kern_jail.c revision 194915
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 194915 2009-06-24 21:39:50Z jamie $"); 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> 61181803Sbz#include <sys/vimage.h> 6246155Sphk#include <net/if.h> 6346155Sphk#include <netinet/in.h> 64185435Sbz#ifdef DDB 65185435Sbz#include <ddb/ddb.h> 66185435Sbz#ifdef INET6 67185435Sbz#include <netinet6/in6_var.h> 68185435Sbz#endif /* INET6 */ 69185435Sbz#endif /* DDB */ 7046155Sphk 71163606Srwatson#include <security/mac/mac_framework.h> 72163606Srwatson 7346155SphkMALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 7446155Sphk 75192895Sjamie/* prison0 describes what is "real" about the system. */ 76192895Sjamiestruct prison prison0 = { 77192895Sjamie .pr_id = 0, 78192895Sjamie .pr_name = "0", 79192895Sjamie .pr_ref = 1, 80192895Sjamie .pr_uref = 1, 81192895Sjamie .pr_path = "/", 82192895Sjamie .pr_securelevel = -1, 83194762Sjamie .pr_childmax = JAIL_MAX, 84194118Sjamie .pr_hostuuid = "00000000-0000-0000-0000-000000000000", 85192895Sjamie .pr_children = LIST_HEAD_INITIALIZER(&prison0.pr_children), 86193066Sjamie .pr_flags = PR_HOST, 87192895Sjamie .pr_allow = PR_ALLOW_ALL, 88192895Sjamie}; 89192895SjamieMTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); 9057163Srwatson 91192895Sjamie/* allprison and lastprid are protected by allprison_lock. */ 92168401Spjdstruct sx allprison_lock; 93191673SjamieSX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); 94191673Sjamiestruct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); 95179881Sdelphijint lastprid = 0; 96113275Smike 97191673Sjamiestatic int do_jail_attach(struct thread *td, struct prison *pr); 98190466Sjamiestatic void prison_complete(void *context, int pending); 99191673Sjamiestatic void prison_deref(struct prison *pr, int flags); 100192895Sjamiestatic char *prison_path(struct prison *pr1, struct prison *pr2); 101192895Sjamiestatic void prison_remove_one(struct prison *pr); 102185435Sbz#ifdef INET 103190466Sjamiestatic int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 104192895Sjamiestatic int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 105185435Sbz#endif 106185435Sbz#ifdef INET6 107190466Sjamiestatic int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 108192895Sjamiestatic int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 109185435Sbz#endif 110113275Smike 111191673Sjamie/* Flags for prison_deref */ 112191673Sjamie#define PD_DEREF 0x01 113191673Sjamie#define PD_DEUREF 0x02 114191673Sjamie#define PD_LOCKED 0x04 115191673Sjamie#define PD_LIST_SLOCKED 0x08 116191673Sjamie#define PD_LIST_XLOCKED 0x10 117113275Smike 118192895Sjamie/* 119192895Sjamie * Parameter names corresponding to PR_* flag values 120192895Sjamie */ 121192895Sjamiestatic char *pr_flag_names[] = { 122192895Sjamie [0] = "persist", 123193066Sjamie "host", 124185435Sbz#ifdef INET 125193066Sjamie "ip4", 126192895Sjamie#endif 127192895Sjamie#ifdef INET6 128192895Sjamie [3] = "ip6", 129192895Sjamie#endif 130194251Sjamie#ifdef VIMAGE 131194251Sjamie [4] = "vnet", 132194251Sjamie#endif 133192895Sjamie}; 134192895Sjamie 135192895Sjamiestatic char *pr_flag_nonames[] = { 136192895Sjamie [0] = "nopersist", 137193066Sjamie "nohost", 138192895Sjamie#ifdef INET 139193066Sjamie "noip4", 140192895Sjamie#endif 141192895Sjamie#ifdef INET6 142192895Sjamie [3] = "noip6", 143192895Sjamie#endif 144194251Sjamie#ifdef VIMAGE 145194251Sjamie [4] = "novnet", 146194251Sjamie#endif 147192895Sjamie}; 148192895Sjamie 149192895Sjamiestatic char *pr_allow_names[] = { 150192895Sjamie "allow.set_hostname", 151192895Sjamie "allow.sysvipc", 152192895Sjamie "allow.raw_sockets", 153192895Sjamie "allow.chflags", 154192895Sjamie "allow.mount", 155192895Sjamie "allow.quotas", 156192895Sjamie "allow.socket_af", 157192895Sjamie}; 158192895Sjamie 159192895Sjamiestatic char *pr_allow_nonames[] = { 160192895Sjamie "allow.noset_hostname", 161192895Sjamie "allow.nosysvipc", 162192895Sjamie "allow.noraw_sockets", 163192895Sjamie "allow.nochflags", 164192895Sjamie "allow.nomount", 165192895Sjamie "allow.noquotas", 166192895Sjamie "allow.nosocket_af", 167192895Sjamie}; 168192895Sjamie 169192895Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 170192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 171192895Sjamiestatic int jail_default_enforce_statfs = 2; 172192895Sjamie#if defined(INET) || defined(INET6) 173193865Sjamiestatic unsigned jail_max_af_ips = 255; 174192895Sjamie#endif 175192895Sjamie 176192895Sjamie#ifdef INET 177185435Sbzstatic int 178185435Sbzqcmp_v4(const void *ip1, const void *ip2) 179185435Sbz{ 180185435Sbz in_addr_t iaa, iab; 181185435Sbz 182185435Sbz /* 183185435Sbz * We need to compare in HBO here to get the list sorted as expected 184185435Sbz * by the result of the code. Sorting NBO addresses gives you 185185435Sbz * interesting results. If you do not understand, do not try. 186185435Sbz */ 187185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 188185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 189185435Sbz 190185435Sbz /* 191185435Sbz * Do not simply return the difference of the two numbers, the int is 192185435Sbz * not wide enough. 193185435Sbz */ 194185435Sbz if (iaa > iab) 195185435Sbz return (1); 196185435Sbz else if (iaa < iab) 197185435Sbz return (-1); 198185435Sbz else 199185435Sbz return (0); 200185435Sbz} 201185435Sbz#endif 202185435Sbz 203185435Sbz#ifdef INET6 204185435Sbzstatic int 205185435Sbzqcmp_v6(const void *ip1, const void *ip2) 206185435Sbz{ 207185435Sbz const struct in6_addr *ia6a, *ia6b; 208185435Sbz int i, rc; 209185435Sbz 210185435Sbz ia6a = (const struct in6_addr *)ip1; 211185435Sbz ia6b = (const struct in6_addr *)ip2; 212185435Sbz 213185435Sbz rc = 0; 214190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 215185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 216185435Sbz rc = 1; 217185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 218185435Sbz rc = -1; 219185435Sbz } 220185435Sbz return (rc); 221185435Sbz} 222185435Sbz#endif 223185435Sbz 224191673Sjamie/* 225191673Sjamie * struct jail_args { 226191673Sjamie * struct jail *jail; 227191673Sjamie * }; 228191673Sjamie */ 229191673Sjamieint 230191673Sjamiejail(struct thread *td, struct jail_args *uap) 231185435Sbz{ 232191673Sjamie uint32_t version; 233191673Sjamie int error; 234192895Sjamie struct jail j; 235185435Sbz 236191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 237191673Sjamie if (error) 238191673Sjamie return (error); 239185435Sbz 240191673Sjamie switch (version) { 241191673Sjamie case 0: 242191673Sjamie { 243191673Sjamie struct jail_v0 j0; 244185435Sbz 245192895Sjamie /* FreeBSD single IPv4 jails. */ 246192895Sjamie bzero(&j, sizeof(struct jail)); 247191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 248191673Sjamie if (error) 249191673Sjamie return (error); 250192895Sjamie j.version = j0.version; 251192895Sjamie j.path = j0.path; 252192895Sjamie j.hostname = j0.hostname; 253192895Sjamie j.ip4s = j0.ip_number; 254191673Sjamie break; 255191673Sjamie } 256191673Sjamie 257191673Sjamie case 1: 258185435Sbz /* 259191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 260191673Sjamie * that never made it into the official kernel. 261185435Sbz */ 262191673Sjamie return (EINVAL); 263185435Sbz 264191673Sjamie case 2: /* JAIL_API_VERSION */ 265191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 266191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 267191673Sjamie if (error) 268191673Sjamie return (error); 269192895Sjamie break; 270192895Sjamie 271192895Sjamie default: 272192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 273192895Sjamie return (EINVAL); 274192895Sjamie } 275192895Sjamie return (kern_jail(td, &j)); 276192895Sjamie} 277192895Sjamie 278192895Sjamieint 279192895Sjamiekern_jail(struct thread *td, struct jail *j) 280192895Sjamie{ 281193865Sjamie struct iovec optiov[2 * (4 282193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 283193865Sjamie#ifdef INET 284193865Sjamie + 1 285193865Sjamie#endif 286193865Sjamie#ifdef INET6 287193865Sjamie + 1 288193865Sjamie#endif 289193865Sjamie )]; 290192895Sjamie struct uio opt; 291192895Sjamie char *u_path, *u_hostname, *u_name; 292185435Sbz#ifdef INET 293193865Sjamie uint32_t ip4s; 294192895Sjamie struct in_addr *u_ip4; 295192895Sjamie#endif 296192895Sjamie#ifdef INET6 297192895Sjamie struct in6_addr *u_ip6; 298192895Sjamie#endif 299192895Sjamie size_t tmplen; 300192895Sjamie int error, enforce_statfs, fi; 301192895Sjamie 302192895Sjamie bzero(&optiov, sizeof(optiov)); 303192895Sjamie opt.uio_iov = optiov; 304192895Sjamie opt.uio_iovcnt = 0; 305192895Sjamie opt.uio_offset = -1; 306192895Sjamie opt.uio_resid = -1; 307192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 308192895Sjamie opt.uio_rw = UIO_READ; 309192895Sjamie opt.uio_td = td; 310192895Sjamie 311192895Sjamie /* Set permissions for top-level jails from sysctls. */ 312192895Sjamie if (!jailed(td->td_ucred)) { 313192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 314192895Sjamie sizeof(pr_allow_names[0]); fi++) { 315192895Sjamie optiov[opt.uio_iovcnt].iov_base = 316192895Sjamie (jail_default_allow & (1 << fi)) 317192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 318192895Sjamie optiov[opt.uio_iovcnt].iov_len = 319192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 320192895Sjamie opt.uio_iovcnt += 2; 321192895Sjamie } 322192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 323192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 324192895Sjamie opt.uio_iovcnt++; 325192895Sjamie enforce_statfs = jail_default_enforce_statfs; 326192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 327192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 328192895Sjamie opt.uio_iovcnt++; 329192895Sjamie } 330192895Sjamie 331192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 332192895Sjamie#ifdef INET 333192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 334192895Sjamie if (ip4s > jail_max_af_ips) 335192895Sjamie return (EINVAL); 336192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 337191673Sjamie#else 338192895Sjamie if (j->ip4s > 0) 339192895Sjamie return (EINVAL); 340191673Sjamie#endif 341191673Sjamie#ifdef INET6 342192895Sjamie if (j->ip6s > jail_max_af_ips) 343192895Sjamie return (EINVAL); 344192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 345191673Sjamie#else 346192895Sjamie if (j->ip6s > 0) 347192895Sjamie return (EINVAL); 348191673Sjamie#endif 349192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 350192895Sjamie u_hostname = u_path + MAXPATHLEN; 351192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 352191673Sjamie#ifdef INET 353192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 354191673Sjamie#endif 355191673Sjamie#ifdef INET6 356191673Sjamie#ifdef INET 357192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 358191673Sjamie#else 359192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 360191673Sjamie#endif 361191673Sjamie#endif 362192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 363192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 364192895Sjamie opt.uio_iovcnt++; 365192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 366192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 367192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 368192895Sjamie if (error) { 369192895Sjamie free(u_path, M_TEMP); 370192895Sjamie return (error); 371192895Sjamie } 372192895Sjamie opt.uio_iovcnt++; 373192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 374192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 375192895Sjamie opt.uio_iovcnt++; 376192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 377192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 378192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 379192895Sjamie if (error) { 380192895Sjamie free(u_path, M_TEMP); 381192895Sjamie return (error); 382192895Sjamie } 383192895Sjamie opt.uio_iovcnt++; 384192895Sjamie if (j->jailname != NULL) { 385192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 386192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 387192895Sjamie opt.uio_iovcnt++; 388192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 389192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 390192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 391191673Sjamie if (error) { 392191673Sjamie free(u_path, M_TEMP); 393191673Sjamie return (error); 394191673Sjamie } 395192895Sjamie opt.uio_iovcnt++; 396192895Sjamie } 397191673Sjamie#ifdef INET 398192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 399192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 400192895Sjamie opt.uio_iovcnt++; 401192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 402192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 403192895Sjamie if (j->version == 0) 404192895Sjamie u_ip4->s_addr = j->ip4s; 405192895Sjamie else { 406192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 407191673Sjamie if (error) { 408191673Sjamie free(u_path, M_TEMP); 409191673Sjamie return (error); 410191673Sjamie } 411192895Sjamie } 412192895Sjamie opt.uio_iovcnt++; 413185435Sbz#endif 414185435Sbz#ifdef INET6 415192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 416192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 417192895Sjamie opt.uio_iovcnt++; 418192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 419192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 420192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 421192895Sjamie if (error) { 422192895Sjamie free(u_path, M_TEMP); 423192895Sjamie return (error); 424192895Sjamie } 425192895Sjamie opt.uio_iovcnt++; 426185435Sbz#endif 427192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 428192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 429191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 430191673Sjamie free(u_path, M_TEMP); 431191673Sjamie return (error); 432185435Sbz} 433185435Sbz 434192895Sjamie 435191673Sjamie/* 436191673Sjamie * struct jail_set_args { 437191673Sjamie * struct iovec *iovp; 438191673Sjamie * unsigned int iovcnt; 439191673Sjamie * int flags; 440191673Sjamie * }; 441191673Sjamie */ 442191673Sjamieint 443191673Sjamiejail_set(struct thread *td, struct jail_set_args *uap) 444185435Sbz{ 445191673Sjamie struct uio *auio; 446191673Sjamie int error; 447191673Sjamie 448191673Sjamie /* Check that we have an even number of iovecs. */ 449191673Sjamie if (uap->iovcnt & 1) 450191673Sjamie return (EINVAL); 451191673Sjamie 452191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 453191673Sjamie if (error) 454191673Sjamie return (error); 455191673Sjamie error = kern_jail_set(td, auio, uap->flags); 456191673Sjamie free(auio, M_IOV); 457191673Sjamie return (error); 458191673Sjamie} 459191673Sjamie 460191673Sjamieint 461191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 462191673Sjamie{ 463191673Sjamie struct nameidata nd; 464185435Sbz#ifdef INET 465190466Sjamie struct in_addr *ip4; 466185435Sbz#endif 467185435Sbz#ifdef INET6 468185435Sbz struct in6_addr *ip6; 469185435Sbz#endif 470191673Sjamie struct vfsopt *opt; 471191673Sjamie struct vfsoptlist *opts; 472192895Sjamie struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 473191673Sjamie struct vnode *root; 474193066Sjamie char *domain, *errmsg, *host, *name, *p, *path, *uuid; 475192895Sjamie#if defined(INET) || defined(INET6) 476191673Sjamie void *op; 477192895Sjamie#endif 478193066Sjamie unsigned long hid; 479192895Sjamie size_t namelen, onamelen; 480192895Sjamie int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 481194762Sjamie int gotchildmax, gotenforce, gothid, gotslevel, fi, jid, len, level; 482194762Sjamie int childmax, slevel, vfslocked; 483191673Sjamie#if defined(INET) || defined(INET6) 484192895Sjamie int ii, ij; 485191673Sjamie#endif 486191673Sjamie#ifdef INET 487192895Sjamie int ip4s, ip4a, redo_ip4; 488191673Sjamie#endif 489191673Sjamie#ifdef INET6 490192895Sjamie int ip6s, ip6a, redo_ip6; 491191673Sjamie#endif 492191673Sjamie unsigned pr_flags, ch_flags; 493192895Sjamie unsigned pr_allow, ch_allow, tallow; 494191673Sjamie char numbuf[12]; 495185435Sbz 496191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 497191673Sjamie if (!error && (flags & JAIL_ATTACH)) 498191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 499191673Sjamie if (error) 500191673Sjamie return (error); 501192895Sjamie mypr = ppr = td->td_ucred->cr_prison; 502194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 503192895Sjamie return (EPERM); 504191673Sjamie if (flags & ~JAIL_SET_MASK) 505191673Sjamie return (EINVAL); 506191673Sjamie 507185435Sbz /* 508191673Sjamie * Check all the parameters before committing to anything. Not all 509191673Sjamie * errors can be caught early, but we may as well try. Also, this 510191673Sjamie * takes care of some expensive stuff (path lookup) before getting 511191673Sjamie * the allprison lock. 512185435Sbz * 513191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 514191673Sjamie * options. But it makes more sense to re-use the vfsopt code 515191673Sjamie * than duplicate it under a different name. 516185435Sbz */ 517191673Sjamie error = vfs_buildopts(optuio, &opts); 518191673Sjamie if (error) 519191673Sjamie return (error); 520185435Sbz#ifdef INET 521192895Sjamie ip4a = 0; 522185435Sbz ip4 = NULL; 523185435Sbz#endif 524185435Sbz#ifdef INET6 525192895Sjamie ip6a = 0; 526185435Sbz ip6 = NULL; 527185435Sbz#endif 528191673Sjamie 529192895Sjamie#if defined(INET) || defined(INET6) 530192895Sjamie again: 531192895Sjamie#endif 532191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 533191673Sjamie if (error == ENOENT) 534191673Sjamie jid = 0; 535191673Sjamie else if (error != 0) 536191673Sjamie goto done_free; 537191673Sjamie 538191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 539191673Sjamie if (error == ENOENT) 540191673Sjamie gotslevel = 0; 541191673Sjamie else if (error != 0) 542191673Sjamie goto done_free; 543191673Sjamie else 544191673Sjamie gotslevel = 1; 545191673Sjamie 546194762Sjamie error = 547194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 548194762Sjamie if (error == ENOENT) 549194762Sjamie gotchildmax = 0; 550194762Sjamie else if (error != 0) 551194762Sjamie goto done_free; 552194762Sjamie else 553194762Sjamie gotchildmax = 1; 554194762Sjamie 555192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 556192895Sjamie gotenforce = (error == 0); 557192895Sjamie if (gotenforce) { 558192895Sjamie if (enforce < 0 || enforce > 2) 559192895Sjamie return (EINVAL); 560192895Sjamie } else if (error != ENOENT) 561192895Sjamie goto done_free; 562192895Sjamie 563191673Sjamie pr_flags = ch_flags = 0; 564192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 565192895Sjamie fi++) { 566192895Sjamie if (pr_flag_names[fi] == NULL) 567192895Sjamie continue; 568192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 569192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 570192895Sjamie } 571191673Sjamie ch_flags |= pr_flags; 572191673Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 573191673Sjamie && !