1 /*-
2 * Copyright (c) 1999 Marcel Moolenaar
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 without 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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include "opt_compat.h"
33 #include "opt_kdtrace.h"
34
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/sdt.h>
38 #include <sys/systm.h>
39 #include <sys/sysctl.h>
40 #include <sys/proc.h>
41 #include <sys/malloc.h>
42 #include <sys/mount.h>
43 #include <sys/jail.h>
44 #include <sys/lock.h>
45 #include <sys/mutex.h>
46 #include <sys/sx.h>
47
48 #ifdef COMPAT_LINUX32
49 #include <machine/../linux32/linux.h>
50 #else
51 #include <machine/../linux/linux.h>
52 #endif
53 #include <compat/linux/linux_dtrace.h>
54 #include <compat/linux/linux_mib.h>
55
56 /* DTrace init */
57 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
58
59 /**
60 * DTrace probes in this module.
61 */
62 LIN_SDT_PROBE_DEFINE0(mib, linux_sysctl_osname, entry);
63 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_osname, sysctl_string_error, "int");
64 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_osname, return, "int");
65
66 LIN_SDT_PROBE_DEFINE0(mib, linux_sysctl_osrelease, entry);
67 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_osrelease, sysctl_string_error, "int");
68 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_osrelease, return, "int");
69 LIN_SDT_PROBE_DEFINE0(mib, linux_sysctl_oss_version, entry);
70 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_oss_version, sysctl_string_error,
71 "int");
72 LIN_SDT_PROBE_DEFINE1(mib, linux_sysctl_oss_version, return, "int");
73 LIN_SDT_PROBE_DEFINE2(mib, linux_map_osrel, entry, "char *", "int *");
74 LIN_SDT_PROBE_DEFINE1(mib, linux_map_osrel, return, "int");
75 LIN_SDT_PROBE_DEFINE2(mib, linux_get_prison, entry, "struct prison *",
76 "struct prison **");
77 LIN_SDT_PROBE_DEFINE1(mib, linux_get_prison, return, "struct linux_prison *");
78 LIN_SDT_PROBE_DEFINE2(mib, linux_alloc_prison, entry, "struct prison *",
79 "struct linux_prison **");
80 LIN_SDT_PROBE_DEFINE1(mib, linux_alloc_prison, return, "int");
81 LIN_SDT_PROBE_DEFINE2(mib, linux_prison_create, entry, "void *", "void *");
82 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_create, vfs_copyopt_error, "int");
83 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_create, return, "int");
84 LIN_SDT_PROBE_DEFINE2(mib, linux_prison_check, entry, "void *", "void *");
85 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_check, vfs_copyopt_error, "int");
86 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_check, vfs_getopt_error, "int");
87 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_check, return, "int");
88 LIN_SDT_PROBE_DEFINE2(mib, linux_prison_set, entry, "void *", "void *");
89 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_set, vfs_copyopt_error, "int");
90 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_set, vfs_getopt_error, "int");
91 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_set, return, "int");
92 LIN_SDT_PROBE_DEFINE2(mib, linux_prison_get, entry, "void *", "void *");
93 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_get, vfs_setopt_error, "int");
94 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_get, vfs_setopts_error, "int");
95 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_get, return, "int");
