linux32_sysctl.c revision 1.4
1 /* $NetBSD: linux32_sysctl.c,v 1.4 2007/02/09 21:55:21 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Emmanuel Dreyfus 17 * 4. The name of the author may not be used to endorse or promote 18 * products derived from this software without specific prior written 19 * permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: linux32_sysctl.c,v 1.4 2007/02/09 21:55:21 ad Exp $"); 35 36 #include "opt_ktrace.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/proc.h> 42 #include <sys/mount.h> 43 #include <sys/sysctl.h> 44 #include <sys/syscallargs.h> 45 #ifdef KTRACE 46 #include <sys/ktrace.h> 47 #endif 48 49 #include <compat/netbsd32/netbsd32.h> 50 51 #include <compat/linux/common/linux_types.h> 52 #include <compat/linux/common/linux_signal.h> 53 #include <compat/linux/common/linux_sysctl.h> 54 55 #include <compat/linux/linux_syscallargs.h> 56 57 #include <compat/linux32/common/linux32_types.h> 58 #include <compat/linux32/common/linux32_signal.h> 59 #include <compat/linux32/common/linux32_sysctl.h> 60 61 #include <compat/linux32/linux32_syscallargs.h> 62 63 char linux32_sysname[128] = "Linux"; 64 char linux32_release[128] = "2.4.18"; 65 char linux32_version[128] = "#0 Wed Feb 20 20:00:02 CET 2002"; 66 67 68 SYSCTL_SETUP(sysctl_emul_linux32_setup, "sysctl emul.linux32 subtree setup") 69 { 70 71 sysctl_createv(clog, 0, NULL, NULL, 72 CTLFLAG_PERMANENT, 73 CTLTYPE_NODE, "emul", NULL, 74 NULL, 0, NULL, 0, 75 CTL_EMUL, CTL_EOL); 76 sysctl_createv(clog, 0, NULL, NULL, 77 CTLFLAG_PERMANENT, 78 CTLTYPE_NODE, "linux32", 79 SYSCTL_DESCR("Linux 32 bit emulation settings"), 80 NULL, 0, NULL, 0, 81 CTL_EMUL, EMUL_LINUX32, CTL_EOL); 82 sysctl_createv(clog, 0, NULL, NULL, 83 CTLFLAG_PERMANENT, 84 CTLTYPE_NODE, "kern", 85 SYSCTL_DESCR("Linux 32 bit kernel emulation settings"), 86 NULL, 0, NULL, 0, 87 CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, CTL_EOL); 88 89 sysctl_createv(clog, 0, NULL, NULL, 90 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 91 CTLTYPE_STRING, "ostype", 92 SYSCTL_DESCR("Linux 32 bit operating system type"), 93 NULL, 0, linux32_sysname, sizeof(linux32_sysname), 94 CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, 95 EMUL_LINUX32_KERN_OSTYPE, CTL_EOL); 96 sysctl_createv(clog, 0, NULL, NULL, 97 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 98 CTLTYPE_STRING, "osrelease", 99 SYSCTL_DESCR("Linux 32 bit operating system release"), 100 NULL, 0, linux32_release, sizeof(linux32_release), 101 CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, 102 EMUL_LINUX32_KERN_OSRELEASE, CTL_EOL); 103 sysctl_createv(clog, 0, NULL, NULL, 104 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 105 CTLTYPE_STRING, "osversion", 106 SYSCTL_DESCR("Linux 32 bit operating system revision"), 107 NULL, 0, linux32_version, sizeof(linux32_version), 108 CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, 109 EMUL_LINUX32_KERN_VERSION, CTL_EOL); 110 } 111 112 #ifndef _LKM 113 static 114 #endif 115 struct sysctlnode linux32_sysctl_root = { 116 .sysctl_flags = SYSCTL_VERSION| 117 CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, 118 .sysctl_num = 0, 119 .sysctl_name = "(linux32_root)", 120 sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)), 121 }; 122 123 