1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999 Poul-Henning Kamp.
5 * Copyright (c) 2009 James Gritton.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef _SYS_JAIL_H_
31 #define _SYS_JAIL_H_
32
33 #ifdef _KERNEL
34 struct jail_v0 {
35 u_int32_t version;
36 char *path;
37 char *hostname;
38 u_int32_t ip_number;
39 };
40 #endif
41
42 struct jail {
43 uint32_t version;
44 char *path;
45 char *hostname;
46 char *jailname;
47 uint32_t ip4s;
48 uint32_t ip6s;
49 struct in_addr *ip4;
50 struct in6_addr *ip6;
51 };
52 #define JAIL_API_VERSION 2
53
54 /*
55 * For all xprison structs, always keep the pr_version an int and
56 * the first variable so userspace can easily distinguish them.
57 */
58 #ifndef _KERNEL
59 struct xprison_v1 {
60 int pr_version;
61 int pr_id;
62 char pr_path[MAXPATHLEN];
63 char pr_host[MAXHOSTNAMELEN];
64 u_int32_t pr_ip;
65 };
66 #endif
67
68 struct xprison {
69 int pr_version;
70 int pr_id;
71 int pr_state;
72 cpusetid_t pr_cpusetid;
73 char pr_path[MAXPATHLEN];
74 char pr_host[MAXHOSTNAMELEN];
75 char pr_name[MAXHOSTNAMELEN];
76 uint32_t pr_ip4s;
77 uint32_t pr_ip6s;
78 #if 0
79 /*
80 * sizeof(xprison) will be malloced + size needed for all
81 * IPv4 and IPv6 addesses. Offsets are based numbers of addresses.
82 */
83 struct in_addr pr_ip4[];
84 struct in6_addr pr_ip6[];
85 #endif
86 };
87 #define XPRISON_VERSION 3
88
89 enum prison_state {
90 PRISON_STATE_INVALID = 0, /* New prison, not ready to be seen */
91 PRISON_STATE_ALIVE, /* Current prison, visible to all */
92 PRISON_STATE_DYING /* Removed but holding resources, */
93 }; /* optionally visible. */
94
95 /*
96 * Flags for jail_set and jail_get.
97 */
98 #define JAIL_CREATE 0x01 /* Create jail if it doesn't exist */
99 #define JAIL_UPDATE 0x02 /* Update parameters of existing jail */
100 #define JAIL_ATTACH 0x04 /* Attach to jail upon creation */
101 #define JAIL_DYING 0x08 /* Allow getting a dying jail */
102 #define JAIL_USE_DESC 0x10 /* Get/set jail in descriptor */
103 #define JAIL_AT_DESC 0x20 /* Find/add jail under descriptor */
104 #define JAIL_GET_DESC 0x40 /* Return a new jail descriptor */
105 #define JAIL_OWN_DESC 0x80 /* Return a new owning jail descriptor */
106 #define JAIL_SET_MASK 0xff /* JAIL_DYING is deprecated/ignored here */
107 #define JAIL_GET_MASK 0xf8
108
109 #define JAIL_SYS_DISABLE 0
110 #define JAIL_SYS_NEW 1
111 #define JAIL_SYS_INHERIT 2
112
113 /*
114 * Names of the static jail parameters registered by the base kernel.
115 * Runtime-registered parameters (allow.mount.*, modules) are only
116 * discoverable via the security.jail.param sysctl tree.
