kern_jail.c revision 202468
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 202468 2010-01-17 12:57:11Z bz $"); 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> 52168401Spjd#include <sys/sx.h> 53193066Sjamie#include <sys/sysent.h> 54113275Smike#include <sys/namei.h> 55147185Spjd#include <sys/mount.h> 56113275Smike#include <sys/queue.h> 5746155Sphk#include <sys/socket.h> 58113275Smike#include <sys/syscallsubr.h> 5957163Srwatson#include <sys/sysctl.h> 60113275Smike#include <sys/vnode.h> 61196019Srwatson 6246155Sphk#include <net/if.h> 63196019Srwatson#include <net/vnet.h> 64196019Srwatson 6546155Sphk#include <netinet/in.h> 66196019Srwatson 67185435Sbz#ifdef DDB 68185435Sbz#include <ddb/ddb.h> 69185435Sbz#ifdef INET6 70185435Sbz#include <netinet6/in6_var.h> 71185435Sbz#endif /* INET6 */ 72185435Sbz#endif /* DDB */ 7346155Sphk 74163606Srwatson#include <security/mac/mac_framework.h> 75163606Srwatson 76195944Sjamie#define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" 77195944Sjamie 7846155SphkMALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 7946155Sphk 80202468Sbz/* Keep struct prison prison0 and some code in kern_jail_set() readable. */ 81202468Sbz#ifdef INET 82202468Sbz#ifdef INET6 83202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL 84202468Sbz#else 85202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL 86202468Sbz#endif 87202468Sbz#else /* !INET */ 88202468Sbz#ifdef INET6 89202468Sbz#define _PR_IP_SADDRSEL PR_IP6_SADDRSEL 90202468Sbz#else 91202468Sbz#define _PR_IP_SADDRSEL 0 92202468Sbz#endif 93202468Sbz#endif 94202468Sbz 95192895Sjamie/* prison0 describes what is "real" about the system. */ 96192895Sjamiestruct prison prison0 = { 97192895Sjamie .pr_id = 0, 98192895Sjamie .pr_name = "0", 99192895Sjamie .pr_ref = 1, 100192895Sjamie .pr_uref = 1, 101192895Sjamie .pr_path = "/", 102192895Sjamie .pr_securelevel = -1, 103194762Sjamie .pr_childmax = JAIL_MAX, 104195944Sjamie .pr_hostuuid = DEFAULT_HOSTUUID, 105201145Santoine .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), 106196176Sbz#ifdef VIMAGE 107202468Sbz .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, 108196176Sbz#else 109202468Sbz .pr_flags = PR_HOST|_PR_IP_SADDRSEL, 110196176Sbz#endif 111192895Sjamie .pr_allow = PR_ALLOW_ALL, 112192895Sjamie}; 113192895SjamieMTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); 11457163Srwatson 115192895Sjamie/* allprison and lastprid are protected by allprison_lock. */ 116168401Spjdstruct sx allprison_lock; 117191673SjamieSX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); 118191673Sjamiestruct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); 119179881Sdelphijint lastprid = 0; 120113275Smike 121191673Sjamiestatic int do_jail_attach(struct thread *td, struct prison *pr); 122190466Sjamiestatic void prison_complete(void *context, int pending); 123191673Sjamiestatic void prison_deref(struct prison *pr, int flags); 124192895Sjamiestatic char *prison_path(struct prison *pr1, struct prison *pr2); 125192895Sjamiestatic void prison_remove_one(struct prison *pr); 126185435Sbz#ifdef INET 127190466Sjamiestatic int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 128192895Sjamiestatic int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 129185435Sbz#endif 130185435Sbz#ifdef INET6 131190466Sjamiestatic int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 132192895Sjamiestatic int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 133185435Sbz#endif 134113275Smike 135191673Sjamie/* Flags for prison_deref */ 136191673Sjamie#define PD_DEREF 0x01 137191673Sjamie#define PD_DEUREF 0x02 138191673Sjamie#define PD_LOCKED 0x04 139191673Sjamie#define PD_LIST_SLOCKED 0x08 140191673Sjamie#define PD_LIST_XLOCKED 0x10 141113275Smike 142192895Sjamie/* 143192895Sjamie * Parameter names corresponding to PR_* flag values 144192895Sjamie */ 145192895Sjamiestatic char *pr_flag_names[] = { 146192895Sjamie [0] = "persist", 147202468Sbz#ifdef INET 148202468Sbz [7] = "ip4.saddrsel", 149202468Sbz#endif 150202468Sbz#ifdef INET6 151202468Sbz [8] = "ip6.saddrsel", 152202468Sbz#endif 153192895Sjamie}; 154192895Sjamie 155192895Sjamiestatic char *pr_flag_nonames[] = { 156192895Sjamie [0] = "nopersist", 157202468Sbz#ifdef INET 158202468Sbz [7] = "ip4.nosaddrsel", 159202468Sbz#endif 160202468Sbz#ifdef INET6 161202468Sbz [8] = "ip6.nosaddrsel", 162202468Sbz#endif 163195870Sjamie}; 164195870Sjamie 165195870Sjamiestruct jailsys_flags { 166195870Sjamie const char *name; 167195870Sjamie unsigned disable; 168195870Sjamie unsigned new; 169195870Sjamie} pr_flag_jailsys[] = { 170195870Sjamie { "host", 0, PR_HOST }, 171195870Sjamie#ifdef VIMAGE 172195870Sjamie { "vnet", 0, PR_VNET }, 173195870Sjamie#endif 174192895Sjamie#ifdef INET 175195870Sjamie { "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER }, 176192895Sjamie#endif 177192895Sjamie#ifdef INET6 178195870Sjamie { "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER }, 179192895Sjamie#endif 180192895Sjamie}; 181192895Sjamie 182192895Sjamiestatic char *pr_allow_names[] = { 183192895Sjamie "allow.set_hostname", 184192895Sjamie "allow.sysvipc", 185192895Sjamie "allow.raw_sockets", 186192895Sjamie "allow.chflags", 187192895Sjamie "allow.mount", 188192895Sjamie "allow.quotas", 189192895Sjamie "allow.socket_af", 190192895Sjamie}; 191192895Sjamie 192192895Sjamiestatic char *pr_allow_nonames[] = { 193192895Sjamie "allow.noset_hostname", 194192895Sjamie "allow.nosysvipc", 195192895Sjamie "allow.noraw_sockets", 196192895Sjamie "allow.nochflags", 197192895Sjamie "allow.nomount", 198192895Sjamie "allow.noquotas", 199192895Sjamie "allow.nosocket_af", 200192895Sjamie}; 201192895Sjamie 202196002Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 203196002Sjamie#define JAIL_DEFAULT_ENFORCE_STATFS 2 204192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 205196002Sjamiestatic int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 206192895Sjamie#if defined(INET) || defined(INET6) 207193865Sjamiestatic unsigned jail_max_af_ips = 255; 208192895Sjamie#endif 209192895Sjamie 210192895Sjamie#ifdef INET 211185435Sbzstatic int 212185435Sbzqcmp_v4(const void *ip1, const void *ip2) 213185435Sbz{ 214185435Sbz in_addr_t iaa, iab; 215185435Sbz 216185435Sbz /* 217185435Sbz * We need to compare in HBO here to get the list sorted as expected 218185435Sbz * by the result of the code. Sorting NBO addresses gives you 219185435Sbz * interesting results. If you do not understand, do not try. 220185435Sbz */ 221185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 222185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 223185435Sbz 224185435Sbz /* 225185435Sbz * Do not simply return the difference of the two numbers, the int is 226185435Sbz * not wide enough. 227185435Sbz */ 228185435Sbz if (iaa > iab) 229185435Sbz return (1); 230185435Sbz else if (iaa < iab) 231185435Sbz return (-1); 232185435Sbz else 233185435Sbz return (0); 234185435Sbz} 235185435Sbz#endif 236185435Sbz 237185435Sbz#ifdef INET6 238185435Sbzstatic int 239185435Sbzqcmp_v6(const void *ip1, const void *ip2) 240185435Sbz{ 241185435Sbz const struct in6_addr *ia6a, *ia6b; 242185435Sbz int i, rc; 243185435Sbz 244185435Sbz ia6a = (const struct in6_addr *)ip1; 245185435Sbz ia6b = (const struct in6_addr *)ip2; 246185435Sbz 247185435Sbz rc = 0; 248190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 249185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 250185435Sbz rc = 1; 251185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 252185435Sbz rc = -1; 253185435Sbz } 254185435Sbz return (rc); 255185435Sbz} 256185435Sbz#endif 257185435Sbz 258191673Sjamie/* 259191673Sjamie * struct jail_args { 260191673Sjamie * struct jail *jail; 261191673Sjamie * }; 262191673Sjamie */ 263191673Sjamieint 264191673Sjamiejail(struct thread *td, struct jail_args *uap) 265185435Sbz{ 266191673Sjamie uint32_t version; 267191673Sjamie int error; 268192895Sjamie struct jail j; 269185435Sbz 270191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 271191673Sjamie if (error) 272191673Sjamie return (error); 273185435Sbz 274191673Sjamie switch (version) { 275191673Sjamie case 0: 276191673Sjamie { 277191673Sjamie struct jail_v0 j0; 278185435Sbz 279192895Sjamie /* FreeBSD single IPv4 jails. */ 280192895Sjamie bzero(&j, sizeof(struct jail)); 281191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 282191673Sjamie if (error) 283191673Sjamie return (error); 284192895Sjamie j.version = j0.version; 285192895Sjamie j.path = j0.path; 286192895Sjamie j.hostname = j0.hostname; 287192895Sjamie j.ip4s = j0.ip_number; 288191673Sjamie break; 289191673Sjamie } 290191673Sjamie 291191673Sjamie case 1: 292185435Sbz /* 293191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 294191673Sjamie * that never made it into the official kernel. 295185435Sbz */ 296191673Sjamie return (EINVAL); 297185435Sbz 298191673Sjamie case 2: /* JAIL_API_VERSION */ 299191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 300191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 301191673Sjamie if (error) 302191673Sjamie return (error); 303192895Sjamie break; 304192895Sjamie 305192895Sjamie default: 306192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 307192895Sjamie return (EINVAL); 308192895Sjamie } 309192895Sjamie return (kern_jail(td, &j)); 310192895Sjamie} 311192895Sjamie 312192895Sjamieint 313192895Sjamiekern_jail(struct thread *td, struct jail *j) 314192895Sjamie{ 315193865Sjamie struct iovec optiov[2 * (4 316193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 317193865Sjamie#ifdef INET 318193865Sjamie + 1 319193865Sjamie#endif 320193865Sjamie#ifdef INET6 321193865Sjamie + 1 322193865Sjamie#endif 323193865Sjamie )]; 324192895Sjamie struct uio opt; 325192895Sjamie char *u_path, *u_hostname, *u_name; 326185435Sbz#ifdef INET 327193865Sjamie uint32_t ip4s; 328192895Sjamie struct in_addr *u_ip4; 329192895Sjamie#endif 330192895Sjamie#ifdef INET6 331192895Sjamie struct in6_addr *u_ip6; 332192895Sjamie#endif 333192895Sjamie size_t tmplen; 334192895Sjamie int error, enforce_statfs, fi; 335192895Sjamie 336192895Sjamie bzero(&optiov, sizeof(optiov)); 337192895Sjamie opt.uio_iov = optiov; 338192895Sjamie opt.uio_iovcnt = 0; 339192895Sjamie opt.uio_offset = -1; 340192895Sjamie opt.uio_resid = -1; 341192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 342192895Sjamie opt.uio_rw = UIO_READ; 343192895Sjamie opt.uio_td = td; 344192895Sjamie 345192895Sjamie /* Set permissions for top-level jails from sysctls. */ 346192895Sjamie if (!jailed(td->td_ucred)) { 347192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 348192895Sjamie sizeof(pr_allow_names[0]); fi++) { 349192895Sjamie optiov[opt.uio_iovcnt].iov_base = 350192895Sjamie (jail_default_allow & (1 << fi)) 351192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 352192895Sjamie optiov[opt.uio_iovcnt].iov_len = 353192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 354192895Sjamie opt.uio_iovcnt += 2; 355192895Sjamie } 356192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 357192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 358192895Sjamie opt.uio_iovcnt++; 359192895Sjamie enforce_statfs = jail_default_enforce_statfs; 360192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 361192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 362192895Sjamie opt.uio_iovcnt++; 363192895Sjamie } 364192895Sjamie 365192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 366192895Sjamie#ifdef INET 367192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 368192895Sjamie if (ip4s > jail_max_af_ips) 369192895Sjamie return (EINVAL); 370192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 371191673Sjamie#else 372192895Sjamie if (j->ip4s > 0) 373192895Sjamie return (EINVAL); 374191673Sjamie#endif 375191673Sjamie#ifdef INET6 376192895Sjamie if (j->ip6s > jail_max_af_ips) 377192895Sjamie return (EINVAL); 378192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 379191673Sjamie#else 380192895Sjamie if (j->ip6s > 0) 381192895Sjamie return (EINVAL); 382191673Sjamie#endif 383192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 384192895Sjamie u_hostname = u_path + MAXPATHLEN; 385192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 386191673Sjamie#ifdef INET 387192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 388191673Sjamie#endif 389191673Sjamie#ifdef INET6 390191673Sjamie#ifdef INET 391192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 392191673Sjamie#else 393192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 394191673Sjamie#endif 395191673Sjamie#endif 396192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 397192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 398192895Sjamie opt.uio_iovcnt++; 399192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 400192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 401192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 402192895Sjamie if (error) { 403192895Sjamie free(u_path, M_TEMP); 404192895Sjamie return (error); 405192895Sjamie } 406192895Sjamie opt.uio_iovcnt++; 407192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 408192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 409192895Sjamie opt.uio_iovcnt++; 410192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 411192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 412192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 413192895Sjamie if (error) { 414192895Sjamie free(u_path, M_TEMP); 415192895Sjamie return (error); 416192895Sjamie } 417192895Sjamie opt.uio_iovcnt++; 418192895Sjamie if (j->jailname != NULL) { 419192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 420192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 421192895Sjamie opt.uio_iovcnt++; 422192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 423192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 424192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 425191673Sjamie if (error) { 426191673Sjamie free(u_path, M_TEMP); 427191673Sjamie return (error); 428191673Sjamie } 429192895Sjamie opt.uio_iovcnt++; 430192895Sjamie } 431191673Sjamie#ifdef INET 432192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 433192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 434192895Sjamie opt.uio_iovcnt++; 435192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 436192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 437192895Sjamie if (j->version == 0) 438192895Sjamie u_ip4->s_addr = j->ip4s; 439192895Sjamie else { 440192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 441191673Sjamie if (error) { 442191673Sjamie free(u_path, M_TEMP); 443191673Sjamie return (error); 444191673Sjamie } 445192895Sjamie } 446192895Sjamie opt.uio_iovcnt++; 447185435Sbz#endif 448185435Sbz#ifdef INET6 449192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 450192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 451192895Sjamie opt.uio_iovcnt++; 452192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 453192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 454192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 455192895Sjamie if (error) { 456192895Sjamie free(u_path, M_TEMP); 457192895Sjamie return (error); 458192895Sjamie } 459192895Sjamie opt.uio_iovcnt++; 460185435Sbz#endif 461192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 462192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 463191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 464191673Sjamie free(u_path, M_TEMP); 465191673Sjamie return (error); 466185435Sbz} 467185435Sbz 468192895Sjamie 469191673Sjamie/* 470191673Sjamie * struct jail_set_args { 471191673Sjamie * struct iovec *iovp; 472191673Sjamie * unsigned int iovcnt; 473191673Sjamie * int flags; 474191673Sjamie * }; 475191673Sjamie */ 476191673Sjamieint 477191673Sjamiejail_set(struct thread *td, struct jail_set_args *uap) 478185435Sbz{ 479191673Sjamie struct uio *auio; 480191673Sjamie int error; 481191673Sjamie 482191673Sjamie /* Check that we have an even number of iovecs. */ 483191673Sjamie if (uap->iovcnt & 1) 484191673Sjamie return (EINVAL); 485191673Sjamie 486191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 487191673Sjamie if (error) 488191673Sjamie return (error); 489191673Sjamie error = kern_jail_set(td, auio, uap->flags); 490191673Sjamie free(auio, M_IOV); 491191673Sjamie return (error); 492191673Sjamie} 493191673Sjamie 494191673Sjamieint 495191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 496191673Sjamie{ 497191673Sjamie struct nameidata nd; 498185435Sbz#ifdef INET 499190466Sjamie struct in_addr *ip4; 500185435Sbz#endif 501185435Sbz#ifdef INET6 502185435Sbz struct in6_addr *ip6; 503185435Sbz#endif 504191673Sjamie struct vfsopt *opt; 505191673Sjamie struct vfsoptlist *opts; 506196135Sbz struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 507191673Sjamie struct vnode *root; 508196835Sjamie char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 509192895Sjamie#if defined(INET) || defined(INET6) 510196135Sbz struct prison *tppr; 511191673Sjamie void *op; 512192895Sjamie#endif 513193066Sjamie unsigned long hid; 514192895Sjamie size_t namelen, onamelen; 515192895Sjamie int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 516195870Sjamie int gotchildmax, gotenforce, gothid, gotslevel; 517195870Sjamie int fi, jid, jsys, len, level; 518194762Sjamie int childmax, slevel, vfslocked; 519191673Sjamie#if defined(INET) || defined(INET6) 520192895Sjamie int ii, ij; 521191673Sjamie#endif 522191673Sjamie#ifdef INET 523195974Sjamie int ip4s, redo_ip4; 524191673Sjamie#endif 525191673Sjamie#ifdef INET6 526195974Sjamie int ip6s, redo_ip6; 527191673Sjamie#endif 528191673Sjamie unsigned pr_flags, ch_flags; 529192895Sjamie unsigned pr_allow, ch_allow, tallow; 530191673Sjamie char numbuf[12]; 531185435Sbz 532191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 533191673Sjamie if (!error && (flags & JAIL_ATTACH)) 534191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 535191673Sjamie if (error) 536191673Sjamie return (error); 537192895Sjamie mypr = ppr = td->td_ucred->cr_prison; 538194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 539192895Sjamie return (EPERM); 540191673Sjamie if (flags & ~JAIL_SET_MASK) 541191673Sjamie return (EINVAL); 542191673Sjamie 543185435Sbz /* 544191673Sjamie * Check all the parameters before committing to anything. Not all 545191673Sjamie * errors can be caught early, but we may as well try. Also, this 546191673Sjamie * takes care of some expensive stuff (path lookup) before getting 547191673Sjamie * the allprison lock. 548185435Sbz * 549191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 550191673Sjamie * options. But it makes more sense to re-use the vfsopt code 551191673Sjamie * than duplicate it under a different name. 552185435Sbz */ 553191673Sjamie error = vfs_buildopts(optuio, &opts); 554191673Sjamie if (error) 555191673Sjamie return (error); 556185435Sbz#ifdef INET 557185435Sbz ip4 = NULL; 558185435Sbz#endif 559185435Sbz#ifdef INET6 560185435Sbz ip6 = NULL; 561185435Sbz#endif 562191673Sjamie 563191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 564191673Sjamie if (error == ENOENT) 565191673Sjamie jid = 0; 566191673Sjamie else if (error != 0) 567191673Sjamie goto done_free; 568191673Sjamie 569191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 570191673Sjamie if (error == ENOENT) 571191673Sjamie gotslevel = 0; 572191673Sjamie else if (error != 0) 573191673Sjamie goto done_free; 574191673Sjamie else 575191673Sjamie gotslevel = 1; 576191673Sjamie 577194762Sjamie error = 578194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 579194762Sjamie if (error == ENOENT) 580194762Sjamie gotchildmax = 0; 581194762Sjamie else if (error != 0) 582194762Sjamie goto done_free; 583194762Sjamie else 584194762Sjamie gotchildmax = 1; 585194762Sjamie 586192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 587192895Sjamie gotenforce = (error == 0); 588192895Sjamie if (gotenforce) { 589192895Sjamie if (enforce < 0 || enforce > 2) 590192895Sjamie return (EINVAL); 591192895Sjamie } else if (error != ENOENT) 592192895Sjamie goto done_free; 593192895Sjamie 594191673Sjamie pr_flags = ch_flags = 0; 595192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 596192895Sjamie fi++) { 597192895Sjamie if (pr_flag_names[fi] == NULL) 598192895Sjamie continue; 599192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 600192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 601192895Sjamie } 602191673Sjamie ch_flags |= pr_flags; 603195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 604195870Sjamie fi++) { 605195870Sjamie error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 606195870Sjamie sizeof(jsys)); 607195870Sjamie if (error == ENOENT) 608195870Sjamie continue; 609195870Sjamie if (error != 0) 610195870Sjamie goto done_free; 611195870Sjamie switch (jsys) { 612195870Sjamie case JAIL_SYS_DISABLE: 613195870Sjamie if (!pr_flag_jailsys[fi].disable) { 614195870Sjamie error = EINVAL; 615195870Sjamie goto done_free; 616195870Sjamie } 617195870Sjamie pr_flags |= pr_flag_jailsys[fi].disable; 618195870Sjamie break; 619195870Sjamie case JAIL_SYS_NEW: 620195870Sjamie pr_flags |= pr_flag_jailsys[fi].new; 621195870Sjamie break; 622195870Sjamie case JAIL_SYS_INHERIT: 623195870Sjamie break; 624195870Sjamie default: 625195870Sjamie error = EINVAL; 626195870Sjamie goto done_free; 627195870Sjamie } 628195870Sjamie ch_flags |= 629195870Sjamie pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 630195870Sjamie } 631191673Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 632191673Sjamie && !