priv: Use PRIV_VFS_CHFLAGS_DEV
[dragonfly.git] / sys / kern / kern_jail.c
CommitLineData
984263bc
MD
1/*
2 * ----------------------------------------------------------------------------
3 * "THE BEER-WARE LICENSE" (Revision 42):
4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
5 * can do whatever you want with this stuff. If we meet some day, and you think
6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
7 * ----------------------------------------------------------------------------
8 *
3e4150ef
VBD
9 */
10/*-
11 * Copyright (c) 2006 Victor Balada Diaz <victor@bsdes.net>
12 * All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
984263bc 22 *
3e4150ef
VBD
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36
37/*
38 * $FreeBSD: src/sys/kern/kern_jail.c,v 1.6.2.3 2001/08/17 01:00:26 rwatson Exp $
7b09fb68 39 * $DragonFly: src/sys/kern/kern_jail.c,v 1.19 2008/05/17 18:20:33 dillon Exp $
984263bc
MD
40 */
41
c0d74973 42#include "opt_inet6.h"
3e4150ef 43
984263bc
MD
44#include <sys/param.h>
45#include <sys/types.h>
46#include <sys/kernel.h>
47#include <sys/systm.h>
48#include <sys/errno.h>
49#include <sys/sysproto.h>
50#include <sys/malloc.h>
b40e316c
JS
51#include <sys/nlookup.h>
52#include <sys/namecache.h>
984263bc 53#include <sys/proc.h>
895c1f85 54#include <sys/priv.h>
984263bc
MD
55#include <sys/jail.h>
56#include <sys/socket.h>
57#include <sys/sysctl.h>
b40e316c 58#include <sys/kern_syscall.h>
984263bc
MD
59#include <net/if.h>
60#include <netinet/in.h>
3e4150ef 61#include <netinet6/in6_var.h>
984263bc 62
b40e316c 63static struct prison *prison_find(int);
bd544276 64static void prison_ipcache_init(struct prison *);
b40e316c 65
984263bc
MD
66MALLOC_DEFINE(M_PRISON, "prison", "Prison structures");
67
68SYSCTL_NODE(, OID_AUTO, jail, CTLFLAG_RW, 0,
69 "Jail rules");
70
71int jail_set_hostname_allowed = 1;
72SYSCTL_INT(_jail, OID_AUTO, set_hostname_allowed, CTLFLAG_RW,
73 &jail_set_hostname_allowed, 0,
74 "Processes in jail can set their hostnames");
75
76int jail_socket_unixiproute_only = 1;
77SYSCTL_INT(_jail, OID_AUTO, socket_unixiproute_only, CTLFLAG_RW,
78 &jail_socket_unixiproute_only, 0,
3e4150ef 79 "Processes in jail are limited to creating UNIX/IPv[46]/route sockets only");
984263bc
MD
80
81int jail_sysvipc_allowed = 0;
82SYSCTL_INT(_jail, OID_AUTO, sysvipc_allowed, CTLFLAG_RW,
83 &jail_sysvipc_allowed, 0,
84 "Processes in jail can use System V IPC primitives");
85
b70df062
MD
86int jail_chflags_allowed = 0;
87SYSCTL_INT(_jail, OID_AUTO, chflags_allowed, CTLFLAG_RW,
88 &jail_chflags_allowed, 0,
89 "Process in jail can set chflags(1)");
90
7b09fb68
MD
91int jail_allow_raw_sockets = 0;
92SYSCTL_INT(_jail, OID_AUTO, allow_raw_sockets, CTLFLAG_RW,
93 &jail_allow_raw_sockets, 0,
94 "Process in jail can create raw sockets");
95
b40e316c
JS
96int lastprid = 0;
97int prisoncount = 0;
98
99LIST_HEAD(prisonlist, prison);
100struct prisonlist allprison = LIST_HEAD_INITIALIZER(&allprison);
101
102static int
103kern_jail_attach(int jid)
104{
105 struct proc *p = curthread->td_proc;
106 struct prison *pr;
107 int error;
108
109 pr = prison_find(jid);
110 if (pr == NULL)