117 */
118 #define JAIL_PARAM_JID "jid"
119 #define JAIL_PARAM_LASTJID "lastjid"
120 #define JAIL_PARAM_NAME "name"
121 #define JAIL_PARAM_PARENT "parent"
122 #define JAIL_PARAM_PATH "path"
123 #define JAIL_PARAM_DESC "desc"
124 #define JAIL_PARAM_ERRMSG "errmsg"
125 #define JAIL_PARAM_PERSIST "persist"
126 #define JAIL_PARAM_NOPERSIST "nopersist"
127 #define JAIL_PARAM_DYING "dying"
128 #define JAIL_PARAM_NODYING "nodying"
129 #define JAIL_PARAM_SECURELEVEL "securelevel"
130 #define JAIL_PARAM_DEVFS_RULESET "devfs_ruleset"
131 #define JAIL_PARAM_ENFORCE_STATFS "enforce_statfs"
132 #define JAIL_PARAM_CHILDREN_CUR "children.cur"
133 #define JAIL_PARAM_CHILDREN_MAX "children.max"
134 #define JAIL_PARAM_CPUSET_ID "cpuset.id"
135 #define JAIL_PARAM_OSRELDATE "osreldate"
136 #define JAIL_PARAM_OSRELEASE "osrelease"
137
138 #define JAIL_PARAM_HOST "host"
139 #define JAIL_PARAM_HOST_HOSTNAME "host.hostname"
140 #define JAIL_PARAM_HOST_DOMAINNAME "host.domainname"
141 #define JAIL_PARAM_HOST_HOSTUUID "host.hostuuid"
142 #define JAIL_PARAM_HOST_HOSTID "host.hostid"
143
144 #if !defined(_KERNEL) || defined(INET)
145 #define JAIL_PARAM_IP4 "ip4"
146 #define JAIL_PARAM_IP4_ADDR "ip4.addr"
147 #define JAIL_PARAM_IP4_SADDRSEL "ip4.saddrsel"
148 #define JAIL_PARAM_IP4_NOSADDRSEL "ip4.nosaddrsel"
149 #endif
150 #if !defined(_KERNEL) || defined(INET6)
151 #define JAIL_PARAM_IP6 "ip6"
152 #define JAIL_PARAM_IP6_ADDR "ip6.addr"
153 #define JAIL_PARAM_IP6_SADDRSEL "ip6.saddrsel"
154 #define JAIL_PARAM_IP6_NOSADDRSEL "ip6.nosaddrsel"
155 #endif
156 #if !defined(_KERNEL) || defined(VIMAGE)
157 #define JAIL_PARAM_VNET "vnet"
158 #endif
159
160 #define JAIL_PARAM_ALLOW_SET_HOSTNAME "allow.set_hostname"
161 #define JAIL_PARAM_ALLOW_NOSET_HOSTNAME "allow.noset_hostname"
162 #define JAIL_PARAM_ALLOW_SYSVIPC "allow.sysvipc"
163 #define JAIL_PARAM_ALLOW_NOSYSVIPC "allow.nosysvipc"
164 #define JAIL_PARAM_ALLOW_RAW_SOCKETS "allow.raw_sockets"
165 #define JAIL_PARAM_ALLOW_NORAW_SOCKETS "allow.noraw_sockets"
166 #define JAIL_PARAM_ALLOW_CHFLAGS "allow.chflags"
167 #define JAIL_PARAM_ALLOW_NOCHFLAGS "allow.nochflags"
168 #define JAIL_PARAM_ALLOW_MOUNT "allow.mount"
169 #define JAIL_PARAM_ALLOW_NOMOUNT "allow.nomount"
170 #define JAIL_PARAM_ALLOW_QUOTAS "allow.quotas"
171 #define JAIL_PARAM_ALLOW_NOQUOTAS "allow.noquotas"
172 #define JAIL_PARAM_ALLOW_SOCKET_AF "allow.socket_af"
173 #define JAIL_PARAM_ALLOW_NOSOCKET_AF "allow.nosocket_af"
174 #define JAIL_PARAM_ALLOW_MLOCK "allow.mlock"
175 #define JAIL_PARAM_ALLOW_NOMLOCK "allow.nomlock"
176 #define JAIL_PARAM_ALLOW_RESERVED_PORTS "allow.reserved_ports"
177 #define JAIL_PARAM_ALLOW_NORESERVED_PORTS \