96 LIN_SDT_PROBE_DEFINE1(mib, linux_prison_destructor, entry, "void *");
97 LIN_SDT_PROBE_DEFINE0(mib, linux_prison_destructor, return);
98 LIN_SDT_PROBE_DEFINE0(mib, linux_osd_jail_register, entry);
99 LIN_SDT_PROBE_DEFINE0(mib, linux_osd_jail_register, return);
100 LIN_SDT_PROBE_DEFINE0(mib, linux_osd_jail_deregister, entry);
101 LIN_SDT_PROBE_DEFINE0(mib, linux_osd_jail_deregister, return);
102 LIN_SDT_PROBE_DEFINE2(mib, linux_get_osname, entry, "struct thread *",
103 "char *");
104 LIN_SDT_PROBE_DEFINE0(mib, linux_get_osname, return);
105 LIN_SDT_PROBE_DEFINE2(mib, linux_set_osname, entry, "struct thread *",
106 "char *");
107 LIN_SDT_PROBE_DEFINE1(mib, linux_set_osname, return, "int");
108 LIN_SDT_PROBE_DEFINE2(mib, linux_get_osrelease, entry, "struct thread *",
109 "char *");
110 LIN_SDT_PROBE_DEFINE0(mib, linux_get_osrelease, return);
111 LIN_SDT_PROBE_DEFINE1(mib, linux_kernver, entry, "struct thread *");
112 LIN_SDT_PROBE_DEFINE1(mib, linux_kernver, return, "int");
113 LIN_SDT_PROBE_DEFINE2(mib, linux_set_osrelease, entry, "struct thread *",
114 "char *");
115 LIN_SDT_PROBE_DEFINE1(mib, linux_set_osrelease, return, "int");
116 LIN_SDT_PROBE_DEFINE1(mib, linux_get_oss_version, entry, "struct thread *");
117 LIN_SDT_PROBE_DEFINE1(mib, linux_get_oss_version, return, "int");
118
119 LIN_SDT_PROBE_DEFINE2(mib, linux_set_oss_version, entry, "struct thread *",
120 "int");
121 LIN_SDT_PROBE_DEFINE1(mib, linux_set_oss_version, return, "int");
122
123 struct linux_prison {
124 char pr_osname[LINUX_MAX_UTSNAME];
125 char pr_osrelease[LINUX_MAX_UTSNAME];
126 int pr_oss_version;
127 int pr_osrel;
128 };
129
130 static struct linux_prison lprison0 = {
131 .pr_osname = "Linux",
132 .pr_osrelease = "2.6.18",
133 .pr_oss_version = 0x030600,
134 .pr_osrel = 2006018
135 };
136
137 static unsigned linux_osd_jail_slot;
138
139 static SYSCTL_NODE(_compat, OID_AUTO, linux, CTLFLAG_RW, 0,
140 "Linux mode");
141
142 static int linux_set_osname(struct thread *td, char *osname);
143 static int linux_set_osrelease(struct thread *td, char *osrelease);
144 static int linux_set_oss_version(struct thread *td, int oss_version);
145
146 static int
147 linux_sysctl_osname(SYSCTL_HANDLER_ARGS)
148 {
149 char osname[LINUX_MAX_UTSNAME];
150 int error;
151
152 LIN_SDT_PROBE0(mib, linux_sysctl_osname, entry);
153
154 linux_get_osname(req->td, osname);
155 error = sysctl_handle_string(oidp, osname, LINUX_MAX_UTSNAME, req);
156 if (error != 0 || req->newptr == NULL) {
157 LIN_SDT_PROBE1(mib, linux_sysctl_osname, sysctl_string_error,
158 error);
159 LIN_SDT_PROBE1(mib, linux_sysctl_osname, return, error);
160 return (error);
161 }
162 error = linux_set_osname(req->td, osname);
163
164 LIN_SDT_PROBE1(mib, linux_sysctl_osname, return, error);
165 return (error);
166 }
167
168 SYSCTL_PROC(_compat_linux, OID_AUTO, osname,
169 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
170 0, 0, linux_sysctl_osname, "A",
171 "Linux kernel OS name");
172
173 static int
174 linux_sysctl_osrelease(SYSCTL_HANDLER_ARGS)
175 {
176 char osrelease[LINUX_MAX_UTSNAME];
177 int error;
178
179 LIN_SDT_PROBE0(mib, linux_sysctl_osrelease, entry);
180
181 linux_get_osrelease(req->td, osrelease);
182 error = sysctl_handle_string(oidp, osrelease, LINUX_MAX_UTSNAME, req);
183 if (error != 0 || req->newptr == NULL) {
184 LIN_SDT_PROBE1(mib, linux_sysctl_osrelease, sysctl_string_error,