111 return(EINVAL);
112
28623bf9 113 error = kern_chroot(&pr->pr_root);
b40e316c
JS
114 if (error)
115 return(error);
116
117 prison_hold(pr);
118 cratom(&p->p_ucred);
119 p->p_ucred->cr_prison = pr;
120 p->p_flag |= P_JAILED;
121
122 return(0);
123}
124
5825b226
MN
125static int
126assign_prison_id(struct prison *pr)
127{
128 int tryprid;
129 struct prison *tpr;
130
131 tryprid = lastprid + 1;
132 if (tryprid == JAIL_MAX)
133 tryprid = 1;
134next:
135 LIST_FOREACH(tpr, &allprison, pr_list) {
136 if (tpr->pr_id != tryprid)
137 continue;
138 tryprid++;
139 if (tryprid == JAIL_MAX) {
140 return (ERANGE);
141 }
142 goto next;
143 }
144 pr->pr_id = lastprid = tryprid;
145
146 return (0);
147}
148
149static int
150kern_jail(struct prison *pr, struct jail *j)
151{
152 int error;
153 struct nlookupdata nd;
154
155 error = nlookup_init(&nd, j->path, UIO_USERSPACE, NLC_FOLLOW);
156 if (error) {
157 nlookup_done(&nd);
158 return (error);
159 }
160 error = nlookup(&nd);
161 if (error) {
162 nlookup_done(&nd);
163 return (error);
164 }
165 cache_copy(&nd.nl_nch, &pr->pr_root);
166
167 varsymset_init(&pr->pr_varsymset, NULL);
168 prison_ipcache_init(pr);
169
170 error = assign_prison_id(pr);
171 if (error) {
172 varsymset_clean(&pr->pr_varsymset);
173 nlookup_done(&nd);
174 return (error);
175 }
176
177 LIST_INSERT_HEAD(&allprison, pr, pr_list);
178 prisoncount++;
179
180 error = kern_jail_attach(pr->pr_id);
181 if (error) {
182 LIST_REMOVE(pr, pr_list);
183 varsymset_clean(&pr->pr_varsymset);
184 }
185 nlookup_done(&nd);
186 return (error);
187}
188
41c20dac
MD
189/*
190 * jail()
191 *
192 * jail_args(syscallarg(struct jail *) jail)
193 */
984263bc 194int
753fd850 195sys_jail(struct jail_args *uap)
984263bc 196{
dadab5e9 197 struct thread *td = curthread;
5825b226 198 struct prison *pr;
3e4150ef 199 struct jail_ip_storage *jip;
5825b226
MN
200 struct jail j;
201 int error;
202 uint32_t jversion;
203
204 uap->sysmsg_result = -1;
984263bc 205
f938e984 206 error = priv_check(td, PRIV_JAIL_CREATE);
5825b226 207 if (error)
8a506447 208 return (error);
5825b226 209
8a506447 210 error = copyin(uap->jail, &jversion, sizeof(jversion));
5825b226 211 if (error)
8a506447 212 return (error);
5825b226 213
f5b8f0d8 214 pr = kmalloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO);
3e4150ef
VBD
215 SLIST_INIT(&pr->pr_ips);
216
217 switch (jversion) {
218 case 0:
8a506447 219 /* Single IPv4 jails. */
5825b226
MN
220 {
221 struct jail_v0 jv0;
222 struct sockaddr_in ip4addr;
223
8a506447 224 error = copyin(uap->jail, &jv0, sizeof(jv0));
3e4150ef 225 if (error)
5825b226
MN
226 goto out;
227
228 j.path = jv0.path;
229 j.hostname = jv0.hostname;
230
3e4150ef
VBD
231 jip = kmalloc(sizeof(*jip), M_PRISON, M_WAITOK | M_ZERO);
232 ip4addr.sin_family = AF_INET;
233 ip4addr.sin_addr.s_addr = htonl(jv0.ip_number);
234 memcpy(&jip->ip, &ip4addr, sizeof(ip4addr));
235 SLIST_INSERT_HEAD(&pr->pr_ips, jip, entries);
236 break;
5825b226
MN
237 }
238
3e4150ef 239 case 1:
8a506447
MN
240 /*
241 * DragonFly multi noIP/IPv4/IPv6 jails
242 *
243 * NOTE: This version is unsupported by FreeBSD
244 * (which uses version 2 instead).
