| 1 | /* $NetBSD: prop_kern.c,v 1.19 2015/05/11 16:48:34 christos 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 | #if defined(__NetBSD__) |
| 33 | |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/ioctl.h> |
| 36 | |
| 37 | #include <prop/proplib.h> |
| 38 | |
| 39 | #if !defined(_KERNEL) && !defined(_STANDALONE) |
| 40 | #include <sys/mman.h> |
| 41 | #include <errno.h> |
| 42 | #include <string.h> |
| 43 | #include <stdlib.h> |
| 44 | #include <stdio.h> |
| 45 | |
| 46 | #ifdef RUMP_ACTION |
| 47 | #include <rump/rump_syscalls.h> |
| 48 | #define ioctl(a,b,c) rump_sys_ioctl(a,b,c) |
| 49 | #endif |
| 50 | |
| 51 | static int |
| 52 | _prop_object_externalize_to_pref(prop_object_t obj, struct plistref *pref, |
| 53 | char **bufp) |
| 54 | { |
| 55 | char *buf; |
| 56 | |
| 57 | switch (prop_object_type(obj)) { |
| 58 | case PROP_TYPE_DICTIONARY: |
| 59 | buf = prop_dictionary_externalize(obj); |
| 60 | break; |
| 61 | case PROP_TYPE_ARRAY: |
| 62 | buf = prop_array_externalize(obj); |
| 63 | break; |
| 64 | default: |
| 65 | return (ENOTSUP); |
| 66 | } |
| 67 | if (buf == NULL) { |
| 68 | /* Assume we ran out of memory. */ |
| 69 | return (ENOMEM); |
| 70 | } |
| 71 | pref->pref_plist = buf; |
| 72 | pref->pref_len = strlen(buf) + 1; |
| 73 | |
| 74 | *bufp = buf; |
| 75 | |
| 76 | return (0); |
| 77 | } |
| 78 | |
| 79 | bool |
| 80 | prop_array_externalize_to_pref(prop_array_t array, struct plistref *prefp) |
| 81 | { |
| 82 | char *buf; |
| 83 | int rv; |
| 84 | |
| 85 | rv = _prop_object_externalize_to_pref(array, prefp, &buf); |
| 86 | if (rv != 0) |
| 87 | errno = rv; /* pass up error value in errno */ |
| 88 | return (rv == 0); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * prop_array_externalize_to_pref -- |
| 93 | * Externalize an array into a plistref for sending to the kernel. |
| 94 | */ |
| 95 | int |
| 96 | prop_array_send_syscall(prop_array_t array, struct plistref *prefp) |
| 97 | { |
| 98 | if (prop_array_externalize_to_pref(array, prefp)) |
| 99 | return 0; |
| 100 | else |
| 101 | return errno; |
| 102 | } |
| 103 | |
| 104 | bool |
| 105 | prop_dictionary_externalize_to_pref(prop_dictionary_t dict, |
| 106 | struct plistref *prefp) |
| 107 | { |
| 108 | char *buf; |
| 109 | int rv; |
| 110 | |
| 111 | rv = _prop_object_externalize_to_pref(dict, prefp, &buf); |
| 112 | if (rv != 0) |
| 113 | errno = rv; /* pass up error value in errno */ |
| 114 | return (rv == 0); |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * prop_dictionary_externalize_to_pref -- |
| 119 | * Externalize an dictionary into a plistref for sending to the kernel. |
| 120 | */ |
| 121 | int |
| 122 | prop_dictionary_send_syscall(prop_dictionary_t dict, |
| 123 | struct plistref *prefp) |
| 124 | { |
| 125 | if (prop_dictionary_externalize_to_pref(dict, prefp)) |
| 126 | return 0; |
| 127 | else |
| 128 | return errno; |
| 129 | } |
| 130 | |
| 131 | static int |
| 132 | _prop_object_send_ioctl(prop_object_t obj, int fd, unsigned long cmd) |
| 133 | { |
| 134 | struct plistref pref; |
| 135 | char *buf; |
| 136 | int error; |
| 137 | |
| 138 | error = _prop_object_externalize_to_pref(obj, &pref, &buf); |
| 139 | if (error) |
| 140 | return (error); |
| 141 | |
| 142 | if (ioctl(fd, cmd, &pref) == -1) |
| 143 | error = errno; |
| 144 | else |
| 145 | error = 0; |
| 146 | |
| 147 | free(buf); |