178 "allow.noreserved_ports"
179 #define JAIL_PARAM_ALLOW_READ_MSGBUF "allow.read_msgbuf"
180 #define JAIL_PARAM_ALLOW_NOREAD_MSGBUF "allow.noread_msgbuf"
181 #define JAIL_PARAM_ALLOW_UNPRIV_DEBUG "allow.unprivileged_proc_debug"
182 #define JAIL_PARAM_ALLOW_NOUNPRIV_DEBUG "allow.nounprivileged_proc_debug"
183 #define JAIL_PARAM_ALLOW_SUSER "allow.suser"
184 #define JAIL_PARAM_ALLOW_NOSUSER "allow.nosuser"
185 #if !defined(_KERNEL) || defined(VIMAGE)
186 #define JAIL_PARAM_ALLOW_NFSD "allow.nfsd"
187 #define JAIL_PARAM_ALLOW_NONFSD "allow.nonfsd"
188 #endif
189 #define JAIL_PARAM_ALLOW_EXTATTR "allow.extattr"
190 #define JAIL_PARAM_ALLOW_NOEXTATTR "allow.noextattr"
191 #define JAIL_PARAM_ALLOW_ADJTIME "allow.adjtime"
192 #define JAIL_PARAM_ALLOW_NOADJTIME "allow.noadjtime"
193 #define JAIL_PARAM_ALLOW_SETTIME "allow.settime"
194 #define JAIL_PARAM_ALLOW_NOSETTIME "allow.nosettime"
195 #define JAIL_PARAM_ALLOW_ROUTING "allow.routing"
196 #define JAIL_PARAM_ALLOW_NOROUTING "allow.norouting"
197 #define JAIL_PARAM_ALLOW_UNPRIV_PARENT_TAMPER \
198 "allow.unprivileged_parent_tampering"
199 #define JAIL_PARAM_ALLOW_NOUNPRIV_PARENT_TAMPER \
200 "allow.nounprivileged_parent_tampering"
201 #if !defined(_KERNEL) || defined(AUDIT)
202 #define JAIL_PARAM_ALLOW_SETAUDIT "allow.setaudit"
203 #define JAIL_PARAM_ALLOW_NOSETAUDIT "allow.nosetaudit"
204 #endif
205
206 #ifndef _KERNEL
207
208 struct iovec;
209
210 __BEGIN_DECLS
211 int jail(struct jail *);
212 int jail_set(struct iovec *, unsigned int, int);
213 int jail_get(struct iovec *, unsigned int, int);
214 int jail_attach(int);
215 int jail_attach_jd(int);
216 int jail_remove(int);
217 int jail_remove_jd(int);
218 __END_DECLS
219
220 #else /* _KERNEL */
221
222 #include <sys/queue.h>
223 #include <sys/sysctl.h>
224 #include <sys/lock.h>
225 #include <sys/mutex.h>
226 #include <sys/_task.h>
227
228 #define JAIL_MAX 999999
229
230 #ifdef MALLOC_DECLARE
231 MALLOC_DECLARE(M_PRISON);
232 #endif
233 #endif /* _KERNEL */
234
235 #if defined(_KERNEL) || defined(_WANT_PRISON)
236
237 #include <sys/osd.h>
238
239 #define HOSTUUIDLEN 64
240 #define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000"
241 #define OSRELEASELEN 32
242
243 #define JAIL_META_PRIVATE "meta"
244 #define JAIL_META_SHARED "env"
245
246 struct jaildesc;
247 struct knlist;
248 struct racct;
249 struct prison_racct;
250
251 typedef enum {
252 PR_INET = 0,
253 PR_INET6 = 1,
254 PR_FAMILY_MAX = 2,
255 } pr_family_t;
256
257 /*
258 * This structure describes a prison. It is pointed to by all struct
259 * ucreds's of the inmates. pr_ref keeps track of them and is used to
260 * delete the structure when the last inmate is dead.
