freebsd_sysctl.c revision 1.2.10.2
1 /* $NetBSD: freebsd_sysctl.c,v 1.2.10.2 2006/12/30 20:47:32 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by 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 * FreeBSD compatibility module. Try to deal with various FreeBSD sysctl calls. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: freebsd_sysctl.c,v 1.2.10.2 2006/12/30 20:47:32 yamt Exp $"); 45 46 #if defined(_KERNEL_OPT) 47 #include "opt_ktrace.h" 48 #endif 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/proc.h> 53 #include <sys/mount.h> 54 #include <sys/signal.h> 55 #include <sys/signalvar.h> 56 #include <sys/malloc.h> 57 #include <sys/mman.h> 58 #include <sys/sysctl.h> 59 #ifdef KTRACE 60 #include <sys/ktrace.h> 61 #endif 62 63 #include <sys/sa.h> 64 #include <sys/syscallargs.h> 65 66 #include <compat/freebsd/freebsd_syscallargs.h> 67 #include <compat/common/compat_util.h> 68 #include <compat/freebsd/freebsd_rtprio.h> 69 #include <compat/freebsd/freebsd_timex.h> 70 #include <compat/freebsd/freebsd_signal.h> 71 #include <compat/freebsd/freebsd_mman.h> 72 73 static int freebsd_sysctl_name2oid(char *, int *, int *); 74 75 SYSCTL_SETUP_PROTO(freebsd_sysctl_setup); 76 SYSCTL_SETUP(freebsd_sysctl_setup, "freebsd emulated sysctl setup") 77 { 78 sysctl_createv(clog, 0, NULL, NULL, 79 CTLFLAG_PERMANENT, 80 CTLTYPE_NODE, "kern", NULL, 81 NULL, 0, NULL, 0, 82 CTL_KERN, CTL_EOL); 83 sysctl_createv(clog, 0, NULL, NULL, 84 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 85 CTLTYPE_INT, "osreldate", 86 SYSCTL_DESCR("Operating system revision"), 87 NULL, __NetBSD_Version__, NULL, 0, 88 CTL_KERN, CTL_CREATE, CTL_EOL); 89 } 90 91 int 92 freebsd_sys_sysctl(l, v, retval) 93 struct lwp *l; 94 void *v; 95 register_t *retval; 96 { 97 struct freebsd_sys_sysctl_args /* { 98 syscallarg(int *) name; 99 syscallarg(u_int) namelen; 100 syscallarg(void *) old; 101 syscallarg(size_t *) oldlenp; 102 syscallarg(void *) new; 103 syscallarg(size_t) newlen; 104 } */ *uap = v; 105 int error; 106 int name[CTL_MAXNAME]; 107 size_t newlen, *oldlenp; 108 u_int namelen; 109 void *new, *old; 110 111 namelen = SCARG(uap, namelen); 112 113 if ((namelen > CTL_MAXNAME) || (namelen < 1)) 114 return EINVAL; 115 116 if ((error = copyin(SCARG(uap, name), name, 117 namelen * sizeof(*name))) != 0) 118 return error; 119 120 if (namelen > 0 && name[0] != 0) 121 return(sys___sysctl(l, v, retval)); 122 123 #ifdef KTRACE 124 if (KTRPOINT(l->l_proc, KTR_MIB)) 125 ktrmib(l, name, namelen); 126 #endif 127 128 /* 129 * FreeBSD sysctl uses an undocumented set of special OIDs in it's 130 * sysctl MIB whose tree is rooted at oid 0. These OIDs are 131 * interpretted by their sysctl to implement functions that NetBSD 132 * performs in libc, such as sysctlgetmibinfo. 133 * 134 * From the FreeBSD kern_sysctl.c, these OIDs are: 135 * {0,0} printf the entire MIB-tree. 136 * {0,1,...