| 1 | /* $NetBSD: prop_kern.c,v 1.17 2011/09/30 22:08:18 jym Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2006, 2009 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe. |
| 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/types.h> |
| 33 | |
| 34 | #include <libprop/proplib.h> |
| 35 | |
| 36 | #if !defined(_KERNEL) && !defined(_STANDALONE) |
| 37 | #include <sys/mman.h> |
| 38 | #include <errno.h> |
| 39 | #include <string.h> |
| 40 | #include <stdlib.h> |
| 41 | #include <stdio.h> |
| 42 | #include <sys/ioctl.h> |
| 43 | |
| 44 | static int |
| 45 | _prop_object_externalize_to_pref(prop_object_t obj, struct plistref *pref, |
| 46 | char **bufp) |
| 47 | { |
| 48 | char *buf; |
| 49 | |
| 50 | switch (prop_object_type(obj)) { |
| 51 | case PROP_TYPE_DICTIONARY: |
| 52 | buf = prop_dictionary_externalize(obj); |
| 53 | break; |
| 54 | case PROP_TYPE_ARRAY: |
| 55 | buf = prop_array_externalize(obj); |
| 56 | break; |
| 57 | default: |
| 58 | return (ENOTSUP); |
| 59 | } |
| 60 | if (buf == NULL) { |
| 61 | /* Assume we ran out of memory. */ |
| 62 | return (ENOMEM); |
| 63 | } |
| 64 | pref->pref_plist = buf; |
| 65 | pref->pref_len = strlen(buf) + 1; |
| 66 | |
| 67 | *bufp = buf; |
| 68 | |
| 69 | return (0); |
| 70 | } |
| 71 | |
| 72 | bool |
| 73 | prop_array_externalize_to_pref(prop_array_t array, struct plistref *prefp) |
| 74 | { |
| 75 | char *buf; |
| 76 | int rv; |
| 77 | |
| 78 | rv = _prop_object_externalize_to_pref(array, prefp, &buf); |
| 79 | if (rv != 0) |
| 80 | errno = rv; /* pass up error value in errno */ |
| 81 | return (rv == 0); |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * prop_array_externalize_to_pref -- |
| 86 | * Externalize an array into a plistref for sending to the kernel. |
| 87 | */ |
| 88 | int |
| 89 | prop_array_send_syscall(prop_array_t array, struct plistref *prefp) |
| 90 | { |
| 91 | if (prop_array_externalize_to_pref(array, prefp)) |
| 92 | return 0; |
| 93 | else |
| 94 | return errno; |
| 95 | } |
| 96 | |
| 97 | bool |
| 98 | prop_dictionary_externalize_to_pref(prop_dictionary_t dict, |
| 99 | struct plistref *prefp) |
| 100 | { |
| 101 | char *buf; |
| 102 | int rv; |
| 103 | |
| 104 | rv = _prop_object_externalize_to_pref(dict, prefp, &buf); |
| 105 | if (rv != 0) |
| 106 | errno = rv; /* pass up error value in errno */ |
| 107 | return (rv == 0); |
| 108 | } |
| 109 | |
| 110 | /* |
| 111 | * prop_dictionary_externalize_to_pref -- |
| 112 | * Externalize an dictionary into a plistref for sending to the kernel. |
| 113 | */ |
| 114 | int |
| 115 | prop_dictionary_send_syscall(prop_dictionary_t dict, |
| 116 | struct plistref *prefp) |
| 117 | { |
| 118 | if (prop_dictionary_externalize_to_pref(dict, prefp)) |
| 119 | return 0; |
| 120 | else |
| 121 | return errno; |
| 122 | } |
| 123 | |
| 124 | static int |
| 125 | _prop_object_send_ioctl(prop_object_t obj, int fd, unsigned long cmd) |
| 126 | { |
| 127 | struct plistref pref; |
| 128 | char *buf; |
| 129 | int error; |
| 130 | |
| 131 | error = _prop_object_externalize_to_pref(obj, &pref, &buf); |
| 132 | if (error) |
| 133 | return (error); |
| 134 | |
| 135 | if (ioctl(fd, cmd, &pref) == -1) |
| 136 | error = errno; |
| 137 | else |
| 138 | error = 0; |
| 139 | |
| 140 | free(buf); |
| 141 | |