| 148 | |
| 149 | return (error); |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * prop_array_send_ioctl -- |
| 154 | * Send an array to the kernel using the specified ioctl. |
| 155 | */ |
| 156 | int |
| 157 | prop_array_send_ioctl(prop_array_t array, int fd, unsigned long cmd) |
| 158 | { |
| 159 | int rv; |
| 160 | |
| 161 | rv = _prop_object_send_ioctl(array, fd, cmd); |
| 162 | if (rv != 0) { |
| 163 | errno = rv; /* pass up error value in errno */ |
| 164 | return rv; |
| 165 | } else |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * prop_dictionary_send_ioctl -- |
| 171 | * Send a dictionary to the kernel using the specified ioctl. |
| 172 | */ |
| 173 | int |
| 174 | prop_dictionary_send_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd) |
| 175 | { |
| 176 | int rv; |
| 177 | |
| 178 | rv = _prop_object_send_ioctl(dict, fd, cmd); |
| 179 | if (rv != 0) { |
| 180 | errno = rv; /* pass up error value in errno */ |
| 181 | return rv; |
| 182 | } else |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | static int |
| 187 | _prop_object_internalize_from_pref(const struct plistref *pref, |
| 188 | prop_type_t type, prop_object_t *objp) |
| 189 | { |
| 190 | prop_object_t obj = NULL; |
| 191 | char *buf; |
| 192 | int error = 0; |
| 193 | |
| 194 | if (pref->pref_len == 0) { |
| 195 | /* |
| 196 | * This should never happen; we should always get the XML |
| 197 | * for an empty dictionary if it's really empty. |
| 198 | */ |
| 199 | error = EIO; |
| 200 | goto out; |
| 201 | } else { |
| 202 | buf = pref->pref_plist; |
| 203 | buf[pref->pref_len - 1] = '\0'; /* extra insurance */ |
| 204 | switch (type) { |
| 205 | case PROP_TYPE_DICTIONARY: |
| 206 | obj = prop_dictionary_internalize(buf); |
| 207 | break; |
| 208 | case PROP_TYPE_ARRAY: |
| 209 | obj = prop_array_internalize(buf); |
| 210 | break; |
| 211 | default: |
| 212 | error = ENOTSUP; |
| 213 | } |
| 214 | (void) munmap(buf, pref->pref_len); |
| 215 | if (obj == NULL && error == 0) |
| 216 | error = EIO; |
| 217 | } |
| 218 | |
| 219 | out: |
| 220 | if (error == 0) |
| 221 | *objp = obj; |
| 222 | return (error); |
| 223 | } |
| 224 | |
| 225 | /* |
| 226 | * prop_array_internalize_from_pref -- |
| 227 | * Internalize a pref into a prop_array_t object. |
| 228 | */ |
| 229 | bool |
| 230 | prop_array_internalize_from_pref(const struct plistref *prefp, |
| 231 | prop_array_t *arrayp) |
| 232 | { |
| 233 | int rv; |
| 234 | |
| 235 | rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_ARRAY, |
| 236 | (prop_object_t *)arrayp); |
| 237 | if (rv != 0) |
| 238 | errno = rv; /* pass up error value in errno */ |
| 239 | return (rv == 0); |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * prop_array_recv_syscall -- |
| 244 | * Internalize an array received from the kernel as pref. |
| 245 | */ |
| 246 | int |
| 247 | prop_array_recv_syscall(const struct plistref *prefp, |
| 248 | prop_array_t *arrayp) |
| 249 | { |
| 250 | if (prop_array_internalize_from_pref(prefp, arrayp)) |
| 251 | return 0; |
| 252 | else |
| 253 | return errno; |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * prop_dictionary_internalize_from_pref -- |
| 258 | * Internalize a pref into a prop_dictionary_t object. |
| 259 | */ |
| 260 | bool |
| 261 | prop_dictionary_internalize_from_pref(const struct plistref *prefp, |
| 262 | prop_dictionary_t *dictp) |
