Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/ibcs2/ibcs2_ipc.c
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1 /* $NetBSD: ibcs2_ipc.c,v 1.27 2007/12/20 23:02:49 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Scott Bartram 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: ibcs2_ipc.c,v 1.27 2007/12/20 23:02:49 dsl Exp $"); 29 30 #if defined(_KERNEL_OPT) 31 #include "opt_sysv.h" 32 #endif 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/namei.h> 37 #include <sys/proc.h> 38 #include <sys/file.h> 39 #include <sys/stat.h> 40 #include <sys/filedesc.h> 41 #include <sys/ioctl.h> 42 #include <sys/ipc.h> 43 #include <sys/kernel.h> 44 #include <sys/mbuf.h> 45 #include <sys/mman.h> 46 #include <sys/mount.h> 47 #include <sys/reboot.h> 48 #include <sys/resource.h> 49 #include <sys/resourcevar.h> 50 #include <sys/signal.h> 51 #include <sys/signalvar.h> 52 #include <sys/socket.h> 53 #include <sys/time.h> 54 #include <sys/times.h> 55 #include <sys/vnode.h> 56 #include <sys/uio.h> 57 #include <sys/wait.h> 58 #include <sys/utsname.h> 59 #include <sys/unistd.h> 60 #include <sys/msg.h> 61 #include <sys/sem.h> 62 #include <sys/shm.h> 63 #include <sys/syscallargs.h> 64 65 #include <compat/ibcs2/ibcs2_types.h> 66 #include <compat/ibcs2/ibcs2_signal.h> 67 #include <compat/ibcs2/ibcs2_syscallargs.h> 68 #include <compat/ibcs2/ibcs2_util.h> 69 70 #include <compat/sys/sem.h> 71 #include <compat/sys/shm.h> 72 #include <compat/sys/msg.h> 73 74 /* Verify that the standard values are correct. */ 75 typedef char x[IPC_RMID == 0 && IPC_SET == 1 && IPC_STAT == 2 ? 1 : -1]; 76 77 struct ibcs2_ipc_perm { 78 ibcs2_uid_t uid; 79 ibcs2_gid_t gid; 80 ibcs2_uid_t cuid; 81 ibcs2_gid_t cgid; 82 ibcs2_mode_t mode; 83 u_short seq; 84 ibcs2_key_t key; 85 }; 86 87 struct ibcs2_msqid_ds { 88 struct ibcs2_ipc_perm msg_perm; 89 struct __msg *msg_first; /* kernel address don't copyout */ 90 struct __msg *msg_last; /* kernel address don't copyout */ 91 u_short msg_cbytes; 92 u_short msg_qnum; 93 u_short msg_qbytes; 94 u_short msg_lspid; 95 u_short msg_lrpid; 96 ibcs2_time_t msg_stime; 97 ibcs2_time_t msg_rtime; 98 ibcs2_time_t msg_ctime; 99 }; 100 101 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 102 static void 103 cvt_perm2iperm(const struct ipc_perm *bp, struct ibcs2_ipc_perm *ibp) 104 { 105 ibp->cuid = bp->cuid; 106 ibp->cgid = bp->cgid; 107 ibp->uid = bp->uid; 108 ibp->gid = bp->gid; 109 ibp->mode = bp->mode; 110 ibp->seq = bp->_seq; 111 ibp->key = bp->_key; 112 } 113 114 static void 115 cvt_iperm2perm(const struct ibcs2_ipc_perm *ibp, struct ipc_perm *bp) 116 { 117 bp->cuid = ibp->cuid; 118 bp->cgid = ibp->cgid; 119 bp->uid = ibp->uid; 120 bp->gid = ibp->gid; 121 bp->mode = ibp->mode; 122 bp->_seq = ibp->seq; 123 bp->_key = ibp->key; 124 } 125 #endif /* SYSVMSG || SYSVSEM || SYSVMSG */ 126 127 #ifdef SYSVMSG 128 129 /* 130 * iBCS2 msgsys call 131 */ 132 133 static void 134 cvt_msqid2imsqid(const struct msqid_ds *bp, struct ibcs2_msqid_ds *ibp) 135 { 136 cvt_perm2iperm(&bp->msg_perm, &ibp->msg_perm); 137 ibp->msg_first = NULL; 138 ibp->msg_last = NULL; 139 ibp->msg_cbytes = bp->_msg_cbytes; 140 ibp->msg_qnum = bp->msg_qnum; 141 ibp->msg_qbytes = bp->msg_qbytes; 142 ibp->msg_lspid = bp->msg_lspid; 143 ibp->msg_lrpid = bp->msg_lrpid; 144 ibp->msg_stime = bp->msg_stime; 145 ibp->msg_rtime = bp->msg_rtime; 146 ibp->msg_ctime = bp->msg_ctime; 147 } 148 149 static void 150 cvt_imsqid2msqid(struct ibcs2_msqid_ds *ibp, struct msqid_ds *bp) 151 { 152 cvt_iperm2perm(&ibp->msg_perm, &bp->msg_perm); 153 bp->_msg_first = NULL; 154 bp->_msg_last = NULL; 155 bp->_msg_cbytes = ibp->msg_cbytes; 156 bp->msg_qnum = ibp->msg_qnum; 157 bp->msg_qbytes = ibp->msg_qbytes; 158 bp->msg_lspid = ibp->msg_lspid; 159 bp->msg_lrpid = ibp->msg_lrpid; 160 bp->msg_stime = ibp->msg_stime; 161 bp->msg_rtime = ibp->msg_rtime; 162 bp->msg_ctime = ibp->msg_ctime; 163 } 164 165 static int 166 do_compat_10_sys_msgsys(struct lwp *l, const struct ibcs2_sys_msgsys_args *uap, 167 register_t *retval, int which) 168 { 169 struct compat_10_sys_msgsys_args bsd_ua; 170 171 SCARG(&bsd_ua, which) = which; 172 SCARG(&bsd_ua, a2) = SCARG(uap, a2); 173 SCARG(&bsd_ua, a3) = SCARG(uap, a3); 174 SCARG(&bsd_ua, a4) = SCARG(uap, a4); 175 SCARG(&bsd_ua, a5) = SCARG(uap, a5); 176 SCARG(&bsd_ua, a6) = SCARG(uap, a6); 177 178 return compat_10_sys_msgsys(l, &bsd_ua, retval); 179 } 180 181 int 182 ibcs2_sys_msgsys(struct lwp *l, const struct ibcs2_sys_msgsys_args *uap, register_t *retval) 183 { 184 #ifdef SYSVMSG 185 /* { 186 syscallarg(int) which; 187 syscallarg(int) a2; 188 syscallarg(int) a3; 189 syscallarg(int) a4; 190 syscallarg(int) a5; 191 syscallarg(int) a6; 192 } */ 193 int error; 194 struct msqid_ds msqbuf; 195 struct ibcs2_msqid_ds msqbuf_ibcs2, *ibp; 196 197 switch (SCARG(uap, which)) { 198 case 0: /* msgget */ 199 return do_compat_10_sys_msgsys(l, uap, retval, 1); 200 case 1: /* msgctl */ 201 ibp = (void *)SCARG(uap, a4); 202 switch (SCARG(uap, a3)) { 203 case IPC_STAT: 204 error = msgctl1(l, SCARG(uap, a2), IPC_STAT, &msqbuf); 205 if (error == 0) { 206 cvt_msqid2imsqid(&msqbuf, &msqbuf_ibcs2); 207 error = copyout(&msqbuf_ibcs2, ibp, 208 sizeof msqbuf_ibcs2); 209 } 210 return error; 211 case IPC_SET: 212 error = copyin(ibp, &msqbuf_ibcs2, sizeof msqbuf_ibcs2); 213 if (error == 0) { 214 cvt_imsqid2msqid(&msqbuf_ibcs2, &msqbuf); 215 error = msgctl1(l, SCARG(uap, a2), 216 IPC_SET, &msqbuf); 217 } 218 return error; 219 case IPC_RMID: 220 return msgctl1(l, SCARG(uap, a2), IPC_RMID, NULL); 221 } 222 return EINVAL; 223 case 2: /* msgrcv */ 224 return do_compat_10_sys_msgsys(l, uap, retval, 3); 225 case 3: /* msgsnd */ 226 return do_compat_10_sys_msgsys(l, uap, retval, 2); 227 default: 228 break; 