1/*- 2 * Copyright (c) 1999 Poul-Henning Kamp. 3 * Copyright (c) 2009 James Gritton. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30#ifndef _SYS_JAIL_H_ 31#define _SYS_JAIL_H_ 32 33#ifdef _KERNEL 34struct jail_v0 { 35 u_int32_t version; 36 char *path; 37 char *hostname; 38 u_int32_t ip_number; 39}; 40#endif 41 42struct 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 59struct 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 68struct 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#define PRISON_STATE_INVALID 0 90#define PRISON_STATE_ALIVE 1 91#define PRISON_STATE_DYING 2 92 93/* 94 * Flags for jail_set and jail_get. 95 */ 96#define JAIL_CREATE 0x01 /* Create jail if it doesn't exist */ 97#define JAIL_UPDATE 0x02 /* Update parameters of existing jail */ 98#define JAIL_ATTACH 0x04 /* Attach to jail upon creation */ 99#define JAIL_DYING 0x08 /* Allow getting a dying jail */ 100#define JAIL_SET_MASK 0x0f 101#define JAIL_GET_MASK 0x08 102 103#define JAIL_SYS_DISABLE 0 104#define JAIL_SYS_NEW 1 105#define JAIL_SYS_INHERIT 2 106 107#ifndef _KERNEL 108 109struct iovec; 110 111int jail(struct jail *); 112int jail_set(struct iovec *, unsigned int, int); 113int jail_get(struct iovec *, unsigned int, int); 114int jail_attach(int); 115int jail_remove(int); 116 117#else /* _KERNEL */ 118 119#include <sys/queue.h> 120#include <sys/sysctl.h> 121#include <sys/lock.h> 122#include <sys/mutex.h> 123#include <sys/_task.h> 124 125#define JAIL_MAX 999999 126 127#ifdef MALLOC_DECLARE 128MALLOC_DECLARE(M_PRISON); 129#endif 130#endif /* _KERNEL */ 131 132#if defined(_KERNEL) || defined(_WANT_PRISON) 133 134#include <sys/osd.h> 135 136#define HOSTUUIDLEN 64 137#define OSRELEASELEN 32 138 139struct racct; 140struct prison_racct; 141 142/* 143 * This structure describes a prison. It is pointed to by all struct 144 * ucreds's of the inmates. pr_ref keeps track of them and is used to 145 * delete the struture when the last inmate is dead. 146 * 147 * Lock key: 148 * (a) allprison_lock 149 * (p) locked by pr_mtx 150 * (c) set only during creation before the structure is shared, no mutex 151 * required to read 152 */ 153struct prison { 154 TAILQ_ENTRY(prison) pr_list; /* (a) all prisons */ 155 int pr_id; /* (c) prison id */ 156 int pr_ref; /* (p) refcount */ 157 int pr_uref; /* (p) user (alive) refcount */ 158 unsigned pr_flags; /* (p) PR_* flags */ 159 LIST_HEAD(, prison) pr_children; /* (a) list of child jails */ 160 LIST_ENTRY(prison) pr_sibling; /* (a) next in parent's list */ 161 struct prison *pr_parent; /* (c) containing jail */ 162 struct mtx pr_mtx; 163 struct task pr_task; /* (c) destroy task */ 164 struct osd pr_osd; /* (p) additional data */ 165 struct cpuset *pr_cpuset; /* (p) cpuset */ 166 struct vnet *pr_vnet; /* (c) network stack */ 167 struct vnode *pr_root; /* (c) vnode to rdir */ 168 int pr_ip4s; /* (p) number of v4 IPs */ 169 int pr_ip6s; /* (p) number of v6 IPs */ 170 struct in_addr *pr_ip4; /* (p) v4 IPs of jail */ 171 struct in6_addr *pr_ip6; /* (p) v6 IPs of jail */ 172 struct prison_racct *pr_prison_racct; /* (c) racct jail proxy */ 173 void *pr_sparep[3]; 174 int pr_childcount; /* (a) number of child jails */ 175 int pr_childmax; /* (p) maximum child jails */ 176 unsigned pr_allow; /* (p) PR_ALLOW_* flags */ 177 int pr_securelevel; /* (p) securelevel */ 178 int pr_enforce_statfs; /* (p) statfs permission */ 179 int pr_devfs_rsnum; /* (p) devfs ruleset */ 180 int pr_spare[3]; 181 int pr_osreldate; /* (c) kern.osreldate value */ 182 unsigned long pr_hostid; /* (p) jail hostid */ 183 char pr_name[MAXHOSTNAMELEN]; /* (p) admin jail name */ 184 char pr_path[MAXPATHLEN]; /* (c) chroot path */ 185 char pr_hostname[MAXHOSTNAMELEN]; /* (p) jail hostname */ 186 char pr_domainname[MAXHOSTNAMELEN]; /* (p) jail domainname */ 187 char pr_hostuuid[HOSTUUIDLEN]; /* (p) jail hostuuid */ 188 char pr_osrelease[OSRELEASELEN]; /* (c) kern.osrelease value */ 189}; 190 191struct prison_racct { 192 LIST_ENTRY(prison_racct) prr_next; 193 char prr_name[MAXHOSTNAMELEN]; 194 u_int prr_refcount; 195 struct racct *prr_racct; 196}; 197#endif /* _KERNEL || _WANT_PRISON */ 198 199#ifdef _KERNEL 200/* Flag bits set via options */ 201#define PR_PERSIST 0x00000001 /* Can exist without processes */ 202#define PR_HOST 0x00000002 /* Virtualize hostname et al */ 203#define PR_IP4_USER 0x00000004 /* Restrict IPv4 addresses */ 204#define PR_IP6_USER 0x00000008 /* Restrict IPv6 addresses */ 205#define PR_VNET 0x00000010 /* Virtual network stack */ 206#define PR_IP4_DISABLE 0x00000020 /* Disable IPv4 */ 207#define PR_IP6_DISABLE 0x00000040 /* Disable IPv6 */ 208#define PR_IP4_SADDRSEL 0x00000080 /* Do IPv4 src addr sel. or use the */ 209 /* primary jail address. */ 210#define PR_IP6_SADDRSEL 0x00000100 /* Do IPv6 src addr sel. or use the */ 211 /* primary jail address. */ 212 213/* Internal flag bits */ 214#define PR_IP4 0x02000000 /* IPv4 restricted or disabled */ 215 /* by this jail or an ancestor */ 216#define PR_IP6 0x04000000 /* IPv6 restricted or disabled */ 217 /* by this jail or an ancestor */ 218 219/* Flags for pr_allow */ 220#define PR_ALLOW_SET_HOSTNAME 0x0001 221#define PR_ALLOW_SYSVIPC 0x0002 222#define PR_ALLOW_RAW_SOCKETS 0x0004 223#define PR_ALLOW_CHFLAGS 0x0008 224#define PR_ALLOW_MOUNT 0x0010 225#define PR_ALLOW_QUOTAS 0x0020 226#define PR_ALLOW_SOCKET_AF 0x0040 227#define PR_ALLOW_MOUNT_DEVFS 0x0080 228#define PR_ALLOW_MOUNT_NULLFS 0x0100 229#define PR_ALLOW_MOUNT_ZFS 0x0200 230#define PR_ALLOW_MOUNT_PROCFS 0x0400 231#define PR_ALLOW_MOUNT_TMPFS 0x0800 232#define PR_ALLOW_MOUNT_FDESCFS 0x1000 233#define PR_ALLOW_MOUNT_LINPROCFS 0x2000 234#define PR_ALLOW_MOUNT_LINSYSFS 0x4000 235#define PR_ALLOW_ALL 0x7fff 236 237/* 238 * OSD methods 239 */ 240#define PR_METHOD_CREATE 0 241#define PR_METHOD_GET 1 242#define PR_METHOD_SET 2 243#define PR_METHOD_CHECK 3 244#define PR_METHOD_ATTACH 4 245#define PR_METHOD_REMOVE 5 246#define PR_MAXMETHOD 6 247 248/* 249 * Lock/unlock a prison. 250 * XXX These exist not so much for general convenience, but to be useable in 251 * the FOREACH_PRISON_DESCENDANT_LOCKED macro which can't handle them in 252 * non-function form as currently defined. 