1 /*- 2 * Copyright (c) 1999 Poul-Henning Kamp. 3 * Copyright (c) 2008 Bjoern A. Zeeb. 4 * Copyright (c) 2009 James Gritton. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_compat.h" 33 #include "opt_ddb.h" 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/sysproto.h> 43 #include <sys/malloc.h> 44 #include <sys/osd.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/taskqueue.h> 48 #include <sys/fcntl.h> 49 #include <sys/jail.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/racct.h> 53 #include <sys/refcount.h> 54 #include <sys/sx.h> 55 #include <sys/sysent.h> 56 #include <sys/namei.h> 57 #include <sys/mount.h> 58 #include <sys/queue.h> 59 #include <sys/socket.h> 60 #include <sys/syscallsubr.h> 61 #include <sys/sysctl.h> 62 #include <sys/vnode.h> 63 64 #include <net/if.h> 65 #include <net/vnet.h> 66 67 #include <netinet/in.h> 68 69 #ifdef DDB 70 #include <ddb/ddb.h> 71 #ifdef INET6 72 #include <netinet6/in6_var.h> 73 #endif /* INET6 */ 74 #endif /* DDB */ 75 76 #include <security/mac/mac_framework.h> 77 78 #define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" 79 80 MALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 81 static MALLOC_DEFINE(M_PRISON_RACCT, "prison_racct", "Prison racct structures"); 82 83 /* Keep struct prison prison0 and some code in kern_jail_set() readable. */ 84 #ifdef INET 85 #ifdef INET6 86 #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL 87 #else 88 #define _PR_IP_SADDRSEL PR_IP4_SADDRSEL 89 #endif 90 #else /* !INET */ 91 #ifdef INET6 92 #define _PR_IP_SADDRSEL PR_IP6_SADDRSEL 93 #else 94 #define _PR_IP_SADDRSEL 0 95 #endif 96 #endif 97 98 /* prison0 describes what is "real" about the system. */ 99 struct prison prison0 = { 100 .pr_id = 0, 101 .pr_name = "0", 102 .pr_ref = 1, 103 .pr_uref = 1, 104 .pr_path = "/", 105 .pr_securelevel = -1, 106 .pr_devfs_rsnum = 0, 107 .pr_childmax = JAIL_MAX, 108 .pr_hostuuid = DEFAULT_HOSTUUID, 109 .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), 110 #ifdef VIMAGE 111 .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, 112 #else 113 .pr_flags = PR_HOST|_PR_IP_SADDRSEL, 114 #endif 115 .pr_allow = PR_ALLOW_ALL, 116 }; 117 MTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); 118 119 /* allprison, allprison_racct and lastprid are protected by allprison_lock. */ 120 struct sx allprison_lock; 121 SX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); 122 struct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); 123 LIST_HEAD(, prison_racct) allprison_racct; 124 int lastprid = 0; 125 126 static int do_jail_attach(struct thread *td, struct prison *pr); 127 static void prison_complete(void *context, int pending); 128 static void prison_deref(struct prison *pr, int flags); 129 static char *prison_path(struct prison *pr1, struct prison *pr2); 130 static void prison_remove_one(struct prison *pr); 131 #ifdef RACCT 132 static void prison_racct_attach(struct prison *pr); 133 static void prison_racct_detach(struct prison *pr); 134 #endif 135 #ifdef INET 136 static int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 137 static int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 138 #endif 139 #ifdef INET6 140 static int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 141 static int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 142 #endif 143 144 /* Flags for prison_deref */ 145 #define PD_DEREF 0x01 146 #define PD_DEUREF 0x02 147 #define PD_LOCKED 0x04 148 #define PD_LIST_SLOCKED 0x08 149 #define PD_LIST_XLOCKED 0x10 150 151 /* 152 * Parameter names corresponding to PR_* flag values. Size values are for kvm 153 * as we cannot figure out the size of a sparse array, or an array without a 154 * terminating entry. 155 */ 156 static char *pr_flag_names[] = { 157 [0] = "persist", 158 #ifdef INET 159 [7] = "ip4.saddrsel", 160 #endif 161 #ifdef INET6 162 [8] = "ip6.saddrsel", 163 #endif 164 }; 165 const size_t pr_flag_names_size = sizeof(pr_flag_names); 166 167 static char *pr_flag_nonames[] = { 168 [0] = "nopersist", 169 #ifdef INET 170 [7] = "ip4.nosaddrsel", 171 #endif 172 #ifdef INET6 173 [8] = "ip6.nosaddrsel", 174 #endif 175 }; 176 const size_t pr_flag_nonames_size = sizeof(pr_flag_nonames); 177 178 struct jailsys_flags { 179 const char *name; 180 unsigned disable; 181 unsigned new; 182 } pr_flag_jailsys[] = { 183 { "host", 0, PR_HOST }, 184 #ifdef VIMAGE 185 { "vnet", 0, PR_VNET }, 186 #endif 187 #ifdef INET 188 { "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER }, 189 #endif 190 #ifdef INET6 191 { "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER }, 192 #endif 193 }; 194 const size_t pr_flag_jailsys_size = sizeof(pr_flag_jailsys); 195 196 static char *pr_allow_names[] = { 197 "allow.set_hostname", 198 "allow.sysvipc", 199 "allow.raw_sockets", 200 "allow.chflags", 201 "allow.mount", 202 "allow.quotas", 203 "allow.socket_af", 204 }; 205 const size_t pr_allow_names_size = sizeof(pr_allow_names); 206 207 static char *pr_allow_nonames[] = { 208 "allow.noset_hostname", 209 "allow.nosysvipc", 210 "allow.noraw_sockets", 211 "allow.nochflags", 212 "allow.nomount", 213 "allow.noquotas", 214 "allow.nosocket_af", 215 }; 216 const size_t pr_allow_nonames_size = sizeof(pr_allow_nonames); 217 218 #define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 219 #define JAIL_DEFAULT_ENFORCE_STATFS 2 220 #define JAIL_DEFAULT_DEVFS_RSNUM -1 221 static unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 222 static int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 223 static int jail_default_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM; 224 #if defined(INET) || defined(INET6) 225 static unsigned jail_max_af_ips = 255; 226 #endif 227 228 #ifdef INET 229 static int 230 qcmp_v4(const void *ip1, const void *ip2) 231 { 232 in_addr_t iaa, iab; 233 234 /* 235 * We need to compare in HBO here to get the list sorted as expected 236 * by the result of the code. Sorting NBO addresses gives you 237 * interesting results. If you do not understand, do not try. 238 */ 239 iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 240 iab = ntohl(((const struct in_addr *)ip2)->s_addr); 241 242 /* 243 * Do not simply return the difference of the two numbers, the int is 244 * not wide enough. 245 */ 246 if (iaa > iab) 247 return (1); 248 else if (iaa < iab) 249 return (-1); 250 else 251 return (0); 252 } 253 #endif 254 255 #ifdef INET6 256 static int 257 qcmp_v6(const void *ip1, const void *ip2) 258 { 259 const struct in6_addr *ia6a, *ia6b; 260 int i, rc; 261 262 ia6a = (const struct in6_addr *)ip1; 263 ia6b = (const struct in6_addr *)ip2; 264 265 rc = 0; 266 for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 267 if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 268 rc = 1; 269 else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 270 rc = -1; 271 } 272 return (rc); 273 } 274 #endif 275 276 /* 277 * struct jail_args { 278 * struct jail *jail; 279 * }; 280 */ 281 int 282 sys_jail(struct thread *td, struct jail_args *uap) 283 { 284 uint32_t version; 285 int error; 286 struct jail j; 287 288 error = copyin(uap->jail, &version, sizeof(uint32_t)); 289 if (error) 290 return (error); 291 292 switch (version) { 293 case 0: 294 { 295 struct jail_v0 j0; 296 297 /* FreeBSD single IPv4 jails. */ 298 bzero(&j, sizeof(struct jail)); 299 error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 300 if (error) 301 return (error); 302 j.version = j0.version; 303 j.path = j0.path; 304 j.hostname = j0.hostname; 305 j.ip4s = j0.ip_number; 306 break; 307 } 308 309 case 1: 310 /* 311 * Version 1 was used by multi-IPv4 jail implementations 312 * that never made it into the official kernel. 313 */ 314 return (EINVAL); 315 316 case 2: /* JAIL_API_VERSION */ 317 /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 318 error = copyin(uap->jail, &j, sizeof(struct jail)); 319 if (error) 320 return (error); 321 break; 322 323 default: 324 /* Sci-Fi jails are not supported, sorry. */ 325 return (EINVAL); 326 } 327 return (kern_jail(td, &j)); 328 } 329 330 int 331 kern_jail(struct thread *td, struct jail *j) 332 { 333 struct iovec optiov[2 * (4 334 + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 335 #ifdef INET 336 + 1 337 #endif 338 #ifdef INET6 339 + 1 340 #endif 341 )]; 342 struct uio opt; 343 char *u_path, *u_hostname, *u_name; 344 #ifdef INET 345 uint32_t ip4s; 346 struct in_addr *u_ip4; 347 #endif 348 #ifdef INET6 349 struct in6_addr *u_ip6; 350 #endif 351 size_t tmplen; 352 int error, enforce_statfs, fi; 353 354 bzero(&optiov, sizeof(optiov)); 355 opt.uio_iov = optiov; 356 opt.uio_iovcnt = 0; 357 opt.uio_offset = -1; 358 opt.uio_resid = -1; 359 opt.uio_segflg = UIO_SYSSPACE; 360 opt.uio_rw = UIO_READ; 361 opt.uio_td = td; 362 363 /* Set permissions for top-level jails from sysctls. */ 364 if (!jailed(td->td_ucred)) { 365 for (fi = 0; fi < sizeof(pr_allow_names) / 366 sizeof(pr_allow_names[0]); fi++) { 367 optiov[opt.uio_iovcnt].iov_base = 368 (jail_default_allow & (1 << fi)) 369 ? pr_allow_names[fi] : pr_allow_nonames[fi]; 370 optiov[opt.uio_iovcnt].iov_len = 371 strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 372 opt.uio_iovcnt += 2; 373 } 374 optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 375 optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 376 opt.uio_iovcnt++; 377 enforce_statfs = jail_default_enforce_statfs; 378 optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 379 optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 380 opt.uio_iovcnt++; 381 } 382 383 tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 384 #ifdef INET 385 ip4s = (j->version == 0) ? 1 : j->ip4s; 386 if (ip4s > jail_max_af_ips) 387 return (EINVAL); 388 tmplen += ip4s * sizeof(struct in_addr); 389 #else 390 if (j->ip4s > 0) 391 return (EINVAL); 392 #endif 393 #ifdef INET6 394 if (j->ip6s > jail_max_af_ips) 395 return (EINVAL); 396 tmplen += j->ip6s * sizeof(struct in6_addr); 397 #else 398 if (j->ip6s > 0) 399 return (EINVAL); 400 #endif 401 u_path = malloc(tmplen, M_TEMP, M_WAITOK); 402 u_hostname = u_path + MAXPATHLEN; 403 u_name = u_hostname + MAXHOSTNAMELEN; 404 #ifdef INET 405 u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 406 #endif 407 #ifdef INET6 408 #ifdef INET 409 u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 410 #else 411 u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 412 #endif 413 #endif 414 optiov[opt.uio_iovcnt].iov_base = "path"; 415 optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 416 opt.uio_iovcnt++; 417 optiov[opt.uio_iovcnt].iov_base = u_path; 418 error = copyinstr(j->path, u_path, MAXPATHLEN, 419 &optiov[opt.uio_iovcnt].iov_len); 420 if (error) { 421 free(u_path, M_TEMP); 422 return (error); 423 } 424 opt.uio_iovcnt++; 425 optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 426 optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 427 opt.uio_iovcnt++; 428 optiov[opt.uio_iovcnt].iov_base = u_hostname; 429 error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 430 &optiov[opt.uio_iovcnt].iov_len); 431 if (error) { 432 free(u_path, M_TEMP); 433 return (error); 434 } 435 opt.uio_iovcnt++; 436 if (j->jailname != NULL) { 437 optiov[opt.uio_iovcnt].iov_base = "name"; 438 optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 439 opt.uio_iovcnt++; 440 optiov[opt.uio_iovcnt].iov_base = u_name; 441 error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 442 &optiov[opt.uio_iovcnt].iov_len); 443 if (error) { 444 free(u_path, M_TEMP); 445 return (error); 446 } 447 opt.uio_iovcnt++; 448 } 449 #ifdef INET 450 optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 451 optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 452 opt.uio_iovcnt++; 453 optiov[opt.uio_iovcnt].iov_base = u_ip4; 454 optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 455 if (j->version == 0) 456 u_ip4->s_addr = j->ip4s; 457 else { 458 error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 459 if (error) { 460 free(u_path, M_TEMP); 461 return (error); 462 } 463 } 464 opt.uio_iovcnt++; 465 #endif 466 #ifdef INET6 467 optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 468 optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 469 opt.uio_iovcnt++; 470 optiov[opt.uio_iovcnt].iov_base = u_ip6; 471 optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 472 error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 473 if (error) { 474 free(u_path, M_TEMP); 475 return (error); 476 } 477 opt.uio_iovcnt++; 478 #endif 479 KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 480 ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 481 error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 482 free(u_path, M_TEMP); 483 return (error); 484 } 485 486 487 /* 488 * struct jail_set_args { 489 * struct iovec *iovp; 490 * unsigned int iovcnt; 491 * int flags; 492 * }; 493 */ 494 int 495 sys_jail_set(struct thread *td, struct jail_set_args *uap) 496 { 497 struct uio *auio; 498 int error; 499 500 /* Check that we have an even number of iovecs. */ 501 if (uap->iovcnt & 1) 502 return (EINVAL); 503 504 error = copyinuio(uap->iovp, uap->iovcnt, &auio); 505 if (error) 506 return (error); 507 error = kern_jail_set(td, auio, uap->flags); 508 free(auio, M_IOV); 509 return (error); 510 } 511 512 int 513 kern_jail_set(struct thread *td, struct uio *optuio, int flags) 514 { 515 struct nameidata nd; 516 #ifdef INET 517 struct in_addr *ip4; 518 #endif 519 #ifdef INET6 520 struct in6_addr *ip6; 521 #endif 522 struct vfsopt *opt; 523 struct vfsoptlist *opts; 524 struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 525 struct vnode *root; 526 char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 527 char *g_path; 528 #if defined(INET) || defined(INET6) 529 struct prison *tppr; 530 void *op; 531 #endif 532 unsigned long hid; 533 size_t namelen, onamelen; 534 int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 535 int gotchildmax, gotenforce, gothid, gotrsnum, gotslevel; 536 int fi, jid, jsys, len, level; 537 int childmax, rsnum, slevel, vfslocked; 538 int fullpath_disabled; 539 #if defined(INET) || defined(INET6) 540 int ii, ij; 541 #endif 542 #ifdef INET 543 int ip4s, redo_ip4; 544 #endif 545 #ifdef INET6 546 int ip6s, redo_ip6; 547 #endif 548 uint64_t pr_allow, ch_allow, pr_flags, ch_flags; 549 unsigned tallow; 550 char numbuf[12]; 551 552 error = priv_check(td, PRIV_JAIL_SET); 553 if (!error && (flags & JAIL_ATTACH)) 554 error = priv_check(td, PRIV_JAIL_ATTACH); 555 if (error) 556 return (error); 557 mypr = ppr = td->td_ucred->cr_prison; 558 if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 559 return (EPERM); 560 if (flags & ~JAIL_SET_MASK) 561 return (EINVAL); 562 563 /* 564 * Check all the parameters before committing to anything. Not all 565 * errors can be caught early, but we may as well try. Also, this 566 * takes care of some expensive stuff (path lookup) before getting 567 * the allprison lock. 568 * 569 * XXX Jails are not filesystems, and jail parameters are not mount 570 * options. But it makes more sense to re-use the vfsopt code 571 * than duplicate it under a different name. 572 */ 573 error = vfs_buildopts(optuio, &opts); 574 if (error) 575 return (error); 576 #ifdef INET 577 ip4 = NULL; 578 #endif 579 #ifdef INET6 580 ip6 = NULL; 581 #endif 582 g_path = NULL; 583 584 error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 585 if (error == ENOENT) 586 jid = 0; 587 else if (error != 0) 588 goto done_free; 589 590 error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 591 if (error == ENOENT) 592 gotslevel = 0; 593 else if (error != 0) 594 goto done_free; 595 else 596 gotslevel = 1; 597 598 error = 599 vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 600 if (error == ENOENT) 601 gotchildmax = 0; 602 else if (error != 0) 603 goto done_free; 604 else 605 gotchildmax = 1; 606 607 error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 608 if (error == ENOENT) 609 gotenforce = 0; 610 else if (error != 0) 611 goto done_free; 612 else if (enforce < 0 || enforce > 2) { 613 error = EINVAL; 614 goto done_free; 615 } else 616 gotenforce = 1; 617 618 error = vfs_copyopt(opts, "devfs_ruleset", &rsnum, sizeof(rsnum)); 619 if (error == ENOENT) 620 gotrsnum = 0; 621 else if (error != 0) 622 goto done_free; 623 else 624 gotrsnum = 1; 625 626 pr_flags = ch_flags = 0; 627 for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 628 fi++) { 629 if (pr_flag_names[fi] == NULL) 630 continue; 631 vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 632 vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 633 } 634 ch_flags |= pr_flags; 635 for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 636 fi++) { 637 error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 638 sizeof(jsys)); 639 if (error == ENOENT) 640 continue; 641 if (error != 0) 642 goto done_free; 643 switch (jsys) { 644 case JAIL_SYS_DISABLE: 645 if (!pr_flag_jailsys[fi].disable) { 646 error = EINVAL; 647 goto done_free; 648 } 649 pr_flags |= pr_flag_jailsys[fi].disable; 650 break; 651 case JAIL_SYS_NEW: 652 pr_flags |= pr_flag_jailsys[fi].new; 653 break; 654 case JAIL_SYS_INHERIT: 655 break; 656 default: 657 error = EINVAL; 658 goto done_free; 659 } 660 ch_flags |= 661 pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 662 } 663 if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 664 && !