linux_sysctl.c revision 1.30.6.1
1 /* $NetBSD: linux_sysctl.c,v 1.30.6.1 2007/08/16 11:02:50 jmcneill 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 1.30.6.1 2007/08/16 11:02:50 jmcneill Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/errno.h> 49 #include <sys/proc.h> 50 #include <sys/mount.h> 51 #include <sys/sysctl.h> 52 #include <sys/syscallargs.h> 53 #include <sys/ktrace.h> 54 55 #include <compat/linux/common/linux_types.h> 56 #include <compat/linux/common/linux_signal.h> 57 58 #include <compat/linux/linux_syscallargs.h> 59 #include <compat/linux/common/linux_sysctl.h> 60 #include <compat/linux/common/linux_exec.h> 61 #include <compat/linux/common/linux_machdep.h> 62 63 char linux_sysname[128] = "Linux"; 64 #if defined(__amd64__) || defined(__i386__) || defined(__powerpc__) 65 char linux_release[128] = "2.4.18"; 66 char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 67 #else 68 char linux_release[128] = "2.0.38"; 69 char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000"; 70 #endif 71 72 #ifndef _LKM 73 static 74 #endif 75 struct sysctlnode linux_sysctl_root = { 76 .sysctl_flags = SYSCTL_VERSION| 77 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 78 .sysctl_num = 0, 79 .sysctl_name = "(linux_root)", 80 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 81 }; 82 83 /* 84 * setup for small sysctl tree used by emulation 85 */ 86 SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup") 87 { 88 const struct sysctlnode *node = &linux_sysctl_root; 89 90 sysctl_createv(clog, 0, &node, &node, 91 CTLFLAG_PERMANENT, 92 CTLTYPE_NODE, "kern", NULL, 93 NULL, 0, NULL, 0, 94 LINUX_CTL_KERN, CTL_EOL); 95 96 sysctl_createv(clog, 0, &node, NULL, 97 CTLFLAG_PERMANENT, 98 CTLTYPE_STRING, "ostype", NULL, 99 NULL, 0, linux_sysname, sizeof(linux_sysname), 100 LINUX_KERN_OSTYPE, CTL_EOL); 101 sysctl_createv(clog, 0, &node, NULL, 102 CTLFLAG_PERMANENT, 103 CTLTYPE_STRING, "osrelease", NULL, 104 NULL, 0, linux_release, sizeof(linux_release), 105 LINUX_KERN_OSRELEASE, CTL_EOL); 106 sysctl_createv(clog, 0, &node, NULL, 107 CTLFLAG_PERMANENT, 108 CTLTYPE_STRING, "version", NULL, 109 NULL, 0, linux_version, sizeof(linux_version), 110 LINUX_KERN_VERSION, CTL_EOL); 111 112 linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 113 } 114 115 /* 116 * linux sysctl system call 117 */ 118 int 119 linux_sys___sysctl(struct lwp *l, void *v, register_t *retval) 120 { 121 struct linux_sys___sysctl_args *uap = v; 122 struct linux___sysctl ls; 123 int error, nerror, name[CTL_MAXNAME]; 124 size_t savelen = 0, oldlen = 0; 125 126 /* 127 * get linux args structure 128 */ 129 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 130 return error; 131 132 /* 133 * get oldlen 134 */ 135 oldlen = 0; 136 if (ls.oldlenp != NULL) { 137 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 138 if (error) 139 return (error); 140 } 141 savelen = oldlen; 142 143 /* 144 * top-level sysctl names may or may not be non-terminal, but 145 * we don't care 146 */ 147 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 148 return (EINVAL); 149 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 150 if (error) 151 return (error); 152 153 ktrmib(name, ls.nlen); 154 155 /* 156 * wire old so that copyout() is less likely to fail? 157 */ 158 error = sysctl_lock(l, ls.oldval, savelen); 159 if (error) 160 return (error); 161 162 /* 163 * dispatch request into linux sysctl tree 164 */ 165 error = sysctl_dispatch(&name[0], ls.nlen, 166 ls.oldval, &oldlen, 167 ls.newval, ls.newlen, 168 &name[0], l, &linux_sysctl_root); 169 170 /* 171 * release the sysctl lock 172 */ 173 sysctl_unlock(l); 174 175 /* 176 * reset caller's oldlen, even if we got an error 177 */ 178 if (ls.oldlenp) { 179 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 180 if (error == 0) 181 error = nerror; 182 } 183 184 /* 185 * if the only problem is that we weren't given enough space, 186 * that's an ENOMEM error 187 */ 188 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 189 error = ENOMEM; 190 191 return (error); 192 } 193 194 /* 195 * kernel related system variables under emul.linux in the main sysctl 196 * tree 197 */ 198 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 199 { 200 201 sysctl_createv(clog, 0, NULL, NULL, 202 CTLFLAG_PERMANENT, 203 CTLTYPE_NODE, "emul", NULL, 204 NULL, 0, NULL, 0, 205 CTL_EMUL, CTL_EOL); 206 sysctl_createv(clog, 0, NULL, NULL, 207 CTLFLAG_PERMANENT, 208 CTLTYPE_NODE, "linux", 209 SYSCTL_DESCR("Linux emulation settings"), 210 NULL, 0, NULL, 0, 211 CTL_EMUL, EMUL_LINUX, CTL_EOL); 212 sysctl_createv(clog, 0, NULL, NULL, 213 CTLFLAG_PERMANENT, 214 CTLTYPE_NODE, "kern", 215 SYSCTL_DESCR("Linux kernel emulation settings"), 216 NULL, 0, NULL, 0, 217 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 218 219 sysctl_createv(clog, 0, NULL, NULL, 220 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 221 CTLTYPE_STRING, "ostype", 222 SYSCTL_DESCR("Linux operating system type"), 223 NULL, 0, linux_sysname, sizeof(linux_sysname), 224 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 225 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 226 sysctl_createv(clog, 0, NULL, NULL, 227 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 228 CTLTYPE_STRING, "osrelease", 229 SYSCTL_DESCR("Linux operating system release"), 230 NULL, 0, linux_release, sizeof(linux_release), 231 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 232 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 233 sysctl_createv(clog, 0, NULL, NULL, 234 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 235 CTLTYPE_STRING, "osversion", 236 SYSCTL_DESCR("Linux operating system revision"), 237 NULL, 0, linux_version, sizeof(linux_version), 238 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 239 EMUL_LINUX_KERN_VERSION, CTL_EOL); 240 } 241
Indexes created Sat Sep 27 14:09:57 GMT 2025