netbsd32_sysctl.c revision 1.38.2.4
1 /* $NetBSD: netbsd32_sysctl.c,v 1.38.2.4 2019/01/24 04:31:19 pgoyette 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 1.38.2.4 2019/01/24 04:31:19 pgoyette 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 #include <sys/compat_stub.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 .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 static int 109 sysctl_hw_machine_arch32(SYSCTLFN_ARGS) 110 { 111 struct sysctlnode node = *rnode; 112 #ifndef PROC_MACHINE_ARCH32 113 extern const char machine_arch32[]; 114 #define PROC_MACHINE_ARCH32(P) __UNCONST(machine_arch32) 115 #endif 116 117 node.sysctl_data = PROC_MACHINE_ARCH32(l->l_proc); 118 node.sysctl_size = strlen(node.sysctl_data) + 1; 119 return sysctl_lookup(SYSCTLFN_CALL(&node)); 120 } 121 122 void 123 netbsd32_sysctl_init(void) 124 { 125 const struct sysctlnode *_root = &netbsd32_sysctl_root; 126 const char *m; 127 128 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 129 CTLFLAG_PERMANENT, 130 CTLTYPE_NODE, "kern", NULL, 131 NULL, 0, NULL, 0, 132 CTL_KERN, CTL_EOL); 133 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 134 CTLFLAG_PERMANENT, 135 CTLTYPE_STRUCT, "boottime", NULL, 136 netbsd32_sysctl_kern_boottime, 0, NULL, 137 sizeof(struct netbsd32_timeval), 138 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 139 140 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 141 CTLFLAG_PERMANENT, 142 CTLTYPE_NODE, "vm", NULL, 143 NULL, 0, NULL, 0, 144 CTL_VM, CTL_EOL); 145 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 146 CTLFLAG_PERMANENT, 147 CTLTYPE_STRUCT, "loadavg", NULL, 148 netbsd32_sysctl_vm_loadavg, 0, NULL, 149 sizeof(struct netbsd32_loadavg), 150 CTL_VM, VM_LOADAVG, CTL_EOL); 151 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 152 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 153 CTLTYPE_INT, "maxaddress", 154 SYSCTL_DESCR("Maximum user address"), 155 NULL, VM_MAXUSER_ADDRESS32, NULL, 0, 156 CTL_VM, VM_MAXADDRESS, CTL_EOL); 157 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 158 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 159 CTLTYPE_INT, "minaddress", 160 SYSCTL_DESCR("Minimum user address"), 161 NULL, VM_MIN_ADDRESS, NULL, 0, 162 CTL_VM, VM_MINADDRESS, CTL_EOL); 163 164 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 165 CTLFLAG_PERMANENT, 166 CTLTYPE_NODE, "hw", NULL, 167 NULL, 0, NULL, 0, 168 CTL_HW, CTL_EOL); 169 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 170 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 171 CTLTYPE_INT, "alignbytes", NULL, 172 NULL, ALIGNBYTES32, NULL, 0, 173 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 174 MODULE_CALL_HOOK(netbsd32_machine_32_hook, (), machine, m); 175 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 176 CTLFLAG_PERMANENT, 177 CTLTYPE_STRING, "machine", NULL, 178 NULL, 0, __UNCONST(m), 0, 179 CTL_HW, HW_MACHINE, CTL_EOL); 180 sysctl_createv(&netbsd32_clog, 0, &_root, NULL, 181 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 182 CTLTYPE_STRING, "machine_arch", NULL, 183 sysctl_hw_machine_arch32, 0, NULL, 0, 184 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 185 } 186 187 void 188 netbsd32_sysctl_fini(void) 189 { 190 191 sysctl_teardown(&netbsd32_clog); 192 sysctl_free(&netbsd32_sysctl_root); 193 } 194 195 int 196 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 197 { 198 /* { 199 syscallarg(netbsd32_intp) name; 200 syscallarg(u_int) namelen; 201 syscallarg(netbsd32_voidp) old; 202 syscallarg(netbsd32_size_tp) oldlenp; 203 syscallarg(netbsd32_voidp) new; 204 syscallarg(netbsd32_size_t) newlen; 205 } */ 206 const struct sysctlnode *pnode; 207 netbsd32_size_t netbsd32_oldlen; 208 size_t oldlen, *oldlenp, savelen; 209 int name[CTL_MAXNAME], error, nerror, *namep; 210 void *newp, *oldp; 211 212 /* 213 * get and convert 32 bit size_t to native size_t 214 */ 215 namep = SCARG_P32(uap, name); 216 oldp = SCARG_P32(uap, oldv); 217 newp = SCARG_P32(uap, newv); 218 oldlenp = SCARG_P32(uap, oldlenp); 219 oldlen = 0; 220 if (oldlenp != NULL) { 221 error = copyin(oldlenp, &netbsd32_oldlen, 222 sizeof(netbsd32_oldlen)); 223 if (error) 224 return (error); 225 oldlen = netbsd32_oldlen; 226 } 227 savelen = oldlen; 228 229 /* 230 * retrieve name and see if we need to dispatch this query to 231 * the shadow tree. if we find it in the shadow tree, 232 * dispatch to there, otherwise NULL means use the built-in 233 * default main tree. 234 */ 235 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 236 return (EINVAL); 237 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 238 if (error) 239 return (error); 240 241 ktrmib(name, SCARG(uap, namelen)); 242 243 sysctl_lock(newp != NULL); 244 pnode = &netbsd32_sysctl_root; 245 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 246 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 247 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 248 oldp, &oldlen, 249 newp, SCARG(uap, newlen), 250 &name[0], l, pnode); 251 sysctl_unlock(); 252 253 /* 254 * reset caller's oldlen, even if we got an error 255 */ 256 if (oldlenp) { 257 netbsd32_oldlen = oldlen; 258 nerror = copyout(&netbsd32_oldlen, oldlenp, 259 sizeof(netbsd32_oldlen)); 260 if (error == 0) 261 error = nerror; 262 } 263 264 /* 265 * if the only problem is that we weren't given enough space, 266 * that's an ENOMEM error 267 */ 268 if (error == 0 && oldp != NULL && savelen < oldlen) 269 error = ENOMEM; 270 271 return (error); 272 } 273
Indexes created Mon Sep 29 21:09:56 GMT 2025