| 142 | return (error); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * prop_array_send_ioctl -- |
| 147 | * Send an array to the kernel using the specified ioctl. |
| 148 | */ |
| 149 | int |
| 150 | prop_array_send_ioctl(prop_array_t array, int fd, unsigned long cmd) |
| 151 | { |
| 152 | int rv; |
| 153 | |
| 154 | rv = _prop_object_send_ioctl(array, fd, cmd); |
| 155 | if (rv != 0) { |
| 156 | errno = rv; /* pass up error value in errno */ |
| 157 | return rv; |
| 158 | } else |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * prop_dictionary_send_ioctl -- |
| 164 | * Send a dictionary to the kernel using the specified ioctl. |
| 165 | */ |
| 166 | int |
| 167 | prop_dictionary_send_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd) |
| 168 | { |
| 169 | int rv; |
| 170 | |
| 171 | rv = _prop_object_send_ioctl(dict, fd, cmd); |
| 172 | if (rv != 0) { |
| 173 | errno = rv; /* pass up error value in errno */ |
| 174 | return rv; |
| 175 | } else |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int |
| 180 | _prop_object_internalize_from_pref(const struct plistref *pref, |
| 181 | prop_type_t type, prop_object_t *objp) |
| 182 | { |
| 183 | prop_object_t obj = NULL; |
| 184 | char *buf; |
| 185 | int error = 0; |
| 186 | |
| 187 | if (pref->pref_len == 0) { |
| 188 | /* |
| 189 | * This should never happen; we should always get the XML |
| 190 | * for an empty dictionary if it's really empty. |
| 191 | */ |
| 192 | error = EIO; |
| 193 | goto out; |
| 194 | } else { |
| 195 | buf = pref->pref_plist; |
| 196 | buf[pref->pref_len - 1] = '\0'; /* extra insurance */ |
| 197 | switch (type) { |
| 198 | case PROP_TYPE_DICTIONARY: |
| 199 | obj = prop_dictionary_internalize(buf); |
| 200 | break; |
| 201 | case PROP_TYPE_ARRAY: |
| 202 | obj = prop_array_internalize(buf); |
| 203 | break; |
| 204 | default: |
| 205 | error = ENOTSUP; |
| 206 | } |
| 207 | (void) munmap(buf, pref->pref_len); |
| 208 | if (obj == NULL && error == 0) |
| 209 | error = EIO; |
| 210 | } |
| 211 | |
| 212 | out: |
| 213 | if (error == 0) |
| 214 | *objp = obj; |
| 215 | return (error); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * prop_array_internalize_from_pref -- |
| 220 | * Internalize a pref into a prop_array_t object. |
| 221 | */ |
| 222 | bool |
| 223 | prop_array_internalize_from_pref(const struct plistref *prefp, |
| 224 | prop_array_t *arrayp) |
| 225 | { |
| 226 | int rv; |
| 227 | |
| 228 | rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_ARRAY, |
| 229 | (prop_object_t *)arrayp); |
| 230 | if (rv != 0) |
| 231 | errno = rv; /* pass up error value in errno */ |
| 232 | return (rv == 0); |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * prop_array_recv_syscall -- |
| 237 | * Internalize an array received from the kernel as pref. |
| 238 | */ |
| 239 | int |
| 240 | prop_array_recv_syscall(const struct plistref *prefp, |
| 241 | prop_array_t *arrayp) |
| 242 | { |
| 243 | if (prop_array_internalize_from_pref(prefp, arrayp)) |
| 244 | return 0; |
| 245 | else |
| 246 | return errno; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * prop_dictionary_internalize_from_pref -- |
| 251 | * Internalize a pref into a prop_dictionary_t object. |
| 252 | */ |
| 253 | bool |
| 254 | prop_dictionary_internalize_from_pref(const struct plistref *prefp, |
| 255 | prop_dictionary_t *dictp) |
| 256 | { |