| 263 | { |
| 264 | int rv; |
| 265 | |
| 266 | rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_DICTIONARY, |
| 267 | (prop_object_t *)dictp); |
| 268 | if (rv != 0) |
| 269 | errno = rv; /* pass up error value in errno */ |
| 270 | return (rv == 0); |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * prop_dictionary_recv_syscall -- |
| 275 | * Internalize a dictionary received from the kernel as pref. |
| 276 | */ |
| 277 | int |
| 278 | prop_dictionary_recv_syscall(const struct plistref *prefp, |
| 279 | prop_dictionary_t *dictp) |
| 280 | { |
| 281 | if (prop_dictionary_internalize_from_pref(prefp, dictp)) |
| 282 | return 0; |
| 283 | else |
| 284 | return errno; |
| 285 | } |
| 286 | |
| 287 | |
| 288 | /* |
| 289 | * prop_array_recv_ioctl -- |
| 290 | * Receive an array from the kernel using the specified ioctl. |
| 291 | */ |
| 292 | int |
| 293 | prop_array_recv_ioctl(int fd, unsigned long cmd, prop_array_t *arrayp) |
| 294 | { |
| 295 | int rv; |
| 296 | struct plistref pref; |
| 297 | |
| 298 | rv = ioctl(fd, cmd, &pref); |
| 299 | if (rv == -1) |
| 300 | return errno; |
| 301 | |
| 302 | rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_ARRAY, |
| 303 | (prop_object_t *)arrayp); |
| 304 | if (rv != 0) { |
| 305 | errno = rv; /* pass up error value in errno */ |
| 306 | return rv; |
| 307 | } else |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | /* |
| 312 | * prop_dictionary_recv_ioctl -- |
| 313 | * Receive a dictionary from the kernel using the specified ioctl. |
| 314 | */ |
| 315 | int |
| 316 | prop_dictionary_recv_ioctl(int fd, unsigned long cmd, prop_dictionary_t *dictp) |
| 317 | { |
| 318 | int rv; |
| 319 | struct plistref pref; |
| 320 | |
| 321 | rv = ioctl(fd, cmd, &pref); |
| 322 | if (rv == -1) |
| 323 | return errno; |
| 324 | |
| 325 | rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY, |
| 326 | (prop_object_t *)dictp); |
| 327 | if (rv != 0) { |
| 328 | errno = rv; /* pass up error value in errno */ |
| 329 | return rv; |
| 330 | } else |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * prop_dictionary_sendrecv_ioctl -- |
| 336 | * Combination send/receive a dictionary to/from the kernel using |
| 337 | * the specified ioctl. |
| 338 | */ |
| 339 | int |
| 340 | prop_dictionary_sendrecv_ioctl(prop_dictionary_t dict, int fd, |
| 341 | unsigned long cmd, prop_dictionary_t *dictp) |
| 342 | { |
| 343 | struct plistref pref; |
| 344 | char *buf; |
| 345 | int error; |
| 346 | |
| 347 | error = _prop_object_externalize_to_pref(dict, &pref, &buf); |
| 348 | if (error != 0) { |
| 349 | errno = error; |
| 350 | return error; |
| 351 | } |
| 352 | |
| 353 | if (ioctl(fd, cmd, &pref) == -1) |
| 354 | error = errno; |
| 355 | else |
| 356 | error = 0; |
| 357 | |
| 358 | free(buf); |
| 359 | |
| 360 | if (error != 0) |
| 361 | return error; |
| 362 | |
| 363 | error = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY, |
| 364 | (prop_object_t *)dictp); |
| 365 | if (error != 0) { |
| 366 | errno = error; /* pass up error value in errno */ |
| 367 | return error; |
| 368 | } else |
| 369 | return 0; |
| 370 | } |
| 371 | #endif /* !_KERNEL && !_STANDALONE */ |
| 372 | |
| 373 | #if defined(_KERNEL) |
| 374 | #include <sys/param.h> |
| 375 | #include <sys/mman.h> |
| 376 | #include <sys/errno.h> |
| 377 | #include <sys/malloc.h> |
