kern_jail.c revision 230407
1139804Simp/*- 2185435Sbz * Copyright (c) 1999 Poul-Henning Kamp. 3185435Sbz * Copyright (c) 2008 Bjoern A. Zeeb. 4191673Sjamie * Copyright (c) 2009 James Gritton. 5185435Sbz * All rights reserved. 6190466Sjamie * 7185404Sbz * Redistribution and use in source and binary forms, with or without 8185404Sbz * modification, are permitted provided that the following conditions 9185404Sbz * are met: 10185404Sbz * 1. Redistributions of source code must retain the above copyright 11185404Sbz * notice, this list of conditions and the following disclaimer. 12185404Sbz * 2. Redistributions in binary form must reproduce the above copyright 13185404Sbz * notice, this list of conditions and the following disclaimer in the 14185404Sbz * documentation and/or other materials provided with the distribution. 15185404Sbz * 16185404Sbz * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17185404Sbz * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18185404Sbz * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19185404Sbz * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20185404Sbz * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21185404Sbz * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22185404Sbz * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23185404Sbz * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24185404Sbz * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25185404Sbz * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26185404Sbz * SUCH DAMAGE. 2746197Sphk */ 2846155Sphk 29116182Sobrien#include <sys/cdefs.h> 30116182Sobrien__FBSDID("$FreeBSD: head/sys/kern/kern_jail.c 230407 2012-01-21 00:06:21Z mm $"); 31116182Sobrien 32193066Sjamie#include "opt_compat.h" 33185435Sbz#include "opt_ddb.h" 34185435Sbz#include "opt_inet.h" 35185435Sbz#include "opt_inet6.h" 36131177Spjd 3746155Sphk#include <sys/param.h> 3846155Sphk#include <sys/types.h> 3946155Sphk#include <sys/kernel.h> 4046155Sphk#include <sys/systm.h> 4146155Sphk#include <sys/errno.h> 4246155Sphk#include <sys/sysproto.h> 4346155Sphk#include <sys/malloc.h> 44192895Sjamie#include <sys/osd.h> 45164032Srwatson#include <sys/priv.h> 4646155Sphk#include <sys/proc.h> 47124882Srwatson#include <sys/taskqueue.h> 48177785Skib#include <sys/fcntl.h> 4946155Sphk#include <sys/jail.h> 5087275Srwatson#include <sys/lock.h> 5187275Srwatson#include <sys/mutex.h> 52220137Strasz#include <sys/racct.h> 53221362Strasz#include <sys/refcount.h> 54168401Spjd#include <sys/sx.h> 55193066Sjamie#include <sys/sysent.h> 56113275Smike#include <sys/namei.h> 57147185Spjd#include <sys/mount.h> 58113275Smike#include <sys/queue.h> 5946155Sphk#include <sys/socket.h> 60113275Smike#include <sys/syscallsubr.h> 6157163Srwatson#include <sys/sysctl.h> 62113275Smike#include <sys/vnode.h> 63196019Srwatson 6446155Sphk#include <net/if.h> 65196019Srwatson#include <net/vnet.h> 66196019Srwatson 6746155Sphk#include <netinet/in.h> 68196019Srwatson 69185435Sbz#ifdef DDB 70185435Sbz#include <ddb/ddb.h> 71185435Sbz#ifdef INET6 72185435Sbz#include <netinet6/in6_var.h> 73185435Sbz#endif /* INET6 */ 74185435Sbz#endif /* DDB */ 7546155Sphk 76163606Srwatson#include <security/mac/mac_framework.h> 77163606Srwatson 78195944Sjamie#define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" 79195944Sjamie 8046155SphkMALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 81227293Sedstatic MALLOC_DEFINE(M_PRISON_RACCT, "prison_racct", "Prison racct structures"); 8246155Sphk 83202468Sbz/* Keep struct prison prison0 and some code in kern_jail_set() readable. */ 84202468Sbz#ifdef INET 85202468Sbz#ifdef INET6 86202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL 87202468Sbz#else 88202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL 89202468Sbz#endif 90202468Sbz#else /* !INET */ 91202468Sbz#ifdef INET6 92202468Sbz#define _PR_IP_SADDRSEL PR_IP6_SADDRSEL 93202468Sbz#else 94202468Sbz#define _PR_IP_SADDRSEL 0 95202468Sbz#endif 96202468Sbz#endif 97202468Sbz 98192895Sjamie/* prison0 describes what is "real" about the system. */ 99192895Sjamiestruct prison prison0 = { 100192895Sjamie .pr_id = 0, 101192895Sjamie .pr_name = "0", 102192895Sjamie .pr_ref = 1, 103192895Sjamie .pr_uref = 1, 104192895Sjamie .pr_path = "/", 105192895Sjamie .pr_securelevel = -1, 106194762Sjamie .pr_childmax = JAIL_MAX, 107195944Sjamie .pr_hostuuid = DEFAULT_HOSTUUID, 108201145Santoine .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), 109196176Sbz#ifdef VIMAGE 110202468Sbz .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, 111196176Sbz#else 112202468Sbz .pr_flags = PR_HOST|_PR_IP_SADDRSEL, 113196176Sbz#endif 114192895Sjamie .pr_allow = PR_ALLOW_ALL, 115192895Sjamie}; 116192895SjamieMTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); 11757163Srwatson 118221362Strasz/* allprison, allprison_racct and lastprid are protected by allprison_lock. */ 119168401Spjdstruct sx allprison_lock; 120191673SjamieSX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); 121191673Sjamiestruct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); 122221362StraszLIST_HEAD(, prison_racct) allprison_racct; 123179881Sdelphijint lastprid = 0; 124113275Smike 125191673Sjamiestatic int do_jail_attach(struct thread *td, struct prison *pr); 126190466Sjamiestatic void prison_complete(void *context, int pending); 127191673Sjamiestatic void prison_deref(struct prison *pr, int flags); 128192895Sjamiestatic char *prison_path(struct prison *pr1, struct prison *pr2); 129192895Sjamiestatic void prison_remove_one(struct prison *pr); 130221362Strasz#ifdef RACCT 131221362Straszstatic void prison_racct_attach(struct prison *pr); 132221362Straszstatic void prison_racct_detach(struct prison *pr); 133221362Strasz#endif 134185435Sbz#ifdef INET 135190466Sjamiestatic int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 136192895Sjamiestatic int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 137185435Sbz#endif 138185435Sbz#ifdef INET6 139190466Sjamiestatic int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 140192895Sjamiestatic int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 141185435Sbz#endif 142113275Smike 143191673Sjamie/* Flags for prison_deref */ 144191673Sjamie#define PD_DEREF 0x01 145191673Sjamie#define PD_DEUREF 0x02 146191673Sjamie#define PD_LOCKED 0x04 147191673Sjamie#define PD_LIST_SLOCKED 0x08 148191673Sjamie#define PD_LIST_XLOCKED 0x10 149113275Smike 150192895Sjamie/* 151216861Sbz * Parameter names corresponding to PR_* flag values. Size values are for kvm 152216861Sbz * as we cannot figure out the size of a sparse array, or an array without a 153216861Sbz * terminating entry. 154192895Sjamie */ 155192895Sjamiestatic char *pr_flag_names[] = { 156192895Sjamie [0] = "persist", 157202468Sbz#ifdef INET 158202468Sbz [7] = "ip4.saddrsel", 159202468Sbz#endif 160202468Sbz#ifdef INET6 161202468Sbz [8] = "ip6.saddrsel", 162202468Sbz#endif 163192895Sjamie}; 164216861Sbzconst size_t pr_flag_names_size = sizeof(pr_flag_names); 165192895Sjamie 166192895Sjamiestatic char *pr_flag_nonames[] = { 167192895Sjamie [0] = "nopersist", 168202468Sbz#ifdef INET 169202468Sbz [7] = "ip4.nosaddrsel", 170202468Sbz#endif 171202468Sbz#ifdef INET6 172202468Sbz [8] = "ip6.nosaddrsel", 173202468Sbz#endif 174195870Sjamie}; 175216861Sbzconst size_t pr_flag_nonames_size = sizeof(pr_flag_nonames); 176195870Sjamie 177195870Sjamiestruct jailsys_flags { 178195870Sjamie const char *name; 179195870Sjamie unsigned disable; 180195870Sjamie unsigned new; 181195870Sjamie} pr_flag_jailsys[] = { 182195870Sjamie { "host", 0, PR_HOST }, 183195870Sjamie#ifdef VIMAGE 184195870Sjamie { "vnet", 0, PR_VNET }, 185195870Sjamie#endif 186192895Sjamie#ifdef INET 187195870Sjamie { "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER }, 188192895Sjamie#endif 189192895Sjamie#ifdef INET6 190195870Sjamie { "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER }, 191192895Sjamie#endif 192192895Sjamie}; 193216861Sbzconst size_t pr_flag_jailsys_size = sizeof(pr_flag_jailsys); 194192895Sjamie 195192895Sjamiestatic char *pr_allow_names[] = { 196192895Sjamie "allow.set_hostname", 197192895Sjamie "allow.sysvipc", 198192895Sjamie "allow.raw_sockets", 199192895Sjamie "allow.chflags", 200192895Sjamie "allow.mount", 201192895Sjamie "allow.quotas", 202192895Sjamie "allow.socket_af", 203192895Sjamie}; 204216861Sbzconst size_t pr_allow_names_size = sizeof(pr_allow_names); 205192895Sjamie 206192895Sjamiestatic char *pr_allow_nonames[] = { 207192895Sjamie "allow.noset_hostname", 208192895Sjamie "allow.nosysvipc", 209192895Sjamie "allow.noraw_sockets", 210192895Sjamie "allow.nochflags", 211192895Sjamie "allow.nomount", 212192895Sjamie "allow.noquotas", 213192895Sjamie "allow.nosocket_af", 214192895Sjamie}; 215216861Sbzconst size_t pr_allow_nonames_size = sizeof(pr_allow_nonames); 216192895Sjamie 217196002Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 218196002Sjamie#define JAIL_DEFAULT_ENFORCE_STATFS 2 219192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 220196002Sjamiestatic int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 221192895Sjamie#if defined(INET) || defined(INET6) 222193865Sjamiestatic unsigned jail_max_af_ips = 255; 223192895Sjamie#endif 224192895Sjamie 225192895Sjamie#ifdef INET 226185435Sbzstatic int 227185435Sbzqcmp_v4(const void *ip1, const void *ip2) 228185435Sbz{ 229185435Sbz in_addr_t iaa, iab; 230185435Sbz 231185435Sbz /* 232185435Sbz * We need to compare in HBO here to get the list sorted as expected 233185435Sbz * by the result of the code. Sorting NBO addresses gives you 234185435Sbz * interesting results. If you do not understand, do not try. 235185435Sbz */ 236185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 237185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 238185435Sbz 239185435Sbz /* 240185435Sbz * Do not simply return the difference of the two numbers, the int is 241185435Sbz * not wide enough. 242185435Sbz */ 243185435Sbz if (iaa > iab) 244185435Sbz return (1); 245185435Sbz else if (iaa < iab) 246185435Sbz return (-1); 247185435Sbz else 248185435Sbz return (0); 249185435Sbz} 250185435Sbz#endif 251185435Sbz 252185435Sbz#ifdef INET6 253185435Sbzstatic int 254185435Sbzqcmp_v6(const void *ip1, const void *ip2) 255185435Sbz{ 256185435Sbz const struct in6_addr *ia6a, *ia6b; 257185435Sbz int i, rc; 258185435Sbz 259185435Sbz ia6a = (const struct in6_addr *)ip1; 260185435Sbz ia6b = (const struct in6_addr *)ip2; 261185435Sbz 262185435Sbz rc = 0; 263190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 264185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 265185435Sbz rc = 1; 266185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 267185435Sbz rc = -1; 268185435Sbz } 269185435Sbz return (rc); 270185435Sbz} 271185435Sbz#endif 272185435Sbz 273191673Sjamie/* 274191673Sjamie * struct jail_args { 275191673Sjamie * struct jail *jail; 276191673Sjamie * }; 277191673Sjamie */ 278191673Sjamieint 279225617Skmacysys_jail(struct thread *td, struct jail_args *uap) 280185435Sbz{ 281191673Sjamie uint32_t version; 282191673Sjamie int error; 283192895Sjamie struct jail j; 284185435Sbz 285191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 286191673Sjamie if (error) 287191673Sjamie return (error); 288185435Sbz 289191673Sjamie switch (version) { 290191673Sjamie case 0: 291191673Sjamie { 292191673Sjamie struct jail_v0 j0; 293185435Sbz 294192895Sjamie /* FreeBSD single IPv4 jails. */ 295192895Sjamie bzero(&j, sizeof(struct jail)); 296191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 297191673Sjamie if (error) 298191673Sjamie return (error); 299192895Sjamie j.version = j0.version; 300192895Sjamie j.path = j0.path; 301192895Sjamie j.hostname = j0.hostname; 302192895Sjamie j.ip4s = j0.ip_number; 303191673Sjamie break; 304191673Sjamie } 305191673Sjamie 306191673Sjamie case 1: 307185435Sbz /* 308191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 309191673Sjamie * that never made it into the official kernel. 310185435Sbz */ 311191673Sjamie return (EINVAL); 312185435Sbz 313191673Sjamie case 2: /* JAIL_API_VERSION */ 314191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 315191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 316191673Sjamie if (error) 317191673Sjamie return (error); 318192895Sjamie break; 319192895Sjamie 320192895Sjamie default: 321192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 322192895Sjamie return (EINVAL); 323192895Sjamie } 324192895Sjamie return (kern_jail(td, &j)); 325192895Sjamie} 326192895Sjamie 327192895Sjamieint 328192895Sjamiekern_jail(struct thread *td, struct jail *j) 329192895Sjamie{ 330193865Sjamie struct iovec optiov[2 * (4 331193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 332193865Sjamie#ifdef INET 333193865Sjamie + 1 334193865Sjamie#endif 335193865Sjamie#ifdef INET6 336193865Sjamie + 1 337193865Sjamie#endif 338193865Sjamie )]; 339192895Sjamie struct uio opt; 340192895Sjamie char *u_path, *u_hostname, *u_name; 341185435Sbz#ifdef INET 342193865Sjamie uint32_t ip4s; 343192895Sjamie struct in_addr *u_ip4; 344192895Sjamie#endif 345192895Sjamie#ifdef INET6 346192895Sjamie struct in6_addr *u_ip6; 347192895Sjamie#endif 348192895Sjamie size_t tmplen; 349192895Sjamie int error, enforce_statfs, fi; 350192895Sjamie 351192895Sjamie bzero(&optiov, sizeof(optiov)); 352192895Sjamie opt.uio_iov = optiov; 353192895Sjamie opt.uio_iovcnt = 0; 354192895Sjamie opt.uio_offset = -1; 355192895Sjamie opt.uio_resid = -1; 356192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 357192895Sjamie opt.uio_rw = UIO_READ; 358192895Sjamie opt.uio_td = td; 359192895Sjamie 360192895Sjamie /* Set permissions for top-level jails from sysctls. */ 361192895Sjamie if (!jailed(td->td_ucred)) { 362192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 363192895Sjamie sizeof(pr_allow_names[0]); fi++) { 364192895Sjamie optiov[opt.uio_iovcnt].iov_base = 365192895Sjamie (jail_default_allow & (1 << fi)) 366192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 367192895Sjamie optiov[opt.uio_iovcnt].iov_len = 368192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 369192895Sjamie opt.uio_iovcnt += 2; 370192895Sjamie } 371192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 372192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 373192895Sjamie opt.uio_iovcnt++; 374192895Sjamie enforce_statfs = jail_default_enforce_statfs; 375192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 376192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 377192895Sjamie opt.uio_iovcnt++; 378192895Sjamie } 379192895Sjamie 380192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 381192895Sjamie#ifdef INET 382192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 383192895Sjamie if (ip4s > jail_max_af_ips) 384192895Sjamie return (EINVAL); 385192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 386191673Sjamie#else 387192895Sjamie if (j->ip4s > 0) 388192895Sjamie return (EINVAL); 389191673Sjamie#endif 390191673Sjamie#ifdef INET6 391192895Sjamie if (j->ip6s > jail_max_af_ips) 392192895Sjamie return (EINVAL); 393192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 394191673Sjamie#else 395192895Sjamie if (j->ip6s > 0) 396192895Sjamie return (EINVAL); 397191673Sjamie#endif 398192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 399192895Sjamie u_hostname = u_path + MAXPATHLEN; 400192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 401191673Sjamie#ifdef INET 402192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 403191673Sjamie#endif 404191673Sjamie#ifdef INET6 405191673Sjamie#ifdef INET 406192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 407191673Sjamie#else 408192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 409191673Sjamie#endif 410191673Sjamie#endif 411192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 412192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 413192895Sjamie opt.uio_iovcnt++; 414192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 415192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 416192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 417192895Sjamie if (error) { 418192895Sjamie free(u_path, M_TEMP); 419192895Sjamie return (error); 420192895Sjamie } 421192895Sjamie opt.uio_iovcnt++; 422192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 423192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 424192895Sjamie opt.uio_iovcnt++; 425192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 426192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 427192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 428192895Sjamie if (error) { 429192895Sjamie free(u_path, M_TEMP); 430192895Sjamie return (error); 431192895Sjamie } 432192895Sjamie opt.uio_iovcnt++; 433192895Sjamie if (j->jailname != NULL) { 434192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 435192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 436192895Sjamie opt.uio_iovcnt++; 437192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 438192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 439192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 440191673Sjamie if (error) { 441191673Sjamie free(u_path, M_TEMP); 442191673Sjamie return (error); 443191673Sjamie } 444192895Sjamie opt.uio_iovcnt++; 445192895Sjamie } 446191673Sjamie#ifdef INET 447192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 448192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 449192895Sjamie opt.uio_iovcnt++; 450192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 451192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 452192895Sjamie if (j->version == 0) 453192895Sjamie u_ip4->s_addr = j->ip4s; 454192895Sjamie else { 455192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 456191673Sjamie if (error) { 457191673Sjamie free(u_path, M_TEMP); 458191673Sjamie return (error); 459191673Sjamie } 460192895Sjamie } 461192895Sjamie opt.uio_iovcnt++; 462185435Sbz#endif 463185435Sbz#ifdef INET6 464192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 465192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 466192895Sjamie opt.uio_iovcnt++; 467192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 468192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 469192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 470192895Sjamie if (error) { 471192895Sjamie free(u_path, M_TEMP); 472192895Sjamie return (error); 473192895Sjamie } 474192895Sjamie opt.uio_iovcnt++; 475185435Sbz#endif 476192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 477192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 478191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 479191673Sjamie free(u_path, M_TEMP); 480191673Sjamie return (error); 481185435Sbz} 482185435Sbz 483192895Sjamie 484191673Sjamie/* 485191673Sjamie * struct jail_set_args { 486191673Sjamie * struct iovec *iovp; 487191673Sjamie * unsigned int iovcnt; 488191673Sjamie * int flags; 489191673Sjamie * }; 490191673Sjamie */ 491191673Sjamieint 492225617Skmacysys_jail_set(struct thread *td, struct jail_set_args *uap) 493185435Sbz{ 494191673Sjamie struct uio *auio; 495191673Sjamie int error; 496191673Sjamie 497191673Sjamie /* Check that we have an even number of iovecs. */ 498191673Sjamie if (uap->iovcnt & 1) 499191673Sjamie return (EINVAL); 500191673Sjamie 501191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 502191673Sjamie if (error) 503191673Sjamie return (error); 504191673Sjamie error = kern_jail_set(td, auio, uap->flags); 505191673Sjamie free(auio, M_IOV); 506191673Sjamie return (error); 507191673Sjamie} 508191673Sjamie 509191673Sjamieint 510191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 511191673Sjamie{ 512191673Sjamie struct nameidata nd; 513185435Sbz#ifdef INET 514190466Sjamie struct in_addr *ip4; 515185435Sbz#endif 516185435Sbz#ifdef INET6 517185435Sbz struct in6_addr *ip6; 518185435Sbz#endif 519191673Sjamie struct vfsopt *opt; 520191673Sjamie struct vfsoptlist *opts; 521196135Sbz struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 522191673Sjamie struct vnode *root; 523196835Sjamie char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 524230407Smm char *g_path; 525192895Sjamie#if defined(INET) || defined(INET6) 526196135Sbz struct prison *tppr; 527191673Sjamie void *op; 528192895Sjamie#endif 529193066Sjamie unsigned long hid; 530192895Sjamie size_t namelen, onamelen; 531192895Sjamie int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 532195870Sjamie int gotchildmax, gotenforce, gothid, gotslevel; 533195870Sjamie int fi, jid, jsys, len, level; 534194762Sjamie int childmax, slevel, vfslocked; 535230129Smm int fullpath_disabled; 536191673Sjamie#if defined(INET) || defined(INET6) 537192895Sjamie int ii, ij; 538191673Sjamie#endif 539191673Sjamie#ifdef INET 540195974Sjamie int ip4s, redo_ip4; 541191673Sjamie#endif 542191673Sjamie#ifdef INET6 543195974Sjamie int ip6s, redo_ip6; 544191673Sjamie#endif 545224290Smckusick uint64_t pr_allow, ch_allow, pr_flags, ch_flags; 546224290Smckusick unsigned tallow; 547191673Sjamie char numbuf[12]; 548185435Sbz 549191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 550191673Sjamie if (!error && (flags & JAIL_ATTACH)) 551191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 552191673Sjamie if (error) 553191673Sjamie return (error); 554192895Sjamie mypr = ppr = td->td_ucred->cr_prison; 555194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 