1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 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. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id: linux_ipc.c,v 1.12 1997/10/28 10:50:02 kato Exp $ 29 */ 30 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/sysproto.h> 35 #include <sys/proc.h> 36 #include <sys/sem.h> 37 #include <sys/shm.h> 38 39 #include <i386/linux/linux.h> 40 #include <i386/linux/linux_proto.h> 41 #include <i386/linux/linux_util.h> 42 43 static int linux_semop __P((struct proc *, struct linux_ipc_args *)); 44 static int linux_semget __P((struct proc *, struct linux_ipc_args *)); 45 static int linux_semctl __P((struct proc *, struct linux_ipc_args *)); 46 static int linux_msgsnd __P((struct proc *, struct linux_ipc_args *)); 47 static int linux_msgrcv __P((struct proc *, struct linux_ipc_args *)); 48 static int linux_msgctl __P((struct proc *, struct linux_ipc_args *)); 49 static int linux_shmat __P((struct proc *, struct linux_ipc_args *)); 50 static int linux_shmdt __P((struct proc *, struct linux_ipc_args *)); 51 static int linux_shmget __P((struct proc *, struct linux_ipc_args *)); 52 static int linux_shmctl __P((struct proc *, struct linux_ipc_args *)); 53 54 struct linux_ipc_perm { 55 linux_key_t key; 56 unsigned short uid; 57 unsigned short gid; 58 unsigned short cuid; 59 unsigned short cgid; 60 unsigned short mode; 61 unsigned short seq; 62 }; 63 64 static void 65 linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp) 66 { 67 bpp->key = lpp->key; 68 bpp->uid = lpp->uid; 69 bpp->gid = lpp->gid; 70 bpp->cuid = lpp->cuid; 71 bpp->cgid = lpp->cgid; 72 bpp->mode = lpp->mode; 73 bpp->seq = lpp->seq; 74 } 75 76 77 static void 78 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp) 79 { 80 lpp->key = bpp->key; 81 lpp->uid = bpp->uid; 82 lpp->gid = bpp->gid; 83 lpp->cuid = bpp->cuid; 84 lpp->cgid = bpp->cgid; 85 lpp->mode = bpp->mode; 86 lpp->seq = bpp->seq; 87 } 88 89 struct linux_semid_ds { 90 struct linux_ipc_perm sem_perm; 91 linux_time_t sem_otime; 92 linux_time_t sem_ctime; 93 void *sem_base; 94 void *sem_pending; 95 void *sem_pending_last; 96 void *undo; 97 ushort sem_nsems; 98 }; 99 100 struct linux_shmid_ds { 101 struct linux_ipc_perm shm_perm; 102 int shm_segsz; 103 linux_time_t shm_atime; 104 linux_time_t shm_dtime; 105 linux_time_t shm_ctime; 106 ushort shm_cpid; 107 ushort shm_lpid; 108 short shm_nattch; 109 ushort private1; 110 void *private2; 111 void *private3; 112 }; 113 114 static void 115 linux_to_bsd_semid_ds(struct linux_semid_ds *lsp, struct semid_ds *bsp) 116 { 117 linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm); 118 bsp->sem_otime = lsp->sem_otime; 119 bsp->sem_ctime = lsp->sem_ctime; 120 bsp->sem_nsems = lsp->sem_nsems; 121 bsp->sem_base = lsp->sem_base; 122 } 123 124 static void 125 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct linux_semid_ds *lsp) 126 { 127 bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm); 128 lsp->sem_otime = bsp->sem_otime; 129 lsp->sem_ctime = bsp->sem_ctime; 130 lsp->sem_nsems = bsp->sem_nsems; 131 lsp->sem_base = bsp->sem_base; 132 } 