245 */
246
3e4150ef
VBD
247 error = copyin(uap->jail, &j, sizeof(j));
248 if (error)
5825b226
MN
249 goto out;
250
251 for (int i = 0; i < j.n_ips; i++) {
252 jip = kmalloc(sizeof(*jip), M_PRISON,
3e4150ef 253 M_WAITOK | M_ZERO);
3e4150ef 254 SLIST_INSERT_HEAD(&pr->pr_ips, jip, entries);
5825b226
MN
255 error = copyin(&j.ips[i], &jip->ip,
256 sizeof(struct sockaddr_storage));
257 if (error)
258 goto out;
3e4150ef 259 }
3e4150ef
VBD
260 break;
261 default:
262 error = EINVAL;
5825b226 263 goto out;
3e4150ef 264 }
b40e316c 265
f5b8f0d8 266 error = copyinstr(j.hostname, &pr->pr_host, sizeof(pr->pr_host), 0);
e713d50d 267 if (error)
5825b226 268 goto out;
b40e316c 269
5825b226 270 error = kern_jail(pr, &j);
984263bc 271 if (error)
5825b226 272 goto out;
984263bc 273
61deed49 274 uap->sysmsg_result = pr->pr_id;
984263bc
MD
275 return (0);
276
5825b226 277out:
3e4150ef
VBD
278 /* Delete all ips */
279 while (!SLIST_EMPTY(&pr->pr_ips)) {
280 jip = SLIST_FIRST(&pr->pr_ips);
281 SLIST_REMOVE_HEAD(&pr->pr_ips, entries);
81be0cb8 282 kfree(jip, M_PRISON);
3e4150ef 283 }
81be0cb8 284 kfree(pr, M_PRISON);
5825b226 285 return (error);
b40e316c
JS
286}
287
288/*
289 * int jail_attach(int jid);
290 */
291int
753fd850 292sys_jail_attach(struct jail_attach_args *uap)
b40e316c
JS
293{
294 struct thread *td = curthread;
295 int error;
296
f938e984 297 error = priv_check(td, PRIV_JAIL_ATTACH);
b40e316c
JS
298 if (error)
299 return(error);
300
301 return(kern_jail_attach(uap->jid));
984263bc
MD
302}
303
bd544276
VBD
304static void
305prison_ipcache_init(struct prison *pr)
306{
307 struct jail_ip_storage *jis;
308 struct sockaddr_in *ip4;
309 struct sockaddr_in6 *ip6;
310
311 SLIST_FOREACH(jis, &pr->pr_ips, entries) {
312 switch (jis->ip.ss_family) {
313 case AF_INET:
314 ip4 = (struct sockaddr_in *)&jis->ip;
315 if ((ntohl(ip4->sin_addr.s_addr) >> IN_CLASSA_NSHIFT) ==
316 IN_LOOPBACKNET) {
317 /* loopback address */
318 if (pr->local_ip4 == NULL)
319 pr->local_ip4 = ip4;
320 } else {
321 /* public address */
322 if (pr->nonlocal_ip4 == NULL)
323 pr->nonlocal_ip4 = ip4;
324 }
325 break;
326
327 case AF_INET6:
328 ip6 = (struct sockaddr_in6 *)&jis->ip;
329 if (IN6_IS_ADDR_LOOPBACK(&ip6->sin6_addr)) {
330 /* loopback address */
331 if (pr->local_ip6 == NULL)
332 pr->local_ip6 = ip6;
333 } else {
334 /* public address */
335 if (pr->nonlocal_ip6 == NULL)
336 pr->nonlocal_ip6 = ip6;
337 }
338 break;
339 }
340 }
341}
342
3e4150ef
VBD
343/*
344 * Changes INADDR_LOOPBACK for a valid jail address.