(pr_flags & PR_PERSIST)) { 574191673Sjamie error = EINVAL; 575191673Sjamie vfs_opterror(opts, "new jail must persist or attach"); 576191673Sjamie goto done_errmsg; 577191673Sjamie } 578194251Sjamie#ifdef VIMAGE 579194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 580194251Sjamie error = EINVAL; 581194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 582194251Sjamie goto done_errmsg; 583194251Sjamie } 584194251Sjamie#endif 585191673Sjamie 586192895Sjamie pr_allow = ch_allow = 0; 587192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 588192895Sjamie fi++) { 589192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 590192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 591192895Sjamie } 592192895Sjamie ch_allow |= pr_allow; 593192895Sjamie 594191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 595191673Sjamie if (error == ENOENT) 596191673Sjamie name = NULL; 597191673Sjamie else if (error != 0) 598191673Sjamie goto done_free; 599191673Sjamie else { 600191673Sjamie if (len == 0 || name[len - 1] != '\0') { 601191673Sjamie error = EINVAL; 602191673Sjamie goto done_free; 603191673Sjamie } 604191673Sjamie if (len > MAXHOSTNAMELEN) { 605191673Sjamie error = ENAMETOOLONG; 606191673Sjamie goto done_free; 607191673Sjamie } 608191673Sjamie } 609191673Sjamie 610191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 611191673Sjamie if (error == ENOENT) 612191673Sjamie host = NULL; 613191673Sjamie else if (error != 0) 614191673Sjamie goto done_free; 615191673Sjamie else { 616193066Sjamie ch_flags |= PR_HOST; 617193066Sjamie pr_flags |= PR_HOST; 618191673Sjamie if (len == 0 || host[len - 1] != '\0') { 619191673Sjamie error = EINVAL; 620191673Sjamie goto done_free; 621191673Sjamie } 622191673Sjamie if (len > MAXHOSTNAMELEN) { 623191673Sjamie error = ENAMETOOLONG; 624191673Sjamie goto done_free; 625191673Sjamie } 626191673Sjamie } 627191673Sjamie 628193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 629193066Sjamie if (error == ENOENT) 630193066Sjamie domain = NULL; 631193066Sjamie else if (error != 0) 632193066Sjamie goto done_free; 633193066Sjamie else { 634193066Sjamie ch_flags |= PR_HOST; 635193066Sjamie pr_flags |= PR_HOST; 636193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 637193066Sjamie error = EINVAL; 638193066Sjamie goto done_free; 639193066Sjamie } 640193066Sjamie if (len > MAXHOSTNAMELEN) { 641193066Sjamie error = ENAMETOOLONG; 642193066Sjamie goto done_free; 643193066Sjamie } 644193066Sjamie } 645193066Sjamie 646193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 647193066Sjamie if (error == ENOENT) 648193066Sjamie uuid = NULL; 649193066Sjamie else if (error != 0) 650193066Sjamie goto done_free; 651193066Sjamie else { 652193066Sjamie ch_flags |= PR_HOST; 653193066Sjamie pr_flags |= PR_HOST; 654193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 655193066Sjamie error = EINVAL; 656193066Sjamie goto done_free; 657193066Sjamie } 658193066Sjamie if (len > HOSTUUIDLEN) { 659193066Sjamie error = ENAMETOOLONG; 660193066Sjamie goto done_free; 661193066Sjamie } 662193066Sjamie } 663193066Sjamie 664193066Sjamie#ifdef COMPAT_IA32 665193066Sjamie if (td->td_proc->p_sysent->sv_flags & SV_IA32) { 666193066Sjamie uint32_t hid32; 667193066Sjamie 668193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 669193066Sjamie hid = hid32; 670193066Sjamie } else 671193066Sjamie#endif 672193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 673193066Sjamie if (error == ENOENT) 674193066Sjamie gothid = 0; 675193066Sjamie else if (error != 0) 676193066Sjamie goto done_free; 677193066Sjamie else { 678193066Sjamie gothid = 1; 679193066Sjamie ch_flags |= PR_HOST; 680193066Sjamie pr_flags |= PR_HOST; 681193066Sjamie } 682193066Sjamie 683192895Sjamie /* This might be the second time around for this option. */ 684185435Sbz#ifdef INET 685191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 686191673Sjamie if (error == ENOENT) 687191673Sjamie ip4s = -1; 688191673Sjamie else if (error != 0) 689191673Sjamie goto done_free; 690191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 691191673Sjamie error = EINVAL; 692191673Sjamie goto done_free; 693192895Sjamie } else { 694192895Sjamie ch_flags |= PR_IP4_USER; 695192895Sjamie pr_flags |= PR_IP4_USER; 696192895Sjamie if (ip4s > 0) { 697192895Sjamie ip4s /= sizeof(*ip4); 698192895Sjamie if (ip4s > jail_max_af_ips) { 699185435Sbz error = EINVAL; 700192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 701192895Sjamie goto done_errmsg; 702185435Sbz } 703192895Sjamie if (ip4a < ip4s) { 704192895Sjamie ip4a = ip4s; 705192895Sjamie free(ip4, M_PRISON); 706192895Sjamie ip4 = NULL; 707185435Sbz } 708192895Sjamie if (ip4 == NULL) 709192895Sjamie ip4 = malloc(ip4a * sizeof(*ip4), M_PRISON, 710192895Sjamie M_WAITOK); 711192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 712192895Sjamie /* 713192895Sjamie * IP addresses are all sorted but ip[0] to preserve 714192895Sjamie * the primary IP address as given from userland. 715192895Sjamie * This special IP is used for unbound outgoing 716192895Sjamie * connections as well for "loopback" traffic. 717192895Sjamie */ 718192895Sjamie if (ip4s > 1) 719192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 720192895Sjamie /* 721192895Sjamie * Check for duplicate addresses and do some simple 722192895Sjamie * zero and broadcast checks. If users give other bogus 723192895Sjamie * addresses it is their problem. 724192895Sjamie * 725192895Sjamie * We do not have to care about byte order for these 726192895Sjamie * checks so we will do them in NBO. 727192895Sjamie */ 728192895Sjamie for (ii = 0; ii < ip4s; ii++) { 729192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 730192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 731192895Sjamie error = EINVAL; 732192895Sjamie goto done_free; 733192895Sjamie } 734192895Sjamie if ((ii+1) < ip4s && 735192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 736192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 737192895Sjamie error = EINVAL; 738192895Sjamie goto done_free; 739192895Sjamie } 740192895Sjamie } 741185435Sbz } 742191673Sjamie } 743191673Sjamie#endif 744185435Sbz 745185435Sbz#ifdef INET6 746191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 747191673Sjamie if (error == ENOENT) 748191673Sjamie ip6s = -1; 749191673Sjamie else if (error != 0) 750191673Sjamie goto done_free; 751191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 752191673Sjamie error = EINVAL; 753191673Sjamie goto done_free; 754192895Sjamie } else { 755192895Sjamie ch_flags |= PR_IP6_USER; 756192895Sjamie pr_flags |= PR_IP6_USER; 757192895Sjamie if (ip6s > 0) { 758192895Sjamie ip6s /= sizeof(*ip6); 759192895Sjamie if (ip6s > jail_max_af_ips) { 760185435Sbz error = EINVAL; 761192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 762192895Sjamie goto done_errmsg; 763185435Sbz } 764192895Sjamie if (ip6a < ip6s) { 765192895Sjamie ip6a = ip6s; 766192895Sjamie free(ip6, M_PRISON); 767192895Sjamie ip6 = NULL; 768185435Sbz } 769192895Sjamie if (ip6 == NULL) 770192895Sjamie ip6 = malloc(ip6a * sizeof(*ip6), M_PRISON, 771192895Sjamie M_WAITOK); 772192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 773192895Sjamie if (ip6s > 1) 774192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 775192895Sjamie for (ii = 0; ii < ip6s; ii++) { 776192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 777192895Sjamie error = EINVAL; 778192895Sjamie goto done_free; 779192895Sjamie } 780192895Sjamie if ((ii+1) < ip6s && 781192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 782192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 783192895Sjamie { 784192895Sjamie error = EINVAL; 785192895Sjamie goto done_free; 786192895Sjamie } 787192895Sjamie } 788185435Sbz } 789191673Sjamie } 790185435Sbz#endif 791185435Sbz 792191673Sjamie root = NULL; 793191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 794191673Sjamie if (error == ENOENT) 795191673Sjamie path = NULL; 796191673Sjamie else if (error != 0) 797191673Sjamie goto done_free; 798191673Sjamie else { 799191673Sjamie if (flags & JAIL_UPDATE) { 800191673Sjamie error = EINVAL; 801191673Sjamie vfs_opterror(opts, 802191673Sjamie "path cannot be changed after creation"); 803191673Sjamie goto done_errmsg; 804191673Sjamie } 805191673Sjamie if (len == 0 || path[len - 1] != '\0') { 806191673Sjamie error = EINVAL; 807191673Sjamie goto done_free; 808191673Sjamie } 809191673Sjamie if (len < 2 || (len == 2 && path[0] == '/')) 810191673Sjamie path = NULL; 811191673Sjamie else { 812192895Sjamie /* Leave room for a real-root full pathname. */ 813192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 814192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 815192895Sjamie error = ENAMETOOLONG; 816192895Sjamie goto done_free; 817192895Sjamie } 818191673Sjamie NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW, UIO_SYSSPACE, 819191673Sjamie path, td); 820191673Sjamie error = namei(&nd); 821191673Sjamie if (error) 822191673Sjamie goto done_free; 823191673Sjamie vfslocked = NDHASGIANT(&nd); 824191673Sjamie root = nd.ni_vp; 825191673Sjamie NDFREE(&nd, NDF_ONLY_PNBUF); 826191673Sjamie if (root->v_type != VDIR) { 827191673Sjamie error = ENOTDIR; 828191673Sjamie vrele(root); 829191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 830191673Sjamie goto done_free; 831191673Sjamie } 832191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 833191673Sjamie } 834191673Sjamie } 835185435Sbz 836191673Sjamie /* 837191673Sjamie * Grab the allprison lock before letting modules check their 838191673Sjamie * parameters. Once we have it, do not let go so we'll have a 839191673Sjamie * consistent view of the OSD list. 840191673Sjamie */ 841191673Sjamie sx_xlock(&allprison_lock); 842191673Sjamie error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 843191673Sjamie if (error) 844191673Sjamie goto done_unlock_list; 845185435Sbz 846191673Sjamie /* By now, all parameters should have been noted. */ 847191673Sjamie TAILQ_FOREACH(opt, opts, link) { 848191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 849191673Sjamie error = EINVAL; 850191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 851191673Sjamie goto done_unlock_list; 852191673Sjamie } 853191673Sjamie } 854191673Sjamie 855185435Sbz /* 856191673Sjamie * See if we are creating a new record or updating an existing one. 857191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 858185435Sbz */ 859191673Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 860191673Sjamie if (!cuflags) { 861191673Sjamie error = EINVAL; 862191673Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 863191673Sjamie goto done_unlock_list; 864191673Sjamie } 865191673Sjamie pr = NULL; 866191673Sjamie if (jid != 0) { 867192895Sjamie /* 868192895Sjamie * See if a requested jid already exists. There is an 869192895Sjamie * information leak here if the jid exists but is not within 870192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 871192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 872192895Sjamie * will return ENOENT which is not normally a valid error. 873192895Sjamie */ 874191673Sjamie if (jid < 0) { 875191673Sjamie error = EINVAL; 876191673Sjamie vfs_opterror(opts, "negative jid"); 877191673Sjamie goto done_unlock_list; 878191673Sjamie } 879191673Sjamie pr = prison_find(jid); 880191673Sjamie if (pr != NULL) { 881192895Sjamie ppr = pr->pr_parent; 882191673Sjamie /* Create: jid must not exist. */ 883191673Sjamie if (cuflags == JAIL_CREATE) { 884191673Sjamie mtx_unlock(&pr->pr_mtx); 885191673Sjamie error = EEXIST; 886191673Sjamie vfs_opterror(opts, "jail %d already exists", 887191673Sjamie jid); 888191673Sjamie goto done_unlock_list; 889191673Sjamie } 890192895Sjamie if (!prison_ischild(mypr, pr)) { 891192895Sjamie mtx_unlock(&pr->pr_mtx); 892192895Sjamie pr = NULL; 893192895Sjamie } else if (pr->pr_uref == 0) { 894191673Sjamie if (!(flags & JAIL_DYING)) { 895191673Sjamie mtx_unlock(&pr->pr_mtx); 896191673Sjamie error = ENOENT; 897191673Sjamie vfs_opterror(opts, "jail %d is dying", 898191673Sjamie jid); 899191673Sjamie goto done_unlock_list; 900191673Sjamie } else if ((flags & JAIL_ATTACH) || 901191673Sjamie (pr_flags & PR_PERSIST)) { 902191673Sjamie /* 903191673Sjamie * A dying jail might be resurrected 904191673Sjamie * (via attach or persist), but first 905191673Sjamie * it must determine if another jail 906191673Sjamie * has claimed its name. Accomplish 907191673Sjamie * this by implicitly re-setting the 908191673Sjamie * name. 909191673Sjamie */ 910191673Sjamie if (name == NULL) 911192895Sjamie name = prison_name(mypr, pr); 912191673Sjamie } 913191673Sjamie } 914191673Sjamie } 915191673Sjamie if (pr == NULL) { 916191673Sjamie /* Update: jid must exist. */ 917191673Sjamie if (cuflags == JAIL_UPDATE) { 918191673Sjamie error = ENOENT; 919191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 920191673Sjamie goto done_unlock_list; 921191673Sjamie } 922191673Sjamie } 923191673Sjamie } 924191673Sjamie /* 925191673Sjamie * If the caller provided a name, look for a jail by that name. 926191673Sjamie * This has different semantics for creates and updates keyed by jid 927191673Sjamie * (where the name must not already exist in a different jail), 928191673Sjamie * and updates keyed by the name itself (where the name must exist 929191673Sjamie * because that is the jail being updated). 930191673Sjamie */ 931191673Sjamie if (name != NULL) { 932192895Sjamie p = strrchr(name, '.'); 933192895Sjamie if (p != NULL) { 934192895Sjamie /* 935192895Sjamie * This is a hierarchical name. Split it into the 936192895Sjamie * parent and child names, and make sure the parent 937192895Sjamie * exists or matches an already found jail. 938192895Sjamie */ 939192895Sjamie *p = '\0'; 940192895Sjamie if (pr != NULL) { 941192895Sjamie if (strncmp(name, ppr->pr_name, p - name) || 942192895Sjamie ppr->pr_name[p - name] != '\0') { 943192895Sjamie mtx_unlock(&pr->pr_mtx); 944192895Sjamie error = EINVAL; 945192895Sjamie vfs_opterror(opts, 946192895Sjamie "cannot change jail's parent"); 947192895Sjamie goto done_unlock_list; 948192895Sjamie } 949192895Sjamie } else { 950192895Sjamie ppr = prison_find_name(mypr, name); 951192895Sjamie if (ppr == NULL) { 952192895Sjamie error = ENOENT; 953192895Sjamie vfs_opterror(opts, 954192895Sjamie "jail \"%s\" not found", name); 955192895Sjamie goto done_unlock_list; 956192895Sjamie } 957192895Sjamie mtx_unlock(&ppr->pr_mtx); 958192895Sjamie } 959192895Sjamie name = p + 1; 960192895Sjamie } 961191673Sjamie if (name[0] != '\0') { 962192895Sjamie namelen = 963192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 964192895Sjamie name_again: 965191673Sjamie deadpr = NULL; 966192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 967191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 968192895Sjamie !strcmp(tpr->pr_name + namelen, name)) { 969191673Sjamie if (pr == NULL && 970191673Sjamie cuflags != JAIL_CREATE) { 971191673Sjamie mtx_lock(&tpr->pr_mtx); 972191673Sjamie if (tpr->pr_ref > 0) { 973191673Sjamie /* 974191673Sjamie * Use this jail 975191673Sjamie * for updates. 976191673Sjamie */ 977191673Sjamie if (tpr->pr_uref > 0) { 978191673Sjamie pr = tpr; 979191673Sjamie break; 980191673Sjamie } 981191673Sjamie deadpr = tpr; 982191673Sjamie } 983191673Sjamie mtx_unlock(&tpr->pr_mtx); 984191673Sjamie } else if (tpr->pr_uref > 0) { 985191673Sjamie /* 986191673Sjamie * Create, or update(jid): 987191673Sjamie * name must not exist in an 988192895Sjamie * active sibling jail. 989191673Sjamie */ 990191673Sjamie error = EEXIST; 991191673Sjamie if (pr != NULL) 992191673Sjamie mtx_unlock(&pr->pr_mtx); 993191673Sjamie vfs_opterror(opts, 994191673Sjamie "jail \"%s\" already exists", 995191673Sjamie name); 996191673Sjamie goto done_unlock_list; 997191673Sjamie } 998191673Sjamie } 999191673Sjamie } 1000191673Sjamie /* If no active jail is found, use a dying one. */ 1001191673Sjamie if (deadpr != NULL && pr == NULL) { 1002191673Sjamie if (flags & JAIL_DYING) { 1003191673Sjamie mtx_lock(&deadpr->pr_mtx); 1004191673Sjamie if (deadpr->pr_ref == 0) { 1005191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1006191673Sjamie goto name_again; 1007191673Sjamie } 1008191673Sjamie pr = deadpr; 1009191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1010191673Sjamie error = ENOENT; 1011191673Sjamie vfs_opterror(opts, 1012191673Sjamie "jail \"%s\" is dying", name); 1013191673Sjamie goto done_unlock_list; 1014191673Sjamie } 1015191673Sjamie } 1016191673Sjamie /* Update: name must exist if no jid. */ 1017191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1018191673Sjamie error = ENOENT; 1019191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1020191673Sjamie name); 1021191673Sjamie goto done_unlock_list; 1022191673Sjamie } 1023191673Sjamie } 1024191673Sjamie } 1025191673Sjamie /* Update: must provide a jid or name. */ 1026191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1027191673Sjamie error = ENOENT; 1028191673Sjamie vfs_opterror(opts, "update specified no jail"); 1029191673Sjamie goto done_unlock_list; 1030191673Sjamie } 1031185435Sbz 1032191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1033191673Sjamie if (pr == NULL) { 1034194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1035194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1036194762Sjamie error = EPERM; 1037194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1038194762Sjamie goto done_unlock_list; 1039194762Sjamie } 1040191673Sjamie created = 1; 1041192895Sjamie mtx_lock(&ppr->pr_mtx); 1042192895Sjamie if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1043192895Sjamie mtx_unlock(&ppr->pr_mtx); 1044192895Sjamie error = ENOENT; 1045192895Sjamie vfs_opterror(opts, "parent jail went away!"); 1046192895Sjamie goto done_unlock_list; 1047192895Sjamie } 1048192895Sjamie ppr->pr_ref++; 1049192895Sjamie ppr->pr_uref++; 1050192895Sjamie mtx_unlock(&ppr->pr_mtx); 1051191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1052191673Sjamie if (jid == 0) { 1053191673Sjamie /* Find the next free jid. */ 1054191673Sjamie jid = lastprid + 1; 1055191673Sjamie findnext: 1056191673Sjamie if (jid == JAIL_MAX) 1057191673Sjamie jid = 1; 1058191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1059191673Sjamie if (tpr->pr_id < jid) 1060191673Sjamie continue; 1061191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1062191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1063191673Sjamie break; 1064191673Sjamie } 1065191673Sjamie if (jid == lastprid) { 1066191673Sjamie error = EAGAIN; 1067191673Sjamie vfs_opterror(opts, 1068191673Sjamie "no available jail IDs"); 1069191673Sjamie free(pr, M_PRISON); 1070192895Sjamie prison_deref(ppr, PD_DEREF | 1071192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1072192895Sjamie goto done_releroot; 1073191673Sjamie } 1074191673Sjamie jid++; 1075191673Sjamie goto findnext; 1076191673Sjamie } 1077191673Sjamie lastprid = jid; 1078191673Sjamie } else { 1079191673Sjamie /* 1080191673Sjamie * The jail already has a jid (that did not yet exist), 1081191673Sjamie * so just find where to insert it. 1082191673Sjamie */ 1083191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1084191673Sjamie if (tpr->pr_id >= jid) { 1085191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1086191673Sjamie break; 1087191673Sjamie } 1088191673Sjamie } 1089191673Sjamie if (tpr == NULL) 1090191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1091192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1092192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1093194762Sjamie tpr->pr_childcount++; 1094185435Sbz 1095192895Sjamie pr->pr_parent = ppr; 1096191673Sjamie pr->pr_id = jid; 1097192895Sjamie 1098192895Sjamie /* Set some default values, and inherit some from the parent. */ 1099191673Sjamie if (name == NULL) 1100191673Sjamie name = ""; 1101193066Sjamie if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1102193066Sjamie if (host == NULL) 1103194118Sjamie host = ppr->pr_hostname; 1104193066Sjamie if (domain == NULL) 1105194118Sjamie domain = ppr->pr_domainname; 1106193066Sjamie if (uuid == NULL) 1107194118Sjamie uuid = ppr->pr_hostuuid; 1108193066Sjamie if (!gothid) 1109193066Sjamie hid = ppr->pr_hostid; 1110193066Sjamie } 1111191673Sjamie if (path == NULL) { 1112191673Sjamie path = "/"; 1113192895Sjamie root = mypr->pr_root; 1114191673Sjamie vref(root); 1115191673Sjamie } 1116192895Sjamie#ifdef INET 1117192895Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1118192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1119192895Sjamie if (ppr->pr_ip4 != NULL) { 1120192895Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1121192895Sjamie sizeof(struct in_addr), M_PRISON, M_WAITOK); 1122192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1123192895Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1124192895Sjamie } 1125192895Sjamie#endif 1126192895Sjamie#ifdef INET6 1127192895Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1128192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1129192895Sjamie if (ppr->pr_ip6 != NULL) { 1130192895Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1131192895Sjamie sizeof(struct in6_addr), M_PRISON, M_WAITOK); 1132192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1133192895Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1134192895Sjamie } 1135192895Sjamie#endif 1136192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1137192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1138192895Sjamie pr->pr_enforce_statfs = ppr->pr_enforce_statfs; 1139191673Sjamie 1140192895Sjamie LIST_INIT(&pr->pr_children); 1141192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1142191673Sjamie 1143194251Sjamie#ifdef VIMAGE 1144194251Sjamie /* Allocate a new vnet if specified. */ 1145194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1146194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1147194251Sjamie#endif 1148185435Sbz /* 1149191673Sjamie * Allocate a dedicated cpuset for each jail. 1150191673Sjamie * Unlike other initial settings, this may return an erorr. 