linux_sysctl.c revision 1.30.6.2
1 /* $NetBSD: linux_sysctl.c,v 1.30.6.2 2007/10/26 15:44:00 joerg 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 1.30.6.2 2007/10/26 15:44:00 joerg 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, void *v, register_t *retval) 122 { 123 struct linux_sys___sysctl_args *uap = v; 124 struct linux___sysctl ls; 125 int error, nerror, name[CTL_MAXNAME]; 126 size_t savelen = 0, oldlen = 0; 127 128 /* 129 * get linux args structure 130 */ 131 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof(ls)))) 132 return error; 133 134 /* 135 * get oldlen 136 */ 137 oldlen = 0; 138 if (ls.oldlenp != NULL) { 139 error = copyin(ls.oldlenp, &oldlen, sizeof(oldlen)); 140 if (error) 141 return (error); 142 } 143 savelen = oldlen; 144 145 /* 146 * top-level sysctl names may or may not be non-terminal, but 147 * we don't care 148 */ 149 if (ls.nlen > CTL_MAXNAME || ls.nlen < 1) 150 return (EINVAL); 151 error = copyin(ls.name, &name, ls.nlen * sizeof(int)); 152 if (error) 153 return (error); 154 155 ktrmib(name, ls.nlen); 156 157 /* 158 * wire old so that copyout() is less likely to fail? 159 */ 160 error = sysctl_lock(l, ls.oldval, savelen); 161 if (error) 162 return (error); 163 164 /* 165 * dispatch request into linux sysctl tree 166 */ 167 error = sysctl_dispatch(&name[0], ls.nlen, 168 ls.oldval, &oldlen, 169 ls.newval, ls.newlen, 170 &name[0], l, &linux_sysctl_root); 171 172 /* 173 * release the sysctl lock 174 */ 175 sysctl_unlock(l); 176 177 /* 178 * reset caller's oldlen, even if we got an error 179 */ 180 if (ls.oldlenp) { 181 nerror = copyout(&oldlen, ls.oldlenp, sizeof(oldlen)); 182 if (error == 0) 183 error = nerror; 184 } 185 186 /* 187 * if the only problem is that we weren't given enough space, 188 * that's an ENOMEM error 189 */ 190 if (error == 0 && ls.oldval != NULL && savelen < oldlen) 191 error = ENOMEM; 192 193 return (error); 194 } 195 196 /* 197 * kernel related system variables under emul.linux in the main sysctl 198 * tree 199 */ 200 SYSCTL_SETUP(sysctl_emul_linux_setup, "sysctl emul.linux subtree setup") 201 { 202 203 sysctl_createv(clog, 0, NULL, NULL, 204 CTLFLAG_PERMANENT, 205 CTLTYPE_NODE, "emul", NULL, 206 NULL, 0, NULL, 0, 207 CTL_EMUL, CTL_EOL); 208 sysctl_createv(clog, 0, NULL, NULL, 209 CTLFLAG_PERMANENT, 210 CTLTYPE_NODE, "linux", 211 SYSCTL_DESCR("Linux emulation settings"), 212 NULL, 0, NULL, 0, 213 CTL_EMUL, EMUL_LINUX, CTL_EOL); 214 sysctl_createv(clog, 0, NULL, NULL, 215 CTLFLAG_PERMANENT, 216 CTLTYPE_NODE, "kern", 217 SYSCTL_DESCR("Linux kernel emulation settings"), 218 NULL, 0, NULL, 0, 219 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, CTL_EOL); 220 221 sysctl_createv(clog, 0, NULL, NULL, 222 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 223 CTLTYPE_STRING, "ostype", 224 SYSCTL_DESCR("Linux operating system type"), 225 NULL, 0, linux_sysname, sizeof(linux_sysname), 226 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 227 EMUL_LINUX_KERN_OSTYPE, CTL_EOL); 228 sysctl_createv(clog, 0, NULL, NULL, 229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 230 CTLTYPE_STRING, "osrelease", 231 SYSCTL_DESCR("Linux operating system release"), 232 NULL, 0, linux_release, sizeof(linux_release), 233 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 234 EMUL_LINUX_KERN_OSRELEASE, CTL_EOL); 235 sysctl_createv(clog, 0, NULL, NULL, 236 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 237 CTLTYPE_STRING, "osversion", 238 SYSCTL_DESCR("Linux operating system revision"), 239 NULL, 0, linux_version, sizeof(linux_version), 240 CTL_EMUL, EMUL_LINUX, EMUL_LINUX_KERN, 241 EMUL_LINUX_KERN_VERSION, CTL_EOL); 242 } 243
Indexes created Sat Sep 27 14:09:57 GMT 2025