(pr_flags & PR_PERSIST)) { 633191673Sjamie error = EINVAL; 634191673Sjamie vfs_opterror(opts, "new jail must persist or attach"); 635191673Sjamie goto done_errmsg; 636191673Sjamie } 637194251Sjamie#ifdef VIMAGE 638194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 639194251Sjamie error = EINVAL; 640194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 641194251Sjamie goto done_errmsg; 642194251Sjamie } 643194251Sjamie#endif 644195974Sjamie#ifdef INET 645195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 646195974Sjamie error = EINVAL; 647195974Sjamie vfs_opterror(opts, "ip4 cannot be changed after creation"); 648195974Sjamie goto done_errmsg; 649195974Sjamie } 650195974Sjamie#endif 651195974Sjamie#ifdef INET6 652195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 653195974Sjamie error = EINVAL; 654195974Sjamie vfs_opterror(opts, "ip6 cannot be changed after creation"); 655195974Sjamie goto done_errmsg; 656195974Sjamie } 657195974Sjamie#endif 658191673Sjamie 659192895Sjamie pr_allow = ch_allow = 0; 660192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 661192895Sjamie fi++) { 662192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 663192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 664192895Sjamie } 665192895Sjamie ch_allow |= pr_allow; 666192895Sjamie 667191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 668191673Sjamie if (error == ENOENT) 669191673Sjamie name = NULL; 670191673Sjamie else if (error != 0) 671191673Sjamie goto done_free; 672191673Sjamie else { 673191673Sjamie if (len == 0 || name[len - 1] != '\0') { 674191673Sjamie error = EINVAL; 675191673Sjamie goto done_free; 676191673Sjamie } 677191673Sjamie if (len > MAXHOSTNAMELEN) { 678191673Sjamie error = ENAMETOOLONG; 679191673Sjamie goto done_free; 680191673Sjamie } 681191673Sjamie } 682191673Sjamie 683191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 684191673Sjamie if (error == ENOENT) 685191673Sjamie host = NULL; 686191673Sjamie else if (error != 0) 687191673Sjamie goto done_free; 688191673Sjamie else { 689193066Sjamie ch_flags |= PR_HOST; 690193066Sjamie pr_flags |= PR_HOST; 691191673Sjamie if (len == 0 || host[len - 1] != '\0') { 692191673Sjamie error = EINVAL; 693191673Sjamie goto done_free; 694191673Sjamie } 695191673Sjamie if (len > MAXHOSTNAMELEN) { 696191673Sjamie error = ENAMETOOLONG; 697191673Sjamie goto done_free; 698191673Sjamie } 699191673Sjamie } 700191673Sjamie 701193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 702193066Sjamie if (error == ENOENT) 703193066Sjamie domain = NULL; 704193066Sjamie else if (error != 0) 705193066Sjamie goto done_free; 706193066Sjamie else { 707193066Sjamie ch_flags |= PR_HOST; 708193066Sjamie pr_flags |= PR_HOST; 709193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 710193066Sjamie error = EINVAL; 711193066Sjamie goto done_free; 712193066Sjamie } 713193066Sjamie if (len > MAXHOSTNAMELEN) { 714193066Sjamie error = ENAMETOOLONG; 715193066Sjamie goto done_free; 716193066Sjamie } 717193066Sjamie } 718193066Sjamie 719193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 720193066Sjamie if (error == ENOENT) 721193066Sjamie uuid = NULL; 722193066Sjamie else if (error != 0) 723193066Sjamie goto done_free; 724193066Sjamie else { 725193066Sjamie ch_flags |= PR_HOST; 726193066Sjamie pr_flags |= PR_HOST; 727193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 728193066Sjamie error = EINVAL; 729193066Sjamie goto done_free; 730193066Sjamie } 731193066Sjamie if (len > HOSTUUIDLEN) { 732193066Sjamie error = ENAMETOOLONG; 733193066Sjamie goto done_free; 734193066Sjamie } 735193066Sjamie } 736193066Sjamie 737193066Sjamie#ifdef COMPAT_IA32 738193066Sjamie if (td->td_proc->p_sysent->sv_flags & SV_IA32) { 739193066Sjamie uint32_t hid32; 740193066Sjamie 741193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 742193066Sjamie hid = hid32; 743193066Sjamie } else 744193066Sjamie#endif 745193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 746193066Sjamie if (error == ENOENT) 747193066Sjamie gothid = 0; 748193066Sjamie else if (error != 0) 749193066Sjamie goto done_free; 750193066Sjamie else { 751193066Sjamie gothid = 1; 752193066Sjamie ch_flags |= PR_HOST; 753193066Sjamie pr_flags |= PR_HOST; 754193066Sjamie } 755193066Sjamie 756185435Sbz#ifdef INET 757191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 758191673Sjamie if (error == ENOENT) 759195870Sjamie ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1; 760191673Sjamie else if (error != 0) 761191673Sjamie goto done_free; 762191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 763191673Sjamie error = EINVAL; 764191673Sjamie goto done_free; 765192895Sjamie } else { 766195870Sjamie ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 767195870Sjamie if (ip4s == 0) 768195870Sjamie pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 769195870Sjamie else { 770195870Sjamie pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 771192895Sjamie ip4s /= sizeof(*ip4); 772192895Sjamie if (ip4s > jail_max_af_ips) { 773185435Sbz error = EINVAL; 774192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 775192895Sjamie goto done_errmsg; 776185435Sbz } 777195974Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 778192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 779192895Sjamie /* 780192895Sjamie * IP addresses are all sorted but ip[0] to preserve 781192895Sjamie * the primary IP address as given from userland. 782192895Sjamie * This special IP is used for unbound outgoing 783202116Sbz * connections as well for "loopback" traffic in case 784202116Sbz * source address selection cannot find any more fitting 785202116Sbz * address to connect from. 786192895Sjamie */ 787192895Sjamie if (ip4s > 1) 788192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 789192895Sjamie /* 790192895Sjamie * Check for duplicate addresses and do some simple 791192895Sjamie * zero and broadcast checks. If users give other bogus 792192895Sjamie * addresses it is their problem. 793192895Sjamie * 794192895Sjamie * We do not have to care about byte order for these 795192895Sjamie * checks so we will do them in NBO. 796192895Sjamie */ 797192895Sjamie for (ii = 0; ii < ip4s; ii++) { 798192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 799192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 800192895Sjamie error = EINVAL; 801192895Sjamie goto done_free; 802192895Sjamie } 803192895Sjamie if ((ii+1) < ip4s && 804192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 805192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 806192895Sjamie error = EINVAL; 807192895Sjamie goto done_free; 808192895Sjamie } 809192895Sjamie } 810185435Sbz } 811191673Sjamie } 812191673Sjamie#endif 813185435Sbz 814185435Sbz#ifdef INET6 815191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 816191673Sjamie if (error == ENOENT) 817195870Sjamie ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1; 818191673Sjamie else if (error != 0) 819191673Sjamie goto done_free; 820191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 821191673Sjamie error = EINVAL; 822191673Sjamie goto done_free; 823192895Sjamie } else { 824195870Sjamie ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 825195870Sjamie if (ip6s == 0) 826195870Sjamie pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 827195870Sjamie else { 828195870Sjamie pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 829192895Sjamie ip6s /= sizeof(*ip6); 830192895Sjamie if (ip6s > jail_max_af_ips) { 831185435Sbz error = EINVAL; 832192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 833192895Sjamie goto done_errmsg; 834185435Sbz } 835195974Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 836192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 837192895Sjamie if (ip6s > 1) 838192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 839192895Sjamie for (ii = 0; ii < ip6s; ii++) { 840192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 841192895Sjamie error = EINVAL; 842192895Sjamie goto done_free; 843192895Sjamie } 844192895Sjamie if ((ii+1) < ip6s && 845192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 846192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 847192895Sjamie { 848192895Sjamie error = EINVAL; 849192895Sjamie goto done_free; 850192895Sjamie } 851192895Sjamie } 852185435Sbz } 853191673Sjamie } 854185435Sbz#endif 855185435Sbz 856195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 857195945Sjamie if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 858195945Sjamie error = EINVAL; 859195945Sjamie vfs_opterror(opts, 860195945Sjamie "vnet jails cannot have IP address restrictions"); 861195945Sjamie goto done_errmsg; 862195945Sjamie } 863195945Sjamie#endif 864195945Sjamie 865191673Sjamie root = NULL; 866191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 867191673Sjamie if (error == ENOENT) 868191673Sjamie path = NULL; 869191673Sjamie else if (error != 0) 870191673Sjamie goto done_free; 871191673Sjamie else { 872191673Sjamie if (flags & JAIL_UPDATE) { 873191673Sjamie error = EINVAL; 874191673Sjamie vfs_opterror(opts, 875191673Sjamie "path cannot be changed after creation"); 876191673Sjamie goto done_errmsg; 877191673Sjamie } 878191673Sjamie if (len == 0 || path[len - 1] != '\0') { 879191673Sjamie error = EINVAL; 880191673Sjamie goto done_free; 881191673Sjamie } 882191673Sjamie if (len < 2 || (len == 2 && path[0] == '/')) 883191673Sjamie path = NULL; 884191673Sjamie else { 885192895Sjamie /* Leave room for a real-root full pathname. */ 886192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 887192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 888192895Sjamie error = ENAMETOOLONG; 889192895Sjamie goto done_free; 890192895Sjamie } 891191673Sjamie NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW, UIO_SYSSPACE, 892191673Sjamie path, td); 893191673Sjamie error = namei(&nd); 894191673Sjamie if (error) 895191673Sjamie goto done_free; 896191673Sjamie vfslocked = NDHASGIANT(&nd); 897191673Sjamie root = nd.ni_vp; 898191673Sjamie NDFREE(&nd, NDF_ONLY_PNBUF); 899191673Sjamie if (root->v_type != VDIR) { 900191673Sjamie error = ENOTDIR; 901191673Sjamie vrele(root); 902191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 903191673Sjamie goto done_free; 904191673Sjamie } 905191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 906191673Sjamie } 907191673Sjamie } 908185435Sbz 909191673Sjamie /* 910191673Sjamie * Grab the allprison lock before letting modules check their 911191673Sjamie * parameters. Once we have it, do not let go so we'll have a 912191673Sjamie * consistent view of the OSD list. 913191673Sjamie */ 914191673Sjamie sx_xlock(&allprison_lock); 915191673Sjamie error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 916191673Sjamie if (error) 917191673Sjamie goto done_unlock_list; 918185435Sbz 919191673Sjamie /* By now, all parameters should have been noted. */ 920191673Sjamie TAILQ_FOREACH(opt, opts, link) { 921191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 922191673Sjamie error = EINVAL; 923191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 924191673Sjamie goto done_unlock_list; 925191673Sjamie } 926191673Sjamie } 927191673Sjamie 928185435Sbz /* 929191673Sjamie * See if we are creating a new record or updating an existing one. 930191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 931185435Sbz */ 932191673Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 933191673Sjamie if (!cuflags) { 934191673Sjamie error = EINVAL; 935191673Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 936191673Sjamie goto done_unlock_list; 937191673Sjamie } 938191673Sjamie pr = NULL; 939196835Sjamie namelc = NULL; 940196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 941196835Sjamie namelc = strrchr(name, '.'); 942196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 943196835Sjamie if (*p != '\0') 944196835Sjamie jid = 0; 945196835Sjamie } 946191673Sjamie if (jid != 0) { 947192895Sjamie /* 948192895Sjamie * See if a requested jid already exists. There is an 949192895Sjamie * information leak here if the jid exists but is not within 950192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 951192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 952192895Sjamie * will return ENOENT which is not normally a valid error. 953192895Sjamie */ 954191673Sjamie if (jid < 0) { 955191673Sjamie error = EINVAL; 956191673Sjamie vfs_opterror(opts, "negative jid"); 957191673Sjamie goto done_unlock_list; 958191673Sjamie } 959191673Sjamie pr = prison_find(jid); 960191673Sjamie if (pr != NULL) { 961192895Sjamie ppr = pr->pr_parent; 962191673Sjamie /* Create: jid must not exist. */ 963191673Sjamie if (cuflags == JAIL_CREATE) { 964191673Sjamie mtx_unlock(&pr->pr_mtx); 965191673Sjamie error = EEXIST; 966191673Sjamie vfs_opterror(opts, "jail %d already exists", 967191673Sjamie jid); 968191673Sjamie goto done_unlock_list; 969191673Sjamie } 970192895Sjamie if (!prison_ischild(mypr, pr)) { 971192895Sjamie mtx_unlock(&pr->pr_mtx); 972192895Sjamie pr = NULL; 973192895Sjamie } else if (pr->pr_uref == 0) { 974191673Sjamie if (!(flags & JAIL_DYING)) { 975191673Sjamie mtx_unlock(&pr->pr_mtx); 976191673Sjamie error = ENOENT; 977191673Sjamie vfs_opterror(opts, "jail %d is dying", 978191673Sjamie jid); 979191673Sjamie goto done_unlock_list; 980191673Sjamie } else if ((flags & JAIL_ATTACH) || 981191673Sjamie (pr_flags & PR_PERSIST)) { 982191673Sjamie /* 983191673Sjamie * A dying jail might be resurrected 984191673Sjamie * (via attach or persist), but first 985191673Sjamie * it must determine if another jail 986191673Sjamie * has claimed its name. Accomplish 987191673Sjamie * this by implicitly re-setting the 988191673Sjamie * name. 989191673Sjamie */ 990191673Sjamie if (name == NULL) 991192895Sjamie name = prison_name(mypr, pr); 992191673Sjamie } 993191673Sjamie } 994191673Sjamie } 995191673Sjamie if (pr == NULL) { 996191673Sjamie /* Update: jid must exist. */ 997191673Sjamie if (cuflags == JAIL_UPDATE) { 998191673Sjamie error = ENOENT; 999191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1000191673Sjamie goto done_unlock_list; 1001191673Sjamie } 1002191673Sjamie } 1003191673Sjamie } 1004191673Sjamie /* 1005191673Sjamie * If the caller provided a name, look for a jail by that name. 1006191673Sjamie * This has different semantics for creates and updates keyed by jid 1007191673Sjamie * (where the name must not already exist in a different jail), 1008191673Sjamie * and updates keyed by the name itself (where the name must exist 1009191673Sjamie * because that is the jail being updated). 1010191673Sjamie */ 1011191673Sjamie if (name != NULL) { 1012196835Sjamie namelc = strrchr(name, '.'); 1013196835Sjamie if (namelc == NULL) 1014196835Sjamie namelc = name; 1015196835Sjamie else { 1016192895Sjamie /* 1017192895Sjamie * This is a hierarchical name. Split it into the 1018192895Sjamie * parent and child names, and make sure the parent 1019192895Sjamie * exists or matches an already found jail. 1020192895Sjamie */ 1021196835Sjamie *namelc = '\0'; 1022192895Sjamie if (pr != NULL) { 1023196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1024196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1025192895Sjamie mtx_unlock(&pr->pr_mtx); 1026192895Sjamie error = EINVAL; 1027192895Sjamie vfs_opterror(opts, 1028192895Sjamie "cannot change jail's parent"); 1029192895Sjamie goto done_unlock_list; 1030192895Sjamie } 1031192895Sjamie } else { 1032192895Sjamie ppr = prison_find_name(mypr, name); 1033192895Sjamie if (ppr == NULL) { 1034192895Sjamie error = ENOENT; 1035192895Sjamie vfs_opterror(opts, 1036192895Sjamie "jail \"%s\" not found", name); 1037192895Sjamie goto done_unlock_list; 1038192895Sjamie } 1039192895Sjamie mtx_unlock(&ppr->pr_mtx); 1040192895Sjamie } 1041196835Sjamie name = ++namelc; 1042192895Sjamie } 1043191673Sjamie if (name[0] != '\0') { 1044192895Sjamie namelen = 1045192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1046192895Sjamie name_again: 1047191673Sjamie deadpr = NULL; 1048192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1049191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1050192895Sjamie !strcmp(tpr->pr_name + namelen, name)) { 1051191673Sjamie if (pr == NULL && 1052191673Sjamie cuflags != JAIL_CREATE) { 1053191673Sjamie mtx_lock(&tpr->pr_mtx); 1054191673Sjamie if (tpr->pr_ref > 0) { 1055191673Sjamie /* 1056191673Sjamie * Use this jail 1057191673Sjamie * for updates. 1058191673Sjamie */ 1059191673Sjamie if (tpr->pr_uref > 0) { 1060191673Sjamie pr = tpr; 1061191673Sjamie break; 1062191673Sjamie } 1063191673Sjamie deadpr = tpr; 1064191673Sjamie } 1065191673Sjamie mtx_unlock(&tpr->pr_mtx); 1066191673Sjamie } else if (tpr->pr_uref > 0) { 1067191673Sjamie /* 1068191673Sjamie * Create, or update(jid): 1069191673Sjamie * name must not exist in an 1070192895Sjamie * active sibling jail. 1071191673Sjamie */ 1072191673Sjamie error = EEXIST; 1073191673Sjamie if (pr != NULL) 1074191673Sjamie mtx_unlock(&pr->pr_mtx); 1075191673Sjamie vfs_opterror(opts, 1076191673Sjamie "jail \"%s\" already exists", 1077191673Sjamie name); 1078191673Sjamie goto done_unlock_list; 1079191673Sjamie } 1080191673Sjamie } 1081191673Sjamie } 1082191673Sjamie /* If no active jail is found, use a dying one. */ 1083191673Sjamie if (deadpr != NULL && pr == NULL) { 1084191673Sjamie if (flags & JAIL_DYING) { 1085191673Sjamie mtx_lock(&deadpr->pr_mtx); 1086191673Sjamie if (deadpr->pr_ref == 0) { 1087191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1088191673Sjamie goto name_again; 1089191673Sjamie } 1090191673Sjamie pr = deadpr; 1091191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1092191673Sjamie error = ENOENT; 1093191673Sjamie vfs_opterror(opts, 1094191673Sjamie "jail \"%s\" is dying", name); 1095191673Sjamie goto done_unlock_list; 1096191673Sjamie } 1097191673Sjamie } 1098191673Sjamie /* Update: name must exist if no jid. */ 1099191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1100191673Sjamie error = ENOENT; 1101191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1102191673Sjamie name); 1103191673Sjamie goto done_unlock_list; 1104191673Sjamie } 1105191673Sjamie } 1106191673Sjamie } 1107191673Sjamie /* Update: must provide a jid or name. */ 1108191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1109191673Sjamie error = ENOENT; 1110191673Sjamie vfs_opterror(opts, "update specified no jail"); 1111191673Sjamie goto done_unlock_list; 1112191673Sjamie } 1113185435Sbz 1114191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1115191673Sjamie if (pr == NULL) { 1116194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1117194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1118194762Sjamie error = EPERM; 1119194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1120194762Sjamie goto done_unlock_list; 1121194762Sjamie } 1122191673Sjamie created = 1; 1123192895Sjamie mtx_lock(&ppr->pr_mtx); 1124192895Sjamie if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1125192895Sjamie mtx_unlock(&ppr->pr_mtx); 1126192895Sjamie error = ENOENT; 1127192895Sjamie vfs_opterror(opts, "parent jail went away!"); 1128192895Sjamie goto done_unlock_list; 1129192895Sjamie } 1130192895Sjamie ppr->pr_ref++; 1131192895Sjamie ppr->pr_uref++; 1132192895Sjamie mtx_unlock(&ppr->pr_mtx); 1133191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1134191673Sjamie if (jid == 0) { 1135191673Sjamie /* Find the next free jid. */ 1136191673Sjamie jid = lastprid + 1; 1137191673Sjamie findnext: 1138191673Sjamie if (jid == JAIL_MAX) 1139191673Sjamie jid = 1; 1140191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1141191673Sjamie if (tpr->pr_id < jid) 1142191673Sjamie continue; 1143191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1144191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1145191673Sjamie break; 1146191673Sjamie } 1147191673Sjamie if (jid == lastprid) { 1148191673Sjamie error = EAGAIN; 1149191673Sjamie vfs_opterror(opts, 1150191673Sjamie "no available jail IDs"); 1151191673Sjamie free(pr, M_PRISON); 1152192895Sjamie prison_deref(ppr, PD_DEREF | 1153192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1154192895Sjamie goto done_releroot; 1155191673Sjamie } 1156191673Sjamie jid++; 1157191673Sjamie goto findnext; 1158191673Sjamie } 1159191673Sjamie lastprid = jid; 1160191673Sjamie } else { 1161191673Sjamie /* 1162191673Sjamie * The jail already has a jid (that did not yet exist), 1163191673Sjamie * so just find where to insert it. 1164191673Sjamie */ 1165191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1166191673Sjamie if (tpr->pr_id >= jid) { 1167191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1168191673Sjamie break; 1169191673Sjamie } 1170191673Sjamie } 1171191673Sjamie if (tpr == NULL) 1172191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1173192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1174192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1175194762Sjamie tpr->pr_childcount++; 1176185435Sbz 1177192895Sjamie pr->pr_parent = ppr; 1178191673Sjamie pr->pr_id = jid; 1179192895Sjamie 1180192895Sjamie /* Set some default values, and inherit some from the parent. */ 1181191673Sjamie if (name == NULL) 1182191673Sjamie name = ""; 1183191673Sjamie if (path == NULL) { 1184191673Sjamie path = "/"; 1185192895Sjamie root = mypr->pr_root; 1186191673Sjamie vref(root); 1187191673Sjamie } 1188195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1189195944Sjamie pr->pr_flags |= PR_HOST; 1190195945Sjamie#if defined(INET) || defined(INET6) 1191195945Sjamie#ifdef VIMAGE 1192195945Sjamie if (!