1151185435Sbz */ 1152192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1153191673Sjamie if (error) { 1154191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1155191673Sjamie goto done_releroot; 1156191673Sjamie } 1157185435Sbz 1158191673Sjamie mtx_lock(&pr->pr_mtx); 1159185435Sbz /* 1160191673Sjamie * New prisons do not yet have a reference, because we do not 1161191673Sjamie * want other to see the incomplete prison once the 1162191673Sjamie * allprison_lock is downgraded. 1163185435Sbz */ 1164191673Sjamie } else { 1165191673Sjamie created = 0; 1166191673Sjamie /* 1167191673Sjamie * Grab a reference for existing prisons, to ensure they 1168191673Sjamie * continue to exist for the duration of the call. 1169191673Sjamie */ 1170191673Sjamie pr->pr_ref++; 1171191673Sjamie } 1172185435Sbz 1173191673Sjamie /* Do final error checking before setting anything. */ 1174192895Sjamie if (gotslevel) { 1175192895Sjamie if (slevel < ppr->pr_securelevel) { 1176192895Sjamie error = EPERM; 1177192895Sjamie goto done_deref_locked; 1178192895Sjamie } 1179192895Sjamie } 1180194762Sjamie if (gotchildmax) { 1181194762Sjamie if (childmax >= ppr->pr_childmax) { 1182194762Sjamie error = EPERM; 1183194762Sjamie goto done_deref_locked; 1184194762Sjamie } 1185194762Sjamie } 1186192895Sjamie if (gotenforce) { 1187192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1188192895Sjamie error = EPERM; 1189192895Sjamie goto done_deref_locked; 1190192895Sjamie } 1191192895Sjamie } 1192185435Sbz#ifdef INET 1193192895Sjamie if (ch_flags & PR_IP4_USER) { 1194192895Sjamie if (ppr->pr_flags & PR_IP4) { 1195192895Sjamie if (!(pr_flags & PR_IP4_USER)) { 1196192895Sjamie /* 1197192895Sjamie * Silently ignore attempts to make the IP 1198192895Sjamie * addresses unrestricted when the parent is 1199192895Sjamie * restricted; in other words, interpret 1200192895Sjamie * "unrestricted" as "as unrestricted as 1201192895Sjamie * possible". 1202192895Sjamie */ 1203192895Sjamie ip4s = ppr->pr_ip4s; 1204192895Sjamie if (ip4s == 0) { 1205192895Sjamie free(ip4, M_PRISON); 1206192895Sjamie ip4 = NULL; 1207192895Sjamie } else if (ip4s <= ip4a) { 1208192895Sjamie /* Inherit the parent's address(es). */ 1209192895Sjamie bcopy(ppr->pr_ip4, ip4, 1210192895Sjamie ip4s * sizeof(*ip4)); 1211192895Sjamie } else { 1212192895Sjamie /* 1213192895Sjamie * There's no room for the parent's 1214192895Sjamie * address list. Allocate some more. 1215192895Sjamie */ 1216192895Sjamie ip4a = ip4s; 1217192895Sjamie free(ip4, M_PRISON); 1218192895Sjamie ip4 = malloc(ip4a * sizeof(*ip4), 1219192895Sjamie M_PRISON, M_NOWAIT); 1220192895Sjamie if (ip4 != NULL) 1221192895Sjamie bcopy(ppr->pr_ip4, ip4, 1222192895Sjamie ip4s * sizeof(*ip4)); 1223192895Sjamie else { 1224192895Sjamie /* Allocation failed without 1225192895Sjamie * sleeping. Unlocking the 1226192895Sjamie * prison now will invalidate 1227192895Sjamie * some checks and prematurely 1228192895Sjamie * show an unfinished new jail. 1229192895Sjamie * So let go of everything and 1230192895Sjamie * start over. 1231192895Sjamie */ 1232192895Sjamie prison_deref(pr, created 1233192895Sjamie ? PD_LOCKED | 1234192895Sjamie PD_LIST_XLOCKED 1235192895Sjamie : PD_DEREF | PD_LOCKED | 1236192895Sjamie PD_LIST_XLOCKED); 1237192895Sjamie if (root != NULL) { 1238192895Sjamie vfslocked = 1239192895Sjamie VFS_LOCK_GIANT( 1240192895Sjamie root->v_mount); 1241192895Sjamie vrele(root); 1242192895Sjamie VFS_UNLOCK_GIANT( 1243192895Sjamie vfslocked); 1244192895Sjamie } 1245192895Sjamie ip4 = malloc(ip4a * 1246192895Sjamie sizeof(*ip4), M_PRISON, 1247192895Sjamie M_WAITOK); 1248192895Sjamie goto again; 1249192895Sjamie } 1250192895Sjamie } 1251192895Sjamie } else if (ip4s > 0) { 1252192895Sjamie /* 1253192895Sjamie * Make sure the new set of IP addresses is a 1254192895Sjamie * subset of the parent's list. Don't worry 1255192895Sjamie * about the parent being unlocked, as any 1256192895Sjamie * setting is done with allprison_lock held. 1257192895Sjamie */ 1258192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1259192895Sjamie if (ip4[0].s_addr == 1260192895Sjamie ppr->pr_ip4[ij].s_addr) 1261192895Sjamie break; 1262192895Sjamie if (ij == ppr->pr_ip4s) { 1263192895Sjamie error = EPERM; 1264192895Sjamie goto done_deref_locked; 1265192895Sjamie } 1266192895Sjamie if (ip4s > 1) { 1267192895Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1268192895Sjamie if (ip4[ii].s_addr == 1269192895Sjamie ppr->pr_ip4[0].s_addr) 1270192895Sjamie continue; 1271192895Sjamie for (; ij < ppr->pr_ip4s; ij++) 1272192895Sjamie if (ip4[ii].s_addr == 1273192895Sjamie ppr->pr_ip4[ij].s_addr) 1274192895Sjamie break; 1275192895Sjamie if (ij == ppr->pr_ip4s) 1276192895Sjamie break; 1277192895Sjamie } 1278192895Sjamie if (ij == ppr->pr_ip4s) { 1279192895Sjamie error = EPERM; 1280192895Sjamie goto done_deref_locked; 1281192895Sjamie } 1282192895Sjamie } 1283192895Sjamie } 1284192895Sjamie } 1285192895Sjamie if (ip4s > 0) { 1286192895Sjamie /* 1287192895Sjamie * Check for conflicting IP addresses. We permit them 1288192895Sjamie * if there is no more than one IP on each jail. If 1289192895Sjamie * there is a duplicate on a jail with more than one 1290192895Sjamie * IP stop checking and return error. 1291192895Sjamie */ 1292192895Sjamie FOREACH_PRISON_DESCENDANT(&prison0, tpr, descend) { 1293192895Sjamie if (tpr == pr || tpr->pr_uref == 0) { 1294192895Sjamie descend = 0; 1295192895Sjamie continue; 1296192895Sjamie } 1297192895Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1298192895Sjamie continue; 1299192895Sjamie descend = 0; 1300192895Sjamie if (tpr->pr_ip4 == NULL || 1301192895Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1302192895Sjamie continue; 1303192895Sjamie for (ii = 0; ii < ip4s; ii++) { 1304191673Sjamie if (_prison_check_ip4(tpr, 1305191673Sjamie &ip4[ii]) == 0) { 1306192895Sjamie error = EADDRINUSE; 1307191673Sjamie vfs_opterror(opts, 1308191673Sjamie "IPv4 addresses clash"); 1309191673Sjamie goto done_deref_locked; 1310191673Sjamie } 1311192895Sjamie } 1312192895Sjamie } 1313192895Sjamie } 1314192895Sjamie } 1315185435Sbz#endif 1316191673Sjamie#ifdef INET6 1317192895Sjamie if (ch_flags & PR_IP6_USER) { 1318192895Sjamie if (ppr->pr_flags & PR_IP6) { 1319192895Sjamie if (!(pr_flags & PR_IP6_USER)) { 1320192895Sjamie /* 1321192895Sjamie * Silently ignore attempts to make the IP 1322192895Sjamie * addresses unrestricted when the parent is 1323192895Sjamie * restricted. 1324192895Sjamie */ 1325192895Sjamie ip6s = ppr->pr_ip6s; 1326192895Sjamie if (ip6s == 0) { 1327192895Sjamie free(ip6, M_PRISON); 1328192895Sjamie ip6 = NULL; 1329192895Sjamie } else if (ip6s <= ip6a) { 1330192895Sjamie /* Inherit the parent's address(es). */ 1331192895Sjamie bcopy(ppr->pr_ip6, ip6, 1332192895Sjamie ip6s * sizeof(*ip6)); 1333192895Sjamie } else { 1334192895Sjamie /* 1335192895Sjamie * There's no room for the parent's 1336192895Sjamie * address list. 1337192895Sjamie */ 1338192895Sjamie ip6a = ip6s; 1339192895Sjamie free(ip6, M_PRISON); 1340192895Sjamie ip6 = malloc(ip6a * sizeof(*ip6), 1341192895Sjamie M_PRISON, M_NOWAIT); 1342192895Sjamie if (ip6 != NULL) 1343192895Sjamie bcopy(ppr->pr_ip6, ip6, 1344192895Sjamie ip6s * sizeof(*ip6)); 1345192895Sjamie else { 1346192895Sjamie prison_deref(pr, created 1347192895Sjamie ? PD_LOCKED | 1348192895Sjamie PD_LIST_XLOCKED 1349192895Sjamie : PD_DEREF | PD_LOCKED | 1350192895Sjamie PD_LIST_XLOCKED); 1351192895Sjamie if (root != NULL) { 1352192895Sjamie vfslocked = 1353192895Sjamie VFS_LOCK_GIANT( 1354192895Sjamie root->v_mount); 1355192895Sjamie vrele(root); 1356192895Sjamie VFS_UNLOCK_GIANT( 1357192895Sjamie vfslocked); 1358192895Sjamie } 1359192895Sjamie ip6 = malloc(ip6a * 1360192895Sjamie sizeof(*ip6), M_PRISON, 1361192895Sjamie M_WAITOK); 1362192895Sjamie goto again; 1363192895Sjamie } 1364192895Sjamie } 1365192895Sjamie } else if (ip6s > 0) { 1366192895Sjamie /* 1367192895Sjamie * Make sure the new set of IP addresses is a 1368192895Sjamie * subset of the parent's list. 1369192895Sjamie */ 1370192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1371192895Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1372192895Sjamie &ppr->pr_ip6[ij])) 1373192895Sjamie break; 1374192895Sjamie if (ij == ppr->pr_ip6s) { 1375192895Sjamie error = EPERM; 1376192895Sjamie goto done_deref_locked; 1377192895Sjamie } 1378192895Sjamie if (ip6s > 1) { 1379192895Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1380192895Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1381192895Sjamie &ppr->pr_ip6[0])) 1382192895Sjamie continue; 1383192895Sjamie for (; ij < ppr->pr_ip6s; ij++) 1384192895Sjamie if (IN6_ARE_ADDR_EQUAL( 1385192895Sjamie &ip6[ii], 1386192895Sjamie &ppr->pr_ip6[ij])) 1387192895Sjamie break; 1388192895Sjamie if (ij == ppr->pr_ip6s) 1389192895Sjamie break; 1390192895Sjamie } 1391192895Sjamie if (ij == ppr->pr_ip6s) { 1392192895Sjamie error = EPERM; 1393192895Sjamie goto done_deref_locked; 1394192895Sjamie } 1395192895Sjamie } 1396192895Sjamie } 1397192895Sjamie } 1398192895Sjamie if (ip6s > 0) { 1399192895Sjamie /* Check for conflicting IP addresses. */ 1400192895Sjamie FOREACH_PRISON_DESCENDANT(&prison0, tpr, descend) { 1401192895Sjamie if (tpr == pr || tpr->pr_uref == 0) { 1402192895Sjamie descend = 0; 1403192895Sjamie continue; 1404192895Sjamie } 1405192895Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1406192895Sjamie continue; 1407192895Sjamie descend = 0; 1408192895Sjamie if (tpr->pr_ip6 == NULL || 1409192895Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1410192895Sjamie continue; 1411192895Sjamie for (ii = 0; ii < ip6s; ii++) { 1412191673Sjamie if (_prison_check_ip6(tpr, 1413191673Sjamie &ip6[ii]) == 0) { 1414192895Sjamie error = EADDRINUSE; 1415191673Sjamie vfs_opterror(opts, 1416191673Sjamie "IPv6 addresses clash"); 1417191673Sjamie goto done_deref_locked; 1418191673Sjamie } 1419192895Sjamie } 1420192895Sjamie } 1421191673Sjamie } 1422192895Sjamie } 1423191673Sjamie#endif 1424192895Sjamie onamelen = namelen = 0; 1425192895Sjamie if (name != NULL) { 1426191673Sjamie /* Give a default name of the jid. */ 1427191673Sjamie if (name[0] == '\0') 1428191673Sjamie snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1429191673Sjamie else if (strtoul(name, &p, 10) != jid && *p == '\0') { 1430191673Sjamie error = EINVAL; 1431191673Sjamie vfs_opterror(opts, "name cannot be numeric"); 1432192895Sjamie goto done_deref_locked; 1433191673Sjamie } 1434191673Sjamie /* 1435192895Sjamie * Make sure the name isn't too long for the prison or its 1436192895Sjamie * children. 1437191673Sjamie */ 1438192895Sjamie onamelen = strlen(pr->pr_name); 1439192895Sjamie namelen = strlen(name); 1440192895Sjamie if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1441192895Sjamie error = ENAMETOOLONG; 1442192895Sjamie goto done_deref_locked; 1443192895Sjamie } 1444192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1445192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1446192895Sjamie sizeof(pr->pr_name)) { 1447192895Sjamie error = ENAMETOOLONG; 1448192895Sjamie goto done_deref_locked; 1449192895Sjamie } 1450192895Sjamie } 1451191673Sjamie } 1452192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1453192895Sjamie error = EPERM; 1454192895Sjamie goto done_deref_locked; 1455192895Sjamie } 1456185435Sbz 1457191673Sjamie /* Set the parameters of the prison. */ 1458191673Sjamie#ifdef INET 1459192895Sjamie redo_ip4 = 0; 1460192895Sjamie if (ch_flags & PR_IP4_USER) { 1461192895Sjamie if (pr_flags & PR_IP4_USER) { 1462192895Sjamie /* Some restriction set. */ 1463192895Sjamie pr->pr_flags |= PR_IP4; 1464192895Sjamie if (ip4s >= 0) { 1465192895Sjamie free(pr->pr_ip4, M_PRISON); 1466192895Sjamie pr->pr_ip4s = ip4s; 1467192895Sjamie pr->pr_ip4 = ip4; 1468192895Sjamie ip4 = NULL; 1469192895Sjamie } 1470192895Sjamie } else if (ppr->pr_flags & PR_IP4) { 1471192895Sjamie /* This restriction cleared, but keep inherited. */ 1472192895Sjamie free(pr->pr_ip4, M_PRISON); 1473192895Sjamie pr->pr_ip4s = ip4s; 1474192895Sjamie pr->pr_ip4 = ip4; 1475192895Sjamie ip4 = NULL; 1476192895Sjamie } else { 1477192895Sjamie /* Restriction cleared, now unrestricted. */ 1478192895Sjamie pr->pr_flags &= ~PR_IP4; 1479192895Sjamie free(pr->pr_ip4, M_PRISON); 1480192895Sjamie pr->pr_ip4s = 0; 1481192895Sjamie } 1482192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1483192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1484192895Sjamie redo_ip4 = 1; 1485192895Sjamie descend = 0; 1486192895Sjamie } 1487192895Sjamie } 1488185435Sbz } 1489191673Sjamie#endif 1490191673Sjamie#ifdef INET6 1491192895Sjamie redo_ip6 = 0; 1492192895Sjamie if (ch_flags & PR_IP6_USER) { 1493192895Sjamie if (pr_flags & PR_IP6_USER) { 1494192895Sjamie /* Some restriction set. */ 1495192895Sjamie pr->pr_flags |= PR_IP6; 1496192895Sjamie if (ip6s >= 0) { 1497192895Sjamie free(pr->pr_ip6, M_PRISON); 1498192895Sjamie pr->pr_ip6s = ip6s; 1499192895Sjamie pr->pr_ip6 = ip6; 1500192895Sjamie ip6 = NULL; 1501192895Sjamie } 1502192895Sjamie } else if (ppr->pr_flags & PR_IP6) { 1503192895Sjamie /* This restriction cleared, but keep inherited. */ 1504192895Sjamie free(pr->pr_ip6, M_PRISON); 1505192895Sjamie pr->pr_ip6s = ip6s; 1506192895Sjamie pr->pr_ip6 = ip6; 1507192895Sjamie ip6 = NULL; 1508192895Sjamie } else { 1509192895Sjamie /* Restriction cleared, now unrestricted. */ 1510192895Sjamie pr->pr_flags &= ~PR_IP6; 1511192895Sjamie free(pr->pr_ip6, M_PRISON); 1512192895Sjamie pr->pr_ip6s = 0; 1513192895Sjamie } 1514192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1515192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1516192895Sjamie redo_ip6 = 1; 1517192895Sjamie descend = 0; 1518192895Sjamie } 1519192895Sjamie } 1520191673Sjamie } 1521191673Sjamie#endif 1522192895Sjamie if (gotslevel) { 1523191673Sjamie pr->pr_securelevel = slevel; 1524192895Sjamie /* Set all child jails to be at least this level. */ 1525192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1526192895Sjamie if (tpr->pr_securelevel < slevel) 1527192895Sjamie tpr->pr_securelevel = slevel; 1528192895Sjamie } 1529194762Sjamie if (gotchildmax) { 1530194762Sjamie pr->pr_childmax = childmax; 1531194762Sjamie /* Set all child jails to under this limit. */ 1532194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1533194762Sjamie if (tpr->pr_childmax > childmax - level) 1534194762Sjamie tpr->pr_childmax = childmax > level 1535194762Sjamie ? childmax - level : 0; 1536194762Sjamie } 1537192895Sjamie if (gotenforce) { 1538192895Sjamie pr->pr_enforce_statfs = enforce; 1539192895Sjamie /* Pass this restriction on to the children. */ 1540192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1541192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1542192895Sjamie tpr->pr_enforce_statfs = enforce; 1543192895Sjamie } 1544192895Sjamie if (name != NULL) { 1545192895Sjamie if (ppr == &prison0) 1546192895Sjamie strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1547192895Sjamie else 1548192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1549192895Sjamie ppr->pr_name, name); 1550192895Sjamie /* Change this component of child names. */ 1551192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1552192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1553192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1554192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1555192895Sjamie } 1556192895Sjamie } 1557191673Sjamie if (path != NULL) { 1558192895Sjamie /* Try to keep a real-rooted full pathname. */ 1559192895Sjamie if (path[0] == '/' && strcmp(mypr->pr_path, "/")) 1560192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1561192895Sjamie mypr->pr_path, path); 1562192895Sjamie else 1563192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1564191673Sjamie pr->pr_root = root; 1565191673Sjamie } 1566193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1567193066Sjamie if (pr->pr_flags & PR_HOST) { 1568193066Sjamie /* 1569193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1570193066Sjamie * the lack of a lock on the parent is not a problem; 1571193066Sjamie * it is always set with allprison_lock at least 1572193066Sjamie * shared, and is held exclusively here. 1573193066Sjamie */ 1574194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1575194118Sjamie sizeof(pr->pr_hostname)); 1576194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1577194118Sjamie sizeof(pr->pr_domainname)); 1578194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1579194118Sjamie sizeof(pr->pr_hostuuid)); 1580193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1581193066Sjamie } 1582193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1583193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1584193066Sjamie if (host != NULL) 1585194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1586193066Sjamie if (domain != NULL) 1587194118Sjamie strlcpy(pr->pr_domainname, domain, 1588194118Sjamie sizeof(pr->pr_domainname)); 1589193066Sjamie if (uuid != NULL) 1590194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1591193066Sjamie if (gothid) 1592193066Sjamie pr->pr_hostid = hid; 1593193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1594193066Sjamie if (tpr->pr_flags & PR_HOST) 1595193066Sjamie descend = 0; 1596193066Sjamie else { 1597193066Sjamie if (host != NULL) 1598194118Sjamie strlcpy(tpr->pr_hostname, 1599194118Sjamie pr->pr_hostname, 1600194118Sjamie sizeof(tpr->pr_hostname)); 1601193066Sjamie if (domain != NULL) 1602194118Sjamie strlcpy(tpr->pr_domainname, 1603194118Sjamie pr->pr_domainname, 1604194118Sjamie sizeof(tpr->pr_domainname)); 1605193066Sjamie if (uuid != NULL) 1606194118Sjamie strlcpy(tpr->pr_hostuuid, 1607194118Sjamie pr->pr_hostuuid, 1608194118Sjamie sizeof(tpr->pr_hostuuid)); 1609193066Sjamie if (gothid) 1610193066Sjamie tpr->pr_hostid = hid; 1611193066Sjamie } 1612193066Sjamie } 1613193066Sjamie } 1614192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1615192895Sjamie /* Clear allow bits in all children. */ 1616192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1617192895Sjamie tpr->pr_allow &= ~tallow; 1618192895Sjamie } 1619192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1620191673Sjamie /* 1621191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1622191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1623191673Sjamie * for now, so new ones will remain unseen until after the module 1624191673Sjamie * handlers have completed. 