(pr_flags & PR_PERSIST)) { 665 error = EINVAL; 666 vfs_opterror(opts, "new jail must persist or attach"); 667 goto done_errmsg; 668 } 669 #ifdef VIMAGE 670 if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 671 error = EINVAL; 672 vfs_opterror(opts, "vnet cannot be changed after creation"); 673 goto done_errmsg; 674 } 675 #endif 676 #ifdef INET 677 if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 678 error = EINVAL; 679 vfs_opterror(opts, "ip4 cannot be changed after creation"); 680 goto done_errmsg; 681 } 682 #endif 683 #ifdef INET6 684 if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 685 error = EINVAL; 686 vfs_opterror(opts, "ip6 cannot be changed after creation"); 687 goto done_errmsg; 688 } 689 #endif 690 691 pr_allow = ch_allow = 0; 692 for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 693 fi++) { 694 vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 695 vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 696 } 697 ch_allow |= pr_allow; 698 699 error = vfs_getopt(opts, "name", (void **)&name, &len); 700 if (error == ENOENT) 701 name = NULL; 702 else if (error != 0) 703 goto done_free; 704 else { 705 if (len == 0 || name[len - 1] != '\0') { 706 error = EINVAL; 707 goto done_free; 708 } 709 if (len > MAXHOSTNAMELEN) { 710 error = ENAMETOOLONG; 711 goto done_free; 712 } 713 } 714 715 error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 716 if (error == ENOENT) 717 host = NULL; 718 else if (error != 0) 719 goto done_free; 720 else { 721 ch_flags |= PR_HOST; 722 pr_flags |= PR_HOST; 723 if (len == 0 || host[len - 1] != '\0') { 724 error = EINVAL; 725 goto done_free; 726 } 727 if (len > MAXHOSTNAMELEN) { 728 error = ENAMETOOLONG; 729 goto done_free; 730 } 731 } 732 733 error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 734 if (error == ENOENT) 735 domain = NULL; 736 else if (error != 0) 737 goto done_free; 738 else { 739 ch_flags |= PR_HOST; 740 pr_flags |= PR_HOST; 741 if (len == 0 || domain[len - 1] != '\0') { 742 error = EINVAL; 743 goto done_free; 744 } 745 if (len > MAXHOSTNAMELEN) { 746 error = ENAMETOOLONG; 747 goto done_free; 748 } 749 } 750 751 error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 752 if (error == ENOENT) 753 uuid = NULL; 754 else if (error != 0) 755 goto done_free; 756 else { 757 ch_flags |= PR_HOST; 758 pr_flags |= PR_HOST; 759 if (len == 0 || uuid[len - 1] != '\0') { 760 error = EINVAL; 761 goto done_free; 762 } 763 if (len > HOSTUUIDLEN) { 764 error = ENAMETOOLONG; 765 goto done_free; 766 } 767 } 768 769 #ifdef COMPAT_FREEBSD32 770 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 771 uint32_t hid32; 772 773 error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 774 hid = hid32; 775 } else 776 #endif 777 error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 778 if (error == ENOENT) 779 gothid = 0; 780 else if (error != 0) 781 goto done_free; 782 else { 783 gothid = 1; 784 ch_flags |= PR_HOST; 785 pr_flags |= PR_HOST; 786 } 787 788 #ifdef INET 789 error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 790 if (error == ENOENT) 791 ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1; 792 else if (error != 0) 793 goto done_free; 794 else if (ip4s & (sizeof(*ip4) - 1)) { 795 error = EINVAL; 796 goto done_free; 797 } else { 798 ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 799 if (ip4s == 0) 800 pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 801 else { 802 pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 803 ip4s /= sizeof(*ip4); 804 if (ip4s > jail_max_af_ips) { 805 error = EINVAL; 806 vfs_opterror(opts, "too many IPv4 addresses"); 807 goto done_errmsg; 808 } 809 ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 810 bcopy(op, ip4, ip4s * sizeof(*ip4)); 811 /* 812 * IP addresses are all sorted but ip[0] to preserve 813 * the primary IP address as given from userland. 814 * This special IP is used for unbound outgoing 815 * connections as well for "loopback" traffic in case 816 * source address selection cannot find any more fitting 817 * address to connect from. 818 */ 819 if (ip4s > 1) 820 qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 821 /* 822 * Check for duplicate addresses and do some simple 823 * zero and broadcast checks. If users give other bogus 824 * addresses it is their problem. 825 * 826 * We do not have to care about byte order for these 827 * checks so we will do them in NBO. 828 */ 829 for (ii = 0; ii < ip4s; ii++) { 830 if (ip4[ii].s_addr == INADDR_ANY || 831 ip4[ii].s_addr == INADDR_BROADCAST) { 832 error = EINVAL; 833 goto done_free; 834 } 835 if ((ii+1) < ip4s && 836 (ip4[0].s_addr == ip4[ii+1].s_addr || 837 ip4[ii].s_addr == ip4[ii+1].s_addr)) { 838 error = EINVAL; 839 goto done_free; 840 } 841 } 842 } 843 } 844 #endif 845 846 #ifdef INET6 847 error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 848 if (error == ENOENT) 849 ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1; 850 else if (error != 0) 851 goto done_free; 852 else if (ip6s & (sizeof(*ip6) - 1)) { 853 error = EINVAL; 854 goto done_free; 855 } else { 856 ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 857 if (ip6s == 0) 858 pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 859 else { 860 pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 861 ip6s /= sizeof(*ip6); 862 if (ip6s > jail_max_af_ips) { 863 error = EINVAL; 864 vfs_opterror(opts, "too many IPv6 addresses"); 865 goto done_errmsg; 866 } 867 ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 868 bcopy(op, ip6, ip6s * sizeof(*ip6)); 869 if (ip6s > 1) 870 qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 871 for (ii = 0; ii < ip6s; ii++) { 872 if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 873 error = EINVAL; 874 goto done_free; 875 } 876 if ((ii+1) < ip6s && 877 (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 878 IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 879 { 880 error = EINVAL; 881 goto done_free; 882 } 883 } 884 } 885 } 886 #endif 887 888 #if defined(VIMAGE) && (defined(INET) || defined(INET6)) 889 if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 890 error = EINVAL; 891 vfs_opterror(opts, 892 "vnet jails cannot have IP address restrictions"); 893 goto done_errmsg; 894 } 895 #endif 896 897 fullpath_disabled = 0; 898 root = NULL; 899 error = vfs_getopt(opts, "path", (void **)&path, &len); 900 if (error == ENOENT) 901 path = NULL; 902 else if (error != 0) 903 goto done_free; 904 else { 905 if (flags & JAIL_UPDATE) { 906 error = EINVAL; 907 vfs_opterror(opts, 908 "path cannot be changed after creation"); 909 goto done_errmsg; 910 } 911 if (len == 0 || path[len - 1] != '\0') { 912 error = EINVAL; 913 goto done_free; 914 } 915 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE, UIO_SYSSPACE, 916 path, td); 917 error = namei(&nd); 918 if (error) 919 goto done_free; 920 vfslocked = NDHASGIANT(&nd); 921 root = nd.ni_vp; 922 NDFREE(&nd, NDF_ONLY_PNBUF); 923 g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 924 strlcpy(g_path, path, MAXPATHLEN); 925 error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 926 if (error == 0) 927 path = g_path; 928 else if (error == ENODEV) { 929 /* proceed if sysctl debug.disablefullpath == 1 */ 930 fullpath_disabled = 1; 931 if (len < 2 || (len == 2 && path[0] == '/')) 932 path = NULL; 933 } else { 934 /* exit on other errors */ 935 VFS_UNLOCK_GIANT(vfslocked); 936 goto done_free; 937 } 938 if (root->v_type != VDIR) { 939 error = ENOTDIR; 940 vput(root); 941 VFS_UNLOCK_GIANT(vfslocked); 942 goto done_free; 943 } 944 VOP_UNLOCK(root, 0); 945 VFS_UNLOCK_GIANT(vfslocked); 946 if (fullpath_disabled) { 947 /* Leave room for a real-root full pathname. */ 948 if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 949 ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 950 error = ENAMETOOLONG; 951 goto done_free; 952 } 953 } 954 } 955 956 /* 957 * Grab the allprison lock before letting modules check their 958 * parameters. Once we have it, do not let go so we'll have a 959 * consistent view of the OSD list. 960 */ 961 sx_xlock(&allprison_lock); 962 error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 963 if (error) 964 goto done_unlock_list; 965 966 /* By now, all parameters should have been noted. */ 967 TAILQ_FOREACH(opt, opts, link) { 968 if (!opt->seen && strcmp(opt->name, "errmsg")) { 969 error = EINVAL; 970 vfs_opterror(opts, "unknown parameter: %s", opt->name); 971 goto done_unlock_list; 972 } 973 } 974 975 /* 976 * See if we are creating a new record or updating an existing one. 977 * This abuses the file error codes ENOENT and EEXIST. 978 */ 979 cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 980 if (!cuflags) { 981 error = EINVAL; 982 vfs_opterror(opts, "no valid operation (create or update)"); 983 goto done_unlock_list; 984 } 985 pr = NULL; 986 namelc = NULL; 987 if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 988 namelc = strrchr(name, '.'); 989 jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 990 if (*p != '\0') 991 jid = 0; 992 } 993 if (jid != 0) { 994 /* 995 * See if a requested jid already exists. There is an 996 * information leak here if the jid exists but is not within 997 * the caller's jail hierarchy. Jail creators will get EEXIST 998 * even though they cannot see the jail, and CREATE | UPDATE 999 * will return ENOENT which is not normally a valid error. 1000 */ 1001 if (jid < 0) { 1002 error = EINVAL; 1003 vfs_opterror(opts, "negative jid"); 1004 goto done_unlock_list; 1005 } 1006 pr = prison_find(jid); 1007 if (pr != NULL) { 1008 ppr = pr->pr_parent; 1009 /* Create: jid must not exist. */ 1010 if (cuflags == JAIL_CREATE) { 1011 mtx_unlock(&pr->pr_mtx); 1012 error = EEXIST; 1013 vfs_opterror(opts, "jail %d already exists", 1014 jid); 1015 goto done_unlock_list; 1016 } 1017 if (!prison_ischild(mypr, pr)) { 1018 mtx_unlock(&pr->pr_mtx); 1019 pr = NULL; 1020 } else if (pr->pr_uref == 0) { 1021 if (!(flags & JAIL_DYING)) { 1022 mtx_unlock(&pr->pr_mtx); 1023 error = ENOENT; 1024 vfs_opterror(opts, "jail %d is dying", 1025 jid); 1026 goto done_unlock_list; 1027 } else if ((flags & JAIL_ATTACH) || 1028 (pr_flags & PR_PERSIST)) { 1029 /* 1030 * A dying jail might be resurrected 1031 * (via attach or persist), but first 1032 * it must determine if another jail 1033 * has claimed its name. Accomplish 1034 * this by implicitly re-setting the 1035 * name. 1036 */ 1037 if (name == NULL) 1038 name = prison_name(mypr, pr); 1039 } 1040 } 1041 } 1042 if (pr == NULL) { 1043 /* Update: jid must exist. */ 1044 if (cuflags == JAIL_UPDATE) { 1045 error = ENOENT; 1046 vfs_opterror(opts, "jail %d not found", jid); 1047 goto done_unlock_list; 1048 } 1049 } 1050 } 1051 /* 1052 * If the caller provided a name, look for a jail by that name. 1053 * This has different semantics for creates and updates keyed by jid 1054 * (where the name must not already exist in a different jail), 1055 * and updates keyed by the name itself (where the name must exist 1056 * because that is the jail being updated). 1057 */ 1058 if (name != NULL) { 1059 namelc = strrchr(name, '.'); 1060 if (namelc == NULL) 1061 namelc = name; 1062 else { 1063 /* 1064 * This is a hierarchical name. Split it into the 1065 * parent and child names, and make sure the parent 1066 * exists or matches an already found jail. 1067 */ 1068 *namelc = '\0'; 1069 if (pr != NULL) { 1070 if (strncmp(name, ppr->pr_name, namelc - name) 1071 || ppr->pr_name[namelc - name] != '\0') { 1072 mtx_unlock(&pr->pr_mtx); 1073 error = EINVAL; 1074 vfs_opterror(opts, 1075 "cannot change jail's parent"); 1076 goto done_unlock_list; 1077 } 1078 } else { 1079 ppr = prison_find_name(mypr, name); 1080 if (ppr == NULL) { 1081 error = ENOENT; 1082 vfs_opterror(opts, 1083 "jail \"%s\" not found", name); 1084 goto done_unlock_list; 1085 } 1086 mtx_unlock(&ppr->pr_mtx); 1087 } 1088 name = ++namelc; 1089 } 1090 if (name[0] != '\0') { 1091 namelen = 1092 (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1093 name_again: 1094 deadpr = NULL; 1095 FOREACH_PRISON_CHILD(ppr, tpr) { 1096 if (tpr != pr && tpr->pr_ref > 0 && 1097 !strcmp(tpr->pr_name + namelen, name)) { 1098 if (pr == NULL && 1099 cuflags != JAIL_CREATE) { 1100 mtx_lock(&tpr->pr_mtx); 1101 if (tpr->pr_ref > 0) { 1102 /* 1103 * Use this jail 1104 * for updates. 