185 error);
186 LIN_SDT_PROBE1(mib, linux_sysctl_osrelease, return, error);
187 return (error);
188 }
189 error = linux_set_osrelease(req->td, osrelease);
190
191 LIN_SDT_PROBE1(mib, linux_sysctl_osrelease, return, error);
192 return (error);
193 }
194
195 SYSCTL_PROC(_compat_linux, OID_AUTO, osrelease,
196 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
197 0, 0, linux_sysctl_osrelease, "A",
198 "Linux kernel OS release");
199
200 static int
201 linux_sysctl_oss_version(SYSCTL_HANDLER_ARGS)
202 {
203 int oss_version;
204 int error;
205
206 LIN_SDT_PROBE0(mib, linux_sysctl_oss_version, entry);
207
208 oss_version = linux_get_oss_version(req->td);
209 error = sysctl_handle_int(oidp, &oss_version, 0, req);
210 if (error != 0 || req->newptr == NULL) {
211 LIN_SDT_PROBE1(mib, linux_sysctl_oss_version,
212 sysctl_string_error, error);
213 LIN_SDT_PROBE1(mib, linux_sysctl_oss_version, return, error);
214 return (error);
215 }
216 error = linux_set_oss_version(req->td, oss_version);
217
218 LIN_SDT_PROBE1(mib, linux_sysctl_oss_version, return, error);
219 return (error);
220 }
221
222 SYSCTL_PROC(_compat_linux, OID_AUTO, oss_version,
223 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
224 0, 0, linux_sysctl_oss_version, "I",
225 "Linux OSS version");
226
227 /*
228 * Map the osrelease into integer
229 */
230 static int
231 linux_map_osrel(char *osrelease, int *osrel)
232 {
233 char *sep, *eosrelease;
234 int len, v0, v1, v2, v;
235
236 LIN_SDT_PROBE2(mib, linux_map_osrel, entry, osrelease, osrel);
237
238 len = strlen(osrelease);
239 eosrelease = osrelease + len;
240 v0 = strtol(osrelease, &sep, 10);
241 if (osrelease == sep || sep + 1 >= eosrelease || *sep != '.') {
242 LIN_SDT_PROBE1(mib, linux_map_osrel, return, EINVAL);
243 return (EINVAL);
244 }
245 osrelease = sep + 1;
246 v1 = strtol(osrelease, &sep, 10);
247 if (osrelease == sep || sep + 1 >= eosrelease || *sep != '.') {
248 LIN_SDT_PROBE1(mib, linux_map_osrel, return, EINVAL);
249 return (EINVAL);
250 }
251 osrelease = sep + 1;
252 v2 = strtol(osrelease, &sep, 10);
253 if (osrelease == sep || sep != eosrelease) {
254 LIN_SDT_PROBE1(mib, linux_map_osrel, return, EINVAL);
255 return (EINVAL);
256 }
257
258 v = v0 * 1000000 + v1 * 1000 + v2;
259 if (v < 1000000) {
260 LIN_SDT_PROBE1(mib, linux_map_osrel, return, EINVAL);
261 return (EINVAL);
262 }
263
264 *osrel = v;
265
266 LIN_SDT_PROBE1(mib, linux_map_osrel, return, 0);
267 return (0);
268 }
269
270 /*
271 * Find a prison with Linux info.
272 * Return the Linux info and the (locked) prison.
273 */
274 static struct linux_prison *
275 linux_find_prison(struct prison *spr, struct prison **prp)
276 {
277 struct prison *pr;
278 struct linux_prison *lpr;
279
280 LIN_SDT_PROBE2(mib, linux_get_prison, entry, spr, prp);
281
282 if (!linux_osd_jail_slot)
283 /* In case osd_register failed. */
284 spr = &prison0;
285 for (pr = spr;; pr = pr->pr_parent) {
286 mtx_lock(&pr->pr_mtx);
287 lpr = (pr == &prison0)
288 ? &lprison0
289 : osd_jail_get(pr, linux_osd_jail_slot);
290 if (lpr != NULL)
291 break;
292 mtx_unlock(&pr->pr_mtx);
293 }
294 *prp = pr;
295
296 LIN_SDT_PROBE1(mib, linux_get_prison, return, lpr);
297 return (lpr);
298 }
299
300 /*
301 * Ensure a prison has its own Linux info. If lprp is non-null, point it to
302 * the Linux info and lock the prison.