253 */ 254static __inline void 255prison_lock(struct prison *pr) 256{ 257 258 mtx_lock(&pr->pr_mtx); 259} 260 261static __inline void 262prison_unlock(struct prison *pr) 263{ 264 265 mtx_unlock(&pr->pr_mtx); 266} 267 268/* Traverse a prison's immediate children. */ 269#define FOREACH_PRISON_CHILD(ppr, cpr) \ 270 LIST_FOREACH(cpr, &(ppr)->pr_children, pr_sibling) 271 272/* 273 * Preorder traversal of all of a prison's descendants. 274 * This ugly loop allows the macro to be followed by a single block 275 * as expected in a looping primitive. 276 */ 277#define FOREACH_PRISON_DESCENDANT(ppr, cpr, descend) \ 278 for ((cpr) = (ppr), (descend) = 1; \ 279 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \ 280 ? LIST_FIRST(&(cpr)->pr_children) \ 281 : ((cpr) == (ppr) \ 282 ? NULL \ 283 : (((descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \ 284 ? LIST_NEXT(cpr, pr_sibling) \ 285 : (cpr)->pr_parent))));) \ 286 if (!(descend)) \ 287 ; \ 288 else 289 290/* 291 * As above, but lock descendants on the way down and unlock on the way up. 292 */ 293#define FOREACH_PRISON_DESCENDANT_LOCKED(ppr, cpr, descend) \ 294 for ((cpr) = (ppr), (descend) = 1; \ 295 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \ 296 ? LIST_FIRST(&(cpr)->pr_children) \ 297 : ((cpr) == (ppr) \ 298 ? NULL \ 299 : ((prison_unlock(cpr), \ 300 (descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \ 301 ? LIST_NEXT(cpr, pr_sibling) \ 302 : (cpr)->pr_parent))));) \ 303 if ((descend) ? (prison_lock(cpr), 0) : 1) \ 304 ; \ 305 else 306 307/* 308 * As above, but also keep track of the level descended to. 309 */ 310#define FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(ppr, cpr, descend, level)\ 311 for ((cpr) = (ppr), (descend) = 1, (level) = 0; \ 312 ((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \ 313 ? (level++, LIST_FIRST(&(cpr)->pr_children)) \ 314 : ((cpr) == (ppr) \ 315 ? NULL \ 316 : ((prison_unlock(cpr), \ 317 (descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \ 318 ? LIST_NEXT(cpr, pr_sibling) \ 319 : (level--, (cpr)->pr_parent)))));) \ 320 if ((descend) ? (prison_lock(cpr), 0) : 1) \ 321 ; \ 322 else 323 324/* 325 * Attributes of the physical system, and the root of the jail tree. 326 */ 327extern struct prison prison0; 328 329TAILQ_HEAD(prisonlist, prison); 330extern struct prisonlist allprison; 331extern struct sx allprison_lock; 332 333/* 334 * Sysctls to describe jail parameters. 335 */ 336SYSCTL_DECL(_security_jail_param); 337 338#define SYSCTL_JAIL_PARAM(module, param, type, fmt, descr) \ 339 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \ 340 (type) | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_param, fmt, descr) 341#define SYSCTL_JAIL_PARAM_STRING(module, param, access, len, descr) \ 342 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \ 343 CTLTYPE_STRING | CTLFLAG_MPSAFE | (access), NULL, len, \ 344 sysctl_jail_param, "A", descr) 345#define SYSCTL_JAIL_PARAM_STRUCT(module, param, access, len, fmt, descr)\ 346 SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \ 347 CTLTYPE_STRUCT | CTLFLAG_MPSAFE | (access), NULL, len, \ 348 sysctl_jail_param, fmt, descr) 349#define SYSCTL_JAIL_PARAM_NODE(module, descr) \ 