556192895Sjamie return (EPERM); 557191673Sjamie if (flags & ~JAIL_SET_MASK) 558191673Sjamie return (EINVAL); 559191673Sjamie 560185435Sbz /* 561191673Sjamie * Check all the parameters before committing to anything. Not all 562191673Sjamie * errors can be caught early, but we may as well try. Also, this 563191673Sjamie * takes care of some expensive stuff (path lookup) before getting 564191673Sjamie * the allprison lock. 565185435Sbz * 566191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 567191673Sjamie * options. But it makes more sense to re-use the vfsopt code 568191673Sjamie * than duplicate it under a different name. 569185435Sbz */ 570191673Sjamie error = vfs_buildopts(optuio, &opts); 571191673Sjamie if (error) 572191673Sjamie return (error); 573185435Sbz#ifdef INET 574185435Sbz ip4 = NULL; 575185435Sbz#endif 576185435Sbz#ifdef INET6 577185435Sbz ip6 = NULL; 578185435Sbz#endif 579230407Smm g_path = NULL; 580191673Sjamie 581191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 582191673Sjamie if (error == ENOENT) 583191673Sjamie jid = 0; 584191673Sjamie else if (error != 0) 585191673Sjamie goto done_free; 586191673Sjamie 587191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 588191673Sjamie if (error == ENOENT) 589191673Sjamie gotslevel = 0; 590191673Sjamie else if (error != 0) 591191673Sjamie goto done_free; 592191673Sjamie else 593191673Sjamie gotslevel = 1; 594191673Sjamie 595194762Sjamie error = 596194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 597194762Sjamie if (error == ENOENT) 598194762Sjamie gotchildmax = 0; 599194762Sjamie else if (error != 0) 600194762Sjamie goto done_free; 601194762Sjamie else 602194762Sjamie gotchildmax = 1; 603194762Sjamie 604192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 605212436Sjamie if (error == ENOENT) 606212436Sjamie gotenforce = 0; 607212436Sjamie else if (error != 0) 608192895Sjamie goto done_free; 609212436Sjamie else if (enforce < 0 || enforce > 2) { 610212436Sjamie error = EINVAL; 611212436Sjamie goto done_free; 612212436Sjamie } else 613212436Sjamie gotenforce = 1; 614192895Sjamie 615191673Sjamie pr_flags = ch_flags = 0; 616192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 617192895Sjamie fi++) { 618192895Sjamie if (pr_flag_names[fi] == NULL) 619192895Sjamie continue; 620192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 621192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 622192895Sjamie } 623191673Sjamie ch_flags |= pr_flags; 624195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 625195870Sjamie fi++) { 626195870Sjamie error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 627195870Sjamie sizeof(jsys)); 628195870Sjamie if (error == ENOENT) 629195870Sjamie continue; 630195870Sjamie if (error != 0) 631195870Sjamie goto done_free; 632195870Sjamie switch (jsys) { 633195870Sjamie case JAIL_SYS_DISABLE: 634195870Sjamie if (!pr_flag_jailsys[fi].disable) { 635195870Sjamie error = EINVAL; 636195870Sjamie goto done_free; 637195870Sjamie } 638195870Sjamie pr_flags |= pr_flag_jailsys[fi].disable; 639195870Sjamie break; 640195870Sjamie case JAIL_SYS_NEW: 641195870Sjamie pr_flags |= pr_flag_jailsys[fi].new; 642195870Sjamie break; 643195870Sjamie case JAIL_SYS_INHERIT: 644195870Sjamie break; 645195870Sjamie default: 646195870Sjamie error = EINVAL; 647195870Sjamie goto done_free; 648195870Sjamie } 649195870Sjamie ch_flags |= 650195870Sjamie pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 651195870Sjamie } 652211085Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 653211085Sjamie && !(pr_flags & PR_PERSIST)) { 654211085Sjamie error = EINVAL; 655211085Sjamie vfs_opterror(opts, "new jail must persist or attach"); 656211085Sjamie goto done_errmsg; 657211085Sjamie } 658194251Sjamie#ifdef VIMAGE 659194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 660194251Sjamie error = EINVAL; 661194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 662194251Sjamie goto done_errmsg; 663194251Sjamie } 664194251Sjamie#endif 665195974Sjamie#ifdef INET 666195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 667195974Sjamie error = EINVAL; 668195974Sjamie vfs_opterror(opts, "ip4 cannot be changed after creation"); 669195974Sjamie goto done_errmsg; 670195974Sjamie } 671195974Sjamie#endif 672195974Sjamie#ifdef INET6 673195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 674195974Sjamie error = EINVAL; 675195974Sjamie vfs_opterror(opts, "ip6 cannot be changed after creation"); 676195974Sjamie goto done_errmsg; 677195974Sjamie } 678195974Sjamie#endif 679191673Sjamie 680192895Sjamie pr_allow = ch_allow = 0; 681192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 682192895Sjamie fi++) { 683192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 684192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 685192895Sjamie } 686192895Sjamie ch_allow |= pr_allow; 687192895Sjamie 688191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 689191673Sjamie if (error == ENOENT) 690191673Sjamie name = NULL; 691191673Sjamie else if (error != 0) 692191673Sjamie goto done_free; 693191673Sjamie else { 694191673Sjamie if (len == 0 || name[len - 1] != '\0') { 695191673Sjamie error = EINVAL; 696191673Sjamie goto done_free; 697191673Sjamie } 698191673Sjamie if (len > MAXHOSTNAMELEN) { 699191673Sjamie error = ENAMETOOLONG; 700191673Sjamie goto done_free; 701191673Sjamie } 702191673Sjamie } 703191673Sjamie 704191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 705191673Sjamie if (error == ENOENT) 706191673Sjamie host = NULL; 707191673Sjamie else if (error != 0) 708191673Sjamie goto done_free; 709191673Sjamie else { 710193066Sjamie ch_flags |= PR_HOST; 711193066Sjamie pr_flags |= PR_HOST; 712191673Sjamie if (len == 0 || host[len - 1] != '\0') { 713191673Sjamie error = EINVAL; 714191673Sjamie goto done_free; 715191673Sjamie } 716191673Sjamie if (len > MAXHOSTNAMELEN) { 717191673Sjamie error = ENAMETOOLONG; 718191673Sjamie goto done_free; 719191673Sjamie } 720191673Sjamie } 721191673Sjamie 722193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 723193066Sjamie if (error == ENOENT) 724193066Sjamie domain = NULL; 725193066Sjamie else if (error != 0) 726193066Sjamie goto done_free; 727193066Sjamie else { 728193066Sjamie ch_flags |= PR_HOST; 729193066Sjamie pr_flags |= PR_HOST; 730193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 731193066Sjamie error = EINVAL; 732193066Sjamie goto done_free; 733193066Sjamie } 734193066Sjamie if (len > MAXHOSTNAMELEN) { 735193066Sjamie error = ENAMETOOLONG; 736193066Sjamie goto done_free; 737193066Sjamie } 738193066Sjamie } 739193066Sjamie 740193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 741193066Sjamie if (error == ENOENT) 742193066Sjamie uuid = NULL; 743193066Sjamie else if (error != 0) 744193066Sjamie goto done_free; 745193066Sjamie else { 746193066Sjamie ch_flags |= PR_HOST; 747193066Sjamie pr_flags |= PR_HOST; 748193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 749193066Sjamie error = EINVAL; 750193066Sjamie goto done_free; 751193066Sjamie } 752193066Sjamie if (len > HOSTUUIDLEN) { 753193066Sjamie error = ENAMETOOLONG; 754193066Sjamie goto done_free; 755193066Sjamie } 756193066Sjamie } 757193066Sjamie 758205014Snwhitehorn#ifdef COMPAT_FREEBSD32 759217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 760193066Sjamie uint32_t hid32; 761193066Sjamie 762193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 763193066Sjamie hid = hid32; 764193066Sjamie } else 765193066Sjamie#endif 766193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 767193066Sjamie if (error == ENOENT) 768193066Sjamie gothid = 0; 769193066Sjamie else if (error != 0) 770193066Sjamie goto done_free; 771193066Sjamie else { 772193066Sjamie gothid = 1; 773193066Sjamie ch_flags |= PR_HOST; 774193066Sjamie pr_flags |= PR_HOST; 775193066Sjamie } 776193066Sjamie 777185435Sbz#ifdef INET 778191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 779191673Sjamie if (error == ENOENT) 780195870Sjamie ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1; 781191673Sjamie else if (error != 0) 782191673Sjamie goto done_free; 783191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 784191673Sjamie error = EINVAL; 785191673Sjamie goto done_free; 786192895Sjamie } else { 787195870Sjamie ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 788195870Sjamie if (ip4s == 0) 789195870Sjamie pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 790195870Sjamie else { 791195870Sjamie pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 792192895Sjamie ip4s /= sizeof(*ip4); 793192895Sjamie if (ip4s > jail_max_af_ips) { 794185435Sbz error = EINVAL; 795192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 796192895Sjamie goto done_errmsg; 797185435Sbz } 798195974Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 799192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 800192895Sjamie /* 801192895Sjamie * IP addresses are all sorted but ip[0] to preserve 802192895Sjamie * the primary IP address as given from userland. 803192895Sjamie * This special IP is used for unbound outgoing 804202116Sbz * connections as well for "loopback" traffic in case 805202116Sbz * source address selection cannot find any more fitting 806202116Sbz * address to connect from. 807192895Sjamie */ 808192895Sjamie if (ip4s > 1) 809192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 810192895Sjamie /* 811192895Sjamie * Check for duplicate addresses and do some simple 812192895Sjamie * zero and broadcast checks. If users give other bogus 813192895Sjamie * addresses it is their problem. 814192895Sjamie * 815192895Sjamie * We do not have to care about byte order for these 816192895Sjamie * checks so we will do them in NBO. 817192895Sjamie */ 818192895Sjamie for (ii = 0; ii < ip4s; ii++) { 819192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 820192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 821192895Sjamie error = EINVAL; 822192895Sjamie goto done_free; 823192895Sjamie } 824192895Sjamie if ((ii+1) < ip4s && 825192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 826192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 827192895Sjamie error = EINVAL; 828192895Sjamie goto done_free; 829192895Sjamie } 830192895Sjamie } 831185435Sbz } 832191673Sjamie } 833191673Sjamie#endif 834185435Sbz 835185435Sbz#ifdef INET6 836191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 837191673Sjamie if (error == ENOENT) 838195870Sjamie ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1; 839191673Sjamie else if (error != 0) 840191673Sjamie goto done_free; 841191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 842191673Sjamie error = EINVAL; 843191673Sjamie goto done_free; 844192895Sjamie } else { 845195870Sjamie ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 846195870Sjamie if (ip6s == 0) 847195870Sjamie pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 848195870Sjamie else { 849195870Sjamie pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 850192895Sjamie ip6s /= sizeof(*ip6); 851192895Sjamie if (ip6s > jail_max_af_ips) { 852185435Sbz error = EINVAL; 853192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 854192895Sjamie goto done_errmsg; 855185435Sbz } 856195974Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 857192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 858192895Sjamie if (ip6s > 1) 859192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 860192895Sjamie for (ii = 0; ii < ip6s; ii++) { 861192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 862192895Sjamie error = EINVAL; 863192895Sjamie goto done_free; 864192895Sjamie } 865192895Sjamie if ((ii+1) < ip6s && 866192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 867192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 868192895Sjamie { 869192895Sjamie error = EINVAL; 870192895Sjamie goto done_free; 871192895Sjamie } 872192895Sjamie } 873185435Sbz } 874191673Sjamie } 875185435Sbz#endif 876185435Sbz 877195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 878195945Sjamie if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 879195945Sjamie error = EINVAL; 880195945Sjamie vfs_opterror(opts, 881195945Sjamie "vnet jails cannot have IP address restrictions"); 882195945Sjamie goto done_errmsg; 883195945Sjamie } 884195945Sjamie#endif 885195945Sjamie 886230143Smm fullpath_disabled = 0; 887191673Sjamie root = NULL; 888191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 889191673Sjamie if (error == ENOENT) 890191673Sjamie path = NULL; 891191673Sjamie else if (error != 0) 892191673Sjamie goto done_free; 893191673Sjamie else { 894191673Sjamie if (flags & JAIL_UPDATE) { 895191673Sjamie error = EINVAL; 896191673Sjamie vfs_opterror(opts, 897191673Sjamie "path cannot be changed after creation"); 898191673Sjamie goto done_errmsg; 899191673Sjamie } 900191673Sjamie if (len == 0 || path[len - 1] != '\0') { 901191673Sjamie error = EINVAL; 902191673Sjamie goto done_free; 903191673Sjamie } 904230129Smm NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE, UIO_SYSSPACE, 905230129Smm path, td); 906230129Smm error = namei(&nd); 907230129Smm if (error) 908230129Smm goto done_free; 909230129Smm vfslocked = NDHASGIANT(&nd); 910230129Smm root = nd.ni_vp; 911230129Smm NDFREE(&nd, NDF_ONLY_PNBUF); 912230407Smm g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 913230407Smm strlcpy(g_path, path, MAXPATHLEN); 914230407Smm error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 915230407Smm if (error == 0) 916230407Smm path = g_path; 917230407Smm else if (error == ENODEV) { 918230129Smm /* proceed if sysctl debug.disablefullpath == 1 */ 919230129Smm fullpath_disabled = 1; 920230129Smm if (len < 2 || (len == 2 && path[0] == '/')) 921230129Smm path = NULL; 922230407Smm } else { 923230129Smm /* exit on other errors */ 924230129Smm VFS_UNLOCK_GIANT(vfslocked); 925230129Smm goto done_free; 926230129Smm } 927230129Smm if (root->v_type != VDIR) { 928230129Smm error = ENOTDIR; 929230129Smm vput(root); 930230129Smm VFS_UNLOCK_GIANT(vfslocked); 931230129Smm goto done_free; 932230129Smm } 933230129Smm VOP_UNLOCK(root, 0); 934230129Smm VFS_UNLOCK_GIANT(vfslocked); 935230129Smm if (fullpath_disabled) { 936192895Sjamie /* Leave room for a real-root full pathname. */ 937192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 938192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 939192895Sjamie error = ENAMETOOLONG; 940192895Sjamie goto done_free; 941192895Sjamie } 942191673Sjamie } 943191673Sjamie } 944185435Sbz 945191673Sjamie /* 946191673Sjamie * Grab the allprison lock before letting modules check their 947191673Sjamie * parameters. Once we have it, do not let go so we'll have a 948191673Sjamie * consistent view of the OSD list. 949191673Sjamie */ 950191673Sjamie sx_xlock(&allprison_lock); 951191673Sjamie error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 952191673Sjamie if (error) 953191673Sjamie goto done_unlock_list; 954185435Sbz 955191673Sjamie /* By now, all parameters should have been noted. */ 956191673Sjamie TAILQ_FOREACH(opt, opts, link) { 957191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 958191673Sjamie error = EINVAL; 959191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 960191673Sjamie goto done_unlock_list; 961191673Sjamie } 962191673Sjamie } 963191673Sjamie 964185435Sbz /* 965191673Sjamie * See if we are creating a new record or updating an existing one. 966191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 967185435Sbz */ 968191673Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 969191673Sjamie if (!cuflags) { 970191673Sjamie error = EINVAL; 971191673Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 972191673Sjamie goto done_unlock_list; 973191673Sjamie } 974191673Sjamie pr = NULL; 975196835Sjamie namelc = NULL; 976196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 977196835Sjamie namelc = strrchr(name, '.'); 978196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 979196835Sjamie if (*p != '\0') 980196835Sjamie jid = 0; 981196835Sjamie } 982191673Sjamie if (jid != 0) { 983192895Sjamie /* 984192895Sjamie * See if a requested jid already exists. There is an 985192895Sjamie * information leak here if the jid exists but is not within 986192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 987192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 988192895Sjamie * will return ENOENT which is not normally a valid error. 989192895Sjamie */ 990191673Sjamie if (jid < 0) { 991191673Sjamie error = EINVAL; 992191673Sjamie vfs_opterror(opts, "negative jid"); 993191673Sjamie goto done_unlock_list; 994191673Sjamie } 995191673Sjamie pr = prison_find(jid); 996191673Sjamie if (pr != NULL) { 997192895Sjamie ppr = pr->pr_parent; 998191673Sjamie /* Create: jid must not exist. */ 999191673Sjamie if (cuflags == JAIL_CREATE) { 1000191673Sjamie mtx_unlock(&pr->pr_mtx); 1001191673Sjamie error = EEXIST; 1002191673Sjamie vfs_opterror(opts, "jail %d already exists", 1003191673Sjamie jid); 1004191673Sjamie goto done_unlock_list; 1005191673Sjamie } 1006192895Sjamie if (!prison_ischild(mypr, pr)) { 1007192895Sjamie mtx_unlock(&pr->pr_mtx); 1008192895Sjamie pr = NULL; 1009192895Sjamie } else if (pr->pr_uref == 0) { 1010191673Sjamie if (!(flags & JAIL_DYING)) { 1011191673Sjamie mtx_unlock(&pr->pr_mtx); 1012191673Sjamie error = ENOENT; 1013191673Sjamie vfs_opterror(opts, "jail %d is dying", 1014191673Sjamie jid); 1015191673Sjamie goto done_unlock_list; 1016191673Sjamie } else if ((flags & JAIL_ATTACH) || 1017191673Sjamie (pr_flags & PR_PERSIST)) { 1018191673Sjamie /* 1019191673Sjamie * A dying jail might be resurrected 1020191673Sjamie * (via attach or persist), but first 1021191673Sjamie * it must determine if another jail 1022191673Sjamie * has claimed its name. Accomplish 1023191673Sjamie * this by implicitly re-setting the 1024191673Sjamie * name. 1025191673Sjamie */ 1026191673Sjamie if (name == NULL) 1027192895Sjamie name = prison_name(mypr, pr); 1028191673Sjamie } 1029191673Sjamie } 1030191673Sjamie } 1031191673Sjamie if (pr == NULL) { 1032191673Sjamie /* Update: jid must exist. */ 1033191673Sjamie if (cuflags == JAIL_UPDATE) { 1034191673Sjamie error = ENOENT; 1035191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1036191673Sjamie goto done_unlock_list; 1037191673Sjamie } 1038191673Sjamie } 1039191673Sjamie } 1040191673Sjamie /* 1041191673Sjamie * If the caller provided a name, look for a jail by that name. 1042191673Sjamie * This has different semantics for creates and updates keyed by jid 1043191673Sjamie * (where the name must not already exist in a different jail), 1044191673Sjamie * and updates keyed by the name itself (where the name must exist 1045191673Sjamie * because that is the jail being updated). 1046191673Sjamie */ 1047191673Sjamie if (name != NULL) { 1048196835Sjamie namelc = strrchr(name, '.'); 1049196835Sjamie if (namelc == NULL) 1050196835Sjamie namelc = name; 1051196835Sjamie else { 1052192895Sjamie /* 1053192895Sjamie * This is a hierarchical name. Split it into the 1054192895Sjamie * parent and child names, and make sure the parent 1055192895Sjamie * exists or matches an already found jail. 1056192895Sjamie */ 1057196835Sjamie *namelc = '\0'; 1058192895Sjamie if (pr != NULL) { 1059196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1060196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1061192895Sjamie mtx_unlock(&pr->pr_mtx); 1062192895Sjamie error = EINVAL; 1063192895Sjamie vfs_opterror(opts, 1064192895Sjamie "cannot change jail's parent"); 1065192895Sjamie goto done_unlock_list; 1066192895Sjamie } 1067192895Sjamie } else { 1068192895Sjamie ppr = prison_find_name(mypr, name); 1069192895Sjamie if (ppr == NULL) { 1070192895Sjamie error = ENOENT; 1071192895Sjamie vfs_opterror(opts, 1072192895Sjamie "jail \"%s\" not found", name); 1073192895Sjamie goto done_unlock_list; 1074192895Sjamie } 1075192895Sjamie mtx_unlock(&ppr->pr_mtx); 1076192895Sjamie } 1077196835Sjamie name = ++namelc; 1078192895Sjamie } 1079191673Sjamie if (name[0] != '\0') { 1080192895Sjamie namelen = 1081192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1082192895Sjamie name_again: 1083191673Sjamie deadpr = NULL; 1084192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1085191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1086192895Sjamie !strcmp(tpr->pr_name + namelen, name)) { 1087191673Sjamie if (pr == NULL && 1088191673Sjamie cuflags != JAIL_CREATE) { 1089191673Sjamie mtx_lock(&tpr->pr_mtx); 1090191673Sjamie if (tpr->pr_ref > 0) { 1091191673Sjamie /* 1092191673Sjamie * Use this jail 1093191673Sjamie * for updates. 