303 */
304 static int
305 linux_alloc_prison(struct prison *pr, struct linux_prison **lprp)
306 {
307 struct prison *ppr;
308 struct linux_prison *lpr, *nlpr;
309 int error;
310
311 LIN_SDT_PROBE2(mib, linux_alloc_prison, entry, pr, lprp);
312
313 /* If this prison already has Linux info, return that. */
314 error = 0;
315 lpr = linux_find_prison(pr, &ppr);
316 if (ppr == pr)
317 goto done;
318 /*
319 * Allocate a new info record. Then check again, in case something
320 * changed during the allocation.
321 */
322 mtx_unlock(&ppr->pr_mtx);
323 nlpr = malloc(sizeof(struct linux_prison), M_PRISON, M_WAITOK);
324 lpr = linux_find_prison(pr, &ppr);
325 if (ppr == pr) {
326 free(nlpr, M_PRISON);
327 goto done;
328 }
329 /* Inherit the initial values from the ancestor. */
330 mtx_lock(&pr->pr_mtx);
331 error = osd_jail_set(pr, linux_osd_jail_slot, nlpr);
332 if (error == 0) {
333 bcopy(lpr, nlpr, sizeof(*lpr));
334 lpr = nlpr;
335 } else {
336 free(nlpr, M_PRISON);
337 lpr = NULL;
338 }
339 mtx_unlock(&ppr->pr_mtx);
340 done:
341 if (lprp != NULL)
342 *lprp = lpr;
343 else
344 mtx_unlock(&pr->pr_mtx);
345
346 LIN_SDT_PROBE1(mib, linux_alloc_prison, return, error);
347 return (error);
348 }
349
350 /*
351 * Jail OSD methods for Linux prison data.
352 */
353 static int
354 linux_prison_create(void *obj, void *data)
355 {
356 struct prison *pr = obj;
357 struct vfsoptlist *opts = data;
358 int jsys, error;
359
360 LIN_SDT_PROBE2(mib, linux_prison_create, entry, obj, data);
361
362 error = vfs_copyopt(opts, "linux", &jsys, sizeof(jsys));
363 if (error != 0) {
364 LIN_SDT_PROBE1(mib, linux_prison_create, vfs_copyopt_error,
365 error);
366 } else if (jsys == JAIL_SYS_INHERIT) {
367 LIN_SDT_PROBE1(mib, linux_prison_create, return, 0);
368 return (0);
369 }
370 /*
371 * Inherit a prison's initial values from its parent
372 * (different from JAIL_SYS_INHERIT which also inherits changes).
373 */
374 error = linux_alloc_prison(pr, NULL);
375
376 LIN_SDT_PROBE1(mib, linux_prison_create, return, error);
377 return (error);
378 }
379
380 static int
381 linux_prison_check(void *obj __unused, void *data)
382 {
383 struct vfsoptlist *opts = data;
384 char *osname, *osrelease;
385 int error, jsys, len, osrel, oss_version;
386
387 LIN_SDT_PROBE2(mib, linux_prison_check, entry, obj, data);
388
389 /* Check that the parameters are correct. */
390 error = vfs_copyopt(opts, "linux", &jsys, sizeof(jsys));
391 if (error != 0) {
392 LIN_SDT_PROBE1(mib, linux_prison_check, vfs_copyopt_error,
393 error);
394 }
395 if (error != ENOENT) {
396 if (error != 0) {
397 LIN_SDT_PROBE1(mib, linux_prison_check, return, error);
398 return (error);
399 }
400 if (jsys != JAIL_SYS_NEW && jsys != JAIL_SYS_INHERIT) {
401 LIN_SDT_PROBE1(mib, linux_prison_check, return, EINVAL);
402 return (EINVAL);
403 }
404 }
405 error = vfs_getopt(opts, "linux.osname", (void **)&osname, &len);
406 if (error != 0) {
407 LIN_SDT_PROBE1(mib, linux_prison_check, vfs_getopt_error,
408 error);
409 }
410 if (error != ENOENT) {
411 if (error != 0) {
412 LIN_SDT_PROBE1(mib, linux_prison_check, return, error);
413 return (error);
414 }