| 378 | #include <sys/systm.h> |
| 379 | #include <sys/proc.h> |
| 380 | #include <sys/resource.h> |
| 381 | #include <sys/pool.h> |
| 382 | |
| 383 | #include <uvm/uvm_extern.h> |
| 384 | |
| 385 | #include "prop_object_impl.h" |
| 386 | |
| 387 | /* Arbitrary limit ioctl input to 64KB */ |
| 388 | unsigned int prop_object_copyin_limit = 65536; |
| 389 | |
| 390 | /* initialize proplib for use in the kernel */ |
| 391 | void |
| 392 | prop_kern_init(void) |
| 393 | { |
| 394 | __link_set_decl(prop_linkpools, struct prop_pool_init); |
| 395 | struct prop_pool_init * const *pi; |
| 396 | |
| 397 | __link_set_foreach(pi, prop_linkpools) |
| 398 | pool_init((*pi)->pp, (*pi)->size, 0, 0, 0, (*pi)->wchan, |
| 399 | &pool_allocator_nointr, IPL_NONE); |
| 400 | } |
| 401 | |
| 402 | static int |
| 403 | _prop_object_copyin(const struct plistref *pref, const prop_type_t type, |
| 404 | prop_object_t *objp) |
| 405 | { |
| 406 | prop_object_t obj = NULL; |
| 407 | char *buf; |
| 408 | int error; |
| 409 | |
| 410 | if (pref->pref_len >= prop_object_copyin_limit) |
| 411 | return EINVAL; |
| 412 | |
| 413 | /* |
| 414 | * Allocate an extra byte so we can guarantee NUL-termination. |
| 415 | * |
| 416 | * Allow malloc to fail in case pmap would be exhausted. |
| 417 | */ |
| 418 | buf = malloc(pref->pref_len + 1, M_TEMP, M_WAITOK | M_CANFAIL); |
| 419 | if (buf == NULL) |
| 420 | return (ENOMEM); |
| 421 | error = copyin(pref->pref_plist, buf, pref->pref_len); |
| 422 | if (error) { |
| 423 | free(buf, M_TEMP); |
| 424 | return (error); |
| 425 | } |
| 426 | buf[pref->pref_len] = '\0'; |
| 427 | |
| 428 | switch (type) { |
| 429 | case PROP_TYPE_ARRAY: |
| 430 | obj = prop_array_internalize(buf); |
| 431 | break; |
| 432 | case PROP_TYPE_DICTIONARY: |
| 433 | obj = prop_dictionary_internalize(buf); |
| 434 | break; |
| 435 | default: |
| 436 | error = ENOTSUP; |
| 437 | } |
| 438 | |
| 439 | free(buf, M_TEMP); |
| 440 | if (obj == NULL) { |
| 441 | if (error == 0) |
| 442 | error = EIO; |
| 443 | } else { |
| 444 | *objp = obj; |
| 445 | } |
| 446 | return (error); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | static int |
| 451 | _prop_object_copyin_ioctl(const struct plistref *pref, const prop_type_t type, |
| 452 | const u_long cmd, prop_object_t *objp) |
| 453 | { |
| 454 | if ((cmd & IOC_IN) == 0) |
| 455 | return (EFAULT); |
| 456 | |
| 457 | return _prop_object_copyin(pref, type, objp); |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * prop_array_copyin -- |
| 462 | * Copy in an array passed as a syscall arg. |
| 463 | */ |
| 464 | int |
| 465 | prop_array_copyin(const struct plistref *pref, prop_array_t *arrayp) |
| 466 | { |
| 467 | return (_prop_object_copyin(pref, PROP_TYPE_ARRAY, |
| 468 | (prop_object_t *)arrayp)); |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * prop_dictionary_copyin -- |
| 473 | * Copy in a dictionary passed as a syscall arg. |
| 474 | */ |
| 475 | int |
| 476 | prop_dictionary_copyin(const struct plistref *pref, prop_dictionary_t *dictp) |
| 477 | { |
| 478 | return (_prop_object_copyin(pref, PROP_TYPE_DICTIONARY, |
| 479 | (prop_object_t *)dictp)); |
| 480 | } |
| 481 | |
| 482 | |
| 483 | /* |
| 484 | * prop_array_copyin_ioctl -- |
| 485 | * Copy in an array send with an ioctl. |
| 486 | */ |
| 487 | int |
| 488 | prop_array_copyin_ioctl(const struct plistref *pref, const u_long cmd, |