1105 */ 1106 if (tpr->pr_uref > 0) { 1107 pr = tpr; 1108 break; 1109 } 1110 deadpr = tpr; 1111 } 1112 mtx_unlock(&tpr->pr_mtx); 1113 } else if (tpr->pr_uref > 0) { 1114 /* 1115 * Create, or update(jid): 1116 * name must not exist in an 1117 * active sibling jail. 1118 */ 1119 error = EEXIST; 1120 if (pr != NULL) 1121 mtx_unlock(&pr->pr_mtx); 1122 vfs_opterror(opts, 1123 "jail \"%s\" already exists", 1124 name); 1125 goto done_unlock_list; 1126 } 1127 } 1128 } 1129 /* If no active jail is found, use a dying one. */ 1130 if (deadpr != NULL && pr == NULL) { 1131 if (flags & JAIL_DYING) { 1132 mtx_lock(&deadpr->pr_mtx); 1133 if (deadpr->pr_ref == 0) { 1134 mtx_unlock(&deadpr->pr_mtx); 1135 goto name_again; 1136 } 1137 pr = deadpr; 1138 } else if (cuflags == JAIL_UPDATE) { 1139 error = ENOENT; 1140 vfs_opterror(opts, 1141 "jail \"%s\" is dying", name); 1142 goto done_unlock_list; 1143 } 1144 } 1145 /* Update: name must exist if no jid. */ 1146 else if (cuflags == JAIL_UPDATE && pr == NULL) { 1147 error = ENOENT; 1148 vfs_opterror(opts, "jail \"%s\" not found", 1149 name); 1150 goto done_unlock_list; 1151 } 1152 } 1153 } 1154 /* Update: must provide a jid or name. */ 1155 else if (cuflags == JAIL_UPDATE && pr == NULL) { 1156 error = ENOENT; 1157 vfs_opterror(opts, "update specified no jail"); 1158 goto done_unlock_list; 1159 } 1160 1161 /* If there's no prison to update, create a new one and link it in. */ 1162 if (pr == NULL) { 1163 for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1164 if (tpr->pr_childcount >= tpr->pr_childmax) { 1165 error = EPERM; 1166 vfs_opterror(opts, "prison limit exceeded"); 1167 goto done_unlock_list; 1168 } 1169 created = 1; 1170 mtx_lock(&ppr->pr_mtx); 1171 if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1172 mtx_unlock(&ppr->pr_mtx); 1173 error = ENOENT; 1174 vfs_opterror(opts, "parent jail went away!"); 1175 goto done_unlock_list; 1176 } 1177 ppr->pr_ref++; 1178 ppr->pr_uref++; 1179 mtx_unlock(&ppr->pr_mtx); 1180 pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1181 if (jid == 0) { 1182 /* Find the next free jid. */ 1183 jid = lastprid + 1; 1184 findnext: 1185 if (jid == JAIL_MAX) 1186 jid = 1; 1187 TAILQ_FOREACH(tpr, &allprison, pr_list) { 1188 if (tpr->pr_id < jid) 1189 continue; 1190 if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1191 TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1192 break; 1193 } 1194 if (jid == lastprid) { 1195 error = EAGAIN; 1196 vfs_opterror(opts, 1197 "no available jail IDs"); 1198 free(pr, M_PRISON); 1199 prison_deref(ppr, PD_DEREF | 1200 PD_DEUREF | PD_LIST_XLOCKED); 1201 goto done_releroot; 1202 } 1203 jid++; 1204 goto findnext; 1205 } 1206 lastprid = jid; 1207 } else { 1208 /* 1209 * The jail already has a jid (that did not yet exist), 1210 * so just find where to insert it. 1211 */ 1212 TAILQ_FOREACH(tpr, &allprison, pr_list) 1213 if (tpr->pr_id >= jid) { 1214 TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1215 break; 1216 } 1217 } 1218 if (tpr == NULL) 1219 TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1220 LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1221 for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1222 tpr->pr_childcount++; 1223 1224 pr->pr_parent = ppr; 1225 pr->pr_id = jid; 1226 1227 /* Set some default values, and inherit some from the parent. */ 1228 if (name == NULL) 1229 name = ""; 1230 if (path == NULL) { 1231 path = "/"; 1232 root = mypr->pr_root; 1233 vref(root); 1234 } 1235 strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1236 pr->pr_flags |= PR_HOST; 1237 #if defined(INET) || defined(INET6) 1238 #ifdef VIMAGE 1239 if (!(pr_flags & PR_VNET)) 1240 #endif 1241 { 1242 #ifdef INET 1243 if (!(ch_flags & PR_IP4_USER)) 1244 pr->pr_flags |= 1245 PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1246 else if (!(pr_flags & PR_IP4_USER)) { 1247 pr->pr_flags |= ppr->pr_flags & PR_IP4; 1248 if (ppr->pr_ip4 != NULL) { 1249 pr->pr_ip4s = ppr->pr_ip4s; 1250 pr->pr_ip4 = malloc(pr->pr_ip4s * 1251 sizeof(struct in_addr), M_PRISON, 1252 M_WAITOK); 1253 bcopy(ppr->pr_ip4, pr->pr_ip4, 1254 pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1255 } 1256 } 1257 #endif 1258 #ifdef INET6 1259 if (!(ch_flags & PR_IP6_USER)) 1260 pr->pr_flags |= 1261 PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1262 else if (!(pr_flags & PR_IP6_USER)) { 1263 pr->pr_flags |= ppr->pr_flags & PR_IP6; 1264 if (ppr->pr_ip6 != NULL) { 1265 pr->pr_ip6s = ppr->pr_ip6s; 1266 pr->pr_ip6 = malloc(pr->pr_ip6s * 1267 sizeof(struct in6_addr), M_PRISON, 1268 M_WAITOK); 1269 bcopy(ppr->pr_ip6, pr->pr_ip6, 1270 pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1271 } 1272 } 1273 #endif 1274 } 1275 #endif 1276 /* Source address selection is always on by default. */ 1277 pr->pr_flags |= _PR_IP_SADDRSEL; 1278 1279 pr->pr_securelevel = ppr->pr_securelevel; 1280 pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1281 pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1282 pr->pr_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM; 1283 1284 LIST_INIT(&pr->pr_children); 1285 mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1286 1287 #ifdef VIMAGE 1288 /* Allocate a new vnet if specified. */ 1289 pr->pr_vnet = (pr_flags & PR_VNET) 1290 ? vnet_alloc() : ppr->pr_vnet; 1291 #endif 1292 /* 1293 * Allocate a dedicated cpuset for each jail. 1294 * Unlike other initial settings, this may return an erorr. 1295 */ 1296 error = cpuset_create_root(ppr, &pr->pr_cpuset); 1297 if (error) { 1298 prison_deref(pr, PD_LIST_XLOCKED); 1299 goto done_releroot; 1300 } 1301 1302 mtx_lock(&pr->pr_mtx); 1303 /* 1304 * New prisons do not yet have a reference, because we do not 1305 * want other to see the incomplete prison once the 1306 * allprison_lock is downgraded. 1307 */ 1308 } else { 1309 created = 0; 1310 /* 1311 * Grab a reference for existing prisons, to ensure they 1312 * continue to exist for the duration of the call. 1313 */ 1314 pr->pr_ref++; 1315 #if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1316 if ((pr->pr_flags & PR_VNET) && 1317 (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1318 error = EINVAL; 1319 vfs_opterror(opts, 1320 "vnet jails cannot have IP address restrictions"); 1321 goto done_deref_locked; 1322 } 1323 #endif 1324 #ifdef INET 1325 if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1326 error = EINVAL; 1327 vfs_opterror(opts, 1328 "ip4 cannot be changed after creation"); 1329 goto done_deref_locked; 1330 } 1331 #endif 1332 #ifdef INET6 1333 if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1334 error = EINVAL; 1335 vfs_opterror(opts, 1336 "ip6 cannot be changed after creation"); 1337 goto done_deref_locked; 1338 } 1339 #endif 1340 } 1341 1342 /* Do final error checking before setting anything. */ 1343 if (gotslevel) { 1344 if (slevel < ppr->pr_securelevel) { 1345 error = EPERM; 1346 goto done_deref_locked; 1347 } 1348 } 1349 if (gotchildmax) { 1350 if (childmax >= ppr->pr_childmax) { 1351 error = EPERM; 1352 goto done_deref_locked; 1353 } 1354 } 1355 if (gotenforce) { 1356 if (enforce < ppr->pr_enforce_statfs) { 1357 error = EPERM; 1358 goto done_deref_locked; 1359 } 1360 } 1361 if (gotrsnum) { 1362 /* 1363 * devfs_rsnum is a uint16_t 1364 * value of -1 disables devfs mounts 1365 */ 1366 if (rsnum < -1 || rsnum > 65535) { 1367 error = EINVAL; 1368 goto done_deref_locked; 1369 } 1370 /* 1371 * Nested jails may inherit parent's devfs ruleset 1372 * or disable devfs 1373 */ 1374 if (jailed(td->td_ucred)) { 1375 if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) { 1376 error = EPERM; 1377 goto done_deref_locked; 1378 } else if (rsnum == 0) 1379 rsnum = ppr->pr_devfs_rsnum; 1380 } 1381 } 1382 #ifdef INET 1383 if (ip4s > 0) { 1384 if (ppr->pr_flags & PR_IP4) { 1385 /* 1386 * Make sure the new set of IP addresses is a 1387 * subset of the parent's list. Don't worry 1388 * about the parent being unlocked, as any 1389 * setting is done with allprison_lock held. 1390 */ 1391 for (ij = 0; ij < ppr->pr_ip4s; ij++) 1392 if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1393 break; 1394 if (ij == ppr->pr_ip4s) { 1395 error = EPERM; 1396 goto done_deref_locked; 1397 } 1398 if (ip4s > 1) { 1399 for (ii = ij = 1; ii < ip4s; ii++) { 1400 if (ip4[ii].s_addr == 1401 ppr->pr_ip4[0].s_addr) 1402 continue; 1403 for (; ij < ppr->pr_ip4s; ij++) 1404 if (ip4[ii].s_addr == 1405 ppr->pr_ip4[ij].s_addr) 1406 break; 1407 if (ij == ppr->pr_ip4s) 1408 break; 1409 } 1410 if (ij == ppr->pr_ip4s) { 1411 error = EPERM; 1412 goto done_deref_locked; 1413 } 1414 } 1415 } 1416 /* 1417 * Check for conflicting IP addresses. We permit them 1418 * if there is no more than one IP on each jail. If 1419 * there is a duplicate on a jail with more than one 1420 * IP stop checking and return error. 1421 */ 1422 tppr = ppr; 1423 #ifdef VIMAGE 1424 for (; tppr != &prison0; tppr = tppr->pr_parent) 1425 if (tppr->pr_flags & PR_VNET) 1426 break; 1427 #endif 1428 FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1429 if (tpr == pr || 1430 #ifdef VIMAGE 1431 (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1432 #endif 1433 tpr->pr_uref == 0) { 1434 descend = 0; 1435 continue; 1436 } 1437 if (!(tpr->pr_flags & PR_IP4_USER)) 1438 continue; 1439 descend = 0; 1440 if (tpr->pr_ip4 == NULL || 1441 (ip4s == 1 && tpr->pr_ip4s == 1)) 1442 continue; 1443 for (ii = 0; ii < ip4s; ii++) { 1444 if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1445 error = EADDRINUSE; 1446 vfs_opterror(opts, 1447 "IPv4 addresses clash"); 1448 goto done_deref_locked; 1449 } 1450 } 1451 } 1452 } 1453 #endif 1454 #ifdef INET6 1455 if (ip6s > 0) { 1456 if (ppr->pr_flags & PR_IP6) { 1457 /* 1458 * Make sure the new set of IP addresses is a 1459 * subset of the parent's list. 1460 */ 1461 for (ij = 0; ij < ppr->pr_ip6s; ij++) 1462 if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1463 &ppr->pr_ip6[ij])) 1464 break; 1465 if (ij == ppr->pr_ip6s) { 1466 error = EPERM; 1467 goto done_deref_locked; 1468 } 1469 if (ip6s > 1) { 1470 for (ii = ij = 1; ii < ip6s; ii++) { 1471 if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1472 &ppr->pr_ip6[0])) 1473 continue; 1474 for (; ij < ppr->pr_ip6s; ij++) 1475 if (IN6_ARE_ADDR_EQUAL( 1476 &ip6[ii], &ppr->pr_ip6[ij])) 1477 break; 1478 if (ij == ppr->pr_ip6s) 1479 break; 1480 } 1481 if (ij == ppr->pr_ip6s) { 1482 error = EPERM; 1483 goto done_deref_locked; 1484 } 1485 } 1486 } 1487 /* Check for conflicting IP addresses. */ 1488 tppr = ppr; 1489 #ifdef VIMAGE 1490 for (; tppr != &prison0; tppr = tppr->pr_parent) 1491 if (tppr->pr_flags & PR_VNET) 1492 break; 1493 #endif 1494 FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1495 if (tpr == pr || 1496 #ifdef VIMAGE 1497 (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1498 #endif 1499 tpr->pr_uref == 0) { 1500 descend = 0; 1501 continue; 1502 } 1503 if (!(tpr->pr_flags & PR_IP6_USER)) 1504 continue; 1505 descend = 0; 1506 if (tpr->pr_ip6 == NULL || 1507 (ip6s == 1 && tpr->pr_ip6s == 1)) 1508 continue; 1509 for (ii = 0; ii < ip6s; ii++) { 1510 if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1511 error = EADDRINUSE; 1512 vfs_opterror(opts, 1513 "IPv6 addresses clash"); 1514 goto done_deref_locked; 1515 } 1516 } 1517 } 1518 } 1519 #endif 1520 onamelen = namelen = 0; 1521 if (name != NULL) { 1522 /* Give a default name of the jid. */ 1523 if (name[0] == '\0') 1524 snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1525 else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid && 1526 *p == '\0')) { 1527 error = EINVAL; 1528 vfs_opterror(opts, 1529 "name cannot be numeric (unless it is the jid)"); 1530 goto done_deref_locked; 1531 } 1532 /* 1533 * Make sure the name isn't too long for the prison or its 1534 * children. 1535 */ 1536 onamelen = strlen(pr->pr_name); 1537 namelen = strlen(name); 1538 if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1539 error = ENAMETOOLONG; 1540 goto done_deref_locked; 1541 } 1542 FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1543 if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1544 sizeof(pr->pr_name)) { 1545 error = ENAMETOOLONG; 1546 goto done_deref_locked; 1547 } 1548 } 1549 } 1550 if (pr_allow & ~ppr->pr_allow) { 1551 error = EPERM; 1552 goto done_deref_locked; 1553 } 1554 1555 /* Set the parameters of the prison. */ 1556 #ifdef INET 1557 redo_ip4 = 0; 1558 if (pr_flags & PR_IP4_USER) { 1559 pr->pr_flags |= PR_IP4; 1560 free(pr->pr_ip4, M_PRISON); 1561 pr->pr_ip4s = ip4s; 1562 pr->pr_ip4 = ip4; 1563 ip4 = NULL; 1564 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1565 #ifdef VIMAGE 1566 if (tpr->pr_flags & PR_VNET) { 1567 descend = 0; 1568 continue; 1569 } 1570 #endif 1571 if (prison_restrict_ip4(tpr, NULL)) { 1572 redo_ip4 = 1; 1573 descend = 0; 1574 } 1575 } 1576 } 1577 #endif 1578 #ifdef INET6 1579 redo_ip6 = 0; 1580 if (pr_flags & PR_IP6_USER) { 1581 pr->pr_flags |= PR_IP6; 1582 free(pr->pr_ip6, M_PRISON); 1583 pr->pr_ip6s = ip6s; 1584 pr->pr_ip6 = ip6; 1585 ip6 = NULL; 1586 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1587 #ifdef VIMAGE 1588 if (tpr->pr_flags & PR_VNET) { 1589 descend = 0; 1590 continue; 1591 } 1592 #endif 1593 if (prison_restrict_ip6(tpr, NULL)) { 1594 redo_ip6 = 1; 1595 descend = 0; 1596 } 1597 } 1598 } 1599 #endif 1600 if (gotslevel) { 1601 pr->pr_securelevel = slevel; 1602 /* Set all child jails to be at least this level. */ 1603 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1604 if (tpr->pr_securelevel < slevel) 1605 tpr->pr_securelevel = slevel; 1606 } 1607 if (gotchildmax) { 1608 pr->pr_childmax = childmax; 1609 /* Set all child jails to under this limit. */ 1610 FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1611 if (tpr->pr_childmax > childmax - level) 1612 tpr->pr_childmax = childmax > level 1613 ? childmax - level : 0; 1614 } 1615 if (gotenforce) { 1616 pr->pr_enforce_statfs = enforce; 1617 /* Pass this restriction on to the children. */ 1618 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1619 if (tpr->pr_enforce_statfs < enforce) 1620 tpr->pr_enforce_statfs = enforce; 1621 } 1622 if (gotrsnum) { 1623 pr->pr_devfs_rsnum = rsnum; 1624 /* Pass this restriction on to the children. */ 1625 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1626 if (tpr->pr_devfs_rsnum != -1) 1627 tpr->pr_devfs_rsnum = rsnum; 1628 } 1629 if (name != NULL) { 1630 if (ppr == &prison0) 1631 strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1632 else 1633 snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1634 ppr->pr_name, name); 1635 /* Change this component of child names. */ 1636 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1637 bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1638 strlen(tpr->pr_name + onamelen) + 1); 1639 bcopy(pr->pr_name, tpr->pr_name, namelen); 1640 } 1641 } 1642 if (path != NULL) { 1643 /* Try to keep a real-rooted full pathname. */ 1644 if (fullpath_disabled && path[0] == '/' && 1645 strcmp(mypr->pr_path, "/")) 1646 snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1647 mypr->pr_path, path); 1648 else 1649 strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1650 pr->pr_root = root; 1651 } 1652 if (PR_HOST & ch_flags & ~pr_flags) { 1653 if (pr->pr_flags & PR_HOST) { 1654 /* 1655 * Copy the parent's host info. As with pr_ip4 above, 1656 * the lack of a lock on the parent is not a problem; 1657 * it is always set with allprison_lock at least 1658 * shared, and is held exclusively here. 1659 */ 1660 strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1661 sizeof(pr->pr_hostname)); 1662 strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1663 sizeof(pr->pr_domainname)); 1664 strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1665 sizeof(pr->pr_hostuuid)); 1666 pr->pr_hostid = pr->pr_parent->pr_hostid; 1667 } 1668 } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1669 /* Set this prison, and any descendants without PR_HOST. */ 1670 if (host != NULL) 1671 strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1672 if (domain != NULL) 1673 strlcpy(pr->pr_domainname, domain, 1674 sizeof(pr->pr_domainname)); 1675 if (uuid != NULL) 1676 strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1677 if (gothid) 1678 pr->pr_hostid = hid; 1679 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1680 if (tpr->pr_flags & PR_HOST) 1681 descend = 0; 1682 else { 1683 if (host != NULL) 1684 strlcpy(tpr->pr_hostname, 1685 pr->pr_hostname, 1686 sizeof(tpr->pr_hostname)); 1687 if (domain != NULL) 1688 strlcpy(tpr->pr_domainname, 1689 pr->pr_domainname, 1690 sizeof(tpr->pr_domainname)); 1691 if (uuid != NULL) 1692 strlcpy(tpr->pr_hostuuid, 1693 pr->pr_hostuuid, 1694 sizeof(tpr->pr_hostuuid)); 1695 if (gothid) 1696 tpr->pr_hostid = hid; 1697 } 1698 } 1699 } 1700 if ((tallow = ch_allow & ~pr_allow)) { 1701 /* Clear allow bits in all children. */ 1702 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1703 tpr->pr_allow &= ~tallow; 1704 } 1705 pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1706 /* 1707 * Persistent prisons get an extra reference, and prisons losing their 1708 * persist flag lose that reference. Only do this for existing prisons 1709 * for now, so new ones will remain unseen until after the module 1710 * handlers have completed. 