| 257 | int rv; |
| 258 | |
| 259 | rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_DICTIONARY, |
| 260 | (prop_object_t *)dictp); |
| 261 | if (rv != 0) |
| 262 | errno = rv; /* pass up error value in errno */ |
| 263 | return (rv == 0); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * prop_dictionary_recv_syscall -- |
| 268 | * Internalize a dictionary received from the kernel as pref. |
| 269 | */ |
| 270 | int |
| 271 | prop_dictionary_recv_syscall(const struct plistref *prefp, |
| 272 | prop_dictionary_t *dictp) |
| 273 | { |
| 274 | if (prop_dictionary_internalize_from_pref(prefp, dictp)) |
| 275 | return 0; |
| 276 | else |
| 277 | return errno; |
| 278 | } |
| 279 | |
| 280 | |
| 281 | /* |
| 282 | * prop_array_recv_ioctl -- |
| 283 | * Receive an array from the kernel using the specified ioctl. |
| 284 | */ |
| 285 | int |
| 286 | prop_array_recv_ioctl(int fd, unsigned long cmd, prop_array_t *arrayp) |
| 287 | { |
| 288 | int rv; |
| 289 | struct plistref pref; |
| 290 | |
| 291 | rv = ioctl(fd, cmd, &pref); |
| 292 | if (rv == -1) |
| 293 | return errno; |
| 294 | |
| 295 | rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_ARRAY, |
| 296 | (prop_object_t *)arrayp); |
| 297 | if (rv != 0) { |
| 298 | errno = rv; /* pass up error value in errno */ |
| 299 | return rv; |
| 300 | } else |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * prop_dictionary_recv_ioctl -- |
| 306 | * Receive a dictionary from the kernel using the specified ioctl. |
| 307 | */ |
| 308 | int |
| 309 | prop_dictionary_recv_ioctl(int fd, unsigned long cmd, prop_dictionary_t *dictp) |
| 310 | { |
| 311 | int rv; |
| 312 | struct plistref pref; |
| 313 | |
| 314 | rv = ioctl(fd, cmd, &pref); |
| 315 | if (rv == -1) |
| 316 | return errno; |
| 317 | |
| 318 | rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY, |
| 319 | (prop_object_t *)dictp); |
| 320 | if (rv != 0) { |
| 321 | errno = rv; /* pass up error value in errno */ |
| 322 | return rv; |
| 323 | } else |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | * prop_dictionary_sendrecv_ioctl -- |
| 329 | * Combination send/receive a dictionary to/from the kernel using |
| 330 | * the specified ioctl. |
| 331 | */ |
| 332 | int |
| 333 | prop_dictionary_sendrecv_ioctl(prop_dictionary_t dict, int fd, |
| 334 | unsigned long cmd, prop_dictionary_t *dictp) |
| 335 | { |
| 336 | struct plistref pref; |
| 337 | char *buf; |
| 338 | int error; |
| 339 | |
| 340 | error = _prop_object_externalize_to_pref(dict, &pref, &buf); |
| 341 | if (error != 0) { |
| 342 | errno = error; |
| 343 | return error; |
| 344 | } |
| 345 | |
| 346 | if (ioctl(fd, cmd, &pref) == -1) |
| 347 | error = errno; |
| 348 | else |
| 349 | error = 0; |
| 350 | |
| 351 | free(buf); |
| 352 | |
| 353 | if (error != 0) |
| 354 | return error; |
| 355 | |
| 356 | error = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY, |
| 357 | (prop_object_t *)dictp); |
| 358 | if (error != 0) { |
| 359 | errno = error; /* pass up error value in errno */ |
| 360 | return error; |
| 361 | } else |
| 362 | return 0; |
| 363 | } |
| 364 | #endif /* !_KERNEL && !_STANDALONE */ |
| 365 | |
| 366 | #if defined(_KERNEL) |
| 367 | #include <sys/param.h> |
| 368 | #include <sys/mman.h> |
| 369 | #include <sys/errno.h> |
| 370 | #include <sys/malloc.h> |
