| 1 | /* $NetBSD: netbsd32_sysctl.c,v 1.36 2015/05/17 18:52:37 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. The name of the author may not be used to endorse or promote products |
| 19 | * derived from this software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 26 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 27 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 28 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 29 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: netbsd32_sysctl.c,v 1.36 2015/05/17 18:52:37 matt Exp $" ); |
| 36 | |
| 37 | #if defined(_KERNEL_OPT) |
| 38 | #include "opt_ddb.h" |
| 39 | #endif |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/kernel.h> |
| 44 | #include <sys/mount.h> |
| 45 | #include <sys/stat.h> |
| 46 | #include <sys/time.h> |
| 47 | #include <sys/vnode.h> |
| 48 | #include <sys/syscallargs.h> |
| 49 | #include <sys/proc.h> |
| 50 | #include <sys/sysctl.h> |
| 51 | #include <sys/dirent.h> |
| 52 | #include <sys/ktrace.h> |
| 53 | |
| 54 | #include <uvm/uvm_extern.h> |
| 55 | |
| 56 | #include <compat/netbsd32/netbsd32.h> |
| 57 | #include <compat/netbsd32/netbsd32_syscall.h> |
| 58 | #include <compat/netbsd32/netbsd32_syscallargs.h> |
| 59 | #include <compat/netbsd32/netbsd32_conv.h> |
| 60 | #include <compat/netbsd32/netbsd32_sysctl.h> |
| 61 | |
| 62 | #if defined(DDB) |
| 63 | #include <ddb/ddbvar.h> |
| 64 | #endif |
| 65 | |
| 66 | struct sysctlnode netbsd32_sysctl_root = { |
| 67 | .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE, |
| 68 | .sysctl_num = 0, |
| 69 | .sysctl_name = "(netbsd32_root)" , |
| 70 | .sysctl_size = sizeof(struct sysctlnode), |
| 71 | }; |
| 72 | |
| 73 | static struct sysctllog *netbsd32_clog; |
| 74 | |
| 75 | /* |
| 76 | * sysctl helper routine for netbsd32's kern.boottime node |
| 77 | */ |
| 78 | static int |
| 79 | netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS) |
| 80 | { |
| 81 | struct sysctlnode node; |
| 82 | struct netbsd32_timespec bt32; |
| 83 | |
| 84 | netbsd32_from_timespec(&boottime, &bt32); |
| 85 | |
| 86 | node = *rnode; |
| 87 | node.sysctl_data = &bt32; |
| 88 | return (sysctl_lookup(SYSCTLFN_CALL(&node))); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * sysctl helper routine for netbsd32's vm.loadavg node |
| 93 | */ |
| 94 | static int |
| 95 | netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS) |
| 96 | { |
| 97 | struct sysctlnode node; |
| 98 | struct netbsd32_loadavg av32; |
| 99 | |
| 100 | netbsd32_from_loadavg(&av32, &averunnable); |
| 101 | |
| 102 | node = *rnode; |
| 103 | node.sysctl_data = &av32; |
| 104 | return (sysctl_lookup(SYSCTLFN_CALL(&node))); |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | netbsd32_sysctl_init(void) |
| 109 | { |
| 110 | const struct sysctlnode *_root = &netbsd32_sysctl_root; |
| 111 | #ifndef __mips__ |
| 112 | extern const char machine_arch32[]; |
| 113 | #endif |
| 114 | extern const char machine32[]; |
| 115 | |
| 116 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 117 | CTLFLAG_PERMANENT, |
| 118 | CTLTYPE_NODE, "kern" , NULL, |
| 119 | NULL, 0, NULL, 0, |
| 120 | CTL_KERN, CTL_EOL); |
| 121 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 122 | CTLFLAG_PERMANENT, |
| 123 | CTLTYPE_STRUCT, "boottime" , NULL, |
| 124 | netbsd32_sysctl_kern_boottime, 0, NULL, |
| 125 | sizeof(struct netbsd32_timeval), |
| 126 | CTL_KERN, KERN_BOOTTIME, CTL_EOL); |
| 127 | |
| 128 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 129 | CTLFLAG_PERMANENT, |
| 130 | CTLTYPE_NODE, "vm" , NULL, |
| 131 | NULL, 0, NULL, 0, |
| 132 | CTL_VM, CTL_EOL); |
| 133 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 134 | CTLFLAG_PERMANENT, |
| 135 | CTLTYPE_STRUCT, "loadavg" , NULL, |
| 136 | netbsd32_sysctl_vm_loadavg, 0, NULL, |
| 137 | sizeof(struct netbsd32_loadavg), |
| 138 | CTL_VM, VM_LOADAVG, CTL_EOL); |
| 139 | |
| 140 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 141 | CTLFLAG_PERMANENT, |