1711 */ 1712 if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1713 if (pr_flags & PR_PERSIST) { 1714 pr->pr_ref++; 1715 pr->pr_uref++; 1716 } else { 1717 pr->pr_ref--; 1718 pr->pr_uref--; 1719 } 1720 } 1721 pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1722 mtx_unlock(&pr->pr_mtx); 1723 1724 #ifdef RACCT 1725 if (created) 1726 prison_racct_attach(pr); 1727 #endif 1728 1729 /* Locks may have prevented a complete restriction of child IP 1730 * addresses. If so, allocate some more memory and try again. 1731 */ 1732 #ifdef INET 1733 while (redo_ip4) { 1734 ip4s = pr->pr_ip4s; 1735 ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1736 mtx_lock(&pr->pr_mtx); 1737 redo_ip4 = 0; 1738 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1739 #ifdef VIMAGE 1740 if (tpr->pr_flags & PR_VNET) { 1741 descend = 0; 1742 continue; 1743 } 1744 #endif 1745 if (prison_restrict_ip4(tpr, ip4)) { 1746 if (ip4 != NULL) 1747 ip4 = NULL; 1748 else 1749 redo_ip4 = 1; 1750 } 1751 } 1752 mtx_unlock(&pr->pr_mtx); 1753 } 1754 #endif 1755 #ifdef INET6 1756 while (redo_ip6) { 1757 ip6s = pr->pr_ip6s; 1758 ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1759 mtx_lock(&pr->pr_mtx); 1760 redo_ip6 = 0; 1761 FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1762 #ifdef VIMAGE 1763 if (tpr->pr_flags & PR_VNET) { 1764 descend = 0; 1765 continue; 1766 } 1767 #endif 1768 if (prison_restrict_ip6(tpr, ip6)) { 1769 if (ip6 != NULL) 1770 ip6 = NULL; 1771 else 1772 redo_ip6 = 1; 1773 } 1774 } 1775 mtx_unlock(&pr->pr_mtx); 1776 } 1777 #endif 1778 1779 /* Let the modules do their work. */ 1780 sx_downgrade(&allprison_lock); 1781 if (created) { 1782 error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1783 if (error) { 1784 prison_deref(pr, PD_LIST_SLOCKED); 1785 goto done_errmsg; 1786 } 1787 } 1788 error = osd_jail_call(pr, PR_METHOD_SET, opts); 1789 if (error) { 1790 prison_deref(pr, created 1791 ? PD_LIST_SLOCKED 1792 : PD_DEREF | PD_LIST_SLOCKED); 1793 goto done_errmsg; 1794 } 1795 1796 /* Attach this process to the prison if requested. */ 1797 if (flags & JAIL_ATTACH) { 1798 mtx_lock(&pr->pr_mtx); 1799 error = do_jail_attach(td, pr); 1800 if (error) { 1801 vfs_opterror(opts, "attach failed"); 1802 if (!created) 1803 prison_deref(pr, PD_DEREF); 1804 goto done_errmsg; 1805 } 1806 } 1807 1808 /* 1809 * Now that it is all there, drop the temporary reference from existing 1810 * prisons. Or add a reference to newly created persistent prisons 1811 * (which was not done earlier so that the prison would not be publicly 1812 * visible). 1813 */ 1814 if (!created) { 1815 prison_deref(pr, (flags & JAIL_ATTACH) 1816 ? PD_DEREF 1817 : PD_DEREF | PD_LIST_SLOCKED); 1818 } else { 1819 if (pr_flags & PR_PERSIST) { 1820 mtx_lock(&pr->pr_mtx); 1821 pr->pr_ref++; 1822 pr->pr_uref++; 1823 mtx_unlock(&pr->pr_mtx); 1824 } 1825 if (!(flags & JAIL_ATTACH)) 1826 sx_sunlock(&allprison_lock); 1827 } 1828 td->td_retval[0] = pr->pr_id; 1829 goto done_errmsg; 1830 1831 done_deref_locked: 1832 prison_deref(pr, created 1833 ? PD_LOCKED | PD_LIST_XLOCKED 1834 : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1835 goto done_releroot; 1836 done_unlock_list: 1837 sx_xunlock(&allprison_lock); 1838 done_releroot: 1839 if (root != NULL) { 1840 vfslocked = VFS_LOCK_GIANT(root->v_mount); 1841 vrele(root); 1842 VFS_UNLOCK_GIANT(vfslocked); 1843 } 1844 done_errmsg: 1845 if (error) { 1846 vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1847 if (errmsg_len > 0) { 1848 errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1849 if (errmsg_pos > 0) { 1850 if (optuio->uio_segflg == UIO_SYSSPACE) 1851 bcopy(errmsg, 1852 optuio->uio_iov[errmsg_pos].iov_base, 1853 errmsg_len); 1854 else 1855 copyout(errmsg, 1856 optuio->uio_iov[errmsg_pos].iov_base, 1857 errmsg_len); 1858 } 1859 } 1860 } 1861 done_free: 1862 #ifdef INET 1863 free(ip4, M_PRISON); 1864 #endif 1865 #ifdef INET6 1866 free(ip6, M_PRISON); 1867 #endif 1868 if (g_path != NULL) 1869 free(g_path, M_TEMP); 1870 vfs_freeopts(opts); 1871 return (error); 1872 } 1873 1874 1875 /* 1876 * struct jail_get_args { 1877 * struct iovec *iovp; 1878 * unsigned int iovcnt; 1879 * int flags; 1880 * }; 1881 */ 1882 int 1883 sys_jail_get(struct thread *td, struct jail_get_args *uap) 1884 { 1885 struct uio *auio; 1886 int error; 1887 1888 /* Check that we have an even number of iovecs. */ 1889 if (uap->iovcnt & 1) 1890 return (EINVAL); 1891 1892 error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1893 if (error) 1894 return (error); 1895 error = kern_jail_get(td, auio, uap->flags); 1896 if (error == 0) 1897 error = copyout(auio->uio_iov, uap->iovp, 1898 uap->iovcnt * sizeof (struct iovec)); 1899 free(auio, M_IOV); 1900 return (error); 1901 } 1902 1903 int 1904 kern_jail_get(struct thread *td, struct uio *optuio, int flags) 1905 { 1906 struct prison *pr, *mypr; 1907 struct vfsopt *opt; 1908 struct vfsoptlist *opts; 1909 char *errmsg, *name; 1910 int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1911 1912 if (flags & ~JAIL_GET_MASK) 1913 return (EINVAL); 1914 1915 /* Get the parameter list. */ 1916 error = vfs_buildopts(optuio, &opts); 1917 if (error) 1918 return (error); 1919 errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1920 mypr = td->td_ucred->cr_prison; 1921 1922 /* 1923 * Find the prison specified by one of: lastjid, jid, name. 1924 */ 1925 sx_slock(&allprison_lock); 1926 error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1927 if (error == 0) { 1928 TAILQ_FOREACH(pr, &allprison, pr_list) { 1929 if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1930 mtx_lock(&pr->pr_mtx); 1931 if (pr->pr_ref > 0 && 1932 (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1933 break; 1934 mtx_unlock(&pr->pr_mtx); 1935 } 1936 } 1937 if (pr != NULL) 1938 goto found_prison; 1939 error = ENOENT; 1940 vfs_opterror(opts, "no jail after %d", jid); 1941 goto done_unlock_list; 1942 } else if (error != ENOENT) 1943 goto done_unlock_list; 1944 1945 error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1946 if (error == 0) { 1947 if (jid != 0) { 1948 pr = prison_find_child(mypr, jid); 1949 if (pr != NULL) { 1950 if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1951 mtx_unlock(&pr->pr_mtx); 1952 error = ENOENT; 1953 vfs_opterror(opts, "jail %d is dying", 1954 jid); 1955 goto done_unlock_list; 1956 } 1957 goto found_prison; 1958 } 1959 error = ENOENT; 1960 vfs_opterror(opts, "jail %d not found", jid); 1961 goto done_unlock_list; 1962 } 1963 } else if (error != ENOENT) 1964 goto done_unlock_list; 1965 1966 error = vfs_getopt(opts, "name", (void **)&name, &len); 1967 if (error == 0) { 1968 if (len == 0 || name[len - 1] != '\0') { 1969 error = EINVAL; 1970 goto done_unlock_list; 1971 } 1972 pr = prison_find_name(mypr, name); 1973 if (pr != NULL) { 1974 if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1975 mtx_unlock(&pr->pr_mtx); 1976 error = ENOENT; 1977 vfs_opterror(opts, "jail \"%s\" is dying", 1978 name); 1979 goto done_unlock_list; 1980 } 1981 goto found_prison; 1982 } 1983 error = ENOENT; 1984 vfs_opterror(opts, "jail \"%s\" not found", name); 1985 goto done_unlock_list; 1986 } else if (error != ENOENT) 1987 goto done_unlock_list; 1988 1989 vfs_opterror(opts, "no jail specified"); 1990 error = ENOENT; 1991 goto done_unlock_list; 1992 1993 found_prison: 1994 /* Get the parameters of the prison. */ 1995 pr->pr_ref++; 1996 locked = PD_LOCKED; 1997 td->td_retval[0] = pr->pr_id; 1998 error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 1999 if (error != 0 && error != ENOENT) 2000 goto done_deref; 2001 i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 2002 error = vfs_setopt(opts, "parent", &i, sizeof(i)); 2003 if (error != 0 && error != ENOENT) 2004 goto done_deref; 2005 error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 2006 if (error != 0 && error != ENOENT) 2007 goto done_deref; 2008 error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 2009 sizeof(pr->pr_cpuset->cs_id)); 2010 if (error != 0 && error != ENOENT) 2011 goto done_deref; 2012 error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 2013 if (error != 0 && error != ENOENT) 2014 goto done_deref; 2015 #ifdef INET 2016 error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 2017 pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2018 if (error != 0 && error != ENOENT) 2019 goto done_deref; 2020 #endif 2021 #ifdef INET6 2022 error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 2023 pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2024 if (error != 0 && error != ENOENT) 2025 goto done_deref; 2026 #endif 2027 error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 2028 sizeof(pr->pr_securelevel)); 2029 if (error != 0 && error != ENOENT) 2030 goto done_deref; 2031 error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 2032 sizeof(pr->pr_childcount)); 2033 if (error != 0 && error != ENOENT) 2034 goto done_deref; 2035 error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 2036 sizeof(pr->pr_childmax)); 2037 if (error != 0 && error != ENOENT) 2038 goto done_deref; 2039 error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2040 if (error != 0 && error != ENOENT) 2041 goto done_deref; 2042 error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2043 if (error != 0 && error != ENOENT) 2044 goto done_deref; 2045 error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2046 if (error != 0 && error != ENOENT) 2047 goto done_deref; 2048 #ifdef COMPAT_FREEBSD32 2049 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2050 uint32_t hid32 = pr->pr_hostid; 2051 2052 error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2053 } else 2054 #endif 2055 error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2056 sizeof(pr->pr_hostid)); 2057 if (error != 0 && error != ENOENT) 2058 goto done_deref; 2059 error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2060 sizeof(pr->pr_enforce_statfs)); 2061 if (error != 0 && error != ENOENT) 2062 goto done_deref; 2063 error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum, 2064 sizeof(pr->pr_devfs_rsnum)); 2065 if (error != 0 && error != ENOENT) 2066 goto done_deref; 2067 for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2068 fi++) { 2069 if (pr_flag_names[fi] == NULL) 2070 continue; 2071 i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2072 error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2073 if (error != 0 && error != ENOENT) 2074 goto done_deref; 2075 i = !i; 2076 error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2077 if (error != 0 && error != ENOENT) 2078 goto done_deref; 2079 } 2080 for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2081 fi++) { 2082 i = pr->pr_flags & 2083 (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2084 i = pr_flag_jailsys[fi].disable && 2085 (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2086 : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2087 : JAIL_SYS_INHERIT; 2088 error = 2089 vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2090 if (error != 0 && error != ENOENT) 2091 goto done_deref; 2092 } 2093 for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2094 fi++) { 2095 if (pr_allow_names[fi] == NULL) 2096 continue; 2097 i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2098 error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2099 if (error != 0 && error != ENOENT) 2100 goto done_deref; 2101 i = !i; 2102 error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2103 if (error != 0 && error != ENOENT) 2104 goto done_deref; 2105 } 2106 i = (pr->pr_uref == 0); 2107 error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2108 if (error != 0 && error != ENOENT) 2109 goto done_deref; 2110 i = !i; 2111 error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2112 if (error != 0 && error != ENOENT) 2113 goto done_deref; 2114 2115 /* Get the module parameters. */ 2116 mtx_unlock(&pr->pr_mtx); 2117 locked = 0; 2118 error = osd_jail_call(pr, PR_METHOD_GET, opts); 2119 if (error) 2120 goto done_deref; 2121 prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 2122 2123 /* By now, all parameters should have been noted. */ 2124 TAILQ_FOREACH(opt, opts, link) { 2125 if (!opt->seen && strcmp(opt->name, "errmsg")) { 2126 error = EINVAL; 2127 vfs_opterror(opts, "unknown parameter: %s", opt->name); 2128 goto done_errmsg; 2129 } 2130 } 2131 2132 /* Write the fetched parameters back to userspace. */ 2133 error = 0; 2134 TAILQ_FOREACH(opt, opts, link) { 2135 if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2136 pos = 2 * opt->pos + 1; 2137 optuio->uio_iov[pos].iov_len = opt->len; 2138 if (opt->value != NULL) { 2139 if (optuio->uio_segflg == UIO_SYSSPACE) { 2140 bcopy(opt->value, 2141 optuio->uio_iov[pos].iov_base, 2142 opt->len); 2143 } else { 2144 error = copyout(opt->value, 2145 optuio->uio_iov[pos].iov_base, 2146 opt->len); 2147 if (error) 2148 break; 2149 } 2150 } 2151 } 2152 } 2153 goto done_errmsg; 2154 2155 done_deref: 2156 prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2157 goto done_errmsg; 2158 2159 done_unlock_list: 2160 sx_sunlock(&allprison_lock); 2161 done_errmsg: 2162 if (error && errmsg_pos >= 0) { 2163 vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2164 errmsg_pos = 2 * errmsg_pos + 1; 2165 if (errmsg_len > 0) { 2166 if (optuio->uio_segflg == UIO_SYSSPACE) 2167 bcopy(errmsg, 2168 optuio->uio_iov[errmsg_pos].iov_base, 2169 errmsg_len); 2170 else 2171 copyout(errmsg, 2172 optuio->uio_iov[errmsg_pos].iov_base, 2173 errmsg_len); 2174 } 2175 } 2176 vfs_freeopts(opts); 2177 return (error); 2178 } 2179 2180 2181 /* 2182 * struct jail_remove_args { 2183 * int jid; 2184 * }; 2185 */ 2186 int 2187 sys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2188 { 2189 struct prison *pr, *cpr, *lpr, *tpr; 2190 int descend, error; 2191 2192 error = priv_check(td, PRIV_JAIL_REMOVE); 2193 if (error) 2194 return (error); 2195 2196 sx_xlock(&allprison_lock); 2197 pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2198 if (pr == NULL) { 2199 sx_xunlock(&allprison_lock); 2200 return (EINVAL); 2201 } 2202 2203 /* Remove all descendants of this prison, then remove this prison. */ 2204 pr->pr_ref++; 2205 pr->pr_flags |= PR_REMOVE; 2206 if (!LIST_EMPTY(&pr->pr_children)) { 2207 mtx_unlock(&pr->pr_mtx); 2208 lpr = NULL; 2209 FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2210 mtx_lock(&cpr->pr_mtx); 2211 if (cpr->pr_ref > 0) { 2212 tpr = cpr; 2213 cpr->pr_ref++; 2214 cpr->pr_flags |= PR_REMOVE; 2215 } else { 2216 /* Already removed - do not do it again. */ 2217 tpr = NULL; 2218 } 2219 mtx_unlock(&cpr->pr_mtx); 2220 if (lpr != NULL) { 2221 mtx_lock(&lpr->pr_mtx); 2222 prison_remove_one(lpr); 2223 sx_xlock(&allprison_lock); 2224 } 2225 lpr = tpr; 2226 } 2227 if (lpr != NULL) { 2228 mtx_lock(&lpr->pr_mtx); 2229 prison_remove_one(lpr); 2230 sx_xlock(&allprison_lock); 2231 } 2232 mtx_lock(&pr->pr_mtx); 2233 } 2234 prison_remove_one(pr); 2235 return (0); 2236 } 2237 2238 static void 2239 prison_remove_one(struct prison *pr) 2240 { 2241 struct proc *p; 2242 int deuref; 2243 2244 /* If the prison was persistent, it is not anymore. */ 2245 deuref = 0; 2246 if (pr->pr_flags & PR_PERSIST) { 2247 pr->pr_ref--; 2248 deuref = PD_DEUREF; 2249 pr->pr_flags &= ~PR_PERSIST; 2250 } 2251 2252 /* 2253 * jail_remove added a reference. If that's the only one, remove 2254 * the prison now. 2255 */ 2256 KASSERT(pr->pr_ref > 0, 2257 ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2258 if (pr->pr_ref == 1) { 2259 prison_deref(pr, 2260 deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2261 return; 2262 } 2263 2264 mtx_unlock(&pr->pr_mtx); 2265 sx_xunlock(&allprison_lock); 2266 /* 2267 * Kill all processes unfortunate enough to be attached to this prison. 