netbsd32_sysctl.c revision 1.43
1 /* $NetBSD: netbsd32_sysctl.c,v 1.43 2020/03/17 17:16:26 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 1.43 2020/03/17 17:16:26 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 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 61 #if defined(DDB) 62 #include <ddb/ddbvar.h> 63 #endif 64 65 struct sysctlnode netbsd32_sysctl_root = { 66 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, 67 .sysctl_num = 0, 68 .sysctl_name = "(netbsd32_root)", 69 .sysctl_size = sizeof(struct sysctlnode), 70 }; 71 72 /* 73 * sysctl helper routine for netbsd32's kern.boottime node 74 */ 75 static int 76 netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) 77 { 78 struct sysctlnode node; 79 struct netbsd32_timespec bt32; 80 struct timespec ts; 81 82 getnanoboottime(&ts); 83 netbsd32_from_timespec(&ts, &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 static int 107 sysctl_hw_machine_arch32(SYSCTLFN_ARGS) 108 { 109 struct sysctlnode node = *rnode; 110 #ifndef PROC_MACHINE_ARCH32 111 extern const char machine_arch32[]; 112 #define PROC_MACHINE_ARCH32(P) __UNCONST(machine_arch32) 113 #endif 114 115 node.sysctl_data = PROC_MACHINE_ARCH32(l->l_proc); 116 node.sysctl_size = strlen(node.sysctl_data) + 1; 117 return sysctl_lookup(SYSCTLFN_CALL(&node)); 118 } 119 120 SYSCTL_SETUP(netbsd32_sysctl_emul_setup, "netbsd32 shadow tree") 121 { 122 const struct sysctlnode *_root = &netbsd32_sysctl_root; 123 extern const char machine32[]; 124 125 sysctl_createv(clog, 0, &_root, NULL, 126 CTLFLAG_PERMANENT, 127 CTLTYPE_NODE, "kern", NULL, 128 NULL, 0, NULL, 0, 129 CTL_KERN, CTL_EOL); 130 sysctl_createv(clog, 0, &_root, NULL, 131 CTLFLAG_PERMANENT, 132 CTLTYPE_STRUCT, "boottime", NULL, 133 netbsd32_sysctl_kern_boottime, 0, NULL, 134 sizeof(struct netbsd32_timeval), 135 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 136 137 sysctl_createv(clog, 0, &_root, NULL, 138 CTLFLAG_PERMANENT, 139 CTLTYPE_NODE, "vm", NULL, 140 NULL, 0, NULL, 0, 141 CTL_VM, CTL_EOL); 142 sysctl_createv(clog, 0, &_root, NULL, 143 CTLFLAG_PERMANENT, 144 CTLTYPE_STRUCT, "loadavg", NULL, 145 netbsd32_sysctl_vm_loadavg, 0, NULL, 146 sizeof(struct netbsd32_loadavg), 147 CTL_VM, VM_LOADAVG, CTL_EOL); 148 sysctl_createv(clog, 0, &_root, NULL, 149 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 150 CTLTYPE_INT, "maxaddress", 151 SYSCTL_DESCR("Maximum user address"), 152 NULL, VM_MAXUSER_ADDRESS32, NULL, 0, 153 CTL_VM, VM_MAXADDRESS, CTL_EOL); 154 sysctl_createv(clog, 0, &_root, NULL, 155 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 156 CTLTYPE_INT, "minaddress", 157 SYSCTL_DESCR("Minimum user address"), 158 NULL, VM_MIN_ADDRESS, NULL, 0, 159 CTL_VM, VM_MINADDRESS, CTL_EOL); 160 161 sysctl_createv(clog, 0, &_root, NULL, 162 CTLFLAG_PERMANENT, 163 CTLTYPE_NODE, "hw", NULL, 164 NULL, 0, NULL, 0, 165 CTL_HW, CTL_EOL); 166 sysctl_createv(clog, 0, &_root, NULL, 167 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 168 CTLTYPE_INT, "alignbytes", NULL, 169 NULL, ALIGNBYTES32, NULL, 0, 170 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 171 sysctl_createv(clog, 0, &_root, NULL, 172 CTLFLAG_PERMANENT, 173 CTLTYPE_STRING, "machine", NULL, 174 NULL, 0, __UNCONST(&machine32), 0, 175 CTL_HW, HW_MACHINE, CTL_EOL); 176 sysctl_createv(clog, 0, &_root, NULL, 177 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 178 CTLTYPE_STRING, "machine_arch", NULL, 179 sysctl_hw_machine_arch32, 0, NULL, 0, 180 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 181 } 182 183 int 184 netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) 185 { 186 /* { 187 syscallarg(netbsd32_intp) name; 188 syscallarg(u_int) namelen; 189 syscallarg(netbsd32_voidp) old; 190 syscallarg(netbsd32_size_tp) oldlenp; 191 syscallarg(netbsd32_voidp) new; 192 syscallarg(netbsd32_size_t) newlen; 193 } */ 194 const struct sysctlnode *pnode; 195 netbsd32_size_t netbsd32_oldlen; 196 size_t oldlen, *oldlenp, savelen; 197 int name[CTL_MAXNAME], error, nerror, *namep; 198 void *newp, *oldp; 199 200 /* 201 * get and convert 32 bit size_t to native size_t 202 */ 203 namep = SCARG_P32(uap, name); 204 oldp = SCARG_P32(uap, oldv); 205 newp = SCARG_P32(uap, newv); 206 oldlenp = SCARG_P32(uap, oldlenp); 207 oldlen = 0; 208 if (oldlenp != NULL) { 209 error = copyin(oldlenp, &netbsd32_oldlen, 210 sizeof(netbsd32_oldlen)); 211 if (error) 212 return (error); 213 oldlen = netbsd32_oldlen; 214 } 215 savelen = oldlen; 216 217 /* 218 * retrieve name and see if we need to dispatch this query to 219 * the shadow tree. if we find it in the shadow tree, 220 * dispatch to there, otherwise NULL means use the built-in 221 * default main tree. 222 */ 223 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) 224 return (EINVAL); 225 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); 226 if (error) 227 return (error); 228 229 ktrmib(name, SCARG(uap, namelen)); 230 231 sysctl_lock(newp != NULL); 232 pnode = &netbsd32_sysctl_root; 233 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); 234 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; 235 error = sysctl_dispatch(&name[0], SCARG(uap, namelen), 236 oldp, &oldlen, 237 newp, SCARG(uap, newlen), 238 &name[0], l, pnode); 239 sysctl_unlock(); 240 241 /* 242 * reset caller's oldlen, even if we got an error 243 */ 244 if (oldlenp) { 245 netbsd32_oldlen = oldlen; 246 nerror = copyout(&netbsd32_oldlen, oldlenp, 247 sizeof(netbsd32_oldlen)); 248 if (error == 0) 249 error = nerror; 250 } 251 252 /* 253 * if the only problem is that we weren't given enough space, 254 * that's an ENOMEM error 255 */ 256 if (error == 0 && oldp != NULL && savelen < oldlen) 257 error = ENOMEM; 258 259 return (error); 260 } 261
Indexes created Mon Sep 29 21:09:56 GMT 2025