350 SYSCTL_NODE(_security_jail_param, OID_AUTO, module, 0, 0, descr) 351#define SYSCTL_JAIL_PARAM_SUBNODE(parent, module, descr) \ 352 SYSCTL_NODE(_security_jail_param_##parent, OID_AUTO, module, 0, 0, descr) 353#define SYSCTL_JAIL_PARAM_SYS_NODE(module, access, descr) \ 354 SYSCTL_JAIL_PARAM_NODE(module, descr); \ 355 SYSCTL_JAIL_PARAM(_##module, , CTLTYPE_INT | (access), "E,jailsys", \ 356 descr) 357 358/* 359 * Kernel support functions for jail(). 360 */ 361struct ucred; 362struct mount; 363struct sockaddr; 364struct statfs; 365int jailed(struct ucred *cred); 366int jailed_without_vnet(struct ucred *); 367void getcredhostname(struct ucred *, char *, size_t); 368void getcreddomainname(struct ucred *, char *, size_t); 369void getcredhostuuid(struct ucred *, char *, size_t); 370void getcredhostid(struct ucred *, unsigned long *); 371void prison0_init(void); 372int prison_allow(struct ucred *, unsigned); 373int prison_check(struct ucred *cred1, struct ucred *cred2); 374int prison_owns_vnet(struct ucred *); 375int prison_canseemount(struct ucred *cred, struct mount *mp); 376void prison_enforce_statfs(struct ucred *cred, struct mount *mp, 377 struct statfs *sp); 378struct prison *prison_find(int prid); 379struct prison *prison_find_child(struct prison *, int); 380struct prison *prison_find_name(struct prison *, const char *); 381int prison_flag(struct ucred *, unsigned); 382void prison_free(struct prison *pr); 383void prison_free_locked(struct prison *pr); 384void prison_hold(struct prison *pr); 385void prison_hold_locked(struct prison *pr); 386void prison_proc_hold(struct prison *); 387void prison_proc_free(struct prison *); 388int prison_ischild(struct prison *, struct prison *); 389int prison_equal_ip4(struct prison *, struct prison *); 390int prison_get_ip4(struct ucred *cred, struct in_addr *ia); 391int prison_local_ip4(struct ucred *cred, struct in_addr *ia); 392int prison_remote_ip4(struct ucred *cred, struct in_addr *ia); 393int prison_check_ip4(struct ucred *cred, struct in_addr *ia); 394int prison_saddrsel_ip4(struct ucred *, struct in_addr *); 395#ifdef INET6 396int prison_equal_ip6(struct prison *, struct prison *); 397int prison_get_ip6(struct ucred *, struct in6_addr *); 398int prison_local_ip6(struct ucred *, struct in6_addr *, int); 399int prison_remote_ip6(struct ucred *, struct in6_addr *); 400int prison_check_ip6(struct ucred *, struct in6_addr *); 401int prison_saddrsel_ip6(struct ucred *, struct in6_addr *); 402#endif 403int prison_check_af(struct ucred *cred, int af); 404int prison_if(struct ucred *cred, struct sockaddr *sa); 405char *prison_name(struct prison *, struct prison *); 406int prison_priv_check(struct ucred *cred, int priv); 407int sysctl_jail_param(SYSCTL_HANDLER_ARGS); 408void prison_racct_foreach(void (*callback)(struct racct *racct, 409 void *arg2, void *arg3), void *arg2, void *arg3); 410struct prison_racct *prison_racct_find(const char *name); 411void prison_racct_hold(struct prison_racct *prr); 412void prison_racct_free(struct prison_racct *prr); 413 414#endif /* _KERNEL */ 415#endif /* !_SYS_JAIL_H_ */ 416