2268 */ 2269 sx_slock(&allproc_lock); 2270 LIST_FOREACH(p, &allproc, p_list) { 2271 PROC_LOCK(p); 2272 if (p->p_state != PRS_NEW && p->p_ucred && 2273 p->p_ucred->cr_prison == pr) 2274 kern_psignal(p, SIGKILL); 2275 PROC_UNLOCK(p); 2276 } 2277 sx_sunlock(&allproc_lock); 2278 /* Remove the temporary reference added by jail_remove. */ 2279 prison_deref(pr, deuref | PD_DEREF); 2280 } 2281 2282 2283 /* 2284 * struct jail_attach_args { 2285 * int jid; 2286 * }; 2287 */ 2288 int 2289 sys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2290 { 2291 struct prison *pr; 2292 int error; 2293 2294 error = priv_check(td, PRIV_JAIL_ATTACH); 2295 if (error) 2296 return (error); 2297 2298 sx_slock(&allprison_lock); 2299 pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2300 if (pr == NULL) { 2301 sx_sunlock(&allprison_lock); 2302 return (EINVAL); 2303 } 2304 2305 /* 2306 * Do not allow a process to attach to a prison that is not 2307 * considered to be "alive". 2308 */ 2309 if (pr->pr_uref == 0) { 2310 mtx_unlock(&pr->pr_mtx); 2311 sx_sunlock(&allprison_lock); 2312 return (EINVAL); 2313 } 2314 2315 return (do_jail_attach(td, pr)); 2316 } 2317 2318 static int 2319 do_jail_attach(struct thread *td, struct prison *pr) 2320 { 2321 struct prison *ppr; 2322 struct proc *p; 2323 struct ucred *newcred, *oldcred; 2324 int vfslocked, error; 2325 2326 /* 2327 * XXX: Note that there is a slight race here if two threads 2328 * in the same privileged process attempt to attach to two 2329 * different jails at the same time. It is important for 2330 * user processes not to do this, or they might end up with 2331 * a process root from one prison, but attached to the jail 2332 * of another. 2333 */ 2334 pr->pr_ref++; 2335 pr->pr_uref++; 2336 mtx_unlock(&pr->pr_mtx); 2337 2338 /* Let modules do whatever they need to prepare for attaching. */ 2339 error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2340 if (error) { 2341 prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2342 return (error); 2343 } 2344 sx_sunlock(&allprison_lock); 2345 2346 /* 2347 * Reparent the newly attached process to this jail. 2348 */ 2349 ppr = td->td_ucred->cr_prison; 2350 p = td->td_proc; 2351 error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2352 if (error) 2353 goto e_revert_osd; 2354 2355 vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2356 vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2357 if ((error = change_dir(pr->pr_root, td)) != 0) 2358 goto e_unlock; 2359 #ifdef MAC 2360 if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2361 goto e_unlock; 2362 #endif 2363 VOP_UNLOCK(pr->pr_root, 0); 2364 if ((error = change_root(pr->pr_root, td))) 2365 goto e_unlock_giant; 2366 VFS_UNLOCK_GIANT(vfslocked); 2367 2368 newcred = crget(); 2369 PROC_LOCK(p); 2370 oldcred = p->p_ucred; 2371 setsugid(p); 2372 crcopy(newcred, oldcred); 2373 newcred->cr_prison = pr; 2374 p->p_ucred = newcred; 2375 PROC_UNLOCK(p); 2376 #ifdef RACCT 2377 racct_proc_ucred_changed(p, oldcred, newcred); 2378 #endif 2379 crfree(oldcred); 2380 prison_deref(ppr, PD_DEREF | PD_DEUREF); 2381 return (0); 2382 e_unlock: 2383 VOP_UNLOCK(pr->pr_root, 0); 2384 e_unlock_giant: 2385 VFS_UNLOCK_GIANT(vfslocked); 2386 e_revert_osd: 2387 /* Tell modules this thread is still in its old jail after all. */ 2388 (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2389 prison_deref(pr, PD_DEREF | PD_DEUREF); 2390 return (error); 2391 } 2392 2393 2394 /* 2395 * Returns a locked prison instance, or NULL on failure. 2396 */ 2397 struct prison * 2398 prison_find(int prid) 2399 { 2400 struct prison *pr; 2401 2402 sx_assert(&allprison_lock, SX_LOCKED); 2403 TAILQ_FOREACH(pr, &allprison, pr_list) { 2404 if (pr->pr_id == prid) { 2405 mtx_lock(&pr->pr_mtx); 2406 if (pr->pr_ref > 0) 2407 return (pr); 2408 mtx_unlock(&pr->pr_mtx); 2409 } 2410 } 2411 return (NULL); 2412 } 2413 2414 /* 2415 * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2416 */ 2417 struct prison * 2418 prison_find_child(struct prison *mypr, int prid) 2419 { 2420 struct prison *pr; 2421 int descend; 2422 2423 sx_assert(&allprison_lock, SX_LOCKED); 2424 FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2425 if (pr->pr_id == prid) { 2426 mtx_lock(&pr->pr_mtx); 2427 if (pr->pr_ref > 0) 2428 return (pr); 2429 mtx_unlock(&pr->pr_mtx); 2430 } 2431 } 2432 return (NULL); 2433 } 2434 2435 /* 2436 * Look for the name relative to mypr. Returns a locked prison or NULL. 2437 */ 2438 struct prison * 2439 prison_find_name(struct prison *mypr, const char *name) 2440 { 2441 struct prison *pr, *deadpr; 2442 size_t mylen; 2443 int descend; 2444 2445 sx_assert(&allprison_lock, SX_LOCKED); 2446 mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2447 again: 2448 deadpr = NULL; 2449 FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2450 if (!strcmp(pr->pr_name + mylen, name)) { 2451 mtx_lock(&pr->pr_mtx); 2452 if (pr->pr_ref > 0) { 2453 if (pr->pr_uref > 0) 2454 return (pr); 2455 deadpr = pr; 2456 } 2457 mtx_unlock(&pr->pr_mtx); 2458 } 2459 } 2460 /* There was no valid prison - perhaps there was a dying one. */ 2461 if (deadpr != NULL) { 2462 mtx_lock(&deadpr->pr_mtx); 2463 if (deadpr->pr_ref == 0) { 2464 mtx_unlock(&deadpr->pr_mtx); 2465 goto again; 2466 } 2467 } 2468 return (deadpr); 2469 } 2470 2471 /* 2472 * See if a prison has the specific flag set. 2473 */ 2474 int 2475 prison_flag(struct ucred *cred, unsigned flag) 2476 { 2477 2478 /* This is an atomic read, so no locking is necessary. */ 2479 return (cred->cr_prison->pr_flags & flag); 2480 } 2481 2482 int 2483 prison_allow(struct ucred *cred, unsigned flag) 2484 { 2485 2486 /* This is an atomic read, so no locking is necessary. */ 2487 return (cred->cr_prison->pr_allow & flag); 2488 } 2489 2490 /* 2491 * Remove a prison reference. If that was the last reference, remove the 2492 * prison itself - but not in this context in case there are locks held. 2493 */ 2494 void 2495 prison_free_locked(struct prison *pr) 2496 { 2497 2498 mtx_assert(&pr->pr_mtx, MA_OWNED); 2499 pr->pr_ref--; 2500 if (pr->pr_ref == 0) { 2501 mtx_unlock(&pr->pr_mtx); 2502 TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2503 taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 2504 return; 2505 } 2506 mtx_unlock(&pr->pr_mtx); 2507 } 2508 2509 void 2510 prison_free(struct prison *pr) 2511 { 2512 2513 mtx_lock(&pr->pr_mtx); 2514 prison_free_locked(pr); 2515 } 2516 2517 static void 2518 prison_complete(void *context, int pending) 2519 { 2520 2521 prison_deref((struct prison *)context, 0); 2522 } 2523 2524 /* 2525 * Remove a prison reference (usually). This internal version assumes no 2526 * mutexes are held, except perhaps the prison itself. If there are no more 2527 * references, release and delist the prison. On completion, the prison lock 2528 * and the allprison lock are both unlocked. 2529 */ 2530 static void 2531 prison_deref(struct prison *pr, int flags) 2532 { 2533 struct prison *ppr, *tpr; 2534 int vfslocked; 2535 2536 if (!(flags & PD_LOCKED)) 2537 mtx_lock(&pr->pr_mtx); 2538 for (;;) { 2539 if (flags & PD_DEUREF) { 2540 pr->pr_uref--; 2541 KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2542 } 2543 if (flags & PD_DEREF) 2544 pr->pr_ref--; 2545 /* If the prison still has references, nothing else to do. */ 2546 if (pr->pr_ref > 0) { 2547 mtx_unlock(&pr->pr_mtx); 2548 if (flags & PD_LIST_SLOCKED) 2549 sx_sunlock(&allprison_lock); 2550 else if (flags & PD_LIST_XLOCKED) 2551 sx_xunlock(&allprison_lock); 2552 return; 2553 } 2554 2555 mtx_unlock(&pr->pr_mtx); 2556 if (flags & PD_LIST_SLOCKED) { 2557 if (!sx_try_upgrade(&allprison_lock)) { 2558 sx_sunlock(&allprison_lock); 2559 sx_xlock(&allprison_lock); 2560 } 2561 } else if (!(flags & PD_LIST_XLOCKED)) 2562 sx_xlock(&allprison_lock); 2563 2564 TAILQ_REMOVE(&allprison, pr, pr_list); 2565 LIST_REMOVE(pr, pr_sibling); 2566 ppr = pr->pr_parent; 2567 for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2568 tpr->pr_childcount--; 2569 sx_xunlock(&allprison_lock); 2570 2571 #ifdef VIMAGE 2572 if (pr->pr_vnet != ppr->pr_vnet) 2573 vnet_destroy(pr->pr_vnet); 2574 #endif 2575 if (pr->pr_root != NULL) { 2576 vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2577 vrele(pr->pr_root); 2578 VFS_UNLOCK_GIANT(vfslocked); 2579 } 2580 mtx_destroy(&pr->pr_mtx); 2581 #ifdef INET 2582 free(pr->pr_ip4, M_PRISON); 2583 #endif 2584 #ifdef INET6 2585 free(pr->pr_ip6, M_PRISON); 2586 #endif 2587 if (pr->pr_cpuset != NULL) 2588 cpuset_rel(pr->pr_cpuset); 2589 osd_jail_exit(pr); 2590 #ifdef RACCT 2591 prison_racct_detach(pr); 2592 #endif 2593 free(pr, M_PRISON); 2594 2595 /* Removing a prison frees a reference on its parent. */ 2596 pr = ppr; 2597 mtx_lock(&pr->pr_mtx); 2598 flags = PD_DEREF | PD_DEUREF; 2599 } 2600 } 2601 2602 void 2603 prison_hold_locked(struct prison *pr) 2604 { 2605 2606 mtx_assert(&pr->pr_mtx, MA_OWNED); 2607 KASSERT(pr->pr_ref > 0, 2608 ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 2609 pr->pr_ref++; 2610 } 2611 2612 void 2613 prison_hold(struct prison *pr) 2614 { 2615 2616 mtx_lock(&pr->pr_mtx); 2617 prison_hold_locked(pr); 2618 mtx_unlock(&pr->pr_mtx); 2619 } 2620 2621 void 2622 prison_proc_hold(struct prison *pr) 2623 { 2624 2625 mtx_lock(&pr->pr_mtx); 2626 KASSERT(pr->pr_uref > 0, 2627 ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2628 pr->pr_uref++; 2629 mtx_unlock(&pr->pr_mtx); 2630 } 2631 2632 void 2633 prison_proc_free(struct prison *pr) 2634 { 2635 2636 mtx_lock(&pr->pr_mtx); 2637 KASSERT(pr->pr_uref > 0, 2638 ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2639 prison_deref(pr, PD_DEUREF | PD_LOCKED); 2640 } 2641 2642 2643 #ifdef INET 2644 /* 2645 * Restrict a prison's IP address list with its parent's, possibly replacing 2646 * it. Return true if the replacement buffer was used (or would have been). 2647 */ 2648 static int 2649 prison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2650 { 2651 int ii, ij, used; 2652 struct prison *ppr; 2653 2654 ppr = pr->pr_parent; 2655 if (!(pr->pr_flags & PR_IP4_USER)) { 2656 /* This has no user settings, so just copy the parent's list. */ 2657 if (pr->pr_ip4s < ppr->pr_ip4s) { 2658 /* 2659 * There's no room for the parent's list. Use the 2660 * new list buffer, which is assumed to be big enough 2661 * (if it was passed). If there's no buffer, try to 2662 * allocate one. 2663 */ 2664 used = 1; 2665 if (newip4 == NULL) { 2666 newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2667 M_PRISON, M_NOWAIT); 2668 if (newip4 != NULL) 2669 used = 0; 2670 } 2671 if (newip4 != NULL) { 2672 bcopy(ppr->pr_ip4, newip4, 2673 ppr->pr_ip4s * sizeof(*newip4)); 2674 free(pr->pr_ip4, M_PRISON); 2675 pr->pr_ip4 = newip4; 2676 pr->pr_ip4s = ppr->pr_ip4s; 2677 } 2678 return (used); 2679 } 2680 pr->pr_ip4s = ppr->pr_ip4s; 2681 if (pr->pr_ip4s > 0) 2682 bcopy(ppr->pr_ip4, pr->pr_ip4, 2683 pr->pr_ip4s * sizeof(*newip4)); 2684 else if (pr->pr_ip4 != NULL) { 2685 free(pr->pr_ip4, M_PRISON); 2686 pr->pr_ip4 = NULL; 2687 } 2688 } else if (pr->pr_ip4s > 0) { 2689 /* Remove addresses that aren't in the parent. */ 2690 for (ij = 0; ij < ppr->pr_ip4s; ij++) 2691 if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2692 break; 2693 if (ij < ppr->pr_ip4s) 2694 ii = 1; 2695 else { 2696 bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2697 --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2698 ii = 0; 2699 } 2700 for (ij = 1; ii < pr->pr_ip4s; ) { 2701 if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2702 ii++; 2703 continue; 2704 } 2705 switch (ij >= ppr->pr_ip4s ? -1 : 2706 qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2707 case -1: 2708 bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2709 (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2710 break; 2711 case 0: 2712 ii++; 2713 ij++; 2714 break; 2715 case 1: 2716 ij++; 2717 break; 2718 } 2719 } 2720 if (pr->pr_ip4s == 0) { 2721 pr->pr_flags |= PR_IP4_DISABLE; 2722 free(pr->pr_ip4, M_PRISON); 2723 pr->pr_ip4 = NULL; 2724 } 2725 } 2726 return (0); 2727 } 2728 2729 /* 2730 * Pass back primary IPv4 address of this jail. 2731 * 2732 * If not restricted return success but do not alter the address. Caller has 2733 * to make sure to initialize it correctly (e.g. INADDR_ANY). 2734 * 2735 * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2736 * Address returned in NBO. 2737 */ 2738 int 2739 prison_get_ip4(struct ucred *cred, struct in_addr *ia) 2740 { 2741 struct prison *pr; 2742 2743 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2744 KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2745 2746 pr = cred->cr_prison; 2747 if (!(pr->pr_flags & PR_IP4)) 2748 return (0); 2749 mtx_lock(&pr->pr_mtx); 2750 if (!(pr->pr_flags & PR_IP4)) { 2751 mtx_unlock(&pr->pr_mtx); 2752 return (0); 2753 } 2754 if (pr->pr_ip4 == NULL) { 2755 mtx_unlock(&pr->pr_mtx); 2756 return (EAFNOSUPPORT); 2757 } 2758 2759 ia->s_addr = pr->pr_ip4[0].s_addr; 2760 mtx_unlock(&pr->pr_mtx); 2761 return (0); 2762 } 2763 2764 /* 2765 * Return 1 if we should do proper source address selection or are not jailed. 2766 * We will return 0 if we should bypass source address selection in favour 2767 * of the primary jail IPv4 address. Only in this case *ia will be updated and 2768 * returned in NBO. 2769 * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2770 */ 2771 int 2772 prison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2773 { 2774 struct prison *pr; 2775 struct in_addr lia; 2776 int error; 2777 2778 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2779 KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2780 2781 if (!jailed(cred)) 2782 return (1); 2783 2784 pr = cred->cr_prison; 2785 if (pr->pr_flags & PR_IP4_SADDRSEL) 2786 return (1); 2787 2788 lia.s_addr = INADDR_ANY; 2789 error = prison_get_ip4(cred, &lia); 2790 if (error) 2791 return (error); 2792 if (lia.s_addr == INADDR_ANY) 2793 return (1); 2794 2795 ia->s_addr = lia.s_addr; 2796 return (0); 2797 } 2798 2799 /* 2800 * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2801 */ 2802 int 2803 prison_equal_ip4(struct prison *pr1, struct prison *pr2) 2804 { 2805 2806 if (pr1 == pr2) 2807 return (1); 2808 2809 /* 2810 * No need to lock since the PR_IP4_USER flag can't be altered for 2811 * existing prisons. 2812 */ 2813 while (pr1 != &prison0 && 2814 #ifdef VIMAGE 2815 !(pr1->pr_flags & PR_VNET) && 2816 #endif 2817 !(pr1->pr_flags & PR_IP4_USER)) 2818 pr1 = pr1->pr_parent; 2819 while (pr2 != &prison0 && 2820 #ifdef VIMAGE 2821 !(pr2->pr_flags & PR_VNET) && 2822 #endif 2823 !(pr2->pr_flags & PR_IP4_USER)) 2824 pr2 = pr2->pr_parent; 2825 return (pr1 == pr2); 2826 } 2827 2828 /* 2829 * Make sure our (source) address is set to something meaningful to this 2830 * jail. 2831 * 2832 * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2833 * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2834 * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2835 */ 2836 int 2837 prison_local_ip4(struct ucred *cred, struct in_addr *ia) 2838 { 2839 struct prison *pr; 2840 struct in_addr ia0; 2841 int error; 2842 2843 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2844 KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2845 2846 pr = cred->cr_prison; 2847 if (!(pr->pr_flags & PR_IP4)) 2848 return (0); 2849 mtx_lock(&pr->pr_mtx); 2850 if (!