setup") 110 { 111 const struct sysctlnode *_root = &netbsd32_sysctl_root; 112 extern const char machine_arch32[]; 113 extern const char machine32[]; 114 115 sysctl_createv(clog, 0, &_root, NULL, 116 CTLFLAG_PERMANENT, 117 CTLTYPE_NODE, "kern", NULL, 118 NULL, 0, NULL, 0, 119 CTL_KERN, CTL_EOL); 120 sysctl_createv(clog, 0, &_root, NULL, 121 CTLFLAG_PERMANENT, 122 CTLTYPE_STRUCT, "boottime", NULL, 123 netbsd32_sysctl_kern_boottime, 0, NULL, 124 sizeof(struct netbsd32_timeval), 125 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 126 127 sysctl_createv(clog, 0, &_root, NULL, 128 CTLFLAG_PERMANENT, 129 CTLTYPE_NODE, "vm", NULL, 130 NULL, 0, NULL, 0, 131 CTL_VM, CTL_EOL); 132 sysctl_createv(clog, 0, &_root, NULL, 133 CTLFLAG_PERMANENT, 134 CTLTYPE_STRUCT, "loadavg", NULL, 135 netbsd32_sysctl_vm_loadavg, 0, NULL, 136 sizeof(struct netbsd32_loadavg), 137 CTL_VM, VM_LOADAVG, CTL_EOL); 138 139 sysctl_createv(clog, 0, &_root, NULL, 140 CTLFLAG_PERMANENT, 141 CTLTYPE_NODE, "hw", NULL, 142 NULL, 0, NULL, 0, 143 CTL_HW, CTL_EOL); 144 sysctl_createv(clog, 0, &_root, NULL, 145 CTLFLAG_PERMANENT, 146 CTLTYPE_STRING, "machine", NULL, 147 NULL, 0, &machine32, 0, 148 CTL_HW, HW_MACHINE, CTL_EOL); 149 sysctl_createv(clog, 0, &_root, NULL, 150 CTLFLAG_PERMANENT, 151 CTLTYPE_STRING, "machine_arch", NULL, 152 NULL, 0, &machine_arch32, 0, 153 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 154 } 155 156 int 157 netbsd32___sysctl(l, v, retval) 158 struct lwp *l; 159 void *v; 160 register_t *retval; 161 { 162 struct netbsd32___sysctl_args /* { 163 syscallarg(netbsd32_intp) name; 164 syscallarg(u_int) namelen; 165 syscallarg(netbsd32_voidp) old; 166 syscallarg(netbsd32_size_tp) oldlenp; 167 syscallarg(netbsd32_voidp) new; 168 syscallarg(netbsd32_size_t) newlen; 169 } */ *uap = v; 170 const struct sysctlnode *pnode; 171 netbsd32_size_t netbsd32_oldlen; 172 size_t oldlen, *oldlenp, savelen; 173 int name[CTL_MAXNAME], error, nerror, *namep; 174 void *newp, *oldp; 175 176 /* 177 * get and convert 32 bit size_t to native size_t 178 */ 179 namep = NETBSD32PTR64(SCARG(uap, name)); 180 oldp = NETBSD32PTR64(SCARG(uap, old)); 181 newp = NETBSD32PTR64(SCARG(uap, new)); 182 oldlenp = NETBSD32PTR64(SCARG(uap, oldlenp)); 183 oldlen = 0; 184 if (oldlenp != NULL) { 185 error = copyin(oldlenp, &netbsd32_oldlen, 186 sizeof(netbsd32_oldlen)); 187 if (error) 188 return (error); 189 oldlen = netbsd32_oldlen; 190 } 191 savelen = oldlen; 192 193 /* 194 * retrieve name and see if we need to dispatch this query to 195 * the shadow tree. if we find it in the shadow tree, 196 * dispatch to there, otherwise NULL means use the built-in 197 * default main tree. 198 */ 199 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 200 return (EINVAL); 201 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 202 if (error) 203 return (error); 204 205 #ifdef KTRACE 206 if (KTRPOINT(l->l_proc, KTR_MIB)) 207 ktrmib(l, name, SCARG(uap, namelen)); 208 #endif 209 210 /* 211 * wire old so that copyout() is less likely to fail? 212 */ 213 error = sysctl_lock(l, oldp, savelen); 214 if (error) 215 return (error); 216 217 pnode = &netbsd32_sysctl_root; 218 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 219 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 220 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 221 oldp, &oldlen, 222 newp, SCARG(uap, newlen), 223 &name[0], l, pnode); 224 225 /* 226 * release the sysctl lock 227 */ 228 sysctl_unlock(l); 229 230 /* 231 * reset caller's oldlen, even if we got an error 232 */ 233 if (oldlenp) { 234 netbsd32_oldlen = oldlen; 235 nerror = copyout(&netbsd32_oldlen, oldlenp, 236 sizeof(netbsd32_oldlen)); 237 if (error == 0) 238 error = nerror; 239 } 240 241 /* 242 * if the only problem is that we weren't given enough space, 243 * that's an ENOMEM error 244 */ 245 if (error == 0 && oldp != NULL && savelen < oldlen) 246 error = ENOMEM; 247 248 return (error); 249 } 250