} return the name of the "..." OID. 137 * {0,2,...} return the next OID. 138 * {0,3} return the OID of the name in "new" 139 * {0,4,...} return the kind & format info for the "..." OID. 140 * {0,5,...} return the description the "..." OID. 141 * 142 * Only implement {0,3} for now. 143 */ 144 145 if (namelen < 2 || namelen > CTL_MAXNAME) 146 return(EINVAL); 147 148 if (name[1] == 3) { 149 char *locnew; 150 int oid[CTL_MAXNAME]; 151 u_int oidlen = CTL_MAXNAME; 152 153 new = SCARG(uap, new); 154 newlen = SCARG(uap, newlen); 155 if (new == NULL || newlen < 1 || 156 newlen > (SYSCTL_NAMELEN * CTL_MAXNAME)) 157 return(EINVAL); 158 159 old = SCARG(uap, old); 160 oldlenp = SCARG(uap, oldlenp); 161 if (old == NULL || oldlenp == NULL || *oldlenp < sizeof(int)) 162 return(EINVAL); 163 164 if ((locnew = 165 (char *) malloc(newlen + 1, M_TEMP, M_WAITOK)) == NULL) 166 return(ENOMEM); 167 168 if ((error = copyinstr(new, locnew, newlen + 1, NULL)) || 169 (error = sysctl_lock(l, old, *oldlenp))) { 170 free(locnew, M_TEMP); 171 return(error); 172 } 173 #ifdef KTRACE 174 if (!error && KTRPOINT(l->l_proc, KTR_MIB)) { 175 struct iovec iov; 176 177 iov.iov_base = new; 178 iov.iov_len = newlen + 1; 179 ktrgenio(l, -1, UIO_WRITE, &iov, newlen + 1, 0); 180 } 181 #endif 182 183 error = freebsd_sysctl_name2oid(locnew, oid, &oidlen); 184 sysctl_unlock(l); 185 free(locnew, M_TEMP); 186 if (error) 187 return(error); 188 189 oidlen *= sizeof(int); 190 error = copyout(oid, SCARG(uap, old), 191 MIN(oidlen, *SCARG(uap, oldlenp))); 192 if (error) 193 return(error); 194 #ifdef KTRACE 195 if (KTRPOINT(l->l_proc, KTR_MIB)) { 196 struct iovec iov; 197 198 iov.iov_base = SCARG(uap, old); 199 iov.iov_len = MIN(oidlen, *SCARG(uap, oldlenp)); 200 ktrgenio(l, -1, UIO_READ, &iov, iov.iov_len, 0); 201 } 202 #endif 203 error = copyout(&oidlen, SCARG(uap, oldlenp), sizeof(u_int)); 204 205 return(error); 206 } 207 208 return(EOPNOTSUPP); 209 } 210 211 static int 212 freebsd_sysctl_name2oid(char *name, int *oid, int *oidlen) 213 { 214 char *dot; 215 int oi, ci; 216 struct sysctlnode *node, *pnode; 217 218 pnode = &sysctl_root; 219 node = sysctl_root.sysctl_child; 220 oi = 0; 221 if ((dot = strchr(name, (int)'.')) != NULL) 222 *dot++ = '\0'; 223 224 next: 225 while (*name != '\0' && node != NULL) { 226 for (ci = 0; ci < pnode->sysctl_clen; ci++) { 227 if (strcmp(name, node[ci].sysctl_name) == 0) { 228 oid[oi++] = node[ci].sysctl_num; 229 if ((name = dot) == NULL) { 230 *oidlen = oi; 231 return(0); 232 } 233 if ((dot = strchr(name, (int)'.')) != NULL) 234 *dot++ = '\0'; 235 236 if (SYSCTL_TYPE(node[ci].sysctl_flags) != 237 CTLTYPE_NODE) 238 return(ENOTDIR); 239 240 pnode = &node[ci]; 241 node = pnode->sysctl_child; 242 goto next; 243 } 244 } 245 246 /* no more nodes, it must not exist */ 247 break; 248 } 249 250 return(ENOENT); 251 } 252
Indexes created Wed Oct 22 13:09:56 GMT 2025