1625191673Sjamie */ 1626191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1627191673Sjamie if (pr_flags & PR_PERSIST) { 1628191673Sjamie pr->pr_ref++; 1629191673Sjamie pr->pr_uref++; 1630191673Sjamie } else { 1631191673Sjamie pr->pr_ref--; 1632191673Sjamie pr->pr_uref--; 1633191673Sjamie } 1634191673Sjamie } 1635191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1636191673Sjamie mtx_unlock(&pr->pr_mtx); 1637185435Sbz 1638192895Sjamie /* Locks may have prevented a complete restriction of child IP 1639192895Sjamie * addresses. If so, allocate some more memory and try again. 1640192895Sjamie */ 1641192895Sjamie#ifdef INET 1642192895Sjamie while (redo_ip4) { 1643192895Sjamie ip4s = pr->pr_ip4s; 1644192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1645192895Sjamie mtx_lock(&pr->pr_mtx); 1646192895Sjamie redo_ip4 = 0; 1647192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1648192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1649192895Sjamie if (ip4 != NULL) 1650192895Sjamie ip4 = NULL; 1651192895Sjamie else 1652192895Sjamie redo_ip4 = 1; 1653192895Sjamie } 1654192895Sjamie } 1655192895Sjamie mtx_unlock(&pr->pr_mtx); 1656192895Sjamie } 1657192895Sjamie#endif 1658192895Sjamie#ifdef INET6 1659192895Sjamie while (redo_ip6) { 1660192895Sjamie ip6s = pr->pr_ip6s; 1661192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1662192895Sjamie mtx_lock(&pr->pr_mtx); 1663192895Sjamie redo_ip6 = 0; 1664192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1665192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1666192895Sjamie if (ip6 != NULL) 1667192895Sjamie ip6 = NULL; 1668192895Sjamie else 1669192895Sjamie redo_ip6 = 1; 1670192895Sjamie } 1671192895Sjamie } 1672192895Sjamie mtx_unlock(&pr->pr_mtx); 1673192895Sjamie } 1674192895Sjamie#endif 1675192895Sjamie 1676191673Sjamie /* Let the modules do their work. */ 1677191673Sjamie sx_downgrade(&allprison_lock); 1678191673Sjamie if (created) { 1679191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1680191673Sjamie if (error) { 1681191673Sjamie prison_deref(pr, PD_LIST_SLOCKED); 1682191673Sjamie goto done_errmsg; 1683191673Sjamie } 1684191673Sjamie } 1685191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1686191673Sjamie if (error) { 1687191673Sjamie prison_deref(pr, created 1688191673Sjamie ? PD_LIST_SLOCKED 1689191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1690191673Sjamie goto done_errmsg; 1691191673Sjamie } 1692191673Sjamie 1693191673Sjamie /* Attach this process to the prison if requested. */ 1694191673Sjamie if (flags & JAIL_ATTACH) { 1695191673Sjamie mtx_lock(&pr->pr_mtx); 1696191673Sjamie error = do_jail_attach(td, pr); 1697191673Sjamie if (error) { 1698191673Sjamie vfs_opterror(opts, "attach failed"); 1699191673Sjamie if (!created) 1700191673Sjamie prison_deref(pr, PD_DEREF); 1701191673Sjamie goto done_errmsg; 1702191673Sjamie } 1703191673Sjamie } 1704191673Sjamie 1705191673Sjamie /* 1706191673Sjamie * Now that it is all there, drop the temporary reference from existing 1707191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1708191673Sjamie * (which was not done earlier so that the prison would not be publicly 1709191673Sjamie * visible). 1710191673Sjamie */ 1711191673Sjamie if (!created) { 1712191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1713191673Sjamie ? PD_DEREF 1714191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1715191673Sjamie } else { 1716191673Sjamie if (pr_flags & PR_PERSIST) { 1717191673Sjamie mtx_lock(&pr->pr_mtx); 1718191673Sjamie pr->pr_ref++; 1719191673Sjamie pr->pr_uref++; 1720191673Sjamie mtx_unlock(&pr->pr_mtx); 1721191673Sjamie } 1722191673Sjamie if (!(flags & JAIL_ATTACH)) 1723191673Sjamie sx_sunlock(&allprison_lock); 1724191673Sjamie } 1725191673Sjamie td->td_retval[0] = pr->pr_id; 1726191673Sjamie goto done_errmsg; 1727191673Sjamie 1728192895Sjamie done_deref_locked: 1729192895Sjamie prison_deref(pr, created 1730192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1731192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1732192895Sjamie goto done_releroot; 1733191673Sjamie done_unlock_list: 1734191673Sjamie sx_xunlock(&allprison_lock); 1735191673Sjamie done_releroot: 1736191673Sjamie if (root != NULL) { 1737191673Sjamie vfslocked = VFS_LOCK_GIANT(root->v_mount); 1738191673Sjamie vrele(root); 1739191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 1740191673Sjamie } 1741191673Sjamie done_errmsg: 1742191673Sjamie if (error) { 1743191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1744191673Sjamie if (errmsg_len > 0) { 1745191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1746191673Sjamie if (errmsg_pos > 0) { 1747191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1748191673Sjamie bcopy(errmsg, 1749191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1750191673Sjamie errmsg_len); 1751191673Sjamie else 1752191673Sjamie copyout(errmsg, 1753191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1754191673Sjamie errmsg_len); 1755191673Sjamie } 1756191673Sjamie } 1757191673Sjamie } 1758191673Sjamie done_free: 1759191673Sjamie#ifdef INET 1760191673Sjamie free(ip4, M_PRISON); 1761191673Sjamie#endif 1762191673Sjamie#ifdef INET6 1763191673Sjamie free(ip6, M_PRISON); 1764191673Sjamie#endif 1765191673Sjamie vfs_freeopts(opts); 1766191673Sjamie return (error); 1767191673Sjamie} 1768191673Sjamie 1769191673Sjamie 177082710Sdillon/* 1771191673Sjamie * struct jail_get_args { 1772191673Sjamie * struct iovec *iovp; 1773191673Sjamie * unsigned int iovcnt; 1774191673Sjamie * int flags; 1775114168Smike * }; 177682710Sdillon */ 177746155Sphkint 1778191673Sjamiejail_get(struct thread *td, struct jail_get_args *uap) 177946155Sphk{ 1780191673Sjamie struct uio *auio; 1781185435Sbz int error; 1782185435Sbz 1783191673Sjamie /* Check that we have an even number of iovecs. */ 1784191673Sjamie if (uap->iovcnt & 1) 1785191673Sjamie return (EINVAL); 1786191673Sjamie 1787191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1788185435Sbz if (error) 1789185435Sbz return (error); 1790191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1791191673Sjamie if (error == 0) 1792191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1793191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1794191673Sjamie free(auio, M_IOV); 1795191673Sjamie return (error); 1796191673Sjamie} 1797185435Sbz 1798191673Sjamieint 1799191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 1800191673Sjamie{ 1801192895Sjamie struct prison *pr, *mypr; 1802191673Sjamie struct vfsopt *opt; 1803191673Sjamie struct vfsoptlist *opts; 1804191673Sjamie char *errmsg, *name; 1805192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1806185435Sbz 1807191673Sjamie if (flags & ~JAIL_GET_MASK) 1808191673Sjamie return (EINVAL); 1809185435Sbz 1810191673Sjamie /* Get the parameter list. */ 1811191673Sjamie error = vfs_buildopts(optuio, &opts); 1812191673Sjamie if (error) 1813191673Sjamie return (error); 1814191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1815192895Sjamie mypr = td->td_ucred->cr_prison; 1816185435Sbz 1817191673Sjamie /* 1818191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 1819191673Sjamie */ 1820191673Sjamie sx_slock(&allprison_lock); 1821191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1822191673Sjamie if (error == 0) { 1823191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 1824192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1825191673Sjamie mtx_lock(&pr->pr_mtx); 1826191673Sjamie if (pr->pr_ref > 0 && 1827191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1828191673Sjamie break; 1829191673Sjamie mtx_unlock(&pr->pr_mtx); 1830191673Sjamie } 1831191673Sjamie } 1832191673Sjamie if (pr != NULL) 1833191673Sjamie goto found_prison; 1834191673Sjamie error = ENOENT; 1835191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 1836191673Sjamie goto done_unlock_list; 1837191673Sjamie } else if (error != ENOENT) 1838191673Sjamie goto done_unlock_list; 1839185435Sbz 1840191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1841191673Sjamie if (error == 0) { 1842191673Sjamie if (jid != 0) { 1843192895Sjamie pr = prison_find_child(mypr, jid); 1844191673Sjamie if (pr != NULL) { 1845191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1846191673Sjamie mtx_unlock(&pr->pr_mtx); 1847191673Sjamie error = ENOENT; 1848191673Sjamie vfs_opterror(opts, "jail %d is dying", 1849191673Sjamie jid); 1850191673Sjamie goto done_unlock_list; 1851191673Sjamie } 1852191673Sjamie goto found_prison; 1853191673Sjamie } 1854191673Sjamie error = ENOENT; 1855191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1856191673Sjamie goto done_unlock_list; 1857191673Sjamie } 1858191673Sjamie } else if (error != ENOENT) 1859191673Sjamie goto done_unlock_list; 186046155Sphk 1861191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 1862191673Sjamie if (error == 0) { 1863191673Sjamie if (len == 0 || name[len - 1] != '\0') { 1864191673Sjamie error = EINVAL; 1865191673Sjamie goto done_unlock_list; 1866191673Sjamie } 1867192895Sjamie pr = prison_find_name(mypr, name); 1868191673Sjamie if (pr != NULL) { 1869191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1870191673Sjamie mtx_unlock(&pr->pr_mtx); 1871191673Sjamie error = ENOENT; 1872191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 1873191673Sjamie name); 1874191673Sjamie goto done_unlock_list; 1875191673Sjamie } 1876191673Sjamie goto found_prison; 1877191673Sjamie } 1878191673Sjamie error = ENOENT; 1879191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 1880191673Sjamie goto done_unlock_list; 1881191673Sjamie } else if (error != ENOENT) 1882191673Sjamie goto done_unlock_list; 1883185435Sbz 1884191673Sjamie vfs_opterror(opts, "no jail specified"); 1885191673Sjamie error = ENOENT; 1886191673Sjamie goto done_unlock_list; 1887191673Sjamie 1888191673Sjamie found_prison: 1889191673Sjamie /* Get the parameters of the prison. */ 1890191673Sjamie pr->pr_ref++; 1891191673Sjamie locked = PD_LOCKED; 1892191673Sjamie td->td_retval[0] = pr->pr_id; 1893191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 1894191673Sjamie if (error != 0 && error != ENOENT) 1895191673Sjamie goto done_deref; 1896192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 1897192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 1898191673Sjamie if (error != 0 && error != ENOENT) 1899191673Sjamie goto done_deref; 1900192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 1901192895Sjamie if (error != 0 && error != ENOENT) 1902192895Sjamie goto done_deref; 1903192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 1904191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 1905191673Sjamie if (error != 0 && error != ENOENT) 1906191673Sjamie goto done_deref; 1907192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 1908191673Sjamie if (error != 0 && error != ENOENT) 1909191673Sjamie goto done_deref; 1910191673Sjamie#ifdef INET 1911191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 1912191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1913191673Sjamie if (error != 0 && error != ENOENT) 1914191673Sjamie goto done_deref; 1915191673Sjamie#endif 1916191673Sjamie#ifdef INET6 1917191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 1918191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1919191673Sjamie if (error != 0 && error != ENOENT) 1920191673Sjamie goto done_deref; 1921191673Sjamie#endif 1922191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 1923191673Sjamie sizeof(pr->pr_securelevel)); 1924191673Sjamie if (error != 0 && error != ENOENT) 1925191673Sjamie goto done_deref; 1926194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 1927194762Sjamie sizeof(pr->pr_childcount)); 1928194762Sjamie if (error != 0 && error != ENOENT) 1929194762Sjamie goto done_deref; 1930194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 1931194762Sjamie sizeof(pr->pr_childmax)); 1932194762Sjamie if (error != 0 && error != ENOENT) 1933194762Sjamie goto done_deref; 1934194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 1935191673Sjamie if (error != 0 && error != ENOENT) 1936191673Sjamie goto done_deref; 1937194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 1938193066Sjamie if (error != 0 && error != ENOENT) 1939193066Sjamie goto done_deref; 1940194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 1941193066Sjamie if (error != 0 && error != ENOENT) 1942193066Sjamie goto done_deref; 1943193066Sjamie#ifdef COMPAT_IA32 1944193066Sjamie if (td->td_proc->p_sysent->sv_flags & SV_IA32) { 1945193066Sjamie uint32_t hid32 = pr->pr_hostid; 1946193066Sjamie 1947193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 1948193066Sjamie } else 1949193066Sjamie#endif 1950193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 1951193066Sjamie sizeof(pr->pr_hostid)); 1952193066Sjamie if (error != 0 && error != ENOENT) 1953193066Sjamie goto done_deref; 1954192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 1955192895Sjamie sizeof(pr->pr_enforce_statfs)); 1956191673Sjamie if (error != 0 && error != ENOENT) 1957191673Sjamie goto done_deref; 1958192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 1959192895Sjamie fi++) { 1960192895Sjamie if (pr_flag_names[fi] == NULL) 1961192895Sjamie continue; 1962192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 1963192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 1964192895Sjamie if (error != 0 && error != ENOENT) 1965192895Sjamie goto done_deref; 1966192895Sjamie i = !i; 1967192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 1968192895Sjamie if (error != 0 && error != ENOENT) 1969192895Sjamie goto done_deref; 1970192895Sjamie } 1971192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 1972192895Sjamie fi++) { 1973192895Sjamie if (pr_allow_names[fi] == NULL) 1974192895Sjamie continue; 1975192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 1976192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 1977192895Sjamie if (error != 0 && error != ENOENT) 1978192895Sjamie goto done_deref; 1979192895Sjamie i = !i; 1980192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 1981192895Sjamie if (error != 0 && error != ENOENT) 1982192895Sjamie goto done_deref; 1983192895Sjamie } 1984191673Sjamie i = (pr->pr_uref == 0); 1985191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 1986191673Sjamie if (error != 0 && error != ENOENT) 1987191673Sjamie goto done_deref; 1988191673Sjamie i = !i; 1989191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 1990191673Sjamie if (error != 0 && error != ENOENT) 1991191673Sjamie goto done_deref; 1992191673Sjamie 1993191673Sjamie /* Get the module parameters. */ 1994191673Sjamie mtx_unlock(&pr->pr_mtx); 1995191673Sjamie locked = 0; 1996191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 199746155Sphk if (error) 1998191673Sjamie goto done_deref; 1999191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 200084828Sjhb 2001191673Sjamie /* By now, all parameters should have been noted. */ 2002191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2003191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2004191673Sjamie error = EINVAL; 2005191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2006191673Sjamie goto done_errmsg; 2007191673Sjamie } 2008185435Sbz } 2009191673Sjamie 2010191673Sjamie /* Write the fetched parameters back to userspace. */ 2011191673Sjamie error = 0; 2012191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2013191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2014191673Sjamie pos = 2 * opt->pos + 1; 2015191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2016191673Sjamie if (opt->value != NULL) { 2017191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2018191673Sjamie bcopy(opt->value, 2019191673Sjamie optuio->uio_iov[pos].iov_base, 2020191673Sjamie opt->len); 2021191673Sjamie } else { 2022191673Sjamie error = copyout(opt->value, 2023191673Sjamie optuio->uio_iov[pos].iov_base, 2024191673Sjamie opt->len); 2025191673Sjamie if (error) 2026191673Sjamie break; 2027191673Sjamie } 2028191673Sjamie } 2029191673Sjamie } 2030185435Sbz } 2031191673Sjamie goto done_errmsg; 2032191673Sjamie 2033191673Sjamie done_deref: 2034191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2035191673Sjamie goto done_errmsg; 2036191673Sjamie 2037191673Sjamie done_unlock_list: 2038191673Sjamie sx_sunlock(&allprison_lock); 2039191673Sjamie done_errmsg: 2040191673Sjamie if (error && errmsg_pos >= 0) { 2041191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2042191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2043191673Sjamie if (errmsg_len > 0) { 2044191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2045191673Sjamie bcopy(errmsg, 2046191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2047191673Sjamie errmsg_len); 2048191673Sjamie else 2049191673Sjamie copyout(errmsg, 2050191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2051191673Sjamie errmsg_len); 2052191673Sjamie } 2053185435Sbz } 2054191673Sjamie vfs_freeopts(opts); 2055191673Sjamie return (error); 2056191673Sjamie} 2057113275Smike 2058192895Sjamie 2059191673Sjamie/* 2060191673Sjamie * struct jail_remove_args { 2061191673Sjamie * int jid; 2062191673Sjamie * }; 2063191673Sjamie */ 2064191673Sjamieint 2065191673Sjamiejail_remove(struct thread *td, struct jail_remove_args *uap) 2066191673Sjamie{ 2067192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2068192895Sjamie int descend, error; 2069185435Sbz 2070191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2071185435Sbz if (error) 2072191673Sjamie return (error); 2073185435Sbz 2074185435Sbz sx_xlock(&allprison_lock); 2075192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2076191673Sjamie if (pr == NULL) { 2077185435Sbz sx_xunlock(&allprison_lock); 2078191673Sjamie return (EINVAL); 2079185435Sbz } 2080185435Sbz 2081192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2082192895Sjamie pr->pr_ref++; 2083192895Sjamie pr->pr_flags |= PR_REMOVE; 2084192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2085192895Sjamie mtx_unlock(&pr->pr_mtx); 2086192895Sjamie lpr = NULL; 2087192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2088192895Sjamie mtx_lock(&cpr->pr_mtx); 2089192895Sjamie if (cpr->pr_ref > 0) { 2090192895Sjamie tpr = cpr; 2091192895Sjamie cpr->pr_ref++; 2092192895Sjamie cpr->pr_flags |= PR_REMOVE; 2093192895Sjamie } else { 2094192895Sjamie /* Already removed - do not do it again. */ 2095192895Sjamie tpr = NULL; 2096192895Sjamie } 2097192895Sjamie mtx_unlock(&cpr->pr_mtx); 2098192895Sjamie if (lpr != NULL) { 2099192895Sjamie mtx_lock(&lpr->pr_mtx); 2100192895Sjamie prison_remove_one(lpr); 2101192895Sjamie sx_xlock(&allprison_lock); 2102192895Sjamie } 2103192895Sjamie lpr = tpr; 2104192895Sjamie } 2105192895Sjamie if (lpr != NULL) { 2106192895Sjamie mtx_lock(&lpr->pr_mtx); 2107192895Sjamie prison_remove_one(lpr); 2108192895Sjamie sx_xlock(&allprison_lock); 2109192895Sjamie } 2110192895Sjamie mtx_lock(&pr->pr_mtx); 2111192895Sjamie } 2112192895Sjamie prison_remove_one(pr); 2113192895Sjamie return (0); 2114192895Sjamie} 2115192895Sjamie 2116192895Sjamiestatic void 2117192895Sjamieprison_remove_one(struct prison *pr) 2118192895Sjamie{ 2119192895Sjamie struct proc *p; 2120192895Sjamie int deuref; 2121192895Sjamie 2122191673Sjamie /* If the prison was persistent, it is not anymore. */ 2123191673Sjamie deuref = 0; 2124191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2125191673Sjamie pr->pr_ref--; 2126191673Sjamie deuref = PD_DEUREF; 2127191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2128179881Sdelphij } 2129113275Smike 2130192895Sjamie /* 2131192895Sjamie * jail_remove added a reference. If that's the only one, remove 2132192895Sjamie * the prison now. 2133192895Sjamie */ 2134192895Sjamie KASSERT(pr->pr_ref > 0, 2135192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2136192895Sjamie if (pr->pr_ref == 1) { 2137191673Sjamie prison_deref(pr, 2138191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2139192895Sjamie return; 2140191673Sjamie } 2141191673Sjamie 2142113275Smike mtx_unlock(&pr->pr_mtx); 2143191673Sjamie sx_xunlock(&allprison_lock); 2144191673Sjamie /* 2145191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2146191673Sjamie */ 2147191673Sjamie sx_slock(&allproc_lock); 2148191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2149191673Sjamie PROC_LOCK(p); 2150191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2151191673Sjamie p->p_ucred->cr_prison == pr) 2152191673Sjamie psignal(p, SIGKILL); 2153191673Sjamie PROC_UNLOCK(p); 2154191673Sjamie } 2155191673Sjamie sx_sunlock(&allproc_lock); 2156192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2157191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2158113275Smike} 2159113275Smike 2160190466Sjamie 2161113275Smike/* 2162114168Smike * struct jail_attach_args { 2163114168Smike * int jid; 2164114168Smike * }; 2165113275Smike */ 2166113275Smikeint 2167114168Smikejail_attach(struct thread *td, struct jail_attach_args *uap) 2168113275Smike{ 2169113275Smike struct prison *pr; 2170191673Sjamie int error; 2171167309Spjd 2172164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2173126023Snectar if (error) 2174126023Snectar return (error); 2175126023Snectar 2176168401Spjd sx_slock(&allprison_lock); 2177192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2178113275Smike if (pr == NULL) { 2179168401Spjd sx_sunlock(&allprison_lock); 2180113275Smike return (EINVAL); 2181113275Smike } 2182185435Sbz 2183185435Sbz /* 2184185435Sbz * Do not allow a process to attach to a prison that is not 2185191673Sjamie * considered to be "alive". 