(pr_flags & PR_VNET)) 1193195945Sjamie#endif 1194195945Sjamie { 1195192895Sjamie#ifdef INET 1196195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1197195974Sjamie pr->pr_flags |= 1198195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1199195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1200195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1201195974Sjamie if (ppr->pr_ip4 != NULL) { 1202195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1203195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1204195974Sjamie sizeof(struct in_addr), M_PRISON, 1205195974Sjamie M_WAITOK); 1206195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1207195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1208195974Sjamie } 1209195974Sjamie } 1210192895Sjamie#endif 1211192895Sjamie#ifdef INET6 1212195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1213195974Sjamie pr->pr_flags |= 1214195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1215195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1216195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1217195974Sjamie if (ppr->pr_ip6 != NULL) { 1218195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1219195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1220195974Sjamie sizeof(struct in6_addr), M_PRISON, 1221195974Sjamie M_WAITOK); 1222195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1223195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1224195974Sjamie } 1225195974Sjamie } 1226192895Sjamie#endif 1227195945Sjamie } 1228195945Sjamie#endif 1229202468Sbz /* Source address selection is always on by default. */ 1230202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1231202468Sbz 1232192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1233192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1234196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1235191673Sjamie 1236192895Sjamie LIST_INIT(&pr->pr_children); 1237192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1238191673Sjamie 1239194251Sjamie#ifdef VIMAGE 1240194251Sjamie /* Allocate a new vnet if specified. */ 1241194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1242194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1243194251Sjamie#endif 1244185435Sbz /* 1245191673Sjamie * Allocate a dedicated cpuset for each jail. 1246191673Sjamie * Unlike other initial settings, this may return an erorr. 1247185435Sbz */ 1248192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1249191673Sjamie if (error) { 1250191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1251191673Sjamie goto done_releroot; 1252191673Sjamie } 1253185435Sbz 1254191673Sjamie mtx_lock(&pr->pr_mtx); 1255185435Sbz /* 1256191673Sjamie * New prisons do not yet have a reference, because we do not 1257191673Sjamie * want other to see the incomplete prison once the 1258191673Sjamie * allprison_lock is downgraded. 1259185435Sbz */ 1260191673Sjamie } else { 1261191673Sjamie created = 0; 1262195974Sjamie /* 1263195974Sjamie * Grab a reference for existing prisons, to ensure they 1264195974Sjamie * continue to exist for the duration of the call. 1265195974Sjamie */ 1266195974Sjamie pr->pr_ref++; 1267195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1268195945Sjamie if ((pr->pr_flags & PR_VNET) && 1269195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1270195945Sjamie error = EINVAL; 1271195945Sjamie vfs_opterror(opts, 1272195945Sjamie "vnet jails cannot have IP address restrictions"); 1273195945Sjamie goto done_deref_locked; 1274195945Sjamie } 1275195945Sjamie#endif 1276195974Sjamie#ifdef INET 1277195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1278195974Sjamie error = EINVAL; 1279195974Sjamie vfs_opterror(opts, 1280195974Sjamie "ip4 cannot be changed after creation"); 1281195974Sjamie goto done_deref_locked; 1282195974Sjamie } 1283195974Sjamie#endif 1284195974Sjamie#ifdef INET6 1285195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1286195974Sjamie error = EINVAL; 1287195974Sjamie vfs_opterror(opts, 1288195974Sjamie "ip6 cannot be changed after creation"); 1289195974Sjamie goto done_deref_locked; 1290195974Sjamie } 1291195974Sjamie#endif 1292191673Sjamie } 1293185435Sbz 1294191673Sjamie /* Do final error checking before setting anything. */ 1295192895Sjamie if (gotslevel) { 1296192895Sjamie if (slevel < ppr->pr_securelevel) { 1297192895Sjamie error = EPERM; 1298192895Sjamie goto done_deref_locked; 1299192895Sjamie } 1300192895Sjamie } 1301194762Sjamie if (gotchildmax) { 1302194762Sjamie if (childmax >= ppr->pr_childmax) { 1303194762Sjamie error = EPERM; 1304194762Sjamie goto done_deref_locked; 1305194762Sjamie } 1306194762Sjamie } 1307192895Sjamie if (gotenforce) { 1308192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1309192895Sjamie error = EPERM; 1310192895Sjamie goto done_deref_locked; 1311192895Sjamie } 1312192895Sjamie } 1313185435Sbz#ifdef INET 1314195974Sjamie if (ip4s > 0) { 1315192895Sjamie if (ppr->pr_flags & PR_IP4) { 1316195974Sjamie /* 1317195974Sjamie * Make sure the new set of IP addresses is a 1318195974Sjamie * subset of the parent's list. Don't worry 1319195974Sjamie * about the parent being unlocked, as any 1320195974Sjamie * setting is done with allprison_lock held. 1321195974Sjamie */ 1322195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1323195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1324195974Sjamie break; 1325195974Sjamie if (ij == ppr->pr_ip4s) { 1326195974Sjamie error = EPERM; 1327195974Sjamie goto done_deref_locked; 1328195974Sjamie } 1329195974Sjamie if (ip4s > 1) { 1330195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1331195974Sjamie if (ip4[ii].s_addr == 1332195974Sjamie ppr->pr_ip4[0].s_addr) 1333195974Sjamie continue; 1334195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1335195974Sjamie if (ip4[ii].s_addr == 1336195974Sjamie ppr->pr_ip4[ij].s_addr) 1337195974Sjamie break; 1338195974Sjamie if (ij == ppr->pr_ip4s) 1339195974Sjamie break; 1340192895Sjamie } 1341192895Sjamie if (ij == ppr->pr_ip4s) { 1342192895Sjamie error = EPERM; 1343192895Sjamie goto done_deref_locked; 1344192895Sjamie } 1345192895Sjamie } 1346192895Sjamie } 1347195974Sjamie /* 1348195974Sjamie * Check for conflicting IP addresses. We permit them 1349195974Sjamie * if there is no more than one IP on each jail. If 1350195974Sjamie * there is a duplicate on a jail with more than one 1351195974Sjamie * IP stop checking and return error. 1352195974Sjamie */ 1353195974Sjamie tppr = ppr; 1354195945Sjamie#ifdef VIMAGE 1355195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1356195974Sjamie if (tppr->pr_flags & PR_VNET) 1357195974Sjamie break; 1358195945Sjamie#endif 1359195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1360195974Sjamie if (tpr == pr || 1361195945Sjamie#ifdef VIMAGE 1362195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1363195945Sjamie#endif 1364195974Sjamie tpr->pr_uref == 0) { 1365192895Sjamie descend = 0; 1366195974Sjamie continue; 1367195974Sjamie } 1368195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1369195974Sjamie continue; 1370195974Sjamie descend = 0; 1371195974Sjamie if (tpr->pr_ip4 == NULL || 1372195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1373195974Sjamie continue; 1374195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1375195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1376195974Sjamie error = EADDRINUSE; 1377195974Sjamie vfs_opterror(opts, 1378195974Sjamie "IPv4 addresses clash"); 1379195974Sjamie goto done_deref_locked; 1380192895Sjamie } 1381192895Sjamie } 1382192895Sjamie } 1383192895Sjamie } 1384185435Sbz#endif 1385191673Sjamie#ifdef INET6 1386195974Sjamie if (ip6s > 0) { 1387192895Sjamie if (ppr->pr_flags & PR_IP6) { 1388195974Sjamie /* 1389195974Sjamie * Make sure the new set of IP addresses is a 1390195974Sjamie * subset of the parent's list. 1391195974Sjamie */ 1392195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1393195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1394195974Sjamie &ppr->pr_ip6[ij])) 1395195974Sjamie break; 1396195974Sjamie if (ij == ppr->pr_ip6s) { 1397195974Sjamie error = EPERM; 1398195974Sjamie goto done_deref_locked; 1399195974Sjamie } 1400195974Sjamie if (ip6s > 1) { 1401195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1402195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1403195974Sjamie &ppr->pr_ip6[0])) 1404195974Sjamie continue; 1405195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1406195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1407195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1408195974Sjamie break; 1409195974Sjamie if (ij == ppr->pr_ip6s) 1410195974Sjamie break; 1411192895Sjamie } 1412192895Sjamie if (ij == ppr->pr_ip6s) { 1413192895Sjamie error = EPERM; 1414192895Sjamie goto done_deref_locked; 1415192895Sjamie } 1416192895Sjamie } 1417192895Sjamie } 1418195974Sjamie /* Check for conflicting IP addresses. */ 1419195974Sjamie tppr = ppr; 1420195945Sjamie#ifdef VIMAGE 1421195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1422195974Sjamie if (tppr->pr_flags & PR_VNET) 1423195974Sjamie break; 1424195945Sjamie#endif 1425195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1426195974Sjamie if (tpr == pr || 1427195945Sjamie#ifdef VIMAGE 1428195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1429195945Sjamie#endif 1430195974Sjamie tpr->pr_uref == 0) { 1431192895Sjamie descend = 0; 1432195974Sjamie continue; 1433195974Sjamie } 1434195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1435195974Sjamie continue; 1436195974Sjamie descend = 0; 1437195974Sjamie if (tpr->pr_ip6 == NULL || 1438195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1439195974Sjamie continue; 1440195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1441195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1442195974Sjamie error = EADDRINUSE; 1443195974Sjamie vfs_opterror(opts, 1444195974Sjamie "IPv6 addresses clash"); 1445195974Sjamie goto done_deref_locked; 1446192895Sjamie } 1447192895Sjamie } 1448191673Sjamie } 1449192895Sjamie } 1450191673Sjamie#endif 1451192895Sjamie onamelen = namelen = 0; 1452192895Sjamie if (name != NULL) { 1453191673Sjamie /* Give a default name of the jid. */ 1454191673Sjamie if (name[0] == '\0') 1455191673Sjamie snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1456196835Sjamie else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid && 1457196835Sjamie *p == '\0')) { 1458191673Sjamie error = EINVAL; 1459196835Sjamie vfs_opterror(opts, 1460196835Sjamie "name cannot be numeric (unless it is the jid)"); 1461192895Sjamie goto done_deref_locked; 1462191673Sjamie } 1463191673Sjamie /* 1464192895Sjamie * Make sure the name isn't too long for the prison or its 1465192895Sjamie * children. 1466191673Sjamie */ 1467192895Sjamie onamelen = strlen(pr->pr_name); 1468192895Sjamie namelen = strlen(name); 1469192895Sjamie if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1470192895Sjamie error = ENAMETOOLONG; 1471192895Sjamie goto done_deref_locked; 1472192895Sjamie } 1473192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1474192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1475192895Sjamie sizeof(pr->pr_name)) { 1476192895Sjamie error = ENAMETOOLONG; 1477192895Sjamie goto done_deref_locked; 1478192895Sjamie } 1479192895Sjamie } 1480191673Sjamie } 1481192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1482192895Sjamie error = EPERM; 1483192895Sjamie goto done_deref_locked; 1484192895Sjamie } 1485185435Sbz 1486191673Sjamie /* Set the parameters of the prison. */ 1487191673Sjamie#ifdef INET 1488192895Sjamie redo_ip4 = 0; 1489195974Sjamie if (pr_flags & PR_IP4_USER) { 1490195974Sjamie pr->pr_flags |= PR_IP4; 1491195974Sjamie free(pr->pr_ip4, M_PRISON); 1492195974Sjamie pr->pr_ip4s = ip4s; 1493195974Sjamie pr->pr_ip4 = ip4; 1494195974Sjamie ip4 = NULL; 1495192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1496195945Sjamie#ifdef VIMAGE 1497195945Sjamie if (tpr->pr_flags & PR_VNET) { 1498195945Sjamie descend = 0; 1499195945Sjamie continue; 1500195945Sjamie } 1501195945Sjamie#endif 1502192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1503192895Sjamie redo_ip4 = 1; 1504192895Sjamie descend = 0; 1505192895Sjamie } 1506192895Sjamie } 1507185435Sbz } 1508191673Sjamie#endif 1509191673Sjamie#ifdef INET6 1510192895Sjamie redo_ip6 = 0; 1511195974Sjamie if (pr_flags & PR_IP6_USER) { 1512195974Sjamie pr->pr_flags |= PR_IP6; 1513195974Sjamie free(pr->pr_ip6, M_PRISON); 1514195974Sjamie pr->pr_ip6s = ip6s; 1515195974Sjamie pr->pr_ip6 = ip6; 1516195974Sjamie ip6 = NULL; 1517192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1518195945Sjamie#ifdef VIMAGE 1519195945Sjamie if (tpr->pr_flags & PR_VNET) { 1520195945Sjamie descend = 0; 1521195945Sjamie continue; 1522195945Sjamie } 1523195945Sjamie#endif 1524192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1525192895Sjamie redo_ip6 = 1; 1526192895Sjamie descend = 0; 1527192895Sjamie } 1528192895Sjamie } 1529191673Sjamie } 1530191673Sjamie#endif 1531192895Sjamie if (gotslevel) { 1532191673Sjamie pr->pr_securelevel = slevel; 1533192895Sjamie /* Set all child jails to be at least this level. */ 1534192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1535192895Sjamie if (tpr->pr_securelevel < slevel) 1536192895Sjamie tpr->pr_securelevel = slevel; 1537192895Sjamie } 1538194762Sjamie if (gotchildmax) { 1539194762Sjamie pr->pr_childmax = childmax; 1540194762Sjamie /* Set all child jails to under this limit. */ 1541194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1542194762Sjamie if (tpr->pr_childmax > childmax - level) 1543194762Sjamie tpr->pr_childmax = childmax > level 1544194762Sjamie ? childmax - level : 0; 1545194762Sjamie } 1546192895Sjamie if (gotenforce) { 1547192895Sjamie pr->pr_enforce_statfs = enforce; 1548192895Sjamie /* Pass this restriction on to the children. */ 1549192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1550192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1551192895Sjamie tpr->pr_enforce_statfs = enforce; 1552192895Sjamie } 1553192895Sjamie if (name != NULL) { 1554192895Sjamie if (ppr == &prison0) 1555192895Sjamie strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1556192895Sjamie else 1557192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1558192895Sjamie ppr->pr_name, name); 1559192895Sjamie /* Change this component of child names. */ 1560192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1561192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1562192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1563192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1564192895Sjamie } 1565192895Sjamie } 1566191673Sjamie if (path != NULL) { 1567192895Sjamie /* Try to keep a real-rooted full pathname. */ 1568192895Sjamie if (path[0] == '/' && strcmp(mypr->pr_path, "/")) 1569192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1570192895Sjamie mypr->pr_path, path); 1571192895Sjamie else 1572192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1573191673Sjamie pr->pr_root = root; 1574191673Sjamie } 1575193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1576193066Sjamie if (pr->pr_flags & PR_HOST) { 1577193066Sjamie /* 1578193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1579193066Sjamie * the lack of a lock on the parent is not a problem; 1580193066Sjamie * it is always set with allprison_lock at least 1581193066Sjamie * shared, and is held exclusively here. 1582193066Sjamie */ 1583194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1584194118Sjamie sizeof(pr->pr_hostname)); 1585194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1586194118Sjamie sizeof(pr->pr_domainname)); 1587194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1588194118Sjamie sizeof(pr->pr_hostuuid)); 1589193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1590193066Sjamie } 1591193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1592193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1593193066Sjamie if (host != NULL) 1594194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1595193066Sjamie if (domain != NULL) 1596194118Sjamie strlcpy(pr->pr_domainname, domain, 1597194118Sjamie sizeof(pr->pr_domainname)); 1598193066Sjamie if (uuid != NULL) 1599194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1600193066Sjamie if (gothid) 1601193066Sjamie pr->pr_hostid = hid; 1602193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1603193066Sjamie if (tpr->pr_flags & PR_HOST) 1604193066Sjamie descend = 0; 1605193066Sjamie else { 1606193066Sjamie if (host != NULL) 1607194118Sjamie strlcpy(tpr->pr_hostname, 1608194118Sjamie pr->pr_hostname, 1609194118Sjamie sizeof(tpr->pr_hostname)); 1610193066Sjamie if (domain != NULL) 1611194118Sjamie strlcpy(tpr->pr_domainname, 1612194118Sjamie pr->pr_domainname, 1613194118Sjamie sizeof(tpr->pr_domainname)); 1614193066Sjamie if (uuid != NULL) 1615194118Sjamie strlcpy(tpr->pr_hostuuid, 1616194118Sjamie pr->pr_hostuuid, 1617194118Sjamie sizeof(tpr->pr_hostuuid)); 1618193066Sjamie if (gothid) 1619193066Sjamie tpr->pr_hostid = hid; 1620193066Sjamie } 1621193066Sjamie } 1622193066Sjamie } 1623192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1624192895Sjamie /* Clear allow bits in all children. */ 1625192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1626192895Sjamie tpr->pr_allow &= ~tallow; 1627192895Sjamie } 1628192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1629191673Sjamie /* 1630191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1631191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1632191673Sjamie * for now, so new ones will remain unseen until after the module 1633191673Sjamie * handlers have completed. 1634191673Sjamie */ 1635191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1636191673Sjamie if (pr_flags & PR_PERSIST) { 1637191673Sjamie pr->pr_ref++; 1638191673Sjamie pr->pr_uref++; 1639191673Sjamie } else { 1640191673Sjamie pr->pr_ref--; 1641191673Sjamie pr->pr_uref--; 1642191673Sjamie } 1643191673Sjamie } 1644191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1645191673Sjamie mtx_unlock(&pr->pr_mtx); 1646185435Sbz 1647192895Sjamie /* Locks may have prevented a complete restriction of child IP 1648192895Sjamie * addresses. If so, allocate some more memory and try again. 