linux_sysctl.c revision 1.31.2.2
1 /* $NetBSD: linux_sysctl.c,v 1.31.2.2 2008/01/09 01:51:18 matt 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 1.31.2.2 2008/01/09 01:51:18 matt 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 #include <compat/linux/common/linux_ipc.h> 58 #include <compat/linux/common/linux_sem.h> 59 60 #include <compat/linux/linux_syscallargs.h> 61 #include <compat/linux/common/linux_sysctl.h> 62 #include <compat/linux/common/linux_exec.h> 63 #include <compat/linux/common/linux_machdep.h> 64 65 char linux_sysname[128] = "Linux"; 66 #if defined(__amd64__) || defined(__i386__) || defined(__powerpc__) 67 char linux_release[128] = "2.4.18"; 68 char linux_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 69 #else 70 char linux_release[128] = "2.0.38"; 71 char linux_version[128] = "#0 Sun Nov 11 11:11:11 MET 2000"; 72 #endif 73 74 #ifndef _LKM 75 static 76 #endif 77 struct sysctlnode linux_sysctl_root = { 78 .sysctl_flags = SYSCTL_VERSION| 79 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 80 .sysctl_num = 0, 81 .sysctl_name = "(linux_root)", 82 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 83 }; 84 85 /* 86 * setup for small sysctl tree used by emulation 87 */ 88 SYSCTL_SETUP(linux_sysctl_setup, "linux emulated sysctl subtree setup") 89 { 90 const struct sysctlnode *node = &linux_sysctl_root; 91 92 sysctl_createv(clog, 0, &node, &node, 93 CTLFLAG_PERMANENT, 94 CTLTYPE_NODE, "kern", NULL, 95 NULL, 0, NULL, 0, 96 LINUX_CTL_KERN, CTL_EOL); 97 98 sysctl_createv(clog, 0, &node, NULL, 99 CTLFLAG_PERMANENT, 100 CTLTYPE_STRING, "ostype", NULL, 101 NULL, 0, linux_sysname, sizeof(linux_sysname), 102 LINUX_KERN_OSTYPE, CTL_EOL); 103 sysctl_createv(clog, 0, &node, NULL, 104 CTLFLAG_PERMANENT, 105 CTLTYPE_STRING, "osrelease", NULL, 106 NULL, 0, linux_release, sizeof(linux_release), 107 LINUX_KERN_OSRELEASE, CTL_EOL); 108 sysctl_createv(clog, 0, &node, NULL, 109 CTLFLAG_PERMANENT, 110 CTLTYPE_STRING, "version", NULL, 111 NULL, 0, linux_version, sizeof(linux_version), 112 LINUX_KERN_VERSION, CTL_EOL); 113 114 linux_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 115 } 116 117 /* 118 * linux sysctl system call 119 */ 120 int 121 linux_sys___sysctl(struct lwp *l, const struct linux_sys___sysctl_args *uap, register_t *retval) 122 { 123 struct linux___sysctl ls; 124 int error, nerror, name[CTL_MAXNAME]; 125 size_t savelen = 0, oldlen = 0; 126 127 /* 128 * get linux args structure 129 */ 130 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 131 return error; 132 133 /* 134 * get oldlen 135 */ 136 oldlen = 0; 137 if (ls.oldlenp != NULL) { 138 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 139 if (error) 140 return (error); 141 } 142 savelen = oldlen; 143 144 /* 145 * top-level sysctl names may or may not be non-terminal, but 146 * we don't care 147 */ 148 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 149 return (EINVAL); 150 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 151 if (error) 152 return (error); 153 154 ktrmib(name, ls.nlen); 155 156 /* 157 * dispatch request into linux sysctl tree 158 */ 159 sysctl_lock(ls.newval != NULL); 160 error = sysctl_dispatch(&name[0], ls.nlen, 161 ls.oldval, &oldlen, 162 ls.newval, ls.newlen, 163 &name[0], l, &linux_sysctl_root); 164 sysctl_unlock(); 165 166 /* 167 * reset caller's oldlen, even if we got an error 168 */ 169 if (ls.oldlenp) { 170 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 171 if (error == 0) 172 error = nerror; 173 } 174 175 /* 176 * if the only problem is that we weren't given enough space, 177 * that's an ENOMEM error 178 */ 179 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 180 error = ENOMEM; 181 182 return (error); 183 } 184 185 /* 186 * kernel related system variables under emul.linux in the main sysctl 187 * tree 188 */ 189 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 190 { 191 192 sysctl_createv(clog, 0, NULL, NULL, 193 CTLFLAG_PERMANENT, 194 CTLTYPE_NODE, "emul", NULL, 195 NULL, 0, NULL, 0, 196 CTL_EMUL, CTL_EOL); 197 sysctl_createv(clog, 0, NULL, NULL, 198 CTLFLAG_PERMANENT, 199 CTLTYPE_NODE, "linux", 200 SYSCTL_DESCR("Linux emulation settings"), 201 NULL, 0, NULL, 0, 202 CTL_EMUL, EMUL_LINUX, CTL_EOL); 203 sysctl_createv(clog, 0, NULL, NULL, 204 CTLFLAG_PERMANENT, 205 CTLTYPE_NODE, "kern", 206 SYSCTL_DESCR("Linux kernel emulation settings"), 207 NULL, 0, NULL, 0, 208 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 209 210 sysctl_createv(clog, 0, NULL, NULL, 211 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 212 CTLTYPE_STRING, "ostype", 213 SYSCTL_DESCR("Linux operating system type"), 214 NULL, 0, linux_sysname, sizeof(linux_sysname), 215 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 216 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 217 sysctl_createv(clog, 0, NULL, NULL, 218 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 219 CTLTYPE_STRING, "osrelease", 220 SYSCTL_DESCR("Linux operating system release"), 221 NULL, 0, linux_release, sizeof(linux_release), 222 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 223 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 224 sysctl_createv(clog, 0, NULL, NULL, 225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 226 CTLTYPE_STRING, "osversion", 227 SYSCTL_DESCR("Linux operating system revision"), 228 NULL, 0, linux_version, sizeof(linux_version), 229 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 230 EMUL_LINUX_KERN_VERSION, CTL_EOL); 231 } 232
Indexes created Sat Sep 27 14:09:57 GMT 2025