1094191673Sjamie */ 1095191673Sjamie if (tpr->pr_uref > 0) { 1096191673Sjamie pr = tpr; 1097191673Sjamie break; 1098191673Sjamie } 1099191673Sjamie deadpr = tpr; 1100191673Sjamie } 1101191673Sjamie mtx_unlock(&tpr->pr_mtx); 1102191673Sjamie } else if (tpr->pr_uref > 0) { 1103191673Sjamie /* 1104191673Sjamie * Create, or update(jid): 1105191673Sjamie * name must not exist in an 1106192895Sjamie * active sibling jail. 1107191673Sjamie */ 1108191673Sjamie error = EEXIST; 1109191673Sjamie if (pr != NULL) 1110191673Sjamie mtx_unlock(&pr->pr_mtx); 1111191673Sjamie vfs_opterror(opts, 1112191673Sjamie "jail \"%s\" already exists", 1113191673Sjamie name); 1114191673Sjamie goto done_unlock_list; 1115191673Sjamie } 1116191673Sjamie } 1117191673Sjamie } 1118191673Sjamie /* If no active jail is found, use a dying one. */ 1119191673Sjamie if (deadpr != NULL && pr == NULL) { 1120191673Sjamie if (flags & JAIL_DYING) { 1121191673Sjamie mtx_lock(&deadpr->pr_mtx); 1122191673Sjamie if (deadpr->pr_ref == 0) { 1123191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1124191673Sjamie goto name_again; 1125191673Sjamie } 1126191673Sjamie pr = deadpr; 1127191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1128191673Sjamie error = ENOENT; 1129191673Sjamie vfs_opterror(opts, 1130191673Sjamie "jail \"%s\" is dying", name); 1131191673Sjamie goto done_unlock_list; 1132191673Sjamie } 1133191673Sjamie } 1134191673Sjamie /* Update: name must exist if no jid. */ 1135191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1136191673Sjamie error = ENOENT; 1137191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1138191673Sjamie name); 1139191673Sjamie goto done_unlock_list; 1140191673Sjamie } 1141191673Sjamie } 1142191673Sjamie } 1143191673Sjamie /* Update: must provide a jid or name. */ 1144191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1145191673Sjamie error = ENOENT; 1146191673Sjamie vfs_opterror(opts, "update specified no jail"); 1147191673Sjamie goto done_unlock_list; 1148191673Sjamie } 1149185435Sbz 1150191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1151191673Sjamie if (pr == NULL) { 1152194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1153194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1154194762Sjamie error = EPERM; 1155194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1156194762Sjamie goto done_unlock_list; 1157194762Sjamie } 1158191673Sjamie created = 1; 1159192895Sjamie mtx_lock(&ppr->pr_mtx); 1160192895Sjamie if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1161192895Sjamie mtx_unlock(&ppr->pr_mtx); 1162192895Sjamie error = ENOENT; 1163192895Sjamie vfs_opterror(opts, "parent jail went away!"); 1164192895Sjamie goto done_unlock_list; 1165192895Sjamie } 1166192895Sjamie ppr->pr_ref++; 1167192895Sjamie ppr->pr_uref++; 1168192895Sjamie mtx_unlock(&ppr->pr_mtx); 1169191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1170191673Sjamie if (jid == 0) { 1171191673Sjamie /* Find the next free jid. */ 1172191673Sjamie jid = lastprid + 1; 1173191673Sjamie findnext: 1174191673Sjamie if (jid == JAIL_MAX) 1175191673Sjamie jid = 1; 1176191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1177191673Sjamie if (tpr->pr_id < jid) 1178191673Sjamie continue; 1179191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1180191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1181191673Sjamie break; 1182191673Sjamie } 1183191673Sjamie if (jid == lastprid) { 1184191673Sjamie error = EAGAIN; 1185191673Sjamie vfs_opterror(opts, 1186191673Sjamie "no available jail IDs"); 1187191673Sjamie free(pr, M_PRISON); 1188192895Sjamie prison_deref(ppr, PD_DEREF | 1189192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1190192895Sjamie goto done_releroot; 1191191673Sjamie } 1192191673Sjamie jid++; 1193191673Sjamie goto findnext; 1194191673Sjamie } 1195191673Sjamie lastprid = jid; 1196191673Sjamie } else { 1197191673Sjamie /* 1198191673Sjamie * The jail already has a jid (that did not yet exist), 1199191673Sjamie * so just find where to insert it. 1200191673Sjamie */ 1201191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1202191673Sjamie if (tpr->pr_id >= jid) { 1203191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1204191673Sjamie break; 1205191673Sjamie } 1206191673Sjamie } 1207191673Sjamie if (tpr == NULL) 1208191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1209192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1210192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1211194762Sjamie tpr->pr_childcount++; 1212185435Sbz 1213192895Sjamie pr->pr_parent = ppr; 1214191673Sjamie pr->pr_id = jid; 1215192895Sjamie 1216192895Sjamie /* Set some default values, and inherit some from the parent. */ 1217191673Sjamie if (name == NULL) 1218191673Sjamie name = ""; 1219191673Sjamie if (path == NULL) { 1220191673Sjamie path = "/"; 1221192895Sjamie root = mypr->pr_root; 1222191673Sjamie vref(root); 1223191673Sjamie } 1224195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1225195944Sjamie pr->pr_flags |= PR_HOST; 1226195945Sjamie#if defined(INET) || defined(INET6) 1227195945Sjamie#ifdef VIMAGE 1228195945Sjamie if (!(pr_flags & PR_VNET)) 1229195945Sjamie#endif 1230195945Sjamie { 1231192895Sjamie#ifdef INET 1232195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1233195974Sjamie pr->pr_flags |= 1234195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1235195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1236195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1237195974Sjamie if (ppr->pr_ip4 != NULL) { 1238195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1239195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1240195974Sjamie sizeof(struct in_addr), M_PRISON, 1241195974Sjamie M_WAITOK); 1242195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1243195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1244195974Sjamie } 1245195974Sjamie } 1246192895Sjamie#endif 1247192895Sjamie#ifdef INET6 1248195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1249195974Sjamie pr->pr_flags |= 1250195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1251195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1252195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1253195974Sjamie if (ppr->pr_ip6 != NULL) { 1254195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1255195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1256195974Sjamie sizeof(struct in6_addr), M_PRISON, 1257195974Sjamie M_WAITOK); 1258195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1259195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1260195974Sjamie } 1261195974Sjamie } 1262192895Sjamie#endif 1263195945Sjamie } 1264195945Sjamie#endif 1265202468Sbz /* Source address selection is always on by default. */ 1266202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1267202468Sbz 1268192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1269192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1270196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1271191673Sjamie 1272192895Sjamie LIST_INIT(&pr->pr_children); 1273192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1274191673Sjamie 1275194251Sjamie#ifdef VIMAGE 1276194251Sjamie /* Allocate a new vnet if specified. */ 1277194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1278194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1279194251Sjamie#endif 1280185435Sbz /* 1281191673Sjamie * Allocate a dedicated cpuset for each jail. 1282191673Sjamie * Unlike other initial settings, this may return an erorr. 1283185435Sbz */ 1284192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1285191673Sjamie if (error) { 1286191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1287191673Sjamie goto done_releroot; 1288191673Sjamie } 1289185435Sbz 1290191673Sjamie mtx_lock(&pr->pr_mtx); 1291185435Sbz /* 1292191673Sjamie * New prisons do not yet have a reference, because we do not 1293191673Sjamie * want other to see the incomplete prison once the 1294191673Sjamie * allprison_lock is downgraded. 1295185435Sbz */ 1296191673Sjamie } else { 1297191673Sjamie created = 0; 1298195974Sjamie /* 1299195974Sjamie * Grab a reference for existing prisons, to ensure they 1300195974Sjamie * continue to exist for the duration of the call. 1301195974Sjamie */ 1302195974Sjamie pr->pr_ref++; 1303195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1304195945Sjamie if ((pr->pr_flags & PR_VNET) && 1305195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1306195945Sjamie error = EINVAL; 1307195945Sjamie vfs_opterror(opts, 1308195945Sjamie "vnet jails cannot have IP address restrictions"); 1309195945Sjamie goto done_deref_locked; 1310195945Sjamie } 1311195945Sjamie#endif 1312195974Sjamie#ifdef INET 1313195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1314195974Sjamie error = EINVAL; 1315195974Sjamie vfs_opterror(opts, 1316195974Sjamie "ip4 cannot be changed after creation"); 1317195974Sjamie goto done_deref_locked; 1318195974Sjamie } 1319195974Sjamie#endif 1320195974Sjamie#ifdef INET6 1321195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1322195974Sjamie error = EINVAL; 1323195974Sjamie vfs_opterror(opts, 1324195974Sjamie "ip6 cannot be changed after creation"); 1325195974Sjamie goto done_deref_locked; 1326195974Sjamie } 1327195974Sjamie#endif 1328191673Sjamie } 1329185435Sbz 1330191673Sjamie /* Do final error checking before setting anything. */ 1331192895Sjamie if (gotslevel) { 1332192895Sjamie if (slevel < ppr->pr_securelevel) { 1333192895Sjamie error = EPERM; 1334192895Sjamie goto done_deref_locked; 1335192895Sjamie } 1336192895Sjamie } 1337194762Sjamie if (gotchildmax) { 1338194762Sjamie if (childmax >= ppr->pr_childmax) { 1339194762Sjamie error = EPERM; 1340194762Sjamie goto done_deref_locked; 1341194762Sjamie } 1342194762Sjamie } 1343192895Sjamie if (gotenforce) { 1344192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1345192895Sjamie error = EPERM; 1346192895Sjamie goto done_deref_locked; 1347192895Sjamie } 1348192895Sjamie } 1349185435Sbz#ifdef INET 1350195974Sjamie if (ip4s > 0) { 1351192895Sjamie if (ppr->pr_flags & PR_IP4) { 1352195974Sjamie /* 1353195974Sjamie * Make sure the new set of IP addresses is a 1354195974Sjamie * subset of the parent's list. Don't worry 1355195974Sjamie * about the parent being unlocked, as any 1356195974Sjamie * setting is done with allprison_lock held. 1357195974Sjamie */ 1358195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1359195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1360195974Sjamie break; 1361195974Sjamie if (ij == ppr->pr_ip4s) { 1362195974Sjamie error = EPERM; 1363195974Sjamie goto done_deref_locked; 1364195974Sjamie } 1365195974Sjamie if (ip4s > 1) { 1366195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1367195974Sjamie if (ip4[ii].s_addr == 1368195974Sjamie ppr->pr_ip4[0].s_addr) 1369195974Sjamie continue; 1370195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1371195974Sjamie if (ip4[ii].s_addr == 1372195974Sjamie ppr->pr_ip4[ij].s_addr) 1373195974Sjamie break; 1374195974Sjamie if (ij == ppr->pr_ip4s) 1375195974Sjamie break; 1376192895Sjamie } 1377192895Sjamie if (ij == ppr->pr_ip4s) { 1378192895Sjamie error = EPERM; 1379192895Sjamie goto done_deref_locked; 1380192895Sjamie } 1381192895Sjamie } 1382192895Sjamie } 1383195974Sjamie /* 1384195974Sjamie * Check for conflicting IP addresses. We permit them 1385195974Sjamie * if there is no more than one IP on each jail. If 1386195974Sjamie * there is a duplicate on a jail with more than one 1387195974Sjamie * IP stop checking and return error. 1388195974Sjamie */ 1389195974Sjamie tppr = ppr; 1390195945Sjamie#ifdef VIMAGE 1391195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1392195974Sjamie if (tppr->pr_flags & PR_VNET) 1393195974Sjamie break; 1394195945Sjamie#endif 1395195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1396195974Sjamie if (tpr == pr || 1397195945Sjamie#ifdef VIMAGE 1398195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1399195945Sjamie#endif 1400195974Sjamie tpr->pr_uref == 0) { 1401192895Sjamie descend = 0; 1402195974Sjamie continue; 1403195974Sjamie } 1404195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1405195974Sjamie continue; 1406195974Sjamie descend = 0; 1407195974Sjamie if (tpr->pr_ip4 == NULL || 1408195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1409195974Sjamie continue; 1410195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1411195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1412195974Sjamie error = EADDRINUSE; 1413195974Sjamie vfs_opterror(opts, 1414195974Sjamie "IPv4 addresses clash"); 1415195974Sjamie goto done_deref_locked; 1416192895Sjamie } 1417192895Sjamie } 1418192895Sjamie } 1419192895Sjamie } 1420185435Sbz#endif 1421191673Sjamie#ifdef INET6 1422195974Sjamie if (ip6s > 0) { 1423192895Sjamie if (ppr->pr_flags & PR_IP6) { 1424195974Sjamie /* 1425195974Sjamie * Make sure the new set of IP addresses is a 1426195974Sjamie * subset of the parent's list. 1427195974Sjamie */ 1428195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1429195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1430195974Sjamie &ppr->pr_ip6[ij])) 1431195974Sjamie break; 1432195974Sjamie if (ij == ppr->pr_ip6s) { 1433195974Sjamie error = EPERM; 1434195974Sjamie goto done_deref_locked; 1435195974Sjamie } 1436195974Sjamie if (ip6s > 1) { 1437195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1438195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1439195974Sjamie &ppr->pr_ip6[0])) 1440195974Sjamie continue; 1441195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1442195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1443195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1444195974Sjamie break; 1445195974Sjamie if (ij == ppr->pr_ip6s) 1446195974Sjamie break; 1447192895Sjamie } 1448192895Sjamie if (ij == ppr->pr_ip6s) { 1449192895Sjamie error = EPERM; 1450192895Sjamie goto done_deref_locked; 1451192895Sjamie } 1452192895Sjamie } 1453192895Sjamie } 1454195974Sjamie /* Check for conflicting IP addresses. */ 1455195974Sjamie tppr = ppr; 1456195945Sjamie#ifdef VIMAGE 1457195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1458195974Sjamie if (tppr->pr_flags & PR_VNET) 1459195974Sjamie break; 1460195945Sjamie#endif 1461195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1462195974Sjamie if (tpr == pr || 1463195945Sjamie#ifdef VIMAGE 1464195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1465195945Sjamie#endif 1466195974Sjamie tpr->pr_uref == 0) { 1467192895Sjamie descend = 0; 1468195974Sjamie continue; 1469195974Sjamie } 1470195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1471195974Sjamie continue; 1472195974Sjamie descend = 0; 1473195974Sjamie if (tpr->pr_ip6 == NULL || 1474195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1475195974Sjamie continue; 1476195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1477195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1478195974Sjamie error = EADDRINUSE; 1479195974Sjamie vfs_opterror(opts, 1480195974Sjamie "IPv6 addresses clash"); 1481195974Sjamie goto done_deref_locked; 1482192895Sjamie } 1483192895Sjamie } 1484191673Sjamie } 1485192895Sjamie } 1486191673Sjamie#endif 1487192895Sjamie onamelen = namelen = 0; 1488192895Sjamie if (name != NULL) { 1489191673Sjamie /* Give a default name of the jid. */ 1490191673Sjamie if (name[0] == '\0') 1491191673Sjamie snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1492196835Sjamie else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid && 1493196835Sjamie *p == '\0')) { 1494191673Sjamie error = EINVAL; 1495196835Sjamie vfs_opterror(opts, 1496196835Sjamie "name cannot be numeric (unless it is the jid)"); 1497192895Sjamie goto done_deref_locked; 1498191673Sjamie } 1499191673Sjamie /* 1500192895Sjamie * Make sure the name isn't too long for the prison or its 1501192895Sjamie * children. 1502191673Sjamie */ 1503192895Sjamie onamelen = strlen(pr->pr_name); 1504192895Sjamie namelen = strlen(name); 1505192895Sjamie if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1506192895Sjamie error = ENAMETOOLONG; 1507192895Sjamie goto done_deref_locked; 1508192895Sjamie } 1509192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1510192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1511192895Sjamie sizeof(pr->pr_name)) { 1512192895Sjamie error = ENAMETOOLONG; 1513192895Sjamie goto done_deref_locked; 1514192895Sjamie } 1515192895Sjamie } 1516191673Sjamie } 1517192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1518192895Sjamie error = EPERM; 1519192895Sjamie goto done_deref_locked; 1520192895Sjamie } 1521185435Sbz 1522191673Sjamie /* Set the parameters of the prison. */ 1523191673Sjamie#ifdef INET 1524192895Sjamie redo_ip4 = 0; 1525195974Sjamie if (pr_flags & PR_IP4_USER) { 1526195974Sjamie pr->pr_flags |= PR_IP4; 1527195974Sjamie free(pr->pr_ip4, M_PRISON); 1528195974Sjamie pr->pr_ip4s = ip4s; 1529195974Sjamie pr->pr_ip4 = ip4; 1530195974Sjamie ip4 = NULL; 1531192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1532195945Sjamie#ifdef VIMAGE 1533195945Sjamie if (tpr->pr_flags & PR_VNET) { 1534195945Sjamie descend = 0; 1535195945Sjamie continue; 1536195945Sjamie } 1537195945Sjamie#endif 1538192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1539192895Sjamie redo_ip4 = 1; 1540192895Sjamie descend = 0; 1541192895Sjamie } 1542192895Sjamie } 1543185435Sbz } 1544191673Sjamie#endif 1545191673Sjamie#ifdef INET6 1546192895Sjamie redo_ip6 = 0; 1547195974Sjamie if (pr_flags & PR_IP6_USER) { 1548195974Sjamie pr->pr_flags |= PR_IP6; 1549195974Sjamie free(pr->pr_ip6, M_PRISON); 1550195974Sjamie pr->pr_ip6s = ip6s; 1551195974Sjamie pr->pr_ip6 = ip6; 1552195974Sjamie ip6 = NULL; 1553192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1554195945Sjamie#ifdef VIMAGE 1555195945Sjamie if (tpr->pr_flags & PR_VNET) { 1556195945Sjamie descend = 0; 1557195945Sjamie continue; 1558195945Sjamie } 1559195945Sjamie#endif 1560192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1561192895Sjamie redo_ip6 = 1; 1562192895Sjamie descend = 0; 1563192895Sjamie } 1564192895Sjamie } 1565191673Sjamie } 1566191673Sjamie#endif 1567192895Sjamie if (gotslevel) { 1568191673Sjamie pr->pr_securelevel = slevel; 1569192895Sjamie /* Set all child jails to be at least this level. */ 1570192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1571192895Sjamie if (tpr->pr_securelevel < slevel) 1572192895Sjamie tpr->pr_securelevel = slevel; 1573192895Sjamie } 1574194762Sjamie if (gotchildmax) { 1575194762Sjamie pr->pr_childmax = childmax; 1576194762Sjamie /* Set all child jails to under this limit. */ 1577194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1578194762Sjamie if (tpr->pr_childmax > childmax - level) 1579194762Sjamie tpr->pr_childmax = childmax > level 1580194762Sjamie ? childmax - level : 0; 1581194762Sjamie } 1582192895Sjamie if (gotenforce) { 1583192895Sjamie pr->pr_enforce_statfs = enforce; 1584192895Sjamie /* Pass this restriction on to the children. */ 1585192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1586192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1587192895Sjamie tpr->pr_enforce_statfs = enforce; 1588192895Sjamie } 1589192895Sjamie if (name != NULL) { 1590192895Sjamie if (ppr == &prison0) 1591192895Sjamie strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1592192895Sjamie else 1593192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1594192895Sjamie ppr->pr_name, name); 1595192895Sjamie /* Change this component of child names. */ 1596192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1597192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1598192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1599192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1600192895Sjamie } 1601192895Sjamie } 1602191673Sjamie if (path != NULL) { 1603192895Sjamie /* Try to keep a real-rooted full pathname. */ 1604230129Smm if (fullpath_disabled && path[0] == '/' && 1605230129Smm strcmp(mypr->pr_path, "/")) 1606192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1607192895Sjamie mypr->pr_path, path); 1608192895Sjamie else 1609192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1610191673Sjamie pr->pr_root = root; 1611191673Sjamie } 1612193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1613193066Sjamie if (pr->pr_flags & PR_HOST) { 1614193066Sjamie /* 1615193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1616193066Sjamie * the lack of a lock on the parent is not a problem; 1617193066Sjamie * it is always set with allprison_lock at least 1618193066Sjamie * shared, and is held exclusively here. 1619193066Sjamie */ 1620194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1621194118Sjamie sizeof(pr->pr_hostname)); 1622194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1623194118Sjamie sizeof(pr->pr_domainname)); 1624194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1625194118Sjamie sizeof(pr->pr_hostuuid)); 1626193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1627193066Sjamie } 1628193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1629193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1630193066Sjamie if (host != NULL) 1631194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1632193066Sjamie if (domain != NULL) 1633194118Sjamie strlcpy(pr->pr_domainname, domain, 1634194118Sjamie sizeof(pr->pr_domainname)); 1635193066Sjamie if (uuid != NULL) 1636194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1637193066Sjamie if (gothid) 1638193066Sjamie pr->pr_hostid = hid; 1639193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1640193066Sjamie if (tpr->pr_flags & PR_HOST) 1641193066Sjamie descend = 0; 1642193066Sjamie else { 1643193066Sjamie if (host != NULL) 1644194118Sjamie strlcpy(tpr->pr_hostname, 1645194118Sjamie pr->pr_hostname, 1646194118Sjamie sizeof(tpr->pr_hostname)); 1647193066Sjamie if (domain != NULL) 1648194118Sjamie strlcpy(tpr->pr_domainname, 1649194118Sjamie pr->pr_domainname, 1650194118Sjamie sizeof(tpr->pr_domainname)); 1651193066Sjamie if (uuid != NULL) 1652194118Sjamie strlcpy(tpr->pr_hostuuid, 1653194118Sjamie pr->pr_hostuuid, 1654194118Sjamie sizeof(tpr->pr_hostuuid)); 1655193066Sjamie if (gothid) 1656193066Sjamie tpr->pr_hostid = hid; 1657193066Sjamie } 1658193066Sjamie } 1659193066Sjamie } 1660192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1661192895Sjamie /* Clear allow bits in all children. */ 1662192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1663192895Sjamie tpr->pr_allow &= ~tallow; 1664192895Sjamie } 1665192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1666191673Sjamie /* 1667191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1668191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1669191673Sjamie * for now, so new ones will remain unseen until after the module 1670191673Sjamie * handlers have completed. 