345 * ip is in network byte order.
346 * Returns 1 if the ip is among jail valid ips.
347 * Returns 0 if is not among jail valid ips or
348 * if couldn't replace INADDR_LOOPBACK for a valid
349 * IP.
350 */
984263bc 351int
3e4150ef 352prison_replace_wildcards(struct thread *td, struct sockaddr *ip)
984263bc 353{
3e4150ef
VBD
354 struct sockaddr_in *ip4 = (struct sockaddr_in *)ip;
355 struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *)ip;
41c20dac 356 struct prison *pr;
984263bc 357
dadab5e9 358 if (td->td_proc == NULL)
3e4150ef 359 return (1);
dadab5e9 360 if ((pr = td->td_proc->p_ucred->cr_prison) == NULL)
3e4150ef
VBD
361 return (1);
362
363 if ((ip->sa_family == AF_INET &&
364 ip4->sin_addr.s_addr == htonl(INADDR_ANY)) ||
365 (ip->sa_family == AF_INET6 &&
366 IN6_IS_ADDR_UNSPECIFIED(&ip6->sin6_addr)))
367 return (1);
368 if ((ip->sa_family == AF_INET &&
369 ip4->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) ||
370 (ip->sa_family == AF_INET6 &&
371 IN6_IS_ADDR_LOOPBACK(&ip6->sin6_addr))) {
bd544276
VBD
372 if (!prison_get_local(pr, ip->sa_family, ip) &&
373 !prison_get_nonlocal(pr, ip->sa_family, ip))
3e4150ef 374 return(0);
984263bc 375 else
3e4150ef 376 return(1);
984263bc 377 }
3e4150ef
VBD
378 if (jailed_ip(pr, ip))
379 return(1);
380 return(0);
984263bc
MD
381}
382
3e4150ef
VBD
383int
384prison_remote_ip(struct thread *td, struct sockaddr *ip)
984263bc 385{
3e4150ef
VBD
386 struct sockaddr_in *ip4 = (struct sockaddr_in *)ip;
387 struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *)ip;
41c20dac 388 struct prison *pr;
984263bc 389
dadab5e9 390 if (td == NULL || td->td_proc == NULL)
3e4150ef 391 return(1);
dadab5e9 392 if ((pr = td->td_proc->p_ucred->cr_prison) == NULL)
3e4150ef
VBD
393 return(1);
394 if ((ip->sa_family == AF_INET &&
395 ip4->sin_addr.s_addr == htonl(INADDR_LOOPBACK)) ||
396 (ip->sa_family == AF_INET6 &&
397 IN6_IS_ADDR_LOOPBACK(&ip6->sin6_addr))) {
bd544276
VBD
398 if (!prison_get_local(pr, ip->sa_family, ip) &&
399 !prison_get_nonlocal(pr, ip->sa_family, ip))
3e4150ef 400 return(0);
984263bc 401 else
3e4150ef
VBD
402 return(1);
403 }
404 return(1);
405}
406
407/*
408 * Prison get non loopback ip:
bd544276
VBD
409 * - af is the address family of the ip we want (AF_INET|AF_INET6).
410 * - If ip != NULL, put the first IP address that is not a loopback address
411 * into *ip.