261 *
262 * Lock key:
263 * (a) allprison_lock
264 * (A) allproc_lock
265 * (c) set only during creation before the structure is shared, no mutex
266 * required to read
267 * (m) locked by pr_mtx
268 * (p) locked by pr_mtx, and also at least shared allprison_lock required
269 * to update
270 * (q) locked by both pr_mtx and allprison_lock
271 * (r) atomic via refcount(9), pr_mtx and allprison_lock required to
272 * decrement to zero
273 * (n) read access granted with the network epoch
274 */
275 struct prison {
276 TAILQ_ENTRY(prison) pr_list; /* (a) all prisons */
277 int pr_id; /* (c) prison id */
278 volatile u_int pr_ref; /* (r) refcount */
279 volatile u_int pr_uref; /* (r) user (alive) refcount */
280 unsigned pr_flags; /* (p) PR_* flags */
281 LIST_HEAD(, prison) pr_children; /* (a) list of child jails */
282 LIST_HEAD(, proc) pr_proclist; /* (A) list of jailed processes */
283 LIST_ENTRY(prison) pr_sibling; /* (a) next in parent's list */
284 struct prison *pr_parent; /* (c) containing jail */
285 struct mtx pr_mtx;
286 struct task pr_task; /* (c) destroy task */
287 struct osd pr_osd; /* (p) additional data */
288 struct cpuset *pr_cpuset; /* (p) cpuset */
289 struct vnet *pr_vnet; /* (c) network stack */
290 struct vnode *pr_root; /* (c) vnode to rdir */
291 struct prison_ip *pr_addrs[PR_FAMILY_MAX]; /* (p,n) IPs of jail */
292 struct prison_racct *pr_prison_racct; /* (c) racct jail proxy */
293 struct knlist *pr_klist; /* (m) attached knotes */
294 struct label *pr_label; /* (m) MAC label */
295 LIST_HEAD(, jaildesc) pr_descs; /* (a) attached descriptors */
296 void *pr_sparep;
297 int pr_childcount; /* (a) number of child jails */
298 int pr_childmax; /* (p) maximum child jails */
299 unsigned pr_allow; /* (p) PR_ALLOW_* flags */
300 int pr_securelevel; /* (p) securelevel */
301 int pr_enforce_statfs; /* (p) statfs permission */
302 int pr_devfs_rsnum; /* (p) devfs ruleset */
303 enum prison_state pr_state; /* (q) state in life cycle */
304 volatile int pr_exportcnt; /* (r) count of mount exports */
305 int pr_spare;
306 int pr_osreldate; /* (c) kern.osreldate value */
307 unsigned long pr_hostid; /* (p) jail hostid */
308 char pr_name[MAXHOSTNAMELEN]; /* (p) admin jail name */
309 char pr_path[MAXPATHLEN]; /* (c) chroot path */
310 char pr_hostname[MAXHOSTNAMELEN]; /* (p) jail hostname */
311 char pr_domainname[MAXHOSTNAMELEN]; /* (p) jail domainname */
312 char pr_hostuuid[HOSTUUIDLEN]; /* (p) jail hostuuid */
313 char pr_osrelease[OSRELEASELEN]; /* (c) kern.osrelease value */
314 };
315
316 struct prison_racct {
317 LIST_ENTRY(prison_racct) prr_next;
318 char prr_name[MAXHOSTNAMELEN];
319 u_int prr_refcount;
320 struct racct *prr_racct;
321 };
322 #endif /* _KERNEL || _WANT_PRISON */
323
324 #ifdef _KERNEL
325 /* Flag bits set via options */
326 #define PR_PERSIST 0x00000001 /* Can exist without processes */
327 #define PR_HOST 0x00000002 /* Virtualize hostname et al */
328 #define PR_IP4_USER 0x00000004 /* Restrict IPv4 addresses */
329 #define PR_IP6_USER 0x00000008 /* Restrict IPv6 addresses */
330 #define PR_VNET 0x00000010 /* Virtual network stack */
331 #define PR_IP4_SADDRSEL 0x00000080 /* Do IPv4 src addr sel. or use the */
332 /* primary jail address. */
333 #define PR_IP6_SADDRSEL 0x00000100 /* Do IPv6 src addr sel. or use the */
334 /* primary jail address. */
335
336 /* Internal flag bits */
337 #define PR_REMOVE 0x01000000 /* In process of being removed */
338 #define PR_IP4 0x02000000 /* IPv4 restricted or disabled */
339 /* by this jail or an ancestor */
340 #define PR_IP6 0x04000000 /* IPv6 restricted or disabled */
341 /* by this jail or an ancestor */
342 #define PR_COMPLETE_PROC 0x08000000 /* prison_complete called from */
343 /* prison_proc_free, releases uref */
344
345 /*
346 * Flags for pr_allow
347 * Bits not noted here may be used for dynamic allow.mount.xxxfs.