1671191673Sjamie */ 1672191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1673191673Sjamie if (pr_flags & PR_PERSIST) { 1674191673Sjamie pr->pr_ref++; 1675191673Sjamie pr->pr_uref++; 1676191673Sjamie } else { 1677191673Sjamie pr->pr_ref--; 1678191673Sjamie pr->pr_uref--; 1679191673Sjamie } 1680191673Sjamie } 1681191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1682191673Sjamie mtx_unlock(&pr->pr_mtx); 1683185435Sbz 1684221362Strasz#ifdef RACCT 1685221362Strasz if (created) 1686221362Strasz prison_racct_attach(pr); 1687221362Strasz#endif 1688221362Strasz 1689192895Sjamie /* Locks may have prevented a complete restriction of child IP 1690192895Sjamie * addresses. If so, allocate some more memory and try again. 1691192895Sjamie */ 1692192895Sjamie#ifdef INET 1693192895Sjamie while (redo_ip4) { 1694192895Sjamie ip4s = pr->pr_ip4s; 1695192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1696192895Sjamie mtx_lock(&pr->pr_mtx); 1697192895Sjamie redo_ip4 = 0; 1698192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1699195945Sjamie#ifdef VIMAGE 1700195945Sjamie if (tpr->pr_flags & PR_VNET) { 1701195945Sjamie descend = 0; 1702195945Sjamie continue; 1703195945Sjamie } 1704195945Sjamie#endif 1705192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1706192895Sjamie if (ip4 != NULL) 1707192895Sjamie ip4 = NULL; 1708192895Sjamie else 1709192895Sjamie redo_ip4 = 1; 1710192895Sjamie } 1711192895Sjamie } 1712192895Sjamie mtx_unlock(&pr->pr_mtx); 1713192895Sjamie } 1714192895Sjamie#endif 1715192895Sjamie#ifdef INET6 1716192895Sjamie while (redo_ip6) { 1717192895Sjamie ip6s = pr->pr_ip6s; 1718192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1719192895Sjamie mtx_lock(&pr->pr_mtx); 1720192895Sjamie redo_ip6 = 0; 1721192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1722195945Sjamie#ifdef VIMAGE 1723195945Sjamie if (tpr->pr_flags & PR_VNET) { 1724195945Sjamie descend = 0; 1725195945Sjamie continue; 1726195945Sjamie } 1727195945Sjamie#endif 1728192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1729192895Sjamie if (ip6 != NULL) 1730192895Sjamie ip6 = NULL; 1731192895Sjamie else 1732192895Sjamie redo_ip6 = 1; 1733192895Sjamie } 1734192895Sjamie } 1735192895Sjamie mtx_unlock(&pr->pr_mtx); 1736192895Sjamie } 1737192895Sjamie#endif 1738192895Sjamie 1739191673Sjamie /* Let the modules do their work. */ 1740191673Sjamie sx_downgrade(&allprison_lock); 1741191673Sjamie if (created) { 1742191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1743191673Sjamie if (error) { 1744191673Sjamie prison_deref(pr, PD_LIST_SLOCKED); 1745191673Sjamie goto done_errmsg; 1746191673Sjamie } 1747191673Sjamie } 1748191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1749191673Sjamie if (error) { 1750191673Sjamie prison_deref(pr, created 1751191673Sjamie ? PD_LIST_SLOCKED 1752191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1753191673Sjamie goto done_errmsg; 1754191673Sjamie } 1755191673Sjamie 1756191673Sjamie /* Attach this process to the prison if requested. */ 1757191673Sjamie if (flags & JAIL_ATTACH) { 1758191673Sjamie mtx_lock(&pr->pr_mtx); 1759191673Sjamie error = do_jail_attach(td, pr); 1760191673Sjamie if (error) { 1761191673Sjamie vfs_opterror(opts, "attach failed"); 1762191673Sjamie if (!created) 1763191673Sjamie prison_deref(pr, PD_DEREF); 1764191673Sjamie goto done_errmsg; 1765191673Sjamie } 1766191673Sjamie } 1767191673Sjamie 1768191673Sjamie /* 1769191673Sjamie * Now that it is all there, drop the temporary reference from existing 1770191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1771191673Sjamie * (which was not done earlier so that the prison would not be publicly 1772191673Sjamie * visible). 1773191673Sjamie */ 1774191673Sjamie if (!created) { 1775191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1776191673Sjamie ? PD_DEREF 1777191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1778191673Sjamie } else { 1779191673Sjamie if (pr_flags & PR_PERSIST) { 1780191673Sjamie mtx_lock(&pr->pr_mtx); 1781191673Sjamie pr->pr_ref++; 1782191673Sjamie pr->pr_uref++; 1783191673Sjamie mtx_unlock(&pr->pr_mtx); 1784191673Sjamie } 1785191673Sjamie if (!(flags & JAIL_ATTACH)) 1786191673Sjamie sx_sunlock(&allprison_lock); 1787191673Sjamie } 1788191673Sjamie td->td_retval[0] = pr->pr_id; 1789191673Sjamie goto done_errmsg; 1790191673Sjamie 1791192895Sjamie done_deref_locked: 1792192895Sjamie prison_deref(pr, created 1793192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1794192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1795192895Sjamie goto done_releroot; 1796191673Sjamie done_unlock_list: 1797191673Sjamie sx_xunlock(&allprison_lock); 1798191673Sjamie done_releroot: 1799191673Sjamie if (root != NULL) { 1800191673Sjamie vfslocked = VFS_LOCK_GIANT(root->v_mount); 1801191673Sjamie vrele(root); 1802191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 1803191673Sjamie } 1804191673Sjamie done_errmsg: 1805191673Sjamie if (error) { 1806191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1807191673Sjamie if (errmsg_len > 0) { 1808191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1809191673Sjamie if (errmsg_pos > 0) { 1810191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1811191673Sjamie bcopy(errmsg, 1812191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1813191673Sjamie errmsg_len); 1814191673Sjamie else 1815191673Sjamie copyout(errmsg, 1816191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1817191673Sjamie errmsg_len); 1818191673Sjamie } 1819191673Sjamie } 1820191673Sjamie } 1821191673Sjamie done_free: 1822191673Sjamie#ifdef INET 1823191673Sjamie free(ip4, M_PRISON); 1824191673Sjamie#endif 1825191673Sjamie#ifdef INET6 1826191673Sjamie free(ip6, M_PRISON); 1827191673Sjamie#endif 1828230407Smm if (g_path != NULL) 1829230407Smm free(g_path, M_TEMP); 1830191673Sjamie vfs_freeopts(opts); 1831191673Sjamie return (error); 1832191673Sjamie} 1833191673Sjamie 1834191673Sjamie 183582710Sdillon/* 1836191673Sjamie * struct jail_get_args { 1837191673Sjamie * struct iovec *iovp; 1838191673Sjamie * unsigned int iovcnt; 1839191673Sjamie * int flags; 1840114168Smike * }; 184182710Sdillon */ 184246155Sphkint 1843225617Skmacysys_jail_get(struct thread *td, struct jail_get_args *uap) 184446155Sphk{ 1845191673Sjamie struct uio *auio; 1846185435Sbz int error; 1847185435Sbz 1848191673Sjamie /* Check that we have an even number of iovecs. */ 1849191673Sjamie if (uap->iovcnt & 1) 1850191673Sjamie return (EINVAL); 1851191673Sjamie 1852191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1853185435Sbz if (error) 1854185435Sbz return (error); 1855191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1856191673Sjamie if (error == 0) 1857191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1858191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1859191673Sjamie free(auio, M_IOV); 1860191673Sjamie return (error); 1861191673Sjamie} 1862185435Sbz 1863191673Sjamieint 1864191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 1865191673Sjamie{ 1866192895Sjamie struct prison *pr, *mypr; 1867191673Sjamie struct vfsopt *opt; 1868191673Sjamie struct vfsoptlist *opts; 1869191673Sjamie char *errmsg, *name; 1870192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1871185435Sbz 1872191673Sjamie if (flags & ~JAIL_GET_MASK) 1873191673Sjamie return (EINVAL); 1874185435Sbz 1875191673Sjamie /* Get the parameter list. */ 1876191673Sjamie error = vfs_buildopts(optuio, &opts); 1877191673Sjamie if (error) 1878191673Sjamie return (error); 1879191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1880192895Sjamie mypr = td->td_ucred->cr_prison; 1881185435Sbz 1882191673Sjamie /* 1883191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 1884191673Sjamie */ 1885191673Sjamie sx_slock(&allprison_lock); 1886191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1887191673Sjamie if (error == 0) { 1888191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 1889192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1890191673Sjamie mtx_lock(&pr->pr_mtx); 1891191673Sjamie if (pr->pr_ref > 0 && 1892191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1893191673Sjamie break; 1894191673Sjamie mtx_unlock(&pr->pr_mtx); 1895191673Sjamie } 1896191673Sjamie } 1897191673Sjamie if (pr != NULL) 1898191673Sjamie goto found_prison; 1899191673Sjamie error = ENOENT; 1900191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 1901191673Sjamie goto done_unlock_list; 1902191673Sjamie } else if (error != ENOENT) 1903191673Sjamie goto done_unlock_list; 1904185435Sbz 1905191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1906191673Sjamie if (error == 0) { 1907191673Sjamie if (jid != 0) { 1908192895Sjamie pr = prison_find_child(mypr, jid); 1909191673Sjamie if (pr != NULL) { 1910191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1911191673Sjamie mtx_unlock(&pr->pr_mtx); 1912191673Sjamie error = ENOENT; 1913191673Sjamie vfs_opterror(opts, "jail %d is dying", 1914191673Sjamie jid); 1915191673Sjamie goto done_unlock_list; 1916191673Sjamie } 1917191673Sjamie goto found_prison; 1918191673Sjamie } 1919191673Sjamie error = ENOENT; 1920191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1921191673Sjamie goto done_unlock_list; 1922191673Sjamie } 1923191673Sjamie } else if (error != ENOENT) 1924191673Sjamie goto done_unlock_list; 192546155Sphk 1926191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 1927191673Sjamie if (error == 0) { 1928191673Sjamie if (len == 0 || name[len - 1] != '\0') { 1929191673Sjamie error = EINVAL; 1930191673Sjamie goto done_unlock_list; 1931191673Sjamie } 1932192895Sjamie pr = prison_find_name(mypr, name); 1933191673Sjamie if (pr != NULL) { 1934191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1935191673Sjamie mtx_unlock(&pr->pr_mtx); 1936191673Sjamie error = ENOENT; 1937191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 1938191673Sjamie name); 1939191673Sjamie goto done_unlock_list; 1940191673Sjamie } 1941191673Sjamie goto found_prison; 1942191673Sjamie } 1943191673Sjamie error = ENOENT; 1944191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 1945191673Sjamie goto done_unlock_list; 1946191673Sjamie } else if (error != ENOENT) 1947191673Sjamie goto done_unlock_list; 1948185435Sbz 1949191673Sjamie vfs_opterror(opts, "no jail specified"); 1950191673Sjamie error = ENOENT; 1951191673Sjamie goto done_unlock_list; 1952191673Sjamie 1953191673Sjamie found_prison: 1954191673Sjamie /* Get the parameters of the prison. */ 1955191673Sjamie pr->pr_ref++; 1956191673Sjamie locked = PD_LOCKED; 1957191673Sjamie td->td_retval[0] = pr->pr_id; 1958191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 1959191673Sjamie if (error != 0 && error != ENOENT) 1960191673Sjamie goto done_deref; 1961192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 1962192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 1963191673Sjamie if (error != 0 && error != ENOENT) 1964191673Sjamie goto done_deref; 1965192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 1966192895Sjamie if (error != 0 && error != ENOENT) 1967192895Sjamie goto done_deref; 1968192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 1969191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 1970191673Sjamie if (error != 0 && error != ENOENT) 1971191673Sjamie goto done_deref; 1972192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 1973191673Sjamie if (error != 0 && error != ENOENT) 1974191673Sjamie goto done_deref; 1975191673Sjamie#ifdef INET 1976191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 1977191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1978191673Sjamie if (error != 0 && error != ENOENT) 1979191673Sjamie goto done_deref; 1980191673Sjamie#endif 1981191673Sjamie#ifdef INET6 1982191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 1983191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1984191673Sjamie if (error != 0 && error != ENOENT) 1985191673Sjamie goto done_deref; 1986191673Sjamie#endif 1987191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 1988191673Sjamie sizeof(pr->pr_securelevel)); 1989191673Sjamie if (error != 0 && error != ENOENT) 1990191673Sjamie goto done_deref; 1991194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 1992194762Sjamie sizeof(pr->pr_childcount)); 1993194762Sjamie if (error != 0 && error != ENOENT) 1994194762Sjamie goto done_deref; 1995194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 1996194762Sjamie sizeof(pr->pr_childmax)); 1997194762Sjamie if (error != 0 && error != ENOENT) 1998194762Sjamie goto done_deref; 1999194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2000191673Sjamie if (error != 0 && error != ENOENT) 2001191673Sjamie goto done_deref; 2002194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2003193066Sjamie if (error != 0 && error != ENOENT) 2004193066Sjamie goto done_deref; 2005194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2006193066Sjamie if (error != 0 && error != ENOENT) 2007193066Sjamie goto done_deref; 2008205014Snwhitehorn#ifdef COMPAT_FREEBSD32 2009217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2010193066Sjamie uint32_t hid32 = pr->pr_hostid; 2011193066Sjamie 2012193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2013193066Sjamie } else 2014193066Sjamie#endif 2015193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2016193066Sjamie sizeof(pr->pr_hostid)); 2017193066Sjamie if (error != 0 && error != ENOENT) 2018193066Sjamie goto done_deref; 2019192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2020192895Sjamie sizeof(pr->pr_enforce_statfs)); 2021191673Sjamie if (error != 0 && error != ENOENT) 2022191673Sjamie goto done_deref; 2023192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2024192895Sjamie fi++) { 2025192895Sjamie if (pr_flag_names[fi] == NULL) 2026192895Sjamie continue; 2027192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2028192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2029192895Sjamie if (error != 0 && error != ENOENT) 2030192895Sjamie goto done_deref; 2031192895Sjamie i = !i; 2032192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2033192895Sjamie if (error != 0 && error != ENOENT) 2034192895Sjamie goto done_deref; 2035192895Sjamie } 2036195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2037195870Sjamie fi++) { 2038195870Sjamie i = pr->pr_flags & 2039195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2040195870Sjamie i = pr_flag_jailsys[fi].disable && 2041195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2042195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2043195870Sjamie : JAIL_SYS_INHERIT; 2044195870Sjamie error = 2045195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2046195870Sjamie if (error != 0 && error != ENOENT) 2047195870Sjamie goto done_deref; 2048195870Sjamie } 2049192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2050192895Sjamie fi++) { 2051192895Sjamie if (pr_allow_names[fi] == NULL) 2052192895Sjamie continue; 2053192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2054192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2055192895Sjamie if (error != 0 && error != ENOENT) 2056192895Sjamie goto done_deref; 2057192895Sjamie i = !i; 2058192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2059192895Sjamie if (error != 0 && error != ENOENT) 2060192895Sjamie goto done_deref; 2061192895Sjamie } 2062191673Sjamie i = (pr->pr_uref == 0); 2063191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2064191673Sjamie if (error != 0 && error != ENOENT) 2065191673Sjamie goto done_deref; 2066191673Sjamie i = !i; 2067191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2068191673Sjamie if (error != 0 && error != ENOENT) 2069191673Sjamie goto done_deref; 2070191673Sjamie 2071191673Sjamie /* Get the module parameters. */ 2072191673Sjamie mtx_unlock(&pr->pr_mtx); 2073191673Sjamie locked = 0; 2074191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 207546155Sphk if (error) 2076191673Sjamie goto done_deref; 2077191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 207884828Sjhb 2079191673Sjamie /* By now, all parameters should have been noted. */ 2080191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2081191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2082191673Sjamie error = EINVAL; 2083191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2084191673Sjamie goto done_errmsg; 2085191673Sjamie } 2086185435Sbz } 2087191673Sjamie 2088191673Sjamie /* Write the fetched parameters back to userspace. */ 2089191673Sjamie error = 0; 2090191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2091191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2092191673Sjamie pos = 2 * opt->pos + 1; 2093191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2094191673Sjamie if (opt->value != NULL) { 2095191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2096191673Sjamie bcopy(opt->value, 2097191673Sjamie optuio->uio_iov[pos].iov_base, 2098191673Sjamie opt->len); 2099191673Sjamie } else { 2100191673Sjamie error = copyout(opt->value, 2101191673Sjamie optuio->uio_iov[pos].iov_base, 2102191673Sjamie opt->len); 2103191673Sjamie if (error) 2104191673Sjamie break; 2105191673Sjamie } 2106191673Sjamie } 2107191673Sjamie } 2108185435Sbz } 2109191673Sjamie goto done_errmsg; 2110191673Sjamie 2111191673Sjamie done_deref: 2112191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2113191673Sjamie goto done_errmsg; 2114191673Sjamie 2115191673Sjamie done_unlock_list: 2116191673Sjamie sx_sunlock(&allprison_lock); 2117191673Sjamie done_errmsg: 2118191673Sjamie if (error && errmsg_pos >= 0) { 2119191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2120191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2121191673Sjamie if (errmsg_len > 0) { 2122191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2123191673Sjamie bcopy(errmsg, 2124191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2125191673Sjamie errmsg_len); 2126191673Sjamie else 2127191673Sjamie copyout(errmsg, 2128191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2129191673Sjamie errmsg_len); 2130191673Sjamie } 2131185435Sbz } 2132191673Sjamie vfs_freeopts(opts); 2133191673Sjamie return (error); 2134191673Sjamie} 2135113275Smike 2136192895Sjamie 2137191673Sjamie/* 2138191673Sjamie * struct jail_remove_args { 2139191673Sjamie * int jid; 2140191673Sjamie * }; 2141191673Sjamie */ 2142191673Sjamieint 2143225617Skmacysys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2144191673Sjamie{ 2145192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2146192895Sjamie int descend, error; 2147185435Sbz 2148191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2149185435Sbz if (error) 2150191673Sjamie return (error); 2151185435Sbz 2152185435Sbz sx_xlock(&allprison_lock); 2153192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2154191673Sjamie if (pr == NULL) { 2155185435Sbz sx_xunlock(&allprison_lock); 2156191673Sjamie return (EINVAL); 2157185435Sbz } 2158185435Sbz 2159192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2160192895Sjamie pr->pr_ref++; 2161192895Sjamie pr->pr_flags |= PR_REMOVE; 2162192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2163192895Sjamie mtx_unlock(&pr->pr_mtx); 2164192895Sjamie lpr = NULL; 2165192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2166192895Sjamie mtx_lock(&cpr->pr_mtx); 2167192895Sjamie if (cpr->pr_ref > 0) { 2168192895Sjamie tpr = cpr; 2169192895Sjamie cpr->pr_ref++; 2170192895Sjamie cpr->pr_flags |= PR_REMOVE; 2171192895Sjamie } else { 2172192895Sjamie /* Already removed - do not do it again. */ 2173192895Sjamie tpr = NULL; 2174192895Sjamie } 2175192895Sjamie mtx_unlock(&cpr->pr_mtx); 2176192895Sjamie if (lpr != NULL) { 2177192895Sjamie mtx_lock(&lpr->pr_mtx); 2178192895Sjamie prison_remove_one(lpr); 2179192895Sjamie sx_xlock(&allprison_lock); 2180192895Sjamie } 2181192895Sjamie lpr = tpr; 2182192895Sjamie } 2183192895Sjamie if (lpr != NULL) { 2184192895Sjamie mtx_lock(&lpr->pr_mtx); 2185192895Sjamie prison_remove_one(lpr); 2186192895Sjamie sx_xlock(&allprison_lock); 2187192895Sjamie } 2188192895Sjamie mtx_lock(&pr->pr_mtx); 2189192895Sjamie } 2190192895Sjamie prison_remove_one(pr); 2191192895Sjamie return (0); 2192192895Sjamie} 2193192895Sjamie 2194192895Sjamiestatic void 2195192895Sjamieprison_remove_one(struct prison *pr) 2196192895Sjamie{ 2197192895Sjamie struct proc *p; 2198192895Sjamie int deuref; 2199192895Sjamie 2200191673Sjamie /* If the prison was persistent, it is not anymore. */ 2201191673Sjamie deuref = 0; 2202191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2203191673Sjamie pr->pr_ref--; 2204191673Sjamie deuref = PD_DEUREF; 2205191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2206179881Sdelphij } 2207113275Smike 2208192895Sjamie /* 2209192895Sjamie * jail_remove added a reference. If that's the only one, remove 2210192895Sjamie * the prison now. 2211192895Sjamie */ 2212192895Sjamie KASSERT(pr->pr_ref > 0, 2213192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2214192895Sjamie if (pr->pr_ref == 1) { 2215191673Sjamie prison_deref(pr, 2216191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2217192895Sjamie return; 2218191673Sjamie } 2219191673Sjamie 2220113275Smike mtx_unlock(&pr->pr_mtx); 2221191673Sjamie sx_xunlock(&allprison_lock); 2222191673Sjamie /* 2223191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2224191673Sjamie */ 2225191673Sjamie sx_slock(&allproc_lock); 2226191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2227191673Sjamie PROC_LOCK(p); 2228191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2229191673Sjamie p->p_ucred->cr_prison == pr) 2230225617Skmacy kern_psignal(p, SIGKILL); 2231191673Sjamie PROC_UNLOCK(p); 2232191673Sjamie } 2233191673Sjamie sx_sunlock(&allproc_lock); 2234192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2235191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2236113275Smike} 2237113275Smike 2238190466Sjamie 2239113275Smike/* 2240114168Smike * struct jail_attach_args { 2241114168Smike * int jid; 2242114168Smike * }; 2243113275Smike */ 2244113275Smikeint 2245225617Skmacysys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2246113275Smike{ 2247113275Smike struct prison *pr; 2248191673Sjamie int error; 2249167309Spjd 2250164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2251126023Snectar if (error) 2252126023Snectar return (error); 2253126023Snectar 2254168401Spjd sx_slock(&allprison_lock); 2255192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2256113275Smike if (pr == NULL) { 2257168401Spjd sx_sunlock(&allprison_lock); 2258113275Smike return (EINVAL); 2259113275Smike } 2260185435Sbz 2261185435Sbz /* 2262185435Sbz * Do not allow a process to attach to a prison that is not 2263191673Sjamie * considered to be "alive". 