1649192895Sjamie */ 1650192895Sjamie#ifdef INET 1651192895Sjamie while (redo_ip4) { 1652192895Sjamie ip4s = pr->pr_ip4s; 1653192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1654192895Sjamie mtx_lock(&pr->pr_mtx); 1655192895Sjamie redo_ip4 = 0; 1656192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1657195945Sjamie#ifdef VIMAGE 1658195945Sjamie if (tpr->pr_flags & PR_VNET) { 1659195945Sjamie descend = 0; 1660195945Sjamie continue; 1661195945Sjamie } 1662195945Sjamie#endif 1663192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1664192895Sjamie if (ip4 != NULL) 1665192895Sjamie ip4 = NULL; 1666192895Sjamie else 1667192895Sjamie redo_ip4 = 1; 1668192895Sjamie } 1669192895Sjamie } 1670192895Sjamie mtx_unlock(&pr->pr_mtx); 1671192895Sjamie } 1672192895Sjamie#endif 1673192895Sjamie#ifdef INET6 1674192895Sjamie while (redo_ip6) { 1675192895Sjamie ip6s = pr->pr_ip6s; 1676192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1677192895Sjamie mtx_lock(&pr->pr_mtx); 1678192895Sjamie redo_ip6 = 0; 1679192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1680195945Sjamie#ifdef VIMAGE 1681195945Sjamie if (tpr->pr_flags & PR_VNET) { 1682195945Sjamie descend = 0; 1683195945Sjamie continue; 1684195945Sjamie } 1685195945Sjamie#endif 1686192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1687192895Sjamie if (ip6 != NULL) 1688192895Sjamie ip6 = NULL; 1689192895Sjamie else 1690192895Sjamie redo_ip6 = 1; 1691192895Sjamie } 1692192895Sjamie } 1693192895Sjamie mtx_unlock(&pr->pr_mtx); 1694192895Sjamie } 1695192895Sjamie#endif 1696192895Sjamie 1697191673Sjamie /* Let the modules do their work. */ 1698191673Sjamie sx_downgrade(&allprison_lock); 1699191673Sjamie if (created) { 1700191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1701191673Sjamie if (error) { 1702191673Sjamie prison_deref(pr, PD_LIST_SLOCKED); 1703191673Sjamie goto done_errmsg; 1704191673Sjamie } 1705191673Sjamie } 1706191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1707191673Sjamie if (error) { 1708191673Sjamie prison_deref(pr, created 1709191673Sjamie ? PD_LIST_SLOCKED 1710191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1711191673Sjamie goto done_errmsg; 1712191673Sjamie } 1713191673Sjamie 1714191673Sjamie /* Attach this process to the prison if requested. */ 1715191673Sjamie if (flags & JAIL_ATTACH) { 1716191673Sjamie mtx_lock(&pr->pr_mtx); 1717191673Sjamie error = do_jail_attach(td, pr); 1718191673Sjamie if (error) { 1719191673Sjamie vfs_opterror(opts, "attach failed"); 1720191673Sjamie if (!created) 1721191673Sjamie prison_deref(pr, PD_DEREF); 1722191673Sjamie goto done_errmsg; 1723191673Sjamie } 1724191673Sjamie } 1725191673Sjamie 1726191673Sjamie /* 1727191673Sjamie * Now that it is all there, drop the temporary reference from existing 1728191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1729191673Sjamie * (which was not done earlier so that the prison would not be publicly 1730191673Sjamie * visible). 1731191673Sjamie */ 1732191673Sjamie if (!created) { 1733191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1734191673Sjamie ? PD_DEREF 1735191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1736191673Sjamie } else { 1737191673Sjamie if (pr_flags & PR_PERSIST) { 1738191673Sjamie mtx_lock(&pr->pr_mtx); 1739191673Sjamie pr->pr_ref++; 1740191673Sjamie pr->pr_uref++; 1741191673Sjamie mtx_unlock(&pr->pr_mtx); 1742191673Sjamie } 1743191673Sjamie if (!(flags & JAIL_ATTACH)) 1744191673Sjamie sx_sunlock(&allprison_lock); 1745191673Sjamie } 1746191673Sjamie td->td_retval[0] = pr->pr_id; 1747191673Sjamie goto done_errmsg; 1748191673Sjamie 1749192895Sjamie done_deref_locked: 1750192895Sjamie prison_deref(pr, created 1751192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1752192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1753192895Sjamie goto done_releroot; 1754191673Sjamie done_unlock_list: 1755191673Sjamie sx_xunlock(&allprison_lock); 1756191673Sjamie done_releroot: 1757191673Sjamie if (root != NULL) { 1758191673Sjamie vfslocked = VFS_LOCK_GIANT(root->v_mount); 1759191673Sjamie vrele(root); 1760191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 1761191673Sjamie } 1762191673Sjamie done_errmsg: 1763191673Sjamie if (error) { 1764191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1765191673Sjamie if (errmsg_len > 0) { 1766191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1767191673Sjamie if (errmsg_pos > 0) { 1768191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1769191673Sjamie bcopy(errmsg, 1770191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1771191673Sjamie errmsg_len); 1772191673Sjamie else 1773191673Sjamie copyout(errmsg, 1774191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1775191673Sjamie errmsg_len); 1776191673Sjamie } 1777191673Sjamie } 1778191673Sjamie } 1779191673Sjamie done_free: 1780191673Sjamie#ifdef INET 1781191673Sjamie free(ip4, M_PRISON); 1782191673Sjamie#endif 1783191673Sjamie#ifdef INET6 1784191673Sjamie free(ip6, M_PRISON); 1785191673Sjamie#endif 1786191673Sjamie vfs_freeopts(opts); 1787191673Sjamie return (error); 1788191673Sjamie} 1789191673Sjamie 1790191673Sjamie 179182710Sdillon/* 1792191673Sjamie * struct jail_get_args { 1793191673Sjamie * struct iovec *iovp; 1794191673Sjamie * unsigned int iovcnt; 1795191673Sjamie * int flags; 1796114168Smike * }; 179782710Sdillon */ 179846155Sphkint 1799191673Sjamiejail_get(struct thread *td, struct jail_get_args *uap) 180046155Sphk{ 1801191673Sjamie struct uio *auio; 1802185435Sbz int error; 1803185435Sbz 1804191673Sjamie /* Check that we have an even number of iovecs. */ 1805191673Sjamie if (uap->iovcnt & 1) 1806191673Sjamie return (EINVAL); 1807191673Sjamie 1808191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1809185435Sbz if (error) 1810185435Sbz return (error); 1811191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1812191673Sjamie if (error == 0) 1813191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1814191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1815191673Sjamie free(auio, M_IOV); 1816191673Sjamie return (error); 1817191673Sjamie} 1818185435Sbz 1819191673Sjamieint 1820191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 1821191673Sjamie{ 1822192895Sjamie struct prison *pr, *mypr; 1823191673Sjamie struct vfsopt *opt; 1824191673Sjamie struct vfsoptlist *opts; 1825191673Sjamie char *errmsg, *name; 1826192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1827185435Sbz 1828191673Sjamie if (flags & ~JAIL_GET_MASK) 1829191673Sjamie return (EINVAL); 1830185435Sbz 1831191673Sjamie /* Get the parameter list. */ 1832191673Sjamie error = vfs_buildopts(optuio, &opts); 1833191673Sjamie if (error) 1834191673Sjamie return (error); 1835191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1836192895Sjamie mypr = td->td_ucred->cr_prison; 1837185435Sbz 1838191673Sjamie /* 1839191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 1840191673Sjamie */ 1841191673Sjamie sx_slock(&allprison_lock); 1842191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1843191673Sjamie if (error == 0) { 1844191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 1845192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1846191673Sjamie mtx_lock(&pr->pr_mtx); 1847191673Sjamie if (pr->pr_ref > 0 && 1848191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1849191673Sjamie break; 1850191673Sjamie mtx_unlock(&pr->pr_mtx); 1851191673Sjamie } 1852191673Sjamie } 1853191673Sjamie if (pr != NULL) 1854191673Sjamie goto found_prison; 1855191673Sjamie error = ENOENT; 1856191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 1857191673Sjamie goto done_unlock_list; 1858191673Sjamie } else if (error != ENOENT) 1859191673Sjamie goto done_unlock_list; 1860185435Sbz 1861191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1862191673Sjamie if (error == 0) { 1863191673Sjamie if (jid != 0) { 1864192895Sjamie pr = prison_find_child(mypr, jid); 1865191673Sjamie if (pr != NULL) { 1866191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1867191673Sjamie mtx_unlock(&pr->pr_mtx); 1868191673Sjamie error = ENOENT; 1869191673Sjamie vfs_opterror(opts, "jail %d is dying", 1870191673Sjamie jid); 1871191673Sjamie goto done_unlock_list; 1872191673Sjamie } 1873191673Sjamie goto found_prison; 1874191673Sjamie } 1875191673Sjamie error = ENOENT; 1876191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1877191673Sjamie goto done_unlock_list; 1878191673Sjamie } 1879191673Sjamie } else if (error != ENOENT) 1880191673Sjamie goto done_unlock_list; 188146155Sphk 1882191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 1883191673Sjamie if (error == 0) { 1884191673Sjamie if (len == 0 || name[len - 1] != '\0') { 1885191673Sjamie error = EINVAL; 1886191673Sjamie goto done_unlock_list; 1887191673Sjamie } 1888192895Sjamie pr = prison_find_name(mypr, name); 1889191673Sjamie if (pr != NULL) { 1890191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1891191673Sjamie mtx_unlock(&pr->pr_mtx); 1892191673Sjamie error = ENOENT; 1893191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 1894191673Sjamie name); 1895191673Sjamie goto done_unlock_list; 1896191673Sjamie } 1897191673Sjamie goto found_prison; 1898191673Sjamie } 1899191673Sjamie error = ENOENT; 1900191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 1901191673Sjamie goto done_unlock_list; 1902191673Sjamie } else if (error != ENOENT) 1903191673Sjamie goto done_unlock_list; 1904185435Sbz 1905191673Sjamie vfs_opterror(opts, "no jail specified"); 1906191673Sjamie error = ENOENT; 1907191673Sjamie goto done_unlock_list; 1908191673Sjamie 1909191673Sjamie found_prison: 1910191673Sjamie /* Get the parameters of the prison. */ 1911191673Sjamie pr->pr_ref++; 1912191673Sjamie locked = PD_LOCKED; 1913191673Sjamie td->td_retval[0] = pr->pr_id; 1914191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 1915191673Sjamie if (error != 0 && error != ENOENT) 1916191673Sjamie goto done_deref; 1917192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 1918192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 1919191673Sjamie if (error != 0 && error != ENOENT) 1920191673Sjamie goto done_deref; 1921192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 1922192895Sjamie if (error != 0 && error != ENOENT) 1923192895Sjamie goto done_deref; 1924192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 1925191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 1926191673Sjamie if (error != 0 && error != ENOENT) 1927191673Sjamie goto done_deref; 1928192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 1929191673Sjamie if (error != 0 && error != ENOENT) 1930191673Sjamie goto done_deref; 1931191673Sjamie#ifdef INET 1932191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 1933191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1934191673Sjamie if (error != 0 && error != ENOENT) 1935191673Sjamie goto done_deref; 1936191673Sjamie#endif 1937191673Sjamie#ifdef INET6 1938191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 1939191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1940191673Sjamie if (error != 0 && error != ENOENT) 1941191673Sjamie goto done_deref; 1942191673Sjamie#endif 1943191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 1944191673Sjamie sizeof(pr->pr_securelevel)); 1945191673Sjamie if (error != 0 && error != ENOENT) 1946191673Sjamie goto done_deref; 1947194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 1948194762Sjamie sizeof(pr->pr_childcount)); 1949194762Sjamie if (error != 0 && error != ENOENT) 1950194762Sjamie goto done_deref; 1951194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 1952194762Sjamie sizeof(pr->pr_childmax)); 1953194762Sjamie if (error != 0 && error != ENOENT) 1954194762Sjamie goto done_deref; 1955194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 1956191673Sjamie if (error != 0 && error != ENOENT) 1957191673Sjamie goto done_deref; 1958194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 1959193066Sjamie if (error != 0 && error != ENOENT) 1960193066Sjamie goto done_deref; 1961194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 1962193066Sjamie if (error != 0 && error != ENOENT) 1963193066Sjamie goto done_deref; 1964193066Sjamie#ifdef COMPAT_IA32 1965193066Sjamie if (td->td_proc->p_sysent->sv_flags & SV_IA32) { 1966193066Sjamie uint32_t hid32 = pr->pr_hostid; 1967193066Sjamie 1968193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 1969193066Sjamie } else 1970193066Sjamie#endif 1971193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 1972193066Sjamie sizeof(pr->pr_hostid)); 1973193066Sjamie if (error != 0 && error != ENOENT) 1974193066Sjamie goto done_deref; 1975192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 1976192895Sjamie sizeof(pr->pr_enforce_statfs)); 1977191673Sjamie if (error != 0 && error != ENOENT) 1978191673Sjamie goto done_deref; 1979192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 1980192895Sjamie fi++) { 1981192895Sjamie if (pr_flag_names[fi] == NULL) 1982192895Sjamie continue; 1983192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 1984192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 1985192895Sjamie if (error != 0 && error != ENOENT) 1986192895Sjamie goto done_deref; 1987192895Sjamie i = !i; 1988192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 1989192895Sjamie if (error != 0 && error != ENOENT) 1990192895Sjamie goto done_deref; 1991192895Sjamie } 1992195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 1993195870Sjamie fi++) { 1994195870Sjamie i = pr->pr_flags & 1995195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 1996195870Sjamie i = pr_flag_jailsys[fi].disable && 1997195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 1998195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 1999195870Sjamie : JAIL_SYS_INHERIT; 2000195870Sjamie error = 2001195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2002195870Sjamie if (error != 0 && error != ENOENT) 2003195870Sjamie goto done_deref; 2004195870Sjamie } 2005192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2006192895Sjamie fi++) { 2007192895Sjamie if (pr_allow_names[fi] == NULL) 2008192895Sjamie continue; 2009192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2010192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2011192895Sjamie if (error != 0 && error != ENOENT) 2012192895Sjamie goto done_deref; 2013192895Sjamie i = !i; 2014192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2015192895Sjamie if (error != 0 && error != ENOENT) 2016192895Sjamie goto done_deref; 2017192895Sjamie } 2018191673Sjamie i = (pr->pr_uref == 0); 2019191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2020191673Sjamie if (error != 0 && error != ENOENT) 2021191673Sjamie goto done_deref; 2022191673Sjamie i = !i; 2023191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2024191673Sjamie if (error != 0 && error != ENOENT) 2025191673Sjamie goto done_deref; 2026191673Sjamie 2027191673Sjamie /* Get the module parameters. */ 2028191673Sjamie mtx_unlock(&pr->pr_mtx); 2029191673Sjamie locked = 0; 2030191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 203146155Sphk if (error) 2032191673Sjamie goto done_deref; 2033191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 203484828Sjhb 2035191673Sjamie /* By now, all parameters should have been noted. */ 2036191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2037191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2038191673Sjamie error = EINVAL; 2039191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2040191673Sjamie goto done_errmsg; 2041191673Sjamie } 2042185435Sbz } 2043191673Sjamie 2044191673Sjamie /* Write the fetched parameters back to userspace. */ 2045191673Sjamie error = 0; 2046191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2047191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2048191673Sjamie pos = 2 * opt->pos + 1; 2049191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2050191673Sjamie if (opt->value != NULL) { 2051191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2052191673Sjamie bcopy(opt->value, 2053191673Sjamie optuio->uio_iov[pos].iov_base, 2054191673Sjamie opt->len); 2055191673Sjamie } else { 2056191673Sjamie error = copyout(opt->value, 2057191673Sjamie optuio->uio_iov[pos].iov_base, 2058191673Sjamie opt->len); 2059191673Sjamie if (error) 2060191673Sjamie break; 2061191673Sjamie } 2062191673Sjamie } 2063191673Sjamie } 2064185435Sbz } 2065191673Sjamie goto done_errmsg; 2066191673Sjamie 2067191673Sjamie done_deref: 2068191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2069191673Sjamie goto done_errmsg; 2070191673Sjamie 2071191673Sjamie done_unlock_list: 2072191673Sjamie sx_sunlock(&allprison_lock); 2073191673Sjamie done_errmsg: 2074191673Sjamie if (error && errmsg_pos >= 0) { 2075191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2076191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2077191673Sjamie if (errmsg_len > 0) { 2078191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2079191673Sjamie bcopy(errmsg, 2080191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2081191673Sjamie errmsg_len); 2082191673Sjamie else 2083191673Sjamie copyout(errmsg, 2084191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2085191673Sjamie errmsg_len); 2086191673Sjamie } 2087185435Sbz } 2088191673Sjamie vfs_freeopts(opts); 2089191673Sjamie return (error); 2090191673Sjamie} 2091113275Smike 2092192895Sjamie 2093191673Sjamie/* 2094191673Sjamie * struct jail_remove_args { 2095191673Sjamie * int jid; 2096191673Sjamie * }; 2097191673Sjamie */ 2098191673Sjamieint 2099191673Sjamiejail_remove(struct thread *td, struct jail_remove_args *uap) 2100191673Sjamie{ 2101192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2102192895Sjamie int descend, error; 2103185435Sbz 2104191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2105185435Sbz if (error) 2106191673Sjamie return (error); 2107185435Sbz 2108185435Sbz sx_xlock(&allprison_lock); 2109192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2110191673Sjamie if (pr == NULL) { 2111185435Sbz sx_xunlock(&allprison_lock); 2112191673Sjamie return (EINVAL); 2113185435Sbz } 2114185435Sbz 2115192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2116192895Sjamie pr->pr_ref++; 2117192895Sjamie pr->pr_flags |= PR_REMOVE; 2118192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2119192895Sjamie mtx_unlock(&pr->pr_mtx); 2120192895Sjamie lpr = NULL; 2121192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2122192895Sjamie mtx_lock(&cpr->pr_mtx); 2123192895Sjamie if (cpr->pr_ref > 0) { 2124192895Sjamie tpr = cpr; 2125192895Sjamie cpr->pr_ref++; 2126192895Sjamie cpr->pr_flags |= PR_REMOVE; 2127192895Sjamie } else { 2128192895Sjamie /* Already removed - do not do it again. */ 2129192895Sjamie tpr = NULL; 2130192895Sjamie } 2131192895Sjamie mtx_unlock(&cpr->pr_mtx); 2132192895Sjamie if (lpr != NULL) { 2133192895Sjamie mtx_lock(&lpr->pr_mtx); 2134192895Sjamie prison_remove_one(lpr); 2135192895Sjamie sx_xlock(&allprison_lock); 2136192895Sjamie } 2137192895Sjamie lpr = tpr; 2138192895Sjamie } 2139192895Sjamie if (lpr != NULL) { 2140192895Sjamie mtx_lock(&lpr->pr_mtx); 2141192895Sjamie prison_remove_one(lpr); 2142192895Sjamie sx_xlock(&allprison_lock); 2143192895Sjamie } 2144192895Sjamie mtx_lock(&pr->pr_mtx); 2145192895Sjamie } 2146192895Sjamie prison_remove_one(pr); 2147192895Sjamie return (0); 2148192895Sjamie} 2149192895Sjamie 2150192895Sjamiestatic void 2151192895Sjamieprison_remove_one(struct prison *pr) 2152192895Sjamie{ 2153192895Sjamie struct proc *p; 2154192895Sjamie int deuref; 2155192895Sjamie 2156191673Sjamie /* If the prison was persistent, it is not anymore. */ 2157191673Sjamie deuref = 0; 2158191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2159191673Sjamie pr->pr_ref--; 2160191673Sjamie deuref = PD_DEUREF; 2161191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2162179881Sdelphij } 2163113275Smike 2164192895Sjamie /* 2165192895Sjamie * jail_remove added a reference. If that's the only one, remove 2166192895Sjamie * the prison now. 2167192895Sjamie */ 2168192895Sjamie KASSERT(pr->pr_ref > 0, 2169192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2170192895Sjamie if (pr->pr_ref == 1) { 2171191673Sjamie prison_deref(pr, 2172191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2173192895Sjamie return; 2174191673Sjamie } 2175191673Sjamie 2176113275Smike mtx_unlock(&pr->pr_mtx); 2177191673Sjamie sx_xunlock(&allprison_lock); 2178191673Sjamie /* 2179191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2180191673Sjamie */ 2181191673Sjamie sx_slock(&allproc_lock); 2182191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2183191673Sjamie PROC_LOCK(p); 2184191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2185191673Sjamie p->p_ucred->cr_prison == pr) 2186191673Sjamie psignal(p, SIGKILL); 2187191673Sjamie PROC_UNLOCK(p); 2188191673Sjamie } 2189191673Sjamie sx_sunlock(&allproc_lock); 2190192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2191191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2192113275Smike} 2193113275Smike 2194190466Sjamie 2195113275Smike/* 2196114168Smike * struct jail_attach_args { 2197114168Smike * int jid; 2198114168Smike * }; 2199113275Smike */ 2200113275Smikeint 2201114168Smikejail_attach(struct thread *td, struct jail_attach_args *uap) 2202113275Smike{ 2203113275Smike struct prison *pr; 2204191673Sjamie int error; 2205167309Spjd 2206164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2207126023Snectar if (error) 2208126023Snectar return (error); 2209126023Snectar 2210168401Spjd sx_slock(&allprison_lock); 2211192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2212113275Smike if (pr == NULL) { 2213168401Spjd sx_sunlock(&allprison_lock); 2214113275Smike return (EINVAL); 2215113275Smike } 2216185435Sbz 2217185435Sbz /* 2218185435Sbz * Do not allow a process to attach to a prison that is not 2219191673Sjamie * considered to be "alive". 