133 134 static void 135 linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp) 136 { 137 linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm); 138 bsp->shm_segsz = lsp->shm_segsz; 139 bsp->shm_lpid = lsp->shm_lpid; 140 bsp->shm_cpid = lsp->shm_cpid; 141 bsp->shm_nattch = lsp->shm_nattch; 142 bsp->shm_atime = lsp->shm_atime; 143 bsp->shm_dtime = lsp->shm_dtime; 144 bsp->shm_ctime = lsp->shm_ctime; 145 bsp->shm_internal = lsp->private3; /* this goes (yet) SOS */ 146 } 147 148 static void 149 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp) 150 { 151 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm); 152 lsp->shm_segsz = bsp->shm_segsz; 153 lsp->shm_lpid = bsp->shm_lpid; 154 lsp->shm_cpid = bsp->shm_cpid; 155 lsp->shm_nattch = bsp->shm_nattch; 156 lsp->shm_atime = bsp->shm_atime; 157 lsp->shm_dtime = bsp->shm_dtime; 158 lsp->shm_ctime = bsp->shm_ctime; 159 lsp->private3 = bsp->shm_internal; /* this goes (yet) SOS */ 160 } 161 162 static int 163 linux_semop(struct proc *p, struct linux_ipc_args *args) 164 { 165 struct semop_args /* { 166 int semid; 167 struct sembuf *sops; 168 int nsops; 169 } */ bsd_args; 170 171 bsd_args.semid = args->arg1; 172 bsd_args.sops = (struct sembuf *)args->ptr; 173 bsd_args.nsops = args->arg2; 174 return semop(p, &bsd_args); 175 } 176 177 static int 178 linux_semget(struct proc *p, struct linux_ipc_args *args) 179 { 180 struct semget_args /* { 181 key_t key; 182 int nsems; 183 int semflg; 184 } */ bsd_args; 185 186 bsd_args.key = args->arg1; 187 bsd_args.nsems = args->arg2; 188 bsd_args.semflg = args->arg3; 189 return semget(p, &bsd_args); 190 } 191 192 static int 193 linux_semctl(struct proc *p, struct linux_ipc_args *args) 194 { 195 struct linux_semid_ds linux_semid; 196 struct semid_ds bsd_semid; 197 struct __semctl_args /* { 198 int semid; 199 int semnum; 200 int cmd; 201 union semun *arg; 202 } */ bsd_args; 203 int error; 204 caddr_t sg, unptr, dsp, ldsp; 205 206 sg = stackgap_init(); 207 bsd_args.semid = args->arg1; 208 bsd_args.semnum = args->arg2; 209 bsd_args.cmd = args->arg3; 210 bsd_args.arg = (union semun *)args->ptr; 211 212 switch (args->arg3) { 213 case LINUX_IPC_RMID: 214 bsd_args.cmd = IPC_RMID; 215 break; 216 case LINUX_GETNCNT: 217 bsd_args.cmd = GETNCNT; 218 break; 219 case LINUX_GETPID: 220 bsd_args.cmd = GETPID; 221 break; 222 case LINUX_GETVAL: 223 bsd_args.cmd = GETVAL; 224 break; 225 case LINUX_GETZCNT: 226 bsd_args.cmd = GETZCNT; 227 break; 228 case LINUX_SETVAL: 229 bsd_args.cmd = SETVAL; 230 break; 231 case LINUX_IPC_SET: 232 bsd_args.cmd = IPC_SET; 233 error = copyin(args->ptr, &ldsp, sizeof(ldsp)); 234 if (error) 235 return error; 236 error = copyin(ldsp, (caddr_t)&linux_semid, sizeof(linux_semid)); 237 if (error) 238 return error; 239 linux_to_bsd_semid_ds(&linux_semid, &bsd_semid); 240 unptr = stackgap_alloc(&sg, sizeof(union semun)); 241 dsp = stackgap_alloc(&sg, sizeof(struct semid_ds)); 242 error = copyout((caddr_t)&bsd_semid, dsp, sizeof(bsd_semid)); 243 if (error) 244 return error; 245 error = copyout((caddr_t)&dsp, unptr, sizeof(dsp)); 246 if (error) 247 return error; 248 