sysv_ipc_50.c revision 1.2.6.2
1 1.2.6.2 yamt /* $NetBSD: sysv_ipc_50.c,v 1.2.6.2 2009/05/04 08:12:17 yamt Exp $ */ 2 1.2.6.2 yamt 3 1.2.6.2 yamt /*- 4 1.2.6.2 yamt * Copyright (c) 1998, 2007 The NetBSD Foundation, Inc. 5 1.2.6.2 yamt * All rights reserved. 6 1.2.6.2 yamt * 7 1.2.6.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.2.6.2 yamt * by Charles M. Hannum. 9 1.2.6.2 yamt * 10 1.2.6.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.2.6.2 yamt * modification, are permitted provided that the following conditions 12 1.2.6.2 yamt * are met: 13 1.2.6.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.2.6.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.2.6.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.6.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.2.6.2 yamt * documentation and/or other materials provided with the distribution. 18 1.2.6.2 yamt * 19 1.2.6.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.6.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.6.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.6.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.6.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.6.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.6.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.6.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.6.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.6.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.6.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.2.6.2 yamt */ 31 1.2.6.2 yamt 32 1.2.6.2 yamt #include <sys/cdefs.h> 33 1.2.6.2 yamt __KERNEL_RCSID(0, "$NetBSD: sysv_ipc_50.c,v 1.2.6.2 2009/05/04 08:12:17 yamt Exp $"); 34 1.2.6.2 yamt 35 1.2.6.2 yamt #ifdef _KERNEL_OPT 36 1.2.6.2 yamt #include "opt_sysv.h" 37 1.2.6.2 yamt #include "opt_compat_netbsd.h" 38 1.2.6.2 yamt #endif 39 1.2.6.2 yamt 40 1.2.6.2 yamt #include <sys/param.h> 41 1.2.6.2 yamt #include <sys/kernel.h> 42 1.2.6.2 yamt #include <sys/proc.h> 43 1.2.6.2 yamt #include <sys/ipc.h> 44 1.2.6.2 yamt #ifdef SYSVMSG 45 1.2.6.2 yamt #include <sys/msg.h> 46 1.2.6.2 yamt #endif 47 1.2.6.2 yamt #ifdef SYSVSEM 48 1.2.6.2 yamt #include <sys/sem.h> 49 1.2.6.2 yamt #endif 50 1.2.6.2 yamt #ifdef SYSVSHM 51 1.2.6.2 yamt #include <sys/shm.h> 52 1.2.6.2 yamt #endif 53 1.2.6.2 yamt #include <sys/systm.h> 54 1.2.6.2 yamt #include <sys/malloc.h> 55 1.2.6.2 yamt #include <sys/mount.h> 56 1.2.6.2 yamt #include <sys/vnode.h> 57 1.2.6.2 yamt #include <sys/stat.h> 58 1.2.6.2 yamt #include <sys/sysctl.h> 59 1.2.6.2 yamt #include <sys/kauth.h> 60 1.2.6.2 yamt 61 1.2.6.2 yamt #ifdef COMPAT_50 62 1.2.6.2 yamt #include <compat/sys/ipc.h> 63 1.2.6.2 yamt #ifdef SYSVMSG 64 1.2.6.2 yamt #include <compat/sys/msg.h> 65 1.2.6.2 yamt #endif 66 1.2.6.2 yamt #ifdef SYSVSEM 67 1.2.6.2 yamt #include <compat/sys/sem.h> 68 1.2.6.2 yamt #endif 69 1.2.6.2 yamt #ifdef SYSVSHM 70 1.2.6.2 yamt #include <compat/sys/shm.h> 71 1.2.6.2 yamt #endif 72 1.2.6.2 yamt 73 1.2.6.2 yamt /* 74 1.2.6.2 yamt * Check for ipc permission 75 1.2.6.2 yamt */ 76 1.2.6.2 yamt 77 1.2.6.2 yamt int 78 1.2.6.2 yamt sysctl_kern_sysvipc50(SYSCTLFN_ARGS) 79 1.2.6.2 yamt { 80 1.2.6.2 yamt void *where = oldp; 81 1.2.6.2 yamt size_t *sizep = oldlenp; 82 1.2.6.2 yamt #ifdef SYSVMSG 83 1.2.6.2 yamt struct msg_sysctl_info50 *msgsi = NULL; 84 1.2.6.2 yamt #endif 85 1.2.6.2 yamt #ifdef SYSVSEM 86 1.2.6.2 yamt struct sem_sysctl_info50 *semsi = NULL; 87 1.2.6.2 yamt #endif 88 1.2.6.2 yamt #ifdef SYSVSHM 89 1.2.6.2 yamt struct shm_sysctl_info50 *shmsi = NULL; 90 1.2.6.2 yamt #endif 91 1.2.6.2 yamt size_t infosize, dssize, tsize, buflen; 92 1.2.6.2 yamt void *bf = NULL; 93 1.2.6.2 yamt char *start; 94 1.2.6.2 yamt int32_t nds; 95 1.2.6.2 yamt int i, error, ret; 96 1.2.6.2 yamt 97 1.2.6.2 yamt if (namelen != 1) 98 1.2.6.2 yamt return EINVAL; 99 1.2.6.2 yamt 100 1.2.6.2 yamt start = where; 101 1.2.6.2 yamt buflen = *sizep; 102 1.2.6.2 yamt 103 1.2.6.2 yamt switch (*name) { 104 1.2.6.2 yamt case KERN_SYSVIPC_OMSG_INFO: 105 1.2.6.2 yamt #ifdef SYSVMSG 106 1.2.6.2 yamt infosize = sizeof(msgsi->msginfo); 107 1.2.6.2 yamt nds = msginfo.msgmni; 108 1.2.6.2 yamt dssize = sizeof(msgsi->msgids[0]); 109 1.2.6.2 yamt break; 110 1.2.6.2 yamt #else 111 1.2.6.2 yamt return EINVAL; 112 1.2.6.2 yamt #endif 113 1.2.6.2 yamt case KERN_SYSVIPC_OSEM_INFO: 114 1.2.6.2 yamt #ifdef SYSVSEM 115 1.2.6.2 yamt infosize = sizeof(semsi->seminfo); 116 1.2.6.2 yamt nds = seminfo.semmni; 117 1.2.6.2 yamt dssize = sizeof(semsi->semids[0]); 118 1.2.6.2 yamt break; 119 1.2.6.2 yamt #else 120 1.2.6.2 yamt return EINVAL; 121 1.2.6.2 yamt #endif 122 1.2.6.2 yamt case KERN_SYSVIPC_OSHM_INFO: 123 1.2.6.2 yamt #ifdef SYSVSHM 124 1.2.6.2 yamt infosize = sizeof(shmsi->shminfo); 125 1.2.6.2 yamt nds = shminfo.shmmni; 126 1.2.6.2 yamt dssize = sizeof(shmsi->shmids[0]); 127 1.2.6.2 yamt break; 128 1.2.6.2 yamt #else 129 1.2.6.2 yamt return EINVAL; 130 1.2.6.2 yamt #endif 131 1.2.6.2 yamt default: 132 1.2.6.2 yamt return EPASSTHROUGH; 133 1.2.6.2 yamt } 134 1.2.6.2 yamt /* 135 1.2.6.2 yamt * Round infosize to 64 bit boundary if requesting more than just 136 1.2.6.2 yamt * the info structure or getting the total data size. 137 1.2.6.2 yamt */ 138 1.2.6.2 yamt if (where == NULL || *sizep > infosize) 139 1.2.6.2 yamt infosize = roundup(infosize, sizeof(quad_t)); 140 1.2.6.2 yamt tsize = infosize + nds * dssize; 141 1.2.6.2 yamt 142 1.2.6.2 yamt /* Return just the total size required. */ 143 1.2.6.2 yamt if (where == NULL) { 144 1.2.6.2 yamt *sizep = tsize; 145 1.2.6.2 yamt return 0; 146 1.2.6.2 yamt } 147 1.2.6.2 yamt 148 1.2.6.2 yamt /* Not enough room for even the info struct. */ 149 1.2.6.2 yamt if (buflen < infosize) { 150 1.2.6.2 yamt *sizep = 0; 151 1.2.6.2 yamt return ENOMEM; 152 1.2.6.2 yamt } 153 1.2.6.2 yamt bf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK | M_ZERO); 154 1.2.6.2 yamt 155 1.2.6.2 yamt switch (*name) { 156 1.2.6.2 yamt #ifdef SYSVMSG 157 1.2.6.2 yamt case KERN_SYSVIPC_OMSG_INFO: 158 1.2.6.2 yamt msgsi = (struct msg_sysctl_info50 *)bf; 159 1.2.6.2 yamt msgsi->msginfo = msginfo; 160 1.2.6.2 yamt break; 161 1.2.6.2 yamt #endif 162 1.2.6.2 yamt #ifdef SYSVSEM 163 1.2.6.2 yamt case KERN_SYSVIPC_OSEM_INFO: 164 1.2.6.2 yamt semsi = (struct sem_sysctl_info50 *)bf; 165 1.2.6.2 yamt semsi->seminfo = seminfo; 166 1.2.6.2 yamt break; 167 1.2.6.2 yamt #endif 168 1.2.6.2 yamt #ifdef SYSVSHM 169 1.2.6.2 yamt case KERN_SYSVIPC_OSHM_INFO: 170 1.2.6.2 yamt shmsi = (struct shm_sysctl_info50 *)bf; 171 1.2.6.2 yamt shmsi->shminfo = shminfo; 172 1.2.6.2 yamt break; 173 1.2.6.2 yamt #endif 174 1.2.6.2 yamt } 175 1.2.6.2 yamt buflen -= infosize; 176 1.2.6.2 yamt 177 1.2.6.2 yamt ret = 0; 178 1.2.6.2 yamt if (buflen > 0) { 179 1.2.6.2 yamt /* Fill in the IPC data structures. */ 180 1.2.6.2 yamt for (i = 0; i < nds; i++) { 181 1.2.6.2 yamt if (buflen < dssize) { 182 1.2.6.2 yamt ret = ENOMEM; 183 1.2.6.2 yamt break; 184 1.2.6.2 yamt } 185 1.2.6.2 yamt switch (*name) { 186 1.2.6.2 yamt #ifdef SYSVMSG 187 1.2.6.2 yamt case KERN_SYSVIPC_OMSG_INFO: 188 1.2.6.2 yamt mutex_enter(&msgmutex); 189 1.2.6.2 yamt SYSCTL_FILL_MSG(msqs[i].msq_u, msgsi->msgids[i]); 190 1.2.6.2 yamt mutex_exit(&msgmutex); 191 1.2.6.2 yamt break; 192 1.2.6.2 yamt #endif 193 1.2.6.2 yamt #ifdef SYSVSEM 194 1.2.6.2 yamt case KERN_SYSVIPC_OSEM_INFO: 195 1.2.6.2 yamt SYSCTL_FILL_SEM(sema[i], semsi->semids[i]); 196 1.2.6.2 yamt break; 197 1.2.6.2 yamt #endif 198 1.2.6.2 yamt #ifdef SYSVSHM 199 1.2.6.2 yamt case KERN_SYSVIPC_OSHM_INFO: 200 1.2.6.2 yamt SYSCTL_FILL_SHM(shmsegs[i], shmsi->shmids[i]); 201 1.2.6.2 yamt break; 202 1.2.6.2 yamt #endif 203 1.2.6.2 yamt } 204 1.2.6.2 yamt buflen -= dssize; 205 1.2.6.2 yamt } 206 1.2.6.2 yamt } 207 1.2.6.2 yamt *sizep -= buflen; 208 1.2.6.2 yamt error = copyout(bf, start, *sizep); 209 1.2.6.2 yamt /* If copyout succeeded, use return code set earlier. */ 210 1.2.6.2 yamt if (error == 0) 211 1.2.6.2 yamt error = ret; 212 1.2.6.2 yamt if (bf) 213 1.2.6.2 yamt free(bf, M_TEMP); 214 1.2.6.2 yamt return error; 215 1.2.6.2 yamt } 216 1.2.6.2 yamt #endif 217
Indexes created Thu Oct 02 14:10:14 GMT 2025