2220185435Sbz */ 2221191673Sjamie if (pr->pr_uref == 0) { 2222185435Sbz mtx_unlock(&pr->pr_mtx); 2223185435Sbz sx_sunlock(&allprison_lock); 2224185435Sbz return (EINVAL); 2225185435Sbz } 2226191673Sjamie 2227191673Sjamie return (do_jail_attach(td, pr)); 2228191673Sjamie} 2229191673Sjamie 2230191673Sjamiestatic int 2231191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2232191673Sjamie{ 2233192895Sjamie struct prison *ppr; 2234191673Sjamie struct proc *p; 2235191673Sjamie struct ucred *newcred, *oldcred; 2236191673Sjamie int vfslocked, error; 2237191673Sjamie 2238191673Sjamie /* 2239191673Sjamie * XXX: Note that there is a slight race here if two threads 2240191673Sjamie * in the same privileged process attempt to attach to two 2241191673Sjamie * different jails at the same time. It is important for 2242191673Sjamie * user processes not to do this, or they might end up with 2243191673Sjamie * a process root from one prison, but attached to the jail 2244191673Sjamie * of another. 2245191673Sjamie */ 2246113275Smike pr->pr_ref++; 2247191673Sjamie pr->pr_uref++; 2248113275Smike mtx_unlock(&pr->pr_mtx); 2249191673Sjamie 2250191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2251191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2252191673Sjamie if (error) { 2253191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2254191673Sjamie return (error); 2255191673Sjamie } 2256168401Spjd sx_sunlock(&allprison_lock); 2257113275Smike 2258185435Sbz /* 2259185435Sbz * Reparent the newly attached process to this jail. 2260185435Sbz */ 2261192895Sjamie ppr = td->td_ucred->cr_prison; 2262191673Sjamie p = td->td_proc; 2263185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2264185435Sbz if (error) 2265191673Sjamie goto e_revert_osd; 2266185435Sbz 2267150652Scsjp vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2268175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2269113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2270113275Smike goto e_unlock; 2271113275Smike#ifdef MAC 2272172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2273113275Smike goto e_unlock; 2274113275Smike#endif 2275175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2276191673Sjamie if ((error = change_root(pr->pr_root, td))) 2277191673Sjamie goto e_unlock_giant; 2278150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2279113275Smike 228084828Sjhb newcred = crget(); 228184828Sjhb PROC_LOCK(p); 228284828Sjhb oldcred = p->p_ucred; 2283113275Smike setsugid(p); 228484828Sjhb crcopy(newcred, oldcred); 2285113630Sjhb newcred->cr_prison = pr; 228684828Sjhb p->p_ucred = newcred; 228784828Sjhb PROC_UNLOCK(p); 228884828Sjhb crfree(oldcred); 2289192895Sjamie prison_deref(ppr, PD_DEREF | PD_DEUREF); 229046155Sphk return (0); 2291191673Sjamie e_unlock: 2292175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2293191673Sjamie e_unlock_giant: 2294150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2295191673Sjamie e_revert_osd: 2296191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2297192895Sjamie (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2298191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 229946155Sphk return (error); 230046155Sphk} 230146155Sphk 2302192895Sjamie 2303113275Smike/* 2304113275Smike * Returns a locked prison instance, or NULL on failure. 2305113275Smike */ 2306168399Spjdstruct prison * 2307113275Smikeprison_find(int prid) 2308113275Smike{ 2309113275Smike struct prison *pr; 2310113275Smike 2311168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2312191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2313113275Smike if (pr->pr_id == prid) { 2314113275Smike mtx_lock(&pr->pr_mtx); 2315191673Sjamie if (pr->pr_ref > 0) 2316191673Sjamie return (pr); 2317191673Sjamie mtx_unlock(&pr->pr_mtx); 2318113275Smike } 2319113275Smike } 2320113275Smike return (NULL); 2321113275Smike} 2322113275Smike 2323191673Sjamie/* 2324192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2325191673Sjamie */ 2326191673Sjamiestruct prison * 2327192895Sjamieprison_find_child(struct prison *mypr, int prid) 2328191673Sjamie{ 2329192895Sjamie struct prison *pr; 2330192895Sjamie int descend; 2331192895Sjamie 2332192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2333192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2334192895Sjamie if (pr->pr_id == prid) { 2335192895Sjamie mtx_lock(&pr->pr_mtx); 2336192895Sjamie if (pr->pr_ref > 0) 2337192895Sjamie return (pr); 2338192895Sjamie mtx_unlock(&pr->pr_mtx); 2339192895Sjamie } 2340192895Sjamie } 2341192895Sjamie return (NULL); 2342192895Sjamie} 2343192895Sjamie 2344192895Sjamie/* 2345192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2346192895Sjamie */ 2347192895Sjamiestruct prison * 2348192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2349192895Sjamie{ 2350191673Sjamie struct prison *pr, *deadpr; 2351192895Sjamie size_t mylen; 2352192895Sjamie int descend; 2353191673Sjamie 2354191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2355192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2356191673Sjamie again: 2357191673Sjamie deadpr = NULL; 2358192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2359192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2360191673Sjamie mtx_lock(&pr->pr_mtx); 2361191673Sjamie if (pr->pr_ref > 0) { 2362191673Sjamie if (pr->pr_uref > 0) 2363191673Sjamie return (pr); 2364191673Sjamie deadpr = pr; 2365191673Sjamie } 2366191673Sjamie mtx_unlock(&pr->pr_mtx); 2367191673Sjamie } 2368191673Sjamie } 2369192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2370191673Sjamie if (deadpr != NULL) { 2371191673Sjamie mtx_lock(&deadpr->pr_mtx); 2372191673Sjamie if (deadpr->pr_ref == 0) { 2373191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2374191673Sjamie goto again; 2375191673Sjamie } 2376191673Sjamie } 2377191673Sjamie return (deadpr); 2378191673Sjamie} 2379191673Sjamie 2380191673Sjamie/* 2381192895Sjamie * See if a prison has the specific flag set. 2382192895Sjamie */ 2383192895Sjamieint 2384192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2385192895Sjamie{ 2386192895Sjamie 2387192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2388192895Sjamie return (cred->cr_prison->pr_flags & flag); 2389192895Sjamie} 2390192895Sjamie 2391192895Sjamieint 2392192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2393192895Sjamie{ 2394192895Sjamie 2395192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2396192895Sjamie return (cred->cr_prison->pr_allow & flag); 2397192895Sjamie} 2398192895Sjamie 2399192895Sjamie/* 2400191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2401191673Sjamie * prison itself - but not in this context in case there are locks held. 2402191673Sjamie */ 240372786Srwatsonvoid 2404185029Spjdprison_free_locked(struct prison *pr) 240572786Srwatson{ 240672786Srwatson 2407185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 240872786Srwatson pr->pr_ref--; 240972786Srwatson if (pr->pr_ref == 0) { 2410168483Spjd mtx_unlock(&pr->pr_mtx); 2411124882Srwatson TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2412144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 241387275Srwatson return; 241472786Srwatson } 241587275Srwatson mtx_unlock(&pr->pr_mtx); 241672786Srwatson} 241772786Srwatson 2418185029Spjdvoid 2419185029Spjdprison_free(struct prison *pr) 2420185029Spjd{ 2421185029Spjd 2422185029Spjd mtx_lock(&pr->pr_mtx); 2423185029Spjd prison_free_locked(pr); 2424185029Spjd} 2425185029Spjd 2426124882Srwatsonstatic void 2427124882Srwatsonprison_complete(void *context, int pending) 2428124882Srwatson{ 2429191673Sjamie 2430191673Sjamie prison_deref((struct prison *)context, 0); 2431191673Sjamie} 2432191673Sjamie 2433191673Sjamie/* 2434191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2435191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2436191673Sjamie * references, release and delist the prison. On completion, the prison lock 2437191673Sjamie * and the allprison lock are both unlocked. 2438191673Sjamie */ 2439191673Sjamiestatic void 2440191673Sjamieprison_deref(struct prison *pr, int flags) 2441191673Sjamie{ 2442192895Sjamie struct prison *ppr, *tpr; 2443150652Scsjp int vfslocked; 2444124882Srwatson 2445191673Sjamie if (!(flags & PD_LOCKED)) 2446191673Sjamie mtx_lock(&pr->pr_mtx); 2447192895Sjamie /* Decrement the user references in a separate loop. */ 2448191673Sjamie if (flags & PD_DEUREF) { 2449192895Sjamie for (tpr = pr;; tpr = tpr->pr_parent) { 2450192895Sjamie if (tpr != pr) 2451192895Sjamie mtx_lock(&tpr->pr_mtx); 2452192895Sjamie if (--tpr->pr_uref > 0) 2453192895Sjamie break; 2454192895Sjamie KASSERT(tpr != &prison0, ("prison0 pr_uref=0")); 2455192895Sjamie mtx_unlock(&tpr->pr_mtx); 2456192895Sjamie } 2457191673Sjamie /* Done if there were only user references to remove. */ 2458191673Sjamie if (!(flags & PD_DEREF)) { 2459192895Sjamie mtx_unlock(&tpr->pr_mtx); 2460191673Sjamie if (flags & PD_LIST_SLOCKED) 2461191673Sjamie sx_sunlock(&allprison_lock); 2462191673Sjamie else if (flags & PD_LIST_XLOCKED) 2463191673Sjamie sx_xunlock(&allprison_lock); 2464191673Sjamie return; 2465191673Sjamie } 2466192895Sjamie if (tpr != pr) { 2467192895Sjamie mtx_unlock(&tpr->pr_mtx); 2468192895Sjamie mtx_lock(&pr->pr_mtx); 2469192895Sjamie } 2470191673Sjamie } 2471124882Srwatson 2472192895Sjamie for (;;) { 2473192895Sjamie if (flags & PD_DEREF) 2474192895Sjamie pr->pr_ref--; 2475192895Sjamie /* If the prison still has references, nothing else to do. */ 2476192895Sjamie if (pr->pr_ref > 0) { 2477192895Sjamie mtx_unlock(&pr->pr_mtx); 2478192895Sjamie if (flags & PD_LIST_SLOCKED) 2479192895Sjamie sx_sunlock(&allprison_lock); 2480192895Sjamie else if (flags & PD_LIST_XLOCKED) 2481192895Sjamie sx_xunlock(&allprison_lock); 2482192895Sjamie return; 2483191673Sjamie } 2484191673Sjamie 2485192895Sjamie mtx_unlock(&pr->pr_mtx); 2486192895Sjamie if (flags & PD_LIST_SLOCKED) { 2487192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2488192895Sjamie sx_sunlock(&allprison_lock); 2489192895Sjamie sx_xlock(&allprison_lock); 2490192895Sjamie } 2491192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2492192895Sjamie sx_xlock(&allprison_lock); 2493168489Spjd 2494192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2495192895Sjamie LIST_REMOVE(pr, pr_sibling); 2496192895Sjamie ppr = pr->pr_parent; 2497192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2498194762Sjamie tpr->pr_childcount--; 2499196592Sjamie sx_xunlock(&allprison_lock); 2500192895Sjamie 2501194251Sjamie#ifdef VIMAGE 2502196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2503194251Sjamie vnet_destroy(pr->pr_vnet); 2504194251Sjamie#endif 2505192895Sjamie if (pr->pr_root != NULL) { 2506192895Sjamie vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2507192895Sjamie vrele(pr->pr_root); 2508192895Sjamie VFS_UNLOCK_GIANT(vfslocked); 2509192895Sjamie } 2510192895Sjamie mtx_destroy(&pr->pr_mtx); 2511191673Sjamie#ifdef INET 2512192895Sjamie free(pr->pr_ip4, M_PRISON); 2513191673Sjamie#endif 2514185435Sbz#ifdef INET6 2515192895Sjamie free(pr->pr_ip6, M_PRISON); 2516185435Sbz#endif 2517192895Sjamie if (pr->pr_cpuset != NULL) 2518192895Sjamie cpuset_rel(pr->pr_cpuset); 2519192895Sjamie osd_jail_exit(pr); 2520192895Sjamie free(pr, M_PRISON); 2521192895Sjamie 2522192895Sjamie /* Removing a prison frees a reference on its parent. */ 2523192895Sjamie pr = ppr; 2524192895Sjamie mtx_lock(&pr->pr_mtx); 2525196592Sjamie flags = PD_DEREF; 2526192895Sjamie } 2527124882Srwatson} 2528124882Srwatson 252972786Srwatsonvoid 2530185029Spjdprison_hold_locked(struct prison *pr) 253172786Srwatson{ 253272786Srwatson 2533185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2534168489Spjd KASSERT(pr->pr_ref > 0, 2535191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 253672786Srwatson pr->pr_ref++; 2537185029Spjd} 2538185029Spjd 2539185029Spjdvoid 2540185029Spjdprison_hold(struct prison *pr) 2541185029Spjd{ 2542185029Spjd 2543185029Spjd mtx_lock(&pr->pr_mtx); 2544185029Spjd prison_hold_locked(pr); 254587275Srwatson mtx_unlock(&pr->pr_mtx); 254672786Srwatson} 254772786Srwatson 2548185435Sbzvoid 2549185435Sbzprison_proc_hold(struct prison *pr) 255087275Srwatson{ 255187275Srwatson 2552185435Sbz mtx_lock(&pr->pr_mtx); 2553191673Sjamie KASSERT(pr->pr_uref > 0, 2554191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2555191673Sjamie pr->pr_uref++; 2556185435Sbz mtx_unlock(&pr->pr_mtx); 255787275Srwatson} 255887275Srwatson 2559185435Sbzvoid 2560185435Sbzprison_proc_free(struct prison *pr) 2561185435Sbz{ 2562185435Sbz 2563185435Sbz mtx_lock(&pr->pr_mtx); 2564191673Sjamie KASSERT(pr->pr_uref > 0, 2565191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2566191673Sjamie prison_deref(pr, PD_DEUREF | PD_LOCKED); 2567185435Sbz} 2568185435Sbz 2569185435Sbz 2570185435Sbz#ifdef INET 2571185435Sbz/* 2572192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2573192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2574192895Sjamie */ 2575192895Sjamiestatic int 2576192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2577192895Sjamie{ 2578192895Sjamie int ii, ij, used; 2579192895Sjamie struct prison *ppr; 2580192895Sjamie 2581192895Sjamie ppr = pr->pr_parent; 2582192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2583192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2584192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2585192895Sjamie /* 2586192895Sjamie * There's no room for the parent's list. Use the 2587192895Sjamie * new list buffer, which is assumed to be big enough 2588192895Sjamie * (if it was passed). If there's no buffer, try to 2589192895Sjamie * allocate one. 2590192895Sjamie */ 2591192895Sjamie used = 1; 2592192895Sjamie if (newip4 == NULL) { 2593192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2594192895Sjamie M_PRISON, M_NOWAIT); 2595192895Sjamie if (newip4 != NULL) 2596192895Sjamie used = 0; 2597192895Sjamie } 2598192895Sjamie if (newip4 != NULL) { 2599192895Sjamie bcopy(ppr->pr_ip4, newip4, 2600192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2601192895Sjamie free(pr->pr_ip4, M_PRISON); 2602192895Sjamie pr->pr_ip4 = newip4; 2603192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2604192895Sjamie } 2605192895Sjamie return (used); 2606192895Sjamie } 2607192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2608192895Sjamie if (pr->pr_ip4s > 0) 2609192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2610192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2611192895Sjamie else if (pr->pr_ip4 != NULL) { 2612192895Sjamie free(pr->pr_ip4, M_PRISON); 2613192895Sjamie pr->pr_ip4 = NULL; 2614192895Sjamie } 2615195974Sjamie } else if (pr->pr_ip4s > 0) { 2616192895Sjamie /* Remove addresses that aren't in the parent. */ 2617192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2618192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2619192895Sjamie break; 2620192895Sjamie if (ij < ppr->pr_ip4s) 2621192895Sjamie ii = 1; 2622192895Sjamie else { 2623192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2624192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2625192895Sjamie ii = 0; 2626192895Sjamie } 2627192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2628192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2629192895Sjamie ii++; 2630192895Sjamie continue; 2631192895Sjamie } 2632192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2633192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2634192895Sjamie case -1: 2635192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2636192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2637192895Sjamie break; 2638192895Sjamie case 0: 2639192895Sjamie ii++; 2640192895Sjamie ij++; 2641192895Sjamie break; 2642192895Sjamie case 1: 2643192895Sjamie ij++; 2644192895Sjamie break; 2645192895Sjamie } 2646192895Sjamie } 2647192895Sjamie if (pr->pr_ip4s == 0) { 2648195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2649192895Sjamie free(pr->pr_ip4, M_PRISON); 2650192895Sjamie pr->pr_ip4 = NULL; 2651192895Sjamie } 2652192895Sjamie } 2653192895Sjamie return (0); 2654192895Sjamie} 2655192895Sjamie 2656192895Sjamie/* 2657185435Sbz * Pass back primary IPv4 address of this jail. 2658185435Sbz * 2659192895Sjamie * If not restricted return success but do not alter the address. Caller has 2660192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2661185435Sbz * 2662188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2663188144Sjamie * Address returned in NBO. 2664185435Sbz */ 266546155Sphkint 2666187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 266746155Sphk{ 2668191673Sjamie struct prison *pr; 266946155Sphk 2670185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2671185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2672185435Sbz 2673192895Sjamie pr = cred->cr_prison; 2674192895Sjamie if (!(pr->pr_flags & PR_IP4)) 267546155Sphk return (0); 2676191673Sjamie mtx_lock(&pr->pr_mtx); 2677192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2678192895Sjamie mtx_unlock(&pr->pr_mtx); 2679192895Sjamie return (0); 2680192895Sjamie } 2681191673Sjamie if (pr->pr_ip4 == NULL) { 2682191673Sjamie mtx_unlock(&pr->pr_mtx); 2683188144Sjamie return (EAFNOSUPPORT); 2684191673Sjamie } 2685185435Sbz 2686191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2687191673Sjamie mtx_unlock(&pr->pr_mtx); 2688185435Sbz return (0); 2689185435Sbz} 2690185435Sbz 2691185435Sbz/* 2692202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2693202468Sbz * We will return 0 if we should bypass source address selection in favour 2694202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2695202468Sbz * returned in NBO. 2696202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2697202468Sbz */ 2698202468Sbzint 2699202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2700202468Sbz{ 2701202468Sbz struct prison *pr; 2702202468Sbz struct in_addr lia; 2703202468Sbz int error; 2704202468Sbz 2705202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2706202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2707202468Sbz 2708202468Sbz if (!jailed(cred)) 2709202468Sbz return (1); 2710202468Sbz 2711202468Sbz pr = cred->cr_prison; 2712202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2713202468Sbz return (1); 2714202468Sbz 2715202468Sbz lia.s_addr = INADDR_ANY; 2716202468Sbz error = prison_get_ip4(cred, &lia); 2717202468Sbz if (error) 2718202468Sbz return (error); 2719202468Sbz if (lia.s_addr == INADDR_ANY) 2720202468Sbz return (1); 2721202468Sbz 2722202468Sbz ia->s_addr = lia.s_addr; 2723202468Sbz return (0); 2724202468Sbz} 2725202468Sbz 2726202468Sbz/* 2727192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2728192895Sjamie */ 2729192895Sjamieint 2730192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2731192895Sjamie{ 2732192895Sjamie 2733192895Sjamie if (pr1 == pr2) 2734192895Sjamie return (1); 2735192895Sjamie 2736192895Sjamie /* 2737195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2738195974Sjamie * existing prisons. 