2264185435Sbz */ 2265191673Sjamie if (pr->pr_uref == 0) { 2266185435Sbz mtx_unlock(&pr->pr_mtx); 2267185435Sbz sx_sunlock(&allprison_lock); 2268185435Sbz return (EINVAL); 2269185435Sbz } 2270191673Sjamie 2271191673Sjamie return (do_jail_attach(td, pr)); 2272191673Sjamie} 2273191673Sjamie 2274191673Sjamiestatic int 2275191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2276191673Sjamie{ 2277192895Sjamie struct prison *ppr; 2278191673Sjamie struct proc *p; 2279191673Sjamie struct ucred *newcred, *oldcred; 2280191673Sjamie int vfslocked, error; 2281191673Sjamie 2282191673Sjamie /* 2283191673Sjamie * XXX: Note that there is a slight race here if two threads 2284191673Sjamie * in the same privileged process attempt to attach to two 2285191673Sjamie * different jails at the same time. It is important for 2286191673Sjamie * user processes not to do this, or they might end up with 2287191673Sjamie * a process root from one prison, but attached to the jail 2288191673Sjamie * of another. 2289191673Sjamie */ 2290113275Smike pr->pr_ref++; 2291191673Sjamie pr->pr_uref++; 2292113275Smike mtx_unlock(&pr->pr_mtx); 2293191673Sjamie 2294191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2295191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2296191673Sjamie if (error) { 2297191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2298191673Sjamie return (error); 2299191673Sjamie } 2300168401Spjd sx_sunlock(&allprison_lock); 2301113275Smike 2302185435Sbz /* 2303185435Sbz * Reparent the newly attached process to this jail. 2304185435Sbz */ 2305192895Sjamie ppr = td->td_ucred->cr_prison; 2306191673Sjamie p = td->td_proc; 2307185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2308185435Sbz if (error) 2309191673Sjamie goto e_revert_osd; 2310185435Sbz 2311150652Scsjp vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2312175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2313113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2314113275Smike goto e_unlock; 2315113275Smike#ifdef MAC 2316172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2317113275Smike goto e_unlock; 2318113275Smike#endif 2319175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2320191673Sjamie if ((error = change_root(pr->pr_root, td))) 2321191673Sjamie goto e_unlock_giant; 2322150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2323113275Smike 232484828Sjhb newcred = crget(); 232584828Sjhb PROC_LOCK(p); 232684828Sjhb oldcred = p->p_ucred; 2327113275Smike setsugid(p); 232884828Sjhb crcopy(newcred, oldcred); 2329113630Sjhb newcred->cr_prison = pr; 233084828Sjhb p->p_ucred = newcred; 233184828Sjhb PROC_UNLOCK(p); 2332220137Strasz#ifdef RACCT 2333220137Strasz racct_proc_ucred_changed(p, oldcred, newcred); 2334220137Strasz#endif 233584828Sjhb crfree(oldcred); 2336192895Sjamie prison_deref(ppr, PD_DEREF | PD_DEUREF); 233746155Sphk return (0); 2338191673Sjamie e_unlock: 2339175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2340191673Sjamie e_unlock_giant: 2341150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2342191673Sjamie e_revert_osd: 2343191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2344192895Sjamie (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2345191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 234646155Sphk return (error); 234746155Sphk} 234846155Sphk 2349192895Sjamie 2350113275Smike/* 2351113275Smike * Returns a locked prison instance, or NULL on failure. 2352113275Smike */ 2353168399Spjdstruct prison * 2354113275Smikeprison_find(int prid) 2355113275Smike{ 2356113275Smike struct prison *pr; 2357113275Smike 2358168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2359191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2360113275Smike if (pr->pr_id == prid) { 2361113275Smike mtx_lock(&pr->pr_mtx); 2362191673Sjamie if (pr->pr_ref > 0) 2363191673Sjamie return (pr); 2364191673Sjamie mtx_unlock(&pr->pr_mtx); 2365113275Smike } 2366113275Smike } 2367113275Smike return (NULL); 2368113275Smike} 2369113275Smike 2370191673Sjamie/* 2371192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2372191673Sjamie */ 2373191673Sjamiestruct prison * 2374192895Sjamieprison_find_child(struct prison *mypr, int prid) 2375191673Sjamie{ 2376192895Sjamie struct prison *pr; 2377192895Sjamie int descend; 2378192895Sjamie 2379192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2380192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2381192895Sjamie if (pr->pr_id == prid) { 2382192895Sjamie mtx_lock(&pr->pr_mtx); 2383192895Sjamie if (pr->pr_ref > 0) 2384192895Sjamie return (pr); 2385192895Sjamie mtx_unlock(&pr->pr_mtx); 2386192895Sjamie } 2387192895Sjamie } 2388192895Sjamie return (NULL); 2389192895Sjamie} 2390192895Sjamie 2391192895Sjamie/* 2392192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2393192895Sjamie */ 2394192895Sjamiestruct prison * 2395192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2396192895Sjamie{ 2397191673Sjamie struct prison *pr, *deadpr; 2398192895Sjamie size_t mylen; 2399192895Sjamie int descend; 2400191673Sjamie 2401191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2402192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2403191673Sjamie again: 2404191673Sjamie deadpr = NULL; 2405192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2406192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2407191673Sjamie mtx_lock(&pr->pr_mtx); 2408191673Sjamie if (pr->pr_ref > 0) { 2409191673Sjamie if (pr->pr_uref > 0) 2410191673Sjamie return (pr); 2411191673Sjamie deadpr = pr; 2412191673Sjamie } 2413191673Sjamie mtx_unlock(&pr->pr_mtx); 2414191673Sjamie } 2415191673Sjamie } 2416192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2417191673Sjamie if (deadpr != NULL) { 2418191673Sjamie mtx_lock(&deadpr->pr_mtx); 2419191673Sjamie if (deadpr->pr_ref == 0) { 2420191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2421191673Sjamie goto again; 2422191673Sjamie } 2423191673Sjamie } 2424191673Sjamie return (deadpr); 2425191673Sjamie} 2426191673Sjamie 2427191673Sjamie/* 2428192895Sjamie * See if a prison has the specific flag set. 2429192895Sjamie */ 2430192895Sjamieint 2431192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2432192895Sjamie{ 2433192895Sjamie 2434192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2435192895Sjamie return (cred->cr_prison->pr_flags & flag); 2436192895Sjamie} 2437192895Sjamie 2438192895Sjamieint 2439192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2440192895Sjamie{ 2441192895Sjamie 2442192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2443192895Sjamie return (cred->cr_prison->pr_allow & flag); 2444192895Sjamie} 2445192895Sjamie 2446192895Sjamie/* 2447191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2448191673Sjamie * prison itself - but not in this context in case there are locks held. 2449191673Sjamie */ 245072786Srwatsonvoid 2451185029Spjdprison_free_locked(struct prison *pr) 245272786Srwatson{ 245372786Srwatson 2454185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 245572786Srwatson pr->pr_ref--; 245672786Srwatson if (pr->pr_ref == 0) { 2457168483Spjd mtx_unlock(&pr->pr_mtx); 2458124882Srwatson TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2459144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 246087275Srwatson return; 246172786Srwatson } 246287275Srwatson mtx_unlock(&pr->pr_mtx); 246372786Srwatson} 246472786Srwatson 2465185029Spjdvoid 2466185029Spjdprison_free(struct prison *pr) 2467185029Spjd{ 2468185029Spjd 2469185029Spjd mtx_lock(&pr->pr_mtx); 2470185029Spjd prison_free_locked(pr); 2471185029Spjd} 2472185029Spjd 2473124882Srwatsonstatic void 2474124882Srwatsonprison_complete(void *context, int pending) 2475124882Srwatson{ 2476191673Sjamie 2477191673Sjamie prison_deref((struct prison *)context, 0); 2478191673Sjamie} 2479191673Sjamie 2480191673Sjamie/* 2481191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2482191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2483191673Sjamie * references, release and delist the prison. On completion, the prison lock 2484191673Sjamie * and the allprison lock are both unlocked. 2485191673Sjamie */ 2486191673Sjamiestatic void 2487191673Sjamieprison_deref(struct prison *pr, int flags) 2488191673Sjamie{ 2489192895Sjamie struct prison *ppr, *tpr; 2490150652Scsjp int vfslocked; 2491124882Srwatson 2492191673Sjamie if (!(flags & PD_LOCKED)) 2493191673Sjamie mtx_lock(&pr->pr_mtx); 2494225191Sjamie for (;;) { 2495225191Sjamie if (flags & PD_DEUREF) { 2496225191Sjamie pr->pr_uref--; 2497225191Sjamie KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2498192895Sjamie } 2499192895Sjamie if (flags & PD_DEREF) 2500192895Sjamie pr->pr_ref--; 2501192895Sjamie /* If the prison still has references, nothing else to do. */ 2502192895Sjamie if (pr->pr_ref > 0) { 2503192895Sjamie mtx_unlock(&pr->pr_mtx); 2504192895Sjamie if (flags & PD_LIST_SLOCKED) 2505192895Sjamie sx_sunlock(&allprison_lock); 2506192895Sjamie else if (flags & PD_LIST_XLOCKED) 2507192895Sjamie sx_xunlock(&allprison_lock); 2508192895Sjamie return; 2509191673Sjamie } 2510191673Sjamie 2511192895Sjamie mtx_unlock(&pr->pr_mtx); 2512192895Sjamie if (flags & PD_LIST_SLOCKED) { 2513192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2514192895Sjamie sx_sunlock(&allprison_lock); 2515192895Sjamie sx_xlock(&allprison_lock); 2516192895Sjamie } 2517192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2518192895Sjamie sx_xlock(&allprison_lock); 2519168489Spjd 2520192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2521192895Sjamie LIST_REMOVE(pr, pr_sibling); 2522192895Sjamie ppr = pr->pr_parent; 2523192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2524194762Sjamie tpr->pr_childcount--; 2525196592Sjamie sx_xunlock(&allprison_lock); 2526192895Sjamie 2527194251Sjamie#ifdef VIMAGE 2528196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2529194251Sjamie vnet_destroy(pr->pr_vnet); 2530194251Sjamie#endif 2531192895Sjamie if (pr->pr_root != NULL) { 2532192895Sjamie vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2533192895Sjamie vrele(pr->pr_root); 2534192895Sjamie VFS_UNLOCK_GIANT(vfslocked); 2535192895Sjamie } 2536192895Sjamie mtx_destroy(&pr->pr_mtx); 2537191673Sjamie#ifdef INET 2538192895Sjamie free(pr->pr_ip4, M_PRISON); 2539191673Sjamie#endif 2540185435Sbz#ifdef INET6 2541192895Sjamie free(pr->pr_ip6, M_PRISON); 2542185435Sbz#endif 2543192895Sjamie if (pr->pr_cpuset != NULL) 2544192895Sjamie cpuset_rel(pr->pr_cpuset); 2545192895Sjamie osd_jail_exit(pr); 2546221362Strasz#ifdef RACCT 2547221362Strasz prison_racct_detach(pr); 2548220163Strasz#endif 2549192895Sjamie free(pr, M_PRISON); 2550192895Sjamie 2551192895Sjamie /* Removing a prison frees a reference on its parent. */ 2552192895Sjamie pr = ppr; 2553192895Sjamie mtx_lock(&pr->pr_mtx); 2554225191Sjamie flags = PD_DEREF | PD_DEUREF; 2555192895Sjamie } 2556124882Srwatson} 2557124882Srwatson 255872786Srwatsonvoid 2559185029Spjdprison_hold_locked(struct prison *pr) 256072786Srwatson{ 256172786Srwatson 2562185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2563168489Spjd KASSERT(pr->pr_ref > 0, 2564191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 256572786Srwatson pr->pr_ref++; 2566185029Spjd} 2567185029Spjd 2568185029Spjdvoid 2569185029Spjdprison_hold(struct prison *pr) 2570185029Spjd{ 2571185029Spjd 2572185029Spjd mtx_lock(&pr->pr_mtx); 2573185029Spjd prison_hold_locked(pr); 257487275Srwatson mtx_unlock(&pr->pr_mtx); 257572786Srwatson} 257672786Srwatson 2577185435Sbzvoid 2578185435Sbzprison_proc_hold(struct prison *pr) 257987275Srwatson{ 258087275Srwatson 2581185435Sbz mtx_lock(&pr->pr_mtx); 2582191673Sjamie KASSERT(pr->pr_uref > 0, 2583191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2584191673Sjamie pr->pr_uref++; 2585185435Sbz mtx_unlock(&pr->pr_mtx); 258687275Srwatson} 258787275Srwatson 2588185435Sbzvoid 2589185435Sbzprison_proc_free(struct prison *pr) 2590185435Sbz{ 2591185435Sbz 2592185435Sbz mtx_lock(&pr->pr_mtx); 2593191673Sjamie KASSERT(pr->pr_uref > 0, 2594191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2595191673Sjamie prison_deref(pr, PD_DEUREF | PD_LOCKED); 2596185435Sbz} 2597185435Sbz 2598185435Sbz 2599185435Sbz#ifdef INET 2600185435Sbz/* 2601192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2602192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2603192895Sjamie */ 2604192895Sjamiestatic int 2605192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2606192895Sjamie{ 2607192895Sjamie int ii, ij, used; 2608192895Sjamie struct prison *ppr; 2609192895Sjamie 2610192895Sjamie ppr = pr->pr_parent; 2611192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2612192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2613192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2614192895Sjamie /* 2615192895Sjamie * There's no room for the parent's list. Use the 2616192895Sjamie * new list buffer, which is assumed to be big enough 2617192895Sjamie * (if it was passed). If there's no buffer, try to 2618192895Sjamie * allocate one. 2619192895Sjamie */ 2620192895Sjamie used = 1; 2621192895Sjamie if (newip4 == NULL) { 2622192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2623192895Sjamie M_PRISON, M_NOWAIT); 2624192895Sjamie if (newip4 != NULL) 2625192895Sjamie used = 0; 2626192895Sjamie } 2627192895Sjamie if (newip4 != NULL) { 2628192895Sjamie bcopy(ppr->pr_ip4, newip4, 2629192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2630192895Sjamie free(pr->pr_ip4, M_PRISON); 2631192895Sjamie pr->pr_ip4 = newip4; 2632192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2633192895Sjamie } 2634192895Sjamie return (used); 2635192895Sjamie } 2636192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2637192895Sjamie if (pr->pr_ip4s > 0) 2638192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2639192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2640192895Sjamie else if (pr->pr_ip4 != NULL) { 2641192895Sjamie free(pr->pr_ip4, M_PRISON); 2642192895Sjamie pr->pr_ip4 = NULL; 2643192895Sjamie } 2644195974Sjamie } else if (pr->pr_ip4s > 0) { 2645192895Sjamie /* Remove addresses that aren't in the parent. */ 2646192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2647192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2648192895Sjamie break; 2649192895Sjamie if (ij < ppr->pr_ip4s) 2650192895Sjamie ii = 1; 2651192895Sjamie else { 2652192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2653192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2654192895Sjamie ii = 0; 2655192895Sjamie } 2656192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2657192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2658192895Sjamie ii++; 2659192895Sjamie continue; 2660192895Sjamie } 2661192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2662192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2663192895Sjamie case -1: 2664192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2665192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2666192895Sjamie break; 2667192895Sjamie case 0: 2668192895Sjamie ii++; 2669192895Sjamie ij++; 2670192895Sjamie break; 2671192895Sjamie case 1: 2672192895Sjamie ij++; 2673192895Sjamie break; 2674192895Sjamie } 2675192895Sjamie } 2676192895Sjamie if (pr->pr_ip4s == 0) { 2677195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2678192895Sjamie free(pr->pr_ip4, M_PRISON); 2679192895Sjamie pr->pr_ip4 = NULL; 2680192895Sjamie } 2681192895Sjamie } 2682192895Sjamie return (0); 2683192895Sjamie} 2684192895Sjamie 2685192895Sjamie/* 2686185435Sbz * Pass back primary IPv4 address of this jail. 2687185435Sbz * 2688192895Sjamie * If not restricted return success but do not alter the address. Caller has 2689192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2690185435Sbz * 2691188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2692188144Sjamie * Address returned in NBO. 2693185435Sbz */ 269446155Sphkint 2695187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 269646155Sphk{ 2697191673Sjamie struct prison *pr; 269846155Sphk 2699185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2700185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2701185435Sbz 2702192895Sjamie pr = cred->cr_prison; 2703192895Sjamie if (!(pr->pr_flags & PR_IP4)) 270446155Sphk return (0); 2705191673Sjamie mtx_lock(&pr->pr_mtx); 2706192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2707192895Sjamie mtx_unlock(&pr->pr_mtx); 2708192895Sjamie return (0); 2709192895Sjamie } 2710191673Sjamie if (pr->pr_ip4 == NULL) { 2711191673Sjamie mtx_unlock(&pr->pr_mtx); 2712188144Sjamie return (EAFNOSUPPORT); 2713191673Sjamie } 2714185435Sbz 2715191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2716191673Sjamie mtx_unlock(&pr->pr_mtx); 2717185435Sbz return (0); 2718185435Sbz} 2719185435Sbz 2720185435Sbz/* 2721202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2722202468Sbz * We will return 0 if we should bypass source address selection in favour 2723202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2724202468Sbz * returned in NBO. 2725202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2726202468Sbz */ 2727202468Sbzint 2728202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2729202468Sbz{ 2730202468Sbz struct prison *pr; 2731202468Sbz struct in_addr lia; 2732202468Sbz int error; 2733202468Sbz 2734202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2735202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2736202468Sbz 2737202468Sbz if (!jailed(cred)) 2738202468Sbz return (1); 2739202468Sbz 2740202468Sbz pr = cred->cr_prison; 2741202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2742202468Sbz return (1); 2743202468Sbz 2744202468Sbz lia.s_addr = INADDR_ANY; 2745202468Sbz error = prison_get_ip4(cred, &lia); 2746202468Sbz if (error) 2747202468Sbz return (error); 2748202468Sbz if (lia.s_addr == INADDR_ANY) 2749202468Sbz return (1); 2750202468Sbz 2751202468Sbz ia->s_addr = lia.s_addr; 2752202468Sbz return (0); 2753202468Sbz} 2754202468Sbz 2755202468Sbz/* 2756192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2757192895Sjamie */ 2758192895Sjamieint 2759192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2760192895Sjamie{ 2761192895Sjamie 2762192895Sjamie if (pr1 == pr2) 2763192895Sjamie return (1); 2764192895Sjamie 2765192895Sjamie /* 2766195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2767195974Sjamie * existing prisons. 2768192895Sjamie */ 2769195945Sjamie while (pr1 != &prison0 && 2770195945Sjamie#ifdef VIMAGE 2771195945Sjamie !(pr1->pr_flags & PR_VNET) && 2772195945Sjamie#endif 2773195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2774192895Sjamie pr1 = pr1->pr_parent; 2775195945Sjamie while (pr2 != &prison0 && 2776195945Sjamie#ifdef VIMAGE 2777195945Sjamie !(pr2->pr_flags & PR_VNET) && 2778195945Sjamie#endif 2779195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2780192895Sjamie pr2 = pr2->pr_parent; 2781192895Sjamie return (pr1 == pr2); 2782192895Sjamie} 2783192895Sjamie 2784192895Sjamie/* 2785185435Sbz * Make sure our (source) address is set to something meaningful to this 2786185435Sbz * jail. 2787185435Sbz * 2788192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2789192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2790192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2791185435Sbz */ 2792185435Sbzint 2793185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2794185435Sbz{ 2795191673Sjamie struct prison *pr; 2796185435Sbz struct in_addr ia0; 2797191673Sjamie int error; 2798185435Sbz 2799185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2800185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2801185435Sbz 2802192895Sjamie pr = cred->cr_prison; 2803192895Sjamie if (!