415 if (len == 0 || osname[len - 1] != '\0') {
416 LIN_SDT_PROBE1(mib, linux_prison_check, return, EINVAL);
417 return (EINVAL);
418 }
419 if (len > LINUX_MAX_UTSNAME) {
420 vfs_opterror(opts, "linux.osname too long");
421 LIN_SDT_PROBE1(mib, linux_prison_check, return,
422 ENAMETOOLONG);
423 return (ENAMETOOLONG);
424 }
425 }
426 error = vfs_getopt(opts, "linux.osrelease", (void **)&osrelease, &len);
427 if (error != 0) {
428 LIN_SDT_PROBE1(mib, linux_prison_check, vfs_getopt_error,
429 error);
430 }
431 if (error != ENOENT) {
432 if (error != 0) {
433 LIN_SDT_PROBE1(mib, linux_prison_check, return, error);
434 return (error);
435 }
436 if (len == 0 || osrelease[len - 1] != '\0') {
437 LIN_SDT_PROBE1(mib, linux_prison_check, return, EINVAL);
438 return (EINVAL);
439 }
440 if (len > LINUX_MAX_UTSNAME) {
441 vfs_opterror(opts, "linux.osrelease too long");
442 LIN_SDT_PROBE1(mib, linux_prison_check, return,
443 ENAMETOOLONG);
444 return (ENAMETOOLONG);
445 }
446 error = linux_map_osrel(osrelease, &osrel);
447 if (error != 0) {
448 vfs_opterror(opts, "linux.osrelease format error");
449 LIN_SDT_PROBE1(mib, linux_prison_check, return, error);
450 return (error);
451 }
452 }
453 error = vfs_copyopt(opts, "linux.oss_version", &oss_version,
454 sizeof(oss_version));
455 if (error != 0)
456 LIN_SDT_PROBE1(mib, linux_prison_check, vfs_copyopt_error, error);
457
458 if (error == ENOENT)
459 error = 0;
460 LIN_SDT_PROBE1(mib, linux_prison_check, return, error);
461 return (error);
462 }
463
464 static int
465 linux_prison_set(void *obj, void *data)
466 {
467 struct linux_prison *lpr;
468 struct prison *pr = obj;
469 struct vfsoptlist *opts = data;
470 char *osname, *osrelease;
471 int error, gotversion, jsys, len, oss_version;
472
473 LIN_SDT_PROBE2(mib, linux_prison_set, entry, obj, data);
474
475 /* Set the parameters, which should be correct. */
476 error = vfs_copyopt(opts, "linux", &jsys, sizeof(jsys));
477 if (error != 0)
478 LIN_SDT_PROBE1(mib, linux_prison_set, vfs_copyopt_error, error);
479 if (error == ENOENT)
480 jsys = -1;
481 error = vfs_getopt(opts, "linux.osname", (void **)&osname, &len);
482 if (error != 0)
483 LIN_SDT_PROBE1(mib, linux_prison_set, vfs_getopt_error, error);
484 if (error == ENOENT)
485 osname = NULL;
486 else
487 jsys = JAIL_SYS_NEW;
488 error = vfs_getopt(opts, "linux.osrelease", (void **)&osrelease, &len);
489 if (error != 0)
490 LIN_SDT_PROBE1(mib, linux_prison_set, vfs_getopt_error, error);
491 if (error == ENOENT)
492 osrelease = NULL;
493 else
494 jsys = JAIL_SYS_NEW;
495 error = vfs_copyopt(opts, "linux.oss_version", &oss_version,
496 sizeof(oss_version));
497 if (error != 0)
498 LIN_SDT_PROBE1(mib, linux_prison_set, vfs_copyopt_error, error);
499 if (error == ENOENT)
500 gotversion = 0;
501 else {
502 gotversion = 1;
503 jsys = JAIL_SYS_NEW;
504 }
505 switch (jsys) {
506 case JAIL_SYS_INHERIT:
507 /* "linux=inherit": inherit the parent's Linux info. */
508 mtx_lock(&pr->pr_mtx);
509 osd_jail_del(pr, linux_osd_jail_slot);
510 mtx_unlock(&pr->pr_mtx);
511 break;
512 case JAIL_SYS_NEW:
513 /*
514 * "linux=new" or "linux.*":
515 * the prison gets its own Linux info.