| 489 | prop_array_t *arrayp) |
| 490 | { |
| 491 | return (_prop_object_copyin_ioctl(pref, PROP_TYPE_ARRAY, |
| 492 | cmd, (prop_object_t *)arrayp)); |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * prop_dictionary_copyin_ioctl -- |
| 497 | * Copy in a dictionary sent with an ioctl. |
| 498 | */ |
| 499 | int |
| 500 | prop_dictionary_copyin_ioctl(const struct plistref *pref, const u_long cmd, |
| 501 | prop_dictionary_t *dictp) |
| 502 | { |
| 503 | return (_prop_object_copyin_ioctl(pref, PROP_TYPE_DICTIONARY, |
| 504 | cmd, (prop_object_t *)dictp)); |
| 505 | } |
| 506 | |
| 507 | static int |
| 508 | _prop_object_copyout(struct plistref *pref, prop_object_t obj) |
| 509 | { |
| 510 | struct lwp *l = curlwp; /* XXX */ |
| 511 | struct proc *p = l->l_proc; |
| 512 | char *buf; |
| 513 | void *uaddr; |
| 514 | size_t len, rlen; |
| 515 | int error = 0; |
| 516 | |
| 517 | switch (prop_object_type(obj)) { |
| 518 | case PROP_TYPE_ARRAY: |
| 519 | buf = prop_array_externalize(obj); |
| 520 | break; |
| 521 | case PROP_TYPE_DICTIONARY: |
| 522 | buf = prop_dictionary_externalize(obj); |
| 523 | break; |
| 524 | default: |
| 525 | return (ENOTSUP); |
| 526 | } |
| 527 | if (buf == NULL) |
| 528 | return (ENOMEM); |
| 529 | |
| 530 | len = strlen(buf) + 1; |
| 531 | rlen = round_page(len); |
| 532 | uaddr = NULL; |
| 533 | error = uvm_mmap_anon(p, &uaddr, rlen); |
| 534 | if (error == 0) { |
| 535 | error = copyout(buf, uaddr, len); |
| 536 | if (error == 0) { |
| 537 | pref->pref_plist = uaddr; |
| 538 | pref->pref_len = len; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | free(buf, M_TEMP); |
| 543 | |
| 544 | return (error); |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * prop_array_copyout -- |
| 549 | * Copy out an array to a syscall arg. |
| 550 | */ |
| 551 | int |
| 552 | prop_array_copyout(struct plistref *pref, prop_array_t array) |
| 553 | { |
| 554 | return (_prop_object_copyout(pref, array)); |
| 555 | } |
| 556 | |
| 557 | /* |
| 558 | * prop_dictionary_copyout -- |
| 559 | * Copy out a dictionary to a syscall arg. |
| 560 | */ |
| 561 | int |
| 562 | prop_dictionary_copyout(struct plistref *pref, prop_dictionary_t dict) |
| 563 | { |
| 564 | return (_prop_object_copyout(pref, dict)); |
| 565 | } |
| 566 | |
| 567 | static int |
| 568 | _prop_object_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 569 | prop_object_t obj) |
| 570 | { |
| 571 | if ((cmd & IOC_OUT) == 0) |
| 572 | return (EFAULT); |
| 573 | return _prop_object_copyout(pref, obj); |
| 574 | } |
| 575 | |
| 576 | |
| 577 | /* |
| 578 | * prop_array_copyout_ioctl -- |
| 579 | * Copy out an array being received with an ioctl. |
| 580 | */ |
| 581 | int |
| 582 | prop_array_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 583 | prop_array_t array) |
| 584 | { |
| 585 | return (_prop_object_copyout_ioctl(pref, cmd, array)); |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * prop_dictionary_copyout_ioctl -- |
| 590 | * Copy out a dictionary being received with an ioctl. |
| 591 | */ |
| 592 | int |
| 593 | prop_dictionary_copyout_ioctl(struct plistref *pref, const u_long cmd, |
| 594 | prop_dictionary_t dict) |
| 595 | { |
| 596 | return ( |
| 597 | _prop_object_copyout_ioctl(pref, cmd, dict)); |
| 598 | } |
| 599 | #endif /* _KERNEL */ |
| 600 | |
| 601 | #endif /* __NetBSD__ */ |
| 602 | |