netbsd32_sysctl.c revision 1.28.12.1
1 /* $NetBSD: netbsd32_sysctl.c,v 1.28.12.1 2008/05/10 23:48:58 wrstuden 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 1.28.12.1 2008/05/10 23:48:58 wrstuden 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 #include <sys/dirent.h> 54 #include <sys/ktrace.h> 55 56 #include <uvm/uvm_extern.h> 57 58 #include <compat/netbsd32/netbsd32.h> 59 #include <compat/netbsd32/netbsd32_syscall.h> 60 #include <compat/netbsd32/netbsd32_syscallargs.h> 61 #include <compat/netbsd32/netbsd32_conv.h> 62 63 #if defined(DDB) 64 #include <ddb/ddbvar.h> 65 #endif 66 67 struct sysctlnode netbsd32_sysctl_root = { 68 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, 69 .sysctl_num = 0, 70 .sysctl_name = "(netbsd32_root)", 71 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 72 }; 73 74 /* 75 * sysctl helper routine for netbsd32's kern.boottime node 76 */ 77 static int 78 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 79 { 80 struct sysctlnode node; 81 struct netbsd32_timeval bt32; 82 83 netbsd32_from_timeval(&boottime, &bt32); 84 85 node = *rnode; 86 node.sysctl_data = &bt32; 87 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 88 } 89 90 /* 91 * sysctl helper routine for netbsd32's vm.loadavg node 92 */ 93 static int 94 netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) 95 { 96 struct sysctlnode node; 97 struct netbsd32_loadavg av32; 98 99 netbsd32_from_loadavg(&av32, &averunnable); 100 101 node = *rnode; 102 node.sysctl_data = &av32; 103 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 104 } 105 106 SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "sysctl netbsd32 shadow tree setup") 107 { 108 const struct sysctlnode *_root = &netbsd32_sysctl_root; 109 extern const char machine_arch32[]; 110 extern const char machine32[]; 111 112 sysctl_createv(clog, 0, &_root, NULL, 113 CTLFLAG_PERMANENT, 114 CTLTYPE_NODE, "kern", NULL, 115 NULL, 0, NULL, 0, 116 CTL_KERN, CTL_EOL); 117 sysctl_createv(clog, 0, &_root, NULL, 118 CTLFLAG_PERMANENT, 119 CTLTYPE_STRUCT, "boottime", NULL, 120 netbsd32_sysctl_kern_boottime, 0, NULL, 121 sizeof(struct netbsd32_timeval), 122 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 123 124 sysctl_createv(clog, 0, &_root, NULL, 125 CTLFLAG_PERMANENT, 126 CTLTYPE_NODE, "vm", NULL, 127 NULL, 0, NULL, 0, 128 CTL_VM, CTL_EOL); 129 sysctl_createv(clog, 0, &_root, NULL, 130 CTLFLAG_PERMANENT, 131 CTLTYPE_STRUCT, "loadavg", NULL, 132 netbsd32_sysctl_vm_loadavg, 0, NULL, 133 sizeof(struct netbsd32_loadavg), 134 CTL_VM, VM_LOADAVG, CTL_EOL); 135 136 sysctl_createv(clog, 0, &_root, NULL, 137 CTLFLAG_PERMANENT, 138 CTLTYPE_NODE, "hw", NULL, 139 NULL, 0, NULL, 0, 140 CTL_HW, CTL_EOL); 141 sysctl_createv(clog, 0, &_root, NULL, 142 CTLFLAG_PERMANENT, 143 CTLTYPE_STRING, "machine", NULL, 144 NULL, 0, &machine32, 0, 145 CTL_HW, HW_MACHINE, CTL_EOL); 146 sysctl_createv(clog, 0, &_root, NULL, 147 CTLFLAG_PERMANENT, 148 CTLTYPE_STRING, "machine_arch", NULL, 149 NULL, 0, &machine_arch32, 0, 150 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 151 } 152 153 int 154 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 155 { 156 /* { 157 syscallarg(netbsd32_intp) name; 158 syscallarg(u_int) namelen; 159 syscallarg(netbsd32_voidp) old; 160 syscallarg(netbsd32_size_tp) oldlenp; 161 syscallarg(netbsd32_voidp) new; 162 syscallarg(netbsd32_size_t) newlen; 163 } */ 164 const struct sysctlnode *pnode; 165 netbsd32_size_t netbsd32_oldlen; 166 size_t oldlen, *oldlenp, savelen; 167 int name[CTL_MAXNAME], error, nerror, *namep; 168 void *newp, *oldp; 169 170 /* 171 * get and convert 32 bit size_t to native size_t 172 */ 173 namep = SCARG_P32(uap, name); 174 oldp = SCARG_P32(uap, old); 175 newp = SCARG_P32(uap, new); 176 oldlenp = SCARG_P32(uap, oldlenp); 177 oldlen = 0; 178 if (oldlenp != NULL) { 179 error = copyin(oldlenp, &netbsd32_oldlen, 180 sizeof(netbsd32_oldlen)); 181 if (error) 182 return (error); 183 oldlen = netbsd32_oldlen; 184 } 185 savelen = oldlen; 186 187 /* 188 * retrieve name and see if we need to dispatch this query to 189 * the shadow tree. if we find it in the shadow tree, 190 * dispatch to there, otherwise NULL means use the built-in 191 * default main tree. 192 */ 193 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 194 return (EINVAL); 195 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 196 if (error) 197 return (error); 198 199 ktrmib(name, SCARG(uap, namelen)); 200 201 sysctl_lock(newp != NULL); 202 pnode = &netbsd32_sysctl_root; 203 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 204 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 205 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 206 oldp, &oldlen, 207 newp, SCARG(uap, newlen), 208 &name[0], l, pnode); 209 sysctl_unlock(); 210 211 /* 212 * reset caller's oldlen, even if we got an error 213 */ 214 if (oldlenp) { 215 netbsd32_oldlen = oldlen; 216 nerror = copyout(&netbsd32_oldlen, oldlenp, 217 sizeof(netbsd32_oldlen)); 218 if (error == 0) 219 error = nerror; 220 } 221 222 /* 223 * if the only problem is that we weren't given enough space, 224 * that's an ENOMEM error 225 */ 226 if (error == 0 && oldp != NULL && savelen < oldlen) 227 error = ENOMEM; 228 229 return (error); 230 } 231
Indexes created Mon Sep 29 21:09:56 GMT 2025