(pr->pr_flags & PR_IP4)) { 2851 mtx_unlock(&pr->pr_mtx); 2852 return (0); 2853 } 2854 if (pr->pr_ip4 == NULL) { 2855 mtx_unlock(&pr->pr_mtx); 2856 return (EAFNOSUPPORT); 2857 } 2858 2859 ia0.s_addr = ntohl(ia->s_addr); 2860 if (ia0.s_addr == INADDR_LOOPBACK) { 2861 ia->s_addr = pr->pr_ip4[0].s_addr; 2862 mtx_unlock(&pr->pr_mtx); 2863 return (0); 2864 } 2865 2866 if (ia0.s_addr == INADDR_ANY) { 2867 /* 2868 * In case there is only 1 IPv4 address, bind directly. 2869 */ 2870 if (pr->pr_ip4s == 1) 2871 ia->s_addr = pr->pr_ip4[0].s_addr; 2872 mtx_unlock(&pr->pr_mtx); 2873 return (0); 2874 } 2875 2876 error = _prison_check_ip4(pr, ia); 2877 mtx_unlock(&pr->pr_mtx); 2878 return (error); 2879 } 2880 2881 /* 2882 * Rewrite destination address in case we will connect to loopback address. 2883 * 2884 * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2885 * Address passed in in NBO and returned in NBO. 2886 */ 2887 int 2888 prison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2889 { 2890 struct prison *pr; 2891 2892 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2893 KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2894 2895 pr = cred->cr_prison; 2896 if (!(pr->pr_flags & PR_IP4)) 2897 return (0); 2898 mtx_lock(&pr->pr_mtx); 2899 if (!(pr->pr_flags & PR_IP4)) { 2900 mtx_unlock(&pr->pr_mtx); 2901 return (0); 2902 } 2903 if (pr->pr_ip4 == NULL) { 2904 mtx_unlock(&pr->pr_mtx); 2905 return (EAFNOSUPPORT); 2906 } 2907 2908 if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2909 ia->s_addr = pr->pr_ip4[0].s_addr; 2910 mtx_unlock(&pr->pr_mtx); 2911 return (0); 2912 } 2913 2914 /* 2915 * Return success because nothing had to be changed. 2916 */ 2917 mtx_unlock(&pr->pr_mtx); 2918 return (0); 2919 } 2920 2921 /* 2922 * Check if given address belongs to the jail referenced by cred/prison. 2923 * 2924 * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2925 * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2926 * doesn't allow IPv4. Address passed in in NBO. 2927 */ 2928 static int 2929 _prison_check_ip4(struct prison *pr, struct in_addr *ia) 2930 { 2931 int i, a, z, d; 2932 2933 /* 2934 * Check the primary IP. 2935 */ 2936 if (pr->pr_ip4[0].s_addr == ia->s_addr) 2937 return (0); 2938 2939 /* 2940 * All the other IPs are sorted so we can do a binary search. 2941 */ 2942 a = 0; 2943 z = pr->pr_ip4s - 2; 2944 while (a <= z) { 2945 i = (a + z) / 2; 2946 d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2947 if (d > 0) 2948 z = i - 1; 2949 else if (d < 0) 2950 a = i + 1; 2951 else 2952 return (0); 2953 } 2954 2955 return (EADDRNOTAVAIL); 2956 } 2957 2958 int 2959 prison_check_ip4(struct ucred *cred, struct in_addr *ia) 2960 { 2961 struct prison *pr; 2962 int error; 2963 2964 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2965 KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2966 2967 pr = cred->cr_prison; 2968 if (!(pr->pr_flags & PR_IP4)) 2969 return (0); 2970 mtx_lock(&pr->pr_mtx); 2971 if (!(pr->pr_flags & PR_IP4)) { 2972 mtx_unlock(&pr->pr_mtx); 2973 return (0); 2974 } 2975 if (pr->pr_ip4 == NULL) { 2976 mtx_unlock(&pr->pr_mtx); 2977 return (EAFNOSUPPORT); 2978 } 2979 2980 error = _prison_check_ip4(pr, ia); 2981 mtx_unlock(&pr->pr_mtx); 2982 return (error); 2983 } 2984 #endif 2985 2986 #ifdef INET6 2987 static int 2988 prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2989 { 2990 int ii, ij, used; 2991 struct prison *ppr; 2992 2993 ppr = pr->pr_parent; 2994 if (!(pr->pr_flags & PR_IP6_USER)) { 2995 /* This has no user settings, so just copy the parent's list. */ 2996 if (pr->pr_ip6s < ppr->pr_ip6s) { 2997 /* 2998 * There's no room for the parent's list. Use the 2999 * new list buffer, which is assumed to be big enough 3000 * (if it was passed). If there's no buffer, try to 3001 * allocate one. 3002 */ 3003 used = 1; 3004 if (newip6 == NULL) { 3005 newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 3006 M_PRISON, M_NOWAIT); 3007 if (newip6 != NULL) 3008 used = 0; 3009 } 3010 if (newip6 != NULL) { 3011 bcopy(ppr->pr_ip6, newip6, 3012 ppr->pr_ip6s * sizeof(*newip6)); 3013 free(pr->pr_ip6, M_PRISON); 3014 pr->pr_ip6 = newip6; 3015 pr->pr_ip6s = ppr->pr_ip6s; 3016 } 3017 return (used); 3018 } 3019 pr->pr_ip6s = ppr->pr_ip6s; 3020 if (pr->pr_ip6s > 0) 3021 bcopy(ppr->pr_ip6, pr->pr_ip6, 3022 pr->pr_ip6s * sizeof(*newip6)); 3023 else if (pr->pr_ip6 != NULL) { 3024 free(pr->pr_ip6, M_PRISON); 3025 pr->pr_ip6 = NULL; 3026 } 3027 } else if (pr->pr_ip6s > 0) { 3028 /* Remove addresses that aren't in the parent. */ 3029 for (ij = 0; ij < ppr->pr_ip6s; ij++) 3030 if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 3031 &ppr->pr_ip6[ij])) 3032 break; 3033 if (ij < ppr->pr_ip6s) 3034 ii = 1; 3035 else { 3036 bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 3037 --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 3038 ii = 0; 3039 } 3040 for (ij = 1; ii < pr->pr_ip6s; ) { 3041 if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 3042 &ppr->pr_ip6[0])) { 3043 ii++; 3044 continue; 3045 } 3046 switch (ij >= ppr->pr_ip4s ? -1 : 3047 qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3048 case -1: 3049 bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3050 (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3051 break; 3052 case 0: 3053 ii++; 3054 ij++; 3055 break; 3056 case 1: 3057 ij++; 3058 break; 3059 } 3060 } 3061 if (pr->pr_ip6s == 0) { 3062 pr->pr_flags |= PR_IP6_DISABLE; 3063 free(pr->pr_ip6, M_PRISON); 3064 pr->pr_ip6 = NULL; 3065 } 3066 } 3067 return 0; 3068 } 3069 3070 /* 3071 * Pass back primary IPv6 address for this jail. 3072 * 3073 * If not restricted return success but do not alter the address. Caller has 3074 * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3075 * 3076 * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3077 */ 3078 int 3079 prison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3080 { 3081 struct prison *pr; 3082 3083 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3084 KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3085 3086 pr = cred->cr_prison; 3087 if (!(pr->pr_flags & PR_IP6)) 3088 return (0); 3089 mtx_lock(&pr->pr_mtx); 3090 if (!(pr->pr_flags & PR_IP6)) { 3091 mtx_unlock(&pr->pr_mtx); 3092 return (0); 3093 } 3094 if (pr->pr_ip6 == NULL) { 3095 mtx_unlock(&pr->pr_mtx); 3096 return (EAFNOSUPPORT); 3097 } 3098 3099 bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3100 mtx_unlock(&pr->pr_mtx); 3101 return (0); 3102 } 3103 3104 /* 3105 * Return 1 if we should do proper source address selection or are not jailed. 3106 * We will return 0 if we should bypass source address selection in favour 3107 * of the primary jail IPv6 address. Only in this case *ia will be updated and 3108 * returned in NBO. 3109 * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3110 */ 3111 int 3112 prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3113 { 3114 struct prison *pr; 3115 struct in6_addr lia6; 3116 int error; 3117 3118 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3119 KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3120 3121 if (!jailed(cred)) 3122 return (1); 3123 3124 pr = cred->cr_prison; 3125 if (pr->pr_flags & PR_IP6_SADDRSEL) 3126 return (1); 3127 3128 lia6 = in6addr_any; 3129 error = prison_get_ip6(cred, &lia6); 3130 if (error) 3131 return (error); 3132 if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3133 return (1); 3134 3135 bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3136 return (0); 3137 } 3138 3139 /* 3140 * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3141 */ 3142 int 3143 prison_equal_ip6(struct prison *pr1, struct prison *pr2) 3144 { 3145 3146 if (pr1 == pr2) 3147 return (1); 3148 3149 while (pr1 != &prison0 && 3150 #ifdef VIMAGE 3151 !(pr1->pr_flags & PR_VNET) && 3152 #endif 3153 !(pr1->pr_flags & PR_IP6_USER)) 3154 pr1 = pr1->pr_parent; 3155 while (pr2 != &prison0 && 3156 #ifdef VIMAGE 3157 !(pr2->pr_flags & PR_VNET) && 3158 #endif 3159 !(pr2->pr_flags & PR_IP6_USER)) 3160 pr2 = pr2->pr_parent; 3161 return (pr1 == pr2); 3162 } 3163 3164 /* 3165 * Make sure our (source) address is set to something meaningful to this jail. 3166 * 3167 * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3168 * when needed while binding. 3169 * 3170 * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3171 * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3172 * doesn't allow IPv6. 3173 */ 3174 int 3175 prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3176 { 3177 struct prison *pr; 3178 int error; 3179 3180 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3181 KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3182 3183 pr = cred->cr_prison; 3184 if (!(pr->pr_flags & PR_IP6)) 3185 return (0); 3186 mtx_lock(&pr->pr_mtx); 3187 if (!(pr->pr_flags & PR_IP6)) { 3188 mtx_unlock(&pr->pr_mtx); 3189 return (0); 3190 } 3191 if (pr->pr_ip6 == NULL) { 3192 mtx_unlock(&pr->pr_mtx); 3193 return (EAFNOSUPPORT); 3194 } 3195 3196 if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3197 bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3198 mtx_unlock(&pr->pr_mtx); 3199 return (0); 3200 } 3201 3202 if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3203 /* 3204 * In case there is only 1 IPv6 address, and v6only is true, 3205 * then bind directly. 3206 */ 3207 if (v6only != 0 && pr->pr_ip6s == 1) 3208 bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3209 mtx_unlock(&pr->pr_mtx); 3210 return (0); 3211 } 3212 3213 error = _prison_check_ip6(pr, ia6); 3214 mtx_unlock(&pr->pr_mtx); 3215 return (error); 3216 } 3217 3218 /* 3219 * Rewrite destination address in case we will connect to loopback address. 3220 * 3221 * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3222 */ 3223 int 3224 prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3225 { 3226 struct prison *pr; 3227 3228 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3229 KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3230 3231 pr = cred->cr_prison; 3232 if (!(pr->pr_flags & PR_IP6)) 3233 return (0); 3234 mtx_lock(&pr->pr_mtx); 3235 if (!(pr->pr_flags & PR_IP6)) { 3236 mtx_unlock(&pr->pr_mtx); 3237 return (0); 3238 } 3239 if (pr->pr_ip6 == NULL) { 3240 mtx_unlock(&pr->pr_mtx); 3241 return (EAFNOSUPPORT); 3242 } 3243 3244 if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3245 bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3246 mtx_unlock(&pr->pr_mtx); 3247 return (0); 3248 } 3249 3250 /* 3251 * Return success because nothing had to be changed. 3252 */ 3253 mtx_unlock(&pr->pr_mtx); 3254 return (0); 3255 } 3256 3257 /* 3258 * Check if given address belongs to the jail referenced by cred/prison. 3259 * 3260 * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3261 * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3262 * doesn't allow IPv6. 3263 */ 3264 static int 3265 _prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 3266 { 3267 int i, a, z, d; 3268 3269 /* 3270 * Check the primary IP. 3271 */ 3272 if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3273 return (0); 3274 3275 /* 3276 * All the other IPs are sorted so we can do a binary search. 3277 */ 3278 a = 0; 3279 z = pr->pr_ip6s - 2; 3280 while (a <= z) { 3281 i = (a + z) / 2; 3282 d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3283 if (d > 0) 3284 z = i - 1; 3285 else if (d < 0) 3286 a = i + 1; 3287 else 3288 return (0); 3289 } 3290 3291 return (EADDRNOTAVAIL); 3292 } 3293 3294 int 3295 prison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3296 { 3297 struct prison *pr; 3298 int error; 3299 3300 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3301 KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3302 3303 pr = cred->cr_prison; 3304 if (!(pr->pr_flags & PR_IP6)) 3305 return (0); 3306 mtx_lock(&pr->pr_mtx); 3307 if (!(pr->pr_flags & PR_IP6)) { 3308 mtx_unlock(&pr->pr_mtx); 3309 return (0); 3310 } 3311 if (pr->pr_ip6 == NULL) { 3312 mtx_unlock(&pr->pr_mtx); 3313 return (EAFNOSUPPORT); 3314 } 3315 3316 error = _prison_check_ip6(pr, ia6); 3317 mtx_unlock(&pr->pr_mtx); 3318 return (error); 3319 } 3320 #endif 3321 3322 /* 3323 * Check if a jail supports the given address family. 3324 * 3325 * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3326 * if not. 3327 */ 3328 int 3329 prison_check_af(struct ucred *cred, int af) 3330 { 3331 struct prison *pr; 3332 int error; 3333 3334 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3335 3336 pr = cred->cr_prison; 3337 #ifdef VIMAGE 3338 /* Prisons with their own network stack are not limited. */ 3339 if (prison_owns_vnet(cred)) 3340 return (0); 3341 #endif 3342 3343 error = 0; 3344 switch (af) 3345 { 3346 #ifdef INET 3347 case AF_INET: 3348 if (pr->pr_flags & PR_IP4) 3349 { 3350 mtx_lock(&pr->pr_mtx); 3351 if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3352 error = EAFNOSUPPORT; 3353 mtx_unlock(&pr->pr_mtx); 3354 } 3355 break; 3356 #endif 3357 #ifdef INET6 3358 case AF_INET6: 3359 if (pr->pr_flags & PR_IP6) 3360 { 3361 mtx_lock(&pr->pr_mtx); 3362 if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3363 error = EAFNOSUPPORT; 3364 mtx_unlock(&pr->pr_mtx); 3365 } 3366 break; 3367 #endif 3368 case AF_LOCAL: 3369 case AF_ROUTE: 3370 break; 3371 default: 3372 if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3373 error = EAFNOSUPPORT; 3374 } 3375 return (error); 3376 } 3377 3378 /* 3379 * Check if given address belongs to the jail referenced by cred (wrapper to 3380 * prison_check_ip[46]). 3381 * 3382 * Returns 0 if jail doesn't restrict the address family or if address belongs 3383 * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3384 * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3385 */ 3386 int 3387 prison_if(struct ucred *cred, struct sockaddr *sa) 3388 { 3389 #ifdef INET 3390 struct sockaddr_in *sai; 3391 #endif 3392 #ifdef INET6 3393 struct sockaddr_in6 *sai6; 3394 #endif 3395 int error; 3396 3397 KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3398 KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3399 3400 #ifdef VIMAGE 3401 if (prison_owns_vnet(cred)) 3402 return (0); 3403 #endif 3404 3405 error = 0; 3406 switch (sa->sa_family) 3407 { 3408 #ifdef INET 3409 case AF_INET: 3410 sai = (struct sockaddr_in *)sa; 3411 error = prison_check_ip4(cred, &sai->sin_addr); 3412 break; 3413 #endif 3414 #ifdef INET6 3415 case AF_INET6: 3416 sai6 = (struct sockaddr_in6 *)sa; 3417 error = prison_check_ip6(cred, &sai6->sin6_addr); 3418 break; 3419 #endif 3420 default: 3421 if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3422 error = EAFNOSUPPORT; 3423 } 3424 return (error); 3425 } 3426 3427 /* 3428 * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 3429 */ 3430 int 3431 prison_check(struct ucred *cred1, struct ucred *cred2) 3432 { 3433 3434 return ((cred1->cr_prison == cred2->cr_prison || 3435 prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3436 } 3437 3438 /* 3439 * Return 1 if p2 is a child of p1, otherwise 0. 3440 */ 3441 int 3442 prison_ischild(struct prison *pr1, struct prison *pr2) 3443 { 3444 3445 for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3446 if (pr1 == pr2) 3447 return (1); 3448 return (0); 3449 } 3450 3451 /* 3452 * Return 1 if the passed credential is in a jail, otherwise 0. 3453 */ 3454 int 3455 jailed(struct ucred *cred) 3456 { 3457 3458 return (cred->cr_prison != &prison0); 3459 } 3460 3461 /* 3462 * Return 1 if the passed credential is in a jail and that jail does not 3463 * have its own virtual network stack, otherwise 0. 3464 */ 3465 int 3466 jailed_without_vnet(struct ucred *cred) 3467 { 3468 3469 if (!jailed(cred)) 3470 return (0); 3471 #ifdef VIMAGE 3472 if (prison_owns_vnet(cred)) 3473 return (0); 3474 #endif 3475 3476 return (1); 3477 } 3478 3479 /* 3480 * Return the correct hostname (domainname, et al) for the passed credential. 