516 */
517 error = linux_alloc_prison(pr, &lpr);
518 if (error) {
519 mtx_unlock(&pr->pr_mtx);
520 LIN_SDT_PROBE1(mib, linux_prison_set, return, error);
521 return (error);
522 }
523 if (osrelease) {
524 error = linux_map_osrel(osrelease, &lpr->pr_osrel);
525 if (error) {
526 mtx_unlock(&pr->pr_mtx);
527 LIN_SDT_PROBE1(mib, linux_prison_set, return,
528 error);
529 return (error);
530 }
531 strlcpy(lpr->pr_osrelease, osrelease,
532 LINUX_MAX_UTSNAME);
533 }
534 if (osname)
535 strlcpy(lpr->pr_osname, osname, LINUX_MAX_UTSNAME);
536 if (gotversion)
537 lpr->pr_oss_version = oss_version;
538 mtx_unlock(&pr->pr_mtx);
539 }
540
541 LIN_SDT_PROBE1(mib, linux_prison_set, return, 0);
542 return (0);
543 }
544
545 SYSCTL_JAIL_PARAM_SYS_NODE(linux, CTLFLAG_RW, "Jail Linux parameters");
546 SYSCTL_JAIL_PARAM_STRING(_linux, osname, CTLFLAG_RW, LINUX_MAX_UTSNAME,
547 "Jail Linux kernel OS name");
548 SYSCTL_JAIL_PARAM_STRING(_linux, osrelease, CTLFLAG_RW, LINUX_MAX_UTSNAME,
549 "Jail Linux kernel OS release");
550 SYSCTL_JAIL_PARAM(_linux, oss_version, CTLTYPE_INT | CTLFLAG_RW,
551 "I", "Jail Linux OSS version");
552
553 static int
554 linux_prison_get(void *obj, void *data)
555 {
556 struct linux_prison *lpr;
557 struct prison *ppr;
558 struct prison *pr = obj;
559 struct vfsoptlist *opts = data;
560 int error, i;
561
562 static int version0;
563
564 LIN_SDT_PROBE2(mib, linux_prison_get, entry, obj, data);
565
566 /* See if this prison is the one with the Linux info. */
567 lpr = linux_find_prison(pr, &ppr);
568 i = (ppr == pr) ? JAIL_SYS_NEW : JAIL_SYS_INHERIT;
569 error = vfs_setopt(opts, "linux", &i, sizeof(i));
570 if (error != 0) {
571 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopt_error, error);
572 if (error != ENOENT)
573 goto done;
574 }
575 if (i) {
576 error = vfs_setopts(opts, "linux.osname", lpr->pr_osname);
577 if (error != 0) {
578 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopts_error,
579 error);
580 if (error != ENOENT)
581 goto done;
582 }
583 error = vfs_setopts(opts, "linux.osrelease", lpr->pr_osrelease);
584 if (error != 0) {
585 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopts_error,
586 error);
587 if (error != ENOENT)
588 goto done;
589 }
590 error = vfs_setopt(opts, "linux.oss_version",
591 &lpr->pr_oss_version, sizeof(lpr->pr_oss_version));
592 if (error != 0) {
593 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopt_error,
594 error);
595 if(error != ENOENT)
596 goto done;
597 }
598 } else {
599 /*
600 * If this prison is inheriting its Linux info, report
601 * empty/zero parameters.