412 *
3e4150ef 413 * ip is in network by order and we don't touch it unless we find a valid ip.
bd544276
VBD
414 * No matter if ip == NULL or not, we return either a valid struct sockaddr *,
415 * or NULL. This struct may not be modified.
3e4150ef 416 */
bd544276
VBD
417struct sockaddr *
418prison_get_nonlocal(struct prison *pr, sa_family_t af, struct sockaddr *ip)
3e4150ef 419{
bd544276
VBD
420 struct sockaddr_in *ip4 = (struct sockaddr_in *)ip;
421 struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *)ip;
3e4150ef 422
3e4150ef 423 /* Check if it is cached */
bd544276
VBD
424 switch(af) {
425 case AF_INET:
426 if (ip4 != NULL && pr->nonlocal_ip4 != NULL)
427 ip4->sin_addr.s_addr = pr->nonlocal_ip4->sin_addr.s_addr;
428 return (struct sockaddr *)pr->nonlocal_ip4;
429
430 case AF_INET6:
431 if (ip6 != NULL && pr->nonlocal_ip6 != NULL)
432 ip6->sin6_addr = pr->nonlocal_ip6->sin6_addr;
433 return (struct sockaddr *)pr->nonlocal_ip6;
3e4150ef 434 }
bd544276
VBD
435
436 /* NOTREACHED */
437 return NULL;
3e4150ef
VBD
438}
439
440/*
441 * Prison get loopback ip.
bd544276
VBD
442 * - af is the address family of the ip we want (AF_INET|AF_INET6).
443 * - If ip != NULL, put the first IP address that is not a loopback address
444 * into *ip.
445 *
446 * ip is in network by order and we don't touch it unless we find a valid ip.
447 * No matter if ip == NULL or not, we return either a valid struct sockaddr *,
448 * or NULL. This struct may not be modified.
3e4150ef 449 */
bd544276
VBD
450struct sockaddr *
451prison_get_local(struct prison *pr, sa_family_t af, struct sockaddr *ip)
3e4150ef 452{
bd544276
VBD
453 struct sockaddr_in *ip4 = (struct sockaddr_in *)ip;
454 struct sockaddr_in6 *ip6 = (struct sockaddr_in6 *)ip;
3e4150ef 455
3e4150ef 456 /* Check if it is cached */
bd544276
VBD
457 switch(af) {
458 case AF_INET:
459 if (ip4 != NULL && pr->local_ip4 != NULL)
460 ip4->sin_addr.s_addr = pr->local_ip4->sin_addr.s_addr;
461 return (struct sockaddr *)pr->local_ip4;
462
463 case AF_INET6:
464 if (ip6 != NULL && pr->local_ip6 != NULL)
465 ip6->sin6_addr = pr->local_ip6->sin6_addr;
466 return (struct sockaddr *)pr->local_ip6;
984263bc 467 }
bd544276
VBD
468
469 /* NOTREACHED */
470 return NULL;
3e4150ef
VBD
471}
472
473/* Check if the IP is among ours, if it is return 1, else 0 */
474int
475jailed_ip(struct prison *pr, struct sockaddr *ip)
476{
477 struct jail_ip_storage *jis;
478 struct sockaddr_in *jip4, *ip4;
479 struct sockaddr_in6 *jip6, *ip6;
480
481 if (pr == NULL)
482 return(0);
483 ip4 = (struct sockaddr_in *)ip;
484 ip6 = (struct sockaddr_in6 *)ip;
485 SLIST_FOREACH(jis, &pr->pr_ips, entries) {
486 switch (ip->sa_family) {
487 case AF_INET:
488 jip4 = (struct sockaddr_in *) &jis->ip;
489 if (jip4->sin_family == AF_INET &&
490 ip4->sin_addr.s_addr == jip4->sin_addr.s_addr)
491 return(1);
492 break;
493 case AF_INET6:
494 jip6 = (struct sockaddr_in6 *) &jis->ip;
495 if (jip6->sin6_family == AF_INET6 &&
496 IN6_ARE_ADDR_EQUAL(&ip6->sin6_addr,
497 &jip6->sin6_addr))
498 return(1);
499 break;
500 }
501 }
502 /* Ip not in list */
503 return(0);
984263bc
MD
504}
505
506int
87de5057 507prison_if(struct ucred *cred, struct sockaddr *sa)
984263bc 508{
41c20dac 509 struct prison *pr;
984263bc 510 struct sockaddr_in *sai = (struct sockaddr_in*) sa;
984263bc 511
87de5057 512 pr = cred->cr_prison;
41c20dac 513
3e4150ef
VBD
514 if (((sai->sin_family != AF_INET) && (sai->sin_family != AF_INET6))
515 && jail_socket_unixiproute_only)
516 return(1);
517 else if ((sai->sin_family != AF_INET) && (sai->sin_family != AF_INET6))
518 return(0);
519 else if (jailed_ip(pr, sa))
520 return(0);
521 return(1);
984263bc 522}
b40e316c
JS
523
524/*
525 * Returns a prison instance, or NULL on failure.