348 */
349 #define PR_ALLOW_SET_HOSTNAME 0x00000001
350 #define PR_ALLOW_SYSVIPC 0x00000002
351 #define PR_ALLOW_RAW_SOCKETS 0x00000004
352 #define PR_ALLOW_CHFLAGS 0x00000008
353 #define PR_ALLOW_MOUNT 0x00000010
354 #define PR_ALLOW_QUOTAS 0x00000020
355 #define PR_ALLOW_SOCKET_AF 0x00000040
356 #define PR_ALLOW_MLOCK 0x00000080
357 #define PR_ALLOW_READ_MSGBUF 0x00000100
358 #define PR_ALLOW_UNPRIV_DEBUG 0x00000200
359 #define PR_ALLOW_SUSER 0x00000400
360 #define PR_ALLOW_RESERVED_PORTS 0x00008000
361 #define PR_ALLOW_KMEM_ACCESS 0x00010000 /* reserved, not used yet */
362 #define PR_ALLOW_NFSD 0x00020000
363 #define PR_ALLOW_EXTATTR 0x00040000
364 #define PR_ALLOW_ADJTIME 0x00080000
365 #define PR_ALLOW_SETTIME 0x00100000
366 #define PR_ALLOW_ROUTING 0x00200000
367 #define PR_ALLOW_UNPRIV_PARENT_TAMPER 0x00400000
368 #define PR_ALLOW_SETAUDIT 0x00800000
369
370 /*
371 * PR_ALLOW_PRISON0 are the allow flags that we apply by default to prison0,
372 * while PR_ALLOW_ALL_STATIC are all of the allow bits that we have allocated at
373 * build time. PR_ALLOW_ALL_STATIC should contain any bit above that we expect
374 * to be used on the system, while PR_ALLOW_PRISON0 will be some subset of that.
375 */
376 #define PR_ALLOW_ALL_STATIC \
377 (PR_ALLOW_SET_HOSTNAME | PR_ALLOW_SYSVIPC | PR_ALLOW_RAW_SOCKETS | \
378 PR_ALLOW_CHFLAGS | PR_ALLOW_MOUNT | PR_ALLOW_QUOTAS | \
379 PR_ALLOW_SOCKET_AF | PR_ALLOW_MLOCK | PR_ALLOW_READ_MSGBUF | \
380 PR_ALLOW_UNPRIV_DEBUG | PR_ALLOW_SUSER | PR_ALLOW_RESERVED_PORTS | \
381 PR_ALLOW_KMEM_ACCESS | PR_ALLOW_NFSD | PR_ALLOW_EXTATTR | \
382 PR_ALLOW_ADJTIME | PR_ALLOW_SETTIME | PR_ALLOW_ROUTING | \
383 PR_ALLOW_UNPRIV_PARENT_TAMPER | PR_ALLOW_SETAUDIT)
384
385 #define PR_ALLOW_PRISON0 \
386 (PR_ALLOW_ALL_STATIC & ~(PR_ALLOW_UNPRIV_PARENT_TAMPER))
387
388 /*
389 * PR_ALLOW_DIFFERENCES determines which flags are able to be
390 * different between the parent and child jail upon creation.