2739192895Sjamie */ 2740195945Sjamie while (pr1 != &prison0 && 2741195945Sjamie#ifdef VIMAGE 2742195945Sjamie !(pr1->pr_flags & PR_VNET) && 2743195945Sjamie#endif 2744195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2745192895Sjamie pr1 = pr1->pr_parent; 2746195945Sjamie while (pr2 != &prison0 && 2747195945Sjamie#ifdef VIMAGE 2748195945Sjamie !(pr2->pr_flags & PR_VNET) && 2749195945Sjamie#endif 2750195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2751192895Sjamie pr2 = pr2->pr_parent; 2752192895Sjamie return (pr1 == pr2); 2753192895Sjamie} 2754192895Sjamie 2755192895Sjamie/* 2756185435Sbz * Make sure our (source) address is set to something meaningful to this 2757185435Sbz * jail. 2758185435Sbz * 2759192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2760192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2761192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2762185435Sbz */ 2763185435Sbzint 2764185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2765185435Sbz{ 2766191673Sjamie struct prison *pr; 2767185435Sbz struct in_addr ia0; 2768191673Sjamie int error; 2769185435Sbz 2770185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2771185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2772185435Sbz 2773192895Sjamie pr = cred->cr_prison; 2774192895Sjamie if (!(pr->pr_flags & PR_IP4)) 277546155Sphk return (0); 2776191673Sjamie mtx_lock(&pr->pr_mtx); 2777192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2778192895Sjamie mtx_unlock(&pr->pr_mtx); 2779192895Sjamie return (0); 2780192895Sjamie } 2781191673Sjamie if (pr->pr_ip4 == NULL) { 2782191673Sjamie mtx_unlock(&pr->pr_mtx); 2783188144Sjamie return (EAFNOSUPPORT); 2784191673Sjamie } 2785185435Sbz 2786185435Sbz ia0.s_addr = ntohl(ia->s_addr); 2787185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 2788191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2789191673Sjamie mtx_unlock(&pr->pr_mtx); 2790185435Sbz return (0); 279146155Sphk } 2792185435Sbz 2793188144Sjamie if (ia0.s_addr == INADDR_ANY) { 2794188144Sjamie /* 2795188144Sjamie * In case there is only 1 IPv4 address, bind directly. 2796188144Sjamie */ 2797191673Sjamie if (pr->pr_ip4s == 1) 2798191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2799191673Sjamie mtx_unlock(&pr->pr_mtx); 2800185435Sbz return (0); 2801185435Sbz } 2802185435Sbz 2803191673Sjamie error = _prison_check_ip4(pr, ia); 2804191673Sjamie mtx_unlock(&pr->pr_mtx); 2805191673Sjamie return (error); 2806185435Sbz} 2807185435Sbz 2808185435Sbz/* 2809185435Sbz * Rewrite destination address in case we will connect to loopback address. 2810185435Sbz * 2811188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2812188144Sjamie * Address passed in in NBO and returned in NBO. 2813185435Sbz */ 2814185435Sbzint 2815185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2816185435Sbz{ 2817191673Sjamie struct prison *pr; 2818185435Sbz 2819185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2820185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2821185435Sbz 2822192895Sjamie pr = cred->cr_prison; 2823192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2824185435Sbz return (0); 2825191673Sjamie mtx_lock(&pr->pr_mtx); 2826192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2827192895Sjamie mtx_unlock(&pr->pr_mtx); 2828192895Sjamie return (0); 2829192895Sjamie } 2830191673Sjamie if (pr->pr_ip4 == NULL) { 2831191673Sjamie mtx_unlock(&pr->pr_mtx); 2832188144Sjamie return (EAFNOSUPPORT); 2833191673Sjamie } 2834188144Sjamie 2835185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2836191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2837191673Sjamie mtx_unlock(&pr->pr_mtx); 2838185435Sbz return (0); 2839185435Sbz } 2840185435Sbz 2841185435Sbz /* 2842185435Sbz * Return success because nothing had to be changed. 2843185435Sbz */ 2844191673Sjamie mtx_unlock(&pr->pr_mtx); 2845185435Sbz return (0); 2846185435Sbz} 2847185435Sbz 2848185435Sbz/* 2849188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 2850185435Sbz * 2851192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2852192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2853192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 2854185435Sbz */ 2855185435Sbzstatic int 2856185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 2857185435Sbz{ 2858185435Sbz int i, a, z, d; 2859185435Sbz 2860185435Sbz /* 2861185435Sbz * Check the primary IP. 2862185435Sbz */ 2863185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 2864188144Sjamie return (0); 2865185435Sbz 2866185435Sbz /* 2867185435Sbz * All the other IPs are sorted so we can do a binary search. 2868185435Sbz */ 2869185435Sbz a = 0; 2870185435Sbz z = pr->pr_ip4s - 2; 2871185435Sbz while (a <= z) { 2872185435Sbz i = (a + z) / 2; 2873185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2874185435Sbz if (d > 0) 2875185435Sbz z = i - 1; 2876185435Sbz else if (d < 0) 2877185435Sbz a = i + 1; 287881114Srwatson else 2879188144Sjamie return (0); 2880185435Sbz } 2881188144Sjamie 2882188144Sjamie return (EADDRNOTAVAIL); 2883185435Sbz} 2884185435Sbz 2885185435Sbzint 2886185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 2887185435Sbz{ 2888191673Sjamie struct prison *pr; 2889191673Sjamie int error; 2890185435Sbz 2891185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2892185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2893185435Sbz 2894192895Sjamie pr = cred->cr_prison; 2895192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2896188144Sjamie return (0); 2897191673Sjamie mtx_lock(&pr->pr_mtx); 2898192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2899192895Sjamie mtx_unlock(&pr->pr_mtx); 2900192895Sjamie return (0); 2901192895Sjamie } 2902191673Sjamie if (pr->pr_ip4 == NULL) { 2903191673Sjamie mtx_unlock(&pr->pr_mtx); 2904188144Sjamie return (EAFNOSUPPORT); 2905191673Sjamie } 2906185435Sbz 2907191673Sjamie error = _prison_check_ip4(pr, ia); 2908191673Sjamie mtx_unlock(&pr->pr_mtx); 2909191673Sjamie return (error); 2910185435Sbz} 2911185435Sbz#endif 2912185435Sbz 2913185435Sbz#ifdef INET6 2914192895Sjamiestatic int 2915192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2916192895Sjamie{ 2917192895Sjamie int ii, ij, used; 2918192895Sjamie struct prison *ppr; 2919192895Sjamie 2920192895Sjamie ppr = pr->pr_parent; 2921192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 2922192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2923192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 2924192895Sjamie /* 2925192895Sjamie * There's no room for the parent's list. Use the 2926192895Sjamie * new list buffer, which is assumed to be big enough 2927192895Sjamie * (if it was passed). If there's no buffer, try to 2928192895Sjamie * allocate one. 2929192895Sjamie */ 2930192895Sjamie used = 1; 2931192895Sjamie if (newip6 == NULL) { 2932192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 2933192895Sjamie M_PRISON, M_NOWAIT); 2934192895Sjamie if (newip6 != NULL) 2935192895Sjamie used = 0; 2936192895Sjamie } 2937192895Sjamie if (newip6 != NULL) { 2938192895Sjamie bcopy(ppr->pr_ip6, newip6, 2939192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 2940192895Sjamie free(pr->pr_ip6, M_PRISON); 2941192895Sjamie pr->pr_ip6 = newip6; 2942192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2943192895Sjamie } 2944192895Sjamie return (used); 2945192895Sjamie } 2946192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2947192895Sjamie if (pr->pr_ip6s > 0) 2948192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 2949192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 2950192895Sjamie else if (pr->pr_ip6 != NULL) { 2951192895Sjamie free(pr->pr_ip6, M_PRISON); 2952192895Sjamie pr->pr_ip6 = NULL; 2953192895Sjamie } 2954195974Sjamie } else if (pr->pr_ip6s > 0) { 2955192895Sjamie /* Remove addresses that aren't in the parent. */ 2956192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 2957192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 2958192895Sjamie &ppr->pr_ip6[ij])) 2959192895Sjamie break; 2960192895Sjamie if (ij < ppr->pr_ip6s) 2961192895Sjamie ii = 1; 2962192895Sjamie else { 2963192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 2964192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2965192895Sjamie ii = 0; 2966192895Sjamie } 2967192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 2968192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 2969192895Sjamie &ppr->pr_ip6[0])) { 2970192895Sjamie ii++; 2971192895Sjamie continue; 2972192895Sjamie } 2973192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2974192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 2975192895Sjamie case -1: 2976192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 2977192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 2978192895Sjamie break; 2979192895Sjamie case 0: 2980192895Sjamie ii++; 2981192895Sjamie ij++; 2982192895Sjamie break; 2983192895Sjamie case 1: 2984192895Sjamie ij++; 2985192895Sjamie break; 2986192895Sjamie } 2987192895Sjamie } 2988192895Sjamie if (pr->pr_ip6s == 0) { 2989195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 2990192895Sjamie free(pr->pr_ip6, M_PRISON); 2991192895Sjamie pr->pr_ip6 = NULL; 2992192895Sjamie } 2993192895Sjamie } 2994192895Sjamie return 0; 2995192895Sjamie} 2996192895Sjamie 2997185435Sbz/* 2998185435Sbz * Pass back primary IPv6 address for this jail. 2999185435Sbz * 3000192895Sjamie * If not restricted return success but do not alter the address. Caller has 3001192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3002185435Sbz * 3003188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3004185435Sbz */ 3005185435Sbzint 3006187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3007185435Sbz{ 3008191673Sjamie struct prison *pr; 3009185435Sbz 3010185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3011185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3012185435Sbz 3013192895Sjamie pr = cred->cr_prison; 3014192895Sjamie if (!(pr->pr_flags & PR_IP6)) 301581114Srwatson return (0); 3016191673Sjamie mtx_lock(&pr->pr_mtx); 3017192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3018192895Sjamie mtx_unlock(&pr->pr_mtx); 3019192895Sjamie return (0); 3020192895Sjamie } 3021191673Sjamie if (pr->pr_ip6 == NULL) { 3022191673Sjamie mtx_unlock(&pr->pr_mtx); 3023188144Sjamie return (EAFNOSUPPORT); 3024191673Sjamie } 3025188144Sjamie 3026191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3027191673Sjamie mtx_unlock(&pr->pr_mtx); 3028185435Sbz return (0); 3029185435Sbz} 3030185435Sbz 3031185435Sbz/* 3032202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3033202468Sbz * We will return 0 if we should bypass source address selection in favour 3034202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3035202468Sbz * returned in NBO. 3036202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3037202468Sbz */ 3038202468Sbzint 3039202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3040202468Sbz{ 3041202468Sbz struct prison *pr; 3042202468Sbz struct in6_addr lia6; 3043202468Sbz int error; 3044202468Sbz 3045202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3046202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3047202468Sbz 3048202468Sbz if (!jailed(cred)) 3049202468Sbz return (1); 3050202468Sbz 3051202468Sbz pr = cred->cr_prison; 3052202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3053202468Sbz return (1); 3054202468Sbz 3055202468Sbz lia6 = in6addr_any; 3056202468Sbz error = prison_get_ip6(cred, &lia6); 3057202468Sbz if (error) 3058202468Sbz return (error); 3059202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3060202468Sbz return (1); 3061202468Sbz 3062202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3063202468Sbz return (0); 3064202468Sbz} 3065202468Sbz 3066202468Sbz/* 3067192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3068192895Sjamie */ 3069192895Sjamieint 3070192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3071192895Sjamie{ 3072192895Sjamie 3073192895Sjamie if (pr1 == pr2) 3074192895Sjamie return (1); 3075192895Sjamie 3076195945Sjamie while (pr1 != &prison0 && 3077195945Sjamie#ifdef VIMAGE 3078195945Sjamie !(pr1->pr_flags & PR_VNET) && 3079195945Sjamie#endif 3080195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3081192895Sjamie pr1 = pr1->pr_parent; 3082195945Sjamie while (pr2 != &prison0 && 3083195945Sjamie#ifdef VIMAGE 3084195945Sjamie !(pr2->pr_flags & PR_VNET) && 3085195945Sjamie#endif 3086195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3087192895Sjamie pr2 = pr2->pr_parent; 3088192895Sjamie return (pr1 == pr2); 3089192895Sjamie} 3090192895Sjamie 3091192895Sjamie/* 3092185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3093185435Sbz * 3094185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3095185435Sbz * when needed while binding. 3096185435Sbz * 3097192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3098192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3099192895Sjamie * doesn't allow IPv6. 3100185435Sbz */ 3101185435Sbzint 3102185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3103185435Sbz{ 3104191673Sjamie struct prison *pr; 3105191673Sjamie int error; 3106185435Sbz 3107185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3108185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3109185435Sbz 3110192895Sjamie pr = cred->cr_prison; 3111192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3112185435Sbz return (0); 3113191673Sjamie mtx_lock(&pr->pr_mtx); 3114192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3115192895Sjamie mtx_unlock(&pr->pr_mtx); 3116192895Sjamie return (0); 3117192895Sjamie } 3118191673Sjamie if (pr->pr_ip6 == NULL) { 3119191673Sjamie mtx_unlock(&pr->pr_mtx); 3120188144Sjamie return (EAFNOSUPPORT); 3121191673Sjamie } 3122188144Sjamie 3123185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3124191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3125191673Sjamie mtx_unlock(&pr->pr_mtx); 3126185435Sbz return (0); 312781114Srwatson } 3128185435Sbz 3129188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3130188144Sjamie /* 3131188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3132188144Sjamie * then bind directly. 3133188144Sjamie */ 3134191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3135191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3136191673Sjamie mtx_unlock(&pr->pr_mtx); 3137185435Sbz return (0); 3138185435Sbz } 3139188144Sjamie 3140191673Sjamie error = _prison_check_ip6(pr, ia6); 3141191673Sjamie mtx_unlock(&pr->pr_mtx); 3142191673Sjamie return (error); 3143185435Sbz} 3144185435Sbz 3145185435Sbz/* 3146185435Sbz * Rewrite destination address in case we will connect to loopback address. 3147185435Sbz * 3148188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3149185435Sbz */ 3150185435Sbzint 3151185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3152185435Sbz{ 3153191673Sjamie struct prison *pr; 3154185435Sbz 3155185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3156185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3157185435Sbz 3158192895Sjamie pr = cred->cr_prison; 3159192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3160185435Sbz return (0); 3161191673Sjamie mtx_lock(&pr->pr_mtx); 3162192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3163192895Sjamie mtx_unlock(&pr->pr_mtx); 3164192895Sjamie return (0); 3165192895Sjamie } 3166191673Sjamie if (pr->pr_ip6 == NULL) { 3167191673Sjamie mtx_unlock(&pr->pr_mtx); 3168188144Sjamie return (EAFNOSUPPORT); 3169191673Sjamie } 3170188144Sjamie 3171185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3172191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3173191673Sjamie mtx_unlock(&pr->pr_mtx); 3174185435Sbz return (0); 3175185435Sbz } 3176185435Sbz 3177185435Sbz /* 3178185435Sbz * Return success because nothing had to be changed. 3179185435Sbz */ 3180191673Sjamie mtx_unlock(&pr->pr_mtx); 318146155Sphk return (0); 318246155Sphk} 318346155Sphk 3184185435Sbz/* 3185188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3186185435Sbz * 3187192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3188192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3189192895Sjamie * doesn't allow IPv6. 3190185435Sbz */ 3191185435Sbzstatic int 3192185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 319346155Sphk{ 3194185435Sbz int i, a, z, d; 319546155Sphk 3196185435Sbz /* 3197185435Sbz * Check the primary IP. 3198185435Sbz */ 3199185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3200188144Sjamie return (0); 3201185435Sbz 3202185435Sbz /* 3203185435Sbz * All the other IPs are sorted so we can do a binary search. 3204185435Sbz */ 3205185435Sbz a = 0; 3206185435Sbz z = pr->pr_ip6s - 2; 3207185435Sbz while (a <= z) { 3208185435Sbz i = (a + z) / 2; 3209185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3210185435Sbz if (d > 0) 3211185435Sbz z = i - 1; 3212185435Sbz else if (d < 0) 3213185435Sbz a = i + 1; 321446155Sphk else 3215188144Sjamie return (0); 321646155Sphk } 3217188144Sjamie 3218188144Sjamie return (EADDRNOTAVAIL); 321946155Sphk} 322046155Sphk 322146155Sphkint 3222185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3223185435Sbz{ 3224191673Sjamie struct prison *pr; 3225191673Sjamie int error; 3226185435Sbz 3227185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3228185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3229185435Sbz 3230192895Sjamie pr = cred->cr_prison; 3231192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3232188144Sjamie return (0); 3233191673Sjamie mtx_lock(&pr->pr_mtx); 3234192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3235192895Sjamie mtx_unlock(&pr->pr_mtx); 3236192895Sjamie return (0); 3237192895Sjamie } 3238191673Sjamie if (pr->pr_ip6 == NULL) { 3239191673Sjamie mtx_unlock(&pr->pr_mtx); 3240188144Sjamie return (EAFNOSUPPORT); 3241191673Sjamie } 3242185435Sbz 3243191673Sjamie error = _prison_check_ip6(pr, ia6); 3244191673Sjamie mtx_unlock(&pr->pr_mtx); 3245191673Sjamie return (error); 3246185435Sbz} 3247185435Sbz#endif 3248185435Sbz 3249185435Sbz/* 3250188146Sjamie * Check if a jail supports the given address family. 3251188146Sjamie * 3252188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3253188146Sjamie * if not. 3254188146Sjamie */ 3255188146Sjamieint 3256188146Sjamieprison_check_af(struct ucred *cred, int af) 3257188146Sjamie{ 3258192895Sjamie struct prison *pr; 3259188146Sjamie int error; 3260188146Sjamie 3261188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3262188146Sjamie 3263192895Sjamie pr = cred->cr_prison; 3264194923Sjamie#ifdef VIMAGE 3265194915Sjamie /* Prisons with their own network stack are not limited. */ 3266200473Sbz if (prison_owns_vnet(cred)) 3267194915Sjamie return (0); 3268194923Sjamie#endif 3269194915Sjamie 3270188146Sjamie error = 0; 3271188146Sjamie switch (af) 3272188146Sjamie { 3273188146Sjamie#ifdef INET 3274188146Sjamie case AF_INET: 3275192895Sjamie if (pr->pr_flags & PR_IP4) 3276192895Sjamie { 3277192895Sjamie mtx_lock(&pr->pr_mtx); 3278192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3279192895Sjamie error = EAFNOSUPPORT; 3280192895Sjamie mtx_unlock(&pr->pr_mtx); 3281192895Sjamie } 3282188146Sjamie break; 3283188146Sjamie#endif 3284188146Sjamie#ifdef INET6 3285188146Sjamie case AF_INET6: 3286192895Sjamie if (pr->pr_flags & PR_IP6) 3287192895Sjamie { 3288192895Sjamie mtx_lock(&pr->pr_mtx); 3289192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3290192895Sjamie error = EAFNOSUPPORT; 3291192895Sjamie mtx_unlock(&pr->pr_mtx); 3292192895Sjamie } 3293188146Sjamie break; 3294188146Sjamie#endif 3295188146Sjamie case AF_LOCAL: 3296188146Sjamie case AF_ROUTE: 3297188146Sjamie break; 3298188146Sjamie default: 3299192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3300188146Sjamie error = EAFNOSUPPORT; 3301188146Sjamie } 3302188146Sjamie return (error); 3303188146Sjamie} 3304188146Sjamie 3305188146Sjamie/* 3306185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3307185435Sbz * prison_check_ip[46]). 