526 */
527static struct prison *
528prison_find(int prid)
529{
530 struct prison *pr;
531
532 LIST_FOREACH(pr, &allprison, pr_list) {
533 if (pr->pr_id == prid)
534 break;
535 }
536 return(pr);
537}
538
539static int
540sysctl_jail_list(SYSCTL_HANDLER_ARGS)
541{
3e4150ef 542 struct jail_ip_storage *jip;
70c97e0d 543#ifdef INET6
3e4150ef 544 struct sockaddr_in6 *jsin6;
70c97e0d 545#endif
3e4150ef 546 struct sockaddr_in *jsin;
b40e316c 547 struct proc *p;
b40e316c 548 struct prison *pr;
3e4150ef 549 unsigned int jlssize, jlsused;
b40e316c 550 int count, error;
3e4150ef
VBD
551 char *jls; /* Jail list */
552 char *oip; /* Output ip */
553 char *fullpath, *freepath;
b40e316c 554
3e4150ef 555 jlsused = 0;
b40e316c
JS
556 p = curthread->td_proc;
557
558 if (jailed(p->p_ucred))
559 return (0);
560retry:
561 count = prisoncount;
562
563 if (count == 0)
564 return(0);
565
3e4150ef
VBD
566 jlssize = (count * 1024);
567 jls = kmalloc(jlssize + 1, M_TEMP, M_WAITOK | M_ZERO);
b40e316c 568 if (count < prisoncount) {
3e4150ef 569 kfree(jls, M_TEMP);
b40e316c
JS
570 goto retry;
571 }
572 count = prisoncount;
e713d50d 573
b40e316c 574 LIST_FOREACH(pr, &allprison, pr_list) {
28623bf9 575 error = cache_fullpath(p, &pr->pr_root, &fullpath, &freepath);
70c97e0d
MD
576 if (error)
577 continue;
578 if (jlsused && jlsused < jlssize)
579 jls[jlsused++] = '\n';
580 count = ksnprintf(jls + jlsused, (jlssize - jlsused),
581 "%d %s %s",
582 pr->pr_id, pr->pr_host, fullpath);
3e4150ef
VBD
583 kfree(freepath, M_TEMP);
584 if (count < 0)
585 goto end;
586 jlsused += count;
587
588 /* Copy the IPS */
589 SLIST_FOREACH(jip, &pr->pr_ips, entries) {
590 jsin = (struct sockaddr_in *)&jip->ip;
3e4150ef 591
70c97e0d
MD
592 switch(jsin->sin_family) {
593 case AF_INET:
3e4150ef 594 oip = inet_ntoa(jsin->sin_addr);
70c97e0d
MD
595 break;
596#ifdef INET6
597 case AF_INET6:
598 jsin6 = (struct sockaddr_in6 *)&jip->ip;
3e4150ef 599 oip = ip6_sprintf(&jsin6->sin6_addr);
70c97e0d
MD
600 break;
601#endif
602 default:
603 oip = "?family?";
604 break;
605 }
3e4150ef 606
70c97e0d 607 if ((jlssize - jlsused) < (strlen(oip) + 1)) {
3e4150ef
VBD
608 error = ERANGE;
609 goto end;
610 }
70c97e0d
MD
611 count = ksnprintf(jls + jlsused, (jlssize - jlsused),
612 " %s", oip);
613 if (count < 0)
614 goto end;
615 jlsused += count;
b40e316c 616 }
b40e316c
JS
617 }
618
3e4150ef
VBD
619 /*
620 * The format is:
621 * pr_id <SPC> hostname1 <SPC> PATH1 <SPC> IP1 <SPC> IP2\npr_id...