(pr->pr_flags & PR_IP4)) 280446155Sphk return (0); 2805191673Sjamie mtx_lock(&pr->pr_mtx); 2806192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2807192895Sjamie mtx_unlock(&pr->pr_mtx); 2808192895Sjamie return (0); 2809192895Sjamie } 2810191673Sjamie if (pr->pr_ip4 == NULL) { 2811191673Sjamie mtx_unlock(&pr->pr_mtx); 2812188144Sjamie return (EAFNOSUPPORT); 2813191673Sjamie } 2814185435Sbz 2815185435Sbz ia0.s_addr = ntohl(ia->s_addr); 2816185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 2817191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2818191673Sjamie mtx_unlock(&pr->pr_mtx); 2819185435Sbz return (0); 282046155Sphk } 2821185435Sbz 2822188144Sjamie if (ia0.s_addr == INADDR_ANY) { 2823188144Sjamie /* 2824188144Sjamie * In case there is only 1 IPv4 address, bind directly. 2825188144Sjamie */ 2826191673Sjamie if (pr->pr_ip4s == 1) 2827191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2828191673Sjamie mtx_unlock(&pr->pr_mtx); 2829185435Sbz return (0); 2830185435Sbz } 2831185435Sbz 2832191673Sjamie error = _prison_check_ip4(pr, ia); 2833191673Sjamie mtx_unlock(&pr->pr_mtx); 2834191673Sjamie return (error); 2835185435Sbz} 2836185435Sbz 2837185435Sbz/* 2838185435Sbz * Rewrite destination address in case we will connect to loopback address. 2839185435Sbz * 2840188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2841188144Sjamie * Address passed in in NBO and returned in NBO. 2842185435Sbz */ 2843185435Sbzint 2844185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2845185435Sbz{ 2846191673Sjamie struct prison *pr; 2847185435Sbz 2848185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2849185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2850185435Sbz 2851192895Sjamie pr = cred->cr_prison; 2852192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2853185435Sbz return (0); 2854191673Sjamie mtx_lock(&pr->pr_mtx); 2855192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2856192895Sjamie mtx_unlock(&pr->pr_mtx); 2857192895Sjamie return (0); 2858192895Sjamie } 2859191673Sjamie if (pr->pr_ip4 == NULL) { 2860191673Sjamie mtx_unlock(&pr->pr_mtx); 2861188144Sjamie return (EAFNOSUPPORT); 2862191673Sjamie } 2863188144Sjamie 2864185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2865191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2866191673Sjamie mtx_unlock(&pr->pr_mtx); 2867185435Sbz return (0); 2868185435Sbz } 2869185435Sbz 2870185435Sbz /* 2871185435Sbz * Return success because nothing had to be changed. 2872185435Sbz */ 2873191673Sjamie mtx_unlock(&pr->pr_mtx); 2874185435Sbz return (0); 2875185435Sbz} 2876185435Sbz 2877185435Sbz/* 2878188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 2879185435Sbz * 2880192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2881192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2882192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 2883185435Sbz */ 2884185435Sbzstatic int 2885185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 2886185435Sbz{ 2887185435Sbz int i, a, z, d; 2888185435Sbz 2889185435Sbz /* 2890185435Sbz * Check the primary IP. 2891185435Sbz */ 2892185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 2893188144Sjamie return (0); 2894185435Sbz 2895185435Sbz /* 2896185435Sbz * All the other IPs are sorted so we can do a binary search. 2897185435Sbz */ 2898185435Sbz a = 0; 2899185435Sbz z = pr->pr_ip4s - 2; 2900185435Sbz while (a <= z) { 2901185435Sbz i = (a + z) / 2; 2902185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2903185435Sbz if (d > 0) 2904185435Sbz z = i - 1; 2905185435Sbz else if (d < 0) 2906185435Sbz a = i + 1; 290781114Srwatson else 2908188144Sjamie return (0); 2909185435Sbz } 2910188144Sjamie 2911188144Sjamie return (EADDRNOTAVAIL); 2912185435Sbz} 2913185435Sbz 2914185435Sbzint 2915185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 2916185435Sbz{ 2917191673Sjamie struct prison *pr; 2918191673Sjamie int error; 2919185435Sbz 2920185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2921185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2922185435Sbz 2923192895Sjamie pr = cred->cr_prison; 2924192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2925188144Sjamie return (0); 2926191673Sjamie mtx_lock(&pr->pr_mtx); 2927192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2928192895Sjamie mtx_unlock(&pr->pr_mtx); 2929192895Sjamie return (0); 2930192895Sjamie } 2931191673Sjamie if (pr->pr_ip4 == NULL) { 2932191673Sjamie mtx_unlock(&pr->pr_mtx); 2933188144Sjamie return (EAFNOSUPPORT); 2934191673Sjamie } 2935185435Sbz 2936191673Sjamie error = _prison_check_ip4(pr, ia); 2937191673Sjamie mtx_unlock(&pr->pr_mtx); 2938191673Sjamie return (error); 2939185435Sbz} 2940185435Sbz#endif 2941185435Sbz 2942185435Sbz#ifdef INET6 2943192895Sjamiestatic int 2944192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2945192895Sjamie{ 2946192895Sjamie int ii, ij, used; 2947192895Sjamie struct prison *ppr; 2948192895Sjamie 2949192895Sjamie ppr = pr->pr_parent; 2950192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 2951192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2952192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 2953192895Sjamie /* 2954192895Sjamie * There's no room for the parent's list. Use the 2955192895Sjamie * new list buffer, which is assumed to be big enough 2956192895Sjamie * (if it was passed). If there's no buffer, try to 2957192895Sjamie * allocate one. 2958192895Sjamie */ 2959192895Sjamie used = 1; 2960192895Sjamie if (newip6 == NULL) { 2961192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 2962192895Sjamie M_PRISON, M_NOWAIT); 2963192895Sjamie if (newip6 != NULL) 2964192895Sjamie used = 0; 2965192895Sjamie } 2966192895Sjamie if (newip6 != NULL) { 2967192895Sjamie bcopy(ppr->pr_ip6, newip6, 2968192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 2969192895Sjamie free(pr->pr_ip6, M_PRISON); 2970192895Sjamie pr->pr_ip6 = newip6; 2971192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2972192895Sjamie } 2973192895Sjamie return (used); 2974192895Sjamie } 2975192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2976192895Sjamie if (pr->pr_ip6s > 0) 2977192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 2978192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 2979192895Sjamie else if (pr->pr_ip6 != NULL) { 2980192895Sjamie free(pr->pr_ip6, M_PRISON); 2981192895Sjamie pr->pr_ip6 = NULL; 2982192895Sjamie } 2983195974Sjamie } else if (pr->pr_ip6s > 0) { 2984192895Sjamie /* Remove addresses that aren't in the parent. */ 2985192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 2986192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 2987192895Sjamie &ppr->pr_ip6[ij])) 2988192895Sjamie break; 2989192895Sjamie if (ij < ppr->pr_ip6s) 2990192895Sjamie ii = 1; 2991192895Sjamie else { 2992192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 2993192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2994192895Sjamie ii = 0; 2995192895Sjamie } 2996192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 2997192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 2998192895Sjamie &ppr->pr_ip6[0])) { 2999192895Sjamie ii++; 3000192895Sjamie continue; 3001192895Sjamie } 3002192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 3003192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3004192895Sjamie case -1: 3005192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3006192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3007192895Sjamie break; 3008192895Sjamie case 0: 3009192895Sjamie ii++; 3010192895Sjamie ij++; 3011192895Sjamie break; 3012192895Sjamie case 1: 3013192895Sjamie ij++; 3014192895Sjamie break; 3015192895Sjamie } 3016192895Sjamie } 3017192895Sjamie if (pr->pr_ip6s == 0) { 3018195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 3019192895Sjamie free(pr->pr_ip6, M_PRISON); 3020192895Sjamie pr->pr_ip6 = NULL; 3021192895Sjamie } 3022192895Sjamie } 3023192895Sjamie return 0; 3024192895Sjamie} 3025192895Sjamie 3026185435Sbz/* 3027185435Sbz * Pass back primary IPv6 address for this jail. 3028185435Sbz * 3029192895Sjamie * If not restricted return success but do not alter the address. Caller has 3030192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3031185435Sbz * 3032188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3033185435Sbz */ 3034185435Sbzint 3035187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3036185435Sbz{ 3037191673Sjamie struct prison *pr; 3038185435Sbz 3039185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3040185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3041185435Sbz 3042192895Sjamie pr = cred->cr_prison; 3043192895Sjamie if (!(pr->pr_flags & PR_IP6)) 304481114Srwatson return (0); 3045191673Sjamie mtx_lock(&pr->pr_mtx); 3046192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3047192895Sjamie mtx_unlock(&pr->pr_mtx); 3048192895Sjamie return (0); 3049192895Sjamie } 3050191673Sjamie if (pr->pr_ip6 == NULL) { 3051191673Sjamie mtx_unlock(&pr->pr_mtx); 3052188144Sjamie return (EAFNOSUPPORT); 3053191673Sjamie } 3054188144Sjamie 3055191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3056191673Sjamie mtx_unlock(&pr->pr_mtx); 3057185435Sbz return (0); 3058185435Sbz} 3059185435Sbz 3060185435Sbz/* 3061202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3062202468Sbz * We will return 0 if we should bypass source address selection in favour 3063202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3064202468Sbz * returned in NBO. 3065202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3066202468Sbz */ 3067202468Sbzint 3068202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3069202468Sbz{ 3070202468Sbz struct prison *pr; 3071202468Sbz struct in6_addr lia6; 3072202468Sbz int error; 3073202468Sbz 3074202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3075202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3076202468Sbz 3077202468Sbz if (!jailed(cred)) 3078202468Sbz return (1); 3079202468Sbz 3080202468Sbz pr = cred->cr_prison; 3081202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3082202468Sbz return (1); 3083202468Sbz 3084202468Sbz lia6 = in6addr_any; 3085202468Sbz error = prison_get_ip6(cred, &lia6); 3086202468Sbz if (error) 3087202468Sbz return (error); 3088202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3089202468Sbz return (1); 3090202468Sbz 3091202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3092202468Sbz return (0); 3093202468Sbz} 3094202468Sbz 3095202468Sbz/* 3096192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3097192895Sjamie */ 3098192895Sjamieint 3099192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3100192895Sjamie{ 3101192895Sjamie 3102192895Sjamie if (pr1 == pr2) 3103192895Sjamie return (1); 3104192895Sjamie 3105195945Sjamie while (pr1 != &prison0 && 3106195945Sjamie#ifdef VIMAGE 3107195945Sjamie !(pr1->pr_flags & PR_VNET) && 3108195945Sjamie#endif 3109195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3110192895Sjamie pr1 = pr1->pr_parent; 3111195945Sjamie while (pr2 != &prison0 && 3112195945Sjamie#ifdef VIMAGE 3113195945Sjamie !(pr2->pr_flags & PR_VNET) && 3114195945Sjamie#endif 3115195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3116192895Sjamie pr2 = pr2->pr_parent; 3117192895Sjamie return (pr1 == pr2); 3118192895Sjamie} 3119192895Sjamie 3120192895Sjamie/* 3121185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3122185435Sbz * 3123185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3124185435Sbz * when needed while binding. 3125185435Sbz * 3126192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3127192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3128192895Sjamie * doesn't allow IPv6. 3129185435Sbz */ 3130185435Sbzint 3131185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3132185435Sbz{ 3133191673Sjamie struct prison *pr; 3134191673Sjamie int error; 3135185435Sbz 3136185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3137185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3138185435Sbz 3139192895Sjamie pr = cred->cr_prison; 3140192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3141185435Sbz return (0); 3142191673Sjamie mtx_lock(&pr->pr_mtx); 3143192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3144192895Sjamie mtx_unlock(&pr->pr_mtx); 3145192895Sjamie return (0); 3146192895Sjamie } 3147191673Sjamie if (pr->pr_ip6 == NULL) { 3148191673Sjamie mtx_unlock(&pr->pr_mtx); 3149188144Sjamie return (EAFNOSUPPORT); 3150191673Sjamie } 3151188144Sjamie 3152185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3153191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3154191673Sjamie mtx_unlock(&pr->pr_mtx); 3155185435Sbz return (0); 315681114Srwatson } 3157185435Sbz 3158188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3159188144Sjamie /* 3160188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3161188144Sjamie * then bind directly. 3162188144Sjamie */ 3163191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3164191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3165191673Sjamie mtx_unlock(&pr->pr_mtx); 3166185435Sbz return (0); 3167185435Sbz } 3168188144Sjamie 3169191673Sjamie error = _prison_check_ip6(pr, ia6); 3170191673Sjamie mtx_unlock(&pr->pr_mtx); 3171191673Sjamie return (error); 3172185435Sbz} 3173185435Sbz 3174185435Sbz/* 3175185435Sbz * Rewrite destination address in case we will connect to loopback address. 3176185435Sbz * 3177188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3178185435Sbz */ 3179185435Sbzint 3180185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3181185435Sbz{ 3182191673Sjamie struct prison *pr; 3183185435Sbz 3184185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3185185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3186185435Sbz 3187192895Sjamie pr = cred->cr_prison; 3188192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3189185435Sbz return (0); 3190191673Sjamie mtx_lock(&pr->pr_mtx); 3191192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3192192895Sjamie mtx_unlock(&pr->pr_mtx); 3193192895Sjamie return (0); 3194192895Sjamie } 3195191673Sjamie if (pr->pr_ip6 == NULL) { 3196191673Sjamie mtx_unlock(&pr->pr_mtx); 3197188144Sjamie return (EAFNOSUPPORT); 3198191673Sjamie } 3199188144Sjamie 3200185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3201191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3202191673Sjamie mtx_unlock(&pr->pr_mtx); 3203185435Sbz return (0); 3204185435Sbz } 3205185435Sbz 3206185435Sbz /* 3207185435Sbz * Return success because nothing had to be changed. 3208185435Sbz */ 3209191673Sjamie mtx_unlock(&pr->pr_mtx); 321046155Sphk return (0); 321146155Sphk} 321246155Sphk 3213185435Sbz/* 3214188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3215185435Sbz * 3216192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3217192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3218192895Sjamie * doesn't allow IPv6. 3219185435Sbz */ 3220185435Sbzstatic int 3221185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 322246155Sphk{ 3223185435Sbz int i, a, z, d; 322446155Sphk 3225185435Sbz /* 3226185435Sbz * Check the primary IP. 3227185435Sbz */ 3228185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3229188144Sjamie return (0); 3230185435Sbz 3231185435Sbz /* 3232185435Sbz * All the other IPs are sorted so we can do a binary search. 3233185435Sbz */ 3234185435Sbz a = 0; 3235185435Sbz z = pr->pr_ip6s - 2; 3236185435Sbz while (a <= z) { 3237185435Sbz i = (a + z) / 2; 3238185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3239185435Sbz if (d > 0) 3240185435Sbz z = i - 1; 3241185435Sbz else if (d < 0) 3242185435Sbz a = i + 1; 324346155Sphk else 3244188144Sjamie return (0); 324546155Sphk } 3246188144Sjamie 3247188144Sjamie return (EADDRNOTAVAIL); 324846155Sphk} 324946155Sphk 325046155Sphkint 3251185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3252185435Sbz{ 3253191673Sjamie struct prison *pr; 3254191673Sjamie int error; 3255185435Sbz 3256185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3257185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3258185435Sbz 3259192895Sjamie pr = cred->cr_prison; 3260192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3261188144Sjamie return (0); 3262191673Sjamie mtx_lock(&pr->pr_mtx); 3263192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3264192895Sjamie mtx_unlock(&pr->pr_mtx); 3265192895Sjamie return (0); 3266192895Sjamie } 3267191673Sjamie if (pr->pr_ip6 == NULL) { 3268191673Sjamie mtx_unlock(&pr->pr_mtx); 3269188144Sjamie return (EAFNOSUPPORT); 3270191673Sjamie } 3271185435Sbz 3272191673Sjamie error = _prison_check_ip6(pr, ia6); 3273191673Sjamie mtx_unlock(&pr->pr_mtx); 3274191673Sjamie return (error); 3275185435Sbz} 3276185435Sbz#endif 3277185435Sbz 3278185435Sbz/* 3279188146Sjamie * Check if a jail supports the given address family. 3280188146Sjamie * 3281188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3282188146Sjamie * if not. 3283188146Sjamie */ 3284188146Sjamieint 3285188146Sjamieprison_check_af(struct ucred *cred, int af) 3286188146Sjamie{ 3287192895Sjamie struct prison *pr; 3288188146Sjamie int error; 3289188146Sjamie 3290188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3291188146Sjamie 3292192895Sjamie pr = cred->cr_prison; 3293194923Sjamie#ifdef VIMAGE 3294194915Sjamie /* Prisons with their own network stack are not limited. */ 3295200473Sbz if (prison_owns_vnet(cred)) 3296194915Sjamie return (0); 3297194923Sjamie#endif 3298194915Sjamie 3299188146Sjamie error = 0; 3300188146Sjamie switch (af) 3301188146Sjamie { 3302188146Sjamie#ifdef INET 3303188146Sjamie case AF_INET: 3304192895Sjamie if (pr->pr_flags & PR_IP4) 3305192895Sjamie { 3306192895Sjamie mtx_lock(&pr->pr_mtx); 3307192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3308192895Sjamie error = EAFNOSUPPORT; 3309192895Sjamie mtx_unlock(&pr->pr_mtx); 3310192895Sjamie } 3311188146Sjamie break; 3312188146Sjamie#endif 3313188146Sjamie#ifdef INET6 3314188146Sjamie case AF_INET6: 3315192895Sjamie if (pr->pr_flags & PR_IP6) 3316192895Sjamie { 3317192895Sjamie mtx_lock(&pr->pr_mtx); 3318192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3319192895Sjamie error = EAFNOSUPPORT; 3320192895Sjamie mtx_unlock(&pr->pr_mtx); 3321192895Sjamie } 3322188146Sjamie break; 3323188146Sjamie#endif 3324188146Sjamie case AF_LOCAL: 3325188146Sjamie case AF_ROUTE: 3326188146Sjamie break; 3327188146Sjamie default: 3328192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3329188146Sjamie error = EAFNOSUPPORT; 3330188146Sjamie } 3331188146Sjamie return (error); 3332188146Sjamie} 3333188146Sjamie 3334188146Sjamie/* 3335185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3336185435Sbz * prison_check_ip[46]). 3337185435Sbz * 3338192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3339192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3340192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3341185435Sbz */ 3342185435Sbzint 334372786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 334446155Sphk{ 3345185435Sbz#ifdef INET 3346114168Smike struct sockaddr_in *sai; 3347185435Sbz#endif 3348185435Sbz#ifdef INET6 3349185435Sbz struct sockaddr_in6 *sai6; 3350185435Sbz#endif 3351188144Sjamie int error; 335246155Sphk 3353185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3354185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3355185435Sbz 3356200473Sbz#ifdef VIMAGE 3357200473Sbz if (prison_owns_vnet(cred)) 3358200473Sbz return (0); 3359200473Sbz#endif 3360200473Sbz 3361188144Sjamie error = 0; 3362188144Sjamie switch (sa->sa_family) 3363185435Sbz { 3364185435Sbz#ifdef INET 3365185435Sbz case AF_INET: 3366185435Sbz sai = (struct sockaddr_in *)sa; 3367188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3368185435Sbz break; 3369185435Sbz#endif 3370185435Sbz#ifdef INET6 3371185435Sbz case AF_INET6: 3372185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3373188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3374185435Sbz break; 3375185435Sbz#endif 3376185435Sbz default: 3377192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3378188144Sjamie error = EAFNOSUPPORT; 3379185435Sbz } 3380188144Sjamie return (error); 338146155Sphk} 338272786Srwatson 338372786Srwatson/* 338472786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 338572786Srwatson */ 338672786Srwatsonint 3387114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 338872786Srwatson{ 338972786Srwatson 3390192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3391192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3392192895Sjamie} 339372786Srwatson 3394192895Sjamie/* 3395192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3396192895Sjamie */ 3397192895Sjamieint 3398192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3399192895Sjamie{ 3400192895Sjamie 3401192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3402192895Sjamie if (pr1 == pr2) 3403192895Sjamie return (1); 340472786Srwatson return (0); 340572786Srwatson} 340672786Srwatson 340772786Srwatson/* 340872786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 340972786Srwatson */ 341072786Srwatsonint 3411114168Smikejailed(struct ucred *cred) 341272786Srwatson{ 341372786Srwatson 3414192895Sjamie return (cred->cr_prison != &prison0); 341572786Srwatson} 341691384Srobert 341791384Srobert/* 3418200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3419200473Sbz * have its own virtual network stack, otherwise 0. 