netbsd32_sysctl.c revision 1.30
1 /* $NetBSD: netbsd32_sysctl.c,v 1.30 2009/01/11 02:45:49 christos 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 1.30 2009/01/11 02:45:49 christos 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/syscallargs.h> 50 #include <sys/proc.h> 51 #include <sys/sysctl.h> 52 #include <sys/dirent.h> 53 #include <sys/ktrace.h> 54 55 #include <uvm/uvm_extern.h> 56 57 #include <compat/netbsd32/netbsd32.h> 58 #include <compat/netbsd32/netbsd32_syscall.h> 59 #include <compat/netbsd32/netbsd32_syscallargs.h> 60 #include <compat/netbsd32/netbsd32_conv.h> 61 #include <compat/netbsd32/netbsd32_sysctl.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 static struct sysctllog *netbsd32_clog; 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_timespec bt32; 84 85 netbsd32_from_timespec(&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 void 109 netbsd32_sysctl_init(void) 110 { 111 const struct sysctlnode *_root = &netbsd32_sysctl_root; 112 extern const char machine_arch32[]; 113 extern const char machine32[]; 114 115 sysctl_createv(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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(&netbsd32_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 void 157 netbsd32_sysctl_fini(void) 158 { 159 160 sysctl_teardown(&netbsd32_clog); 161 sysctl_free(&netbsd32_sysctl_root); 162 } 163 164 int 165 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 166 { 167 /* { 168 syscallarg(netbsd32_intp) name; 169 syscallarg(u_int) namelen; 170 syscallarg(netbsd32_voidp) old; 171 syscallarg(netbsd32_size_tp) oldlenp; 172 syscallarg(netbsd32_voidp) new; 173 syscallarg(netbsd32_size_t) newlen; 174 } */ 175 const struct sysctlnode *pnode; 176 netbsd32_size_t netbsd32_oldlen; 177 size_t oldlen, *oldlenp, savelen; 178 int name[CTL_MAXNAME], error, nerror, *namep; 179 void *newp, *oldp; 180 181 /* 182 * get and convert 32 bit size_t to native size_t 183 */ 184 namep = SCARG_P32(uap, name); 185 oldp = SCARG_P32(uap, old); 186 newp = SCARG_P32(uap, new); 187 oldlenp = SCARG_P32(uap, oldlenp); 188 oldlen = 0; 189 if (oldlenp != NULL) { 190 error = copyin(oldlenp, &netbsd32_oldlen, 191 sizeof(netbsd32_oldlen)); 192 if (error) 193 return (error); 194 oldlen = netbsd32_oldlen; 195 } 196 savelen = oldlen; 197 198 /* 199 * retrieve name and see if we need to dispatch this query to 200 * the shadow tree. if we find it in the shadow tree, 201 * dispatch to there, otherwise NULL means use the built-in 202 * default main tree. 203 */ 204 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 205 return (EINVAL); 206 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 207 if (error) 208 return (error); 209 210 ktrmib(name, SCARG(uap, namelen)); 211 212 sysctl_lock(newp != NULL); 213 pnode = &netbsd32_sysctl_root; 214 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 215 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 216 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 217 oldp, &oldlen, 218 newp, SCARG(uap, newlen), 219 &name[0], l, pnode); 220 sysctl_unlock(); 221 222 /* 223 * reset caller's oldlen, even if we got an error 224 */ 225 if (oldlenp) { 226 netbsd32_oldlen = oldlen; 227 nerror = copyout(&netbsd32_oldlen, oldlenp, 228 sizeof(netbsd32_oldlen)); 229 if (error == 0) 230 error = nerror; 231 } 232 233 /* 234 * if the only problem is that we weren't given enough space, 235 * that's an ENOMEM error 236 */ 237 if (error == 0 && oldp != NULL && savelen < oldlen) 238 error = ENOMEM; 239 240 return (error); 241 } 242
Indexes created Mon Sep 29 21:09:56 GMT 2025