2186185435Sbz */ 2187191673Sjamie if (pr->pr_uref == 0) { 2188185435Sbz mtx_unlock(&pr->pr_mtx); 2189185435Sbz sx_sunlock(&allprison_lock); 2190185435Sbz return (EINVAL); 2191185435Sbz } 2192191673Sjamie 2193191673Sjamie return (do_jail_attach(td, pr)); 2194191673Sjamie} 2195191673Sjamie 2196191673Sjamiestatic int 2197191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2198191673Sjamie{ 2199192895Sjamie struct prison *ppr; 2200191673Sjamie struct proc *p; 2201191673Sjamie struct ucred *newcred, *oldcred; 2202191673Sjamie int vfslocked, error; 2203191673Sjamie 2204191673Sjamie /* 2205191673Sjamie * XXX: Note that there is a slight race here if two threads 2206191673Sjamie * in the same privileged process attempt to attach to two 2207191673Sjamie * different jails at the same time. It is important for 2208191673Sjamie * user processes not to do this, or they might end up with 2209191673Sjamie * a process root from one prison, but attached to the jail 2210191673Sjamie * of another. 2211191673Sjamie */ 2212113275Smike pr->pr_ref++; 2213191673Sjamie pr->pr_uref++; 2214113275Smike mtx_unlock(&pr->pr_mtx); 2215191673Sjamie 2216191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2217191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2218191673Sjamie if (error) { 2219191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2220191673Sjamie return (error); 2221191673Sjamie } 2222168401Spjd sx_sunlock(&allprison_lock); 2223113275Smike 2224185435Sbz /* 2225185435Sbz * Reparent the newly attached process to this jail. 2226185435Sbz */ 2227192895Sjamie ppr = td->td_ucred->cr_prison; 2228191673Sjamie p = td->td_proc; 2229185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2230185435Sbz if (error) 2231191673Sjamie goto e_revert_osd; 2232185435Sbz 2233150652Scsjp vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2234175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2235113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2236113275Smike goto e_unlock; 2237113275Smike#ifdef MAC 2238172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2239113275Smike goto e_unlock; 2240113275Smike#endif 2241175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2242191673Sjamie if ((error = change_root(pr->pr_root, td))) 2243191673Sjamie goto e_unlock_giant; 2244150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2245113275Smike 224684828Sjhb newcred = crget(); 224784828Sjhb PROC_LOCK(p); 224884828Sjhb oldcred = p->p_ucred; 2249113275Smike setsugid(p); 225084828Sjhb crcopy(newcred, oldcred); 2251113630Sjhb newcred->cr_prison = pr; 225284828Sjhb p->p_ucred = newcred; 225384828Sjhb PROC_UNLOCK(p); 225484828Sjhb crfree(oldcred); 2255192895Sjamie prison_deref(ppr, PD_DEREF | PD_DEUREF); 225646155Sphk return (0); 2257191673Sjamie e_unlock: 2258175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2259191673Sjamie e_unlock_giant: 2260150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2261191673Sjamie e_revert_osd: 2262191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2263192895Sjamie (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2264191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 226546155Sphk return (error); 226646155Sphk} 226746155Sphk 2268192895Sjamie 2269113275Smike/* 2270113275Smike * Returns a locked prison instance, or NULL on failure. 2271113275Smike */ 2272168399Spjdstruct prison * 2273113275Smikeprison_find(int prid) 2274113275Smike{ 2275113275Smike struct prison *pr; 2276113275Smike 2277168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2278191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2279113275Smike if (pr->pr_id == prid) { 2280113275Smike mtx_lock(&pr->pr_mtx); 2281191673Sjamie if (pr->pr_ref > 0) 2282191673Sjamie return (pr); 2283191673Sjamie mtx_unlock(&pr->pr_mtx); 2284113275Smike } 2285113275Smike } 2286113275Smike return (NULL); 2287113275Smike} 2288113275Smike 2289191673Sjamie/* 2290192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2291191673Sjamie */ 2292191673Sjamiestruct prison * 2293192895Sjamieprison_find_child(struct prison *mypr, int prid) 2294191673Sjamie{ 2295192895Sjamie struct prison *pr; 2296192895Sjamie int descend; 2297192895Sjamie 2298192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2299192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2300192895Sjamie if (pr->pr_id == prid) { 2301192895Sjamie mtx_lock(&pr->pr_mtx); 2302192895Sjamie if (pr->pr_ref > 0) 2303192895Sjamie return (pr); 2304192895Sjamie mtx_unlock(&pr->pr_mtx); 2305192895Sjamie } 2306192895Sjamie } 2307192895Sjamie return (NULL); 2308192895Sjamie} 2309192895Sjamie 2310192895Sjamie/* 2311192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2312192895Sjamie */ 2313192895Sjamiestruct prison * 2314192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2315192895Sjamie{ 2316191673Sjamie struct prison *pr, *deadpr; 2317192895Sjamie size_t mylen; 2318192895Sjamie int descend; 2319191673Sjamie 2320191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2321192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2322191673Sjamie again: 2323191673Sjamie deadpr = NULL; 2324192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2325192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2326191673Sjamie mtx_lock(&pr->pr_mtx); 2327191673Sjamie if (pr->pr_ref > 0) { 2328191673Sjamie if (pr->pr_uref > 0) 2329191673Sjamie return (pr); 2330191673Sjamie deadpr = pr; 2331191673Sjamie } 2332191673Sjamie mtx_unlock(&pr->pr_mtx); 2333191673Sjamie } 2334191673Sjamie } 2335192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2336191673Sjamie if (deadpr != NULL) { 2337191673Sjamie mtx_lock(&deadpr->pr_mtx); 2338191673Sjamie if (deadpr->pr_ref == 0) { 2339191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2340191673Sjamie goto again; 2341191673Sjamie } 2342191673Sjamie } 2343191673Sjamie return (deadpr); 2344191673Sjamie} 2345191673Sjamie 2346191673Sjamie/* 2347192895Sjamie * See if a prison has the specific flag set. 2348192895Sjamie */ 2349192895Sjamieint 2350192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2351192895Sjamie{ 2352192895Sjamie 2353192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2354192895Sjamie return (cred->cr_prison->pr_flags & flag); 2355192895Sjamie} 2356192895Sjamie 2357192895Sjamieint 2358192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2359192895Sjamie{ 2360192895Sjamie 2361192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2362192895Sjamie return (cred->cr_prison->pr_allow & flag); 2363192895Sjamie} 2364192895Sjamie 2365192895Sjamie/* 2366191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2367191673Sjamie * prison itself - but not in this context in case there are locks held. 2368191673Sjamie */ 236972786Srwatsonvoid 2370185029Spjdprison_free_locked(struct prison *pr) 237172786Srwatson{ 237272786Srwatson 2373185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 237472786Srwatson pr->pr_ref--; 237572786Srwatson if (pr->pr_ref == 0) { 2376168483Spjd mtx_unlock(&pr->pr_mtx); 2377124882Srwatson TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2378144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 237987275Srwatson return; 238072786Srwatson } 238187275Srwatson mtx_unlock(&pr->pr_mtx); 238272786Srwatson} 238372786Srwatson 2384185029Spjdvoid 2385185029Spjdprison_free(struct prison *pr) 2386185029Spjd{ 2387185029Spjd 2388185029Spjd mtx_lock(&pr->pr_mtx); 2389185029Spjd prison_free_locked(pr); 2390185029Spjd} 2391185029Spjd 2392124882Srwatsonstatic void 2393124882Srwatsonprison_complete(void *context, int pending) 2394124882Srwatson{ 2395191673Sjamie 2396191673Sjamie prison_deref((struct prison *)context, 0); 2397191673Sjamie} 2398191673Sjamie 2399191673Sjamie/* 2400191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2401191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2402191673Sjamie * references, release and delist the prison. On completion, the prison lock 2403191673Sjamie * and the allprison lock are both unlocked. 2404191673Sjamie */ 2405191673Sjamiestatic void 2406191673Sjamieprison_deref(struct prison *pr, int flags) 2407191673Sjamie{ 2408192895Sjamie struct prison *ppr, *tpr; 2409150652Scsjp int vfslocked; 2410124882Srwatson 2411191673Sjamie if (!(flags & PD_LOCKED)) 2412191673Sjamie mtx_lock(&pr->pr_mtx); 2413192895Sjamie /* Decrement the user references in a separate loop. */ 2414191673Sjamie if (flags & PD_DEUREF) { 2415192895Sjamie for (tpr = pr;; tpr = tpr->pr_parent) { 2416192895Sjamie if (tpr != pr) 2417192895Sjamie mtx_lock(&tpr->pr_mtx); 2418192895Sjamie if (--tpr->pr_uref > 0) 2419192895Sjamie break; 2420192895Sjamie KASSERT(tpr != &prison0, ("prison0 pr_uref=0")); 2421192895Sjamie mtx_unlock(&tpr->pr_mtx); 2422192895Sjamie } 2423191673Sjamie /* Done if there were only user references to remove. */ 2424191673Sjamie if (!(flags & PD_DEREF)) { 2425192895Sjamie mtx_unlock(&tpr->pr_mtx); 2426191673Sjamie if (flags & PD_LIST_SLOCKED) 2427191673Sjamie sx_sunlock(&allprison_lock); 2428191673Sjamie else if (flags & PD_LIST_XLOCKED) 2429191673Sjamie sx_xunlock(&allprison_lock); 2430191673Sjamie return; 2431191673Sjamie } 2432192895Sjamie if (tpr != pr) { 2433192895Sjamie mtx_unlock(&tpr->pr_mtx); 2434192895Sjamie mtx_lock(&pr->pr_mtx); 2435192895Sjamie } 2436191673Sjamie } 2437124882Srwatson 2438192895Sjamie for (;;) { 2439192895Sjamie if (flags & PD_DEREF) 2440192895Sjamie pr->pr_ref--; 2441192895Sjamie /* If the prison still has references, nothing else to do. */ 2442192895Sjamie if (pr->pr_ref > 0) { 2443192895Sjamie mtx_unlock(&pr->pr_mtx); 2444192895Sjamie if (flags & PD_LIST_SLOCKED) 2445192895Sjamie sx_sunlock(&allprison_lock); 2446192895Sjamie else if (flags & PD_LIST_XLOCKED) 2447192895Sjamie sx_xunlock(&allprison_lock); 2448192895Sjamie return; 2449191673Sjamie } 2450191673Sjamie 2451192895Sjamie mtx_unlock(&pr->pr_mtx); 2452192895Sjamie if (flags & PD_LIST_SLOCKED) { 2453192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2454192895Sjamie sx_sunlock(&allprison_lock); 2455192895Sjamie sx_xlock(&allprison_lock); 2456192895Sjamie } 2457192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2458192895Sjamie sx_xlock(&allprison_lock); 2459168489Spjd 2460192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2461192895Sjamie LIST_REMOVE(pr, pr_sibling); 2462192895Sjamie ppr = pr->pr_parent; 2463192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2464194762Sjamie tpr->pr_childcount--; 2465192895Sjamie sx_downgrade(&allprison_lock); 2466192895Sjamie 2467194251Sjamie#ifdef VIMAGE 2468194251Sjamie if (pr->pr_flags & PR_VNET) 2469194251Sjamie vnet_destroy(pr->pr_vnet); 2470194251Sjamie#endif 2471192895Sjamie if (pr->pr_root != NULL) { 2472192895Sjamie vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2473192895Sjamie vrele(pr->pr_root); 2474192895Sjamie VFS_UNLOCK_GIANT(vfslocked); 2475192895Sjamie } 2476192895Sjamie mtx_destroy(&pr->pr_mtx); 2477191673Sjamie#ifdef INET 2478192895Sjamie free(pr->pr_ip4, M_PRISON); 2479191673Sjamie#endif 2480185435Sbz#ifdef INET6 2481192895Sjamie free(pr->pr_ip6, M_PRISON); 2482185435Sbz#endif 2483192895Sjamie if (pr->pr_cpuset != NULL) 2484192895Sjamie cpuset_rel(pr->pr_cpuset); 2485192895Sjamie osd_jail_exit(pr); 2486192895Sjamie free(pr, M_PRISON); 2487192895Sjamie 2488192895Sjamie /* Removing a prison frees a reference on its parent. */ 2489192895Sjamie pr = ppr; 2490192895Sjamie mtx_lock(&pr->pr_mtx); 2491192895Sjamie flags = PD_DEREF | PD_LIST_SLOCKED; 2492192895Sjamie } 2493124882Srwatson} 2494124882Srwatson 249572786Srwatsonvoid 2496185029Spjdprison_hold_locked(struct prison *pr) 249772786Srwatson{ 249872786Srwatson 2499185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2500168489Spjd KASSERT(pr->pr_ref > 0, 2501191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 250272786Srwatson pr->pr_ref++; 2503185029Spjd} 2504185029Spjd 2505185029Spjdvoid 2506185029Spjdprison_hold(struct prison *pr) 2507185029Spjd{ 2508185029Spjd 2509185029Spjd mtx_lock(&pr->pr_mtx); 2510185029Spjd prison_hold_locked(pr); 251187275Srwatson mtx_unlock(&pr->pr_mtx); 251272786Srwatson} 251372786Srwatson 2514185435Sbzvoid 2515185435Sbzprison_proc_hold(struct prison *pr) 251687275Srwatson{ 251787275Srwatson 2518185435Sbz mtx_lock(&pr->pr_mtx); 2519191673Sjamie KASSERT(pr->pr_uref > 0, 2520191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2521191673Sjamie pr->pr_uref++; 2522185435Sbz mtx_unlock(&pr->pr_mtx); 252387275Srwatson} 252487275Srwatson 2525185435Sbzvoid 2526185435Sbzprison_proc_free(struct prison *pr) 2527185435Sbz{ 2528185435Sbz 2529185435Sbz mtx_lock(&pr->pr_mtx); 2530191673Sjamie KASSERT(pr->pr_uref > 0, 2531191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2532191673Sjamie prison_deref(pr, PD_DEUREF | PD_LOCKED); 2533185435Sbz} 2534185435Sbz 2535185435Sbz 2536185435Sbz#ifdef INET 2537185435Sbz/* 2538192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2539192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2540192895Sjamie */ 2541192895Sjamiestatic int 2542192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2543192895Sjamie{ 2544192895Sjamie int ii, ij, used; 2545192895Sjamie struct prison *ppr; 2546192895Sjamie 2547192895Sjamie ppr = pr->pr_parent; 2548192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2549192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2550192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2551192895Sjamie /* 2552192895Sjamie * There's no room for the parent's list. Use the 2553192895Sjamie * new list buffer, which is assumed to be big enough 2554192895Sjamie * (if it was passed). If there's no buffer, try to 2555192895Sjamie * allocate one. 2556192895Sjamie */ 2557192895Sjamie used = 1; 2558192895Sjamie if (newip4 == NULL) { 2559192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2560192895Sjamie M_PRISON, M_NOWAIT); 2561192895Sjamie if (newip4 != NULL) 2562192895Sjamie used = 0; 2563192895Sjamie } 2564192895Sjamie if (newip4 != NULL) { 2565192895Sjamie bcopy(ppr->pr_ip4, newip4, 2566192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2567192895Sjamie free(pr->pr_ip4, M_PRISON); 2568192895Sjamie pr->pr_ip4 = newip4; 2569192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2570192895Sjamie pr->pr_flags |= PR_IP4; 2571192895Sjamie } 2572192895Sjamie return (used); 2573192895Sjamie } 2574192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2575192895Sjamie if (pr->pr_ip4s > 0) 2576192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2577192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2578192895Sjamie else if (pr->pr_ip4 != NULL) { 2579192895Sjamie free(pr->pr_ip4, M_PRISON); 2580192895Sjamie pr->pr_ip4 = NULL; 2581192895Sjamie } 2582192895Sjamie pr->pr_flags = 2583192895Sjamie (pr->pr_flags & ~PR_IP4) | (ppr->pr_flags & PR_IP4); 2584192895Sjamie } else if (pr->pr_ip4s > 0 && (ppr->pr_flags & PR_IP4)) { 2585192895Sjamie /* Remove addresses that aren't in the parent. */ 2586192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2587192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2588192895Sjamie break; 2589192895Sjamie if (ij < ppr->pr_ip4s) 2590192895Sjamie ii = 1; 2591192895Sjamie else { 2592192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2593192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2594192895Sjamie ii = 0; 2595192895Sjamie } 2596192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2597192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2598192895Sjamie ii++; 2599192895Sjamie continue; 2600192895Sjamie } 2601192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2602192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2603192895Sjamie case -1: 2604192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2605192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2606192895Sjamie break; 2607192895Sjamie case 0: 2608192895Sjamie ii++; 2609192895Sjamie ij++; 2610192895Sjamie break; 2611192895Sjamie case 1: 2612192895Sjamie ij++; 2613192895Sjamie break; 2614192895Sjamie } 2615192895Sjamie } 2616192895Sjamie if (pr->pr_ip4s == 0) { 2617192895Sjamie free(pr->pr_ip4, M_PRISON); 2618192895Sjamie pr->pr_ip4 = NULL; 2619192895Sjamie } 2620192895Sjamie } 2621192895Sjamie return (0); 2622192895Sjamie} 2623192895Sjamie 2624192895Sjamie/* 2625185435Sbz * Pass back primary IPv4 address of this jail. 2626185435Sbz * 2627192895Sjamie * If not restricted return success but do not alter the address. Caller has 2628192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2629185435Sbz * 2630188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2631188144Sjamie * Address returned in NBO. 2632185435Sbz */ 263346155Sphkint 2634187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 263546155Sphk{ 2636191673Sjamie struct prison *pr; 263746155Sphk 2638185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2639185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2640185435Sbz 2641192895Sjamie pr = cred->cr_prison; 2642192895Sjamie if (!