3420200473Sbz */ 3421200473Sbzint 3422200473Sbzjailed_without_vnet(struct ucred *cred) 3423200473Sbz{ 3424200473Sbz 3425200473Sbz if (!jailed(cred)) 3426200473Sbz return (0); 3427200473Sbz#ifdef VIMAGE 3428200473Sbz if (prison_owns_vnet(cred)) 3429200473Sbz return (0); 3430200473Sbz#endif 3431200473Sbz 3432200473Sbz return (1); 3433200473Sbz} 3434200473Sbz 3435200473Sbz/* 3436194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 343791384Srobert */ 343891391Srobertvoid 3439114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 344091384Srobert{ 3441193066Sjamie struct prison *pr; 344291384Srobert 3443194090Sjamie /* 3444194090Sjamie * A NULL credential can be used to shortcut to the physical 3445194090Sjamie * system's hostname. 3446194090Sjamie */ 3447193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3448193066Sjamie mtx_lock(&pr->pr_mtx); 3449194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3450193066Sjamie mtx_unlock(&pr->pr_mtx); 345191384Srobert} 3452113275Smike 3453194090Sjamievoid 3454194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3455194090Sjamie{ 3456194090Sjamie 3457194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3458194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3459194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3460194090Sjamie} 3461194090Sjamie 3462194090Sjamievoid 3463194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3464194090Sjamie{ 3465194090Sjamie 3466194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3467194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3468194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3469194090Sjamie} 3470194090Sjamie 3471194090Sjamievoid 3472194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3473194090Sjamie{ 3474194090Sjamie 3475194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3476194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3477194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3478194090Sjamie} 3479194090Sjamie 3480196176Sbz#ifdef VIMAGE 3481125804Srwatson/* 3482196176Sbz * Determine whether the prison represented by cred owns 3483196176Sbz * its vnet rather than having it inherited. 3484196176Sbz * 3485196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3486196176Sbz */ 3487196176Sbzint 3488196176Sbzprison_owns_vnet(struct ucred *cred) 3489196176Sbz{ 3490196176Sbz 3491196176Sbz /* 3492196176Sbz * vnets cannot be added/removed after jail creation, 3493196176Sbz * so no need to lock here. 3494196176Sbz */ 3495196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3496196176Sbz} 3497196176Sbz#endif 3498196176Sbz 3499196176Sbz/* 3500147185Spjd * Determine whether the subject represented by cred can "see" 3501147185Spjd * status of a mount point. 3502147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3503147185Spjd * XXX: This function should be called cr_canseemount() and should be 3504147185Spjd * placed in kern_prot.c. 3505125804Srwatson */ 3506125804Srwatsonint 3507147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3508125804Srwatson{ 3509147185Spjd struct prison *pr; 3510147185Spjd struct statfs *sp; 3511147185Spjd size_t len; 3512125804Srwatson 3513192895Sjamie pr = cred->cr_prison; 3514192895Sjamie if (pr->pr_enforce_statfs == 0) 3515147185Spjd return (0); 3516147185Spjd if (pr->pr_root->v_mount == mp) 3517147185Spjd return (0); 3518192895Sjamie if (pr->pr_enforce_statfs == 2) 3519147185Spjd return (ENOENT); 3520147185Spjd /* 3521147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3522147185Spjd * all mount-points from inside a jail. 3523147185Spjd * This is ugly check, but this is the only situation when jail's 3524147185Spjd * directory ends with '/'. 3525147185Spjd */ 3526147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3527147185Spjd return (0); 3528147185Spjd len = strlen(pr->pr_path); 3529147185Spjd sp = &mp->mnt_stat; 3530147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3531147185Spjd return (ENOENT); 3532147185Spjd /* 3533147185Spjd * Be sure that we don't have situation where jail's root directory 3534147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3535147185Spjd */ 3536147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3537147185Spjd return (ENOENT); 3538147185Spjd return (0); 3539147185Spjd} 3540147185Spjd 3541147185Spjdvoid 3542147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3543147185Spjd{ 3544147185Spjd char jpath[MAXPATHLEN]; 3545147185Spjd struct prison *pr; 3546147185Spjd size_t len; 3547147185Spjd 3548192895Sjamie pr = cred->cr_prison; 3549192895Sjamie if (pr->pr_enforce_statfs == 0) 3550147185Spjd return; 3551147185Spjd if (prison_canseemount(cred, mp) != 0) { 3552147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3553147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3554147185Spjd sizeof(sp->f_mntonname)); 3555147185Spjd return; 3556125804Srwatson } 3557147185Spjd if (pr->pr_root->v_mount == mp) { 3558147185Spjd /* 3559147185Spjd * Clear current buffer data, so we are sure nothing from 3560147185Spjd * the valid path left there. 3561147185Spjd */ 3562147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3563147185Spjd *sp->f_mntonname = '/'; 3564147185Spjd return; 3565147185Spjd } 3566147185Spjd /* 3567147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3568147185Spjd * all mount-points from inside a jail. 3569147185Spjd */ 3570147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3571147185Spjd return; 3572147185Spjd len = strlen(pr->pr_path); 3573147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3574147185Spjd /* 3575147185Spjd * Clear current buffer data, so we are sure nothing from 3576147185Spjd * the valid path left there. 3577147185Spjd */ 3578147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3579147185Spjd if (*jpath == '\0') { 3580147185Spjd /* Should never happen. */ 3581147185Spjd *sp->f_mntonname = '/'; 3582147185Spjd } else { 3583147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3584147185Spjd } 3585125804Srwatson} 3586125804Srwatson 3587164032Srwatson/* 3588164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3589164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3590164032Srwatson */ 3591164032Srwatsonint 3592164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3593164032Srwatson{ 3594164032Srwatson 3595164032Srwatson if (!jailed(cred)) 3596164032Srwatson return (0); 3597164032Srwatson 3598194915Sjamie#ifdef VIMAGE 3599194915Sjamie /* 3600194915Sjamie * Privileges specific to prisons with a virtual network stack. 3601194915Sjamie * There might be a duplicate entry here in case the privilege 3602194915Sjamie * is only granted conditionally in the legacy jail case. 3603194915Sjamie */ 3604164032Srwatson switch (priv) { 3605194915Sjamie#ifdef notyet 3606194915Sjamie /* 3607194915Sjamie * NFS-specific privileges. 3608194915Sjamie */ 3609194915Sjamie case PRIV_NFS_DAEMON: 3610194915Sjamie case PRIV_NFS_LOCKD: 3611194915Sjamie#endif 3612194915Sjamie /* 3613194915Sjamie * Network stack privileges. 3614194915Sjamie */ 3615194915Sjamie case PRIV_NET_BRIDGE: 3616194915Sjamie case PRIV_NET_GRE: 3617194915Sjamie case PRIV_NET_BPF: 3618194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3619194915Sjamie case PRIV_NET_ROUTE: 3620194915Sjamie case PRIV_NET_TAP: 3621194915Sjamie case PRIV_NET_SETIFMTU: 3622194915Sjamie case PRIV_NET_SETIFFLAGS: 3623194915Sjamie case PRIV_NET_SETIFCAP: 3624203052Sdelphij case PRIV_NET_SETIFDESCR: 3625194915Sjamie case PRIV_NET_SETIFNAME : 3626194915Sjamie case PRIV_NET_SETIFMETRIC: 3627194915Sjamie case PRIV_NET_SETIFPHYS: 3628194915Sjamie case PRIV_NET_SETIFMAC: 3629194915Sjamie case PRIV_NET_ADDMULTI: 3630194915Sjamie case PRIV_NET_DELMULTI: 3631194915Sjamie case PRIV_NET_HWIOCTL: 3632194915Sjamie case PRIV_NET_SETLLADDR: 3633194915Sjamie case PRIV_NET_ADDIFGROUP: 3634194915Sjamie case PRIV_NET_DELIFGROUP: 3635194915Sjamie case PRIV_NET_IFCREATE: 3636194915Sjamie case PRIV_NET_IFDESTROY: 3637194915Sjamie case PRIV_NET_ADDIFADDR: 3638194915Sjamie case PRIV_NET_DELIFADDR: 3639194915Sjamie case PRIV_NET_LAGG: 3640194915Sjamie case PRIV_NET_GIF: 3641194915Sjamie case PRIV_NET_SETIFVNET: 3642223735Sbz case PRIV_NET_SETIFFIB: 3643164032Srwatson 3644164032Srwatson /* 3645194915Sjamie * 802.11-related privileges. 3646194915Sjamie */ 3647194915Sjamie case PRIV_NET80211_GETKEY: 3648194915Sjamie#ifdef notyet 3649194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3650194915Sjamie#endif 3651194915Sjamie 3652194915Sjamie#ifdef notyet 3653194915Sjamie /* 3654194915Sjamie * AppleTalk privileges. 3655194915Sjamie */ 3656194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3657194915Sjamie 3658194915Sjamie /* 3659194915Sjamie * ATM privileges. 3660194915Sjamie */ 3661194915Sjamie case PRIV_NETATM_CFG: 3662194915Sjamie case PRIV_NETATM_ADD: 3663194915Sjamie case PRIV_NETATM_DEL: 3664194915Sjamie case PRIV_NETATM_SET: 3665194915Sjamie 3666194915Sjamie /* 3667194915Sjamie * Bluetooth privileges. 3668194915Sjamie */ 3669194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3670194915Sjamie#endif 3671194915Sjamie 3672194915Sjamie /* 3673194915Sjamie * Netgraph and netgraph module privileges. 3674194915Sjamie */ 3675194915Sjamie case PRIV_NETGRAPH_CONTROL: 3676194915Sjamie#ifdef notyet 3677194915Sjamie case PRIV_NETGRAPH_TTY: 3678194915Sjamie#endif 3679194915Sjamie 3680194915Sjamie /* 3681194915Sjamie * IPv4 and IPv6 privileges. 3682194915Sjamie */ 3683194915Sjamie case PRIV_NETINET_IPFW: 3684194915Sjamie case PRIV_NETINET_DIVERT: 3685194915Sjamie case PRIV_NETINET_PF: 3686194915Sjamie case PRIV_NETINET_DUMMYNET: 3687194915Sjamie case PRIV_NETINET_CARP: 3688194915Sjamie case PRIV_NETINET_MROUTE: 3689194915Sjamie case PRIV_NETINET_RAW: 3690194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3691194915Sjamie case PRIV_NETINET_ND6: 3692194915Sjamie case PRIV_NETINET_SCOPE6: 3693194915Sjamie case PRIV_NETINET_ALIFETIME6: 3694194915Sjamie case PRIV_NETINET_IPSEC: 3695194915Sjamie case PRIV_NETINET_BINDANY: 3696194915Sjamie 3697194915Sjamie#ifdef notyet 3698194915Sjamie /* 3699194915Sjamie * IPX/SPX privileges. 3700194915Sjamie */ 3701194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3702194915Sjamie case PRIV_NETIPX_RAW: 3703194915Sjamie 3704194915Sjamie /* 3705194915Sjamie * NCP privileges. 3706194915Sjamie */ 3707194915Sjamie case PRIV_NETNCP: 3708194915Sjamie 3709194915Sjamie /* 3710194915Sjamie * SMB privileges. 3711194915Sjamie */ 3712194915Sjamie case PRIV_NETSMB: 3713194915Sjamie#endif 3714194915Sjamie 3715194915Sjamie /* 3716194915Sjamie * No default: or deny here. 3717194915Sjamie * In case of no permit fall through to next switch(). 3718194915Sjamie */ 3719194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3720194915Sjamie return (0); 3721194915Sjamie } 3722194915Sjamie#endif /* VIMAGE */ 3723194915Sjamie 3724194915Sjamie switch (priv) { 3725194915Sjamie 3726194915Sjamie /* 3727164032Srwatson * Allow ktrace privileges for root in jail. 3728164032Srwatson */ 3729164032Srwatson case PRIV_KTRACE: 3730164032Srwatson 3731166827Srwatson#if 0 3732164032Srwatson /* 3733164032Srwatson * Allow jailed processes to configure audit identity and 3734164032Srwatson * submit audit records (login, etc). In the future we may 3735164032Srwatson * want to further refine the relationship between audit and 3736164032Srwatson * jail. 3737164032Srwatson */ 3738164032Srwatson case PRIV_AUDIT_GETAUDIT: 3739164032Srwatson case PRIV_AUDIT_SETAUDIT: 3740164032Srwatson case PRIV_AUDIT_SUBMIT: 3741166827Srwatson#endif 3742164032Srwatson 3743164032Srwatson /* 3744164032Srwatson * Allow jailed processes to manipulate process UNIX 3745164032Srwatson * credentials in any way they see fit. 3746164032Srwatson */ 3747164032Srwatson case PRIV_CRED_SETUID: 3748164032Srwatson case PRIV_CRED_SETEUID: 3749164032Srwatson case PRIV_CRED_SETGID: 3750164032Srwatson case PRIV_CRED_SETEGID: 3751164032Srwatson case PRIV_CRED_SETGROUPS: 3752164032Srwatson case PRIV_CRED_SETREUID: 3753164032Srwatson case PRIV_CRED_SETREGID: 3754164032Srwatson case PRIV_CRED_SETRESUID: 3755164032Srwatson case PRIV_CRED_SETRESGID: 3756164032Srwatson 3757164032Srwatson /* 3758164032Srwatson * Jail implements visibility constraints already, so allow 3759164032Srwatson * jailed root to override uid/gid-based constraints. 3760164032Srwatson */ 3761164032Srwatson case PRIV_SEEOTHERGIDS: 3762164032Srwatson case PRIV_SEEOTHERUIDS: 3763164032Srwatson 3764164032Srwatson /* 3765164032Srwatson * Jail implements inter-process debugging limits already, so 3766164032Srwatson * allow jailed root various debugging privileges. 3767164032Srwatson */ 3768164032Srwatson case PRIV_DEBUG_DIFFCRED: 3769164032Srwatson case PRIV_DEBUG_SUGID: 3770164032Srwatson case PRIV_DEBUG_UNPRIV: 3771164032Srwatson 3772164032Srwatson /* 3773164032Srwatson * Allow jail to set various resource limits and login 3774164032Srwatson * properties, and for now, exceed process resource limits. 3775164032Srwatson */ 3776164032Srwatson case PRIV_PROC_LIMIT: 3777164032Srwatson case PRIV_PROC_SETLOGIN: 3778164032Srwatson case PRIV_PROC_SETRLIMIT: 3779164032Srwatson 3780164032Srwatson /* 3781164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3782164032Srwatson */ 3783164032Srwatson case PRIV_IPC_READ: 3784164032Srwatson case PRIV_IPC_WRITE: 3785164032Srwatson case PRIV_IPC_ADMIN: 3786164032Srwatson case PRIV_IPC_MSGSIZE: 3787164032Srwatson case PRIV_MQ_ADMIN: 3788164032Srwatson 3789164032Srwatson /* 3790192895Sjamie * Jail operations within a jail work on child jails. 3791192895Sjamie */ 3792192895Sjamie case PRIV_JAIL_ATTACH: 3793192895Sjamie case PRIV_JAIL_SET: 3794192895Sjamie case PRIV_JAIL_REMOVE: 3795192895Sjamie 3796192895Sjamie /* 3797164032Srwatson * Jail implements its own inter-process limits, so allow 3798164032Srwatson * root processes in jail to change scheduling on other 3799164032Srwatson * processes in the same jail. Likewise for signalling. 3800164032Srwatson */ 3801164032Srwatson case PRIV_SCHED_DIFFCRED: 3802185435Sbz case PRIV_SCHED_CPUSET: 3803164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3804164032Srwatson case PRIV_SIGNAL_SUGID: 3805164032Srwatson 3806164032Srwatson /* 3807164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3808164032Srwatson * writable. 3809164032Srwatson */ 3810164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 3811164032Srwatson 3812164032Srwatson /* 3813164032Srwatson * Allow root in jail to manage a variety of quota 3814166831Srwatson * properties. These should likely be conditional on a 3815166831Srwatson * configuration option. 3816164032Srwatson */ 3817166832Srwatson case PRIV_VFS_GETQUOTA: 3818166832Srwatson case PRIV_VFS_SETQUOTA: 3819164032Srwatson 3820164032Srwatson /* 3821164032Srwatson * Since Jail relies on chroot() to implement file system 3822164032Srwatson * protections, grant many VFS privileges to root in jail. 3823164032Srwatson * Be careful to exclude mount-related and NFS-related 3824164032Srwatson * privileges. 3825164032Srwatson */ 3826164032Srwatson case PRIV_VFS_READ: 3827164032Srwatson case PRIV_VFS_WRITE: 3828164032Srwatson case PRIV_VFS_ADMIN: 3829164032Srwatson case PRIV_VFS_EXEC: 3830164032Srwatson case PRIV_VFS_LOOKUP: 3831164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3832164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 3833164032Srwatson case PRIV_VFS_CHOWN: 3834164032Srwatson case PRIV_VFS_CHROOT: 3835167152Spjd case PRIV_VFS_RETAINSUGID: 3836164032Srwatson case PRIV_VFS_FCHROOT: 3837164032Srwatson case PRIV_VFS_LINK: 3838164032Srwatson case PRIV_VFS_SETGID: 3839172860Srwatson case PRIV_VFS_STAT: 3840164032Srwatson case PRIV_VFS_STICKYFILE: 3841164032Srwatson return (0); 3842164032Srwatson 3843164032Srwatson /* 3844164032Srwatson * Depending on the global setting, allow privilege of 3845164032Srwatson * setting system flags. 3846164032Srwatson */ 3847164032Srwatson case PRIV_VFS_SYSFLAGS: 3848192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3849164032Srwatson return (0); 3850164032Srwatson else 3851164032Srwatson return (EPERM); 3852164032Srwatson 3853164032Srwatson /* 3854168396Spjd * Depending on the global setting, allow privilege of 3855168396Spjd * mounting/unmounting file systems. 3856168396Spjd */ 3857168396Spjd case PRIV_VFS_MOUNT: 3858168396Spjd case PRIV_VFS_UNMOUNT: 3859168396Spjd case PRIV_VFS_MOUNT_NONUSER: 3860168699Spjd case PRIV_VFS_MOUNT_OWNER: 3861224615Smm if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 3862224615Smm cred->cr_prison->pr_enforce_statfs < 2) 3863168396Spjd return (0); 3864168396Spjd else 3865168396Spjd return (EPERM); 3866168396Spjd 3867168396Spjd /* 3868168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 3869168591Srwatson * ports. 3870164032Srwatson */ 3871164032Srwatson case PRIV_NETINET_RESERVEDPORT: 3872168591Srwatson case PRIV_NETINET_REUSEPORT: 3873164032Srwatson return (0); 3874164032Srwatson 3875164032Srwatson /* 3876175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 3877175630Sbz */ 3878175630Sbz case PRIV_NETINET_SETHDROPTS: 3879175630Sbz return (0); 3880175630Sbz 3881175630Sbz /* 3882164032Srwatson * Conditionally allow creating raw sockets in jail. 3883164032Srwatson */ 3884164032Srwatson case PRIV_NETINET_RAW: 3885192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3886164032Srwatson return (0); 3887164032Srwatson else 3888164032Srwatson return (EPERM); 3889164032Srwatson 3890164032Srwatson /* 3891164032Srwatson * Since jail implements its own visibility limits on netstat 3892164032Srwatson * sysctls, allow getcred. This allows identd to work in 3893164032Srwatson * jail. 3894164032Srwatson */ 3895164032Srwatson case PRIV_NETINET_GETCRED: 3896164032Srwatson return (0); 3897164032Srwatson 3898219304Strasz /* 3899219304Strasz * Allow jailed root to set loginclass. 3900219304Strasz */ 3901219304Strasz case PRIV_PROC_SETLOGINCLASS: 3902219304Strasz return (0); 3903219304Strasz 3904164032Srwatson default: 3905164032Srwatson /* 3906164032Srwatson * In all remaining cases, deny the privilege request. This 3907164032Srwatson * includes almost all network privileges, many system 3908164032Srwatson * configuration privileges. 3909164032Srwatson */ 3910164032Srwatson return (EPERM); 3911164032Srwatson } 3912164032Srwatson} 3913164032Srwatson 3914192895Sjamie/* 3915192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 3916192895Sjamie * if it does not directly follow. 3917192895Sjamie */ 3918192895Sjamie 3919192895Sjamiechar * 3920192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 3921192895Sjamie{ 3922192895Sjamie char *name; 3923192895Sjamie 3924192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 3925192895Sjamie if (pr1 == pr2) 3926192895Sjamie return "0"; 3927192895Sjamie name = pr2->pr_name; 3928192895Sjamie if (prison_ischild(pr1, pr2)) { 3929192895Sjamie /* 3930192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 3931192895Sjamie * so its length can't be counted on. But the number of dots 3932192895Sjamie * can be counted on - and counted. 3933192895Sjamie */ 3934192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3935192895Sjamie name = strchr(name, '.') + 1; 3936192895Sjamie } 3937192895Sjamie return (name); 3938192895Sjamie} 3939192895Sjamie 3940192895Sjamie/* 3941192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 3942192895Sjamie * if it does not directly follow. 3943192895Sjamie */ 3944192895Sjamiestatic char * 3945192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 3946192895Sjamie{ 3947192895Sjamie char *path1, *path2; 3948192895Sjamie int len1; 3949192895Sjamie 3950192895Sjamie path1 = pr1->pr_path; 3951192895Sjamie path2 = pr2->pr_path; 3952192895Sjamie if (!strcmp(path1, "/")) 3953192895Sjamie return (path2); 3954192895Sjamie len1 = strlen(path1); 3955192895Sjamie if (strncmp(path1, path2, len1)) 3956192895Sjamie return (path2); 3957192895Sjamie if (path2[len1] == '\0') 3958192895Sjamie return "/"; 3959192895Sjamie if (path2[len1] == '/') 3960192895Sjamie return (path2 + len1); 3961192895Sjamie return (path2); 3962192895Sjamie} 3963192895Sjamie 3964192895Sjamie 3965192895Sjamie/* 3966192895Sjamie * Jail-related sysctls. 