3308185435Sbz * 3309192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3310192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3311192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3312185435Sbz */ 3313185435Sbzint 331472786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 331546155Sphk{ 3316185435Sbz#ifdef INET 3317114168Smike struct sockaddr_in *sai; 3318185435Sbz#endif 3319185435Sbz#ifdef INET6 3320185435Sbz struct sockaddr_in6 *sai6; 3321185435Sbz#endif 3322188144Sjamie int error; 332346155Sphk 3324185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3325185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3326185435Sbz 3327200473Sbz#ifdef VIMAGE 3328200473Sbz if (prison_owns_vnet(cred)) 3329200473Sbz return (0); 3330200473Sbz#endif 3331200473Sbz 3332188144Sjamie error = 0; 3333188144Sjamie switch (sa->sa_family) 3334185435Sbz { 3335185435Sbz#ifdef INET 3336185435Sbz case AF_INET: 3337185435Sbz sai = (struct sockaddr_in *)sa; 3338188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3339185435Sbz break; 3340185435Sbz#endif 3341185435Sbz#ifdef INET6 3342185435Sbz case AF_INET6: 3343185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3344188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3345185435Sbz break; 3346185435Sbz#endif 3347185435Sbz default: 3348192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3349188144Sjamie error = EAFNOSUPPORT; 3350185435Sbz } 3351188144Sjamie return (error); 335246155Sphk} 335372786Srwatson 335472786Srwatson/* 335572786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 335672786Srwatson */ 335772786Srwatsonint 3358114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 335972786Srwatson{ 336072786Srwatson 3361192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3362192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3363192895Sjamie} 336472786Srwatson 3365192895Sjamie/* 3366192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3367192895Sjamie */ 3368192895Sjamieint 3369192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3370192895Sjamie{ 3371192895Sjamie 3372192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3373192895Sjamie if (pr1 == pr2) 3374192895Sjamie return (1); 337572786Srwatson return (0); 337672786Srwatson} 337772786Srwatson 337872786Srwatson/* 337972786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 338072786Srwatson */ 338172786Srwatsonint 3382114168Smikejailed(struct ucred *cred) 338372786Srwatson{ 338472786Srwatson 3385192895Sjamie return (cred->cr_prison != &prison0); 338672786Srwatson} 338791384Srobert 338891384Srobert/* 3389200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3390200473Sbz * have its own virtual network stack, otherwise 0. 3391200473Sbz */ 3392200473Sbzint 3393200473Sbzjailed_without_vnet(struct ucred *cred) 3394200473Sbz{ 3395200473Sbz 3396200473Sbz if (!jailed(cred)) 3397200473Sbz return (0); 3398200473Sbz#ifdef VIMAGE 3399200473Sbz if (prison_owns_vnet(cred)) 3400200473Sbz return (0); 3401200473Sbz#endif 3402200473Sbz 3403200473Sbz return (1); 3404200473Sbz} 3405200473Sbz 3406200473Sbz/* 3407194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 340891384Srobert */ 340991391Srobertvoid 3410114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 341191384Srobert{ 3412193066Sjamie struct prison *pr; 341391384Srobert 3414194090Sjamie /* 3415194090Sjamie * A NULL credential can be used to shortcut to the physical 3416194090Sjamie * system's hostname. 3417194090Sjamie */ 3418193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3419193066Sjamie mtx_lock(&pr->pr_mtx); 3420194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3421193066Sjamie mtx_unlock(&pr->pr_mtx); 342291384Srobert} 3423113275Smike 3424194090Sjamievoid 3425194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3426194090Sjamie{ 3427194090Sjamie 3428194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3429194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3430194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3431194090Sjamie} 3432194090Sjamie 3433194090Sjamievoid 3434194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3435194090Sjamie{ 3436194090Sjamie 3437194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3438194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3439194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3440194090Sjamie} 3441194090Sjamie 3442194090Sjamievoid 3443194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3444194090Sjamie{ 3445194090Sjamie 3446194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3447194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3448194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3449194090Sjamie} 3450194090Sjamie 3451196176Sbz#ifdef VIMAGE 3452125804Srwatson/* 3453196176Sbz * Determine whether the prison represented by cred owns 3454196176Sbz * its vnet rather than having it inherited. 3455196176Sbz * 3456196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3457196176Sbz */ 3458196176Sbzint 3459196176Sbzprison_owns_vnet(struct ucred *cred) 3460196176Sbz{ 3461196176Sbz 3462196176Sbz /* 3463196176Sbz * vnets cannot be added/removed after jail creation, 3464196176Sbz * so no need to lock here. 3465196176Sbz */ 3466196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3467196176Sbz} 3468196176Sbz#endif 3469196176Sbz 3470196176Sbz/* 3471147185Spjd * Determine whether the subject represented by cred can "see" 3472147185Spjd * status of a mount point. 3473147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3474147185Spjd * XXX: This function should be called cr_canseemount() and should be 3475147185Spjd * placed in kern_prot.c. 3476125804Srwatson */ 3477125804Srwatsonint 3478147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3479125804Srwatson{ 3480147185Spjd struct prison *pr; 3481147185Spjd struct statfs *sp; 3482147185Spjd size_t len; 3483125804Srwatson 3484192895Sjamie pr = cred->cr_prison; 3485192895Sjamie if (pr->pr_enforce_statfs == 0) 3486147185Spjd return (0); 3487147185Spjd if (pr->pr_root->v_mount == mp) 3488147185Spjd return (0); 3489192895Sjamie if (pr->pr_enforce_statfs == 2) 3490147185Spjd return (ENOENT); 3491147185Spjd /* 3492147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3493147185Spjd * all mount-points from inside a jail. 3494147185Spjd * This is ugly check, but this is the only situation when jail's 3495147185Spjd * directory ends with '/'. 3496147185Spjd */ 3497147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3498147185Spjd return (0); 3499147185Spjd len = strlen(pr->pr_path); 3500147185Spjd sp = &mp->mnt_stat; 3501147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3502147185Spjd return (ENOENT); 3503147185Spjd /* 3504147185Spjd * Be sure that we don't have situation where jail's root directory 3505147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3506147185Spjd */ 3507147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3508147185Spjd return (ENOENT); 3509147185Spjd return (0); 3510147185Spjd} 3511147185Spjd 3512147185Spjdvoid 3513147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3514147185Spjd{ 3515147185Spjd char jpath[MAXPATHLEN]; 3516147185Spjd struct prison *pr; 3517147185Spjd size_t len; 3518147185Spjd 3519192895Sjamie pr = cred->cr_prison; 3520192895Sjamie if (pr->pr_enforce_statfs == 0) 3521147185Spjd return; 3522147185Spjd if (prison_canseemount(cred, mp) != 0) { 3523147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3524147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3525147185Spjd sizeof(sp->f_mntonname)); 3526147185Spjd return; 3527125804Srwatson } 3528147185Spjd if (pr->pr_root->v_mount == mp) { 3529147185Spjd /* 3530147185Spjd * Clear current buffer data, so we are sure nothing from 3531147185Spjd * the valid path left there. 3532147185Spjd */ 3533147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3534147185Spjd *sp->f_mntonname = '/'; 3535147185Spjd return; 3536147185Spjd } 3537147185Spjd /* 3538147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3539147185Spjd * all mount-points from inside a jail. 3540147185Spjd */ 3541147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3542147185Spjd return; 3543147185Spjd len = strlen(pr->pr_path); 3544147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3545147185Spjd /* 3546147185Spjd * Clear current buffer data, so we are sure nothing from 3547147185Spjd * the valid path left there. 3548147185Spjd */ 3549147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3550147185Spjd if (*jpath == '\0') { 3551147185Spjd /* Should never happen. */ 3552147185Spjd *sp->f_mntonname = '/'; 3553147185Spjd } else { 3554147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3555147185Spjd } 3556125804Srwatson} 3557125804Srwatson 3558164032Srwatson/* 3559164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3560164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3561164032Srwatson */ 3562164032Srwatsonint 3563164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3564164032Srwatson{ 3565164032Srwatson 3566164032Srwatson if (!jailed(cred)) 3567164032Srwatson return (0); 3568164032Srwatson 3569194915Sjamie#ifdef VIMAGE 3570194915Sjamie /* 3571194915Sjamie * Privileges specific to prisons with a virtual network stack. 3572194915Sjamie * There might be a duplicate entry here in case the privilege 3573194915Sjamie * is only granted conditionally in the legacy jail case. 3574194915Sjamie */ 3575164032Srwatson switch (priv) { 3576194915Sjamie#ifdef notyet 3577194915Sjamie /* 3578194915Sjamie * NFS-specific privileges. 3579194915Sjamie */ 3580194915Sjamie case PRIV_NFS_DAEMON: 3581194915Sjamie case PRIV_NFS_LOCKD: 3582194915Sjamie#endif 3583194915Sjamie /* 3584194915Sjamie * Network stack privileges. 3585194915Sjamie */ 3586194915Sjamie case PRIV_NET_BRIDGE: 3587194915Sjamie case PRIV_NET_GRE: 3588194915Sjamie case PRIV_NET_BPF: 3589194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3590194915Sjamie case PRIV_NET_ROUTE: 3591194915Sjamie case PRIV_NET_TAP: 3592194915Sjamie case PRIV_NET_SETIFMTU: 3593194915Sjamie case PRIV_NET_SETIFFLAGS: 3594194915Sjamie case PRIV_NET_SETIFCAP: 3595194915Sjamie case PRIV_NET_SETIFNAME : 3596194915Sjamie case PRIV_NET_SETIFMETRIC: 3597194915Sjamie case PRIV_NET_SETIFPHYS: 3598194915Sjamie case PRIV_NET_SETIFMAC: 3599194915Sjamie case PRIV_NET_ADDMULTI: 3600194915Sjamie case PRIV_NET_DELMULTI: 3601194915Sjamie case PRIV_NET_HWIOCTL: 3602194915Sjamie case PRIV_NET_SETLLADDR: 3603194915Sjamie case PRIV_NET_ADDIFGROUP: 3604194915Sjamie case PRIV_NET_DELIFGROUP: 3605194915Sjamie case PRIV_NET_IFCREATE: 3606194915Sjamie case PRIV_NET_IFDESTROY: 3607194915Sjamie case PRIV_NET_ADDIFADDR: 3608194915Sjamie case PRIV_NET_DELIFADDR: 3609194915Sjamie case PRIV_NET_LAGG: 3610194915Sjamie case PRIV_NET_GIF: 3611194915Sjamie case PRIV_NET_SETIFVNET: 3612164032Srwatson 3613164032Srwatson /* 3614194915Sjamie * 802.11-related privileges. 3615194915Sjamie */ 3616194915Sjamie case PRIV_NET80211_GETKEY: 3617194915Sjamie#ifdef notyet 3618194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3619194915Sjamie#endif 3620194915Sjamie 3621194915Sjamie#ifdef notyet 3622194915Sjamie /* 3623194915Sjamie * AppleTalk privileges. 3624194915Sjamie */ 3625194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3626194915Sjamie 3627194915Sjamie /* 3628194915Sjamie * ATM privileges. 3629194915Sjamie */ 3630194915Sjamie case PRIV_NETATM_CFG: 3631194915Sjamie case PRIV_NETATM_ADD: 3632194915Sjamie case PRIV_NETATM_DEL: 3633194915Sjamie case PRIV_NETATM_SET: 3634194915Sjamie 3635194915Sjamie /* 3636194915Sjamie * Bluetooth privileges. 3637194915Sjamie */ 3638194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3639194915Sjamie#endif 3640194915Sjamie 3641194915Sjamie /* 3642194915Sjamie * Netgraph and netgraph module privileges. 3643194915Sjamie */ 3644194915Sjamie case PRIV_NETGRAPH_CONTROL: 3645194915Sjamie#ifdef notyet 3646194915Sjamie case PRIV_NETGRAPH_TTY: 3647194915Sjamie#endif 3648194915Sjamie 3649194915Sjamie /* 3650194915Sjamie * IPv4 and IPv6 privileges. 3651194915Sjamie */ 3652194915Sjamie case PRIV_NETINET_IPFW: 3653194915Sjamie case PRIV_NETINET_DIVERT: 3654194915Sjamie case PRIV_NETINET_PF: 3655194915Sjamie case PRIV_NETINET_DUMMYNET: 3656194915Sjamie case PRIV_NETINET_CARP: 3657194915Sjamie case PRIV_NETINET_MROUTE: 3658194915Sjamie case PRIV_NETINET_RAW: 3659194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3660194915Sjamie case PRIV_NETINET_ND6: 3661194915Sjamie case PRIV_NETINET_SCOPE6: 3662194915Sjamie case PRIV_NETINET_ALIFETIME6: 3663194915Sjamie case PRIV_NETINET_IPSEC: 3664194915Sjamie case PRIV_NETINET_BINDANY: 3665194915Sjamie 3666194915Sjamie#ifdef notyet 3667194915Sjamie /* 3668194915Sjamie * IPX/SPX privileges. 3669194915Sjamie */ 3670194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3671194915Sjamie case PRIV_NETIPX_RAW: 3672194915Sjamie 3673194915Sjamie /* 3674194915Sjamie * NCP privileges. 3675194915Sjamie */ 3676194915Sjamie case PRIV_NETNCP: 3677194915Sjamie 3678194915Sjamie /* 3679194915Sjamie * SMB privileges. 3680194915Sjamie */ 3681194915Sjamie case PRIV_NETSMB: 3682194915Sjamie#endif 3683194915Sjamie 3684194915Sjamie /* 3685194915Sjamie * No default: or deny here. 3686194915Sjamie * In case of no permit fall through to next switch(). 3687194915Sjamie */ 3688194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3689194915Sjamie return (0); 3690194915Sjamie } 3691194915Sjamie#endif /* VIMAGE */ 3692194915Sjamie 3693194915Sjamie switch (priv) { 3694194915Sjamie 3695194915Sjamie /* 3696164032Srwatson * Allow ktrace privileges for root in jail. 3697164032Srwatson */ 3698164032Srwatson case PRIV_KTRACE: 3699164032Srwatson 3700166827Srwatson#if 0 3701164032Srwatson /* 3702164032Srwatson * Allow jailed processes to configure audit identity and 3703164032Srwatson * submit audit records (login, etc). In the future we may 3704164032Srwatson * want to further refine the relationship between audit and 3705164032Srwatson * jail. 3706164032Srwatson */ 3707164032Srwatson case PRIV_AUDIT_GETAUDIT: 3708164032Srwatson case PRIV_AUDIT_SETAUDIT: 3709164032Srwatson case PRIV_AUDIT_SUBMIT: 3710166827Srwatson#endif 3711164032Srwatson 3712164032Srwatson /* 3713164032Srwatson * Allow jailed processes to manipulate process UNIX 3714164032Srwatson * credentials in any way they see fit. 3715164032Srwatson */ 3716164032Srwatson case PRIV_CRED_SETUID: 3717164032Srwatson case PRIV_CRED_SETEUID: 3718164032Srwatson case PRIV_CRED_SETGID: 3719164032Srwatson case PRIV_CRED_SETEGID: 3720164032Srwatson case PRIV_CRED_SETGROUPS: 3721164032Srwatson case PRIV_CRED_SETREUID: 3722164032Srwatson case PRIV_CRED_SETREGID: 3723164032Srwatson case PRIV_CRED_SETRESUID: 3724164032Srwatson case PRIV_CRED_SETRESGID: 3725164032Srwatson 3726164032Srwatson /* 3727164032Srwatson * Jail implements visibility constraints already, so allow 3728164032Srwatson * jailed root to override uid/gid-based constraints. 3729164032Srwatson */ 3730164032Srwatson case PRIV_SEEOTHERGIDS: 3731164032Srwatson case PRIV_SEEOTHERUIDS: 3732164032Srwatson 3733164032Srwatson /* 3734164032Srwatson * Jail implements inter-process debugging limits already, so 3735164032Srwatson * allow jailed root various debugging privileges. 3736164032Srwatson */ 3737164032Srwatson case PRIV_DEBUG_DIFFCRED: 3738164032Srwatson case PRIV_DEBUG_SUGID: 3739164032Srwatson case PRIV_DEBUG_UNPRIV: 3740164032Srwatson 3741164032Srwatson /* 3742164032Srwatson * Allow jail to set various resource limits and login 3743164032Srwatson * properties, and for now, exceed process resource limits. 3744164032Srwatson */ 3745164032Srwatson case PRIV_PROC_LIMIT: 3746164032Srwatson case PRIV_PROC_SETLOGIN: 3747164032Srwatson case PRIV_PROC_SETRLIMIT: 3748164032Srwatson 3749164032Srwatson /* 3750164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3751164032Srwatson */ 3752164032Srwatson case PRIV_IPC_READ: 3753164032Srwatson case PRIV_IPC_WRITE: 3754164032Srwatson case PRIV_IPC_ADMIN: 3755164032Srwatson case PRIV_IPC_MSGSIZE: 3756164032Srwatson case PRIV_MQ_ADMIN: 3757164032Srwatson 3758164032Srwatson /* 3759192895Sjamie * Jail operations within a jail work on child jails. 3760192895Sjamie */ 3761192895Sjamie case PRIV_JAIL_ATTACH: 3762192895Sjamie case PRIV_JAIL_SET: 3763192895Sjamie case PRIV_JAIL_REMOVE: 3764192895Sjamie 3765192895Sjamie /* 3766164032Srwatson * Jail implements its own inter-process limits, so allow 3767164032Srwatson * root processes in jail to change scheduling on other 3768164032Srwatson * processes in the same jail. Likewise for signalling. 3769164032Srwatson */ 3770164032Srwatson case PRIV_SCHED_DIFFCRED: 3771185435Sbz case PRIV_SCHED_CPUSET: 3772164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3773164032Srwatson case PRIV_SIGNAL_SUGID: 3774164032Srwatson 3775164032Srwatson /* 3776164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3777164032Srwatson * writable. 3778164032Srwatson */ 3779164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 3780164032Srwatson 3781164032Srwatson /* 3782164032Srwatson * Allow root in jail to manage a variety of quota 3783166831Srwatson * properties. These should likely be conditional on a 3784166831Srwatson * configuration option. 3785164032Srwatson */ 3786166832Srwatson case PRIV_VFS_GETQUOTA: 3787166832Srwatson case PRIV_VFS_SETQUOTA: 3788164032Srwatson 3789164032Srwatson /* 3790164032Srwatson * Since Jail relies on chroot() to implement file system 3791164032Srwatson * protections, grant many VFS privileges to root in jail. 3792164032Srwatson * Be careful to exclude mount-related and NFS-related 3793164032Srwatson * privileges. 3794164032Srwatson */ 3795164032Srwatson case PRIV_VFS_READ: 3796164032Srwatson case PRIV_VFS_WRITE: 3797164032Srwatson case PRIV_VFS_ADMIN: 3798164032Srwatson case PRIV_VFS_EXEC: 3799164032Srwatson case PRIV_VFS_LOOKUP: 3800164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3801164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 3802164032Srwatson case PRIV_VFS_CHOWN: 3803164032Srwatson case PRIV_VFS_CHROOT: 3804167152Spjd case PRIV_VFS_RETAINSUGID: 3805164032Srwatson case PRIV_VFS_FCHROOT: 3806164032Srwatson case PRIV_VFS_LINK: 3807164032Srwatson case PRIV_VFS_SETGID: 3808172860Srwatson case PRIV_VFS_STAT: 3809164032Srwatson case PRIV_VFS_STICKYFILE: 3810164032Srwatson return (0); 3811164032Srwatson 3812164032Srwatson /* 3813164032Srwatson * Depending on the global setting, allow privilege of 3814164032Srwatson * setting system flags. 3815164032Srwatson */ 3816164032Srwatson case PRIV_VFS_SYSFLAGS: 3817192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3818164032Srwatson return (0); 3819164032Srwatson else 3820164032Srwatson return (EPERM); 3821164032Srwatson 3822164032Srwatson /* 3823168396Spjd * Depending on the global setting, allow privilege of 3824168396Spjd * mounting/unmounting file systems. 3825168396Spjd */ 3826168396Spjd case PRIV_VFS_MOUNT: 3827168396Spjd case PRIV_VFS_UNMOUNT: 3828168396Spjd case PRIV_VFS_MOUNT_NONUSER: 3829168699Spjd case PRIV_VFS_MOUNT_OWNER: 3830192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT) 3831168396Spjd return (0); 3832168396Spjd else 3833168396Spjd return (EPERM); 3834168396Spjd 3835168396Spjd /* 3836168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 3837168591Srwatson * ports. 3838164032Srwatson */ 3839164032Srwatson case PRIV_NETINET_RESERVEDPORT: 3840168591Srwatson case PRIV_NETINET_REUSEPORT: 3841164032Srwatson return (0); 3842164032Srwatson 3843164032Srwatson /* 3844175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 3845175630Sbz */ 3846175630Sbz case PRIV_NETINET_SETHDROPTS: 3847175630Sbz return (0); 3848175630Sbz 3849175630Sbz /* 3850164032Srwatson * Conditionally allow creating raw sockets in jail. 3851164032Srwatson */ 3852164032Srwatson case PRIV_NETINET_RAW: 3853192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3854164032Srwatson return (0); 3855164032Srwatson else 3856164032Srwatson return (EPERM); 3857164032Srwatson 3858164032Srwatson /* 3859164032Srwatson * Since jail implements its own visibility limits on netstat 3860164032Srwatson * sysctls, allow getcred. This allows identd to work in 3861164032Srwatson * jail. 3862164032Srwatson */ 3863164032Srwatson case PRIV_NETINET_GETCRED: 3864164032Srwatson return (0); 3865164032Srwatson 3866164032Srwatson default: 3867164032Srwatson /* 3868164032Srwatson * In all remaining cases, deny the privilege request. This 3869164032Srwatson * includes almost all network privileges, many system 3870164032Srwatson * configuration privileges. 