| 371 | #include <sys/systm.h> |
| 372 | #include <sys/proc.h> |
| 373 | #include <sys/resource.h> |
| 374 | #include <sys/objcache.h> |
| 375 | #include <sys/ioccom.h> |
| 376 | #include <vm/vm.h> |
| 377 | #include <vm/vm_extern.h> |
| 378 | #include <vm/vm_param.h> |
| 379 | |
| 380 | #include "prop_object_impl.h" |
| 381 | |
| 382 | /* Arbitrary limit ioctl input to 64KB */ |
| 383 | unsigned int prop_object_copyin_limit = 65536; |
| 384 | |
| 385 | static int |
| 386 | _prop_object_copyin(const struct plistref *pref, const prop_type_t type, |
| 387 | prop_object_t *objp) |
| 388 | { |
| 389 | prop_object_t obj = NULL; |
| 390 | char *buf; |
| 391 | int error; |
| 392 | |
| 393 | /* |
| 394 | * Allocate an extra byte so we can guarantee NUL-termination. |
| 395 | * |
| 396 | * Allow malloc to fail in case pmap would be exhausted. |
| 397 | */ |
| 398 | buf = kmalloc(pref->pref_len + 1, M_TEMP, M_WAITOK); |
| 399 | error = copyin(pref->pref_plist, buf, pref->pref_len); |
| 400 | if (error) { |
| 401 | kfree(buf, M_TEMP); |
| 402 | return (error); |
| 403 | } |
| 404 | buf[pref->pref_len] = '\0'; |
| 405 | |
| 406 | switch (type) { |
| 407 | case PROP_TYPE_ARRAY: |
| 408 | obj = prop_array_internalize(buf); |
| 409 | break; |
| 410 | case PROP_TYPE_DICTIONARY: |
| 411 | obj = prop_dictionary_internalize(buf); |
| 412 | break; |
| 413 | default: |
| 414 | error = ENOTSUP; |
| 415 | } |
| 416 | |
| 417 | kfree(buf, M_TEMP); |
| 418 | if (obj == NULL) { |
| 419 | if (error == 0) |
| 420 | error = EIO; |
| 421 | } else { |
| 422 | *objp = obj; |
| 423 | } |
| 424 | return (error); |
| 425 | } |
| 426 | |
| 427 | |
| 428 | static int |
| 429 | _prop_object_copyin_ioctl(const struct plistref *pref, const prop_type_t type, |
| 430 | const u_long cmd, prop_object_t *objp) |
| 431 | { |
| 432 | if ((cmd & IOC_IN) == 0) |
| 433 | return (EFAULT); |
| 434 | |
| 435 | return _prop_object_copyin(pref, type, objp); |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * prop_array_copyin -- |
| 440 | * Copy in an array passed as a syscall arg. |
| 441 | */ |
| 442 | int |
| 443 | prop_array_copyin(const struct plistref *pref, prop_array_t *arrayp) |
| 444 | { |
| 445 | return (_prop_object_copyin(pref, PROP_TYPE_ARRAY, |
| 446 | (prop_object_t *)arrayp)); |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * prop_dictionary_copyin -- |
| 451 | * Copy in a dictionary passed as a syscall arg. |
| 452 | */ |
| 453 | int |
| 454 | prop_dictionary_copyin(const struct plistref *pref, prop_dictionary_t *dictp) |
| 455 | { |
| 456 | return (_prop_object_copyin(pref, PROP_TYPE_DICTIONARY, |
| 457 | (prop_object_t *)dictp)); |
| 458 | } |
| 459 | |
| 460 | |
| 461 | /* |
| 462 | * prop_array_copyin_ioctl -- |
| 463 | * Copy in an array send with an ioctl. |
| 464 | */ |
| 465 | int |
| 466 | prop_array_copyin_ioctl(const struct plistref *pref, const u_long cmd, |
| 467 | prop_array_t *arrayp) |
| 468 | { |
| 469 | return (_prop_object_copyin_ioctl(pref, PROP_TYPE_ARRAY, |
| 470 | cmd, (prop_object_t *)arrayp)); |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * prop_dictionary_copyin_ioctl -- |
| 475 | * Copy in a dictionary sent with an ioctl. |
| 476 | */ |
| 477 | int |
| 478 | prop_dictionary_copyin_ioctl(const struct plistref *pref, const u_long cmd, |
| 479 | prop_dictionary_t *dictp) |