3481 */ 3482 void 3483 getcredhostname(struct ucred *cred, char *buf, size_t size) 3484 { 3485 struct prison *pr; 3486 3487 /* 3488 * A NULL credential can be used to shortcut to the physical 3489 * system's hostname. 3490 */ 3491 pr = (cred != NULL) ? cred->cr_prison : &prison0; 3492 mtx_lock(&pr->pr_mtx); 3493 strlcpy(buf, pr->pr_hostname, size); 3494 mtx_unlock(&pr->pr_mtx); 3495 } 3496 3497 void 3498 getcreddomainname(struct ucred *cred, char *buf, size_t size) 3499 { 3500 3501 mtx_lock(&cred->cr_prison->pr_mtx); 3502 strlcpy(buf, cred->cr_prison->pr_domainname, size); 3503 mtx_unlock(&cred->cr_prison->pr_mtx); 3504 } 3505 3506 void 3507 getcredhostuuid(struct ucred *cred, char *buf, size_t size) 3508 { 3509 3510 mtx_lock(&cred->cr_prison->pr_mtx); 3511 strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3512 mtx_unlock(&cred->cr_prison->pr_mtx); 3513 } 3514 3515 void 3516 getcredhostid(struct ucred *cred, unsigned long *hostid) 3517 { 3518 3519 mtx_lock(&cred->cr_prison->pr_mtx); 3520 *hostid = cred->cr_prison->pr_hostid; 3521 mtx_unlock(&cred->cr_prison->pr_mtx); 3522 } 3523 3524 #ifdef VIMAGE 3525 /* 3526 * Determine whether the prison represented by cred owns 3527 * its vnet rather than having it inherited. 3528 * 3529 * Returns 1 in case the prison owns the vnet, 0 otherwise. 3530 */ 3531 int 3532 prison_owns_vnet(struct ucred *cred) 3533 { 3534 3535 /* 3536 * vnets cannot be added/removed after jail creation, 3537 * so no need to lock here. 3538 */ 3539 return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3540 } 3541 #endif 3542 3543 /* 3544 * Determine whether the subject represented by cred can "see" 3545 * status of a mount point. 3546 * Returns: 0 for permitted, ENOENT otherwise. 3547 * XXX: This function should be called cr_canseemount() and should be 3548 * placed in kern_prot.c. 3549 */ 3550 int 3551 prison_canseemount(struct ucred *cred, struct mount *mp) 3552 { 3553 struct prison *pr; 3554 struct statfs *sp; 3555 size_t len; 3556 3557 pr = cred->cr_prison; 3558 if (pr->pr_enforce_statfs == 0) 3559 return (0); 3560 if (pr->pr_root->v_mount == mp) 3561 return (0); 3562 if (pr->pr_enforce_statfs == 2) 3563 return (ENOENT); 3564 /* 3565 * If jail's chroot directory is set to "/" we should be able to see 3566 * all mount-points from inside a jail. 3567 * This is ugly check, but this is the only situation when jail's 3568 * directory ends with '/'. 3569 */ 3570 if (strcmp(pr->pr_path, "/") == 0) 3571 return (0); 3572 len = strlen(pr->pr_path); 3573 sp = &mp->mnt_stat; 3574 if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3575 return (ENOENT); 3576 /* 3577 * Be sure that we don't have situation where jail's root directory 3578 * is "/some/path" and mount point is "/some/pathpath". 3579 */ 3580 if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3581 return (ENOENT); 3582 return (0); 3583 } 3584 3585 void 3586 prison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3587 { 3588 char jpath[MAXPATHLEN]; 3589 struct prison *pr; 3590 size_t len; 3591 3592 pr = cred->cr_prison; 3593 if (pr->pr_enforce_statfs == 0) 3594 return; 3595 if (prison_canseemount(cred, mp) != 0) { 3596 bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3597 strlcpy(sp->f_mntonname, "[restricted]", 3598 sizeof(sp->f_mntonname)); 3599 return; 3600 } 3601 if (pr->pr_root->v_mount == mp) { 3602 /* 3603 * Clear current buffer data, so we are sure nothing from 3604 * the valid path left there. 3605 */ 3606 bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3607 *sp->f_mntonname = '/'; 3608 return; 3609 } 3610 /* 3611 * If jail's chroot directory is set to "/" we should be able to see 3612 * all mount-points from inside a jail. 3613 */ 3614 if (strcmp(pr->pr_path, "/") == 0) 3615 return; 3616 len = strlen(pr->pr_path); 3617 strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3618 /* 3619 * Clear current buffer data, so we are sure nothing from 3620 * the valid path left there. 3621 */ 3622 bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3623 if (*jpath == '\0') { 3624 /* Should never happen. */ 3625 *sp->f_mntonname = '/'; 3626 } else { 3627 strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3628 } 3629 } 3630 3631 /* 3632 * Check with permission for a specific privilege is granted within jail. We 3633 * have a specific list of accepted privileges; the rest are denied. 3634 */ 3635 int 3636 prison_priv_check(struct ucred *cred, int priv) 3637 { 3638 3639 if (!jailed(cred)) 3640 return (0); 3641 3642 #ifdef VIMAGE 3643 /* 3644 * Privileges specific to prisons with a virtual network stack. 3645 * There might be a duplicate entry here in case the privilege 3646 * is only granted conditionally in the legacy jail case. 3647 */ 3648 switch (priv) { 3649 #ifdef notyet 3650 /* 3651 * NFS-specific privileges. 3652 */ 3653 case PRIV_NFS_DAEMON: 3654 case PRIV_NFS_LOCKD: 3655 #endif 3656 /* 3657 * Network stack privileges. 3658 */ 3659 case PRIV_NET_BRIDGE: 3660 case PRIV_NET_GRE: 3661 case PRIV_NET_BPF: 3662 case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3663 case PRIV_NET_ROUTE: 3664 case PRIV_NET_TAP: 3665 case PRIV_NET_SETIFMTU: 3666 case PRIV_NET_SETIFFLAGS: 3667 case PRIV_NET_SETIFCAP: 3668 case PRIV_NET_SETIFDESCR: 3669 case PRIV_NET_SETIFNAME : 3670 case PRIV_NET_SETIFMETRIC: 3671 case PRIV_NET_SETIFPHYS: 3672 case PRIV_NET_SETIFMAC: 3673 case PRIV_NET_ADDMULTI: 3674 case PRIV_NET_DELMULTI: 3675 case PRIV_NET_HWIOCTL: 3676 case PRIV_NET_SETLLADDR: 3677 case PRIV_NET_ADDIFGROUP: 3678 case PRIV_NET_DELIFGROUP: 3679 case PRIV_NET_IFCREATE: 3680 case PRIV_NET_IFDESTROY: 3681 case PRIV_NET_ADDIFADDR: 3682 case PRIV_NET_DELIFADDR: 3683 case PRIV_NET_LAGG: 3684 case PRIV_NET_GIF: 3685 case PRIV_NET_SETIFVNET: 3686 case PRIV_NET_SETIFFIB: 3687 3688 /* 3689 * 802.11-related privileges. 3690 */ 3691 case PRIV_NET80211_GETKEY: 3692 #ifdef notyet 3693 case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3694 #endif 3695 3696 #ifdef notyet 3697 /* 3698 * AppleTalk privileges. 3699 */ 3700 case PRIV_NETATALK_RESERVEDPORT: 3701 3702 /* 3703 * ATM privileges. 3704 */ 3705 case PRIV_NETATM_CFG: 3706 case PRIV_NETATM_ADD: 3707 case PRIV_NETATM_DEL: 3708 case PRIV_NETATM_SET: 3709 3710 /* 3711 * Bluetooth privileges. 3712 */ 3713 case PRIV_NETBLUETOOTH_RAW: 3714 #endif 3715 3716 /* 3717 * Netgraph and netgraph module privileges. 3718 */ 3719 case PRIV_NETGRAPH_CONTROL: 3720 #ifdef notyet 3721 case PRIV_NETGRAPH_TTY: 3722 #endif 3723 3724 /* 3725 * IPv4 and IPv6 privileges. 3726 */ 3727 case PRIV_NETINET_IPFW: 3728 case PRIV_NETINET_DIVERT: 3729 case PRIV_NETINET_PF: 3730 case PRIV_NETINET_DUMMYNET: 3731 case PRIV_NETINET_CARP: 3732 case PRIV_NETINET_MROUTE: 3733 case PRIV_NETINET_RAW: 3734 case PRIV_NETINET_ADDRCTRL6: 3735 case PRIV_NETINET_ND6: 3736 case PRIV_NETINET_SCOPE6: 3737 case PRIV_NETINET_ALIFETIME6: 3738 case PRIV_NETINET_IPSEC: 3739 case PRIV_NETINET_BINDANY: 3740 3741 #ifdef notyet 3742 /* 3743 * IPX/SPX privileges. 3744 */ 3745 case PRIV_NETIPX_RESERVEDPORT: 3746 case PRIV_NETIPX_RAW: 3747 3748 /* 3749 * NCP privileges. 3750 */ 3751 case PRIV_NETNCP: 3752 3753 /* 3754 * SMB privileges. 3755 */ 3756 case PRIV_NETSMB: 3757 #endif 3758 3759 /* 3760 * No default: or deny here. 3761 * In case of no permit fall through to next switch(). 3762 */ 3763 if (cred->cr_prison->pr_flags & PR_VNET) 3764 return (0); 3765 } 3766 #endif /* VIMAGE */ 3767 3768 switch (priv) { 3769 3770 /* 3771 * Allow ktrace privileges for root in jail. 3772 */ 3773 case PRIV_KTRACE: 3774 3775 #if 0 3776 /* 3777 * Allow jailed processes to configure audit identity and 3778 * submit audit records (login, etc). In the future we may 3779 * want to further refine the relationship between audit and 3780 * jail. 3781 */ 3782 case PRIV_AUDIT_GETAUDIT: 3783 case PRIV_AUDIT_SETAUDIT: 3784 case PRIV_AUDIT_SUBMIT: 3785 #endif 3786 3787 /* 3788 * Allow jailed processes to manipulate process UNIX 3789 * credentials in any way they see fit. 3790 */ 3791 case PRIV_CRED_SETUID: 3792 case PRIV_CRED_SETEUID: 3793 case PRIV_CRED_SETGID: 3794 case PRIV_CRED_SETEGID: 3795 case PRIV_CRED_SETGROUPS: 3796 case PRIV_CRED_SETREUID: 3797 case PRIV_CRED_SETREGID: 3798 case PRIV_CRED_SETRESUID: 3799 case PRIV_CRED_SETRESGID: 3800 3801 /* 3802 * Jail implements visibility constraints already, so allow 3803 * jailed root to override uid/gid-based constraints. 3804 */ 3805 case PRIV_SEEOTHERGIDS: 3806 case PRIV_SEEOTHERUIDS: 3807 3808 /* 3809 * Jail implements inter-process debugging limits already, so 3810 * allow jailed root various debugging privileges. 3811 */ 3812 case PRIV_DEBUG_DIFFCRED: 3813 case PRIV_DEBUG_SUGID: 3814 case PRIV_DEBUG_UNPRIV: 3815 3816 /* 3817 * Allow jail to set various resource limits and login 3818 * properties, and for now, exceed process resource limits. 3819 */ 3820 case PRIV_PROC_LIMIT: 3821 case PRIV_PROC_SETLOGIN: 3822 case PRIV_PROC_SETRLIMIT: 3823 3824 /* 3825 * System V and POSIX IPC privileges are granted in jail. 3826 */ 3827 case PRIV_IPC_READ: 3828 case PRIV_IPC_WRITE: 3829 case PRIV_IPC_ADMIN: 3830 case PRIV_IPC_MSGSIZE: 3831 case PRIV_MQ_ADMIN: 3832 3833 /* 3834 * Jail operations within a jail work on child jails. 3835 */ 3836 case PRIV_JAIL_ATTACH: 3837 case PRIV_JAIL_SET: 3838 case PRIV_JAIL_REMOVE: 3839 3840 /* 3841 * Jail implements its own inter-process limits, so allow 3842 * root processes in jail to change scheduling on other 3843 * processes in the same jail. Likewise for signalling. 3844 */ 3845 case PRIV_SCHED_DIFFCRED: 3846 case PRIV_SCHED_CPUSET: 3847 case PRIV_SIGNAL_DIFFCRED: 3848 case PRIV_SIGNAL_SUGID: 3849 3850 /* 3851 * Allow jailed processes to write to sysctls marked as jail 3852 * writable. 3853 */ 3854 case PRIV_SYSCTL_WRITEJAIL: 3855 3856 /* 3857 * Allow root in jail to manage a variety of quota 3858 * properties. These should likely be conditional on a 3859 * configuration option. 3860 */ 3861 case PRIV_VFS_GETQUOTA: 3862 case PRIV_VFS_SETQUOTA: 3863 3864 /* 3865 * Since Jail relies on chroot() to implement file system 3866 * protections, grant many VFS privileges to root in jail. 3867 * Be careful to exclude mount-related and NFS-related 3868 * privileges. 3869 */ 3870 case PRIV_VFS_READ: 3871 case PRIV_VFS_WRITE: 3872 case PRIV_VFS_ADMIN: 3873 case PRIV_VFS_EXEC: 3874 case PRIV_VFS_LOOKUP: 3875 case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3876 case PRIV_VFS_CHFLAGS_DEV: 3877 case PRIV_VFS_CHOWN: 3878 case PRIV_VFS_CHROOT: 3879 case PRIV_VFS_RETAINSUGID: 3880 case PRIV_VFS_FCHROOT: 3881 case PRIV_VFS_LINK: 3882 case PRIV_VFS_SETGID: 3883 case PRIV_VFS_STAT: 3884 case PRIV_VFS_STICKYFILE: 3885 return (0); 3886 3887 /* 3888 * Depending on the global setting, allow privilege of 3889 * setting system flags. 3890 */ 3891 case PRIV_VFS_SYSFLAGS: 3892 if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3893 return (0); 3894 else 3895 return (EPERM); 3896 3897 /* 3898 * Depending on the global setting, allow privilege of 3899 * mounting/unmounting file systems. 3900 */ 3901 case PRIV_VFS_MOUNT: 3902 case PRIV_VFS_UNMOUNT: 3903 case PRIV_VFS_MOUNT_NONUSER: 3904 case PRIV_VFS_MOUNT_OWNER: 3905 if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 3906 cred->cr_prison->pr_enforce_statfs < 2) 3907 return (0); 3908 else 3909 return (EPERM); 3910 3911 /* 3912 * Allow jailed root to bind reserved ports and reuse in-use 3913 * ports. 3914 */ 3915 case PRIV_NETINET_RESERVEDPORT: 3916 case PRIV_NETINET_REUSEPORT: 3917 return (0); 3918 3919 /* 3920 * Allow jailed root to set certian IPv4/6 (option) headers. 3921 */ 3922 case PRIV_NETINET_SETHDROPTS: 3923 return (0); 3924 3925 /* 3926 * Conditionally allow creating raw sockets in jail. 3927 */ 3928 case PRIV_NETINET_RAW: 3929 if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3930 return (0); 3931 else 3932 return (EPERM); 3933 3934 /* 3935 * Since jail implements its own visibility limits on netstat 3936 * sysctls, allow getcred. This allows identd to work in 3937 * jail. 3938 */ 3939 case PRIV_NETINET_GETCRED: 3940 return (0); 3941 3942 /* 3943 * Allow jailed root to set loginclass. 3944 */ 3945 case PRIV_PROC_SETLOGINCLASS: 3946 return (0); 3947 3948 default: 3949 /* 3950 * In all remaining cases, deny the privilege request. This 3951 * includes almost all network privileges, many system 3952 * configuration privileges. 3953 */ 3954 return (EPERM); 3955 } 3956 } 3957 3958 /* 3959 * Return the part of pr2's name that is relative to pr1, or the whole name 3960 * if it does not directly follow. 3961 */ 3962 3963 char * 3964 prison_name(struct prison *pr1, struct prison *pr2) 3965 { 3966 char *name; 3967 3968 /* Jails see themselves as "0" (if they see themselves at all). */ 3969 if (pr1 == pr2) 3970 return "0"; 3971 name = pr2->pr_name; 3972 if (prison_ischild(pr1, pr2)) { 3973 /* 3974 * pr1 isn't locked (and allprison_lock may not be either) 3975 * so its length can't be counted on. But the number of dots 3976 * can be counted on - and counted. 3977 */ 3978 for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3979 name = strchr(name, '.') + 1; 3980 } 3981 return (name); 3982 } 3983 3984 /* 3985 * Return the part of pr2's path that is relative to pr1, or the whole path 3986 * if it does not directly follow. 3987 */ 3988 static char * 3989 prison_path(struct prison *pr1, struct prison *pr2) 3990 { 3991 char *path1, *path2; 3992 int len1; 3993 3994 path1 = pr1->pr_path; 3995 path2 = pr2->pr_path; 3996 if (!strcmp(path1, "/")) 3997 return (path2); 3998 len1 = strlen(path1); 3999 if (strncmp(path1, path2, len1)) 4000 return (path2); 4001 if (path2[len1] == '\0') 4002 return "/"; 4003 if (path2[len1] == '/') 4004 return (path2 + len1); 4005 return (path2); 4006 } 4007 4008 4009 /* 4010 * Jail-related sysctls. 