391 */
392 #define PR_ALLOW_DIFFERENCES \
393 (PR_ALLOW_UNPRIV_DEBUG | PR_ALLOW_UNPRIV_PARENT_TAMPER)
394
395 /*
396 * OSD methods
397 */
398 #define PR_METHOD_CREATE 0
399 #define PR_METHOD_GET 1
400 #define PR_METHOD_SET 2
401 #define PR_METHOD_CHECK 3
402 #define PR_METHOD_ATTACH 4
403 #define PR_METHOD_REMOVE 5
404 #define PR_MAXMETHOD 6
405
406 /*
407 * Lock/unlock a prison.
408 * XXX These exist not so much for general convenience, but to be useable in
409 * the FOREACH_PRISON_DESCENDANT_LOCKED macro which can't handle them in
410 * non-function form as currently defined.
411 */
412 static __inline void
prison_lock(struct prison * pr)413 prison_lock(struct prison *pr)
414 {
415
416 mtx_lock(&pr->pr_mtx);
417 }
418
419 static __inline void
prison_unlock(struct prison * pr)420 prison_unlock(struct prison *pr)
421 {
422
423 mtx_unlock(&pr->pr_mtx);
424 }
425
426 /* Traverse a prison's immediate children. */
427 #define FOREACH_PRISON_CHILD(ppr, cpr) \
428 LIST_FOREACH(cpr, &(ppr)->pr_children, pr_sibling)
429
430 /*
431 * Preorder traversal of all of a prison's descendants.
432 * This ugly loop allows the macro to be followed by a single block
433 * as expected in a looping primitive.
434 */
435 #define FOREACH_PRISON_DESCENDANT(ppr, cpr, descend) \
436 for ((cpr) = (ppr), (descend) = 1; \
437 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
438 ? LIST_FIRST(&(cpr)->pr_children) \
439 : ((cpr) == (ppr) \
440 ? NULL \
441 : (((descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
442 ? LIST_NEXT(cpr, pr_sibling) \
443 : (cpr)->pr_parent))));) \
444 if (!(descend)) \
445 ; \
446 else
447
448 /*
449 * As above, but lock descendants on the way down and unlock on the way up.
450 */
451 #define FOREACH_PRISON_DESCENDANT_LOCKED(ppr, cpr, descend) \
452 for ((cpr) = (ppr), (descend) = 1; \
453 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
454 ? LIST_FIRST(&(cpr)->pr_children) \
455 : ((cpr) == (ppr) \
456 ? NULL \
457 : ((prison_unlock(cpr), \
458 (descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
459 ? LIST_NEXT(cpr, pr_sibling) \
460 : (cpr)->pr_parent))));) \
461 if ((descend) ? (prison_lock(cpr), 0) : 1) \
462 ; \
463 else
464
465 /*
466 * As above, but also keep track of the level descended to.
467 */
468 #define FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(ppr, cpr, descend, level)\
469 for ((cpr) = (ppr), (descend) = 1, (level) = 0; \
470 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
471 ? (level++, LIST_FIRST(&(cpr)->pr_children)) \
472 : ((cpr) == (ppr) \
473 ? NULL \
474 : ((prison_unlock(cpr), \
475 (descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
476 ? LIST_NEXT(cpr, pr_sibling) \
477 : (level--, (cpr)->pr_parent)))));) \
478 if ((descend) ? (prison_lock(cpr), 0) : 1) \
479 ; \
480 else
481
482 /*
483 * Traverse a prison's descendants, visiting both preorder and postorder.