229 } 230 #endif 231 return EINVAL; 232 } 233 234 #endif /* SYSVMSG */ 235 236 #ifdef SYSVSEM 237 238 /* 239 * iBCS2 semsys call 240 */ 241 242 struct ibcs2_semid_ds { 243 struct ibcs2_ipc_perm sem_perm; 244 struct ibcs2_sem *sem_base; 245 u_short sem_nsems; 246 u_short pad1; 247 ibcs2_time_t sem_otime; 248 ibcs2_time_t sem_ctime; 249 }; 250 251 struct ibcs2_sem { 252 u_short semval; 253 ibcs2_pid_t sempid; 254 u_short semncnt; 255 u_short semzcnt; 256 }; 257 258 #ifdef notdef 259 static void cvt_sem2isem(struct sem *, struct ibcs2_sem *); 260 static void cvt_isem2sem(struct ibcs2_sem *, struct sem *); 261 262 static void 263 cvt_sem2isem(struct __sem *bp, struct ibcs2_sem *ibp) 264 { 265 ibp->semval = bp->semval; 266 ibp->sempid = bp->sempid; 267 ibp->semncnt = bp->semncnt; 268 ibp->semzcnt = bp->semzcnt; 269 } 270 271 static void 272 cvt_isem2sem(struct ibcs2_sem *ibp, struct __sem *bp) 273 { 274 bp->semval = ibp->semval; 275 bp->sempid = ibp->sempid; 276 bp->semncnt = ibp->semncnt; 277 bp->semzcnt = ibp->semzcnt; 278 } 279 #endif 280 281 static void 282 cvt_semid2isemid(const struct semid_ds *bp, struct ibcs2_semid_ds *ibp) 283 { 284 cvt_perm2iperm(&bp->sem_perm, &ibp->sem_perm); 285 ibp->sem_base = (struct ibcs2_sem *)bp->_sem_base; 286 ibp->sem_nsems = bp->sem_nsems; 287 ibp->sem_otime = bp->sem_otime; 288 ibp->sem_ctime = bp->sem_ctime; 289 } 290 291 292 static void 293 cvt_isemid2semid(const struct ibcs2_semid_ds *ibp, struct semid_ds *bp) 294 { 295 cvt_iperm2perm(&ibp->sem_perm, &bp->sem_perm); 296 bp->_sem_base = (struct __sem *)ibp->sem_base; 297 bp->sem_nsems = ibp->sem_nsems; 298 bp->sem_otime = ibp->sem_otime; 299 bp->sem_ctime = ibp->sem_ctime; 300 } 301 302 int 303 ibcs2_sys_semsys(struct lwp *l, const struct ibcs2_sys_semsys_args *uap, register_t *retval) 304 { 305 #ifdef SYSVSEM 306 /* { 307 syscallarg(int) which; 308 syscallarg(int) a2; 309 syscallarg(int) a3; 310 syscallarg(int) a4; 311 syscallarg(int) a5; 312 } */ 313 struct semid_ds sembuf; 314 struct ibcs2_semid_ds isembuf; 315 void *pass_arg; 316 int a5 = SCARG(uap, a5); 317 int error; 318 319 switch (SCARG(uap, which)) { 320 case 0: /* semctl */ 321 #define semctl_semid SCARG(uap, a2) 322 #define semctl_semnum SCARG(uap, a3) 323 #define semctl_cmd SCARG(uap, a4) 324 #define semctl_arg ((union __semun *)&a5) 325 pass_arg = get_semctl_arg(semctl_cmd, &sembuf, semctl_arg); 326 if (semctl_cmd == IPC_SET) { 327 error = copyin(semctl_arg->buf, &isembuf, sizeof isembuf); 328 if (error != 0) 329 return error; 330 cvt_isemid2semid(&isembuf, &sembuf); 331 } 332 error = semctl1(l, semctl_semid, semctl_semnum, semctl_cmd, 333 pass_arg, retval); 334 if (error == 0 && semctl_cmd == IPC_STAT) { 335 cvt_semid2isemid(&sembuf, &isembuf); 336 error = copyout(&isembuf, semctl_arg->buf, sizeof(isembuf)); 337 } 338 return error; 339 #undef semctl_semid 340 #undef