3967192895Sjamie */ 3968227309Sedstatic SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 3969192895Sjamie "Jails"); 3970192895Sjamie 3971113275Smikestatic int 3972113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 3973113275Smike{ 3974191673Sjamie struct xprison *xp; 3975192895Sjamie struct prison *pr, *cpr; 3976191673Sjamie#ifdef INET 3977191673Sjamie struct in_addr *ip4 = NULL; 3978191673Sjamie int ip4s = 0; 3979191673Sjamie#endif 3980191673Sjamie#ifdef INET6 3981208803Scperciva struct in6_addr *ip6 = NULL; 3982191673Sjamie int ip6s = 0; 3983191673Sjamie#endif 3984192895Sjamie int descend, error; 3985113275Smike 3986191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 3987192895Sjamie pr = req->td->td_ucred->cr_prison; 3988191673Sjamie error = 0; 3989168401Spjd sx_slock(&allprison_lock); 3990192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 3991192895Sjamie#if defined(INET) || defined(INET6) 3992191673Sjamie again: 3993192895Sjamie#endif 3994192895Sjamie mtx_lock(&cpr->pr_mtx); 3995185435Sbz#ifdef INET 3996192895Sjamie if (cpr->pr_ip4s > 0) { 3997192895Sjamie if (ip4s < cpr->pr_ip4s) { 3998192895Sjamie ip4s = cpr->pr_ip4s; 3999192895Sjamie mtx_unlock(&cpr->pr_mtx); 4000191673Sjamie ip4 = realloc(ip4, ip4s * 4001191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 4002191673Sjamie goto again; 4003191673Sjamie } 4004192895Sjamie bcopy(cpr->pr_ip4, ip4, 4005192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 4006191673Sjamie } 4007185435Sbz#endif 4008185435Sbz#ifdef INET6 4009192895Sjamie if (cpr->pr_ip6s > 0) { 4010192895Sjamie if (ip6s < cpr->pr_ip6s) { 4011192895Sjamie ip6s = cpr->pr_ip6s; 4012192895Sjamie mtx_unlock(&cpr->pr_mtx); 4013191673Sjamie ip6 = realloc(ip6, ip6s * 4014191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4015191673Sjamie goto again; 4016191673Sjamie } 4017192895Sjamie bcopy(cpr->pr_ip6, ip6, 4018192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 4019191673Sjamie } 4020185435Sbz#endif 4021192895Sjamie if (cpr->pr_ref == 0) { 4022192895Sjamie mtx_unlock(&cpr->pr_mtx); 4023191673Sjamie continue; 4024191673Sjamie } 4025191673Sjamie bzero(xp, sizeof(*xp)); 4026113275Smike xp->pr_version = XPRISON_VERSION; 4027192895Sjamie xp->pr_id = cpr->pr_id; 4028192895Sjamie xp->pr_state = cpr->pr_uref > 0 4029191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4030192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4031194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4032192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4033185435Sbz#ifdef INET 4034192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 4035185435Sbz#endif 4036185435Sbz#ifdef INET6 4037192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4038185435Sbz#endif 4039192895Sjamie mtx_unlock(&cpr->pr_mtx); 4040191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4041191673Sjamie if (error) 4042191673Sjamie break; 4043185435Sbz#ifdef INET 4044191673Sjamie if (xp->pr_ip4s > 0) { 4045191673Sjamie error = SYSCTL_OUT(req, ip4, 4046191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4047191673Sjamie if (error) 4048191673Sjamie break; 4049185435Sbz } 4050185435Sbz#endif 4051185435Sbz#ifdef INET6 4052191673Sjamie if (xp->pr_ip6s > 0) { 4053191673Sjamie error = SYSCTL_OUT(req, ip6, 4054191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4055191673Sjamie if (error) 4056191673Sjamie break; 4057185435Sbz } 4058185435Sbz#endif 4059113275Smike } 4060168401Spjd sx_sunlock(&allprison_lock); 4061191673Sjamie free(xp, M_TEMP); 4062191673Sjamie#ifdef INET 4063191673Sjamie free(ip4, M_TEMP); 4064191673Sjamie#endif 4065191673Sjamie#ifdef INET6 4066191673Sjamie free(ip6, M_TEMP); 4067191673Sjamie#endif 4068167354Spjd return (error); 4069113275Smike} 4070113275Smike 4071187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4072187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4073187864Sed sysctl_jail_list, "S", "List of active jails"); 4074126004Spjd 4075126004Spjdstatic int 4076126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4077126004Spjd{ 4078126004Spjd int error, injail; 4079126004Spjd 4080126004Spjd injail = jailed(req->td->td_ucred); 4081126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4082126004Spjd 4083126004Spjd return (error); 4084126004Spjd} 4085192895Sjamie 4086187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4087187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4088187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4089185435Sbz 4090192895Sjamie#if defined(INET) || defined(INET6) 4091193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4092192895Sjamie &jail_max_af_ips, 0, 4093192895Sjamie "Number of IP addresses a jail may have at most per address family"); 4094192895Sjamie#endif 4095192895Sjamie 4096192895Sjamie/* 4097192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 4098192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4099192895Sjamie * just see their own parameters, and can't change them. 4100192895Sjamie */ 4101192895Sjamiestatic int 4102192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4103192895Sjamie{ 4104192895Sjamie struct prison *pr; 4105192895Sjamie int allow, error, i; 4106192895Sjamie 4107192895Sjamie pr = req->td->td_ucred->cr_prison; 4108192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4109192895Sjamie 4110192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4111192895Sjamie i = (allow & arg2) ? 1 : 0; 4112192895Sjamie if (arg1 != NULL) 4113192895Sjamie i = !i; 4114192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4115192895Sjamie if (error || !req->newptr) 4116192895Sjamie return (error); 4117192895Sjamie i = i ? arg2 : 0; 4118192895Sjamie if (arg1 != NULL) 4119192895Sjamie i ^= arg2; 4120192895Sjamie /* 4121192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4122192895Sjamie * for writing. 4123192895Sjamie */ 4124192895Sjamie mtx_lock(&prison0.pr_mtx); 4125192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4126192895Sjamie mtx_unlock(&prison0.pr_mtx); 4127192895Sjamie return (0); 4128192895Sjamie} 4129192895Sjamie 4130192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4131192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4132192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4133192895Sjamie "Processes in jail can set their hostnames"); 4134192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4135192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4136192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4137192895Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only"); 4138192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4139192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4140192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4141192895Sjamie "Processes in jail can use System V IPC primitives"); 4142192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4143192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4144192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4145192895Sjamie "Prison root can create raw sockets"); 4146192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4147192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4148192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4149192895Sjamie "Processes in jail can alter system file flags"); 4150192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4151192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4152192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4153192895Sjamie "Processes in jail can mount/unmount jail-friendly file systems"); 4154192895Sjamie 4155192895Sjamiestatic int 4156192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4157192895Sjamie{ 4158192895Sjamie struct prison *pr; 4159192895Sjamie int level, error; 4160192895Sjamie 4161192895Sjamie pr = req->td->td_ucred->cr_prison; 4162192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4163192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4164192895Sjamie if (error || !req->newptr) 4165192895Sjamie return (error); 4166192895Sjamie *(int *)arg1 = level; 4167192895Sjamie return (0); 4168192895Sjamie} 4169192895Sjamie 4170192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4171192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4172192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4173192895Sjamie sysctl_jail_default_level, "I", 4174192895Sjamie "Processes in jail cannot see all mounted file systems"); 4175192895Sjamie 4176192895Sjamie/* 4177192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4178192895Sjamie * is returned in the string itself, and the other parameters exist merely 4179192895Sjamie * to make themselves and their types known. 4180192895Sjamie */ 4181192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4182192895Sjamie "Jail parameters"); 4183192895Sjamie 4184192895Sjamieint 4185192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4186192895Sjamie{ 4187192895Sjamie int i; 4188192895Sjamie long l; 4189192895Sjamie size_t s; 4190192895Sjamie char numbuf[12]; 4191192895Sjamie 4192192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4193192895Sjamie { 4194192895Sjamie case CTLTYPE_LONG: 4195192895Sjamie case CTLTYPE_ULONG: 4196192895Sjamie l = 0; 4197192895Sjamie#ifdef SCTL_MASK32 4198192895Sjamie if (!(req->flags & SCTL_MASK32)) 4199192895Sjamie#endif 4200192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4201192895Sjamie case CTLTYPE_INT: 4202192895Sjamie case CTLTYPE_UINT: 4203192895Sjamie i = 0; 4204192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4205192895Sjamie case CTLTYPE_STRING: 4206219819Sjeff snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4207192895Sjamie return 4208192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4209192895Sjamie case CTLTYPE_STRUCT: 4210192895Sjamie s = (size_t)arg2; 4211192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4212192895Sjamie } 4213192895Sjamie return (0); 4214192895Sjamie} 4215192895Sjamie 4216192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4217192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4218192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4219192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4220192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4221192895Sjamie "I", "Jail secure level"); 4222192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4223192895Sjamie "I", "Jail cannot see all mounted file systems"); 4224192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4225192895Sjamie "B", "Jail persistence"); 4226194251Sjamie#ifdef VIMAGE 4227194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4228195870Sjamie "E,jailsys", "Virtual network stack"); 4229194251Sjamie#endif 4230192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4231192895Sjamie "B", "Jail is in the process of shutting down"); 4232192895Sjamie 4233194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4234194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4235194762Sjamie "I", "Current number of child jails"); 4236194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4237194762Sjamie "I", "Maximum number of child jails"); 4238194762Sjamie 4239195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4240192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4241192895Sjamie "Jail hostname"); 4242193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4243193066Sjamie "Jail NIS domainname"); 4244193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4245193066Sjamie "Jail host UUID"); 4246193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4247193066Sjamie "LU", "Jail host ID"); 4248192895Sjamie 4249192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4250192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4251192895Sjamie 4252192895Sjamie#ifdef INET 4253195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4254195974Sjamie "Jail IPv4 address virtualization"); 4255192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4256192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4257202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4258202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4259202468Sbz "primary jail IPv4 address."); 4260192895Sjamie#endif 4261192895Sjamie#ifdef INET6 4262195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4263195974Sjamie "Jail IPv6 address virtualization"); 4264192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4265192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4266202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4267202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4268202468Sbz "primary jail IPv6 address."); 4269192895Sjamie#endif 4270192895Sjamie 4271192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4272192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4273192895Sjamie "B", "Jail may set hostname"); 4274192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4275192895Sjamie "B", "Jail may use SYSV IPC"); 4276192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4277192895Sjamie "B", "Jail may create raw sockets"); 4278192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4279192895Sjamie "B", "Jail may alter system file flags"); 4280192895SjamieSYSCTL_JAIL_PARAM(_allow, mount, CTLTYPE_INT | CTLFLAG_RW, 4281192895Sjamie "B", "Jail may mount/unmount jail-friendly file systems"); 4282192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4283192895Sjamie "B", "Jail may set file quotas"); 4284192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4285192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4286192895Sjamie 4287220137Straszvoid 4288220137Straszprison_racct_foreach(void (*callback)(struct racct *racct, 4289220137Strasz void *arg2, void *arg3), void *arg2, void *arg3) 4290220137Strasz{ 4291221362Strasz struct prison_racct *prr; 4292192895Sjamie 4293220137Strasz sx_slock(&allprison_lock); 4294221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) 4295221362Strasz (callback)(prr->prr_racct, arg2, arg3); 4296220137Strasz sx_sunlock(&allprison_lock); 4297220137Strasz} 4298220137Strasz 4299221362Straszstatic struct prison_racct * 4300221362Straszprison_racct_find_locked(const char *name) 4301221362Strasz{ 4302221362Strasz struct prison_racct *prr; 4303221362Strasz 4304221362Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4305221362Strasz 4306221362Strasz if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4307221362Strasz return (NULL); 4308221362Strasz 4309221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) { 4310221362Strasz if (strcmp(name, prr->prr_name) != 0) 4311221362Strasz continue; 4312221362Strasz 4313221362Strasz /* Found prison_racct with a matching name? */ 4314221362Strasz prison_racct_hold(prr); 4315221362Strasz return (prr); 4316221362Strasz } 4317221362Strasz 4318221362Strasz /* Add new prison_racct. */ 4319221362Strasz prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4320221362Strasz racct_create(&prr->prr_racct); 4321221362Strasz 4322221362Strasz strcpy(prr->prr_name, name); 4323221362Strasz refcount_init(&prr->prr_refcount, 1); 4324221362Strasz LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4325221362Strasz 4326221362Strasz return (prr); 4327221362Strasz} 4328221362Strasz 4329221362Straszstruct prison_racct * 4330221362Straszprison_racct_find(const char *name) 4331221362Strasz{ 4332221362Strasz struct prison_racct *prr; 4333221362Strasz 4334221362Strasz sx_xlock(&allprison_lock); 4335221362Strasz prr = prison_racct_find_locked(name); 4336221362Strasz sx_xunlock(&allprison_lock); 4337221362Strasz return (prr); 4338221362Strasz} 4339221362Strasz 4340221362Straszvoid 4341221362Straszprison_racct_hold(struct prison_racct *prr) 4342221362Strasz{ 4343221362Strasz 4344221362Strasz refcount_acquire(&prr->prr_refcount); 4345221362Strasz} 4346221362Strasz 4347221362Straszvoid 4348221362Straszprison_racct_free(struct prison_racct *prr) 4349221362Strasz{ 4350221362Strasz int old; 4351221362Strasz 4352221362Strasz old = prr->prr_refcount; 4353221362Strasz if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4354221362Strasz return; 4355221362Strasz 4356221362Strasz sx_xlock(&allprison_lock); 4357221362Strasz if (refcount_release(&prr->prr_refcount)) { 4358221362Strasz racct_destroy(&prr->prr_racct); 4359221362Strasz LIST_REMOVE(prr, prr_next); 4360221362Strasz sx_xunlock(&allprison_lock); 4361221362Strasz free(prr, M_PRISON_RACCT); 4362221362Strasz 4363221362Strasz return; 4364221362Strasz } 4365221362Strasz sx_xunlock(&allprison_lock); 4366221362Strasz} 4367221362Strasz 4368221362Strasz#ifdef RACCT 4369221362Straszstatic void 4370221362Straszprison_racct_attach(struct prison *pr) 4371221362Strasz{ 4372221362Strasz struct prison_racct *prr; 4373221362Strasz 4374221362Strasz prr = prison_racct_find_locked(pr->pr_name); 4375221362Strasz KASSERT(prr != NULL, ("cannot find prison_racct")); 4376221362Strasz 4377221362Strasz pr->pr_prison_racct = prr; 4378221362Strasz} 4379221362Strasz 4380221362Straszstatic void 4381221362Straszprison_racct_detach(struct prison *pr) 4382221362Strasz{ 4383221362Strasz prison_racct_free(pr->pr_prison_racct); 4384221362Strasz pr->pr_prison_racct = NULL; 4385221362Strasz} 4386221362Strasz#endif /* RACCT */ 4387221362Strasz 4388185435Sbz#ifdef DDB 4389191673Sjamie 4390191673Sjamiestatic void 4391191673Sjamiedb_show_prison(struct prison *pr) 4392185435Sbz{ 4393192895Sjamie int fi; 4394191673Sjamie#if defined(INET) || defined(INET6) 4395191673Sjamie int ii; 4396185435Sbz#endif 4397195870Sjamie unsigned jsf; 4398185435Sbz#ifdef INET6 4399185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4400185435Sbz#endif 4401185435Sbz 4402191673Sjamie db_printf("prison %p:\n", pr); 4403191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4404191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4405192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4406191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4407191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4408191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4409191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4410191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4411194251Sjamie#ifdef VIMAGE 4412194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4413194251Sjamie#endif 4414191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4415191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4416202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4417202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4418192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4419192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4420202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4421192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4422192895Sjamie fi++) 4423192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4424192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4425195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4426195870Sjamie fi++) { 4427195870Sjamie jsf = pr->pr_flags & 4428195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4429195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4430195870Sjamie pr_flag_jailsys[fi].disable && 4431195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4432195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4433195870Sjamie : "inherit"); 4434195870Sjamie } 4435202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4436192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4437192895Sjamie fi++) 4438192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4439192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4440191673Sjamie db_printf("\n"); 4441192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4442194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4443194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4444194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4445193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4446185435Sbz#ifdef INET 4447191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4448191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4449191673Sjamie db_printf(" %s %s\n", 4450202123Sbz ii == 0 ? "ip4.addr =" : " ", 4451191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4452185435Sbz#endif 4453185435Sbz#ifdef INET6 4454191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4455191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4456191673Sjamie db_printf(" %s %s\n", 4457202123Sbz ii == 0 ? "ip6.addr =" : " ", 4458191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4459191673Sjamie#endif 4460191673Sjamie} 4461191673Sjamie 4462191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4463191673Sjamie{ 4464191673Sjamie struct prison *pr; 4465191673Sjamie 4466191673Sjamie if (!have_addr) { 4467192895Sjamie /* 4468192895Sjamie * Show all prisons in the list, and prison0 which is not 4469192895Sjamie * listed. 4470192895Sjamie */ 4471192895Sjamie db_show_prison(&prison0); 4472192895Sjamie if (!db_pager_quit) { 4473192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4474192895Sjamie db_show_prison(pr); 4475192895Sjamie if (db_pager_quit) 4476192895Sjamie break; 4477192895Sjamie } 4478191673Sjamie } 4479191673Sjamie return; 4480191673Sjamie } 4481191673Sjamie 4482192895Sjamie if (addr == 0) 4483192895Sjamie pr = &prison0; 4484192895Sjamie else { 4485192895Sjamie /* Look for a prison with the ID and with references. */ 4486191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4487192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4488191673Sjamie break; 4489192895Sjamie if (pr == NULL) 4490192895Sjamie /* Look again, without requiring a reference. */ 4491192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4492192895Sjamie if (pr->pr_id == addr) 4493192895Sjamie break; 4494192895Sjamie if (pr == NULL) 4495192895Sjamie /* Assume address points to a valid prison. */ 4496192895Sjamie pr = (struct prison *)addr; 4497192895Sjamie } 4498191673Sjamie db_show_prison(pr); 4499185435Sbz} 4500191673Sjamie 4501185435Sbz#endif /* DDB */ 4502