602 */
603 error = vfs_setopts(opts, "linux.osname", "");
604 if (error != 0) {
605 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopts_error,
606 error);
607 if(error != ENOENT)
608 goto done;
609 }
610 error = vfs_setopts(opts, "linux.osrelease", "");
611 if (error != 0) {
612 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopts_error,
613 error);
614 if(error != ENOENT)
615 goto done;
616 }
617 error = vfs_setopt(opts, "linux.oss_version", &version0,
618 sizeof(lpr->pr_oss_version));
619 if (error != 0) {
620 LIN_SDT_PROBE1(mib, linux_prison_get, vfs_setopt_error,
621 error);
622 if(error != ENOENT)
623 goto done;
624 }
625 }
626 error = 0;
627
628 done:
629 mtx_unlock(&ppr->pr_mtx);
630
631 LIN_SDT_PROBE1(mib, linux_prison_get, return, error);
632 return (error);
633 }
634
635 static void
636 linux_prison_destructor(void *data)
637 {
638
639 LIN_SDT_PROBE1(mib, linux_prison_destructor, entry, data);
640 free(data, M_PRISON);
641 LIN_SDT_PROBE0(mib, linux_prison_destructor, return);
642 }
643
644 void
645 linux_osd_jail_register(void)
646 {
647 struct prison *pr;
648 osd_method_t methods[PR_MAXMETHOD] = {
649 [PR_METHOD_CREATE] = linux_prison_create,
650 [PR_METHOD_GET] = linux_prison_get,
651 [PR_METHOD_SET] = linux_prison_set,
652 [PR_METHOD_CHECK] = linux_prison_check
653 };
654
655 LIN_SDT_PROBE0(mib, linux_osd_jail_register, entry);
656
657 linux_osd_jail_slot =
658 osd_jail_register(linux_prison_destructor, methods);
659 if (linux_osd_jail_slot > 0) {
660 /* Copy the system linux info to any current prisons. */
661 sx_xlock(&allprison_lock);
662 TAILQ_FOREACH(pr, &allprison, pr_list)
663 (void)linux_alloc_prison(pr, NULL);
664 sx_xunlock(&allprison_lock);
665 }
666
667 LIN_SDT_PROBE0(mib, linux_osd_jail_register, return);
668 }
669
670 void
671 linux_osd_jail_deregister(void)
672 {
673
674 LIN_SDT_PROBE0(mib, linux_osd_jail_register, entry);
675
676 if (linux_osd_jail_slot)
677 osd_jail_deregister(linux_osd_jail_slot);
678
679 LIN_SDT_PROBE0(mib, linux_osd_jail_register, return);
680 }
681
682 void
683 linux_get_osname(struct thread *td, char *dst)
684 {
685 struct prison *pr;
686 struct linux_prison *lpr;
687
688 LIN_SDT_PROBE2(mib, linux_get_osname, entry, td, dst);
689
690 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
691 bcopy(lpr->pr_osname, dst, LINUX_MAX_UTSNAME);
692 mtx_unlock(&pr->pr_mtx);
693
694 LIN_SDT_PROBE0(mib, linux_get_osname, return);
695 }
696
697 static int
698 linux_set_osname(struct thread *td, char *osname)
699 {
700 struct prison *pr;
701 struct linux_prison *lpr;
702
703 LIN_SDT_PROBE2(mib, linux_set_osname, entry, td, osname);
704
705 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
706 strlcpy(lpr->pr_osname, osname, LINUX_MAX_UTSNAME);
707 mtx_unlock(&pr->pr_mtx);
708
709 LIN_SDT_PROBE1(mib, linux_set_osname, return, 0);
710 return (0);
711 }
712
713 void
714 linux_get_osrelease(struct thread *td, char *dst)
715 {
716 struct prison *pr;
717 struct linux_prison *lpr;
718
719 LIN_SDT_PROBE2(mib, linux_get_osrelease, entry, td, dst);
720
721 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
722 bcopy(lpr->pr_osrelease, dst, LINUX_MAX_UTSNAME);
723 mtx_unlock(&pr->pr_mtx);
724
725 LIN_SDT_PROBE0(mib, linux_get_osrelease, return);
726 }
727
728 int
729 linux_kernver(struct thread *td)
730 {
731 struct prison *pr;
732 struct linux_prison *lpr;
733 int osrel;
734