semctl_semnum 341 #undef semctl_cmd 342 #undef semctl_arg 343 344 case 1: /* semget */ 345 return compat_10_sys_semsys(l, (const void *)uap, retval); 346 347 case 2: /* semop */ 348 return compat_10_sys_semsys(l, (const void *)uap, retval); 349 } 350 #endif 351 return EINVAL; 352 } 353 354 #endif /* SYSVSEM */ 355 356 #ifdef SYSVSHM 357 358 /* 359 * iBCS2 shmsys call 360 */ 361 362 struct ibcs2_shmid_ds { 363 struct ibcs2_ipc_perm shm_perm; 364 int shm_segsz; 365 int pad1; 366 char pad2[4]; 367 u_short shm_lpid; 368 u_short shm_cpid; 369 u_short shm_nattch; 370 u_short shm_cnattch; 371 ibcs2_time_t shm_atime; 372 ibcs2_time_t shm_dtime; 373 ibcs2_time_t shm_ctime; 374 }; 375 376 static void 377 cvt_shmid2ishmid(const struct shmid_ds *bp, struct ibcs2_shmid_ds *ibp) 378 { 379 cvt_perm2iperm(&bp->shm_perm, &ibp->shm_perm); 380 ibp->shm_segsz = bp->shm_segsz; 381 ibp->shm_lpid = bp->shm_lpid; 382 ibp->shm_cpid = bp->shm_cpid; 383 ibp->shm_nattch = bp->shm_nattch; 384 ibp->shm_cnattch = 0; /* ignored anyway */ 385 ibp->shm_atime = bp->shm_atime; 386 ibp->shm_dtime = bp->shm_dtime; 387 ibp->shm_ctime = bp->shm_ctime; 388 } 389 390 static void 391 cvt_ishmid2shmid(const struct ibcs2_shmid_ds *ibp, struct shmid_ds *bp) 392 { 393 cvt_iperm2perm(&ibp->shm_perm, &bp->shm_perm); 394 bp->shm_segsz = ibp->shm_segsz; 395 bp->shm_lpid = ibp->shm_lpid; 396 bp->shm_cpid = ibp->shm_cpid; 397 bp->shm_nattch = ibp->shm_nattch; 398 bp->shm_atime = ibp->shm_atime; 399 bp->shm_dtime = ibp->shm_dtime; 400 bp->shm_ctime = ibp->shm_ctime; 401 bp->_shm_internal = (void *)0; /* ignored anyway */ 402 return; 403 } 404 405 int 406 ibcs2_sys_shmsys(struct lwp *l, const struct ibcs2_sys_shmsys_args *uap, register_t *retval) 407 { 408 #ifdef SYSVSHM 409 /* { 410 syscallarg(int) which; 411 syscallarg(int) a2; 412 syscallarg(int) a3; 413 syscallarg(int) a4; 414 } */ 415 struct shmid_ds shmbuf; 416 struct ibcs2_shmid_ds *isp, ishmbuf; 417 int cmd, error; 418 419 switch (SCARG(uap, which)) { 420 case 0: /* shmat */ 421 break; 422 423 case 1: /* shmctl */ 424 cmd = SCARG(uap, a3); 425 isp = (struct ibcs2_shmid_ds *)SCARG(uap, a4); 426 if (cmd == IPC_SET) { 427 error = copyin(isp, &ishmbuf, sizeof(ishmbuf)); 428 if (error) 429 return error; 430 cvt_ishmid2shmid(&ishmbuf, &shmbuf); 431 } 432 433 error = shmctl1(l, SCARG(uap, a2), cmd, 434 (cmd == IPC_SET || cmd == IPC_STAT) ? &shmbuf : NULL); 435 436 if (error == 0 && cmd == IPC_STAT) { 437 cvt_shmid2ishmid(&shmbuf, &ishmbuf); 438 error = copyout(&ishmbuf, isp, sizeof(ishmbuf)); 439 } 440 return error; 441 442 case 2: /* shmdt */ 443 break; 444 445 case 3: /* shmget */ 446 break; 447 448 default: 449 return EINVAL; 450 } 451 return compat_10_sys_shmsys(l, (const void *)uap, retval); 452 #else 453 return EINVAL; 454 #endif 455 } 456 457 #endif /* SYSVSHM */
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