| 142 | CTLTYPE_NODE, "hw" , NULL, |
| 143 | NULL, 0, NULL, 0, |
| 144 | CTL_HW, CTL_EOL); |
| 145 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 146 | CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, |
| 147 | CTLTYPE_INT, "alignbytes" , NULL, |
| 148 | NULL, ALIGNBYTES32, NULL, 0, |
| 149 | CTL_HW, HW_ALIGNBYTES, CTL_EOL); |
| 150 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 151 | CTLFLAG_PERMANENT, |
| 152 | CTLTYPE_STRING, "machine" , NULL, |
| 153 | NULL, 0, __UNCONST(&machine32), 0, |
| 154 | CTL_HW, HW_MACHINE, CTL_EOL); |
| 155 | #ifdef __mips__ |
| 156 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 157 | CTLFLAG_PERMANENT, |
| 158 | CTLTYPE_STRING, "machine_arch" , NULL, |
| 159 | cpu_machinearch32, 0, NULL, 0, |
| 160 | CTL_HW, HW_MACHINE_ARCH, CTL_EOL); |
| 161 | #else |
| 162 | sysctl_createv(&netbsd32_clog, 0, &_root, NULL, |
| 163 | CTLFLAG_PERMANENT, |
| 164 | CTLTYPE_STRING, "machine_arch" , NULL, |
| 165 | NULL, 0, __UNCONST(&machine_arch32), 0, |
| 166 | CTL_HW, HW_MACHINE_ARCH, CTL_EOL); |
| 167 | #endif |
| 168 | } |
| 169 | |
| 170 | void |
| 171 | netbsd32_sysctl_fini(void) |
| 172 | { |
| 173 | |
| 174 | sysctl_teardown(&netbsd32_clog); |
| 175 | sysctl_free(&netbsd32_sysctl_root); |
| 176 | } |
| 177 | |
| 178 | int |
| 179 | netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval) |
| 180 | { |
| 181 | /* { |
| 182 | syscallarg(netbsd32_intp) name; |
| 183 | syscallarg(u_int) namelen; |
| 184 | syscallarg(netbsd32_voidp) old; |
| 185 | syscallarg(netbsd32_size_tp) oldlenp; |
| 186 | syscallarg(netbsd32_voidp) new; |
| 187 | syscallarg(netbsd32_size_t) newlen; |
| 188 | } */ |
| 189 | const struct sysctlnode *pnode; |
| 190 | netbsd32_size_t netbsd32_oldlen; |
| 191 | size_t oldlen, *oldlenp, savelen; |
| 192 | int name[CTL_MAXNAME], error, nerror, *namep; |
| 193 | void *newp, *oldp; |
| 194 | |
| 195 | /* |
| 196 | * get and convert 32 bit size_t to native size_t |
| 197 | */ |
| 198 | namep = SCARG_P32(uap, name); |
| 199 | oldp = SCARG_P32(uap, oldv); |
| 200 | newp = SCARG_P32(uap, newv); |
| 201 | oldlenp = SCARG_P32(uap, oldlenp); |
| 202 | oldlen = 0; |
| 203 | if (oldlenp != NULL) { |
| 204 | error = copyin(oldlenp, &netbsd32_oldlen, |
| 205 | sizeof(netbsd32_oldlen)); |
| 206 | if (error) |
| 207 | return (error); |
| 208 | oldlen = netbsd32_oldlen; |
| 209 | } |
| 210 | savelen = oldlen; |
| 211 | |
| 212 | /* |
| 213 | * retrieve name and see if we need to dispatch this query to |
| 214 | * the shadow tree. if we find it in the shadow tree, |
| 215 | * dispatch to there, otherwise NULL means use the built-in |
| 216 | * default main tree. |
| 217 | */ |
| 218 | if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1) |
| 219 | return (EINVAL); |
| 220 | error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int)); |
| 221 | if (error) |
| 222 | return (error); |
| 223 | |
| 224 | ktrmib(name, SCARG(uap, namelen)); |
| 225 | |
| 226 | sysctl_lock(newp != NULL); |
| 227 | pnode = &netbsd32_sysctl_root; |
| 228 | error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL); |
| 229 | pnode = (error == 0) ? &netbsd32_sysctl_root : NULL; |
| 230 | error = sysctl_dispatch(&name[0], SCARG(uap, namelen), |
| 231 | oldp, &oldlen, |
| 232 | newp, SCARG(uap, newlen), |
| 233 | &name[0], l, pnode); |
| 234 | sysctl_unlock(); |
| 235 | |
| 236 | /* |
| 237 | * reset caller's oldlen, even if we got an error |
| 238 | */ |
| 239 | if (oldlenp) { |
| 240 | netbsd32_oldlen = oldlen; |
| 241 | nerror = copyout(&netbsd32_oldlen, oldlenp, |
| 242 | sizeof(netbsd32_oldlen)); |
| 243 | if (error == 0) |
| 244 | error = nerror; |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * if the only problem is that we weren't given enough space, |
| 249 | * that's an ENOMEM error |
| 250 | */ |
| 251 | if (error == 0 && oldp != NULL && savelen < oldlen) |
| 252 | error = ENOMEM; |
| 253 | |
| 254 | return (error); |
| 255 | } |
| 256 | |