(pr->pr_flags & PR_IP4)) 264346155Sphk return (0); 2644191673Sjamie mtx_lock(&pr->pr_mtx); 2645192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2646192895Sjamie mtx_unlock(&pr->pr_mtx); 2647192895Sjamie return (0); 2648192895Sjamie } 2649191673Sjamie if (pr->pr_ip4 == NULL) { 2650191673Sjamie mtx_unlock(&pr->pr_mtx); 2651188144Sjamie return (EAFNOSUPPORT); 2652191673Sjamie } 2653185435Sbz 2654191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2655191673Sjamie mtx_unlock(&pr->pr_mtx); 2656185435Sbz return (0); 2657185435Sbz} 2658185435Sbz 2659185435Sbz/* 2660192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2661192895Sjamie */ 2662192895Sjamieint 2663192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2664192895Sjamie{ 2665192895Sjamie 2666192895Sjamie if (pr1 == pr2) 2667192895Sjamie return (1); 2668192895Sjamie 2669192895Sjamie /* 2670192895Sjamie * jail_set maintains an exclusive hold on allprison_lock while it 2671192895Sjamie * changes the IP addresses, so only a shared hold is needed. This is 2672192895Sjamie * easier than locking the two prisons which would require finding the 2673192895Sjamie * proper locking order and end up needing allprison_lock anyway. 2674192895Sjamie */ 2675192895Sjamie sx_slock(&allprison_lock); 2676192895Sjamie while (pr1 != &prison0 && !(pr1->pr_flags & PR_IP4_USER)) 2677192895Sjamie pr1 = pr1->pr_parent; 2678192895Sjamie while (pr2 != &prison0 && !(pr2->pr_flags & PR_IP4_USER)) 2679192895Sjamie pr2 = pr2->pr_parent; 2680192895Sjamie sx_sunlock(&allprison_lock); 2681192895Sjamie return (pr1 == pr2); 2682192895Sjamie} 2683192895Sjamie 2684192895Sjamie/* 2685185435Sbz * Make sure our (source) address is set to something meaningful to this 2686185435Sbz * jail. 2687185435Sbz * 2688192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2689192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2690192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2691185435Sbz */ 2692185435Sbzint 2693185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2694185435Sbz{ 2695191673Sjamie struct prison *pr; 2696185435Sbz struct in_addr ia0; 2697191673Sjamie int error; 2698185435Sbz 2699185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2700185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2701185435Sbz 2702192895Sjamie pr = cred->cr_prison; 2703192895Sjamie if (!(pr->pr_flags & PR_IP4)) 270446155Sphk return (0); 2705191673Sjamie mtx_lock(&pr->pr_mtx); 2706192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2707192895Sjamie mtx_unlock(&pr->pr_mtx); 2708192895Sjamie return (0); 2709192895Sjamie } 2710191673Sjamie if (pr->pr_ip4 == NULL) { 2711191673Sjamie mtx_unlock(&pr->pr_mtx); 2712188144Sjamie return (EAFNOSUPPORT); 2713191673Sjamie } 2714185435Sbz 2715185435Sbz ia0.s_addr = ntohl(ia->s_addr); 2716185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 2717191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2718191673Sjamie mtx_unlock(&pr->pr_mtx); 2719185435Sbz return (0); 272046155Sphk } 2721185435Sbz 2722188144Sjamie if (ia0.s_addr == INADDR_ANY) { 2723188144Sjamie /* 2724188144Sjamie * In case there is only 1 IPv4 address, bind directly. 2725188144Sjamie */ 2726191673Sjamie if (pr->pr_ip4s == 1) 2727191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2728191673Sjamie mtx_unlock(&pr->pr_mtx); 2729185435Sbz return (0); 2730185435Sbz } 2731185435Sbz 2732191673Sjamie error = _prison_check_ip4(pr, ia); 2733191673Sjamie mtx_unlock(&pr->pr_mtx); 2734191673Sjamie return (error); 2735185435Sbz} 2736185435Sbz 2737185435Sbz/* 2738185435Sbz * Rewrite destination address in case we will connect to loopback address. 2739185435Sbz * 2740188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2741188144Sjamie * Address passed in in NBO and returned in NBO. 2742185435Sbz */ 2743185435Sbzint 2744185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2745185435Sbz{ 2746191673Sjamie struct prison *pr; 2747185435Sbz 2748185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2749185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2750185435Sbz 2751192895Sjamie pr = cred->cr_prison; 2752192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2753185435Sbz return (0); 2754191673Sjamie mtx_lock(&pr->pr_mtx); 2755192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2756192895Sjamie mtx_unlock(&pr->pr_mtx); 2757192895Sjamie return (0); 2758192895Sjamie } 2759191673Sjamie if (pr->pr_ip4 == NULL) { 2760191673Sjamie mtx_unlock(&pr->pr_mtx); 2761188144Sjamie return (EAFNOSUPPORT); 2762191673Sjamie } 2763188144Sjamie 2764185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2765191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2766191673Sjamie mtx_unlock(&pr->pr_mtx); 2767185435Sbz return (0); 2768185435Sbz } 2769185435Sbz 2770185435Sbz /* 2771185435Sbz * Return success because nothing had to be changed. 2772185435Sbz */ 2773191673Sjamie mtx_unlock(&pr->pr_mtx); 2774185435Sbz return (0); 2775185435Sbz} 2776185435Sbz 2777185435Sbz/* 2778188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 2779185435Sbz * 2780192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2781192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2782192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 2783185435Sbz */ 2784185435Sbzstatic int 2785185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 2786185435Sbz{ 2787185435Sbz int i, a, z, d; 2788185435Sbz 2789185435Sbz /* 2790185435Sbz * Check the primary IP. 2791185435Sbz */ 2792185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 2793188144Sjamie return (0); 2794185435Sbz 2795185435Sbz /* 2796185435Sbz * All the other IPs are sorted so we can do a binary search. 2797185435Sbz */ 2798185435Sbz a = 0; 2799185435Sbz z = pr->pr_ip4s - 2; 2800185435Sbz while (a <= z) { 2801185435Sbz i = (a + z) / 2; 2802185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2803185435Sbz if (d > 0) 2804185435Sbz z = i - 1; 2805185435Sbz else if (d < 0) 2806185435Sbz a = i + 1; 280781114Srwatson else 2808188144Sjamie return (0); 2809185435Sbz } 2810188144Sjamie 2811188144Sjamie return (EADDRNOTAVAIL); 2812185435Sbz} 2813185435Sbz 2814185435Sbzint 2815185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 2816185435Sbz{ 2817191673Sjamie struct prison *pr; 2818191673Sjamie int error; 2819185435Sbz 2820185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2821185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2822185435Sbz 2823192895Sjamie pr = cred->cr_prison; 2824192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2825188144Sjamie return (0); 2826191673Sjamie mtx_lock(&pr->pr_mtx); 2827192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2828192895Sjamie mtx_unlock(&pr->pr_mtx); 2829192895Sjamie return (0); 2830192895Sjamie } 2831191673Sjamie if (pr->pr_ip4 == NULL) { 2832191673Sjamie mtx_unlock(&pr->pr_mtx); 2833188144Sjamie return (EAFNOSUPPORT); 2834191673Sjamie } 2835185435Sbz 2836191673Sjamie error = _prison_check_ip4(pr, ia); 2837191673Sjamie mtx_unlock(&pr->pr_mtx); 2838191673Sjamie return (error); 2839185435Sbz} 2840185435Sbz#endif 2841185435Sbz 2842185435Sbz#ifdef INET6 2843192895Sjamiestatic int 2844192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2845192895Sjamie{ 2846192895Sjamie int ii, ij, used; 2847192895Sjamie struct prison *ppr; 2848192895Sjamie 2849192895Sjamie ppr = pr->pr_parent; 2850192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 2851192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2852192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 2853192895Sjamie /* 2854192895Sjamie * There's no room for the parent's list. Use the 2855192895Sjamie * new list buffer, which is assumed to be big enough 2856192895Sjamie * (if it was passed). If there's no buffer, try to 2857192895Sjamie * allocate one. 2858192895Sjamie */ 2859192895Sjamie used = 1; 2860192895Sjamie if (newip6 == NULL) { 2861192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 2862192895Sjamie M_PRISON, M_NOWAIT); 2863192895Sjamie if (newip6 != NULL) 2864192895Sjamie used = 0; 2865192895Sjamie } 2866192895Sjamie if (newip6 != NULL) { 2867192895Sjamie bcopy(ppr->pr_ip6, newip6, 2868192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 2869192895Sjamie free(pr->pr_ip6, M_PRISON); 2870192895Sjamie pr->pr_ip6 = newip6; 2871192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2872192895Sjamie pr->pr_flags |= PR_IP6; 2873192895Sjamie } 2874192895Sjamie return (used); 2875192895Sjamie } 2876192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 2877192895Sjamie if (pr->pr_ip6s > 0) 2878192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 2879192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 2880192895Sjamie else if (pr->pr_ip6 != NULL) { 2881192895Sjamie free(pr->pr_ip6, M_PRISON); 2882192895Sjamie pr->pr_ip6 = NULL; 2883192895Sjamie } 2884192895Sjamie pr->pr_flags = 2885192895Sjamie (pr->pr_flags & ~PR_IP6) | (ppr->pr_flags & PR_IP6); 2886192895Sjamie } else if (pr->pr_ip6s > 0 && (ppr->pr_flags & PR_IP6)) { 2887192895Sjamie /* Remove addresses that aren't in the parent. */ 2888192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 2889192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 2890192895Sjamie &ppr->pr_ip6[ij])) 2891192895Sjamie break; 2892192895Sjamie if (ij < ppr->pr_ip6s) 2893192895Sjamie ii = 1; 2894192895Sjamie else { 2895192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 2896192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2897192895Sjamie ii = 0; 2898192895Sjamie } 2899192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 2900192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 2901192895Sjamie &ppr->pr_ip6[0])) { 2902192895Sjamie ii++; 2903192895Sjamie continue; 2904192895Sjamie } 2905192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2906192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 2907192895Sjamie case -1: 2908192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 2909192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 2910192895Sjamie break; 2911192895Sjamie case 0: 2912192895Sjamie ii++; 2913192895Sjamie ij++; 2914192895Sjamie break; 2915192895Sjamie case 1: 2916192895Sjamie ij++; 2917192895Sjamie break; 2918192895Sjamie } 2919192895Sjamie } 2920192895Sjamie if (pr->pr_ip6s == 0) { 2921192895Sjamie free(pr->pr_ip6, M_PRISON); 2922192895Sjamie pr->pr_ip6 = NULL; 2923192895Sjamie } 2924192895Sjamie } 2925192895Sjamie return 0; 2926192895Sjamie} 2927192895Sjamie 2928185435Sbz/* 2929185435Sbz * Pass back primary IPv6 address for this jail. 2930185435Sbz * 2931192895Sjamie * If not restricted return success but do not alter the address. Caller has 2932192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 2933185435Sbz * 2934188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 2935185435Sbz */ 2936185435Sbzint 2937187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 2938185435Sbz{ 2939191673Sjamie struct prison *pr; 2940185435Sbz 2941185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2942185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 2943185435Sbz 2944192895Sjamie pr = cred->cr_prison; 2945192895Sjamie if (!(pr->pr_flags & PR_IP6)) 294681114Srwatson return (0); 2947191673Sjamie mtx_lock(&pr->pr_mtx); 2948192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 2949192895Sjamie mtx_unlock(&pr->pr_mtx); 2950192895Sjamie return (0); 2951192895Sjamie } 2952191673Sjamie if (pr->pr_ip6 == NULL) { 2953191673Sjamie mtx_unlock(&pr->pr_mtx); 2954188144Sjamie return (EAFNOSUPPORT); 2955191673Sjamie } 2956188144Sjamie 2957191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 2958191673Sjamie mtx_unlock(&pr->pr_mtx); 2959185435Sbz return (0); 2960185435Sbz} 2961185435Sbz 2962185435Sbz/* 2963192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 2964192895Sjamie */ 2965192895Sjamieint 2966192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 2967192895Sjamie{ 2968192895Sjamie 2969192895Sjamie if (pr1 == pr2) 2970192895Sjamie return (1); 2971192895Sjamie 2972192895Sjamie sx_slock(&allprison_lock); 2973192895Sjamie while (pr1 != &prison0 && !(pr1->pr_flags & PR_IP6_USER)) 2974192895Sjamie pr1 = pr1->pr_parent; 2975192895Sjamie while (pr2 != &prison0 && !(pr2->pr_flags & PR_IP6_USER)) 2976192895Sjamie pr2 = pr2->pr_parent; 2977192895Sjamie sx_sunlock(&allprison_lock); 2978192895Sjamie return (pr1 == pr2); 2979192895Sjamie} 2980192895Sjamie 2981192895Sjamie/* 2982185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 2983185435Sbz * 2984185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 2985185435Sbz * when needed while binding. 2986185435Sbz * 2987192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 2988192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2989192895Sjamie * doesn't allow IPv6. 2990185435Sbz */ 2991185435Sbzint 2992185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 2993185435Sbz{ 2994191673Sjamie struct prison *pr; 2995191673Sjamie int error; 2996185435Sbz 2997185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2998185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 2999185435Sbz 3000192895Sjamie pr = cred->cr_prison; 3001192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3002185435Sbz return (0); 3003191673Sjamie mtx_lock(&pr->pr_mtx); 3004192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3005192895Sjamie mtx_unlock(&pr->pr_mtx); 3006192895Sjamie return (0); 3007192895Sjamie } 3008191673Sjamie if (pr->pr_ip6 == NULL) { 3009191673Sjamie mtx_unlock(&pr->pr_mtx); 3010188144Sjamie return (EAFNOSUPPORT); 3011191673Sjamie } 3012188144Sjamie 3013185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3014191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3015191673Sjamie mtx_unlock(&pr->pr_mtx); 3016185435Sbz return (0); 301781114Srwatson } 3018185435Sbz 3019188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3020188144Sjamie /* 3021188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3022188144Sjamie * then bind directly. 3023188144Sjamie */ 3024191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3025191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3026191673Sjamie mtx_unlock(&pr->pr_mtx); 3027185435Sbz return (0); 3028185435Sbz } 3029188144Sjamie 3030191673Sjamie error = _prison_check_ip6(pr, ia6); 3031191673Sjamie mtx_unlock(&pr->pr_mtx); 3032191673Sjamie return (error); 3033185435Sbz} 3034185435Sbz 3035185435Sbz/* 3036185435Sbz * Rewrite destination address in case we will connect to loopback address. 3037185435Sbz * 3038188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3039185435Sbz */ 3040185435Sbzint 3041185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3042185435Sbz{ 3043191673Sjamie struct prison *pr; 3044185435Sbz 3045185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3046185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3047185435Sbz 3048192895Sjamie pr = cred->cr_prison; 3049192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3050185435Sbz return (0); 3051191673Sjamie mtx_lock(&pr->pr_mtx); 3052192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3053192895Sjamie mtx_unlock(&pr->pr_mtx); 3054192895Sjamie return (0); 3055192895Sjamie } 3056191673Sjamie if (pr->pr_ip6 == NULL) { 3057191673Sjamie mtx_unlock(&pr->pr_mtx); 3058188144Sjamie return (EAFNOSUPPORT); 3059191673Sjamie } 3060188144Sjamie 3061185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3062191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3063191673Sjamie mtx_unlock(&pr->pr_mtx); 3064185435Sbz return (0); 3065185435Sbz } 3066185435Sbz 3067185435Sbz /* 3068185435Sbz * Return success because nothing had to be changed. 3069185435Sbz */ 3070191673Sjamie mtx_unlock(&pr->pr_mtx); 307146155Sphk return (0); 307246155Sphk} 307346155Sphk 3074185435Sbz/* 3075188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3076185435Sbz * 3077192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3078192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3079192895Sjamie * doesn't allow IPv6. 3080185435Sbz */ 3081185435Sbzstatic int 3082185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 308346155Sphk{ 3084185435Sbz int i, a, z, d; 308546155Sphk 3086185435Sbz /* 3087185435Sbz * Check the primary IP. 3088185435Sbz */ 3089185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3090188144Sjamie return (0); 3091185435Sbz 3092185435Sbz /* 3093185435Sbz * All the other IPs are sorted so we can do a binary search. 3094185435Sbz */ 3095185435Sbz a = 0; 3096185435Sbz z = pr->pr_ip6s - 2; 3097185435Sbz while (a <= z) { 3098185435Sbz i = (a + z) / 2; 3099185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3100185435Sbz if (d > 0) 3101185435Sbz z = i - 1; 3102185435Sbz else if (d < 0) 3103185435Sbz a = i + 1; 310446155Sphk else 3105188144Sjamie return (0); 310646155Sphk } 3107188144Sjamie 3108188144Sjamie return (EADDRNOTAVAIL); 310946155Sphk} 311046155Sphk 311146155Sphkint 3112185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3113185435Sbz{ 3114191673Sjamie struct prison *pr; 3115191673Sjamie int error; 3116185435Sbz 3117185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3118185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3119185435Sbz 3120192895Sjamie pr = cred->cr_prison; 3121192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3122188144Sjamie return (0); 3123191673Sjamie mtx_lock(&pr->pr_mtx); 3124192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3125192895Sjamie mtx_unlock(&pr->pr_mtx); 3126192895Sjamie return (0); 3127192895Sjamie } 3128191673Sjamie if (pr->pr_ip6 == NULL) { 3129191673Sjamie mtx_unlock(&pr->pr_mtx); 3130188144Sjamie return (EAFNOSUPPORT); 3131191673Sjamie } 3132185435Sbz 3133191673Sjamie error = _prison_check_ip6(pr, ia6); 3134191673Sjamie mtx_unlock(&pr->pr_mtx); 3135191673Sjamie return (error); 3136185435Sbz} 3137185435Sbz#endif 3138185435Sbz 3139185435Sbz/* 3140188146Sjamie * Check if a jail supports the given address family. 3141188146Sjamie * 3142188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3143188146Sjamie * if not. 3144188146Sjamie */ 3145188146Sjamieint 3146188146Sjamieprison_check_af(struct ucred *cred, int af) 3147188146Sjamie{ 3148192895Sjamie struct prison *pr; 3149188146Sjamie int error; 3150188146Sjamie 3151188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3152188146Sjamie 3153192895Sjamie pr = cred->cr_prison; 3154194915Sjamie /* Prisons with their own network stack are not limited. */ 3155194915Sjamie if (pr->pr_flags & PR_VNET) 3156194915Sjamie return (0); 3157194915Sjamie 3158188146Sjamie error = 0; 3159188146Sjamie switch (af) 3160188146Sjamie { 3161188146Sjamie#ifdef INET 3162188146Sjamie case AF_INET: 3163192895Sjamie if (pr->pr_flags & PR_IP4) 3164192895Sjamie { 3165192895Sjamie mtx_lock(&pr->pr_mtx); 3166192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3167192895Sjamie error = EAFNOSUPPORT; 3168192895Sjamie mtx_unlock(&pr->pr_mtx); 3169192895Sjamie } 3170188146Sjamie break; 3171188146Sjamie#endif 3172188146Sjamie#ifdef INET6 3173188146Sjamie case AF_INET6: 3174192895Sjamie if (pr->pr_flags & PR_IP6) 3175192895Sjamie { 3176192895Sjamie mtx_lock(&pr->pr_mtx); 3177192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3178192895Sjamie error = EAFNOSUPPORT; 3179192895Sjamie mtx_unlock(&pr->pr_mtx); 3180192895Sjamie } 3181188146Sjamie break; 3182188146Sjamie#endif 3183188146Sjamie case AF_LOCAL: 3184188146Sjamie case AF_ROUTE: 3185188146Sjamie break; 3186188146Sjamie default: 3187192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3188188146Sjamie error = EAFNOSUPPORT; 3189188146Sjamie } 3190188146Sjamie return (error); 3191188146Sjamie} 3192188146Sjamie 3193188146Sjamie/* 3194185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3195185435Sbz * prison_check_ip[46]). 