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 | |