484 */
485 #define FOREACH_PRISON_DESCENDANT_PRE_POST(ppr, cpr, descend) \
486 for ((cpr) = (ppr), (descend) = 1; \
487 ((cpr) = (descend) \
488 ? ((descend) = !LIST_EMPTY(&(cpr)->pr_children)) \
489 ? LIST_FIRST(&(cpr)->pr_children) \
490 : (cpr) \
491 : ((descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
492 ? LIST_NEXT(cpr, pr_sibling) \
493 : cpr->pr_parent) != (ppr);)
494
495 /*
496 * Attributes of the physical system, and the root of the jail tree.
497 */
498 extern struct prison prison0;
499
500 TAILQ_HEAD(prisonlist, prison);
501 extern struct prisonlist allprison;
502 extern struct sx allprison_lock;
503
504 /*
505 * Sysctls to describe jail parameters.
506 */
507 SYSCTL_DECL(_security_jail);
508 SYSCTL_DECL(_security_jail_param);
509
510 #define SYSCTL_JAIL_PARAM_DECL(name) \
511 SYSCTL_DECL(_security_jail_param_##name)
512 #define SYSCTL_JAIL_PARAM(module, param, type, fmt, descr) \
513 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
514 (type) | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_param, fmt, descr)
515 #define SYSCTL_JAIL_PARAM_STRING(module, param, access, len, descr) \
516 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
517 CTLTYPE_STRING | CTLFLAG_MPSAFE | (access), NULL, len, \
518 sysctl_jail_param, "A", descr)
519 #define SYSCTL_JAIL_PARAM_STRUCT(module, param, access, len, fmt, descr) \
520 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
521 CTLTYPE_STRUCT | CTLFLAG_MPSAFE | (access), NULL, len, \
522 sysctl_jail_param, fmt, descr)
523 #define SYSCTL_JAIL_PARAM_NODE(module, descr) \
524 SYSCTL_NODE(_security_jail_param, OID_AUTO, module, CTLFLAG_MPSAFE, \
525 0, descr)
526 #define SYSCTL_JAIL_PARAM_SUBNODE(parent, module, descr) \
527 SYSCTL_NODE(_security_jail_param_##parent, OID_AUTO, module, \
528 CTLFLAG_MPSAFE, 0, descr)
529 #define SYSCTL_JAIL_PARAM_SYS_NODE(module, access, descr) \
530 SYSCTL_JAIL_PARAM_NODE(module, descr); \
531 SYSCTL_JAIL_PARAM(_##module, , CTLTYPE_INT | (access), "E,jailsys", \
532 descr)
533 #define SYSCTL_JAIL_PARAM_SYS_SUBNODE(parent, module, access, descr) \
534 SYSCTL_JAIL_PARAM_SUBNODE(parent, module, descr); \
535 SYSCTL_JAIL_PARAM(_##parent##_##module, , CTLTYPE_INT | (access), \
536 "E,jailsys", descr)
537
538 /*
539 * Kernel support functions for jail().
540 */
541 struct knote;
542 struct mount;
543 struct sockaddr;
544 struct statfs;
545 struct ucred;
546 struct vfsconf;
547
548 /*
549 * Return 1 if the passed credential is in a jail, otherwise 0.
