linux_sysctl.c revision 1.34.6.1
1 /* $NetBSD: linux_sysctl.c,v 1.34.6.1 2008/06/02 13:23:04 mjf 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * sysctl system call. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: linux_sysctl.c,v 1.34.6.1 2008/06/02 13:23:04 mjf Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/proc.h> 43 #include <sys/mount.h> 44 #include <sys/sysctl.h> 45 #include <sys/syscallargs.h> 46 #include <sys/ktrace.h> 47 48 #include <compat/linux/common/linux_types.h> 49 #include <compat/linux/common/linux_signal.h> 50 #include <compat/linux/common/linux_ipc.h> 51 #include <compat/linux/common/linux_sem.h> 52 53 #include <compat/linux/linux_syscallargs.h> 54 #include <compat/linux/common/linux_sysctl.h> 55 #include <compat/linux/common/linux_exec.h> 56 #include <compat/linux/common/linux_machdep.h> 57 58 char linux_sysname[128] = "Linux"; 59 #if defined(__amd64__) || defined(__i386__) || defined(__powerpc__) 60 char linux_release[128] = "2.4.18"; 61 char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 62 #else 63 char linux_release[128] = "2.0.38"; 64 char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000"; 65 #endif 66 67 #ifndef _LKM 68 static 69 #endif 70 struct sysctlnode linux_sysctl_root = { 71 .sysctl_flags = SYSCTL_VERSION| 72 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 73 .sysctl_num = 0, 74 .sysctl_name = "(linux_root)", 75 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 76 }; 77 78 /* 79 * setup for small sysctl tree used by emulation 80 */ 81 SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup") 82 { 83 const struct sysctlnode *node = &linux_sysctl_root; 84 85 sysctl_createv(clog, 0, &node, &node, 86 CTLFLAG_PERMANENT, 87 CTLTYPE_NODE, "kern", NULL, 88 NULL, 0, NULL, 0, 89 LINUX_CTL_KERN, CTL_EOL); 90 91 sysctl_createv(clog, 0, &node, NULL, 92 CTLFLAG_PERMANENT, 93 CTLTYPE_STRING, "ostype", NULL, 94 NULL, 0, linux_sysname, sizeof(linux_sysname), 95 LINUX_KERN_OSTYPE, CTL_EOL); 96 sysctl_createv(clog, 0, &node, NULL, 97 CTLFLAG_PERMANENT, 98 CTLTYPE_STRING, "osrelease", NULL, 99 NULL, 0, linux_release, sizeof(linux_release), 100 LINUX_KERN_OSRELEASE, CTL_EOL); 101 sysctl_createv(clog, 0, &node, NULL, 102 CTLFLAG_PERMANENT, 103 CTLTYPE_STRING, "version", NULL, 104 NULL, 0, linux_version, sizeof(linux_version), 105 LINUX_KERN_VERSION, CTL_EOL); 106 107 linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 108 } 109 110 /* 111 * linux sysctl system call 112 */ 113 int 114 linux_sys___sysctl(struct lwp *l, const struct linux_sys___sysctl_args *uap, register_t *retval) 115 { 116 struct linux___sysctl ls; 117 int error, nerror, name[CTL_MAXNAME]; 118 size_t savelen = 0, oldlen = 0; 119 120 /* 121 * get linux args structure 122 */ 123 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 124 return error; 125 126 /* 127 * get oldlen 128 */ 129 oldlen = 0; 130 if (ls.oldlenp != NULL) { 131 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 132 if (error) 133 return (error); 134 } 135 savelen = oldlen; 136 137 /* 138 * top-level sysctl names may or may not be non-terminal, but 139 * we don't care 140 */ 141 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 142 return (EINVAL); 143 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 144 if (error) 145 return (error); 146 147 ktrmib(name, ls.nlen); 148 149 /* 150 * dispatch request into linux sysctl tree 151 */ 152 sysctl_lock(ls.newval != NULL); 153 error = sysctl_dispatch(&name[0], ls.nlen, 154 ls.oldval, &oldlen, 155 ls.newval, ls.newlen, 156 &name[0], l, &linux_sysctl_root); 157 sysctl_unlock(); 158 159 /* 160 * reset caller's oldlen, even if we got an error 161 */ 162 if (ls.oldlenp) { 163 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 164 if (error == 0) 165 error = nerror; 166 } 167 168 /* 169 * if the only problem is that we weren't given enough space, 170 * that's an ENOMEM error 171 */ 172 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 173 error = ENOMEM; 174 175 return (error); 176 } 177 178 /* 179 * kernel related system variables under emul.linux in the main sysctl 180 * tree 181 */ 182 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 183 { 184 185 sysctl_createv(clog, 0, NULL, NULL, 186 CTLFLAG_PERMANENT, 187 CTLTYPE_NODE, "emul", NULL, 188 NULL, 0, NULL, 0, 189 CTL_EMUL, CTL_EOL); 190 sysctl_createv(clog, 0, NULL, NULL, 191 CTLFLAG_PERMANENT, 192 CTLTYPE_NODE, "linux", 193 SYSCTL_DESCR("Linux emulation settings"), 194 NULL, 0, NULL, 0, 195 CTL_EMUL, EMUL_LINUX, CTL_EOL); 196 sysctl_createv(clog, 0, NULL, NULL, 197 CTLFLAG_PERMANENT, 198 CTLTYPE_NODE, "kern", 199 SYSCTL_DESCR("Linux kernel emulation settings"), 200 NULL, 0, NULL, 0, 201 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 202 203 sysctl_createv(clog, 0, NULL, NULL, 204 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 205 CTLTYPE_STRING, "ostype", 206 SYSCTL_DESCR("Linux operating system type"), 207 NULL, 0, linux_sysname, sizeof(linux_sysname), 208 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 209 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 210 sysctl_createv(clog, 0, NULL, NULL, 211 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 212 CTLTYPE_STRING, "osrelease", 213 SYSCTL_DESCR("Linux operating system release"), 214 NULL, 0, linux_release, sizeof(linux_release), 215 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 216 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 217 sysctl_createv(clog, 0, NULL, NULL, 218 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 219 CTLTYPE_STRING, "osversion", 220 SYSCTL_DESCR("Linux operating system revision"), 221 NULL, 0, linux_version, sizeof(linux_version), 222 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 223 EMUL_LINUX_KERN_VERSION, CTL_EOL); 224 } 225
Indexes created Sat Sep 27 14:09:57 GMT 2025