4011 */ 4012 static SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 4013 "Jails"); 4014 4015 static int 4016 sysctl_jail_list(SYSCTL_HANDLER_ARGS) 4017 { 4018 struct xprison *xp; 4019 struct prison *pr, *cpr; 4020 #ifdef INET 4021 struct in_addr *ip4 = NULL; 4022 int ip4s = 0; 4023 #endif 4024 #ifdef INET6 4025 struct in6_addr *ip6 = NULL; 4026 int ip6s = 0; 4027 #endif 4028 int descend, error; 4029 4030 xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 4031 pr = req->td->td_ucred->cr_prison; 4032 error = 0; 4033 sx_slock(&allprison_lock); 4034 FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 4035 #if defined(INET) || defined(INET6) 4036 again: 4037 #endif 4038 mtx_lock(&cpr->pr_mtx); 4039 #ifdef INET 4040 if (cpr->pr_ip4s > 0) { 4041 if (ip4s < cpr->pr_ip4s) { 4042 ip4s = cpr->pr_ip4s; 4043 mtx_unlock(&cpr->pr_mtx); 4044 ip4 = realloc(ip4, ip4s * 4045 sizeof(struct in_addr), M_TEMP, M_WAITOK); 4046 goto again; 4047 } 4048 bcopy(cpr->pr_ip4, ip4, 4049 cpr->pr_ip4s * sizeof(struct in_addr)); 4050 } 4051 #endif 4052 #ifdef INET6 4053 if (cpr->pr_ip6s > 0) { 4054 if (ip6s < cpr->pr_ip6s) { 4055 ip6s = cpr->pr_ip6s; 4056 mtx_unlock(&cpr->pr_mtx); 4057 ip6 = realloc(ip6, ip6s * 4058 sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4059 goto again; 4060 } 4061 bcopy(cpr->pr_ip6, ip6, 4062 cpr->pr_ip6s * sizeof(struct in6_addr)); 4063 } 4064 #endif 4065 if (cpr->pr_ref == 0) { 4066 mtx_unlock(&cpr->pr_mtx); 4067 continue; 4068 } 4069 bzero(xp, sizeof(*xp)); 4070 xp->pr_version = XPRISON_VERSION; 4071 xp->pr_id = cpr->pr_id; 4072 xp->pr_state = cpr->pr_uref > 0 4073 ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4074 strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4075 strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4076 strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4077 #ifdef INET 4078 xp->pr_ip4s = cpr->pr_ip4s; 4079 #endif 4080 #ifdef INET6 4081 xp->pr_ip6s = cpr->pr_ip6s; 4082 #endif 4083 mtx_unlock(&cpr->pr_mtx); 4084 error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4085 if (error) 4086 break; 4087 #ifdef INET 4088 if (xp->pr_ip4s > 0) { 4089 error = SYSCTL_OUT(req, ip4, 4090 xp->pr_ip4s * sizeof(struct in_addr)); 4091 if (error) 4092 break; 4093 } 4094 #endif 4095 #ifdef INET6 4096 if (xp->pr_ip6s > 0) { 4097 error = SYSCTL_OUT(req, ip6, 4098 xp->pr_ip6s * sizeof(struct in6_addr)); 4099 if (error) 4100 break; 4101 } 4102 #endif 4103 } 4104 sx_sunlock(&allprison_lock); 4105 free(xp, M_TEMP); 4106 #ifdef INET 4107 free(ip4, M_TEMP); 4108 #endif 4109 #ifdef INET6 4110 free(ip6, M_TEMP); 4111 #endif 4112 return (error); 4113 } 4114 4115 SYSCTL_OID(_security_jail, OID_AUTO, list, 4116 CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4117 sysctl_jail_list, "S", "List of active jails"); 4118 4119 static int 4120 sysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4121 { 4122 int error, injail; 4123 4124 injail = jailed(req->td->td_ucred); 4125 error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4126 4127 return (error); 4128 } 4129 4130 SYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4131 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4132 sysctl_jail_jailed, "I", "Process in jail?"); 4133 4134 #if defined(INET) || defined(INET6) 4135 SYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4136 &jail_max_af_ips, 0, 4137 "Number of IP addresses a jail may have at most per address family"); 4138 #endif 4139 4140 /* 4141 * Default parameters for jail(2) compatability. For historical reasons, 4142 * the sysctl names have varying similarity to the parameter names. Prisons 4143 * just see their own parameters, and can't change them. 4144 */ 4145 static int 4146 sysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4147 { 4148 struct prison *pr; 4149 int allow, error, i; 4150 4151 pr = req->td->td_ucred->cr_prison; 4152 allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4153 4154 /* Get the current flag value, and convert it to a boolean. */ 4155 i = (allow & arg2) ? 1 : 0; 4156 if (arg1 != NULL) 4157 i = !i; 4158 error = sysctl_handle_int(oidp, &i, 0, req); 4159 if (error || !req->newptr) 4160 return (error); 4161 i = i ? arg2 : 0; 4162 if (arg1 != NULL) 4163 i ^= arg2; 4164 /* 4165 * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4166 * for writing. 4167 */ 4168 mtx_lock(&prison0.pr_mtx); 4169 jail_default_allow = (jail_default_allow & ~arg2) | i; 4170 mtx_unlock(&prison0.pr_mtx); 4171 return (0); 4172 } 4173 4174 SYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4175 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4176 NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4177 "Processes in jail can set their hostnames"); 4178 SYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4179 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4180 (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4181 "Processes in jail are limited to creating UNIX/IP/route sockets only"); 4182 SYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4183 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4184 NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4185 "Processes in jail can use System V IPC primitives"); 4186 SYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4187 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4188 NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4189 "Prison root can create raw sockets"); 4190 SYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4191 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4192 NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4193 "Processes in jail can alter system file flags"); 4194 SYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4195 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4196 NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4197 "Processes in jail can mount/unmount jail-friendly file systems"); 4198 4199 static int 4200 sysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4201 { 4202 struct prison *pr; 4203 int level, error; 4204 4205 pr = req->td->td_ucred->cr_prison; 4206 level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4207 error = sysctl_handle_int(oidp, &level, 0, req); 4208 if (error || !req->newptr) 4209 return (error); 4210 *(int *)arg1 = level; 4211 return (0); 4212 } 4213 4214 SYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4215 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4216 &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4217 sysctl_jail_default_level, "I", 4218 "Processes in jail cannot see all mounted file systems"); 4219 4220 SYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset, 4221 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 4222 &jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum), 4223 sysctl_jail_default_level, "I", 4224 "Ruleset for the devfs filesystem in jail"); 4225 4226 /* 4227 * Nodes to describe jail parameters. Maximum length of string parameters 4228 * is returned in the string itself, and the other parameters exist merely 4229 * to make themselves and their types known. 4230 */ 4231 SYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4232 "Jail parameters"); 4233 4234 int 4235 sysctl_jail_param(SYSCTL_HANDLER_ARGS) 4236 { 4237 int i; 4238 long l; 4239 size_t s; 4240 char numbuf[12]; 4241 4242 switch (oidp->oid_kind & CTLTYPE) 4243 { 4244 case CTLTYPE_LONG: 4245 case CTLTYPE_ULONG: 4246 l = 0; 4247 #ifdef SCTL_MASK32 4248 if (!(req->flags & SCTL_MASK32)) 4249 #endif 4250 return (SYSCTL_OUT(req, &l, sizeof(l))); 4251 case CTLTYPE_INT: 4252 case CTLTYPE_UINT: 4253 i = 0; 4254 return (SYSCTL_OUT(req, &i, sizeof(i))); 4255 case CTLTYPE_STRING: 4256 snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4257 return 4258 (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4259 case CTLTYPE_STRUCT: 4260 s = (size_t)arg2; 4261 return (SYSCTL_OUT(req, &s, sizeof(s))); 4262 } 4263 return (0); 4264 } 4265 4266 SYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4267 SYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4268 SYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4269 SYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4270 SYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4271 "I", "Jail secure level"); 4272 SYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4273 "I", "Jail cannot see all mounted file systems"); 4274 SYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW, 4275 "I", "Ruleset for in-jail devfs mounts"); 4276 SYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4277 "B", "Jail persistence"); 4278 #ifdef VIMAGE 4279 SYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4280 "E,jailsys", "Virtual network stack"); 4281 #endif 4282 SYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4283 "B", "Jail is in the process of shutting down"); 4284 4285 SYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4286 SYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4287 "I", "Current number of child jails"); 4288 SYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4289 "I", "Maximum number of child jails"); 4290 4291 SYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4292 SYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4293 "Jail hostname"); 4294 SYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4295 "Jail NIS domainname"); 4296 SYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4297 "Jail host UUID"); 4298 SYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4299 "LU", "Jail host ID"); 4300 4301 SYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4302 SYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4303 4304 #ifdef INET 4305 SYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4306 "Jail IPv4 address virtualization"); 4307 SYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4308 "S,in_addr,a", "Jail IPv4 addresses"); 4309 SYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4310 "B", "Do (not) use IPv4 source address selection rather than the " 4311 "primary jail IPv4 address."); 4312 #endif 4313 #ifdef INET6 4314 SYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4315 "Jail IPv6 address virtualization"); 4316 SYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4317 "S,in6_addr,a", "Jail IPv6 addresses"); 4318 SYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4319 "B", "Do (not) use IPv6 source address selection rather than the " 4320 "primary jail IPv6 address."); 4321 #endif 4322 4323 SYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4324 SYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4325 "B", "Jail may set hostname"); 4326 SYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4327 "B", "Jail may use SYSV IPC"); 4328 SYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4329 "B", "Jail may create raw sockets"); 4330 SYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4331 "B", "Jail may alter system file flags"); 4332 SYSCTL_JAIL_PARAM(_allow, mount, CTLTYPE_INT | CTLFLAG_RW, 4333 "B", "Jail may mount/unmount jail-friendly file systems"); 4334 SYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4335 "B", "Jail may set file quotas"); 4336 SYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4337 "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4338 4339 void 4340 prison_racct_foreach(void (*callback)(struct racct *racct, 4341 void *arg2, void *arg3), void *arg2, void *arg3) 4342 { 4343 struct prison_racct *prr; 4344 4345 sx_slock(&allprison_lock); 4346 LIST_FOREACH(prr, &allprison_racct, prr_next) 4347 (callback)(prr->prr_racct, arg2, arg3); 4348 sx_sunlock(&allprison_lock); 4349 } 4350 4351 static struct prison_racct * 4352 prison_racct_find_locked(const char *name) 4353 { 4354 struct prison_racct *prr; 4355 4356 sx_assert(&allprison_lock, SA_XLOCKED); 4357 4358 if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4359 return (NULL); 4360 4361 LIST_FOREACH(prr, &allprison_racct, prr_next) { 4362 if (strcmp(name, prr->prr_name) != 0) 4363 continue; 4364 4365 /* Found prison_racct with a matching name? */ 4366 prison_racct_hold(prr); 4367 return (prr); 4368 } 4369 4370 /* Add new prison_racct. */ 4371 prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4372 racct_create(&prr->prr_racct); 4373 4374 strcpy(prr->prr_name, name); 4375 refcount_init(&prr->prr_refcount, 1); 4376 LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4377 4378 return (prr); 4379 } 4380 4381 struct prison_racct * 4382 prison_racct_find(const char *name) 4383 { 4384 struct prison_racct *prr; 4385 4386 sx_xlock(&allprison_lock); 4387 prr = prison_racct_find_locked(name); 4388 sx_xunlock(&allprison_lock); 4389 return (prr); 4390 } 4391 4392 void 4393 prison_racct_hold(struct prison_racct *prr) 4394 { 4395 4396 refcount_acquire(&prr->prr_refcount); 4397 } 4398 4399 void 4400 prison_racct_free(struct prison_racct *prr) 4401 { 4402 int old; 4403 4404 old = prr->prr_refcount; 4405 if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4406 return; 4407 4408 sx_xlock(&allprison_lock); 4409 if (refcount_release(&prr->prr_refcount)) { 4410 racct_destroy(&prr->prr_racct); 4411 LIST_REMOVE(prr, prr_next); 4412 sx_xunlock(&allprison_lock); 4413 free(prr, M_PRISON_RACCT); 4414 4415 return; 4416 } 4417 sx_xunlock(&allprison_lock); 4418 } 4419 4420 #ifdef RACCT 4421 static void 4422 prison_racct_attach(struct prison *pr) 4423 { 4424 struct prison_racct *prr; 4425 4426 prr = prison_racct_find_locked(pr->pr_name); 4427 KASSERT(prr != NULL, ("cannot find prison_racct")); 4428 4429 pr->pr_prison_racct = prr; 4430 } 4431 4432 static void 4433 prison_racct_detach(struct prison *pr) 4434 { 4435 prison_racct_free(pr->pr_prison_racct); 4436 pr->pr_prison_racct = NULL; 4437 } 4438 #endif /* RACCT */ 4439 4440 #ifdef DDB 4441 4442 static void 4443 db_show_prison(struct prison *pr) 4444 { 4445 int fi; 4446 #if defined(INET) || defined(INET6) 4447 int ii; 4448 #endif 4449 unsigned jsf; 4450 #ifdef INET6 4451 char ip6buf[INET6_ADDRSTRLEN]; 4452 #endif 4453 4454 db_printf("prison %p:\n", pr); 4455 db_printf(" jid = %d\n", pr->pr_id); 4456 db_printf(" name = %s\n", pr->pr_name); 4457 db_printf(" parent = %p\n", pr->pr_parent); 4458 db_printf(" ref = %d\n", pr->pr_ref); 4459 db_printf(" uref = %d\n", pr->pr_uref); 4460 db_printf(" path = %s\n", pr->pr_path); 4461 db_printf(" cpuset = %d\n", pr->pr_cpuset 4462 ? pr->pr_cpuset->cs_id : -1); 4463 #ifdef VIMAGE 4464 db_printf(" vnet = %p\n", pr->pr_vnet); 4465 #endif 4466 db_printf(" root = %p\n", pr->pr_root); 4467 db_printf(" securelevel = %d\n", pr->pr_securelevel); 4468 db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum); 4469 db_printf(" children.max = %d\n", pr->pr_childmax); 4470 db_printf(" children.cur = %d\n", pr->pr_childcount); 4471 db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4472 db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4473 db_printf(" flags = 0x%x", pr->pr_flags); 4474 for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4475 fi++) 4476 if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4477 db_printf(" %s", pr_flag_names[fi]); 4478 for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4479 fi++) { 4480 jsf = pr->pr_flags & 4481 (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4482 db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4483 pr_flag_jailsys[fi].disable && 4484 (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4485 : (jsf == pr_flag_jailsys[fi].new) ? "new" 4486 : "inherit"); 4487 } 4488 db_printf(" allow = 0x%x", pr->pr_allow); 4489 for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4490 fi++) 4491 if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4492 db_printf(" %s", pr_allow_names[fi]); 4493 db_printf("\n"); 4494 db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4495 db_printf(" host.hostname = %s\n", pr->pr_hostname); 4496 db_printf(" host.domainname = %s\n", pr->pr_domainname); 4497 db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4498 db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4499 #ifdef INET 4500 db_printf(" ip4s = %d\n", pr->pr_ip4s); 4501 for (ii = 0; ii < pr->pr_ip4s; ii++) 4502 db_printf(" %s %s\n", 4503 ii == 0 ? "ip4.addr =" : " ", 4504 inet_ntoa(pr->pr_ip4[ii])); 4505 #endif 4506 #ifdef INET6 4507 db_printf(" ip6s = %d\n", pr->pr_ip6s); 4508 for (ii = 0; ii < pr->pr_ip6s; ii++) 4509 db_printf(" %s %s\n", 4510 ii == 0 ? "ip6.addr =" : " ", 4511 ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4512 #endif 4513 } 4514 4515 DB_SHOW_COMMAND(prison, db_show_prison_command) 4516 { 4517 struct prison *pr; 4518 4519 if (!have_addr) { 4520 /* 4521 * Show all prisons in the list, and prison0 which is not 4522 * listed. 4523 */ 4524 db_show_prison(&prison0); 4525 if (!db_pager_quit) { 4526 TAILQ_FOREACH(pr, &allprison, pr_list) { 4527 db_show_prison(pr); 4528 if (db_pager_quit) 4529 break; 4530 } 4531 } 4532 return; 4533 } 4534 4535 if (addr == 0) 4536 pr = &prison0; 4537 else { 4538 /* Look for a prison with the ID and with references. */ 4539 TAILQ_FOREACH(pr, &allprison, pr_list) 4540 if (pr->pr_id == addr && pr->pr_ref > 0) 4541 break; 4542 if (pr == NULL) 4543 /* Look again, without requiring a reference. */ 4544 TAILQ_FOREACH(pr, &allprison, pr_list) 4545 if (pr->pr_id == addr) 4546 break; 4547 if (pr == NULL) 4548 /* Assume address points to a valid prison. */ 4549 pr = (struct prison *)addr; 4550 } 4551 db_show_prison(pr); 4552 } 4553 4554 #endif /* DDB */ 4555