linux_sysctl.c revision 1.25.2.1
1 /* $NetBSD: linux_sysctl.c,v 1.25.2.1 2007/03/24 14:55:09 yamt 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * sysctl system call. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.25.2.1 2007/03/24 14:55:09 yamt Exp $"); 45 46 #if defined (_KERNEL_OPT) 47 #include "opt_ktrace.h" 48 #endif 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/errno.h> 53 #include <sys/proc.h> 54 #include <sys/mount.h> 55 #include <sys/sysctl.h> 56 #include <sys/syscallargs.h> 57 #ifdef KTRACE 58 #include <sys/ktrace.h> 59 #endif 60 61 #include <compat/linux/common/linux_types.h> 62 #include <compat/linux/common/linux_signal.h> 63 64 #include <compat/linux/linux_syscallargs.h> 65 #include <compat/linux/common/linux_sysctl.h> 66 #include <compat/linux/common/linux_exec.h> 67 68 char linux_sysname[128] = "Linux"; 69 #if defined(__amd64__) || defined(__i386__) || defined(__powerpc__) 70 char linux_release[128] = "2.4.18"; 71 char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 72 #else 73 char linux_release[128] = "2.0.38"; 74 char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000"; 75 #endif 76 char linux_machine[128] = ""; 77 78 #ifndef _LKM 79 static 80 #endif 81 struct sysctlnode linux_sysctl_root = { 82 .sysctl_flags = SYSCTL_VERSION| 83 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 84 .sysctl_num = 0, 85 .sysctl_name = "(linux_root)", 86 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 87 }; 88 89 /* 90 * setup for small sysctl tree used by emulation 91 */ 92 SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup") 93 { 94 const struct sysctlnode *node = &linux_sysctl_root; 95 96 sysctl_createv(clog, 0, &node, &node, 97 CTLFLAG_PERMANENT, 98 CTLTYPE_NODE, "kern", NULL, 99 NULL, 0, NULL, 0, 100 LINUX_CTL_KERN, CTL_EOL); 101 102 sysctl_createv(clog, 0, &node, NULL, 103 CTLFLAG_PERMANENT, 104 CTLTYPE_STRING, "ostype", NULL, 105 NULL, 0, linux_sysname, sizeof(linux_sysname), 106 LINUX_KERN_OSTYPE, CTL_EOL); 107 sysctl_createv(clog, 0, &node, NULL, 108 CTLFLAG_PERMANENT, 109 CTLTYPE_STRING, "osrelease", NULL, 110 NULL, 0, linux_release, sizeof(linux_release), 111 LINUX_KERN_OSRELEASE, CTL_EOL); 112 sysctl_createv(clog, 0, &node, NULL, 113 CTLFLAG_PERMANENT, 114 CTLTYPE_STRING, "version", NULL, 115 NULL, 0, linux_version, sizeof(linux_version), 116 LINUX_KERN_VERSION, CTL_EOL); 117 118 #ifndef LINUX_UNAME_ARCH 119 #define LINUX_UNAME_ARCH machine 120 #endif 121 strlcpy(linux_machine, LINUX_UNAME_ARCH, sizeof(linux_machine)); 122 sysctl_createv(clog, 0, &node, NULL, 123 CTLFLAG_PERMANENT, 124 CTLTYPE_STRING, "machine", NULL, 125 NULL, 0, linux_machine, sizeof(linux_machine), 126 LINUX_KERN_VERSION, CTL_EOL); 127 128 linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 129 } 130 131 /* 132 * linux sysctl system call 133 */ 134 int 135 linux_sys___sysctl(struct lwp *l, void *v, register_t *retval) 136 { 137 struct linux_sys___sysctl_args *uap = v; 138 struct linux___sysctl ls; 139 int error, nerror, name[CTL_MAXNAME]; 140 size_t savelen = 0, oldlen = 0; 141 142 /* 143 * get linux args structure 144 */ 145 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 146 return error; 147 148 /* 149 * get oldlen 150 */ 151 oldlen = 0; 152 if (ls.oldlenp != NULL) { 153 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 154 if (error) 155 return (error); 156 } 157 savelen = oldlen; 158 159 /* 160 * top-level sysctl names may or may not be non-terminal, but 161 * we don't care 162 */ 163 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 164 return (EINVAL); 165 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 166 if (error) 167 return (error); 168 169 #ifdef KTRACE 170 if (KTRPOINT(l->l_proc, KTR_MIB)) 171 ktrmib(l, name, ls.nlen); 172 #endif 173 /* 174 * wire old so that copyout() is less likely to fail? 175 */ 176 error = sysctl_lock(l, ls.oldval, savelen); 177 if (error) 178 return (error); 179 180 /* 181 * dispatch request into linux sysctl tree 182 */ 183 error = sysctl_dispatch(&name[0], ls.nlen, 184 ls.oldval, &oldlen, 185 ls.newval, ls.newlen, 186 &name[0], l, &linux_sysctl_root); 187 188 /* 189 * release the sysctl lock 190 */ 191 sysctl_unlock(l); 192 193 /* 194 * reset caller's oldlen, even if we got an error 195 */ 196 if (ls.oldlenp) { 197 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 198 if (error == 0) 199 error = nerror; 200 } 201 202 /* 203 * if the only problem is that we weren't given enough space, 204 * that's an ENOMEM error 205 */ 206 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 207 error = ENOMEM; 208 209 return (error); 210 } 211 212 /* 213 * kernel related system variables under emul.linux in the main sysctl 214 * tree 215 */ 216 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 217 { 218 219 sysctl_createv(clog, 0, NULL, NULL, 220 CTLFLAG_PERMANENT, 221 CTLTYPE_NODE, "emul", NULL, 222 NULL, 0, NULL, 0, 223 CTL_EMUL, CTL_EOL); 224 sysctl_createv(clog, 0, NULL, NULL, 225 CTLFLAG_PERMANENT, 226 CTLTYPE_NODE, "linux", 227 SYSCTL_DESCR("Linux emulation settings"), 228 NULL, 0, NULL, 0, 229 CTL_EMUL, EMUL_LINUX, CTL_EOL); 230 sysctl_createv(clog, 0, NULL, NULL, 231 CTLFLAG_PERMANENT, 232 CTLTYPE_NODE, "kern", 233 SYSCTL_DESCR("Linux kernel emulation settings"), 234 NULL, 0, NULL, 0, 235 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 236 237 sysctl_createv(clog, 0, NULL, NULL, 238 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 239 CTLTYPE_STRING, "ostype", 240 SYSCTL_DESCR("Linux operating system type"), 241 NULL, 0, linux_sysname, sizeof(linux_sysname), 242 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 243 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 244 sysctl_createv(clog, 0, NULL, NULL, 245 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 246 CTLTYPE_STRING, "osrelease", 247 SYSCTL_DESCR("Linux operating system release"), 248 NULL, 0, linux_release, sizeof(linux_release), 249 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 250 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 251 sysctl_createv(clog, 0, NULL, NULL, 252 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 253 CTLTYPE_STRING, "osversion", 254 SYSCTL_DESCR("Linux operating system revision"), 255 NULL, 0, linux_version, sizeof(linux_version), 256 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 257 EMUL_LINUX_KERN_VERSION, CTL_EOL); 258 } 259
Indexes created Sat Sep 27 14:09:57 GMT 2025