SYSCTL_SETUP(linux32_sysctl_setup, "linux32 emulated sysctl subtree setup") 124 { 125 const struct sysctlnode *node = &linux32_sysctl_root; 126 127 sysctl_createv(clog, 0, &node, &node, 128 CTLFLAG_PERMANENT, 129 CTLTYPE_NODE, "kern", NULL, 130 NULL, 0, NULL, 0, 131 LINUX_CTL_KERN, CTL_EOL); 132 133 sysctl_createv(clog, 0, &node, NULL, 134 CTLFLAG_PERMANENT, 135 CTLTYPE_STRING, "ostype", NULL, 136 NULL, 0, linux32_sysname, sizeof(linux32_sysname), 137 LINUX_KERN_OSTYPE, CTL_EOL); 138 sysctl_createv(clog, 0, &node, NULL, 139 CTLFLAG_PERMANENT, 140 CTLTYPE_STRING, "osrelease", NULL, 141 NULL, 0, linux32_release, sizeof(linux32_release), 142 LINUX_KERN_OSRELEASE, CTL_EOL); 143 sysctl_createv(clog, 0, &node, NULL, 144 CTLFLAG_PERMANENT, 145 CTLTYPE_STRING, "version", NULL, 146 NULL, 0, linux32_version, sizeof(linux32_version), 147 LINUX_KERN_VERSION, CTL_EOL); 148 149 linux32_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; 150 } 151 152 int 153 linux32_sys___sysctl(l, v, retval) 154 struct lwp *l; 155 void *v; 156 register_t *retval; 157 { 158 struct linux32_sys___sysctl_args /* { 159 syscallarg(linux32___sysctlp_t) lsp; 160 } */ *uap = v; 161 struct linux32_sysctl ls32; 162 int name[CTL_MAXNAME]; 163 size_t savelen; 164 netbsd32_size_t oldlen32; 165 size_t oldlen; 166 int error; 167 168 /* 169 * Read sysctl arguments 170 */ 171 if ((error = copyin(NETBSD32PTR64(SCARG(uap, lsp)), 172 &ls32, sizeof(ls32))) != 0) 173 return error; 174 175 /* 176 * Read oldlen 177 */ 178 if (NETBSD32PTR64(ls32.oldlenp) != NULL) { 179 if ((error = copyin(NETBSD32PTR64(ls32.oldlenp), 180 &oldlen32, sizeof(oldlen32))) != 0) 181 return error; 182 } else { 183 oldlen32 = 0; 184 } 185 186 savelen = (size_t)oldlen32; 187 188 /* 189 * Sanity check nlen 190 */ 191 if ((ls32.nlen > CTL_MAXNAME) || (ls32.nlen < 1)) 192 return EINVAL; 193 194 /* 195 * Read the sysctl name 196 */ 197 if ((error = copyin(NETBSD32PTR64(ls32.name), &name, 198 ls32.nlen * sizeof(int))) != 0) 199 return error; 200 201 #ifdef KTRACE 202 if (KTRPOINT(l->l_proc, KTR_MIB)) 203 ktrmib(l, name, ls32.nlen); 204 #endif 205 206 if ((error = sysctl_lock(l, 207 NETBSD32PTR64(ls32.oldval), savelen)) != 0) 208 return error; 209 210 /* 211 * First try linux32 tree, then linux tree 212 */ 213 oldlen = (size_t)oldlen32; 214 error = sysctl_dispatch(name, ls32.nlen, 215 NETBSD32PTR64(ls32.oldval), &oldlen, 216 NETBSD32PTR64(ls32.newval), ls32.newlen, 217 name, l, &linux32_sysctl_root); 218 oldlen32 = (netbsd32_size_t)oldlen; 219 220 sysctl_unlock(l); 221 222 /* 223 * Check for oldlen overflow (not likely, but who knows...) 224 */ 225 if (oldlen != oldlen32) { 226 #ifdef DEBUG_LINUX 227 printf("%s: oldlen32 = %d, oldlen = %ld\n", 228 __func__, oldlen32, oldlen); 229 #endif 230 return EINVAL; 231 } 232 233 /* 234 * set caller's oldlen, even if we got an error 235 */ 236 if (NETBSD32PTR64(ls32.oldlenp)) { 237 int nerror; 238 239 nerror = copyout(&oldlen32, 240 NETBSD32PTR64(ls32.oldlenp), sizeof(oldlen32)); 241 242 if (error == 0) 243 error = nerror; 244 } 245 246 /* 247 * oldlen was too short 248 */ 249 if ((error == 0) && 250 (NETBSD32PTR64(ls32.oldval) != NULL) && 251 (savelen < oldlen32)) 252 error = ENOMEM; 253 254 return error; 255 } 256
Indexes created Thu Oct 16 14:10:15 GMT 2025