bsd_args.arg = (union semun *)unptr; 249 return __semctl(p, &bsd_args); 250 case LINUX_IPC_STAT: 251 bsd_args.cmd = IPC_STAT; 252 unptr = stackgap_alloc(&sg, sizeof(union semun *)); 253 dsp = stackgap_alloc(&sg, sizeof(struct semid_ds)); 254 error = copyout((caddr_t)&dsp, unptr, sizeof(dsp)); 255 if (error) 256 return error; 257 bsd_args.arg = (union semun *)unptr; 258 error = __semctl(p, &bsd_args); 259 if (error) 260 return error; 261 error = copyin(dsp, (caddr_t)&bsd_semid, sizeof(bsd_semid)); 262 if (error) 263 return error; 264 bsd_to_linux_semid_ds(&bsd_semid, &linux_semid); 265 error = copyin(args->ptr, &ldsp, sizeof(ldsp)); 266 if (error) 267 return error; 268 return copyout((caddr_t)&linux_semid, ldsp, sizeof(linux_semid)); 269 case LINUX_GETALL: 270 /* FALLTHROUGH */ 271 case LINUX_SETALL: 272 /* FALLTHROUGH */ 273 default: 274 uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); 275 return EINVAL; 276 } 277 return __semctl(p, &bsd_args); 278 } 279 280 static int 281 linux_msgsnd(struct proc *p, struct linux_ipc_args *args) 282 { 283 struct msgsnd_args /* { 284 int msqid; 285 void *msgp; 286 size_t msgsz; 287 int msgflg; 288 } */ bsd_args; 289 290 bsd_args.msqid = args->arg1; 291 bsd_args.msgp = args->ptr; 292 bsd_args.msgsz = args->arg2; 293 bsd_args.msgflg = args->arg3; 294 return msgsnd(p, &bsd_args); 295 } 296 297 static int 298 linux_msgrcv(struct proc *p, struct linux_ipc_args *args) 299 { 300 struct msgrcv_args /* { 301 int msqid; 302 void *msgp; 303 size_t msgsz; 304 long msgtyp; 305 int msgflg; 306 } */ bsd_args; 307 308 bsd_args.msqid = args->arg1; 309 bsd_args.msgp = args->ptr; 310 bsd_args.msgsz = args->arg2; 311 bsd_args.msgtyp = 0; 312 bsd_args.msgflg = args->arg3; 313 return msgrcv(p, &bsd_args); 314 } 315 316 static int 317 linux_msgget(struct proc *p, struct linux_ipc_args *args) 318 { 319 struct msgget_args /* { 320 key_t key; 321 int msgflg; 322 } */ bsd_args; 323 324 bsd_args.key = args->arg1; 325 bsd_args.msgflg = args->arg2; 326 return msgget(p, &bsd_args); 327 } 328 329 static int 330 linux_msgctl(struct proc *p, struct linux_ipc_args *args) 331 { 332 struct msgctl_args /* { 333 int msqid; 334 int cmd; 335 struct msqid_ds *buf; 336 } */ bsd_args; 337 338 bsd_args.msqid = args->arg1; 339 bsd_args.cmd = args->arg2; 340 bsd_args.buf = (struct msqid_ds *)args->ptr; 341 return msgctl(p, &bsd_args); 342 } 343 344 static int 345 linux_shmat(struct proc *p, struct linux_ipc_args *args) 346 { 347 struct shmat_args /* { 348 int shmid; 349 void *shmaddr; 350 int shmflg; 351 } */ bsd_args; 352 int error; 353 354 bsd_args.shmid = args->arg1; 355 bsd_args.shmaddr = args->ptr; 356 bsd_args.shmflg = args->arg2; 357 if ((error = shmat(p, &bsd_args))) 358 return error; 359 if ((error = copyout(p->p_retval, (caddr_t)args->arg3, sizeof(int)))) 360 return error; 361 p->p_retval[0] = 0; 362 return 0; 363 } 364 365 static int 366 linux_shmdt(struct proc *p, struct linux_ipc_args *args) 367 { 368 struct shmdt_args /* { 369 void *shmaddr; 370 } */ bsd_args; 371 372 bsd_args.shmaddr = args->ptr; 373 return shmdt(p, &bsd_args); 374 } 375 376 static