3196185435Sbz * 3197192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3198192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3199192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3200185435Sbz */ 3201185435Sbzint 320272786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 320346155Sphk{ 3204185435Sbz#ifdef INET 3205114168Smike struct sockaddr_in *sai; 3206185435Sbz#endif 3207185435Sbz#ifdef INET6 3208185435Sbz struct sockaddr_in6 *sai6; 3209185435Sbz#endif 3210188144Sjamie int error; 321146155Sphk 3212185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3213185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3214185435Sbz 3215188144Sjamie error = 0; 3216188144Sjamie switch (sa->sa_family) 3217185435Sbz { 3218185435Sbz#ifdef INET 3219185435Sbz case AF_INET: 3220185435Sbz sai = (struct sockaddr_in *)sa; 3221188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3222185435Sbz break; 3223185435Sbz#endif 3224185435Sbz#ifdef INET6 3225185435Sbz case AF_INET6: 3226185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3227188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3228185435Sbz break; 3229185435Sbz#endif 3230185435Sbz default: 3231192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3232188144Sjamie error = EAFNOSUPPORT; 3233185435Sbz } 3234188144Sjamie return (error); 323546155Sphk} 323672786Srwatson 323772786Srwatson/* 323872786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 323972786Srwatson */ 324072786Srwatsonint 3241114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 324272786Srwatson{ 324372786Srwatson 3244191915Szec#ifdef VIMAGE 3245191915Szec if (cred2->cr_vimage->v_procg != cred1->cr_vimage->v_procg) 3246191915Szec return (ESRCH); 3247191915Szec#endif 3248192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3249192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3250192895Sjamie} 325172786Srwatson 3252192895Sjamie/* 3253192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3254192895Sjamie */ 3255192895Sjamieint 3256192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3257192895Sjamie{ 3258192895Sjamie 3259192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3260192895Sjamie if (pr1 == pr2) 3261192895Sjamie return (1); 326272786Srwatson return (0); 326372786Srwatson} 326472786Srwatson 326572786Srwatson/* 326672786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 326772786Srwatson */ 326872786Srwatsonint 3269114168Smikejailed(struct ucred *cred) 327072786Srwatson{ 327172786Srwatson 3272192895Sjamie return (cred->cr_prison != &prison0); 327372786Srwatson} 327491384Srobert 327591384Srobert/* 3276194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 327791384Srobert */ 327891391Srobertvoid 3279114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 328091384Srobert{ 3281193066Sjamie struct prison *pr; 328291384Srobert 3283194090Sjamie /* 3284194090Sjamie * A NULL credential can be used to shortcut to the physical 3285194090Sjamie * system's hostname. 3286194090Sjamie */ 3287193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3288193066Sjamie mtx_lock(&pr->pr_mtx); 3289194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3290193066Sjamie mtx_unlock(&pr->pr_mtx); 329191384Srobert} 3292113275Smike 3293194090Sjamievoid 3294194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3295194090Sjamie{ 3296194090Sjamie 3297194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3298194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3299194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3300194090Sjamie} 3301194090Sjamie 3302194090Sjamievoid 3303194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3304194090Sjamie{ 3305194090Sjamie 3306194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3307194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3308194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3309194090Sjamie} 3310194090Sjamie 3311194090Sjamievoid 3312194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3313194090Sjamie{ 3314194090Sjamie 3315194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3316194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3317194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3318194090Sjamie} 3319194090Sjamie 3320125804Srwatson/* 3321147185Spjd * Determine whether the subject represented by cred can "see" 3322147185Spjd * status of a mount point. 3323147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3324147185Spjd * XXX: This function should be called cr_canseemount() and should be 3325147185Spjd * placed in kern_prot.c. 3326125804Srwatson */ 3327125804Srwatsonint 3328147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3329125804Srwatson{ 3330147185Spjd struct prison *pr; 3331147185Spjd struct statfs *sp; 3332147185Spjd size_t len; 3333125804Srwatson 3334192895Sjamie pr = cred->cr_prison; 3335192895Sjamie if (pr->pr_enforce_statfs == 0) 3336147185Spjd return (0); 3337147185Spjd if (pr->pr_root->v_mount == mp) 3338147185Spjd return (0); 3339192895Sjamie if (pr->pr_enforce_statfs == 2) 3340147185Spjd return (ENOENT); 3341147185Spjd /* 3342147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3343147185Spjd * all mount-points from inside a jail. 3344147185Spjd * This is ugly check, but this is the only situation when jail's 3345147185Spjd * directory ends with '/'. 3346147185Spjd */ 3347147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3348147185Spjd return (0); 3349147185Spjd len = strlen(pr->pr_path); 3350147185Spjd sp = &mp->mnt_stat; 3351147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3352147185Spjd return (ENOENT); 3353147185Spjd /* 3354147185Spjd * Be sure that we don't have situation where jail's root directory 3355147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3356147185Spjd */ 3357147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3358147185Spjd return (ENOENT); 3359147185Spjd return (0); 3360147185Spjd} 3361147185Spjd 3362147185Spjdvoid 3363147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3364147185Spjd{ 3365147185Spjd char jpath[MAXPATHLEN]; 3366147185Spjd struct prison *pr; 3367147185Spjd size_t len; 3368147185Spjd 3369192895Sjamie pr = cred->cr_prison; 3370192895Sjamie if (pr->pr_enforce_statfs == 0) 3371147185Spjd return; 3372147185Spjd if (prison_canseemount(cred, mp) != 0) { 3373147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3374147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3375147185Spjd sizeof(sp->f_mntonname)); 3376147185Spjd return; 3377125804Srwatson } 3378147185Spjd if (pr->pr_root->v_mount == mp) { 3379147185Spjd /* 3380147185Spjd * Clear current buffer data, so we are sure nothing from 3381147185Spjd * the valid path left there. 3382147185Spjd */ 3383147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3384147185Spjd *sp->f_mntonname = '/'; 3385147185Spjd return; 3386147185Spjd } 3387147185Spjd /* 3388147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3389147185Spjd * all mount-points from inside a jail. 3390147185Spjd */ 3391147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3392147185Spjd return; 3393147185Spjd len = strlen(pr->pr_path); 3394147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3395147185Spjd /* 3396147185Spjd * Clear current buffer data, so we are sure nothing from 3397147185Spjd * the valid path left there. 3398147185Spjd */ 3399147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3400147185Spjd if (*jpath == '\0') { 3401147185Spjd /* Should never happen. */ 3402147185Spjd *sp->f_mntonname = '/'; 3403147185Spjd } else { 3404147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3405147185Spjd } 3406125804Srwatson} 3407125804Srwatson 3408164032Srwatson/* 3409164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3410164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3411164032Srwatson */ 3412164032Srwatsonint 3413164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3414164032Srwatson{ 3415164032Srwatson 3416164032Srwatson if (!jailed(cred)) 3417164032Srwatson return (0); 3418164032Srwatson 3419194915Sjamie#ifdef VIMAGE 3420194915Sjamie /* 3421194915Sjamie * Privileges specific to prisons with a virtual network stack. 3422194915Sjamie * There might be a duplicate entry here in case the privilege 3423194915Sjamie * is only granted conditionally in the legacy jail case. 3424194915Sjamie */ 3425164032Srwatson switch (priv) { 3426194915Sjamie#ifdef notyet 3427194915Sjamie /* 3428194915Sjamie * NFS-specific privileges. 3429194915Sjamie */ 3430194915Sjamie case PRIV_NFS_DAEMON: 3431194915Sjamie case PRIV_NFS_LOCKD: 3432194915Sjamie#endif 3433194915Sjamie /* 3434194915Sjamie * Network stack privileges. 3435194915Sjamie */ 3436194915Sjamie case PRIV_NET_BRIDGE: 3437194915Sjamie case PRIV_NET_GRE: 3438194915Sjamie case PRIV_NET_BPF: 3439194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3440194915Sjamie case PRIV_NET_ROUTE: 3441194915Sjamie case PRIV_NET_TAP: 3442194915Sjamie case PRIV_NET_SETIFMTU: 3443194915Sjamie case PRIV_NET_SETIFFLAGS: 3444194915Sjamie case PRIV_NET_SETIFCAP: 3445194915Sjamie case PRIV_NET_SETIFNAME : 3446194915Sjamie case PRIV_NET_SETIFMETRIC: 3447194915Sjamie case PRIV_NET_SETIFPHYS: 3448194915Sjamie case PRIV_NET_SETIFMAC: 3449194915Sjamie case PRIV_NET_ADDMULTI: 3450194915Sjamie case PRIV_NET_DELMULTI: 3451194915Sjamie case PRIV_NET_HWIOCTL: 3452194915Sjamie case PRIV_NET_SETLLADDR: 3453194915Sjamie case PRIV_NET_ADDIFGROUP: 3454194915Sjamie case PRIV_NET_DELIFGROUP: 3455194915Sjamie case PRIV_NET_IFCREATE: 3456194915Sjamie case PRIV_NET_IFDESTROY: 3457194915Sjamie case PRIV_NET_ADDIFADDR: 3458194915Sjamie case PRIV_NET_DELIFADDR: 3459194915Sjamie case PRIV_NET_LAGG: 3460194915Sjamie case PRIV_NET_GIF: 3461194915Sjamie case PRIV_NET_SETIFVNET: 3462164032Srwatson 3463164032Srwatson /* 3464194915Sjamie * 802.11-related privileges. 3465194915Sjamie */ 3466194915Sjamie case PRIV_NET80211_GETKEY: 3467194915Sjamie#ifdef notyet 3468194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3469194915Sjamie#endif 3470194915Sjamie 3471194915Sjamie#ifdef notyet 3472194915Sjamie /* 3473194915Sjamie * AppleTalk privileges. 3474194915Sjamie */ 3475194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3476194915Sjamie 3477194915Sjamie /* 3478194915Sjamie * ATM privileges. 3479194915Sjamie */ 3480194915Sjamie case PRIV_NETATM_CFG: 3481194915Sjamie case PRIV_NETATM_ADD: 3482194915Sjamie case PRIV_NETATM_DEL: 3483194915Sjamie case PRIV_NETATM_SET: 3484194915Sjamie 3485194915Sjamie /* 3486194915Sjamie * Bluetooth privileges. 3487194915Sjamie */ 3488194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3489194915Sjamie#endif 3490194915Sjamie 3491194915Sjamie /* 3492194915Sjamie * Netgraph and netgraph module privileges. 3493194915Sjamie */ 3494194915Sjamie case PRIV_NETGRAPH_CONTROL: 3495194915Sjamie#ifdef notyet 3496194915Sjamie case PRIV_NETGRAPH_TTY: 3497194915Sjamie#endif 3498194915Sjamie 3499194915Sjamie /* 3500194915Sjamie * IPv4 and IPv6 privileges. 3501194915Sjamie */ 3502194915Sjamie case PRIV_NETINET_IPFW: 3503194915Sjamie case PRIV_NETINET_DIVERT: 3504194915Sjamie case PRIV_NETINET_PF: 3505194915Sjamie case PRIV_NETINET_DUMMYNET: 3506194915Sjamie case PRIV_NETINET_CARP: 3507194915Sjamie case PRIV_NETINET_MROUTE: 3508194915Sjamie case PRIV_NETINET_RAW: 3509194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3510194915Sjamie case PRIV_NETINET_ND6: 3511194915Sjamie case PRIV_NETINET_SCOPE6: 3512194915Sjamie case PRIV_NETINET_ALIFETIME6: 3513194915Sjamie case PRIV_NETINET_IPSEC: 3514194915Sjamie case PRIV_NETINET_BINDANY: 3515194915Sjamie 3516194915Sjamie#ifdef notyet 3517194915Sjamie /* 3518194915Sjamie * IPX/SPX privileges. 3519194915Sjamie */ 3520194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3521194915Sjamie case PRIV_NETIPX_RAW: 3522194915Sjamie 3523194915Sjamie /* 3524194915Sjamie * NCP privileges. 3525194915Sjamie */ 3526194915Sjamie case PRIV_NETNCP: 3527194915Sjamie 3528194915Sjamie /* 3529194915Sjamie * SMB privileges. 3530194915Sjamie */ 3531194915Sjamie case PRIV_NETSMB: 3532194915Sjamie#endif 3533194915Sjamie 3534194915Sjamie /* 3535194915Sjamie * No default: or deny here. 3536194915Sjamie * In case of no permit fall through to next switch(). 3537194915Sjamie */ 3538194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3539194915Sjamie return (0); 3540194915Sjamie } 3541194915Sjamie#endif /* VIMAGE */ 3542194915Sjamie 3543194915Sjamie switch (priv) { 3544194915Sjamie 3545194915Sjamie /* 3546164032Srwatson * Allow ktrace privileges for root in jail. 3547164032Srwatson */ 3548164032Srwatson case PRIV_KTRACE: 3549164032Srwatson 3550166827Srwatson#if 0 3551164032Srwatson /* 3552164032Srwatson * Allow jailed processes to configure audit identity and 3553164032Srwatson * submit audit records (login, etc). In the future we may 3554164032Srwatson * want to further refine the relationship between audit and 3555164032Srwatson * jail. 3556164032Srwatson */ 3557164032Srwatson case PRIV_AUDIT_GETAUDIT: 3558164032Srwatson case PRIV_AUDIT_SETAUDIT: 3559164032Srwatson case PRIV_AUDIT_SUBMIT: 3560166827Srwatson#endif 3561164032Srwatson 3562164032Srwatson /* 3563164032Srwatson * Allow jailed processes to manipulate process UNIX 3564164032Srwatson * credentials in any way they see fit. 3565164032Srwatson */ 3566164032Srwatson case PRIV_CRED_SETUID: 3567164032Srwatson case PRIV_CRED_SETEUID: 3568164032Srwatson case PRIV_CRED_SETGID: 3569164032Srwatson case PRIV_CRED_SETEGID: 3570164032Srwatson case PRIV_CRED_SETGROUPS: 3571164032Srwatson case PRIV_CRED_SETREUID: 3572164032Srwatson case PRIV_CRED_SETREGID: 3573164032Srwatson case PRIV_CRED_SETRESUID: 3574164032Srwatson case PRIV_CRED_SETRESGID: 3575164032Srwatson 3576164032Srwatson /* 3577164032Srwatson * Jail implements visibility constraints already, so allow 3578164032Srwatson * jailed root to override uid/gid-based constraints. 3579164032Srwatson */ 3580164032Srwatson case PRIV_SEEOTHERGIDS: 3581164032Srwatson case PRIV_SEEOTHERUIDS: 3582164032Srwatson 3583164032Srwatson /* 3584164032Srwatson * Jail implements inter-process debugging limits already, so 3585164032Srwatson * allow jailed root various debugging privileges. 3586164032Srwatson */ 3587164032Srwatson case PRIV_DEBUG_DIFFCRED: 3588164032Srwatson case PRIV_DEBUG_SUGID: 3589164032Srwatson case PRIV_DEBUG_UNPRIV: 3590164032Srwatson 3591164032Srwatson /* 3592164032Srwatson * Allow jail to set various resource limits and login 3593164032Srwatson * properties, and for now, exceed process resource limits. 3594164032Srwatson */ 3595164032Srwatson case PRIV_PROC_LIMIT: 3596164032Srwatson case PRIV_PROC_SETLOGIN: 3597164032Srwatson case PRIV_PROC_SETRLIMIT: 3598164032Srwatson 3599164032Srwatson /* 3600164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3601164032Srwatson */ 3602164032Srwatson case PRIV_IPC_READ: 3603164032Srwatson case PRIV_IPC_WRITE: 3604164032Srwatson case PRIV_IPC_ADMIN: 3605164032Srwatson case PRIV_IPC_MSGSIZE: 3606164032Srwatson case PRIV_MQ_ADMIN: 3607164032Srwatson 3608164032Srwatson /* 3609192895Sjamie * Jail operations within a jail work on child jails. 3610192895Sjamie */ 3611192895Sjamie case PRIV_JAIL_ATTACH: 3612192895Sjamie case PRIV_JAIL_SET: 3613192895Sjamie case PRIV_JAIL_REMOVE: 3614192895Sjamie 3615192895Sjamie /* 3616164032Srwatson * Jail implements its own inter-process limits, so allow 3617164032Srwatson * root processes in jail to change scheduling on other 3618164032Srwatson * processes in the same jail. Likewise for signalling. 3619164032Srwatson */ 3620164032Srwatson case PRIV_SCHED_DIFFCRED: 3621185435Sbz case PRIV_SCHED_CPUSET: 3622164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3623164032Srwatson case PRIV_SIGNAL_SUGID: 3624164032Srwatson 3625164032Srwatson /* 3626164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3627164032Srwatson * writable. 3628164032Srwatson */ 3629164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 3630164032Srwatson 3631164032Srwatson /* 3632164032Srwatson * Allow root in jail to manage a variety of quota 3633166831Srwatson * properties. These should likely be conditional on a 3634166831Srwatson * configuration option. 3635164032Srwatson */ 3636166832Srwatson case PRIV_VFS_GETQUOTA: 3637166832Srwatson case PRIV_VFS_SETQUOTA: 3638164032Srwatson 3639164032Srwatson /* 3640164032Srwatson * Since Jail relies on chroot() to implement file system 3641164032Srwatson * protections, grant many VFS privileges to root in jail. 3642164032Srwatson * Be careful to exclude mount-related and NFS-related 3643164032Srwatson * privileges. 3644164032Srwatson */ 3645164032Srwatson case PRIV_VFS_READ: 3646164032Srwatson case PRIV_VFS_WRITE: 3647164032Srwatson case PRIV_VFS_ADMIN: 3648164032Srwatson case PRIV_VFS_EXEC: 3649164032Srwatson case PRIV_VFS_LOOKUP: 3650164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3651164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 3652164032Srwatson case PRIV_VFS_CHOWN: 3653164032Srwatson case PRIV_VFS_CHROOT: 3654167152Spjd case PRIV_VFS_RETAINSUGID: 3655164032Srwatson case PRIV_VFS_FCHROOT: 3656164032Srwatson case PRIV_VFS_LINK: 3657164032Srwatson case PRIV_VFS_SETGID: 3658172860Srwatson case PRIV_VFS_STAT: 3659164032Srwatson case PRIV_VFS_STICKYFILE: 3660164032Srwatson return (0); 3661164032Srwatson 3662164032Srwatson /* 3663164032Srwatson * Depending on the global setting, allow privilege of 3664164032Srwatson * setting system flags. 3665164032Srwatson */ 3666164032Srwatson case PRIV_VFS_SYSFLAGS: 3667192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3668164032Srwatson return (0); 3669164032Srwatson else 3670164032Srwatson return (EPERM); 3671164032Srwatson 3672164032Srwatson /* 3673168396Spjd * Depending on the global setting, allow privilege of 3674168396Spjd * mounting/unmounting file systems. 3675168396Spjd */ 3676168396Spjd case PRIV_VFS_MOUNT: 3677168396Spjd case PRIV_VFS_UNMOUNT: 3678168396Spjd case PRIV_VFS_MOUNT_NONUSER: 3679168699Spjd case PRIV_VFS_MOUNT_OWNER: 3680192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT) 3681168396Spjd return (0); 3682168396Spjd else 3683168396Spjd return (EPERM); 3684168396Spjd 3685168396Spjd /* 3686168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 3687168591Srwatson * ports. 3688164032Srwatson */ 3689164032Srwatson case PRIV_NETINET_RESERVEDPORT: 3690168591Srwatson case PRIV_NETINET_REUSEPORT: 3691164032Srwatson return (0); 3692164032Srwatson 3693164032Srwatson /* 3694175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 3695175630Sbz */ 3696175630Sbz case PRIV_NETINET_SETHDROPTS: 3697175630Sbz return (0); 3698175630Sbz 3699175630Sbz /* 3700164032Srwatson * Conditionally allow creating raw sockets in jail. 3701164032Srwatson */ 3702164032Srwatson case PRIV_NETINET_RAW: 3703192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3704164032Srwatson return (0); 3705164032Srwatson else 3706164032Srwatson return (EPERM); 3707164032Srwatson 3708164032Srwatson /* 3709164032Srwatson * Since jail implements its own visibility limits on netstat 3710164032Srwatson * sysctls, allow getcred. This allows identd to work in 3711164032Srwatson * jail. 3712164032Srwatson */ 3713164032Srwatson case PRIV_NETINET_GETCRED: 3714164032Srwatson return (0); 3715164032Srwatson 3716164032Srwatson default: 3717164032Srwatson /* 3718164032Srwatson * In all remaining cases, deny the privilege request. This 3719164032Srwatson * includes almost all network privileges, many system 3720164032Srwatson * configuration privileges. 3721164032Srwatson */ 3722164032Srwatson return (EPERM); 3723164032Srwatson } 3724164032Srwatson} 3725164032Srwatson 3726192895Sjamie/* 3727192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 3728192895Sjamie * if it does not directly follow. 