| 480 | { |
| 481 | return (_prop_object_copyin_ioctl(pref, PROP_TYPE_DICTIONARY, |
| 482 | cmd, (prop_object_t *)dictp)); |
| 483 | } |
| 484 | |
| 485 | static int |
| 486 | _prop_object_copyout(struct plistref *pref, prop_object_t obj) |
| 487 | { |
| 488 | struct proc *p = curproc; |
| 489 | char *buf; |
| 490 | size_t len, rlen; |
| 491 | int error = 0; |
| 492 | vm_offset_t uaddr; |
| 493 | |
| 494 | switch (prop_object_type(obj)) { |
| 495 | case PROP_TYPE_ARRAY: |
| 496 | buf = prop_array_externalize(obj); |
| 497 | break; |
| 498 | case PROP_TYPE_DICTIONARY: |
| 499 | buf = prop_dictionary_externalize(obj); |
| 500 | break; |
| 501 | default: |
| 502 | return (ENOTSUP); |
| 503 | } |
| 504 | if (buf == NULL) |
| 505 | return (ENOMEM); |
| 506 | |
| 507 | len = strlen(buf) + 1; |
| 508 | rlen = round_page(len); |
| 509 | |
| 510 | /* |
| 511 | * See sys_mmap() in sys/uvm/uvm_mmap.c. |
| 512 | * Let's act as if we were calling mmap(0, ...) |
| 513 | */ |
| 514 | #if 0 |
| 515 | uaddr = p->p_emul->e_vm_default_addr(p, |
| 516 | (vaddr_t)p->p_vmspace->vm_daddr, rlen); |
| 517 | #endif |
| 518 | uaddr = round_page((vm_offset_t)p->p_vmspace->vm_daddr + maxdsiz); |
| 519 | |
| 520 | error = vm_mmap(&p->p_vmspace->vm_map, |
| 521 | &uaddr, rlen, |
| 522 | VM_PROT_READ|VM_PROT_WRITE, |
| 523 | VM_PROT_READ|VM_PROT_WRITE, |
| 524 | MAP_PRIVATE|MAP_ANON, |
| 525 | NULL, 0, NULL); |
| 526 | if (error == 0) { |
| 527 | error = copyout(buf, (char *)uaddr, len); |
| 528 | if (error == 0) { |
| 529 | pref->pref_plist = (char *)uaddr; |
| 530 | pref->pref_len = len; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | kfree(buf, M_TEMP); |
| 535 | |
| 536 | return (error); |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | * prop_array_copyout -- |
| 541 | * Copy out an array to a syscall arg. |
| 542 | */ |
| 543 | int |
| 544 | prop_array_copyout(struct plistref *pref, prop_array_t array) |
| 545 | { |
| 546 | return (_prop_object_copyout(pref, array)); |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * prop_dictionary_copyout -- |
| 551 | * Copy out a dictionary to a syscall arg. |
| 552 | */ |
| 553 | int |
| 554 | prop_dictionary_copyout(struct plistref *pref, prop_dictionary_t dict) |
| 555 | { |
| 556 | return (_prop_object_copyout(pref, dict)); |
| 557 | } |
| 558 | |
| 559 | static int |
| 560 | _prop_object_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 561 | prop_object_t obj) |
| 562 | { |
| 563 | if ((cmd & IOC_OUT) == 0) |
| 564 | return (EFAULT); |
| 565 | return _prop_object_copyout(pref, obj); |
| 566 | } |
| 567 | |
| 568 | |
| 569 | /* |
| 570 | * prop_array_copyout_ioctl -- |
| 571 | * Copy out an array being received with an ioctl. |
| 572 | */ |
| 573 | int |
| 574 | prop_array_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 575 | prop_array_t array) |
| 576 | { |
| 577 | return (_prop_object_copyout_ioctl(pref, cmd, array)); |
| 578 | } |
| 579 | |
| 580 | /* |
| 581 | * prop_dictionary_copyout_ioctl -- |
| 582 | * Copy out a dictionary being received with an ioctl. |
| 583 | */ |
| 584 | int |
| 585 | prop_dictionary_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 586 | prop_dictionary_t dict) |
| 587 | { |
| 588 | return ( |
| 589 | _prop_object_copyout_ioctl(pref, cmd, dict)); |
| 590 | } |
| 591 | #endif /* _KERNEL */ |