int 377 linux_shmget(struct proc *p, struct linux_ipc_args *args) 378 { 379 struct shmget_args /* { 380 key_t key; 381 int size; 382 int shmflg; 383 } */ bsd_args; 384 385 bsd_args.key = args->arg1; 386 bsd_args.size = args->arg2; 387 bsd_args.shmflg = args->arg3; 388 return shmget(p, &bsd_args); 389 } 390 391 static int 392 linux_shmctl(struct proc *p, struct linux_ipc_args *args) 393 { 394 struct shmid_ds bsd_shmid; 395 struct linux_shmid_ds linux_shmid; 396 struct shmctl_args /* { 397 int shmid; 398 int cmd; 399 struct shmid_ds *buf; 400 } */ bsd_args; 401 int error; 402 caddr_t sg = stackgap_init(); 403 404 switch (args->arg2) { 405 case LINUX_IPC_STAT: 406 bsd_args.shmid = args->arg1; 407 bsd_args.cmd = IPC_STAT; 408 bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds)); 409 if ((error = shmctl(p, &bsd_args))) 410 return error; 411 if ((error = copyin((caddr_t)bsd_args.buf, (caddr_t)&bsd_shmid, 412 sizeof(struct shmid_ds)))) 413 return error; 414 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid); 415 return copyout((caddr_t)&linux_shmid, args->ptr, sizeof(linux_shmid)); 416 417 case LINUX_IPC_SET: 418 if ((error = copyin(args->ptr, (caddr_t)&linux_shmid, 419 sizeof(linux_shmid)))) 420 return error; 421 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 422 bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds)); 423 if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf, 424 sizeof(struct shmid_ds)))) 425 return error; 426 bsd_args.shmid = args->arg1; 427 bsd_args.cmd = IPC_SET; 428 return shmctl(p, &bsd_args); 429 430 case LINUX_IPC_RMID: 431 bsd_args.shmid = args->arg1; 432 bsd_args.cmd = IPC_RMID; 433 if ((error = copyin(args->ptr, (caddr_t)&linux_shmid, 434 sizeof(linux_shmid)))) 435 return error; 436 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 437 bsd_args.buf = (struct shmid_ds*)stackgap_alloc(&sg, sizeof(struct shmid_ds)); 438 if ((error = copyout((caddr_t)&bsd_shmid, (caddr_t)bsd_args.buf, 439 sizeof(struct shmid_ds)))) 440 return error; 441 return shmctl(p, &bsd_args); 442 443 case LINUX_IPC_INFO: 444 case LINUX_SHM_STAT: 445 case LINUX_SHM_INFO: 446 case LINUX_SHM_LOCK: 447 case LINUX_SHM_UNLOCK: 448 default: 449 uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); 450 return EINVAL; 451 } 452 } 453 454 int 455 linux_ipc(struct proc *p, struct linux_ipc_args *args) 456 { 457 switch (args->what) { 458 case LINUX_SEMOP: 459 return linux_semop(p, args); 460 case LINUX_SEMGET: 461 return linux_semget(p, args); 462 case LINUX_SEMCTL: 463 return linux_semctl(p, args); 464 case LINUX_MSGSND: 465 return linux_msgsnd(p, args); 466 case LINUX_MSGRCV: 467 return linux_msgrcv(p, args); 468 case LINUX_MSGGET: 469 return linux_msgget(p, args); 470 case LINUX_MSGCTL: 471 return linux_msgctl(p, args); 472 case LINUX_SHMAT: 473 return linux_shmat(p, args); 474 case LINUX_SHMDT: 475 return linux_shmdt(p, args); 476 case LINUX_SHMGET: 477 return linux_shmget(p, args); 478 case LINUX_SHMCTL: 479 return linux_shmctl(p, args); 480 default: 481 uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); 482 return ENOSYS; 483 } 484 } 485