735 LIN_SDT_PROBE1(mib, linux_kernver, entry, td);
736
737 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
738 osrel = lpr->pr_osrel;
739 mtx_unlock(&pr->pr_mtx);
740
741 LIN_SDT_PROBE1(mib, linux_kernver, return, osrel);
742 return (osrel);
743 }
744
745 static int
746 linux_set_osrelease(struct thread *td, char *osrelease)
747 {
748 struct prison *pr;
749 struct linux_prison *lpr;
750 int error;
751
752 LIN_SDT_PROBE2(mib, linux_set_osrelease, entry, td, osrelease);
753
754 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
755 error = linux_map_osrel(osrelease, &lpr->pr_osrel);
756 if (error == 0)
757 strlcpy(lpr->pr_osrelease, osrelease, LINUX_MAX_UTSNAME);
758 mtx_unlock(&pr->pr_mtx);
759
760 LIN_SDT_PROBE1(mib, linux_set_osrelease, return, error);
761 return (error);
762 }
763
764 int
765 linux_get_oss_version(struct thread *td)
766 {
767 struct prison *pr;
768 struct linux_prison *lpr;
769 int version;
770
771 LIN_SDT_PROBE1(mib, linux_get_oss_version, entry, td);
772
773 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
774 version = lpr->pr_oss_version;
775 mtx_unlock(&pr->pr_mtx);
776
777 LIN_SDT_PROBE1(mib, linux_get_oss_version, return, version);
778 return (version);
779 }
780
781 static int
782 linux_set_oss_version(struct thread *td, int oss_version)
783 {
784 struct prison *pr;
785 struct linux_prison *lpr;
786
787 LIN_SDT_PROBE2(mib, linux_set_oss_version, entry, td, oss_version);
788
789 lpr = linux_find_prison(td->td_ucred->cr_prison, &pr);
790 lpr->pr_oss_version = oss_version;
791 mtx_unlock(&pr->pr_mtx);
792
793 LIN_SDT_PROBE1(mib, linux_set_oss_version, return, 0);
794 return (0);
795 }
796
797 #if defined(DEBUG) || defined(KTR)
798 /* XXX: can be removed when every ldebug(...) and KTR stuff are removed. */
799
800 u_char linux_debug_map[howmany(LINUX_SYS_MAXSYSCALL, sizeof(u_char))];
801
802 static int
803 linux_debug(int syscall, int toggle, int global)
804 {
805
806 if (global) {
807 char c = toggle ? 0 : 0xff;
808
809 memset(linux_debug_map, c, sizeof(linux_debug_map));
810 return (0);
811 }
812 if (syscall < 0 || syscall >= LINUX_SYS_MAXSYSCALL)
813 return (EINVAL);
814 if (toggle)
815 clrbit(linux_debug_map, syscall);
816 else
817 setbit(linux_debug_map, syscall);
818 return (0);
819 }
820
821 /*
822 * Usage: sysctl linux.debug=<syscall_nr>.<0/1>
823 *
824 * E.g.: sysctl linux.debug=21.0
825 *
826 * As a special case, syscall "all" will apply to all syscalls globally.
827 */
828 #define LINUX_MAX_DEBUGSTR 16
829 static int
830 linux_sysctl_debug(SYSCTL_HANDLER_ARGS)
831 {
832 char value[LINUX_MAX_DEBUGSTR], *p;
833 int error, sysc, toggle;
834 int global = 0;
835
836 value[0] = '\0';
837 error = sysctl_handle_string(oidp, value, LINUX_MAX_DEBUGSTR, req);
838 if (error || req->newptr == NULL)
839 return (error);
840 for (p = value; *p != '\0' && *p != '.'; p++);
841 if (*p == '\0')
842 return (EINVAL);
843 *p++ = '\0';
844 sysc = strtol(value, NULL, 0);
845 toggle = strtol(p, NULL, 0);
846 if (strcmp(value, "all") == 0)
847 global = 1;
848 error = linux_debug(sysc, toggle, global);
849 return (error);
850 }
851
852 SYSCTL_PROC(_compat_linux, OID_AUTO, debug,
853 CTLTYPE_STRING | CTLFLAG_RW,
854 0, 0, linux_sysctl_debug, "A",
855 "Linux debugging control");
856
857 #endif /* DEBUG || KTR */
Cache object: be4173d56f33976844b61a2f3d001066
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