1 /* $NetBSD: netbsd32_sysctl.c,v 1.38 2017/10/31 16:10:25 kre 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 1.38 2017/10/31 16:10:25 kre 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 .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 static int 108 sysctl_hw_machine_arch32(SYSCTLFN_ARGS) 109 { 110 struct sysctlnode node = *rnode; 111 #ifndef PROC_MACHINE_ARCH32 112 extern const char machine_arch32[]; 113 #define PROC_MACHINE_ARCH32(P) __UNCONST(machine_arch32) 114 #endif 115 116 node.sysctl_data = PROC_MACHINE_ARCH32(l->l_proc); 117 node.sysctl_size = strlen(node.sysctl_data) + 1; 118 return sysctl_lookup(SYSCTLFN_CALL(&node)); 119 } 120 121 void 122 netbsd32_sysctl_init(void) 123 { 124 const struct sysctlnode *_root = &netbsd32_sysctl_root; 125 extern const char machine32[]; 126 127 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 128 CTLFLAG_PERMANENT, 129 CTLTYPE_NODE, "kern", NULL, 130 NULL, 0, NULL, 0, 131 CTL_KERN, CTL_EOL); 132 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 133 CTLFLAG_PERMANENT, 134 CTLTYPE_STRUCT, "boottime", NULL, 135 netbsd32_sysctl_kern_boottime, 0, NULL, 136 sizeof(struct netbsd32_timeval), 137 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 138 139 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 140 CTLFLAG_PERMANENT, 141 CTLTYPE_NODE, "vm", NULL, 142 NULL, 0, NULL, 0, 143 CTL_VM, CTL_EOL); 144 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 145 CTLFLAG_PERMANENT, 146 CTLTYPE_STRUCT, "loadavg", NULL, 147 netbsd32_sysctl_vm_loadavg, 0, NULL, 148 sizeof(struct netbsd32_loadavg), 149 CTL_VM, VM_LOADAVG, CTL_EOL); 150 151 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 152 CTLFLAG_PERMANENT, 153 CTLTYPE_NODE, "hw", NULL, 154 NULL, 0, NULL, 0, 155 CTL_HW, CTL_EOL); 156 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 157 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 158 CTLTYPE_INT, "alignbytes", NULL, 159 NULL, ALIGNBYTES32, NULL, 0, 160 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 161 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 162 CTLFLAG_PERMANENT, 163 CTLTYPE_STRING, "machine", NULL, 164 NULL, 0, __UNCONST(&machine32), 0, 165 CTL_HW, HW_MACHINE, CTL_EOL); 166 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 167 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 168 CTLTYPE_STRING, "machine_arch", NULL, 169 sysctl_hw_machine_arch32, 0, NULL, 0, 170 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 171 } 172 173 void 174 netbsd32_sysctl_fini(void) 175 { 176 177 sysctl_teardown(&netbsd32_clog); 178 sysctl_free(&netbsd32_sysctl_root); 179 } 180 181 int 182 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 183 { 184 /* { 185 syscallarg(netbsd32_intp) name; 186 syscallarg(u_int) namelen; 187 syscallarg(netbsd32_voidp) old; 188 syscallarg(netbsd32_size_tp) oldlenp; 189 syscallarg(netbsd32_voidp) new; 190 syscallarg(netbsd32_size_t) newlen; 191 } */ 192 const struct sysctlnode *pnode; 193 netbsd32_size_t netbsd32_oldlen; 194 size_t oldlen, *oldlenp, savelen; 195 int name[CTL_MAXNAME], error, nerror, *namep; 196 void *newp, *oldp; 197 198 /* 199 * get and convert 32 bit size_t to native size_t 200 */ 201 namep = SCARG_P32(uap, name); 202 oldp = SCARG_P32(uap, oldv); 203 newp = SCARG_P32(uap, newv); 204 oldlenp = SCARG_P32(uap, oldlenp); 205 oldlen = 0; 206 if (oldlenp != NULL) { 207 error = copyin(oldlenp, &netbsd32_oldlen, 208 sizeof(netbsd32_oldlen)); 209 if (error) 210 return (error); 211 oldlen = netbsd32_oldlen; 212 } 213 savelen = oldlen; 214 215 /* 216 * retrieve name and see if we need to dispatch this query to 217 * the shadow tree. if we find it in the shadow tree, 218 * dispatch to there, otherwise NULL means use the built-in 219 * default main tree. 220 */ 221 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 222 return (EINVAL); 223 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 224 if (error) 225 return (error); 226 227 ktrmib(name, SCARG(uap, namelen)); 228 229 sysctl_lock(newp != NULL); 230 pnode = &netbsd32_sysctl_root; 231 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 232 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 233 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 234 oldp, &oldlen, 235 newp, SCARG(uap, newlen), 236 &name[0], l, pnode); 237 sysctl_unlock(); 238 239 /* 240 * reset caller's oldlen, even if we got an error 241 */ 242 if (oldlenp) { 243 netbsd32_oldlen = oldlen; 244 nerror = copyout(&netbsd32_oldlen, oldlenp, 245 sizeof(netbsd32_oldlen)); 246 if (error == 0) 247 error = nerror; 248 } 249 250 /* 251 * if the only problem is that we weren't given enough space, 252 * that's an ENOMEM error 253 */ 254 if (error == 0 && oldp != NULL && savelen < oldlen) 255 error = ENOMEM; 256 257 return (error); 258 } 259