netbsd32_sysctl.c revision 1.32
1 /* $NetBSD: netbsd32_sysctl.c,v 1.32 2011/05/23 21:34:01 joerg 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 1.32 2011/05/23 21:34:01 joerg 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/mount.h> 45 #include <sys/stat.h> 46 #include <sys/time.h> 47 #include <sys/vnode.h> 48 #include <sys/syscallargs.h> 49 #include <sys/proc.h> 50 #include <sys/sysctl.h> 51 #include <sys/dirent.h> 52 #include <sys/ktrace.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 #include <compat/netbsd32/netbsd32_sysctl.h> 61 62 #if defined(DDB) 63 #include <ddb/ddbvar.h> 64 #endif 65 66 struct sysctlnode netbsd32_sysctl_root = { 67 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, 68 .sysctl_num = 0, 69 .sysctl_name = "(netbsd32_root)", 70 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 71 }; 72 73 static struct sysctllog *netbsd32_clog; 74 75 /* 76 * sysctl helper routine for netbsd32's kern.boottime node 77 */ 78 static int 79 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 80 { 81 struct sysctlnode node; 82 struct netbsd32_timespec bt32; 83 84 netbsd32_from_timespec(&boottime, &bt32); 85 86 node = *rnode; 87 node.sysctl_data = &bt32; 88 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 89 } 90 91 /* 92 * sysctl helper routine for netbsd32's vm.loadavg node 93 */ 94 static int 95 netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) 96 { 97 struct sysctlnode node; 98 struct netbsd32_loadavg av32; 99 100 netbsd32_from_loadavg(&av32, &averunnable); 101 102 node = *rnode; 103 node.sysctl_data = &av32; 104 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 105 } 106 107 void 108 netbsd32_sysctl_init(void) 109 { 110 const struct sysctlnode *_root = &netbsd32_sysctl_root; 111 extern const char machine_arch32[]; 112 extern const char machine32[]; 113 114 sysctl_createv(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_clog, 0, &_root, NULL, 144 CTLFLAG_PERMANENT, 145 CTLTYPE_STRING, "machine", NULL, 146 NULL, 0, __UNCONST(&machine32), 0, 147 CTL_HW, HW_MACHINE, CTL_EOL); 148 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 149 CTLFLAG_PERMANENT, 150 CTLTYPE_STRING, "machine_arch", NULL, 151 NULL, 0, __UNCONST(&machine_arch32), 0, 152 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 153 } 154 155 void 156 netbsd32_sysctl_fini(void) 157 { 158 159 sysctl_teardown(&netbsd32_clog); 160 sysctl_free(&netbsd32_sysctl_root); 161 } 162 163 int 164 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 165 { 166 /* { 167 syscallarg(netbsd32_intp) name; 168 syscallarg(u_int) namelen; 169 syscallarg(netbsd32_voidp) old; 170 syscallarg(netbsd32_size_tp) oldlenp; 171 syscallarg(netbsd32_voidp) new; 172 syscallarg(netbsd32_size_t) newlen; 173 } */ 174 const struct sysctlnode *pnode; 175 netbsd32_size_t netbsd32_oldlen; 176 size_t oldlen, *oldlenp, savelen; 177 int name[CTL_MAXNAME], error, nerror, *namep; 178 void *newp, *oldp; 179 180 /* 181 * get and convert 32 bit size_t to native size_t 182 */ 183 namep = SCARG_P32(uap, name); 184 oldp = SCARG_P32(uap, old); 185 newp = SCARG_P32(uap, new); 186 oldlenp = SCARG_P32(uap, oldlenp); 187 oldlen = 0; 188 if (oldlenp != NULL) { 189 error = copyin(oldlenp, &netbsd32_oldlen, 190 sizeof(netbsd32_oldlen)); 191 if (error) 192 return (error); 193 oldlen = netbsd32_oldlen; 194 } 195 savelen = oldlen; 196 197 /* 198 * retrieve name and see if we need to dispatch this query to 199 * the shadow tree. if we find it in the shadow tree, 200 * dispatch to there, otherwise NULL means use the built-in 201 * default main tree. 202 */ 203 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 204 return (EINVAL); 205 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 206 if (error) 207 return (error); 208 209 ktrmib(name, SCARG(uap, namelen)); 210 211 sysctl_lock(newp != NULL); 212 pnode = &netbsd32_sysctl_root; 213 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 214 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 215 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 216 oldp, &oldlen, 217 newp, SCARG(uap, newlen), 218 &name[0], l, pnode); 219 sysctl_unlock(); 220 221 /* 222 * reset caller's oldlen, even if we got an error 223 */ 224 if (oldlenp) { 225 netbsd32_oldlen = oldlen; 226 nerror = copyout(&netbsd32_oldlen, oldlenp, 227 sizeof(netbsd32_oldlen)); 228 if (error == 0) 229 error = nerror; 230 } 231 232 /* 233 * if the only problem is that we weren't given enough space, 234 * that's an ENOMEM error 235 */ 236 if (error == 0 && oldp != NULL && savelen < oldlen) 237 error = ENOMEM; 238 239 return (error); 240 } 241
Indexes created Sun Sep 21 20:09:37 GMT 2025