| 1 | /* $NetBSD: linux32_sysctl.c,v 1.16 2014/05/16 12:22:32 martin 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 1.16 2014/05/16 12:22:32 martin Exp $" ); |
| 35 | |
| 36 | #include <sys/param.h> |
| 37 | #include <sys/systm.h> |
| 38 | #include <sys/errno.h> |
| 39 | #include <sys/proc.h> |
| 40 | #include <sys/mount.h> |
| 41 | #include <sys/sysctl.h> |
| 42 | #include <sys/syscallargs.h> |
| 43 | #include <sys/ktrace.h> |
| 44 | |
| 45 | #include <compat/netbsd32/netbsd32.h> |
| 46 | |
| 47 | #include <compat/linux/common/linux_types.h> |
| 48 | #include <compat/linux/common/linux_signal.h> |
| 49 | #include <compat/linux/common/linux_sysctl.h> |
| 50 | #include <compat/linux/common/linux_ipc.h> |
| 51 | #include <compat/linux/common/linux_sem.h> |
| 52 | #include <compat/linux/linux_syscallargs.h> |
| 53 | |
| 54 | #include <compat/linux32/common/linux32_types.h> |
| 55 | #include <compat/linux32/common/linux32_signal.h> |
| 56 | #include <compat/linux32/common/linux32_sysctl.h> |
| 57 | #include <compat/linux32/linux32_syscallargs.h> |
| 58 | |
| 59 | char linux32_sysname[128] = "Linux" ; |
| 60 | char linux32_release[128] = "3.11.6" ; |
| 61 | char linux32_version[128] = "#1 SMP PREEMPT Thu Oct 24 16:23:02 UTC 2013" ; |
| 62 | |
| 63 | struct sysctlnode linux32_sysctl_root = { |
| 64 | .sysctl_flags = SYSCTL_VERSION| |
| 65 | CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, |
| 66 | .sysctl_num = 0, |
| 67 | .sysctl_name = "(linux32_root)" , |
| 68 | .sysctl_size = sizeof(struct sysctlnode), |
| 69 | }; |
| 70 | |
| 71 | static struct sysctllog *linux32_clog1; |
| 72 | static struct sysctllog *linux32_clog2; |
| 73 | |
| 74 | void |
| 75 | linux32_sysctl_fini(void) |
| 76 | { |
| 77 | |
| 78 | sysctl_teardown(&linux32_clog2); |
| 79 | sysctl_teardown(&linux32_clog1); |
| 80 | sysctl_free(&linux32_sysctl_root); |
| 81 | } |
| 82 | |
| 83 | void |
| 84 | linux32_sysctl_init(void) |
| 85 | { |
| 86 | const struct sysctlnode *node = &linux32_sysctl_root; |
| 87 | |
| 88 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
| 89 | CTLFLAG_PERMANENT, |
| 90 | CTLTYPE_NODE, "linux32" , |
| 91 | SYSCTL_DESCR("Linux 32 bit emulation settings" ), |
| 92 | NULL, 0, NULL, 0, |
| 93 | CTL_EMUL, EMUL_LINUX32, CTL_EOL); |
| 94 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
| 95 | CTLFLAG_PERMANENT, |
| 96 | CTLTYPE_NODE, "kern" , |
| 97 | SYSCTL_DESCR("Linux 32 bit kernel emulation settings" ), |
| 98 | NULL, 0, NULL, 0, |
| 99 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, CTL_EOL); |
| 100 | |
| 101 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
| 102 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 103 | CTLTYPE_STRING, "ostype" , |
| 104 | SYSCTL_DESCR("Linux 32 bit operating system type" ), |
| 105 | NULL, 0, linux32_sysname, sizeof(linux32_sysname), |
| 106 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
| 107 | EMUL_LINUX32_KERN_OSTYPE, CTL_EOL); |
| 108 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
| 109 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 110 | CTLTYPE_STRING, "osrelease" , |
| 111 | SYSCTL_DESCR("Linux 32 bit operating system release" ), |
| 112 | NULL, 0, linux32_release, sizeof(linux32_release), |
| 113 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
| 114 | EMUL_LINUX32_KERN_OSRELEASE, CTL_EOL); |
| 115 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
| 116 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 117 | CTLTYPE_STRING, "osversion" , |
| 118 | SYSCTL_DESCR("Linux 32 bit operating system revision" ), |
| 119 | NULL, 0, linux32_version, sizeof(linux32_version), |
| 120 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