622 */
623 error = SYSCTL_OUT(req, jls, jlsused);
624end:
625 kfree(jls, M_TEMP);
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626 return(error);
627}
628
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VBD
629SYSCTL_OID(_jail, OID_AUTO, list, CTLTYPE_STRING | CTLFLAG_RD, NULL, 0,
630 sysctl_jail_list, "A", "List of active jails");
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631
632void
633prison_hold(struct prison *pr)
634{
635 pr->pr_ref++;
636}
637
638void
639prison_free(struct prison *pr)
640{
3e4150ef 641 struct jail_ip_storage *jls;
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642 KKASSERT(pr->pr_ref >= 1);
643
644 if (--pr->pr_ref > 0)
645 return;
646
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647 /* Delete all ips */
648 while (!SLIST_EMPTY(&pr->pr_ips)) {
649 jls = SLIST_FIRST(&pr->pr_ips);
650 SLIST_REMOVE_HEAD(&pr->pr_ips, entries);
81be0cb8 651 kfree(jls, M_PRISON);
3e4150ef 652 }
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653 LIST_REMOVE(pr, pr_list);
654 prisoncount--;
655
656 if (pr->pr_linux != NULL)
efda3bd0 657 kfree(pr->pr_linux, M_PRISON);
b40e316c 658 varsymset_clean(&pr->pr_varsymset);
28623bf9 659 cache_drop(&pr->pr_root);
efda3bd0 660 kfree(pr, M_PRISON);
b40e316c 661}
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662
663/*
664 * Check if permisson for a specific privilege is granted within jail.
665 */
666int
667prison_priv_check(struct ucred *cred, int priv)
668{
669 if (!jailed(cred))
670 return (0);
671
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672 switch (priv) {
673 case PRIV_CRED_SETUID:
674 case PRIV_CRED_SETEUID:
675 case PRIV_CRED_SETGID:
676 case PRIV_CRED_SETEGID:
677 case PRIV_CRED_SETGROUPS:
678 case PRIV_CRED_SETREUID:
679 case PRIV_CRED_SETREGID:
680 case PRIV_CRED_SETRESUID:
681 case PRIV_CRED_SETRESGID:
682
683 case PRIV_VFS_SYSFLAGS:
684 case PRIV_VFS_CHOWN:
47fac363 685 case PRIV_VFS_CHMOD:
3a591c90 686 case PRIV_VFS_CHROOT:
f6df0641 687 case PRIV_VFS_LINK:
6dc79895 688 case PRIV_VFS_CHFLAGS_DEV:
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689 case PRIV_VFS_MKNOD_BAD:
690 case PRIV_VFS_MKNOD_WHT:
691 case PRIV_VFS_MKNOD_DIR:
692
693 case PRIV_PROC_SETRLIMIT:
694 case PRIV_PROC_SETLOGIN:
695
696 case PRIV_SYSCTL_WRITEJAIL:
697
698 return (0);
699
700 default:
701
702 return (EPERM);
703 }
cd554aa4 704}