3729192895Sjamie */ 3730192895Sjamie 3731192895Sjamiechar * 3732192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 3733192895Sjamie{ 3734192895Sjamie char *name; 3735192895Sjamie 3736192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 3737192895Sjamie if (pr1 == pr2) 3738192895Sjamie return "0"; 3739192895Sjamie name = pr2->pr_name; 3740192895Sjamie if (prison_ischild(pr1, pr2)) { 3741192895Sjamie /* 3742192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 3743192895Sjamie * so its length can't be counted on. But the number of dots 3744192895Sjamie * can be counted on - and counted. 3745192895Sjamie */ 3746192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3747192895Sjamie name = strchr(name, '.') + 1; 3748192895Sjamie } 3749192895Sjamie return (name); 3750192895Sjamie} 3751192895Sjamie 3752192895Sjamie/* 3753192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 3754192895Sjamie * if it does not directly follow. 3755192895Sjamie */ 3756192895Sjamiestatic char * 3757192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 3758192895Sjamie{ 3759192895Sjamie char *path1, *path2; 3760192895Sjamie int len1; 3761192895Sjamie 3762192895Sjamie path1 = pr1->pr_path; 3763192895Sjamie path2 = pr2->pr_path; 3764192895Sjamie if (!strcmp(path1, "/")) 3765192895Sjamie return (path2); 3766192895Sjamie len1 = strlen(path1); 3767192895Sjamie if (strncmp(path1, path2, len1)) 3768192895Sjamie return (path2); 3769192895Sjamie if (path2[len1] == '\0') 3770192895Sjamie return "/"; 3771192895Sjamie if (path2[len1] == '/') 3772192895Sjamie return (path2 + len1); 3773192895Sjamie return (path2); 3774192895Sjamie} 3775192895Sjamie 3776192895Sjamie 3777192895Sjamie/* 3778192895Sjamie * Jail-related sysctls. 3779192895Sjamie */ 3780192895SjamieSYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 3781192895Sjamie "Jails"); 3782192895Sjamie 3783113275Smikestatic int 3784113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 3785113275Smike{ 3786191673Sjamie struct xprison *xp; 3787192895Sjamie struct prison *pr, *cpr; 3788191673Sjamie#ifdef INET 3789191673Sjamie struct in_addr *ip4 = NULL; 3790191673Sjamie int ip4s = 0; 3791191673Sjamie#endif 3792191673Sjamie#ifdef INET6 3793191673Sjamie struct in_addr *ip6 = NULL; 3794191673Sjamie int ip6s = 0; 3795191673Sjamie#endif 3796192895Sjamie int descend, error; 3797113275Smike 3798191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 3799192895Sjamie pr = req->td->td_ucred->cr_prison; 3800191673Sjamie error = 0; 3801168401Spjd sx_slock(&allprison_lock); 3802192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 3803192895Sjamie#if defined(INET) || defined(INET6) 3804191673Sjamie again: 3805192895Sjamie#endif 3806192895Sjamie mtx_lock(&cpr->pr_mtx); 3807185435Sbz#ifdef INET 3808192895Sjamie if (cpr->pr_ip4s > 0) { 3809192895Sjamie if (ip4s < cpr->pr_ip4s) { 3810192895Sjamie ip4s = cpr->pr_ip4s; 3811192895Sjamie mtx_unlock(&cpr->pr_mtx); 3812191673Sjamie ip4 = realloc(ip4, ip4s * 3813191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 3814191673Sjamie goto again; 3815191673Sjamie } 3816192895Sjamie bcopy(cpr->pr_ip4, ip4, 3817192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 3818191673Sjamie } 3819185435Sbz#endif 3820185435Sbz#ifdef INET6 3821192895Sjamie if (cpr->pr_ip6s > 0) { 3822192895Sjamie if (ip6s < cpr->pr_ip6s) { 3823192895Sjamie ip6s = cpr->pr_ip6s; 3824192895Sjamie mtx_unlock(&cpr->pr_mtx); 3825191673Sjamie ip6 = realloc(ip6, ip6s * 3826191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 3827191673Sjamie goto again; 3828191673Sjamie } 3829192895Sjamie bcopy(cpr->pr_ip6, ip6, 3830192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 3831191673Sjamie } 3832185435Sbz#endif 3833192895Sjamie if (cpr->pr_ref == 0) { 3834192895Sjamie mtx_unlock(&cpr->pr_mtx); 3835191673Sjamie continue; 3836191673Sjamie } 3837191673Sjamie bzero(xp, sizeof(*xp)); 3838113275Smike xp->pr_version = XPRISON_VERSION; 3839192895Sjamie xp->pr_id = cpr->pr_id; 3840192895Sjamie xp->pr_state = cpr->pr_uref > 0 3841191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 3842192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 3843194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 3844192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 3845185435Sbz#ifdef INET 3846192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 3847185435Sbz#endif 3848185435Sbz#ifdef INET6 3849192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 3850185435Sbz#endif 3851192895Sjamie mtx_unlock(&cpr->pr_mtx); 3852191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 3853191673Sjamie if (error) 3854191673Sjamie break; 3855185435Sbz#ifdef INET 3856191673Sjamie if (xp->pr_ip4s > 0) { 3857191673Sjamie error = SYSCTL_OUT(req, ip4, 3858191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 3859191673Sjamie if (error) 3860191673Sjamie break; 3861185435Sbz } 3862185435Sbz#endif 3863185435Sbz#ifdef INET6 3864191673Sjamie if (xp->pr_ip6s > 0) { 3865191673Sjamie error = SYSCTL_OUT(req, ip6, 3866191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 3867191673Sjamie if (error) 3868191673Sjamie break; 3869185435Sbz } 3870185435Sbz#endif 3871113275Smike } 3872168401Spjd sx_sunlock(&allprison_lock); 3873191673Sjamie free(xp, M_TEMP); 3874191673Sjamie#ifdef INET 3875191673Sjamie free(ip4, M_TEMP); 3876191673Sjamie#endif 3877191673Sjamie#ifdef INET6 3878191673Sjamie free(ip6, M_TEMP); 3879191673Sjamie#endif 3880167354Spjd return (error); 3881113275Smike} 3882113275Smike 3883187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 3884187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 3885187864Sed sysctl_jail_list, "S", "List of active jails"); 3886126004Spjd 3887126004Spjdstatic int 3888126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 3889126004Spjd{ 3890126004Spjd int error, injail; 3891126004Spjd 3892126004Spjd injail = jailed(req->td->td_ucred); 3893126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 3894126004Spjd 3895126004Spjd return (error); 3896126004Spjd} 3897192895Sjamie 3898187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 3899187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 3900187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 3901185435Sbz 3902192895Sjamie#if defined(INET) || defined(INET6) 3903193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 3904192895Sjamie &jail_max_af_ips, 0, 3905192895Sjamie "Number of IP addresses a jail may have at most per address family"); 3906192895Sjamie#endif 3907192895Sjamie 3908192895Sjamie/* 3909192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 3910192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 3911192895Sjamie * just see their own parameters, and can't change them. 3912192895Sjamie */ 3913192895Sjamiestatic int 3914192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 3915192895Sjamie{ 3916192895Sjamie struct prison *pr; 3917192895Sjamie int allow, error, i; 3918192895Sjamie 3919192895Sjamie pr = req->td->td_ucred->cr_prison; 3920192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 3921192895Sjamie 3922192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 3923192895Sjamie i = (allow & arg2) ? 1 : 0; 3924192895Sjamie if (arg1 != NULL) 3925192895Sjamie i = !i; 3926192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 3927192895Sjamie if (error || !req->newptr) 3928192895Sjamie return (error); 3929192895Sjamie i = i ? arg2 : 0; 3930192895Sjamie if (arg1 != NULL) 3931192895Sjamie i ^= arg2; 3932192895Sjamie /* 3933192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 3934192895Sjamie * for writing. 3935192895Sjamie */ 3936192895Sjamie mtx_lock(&prison0.pr_mtx); 3937192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 3938192895Sjamie mtx_unlock(&prison0.pr_mtx); 3939192895Sjamie return (0); 3940192895Sjamie} 3941192895Sjamie 3942192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 3943192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3944192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 3945192895Sjamie "Processes in jail can set their hostnames"); 3946192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 3947192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3948192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 3949192895Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only"); 3950192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 3951192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3952192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 3953192895Sjamie "Processes in jail can use System V IPC primitives"); 3954192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 3955192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3956192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 3957192895Sjamie "Prison root can create raw sockets"); 3958192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 3959192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3960192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 3961192895Sjamie "Processes in jail can alter system file flags"); 3962192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 3963192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3964192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 3965192895Sjamie "Processes in jail can mount/unmount jail-friendly file systems"); 3966192895Sjamie 3967192895Sjamiestatic int 3968192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 3969192895Sjamie{ 3970192895Sjamie struct prison *pr; 3971192895Sjamie int level, error; 3972192895Sjamie 3973192895Sjamie pr = req->td->td_ucred->cr_prison; 3974192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 3975192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 3976192895Sjamie if (error || !req->newptr) 3977192895Sjamie return (error); 3978192895Sjamie *(int *)arg1 = level; 3979192895Sjamie return (0); 3980192895Sjamie} 3981192895Sjamie 3982192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 3983192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 3984192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 3985192895Sjamie sysctl_jail_default_level, "I", 3986192895Sjamie "Processes in jail cannot see all mounted file systems"); 3987192895Sjamie 3988192895Sjamie/* 3989192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 3990192895Sjamie * is returned in the string itself, and the other parameters exist merely 3991192895Sjamie * to make themselves and their types known. 3992192895Sjamie */ 3993192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 3994192895Sjamie "Jail parameters"); 3995192895Sjamie 3996192895Sjamieint 3997192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 3998192895Sjamie{ 3999192895Sjamie int i; 4000192895Sjamie long l; 4001192895Sjamie size_t s; 4002192895Sjamie char numbuf[12]; 4003192895Sjamie 4004192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4005192895Sjamie { 4006192895Sjamie case CTLTYPE_LONG: 4007192895Sjamie case CTLTYPE_ULONG: 4008192895Sjamie l = 0; 4009192895Sjamie#ifdef SCTL_MASK32 4010192895Sjamie if (!(req->flags & SCTL_MASK32)) 4011192895Sjamie#endif 4012192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4013192895Sjamie case CTLTYPE_INT: 4014192895Sjamie case CTLTYPE_UINT: 4015192895Sjamie i = 0; 4016192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4017192895Sjamie case CTLTYPE_STRING: 4018192895Sjamie snprintf(numbuf, sizeof(numbuf), "%d", arg2); 4019192895Sjamie return 4020192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4021192895Sjamie case CTLTYPE_STRUCT: 4022192895Sjamie s = (size_t)arg2; 4023192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4024192895Sjamie } 4025192895Sjamie return (0); 4026192895Sjamie} 4027192895Sjamie 4028192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4029192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4030192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4031192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4032192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4033192895Sjamie "I", "Jail secure level"); 4034192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4035192895Sjamie "I", "Jail cannot see all mounted file systems"); 4036192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4037192895Sjamie "B", "Jail persistence"); 4038194251Sjamie#ifdef VIMAGE 4039194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4040194251Sjamie "B", "Virtual network stack"); 4041194251Sjamie#endif 4042192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4043192895Sjamie "B", "Jail is in the process of shutting down"); 4044192895Sjamie 4045194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4046194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4047194762Sjamie "I", "Current number of child jails"); 4048194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4049194762Sjamie "I", "Maximum number of child jails"); 4050194762Sjamie 4051192895SjamieSYSCTL_JAIL_PARAM_NODE(host, "Jail host info"); 4052193066SjamieSYSCTL_JAIL_PARAM(, nohost, CTLTYPE_INT | CTLFLAG_RW, 4053193066Sjamie "BN", "Jail w/ no host info"); 4054192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4055192895Sjamie "Jail hostname"); 4056193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4057193066Sjamie "Jail NIS domainname"); 4058193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4059193066Sjamie "Jail host UUID"); 4060193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4061193066Sjamie "LU", "Jail host ID"); 4062192895Sjamie 4063192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4064192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4065192895Sjamie 4066192895Sjamie#ifdef INET 4067192895SjamieSYSCTL_JAIL_PARAM_NODE(ip4, "Jail IPv4 address virtualization"); 4068192895SjamieSYSCTL_JAIL_PARAM(, noip4, CTLTYPE_INT | CTLFLAG_RW, 4069192895Sjamie "BN", "Jail w/ no IP address virtualization"); 4070192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4071192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4072192895Sjamie#endif 4073192895Sjamie#ifdef INET6 4074192895SjamieSYSCTL_JAIL_PARAM_NODE(ip6, "Jail IPv6 address virtualization"); 4075192895SjamieSYSCTL_JAIL_PARAM(, noip6, CTLTYPE_INT | CTLFLAG_RW, 4076192895Sjamie "BN", "Jail w/ no IP address virtualization"); 4077192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4078192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4079192895Sjamie#endif 4080192895Sjamie 4081192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4082192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4083192895Sjamie "B", "Jail may set hostname"); 4084192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4085192895Sjamie "B", "Jail may use SYSV IPC"); 4086192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4087192895Sjamie "B", "Jail may create raw sockets"); 4088192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4089192895Sjamie "B", "Jail may alter system file flags"); 4090192895SjamieSYSCTL_JAIL_PARAM(_allow, mount, CTLTYPE_INT | CTLFLAG_RW, 4091192895Sjamie "B", "Jail may mount/unmount jail-friendly file systems"); 4092192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4093192895Sjamie "B", "Jail may set file quotas"); 4094192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4095192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4096192895Sjamie 4097192895Sjamie 4098185435Sbz#ifdef DDB 4099191673Sjamie 4100191673Sjamiestatic void 4101191673Sjamiedb_show_prison(struct prison *pr) 4102185435Sbz{ 4103192895Sjamie int fi; 4104191673Sjamie#if defined(INET) || defined(INET6) 4105191673Sjamie int ii; 4106185435Sbz#endif 4107185435Sbz#ifdef INET6 4108185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4109185435Sbz#endif 4110185435Sbz 4111191673Sjamie db_printf("prison %p:\n", pr); 4112191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4113191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4114192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4115191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4116191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4117191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4118191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4119191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4120194251Sjamie#ifdef VIMAGE 4121194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4122194251Sjamie#endif 4123191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4124191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4125194762Sjamie db_printf(" childcount = %d\n", pr->pr_childcount); 4126192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4127192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4128191673Sjamie db_printf(" flags = %x", pr->pr_flags); 4129192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4130192895Sjamie fi++) 4131192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4132192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4133192895Sjamie db_printf(" allow = %x", pr->pr_allow); 4134192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4135192895Sjamie fi++) 4136192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4137192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4138191673Sjamie db_printf("\n"); 4139192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4140194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4141194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4142194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4143193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4144185435Sbz#ifdef INET 4145191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4146191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4147191673Sjamie db_printf(" %s %s\n", 4148191673Sjamie ii == 0 ? "ip4 =" : " ", 4149191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4150185435Sbz#endif 4151185435Sbz#ifdef INET6 4152191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4153191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4154191673Sjamie db_printf(" %s %s\n", 4155191673Sjamie ii == 0 ? "ip6 =" : " ", 4156191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4157191673Sjamie#endif 4158191673Sjamie} 4159191673Sjamie 4160191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4161191673Sjamie{ 4162191673Sjamie struct prison *pr; 4163191673Sjamie 4164191673Sjamie if (!have_addr) { 4165192895Sjamie /* 4166192895Sjamie * Show all prisons in the list, and prison0 which is not 4167192895Sjamie * listed. 4168192895Sjamie */ 4169192895Sjamie db_show_prison(&prison0); 4170192895Sjamie if (!db_pager_quit) { 4171192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4172192895Sjamie db_show_prison(pr); 4173192895Sjamie if (db_pager_quit) 4174192895Sjamie break; 4175192895Sjamie } 4176191673Sjamie } 4177191673Sjamie return; 4178191673Sjamie } 4179191673Sjamie 4180192895Sjamie if (addr == 0) 4181192895Sjamie pr = &prison0; 4182192895Sjamie else { 4183192895Sjamie /* Look for a prison with the ID and with references. */ 4184191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4185192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4186191673Sjamie break; 4187192895Sjamie if (pr == NULL) 4188192895Sjamie /* Look again, without requiring a reference. */ 4189192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4190192895Sjamie if (pr->pr_id == addr) 4191192895Sjamie break; 4192192895Sjamie if (pr == NULL) 4193192895Sjamie /* Assume address points to a valid prison. */ 4194192895Sjamie pr = (struct prison *)addr; 4195192895Sjamie } 4196191673Sjamie db_show_prison(pr); 4197185435Sbz} 4198191673Sjamie 4199185435Sbz#endif /* DDB */ 4200