| 121 | EMUL_LINUX32_KERN_VERSION, CTL_EOL); |
| 122 | |
| 123 | sysctl_createv(&linux32_clog2, 0, &node, &node, |
| 124 | CTLFLAG_PERMANENT, |
| 125 | CTLTYPE_NODE, "kern" , NULL, |
| 126 | NULL, 0, NULL, 0, |
| 127 | LINUX_CTL_KERN, CTL_EOL); |
| 128 | |
| 129 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
| 130 | CTLFLAG_PERMANENT, |
| 131 | CTLTYPE_STRING, "ostype" , NULL, |
| 132 | NULL, 0, linux32_sysname, sizeof(linux32_sysname), |
| 133 | LINUX_KERN_OSTYPE, CTL_EOL); |
| 134 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
| 135 | CTLFLAG_PERMANENT, |
| 136 | CTLTYPE_STRING, "osrelease" , NULL, |
| 137 | NULL, 0, linux32_release, sizeof(linux32_release), |
| 138 | LINUX_KERN_OSRELEASE, CTL_EOL); |
| 139 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
| 140 | CTLFLAG_PERMANENT, |
| 141 | CTLTYPE_STRING, "version" , NULL, |
| 142 | NULL, 0, linux32_version, sizeof(linux32_version), |
| 143 | LINUX_KERN_VERSION, CTL_EOL); |
| 144 | |
| 145 | linux32_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | linux32_sys___sysctl(struct lwp *l, const struct linux32_sys___sysctl_args *uap, register_t *retval) |
| 150 | { |
| 151 | /* { |
| 152 | syscallarg(linux32___sysctlp_t) lsp; |
| 153 | } */ |
| 154 | struct linux32_sysctl ls32; |
| 155 | int name[CTL_MAXNAME]; |
| 156 | size_t savelen; |
| 157 | netbsd32_size_t oldlen32; |
| 158 | size_t oldlen; |
| 159 | int error; |
| 160 | |
| 161 | /* |
| 162 | * Read sysctl arguments |
| 163 | */ |
| 164 | if ((error = copyin(SCARG_P32(uap, lsp), &ls32, sizeof(ls32))) != 0) |
| 165 | return error; |
| 166 | |
| 167 | /* |
| 168 | * Read oldlen |
| 169 | */ |
| 170 | if (NETBSD32PTR64(ls32.oldlenp) != NULL) { |
| 171 | if ((error = copyin(NETBSD32PTR64(ls32.oldlenp), |
| 172 | &oldlen32, sizeof(oldlen32))) != 0) |
| 173 | return error; |
| 174 | } else { |
| 175 | oldlen32 = 0; |
| 176 | } |
| 177 | |
| 178 | savelen = (size_t)oldlen32; |
| 179 | |
| 180 | /* |
| 181 | * Sanity check nlen |
| 182 | */ |
| 183 | if ((ls32.nlen > CTL_MAXNAME) || (ls32.nlen < 1)) |
| 184 | return ENOTDIR; |
| 185 | |
| 186 | /* |
| 187 | * Read the sysctl name |
| 188 | */ |
| 189 | if ((error = copyin(NETBSD32PTR64(ls32.name), &name, |
| 190 | ls32.nlen * sizeof(int))) != 0) |
| 191 | return error; |
| 192 | |
| 193 | ktrmib(name, ls32.nlen); |
| 194 | /* |
| 195 | * First try linux32 tree, then linux tree |
| 196 | */ |
| 197 | oldlen = (size_t)oldlen32; |
| 198 | sysctl_lock(NETBSD32PTR64(ls32.newval) != NULL); |
| 199 | error = sysctl_dispatch(name, ls32.nlen, |
| 200 | NETBSD32PTR64(ls32.oldval), &oldlen, |
| 201 | NETBSD32PTR64(ls32.newval), ls32.newlen, |
| 202 | name, l, &linux32_sysctl_root); |
| 203 | oldlen32 = (netbsd32_size_t)oldlen; |
| 204 | sysctl_unlock(); |
| 205 | |
| 206 | /* |
| 207 | * Check for oldlen overflow (not likely, but who knows...) |
| 208 | */ |
| 209 | if (oldlen != oldlen32) { |
| 210 | #ifdef DEBUG_LINUX |
| 211 | printf("%s: oldlen32 = %d, oldlen = %ld\n" , |
| 212 | __func__, oldlen32, oldlen); |
| 213 | #endif |
| 214 | return EINVAL; |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * set caller's oldlen, even if we got an error |
| 219 | */ |
| 220 | if (NETBSD32PTR64(ls32.oldlenp)) { |
| 221 | int nerror; |
| 222 | |
| 223 | nerror = copyout(&oldlen32, |
| 224 | NETBSD32PTR64(ls32.oldlenp), sizeof(oldlen32)); |
| 225 | |
| 226 | if (error == 0) |
| 227 | error = nerror; |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * oldlen was too short |
| 232 | */ |
| 233 | if ((error == 0) && |
| 234 | (NETBSD32PTR64(ls32.oldval) != NULL) && |
| 235 | (savelen < oldlen32)) |
| 236 | error = ENOMEM; |
| 237 | |
| 238 | return error; |
| 239 | } |
| 240 | |