linux_sysctl.c revision 1.25.2.2
1 /* $NetBSD: linux_sysctl.c,v 1.25.2.2 2007/05/07 10:55:13 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 1.25.2.2 2007/05/07 10:55:13 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 #include <compat/linux/common/linux_machdep.h> 68 69 char linux_sysname[128] = "Linux"; 70 #if defined(__amd64__) || defined(__i386__) || defined(__powerpc__) 71 char linux_release[128] = "2.4.18"; 72 char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 73 #else 74 char linux_release[128] = "2.0.38"; 75 char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000"; 76 #endif 77 char linux_machine[128] = ""; 78 79 #ifndef _LKM 80 static 81 #endif 82 struct sysctlnode linux_sysctl_root = { 83 .sysctl_flags = SYSCTL_VERSION| 84 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 85 .sysctl_num = 0, 86 .sysctl_name = "(linux_root)", 87 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 88 }; 89 90 /* 91 * setup for small sysctl tree used by emulation 92 */ 93 SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup") 94 { 95 const struct sysctlnode *node = &linux_sysctl_root; 96 97 sysctl_createv(clog, 0, &node, &node, 98 CTLFLAG_PERMANENT, 99 CTLTYPE_NODE, "kern", NULL, 100 NULL, 0, NULL, 0, 101 LINUX_CTL_KERN, CTL_EOL); 102 103 sysctl_createv(clog, 0, &node, NULL, 104 CTLFLAG_PERMANENT, 105 CTLTYPE_STRING, "ostype", NULL, 106 NULL, 0, linux_sysname, sizeof(linux_sysname), 107 LINUX_KERN_OSTYPE, CTL_EOL); 108 sysctl_createv(clog, 0, &node, NULL, 109 CTLFLAG_PERMANENT, 110 CTLTYPE_STRING, "osrelease", NULL, 111 NULL, 0, linux_release, sizeof(linux_release), 112 LINUX_KERN_OSRELEASE, CTL_EOL); 113 sysctl_createv(clog, 0, &node, NULL, 114 CTLFLAG_PERMANENT, 115 CTLTYPE_STRING, "version", NULL, 116 NULL, 0, linux_version, sizeof(linux_version), 117 LINUX_KERN_VERSION, CTL_EOL); 118 119 #if 0 120 #ifndef LINUX_UNAME_ARCH 121 #define LINUX_UNAME_ARCH machine 122 #endif 123 strlcpy(linux_machine, LINUX_UNAME_ARCH, sizeof(linux_machine)); 124 sysctl_createv(clog, 0, &node, NULL, 125 CTLFLAG_PERMANENT, 126 CTLTYPE_STRING, "machine", NULL, 127 NULL, 0, linux_machine, sizeof(linux_machine), 128 LINUX_KERN_VERSION, CTL_EOL); 129 #endif 130 131 linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 132 } 133 134 /* 135 * linux sysctl system call 136 */ 137 int 138 linux_sys___sysctl(struct lwp *l, void *v, register_t *retval) 139 { 140 struct linux_sys___sysctl_args *uap = v; 141 struct linux___sysctl ls; 142 int error, nerror, name[CTL_MAXNAME]; 143 size_t savelen = 0, oldlen = 0; 144 145 /* 146 * get linux args structure 147 */ 148 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 149 return error; 150 151 /* 152 * get oldlen 153 */ 154 oldlen = 0; 155 if (ls.oldlenp != NULL) { 156 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 157 if (error) 158 return (error); 159 } 160 savelen = oldlen; 161 162 /* 163 * top-level sysctl names may or may not be non-terminal, but 164 * we don't care 165 */ 166 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 167 return (EINVAL); 168 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 169 if (error) 170 return (error); 171 172 #ifdef KTRACE 173 if (KTRPOINT(l->l_proc, KTR_MIB)) 174 ktrmib(l, name, ls.nlen); 175 #endif 176 /* 177 * wire old so that copyout() is less likely to fail? 178 */ 179 error = sysctl_lock(l, ls.oldval, savelen); 180 if (error) 181 return (error); 182 183 /* 184 * dispatch request into linux sysctl tree 185 */ 186 error = sysctl_dispatch(&name[0], ls.nlen, 187 ls.oldval, &oldlen, 188 ls.newval, ls.newlen, 189 &name[0], l, &linux_sysctl_root); 190 191 /* 192 * release the sysctl lock 193 */ 194 sysctl_unlock(l); 195 196 /* 197 * reset caller's oldlen, even if we got an error 198 */ 199 if (ls.oldlenp) { 200 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 201 if (error == 0) 202 error = nerror; 203 } 204 205 /* 206 * if the only problem is that we weren't given enough space, 207 * that's an ENOMEM error 208 */ 209 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 210 error = ENOMEM; 211 212 return (error); 213 } 214 215 /* 216 * kernel related system variables under emul.linux in the main sysctl 217 * tree 218 */ 219 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 220 { 221 222 sysctl_createv(clog, 0, NULL, NULL, 223 CTLFLAG_PERMANENT, 224 CTLTYPE_NODE, "emul", NULL, 225 NULL, 0, NULL, 0, 226 CTL_EMUL, CTL_EOL); 227 sysctl_createv(clog, 0, NULL, NULL, 228 CTLFLAG_PERMANENT, 229 CTLTYPE_NODE, "linux", 230 SYSCTL_DESCR("Linux emulation settings"), 231 NULL, 0, NULL, 0, 232 CTL_EMUL, EMUL_LINUX, CTL_EOL); 233 sysctl_createv(clog, 0, NULL, NULL, 234 CTLFLAG_PERMANENT, 235 CTLTYPE_NODE, "kern", 236 SYSCTL_DESCR("Linux kernel emulation settings"), 237 NULL, 0, NULL, 0, 238 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 239 240 sysctl_createv(clog, 0, NULL, NULL, 241 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 242 CTLTYPE_STRING, "ostype", 243 SYSCTL_DESCR("Linux operating system type"), 244 NULL, 0, linux_sysname, sizeof(linux_sysname), 245 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 246 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 247 sysctl_createv(clog, 0, NULL, NULL, 248 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 249 CTLTYPE_STRING, "osrelease", 250 SYSCTL_DESCR("Linux operating system release"), 251 NULL, 0, linux_release, sizeof(linux_release), 252 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 253 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 256 CTLTYPE_STRING, "osversion", 257 SYSCTL_DESCR("Linux operating system revision"), 258 NULL, 0, linux_version, sizeof(linux_version), 259 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 260 EMUL_LINUX_KERN_VERSION, CTL_EOL); 261 } 262
Indexes created Sat Sep 27 14:09:57 GMT 2025