3871164032Srwatson */ 3872164032Srwatson return (EPERM); 3873164032Srwatson } 3874164032Srwatson} 3875164032Srwatson 3876192895Sjamie/* 3877192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 3878192895Sjamie * if it does not directly follow. 3879192895Sjamie */ 3880192895Sjamie 3881192895Sjamiechar * 3882192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 3883192895Sjamie{ 3884192895Sjamie char *name; 3885192895Sjamie 3886192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 3887192895Sjamie if (pr1 == pr2) 3888192895Sjamie return "0"; 3889192895Sjamie name = pr2->pr_name; 3890192895Sjamie if (prison_ischild(pr1, pr2)) { 3891192895Sjamie /* 3892192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 3893192895Sjamie * so its length can't be counted on. But the number of dots 3894192895Sjamie * can be counted on - and counted. 3895192895Sjamie */ 3896192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3897192895Sjamie name = strchr(name, '.') + 1; 3898192895Sjamie } 3899192895Sjamie return (name); 3900192895Sjamie} 3901192895Sjamie 3902192895Sjamie/* 3903192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 3904192895Sjamie * if it does not directly follow. 3905192895Sjamie */ 3906192895Sjamiestatic char * 3907192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 3908192895Sjamie{ 3909192895Sjamie char *path1, *path2; 3910192895Sjamie int len1; 3911192895Sjamie 3912192895Sjamie path1 = pr1->pr_path; 3913192895Sjamie path2 = pr2->pr_path; 3914192895Sjamie if (!strcmp(path1, "/")) 3915192895Sjamie return (path2); 3916192895Sjamie len1 = strlen(path1); 3917192895Sjamie if (strncmp(path1, path2, len1)) 3918192895Sjamie return (path2); 3919192895Sjamie if (path2[len1] == '\0') 3920192895Sjamie return "/"; 3921192895Sjamie if (path2[len1] == '/') 3922192895Sjamie return (path2 + len1); 3923192895Sjamie return (path2); 3924192895Sjamie} 3925192895Sjamie 3926192895Sjamie 3927192895Sjamie/* 3928192895Sjamie * Jail-related sysctls. 3929192895Sjamie */ 3930192895SjamieSYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 3931192895Sjamie "Jails"); 3932192895Sjamie 3933113275Smikestatic int 3934113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 3935113275Smike{ 3936191673Sjamie struct xprison *xp; 3937192895Sjamie struct prison *pr, *cpr; 3938191673Sjamie#ifdef INET 3939191673Sjamie struct in_addr *ip4 = NULL; 3940191673Sjamie int ip4s = 0; 3941191673Sjamie#endif 3942191673Sjamie#ifdef INET6 3943191673Sjamie struct in_addr *ip6 = NULL; 3944191673Sjamie int ip6s = 0; 3945191673Sjamie#endif 3946192895Sjamie int descend, error; 3947113275Smike 3948191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 3949192895Sjamie pr = req->td->td_ucred->cr_prison; 3950191673Sjamie error = 0; 3951168401Spjd sx_slock(&allprison_lock); 3952192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 3953192895Sjamie#if defined(INET) || defined(INET6) 3954191673Sjamie again: 3955192895Sjamie#endif 3956192895Sjamie mtx_lock(&cpr->pr_mtx); 3957185435Sbz#ifdef INET 3958192895Sjamie if (cpr->pr_ip4s > 0) { 3959192895Sjamie if (ip4s < cpr->pr_ip4s) { 3960192895Sjamie ip4s = cpr->pr_ip4s; 3961192895Sjamie mtx_unlock(&cpr->pr_mtx); 3962191673Sjamie ip4 = realloc(ip4, ip4s * 3963191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 3964191673Sjamie goto again; 3965191673Sjamie } 3966192895Sjamie bcopy(cpr->pr_ip4, ip4, 3967192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 3968191673Sjamie } 3969185435Sbz#endif 3970185435Sbz#ifdef INET6 3971192895Sjamie if (cpr->pr_ip6s > 0) { 3972192895Sjamie if (ip6s < cpr->pr_ip6s) { 3973192895Sjamie ip6s = cpr->pr_ip6s; 3974192895Sjamie mtx_unlock(&cpr->pr_mtx); 3975191673Sjamie ip6 = realloc(ip6, ip6s * 3976191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 3977191673Sjamie goto again; 3978191673Sjamie } 3979192895Sjamie bcopy(cpr->pr_ip6, ip6, 3980192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 3981191673Sjamie } 3982185435Sbz#endif 3983192895Sjamie if (cpr->pr_ref == 0) { 3984192895Sjamie mtx_unlock(&cpr->pr_mtx); 3985191673Sjamie continue; 3986191673Sjamie } 3987191673Sjamie bzero(xp, sizeof(*xp)); 3988113275Smike xp->pr_version = XPRISON_VERSION; 3989192895Sjamie xp->pr_id = cpr->pr_id; 3990192895Sjamie xp->pr_state = cpr->pr_uref > 0 3991191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 3992192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 3993194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 3994192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 3995185435Sbz#ifdef INET 3996192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 3997185435Sbz#endif 3998185435Sbz#ifdef INET6 3999192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4000185435Sbz#endif 4001192895Sjamie mtx_unlock(&cpr->pr_mtx); 4002191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4003191673Sjamie if (error) 4004191673Sjamie break; 4005185435Sbz#ifdef INET 4006191673Sjamie if (xp->pr_ip4s > 0) { 4007191673Sjamie error = SYSCTL_OUT(req, ip4, 4008191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4009191673Sjamie if (error) 4010191673Sjamie break; 4011185435Sbz } 4012185435Sbz#endif 4013185435Sbz#ifdef INET6 4014191673Sjamie if (xp->pr_ip6s > 0) { 4015191673Sjamie error = SYSCTL_OUT(req, ip6, 4016191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4017191673Sjamie if (error) 4018191673Sjamie break; 4019185435Sbz } 4020185435Sbz#endif 4021113275Smike } 4022168401Spjd sx_sunlock(&allprison_lock); 4023191673Sjamie free(xp, M_TEMP); 4024191673Sjamie#ifdef INET 4025191673Sjamie free(ip4, M_TEMP); 4026191673Sjamie#endif 4027191673Sjamie#ifdef INET6 4028191673Sjamie free(ip6, M_TEMP); 4029191673Sjamie#endif 4030167354Spjd return (error); 4031113275Smike} 4032113275Smike 4033187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4034187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4035187864Sed sysctl_jail_list, "S", "List of active jails"); 4036126004Spjd 4037126004Spjdstatic int 4038126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4039126004Spjd{ 4040126004Spjd int error, injail; 4041126004Spjd 4042126004Spjd injail = jailed(req->td->td_ucred); 4043126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4044126004Spjd 4045126004Spjd return (error); 4046126004Spjd} 4047192895Sjamie 4048187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4049187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4050187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4051185435Sbz 4052192895Sjamie#if defined(INET) || defined(INET6) 4053193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4054192895Sjamie &jail_max_af_ips, 0, 4055192895Sjamie "Number of IP addresses a jail may have at most per address family"); 4056192895Sjamie#endif 4057192895Sjamie 4058192895Sjamie/* 4059192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 4060192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4061192895Sjamie * just see their own parameters, and can't change them. 4062192895Sjamie */ 4063192895Sjamiestatic int 4064192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4065192895Sjamie{ 4066192895Sjamie struct prison *pr; 4067192895Sjamie int allow, error, i; 4068192895Sjamie 4069192895Sjamie pr = req->td->td_ucred->cr_prison; 4070192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4071192895Sjamie 4072192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4073192895Sjamie i = (allow & arg2) ? 1 : 0; 4074192895Sjamie if (arg1 != NULL) 4075192895Sjamie i = !i; 4076192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4077192895Sjamie if (error || !req->newptr) 4078192895Sjamie return (error); 4079192895Sjamie i = i ? arg2 : 0; 4080192895Sjamie if (arg1 != NULL) 4081192895Sjamie i ^= arg2; 4082192895Sjamie /* 4083192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4084192895Sjamie * for writing. 4085192895Sjamie */ 4086192895Sjamie mtx_lock(&prison0.pr_mtx); 4087192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4088192895Sjamie mtx_unlock(&prison0.pr_mtx); 4089192895Sjamie return (0); 4090192895Sjamie} 4091192895Sjamie 4092192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4093192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4094192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4095192895Sjamie "Processes in jail can set their hostnames"); 4096192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4097192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4098192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4099192895Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only"); 4100192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4101192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4102192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4103192895Sjamie "Processes in jail can use System V IPC primitives"); 4104192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4105192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4106192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4107192895Sjamie "Prison root can create raw sockets"); 4108192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4109192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4110192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4111192895Sjamie "Processes in jail can alter system file flags"); 4112192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4113192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4114192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4115192895Sjamie "Processes in jail can mount/unmount jail-friendly file systems"); 4116192895Sjamie 4117192895Sjamiestatic int 4118192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4119192895Sjamie{ 4120192895Sjamie struct prison *pr; 4121192895Sjamie int level, error; 4122192895Sjamie 4123192895Sjamie pr = req->td->td_ucred->cr_prison; 4124192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4125192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4126192895Sjamie if (error || !req->newptr) 4127192895Sjamie return (error); 4128192895Sjamie *(int *)arg1 = level; 4129192895Sjamie return (0); 4130192895Sjamie} 4131192895Sjamie 4132192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4133192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4134192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4135192895Sjamie sysctl_jail_default_level, "I", 4136192895Sjamie "Processes in jail cannot see all mounted file systems"); 4137192895Sjamie 4138192895Sjamie/* 4139192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4140192895Sjamie * is returned in the string itself, and the other parameters exist merely 4141192895Sjamie * to make themselves and their types known. 4142192895Sjamie */ 4143192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4144192895Sjamie "Jail parameters"); 4145192895Sjamie 4146192895Sjamieint 4147192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4148192895Sjamie{ 4149192895Sjamie int i; 4150192895Sjamie long l; 4151192895Sjamie size_t s; 4152192895Sjamie char numbuf[12]; 4153192895Sjamie 4154192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4155192895Sjamie { 4156192895Sjamie case CTLTYPE_LONG: 4157192895Sjamie case CTLTYPE_ULONG: 4158192895Sjamie l = 0; 4159192895Sjamie#ifdef SCTL_MASK32 4160192895Sjamie if (!(req->flags & SCTL_MASK32)) 4161192895Sjamie#endif 4162192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4163192895Sjamie case CTLTYPE_INT: 4164192895Sjamie case CTLTYPE_UINT: 4165192895Sjamie i = 0; 4166192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4167192895Sjamie case CTLTYPE_STRING: 4168192895Sjamie snprintf(numbuf, sizeof(numbuf), "%d", arg2); 4169192895Sjamie return 4170192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4171192895Sjamie case CTLTYPE_STRUCT: 4172192895Sjamie s = (size_t)arg2; 4173192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4174192895Sjamie } 4175192895Sjamie return (0); 4176192895Sjamie} 4177192895Sjamie 4178192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4179192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4180192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4181192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4182192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4183192895Sjamie "I", "Jail secure level"); 4184192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4185192895Sjamie "I", "Jail cannot see all mounted file systems"); 4186192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4187192895Sjamie "B", "Jail persistence"); 4188194251Sjamie#ifdef VIMAGE 4189194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4190195870Sjamie "E,jailsys", "Virtual network stack"); 4191194251Sjamie#endif 4192192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4193192895Sjamie "B", "Jail is in the process of shutting down"); 4194192895Sjamie 4195194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4196194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4197194762Sjamie "I", "Current number of child jails"); 4198194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4199194762Sjamie "I", "Maximum number of child jails"); 4200194762Sjamie 4201195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4202192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4203192895Sjamie "Jail hostname"); 4204193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4205193066Sjamie "Jail NIS domainname"); 4206193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4207193066Sjamie "Jail host UUID"); 4208193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4209193066Sjamie "LU", "Jail host ID"); 4210192895Sjamie 4211192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4212192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4213192895Sjamie 4214192895Sjamie#ifdef INET 4215195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4216195974Sjamie "Jail IPv4 address virtualization"); 4217192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4218192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4219202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4220202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4221202468Sbz "primary jail IPv4 address."); 4222192895Sjamie#endif 4223192895Sjamie#ifdef INET6 4224195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4225195974Sjamie "Jail IPv6 address virtualization"); 4226192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4227192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4228202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4229202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4230202468Sbz "primary jail IPv6 address."); 4231192895Sjamie#endif 4232192895Sjamie 4233192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4234192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4235192895Sjamie "B", "Jail may set hostname"); 4236192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4237192895Sjamie "B", "Jail may use SYSV IPC"); 4238192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4239192895Sjamie "B", "Jail may create raw sockets"); 4240192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4241192895Sjamie "B", "Jail may alter system file flags"); 4242192895SjamieSYSCTL_JAIL_PARAM(_allow, mount, CTLTYPE_INT | CTLFLAG_RW, 4243192895Sjamie "B", "Jail may mount/unmount jail-friendly file systems"); 4244192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4245192895Sjamie "B", "Jail may set file quotas"); 4246192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4247192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4248192895Sjamie 4249192895Sjamie 4250185435Sbz#ifdef DDB 4251191673Sjamie 4252191673Sjamiestatic void 4253191673Sjamiedb_show_prison(struct prison *pr) 4254185435Sbz{ 4255192895Sjamie int fi; 4256191673Sjamie#if defined(INET) || defined(INET6) 4257191673Sjamie int ii; 4258185435Sbz#endif 4259195870Sjamie unsigned jsf; 4260185435Sbz#ifdef INET6 4261185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4262185435Sbz#endif 4263185435Sbz 4264191673Sjamie db_printf("prison %p:\n", pr); 4265191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4266191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4267192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4268191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4269191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4270191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4271191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4272191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4273194251Sjamie#ifdef VIMAGE 4274194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4275194251Sjamie#endif 4276191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4277191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4278202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4279202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4280192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4281192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4282202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4283192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4284192895Sjamie fi++) 4285192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4286192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4287195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4288195870Sjamie fi++) { 4289195870Sjamie jsf = pr->pr_flags & 4290195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4291195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4292195870Sjamie pr_flag_jailsys[fi].disable && 4293195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4294195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4295195870Sjamie : "inherit"); 4296195870Sjamie } 4297202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4298192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4299192895Sjamie fi++) 4300192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4301192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4302191673Sjamie db_printf("\n"); 4303192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4304194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4305194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4306194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4307193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4308185435Sbz#ifdef INET 4309191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4310191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4311191673Sjamie db_printf(" %s %s\n", 4312202123Sbz ii == 0 ? "ip4.addr =" : " ", 4313191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4314185435Sbz#endif 4315185435Sbz#ifdef INET6 4316191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4317191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4318191673Sjamie db_printf(" %s %s\n", 4319202123Sbz ii == 0 ? "ip6.addr =" : " ", 4320191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4321191673Sjamie#endif 4322191673Sjamie} 4323191673Sjamie 4324191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4325191673Sjamie{ 4326191673Sjamie struct prison *pr; 4327191673Sjamie 4328191673Sjamie if (!have_addr) { 4329192895Sjamie /* 4330192895Sjamie * Show all prisons in the list, and prison0 which is not 4331192895Sjamie * listed. 4332192895Sjamie */ 4333192895Sjamie db_show_prison(&prison0); 4334192895Sjamie if (!db_pager_quit) { 4335192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4336192895Sjamie db_show_prison(pr); 4337192895Sjamie if (db_pager_quit) 4338192895Sjamie break; 4339192895Sjamie } 4340191673Sjamie } 4341191673Sjamie return; 4342191673Sjamie } 4343191673Sjamie 4344192895Sjamie if (addr == 0) 4345192895Sjamie pr = &prison0; 4346192895Sjamie else { 4347192895Sjamie /* Look for a prison with the ID and with references. */ 4348191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4349192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4350191673Sjamie break; 4351192895Sjamie if (pr == NULL) 4352192895Sjamie /* Look again, without requiring a reference. */ 4353192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4354192895Sjamie if (pr->pr_id == addr) 4355192895Sjamie break; 4356192895Sjamie if (pr == NULL) 4357192895Sjamie /* Assume address points to a valid prison. */ 4358192895Sjamie pr = (struct prison *)addr; 4359192895Sjamie } 4360191673Sjamie db_show_prison(pr); 4361185435Sbz} 4362191673Sjamie 4363185435Sbz#endif /* DDB */ 4364