550 */
551 #define jailed(cred) (cred->cr_prison != &prison0)
552
553 bool jailed_without_vnet(struct ucred *);
554 void getcredhostname(struct ucred *, char *, size_t);
555 void getcreddomainname(struct ucred *, char *, size_t);
556 void getcredhostuuid(struct ucred *, char *, size_t);
557 void getcredhostid(struct ucred *, unsigned long *);
558 void getjailname(struct ucred *cred, char *name, size_t len);
559 void prison0_init(void);
560 bool prison_allow(struct ucred *, unsigned);
561 int prison_check(struct ucred *cred1, struct ucred *cred2);
562 bool prison_check_nfsd(struct ucred *cred);
563 bool prison_owns_vnet(struct prison *pr);
564 int prison_canseemount(struct ucred *cred, struct mount *mp);
565 void prison_enforce_statfs(struct ucred *cred, struct mount *mp,
566 struct statfs *sp);
567 struct prison *prison_find(int prid);
568 struct prison *prison_find_child(struct prison *, int);
569 struct prison *prison_find_name(struct prison *, const char *);
570 bool prison_flag(struct ucred *, unsigned);
571 void prison_free(struct prison *pr);
572 void prison_free_locked(struct prison *pr);
573 void prison_hold(struct prison *pr);
574 void prison_hold_locked(struct prison *pr);
575 void prison_proc_hold(struct prison *);
576 void prison_proc_free(struct prison *);
577 void prison_proc_link(struct prison *, struct proc *);
578 void prison_proc_unlink(struct prison *, struct proc *);
579 void prison_proc_iterate(struct prison *, void (*)(struct proc *, void *), void *);
580 void prison_remove(struct prison *);
581 void prison_set_allow(struct ucred *cred, unsigned flag, int enable);
582 bool prison_ischild(struct prison *, struct prison *);
583 bool prison_isalive(const struct prison *);
584 bool prison_isvalid(struct prison *);
585 #if defined(INET) || defined(INET6)
586 int prison_ip_check(const struct prison *, const pr_family_t, const void *);
587 const void *prison_ip_get0(const struct prison *, const pr_family_t);
588 u_int prison_ip_cnt(const struct prison *, const pr_family_t);
589 #endif
590 #ifdef INET
591 bool prison_equal_ip4(struct prison *, struct prison *);
592 int prison_get_ip4(struct ucred *cred, struct in_addr *ia);
593 int prison_local_ip4(struct ucred *cred, struct in_addr *ia);
594 int prison_remote_ip4(struct ucred *cred, struct in_addr *ia);
595 int prison_check_ip4(const struct ucred *, const struct in_addr *);
596 int prison_check_ip4_locked(const struct prison *, const struct in_addr *);
597 bool prison_saddrsel_ip4(struct ucred *, struct in_addr *);
598 int prison_qcmp_v4(const void *, const void *);
599 bool prison_valid_v4(const void *);
600 #endif
601 #ifdef INET6
602 bool prison_equal_ip6(struct prison *, struct prison *);
603 int prison_get_ip6(struct ucred *, struct in6_addr *);
604 int prison_local_ip6(struct ucred *, struct in6_addr *, int);
605 int prison_remote_ip6(struct ucred *, struct in6_addr *);
606 int prison_check_ip6(const struct ucred *, const struct in6_addr *);
607 int prison_check_ip6_locked(const struct prison *, const struct in6_addr *);
608 bool prison_saddrsel_ip6(struct ucred *, struct in6_addr *);
609 int prison_qcmp_v6(const void *, const void *);
610 bool prison_valid_v6(const void *);
611 #endif
612 int prison_check_af(struct ucred *cred, int af);
613 int prison_if(struct ucred *cred, const struct sockaddr *sa);
614 char *prison_name(struct prison *, struct prison *);
615 int prison_priv_check(struct ucred *cred, int priv);
616 int sysctl_jail_param(SYSCTL_HANDLER_ARGS);
617 unsigned prison_add_allow(const char *prefix, const char *name,
618 const char *prefix_descr, const char *descr);
619 void prison_add_vfs(struct vfsconf *vfsp);
620 void prison_racct_foreach(void (*callback)(struct racct *racct,
621 void *arg2, void *arg3), void (*pre)(void), void (*post)(void),
622 void *arg2, void *arg3);
623 struct prison_racct *prison_racct_find(const char *name);
624 void prison_racct_hold(struct prison_racct *prr);
625 void prison_racct_free(struct prison_racct *prr);
626
627 #endif /* _KERNEL */
628 #endif /* !_SYS_JAIL_H_ */
629